Stator cone clutch

Patent metadata

Field	Value
Publication number	US-9810303-B2
Application number	US-201514811082-A
Country	US
Kind code	B2
Filing date	Jul 28, 2015
Priority date	Nov 7, 2014
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A torque converter, including: a cover arranged to receive torque; an impeller including an impeller shell non-rotatably connected to the cover; a turbine in fluid communication with the impeller and including a turbine shell; a stator at least partially located between the impeller and the turbine; and including a body portion with at least one stator blade and a first frusto-conical surface; a stator cone clutch including the first frusto-conical surface and a flange including a second frusto-conical surface; and a first thrust bearing axially disposed between the stator cone clutch and the impeller shell. In a stator locked mode: the body portion and the flange are non-rotatably connected; and the stator cone clutch is arranged to urge the first thrust bearing against the impeller shell in a first axial direction.

First claim

What is claimed is:

1. A torque converter, comprising:
a cover arranged to receive torque;
an impeller including an impeller shell non-rotatably connected to the cover;
a turbine:
in fluid communication with the impeller; and,
including a turbine shell;

a stator:
at least partially located between the impeller and the turbine; and,
including a body portion with at least one stator blade and a first frusto-conical surface;

a stator cone clutch including:
the first frusto-conical surface; and,
a flange including a second frusto-conical surface;

a first thrust bearing axially disposed between the stator cone clutch and the impeller shell; and,
wherein in a stator locked mode:
the body portion and the flange are non-rotatably connected;
the stator cone clutch is arranged to urge the first thrust bearing against the impeller shell in a first axial direction; and,
the first thrust bearing is aligned, in a first axial direction, with the first frusto-conical surface or with the second frusto-conical surface.

2. The torque converter of claim 1 , wherein a line, orthogonal to an axis of rotation for the torque converter, passes through the first and second frusto-conical surfaces and forms respective acute angles with respect to the first and second frusto-conical surfaces.

3. The torque converter of claim 1 , wherein:
in the stator locked mode, fluid circulating through the impeller and the turbine is arranged to generate a first force urging the body portion in the first axial direction to non-rotatably connect the body portion and the flange; and,
in a stator free-wheel mode, the fluid circulating through the impeller and the turbine is arranged to generate a second force, in a second axial direction opposite the first axial direction, urging the body portion in the second axial direction to enable rotation between the body portion and the flange.

4. The torque converter of claim 1 , wherein the stator includes a plate:
fixed to the flange; and,
arranged to restrict movement of the body portion in a second axial direction, opposite the first axial direction.

5. The torque converter of claim 4 , wherein:
the plate includes a radially outermost portion; and,
in a stator freewheel mode:
the body portion is rotatable with respect to the flange; and,
the radially outermost portion is in contact with the body portion.

6. The torque converter of claim 1 , further comprising:
friction material disposed between the body portion and the flange and fixed to one of the body portion or the flange, wherein in the stator locked mode, the body portion, the friction material, and the flange are non-rotatably connected.

7. The torque converter of claim 1 , further comprising:
a second thrust bearing located between the turbine shell and the stator cone clutch in the first axial direction, wherein for the stator locked mode, the second thrust bearing is arranged to transmit thrust from the turbine shell to the stator cone clutch to non-rotatably connect the body portion and the flange.

8. The torque converter of claim 7 , wherein:
the second thrust bearing:
is directly engaged with the flange; and,
in the stator locked mode, is arranged to transmit the thrust from the turbine shell to the flange to displace the flange in the first axial direction; and,

the first thrust bearing is directly engaged with the body portion.

9. The torque converter of claim 7 , wherein:
the second thrust bearing:
is directly engaged with the body portion; and,
in the stator locked mode, is arranged to transmit the thrust from the turbine shell to the body portion to displace the body portion in the first axial direction; and,

the first thrust bearing is directly engaged with the flange.

10. The torque converter of claim 1 , further comprising:
a second thrust bearing located between the turbine shell and the stator cone clutch in the first axial direction, wherein:
the stator cone clutch includes a clutch plate with a third frusto-conical surface;
the body portion includes a fourth frusto-conical surface;
the second thrust bearing is directly engaged with the clutch plate; and,
in the stator locked mode:
the second thrust bearing is arranged to transmit the thrust from the turbine shell to the clutch plate to non-rotatably connect the first and third frusto-conical surfaces; and,
circulation of fluid through the impeller and turbine is arranged to generate a force urging the body portion in the first axial direction to non-rotatably connect the second and fourth frusto-conical surfaces.

11. The torque converter of claim 10 , wherein the clutch plate includes a radially inner-most distal end non-rotatably connected to the flange.

12. The torque converter of claim 10 , wherein:
one of the clutch plate or the flange includes at least one slot;
the other of the clutch plate or the flange includes at least one protrusion disposed in the at least one slot; and,
the at least one slot and the at least one protrusion non-rotatably connect the clutch plate and the flange.

13. The torque converter of claim 1 , wherein the stator cone clutch includes a diaphragm spring:
fixed to the flange; and,
urging the body portion in a second axial direction, opposite the first axial direction.

14. A torque converter, comprising:
a cover arranged to receive torque;
an impeller including an impeller shell non-rotatably connected to the cover;
a turbine:
in fluid communication with the impeller; and,
including a turbine shell;

a stator:
at least partially located between the impeller and the turbine; and,
including a body portion with at least one stator blade and a first frusto-conical surface;

a stator cone clutch including:
the first frusto-conical surface; and,
a flange including a second frusto-conical surface;

a first thrust bearing directly engaged with the stator cone clutch and the impeller shell; and,
a second thrust bearing directly engaged with the turbine shell and the stator cone clutch, wherein in a stator locked mode:
fluid circulating through the impeller and the turbine is arranged to generate:
a first force bypassing the second thrust bearing and urging the body portion in a first axial direction to non-rotatably connect the first and second frusto-conical surfaces; or,
a second force urging the second thrust bearing in the first axial direction to non-rotatably connect the first and second frusto-conical surfaces; and,

the first thrust bearing is arranged to transmit the first or second force to the impeller shell.

15. The torque converter of claim 14 , wherein the first thrust bearing is arranged to transmit the first force and the second force to the impeller shell.

16. The torque converter of claim 14 , wherein:
the fluid circulating through the impeller and the turbine is arranged to generate the second force urging the second thrust bearing in the first axial direction to non-rotatably connect the first and second frusto-conical surfaces; and,
the second thrust bearing is directly engaged with the flange.

17. The torque converter of claim 14 , wherein:
in the stator locked mode, the fluid circulating through the impeller and the turbine is arranged to generate the first and second forces; and,
the second thrust bearing is directly engaged with the body portion.

18. A torque converter, comprising:
a cover arranged to receive torque;
an impeller including an impeller shell non-rotatably connected to the cover;
a turbine:
in fluid communication with the impeller; and,
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Assignees

• Schaeffler Technologies Ag
• Schaeffler Tech Ag & Co

Inventors

• Steinberger Markus
• Lindemann Patrick M

Classifications

• F16H45/02 Primary

  with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) · CPC title

• F16H2045/0205

  two chamber system, i.e. without a separated, closed chamber specially adapted for actuating a lock-up clutch · CPC title

• F16H2045/0294

  Single disk type lock-up clutch, i.e. using a single disc engaged between friction members · CPC title

• F16D25/0632

  with conical friction surfaces, e.g. cone clutches · CPC title

• F16D13/26

  in which the or each axially-movable member is pressed exclusively against an axially-located member · CPC title