Wedge clutch with slotted carrier

Patent metadata

Field	Value
Publication number	US-2020200225-A1
Application number	US-201816225676-A
Country	US
Kind code	A1
Filing date	Dec 19, 2018
Priority date	Dec 19, 2018
Publication date	Jun 25, 2020
Grant date	—

Abstract

A wedge clutch includes first and second races supported for rotation about a common axis. The first race defines a cam surface and circumferentially arranged pockets recessed into the cam surface. A wedge element is formed of circumferentially arranged wedges each having an ear disposed in one of the pockets. Resilient members are disposed in the pockets and act between the ears to bias the wedge element to a contracted position in which the wedge elements collectively contract towards the axis and the clutch is engaged. A cage is axial movable towards the wedge element to engage with the ears to compress the resilient members and move the wedge element to an expanded position in which the wedge elements collectively expand away from the axis and the clutch is disengaged.

First claim

What is claimed is:

1 . A wedge clutch comprising:
first and second races supported for rotation about a common axis, the first race defining a cam surface and circumferentially arranged pockets recessed into the cam surface; a wedge element formed of circumferentially arranged wedges each having an ear disposed in one of the pockets; resilient members disposed in the pockets and acting between the ears to bias the wedge element to a contracted position in which the wedge elements collectively contract towards the axis and the clutch is engaged; and a cage axial movable towards the wedge element to engage with the ears to compress the resilient members and move the wedge element to an expanded position in which the wedge elements collectively expand away from the axis and the clutch is disengaged.

2 . The wedge clutch of claim 1 , wherein the cage including fingers configured to engage with the ears.

3 . The wedge clutch of claim 2 , wherein the fingers each include at least one tapered side, wherein the tapered sides are engageable with the ears.

4 . The wedge clutch of claim 1 , wherein the wedges are arranged in pairs with the ears of each pair disposed in a same one of the pockets, wherein the cage includes fingers each corresponding with one of the pairs and configured to wedge between the ears of the pair to urge the wedges of the pair away from each other when the cage moves towards the wedge element to disengage the clutch.

5 . The wedge clutch of claim 4 , wherein the pockets define opposing radial walls, wherein each of the ears includes a first side engaging with one of the fingers and a second side engaging with one of the resilient member that acts between the second side and a corresponding one of the radial walls.

6 . The wedge clutch of claim 4 , wherein the fingers have tapered sides.

7 . The wedge clutch of claim 1 , wherein the wedge element includes links interconnected between the wedges such that the wedges are circumferentially movable relative to each other.

8 . The wedge clutch of claim 1 , wherein each of the wedges includes a plurality of axial stacked segments each including an inner edge.

9 . The wedge clutch of claim 8 , wherein the second race defines axially spaced circular grooves each receiving one of the inner edges therein.

10 . The wedge clutch of claim 1 , wherein the first race is a carrier and the second race is a hub supported for rotation within the carrier.

11 . A wedge clutch comprising:
an inner race; an outer race defining an internal cam surface and circumferentially arranged pockets recessed into the cam surface; a wedge element including a plurality of arcuate wedges each having a ramp conforming in shape with the cam surface and an ear extending radially outward from the ramp, the wedges being arranged in pairs and circumferentially disposed around the inner race such that the ramps nest with the cam surface and the ears of each of the pairs is disposed in a same one of the pockets, wherein movement of the wedges of each pair towards each other contracts the wedge element to an engageable state and movement of the wedges of each pair away from each other expands the wedge element to a disengaged state; and resilient members disposed in the pockets and acting between the ears and the outer race to bias the wedges of each pair towards each other.

12 . The wedge clutch of claim 11 further comprising an actuator having features insertable between the ears of each of the pairs to urge the wedges of each pair away from each other.

13 . The wedge clutch of claim 12 , wherein the actuator includes an annular cage having the features circumferentially arranged thereon.

14 . The wedge clutch of claim 12 , wherein the features are fingers.

15 . The wedge clutch of claim 14 , wherein the fingers define at least one tapered side.

16 . The wedge clutch of claim 11 , wherein each of the wedges includes a plurality of axial stacked segments.

17 . A wedge clutch comprising:
a carrier defining an internal cam surface and circumferentially arranged pockets recessed into the cam surface; a hub supported for rotation within the carrier; a clutch element radially disposed between the carrier and the hub and configured to couple the carrier and the hub when the clutch is engaged and to permit relative rotation between the carrier and the hub when the clutch is disengaged, the clutch element being comprised of a plurality of circumferentially arranged wedges encircling the hub and configured to nest with the cam surface; and resilient members disposed in the pockets with each resilient member acting between the carrier and a corresponding one of the wedges to bias the wedges onto the hub.

18 . The clutch of claim 17 , wherein each of the wedges defines an ear that is disposed in a corresponding one of the pockets and is in contact with a corresponding one of the resilient members.

19 . The clutch of claim 17 further comprising an actuator having features insertable between the wedges to disengage the clutch.

20 . The clutch of claim 19 , wherein the actuator includes an annular cage having the features circumferentially arranged thereon.

Assignees

• Schaeffler Technologies Ag

Inventors

• Carlino Ryan

Classifications

• F16D15/00 Primary

  Clutches with wedging balls or rollers or with other wedgeable separate clutching members (freewheels, freewheel clutches F16D41/00) · CPC title

• F16D41/082

  the intermediate coupling members wedging by movement other than pivoting or rolling · CPC title

• F16D13/16

  shaped as radially-movable segments · CPC title

• F16D41/076

  the wedging coupling members being non-releasably joined to form a single annular piece, e.g. either the members being integral projections from the piece, or the piece being an elastic ring cast round the radial centres of the members · CPC title

• F16D11/16

  with clutching members movable otherwise than only axially (F16D11/02, F16D11/08 take precedence) · CPC title