CN219029408U - Stainless steel end wall and rail vehicle - Google Patents

Abstract

The embodiment of the utility model discloses a stainless steel end wall and a railway vehicle, wherein the stainless steel end wall comprises: an end wall skeleton; the end wall skeleton comprises end wall corner posts and a plurality of door posts; an end wall upright post is arranged between the door upright post and the end wall corner post and is used for improving the strength of the end wall framework; a reinforcing plate is arranged between the adjacent door upright posts and connected with the end wall upright posts for increasing the strength of the door upright posts; the end wall plate is tiled on the end wall skeleton, and the end wall plate is connected with the end wall skeleton through a resistance spot welding mode. According to the stainless steel end wall, the end wall upright posts are arranged between the door upright posts and the end wall corner posts, so that the strength of the end wall skeleton is improved, meanwhile, the reinforcing plates are arranged between the adjacent door upright posts, so that the strength of the door upright posts is improved, the end wall skeleton is prevented from being deformed in a torsion mode, the strength of the end wall skeleton is further improved, the end wall plate is fixedly connected with the end wall skeleton in a resistance spot welding mode, and the connection strength of the end wall plate and the end wall skeleton is ensured.

Description

Stainless steel end wall and rail vehicle

Technical Field

The utility model relates to the technical field of urban railway traffic, in particular to a stainless steel end wall and a railway vehicle.

Background

At present, the domestic main rail vehicles mainly comprise high-speed motor train units, common speed trains, urban rail subways and the like, and the stainless steel end wall is used as one of main components of the rail vehicles and used for sealing and structural support of the tail part of the head vehicle and the head and tail ends of the middle vehicle, so that the overall rigidity and torsional deformation of the vehicle body can be effectively improved.

In the prior art, stainless steel headwall generally includes headwall frames and headwall plates. Wherein, the end wall board is fixed in the outside of end wall frame. Because the existing end wall frame is only provided with the end wall corner posts and the door upright posts, the overall strength and rigidity of the end wall frame are low, and therefore the whole end wall frame is easy to deform in a torsion mode, and further the stainless steel end wall has a large potential safety hazard.

In addition, the surface of the end wall plate is in a 2B state, the surface effect is dim, if the end wall plate has quality defects, the visual effect is obvious, and the end wall plates are sealed by gluing or common arc welding, so that the surface quality of the stainless steel end wall plate is poor.

Therefore, how to improve the strength of the stainless steel end wall is a technical problem to be solved by the person skilled in the art.

Disclosure of Invention

Accordingly, the present utility model is directed to a stainless steel end wall to improve the strength of the stainless steel end wall;

another object of the present utility model is to provide a rail vehicle having the stainless steel headwall described above.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a stainless steel headwall comprising:

an end wall skeleton; the end wall framework comprises end wall corner posts and a plurality of door upright posts; an end wall upright post is arranged between the door upright post and the end wall corner post and is used for improving the strength of the end wall skeleton; a reinforcing plate is arranged between the adjacent door upright posts, and is connected with the end wall upright posts for increasing the strength of the door upright posts;

the end wall plate is tiled on the end wall skeleton, and the end wall plate is connected with the end wall skeleton through resistance spot welding.

Optionally, in the stainless steel end wall, a threshold is arranged at the bottom of the end wall skeleton; the threshold comprises a first U-shaped beam and a second U-shaped beam; the second U-shaped beam is nested in the first U-shaped beam and is used for improving the strength of the threshold; and plug welding holes are formed in the first U-shaped beam and are used for connecting the threshold and the underframe of the vehicle body in a plug welding mode.

Optionally, in the stainless steel end wall, a groove clamped with the door upright post is formed in the threshold; the junction of door stand with the threshold is provided with the reinforcement piece, the reinforcement piece is used for reducing the door stand with the stress concentration of the junction of threshold.

Optionally, in the stainless steel end wall, a supporting piece is arranged inside the second U-shaped beam; the support member is fixed in the second U-shaped beam through a reinforcing bottom plate and is used for improving the rigidity of the doorsill.

Optionally, in the stainless steel end wall, the supporting piece is a few type supporting pieces, and the few type supporting pieces are formed by bending metal plates.

