Wedge plate with angled struts and one-way wedge clutch with wedge plate having angled struts

Patent metadata

Field	Value
Publication number	US-10563709-B2
Application number	US-201715695728-A
Country	US
Kind code	B2
Filing date	Sep 5, 2017
Priority date	Sep 5, 2017
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

A wedge plate for a wedge plate clutch, including: a radially inner surface with a plurality of ramps, each ramp sloping radially inwardly in a first circumferential direction; a radially outer surface; a first circumferential end; a second circumferential end; a gap separating the first circumferential end from the second circumferential end in the first circumferential direction; a first slot open to the radially inner surface and extending radially outwardly; a second slot open to the radially outer surface and extending radially inwardly; and a portion circumferentially located between the first slot and the second slot. a first line passes through the axis of rotation and the portion. A second line passes through the radially inner surface, the portion and the radially outer surface without passing through the first slot or the second slot. An acute angle is formed between the first line and the second line.

First claim

The invention claimed is:

1. A wedge plate for a wedge plate clutch, comprising:
a radially inner surface with a plurality of ramps, each ramp in the plurality of ramps sloping radially inwardly in a first circumferential direction, the radially inner surface defining a first slot extending diagonally outwardly;
a radially outer surface defining a second slot extending diagonally inwardly;
a first circumferential end; and,
a second circumferential end separated from the first circumferential end by a gap, wherein the wedge plate is supported for rotation around an axis of rotation; wherein a first straight line passes through the axis of rotation, the first slot, and the second slot; wherein the wedge plate is circumferentially non-continuous; wherein the first radially inner surface defines an opening of the first slot facing radially inwardly, and a first end of the first slot bounding the first slot radially outwardly; and wherein a second straight line passes through the axis of rotation and the end of the first slot without passing through the opening of the first slot.

2. The wedge plate of claim 1 , wherein:
the second slot bounded radially inwardly by a second end; and,
the second end is radially inward of the first end.

3. The wedge plate of claim 1 , wherein
no straight line passes through the axis of rotation, the end of the first slot, and the opening of the first slot.

4. A wedge clutch, comprising:
an inner race;
an outer race supported for rotation about an axis of rotation;
a wedge plate radially disposed between the inner race and the outer race and including:
a first radially inner surface with a first plurality of ramps, each ramp in the first plurality of ramps sloping radially inwardly in a first circumferential direction, the first radially inner surface defining a first slot extending diagonally outwardly;
a first radially outer surface defining a second slot extending diagonally inwardly;
a first circumferential end; and,
a second circumferential end separated from the first circumferential end by a gap, wherein a first straight line passes through the axis of rotation, the first slot, and the second slot; wherein the wedge plate is circumferentially non-continuous; wherein the first radially inner surface defines an opening of the first slot facing radially inwardly, and a first end of the first slot bounding the first slot radially outwardly; and wherein no straight line passes through the axis of rotation, the end of the first slot, and the opening of the first slot.

5. The wedge clutch of claim 4 , wherein:
the second slot is bounded radially inwardly by a second end; and,
the second end is radially inward of the first end.

6. The wedge plate of claim 4 , wherein
a second straight line passes through the axis of rotation and the end of the first slot without passing through the opening of the first slot.

7. The wedge clutch of claim 4 , wherein:
the first radially inner surface defines a third slot extending diagonally outwardly; and,
the second slot is an only slot, extending diagonally inwardly, between the first slot and the third slot.

8. The wedge clutch of claim 4 , wherein:
for rotation of the inner race, with respect to the outer race in the first circumferential direction, the inner race displaces the wedge plate radially outwardly to non-rotatably connect the inner race and the outer race; and,
the inner race is rotatable, with respect to the outer race, in a second circumferential direction opposite the first circumferential direction.

9. The wedge clutch of claim 4 , wherein:
the outer race includes a second radially inner surface in contact with the wedge plate; and,
the inner race includes a second radially outer surface with a second plurality of ramps; and,
the second plurality of ramps is in contact with the first plurality of ramps.

10. The wedge clutch of claim 9 , wherein each ramp in the second plurality of ramps slopes radially inwardly in the first circumferential direction.

11. The wedge clutch of claim 4 , wherein the wedge plate is pre-loaded to urge the wedge plate radially outwardly into contact with the outer race.

12. The wedge clutch of claim 4 , wherein the inner race is a radially innermost component of the wedge clutch.

13. A wedge clutch, comprising:
an outer race;
an inner race:
located radially inward of the outer race; and,
including a first plurality of ramps, each ramp in the first plurality of ramps sloping radially inwardly in a first circumferential direction; and,

a wedge plate radially disposed between the inner race and the outer race and including:
a first radially inner surface with a second plurality of ramps in contact with the first plurality of ramps, each ramp in the second plurality of ramps sloping radially inwardly in the first circumferential direction, the first radially inner surface defining a first slot;
a first radially outer surface in contact with the outer race;
a first circumferential end; and,
a second circumferential end separated from the first circumferential end by a gap, wherein:

the outer race is supported for rotation with respect to the inner race about an axis of rotation;
in a locked mode of the wedge clutch, the inner race and the outer race are non-rotatably connected;
in a free-wheel mode of the wedge clutch, the inner race is rotatable with respect to the outer race in a second circumferential direction, opposite the first circumferential direction;
to transition from the locked mode to the free-wheel mode, the inner race rotates in the second direction with respect to the wedge plate and the outer race to displace the wedge plate radially outwardly;
the wedge plate is circumferentially non-continuous;
the first radially inner surface defines an opening of the first slot facing radially inwardly, and an end of the first slot bounding the first slot radially outwardly; and,
a straight line passes through the axis of rotation and the end of the first slot without passing through the opening of the first slot.

14. The wedge clutch of claim 13 , wherein:
for rotation of the inner race, with respect to the outer race in the first circumferential direction, the inner race displaces the wedge plate radially outwardly to non-rotatably connect the inner race and the outer race; and,
the inner race is rotatable, with respect to the outer race, in a second circumferential direction opposite the first circumferential direction.

15. The wedge clutch of claim 13 , wherein the wedge plate is pre-loaded to urge the wedge plate radially outwardly into contact with the outer race.

16. The wedge clutch of claim 13 , wherein
no straight line passes through the axis of rotation, the end of the first slot, and the opening of the first slot.

17. The wedge clutch of claim 13 , wherein the inner race is a radially innermost component of the wedge clutch.

Assignees

• Schaeffler Technologies Ag

Inventors

• Ramsey John

Classifications

• F16D2300/00

  Special features for couplings or clutches · CPC title

• F16D41/069 Primary

  the intermediate members wedging by pivoting or rocking, e.g. sprags (F16D41/061 takes precedence) · CPC title

• F16D15/00

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

• F16D41/063 Primary

  the intermediate members wedging by moving along the inner and the outer surface without pivoting or rolling, e.g. sliding wedges (F16D41/061 takes precedence) · CPC title