发明名称 |
Motor-driven hand-held percussion tool |
摘要 |
A hand-held motor-driven percussion tool comprises a piston driven over an air cushion and acting over an axially movable anvil on the inner end of a tool axially movable in a tool receiver provided at one end of a tool housing. The anvil has an annular collar located in the cavity of an impact body which is movable in the direction of the impact of the piston against a cushioning ring. The impact body has an abutment face adapted to be engaged by a collar of the anvil when the latter is driven by the piston. A face of the impact body facing away from the cushioning ring is directed toward a part fixedly connected with the tool housing. The mass of the impact body is for instance 10% greater than that of the anvil. If the tool during operation is withdrawn from a workpiece, then the flange of the anvil impinges upon the abutment face of the impact body and accelerates the latter towards the cushioning ring. The anvil reaches in a region adjacent the impinging location a rest position, so that the piston will not engage the anvil any longer, and further striking of the percussion tool will cease.
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申请公布号 |
US4476941(A) |
申请公布日期 |
1984.10.16 |
申请号 |
US19820424993 |
申请日期 |
1982.09.27 |
申请人 |
ROBERT BOSCH GMBH |
发明人 |
BUCK, MANFRED;MUELLER, FRANK;WANNER, KARL |
分类号 |
B23B45/16;B25D17/06;B25D17/10;(IPC1-7):B25D17/00 |
主分类号 |
B23B45/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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