| 摘要 |
A revolving yoke load-sensitive displacement-varying mechanism for axial piston hydraulic pump, the mechanism including a housing and a pump shaft with a first transverse opening approximately in a central portion of the pump shaft and a fluid passageway within the pump shaft approximately parallel to a longitudinal axis of the pump shaft. The pump shaft includes means to receive rotary motion from an energy source. The fluid passageway connects a front end of the pump shaft with the first transverse opening and continues beyond the transverse opening into a rear portion of the pump shaft. A swash plate and a yoke are formed as a single member and have a second transverse opening that is substantially coaxial with the first transverse opening. A yoke axis is oriented such that the yoke is stabbed over the pump shaft and the yoke axis is inserted into the first and second transverse openings to enable a partial rotation of the yoke about the yoke shaft. The yoke and yoke axis allow for unobstructed flow of a working fluid in both directions while preventing a loss of the working fluid into an internal space of the housing. The rear portion of the pump shaft includes means to utilize changes of a pressure of the working fluid towards automatic change of an angle of the yoke with respect to a longitudinal axis of the pump shaft.
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