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Hand tool with friction clutch

A hand-held machine tool and clutch technology, which are applied in the directions of striking tools, manufacturing tools, portable impact tools, etc., can solve the problems of increasing manufacturing costs, assembly costs, and wrong operation, and reduce wear and tear, reduce the risk of wrong operation, The effect of reducing manufacturing costs

Inactive Publication Date: 2009-01-07
HILTI AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] A disadvantage of the known clutches is that they require a relatively high number of components, which on the one hand increases the manufacturing and assembly costs and on the other hand increases the risk of faulty operation

Method used

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  • Hand tool with friction clutch
  • Hand tool with friction clutch

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Experimental program
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Effect test

Embodiment Construction

[0015] FIG. 1 shows the front part of a hand power tool 2 in the form of a drill hammer. Inside the housing 4 it has a drive motor 6 which drives an impact device 10 via an intermediate shaft 8 and a drive element 12 in the form of a drive gear which is rotatable about an axis of rotation A.

[0016] The drive element 12 is rotationally coupled via a slip clutch, generally indicated at 14, to a substantially cylindrical output spindle 16 which extends centrally through a central bore 20 of the drive element 12, wherein the drive element 12 is axially displaceable Ground remains on the output spindle 16. The output spindle 16 is in turn connected in a rotationally fixed manner to a tool holder 18 , on which a tool 22 , for example a hammer drill, can be fastened.

[0017] For example, as can be seen in particular from FIG. 2 , the slip clutch 14 has a plurality of eg spherical clutch bodies 24 and a corresponding number of drive-side receptacles 26 on the drive part 12 and out...

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PUM

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Abstract

The present invention relates to a hand machine tool (2) which comprises a driving element (12) and an output principal axis (16) which extends along a rotation axis (A). A sliding clutch (14) is installed between the driving element and the output principal axis. The sliding clutch is provided with a plurality of clutches (24) which can be respectively in scarf joint with a group of accommodating part (26) at the driving side and a group of accommodating part (28) at the output side, wherein the scarf joint between the clutches (24) and one group in two groups of accommodating parts (26; 28) can be loosed through overcoming a spring force (F) generated by a spring (34). The accommodating part (28) at the output side is composed by a groove which is manufactured into the output principal axis (16) and is open relative to the rotation axis (A) along a radial direction.

Description

technical field [0001] The invention relates to a hand-held power tool with the features according to the preamble of claim 1 . In this case, the hand-held power tool has a drive element and an output spindle extending along the axis of rotation, which can be driven in rotation by the drive element. A slip clutch with a plurality of clutch bodies is arranged between the drive element and the output spindle. In this case, the coupling body engages or can engage with both a corresponding plurality of drive-side receptacles and a corresponding plurality of output-side receptacles. In this case, the engagement of the coupling body either with a set of drive-side receptacles or with a set of output-side receptacles can be canceled against a spring force generated by the spring element. Background technique [0002] The maximum value for the torque to be transmitted can thus be fixed or adjustable in such a hand power tool. When the maximum value is reached, the coupling body d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B25F5/00B25D17/10
CPCB25D2211/006B25D2250/321B25D2250/165B25D2211/061B25D2216/0023B25F5/001B25D16/003
Inventor 郭允J·诺伊曼M·哈特曼
Owner HILTI AG