Aluminum alloy vehicle body traction, bolster and buffer structure based on bogie with built-in axle boxes

Abstract

The invention provides an aluminum alloy vehicle body traction, bolster and buffer structure based on a bogie with a built-in axle box, which comprises a sleeper beam assembly, a traction beam assembly, a buffer beam assembly and a coupler mounting seat, and the performances such as static strength test, vehicle body strength, rigidity and modality of the aluminum alloy vehicle body traction, bolster and buffer structure meet the requirements. The traction, bolster and buffer structure can be directly used for an A-type aluminum alloy platform axle box built-in bogie train, and provides unified standards of core structure parameters such as corresponding aluminum material type selection and boundary dimension characteristics for the traction, bolster and buffer of an all-aluminum structure of a new vehicle type, so that the design efficiency is improved, the design risk is reduced, and the design cost is reduced. In addition, compared with an existing A-type aluminum alloy platform vehicle traction, bolster and buffer structure, the traction, bolster and buffer structure has the advantages that the weight of the traction, bolster and buffer structure is reduced by 40%, the material cost and the labor cost are saved, and energy conservation and emission reduction are facilitated.

Description

Technical Field

[0001] This invention relates to the field of car body structure for urban rail transit vehicles, and more particularly to an aluminum alloy car body traction and buffer structure based on an axle box-integrated bogie. Background Technology

[0002] The bogies, underframes, traction buffers, and other load-bearing devices of rail vehicles are used to transmit traction power to the underframe of the car body. Therefore, such load-bearing devices have problems such as high structural strength requirements, complex stress distribution, and difficult manufacturing.

[0003] Built-in axle box bogies are a relatively advanced type of bogie in modern rail transit vehicles, optimizing the bogie layout and reducing the overall weight of the bogie. However, they are currently only used on some steel-bodied vehicles. Since the train in the "Smart Metro 2.0" project, based on the integration of green and intelligent technologies, is an A-type aluminum alloy metro platform car with an aluminum alloy underframe and uses a built-in axle box bogie, a completely new traction and buffer structure matching this design is required. Summary of the Invention

[0004] The purpose of this invention is to design a traction and buffer structure suitable for the train body (Type A aluminum alloy metro platform) of the digital metro vehicle development project based on green and intelligent integration (Intelligent Metro 2.0). While meeting the usability requirements of the axle box-integrated bogie, the strength of its own structure meets relevant standards. Moreover, compared with the current traction and buffer structure of the Type A aluminum alloy platform car body, it can effectively reduce weight. The new traction and buffer structure provided by this invention provides a reference for the standardization of traction and buffer structures for rail vehicles that adopt axle box-integrated bogies in the future.

[0005] To achieve the above objectives, the present invention provides an aluminum alloy car body traction-bolster-shock structure based on an axle box-integrated bogie, comprising a bolster beam assembly, a traction beam assembly, a buffer beam assembly, and a coupler mounting seat. The two ends of the bolster beam assembly are welded and fixedly connected to the underframe side beams, the end of the buffer beam is welded and fixedly connected to the underframe end beams, the upper surface of the traction-bolster-shock structure is welded and fixedly connected to the underframe aluminum floor, and the coupler mounting seat is fixed between the traction beam and the buffer beam.

[0006] Furthermore, the bolster beam assembly has a core plate mounting plane and mounting holes in the middle, the core plate is fixed to the bolster beam by bolts, and the bogie is connected to the traction-bolster-slowing structure through the core plate.

[0007] Furthermore, two recessed planes are machined on the bolster beam and located on both sides of the core plate seat. The wear plate is placed in the recessed planes machined on the bolster beam assembly and connected to the bolster beam assembly by countersunk bolts.

[0008] Furthermore, a square hole is machined on both sides of the lower plane of the bolster beam assembly, and a through hole and two small round holes are machined on the side of the bolster beam assembly with pre-embedded steel sleeves for inserting the lifting rod and installing the cover plate. Thick aluminum plates are welded together to form a sling seat, which is inserted into the square hole and welded to the bolster beam assembly. When the vehicle is lifted, it needs to be lifted together with the bogie. Therefore, steel cable hooks are set on the bogie. The bolster beam assembly needs to be designed with a sling lock seat structure for installing the steel cable hooks on the bogie. When installing the steel cable hooks, the steel cable hooks are first placed in the sling lock seat, then the lifting rod is inserted into the sling lock seat from the side of the bolster beam and passes through the steel cable hooks. Finally, the cover plate is installed.

[0009] Furthermore, the wear plate is made of stainless steel.

[0010] Furthermore, the traction beam assembly includes an upper traction beam cover plate, a lower traction beam cover plate, and a vertical plate. One end of the traction beam assembly is connected to the middle of the sleeper beam assembly, and the other end is connected to the coupler mounting seat and the buffer beam.

