(19)
(11) EP 3 754 061 B1

(12) EUROPEAN PATENT SPECIFICATION

(45) Mention of the grant of the patent:
11.12.2024 Bulletin 2024/50

(21) Application number: 19180490.5

(22) Date of filing: 17.06.2019
(51) International Patent Classification (IPC): 
D01H 4/12(2006.01)
(52) Cooperative Patent Classification (CPC):
D01H 4/12

(54)

SPINNING ROTOR ASSEMBLY FOR A ROTOR SPINNING MACHINE

SPINNROTORANORDNUNG FÜR EINE ROTORSPINNMASCHINE

ENSEMBLE DE ROTOR DE FILAGE POUR UNE MACHINE À FILER À ROTOR À BOUT LIBRE


(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

(43) Date of publication of application:
23.12.2020 Bulletin 2020/52

(73) Proprietor: Saurer Czech s.r.o.
547 01 Náchod (CZ)

(72) Inventors:
  • Kohl, Ondrej
    549 46 Zábrodí (CZ)
  • Teiner, Petr
    549 54 Police nad Metují (CZ)

(74) Representative: Morgenthum-Neurode, Mirko 
Saurer Spinning Solutions GmbH & Co. KG Patentabteilung Carlstraße 60
52531 Übach-Palenberg
52531 Übach-Palenberg (DE)


(56) References cited: : 
EP-A1- 3 489 397
CN-A- 101 363 151
DE-U1- 8 808 476
JP-A- S58 156 035
US-A- 5 463 860
WO-A1-2006/007887
DE-A1- 2 622 628
GB-A- 1 370 838
JP-U- S5 961 282
   
       
    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


    [0001] The invention relates to a spinning rotor assembly for a rotor spinning machine as well as a rotor spinning machine.

    [0002] Rotor spinning machines are widely used for processing fiber material or roving into workable yarn or thread by a spinning rotor of a spinning rotor assembly. Such spinning rotor assemblies comprising the spinning rotor connected to a rotor shaft as well as at least one bearing unit are typically used in spinning machines, in particular in open-end rotor spinning machines.

    [0003] A rotor spinning machine with a spinning rotor assembly with the features of the preamble portion of claim 1 is known from document EP 3 489 397 A1.

    [0004] Further designs of a spinning rotor assembly are also known from the documents DE 26 22 628 A1, WO 2006/007887 A1, DE 88 08 476 U1 and GB 1 370 838 A. The spinning rotor assemblies known from these documents are designed such that a pivoting axle is provided at an end side of the brake lever without dividing the brake lever into an actuation side and a braking side.

    [0005] Additionally, a spinning rotor assembly is known from document CN 101 363 151 B. This document discloses a brake lever with a pivot axle arranged in parallel to the longitudinal axis of the rotor shaft and perpendicular to the pivoting axis of the housing. The brake lever is thereby built by a U-shaped profile element having from a view in longitudinal direction of the spinning rotor shaft a triangle shape. The pivot axle formed by a bolt is arranged at a distance from the spinning rotor shaft and extends in parallel to the longitudinal extension direction of the spinning rotor shaft.

    [0006] Such open-end rotor spinning machines are operated at speeds of 100,000 rpm and above. During the operation of the rotor spinning machine, the spinning rotor is typically arranged in a housing to protect an operator from being injured and to avoid any contact of the rotating spinning rotor with other parts of the rotor spinning machine or with materials in the surrounding environment. Accordingly, it is particularly important to quickly stop the rotation of the spinning rotor when the housing is opened. Additionally, opening the housing including a movement of the fast-rotating spinning rotor would lead to huge forces acting upon the spinning rotor assembly and in particular on the at least one bearing unit rotatably mounting the spinning rotor shaft to the housing, which might result in a wear or even a damaging of the spinning rotor assembly.

    [0007] It may be considered a first object of the present invention to propose a spinning rotor assembly of a rotor spinning machine which can be quickly stopped when a housing provided for protecting the spinning rotor is opened.

    [0008] It may be considered another object of the present invention to propose a spinning rotor assembly of a rotor spinning machine which can be securely operated, in particular to avoid an injury of a user operating the rotor spinning machine and/or to prevent materials in the environment of the rotor spinning machine from being captured by or entangled in the fast-rotating spinning rotor.

    [0009] A further objective of the invention may also be to propose a rotor spinning machine which automatically stops the fast-rotating spinning rotor quickly when the spinning rotor in operation becomes accessible and in particular when a housing is opened or pivoted.

    [0010] It might be finally considered an objective of the present invention to propose a spinning rotor assembly of a rotor spinning machine which automatically prevents damaging the bearing units of the spinning rotor assembly due to a movement and in particular a tilting of the fast-rotating spinning rotor.

    [0011] These and further objectives may be achieved by a spinning rotor assembly according to claim 1 or a rotor spinning machine according to claim 12. Dependent claims refer to preferred embodiments of the invention.

    [0012] Preferably, the spinning rotor assembly of the rotor spinning machine is a part of a spinbox of the rotor spinning machine, wherein most preferably the rotor spinning machine comprises several, in particular identical spinboxes.

