(19)
(11)EP 3 388 271 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
23.09.2020 Bulletin 2020/39

(21)Application number: 16872913.5

(22)Date of filing:  02.12.2016
(51)International Patent Classification (IPC): 
B60K 6/36(2007.10)
B60K 6/485(2007.10)
F16D 3/52(2006.01)
H02K 7/00(2006.01)
B60K 6/405(2007.10)
B60K 6/26(2007.10)
F16D 1/06(2006.01)
F16H 33/02(2006.01)
F16F 15/08(2006.01)
(86)International application number:
PCT/JP2016/085896
(87)International publication number:
WO 2017/099015 (15.06.2017 Gazette  2017/24)

(54)

PARALLEL HYBRID POWER TRANSMISSION MECHANISM

MECHANISMUS ZUR PARALLELEN ÜBERTRAGUNG VON HYBRIDER ENERGIE

MÉCANISME DE TRANSMISSION D'ÉNERGIE HYBRIDE À CONFIGURATION PARALLÈLE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 11.12.2015 JP 2015241943

(43)Date of publication of application:
17.10.2018 Bulletin 2018/42

(60)Divisional application:
20191278.9

(73)Proprietor: Kubota Corporation
Osaka-shi, Osaka 556-8601 (JP)

(72)Inventors:
  • YAGYU, Sumio
    Sakai-shi Osaka 590-0823 (JP)
  • OKAZAKI, Kazuto
    Sakai-shi Osaka 590-0823 (JP)

(74)Representative: Lemcke, Brommer & Partner Patentanwälte Partnerschaft mbB 
Siegfried-Kühn-Straße 4
76135 Karlsruhe
76135 Karlsruhe (DE)


(56)References cited: : 
EP-A1- 0 302 118
JP-A- 2001 522 012
JP-A- 2010 221 775
US-A1- 2004 104 630
EP-A1- 3 157 144
JP-A- 2010 167 956
JP-A- 2012 512 081
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    [DETAILED DESCRIPTION OF THE INVENTION]


    [TECHNICAL FIELD]



    [0001] The present invention relates to a parallel hybrid power transmission mechanism for transmitting power of a combination of a motor generator and an engine.

    [BACKGROUND ART]



    [0002] In a parallel hybrid power transmission system combining a motor generator and an engine, as conventionally disclosed in Patent documents 1 and 2, the power is transmitted by connecting devices in the order of the crankshaft of the engine, the rotor of the motor generator, and the input shaft of the driven device. In this manner, (1) the power of the engine is transmitted to the driven device through the rotor of the motor generator, and (2) the power of the motor generator is directly transmitted from the rotor to the driven device. That is, the two motive power is transmitted through the rotor of the motor generator.

    [0003] In the conventional art, both of the power of the motor generator and the power of the crankshaft of the engine are transmitted to the driven device through the rotor of the motor generator. In this manner, the rotor is responsible for two power transmission, and the load applied to the rotor is increased.

    [0004] In addition, although the hydraulic pump is frequently used as the driven device in the industrial machinery, the hydraulic pump generates a large torque fluctuation depending on fluctuations of a required power. In the conventional art, torsional vibrations of the power transmission system depending on the torque fluctuation may be transmitted to the engine under the state where the clutch device is in a connected state.

    [0005] Also, when the torsional vibration mentioned above is applied to the rotor, a rotation signal from a rotation detector (a resolver) provided on the rotor will vibrate because the vector control is used for driving the motor generator. As the result, the control of the motor inverter becomes unstable, and there is a possibility to cause the step out and difficulty in the power control.

    [0006] Patent document 3 discloses a generator motor configured to support the rotor rotatably on the motor housing and to connect the flywheel and the rotor to each other by a cylindrical shaft portion in the spline-coupling manner. However, there arises a problem that the torsional vibrations and the like due to the fluctuating torque propagated from the driven device (the hydraulic pump and the like) are transmitted to the rotor through the spline coupling. That is, the technique disclosed in Patent document 3 is incapable of avoiding the influence of torsional vibrations or the like on the rotor, the torsional vibrations being generated by the fluctuating torque propagated from the driven device.

    [0007] In addition, in the hybrid system disclosed in Patent document 4, the output shaft of the engine, the flywheel, the rotor of the motor generator, and the rotation shaft of the hydraulic pump are connected in series. That is, the power transmission system configured to transmit the power of the engine from the flywheel to the rotor and the other power transmission system configured to transmit the power of the engine from the flywheel to the hydraulic pump are not independent (separated) from each other. In this manner, there arises a problem that the torsional vibrations due to the fluctuating torque propagated from the hydraulic pump are transmitted to the rotor through the hollow shaft.

    [0008] In addition, in the power transmission mechanism disclosed in Patent document 5, the rotor and the elastic joint are integrally connected to the rotating body. Thus, the power transmission system configured to transmit the power of the engine from the flywheel to the rotor and the other power transmission system configured to transmit the power of the engine from the flywheel to the power takeoff shaft through the elastic coupling both pass through the rotating body. That is, similar to the technique disclosed in Patent document 4, the two power transmission systems are not independent (separated) from each other. Thus, there arises a problem that the torsional vibrations or the like due to the fluctuating torque propagated from the power takeoff shaft are transmitted to the rotor through the rotating body.

    [0009] In addition, in the power transmission mechanism disclosed in Patent document 6, the input shaft of the driven device is directly connected to a damper arranged on the inner side (the inner circumferential side) of the rotor. In this manner, in order to connect the input shaft to the damper, it is necessary for the damper to be inserted deeply into the inside of the rotor, and thus the input shaft has to be protruded long. As the result, the input shaft that protrudes long is directly connected to the damper formed of an elastic material or the like, and thus it is difficult for the input shaft to be firmly connected to the damper while suppressing the misalignment and vibration of the core during the rotations. Thus, there is a possibility that the power cannot be smoothly transmitted from the engine to the driven device.

    [0010] In addition, in the power transmission mechanism disclosed in Patent document 7, the crankshaft, the flywheel, the damper device, the rotor, and the output shaft of the engine are connected in series. That is, similar to the technology disclosed in Patent documents 4 and 5, the power transmission system configured to transmit the power of the engine from the flywheel to the rotor and the power transmission system configured to transmit the power of the engine from the flywheel to the output shaft are not independent (separated) from each other. As the result, there arises a problem that the torsional vibrations or the like due to the fluctuating torque propagated from the output shaft is transmitted to the rotor through the output rotor.
    Document US2004/104630 A1 discloses a drive system for a motor vehicle connected to a combustion engine, wherein the drive system comprises a drive shaft, a centrifugal mass mounted on said drive shaft for rotation about an axis and being profiled with an axial receiving space, an electrical machine comprising a rotor mounted under centrifugal mass and a stator arranged radially with respect to said rotor, and at least one component accommodated in said receiving space. Document EP 0 302 118 A discloses a rotating electric machine comprising revolving-field poles, field windings, an armature core, an armature binding, and a crank angle detector as major components, wherein one revolving-field pole functions also as a flywheel, which is fitted on a crankshaft as revolving shaft of the engine.

