[0001] This application claims priorities to Chinese Patent Applications No.
201710852362.7, titled "BOGIE FRAME AND BOGIE HAVING SAME", and No.
201721202610.5, titled "BOGIE FRAME AND BOGIE HAVING SAME", filed on September 19, 2017 with the
Chinese State Intellectual Property Office, the entire disclosures of which are incorporated
herein by reference.
FIELD
[0002] The present application relates to the technical field of bogies, and in particular
to a bogie frame and a bogie provided with the bogie frame.
BACKGROUND
[0003] In rail vehicles, a bogie is an important component. The bogie is a direct receiver
of a traction force, a braking force, a load of a vehicle, and an external force,
and the bogie plays a crucial role in the running quality of the vehicle and the safety
of passenger transportation.
[0004] A cross sill and side sills of a bogie frame are main load-bearing components. The
cross sill is rigidly integrated by welding transversely between the left side sill
and the right side sill. The cross sill may be a round tubular cross sill or a box
cross sill. The box cross sill is formed by welding of sheets. Usually, two round
tubular cross sills are used in parallel in the bogie frame, or one box- cross sill
is used in the bogie frame. The structural strength of the cross sill and the structural
strength of the side sills as well as the connection strength between the cross sill
and the side sills is important for the overall strength of the bogie frame.
[0005] At present, two ends of the box cross sill are typically connected to the side sills
respectively by transitional connection members. This connection has a poor welding
quality, a poor the connection reliability, susceptibility of damage, a difficult
manufacturability, a large space occupation, a large manufacturing workload, and a
difficult installation.
[0006] In addition, a secondary vertical damper in the conventional bogie is generally mounted
between the side sill and a body bolster, moreover, the secondary vertical damper
is located at an outer side of the side sill and far away from the centerline of a
vehicle body. In operation, an up and down stroke, generated due to vibration of the
vehicle body, of the secondary vertical damper is large, which may adversely affect
the service life of the secondary vertical damper and may even cause damage.
[0007] Therefore, a technical issue to be currently addressed by the person skilled in the
art is to overcome the defects of the conventional bogie.
SUMMARY
[0008] In view of this, a bogie frame is provided according to the present application,
which not only facilitates performing the welded connection during assembly and achieves
a highly reliable and highly stable welded connection, but also can provide, at an
inner side region of each of side sills, a sufficient mounting space for other components,
thereby improving the flexibility of design of the bogie frame. A bogie including
the bogie frame described above is further provided according to the present application,
the bogie frame of which not only facilitates performing the welded connection during
assembly and achieves a highly reliable and highly stable welded connection, but also
can provide, at the inner side region of each of the side sills, a sufficient mounting
space for other components, thereby improving the flexibility of design of the bogie
frame.
[0009] Technical solutions are provided according to the present application as follows.
[0010] A bogie frame is provided according to the present application, which includes two
side sills and one cross sill fixedly arranged between the two side sills. Each of
the cross sill and the two side sills is a box beam. The cross sill is in an H-shape.
Each of connection portions of the cross sill at two ends thereof obliquely converges
towards a transverse centerline of the cross sill. An inner side of each of the two
side sills is provided with a socket formed by an upper cover plate and a lower cover
plate of the respective side sill. An upper cover plate of each of the connection
portions of the cross sill is butt joined to a portion, forming part of the socket,
of the upper cover plate of the respective side sill. A lower cover plate of each
of the connection portions of the cross sill is butt joined to a portion, forming
part of the socket, of the lower cover plate of the respective side sill. An outer
side vertical plate of each of the connection portions of the cross sill goes beyond
an end portion of the upper cover plate and an end portion of the lower cover plate
of the cross sill, and is inserted via the respective socket into the respective side
sill to be connected to the respective side sill.
[0011] Preferably, the upper cover plate of the side sill extends inwards at a joint where
the upper cover plate of the side sill is correspondingly connected to the cross sill,
and the lower cover plate of the side sill extends inwards at a joint where the lower
cover plate of the side sill is correspondingly connected to the cross sill, to form
the respective socket corresponding to the respective connection portion of the cross
sill.
