Axle welding tool

By designing axle welding tooling with multi-point positioning and flip functions, the problem of changing different toolings in the existing technology is solved, and unified positioning and welding of axles of different sizes is achieved, and production costs are reduced.

CN223129800UActive Publication Date: 2025-07-22DALIAN DASAIER METAL PROD CO LTD
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Patent Information

Application Number
CN202422122456.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-30
Publication Date
2025-07-22
Estimated Expiration
2034-08-30

AI Technical Summary

Technical Problem

The existing axle welding tooling requires the replacement of different welding tooling for axles of different sizes, which increases the production design cost.

Method used

An axle welding tool is designed, including a fixture body, an adjustment pallet, axle support part, a square shaft clamping part, a first arm support part and a second arm support part. Multi-point positioning and flipping of the axle is achieved through a cylinder-driven transmission system to meet the axle welding needs of different sizes.

Benefits of technology

The unified positioning and welding of axles of different sizes is achieved, which reduces the production design cost and simplifies the welding process of complex welds through the flip function.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN223129800U_ABST
    Figure CN223129800U_ABST
Patent Text Reader

Abstract

An axle welding tool is used for fixing an axle and comprises a clamp body, an adjusting supporting plate, an axle supporting part, a square shaft clamping part, a first supporting arm supporting part and a second supporting arm supporting part. The adjusting supporting plate is arranged at the lower end of the clamp body, the axle supporting part is arranged on the adjusting supporting plate and comprises a positioning sleeve, and a cylindrical groove allowing the lower end of an axle to be inserted therein is formed in the upper end of the positioning sleeve. The first supporting arm supporting part is arranged on the adjusting supporting plate; the second supporting arm supporting part is arranged on the clamp body and comprises a supporting arm supporting plate, the first end of the supporting arm supporting plate is connected with the clamp body, and the second end of the supporting arm supporting plate is located below the supporting arm; the square shaft clamping part is arranged on the clamp body and located above the second supporting arm supporting part and comprises a first clamping jaw and a second clamping jaw, a sliding groove is formed in the clamp body, the first clamping jaw is provided with a first sliding block matched with the sliding groove in the clamp body, and the second clamping jaw is provided with a second sliding block matched with the sliding groove in the clamp body.
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Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical design and relates to an axle welding tooling. Background Art

[0002] An axle is one of the important components of an automobile. During the welding process of the axle, it is necessary to clamp and position the axle. Currently, the clamping and positioning tooling is usually a single station, and different welding toolings need to be replaced for axles of different sizes, increasing the production design cost of the welding tooling. Content of the Utility Model

[0003] In view of this, the utility model discloses an axle welding tooling, and the specific scheme is as follows:

[0004] An axle welding tooling is used for welding an axle. The axle includes a square axle, a wheel axle, and a support arm. The axle welding tooling includes a fixture main body, an adjusting support plate, a wheel axle support part, a square axle clamping part, a first support arm support part, and a second support arm support part;

[0005] The adjusting support plate is arranged at the lower end of the fixture main body. The wheel axle support part is arranged on the adjusting support plate. The wheel axle support part includes a positioning sleeve, and a cylindrical groove for the lower end of the wheel axle to insert is arranged at the upper end of the positioning sleeve;

[0006] The first support arm support part is vertically arranged on the adjusting support plate; the second support arm support part is arranged on the fixture main body and includes a support arm support plate. The first end of the support arm support plate is connected to the fixture main body, and the second end of the support arm support plate is located below the support arm;

[0007] The square axle clamping part is arranged on the fixture main body and above the second support arm support part. It includes a first jaw and a second jaw. A chute is arranged on the fixture main body. A first slider cooperating with the chute on the fixture main body is arranged on the first jaw, and a second slider cooperating with the chute on the fixture main body is arranged on the second jaw. The sliders of the two groups of jaws are arranged in the chute of the fixture main body.