    [0013] A rotor brake which at least automatically engages when the rotor assembly comprising the spinning rotor is moved from a first to a second position advantageously allows a safe operation of the rotor spinning machine. Additionally, the rotor brake can be used to stop the spinning rotor at a defined time and/or in a defined position, in particular in a defined rotational position of the rotor assembly. Additionally, the rotor brake favorably protects the bearing units from being damaged due to high forces resulting from movement, in particular tilting or pivoting the fast-rotating spinning rotor by an operator. The rotor brake might also be used to adjust the forces acting upon the bearing units according to specifications of the bearings. Finally, the rotor brake might advantageously be used to abruptly stop the spinning rotor to clean the spinning rotor from dust of the fiber material or roving supplied to the spinning rotor and/or of the yarn or thread produced in the spinning rotor.

    [0014] The rotor spinning machine might be any machine for processing fiber material or roving into workable yarn or thread by a spinning rotor. The rotor spinning machine might comprise only one single rotor, in particular arranged in a spinbox. Preferably, the spinning machine comprises several spinning rotors and in particular several identical spinboxes each comprising one spinning rotor. The rotor spinning machine can comprise further optional components, in particular provided for processing the fiber material or the roving before spinning and/or the yarn or the thread after spinning.

    [0015] To be able to process the fiber material or the roving, a spinning rotor assembly is provided, in particular to allow for a rotation of the spinning rotor with high rotational speed. The spinning rotor assembly is preferably a part of a spinbox of a rotor spinning machine. The spinning rotor assembly at least comprises a spinning rotor, a spinning rotor shaft and at least one bearing unit as well as a housing at least for protecting the spinning rotor. The rotor assembly might also comprise further parts such as a belt roller for transmission of the spinning rotor shaft by a drive belt or at least one resilient mounting element for damping vibrations between the bearing unit and the housing.

    [0016] The spinning rotor of the rotor spinning machine is a component or an assembly for processing fiber material or roving into workable yarn or thread and is in particular a spinning rotor of an open-end spinning machine. Preferably the spinning rotor is a rotor cup, which is more preferably build as one part and/or out of metal. Advantageously, the spinning rotor is a rotational-symmetric component to avoid imbalances during rotation. Such a spinning rotor might spin with more than 100,000 revolutions per minute and even up to 200,000 revolutions per minute during regular operation. Accordingly, even small imbalances would lead to large forces acting upon the rotating parts which have to be designed and/or built to withstand the forces of the regular operation.

    [0017] The spinning rotor shaft might be built as one component or as an assembly of several single components. Preferably, the spinning rotor shaft is built as one single part, extending from one end of the rotor assembly to the other. The spinning rotor shaft is provided for mounting the spinning rotor rotatably via at least one bearing unit to the housing. Advantageously, the spinning rotor shaft is a rotational-symmetric component to avoid imbalances during rotation. The spinning rotor shaft might have a constant diameter along its entire length. Preferably, the diameter in the middle of the spinning rotor shaft and/or in a section between at least two, preferably between all bearing units is larger than at the end sections of the spinning rotor shaft, in particular the end for mounting the spinning rotor.

    [0018] At least one bearing unit is provided for rotatably mounting the spinning rotor shaft to a housing of the spinning rotor assembly and/or of a spinbox and/or of the rotor spinning machine. Preferably, at least two bearing units are arranged on the spinning rotor shaft. More preferably, all bearing units are identical to each other and/or are arranged at a distance to one another along the spinning rotor shaft. The bearing unit may comprise and in particular be any kind of bearing; preferably however, the bearing units are each a rolling bearing.

    [0019] According to the invention, the spinning rotor assembly is movable between a first and a second position. Although this movement might also be a linear movement or comprise a lateral component, the movement is only a pivoting motion, most preferably with a single pivoting axis. Preferentially, the axis of the pivoting movement of the spinning rotor assembly is arranged perpendicular to the axis of rotation of the spinning rotor and/or of the spinning rotor shaft. Generally, the spinning rotor assembly may be movably mounted in the spinbox and/or relative to another part, unit or assembly of the spinbox or of the rotor spinning machine. Advantageously, the rotor assembly is movable and in particular pivotable relative to a girder, to a part of a housing and/or to a mounting frame for setting up and/or positioning a rotor spinning machine including the spinning rotor assembly to the ground.

    [0020] Accordingly, the housing of the spinning rotor assembly comprises two parts pivotably mounted to one another. The first part of the housing is fixed to the at least one bearing unit, preferably to all bearing units of the rotor assembly, and can be provided to be pivotally mounted relative to the rest of the rotor spinning machine or to the ground the rotor spinning machine is positioned on. The second part of the housing is arranged pivotally relative to the spinning rotor.

    [0021] According to the invention, a rotor brake is pivotally mounted to the housing, in particular a first part of the housing. The rotor brake is provided to efficiently brake the spinning rotor. Preferably, the rotor brake mechanically interacts with a part of the spinning rotor shaft to brake the spinning rotor. More preferably the rotor brake interacts with an end of the spinning rotor shaft and most preferably the rotor brake interacts with a part of the spinning rotor shaft provided to be driven by a drive belt and/or with a belt drive roller arranged at an end of the spinning rotor shaft.

