Patent ID: 6688417
Filing Date: 2004-02-10
Classification: B60K

Abstract:
An axial piston unit for an integrated wheel hub, comprising:a wheel hub having inboard and outboard side portions, and an open center portion with an axis of rotation, a spindle assembly including a spindle extending within the center portion of the wheel hub, the spindle extending from the center portion of the wheel hub in an inboard direction, the spindle assembly including a hydrostatic rotational power unit and comprising a pivotal swashplate and a servo piston for pivoting the swashplate to vary the hydrostatic power to be imparted to the hydrostatic rotational power unit, an axle shaft extending through the spindle and being connected to the wheel hub and the hydrostatic rotational power unit, for rotation of the wheel hub from rotational power of the hydrostatic rotational power unit, the swashplate being positioned beyond the confines of the center portion of the wheel hub in the inboard direction therefrom, hydraulic passageways in the spindle to provide pressurized fluid to the hydrostatic rotational power unit, and the axle shaft extending through the swashplate.