JPH08170624A - Snap ring - Google Patents
Snap ringInfo
- Publication number
- JPH08170624A JPH08170624A JP33367594A JP33367594A JPH08170624A JP H08170624 A JPH08170624 A JP H08170624A JP 33367594 A JP33367594 A JP 33367594A JP 33367594 A JP33367594 A JP 33367594A JP H08170624 A JPH08170624 A JP H08170624A
- Authority
- JP
- Japan
- Prior art keywords
- snap ring
- groove
- inner peripheral
- circumferential
- diameter
- 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.)
- Pending
Links
Landscapes
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、孔等の内周面に形成し
た環状の内周溝に嵌着され、前記孔等の内周の部材を抜
け止めしたり、スラスト荷重を受けるために用いられる
スナップリングに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is adapted to be fitted in an annular inner peripheral groove formed on the inner peripheral surface of a hole or the like to prevent the inner peripheral member of the hole or the like from coming off or to receive a thrust load. Regarding the snap ring used.
【０００２】[0002]
【従来の技術】スナップリングは、それ自体が保有して
いる弾性を利用して、軸の外周面もしくは孔等の内周面
に形成した環状の溝に嵌着され、軸外周もしくは孔部内
周の部材の抜け止め手段等として使用される。図４は、
メカニカルシールに用いられているスナップリングの装
着状態を示すもので、すなわち参照符号１０１は図示さ
れていない機器のハウジング内周面に固定的に装着され
るケース、１０２はこのケース１０１にＯリング１０３
を介して気密的かつ軸方向移動自在に配置された環状の
リテーナ、１０４はこのリテーナ１０２に一体的に嵌着
されたシールリング、１０５はケース１０１内に配置さ
れてシールリング１０４をリテーナ１０２を介して付勢
し図示されていない回転側のメイティングリングに押し
付けるコイルスプリングで、スナップリング１００は、
ケース１０１の外径筒状部１０１ａの先端部内周面に形
成された環状の内周溝１０１ｂに嵌着されている。この
スナップリング１００は、内径がリテーナ１０２の外径
よりも小径であって、コイルスプリング１０５により付
勢されたリテーナ１０２がケース１０１から脱落するの
を阻止するものである。2. Description of the Related Art A snap ring is fitted in an annular groove formed on an outer peripheral surface of a shaft or an inner peripheral surface such as a hole by utilizing elasticity possessed by the snap ring, and the outer peripheral surface of the shaft or the inner peripheral surface of a hole portion is fitted. It is used as a means for preventing the members from coming off. FIG.
1 shows a mounting state of a snap ring used for a mechanical seal, that is, reference numeral 101 is a case fixedly mounted on an inner peripheral surface of a housing of a device (not shown), and 102 is an O ring 103 in the case 101.
An annular retainer that is arranged so as to be airtight and movable in the axial direction via 104, a seal ring 104 that is integrally fitted to the retainer 102, and a 105 that is arranged inside the case 101 to attach the seal ring 104 to the retainer 102. The snap ring 100 is a coil spring that is urged through and is pressed against a rotating side mating ring (not shown).
The case 101 is fitted into an annular inner peripheral groove 101b formed on the inner peripheral surface of the distal end portion of the outer cylindrical portion 101a. The snap ring 100 has an inner diameter smaller than the outer diameter of the retainer 102, and prevents the retainer 102 urged by the coil spring 105 from falling off the case 101.
【０００３】スナップリング１００は、図５に示すよう
に、環状体の円周方向一部を切除した略Ｃ字形の金具で
あって、内周溝１０１ｂへの未装着状態においては、外
径がこの内周溝１０１ｂよりも僅かに大径であり、この
ため、適宜縮径された状態で前記内周溝１０１ｂに嵌め
込まれ、その時の外径方向への張力によって溝底に圧接
する。内周溝１０１ｂへの装着状態においては、図６に
示すように、円周方向両端１００ａ，１００ｂの間δが
離間している。As shown in FIG. 5, the snap ring 100 is a substantially C-shaped metal member obtained by cutting out a part of the annular body in the circumferential direction, and has an outer diameter when it is not attached to the inner peripheral groove 101b. The diameter is slightly larger than that of the inner peripheral groove 101b. Therefore, the inner peripheral groove 101b is fitted into the inner peripheral groove 101b in a properly reduced diameter, and is pressed against the groove bottom by the tension in the outer diameter direction at that time. In the state of being mounted in the inner circumferential groove 101b, as shown in FIG. 6, δ is separated between the circumferential ends 100a and 100b.
