Patent ID: 6109900
Filing Date: 2000-08-29
Classification: F04C

Abstract:
A hydraulic pump, comprising:a pump body formed with a bearing hole passing through the pump body;a pump cover;a hydraulic pump unit encased between the pump body and the pump cover;a drive shaft, inserted into the bearing hole, for driving the hydraulic pump unit;a bearing bush, inserted into the bearing hole, for supporting the drive shaft;a seal member encased in a seal chamber formed at an end portion of the bearing hole; andan oil groove, formed in the bearing hole, for connecting a hydraulic pump unit's side with the seal chamber and for carrying hydraulic oil for lubrication;wherein a sectional area of the oil groove is greater on a seal chamber's side than on the hydraulic pump unit's side, andwherein the bearing bush comprises a plurality of bush pieces arranged at a predetermined interval in an axial direction of the bearing hole.