IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0281895
(2002-10-25)
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§371/§102 date |
20021120
(20021120)
|
발명자
/ 주소 |
|
대리인 / 주소 |
Knobbe, Martens, Olson &
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
47 |
초록
▼
A continuously variable transmission has a first shaft supporting two first pulleys. The two first pulleys each comprise a fixed disk portion and a moveable disk portion whereby axial movement of the moveable disk portions along the first shaft relative to the fixed disk portions changes an effectiv
A continuously variable transmission has a first shaft supporting two first pulleys. The two first pulleys each comprise a fixed disk portion and a moveable disk portion whereby axial movement of the moveable disk portions along the first shaft relative to the fixed disk portions changes an effective diameter of the two first pulleys. An articulating mechanism connects the moveable disk portions. The articulating mechanism has a body that is connected to the moveable disk portions. A second shaft extends generally parallel to the first shaft. Two second pulleys are journaled about the second shaft. The two second pulleys each has a fixed disk portion and a moveable disk portion. The two fixed disk portions are rotationally connected to the second shaft through a differential. A pair of belts connect the two second pulleys to the two first pulleys
대표청구항
▼
1. A continuously variable transmission comprising:a first shaft supporting two first pulleys, said two first pulleys each comprising a fixed disk portion and a moveable disk portion whereby axial movement of said moveable disk portions along said first shaft relative to said fixed disk portions cha
1. A continuously variable transmission comprising:a first shaft supporting two first pulleys, said two first pulleys each comprising a fixed disk portion and a moveable disk portion whereby axial movement of said moveable disk portions along said first shaft relative to said fixed disk portions changes an effective diameter of said two first pulleys, said moveable disk portions of said two first pulleys being interposed along said first shaft between said fixed disk portions of said two first pulleys, an articulating mechanism connecting said moveable disk portions, said articulating mechanism comprising a body that is connected to said moveable disk portions; a second shaft extending generally parallel to said first shaft, two second pulleys being journaled on said second shaft, said two second pulleys each comprising a fixed disk portion and a moveable disk portion, said two fixed disk portions being rotationally connected to said second shaft through a differential; and a pair of belts connecting said two second pulleys to said two first pulleys. 2. The transmission of claim 1, wherein said belts have a width of about 24 mm.3. The transmission of claim 1, wherein said belts have a width of about 30 mm.4. The transmission of claim 1, wherein said first shaft is a drive shaft and said second shaft is a driven shaft.5. The transmission of claim 1, wherein said first shaft is a driven shaft and said second shaft is a drive shaft.6. The transmission of claim 5, wherein said drive shaft is adapted for slight axial displacement.7. The transmission of claim 1, wherein said differential comprises a pair of bevel gears, said bevel gears being integrally formed with said fixed disk portions of said second pulleys.8. The transmission of claim 1, wherein said differential comprises at least one spider gear that is mounted on a shaft that extends generally normal to said second shaft and that is integrally formed with said second shaft.9. The transmission of claim 8, wherein said differential comprises three spider gears and three respective shafts.10. The transmission of claim 8, wherein said differential comprises four spider gears and four respective shafts.11. The transmission of claim 1, wherein at least one of said second pulleys comprises a double acting cylinder assembly.12. The transmission of claim 11, wherein said double acting cylinder assembly comprises two disc shaped pistons that are axially spaced from each other.13. The transmission of claim 1, wherein an output of said transmission powers a power takeoff and reduction gear.14. The transmission of claim 1, wherein each of said first pulleys further comprise a cylinder that defines a chamber and a piston that is disposed within said chamber and that is secured to movable disk portion with at least one snap ring, said at least one snap ring being secured with a spiral retaining ring.15. The transmission of claim 1, wherein said body of said articulating mechanism is secured to each of said movable disk portions with a toggle member.16. The transmission of claim 15, wherein said toggle member is secured to said moveable disk portion with a threaded fastener.17. The transmission of claim 1, wherein said first shaft and said second shaft each form a flow lumen for hydraulic fluids.18. The transmission of claim 17, wherein each of said lumens contains a labyrinth seal.19. The transmission of claim 17, wherein each of said lumens contains a pair of seals that are spaced apart, said seals being configured to hydraulically balance each of said first shaft and said second shaft.20. The transmission of claim 17, wherein at least one of said lumens contains a biased rod.21. The transmission of claim 1, wherein said two second pulleys are supported by bearings that are mounted in a cage integrally formed on said second shaft.22. The transmission of claim 1, wherein said first shaft is journaled by at least one thrust bearing.23. The transmission of claim 22, wherein said first shaft is coupled to an output gearing arrangement, said thrust bearing being arranged to oppose axial forces created by said output gearing arrangement.24. The transmission of claim 23, wherein said first shaft is journaled by at least one ball bearing.25. The transmission of claim 24, wherein said ball bearing is cooled by lubricant used to control movement of said first pulleys.26. The transmission of claim 1, wherein each of said first pulleys further comprise a cylinder that defines a chamber and a piston that is disposed within said chamber, said piston being biased by a crest-to-crest biasing member.27. The transmission of claim 26, said second shaft forms a flow lumen for hydraulic fluids, said lumen communicating with each of said second pulleys through a communication passage, a pair of seals being disposed to each side of said communication passage at a radial location between second pulleys and said second shaft.28. The transmission of claim 1, wherein a balance dam is positioned within each of said first pulleys.29. The transmission of claim 1, wherein each of said first pulleys further comprise a cylinder that defines a chamber and a piston that is disposed within said chamber, said cylinder having a conical portion that tapers in a direction away from said belts.30. The transmission of claim 1 further comprising a housing that encases said first pulleys, said second pulleys and said belts, each of said first pulleys further comprising a cylinder that defines a chamber and a piston that is disposed within said chamber, said housing comprising a pair of lips that extend inward toward said belts and one of said pair of lips extending inside each of said chambers defined by said cylinder.
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