Waterproof and oil-proof ventilation plug assembly

Abstract

The waterproof and oil-proof ventilation plug assembly comprises a valve deck, a waterproof breathable film, a supporting plate, an oil filtering cotton structure and a valve body, the oil filtering cotton structure is installed in the valve body, the supporting plate is arranged above the oil filtering cotton structure, the circumferential edge of the supporting plate is connected to a boss of the valve body, and the waterproof breathable film is arranged on the valve deck. The interior of the supporting plate is hollow, the top of the supporting plate is fixedly connected with the waterproof breathable film, the valve deck is fixed in the valve body in a buckled mode and located above the waterproof breathable film, a labyrinth structure is integrally formed in an air inlet of the valve body, and a water sputtering preventing structure is arranged at the position, connected with the boss, of the supporting plate. A plurality of through holes are formed in the upper portion of the valve body and located in the circumferential side wall of the upper side of the boss. According to the ventilation plug assembly, the waterproof and oil-proof capacity of the ventilation plug can be enhanced, the service life of the ventilation plug can be prolonged, the ventilation plug assembly can be directly installed on a reduction gearbox for use, the overall structure is compact, use is convenient, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of vent plugs, in particular to a waterproof and oil-proof vent plug assembly. Background Art

[0002] The waterproof and breathable membrane of the existing membrane type vent plug is directly connected to the reduction gearbox. During the operation of the vehicle, due to bumps and impacts, the gear oil in the reduction gearbox may splash into the cavity of the membrane type vent plug. And there is only the waterproof and breathable membrane in the cavity of the membrane type vent plug, so the probability of the gear oil splashing onto the waterproof and breathable membrane is relatively high, and the membrane type vent plug often fails due to the blockage of the waterproof and breathable membrane. Moreover, when affected by the external temperature, the gear oil in the reduction gearbox heats up and generates oil and gas, and the oil and gas are discharged from the waterproof and breathable membrane. Over a long time, there is a risk of blockage of the waterproof and breathable membrane. At the same time, since there is an oil filter cotton between the air inlet and the waterproof and breathable membrane, it is possible that when the reduction gearbox is affected by too low external temperature and generates negative pressure, the waterproof and breathable membrane contacts the oil filter cotton, resulting in a reduction in the air permeability of the waterproof and breathable membrane due to blockage. Content of the Utility Model

[0003] The purpose of the utility model is to provide a waterproof and oil-proof vent plug assembly, to provide a membrane type vent plug with a new structure, to solve the problem that the oil and gas are discharged from the inside of the reducer and penetrate onto the waterproof and breathable membrane of the membrane type vent plug, and the waterproof and breathable membrane passes through the oil and gas for a long time, resulting in the failure of the waterproof and breathable membrane due to blockage; to solve the problem that the oil liquid in the reducer splashes onto the waterproof and breathable membrane of the membrane type vent plug due to bumps, resulting in the blockage of the waterproof and breathable membrane.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A waterproof and oil-proof vent plug assembly of the utility model includes a valve cover, a waterproof and breathable membrane, a support plate, an oil filter cotton structure and a valve body. The oil filter cotton structure is installed inside the valve body. The support plate is arranged above the oil filter cotton structure. The circumferential edge of the support plate is connected to the boss of the valve body. The inside of the support plate is hollow and the top is fixedly connected with the waterproof and breathable membrane. The valve cover is buckled and fixed inside the valve body and is located above the waterproof and breathable membrane. A labyrinth structure is integrally formed in the air inlet of the valve body. A waterproof sputtering structure is arranged at the position where the support plate is connected to the boss. A plurality of through holes are opened on the circumferential side wall of the upper part of the valve body and above the boss.

[0006] Further, the oil filter cotton structure includes multiple layers of oil filter cotton, and the oil filter pore diameters of the multiple layers of oil filter cotton gradually decrease from bottom to top to filter oil and gas particles step by step.

[0007] Further, a cross support column is arranged in the upper part of the support plate, and the waterproof and breathable membrane is fixed on the cross support column.

[0008] Furthermore, the waterproof and breathable membrane is fixedly connected to the support plate by ultrasonic welding.

