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Output shaft rotation restriction structure of hand-held machine tool

a technology of restriction structure and output shaft, which is applied in the direction of grinding drive, grinding machine components, manufacturing tools, etc., can solve the problems of difficult fixing of output shaft and inconvenient use of two wrenches, and achieve the effect of avoiding disengagement among structures and convenient assembly

Pending Publication Date: 2022-02-17
DIN LONG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention is a rotational output shaft restriction structure for a hand-held machine tool. This structure prevents accidental touching of the machine's control switch while replacing the grinding piece. The rotation restriction group is an independent component that can be easily assembled, making it easier to assemble and operate the machine.

Problems solved by technology

However, a conventional method using two wrenches is rather inconvenient; as a result, manufacturers of the hand-held machine tool alternatively provided a rotation restriction structure for the output shaft on the hand-held machine tool to overcome this defect.
The output shaft is difficult to be fixed once the steering gear set falling off from an engagement with the output shaft.
However, the user is likely to put the other four fingers on a drive switch, hence the possibility of mistakenly touching the drive switch when operating the output shaft rotation restriction structure.

Method used

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  • Output shaft rotation restriction structure of hand-held machine tool
  • Output shaft rotation restriction structure of hand-held machine tool
  • Output shaft rotation restriction structure of hand-held machine tool

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Embodiment Construction

[0030]The details and technical content of the invention will now be described with reference to the drawings as follows.

[0031]Refer to FIG. 1, FIG. 2, FIG. 3 and FIG. 4, the invention provides an output shaft rotation restriction structure 11 of a hand-held machine tool 10. Before describing the output shaft rotation restriction structure 11, the hand-held machine tool 10 is described first. In different embodiments, the hand-held machine tool 10 is a grinding machine tool including a grinding piece 20, or a cutting machine tool including the grinding piece 20, wherein the grinding piece 20 shown in FIG. 1 is provided only for explanation and is not limited thereto. Further, the hand-held machine tool 10 not only includes the output shaft rotation restriction structure 11, but also includes a shell 14, a drive assembly 15, a drive shaft 16, and an output shaft 17. The shell 14 includes a grip part 141 and a head part 142 connected to the grip part 141. In detail, the head part 142 ...

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PUM

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Abstract

A output shaft rotation restriction structure of a hand-held machine tool having a shell, a drive shaft in the shell, and an output shaft in the shell, perpendicular to the drive shaft, provided with a grinding piece, and in linkage with the drive shaft via a steering gear set; two sides of the hand-held machine tool may be defined according to an extension line of the drive shaft. The output shaft rotation restriction structure includes a mounting hole on the shell, specifically, one of the two sides of the hand-held machine tool, a restriction hole on the output shaft and facing the mounting hole, and a rotation restriction group including a holder in the mounting hole, a restriction plug on the holder, and a spring, the restriction plug being forced into the restriction hole to interfere with the rotation of the output shaft.

Description

FIELD OF THE INVENTION[0001]The invention relates to an output shaft rotation restriction structure, in particular to an output shaft rotation restriction structure of a hand-held machine tool.BACKGROUND OF THE INVENTION[0002]To avoid that an output shaft is driven by a grinding piece when replacement of the grinding piece for a conventional hand-held machine tool, so as to allow the grinding piece to be removed relative to the output shaft difficultly. In the process of replacing the grinding piece by using two wrenches in the prior art, the output shaft is fixed by any one of the two wrenches and the other one of the two wrenches rotates a sleeve at a bottom end of the output shaft, thereby releasing the sleeve and replacing the grinding piece. However, a conventional method using two wrenches is rather inconvenient; as a result, manufacturers of the hand-held machine tool alternatively provided a rotation restriction structure for the output shaft on the hand-held machine tool to...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B24B23/02B24B45/00
CPCB24B23/02B24B47/12B24B45/003
Inventor HSIEH, JUNG-FU
Owner DIN LONG IND