Subway traction buffer beam welding tooling

Abstract

The utility model relates to welding frock technical field discloses a subway traction buffer beam welding frock, including support platform, turnover positioner, turnover positioner support frame, longitudinal beam pressure tight device, longitudinal beam push tight device and center positioning device, support platform is used for placing subway traction buffer beam, and the beam placement place is the openwork structure, the turnover positioner is two, sets up respectively in the left and right ends of support platform, is used for turning over support platform, the turnover positioner sets up on turnover positioner support frame, longitudinal beam pressure tight device is multiple, sets up on the upper surface of support platform along longitudinal beam placement direction, is used for in vertical direction pressure tight longitudinal beam, longitudinal beam push tight device is multiple, sets up on the upper surface of support platform along longitudinal beam placement direction, is used for in horizontal direction push tight longitudinal beam, center positioning device sets up on the upper surface of support platform, is used for positioning and fixed beam. The utility model does not need manual frequent turnover work piece, reduces the labor intensity and safety risk, improves work efficiency and security.

Description

Technical Field

[0001] This utility model relates to the field of welding tooling technology, specifically to a welding tooling for a subway traction buffer beam. Background Technology

[0002] In the field of modern urban rail transit, the subway traction buffer beam, as a key component of the train, is located at both ends of the car body underframe. Its core function is to install traction buffer devices, realize the effective transmission of traction and braking forces, and withstand a certain degree of impact. However, the welding fixtures used in the traditional welding process of subway traction buffer beams have many significant drawbacks, which seriously restrict production efficiency and product quality.

[0003] Previously, when performing assembly welding on a welding platform, operators typically used measuring tapes or assembly templates. However, this method often resulted in inconsistent dimensional accuracy, leading to deviations and affecting weld quality. More importantly, the welding process only allowed for the exposed weld beads on the top surface; welding the back and sides required using a crane to lift and rotate the workpiece. Firstly, this process was time-consuming and required frequent crane intervention, significantly increasing manpower and material costs and resulting in low production efficiency. Secondly, due to the large size and heavy weight of the subway traction buffer beam, lifting and rotating it posed significant safety hazards. The workpiece was prone to falling during welding, which could damage equipment and endanger the lives of operators.

[0004] In summary, the problems with traditional welding fixtures for subway traction buffer beams can no longer meet the demands of modern, efficient, safe, and precise industrial production, severely hindering the overall development of the subway vehicle manufacturing industry. Therefore, it is urgently necessary to research and design a new type of welding fixture for subway traction buffer beams to effectively overcome the shortcomings of existing technologies, improve welding efficiency, ensure welding quality, and enhance operational safety. This is of paramount importance for promoting the continuous progress of the urban rail transit industry. Utility Model Content

[0005] To address the problems of difficult flipping, significant safety hazards, and low efficiency in traditional subway traction buffer beam welding fixtures, this utility model provides a subway traction buffer beam welding fixture.

[0006] The technical solution adopted by this utility model to achieve the above-mentioned objective is: a welding fixture for a subway traction buffer beam, used to fix the subway traction buffer beam, which includes two longitudinal beams and one transverse beam, wherein the two longitudinal beams are respectively connected to the left and right ends of the transverse beam, including...

[0007] A support platform is provided for placing the subway traction buffer beam, and the placement area of ​​the crossbeam is a hollow structure.

[0008] The flipping and positioning machine consists of two machines, which are respectively located at the left and right ends of the support platform. The flipping and positioning machine is used to flip the support platform.

[0009] A tilting and positioning machine support frame, wherein the tilting and positioning machine is mounted on the tilting and positioning machine support frame;

[0010] A longitudinal beam clamping device, wherein there are multiple longitudinal beam clamping devices, all of which are disposed on the upper surface of the support platform and arranged along the placement direction of the longitudinal beam; the longitudinal beam clamping device is used to clamp the longitudinal beam in the vertical direction.

[0011] A longitudinal beam pushing device, wherein there are multiple longitudinal beam pushing devices, all of which are disposed on the upper surface of the support platform and arranged along the placement direction of the longitudinal beam, and the longitudinal beam pushing device is used to push the longitudinal beam in the horizontal direction;

[0012] A central positioning device is disposed on the upper surface of the support platform, and the central positioning device is used to position and fix the crossbeam.

[0013] According to some embodiments of the present invention, a welding fixture for a subway traction buffer beam includes a tilting and positioning machine support, a tilting and positioning machine motor, an output shaft, a bearing housing, a bearing, an end cover, a pinion, a large gear, a gear support, and a turntable. The tilting and positioning machine support is connected to the tilting and positioning machine support frame. The tilting and positioning machine motor is mounted on the tilting and positioning machine support. The output shaft of the tilting and positioning machine motor passes through the bearing housing after exiting the motor. A bearing is provided between the output shaft and the bearing housing. The end cover is provided at both ends of the bearing housing. The pinion is provided at one end of the output shaft that exits the bearing housing. The pinion meshes with the large gear. The large gear is radially internally connected to the gear support through a gear bearing. The gear support is connected to the tilting and positioning machine support. The large gear is connected to the turntable.

[0014] According to some embodiments of the present invention, a welding fixture for a subway traction buffer beam is provided. The turntable of the flipping and positioning machine is connected to the support platform via a first flipping and positioning machine connecting plate and a second flipping and positioning machine connecting plate. The first flipping and positioning machine connecting plate is an L-shaped plate and includes a first vertical connecting plate and a first horizontal connecting plate connected to each other. The first vertical connecting plate is connected to the turntable, and the first horizontal connecting plate is connected to the upper surface of the support platform. A plurality of first connecting plate reinforcing ribs are provided between the first vertical connecting plate and the first horizontal connecting plate. The second flipping and positioning machine connecting plate is an L-shaped plate and includes a second vertical connecting plate and a second horizontal connecting plate connected to each other. The second vertical connecting plate is connected to the turntable, and the second horizontal connecting plate is connected to the lower surface of the support platform. A plurality of second connecting plate reinforcing ribs are provided between the second vertical connecting plate and the second horizontal connecting plate.

