Fluid-type torque transmission device with lockup clutch
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16H-041/24
B21D-022/18
출원번호
US-0291600
(2002-11-12)
우선권정보
JP-0401213 (2001-12-28); JP-0401214 (2001-12-28)
발명자
/ 주소
Kawamoto, Takeshi
Fujimoto, Shinji
Tanishiki, Hideki
Yoshida, Hajime
Mieda, Kenji
출원인 / 주소
Exedy Corporation
대리인 / 주소
Shinjyu Global IP Counselors. LLP
인용정보
피인용 횟수 :
4인용 특허 :
8
초록▼
A strong lightweight front cover 11 that prevents distortion of a sliding contact surface when the front cover and impeller shell are welded together is provided. The front cover 11 has a radial flange part 44 and an axial flange part 42 that extends from an outside edge of radial flange part 44 . T
A strong lightweight front cover 11 that prevents distortion of a sliding contact surface when the front cover and impeller shell are welded together is provided. The front cover 11 has a radial flange part 44 and an axial flange part 42 that extends from an outside edge of radial flange part 44 . The radial flange part 44 has a sliding contact surface 44 a on an axially facing surface thereof for sliding against a friction facing 76 . The axial flange part 42 has a connection part 51 that connects to the radial flange part 44 and a welding part that is connected by welding to a pump impeller. The various portions of the front cover 11 have differing rigidities and thicknesses.
대표청구항▼
1. A fluid-type torque transmission device comprising:a front cover being fixed to an input shaft, said front cover having,a radial flange part extending in a radial direction, said radial flange part having a sliding contact surface on an axially facing surface thereof, andan axial flange part exte
1. A fluid-type torque transmission device comprising:a front cover being fixed to an input shaft, said front cover having,a radial flange part extending in a radial direction, said radial flange part having a sliding contact surface on an axially facing surface thereof, andan axial flange part extending in an axial direction from a radially outside edge of said radial flange part, said radial and axial flange parts being formed integrally as a unitary member, said axial flange part having a connection part at a first axial end connecting to said radial flange part and a welding part at a second axial end, said axial flange part being formed such that a first region containing said welding part has a lower rigidity than a second region containing said connection part, an axial length of said first region containing said welding part being longer than an axial length of said second region containing said connection part;a turbine being connected to an output shaft;a pump impeller being connected by welding to said front cover at said welding part of said axial flange part; anda lockup clutch having a facing part being configured to slide against said radial flange part of said front cover. 2. The fluid-type torque transmission device with lockup clutch according to claim 1, whereinsaid first region containing said welding part has a first wall thickness that is thinner than a second wall thickness of said second region containing said connection part. 3. The fluid-type torque transmission device according to claim 2, whereinsaid first region containing said welding part occupies at least 30% of the entirety of said axial flange part. 4. The fluid-type torque transmission device according to claim 3, whereinsaid first wall thickness of said first region containing said welding part is 20 to 90% of said second wall thickness of said second region containing said connection part. 5. The fluid-type torque transmission device according to claim 4, whereinsaid first wall thickness of said first region containing said welding part is 30 to 80% of said second wall thickness of said second region containing said connection part. 6. The fluid-type torque transmission device according to claim 2, whereinsaid first region containing said welding part occupies at least 80% of the entirety of said axial flange part. 7. The fluid-type torque transmission device according to claim 6, whereinsaid first wall thickness of said first region containing said welding part is 20 to 90% of said second wall thickness of said second region containing said connection part. 8. The fluid-type torque transmission device according to claim 7, whereinsaid first wall thickness of said first region containing said welding part is 30 to 80% of said second wall thickness of said second region containing said connection part. 9. The fluid-type torque transmission device according to claim 2, whereinsaid first region containing said welding part occupies the entirety of said axial flange part except for said connection part. 10. A method of manufacturing a front cover comprising:forming a sliding contact surface on an axially facing surface of a radially-extending radial flange part of said front cover;forming a welding part connected to a radially outside edge of said radial flange part at a connection part and extending in an axial direction;making a first rigidity of a first region containing said welding part lower than a second rigidity of a second region containing said connection part;making an axial length of said first region containing said welding part longer than an axial length of said second region containing said connection part;configuring said front cover to be fixed to an input shaft; andmaking a fluid-type torque transmission device by assembling said front cover with,a turbine being configured to be connected to an output shaft,a pump impeller connected by welding to said welding part of said front cover, anda lockup clutch having a facing part for sliding against said sliding contact surface of said front cover. 