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power tool

A power tool and stopper technology, which is applied in the direction of manufacturing tools, wood processing appliances, portable mobile devices, etc., can solve the problems of cumbersome operation, time-consuming and laborious, and achieve the effect of improving convenience.

Active Publication Date: 2016-04-06
POSITEC TECH CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen that the traditional structure of installing the working head on the output shaft is very cumbersome and time-consuming to operate

Method used

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Examples

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Embodiment Construction

[0052] The invention relates to a power tool, in particular to a structure and a method for installing a working head on the power tool. Among them, the power tools can be electric circular saws, small electric circular saws, swing machines, angle grinders, miter saws, etc.; and the working head can be a straight saw blade, or a circular saw blade, sand disc, scraper, etc. other accessories.

[0053] In this embodiment, a small electric circular saw is cited to illustrate the creative concept of the present invention.

[0054] see figure 1 and figure 2 , a small electric circular saw 30, including a housing 32, a motor 34 accommodated in the housing 32, a transmission assembly 36 connected to the motor 34 for power transmission, driven by the transmission assembly 36 and used for installing a circular saw blade 38 output shaft 40 (such as image 3 shown). In the description of the present invention, unless otherwise indicated, directional terms, such as front, back, left...

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PUM

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Abstract

The present invention provides a power tool, which comprises an output shaft used for mounting and driving a working head to work, a fastener used for fixing the working head on the output shaft, a locking piece that moves between a locking position and a release position, an elastic element used for enabling the locking piece to always face the locking position and a retainer that can be selected to cooperate with the locking piece, wherein the locking piece is used for locking and releasing the working head. Such setting enables an operator to press the fastener only so that the fastener pushes the retainer to cause the retainer to get away from cooperation with the locking piece, while the locking piece moves to the locking position under an action of the elastic element and locks a rod part of the fastener to the output shaft, so that the working head is easily mounted on the output shaft. At the release position, the retainer cooperates with the locking piece so that the fastener can be easily dismounted from the output shaft, improving operation convenience.

Description

technical field [0001] The present invention relates to a power tool. Background technique [0002] A working head in a power tool, such as a circular saw blade, is typically driven by a rotary output shaft coupled to the power tool's motor. In many cases, circular saw blades have a hole through the center that accommodates the output shaft. One end of the output shaft where the circular saw blade is installed is provided with an internal thread. When installing, place the saw blade on the output shaft, extend the fastening bolt through the hole on the saw blade into the thread of the output shaft, and then tighten the fastening bolt with a wrench to fix the circular saw blade on the output shaft ; Similarly, loosen the fastening bolt by a wrench, and take off the fastening element from the output shaft to take off the circular saw blade. It can be seen that the traditional structure of installing the working head on the output shaft is very cumbersome and time-consuming ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B25F5/00
CPCB23D45/16B27B5/32B27B9/02
Inventor 王家达徐静涛钟红风张士松
Owner POSITEC TECH CHINA CO LTD