CA2865698C - Drive track for snowmobile or tracked vehicle - Google Patents

Drive track for snowmobile or tracked vehicle Download PDF

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Publication number
CA2865698C
CA2865698C CA2865698A CA2865698A CA2865698C CA 2865698 C CA2865698 C CA 2865698C CA 2865698 A CA2865698 A CA 2865698A CA 2865698 A CA2865698 A CA 2865698A CA 2865698 C CA2865698 C CA 2865698C
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Prior art keywords
track
layer
ground
reinforcing fabric
outer side
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CA2865698A
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French (fr)
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CA2865698A1 (en
Inventor
Jules Dandurand
Denis Courtemanche
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Camso Inc
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Camso Inc
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Priority claimed from CA002509059A external-priority patent/CA2509059A1/en
Application filed by Camso Inc filed Critical Camso Inc
Priority to CA2865698A priority Critical patent/CA2865698C/en
Publication of CA2865698A1 publication Critical patent/CA2865698A1/en
Application granted granted Critical
Publication of CA2865698C publication Critical patent/CA2865698C/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/18—Tracks
    • B62D55/24—Tracks of continuously flexible type, e.g. rubber belts
    • B62D55/244—Moulded in one piece, with either smooth surfaces or surfaces having projections, e.g. incorporating reinforcing elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D55/00—Endless track vehicles
    • B62D55/08—Endless track units; Parts thereof
    • B62D55/18—Tracks
    • B62D55/26—Ground engaging parts or elements

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Woven Fabrics (AREA)

Abstract

A track formed of a molded rubber base sandwiching a cord layer, followed by a cross bar and a single layer of ply fabric extending longitudinally of the track.

Description

TITLE OF THE INVENTION
[0001] Drive track for snowmobile or tracked vehicle FIELD OF THE INVENTION
[0002] The present invention pertains to a drive track and, more particularly, to a track for snowmobiles or other tracked vehicles, having an improved construction to decrease horse power, increase top speed and improve durability of the track when the latter is driven at high rotational speeds.
BACKGROUND OF THE INVENTION
[0003] Endless drive tracks for propelling, for example, a snowmobile over snow, ice or other similar ground structure, are known in the art. The mounting of this track to a snowmobile and the mounting of such track on an all-terrain vehicle are well known. The track has a ground engaging outer side and an inner side that receives and supports, on the lower run thereof, a suspension which may consist of a wheel assembly or a slide rail assembly, both of which are also well known in the art.
[0004] Conventionally, the track rotates by means of a motor driven sprocket unit at the forward end of the vehicle and idle drive wheels are mounted at the aft end of the vehicle to support the rear end of the track.
Sprockets engage a series of lugs integrally formed with the inner surface of the track.
[0005] With reference to Figure 1, the endless body is generally formed of a molded rubber base having, embedded therein, a first layer of . , reinforcing fabric 38 extending longitudinally of the track, a series of laterally spaced cord strands 40 which extend between the first layer of fabric and beneath a rod 32, and a second ply 36 of fabric disposed above the rod 32. Such arrangement has been shown to allow good track performance and longevity. It is generally believed that an increased amount of fabric contributes these performances. In areas of the track where there is no rod 32, it is about at mid-thickness of the track where the fiber of the rubber is the strongest, this line of zero stress in cross section of the track separating the region of compressive stress from that of tensile stress being known as the neutral fiber.
[0006]
In spite of efforts in this field, there is still a need for a lighter, cost effective track.
SUMMARY OF THE INVENTION
[0007]
More specifically, there is provided a track for a tracked vehicle, comprising a molded rubber base sandwiching a cord layer, followed by a cross bar and a single layer of ply fabric extending longitudinally of the track.
[0007A]
In accordance with an aspect of the invention, there is provided an endless track for traction of a snowmobile or all-terrain vehicle (ATV). The endless track comprises a rubber-based body having an inner side for facing a drive wheel of the snowmobile or ATV and a ground-engaging outer side for engaging the ground on which the snowmobile or ATV travels. The endless track further comprises a plurality of rubber-based traction projections projecting outwardly from the ground-engaging outer side and a layer of reinforcing fabric embedded within the rubber-based body. The endless track is free of reinforcing fabric extending along the endless track between the inner side and the layer of reinforcing fabric and free of reinforcing fabric extending along the endless track between the ground-engaging outer side and the layer of reinforcing fabric.

