WO2020173419A1

WO2020173419A1 - Multiple unit and vehicle body end chassis structure thereof

Info

Publication number: WO2020173419A1
Application number: PCT/CN2020/076539
Authority: WO
Inventors: 李林; 尹华; 王成强; 毛哲骞; 任延静
Original assignee: 中车长春轨道客车股份有限公司
Priority date: 2019-02-26
Filing date: 2020-02-25
Publication date: 2020-09-03
Also published as: SG11202007894RA; EP3744607A1; EP3744607A4

Abstract

A multiple unit and a vehicle body end chassis structure thereof, the vehicle body end chassis structure comprising a coupler base plate (3), a traction beam assembly (6), a front end plate (1), and a coupler box (7), the coupler base plate (3) being used for mounting a coupler; the coupler box (7) and the traction beam assembly (6) are respectively connected to the coupler base plate (3) from the front and rear sides of the coupler base plate (3), and the top of the coupler box (7) and the traction beam assembly (6) are used for fixed connection to a vehicle body chassis floor plate (2); the front end plate (1) is arranged on the side of the coupler box (7) furthest from the coupler base plate (3), the front end plate (1) being provided with a through hole (104) for the coupler to extend through and operate; and a hoisting interface (8) for hoisting an external hanging device is arranged on the traction beam assembly (6) and/or the coupler box (7). The present vehicle body end chassis structure can prevent the concentration of stress at the coupler mounting position, and also provides a hoisting function, being beneficial for the layout of the lower structure of the vehicle body.

Description

EMU and its body end underframe structure

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on February 26, 2019, the application number is 201910141782.3, and the invention title is "an EMU and its body end underframe structure", the entire content of which is incorporated by reference Incorporated in this application.

This application is required to be submitted to the China Patent Office on February 26, 2019. The application number is

201920243949.2, the priority of the Chinese patent application with the title of "an EMU and its body end underframe structure", the entire content of which is incorporated into this application by reference.

Technical rice field

The present invention relates to the technical field of rail vehicles, in particular to an EMU and its car body end underframe structure. Background technology

The underframe of the vehicle body is the main part of the vehicle body. In addition to participating in the vertical bearing of the underframe, the end structure of the underframe mainly bears the longitudinal bearing of the underframe, and evenly transmits the traction and braking force from the longitudinal direction of the vehicle to the entire underframe. Frame or even the car body. In addition to the longitudinal force transmission interface between vehicles, the end structure of the underframe is also provided with electrical and other connection interfaces between the vehicles. Therefore, the installation structure of the end structure of the underframe is more complicated and needs to have sufficient strength to be very strong with the underframe. A good connection is integrated, and the corresponding installation interface needs to be set reasonably. Therefore, how to provide a vehicle body end underframe structure becomes an important technical problem to be solved urgently by those skilled in the art. Summary of the invention

In view of this, the first object of the present invention is to provide an EMU body end underframe structure, and the second object of the present invention is to provide an EMU including the above body end underframe structure.

In order to achieve the above objective, the present invention provides the following technical solutions:

An EMU car body end underframe structure, including:

Coupler seat plate for installing coupler;

A traction beam assembly arranged on the rear side of the coupler seat plate and connected with the coupler seat plate, the top of the traction beam assembly is used for fixed connection with the underframe floor of the vehicle body;

A coupler box arranged on the front side of the coupler seat plate and connected with the coupler seat plate, the coupler box The top is used for fixed connection with the underframe floor of the vehicle body, the end of the coupler box away from the coupler seat plate is provided with a front end plate, and the front end plate is provided with a through hole for the coupler to extend and work;

The traction beam assembly and/or the coupler box are provided with a hoisting interface for hoisting external equipment.

Preferably, the traction beam assembly includes a traction beam, the traction beam includes a traction beam top plate and two traction beam side plates, the traction beam top plate and the two traction beam side plates enclose a trough structure, the The top plate of the traction beam is used for fixed connection with the underframe floor of the car body.

Preferably, the traction beam further includes a transverse partition, both sides of the transverse partition are respectively connected to the two traction beam side plates, and the transverse partition extends along the length direction of the traction beam.

