JPH1019137A - Sealing device - Google Patents

Sealing device

Info

Publication number
JPH1019137A
JPH1019137A JP8191485A JP19148596A JPH1019137A JP H1019137 A JPH1019137 A JP H1019137A JP 8191485 A JP8191485 A JP 8191485A JP 19148596 A JP19148596 A JP 19148596A JP H1019137 A JPH1019137 A JP H1019137A
Authority
JP
Japan
Prior art keywords
seal lip
movable shaft
sealing device
protective ring
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP8191485A
Other languages
Japanese (ja)
Other versions
JP3588923B2 (en
Inventor
Kenichi Yarimizu
健一 鎗水
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nok Corp
Original Assignee
Nok Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nok Corp filed Critical Nok Corp
Priority to JP19148596A priority Critical patent/JP3588923B2/en
Publication of JPH1019137A publication Critical patent/JPH1019137A/en
Application granted granted Critical
Publication of JP3588923B2 publication Critical patent/JP3588923B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Sealing With Elastic Sealing Lips (AREA)

Abstract

PROBLEM TO BE SOLVED: To bring a seal lip into contact with a movable shaft in a proper condition, and thereby obtain excellent sealing performance by providing a guide regulating the position of the seal lip for a protective ring in an oil seal member where a protective ring is engaged with the inner circumference of an engagement part the outer circumference of which is engaged with the inner circumference of a housing. SOLUTION: In the sealing device 1 equipped with an oil seal member 8 sealing a gap between a housing 20 and a movable shaft 30, the oil seal member 8 is formed out of am engagement part 3 to be engaged with the inner circumference of the housing 20, a seal lip 4 hermetically brought into contact with the outer circumference of the movable shaft 30, a spring 5 energizing the seal lip 4 to the direction of the movable shaft 30, a bamper 6 stabilizing the movement of the seal lip 4, and of a bellows 7. In this case, a protective ring 9 protecting the seal lip 4 is fixedly engaged with the inner circumference of the engagement part 3. And the protective ring 9 is provided-with a cylinder part 10 to be engaged with the inner circumference of the engagement part 3, and with a guide 11 guiding the seal lip 4 in such a way as to be properly brought into contact with the movable shaft 30.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、たとえば各種装置
の軸封部に用いられるオイルシールなどの密封装置に関
するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device such as an oil seal used for a shaft sealing portion of various devices.

【0002】[0002]

【従来の技術】従来、この種の密封装置としては、たと
えば図5乃至図7に示すものがある。図5は従来技術に
係る密封装置の概略構成断面図である。この密封装置1
00は、互いに同心的に相対可動自在に組み付けられる
ハウジング200とハウジング200内に挿入する可動
軸300間の環状の隙間をシールするものである。
2. Description of the Related Art Conventionally, as this type of sealing device, there is, for example, one shown in FIGS. FIG. 5 is a schematic configuration sectional view of a sealing device according to the related art. This sealing device 1
Reference numeral 00 seals an annular gap between the housing 200 and the movable shaft 300 inserted into the housing 200, which are concentrically and relatively movable.

【0003】ハウジング200の内周に嵌合される環状
のはめあい部101と、可動軸300の外周に摺動自在
に密封接触するシールリップ102と、シールリップ1
02を可動軸300方向に付勢するばね103と、はめ
あい部101とシールリップ102間に可動軸300の
大きな偏心に対して追随性を得るように設けられたベロ
ー部104とからオイルシール部材105が構成されて
いる。
An annular fitting portion 101 fitted on the inner periphery of the housing 200, a seal lip 102 slidably sealingly contacting the outer periphery of the movable shaft 300, and a seal lip 1
An oil seal member 105 includes a spring 103 for urging the movable shaft 02 in the direction of the movable shaft 300 and a bellows portion 104 provided between the fitting portion 101 and the seal lip 102 so as to follow large eccentricity of the movable shaft 300. Is configured.

【0004】また、密封装置100内に可動軸300を
挿入する際に、大きく偏心することによって、シールリ
ップ102が大きな荷重を受けて損傷してしまうことの
ないように、所定の範囲内に偏心を規制することで、シ
ールリップ102を保護する保護環106がはめあい部
101の内周に嵌合され固定されている。
Also, when the movable shaft 300 is inserted into the sealing device 100, the eccentricity is set within a predetermined range so that the seal lip 102 will not be damaged by a large load due to large eccentricity. , The protection ring 106 for protecting the seal lip 102 is fitted and fixed to the inner periphery of the fitting portion 101.