[0007B] In accordance with another aspect of the invention, there is provided an endless track for traction of a snowmobile or all-terrain vehicle (ATV).
The endless track comprises a rubber-based body having an inner side for facing a drive wheel of the snowmobile or ATV and a ground-engaging outer side for engaging the ground on which the snowmobile or ATV travels. The endless track further comprises a plurality of rubber-based traction projections projecting outwardly from the ground-engaging outer side and a layer of reinforcing fabric embedded within the rubber-based body. The endless track does not comprise two layers of reinforcing fabric embedded within the rubber-based body and spaced apart from one another.
[0007C] In accordance with another aspect of the invention, there is provided an endless track for traction of a snowmobile or all-terrain vehicle (ATV), the endless track comprises a rubber-based body having an inner side for facing a drive wheel of the snowmobile or ATV and a ground-engaging outer side for engaging the ground on which the snowmobile or ATV travels. The endless track further comprises a plurality of rubber-based traction projections projecting outwardly from the ground-engaging outer side and a layer of reinforcing fabric embedded within the rubber-based body. When operated at a given speed, the endless track consumes less power than if the endless track had an additional layer of reinforcing fabric embedded within the rubber-based body and spaced apart from the layer of reinforcing fabric.
[00070] In accordance with another aspect of the invention, there is provided a track for traction of a vehicle. The track is rubber-based and comprises an inner side for facing a drive wheel to impart motion to the track, a ground-engaging outer side for engaging the ground on which the vehicle travels, and a layer of reinforcing fabric embedded between the inner side and the ground-engaging outer side. The ground-engaging outer side comprises a plurality of traction projections distributed in a longitudinal direction of the track. A segment of the track is free of reinforcing fabric between the inner side and the layer of reinforcing fabric and between the ground-engaging outer side and the layer of reinforcing fabric.
[0007E] In accordance with another aspect of the invention, there is provided a track for traction of a vehicle. The track is rubber-based and comprises an inner side for facing a drive wheel to impart motion to the track, and a ground-engaging outer side for engaging the ground on which the vehicle travels. The ground-engaging outer side comprises a plurality of traction projections distributed in a longitudinal direction of the track. A cross-section of the track normal to the longitudinal direction of the track has a single layer of reinforcing fabric embedded between the inner side and the ground-engaging outer side.
[0007F] In accordance with another aspect of the invention, there is provided a track for traction of a vehicle. The track is rubber-based and comprises an inner side for facing a drive wheel to impart motion to the track and a ground-engaging outer side for engaging the ground on which the vehicle travels. The ground-engaging outer side comprises a plurality of traction projections distributed in a longitudinal direction of the track. The track has a single layer of reinforcing fabric embedded between the inner side and the ground-engaging outer side along at least part of a length of the track.
[0008] Other objects, advantages and features of the present invention will become more apparent upon reading of the following nonrestrictive description of embodiments thereof, given by way of example only with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] In the appended drawings:
[0010] Figure 1 is a cross section of a track as known in the art;
[0011] Figure 2 is a perspective view of a portion of a track according to an embodiment of the present invention;
[0012] Figure 3 is a cross-sectional view of the of Figure 2;
[0013] Figure 4 is a graph of power as a function of speed, used by a track according to the present invention, in a test without traction; and
[0014] Figure 5 is a graph of power as a function of speed, used by a track according to the present invention, in a test including traction.
DESCRIPTION OF EMBODIMENTS OF THE INVENTION
[0015] As shown in Figure 2, a track 10 according to an embodiment of the present invention comprises a ground engaging outer side 12 and an inner side (not seen in Figure 2).
[0016] As seen in the cross-section of Figure 3, the track 10 is formed of a molded rubber base 30 sandwiching a cord layer 32, followed by a cross bar 34 and a single layer of ply fabric 36 extending longitudinally of the track.
[0017] The cross bar 34 may consists of a rod as known in the art, made of composite material for example. It is located at spaced intervals along the longitudinal direction of the track beneath the profiles 14 projecting from the outer side 12 of the track.
[0018] The cord layer 32 comprises a dense strand arrangement formed of a twist arrangement of strands, comprising for example at least 18 strands per inch for a cord of 1.25 mm. The strands include high strength, light weight materials such as man made fibers, such as KevlarTM, nylon, and polyester fabric for example
[0019] The cord layer 32 extends on the rubber base 30 and passes beneath the rod 34.
[0020] The cord layer 32 may be discontinued at locations of the track where the idler wheels pass.
[0021] The ply of fabric 36 includes woven man-made fibers such as nylon for example.
[0022] As shown in Figures 4 and 5, the present track is found to necessitate equal or less power, which goes against the current belief in the industry that the greater the amount of fabric in the track composition, the better the performances.
[0023] People in the art will appreciate that the present invention provides, in contrast to a track standardly made in the art and including an arrangement of rubber, a first ply fabric, cord, rod, second ply fabric and rubber, a track comprising a single layer of ply fabric, yielding a =track of reduced thickness, weight and cost, while maintaining target performances thereof in terms of power and longevity. In particular, the present composition is shown to decrease horse power, increase top speed and improve durability of the track when the latter is driven at high rotational speeds. It has also been found to optimize the so-called neutral fiber bringing it closer to the outer side of the track.
[0024] The present track may be used for a range of tracked vehicles.
[0025] Although the present invention has been described hereinabove by way of embodiments thereof, it may be modified, without departing from the nature and teachings of the subject invention as defined in the appended claims.

