Full traction differential with hybrid gearing
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16H-048/06
F16H-057/08
B26D-001/12
출원번호
US-0112572
(2011-05-20)
등록번호
US-RE44158
(2013-04-16)
발명자
/ 주소
Gleasman, Keith E.
Gleasman, James Y.
Suwijn, Paul W.
출원인 / 주소
Torvec, Inc.
대리인 / 주소
RatnerPrestia
인용정보
피인용 횟수 :
0인용 특허 :
23
초록▼
The compact, all-gear full-traction differential includes meshing pairs of side-gear worms and worm-wheel balance gears having a “hybrid” design. Preferably, the teeth of each side-gear worm have an involute profile but are cut with only plunge feed, while the teeth of the worm-wheel portions of the
The compact, all-gear full-traction differential includes meshing pairs of side-gear worms and worm-wheel balance gears having a “hybrid” design. Preferably, the teeth of each side-gear worm have an involute profile but are cut with only plunge feed, while the teeth of the worm-wheel portions of the balance gears are helicoid worms having tip and root modifications made by a concave-shaped cutter. The side-gear worm teeth have a helix angle equal to or greater than 45° and significantly chamfered ends, and the gears are designed to provide a gear ratio between 1.5:1 and 2.5:1. The numbers of teeth in the spur-gear portion and worm-wheel portion of each balance gear and in each side-gear worm are all divisible by 2 or by 3, preferably by both 2 and 3.
대표청구항▼
1. In a full-traction differential that transfers rotational forces from an external power source to a pair of side-gear worms in a gear complex supported in a housing rotationally driven by the external power source, each side-gear worm comprising a plurality of side-gear teeth, the gear complex co
1. In a full-traction differential that transfers rotational forces from an external power source to a pair of side-gear worms in a gear complex supported in a housing rotationally driven by the external power source, each side-gear worm comprising a plurality of side-gear teeth, the gear complex comprising the side-gear worms rotating about a first axis, each side-gear worm being fixed to a respective one of two output axles received in the housing, at least two sets of paired balance gears, each balance gear of each set being mounted for rotation about an axis substantially perpendicular to the first axis, each balance gear having a pair of spur-gear portions comprising a plurality of spur-gear teeth, spaced apart from a worm-wheel portion comprising a plurality of worm-wheel teeth, each balance gear being in mating engagement with the other balance gear of the pair through the spur-gear portions and in mating engagement with a respective one of the side-gear worms through the worm-wheel portion, wherein the improvement comprises: for each pair of side gear teeth and worm-wheel teeth in mating engagement, either the side-gear teeth or the worm-wheel teeth have an involute profile cut with only plunge feed and the other of either the side-gear teeth or worm-wheel teeth are helicoid worms having a plurality of tip and root modifications made by a concave-shaped cutter;wherein the side-gear worms have a helix angle equal to or greater than 45°; andwherein the side-gear worms and the worm-wheel portions provide a gear ratio between 1.5:1 and 2.5:1. 2. The full-traction differential of claim 1, wherein the side-gear teeth have the involute profile with only plunge feed and the worm-wheel teeth are helicoid worms having tip and root modifications. 3. The full-traction differential of claim 2, wherein the side-gear worms and the worm-wheel portions of the balance gears share a sliding component in mating engagement that decreases the efficiency of transferring torque directed from the external power source to the respective output axles and increases the efficiency of transferring torque directed from the output axles toward the external power source. 4. The full-traction differential of claim 2, wherein each end of each involute tooth of the side-gear worms is significantly chamfered. 5. The full-traction differential of claim 1, wherein the worm-wheel teeth have the involute profile with only plunge feed and the side-gear teeth are helicoid worms having tip and root modifications. 6. The full-traction differential of claim 1, wherein the numbers of the spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 2. 7. The full-traction differential of claim 1, wherein the numbers of the spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 3. 8. The full-traction differential of claim 7, wherein the numbers of the spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 2. 9. The full-traction differential of claim 1, wherein the number of the spur-gear teeth of each balance gear is twice the number of the worm-wheel teeth of the same balance gear. 10. The full-traction differential of claim 9, wherein each spur-gear portion has twelve spur-gear teeth, each worm-wheel portion has six worm-wheel teeth, and each side-gear worm has twelve side-gear teeth. 11. A full traction differential comprising a gear complex of: side-gear worms having a plurality of helical side-gear teeth; paired balance gears having a spur-gear portion comprising spur-gear teeth and a worm-wheel portion comprising helical worm-wheel teeth, each balance gear being in mating engagement with another balance gear through the spur-gear portions and in mating engagement with a side-gear worm through the worm-wheel portion, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 2; the tooth ratio of side-gear worm to balance-gear worm-wheel is 1.5:1 or 2:1; and the helical side gear teeth have a profile consistent with a plunge cut; and wherein the differential has two pairs of balance gears and each balance gear has twice the number of spur-gear teeth as worm-wheel teeth. 