Patent ID: 8387475
Filing Date: 2013-03-05
Classification: B62M,F16H,Y10T

Abstract:
1. A continuously variable transmission, comprising: an input shaft and an output shaft arranged in an axle seat of an external support; a drive wheel acting as a primary wheel in round shape, which has its center hole as an axle hole for mounting the input shaft, and an annular recess arranged near its periphery; a chain wheel acting as a driven wheel, which has its center hole as an axle hole for mounting the output shaft; an endless sleeve consisting of an endless sleeve portion and a handle portion extending outwardly from one end of the endless sleeve portion, wherein the endless sleeve portion has an annular groove arranged on its inner circumferential surface, and a projecting lug protruding outwardly from an upper portion of its outer circumferential surface, and a fore part of the handle portion is provided with a mounting hole capable of rotatably connection with the output shaft when the endless sleeve swings; a ring wheel which is an annular chain wheel having on its outer peripheral surface a toothed portion with a relatively large diameter convex intermediate section and a relatively recessed supporting step having its both laterals with a diameter smaller than a root circle diameter of its toothed portion, and a plurality of perforated bulges being evenly distributed on its inner peripheral surface; wherein the ring wheel is mounted in the endless sleeve portion of the endless sleeve and has its toothed portion inserted into the annular groove of the endless sleeve portion of the endless sleeve; while the supporting step is in rolling contact with top surfaces of both lateral walls of the annular groove; and the ring wheel is concentrically arranged with the drive wheel and movable with respect to the drive wheel such that its axle center and axle center of the drive wheel establish an eccentric spread of axles that is adjustable within a specific range; at least one linking member having the number corresponding to the number of the bulges of the ring wheel, each linking member comprising a head portion and a linking portion, wherein the head portion has an intermediate cylindrical portion and two circular shafts located at its both ends; and the linking portion extends radially from the intermediate cylindrical portion of the head portion and has an aperture at its free end; at least two wedge teeth having the number in relation to the number of the circular shafts of the linking member, two wedge teeth being mounted on each linking member; wherein each wedge tooth consists of first and second wedges of hinge type with circular-arc-shaped top surfaces and is muff-coupled with one circular shaft of the head portion of the linking member; when the wedge teeth are mounted on the circular shafts, each linking member is rotatably mounted in the annular recess of the drive wheel via a bearing, and the linking portion of each linking member has its free end articulated with the bulges of respective ring wheel via a pintle, and the first and second wedges are expanded by a resilient member, such that the circular-arc-shaped top surfaces and inner walls of the annular recess of the drive wheel create a reverse frictional contact when the drive wheel rotates; a chain mounted on chain teeth of the ring wheel and the chain wheel in an enclosing manner for driving rotation of the output shaft.