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1. WO2020198860 - ENSEMBLE EMBRAYAGE ÉLECTRONIQUE ROTATIF PROCURANT QUATRE MODES DE FONCTIONNEMENT

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

CLAIMS

What is claimed:

1. A bi-directional clutch assembly for use in motor vehicles to provide a rotary disconnect feature between a pair of rotary components, the bi-directional clutch assembly comprising:

a rotary input member;

a rotary output member;

an outer race fixed for rotation with one of the input and output members and defining first and second strut pockets;

an inner race fixed for rotation with the other one of the input and output members and defining ratchet teeth;

a first selectable one-way clutch (SOWC) having a first coil unit fixed to a stationary member, a first active strut supported in the first strut pocket for pivotal movement between a non-deployed position disengaged from the ratchet teeth and a deployed position engaged with the first ratchet teeth, and at least a portion of a first armature fixed for rotation with the outer race and being axially moveable between a non-actuated position and an actuated position in response to energization of the first coil unit, and a first strut engagement feature extending from the first armature and configured to move the first active strut from its deployed position to its non-deployed position in response to movement of the first armature form its non-actuated position to its actuated position; and

a second selectable one-way clutch (SOWC) having a second coil unit fixed to the stationary member, a second active strut supported in the second strut pocket for pivotal movement between a non-deployed position disengaged from the second ratchet teeth and a

deployed position engaged with the second ratchet teeth, and at least a portion of a second armature fixed for rotation with the outer race and being axially moveable between a non-actuated position and an actuated position in response to energization of the second coil unit, and a second strut engagement feature extending from the second armature and configured to move the second active strut from its deployed position to its non-deployed position in response to movement of the second armature from its non-actuated position to its actuated position.

2. The bi-directional clutch assembly of Claim 1 wherein the first strut pocket is formed in a first face surface of the outer race and the second strut pocket is formed in a second face surface of the outer race.

3. The bi-directional clutch assembly of Claim 2 wherein the ratchet teeth include first ratchet teeth formed on a first clutch ring segment extending from the inner race and second ratchet teeth formed on a second clutch ring segment extending from the inner race, and wherein the first active strut is supported in the first strut pocket in alignment with the first clutch ring segment while the second active strut is supported in the second strut pocket in alignment with the second clutch ring segment.

4. The bi-directional clutch assembly of Claim 1 establishing a LOCK-LOCK mode when both the first and second coil units are in a non-energized state, establishing a FREEWHEEL mode when both the first and second coil units are in an energized state, establishing a LOCK-RATCHET mode when the first coil unit is in its non-energized state and

the second coil unit is in its energized state, and establishing a RATCHET-LOCK mode when the first coil unit is in its energized state and the second coil unit is in its non-energized state.

5. The bi-directional clutch assembly of Claim 1 wherein the first SOWC further includes a first strut spring supported in a first spring pocket formed in the outer race and operable to normally bias the first active strut toward its deployed position, and wherein the second SOWC further includes a second strut spring supported in a second spring pocket formed in the outer race and operable to normally bias the second active strut toward its deployed position.

6. The bi-directional clutch assembly of Claim 1 wherein the first strut pocket is formed in a first face surface of the outer race and the second strut pocket is formed in a second face surface of the outer race, and wherein the ratchet teeth include first ratchet teeth formed on a first clutch ring segment of the inner race and second ratchet teeth formed on a second clutch ring segment of the inner race.

7. The bi-directional clutch assembly of Claim 1, wherein the first armature includes a first base portion and a first actuator plate, and the second armature includes a second base portion and a second actuator plate, wherein the first and second actuator plates are the portions of the first and second armatures that are fixed for rotation with the outer race, and the first and second base portions are fixed relative to the first and second coil units.

8. The bi-directional clutch assembly of Claim 7, wherein a first coupling interface is established between the outer race and one or more lugs of the first actuator plate so as to couple the first actuator plate for rotation with the outer race while allowing bi-directional axial movement of the first actuator plate relative to the outer race between its non-actuated and actuated positions, and wherein a first armature biasing arrangement is operable to normally bias the first actuator plate toward its non-actuated position, and wherein a second coupling interface is established between the outer race and one or more lugs of the second actuator plate so as to couple the second actuator plate for rotation with the outer race while permitting bi-directional axial movement of the second actuator plate relative to the outer race between its non-actuated and actuated positions, and wherein a second armature biasing arrangement is operable to normally bias the second actuator plate toward its non-actuated position.

9. The bi-directional clutch assembly of Claim 8 wherein the first coil unit is aligned to surround the first actuator plate, and wherein the second coil unit is aligned to surround the second actuator plate.

10. The bi-directional clutch assembly of Claim 9 wherein the first and second base portions each include a magnetic portion and a non-magnetic portion.