Preferably, the top plate of the traction beam is provided with a through groove for increasing the welding position between the top plate of the traction beam and the floor of the vehicle body underframe.

Preferably, the coupler seat plate is an I-shaped structure, the traction beam top plate is connected to the upper wing plate of the coupler seat plate, and the two traction beam side plates are connected to the webs of the coupler seat plate.

Preferably, the top plate of the traction beam and the upper wing plate of the coupler seat plate are connected through a first transitional connecting plate, and the first transitional connecting plate is used for fixed connection with the underframe floor of the vehicle body.

Preferably, a side of the upper wing plate of the coupler seat plate away from the traction beam is connected with a second transition connecting plate, and the second transition connecting plate is used for fixed connection with the underframe floor of the vehicle body.

Preferably, the lower wing plate of the coupler seat plate is connected with a traction beam cover plate, and the traction beam cover plate is connected to the two traction beam side plates from bottom to top.

Preferably, the coupler box includes a coupler box bottom plate and two coupler box side plates, the coupler box bottom plate is connected to the lower wing plate of the coupler seat plate, the two coupler box side plates and the coupler seat plate The coupler box bottom plate, the coupler seat plate, the front end plate, and the two coupler box side plates can be matched with the underframe floor of the vehicle body to form a container that communicates with the outside through only the through hole Cavity.

Preferably, the front end plate includes a main body and two T-shaped connecting pieces, the through hole is provided in the main body, and the two T-shaped connecting pieces are respectively arranged on both sides of the main body, and the T-shaped connecting pieces The horizontal plate is connected with the main body, and the vertical plate of the T-shaped connector is connected with the side plate of the coupler box.

Preferably, the front end plate further includes a transverse mounting plate connected to the main body and the lower ends of the two T-shaped connectors, and the inner side of the transverse mounting plate is provided with a vehicle body underframe. C-shaped chute on the end bottom plate. Preferably, the traction beam assembly includes a plurality of the traction beams, and the plurality of the traction beams are connected to the rear side of the coupler seat plate side by side and spaced apart from each other.

Preferably, the hoisting interface is provided at least on the side plates of the traction beams on the two sides of the traction beam assembly that are away from each other.

Preferably, the hoisting interface is used to set the mounting surface that cooperates with the external hanging device downwards, and the hoisting interface is provided with a chute corresponding to the mounting surface, and the chute is used to place a slider and a hoisting bolt It extends into the chute and cooperates with the slider to hoist the external hanging device on the hoisting interface.

Preferably, the outer surface of the front end plate and the outer surface of the end wall of the vehicle body underframe are the same end surface. Preferably, the front end plate is provided with an electrical connector mounting structure on both sides of the through hole, the electrical connector mounting structure includes a box-shaped box opened in the same direction as the through hole, and an upper part of the box-shaped box The top wall is provided with a wire passing hole and a mounting hole opened around the wire passing hole.

Preferably, the upper top wall of the box-shaped box slopes downward from one end on the outer surface of the front end plate to form an inclination angle.

Preferably, both ends of the inner side surface of the front end plate are respectively provided with a stepped boss structure for matching with the side skirt plate of the vehicle body end to compress the sealing rubber strip.

An EMU includes the underframe structure at the end of the EMU body as described above.

To sum up, the present invention provides an EMU car body end underframe structure. The EMU car body end underframe structure includes a coupler seat plate, a traction beam assembly, and a coupler box, wherein the coupler seat plate is used to install the coupler It is arranged perpendicular to the longitudinal direction of the car body to transmit the longitudinal force of the coupler; the traction beam assembly is arranged on the rear side of the coupler seat plate and connected with the coupler seat plate. Here, the rear side of the coupler seat plate refers to the end of the coupler seat plate facing away from the car body. On the side, the top of the traction beam assembly is used for fixed connection with the underframe floor of the car body; the coupler box is arranged on the front side of the coupler seat plate and connected with the coupler seat plate, the top of the coupler box is used for fixed connection with the underframe floor of the car body, the coupler box The end far away from the coupler seat plate is provided with a front end plate, and the front end plate is provided with a through hole for the coupler to extend and work. When the through hole is opened, the swing of the coupler during operation of the vehicle needs to be considered; the traction beam assembly and/or the coupler box There is a hoisting interface for hoisting external equipment, including but not limited to dirt bins, electrical components, etc.;

