NON-STAGE TRANSMISSION

PROBLEM TO BE SOLVED: To provide a non-stage transmission having strength which matches with torque fluctuations associated with the operation strokes of an internal combustion engine, and capable of achieving downsizing and lightening or cost reduction.SOLUTION: A non-stage transmission comprises: an input shaft to which driving force is transmitted from an internal combustion engine having plural cylinders; an output shaft; plural lever crank mechanisms each having an eccentric mechanism which has a cam disc eccentric to the input shaft and a rotary disc rotating eccentrically to the cam disc, and a swing link pivotally supported on the output shaft, and converting a rotary motion of the input shaft to swing motions of the swing links; and a mechanism for preventing unidirectional rotation of the swing links relative to the output shaft. The cam discs of the respective eccentric mechanisms are arranged eccentrically at every predetermined angle in the circumferential direction of the input shaft, and when setting a rotation angle position of the input shaft at the time point of passing over the top dead center in a stroke from a compression stroke to an expansion stroke in each cylinder as a reference position, a rotation angle difference between the reference positions of the respective cylinders whose orders of combustion are adjacent is different from a predetermined angle. At least one of the lever crank mechanisms is different from the other in strength against the driving force from the internal combustion engine.SELECTED DRAWING: Figure 9 【課題】内燃機関の動作行程に伴うトルク変動に応じた強度を有する、小型軽量化又は低コスト化を実現可能な無段変速機を提供する。【解決手段】無段変速機は、複数の気筒を有する内燃機関からの駆動力が伝達される入力軸と、出力軸と、入力軸に偏心したカムディスク及びカムディスクに偏心して回転する回転ディスクを有する偏心機構と、出力軸に軸支された揺動リンクとを有し、入力軸の回転運動を揺動リンクの揺動運動に変換する複数のてこクランク機構と、出力軸に対する揺動リンクの一方向回転阻止機構とを備える。各偏心機構のカムディスクは、入力軸の周方向における所定角度毎に偏心して配置され、各気筒での圧縮行程から膨張行程に至る行程での上死点を越えた時点での入力軸の回転角度位置を基準位置としたとき、燃焼順序の隣り合う各気筒の基準位置間の回転角度差が所定角度と異なる。てこクランク機構の少なくとも一つは、内燃機関からの駆動力に対する強度が他と異なる。【選択図】図９