Radial shaft seal assembly with snap in auxiliary member

摘要

A shaft seal assembly includes a metal case having a wall extending cylindrically about a central axis with an annular leg extending radially inwardly from the wall toward the central axis. An elastomeric material is bonded to the leg and a primary seal lip is operably attached to the elastomeric material. The primary seal lip separates an oil side of the assembly from an air side of the seal assembly. The elastomer material has an annular groove formed on the air side of the primary seal lip. The assembly further includes an auxiliary lip subassembly including an annular metal washer with at least one auxiliary lip fixed thereto as a one-piece subassembly. The annular metal washer has an annular outer periphery snappingly received within the annular groove.

主权项

1. A shaft seal assembly, comprising:
a metal case having a wall extending cylindrically about a central axis with an annular leg extending radially inwardly from said wall toward said central axis, said annular leg having a first side facing an oil side of said assembly and a second side facing an air side of said assembly; an elastomeric material bonded to said first and second sides of said leg; a primary seal lip operably attached to said elastomeric material on said first side of said annular leg, said primary seal lip separating said oil side from said air side of said seal assembly; said elastomeric material having at least one annular groove formed on said second side of said annular leg adjacent said annular leg such that said annular leg is between said annular groove and said primary seal lip; and an auxiliary lip subassembly including an annular metal washer with at least one auxiliary lip fixed thereto as a one-piece subassembly, said annular metal washer having an annular outer periphery snappingly received within said at least one annular groove to fix said auxiliary lip to said elastomeric material for rotation therewith.