In application, the above-mentioned car body end underframe structure is installed on the floor of the car body underframe, and the coupler is installed on the coupler seat plate and protrudes from the through hole on the front end plate to cooperate with the coupler structure on the other car body. , The coupler seat plate is arranged horizontally, that is, perpendicular to the length of the car body, which can transmit the longitudinal force on the coupler to the coupler seat The components such as the traction beam components connected to the plates are transmitted to the car body under the combined action of improving the force and avoiding stress concentration at the coupler installation. At the same time, the hoisting interface integrated on the underframe structure of the car body can be a dirt box, electrical components, etc. Provide hoisting function, which is helpful for the layout of the lower structure of the car body.

The present invention also provides an EMU. The EMU includes the above-mentioned EMU car body end underframe structure. Since the above EMU car body end underframe structure has the above technical effects, the EMU car body EMUs with body-end underframe structure should also have corresponding technical effects. Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings may be obtained based on these drawings without creative work.

Figure 1 is a front view of the underframe structure at the end of the EMU car body provided by an embodiment of the present invention;

Figure 2 is a sectional view of A-A in Figure 1;

Figure 3 is a top view of the underframe structure of the car body end of the EMU provided by the embodiment of the present invention;

Figure 4 is a sectional view of B-B in Figure 3;

Figure 5 is a cross-sectional view of C-C in Figure 3;

Figure 6 is a cross-sectional view of D-D in Figure 3;

Fig. 7 is a schematic structural diagram of the coupler seat plate of the underframe structure of the body end of the EMU provided by the embodiment of the present invention;

Fig. 8 is a schematic structural diagram of a traction beam with a hoisting interface provided by an embodiment of the present invention; Fig. 9 is a structural schematic diagram of a traction beam without a hoisting interface provided by an embodiment of the present invention; Fig. 10 is an EMU car provided by an embodiment of the present invention Schematic diagram of the transverse mounting plate of the body end underframe structure;

Figure 11 is a schematic structural diagram of a T-shaped connector of the underframe structure at the end of the EMU car body provided by an embodiment of the present invention;

Figure 12 is a front view of the EMU car body end underframe structure provided by the embodiment of the present invention when the windshield is installed;

Figure 13 is a cross-sectional view of EE in Figure 12; 14 is a schematic structural view of the traction beam of the underframe structure at the end of the EMU car body provided by the embodiment of the present invention when hoisting the dirt box;

Figure 15 is a schematic diagram of the structure of the coupler box of the underframe structure at the body end of the EMU provided by the embodiment of the present invention when the dirt box is hoisted.

In the picture:

1 is the front panel; 101 is the main body; 102 is the horizontal mounting plate; 103 is the T-shaped connector; 104 is the through hole; 105 is the box-shaped box; 106 is the cable hole; 107 is the mounting hole; 108 is the C-shaped sliding groove 109 is a stepped boss structure; 110 and 111 are thickened areas; 2 is the underframe floor of the car body; 3 is the coupler seat plate; 301 is the upper wing plate; 302 is the web; 303 is the lower wing plate; A transitional connecting plate; 5 is the second transitional connecting plate; 6 is the traction beam; 601 is the top plate of the traction beam; 602 is the side plate of the traction beam; 603 is the diaphragm; 604 is the traction beam cover; 605 is the through groove; 7 It is the coupler box; 701 is the side panel of the coupler box; 702 is the bottom plate of the coupler box; 8 is the hoisting interface; 9 is the cable; 10 is the windshield; 11 is the dirt box. detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Please refer to Figures 1 to 3, Figure 1 is a front view of an EMU car body end underframe structure provided by an embodiment of the present invention, Figure 2 is a cross-sectional view AA in Figure 1, and Figure 3 is an EMU provided by an embodiment of the present invention The top view of the underframe structure of the car body end.