[0008] As a supplement to the technical solution of the utility model, the wheel axle support part further includes an adjusting sleeve and a positioning screw. The adjusting sleeve is a hollow cylindrical structure and is arranged on the adjusting support plate,

[0009] The lower part of the positioning sleeve is a cylindrical structure, and the lower part of the positioning sleeve is located inside the adjusting sleeve;

[0010] A threaded hole is arranged on the side wall of the adjusting sleeve, and the positioning screw is screwed into the threaded hole of the adjusting sleeve. The positioning screw passes through the side wall of the adjusting sleeve and its end abuts against the outer side wall of the positioning sleeve.

[0011] As a supplement to the technical solution of the utility model, the square axle clamping part further includes a first air cylinder and a transmission system;

[0012] The first cylinder is arranged at the rear side of the first jaw and the second jaw. The cylinder head of the first cylinder is arranged on the fixture body. A first joint is provided at the end of the piston rod of the first cylinder. A transmission system is provided between the first cylinder and the first jaw and the second jaw. The transmission system includes a first transmission arm, a second transmission arm, a third transmission arm, a fourth transmission arm, a first rotating arm, and a second rotating arm;

[0013] The first rotating arm is arranged on the fixture body through a rotating shaft. The first end of the first transmission arm is hinged to the first joint. The second end of the first transmission arm is hinged to the first end of the first rotating arm. The first end of the second transmission arm is hinged to the second end of the first rotating arm. The second end of the second transmission arm is hinged to the first slider;

[0014] The second rotating arm is arranged on the fixture body through a rotating shaft. The first end of the third transmission arm is hinged to the first joint. The second end of the third transmission arm is hinged to the first end of the second rotating arm. The first end of the fourth transmission arm is hinged to the second end of the second rotating arm. The second end of the fourth transmission arm is hinged to the second slider.

[0015] As a supplement to the technical solution of the present utility model, it further includes a rotating shaft. The rotating shaft is of a hollow columnar structure, and its front end is connected to the rear part of the fixture body.

[0016] As a supplement to the technical solution of the present utility model, the second arm support part further includes a second cylinder and a cylinder fixing block.

[0017] The cylinder fixing block is arranged on the fixture body and is located at the rear part of the fixture body. The end cover of the second cylinder is hinged to the cylinder fixing block. The arm support plate is arranged at the front part of the fixture body, and one end of the arm support plate is connected to the fixture body through a rotating shaft.

[0018] A through hole for the piston rod of the second cylinder to pass through is provided on the fixture body. The piston rod of the second cylinder passes through the through hole on the fixture body and is hinged to the middle part of the arm support plate.

[0019] As a supplement to the technical solution of the present utility model, the second cylinder is located inside the rotating shaft.

[0020] As a supplement to the technical solution of the present utility model, it further includes a first dust cover and a second dust cover. The first dust cover is arranged on the fixture body and is located above the arm support plate. The second dust cover is arranged on the fixture body and is located below the arm support plate.

[0021] As a supplement to the technical solution of the present utility model, an installation box body is provided on the upper part of the fixture main body. The installation box body is a hollow box body with an accommodation space inside. The sliding groove on the fixture main body is arranged on the front side wall of the hollow box body. The first clamping jaw and the second clamping jaw are both arranged at the front end of the installation box body. The transmission system is arranged inside the installation box body. The first air cylinder is arranged outside the installation box body. A through hole for the piston rod of the first air cylinder to pass through is provided on the rear side wall of the installation box body. The piston rod of the first air cylinder passes through the through hole on the installation box body and is connected to the transmission system located inside the installation box body.

[0022] As a supplement to the technical solution of the present utility model, the adjusting support plate includes a first support plate, a second support plate, and a bolt. The first support plate is fixedly connected to the fixture main body. The first end of the second support plate is connected to the first support plate through a bolt structure. The wheel shaft support part is arranged at the second end position of the second support plate.