12. The differential of claim 11, wherein each side-gear has the same number of teeth as the spur-gear portion of the balance gear. 13. The differential of claim 11, wherein the helix angle of the side-gear worm is greater than 45°. 14. The differential of claim 11, wherein the worm-wheel portion of the balance gear is of uniform outer diameter. 15. A full-traction differential comprising a gear complex of: side-gear worms having a plurality of helical side-gear teeth; paired balance gears having a spur-gear portion comprising spur-gear teeth and a worm-wheel portion comprising helical worm-wheel teeth, each balance gear being in mating engagement with another balance gear through the spur-gear portions and in mating engagement with a side-gear worm through the worm-wheel portion, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 3, and wherein the tooth ratio of side-gear worm to balance gear worm-wheel is 1.5:1 or 2:1; and the helical side gear teeth have a profile consistent with a plunge cut; and wherein the differential has three pairs of balance gears and each balance gear has twice the number of spur-gear teeth as worm-wheel teeth. 16. The differential of claim 15, wherein each side-gear has the same number of teeth as the spur-gear portion of the balance gear. 17. The differential of claim 15, wherein the helix angle of the side-gear worm is greater than 45°. 18. The differential of claim 15, wherein the worm-wheel portion of the balance gear is of uniform outer diameter. 19. A full-traction differential comprising a gear complex of: side gear worms having a plurality of helical side-gear teeth; paired balance gears having a spur-gear portion comprising spur-gear teeth and a worm-wheel portion comprising helical worm-wheel teeth, each balance gear being in mating engagement with another balance gear through the spur-gear portions and in mating engagement with a side-gear worm through the worm-wheel portion, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 2 and by 3; and the helical side gear teeth have a profile consistent with a plunge cut; and wherein each balance gear has twice the number of spur-gear teeth as worm-wheel teeth. 20. The differential of claim 19, wherein each side-gear has the same number of teeth as the spur-gear portion of the balance gear. 21. The differential of claim 19, wherein the side-gear worm has 12 teeth, and the balance gear has a worm-wheel portion of 6 teeth and spur-gear portion of 12 teeth. 22. The differential of claim 19, wherein the tooth ratio of side-gear worm to balance-gear worm-wheel is 2:1. 23. The differential of claim 19, wherein the helix angle of the side-gear worm is greater than 45°. 24. A full-traction differential comprising a gear complex of: side-gear worms having a plurality of helical side-gear teeth; paired balance gears having a spur-gear portion comprising spur-gear teeth and a worm-wheel portion comprising helical worm-wheel teeth, each balance gear being in mating engagement with another balance gear through the spur-gear portions and in mating engagement with a side-gear worm through the worm-wheel portion, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 2 and/or by 3, and wherein the tooth ratio of side-gear worm to balance-gear worm-wheel is 1.5:1, and wherein the helical side gear teeth and/or the helical worm-wheel teeth have a profile consistent with a plunge cut. 25. A full-traction differential comprising a gear complex of: side-gear worms having a plurality of helical side-gear teeth; paired balance gears having a spur-gear portion comprising spur-gear teeth and a worm-wheel portion comprising helical worm-wheel teeth, each balance gear being in mating engagement with another balance gear through the spur-gear portions and in mating engagement with a side-gear worm through the worm-wheel portion, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 2 and/or by 3, and wherein either the helical side gear teeth or the helical worm-wheel teeth have a profile consistent with that formed by a concave cutter, and the other gear has teeth with a profile consistent with that formed by a straight-sided cutter. 26. A method of making a full-traction differential of the type having a gear complex of: side-gear worms having a plurality of side-gear teeth; paired balance gears having a spur-gear portion comprising spur-gear teeth and a worm-wheel portion comprising worm-wheel teeth, said method comprising: cutting the teeth of either the worm-wheel portion of the balance gear or of the side gear with a hob cutting tool having a concave shape, and cutting the teeth of the other gear with a hob cutting tool having a straight sided shape; and arranging each balance gear in mating engagement with another balance gear through the spur-gear portions and in mating engagement with a side-gear worm through the worm-wheel portion; and wherein the cutting of the teeth is performed such that the teeth of the side-gear worm and those of the worm-wheel portion of the balance gear produce a gear ratio from 1.5:1 to 2.5:1; and the teeth of the side gear are cut with a plunge cut. 27. The method of claim 26, wherein the cutting of the teeth of the worm-wheel portion of the balance gear is performed such that the ratio of teeth of the side-gear worm to those of the worm-wheel portion of the balance gear is 1.5:1 or 2:1. 28. The method of claim 26, wherein the teeth of the side-gear worm are cut to a helix angle equal to or greater than 45°. 