Claims (110)

CLAIMS:
1. An endless track for traction of a snowmobile or all-terrain vehicle (ATV), the endless track comprising:
a) a rubber-based body having:
- an inner side for facing a drive wheel of the snowmobile or ATV; and - a ground-engaging outer side for engaging the ground on which the snowmobile or ATV travels;
b) a plurality of rubber-based traction projections projecting outwardly from the ground-engaging outer side; and c) a layer of reinforcing fabric embedded within the rubber-based body;
wherein the endless track is free of reinforcing fabric extending along the endless track between the inner side and the layer of reinforcing fabric and free of reinforcing fabric extending along the endless track between the ground-engaging outer side and the layer of reinforcing fabric.
2. The endless track claimed in claim 1, wherein the layer of reinforcing fabric is closer to the ground-engaging outer side than to the inner side in a thickness direction of the endless track.
3. The endless track claimed in any one of claims 1 and 2, wherein the layer of reinforcing fabric is located within the rubber-based body such that a neutral area separating a region of compressive stress of the endless track and a region of tensile stress of the endless track is closer to the ground-engaging outer side than to the inner side in a thickness direction of the endless track.
4. The endless track claimed in any one of claims 1 to 3, comprising a layer of cords embedded within the rubber-based body, the cords extending generally parallel to one another and in a longitudinal direction of the endless track.
5. The endless track claimed in claim 4, wherein the layer of reinforcing fabric is located between the ground-engaging outer side and the layer of cords.
6. The endless track claimed in claim 4, wherein the layer of reinforcing fabric is located between the inner side and the layer of cords.
7. The endless track claimed in any one of claims 4 to 6, wherein the layer of reinforcing fabric is spaced apart from the layer of cords in a thickness direction of the endless track.
8. The endless track claimed in claim 7, wherein a spacing of the layer of reinforcing fabric and the layer of cords in the thickness direction of the endless track is greater than a thickness of the layer of reinforcing fabric.
9. The endless track claimed in any one of claims 1 to 8, wherein each of the cords comprises a plurality of strands.
10. The endless track claimed in claim 1, comprising a plurality of cross bars embedded within the rubber-based body, spaced apart from one another in a longitudinal direction of the endless track, and extending transversally to the longitudinal direction of the endless track.
11. The endless track claimed in claim 10, wherein the layer of reinforcing fabric is located between the ground-engaging outer side and the cross bars.
12. The endless track claimed in claim 10, wherein the layer of reinforcing fabric is located between the inner side and the cross bars.
13. The endless track claimed in any one of claims 10 to 12, comprising a layer of cords embedded within the rubber-based body, the cords extending generally parallel to one another and in the longitudinal direction of the endless track.
14. The endless track claimed in claim 13, wherein the cross bars are located between the layer of cords and the ground-engaging outer side.
15. The endless track claimed in any one of claims 13 and 14, wherein the layer of reinforcing fabric is located between the layer of cords and the cross bars.
16. The endless track claimed in any one of claims 10 to 15, wherein each of the cross bars comprises composite material.
17. The endless track claimed in any one of claims 1 to 16, wherein the layer of reinforcing fabric comprises reinforcing woven fabric.
18. The endless track claimed in claim 17, wherein the reinforcing woven fabric comprises woven manmade fibers.
19. The endless track claimed in any one of claims 1 to 18, wherein, when operated at a given speed, the endless track consumes less power than if the endless track had an additional layer of reinforcing fabric embedded within the rubber-based body and spaced apart from the layer of reinforcing fabric.
20. The endless track claimed in claim 19, wherein the given speed is above 60 miles per hour.
21. The endless track claimed in any one of claims 1 to 20, wherein respective ones of the rubber-based traction projections are spaced apart from one another in a longitudinal direction of the endless track.
22. The endless track claimed in claim 21, wherein certain ones of the rubber-based traction projections are spaced apart from one another in a widthwise direction of the endless track.
23. The endless track claimed in any one of claims 1 to 22, wherein a particular one of the rubber-based traction projections comprises a first part having a first height and a second part having a second height different from the first height.
24. A snowmobile or ATV comprising the endless track claimed in any one of claims 1 to 23.
25. An endless track for traction of a snowmobile or all-terrain vehicle (ATV), the endless track comprising:
a) a rubber-based body having:
- an inner side for facing a drive wheel of the snowmobile or ATV; and - a ground-engaging outer side for engaging the ground on which the snowmobile or ATV travels;
b) a plurality of rubber-based traction projections projecting outwardly from the ground-engaging outer side; and c) a layer of reinforcing fabric embedded within the rubber-based body;
wherein the endless track does not comprise two layers of reinforcing fabric embedded within the rubber-based body and spaced apart from one another.
26. An endless track for traction of a snowmobile or all-terrain vehicle (ATV), the endless track comprising:
a) a rubber-based body having:
- an inner side for facing a drive wheel of the snowmobile or ATV; and - a ground-engaging outer side for engaging the ground on which the snowmobile or ATV travels;
b) a plurality of rubber-based traction projections projecting outwardly from the ground-engaging outer side; and c) a layer of reinforcing fabric embedded within the rubber-based body;
wherein, when operated at a given speed, the endless track consumes less power than if the endless track had an additional layer of reinforcing fabric embedded within the rubber-based body and spaced apart from the layer of reinforcing fabric.
27. A track for traction of a vehicle, the track being rubber-based and comprising:
- an inner side for facing a drive wheel to impart motion to the track;
- a ground-engaging outer side for engaging the ground on which the vehicle travels, the ground-engaging outer side comprising a plurality of traction projections distributed in a longitudinal direction of the track; and - a layer of reinforcing fabric embedded between the inner side and the ground-engaging outer side;
wherein a segment of the track is free of reinforcing fabric between the inner side and the layer of reinforcing fabric and between the ground-engaging outer side and the layer of reinforcing fabric.
28. The track claimed in claim 27, wherein the layer of reinforcing fabric is closer to a given one of the inner side and the ground-engaging outer side than to the other one of the inner side and the ground-engaging outer side in a thickness direction of the track.
29. The track claimed in claim 27, wherein the layer of reinforcing fabric is located such that a neutral area separating a region of compressive stress of the track and a region of tensile stress of the track is closer to a given one of the inner side and the ground-engaging outer side than to the other one of the inner side and the ground-engaging outer side in a thickness direction of the track.
30. The track claimed in claim 27, wherein the layer of reinforcing fabric is closer to the ground-engaging outer side than to the inner side in a thickness direction of the track.
31. The track claimed in claim 27, wherein the layer of reinforcing fabric is located such that a neutral area separating a region of compressive stress of the track and a region of tensile stress of the track is closer to the ground-engaging outer side than to the inner side in a thickness direction of the track.
32. The track claimed in any one of claims 27 to 31, comprising a layer of cords embedded between the inner side and the ground-engaging outer side, the cords extending generally parallel to one another and in the longitudinal direction of the track.
33. The track claimed in claim 32, wherein the layer of reinforcing fabric is located between the ground-engaging outer side and the layer of cords.
34. The track claimed in claim 32, wherein the layer of reinforcing fabric is located between the inner side and the layer of cords.
35. The track claimed in any one of claims 32 to 34, wherein the layer of reinforcing fabric is spaced apart from the layer of cords in a thickness direction of the endless track.
36. The track claimed in claim 35, wherein a spacing of the layer of reinforcing fabric and the layer of cords in the thickness direction of the track is greater than a thickness of the layer of reinforcing fabric.
37. The track claimed in any one of claims 32 to 36, wherein each of the cords comprises a plurality of strands.
38. The track claimed in claim 27, comprising a plurality of cross bars embedded between the inner side and the ground-engaging outer side, spaced apart from one another in the longitudinal direction of the track, and extending transversally to the longitudinal direction of the track.
39. The track claimed in claim 38, wherein the layer of reinforcing fabric is located between the ground-engaging outer side and the cross bars.
40. The track claimed in claim 38, wherein the layer of reinforcing fabric is located between the inner side and the cross bars.
41. The track claimed in any one of claims 38 to 40, comprising a layer of cords embedded between the inner side and the ground-engaging outer side, the cords extending generally parallel to one another and in the longitudinal direction of the track.
42. The track claimed in claim 41, wherein the cross bars are located between the layer of cords and the ground-engaging outer side.
43. The track claimed in any one of claims 41 and 42, wherein the layer of reinforcing fabric is located between the layer of cords and the cross bars.
44. The track claimed in any one of claims 38 to 43, wherein each of the cross bars comprises composite material.
45. The track claimed in any one of claims 27 to 44, wherein the layer of reinforcing fabric comprises reinforcing woven fabric.
46. The track claimed in claim 45, wherein the reinforcing woven fabric comprises nylon.
47. The track claimed in any one of claims 27 to 46, wherein, when operated at a given speed, the track consumes less power than if the track had an additional layer of reinforcing fabric embedded between the inner side and the ground-engaging outer side and spaced apart from the layer of reinforcing fabric.
48. The track claimed in claim 47, wherein the given speed is above 60 miles per hour.
49. The track claimed in any one of claims 27 to 48, wherein certain ones of the traction projections are spaced apart from one another in a widthwise direction of the track.
50. The track claimed in any one of claims 27 to 49, wherein each of the traction projections has a height that varies along a longitudinal axis of the traction projection.
