Patent ID: 8727934
Filing Date: 2014-05-20
Classification: F16H

Abstract:
1. A reduction gear, comprising: a stationary sun gear adapted to be integrally attached to a frame, a mobile sun gear which, in relation to the stationary sun gear, is adapted to rotate on itself around a main axis of rotation, with the stationary and mobile sun gears being provided with respective gear teeth, which are coaxial and helical, being centred on the main axis of rotation, and of which the respective numbers of teeth are different from one another, at least one planet gear, which is rotating on itself around a secondary axis of rotation substantially parallel to the main axis of rotation and which is provided with first and second gear teeth which are helical and centred on the secondary axis of rotation and which mesh respectively the gear teeth of the stationary sun gear and the gear teeth of the mobile sun gear, respectively matching the helical gear teeth of the stationary and mobile sun gears, and a planet carrier, which supports the at least one planet gear in a freely rotating manner around the secondary axis of rotation and which is adapted to rotate on itself around the main axis of rotation, wherein the helical gear teeth of the stationary sun gear and the helical gear teeth of the mobile sun gear are reversed in relation to one another and are separated from one another according to the direction of the main axis of rotation, by forming between them a free space for, during the assembly of the reduction gear, adjusting the axial positioning of the at least one planet gear in such a way as to engage the first and second gear teeth of the at least one planet gear with the respective gear teeth of the stationary and mobile sun gears.