초록 ▼

An improved system in an endless track unit of an all-terrain vehicle. A track is driven with a drive wheel that has sprocket disks drivingly engaging the track with more than two teeth from those disks drivingly engaging the track at any given time. The track is trained around the drive wheel and a

An improved system in an endless track unit of an all-terrain vehicle. A track is driven with a drive wheel that has sprocket disks drivingly engaging the track with more than two teeth from those disks drivingly engaging the track at any given time. The track is trained around the drive wheel and a plurality of undriven guide wheels. A damper wheel may sit downstream of the drive wheel between the drive wheel and the first guide wheel and supports the underside of the track. A preferred embodiment has a sprocket disk with thirteen cogs that have a generally tear-shaped cross section forming teeth of the sprocket, more than two of which drivingly engage a stretch-resistant track at any given time. The track a continuous belt formed of molded rubber with stretch-resistant chords imbedded therein. A replaceable journal liner secured within an axle journal assembly, an improved guide wheel spindle that has a shoulder forming a bearing liner, and ice scrapers positioned on the inside of the track for removing built-up debris may also be installed to further improve operation of the endless track unit.

대표청구항 ▼

[ What is claimed is:] [1.] An endless track unit for a four-track tracked vehicle, the track unit comprising:a track frame;a single track drive sprocket wheel having a drive sprocket with multiple sprocket teeth, said sprocket wheel being rotatably mounted on the frame;plural in-line guide wheels r

[ What is claimed is:] [1.] An endless track unit for a four-track tracked vehicle, the track unit comprising:a track frame;a single track drive sprocket wheel having a drive sprocket with multiple sprocket teeth, said sprocket wheel being rotatably mounted on the frame;plural in-line guide wheels rotatably mounted on the frame below the drive sprocket wheel, the guide wheels including front- and rear-most guide wheels;an endless track trained about the drive and guide wheels and defining a generally triangular-shaped track run with the sprocket wheel at the apex of the run, and a downward pitch line extending in a straight line from the apex to the upper outer periphery of the front most guide wheel along the track run, said track being in driving engagement with more than two teeth of the drive sprocket at the apex such that said teeth disengage said track before the teeth rotate below said downward pitch line, thereby preventing track bounce and track jump.