Actuation device for a transmission system

#The present invention relates to the field of actuation devices for transmission systems.

#The actuation device is for example inserted into a speed reducer transmission system comprising at its output a differential intended to transmit and distribute torque originating from a rotary electric machine to two half-shafts of an axle of a motor vehicle. The differential may contain a disconnection device interposed between the output of the speed reducer and the wheel of the vehicle in order to disconnect the transmission system from the wheels of the vehicle. This disconnection may be beneficial in terms of energy efficiency when it is not necessary to supply torque to the wheels of the vehicle.

#WO21115374 A1 discloses a differential transmission system comprising a differential casing that is rotatable about a first axis and provided with a toothed wheel driven by a power unit of the vehicle. Housed inside the casing are a supporting ring guided in rotation in the casing, two planet pinions rotatably mounted on the supporting ring about a second axis perpendicular to the first axis, and two sun gears, each of which meshes with the two planet pinions and each of which is rigidly connected to a half-shaft for rotation therewith. Used on a motor vehicle, the differential transmission system makes it possible for the driving wheels to rotate a different speeds on a bend: the wheels situated on the outside of the bend rotate more quickly than those situated on the inside.

#Further features, details and advantages of the invention will become more clearly apparent from reading the following description, and from studying exemplary embodiments given by way of non-limiting illustration, with reference to the appended drawings, in which:

#FIG. 1 is an isometric view of a module provided with its actuation device according to a first embodiment of the invention;

#FIG. 2 is a cross-sectional view showing the assembly of the actuation module according to the first embodiment in FIG. 1 on a transmission system;

#The features, variants and different embodiments of the invention may be associated with one another in various combinations, provided that they are not mutually incompatible or mutually exclusive.

#In the figures, elements common to several figures have the same reference sign.

#In the description and the claims, the terms “external” and “internal” and the orientations “axial” and “radial” will be used to denote elements of the transmission system according to the definitions given in the description. By convention, the “radial” orientation is orthogonal to the main axis of rotation X of the transmission system determining the “axial” orientation and, from the inside to the outside moving away from said axis, the “circumferential” orientation is orthogonal to the main axis X and orthogonal to the radial direction.