IL157036A - Non-slip transmissions particularly useful as continuously-variable transmissions and transmission members thereof - Google Patents
Non-slip transmissions particularly useful as continuously-variable transmissions and transmission members thereofInfo
- Publication number
- IL157036A IL157036A IL157036A IL15703603A IL157036A IL 157036 A IL157036 A IL 157036A IL 157036 A IL157036 A IL 157036A IL 15703603 A IL15703603 A IL 15703603A IL 157036 A IL157036 A IL 157036A
- Authority
- IL
- Israel
- Prior art keywords
- transmission
- coupling elements
- transmission according
- pins
- rotary
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/32—Friction members
- F16H55/52—Pulleys or friction discs of adjustable construction
- F16H55/54—Pulleys or friction discs of adjustable construction of which the bearing parts are radially adjustable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
- F16G13/00—Chains
- F16G13/02—Driving-chains
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
- F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
- F16H9/04—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes
- F16H9/10—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using belts, V-belts, or ropes engaging a pulley provided with radially-actuatable elements carrying the belt
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H9/00—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members
- F16H9/02—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion
- F16H9/24—Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by endless flexible members without members having orbital motion using chains or toothed belts, belts in the form of links; Chains or belts specially adapted to such gearing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Friction Gearing (AREA)
- Gear Transmission (AREA)
- Gears, Cams (AREA)
- Pulleys (AREA)
- Transmissions By Endless Flexible Members (AREA)
- Transmission Devices (AREA)
Claims (101)
1. A continuously-variable transmission, comprising: first and second transmission members each having a group of coupling elements successively engageable to couple the transmission members for movement together; at least one of said transmission members being a rotary member rotatable about a rotary axis; at least one of said groups of coupling elements being radially displaceable towards and away from the rotary axis to change the conversion ratio of said transmission; the coupling elements of one of said groups on one of said transmission members being of a fixed configuration defining an array of projections each of a fixed configuration alternating with depressions each of a fixed configuration; said array of projections and depressions being on a surface of said one transmission member between opposite side faces of said one transmission member, and having the same pitch for every cross-section of said surface perpendicular to the rotary axis; the coupling elements of the other of said groups on the other of said transmission members being of a self-adaptive configuration, each individually movable in opposite directions to adapt itself to the configuration of said fixed configuration coupling elements in all displacement positions of the radially displaceable coupling elements and to effect a non-slip coupling therewith in all said radial displacement positions.
2. The transmission according to Claim 1, wherein the projections and depressions of said fixed-configuration coupling elements at one side face of said one transmission member are in a staggered relationship with respect to the projections and depressions at the opposite side face of said one transmission member, such that each projection in one side face is aligned with a depression in the opposite side face, along a line parallel to the rotary axis.
3. The transmission according to Claim 2, wherein each of said fixed-configuration coupling elements includes a gradual transition from a projection at one side face to a depression at the opposite side.
4. The transmission according to Claim 2, wherein each of said self-adaptive coupling elements is pivotally mounted to said one transmission member such that when the coupling element is pivoted, one end defines a projection engageable with a depression of the fixed-configuration coupling elements, and the opposite end defines a depression engaged by a projection of the fixed-configuration coupling elements.
5. The transmission according to Claim 2, wherein each of said self-adaptive coupling elements includes a disc having a contact edge and rotatable within a holder carried by said one transmission member such that when said disc is rotated, one end of said contact edge defines a projection engageable with a depression of the fixed-configuration coupling elements, and the opposite end defines a depression engaged by a projection of the fixed-configuration coupling elements.
6. The transmission according to Claim 2, wherein each of said fixed-configuration coupling elements includes a stepped transition from a projection ate one side face to a depression at the opposite side face.
7. The transmission according to Claim 2, wherein each of said self-adaptive coupling elements includes a pair of teeth on its opposite ends carried by said one transmission member and displaced together in opposite directions such that when the tooth at one end is displaced in one direction, it defines a projection engageable with a depression of the fixed-configuration coupling elements, and the tooth at the opposite end is displaced in the opposite direction to define a depression engageable by a projection of the fixed-configuration coupling elements.