    [RELATED ART DOCUMENTS]


    [PATENT DOCUMENTS]



    [0011] 

    [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2010-261544

    [Patent Document 2] Japanese Unexamined Patent Application Publication No. 2014-83869

    [Patent Document 3] Japanese Patent Publication No. 4646983

    [Patent Document 4] Japanese Unexamined Patent Application Publication No. 2008-290594

    [Patent Document 5] Japanese Unexamined Patent Application Publication No. 2009-184665

    [Patent Document 6] Japanese Unexamined Patent Application Publication No. 2003-81189

    [Patent Document 7] Japanese Unexamined Patent Application Publication No. 2012-71731


    [DISCLOSURE OF THE INVENTION]


    [PROBLEMS TO BE SOLVED BY THE INVENTION]



    [0012] The present invention has been made to solve the above-mentioned problems of the conventional technique, and the present invention intends to provide a parallel hybrid power transmission mechanism configured to reduce a load applied to a rotor of a motor generator and to suppress torsional vibrations or the like due to a fluctuating torque from being propagated from a driven device to an engine and the rotor. In addition, the present invention intends to provide a parallel hybrid power transmission mechanism configured to smoothly transmit a power from the engine to the driven device.

    [MEANS OF SOLVING THE PROBLEMS]



    [0013] The present invention adopts the following technical means in order to attain the above constitution.

    [0014] In a first aspect, a parallel hybrid power transmission mechanism includes an engine, a crank shaft disposed on the engine, a motor generator, a driven device to which a power of the engine and/or the motor generator is transmitted, an input shaft disposed on the driven device, a flywheel connected to the crank shaft and configured to be rotated, a rotor disposed on the motor generator, including a first connecting portion connected to an outside of the flywheel in a radial direction, the rotor being configured to supply and receive a rotational force to and from the flywheel through the first connecting portion, a coupling arranged independently from the rotor, including a second connecting portion connected to an inside of the flywheel in the radial direction, the coupling being configured to receive the rotational force of the flywheel through the second connecting portion, and an intermediate shaft connecting the coupling and the input shaft to each other, the intermediate shaft being configured to transmit the rotational force received by the coupling to the input shaft, wherein the coupling includes a hub formed of flexible material and connected to the intermediate shaft, and a disk formed of rigid material, the disk protruding from the hub outwardly in the radial direction and including the second connecting portion connected to the flywheel, the rotor has a rotor boss having a hollow shape, the flywheel has a first concave portion on the rotor boss side, the rotor boss is arranged on an outside of the intermediate shaft in the radial direction between the rotor boss and the flywheel, and has a second concave portion on the flywheel side, and the hub of the coupling is arranged between the first concave portion and the second concave portion.

    [0015] In an alternative aspect, the coupling includes a hub formed of flexible material and connected to the intermediate shaft, and a disk formed of flexible material, the disk protruding from the hub outwardly in the radial direction and including the second connecting portion connected to the flywheel.

    [0016] In a second aspect, the hub has a projecting portion projecting toward the rotor boss side and projecting gradually higher on an outer side in the radial direction, and the projecting portion is arranged in the second concave portion.

    [0017] In a third aspect, the parallel hybrid power transmission mechanism includes a flywheel housing surrounding the flywheel, and a motor housing surrounding the motor generator, the motor housing being connected to the flywheel housing with an inner space opposed to the flywheel housing, the first concave portion includes an annular concave portion to which an outer circumference of the coupling is attached, a flange portion is formed on an end portion of the rotor boss, the flange portion protruding in the radial direction and including the first connecting portion, and the flange portion is connected to the annular concave portion.

    [0018] In an fourth aspect, the parallel hybrid power transmission mechanism includes an intermediate bearing configured to support the rotor boss rotatably on the intermediate shaft, and the intermediate shaft is connected to the flywheel by the coupling.

    [0019] In a fifth aspect, the parallel hybrid power transmission mechanism includes a rotation detector configured to detect a rotation phase of the rotor.

    [EFFECTS OF THE INVENTION]



    [0020] A parallel hybrid power transmission mechanism includes an engine, a crank shaft disposed on the engine, a motor generator, a driven device to which a power of the engine and/or the motor generator is transmitted, an input shaft disposed on the driven device, a flywheel connected to the crank shaft and configured to be rotated, a rotor disposed on the motor generator, including a first connecting portion connected to an outside of the flywheel in a radial direction, the rotor being configured to supply and receive a rotational force to and from the flywheel through the first connecting portion, a coupling arranged independently from the rotor, including a second connecting portion connected to an inside of the flywheel in the radial direction, the coupling being configured to receive the rotational force of the flywheel through the second connecting portion, and an intermediate shaft connecting the coupling and the input shaft to each other, the intermediate shaft being configured to transmit the rotational force received by the coupling to the input shaft. In this manner, a power transmission system (a first power transmission system) configured to transmit a rotational power of the flywheel to the coupling through the second coupling portion and transmits the rotation power of the flywheel from the coupling to the driven device through the intermediate shaft and a power transmission system (a second power transmission system) configured to transmit the rotational power of the flywheel directly to the rotor through the first connecting portion are formed independently from each other. Thus, the rotational power of the flywheel based on the driving of the engine can be transmitted, by the first power transmission system, to the driven device directly in a short distance without passing through the rotor. In addition, the rotational power of the flywheel can be transmitted to the rotor of the motor generator in the second power transmission system. In this manner, the interference between the two power transmission systems is eliminated, the rotor transmits only the power of the motor generator, and thus the load that the rotor should bear can be reduced. In addition, torsional vibration generated by a fluctuating torque propagated from the driven device can be isolated by an inertia force of the flywheel. Thus, the influence of the torsional vibration and the like on the engine and the motor generator decreases, and the noise also decreases. Furthermore, since the rotational power of the rotor based on the driving of the motor generator can be transmitted to the driven device through the flywheel in the second power transmission system, the rotational power of the rotor can assist the engine power transmitted to the driven device in the first power transmission system. In addition, the first power transmission system is formed on the inside of the flywheel in the radial direction, and the second power transmission system is formed on the outside of the flywheel in the radial direction. Thus, a configuration where the first power transmission system is incorporated inside the second power transmission system is provided, and thus the power transmission mechanism having the two power transmission systems can be compactly constituted. Furthermore, since the input shaft of the driven device and the coupling are connected to each other through the intermediate shaft, the input shaft can be shortened. This makes it possible to reliably and smoothly transmit the power from the engine to the driven device. In addition, it is possible to easily connect the input shaft and the coupling to each other.

    [0021] In addition, the coupling includes a hub formed of flexible material and connected to the intermediate shaft, and a disk formed of rigid material, the disk protruding from the hub outwardly in the radial direction and including the second connecting portion connected to the flywheel. Thus, it is possible to buffer or absorb the torsional vibration or the like generated by the fluctuating torque propagated from the driven device by the hub of the coupling, the hub being formed of flexible material. In addition, due to the disk formed of rigid material, the power transmission from the flywheel to the intermediate shaft can be reliably performed through the coupling.

    [0022] In addition, the coupling includes a hub formed of flexible material and connected to the intermediate shaft, and a disk formed of flexible material, the disk protruding from the hub outwardly in the radial direction and including the second connecting portion connected to the flywheel. Thus, the torsional vibrations or the like generated by the fluctuating torque propagated from the driven device can be buffered or absorbed by the hub and the disk of the coupling the hub being formed of flexible material.

