CN111348063B - Connecting structure of side wall stand column and underframe side beam, vehicle body and rail vehicle - Google Patents
Connecting structure of side wall stand column and underframe side beam, vehicle body and rail vehicle Download PDFInfo
- Publication number
- CN111348063B CN111348063B CN201811560579.1A CN201811560579A CN111348063B CN 111348063 B CN111348063 B CN 111348063B CN 201811560579 A CN201811560579 A CN 201811560579A CN 111348063 B CN111348063 B CN 111348063B
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- side wall
- underframe
- fixing plate
- upright post
- boundary beam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
- B61D17/043—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures connections between superstructure sub-units
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/04—Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
- B61D17/08—Sides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
Abstract
The embodiment of the application relates to the technical field of rail vehicles, in particular to a connecting structure of a side wall upright post and an underframe edge beam, a vehicle body and a rail vehicle. The connecting structure comprises a side wall upright post, an underframe boundary beam and a connecting piece welded on one side of the underframe boundary beam close to the arc-shaped surface, wherein the connecting piece is used for enhancing the connecting strength between the side wall upright post and the underframe boundary beam; one part of the bottom end surface of the side wall upright column is welded and connected to the top surface of the side beam of the underframe, and the other part of the bottom end surface of the side wall upright column is welded and connected to the connecting piece; this connection structure adds the connecting piece between side wall stand and chassis boundary beam, can increase the welding seam length between chassis boundary beam and the side wall stand through the connecting piece, and then improves the joint strength between side wall stand and the chassis boundary beam, can solve current automobile body because of the unable welding of side wall stand and chassis boundary beam in the circular arc department of chassis boundary beam reduces joint strength's problem.
Description
Technical Field
The application relates to the technical field of rail vehicles, in particular to a connecting structure of a side wall stand column and an underframe side beam, a vehicle body and a rail vehicle.
Background
In the existing vehicle body structure of the rail vehicle, a side wall upright post is directly welded on a side beam of an underframe. However, when the vehicle body needs to bear a large longitudinal compression load such as 3560kN, the weld joint between the side wall pillar and the underframe edge beam needs to bear a very high load. When the underframe boundary beam of the car body adopts the groove type boundary beam, the corners of the boundary beam generally adopt circular arc transition to prevent stress concentration, and when the bottom end of the side wall stand column is welded with the top surface of the underframe boundary beam, because one side of the boundary beam close to the side wall plate is provided with a circular arc surface, the side wall stand column and the underframe boundary beam can not be welded at the circular arc surface, thereby reducing the problem of the connection strength between the side wall stand column and the underframe boundary beam.
Disclosure of Invention
The embodiment of the application provides a connection structure of side wall stand and chassis boundary beam, automobile body and rail vehicle, this connection structure has increased the connecting piece between side wall stand and chassis boundary beam, can increase the welding seam length between chassis boundary beam and the side wall stand through the connecting piece, and then improve the joint strength between side wall stand and the chassis boundary beam, can solve current automobile body because of the unable welding of side wall stand and chassis boundary beam in the circular arc department of chassis boundary beam and reduce the problem of joint strength.
According to a first aspect of the embodiment of the application, a connecting structure of a side wall upright post and an underframe boundary beam is provided, which comprises a side wall upright post and an underframe boundary beam, wherein the underframe boundary beam is provided with a top surface, a side surface and an arc surface for connecting the top surface and the side surface;
the side wall side frame is characterized by further comprising a connecting piece welded on the top surface of the side beam of the bottom frame close to the arc-shaped surface, wherein the connecting piece is used for enhancing the connecting strength between the side wall upright post and the side beam of the bottom frame;
and one part of bottom end surface of the side wall upright column is welded and connected with the top surface of the side beam of the bottom frame, and the other part of bottom end surface of the side wall upright column is welded and connected with the connecting piece.
