Patent ID: 6406043
Filing Date: 2002-06-18
Classification: B60B,B60G,B60Y,B62D

Abstract:
An agricultural vehicle for moving over agricultural terrain comprising:a vehicle frame structure for supporting elements to be transported; a pair of ground wheels each having a wheel hub mounted on a respective side of the frame structure for rotation of the ground wheel about the wheel hub for transporting the frame structure across the ground in a direction of travel; two suspension assemblies each for supporting a respective side of the frame structure on a respective one of the wheel hubs for suspension movement of the frame structure in a suspension direction generally upwardly and downwardly relative to the respective hub in response to changes in ground level; each suspension assembly comprising: a first member carried on the respective side of the frame structure; a second member attached to the respective hub; a pair of pivotal links interconnecting the first and second members to allow generally up and down suspension movement of the second member relative to the first member; the second member being mounted outwardly of the first member such that the pivotal links extend outwardly from the first member to the second member and such that the first member, the second member and the links all lie generally in a common vertical plane at right angles to the direction of travel; the second member comprising a substantially vertical leg extending downwardly from an upper end at the pivotal links to a lower end at the hub so that the hub is located downwardly of the frame structure; one of the pivotal links being mounted above the other; each of the pivotal links being mounted on the first member for pivotal movement relative thereto about a respective pivot axis parallel to the direction of travel and each of the pivotal links being mounted on the second member for pivotal movement relative thereto about a respective pivot axis parallel to the direction of travel; and a spring connected between the first and second member so as to generate a spring bias in a direction along the suspension direction to support the respective side of the frame structure on the respective hub.