US 2013/0075219 A1Published application

Electromagnetic clutch

AssigneeJtekt Corporation

InventorsMinoru ONITAKE, Hiroshi Takuno, Kazuya Ando, Kenji Korenaga

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Abstract

An electromagnetic clutch includes: a first cam member having a first cam surface; a second cam member having a second cam surface facing the first cam surface; a coned disc spring that urges the second cam member such that the first and second cam surfaces are separated from each other; a clutch plate that contacts the second cam member due to urging force of the urging member, and generates friction force between the clutch plate and the second cam member; and an electromagnetic coil that generates magnetic force with which the second cam member is separated from the clutch plate against the urging force of the urging member. The first cam surface and the second cam surface generate thrust force by which the second cam member is pushed against the friction member, through relative rotation between the first cam member and the second cam member due to the friction force.

Claims12

Dependent claims

An electromagnetic clutch, comprising:

a first cam member that has a first cam surface formed to extend in a circumferential direction;
a second cam member that is rotatable relative to the first cam member within a predetermined angular range, and that has a second cam surface that faces the first cam surface;
an urging member that urges the second cam member such that the first cam surface and the second cam surface are separated from each other;
a friction member that is brought into contact with the second cam member by urging force of the urging member, and that generates friction force between the friction member and the second cam member;
and
an electromagnetic coil that generates magnetic force with which the second cam member is separated from the friction member against the urging force of the urging member, wherein
the first cam surface and the second cam surface generate thrust force by which the second cam member is pushed against the friction member, through relative rotation between the first cam member and the second cam member due to the friction force.

4 more elements

Dependencies are inferred from the claim text.