Preferably, the connecting piece comprises a first fixing plate parallel to the top surface, and the first fixing plate comprises a first side surface welded to the top surface and a second side surface welded to the bottom end surface of the side wall upright;
the bottom end surface of the side wall stand column is a step surface, a first groove is formed in one side, facing the arc-shaped surface, of the bottom end surface of the side wall stand column, and the first groove is used for embedding the first fixing plate;
and the depth of the first groove is equal to the thickness of the first fixing plate along the direction from the side wall upright post to the side beam of the bottom frame.
Preferably, the connecting piece further comprises a second fixing plate which extends in the vertical direction and is vertically intersected with the first fixing plate, the inner side face of the second fixing plate is connected with the side wall upright in a welding mode, and the outer side face of the second fixing plate is coplanar with the side face of the underframe edge beam;
and a second groove is formed in one side, facing the arc-shaped surface, of the bottom end surface of the side wall stand column and used for embedding the second fixing plate.
Preferably, the projection area of the first fixing plate on the top surface of the underframe edge beam is larger than the projection area of the side wall upright column on the top surface of the underframe edge beam.
Preferably, along the length extending direction of the underframe boundary beam, the size of the first fixed plate is larger than that of the side wall column.
Preferably, the side wall upright post is provided with a plurality of lightening holes.
Preferably, the connecting piece is an angle steel, and the side wall upright post is a rectangular pipe.
Preferably, the side wall upright post is a square tube.
According to a second aspect of the embodiments of the present application, a vehicle body of a rail vehicle is provided, which includes an underframe provided with an underframe edge beam and a side wall provided with a side wall upright post, wherein the side wall upright post is connected with the underframe edge beam through any one of the connection structures provided by the above technical solutions.
In addition, according to a third aspect of the embodiments of the present application, there is provided a rail vehicle including the vehicle body provided as in the above-described technical solutions.
By adopting the connecting structure of the side wall upright post and the underframe edge beam, the vehicle body and the rail vehicle, which are provided by the embodiment of the application, the connecting part is additionally arranged between the side wall upright post and the underframe edge beam and is arranged at one side with an arc surface of the underframe edge beam so as to increase the length of the welding seam between the underframe edge beam and the side wall upright post by the plane joint welding between the connecting part and the underframe edge beam, so that the side wall upright post is not only directly connected with the underframe edge beam, but also indirectly connected with the underframe edge beam through the connecting part, and the length of the welding seam between the side wall upright post and the underframe edge beam is at least five from the original three welding seams, therefore, the length of the welding seam between the side wall upright post and the underframe edge beam can be increased, the connecting strength between the side wall upright post and the underframe edge beam is further improved, the stress condition of the connecting welding seam, make connection structure satisfy structural strength requirement, can solve current automobile body because of the unable welding of side wall stand and chassis boundary beam in the circular arc department of chassis boundary beam reduces joint strength's problem.
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 schematic perspective view of a connection structure of a side wall pillar and an underframe edge beam provided in an embodiment of the present application;
FIG. 2 is a schematic view of the connection structure provided in FIG. 1 in the direction A;
FIG. 3 is a schematic view of the connection structure provided in FIG. 1 in the direction B;
FIG. 4 is a schematic perspective view of a sidewall pillar in the connection structure shown in FIG. 1;
fig. 5 is a schematic perspective view of another structure for connecting a sidewall pillar and an underframe edge beam according to an embodiment of the present application.
Reference numerals:
1-side wall upright posts; 2-underframe edge beam; 3-a connector; 11-bottom end face; 12-a first groove; 13-a second groove; 14-lightening holes; 21-top surface; 22-side; 23-arc-shaped surface; 31-a first fixing plate; 32-a second fixing plate; 311-a first side; 312 — a second side; 321-medial side; 322-outer side.
Detailed Description
In the process of realizing this application, the inventor finds that because the side beam is close to the side wall board one side has the arc surface, the side wall stand can't be welded with the chassis boundary beam in arc surface department, and then reduces the problem of joint strength between side wall stand and the chassis boundary beam.
