Patent ID: 6286650
Filing Date: 2001-09-11
Classification: F16D

Abstract:
An electromagnetic clutch for selectively transmitting rotational force from a rotational power generating source to a slave-side equipment to be driven, said electromagnetic clutch comprising:a drive-side rotating member which is rotated by the rotational force;an electromagnetic coil for generating electromagnetic force when said electromagnetic coil is energized;a slave-side rotating member connected to the slave-side equipment;an armature which is coupled with said drive-side rotating member in response to the electromagnetic force generated by said electromagnetic coil; anda ring-shaped leaf spring for supporting said armature such that said armature is capable of being displaced toward said drive-said rotating member;wherein said ring-shaped leaf spring includes an outer ring portion connected to said armature, an attachment portion connected to said slave-side rotating member, and a connecting portion for connecting said outer ring portion and said attachment portion;said outer ring portion includes a plurality of fixing portions arranged in a circumferential direction thereof;a deflection generating portion for generating an initial deflection of said outer ring portion is disposed between said fixing portions; andsaid deflection generating portion is configured to cause the initial deflection of said outer ring portion while said electromagnetic coil is unenergized.