【０００４】[0004]
【発明が解決しようとする課題】このようなスナップリ
ング１００は、市販されている既製の製品が使用できな
い場合は、用途に応じて製作されるが、径方向の装着ス
ペース等の条件によっては、軸方向厚さや径方向幅ある
いは材質が制約され、このため、縮径状態で内周溝１０
１ｂに嵌め込んだ時に十分なバネ荷重（張力）が得られ
ず、コイルスプリング１０５の付勢力等による僅かな外
力でも、内周溝１０１ｂから簡単に外れてしまう恐れが
ある。Such a snap ring 100 is manufactured according to the intended use when a commercially available off-the-shelf product cannot be used. However, depending on the conditions such as the radial mounting space, The axial thickness, the radial width, or the material is restricted, so that the inner circumferential groove 10 is reduced in the reduced diameter state.
When fitted into 1b, a sufficient spring load (tension) cannot be obtained, and even a small external force due to the biasing force of the coil spring 105 may easily come off the inner circumferential groove 101b.
【０００５】本発明は、このような問題に鑑みてなされ
たもので、その主な目的とするところは、縮径装着状態
での張力が小さくても、容易に内周溝から外れることの
ないスナップリングを提供することにある。The present invention has been made in view of the above problems, and its main purpose is not to easily disengage from the inner circumferential groove even if the tension in the reduced diameter mounted state is small. To provide a snap ring.
【０００６】[0006]
【課題を解決するための手段】上記技術的課題を有効に
解決するための手段として、本発明は、原形では円周方
向両端が互いに離間した略Ｃ字形を呈し、筒状内面に形
成された環状の内周溝に前記原形より適宜縮径された状
態で嵌着されるスナップリングであって、円周方向一端
から他端までの外周長さを前記筒状内面の円周長さより
長く、かつ前記内周溝の溝底の円周長さ以下としたもの
である。As means for effectively solving the above-mentioned technical problems, the present invention has a substantially C-shape in which both ends in the circumferential direction are separated from each other in an original form, and is formed on a cylindrical inner surface. A snap ring that is fitted to the annular inner circumferential groove in a state of being appropriately reduced in diameter from the original shape, the outer circumferential length from one end to the other end in the circumferential direction being longer than the circumferential length of the tubular inner surface, Further, the circumferential length of the groove bottom of the inner circumferential groove is not more than the length.
【０００７】[0007]
【作用】内周溝にいったん装着されたスナップリングが
この内周溝から外れるには、外径が内周溝の内径縁より
も小径となるように縮径変形されなければならないが、
スナップリングの外周長さが、孔部などの筒状内面の円
周長さより長く、かつ前記内周溝の溝底の円周長さ以下
であれば、このような縮径変形はスナップリングの円周
方向両端が互いに衝合することによって阻止されるた
め、容易に外れることがない。特に、スナップリングの
外周長さを、前記内周溝の溝底の円周長さと同等とする
ことによって、装着状態での前記円周方向両端間の隙間
をほぼ零とすることが望ましい。[Operation] In order for the snap ring once mounted in the inner peripheral groove to come off from the inner peripheral groove, the outer diameter must be reduced and deformed so that the outer diameter becomes smaller than the inner diameter edge of the inner peripheral groove.
If the outer circumferential length of the snap ring is longer than the circumferential length of the cylindrical inner surface such as the hole portion and is equal to or less than the circumferential length of the groove bottom of the inner circumferential groove, such a reduced diameter deformation is caused by the snap ring. Since both ends in the circumferential direction are blocked by abutting each other, they do not come off easily. In particular, it is desirable that the outer circumferential length of the snap ring is made equal to the circumferential length of the groove bottom of the inner circumferential groove, so that the gap between the circumferential ends in the mounted state is substantially zero.
