Machine tool, in particular handheld machine tool

Abstract

#CMT# # / CMT# The tool has a torque limiter (5) lying in a planetary drive of a tool spindle (4) and accommodated in a housing part (25), where actuating torque of the limiter is adjusted by an axial detent support (6). The axial detent support is provided with spring supports (13, 14) that load a detent body (10). A supporting unit (24) is adjusted in an axial direction and supported at a side of a housing by the detent support. The detent body and the spring supports lie radially offset from each other. The supports include spring elements (16, 17) supported on the detent body by bridge units (31, 33). #CMT#USE : # / CMT# Machine tool e.g. handheld machine tool (claimed), such as cordless drill and cordless-screwdriver. #CMT#ADVANTAGE : # / CMT# The axially short planetary drive is combined in such a way with the axially shortly designed detent support, thus enabling the use of relatively long spring elements according to the radial position of the detent bodies to the spring support. The arrangement of the spring elements leads to a slender structure of the torque limiter, thus enabling the smaller overall length of the machine tool by the reduction of the torque limiter. #CMT#DESCRIPTION OF DRAWINGS : # / CMT# The drawing shows sectional views of spring supports and a detent body in radially outward offset position and radial offset inward position. 4 : Tool spindle 5 : Torque limiter 6 : Axial detent support 10 : Detent body 13, 14 : Spring supports 16, 17 : Spring elements 24 : Supporting unit 25 : Housing part 31, 33 : Bridge units.

Description

technical field [0001] The invention relates to a machine tool, in particular a hand-held machine tool. Background technique [0002] Such a power tool is known from DE 10 2004 058 809 A1 as a hand-held power tool in the form of a cordless screwdriver. In the machine tool, the tool receiver is driven via a multi-stage planetary gear. A torque limiting unit is provided in the transition to the tool receiver, by means of which the force flow between the electric motor and the tool receiver is interrupted when the transmitted torque exceeds a predetermined setpoint value. The torque limiting unit operates in a locking manner by means of a spring support which, during normal operation, fixes the planetary carrier of the planetary gear in a rotational position relative to the housing. Only when the torque to be transmitted to the tool receiver exceeds a set limit value is the planetary carrier released and the force flow to the tool receiver thus interrupted. [0003] In the d...

AI Technical Summary

Problems solved by technology

Overall, this configuration of the locking receiver arranged circumferentially relative to the planetary gear, with their axial overlap, results in a closed structural shape for the torque limiting unit, but also in the area of ​​use of the power tool. Restricted Structural Shape

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