51. The track claimed in any one of claims 27 to 50, wherein the vehicle is a snowmobile and the track is a snowmobile track.
52. The track claimed in any one of claims 27 to 50, wherein the vehicle is an all-terrain vehicle (ATV) and the track is an ATV track.
53. A snowmobile comprising the track claimed in claim 51.
54. An ATV comprising the track claimed in claim 52.
55. A track for traction of a vehicle, the track being rubber-based and comprising:
- an inner side for facing a drive wheel to impart motion to the track; and - a ground-engaging outer side for engaging the ground on which the vehicle travels, the ground-engaging outer side comprising a plurality of traction projections distributed in a longitudinal direction of the track;
wherein a cross-section of the track normal to the longitudinal direction of the track has a single layer of reinforcing fabric embedded between the inner side and the ground-engaging outer side.
56. The track claimed in claim 55, wherein the single layer of reinforcing fabric is closer to a given one of the inner side and the ground-engaging outer side than to the other one of the inner side and the ground-engaging outer side in a thickness direction of the track.
57. The track claimed in claim 55, wherein the single layer of reinforcing fabric is located such that a neutral area separating a region of compressive stress of the cross-section of the track and a region of tensile stress of the cross-section of the track is closer to a given one of the inner side and the ground-engaging outer side than to the other one of the inner side and the ground-engaging outer side in a thickness direction of the track.
58. The track claimed in claim 55, wherein the single layer of reinforcing fabric is closer to the ground-engaging outer side than to the inner side in a thickness direction of the track.
59. The track claimed in claim 55, wherein the single layer of reinforcing fabric is located such that a neutral area separating a region of compressive stress of the cross-section of the track and a region of tensile stress of the cross-section of the track is closer to the ground-engaging outer side than to the inner side in a thickness direction of the track.
60. The track claimed in any one of claims 55 to 59, comprising a layer of cords embedded between the inner side and the ground-engaging outer side, the cords extending generally parallel to one another and in the longitudinal direction of the track.
61. The track claimed in claim 60, wherein the single layer of reinforcing fabric is located between the ground-engaging outer side and the layer of cords.
62. The track claimed in claim 60, wherein the single layer of reinforcing fabric is located between the inner side and the layer of cords.
63. The track claimed in any one of claims 60 to 62, wherein the single layer of reinforcing fabric is spaced apart from the layer of cords in a thickness direction of the endless track.
64. The track claimed in claim 63, wherein a spacing of the single layer of reinforcing fabric and the layer of cords in the thickness direction of the track is greater than a thickness of the single layer of reinforcing fabric.
65. The track claimed in any one of claims 60 to 64, wherein each of the cords comprises a plurality of strands.
66. The track claimed in claim 55, comprising a plurality of cross bars embedded between the inner side and the ground-engaging outer side, spaced apart from one another in the longitudinal direction of the track, and extending transversally to the longitudinal direction of the track.
67. The track claimed in claim 66, wherein the single layer of reinforcing fabric is located between the ground-engaging outer side and the cross bars.
68. The track claimed in claim 66, wherein the single layer of reinforcing fabric is located between the inner side and the cross bars.
69. The track claimed in any one of claims 66 to 68, comprising a layer of cords embedded between the inner side and the ground-engaging outer side, the cords extending generally parallel to one another and in the longitudinal direction of the track.
70. The track claimed in claim 69, wherein the cross bars are located between the layer of cords and the ground-engaging outer side.
71. The track claimed in any one of claims 69 and 70, wherein the single layer of reinforcing fabric is located between the layer of cords and the cross bars.
72. The track claimed in any one of claims 66 to 71, wherein each of the cross bars comprises composite material.
73. The track claimed in any one of claims 55 to 72, wherein the single layer of reinforcing fabric comprises reinforcing woven fabric.
74. The track claimed in claim 73, wherein the reinforcing woven fabric comprises nylon.
75. The track claimed in any one of claims 55 to 74, wherein, when operated at a given speed, the track consumes less power than if the cross-section of the track had an additional layer of reinforcing fabric embedded between the inner side and the ground-engaging outer side.
76. The track claimed in claim 75, wherein the given speed is above 60 miles per hour.
77. The track claimed in any one of claims 55 to 76, wherein certain ones of the traction projections are spaced apart from one another in a widthwise direction of the track.
78. The track claimed in any one of claims 55 to 77, wherein each of the traction projections has a height that varies along a longitudinal axis of the traction projection.
79. The track claimed in any one of claims 55 to 78, wherein the vehicle is a snowmobile and the track is a snowmobile track.
80. The track claimed in any one of claims 55 to 78, wherein the vehicle is an all-terrain vehicle (ATV) and the track is an ATV track.
81. A snowmobile comprising the track claimed in claim 79.
