Patent ID: 7156765

Claim:
A lubricating mechanism of an oil pump, comprising: a drive shaft disposed in parallel to an input shaft; a first bearing for rotatably supporting the drive shaft; a rotor which is fixed on one side in an axial direction of the drive shaft for pressurizing lubricant in a suction side oil chamber and feeding the lubricant to a discharge side oil chamber; and a thrust bearing having a sliding face for rotatably supporting the other side in the axial direction of the drive shaft, a rotation of the input shaft being accelerated and transmitted to the drive shaft, wherein: a bearing holding portion is provided for supporting a second bearing, from outside thereof, disposed inward of the sliding face along a radial direction of the input shaft; an oil sump is provided in the bearing holding portion so as to protrude in the axial direction from an end portion of the second bearing so that lubricant supplied from the input shaft side is introduced to the second bearing; and a cutout portion is provided in the oil sump such that part of the lubricant supplied from the oil sump to the second bearing is supplied to the sliding face through the cutout portion.