发明名称 |
IMPACT TOOL AND METHOD OF CONTROLLING IMPACT TOOL |
摘要 |
<p>An impact tool includes: a motor; a trigger; a controller configured to control driving power supplied to the motor using a semiconductor switching element according to an operation of the trigger; a striking mechanism configured to drive a tip tool continuously or intermittently by rotation force of the motor, the striking mechanism including a hammer and an anvil. The controller drives the semiconductor switching element at a high duty ratio when the trigger is manipulated. The motor is driven so that the duty ratio is lowered before a first striking of the hammer on the anvil is performed and the first striking is performed at a low duty ratio lower than the high duty ratio.</p> |
申请公布号 |
EP2934820(A1) |
申请公布日期 |
2015.10.28 |
申请号 |
EP20130821000 |
申请日期 |
2013.12.18 |
申请人 |
HITACHI KOKI CO., LTD. |
发明人 |
IWATA, KAZUTAKA;KOMURO, YOSHIHIRO |
分类号 |
B25B21/02;B25B23/147 |
主分类号 |
B25B21/02 |
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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