CN211543545U - Underframe structure and underframe boundary beam assembling structure thereof - Google Patents
Underframe structure and underframe boundary beam assembling structure thereof Download PDFInfo
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- CN211543545U CN211543545U CN201921593256.2U CN201921593256U CN211543545U CN 211543545 U CN211543545 U CN 211543545U CN 201921593256 U CN201921593256 U CN 201921593256U CN 211543545 U CN211543545 U CN 211543545U
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Abstract
The utility model discloses a chassis boundary beam package assembly, include: the high edge beam, the low edge beam and a connecting mechanism connected between the high edge beam and the low edge beam; the connecting mechanism is provided with a first transition section, and/or a second transition section is arranged at the joint of the high boundary beam and the low boundary beam. In this scheme, through setting up first transition section and second transition section, realized having helped alleviating the stress of being connected between high boundary beam and the low boundary beam for chassis boundary beam package assembly constructs second grade buffer structure, not only reduced the stress concentration of high boundary beam and low boundary beam junction, but also reduced chassis height boundary beam and connected the big scheduling problem of welding seam deformation to chassis structure's bearing capacity has further been promoted. The utility model also discloses an use chassis structure of above-mentioned chassis boundary beam package assembly.
Description
Technical Field
The utility model relates to a rail vehicle body construction technical field, in particular to chassis structure and chassis boundary beam package assembly thereof.
Background
In order to accommodate platforms of different heights and facilitate passengers to get on and off, vehicle doors are generally arranged in a low floor area. However, due to the height limitations of the equipment and the bogie, the whole low floor cannot be made, and a part of the high floor area needs to be reserved. In the current vehicle body underframe structure, there are the following disadvantages:
1. the high-low floor and the high-low edge beam have more connecting welding seams and large deformation, and stress concentration is easy to generate;
2. the underframe and the bogie are usually connected by adopting a welding mounting seat, and because the seat needs to bear alternating load, if a welding seam is defective or the load is abnormal, the welding seam is likely to be fatigued and damaged, and potential safety hazards are left for safe operation of vehicles.
Therefore, how to overcome the drawbacks of the current vehicle body underframe structure becomes a problem to be solved urgently by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an chassis boundary beam package assembly has reduced the stress concentration of high boundary beam and low boundary beam junction through setting up second grade buffer structure, has improved chassis bearing capacity, has solved the high low boundary beam joint weld of chassis many, warp big problem.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an underframe edge beam assembly structure comprising: the high edge beam, the low edge beam and a connecting mechanism connected between the high edge beam and the low edge beam;
the connecting mechanism is provided with a first transition section, and/or a second transition section is arranged at the joint of the high boundary beam and the low boundary beam.
Preferably, the connection mechanism includes: an L-shaped plate and a connecting plate;
the L-shaped plate is connected with the top end face of the inner side of the low edge beam at the vertical end, is connected with the side face of the inner side of the low edge beam at the horizontal end, and is connected with the corner of the L-shaped plate at one end and the bottom end face of the inner side of the high edge beam at the other end.
Preferably, the first transition section is a fillet section arranged at the end, close to the vertical part of the L-shaped plate, of the end of the low edge beam, and the fillet section enables the end of the inner side of the low edge beam and the end of the connecting mechanism to be in transition arrangement.
Preferably, the high side beam has an escape structure for cooperating with a bogie.
Preferably, the avoiding structure is a high boundary beam notch arranged at the lower part of the high boundary beam.
Preferably, the second transition section is for set up in high boundary beam the high boundary beam breach is close to the circular arc terminal surface of low boundary beam end one end, the circular arc terminal surface can make the one end of high boundary beam breach with low boundary beam outside end is the transition setting.
Preferably, the high side rail has a mounting structure for cooperating with a truck mount.
Preferably, the mounting structure is a rectangular cavity arranged at the bottom of the high-side beam;
chassis boundary beam package assembly still includes:
and the thread plate assembly is arranged in the rectangular cavity and is used for being matched with the bogie mounting seat.