[0015] According to some embodiments of the present invention, a welding fixture for a subway traction buffer beam is provided, wherein the tilting and positioning machine support frame is provided with a slide rail, and the tilting and positioning machine support is disposed on the slide rail.

[0016] According to some embodiments of the present invention, a welding fixture for a subway traction buffer beam includes a longitudinal beam clamping device comprising a screw clamping mechanism and a support conformal block. The screw clamping mechanism includes a clamping mechanism support, a tilting arm, a hinge shaft, a locking pin, a clamping nut, a clamping screw, and a clamping rotating lever. The clamping mechanism support is connected to the upper surface of the support platform. Hinge holes are provided at corresponding positions on the clamping mechanism support and the tilting arm. The hinge shaft passes through the hinge holes of the clamping mechanism support and the tilting arm, connecting the clamping mechanism support and the tilting arm. The arm is connected, and the corresponding position of the clamping mechanism support and the flipping pressure arm is provided with a pin hole. The locking pin passes through the pin hole of the clamping mechanism support and the flipping pressure arm. The free end of the flipping pressure arm is provided with the clamping nut. The clamping screw is threadedly connected to the clamping nut. One end of the clamping screw abuts against the upper surface of the longitudinal beam, and the other end of the clamping screw is provided with the clamping rotating lever. The support conforming block is set on the lower surface of the longitudinal beam, and the support conforming block is connected to the upper surface of the support platform. The support conforming block is used to support the longitudinal beam.

[0017] According to some embodiments of the present invention, a welding fixture for a subway traction buffer beam includes a longitudinal beam pushing and tightening device comprising a lateral screw pushing and tightening mechanism, an end screw pushing and tightening mechanism, a lateral limiting block, and an end limiting block. The lateral screw pushing and tightening mechanism is disposed on the side of the longitudinal beam, and the lateral limiting block and the lateral screw pushing and tightening mechanism are disposed correspondingly on both sides of the longitudinal beam. The end screw pushing and tightening mechanism is disposed on the end face of the longitudinal beam, and the end limiting block and the end screw pushing and tightening mechanism are disposed correspondingly at both ends of the longitudinal beam.

[0018] According to some embodiments of the present invention, a welding fixture for a subway traction buffer beam includes a lateral screw tensioning mechanism, a lateral tensioning nut, a lateral tensioning screw, and a lateral tensioning rotating lever. The lateral tensioning mechanism support is connected to the upper surface of the support platform. The lateral tensioning nut is disposed at the upper end of the lateral tensioning mechanism support. The lateral tensioning screw is threadedly connected to the lateral tensioning nut. One end of the lateral tensioning screw abuts against the outer side of the longitudinal beam, and the other end of the lateral tensioning screw is provided with the lateral tensioning rotating lever.

[0019] According to some embodiments of the present invention, a welding fixture for a subway traction buffer beam includes an end-end screw tensioning mechanism comprising an end-end tensioning mechanism support, an end-end tensioning nut, an end-end tensioning screw, and an end-end tensioning rotating lever. The end-end tensioning mechanism support is connected to the upper surface of the support platform. The end-end tensioning nut is disposed at the upper end of the end-end tensioning mechanism support. The end-end tensioning screw is threadedly connected to the end-end tensioning nut. One end of the end-end tensioning screw abuts against the end face of the longitudinal beam, and the other end of the end-end tensioning screw is provided with the end-end tensioning rotating lever.

[0020] According to some embodiments of the present invention, a welding fixture for a subway traction buffer beam includes a center positioning device comprising a screw locking mechanism, a sliding guide seat, a connecting seat, a positioning plate, a positioning pin, a stop block, and a limiting block. The screw locking mechanism is disposed on the upper surface of the support platform. The sliding guide seat is disposed between the screw locking mechanism and the crossbeam, and the upper surface of the sliding guide seat is provided with a slide rail. The connecting seat is disposed on the slide rail. The connecting seat includes a horizontal plate, a vertical plate, a reinforcing rib, and a connecting plate. The horizontal plate and the vertical plate are connected to each other to form an L-shape. A plate is set on the slide rail. The vertical plate is connected to the positioning plate. The reinforcing rib is set between the horizontal plate and the vertical plate. The connecting plate is set on the upper surface of the horizontal plate, and both ends of the connecting plate are connected to the reinforcing rib. The connecting plate is connected to the screw locking mechanism. The positioning plate and the four corners of the crossbeam are provided with positioning holes. The positioning pin passes through the positioning holes of the positioning plate and the crossbeam to fix the crossbeam on the positioning plate. The stop block is set at the bottom of the side of the horizontal plate. The limiting block is set on the side of the sliding guide seat. The stop block and the limiting block cooperate to position the crossbeam.

[0021] According to some embodiments of the present invention, a welding fixture for a subway traction buffer beam includes a lead screw locking mechanism comprising a locking mechanism support, a locking lead screw, and a locking rotating lever. The locking mechanism support is disposed on the upper surface of the support platform. The locking mechanism support has a through hole with internal threads. The locking lead screw passes through the through hole and is threadedly connected to the locking mechanism support. One end of the locking lead screw is connected to the connecting plate, and the other end of the locking lead screw is provided with the locking rotating lever.

[0022] This utility model provides a welding fixture for a subway traction buffer beam, which has the following significant advantages:

[0023] 1. It can accurately position the longitudinal and transverse beams of the subway traction buffer beam, provide stable support, ensure accurate fit of each part, lay the foundation for precise welding, and improve product precision and quality;

[0024] 2. The locking force can be adjusted according to the specifications of the subway traction buffer beam to fix the workpiece from multiple directions, prevent welding deformation, improve dimensional accuracy, and is easy to operate, thus improving work efficiency.