To above-mentioned problem, the embodiment of this application provides a connection structure of side wall stand and chassis boundary beam, automobile body and rail vehicle, this connection structure has increased the connecting piece between side wall stand and chassis boundary beam, can increase the welding seam length between chassis boundary beam and the side wall stand through the connecting piece, and then improve the joint strength between side wall stand and the chassis boundary beam, can solve current automobile body because of the unable welding of side wall stand and chassis boundary beam in the circular arc department of chassis boundary beam reduces joint strength's problem.
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.
Example one
The embodiment of the application provides a connecting structure of a side wall upright post 1 and an underframe boundary beam 2, as shown in the structures of fig. 1 and 5, the connecting structure comprises the side wall upright post 1 and the underframe boundary beam 2, and the underframe boundary beam 2 is provided with a top surface 21, a side surface 22 and an arc surface 23 connecting the top surface 21 and the side surface 22; the underframe boundary beam 2 is a channel beam, the top surface 21 is used for welding and connecting a plurality of side wall upright posts 1, in order to prevent the underframe boundary beam 2 from generating stress concentration, the joint of the top surface 21 and the side surface 22 adopts fillet transition, and an arc surface 23 is formed;
the connecting structure further comprises a connecting piece 3 welded on the top surface 21 of the side beam 2 of the bottom frame, which is close to the arc-shaped surface 23, wherein the connecting piece 3 is used for enhancing the connecting strength between the side wall upright post 1 and the side beam 2 of the bottom frame; as shown in the structure of fig. 1 and 5, the connecting member 3 may be a flat plate or an angle steel; in the assembling process, one part of the bottom end surface 11 of the side wall upright post 1 is directly welded and connected with the top surface of the side frame boundary beam 2, and the other part of the bottom end surface 11 is indirectly welded and connected with the side frame boundary beam 2 through the connecting piece 3; the overlapping area between the connecting piece 3 and the top surface 21 of the side frame 2 is large, which is beneficial to improving the connecting strength between the side wall upright post 1 and the side frame 2;
one part of the bottom end surface 11 of the side wall upright 1 is welded and connected to the top surface 21 of the underframe edge beam 2, and the other part of the bottom end surface 11 is welded and connected to the connecting piece 3. As shown in fig. 1, 2 and 5, a part of the bottom end surface 11 of the arc surface 23 of the side wall pillar 1 away from the underframe edge beam 2 is welded and connected to the top surface 21 of the underframe edge beam 2, and a part of the bottom end surface 11 of the side wall pillar 1 close to the arc surface of the underframe edge beam 2 is welded and connected to the connecting piece 3, and is indirectly and fixedly connected to the underframe edge beam 2 through the connecting piece 3.
The connecting structure is additionally provided with the connecting piece 3 between the side wall upright post 1 and the bottom frame boundary beam 2, the connecting piece 3 is arranged on one side of the bottom frame boundary beam 2 with the arc surface 23, so that the length of the welding seam between the bottom frame boundary beam 2 and the side wall upright post 1 is increased through plane joint welding between the connecting piece 3 and the bottom frame boundary beam 2, the side wall upright post 1 is not only directly connected with the bottom frame boundary beam 2, but also the side wall upright post 1 is indirectly connected with the bottom frame boundary beam 2 through the connecting piece 3, the number of the welding seams between the side wall upright post 1 and the bottom frame boundary beam 2 is at least five from three original welding seams, compared with the prior art, the bottom end surface 11 of the side wall upright post 1 can not be welded with the arc surface 23 part of the bottom frame boundary beam 2, the welding area and the length of the welding seam between the side wall upright post 1 and the bottom frame boundary beam 2 can be increased, the stress condition of the connecting weld between the side wall upright post 1 and the bottom frame boundary beam 2 is improved, the calculated stress of the weld is reduced, the connecting structure meets the structural strength requirement, and the problem that the connecting strength is reduced because the side wall upright post 1 and the bottom frame boundary beam 2 cannot be welded at the arc of the bottom frame boundary beam 2 in the existing vehicle body can be solved.