[0023] Beneficial effects: Through the overall setting of the tooling, the positioning of the wheel shaft, axle, and support arm can be realized. At the same time, through the setting of the wheel shaft support part, the fixed limit function of wheel shafts at different heights can be realized. Through the setting of the square shaft clamping part, the technical effect of driving two groups of clamping jaws to clamp the square tube by only one air cylinder can be achieved. In another aspect of the present utility model, through the design of the rotary shaft and the second support arm support part, the whole device can be flipped in cooperation with the rotary motor, and at the same time, the support arm support plate can be retracted to leave space for the welding position. Description of the Drawings

[0024] Figure 1 It is a three-dimensional structure schematic diagram of the present utility model.

[0025] Figure 2 It is a schematic diagram of the axle structure.

[0026] Figure 3 It is a schematic diagram of the square shaft clamping part structure.

[0027] Figure 4 It is a schematic diagram of the second support arm support part structure.

[0028] Figure 5 It is a schematic diagram of the second support arm support part structure.

[0029] Figure 6 It is a three-dimensional structure schematic diagram of the present utility model.

[0030] Figure 7 It is a schematic diagram of the first dust cover and the second dust cover structure.

[0031] In the figure: 1. Square shaft, 2. Support arm, 3. Wheel shaft, 4. Fixture body, 5. Adjusting pallet, 6. Wheel shaft support part, 7. Square shaft clamping part, 8. First support arm support part, 9. Second support arm support part, 10. First jaw, 11. Second jaw, 12. Slide groove, 13. First slider, 14. Second slider, 15. Adjusting sleeve, 16. Positioning screw, 17. First cylinder, 18. First transmission arm, 19. Second transmission arm, 20. Third transmission arm, 21. Fourth transmission arm, 22. First rotating arm, 23. Second rotating arm, 24. Rotating shaft, 25. Second cylinder, 26. Cylinder fixing block, 27. First dust cover, 28. Second dust cover, 29. Installation box body, 30. First pallet, 31. Second pallet, 32. Support arm pallet, 33. First joint. Detailed implementation mode

[0032] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0034] As Figures 1 to 7 shown, an axle welding tooling is used for welding an axle. As Figure 2 shown, the axle includes three components: a square shaft 1, a support arm 2, and a wheel shaft 3. Openings are provided at both ends in the length direction of the support arm 2, namely a first opening and a second opening. During the assembly of the axle, the square shaft 1 is inserted into the first opening of the support arm 2, and the square shaft 1 and the support arm 2 are connected by welding. The wheel shaft is inserted into the second opening of the support arm 2, and the wheel shaft 3 and the support arm 2 are connected by welding. A total of four weld seams are provided:

[0035] The first weld seam is located at the upper position of the first opening and is used to connect the square shaft 1 and the support arm 2.

[0036] The second weld seam is located at the upper position of the second opening and is used to connect the axle 3 and the support arm 2.

[0037] The third weld seam is located at the lower position of the first opening and is used to connect the square shaft 1 and the support arm 2.

[0038] The fourth weld seam is located at the lower position of the second opening and is used to connect the axle 3 and the support arm 2.

[0039] The axle welding tooling specifically includes a fixture main body 4, an adjusting support plate 5, an axle support part 6, a square shaft clamping part 7, a first support arm support part 8, and a second support arm support part 9.

[0040] The adjusting support plate 5 is arranged at the lower end of the fixture main body 4, and the axle support part 6 is arranged on the adjusting support plate 5. The axle support part 6 includes a positioning sleeve, and a cylindrical groove for the lower end of the axle 3 to be inserted is provided at the upper end of the positioning sleeve to fixedly support the axle 3.

[0041] The first support arm support part 8 is vertically arranged on the adjusting support plate 5, and its upper end is used to support the adjusting support plate 5. Specifically, the first support arm support part 8 is a rod-shaped structure arranged vertically.

