A special vehicle sliding bearing disassembly tool and disassembly method

Abstract

The present invention provides a disassembly tool and a disassembly method for a sliding bearing of a special vehicle, which includes a nut, a screw rod, a pull arm seat, a support sleeve, a pull arm and a pin shaft; the rear end rod part of the screw rod is provided with threads, and a plurality of special-shaped sliding grooves are machined on the front end cylindrical surface; the pull arm seat includes a central body and a plurality of U-shaped grooves on the periphery of the central body, and the pull arm is connected to the pull arm seat through the pin shaft; a step part for hooking the sliding bearing is machined at the front end of the pull arm; the rear end rod part of the screw rod sequentially passes through the pull arm seat and the support sleeve and is connected to the nut; the pull arm seat can rotate relative to the screw rod and drive each pull arm to slide in the special-shaped sliding groove of the screw rod, and rotating the pull arm seat can drive the pull arm to slide to the pull arm limit surface and hook the sliding bearing. The structure of the present invention is simple, light in weight, small in size, convenient to carry, stable in limit, convenient to use, shortens the replacement time of the sliding bearing during maintenance, effectively reduces the working difficulty during the maintenance of the action system of the special vehicle, improves the working efficiency, and improves the maintainability of the vehicle.

Description

Technical Field

[0001] The invention belongs to the technical field of special vehicle operation systems, and particularly relates to a sliding bearing disassembly tool and a disassembly method for a light special vehicle operation system. Background Art

[0002] Sliding bearings are widely used in the operation systems of light special vehicles. Due to the harsh working environment of special vehicles, the service life of sliding bearings is limited. Generally, the sliding bearings at the torsion bar brackets need to be replaced during medium repairs. The sliding bearings are assembled with interference fit. During maintenance, a milling machine is required to damage the sliding bearings for disassembly, which is time-consuming and laborious. Therefore, it is necessary to design a sliding bearing disassembly tool that can directly pull out the sliding bearings and can be equipped with an electric wrench, a manual wrench or a lever according to the actual situation, so as to greatly shorten the disassembly time, improve the work efficiency of sliding bearing disassembly, and improve the maintainability of the vehicle. Summary of the Invention

[0003] (1) Technical Problems to be Solved

[0004] The invention provides a special vehicle sliding bearing disassembly tool and a disassembly method to solve the technical problems that there is no special tool for the sliding bearings in the torsion bar brackets of the special vehicle operation system, the disassembly difficulty of the sliding bearings is reduced, the disassembly time is shortened, and the work efficiency is improved.

[0005] (2) Technical Solutions

[0006] To solve the above technical problems, the invention provides a special vehicle sliding bearing disassembly tool, which includes a nut, a screw rod, a pull arm seat, a support sleeve, a pull arm and a pin shaft; wherein,

[0007] A threaded hole is machined at the central position of the nut;

[0008] Threads are provided on the rear rod part of the screw rod, and a plurality of special-shaped chutes evenly distributed in the circumferential direction are machined on the front cylindrical surface. The cross-section of each special-shaped chute includes a pull arm sliding surface connected to the bottom surface of the chute and a pull arm limiting surface located at the top of the pull arm sliding surface;

[0009] The pull arm seat includes a central body and a plurality of U-shaped grooves evenly distributed around the central body. A screw rod installation through hole is machined at the central position of the pull arm seat, and pin shaft installation holes are machined on the groove walls of each U-shaped groove; circular openings are machined at the rear ends of each pull arm, and the pin shaft passes through the circular openings of the pull arms and the pin shaft installation holes of the corresponding U-shaped grooves on the pull arm seat to connect the pull arms with the pull arm seat; step parts for hooking the sliding bearings are machined at the front ends of each pull arm;

[0010] The support sleeve is integrally in a cylindrical structure, and a circular hole for inserting the screw rod is machined at the central position of the rear end face; a rotation operation hole for the pull arm seat is machined on the barrel wall of the support sleeve;