[0025] 3. The welding operation space is reasonable, and space is left around the weld bead to allow the welding torch and welding tools to be operated smoothly, avoid obstacles, improve welding quality and efficiency, and reduce labor intensity;

[0026] 4. It facilitates the adjustment of the position of the subway traction buffer beam, enables multi-angle welding, improves welding flexibility and adaptability, and saves manual turning time, reducing labor intensity and risk;

[0027] 5. Precise positioning and secure clamping of tooling effectively ensure product dimensional accuracy, reduce errors, improve product consistency and reliability, and reduce scrap rate;

[0028] 6. The limiting dimensions of the limit block are flexibly adjustable and can be adjusted against deformation according to the test results to prevent welding deformation and improve assembly welding efficiency and quality;

[0029] 7. The entire welding process eliminates the need for frequent manual turnover of the workpiece, reducing labor intensity and safety risks while improving work efficiency and safety.

[0030] In summary, this welding fixture, with its scientific design and practical performance, provides comprehensive support for the welding process of subway traction buffer beams, effectively improving welding efficiency and quality, reducing labor intensity and safety risks. It represents a significant innovative achievement in the field of subway vehicle manufacturing, with broad application prospects and promotional value. It also avoids manual flipping, saving time and labor, and is safe and reliable. Attached Figure Description

[0031] Figure 1This is a three-dimensional structural diagram of a welding fixture for a subway traction buffer beam according to this utility model;

[0032] Figure 2 This is a three-dimensional structural diagram of the subway traction buffer beam fixed on the welding fixture according to an embodiment of this utility model;

[0033] Figure 3 This is a cross-sectional view of the flipping and positioning machine according to an embodiment of the present invention;

[0034] Figure 4 This is a three-dimensional structural diagram of the lead screw clamping mechanism according to an embodiment of this utility model;

[0035] Figure 5 This is a three-dimensional structural diagram of the lateral lead screw pushing mechanism according to an embodiment of the present utility model;

[0036] Figure 6 This is a three-dimensional structural diagram of the end screw tensioning mechanism according to an embodiment of the present utility model;

[0037] Figure 7 This is a three-dimensional structural diagram of the central positioning device in this utility model embodiment.

[0038] In the diagram: 1. Support platform; 2. Tilting and rotating positioner; 2-1. Tilting and rotating positioner support; 2-2. Tilting and rotating positioner motor; 2-3. Output shaft; 2-4. Bearing housing; 2-5. Bearing; 2-6. End cover; 2-7. Pinion; 2-8. Gear; 2-9. Gear support; 2-10. Turntable; 3. Tilting and rotating positioner support frame; 4. First tilting and rotating positioner connecting plate; 4-1. First vertical connecting plate; 4- 2. First horizontal connecting plate; 4-3. First connecting plate reinforcing rib; 5. Second flipping and positioning machine connecting plate; 5-1. Second vertical connecting plate; 5-2. Second horizontal connecting plate; 5-3. Second connecting plate reinforcing rib; 6. Screw clamping mechanism; 6-1. Clamping mechanism support; 6-2. Flipping pressure arm; 6-3. Hinge shaft; 6-4. Locking pin; 6-5. Clamping nut; 6-6. Clamping screw; 6-7. Clamping rotation. 7. Lever, support conformal block, 8. Lateral screw tensioning mechanism, 8-1. Lateral tensioning mechanism support, 8-2. Lateral tensioning nut, 8-3. Lateral tensioning screw, 8-4. Lateral tensioning rotating lever, 9. End screw tensioning mechanism, 9-1. End tensioning mechanism support, 9-2. End tensioning nut, 9-3. End tensioning screw, 9-4. End tensioning rotating lever, 10. Lateral limit block, 11. End 12. Limiting block; 12. Screw locking mechanism; 12-1. Locking mechanism support; 12-2. Locking screw; 12-3. Locking rotating lever; 13. Sliding guide seat; 14. Connecting seat; 14-1. Horizontal plate; 14-2. Vertical plate; 14-3. Reinforcing rib; 14-4. Connecting plate; 15. Positioning plate; 16. Positioning pin; 17. Stop block; 18. Limiting block; 19. Longitudinal beam; 20. Crossbeam. Detailed Implementation

[0039] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0041] This embodiment provides a welding fixture for a subway traction buffer beam, such as... Figure 1 and Figure 2 As shown, a fixture is used to fix a subway traction buffer beam. The subway traction buffer beam includes two longitudinal beams 19 and one transverse beam 20. The two longitudinal beams 19 are connected to the left and right ends of the transverse beam 20, respectively. This fixture is designed to efficiently and accurately fix the subway traction buffer beam, ensuring the efficiency and safety of the welding operation. The fixture is ingeniously designed, with each structure working together to solve many problems in traditional welding processes. This embodiment of a subway traction buffer beam welding fixture is shown below. Figure 1 and Figure 2As shown, the system includes a support platform 1, a tilting and positioning machine 2, a tilting and positioning machine support frame 3, a longitudinal beam clamping device, a longitudinal beam pushing device, and a center positioning device. The support platform 1 is used to place the subway traction buffer beam, and the crossbeam placement area has a hollow structure, which not only reduces the overall weight but also facilitates welding of the crossbeam position after the support platform 1 is tilted. There are two tilting and positioning machines 2, which are respectively set at the left and right ends of the support platform 1. The tilting and positioning machines 2 are used to tilt the support platform 1. This tilting function greatly saves time, reduces reliance on cranes, and thus reduces labor and material costs. More importantly, it avoids the risk of workpiece falling that may occur during traditional hoisting and tilting processes, significantly improving the safety of welding operations. In addition, the multi-angle adjustment capability of the flipping and positioning machine allows welders to easily access all parts of the workpiece, achieving all-round welding and effectively improving welding quality. The flipping and positioning machine 2 is mounted on the flipping and positioning machine support frame 3. There are multiple longitudinal beam clamping devices, all of which are mounted on the upper surface of the support platform 1 and arranged along the placement direction of the longitudinal beam 19. The longitudinal beam clamping devices are used to clamp the longitudinal beam 19 in the vertical direction. There are also multiple longitudinal beam pushing devices, all of which are mounted on the upper surface of the support platform 1 and arranged along the placement direction of the longitudinal beam 19. The longitudinal beam pushing devices are used to push the longitudinal beam 19 in the horizontal direction. The center positioning device is mounted on the upper surface of the support platform 1 and is used to position and fix the crossbeam 20.

