| 摘要 |
A V-belt drive unit has an input pulley and an output pulley wherein one V-belt contacting pulley flank of each pulley extends at a small angle or substantially radially relative to the respective rotational axis of the pulley. the other V-belt contacting pulley flank is inclined at a larger angle relative to the respective rotational axis. The V-belt has respective flanks which are inclined at an angle which is at least one degree larger than the respective flank angle of the corresponding pulley. Further, the flank angles of the power input pulley differ from the corresponding flank angles of the respective power output pulley of a drive unit. The opening angle formed by the two flanks of a pulley is larger in the power output pulley than in the power input pulley. These features provide a substantial increase in the power transmission capacity of such drive units as compared to previous drive units of this type.
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