A sprocket wheel and drive track assembly of a tracked vehicle includes at least one drive sprocket having a sprocket wheel. A plurality of internal teeth extending laterally therefrom is distributed in a circumferential direction on a periphery thereof at a sprocket pitch from each other. A belt in
A sprocket wheel and drive track assembly of a tracked vehicle includes at least one drive sprocket having a sprocket wheel. A plurality of internal teeth extending laterally therefrom is distributed in a circumferential direction on a periphery thereof at a sprocket pitch from each other. A belt in contact with the at least one drive sprocket has an inner side, an outer side, a longitudinal and a lateral direction. At least two of a plurality of internal lugs distributed on the inner side thereof are engaged by at least two of the plurality of internal teeth of the at least one drive sprocket. The plurality of internal lugs is disposed to form at least one longitudinal row. At least two consecutive internal lugs are disposed at a first pitch from each other. The first pitch is longer than an arc length corresponding to the sprocket pitch.
대표청구항▼
1. A sprocket wheel and drive track assembly of a tracked vehicle, the assembly comprising: at least one drive sprocket, the at least one drive sprocket having a sprocket wheel and a plurality of internal teeth extending laterally therefrom, the plurality of internal teeth being distributed in a cir
1. A sprocket wheel and drive track assembly of a tracked vehicle, the assembly comprising: at least one drive sprocket, the at least one drive sprocket having a sprocket wheel and a plurality of internal teeth extending laterally therefrom, the plurality of internal teeth being distributed in a circumferential direction on a periphery of at least one side of the at least one drive sprocket, the plurality of internal teeth being disposed at a sprocket pitch from each other;a belt in contact with the at least one drive sprocket, the belt having an inner side and an outer side, the belt having a longitudinal direction and a lateral direction; anda plurality of internal lugs distributed on the inner side of the belt, at least two of the plurality of internal lugs being engaged by at least two of the plurality of internal teeth of the at least one drive sprocket, the plurality of internal lugs being disposed to form at least one longitudinal row, at least two consecutive internal lugs of the plurality of internal lugs being spaced by a first pitch, the first pitch being longer than an arc length corresponding to the sprocket pitch. 2. The sprocket wheel and drive track assembly of claim 1, wherein the first pitch is a multiple of the arc length corresponding to the sprocket pitch. 3. The sprocket wheel and drive track assembly of claim 2, wherein the first pitch is double of the arc length corresponding to the sprocket pitch. 4. The sprocket wheel and drive track assembly of claim 1, wherein the at least one drive sprocket is adapted to be rotated so as to engage the belt in rotation, when the at least one sprocket wheel is rotated to complete one revolution, a number of the plurality of internal teeth of the at least one drive sprocket have transferred torque to an internal lug, the number being fewer than all of the plurality of internal teeth. 5. The sprocket wheel and drive track assembly of claim 1, wherein the at least one sprocket wheel has 16 internal teeth on each side thereof. 6. The sprocket wheel and drive track assembly of claim 1, wherein at least two other consecutive internal lugs of the at least one longitudinal row are disposed at a second pitch from each other, the second pitch being shorter than the first pitch, the plurality of internal lugs of the at least one longitudinal row being disposed so as to form a repeating sequence where two second pitches are followed by one first pitch consecutively. 7. The sprocket wheel and drive track assembly of claim 6, wherein the second pitch is one of equal to and smaller than the arc length corresponding to the sprocket pitch. 8. The sprocket wheel and drive track assembly of claim 7, wherein the second pitch is equal to the arc length corresponding to the sprocket pitch. 9. The sprocket wheel and drive track assembly of claim 6, wherein the belt further comprises a plurality of studs extending from the outer side; and at least some of the studs of the plurality of studs are positioned in the longitudinal direction between consecutive internal lugs of the plurality of internal lugs that are disposed at the first pitch from each other. 10. The sprocket wheel and drive track assembly of claim 6, wherein the at least one longitudinal row includes a first row and a second row adjacent to each other in the lateral direction; the first row and the second row each have the repeating sequence; andthe repeating sequences of the first and second rows are longitudinally offset from each other. 11. The sprocket wheel and drive track assembly of claim 10, wherein: the second pitch is half of the first pitch; andthe repeating sequence of the first row is offset from the repeating sequence of the second row such that at least one of the two consecutive lugs of the first row disposed at the first pitch from each other is longitudinally aligned with one of the two consecutive lugs of the second row disposed at the second pitch from one another. 