Irregularly-shaped thin-walled bushing dismounting tool

Abstract

The invention discloses an irregularly-shaped thin-walled bushing dismounting tool, which comprises an expansion sleeve arranged on the head of a handle, wherein an expansion shaft is movably arranged in the center of the expansion sleeve; the expansion sleeve and the expansion shaft have flared heads with the same taper; a through hole for supporting the tail of the expansion shaft is coaxially formed in the center of the handle; a plurality of expansion grooves are uniformly formed in the head of the expansion sleeve; a thread is formed on a shaft body of the expansion shaft; a nut which can be in threaded fit with the expansion shaft is arranged between the expansion sleeve and the handle, and is rotated to move the expansion shaft forwards and backwards in the expansion sleeve to realize the opening and the closing of the expansion sleeve. According to the irregularly-shaped thin-walled bushing dismounting tool, the expansion sleeve extends into an inner hole of an irregularly-shaped thin-walled bushing in a loose state, the nut is reversely rotated to open the expansion sleeve to further be pressed against the inner hole of the irregularly-shaped thin-walled bushing by the expansion shaft in a supporting way, and when the nut cannot be rotated, the handle is tightly held to pull out the irregularly-shaped thin-walled bushing. The irregularly-shaped thin-walled bushing dismounting tool is ingenious and simple in structure and convenient to operate, and has high popularization value, a dismounting process is quick and labor-saving, and an experience which can be learnt is provided for solving similar problems.

Description

technical field [0001] The invention relates to a small-diameter bush removal tool, in particular to a special-shaped thin-wall bush removal tool. Background technique [0002] The air-conditioning nozzle bushing is made of stainless heat-resistant steel turning machine to form a thin-walled special-shaped bush with large ends and a small middle. The bush has good elasticity and a small inner diameter. The hole and the cooling air hole of the casing, the guide vane can move freely relative to the casing during assembly, although the outer diameter of the bush and the installation inner hole are clearance fit, but the matching clearance is 0-0.1mm. After using for a period of time, the bushing needs to be disassembled for repair when it needs to be repaired. Due to the influence of the working environment, the bushing will be deformed, which will bring great difficulties to the disassembly work. Because the inner hole of the bushing is very small, it cannot be disassembled d...

AI Technical Summary

Problems solved by technology

After using for a period of time, the bushing needs to be disassembled for repair when it needs to be repaired. Due to the influence of the working environment, the bushing will be deformed, which will bring great difficulties to the disassembly work.

Because the inner hole of the bushing is very small, it cannot be disassembled directly by hand. Generally, to remove the bushing, use a small screwdriver to pry up the outer diameter of the bushing to deform it, and then use needle-nose pliers to clamp the deformed part and pull it hard. In this form of destruction, the removed bush cannot be used again, and it is very easy to scratch the inner hole of the outer diameter of the installed bush

Since there is no special tool for removing this special-shaped bush, although this method can achieve installation, it is extremely inconvenient to disassemble at the assembly site

In the engine, it is necessary to disassemble the special-shaped bushing in the inner hole with a diameter of 12mm. The assembler disassembles it by the traditional method in the past. The disassembly time is about 1-1.5 hours per piece, which is extremely inconvenient to operate, and there is no better way for this kind of disassembly, so it is difficult to achieve. , there is no experience to learn from, if the lock ring cannot be disassembled on time, it will affect the normal progress of the entire scientific research task

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