CA-3168403-C - RAIL VEHICLE, AND VEHICLE BODY AND END UNDERFRAME THEREOF

CA3168403CCA 3168403 CCA3168403 CCA 3168403CCA-3168403-C

Abstract

The present invention provides a rail vehicle, and a vehicle body and an end underframe thereof. The end underframe comprises a coupler end cross beam assembly (11), side beams (12, 13), a sleeper beam (14) and a force transmission beam assembly (15); the coupler end cross beam assembly (11) comprises a coupler end cross beam (111), a coupler mounting base (112) and a traction beam (113); the coupler mounting base (112) has a hollow structure, one end of the coupler mounting base (112) is fixedly connected to the side surface of the coupler end cross beam (111) facing away from the traction beam (113), and the other end of the coupler mounting base is provided with a mounting surface (1121) for mounting a coupler; the coupler end cross beam (111) is provided with a retraction through hole for enabling the coupler to pass through when the coupler is retracted in a direction from the coupler mounting base (112) towards the traction beam (113); and the traction beam (113) is provided with a retraction space (1131) for accommodating the retracted coupler. The end underframe has an integral structure to transmit force so as to improve the resistance to compression and the capacity of heavy load bearing, and achieves the function of retracting a coupler by improving the structures of the coupler end cross beam, the traction beam and the coupler mounting base.

Inventors

JIANYING HOU
Leheng CHEN
Baolei Xu
Shuoshao ZHANG
ZHENJIE HAO
Jinhua Zhang
Haisheng Wang
Yuxi YANG
YINA FU
JIANPING ZONG

Assignees

CRRC TANGSHAN CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20191219
Priority Date: 20191213

Claims (13)

CLAIMS: 1. An end underframe, comprising a coupler end cross beam assembly, a left side beam, a right side beam, a sleeper beam, and a force transmission beam assembly; wherein the left side beam and the right side beam are arranged in parallel; along a lengthwise direction of the left side beam, the coupler end cross beam assembly, the sleeper beam and the force transmission beam assembly are fixedly connected in sequence and are all fixedly connected with the left side beam and the right side beam; the coupler end cross beam assembly comprises a coupler end cross beam, a coupler mounting base and a traction beam; the coupler end cross beam is fixedly connected to the left side beam and the right side beam; the traction beam is fixedly connected between the coupler end cross beam and the sleeper beam; the coupler mounting base is of a hollow structure, one end of the coupler mounting base is fixedly connected to a side surface of the coupler end cross beam facing away from the traction beam, and the other end of the coupler mounting base is provided with a mounting surf ace for mounting a coupler; wherein the coupler mounting base has a rectangular tubular structure and is provided with a plurality of crushing through holes penetrating the side wall thereof; the coupler end cross beam is provided with a retraction through hole for enabling the coupler to pass through when the coupler is retracted in a direction from the coupler mounting base towards the traction beam; and the traction beam is provided with a retraction space for accommodating the retracted coupler.
2. The end underframe according to claim 1, wherein the crushing through holes are evenly distributed along a circumference of the coupler mounting base.
3. The end underframe according to claim 2, wherein the crushing through holes 16 Date Rer;ue/Date Received 2024-02-26 are disposed on an edge of the coupler mounting base.
4. The end underframe according to claim 1, wherein each of the left side beam and the right side beam comprises a CT-channel steel side sub-beam with an opening facing the traction beam, a vertical plate configured for plugging the opening, and a CT-shaped stainless steel side sub-beam, and an outer-side surface of the CT-channel steel side sub-beam facing away from the traction beam is covered with the CT-shaped stainless steel side sub-beam to form a double-layer structure.
5. The end underframe according to claim 4, wherein along a lengthwise direction of the CT-channel steel side sub-beam, a plurality of reinforcing plates are welded in a side beam cavity enclosed by the CT -channel steel side sub-beam and the vertical plate.
6. The end underframe according to claim 1, wherein a coupler mounting panel for mounting the coupler mounting base protrudes from a bottom surface of the coupler end cross beam; the retraction through hole penetrates through the coupler mounting panel.
7. The end underframe according to any one of claims 1 to 6, wherein a frame structure is fixedly connected to each of sides of the traction beam towards the left side beam and the right side beam; the end underframe further comprises floor cross beams and floor longitudinal beams which intersect perpendicularly and are arranged between the frame structure and the left side beam, between the frame structure and the right side beam, between the force transmission beam assembly and the left side beam and between the force transmission beam assembly and the right side beam; a stainless steel floor is welded on a top surface of the end underframe, and edges of the stainless steel floor are welded to the left side beam, the right side beam, the traction beam, the sleeper beam, the coupler end cross beam and the force transmission beam assembly through a full weld process.
8. The end underframe according to claim 7, wherein the floor cross beams are provided with a lightening hole; the floor longitudinal beams are of an M-shaped 17 Date Rer;ue/Date Received 2024-02-26 structure, and the floor longitudinal beams and the stainless steel floor are welded through a spot welding process.
9. The end underframe according to claim 7, wherein a plurality of reinforcing rib plates are welded on a side surface of the stainless steel floor facing away from the traction beam.
10. The end underframe according to any one of claims 1 to 6, wherein the traction beam comprises a first vertical plate, a second vertical plate, a top plate, a dummy plate, and a bottom plate; the first vertical plate and the second vertical plate are arranged in parallel with the left side beam; the bottom plate and the top plate are arranged along a horizontal direction and are welded between the first vertical plate and the second vertical plate; and the dummy plate is welded to the first vertical plate and the second vertical plate and is located between the bottom plate and the top plate in a vertical direction.
11. The end underframe according to claim 10, wherein the first vertical plate and the second vertical plate are both right-angled trapezoidal plates, and the heights of the first vertical plate and the second vertical plate are gradually reduced along a direction from the coupler end cross beam towards the sleeper beam.
12. A vehicle body, comprising the end underframe according to any one of claims 1 to 11 and the coupler mounted on the end underframe.
13. A rail vehicle, comprising the vehicle body according to claim 12. 18 Date Rer;ue/Date Received 2024-02-26

