CN207393953U - A kind of automobile-used rotary oil seal with long dustproof lip - Google Patents
A kind of automobile-used rotary oil seal with long dustproof lip Download PDFInfo
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- CN207393953U CN207393953U CN201721108208.0U CN201721108208U CN207393953U CN 207393953 U CN207393953 U CN 207393953U CN 201721108208 U CN201721108208 U CN 201721108208U CN 207393953 U CN207393953 U CN 207393953U
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- dustproof lip
- dust cover
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- automobile
- long dustproof
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Abstract
The utility model is related to a kind of automobile-used rotary oil seals with long dustproof lip, and including primary seal body, the primary seal body is equipped with outwardly extending long dustproof lip, and the edge of the long dustproof lip is equipped at intervals with several inner concaves and outer convex globoidal.The beneficial effects of the utility model are：After long dustproof lip and rotation axis or dust cover carry out installation interference fit, wave crest is contacted with dust cover or trough contacts with rotation axis and is squeezed deformation so as to form close contact with dust cover or rotation axis, the part of trough or wave crest will not contact to form smaller ventilation space with dust cover or rotation axis, contribute to air circulation, it prevents from forming negative pressure inside primary seal body under the action of pumping, while prevents from forming localized hyperthermia inside primary seal body；The Wave crest and wave trough of long dustproof lip, which designs, causes the contact area of itself and dust cover to reduce, and reduces the dry grinding loss of long dustproof lip, long dustproof lip and dust cover cooperation dust-proof effect are more preferably.
Description
Technical field
The utility model is related to a kind of automobile-used rotary oil seals more particularly to one kind to have good dust-proof and ventilative heat dissipation effect
Automobile-used rotary oil seal, belong to oil seal technique field.
Background technology
In automobile-used rotary oil seal, especially main oil sealing its applying working condition of subtracting of vehicle bridge is relatively severe, and oil sealing is not only
It bears to come from internal larger play and jumping effect, but also to prevent the intrusion of external contaminants, thus using
It is more universal to occur the phenomenon that seal failure in the process.
With the continuous ripe and innovation of auto manufacturing, the relative rotation speed exported now by gearbox had general more in the past
All over being promoted, particularly even there is the phenomenon that double promotion in the rotating speed higher of new energy electric car gearbox output, rotating speed.Due to
Output shaft of gear-box output speed is the input speed that vehicle bridge master subtracts oil sealing, therefore vehicle bridge is to the main adaptability for working condition for subtracting oil sealing
It is required that be consequently increased, simultaneously because the promotion of rotating speed from microcosmic pumping theoretically come analyze the pumping of oil sealing ecto-entad also with
Increase, it is easier to form oil sealing internal negative pressure phenomenon.As primary seal lip is designed with reflux line, then vacuum effect will be more
Add and highlight.It is main subtract oil sealing due to its severe operating mode needs keep out the pollutants such as extraneous dust and muddy water be therefore designed with it is long anti-
Dirt lip is simultaneously sealed with the dust cover interference fit of exterior design, however external non-critical component of the dust cover as gearbox
Its size requirement carried out with oil sealing at cooperation is typically designed to ± 0.5mm some and is even as high as ± 1mm, in addition matched
Normally controllable tolerance design is also in ± 0.5mm or so for the long dustproof lip of rubber, therefore in order to avoid there is clearance fit after assembling
Phenomenon, the actual interference volume of the size that dustproof lip designs after assembling is usually bigger, forms very firm close contact, adds
High rotating speed under the pumping ability that generates will cause to form serious negative pressure appearance between dust cover and the long dustproof lip of oil sealing, finally
Influencing primary seal causes to leak.
Utility model content
The utility model for the existing interference fit of existing automobile-used rotary oil seal formed closed negative pressure space cause it is main close
The situation of leakage is sealed, a kind of automobile-used rotary oil seal with long dustproof lip is provided.
The technical solution that the utility model solves above-mentioned technical problem is as follows：
A kind of automobile-used rotary oil seal with long dustproof lip, including primary seal body, the primary seal body is equipped with to extension
It stretches and towards the inclined long dustproof lip of annular in axle center, the edge of the long dustproof lip is equipped at intervals with several inner concaves and outer convex arc
Face.