    [0023] In addition, the rotor has a rotor boss having a hollow shape, the rotor boss being arranged on an outside of the intermediate shaft in the radial direction, and the coupling is arranged on the outside of the intermediate shaft in the radial direction between the rotor boss and the flywheel. Thus, the intermediate shaft is incorporated inside the rotor boss, a configuration where the two power transmission systems (the first power transmission system and the second power transmission system) are arranged in parallel is provided, and thus the power transmission mechanism can be configured compactly. In addition, the engine, the motor generator, and the driven device can be arranged close to each other, and the distance from the flywheel to the driven device can be further shortened. In this manner, the power transmission mechanism can be configured compactly, and the torsional vibration and the like applied from the driven device to the engine and the motor generator can be reduced.

    [0024] In addition, the flywheel has a first concave portion on the rotor boss side, the rotor boss has a second concave portion on the flywheel side, and the hub of the coupling is arranged between the first concave portion and the second concave portion. Thus, the flywheel, the rotor boss, and the coupling can be arranged close to each other, and the power transmission mechanism can be configured compactly.

    [0025] In addition, the hub has a projecting portion projecting toward the rotor boss side and projecting gradually higher on an outer side in the radial direction, and the projecting portion is arranged in the second concave portion. Thus, it is possible to arrange the rotor boss and the coupling close to each other in a precise positional relation. This makes it possible to configure the power transmission mechanism compactly and precisely.

    [0026] The parallel hybrid power transmission mechanism includes a flywheel housing surrounding the flywheel, and a motor housing surrounding the motor generator, the motor housing being connected to the flywheel housing with an inner space opposed to the flywheel housing, the first concave portion includes an annular concave portion to which an outer circumference of the coupling is attached, a flange portion is formed on an end portion of the rotor boss, the flange portion protruding in the radial direction and including the first connecting portion, and the flange portion is connected to the annular concave portion. Thus, both of the power of the engine and the power of the motor generator can be transmitted to the driven device through the flywheel and the coupling. In addition, it is also possible to buffer or isolate the transmission of the torsional vibrations or the like traveling from the driven device to the engine and the motor generator.

    [0027] Also, the parallel hybrid power transmission mechanism includes an intermediate bearing configured to support the rotor boss rotatably on the intermediate shaft, and the intermediate shaft is connected to the flywheel by the coupling. In this manner, the rotation accuracy of the rotor is hard to be lowered even by the blurring of the surface of the flywheel or the wobbling of the core, and thus the rotor can be supported with high rotational precision. That is, the intermediate shaft is connected to the flywheel by the coupling, and thereby the rotation accuracy of the intermediate shaft can be improved. Then, the rotor is supported by the intermediate bearing rotatably with respect to the intermediate shaft having high rotational precision, and thereby the rotational precision of the rotor is maintained high. This makes it possible to suppress fluctuations of the air gap between the stator of the motor generator and the rotor.

    [0028] Further, the parallel hybrid power transmission mechanism includes a rotation detector configured to detect a rotation phase of the rotor. Thus, the rotor is isolated by the coupling from the torsional vibrations or the like transmitted from the driven device, and thus the power of the motor generator can be stably controlled.

    [BRIEF DESCRIPTION OF THE DRAWINGS]



    [0029] 

    FIG. 1 is a cross-sectional view illustrating one example of a parallel hybrid power transmission mechanism according to an embodiment of the present invention.

    FIG. 2 is a perspective view illustrating a coupling according to the embodiment;

    FIG. 3 is a plan view illustrating the coupling according to the embodiment.

    FIG. 4 is a view illustrating an A-A cross section of FIG. 3.

    FIG. 5 is a view explaining a first power transmission system and a second power transmission system according to the embodiment.

    FIG. 6 is a view explaining a power transmission path from an engine and another power transmission path from a motor generator according to the embodiment; and

    FIG. 7 is a cross-sectional view illustrating another parallel hybrid power transmission mechanism according to another embodiment of the present embodiment.


    [BEST MODE FOR CARRYING OUT THE INVENTION]



    [0030] Embodiments of the present invention will be described below with reference to the drawings.

    [0031] FIG. 1 is a cross-sectional view showing an example of a parallel hybrid power transmission mechanism 1 (hereinafter simply referred to as a power transmission mechanism 1) according to an embodiment of the present invention. The power transmission mechanism 1 is applied to an industrial machine such as an agricultural machine, a construction machine, a utility vehicle, and the like.

    [0032] The power transmission mechanism 1 includes an engine 2, a flywheel 3, a motor generator 4, a driven device 5, and a coupling 6. The power transmission mechanism 1 transmits the power of the engine 2 and the power of the motor generator 4 alternately or in combination to the driven device 5.

    [0033] In the following description, the direction extending from the engine 2 to the driven device 5 (the left direction in FIG. 1) will be referred to as one direction, and the direction extending from the driven device 5 to the engine 2 (the right direction in FIG. 1) will be referred to as the other direction.

    [0034] The engine 2 is a diesel engine, a gasoline engine, or the like. The engine 2 is provided with a crankshaft 2a. The crankshaft 2a projects toward the driven device 5 side (one end side). A flywheel 3 is connected to a tip end (one end side) of the crankshaft 2a.

    [0035] The flywheel 3 has a substantially disk shape, and is formed of a material having a large mass (for example, a metal such as cast iron). A crankshaft 2a of the engine 2 is connected to the center of the flywheel 3. The flywheel 3 has a first concave portion 3a on a surface opposite to the engine 2 (on the one end side). The first concave portion 3a has a large-diameter concave portion 3b (an annular concave portion) and a small-diameter concave portion 3c, the large-diameter concave portion 3b being recessed in an annular shape, the small-diameter concave portion 3c being recessed deeper than the large-diameter concave portion 3b. The large-diameter concave portion 3b and the small-diameter concave portion 3c are formed concentrically each other, and the large-diameter concave portion 3b is provided on the radially outer side of the small-diameter concave portion 3c.

    [0036] The flywheel 3 is surrounded by a flywheel housing 9. The flywheel housing 9 has an outer circumferential portion 9a and a side wall 9b. The outer circumferential portion 9a is provided on the radially outer side of the flywheel 3. A motor housing 10 described later is fixed to an end portion of the outer circumferential portion 9a on the engine 2 side and to an end side of the opposite side (the one end side). The side wall 9b is provided at the end portion of the outer circumferential portion 9a on the engine 2 side. The flywheel 3 is arranged in an internal space surrounded by the outer circumferential portion 9a and the side wall 9b. The side wall 9b is fixed to the engine 2.

    [0037] The motor generator 4 is disposed on one end side of the flywheel 3. The motor generator 4 has a rotor 7 and a stator 8. As the motor generator 4, a three-phase AC synchronous motor of a permanent-magnet embedded type is preferably employed. However, another type of synchronous motor may be employed as the motor generator 4. For example, a synchronous motor in which a laminated steel plate is fitted to the rotor 7, the laminated steel plate on which a coil wound around, or the like may be employed. In addition, the motor generator 4 may be an AC motor or a DC motor.

