| 摘要 |
A V belt type automatic transmission includes a driven pulley composed of a fixed sheave (31) and a movable sheave (32), and a torque cam mechanism (50) operating by an operational torque and which generates a thrust (F) in the direction for tightening a belt (26) at the time of a variation in torque. The torque cam mechanism (50) includes a first cam element (52) of a cam body (51) rotatable relative to both the sheaves (31, 32), and a second cam element (53) of the movable sheave (32). Both the sheaves (31, 32) are relatively non-rotatably coupled by splines (37, 38), and an operational torque is a torque obtained by summing up a first torque component transmitted from the belt (26) to the fixed sheave (31) and a second torque component transmitted from the belt (26) to the movable sheave (32).
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