Based on the above technical solutions, the utility model can also do following improvement.
Further, the inner concave is arc-shaped, and the inner concave is equal with the arc length of outer convex globoidal, and overall profile is in wave
Shape.
Further, the inner concave is respectively 5 with outer convex globoidal, and overall profile is in " plum blossom " shape.
Further, the edge length of the inner concave is the 1/10~4/5 of outer convex globoidal arc length.
Further, the arc length of the outer convex globoidal is the 1/10~4/5 of inner concave edge length.
Further, the cross sectional shape of the inner concave is one kind in arc, isosceles trapezoid or isosceles triangle.
Long dustproof lip described in the utility model is that (being typically) refers to and (design in oil sealing end face area)
The dustproof lip extended towards primary seal opposite direction.
The beneficial effects of the utility model are：
1) after long dustproof lip and rotation axis or dust cover carry out installation interference fit, outer convex globoidal contacted with dust cover or
Inner concave is contacted with rotation axis is squeezed deformation, so as to form close contact with dust cover or rotation axis, at this time inner concave or
The part of outer convex globoidal will not contact to form smaller ventilation space with dust cover or rotation axis, contribute to air circulation,
It prevents from forming negative pressure inside primary seal body under the action of pumping, while prevents from forming localized hyperthermia inside primary seal body；
2) inner concave of long dustproof lip causes its contact area contacted with rotation axis to reduce with the design of outer convex globoidal, drop
The dry grinding loss of low long dustproof lip.
The mechanics of automobile-used rotary oil seal advantageous effect provided by the utility model is expressed as follows：In long dustproof lip and rotation axis
Or after dust cover carries out installation interference fit, outer convex globoidal is contacted with dust cover or inner concave contacts with rotation axis and is squeezed change
Shape, so as to form close contact with dust cover or rotation axis, at this time the part of inner concave or outer convex globoidal will not with dust cover or
Rotation axis contacts, long dustproof lip deformation after installation, simultaneously because outer convex globoidal or inner concave are subject to rotation axis or dust cover interference
Squeeze and generate deformation, the internal stress suffered by deformation is stored at inner concave or outer convex globoidal, when long dustproof lip and rotation axis or
The internal stress stored when dust cover is worn in use will obtain sustained release until long dustproof lip and rotation axis or
Dust cover reaches dynamic equilibrium state.
Description of the drawings
Fig. 1 is the structure diagram of the utility model embodiment 1；
Fig. 2 is the structure diagram of the utility model embodiment 2；
Fig. 3 is the structure diagram of the utility model embodiment 3；
Fig. 4 is the right view of long dustproof lip in 1 oil enveloping structure of embodiment；
Fig. 5 is the right view of long dustproof lip in 2 oil enveloping structure of embodiment；
Fig. 6 is the right view of long dustproof lip in 3 oil enveloping structure of embodiment；
Fig. 7 is the right view of long dustproof lip in 4 oil enveloping structure of embodiment；
In Fig. 1-Fig. 7,1, primary seal body；2nd, long dustproof lip；3rd, inner concave；4th, outer convex globoidal；5th, dust cover；6th, rotate
Axis.
Specific embodiment
The principle and feature of the utility model are described below in conjunction with example, example is served only for explaining this practicality
It is new, it is not intended to limit the scope of the utility model.
Embodiment 1：
As shown in Fig. 1,4, a kind of automobile-used rotary oil seal with long dustproof lip, including primary seal body 1 and arranged on primary seal
Extend outwardly on body and towards the inclined long dustproof lip 2 in axle center, the edge of long dustproof lip is equipped at intervals with inner concave 3 and outer convex globoidal
4 each 5, inner concave is also arc-shaped, and inner concave is equal with the arc length of outer convex globoidal, and overall profile is in " plum blossom " shape, inner concave with
Rotation axis 6 is contacted and is interference fitted.
