The present invention generally provides a wheel replacing traction assembly which uses, for propulsion, a longitudinally extending endless track disposed around and cooperating with a sprocket wheel, idler and road wheels, and a guide rail.
대표청구항▼
1. A traction assembly for use on a vehicle, said traction assembly comprising: a) a frame having a lower portion and an upper portion, said upper portion being laterally offset with respect to said lower portion, said frame comprising an axle laterally extending from said upper portion;b) a sprocke
1. A traction assembly for use on a vehicle, said traction assembly comprising: a) a frame having a lower portion and an upper portion, said upper portion being laterally offset with respect to said lower portion, said frame comprising an axle laterally extending from said upper portion;b) a sprocket wheel mounted to said axle;c) a longitudinally extending guide rail mounted to said lower portion of said frame, said guide rail comprising a first side and a second side and each of said sides comprising a longitudinally extending rib;d) wheel mounting elements mounted to said guide rail such as to engage one of said ribs, each of said wheel mounting elements comprising a notch for receiving one of said ribs;e) wheels coupled to said mounting elements;f) a traction band disposed around said sprocket wheel, said wheels and said guide rail. 2. A traction assembly as claimed in claim 1, wherein said guide rail has a lower portion, said lower portion being provided with a sliding band. 3. A traction assembly as claimed in claim 1, wherein said axle is substantially vertically aligned with said lower portion of said frame. 4. A traction assembly as claimed in claim 3, wherein said axle comprises at least two portions having different diameters. 5. A traction assembly as claimed in claim 3, wherein said axle comprises three portions having different diameters. 6. A traction assembly as claimed in claim 1, wherein said sprocket wheel is substantially vertically aligned with said guide rail. 7. A traction assembly for use on a vehicle, said traction assembly comprising: a) a sprocket wheel configured to be mounted to said vehicle, said sprocket wheel comprising a central opening;b) a frame comprising a lower portion and an upper portion, said upper portion being laterally offset with respect to said lower portion, said upper portion comprising a fixed axle laterally extending therefrom, said axle having a free extremity configured to face said vehicle when said traction assembly is mounted thereto, said axle being pivotally received into said central opening;c) wheels pivotally mounted to said lower portion of said frame;d) a traction band disposed around said sprocket wheel, said wheels and said frame. 8. A traction assembly as claimed in claim 7, wherein said lower portion of said frame comprises a longitudinally extending guide rail and wherein said wheels are pivotally mounted to said guide rail. 9. A traction assembly as claimed in claim 8, wherein said guide rail comprises a first side and a second side, and wherein each of said sides comprises a longitudinally extending rib. 10. A traction assembly as claimed in claim 9, comprising, for each of said wheels, a wheel mounting element, and wherein said wheel mounting elements are configured to engage said ribs. 11. A traction assembly as claimed in claim 10, wherein each of said wheel mounting elements is provided with a notch for receiving one of said ribs. 12. A traction assembly as claimed in claim 8, wherein said guide rail has a lower portion, said lower portion having mounted thereto a sliding band. 13. A traction assembly as claimed in claim 7, wherein said axle is substantially vertically aligned with said lower portion of said frame. 14. A traction assembly as claimed in claim 13, wherein said sprocket wheel is substantially vertically aligned with said lower portion of said frame. 15. A traction assembly as claimed in claim 7, wherein said axle comprises at least two portions having decreasing diameters toward said free extremity. 16. A traction assembly as claimed in claim 15, wherein said central opening in said sprocket wheel comprises at least two bearings mounted therein. 17. A traction assembly as claimed in claim 16, wherein said traction assembly comprises a retaining element releasably mounted at said free extremity of said axle for securing said sprocket wheel to said axle. 18. A traction assembly as claimed in claim 7, wherein said axle comprises at least three portions having decreasing diameters toward said free extremity. 19. A traction assembly as claimed in claim 18, wherein said central opening in said sprocket wheel comprises at least two bearings mounted therein. 20. A traction assembly as claimed in claim 19, wherein said traction assembly comprises a retaining element releasably mounted at said free extremity of said axle for securing said sprocket wheel to said axle.
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