[0042] The second support arm support part 9 is arranged on the fixture main body 4 and includes a support arm support plate 32. The first end of the support arm support plate 32 is connected to the fixture main body 4, and the second end of the support arm support plate 32 is located below the support arm 2 and is used to support the support arm 2.

[0043] The square shaft clamping part 7 is arranged on the fixture main body 4 and above the second support arm support part 9. It includes a first jaw 10 and a second jaw 11. A chute 12 is formed on the fixture main body 4. A first slider 13 cooperating with the chute 12 on the fixture main body 4 is provided on the first jaw 10, and a second slider 14 cooperating with the chute 12 on the fixture main body 4 is provided on the second jaw 11. The sliders of the two groups of jaws are arranged in the chute 12 of the fixture main body 4, and the two groups of jaws slide on the fixture main body 4 through the sliders, so that the two groups of jaws can move towards each other to clamp the square shaft 1.

[0044] When using the axle welding tooling to fix the axle, first insert the lower end of the axle 3 into the cylindrical groove on the positioning sleeve of the axle support part 6, then place the support arm 2 on the first support arm support part 8 and the second support arm support part 9, so that the axle 3 passes through the second through hole on the support arm 2. Finally, insert the square shaft 1 into the first through hole of the support arm 2, and make its lower end rest on the support arm support plate 32 of the second support arm support part 9, and use the jaws of the square shaft clamping part 7 to clamp the square shaft 1 to complete the fixing process of the axle.

[0045] Since the lengths of the axles 3 vary, to adapt to the positioning of axles 3 with different lengths, as a preferred technical solution of the present utility model, the axle support portion 6 further includes an adjusting sleeve 15 and a positioning screw 16. The adjusting sleeve 15 is of a hollow cylindrical structure and is arranged on the adjusting support plate 5.

[0046] The lower part of the positioning sleeve is of a cylindrical structure, and the lower part of the positioning sleeve is located within the adjusting sleeve 15.

[0047] The side wall of the adjusting sleeve 15 is provided with a threaded hole, and the positioning screw 16 is screwed into the threaded hole of the adjusting sleeve 15. The positioning screw 16 passes through the side wall of the adjusting sleeve 15 so that its end abuts against the outer side wall of the positioning sleeve.

[0048] When it is necessary to adjust the relative position between the positioning sleeve and the adjusting sleeve 15, for example, when it is necessary to raise the height where the upper end of the positioning sleeve is located, the positioning screw 16 can be loosened, and then the positioning sleeve can be adjusted to a suitable height, and then the positioning screw 16 can be tightened to fix the positioning sleeve.

[0049] As a preferred technical solution of the present utility model, the square axle clamping portion 7 further includes a first cylinder 17 and a transmission system.

[0050] The first cylinder 17 is arranged at the rear side of the first clamping jaw 10 and the second clamping jaw 11. The cylinder head of the first cylinder 17 is arranged on the fixture main body 4, and the end of the piston rod of the first cylinder 17 is provided with a first joint 33.

[0051] A transmission system is provided between the first cylinder 17 and the first clamping jaw 10 and the second clamping jaw 11. The transmission system includes a first transmission arm 18, a second transmission arm 19, a third transmission arm 20, a fourth transmission arm 21, a first rotating arm 22, and a second rotating arm 23.

[0052] The first rotating arm 22 is arranged on the fixture main body 4 through a rotating shaft so that the first rotating arm 22 can rotate freely. The first end of the first transmission arm 18 is hinged to the first joint 33, and the second end of the first transmission arm 18 is hinged to the first end of the first rotating arm 22, so that the first rotating arm 22 can be driven to rotate by the first traditional arm during the extension or retraction of the cylinder piston rod. The first end of the second transmission arm 19 is hinged to the second end of the first rotating arm 22, and the second end of the second transmission arm 19 is hinged to the first slider 13. During the rotation of the first rotating arm 22, the first slider 13 can be pulled or pushed to slide within the sliding groove 12 on the fixture main body 4, driving the first clamping jaw 10 to move.

