PUMP APPARATUS, CHARGE RELIEF MECHANISM AND HYDRAULIC CONTROL MECHANISM

摘要

PROBLEM TO BE SOLVED: To prevent leak of operating fluid as much as possible from a hydraulic pump body driven by one pump shaft connected to a driving source to be operated.;SOLUTION: This pump apparatus includes: a plurality of hydraulic pump bodies juxtaposed; a plurality of pump shafts for driving the plurality of hydraulic pump bodies, respectively; a power transmission mechanism connecting the plurality of pump shafts to be operated; and a case body, which is a case body storing a plurality of hydraulic pump bodies and the power transmission mechanism and supporting the plurality of pump shafts to freely rotate around the axis, wherein the case body includes a center section provided with an oil supply and discharge passage formed for the plurality of hydraulic pump bodies. One pump shaft of the plurality of pump shafts is extended outward from the case body so that one end part forms an input end part connected to a driving source to be oerated, and one pump shaft is supported directly or indirectly on the case body through a bearing member having a plurality of areas rather closer to the input end part.;COPYRIGHT: (C)2006,JPO&NCIPI