シャフトドライブ式無段変速機用ディスク・ローラの最適設計

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タイトル別名
  • Optimum Design of Disk and Roller Shapes for Shaft Drive Continuously Variable Transmission

抄録

The novel mechanism CVT (Shaft Drive CVT, S-CVT) was developed by the authors. The theoretical efficiency is calculated to improve the efficiency and the torque capacity of the S-CVT. It is calculated from the components of torque and velocity. The component of torque is calculated from the loss torque of the bearings. The component of velocity is calculated from the shear model of traction oil in EHL contact area. The calculated efficiency gives good agreement with the experimental result. An optimum design of the two disks/rollers was achieved by using above calculation. In case of conical disk/roller, 9.4 Nm of the torque capacity and 2.5 point of the efficiency were improved comparing to the present conical disk/roller. In case of concave disk/roller, though 0.1 point of the efficiency decreased, 30.7 Nm of the torque capacity was improved by comparison to the present. To compare between two optimized disks/rollers, the conical disk/roller exceeds 15% of the transmission power.

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