    [0022] Also according to the invention, the rotor brake is mounted to the housing so that the rotor brake automatically engages when the spinning rotor assembly and/or accordingly also the housing of the spinning rotor assembly is moved from the first to the second position. Preferably, the engagement of the rotor brake is only driven by mechanical interaction of the rotor brake and further parts of the rotor spinning machine, in particular the spinning rotor assembly, the housing of the spinning rotor assembly and/ or parts of the rotor spinning machine for firmly positioning the rotor spinning machine to the ground.

    [0023] The first position is an operational position of the spinning rotor and can be a position where the spinning rotor assembly including the spinning rotor is driven to produce thread or yarn. In the first position, the first and the second part of the housing are in contact to form a closed housing. Accordingly, the second position is a position where the spinning rotor is accessible and can be a position where the spinning rotor is not in operation. In the second position, the first and the second part of the housing are not in contact to provide an opening to access the spinning rotor.

    [0024] Accordingly, the spinning rotor assembly is pivotal about a pivoting joint between a first, closed position for operation of the spinning rotor and a second, open position, where the spinning rotor is accessible. Further the rotor brake is built to automatically engage when the spinning rotor assembly is moved into the open position and/or to automatically release again when the spinning rotor assembly is moved into or reaches the closed position. Additionally preferentially, the spinning rotor assembly is movably, in particular pivotally mounted so that when moving into the second, open position, the end of the spinning rotor shaft or a belt roller, in particular arranged at an end of the spinning rotor shaft, is moved away from a drive belt and therefore the drive is disengaged and/or the connection to the actuator is interrupted. Most preferably, the disengagement from the drive belt and the engagement of the rotor brake, in particular a mechanical engagement of the rotor brake to the spinning rotor shaft, occur simultaneously or at least directly consecutively.

    [0025] It is also preferred that the rotor brake is built to be permanently engaged in the second, open position of the spinning rotor assembly and/or as long as the spinning rotor assembly is not in the closed position to ensure the safety of an operator of the rotor spinning machine. Such an embodiment of the rotor brake advantageously cannot be released as long as the spinning rotor is accessible. Preferably, the rotor brake is mechanically built to be engaged in the open position of the spinning rotor assembly. Even more preferably it is mechanically impossible to release the rotor brake as long as the spinning rotor assembly is not in the closed position. Hence, an operating error of an operator is impossible in such an embodiment.

    [0026] In a further development of the spinning rotor assembly according to the invention, the rotor brake is built entirely from mechanical parts and/or without an electric control and/or without electric actuators such as a motor or the like. Accordingly, the rotor brake is always functional and is in particular not dependent of an electrical power supply. It is further preferred that the rotor brake does not comprise any hydraulic or pneumatic components, at least for engaging the motor brake. Hence, the rotor brake is preferably always functional. According to the invention, the rotor brake is driven at least towards an engaged position solely by spring force.

    [0027] Generally, any surface or part of the rotor brake might interact with the spinning rotor shaft mechanically during the engagement of the rotor brake. However, it is preferred that the rotor brake comprises a braking surface which is brought in contact by spring force and in particular pressed by spring force against the spinning rotor shaft or against a belt roller preferably fixed to an end of the spinning rotor shaft when the rotor brake is engaged and/or when the spinning rotor assembly is moved out of the first, closed position. Preferentially, the braking surface is provided for a direct and/or a mechanical interaction with a surface of the spinning rotor shaft or a belt roller. More preferably the shape of the braking surface is adapted to the shape of the section of the spinning rotor shaft interacting with the braking surface. Most preferably, the braking surface has the same curvature or radius as the spinning rotor shaft or as the belt roller. Advantageously, the braking surface is shaped to provide a large contact area to the spinning rotor shaft.

    [0028] The rotor brake and in particular the braking surface of the rotor brake might engage the surface of the spinning rotor shaft or the belt roller in any position. However, it is preferred that the rotor brake is pressed against the surface of the spinning rotor shaft or of a belt roller opposite to the side of the spinning rotor shaft or the belt roller provided to be brought in contact with a drive belt so that the drive belt cannot get in contact with the rotor brake which might impede the braking effect. Also, arranging the drive belt and the rotor brake on opposing sides of the spinning rotor shaft, it is easily possible to pivot the spinning rotor shaft away from the drive belt and at the same time towards the rotor brake or vice versa. Accordingly, an even faster engagement of the rotor brake and disengagement from the drive belt is possible and/or an simultaneous contact of the spinning rotor shaft with the drive belt and the rotor brake is easily avoided.

    [0029] According to the invention, the rotor brake comprises a brake lever which is pivotally mounted via a pivot axle to the housing, wherein on one side, in particular on one end of the brake lever the braking surface is located and on the other side, in particular on the other end of the brake lever a spring element is provided. Preferably the spring element is arranged between the brake lever and the housing to apply force to the brake lever towards an engaged position, where the rotor brake is engaged and/or where the braking surface is brought in contact with the spinning rotor shaft or a belt roller. The spring element preferentially preloads the brake lever towards the position of a brake engagement. The spring element might be attached to the brake lever in any possible way. It is preferred that the spring element is in particular supported at one end against the brake lever and/or at the other end against the housing, in particular the first part of the housing.