[0042] It should be noted that, as a preferred embodiment, such as Figure 3As shown, the flipping positioner 2 includes a flipping positioner support 2-1, a flipping positioner motor 2-2, an output shaft 2-3, a bearing housing 2-4, a bearing 2-5, an end cover 2-6, a pinion 2-7, a gear 2-8, a gear support 2-9, and a turntable 2-10. The flipping positioner support 2-1 is connected to the flipping positioner support frame 3. The flipping positioner support frame 3 is equipped with a slide rail, and the flipping positioner support 2-1 is mounted on the slide rail. The flipping positioner support 2-1 can move up and down on the flipping positioner support frame 3. The flipping positioner motor 2-2 is mounted on the flipping positioner support 2-1. The flipping positioner motor 2-2 is the power source, which is powerful and runs stably, ensuring the reliable execution of the flipping action. The flipping positioner motor 2-2 starts and stops quickly and responds promptly, which can effectively improve the efficiency of welding operations. The output shaft 2-3 of the flipping positioner motor 2-2 passes through the motor and then through the bearing housing 2-4. A bearing 2-5 is provided between the output shaft 2-3 and the bearing housing 2-4. End caps 2-6 are provided at both ends of the bearing housing 2-4. A small gear 2-7 is provided at one end of the output shaft 2-3 that passes through the bearing housing 2-4. The small gear 2-7 meshes with the large gear 2-8. The small gear 2-7 and the large gear 2-8 are the core components that realize the flipping function of the flipping positioner 2. The small gear 2-7 and the large gear 2-8 have high tooth profile precision and good meshing performance, which can effectively transmit power and realize the accurate execution of the flipping action. The large gear 2-8 is connected to the turntable 2-10. The output shaft 2-3 drives the small gear 2-7 to rotate, and the small gear 2-7 drives the large gear 2-8. The large gear 2-8 is radially internally connected to the gear support 2-9 through a gear bearing. The gear support 2-9 is connected to the flipping positioner support 2-1. In this embodiment, the various structures of the flipping and positioning machine 2 work closely together to achieve a highly efficient, stable, and precise flipping function, providing strong support and guarantee for the welding operation of the subway traction buffer beam.

[0043] It should be noted that, as a preferred embodiment, such as Figure 1As shown, the turntable of the flipping and positioning machine 2 is connected to the support platform 1 through the first flipping and positioning machine connecting plate 4 and the second flipping and positioning machine connecting plate 5. The first flipping and positioning machine connecting plate 4 is an L-shaped plate, which includes a first vertical connecting plate 4-1 and a first horizontal connecting plate 4-2 connected to each other. The first vertical connecting plate 4-1 is connected to the turntable, and the first horizontal connecting plate 4-2 is connected to the upper surface of the support platform 1. A plurality of first connecting plate reinforcing ribs 4-3 are provided between the first vertical connecting plate 4-1 and the first horizontal connecting plate 4-2. The first connecting plate reinforcing ribs 4-3 further enhance the structural strength of the first flipping and positioning machine connecting plate 4 and prevent deformation caused by uneven stress during welding. In addition, the first connecting plate reinforcing ribs 4-3 can also effectively disperse stress and extend the service life of the connecting plate. The second flipping and positioning machine connecting plate 5 is an L-shaped plate, comprising a second vertical connecting plate 5-1 and a second horizontal connecting plate 5-2 connected to each other. The second vertical connecting plate 5-1 is connected to the turntable, and the second horizontal connecting plate 5-2 is connected to the lower surface of the support platform 1. Multiple second connecting plate reinforcing ribs 5-3 are provided between the second vertical connecting plate 5-1 and the second horizontal connecting plate 5-2, which also serve to enhance structural strength and distribute stress. The synergistic effect of the first flipping and positioning machine connecting plate 4 and the second flipping and positioning machine connecting plate 5 makes the support platform 1 more stable during the flipping process. The first flipping and positioning machine connecting plate 4 and the second flipping and positioning machine connecting plate 5 are connected from the upper and lower surfaces of the support platform 1 respectively, forming an upper and lower clamping structure, which greatly improves the stability of the support platform 1. This design can not only withstand various forces generated during welding but also ensure that the support platform 1 does not shake during flipping, thereby improving welding accuracy and safety.