【０００８】[0008]
【実施例】図１は、本発明に係るスナップリングの好ま
しい一実施例の未装着状態を示すもので、このスナップ
リング１０は、原形においては内径φ1 が２６７ｍｍ、
外径φ2 が２７３ｍｍ（径方向幅ｗが３ｍｍ）、軸方向
厚さｔが１．５ｍｍの金属製環状体の円周方向一部を所
要の長さだけ切断した形状、すなわち円周方向両端１
１，１２の間δ1 が互いに例えば１７ｍｍ離間された略
Ｃ字形を呈する。前記円周方向両端１１，１２の近傍に
はそれぞれ装着用の治具（図示省略）を係合するための
小孔１１ａ，１２ａが開設されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a preferred embodiment of a snap ring according to the present invention in an unmounted state. The snap ring 10 has an inner diameter φ 1 of 267 mm in its original form.
The outer diameter φ 2 is 273 mm (the radial width w is 3 mm) and the axial thickness t is 1.5 mm, and a shape obtained by cutting a part in the circumferential direction by a required length, that is, both ends in the circumferential direction. 1
Δ 1 between 1 and 12 has a substantially C-shape separated from each other by, for example, 17 mm. Small holes 11a, 12a for engaging a mounting jig (not shown) are provided near the both ends 11, 12 in the circumferential direction.
【０００９】一方、図２は、内周に上記スナップリング
１０が装着される筒状体２０を示すもので、例えば先に
述べた図４のメカニカルシールにおけるケース１０１の
外径筒状部１０１ａの一部である。この筒状体２０の内
周面（筒状内面）２２には、円周方向に連続した無端の
内周溝２１が形成されている。筒状体２０は、その内径
φ3 が２６６ｍｍであり、内周溝２１は、その溝底の直
径φ4 が２６８ｍｍとなっている。すなわち、スナップ
リング１０の一端１１から他端１２までの外周長さ（φ
2 ×π−δ1 ≒８４０ｍｍ）は、内周溝２１の内径縁
（筒状体２０の内周面２２）の円周長さ（φ3 ×π≒８
３５ｍｍ）よりも長く、内周溝２１の溝底の円周長さ
（φ4 ×π≒８４２ｍｍ）より僅かに短いものとなって
いる。On the other hand, FIG. 2 shows a cylindrical body 20 to which the snap ring 10 is mounted on the inner periphery thereof, for example, the outer diameter cylindrical portion 101a of the case 101 in the mechanical seal shown in FIG. It is a part. An endless inner circumferential groove 21 continuous in the circumferential direction is formed on the inner circumferential surface (cylindrical inner surface) 22 of the tubular body 20. The cylindrical body 20 has an inner diameter φ 3 of 266 mm, and the inner circumferential groove 21 has a groove bottom diameter φ 4 of 268 mm. That is, the outer peripheral length from one end 11 to the other end 12 of the snap ring 10 (φ
2 × π−δ 1 ≈840 mm is the circumferential length (φ 3 × π≈8) of the inner diameter edge of the inner circumferential groove 21 (the inner circumferential surface 22 of the tubular body 20).
35 mm) and is slightly shorter than the circumferential length (φ 4 × π≈842 mm) of the groove bottom of the inner circumferential groove 21.
【００１０】したがって、スナップリング１０は、外径
φ2 が２７３ｍｍから内周溝２１の溝底の直径φ4 と同
じ２６８ｍｍまで縮径されると共に、内径部が筒状体２
０の内周面２２から２ｍｍ程度内周側へ突出した状態で
筒状体２０の内周溝２１に装着され、その結果、図３に
示すように、円周方向両端１１，１２が僅かな隙間Ｇを
介して互いに近接対向状態となる。ここで、内周溝２１
にいったん装着されたスナップリング１０が、スラスト
方向の荷重を受けたりすることによって内周溝２１から
外れる際には、内周溝２１の内径縁よりも小径となるよ
うに縮径変形されなければならないが、このような縮径
変形は、前記両端１１，１２の衝合によって有効に阻止
される。すなわち、スナップリング１０の外周長さが内
周溝２１の内径縁の円周長さよりも長いことから、前記
両端１１，１２が互いに衝合するまで縮径させた状態で
のスナップリング１０の外径は、内周溝２１の内径縁す
なわち筒状体２０の内径φ3 よりも大径であり、このた
め、縮径変形に対する反発力による内周溝２１への嵌合
力（張力）が比較的弱くても、外力によって内周溝２１
から容易に外れることがない。Therefore, the snap ring 10 has an outer diameter φ 2 reduced from 273 mm to 268 mm which is the same as the diameter φ 4 of the groove bottom of the inner circumferential groove 21, and the inner diameter portion of the snap ring 10 is cylindrical.