[0011] Furthermore, the coupler mounting base includes a coupler base profile and a reinforcing plate.

[0012] Furthermore, the buffer beam assembly includes an upper cover plate, a lower cover plate, and a vertical plate, and the buffer beam assembly is welded to the coupler mounting base and the buffer beam, respectively.

[0013] The lightweight design of this invention, which completes the aluminum alloy car body bolster and buffer structure based on the axle box built-in bogie, has fully passed the comprehensive testing of the EN12663 standard "Railway Applications - Structural Requirements for Railway Vehicle Bodies". Its static strength test, car body strength, stiffness, modal performance and other properties all meet the requirements.

[0014] The traction bolster and buffer structure of this invention can be directly used in A-type aluminum alloy platform axle box built-in bogie trains, and provides a unified standard for the core structural parameters such as aluminum material selection and external dimensions of the all-aluminum structure traction bolster and buffer of this new model, thereby improving design efficiency and reducing design risks. It provides a reference for the platformization, standardization and modularization of the body structure of this type of bogie aluminum alloy vehicle. In addition, the traction bolster and buffer structure of this invention reduces weight by 40% compared with the previous A-type aluminum alloy platform vehicle traction bolster and buffer structure, saving material costs and labor costs, and contributing to energy conservation and emission reduction. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the bolster beam structure of the present invention;

[0016] Figure 2 A schematic diagram of the installation structure of the side sling seat cover plate for the sleeper beam;

[0017] Figure 3 This is a schematic diagram of the traction beam structure of the present invention;

[0018] Figure 4 This is a schematic diagram of the coupler mounting base structure of the present invention;

[0019] Figure 5 This is a schematic diagram of the buffer beam structure of the present invention;

[0020] Figure 6 This is a schematic diagram of the wear plate structure of the present invention;

[0021] Figure 7 This is a schematic diagram of the installation of the traction cushion structure of the present invention;

[0022] Figure 8 This is a schematic diagram of the installation of the traction cushion structure of the present invention with the vehicle body. Detailed Implementation

[0023] Reference Figures 1 to 8 The entire device includes: 1. Pillar beam assembly; 2. Traction beam assembly; 3. Coupler mounting base; 4. Buffer beam assembly; 5. Wear plate. Figure 1 The middle bolster beam component 1 includes a first bolster beam profile 1-1, a second bolster beam profile 1-2, a lifting lock seat 1-3, a wear plate mounting area 1-4, a core plate seat mounting area 1-5, and a sling seat cover plate mounting structure 1-6. Figure 2 The middle traction beam component 2 includes an upper traction beam cover plate 2-1, a lower traction beam cover plate 2-2, and a traction beam upright plate 2-3. Figure 3 The CRRC coupler mounting base 3 includes a coupler base profile 3-1 and a reinforcing plate 3-2. Figure 4 The buffer beam includes an upper cover plate 4-1, a lower cover plate 4-2, and a vertical plate 4-3. Figure 5 For wear plate 5, when specifically applying the traction buffer device of the all-aluminum rail vehicle of the present invention, such as... Figure 7 As shown, a is the bolster-shelter structure, b is the underframe side beam, c is the floor, and d is the underframe end beam. The aluminum alloy car body underframe is fixed in reverse position on the mounting station. The two ends of the bolster beam component 1 of the bolster-shelter structure a are welded and fixed to the underframe side beam b, and the end of the buffer beam component 4 is welded and fixed to the car body underframe end beam d. The upper surface of the bolster-shelter structure a is welded and fixed to the aluminum floor c of the underframe. This completes the assembly of the aluminum alloy car body bolster-shelter structure a based on the axle box built-in bogie of the present invention with the car body underframe.

[0024] The aluminum alloy body traction-bolster-shock structure based on the axle box-integrated bogie features a bolster beam assembly 1 and a coupler mounting base 3, both constructed using profile welding followed by integral machining. Traction beam assembly 2 and buffer beam assembly 4 are aluminum plate welded structures. Wear plate 5 is made of stainless steel. The bogie is connected to the traction-bolster-shock structure a via a core plate seat. To meet the installation requirements of the axle box-integrated bogie, bolster beam assembly 1 must be the bogie core plate seat, with mounting areas 1-5 including mounting planes and mounting holes. The core plate seat is fixed to bolster beam assembly 1 with bolts. Furthermore, the axle box-integrated bogie has a unique side bearing structure. The bearing structure is located above the bogie, symmetrically arranged on the first and second sides. The entire car rests on the bogie side bearing structure. The bolster beam assembly 1 is in free contact with the side bearing structure. The bogie has a certain rotation angle relative to the car body with the core plate seat as the center. Since the aluminum alloy material is relatively soft and not suitable for direct contact with the side bearing structure, considering durability and replaceability, and combining the contact surface between the side bearing structure and the bolster beam assembly 1 and the rotation angle of the bogie, two recessed planes and mounting holes are machined on the bolster beam assembly 1 and steel wire thread sleeves are pre-embedded. The stainless steel wear plate 5 is placed on the recessed plane machined on the bolster beam assembly 1 and connected to the bolster beam assembly 1 by countersunk bolts.