[0044] It should be noted that, as a preferred embodiment, such as Figure 4As shown, the longitudinal beam clamping device includes a screw clamping mechanism 6 and a support conformal block 7. The screw clamping mechanism 6 includes a clamping mechanism support 6-1, a tilting pressure arm 6-2, a hinge shaft 6-3, a locking pin 6-4, a clamping screw nut 6-5, a clamping screw 6-6, and a clamping rotating lever 6-7. The clamping mechanism support 6-1 is connected to the upper surface of the support platform 1. Hinge holes are provided at corresponding positions of the clamping mechanism support 6-1 and the tilting pressure arm 6-2. The hinge shaft 6-3 passes through the hinge holes of the clamping mechanism support 6-1 and the tilting pressure arm 6-2, connecting the clamping mechanism support 6-1 and the tilting pressure arm 6-2. The clamping mechanism support 6-1 serves as the supporting foundation for the entire screw clamping mechanism 6, ensuring its stability and durability. Solidity is crucial. Through the hinged connection with the flipping pressure arm 6-2, not only can the flipping pressure arm 6-2 be flexibly flipped, but it can also provide stable support force during the clamping process. This design allows the clamping mechanism support 6-1 to maintain its own stability and that of the support platform 1 while bearing a large clamping force, ensuring the reliability and safety of the clamping process. When it is necessary to clamp the longitudinal beam 19, the flipping pressure arm 6-2 is flipped to the working position, and when it is not necessary to clamp, the flipping pressure arm 6-2 can be flipped to the non-working position, which facilitates the installation and removal of the longitudinal beam 19. This flexibility of the flipping pressure arm 6-2 greatly improves work efficiency and reduces the workload of operators. The clamping mechanism support 6-1 and the flipping pressure arm 6-2 are also provided with pin holes at corresponding positions. The locking pin 6-4 passes through the pin holes of the clamping mechanism support 6-1 and the flipping pressure arm 6-2. The locking pin 6-4 is used to fix the flipping pressure arm 6-2 to the clamping mechanism support 6-1 when the flipping pressure arm 6-2 is in the working position, to prevent the flipping pressure arm 6-2 from flipping during the clamping process, thereby ensuring the stable application of the clamping force. The design of the locking pin 6-4 is simple and practical, and the operation is convenient and quick. It can quickly lock and unlock the flipping pressure arm 6-2, improving work efficiency. The free end of the flip-over pressure arm 6-2 is equipped with a clamping nut 6-5. The clamping screw 6-6 is threadedly connected to the clamping nut 6-5. By rotating the clamping screw 6-6, its linear movement within the clamping nut 6-5 can be achieved. This threaded transmission method has the advantages of good self-locking and high transmission accuracy, ensuring that the clamping force applied by the clamping screw 6-6 to the longitudinal beam 19 is stable and reliable. One end of the clamping screw 6-6 abuts against the upper surface of the longitudinal beam 19, and the clamping force can be adjusted according to actual needs to adapt to longitudinal beams 19 of different specifications and sizes, improving the versatility and adaptability of the clamping device. The other end of the clamping screw 6-6 is equipped with a clamping rotating lever 6-7, which is used by the operator to rotate the clamping screw 6-6. Its design facilitates the operator to apply force and has a long operating arm, enabling the rotation of the clamping screw 6-6 with minimal effort. The support conformal block 7 is set on the lower surface of the longitudinal beam 19 and is connected to the upper surface of the support platform 1. The support conformal block 7 is used to support the longitudinal beam 19. The support conformal block 7 is designed according to the shape of the longitudinal beam 19 and can fit tightly against the lower surface of the longitudinal beam 19 to provide stable support for the longitudinal beam 19.The longitudinal beam clamping device in this embodiment achieves stable clamping of the longitudinal beam 19 through the ingenious design and close cooperation of each component. It has the advantages of convenient operation, adjustable clamping force, and strong versatility, providing a reliable guarantee for the welding operation of the subway traction buffer beam.

[0045] It should be noted that, as a preferred embodiment, such as Figure 1 and Figure 2 As shown, the longitudinal beam tensioning device includes a lateral screw tensioning mechanism 8, an end screw tensioning mechanism 9, a lateral limiting block 10, and an end limiting block 11. The lateral screw tensioning mechanism 8 is disposed on the side of the longitudinal beam 19. The lateral limiting block 10 and the lateral screw tensioning mechanism 8 are disposed correspondingly on both sides of the longitudinal beam 19. The end screw tensioning mechanism 9 is disposed on the end face of the longitudinal beam 19. The end limiting block 11 and the end screw tensioning mechanism 9 are disposed correspondingly at both ends of the longitudinal beam 19.

[0046] More specifically, such as Figure 5 As shown, the lateral screw tensioning mechanism 8 includes a lateral tensioning mechanism support 8-1, a lateral tensioning nut 8-2, a lateral tensioning screw 8-3, and a lateral tensioning rotating lever 8-4. The lateral tensioning mechanism support 8-1 is connected to the upper surface of the support platform 1. The lateral tensioning nut 8-2 is located at the upper end of the lateral tensioning mechanism support 8-1. The lateral tensioning screw 8-3 is threadedly connected to the lateral tensioning nut 8-2. One end of the lateral tensioning screw 8-3 abuts against the outer side of the longitudinal beam 19. The lateral tensioning screw 8-3 and the lateral tensioning nut 8-2 are threadedly connected. The lateral tensioning screw 8-3 achieves linear motion through rotation, thereby tensioning the outer side of the longitudinal beam 19. The lateral tensioning screw 8-3 is designed with high strength and rigidity, capable of withstanding large thrust, ensuring the stable fixation of the longitudinal beam 19 in the horizontal direction. The surface of the lateral tensioning screw 8-3 undergoes special treatment, exhibiting excellent wear resistance and corrosion resistance, extending its service life. Furthermore, the thread design of the lateral tensioning screw 8-3 is reasonable, resulting in high transmission efficiency and effortless operation. The other end of the lateral tensioning screw 8-3 is equipped with a lateral tensioning rotating lever 8-4, which provides sufficient torque, allowing operators to easily tighten or loosen the longitudinal beam 19, improving work efficiency. Through the reasonable design and close cooperation of its components, the lateral screw tensioning mechanism 8 achieves stable tensioning of the longitudinal beam 19, offering advantages such as convenient operation, stable thrust, and strong adaptability, providing reliable lateral fixation for the welding operation of the subway traction buffer beam.

