US 12,241,533 B2
Differential drive system, more particularly for use in a power train of a motor vehicle
Roël Verhoog, Cergy-Pontoise (FR); Herve Maurel, Cergy-Pontoise (FR); and Jerome Boulet, Cergy-Pontoise (FR)
Assigned to VALEO EMBRAYAGES, Amiens (FR)
Appl. No. 18/250,661
Filed by VALEO EMBRAYAGES, Amiens (FR)
PCT Filed Oct. 27, 2021, PCT No. PCT/EP2021/079855
§ 371(c)(1), (2) Date Apr. 26, 2023,
PCT Pub. No. WO2022/090328, PCT Pub. Date May 5, 2022.
Claims priority of application No. 2011009 (FR), filed on Oct. 27, 2020.
Prior Publication US 2023/0417310 A1, Dec. 28, 2023
Int. Cl. F16H 48/24 (2006.01); B60K 17/35 (2006.01); F16D 11/14 (2006.01); F16D 28/00 (2006.01); F16H 48/08 (2006.01); F16H 48/34 (2012.01); F16H 48/40 (2012.01); F16D 11/00 (2006.01)
CPC F16H 48/08 (2013.01) [B60K 17/352 (2013.01); F16D 11/14 (2013.01); F16D 28/00 (2013.01); F16H 48/24 (2013.01); F16H 48/34 (2013.01); F16H 48/40 (2013.01); F16D 2011/008 (2013.01); F16H 2048/346 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A differential drive system for a vehicle, comprising:
a differential drive device comprising a differential casing housing a differential gearset, the differential gearset being able to transmit torque from the differential casing to a first output side shaft and a second output side shaft which each drive a wheel of the vehicle, the first output side shaft and the second output side shaft extending along an axis of rotation X,
a dog clutch device comprising a first coupling member and a second coupling member, the second coupling member being able to be rotationally driven about the axis of rotation X and being able to move axially along the axis of rotation X with respect to the first coupling member so as to engage with the first coupling member or disengage therefrom, the first coupling member being formed by a toothed torque-transmission member of the differential drive device,
an electromagnetic actuator comprising an annular electromagnet able to generate a magnetic field to move a mobile element between a first position associated with the engaged state of the dog clutch device, and a second position associated with the disengaged state of the dog clutch device,
wherein the axis of rotation X is situated outside of the annular electromagnet of the electromagnetic actuator, and the differential drive system further comprises a force-transfer mechanism designed to transfer the forces of actuation of the mobile element of the electromagnetic actuator to the second coupling member of the dog clutch device,
wherein the force-transfer mechanism comprises a pressure plate mounted to slide axially on the differential casing,
wherein the differential casing forms a torque input member of the differential drive device and the differential drive device further comprises a first output member able to be coupled to the first output side shaft, and a second output member able to be coupled to the second output side shaft,
wherein the differential drive system is provided with a disconnection mechanism configured to interrupt the transmission of torque between the differential casing and the differential gearset when the dog clutch device is open,
wherein the first coupling member is radially encompassed by the differential casing, and
wherein the first coupling member forms an auxiliary input member of the differential drive device, the differential gearset being configured to transmit torque between the auxiliary input member and the first and second output members of the differential drive device, the auxiliary input member being mounted with the freedom to rotate with respect to the differential casing and being secured in terms of rotation to the differential casing only when the dog clutch device is closed.