Axle spindle attachment welding fixture

Abstract

The utility model relates to axle bridge rod welding technical field, concretely relates to axle bridge rod accessory welding frock, including operation platform, and operation platform is connected with two sets of bearing seat support positioning mechanism through sliding structure, and the operation platform of bearing seat support positioning mechanism both sides still is provided with head end fixed establishment and tail end fixed establishment, and head end fixed establishment is provided with power mechanism A for driving the sliding of similar bearing seat support positioning mechanism, and tail end fixed establishment drives the sliding of similar bearing seat support positioning mechanism through power mechanism A, head end fixed establishment, tail end fixed establishment all are provided with brake bottom plate fixed establishment, and operation platform still is provided with power mechanism B for driving head end fixed establishment and tail end fixed establishment each other close and far away, and one frock can complete the assembly of bearing seat support, brake bottom plate, improve work efficiency, avoid the cumulative error caused by multiple positioning at the same time, improve installation accuracy.

Description

Technical Field

[0001] This utility model relates to the field of vehicle axle welding technology, specifically to welding fixtures for vehicle axle rod accessories. Background Technology

[0002] The axle is a crucial component of a vehicle chassis, affecting its movement, braking, steering, and load-bearing capabilities. Based on their function, common axles can be broadly categorized into four types: steering axles, drive axles, steering-drive axles, and support axles. Support axles, as the name suggests, are axles that lack both steering and driving functions and are specifically designed to bear the weight of the vehicle body. As shown in Figure 6, existing support axles mainly consist of components such as axle beams (also called axle rods), brake backing plates, bearing housings, camshafts, wheel assemblies, and brake shoe assemblies.

[0003] Generally used on the chassis of semi-trailers behind tractors, support axles not only bear the weight of the vehicle body but also alleviate road bumps, ensure vehicle braking, and maintain vehicle movement. Although functionally the support axle is relatively simple among the four types of axles, its structure and composition are not simple at all. A single support axle has nearly a hundred parts, making it a truly precision machine. In particular, the installation precision of the brake backing plate and bearing housing bracket on the axle beam directly affects the camshaft installation. Insufficient installation precision here will cause deviations in the fit between the camshaft and the brake shoe assembly, affecting the braking effect.

[0004] When installing the existing brake base plate and bearing housing bracket, workers need to measure the installation position of the bridge rod, the relative positional relationship between the two, and the concentricity of the shaft holes on both sides multiple times. This is inefficient, and manual measurement has certain errors, so the accuracy during assembly cannot meet the requirements. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a welding fixture for axle rod accessories. The technical problems it solves are: low efficiency in welding and assembling axle rod accessories, and low yield rate of the accessory brake base plate and bearing seat bracket installation positions. The technical solution adopted by this utility model to solve the above-mentioned technical problems is: A welding fixture for axle rod accessories, characterized in that it includes: Control panel; The bearing housing support positioning mechanism and sliding structure are connected to the operating table via the sliding structure. The head end fixing mechanism is connected to the operating table and is equipped with a power mechanism A for driving the sliding of the positioning mechanism of the adjacent bearing seat bracket. The tail end fixing mechanism is connected to the operating table. The tail end fixing mechanism drives the adjacent bearing seat bracket positioning mechanism to slide through the power mechanism A. The brake base plate fixing mechanism is connected to the head end fixing mechanism and the tail end fixing mechanism respectively; Power mechanism B is used to drive the head-end fixing mechanism and the tail-end fixing mechanism to move closer and further apart.

[0006] Furthermore, the operating platform is equipped with a support frame and a telescopic power component A for driving the support frame to move up and down. The support frame is connected to a guide rod, which is slidably connected to the operating platform.

[0007] Furthermore, the upper end face of the support frame is provided with an L-shaped groove with an inclined structure, and two opposite side walls of the L-shaped groove are provided with rotating rollers, the edges of which protrude from the side walls of the L-shaped groove.