    [0030] The brake lever might have any shape and size. According to the invention, the brake lever is divided into two sides by the pivot axle, the first side being an actuation side and the second side being a braking side. On the braking side the braking surface is provided and on the actuation side at least the spring element is arranged. It is further preferred that the lever has an L-shape and/or two sections which are arranged approximately perpendicular to one another. More preferably, the pivot axle is arranged on the longer side of the L-shaped lever, in particular approximately in the middle of this longer side. Also preferably, the short side of the L-shaped lever is pushed by the housing when the spinning rotor assembly is moved from the first to the second position leading to an engagement of the rotor brake. Advantageously, the longer side of the L-shaped lever and/or the side of the lever comprising the braking surface is arranged in parallel to the spinning rotor shaft, at least in an engaged position of the rotor brake. According to the invention, the pivot axle of the brake lever and the pivoting axis of the two parts of the housing are arranged in parallel and can be at a distance to one another.

    [0031] To improve the longevity and to facilitate the maintenance of the spinning rotor assembly, a brake pad is preferably removably and/or replaceably mounted on an end of the brake lever to provide the braking surface. Such an embodiment advantageously allows to easily replace the part of the rotor brake with the braking surface. The braking pad might be made of any material and might have any shape. Preferably, the braking pad provides the entire braking surface. Also preferably, the brake pad is made of a material which is softer than the surface of the spinning rotor shaft or of the drive roller the brake pad is interacting with when the rotor brake is engaged. Most preferably, the brake pad is made out of a polymer. Although the brake pad might also be an integral part of the brake lever, preferably the brake pad is a separate part and can be fixed to brake lever. Most preferably, a brake pad holder is provided on the braking side of the lever to receive and hold the braking pad firmly in position.

    [0032] According to a preferential embodiment of the spinning rotor assembly, a contact element is arranged on the brake lever to be pressed against a surface of a non-pivotable girder of the rotor spinning machine in the closed position of the spinning rotor assembly to hold the rotor brake in an unengaged position, wherein the contact element and the surface of the girder loose contact when the brake lever is pivoted together with the spinning rotor assembly from the first, closed position into the second, open position so that the rotor brake is automatically engaged. It is further preferred that the brake lever and in particular the contact element looses contact to the girder, when the spinning rotor assembly is moved into the second, open position, and accordingly the rotor brake is engaged. Preferentially, the contact element pressed against a contact point on the surface of the girder stops the rotor brake and in particular the braking surface from contacting the spinning rotor shaft or the belt roller in the closed position of the spinning rotor assembly. It is also preferred that the contact element is arranged on an opposite side of the brake lever to the brake surface and/or on the same side as the spring element. Advantageously, the contact element is aligned perpendicular to the braking surface. The girder may be any part of the frame or of a housing of the spinbox or of the rotor spinning machine which is arranged non-pivotable relative to the ground the rotor spinning machine is positioned on.

    [0033] To be able to adjust the position and/or the timing of the brake engagement when moving the spinning rotor assembly from the first to the second position, according to a preferred embodiment of the spinning rotor assembly the contact element is arranged adjustably, in particular longitudinally adjustable by a threaded connection to the brake lever. Such an arrangement allows to adjust the engagement of the rotor brake dependent on the pivoting angle of the spinning rotor assembly and/or to adjust the distance of the disengaged brake surface from the spinning rotor shaft or of the belt roller in the closed position.

    [0034] It is additionally preferred that a stop element is arranged on the housing of the spinning rotor assembly or on the girder to provide a stop point for the housing tilted into the open position. Preferably, the stop point is located on a part of the girder opposite to the contact point on the girder. Accordingly, the housing of the spinning rotor assembly is preferably arranged in an area between the stop point and the contact point. Most preferably, the stop point and the contact point are arranged on one single girder and/or both points are arranged in one plane.

    [0035] In an advantageous embodiment of the spinning rotor assembly, the spring element is adjustably mounted to the brake lever to adjust the force, the braking surface of the brake lever or the brake pad is applying to the surface of the spinning rotor shaft or of the belt roller. More preferably, the spring element is longitudinally adjustable by a threaded connection allowing a continuous adjustment.

    [0036] Finally, it is also preferred that a control element is provided to allow an engagement of the rotor brake in the closed position of the spinning rotor assembly additional to the automatic rotor brake engagement when moving the spinning rotor assembly out of the closed and/or into the opened position, which also allows to brake the spinning rotor in the first position of the spinning rotor assembly, for example to avoid strong forces from action on the at least one bearing unit, to clean the spinning rotor by strongly braking or to shut down the spinning machine as fast as possible. It is especially preferred that additional to the automatic engagement mode of the rotor brake a manual mode is provided which allows an operator or a control unit of the rotor spinning machine to brake the spinning rotor, especially also in the first position of the spinning rotor assembly.

    [0037] These and other aspects of the invention will be apparent from and elucidated with reference to an embodiment described hereinafter.
    Fig. 1
    shows a perspective view of a rotor assembly including a spinning rotor, a housing and a rotor brake; and
    Fig. 2
    shows a perspective, partially transparent view of the rotor assembly shown in fig-ure 1, and
    Fig. 3
    shows a sectional view of the rotor brake of the rotor assembly shown in figure 1.


