CN111994121B - Bogie and rail vehicle - Google Patents
Bogie and rail vehicle Download PDFInfo
- Publication number
- CN111994121B CN111994121B CN202010820705.3A CN202010820705A CN111994121B CN 111994121 B CN111994121 B CN 111994121B CN 202010820705 A CN202010820705 A CN 202010820705A CN 111994121 B CN111994121 B CN 111994121B
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- cross beam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/50—Other details
- B61F5/52—Bogie frames
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- Mechanical Engineering (AREA)
- Vibration Dampers (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The embodiment of the application provides a bogie and rail vehicle, includes: two side beams arranged in parallel, the side beams extending in a first direction; a cross beam mounting hole is formed in the middle of the side beam and is a through hole, the center line of the cross beam mounting hole extends along a second direction, and the second direction is perpendicular to the first direction; the cross beam extends along the second direction, two ends of the cross beam respectively penetrate through the cross beam mounting holes in the two side beams, and the cross beam and the side beams can generate relative displacement along the second direction; the length of the cross beam is greater than the distance between the outer side surfaces of the two side beams; the longitudinal beam is positioned on the inner side of the side beam and fixed on the cross beam; the stop plate is positioned on the outer side of the side beam and fixed on the cross beam; the transverse distance between the stop plate and the longitudinal beam is greater than the transverse width of the side beam. The bogie and the railway vehicle provided by the embodiment of the application can pass through a curve with a smaller curvature radius.
Description
Technical Field
The application relates to a bogie structure technology, in particular to a bogie and a rail vehicle.
Background
The rail vehicle is an important traffic tie connecting cities, is gradually a main vehicle in the cities, and is also a main carrier for realizing goods transportation. The rail vehicle mainly comprises a vehicle body and a bogie arranged below the vehicle body, wherein the bogie is used for bearing the vehicle body and realizing walking and steering functions.
Conventional bogies mainly include a frame, wheel sets, traction devices, braking devices, primary and secondary suspensions. The framework is a main framework of the bogie, and other parts are all arranged on the framework, so that the framework has high strength and stability. The framework includes: the frame is generally fixedly connected to the side members by two parallel side members and a cross member connected between the two side members. During the process of the vehicle passing through a curve, relative transverse movement is generated between the vehicle body and the bogie, and the transverse movement is realized through the cooperation between the secondary suspension, the traction device and the cross beam.
Disclosure of Invention
In order to solve one of the technical defects, the embodiment of the application provides a bogie and a railway vehicle.
An embodiment of a first aspect of the present application provides a bogie, including:
two side beams arranged in parallel, the side beams extending in a first direction; a cross beam mounting hole is formed in the middle of the side beam and is a through hole, the center line of the cross beam mounting hole extends along a second direction, and the second direction is perpendicular to the first direction;
the cross beam extends along the second direction, two ends of the cross beam respectively penetrate through the cross beam mounting holes in the two side beams, and the cross beam and the side beams can generate relative displacement along the second direction; the length of the cross beam is greater than the distance between the outer side surfaces of the two side beams;
the longitudinal beam is positioned on the inner side of the side beam and fixed on the cross beam;
the stop plate is positioned on the outer side of the side beam and fixed on the cross beam; the transverse distance between the stop plate and the longitudinal beam is greater than the transverse width of the side beam.
An embodiment of a second aspect of the present application provides a rail vehicle, including: a bogie as described above.
The technical scheme that this application embodiment provided, adopt two curb girders that extend along longitudinal direction and the crossbeam that extends along transverse direction, the crossbeam mounting hole that sets up in the curb girder middle part is passed at the both ends of crossbeam, make and to produce horizontal relative movement between crossbeam and the curb girder, adopt longitudinal beam and backstop board to lie in the both sides of curb girder and the crossbeam links to each other and is used for restricting the relative displacement between crossbeam and the curb girder at predetermineeing the within range, operation safety has been guaranteed, also make the bogie can satisfy the requirement that the curve of less curvature radius passes through, improve rail vehicle's turn performance and security.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a perspective view of a bogie provided in an embodiment of the present application;
FIG. 2 is a side view of a truck provided in an embodiment of the present application;
FIG. 3 is a side view of a side sill of a truck according to an embodiment of the present application;
FIG. 4 is an exploded view of the assembly of a side sill and a cross rail of a truck according to an embodiment of the present application;
FIG. 5 is a schematic structural view of a side rail, a cross rail and a secondary assembly of the bogie provided by the embodiment of the application;
FIG. 6 is a top view of the side rail, cross rail and secondary assembly of the truck according to an embodiment of the present application;
FIG. 7 is a cross-sectional view of the truck with the cross member and the side member relatively moved to a first extreme position in accordance with an embodiment of the present application;
fig. 8 is a cross-sectional view of a cross member and a side member of the bogie according to the embodiment of the present application, which are relatively moved to a second limit position.
