ROTATION SUPPORT DEVICE FOR PINION SHAFT

摘要

Provided is a rotation support device for a pinion shaft, said device having a structure whereby it is possible to ensure that a rolling bearing on the opposite side from a pinion gear has sufficient axial rigidity while reducing the dynamic torque during operation and the starting torque upon operation startup. A single-row angular contact ball bearing (14a) is used as the rolling bearing on the opposite side from the pinion gear. The ratio (Ro/Bd) between the radius of curvature (Ro) of the outer race track (22a) and the diameter (Bd) of each ball (25a) is adjusted to be within the range of 0.52