[0025] When the vehicle is lifted, the bogie must be lifted together. Therefore, a cable hook structure is installed on the bogie. The sleeper beam assembly 1 needs to be designed with a cable hook mounting structure. To meet the installation height requirements of the cable hook, the cable hook mounting 1-3 needs to be sunk into the profile of the sleeper beam assembly 1. First, a square hole is machined on both sides of the lower plane of the sleeper beam assembly 1. A cable hook mounting cover plate installation structure 1-6 is machined on the side of the sleeper beam assembly 1. The cable hook mounting cover plate installation structure 1-6 is provided with a through hole and two small round holes and a steel sleeve is pre-embedded for the insertion of the lifting rod and the installation of the cover plate. Thick aluminum plates are welded together to form the cable hook mounting 1-3, which is inserted into the square hole and welded to the sleeper beam assembly 1. When installing the cable hook, the cable hook is first placed in the cable hook mounting 1-3, then the lifting rod is inserted into the cable hook mounting from the side of the sleeper beam assembly 1 and passes through the cable hook. Finally, the cover plate is installed.

Claims

1. A bogie-based aluminum alloy car body bolster and buffer structure with built-in axle box, characterized in that, It includes a bolster beam assembly, a traction beam assembly, a buffer beam assembly, and a coupler mounting base. The two ends of the bolster beam assembly are welded and fixed to the side beams of the underframe. The end of the buffer beam is welded and fixed to the end beam of the underframe. The upper surface of the traction-bolster-buffer structure is welded and fixed to the aluminum floor of the underframe. The coupler mounting base is fixed between the traction beam and the buffer beam.

2. The aluminum alloy car body bolster and buffer structure based on an axle box-integrated bogie according to claim 1, characterized in that, The bolster beam assembly has a core plate mounting plane and mounting holes in the middle. The core plate is fixed to the bolster beam assembly by bolts, and the bogie is connected to the traction bolster and buffer structure through the core plate.

3. The aluminum alloy car body bolster and buffer structure based on an axle box-integrated bogie according to claim 1, characterized in that, The bolster assembly has two recessed planes machined on its surface and located on both sides of the core plate seat. The wear plate is placed in the recessed planes machined on the bolster assembly and connected to the bolster assembly by countersunk bolts.

4. The aluminum alloy car body bolster and buffer structure based on an axle box-integrated bogie according to claim 1, characterized in that, The lower plane of the bolster beam assembly has a square hole machined on both sides. The side of the bolster beam assembly has a through hole and two small round holes machined and pre-embedded with steel sleeves for inserting the lifting rod and installing the cover plate. Thick aluminum plates are welded together to form a sling seat, which is inserted into the square hole and welded to the bolster beam assembly. When the vehicle is lifted, it needs to be lifted together with the bogie. Therefore, steel cable hooks are set on the bogie. The bolster beam assembly needs to be designed with a sling lock seat structure for installing the steel cable hooks on the bogie. When installing the steel cable hooks, first place the steel cable hooks in the sling lock seat, then insert the lifting rod from the side of the bolster beam into the sling lock seat and pass through the steel cable hooks, and finally install the cover plate.

5. The aluminum alloy car body bolster and buffer structure based on an axle box-integrated bogie according to claim 3, characterized in that... The wear plate is made of stainless steel.

6. The aluminum alloy car body bolster and buffer structure based on an axle box-integrated bogie according to claim 1, characterized in that, The traction beam assembly includes an upper cover plate, a lower cover plate, and a vertical plate. One end of the traction beam assembly is connected to the middle of the sleeper beam assembly, and the other end is connected to the coupler mounting seat and the buffer beam.

7. The aluminum alloy car body bolster and buffer structure based on an axle box-integrated bogie according to claim 1, characterized in that, The coupler mounting base includes a coupler base profile and a reinforcing plate.

8. The aluminum alloy car body bolster and buffer structure based on an axle box-integrated bogie according to claim 1, characterized in that, The buffer beam assembly includes an upper cover plate, a lower cover plate, and a vertical plate, which are welded to the coupler mounting base and the buffer beam, respectively.

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