82. An ATV comprising the track claimed in claim 80.
83. A track for traction of a vehicle, the track being rubber-based and comprising:
- an inner side for facing a drive wheel to impart motion to the track; and - a ground-engaging outer side for engaging the ground on which the vehicle travels, the ground-engaging outer side comprising a plurality of traction projections distributed in a longitudinal direction of the track;
wherein the track has a single layer of reinforcing fabric embedded between the inner side and the ground-engaging outer side along at least part of a length of the track.
84. The track claimed in claim 83, wherein the single layer of reinforcing fabric is closer to a given one of the inner side and the ground-engaging outer side than to the other one of the inner side and the ground-engaging outer side in a thickness direction of the track.
85. The track claimed in claim 83, wherein the single layer of reinforcing fabric is located such that a neutral area separating a region of compressive stress of the track normal to the longitudinal direction of the track and a region of tensile stress of the track is closer to a given one of the inner side and the ground-engaging outer side than to the other one of the inner side and the ground-engaging outer side in a thickness direction of the track.
86. The track claimed in claim 83, wherein the single layer of reinforcing fabric is closer to the ground-engaging outer side than to the inner side in a thickness direction of the track.
87. The track claimed in claim 83, wherein the single layer of reinforcing fabric is located such that a neutral area separating a region of compressive stress of the track and a region of tensile stress of the track is closer to the ground-engaging outer side than to the inner side in a thickness direction of the track.
88. The track claimed in any one of claims 83 to 87, comprising a layer of cords embedded between the inner side and the ground-engaging outer side, the cords extending generally parallel to one another and in the longitudinal direction of the track.
89. The track claimed in claim 88, wherein the single layer of reinforcing fabric is located between the ground-engaging outer side and the layer of cords.
90. The track claimed in claim 88, wherein the single layer of reinforcing fabric is located between the inner side and the layer of cords.
91. The track claimed in any one of claims 88 to 90, wherein the single layer of reinforcing fabric is spaced apart from the layer of cords in a thickness direction of the endless track.
92. The track claimed in claim 91, wherein a spacing of the single layer of reinforcing fabric and the layer of cords in the thickness direction of the track is greater than a thickness of the single layer of reinforcing fabric.
93. The track claimed in any one of claims 88 to 92, wherein each of the cords comprises a plurality of strands.
94. The track claimed in claim 83, comprising a plurality of cross bars embedded between the inner side and the ground-engaging outer side, spaced apart from one another in the longitudinal direction of the track, and extending transversally to the longitudinal direction of the track.
95. The track claimed in claim 94, wherein the single layer of reinforcing fabric is located between the ground-engaging outer side and the cross bars.
96. The track claimed in claim 94, wherein the single layer of reinforcing fabric is located between the inner side and the cross bars.
97. The track claimed in any one of claims 94 to 96, comprising a layer of cords embedded between the inner side and the ground-engaging outer side, the cords extending generally parallel to one another and in the longitudinal direction of the track.
98. The track claimed in claim 97, wherein the cross bars are located between the layer of cords and the ground-engaging outer side.
99. The track claimed in any one of claims 97 and 98, wherein the single layer of reinforcing fabric is located between the layer of cords and the cross bars.
100. The track claimed in any one of claims 94 to 99, wherein each of the cross bars comprises composite material.
101. The track claimed in any one of claims 83 to 100, wherein the single layer of reinforcing fabric comprises reinforcing woven fabric.
102. The track claimed in claim 101, wherein the reinforcing woven fabric comprises nylon.
103. The track claimed in any one of claims 83 to 102, wherein, when operated at a given speed, the track consumes less power than if the track had an additional layer of reinforcing fabric embedded between the inner side and the ground-engaging outer side along the at least part of the length of the track.
104. The track claimed in claim 103, wherein the given speed is above 60 miles per hour.
105. The track claimed in any one of claims 83 to 104, wherein certain ones of the traction projections are spaced apart from one another in a widthwise direction of the track.
106. The track claimed in any one of claims 83 to 105, wherein each of the traction projections has a height that varies along a longitudinal axis of the traction projection.
107. The track claimed in any one of claims 83 to 106, wherein the vehicle is a snowmobile and the track is a snowmobile track.
108. The track claimed in any one of claims 83 to 106, wherein the vehicle is an all-terrain vehicle (ATV) and the track is an ATV track.
109. A snowmobile comprising the track claimed in claim 107.
110. An ATV comprising the track claimed in claim 108.
CA2865698A 2005-06-02 2006-05-11 Drive track for snowmobile or tracked vehicle Active CA2865698C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2865698A CA2865698C (en) 2005-06-02 2006-05-11 Drive track for snowmobile or tracked vehicle

