Hydraulic device with radial pistons comprising at least one ball bearing

A hydraulic device with radial pistons comprising:

• a shaft arranged along an axis;
• a cover forming a casing element, the cover and the shaft being free to rotate with respect to one another;
• a distribution assembly comprising:
• a multi-lobe cam;
• a cylinder block radially facing the cam, said cylinder block comprising a plurality of cylinders wherein are arranged pistons guided so as to slide radially in the respective cylinders of the cylinder block and bearing on the lobes of the cam;
• a distributor configured to exert a thrust force against the cylinder block along the axis of the shaft so as to successively apply a fluid under pressure to said pistons;
• a first mechanical bearing mounted in radial contact between the cover and the shaft, and
• a set of second mechanical bearings comprising at least one second mechanical bearing mounted in radial contact between the cover and the shaft, said set of second mechanical bearings being configured to take up the thrust force exerted by the distributor;
• wherein the first mechanical bearing is a radial contact ball bearing,
• wherein the set of second mechanical bearings is positioned on a first side of the distribution assembly arranged in the thrust direction of the distributor against the cylinder block, and
• wherein the first mechanical bearing is positioned on a second side of the distribution assembly arranged opposite to the thrust direction of the distributor against the cylinder block.