Patent ID: 9080652
Filing Date: 2015-07-14
Classification: F16H

Abstract:
1. A toroidal continuously variable transmission, comprising: a casing; a rotary shaft which is rotatably supported in the casing; a pair of outer discs which is supported at both end portions of the rotary shaft rotatably as being synchronized with the rotary shaft in a state that respective axial-direction one-side surfaces each having an arc-shaped section are mutually opposed; an inner disc which is supported at a periphery of a middle portion of the rotary shaft as being rotatable relatively to the rotary shaft in a state that axial-direction two-side surfaces each having an arc-shaped section are opposed respectively to the axial-direction one-side surfaces of the outer discs; support members which are arranged by two or more respectively between the axial-direction two-side surface of the inner disc and the axial-direction one-side surface of each of the outer discs with respect to the axial direction as being swingable about pivot shafts located at twisted positions relatively to the rotary shaft; and power rollers which are rotatably supported respectively by the support members, each power roller including a peripheral surface as a spherically-shaped convex surface, as having the peripheral surface contacted to the axial-direction two-side surface of the inner disc and the axial-direction one-side surface of each of the outer discs, wherein a small end face of the inner disc is rotatably supported by ball bearings to a fixing member which is fixed to an inner surface of the casing, and a bearing ring of the ball bearing is formed at the small end surface of the inner disc and at least a part of the bearing ring is axially overlapped with a traction surface which is a boundary surface between the power roller and the inner disc.