Switchable one way clutch including selector bracket

Patent metadata

Field	Value
Publication number	US-9995350-B2
Application number	US-201514823300-A
Country	US
Kind code	B2
Filing date	Aug 11, 2015
Priority date	Aug 11, 2015
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

A selector bracket assembly for a one way clutch assembly comprising an annular body portion having: first and second radial surfaces; an inner circumferential surface, connecting the first and second radial surfaces; at least one cutout portion; at least one axially extending post adjacent to the at least one cutout portion; and, an outer circumferential surface including a plurality of radially outward extending tabs; and, at least one actuator pin disposed radially outward of the inner circumferential surface and arranged for engagement with the selector bracket assembly to lock a one way clutch. A switchable one way clutch assembly having said selector bracket, or at least two selector brackets for making selectable the following states: free wheel or locked in both the first and second opposing circumferential directions; locked in first and free wheel in second circumferential direction; and, free wheel in first and locked in second circumferential direction.

First claim

What I claim is:

1. A switchable one way clutch assembly comprising:
first and second outer races;
at least one selector bracket assembly disposed between the first and second outer races, the at least one selector bracket assembly comprising:
a selector bracket annular body portion having:
a first radial surface;
a second radial surface, opposite the first radial surface;
an inner circumferential surface, connecting the first and second radial surfaces;
at least one cutout portion;
at least one axially extending post adjacent to the at least one cutout portion; and,
an outer circumferential surface including a plurality of radially outward extending tabs; and,

at least one actuator pin disposed radially outward of the inner circumferential surface and arranged for engagement with the selector bracket assembly to lock a one way clutch;

first and second inner races disposed radially inward of the first and second outer races, respectively;
a splined central race disposed between the first and second inner races and including axially protruding dog teeth arranged for engagement with the first and second inner races respectively;
a first plurality of rollers and a first plurality of roller springs disposed between the first inner race and the first outer race; and, a second plurality of rollers and a second plurality of roller springs disposed between the second inner race and the second outer race.

2. The switchable one way clutch assembly as in claim 1 wherein the at least one actuator pin is disengageable to allow the one way clutch assembly to free wheel in at least one direction.

3. The switchable one way clutch assembly as in claim 1 wherein the at least one axially extending post includes a planar surface arranged for urging at least one roller away from an outer race inner ramp for unlocking the one way clutch in a neutral state.

4. The switchable one way clutch assembly as in claim 1 , wherein the at least one selector bracket assembly further comprises a plurality of circumferentially extending bracket springs disposed adjacent to the plurality of radially outward extending tabs; wherein the circumferentially extending bracket springs are arranged for circumferential movement of the selector bracket assembly with respect to an outer race.

5. The switchable one way clutch assembly as in claim 3 wherein the at least one cutout portion includes a rounded surface having a first width (w 1 ), a side having a second width (w 2 ), and a recess; wherein the second width (w 2 ) is greater than the first width (w 1 ); and, wherein the rounded surface is connected to the planar surface of the at least one axially extending post.

6. The switchable one way clutch assembly as in claim 1 , wherein the at least one selector bracket assembly further comprises a plurality of apertures extending from the first radial surface to the second radial surface and arranged for receiving a plurality of positioning pins.

7. The switchable one way clutch assembly as in claim 1 further comprising first and second thin section bearings, the first thin section bearing disposed between the first inner race and the first outer race and the second thin section bearing disposed between the second inner race and the second outer race.

8. The switchable one way clutch assembly as in claim 1 wherein the at least one selector bracket assembly is arranged to vary between a lock-free wheel state and a lock-lock state.

9. The switchable one way clutch assembly as in claim 1 , wherein the second outer race further includes at least one outer race inner ramp, wherein the at least one inner ramp is arranged to engage at least one roller in a lock-lock state.

10. A switchable one way clutch assembly comprising:
a first outer race and a first inner race disposed radially inward of the first outer race;
at least one selector bracket assembly including an actuator pin and a plurality of circumferentially extending bracket springs;
a splined central race disposed between the first inner race the at least one selector bracket assembly and including axially protruding dog teeth arranged for engagement with the first inner race;
a first plurality of rollers and a first plurality of roller springs disposed between the first inner race and the first outer race;
wherein in a neutral state:
the actuator pin is disengaged;
the plurality of circumferentially extending bracket springs are arranged for pushing the at least one selector bracket assembly into a neutral position;
the first plurality of rollers are arranged for pushing against the first plurality of roller springs for disengagement from the first outer race; and,
the first outer race is arranged to spin freely in a first circumferential direction; and,

wherein in an active state:
the actuator pin is displaced radially inward to engage and the first inner race is not movable in a first circumferential direction;
the first plurality of rollers are disposed and in contact with the first inner race and the first outer race; and,
the first outer race is arranged to lock.

11. The switchable one way clutch assembly as in claim 10 wherein the at least one selector bracket assembly further comprises an annular body portion including a first radial surface, a second radial surface opposite the first radial surface, and an inner circumferential surface having at least one cutout portion.

12. The switchable one way clutch assembly as in claim 11 , wherein the first outer race further includes at least one outer race inner ramp, wherein the at least one inner ramp is arranged to engage at least one roller in a lock-lock state.

13. The switchable one way clutch assembly as in claim 10 further including a second outer race and a second inner race disposed radially inward of the second outer race; and, a second plurality of rollers and a second plurality of roller springs disposed between the second inner race and the second outer race.

14. The switchable one way clutch assembly as in claim 13 further comprising at least two selector brackets arranged to make switchable at least two one way clutches to provide selection of one or more of the following states:
free wheel first and second opposing circumferential directions;
locked in first circumferential direction and free wheel in second circumferential direction;
free wheel in first circumferential direction and locked in second circumferential direction; and,
locked in first and second circumferential directions.

Assignees

• Schaeffler Technologies Ag

Inventors

• Peet Brian

Classifications

• F16D2041/0605

  Spring details · CPC title

• F16D41/066 Primary

  all members having the same size and only one of the two surfaces being cylindrical · CPC title

• F16D47/04 Primary

  of which at least one is a freewheel (F16D47/02, F16D47/06 take precedence; freewheels combined with a clutch to lock the driving and driven members of the freewheel F16D41/04, F16D41/26) · CPC title

• F16D41/088

  the intermediate members being of only one size and wedging by a movement not having an axial component, between inner and outer races, one of which is cylindrical · CPC title

• F16D41/04

  combined with a clutch for locking the driving and driven members (F16D41/02, F16D41/24 take precedence) · CPC title