    [0038] The rotor 7 provided in the motor generator 4 has a rotor boss 71 and a rotor main body 72. In addition, the rotor 7 has a first connecting portion 71c connected to the radially outer side of the flywheel 3. In the case where the motor generator 4 functions as an electric-power generator, the rotor 7 receives the rotational power of the flywheel 3 through the first connecting portion 71c. On the other hand, in the case where the motor generator 4 functions as an electric motor, the rotor 7 provides the rotational power to the flywheel 3 through the first connecting portion 71c. That is, the rotor 7 receives and provides the rotational power with respect to the flywheel 3 through the first connecting portion 71c.

    [0039] The first connecting portion 71c is provided on the side radially outer than the second connecting portion 62A described below, and is isolated (separated) from the second connecting portion 62A. In the embodiment, the extending portion 71c described below is the first connecting portion 71c.

    [0040] The rotor boss 71 has a hollow shape (a cylindrical shape) as a whole, and has a cylindrical portion 71a and a flange portion 71b. A rotor main body 72 is fitted on the outer circumference of the cylindrical portion 71a. The flange portion 71b is provided at the end portion of the rotor boss 71 on the flywheel 3 side, and extends in the radially outward direction. The flange portion 71b has an extending portion 71c and a second concave portion 71d. The second concave portion 71d is provided on the end face of the flange portion 71b on the flywheel 3 side, and is annularly recessed toward the side opposite to the flywheel 3. The shape of the second concave portion 71d corresponds to the shape of the projecting portion 61d (described later) of the coupling 6, the coupling 6 being opposed to the second concave portion 71d. The extending portion 71c is provided on the radially outer side of the second concave portion 71d (on the radially outer side of the coupling 6), andiskonnected to the flywheel 3. In particular, the extending portion 71c is fitted into the large diameter concave portion (an annular concave portion) 3b of the first concave portion 3a of the flywheel 3, and is connected to the flywheel 3. In the present embodiment, the extending portion 71c and the flywheel 3 are connected to each other by a connecting tool 18 such as a bolt. Meanwhile, it should be noted that the connecting tool 18 is located at a position shifted from the cross section shown in FIG. 1 in the circumferential direction of the flywheel 3, and is not shown in FIG. 1. Thus, for convenience of the explanation, the position in the radial direction of the connecting tool 18 is indicated by a chain line in FIG. 1.

    [0041] According to the configuration mentioned above, the rotor 7 is connected to the flywheel 3 at the extending portion 71c located on the radially outer side of the flywheel 3. That is, in the present embodiment, the extending portion 71c of the rotor boss 71 is the first connecting portion 71c configured to connect the rotor 7 to the radially outer side of the flywheel 3.

    [0042] However, the configuration of the first connecting portion 71c is not limited to the configuration of the present embodiment. That is, the first connecting portion 71c is a portion connecting the rotor 7 to the radially outer side of the flywheel 3. Thus, it is required for the first connecting portion 71c to be disposed on the radially outer side of the second connecting portion 62A described later under the state isolated (separated) from the second connecting portion 62A.

    [0043] The rotor main body 72 has an iron core (a laminated steel plate or the like) in which a permanent magnet is embedded. The rotor main body 72 is arranged on one end side of the flange portion 71b, and is opposed to the stator 8. The rotor main body 72 rotates integrally with the rotor boss 71 around the center axis of the rotor boss 71.

    [0044] The motor housing 10 has a cylindrical portion 10a and a cover 10b, the cylindrical portion 10a surrounding the outer circumference of the motor generator 4, the cover 10b being provided on one end side of the motor generator 4. An end portion of the outer circumferential portion 9a of the flywheel housing 9 on one end side (on the left side in FIG. 1) is fixed to an end portion of the cylindrical portion 10a on the other side (on the right side in FIG. 1). A pump housing (described later) of the driven device 5 is connected to the cover 10b. The stator 8 is fixed to the inner circumferential surface of the cylindrical portion 10a of the motor housing 10.

    [0045] The stator 8 is formed of, for example, a laminated steel plate and has a coil wound thereon. A water jacket 11 is interposed between the inner circumferential surface of the cylindrical portion 10a and the stator 8. The water jacket 11 is provided with a passage for allowing a refrigerant to pass therethrough. A rotor 7 is disposed on the radially inner side of the stator 8. The internal space of the motor housing 10 is opposed to and communicated with the internal space of the flywheel housing 9.

    [0046] The driven device 5 is driven by receiving the power from the engine 2 and/or the motor generator 4. The driven device 5 is, for example, a hydraulic pump, and more specifically, a hydraulic pump of a hydrostatic transmission can be exemplified. The driven device 5 is connected to the cover 10b of the motor housing 10 through a pump housing. The input shaft 5a provided on the driven device 5 extends toward the other end side (the right side in FIG. 1). The input shaft 5a is connected to the coupling 6 through the intermediate shaft 12. That is, the intermediate shaft 12 connects the input shaft 5a of the driven device 5 and the coupling 6 to each other.

    [0047] The intermediate shaft 12 is disposed concentrically in the rotor boss 71a having a hollow-shape. The intermediate shaft 12 is formed of a rigid material such as metal. The intermediate shaft 12 has a substantially cylindrical shape, and has a small diameter portion 12a and a large diameter portion 12b. The small diameter portion 12a is formed on one end side (on the driven device 5 side) of the intermediate shaft 12, and the large diameter portion 12b is formed on the other end side (on the engine 2 side) of the intermediate shaft 12. The axial length of the intermediate shaft 12 is substantially equal to the axial length of the rotor boss 71. One end (the left end in FIG. 1) of the intermediate shaft 12 is positioned slightly shifting to the other end side (to the right side in FIG. 1) from the one end (the left end in FIG. 1) of the rotor boss 71, and the other end (the right end in FIG. 1) of the intermediate shaft 12 is positioned slightly shifting to the other end side from the other end (the right end in FIG. 1) of the rotor boss 71. The other end of the intermediate shaft 12 is positioned within the small-diameter concave portion 3c of the first concave portion 3a of the flywheel 3.

    [0048] The input shaft 5a of the driven device 5 is connected to the inside of one end side (to the left side in FIG. 1) of the intermediate shaft 12. In the present embodiment, the connection between the intermediate shaft 12 and the input shaft 5a is made in the spline coupling method. The connection length L of the input shaft 5a to the intermediate shaft 12 is about one-third of the length of the intermediate shaft 12. In other words, in the axial direction, the position of the end portion of the input shaft 5a on the other end side is substantially same with the position of one end of the rotor main body 72.

    [0049] A clearance is formed between the outer circumferential surface of the small diameter portion 12a of the intermediate shaft 12 and the inner circumferential surface of the rotor boss 71. A large number of teeth (hereinafter referred to as external teeth) are formed along the outer circumferential surface of the large diameter portion 12b. The external teeth are engaged with internal teeth (described later) formed on the coupling 6. In this manner, the intermediate shaft 12 and the coupling 6 are connected to each other.

    [0050] As shown in FIG. 2 to FIG. 4, the coupling 6 has a hub 61 and a disk 62. In addition, the coupling 6 has a second connecting portion 62A connected to a radially inner side of the flywheel 3. The coupling 6 receives the rotational power of the flywheel 3 through the second connecting portion 62A. The second connecting portion 62A is provided on the side radially inner than the first connecting portion 71c, and is isolated (separated) from the first connecting portion 71c. In the present embodiment, the outer portion 62A described below is the second coupling portion 62A.