    [0038] A spinning rotor assembly 1 as shown in figure 1 comprises a spinning rotor 2 mounted to a spinning rotor shaft 3. The spinning rotor 2 is arranged in a housing 4 to protect an operator of an open-end rotor spinning machine comprising several spinboxes each with one spinning rotor assembly 1. To rotatably mount the spinning rotor 2 to the housing 4, the spinning rotor shaft 3 is arranged to the housing via two bearing units 5 (see figure 2).

    [0039] To access the spinning rotor 2, the spinning rotor assembly 1 can be pivoted from a first closed position for spinning to a second, open position. Accordingly, the housing 4 comprises pivoting joints 7 to provide means for mounting the spinning rotor assembly 1 pivotally about a pivoting axis.

    [0040] However, before an operator can access the spinning rotor 2 after pivoting the spinning rotor assembly 1 into the open position, the spinning rotor 2 has to be braked from a rotational speed of over 100,000 rpm during operation to a complete halt. Accordingly, a rotor brake 6 is provided. The rotor brake 6 comprises a brake lever 11 pivotably mounted with a pivot axle 12 to the housing 4 of the spinning rotor assembly 1.

    [0041] The pivot axle 12 of the brake lever 11 is arranged parallel to the pivoting joint 7 on the housing 4 of the spinning rotor assembly 1 and perpendicular to the rotational axis of the spinning rotor shaft 3. A spring element 13 is arranged between the brake lever 11 and the housing 4 on one side of the pivot axle 12. The spring element 13 is preloading the brake lever 11 towards an engaged position of the rotor brake 6. On the opposite side of the pivot axle 12 of the brake lever 11, a brake pad 14 is arranged at an end of the brake lever 11, wherein the brake pad 14 comprises a braking surface 8 to be brought in direct contact to a surface 9 of the spinning rotor shaft 3 (see figure 3). Accordingly, the rotor brake 6 is operated by a mechanical contact and in particular by friction between the surface of the brake pad 14 and the surface 9 of the spinning rotor shaft 3.

    [0042] The brake pad 14 engages the surface 9 of the spinning rotor shaft 3 in a position directly opposite to the position where a surface 9 of the spinning rotor shaft 3 is driven by a drive belt 10 to accelerate and to drive the spinning rotor 2 via the spinning rotor shaft 3.

    [0043] To automatically engage the rotor brake 6 when pivoting the spinning rotor assembly 1 into the second, open position and to hold the rotor brake 6 in an disengaged position when the spinning rotor assembly 1 is in a first, closed position, on the side of the brake lever 11 also comprising the spring element 13 the end of the brake lever 11 is angled by 90°, wherein this angled section comprises a contact element 15. In the first, closed position of the spinning rotor assembly 1, the contact element 15 is in contact with a surface of a girder 16 of the rotor spinning machine, holding the rotor brake 6 against the force of the spring element 13 in a disengaged position. As soon as the spinning rotor assembly 1 is pivoted towards the second, open position, the contact element 15 looses the contact to the surface of the girder 16 and the spring element 13 forces the rotor brake 6 into the engaged position. Simultaneously, the spinning rotor shaft 3 looses contact to the drive belt 10.

    [0044] As long as the spinning rotor assembly 1 remains in the second, open position, the rotor brake 6 stays engaged and at the same time the drive belt 10 remains contactless from the surface 9 of the spinning rotor shaft 3. Only when the spinning rotor assembly 1 is pivoted into the first, closed position again, the contact element 15 on the brake lever 11 comes into contact with the girder 16 again, releasing the brake. At the same time, the surface 9 of the spinning rotor shaft 3 comes into contact with the drive belt 10, which accelerates the spinning rotor 2 to the operation speed again.

    List of reference signs



    [0045] 
    1
    Spinning rotor assembly
    2
    spinning rotor
    3
    spinning rotor shaft
    4
    housing
    5
    bearing unit
    6
    rotor brake
    7
    pivoting joint
    8
    braking surface
    9
    surface of spinning rotor shaft
    10
    drive belt
    11
    brake lever
    12
    pivot axle
    13
    spring element
    14
    brake pad
    15
    contact element
    16
    girder



    Claims

    1. Spinning rotor assembly (1) for a rotor spinning machine, comprising

    - a spinning rotor (2) fixed to a spinning rotor shaft (3), the spinning rotor shaft (3) being rotatably mounted to a housing (4) of the spinning rotor assembly (1) by at least one bearing unit (5), wherein the housing (4) has two parts pivotably mounted to one another, wherein the first part is fixed to the at least one bearing unit (5) and the second part is arranged pivotally relative to the spinning rotor (2),

    - wherein the spinning rotor assembly (1) is pivotally mounted about a pivoting joint (7) between a first, closed position for operating the spinning rotor (2) and a second open position, where the spinning rotor (2) is accessible, wherein in the first position, the first and second part of the housing (4) are in contact to form a closed housing (4), wherein in the second position, the first and second part of the housing (4) are not in contact to provide an opening to access the spinning rotor (2),

    - wherein a rotor brake (6) for braking the spinning rotor (2) is pivotally mounted to the housing (4), so that the rotor brake (6) is built to automatically engage when the spinning rotor assembly (1) is moved from the first to the second position and to be automatically released when the spinning rotor assembly (1) reaches the closed position,

    - wherein the rotor brake (6) comprises a brake lever (11) pivotally mounted via a pivot axle (12) to the housing (4), wherein on one side of the brake lever (11) the braking surface (8) is located and on the other side of the brake lever (11), a spring element (13) is provided to apply force to the brake lever (11) towards an engaged position of the rotor brake (6),

    characterized in that
    the brake lever (11) is divided into two sides by the pivot axle (12), the first side being an actuation side on which the spring element (13) is arranged and the second side being a braking side on which the braking surface (8) is provided, wherein the pivot axle (12) of the brake lever (11) and the pivoting axis of the two housing parts are arranged in parallel.
     