Optionally, in the stainless steel end wall, a plurality of longitudinal reinforcing beams are arranged at the top of the end wall skeleton, and each longitudinal reinforcing beam is uniformly distributed; a transverse reinforcing beam is arranged between the adjacent longitudinal reinforcing beams; the longitudinal reinforcing beams and the transverse reinforcing beams are used for increasing the strength and rigidity of the top of the end wall skeleton.

Optionally, in the stainless steel end wall, the transverse reinforcing beam comprises at least two convex ribs; the convex rib is abutted with the longitudinal reinforcing beam.

Optionally, in the stainless steel end wall, a reinforcing corner piece is arranged at a corner of the end wall framework; the first side of the reinforcing corner fitting is connected with the longitudinal reinforcing beam; the second side of the reinforcement corner fitting is connected with the headwall corner post.

Optionally, in the stainless steel end wall, a system component is arranged on the end wall framework; the system component comprises a key hole component, a C-shaped groove and a base plate; the key hole component is arranged on the door upright post positioned at the side edge of the door opening and is used for installing vehicle interior decoration and electrical equipment; the C-shaped groove is arranged at the top of the end wall skeleton and is used for installing the interior decoration of the vehicle; the backing plate is arranged between the adjacent door uprights and is used for installing a through passage between vehicles.

Optionally, in the stainless steel end wall, the keyhole assembly includes a bottom plate and a limiting member; a key hole is formed in the bottom plate; the limiting piece is fixed at the position of the key hole of the bottom plate and used for limiting the rotation of the head of the bolt.

Optionally, in the stainless steel end wall, the end wall plate includes a first end plate, a second end plate, and a third end plate; the second end plate is positioned between the first end plate and the third end plate; the first end plate and the third end plate are respectively connected with the second end plate in a laser welding mode.

Optionally, in the stainless steel end wall, an outer surface state of the end wall plate is a BG80 state.

A rail vehicle comprising a stainless steel headwall, the stainless steel headwall being as defined in any one of the preceding claims.

The stainless steel end wall provided by the utility model is provided with an end wall framework, and the end wall framework comprises end wall corner posts and a plurality of door upright posts. An end wall column is arranged between the door column and the end wall corner column to improve the strength of the end wall skeleton. A reinforcing plate is arranged between the adjacent door columns and is connected with the end wall columns so as to increase the strength of the door columns. The end wall plate is paved on the end wall skeleton and is connected to the end wall skeleton in a resistance spot welding mode, so that the connection strength of the end wall plate and the end wall skeleton is ensured, and the surface quality of the end wall plate is ensured.

Compared with the prior art, the stainless steel end wall provided by the utility model has the advantages that the end wall upright posts are arranged between the door upright posts and the end wall corner posts, so that the strength of the end wall skeleton is improved, meanwhile, the reinforcing plates are arranged between the adjacent door upright posts, so that the strength of the door upright posts is increased, the end wall skeleton is prevented from being deformed in torsion, the strength of the end wall skeleton is further increased, the end wall plate is fixedly connected with the end wall skeleton in a resistance spot welding mode, the connection strength of the end wall plate and the end wall skeleton is ensured, and the surface quality of the end wall plate is also ensured.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only embodiments of the present application, and other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of an end wall skeleton according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a corner post according to an embodiment of the present utility model;

fig. 3 is a schematic connection diagram of a door pillar and a reinforcing plate according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a threshold according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a key hole assembly according to an embodiment of the present utility model;

FIG. 6 is a schematic view of an end wall panel according to an embodiment of the present utility model;

fig. 7 is a schematic drawing of a drawing direction of an end wall plate according to an embodiment of the present utility model.

Wherein 100 is an end wall skeleton, 101 is an end wall corner post, 102 is an end wall post, 103 is a door post, 1031 is a connecting part, 104 is a reinforcing plate, 1041 is an extending part, 105 is a threshold, 1051 is a first U-shaped beam, 1052 is a second U-shaped beam, 1053 is a reinforcing bottom plate, 1054 is a supporting piece, 1055 is a groove, 106 is a transverse reinforcing beam, 107 is a longitudinal reinforcing beam, 108 is an end top bending beam, 109 is a C-shaped groove, 1091 is a key hole assembly, 1092 is a base plate, 1093 is a limiting piece, 110 is a reinforcing corner piece, 111 is a reinforcing block, 200 is an end wall plate, 201 is a first end plate, 202 is a second end plate, 203 is a third end plate, and 300 is a plug welding hole.

