| 摘要 |
The present invention relates to a variable traction drive transmission system. There is described a variable transmission system comprising input and output plates (11,14) each formed with a toroidal surface (12,15) having inner and outer edges and each being mounted for co-axial rotation upon respective axles (13,16); wherein the input and output plates are mounted with their toroidal surfaces opposed and wherein the system further comprises a rotation transmission element mounted between the input and output plates and in contact therewith. The present invention is characterised in that the rotation transmission element comprises two contacting races (21,22) of spheres, an input race (21) associated with the input plate and an output race (22) associated with the output plate. The system further comprises adjustment means (31;40,41,42,43,44,48) to enable movement of at least one sphere from a first position in which it contacts the adjacent plate at a position adjacent the outer edge thereof and a second in which it contacts the adjacent plate at a position adjacent the inner edge thereof.
|
