CN114655268B - Boundary beam hanging structure and railway vehicle - Google Patents
Boundary beam hanging structure and railway vehicle Download PDFInfo
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- CN114655268B CN114655268B CN202210421309.2A CN202210421309A CN114655268B CN 114655268 B CN114655268 B CN 114655268B CN 202210421309 A CN202210421309 A CN 202210421309A CN 114655268 B CN114655268 B CN 114655268B
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- 230000003014 reinforcing effect Effects 0.000 claims abstract description 34
- 238000003466 welding Methods 0.000 claims description 26
- 239000000725 suspension Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- PHKJVUUMSPASRG-UHFFFAOYSA-N 4-[4-chloro-5-(2,6-dimethyl-8-pentan-3-ylimidazo[1,2-b]pyridazin-3-yl)-1,3-thiazol-2-yl]morpholine Chemical compound CC=1N=C2C(C(CC)CC)=CC(C)=NN2C=1C(=C(N=1)Cl)SC=1N1CCOCC1 PHKJVUUMSPASRG-UHFFFAOYSA-N 0.000 description 1
- 102100021752 Corticoliberin Human genes 0.000 description 1
- 101000895481 Homo sapiens Corticoliberin Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007723 die pressing method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000013000 roll bending Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- 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
- B61F1/00—Underframes
- B61F1/08—Details
-
- 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
- B61F1/00—Underframes
- B61F1/08—Details
- B61F1/14—Attaching or supporting vehicle body-structure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention discloses an edge beam hanging structure and a railway vehicle, and belongs to the technical field of railway vehicles, and the railway vehicle comprises a chassis cross beam, wherein two ends of the chassis cross beam are fixedly connected with the edge beam of the chassis; the outer side of the side beam of the underframe is fixedly provided with a reinforcing beam, and the reinforcing beam is provided with a plurality of hanging holes; the outer side of the chassis side beam is fixedly connected with the side wall side beam, the top of the side wall side beam is bent and is clamped with the upright post, and the upright post is fixedly connected with the outer side of the chassis side beam. The hanging structure provides a way for the integral installation of the equipment bin under the vehicle, and improves the installation efficiency of the equipment under the vehicle of the general assembly of the vehicle.
Description
Technical Field
The invention belongs to the technical field of rail vehicles, and particularly relates to a boundary beam hanging structure and a rail vehicle.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In the development process of each vehicle pedigree in the railway passenger car industry, the equipment under the car is installed by adopting a cross beam for hanging. In consideration of the requirements of weight balance, structural strength of hanging points and the like, the position arrangement of the cross beams of the underframe is required to be carried out according to equipment arrangement, and functional components such as longitudinal beams, reinforcing seats and the like are additionally welded on the underframe. With the development requirements of vehicle weight and cost, especially for urban rail vehicle products of small batch and multiple varieties, the original beam hanger cannot meet the requirements, and the modularization and standardization of vehicle systems become a development trend.
The inventor finds that the existing cross beam hanger has large weight of the car body because of arranging functional components such as longitudinal beams and the like, and cannot meet the requirement of light weight; and when the existing cross beam is hung on equipment under a vehicle, the installation mode is complex, the efficiency is low, and the labor intensity is high when the equipment is installed under the vehicle.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an edge beam hanging structure and a railway vehicle, wherein the hanging structure provides a way for the integral installation of an equipment bin under a vehicle, and improves the installation efficiency of equipment under the vehicle in the general assembly of the vehicle.
In order to achieve the above object, the present invention is realized by the following technical scheme:
In a first aspect, the invention provides an edge beam hanging structure, which comprises a chassis cross beam, wherein both ends of the chassis cross beam are fixedly connected with a chassis edge beam; the outer side of the side beam of the underframe is fixedly provided with a reinforcing beam, and the reinforcing beam is provided with a plurality of hanging holes; the outer side of the chassis side beam is fixedly connected with the side wall side beam, the top of the side wall side beam is bent and is clamped with the upright post, and the upright post is fixedly connected with the outer side of the chassis side beam.
As a further technical scheme, the reinforcing beam is of a rectangular structure, and the chassis side beam and the reinforcing beam are connected by arc welding.
As a further technical scheme, a plurality of reinforcing beams are arranged, and the plurality of reinforcing beams are arranged at intervals outside the side beams of the underframe.
As a further technical scheme, the setting position of the reinforcing beam is lower than the underframe cross beam.