11. The method of manufacturing a front cover according to claim 10, further comprising,making a first wall thickness of a first region containing said welding part thinner than a second wall thickness of a second region containing said connection part. 12. The method of manufacturing a front cover according to claim 11, whereinsaid step for thinning said first wall thickness involves transferring a portion of said first region containing said welding part to said second region containing said connection part. 13. A fluid-type torque transmission device comprising:a front cover being fixed to an input shaft, said front cover having,a radial flange part extending in a radial direction, a first axial wall thickness of said radial flange part being 105 to 200% of a thickness of a sheet material from which said front cover is made, andan axial flange part extending in an axial direction from a radially outside edge of said radial flange part, a second axial wall thickness of an inside circumferential portion of said front cover being 50 to 95% of said thickness of said sheet material from which said front cover is made;a turbine being connected to an output shaft; anda pump impeller connected to said front cover. 14. The fluid-type torque transmission device according to 13 , whereinsaid first axial wall thickness of said radial flange part is 150 to 200% of said thickness of said sheet material from which said front cover is made, andsaid second wall thickness of the inside circumferential portion of said front cover is 50 to 75% of said thickness of said sheet material from which said front cover is made. 15. The fluid-type torque transmission device according to claim 14, whereinsaid second axial wall thickness of said inside circumferential portion of said front cover is 50 to 90% of said first axial wall thickness of said radial flange part. 16. The fluid-type torque transmission device according to claim 15, whereinsaid second wall thickness of said inside circumferential portion of said front cover is 70 to 90% of said first wall thickness of said radial flange part. 17. The fluid-type torque transmission device according to claim 16, whereinsaid axial flange part has a connection part at a first axial end that connects to said radial flange part and a welding part at a second axial end that connects by welding to said pump impeller, andsaid axial flange part is formed such that a first radial wall thickness of a first region containing said welding part is thinner than a second radial wall thickness of a second region containing said connection part. 18. The fluid-type torque transmission device according to claim 13, whereinsaid second axial wall thickness of said inside circumferential portion of said front cover is 50 to 90% of said first axial wall thickness of said radial flange part. 19. The fluid-type torque transmission device according to claim 18, whereinsaid second wall thickness of said inside circumferential portion of said front cover is 70 to 90% of said first wall thickness of said radial flange part. 20. A method of manufacturing a front cover comprising:transferring a portion of a second axial wall thickness at a radially inner portion of said front cover to a first axial wall thickness of a radial flange part of a radially outer portion of said front cover to increase said first axial wall thickness; andconfiguring said front cover to form a fluid-type torque transmission device provided having,a front cover being configured to be fixed to an input shaft,a turbine being configured to be connected to an output shaft, anda pump impeller being configured to be connected to said front cover. 21. The method of manufacturing a front cover according to claim 20, further comprising,transferring a portion of a first radial wall thickness of a tip portion of an axial flange part of said front cover to a base portion of said axial flange part to increase a second radial thickness of said base portion. 22. The method of manufacturing a front cover according to claim 21, further comprising,forming a cylindrical boss that protrudes toward an engine side in an axial direction, said boss being formed integrally at the center of an inside circumferential portion of said front cover. 23. The method of manufacturing a front cover according to claim 20, further comprising,forming a cylindrical boss that protrudes toward an engine side in an axial direction, said boss being formed integrally at the center of an inside circumferential portion of said front cover. 24. The method of manufacturing a front cover according to claim 20, whereinsaid second wall thickness is 50% to 90% of said first wall thickness. 25. The method of manufacturing a front cover according to claim 24, whereinsaid second wall thickness is 70% to 90% of said first wall thickness.
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이 특허에 인용된 특허 (8)
Victoria Alfred Balacan ; Szuba Joseph Anthony ; Wodrich Helmut Arnold Hardow, Cold formed torque converter cover.
Victoria Alfred B. (Warren MI) Szuba Joseph A. (Dearborn MI) Chan Philip P. (Novi MI) Hale William (Dearborn MI) Hayward Susan P. (Belleville MI), Torque converter lockup clutch construction and fabrication method.
Locker Richard W. (Livonia MI) Chan Philip P. (Canton MI) Nagi Paramjit S. (Livonia MI), Welding of parts separated by a gap using a laser welding beam.
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