Reference numerals:
1-a side beam; 11-beam mounting holes;
2-a cross beam; 21-a beam main body section; 22-beam mating section;
3-longitudinal beam;
4-wheel pair;
5-a stopper plate;
61-series support plate; 62-a spring assembly;
7-a traction device.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment provides a bogie, which can be applied to a rail vehicle, wherein the rail vehicle can be a diesel locomotive or an electric locomotive, can be a motor train unit, a subway, a light rail or a tramcar, and can also be other engineering rail vehicles. The bogie can adapt to a curved path with a smaller curvature radius.
Fig. 1 is a perspective view of a bogie provided in an embodiment of the present application, and fig. 2 is a side view of the bogie provided in an embodiment of the present application. As shown in fig. 1 and 2, the present embodiment provides a bogie including: side beams 1, cross beams 2, longitudinal beams 3, wheel sets 4 and stop plates 5.
The side members 1 are arranged in parallel and extend in a first direction, which is a longitudinal direction, i.e., a horizontal direction that is the same as a traveling direction of the rail vehicle. A cross beam mounting hole is formed in the middle of each side beam 1, the cross beam mounting hole is a through hole, the center line of the cross beam mounting hole extends along a second direction, and the second direction is a transverse direction, namely a horizontal direction perpendicular to the traveling direction of the rail vehicle.
The cross beam 2 extends along the transverse direction, two ends of the cross beam 2 respectively penetrate through the side beam mounting holes in the two side beams 1, and relative displacement can be generated between the cross beam 2 and the side beams 1 along the transverse direction. The cross member 2 has a length greater than the distance between the outer side surfaces of the two side members 1. The longitudinal beam 3 and the stop plates 5 are respectively positioned at two sides of the side beam 1, fixed on the cross beam 2 and used for limiting the relative displacement between the cross beam 2 and the side beam 1 within a preset range.
The mode that the cross beam is fixedly connected with the side beam in the traditional scheme is abandoned, and the cross beam 2 and the side beam 1 in the embodiment can move relatively in the transverse direction. The longitudinal beam 3 and the stopper plate 5 are used to limit the amount of lateral movement within a preset range.
The bogie further comprises wheel pairs 4 arranged at two ends of the side beams 1, and wheels in the wheel pairs 4 run along the rails.
In addition, the cross beam 2 can be connected with the vehicle body into a whole through the traction device 7, when the rail vehicle passes through a curve, the side beam 1 moves along the rail along with wheels, and the vehicle body, the traction device and the cross beam 2 generate a certain amount of transverse deviation with the side beam 1, so that the curve passing requirement with a small curvature radius can be met.
According to the technical scheme, the two side beams extending along the longitudinal direction and the cross beam extending along the transverse direction are adopted, two ends of the cross beam penetrate through the cross beam mounting holes formed in the middle of the side beams, so that the cross beam and the side beams can transversely move relatively, the longitudinal beams and the stop plates are positioned on two sides of the side beams and connected with the cross beam to limit the relative displacement between the cross beam and the side beams within a preset range, the operation safety is guaranteed, the bogie can meet the requirement of passing a curve with a small curvature radius, and the turning performance and the safety of the railway vehicle are improved.
On the basis of the above technical solution, the present embodiment provides a specific implementation manner of a bogie: as shown in fig. 1 and 2, two box-shaped side beams 1 are arranged in parallel, two cross beams 2 are arranged between the middle parts of the two side beams 1, and the two cross beams 2 and the side beams 1 can generate relative transverse movement. A preset distance is left between the two cross beams 2.
Fig. 3 is a side view of a side sill in a bogie provided in an embodiment of the present application. As shown in fig. 3, the side member 1 is a box-shaped member having two high ends and a low middle portion, and is formed by welding a top plate, a bottom plate, and side plates. The top plate, the bottom plate and the side plates can be steel plates. Two cross beam mounting holes 11 are symmetrically arranged in the middle of the side beam 1, the heights of the central lines of the two cross beam mounting holes 11 are the same, and the diameters of the central lines are the same.