8. The transmission according to Claim 7, wherein said teeth are mechanically actuated together by a rocking bar.
9. The transmission according to Claim 2, wherein each of said self-adaptive coupling elements includes a shifting plate having teeth on its opposite ends and a space between said teeth, said shifting plate being shiftable within a holder carried by the respective transmission member such that when said plate is shifted in one direction, it makes a tooth at one end effective to define a projection engageable with a depression in the fixed-configuration coupling elements, and the space between said teeth effective to define a depression engageable by a projection of the fixed-configuration coupling elements.
10. The transmission according to Claim 1, wherein the projections and depressions of said fixed-configuration coupling elements at one side face of said one transmission member are in an aligned relation with respect to the projections and depressions at the opposite side face of said one transmission member; and each of said self-adaptive coupling elements on said other transmission member includes two end sections which are offset from each other a distance equal to one-half said pitch to enable said self-adaptive coupling elements to automatically adapt themselves to the configuration of said fixed-configuration coupling elements such as to effect a non-slip coupling therewith in all effective diameters of said rotary member.
11. The transmission according to Claim 1, wherein the projections and depressions of said fixed-configuration coupling elements at one side face of said one transmission member are in an aligned relation with respect to the projections and depressions at the opposite side face of said one transmission member; and each of said self-adaptive coupling elements includes a pivotal assembly on said other transmission member pivotal about an axis perpendicular to the direction of movement of the one transmission member; each of said pivotal assemblies having a pair of spaced arms adapted to engage spaced points on the projections and depressions of said one transmission member, to thereby permit said self-adaptive coupling elements to automatically adapt themselves to the configuration of said fixed-configuration coupling elements such as to effect a non-slip coupling therewith in all effective diameters of said rotary member.
12. The transmission according to Claim 1, wherein the projections and depressions of said fixed-configuration coupling elements at one side face of said one transmission member are in an aligned relation with respect to the projections and depressions at the opposite side face of said one transmission member; and each of said self-adaptive coupling elements includes a pivotal assembly on said other transmission member pivotal about an axis perpendicular to the direction of movement of the one transmission member; each of said pivotal assemblies having a pair of spaced teeth adapted to engage spaced points on the projections and depressions of said one transmission member, to thereby permit said self-adaptive coupling elements to automatically adapt themselves to the configuration of said fixed-configuration coupling elements such as to effect a non-slip coupling therewith in all effective diameters of said rotary member.
13. The transmission according to Claim 1, wherein said rotary member is a variable-diameter toothed wheel carrying said self-adaptive coupling elements in a radially-displaceable manner thereon; and said other transmission member is a fixed-diameter toothed wheel carrying said fixed-configuration coupling elements.
14. The transmission according to Claim 1, wherein said rotary member is a variable-diameter toothed wheel carrying said self-adaptive coupling elements in a radially-displaceable manner thereon; and said other transmission member is a toothed rack carrying said fixed-configuration coupling elements.
15. The transmission according to Claim 1, wherein said rotary member is a variable-diameter toothed wheel carrying said self-adaptive coupling elements in a radially-displaceable manner thereon; and said other transmission member is a flexible chain carrying said fixed-configuration coupling elements.
16. The transmission according to Claim 1, wherein said rotary member is a variable-diameter toothed wheel carrying said self-adaptive coupling elements in a radially-displaceable manner thereon; and said other transmission member is a flexible belt carrying said fixed-configuration coupling elements.
17. The transmission according to Claim 1, wherein said other transmission member carries said self-adaptive coupling elements in a radially-displaceable manner; and said rotary member carries said fixed-configuration coupling elements.
18. The transmission according to Claim 17, wherein said other transmission member includes a disc formed with an annular array of radial slots around a central axis; and said self-adaptive coupling elements include an annular array of pins displaceable within said slots towards and away from said central axis.
19. The transmission according to Claim 18, wherein said rotary member includes a gear assembly having at least one gear meshing with said annular array of pins such that the gear assembly rotates around said central axis of said disc.
20. The transmission according to Claim 19, wherein said disc is movable with respect to said gear assembly to change the radial distance of the gear assembly from said central axis of the disc, and thereby to change the transmission ratio of said transmission.