As a further technical scheme, the outer side edges of the stand columns are obliquely arranged, and the cross sections of the stand columns are sequentially reduced from top to bottom.
As a further technical scheme, the side wall boundary beam comprises a first section and a second section which are connected, wherein the first section is obliquely arranged, the first section is fixedly connected with the outer side of the upright post, and the second section is horizontally arranged.
As a further technical scheme, the end part of the second section faces the edge beam of the underframe, the end part of the second section is bent to form a third section, and the third section is welded with the edge beam of the underframe.
As a further technical scheme, the end part of the first section is provided with a fourth section which is formed by bending, the fourth section is vertically connected with the first section, the fourth section is bent towards the upright post, and the fourth section is connected with an opening in a clamping manner formed in the side part of the upright post.
As a further technical scheme, the side wall edge beam outside sets up the wallboard, and spot welding connects between side wall edge beam and the wallboard, also spot welding connects between side wall edge beam and the stand, and stand and chassis edge beam adopt the arc welding to connect.
As a further technical scheme, the chassis side beam is of an inverted L-shaped plate structure and is hung on the top of the chassis cross beam; extension plates are arranged at the two ends and the top of the underframe cross beam, and spot welding is adopted at the extension plates to connect the underframe side beam and the underframe cross beam.
In a second aspect, the invention also provides a rail vehicle comprising the boundary beam hanging structure.
The beneficial effects of the invention are as follows:
According to the hanging structure, the underframe side beams, the side wall side beams and the upright posts form the section, the reinforcing beams are provided with hanging holes, so that sufficient structural strength is provided together, and the functional interface of the main structure is expanded; the under-car equipment can be installed by hoisting the under-car equipment in the hanging hole of the reinforcing beam, the hanging structure provides a way for the integral installation of the under-car equipment bin, the installation efficiency of the under-car equipment of the vehicle assembly is improved, and the labor intensity of equipment installation operation is reduced.
The hanging structure does not need parts such as a longitudinal beam and a reinforcing seat which are hung by an extra welded cross beam, reduces the weight of a vehicle body, reduces the rigidity and thickness requirements of the cross beam, avoids the change of structural strength and process equipment caused by the change of the arrangement of the cross beam, realizes the arrangement system type of the cross beams of different products, and provides effective support for the system type of a product pedigree platform.
According to the hanging structure, the chassis side beam is connected with the chassis cross beam, the side wall side beam is connected with the wallboard, the side wall side beam is connected with the upright post by adopting resistance spot welding, the reinforcing beam is connected with the chassis side beam by adopting arc welding, and the upright post is connected with the chassis side beam by adopting arc welding, so that the manufacturing manufacturability is strong and the economical efficiency is good.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic illustration of a side rail hanging structure in accordance with one or more embodiments of the present invention;
FIG. 2 is a schematic illustration of weld locations of chassis side rails and chassis cross beams in accordance with one or more embodiments of the present invention;
FIG. 3 is a schematic illustration of the connection of a reinforcing beam and a chassis side rail in accordance with one or more embodiments of the present invention;
in the figure: the mutual spacing or size is exaggerated for showing the positions of all parts, and the schematic drawings are used only for illustration;
The welding device comprises a 1-chassis side beam, a 2-reinforcing beam, a 3-side wall side beam, a 4-upright post, a 5-wallboard, a 6-chassis cross beam, a 7-spot welding position A, an 8-first section, a 9-second section, a 10-third section and an 11-fourth section.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
As described in the background art, the prior art has shortcomings, and in order to solve the technical problems, the invention provides an edge beam hanging structure.
In a typical embodiment of the present invention, as shown in fig. 1, an edge beam hanging structure is provided, which takes the concepts of structural strength, manufacturing process and functional interface and has the advantages of compact structure, simple and systematic process and good economy.
Specifically, this boundary beam suspended structure includes: chassis boundary beam 1, reinforcing beam 2, side wall boundary beam 3, upright post 4, wallboard 5, chassis crossbeam 6; the chassis side beam 1, the reinforcing beam 2 and the chassis cross beam 6 form a chassis part, and the side wall side beam 3, the upright post 4 and the wallboard 5 form a side wall part.
The underframe cross beams 6 are transversely arranged, the underframe cross beams 6 are arranged in a plurality, the underframe cross beams are arranged at intervals, and two ends of each underframe cross beam 6 are fixedly connected with the underframe boundary beam 1.