    [0051] The hub 61 is connected to the intermediate shaft 12, and the disk 62 is connected to the flywheel 3. In this manner, the coupling 6 connects the intermediate shaft 12 and the flywheel 3 to each other.

    [0052] As shown in FIG. 1, the hub 61 is arranged in a space formed between the second concave portion 71d of the rotor boss 71 and the first concave portion 3a of the flywheel 3. In this manner, since the coupling 6 is disposed close to the rotor boss 71 and the flywheel 3, the power transmission mechanism 1 can be configured compactly.

    [0053] The hub 61 has an inner diameter portion 61a and an outer diameter portion 61b. The inner diameter portion 61a and the outer diameter portion 61b are formed of a flexible material such as resin and rubber. The plastic (the synthetic resin) is preferably employed as the resin, and in particular, fiber reinforced plastic such as carbon fiber reinforced polyamide is suitably employed. In addition, the nylon (a registered trade mark), the polyester, the polyurethane and the like can be employed.

    [0054] The inner diameter portion 61a has a cylindrical shape, and forms a number of teeth (hereinafter referred to as internal teeth) along the inner circumferential surface. The internal teeth are engaged with the external teeth formed on the outer circumferential surface of the large diameter portion 12b of the intermediate shaft 12. In this manner, the coupling 6 is connected to the tip end (end portion on the other end side) of the intermediate shaft 12. Since the coupling is made by the engagement between the internal teeth and the external teeth, the power can be securely transmitted from the coupling 6 to the intermediate shaft 12. In addition, the rotation accuracy of the intermediate shaft 12 can be maintained high.

    [0055] Here, the internal teeth or the external teeth are the curving teeth (the curved-teeth). In particular, the internal teeth or the external teeth are curved so as to have an arcuate bulge in the tooth width direction. In this manner, the misalignment (the vibration of the core or the like) in the axial direction, in the radial direction, and in the angular direction between the input shaft 5a, the intermediate shaft 12, and the flywheel 3 can be absorbed.

    [0056] The outer diameter portion 61b is formed in an annular shape, and is provided on the radially outer side of the inner diameter portion 61a. The outer diameter portion 61b has an outer annular portion 61c and a projecting portion 61d, the outer annular portion 61c having an annular shape and extending radially outward, the projecting portion 61d protruding toward the rotor boss 71 side. The projecting portion 61d projects in a truncated cone shape so that the amount of projection increases as it goes toward the radially inner side of the outer diameter portion 61b. The projecting portion 61d is arranged in the second concave portion 71 d of the rotor boss 71. However, the projecting portion 61d and the second concave portion 71d are not connected to each other, and the coupling 6 and the rotor 7 (the rotor boss 71) are not connected to each other. That is, the coupling 6 and the rotor 7 are independent from each other. In other words, the coupling 6 and the rotor 7 are isolated from each other. Thus, the rotational power of the coupling 6 is not transmitted to the rotor 7. In addition, the rotational power of the rotor 7 is not directly transmitted to the coupling 6.

    [0057] The coupling 6 and the rotor 7 may be in contact with each other, or they may be slightly separated from each other. In the case where the coupling 6 and the rotor 7 are in contact with each other, it is possible to accurately and easily position the coupling 6 with respect to the rotor 7. In addition, the outer diameter portion 61b formed of a flexible material such as a resin exhibits a lubricating action. Thus, the abrasion of the contacting portion between the coupling 6 and the rotor 7 can be suppressed, and the lubricating oil is not required to be supplied to the abutting portion. In this manner, it is possible to simplify the maintenance.

    [0058] The disk 62 is formed of a plate having an annular and ring shape, and is formed of a rigid material such as metal in the present embodiment. As shown in FIG. 4, the disk 62 has an outer portion 62A disposed on the radially outer side of the disk 62 and an inner portion 62B disposed on the radially inner side. The outer portion 62A protrudes radially outward from the outer annular portion 61c of the outer diameter portion 61b of the hub 61. The outer portion 62A is connected to the large-diameter concave portion 3b of the flywheel 3 as described later. The inner portion 62B is embedded in the outer diameter portion 61b of the hub 61.

    [0059] As shown in FIG. 3, a plurality of through holes 62a are formed at equal intervals in the circumferential direction on the outer portion 62A of the disk 62. Connecting tools such as bolts 13 are inserted through the plurality of through holes 62a. The connecting tool 13 is arranged on the radial inner side of the flywheel 3 with respect to the connecting tool 18 and at a position different from the connecting tool 18 in the circumferential direction. The connecting tool 13 is screwed into a screw hole formed on the radially inner side of the large-diameter concave portion 3b of the flywheel 3, and thereby to connect the disk 62 and the flywheel 3 to each other. In this manner, the outer portion 62A of the disk 62 of the coupling 6 is connected to the flywheel 3 on the radially inner side of the flywheel 3. That is, in the present embodiment, the outer portion 62A of the disk 62 is the second connecting portion 62A connecting the coupling 6 to the radially inner side of the flywheel 3.

    [0060] However, the configuration of the second connecting portion 62A is not limited to the configuration of the present embodiment. That is, the second connecting portion 62A is a portion that connects the coupling 6 to the radially inner side of the flywheel 3, and it is required for the second connecting portion 62A to be disposed on the radially inner side of the first connecting portion 71c under the state isolated (separated) from the first connecting portion 71c.

    [0061] In another embodiment of the coupling 6, both of the hub 61 and the disk 62 may be formed of a flexible material such as resin or rubber. In that case, it is preferable to form the hub 61 and the disk 62 integrally with the same flexible material. The plastic (the synthetic resin) is suitable as the resin, and for example, the fiber reinforced plastic such as the nylon (a registered trade mark), the polyester, the polyurethane, the carbon fiber reinforced polyamide, or the like is suitably employed.

    [0062] The coupling 6 is radially positioned in the radial direction with respect to the flywheel 3. In other words, the coupling 6 is positioned so that the center axis of the coupling 6 is concentric with the center axis of the flywheel 3.

    [0063] The coupling 6 connects the input shaft 5a of the driven device 5 and the flywheel 3 to each other by the intermediate shaft 12. In this manner, the coupling 6 provides the function of transmitting the power from the flywheel 3 to the intermediate shaft 12. In addition, since the coupling 6 has the portion (the hub 61, or the hub 61 and the disk 62) formed of the flexible material, the coupling 6 can buffer or absorb the impact and torsional vibrations and the like caused by the torque fluctuation propagated from the intermediate shaft 12 to the flywheel 3 side. Further, since the internal teeth or the external teeth are the curved-teeth, the misalignment (the vibration of the core or the like) in the axial direction, in the radial direction, and in the angular direction between the input shaft 5a, the intermediate shaft 12, and the flywheel 3 can be absorbed.

    [0064] In addition, the flywheel 3 is connected to the driven device 5 by the coupling 6 and the intermediate shaft 12. That is, the connection between the flywheel 3 and the driven device 5 is not a connection using the rotor 7 but a connection not using the rotor 7. Thus, the flywheel 3 and the driven device 5 are linearly connected, and thus the distance between the flywheel 3 and the driven device 5 can be shortened. In this manner, it possible to configure the power transmission mechanism 1 compactly.