[0011] The rear end rod of the screw rod passes through the screw rod mounting through hole of the pull arm seat and the circular hole on the top end surface of the support sleeve in sequence, and is connected to the central threaded hole of the nut; the pull arm seat can rotate relative to the screw rod, and drive each pull arm to slide in the special-shaped slide groove of the screw rod; when the pull arm is located at the bottom of the special-shaped slide groove, the front end of the pull arm is retracted to the cylindrical surface of the screw rod; when the pull arm seat is rotated to drive the pull arm to slide along the pull arm sliding surface of the special-shaped slide groove to the pull arm limiting surface, the front end step portion of the pull arm hooks the sliding bearing, and when the nut is turned and the sliding bearing is pulled out by the pull arm, the pull arm limiting surface of the special-shaped slide groove acts as a limit on the pull arm to prevent the pull arm from falling out.

[0012] Furthermore, the rear portion of the nut is a hexagonal column structure, and the front portion is provided with a cylindrical protrusion structure.

[0013] Furthermore, the rear end rod portion of the screw rod is provided with a left-hand thread.

[0014] Furthermore, three special-shaped sliding grooves evenly distributed around the circumference are processed on the front cylindrical surface of the screw; and three U-shaped grooves are evenly distributed around the periphery of the central body of the arm pull seat.

[0015] Furthermore, an annular boss for supporting the torsion bar bracket is arranged inside the front end surface of the support sleeve.

[0016] Furthermore, three rectangular openings are processed on the barrel wall of the support sleeve.

[0017] In addition, the present invention also proposes a method for disassembling a sliding bearing of a special vehicle, using the above-mentioned disassembly tool. The disassembly method includes first placing the disassembly tool on the torsion bar bracket, supporting the torsion bar bracket with the front end face of the support sleeve, and rotating the pull arm seat to make the pull arm slide in the special-shaped slide groove of the screw. When the pull arm slides to the bottom of the special-shaped slide groove, the disassembly tool is extended into the sliding bearing, and then the pull arm is slid in the opposite direction to the top of the special-shaped slide groove, and the pull arm is attached to the pull arm limiting surface at the top of the special-shaped slide groove. At this time, the front end step portion of the pull arm hooks the end face of the sliding bearing; the nut is turned to pull up the screw, and finally the sliding bearing in the torsion bar bracket is removed.

[0018] (III) Beneficial effects

[0019] The present invention provides a special vehicle sliding bearing disassembly tool and a disassembly method, which include a nut, a screw rod, a pull arm seat, a support sleeve, a pull arm and a pin shaft; the rear end rod part of the screw rod is provided with threads, and a plurality of special-shaped sliding grooves are machined on the front end cylindrical surface; the pull arm seat includes a central body and a plurality of U-shaped grooves on the periphery of the central body, and the pull arm is connected to the pull arm seat through the pin shaft; a step part for hooking the sliding bearing is machined at the front end of the pull arm; the rear end rod part of the screw rod passes through the pull arm seat and the support sleeve in sequence and is connected to the nut; the pull arm seat can rotate relative to the screw rod and drive each pull arm to slide in the special-shaped sliding groove of the screw rod, and rotating the pull arm seat can drive the pull arm to slide to the pull arm limiting surface and hook the sliding bearing. The structure of the present invention is simple, light in weight, small in size, convenient to carry, stable in limiting, convenient to use, shortens the sliding bearing replacement time during maintenance, effectively reduces the working difficulty during the maintenance of the special vehicle action system, improves the working efficiency, and improves the vehicle maintainability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the sliding bearing disassembly tool of the present invention;

[0021] Figure 2 is an exploded view of the structure of the sliding bearing disassembly tool of the present invention.

[0022] Figure 3 is a three-dimensional view of the screw rod structure in the present invention;

[0023] Figure 4 is a side view of the special-shaped sliding groove of the screw rod in the present invention;

[0024] Figure 5a is a schematic structural diagram of the pull arm seat installed on the screw rod in the present invention, Figure 5b is a cross-sectional view when the pull arm is at the bottom surface of the special-shaped sliding groove, Figure 5c is a cross-sectional view when the pull arm is at the pull arm limiting surface of the special-shaped sliding groove;

[0025] Figure 6 is a cross-sectional view of the working principle of the sliding bearing disassembly tool of the present invention;

[0026] Figure 7 is an external view of the working principle of the sliding bearing disassembly tool of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] To make the purpose, content and advantages of the present invention clearer, the following further describes the specific embodiments of the present invention in detail with reference to the drawings and embodiments.