[0053] The second rotating arm 23 is arranged on the fixture body 4 through a rotating shaft, enabling the second rotating arm 23 to rotate freely. The first end of the third transmission arm 20 is hinged to the first joint 33, and the second end of the third transmission arm 20 is hinged to the first end of the second rotating arm 23, so that the second rotating arm 23 can be driven to rotate by the third transmission arm 20 during the extension or retraction of the cylinder piston rod. The first end of the fourth transmission arm 21 is hinged to the second end of the second rotating arm 23, and the second end of the fourth transmission arm 21 is hinged to the second slider 14. During the rotation of the second rotating arm 23, the second slider 14 can be pulled or pushed to slide in the chute 12 on the fixture body 4 through the fourth transmission arm 21, driving the movement of the second jaw 11.

[0054] In the above technical solution, when the piston rod of the cylinder extends, the first rotating arm 22 rotates clockwise, and the second rotating arm 23 rotates counterclockwise, increasing the distance between the first jaw 10 and the second jaw 11. When it is necessary to clamp the square shaft 1, the piston rod of the driving cylinder is retracted, causing the first rotating arm 22 to rotate counterclockwise and the second rotating arm 23 to rotate clockwise, making the two jaws move towards each other to clamp the square tube. Through the design of the above technical solution, the relative and opposite movements of the two jaws can be achieved by only one cylinder.

[0055] After the square shaft 1, the wheel shaft 3, and the support arm 2 are preliminarily fixed, the welding processes of the first and second welds are carried out. Since under this fixed condition, the third weld is located below the first opening, and the fourth weld is located below the second opening, welding at this position is relatively difficult. In view of this, as a preferred technical solution of the present utility model, it further includes a rotating shaft 24. The rotating shaft 24 is a hollow columnar structure, its front end is connected to the rear part of the fixture body 4, and the rear end of the rotating shaft 24 is connected to a rotating motor. Through the rotation of the rotating motor, the rotating shaft 24 drives the entire device to flip, so that the third weld and the fourth weld are located in the upper position, facilitating the overall welding.

[0056] When the entire tooling flips, the support arm tray 32 will interfere with the position of the third weld. In view of this, as a preferred technical solution of the present invention, the second support arm support portion 9 further includes a second cylinder 25 and a cylinder fixing block 26.

[0057] The cylinder fixing block 26 is arranged on the fixture body 4 and is located at the rear part of the fixture body 4. The end cover of the second cylinder 25 is hinged to the cylinder fixing block 26. The support arm tray 32 is arranged at the front part of the fixture body 4, and one end of the support arm tray 32 is connected to the fixture body 4 through a rotating shaft, enabling the support arm tray 32 to rotate.

[0058] The fixture body 4 is provided with a through hole for the piston rod of the second cylinder 25 to pass through. The piston rod of the second cylinder 25 passes through the through hole on the fixture body 4 and is hinged to the middle part of the support arm tray 32.

[0059] By driving the piston rod of the second cylinder 25 to extend and retract, the supporting arm tray 32 is driven to extend and retract. After the overall flipping of the device is completed, the piston rod of the second cylinder 25 is driven to retract, so that the supporting arm tray 32 rotates and retracts, facilitating the welding of the third weld seam.

[0060] As a supplement to the above technical solution, since a large amount of soot will appear during the welding process, the second cylinder 25 is located inside the rotating shaft 24, which can block the pollution of the second cylinder 25 by the soot.

[0061] As a supplement to the above technical solution, it further includes a first dust cover 27 and a second dust cover 28. The first dust cover 27 is arranged on the fixture body 4 and above the supporting arm tray 32, and the second dust cover 28 is arranged on the fixture body 4 and below the supporting arm tray 32. Through the arrangement of the first dust cover 27 and the second dust cover 28, the dust-proof effect of the hinged position between the second cylinder 25 and the supporting arm tray 32 and the connection position between the supporting arm tray 32 and the fixture body 4 is realized.

