Electromagnetic Clutch And Compressor

摘要

To provide an electromagnetic clutch that prevents an armature from being reattracted to a rotor after a bridge wire is cut. Provided is an electromagnetic clutch 10 provided with a power interruption device 50 that forcibly interrupts power transmission to an electromagnetic coil 42. The power interruption device 50 includes a thermally-actuated member 51 attached to a rotor 21 and displaced at over a predetermined temperature, and a bridge wire 52 extending as a part of ground wire of the electromagnetic coil 42 and stretched across an area where the thermally-actuated member moves along with rotation of the rotor 21. The thermally-actuated member 51 is displaced to collide with and cut the bridge wire. The bridge wire 52 has a cutting region apart from a position where the displaced thermally-actuated member 51 collides with the bridge wire 52.

主权项

1. An electromagnetic clutch, comprising:
a rotor rotated with a power of a driving source; an armature provided opposite to the rotor and connected to a rotation shaft of a driven device; an electromagnetic coil unit that includes an electromagnetic coil, and causes magnetic attraction between the rotor and the armature upon electric power supply to the electromagnetic coil; and a power interruption device that forcibly interrupts power supply to the electromagnetic coil, wherein the power interruption device includes:
a thermally-actuated member attached to the rotor, and displaced at over a predetermined temperature; anda bridge wire stretched across an area where the thermally-actuated member moves along with rotation of the rotor and extending as a part of ground wire of the electromagnetic coil, wherein the displaced thermally-actuated member collides with the bridge wire to cut the bridge wire, and wherein the bridge wire has a cutting region apart from a position where the displaced thermally-actuated member collides with the bridge wire.