11. The bi-directional clutch assembly of Claim 1 configured to provide a disconnect between an electric motor driving the input member and a geartrain driven by the output member.

12. The bi-directional clutch assembly of Claim 11 wherein the electric motor and geartrain are part of an electric transaxle or an electric drive axle.

13. A bi-directional clutch assembly comprising:

a first rotary member;

a second rotary member;

an inner race fixed for rotation with the first rotary member and defining ratchet teeth;

an outer race fixed for rotation with the second rotary member;

a first selectable one-way clutch (SOWC) having a first coil unit fixed to a stationary member, a first active strut mounted to the outer race and supported for pivotal movement between a non-deployed position disengaged from the ratchet teeth and a deployed position engaged with the ratchet teeth, and an axially shiftable first actuator fixed for rotation with the outer race and being axially moveable between a non-actuated position and an actuated position in response to energization of the first coil unit, and a first strut engagement feature extending from the first actuator and configured to move the first active strut from its deployed position to its non-deployed position in response to movement of the first actuator form its non-actuated position to its actuated position; and

a second selectable one-way clutch (SOWC) having a second coil unit fixed to the stationary member, a second active strut mounted to the outer race and supported for pivotal movement between a non-deployed position disengaged from the ratchet teeth and a deployed position engaged with the ratchet teeth, and an axially shiftable second actuator fixed for rotation with the outer race and being axially moveable between a non-actuated position and an actuated position in response to energization of the second coil unit, and a second strut engagement feature extending from the second actuator and configured to move the second active strut from its deployed position to its non-deployed position in response to movement of the second actuator from its non-actuated position to its actuated position.

14. The bi-directional clutch of claim 13, wherein the first actuator is a first actuator plate, the first actuator plate being disposed within a first base portion, wherein the first base portion is fixed relative to the first coil unit, and the first actuator plate is rotatable relative to the first base portion, and wherein the second actuator is a second actuator plate, the second actuator plate being disposed within a second base portion, wherein the second base portion is fixed relative to the second coil unit, and the second actuator plate is rotatable relative to the second base portion.

15. The bi-directional clutch of claim 13, wherein the first and second engagement features are in the form of a dowel and the first and second active struts include a ramped surface, wherein the dowel moves axially and contacts the ramped surface to move the first or second active strut to the non-deployed position.

16. A method of controlling a bi-directional clutch assembly, the method comprising the steps of:

rotating a first rotary member;

selectively transferring torque from the first rotary member to a second rotary member;

wherein an inner race is fixed for rotation with the first rotary member and defines ratchet teeth;

wherein an outer race is fixed for rotation with the second rotary member;

energizing a first coil unit fixed to a stationary member;

axially shifting a first actuator fixed for rotation with the outer race between a non-actuated position and an actuated position in response to energization of the first coil unit, the first actuator having a first strut engagement feature projecting therefrom;

in response to shifting the first actuator to the actuated position, contacting a first active strut with the first strut engagement feature, wherein the first active strut is mounted to the outer race and supported for pivotal movement between a non-deployed position disengaged from the ratchet teeth and a deployed position engaged with the ratchet teeth;

in response to contacting the first active strut with the first strut engagement feature, pivoting the first active strut from its deployed position to its non-deployed position;

energizing a second coil unit fixed to a stationary member;

axially shifting a second actuator fixed for rotation with the outer race between a non-actuated position and an actuated position in response to energization of the second coil unit, the second actuator having a second strut engagement feature projecting therefrom;

in response to shifting the second actuator to the actuated position, contacting a second active strut with the second strut engagement feature, wherein the second active strut is mounted to the outer race and supported for pivotal movement between a non-deployed position disengaged from the ratchet teeth and a deployed position engaged with the ratchet teeth;

in response to contacting the second active strut with the second strut engagement feature, pivoting the second active strut from its deployed position to its non-deployed position; wherein the first and second rotary members are rotationally decoupled when the first and second active struts are in the non-deployed position;

wherein the first and second rotary members transfer torque in a first rotary direction when one of the first and second active struts are in the deployed position and the other of the first and second active struts are in the non-deployed position;

wherein the first and second rotary members transfer torque in the first rotary direction and a second rotary direction when both the first and second active struts are in the deployed position.

17. The method of claim 16, wherein the first and second actuator is an actuator plate of an armature, wherein the armature further comprises a base portion, wherein the actuator plates rotate relative to the base portions, wherein the base portions are fixed relative to the coil units.

18. The method of claim 16, wherein the first and second active struts include a ramp surface, wherein the strut engagement features contact the ramp surfaces to pivot the first and second active struts.

19. The method of claim 16, wherein the first and second active struts are biased toward the deployed position.

20. The method of claim 16, wherein the first and second actuators are biased toward the non-actuated position.