发明名称 Electric handheld machine tool
摘要 An electric handheld machine tool includes: a tool spindle driven by an electric motor; a gearing situated between the tool spindle and the electric motor; and a manually adjustable operating element which has an adjustment travel, the adjustment travel having at least two functional ranges. Upon switching over from a first functional range to a second functional range, a mechanical additional function of the gearing is mechanically connected. The operating element is configured as a part of a motor switching element for influencing the current through the electric motor.
申请公布号 US9346154(B2) 申请公布日期 2016.05.24
申请号 US201113313419 申请日期 2011.12.07
申请人 ROBERT BOSCH GMBH 发明人 Roehm Heiko
分类号 B23B45/16;B25B21/00;B23Q5/10;B23Q5/12;B25B21/02;B25D16/00;B25F5/00 主分类号 B23B45/16
代理机构 Norton Rose Fulbright US LLP 代理人 Norton Rose Fulbright US LLP
主权项 1. An electric handheld machine tool, comprising: a tool spindle driven by an electric motor; a gearing situated between the tool spindle and the electric motor; a manually adjustable operating element which has an adjustment travel, wherein the adjustment travel has at least a first functional range and a second functional range, wherein: upon switching over between the first and second functional ranges, at least one mechanical additional function of the gearing is mechanically connected;the manually adjustable operating element is configured as a part of a motor switching element for influencing current through the electric motor; andduring the first functional range, the electric motor is configured to be activated but not the at least one mechanical additional function, wherein a variable force is applied to the manually adjustable operating element such that, upon switching over between the first and second functional ranges, an increased force is applied to the manually adjustable operating element, and wherein the increased force causes the manually adjustable operating element to return to the first functional range when the manually adjustable operating element is released, wherein the increased force is provided by at least one spring, and a pull rod supported on a return spring of the at least one spring that is fixed to a housing of the electric handheld machine tool, the return spring configured to apply a spring force to the pull rod in an adjustment travel direction from the second functional range to the first functional range, wherein, upon switching over between the first and second functional ranges, the return spring exerts a pressing force on the pull rod in the adjustment travel direction.
地址 Stuttgart DE