CN211117482U - Transmission breather plug - Google Patents
Transmission breather plug Download PDFInfo
- Publication number
- CN211117482U CN211117482U CN201921848031.7U CN201921848031U CN211117482U CN 211117482 U CN211117482 U CN 211117482U CN 201921848031 U CN201921848031 U CN 201921848031U CN 211117482 U CN211117482 U CN 211117482U
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- vent
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Abstract
The utility model discloses a transmission vent plug, which relates to the mechanical field and comprises a plug main body, wherein the side wall of an upper section internal circular vent cavity of the plug main body is provided with a plurality of vent holes communicated with the outside, the diameter of the upper section internal circular vent cavity of the plug main body is larger than that of a lower section internal circular vent cavity of the plug main body, a step is arranged at the joint of the upper section internal circular vent cavity of the plug main body and the lower section internal circular vent cavity of the plug main body, and the outer circumference of the lower section of the plug main body is provided with a thread; the top end of the plug main body is buckled with a ventilating plug cover. And a steel ball is placed at the step, and the diameter of the steel ball is larger than that of the circular ventilation cavity in the lower section. The utility model discloses can solve current normally open type breather plug because the structure leads to in the whole car test process of wading, water easily enters the gearbox and can't pass through experimental problem.
Description
Technical Field
The utility model belongs to the technical field of the mechanical skill and specifically relates to a breather plug for on automobile engine derailleur.
Background
The automobile engine transmission is arranged on a whole automobile in a horizontal arrangement mode, at present, a ventilation plug which is mostly adopted by the transmission in the industry is normally open, the ventilation plug faces upwards, as shown in figure 1, due to the normal structure of the normally open ventilation plug, the open ventilation plug can exhaust high-temperature gas when the temperature in the transmission box rises, and the air pressure inside and outside the box body is balanced. However, during the wading test of the whole vehicle, water easily enters the gearbox through the vent plug and cannot pass the test.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a derailleur breather plug is provided, it can solve current normally open breather plug because the structure leads to in the whole car test process of wading, water easily enters the gearbox and can't pass through experimental problem.
In order to solve the above problem, the technical scheme of the utility model is that: the transmission vent plug comprises a plug main body, wherein the shape of the plug main body is a circular tube, a plurality of vent holes communicated with the outside are formed in the side wall of an inner circular vent cavity of the upper section of the plug main body, the diameter of the inner circular vent cavity of the upper section of the plug main body is larger than that of an inner circular vent cavity of the lower section of the plug main body, a conical step is arranged at the joint of the inner circular vent cavity of the upper section of the plug main body and the inner circular vent cavity of the lower section of the plug main body, and a section of thread used for being connected with a transmission case is arranged on the; the top end of the plug main body is buckled with a ventilation plug cover, the conical step is provided with a steel ball, the diameter of the steel ball is larger than that of the lower section internal circular ventilation cavity, when the temperature of the box body internal part rises during the operation of the gearbox, when the atmospheric pressure in the lower section internal circular ventilation cavity communicated with the box body is larger than a certain value, the air pressure can push open the steel ball 3 to be discharged from the ventilation hole 4 to reach the balance of internal and external air pressure, meanwhile, due to the gravity action of the steel ball, the hole opening is blocked by the steel ball when the air pressure is reduced, and water drops can not enter the box.
In the above technical solution, a more specific solution may also be: the vent plug cover is connected with the plug main body in a riveting mode through three riveting connection points uniformly distributed on the contact circumference.
Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:
the ventilation plug of the utility model is provided with the steel ball in the inner circular ventilation cavity, the transmission is arranged on the whole vehicle and is placed horizontally, the steel ball is contacted with the hole opening of the ventilation plug under the action of gravity, the air pressure in the transmission box rises to push the steel ball open for exhaust, thereby keeping the air pressure balance inside and outside the box body; meanwhile, the steel ball blocks the orifice, and the normally closed valve can prevent external foreign matters from entering the box body, so that the normally closed valve plays a role of a one-way valve. In the wading test process of the whole vehicle, water drops can not enter the gearbox through the vent plug.
