公开(公告)号：US20180209546A1

公开(公告)日：2018-07-26

申请号：US15928478

申请日：2018-03-22

申请人： NOK CORPORATION

发明人： Hideaki NAGAHAMAYA ,  Kokichi HAMAMOTO ,  Masayuki TANIDA ,  Takehiro NAKAGAWA

IPC分类号： F16J15/3232 ,  F16J15/3236

CPC分类号： F16J15/3232 ,  F16J15/3204 ,  F16J15/3212 ,  F16J15/3236

摘要： A sealing device includes an annular reinforcing ring and an elastic body part, and the elastic body part has an annular seal lip, an annular dust lip, and an annular side lip. The side lip extends toward the outer side on an outer periphery side of the dust lip, and includes a distal end portion, a middle portion, and a root portion. The root portion is an annular portion, the middle portion is a portion that is outside of the root portion, and an annular portion that increases in diameter toward an outward side, and the distal end portion is a portion that is outside the middle portion, and an annular portion that increases in diameter toward an outward side. The distal end portion is bent to an inner periphery side from the middle portion.

公开(公告)号：US20130087978A1

公开(公告)日：2013-04-11

申请号：US13690409

申请日：2012-11-30

申请人： NOK Corporation

发明人： Takehiro NAKAGAWA

IPC分类号： F16J15/32

CPC分类号： F16J15/32 ,  F16C33/80 ,  F16J15/164 ,  F16J15/3264

摘要： A sealing device (1) having an oil seal (10) mounted to non-rotatable housing (2) and also having a slinger (20) mounted to a rotating body (5) on the inner peripheral side of the oil seal (10) so as to be located on the axially outer side of the oil seal (10), the oil seal (10) having an oil-resistant seal lip (13) slidably in close contact with the outer peripheral surface of the rotating body (5), wherein a seal ring (30) axially opposed to the slinger (20) is provided outward of the oil-resistant seal lip (13), a gap (G3) being formed between the seal ring (30) and the slinger (20) so as to decrease to the outer diameter side. The construction prevents muddy water etc. from entering from the outside (A) into a slide section (S1) of the oil-resistant seal lip (13).

摘要翻译： 一种密封装置（1），其具有安装在不可旋转壳体（2）上的油封（10），并且还具有安装在油封（10）的内周侧的旋转体（5）上的抛油环（20） 为了位于油封（10）的轴向外侧，具有与旋转体（5）的外周面紧密接触的防油密封唇（13）的油封（10） ，其中与所述抛油环（20）轴向相对的密封环（30）设置在所述耐油密封唇（13）的外侧，在所述密封环（30）和所述抛油环（20）之间形成有间隙（G3） 从而减小到外径侧。 该结构防止泥水等从外侧（A）进入到防油密封唇（13）的滑动部（S1）。

公开(公告)号：US20180259072A1

公开(公告)日：2018-09-13

申请号：US15779443

申请日：2016-11-25

申请人： NOK CORPORATION

发明人： Akihiro KOMYO ,  Shinichi ISHIBASHI ,  Takehiro NAKAGAWA

IPC分类号： F16J15/3204 ,  F16J15/3244 ,  F16J15/40

摘要： A seal device prevents sealing fluid on the inner-machine side from leaking to the outer-machine side between a housing and a rotating shaft inserted into a shaft hole on the housing. The seal lip is attached to the inner periphery of the shaft hole to slidingly contact the seal flange attached to the outer periphery of the rotating shaft. The thread groove, which exerts a fluid pumping action when the shaft is rotating, is provided on the seal flange so as to intersect with a lip end of the seal lip. The thread groove is formed so as to have a relatively small cross-sectional area in a sliding area in the seal flange that the seal lip comes in sliding contact with and have a relatively large cross-sectional area in an inner peripheral side area located on an inner peripheral side more than the sliding area.

公开(公告)号：US20170122438A1

公开(公告)日：2017-05-04

申请号：US15311926

申请日：2015-05-15

申请人： NOK CORPORATION

发明人： Kokichi HAMAMOTO ,  Takehiro NAKAGAWA ,  Hideaki NAGAHAMAYA ,  Shiho SATO

IPC分类号： F16J15/3232

CPC分类号： F16J15/3232 ,  F16J15/32 ,  F16J15/322 ,  F16J15/3224 ,  F16J15/3244 ,  F16J15/3252 ,  F16J15/3276

摘要： A sealing device capable of preventing turnover of a dust lip and damage to a dust lip caused by insertion of a shaft. A bumper portion (125) made of a rubber-like elastic body and reducing an impact that the dust lip (122) receives from the shaft when the shaft is inserted into the sealing device (100) is provided on the side opposite to the sealed area (O) with respect to the dust lip (122), and an inner diameter of a tip of the bumper portion (125) on an inner peripheral side is set to be larger than an outer diameter of a part of the shaft on which a main lip (121) and the dust lip (122) slide and to be smaller than an inner diameter of a part having the largest inner diameter in a portion connecting the main lip (121) and the dust lip (122).

