JPS6237022Y2 - - Google Patents
Info
- Publication number
- JPS6237022Y2 JPS6237022Y2 JP1980015965U JP1596580U JPS6237022Y2 JP S6237022 Y2 JPS6237022 Y2 JP S6237022Y2 JP 1980015965 U JP1980015965 U JP 1980015965U JP 1596580 U JP1596580 U JP 1596580U JP S6237022 Y2 JPS6237022 Y2 JP S6237022Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil seal
- tension force
- force
- circumferential
- present
- 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.)
- Expired
Links
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Description
【考案の詳細な説明】
本考案はオイルシールに関し、さらに詳しくは
摩擦損失の小さいオイルシールを提供することを
目的とする。従来、オイルシール１は第１図に示
すようにリツプ部２の摺回動面３の背方外周に周
溝７が形成され、該周溝７に緊締リング４を環合
して緊迫力を得ている。しかし第２図に示すグラ
フのように摺回動面３と軸ａとの摩擦力（Ｆ）と
緊迫力（Pr）との関係は実験的に第２図に表示
されるごとくなり、
Ｆ∝Pr
なる関係式をもつて表わされ、摩擦力を低下せし
めるには緊迫力を小さくすることが好ましいこと
がわかる。しかるに緊迫力はシールリツプの軸に
対する締め代による弾性力と緊締リングによつて
生じ、緊締リングの分担比を小さくするとリツプ
部の摩耗およびクリープ等により密封性が不安定
となるため上記緊迫力を小さくするにはシールリ
ツプの緊迫力を低減せしめなければならないもの
で、本考案は密封性を確保するために十分な締め
代を持つたままオイルシールのシールリツプの緊
迫力を低減するものである。[Detailed Description of the Invention] The present invention relates to an oil seal, and more specifically, an object of the present invention is to provide an oil seal with low friction loss. Conventionally, as shown in FIG. 1, an oil seal 1 has a circumferential groove 7 formed on the rear outer periphery of a sliding surface 3 of a lip portion 2, and a tightening ring 4 is fitted into the circumferential groove 7 to apply tension. It has gained. However, as shown in the graph shown in Fig. 2, the relationship between the frictional force (F) and tension force (Pr) between the sliding rotating surface 3 and the axis a is experimentally shown in Fig. 2, and F∝ It is expressed by the relational expression Pr, and it can be seen that it is preferable to reduce the tension force in order to reduce the frictional force. However, the tension force is generated by the elastic force due to the tightness of the seal lip against the axis and the tension ring, and if the sharing ratio of the tightening ring is reduced, the sealing performance will become unstable due to wear and creep of the lip part, so it is necessary to reduce the above tension force. In order to achieve this, the tension force on the seal lip must be reduced, and the present invention reduces the tension force on the seal lip of the oil seal while maintaining sufficient tightness to ensure sealing performance.
すなわち第３図に示す第１の実施例にしたがつ
て本考案を説明すると、オイルシール１のリツプ
部２の緊迫力はリツプ部２の弾性力によるものが
30％〜50％を占めており、該リツプ部２の周縁５
の円周部分に径方向に伸びるスリツト６，６…を
適宜の間隔に配設することにより、このリツプ部
２の弾性力に起因する緊迫力を減少させて適当な
値の緊迫力が得られ、低摩擦力のオイルシールを
構成することができる。 That is, to explain the present invention according to the first embodiment shown in FIG. 3, the tension force on the lip portion 2 of the oil seal 1 is due to the elastic force of the lip portion 2.
It occupies 30% to 50%, and the peripheral edge 5 of the lip portion 2
By arranging slits 6, 6, etc. extending in the radial direction at appropriate intervals on the circumferential portion of the lip portion 2, the tension force caused by the elastic force of the lip portion 2 can be reduced and a tension force of an appropriate value can be obtained. , it is possible to construct an oil seal with low frictional force.
