| 摘要 |
PROBLEM TO BE SOLVED: To increase a contact area of an armature and a rotor without dramatically increasing the cost for increasing the attraction of the armature and the rotor.SOLUTION: When grooves 44, 45A, 45B of the armature 42 and the rotor 43 are formed by laser machining, a metal oxide layer 100 is formed on a wall surface which defines the grooves 44, 45A, 45B. The metal oxide layer 100 is brought into sliding contact with a first contact surface A1 to a fourth contact surface A4 during use of an electromagnetic clutch, so that a part of the metal oxide layer 100 is ground or separated whereby particles composed of a metal oxide are generated. The particles enter a contact surface between the armature 42 and the rotor 43, so that the friction force therebetween is increased to thereby prevents slippage. As a result, the torque transmission capacity of an electromagnetic clutch M is enhanced and the increase of the torque of a scroll compressor is achieved. |