Preferably, a first connecting joint is arranged on the outer side of the high side beam, and the first connecting joint is provided with a welding backing plate;
and a second connecting joint used for being connected and matched with the first connecting joint and/or the welding backing plate is arranged on the outer side of the low edge beam.
An undercarriage structure, comprising: the structure comprises a first end part structure, an underframe boundary beam assembly, a high floor, a second end part structure, a partition wall and a low floor, wherein the underframe boundary beam assembly is the underframe boundary beam assembly structure.
According to the technical scheme, the utility model provides an chassis boundary beam package assembly through setting up first transition section and second transition section, has realized that the second grade buffer structure is found for chassis boundary beam package assembly, helps alleviating the connecting stress between high boundary beam and the low boundary beam, has not only reduced the stress concentration of high boundary beam and low boundary beam junction, but also has reduced the big scheduling problem of chassis height boundary beam joint weld deformation to chassis structure's bearing capacity has further been promoted.
The utility model also provides an use above-mentioned chassis boundary beam package assembly's chassis structure, owing to adopted foretell technical scheme, consequently it also has corresponding beneficial effect, specifically can refer to preceding explanation, no longer gives unnecessary details here.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of an underframe structure provided in an embodiment of the present invention;
fig. 2 is a schematic view of an underframe boundary beam assembly structure provided in an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2;
fig. 4 is a schematic connection diagram of a first-stage buffer structure according to an embodiment of the present invention;
fig. 5 is a schematic connection diagram of a second-stage buffering structure provided in an embodiment of the present invention;
fig. 6 is a schematic view illustrating a connection between an edge beam of an underframe and a bogie mounting seat according to an embodiment of the present invention.
Wherein 1 is a second end structure; 2, assembling an underframe boundary beam, 21a, 21b, 21c, 21d, 22 and 24, wherein the underframe boundary beam is a high boundary beam, 21a is a high boundary beam notch, 21b is a second transition section, 21c is a first connecting joint, 21d is a rectangular cavity, 22 is a low boundary beam, 22a is a door opening, 22b is a low boundary beam outer plate, 22c is a second connecting joint, 23 is an L-shaped plate, 23a is a first transition section and 24 is a connecting plate; 3 is a high floor; 4 is a first end structure; 5 is a partition wall; 6 is a low floor; 7 is a bogie mounting seat; 8 is a thread plate; and 9 is a bolt.
Detailed Description
To the above problem with not enough, the embodiment of the utility model provides a novel automobile body chassis structure has adapted not co-altitude platform. The stress concentration of the joint of the high boundary beam and the low boundary beam is reduced by arranging the secondary buffer structure, the bearing capacity of the chassis is improved, and the problems of more connecting welding seams and large deformation of the high boundary beam and the low boundary beam of the chassis are solved. Meanwhile, the section of the side beam profile of the underframe is optimized, the side beam of the underframe is directly connected with the anti-rolling seat and the anti-snake-shaped shock absorber seat of the bogie, a transition mounting seat is omitted, and the problem of fatigue damage of the welding line of the transition mounting seat is solved.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model provides a chassis boundary beam package assembly, include: the structure of the high edge beam 21, the low edge beam 22 and the connecting mechanism connected between the high edge beam 21 and the low edge beam 22 can be seen in fig. 2;
the connecting mechanism is provided with a first transition section 23a and/or the junction of the high edge beam 21 and the low edge beam 22 is provided with a second transition section 21 b. It should be noted that the inner side of the low edge beam 22 is a suspended cavity structure. Therefore, it is necessary to connect between the inner sides of the high and low side members 21 and 22 using a connection mechanism to ensure the rigidity of the underframe side member assembly structure. Further, as shown in fig. 3, the first transition section 23a is a first transition end surface, so as to better release the connection stress between the high side beam 21 and the low side beam 22. Accordingly, the second transition section 21b is a second transition end surface, so as to release the stress at the connection between the high side beam 21 and the low side beam 22.
According to the technical scheme, the embodiment of the utility model provides an among the chassis boundary beam package assembly, through setting up first transition section and second transition section, realized having built second grade buffer structure for chassis boundary beam package assembly, help slowing down the connecting stress between high boundary beam and the low boundary beam, not only reduced the stress concentration of high boundary beam with low boundary beam junction, but also reduced the big scheduling problem of chassis height boundary beam joint weld deformation to chassis structure's bearing capacity has further been promoted.