[0008] Furthermore, both the head-end fixing mechanism and the tail-end fixing mechanism are connected to the operating table via a sliding mechanism; The power mechanism B includes two parallel racks, a first rack and a second rack, a gear between the first rack and the second rack, the gear meshing with the first rack and the second rack, and a power component for driving the first rack or the second rack to move. The head-end fixing mechanism is connected to the first rack, and the tail-end fixing mechanism is connected to the second rack.

[0009] Furthermore, both the head-end fixing mechanism and the tail-end fixing mechanism include sliding seats, and positioning sleeves are respectively provided on opposite sides of the two sliding seats in a rotatable manner. The inner opening of the positioning sleeve is provided with a chamfer structure that matches the shoulder of the bridge rod.

[0010] Furthermore, a rotating power component B, a frame, and a mounting plate are provided on the side of the sliding seat near the positioning sleeve. The sliding seat is connected to the rotating power component B by rotation. The rotating power component B is fixedly connected to the mounting plate through the frame. The mounting plate is connected to the positioning sleeve by a fixed structure. Rotary power component B is a rotary drive at the head end fixing mechanism and a rotary bearing at the tail end fixing mechanism; The brake base plate fixing mechanism is connected to the mounting plate by a fixed structure.

[0011] Furthermore, the brake base plate fixing mechanism includes a telescopic power component B, a mounting sleeve, and a pull rod. The output shaft of the telescopic power component B is connected to one end of the pull rod, and the other end of the pull rod passes through the mounting sleeve and is equipped with a locking block via an insert plate.

[0012] Furthermore, the power mechanism A includes a rotating power component A connected to the head end fixing mechanism and the tail end fixing mechanism. The output shaft of the rotating power component A is fixedly connected to a screw, and the screw is connected to the sliding structure by a thread.

[0013] Furthermore, the sliding structure includes a support leg that is slidably connected along the X direction of the operating table, and the support leg is connected to the screw by a threaded connection; The bearing housing bracket positioning mechanism is slidably connected to the support leg along the Y direction. The bearing housing bracket positioning mechanism includes a mounting base, a chuck is provided on one side of the inner end of the mounting base, and a rotary pressing cylinder is provided on the mounting base on one side of the chuck. The outrigger is equipped with a telescopic power component C that drives the mounting base to slide along the Y direction.

[0014] Furthermore, a T-shaped bracket is fixedly installed on the output shaft of the rotary downward pressure cylinder.

[0015] The beneficial effects of this utility model are as follows: by setting the head end fixing mechanism and the tail end fixing mechanism to fix the bridge rod, and then using the bearing seat bracket positioning mechanism to fix and position the bearing seat bracket, and the brake base plate fixing mechanism to fix and position the brake base plate, one tooling can complete the assembly, which improves work efficiency, avoids the cumulative error caused by multiple positioning, and improves installation accuracy.

[0016] Furthermore, the head-end fixing mechanism, the tail-end fixing mechanism, and the adjacent bearing seat bracket positioning mechanism are all linked through the power mechanism A. A single adjustment can complete the installation of the brake base plate and bearing seat bracket of the same model support bridge, ensuring the stability of the relative positional relationship between the two, improving work efficiency and yield. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the structure of this utility model viewed from below.

[0019] Figure 3 This is an exploded structural diagram of the head-end fixing mechanism or tail-end fixing mechanism of this utility model.

[0020] Figure 4 This is a schematic diagram of the support frame structure of this utility model.

[0021] Figure 5 This is an enlarged schematic diagram of the sliding structure and braking base plate fixing mechanism of this utility model.

[0022] Figure 6 This is a schematic diagram of the completed installation structure of the axle and bridge rod accessories of this utility model.

[0023] Figure 7 This is a schematic diagram of an embodiment of the present invention.

