Sealing Structure With Torsional Damper And Oil Seal

A sealing structure with a torsional damper and an oil seal,

• wherein the torsional damper includes a hub, an annular mass body centered about an axis that covers an outer circumference of the hub, and a damper elastic body that is disposed between the hub and the mass body and elastically connects the hub and the mass body to each other, the torsional damper being attached to one end of a rotary shaft with the hub being inserted into a through-hole of an attachment target part,
• the oil seal includes an annular seal lip centered about the axis, an annular side lip centered about the axis, and an annular flange centered about the axis, the oil seal being attached in the through-hole of the attachment target part to seal between the hub and the through-hole of the attachment target part,
• the hub includes an annular boss part centered about the axis, an annular rim part centered about the axis that is located at an outer periphery of the boss part, and a disk-shaped disk part centered about the axis that connects the boss part and the rim part to each other,
• the disk part is provided with an annular projection that protrudes on the attachment target part side, and
• the seal lip of the oil seal abuts against the boss part in a slidable manner, the side lip of the oil seal extends to an inside of an annular groove formed between the projection and the boss part in the disk part, and the flange of the oil seal covers the projection so that a gap is formed between the flange and the projection.