发明授权
- 专利标题: Power-driven screwdriver with removable depth stop
- 专利标题(中): 电动螺丝刀可拆卸深度停止
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申请号: US09388720申请日: 1999-09-02
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公开(公告)号: US06176162B1公开(公告)日: 2001-01-23
- 发明人: Manfred Ludwig , Wolfgang Schreiber
- 申请人: Manfred Ludwig , Wolfgang Schreiber
- 优先权: DE19845018 19980930
- 主分类号: B25B23157
- IPC分类号: B25B23157
摘要:
A screwdriver is disclosed, comprising a removable depth stop which selectably either, when equipped with the depth stop, allows noiseless shutoff or, with the depth stop removed, allows torque-dependent shutoff, without any chattering occurring when the machine continues to run. To this end, an adjustable torque-dependent release clutch is combined with an entrainment clutch of known type, which is additionally preceded by a disconnect clutch, a locking means being provided in order to hold a throwout ring, which forms one of the two elements of the disconnect clutch, in a predetermined position under load. In this way, noiseless operation is ensured after release, both when working with the depth stop and in the case of torque-dependent shutoff, with the depth stop removed.