发明名称 Handheld power tool having a shiftable mechanism
摘要 A handheld power tool with a shiftable mechanism, which is adjustable between two operating positions, has a coupling spring that is coupled with an adjustable shifting member of the mechanism. The coupling spring is embodied as a metastable spring.
申请公布号 US8978780(B2) 申请公布日期 2015.03.17
申请号 US201314135878 申请日期 2013.12.20
申请人 Robert Bosch GmbH 发明人 Grunwald Michael-Andreas;Pawlowski Marco;Welke Joerg;Saur Dietmar
分类号 B25F5/00;B25B21/00;B23B45/00 主分类号 B25F5/00
代理机构 Kenyon & Kenyon LLP 代理人 Kenyon & Kenyon LLP
主权项 1. A handheld power tool, comprising: a gear comprising at least two gear stages and a shiftable mechanism which is adjustable by a user control element between a first of the gear stages and a second of the gear stages of the hand-held power tool; and a coupling spring which acts on at least one mechanical component of the shiftable mechanism and is embodied as a metastable coupling spring which in a first operating position assumes a stable position and in a second operating position assumes a quasi-stable position, wherein in the quasi-stable position the coupling spring exerts a lesser spring force than in an intermediate position between the two operating positions.
地址 Stuttgart DE