| 摘要 |
PURPOSE:To carry-out valve control only through the shift in the axial direction by converting the relative revolution difference between input and output shafts to the shift in the axial direction of a sleeve and shifting the spool of a control valve in the axial direction by the above-described shift. CONSTITUTION:When a revolution difference is generated between an input shaft 2 and an output shaft 3, a ball 103 revolves in the peripheral direction with a rectilinear groove 100, but the ball 103 shifts in the axial direction, revolving in the peripheral direction, since the ball 103 is regulated by a spiral groove 101. Accompanied with the axial direction of the ball 103, a sleeve 105 engaged with the peripheral groove 102 of the ball 103 shifts in the axial direction, and the shift of the sleeve 50 is transmitted to a spool 13 through a pin 113. Therefore, switching f oil passages for feeding oil into a power cylinder 19 is performed between the spool 13 and the valve housing 12. |
