Nok Corporation

Komatsu Corporation

Kenichi Ajiki

Yoshiyuki Abe

Hisatoshi Odaka

Yoshio Hoshino

Takafumi Nakamura

A sealing device includes: an annular seal that is disposed on an outer periphery of a rod of a hydraulic cylinder further on a side of an extending direction than a cylinder head of the hydraulic cylinder and that has a pair of opposing first facing surfaces; a holding member disposed on an outer periphery of the seal; and a fixing member disposed on an outer periphery of the holding member, the fixing member having a tapered inner surface that contacts an outer surface of the holding member and that has an inner diameter increasing toward a retracting direction.

Sealing device

A sealing system is provided which is intended to achieve an improvement in durability. A dust seal is composed of a first dust seal () and a second dust seal () which is arranged at a location nearer to an atmospheric air side than the first dust seal (), wherein each of the first dust seal () and the second dust seal () has a seal lip formed so as to be slidable with respect to an outer peripheral surface of the shaft. The first dust seal () has seal lips () made of urethane rubber, and the second dust seal () has only a single seal lip () which is made of a rubber higher in flexibility than urethane rubber, and which extends toward the atmospheric air side.

Sealing system

A sealing system is provided which is intended to achieve an improvement in durability. A dust seal is composed of a first dust seal and a second dust seal which is arranged at a location nearer to an atmospheric air side than the first dust seal, wherein each of the first dust seal and the second dust seal has a seal lip formed so as to be slidable with respect to an outer peripheral surface of the shaft. The first dust seal has seal lips made of urethane rubber, and the second dust seal has only a single seal lip which is made of a rubber higher in flexibility than urethane rubber, and which extends toward the atmospheric air side.

Growing community of inventors

Kitaibaraki, Japan

Kenichi Ajiki