CN105605227A - Maintenance-free transmission shaft spline pair sealing oil seal - Google Patents
Maintenance-free transmission shaft spline pair sealing oil seal Download PDFInfo
- Publication number
- CN105605227A CN105605227A CN201410684188.6A CN201410684188A CN105605227A CN 105605227 A CN105605227 A CN 105605227A CN 201410684188 A CN201410684188 A CN 201410684188A CN 105605227 A CN105605227 A CN 105605227A
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- CN
- China
- Prior art keywords
- lip
- oil seal
- butadiene
- transmission shaft
- teflon
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- 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.)
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- Sealing With Elastic Sealing Lips (AREA)
Abstract
The invention discloses a maintenance-free transmission shaft spline pair sealing oil seal, comprising an L-shaped metallic framework, wherein butadiene-acrylonitrile rubber is vulcanized inside and outside the L-shaped metallic framework, and an assistant lip with an outward lip opening is arranged in the axle diameter direction of the butadiene-acrylonitrile rubber; the inner side of the butadiene-acrylonitrile rubber is provided with teflon, and a main lip with an inwards inclined lip opening is arranged in the axle diameter direction of the teflon; the inner side of the teflon is also provided with a rubber body; the lip opening of the butadiene-acrylonitrile rubber is formed by double cutting edges, i.e., a main cutting edge and an auxiliary cutting edge, and is of a ladder structure extending outwards. A structure that the teflon and the butadiene-acrylonitrile rubber are combined is adopted, the butadiene-acrylonitrile and the framework are vulcanized into a whole, and a teflon piece is pressed and fixed by the framework; the teflon is the main lip with the inwards inclined lip opening, is mainly used for preventing oil, and is secondly used for preventing dust and silt; the butadiene-acrylonitrile rubber is the assistant lip with the outward lip opening, and is used for preventing the dust and the silt. According to the maintenance-free transmission shaft spline pair sealing oil seal, dustproof, silt preventing and oilproof properties of the oil seal are improved; the wear life of the oil seal is prolonged; the ageing resistance of the oil seal is improved.
Description
Technical field
The present invention relates to the Sealing Technology of power transmission shaft, specifically non-maintaining transmission shaft spline pair hermetic oil seal.
Background technology
State's intermediate solid drive shaft is maintenance type power transmission shaft at present, and client in use needs to refuel maintaining, not high to the sealing requirements of sheath oil seal.
The automobile of non-maintaining power transmission shaft goes on the market, operation conditions is good, non-maintaining power transmission shaft once refuels before dispatching from the factory, client in use no longer refuels and maintains, and will significantly promote service life, therefore very high to the sealing requirements of sheath oil seal, wearability, weatherability and sealing property all need significantly to promote.
Summary of the invention
The present invention is in order to improve the service life of non-maintaining power transmission shaft, and spy proposes non-maintaining transmission shaft spline pair hermetic oil seal.
Technical scheme of the present invention is for this reason, and non-maintaining transmission shaft spline pair hermetic oil seal comprises " L " shape metallic framework, it is characterized in that: the inside and outside sulfuration of " L " shape metallic framework has NBR, and NBR is provided with secondary lip to the direction of the diameter of axle, and lip outwardly; Inner side at NBR is provided with polytetrafluoroethylene (PTFE), and polytetrafluoroethylene (PTFE) is provided with main lip to the direction of the diameter of axle, and the lip of main lip slopes inwardly.
Further improve and be: the inner side of polytetrafluoroethylene (PTFE) is also provided with rubber bodies.
Further improve and be: the lip of NBR is made up of double blade, is divided into main cutting edge and auxiliary cutting edge, and stepped structure stretches out.
Beneficial effect:
The structure that the present invention adopts polytetrafluoroethylene (PTFE) to combine with NBR, NBR and skeleton are sulfided into one, and teflon plate press-fits fixing by skeleton; Wherein polytetrafluoroethylene (PTFE) is main lip, and lip slopes inwardly, mainly in order to grease proofing, secondly in order to dust protection silt; Butadiene acrylonitrile rubber is secondary lip, and lip, is used for dust protection silt outwardly.
