| 摘要 |
<p>PROBLEM TO BE SOLVED: To improve work efficiency by detecting the rotating direction of a rotating shaft of a motor from the outside, and making action visually confirmable accurately and safely. SOLUTION: A motor-integrated type hydraulic pump device housed in integrated unit structure with a motor 2 and a variable displacement pump 4 coaxially connected in the same housing is provided with a rotation detecting shaft with a mark 15 put to an end face; a transparent cover 13 for closing the device and observing the end face of the rotation detecting shaft from the outside; rotation transmission mechanism for connecting the rotation detecting shaft to a motor rotating shaft 3 and transmitting torque to the rotation detecting shaft only when the motor rotating shaft is rotated in one direction; a waveform forming means for forming rectangular waveform phase by respective phases from alternating voltage waveform of second phase and third phase based on alternating voltage of first phase; a phase discriminating means for sending a normal rotation signal or a reverse rotation signal on the basis of phase difference between rectangular waveform of second phase and rectangular waveform of third phase; and an output means for outputting the normal rotation signal or reverse rotation signal to the outside.</p> |