The two cross beams 2 are correspondingly inserted into the cross beam mounting holes 11 in the two side beams 1 respectively, and the two cross beams 2 are the same in size and height, so that the two cross beams 2 are symmetrically arranged, and the stress balance of the bogie is facilitated. The cross section of the cross beam 2 is circular, and can be a solid steel beam or a hollow steel pipe beam, and the cross beam mounting hole 11 arranged on the side beam 1 is a round hole.
As shown in fig. 1, the two cross members 2 are connected as an integral structure by fixedly connecting a longitudinal beam 3 extending in a longitudinal direction between the two cross members 2. The two cross beams 2 and the longitudinal beam 3 move relative to the side beam 1 together, so that the phenomenon that the performance of the bogie passing curve is influenced due to uneven stress caused by inconsistent relative displacement between the two cross beams 2 is avoided. Specifically, the number of the longitudinal beams 3 is two, and the longitudinal beams are symmetrically arranged on the inner side of the side beam 1.
The longitudinal beam 3 is arranged above the two cross beams 2 in a spanning mode, and the bottom surface of the longitudinal beam 3 is provided with two arc grooves matched with the cross beams 2. Specifically, the bottom surface of the longitudinal beam 3 is recessed inwards to form an arc-shaped recessed surface with the curvature radius consistent with that of the cross beam 2, and the arc-shaped recessed surface is welded and fixed with the cross beam 2 in a welding mode. The longitudinal beams 3 serve, on the one hand, to connect the two transverse beams 2 together and, on the other hand, to support and maintain the relative position of the two transverse beams 2.
The stop plate 5 also extends in the longitudinal direction, and is arranged over the two cross beams 2 to connect the two cross beams 2 into an integral structure. The stop plate 5 moves together with the two cross members 2, the longitudinal beam 3, relative to the side beam 1. The number of the stopper plates 5 is two, and the stopper plates are symmetrically arranged on the outer side of the side member 1.
The bottom surface of the stop plate 5 is provided with two arc grooves matched with the cross beam 2. Specifically, the bottom surface of the stopper plate 5 is recessed inward to form an arc-shaped recessed surface with a curvature radius consistent with that of the cross beam 2, and the arc-shaped recessed surface is welded and fixed with the cross beam 2 in a welding mode. The stop plates 5 serve, on the one hand, to connect the ends of the two cross members 2 together and, on the other hand, to support and maintain the relative position of the two cross members 2.
Fig. 4 is an exploded view of the assembly of a side sill and a cross member of a bogie provided by an embodiment of the present application. As shown in fig. 4, the cross member 2 includes: the beam comprises a beam main body section 21 and beam matching sections 22 positioned at two ends of the beam main body section 21, wherein the diameter of the beam main body section 21 is larger than that of the beam matching sections 22. The beam matching section 22 passes through the beam mounting hole 11, and the length of the beam matching section 22 is larger than that of the beam mounting hole 11. The longitudinal beam 3 is fixed to the beam main section 21 and the stopper plate 5 is fixed to the end of the beam fitting section 22.
Further, the bogie still includes secondary suspension device, and in traditional scheme, secondary suspension device is fixed on the curb girder, and its top links to each other with the automobile body for cushion the effort between automobile body and the curb girder. In this embodiment, the secondary suspension device is connected to the longitudinal beam 3 and the stopper plate 5, and moves together with the longitudinal beam 3, the stopper plate 5, and the cross beam 2 with respect to the side beam 1.
Fig. 5 is a schematic structural diagram of a middle side beam, a cross beam and a secondary assembly of the bogie provided by the embodiment of the present application, and fig. 6 is a top view of the middle side beam, the cross beam and the secondary assembly of the bogie provided by the embodiment of the present application. As shown in fig. 1, 4, 5 and 6, specifically, a secondary support plate 61 extending in the horizontal direction is provided above the longitudinal beam 3, the side beam 1 and the stopper plate 5 and connected to the longitudinal beam 3 and the stopper plate 5, and a secondary suspension device is provided on the secondary support plate 61. In fig. 6, the secondary suspension on one side is removed to avoid shadowing, for the sake of clarity in the assembled position of the longitudinal beam 3 and the stop plate 5.