12. The sprocket wheel and drive track assembly of claim 1, wherein the at least one drive sprocket includes a first drive sprocket and a second drive sprocket; the at least one longitudinal row includes a pair of first rows and a pair of second rows;the pair of first rows is adjacent to the pair of the second rows in the lateral direction;the first drive sprocket engages internal lugs of the pair of first rows; andthe second drive sprocket engages internal lugs of the pair of second rows. 13. The sprocket wheel and drive track assembly of claim 1, wherein at any given time, at least one sprocket tooth is immediately surrounded by two consecutive inner track lugs; andat least one other sprocket tooth of the at least one side of the drive sprocket is immediately surrounded by only one other inner track lug. 14. The sprocket wheel and drive track assembly of claim 1, wherein the at least one side of the at least one drive sprocket includes a first side and a second side; at any given time, at least one sprocket tooth on the first side of the at least one drive sprocket is immediately surrounded by two consecutive inner track lugs, andat least one other sprocket tooth on the second side of the at least one drive sprocket is immediately surrounded by only one other inner track lug; andthe at least one other sprocket tooth is aligned with the at least one sprocket tooth. 15. The sprocket wheel and drive track assembly of claim 1, further comprising a plurality of external lugs distributed on the outer side of the belt, the plurality of external lugs being disposed so as to form a plurality of lateral rows, the plurality of lateral rows being disposed at an external lug pitch from each other, wherein the first pitch equals the external lug pitch. 16. A sprocket wheel and drive track assembly of a tracked vehicle, the assembly comprising: at least one drive sprocket, the at least one drive sprocket having a sprocket wheel and a plurality of internal teeth extending laterally therefrom, the plurality of internal teeth being distributed in a circumferential direction on a periphery of at least one side of the at least one drive sprocket, the plurality of internal teeth being disposed at a sprocket pitch from each other;a belt in contact with the at least one drive sprocket, the belt having an inner side and an outer side, the belt having a longitudinal direction and a lateral direction; anda plurality of internal lugs distributed on the inner side of the belt, at least two of the plurality of internal lugs being engaged by at least two of the plurality of internal teeth of the at least one drive sprocket, the plurality of internal lugs being disposed to form at least one longitudinal row, at least two consecutive internal lugs of the plurality of internal lugs being disposed at a first pitch from each other,a plurality of external lugs distributed on the outer side of the belt, the plurality of external lugs being adapted to be in contact with a ground, the plurality of external lugs being disposed so as to form a plurality of lateral rows, the plurality of lateral rows being disposed at an external lug pitch from one another over the entirety of the outer side of the belt, the external lug pitch being longer than an arc length corresponding to the sprocket pitch. 17. The sprocket wheel and drive track assembly of claim 16, wherein: at least two other consecutive internal lugs of the at least one longitudinal row are disposed at a second pitch from each other; the second pitch is shorter than the first pitch;the plurality of internal lugs of the at least one longitudinal row is disposed so as to form a repeating sequence where two second pitches are followed by one first pitch consecutively;the external lug pitch is longer than the second pitch; andthe external lug pitch is equal to the first pitch. 18. The sprocket wheel and drive track assembly of claim 16, wherein: the first pitch is equal to the external lug pitch; andat least one internal lug of the at least two consecutive internal lugs is longitudinally aligned with one lateral row of the plurality of lateral rows of external lugs. 19. The sprocket wheel and drive track assembly of claim 18, wherein at least three other consecutive internal lugs of the at least one longitudinal row are disposed at a second pitch from one another, the at least three other consecutive internal lugs comprising a first internal lug, a second internal lug and a third internal lug, wherein: the first internal lug is longitudinally aligned with a first lateral row of the plurality of lateral rows of external lugs;the third internal lug is longitudinally aligned with a second lateral row of the plurality of lateral rows of external lugs, the first lateral row and the second lateral row being disposed consecutively; andthe second internal lug is disposed between the first and third internal lug. 20. The sprocket wheel and drive track assembly of claim 16 wherein the external lug pitch is double of the arc length corresponding to the sprocket pitch.
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이 특허에 인용된 특허 (11)
Dehnert Douglas K. (St. Hilaire MN), Drive belt assembly for snowmobiles.
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