Patent ID: 8360179
Filing Date: 2013-01-29
Classification: B62D

Abstract:
1. A suspension system for a machine, comprising: a front torsion axle assembly having a first shaft, a first arm connected at a first end to the first shaft, and a first axle connected to a second end of the first arm and extending from the first arm in a direction opposite the first shaft; a rear torsion axle assembly having a second shaft, a second arm connected at a first end to the second shaft, and a second axle connected to a second end of the second arm and extending from the second arm in a direction opposite the second shaft, and a frame configured to support an engine and being connected to an end of the first shaft and an end of the second shaft; an undercarriage connected to an end of the first axle and an end of the second axle; a traction device supported by the undercarriage and driven by the engine; a first bearing connected to the undercarriage and configured to receive the first axle; and a second bearing connected to the undercarriage and configured to receive the second axle; wherein the second ends of the first and second arms are oriented within common angular quadrants defined by a coordinate system having an axis passing through the first ends of the first and second arms and aligned with a travel direction of the machine; the first and second axles are located further away from an engagement of the traction device with a ground surface than the first and second shafts; and the first and second bearings are different types of bearings.