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1. 发明公开

EP2484942A4 SEAL DEVICE 有权
公开(公告)号：EP2484942A4
公开(公告)日：2016-02-24
申请号：EP10820424
申请日：2010-09-22
申请人： NOK CORP
发明人： MAEDA TOSHIYUKI , ABE YOSHIYUKI
IPC分类号： F16J15/00 , B29C33/00 , B29C45/00 , B29C45/16 , F16J9/28 , F16J15/10 , F16J15/16 , F16J15/3208 , F16J15/3272
CPC分类号： F16J15/16 , B29C45/0055 , B29C2045/0034 , B29C2793/00 , B29C2793/009 , F16J9/28 , F16J15/3208 , F16J15/3272
摘要： [Object] To provide a sealing device which is free of such a situation that a damaged portion of a back ring caused by a parting line at a surface of a slide ring is communicated with a damaged portion of the back ring caused by a through-cut of the slide ring to thereby form a leakage channel. [Solving means] A sealing device (1) having: a slide ring (2) made of a resin; and a back ring (3) made of an elastic body; the sealing device (1) being configured to seal an annular gap between a housing having a shaft hole, and a shaft inserted through the shaft hole; wherein the slide ring (2) has: a through-cut (22), comprising a circumferential cut (22A), and axial cuts (22B) extending from both ends of the circumferential cut, along the axial direction; and multiple parting lines (23A, 23B) formed on a surface of the slide ring (2), where the parting lines (23A, 23B) have been formed by injection molding the slide ring by a mold dividable into multiple partial molds at multiple junction of molds on the mold, and by subsequently parting the mold at the junction of molds; and wherein the parting lines (23A, 23B) are arranged so that the parting lines (23A, 23B) are not overlapped with the circumferential cut (22A) exposed at the junction surface of the slide ring (2) with the back ring (3), throughout the lengthwise direction of the circumferential cut.

2. 发明公开

EP3232097A4 SEALING DEVICE 有权
公开(公告)号：EP3232097A4
公开(公告)日：2017-12-20
申请号：EP15867643
申请日：2015-09-17
申请人： NOK CORP
发明人： MAEDA TOSHIYUKI
IPC分类号： F16J15/18 , F16J9/14 , F16J9/28 , F16J15/3208 , F16J15/46
CPC分类号： F16J15/18 , F16J9/14 , F16J9/28 , F16J15/3208 , F16J15/3272 , F16J15/46
摘要： The purpose of the present invention is to provide a sealing device that: has a small number of parts, specifically, the number of parts being three or less, thereby making it possible to achieve a more compact sealing device; is resistant to protrusion; and is capable of keeping sliding resistance low. To achieve said purpose, the sealing device is obtained by combining an inner seal ring, an outer seal ring held in an outer circumferential holding groove of the inner seal ring, and a back ring. The inner seal ring is obtained from a more rigid material than the outer seal ring and is provided with a cut section at one site on the circumference. The outer seal ring is obtained from a material that has lower friction and lower rigidity than the inner seal ring and is formed to be endless. The outer seal ring satisfies a dimensional size relationship of T > A when T is the radial thickness dimension of the outer seal ring, G is the protrusion gap dimension, R is the radial width dimension of the chamfered sections on the edges of the open side of the seal installation groove, and A is the sum of the protrusion gap dimension G and the radial width dimension R of the chamfered sections on the edges of the open side.

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