Electromagnetic clutch
AssigneeGKN Driveline Torque Technology KK
InventorIsao Hirota
Life of this patent
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Abstract
An electromagnetic clutch 1 is disclosed having first and second relative rotary members 3, 5, an electromagnet 11 having a coil 7 and a yoke 9, a rotor 13 placed in close proximity to the electromagnet 11 and permeating magnetic field lines through the yoke 9, a friction clutch 15 operative to transfer drive torque between the first and second relative rotary members 3, 5, and an armature 17 permeating magnetic field lines coming from the rotor 13 for controlling coupling the friction clutch. The rotor 13 includes first and second magnetic members 21, 23 for forming at least one magnetic flux loop 19 and the first and second magnetic members 21, 23 are made of materials different from each other.
Claims16
An electromagnetic clutch comprising:
- first and second rotary members rotatable relative to each other;
- an electromagnet having a coil and a yoke;
- a rotor placed in close proximity to the electromagnet and through which magnetic field lines generated by the electromagnet are permeated, the rotor is associated with the first rotary member;
- a friction clutch operative to transfer drive torque between the first and second rotary members;
- an armature through which permeating magnetic field lines coming from the rotor are permeated to control coupling of the friction clutch;
- wherein the rotor includes first and second magnetic members for forming magnetic flux loops and the first and second magnetic members are made of materials different from each other, and
- wherein the first magnetic member is made of the material with a higher carbon content than that of the material of the second magnetic member.
An electromagnetic clutch comprising:
- first and second rotary members rotatable relative to each other;
- an electromagnet having a coil and a yoke;
- a rotor placed in close proximity to the electromagnet and through which magnetic field lines generated by the electromagnet are permeated, the rotor is associated with the first rotary member;
- a friction clutch operative to transfer drive torque between the first and second rotary members;
- an armature through which magnetic field lines coming from the rotor are permeated to control coupling of the friction clutch;
- wherein the rotor includes first and second magnetic members for forming magnetic flux loops and the first and second magnetic members are made of materials different from each other, and
- wherein the first magnetic member is made of the material with higher rigidity than that of the material of the second magnetic member.
Dependencies are inferred from the claim text.