Detailed Description

The utility model aims at providing a stainless steel end wall so as to improve the strength of the stainless steel end wall;

another core of the present utility model is to provide a rail vehicle having the stainless steel headwall described above.

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

As shown in fig. 1 and 6, an embodiment of the present utility model discloses a stainless steel end wall, including an end wall skeleton 100 and end wall boards 200. It should be noted that, the end wall skeleton 100 and the end wall board 200 are symmetrically distributed along the central axis, and the following embodiments are explained and illustrated only by the end wall skeleton 100 and the end wall board 200 on one side of the central axis.

The headwall framework 100 comprises a headwall corner post 101 and a plurality of door posts 103. As shown in fig. 2, the end wall corner post 101 is formed by combining two end wall corner posts through a resistance spot welding mode, and a plug welding hole 300 is formed in the side surface of the end wall corner post 101, and is connected and fixed with a side wall of a vehicle body through a plug welding mode when the vehicle body is synthesized. In the present embodiment, there are two door posts 103, and a headwall post 102 is provided between the door posts 103 and the headwall corner posts 101, and the headwall post 102 is used to improve the strength of the headwall skeleton 100. A reinforcing plate 104 is arranged between the adjacent door uprights 103, and the reinforcing plate 104 is connected with the end wall uprights 102 for increasing the strength of the door uprights 103 and simultaneously increasing the flatness of the paved wall surface. Specifically, as shown in fig. 3, the door pillar 103 is provided with a connection portion 1031, the reinforcing plate 104 is fixed to the connection portion 1031 of the adjacent door pillar 103 by means of resistance spot welding, and the reinforcing plate 104 has an extension portion 1041, and the reinforcing plate 104 is connected to the end wall pillar 102 by means of the extension portion 1041, and since the door pillar 103 and the end wall pillar 102 are tied to each other by means of the reinforcing plate 104, the end wall panel 200 is resistant to torsional deformation, and the strength of the stainless steel end wall is improved. It should be noted that, the cross section of the end wall corner post 101 is larger than the cross section of the end wall corner post 101 in the prior art, so as to ensure the overall size and shape of the stainless steel end wall, and the welding deformation can be reduced by arc welding compared with resistance spot welding.

The end wall board 200 is tiled on the end wall skeleton 100 and is positioned at the outer side of the end wall skeleton 100, and the end wall board 200 is connected with the end wall skeleton 100 through resistance spot welding, so that the connection strength of the end wall board 200 and the end wall skeleton 100 is ensured, and the flatness and quality of the surface of the end wall board 200 are ensured. The outer side of the headwall skeleton 100 refers to the inner side of the vehicle body, i.e., the outer side of the tail portion of the head car or the outer sides of the head and tail ends of the intermediate car.

The stainless steel end wall provided by the utility model is provided with an end wall skeleton 100, and the end wall skeleton 100 comprises end wall corner posts 101 and a plurality of door posts 103. A headwall post 102 is provided between the door post 103 and the headwall corner post 101 to improve the strength of the headwall framework 100. A reinforcing plate 104 is provided between the adjacent door uprights 103, and the reinforcing plate 104 is connected with the headwall uprights 102 to increase the strength of the door uprights 103. The end wall plate 200 is tiled on the end wall skeleton 100 and is connected to the end wall skeleton 100 in a resistance spot welding mode, so that the connection strength of the end wall plate 200 and the end wall skeleton 100 is ensured, and the surface quality of the end wall plate 200 is also ensured.

Compared with the prior art, the stainless steel end wall provided by the utility model has the advantages that the end wall upright posts 102 are arranged between the door upright posts 103 and the end wall corner posts 101, so that the strength of the end wall skeleton 100 is improved, meanwhile, the reinforcing plates 104 are arranged between the adjacent door upright posts 103, so that the strength of the door upright posts 103 is increased, the end wall skeleton 100 is prevented from being deformed in torsion, the strength of the end wall skeleton 100 is further improved, the end wall plate 200 is fixedly connected with the end wall skeleton 100 in a resistance spot welding mode, the connection strength of the end wall plate 200 and the end wall skeleton 100 is ensured, and the surface quality of the end wall plate 200 is also ensured.