21. The transmission according to Claim 19, wherein said gear assembly is movable with respect to said disc to change the radial distance of the gear assembly from said central axis of the disc, and thereby to change the transmission ratio of said transmission.
22. The transmission according to Claim 1, wherein said rotary member carries said fixed-configuration coupling elements in a radially-displaceable manner; and said other transmission member carries said self-adaptive coupling elements in an individually displaceable manner to adapt themselves to the configuration of said fixed-configuration coupling elements in all displacement positions thereof.
23. The transmission according to Claim 22, wherein said rotary member is formed with an annular array of radial slots around its rotational axis and includes an annular array of pins radially displaceable within said slots and carrying said fixed configuration coupling elements.
24. The transmission according to Claim 23, wherein said self-adaptive coupling elements carried by said other transmission member are pins pivotally mounted to said other transmission member.
25. The transmission according to Claim 24, wherein said other transmission member is a second rotary member.
26. The transmission according to Claim 25, wherein said second rotary member is a flexible chain or belt carrying said pivotally-mounted pins on its inner surface.
27. The transmission according to Claim 25, wherein said second rotary member is a fixed-diameter toothed wheel and carries said pivotally-mounted pins in the form of an annular array around its outer periphery.
28. The transmission according to Claim 27, wherein both of said transmission members are rotary members; each of said rotary members including a first section carrying said self-adaptive coupling elements, and a second section carrying said fixed-configuration coupling elements; the coupling elements of one of said sections being radially displaceable as a group towards and away from the rotary axis to change the conversion ratio of said transmission; the two sections of each rotary member being in side-by-side relation, and the two rotary members being oriented with respect to each other such that the first section of one rotary member is aligned with and engaged by the second section of the other rotary member, and vice versa.
29. The transmission according to Claim 1, wherein said first and second transmission members are first and second rotary members, respectively; said first rotary member being a variable diameter toothed wheel and including said radially-displaceable coupling elements; said second rotary member being a fixed-diameter toothed wheel.
30. The transmission according to Claim 29, wherein said radially-displaceable coupling elements on said variable-diameter toothed wheel are of said self-adaptive configuration; and said coupling elements on said fixed-diameter toothed wheel are of said fixed configuration.
31. The transmission according to Claim 29, wherein there are a plurality of said variable-diameter toothed wheels fixed to each other to rotate together, and a plurality of said fixed-diameter toothed wheels fixed to each other, such as to enable extending the range of transmission ratios without undue clearances between said projections and depressions, and/or sharing the load.
32. The transmission according to Claim 29, wherein said fixed-diameter toothed wheel is mounted at one end of an arm urging the latter toothed wheel into engagement with the coupling elements of said variable-diameter toothed wheel; said arm being pivotal about an axis rotatably mounting a second fixed-diameter toothed wheel meshing with said first mentioned fixed-diameter toothed wheel such that the pivotal axis of said arm serves as the rotary axis of said second fixed-diameter toothed wheel, which rotary axis remains at a fixed location with respect to the rotary axis of said variable diameter toothed wheel for all transmission ratios of the transmission.
33. The transmission according to Claim 1, wherein said rotary member includes a pair of conical discs each formed with an annular array of radial slots; said radially-displaceable coupling elements being disposed in an annular array between said discs and having their opposite ends slidably received in said slots, such that moving the discs towards or away from each other radially displaces said latter coupling elements to change the effective diameter of the rotary member.
34. The transmission according to Claim 1, wherein said rotary member includes: a first member in the form of a disc having an annular array of radial slots radiating from the rotary axis of the rotary member; and a second member carrying an annular array of triangular plates having inclined edges received in said radial slots and movable therein; said radially-displaceable coupling elements being disposed in an annular array between said radial slots and triangular plates such that moving said first and second members towards or away from each other radially displaces said annular array of coupling elements to change the effective diameter of the rotary member.
35. The transmission according to Claim 34, wherein said second member carrying said triangular plates is a second disc movable towards and away from said disc having the radial slots.
36. The transmission according to Claim 34, wherein said second member carrying said triangular plates includes a bearing member slideably received on the rotary axis of the rotary member.