[0012] Preferably, an end surface, at a position where the socket is formed, of the upper
cover plate of the side sill is adapted to an end surface of the upper cover plate
of the respective connection portion of the cross sill. An end surface, at a position
where the socket is formed, of the lower cover plate of the side sill is adapted to
an end surface of the lower cover plate of the respective connection portion of the
cross sill.
[0013] Preferably, the outer side vertical plate of each of the connection portions is an
inwardly concaved arc-shaped plate.
[0014] Preferably, the outer side vertical plate of each of the connection portions is formed
by a first straight plate segment, a second straight plate segment and a transitional
arc-shaped plate segment, the first straight plate segment is inserted into the respective
socket, the second straight plate segment extends from a middle portion of the cross
sill and obliquely converges towards the transverse centerline of the cross sill,
and the transitional arc-shaped plate segment is arranged between the first straight
plate segment and the second straight plate segment.
[0015] Preferably, the outer side vertical plate of each of the connection portions of the
cross sill is inserted into the respective side sill via the respective socket, and
then connected by welding to the upper cover plate, the lower cover plate and a vertical
plate of the respective side sill.
[0016] Preferably, the side sill is a U-shaped structural beam with a downwardly concaved
middle portion, and the socket is arranged at the downwardly concaved position of
the side sill.
[0017] Preferably, a secondary vertical damper seat is provided at an outer side of the
outer side vertical plate of each of the connection portions of the cross sill. A
connection portion, for connection to a top portion of a secondary vertical damper,
of a body bolster is provided at a position, right above the secondary vertical damper
seat and corresponding to the secondary vertical damper seat, of the body bolster.
[0018] Preferably, the upper cover plate of each of the connection portions of the cross
sill and a portion, forming part of the socket, of the upper cover plate of the respective
side sill are located in a same plane and butt joined to each other. The lower cover
plate of each of the connection portions of the cross sill and a portion, forming
part of the socket, of the lower cover plate of the respective side sill are located
in a same plane and butt joined to each other.
[0019] A bogie is further provided according to the present application, which includes
a bogie frame. The bogie frame is the bogie frame according to any one of the above
aspects.
[0020] In the bogie according to the present application, the cross sill is directly connected
to the side sills, without requiring to provide the transitional connection members
in the conventional technology, thus, the bogie frame facilitates performing the welded
connection during assembly, and a highly reliable and highly stable welded connection
can be achieved. Since each of the connection portions of the cross sill at the two
ends thereof obliquely converges towards the transverse centerline of the cross sill,
a sufficient mounting space may be provided, at the inner side region of each of the
side sills, for other components, thereby improving the flexibility of design of the
bogie frame. Each of the cross sill and the side sills is provided as a box beam,
which facilitates reduction of the overall weight of the frame and saves the material.
[0021] The bogie frame of the bogie including the bogie frame according to the present application
not only facilitates performing the welded connection during assembly, and achieves
a highly reliable and highly stable welded connection, but also can provide, at the
inner side region of each of the side sills, a sufficient mounting space for other
components, thereby improving the flexibility of design of the bogie frame.
BRIEF DESCRIPTION OF THE DRAWINGS
[0022] For more clearly illustrating embodiments of the present application or the technical
solutions in the conventional technology, drawings referred to describe the embodiments
or the conventional technology will be briefly described hereinafter. The drawings
in the following description are only examples of the present application, and for
the person skilled in the art, other drawings may be obtained based on the provided
drawings without any creative efforts.
Figure 1 is a schematic front view showing the structure of a bogie frame of a motor
unit according to an embodiment of the present application;
Figure 2 is an enlarged view of part A in Figure 1;
Figure 3 is a schematic rear view showing the structure of the bogie frame of the
motor unit according to the embodiment of the present application;
Figure 4 is a top view of the bogie frame of the motor unit according to the embodiment
of the present application;
Figure 5 is a front view of the bogie frame of the motor unit according to the embodiment
of the present application;
Figure 6 is a side view of the bogie frame of the motor unit according to the embodiment
of the present application;
Figure 7 is a schematic view showing the structure of a bogie of the motor unit according
to an embodiment of the present application;
Figure 8 is a schematic front view showing the structure of a bogie frame of a trailer
according to an embodiment of the present application; and
Figure 9 is a schematic view showing the structure of a bogie of the trailer according
to an embodiment of the present application.
