Locating pin pulling-out tool

Abstract

The utility model relates to the technical field of maintenance tools, in particular to a positioning pin pulling-out tool which comprises a clamping assembly, a pull-out assembly and a pull-out assembly. The pre-pressing assembly is arranged on one side of the clamping assembly and used for primarily limiting the positioning pin; the supporting rod is arranged at the bottom of the pre-pressing assembly and used for supporting the pre-pressing assembly and the clamping assembly; the hydraulic system is arranged on the supporting rod and used for pushing the supporting rod to move; the pre-pressing assembly and the clamping assembly are arranged, the hollow cylinder and the positioning pin are clamped through the pre-pressing assembly, the hollow cylinder and the positioning pin are kept to be coaxially arranged, then the hollow cylinder and the positioning pin are fixed by screwing a fixing bolt inwards, when the hollow cylinder is pulled out, a push plate can be pushed through a hydraulic rod, and the push plate can drive the whole clamping assembly to move outwards; therefore, the positioning pin is pulled out.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance tooling, in particular to a positioning pin pulling tooling. Background Art

[0002] The wheel drive is mainly composed of a traction motor and a wheelset. The traction motor and the axle box of the wheelset are assembled together to form the wheel drive. In order to ensure the relative position accuracy of the traction motor and the wheelset assembly, a locating pin was set on the traction motor mounting seat and its relative position with the axle box mounting seat during the original design.

[0003] When the traction motor is overhauled after the wheel drive is disassembled, the pin needs to be removed for overhaul, but the pin is cylindrical and there is no design for the pull-out force structure, making it difficult to pull the pin out. It is understood that the original manufacturer currently uses hot-fire welding or drilling methods to lengthen the size of the locating pin and then use a hydraulic jack to pull it out, but this operation method requires welding or drilling, and the use of hydraulic equipment, which takes a long time, has high requirements, and is inefficient. In addition, the hydraulic equipment will fall off along with the locating pin when it is pulled out, which does not meet the safety operation specifications and poses certain labor safety risks. Utility Model Content

[0004] The purpose of the utility model is to solve the above-mentioned shortcomings and provide a positioning pin extraction tool.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A positioning pin extraction tool, comprising:

[0007] A clamping assembly, used for clamping on the surface of the positioning pin;

[0008] A pre-pressing component is arranged on one side of the clamping component and is used to initially limit the positioning pin;

[0009] A steel sleeve is sleeved on the clamping assembly and fixed on the traction motor to support the preloading assembly and the clamping assembly;

[0010] The hydraulic rod is arranged on the steel sleeve and is used to push the clamping assembly to move.

[0011] Furthermore, the clamping assembly includes a hollow cylinder, on which three fixing bolts are distributed in a circumferential array, the fixing bolts are used to clamp on the positioning pins, and the pre-stressing assembly is arranged on one side of the hollow cylinder.

[0012] Furthermore, the prestressing assembly includes a fixed sleeve connected to the hollow cylinder, a sliding rod is arranged in the fixed sleeve, a synchronous driving member is sleeved on the sliding rod, and three prestressing rods are connected to the movable end of the synchronous driving member, and the prestressing rods are inserted into the hollow cylinder.

[0013] Furthermore, a sliding groove is provided on the fixed sleeve, and the synchronous driving part includes a movable slider sleeved on the sliding rod, and three connecting blocks sliding in the sliding groove are distributed in a circular array on the movable slider, and a driving rod is rotatably connected to the connecting block, and the end of the driving rod away from the connecting block is rotatably connected to the pre-stressing rod. A limit spring sleeved on the sliding rod is also provided on one side of the movable slider, and the movable slider is connected to the inner wall of the fixed sleeve through the limit spring.