The chassis boundary beam 1 is longitudinally arranged, the chassis boundary beam 1 and the chassis cross beam 6 are vertically fixed, and the chassis cross beam is fixed on the side part of the chassis boundary beam when the chassis boundary beam is specifically arranged.
It can be understood that the chassis side beam 1 can be integrated or segmented, and when the chassis side beam is integrated, a plurality of chassis cross beams are fixed on the side parts of the chassis side beam; when the frame is in a sectional type, the frame side beams of each section are fixedly connected in a welding mode and the like, and the frame cross beams are respectively fixed on the side parts of the corresponding frame side beams.
The two ends and the top of the underframe cross beam 6 are respectively provided with an extension plate, the extension plates are connected with the underframe side beam 1 and the underframe cross beam 6 by adopting a spot welding process, and the spot welding position A7 is the welding position of the extension plates at the end part of the underframe cross beam and the side part of the underframe side beam.
The chassis boundary beam 1 is of an inverted L-shaped plate structure, the chassis boundary beam 1 is hung at the top of the chassis cross beam 6, and the chassis boundary beam is arranged at the corners in a smooth transition mode.
When the frame is specifically arranged, the top and the side parts of the frame cross beam 6 are welded and connected with the frame side beam 1, so that the frame cross beam and the frame side beam form a fixed whole.
The outer side of the chassis boundary beam 1 is fixedly connected with the side wall boundary beam 3, and the outer side of the chassis boundary beam 1 is fixedly provided with a reinforcing beam 2.
In this embodiment, the definition of the inner and outer sides is: the side part of the side beam, which is close to the cross beam of the underframe, is the inner side, and the opposite side is the outer side.
In this embodiment, the reinforcing beam 2 has a rectangular structure, specifically, a rectangular square steel pipe is adopted, and arc welding connection between the chassis side beam 1 and the reinforcing beam 2 is performed by adopting 30 (90) staggered section welding.
The reinforcing beams 2 are also arranged in a plurality at intervals on the chassis side beams 1, the chassis side beams, the side wall side beams and the upright posts form sectional materials, and the reinforcing beams provide enough structural strength.
The reinforcing beam 2 is provided with a hanging threaded hole (namely a hanging hole), the under-vehicle equipment bin can be hung at the hanging threaded hole through a fastener and the like, the functional interface of the main structure is expanded, and a way is provided for the integral installation of the under-vehicle equipment bin.
The setting position of the reinforcing beam 2 is lower than the underframe cross beam 6, so that the underframe cross beam is prevented from interfering the suspension of the equipment under the vehicle; when the frame is specifically arranged, the reinforcing beam and the frame cross beam are respectively and fixedly arranged on two sides of the frame side beam, and the reinforcing beam is lower than the frame cross beam.
The bottom of the side wall boundary beam 3 is fixedly connected with the underframe boundary beam 1, the top of the side wall boundary beam 3 is bent and is clamped with the upright post 4, and the upright post 4 is fixedly connected with the underframe boundary beam 1.
The stand 4 and the chassis boundary beam 1 are fixed mutually vertically, and when specifically setting up, stand 4 sets up a plurality of, and a plurality of stand intervals set up, and a plurality of stands are all fixed in between chassis boundary beam 1 and the side wall boundary beam 3.
It can be understood that the side wall edge beam 3 can be integrated or segmented, and when the side wall edge beam is integrated, a plurality of upright posts are fixed on the side parts of the side wall edge beam; when the side wall edge beam is arranged in a sectional type, the side wall edge beams of all the sections are fixedly connected in a welding mode and the like, and the upright posts are respectively fixed on the side parts of the corresponding side wall edge beams.
The wallboard 5 is arranged outside the side wall boundary beam 3, and the wallboard 5 is fixedly arranged on the outer side edge of the side wall boundary beam 3, so that the side wall part forms a sealing effect on the external appearance.
The side wall edge beam 3 is welded with the wallboard 5, and the side wall edge beam 3 is welded with the upright post 4; specifically, the side wall edge beam 3 and the wallboard 5 are connected by adopting resistance spot welding, and the side wall edge beam 3 and the upright post 4 are also connected by adopting resistance spot welding.
The upright post 4 is also welded with the chassis boundary beam 1, and specifically, the upright post 4 is connected with the chassis boundary beam 1 by adopting arc welding.