Description

RAIL VEHICLE, AND VEHICLE BODY AND END UNDERFRAME THEREOF TECHNICAL FIELD The present application relates to the field of rail vehicle technologies, and in particular, to a rail vehicle, and a vehicle body and an end underframe thereof. BACKGROUND A vehicle body of a rail vehicle includes an underframe, the underframe includes an end underframe and a middle underframe, and the end underframe includes a traction beam, a sleeper beam, a buffer beam, and the like. The end underframe generally has a middle force transmission structure in which force transmission is conducted by the traction beam, sleeper beam and buff er beam, with ineffective force transmission at a side beam. The body strength of the related rail vehicle needs to meet the subway stainless steel vehicle body standard BS EN12663-2 with a resistance to compression load larger than 800kN and the domestic carbon steel vehicle body executive standard TB/T1335 with the resistance to compression load larger than 1180kN. The traction beam of the related end underframe generally has a closed box structure so as to improve a bearing capacity and resistance to compression of the end underframe and the vehicle body. However, after a coupler is mounted for the traction beam with such a structure, the coupler is inconvenient to retract due to block of the closed box structure when the rail vehicles collide. Therefore, when the end underframe is in a situation with the compression far higher than the requirement of the above-mentioned standard (such as 3560kN compression), the requirement of resistance to compression and heavy load bearing cannot be met, and meanwhile, the related traction beam cannot achieve the function of retracting the coupler in the collision process. 1 Date Rer;ue/Date Received 2024-02-26 SUMMARY An embodiment of the present application provides a rail vehicle, and a vehicle body and an end underframe thereof, wherein the end underframe transmits force through an integral structure so as to improve the resistance to compression and the capacity of heavy load bearing, and achieves the function of retracting a coupler by improving the structures of a coupler end cross beam, a traction beam and a coupler mounting base. According to a first aspect of embodiments of the present application, there is provided an end underframe including a coupler end cross beam assembly, a left side beam, a right side beam, a sleeper beam, and a force transmission beam assembly; wherein the left side beam and the right side beam are arranged in parallel; along a lengthwise direction of the left side beam, the coupler end cross beam assembly, the sleeper beam and the force transmission beam assembly are :fixedly connected in sequence and are all :fixedly connected with the left side beam and the right side beam; the coupler end cross beam assembly includes a coupler end cross beam, a coupler mounting base and a traction beam; the coupler end cross beam is :fixedly connected to the left side beam and the right side beam; the traction beam is :fixedly connected between the coupler end cross beam and the sleeper beam; the coupler mounting base is of a hollow structure, one end of the coupler mounting base is :fixedly connected to a side surface of the coupler end cross beam facing away from the traction beam, and the other end of the coupler mounting base is provided with a mounting surface for mounting a coupler; the coupler end cross beam is provided with a retraction through hole for enabling the coupler to pass through when the coupler is retracted in a direction from the coupler mounting base towards the traction beam; and 2 Date Rer;ue/Date Received 2024-02-26 the traction beam is provided with a retraction space for accommodating the retracted coupler. In some alternative implementations, the coupler mounting base has a rectangular tubular structure provided with a plurality of crushing through holes penetrating the side wall thereof. In some alternative implementations, the crushing through holes are evenly distributed along a circumference of the coupler mounting base. In some alternative implementations, the crushing through holes are disposed on an edge of the coupler mounting base. In some alternative implementations, each of the left side beam and the right side beam is of a double-layer structure and includes a U-channel steel side sub-beam with an opening facing the traction beam, a vertical plate configured for plugging the opening, and a U-shaped stainless steel side sub-beam, and an outer-side surface of the U-channel steel side sub-beam facing away from the traction beam is covered with the U-shaped stainless steel side sub-beam. In some alternative implementations, along a lengthwise direction of the U-channel steel side sub-beam, a plurality of reinforcing plates are welded in a side beam cavity enclosed by the U-channel steel side sub-beam and the vertical plate. In some alternative implementations, a coupler mounting panel for mounting the