Reference Numerals in Figures 1 to 9:
1 cross sill; |
2 side sill; |
21 socket; |
3 secondary vertical damper seat; |
4 body bolster; |
5 secondary vertical damper. |
DETAILED DESCRIPTION OF EMBODIMENTS
[0023] The technical solutions in the embodiments of the present application will be described
clearly and completely hereinafter in conjunction with the drawings in the embodiments
of the present application. The described embodiments are only a part of the embodiments
of the present application, rather than all embodiments. Based on the embodiments
in the present application, all of other embodiments, made by the person skilled in
the art without any creative efforts, fall into the protection scope of the present
application.
[0024] A bogie frame is provided according to an embodiment of the present application,
which not only facilitates fit-up and welding with a high reliability and a good stability,
but also can provide, at an inner side region of each of side sills, a sufficient
mounting space for other components, thereby improving the flexibility of design of
the bogie frame. A bogie including the bogie frame described above is further provided
according to another embodiment of the present application, which not only facilitates
fit-up and welding with a high reliability and a good stability, but also can provide,
at an inner side of each of side sills, a sufficient mounting space for other components,
thereby improving the flexibility of design of the bogie frame.
[0025] Reference is made to Figures 1 to 9. Figure 1 is a schematic front view showing the
structure of a bogie frame of a motor unit according to the present application. Figure
2 is an enlarged view of part A in Figure 1. Figures 3 to 6 are respectively a schematic
rear view showing the structure of the bogie frame of the motor unit according to
the embodiment of the present application, as well as a top view, a front view and
a side view of the bogie frame of the multiple-unit train according to the embodiment
of the present application. Figure 7 is a schematic view showing the structure of
a bogie of the motor unit according to an embodiment of the present application. Figure
8 is a schematic front view showing the structure of a bogie frame of a trailer according
to an embodiment of the present application. Figure 9 is a schematic view showing
the structure of a bogie of the trailer according to an embodiment of the present
application.
[0026] The bogie frame according to an embodiment of the present application includes two
side sills 2 and one cross sill 1 fixedly arranged between the two side sills 2. The
cross sill 1 and the side sills 2 may form an H-shaped structure. Each of the cross
sill 1 and the side sills 2 is a box beam. Each of a peripheral wall of the cross
sill 1 and a peripheral wall of the side sill 2 is formed by an upper cover plate,
a lower cover plate and vertical plates.
[0027] The cross sill 1 is in an H-shape. Each of connection portions of the cross sill
1 at two ends thereof obliquely converges towards a transverse centerline of the cross
sill 1, that is, in a direction of width of the train, each of the two ends of the
cross sill 1 respectively forms two branches for connecting to the respective side
sill 2. Due to the H shape of the cross sill 1, the vertical plates of each of the
two branches of the respective connection portion of the cross sill 1 may include
an inner side vertical plate and an outer side vertical plate, the inner side vertical
plate is arranged close to the transverse centerline of the cross sill 1, and the
outer side vertical plate is arranged away from the transverse centerline of the cross
sill 1. The arrangement of the inner side vertical plate can improve the overall strength
of the bogie frame. Moreover, each of the connection portions of the cross sill 1
and a middle portion of the respective side sill 2 form an opening. A sufficient space
may be provided at the opening so as to weld the inner side vertical plate to the
upper cover plate and the lower cover plate of each of the cross sill 1 and the side
sill 2.
[0028] An inner side of the side sill 2 is provided with a socket 21. The socket 21 is formed
by the upper cover plate and the lower cover plate of the side sill 2. The upper cover
plate of each of the connection portions of the cross sill 1 is butt joined to a portion,
forming part of the socket 21, of the upper cover plate of the respective side sill
2. The lower cover plate of each of the connection portions of the cross sill 1 is
butt joined to a portion, forming part of the socket 21, of the lower cover plate
of the respective side sill 2.
[0029] The outer side vertical plate of each of the connection portions of the cross sill
1 goes beyond an end portion of the upper cover plate and an end portion of the lower
cover plate of the cross sill 1, i.e., the outer side vertical plate of the cross
sill 1 extends beyond the upper cover plate and the lower cover plate of the cross
sill 1 in the width direction of the train. An end portion of the outer side vertical
plate of each of the connection portions of the cross sill 1 is inserted via the respective
socket 21 into the respective side sill 2 to be connected to the respective side sill
2.