Embodiment 2：
As shown in Fig. 2,5, a kind of automobile-used rotary oil seal with long dustproof lip, including primary seal body 1 and arranged on primary seal
Extend outwardly on body and towards the inclined long dustproof lip 2 in axle center, the edge of long dustproof lip is equipped at intervals with inner concave 3 and outer convex globoidal
4 each 5, the cross sectional shape of inner concave is in isosceles trapezoid, and the edge length of inner concave is the 1/3 of outer convex globoidal arc length, inner concave
It contacts and is interference fitted with rotation axis 6.
Embodiment 3：
As shown in Fig. 3,6, a kind of automobile-used rotary oil seal with long dustproof lip, including primary seal body 1 and arranged on primary seal
Extend outwardly on body and towards the inclined long dustproof lip 2 in axle center, the edge of long dustproof lip is equipped at intervals with inner concave 3 and outer convex globoidal
4 each 5, the cross sectional shape of inner concave is arc-shaped, and the edge length of inner concave is the 4/5 of outer convex globoidal arc length, outer convex globoidal
It contacts and is interference fitted with dust cover 5.
Embodiment 4：
As shown in Fig. 3,7, a kind of automobile-used rotary oil seal with long dustproof lip, including primary seal body 1 and arranged on primary seal
Extend outwardly on body and towards the inclined long dustproof lip 2 in axle center, the edge of long dustproof lip is equipped at intervals with inner concave 3 and outer convex globoidal
4 each 6, the cross sectional shape of inner concave is in isosceles triangle, and the edge length of inner concave is the 1/10 of outer convex globoidal arc length, evagination
Cambered surface is contacted and is interference fitted with dust cover 5.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all in this practicality
Within new spirit and principle, any modifications, equivalent replacements and improvements are made should be included in the guarantor of the utility model
Within the scope of shield.
Claims (6)
1. a kind of automobile-used rotary oil seal with long dustproof lip, including primary seal body, the primary seal body, which is equipped with, to extend outwardly
And towards the inclined long dustproof lip of annular in axle center, which is characterized in that the edge of the long dustproof lip is equipped at intervals with several inner concaves
With outer convex globoidal.
2. automobile-used rotary oil seal according to claim 1, which is characterized in that the inner concave is arc-shaped, the inner concave
It is equal with the arc length of outer convex globoidal, overall profile undulate.
3. automobile-used rotary oil seal according to claim 2, which is characterized in that the inner concave is respectively 5 with outer convex globoidal,
Overall profile is in " plum blossom " shape.
4. automobile-used rotary oil seal according to claim 1, which is characterized in that the edge length of the inner concave is outer convex arc
The 1/10~9/10 of face arc length.
5. automobile-used rotary oil seal according to claim 1, which is characterized in that the arc length of the outer convex globoidal is inner concave side
The 1/10~9/10 of edge length.
6. according to the automobile-used rotary oil seal any one of claim 1,4,5, which is characterized in that the section of the inner concave
Shape is one kind in arc, isosceles trapezoid or isosceles triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721108208.0U CN207393953U (en) | 2017-08-31 | 2017-08-31 | A kind of automobile-used rotary oil seal with long dustproof lip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721108208.0U CN207393953U (en) | 2017-08-31 | 2017-08-31 | A kind of automobile-used rotary oil seal with long dustproof lip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207393953U true CN207393953U (en) | 2018-05-22 |
Family
ID=62415544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721108208.0U Active CN207393953U (en) | 2017-08-31 | 2017-08-31 | A kind of automobile-used rotary oil seal with long dustproof lip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207393953U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074241A (en) * | 2021-03-25 | 2021-07-06 | 东风商用车有限公司 | AMT output end sealing structure |
| CN116067573A (en) * | 2023-04-03 | 2023-05-05 | 烟台润蚨祥油封有限公司 | Main assembly oil seal detection test bed that subtracts |
-
2017
- 2017-08-31 CN CN201721108208.0U patent/CN207393953U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113074241A (en) * | 2021-03-25 | 2021-07-06 | 东风商用车有限公司 | AMT output end sealing structure |
| CN116067573A (en) * | 2023-04-03 | 2023-05-05 | 烟台润蚨祥油封有限公司 | Main assembly oil seal detection test bed that subtracts |
| CN116067573B (en) * | 2023-04-03 | 2023-06-06 | 烟台润蚨祥油封有限公司 | Main assembly oil seal detection test bed that subtracts |
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