The embodiment of the present invention provides an EMU body end underframe structure. The EMU body end underframe structure includes a coupler seat plate 3, a traction beam assembly, and a coupler box 7.

The coupler seat plate 3 is used to install the coupler and is arranged perpendicular to the longitudinal direction of the vehicle body to transmit the longitudinal force of the coupler; the traction beam assembly is arranged on the rear side of the coupler seat plate 3 and connected to the coupler seat plate 3, where the coupler seat plate 3 is behind The side refers to the side of the coupler seat plate 3 facing away from the end of the car body, and the top of the traction beam assembly is used for fixed connection with the underframe floor 2 of the car body; the coupler box 7 is arranged on the front side of the coupler seat plate 3 and is connected to the coupler seat plate 3 The top of the coupler box 7 is used for fixed connection with the underframe floor 2 of the car body. The end of the coupler box 7 away from the coupler seat plate 3 is provided with a front end plate 1, and the front end plate 1 is provided with a passage for the coupler to extend and work. Hole 104, it's time to pass The opening of the hole 104 also needs to consider the swing of the coupler when the vehicle is running; the traction beam assembly and/or the coupler box 7 are provided with a hoisting interface 8 for hoisting external equipment, as shown in Figures 3-5, the external equipment includes but is not limited to Dirt box 11, electrical components, etc.

Compared with the prior art, the EMU car body end underframe structure provided by the embodiment of the present invention is installed on the underframe floor 2 of the car body during application, and the coupler is installed on the coupler seat plate 3 from the through hole on the front end plate 1. 104 extends to fit and connect with the coupler structure on another car body. The coupler seat plate 3 is arranged horizontally, that is, perpendicular to the length of the car body, and the longitudinal force on the coupler can be passed through the traction beam assembly connected to the coupler seat plate 3. Under the joint action of other components, it is transmitted to the car body to improve the force and avoid the stress concentration at the coupler installation. At the same time, the hoisting interface 8 integrated on the car body end underframe structure can make the car body end underframe structure have a hoisting function for hoisting The dirt box 11, electrical components and other equipment, thereby contributing to the layout of the lower structure of the vehicle body.

The traction beam assembly may be composed of one traction beam 6 or a plurality of traction beams 6. Preferably, in the embodiment of the present invention, the traction beam assembly includes a plurality of traction beams 6, and the plurality of traction beams 6 are arranged side by side. They are connected to the rear side of the coupler seat plate 3 at intervals.

Further, as shown in FIGS. 2 to 4, the above-mentioned traction beam 6 includes a traction beam top plate 601 and two traction beam side plates 602. The traction beam top plate 601 and the two traction beam side plates 602 enclose a trough structure, namely two Two traction beam side plates 602 are symmetrically connected to both sides of the traction beam top plate 601, and the traction beam top plate 601 is used for fixed connection with the underframe floor 2 of the vehicle body. During application, the opening of the trough structure faces downward toward the ground.

In order to enhance the strength of the traction beam 6, in the embodiment of the present invention, the traction beam 6 further includes a transverse partition 603. The two sides of the transverse partition 603 are respectively connected to two traction beam side plates 602 and the transverse partition 603 runs along the traction beam. 6 Lengthwise extension.

To further optimize the above technical solution, in the embodiment of the present invention, as shown in FIG. 3, a through groove 605 is provided on the top plate 601 of the traction beam, and the through groove 605 is provided with a plurality of through grooves 605 along the length direction of the top plate 601 of the traction beam. The function of the groove 605 is to increase the welding position between the top plate 601 of the traction beam and the floor 2 of the car body underframe. When in use, in addition to the welding between the edge of the top plate 601 of the traction beam and the floor 2 of the car body The edge of the through groove 605 welds the top plate 601 of the traction beam with the underframe of the vehicle body to improve the connection strength between the traction beam 6 and the underframe floor 2 of the vehicle body.