[0047] More specifically, such as Figure 6As shown, the end screw tensioning mechanism 9 includes an end tensioning mechanism support 9-1, an end tensioning nut 9-2, an end tensioning screw 9-3, and an end tensioning rotating lever 9-4. The end tensioning mechanism support 9-1 is connected to the upper surface of the support platform 1. The end tensioning nut 9-2 is located on the upper end of the end tensioning mechanism support 9-1. The end tensioning screw 9-3 is threadedly connected to the end tensioning nut 9-2. One end of the end tensioning screw 9-3 abuts against the end face of the longitudinal beam 19 and achieves linear motion through rotation to tighten the end face of the longitudinal beam 19. The thread has high transmission efficiency, is easy to operate, and can accurately control the magnitude of the tensioning force, adapting to longitudinal beams 19 of different specifications. The other end of the end tensioning screw 9-3 is provided with an end tensioning rotating lever 9-4. The end screw tensioning mechanism 9 achieves stable tensioning of the end face of the longitudinal beam 19 through the reasonable design and close cooperation of each component. It has the advantages of convenient operation, stable thrust, and strong adaptability, and provides reliable end fixation for the welding operation of the subway traction buffer beam.

[0048] It should be noted that, as a preferred embodiment, such as Figure 7As shown, the center positioning device includes a screw locking mechanism 12, a sliding guide seat 13, a connecting seat 14, a positioning plate 15, a positioning pin 16, a stop block 17, and a limit block 18. The screw locking mechanism 12 is disposed on the upper surface of the support platform 1. The sliding guide seat 13 is disposed between the screw locking mechanism 12 and the crossbeam 20, and the sliding guide seat 13 is disposed on the upper surface of the support platform 1. The upper surface of the sliding guide seat 13 is provided with a slide rail. The connecting seat 14 is disposed on the slide rail. The connecting seat 14 includes a horizontal plate 14-1. The connecting seat 14 consists of a vertical plate 14-2, a reinforcing rib 14-3, and a connecting plate 14-4. The horizontal plate 14-1 and vertical plate 14-2 are interconnected to form an L-shape. This L-shaped design allows the connecting seat 14 to provide stable support and connection in both horizontal and vertical directions. The reinforcing rib 14-3 is positioned between the horizontal plate 14-1 and the vertical plate 14-2, further enhancing the structural strength of the connecting seat 14 and preventing deformation due to uneven stress during welding. The horizontal plate 14-1 is mounted on a slide rail, the vertical plate 14-2 is connected to the positioning plate 15, and the connecting plate 14-4 is positioned on the upper surface of the horizontal plate 14-1. Both ends of the connecting plate 14-4 are connected to the reinforcing rib 14-3, further improving the overall stability of the connecting seat 14. Connecting plate 14-4 is set on the upper surface of horizontal plate 14-1 and is connected to screw locking mechanism 12, enabling precise displacement control of connecting seat 14 through screw locking mechanism 12. Positioning plate 15 and crossbeam 20 are provided with positioning holes at their four corners. Positioning pin 16 passes through the positioning holes of positioning plate 15 and crossbeam 20, fixing crossbeam 20 to positioning plate 15. Positioning pin 16 is simple and practical in design, easy and quick to operate, and can quickly achieve positioning and fixing of crossbeam 20. Its material has high strength and hardness, and can withstand large tensile and compressive forces, ensuring the stability of crossbeam 20 during welding. The surface of positioning pin 16 is precision machined, has high precision, and can fit tightly with the positioning holes. Stop block 17 is located at the bottom side of horizontal plate 14-1, and limit block 18 is located on the side of sliding guide seat 13. Stop block 17 and limit block 18 cooperate to position crossbeam 20. The design of the stop block 17 and the limit block 18 effectively limits the sliding range of the connecting seat 14, ensuring the stability of the crossbeam 20 during the welding process. Their materials possess high strength and wear resistance, capable of withstanding frequent impacts and friction, thus extending their service life. The installation position of the limit block 18 is adjustable, allowing for adjustments according to different welding requirements, improving the flexibility and adaptability of the tooling. In summary, the center positioning device, through the rational design and close cooperation of its components, achieves precise positioning and fixation of the crossbeam 20, offering advantages such as convenient operation, high positioning accuracy, and strong stability, providing reliable center positioning support for the welding operation of the subway traction buffer beam.

[0049] It should be noted that, as a preferred embodiment, the screw locking mechanism 12 includes a locking mechanism support 12-1, a locking screw 12-2, and a locking rotating lever 12-3. The locking mechanism support 12-1 is disposed on the upper surface of the support platform 1. The locking mechanism support 12-1 has a through hole with internal threads. The locking screw 12-2 passes through the through hole and is threadedly connected to the locking mechanism support 12-1. One end of the locking screw 12-2 is connected to the connecting plate 14-4, and the other end of the locking screw 12-2 is provided with the locking rotating lever 12-3. Through the reasonable design and tight cooperation of each component, the screw locking mechanism 12 achieves stable locking of the crossbeam 20. It has the advantages of convenient operation, stable locking force, and strong adaptability, providing reliable locking support for the welding operation of the subway traction buffer beam.

[0050] It should be noted that, in this embodiment, specifically, the flipping pressure arm 6-2 is welded to the clamping nut 6-5, the clamping mechanism support 6-1 is fixed to the support platform 1 by screws, the lateral pushing mechanism support 8-1 is fixed to the support platform 1 by screws, the end pushing mechanism support 9-1 is fixed to the support platform 1 by screws, the locking mechanism support 12-1 is fixed to the support platform 1 by screws, and the sliding guide seat 12 is fixed to the support platform 1 by screws.

