Tandem type hydraulic clutch system

• US 5,662,198 A
• Filed: 08/18/1995
• Issued: 09/02/1997
• Est. Priority Date: 08/19/1994
• Status: Expired due to Fees

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Kodama, Yoshihiro, Kojima, Yoichi
• Primary Examiner(s): Bonck, Rodney H.
• Application Number:
  US08/516,543
• Time in Patent Office: 746 Days
• Field of Search: 192/87.11, 192/106 F, 192/87.1, 192/48.8, 475/146
• US Class Current: 192/48.611
• CPC Class Codes: F16D 21/06 at least two driving shafts or two driven shafts being concentric
• CPC Class Codes: F16D 25/0638 with more than two discs, e.g. multiple lamellae
• CPC Class Codes: F16D 25/10 Clutch systems with a plurality of fluid-actuated clutches arrangements or mounting of clutches in vehicles B60K17/00
• CPC Class Codes: F16H 57/0434 relating to lubrication supply, e.g. pumps arrangement of pumps F16H57/0441; Pressure control grooves with pumping effect for supplying lubricant F16H57/0428; generation and variation of line pressure for transmission control F16H61/0021
• CPC Class Codes: F16H 63/3026 comprising friction clutches or brakes band brake actuating mechanisms F16H63/3003

Abstract

Frictional engagement elements of a first hydraulic clutch and frictional engagement elements of a second hydraulic clutch are supported on a common clutch drum on opposite sides of a snap ring. Openings are defined respectively in the clutch drum and an urging member which is formed integrally with a clutch piston of the second hydraulic clutch for urging the frictional engagement elements toward the snap ring. An urging member for urging the frictional engage elements toward the snap ring is connected to a clutch piston of the first hydraulic clutch and extends through the openings to the outside of the clutch drum. Thus, the pair of hydraulic clutches disposed in a tandem fashion can be operated stably without interference from each other.

Claims

1. A tandem type hydraulic clutch system, comprising:

a first hydraulic clutch having first frictional engagement elements for being urged by a first urging member connected to a first clutch piston which is driven by a hydraulic pressure applied to a first clutch oil chamber; and

a second hydraulic clutch having second frictional engagement elements for being urged by a second urging member connected to a second clutch piston which is driven by a hydraulic pressure applied to a second clutch oil chamber, said first and second hydraulic clutches being axially juxtaposed, wherein

said first and second frictional engagement elements are supported on axially opposite sides of a stopper fixedly mounted on a clutch drum, said first frictional engagement elements being urged toward said stopper by said first urging member, and said second frictional engagement elements being urged toward said stopper by said second urging member,

wherein said first and second clutch pistons are disposed on one axial side of said first and second frictional engagement elements, and

wherein one of said first and second clutch pistons is located at a position axially closer to said first and second frictional engagement elements than the other of said first and second clutch pistons and said one clutch piston applies an urging engagement force to one of said first and second frictional engagement elements from an axial side opposite said one axial side of said first and second frictional engagement elements whereas said other clutch piston applies an urging engagement force to the other of said first and second frictional engagement elements from said one axial side.

2. A tandem type hydraulic clutch system according to claim 1, further including a canceler oil chamber defined between said first and second clutch pistons.

3. A tandem type hydraulic clutch system according to claim 2, wherein a biasing means is disposed in said canceler oil chamber so as to urge said first and second clutch pistons away from each other.

4. A tandem type hydraulic clutch system according to claim 1, wherein said second clutch piston and said second urging member are disposed within said clutch drum, said first clutch piston is disposed within said clutch drum, said first urging member is disposed outside said clutch drum, and said first clutch piston and said first urging member are connected to each other through openings defined in said clutch drum and said second urging member.

5. A tandem type hydraulic clutch system according to claim 4, wherein said second clutch oil chamber is defined between said clutch drum and said second clutch piston, said openings being located radially outside the second clutch oil chamber.

6. A tandem type hydraulic clutch system according to claim 4, further including a canceler oil chamber defined between said first and second clutch pistons.

7. A tandem type hydraulic clutch system according to claim 4, wherein said second clutch oil chamber is defined between said clutch drum and said second clutch piston, said openings being located radially outside the second clutch oil chamber.

8. A tandem type hydraulic clutch system according to claim 4, further including a canceler oil chamber defined between said first and second clutch pistons.

9. A tandem type hydraulic clutch system, comprising:

a first hydraulic clutch having first frictional engagement elements for being urged by a first urging member connected to a first clutch piston which is driven by a hydraulic pressure applied to a first clutch oil chamber; and

a second hydraulic clutch having second frictional engagement elements for being urged by a second urging member connected to a second clutch piston which is driven by a hydraulic pressure applied to a second clutch oil chamber, said first and second hydraulic clutches being axially juxtaposed, wherein

said first and second frictional engagement elements are supported on axially opposite sides of a stopper fixedly mounted on a clutch drum, said first frictional engagement elements being urged toward said stopper by said first urging member, and said second frictional engagement elements being urged toward said stopper by said second urging member, and

wherein said second clutch piston and said second urging member are disposed within said clutch drum, said first clutch piston is disposed within said clutch drum, said first urging member is disposed outside said clutch drum, and said first clutch piston and said first urging member are connected to each other through openings defined in said clutch drum and said second urging member.

10. A tandem type hydraulic clutch system according to claim 9, wherein said second clutch oil chamber is defined between said clutch drum and said second clutch piston, said openings being located radially outside the second clutch oil chamber.

11. A tandem type hydraulic clutch system according to claim 9, wherein said first clutch piston, said first clutch oil chamber, said second clutch piston and said second clutch oil chamber are all located on one axial side of said first and second frictional engagement elements.

12. A tandem type hydraulic clutch system according to claim 9, wherein said second clutch oil chamber is defined between said clutch drum and said second clutch piston, said openings being located radially outside the second clutch oil chamber.

13. A tandem type hydraulic clutch system according to claim 9, further including a canceler oil chamber defined between said first and second clutch pistons.

14. A tandem type hydraulic clutch system according to claim 13, wherein a biasing means is disposed in said canceler oil chamber so as to urge said first and second clutch pistons away from each other.

15. A tandem type hydraulic clutch system comprising:

a first hydraulic clutch having first frictional engagement elements for being urged by a first urging member connected to a first clutch piston which is driven by a hydraulic pressure applied to a first clutch oil chamber; and

a second hydraulic clutch having second frictional engagement elements for being urged by a second urging member connected to a second clutch piston which is driven by a hydraulic pressure applied to a second clutch oil chamber, said first and second hydraulic clutches being axially juxtaposed, wherein

said first and second frictional engagement elements are supported on axially opposite sides of a stopper fixedly mounted on a clutch drum, said first frictional engagement elements being urged toward said stopper by said first urging member, and said second frictional engagement elements being urged toward said stopper by said second urging member, and

wherein said first clutch piston, said first clutch oil chamber, said second clutch piston and said second clutch oil chamber are all located on one axial side of said first and second frictional engagement elements, and a canceler oil chamber is defined between said first and second clutch pistons.