Monostable coupling system and torque transmission device for a motor vehicle

Patent metadata

Field	Value
Publication number	US-11906000-B2
Application number	US-202017782806-A
Country	US
Kind code	B2
Filing date	Dec 4, 2020
Priority date	Dec 6, 2019
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

A coupling system for a torque transmission device of a motor vehicle includes a sliding sleeve. An actuator including a mobile member movable between a rest position and an activated position is linked to the sliding sleeve by a rotating kinematic link and by an elastic return member fixed in rotation about the axis of revolution. The mobile member is capable, by means of the kinematic link, of driving the sliding sleeve from the retracted position to the coupling position and of loading the elastic return member by passing from the rest position to the activated position. The elastic return member is able, while unloading, by means of the kinematic link, to return the mobile member from the activated position to the rest position and the sliding sleeve from the coupling position to the retracted position.

First claim

The invention claimed is:

1. A coupling system comprising:
a first engagement interface able to rotate about an axis of revolution in a fixed frame of reference, and a second engagement interface able to rotate about the axis of revolution in the fixed frame of reference and relative to the first engagement interface;
a sliding sleeve including an intermediate engagement interface engaged with one of the first and second engagement interfaces, the sliding sleeve being capable of moving, by translation parallel to the axis of revolution, from a retracted position in which the intermediate engagement interface is not engaged with the other of the first and second engagement interfaces to a coupling position in which the intermediate engagement interface is engaged with one and the other of the first and second engagement interfaces and produces a rotational coupling between the first engagement interface and the second engagement interface;
an actuator comprising a fixed support in the fixed frame of reference and a mobile member, the mobile member being movable in translation parallel to the axis of revolution between a rest position and an activated position; and
a rotating kinematic link between the mobile member and the sliding sleeve, having a degree of freedom of rotation about the axis of revolution;
wherein the actuator comprises an elastic return member fixed in rotation about the axis of revolution in the fixed frame of reference, the mobile member being capable, by means of the kinematic link, of driving the sliding sleeve from the retracted position to the coupling position and of loading the elastic return member by passing from the rest position to the activated position, the elastic return member being able, while unloading, to return, by means of the kinematic link, the mobile member from the activated position to the rest position and the sliding sleeve from the coupling position to the retracted position,
wherein one end of the elastic return member bears against a support secured to the fixed support, and
wherein the fixed support comprises a body having a front face facing axially toward the second engagement interface, and rods project axially from this front face, each rod comprising a head on which the support is foil led, the elastic return member comprising springs gripped axially between the heads and the kinematic link.

2. The coupling system as claimed in claim 1 , in which the mobile member is fixed in rotation about the axis of revolution in the fixed frame of reference.

3. The coupling system as claimed in claim 2 , wherein one end of the elastic return member bears against a support secured to the fixed support.

4. The coupling system as claimed in claim 2 , wherein the kinematic link comprises an intermediate push rod between the mobile member and the elastic return member.

5. The coupling system as claimed in claim 2 , wherein the mobile member comprises an annular piston capable of sliding axially in a variable-volume annular chamber of the fixed support, connected to a hydraulic supply line.

6. The coupling system as claimed in claim 2 , wherein the coupling system includes, interposed axially between the first engagement interface and the second engagement interface, a synchronizer including at least one synchronizing ring, the sliding sleeve in the retracted position not driving the synchronizing ring, the sliding sleeve being capable, when moving during an axial translation from the retracted position to the coupling position, of passing through an intermediate synchronizing position in which the intermediate engagement interface is engaged in a synchronizing engagement interface of the synchronizing ring and produces a rotational coupling between the first engagement interface and the synchronizing ring, the synchronizing ring being capable of rotating relative to the second engagement interface about the axis of revolution, generating, by friction, torque for driving the second engagement interface.

7. The coupling system as claimed in claim 1 , wherein the kinematic link comprises an intermediate push rod between the mobile member and the elastic return member.

8. The coupling system as claimed in claim 7 , wherein the push rod is fixed in rotation about the axis of revolution, bearing axially against the mobile member and against the elastic return member.

9. The coupling system as claimed in claim 8 , wherein the push rod is linked to the sliding sleeve by a rotational guide or a pivot connection about the axis of revolution.

10. The coupling system as claimed in claim 7 , wherein the push rod is linked to the sliding sleeve by a rotational guide or a pivot connection about the axis of revolution.

11. The coupling system as claimed in claim 10 , wherein the rotational guide or the pivot connection comprises at least one annular pad, the annular pad being positioned at least partially between two opposite walls of the sliding sleeve.

12. The coupling system as claimed in claim 11 , wherein the annular pad is positioned at least partially between two opposite walls of the push rod.

13. The coupling system as claimed in claim 1 , wherein the kinematic link comprises an intermediate push rod between the mobile member and the elastic return member, and the push rod comprises a collar against which the springs bear, in which collar are formed openings, the rods passing through these openings so that the rods axially guide the push rod.

14. The coupling system as claimed in claim 1 , wherein the mobile member comprises an annular piston capable of sliding axially in a variable-volume annular chamber of the fixed support, connected to a hydraulic supply line.

15. The coupling system as claimed in claim 1 , wherein the coupling system includes, interposed axially between the first engagement interface and the second engagement interface, a synchronizer including at least one synchronizing ring, the sliding sleeve in the retracted position not driving the synchronizing ring, the sliding sleeve being capable, when moving during an axial translation from the retracted position to the coupling position, of passing through an intermediate synchronizing position in which the intermediate engagement interface is engaged in a synchronizing engagement interface of the synchronizing ring and produces a rotational coupling between the first engagement interface and the synchronizing ring, the synchronizing ring being capable of rotating relative to the second engagement interface about the axis of revolution, generating, by friction, torque for driving the second engagement interface.

16. The coupling system as claimed in claim 1 , wherein the coupling system comprises:
a transmission shaft capable of rotating about the axis of revolution, the first engagement interface being secured to the transmission shaft, and
an idle transmission wheel capable of rotating relative to the transmission shaft about the axis of revolution, the second engagement interface being secured to the idle transmission wheel.

17. The coupling system as claimed in claim 1 , wherein the kinematic link comprises an intermediate push rod between the mobile member and the elastic return member.

18. A torque transmission device for a motor vehicle comprising at least one motor, the transmission device comprising:
a first input element and a second input element,
a coupling system that includes:
a first engagement interface able to rotate about an axis of revolution in a fixed frame of reference, and a second engagement interface able to rotate about the axis of revolution

Assignees

• Valeo Embrayages

Inventors

• Maurel Hervé

Classifications

• F16D23/06 Primary

  and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation · CPC title

• F16D2023/0631

  Sliding sleeves; Details thereof · CPC title

• F16D2023/0656

  Details of the tooth structure; Arrangements of teeth · CPC title

• Y02T10/62

  Hybrid vehicles · CPC title