[0024] In the picture: 1. Operating table; 2. Support frame; 3. Bearing seat bracket positioning mechanism; 31. Mounting base; 32. Chuck; 33. Rotary pressing cylinder; 34. T-shaped frame; 4. Sliding structure; 41. Outrigger; 42. Telescopic power component C; 5. Head end fixing mechanism; 51. Sliding seat; 52. Positioning sleeve; 53. Chamfering structure; 54. Rotary power component B; 55. Frame; 56. Mounting plate; 6. Power mechanism A; 61. Rotary power component A; 62. Screw; 7. Tail end fixing mechanism. 8. Brake base plate fixing mechanism; 81. Telescopic power component B; 82. Mounting sleeve; 83. Tie rod; 84. Locking block; 9. Power mechanism B; 91. First rack; 92. Second rack; 93. Gear; 10. Telescopic power component A; 11. Guide rod; 12. L-shaped bracket; 13. Rotary roller; 14. Power component; 15. Telescopic power component D; 16. Fixed leg; 17. Top rod; 18. Bridge rod; 19. Brake base plate; 20. Camshaft; 21. Bearing seat bracket. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the utility model will now be described in further detail with reference to the accompanying drawings and the following embodiments, so that the public can better understand the implementation method of this utility model. The specific implementation scheme of this utility model is as follows: A welding fixture for axle rod accessories is characterized by comprising an operating platform 1. The operating platform 1 is connected to two sets of bearing seat bracket positioning mechanisms 3 via a sliding structure 4. The operating platform 1 on both sides of the bearing seat bracket positioning mechanism 3 is also provided with a head end fixing mechanism 5 and a tail end fixing mechanism 7. The head end fixing mechanism 5 is provided with a power mechanism A6 for driving the adjacent bearing seat bracket positioning mechanism 3 to slide. The tail end fixing mechanism 7 drives the adjacent bearing seat bracket positioning mechanism 3 to slide via the power mechanism A6. Both the head end fixing mechanism 5 and the tail end fixing mechanism 7 are provided with a brake base plate fixing mechanism 8. The operating platform 1 is also provided with a power mechanism B9 for driving the head end fixing mechanism 5 and the tail end fixing mechanism 7 to move closer and further apart from each other. By setting the head end fixing mechanism 5 and the tail end fixing mechanism 7 to fix the bridge rod 18, and then using the bearing seat bracket positioning mechanism 3 to fix and position the bearing seat bracket 21, and the brake base plate fixing mechanism 8 to fix and position the brake base plate 21, one tooling can complete the assembly of the bearing seat bracket 21 and the brake base plate 21, which improves work efficiency, avoids the cumulative error caused by multiple positioning, and improves installation accuracy.

[0026] Specifically, the power mechanism B9 includes two parallel racks 91 and 92, with a gear 93 positioned between them. The gear 93 meshes with the racks 91 and 92 and is connected to the operating table 1 by rotation. A power component 14 is also provided to drive the racks 91 or 92 to move. A head-end fixing mechanism 5 is connected to the rack 91, and a tail-end fixing mechanism 7 is connected to the rack 92. To ensure structural stability, the racks 91 and 92 are connected to the operating table 1 via linear guide rails.

[0027] It should be noted that, in order to ensure the accuracy of the relative position of the brake base plate 19 and the bearing housing bracket 21 on the bridge rod 18, that is, to ensure the accuracy of the installation of the components at both ends of the support bridge, the head end fixing mechanism 5 and the tail end fixing mechanism 7 are symmetrically arranged on both sides of the gear 93. This structural design can place the allowable machining and installation errors between the two adjacent bearing housing brackets 21, thereby improving the installation accuracy of the camshaft 20 and the brake shoe assembly.

[0028] In one embodiment, the power component 14 can be a motor or a rotary motor. The motor or rotary motor is fixedly connected to the operating table 1. The output shaft of the motor or the output shaft of the rotary motor is connected to the gear 93 by a key. The motor or rotary motor drives the gear 93 to rotate, and the meshing of the gear 93 drives the first rack 91 and the second rack 92 to move.