Further, as shown in fig. 1 and 4, the bottom of the headwall skeleton 100 is provided with a threshold 105. Wherein the threshold 105 comprises a first U-beam 1051 and a second U-beam 1052, and the second U-beam 1052 is nested within the first U-beam 1051 for increasing the strength of the threshold 105. The first U-beam 1051 is provided with a plug welding hole 300 for connecting the threshold 105 and the chassis of the vehicle body in a plug welding manner. Specifically, as shown in fig. 4, the first U-shaped beam 1051 includes a first bending portion and a second bending portion, and the width of the second bending portion is greater than that of the first bending portion, and the plug welding hole 300 is formed in the second bending portion, so that the second bending portion and the chassis of the vehicle body are connected by plug welding. The second U-beam 1052 includes a third bending portion and a fourth bending portion, and the width of the first bending portion, the width of the third bending portion, and the width of the fourth bending portion are equal. When the second U-beam 1052 is nested in the first U-beam 1051, the first bending portion and the third bending portion are connected by means of resistance spot welding, and the second bending portion and the fourth bending portion are connected by means of resistance spot welding, so that the inner and outer sleeved structural forms of the first U-beam 1051 and the second U-beam 1052 are realized, and the strength of the threshold 105 is improved.

Further, as shown in fig. 4, in a specific embodiment, a support 1054 is disposed inside the second U-shaped beam 1052, and the support 1054 is fixed inside the second U-shaped beam 1052 by a reinforcing floor 1053 for enhancing the rigidity of the rocker 105. Specifically, the support 1054 is a table-type support, which is formed by bending a sheet metal. Wherein, several type support piece includes connecting plate and bending end, and several type support piece's connecting plate is fixed in the fourth kink of second U type roof beam 1052 through strengthening bottom plate 1053, and several type support piece's bending end is fixed in the third kink of second U type roof beam 1052 through resistance spot welding's mode. By providing several types of support members inside the second U-beam 1052, the rigidity of the rocker 105 is improved, while the compression and tension resistance of the rocker 105 in the longitudinal direction of the vehicle body is enhanced. It should be noted that the support 1054 may be other types of supports, such as a b-type support, and several types of supports are preferred in this embodiment.

Further, as shown in fig. 4, both ends of the threshold 105 are provided with grooves 1055 that are engaged with the door pillars 103. When the door sill 105 is installed, as shown in fig. 1, the grooves 1055 at both ends of the door sill 105 are exactly clamped with the outer surface of the door pillar 103 at the edge of the door opening, and a reinforcing block 111 is provided at the junction of the door pillar 103 and the door sill 105, and the reinforcing block 111 is used for reducing stress concentration at the junction of the door pillar 103 and the door sill 105. It should be noted that, the reinforcing block 111 is a solid block with a right-angle structure, and an arc surface recessed toward the inner side of the reinforcing block 111 is formed on the inclined surface of the reinforcing block 111, so as to reduce stress concentration at the joint of the door pillar 103 and the door sill 105, and simultaneously, the two right-angle surfaces of the reinforcing block 111 are welded and fixed with the door sill 105 and the door pillar 103 respectively, so that the connection strength between the door pillar 103 and the door sill 105 is increased.

Further, as shown in fig. 1, in an embodiment, a plurality of longitudinal reinforcing beams 107 are disposed at the top of the end wall skeleton 100, and each longitudinal reinforcing beam 107 is uniformly distributed, and a transverse reinforcing beam 106 is disposed between adjacent longitudinal reinforcing beams 107. Wherein the longitudinal reinforcing beams 107 and the transverse reinforcing beams 106 are used to increase the strength and rigidity of the top of the headwall framework 100. Specifically, the transverse reinforcing beam 106 includes at least two ribs, in this embodiment, two ribs are provided, and two ends of each rib are respectively abutted with the longitudinal reinforcing beams 107 located at two sides of the transverse reinforcing beam 106, so as to restrict the transverse deformation of the longitudinal reinforcing beams 107, thereby improving the strength and rigidity of the top of the end wall skeleton 100. An end top bent beam 108 is further arranged above the transverse reinforcing beams 106 and between the adjacent longitudinal reinforcing beams 107, and the end top bent beam 108 is attached to the cambered surface of the top of the end wall skeleton 100 to provide support for the cambered surface shape of the top of the end wall skeleton 100.

Further, as shown in fig. 1, the corner of the end wall skeleton 100 is provided with a reinforcing corner fitting 110, a first side of the reinforcing corner fitting 110 is connected with a longitudinal reinforcing beam 107, and a second side of the reinforcing corner fitting 110 is connected with an end wall corner post 101, so as to improve the integrity of the end wall skeleton 100, and meanwhile, increase the strength of the corner of the end wall skeleton 100, prevent the corner of the end wall skeleton 100 from being deformed during transportation and assembly, and thus affect the appearance quality of the stainless steel end wall.

