Welding device for axle housing assembly of heavy truck axle

Abstract

The invention relates to the field of welding facilities, in particular to a welding device for an axle housing assembly of a heavy truck axle, which comprises a welding table, a central support pillar is fixedly mounted in the middle of the upper end of the welding table, pillar seats are fixedly mounted on two sides, close to the central support pillar, of the upper end of the welding table, and supporting plates are fixedly mounted at the upper ends of the pillar seats. Two limiting plates are symmetrically embedded in the two ends of each column base, the limiting plates are obliquely arranged, the limiting plates on the two column bases are symmetrically arranged, a welding piece is arranged above the central jacking column and connected with a welding table, the lower end of the welding piece is connected with a carrying column, and the carrying column and the central jacking column are coaxial. The welding convenience and the welding efficiency are improved, and meanwhile it is ensured that no gap exists between the reinforcing ring and the axle housing after welding.

Description

Technical Field

[0001] The invention relates to the field of welding facilities, and in particular to a welding device used for a bridge housing assembly of a heavy truck bridge. Background Art

[0002] The heavy-duty truck axle housing is the basic part for installing the main reducer, differential, half shaft, wheel hub and suspension. It is one of the important components of the heavy-duty truck driving system. Its design, manufacturing and maintenance are directly related to the performance and service life of the heavy-duty truck. The axle housing reinforcement ring is an annular structure externally connected to the axle housing body. Its main function is to enhance the strength and stability of the axle housing body. Through the reinforcement of the reinforcement ring, the axle housing can better withstand the vehicle's load and various stresses during driving, thereby improving the service life and safety of the axle housing.

[0003] The bridge housing and the reinforcement ring are usually assembled together by welding. However, when welding the two with existing welding equipment, workers are required to manually position the two so that they can be accurately connected. After positioning, the two are clamped and fixed before welding. The operation process is quite cumbersome, resulting in inconvenient welding. In addition, the positioning and clamping process is time-consuming, which seriously affects the welding efficiency. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the background technology and to propose a welding device for the bridge housing assembly of a heavy truck bridge.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a welding device for a bridge shell assembly of a heavy truck bridge, comprising a welding platform, a center top column is fixedly installed in the middle of the upper end of the welding platform, column seats are fixedly installed on both sides of the upper end of the welding platform close to the center top column, a support plate is fixedly installed on the upper end of the column seat, two limit plates are symmetrically inlaid at both ends of the column seat, the limit plates are inclined, and the limit plates on the two column seats are symmetrically arranged, a welding part is arranged above the center top column, the welding part is connected to the welding platform, the lower end of the welding part is connected to a carrier column, the carrier column is coaxial with the center top column, a plurality of guide frames are slidably installed in a ring array at the lower end of the carrier column, a push ring column is connected to the end of the guide frame, a push cap is elastically installed on the outer surface of the carrier column, and a push column frame is rotatably installed between the push cap and the guide frame.

[0006] Preferably, an L-shaped fixing frame is fixedly installed on the lower end of the push ring column, the upper end of the L-shaped fixing frame is fixed to the guide frame, a return spring is wound around the outer side of the carrier column, the upper end of the return spring is fixed to the lower end of the push cap, the lower end of the return spring is fixed to the lower end of the carrier column, and a guide shell is slidably installed on the outer surface of the guide frame, and the end of the guide shell is fixed to the carrier column.

[0007] Preferably, the welding part includes a ring seat coaxially arranged above the central top column, a shell seat is fixedly installed on the upper end of the ring seat, a carrier is slidably installed on the rear end of the shell seat, a bracket is fixedly installed on the rear end of the carrier, the bracket is fixed on the welding table, a threaded rod is rotatably installed between the upper and lower end surfaces of the carrier, the shell seat is screwed on the threaded rod, the upper end of the threaded rod passes through the upper end of the carrier, a No. 2 servo motor is fixedly installed on the upper end of the carrier, and the output end of the No. 2 servo motor is fixed to the threaded rod.

[0008] Preferably, a propulsion ring is coaxially rotatably mounted on the lower end of the ring seat, a gear ring is coaxially inlaid on the outer surface of the propulsion ring, a gun rack is fixedly mounted at the front end of the propulsion ring near the bottom of the gear ring, a welding gun is fixedly mounted on the end of the gun rack, a wheel rack is fixedly mounted on the lower end of the gun rack, pressure ring wheels are mounted on both ends of the wheel rack, and the gun head of the welding gun corresponds to the center position between the two pressure ring wheels.