[0030] The cross sill 1 may be fixedly connected to the side sills 2 by welding. The cross
sill 1 and the side sills 2 of the bogie frame of the multiple-unit train may be arranged
in the above way, and the cross sill 1 and the side sills 2 of the bogie frame of
the trailer may also be arranged in the above way.
[0031] In this bogie frame, the cross sill 1 is directly connected to the side sills 2,
without requiring to provide transitional connection members in the conventional technology,
thus, the bogie frame facilitates fit-up and welding with a high reliability and a
good stability. Since each of the connection portions of the cross sill 1 at the two
ends thereof obliquely converges towards the transverse centerline of the cross sill
1, a sufficient mounting space may be provided, at an inner side region of each of
the side sills 2, for other components, thereby improving the flexibility of design
of the bogie frame. Each of the cross sill 1 and the side sills 2 is provided as a
box beam, which facilitates reduction of the overall weight of the frame and saves
the material.
[0032] In the above embodiments, the upper cover plate and the lower cover plate of the
side sill 2 extend inwards at a corresponding connection to the cross sill 1, to form
the socket 21 corresponding to the respective connection portions of the cross sill
1. That is, the upper cover plate and the lower cover plate of one side sill 2 forming
the socket 21 extend towards the other side sill 2, thereby facilitating the fit-up
between the cross sill 1 and the side sills 2. Moreover, the extension structure of
the upper cover plate of the side sills 2 for connecting to the cross sill 1 may prevent
the cross sill 1 from occupying a space, used for connection to other components,
of the side sill 2, and thus may prevent other parts of the side sill 2 from interfering
in the fit-up process.
[0033] In the above embodiments, an end surface, at a position where the socket 21 is formed,
of the upper cover plate of each of the side sills 2 is adaptive to an end surface
of the upper cover plate of the corresponding connection portion of the cross sill
1, and an end surface, at a position where the socket 21 is formed, of the lower cover
plate of each of the side sills 2 is adaptive to an end surface of the lower cover
plate of the corresponding connection portion of the cross sill 1. "Adaptive" means
that the end surfaces have corresponding shapes and may be completely and seamlessly
jointed to each other. By taking the end surfaces of the upper cover plate and the
lower cover plate of each of the connection portions of the cross sill 1 being flat
surfaces as an example, the end faces at the portions, where the socket 21 is formed,
of the upper cover plate and the lower cover plate of each of the side sills 2 are
also flat surfaces with the same areas and corresponding shapes and inclination angles.
This arrangement may ensure that the edge of the joints of the transverse sill 1 and
the side sills 2 are smooth, the connection is reliable, and may facilitate material
saving.
[0034] In the above embodiments, the outer side vertical plate of each of the connection
portions may be an inwardly concaved arc-shaped plate. "Inwardly concaved" refers
to being concaved toward the transverse centerline of the cross sill 1, so as to further
expand an available space in the bogie frame, to reduce the stress concentration at
the joints of the cross sill 1 to the side sills 2, and to improve the connection
strength. Each of the connection portions of the cross sill 1 may be designed with
a variable cross section, so as to reduce the stress concentration at the joints of
the cross sill 1 to the side sills 2.
[0035] Alternatively, the outer side vertical plate of the connection portion may be formed
by a first straight plate segment, a second straight plate segment and a transitional
arc-shaped plate segment. The first straight plate segment is inserted into the corresponding
socket 21. The second straight plate segment extends from a middle portion of the
cross sill 1 and obliquely converges towards the transverse centerline of the cross
sill 1. The transitional arc-shaped plate segment is arranged between the first straight
plate segment and the second straight plate segment. That is, the outer side vertical
plate of each of the connection portions of the cross sill 1 includes the second straight
plate segment, the transitional arc-shaped plate segment and the first straight plate
segment in the listed sequence from the middle portion to an outer side of the cross
sill 1 in the width direction of the train. This arrangement is convenient to manufacture.
In particular, providing a portion, inserted into the side sill 2 as a straight plate
shape may facilitate determination of the orientation of connection.
