Housing for a transmission

Patent metadata

Field	Value
Publication number	US-10697532-B2
Application number	US-201615388106-A
Country	US
Kind code	B2
Filing date	Dec 22, 2016
Priority date	Dec 22, 2016
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A continuously variable transmission for a utility vehicle includes a drive clutch, a driven clutch operably coupled to the drive clutch, and a housing generally surrounding the drive and driven clutches. The housing includes an inner cover, an outer cover removably coupled to the inner cover, an air inlet positioned on one of the inner cover or the outer cover, and an air outlet positioned on the one of the inner cover or the outer cover.

First claim

What is claimed is:

1. A continuously variable transmission (“CVT”) for a utility vehicle, comprising:
a drive clutch;
a driven clutch operably coupled to the drive clutch; and
a housing generally surrounding the drive and driven clutches, the housing including an inner cover, an outer cover removably coupled to the inner cover, an air inlet positioned on one of the inner cover or the outer cover, and an air outlet positioned on the one of the inner cover or the outer cover, wherein the inner cover includes a planar surface extending from the air inlet to a forward extent of the air outlet.

2. The CVT of claim 1 , wherein the air inlet and the air outlet are positioned on the inner cover.

3. The CVT of claim 1 , wherein the inner cover includes a first channel configured to flow air from the air inlet within the inner cover and a second channel configured to flow air from the air inlet within the outer cover.

4. The CVT of claim 3 , wherein the outer cover includes a third channel configured to direct air to the driven clutch.

5. The CVT of claim 4 , wherein the outer cover includes a baffle positioned intermediate a portion of the drive clutch and a portion of the driven clutch.

6. The CVT of claim 4 , wherein the outer cover includes a fourth channel configured to receive air from the second channel of the inner cover, and the fourth channel is configured to direct air to the drive clutch.

7. The CVT of claim 1 , wherein the inner cover includes a first channel to direct air to the drive clutch and the outer cover includes a second channel to direct air to the drive clutch.

8. A continuously variable transmission (“CVT”) for a utility vehicle, comprising:
a drive clutch;
a driven clutch operably coupled to the drive clutch; and
a housing generally surrounding the drive and driven clutches, the housing including an inner cover and an outer cover removably coupled to the inner cover, and the housing further including an air inlet and an air outlet, and the housing being configured to direct air from the air inlet in a first direction at the inner cover, in a second direction at the inner cover, and in a third direction at the inner cover, the second direction being different than the first direction.

9. The CVT of claim 8 , wherein the first direction is towards the drive clutch, the second direction is towards the driven clutch, and the third direction is towards the outer cover.

10. The CVT of claim 8 , wherein the third direction is towards the outer cover, and air at the drive clutch and within the outer cover is directed toward the driven clutch.

11. The CVT of claim 10 , wherein the outer cover includes a channel and the air directed towards the driven clutch from the drive clutch flows through the channel.

12. The CVT of claim 11 , wherein the outer cover includes a baffle extending over a portion of the channel of the outer cover.

13. The CVT of claim 8 , wherein the third direction is substantially perpendicular to the first and second directions.

14. A continuously variable transmission (“CVT”) for a utility vehicle, comprising:
a drive clutch having a moveable sheave and a stationary sheave;
a driven clutch operably coupled to the drive clutch and having a moveable sheave and a stationary sheave; and
a housing generally surrounding the drive and driven clutches, the housing including an inner cover comprised of a metallic material, an outer cover removably coupled to the inner cover, an air inlet positioned on one of the inner cover or the outer cover, and an air outlet spaced apart from the air inlet, the air outlet having a width, and the air outlet including a substantially tangent surface extending laterally along a planar surface of the housing to define the width of the air outlet and extending along a portion of the moveable sheave and the stationary sheave of the driven clutch, and the housing having a rear surface configured to flow air along the tangent surface when the air is expelled from the housing.

15. The CVT of claim 14 , wherein the air inlet and the air outlet are positioned on the inner cover.

16. The CVT of claim 14 , wherein the air outlet has a generally square shape.

17. The CVT of claim 14 , wherein the air expelled from the housing is directed rearwardly from the driven clutch to the rear surface of the housing and is directed upwardly toward the tangent surface of the air outlet.

18. The CVT of claim 14 , wherein a portion of the rear surface of the housing extends linearly and continuously to the tangent surface.

19. The CVT of claim 14 , wherein the inner cover directs air in a first direction toward the drive clutch, in a second direction toward the driven clutch, and in a third direction toward the outer cover.

20. The CVT of claim 14 , wherein the planar surface is an upper surface of the housing.

21. The CVT of claim 14 , wherein the air inlet and the air outlet are both positioned along the planar surface.

Assignees

• Polaris Inc

Inventors

• Schleif Andrew C
• Kuhl Amery D
• Hicke David J
• Bejawada Narender

Classifications

• F16H57/0489 Primary

  with endless flexible members, e.g. belt CVTs · CPC title

• F16H57/031

  characterised by covers or lids for gearboxes · CPC title

• F16H2057/02056

  for utility vehicles, e.g. tractors or agricultural machines · CPC title

• F16H57/04

  Features relating to lubrication or cooling {or heating} (control of lubrication or cooling in hydrostatic gearing F16H61/4165) · CPC title

• F16H57/0415

  Air cooling or ventilation; Heat exchangers; Thermal insulations · CPC title