Patent ID: 9638324
Date: 2017-05-02
CPC Classifications: F16J

Claim:
1. A sealing device comprising: a slinger which is installed to one member among two relatively rotating members; a lip member which is installed to the other member among the two relatively rotating members; said slinger integrally having a tubular portion which is fitted to said one member and a flange portion which extends in a diametrical direction; and said lip member having an end face lip which slidably contacts said flange portion, wherein a bent portion protrudes in an axial direction from said flange portion so as to be circumferentially juxtaposed with said tubular portion, wherein said bent portion has an approximately U-shaped cross section as a whole, and is constructed by an inner peripheral tubular portion, an inverting portion which inverts over about 180 degrees, and an outer peripheral tubular portion, wherein an outer peripheral surface of the inner peripheral tubular portion and an inner peripheral surface of the outer peripheral tubular portion are in contact with each other, wherein each of an inner peripheral surface of the inner peripheral tubular portion and the outer peripheral surface of the outer peripheral tubular portion is a cylindrical surface which is straight in the axial direction, wherein said lip member includes a non-contact lip extending between said inner peripheral surface of said inner peripheral tubular portion of said bent portion and said tubular portion of said slinger, an entirety of said non-contact lip not contacting said slinger, said non-contact lip terminating at a lip end circumferentially spaced apart from said inner peripheral surface of said inner peripheral tubular portion of said bent portion and said tubular portion of said slinger, wherein a first labyrinth structure having first gap is provided between said inverting portion of said bent portion and said lip member proximate a root portion of said end face lip, and wherein a second labyrinth structure including a second gap is continuously provided between said inner peripheral surface of said inner peripheral tubular portion of said bent portion and said non-contact lip and between said non-contact lip and said tubular portion of said slinger.