Clutch thrust bearing device including a ball bearing, and driveline system including such a device

A clutch thrust bearing device comprising:

• a ball bearing having a fixed inner ring, a rotatable outer ring, and at least one series of balls located in a raceway chamber disposed between the rings, and
• a piston having a substantially radial portion, the fixed inner ring being in axial abutment against the substantially radial portion, an axial portion extends axially from the substantially radial portion, the axial portion being arranged radially inside the fixed inner ring of the ball bearing, the axial portion being provided with at least one outwards radial projection that extends between the fixed inner ring and the rotatable outer ring,
• wherein the fixed inner ring has a toroidal portion of outside toroidal surface forming an inner raceway for the balls, and a radial portion that outwardly radially extends from the toroidal portion, the radial portion being in axial abutment against the substantially radial portion of piston, the outwards radial projection of the piston cooperating with a radial surface formed by a free edge of the fixed inner ring.

A clutch thrust bearing device comprising:

• a ball bearing having a fixed inner ring, a rotatable outer ring, and at least one series of balls located in a raceway chamber disposed between the rings, and
• a piston having a substantially radial portion, the fixed inner ring being in axial abutment against the substantially radial portion, an axial portion extends axially from the substantially radial portion, the axial portion being arranged radially inside the fixed inner ring of the ball bearing, the axial portion being provided with at least one outwards radial projection that extends between the fixed inner ring and the rotatable outer ring, wherein the outwards radial projection is made from a rubber material that is overmoulded onto the axial portion of the piston.