37. The transmission according to Claim 34, wherein each of said radially-displaceable coupling elements has one end slidably received in a radial slot of said disc, and an opposite end slidably receiving the inclined edge of one of said triangular plates.
38. The transmission according to Claim 1, wherein said rotary member is in the shape of a cone having a small diameter inner end rotatably mounted on the rotary axis, and a large diameter outer end, said cone being formed with a plurality of radial slots extending between said outer end and said inner end; said radially-displaceable coupling elements being movable in said slots to change the effective diameter of said rotary member.
39. The transmission according to Claim 1, wherein said rotary member includes a disc formed with a plurality of radially-extending slots receiving said radially-displaceable coupling elements, and said other transmission member includes a pair of toothed wheels straddling said disc and engageable with the opposite ends of said latter coupling elements.
40. The transmission according to Claim 1, wherein each of said radially-displaceable coupling elements, is spring urged towards the rotary axis of the rotary member.
41. The transmission according to Claim 1, wherein said rotary member includes at least a first disc formed with an annular array of radial straight slots, and a second disc formed with an annular array of radial curved slots; said radially-displaceable coupling elements being disposed in said slots such that rotating one disc with respect to the other radially displaces said coupling elements to change the effective diameter of the rotary member.
42. The transmission according to Claim 41, wherein said rotary member includes a pair of said first and second discs on each of the opposite ends of said coupling elements.
43. The transmission according to Claim 41, wherein each of said annular array of radially-displaceable coupling elements is of said self-adaptive configuration and includes a pin received in said slots, and a contact element pivotally mounted to said pin.
44. The transmission according to Claim 1, wherein: said other transmission member includes a disc formed with an annular array of radial slots; said self-adaptive coupling elements include an annular array of pins displaceable within said slots; and said rotary member includes a gear assembly having a gear meshing with said annular array of pins for rotating the gear assembly about the center of said annular array.
45. The transmission according to Claim 44, wherein said disc and said annular array of pins are also rotatable about the rotary axis.
46. The transmission according to Claim 44, wherein said gear assembly is movable radially with respect to said disc to radially displace the pins in their respective slots, and thereby to change the transmission ratio.
47. The transmission according to Claim 44, wherein said disc is movable radially with respect to said gear assembly to radially displace the pins in their respective slots and thereby to change the transmission ratio.
48. The transmission according to Claim 44, wherein said gear assembly includes a pair of gears on each of the two diametrically opposite sides of said disc, and said disc is movable towards one pair of gears and away from the other pair of gears to radially displace the pins within said slots of the disc, and thereby to change the transmission ratio.
49. The transmission according to Claim 44, wherein the transmission includes a second disc having an annular array of pins, and said gear assembly includes a third gear in axial alignment with said pair of gears such that said pair of gears straddle, and mesh with, the annular array of pins of one of said discs; while said third gear and one of said pair of gears straddle and mesh with the annular array of pins of said second disc.
50. The transmission according to Claim 44, wherein said gear assembly includes two pairs of said gears straddling the opposite sides of said disc, the gears of each pair meshing with ends of the pins projecting through the respective side of the disc.
51. The transmission according to Claim 44, wherein: said gear assembly includes a roller on one side of the annular array of pins, and a pair of gears meshing with the opposite side of said annular array of pins for rotating the gear assembly about the center of said annular array of pins.
52. The transmission according to Claim 44, wherein said other transmission member includes a pair of said discs axially-spaced from each other and formed with an annular array of radial slots displaceably supporting said annular array of pins between said pair of discs; said discs being movable with respect to each other to radially displace said pins, and thereby to change the effective radius of rotation of said gear assembly.
53. The transmission according to Claim 52, wherein said discs are movable towards and away from each other and have conical surfaces displaceably supporting said annular array of pins.
54. The transmission according to Claim 53, wherein said pins have rollers rollable along said conical surfaces for radially displacing said pins.
55. The transmission according to Claim 1, wherein both of said transmission members are rotary members, one of said rotary members carrying on its outer periphery said self-adaptive coupling elements in the form of an annular array of axially-extending pins each pivotal at an intermediate location thereof to enable them to assume said self-adaptive configuration; the other of said rotary members carrying on its outer periphery said fixed-configuration coupling elements in the form of an annular array of axially-extending pins carrying said fixed configuration projections and depressions.