In this embodiment, the outer side of the upright 4 is inclined, that is, the side of the upright 4 connected to the side wall edge beam 3 is inclined, and the cross section of the upright is sequentially reduced from top to bottom; correspondingly, the outer side edges of the wallboard 5 and the side wall boundary beam 3 are also obliquely arranged, so that the whole side wall part is matched with the appearance of the railway vehicle body in the outside.
The side wall boundary beam 3 comprises a first section 8 and a second section 9 which are connected, the first section is obliquely arranged, the first section is fixedly connected with the outer side of the upright post, and the second section is horizontally arranged;
the first section and the second section are both of sectional material structures, and the joint of the first section and the second section is in smooth transition.
The first section 8 and the second section 9 are of an integral structure, and the integral structure in the invention can be an integral structure or a combined and connected structure, and is preferably an integral structure.
The second section 9 tip is towards chassis boundary beam 1, and the second section tip sets up to bend and forms third section 10, and third section and second section are perpendicular to be connected, third section and chassis boundary beam welded connection, third section and chassis boundary beam lateral part parallel arrangement, second section and chassis boundary beam set up perpendicularly, namely the vertical setting of third section.
In an alternative embodiment, the junction of the second section 9 and the third section 10 is rounded.
The tip setting of first section 8 is bent and is formed fourth section 11, and fourth section 11 and first section 8 are connected perpendicularly, and fourth section 11 is buckled towards the stand setting, and is connected with the opening card that the stand lateral part was seted up, can strengthen the connection steadiness of stand and side wall boundary beam from this.
In an alternative embodiment, the junction of the fourth section 11 and the first section 8 is rounded.
The underframe boundary beam 1 and the side wall boundary beam 3 are through long roll bending parts, and the others are profiling parts; in this embodiment, the chassis side beam 1 and the side wall side beam 3 are formed by rolling, the reinforcing beam 2 is formed by blanking and machining, the upright post 4 is formed by laser blanking, bending and die pressing, the wallboard 5 is formed by laser cutting, and the chassis cross beam 6 is formed by laser cutting and bending.
After each part is prepared and molded, arc welding and resistance spot welding are adopted to connect the underframe part and the side wall part into a hanging module, wherein the arc welding is constructed from the inside of the vehicle, and the resistance spot welding is welded under the vehicle.
The side beam hanging structure of the under-car equipment is simple to prepare and high in universality, changes in structure and method caused by hanging of the cross beam are solved, and structural strength, manufacturing process and functional interfaces are considered. The hanging structure is suitable for full-spectrum railway vehicle products, and provides effective support and way for product platform modularization. The steel structure is successfully applied to the car body steel structure of CRH1 motor train unit series projects at present, and has the advantages of stable product structure, simple manufacturing process and good use effect.
The invention fully exerts the structural strength of the whole bearing of the vehicle, is convenient for the weight balance of the whole vehicle, and greatly reduces the instability and failure risk of the steel structure of the vehicle body caused by local overload.
Example 2:
this embodiment proposes a rail vehicle including the boundary beam hanging structure as described above.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. The side beam hanging structure is characterized by comprising a bottom frame cross beam, wherein both ends of the bottom frame cross beam are fixedly connected with the bottom frame side beam; the outer side of the side beam of the underframe is fixedly provided with a reinforcing beam, and the reinforcing beam is provided with a plurality of hanging holes; the outer side of the chassis side beam is fixedly connected with the side wall side beam, the top of the side wall side beam is bent and is clamped with the upright post, and the upright post is fixedly connected with the outer side of the chassis side beam.
2. The side beam hanging structure according to claim 1, wherein the reinforcing beam has a rectangular structure, and the chassis side beam and the reinforcing beam are connected by arc welding.
3. The side beam hanging structure according to claim 1 or 2, wherein a plurality of the reinforcing beams are provided, and the plurality of reinforcing beams are provided at intervals outside the side beam of the chassis.
4. The side rail hanging structure according to claim 1 or 2, wherein the reinforcing beam is disposed at a position lower than the chassis cross member.
5. The side beam hanging structure according to claim 1, wherein the outer side edges of the upright posts are arranged in an inclined manner, and the cross sections of the upright posts are sequentially reduced from top to bottom.
6. The side rail hanging structure of claim 1 or 5, wherein the side rail comprises a first section and a second section connected with each other, the first section is inclined and fixedly connected with the outer side of the upright, and the second section is horizontally arranged.
