| 摘要 |
An electromagnetic clutch with rear compensating means having two sets of coacting friction discs adapted for releasably coupling a driving and driven rotary complement. When the clutch is energized, the armature, which is not in the drive train, contactively engages with the pole faces of the electromagnet causing the freely mounted armature to rotate with the driving member; an adjusting ring which is slidably splined to the driven rotary component and advanceably threaded to the armature for relative rotation therewith, thereby applies the necessary engagement pressure to the friction disc assembly causing torque to be transmitted from the driving to the driven rotary component through the disc assembly. Any lost motion occasioned by wear of the friction disc is automatically compensated by the screw-action of the adjusting ring upon the armature. When the clutch is de-energized, a resiliently biased braking member which is slidably splined to the clutch adjusting ring is caused to bear against a stationary braking body to achieve braking. The brake member is advanceably threaded to a brake adjusting ring to automatically compensate for wear of the braking surfaces.
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