[0009] Preferably, a servo motor No. 1 is fixedly installed at the center position of the inner bottom surface of the shell seat, and a gear shaft is rotatably installed through the inner bottom surface of the shell seat near the front edge. A large pulley is coaxially embedded in the upper end of the gear shaft, and a small pulley is coaxially embedded in the output end of the servo motor No. 1. A transmission belt is connected between the small pulley and the large pulley, and a pinion is coaxially embedded in the lower end of the gear shaft, and the pinion is meshed with a gear ring.

[0010] Preferably, a fixed column is coaxially fixedly installed inside the ring seat, a pressure cap is slidably installed on the upper outer surface of the carrier column, a frame is fixedly installed on the outer surface of the pressure cap, the middle part of the upper end of the frame is fixed to the fixed column, and the carrier column is coaxial with the fixed column.

[0011] Preferably, a limiting cap is fitted on the upper end of the pressing cap, the limiting cap is embedded in the outer surface of the supporting column, an adaptable spring is fixedly installed on the lower end of the pressing cap, the end of the adaptable spring is fixed to the upper end of the push cap, and the supporting column runs through the interior of the adaptable spring.

[0012] Preferably, a slide groove is provided on the outer surface of the supporting column, and sliding blocks are extended from the inner surfaces of the push cap and the pressure cap, and the sliding blocks are slidably installed inside the slide groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Place the bridge shell on the support plate for support. At this time, the limit plates on the two column seats are fitted to the inclined surfaces around the bridge shell to position the bridge shell so that the center of the bridge shell coincides with the center top column. Then, place the reinforcement ring on the area to be welded on the bridge shell. When the shell seat drives the welding gun to move down for welding, the carrier column will move down synchronously and resist against the center top column. Then, the shell seat continues to move down, allowing the pressure cap to slide on the surface of the carrier column so that the pressure cap can press the push cap through the adaptation spring. At this time, the reset spring contracts, allowing the push cap to move down normally, so that the downward-moving push cap can drive the push column frame to move, so as to push multiple push ring columns at the same time, so that the multiple push ring columns expand outward synchronously under the guidance of the guide frame and the guide shell, so as to push the reinforcement ring from the inner wall of the reinforcement ring, so that the reinforcement ring and the bridge shell can align themselves together for welding. The process does not require workers to manually position and clamp the reinforcement ring and the bridge shell, thereby effectively improving the convenience and efficiency of welding.

[0015] 2. When the push ring column aligns the reinforcement ring and the bridge housing, the push ring column will remain stationary due to the restriction of the inner wall of the reinforcement ring, and then the push cap will remain stationary. At this time, the shell seat continues to move downward, allowing the pressure ring wheel to continue to move downward. During this process, the pressure cap continues to slide on the carrier column and adapt to the contraction deformation of the spring, so that the downward movement of the pressure ring wheel will not be hindered, and the pressure ring wheel can move downward to press tightly on the reinforcement ring. When the welding gun is rotating for welding, the pressure ring wheel can roll synchronously on the reinforcement ring to press the reinforcement ring and the bridge housing firmly together, to ensure that there will be no gap between the reinforcement ring and the bridge housing after welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a welding device for a bridge housing assembly of a heavy truck bridge according to the present invention;

[0017] Figure 2 It is a schematic diagram of a carrier of a welding device for a bridge housing assembly of a heavy truck bridge according to the present invention;

[0018] Figure 3 The invention provides a welding device for the bridge shell assembly of a heavy truck bridge. Figure 1 A magnified view of middle;

[0019] Figure 4 The invention provides a welding device for the bridge shell assembly of a heavy truck bridge. Figure 2 Enlarged view of middle B;

[0020] Figure 5 It is a schematic diagram of a gun frame of a welding device for a bridge housing assembly of a heavy truck bridge according to the present invention;

[0021] Figure 6 It is a schematic diagram of a fixing column of a welding device for a bridge housing assembly of a heavy truck bridge according to the present invention;

[0022] Figure 7 It is a schematic diagram of a support column of a welding device for a bridge housing assembly of a heavy truck bridge according to the present invention;

[0023] Figure 8 This is a view of the use of a welding device for a bridge housing assembly of a heavy truck bridge according to the present invention;

[0024] Fig. 9 The invention provides a welding device for the bridge shell assembly of a heavy truck bridge. Figure 8 Enlarged view of C in the middle.

