| 摘要 |
A hammer drill ( 2 ) includes a clockwise and counterclockwise driven tool spindle ( 28 ), a drive pinion ( 70 ) operatively connectable with the tool spindle ( 28 ) for transmitting a torque thereto, a separate control handle ( 6 ) for selecting one of the hammer drill functions including a pure drilling operation, a pure percussion operation, and a rotary-percussion operation), and a switching device ( 8 ) which is adjustable in accordance with a position of the control handle ( 6 ) and which is shiftable by the control handle ( 6 ) in a clockwise rotation position for effecting a pure drilling operation in a clockwise direction and in a counterclockwise rotation position for effecting a pure drilling operation in a counterclockwise direction.
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