In a specific embodiment, as shown in the structure of fig. 1 and 5, the connecting member 3 includes a first fixing plate 31 parallel to the top surface 21, the first fixing plate 31 includes a first side surface 311 welded to the top surface 21 and a second side surface 312 welded to the bottom end surface 11 of the sidewall upright 1; as shown in the structure of fig. 1, the connecting member 3 includes a first fixing plate 31 welded to the top surface 21 and a second fixing plate 32 perpendicularly connected to the first fixing plate 31, while the connecting member 3 of fig. 5 includes only the first fixing plate 31 parallel to the top surface 21; one side surface of the first fixing plate 31 is welded and connected to the top surface 21 of the side beam 2 of the underframe, and the other side surface is welded and connected to the side wall upright post 1;
the bottom end surface 11 of the side wall upright post 1 is a step surface, a first groove 12 is formed on one side, facing the arc-shaped surface 23, of the bottom end surface 11 of the side wall upright post 1, and the first groove 12 is used for embedding a first fixing plate 31; as shown in the structure of fig. 4, in order to realize seamless involution and welding of the side wall column 1, the chassis boundary beam 2 and the connecting member 3, the bottom end surface 11 of the side wall column 1 is a step surface, and a first groove 12 for embedding a first fixing plate 31 is formed on one side facing the arc surface 23, so that the first fixing plate 31 is embedded between the side wall column 1 and the chassis boundary beam 2 in a shape-fitting manner, and the side wall column 1 and the chassis boundary beam 2 are welded and connected into a whole through the first fixing plate 31;
the depth of the first groove 12 is equal to the thickness of the first fixing plate 31 in the direction from the sidewall pillar 1 toward the underframe edge beam 2. As shown in fig. 2 and fig. 5, the depth of the first groove 12 is equal to the thickness of the first fixing plate 31, so that when the first fixing plate 31 is installed between the side wall pillar 1 and the chassis side rail 2, the bottom surface of the first fixing plate 31 and the bottom end surface 11 of the side wall pillar 1 can be coplanar.
Because the first fixing plate 31 of the connecting piece 3 just can be embedded in the first groove 12 of the bottom end face 11 of the side wall upright post 1, the length of the weld between the first fixing plate 31 and the side frame edge beam 2 can be increased through the welding connection of the first fixing plate 31 and the top face 21 of the side frame edge beam 2, meanwhile, the length of the weld between the first fixing plate 31 and the side wall upright post 1 can also be increased through the arrangement of the first groove 12, so that the welding area between the side frame edge beam 2 and the side wall upright post 1 is increased, and the connecting strength between the side frame edge beam 2 and the side wall upright post 1 is further improved.
Furthermore, as shown in the structures of fig. 1, 2 and 3, the connecting member 3 may further include a second fixing plate 32 extending in the vertical direction and perpendicularly intersecting the first fixing plate 31, an inner side 321 of the second fixing plate 32 is welded to the sidewall pillar 1, and an outer side 322 is coplanar with the side 22 of the chassis edge beam 2; the second fixing plate 32 is perpendicularly intersected with the first fixing plate 31, and in order to prevent the stress concentration phenomenon, the connecting part between the first fixing plate 31 and the second fixing plate 32 can also adopt an arc transition;
the bottom end surface 11 of the side wall upright 1 is further formed with a second groove 13 at one side facing the arc-shaped surface 23, and the second groove 13 is used for embedding a second fixing plate 32.