[0025] In the figure: 1. welding table; 2. bracket; 3. carrier; 4. servo motor No. 1; 5. servo motor No. 2; 6. threaded rod; 7. shell seat; 8. slide groove; 9. small gear; 10. gear ring; 11. push ring; 12. gun rack; 13. wheel rack; 14. welding gun; 15. slider; 16. pressure ring wheel; 17. small pulley; 18. large pulley; 19. transmission belt; 20. ring seat; 21. gear shaft; 22. fixed column; 23. column seat; 24. support plate; 25. limit plate; 26. center top column; 27. carrier column; 28. reset spring; 29. ​​push cap; 30. adaptive spring; 31. pressure cap; 32. limit cap; 33. frame; 34. push ring column; 35. push column frame; 36. guide shell; 37. guide frame; 38. L-shaped fixed frame; 39. reinforcement ring; 40. bridge shell. DETAILED DESCRIPTION

[0026] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0027] like Figure 1-Figure 9The welding device shown in the figure is used for the bridge shell assembly of a heavy truck bridge, including a welding platform 1, a central top column 26 is fixedly installed in the middle of the upper end of the welding platform 1, and column seats 23 are fixedly installed on both sides of the upper end of the welding platform 1 near the central top column 26. The central top column 26 plays a role in supporting the supporting column 27. A supporting plate 24 is fixedly installed on the upper end of the column seat 23. The column seat 23 plays a role in supporting the supporting plate 24 and the limiting plate 25. Two limiting plates 25 are symmetrically inlaid at both ends of the column seat 23. The supporting plate 24 plays a role in supporting the supporting plate 24 and the limiting plate 25. The limit plate 25 is inclined to support the bridge housing 40, and can adapt to the inclined surface around the bridge housing 40, so as to use the inclined surface to position the bridge housing 40, so that the center of the bridge housing 40 coincides with the center top column 26, and at the same time, the center of the bridge housing 40 coincides with the rotation center of the welding gun 14, so as to ensure that the movement trajectory of the welding gun 14 can match the seam of the bridge housing 40 and the reinforcement ring 39 during subsequent welding. The limit plates 25 on the two column seats 23 are symmetrically arranged, and a welding The welding piece is connected to the welding platform 1, and the lower end of the welding piece is connected with a supporting column 27, and the supporting column 27 is coaxial with the central top column 26. A plurality of guide frames 37 are slidably installed in an annular array at the lower end of the supporting column 27, and the guide frame 37 plays a role in supporting the push ring column 34. The end of the guide frame 37 is connected with the push ring column 34. When the supporting column 27 and the central top column 26 are abutted, so that the push ring column 34 is pressed against the inner wall of the reinforcing ring 39, the upper end surface of the push ring column 34 will be lower than the upper end surface of the reinforcing ring 39, so that the subsequent pressure ring wheel 16 is in the reinforcement When the upper end of the strengthening ring 39 rolls, it will not be hindered by the push ring column 34. A push cap 29 is elastically installed on the outer surface of the carrier column 27. A push column frame 35 is rotatably installed between the push cap 29 and the guide frame 37. The push cap 29 can drive the push column frame 35 to move, so as to push multiple push ring columns 34 at the same time, so that the multiple push ring columns 34 can expand outward synchronously under the guidance of the guide frame 37 and the guide shell 36, so as to push the strengthening ring 39 from the inner wall of the strengthening ring 39, so that the strengthening ring 39 and the bridge shell 40 can be aligned together by themselves.