[0028] This embodiment provides a special vehicle sliding bearing disassembly tool, and its structure is as shown in Figure 1 and 2 and includes a nut 1, a screw rod 2, a pull arm seat 3, a support sleeve 4, a pull arm 5 and a pin shaft 6.

[0029] The rear part of the nut 1 is of a hexagonal cylinder structure, and a cylindrical convex structure is provided at the front part. A threaded hole is machined at the central position of the nut 1. As Figure 3 shown, a left-handed thread is provided on the rear rod part of the screw rod 2, and three special-shaped sliding grooves evenly distributed in the circumferential direction are machined on the front cylindrical surface. As Figure 4 shown, the cross-section of each special-shaped sliding groove includes a pulling arm sliding surface connected to the bottom surface of the sliding groove and a pulling arm limiting surface located at the top of the pulling arm sliding surface.

[0030] The pulling arm seat 3 includes a central body and three U-shaped grooves evenly distributed around the central body. A screw rod mounting through hole is machined at the central position of the pulling arm seat 3, and a pin shaft mounting hole is machined on the groove wall of each U-shaped groove. There are three pulling arms 5 in total. A circular opening is machined at the rear end of each pulling arm 5. The pin shaft 6 passes through the circular opening of the pulling arm 5 and the pin shaft mounting hole of the corresponding U-shaped groove on the pulling arm seat 3 to connect the pulling arm 5 with the pulling arm seat 3. A step portion for hooking the sliding bearing is machined at the front end of each pulling arm 5.

[0031] The support sleeve 4 is integrally of a cylindrical structure. A round hole for inserting the screw rod 2 is machined at the central position of the rear end face, and an annular boss for abutting against the torsion bar bracket is provided inside the front end face. Three rectangular openings are machined on the barrel wall of the support sleeve 4 for rotating the pulling arm seat 3.

[0032] The rear rod part of the screw rod 2 passes through the screw rod mounting through hole of the pulling arm seat 3 and the round hole at the top end face of the support sleeve 4 in sequence, and is connected to the central threaded hole of the nut 1. The pulling arm seat 3 can rotate relative to the screw rod 2 and drive each pulling arm 5 to slide in the special-shaped sliding groove of the screw rod 2. When the pulling arm 5 rotates to different positions in the special-shaped sliding groove, the pulling arm 5 can protrude or retract from the cylindrical surface of the screw rod 2 so as to extend into the sliding bearing.

[0033] As Figures 5a - 5c shown, when the pulling arm 5 is located at the bottom of the special-shaped sliding groove, the front end of the pulling arm 5 retracts from the cylindrical surface of the screw rod 2, which is convenient for extending the pulling arm 5 into the sliding bearing; when the pulling arm seat 3 is rotated to drive the pulling arm 5 to slide along the pulling arm sliding surface of the special-shaped sliding groove to the pulling arm limiting surface, the front end step portion of the pulling arm 5 can hook the sliding bearing. When the nut 1 is screwed and the sliding bearing is pulled out by the pulling arm 5, the pulling arm limiting surface of the special-shaped sliding groove plays a limiting role on the pulling arm 5 to prevent the pulling arm 5 from coming out.

[0034] When using the disassembly tool of the present invention, as Figure 6 and 7As shown, first put the disassembly tool on the torsion bar bracket, support the torsion bar bracket with the front end face of the support sleeve 4, rotate the arm seat 3, so that the arm 5 slides in the special-shaped slot of the screw 2, and when the arm 5 slides to the bottom of the special-shaped slot, extend the disassembly tool into the sliding bearing, and then slide the arm 5 in the opposite direction to the top of the special-shaped slot, and make it stick to the arm limit surface at the top of the special-shaped slot, at this time, the front step of the arm 5 will hook the end face of the sliding bearing. Twist the nut 1, pull up the screw 2, and finally remove the sliding bearing in the torsion bar bracket.

