The radial piston motor as a wheel motor
This radial piston motor has a static barrel and a rotating housing. It works just like the radial piston motor with the rotating cilinder barrel. The rotating housing is connected to a wheel so in fact this construction represents a wheel with integrated hydraulic motor.
The animation shows how this hydraulic motor operates. The barrel with the eight radial mounted pistons is fixed; the housing and the central sleeve valve rotate. The central sleeve valve takes care for the distribution of the oil.
At the right moment a piston is pushed outwards and the roller which is connected to the piston, pushes the housing with the curved ring aside. This results in a rotation of the housing with the wheel.
By changing the direction of oil supply to the motor the direction of rotation can be changed.