[0028] An L-shaped fixing frame 38 is fixedly installed on the lower end of the push ring column 34, and the upper end of the L-shaped fixing frame 38 is fixed to the guide frame 37. The push ring column 34 is connected and fixed by the L-shaped fixing frame 38, which can ensure that the pressure ring wheel 16 will not be hindered when rolling on the upper end of the reinforcement ring 39. A return spring 28 is wrapped around the outer side of the carrier column 27, and the upper end of the return spring 28 is fixed to the lower end of the push cap 29, and the lower end of the return spring 28 is fixed to the lower end of the carrier column 27. The return spring 28 plays a role in resetting the push cap 29 after movement. A guide shell 36 is slidably installed on the outer surface of the guide frame 37, and the end of the guide shell 36 is fixed to the carrier column 27. The guide shell 36 and the guide frame 37 play a role in guiding the push ring column 34.

[0029] The welding part includes a ring seat 20 coaxially arranged above the central top column 26, and a shell seat 7 is fixedly installed on the upper end of the ring seat 20. The ring seat 20 serves to bear the propulsion ring 11. A carrier 3 is slidably installed on the rear end of the shell seat 7. The carrier 3 serves to guide the shell seat 7. A bracket 2 is fixedly installed on the rear end of the carrier 3. The bracket 2 is fixed on the welding platform 1. The bracket 2 serves to fix the carrier 3. A threaded rod 6 is rotatably installed between the upper and lower end surfaces of the inner part of the carrier 3. The shell seat 7 is screwed on the threaded rod 6. The threaded rod 6 serves to drive the shell seat 7 to move up and down. The upper end of the threaded rod 6 passes through the upper end of the carrier 3. A No. 2 servo motor 5 is fixedly installed on the upper end of the carrier 3. The No. 2 servo motor 5 serves to drive the threaded rod 6 to rotate, and the output end of the No. 2 servo motor 5 is fixed to the threaded rod 6.

[0030] A thrust ring 11 is coaxially mounted on the lower end of the ring seat 20, and the thrust ring 11 can drive the welding gun 14 to rotate in a circle to fully weld the joint between the reinforcement ring 39 and the bridge housing 40. A gear ring 10 is coaxially inlaid on the outer surface of the thrust ring 11. A gun rack 12 is fixedly mounted on the front end of the thrust ring 11 near the bottom of the gear ring 10, and a welding gun 14 is fixedly mounted on the end of the gun rack 12. The gun rack 12 serves to fix the welding gun 14, and the welding gun 14 is connected to an external welding machine for use. Since welding with the welding gun 14 is a prior art and has been widely used, it is not elaborated in detail here. A wheel frame 13 is fixedly mounted on the lower end of the gun rack 12, and pressure ring wheels 16 are mounted on both ends of the wheel frame 13. The wheel frame 13 serves to carry the pressure ring wheel 16, and the gun head of the welding gun 14 corresponds to the center position between the two pressure ring wheels 16, which can ensure that the reinforcement ring 39 and the bridge housing 40 are firmly pressed together and then welded by the welding gun 14.

[0031] A servo motor No. 4 is fixedly installed at the center position of the inner bottom surface of the shell seat 7. A gear shaft 21 is rotatably installed through the inner bottom surface of the shell seat 7 near the front edge. The servo motor No. 4 drives the gear shaft 21 to rotate. A large pulley 18 is coaxially inlaid on the upper end of the gear shaft 21, and a small pulley 17 is coaxially inlaid on the output end of the servo motor No. 4. A transmission belt 19 is connected between the small pulley 17 and the large pulley 18. The small pulley 17 and the large pulley 18 connect the transmission belt 19, and the transmission belt 19 transmits the power. A pinion 9 is coaxially inlaid on the lower end of the gear shaft 21. The pinion 9 is meshed with the gear ring 10. The pinion 9 can drive the gear ring 10 to rotate, thereby driving the propulsion ring 11 to rotate.

[0032] A fixed column 22 is coaxially fixedly installed inside the ring seat 20, and a pressure cap 31 is slidably installed on the upper outer surface of the carrier column 27. The fixed column 22 plays a connecting and fixing role. A frame 33 is fixedly installed on the outer surface of the pressure cap 31. The middle part of the upper end of the frame 33 is fixed to the fixed column 22. The frame 33 can push the pressure cap 31. The carrier column 27 is coaxial with the fixed column 22.

