Inner-ring restraint device of hub bearing for vehicle

An inner-ring restraint device of a hub bearing for a vehicle that restricts an inner ring at the time of manufacturing the hub bearing for the vehicle including a shaft body, the inner ring provided on an outer periphery of the shaft body and an outer ring provided on an outer periphery of the inner ring so as to rotate freely by a plurality of rolling elements, comprising:

• a restraint ring having in a first ring shape formed by a plurality of pieces to be arranged to form the first ring shape coaxial with the shaft body, the restraint ring restricting an outer peripheral portion of the inner ring of the hub bearing by reducing a diameter, and each of the plurality of pieces has an arc-shaped portion that restricts the outer peripheral portion of the inner ring of the hub bearing;
• a support plate having a second ring shape coaxial with the shaft body, being provided so as to move along an axial direction of the shaft body and supporting the plurality pieces so as to respectively move in a state where the plural pieces are arranged in the first ring shape so as to reduce and expand the diameter of the restraint ring at a position closer to the hub bearing for the vehicle than the restraint ring in the axial direction;
• and
• a ring-shaped operation plate arranged on an outer periphery of the restraint ring, being connected to the support plate so as to relatively move in the axial direction and applying a pressure in a direction of reducing the diameter to the plural pieces of the restraint ring respectively by coming relatively close to the support plate.