FUEL PUMP

摘要

A fuel pump outside a fuel tank, having an enhanced-durability bearing. The fuel pump includes: a drive shaft; a rotary swash plate fixed to the drive shaft; a cylinder; and a piston biased such that one end thereof abuts against the rotary swash plate and movable inside of the cylinder according to the rotation of the rotary swash plate. The rotary swash plate includes an annular rotary plate that abuts against the piston and a bearing having a drive side first race fixed to the drive shaft, a driven side second race fixed to the annular rotary plate, and a plurality of rolling elements between the first race and the second race. The bearing has an inclination axis inclined with respect to the axis of the drive shaft. A straight line connecting contact points and between the rolling element and the races and is not perpendicular to the inclination axis.

主权项

1. A fuel pump that is provided outside of a fuel tank, for sucking fuel staying in the fuel tank and supplying the fuel to an engine, the fuel pump comprising:
a drive shaft; a rotary swash plate fixed to the drive shaft; a cylinder; and a piston provided in such a manner as to be biased such that one end of the piston abuts against the rotary swash plate and be movable inside of the cylinder according to the rotation of the rotary swash plate, wherein the rotary swash plate includes: an annular rotary plate that abuts against the piston; and a bearing having a drive side first race fixed to the drive shaft, a driven side second race fixed to the annular rotary plate, and a plurality of rolling elements interposed between the first race and the second race, the bearing having an inclination axis-inclined with respect to an axis of the drive shaft, and a straight line connecting contact points between the rolling element and the races not being perpendicular to the inclination axis.