As shown in FIG. 3, the shape of the through groove 605 is a waist shape. Of course, in other embodiments, the through groove 605 may also adopt other shapes, such as rectangle, diamond, circle, ellipse, etc., which are not limited here. .

Preferably, in the embodiment of the present invention, as shown in FIG. 7, the coupler seat plate 3 has an I-shaped structure, The traction beam top plate 601 is connected to the upper wing plate 301 of the coupler seat plate 3, and the two traction beam side plates 602 are connected to the web 302 of the coupler seat plate 3.

In order to enhance the connection strength between the coupler seat plate 3 and the vehicle body underframe floor 2, in the embodiment of the present invention, the top plate 601 of the traction beam and the upper wing plate 301 of the coupler seat plate 3 are connected by a first transition connecting plate 4 , The first transitional connecting plate 4 is used for fixed connection with the underframe floor 2 of the vehicle body.

Further, a side of the upper wing plate 301 of the coupler seat plate 3 away from the traction beam 6 is connected with a second transition connecting plate 5, and the second transition connecting plate 5 is used for fixed connection with the vehicle body underframe floor 2. The first transition connection The plate 4 and the second transitional connecting plate 5 can adopt a separate structure or an integrated structure. In use, the first transitional connecting plate 4 and the second transitional connecting plate 5 are used to reduce the longitudinal force on the coupler seat plate 3. It is transmitted to the underframe floor 2 of the vehicle body and the traction beam assembly.

Preferably, the lower wing plate 303 of the coupler seat plate 3 is connected with a traction beam cover plate 604, and the traction beam cover plate 604 is connected to two traction beam side plates 602 from bottom to top. One traction beam cover plate 604 may be provided, To seal and reinforce the entire traction beam assembly, multiple traction beams 6 in the traction beam assembly can also be provided to increase the strength of the traction beam 6.

Under the premise that the traction beam assembly includes multiple traction beams 6, there is no need to set the hoisting interface 8 on all the traction beams 6, just set the hoisting interface 8 on the corresponding traction beam 6 according to the size of the dirt box 11 As a priority, at least two traction beams 6 on both sides of the traction beam assembly can be provided with hoisting interfaces 8 on the side plates 602 of the traction beams that are far away from each other, as shown in Figs. 4, 8 and 9.

The main function of the coupler box 7 is to isolate the coupler in it from other accommodating cavities at the end of the car body, and to form a protective barrier around the coupler so that other accommodating cavities are independent of the coupler box, especially the accommodating cavity in which the electrical interface is set. In this way, the water vapor or dirt outside the vehicle is separated from other accommodating cavities at the end of the vehicle body, so as to prevent the water vapor or dirt outside the vehicle from entering the cavity to affect or damage the equipment. For this reason, in the embodiment of the present invention, as shown As shown in 2 and 3, the coupler box 7 includes a coupler box bottom plate 702 and two coupler box side plates 701. The coupler box bottom plate 702 is connected to the lower wing plate 303 of the coupler seat plate 3, the two coupler box side plates 701 and the coupler seat The web 302 of the plate 3 is connected, and the coupler box bottom plate 702, the coupler seat plate 3, the front end plate 1 and the two coupler box side plates 701 can cooperate with the underframe floor 2 of the vehicle body to form a connection with the outside through only the through hole 104 The accommodating cavity, further, a drainage structure communicating with the accommodating cavity may be provided on the coupler box 7 to drain dirt, rainwater, etc. that enter the coupler box 7 through the coupler.

It is easy for those skilled in the art to understand that welding at the corners is likely to be caused by stress concentration problems. Cracks occur and affect the welding strength. To avoid this problem, in the embodiment of the present invention, the front end plate 1 includes a main body 101 and two T-shaped connecting pieces 103. A through hole 104 for the coupler to pass through is provided in the main body 101, and the two T The connecting members 103 are respectively arranged on both sides of the main body 101, the horizontal plate of the T-shaped connecting member 103 is connected with the main body 101, and the vertical plate of the T-shaped connecting member 103 is connected with the side plate 701 of the coupler box, as shown in Figs. 3 and 11, By arranging the T-shaped connecting piece 103, the position of the welding seam between the front end plate 1 and the coupler box side plate 701 can be changed to keep it away from the intersection angle and avoid stress concentration.

