Patent ID: 7994673

Claim:
A generator comprising: a main shaft 10 to be rotated by an outer force; a cylindrical rotor 20 having rotor coil 1 being fixed to an outer periphery of a middle portion of the main shaft; a front cover 40 mounted to the periphery of the main shaft at a front side of the rotor through a bearing 41 for front cover; a front-side external cylinder 31 whose front end is fixed to a step portion 40 a , the step portion is provided at an outer periphery of a rear face of the front cover; a substantially cylindrical stator core portion 61 , a rear-side external cylinder 70 and a rear cover 71 being disposed at a rear side of the front-side external cylinder in this order, the rear cover is provided with a step portion for fitting the rear-side external cylinder; long bolts 73 inserted from the outer surface of the front cover, the long bolts pass through the rear cover 71 , the long bolts are tightened by respective tightening nuts 73 a , the long bolts combine the front cover 40 , the front-side external cylinder 31 , the stator core portion 61 , the rear-side external cylinder 70 and the rear cover 71 ; a tubular portion 56 projected forward from a rear-side base member 55 disposed at a rear side of the rear cover, the tubular portion projecting from the rear-side base member is inserted in the center of the rear cover, the cylinder portion supports the rear cover capable of rotation; a stator 60 disposed at an outer circumference of the rotor through a small gap 63 between them; a main gear 25 fixed to the main shaft; a ring gear 32 fixedly positioned with respect to the front cover 40 ; pinion gears 43 disposed between the main gear 25 and the ring gear 32 , each pinion gear has a fixed pinion shaft 42 , rotation of the main shaft in a forward direction rotates the stator 60 in a reverse direction through the main gear and the pinion gears and the inner ring gear; a pair of slip collars 4 a , 4 b concentrically provided to the rear cover, the rear cover 71 concurrently rotates with the stator 40 ; output circuits 6 a , 6 b , 6 c of stator coils 5 a , 5 b , 5 c connected to the slip collars through a rectification circuit 62 ; and brushes 7 a , 7 b for slip collars connected to a rear-side base member 55 fixedly secured to a base plate 50 , the brushes for slip collars come to contact with the slip collars, the brushes for slip collars output electricity.