Conical spring washer, transmission system, and method of assembly thereof

Patent metadata

Field	Value
Publication number	US-11060578-B2
Application number	US-201916416966-A
Country	US
Kind code	B2
Filing date	May 20, 2019
Priority date	May 22, 2018
Publication date	Jul 13, 2021
Grant date	Jul 13, 2021

Abstract

A conical spring washer includes a symmetrical annular body, a plurality of inner tabs and a plurality of outer tabs formed in the body. Each of the plurality of inner tabs has a width that tapers radially inwardly. Each of the plurality of outer tabs has a maximum width that is greater than a maximum width of each of the plurality of inner tabs. An intermediate portion is defined in the body and disposed between the plurality of inner tabs and plurality of outer tabs. The plurality of inner tabs and plurality of outer tabs are flexibly coupled to the intermediate portion.

First claim

The invention claimed is:

1. A conical spring washer, comprising:
a symmetrical annular body;
a plurality of inner tabs formed by the body, each of the plurality of inner tabs having a width that tapers radially inwardly;
a plurality of outer tabs formed by the body, each of the plurality of outer tabs having a maximum width that is greater than a maximum width of each of the plurality of inner tabs; and
an intermediate portion defined in the body within a reference plane and located between the plurality of inner tabs and plurality of outer tabs;
wherein, the plurality of inner tabs and plurality of outer tabs are flexibly coupled to the intermediate portion,
wherein, each of the plurality of inner tabs is radially aligned with a respective one of the plurality of outer tabs;
wherein, the plurality of inner tabs alternate between a first side of the reference plane and a second side of the reference plane along an inner radius of the body; and
wherein, the plurality of outer tabs alternate between the first side of the reference plane and the second side of the reference plane along an outer radius of the body.

2. The conical spring washer of claim 1 , wherein the conical spring washer is configured for installation between a first body and a second body of a transmission assembly regardless of a direction in which a first side of the conical spring washer and a second side of the conical spring washer arranged opposite the first side are oriented.

3. The conical spring washer of claim 1 , wherein the plurality of inner tabs and the plurality of outer tabs are pivotally coupled to the intermediate portion.

4. The conical spring washer of claim 1 , wherein:
the plurality of inner tabs comprises a first inner tab and a second inner tab, the first inner tab being disposed radially adjacent the second inner tab, and
a distal end of the first inner tab is located to the first side of the reference plane and a distal end of the second inner tab is disposed to the second side of the reference plane.

5. The conical spring washer of claim 1 , wherein:
the plurality of outer tabs comprises a first outer tab and a second outer tab, the first outer tab being disposed radially adjacent the second outer tab, and
a distal end of the first outer tab is located to the first side of the reference plane and a distal end of the second outer tab is located to the second side of the reference plane.

6. The conical spring washer of claim 1 , wherein each of the plurality of inner tabs is formed by curved edges.

7. The conical spring washer of claim 1 , wherein each of the plurality of outer tabs is formed by curved edges.

8. The conical spring washer of claim 1 , wherein a first outer tab of the plurality of outer tabs is spaced from a radially adjacent second outer tab by a defined gap.

9. The conical spring washer of claim 1 , wherein each of the plurality of outer tabs is equally spaced from a radially adjacent outer tab by a defined gap.

10. The conical spring washer of claim 1 , wherein each of the plurality of inner tabs is equally spaced from a radially adjacent inner tab by a defined gap.

11. The conical spring washer of claim 1 , wherein:
a first inner tab and a first outer tab are radially aligned with one another;
the first inner tab is disposed in a concave or convex orientation relative to the reference plane; and
the first outer tab is disposed in an opposite orientation of the first inner tab relative to the reference plane.

12. The conical spring washer of claim 1 , wherein:
the plurality of inner tabs alternate between a concave orientation and a convex orientation along an inner radius of the body relative to the reference plane; and
the plurality of outer tabs alternate between a concave orientation and a convex orientation along an outer radius of the body relative to the reference plane.

13. The conical spring washer of claim 12 , wherein:
for each of the plurality of inner tabs disposed in the concave orientation relative to the reference plane, the respective radially aligned outer tab is disposed in the convex orientation relative to the reference plane; and
for each of the plurality of inner tabs disposed in the convex orientation relative to the reference plane, the respective radially aligned outer tab is disposed in the concave orientation relative to the reference plane.

14. A transmission assembly, comprising:
an outer housing defining an internal cavity;
a first body disposed within the internal cavity;
a second body disposed within the internal cavity and aligned with the first body;
a conical spring washer disposed within the internal cavity at a location between the first body and the second body, the conical spring washer comprising:
a symmetrical annular body;
a plurality of inner tabs formed by the body, each of the plurality of inner tabs having a width that tapers radially inwardly;
a plurality of outer tabs formed by the body, each of the plurality of outer tabs having a maximum width that is greater than a maximum width of each of the plurality of inner tabs; and
an intermediate portion defined in the body and within a reference plane, the intermediate portion being located between the plurality of inner tabs and plurality of outer tabs;
wherein, the plurality of inner tabs and plurality of outer tabs are flexibly coupled to the intermediate portion;
wherein, each of the plurality of inner tabs is radially aligned with a respective one of the plurality of outer tabs;
wherein, the plurality of inner tabs alternate between a first side of the reference plane and a second side of the reference plane along an inner radius of the body; and
wherein, the plurality of outer tabs alternate between the first side of the reference plane and the second side of the reference plane along an outer radius of the body.

15. The transmission assembly of claim 14 , wherein the first body comprises a bearing assembly and the second body comprises a hub.

16. The transmission assembly of claim 14 , wherein:
a first inner tab and a first outer tab are radially aligned with one another;
a distal end of the first inner tab is located to the first side of the reference plane;
and a distal end of the first outer tab is located to the second side of the reference plane.

17. The transmission assembly of claim 14 , wherein the conical spring washer is installed between the first body and the second body regardless of a direction in which a first side of the conical spring washer and a second side of the conical spring washer arranged opposite the first side are oriented.

18. The transmission assembly of claim 14 , wherein:
for each of the plurality of inner tabs located to the first side of the reference plane, the respective radially aligned outer tab is located to the second side of the reference plane; and
for each of the plurality of inner tabs located to the second side of the reference plane, the respective radially aligned outer tab is located to the first side of the reference plane.

19. The transmission assembly of claim 14 , wherein each of the plurality of inner tabs and each of the plurality of outer tabs comprise curved edges.

20. A method of assembling a transmission assembly, comprising:
providing an outer housing, a first body, a second body, a drive shaft, and a symmetrical conical spring washer having a first side and a second side, wherein the washer is formed by a plurality of inner tabs, a plurality of outer tabs, and an intermediate portion defined there

Assignees

• Allison Transm Inc

Inventors

• Hunt Mickey Jay

Classifications

• F16F1/324 Primary

  characterised by having tongues or arms directed in a generally radial direction, i.e. diaphragm-type springs · CPC title

• F16F2230/0052

  Physically guiding or influencing · CPC title

• F16F1/32 Primary

  Belleville-type springs (friction-clutch diaphragm springs F16D13/583) · CPC title

• F16C1/28

  with built in bearings {, e.g. sheathing with rolling elements between the sheathing and the core element} · CPC title

• F16F2234/04

  conical · CPC title