[0035] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A special vehicle sliding bearing disassembly tool, characterized in that The disassembly tool includes a nut, a screw rod, a pull arm seat, a support sleeve, a pull arm and a pin shaft; wherein, A threaded hole is machined at the central position of the nut; Threads are provided on the rear rod portion of the screw rod, and a plurality of abnormally-shaped sliding grooves evenly distributed in the circumferential direction are machined on the front cylindrical surface. The cross-section of each abnormally-shaped sliding groove includes a pull arm sliding surface connected to the bottom surface of the sliding groove and a pull arm limiting surface located at the top of the pull arm sliding surface; The pull arm seat includes a central body and a plurality of U-shaped grooves evenly distributed on the periphery of the central body. A screw rod installation through-hole is machined at the central position of the pull arm seat, and a pin shaft installation hole is machined on the groove wall of each U-shaped groove; a circular opening is machined at the rear end of each pull arm, and the pin shaft passes through the circular opening of the pull arm and the pin shaft installation hole of the corresponding U-shaped groove on the pull arm seat to connect the pull arm to the pull arm seat; a stepped portion for hooking the sliding bearing is machined at the front end of each pull arm; The support sleeve is integrally in a cylindrical structure, and a circular hole for passing the screw rod is machined at the central position of the rear end face; a rotary operation hole for the pull arm seat is machined on the barrel wall of the support sleeve; The rear rod portion of the screw rod sequentially passes through the screw rod installation through-hole of the pull arm seat and the circular hole at the top end face of the support sleeve, and is connected to the central threaded hole of the nut; the pull arm seat can rotate relative to the screw rod and drive each pull arm to slide in the abnormally-shaped sliding groove of the screw rod; when the pull arm is located at the bottom of the abnormally-shaped sliding groove, the front end of the pull arm retracts to the cylindrical surface of the screw rod; when the pull arm seat is rotated to drive the pull arm to slide along the pull arm sliding surface of the abnormally-shaped sliding groove to the pull arm limiting surface, the stepped portion at the front end of the pull arm hooks the sliding bearing. When the nut is screwed and the sliding bearing is pulled out by the pull arm, the pull arm limiting surface of the abnormally-shaped sliding groove plays a limiting role on the pull arm to prevent the pull arm from disengaging; the rear part of the nut is in a hexagonal column structure, and a cylindrical convex structure is provided at the front part; a left-handed thread is provided on the rear rod portion of the screw rod.

2. The disassembling tool according to claim 1, wherein Three abnormally-shaped sliding grooves evenly distributed in the circumferential direction are machined on the front cylindrical surface of the screw rod; three U-shaped grooves are evenly distributed on the periphery of the central body of the pull arm seat.

3. The disassembling tool according to claim 1, wherein, An annular boss for abutting against the torsion bar bracket is provided inside the front end face of the support sleeve.

4. The disassembling tool according to claim 1, wherein Three rectangular openings are machined on the barrel wall of the support sleeve.

5. A method for disassembling a sliding bearing of a special vehicle, characterized in that, The disassembly method uses the disassembly tool according to any one of claims 1-4. The disassembly method includes first placing the disassembly tool at the torsion bar bracket, abutting the front end face of the support sleeve against the torsion bar bracket, rotating the pull arm seat to make the pull arm slide in the abnormally-shaped sliding groove of the screw rod. When the pull arm slides to the bottom of the abnormally-shaped sliding groove, the disassembly tool is inserted into the sliding bearing, then the pull arm slides reversely to the top of the abnormally-shaped sliding groove, and the pull arm abuts against the pull arm limiting surface at the top end of the abnormally-shaped sliding groove. At this time, the stepped portion at the front end of the pull arm hooks the end face of the sliding bearing; the nut is screwed to lift the screw rod, and finally the sliding bearing in the torsion bar bracket is removed.

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