CN201346961Y - Rear axle ventilation plug for automobiles - Google Patents
Rear axle ventilation plug for automobiles Download PDFInfo
- Publication number
- CN201346961Y CN201346961Y CNU2009201262491U CN200920126249U CN201346961Y CN 201346961 Y CN201346961 Y CN 201346961Y CN U2009201262491 U CNU2009201262491 U CN U2009201262491U CN 200920126249 U CN200920126249 U CN 200920126249U CN 201346961 Y CN201346961 Y CN 201346961Y
- Authority
- CN
- China
- Prior art keywords
- plug
- axle
- axle housing
- axle casing
- valve
- 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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- General Details Of Gearings (AREA)
Abstract
The utility model provides a rear axle ventilation plug for automobiles, which adopts an integral rubber component. A plug body is arranged in the middle, and a plug cover is arranged at the top. The plug body is installed on an axle casing and is in interference fit with a circular hole on the axle casing through an annular groove at the waist part. A ventilation hole is formed at the center of the plug body, and a normally closed valve port is arranged on the hole wall at the upper part of the ventilation hole. When pressure in the axle casing rises, the plug is opened, so that the inner cavity of the axle casing can be communicated with the outside atmosphere. When the pressure in the axle casing is not high, the rear axle ventilation plug is closed, and a dust prevention cover prevents dust and muddy water from entering the axle casing. After the temperature and the pressure of gear oil rise, because of the elasticity of rubber, the valve port is opened automatically, and the inner cavity of the axle casing is communicated with the atmosphere, so as to perform the functions of pressure release and oil leakage prevention.
Description
Technical field
The utility model relates to a kind of breather stem vent plug structure of automobile axle.
Background technology
Automobile axle is splashed into axle housing inside for preventing outside muddy water, dust, cause the gear premature wear, with prevent that the interior oil temperature rise from increase the axle housing internal pressure, cause axle-shaft oil seal, main tooth oil sealing place's leakage of oil, on axle housing or final drive casing, breather stem vent plug is set usually.General breather stem vent plug comprises valve body, spring, dust boot three parts, and valve body is weldingly fixed on the axle housing, and dust boot is connected with the valve body riveted joint, and when pressure increased, the spring in the valve body stretched, valve open, and when pressure reduces, spring return, valve closing.Each part of the breather stem vent plug of this class formation all is metal piece usually, easy-to-rust, and each part is to combine, dust boot becomes flexible easily or comes off, and processing technology is complicated, the cost height.
The utility model content
Technical problem to be solved in the utility model provides a kind of vehicle rear axle ventilation plug, and solving each part easy-to-rust of breather stem vent plug, the dust boot problem that comes off easily reaches the good dust-proof ventilatory effect.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of vehicle rear axle ventilation plug is installed on the automobile axle axle housing, and described breather stem vent plug is a whole Rubber Parts, and the centre is a cock body, and the top is the plug cover; Described cock body is installed on the axle housing, and by the annular groove of waist and the circular hole interference fit on the axle housing, there is air extractor vent at the cock body center, and the hole wall on air extractor vent top is provided with valve-closed port, opens when the axle housing internal pressure raises, and is communicated with axle housing inner chamber and outside atmosphere.
Described valve-closed port is oblique offering on hole wall, and low inside and high outside.The hole wall that described air extractor vent top is provided with valve-closed port partly is thinner than other hole wall part.
This rear axle ventilation plug is not closed when the axle housing internal pressure is high, and dust boot stops dust, muddy water to enter axle housing inside, after gear oil temperature, pressure raise, because the elasticity of rubber, valve port is opened automatically, and the axle housing inner chamber communicates with atmosphere, play release, prevent the effect of leakage of oil.