The secondary suspension device includes: three sets of spring assemblies 62. One set of spring assemblies 62 is disposed on the inside and the other two sets of spring assemblies 62 are disposed on the outside and are arranged in sequence along the longitudinal direction. The center connecting lines of the three sets of spring assemblies 62 are in the shape of an equilateral triangle. The spring assembly 62 may include an outer steel spring and an inner steel spring nested together with opposite hand turns.
Accordingly, the length of the outer side of the secondary support panel 61 is greater than the length of the inner side, which is secured to the top of the longitudinal rail, and the outer side is secured to the top of the stopper panel. In the present embodiment, the secondary support plate 61 is approximately a triangular plate with an arc-shaped vertex, and preferably an equilateral triangular plate with an arc-shaped vertex.
Fig. 7 is a cross-sectional view of a cross member and a side member of a bogie according to an embodiment of the present application, which are relatively moved to a first limit position. The cross member 2, the longitudinal members 3, the stopper plates 5 and the secondary support plates 61 are moved rightward with respect to the side members 1. Fig. 7 shows the cross member 2 moving to the right relative to the side member 1 to a first extreme position, and the stop plate 5 at the left end of the cross member 2 limits the cross member 2 from continuing to move to the right.
Fig. 8 is a cross-sectional view of a cross member and a side member of the bogie according to the embodiment of the present application, which are relatively moved to a second limit position. The cross member 2, the longitudinal member 3, the stopper plate 5 and the secondary support plate 61 are moved leftward with respect to the side member 1. Fig. 8 shows the transverse beam 2 moving to the left relative to the side beam 1 to a first extreme position, the longitudinal beam 3 at the right end of the transverse beam 2 limiting the transverse beam 2 to continue moving to the left.
By adopting the scheme, the transverse displacement of the cross beam 2 can reach +/-5 mm, and the cross beam can adapt to a turning curve with a small curvature radius of 150m on the premise of meeting the requirement of normal turning and running of a railway vehicle.
For the cooperation between the secondary suspension device and the side member 1, the present embodiment also provides an implementation: a guide structure is provided between the bottom surface of the secondary support plate 61 and the top surface of the side member 1, and the secondary support plate 61 and the side member 1 are connected by the guide structure. The spring assembly 62 is attached to the secondary support plate 61 at its bottom and to the vehicle body at its top. On one hand, the weight of the vehicle body is loaded on the side beam 1 through the secondary suspension device, and the side beam 1 can support the vehicle body; on the other hand, the guide structure guides the lateral relative movement between the secondary support plate 61 and the side member 1.
A specific implementation manner is as follows: a guide block extending in the lateral direction is provided in a protruding manner on the bottom surface of the secondary support plate 61, a guide groove extending in the lateral direction is provided in a recessed manner corresponding to the top surface of the middle portion of the side member 1, and the guide block slides in the guide groove to guide the movement between the side member 1 and the secondary support plate 61. Relative movement between the side members 1 and the tie support plates 61 is restricted only in the lateral direction.
Alternatively, the guide material is directly coated on the bottom surface of the secondary support plate 61 and the top surface of the side member 1, for example: grease or the like to prevent surface damage due to rigid friction between the secondary support plate 61 and the side member 1.
The embodiment also provides a railway vehicle, which comprises the bogie. The rail vehicle provided by the embodiment has the same technical effects as the bogie.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically connected, electrically connected or can communicate with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (6)
1. A bogie, comprising:
two side beams arranged in parallel, the side beams extending in a first direction; a cross beam mounting hole is formed in the middle of the side beam and is a through hole, the center line of the cross beam mounting hole extends along a second direction, and the second direction is perpendicular to the first direction;
the cross beam extends along the second direction, two ends of the cross beam respectively penetrate through the cross beam mounting holes in the two side beams, and the cross beam and the side beams can generate relative displacement along the second direction; the length of the cross beam is greater than the distance between the outer side surfaces of the two side beams;
the longitudinal beam is positioned on the inner side of the side beam and fixed on the cross beam;
the stop plate is positioned on the outer side of the side beam and fixed on the cross beam; the transverse distance between the stop plate and the longitudinal beam is greater than the transverse width of the side beam;
the number of the cross beams is two, and a preset distance is reserved between the two cross beams;
the number of the beam mounting holes is two, and the beam mounting holes are symmetrically arranged in the middle of the side beam; one beam is correspondingly inserted into one beam mounting hole;
the longitudinal beam extends along a first direction and is fixedly connected with the two cross beams;
the stop plates extend along the first direction and are fixedly connected with the two cross beams;
the stop plates are arranged above the end parts of the two cross beams in a spanning mode, and the longitudinal length of each stop plate is larger than the distance between the outer side surfaces of the two cross beams; the bottom surface of the stop plate is provided with two arc grooves matched with the cross beam;
the bogie further comprises: a secondary support plate for mounting a secondary suspension device; the second series supporting plate is positioned above the longitudinal beam, the side beam and the stop plate and is fixedly connected with the longitudinal beam and the stop plate respectively.