[0033] The upper end of the pressing cap 31 is fitted with a limiting cap 32, and the limiting cap 32 is embedded in the outer surface of the supporting column 27. The limiting cap 32 prevents the pressing cap 31 and the supporting column 27 from separating. The lower end of the pressing cap 31 is fixedly installed with an adaptable spring 30, and the end of the adaptable spring 30 is fixed to the upper end of the push cap 29. On the one hand, the adaptable spring 30 can push the push cap 29, and on the other hand, it can allow the pressure ring wheel 16 to move down to press on the reinforcing ring 39 without obstruction. The supporting column 27 runs through the interior of the adaptable spring 30.

[0034] A slide groove 8 is provided on the outer surface of the support column 27, and sliders 15 are extended from the inner surfaces of the push cap 29 and the pressure cap 31. The slide groove 8 and the slider 15 prevent the push cap 29 and the pressure cap 31 from rotating. The slider 15 is slidably installed inside the slide groove 8.

[0035] During welding, the bridge housing 40 is placed on the support plate 24 for support. At this time, the limit plates 25 on the two column seats 23 are fitted to the inclined surfaces around the bridge housing 40 to position the bridge housing 40 so that the center of the bridge housing 40 coincides with the center top column 26. Then, the reinforcement ring 39 is placed on the area to be welded on the bridge housing 40. Then, the second servo motor 5 drives the threaded rod 6 to rotate, so that the housing seat 7 screwed on the threaded rod 6 can slide down on the carrier 3, thereby driving the welding gun 14, the carrier column 27 and other components to move down synchronously. When the carrier column 27 moves down, After reaching the position against the central top column 26, the carrier column 27 remains stationary, and then the shell seat 7 continues to move downward, allowing the pressure cap 31 to slide on the surface of the carrier column 27, so that the pressure cap 31 can press the push cap 29 through the adaptation spring 30. At this time, the reset spring 28 contracts, allowing the push cap 29 to move downward normally, so that the push cap 29 that moves downward drives the push column frame 35 to move, so as to push the multiple push ring columns 34 at the same time, so that the multiple push ring columns 34 are synchronously expanded outward under the guidance of the guide frame 37 and the guide shell 36, so as to push the reinforcement ring 39 from the inner wall of the reinforcement ring 39. 9 is pushed so that the reinforcing ring 39 and the bridge housing 40 can be aligned together by themselves. At this time, the push ring column 34 is restricted by the inner wall of the reinforcing ring 39 and remains stationary, thereby keeping the push cap 29 stationary. Then the housing seat 7 continues to move downward, allowing the pressure ring wheel 16 to continue to move downward. During this process, the pressure cap 31 continues to slide on the carrier column 27 and adapts to the contraction deformation of the spring 30, so that the downward movement of the pressure ring wheel 16 will not be hindered, so that the pressure ring wheel 16 can move downward to be pressed on the reinforcing ring 39. At the same time, the gun head of the welding gun 14 corresponds to the reinforcing ring 39 and the bridge housing 40. The joint of the bridge housing 40 is welded, and then the No. 1 servo motor 4 works to drive the gear shaft 21 to rotate through the transmission belt 19, so that the gear shaft 21 drives the gear ring 10 to rotate through the pinion 9, and then drives the welding gun 14 on the propulsion ring 11 to rotate in a circle, so as to weld the joint of the reinforcement ring 39 and the bridge housing 40. During this process, the pressure ring wheel 16 will roll synchronously on the reinforcement ring 39 to press the reinforcement ring 39 and the bridge housing 40 firmly together and be welded, so as to ensure that there will be no gap between the reinforcement ring 39 and the bridge housing 40 after welding.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A welding device for a bridge housing assembly of a heavy truck bridge, comprising a welding station (1), characterized in that: A central top column (26) is fixedly installed in the middle of the upper end of the welding platform (1), column seats (23) are fixedly installed on both sides of the upper end of the welding platform (1) close to the central top column (26), a supporting plate (24) is fixedly installed on the upper end of the column seat (23), two limiting plates (25) are symmetrically inlaid at both ends of the column seat (23), the limiting plates (25) are arranged in an inclined manner, and the limiting plates (25) on the two column seats (23) are symmetrically arranged. A welding part is arranged, the welding part is connected to the welding platform (1), the lower end of the welding part is connected to a supporting column (27), the supporting column (27) is coaxial with the central top column (26), a plurality of guide frames (37) are slidably mounted in an annular array at the lower end of the supporting column (27), the end of the guide frame (37) is connected to a push ring column (34), a push cap (29) is elastically mounted on the outer surface of the supporting column (27), and a push column frame (35) is rotatably mounted between the push cap (29) and the guide frame (37).

