Rotary-to-linear motion converter for electric power steering device, electric power steering device including the same, and vehicle

摘要

PROBLEM TO BE SOLVED: To provide a rotation-linear motion converting device for achieving relatively high quietness.SOLUTION: A rotation-linear motion converting device 20 includes a shaft 7 having a shank 30 whose outer peripheral face is cylindrically shaped, a housing 40 externally fitted to the shaft 7 across a gap, and two rollers 50 arranged in opposition to the shaft 7 at a 180° interval in the peripheral direction and rotatably supported on the housing 40 via a supporting shaft. The two rollers 50 are supported at the same inclination angle α to the axis of the shaft 7 in the torsional direction, and also put in slide contact with the shank 30 of the shaft 7 while applying a preload thereto to enable the transmission of traction driving force.SELECTED DRAWING: Figure 1