Axle rod accessory welding tool

Abstract

The invention relates to the technical field of axle welding, in particular to an axle rod accessory welding tool which comprises an operation table, the operation table is connected with two sets of bearing seat support positioning mechanisms through sliding structures, and the positions, on the two sides of the bearing seat support positioning mechanisms, of the operation table are further provided with a head end fixing mechanism and a tail end fixing mechanism. The head end fixing mechanism is provided with a power mechanism A used for driving the adjacent bearing seat support positioning mechanisms to slide, and the tail end fixing mechanism drives the adjacent bearing seat support positioning mechanisms to slide through the power mechanism A. The head end fixing mechanism and the tail end fixing mechanism are each provided with a brake bottom plate fixing mechanism, the operation table is further provided with a power mechanism B used for driving the head end fixing mechanism and the tail end fixing mechanism to be close to or far away from each other, one tool can complete assembling of the bearing seat support and the brake bottom plate, the work efficiency is improved, and meanwhile the work efficiency is improved. Accumulated errors caused by multiple times of positioning are avoided, and the installation precision is improved.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle axle welding, and in particular to a welding tool for vehicle axle rod accessories. Background Art

[0002] The axle is a crucial component of the vehicle chassis, crucial for its movement, braking, steering, and load-bearing capabilities. Based on their function, common axles can be categorized into four types: steering axles, drive axles, steering-drive axles, and support axles. As the name suggests, a support axle is an axle designed to bear the weight of the vehicle body, lacking either steering or drive functions. As shown in Figure 6, existing support axles primarily consist of axle beams (also called axle rods), brake base plates, bearing support brackets, camshafts, wheel assemblies, and brake shoe assemblies.

[0003] Typically used on the chassis of a semi-trailer behind a tractor, in addition to carrying the vehicle's weight, it also mitigates road bumps, ensures braking, and maintains vehicle travel. While functionally the simplest of the four axle types, the support axle itself is not. A single support axle alone comprises nearly 100 components, making it a truly precision machine. The mounting accuracy of the brake base plate and bearing support bracket on the axle beam has a direct impact on camshaft installation. Inadequate mounting accuracy can lead to misalignment between the camshaft and brake shoe assembly, compromising braking performance.

[0004] When installing the existing brake base plate and bearing seat bracket, workers are required to measure the installation position of the bridge pole, the relative position relationship between the two, and the concentricity of the shaft holes on both sides multiple times. Firstly, the efficiency is low, and secondly, there are certain errors in manual measurement, and the accuracy during assembly cannot meet the requirements. Summary of the Invention

[0005] To solve the above technical problems, the present invention provides a welding tool for axle rod accessories, which solves the technical problems of low efficiency in welding and assembling axle rod accessories and low yield rate in the installation position of accessory brake base plates and bearing seat brackets. To solve the above technical problems, the technical solutions adopted by the present invention are: The axle rod accessory welding tool is characterized by comprising: operating table; Bearing seat bracket positioning mechanism, sliding structure, two sets of bearing seat bracket positioning mechanisms are connected to the operating table through sliding structures respectively; The head end fixing mechanism is connected to the operating table and is provided 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, and the tail end fixing mechanism drives the adjacent bearing seat bracket positioning mechanism to slide through the power mechanism A; A brake base plate fixing mechanism, the brake base plate fixing mechanism is connected to the head end fixing mechanism and the tail end fixing mechanism respectively; A power mechanism B is used to drive the head end fixing mechanism and the tail end fixing mechanism to move closer to and away from each other.

[0006] Furthermore, the operating table is provided with a support frame and a telescopic power member A for driving the support frame to move up and down. The support frame is connected to a guide rod, and the guide rod is connected to the operating table in a sliding manner.

[0007] Furthermore, an L-shaped bracket with an inclined structure is provided on the upper end surface of the support frame, and rollers are provided on two opposite side walls of the L-shaped bracket in a rotatable manner, and the edges of the rollers protrude from the side walls of the L-shaped bracket.

[0008] Furthermore, the head end fixing mechanism and the tail end fixing mechanism are both connected to the operating table in a sliding manner; The power mechanism B includes a first rack and a second rack arranged in parallel, a gear is provided between the first rack and the second rack, the gear is meshed with the first rack and the second rack, and a power member is also provided 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, the head end fixing mechanism and the tail end fixing mechanism both include sliding seats, and positioning sleeves are rotatably provided on opposite sides of the two sliding seats, and chamfered structures matching the bridge rod shoulders are provided at the inner openings of the positioning sleeves.

