초록 ▼

A vehicle arranged for raising and lowering the frame relative to the ground wheels for loading comprises a vehicle frame with a hitch at a forward end of the frame and at least two ground wheels for supporting the frame for movement across the ground. Each wheel has a mounting assembly providing dr

A vehicle arranged for raising and lowering the frame relative to the ground wheels for loading comprises a vehicle frame with a hitch at a forward end of the frame and at least two ground wheels for supporting the frame for movement across the ground. Each wheel has a mounting assembly providing driven rotation of a hub carrying the wheel spindle from a raised height of the wheel to a lower locked position. The hub has an internal gear which is driven by a hydraulic motor driving a pinion. The hub can rotate through 180 degrees from a top dead canter to a position just beyond bottom dead center where it engages a stop to support vertical loads. Twisting of the hub and a parallel support plate are prevented by interlocking the members at the bottom position.

대표청구항 ▼

[ I claim:] [1.] A vehicle comprising;a vehicle frame having at least two longitudinal beams parallel to a direction of movement of the vehicle;at least two ground wheels for supporting the frame for movement across the ground;and at least two mounting assemblies each associated with a respective gr

[ I claim:] [1.] A vehicle comprising;a vehicle frame having at least two longitudinal beams parallel to a direction of movement of the vehicle;at least two ground wheels for supporting the frame for movement across the ground;and at least two mounting assemblies each associated with a respective ground wheel for attaching the ground wheel to the frame;each mounting assembly comprising:a first member connected to the frame for movement therewith;and a second pivot member having the wheel mounted thereon for rotation about a wheel axis;the second pivot member being pivotally movably mounted on the first member for pivotal movement relative thereto about a rotation axis parallel to and spaced from the wheel axis so as to move the wheel axis from a first raised position in which the frame is lowered to a position at or adjacent the ground to a second operating position lower than the first position in which the frame is raised for transport;and means for actuating said pivotal movement between the raised position and the second operating position, the actuating means being arranged such that in the first raised position the wheel axis is substantially directly above the rotation axis and in the second operating position the wheel axis is moved through an angle substantially equal to 180 degrees such that the wheel axis is substantially directly below the rotation axis.