7. The side beam hanging structure according to claim 6, wherein the second section end faces the side beam of the chassis, and the second section end is bent to form a third section, and the third section is welded with the side beam of the chassis.
8. The side beam hanging structure according to claim 6, wherein the end portion of the first section is bent to form a fourth section, the fourth section is vertically connected with the first section, and the fourth section is bent towards the upright post and is connected with an opening formed in the side portion of the upright post in a clamping manner.
9. The side sill hanging structure as claimed in claim 1, wherein the side sill is provided with a wall plate on the outer side thereof, the side sill is spot welded with the wall plate, the side sill is spot welded with the upright post, and the upright post is arc welded with the underframe side sill.
10. The boundary beam hanging structure according to claim 1, wherein the chassis boundary beam is of an inverted-L-shaped plate structure, and is hung on the top of the chassis cross beam; extension plates are arranged at the two ends and the top of the underframe cross beam, and spot welding is adopted at the extension plates to connect the underframe side beam and the underframe cross beam.
11. A rail vehicle comprising the boundary beam suspension structure according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210421309.2A CN114655268B (en) | 2022-04-21 | 2022-04-21 | Boundary beam hanging structure and railway vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210421309.2A CN114655268B (en) | 2022-04-21 | 2022-04-21 | Boundary beam hanging structure and railway vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN114655268A CN114655268A (en) | 2022-06-24 |
| CN114655268B true CN114655268B (en) | 2024-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210421309.2A Active CN114655268B (en) | 2022-04-21 | 2022-04-21 | Boundary beam hanging structure and railway vehicle |
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| CN (1) | CN114655268B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201864009U (en) * | 2010-11-23 | 2011-06-15 | 南车南京浦镇车辆有限公司 | Railway passenger car ocean shipping hoisting structure |
| CN203496603U (en) * | 2013-08-30 | 2014-03-26 | 中航黑豹股份有限公司 | Connecting structure of gasoline cargo carrying truck back plate spring |
| CN107499461A (en) * | 2017-07-31 | 2017-12-22 | 中车南京浦镇车辆有限公司 | One kind is used for rail vehicle band bogie and transports multi-functional fixed structure |
| CN110065517A (en) * | 2019-05-06 | 2019-07-30 | 中车青岛四方机车车辆股份有限公司 | Hanging beam, chassis and train |
| CN112158212A (en) * | 2020-08-26 | 2021-01-01 | 中车长春轨道客车股份有限公司 | Freight transportation EMUs body structure |
| CN112249067A (en) * | 2020-09-24 | 2021-01-22 | 中车南京浦镇车辆有限公司 | Railway vehicle underframe boundary beam connecting structure suitable for drum-shaped vehicle body |
| CN213502288U (en) * | 2020-09-28 | 2021-06-22 | 中车青岛四方机车车辆股份有限公司 | Vehicle body chassis, vehicle body and rail vehicle |
-
2022
- 2022-04-21 CN CN202210421309.2A patent/CN114655268B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201864009U (en) * | 2010-11-23 | 2011-06-15 | 南车南京浦镇车辆有限公司 | Railway passenger car ocean shipping hoisting structure |
| CN203496603U (en) * | 2013-08-30 | 2014-03-26 | 中航黑豹股份有限公司 | Connecting structure of gasoline cargo carrying truck back plate spring |
| CN107499461A (en) * | 2017-07-31 | 2017-12-22 | 中车南京浦镇车辆有限公司 | One kind is used for rail vehicle band bogie and transports multi-functional fixed structure |
| CN110065517A (en) * | 2019-05-06 | 2019-07-30 | 中车青岛四方机车车辆股份有限公司 | Hanging beam, chassis and train |
| CN112158212A (en) * | 2020-08-26 | 2021-01-01 | 中车长春轨道客车股份有限公司 | Freight transportation EMUs body structure |
| CN112249067A (en) * | 2020-09-24 | 2021-01-22 | 中车南京浦镇车辆有限公司 | Railway vehicle underframe boundary beam connecting structure suitable for drum-shaped vehicle body |
| CN213502288U (en) * | 2020-09-28 | 2021-06-22 | 中车青岛四方机车车辆股份有限公司 | Vehicle body chassis, vehicle body and rail vehicle |
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| CN114655268A (en) | 2022-06-24 |
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