Further, as shown in fig. 1, a system component is provided on the headwall skeleton 100. The system components include, among other things, a keyhole component 1091, a C-shaped slot 109, and a backing plate 1092. The key hole subassembly 1091 is a plurality of, and each key hole subassembly 1091 sets up respectively on the door stand 103 that is located the door opening side for install vehicle interior decoration and electrical equipment, C type groove 109 is a plurality of, and each C type groove 109 sets up in the top of headwall skeleton 100, and is located the below of vertical reinforcing beam 107 respectively for install the interior decoration of vehicle, backing plate 1092 is a plurality of, and each backing plate 1092 sets up between adjacent door stand 103 for install the through-passage between the vehicle. It should be noted that the functions and the assembly manners of the keyhole component 1091, the C-shaped groove 109 and the pad 1092 are all prior art, and are not described herein.

In order to prevent the slipping of the bolt during the fixing of the bolt, as shown in fig. 5, in an embodiment, the keyhole component 1091 includes a bottom plate and a limiting member 1093, where a keyhole is formed on the bottom plate, and the limiting member 1093 is fixed at the position of the keyhole of the bottom plate for limiting the rotation of the head of the bolt. Specifically, the limiting member 1093 is provided with a limiting groove, and the inner width of the limiting groove is controlled between the width of the opposite side of the head of the bolt and the width of the opposite corner of the head of the bolt. When the bolt head slides into the limit groove from the key hole, and the nut on the bolt is rotated, the inner width dimension of the limit groove is smaller than the width of the opposite angle of the bolt head, so that when the opposite angle of the bolt head is rotated to be abutted with the inner side wall of the limit groove, the limit groove can limit the bolt head to continuously rotate, and the bolt slipping when the bolt is fixed is effectively avoided. It should be noted that, the limiting member 1093 in this embodiment is suitable for a bolt with an edge, such as a hexagon bolt, and the limiting member 1093 is fixed on the bottom plate by welding, and of course, the limiting member 1093 may also be matched with a chute welded on the bottom plate, and be detachably connected to the bottom plate, so that when the fixing of the bolt is completed, the limiting member 1093 may be detached, so as to facilitate the use of the bolts at other positions during the fixing.

Further, as shown in fig. 6, the end wall panel 200 includes a first end plate 201, a second end plate 202, and a third end plate 203. The second end plate 202 is located between the first end plate 201 and the third end plate 203, and the first end plate 201 and the third end plate 203 are connected to the second end plate 202 by laser welding. It should be noted that, the laser welding mode has low heat input and small welding deformation, and the end wall board 200 welded by laser has good appearance quality and outer surface flatness, so that the flatness requirement of the through-channel installation can be ensured, the tightness of the stainless steel end wall is improved, and good appearance quality can be provided for the exposed surface of the stainless steel end wall.

Further, as shown in fig. 6 and 7, the outer surface state of the end wall plate 200 is BG80 state. The BG80 state is a surface state, specifically, a quality state obtained by rubbing with 80-mesh sand paper along the same direction, and the appearance quality of the BG80 state is better than that of the existing 2B state. The arrow direction shown in fig. 7 is the drawing direction of the exposed surface of the end wall board 200, and the drawing direction of the exposed surface of the end wall board 200 is consistent with the drawing direction of the side wall of the vehicle body, so that the exposed surface of the whole vehicle body is consistent, attractive and tidy.

Further, in one embodiment, it can be found by numerical simulation of the stainless steel end wall when it is subjected to longitudinal compression that the maximum von Mises stress occurs when the end wall corner post 101 is 359.672MPa and the end wall corner post 101 is made of SUS301L-1/2H, and the yield strength is equal to or greater than 410MPa when the compression load of the stainless steel end wall is 150 kN. Therefore, the stainless steel end wall has reasonable structural arrangement, proper material selection and meets the structural strength requirement.

The embodiment of the utility model also discloses a railway vehicle, which comprises the stainless steel end wall disclosed in the embodiment, so that the railway vehicle has all the technical effects of the stainless steel end wall, and the description is omitted herein.

