Patent ID: 6186262
Filing Date: 2001-02-13
Classification: B60K,F16D,Y10S

Abstract:
A hydrostatic mechanical wheel drive comprising:a wheel hub support containing a hydrostatic radial-piston motor (5), the hydrostatic radial-piston motor (5) connected to a wheel hub (3) by a drive shaft to supply drive thereto, and the wheel hub (3) being supported by a first and second wheel bearings on the wheel hub support;the drive shaft (5) having a first end supporting a brake, the brake being biased, by a spring (20) coupled to a brake piston (15), into an engaged position to stop rotation of the wheel hub (3), valves for controlling operation of said radial-piston motor(5) and said brake (7), said brake piston (15) being opened by a fluid pressure to overcome the biasing force of the spring, and the motor (5) the brake (7) and the valves all being housed in a cover (2) within said hub support; andwherein said drive shaft having a second end supporting a sun gear for driving said wheel hub via an epicyclic gear, the epicyclic gear comprising a stationary planet carrier (35) fixed to the wheel hub support and supporting rotatable planetary gears, and the wheel hub supports a ring gear meshing with the rotatable planetary gears for supplying drive from the sun gear to the wheel hub.