56. The transmission according to Claim 55, wherein said pins carrying said fixed-configuration coupling elements are radially displaceable to change the effective diameter of said other rotary member.
57. The transmission according to Claim 55, wherein each of said pins carrying said fixed-configuration coupling elements includes an element defining a projection, and another element defining a depression spaced from said element defining a projection.
58. The transmission according to Claim 57, wherein said pins carrying said fixed-configuration coupling elements are arranged in two alternating series, the pins in one series including the projections and depressions at its opposite ends, the pins in the other series including the projections and depressions in a mid-portion of the respective pin.
59. The transmission according to Claim 58, wherein the pins defining said self-adaptive coupling elements in said one rotary member are also arranged in two alternating series of short pins alternating with longer pins.
60. The transmission according to Claim 55, wherein one of said rotary members is a variable-diameter toothed wheel, and the other of said rotary members is a fixed-diameter toothed wheel.
61. The transmission according to Claim 55, wherein one of said rotary members is a variable-diameter toothed wheel, and the other of said rotary members is a closed-loop coupling member.
62. The transmission according to Claim 55, wherein each of said rotary members includes two sections in side-by-side relation; a first section of each of said rotary members including the pins of said self-adaptive coupling elements, and a second section of each of said rotary members including the pins of said fixed-configuration coupling elements; said rotary members being oriented such that said first section of one rotary member is aligned with and engaged by said second section of the other rotary member, and vice versa.
63. The transmission according to Claim 1, wherein both of said transmission members are rotary members; each of said rotary members including a first section carrying said self-adaptive coupling elements, and a second section carrying said fixed-configuration coupling elements; the coupling elements of one of said sections being radially displaceable as a group towards and away from the rotary axis to change the conversion ratio of said transmission; the two sections of each rotary member being in side-by-side relation, and the two rotary members being oriented with respect to each other such that the first section of one rotary member is aligned with and engaged by the second section of the other rotary member, and vice versa.
64. The transmission according to Claim 63, wherein said fixed-configuration coupling elements are radially displaceable in its respective rotary member.
65. The transmission according to Claim 1, wherein said other transmission member is a chain coupling said rotary member to a sprocket wheel, said transmission further including a pinion spring-urged against said chain to maintain tautness in said chain.
66. The transmission according to Claim 1, wherein said other transmission member is a flexible closed loop coupling said rotary member to another rotary member of like construction such that an increase in the diameter of one rotary member is accompanied by a decrease in diameter of the other rotary member to maintain tautness in said flexible closed loop.
67. The transmission according to Claim 66, wherein the two rotary members are controlled by a control mechanism which produces a concurrent increase in diameter of said one rotary member and decrease in diameter of said other rotary member to maintain the tautness in said flexible closed loop coupling.
68. The transmission according to Claim 67, wherein said control mechanism includes a pivotal arm coupled at one side to one rotary member to increase its effective diameter and at the opposite side to the other rotary member to decrease its effective diameter.
69. The transmission according to Claim 67, wherein said control mechanism includes a threaded member coupled to each of said rotary members; said threaded members being coupled together and to their respective rotary member to effect concurrent changes in effective diameter of the two rotary members by the same amounts but in opposite direction.
70. The transmission according to Claim 67, wherein one rotary member is coupled to a first gear, and the other rotary member is coupled to a second gear meshing with said first gear; said transmission further including a differential mechanism between said gears effective to enable the range of transmission ratios between said rotary members to be controlled to produce a zero velocity output.
71. The transmission according to Claim 1, wherein said rotary member includes an inner pair of spaced discs joined together by a first ring, and an outer pair of spaced discs joined together by a second ring coaxial with said first ring; one pair of discs being formed with a plurality of radially-extending straight slots, and the other pair of discs being formed with a plurality of radially-extending curved slots; the opposite ends of each of said of coupling elements of said rotary member being received in both a. straight slot and in a curved slot of the respective discs such that rotation of one of said discs in each pair with respect to the other disc in the pair causes said coupling elements to move radially with respect to said discs, according to the direction of rotation, thereby changing the effective diameter of the rotary member.
