This invention generally relates to track systems and traction assemblies for use as wheel replacement for normally wheeled vehicles. The track system uses a traction band disposed about a sprocket wheel, idler wheels and road wheels for propulsion. The idler wheels and road wheels are typically piv
This invention generally relates to track systems and traction assemblies for use as wheel replacement for normally wheeled vehicles. The track system uses a traction band disposed about a sprocket wheel, idler wheels and road wheels for propulsion. The idler wheels and road wheels are typically pivotally mounted to a support frame, itself configured to be coupled to the sprocket wheel via a support member. The track system also comprises a movement limiting link mounted both to the support member and to the vehicle frame. The movement limiting link limits longitudinal and lateral movements of the track system, such as to prevent contact between the track system and the vehicle.
대표청구항▼
1. A track system comprising: a) a sprocket wheel configured to be mounted to a wheel hub of a vehicle;b) a substantially longitudinally extending support frame having a front end and a rear end, the support frame comprising idler wheels pivotally mounted at the front and rear ends, and road wheels
1. A track system comprising: a) a sprocket wheel configured to be mounted to a wheel hub of a vehicle;b) a substantially longitudinally extending support frame having a front end and a rear end, the support frame comprising idler wheels pivotally mounted at the front and rear ends, and road wheels pivotally mounted in-between;c) substantially vertically extending support member comprising an upper portion, a middle portion and a lower portion, the upper portion being non-drivingly mounted to the sprocket wheel, the middle portion comprising a first projection extending forwardly and a second projection extending rearwardly, the first projection comprising a first arm extending laterally inwardly, and the second projection comprising a second arm extending laterally inwardly, and the lower portion comprising a first shaft extending laterally inwardly and being pivotally mounted to the support frame, and;d) a link comprising a first end rigidly coupled to the first and second arms of the middle portion of the support member and to the first shaft, and a second end configured to be rigidly mounted to the vehicle;e) an endless traction band disposed around the sprocket wheel, the idler wheel and the road wheels. 2. A track system as claimed in claim 1, wherein the sprocket wheel further comprises a second shaft laterally extending therefrom, and wherein the upper portion is non-drivingly mounted to the second shaft. 3. A track system as claimed in claim 2, wherein the second shaft comprises a radially extending flange configured for attachment to the sprocket wheel. 4. A track system as claimed in claim 3, wherein the flange is configured for attachment to an outer side of the sprocket wheel. 5. A track system as claimed in claim 4, further comprising a disk configured for attachment to an inner side of the sprocket wheel and to the wheel hub of the vehicle. 6. A track system as claimed in claim 5, wherein the flange comprises a first set of apertures, wherein the disk comprises a second set of apertures and a third set of apertures, and wherein the first and second apertures are substantially aligned. 7. A track system as claimed in claim 1, further comprising a member secured to the first and second arms and to the first shaft, and wherein the first end of the link is rigidly coupled to the member. 8. A track system as claimed in claim 1, wherein the first and second arms are substantially parallel. 9. A track system as claimed in claim 1, wherein the sprocket wheel defines a first rotation axis, wherein the first shaft defines a second rotation axis, and wherein the second rotation axis is lower than the first rotation axis. 10. A track system as claimed in claim 9, wherein the second rotation axis is longitudinally displaced with respect to the first rotation axis. 11. A track system as claimed in claim 9, wherein the second rotation axis is parallel to the first rotation axis. 12. A track system as claimed in claim 1, wherein the link comprises a first section and a second section. 13. A track system in combination with a vehicle comprising a frame and at least one wheel hub, the track system comprising: a) a sprocket wheel connected to the at least one wheel hub of the vehicle;b) a substantially longitudinally extending support frame having a front portion, a rear portion, and a middle portion therebetween, the support frame comprising idler wheels pivotally mounted to the front and rear portions, and road wheels pivotally mounted to the middle portion;c) a substantially vertically extending support member comprising an upper portion, a middle portion and a lower portion, the upper portion being non-drivingly connected to the sprocket wheel, the middle portion comprising a first projection extending forwardly and a second projection extending rearwardly, the first projection comprising a first arm extending laterally inwardly, and the second projection comprising a second arm extending laterally inwardly, and the lower portion comprising a first shaft extending laterally inwardly and being pivotally mounted to the support frame;d) a link rigidly connected to the first and second arms and to the first shaft of the support member and to the frame of the vehicle;e) an endless traction band disposed around the sprocket wheel, the idler wheel and the road wheels. 14. A combination as claimed in claim 13, wherein the sprocket wheel comprises a second shaft extending laterally therefrom and comprising a radially extending flange connected to the sprocket wheel. 15. A combination as claimed in claim 14, wherein the flange is connected to an outer side of the sprocket wheel. 16. A combination as claimed in claim 15, further comprising a disk connected to an inner side of the sprocket wheel and to the at least one wheel hub of the vehicle. 17. A combination as claimed in claim 16, wherein the flange comprises a first set of apertures, wherein the disk comprises a second set of apertures and a third set of apertures, and wherein the first and second apertures are substantially aligned. 18. A combination as claimed in claim 13, wherein the support member further comprises a back member connected to the first and second arms. 19. A combination as claimed in claim 18, wherein the link is connected to the back member. 20. A combination as claimed in claim 13, wherein the sprocket wheel defines a first rotation axis, wherein the first shaft defines a second rotation axis, and wherein the second rotation axis is lower than the first rotation axis. 21. A combination as claimed in claim 20, wherein the second rotation axis longitudinally displaced with respect to the first rotation axis. 22. A combination as claimed in claim 20, wherein the second rotation axis is parallel to the first rotation axis.
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