Invention Grant
- Patent Title: Hand power tool, in particular drill hammer and/or jackhammer
- Patent Title (中): 手电工具,特别是钻锤和/或手提电锤
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Application No.: US11135187Application Date: 2005-05-23
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Publication No.: US07303026B2Publication Date: 2007-12-04
- Inventor: Karl Frauhammer , Heinz Schnerring , Willy Braun , Axel Kuhnle
- Applicant: Karl Frauhammer , Heinz Schnerring , Willy Braun , Axel Kuhnle
- Applicant Address: DE Stuttgart
- Assignee: Robert Bosch GmbH
- Current Assignee: Robert Bosch GmbH
- Current Assignee Address: DE Stuttgart
- Agent Michael J. Striker
- Priority: DE102004025951 20040527
- Main IPC: B25D11/00
- IPC: B25D11/00

Abstract:
A hand power tool has a housing, and drive motor accommodated in the housing, a tool receptacle in which a tool is guided, a gear mechanism, a driving gear, and rotary sleeve arranged so that via the gear mechanism, the driving gear, and the rotary sleeve the tool receptacle is drivable in rotation, a crank drive mechanism and a hammering mechanism located inside the rotary sleeve so that the tool receptacle is drivable through the crank drive mechanism and the hammering mechanism translationally, and a safety coupling provided between the driving gear wheel and the rotary sleeve and formed so that the safety coupling separates if a limit torque is exceeded, the safety coupling being formed as an overlock coupling seated on the rotary sleeve and having two axially adjacent coupling parts that mesh in a form-locked manner by torque-transmitting transmission elements and are overlockable if the limit torque is exceeded counter to an axially acting elastic force, one of the coupling parts being a part associated with the driving gear wheel and rotatable relative to the rotary sleeve while the other of the coupling parts is coupled to the rotary sleeve in a way that transmits torque.
Public/Granted literature
- US20050263306A1 Hand power tool, in particular drill hammer and/or jackhammer Public/Granted day:2005-12-01
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