【0005】このように、密封装置100内はオイルシ
ール部材105に保護環106が嵌合され固定された構
成となっている。
As described above, the inside of the sealing device 100 is configured such that the protection ring 106 is fitted and fixed to the oil seal member 105.

【0006】なお、組み付けの際にはハウジング200
内に密封装置100を嵌合した後、密封装置100内に
可動軸300を挿入する。
When assembling the housing 200,
After the sealing device 100 is fitted in the inside, the movable shaft 300 is inserted into the sealing device 100.

【0007】このように構成される密封装置100を使
用する際には、可動軸300を密封装置100に挿入し
た初期の状態ではシールリップ102は可動軸300の
挿入とともに引っ張られて延びた状態となるが、その後
図5に示すような正常なシールリップ102と可動軸3
00との接触状態となることで十分な密封力が得られ
る。
When the sealing device 100 having such a configuration is used, in the initial state where the movable shaft 300 is inserted into the sealing device 100, the seal lip 102 is pulled and extended with the insertion of the movable shaft 300. However, the normal seal lip 102 and the movable shaft 3 as shown in FIG.
A sufficient sealing force can be obtained by being in contact with 00.

【0008】[0008]

【発明が解決しようとする課題】しかしながら、上記の
ような従来技術の場合には、図6に示すように保護環1
06の可動軸300が挿入される開口部107はプレス
による打ち抜きのみで単に円形の孔が設けられているだ
けであった。
However, in the case of the above-mentioned prior art, as shown in FIG.
The opening 107 into which the movable shaft 300 is inserted is merely provided with a circular hole by punching with a press.

【0009】ここで、この開口部107の円の径は、密
封装置100の使用状態において可動軸300の最大偏
心した場合に接触することがない程度に設定するため、
所定の長さ以上にしなければならない。
Here, the diameter of the circle of the opening 107 is set so as not to make contact when the movable shaft 300 is maximally eccentric when the sealing device 100 is used.
It must be longer than a specified length.

【0010】そのため、可動軸300を密封装置100
に挿入する際にシールリップ102が可動軸300の挿
入とともに引っ張られて、シールリップ102が開口部
107の開口端108の特にエッジ部により傷や切れが
生じてしまったり、また、シールリップ102が開口部
107の外に出てしまって、シールリップ102がめく
れてしまい可動軸300に適正に接触していなかった
り、その後シールリップ102が正常な位置(図5)に
戻ろうとしても保護環106に引っかかってしまい図7
に示すようにシールリップ102が可動軸300に正常
に接触されない状態で十分な密封性が得られないまま使
用されてしまっていた。
Therefore, the movable shaft 300 is connected to the sealing device 100
When the seal lip 102 is inserted into the opening 107, the seal lip 102 is pulled together with the insertion of the movable shaft 300, and the seal lip 102 is damaged or cut by the opening end 108 of the opening 107, particularly the edge. Even if the seal lip 102 has come out of the opening 107 and is turned up and does not properly contact the movable shaft 300, or if the seal lip 102 subsequently tries to return to a normal position (FIG. 5), the protective ring 106 may be used. Figure 7
As shown in (1), the seal lip 102 has not been properly contacted with the movable shaft 300 and has been used without obtaining sufficient sealing performance.

【0011】また、図7の状態で長時間使用している
と、可動軸300の偏心によりシールリップ102の根
本が開口端108と接触することによって損傷してしま
うことがあった。
Further, if the seal lip 102 is used for a long time in the state shown in FIG. 7, the eccentricity of the movable shaft 300 may damage the base of the seal lip 102 by contact with the open end 108.

【0012】本発明は上記の従来技術の課題を解決する
ためになされたもので、その目的とするところは、シー
ルリップと可動軸が常に適正な接触状態で使用可能とす
る品質性に優れた密封装置を提供することにある。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide an excellent quality in which a seal lip and a movable shaft can always be used in a proper contact state. It is to provide a sealing device.