In order to further improve the connection strength between the side wall upright post 1 and the connecting piece 3 and further improve the connection strength between the side wall upright post 1 and the side beam 2 of the underframe, the connecting piece 3 further comprises a second fixing plate 32 which is vertically crossed with the first fixing plate 31, and the welding strength between the side wall upright post 1 and the connecting piece 3 can be enhanced through the welding connection between the second fixing plate 32 and the side wall upright post 1; meanwhile, the outer side surface 322 of the second fixing plate 32 is coplanar with the side surface 22 of the underframe edge beam 2, so that the installation of other parts can not be influenced under the condition that the connecting piece 3 is added.
In order to ensure the welding strength between the chassis boundary beam 2 and the connecting member 3, as shown in the structure of fig. 1, the projected area of the first fixing plate 31 on the top surface 21 of the chassis boundary beam 2 is larger than the projected area of the side wall pillar 1 on the top surface 21 of the chassis boundary beam 2, such as: the projected area of the first fixing plate 31 on the top surface 21 of the chassis side rail 2 may be 2 times or more of the projected area of the side wall pillar 1 on the top surface 21 of the chassis side rail 2.
By increasing the projection area of the first fixing plate 31 on the top surface 21 of the chassis side beam 2, the welding area and the welding seam length between the first fixing plate 31 and the chassis side beam 2 can be increased, and the welding strength between the first fixing plate 31 and the chassis side beam 2 is further improved.
As shown in fig. 1, fig. 3 and fig. 5, along the length extending direction of the chassis boundary beam 2, the size of the first fixing plate 31 is greater than the size of the side wall pillar 1, that is, the projection area of the first fixing plate 31 is increased by the fact that the size of the first fixing plate 31 in the length extending direction of the chassis boundary beam 2 is greater than the size of the side wall pillar 1, so as to increase the welding area and the length of the welding seam of the first fixing plate 31 on the chassis boundary beam 2, thereby improving the connection strength between the first fixing plate 31 and the chassis boundary beam 2.
As shown in fig. 1 and 4, the sidewall pillar 1 is provided with a plurality of lightening holes 14. Through the lightening holes 14, the side wall upright post 1 can meet the requirements on rigidity and strength, and meanwhile, the weight of the side wall upright post 1 can be lightened, so that the light-weight requirement of the railway vehicle is met.
As shown in the structures of fig. 1 and 5, the connecting member 3 may be an angle steel or a flat plate; the side wall upright posts 1 can be rectangular tubes or square tubes.
Example two
The embodiment of the application provides a rail vehicle's automobile body, and this automobile body is connected including the chassis that is provided with chassis boundary beam 2 and the side wall that is provided with side wall stand 1, adopts like the arbitrary connection structure that embodiment provided above between side wall stand 1 and the chassis boundary beam 2.
Due to the fact that the connecting structure is adopted between the side wall of the vehicle body and the bottom frame, the connecting piece 3 is additionally arranged between the side wall upright post 1 and the bottom frame side beam 2, the welding area and the welding seam length between the side wall upright post 1 and the bottom frame side beam 2 can be increased through the connecting piece 3, and therefore the connecting strength between the side wall upright post 1 and the bottom frame side beam 2 is improved.
EXAMPLE III
The embodiment of the application provides a railway vehicle, which comprises a vehicle body provided in the embodiment.
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 (10)
1. A connecting structure of a side wall upright post and an underframe boundary beam comprises the side wall upright post and the underframe boundary beam, wherein the underframe boundary beam is provided with a top surface, a side surface and an arc surface connecting the top surface and the side surface; it is characterized in that the preparation method is characterized in that,
the side wall side frame is characterized by further comprising a connecting piece welded on the top surface of the side beam of the bottom frame close to the arc-shaped surface, wherein the connecting piece is used for enhancing the connecting strength between the side wall upright post and the side beam of the bottom frame;
one part of the bottom end surface of the side wall upright column is welded and connected to the top surface of the side beam of the underframe, and the other part of the bottom end surface of the side wall upright column is welded and connected to the connecting piece;
the connecting piece comprises a first fixing plate parallel to the top surface, and the first fixing plate comprises a first side surface welded with the top surface and a second side surface welded with the bottom end surface of the side wall upright post;
the bottom end face of the side wall stand column is a step face, a first groove is formed in one side, facing the arc-shaped face, of the bottom end face of the side wall stand column, and the first groove is used for embedding the first fixing plate.
