IP Library › Granted Patent US 8,016,064
Granted Patent B2
US 8,016,064 · App. 12/623,995 · Granted Sep 13, 2011

Snowmobile assembly

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Quick Facts
Patent No.
US 8,016,064
App. No.
12/623,995
Granted
Sep 13, 2011
Kind
B2
Abstract

Embodiments of the present invention relate to an improved snowmobile assembly yielding increased energy absorption in its suspension, improved handling, optimized engine positioning and lower center of gravity. In one embodiment, a rear snowmobile suspension comprises a frame comprising a pair of opposing, longitudinally extending, transversely spaced fixed rails, a pair of rear swing arms pivotably connected on respective first ends to a rear portion of the frame, one on each of a first and a second fixed rail, a front swing arm pivotably connected on a first end to a front portion of the frame on the first fixed rail, and a front drive arm pivotably connected on a first end to a front portion of the frame on the second fixed rail, opposing the front swing arm, wherein the front drive arm houses a portion of the drive assembly for driving the snowmobile.

Claims (41)

1. A rear snowmobile suspension comprising:

a frame comprising a pair of opposing, longitudinally extending, transversely spaced fixed rails;

a pair of rear swing arms pivotably connected on respective first ends to a rear portion of the frame, one on each of a first and a second fixed rail;

a front swing arm pivotably connected on a first end to a front portion of the frame on the first fixed rail; and

a front drive arm pivotably connected on a first end to a front portion of the frame on the second fixed rail, opposing the front swing arm;

wherein the front drive arm houses a portion of a drive assembly for driving the snowmobile.

2. The rear snowmobile suspension of claim 1 , further comprising a drive shaft extending through a second end of the front swing arm and engaged with the portion of the drive assembly housed within the front drive arm.

3. The rear snowmobile suspension of claim 2 , further comprising a driven gear on an end of the drive shaft, adjacent to the front swing arm.

4. The rear snowmobile suspension of claim 3 , further comprising an engine having a driver gear, wherein the driver gear transfers rotational energy to the driven gear via a belt.

5. The rear snowmobile suspension of claim 4 , wherein the engine is moveably connected to at least a portion of the rear snowmobile suspension.

6. The rear snowmobile suspension of claim 1 , wherein the portion of the drive assembly comprises a pinion shaft and a pair of bevel gears, each on an end of the pinion shaft.

7. The rear snowmobile suspension of claim 6 , wherein a first of the pair of bevel gears is in contact with a drive shaft, and wherein a second of the pair of bevel gears is in contact with an axle.

8. The rear snowmobile suspension of claim 7 , wherein the axle rotates at least a drive sprocket for moving a continuous track of the snowmobile.

9. The rear snowmobile suspension of claim 1 , further comprising:

a first pair of opposing bogie wheels affixed to a first bogie wheel shaft extending through the front portion of the frame;

a second pair of opposing bogie wheels affixed to a second bogie wheel shaft extending through the rear portion of the frame; and

a pair of opposing rear bogie wheels, each respectively extending from an end of the first and second fixed rails at the rear portion of the frame.

10. The rear snowmobile suspension of claim 9 , wherein a continuous track of the snowmobile is positioned around at least a drive sprocket on a front portion of the rear snowmobile suspension, the first and second pair of bogie wheels, and the pair of opposing rear bogie wheels.

11. The rear snowmobile suspension of claim 10 , wherein each of the first and second pair of opposing bogie wheels are spring biased in a direction towards a portion of the continuous track in contact with each of the pairs of opposing bogie wheels.

12. The rear snowmobile suspension of claim 1 , wherein the pair of rear swing arms, the front swing arm and the front drive arm are capable of pivoting about respective first ends in a forward direction from a substantially 90 degree position to about a 0 degree position.

13. A rear snowmobile suspension comprising:

a pair of rear swing arms pivotably connected on respective first ends to a rear portion of a frame, one on each of a first and a second fixed rail;

a front swing arm pivotably connected on a first end to a front portion of the frame on the first fixed rail; and

a front drive arm housing a pinion shaft and a pair of bevel gears, each on an end of the pinion shaft, pivotably connected on a first end to a front portion of the frame on the second fixed rail, opposing the front swing arm;

wherein a first of the pair of bevel gears is in contact with a first end of a drive shaft, and wherein a second of the pair of bevel gears is in contact with an axle.

14. The rear snowmobile suspension of claim 13 , wherein the axle rotates at least a drive sprocket for moving a continuous track of the snowmobile.

15. The rear snowmobile suspension of claim 13 , wherein the drive shaft extends through a second end of the front swing arm and engages a driven gear adjacent to the front swing arm.

16. The rear snowmobile suspension of claim 15 , further comprising an engine having a driver gear, wherein the driver gear transfers rotational energy to the driven gear via a belt.

17. The rear snowmobile suspension of claim 16 , wherein the engine is moveably connected to at least a portion of the rear snowmobile suspension.

18. A rear snowmobile suspension comprising:

a pair of rear swing arms pivotably connected on respective first ends to a rear portion of a frame, one on each of a first and a second fixed rail;

a front swing arm pivotably connected on a first end to a front portion of the frame on the first fixed rail;

a front drive arm housing a pinion shaft and a pair of bevel gears, each on an end of the pinion shaft, pivotably connected on a first end to a front portion of the frame on the second fixed rail, opposing the front swing arm;

a drive shaft having a first end in contact with a first of the pair of bevel gears; and

an axle in contact with a second of the pair of bevel gears via a plurality of gears in a gear box;

wherein the axle rotates at least a drive sprocket for moving a continuous track of the snowmobile, and wherein the drive shaft extends through a second end of the front swing arm and engages a driven gear adjacent to the front swing arm.

19. The rear snowmobile suspension of claim 18 , further comprising:

a first pair of opposing bogie wheels affixed to a first bogie wheel shaft extending through the front portion of the frame;

a second pair of opposing bogie wheels affixed to a second bogie wheel shaft extending through the rear portion of the frame; and

a pair of opposing rear bogie wheels, each respectively extending from an end of the first and second fixed rails at the rear portion of the frame.

20. The rear snowmobile suspension of claim 19 , wherein a continuous track of the snowmobile is positioned around at least a drive sprocket on a front portion of the rear snowmobile suspension, the first and second pair of bogie wheels, and the pair of opposing rear bogie wheels.

Continuity (1)
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