| 摘要 |
PROBLEM TO BE SOLVED: To enable a rapid speed change operation as well as aiming at a reduction in size of a hydraulic pump for transferring a power roller and a reduction in power in a stepless speed change device in which an inside circular conic body corresponding to a sun gear and an outside annular body corresponding to a ring gear are coaxially arranged in a relatively and freely rotatable manner, an outer circumferential surface of the inside circular conic body and an inner circumferential surface of the outside annular body are opposed to each other, a power roller corresponding to a planetary gear is sandwiched, in a pressured manner, by the outer circumferential surface with a paralleled taper of an axially certain angle, and a stepless speed change is made possible by transferring axially the power roller in a gap between the inside and outside circumferential surfaces. SOLUTION: A support mechanism 13 supports the outside annular body 5 so as to be able to transfer in an axial O direction and in a speed change, separates the inside circumferential surface 6 of the outside annular body 5 from the outer circumferential surface 4 of the inside circular conic body 1. As a result, an actuator 11 corresponding to the hydraulic pump can be reduced in size and in power, thus enabling a telescopic rod 12 to transfer rapidly the power roller 7 with less force. COPYRIGHT: (C)2006,JPO&NCIPI |