[0029] In another embodiment, the power component 14 may be a hydraulic cylinder, which is connected to the operating table 1. The output shaft of the hydraulic cylinder is connected to the first rack 91 or the second rack 92, so as to drive the gear 93 to rotate through one of the racks, and then drive the gear 93 to move through the meshing of the other rack, thereby driving the head end fixing mechanism 5 and the tail end fixing mechanism 7 to move in the X direction.

[0030] It should be noted that both the head-end fixing mechanism 5 and the tail-end fixing mechanism 7 are connected to the operating table 1 by sliding, and the sliding method can be achieved by using linear guide rails.

[0031] Specifically, both the head-end fixing mechanism 5 and the tail-end fixing mechanism 7 include a sliding seat 51. On opposite sides of the two sliding seats 51, a positioning sleeve 52 is rotatably provided. The inner opening of the positioning sleeve 52 is provided with a chamfer structure 53 that matches the shoulder of the bridge rod. The chamfer structure 53 can increase the contact area with the shoulder, reduce damage to the shoulder, and improve concentricity. The power mechanism B9 drives the head-end fixing mechanism 5 and the tail-end fixing mechanism 7 to move inward, extending both ends of the bridge rod 18 into the positioning sleeve 52 until the chamfer structure 53 clamps and engages with the shoulder of the bridge rod 18, thus completing the fixing of the bridge rod 18.

[0032] It should be noted that the sliding seat 51 is provided with a rotating power component B54, a frame 55, and a mounting plate 56 on the side near the positioning sleeve 52. The sliding seat 51 and the rotating power component B54 are connected by rotation. The rotating power component B54 is fixedly connected to the mounting plate 56 through the frame 55. The mounting plate 56 is connected to the positioning sleeve 52 by a fixed structure. The rotating power component B54 is a rotary drive at the head fixing mechanism 5 and a rotary bearing at the tail fixing mechanism 7, ensuring that the bridge rod 18, which is restricted to the head fixing mechanism 5 and the tail fixing mechanism 7, can rotate around its own axis, thereby facilitating the full welding work requirements of the accessories.

[0033] Three brake base plate fixing mechanisms 8 are connected to the mounting plate 56 in a fixed structure. The brake base plate fixing mechanism 8 includes a telescopic power component B81, a mounting sleeve 82, and a pull rod 83. The output shaft of the telescopic power component B81 is connected to one end of the pull rod 83. The other end of the pull rod 83 passes through the mounting sleeve 82 and is equipped with a locking block 84 through an insert plate, which facilitates quick clamping and fixing of the brake base plate, improving efficiency and installation accuracy. The telescopic power component B81 is a cylinder or a hydraulic cylinder.

[0034] It should be noted that the power mechanism A6 includes a rotating power component A61 connected to the head-end fixing mechanism 5 and the tail-end fixing mechanism 7. The rotating power component A61 can be an electric motor or a rotary motor. The output shaft of the rotating power component A61 is fixedly connected to a screw 62. The screw 62 is connected to the sliding structure 4 by a thread. By adjusting the distance between the bearing seat bracket positioning mechanism 3 and the positioning sleeve 52 through the power mechanism A6, the installation of the brake base plate and bearing seat bracket of the same model of support bridge can be completed in one adjustment, ensuring the stability of the relative positional relationship between the two, improving work efficiency and yield rate; it can also meet the welding and processing requirements of accessories of support bridges of different models and sizes, improving practicality.

[0035] Specifically, the sliding structure 4 includes a support leg 41 that is slidably connected along the X direction of the operating table 1. The support leg 41 is connected to the operating table 1 via a linear guide rail to achieve the purpose of movement. The support leg 41 is connected to the screw 62 via a threaded connection to provide power for the movement of the support leg 41.

