| 摘要 |
PURPOSE:To prevent the meandering of a transmission belt and improve durability by constituting a feeding oil passage formed in the axial direction on a rotary shaft so that the both edges are closed in the rotary shaft and forming a communication hole to a hydraulic cylinder apparatus and a taking-in hole from a hydraulic source in the radial direction onto the rotary shaft. CONSTITUTION:The control hydraulic pressure of a hydraulic cylinder apparatus 130 is supplied through a feeding oil passage 108 formed in the axial direction on a rotary shaft 104. The right edge of the feeding oil passage 108 is closed by a wall surface, and the left side is closed by a sensing valve 500. Further, taking-in hole 502 and a communication hole 506 are formed in the radial direction. Therefore, when the control hydraulic pressure passes through the feeding oil passage 108, each thrust force generated in the direction of the both edges is offset, and the generation of thrust force can be prevented. |