[0014] Furthermore, a connecting rod is provided at one end of the fixed sleeve away from the hollow cylinder, the connecting rod passes through the steel sleeve and extends outward, the hydraulic rod is sleeved on the connecting rod, and a push plate is provided at one end of the steel sleeve away from the fixed sleeve. The movable end of the hydraulic rod is connected to the push plate, and a locking bolt is also provided on the push plate.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model is provided with a pre-stressing component and a clamping component. The pre-stressing component is firstly clamped on the locating pin to keep the hollow cylinder and the locating pin coaxially arranged, and then fixed by tightening the fixing bolts inwardly. When pulling out, the push plate can be pushed by the hydraulic rod, and the push plate will drive the entire clamping component to move outward, so as to pull out the locating pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection between the pre-pressing component and the push plate of the utility model;

[0020] Figure 3 It is a structural schematic diagram of the clamping assembly of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the pre-pressing component of the utility model.

[0022] In the figure: 1. Clamping assembly; 11. Hollow cylinder; 12. Fixing bolt; 2. Pre-stressing assembly; 20. Connecting rod; 21. Fixed sleeve; 22. Sliding rod; 23. Sliding groove; 24. Moving slider; 25. Limiting spring; 26. Connecting block; 27. Driving rod; 28. Pre-stressing rod; 3. Steel sleeve; 4. Hydraulic rod; 5. Push plate; 6. Locking bolt. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0025] Reference Figure 1-Figure 4 As shown, a positioning pin extraction tool comprises:

[0026] A clamping assembly 1, used for clamping on the surface of the positioning pin;

[0027] The pre-pressing component 2 is arranged on one side of the clamping component 1 and is first clamped on the positioning pin, so that the clamping component 1 and the positioning pin can be arranged coaxially;

[0028] The steel sleeve 3 is sleeved on the clamping assembly 1. When installing, the clamping assembly 1 and the pre-pressing assembly 2 are first inserted into the steel sleeve 3, and then the steel sleeve 3 can be pressed on the traction motor and fixed by hand;

[0029] A hydraulic rod 4 is also provided, which is arranged on the steel sleeve 3, and the rear end of the clamping assembly 1 extends from the rear end of the steel sleeve 3 and can slide back and forth, so that the clamping assembly 1 can be driven by the hydraulic rod 4 to move backward and pull out the positioning pin.

[0030] In one embodiment, the clamping assembly 1 includes a hollow cylinder 11, and three fixing bolts 12 are distributed in a circumferential array on the hollow cylinder 11, and the fixing bolts 12 are used to clamp on the positioning pin, and the pre-pressing assembly 2 is arranged on one side of the hollow cylinder 11;

[0031] After the hollow cylinder 11 is coaxially arranged with the positioning pin, the three fixing bolts 12 can be tightened inwardly to clamp the positioning pin.

[0032] In one embodiment, the pre-stressing assembly 2 includes a fixed sleeve 21 connected to the hollow cylinder 11, a slide rod 22 is arranged in the fixed sleeve 21, a synchronous driving member is sleeved on the slide rod 22, and three pre-stressing rods 28 are connected to the movable end of the synchronous driving member, and the pre-stressing rods 28 are inserted on the hollow cylinder 11;

[0033] Before using the clamping assembly 1 to fix the locating pin, first put the hollow cylinder 11 on the locating pin, and then push the synchronous drive member to move. The synchronous drive member can simultaneously drive the three pre-stressing rods 28 to move inward at the same time and fit tightly against the locating pin to complete the pre-stressing and keep the hollow cylinder 11 coaxial with the locating pin.

[0034] In one embodiment, a slide groove 23 is provided on the fixed sleeve 21, and the synchronous driving member includes a moving slider 24 sleeved on the slide rod 22, and three connecting blocks 26 that slide in the slide groove 23 are distributed in a circumferential array on the moving slider 24, and a driving rod 27 is rotatably connected to the connecting block 26, and one end of the driving rod 27 away from the connecting block 26 is rotatably connected to the pre-compression rod 28, and a limiting spring 25 sleeved on the slide rod 22 is also provided on one side of the moving slider 24, and the moving slider 24 is connected to the inner wall of the fixed sleeve 21 through the limiting spring 25;