Specifically, the connection mechanism includes: an L-shaped plate 23 and a connecting plate 24, the structure of which can be seen in fig. 3;
the L-shaped plate 23 has a vertical end connected to the top end surface of the inner side of the low edge beam 22 (i.e., the top rib plate of the inner side of the low edge beam 22 in fig. 4), a horizontal end connected to the side surface of the inner side of the low edge beam 22 (i.e., the inner side rib plate of the low edge beam 22 in fig. 4), and a connecting plate 24 has one end connected to the corner of the L-shaped plate 23 and the other end connected to the bottom end surface of the inner side of the high edge beam 21 (i.. Namely, the inside connection structure is constructed for the high side beam 21 and the low side beam 22 through the L-shaped plate 23 and the connecting plate 24, thereby facilitating the formation of the first transition section 23a as the inside buffer structure to reduce the stress concentration at the inside connection position of the high side beam and the low side beam. In this scheme, L shaped plate 23 and low boundary beam 22 are the parallel and level setting, and its horizontal end needs to align with inboard side muscle board and connect to make L shaped plate 23 and connecting plate 24 cavity that both formed can correspond with the left side section bar cavity, not only make things convenient for coupling mechanism's welding, also provide good rigidity for the inboard connection structure of high and low boundary beam in addition.
In this scheme, as shown in fig. 3, first transition section 23a is for setting up in the fillet section (being the fillet terminal surface) that L shaped plate 23 is close to the one end of low boundary beam 22 end, so that L shaped plate one end forms transition fit with the inboard end of low boundary beam 22, the fillet section can make the inboard end of low boundary beam 22 and coupling mechanism one end set up for transiting, in order to slow down the stress of high boundary beam 21 and the inboard junction of low boundary beam 22, and then the effect of first order buffer structure has been played, thereby the stress concentration of high boundary beam 21 and the inboard junction of low boundary beam 22 has been reduced, with this chassis bearing capacity has been improved.
Specifically, the high side beam 21 has an avoidance structure for cooperating with the bogie to avoid assembly interference of the high side beam 21 with the bogie frame, ensuring the operability of vehicle body structure assembly.
Specifically, as shown in fig. 2, the avoiding structure is a high side beam notch 21a formed at the lower portion of the high side beam 21, so as to make a mounting space for the bogie frame well, and to ensure the orderly matching between the vehicle body structures. In this scheme, choose for use high boundary beam breach 21a as the dodge structure of high boundary beam 21, have simple structure, characteristics such as easily processing, but also can utilize high boundary beam breach 21a in order to form second level buffer structure (see below in the details) near the one end of high boundary beam 21 and low boundary beam 22 junction.
In order to further optimize the above technical solution, as shown in fig. 3, the second transition section 21b is an arc end surface (i.e. an arc end surface, so that one end of the high edge beam notch 21a is in transition fit with the outer end of the low edge beam 22) that is arranged at one end of the high edge beam notch 21a of the high edge beam 21 close to the end of the low edge beam 22, and the arc end surface can enable one end of the high edge beam notch 21a and the outer end of the low edge beam 22 to be in transition fit, so as to reduce the stress at the outer connection between the high edge beam 21 and the low edge beam 22, and accordingly, further play a role of a second-stage buffer structure, so as to reduce the stress concentration phenomenon at the outer connection between the high edge beam 21 and the low edge beam 22. In this scheme, combine the first order buffer structure in the above, both have constituted chassis boundary beam package assembly's second grade buffer structure to greatly reduced the stress concentration of junction, improved chassis bearing capacity, reduced welding deformation simultaneously.
In this embodiment, the high side beam 21 has a mounting structure for cooperating with the bogie mounting seat 7. The direct connection of the side beam of the underframe and the bogie mounting seat 7 can be realized through the mounting structure, and then the transitional connection of the transitional mounting seat is cancelled, so that the problem of fatigue damage of the welding line of the transitional mounting seat is solved, and the reliability of connection of a car body and a bogie is further improved.