72. The transmission according to Claim 71, wherein one disc of each pair is coupled to the other disc of the respective pair by a differential gear assembly which is controllable to effect an angular displacement of the two discs, and thereby to change the effective diameter of said rotary member while the transmission is operating.
73. The transmission according to Claim 1, wherein said other transmission member is a variable-diameter toothed wheel having an annular series of said self-adaptive coupling elements radially displaceable towards and away from the axis of the toothed wheel; and said rotary member is a gear assembly meshing with said toothed wheel to rotate around the central axis of said toothed wheel.
74. The transmission according to Claim 73, wherein said gear assembly is located and rotates within said toothed wheel.
75. The transmission according to Claim 73, wherein said gear assembly is located outwardly of and rotates around said toothed wheel.
76. The transmission according to Claim 1, wherein said coupling elements of said rotary member are provided with resilient pads to cushion their contact with the coupling elements of said other transmission member.
77. The transmission according to Claim 1, wherein said coupling elements of said other transmission member are provided with resilient pads to cushion their contact with the coupling elements of said rotary member.
78. The transmission according to Claim 1, wherein the transmission further includes a condition sensor for sensing a predetermined condition, and an automatic control system for automatically displacing said radially-displaceable coupling elements to change the radial distance of said rotary member from the rotary axis, and thereby the transmission ratio of said continuously-variable transmission, in response to said sensed condition.
79. The transmission according to Claim 78, wherein said condition sensor senses velocity of the transmission and automatically controls said transmission ratio in response thereto.
80. The transmission according to Claim 78, wherein said condition sensor senses load on the transmission, and automatically controls said transmission ratio in response thereto.
81. The transmission according to Claim 78, wherein the transmission is included in a vehicle having an engine for driving the vehicle, said condition sensor sensing the load on said engine and automatically controlling said transmission ratio in response thereto.
82. The transmission according to Claim 78, wherein said automatic control system includes a response selector for selecting one of at least two predetermined responses of the automatic control of the transmission ratio of the continuously-variable transmission to the predetermined sensed condition.
83. A continuously-variable transmission, comprising: first and second transmission members each having a group of coupling elements successively engageable to couple the transmission members for movement together; at least one of said transmission members being a rotary member rotatable about a rotary axis; at least one of said groups of coupling elements being radially displaceable towards and away from the rotary axisthe rotary axis to change the conversion ratio of said transmission; the coupling elements of one of said groups being of a fixed configuration defining projections alternating with depressions each of a fixed configuration; the coupling elements of the other of said groups being of a self-adaptive configuration, each individually movable in opposite directions to adapt itself to the configuration of said fixed configuration coupling elemenrs, in all displacement positions of the radially displaceable coupling elements; said other transmission member including a disc formed with an annular array of radial slots; said self-adaptive coupling elements including an annular array of pins displaceable within said slots; and said rotary member including a gear assembly having a gear meshing with said annular array of pins for producing a non-slip coupling therewith while effecting relative rotation between said disc and said gear assembly about the center of said annular array.
84. The transmission according to Claim 83, wherein said disc and said annular array of pins are also rotatable about the rotary axis.
85. The transmission according to Claim 83, wherein said gear assembly is movable radially with respect to said disc to radially displace the pins in their respective slots, and thereby to change the transmission ratio.
86. The transmission according to Claim 83, wherein said disc is movable radially with respect to said gear assembly to radially displace the pins in their respective slots and thereby to change the transmission ratio.
87. The transmission according to Claim 83, wherein said gear assembly includes a pair of gears on each of the two diametrically opposite sides of said disc, and said disc is movable towards one pair of gears and away from the other pair of gears to radially displace the pins within said slots of the disc, and thereby to change the transmission ratio.
88. The transmission according to Claim 83, wherein the transmission includes a second disc having an annular array of pins, and said gear assembly includes a third gear in axial alignment with said pair of gears such that said pair of gears straddle, and mesh with, the annular array of pins of one of said discs; while said third gear and one of said pair of gears straddle and mesh with the annular array of pins of said second disc.