[0051] In use, the lead screw locking mechanism 12 and the sliding guide seat 13 are fastened to the support platform 1 with screws. The bottom of the connecting seat 14 is placed in the slide rail of the sliding guide seat 13. The positioning plate 15 is fixed to the vertical surface of the connecting seat 14 with screws, and the stop block 17 is fixed to the bottom side of the connecting seat 14 with screws. The positioning pin 16 is passed through the positioning hole on the crossbeam and the positioning hole on the positioning plate 15, and tightened with a nut. The lead screw locking mechanism 12 is tightened until the stop block 17 presses against the limit stop block 18, thus completing the positioning of the crossbeam 20. Next, place the two longitudinal beams 19 on the support conformal block 7, aligning them with the lateral limiting block 10 and the end limiting block 11. Rotate the clamping screw 6-6, the lateral pushing screw 8-3, and the end pushing screw 9-3, using the screw clamping mechanism 6, the lateral screw pushing mechanism 8, and the end screw pushing mechanism 9 to clamp the two longitudinal beams, ensuring the accuracy of important dimensions such as the distance between the two longitudinal beams and the centering of the traction buffer beam, and preventing deformation after welding. Perform welding. After the front welding is completed, use the flipping and positioning machine 2 to flip the support table 1 and weld the bottom positions of the longitudinal beams and the crossbeams. After welding is completed, flip the support table 1 back to complete the welding of the subway traction buffer beam. Loosen the screw clamping mechanism 6, the lateral screw pushing mechanism 8, and the end screw pushing mechanism 9, then unscrew the nut on the positioning pin 16, open the screw locking mechanism 12, and remove the subway traction buffer beam. The entire welding work is complete.

[0052] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A welding fixture for a subway traction buffer beam, used to fix the subway traction buffer beam, the subway traction buffer beam comprising two longitudinal beams (19) and one transverse beam (20), the two longitudinal beams (19) being connected to the left and right ends of the transverse beam (20) respectively, characterized in that, include Support platform (1), the support platform (1) is used to place the subway traction buffer beam, and the place where the beam is placed is a hollow structure; The flipping and positioning machine (2) consists of two machines, which are respectively located at the left and right ends of the support platform (1). The flipping and positioning machine (2) is used to flip the support platform (1). A flipping and positioning machine support frame (3) is provided, wherein the flipping and positioning machine (2) is mounted on the flipping and positioning machine support frame (3); Longitudinal beam clamping device, wherein there are multiple longitudinal beam clamping devices, all of which are arranged on the upper surface of the support platform (1) and along the placement direction of the longitudinal beam (19). The longitudinal beam clamping device is used to clamp the longitudinal beam (19) in the vertical direction. Longitudinal beam pushing device, there are multiple longitudinal beam pushing devices, all of which are arranged on the upper surface of the support platform (1) and along the placement direction of the longitudinal beam (19). The longitudinal beam pushing device is used to push the longitudinal beam (19) in the horizontal direction. A central positioning device is disposed on the upper surface of the support platform (1) and is used to position and fix the crossbeam (20).

2. The welding fixture for a subway traction buffer beam according to claim 1, characterized in that, The flipping and positioning machine (2) includes a flipping and positioning machine support (2-1), a flipping and positioning machine motor (2-2), an output shaft (2-3), a bearing housing (2-4), a bearing (2-5), an end cover (2-6), a pinion (2-7), a large gear (2-8), a gear support (2-9), and a turntable (2-10). The flipping and positioning machine support (2-1) is connected to the flipping and positioning machine support frame (3). The flipping and positioning machine motor (2-2) is mounted on the flipping and positioning machine support (2-1). The output shaft (2-3) of the flipping and positioning machine motor (2-2) passes through the flipping and positioning machine motor (2-2) and then through the turntable (2-10). The bearing housing (2-4) is provided with a bearing (2-5) between the output shaft (2-3) and the bearing housing (2-4). The bearing housing (2-4) has end caps (2-6) at both ends. The output shaft (2-3) has a small gear (2-7) at one end that passes through the bearing housing (2-4). The small gear (2-7) meshes with the large gear (2-8). The large gear (2-8) is radially and internally connected to the gear support (2-9) through a gear bearing. The gear support (2-9) is connected to the flipping and positioning machine support (2-1). The large gear (2-8) is connected to the turntable (2-10).

3. The welding fixture for a subway traction buffer beam according to claim 2, characterized in that, The turntable of the flipping and positioning machine (2) is connected to the support platform (1) via a first flipping and positioning machine connecting plate (4) and a second flipping and positioning machine connecting plate (5). The first flipping and positioning machine connecting plate (4) is an L-shaped plate, which includes a first vertical connecting plate (4-1) and a first horizontal connecting plate (4-2) connected to each other. The first vertical connecting plate (4-1) is connected to the turntable, and the first horizontal connecting plate (4-2) is connected to the upper surface of the support platform (1). The first vertical connecting plate (4-1) is connected to the first horizontal connecting plate (4-2). Multiple first connecting plate reinforcing ribs (4-3) are provided between the connecting plates (4-2). The second flipping and positioning machine connecting plate (5) is an L-shaped plate. The second flipping and positioning machine connecting plate (5) includes a second vertical connecting plate (5-1) and a second horizontal connecting plate (5-2) that are connected to each other. The second vertical connecting plate (5-1) is connected to the turntable, and the second horizontal connecting plate (5-2) is connected to the lower surface of the support platform (1). Multiple second connecting plate reinforcing ribs (5-3) are provided between the second vertical connecting plate (5-1) and the second horizontal connecting plate (5-2).

4. The welding fixture for a subway traction buffer beam according to claim 1, characterized in that, The flipping and positioning machine support frame (3) is provided with a slide rail, and the flipping and positioning machine support is set on the slide rail.