Specifically, the mounting structure is a rectangular cavity 21d disposed at the bottom of the high-side beam 21, and the structure thereof can be seen in fig. 6; in the scheme, the rectangular cavity 21d is selected as the mounting structure for the high edge beam 21 to be matched with the bogie mounting seat 7, so that the rigidity of the mounting structure for the high edge beam 21 can be enhanced, the built-in mounting of the threaded plate assembly is realized, the influence of the external environment on the threaded plate assembly is effectively avoided, and the service life of the mounting structure is ensured;
chassis boundary beam package assembly still includes:
the threaded plate component is arranged in the rectangular cavity 21d and is used for being matched with the bogie mounting seat 7; it will be understood that the thread plate assembly comprises a thread plate 8 and a bolt 9. In this scheme, select for use the screw plate 8 as the nut of bolt 9, mainly utilize the rotation that bolt 9 drove screw plate 8 to 8 sides of screw plate and the cavity wall in rectangle chamber 21d form the screens cooperation, have realized the fixed of screw plate 8 promptly, and then make things convenient for the installation of bolt 9. Specifically, the threaded plate 8 is pre-installed in the rectangular cavity 21d, and then the high side beam 21 is connected with the bogie mounting seat 7 through the bolt 9, so that the direct connection between the underframe side beam and the bogie mounting seat 7 can be realized. Further, the underframe edge beam and the bogie mounting seat 7 are directly connected by adopting a thread plate assembly, and the bogie connecting structure has the characteristics of simple connecting form, high connecting reliability and the like.
In order to further optimize the above technical solution, as shown in fig. 4 and 5, a first connection joint 21c is provided at the outer side of the high side beam 21, and the first connection joint 21c has a welding pad plate to increase the contact area between the first connection joint 21c and the second connection joint 22 c; a second connecting joint 22c used for connecting and matching with the first connecting joint 21c and/or the welding backing plate is arranged on the outer side of the low edge beam 22;
specifically, the connection between the outer side of the high side member 21 and the outer side of the low side member 22 is achieved by the butt joint of the first connection joint 21c and the second connection joint 22 c. In particular, the provision of the welding pad plate through the first connection joint 21c contributes to increasing the abutting area of the first connection joint 21c and the second connection joint 22c to further enhance the reliability of the connection of the high side member 21 and the low side member 22. In this scheme, the butt joint end of first attach fitting 21c and second attach fitting 22c adopts the chamfer setting to in increase welding area of contact between them, in order to further strengthen the reliability that high low boundary beam connects again.
It can be seen that the upper side member 21 and the lower side member 22 have a double connection structure of the inner and outer sides. Specifically, the first connection joint 21c and the second connection joint 22c are butted to each other, so that the high edge beam 21 and the low edge beam 22 are directly connected to each other at the outer side, and then the second transition section 21b is arranged at the joint of the high edge beam 21 and the low edge beam 22 (i.e., at the end of the high edge beam notch 21a close to the joint), so that the buffer structure of the high edge beam 21 and the low edge beam 22 at the outer side is realized. Correspondingly, the high boundary beam 21 and the low boundary beam 22 are indirectly connected at the inner sides through the connecting mechanism, and then the buffer structure of the high boundary beam 21 and the low boundary beam 22 at the inner sides is realized through the first transition section 23a of the connecting mechanism, so that the secondary buffer structure of the high boundary beam and the low boundary beam of the underframe is constructed, the stress concentration at the joint of the high boundary beam and the low boundary beam is reduced, and the bearing capacity of the underframe is improved.
The embodiment of the utility model provides a still provide an underframe structure, as shown in figure 1, include: the structure comprises a first end structure 1, an underframe boundary beam assembly 2, a high floor 3, a second end structure 4, a partition wall 5 and a low floor 6, wherein the underframe boundary beam assembly 2 is the underframe boundary beam assembly structure, and due to the adoption of the technical scheme, the underframe boundary beam assembly structure also has corresponding beneficial effects, and specific reference can be made to the foregoing description, and the details are not repeated.