89. The transmission according to Claim 83, wherein said gear assembly includes two pairs of said gears straddling the opposite sides of said disc, the gears of each pair meshing with ends of the pins projecting through the respective side of the disc.
90. The transmission according to Claim 83, wherein: said gear assembly includes a roller on one side of the annular array of pins, and a pair of gears meshing with the opposite side of said annular array of pins for rotating the gear assembly about the center of said annular array of pins.
91. The transmission according to Claim 83, wherein said other transmission member includes a pair of said discs axially-spaced from each other and formed with an annular array of radial slots displaceably supporting said annular array of pins between said pair of discs; said discs being movable with respect to each other to radially displace said pins, and thereby to change the ' effective radius of rotation of said gear assembly.
92. The transmission according to Claim 91, wherein said discs are movable towards and away from each other and have conical surfaces displaceably supporting said annular array of pins.
93. The transmission according to Claim 92, wherein said pins have rollers reliable along said conical surfaces for radially displacing said pins.
94. The transmission according to Claim 83, wherein both of said transmission members are rotary members, one of said rotary members carrying on its outer periphery said self-adaptive coupling elements in the form of an annular array of axially-extending pins each pivotal at an intermediate location thereof to enable them to assume said self-adaptive configuration; the other of said rotary members carrying on its outer periphery said fixed-configuration coupling elements in the form of an annular array of axially-extending pins carrying said fixed configuration projections and depressions.
95. The transmission according to Claim 94, wherein said pins carrying said fixed-configuration coupling elements are radially displaceable to change the effective diameter of said other rotary member.
96. The transmission according to Claim 94, wherein each of said pins carrying said fixed-configuration coupling elements includes an element defining a projection, and another element defining a depression spaced from said element defining a projection.
97. The transmission according to Claim 96, wherein said pins carrying said fixed-configuration coupling elements are arranged in two alternating series, the pins in one series including the projections and depressions at its opposite ends, the pins in the other series including the projections and depressions in a mid-portion of the respective pin.
98. The transmission according to Claim 94, wherein the pins defining said self-adaptive coupling elements in said. one rotary member are also arranged in two alternating series of short pins alternating with longer pins. 86 157036/2
99. The transmission according to Claim 94, wherein one of said rotary members is a variable-diameter toothed wheel, and the other of said rotary members is a fixed-diameter toothed wheel.
100. The transmission according to Claim 94, wherein one of said rotary members is a variable-diameter toothed wheel, and the other of said rotary members is a closed-loop coupling member.
101. The transmission according to Claim 94, wherein each of said rotary members includes two sections in side-by-side relation; a first section of each of said rotary members including the pins of said self-adaptive coupling elements, and a second section of each of said rotary members including the pins of said fixed-configuration coupling elements; said rotary members being oriented such that said first section of one rotary member is aligned with and engaged by said second section of the other rotary member, and vice versa. Benjamin J. Barish Patent Attorney G.E. Ehrlich (1995) Ltd. 11 Menachem Begin Street 52 521 Ramat Gan
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL157036A IL157036A (en) | 2001-01-25 | 2003-07-21 | Non-slip transmissions particularly useful as continuously-variable transmissions and transmission members thereof |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IL14109401A IL141094A0 (en) | 2001-01-25 | 2001-01-25 | Continuous variable transmission |