[0010] Furthermore, a rotating power member, a frame and a mounting plate are provided on the side of the sliding seat close to the positioning sleeve. The sliding seat is connected to the rotating power member by a rotational manner, the rotating power member is fixedly connected to the mounting plate through the frame, and the mounting plate is connected to the positioning sleeve by a fixed structure. The brake base plate fixing mechanism is connected to the mounting plate in a fixed structural manner.

[0011] Furthermore, the brake base plate fixing mechanism includes a telescopic power part B, a mounting sleeve, and a pull rod. The output shaft of the telescopic power part 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 provided with a clamping block by means of a plug-in plate.

[0012] Furthermore, the power mechanism A includes a rotating power member connected to the head end fixing mechanism and the tail end fixing mechanism. The output shaft of the rotating power member is connected to a screw in a fixed manner, and the screw is connected to the sliding structure by a threaded manner.

[0013] Furthermore, the sliding structure includes a support leg connected to the operating table in a sliding manner in the X direction, and the support leg is connected to the screw rod by a threaded manner; The bearing seat bracket positioning mechanism is connected to the support leg in a sliding manner along the Y direction. The bearing seat bracket positioning mechanism includes a mounting seat, a chuck is provided on one side of the inner end of the mounting seat, and a rotating downward pressure cylinder is provided on the mounting seat on one side of the chuck; The supporting leg is provided with a telescopic power part C which drives the mounting seat to slide along the Y direction.

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

[0015] The beneficial effects of the present invention are as follows: by setting a head-end fixing mechanism and a 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 tool can complete the assembly, thereby improving work efficiency, avoiding the cumulative errors caused by multiple positioning, and improving installation accuracy.

[0016] Moreover, 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. Only one adjustment is required to complete the installation of the brake base plate and bearing seat bracket of the same model support bridge, thereby ensuring the stability of the relative position relationship between the two and improving work efficiency and yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the structure of the present invention when viewed from above.

[0019] Figure 3 It is a schematic diagram of the exploded structure of the head end fixing mechanism or the tail end fixing mechanism of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the support frame of the present invention.

[0021] Figure 5 It is an enlarged structural diagram of the sliding structure and the brake base plate fixing mechanism of the present invention.

[0022] Figure 6 It is a structural schematic diagram of the axle rod part accessories of the present invention after installation.

[0023] Figure 7 It is a schematic structural 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 seat, 32. Chuck, 33. Rotating downward pressure cylinder, 34. T-shaped frame, 4. Sliding structure, 41. Support legs, 42. Telescopic power component C, 5. Head end fixing mechanism, 51. Sliding seat, 52. Positioning sleeve, 53. Chamfering structure, 54. Rotating power component, 55. Frame, 56. Mounting plate, 6. Power mechanism A, 61. Rotating power component, 62. Screw, 7. Tail end fixing mechanism , 8. Brake base plate fixing mechanism, 81. Telescopic power part B, 82. Mounting sleeve, 83. Pull rod, 84. Block, 9. Power mechanism B, 91. First rack, 92. Second rack, 93. Gear, 10. Telescopic power part A, 11. Guide rod, 12. L-shaped bracket, 13. Roller, 14. Power part, 15. Telescopic power part D, 16. Fixed leg, 17. Push rod, 18. Bridge rod, 19. Brake base plate, 20. Camshaft, 21. Bearing seat bracket. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will now be further described in detail with reference to the accompanying drawings and the following examples so that the public can better understand the implementation method of the present invention. The specific implementation scheme of the present invention is as follows: The axle bridge rod accessory welding tool is characterized in that it includes an operating platform 1, which is connected to two sets of bearing seat bracket positioning mechanisms 3 through 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, and the tail end fixing mechanism 7 drives the adjacent bearing seat bracket positioning mechanism 3 to slide through the power mechanism A6; the head end fixing mechanism 5 and the tail end fixing mechanism 7 are both provided with a brake base plate fixing mechanism 8, and 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 to and away from each other. By setting up 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 tool can complete the assembly of the bearing seat bracket 21 and the brake base plate 21, while improving work efficiency, avoiding the cumulative errors caused by multiple positioning, and improving installation accuracy.

[0026] Specifically, the power mechanism B9 includes two parallel first racks 91 and second racks 92, a gear 93 is arranged between the first rack 91 and the second rack 92, the gear 93 is meshed and connected with the first rack 91 and the second rack 92, the gear 93 is connected to the operating table 1 by rotation, and a power part 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. In order to ensure structural stability, the first rack 91, the second rack 92 and the operating table 1 are connected through a linear guide rail.