    2. Spinning rotor assembly according to claim 1, characterized in that the rotor brake (6) is built to be permanently engaged in the open position of the spinning rotor assembly (1).
     
    3. Spinning rotor assembly according to at least one of the proceeding claims, characterized in that the rotor brake (6) is built entirely from mechanical parts, without an electric control and without electric actuators.
     
    4. Spinning rotor assembly according to at least one of the proceeding claims, characterized in that the rotor brake (6) is driven towards an engaged position solely by spring force.
     
    5. Spinning rotor assembly according to at least one of the proceeding claims, characterized in that the rotor brake (6) comprises a braking surface (8) which is pressed by spring force against the spinning rotor shaft (3) when the rotor brake (6) is engaged.
     
    6. Spinning rotor assembly according to at least one of the proceeding claims, characterized in that the rotor brake (6) is pressed against the surface (9) of the spinning rotor shaft (3) on an opposite side to a side of the spinning rotor shaft (3) or of a belt roller to be brought in contact with a drive belt (10).
     
    7. Spinning rotor assembly according to at least one of the proceeding claims, characterized in that a brake pad (14) is mounted on an end of the brake lever (11) to provide the braking surface (8).
     
    8. Spinning rotor assembly according to at least one of the proceeding claims, characterized in that a contact element (15) is arranged on the brake lever (11) to be pressed against a surface of a non-pivotable girder (16) in the closed position of the spinning rotor assembly (1) to hold the rotor brake (6) in an unengaged position, wherein the contact element (15) and the surface of the girder (16) loose contact when the brake lever (11) is pivoted together with the spinning rotor assembly (1) from the first, closed position into the second, open position so that the rotor brake (6) is automatically engaged.
     
    9. Spinning rotor assembly according to at least one of the proceeding claims, characterized in that the contact element (15) is arranged longitudinally adjustable by a threaded connection to the brake lever (11) to adjust the engagement of the rotor brake (6) depending on the pivoting angle of the spinning rotor assembly (1) and/or depending on the distance of the disengaged braking surface (8) from the spinning rotor shaft (3) in the closed position.
     
    10. Spinning rotor assembly according to at least one of the proceeding claims, characterized in that the spring element (13) is adjustably mounted to the brake lever (11) to adjust length of the spring element (13) and/or of the force the braking surface (8) is applying to the surface (9) of the spinning rotor shaft (3).
     
    11. Spinning rotor assembly according to at least one of the proceeding claims, characterized in that a control element is provided to allow an engagement of the rotor brake (6) in the closed position of the spinning rotor assembly (1) additional to the automatic rotor brake engagement when moving the spinning rotor assembly (1) out of the closed and/or into the opened position.
     
    12. Rotor spinning machine with a spinning rotor assembly (1) according to at least one of the claims 1 - 11.
     


    Ansprüche

    1. Spinnrotoranordnung (1) für eine Rotorspinnmaschine, umfassend

    - einen Spinnrotor (2), der an einer Spinnrotorwelle (3) befestigt ist, wobei die Spinnrotorwelle (3) an einem Gehäuse (4) der Spinnrotoranordnung (1) durch mindestens eine Lagereinheit (5) drehbar angebracht ist, wobei das Gehäuse (4) zwei Teile aufweist, die aneinander schwenkbar angebracht sind, wobei der erste Teil an der mindestens einen Lagereinheit (5) befestigt ist und der zweite Teil relativ zu dem Spinnrotor (2) schwenkbar angeordnet ist,

    - wobei die Spinnrotoranordnung (1) um ein Schwenkgelenk (7) zwischen einer ersten, geschlossenen Position zum Betreiben des Spinnrotors (2) und einer zweiten, offenen Position, in der der Spinnrotor (2) zugänglich ist, schwenkbar angebracht ist, wobei in der ersten Position der erste und der zweite Teil des Gehäuses (4) in Kontakt sind, um ein geschlossenes Gehäuse (4) auszubilden, wobei in der zweiten Position der erste und der zweite Teil des Gehäuses (4) nicht in Kontakt sind, um eine Öffnung bereitzustellen, um auf den Spinnrotor (2) zuzugreifen,

    - wobei eine Rotorbremse (6) zum Bremsen des Spinnrotors (2) schwenkbar an dem Gehäuse (4) angebracht ist, so dass die Rotorbremse (6) gebaut ist, um automatisch einzugreifen, wenn die Spinnrotoranordnung (1) von der ersten in die zweite Position bewegt wird, und um automatisch gelöst zu werden, wenn die Spinnrotoranordnung (1) die geschlossene Position erreicht,

