US 12,485,749 B2
Transmission system including a differential drive device
Pierre Colomb, Cergy Pontoise (FR); and Thierry Lanoe, Cergy Pontoise (FR)
Assigned to VALEO EMBRAYAGES, Amiens (FR)
Appl. No. 18/720,155
Filed by VALEO EMBRAYAGES, Amiens (FR)
PCT Filed Dec. 16, 2022, PCT No. PCT/EP2022/086340
§ 371(c)(1), (2) Date Jun. 14, 2024,
PCT Pub. No. WO2023/111261, PCT Pub. Date Jun. 22, 2023.
Claims priority of application No. 2113771 (FR), filed on Dec. 17, 2021.
Prior Publication US 2025/0042247 A1, Feb. 6, 2025
Int. Cl. F16H 48/34 (2012.01); B60K 17/02 (2006.01); B60K 17/16 (2006.01); F16C 19/10 (2006.01); F16H 48/08 (2006.01); F16H 48/40 (2012.01); F16H 57/04 (2010.01); F16H 48/24 (2006.01)
CPC B60K 17/165 (2013.01) [B60K 17/02 (2013.01); F16C 19/10 (2013.01); F16H 48/08 (2013.01); F16H 48/40 (2013.01); F16H 57/042 (2013.01); F16H 57/0471 (2013.01); F16C 2361/61 (2013.01); F16H 48/24 (2013.01); F16H 48/34 (2013.01); F16H 2048/405 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A transmission system for a motor vehicle, comprising:
a differential drive device which is configured to distribute torque to two half-shafts of an axle of the vehicle, the differential drive device comprising a first element and a second element which are able to move in rotation about an axis X, the first element configured to be driven by a power unit and the second element configured to drive at least one of the two half-shafts, the differential drive device further including a coupling device which comprises a first coupling part which is secured in terms of rotation to the first element, and a second coupling part which is secured in terms of rotation to the second element, the first coupling part configured to move axially with respect to the first element between a coupled position in which the first coupling part is coupled with the second coupling part so as to transmit torque between the first element and the second element, and an uncoupled position in which the first coupling part and the second coupling part are uncoupled from one another and the torque is not transmitted between the first element and the second element, the coupling device further comprising an actuator comprising:
a piston guided in axial translation between a retracted position and an extended position; and
a thrust rolling bearing which is interposed between the piston and the first coupling part so as to transmit an actuating force from the piston to the first coupling part and move the first coupling part from the uncoupled position to the coupled position as the piston moves from the retracted position to the extended position,
wherein the first element comprises a differential case inside which the second coupling part is housed, the first coupling part comprising an interior portion which is housed inside the differential case, an exterior portion which is positioned outside the differential case, and a plurality of connecting portions which axially connect the interior portion and the exterior portion of the first coupling part, each of the connecting portions passing through a corresponding through-opening made in the differential case.