CN202381699U - Combined oil seal - Google Patents
Combined oil seal Download PDFInfo
- Publication number
- CN202381699U CN202381699U CN2011204893214U CN201120489321U CN202381699U CN 202381699 U CN202381699 U CN 202381699U CN 2011204893214 U CN2011204893214 U CN 2011204893214U CN 201120489321 U CN201120489321 U CN 201120489321U CN 202381699 U CN202381699 U CN 202381699U
- Authority
- CN
- China
- Prior art keywords
- oil seal
- skeleton
- outer oil
- framework
- retaining ring
- 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 - Fee Related
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Abstract
The utility model relates to a sealing element, in particular to a combined oil seal. The combined oil seal comprises an outer oil seal, a retaining ring framework and an inner oil seal, wherein the retaining ring framework and the inner oil seal are respectively arranged at the inner side of the outer oil seal; the inner oil seal is arranged below the retaining ring framework; the excircle of the inner oil seal is coated with glue; the excircle of the inner oil seal is in interference fit with the inner surface of the outer oil seal framework; at least one matched lug boss made of an elastic material is arranged at the matched part between the outer oil seal framework and the retaining ring framework; and the retaining ring framework is in interference fit with the matched lug boss on the outer oil seal framework. According to the sealing element, the favorable matching relationship of the combined oil seal is ensured, the phenomenon that products are unqualified because the excircle size of the outer oil seal is increased due to the over great of interference magnitude is avoided and the production cost of the combined oil seal is reduced.
Description
Technical field
The utility model relates to a kind of Sealing, especially a kind of combination oil seal.
Background technique
Often need adopt the combined type oil sealing at the position that needs reinforced seal,, improve installation efficiency to simplify fitting operation.The structure of existing combination oil seal is generally as shown in Figure 1, is made up of outer oil seal, inner oil seal and back-up ring skeleton, and inner oil seal and back-up ring skeleton and outer oil seal interference fit are pressed into and form an integral body in the outer oil seal.The inner oil seal cylindrical has encapsulate layer and the rational interference fit of the inboard formation of outer oil seal skeleton, can prevent that sealing medium is by fitting surface place seepage.Therefore back-up ring skeleton and outer oil seal fitting surface place generally are directly to be combined to form one by back-up ring skeleton and the inboard directly interference fit of outer oil seal skeleton owing to need not undertake sealing function.But because the machining accuracy problem of skeleton, during the combination of back-up ring skeleton, it is not enough to tend to take place the skeleton magnitude of interference, and skeleton is prone to deviate from, or magnitude of interference is excessive, is pressed into difficulty, and causes the outer oil seal excircle dimension to increase easily, surpasses tolerance range, causes product defective.
The model utility content
The purpose of the utility model is to have proposed a kind of combination oil seal, has guaranteed the good matching relationship of combination oil seal, has avoided causing the outer oil seal excircle dimension to increase owing to magnitude of interference is excessive, causes product defective, and has reduced the cost of production of combination oil seal.
The utility model is that the technological scheme below adopting realizes: a kind of combination oil seal; Comprise outer oil seal, back-up ring skeleton and inner oil seal; Back-up ring skeleton and inner oil seal all are arranged on the inboard of outer oil seal, and inner oil seal is arranged on the below of back-up ring skeleton, the cylindrical encapsulate of inner oil seal; Be interference fit between the internal surface of the cylindrical of inner oil seal and outer oil seal skeleton; Wherein, said outer oil seal skeleton and the cooperation place of back-up ring skeleton are provided with at least one and cooperate boss by what elastic material was processed, and the back-up ring skeleton forms interference fit with the boss that cooperates on the outer oil seal skeleton.
The beneficial effect of the utility model is: through cooperate elasticity interference fit boss between of back-up ring skeleton with the outer oil seal skeleton; Replace existing outer oil seal skeleton to cooperate with rigidity between the back-up ring skeleton; At first; Guaranteed the good matching relationship of combination oil seal, avoided causing the outer oil seal excircle dimension to increase, caused product defective owing to magnitude of interference is excessive; Secondly, reduced requirement, reduced the cost of production of combination oil seal the skeleton machining accuracy.
Description of drawings
Fig. 1 is the half sectional view of existing combination oil seal;
Fig. 2 is the half sectional view of combination oil seal in the utility model.
Among the figure: 1 outer oil seal; 2 back-up ring skeletons; 3 inner oil seals; 4 cooperate boss.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 2 is the described combination oil seal of the utility model.This oil sealing comprises outer oil seal 1, back-up ring skeleton 2 and inner oil seal 3, and back-up ring skeleton 2 and inner oil seal 3 all are arranged on the inboard of outer oil seal 1, and inner oil seal 3 is arranged on the below of back-up ring skeleton 2.The cylindrical encapsulate of inner oil seal 3 is interference fit between the internal surface of the cylindrical of inner oil seal 3 and outer oil seal 1 skeleton, prevents that sealing medium is by fitting surface place seepage.The outer oil seal skeleton is provided with the cooperation place of back-up ring skeleton 2 and cooperates boss 4, cooperates boss 4 can be provided with one, also can be provided with a plurality ofly, cooperates boss 4 formation interference fit on back-up ring skeleton 2 and the outer oil seal skeleton.Cooperate the quantity and the width of boss 4 to set, cooperate boss 4 to process by rubber or similar elastic material according to the size of oil sealing.Through back-up ring skeleton 2 and the resilient engagement that cooperates between the boss 4; Avoided the outer oil seal skeleton to cooperate with rigidity between the back-up ring skeleton; Both can guarantee good matching relationship, and can avoid again causing the outer oil seal excircle dimension to increase, and cause product defective owing to magnitude of interference is excessive.
Claims (1)
1. combination oil seal; Comprise outer oil seal (1), back-up ring skeleton (2) and inner oil seal (3); Back-up ring skeleton (2) and inner oil seal (3) all are arranged on the inboard of outer oil seal (1); Inner oil seal (3) is arranged on the below of back-up ring skeleton (2), and the cylindrical encapsulate of inner oil seal (3) is interference fit between the internal surface of the cylindrical of inner oil seal (3) and outer oil seal (1) skeleton; It is characterized in that: said outer oil seal skeleton and the cooperation place of back-up ring skeleton (2) are provided with at least one and cooperate boss (4) by what elastic material was processed, and back-up ring skeleton (2) forms interference fit with the boss (4) that cooperates on the outer oil seal skeleton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204893214U CN202381699U (en) | 2011-11-30 | 2011-11-30 | Combined oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204893214U CN202381699U (en) | 2011-11-30 | 2011-11-30 | Combined oil seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202381699U true CN202381699U (en) | 2012-08-15 |
Family
ID=46630203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204893214U Expired - Fee Related CN202381699U (en) | 2011-11-30 | 2011-11-30 | Combined oil seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202381699U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137476A (en) * | 2021-02-07 | 2021-07-20 | 青岛众力诚达智能科技有限公司 | Sealing structure loaded by reverse lip sealing tape pressing sealing medium |
-
2011
- 2011-11-30 CN CN2011204893214U patent/CN202381699U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137476A (en) * | 2021-02-07 | 2021-07-20 | 青岛众力诚达智能科技有限公司 | Sealing structure loaded by reverse lip sealing tape pressing sealing medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120815 Termination date: 20141130 |
|
| EXPY | Termination of patent right or utility model |