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Electric hand tool machine having a tool locking system

A hand-held machine tool and tool lock technology, applied in the direction of manufacturing tools, striking tools, light impact tools, etc., can solve the problems of injury, danger, damage to electric hand-held machine tools, etc., and achieve the goal of reducing wear and high axial force Effect

Inactive Publication Date: 2008-06-25
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, both hands of the operator must be removed from the grip handle of the electric power tool, so that the operator can no longer securely hold the electric power tool
Especially when working on narrow scaffolding, there is a high risk when changing tools that the tool or even the entire electric hand tool slips out of the operator's hand and falls downwards
Risk of injury and damage to the electric hand tool as a result
In addition, this necessary grip is not very comfortable for the operator

Method used

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  • Electric hand tool machine having a tool locking system
  • Electric hand tool machine having a tool locking system

Examples

Experimental program
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Embodiment Construction

[0018] FIG. 1 shows a longitudinal section through a part of an electric hand-held power tool 1 in an exemplary embodiment of the invention, which mechanism constitutes a hammer drill. Mainly, the tool receiving device 2 of the electric hand-held power tool 1 is shown. The tool holder 2 has a substantially hollow-cylindrical holder body 3 into which a tool shank 4 of a tool 5 , not fully shown, is inserted. The tool 5 has an axis of rotation 6 which corresponds to a working axis 7 of the electric hand-held power tool. The receiving device body 3 has a plurality of perforations 8 distributed on the circumference, into which a locking body 9 is inserted in each case, wherein the perforations 8 are formed (axially) longer than the locking bodies 9 so that they can be axially The ground moves in the perforation 8. On its outer circumference, the tool shaft 4 has a plurality of longitudinal grooves 10 protruding beyond the axial section with locking bodies 9 , into which each loc...

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Abstract

The invention relates to an electric hand tool machine (1) having a tool locking system (25), which for the purpose of unlocking has an actuating element (16) that is displaceable counter to spring action axially into an unlocking position, wherein the actuating element (16) is fixable in unlocking position by means of a bayonet catch (41).

Description

technical field [0001] The invention relates to an electric hand-held power tool with a tool locking system which, for unlocking, has an actuating element that can be moved axially against the action of a spring into an unlocked position. Background technique [0002] Electric hand-held power tools of the above-mentioned type are known. There are therefore electric hand-held power tools, such as impact drills, which have a tool locking system by means of which a tool inserted into the electric hand-held power tool, such as a drill bit, can be secured as long as the operating element is locked. words in the stop position. For this purpose, the tool locking system has locking bodies which engage radially in axially extending grooves of the tool or tool shank, wherein the tool has a defined movement in the axial direction in the locked state. gap. In this case, radial deflection movements of the locking body are prevented by the axially displaceable locking element when the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B31/113B25D17/08
CPCB25D2216/0069B25D17/088B25D2217/0038B25D2250/325B23B31/113
Inventor H·申德勒P·勒纳特
Owner ROBERT BOSCH GMBH
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