また第４図は本考案の他の実施例を示すもの
で、この実施例は周溝７の緊締リング押え側の周
縁５ａを該緊締リングを抱え込むように延ばした
ものであるが、周縁５ａに対し円周部分に径方向
に伸びる多数のスリツト６，６…を円周方向等間
隔に形成することと相俟つて該オイルシールが軟
質ゴムの弾性体であることから該部の成型が可能
になるもので、延長された周縁５ａにより緊締リ
ングを周溝７に確実に保持することができるよう
になるものである。 FIG. 4 shows another embodiment of the present invention, in which the circumferential edge 5a of the circumferential groove 7 on the tightening ring holding side is extended so as to hold the tightening ring. On the other hand, since a large number of slits 6, 6, etc. extending in the radial direction are formed in the circumferential portion at equal intervals in the circumferential direction, and the oil seal is made of a soft rubber elastic body, it is possible to mold this portion. This makes it possible to securely hold the tightening ring in the circumferential groove 7 by the extended peripheral edge 5a.
以上説明したように本考案によればリツプ部に
環合する緊締リング保持のための周縁に対し円周
部分に径方向に伸びるスリツト６を配設したため
該周縁の緊迫力が除却され、シールリツプの緊迫
力を低減せしめるものであるから低摩擦力により
摺回動部の摩擦損失が小さく長期寿命を有するオ
イルシールを得ることができるものであり、本考
案の実用的効果は極めて大きい。 As explained above, according to the present invention, since the slit 6 extending in the radial direction is provided on the circumferential portion of the circumferential edge for holding the tightening ring that fits around the lip portion, the tightening force on the circumferential edge is eliminated, and the tightening force on the circumferential edge is removed. Since the tension force is reduced, it is possible to obtain an oil seal with low frictional force, low friction loss in the sliding and rotating parts, and a long service life, and the practical effects of the present invention are extremely large.
図面は本考案オイルシールの実施例を示すもの
で、第１図は従来のオイルシールの要部切欠斜視
図、第２図は摩擦力と緊迫力の関係を示すグラ
フ、第３図は第１の実施例を示す本考案オイルシ
ールの要部切欠斜視図、第４図は第２の実施例を
示す同斜視図である。
１……オイルシール、２……リツプ部、３……
摺回動面、４……緊締リング、５，５ａ……周
縁、６……スリツト、７……周溝、ａ……軸。
The drawings show an embodiment of the oil seal of the present invention. Fig. 1 is a cutaway perspective view of the main parts of a conventional oil seal, Fig. 2 is a graph showing the relationship between frictional force and tension force, and Fig. 3 is a graph showing the relationship between frictional force and tension force. FIG. 4 is a cutaway perspective view of essential parts of the oil seal of the present invention showing an embodiment of the present invention. FIG. 4 is a perspective view of a second embodiment of the same. 1... Oil seal, 2... Lip part, 3...
Sliding and rotating surface, 4... Tightening ring, 5, 5a... Peripheral edge, 6... Slit, 7... Peripheral groove, a... Shaft.
Claims (1)
摺回動面に達しない複数個のスリツトを円周部分
に等配設し、該シールリツプの緊迫力を低減して
なることを特徴とするオイルシール。 An oil seal characterized in that a plurality of slits extending radially from the circumferential edge of the circumferential groove of the seal lip and not reaching the sliding rotation surface are arranged equally around the circumference to reduce the tension force on the seal lip. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980015965U JPS6237022Y2 (en) | 1980-02-13 | 1980-02-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980015965U JPS6237022Y2 (en) | 1980-02-13 | 1980-02-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56119059U JPS56119059U (en) | 1981-09-10 |
| JPS6237022Y2 true JPS6237022Y2 (en) | 1987-09-21 |
Family
ID=29612398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980015965U Expired JPS6237022Y2 (en) | 1980-02-13 | 1980-02-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6237022Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5964120B2 (en) * | 2012-04-13 | 2016-08-03 | Ntn株式会社 | Wheel bearing sealing device |
-
1980
- 1980-02-13 JP JP1980015965U patent/JPS6237022Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56119059U (en) | 1981-09-10 |
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