STRUT BEARING UNIT FOR A MOTOR VEHICLE

A strut bearing unit for a motor vehicle includes a lower cup for supporting a suspension spring, an upper cup for coupling with a top mount which provides a connection to a chassis of the motor vehicle, and a bearing interposed between the upper cup and the lower cup. The upper cup has an inner cylindrical surface and a first set of protruding ribs formed on the inner cylindrical surface for providing a connection between the top mount and the upper cup. The first set of protruding ribs extends axially and is circumferentially distributed around the inner cylindrical surface. Each rib of the first set of protruding ribs has a first axial portion and a second axial portion, the first axial portion and the second axial portion having different thicknesses in the radial direction.