Patent ID: 6206801
Filing Date: 2001-03-27
Classification: F16H

Abstract:
A continuously variable transmission, comprising a rotary shaft, a first disc supported around an intermediate portion of said rotary shaft for axial movement relative thereto but against rotation relative to said rotary shaft, a second disc supported for rotation relative to said rotary shaft with an inner side thereof opposed to an inner side of said first disc, a trunnion rockable about a pivot axis transverse to said rotary shaft, a power roller mounted to said trunnion and held between the inner sides of said first and second discs, and a loading-cam pressing device operative to rotatively drive said first disc while pressing said first disc toward said second disc,characterized in that a ball spline is formed between an inner peripheral surface of said first disc and an outer peripheral surface of the intermediate portion of said rotary shaft, a restraining device limiting displacement of balls of said ball spline is provided toward an inner axial end of said first disc and include a restraining member mounted to the inner peripheral surface of said first disc, a small-diametered portion is formed on an outer peripheral surface of the intermediate portion of said rotary shaft between said first and second discs, andsaid small-diametered portion and said first are arranged such that said restraining member is mountable to the inner peripheral surface of said first disc by insertion bet ween said small-diametered portion and said inner peripheral surface of said first disc, with a mounting position of said restraining member and said small-diametered portion aligned with each other along an axis of said rotary shaft.