    [0065] In addition, the rotor 7 is not directly connected to the driven device 5 but is connected to the driven device 5 by a flywheel 3 having a large inertial force and a coupling 6 including a flexible material. Thus, the torsional vibrations due to variable torques from the driven device 5 is cut off, and the torsional vibration or the like is not transmitted to the engine 2 and the motor generator 4.

    [0066] The power transmission mechanism 1 further includes a rotation detector 14 and a controller 15. The rotation detector 14 is configured to detect the rotation phase of the rotor 7. A resolver, an encoder, or the like is employed as the rotation detector 14. In the power transmission mechanism 1 for the industrial machines (the agricultural machines, the construction machines, and the like), a resolver having an excellent environmental resistance and having a good angle detection accuracy is suitably used. The rotation detector 14 is arranged between the cover 10b of the motor housing 10 and the rotor main body 72, and is in proximity to the outer circumferential surface of the cylindrical portion 71a of the rotor boss 71. The rotation detector 14 is connected to the controller 15.

    [0067] The controller 15 includes an inverter configured to perform the vector-control for the motor generator 4. The controller 15 is connected to the motor generator 4 by a power cable connecting portion 16 and the like. In addition, the controller 15 is also connected to the engine 2, the driven device 5, and the like. The controller 15 controls the driving, the stopping, and the rotation speed of the engine 2, the motor generator 4, the driven device 5, and the like.

    [0068] The power transmission mechanism 1 includes two power transmission systems (the power transmission parts) configured to transmit the rotational power of the flywheel 3. One of the power transmission systems (referred to as a first power transmission system) includes the flywheel 3, the second connecting portion 62A, the coupling 6, the intermediate shaft 12, and the driven device 5. As indicated by an arrowed line A in FIG. 5, the first power transmission system transmits the rotational power of the flywheel 3 to the coupling 6 through the second coupling portion 62A, and transmits the rotational power from the coupling 6 to the input shaft 5a of the driven device 5 through the intermediate shaft 12. The other one of the power transmission systems (referred to as a second power transmission system) includes the flywheel 3, the first connecting portion 71c, and the rotor 7. As indicated by an arrowed line B in FIG. 5, the second power transmission system transmits the rotational power of the flywheel 3 directly to the rotor 7 through the first connecting portion 71c. That is, the first power transmission system and the second power transmission system are independent (separated) from each other, and thus the power transmission systems are configured to transmit the power through separated paths.

    [0069] Next, the operation of the power transmission mechanism 1 will be described below.

    [0070] In the power transmission mechanism 1, when the engine 2 is driven, the rotational power of the engine 2 is transmitted to the flywheel 3 through the crankshaft 2a, and rotates the flywheel 3. As indicated by an arrowed line C in FIG. 6, the rotational power of the flywheel 3 is transmitted from the coupling 6 to the intermediate shaft 12, and then is transmitted from the intermediate shaft 12 to the input shaft 5a of the driven device 5. That is, the rotational power of the flywheel 3 generated by the driving of the engine 2 is transmitted to the driven device 5 through the first power transmission system.

    [0071] In addition, simultaneously with the driving of the driven device 5, the rotational power of the flywheel 3 is transmitted to the rotor 7 through the rotor boss 71 and activates the motor generator 4 as a generator. That is, the rotational power of the flywheel 3 is transmitted to the rotor 7 through the second power transmission system.

    [0072] During the power transmission by the second power transmission system, the rotational power of the engine 2 is transmitted to the rotor 7 through the flywheel 3. However, the rotor 7 is not connected to the input shaft 5a of the driven device 5. Thus, the driven device 5 is not a load of the rotation of the rotor 7, and the rotor 7 is free from the influence of the load variation transmitted from the driven device 5.

    [0073] On the other hand, when the motor generator 4 is driven in addition to the driving of the engine 2, the rotor 7 rotates. As indicated by an arrowed line D in FIG. 6, the rotational power of the rotor 7 is transmitted from the flywheel 3 to the intermediate shaft 12 through the coupling 6, and then transmitted from the intermediate shaft 12 to the input shaft 5a of the driven device 5 . That is, the rotational power of the rotor 7 is transmitted to the driven device 5 through the second power transmission system. By the rotational power generated by the driving of the motor generator 4, the power transmitted from the engine 2 to the driven device 5 through the first power transmission system is assisted. That is, the driven device 5 is driven by the combined power of the power from the first power transmission system and the power from the second power transmission system.

    [0074] As described above, the first power transmission system configured to transmit the power from the flywheel 3 to the driven device 5 and the second power transmission system configured to transmit the power from the flywheel 3 to the rotor 7 are independent from each other. In this manner, the power of the engine 2 is transmitted from the flywheel 3 to the driven device 5 without passing through the rotor 7, and thus the first power transmission system and the second power transmission system do not interfere with each other.

    [0075] If there is a torque fluctuation due to a change of required power while the driven device 5 is being driven, the impact, the torsional vibrations, or the like occurs in the first power transmission system. The torsional vibrations and the like are propagated from the input shaft 5a of the driven device 5 to the intermediate shaft 12. However, the torsional vibrations or the like is buffered and absorbed by the coupling 6, and is cut off by the inertia force of the flywheel 3. Thus, propagation of the impact, the torsional vibration, and the like is greatly reduced, and thus the engine 2 and the rotor 7 are free from the influence the load variation transmitted from the driven device 5.

    [0076] The torsional vibrations propagated from the driven device 5 to the rotor 7 is buffered, absorbed, and isolated, and thereby the rotation detector 14 provided on the rotor 7 can generate a rotation signal free from the vibrations. Thus, the vector control for driving the motor generator 4 through the controller 15 can be stably and accurately performed, and it is possible to prevent the power control from being disabled due to the step out.

    [0077] In addition, since the coupling 6 has the portion (the hub 61, or the hub 61 and the disk 62) formed of a flexible material such as a resin, the torsional vibrations mentioned above can be absorbed.

    [0078] In addition, the intermediate shaft 12 is connected to the input shaft 5a of the driven device 5, and the intermediate shaft 12 is connected to the flywheel 3 by the coupling 6. In the case where the disk 62 of the coupling 6 is formed of a rigid material, it is possible to perform the connection between the flywheel 2 and the coupling 6 with high precision, and it is possible to improve the rotation accuracy of the intermediate shaft 12.

    [0079] FIG. 7 shows another embodiment of the power transmission mechanism 1.

    [0080] As shown in FIG. 7, an intermediate bearing 17 may be arranged in a gap between the outer circumferential surface of the small diameter portion 12a of the intermediate shaft 12 and the inner circumferential surface of the rotor boss 71. A needle bearing or the like is employed as the intermediate bearing 17, for example. The intermediate bearing 17 supports the rotor 7 rotatably with respect to the intermediate shaft 12. In this manner, the intermediate shaft 12 and the rotor 7 are mutually supported to prevent the resonance. Then, the rotor 7 is supported by the intermediate bearing 17 rotatably with respect to the intermediate shaft 12 with high rotational accuracy, and thereby the rotation accuracy of the rotor 7 is maintained high. Thus, the air gap between the rotor 7 and the stator 8 is prevented from fluctuating depending on the rotations of the rotor 7. In addition, it is also possible to suppress variations in the air gap between the rotor 7 and the stator of the rotation detector 14 such as a resolver.