2. The welding device for the axle housing assembly of a heavy truck axle according to claim 1 is characterized in that: An L-shaped fixing frame (38) is fixedly installed on the lower end of the push ring column (34), and the upper end of the L-shaped fixing frame (38) is fixed to the guide frame (37). A return spring (28) is wound around the outer side of the support column (27), and the upper end of the return spring (28) is fixed to the lower end of the push cap (29), and the lower end of the return spring (28) is fixed to the lower end of the support column (27). A guide shell (36) is slidably installed on the outer surface of the guide frame (37), and the end of the guide shell (36) is fixed to the support column (27).

3. The welding device for the axle housing assembly of a heavy truck axle according to claim 1 is characterized in that: The welding part comprises a ring seat (20) coaxially arranged above the central top column (26), a shell seat (7) is fixedly installed on the upper end of the ring seat (20), a carrier seat (3) is slidably installed on the rear end of the shell seat (7), a bracket (2) is fixedly installed on the rear end of the carrier seat (3), the bracket (2) is fixedly installed on the welding table (1), a threaded rod (6) is rotatably installed between the upper and lower end surfaces of the inner part of the carrier seat (3), the shell seat (7) is screwed on the threaded rod (6), the upper end of the threaded rod (6) passes through the upper end of the carrier seat (3), and a second servo motor (5) is fixedly installed on the upper end of the carrier seat (3), and the output end of the second servo motor (5) is fixed to the threaded rod (6).

4. The welding device for the axle housing assembly of a heavy truck axle according to claim 3 is characterized in that: A propulsion ring (11) is coaxially rotatably mounted on the lower end of the ring seat (20), a gear ring (10) is coaxially inlaid on the outer surface of the propulsion ring (11), a gun rack (12) is fixedly mounted at the front end of the propulsion ring (11) near the lower side of the gear ring (10), a welding gun (14) is fixedly mounted at the end of the gun rack (12), a wheel rack (13) is fixedly mounted at the lower end of the gun rack (12), pressure ring wheels (16) are mounted at both ends of the wheel rack (13), and the gun head of the welding gun (14) corresponds to the center position between the two pressure ring wheels (16).

5. The welding device for the axle housing assembly of a heavy truck axle according to claim 4 is characterized in that: A servo motor No. 1 (4) is fixedly mounted at the center of the inner bottom surface of the housing seat (7); a gear shaft (21) is rotatably mounted through the inner bottom surface of the housing seat (7) near the front edge; a large pulley (18) is coaxially embedded in the upper end of the gear shaft (21); a small pulley (17) is coaxially embedded in the output end of the servo motor No. 1 (4); a transmission belt (19) is connected between the small pulley (17) and the large pulley (18); a pinion (9) is coaxially embedded in the lower end of the gear shaft (21); and the pinion (9) is meshed with a gear ring (10).

6. The welding device for the axle housing assembly of a heavy truck axle according to claim 5, characterized in that: A fixed column (22) is coaxially fixedly installed inside the ring seat (20), a pressure cap (31) is slidably installed on the upper part of the outer surface of the carrier column (27), a frame (33) is fixedly installed on the outer surface of the pressure cap (31), the middle part of the upper end of the frame (33) is fixed to the fixed column (22), and the carrier column (27) is coaxial with the fixed column (22).

7. A welding device for a bridge housing assembly of a heavy truck bridge according to claim 6, characterized in that: The upper end of the pressing cap (31) is fitted with a limiting cap (32), and the limiting cap (32) is embedded in the outer surface of the supporting column (27). The lower end of the pressing cap (31) is fixedly mounted with an adaptable spring (30), and the end of the adaptable spring (30) is fixed to the upper end of the pushing cap (29), and the supporting column (27) passes through the interior of the adaptable spring (30).

8. The welding device for the axle housing assembly of a heavy truck axle according to claim 7, characterized in that: The outer surface of the support column (27) is provided with a slide groove (8), and the inner surface of the push cap (29) and the inner surface of the pressure cap (31) are both extended with a slider (15), and the slider (15) is slidably installed inside the slide groove (8).

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