29. A full-traction differential comprising a gear complex of: side-gear worms having a plurality of helical side-gear teeth; paired balance gears having a spur-gear portion comprising spur-gear teeth and a worm-wheel portion comprising helical worm-wheel teeth, each balance gear being in mating engagement with another balance gear through the spur-gear portions and in mating engagement with a side-gear worm through the worm-wheel portion, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 3, and wherein either the helical side gear teeth or the helical worm-wheel teeth have a profile consistent with that formed by a concave cutter, and the other of the side-gear or worm-wheel has teeth with a profile consistent with that formed by a straight-sided cutter. 30. The differential of claim 29, wherein the differential has three pairs of balance gears. 31. The differential of claim 29, wherein each balance gear has twice the number of spur-gear teeth as worm-wheel teeth. 32. The differential of claim 29, wherein each side-gear has the same number of teeth as the spur-gear portion of the balance gear. 33. The differential of claim 29, wherein the side-gear worm has 12 teeth, and the balance gear has a worm-wheel portion of 6 teeth and spur-gear portion of 12 teeth. 34. The differential of claim 29, wherein the tooth ratio of side-gear worm to balance gear worm-wheel is 1.5:1. 35. The differential of claim 29, wherein the helix angle of the side-gear worm is greater than 45°. 36. The differential of claim 29, wherein the worm-wheel portion of the balance gear is of uniform outer diameter. 37. The differential of claim 29, wherein the spur-gear teeth at either end of the balance gear are in line. 38. A full-traction differential comprising a gear complex of: side-gear worms having a plurality of helical side-gear teeth; paired balance gears having a spur-gear portion comprising spur-gear teeth and a worm-wheel portion comprising helical worm-wheel teeth, each balance gear being in mating engagement with another balance gear through the spur-gear portions and in mating engagement with a side-gear worm through the worm-wheel portion, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 2 and/or by 3, and the tooth ratio of side-gear worm to balance gear worm-wheel is 1.5:1 or 2:1, and the spur-gear teeth at either end of the balance gear are in line. 39. The differential of claim 38, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 3, and the tooth ratio of side-gear worm to balance gear worm-wheel is 1.5:1. 40. A full-traction differential comprising a gear complex of: side-gear worms having a plurality of helical side-gear teeth; paired balance gears having a spur-gear portion comprising spur-gear teeth and a worm-wheel portion comprising helical worm-wheel teeth, each balance gear being in mating engagement with another balance gear through the spur-gear portions and in mating engagement with a side-gear worm through the worm-wheel portion, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 2 and/or by 3; the tooth ratio of side-gear worm to balance gear worm-wheel is 1.5:1 or 2:1; and the number of gear teeth in each spur is 12 or fewer. 41. The differential of claim 40, wherein the teeth of the side gear have a profile consistent with that of a plunge cut. 42. The differential of claim 40, wherein the teeth of the spur gears are in line. 43. The differential of claim 40, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 3; the tooth ratio of side-gear worm to balance gear worm-wheel is 1.5:1. 44. A full-traction differential comprising a gear complex of: side-gear worms having a plurality of helical side-gear teeth; paired balance gears having a spur-gear portion comprising spur-gear teeth and a worm-wheel portion comprising helical worm-wheel teeth, each balance gear being in mating engagement with another balance gear through the spur-gear portions and in mating engagement with a side-gear worm through the worm-wheel portion, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 2 and/or by 3; the tooth ratio of side-gear worm to balance gear worm-wheel is 1.5:1 or 2:1; and wherein the side gears have the same number of teeth as the spur gear portions of the balancing gears. 45. The differential of claim 44, wherein the teeth of the spur gears are in line. 46. The differential of claim 44, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 3; the tooth ratio of side-gear worm to balance gear worm-wheel is 1.5:1; and the number of gear teeth in each spur gear is 12 or fewer. 47. The differential of claim 44, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 3; the tooth ratio of side-gear worm to balance gear worm-wheel is 1.5:1 or 2:1; and the differential has three sets of balancing gears. 48. The differential of claim 44, wherein the number of spur-gear teeth, the worm-wheel teeth, and the side-gear teeth are all divisible by 3; the tooth ratio of side-gear worm to balance gear worm-wheel is 1.5:1 or 2:1; the differential has three sets of balancing gears; and the helical side gear teeth have a profile consistent with that of a plunge cut. 49. The differential of claim 44, wherein the worm-wheel portion of the balance gear is of uniform outer diameter.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (23)
Kimura Junzo (Nagoya JPX) Nakao Toshiyuki (Chiryu JPX), Bias ratio levelling apparatus of a worm gear type differential.
Gleasman Vernon E. (11 Pondview Dr. Pittsford NY 14534) Gleasman Keith E. (11 McCord Woods Dr. Fairport NY 14450) Gleasman James Y. (1701 Laguna Loma Cove Austin TX 78746), No-slip, imposed differential reduction drive.
Gleasman Vernon E. (3808 Kirkwood Rd. Cleveland OH 44121) Benjamin Robert N. (1830 Kathryn Dr. Westlake OH 44145), Torque equalizer or unbalancer for a cross-axis planetary differential gear complex.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.