Sealing device

A sealing device disposed between an inner member and an outer member of a rolling bearing, which rotate relative to each other, for sealing a gap between the inner member and the outer member, the inner member or a member fixed to the inner member comprising a cylindrical part, a flange extending radially outward from the cylindrical part, and an outer cylindrical part connected to the flange, the sealing device comprising:

• an annular rigid part that is adapted to be fixed to an inside of a hole of the outer member, the rigid part made from a rigid material;
• and
• an elastic part fixed to the rigid part, the elastic part made from an elastic material,
• the elastic part comprising:
• a seal lip shaped in a truncated cone ring that is adapted to be in slidable contact with the cylindrical part of the inner member or the member fixed to the inner member,
• multiple bumps formed on an inner peripheral surface of the seal lip, the multiple bumps being adapted to be always in slidable contact with the cylindrical part of the inner member or the member fixed to the inner member for providing clearances between the seal lip and the cylindrical part of the inner member or the member fixed to the inner member in vicinities of the multiple bumps;
• a dust lip shaped in a truncated cone ring that is adapted to be in slidable contact with the cylindrical part of the inner member or the member fixed to the inner member;
• multiple second bumps formed on an inner peripheral surface of the dust lip, the multiple second bumps being adapted to be always in slidable contact with the cylindrical part of the inner member or the member fixed to the inner member for providing clearances between the dust lip and the cylindrical part in vicinities of the multiple second bumps;
• a second dust lip shaped in a truncated cone ring and having an outer peripheral surface that is adapted to be in slidable contact with an inner peripheral surface of the outer cylindrical part of the inner member or the member fixed to the inner member, and
• multiple third bumps formed on the outer peripheral surface of the second dust lip, the multiple third bumps being adapted to be always in slidable contact with the inner peripheral surface of the outer cylindrical part for providing clearances between the second dust lip and the inner peripheral surface of the outer cylindrical part in vicinities of the multiple third bumps.