It is mounted in the inner circumferential groove 21 of the tubular body 20 in a state of projecting from the inner circumferential surface 22 of 0 to the inner circumferential side by about 2 mm, and as a result, as shown in FIG. The two are in close proximity to each other through the gap G. Here, the inner circumferential groove 21
When the snap ring 10 once attached to the inner peripheral groove 21 is disengaged from the inner peripheral groove 21 by receiving a load in the thrust direction, the snap ring 10 must be reduced in diameter so as to have a smaller diameter than the inner peripheral edge of the inner peripheral groove 21. However, such a diameter reduction deformation is effectively prevented by the abutment of the both ends 11, 12. That is, since the outer circumferential length of the snap ring 10 is longer than the circumferential length of the inner diameter edge of the inner circumferential groove 21, the outside of the snap ring 10 in a state in which the both ends 11, 12 are reduced in diameter until they abut each other. The diameter is larger than the inner diameter edge of the inner circumferential groove 21, that is, the inner diameter φ 3 of the tubular body 20, and therefore, the fitting force (tension) to the inner circumferential groove 21 due to the repulsive force against the contraction deformation is relatively large. Even if it is weak, the internal groove 21 due to external force
It does not come off easily.
【００１１】好ましくは、スナップリング１０の外周長
さは、内周溝２１の溝底の円周長さと同等とし、すなわ
ち装着状態においてスナップリング１０の両端１１，１
２間の隙間がＧ≒０となるようにすることが望ましい。
この場合、内周溝２１の加工誤差等に対応するために、
スナップリング１０の製作段階では、その外周長さは予
め長めにしておき、装着の際に現物合わせをしながら、
前記両端１１，１２のヤスリがけ等によって、Ｇ≒０と
なるように寸法修正しても良い。Preferably, the outer peripheral length of the snap ring 10 is equal to the circumferential length of the groove bottom of the inner peripheral groove 21, that is, both ends 11, 1 of the snap ring 10 in the mounted state.
It is desirable that the gap between the two be G≈0.
In this case, in order to deal with the processing error of the inner circumferential groove 21 and the like,
At the production stage of the snap ring 10, the outer peripheral length is made longer beforehand, and while fitting the actual thing at the time of mounting,
The dimensions may be corrected so that G≈0 by sanding the both ends 11 and 12.
【００１２】なお、内周溝２１への上記スナップリング
１０の装着は、例えばスナップリング１０の一端１１の
外周部を先行して内周溝２１の一部に嵌め込み、その
後、順次溝内に這わせるようにして嵌め込むことにより
可能である。The snap ring 10 can be attached to the inner circumferential groove 21 by, for example, first fitting the outer circumferential portion of the one end 11 of the snap ring 10 into a part of the inner circumferential groove 21, and then sequentially crawling into the groove. It is possible by fitting it so that it is possible.
【００１３】[0013]
【発明の効果】本発明のスナップリングによれば、その
弾性による内周溝の溝底への張力が弱くても、いったん
装着された後は、外力によって内周溝から容易に外れる
ことがなく、したがってスラスト受け手段あるいは係止
手段として優れた機能を奏することができる。According to the snap ring of the present invention, even if the tension on the groove bottom of the inner circumferential groove due to its elasticity is weak, it will not easily come off from the inner circumferential groove by the external force once it is mounted. Therefore, an excellent function as the thrust receiving means or the locking means can be achieved.
【図１】本発明に係るスナップリングの好ましい一実施
例を未装着状態で示す説明図である。FIG. 1 is an explanatory view showing a preferred embodiment of a snap ring according to the present invention in an unmounted state.
【図２】上記実施例のスナップリングが装着される内周
溝が形成された筒状体を示す説明図である。FIG. 2 is an explanatory view showing a tubular body in which an inner circumferential groove is formed in which the snap ring of the above embodiment is mounted.
