| 摘要 |
<p>PURPOSE:To convert the discharge amount of pump by controlling the coupling angle between two cams by a pin projectionally provided to an operating shaft fitted into one of two cams constituting the piston-driving cam of a radial piston type oil-pressure pump. CONSTITUTION:The pin 6 provided projectionally to the operating shaft 5 moves in a sliding manner in the guide hole 4 of the first cam 2, and also the pin 6 and the operating shaft 5 move to the right while turning in the circumferential direction because the guide hole 4 is distorted at a fixed angle alpha in the circumferential direction. Since the pin 6 projects from the guide hole 4 and fits slidably in the axial direction into the longitudinal groove 8 of the second cam 7, the second cam 7 is turned through as much as an angle theta in the circumferential direction as it moves. Since the second cam 7 is fitted with an eccentricity of as much as M, the center C is moved by C' as the second cam rotates and the eccentricity N from the rotating center A is changed to N'. If N'>N is set in advance, the eccentricity can be made larger and the discharge amount of the pump can be increased by turning second cam 7 by the operating shaft 5.</p> |
