| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an oil passage structure capable of securing an oil passage for making a hydraulic fluid flow to a cylinder chamber, with a simple constitution for minimizing processing of a large part, in a double piston type continuously variable transmission mechanism. <P>SOLUTION: This double piston belt type continuously variable transmission mechanism 10 includes a fixed pulley 21 fixed to a rotary shaft 11 and a movable pulley 25 fitted by a spline to the rotary shaft 11 by a roller member 33, and includes the cylinder chamber of a double structure having a first cylinder chamber 28 and a second cylinder chamber 48. The transmission mechanism further includes the oil passage 36 arranged in a clearance between a spline groove 11a formed on the rotary shaft 11 and a spline groove 26a formed on the movable pulley 25 and communicating the first cylinder chamber 28 side with the second cylinder chamber 48 side, and the roller member 33 is formed with a passage 37 for communicating both-side oil passages 36 in the axial direction of the roller member 33. <P>COPYRIGHT: (C)2012,JPO&INPIT |