To further optimize the above technical solution, as shown in Figures 1 and 10, the front end plate 1 further includes a transverse mounting plate 102, which is connected to the main body 101 and the lower ends of the two T-shaped connectors 103, and the inner side of the transverse mounting plate 102 A C-shaped chute 108 for installing the end floor of the vehicle body underframe is provided.

Since the windshield 10 needs to be installed on the front end plate 1, as shown in Figures 12 and 13, higher requirements are put forward for the strength of the installation place of the windshield 10 on the front end plate 1. Therefore, as shown in Figures 10 and 11, the horizontal installation The plate 102 and the T-shaped connecting piece 103 are respectively provided with thickened areas at the positions where the windshield 10 is installed

110, l l l o

Preferably, in order to facilitate the installation of the external device, the hoisting interface 8 is used to set the mounting surface that cooperates with the external device downwards, and the hoisting interface 8 is provided with a chute corresponding to the mounting surface, and the chute is used to place the slider, The hoisting bolts extend into the chute and cooperate with the sliding block to hoist the external equipment on the hoisting interface 8. For the hoisting structure, please refer to Figure 14 and Figure 15.

To further optimize the above technical solution, the front end plate 1 conforms to the contour of the end wall of the vehicle body underframe, and the outer surface of the front end plate 1 and the outer surface of the end wall of the vehicle body underframe are the same end surface.

Referring to Figure 1, Figure 3, Figure 4 and Figure 6, the front end plate 1 is provided with electrical connector mounting structures on both sides of the through hole 104. The electrical connector mounting structure includes a box-shaped box 105 opened in the same direction as the through hole 104. box curved path box 105 provide a space for the cable 9, on the top wall of the cassette box 105 defines a through hole 106 and a wire around the mounting hole 106 opened through the wire hole 107 _o

Preferably, the upper top wall of the box-shaped box 105 is inclined downward from one end of the outer surface of the front end plate 1 to form an inclination angle, so as to provide an inclination angle for the bending of the cable 9 and facilitate the connection of the cables 9 between two adjacent car bodies. .

As shown in Fig. 3, in the embodiment of the present invention, both ends of the inner side of the front end plate 1 are respectively provided with a stepped boss structure 109 for cooperating with the side skirt of the vehicle body to press the sealing strip.

The embodiment of the present invention also provides an EMU, the EMU includes the one described in any of the above embodiments The underframe structure of the car body end of the EMU has the above technical effects. For the technical effect of the EMU, please refer to the above embodiments.

The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this text, but should conform to the widest scope consistent with the principles and novel features disclosed in this text.

Claims

Rights request

1. An EMU car body end underframe structure, characterized in that it includes:

Coupler seat plate for installing coupler;

A coupler box arranged on the front side of the coupler seat plate and connected with the coupler seat plate, the top of the coupler box is used to be fixedly connected to the floor of the vehicle body underframe, and the coupler box is arranged at one end away from the coupler seat plate A front end plate is provided with a through hole for the coupler to extend and work;

2. The vehicle body end underframe structure of the EMU according to claim 1, wherein the traction beam assembly includes a traction beam, the traction beam includes a traction beam top plate and two traction beam side plates, and the traction beam The beam top plate and the two traction beam side plates form a trough structure, and the traction beam top plate is used for fixed connection with the underframe floor of the vehicle body.

3. The underframe structure of the car body end of the EMU according to claim 2, wherein the traction beam further includes a transverse partition, and two sides of the transverse partition are respectively connected to the two traction beam side plates. Connected and the transverse partition extends along the length direction of the traction beam.

4. The underframe structure of the car body end of the EMU according to claim 2 or 3, wherein the top plate of the traction beam is provided with a welding position for increasing the welding position between the top plate of the traction beam and the floor of the car body underframe的通槽.

