| 摘要 |
PURPOSE: To provide a sealing device which does not cause the dropping of a spring even if an excessive pressurizing impact force is applied to it by an assembly work, suppresses the influence of the spring by secular change, maintains high sealing performance even if foreign matter is caught into sealing fluid, and also suppress the service life of a dust lip from being lowered by sewage. CONSTITUTION: A sealing part 8 is provided with at least 2-stage main lips 9a and 9b which are inclined and deflected to the sealing side and brought in contact with the outer surface of the cylindrical part 4b of a second seal member 4, an annular sealing area 11, and a dust tip 10 which is sealed and brought in contact with the radial directional part 4c of the second seal member 4 in the outer radial direction. In addition, a screw groove 9c to feed sealing fluid to a sealing side is provided in the lip sliding surface of the main lips 9a and 9b. |
