Shaft support structure for belt-type stepless transmission

Abstract

Provided is a shaft support structure for a belt-type stepless transmission, the shaft support structure being configured so that the length of a shaft on which a torque cam is provided can be reduced. A first bearing (36), which supports both a rotating shaft (11) and a torque cam (15) so that the rotating shaft (11) and the torque cam (15) can rotate relative to each other, is provided between the outer peripheral surface of the rotating shaft (11) and the inner peripheral surface of the torque cam (15). A second bearing (42), which rotatably supports one axial end of an output member (16) on a case (31), is provided on the outer peripheral side of the first bearing (36) in the radial direction. A space is formed at a position on the inner peripheral side of the second bearing (42) and on the outer peripheral side of the torque cam (15). A seal member (32) which is fitted to the outer peripheral surface of the torque cam (15) is installed in the space.

Description

technical field [0001] The present invention relates to a shaft support structure in a belt-type continuously variable transmission whose torque transmission capacity changes according to the clamping force clamping the belt, and more particularly to a belt-type continuously variable transmission configured to suppress displacement of the shaft due to a load received from the belt shaft bearing structure. Background technique [0002] Japanese Patent Application Laid-Open No. 2001-330089 describes a belt-type continuously variable transmission configured to generate a thrust force for clamping a belt by a hydraulic actuator. In this belt-type continuously variable transmission, one end portion of the input shaft is formed in a hollow shape, and a rotating shaft integrated with a carrier constituting a front-rear travel switching mechanism is fitted in the hollow portion. Therefore, when the teeth formed on the inner wall surface of the hollow portion mesh with the teeth for...

AI Technical Summary

Problems solved by technology

However, even if the position of the bearing is changed in this way to shorten the distance between the position where the load is applied to the input shaft and the output shaft and the bearing, the deflection deformation of the input shaft and the output shaft will not occur much.

As a result, the length of the portion extending outward from between the bearings in the axial direction becomes longer, and the amount of displacement of this portion in the radial direction may increase.

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