| 摘要 |
PROBLEM TO BE SOLVED: To control axial pressurizing force of a contact part of a traction drive according to load torque, to eliminate post working such as cutting/ grinding, to required shorten working time, and to improve product yield, operation stability and efficiency. SOLUTION: In this frictional continuously variable transmission, carriers 25a and 25b are moved in the axial directions of input/output shafts 21 and 22 by a speed change mechanism 32, a contact part of a double cone 26, a sun roller 23 and an outer ring 24 is displaced, and continuously variable transmission is performed. Pressurizing cams 30 and 31 in which cam surfaces for imparting pressure contact force to the double cone 26 after changing pressure contact force according to input shaft torque and transmitting rotary torque are formed oppositely to the axial directions of the input/output shafts 21 and 22 are interposed into either one of at least between the sun roller 23 and a high speed shaft or between the outer ring 24 and a low speed shaft. The cam surfaces of the pressurizing cams 30 and 31 are made of cold forging working surfaces.
|