[0036] Specifically, the outer side vertical plate of each of the connection portions of
the cross sill 1 may be an integrally formed component including three segments, i.e.,
the second straight plate segment, the transitional arc-shaped plate segment and the
first straight plate segment. Alternatively, the outer side vertical plate of each
of the connection portions of the cross sill 1 may be formed by sequence welding.
[0037] In the above embodiments, the outer side vertical plate of each of the connection
portions of the cross sill 1 may be inserted into a corresponding side sill 2 via
a corresponding socket 21, and then connected by welding to the upper cover plate,
the lower cover plate and the vertical plate of the side sill 2, so as to ensure the
reliability of connection between the cross sill 1 and the side sill 2. A distance
by which the outer side vertical plate of each of the connection portions of the cross
sill 1 is inserted into the side sill 2 may be determined in other way in practice.
[0038] In the above embodiments, the side sill 2 may be a U-shaped structural beam with
a downwardly concaved middle portion, and the downwardly concaved structure may provide
a mounting space for the components and parts. The socket 21 may be arranged at a
downwardly concaved position of the side sill 2. This arrangement may ensure the overall
strength of the bogie frame, and may increase the length of each of the joints of
the cross sill 1 to the side sills 2 in a length direction of the train as long as
possible, thereby ensuring the area of connection of the cross sill 1 to the side
sills 2.
[0039] In the above embodiments, a secondary vertical damper seat 3 is provided at an outer
side of the outer side vertical plate of each of the connection portions of the cross
sill 1, and a connection portion, for connection to a top portion of a secondary vertical
damper 5, of a body bolster 4 may be provided at a position, right above the secondary
vertical damper seat 3 and corresponding to the secondary vertical damper seat 3,
of the body bolster 4. This arrangement can allow the available space in the bogie
frame to be sufficiently used while ensuring the damping effect, thereby reducing
a stroke of the secondary vertical damper 5 generated by the rotation of the motor
unit. Specifically, the two ends of the cross sill 1 in the width direction of the
motor unit each may be provided with one secondary vertical damper seat 3.
[0040] In the above embodiments, each of the cross sill 1 and the side sill 2 may specifically
be formed by castings which are fit up and welded to one another. A certain number
of partition plates may be provided in the cross sill 1 and the side sill 2 as required,
so as to further improve the torsional strength of the frame. In addition, the partition
plate may be provided with a weight reduction hole, so as to reduce the overall weight
of the bogie frame as much as possible and save the material while meeting a strength
requirement of the bogie frame.
[0041] In the above embodiments, the upper cover plate of each of the connection portions
of the cross sill 1 and a portion, forming part of the socket 21, of the upper cover
plate of the corresponding side sill 2 may be located in a same plane and butt jointed
to each other. The lower cover plate of each of the connection portions of the cross
sill 1 and a portion, forming part of the socket 21, of the lower cover plate of the
corresponding side sill 2 may be located in a same plane and butt jointed to each
other. Each of connection positions where the cross sill 1 is connected to the side
sills 2 is located in a plane, which may provide convenience for arranging other components
on the connection position. Of course, the upper cover plate of each of the connection
portions of the cross sill 1 may alternatively have a certain height difference from
the portion, forming part of the socket 21, of the upper cover plate of the corresponding
side sill 2, and the lower cover plate of each of the connection portions of the cross
sill 1 may alternatively have a certain height difference from the portion, forming
part of the socket 21, of the lower cover plate of the corresponding side sill 2.
[0042] In addition to the bogie frame described above, a bogie including the bogie frame
is further provided according to the embodiments of the present application, the bogie
frame not only facilitates fit-up and welding with a high reliability and a good stability,
but also can provide, at the inner side region of each of the side sills, a sufficient
mounting space for other components, thereby improving the flexibility of design of
the bogie frame. Reference may be made to the conventional technology for the structures
of other parts of the bogie, which will not be described herein.
[0043] The above embodiments in this specification are described in a progressive manner.
Each of the embodiments is mainly focused on describing its differences from other
embodiments, and references may be made among these embodiments with respect to the
same or similar portions among these embodiments.
