Nok Corporation

Hisato Yonai

Yuya Sakano

Masahiko Inoue

Takehiro Nakagawa

Hiroki Matsui

Kokichi Hamamoto

Satoshi Yamanaka

Sosuke Ito

Toshiki Watanabe

Hiromi Sugihara

Takumi Yamada

Yu Yamaguchi

A sealing device includes a reinforcing ring having annular shape around an axis line and an elastic body part formed from an elastic body, the elastic body part being attached to the reinforcing ring and having an annular shape around the axis line. The elastic body part includes an annular seal lip and an annular side lip that is provided on an outer side of the seal lip and that extends toward the outer side. In an inner peripheral surface of the side lip on an inner periphery side, at least one circumferential groove which is a groove having an annular shape around the axis line is provided and at least one axial groove which is a groove extending along a direction of the axis line is provided. The circumferential groove and the axial groove are connected with each other.

Sealing device

A sealing apparatus which is capable of preventing static leakage of a target to be sealed without increasing sliding resistance with respect to a shaft, and a surface processing method of a disk member of the sealing apparatus which is capable of processing a surface of the disk member, such as a slinger, provided at the sealing apparatus. A surface processing method of a disk member of a sealing apparatus for forming a plurality of fine spiral grooves on a surface of the disk member provided at the sealing apparatus has a grinding member having a plurality of fine projections that is moved to an outer edge side while the grinding member is pressed against the surface of the disk member which relatively rotates around an axis, and the sealing apparatus includes a slinger at which a plurality of fine spiral grooves are randomly formed on another side surface of a flange portion.

Surface processing method of disk member of sealing apparatus, and sealing apparatus

A sealing apparatus which seals an annular gap of a hole into which a shaft is to be inserted, includes a sealing apparatus body to be fitted into the hole, and a slinger to be attached to the shaft. The sealing apparatus body includes a reinforcing ring annular around an axis line, and an elastic body portion attached to the reinforcing ring and annular around the axis line. The slinger includes a flange portion extending toward an outer periphery side and annular around the axis line. The elastic body portion includes an end-face lip extending on one side in an axis line direction, contacting the flange portion from another side in the axis line direction, and annular around the axis line. At least one groove is formed on the other side of the flange portion, and a plurality of projections are formed side by side in a circumferential direction on an inner periphery surface of the end-face lip extending in a spiral manner in a rotation direction of the shaft from the other side to the one side and being formed on an inner periphery side of a slinger contact portion of the end-face lip.

Sealing apparatus

A sealing apparatusincludes a sealing apparatus bodyand a slinger. The sealing apparatus bodyincludes an annular reinforcing ringand an annular elastic body portion. The slingerincludes a flange portionwhich is an annular portion extending toward an outer periphery side. The elastic body portionincludes an annular end-face lipextending toward an inner side and contacting an outer side surfaceof the flange portion. At least one shallow grooveis formed on the outer side surfaceof the flange portionof the slinger

Growing community of inventors

Fukushima, Japan

Hisato Yonai