    [0081] In the above description, the embodiment of the present invention has been explained. However, all the features of the embodiment disclosed in this application should be considered just as examples, and the embodiment does not restrict the present invention accordingly. A scope of the present invention is shown not in the above-described embodiment but in claims, and is intended to include all modifications within and equivalent to a scope of the claims. For example, the large diameter concave portion (the annular concave portion) 3b of the flywheel 3 and the flange portion 71b of the rotor boss 71 may be connected with an elastic body or a coupling interposed therebetween.

    [DESCRIPTION OF THE REFERENCE NUMERAL]



    [0082] 
    1
    Parallel hybrid power transmission mechanism
    2
    Engine
    2a
    Crank shaft
    3
    Flywheel
    3a
    First concave portion
    3b
    Large-diameter concave portion (Annular concave portion)
    3c
    Small-diameter concave portion
    4
    Motor generator
    5
    Driven device
    5a
    Input shaft
    6
    Coupling
    61
    Hub
    61a
    Inner-diameter portion
    61b
    Outer-diameter portion
    61c
    Outer-annular portion
    61d
    Projecting portion
    62
    Disk
    62A
    Second connecting portion (Outside portion)
    7
    Rotor
    71
    Rotor boss
    71a
    Cylindrical portion
    71b
    Flange portion
    71c
    First connecting portion
    71d
    Second concave portion
    72
    Rotor
    8
    Stator
    9
    Flywheel housing
    9a
    Outer circumference portion
    9b
    Side wall
    10
    Motor housing
    12
    Intermediate shaft
    14
    Rotation detector
    15
    Controller
    17
    Intermediate bearing



    Claims

    1. A parallel hybrid power transmission mechanism comprising:

    an engine (2);

    a crank shaft (2a) disposed on the engine (2);

    a motor generator (4);

    a driven device (5) to which a power of the engine (2) and/or the motor generator (4) is transmitted;

    an input shaft (5a) disposed on the driven device (5);

    a flywheel (3) connected to the crank shaft (2a) and configured to be rotated;

    a rotor (7) disposed on the motor generator (4), including
    a first connecting portion (71c) connected to an outside of the flywheel (3) in a radial direction, the rotor (7) being configured to supply and receive a rotational force to and from the flywheel (3) through the first connecting portion (71c);

    a coupling (6) arranged independently from the rotor (7), including
    a second connecting portion (62A) connected to an inside of the flywheel (3) in the radial direction, the coupling (6) being configured to receive the rotational force of the flywheel (3) through the second connecting portion (62A); and

    an intermediate shaft (12) connecting the coupling (6) and the input shaft (5a) to each other, the intermediate shaft (12) being configured to transmit the rotational force received by the coupling (6) to the input shaft (5a) characterized in that

    the coupling (6) includes:

    a hub (61) formed of flexible material and connected to the intermediate shaft (12); and

    a disk (62) formed of rigid material, the disk (62) protruding from the hub (61) outwardly in the radial direction and including the second connecting portion (62A) connected to the flywheel (3),

    the rotor (7) has a rotor boss (71) having a hollow shape,

    the flywheel (3) has a first concave portion (3a) on the rotor boss (71) side,

    the rotor boss (71) is arranged on an outside of the intermediate shaft (12) in the radial direction between the rotor boss (71) and the flywheel (3), and has a second concave portion (71d) on the flywheel (3) side, and

    the hub (61) of the coupling (6) is arranged between the first concave portion (3a) and the second concave portion (71d).


     
    2. The parallel hybrid power transmission mechanism according to claim 1, wherein the hub (61) has
    a projecting portion (61d) projecting toward the rotor boss (71) side and projecting gradually higher on an inner side in the radial direction,
    and wherein the projecting portion (61d) is arranged in the second concave portion (71d).
     
    3. The parallel hybrid power transmission mechanism according to claim 1 or 2, comprising:

    a flywheel housing (9) surrounding the flywheel (3); and

    a motor housing (10) having an inner space and surrounding the motor generator (4), the motor housing (10) being connected to the flywheel housing (9) with the inner space opposed to the flywheel housing (9),

    wherein the first concave portion (3a) includes
    an annular concave portion (3b) to which an outer circumference of the coupling (6) is attached,

    wherein a flange portion (71b) is formed on an end portion of the rotor boss (71), the flange portion (71b) protruding in the radial direction and including the first connecting portion (71c),

    and wherein the flange portion (71b) is connected to the annular concave portion (3b).


     
    4. The parallel hybrid power transmission mechanism according to any one of claims 1 to 3, comprising
    an intermediate bearing (17) configured to support the rotor boss (71) rotatably on the intermediate shaft (12),
    wherein the intermediate shaft (12) is connected to the flywheel (3) by the coupling (6).
     
    5. The parallel hybrid power transmission mechanism according to any one of claims 1 to 4, comprising
    a rotation detector (14) configured to detect a rotation phase of the rotor (7).
     


    Ansprüche

    1. Parallelhybrid-Leistungsübertragungsmechanismus, umfassend:

    einen Verbrennungsmotor (2),

    eine Kurbelwelle (2a), die an dem Verbrennungsmotor (2) angeordnet ist;

    einen Motorgenerator (4);

    eine angetriebene Vorrichtung (5), an die eine Leistung des Verbrennungsmotors (2) und/oder des Motorgenerators (4) übertragen wird;

    eine Eingangswelle (5a), die an der angetriebenen Vorrichtung (5) angeordnet ist;

    eine Schwungscheibe (3), die mit der Kurbelwelle (2a) verbunden und dazu konfiguriert ist, gedreht zu werden;

    einen Rotor (7), der an dem Motorgenerator (4) angeordnet ist, aufweisend:
    einen ersten Verbindungsteil (71c), der mit einer Außenseite der Schwungscheibe (3) in einer radialen Richtung verbunden ist, wobei der Rotor (7) dazu konfiguriert ist, über den ersten Verbindungsteil (71c) eine Drehkraft an die Schwungscheibe (3) zu liefern und von dieser zu empfangen;

    eine Kupplung (6), die unabhängig von dem Rotor (7) angeordnet ist, aufweisend:
    einen zweiten Verbindungsteil (62A), der mit einer Innenseite der Schwungscheibe (3) in der radialen Richtung verbunden ist, wobei die Kupplung (6) dazu konfiguriert ist, die Drehkraft der Schwungscheibe (3) über den zweiten Verbindungsteil (62A) zu empfangen; und

    eine Zwischenwelle (12), die die Kupplung (6) und die Eingangswelle (5a) miteinander verbindet, wobei die Zwischenwelle (12) dazu konfiguriert ist, die von der Kupplung (6) empfangene Drehkraft an die Eingangswelle (5a) zu übertragen, dadurch gekennzeichnet, dass

    die Kupplung (6) aufweist:

    eine Nabe (61), die aus einem flexiblen Werkstoff ausgebildet ist und mit der Zwischenwelle (12) verbunden ist; und

    eine Scheibe (62), die aus einem steifen Werkstoff ausgebildet ist, wobei die Scheibe (62) von der Nabe (61) in einer radialen Richtung nach außen vorsteht und den zweiten Verbindungsteil (62A), der mit der Schwungscheibe (3) verbunden ist, aufweist, der Rotor (7) eine Rotornabe (71) hat, die eine hohle Form hat,

    die Schwungscheibe (3) auf der der Rotornabe (71) zugewandten Seite einen ersten konkaven Teil (3a) hat,

    die Rotornabe (71) auf einer Außenseite der Zwischenwelle (12) in der radialen Richtung zwischen der Rotornabe (71) und der Schwungscheibe (3) angeordnet ist und auf der der Schwungscheibe (3) zugewandten Seite einen zweiten konkaven Teil (71d) hat, und

    die Nabe (61) der Kupplung (6) zwischen dem ersten konkaven Teil (3a) und dem zweiten konkaven Teil (71d) angeordnet ist.


