Abstract:The cylindrical cam lateral transmission mechanism is a new type of deceleration mechanism,which has greater bearing capacity than the globoidal cam drive mechanism.In order to study the lubrication state of cylindrical cam lateral transmission mechanism in meshing process,according to the HamrockDowson formula,the minimum oil film thickness calculation formula of cylindrical cam lateral transmission mechanism under steady conditions was derived.The formula reflects the main factors affecting the oil film thickness,including the viscositypressure coefficient and dynamic viscosity of lubricating oil under normal pressure and the rotational speed,the radius of cylinder and roller and the circle radius of the driven disc,and the lubrication state of the mechanism can be improved by optimizing the structure and working conditions of the mechanism.The minimum oil film thickness and the film thickness ratio of a cylindrical cam lateral transmission mechanism were calculated with the derived formula,the lubrication state of the mechanism under working condition was analyzed,and the optimization scheme of lubrication state was put forward.