Patent ID: 6098479
Filing Date: 2000-08-08
Classification: B60T,F16D,F16H,H02K,Y10T

Abstract:
Device for the conversion of a rotational movement in a translational movement, comprised of:a first internally threaded ring wheel;a second ring wheel having a pitchless internal surface; anda roller drive unit with at least one planet roller rolling within said first internally threaded ring wheel, wherein said at least one planet roller at least in a first section exhibits an outer threading and in a second section at least a pitchless circumscribing working surface, whereby during the orbiting of the planet roller its outer threading rolls upon the inner threading of said first ring wheel and wherein at the same time its pitchless circumscribing working surface rolls upon the pitchless internal circumscribing working surface of said second ring wheel, wherein the relationship between the working circle diameter of the outer threading of the planet roller and the working circle diameter of the internal threading of the ring wheel is not the same as the thread start relationship between the outer threading of the planet roller and the inner threading of the ring wheel, resulting in an axial relative movement between the planet roller and the internally threaded ring wheel during the rolling process.