     
    2. Parallelhybrid-Leistungsübertragungsmechanismus gemäß Anspruch 1, wobei die Nabe (61) Folgendes hat:
    einen vorstehenden Teil (61d), der zu der der Rotornabe (71) zugewandten Seite hin vorsteht und auf einer Innenseite in der radialen Richtung zunehmend höher vorsteht,
    und wobei der vorstehende Teil (61d) in dem zweiten konkaven Teil (71d) angeordnet ist.
     
    3. Parallelhybrid-Leistungsübertragungsmechanismus gemäß Anspruch 1 oder 2, umfassend:

    ein Schwungscheibengehäuse (9), das die Schwungscheibe (3) umgibt; und

    ein Motorgehäuse (10), das einen Innenraum hat und den Motorgenerator (4) umgibt, wobei das Motorgehäuse (10) mit dem Schwungscheibengehäuse (9) verbunden ist, wobei der Innenraum dem Schwungscheibengehäuse (9) gegenüberliegt,

    wobei der erste konkave Teil (3a) aufweist:
    einen ringförmigen konkaven Teil (3b), an dem ein Außenumfang der Kupplung (6) befestigt ist,

    wobei ein Flanschteil (71b) an einem Stirnseitenteil der Rotornabe (71) ausgebildet ist, wobei der Flanschteil (71b) in der radialen Richtung vorsteht und den ersten Verbindungsteil (71c) aufweist,

    und wobei der Flanschteil (71b) mit dem ringförmigen konkaven Teil (3b) verbunden ist.


     
    4. Parallelhybrid-Leistungsübertragungsmechanismus gemäß einem der Ansprüche 1 bis 3, umfassend:

    ein Zwischenlager (17), das dazu konfiguriert ist, die Rotornabe (71) drehbar auf der Zwischenwelle (12) zu lagern,

    wobei die Zwischenwelle (12) über die Kupplung (6) mit der Schwungscheibe (3) verbunden ist.


     
    5. Parallelhybrid-Leistungsübertragungsmechanismus gemäß einem der Ansprüche 1 bis 4, umfassend:
    einen Rotationsdetektor (14), der dazu konfiguriert ist, eine Rotationsphase des Rotors (7) zu erfassen.
     


    Revendications

    1. Mécanisme de transmission de puissance hybride à configuration parallèle comprenant :

    un moteur (2) ;

    un vilebrequin (2a) qui est disposé sur le moteur (2) ;

    un générateur de moteur (4) ;

    un dispositif entraîné (5) auquel la puissance du moteur (2) et/ou du générateur de moteur (4) est transmise ;

    un arbre d'entrée (5a) qui est disposé sur le dispositif entraîné (5) ;

    un volant d'inertie (3) qui est connecté au vilebrequin (2a) et qui est configuré pour être entraîné en rotation ;

    un rotor (7) qui est disposé sur le générateur de moteur (4), incluant :

    une première partie de connexion (71c) qui est connectée à un extérieur du volant d'inertie (3) dans une direction radiale, le rotor (7) étant configuré pour appliquer une force de rotation sur le volant d'inertie (3) et pour recevoir cette même force de rotation en provenance de ce même volant d'inertie par l'intermédiaire de la première partie de connexion (71c) ;

    un couplage (6) qui est agencé de manière indépendante du rotor (7), incluant :

    une seconde partie de connexion (62A) qui est connectée à un intérieur du volant d'inertie (3) dans la direction radiale, le couplage (6) étant configuré pour recevoir la force de rotation du volant d'inertie (3) par l'intermédiaire de la seconde partie de connexion (62A) ; et

    un arbre intermédiaire (12) qui connecte le couplage (6) et l'arbre d'entrée (5a) l'un à l'autre, l'arbre intermédiaire (12) étant configuré pour transmettre la force de rotation qui est reçue par le couplage (6) à l'arbre d'entrée (5a) ;

    caractérisé en ce que :
    le couplage (6) inclut :

    un moyeu (61) qui est formé en un matériau flexible et qui est connecté à l'arbre intermédiaire (12) ; et

    un disque (62) qui est formé en un matériau rigide, le disque (62) faisant saillie depuis le moyeu (61) vers l'extérieur dans la direction radiale et incluant la seconde partie de connexion (62A) qui est connectée au volant d'inertie (3) ;

    le rotor (7) comporte un bossage de rotor (71) qui présente une forme creuse ;

    le volant d'inertie (3) comporte une première partie concave (3a) sur le côté du bossage de rotor (71) ;

    le bossage de rotor (71) est agencé sur un extérieur de l'arbre intermédiaire (12) dans la direction radiale entre le bossage de rotor (71) et le volant d'inertie (3), et il comporte une seconde partie concave (71d) sur le côté du volant d'inertie (3) ; et

    le moyeu (61) du couplage (6) est agencé entre la première partie concave (3a) et la seconde partie concave (71d).


     
    2. Mécanisme de transmission de puissance hybride à configuration parallèle selon la revendication 1, dans lequel :
    le moyeu (61) comporte une partie en projection (61d) qui est en projection en direction du côté du bossage de rotor (71) et qui est en projection progressivement plus haut sur un côté interne dans la direction radiale ; et dans lequel :
    la partie en projection (61d) est agencée dans la seconde partie concave (71d).
     
    3. Mécanisme de transmission de puissance hybride à configuration parallèle selon la revendication 1 ou 2, comprenant :

    un carter de volant d'inertie (9) qui entoure le volant d'inertie (3) ; et

    un carter de moteur (10) qui comporte un espace interne et qui entoure le générateur de moteur (4), le carter de moteur (10) étant connecté au carter de volant d'inertie (9) de telle sorte que l'espace interne soit opposé au carter de volant d'inertie (9) ;

    dans lequel la première partie concave (3a) inclut :
    une partie concave annulaire (3b) à laquelle une circonférence externe du couplage (6) est liée ;

    dans lequel une partie de bride (71b) est formée sur une partie d'extrémité du bossage de rotor (71), la partie de bride (71b) faisant saillie dans la direction radiale et incluant la première partie de connexion (71c) ; et

    dans lequel la partie de bride (71b) est connectée à la partie concave annulaire (3b).


     
    4. Mécanisme de transmission de puissance hybride à configuration parallèle selon l'une quelconque des revendications 1 à 3, comprenant :

    un palier intermédiaire (17) qui est configuré pour supporter le bossage de rotor (71) à rotation sur l'arbre intermédiaire (12) ;

    dans lequel l'arbre intermédiaire (12) est connecté au volant d'inertie (3) par le couplage (6).


     
    5. Mécanisme de transmission de puissance hybride à configuration parallèle selon l'une quelconque des revendications 1 à 4, comprenant :
    un détecteur de rotation (14) qui est configuré pour détecter une phase de rotation du rotor (7).
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description