Patent ID: 8356680
Filing Date: 2013-01-22
Classification: B60K,B60Y,B62D

Abstract:
1. A machine comprising: a machine body; a final drive assembly attached to each side of the machine body; a track chain supported by the final drive assembly; the final drive assembly includes sprocket hub mounted for rotation on a fixed hub; the final drive assembly including a seal positioned between the fixed hub and the sprocket hub; the fixed hub and the sprocket hub defining a seal protection passageway that extends between an outer surface of the final drive assembly and the seal; the seal protection passageway includes a labyrinth located between the machine body and the seal along a rotation axis of the sprocket hub; the outer surface includes a valley between a sprocket mount of the sprocket hub and a machine mount of the fixed hub; and the seal protection passageway has an opening that opens at a greater radius than a minimum radius of the valley, and a segment of the labyrinth being further from the rotation axis than the opening.