IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0375155
(2003-02-28)
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우선권정보 |
JP-0073006 (2002-03-15) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Shinjyu Global IP Counselors, LLP
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인용정보 |
피인용 횟수 :
0 인용 특허 :
11 |
초록
▼
A piston coupling mechanism in a lockup device having a piston that presses the friction coupling part of a clutch mechanism against the front cover of a fluid-type torque transmission device is provided reduce the amount of work required for assembly. The piston coupling mechanism 76 of the lockup
A piston coupling mechanism in a lockup device having a piston that presses the friction coupling part of a clutch mechanism against the front cover of a fluid-type torque transmission device is provided reduce the amount of work required for assembly. The piston coupling mechanism 76 of the lockup device 7 functions to couple the piston 75 to the front cover 11 such that it rotate integrally with the front cover 11 while being movable in the axial direction. The piston coupling mechanism 76 has a piston lug plate 83, a cover lug plate 84, and a return plate 85. The piston lug plate 83 and the cover lug plate 84 mate in such a manner that they can move in the axial direction but cannot rotate relative to each other. The return plate 85 can apply an axial force against the piston 75 directed toward the transmission and can also limit the axial movement of the piston 75 toward the transmission.
대표청구항
▼
1. A piston coupling mechanism for a lockup device in a fluid-type torque transmission device comprising:a piston being configured to press a friction coupling part of a clutch mechanism against a front cover of the fluid-type torque transmission device, said piston being configured to couple non-ro
1. A piston coupling mechanism for a lockup device in a fluid-type torque transmission device comprising:a piston being configured to press a friction coupling part of a clutch mechanism against a front cover of the fluid-type torque transmission device, said piston being configured to couple non-rotatably and axially movably with said front cover; a first member being fixed to said front cover; a second member being fixed to said piston, said second member being configured to mate non-rotatably and axially movably with said first member; and a third member having, a fixed part being fixed to said first member or said second member, a hook part being configured to mate with said first member or said second member such that said hook part mates with a member different from a member to which said fixed part is fixed, said hook part being configured to mate from an axial direction while deforming elastically and to limit the distance said piston moves away from said front cover in said axial direction, and an elastic part being configured to deform elastically in said axial direction when said piston is pressed against said friction coupling part of said clutch mechanism against said front cover of the fluid-type torque transmission device. 2. The piston coupling mechanism according to claim 1, whereinsaid third member is an annular member on which a plurality of said hook parts and a plurality of said elastic parts are formed. 3. The piston coupling mechanism according to claim 2, whereina plurality of mating parts that mate with said plurality of said hook parts is formed on said first member or second member different from said member to which said fixed part is fixed. 4. The piston coupling mechanism according to claim 3, whereina portion of said member to which said fixed part is fixed non-rotatably and axially movably mates with said plurality of mating parts. 5. The piston coupling mechanism according to claim 4, whereinsaid plurality of hook parts extends axially from said fixed part, and said plurality of elastic parts extends radially from said fixed part. 6. The piston coupling mechanism according to claim 3, whereinsaid plurality of hook parts extends axially from said fixed part, and said plurality of elastic parts extends radially from said fixed part. 7. The piston coupling mechanism according to claim 2, whereinsaid plurality of hook parts extends axially from said fixed part, and said plurality of elastic parts extends radially from said fixed part. 8. The piston coupling mechanism according to claim 1, whereina plurality of mating parts that mate with a plurality of said hook parts is formed on said first member or second member different from said member to which said fixed part is fixed. 9. The piston coupling mechanism according to claim 8, whereina portion of said member to which said fixed part is fixed non-rotatably and axially movably mates with said plurality of mating parts. 