[0035] When the pre-stress rod 28 is pushed inward, the pre-stress rod 28 will simultaneously drive the three pre-stress rods 28 to move together, so that the pre-stress rod 28 is tightly attached to the surface of the positioning pin for pre-stressing, and provides a support for the hollow cylinder 11, which is convenient for tightening the fixing bolt 12. When the pre-stress rod 28 moves inward, it will push the driving rod 27, causing the driving rod 27 to deflect inward, and the driving rod 27 will push the moving slider 24, and the moving slider 24 will slide along the slide rod 22, and at the same time, it will also compress the limit spring 25. After the positioning pin is fixed by the clamping assembly 1, the pre-stressing assembly 2 can be released.

[0036] In one embodiment, a connecting rod 20 is provided at one end of the fixed sleeve 21 away from the hollow cylinder 11, the connecting rod 20 penetrates the steel sleeve 3 and extends outward, the hydraulic rod 4 is sleeved on the connecting rod 20, and a push plate 5 is provided at one end of the steel sleeve 3 away from the fixed sleeve 21, the movable end of the hydraulic rod 4 is connected to the push plate 5, and a locking bolt 6 is also provided on the push plate 5, and the push plate 5 can be installed on the connecting rod 20 through the locking bolt 6;

[0037] When the positioning pin needs to be pulled out, the hydraulic rod 4 can be started, and the hydraulic rod 4 pushes the push plate 5 outward, and the push plate 5 can drive the clamping assembly 1 to move backward through the connecting rod 20, so as to pull out the positioning pin.

[0038] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A positioning pin extraction tool, characterized in that: include: A clamping assembly (1) is used to clamp on the surface of the positioning pin; A pre-pressing component (2) is arranged on one side of the clamping component (1) and is used to initially limit the positioning pin; A steel sleeve (3) is sleeved on the clamping assembly (1) and fixed on the traction motor, and is used to support the pre-pressing assembly (2) and the clamping assembly (1); A hydraulic rod (4) is arranged on the steel sleeve (3) and is used to push the clamping assembly (1) to move.

2. A positioning pin extraction tool according to claim 1, characterized in that: The clamping assembly (1) comprises a hollow cylinder (11), on which three fixing bolts (12) are distributed in a circumferential array, and the fixing bolts (12) are used to clamp on the positioning pins. The preloading assembly (2) is arranged on one side of the hollow cylinder (11).

3. A positioning pin extraction tool according to claim 2, characterized in that: The pre-stressing assembly (2) comprises a fixed sleeve (21) connected to the hollow cylinder (11), a sliding rod (22) is arranged in the fixed sleeve (21), a synchronous driving member is sleeved on the sliding rod (22), and three pre-stressing rods (28) are connected to the movable end of the synchronous driving member, and the pre-stressing rods (28) are inserted into the hollow cylinder (11).

4. A positioning pin extraction tool according to claim 3, characterized in that: The fixed sleeve (21) is provided with a slide groove (23), and the synchronous driving member comprises a movable slider (24) sleeved on the slide rod (22), and three connecting blocks (26) are arranged in a circumferential array on the movable slider (24) and slide in the slide groove (23), and a driving rod (27) is rotatably connected to the connecting block (26), and one end of the driving rod (27) away from the connecting block (26) is rotatably connected to the pre-compression rod (28), and a limiting spring (25) sleeved on the slide rod (22) is also provided on one side of the movable slider (24), and the movable slider (24) is connected to the inner wall of the fixed sleeve (21) through the limiting spring (25).

5. A positioning pin extraction tool according to claim 4, characterized in that: A connecting rod (20) is arranged at one end of the fixed sleeve (21) away from the hollow cylinder (11), the connecting rod (20) passes through the steel sleeve (3) and extends outward, the hydraulic rod (4) is sleeved on the connecting rod (20), a push plate (5) is arranged at one end of the steel sleeve (3) away from the fixed sleeve (21), the movable end of the hydraulic rod (4) is connected to the push plate (5), and a locking bolt (6) is also arranged on the push plate (5).

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