Electromagnetic Clutch
AssigneeSanden Corporation
InventorMasanori Mogi
Life of this patent
Estimating the term…
Abstract
An electromagnetic clutch includes: a rotor 1 including therein an electromagnetic coil 16; and an armature 2 facing the rotor 1 and caused to be attached to the rotor 1 by a magnetic force of the electromagnetic coil 16. By excitation of the electromagnetic coil 16, a magnetic circuit M1 from the rotor 1 back to the rotor 1 through a first armature plate 21, an intermediate layer 22, a second armature plate 23, the intermediate layer 22, and the first armature plate 21 is formed when the rotor 1 and the armature 2 are not in contact, and a magnetic circuit M2 from the rotor 1 back to the rotor 1 through the first armature plate 21, a part 13a between adjacent slits 14 of the rotor 1, and the first armature plate 21 is formed when the rotor 1 and the armature 2 are in contact.
Claims3
An electromagnetic clutch comprising:
- a rotor that includes therein an electromagnetic coil;
- and
- an armature that faces the rotor, and is caused to be attached to the rotor by a magnetic force of the electromagnetic coil,
- wherein the rotor has a plurality of concentric slits on a contact surface with the armature,
- wherein the armature includes:
- a first armature plate that has one or more concentric slits each facing a contact surface between adjacent slits of the rotor;
- a second armature plate that is placed on a back side of the first armature plate;
- and an intermediate layer that is placed between the first armature plate and the second armature plate, and is lower in magnetic permeability than each of the first armature plate and the second armature plate, and
- wherein, by excitation of the electromagnetic coil, a magnetic circuit from the rotor back to the rotor through the first armature plate, the intermediate layer, the second armature plate, the intermediate layer, and the first armature plate is formed when the rotor and the armature are not in contact with each other, and a magnetic circuit from the rotor back to the rotor through the first armature plate, a part between the adjacent slits of the rotor, and the first armature plate is formed when the rotor and the armature are in contact with each other.
Dependencies are inferred from the claim text.