公开(公告)号：US20190277403A1

公开(公告)日：2019-09-12

申请号：US16423250

申请日：2019-05-28

申请人： NOK CORPORATION

发明人： Yuya SAKANO ,  Hiroki MATSUI ,  Kokichi HAMAMOTO ,  Takehiro NAKAGAWA ,  Hisato YONAI ,  Masahiko INOUE

IPC分类号： F16J15/3244 ,  F16J15/3204

摘要： 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.

公开(公告)号：US20170314681A1

公开(公告)日：2017-11-02

申请号：US15523608

申请日：2015-11-09

申请人： NOK CORPORATION

发明人： Takehiro NAKAGAWA

IPC分类号： F16J15/00 ,  F16J15/3212 ,  F16J15/34 ,  F16J15/36

CPC分类号： F16J15/002 ,  F16J15/3204 ,  F16J15/3212 ,  F16J15/34 ,  F16J15/3436 ,  F16J15/36

摘要： A sealing device includes a metal ring, a main lip, an annular elastic body, a sliding ring, and biasing means. The metal ring is hermetically fixed to a housing. The main lip is bonded to the metal ring and is slidably in close contact with an outer periphery surface of a rotating body inserted through an inner circumference of the housing. The annular elastic body is bonded to the metal ring on an outer side of the main lip, and stretchable in an axial direction. The sliding ring is provided at an end portion of the annular elastic body on a side opposite the metal ring, and is slidably in close contact with a seal flange attached to an outer periphery of the rotating body. The biasing means is configured to elastically press the sliding ring against the seal flange, thereby maintaining stable sealability over an extended period of time.

公开(公告)号：US20200011423A1

公开(公告)日：2020-01-09

申请号：US16576891

申请日：2019-09-20

申请人： NOK CORPORATION

发明人： Sosuke ITO ,  Masahiko INOUE ,  Yuya SAKANO ,  Hiroki MATSUI ,  Kokichi HAMAMOTO ,  Takehiro NAKAGAWA ,  Hisato YONAI

IPC分类号： F16J15/3204 ,  F16J15/3244

摘要： A sealing apparatus 1 includes a sealing apparatus body 2 and a slinger 3. The sealing apparatus body 2 includes an annular reinforcing ring 10 and an annular elastic body portion 20 formed of an elastic body mounted on the reinforcing ring 10. The slinger 3 includes a flange portion 31 which is an annular portion extending toward an outer peripheral side. The elastic body portion 20 includes an end-face lip 21 which is an annular lip extending toward an inner side and contacts the flange portion 31 from an outer side. At least one groove 33 is formed on an outer side of the flange portion 31 of the slinger 3, on a surface of the end-face lip 21 on an inner peripheral side, a plurality of radial projections 23 are formed side by side in a circumferential direction, and at least one circumferential projection 24 is formed.

公开(公告)号：US20180372222A1

公开(公告)日：2018-12-27

申请号：US15775019

申请日：2016-11-22

申请人： NOK CORPORATION

发明人： Takehiro NAKAGAWA ,  Junichi NODA ,  Shigeyuki ONO

IPC分类号： F16J15/3232 ,  F16J15/3244

摘要： Static leakage is suppressed in a sealing device, where a sealing lip slidably makes contacts with a sealing flange, in which a thread groove exhibits fluid pumping action during rotation. Sealing device performs sealing between a housing and a rotating shaft inserted into a shaft hole in the housing to prevent sealed fluid on a machine inner side from leaking to an outer side. A sealing lip mounted on an inner periphery of the shaft hole slidably makes contact with the sealing flange mounted on an outer periphery of the rotating shaft. The thread groove intersects an edge of the sealing lip. An inner peripheral tube portion is provided on an attachment ring that holds the sealing lip. An inner peripheral lip that slidably makes contact with the inner peripheral tube portion is provided on the sealing flange side on the inner peripheral side of the thread groove.

公开(公告)号：US20150115543A1

公开(公告)日：2015-04-30

申请号：US14502308

申请日：2014-09-30

申请人： NOK CORPORATION

发明人： Takehiro NAKAGAWA

IPC分类号： F16J15/32

CPC分类号： F16J15/3244 ,  F16J15/3204

摘要： An oil seal includes a bidirectional thread formed by the combination of a normal thread and a reverse thread and including ship-bottom-shaped threads as the threads, in which sealing performance by the thread can be improved. A normal thread and a reverse thread that exhibit a pumping action on a sealing fluid are provided side by side on the circumference on an atmospheric-side surface of a seal lip sliding portion. The normal thread and an reverse thread are respectively threads in which a parallel thread that begins from a lip tip and a ship-bottom-shaped thread continuous with the parallel thread are integrally continuous.

摘要翻译： 油封包括由正常螺纹和反向螺纹组合形成的双向螺纹，并且包括作为螺纹的船底形螺纹，其中可以提高螺纹的密封性能。 在密封唇滑动部分的大气侧表面上的圆周上并排设置在密封流体上呈现泵送作用的正常螺纹和反向螺纹。 普通螺纹和反向螺纹分别是螺纹，其中从唇尖开始的平行螺纹和与平行螺纹连续的船底形螺纹是一体连续的。