| IL14422201A IL144222A0 (en) | 2001-07-10 | 2001-07-10 | Continuous variable transmission |
| IL14672001A IL146720A0 (en) | 2001-11-25 | 2001-11-25 | Continuously variable transmission |
| PCT/IL2002/000075 WO2002061306A2 (en) | 2001-01-25 | 2002-01-24 | Non-slip transmission |
| IL157036A IL157036A (en) | 2001-01-25 | 2003-07-21 | Non-slip transmissions particularly useful as continuously-variable transmissions and transmission members thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| IL157036A true IL157036A (en) | 2010-02-17 |
Family
ID=27271946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IL157036A IL157036A (en) | 2001-01-25 | 2003-07-21 | Non-slip transmissions particularly useful as continuously-variable transmissions and transmission members thereof |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1421299A4 (en) |
| JP (1) | JP2004523706A (en) |
| AU (1) | AU2002230055A1 (en) |
| IL (1) | IL157036A (en) |
| WO (1) | WO2002061306A2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005115086A2 (en) * | 2004-05-27 | 2005-12-08 | Cvtron Ltd. | Continuously-variable non-slip transmissions |
| NO331033B1 (en) * | 2005-07-07 | 2011-09-19 | I P Huse As | Device for transporting chain. |
| CN101528495B (en) * | 2005-12-10 | 2012-08-22 | 西夫特隆有限公司 | Transmission system particularly useful as a continuously variable transmission |
| US20090118043A1 (en) * | 2007-11-01 | 2009-05-07 | Iqwind Ltd. | Variable diameter gear device and variable transmissions using such devices |
| JP6182094B2 (en) * | 2014-03-19 | 2017-08-16 | ジヤトコ株式会社 | Continuously variable transmission mechanism |
| JP6092801B2 (en) * | 2014-03-19 | 2017-03-08 | ジヤトコ株式会社 | Continuously variable transmission mechanism |
| JP6182095B2 (en) * | 2014-03-19 | 2017-08-16 | ジヤトコ株式会社 | Continuously variable transmission mechanism |
| CN109798327A (en) * | 2019-02-25 | 2019-05-24 | 电子科技大学 | The new circle-arc tooth gear assembly of rolling bearing gear- |
| CN109973598B (en) * | 2019-03-14 | 2024-03-15 | 曾科锋 | Star-shaped variable diameter multi-speed transmission |
| JP6883831B1 (en) * | 2021-03-11 | 2021-06-09 | 株式会社アイトロニクス | Transmission mechanism |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE364729A (en) * | ||||
| US672962A (en) * | 1900-09-01 | 1901-04-30 | Dudley S Seymour | Variable-speed device. |
| US1428999A (en) * | 1921-11-29 | 1922-09-12 | Tygard James Wallace | Gradually variable power-transmission gear or drive |
| US1601662A (en) | 1923-12-10 | 1926-09-28 | Abbott Geoffrey Joseph | Power-transmission mechanism |
| US1650449A (en) * | 1925-04-15 | 1927-11-22 | Jaeger Max | Positive variable-speed transmission |
| US2201600A (en) * | 1939-07-20 | 1940-05-21 | Foster V Waltz | Transmission device |
| US4810234A (en) * | 1987-05-19 | 1989-03-07 | Kumm Industries, Inc. | Continuously variable transmission |
| US4952196A (en) | 1987-10-21 | 1990-08-28 | Autra-Bike Co., Inc. | Variable diameter sprocket assembly |
| CH680941A5 (en) * | 1988-06-15 | 1992-12-15 | Carl Victor Schaeppi | Stepped gear train for toothed belt - has segmented toothed discs moving to and from centre to change overall disc dia |
| US4875894A (en) * | 1988-09-07 | 1989-10-24 | Clark Paul L | Continuously variable transmission |
| CA2186927C (en) | 1996-01-12 | 1998-09-29 | Noru Gogovitza | Transfer ring and gearset arrangements for no-slip continuously variable transmission |
| US5984814A (en) * | 1997-09-04 | 1999-11-16 | Davenport; Bruce | Variable ratio chain drive transmission |
-
2002
- 2002-01-24 WO PCT/IL2002/000075 patent/WO2002061306A2/en active Search and Examination
- 2002-01-24 AU AU2002230055A patent/AU2002230055A1/en not_active Abandoned
- 2002-01-24 EP EP02711175A patent/EP1421299A4/en not_active Ceased
- 2002-01-24 JP JP2002561220A patent/JP2004523706A/en active Pending
-
2003
- 2003-07-21 IL IL157036A patent/IL157036A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| WO2002061306A2 (en) | 2002-08-08 |
| WO2002061306A3 (en) | 2004-03-11 |
| EP1421299A4 (en) | 2008-03-26 |
| JP2004523706A (en) | 2004-08-05 |
| EP1421299A2 (en) | 2004-05-26 |
| WO2002061306A8 (en) | 2004-04-29 |
| AU2002230055A1 (en) | 2002-08-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FF | Patent granted | ||
| KB | Patent renewed | ||
| MM9K | Patent not in force due to non-payment of renewal fees |