Electromagnetic clutch and pulley assembly

F - Mech Eng,Light,Heat,Weapons – 16 – D

Patent

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F16D 27/112 (2006.01)

Patent

CA 2319253

Electromagnetic clutch and pulley assembly comprising an electromagnetic coil (28) disposed adjacent to a pulley (14), with a clutch assembly (16) constructed to couple the pulley to the shaft (12) when the electromagnetic coil (28) is energized. The clutch includes a hub (32) coupled to the shaft (12), an armature disc (60), a torsion transmitting structure (50) and an axially compressible structure (90). The torsion transmitting structure (50) transmits torque from the armature disc (60) to the hub (32). The axially compressible structure (90) biases the armature disc (60) away from the pulley (14), and is axially compressed on energization of the coil (28) to permit the armature disc (60) to move into engagement with the pulley (14). The axially compressible structure (90) is substantially isolated from the torsional loads between the hub (32) and the armature disc (60).

L'invention concerne un ensemble électromagnétique embrayage/poulie qui comprend une bobine électromagnétique (28) disposée près d'une poulie (14) et un ensemble d'embrayage (16) conçu pour relier la poulie à l'arbre (12) lorsque la bobine électromagnétique (28) est sous tension. L'embrayage comprend un moyeu (32) couplé à l'arbre (12), un disque d'induit (60), une structure de transmission de torsion (50) et une structure à compression axiale (90). La structure de transmission de torsion (50) transmet le couple depuis le disque d'induit (60) vers le moyeu (32). La structure à compression axiale (90), qui éloigne le disque d'induit (60) de la poulie (14), subit la compression axiale lorsque la bobine électromagnétique (28) est sous tension, et ce pour permettre au disque d'induit (60) de se déplacer et de mettre en prise la poulie (14). La structure à compression axiale (90) est sensiblement isolée des charges de torsion entre le moyeu (32) et le disque d'induit (60).

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