Operating mode switching apparatus for a hammer drill
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United States of America Patent
Stats
-
Mar 14, 2000
Grant Date -
N/A
app pub date -
Jan 28, 1998
filing date -
Apr 18, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A second pinion is rotatably supported around an intermediate shaft and slidable in an axial direction of the intermediate shaft. A pinion sleeve is fixed to the intermediate shaft. A first clutch mechanism selectively engages and disengages the second pinion with and from the pinion sleeve to selectively transmit and interrupt a rotational force of a motor to a tool attached on a front end of a hammer drill. A sleeve is supported around the intermediate shaft so as not to be rotatable about the intermediate shaft but slidable in the axial direction of the intermediate shaft. A motion converting member is rotatably supported around the intermediate shaft. The motion converting member converts the rotational force of the motor into the percussion force. A second clutch mechanism selectively engages and disengages the motion converting member with and from the sleeve to selectively transmit and interrupt the percussion force to the tool.
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