Sealing device

A sealing device configured to be mounted on a rolling bearing provided for a wheel bearing device, the wheel bearing device comprising an axle pipe through which a drive shaft is inserted in an axial direction and the rolling bearing rotatably supporting a wheel and being fitted onto an outer circumferential stepped portion formed on an outer circumference of the axle pipe, the rolling bearing comprising an outer ring and an inner ring opposing each other in a radial direction,

• the sealing device comprising:
• a slinger member comprising a first cylindrical portion, a disk portion, and a second cylindrical portion, the first cylindrical portion being fitted to an outer circumferential face of the inner ring that is a fixed member, the disk portion extending to an outer diameter side from an end portion on one side in the axial direction of the first cylindrical portion, the second cylindrical portion extending from an end portion on an outer diameter side of the disk portion to an other side in the axial direction;
• a core body member comprising a cylindrical portion and a disk portion, the cylindrical portion being fitted to an inner circumferential face of the outer ring that is a rotatable member, the disk portion extending to an inner diameter side from an end portion on the other side in the axial direction of the cylindrical portion;
• and
• a seal body made of an elastic material, the seal body comprising a seal body cylindrical portion fixed to an inner circumferential face of the cylindrical portion and a seal lip slidably contacting the slinger member,
• wherein an inner circumferential face of the seal body cylindrical portion has an inclined portion constituting a labyrinth of which diameter gradually increases toward the one side from the other side in the axial direction between the inner circumferential face of the seal body cylindrical portion and the second cylindrical portion.