[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 seat bracket 21 on the bridge rod 18, that is, to ensure the accuracy of the installation of the components supporting both ends of the 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 processing and installation errors within the allowable range between the two adjacent bearing seat 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 an electric motor or a rotary motor, which is fixedly connected to the operating table 1. The motor output shaft or the rotary motor output shaft is connected to the gear 93 through a key, and the gear 93 is driven to rotate by the motor or the rotary motor, and the first rack 91 and the second rack 92 are driven to move through the engagement of the gear 93.

[0029] In another embodiment, the power member 14 can be a hydraulic cylinder, which is connected to the operating table 1, and 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 engagement with 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 platform 1 in a sliding manner, and the sliding manner can be connected by linear guide rails.

[0031] Specifically, the head end fixing mechanism 5 and the tail end fixing mechanism 7 both include a sliding seat 51, and a positioning sleeve 52 is respectively provided on the opposite side of the two sliding seats 51 in a rotatable manner. The inner opening of the positioning sleeve 52 is provided with a chamfered structure 53 that matches the shoulder of the bridge rod. The chamfered 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, and extends the two ends of the bridge rod 18 into the positioning sleeve 52 until the chamfered structure 53 is clamped with the shoulder of the bridge rod 18 to complete the fixation of the bridge rod 18.

[0032] It should be explained that a rotating power part 54, a frame 55 and a mounting plate 56 are provided on the side of the sliding seat 51 close to the positioning sleeve 52. The sliding seat 51 is connected to the rotating power part 54 by rotation. The rotating power part 54 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 part 54 is a rotary drive at the head end fixing mechanism 5, and the rotating power part 54 is a rotary bearing at the tail end fixing mechanism 7, which ensures that the bridge rod 18 restricted in the head end fixing mechanism 5 and the tail end fixing mechanism 7 can rotate around its own axis, thereby facilitating the full welding work requirements of the accessories.

[0033] The three brake base plate fixing mechanisms 8 are connected to the mounting plate 56 in a fixed structural manner. The brake base plate fixing mechanism 8 includes a telescopic power part B81, a mounting sleeve 82, and a pull rod 83. The output shaft of the telescopic power part B81 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 provided with a clamping block 84 by means of a plug-in plate, which facilitates the rapid clamping and fixing of the brake base plate, thereby improving efficiency and installation accuracy. The telescopic power part B81 is a cylinder or a hydraulic cylinder.

[0034] It needs to be explained that the power mechanism A6 includes a rotating power part 61 connected to the head end fixing mechanism 5 and the tail end fixing mechanism 7. The rotating power part 61 can be an electric product or a rotary motor. The output shaft of the rotating power part 61 is fixedly connected to a screw 62, and the screw 62 is connected to the sliding structure 4 by a threaded manner. The distance between the bearing seat bracket positioning mechanism 3 and the positioning sleeve 52 is adjusted by the power mechanism A6. The installation of the brake base plate and the bearing seat bracket of the same model support bridge can be completed with one adjustment, thereby ensuring the stability of the relative position 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, and improve practicality.

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

[0036] The bearing seat bracket positioning mechanism 3 is connected to the support leg 41 in a sliding manner along the Y direction, and the support leg 41 is connected to the bearing seat bracket positioning mechanism 3 through a linear guide rail. The bearing seat bracket positioning mechanism 3 includes a mounting seat 31, and a chuck 32 is detachably provided on one side of the inner end of the mounting seat 31. The axial hole of the bearing seat bracket 21 is sleeved on the outside of the chuck 32, and then the rotating downward pressure cylinder 33 provided on the mounting seat 31 on one side of the chuck 32 is used to restrict the bearing seat bracket 21 on the mounting seat 31 to complete the fixation of the bearing seat bracket 21. The support leg 41 is provided with a telescopic power part C42 that drives the mounting seat 31 to slide along the Y direction. The telescopic power part C42 can be a hydraulic cylinder or a cylinder, which can push the bearing seat bracket 21 fixed on the mounting seat 31 to move inward until the bearing seat bracket 21 fits against the side wall of the bridge rod 18.

