An endless track assembly that mounts to a wheeled vehicle. The assembly provides
1) a track suspension having fixed or adjustable, independently biased sets of
idler wheels to vary the track contour without affecting track tension, 2) an eccentric
bearing housing at a drive sprocket controls track tension, 3) a contoured peripheral
edge at the drive sprocket prevents ice and mud buildup, 4) rubber-coated, plastic
idler wheels facilitate track movement, 5) a multi-vehicle compatible adapter mounting
plate accommodates a variety of vehicles, 6) a rotation limited torsion coupler
and/or rotation limiting coupler arms prevent track contact with the vehicle, 7)
a locking steering arm coupler prevents loss of steering control, and 8) shaped
track lugs and channels clear and direct debris away from the track suspension
and drive assembly. The improved suspension particularly supports sets of idler
wheels in pivotal relation to the track support frame and resiliently biases a
pre-tensioned rocker arm that links adjacent suspension arms mounted to the adjoining
idler wheels. Suspension arm movement induces expansion and contraction of tension
springs coupled to the rocker arms to augments shape changes at the track contact
surface to optimize traction and steering control.
