| 摘要 |
<p>PURPOSE:To control the displacement to be variable from the outside, by adjusting a relative positional relation between a track and a cylinder with respect to a drive shaft, and thereby making the displacement variable. CONSTITUTION:A swing plate 10 is swung by a drive shaft 6 to reciprocate a piston 8. A motor 20 is driven by a signal for varying a displacement. The swing plate 10 is rotated by the motor 20 to change a relative positional relation between a groove 14 for a grooved plate 13 an a cylinder 7 with respect to the drive shaft 6. Accordingly, a relative distance between the center of a ball 15a of a connecting rod 15 and the axis of the cylinder 7 is varied to thereby vary a stroke of the piston 8. Thus, the displacement can be controlled to a desired quantity.</p> |
