Patent ID: 6676554
Filing Date: 2004-01-13
Classification: B62M,H02K

Abstract:
An electrically powered actuator for a bicycle component, the actuator comprising:a casing, an electric motor with a housing and an output shaft, a driven shaft rotationally mounted in said casing and connected to the output shaft of the electrical motor by means of a reducer, and an angular position sensor for detecting and signaling the angular position of said driven shaft, wherein said sensor is a rotary potentiometer associated with said driven shaft inside said casing, wherein the reducer is an epicyclic reduction gear, comprising an internal gear rigidly connected to the housing of the motor, a sun gear connected to the output shaft of the motor coaxially inside the internal sear and a sear set holder rotationally connected to the driven shaft and holding at least one satellite gear freely turning on an axis distanced from the common axis of the sun gear and internal gear, said satellite gear meshing with both the sun gear and the internal gear, wherein the driven shaft is rotationally mounted in a tubular casing projecting from an end of the motor body, wherein the driven shaft is rotationally mounted on at least one thrust ball bearing.