5. The welding fixture for a subway traction buffer beam according to claim 1, characterized in that, The longitudinal beam clamping device includes a screw clamping mechanism (6) and a support conformal block (7). The screw clamping mechanism (6) includes a clamping mechanism support (6-1), a flipping pressure arm (6-2), a hinge shaft (6-3), a locking pin (6-4), a clamping screw nut (6-5), a clamping screw (6-6), and a clamping rotating lever (6-7). The clamping mechanism support (6-1) is connected to the upper surface of the support platform (1). The clamping mechanism support (6-1) and the flipping pressure arm (6-2) are provided with hinge holes at corresponding positions. The hinge shaft (6-3) passes through the hinge holes of the clamping mechanism support (6-1) and the flipping pressure arm (6-2) to connect the clamping mechanism support (6-1) and the flipping pressure arm (6-2). (6-1) A pin hole is also provided at the corresponding position of the flipping pressure arm (6-2). The locking pin (6-4) passes through the pin hole of the pressing mechanism support (6-1) and the flipping pressure arm (6-2). The free end of the flipping pressure arm (6-2) is provided with the pressing nut (6-5). The pressing screw (6-6) is threadedly connected to the pressing nut (6-5). One end of the pressing screw (6-6) abuts against the upper surface of the longitudinal beam (19). The other end of the pressing screw (6-6) is provided with the pressing rotating lever (6-7). The support conformal block (7) is provided on the lower surface of the longitudinal beam (19). The support conformal block (7) is connected to the upper surface of the support platform (1). The support conformal block (7) is used to support the longitudinal beam (19).

6. The welding fixture for a subway traction buffer beam according to claim 1, characterized in that, The longitudinal beam tensioning device includes a lateral screw tensioning mechanism (8), an end screw tensioning mechanism (9), a lateral limiting block (10), and an end limiting block (11). The lateral screw tensioning mechanism (8) is located on the side of the longitudinal beam (19). The lateral limiting block (10) and the lateral screw tensioning mechanism (8) are located on opposite sides of the longitudinal beam (19). The end screw tensioning mechanism (9) is located on the end face of the longitudinal beam (19). The end limiting block (11) and the end screw tensioning mechanism (9) are located on opposite ends of the longitudinal beam (19).

7. The welding fixture for a subway traction buffer beam according to claim 6, characterized in that, The lateral screw tensioning mechanism (8) includes a lateral tensioning mechanism support (8-1), a lateral tensioning nut (8-2), a lateral tensioning screw (8-3), and a lateral tensioning rotating lever (8-4). The lateral tensioning mechanism support (8-1) is connected to the upper surface of the support platform (1). The lateral tensioning nut (8-2) is located at the upper end of the lateral tensioning mechanism support (8-1). The lateral tensioning screw (8-3) is threadedly connected to the lateral tensioning nut (8-2). One end of the lateral tensioning screw (8-3) abuts against the outer side of the longitudinal beam (19), and the other end of the lateral tensioning screw (8-3) is provided with the lateral tensioning rotating lever (8-4).

8. The welding fixture for a subway traction buffer beam according to claim 6, characterized in that, The end screw tensioning mechanism (9) includes an end tensioning mechanism support (9-1), an end tensioning nut (9-2), an end tensioning screw (9-3), and an end tensioning rotating lever (9-4). The end tensioning mechanism support (9-1) is connected to the upper surface of the support platform (1). The end tensioning nut (9-2) is located at the upper end of the end tensioning mechanism support (9-1). The end tensioning screw (9-3) is threadedly connected to the end tensioning nut (9-2). One end of the end tensioning screw (9-3) abuts against the end face of the longitudinal beam (19), and the other end of the end tensioning screw (9-3) is provided with the end tensioning rotating lever (9-4).

9. The welding fixture for a subway traction buffer beam according to claim 1, characterized in that, The center positioning device includes a screw locking mechanism (12), a sliding guide seat (13), a connecting seat (14), a positioning plate (15), a positioning pin (16), a stop block (17), and a limiting block (18). The screw locking mechanism (12) is disposed on the upper surface of the support platform (1). The sliding guide seat (13) is disposed between the screw locking mechanism (12) and the crossbeam (20), and the sliding guide seat (13) is disposed on the upper surface of the support platform (1). The upper surface of the sliding guide seat (13) is provided with a slide rail. The connecting seat (14) is disposed on the slide rail. The connecting seat (14) includes a horizontal plate (14-1), a vertical plate (14-2), a reinforcing rib (14-3), and a connecting plate (14-4). The horizontal plate (14-1) and the vertical plate (14-2) are connected to each other to form an L-shape. The horizontal plate (14-1) is disposed on the slide rail. The vertical plate (14-3) is disposed on the slide rail. The connecting plate (14-4) includes a horizontal plate (14-1), a vertical plate (14-2), a reinforcing rib (14-3), and a connecting plate (14-4). The horizontal plate (14-1) and the vertical plate (14-2) are connected to each other to form an L-shape. The horizontal plate (14-1) is disposed on the slide rail. The vertical plate (14-3) and the vertical plate (14-4) are connected to each other to form an L-shape. 2) Connected to the positioning plate (15), the reinforcing rib (14-3) is disposed between the horizontal plate (14-1) and the vertical plate (14-2), the connecting plate (14-4) is disposed on the upper surface of the horizontal plate (14-1), and both ends of the connecting plate (14-4) are connected to the reinforcing rib (14-3), the connecting plate (14-4) is connected to the screw locking mechanism (12), and the positioning plate (15) is connected to the crossbeam (20). The four corners are provided with positioning holes. The positioning pin (16) passes through the positioning holes of the positioning plate (15) and the crossbeam (20) to fix the crossbeam (20) on the positioning plate (15). The stop block (17) is located at the bottom of the side of the horizontal plate (14-1). The limiting block (18) is located on the side of the sliding guide seat (13). The stop block (17) and the limiting block (18) cooperate to position the crossbeam (20).

10. A welding fixture for a subway traction buffer beam according to claim 9, characterized in that, The lead screw locking mechanism (12) includes a locking mechanism support (12-1), a locking lead screw (12-2), and a locking rotating lever (12-3). The locking mechanism support (12-1) is disposed on the upper surface of the support platform (1). The locking mechanism support (12-1) is provided with a through hole with internal threads. The locking lead screw (12-2) passes through the through hole and is threadedly connected to the locking mechanism support (12-1). One end of the locking lead screw (12-2) is connected to the connecting plate (14-4), and the other end of the locking lead screw (12-2) is provided with the locking rotating lever (12-3).

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