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA002509059A CA2509059A1 (en) 2005-06-02 2005-06-02 Drive track for snowmobile or tracked vehicle
CA2,509,059 2005-06-02
CA2865698A CA2865698C (en) 2005-06-02 2006-05-11 Drive track for snowmobile or tracked vehicle
CA2546314A CA2546314C (en) 2005-06-02 2006-05-11 Drive track for snowmobile or tracked vehicle

Related Parent Applications (1)

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CA2546314A Division CA2546314C (en) 2005-06-02 2006-05-11 Drive track for snowmobile or tracked vehicle

Publications (2)

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CA2865698A1 CA2865698A1 (en) 2006-12-02
CA2865698C true CA2865698C (en) 2017-07-11

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Family Applications (3)

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CA2546314A Active CA2546314C (en) 2005-06-02 2006-05-11 Drive track for snowmobile or tracked vehicle
CA2865693A Active CA2865693C (en) 2005-06-02 2006-05-11 Drive track for snowmobile or tracked vehicle
CA2865698A Active CA2865698C (en) 2005-06-02 2006-05-11 Drive track for snowmobile or tracked vehicle

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA2546314A Active CA2546314C (en) 2005-06-02 2006-05-11 Drive track for snowmobile or tracked vehicle
CA2865693A Active CA2865693C (en) 2005-06-02 2006-05-11 Drive track for snowmobile or tracked vehicle

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Also Published As

Publication number Publication date
CA2546314C (en) 2014-12-09
CA2865693A1 (en) 2006-12-02
CA2865698A1 (en) 2006-12-02
CA2865693C (en) 2017-07-11
CA2546314A1 (en) 2006-12-02

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