The present invention relates to a continuously variable transmission for a bicycle. The continuously variable transmission for a bicycle of the present invention comprises: a rotary shaft; a variable pulley installed on the rotary shaft and including a tilt belt groove with a width gradually increasing from a central part of the variable pulley toward an outer peripheral part of the variable pulley, wherein the variable pulley is separated into a pair of right and left pulleys and the width of the tilt belt groove is changed in accordance with an interval between the right and left pulleys; a pulley changing unit which changes the interval between the right and left pulleys in accordance with a rotary force and a load applied to the rotary shaft and the variable pulley; and a chain belt inserted into the tilt belt groove in the variable pulley of which rotary radius is changed in the variable pulley by displacement of an insertion position in accordance with a change in the width of the tilt belt groove. Therefore, the automatic transmission is smoothly performed and a power is efficiently transmitted. Moreover, the invention can be easily manufactured since it has a simple structure.
본 발명은 자전거 무단변속장치에 관한 것으로서, 회전축과, 상기 회전축에 설치되며, 외주부쪽으로 폭이 점증하는 형태의 경사벨트홈이 형성되되, 좌우 한쌍의 풀리체로 분리되어 상호간의 이격간격에 따라 상기 경사벨트홈의 폭이 가변되는 가변풀리와, 상기 회전축과 가변풀리에 가해지는 회전력과 부하에 따라 상기 한쌍의 풀리체 상호간의 이격간격을 변경시키는 풀리가변수단과, 상기 가변풀리의 경사벨트홈에 끼워지되, 경사벨트홈의 폭 가변에 따라 끼움위치가 변위되면서 가변풀리에서의 회전반경이 변경되는 체인벨트를 포함한다. 이러한 본 발명에 따르면, 원활한 자동변속과 효율적인 동력전달이 가능하면서 구조가 간단하여 제조 또한 용이한 기술적 장점이 있다.
Gearless trans device for bicycle
자전거 무단변속장치
2016-11-21
Patent
Electronic Resource
Korean
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