Electromagnetic clutch

Details Electromagnetic clutch Electromagnetic clutch

1999-06-30

2000-12-19

Marmor, Charles A.

192 clutches and power-stop control

Clutches

Operators

192 84961, 192 841, F16D 1100, F16D 1900, F16D 2700, F16D 3702

Patent

active

061616710

ABSTRACT:
An electromagnetic clutch has an armature, a rotor housing accommodating a stator housing and an exciting coil having negative and positive terminals. A passage is formed to extend from an outer peripheral surface of the stator housing to the negative terminal and the positive terminal. The passage is filled with a conductive metal member having a melting point lower than that of the stator housing between the outer surface of the stator housing and the negative terminal. When frictional heat generated between the armature and the rotor housing exceeds a preset value, the metal member melts and flows to the positive terminal, thereby short-circuiting the coil. As a result, a fuse between a power source and the clutch is fused, thereby turning off the clutch. Therefore, the clutch does not need to have a thermal fuse therein and is reduced in size without increasing power consumption.

REFERENCES:
patent: 4236621 (1980-12-01), Mukai et al.
patent: 5687823 (1997-11-01), Nakagawa et al.

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