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

[0038] In the above embodiments, the bridge pole needs to be lifted to the upper part of the operating table by tools such as a crane, and then the bridge pole 18 is lowered to the same height as the positioning sleeve 52. The worker holds the bridge pole 18 with his hand to complete the docking with the positioning sleeve 52, which easily leads to technical problems of centering difficulties. In order to solve the above problems, this embodiment provides a support frame 2 and a telescopic power part A10 for driving the support frame 2 up and down on the operating table 1. The telescopic power part A10 is a cylinder or a hydraulic cylinder. There are two support frames 2. The support frame 2 is connected to a guide rod 11. The guide rod 11 is slidably connected to the operating table 1. The beneficial effect achieved is: it can meet the support of bridge poles of different models and sizes and improve the stability of the docking work with the positioning sleeve 52.

[0039] It should be noted that an L-shaped bracket 12 with an inclined structure is provided on the upper end face of the support frame 2, which can prevent the bridge rod 18 from tipping over. Rollers 13 are provided on the two opposite side walls of the L-shaped bracket 12 in a rotating manner. The edges of the rollers 13 protrude from the side walls of the L-shaped bracket 12 to reduce the friction of the bridge rod 18 moving along the X direction. It should be noted that after the bridge rod 18 is placed on the rollers 13, the bridge rod 18 can pass through the center of the positioning sleeve 52 when it is lifted or lowered vertically to meet the centering requirements.

[0040] In the above embodiment, in order to reduce the installation error of the accessories in the axial direction of the bridge rod 18, it is necessary to use the power mechanism B to clamp the two ends of the bridge rod 18 through the positioning sleeve 52 of the head end fixing mechanism 5 and the positioning sleeve 52 of the tail end fixing mechanism. Since the clamping force is large and there are reasonable processing errors on the shoulders on both sides of the bridge rod 18, after the processing is completed, when the head end fixing mechanism 5 and the tail end fixing mechanism 7 move outward, it is easy to cause one end of the bridge rod 18 to not be separated from one of the positioning sleeves 52, and workers need to knock and pull to separate them. In order to solve the above technical problems, this embodiment A fixed leg 16 is fixedly arranged on the sliding seat 51, and the fixed leg 16 is fixedly provided with a telescopic power part D15. The telescopic power part D15 is a hydraulic cylinder or a pneumatic cylinder. The hydraulic cylinder or cylinder output shaft is fixedly connected with a push rod 17. The push rod 17 passes through the sliding seat 51 and the telescopic power part C54 and extends into the frame 55. After the processing is completed, the telescopic power part D15 is used to drive the push rod 17 to contact the top end face of the bridge rod 18, applying an outward thrust to the bridge rod 18 to disengage it from the positioning sleeve 52, so as to achieve the goal of quickly separating from the positioning sleeve and reduce the labor intensity of the workers.

[0041] The working principle and working process of the present invention 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 supporting bridge group.

[0042] The bridge rod 18 is lifted onto the L-shaped bracket 12 by a crane, and then the hydraulic cylinder 10 is started. 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 start the hydraulic cylinder 14, which drives the first rack 91 to move, and then the first rack 91 drives the gear 93 to rotate through meshing. The meshing of the gear 93 and the second rack 92 drives it to move, and then 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. The two ends of the bridge rod 18 are respectively extended 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 axial holes of the brake base plate 19 are respectively mounted on the outside of the corresponding mounting sleeve 82, and then the clamping block 84 is inserted into the clamping groove of the pull rod 83. The hydraulic cylinder 81 is started. The hydraulic cylinder 81 pulls the clamping block 84 through the pull rod 83, and then presses the brake base plate 19 against the surface of the mounting sleeve 82 to complete the fixed positioning work.

[0045] The axial hole of the bearing seat bracket 21 is sleeved on the outside of the chuck 32, and then the T-shaped frame is driven by the rotating downward pressure cylinder 33 to limit the bearing seat bracket 21 on the mounting seat 31 to complete the fixation of the bearing seat bracket 21. The hydraulic cylinder 42 is started to push the bearing seat bracket 21 fixed on the mounting seat 31 to move inward until the bearing seat bracket 21 is attached to the side wall of the bridge rod 18.

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

[0047] After welding is completed, start the support frame 2 to rise to support the bridge rod 18, remove the block 84, start the power mechanism B9 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 separated from the positioning sleeve 52, start the hydraulic cylinder 15, and the hydraulic cylinder 15 drives the push rod 17 to contact the top end face of the bridge rod 18, applying an outward thrust to the bridge rod 18 to separate it from the positioning sleeve 52, completing the operation.

