| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an oil pulse tool capable of accurately detecting the lowering of the performance of an oil pulse unit by detecting the leakage of oil from the oil pulse unit beforehand. <P>SOLUTION: This oil pulse tool includes a motor, an oil pulse unit driven by the motor, and an output shaft which is connected to the shaft of the oil pulse unit and to which an end tool is attached. The oil pulse tool includes rotating position detection sensors for detecting the rotating position of an output shaft and a torque detection sensor for detecting the occurrence of an impact torque. Times T1, T2 in which an impact occurs, the motor is reversely rotated, and the motor is forwardly rotated again and passes through the position where the impact has occurred are measured. The lowering of the performance of the oil pulse unit is detected by detecting the change of these times with time. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