The present solution is further described below with reference to specific embodiments:
the utility model discloses the automobile body chassis comprises first end structure, chassis boundary beam equipment, high floor, second end structure, partition wall, low floor isotructure. The stress concentration at the joint of the high boundary beam and the low boundary beam is reduced by adopting a secondary buffer structure, and the bearing capacity of the underframe is improved. Through optimizing the section bar section of chassis boundary beam, set up the rectangle chamber, place screw thread installation piece in the chamber, through anti side roll seat and the snakelike shock absorber seat of bolt lug connection chassis boundary beam and bogie, cancelled the transition mount pad, improved the reliability that automobile body and bogie are connected.
The underframe structure of the utility model is shown in figure 1. The underframe is mainly composed of a second end structure 1, an underframe edge beam assembly 2, a high floor 3, a first end structure 4, a partition wall 5, a low floor 6 and the like, wherein the partition wall 5 connects the high floor 3 and the low floor 6.
Fig. 2 is an assembly view (bottom view) of the undercarriage side rails. Mainly comprises a high edge beam 21, a low edge beam 22, an L-shaped plate 23 and a connecting plate 24. In the bogie area, a cavity at the lower part of the high side beam 21 is processed to form a high side beam notch 21a, so that the interference between the high side beam 21 and a bogie frame is avoided. The rocker 22 is machined according to the overall parameters of the vehicle body to form a door opening 22 a.
Fig. 3 is an enlarged view I of a portion of the undercarriage sill assembly (i.e., fig. 2). The inner side of the cavity of the low edge beam 22 close to the end is machined, only the low edge beam outer plate 22b is reserved, the shape can be machined according to the shape, the design is that the low edge beam outer plate 22b is reserved for attractive appearance in order to form a first-stage buffer structure, and the low edge beam outer plate 22b can also be machined if only the stress direction is considered. The high edge beam 21 and the low edge beam 22 are connected through an L-shaped plate 23 and a connecting plate 24, wherein the L-shaped plate 23 is used for relieving stress through round-corner section transition, and the formed structure is a first-stage buffer structure. The high-side beam 21 is processed into an arc section, and the stress concentration phenomenon is reduced through the transition arrangement of the arc section. And then joined to the rocker 22 where the resulting structure is a second level of cushioning. Through the two-stage buffer structure, the stress concentration at the joint is greatly reduced, the bearing capacity of the underframe is improved, and meanwhile, the welding deformation is reduced. In the scheme, the principle of primary buffering and the principle of secondary buffering are that stress is released through arc transition. The existing structure is primary buffering, and the purpose of secondary buffering is that only primary buffering is arranged to release all stress because the stress concentration is large.
FIG. 4 is a schematic diagram of a first-level buffer structure. The outer side of the low edge beam 22 is connected with the first connecting joint 21c with the welding pad plate of the high edge beam 21 through a second connecting joint 22c, and the inner side is connected through an L-shaped plate 23, wherein the L-shaped plate 23 is flush with the low edge beam 22, and one end of the L-shaped plate is aligned with and connected with the inner rib plate. The connecting plate 24 connects the L-shaped plate 23 and the high side beam 21.
FIG. 5 is a schematic diagram of a second level buffer structure connection. The low-side beam 22 is connected to the first connection joint 21c with a pad board of the high-side beam 21 only by the second connection joint 22 c.
FIG. 6 is a schematic view of the connection of the undercarriage side rails to the bogie mounting brackets. In the prior art, a transitional mounting seat is welded at the lower part of the underframe. The structure is designed in the form of a rectangular cavity 21d in order to be able to place a thread plate in the profile of the high-side beam 21. Specifically, high boundary beam 21 lower part sets up rectangle chamber 21d, puts into the die cavity in the outside with the flighted plate 8, links together high boundary beam 21 directly with bogie mount pad 7 through bolt 9, has cancelled prior art's transition mount pad, has avoided the welding seam to bear the risk that takes place fatigue failure, has improved the connection reliability.