    - wobei die Rotorbremse (6) einen Bremshebel (11) umfasst, der über eine Schwenkachse (12) an dem Gehäuse (4) schwenkbar angebracht ist, wobei sich auf einer Seite des Bremshebels (11) die Bremsoberfläche (8) befindet und auf der anderen Seite des Bremshebels (11) ein Federelement (13) bereitgestellt ist, um Kraft auf den Bremshebel (11) in Richtung einer Eingriffsposition der Rotorbremse (6) auszuüben,

    dadurch gekennzeichnet, dass
    der Bremshebel (11) durch die Schwenkachse (12) in zwei Seiten geteilt ist, wobei die erste Seite eine Betätigungsseite ist, auf der das Federelement (13) angeordnet ist und die zweite Seite eine Bremsseite ist, auf der die Bremsoberfläche (8) bereitgestellt ist, wobei die Schwenkachse (12) des Bremshebels (11) und die Schwenkachse der zwei Gehäuseteile parallel angeordnet sind.
     
    2. Spinnrotoranordnung nach Anspruch 1, dadurch gekennzeichnet, dass die Rotorbremse (6) gebaut ist, um in der offenen Position der Spinnrotoranordnung (1) permanent in Eingriff zu stehen.
     
    3. Spinnrotoranordnung nach mindestens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Rotorbremse (6) vollständig aus mechanischen Teilen, ohne eine elektrische Steuerung und ohne elektrische Betätigungselemente, gebaut ist.
     
    4. Spinnrotoranordnung nach mindestens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Rotorbremse (6) ausschließlich durch Federkraft in Richtung einer Eingriffsposition getrieben wird.
     
    5. Spinnrotoranordnung nach mindestens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Rotorbremse (6) eine Bremsoberfläche (8) umfasst, die durch Federkraft gegen die Spinnrotorwelle (3) gedrückt wird, wenn die Rotorbremse (6) in Eingriff steht.
     
    6. Spinnrotoranordnung nach mindestens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass die Rotorbremse (6) gegen die Oberfläche (9) der Spinnrotorwelle (3) auf einer gegenüberliegenden Seite zu einer Seite der Spinnrotorwelle (3) oder einer Riemenrolle gedrückt wird, um mit einem Antriebsriemen (10) in Kontakt gebracht zu werden.
     
    7. Spinnrotoranordnung nach mindestens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass ein Bremsbelag (14) an einem Ende des Bremshebels (11) angebracht ist, um die Bremsoberfläche (8) bereitzustellen.
     
    8. Spinnrotoranordnung nach mindestens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass ein Kontaktelement (15) an dem Bremshebel (11) angeordnet ist, um gegen eine Oberfläche eines nicht schwenkbaren Trägers (16) in der geschlossenen Position der Spinnrotoranordnung (1) gedrückt zu werden, um die Rotorbremse (6) in einer nicht eingegriffenen Position zu halten, wobei das Kontaktelement (15) und die Oberfläche des Trägers (16) den Kontakt verlieren, wenn der Bremshebel (11) zusammen mit der Spinnrotoranordnung (1) von der ersten, geschlossenen Position in die zweite, offene Position geschwenkt wird, so dass die Rotorbremse (6) automatisch in Eingriff steht.
     
    9. Spinnrotoranordnung nach mindestens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Kontaktelement (15) durch eine Gewindeverbindung mit dem Bremshebel (11) längseinstellbar angeordnet ist, um den Eingriff der Rotorbremse (6) in Abhängigkeit von dem Schwenkwinkel der Spinnrotoranordnung (1) und/oder in Abhängigkeit von dem Abstand der ausgelösten Bremsoberfläche (8) von der Spinnrotorwelle (3) in der geschlossenen Position einzustellen.
     
    10. Spinnrotoranordnung nach mindestens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass das Federelement (13) an dem Bremshebel (11) einstellbar angebracht ist, um eine Länge des Federelements (13) und/oder die Kraft, die die Bremsoberfläche (8) auf die Oberfläche (9) der Spinnrotorwelle (3) ausübt, einzustellen.
     
    11. Spinnrotoranordnung nach mindestens einem der vorstehenden Ansprüche, dadurch gekennzeichnet, dass ein Steuerelement bereitgestellt ist, um einen Eingriff der Rotorbremse (6) in der geschlossenen Position der Spinnrotoranordnung (1) zusätzlich zu dem automatischen Rotorbremseneingriff zu ermöglichen, wenn die Spinnrotoranordnung (1) aus der geschlossenen und/oder in die geöffnete Position bewegt wird.
     
    12. Rotorspinnmaschine mit einer Spinnrotoranordnung (1) nach mindestens einem der Ansprüche 1 bis 11.
     


    Revendications

    1. Ensemble rotor de filage (1) pour un métier à filer à rotor, comprenant

    - un rotor de filage (2) fixé à un arbre de rotor de filage (3), l'arbre de rotor de filage (3) étant monté de manière rotative sur un boîtier (4) de l'ensemble rotor de filage (1) par au moins une unité de palier (5), dans lequel le boîtier (4) a deux parties montées de manière pivotante l'une sur l'autre, dans lequel la première partie est fixée à l'au moins une unité de palier (5) et la seconde partie est disposée de manière pivotante par rapport au rotor de filage (2),

