BALL SCREW DEFLECTOR

摘要

In an electric power steering system, there is provided a ball screw deflector configured to make it possible to easily measure the whole length of each of deflector pieces. A mating face of each of the deflector pieces and end faces of the deflector pieces are parallel to each other, and have an angle corresponding to a lead angle of a ball screw portion. Thus, it is possible to reduce the amount of material required to form each of the deflector piece pieces. In addition, it is possible to easily measure the overall length of each of the deflector pieces with the use of measuring equipment such as a vernier caliper.

主权项

1. A ball screw deflector comprising:
a plurality of deflector pieces; wherein: the deflector circulates balls that roll between a ball screw portion fanned on an outer periphery of a linear-motion shaft and a ball screw nut disposed around the ball screw portion; the deflector is disposed at an outer peripheral face side of the ball screw nut; the deflector is formed by assembling together the deflector pieces having shapes obtained by splitting the deflector at intermediate positions of the deflector in an axial direction of the linear-motion shaft; and a mating face of each of the deflector pieces and an end face of each of the deflector pieces, the end face being located on an opposite side of the deflector piece from the mating face, are parallel to each other and have an angle corresponding to a lead angle of the ball screw portion.