Since above-mentioned breather stem vent plug adopts be elastomeric material after, can avoid original metal parts problem, the problem includes: the corrosion problem; Adopt the single piece form, the part number is three-in-one, has avoided dust boot to be easy to become flexible or come off.Employing is provided with valve port on the hole wall of cock body, can utilize the elasticity of elastomeric material self, and pressure hour is closed valve-closed port, opens valve port when pressure is big.And valve-closed port is designed to low inside and high outside diagonal cut joint form, and pressure hour gas leakage is avoided in more favourable its actv. opening and closing.For reducing response pressure, other position wall thickness of the relative breather stem vent plug of valve port are thinner, because rubber allows deflection bigger, so not high to axle housing punching accuracy requirement.As seen this breather stem vent plug can reach better dustproof, ventilatory effect.
Description of drawings
This rear axle ventilation plug of Fig. 1 with and scheme of installation on back axle.
The specific embodiment
As shown in Figure 1, the utility model provides a kind of rear axle ventilation plug structure with ventilation effect, this breather stem vent plug 1 is a rubber single piece, the centre is a cock body 11, the top is plug cover 12, cock body 11 is installed on the axle housing whole breather stem vent plug by the annular groove of waist and the circular hole interference fit on the axle housing upper half-shell 3.There is air extractor vent at cock body 1 center, and the hole wall on air extractor vent top is provided with valve-closed port 13, and valve-closed port 13 is oblique offering on hole wall, and low inside and high outside, and the hole wall that air extractor vent is provided with valve-closed port partly is thinner than other hole wall part.Valve-closed port is opened when the axle housing internal pressure raises, and is communicated with axle housing inner chamber and outside atmosphere.
Directly be inserted in the through hole of axle housing upper half-shell 3 when breather stem vent plug is installed, maintain and replace is also very convenient.Original metal connection for bbreather pipe on the cancellation back axle, other structures of back axle and connection for bbreather pipe position of mounting hole are constant.Rear axle ventilation plug is not closed when the axle housing internal pressure is high, and dust boot stops dust, muddy water to enter axle housing inside, after gear oil temperature, pressure raise, valve-closed port is opened automatically, and the axle housing inner chamber communicates with atmosphere, plays release, prevent the effect of leakage of oil, 2 is oil blocking cover among the figure.
Claims (3)
1, a kind of vehicle rear axle ventilation plug is installed on the automobile axle axle housing, it is characterized in that, described breather stem vent plug is a whole Rubber Parts, and the centre is a cock body, and the top is the plug cover; Described cock body is installed on the axle housing, and by the annular groove of waist and the circular hole interference fit on the axle housing, there is air extractor vent at the cock body center, and the hole wall on air extractor vent top is provided with valve-closed port, opens when the axle housing internal pressure raises, and is communicated with axle housing inner chamber and outside atmosphere.
2, vehicle rear axle ventilation plug according to claim 1 is characterized in that, described valve-closed port is oblique offering on hole wall, and low inside and high outside.
3, vehicle rear axle ventilation plug according to claim 1 and 2 is characterized in that, the hole wall that described air extractor vent top is provided with valve-closed port partly is thinner than other hole wall part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201262491U CN201346961Y (en) | 2009-01-25 | 2009-01-25 | Rear axle ventilation plug for automobiles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201262491U CN201346961Y (en) | 2009-01-25 | 2009-01-25 | Rear axle ventilation plug for automobiles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201346961Y true CN201346961Y (en) | 2009-11-18 |
Family
ID=41366439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201262491U Expired - Fee Related CN201346961Y (en) | 2009-01-25 | 2009-01-25 | Rear axle ventilation plug for automobiles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201346961Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105291701A (en) * | 2015-11-04 | 2016-02-03 | 合肥海源机械有限公司 | Ventilation-plug oil stopping cover |
| CN106274292A (en) * | 2016-09-18 | 2017-01-04 | 北京汽车研究总院有限公司 | A kind of drive axle breather plug oil baffle plate structure and drive axle |
-
2009
- 2009-01-25 CN CNU2009201262491U patent/CN201346961Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105291701A (en) * | 2015-11-04 | 2016-02-03 | 合肥海源机械有限公司 | Ventilation-plug oil stopping cover |
| CN106274292A (en) * | 2016-09-18 | 2017-01-04 | 北京汽车研究总院有限公司 | A kind of drive axle breather plug oil baffle plate structure and drive axle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091118 Termination date: 20140125 |