    - dans lequel l'ensemble rotor de filage (1) est monté de manière pivotante autour d'une articulation pivotante (7) entre une première position fermée pour le fonctionnement du rotor de filage (2) et une seconde position ouverte, où le rotor de filage (2) est accessible, dans lequel, dans la première position, la première et la seconde partie du boîtier (4) sont en contact pour former un boîtier fermé (4), dans lequel, dans la seconde position, la première et la seconde partie du boîtier (4) ne sont pas en contact pour fournir une ouverture pour accéder au rotor de filage (2),

    - dans lequel un frein de rotor (6) destiné à freiner le rotor de filage (2) est monté de manière pivotante sur le boîtier (4), de sorte que le frein de rotor (6) est construit pour entrer en prise automatiquement lorsque l'ensemble rotor de filage (1) est déplacé de la première à la seconde position et pour être automatiquement libéré lorsque l'ensemble rotor de filage (1) atteint la position fermée,

    - dans lequel le frein de rotor (6) comprend un levier de frein (11) monté de manière pivotante sur le boîtier (4) par l'intermédiaire d'un essieu de pivot (12), dans lequel la surface de freinage (8) est située d'un côté du levier de frein (11) et un élément de ressort (13) est prévu de l'autre côté du levier de frein (11) pour appliquer une force au levier de frein (11) vers une position en prise du frein de rotor (6),

    caractérisé en ce que
    le levier de frein (11) est divisé en deux côtés par l'essieu de pivot (12), le premier côté étant un côté d'actionnement sur lequel l'élément de ressort (13) est disposé et le second côté étant un côté de freinage sur lequel la surface de freinage (8) est prévue, dans lequel l'essieu de pivot (12) du levier de frein (11) et l'axe de pivotement des deux parties de boîtier sont disposés en parallèle.
     
    2. Ensemble rotor de filage selon la revendication 1, caractérisé en ce que le frein de rotor (6) est construit pour être en prise de façon permanente dans la position ouverte de l'ensemble rotor de filage (1).
     
    3. Ensemble rotor de filage selon au moins l'une des revendications précédentes, caractérisé en ce que le frein de rotor (6) est construit entièrement à partir de pièces mécaniques, sans commande électrique et sans actionneurs électriques.
     
    4. Ensemble rotor de filage selon au moins l'une des revendications précédentes, caractérisé en ce que le frein de rotor (6) est entraîné vers une position en prise uniquement par la force de ressort.
     
    5. Ensemble rotor de filage selon au moins l'une des revendications précédentes, caractérisé en ce que le frein de rotor (6) comprend une surface de freinage (8) qui est pressée par la force de ressort contre l'arbre de rotor de filage (3) lorsque le frein de rotor (6) est en prise.
     
    6. Ensemble rotor de filage selon au moins l'une des revendications précédentes, caractérisé en ce que le frein de rotor (6) est pressé contre la surface (9) de l'arbre de rotor de filage (3) d'un côté opposé à un côté de l'arbre de rotor de filage (3) ou d'un rouleau de courroie à amener en contact avec une courroie d'entraînement (10).
     
    7. Ensemble rotor de filage selon au moins l'une des revendications précédentes, caractérisé en ce qu'un patin de frein (14) est monté sur une extrémité du levier de frein (11) pour fournir la surface de freinage (8).
     
    8. Ensemble rotor de filage selon au moins l'une des revendications précédentes, caractérisé en ce qu'un élément de contact (15) est disposé sur le levier de frein (11) pour être pressé contre une surface d'une poutre (16) non pivotante dans la position fermée de l'ensemble rotor de filage (1) pour maintenir le frein de rotor (6) dans une position non en prise, dans lequel l'élément de contact (15) et la surface de la poutre (16) perdent le contact lorsque le levier de frein (11) est pivoté conjointement à l'ensemble rotor de filage (1) de la première position fermée à la seconde position ouverte, de sorte que le frein de rotor (6) est automatiquement en prise.
     
    9. Ensemble rotor de filage selon au moins l'une des revendications précédentes, caractérisé en ce que l'élément de contact (15) est disposé longitudinalement ajustable par un raccord fileté au levier de frein (11) pour ajuster la mise en prise du frein de rotor (6) en fonction de l'angle de pivotement de l'ensemble rotor de filage (1) et/ou en fonction de la distance de la surface de freinage (8) désolidarisée par rapport à l'arbre de rotor de filage (3) dans la position fermée.
     
    10. Ensemble rotor de filage selon au moins l'une des revendications précédentes, caractérisé en ce que l'élément ressort (13) est monté de manière ajustable sur le levier de frein (11) pour ajuster la longueur de l'élément ressort (13) et/ou la force que la surface de freinage (8) applique à la surface (9) de l'arbre de rotor de filage (3).
     
    11. Ensemble rotor de filage selon au moins l'une des revendications précédentes, caractérisé en ce qu'un élément de commande est prévu pour permettre une mise en prise du frein de rotor (6) dans la position fermée de l'ensemble rotor de filage (1) en plus de la mise en prise automatique du frein de rotor lors du déplacement de l'ensemble rotor de filage (1) hors de la position fermée et/ou dans la position ouverte.
     
    12. Métier à filer à rotor doté d'un ensemble rotor de filage (1) selon au moins l'une parmi les revendications 1 à 11.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description