【図３】上記実施例のスナップリングの装着状態を示す
説明図である。FIG. 3 is an explanatory view showing a mounted state of the snap ring of the above embodiment.
【図４】スナップリングの使用例としてメカニカルシー
ルの一部を示す説明図である。FIG. 4 is an explanatory view showing a part of a mechanical seal as a usage example of a snap ring.
【図５】従来のスナップリングの一例を未装着状態で示
す説明図である。FIG. 5 is an explanatory diagram showing an example of a conventional snap ring in an unmounted state.
【図６】上記従来のスナップリングの装着状態を示す説
明図である。FIG. 6 is an explanatory view showing a mounted state of the conventional snap ring.
１０ スナップリング １１，１２ 円周方向両端 ２０ 筒状体 ２１ 内周溝 ２２ 内周面（筒状内面） 10 Snap Rings 11 and 12 Circumferential Ends 20 Cylindrical Body 21 Inner Circumferential Groove 22 Inner Circumferential Surface (Cylindrical Inner Surface)
Claims (1)
略Ｃ字形を呈し、筒状内面に形成された環状の内周溝に
前記原形より適宜縮径された状態で嵌着されるスナップ
リングであって、円周方向一端から他端までの外周長さ
を前記筒状内面の円周長さより長く、かつ前記内周溝の
溝底の円周長さ以下としたことを特徴とするスナップリ
ング。1. A snap ring, which has a substantially C shape in which both ends in the circumferential direction are separated from each other in the original shape, and is fitted in an annular inner peripheral groove formed on a cylindrical inner surface in a state of being appropriately reduced in diameter from the original shape. A snap characterized in that the outer peripheral length from one end to the other end in the circumferential direction is longer than the circumferential length of the cylindrical inner surface and not more than the circumferential length of the groove bottom of the inner circumferential groove. ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33367594A JPH08170624A (en) | 1994-12-16 | 1994-12-16 | Snap ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33367594A JPH08170624A (en) | 1994-12-16 | 1994-12-16 | Snap ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08170624A true JPH08170624A (en) | 1996-07-02 |
Family
ID=18268718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33367594A Pending JPH08170624A (en) | 1994-12-16 | 1994-12-16 | Snap ring |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08170624A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002349596A (en) * | 2001-05-22 | 2002-12-04 | Denso Corp | Torque transmission |
| US20130213029A1 (en) * | 2012-02-22 | 2013-08-22 | MAGNETI MARELLI S.p.A. | Hydraulic servo-control of a servo-controlled gearbox |
| JP2019190441A (en) * | 2018-04-27 | 2019-10-31 | アイシン精機株式会社 | Valve-opening/closing timing control device |
| JP2019218990A (en) * | 2018-06-19 | 2019-12-26 | 横浜ゴム株式会社 | Retaining Ring |
-
1994
- 1994-12-16 JP JP33367594A patent/JPH08170624A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002349596A (en) * | 2001-05-22 | 2002-12-04 | Denso Corp | Torque transmission |
| US20130213029A1 (en) * | 2012-02-22 | 2013-08-22 | MAGNETI MARELLI S.p.A. | Hydraulic servo-control of a servo-controlled gearbox |
| EP2631493A1 (en) | 2012-02-22 | 2013-08-28 | Magneti Marelli S.p.A. | Hydraulic servo-control of a servo-controlled gearbox |
| CN103335099A (en) * | 2012-02-22 | 2013-10-02 | 马涅蒂-马瑞利公司 | Hydraulic servo-control of a servo-controlled gearbox |
| US9574576B2 (en) | 2012-02-22 | 2017-02-21 | MAGNETI MARELLI S.p.A. | Hydraulic servo-control of a servo-controlled gearbox |
| CN103335099B (en) * | 2012-02-22 | 2017-04-12 | 马涅蒂-马瑞利公司 | Hydraulic servo-control of a servo-controlled gearbox |
| JP2019190441A (en) * | 2018-04-27 | 2019-10-31 | アイシン精機株式会社 | Valve-opening/closing timing control device |
| JP2019218990A (en) * | 2018-06-19 | 2019-12-26 | 横浜ゴム株式会社 | Retaining Ring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20020320 |