| 摘要 |
In a traction roller transmission having toric discs mounted opposite each other on its input and output shafts motion transmitting traction rollers are engaged between the toric discs and supported by pivotal roller support structures permitting adjustment of the ratio of motion transmission between the input and output shafts. A cam structure is arranged adjacent a toric disc to provide an axial contact force depending on the torque transmitted through the transmission, the cam structure having cam areas with different leads, the cam leads adjacent the cam crests being larger than those of the cam surfaces adjacent the cam low points so as to reduce the contact forces provided by the cam structure when the cam areas with large lead are utilized during high transmission ratio pivot positions of the traction rollers.
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