The terms first and second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to the listed steps or elements but may include steps or elements not expressly listed.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. 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 utility model. Thus, the present utility model 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 (13)

1. A stainless steel headwall, comprising:

an end wall skeleton (100); the end wall framework (100) comprises end wall corner posts (101) and a plurality of door upright posts (103); an end wall upright post (102) is arranged between the door upright post (103) and the end wall corner post (101), and the end wall upright post (102) is used for improving the strength of the end wall framework (100); a reinforcing plate (104) is arranged between the adjacent door uprights (103), and the reinforcing plate (104) is connected with the end wall uprights (102) and used for increasing the strength of the door uprights (103);

the end wall plate (200) is tiled on the end wall skeleton (100), and the end wall plate (200) is connected with the end wall skeleton (100) through a resistance spot welding mode.

2. The stainless steel headwall according to claim 1, characterized in that the bottom of the headwall skeleton (100) is provided with a threshold (105); the threshold (105) comprises a first U-beam (1051) and a second U-beam (1052); the second U-shaped beam (1052) is nested in the first U-shaped beam (1051) and is used for improving the strength of the doorsill (105); and a plug welding hole (300) is formed in the first U-shaped beam (1051) and is used for connecting the threshold (105) with the underframe of the vehicle body in a plug welding mode.

3. The stainless steel headwall according to claim 2, characterized in that the threshold (105) is provided with a groove (1055) that is snap-fit with the door post (103); the door pillar (103) is provided with a reinforcing block (111) at the joint of the door pillar (105), and the reinforcing block (111) is used for reducing stress concentration at the joint of the door pillar (103) and the door sill (105).

4. The stainless steel headwall of claim 2, wherein the second U-beam (1052) is internally provided with a support (1054); the support (1054) is secured within the second U-beam (1052) by a reinforcing floor (1053) for increasing the stiffness of the rocker (105).

5. The stainless steel headwall of claim 4, wherein the support (1054) is a table-type support formed by bending sheet metal.

6. The stainless steel headwall according to claim 1, characterized in that a plurality of longitudinal reinforcing beams (107) are arranged at the top of the headwall skeleton (100), and each longitudinal reinforcing beam (107) is uniformly distributed; a transverse reinforcing beam (106) is arranged between the adjacent longitudinal reinforcing beams (107); the longitudinal reinforcing beams (107) and the transverse reinforcing beams (106) are used for increasing the strength and rigidity of the top of the end wall skeleton (100).

7. The stainless steel headwall of claim 6, wherein the lateral stiffening beam (106) includes at least two ribs; the convex rib is abutted with the longitudinal reinforcing beam (107).

8. The stainless steel headwall of claim 6, wherein the corners of the headwall skeleton (100) are provided with reinforcing corner pieces (110); a first side of the reinforcement corner fitting (110) is connected with the longitudinal reinforcement beam (107); the second side of the reinforcement corner fitting (110) is connected to the headwall corner post (101).

9. The stainless steel headwall of claim 1, wherein the headwall skeleton (100) has system components disposed thereon; the system assembly comprises a key hole assembly (1091), a C-shaped groove (109) and a base plate (1092); the key hole assembly (1091) is arranged on the door upright post (103) positioned at the side edge of the door opening and is used for installing vehicle interior decoration and electrical equipment; the C-shaped groove (109) is arranged at the top of the end wall skeleton (100) and is used for installing the interior decoration of a vehicle; the backing plate (1092) is arranged between adjacent door uprights (103) and is used for installing a through passage between vehicles.

10. The stainless steel headwall of claim 9, wherein the keyhole assembly (1091) includes a bottom plate and a retainer (1093); a key hole is formed in the bottom plate; and the limiting piece (1093) is fixed at the position of the key hole of the bottom plate and is used for limiting the rotation of the head of the bolt.

11. The stainless steel end wall according to claim 1, wherein the end wall plate (200) comprises a first end plate (201), a second end plate (202) and a third end plate (203); -the second end plate (202) is located between the first end plate (201) and the third end plate (203); the first end plate (201) and the third end plate (203) are respectively connected with the second end plate (202) by means of laser welding.

12. The stainless steel end wall according to claim 11, characterized in that the outer surface condition of the end wall plate (200) is BG80 condition.

13. A rail vehicle comprising a stainless steel headwall, wherein the stainless steel headwall is a stainless steel headwall according to any one of claims 1 to 12.

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