TWO-STEP SPEED CHANGE CLUTCH

PURPOSE:To save energy and raise durability of the driven member of a planetary friction wheel assembly by providing a high speed side clutch to couple and decouple the output shaft with/from outer ring and a low speed side clutch to couple and decouple the carrier with and from the output shaft. CONSTITUTION:Exciter coils 3, 4 fixed to a plate 19 are projected into a ring- shaped concave excavated in the outer ring 2, on which a pulley 21 is installed protruding from its circumference, and a planet roller 5 of nonmagnetic material born by the carrier 11 rotatably is pressure fitted between the outer ring 2 and an inner ring 6 which is fitted in the center boss of the front casing 1 of compressor. When current is applied to the exciter coil 3 the outer ring 2 attracts an armature for outer ring, 7, against the force of a lief spring 22 to consolidate the outer ring 2 with output shaft 14. When current is applied to the exciter coil 4, on the other hand, the carrier 11 attracts an armature for carrier, 8 and a coil spring 9 is wound aroung the carrier 11 to consolidate the output shaft 14 with the carrier 11.