2. The bogie according to claim 1, wherein the longitudinal beam spans over two cross beams, and the bottom surface of the longitudinal beam is provided with two circular arc grooves which are matched with the cross beams.
3. The bogie according to any one of claims 1-2, wherein the cross beam comprises: the beam comprises a beam main body section and beam matching sections positioned at two ends of the beam main body section, wherein the diameter of the beam main body section is larger than that of the beam matching sections; the beam matching section penetrates through the beam mounting hole, and the length of the beam matching section is greater than that of the beam mounting hole; the longitudinal beam is fixed on the main body section of the cross beam, and the stop plate is fixed on the end part of the matching section of the cross beam.
4. The bogie according to any one of claims 1-2, wherein the secondary suspension device comprises: three sets of spring assemblies; one group of spring assemblies is arranged on the inner side, and the other two groups of spring assemblies are arranged on the outer side and are sequentially arranged along the first direction; the center connecting lines of the three groups of spring components are in an equilateral triangle shape.
5. The truck of claim 4 wherein the outboard side of the tie support plate is longer than the inboard side, the inboard side being secured to the top of the longitudinal beam and the outboard side being secured to the top of the stop plate.
6. A rail vehicle, comprising: a bogie as claimed in any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010820705.3A CN111994121B (en) | 2020-08-14 | 2020-08-14 | Bogie and rail vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010820705.3A CN111994121B (en) | 2020-08-14 | 2020-08-14 | Bogie and rail vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111994121A CN111994121A (en) | 2020-11-27 |
| CN111994121B true CN111994121B (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010820705.3A Active CN111994121B (en) | 2020-08-14 | 2020-08-14 | Bogie and rail vehicle |
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| Country | Link |
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| CN (1) | CN111994121B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111994118B (en) * | 2020-08-14 | 2022-02-01 | 中车唐山机车车辆有限公司 | Rail vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202879514U (en) * | 2012-10-26 | 2013-04-17 | 南车青岛四方机车车辆股份有限公司 | Bullet train steering support framework of railway vehicle |
| CN203496922U (en) * | 2013-05-15 | 2014-03-26 | 南车株洲电力机车有限公司 | Truck frame |
| KR101488345B1 (en) * | 2013-11-07 | 2015-01-30 | 현대로템 주식회사 | Bogie of the active damper safely device and rail vehicle having the same |
| CN105835898A (en) * | 2016-03-26 | 2016-08-10 | 中车青岛四方机车车辆股份有限公司 | Bogie |
| CN111497885A (en) * | 2020-05-08 | 2020-08-07 | 中车齐齐哈尔车辆有限公司 | Vehicle and framework thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209700677U (en) * | 2019-03-22 | 2019-11-29 | 通号轨道车辆有限公司 | A kind of framework and tramcar bogie |
-
2020
- 2020-08-14 CN CN202010820705.3A patent/CN111994121B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202879514U (en) * | 2012-10-26 | 2013-04-17 | 南车青岛四方机车车辆股份有限公司 | Bullet train steering support framework of railway vehicle |
| CN203496922U (en) * | 2013-05-15 | 2014-03-26 | 南车株洲电力机车有限公司 | Truck frame |
| KR101488345B1 (en) * | 2013-11-07 | 2015-01-30 | 현대로템 주식회사 | Bogie of the active damper safely device and rail vehicle having the same |
| CN105835898A (en) * | 2016-03-26 | 2016-08-10 | 中车青岛四方机车车辆股份有限公司 | Bogie |
| CN111497885A (en) * | 2020-05-08 | 2020-08-07 | 中车齐齐哈尔车辆有限公司 | Vehicle and framework thereof |
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| Publication number | Publication date |
|---|---|
| CN111994121A (en) | 2020-11-27 |
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