GEAR TYPE VARIABLE ROTATION SPEED EQUIPMENT

PROBLEM TO BE SOLVED: To minimize an increase in the outside diameter of the equipment, obtain large capacity without increasing vibration and without inviting a large size and high costs in a supply system for a working liquid, and easily achieve a large size by increasing a degree of freedom in design. SOLUTION: This gear type variable rotating speed equipment is constituted in that a working liquid is supplied to an engaging space for the internal teeth of an outside gear 1 connected to a first rotary shaft 7 and the external teeth of a plurality of inside gears 21 connected to a second rotary shaft 11 and placed in a planetary shape; and rotational force is transferred through a working liquid, the internal teeth, and the external teeth between the first and the second rotary shafts. Large capacity is achieved by placing and fixing a plurality of inside gear shafts in a planetary shape on and to a flange 10 fixed to the second rotary shaft and by lengthening an eccentric distance from the axis of the outside gear, namely, the length of an arm.