10. The piston coupling mechanism according to claim 9, whereinsaid plurality of hook parts extends axially from said fixed part, and said plurality of elastic parts extends radially from said fixed part. 11. The piston coupling mechanism according to claim 8, whereinsaid plurality of hook parts extends axially from said fixed part, and said plurality of elastic parts extends radially from said fixed part. 12. The piston coupling mechanism according to claim 1, whereina plurality of said hook parts extends axially from said fixed part, and a plurality of said elastic parts extends radially from said fixed part. 13. A fluid-type torque transmission device comprising:a front cover having a friction surface; an impeller being fixed to said front cover to form a fluid chamber; a turbine being arranged axially opposite said impeller inside said fluid chamber; and a lockup device comprising, a clutch mechanism having a friction coupling part being configured to be pressed against said friction surface of said front cover, an elastic coupling mechanism being configured to couple elastically said clutch mechanism and said turbine in a rotational direction, a piston being arranged between said front cover and said turbine, said piston being configured to press said friction coupling part against said friction surface, and a piston coupling mechanism comprising, a first member being fixed to said front cover, a second member being fixed to said piston, said second member being configured to mate non-rotatably and axially movably with said first member, and a third member having, a fixed part being fixed to said first member or said second member, a hook part being configured to mate with said first member or said second member such that said hook part mates with a member different from a member to which said fixed part is fixed, said hook part being configured to mate from an axial direction while deforming elastically and to limit the distance said piston moves away from said front cover in said axial direction, and an elastic part being configured to deform elastically in said axial direction when said piston is pressed against said friction coupling part of said clutch mechanism against said front cover. 14. The fluid-type torque transmission device according to claim 13, whereinsaid third member is an annular member on which a plurality of said hook parts and a plurality of said elastic parts are formed. 15. The fluid-type torque transmission device according to claim 14, whereina plurality of mating parts that mate with said plurality of said hook parts is formed on said first member or second member different from said member to which said fixed part is fixed. 16. The fluid-type torque transmission device according to claim 15, whereina portion of said member to which said fixed part is fixed non-rotatably and axially movably mates with said plurality of mating parts. 17. The fluid-type torque transmission device according to claim 16, whereinsaid plurality of hook parts extends axially from said fixed part, and said plurality of elastic parts extends radially from said fixed part. 18. The fluid-type torque transmission device according to claim 15, whereinsaid plurality of hook parts extends axially from said fixed part, and said plurality of elastic parts extends radially from said fixed part. 19. The fluid-type torque transmission device according to claim 14, whereinsaid plurality of hook parts extends axially from said fixed part, and said plurality of elastic parts extends radially from said fixed part. 20. The fluid-type torque transmission device according to claim 13, whereina plurality of said mating parts that mate with a plurality of said hook parts is formed on said first member or second member different from said member to which said fixed part is fixed. 21. The fluid-type torque transmission device according to claim 20, whereina portion of said member to which said fixed part is fixed non-rotatably and axially movably mates with said plurality of mating parts. 22. The fluid-type torque transmission device according to claim 21, whereinsaid plurality of hook parts extends axially from said fixed part, and said plurality of elastic parts extends radially from said fixed part. 23. The fluid-type torque transmission device according to claim 20, whereinsaid plurality of hook parts extends axially from said fixed part, and said plurality of elastic parts extends radially from said fixed part. 24. The fluid-type torque transmission device according to claim 13, whereina plurality of said hook parts extends axially from said fixed part, and a plurality of said elastic parts extends radially from said fixed part. 25. A fluid-type torque transmission device comprising:a front cover having a friction surface; an impeller being fixed to said front cover to form a fluid chamber; a turbine being arranged axially opposite said impeller inside said fluid chamber; and a lockup device comprising, a clutch mechanism having a friction coupling part being configured to be pressed against said friction surface of said front cover, an elastic coupling mechanism being configured to couple elastically said clutch mechanism and said turbine in a rotational direction; a piston being arranged between said front cover and said turbine, said piston being configured to press said friction coupling part against said friction surface; and a piston coupling mechanism comprising, a cover lug plate being fixed to said front cover, a piston lug plate being fixed to said piston, said piston lug plate being configured to mate non-rotatably and axially movably with said cover lug plate, and a return plate having, an annular part being fixed to said cover lug plate or said piston lug plate, a plurality of claw parts being configured to mate with said cover lug plate or said piston lug plate such that said claw parts mate with a lug plate different from a lug plate to which said annular part is fixed, said claw part being configured to mate from an axial direction while deforming elastically and to limit the distance said piston moves away from said front cover in said axial direction, and a plurality of protrusions being configured to deform elastically in said axial direction when said piston is pressed against said friction coupling part of said clutch mechanism against said front cover.
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