【0013】[0013]

【課題を解決するための手段】上記目的を達成するため
に本発明にあっては、外周部がハウジング内周に嵌合さ
れるはめあい部と、内周側にリップ先端部が可動軸に密
封接触するシールリップと、該シールリップと前記はめ
あい部間に設けられる前記可動軸の偏心に対して追随さ
せるためのベロー部と、を有したオイルシール部材と、
前記はめあい部の内周に嵌合して固定される保護環と、
を備えた密封装置において、前記保護環に前記シールリ
ップの位置を規制するガイドを備えたことを特徴とす
る。
In order to achieve the above object, according to the present invention, a fitting portion whose outer peripheral portion is fitted to an inner periphery of a housing, and a lip tip portion on the inner peripheral side are sealed to a movable shaft. An oil seal member having a seal lip that comes into contact, and a bellows portion for following the eccentricity of the movable shaft provided between the seal lip and the fitting portion;
A protective ring fitted and fixed to the inner periphery of the fitting portion,
And a guide for regulating the position of the seal lip on the protective ring.

【0014】したがって、シールリップは保護環に備え
られたガイドにより位置規制されるため、シールリップ
は可動軸に常に適正な状態で接触する。
Therefore, since the position of the seal lip is regulated by the guide provided on the protective ring, the seal lip always contacts the movable shaft in an appropriate state.

【0015】ガイドは軸方向に自由端を有した略円環部
により、前記シールリップを位置規制するとよい。
The guide is preferably restricted in position by a substantially annular portion having a free end in the axial direction.

【0016】したがって、略円環部によりシールリップ
が軸心の方向に位置規制されることで、シールリップは
可動軸に常に適正な状態で接触する。
Therefore, the position of the seal lip in the axial direction is regulated by the substantially annular portion, so that the seal lip always contacts the movable shaft in an appropriate state.

【0017】[0017]

【発明の実施の形態】以下に図面を参照して、この発明
の好適な実施の形態を例示的に詳しく説明する。ただ
し、この実施の形態に記載されている構成部品の寸法、
材質、形状、その相対配置などは、特に特定的な記載が
ないかぎりは、この発明の範囲をそれらのみに限定する
趣旨のものではない。
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the dimensions of the components described in this embodiment,
The material, shape, relative arrangement, and the like are not intended to limit the scope of the present invention only to them unless otherwise specified.

【0018】図1乃至図4に本発明の実施の形態に係る
密封装置を示す。図1は本発明の実施の形態に係る密封
装置の概略構成断面図である。この密封装置1は、互い
に同心的に相対可動自在に組み付けられるハウジング2
0とハウジング20内に挿入する可動軸30間の環状の
隙間をシールするものである。
FIGS. 1 to 4 show a sealing device according to an embodiment of the present invention. FIG. 1 is a schematic configuration sectional view of a sealing device according to an embodiment of the present invention. The sealing device 1 includes a housing 2 that is mounted concentrically and relatively freely movable.
This seals an annular gap between the movable shaft 30 inserted into the housing 20 and the movable shaft 30.

【0019】オイルシール部材8は、概略、ハウジング
20の内周に嵌合される、環状の補強環2を内部に備え
たはめあい部3と、可動軸30の外周に摺動自在に密封
接触するシールリップ4と、シールリップ4を可動軸3
0方向に付勢するばね5と、シールリップ4の動きを安
定させるためのバンパー6と、はめあい部3とシールリ
ップ4間に設けられる可動軸30の大きな偏心に対して
追随させるためのベロー部7とから構成されている。
The oil seal member 8 slidably and sealingly contacts the fitting portion 3 having an annular reinforcing ring 2 therein, which is fitted on the inner periphery of the housing 20 and the outer periphery of the movable shaft 30. The seal lip 4 and the movable shaft 3
A spring 5 for urging in the zero direction, a bumper 6 for stabilizing the movement of the seal lip 4, and a bellows part for following a large eccentricity of the movable shaft 30 provided between the fitting part 3 and the seal lip 4. 7 is comprised.

