Development of combined-type continuous variable transmission with quadric crank chains, one-way clutches and solid-cams

在本研究中，我们开发了一种新型的无级变速器(L-无级变速器)。提出的L无级变速器由两个二次曲柄链条、单向离合器和实体凸轮组成。机构中对称放置两条相同的二次曲柄链条。由于所提出的机构不是基于摩擦传导，它提供了一种无噪音、经久耐用、传动效率高的机构，设计了一种与连杆长度响应相对应的平板凸轮来实现CVT的功能。然后，将盘形凸轮安装到L无级变速器样机上。为此，我们设计了一种带有盘形凸轮的L无级变速器，该盘形凸轮机构可以机械地实现盘形凸轮和曲柄凸轮的旋转同步。最后，通过数值模拟验证了L无级变速器的工作特性。

In this study, we have developed a new type of continuously variable transmission (L-CVT). The proposed L-CVT consists of a couple of quadric crank chains, one-way clutches and solid-cams. Two identical quadric crank chains are placed symmetrically in the mechanism. Since the proposed mechanism is not based on friction conduction, it provides a mechanism that creates no noise, is durable, and offers high transmission efficiency.We have designed a plate cam which corresponds to the response of the length of a connecting rod to realize the function of CVT. Then, we installed the plate cam to the L-CVT prototype model. Thus, we have designed a L-CVT with a plate cam in which the synchronization between the rotation of the plate cam and the one of the crank can be taken mechanically. Finally, the behavior of the L-CVT has been confirmed by numerical simulations.