[0048] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "front", "back", "lower left", "upper right", "outer", "clockwise", "counterclockwise", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Although the present invention has been described according to a limited number of embodiments, those skilled in the art, with the benefit of the above description, should understand that other embodiments are conceivable within the scope of the invention described herein.

Claims

1. Axle rod accessories welding tool, characterized by: include: Operation table (1); A bearing seat bracket positioning mechanism (3) and a sliding structure (4), wherein the two sets of bearing seat bracket positioning mechanisms (3) are connected to the operating table (1) via the sliding structure (4); A head end fixing mechanism (5), the head end fixing mechanism (5) is connected to the operating table (1), and the head end fixing mechanism (5) is provided with a power mechanism A (6) for driving the adjacent bearing seat bracket positioning mechanism (3) to slide; The tail end fixing mechanism (7) is connected to the operating table (1), and the tail end fixing mechanism (7) drives the adjacent bearing seat bracket positioning mechanism (3) to slide through the power mechanism A (6); A brake base plate fixing mechanism (8), the brake base plate fixing mechanism (8) is connected to the head end fixing mechanism (5) and the tail end fixing mechanism (7) respectively; A power mechanism B (9) is used to drive the head end fixing mechanism (5) and the tail end fixing mechanism (7) to move toward and away from each other.

2. The axle rod accessory welding tool according to claim 1, characterized in that: The operating table (1) is provided with a support frame (2) and a telescopic power member A (10) for driving the support frame (2) to move up and down. The support frame (2) is connected to a guide rod (11), and the guide rod (11) is connected to the operating table (1) in a sliding manner.

3. The axle rod accessory welding tool according to claim 2, characterized in that: An L-shaped bracket (12) with an inclined structure is provided on the upper end surface of the support frame (2), and rollers (13) are provided on two opposite side walls of the L-shaped bracket (12) in a rotatable manner, with edges of the rollers (13) protruding from the side walls of the L-shaped bracket (12).

4. The axle rod accessory welding tool according to claim 1, characterized in that: The head end fixing mechanism (5) and the tail end fixing mechanism (7) are both connected to the operating table (1) in a sliding manner; The power mechanism B (9) includes a first rack (91) and a second rack (92) arranged in parallel, a gear (93) is arranged between the first rack (91) and the second rack (92), the gear (93) is meshed and connected with the first rack (91) and the second rack (92), and a power member (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 axle rod accessory welding tool according to claim 4, characterized in that: The head end fixing mechanism (5) and the tail end fixing mechanism (7) both include a sliding seat (51), and positioning sleeves (52) are respectively provided on opposite sides of the two sliding seats (51) in a rotatable manner. The inner opening of the positioning sleeve (52) is provided with a chamfered structure (53) that matches the bridge rod shoulder.

6. The axle rod accessory welding tool according to claim 5, characterized in that: A rotating power member (54), a frame (55) and a mounting plate (56) are provided on one side of the sliding seat (51) close to the positioning sleeve (52). The sliding seat (51) and the rotating power member (54) are connected in a rotational manner. The rotating power member (54) is fixedly connected to the mounting plate (56) through the frame (55). The mounting plate (56) and the positioning sleeve (52) are connected in a fixed structural manner. The brake base plate fixing mechanism (8) is connected to the mounting plate (56) in a fixed structural manner.

7. The axle rod accessory welding tool according to claim 6, characterized in that: The brake base plate fixing mechanism (8) comprises a telescopic power member B (81), a mounting sleeve (82), and a pull rod (83). The output shaft of the telescopic power member 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 provided with a clamping block (84) by means of a plug-in plate.

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

9. The axle rod accessory welding tool according to claim 8, characterized in that: The sliding structure (4) includes a support leg (41) connected to the operating table (1) in a sliding manner in the X direction, and the support leg (41) is connected to the screw rod (62) by a threaded manner; The bearing seat bracket positioning mechanism (3) is connected to the support leg (41) in a sliding manner along the Y direction. The bearing seat bracket positioning mechanism (3) includes a mounting seat (31). A chuck (32) is provided on one side of the inner end of the mounting seat (31). A rotating downward pressure cylinder (33) is provided on the mounting seat (31) on one side of the chuck (32). The supporting leg (41) is provided with a telescopic power member C (42) for driving the mounting seat (31) to slide along the Y direction.

10. The axle rod accessory welding tool according to claim 9, characterized in that: The output shaft of the rotary downward pressure cylinder (33) is fixedly provided with a T-shaped frame (34).

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