5. The vehicle body end underframe structure of the EMU according to claim 2 or 3, wherein the coupler seat plate is an I-shaped structure, and the traction beam top plate is connected to the upper wing of the coupler seat plate The two side plates of the traction beam are connected to the webs of the coupler seat plate.

6. The vehicle body end underframe structure of the EMU according to claim 5, wherein the top plate of the traction beam and the upper wing plate of the coupler seat plate are connected by a first transition connecting plate, and the A transition connecting plate is used for fixed connection with the underframe floor of the vehicle body.

7. The vehicle body end underframe structure of the EMU according to claim 6, wherein the vehicle A side of the upper wing plate of the hook seat plate away from the traction beam is connected with a second transition connecting plate, and the second transition connecting plate is used for fixed connection with the underframe floor of the vehicle body.

8. The car body end underframe structure of the EMU according to claim 5, wherein the lower wing plate of the coupler seat plate is connected with a traction beam cover plate, and the traction beam cover plate is connected to the two The side plates of the traction beam are connected.

9. The vehicle body end underframe structure of the EMU according to claim 5, wherein the coupler box includes a coupler box bottom plate and two coupler box side panels, and the coupler box bottom plate is connected to the coupler seat plate The two coupler box side panels are connected to the webs of the coupler seat plate, and the coupler box bottom plate, the coupler seat plate, the front end plate and the two coupler box side plates can be connected to The underframe floor of the vehicle body cooperates to form a receiving cavity that communicates with the outside through only the through hole.

10. The vehicle body end underframe structure of the EMU according to claim 9, wherein the front end plate includes a main body and two T-shaped connecting pieces, the through holes are provided in the main body, and the two T-shaped connecting pieces are respectively arranged on both sides of the main body, the horizontal plates of the T-shaped connecting pieces are connected with the main body, and the vertical plates of the T-shaped connecting pieces are connected with the side plates of the coupler box.

11. The body end underframe structure of the EMU according to claim 10, wherein the front end plate further comprises a transverse mounting plate, the transverse mounting plate is connected to the main body and the two T-shaped connections At the lower end of the piece, the inner side of the transverse mounting plate is provided with a C-shaped chute for mounting the bottom plate of the end part of the vehicle body underframe.

12. The underframe structure of the car body end of the EMU according to any one of claims 2-3 and 6-11, wherein the traction beam assembly includes a plurality of the traction beams, and a plurality of the traction beams They are connected side by side and spaced apart from the rear side of the coupler seat plate.

13. The vehicle body end underframe structure of the EMU according to claim 12, characterized in that at least two traction beams on both sides of the traction beam assembly are provided on the side plates of the traction beams that are far away from each other. The hoisting interface.

14. The underframe structure of the car body end of the EMU according to any one of claims 1-3, 6-11 and 13, wherein the hoisting interface is used to set the installation face downward in cooperation with the external equipment, and The hoisting interface is provided with a chute corresponding to the mounting surface, and the chute is used for placing a slider, and the hoisting bolt extends into the chute to cooperate with the slider to hoist the external device on The hoisting connection mouth.

15. The EMU car body end underframe structure according to any one of claims 1-3, 6-11 and 13, wherein the outer surface of the front end plate and the outer surface of the end wall of the car body underframe For the same end face.

16. The EMU car body end underframe structure according to any one of claims 1-3, 6-11 and 13, wherein the front end plate is provided with electrical connector installations on both sides of the through hole Structure, the electrical connector installation structure includes a box-shaped box opened in the same direction as the through hole, and an upper wall of the box-shaped box is provided with a wiring hole and a mounting hole opened around the wiring hole.

17. The underframe structure of the car body end of the EMU according to claim 16, wherein the top wall of the box-shaped box is inclined downward from one end of the outer surface of the front end plate to form an inclination angle.

18. The underframe structure of the car body end of the EMU according to any one of claims 1-3, 6-11 and 13, wherein both ends of the inner side of the front end plate are respectively provided for contact with the car body The end side skirt is matched with a stepped boss structure for pressing the sealing rubber strip.

19. An EMU, characterized by comprising the underframe structure at the end of the EMU body according to any one of claims 1-18.