【0020】また、密封装置1内に可動軸30を挿入す
る際に、大きく偏心することによって、シールリップ4
が大きな荷重を受けて損傷してしまうことのないよう
に、所定の範囲内に偏心を規制することで、シールリッ
プ4を保護する保護環9がはめあい部3の内周に嵌合さ
れ固定されている。
Further, when the movable shaft 30 is inserted into the sealing device 1, the movable shaft 30 is largely eccentric, so that the sealing lip 4
By preventing eccentricity within a predetermined range so as not to be damaged by a large load, the protection ring 9 for protecting the seal lip 4 is fitted and fixed to the inner periphery of the fitting portion 3. ing.

【0021】このように、密封装置1はオイルシール部
材8に保護環9が嵌合され固定された構成となってい
る。
As described above, the sealing device 1 has a configuration in which the protective ring 9 is fitted and fixed to the oil seal member 8.

【0022】次に保護環9について、より詳しく説明す
る。
Next, the protective ring 9 will be described in more detail.

【0023】図2は本発明の実施の形態に係る保護環9
の概略斜視図である。図に示すように、保護環9は、は
めあい部3の内周に嵌合される円筒部10と、円環部に
より可動軸30の偏心を所定の範囲に収めるとともに、
シールリップ4を軸心の方向に位置規制させてシールリ
ップ4が可動軸30に対して適正に接触するように導く
円筒状のガイド11が設けられている。
FIG. 2 shows a protective ring 9 according to an embodiment of the present invention.
It is a schematic perspective view of. As shown in the figure, the protective ring 9 is configured such that the eccentricity of the movable shaft 30 is kept within a predetermined range by a cylindrical portion 10 fitted on the inner periphery of the fitting portion 3 and an annular portion.
A cylindrical guide 11 is provided to regulate the position of the seal lip 4 in the axial direction and guide the seal lip 4 to properly contact the movable shaft 30.

【0024】そして、組み付けの際にはハウジング20
内に密封装置1を嵌合した後、密封装置1内、すなわ
ち、保護環9の開口部12に可動軸30を挿入する。こ
の時、ガイド11によって可動軸30の偏心は所定の量
に収まり、また、シールリップ4は可動軸30の挿入と
ともに図3に示すように引っ張られていくが、その際シ
ールリップ4が開口部12であるガイド11に接触して
もエッジ等は形成されていないためシールリップ4等が
傷つくこともなく、また、シールリップ4はガイド11
によって軸心に向けて位置規制されるため、シールリッ
プ4とガイド11は適正な接触状態を保ち、組み付け後
はシールリップ4が徐々に元の状態に戻り、図1に示す
ような正常なシールリップ4と可動軸30との接触状態
となることで十分な密封力が得られる。
When assembling, the housing 20
After the sealing device 1 is fitted into the inside, the movable shaft 30 is inserted into the sealing device 1, that is, into the opening 12 of the protective ring 9. At this time, the eccentricity of the movable shaft 30 is reduced to a predetermined amount by the guide 11, and the seal lip 4 is pulled as shown in FIG. 3 when the movable shaft 30 is inserted. No edge or the like is formed even when it comes into contact with the guide 11 as the seal lip 12 so that the seal lip 4 and the like are not damaged.
As a result, the seal lip 4 and the guide 11 maintain an appropriate contact state, and after assembly, the seal lip 4 gradually returns to the original state, and a normal seal as shown in FIG. A sufficient sealing force can be obtained by bringing the lip 4 into contact with the movable shaft 30.

【0025】なお、保護環9のガイド11の形状は図4
に示すように先端に向かって徐々に径が小さく先細形状
13でも上記と同様の効果が得られる。
The shape of the guide 11 of the protection ring 9 is shown in FIG.
As shown in the figure, the same effect as described above can be obtained even with the tapered shape 13 whose diameter gradually decreases toward the tip.

【0026】[0026]

【発明の効果】本発明は、シールリップが保護環に備え
られたガイドにより位置規制されるため、シールリップ
は可動軸に常に適正な状態で接触するため、常に密封性
を保ち、品質に優れている。
According to the present invention, since the position of the seal lip is regulated by the guide provided on the protective ring, the seal lip always comes into contact with the movable shaft in an appropriate state. ing.

【0027】また、ガイドは軸方向に自由端を有した略
円環部により、シールリップを位置規制することによ
り、シールリップが軸心の方向に位置規制されること
で、シールリップは軸に正常な状態で接触することがで
きる。
Further, the guide restricts the position of the seal lip by a substantially annular portion having a free end in the axial direction, thereby restricting the position of the seal lip in the direction of the axis. You can make contact under normal conditions.