[0044] The above explanation of the disclosed embodiments enables the person skilled in
the art to implement or use the present application. It is apparent for the person
skilled in the art to make multiple modifications to these embodiments. The general
principles defined herein may be implemented in other embodiments without departing
from the technical solution or scope of the present application. Therefore, the present
application is not limited to these embodiments illustrated herein, and should conform
to a broadest scope in consistent with the principles and novel features disclosed
herein.
1. A bogie frame, comprising:
two side sills (2); and
one cross sill (1) fixedly arranged between the two side sills (2),
wherein each of the cross sill (1) and the two side sills (2) is a box beam, the cross
sill (1) is in an H-shape, and each of connection portions of the cross sill (1) at
two ends thereof obliquely converges towards a transverse centerline of the cross
sill (1); an inner side of each of the two side sills (2) is provided with a socket
(21) formed by an upper cover plate and a lower cover plate of the respective side
sill (2);
wherein an upper cover plate of each of the connection portions of the cross sill
(1) is butt jointed to a portion, forming the socket (21), of the upper cover plate
of the corresponding side sill (2), and a lower cover plate of each of the connection
portions of the cross sill (1) is butt joined to a portion, forming the socket (21),
of the lower cover plate of the corresponding side sill (2);
wherein an outer side vertical plate of each of the connection portions of the cross
sill (1) goes beyond an end portion of the upper cover plate and an end portion of
the lower cover plate of the cross sill (1), and is inserted via the corresponding
socket (21) into the respective side sill (2) to be connected to the respective side
sill (2).
2. The bogie frame according to claim 1, wherein the upper cover plate and the lower
cover plate of the side sill (2) extends inwards at a corresponding connection to
the cross sill (1), to form the socket (21) corresponding to the connection portions
of the cross sill (1).
3. The bogie frame according to claim 2, wherein an end surface, at a position where
the socket (21) is formed, of the upper cover plate of each of the side sills (2)
the is adaptive to an end surface of the upper cover plate of the corresponding connection
portion of the cross sill (1), and an end surface, at a position where the socket
(21) is formed, of the lower cover plate of each of the side sills (2) is adaptive
to an end surface of the lower cover plate of the corresponding connection portion
of the cross sill (1).
4. The bogie frame according to claim 3, wherein the outer side vertical plate of each
of the connection portions is an inwardly concaved arc-shaped plate.
5. The bogie frame according to claim 3, wherein the outer side vertical plate of each
of the connection portions is formed by a first straight plate segment, a second straight
plate segment and a transitional arc-shaped plate segment, wherein the first straight
plate segment is inserted into the socket (21), the second straight plate segment
extends from a middle portion of the cross sill (1) and obliquely converges towards
the transverse centerline of the cross sill (1), and the transitional arc-shaped plate
segment is arranged between the first straight plate segment and the second straight
plate segment.
6. The bogie frame according to claim 1, wherein the outer side vertical plate of each
of the connection portions of the cross sill (1) is inserted into the corresponding
side sill (2) via the socket (21), and is connected by welding to the upper cover
plate, the lower cover plate and a vertical plate of each of the corresponding side
sill (2).
7. The bogie frame according to claim 1, wherein each of the side sills (2) is a U-shaped
structural beam with a downwardly concaved middle portion, and the socket (21) is
arranged at a downwardly concaved position of each of the side sills (2).
8. The bogie frame according to any one of claims 1 to 7, wherein a secondary vertical
damper seat (3) is provided at an outer side of the outer side vertical plate of each
of the connection portions of the cross sill (1), and a connection portion, for connection
to a top portion of a secondary vertical damper (5), of a body bolster (4) is provided
at a position, right above the secondary vertical damper seat (3) and corresponding
to the secondary vertical damper seat (3), of the body bolster (4).
9. The bogie frame according to any one of claims 1 to 7, wherein the upper cover plate
of each of the connection portions of the cross sill (1) and a portion, forming the
socket (21), of the upper cover plate of the respective side sill (2) are located
in a same plane and butt jointed to each other; and the lower cover plate of each
of the connection portions of the cross sill (1) and a portion, forming the socket
(21), of the lower cover plate of the corresponding side sill (2) are located in a
same plane and butt jointed to each other.
10. A bogie, comprising a bogie frame, wherein the bogie frame is the bogie frame according
to any one of claims 1 to 9.