[0062] As a preferred technical solution of the present utility model, an installation box body 29 is provided on the upper part of the fixture body 4. The installation box body 29 is a hollow box body with an accommodation space inside. The chute 12 on the fixture body 4 is specifically arranged on the front side wall of the hollow box body. The clamping jaw is arranged at the front end of the installation box body 29. The transmission system is arranged inside the installation box body 29. The first cylinder 17 is arranged outside the installation box body 29. A through hole for the piston rod of the first cylinder 17 to pass through is provided on the rear side wall of the installation box body 29. The piston rod of the first cylinder 17 passes through the through hole on the installation box body 29 and is connected to the transmission system located inside the installation box body 29. Through the arrangement of the installation box body 29, the dust-proof effect of the traditional system is realized.

[0063] When welding different axles, there are cases where the structure of the square shaft 1 is different, so that the shape of the first opening changes accordingly. To achieve a stable connection between the supporting arm 2 and the square shaft 1, the length direction of the supporting arm 2 will be adjusted. To improve the versatility of this tooling, as a supplement to the technical solution of the present utility model, the adjusting tray 5 includes a first tray 30, a second tray 31, and a bolt. The first tray 30 is fixedly connected to the fixture body 4. The first end of the second tray 31 is connected to the first tray 30 through a bolt structure. The wheel axle support portion 6 is arranged at the second end position of the second tray 31.

[0064] By loosening the bolt, the second tray 31 can rotate to adjust the relative position of the wheel axle support portion 6.

[0065] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent replacements or changes should be covered within the protection scope of the present invention.

Claims

1. An axle welding tooling for welding an axle. The axle includes a square axle (1), a support arm (2), and a wheel axle (3), and is characterized in that The axle welding tooling includes a fixture main body (4), an adjusting support plate (5), a wheel axle support part (6), a square axle clamping part (7), a first arm support part (8), and a second arm support part (9); The adjusting support plate (5) is arranged at the lower end of the fixture main body (4), and the wheel axle support part (6) is arranged on the adjusting support plate (5). The wheel axle support part (6) includes a positioning sleeve, and a cylindrical groove for the lower end of the wheel axle (3) to be inserted is provided at the upper end of the positioning sleeve; The first arm support part (8) is vertically arranged on the adjusting support plate (5); the second arm support part (9) is arranged on the fixture main body (4), and it includes an arm support plate (32). The first end of the arm support plate (32) is connected to the fixture main body (4), and the second end of the arm support plate (32) is located below the arm (2); The square axle clamping part (7) is arranged on the fixture main body (4) and above the second arm support part (9). It includes a first clamping jaw (10) and a second clamping jaw (11). A chute (12) is formed on the fixture main body (4). A first sliding block (13) cooperating with the chute (12) on the fixture main body (4) is provided on the first clamping jaw (10), and a second sliding block (14) cooperating with the chute (12) on the fixture main body (4) is provided on the second clamping jaw (11). The sliding blocks of the two groups of clamping jaws are arranged in the chute (12) of the fixture main body (4).

2. The axle welding tooling according to claim 1, wherein, The wheel axle support part (6) further includes an adjusting sleeve (15) and a positioning screw (16). The adjusting sleeve (15) is of a hollow cylindrical structure and is arranged on the adjusting support plate (5), The lower part of the positioning sleeve is of a cylindrical structure, and the lower part of the positioning sleeve is located inside the adjusting sleeve (15); A threaded hole is provided on the side wall of the adjusting sleeve (15), and the positioning screw (16) is screwed into the threaded hole of the adjusting sleeve (15). The positioning screw (16) passes through the side wall of the adjusting sleeve (15) and its end abuts against the outer side wall of the positioning sleeve.