[0036] The bearing housing bracket positioning mechanism 3 is slidably connected to the support leg 41 along the Y direction. The support leg 41 is connected to the bearing housing bracket positioning mechanism 3 via a linear guide rail. The bearing housing bracket positioning mechanism 3 includes a mounting base 31. A chuck 32 is detachably provided on one side of the inner end of the mounting base 31. The shaft hole of the bearing housing bracket 21 is fitted onto the outside of the chuck 32. Then, the rotating pressing cylinder 33 provided on the mounting base 31 on one side of the chuck 32 is used to restrict the bearing housing bracket 21 on the mounting base 31, thus completing the fixation of the bearing housing bracket 21. The support leg 41 is provided with a telescopic power component C42 that drives the mounting base 31 to slide along the Y direction. The telescopic power component C42 can be a hydraulic cylinder or a pneumatic cylinder, which can push the bearing housing bracket 21 fixed on the mounting base 31 to move inward until the bearing housing bracket 21 is in contact with the side wall of the bridge rod 18.

[0037] Furthermore, a T-shaped bracket 34 is fixedly installed on the output shaft of the rotary pressing cylinder 33 to increase the pressing area and improve the fixing effect.

[0038] In the above embodiments, the bridge pole 18 needs to be hoisted to the upper part of the operating platform using tools such as overhead cranes, and then the bridge pole 18 is lowered to the same height as the positioning sleeve 52. Workers hold the bridge pole 18 by hand to complete the docking with the positioning sleeve 52, which easily leads to technical problems of difficulty in alignment. In order to solve the above problems, this embodiment provides a support frame 2 and a telescopic power component A10 for driving the support frame 2 to move up and down. The telescopic power component A10 is a cylinder or hydraulic cylinder. There are two support frames 2. The support frames 2 are connected to guide rods 11. The guide rods 11 are slidably connected to the operating platform 1. The beneficial effects achieved are: it can meet the support of bridge poles of different models and sizes and improve the stability of docking with the positioning sleeve 52.

[0039] It should be noted that the upper end face of the support frame 2 is provided with an L-shaped groove 12 with an inclined structure, which can prevent the bridge rod 18 from tipping over. The two opposite side walls of the L-shaped groove 12 are provided with rotating rollers 13 by means of rotation. The edge of the rotating rollers 13 protrudes from the side wall of the L-shaped groove 12, reducing the friction of the bridge rod 18 moving in the X direction. It should be noted that after the bridge rod 18 is placed on the rotating rollers 13, the bridge rod 18 can pass through the center of the positioning sleeve 52 when it moves vertically, so as to meet the centering requirements.

[0040] In the above embodiments, in order to reduce the installation error of the accessories in the axial direction of the bridge rod 18, the power mechanism B is used to clamp both ends of the bridge rod 18 through the positioning sleeves 52 of the head end fixing mechanism 5 and the tail end fixing mechanism 7. Due to the large clamping force and the reasonable machining error of the shoulders on both sides of the bridge rod 18, when the head end fixing mechanism 5 and the tail end fixing mechanism 7 move outward after machining, it is easy to cause one end of the bridge rod 18 to not separate from one of the positioning sleeves 52, requiring workers to knock and pull to separate them. In order to solve the above technical problems, this embodiment... A fixed leg 16 is fixedly installed on the sliding seat 51. The fixed leg 16 is fixedly equipped with a telescopic power component D15, which is a hydraulic cylinder or a pneumatic cylinder. The output shaft of the hydraulic cylinder or pneumatic cylinder is fixedly connected to a push rod 17. The push rod 17 passes through the sliding seat 51 and the telescopic power component C54 and extends into the frame 55. After processing, the telescopic power component D15 drives the push rod 17 to abut against the top end face of the bridge rod 18, applying an outward pushing force to the bridge rod 18, so as to disengage it from the positioning sleeve 52, thereby achieving the goal of quickly separating from the positioning sleeve and reducing the labor intensity of workers.