【図面の簡単な説明】[Brief description of the drawings]

【図1】図1は本発明の実施の形態に係る密封装置の概
略構成断面図である。
FIG. 1 is a schematic configuration sectional view of a sealing device according to an embodiment of the present invention.

【図2】図2は本発明の実施の形態に係る密封装置の主
要構成部の斜視図である。
FIG. 2 is a perspective view of main components of the sealing device according to the embodiment of the present invention.

【図3】図3は本発明の実施の形態に係る密封装置の組
み付けの状態を説明する概略構成断面図である。
FIG. 3 is a schematic cross-sectional view illustrating a state of assembly of the sealing device according to the embodiment of the present invention.

【図4】図4は本発明の実施の形態に係る密封装置の主
要構成部の斜視図である。
FIG. 4 is a perspective view of main components of the sealing device according to the embodiment of the present invention.

【図5】図5は従来技術に係る密封装置の概略構成断面
図である。
FIG. 5 is a schematic cross-sectional view of a configuration of a sealing device according to a conventional technique.

【図6】図6は従来技術に係る密封装置の主要構成部の
斜視図である。
FIG. 6 is a perspective view of main components of a sealing device according to the related art.

【図7】図7は従来技術に係る密封装置の組み付けの状
態を説明する概略構成断面図である。
FIG. 7 is a schematic cross-sectional view illustrating a state of assembly of a sealing device according to a conventional technique.

【符号の説明】[Explanation of symbols]

1 密封装置 3 はめあい部 4 シールリップ 7 ベロー部 8 オイルシール部材 9 保護環 10 円筒部 11 ガイド DESCRIPTION OF SYMBOLS 1 Sealing device 3 Fitting part 4 Seal lip 7 Bellows part 8 Oil seal member 9 Protection ring 10 Cylindrical part 11 Guide

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】外周部がハウジング内周に嵌合されるはめ
あい部と、内周側にリップ先端部が可動軸に密封接触す
るシールリップと、該シールリップと前記はめあい部間
に設けられる前記可動軸の偏心に対して追随させるため
のベロー部と、を有したオイルシール部材と、 前記はめあい部の内周に嵌合して固定される保護環と、 を備えた密封装置において、 前記保護環に前記シールリップの位置を規制するガイド
を備えたことを特徴とする密封装置。
1. A fitting portion whose outer peripheral portion is fitted to the inner periphery of a housing, a seal lip on the inner peripheral side of which a lip tip portion sealingly contacts a movable shaft, and said seal lip is provided between the seal lip and the fitting portion. An oil seal member having a bellows portion for following the eccentricity of the movable shaft; and a protective ring fitted and fixed to the inner periphery of the fitting portion. A sealing device, wherein a ring is provided with a guide for regulating the position of the seal lip.
【請求項2】前記ガイドは軸方向に自由端を有した略円
環部により、前記シールリップを位置規制することを特
徴とする請求項1に記載の密封装置。
2. The sealing device according to claim 1, wherein the guide restricts the position of the seal lip by a substantially annular portion having a free end in the axial direction.
JP19148596A 1996-07-02 1996-07-02 Sealing device Expired - Fee Related JP3588923B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19148596A JP3588923B2 (en) 1996-07-02 1996-07-02 Sealing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19148596A JP3588923B2 (en) 1996-07-02 1996-07-02 Sealing device

Publications (2)

Publication Number Publication Date
JPH1019137A true JPH1019137A (en) 1998-01-23
JP3588923B2 JP3588923B2 (en) 2004-11-17

Family

ID=16275436

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19148596A Expired - Fee Related JP3588923B2 (en) 1996-07-02 1996-07-02 Sealing device

Country Status (1)

Country Link
JP (1) JP3588923B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101950444B1 (en) * 2018-10-11 2019-02-20 평화오일씰공업 주식회사 Oil seal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101950444B1 (en) * 2018-10-11 2019-02-20 평화오일씰공업 주식회사 Oil seal

Also Published As

Publication number Publication date
JP3588923B2 (en) 2004-11-17

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