3. The axle welding tooling according to claim 1, characterized in that, The square axle clamping part (7) further includes a first air cylinder (17) and a transmission system; The first air cylinder (17) is arranged at the rear side of the first clamping jaw (10) and the second clamping jaw (11). The cylinder head of the first air cylinder (17) is arranged on the fixture main body (4). A first joint (33) is provided at the end of the piston rod of the first air cylinder (17). A transmission system is provided between the first air cylinder (17) and the first clamping jaw (10) and the second clamping jaw (11). The transmission system includes a first transmission arm (18), a second transmission arm (19), a third transmission arm (20), a fourth transmission arm (21), a first rotating arm (22), and a second rotating arm (23); The first rotating arm (22) is arranged on the fixture main body (4) through a rotating shaft. The first end of the first transmission arm (18) is hinged to the first joint (33), the second end of the first transmission arm (18) is hinged to the first end of the first rotating arm (22), the first end of the second transmission arm (19) is hinged to the second end of the first rotating arm (22), and the second end of the second transmission arm (19) is hinged to the first sliding block (13); The second rotating arm (23) is arranged on the fixture body (4) through a rotating shaft. The first end of the third transmission arm (20) is hinged to the first joint (33), the second end of the third transmission arm (20) is hinged to the first end of the second rotating arm (23), the first end of the fourth transmission arm (21) is hinged to the second end of the second rotating arm (23), and the second end of the fourth transmission arm (21) is hinged to the second slider (14).

4. The axle welding tooling according to claim 1, wherein, It further includes a rotating shaft (24). The rotating shaft (24) is of a hollow columnar structure, and its front end is connected to the rear part of the fixture body (4).

5. The axle welding tooling according to claim 4, characterized in that, The second arm support part (9) further includes a second cylinder (25) and a cylinder fixing block (26). The cylinder fixing block (26) is arranged on the fixture body (4) and located at the rear part of the fixture body (4). The end cover of the second cylinder (25) is hinged to the cylinder fixing block (26). The arm support plate (32) is arranged at the front part of the fixture body (4), and one end of the arm support plate (32) is connected to the fixture body (4) through a rotating shaft. The fixture body (4) is provided with a through hole for the piston rod of the second cylinder (25) to pass through. The piston rod of the second cylinder (25) passes through the through hole on the fixture body (4) and is hinged to the middle part of the arm support plate (32).

6. The axle welding tooling according to claim 5, characterized in that, The second cylinder (25) is located inside the rotating shaft (24).

7. The axle welding tooling according to claim 5, characterized in that, It further includes a first dust cover (27) and a second dust cover (28). The first dust cover (27) is arranged on the fixture body (4) and located above the arm support plate (32), and the second dust cover (28) is arranged on the fixture body (4) and located below the arm support plate (32).

8. The axle welding tooling according to claim 3, characterized in that, An installation box body (29) is arranged on the upper part of the fixture body (4). The installation box body (29) is a hollow box body with an accommodation space inside. The chute (12) on the fixture body (4) is arranged on the front side wall of the hollow box body. The first jaw (10) and the second jaw (11) are both arranged at the front end of the installation box body (29). The transmission system is arranged inside the installation box body (29). The first cylinder (17) is arranged outside the installation box body (29). The rear side wall of the installation box body (29) is provided with a through hole for the piston rod of the first cylinder (17) to pass through. The piston rod of the first cylinder (17) passes through the through hole on the installation box body (29) and is connected to the transmission system located inside the installation box body (29).

9. The axle welding tooling according to claim 1, characterized in that, The adjusting support plate (5) includes a first support plate (30), a second support plate (31), and a bolt. The first support plate (30) is fixedly connected to the fixture body (4). The first end of the second support plate (31) is connected to the first support plate (30) through a bolt structure. The wheel shaft support part (6) is arranged at the second end position of the second support plate (31).