| 摘要 |
PURPOSE:To reduce the size of a device, to decrease the weights of a sleeve and a spool, and to prevent displacement of a transmission position due to vibration and impact, by a method wherein a control valve is formed into 3-layer structure of a valve body, a sleeve, and a spool. CONSTITUTION:A control valve 20 is formed into a 3-layer structure of a valve body 21, secured to the under surface of a housing 3, a sleeve 22, which is slidably inserted into a valve body 21, and a spool 23 which is slidably inserted into the sleeve 22. The sleeve 22 is axially actuated with the aid of an actuator 25 of a transmission ratio control device forced into contact with an axle 24 located across the interior of the left end of the sleeve, and the spool 23 is driven by a precise cam 27 through a rockable bell cramp 26 forced into contact with the right end surface of the spool. A spring 28 is located between the left end surface of the spool 23 and the axle 24. |