[0041] The working principle and process of this utility model are as follows: First, adjust the distance between the sliding structure and the head-end fixing mechanism 5 and the tail-end fixing mechanism 7 according to the requirements of the corresponding model of the support bridge assembly.

[0042] The bridge rod 18 is lifted onto the L-shaped bracket 12 using a gantry crane. Then, the hydraulic cylinder 10 is activated, and the hydraulic cylinder 10 pushes the bridge rod upward through the L-shaped bracket 12 until the central axis of the bridge rod 18 coincides with the central axis of the positioning sleeve 52.

[0043] Then, the hydraulic cylinder 14 is activated, which drives the first rack 91 to move. The first rack 91 then drives the gear 93 to rotate through meshing. The gear 93 meshes with the second rack 92, which in turn drives it to move. This drives the head end fixing mechanism 5 and the tail end fixing mechanism 7 to move in the X direction toward the bridge rod 18. Both ends of the bridge rod 18 extend into the positioning sleeve 52 and enter the frame 55 until the chamfered structure 53 is pressed tightly against the shoulder of the bridge rod 18.

[0044] The three shaft holes of the brake base plate 19 are respectively fitted onto the outside of the corresponding mounting sleeve 82. Then, the locking block 84 is inserted into the slot of the pull rod 83. The hydraulic cylinder 81 is activated, and the hydraulic cylinder 81 pulls the locking block 84 through the pull rod 83, thereby pressing the brake base plate 19 onto the surface of the mounting sleeve 82 to complete the fixed positioning work.

[0045] The bearing housing bracket 21 is fitted with the shaft hole outside the chuck 32, and then the T-shaped frame is driven by the rotary pressing cylinder 33 to restrict the bearing housing bracket 21 on the mounting base 31, thus completing the fixation of the bearing housing bracket 21. The hydraulic cylinder 42 is started to push the bearing housing bracket 21 fixed on the mounting base 31 to move inward until the bearing housing bracket 21 is in contact with the side wall of the bridge rod 18.

[0046] After spot welding is completed, the support frame 2 is lowered, and the rotary drive 54 is started to rotate and perform full welding on the brake base plate 19 and bearing seat bracket 21.

[0047] After welding is completed, the support frame 2 is raised to support the bridge rod 18, the locking block 84 is removed, and the power mechanism B9 is activated to drive the head end fixing mechanism 5 and the tail end fixing mechanism 7 to move outward. If the bridge rod 18 is not disengaged from the positioning sleeve 52, the hydraulic cylinder 15 is activated. The hydraulic cylinder 15 drives the push rod 17 to abut against the top end face of the bridge rod 18, applying an outward pushing force to the bridge rod 18, so that it disengages from the positioning sleeve 52, thus completing the operation.

[0048] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "front," "rear," "lower left," "upper right," "outer," "clockwise," and "counterclockwise," 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, and 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 on the scope of protection of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Although this utility model has been described according to a limited number of embodiments, those skilled in the art should understand from the above description that other embodiments can be conceived within the scope of this utility model described herein.

Claims

1. A welding fixture for axle and bridge rod accessories, characterized in that, include: Control panel (1); The bearing seat bracket positioning mechanism (3) and the sliding structure (4) are connected to the operating table (1) respectively through the sliding structure (4). The head end fixing mechanism (5) is connected to the operating table (1). The head end fixing mechanism (5) is equipped with a power mechanism A (6) for driving the sliding of the adjacent bearing seat bracket positioning mechanism (3). Tail end fixing mechanism (7) is connected to the operating table (1). The tail end fixing mechanism (7) drives the adjacent bearing seat bracket positioning mechanism (3) to slide through the power mechanism A (6). Brake base plate fixing mechanism (8) is connected to head end fixing mechanism (5) and tail end fixing mechanism (7) respectively; Power mechanism B (9) is used to drive the head-end fixing mechanism (5) and the tail-end fixing mechanism (7) to move closer and further apart.

