FRICTION ROLLER TYPE SPEED INCREASING GEAR

摘要

PROBLEM TO BE SOLVED: To provide a friction roller type speed-increasing gear which reduces the number of components of the friction roller type speed-increasing gear to inhibit increase of the manufacturing costs.SOLUTION: An output shaft unit 45 includes: a rolling bearing 52 which rotatably supports an output shaft 11; a bearing holder 51 including an inner diameter part, which supports an outer peripheral surface of the rolling bearing 52, and an outer diameter part supported by a shaft holder 43 in a floating manner; a seal housing 57 which is fitted from one axial end side of the bearing holder 51 to a friction roller 15 side along an axial direction and fixes an end surface of the rolling bearing 52; and a preload spring 71 which is disposed at the other axial end side in the bearing holder 51 and biases the rolling bearing 52 to the seal housing 57 side.SELECTED DRAWING: Figure 1