| 摘要 |
<p>A refrigerating compressor has a rotation detecting device which comprises a magnetic pickup (24) and a rear thrust race (20) which forms part of a needle roller thrust bearing (20). The rear thrust race (23) has two tab portions (232) and a projecting portion (233) and is disposed on the rear surface of a wobble plate (8). The magnetic pickup (24) is disposed on a cylindrical housing (1) of the compressor at a position adjacent the path of movement of the rear thrust race moving with the wobble plate. The magnetic flux leaking from an electromagnetic clutch mounted on the compressor flows to the rear thrust race (23) through a drive shaft (17) and bevel gear (14). When the projecting portion of the rear thrust race is close to the magnetic pickup, a magnetic flux is produced. The magnetic pickup detects the magnetic flux. Therefore, the movement of the compressing member of the compressor is detected by the magnetic pickup. As a result, when the compressing member of the compressor is locked, the clutch can be deactivated to stop the compressor quickly. </p> |
