Mounting device for disk-shaped rotating tool

Abstract

An annular retaining groove is formed on the inner circumferential portion of the disk-shaped rotating tool, and a ringlike cushioning member is fitted in this annular retaining groove so as to be partially exposed. Both sides of the inner circumferential portion of the disk-shaped rotating tool are held by first and second holding members through the annular cushioning member. An axial portion of the first holding member is engaged with an output shaft of an electric rotary machine so that the disk-shaped rotating tool is rotated through the first holding member by the output shaft.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a device for mounting a disk-shaped rotating tool such as a grinding disk and a circular saw to an output shaft of an electric rotary machine in the condition that the tool is held from both sides thereof under elastic pressure.[0003]2. Description of the Related Art[0004]A grinding disk mounted on an output shaft of an electric rotary machine is used for leveling of the plane surface of a concrete, building material, and stone material, etc. or for any other various operations such as chamfering, repairing of a building wall surface, and removing of a painted surface. During such operations, a large impact is applied to an operator. In a conventional grinding disk, such a large impact is directly transmitted to the operator, making the operations difficult and having a physically adverse effect on the operator due to vibrations.[0005]To prevent such a physically adverse effect on the op...

AI Technical Summary

Benefits of technology

"The present invention provides a mounting device for a disk-shaped rotating tool that can reduce vibrations during operation with a simple structure. The device includes a first ring-like cushioning member fitted in a first annular retaining groove on the disk-shaped rotating tool, a first holding member fixed to the output shaft of the electric rotary machine, and a second holding member fixed to the first holding member to hold the disk-shaped rotating tool in cooperation with the first holding member. The output shaft has a seating surface and a screw shaft extending axially outside from the seating surface, and the first holding member has an internally threaded portion engaged with the screw shaft and an outer circumference formed with an externally threaded portion near one end surface abutting against the seating surface of the output shaft, and the second holding member has an internally threaded portion engaged with the externally threaded portion of the first holding member. The device can reduce vibrations during operation and improve the stability of the disk-shaped rotating tool."

Problems solved by technology

During such operations, a large impact is applied to an operator.

In a conventional grinding disk, such a large impact is directly transmitted to the operator, making the operations difficult and having a physically adverse effect on the operator due to vibrations.

Accordingly, the formation of the annular groove is difficult and the rigidity of the shock absorbing ring is reduced by the formation of the annular groove.

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