It is the intensity in order to increase polytetrafluoroethylene (PTFE) that the inner side of polytetrafluoroethylene (PTFE) is also provided with rubber bodies.
The lip of NBR is made up of double blade, stepped, is equivalent to double blade, and main cutting edge plays sealing function, and auxiliary cutting edge plays supplemental support effect, increases stickiness and servo-actuated property, lift-off seal.
Because polytetrafluoroethylene (PTFE) has good wearability, oil resistivity and weather resisteant, are therefore improved significantly in the sealing of this oil sealing and service life, there is good grease proofing dirt exclusion capabilities, can effectively ensure the lubricant effect of spline pair.
The present invention improves that oil sealing is dustproof, anti-silt and oil preventing performance; Promote oil sealing wear-out life; Promote oil sealing ageing-resistant performance.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is A partial sectional view of the present invention.
In figure, 1 is " L " shape metallic framework, the 2nd, and NBR, the 3rd, polytetrafluoroethylene (PTFE), the 4th, rubber bodies, the 5th, auxiliary cutting edge, the 6th, main cutting edge, the 7th, main lip original state, the 8th, main lip uses state.
Detailed description of the invention
The present invention as shown in Figure 1, 2.
Non-maintaining transmission shaft spline pair hermetic oil seal, comprises " L " shape metallic framework 1, and the inside and outside sulfuration of " L " shape metallic framework 1 has NBR 2, and NBR 2 is provided with secondary lip to the direction of the diameter of axle, and lip outwardly; Be provided with polytetrafluoroethylene (PTFE) 3 in the inner side of NBR 2, polytetrafluoroethylene (PTFE) 3 is provided with main lip to the direction of the diameter of axle, and the lip of main lip slopes inwardly.
The inner side of polytetrafluoroethylene (PTFE) 3 is also provided with rubber bodies 4.
The lip of NBR 2 is made up of double blade, is divided into main cutting edge 6 and auxiliary cutting edge 5, and stepped structure stretches out.
Main lip original state 7 angle that slopes inwardly in the time of original state, convenient installation, just becomes the schematic diagram of main lip use state 8 along with the propelling of spline pair is installed when using.
Claims (3)
1. non-maintaining transmission shaft spline pair hermetic oil seal, comprises " L " shape metallic framework, it is characterized in that: the inside and outside sulfuration of " L " shape metallic framework has NBR, and NBR is provided with secondary lip to the direction of the diameter of axle, and lip outwardly; Inner side at NBR is provided with polytetrafluoroethylene (PTFE), and polytetrafluoroethylene (PTFE) is provided with main lip to the direction of the diameter of axle, and the lip of main lip slopes inwardly.
2. non-maintaining transmission shaft spline pair hermetic oil seal according to claim 1, is characterized in that: the inner side of polytetrafluoroethylene (PTFE) is also provided with rubber bodies.
3. non-maintaining transmission shaft spline pair hermetic oil seal according to claim 1, is characterized in that: the lip of NBR is made up of double blade, is divided into main cutting edge and auxiliary cutting edge, and stepped structure stretches out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410684188.6A CN105605227A (en) | 2014-11-25 | 2014-11-25 | Maintenance-free transmission shaft spline pair sealing oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410684188.6A CN105605227A (en) | 2014-11-25 | 2014-11-25 | Maintenance-free transmission shaft spline pair sealing oil seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105605227A true CN105605227A (en) | 2016-05-25 |
Family
ID=55985409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410684188.6A Pending CN105605227A (en) | 2014-11-25 | 2014-11-25 | Maintenance-free transmission shaft spline pair sealing oil seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105605227A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135674A (en) * | 2021-11-30 | 2022-03-04 | 中国航发湖南动力机械研究所 | Dynamic seal structure for speed reducer |
-
2014
- 2014-11-25 CN CN201410684188.6A patent/CN105605227A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114135674A (en) * | 2021-11-30 | 2022-03-04 | 中国航发湖南动力机械研究所 | Dynamic seal structure for speed reducer |
| CN114135674B (en) * | 2021-11-30 | 2023-11-24 | 中国航发湖南动力机械研究所 | Dynamic seal structure for speed reducer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160525 |
|
| WD01 | Invention patent application deemed withdrawn after publication |