2. The connection structure according to claim 1,
and the depth of the first groove is equal to the thickness of the first fixing plate along the direction from the side wall upright post to the side beam of the bottom frame.
3. The connecting structure of claim 2, wherein the connecting member further comprises a second fixing plate extending in the vertical direction and perpendicularly intersecting the first fixing plate, wherein an inner side surface of the second fixing plate is welded to the side wall pillar and an outer side surface of the second fixing plate is coplanar with the side surface of the underframe edge beam;
and a second groove is formed in one side, facing the arc-shaped surface, of the bottom end surface of the side wall stand column, and the second groove is used for embedding the second fixing plate.
4. The connecting structure according to claim 2, wherein a projected area of the first fixing plate on the top surface of the side sill of the underframe is larger than a projected area of the side wall pillar on the top surface of the side sill of the underframe.
5. The connection structure of claim 4, wherein the first fixing plate has a size larger than that of the sidewall post along a length extension direction of the underframe edge beam.
6. The connection structure according to any one of claims 1 to 5, wherein the side wall pillars are provided with a plurality of lightening holes.
7. The connecting structure according to any one of claims 1 to 5, wherein the connecting member is an angle steel, and the side wall pillar is a rectangular tube.
8. The connecting structure according to claim 7, wherein the side wall pillar is a square tube.
9. A vehicle body of a rail vehicle, which comprises an underframe provided with an underframe edge beam and a side wall provided with a side wall upright post, and is characterized in that the side wall upright post and the underframe edge beam are connected by adopting the connecting structure as claimed in any one of claims 1 to 8.
10. A rail vehicle, characterized by comprising a vehicle body according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811560579.1A CN111348063B (en) | 2018-12-20 | 2018-12-20 | Connecting structure of side wall stand column and underframe side beam, vehicle body and rail vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811560579.1A CN111348063B (en) | 2018-12-20 | 2018-12-20 | Connecting structure of side wall stand column and underframe side beam, vehicle body and rail vehicle |
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| CN111348063A CN111348063A (en) | 2020-06-30 |
| CN111348063B true CN111348063B (en) | 2021-01-05 |
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| CN111806480B (en) * | 2020-07-28 | 2021-09-10 | 中车青岛四方机车车辆股份有限公司 | Rail vehicle side wall and rail vehicle |
| CN112249067B (en) * | 2020-09-24 | 2023-04-14 | 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 |
| CN113771893B (en) * | 2021-08-20 | 2023-05-23 | 中车唐山机车车辆有限公司 | Vehicle body and magnetic levitation vehicle |
| CN113562009B (en) * | 2021-09-01 | 2022-07-19 | 中车齐齐哈尔车辆有限公司 | Side wall structure for depressed center low-floor vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS57113265U (en) * | 1981-01-06 | 1982-07-13 | ||
| WO2011038751A1 (en) * | 2009-09-29 | 2011-04-07 | Siemens Ag Österreich | Longitudinal girder for rail vehicles |
| CN102887152B (en) * | 2011-07-22 | 2015-04-15 | 中国北车集团大同电力机车有限责任公司 | Car body and connecting device of side wall and under frame |
| CN203681555U (en) * | 2014-01-07 | 2014-07-02 | 南车株洲电力机车有限公司 | Car body structure of rail car |
| CN204956484U (en) * | 2015-08-06 | 2016-01-13 | 南车眉山车辆有限公司 | Fall down crossbeam load bearing structure of hole car and connection structure with automobile body side wall thereof |
| CN107187453A (en) * | 2017-07-19 | 2017-09-22 | 中车眉山车辆有限公司 | A kind of high temperature is heat-fed steel billet transportation special-purpose vehicle side wall |
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