Drawings
FIG. 1 is a schematic view of a conventional normally open vent plug;
fig. 2 is a schematic structural view of the vent plug of the present invention.
The reference numbers in the figures denote: 1. the plug comprises a plug body, 2, a ventilation plug cover, 3, a steel ball, 4 and a ventilation hole.
Detailed Description
The invention will be further described with reference to the following figures and examples:
the transmission vent plug of fig. 2 comprises a plug main body 1 with a circular tube shape, wherein 2 vent holes 4 communicated with the outside are formed in the side wall of an upper section inner circular vent cavity of the plug main body 1, the diameter of the upper section inner circular vent cavity of the plug main body 1 is larger than that of a lower section inner circular vent cavity of the plug main body, a conical step is arranged at the joint of the upper section inner circular vent cavity of the plug main body 1 and the lower section inner circular vent cavity of the plug main body, a steel ball 3 is placed at the conical step, and the diameter of the steel ball 3 is larger than that of the lower section inner circular vent cavity. The top end of the plug main body 1 is buckled with a vent plug cover 2, and the vent plug cover 2 is riveted with the plug main body 1; three riveting and pressing connection points are uniformly distributed on the contact circumference and are fixedly connected. The outer circumference of the lower section of the plug main body 1 is provided with a section of thread used for being connected with a gearbox, and thread glue is coated at the 2-3 teeth of the thread end when the plug main body is connected with the gearbox. When the temperature of the box body rises when the gearbox works, when the atmospheric pressure in the circular ventilation cavity in the lower section of the communicated box body is greater than a certain value, the air pressure can push the steel ball 3 open and is discharged from the ventilation hole 4 to achieve balance of internal and external air pressures, and meanwhile, due to the gravity action of the steel ball, the steel ball blocks the hole opening when the air pressure is reduced, and water drops cannot enter the box body.
Claims (2)
1. A transmission vent plug comprises a plug main body (1), wherein a plurality of vent holes (4) communicated with the outside are formed in the side wall of an upper section internal circular vent cavity of the plug main body (1), the diameter of the upper section internal circular vent cavity of the plug main body (1) is larger than that of a lower section internal circular vent cavity of the plug main body, a step is arranged at the joint of the upper section internal circular vent cavity of the plug main body (1) and the lower section internal circular vent cavity of the plug main body, and a section of thread is arranged on the outer circumference of the lower section of the plug main body (1); the lock joint has ventilative gag (2) on stopper main part (1) top, its characterized in that: and a steel ball (3) is placed at the step, and the diameter of the steel ball (3) is larger than that of the circular ventilation cavity in the lower section.
2. The transmission vent plug of claim 1, wherein: the vent plug cover (2) is connected with the plug main body (1) in a riveting mode through three riveting connection points uniformly distributed on the periphery of the contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921848031.7U CN211117482U (en) | 2019-10-30 | 2019-10-30 | Transmission breather plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921848031.7U CN211117482U (en) | 2019-10-30 | 2019-10-30 | Transmission breather plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211117482U true CN211117482U (en) | 2020-07-28 |
Family
ID=71719479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921848031.7U Active CN211117482U (en) | 2019-10-30 | 2019-10-30 | Transmission breather plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211117482U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719602A (en) * | 2021-07-13 | 2021-11-30 | 东风汽车集团股份有限公司 | Gearbox air breather and gearbox |
-
2019
- 2019-10-30 CN CN201921848031.7U patent/CN211117482U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113719602A (en) * | 2021-07-13 | 2021-11-30 | 东风汽车集团股份有限公司 | Gearbox air breather and gearbox |
| CN113719602B (en) * | 2021-07-13 | 2024-01-16 | 东风汽车集团股份有限公司 | Gearbox ventilation device and gearbox |
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