Fixing clamp for shaft sleeve

Abstract

The present invention relates to a shaft sleeve retaining clamp. It includes seat body, clamp body and ejector pin positioned between above-mentioned seat body and clamp body. Said clamp body includes base seat and several jaws, on the upper portion of said base seat a conical hole is cut, said several jaws are uniformly distributed on the periphery of said conical hole, the lower portion of said base seat has a hollow cavity, and the base seat between the conical hole and hollow cavity is formed into an elastic portion, the upper end portion of said ejector pin is tightly supported on the elastic portion. Besides, said invention also provides its working principle and concrete operation method.

Description

technical field [0001] The invention relates to a fixture for fixing shaft sleeve parts, in particular to a clamp for fixing the shaft sleeve when machining the inner hole of the shaft sleeve. Background technique [0002] Shaft sleeve parts are widely used in industrial sewing machines, and the consumption is also large. The coaxiality, roundness and cylindricity of the inner hole processing have a great influence on the operation of the sewing machine. If the inner hole and the outer diameter of the bushing are not coaxial, it will cause the shaft and the bushing to lock during high-speed operation of the sewing machine, or the bushing and the shaft will rotate together, so that the sewing machine cannot operate normally; if the cylindricity and roundness of the inner hole The error of the degree is greater than 0.002mm. When the sewing machine is running at high speed, there will be point contact between the shaft and the shaft sleeve, which will accelerate the wear of th...

AI Technical Summary

Problems solved by technology

If the inner hole and the outer diameter of the bushing are not coaxial, it will cause the shaft and the bushing to lock during high-speed operation of the sewing machine, or the bushing and the shaft will rotate together, so that the sewing machine cannot operate normally; if the cylindricity and roundness of the inner hole The error of the degree is greater than 0.002mm. When the sewing machine is running at high speed, there will be point contact between the shaft and the shaft sleeve, which will accelerate the wear of the shaft sleeve and shaft, and directly affect the service life of the sewing machine.

The fixture used to fix the bushing in the prior art usually has a plurality of movable jaws. During loading and unloading, these jaws must be adjusted separately to move and clamp the workpiece. This kind of fixture is cumbersome to operate , Inefficiency, and because of the sequential action of multiple jaws, it is easier to clamp the parts, resulting in large errors in the roundness, cylindricity and coaxiality of the inner hole of the processed product, so the scrap rate is high

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