2. The welding fixture for axle rod accessories according to claim 1, characterized in that: The operating table (1) is provided with a support frame (2) and a telescopic power component A (10) for driving the support frame (2) to move up and down. The support frame (2) is connected with a guide rod (11), which is slidably connected to the operating table (1).

3. The welding fixture for axle rod accessories according to claim 2, characterized in that: The upper surface of the support frame (2) is provided with an L-shaped groove (12) with an inclined structure. The two opposite side walls of the L-shaped groove (12) are provided with rotating rollers (13) by rotation. The edge of the rotating rollers (13) protrudes from the side wall of the L-shaped groove (12).

4. The welding fixture for axle rod accessories according to claim 1, characterized in that: Both the head-end fixing mechanism (5) and the tail-end fixing mechanism (7) are connected to the operating table (1) by sliding. The power mechanism B (9) includes two parallel racks (91) and a second rack (92), a gear (93) is provided between the first rack (91) and the second rack (92), the gear (93) meshes with the first rack (91) and the second rack (92), and a power component (14) is also provided for driving the first rack (91) or the second rack (92) to move. The head-end fixing mechanism (5) is connected to the first rack (91), and the tail-end fixing mechanism (7) is connected to the second rack (92).

5. The welding fixture for axle rod accessories according to claim 4, characterized in that: Both the head-end fixing mechanism (5) and the tail-end fixing mechanism (7) include a sliding seat (51). The two sliding seats (51) are respectively provided with a positioning sleeve (52) on their opposite sides in a rotating manner. The inner opening of the positioning sleeve (52) is provided with a chamfer structure (53) that matches the shoulder of the bridge rod.

6. The welding fixture for axle rod accessories according to claim 5, characterized in that: The sliding seat (51) is provided with a rotating power component B (54), a frame (55) and a mounting plate (56) on the side near the positioning sleeve (52). The sliding seat (51) and the rotating power component B (54) are connected by rotation. The rotating power component B (54) is fixedly connected to the mounting plate (56) through the frame (55). The mounting plate (56) and the positioning sleeve (52) are connected by a fixed structure. The rotating power component B (54) is a rotary drive at the head end fixing mechanism (5), and the rotating power component B (54) is a rotary bearing at the tail end fixing mechanism (7); The brake base plate fixing mechanism (8) is connected to the mounting plate (56) in a fixed structure manner.

7. The welding fixture for axle rod accessories according to claim 6, characterized in that: The brake base plate fixing mechanism (8) includes a telescopic power component B (81), a mounting sleeve (82), and a pull rod (83). The output shaft of the telescopic power component B (81) is connected to one end of the pull rod (83), and the other end of the pull rod (83) passes through the mounting sleeve (82) and is equipped with a locking block (84) by means of a insert plate.

8. The welding fixture for axle rod accessories according to claim 1 or 5, characterized in that: The power mechanism A (6) includes a rotating power component A (61) connected to the head end fixing mechanism (5) and the tail end fixing mechanism (7). The output shaft of the rotating power component A (61) is connected to a screw (62) in a fixed manner. The screw (62) is connected to the sliding structure (4) in a threaded manner.

9. The welding fixture for axle rod accessories according to claim 8, characterized in that: The sliding structure (4) includes a support leg (41) that is slidably connected along the X direction of the operating table (1), and the support leg (41) is connected to the screw (62) by a thread. The bearing housing bracket positioning mechanism (3) is connected to the support leg (41) in a sliding manner along the Y direction. The bearing housing bracket positioning mechanism (3) includes a mounting base (31). A chuck (32) is provided on one side of the inner end of the mounting base (31). A rotary pressing cylinder (33) is provided on the mounting base (31) on one side of the chuck (32). The outrigger (41) is provided with a telescopic power component C (42) that drives the mounting base (31) to slide along the Y direction.

10. The welding fixture for axle rod accessories according to claim 9, characterized in that: The output shaft of the rotary pressing cylinder (33) is fixedly equipped with a T-shaped bracket (34).

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