Effects or characteristics of utility model
The utility model discloses chassis simple structure, easy modular production, intensity is good, has made things convenient for passenger and station staff. The secondary buffer structure is arranged, so that the side beam structure of the underframe of the car body is optimized, the stress concentration is reduced, the welding deformation is reduced, the production efficiency is improved, and the appearance is attractive. The chassis boundary beam section bar is directly connected with the anti-rolling seat and the anti-snake-shaped shock absorber seat of the bogie, so that the connection form is simple, the reliability is high, and good economic and social benefits are achieved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides an underframe boundary beam package assembly which characterized in that includes: the high edge beam (21), the low edge beam (22) and a connecting mechanism connected between the high edge beam (21) and the low edge beam (22);
the connecting mechanism is provided with a first transition section (23a), and/or a second transition section (21b) is arranged at the connecting position of the high edge beam (21) and the low edge beam (22).
2. The undercarriage edge beam assembly of claim 1 wherein said attachment mechanism comprises: an L-shaped plate (23) and a connecting plate (24);
the vertical end of the L-shaped plate (23) is connected to the top end face of the inner side of the low edge beam (22), the horizontal end of the L-shaped plate is connected to the side face of the inner side of the low edge beam (22), one end of the connecting plate (24) is connected to the corner of the L-shaped plate (23), and the other end of the connecting plate is connected to the bottom end face of the inner side of the high edge beam (21).
3. The underframe edge beam assembly structure of claim 2, wherein the first transition section (23a) is a rounded section provided at one end of the vertical part of the L-shaped plate (23) close to the end of the low edge beam (22), and the rounded section enables the transition between the end of the inner side of the low edge beam (22) and the end of the connecting mechanism.
4. The undercarriage sill assembly of claim 1, wherein the tall side beam (21) has an escape formation for cooperating with a bogie.
5. The underframe edge beam assembly structure of claim 4, wherein the avoiding structure is a high edge beam notch (21a) opened at the lower part of the high edge beam (21).
6. The underframe edge beam assembly structure of claim 5, wherein the second transition section (21b) is an arc end surface arranged at one end of the high edge beam notch (21a) of the high edge beam (21) close to the end of the low edge beam (22), and the arc end surface can enable one end of the high edge beam notch (21a) and the outer end of the low edge beam (22) to be in transition arrangement.
7. The undercarriage sill assembly of claim 1, characterized in that the tall side beam (21) has mounting structure for cooperating with a bogie mounting (7).
8. The undercarriage sill assembly of claim 7, wherein the mounting structure is a rectangular cavity (21d) provided in the bottom of the tall sill (21);
chassis boundary beam package assembly still includes:
and the threaded plate component is arranged in the rectangular cavity (21d) and is used for being matched with the bogie mounting seat (7).
9. The underframe edge beam assembly structure of claim 1, wherein a first connecting joint (21c) is arranged at the outer side of the high edge beam (21), and the first connecting joint (21c) is provided with a welding pad plate;
and a second connecting joint (22c) used for being connected and matched with the first connecting joint (21c) and/or the welding backing plate is arranged on the outer side of the low edge beam (22).
10. An undercarriage structure, comprising: -a first end structure (1), -an underframe edge beam assembly (2), -a high floor (3), -a second end structure (4), -a partition wall (5) and-a low floor (6), characterized in that the underframe edge beam assembly (2) is an underframe edge beam assembly structure according to any one of claims 1-9.
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| CN201921593256.2U CN211543545U (en) | 2019-09-24 | 2019-09-24 | Underframe structure and underframe boundary beam assembling structure thereof |
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| CN201921593256.2U CN211543545U (en) | 2019-09-24 | 2019-09-24 | Underframe structure and underframe boundary beam assembling structure thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113306587A (en) * | 2021-06-21 | 2021-08-27 | 中车株洲电力机车有限公司 | Rail vehicle chassis structure |
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2019
- 2019-09-24 CN CN201921593256.2U patent/CN211543545U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113306587A (en) * | 2021-06-21 | 2021-08-27 | 中车株洲电力机车有限公司 | Rail vehicle chassis structure |
| CN113306587B (en) * | 2021-06-21 | 2022-12-09 | 中车株洲电力机车有限公司 | Rail vehicle chassis structure |
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