| 摘要 |
PROBLEM TO BE SOLVED: To reduce friction resulting from sliding of constituent components of an actuator and ensure smooth motion of the actuator and the long life of the actuator.SOLUTION: A continuously variable transmission actuator is configured so that an actuator 5 includes: a ball screw shaft 21a rotating about an axis by a motor 10; a ball screw nut 23a moving axially in response to the rotation of the ball screw shaft 21a and provided on the ball screw shaft 21a; a coupling member 24 attached to the ball screw shaft 23a; a guide member 27 guiding the coupling member 24 axially while prohibiting the coupling member 24 from rotating about an axis; and an arm 29 urging a movable sheave 4 to a fixed sheave 3, a notch groove 28 guiding the coupling member 24 is formed in the guide member 27, and this notch groove 28 includes a parallel portion 30 that slides relatively to the coupling member 24 and that is provided on a coupling side of the coupling member 24 to the arm 29 and a wide portion 31 that does not slide relatively to the coupling member 24 and that is provided on an axially opposite side to the coupling side.SELECTED DRAWING: Figure 4 |