[0009] Further, the support plate and the valve body are fixedly connected by laser welding.

[0010] Further, the cross-section of the support plate is in a π shape.

[0011] Further, the valve cover and the valve body are fixedly connected by ultrasonic welding.

[0012] Compared with the prior art, the beneficial technical effects of the present utility model are as follows:

[0013] (1) In the waterproof and oil-proof vent plug assembly of the present utility model, a labyrinth structure is integrally formed in the air inlet of the valve body, which can effectively reduce the situation that the gear oil in the speed reducer splashes directly onto the waterproof and breathable membrane due to vehicle bumping. The labyrinth structure can control the discharge path of the oil and gas, and reduce the risk of the oil and gas flushing directly and causing the rapid blockage of the oil filter cotton.

[0014] (2) In the waterproof and oil-proof vent plug assembly of the present utility model, an oil filter cotton structure is installed in the valve body, which can effectively reduce the phenomenon that the oil and gas generated by the gear oil heating due to too high external temperature penetrates into the waterproof and breathable membrane. And the oil filter cotton structure includes multiple layers of oil filter cotton, and the oil filtering apertures of the multiple layers of oil filter cotton gradually decrease from bottom to top to filter the oil and gas particles step by step, further reducing the risk of the oil and gas flushing directly and causing the rapid blockage of the oil filter cotton.

[0015] (3) In the waterproof and oil-proof vent plug assembly of the present utility model, the waterproof and breathable membrane is fixed on the support plate, and a cross support column for supporting the waterproof and breathable membrane is arranged on the support plate, which can effectively prevent the waterproof and breathable membrane from generating negative pressure due to the pressure change in the speed reducer, resulting in the reverse contact of the waterproof and breathable membrane with the oil filter cotton, and avoiding the product failure caused by the blockage of the waterproof and breathable membrane.

[0016] (4) In the waterproof and oil-proof vent plug assembly of the present utility model, a waterproof sputtering structure is arranged at the position where the support plate is connected to the boss, which can prevent the accumulation of water in the vent plug breathable membrane cavity due to liquid sputtering, and reduce the risk of corrosion and damage of the waterproof and breathable membrane.

[0017] (5) The waterproof and oil-proof vent plug assembly of the present utility model can enhance the waterproof and oil-proof capabilities of the vent plug assembly by setting the valve cover, the waterproof and breathable membrane, the support plate, the oil filter cotton structure and the valve body, solve the problems of blockage and failure of the waterproof and breathable membrane caused by the oil and gas discharged from the inside of the reducer and infiltrating onto the waterproof and breathable membrane of the membrane type vent plug. At the same time, it can avoid the oil in the reducer splashing onto the waterproof and breathable membrane due to bumping, effectively extend the service life of the vent plug assembly, expand the application range of the vent plug assembly, and can be directly installed on the speed reducer for use. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a schematic external structure diagram of the waterproof and oil-proof breather plug assembly of the present invention;

[0020] Figure 2 It is a schematic internal structure diagram of the waterproof and oil-proof breather plug assembly of the present invention;

[0021] Figure 3 It is a three-dimensional structure schematic diagram of the waterproof and oil-proof breather plug assembly of the present invention from one angle;

[0022] Figure 4 It is a three-dimensional structure schematic diagram of the waterproof and oil-proof breather plug assembly of the present invention from another angle;

[0023] Figure 5 It is an exploded view of the waterproof and oil-proof breather plug assembly of the present invention.

[0024] Description of the reference numerals: 1. Valve cover; 2. Waterproof and breathable membrane; 3. Support plate; 31. Waterproof sputtering structure; 4. Oil filter cotton structure; 5. Valve body; 51. Labyrinth structure. Detailed Embodiments

[0025] The following will describe in detail the embodiments of the present invention. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] The following will describe in detail the technical solutions provided by the embodiments of the present utility model with reference to the accompanying drawings.

[0029] As Figures 1 to 5 shown, the waterproof and oil-proof breather plug assembly of the embodiment of the present utility model includes a valve cover 1, a waterproof breathable membrane 2, a support plate 3, an oil filter cotton structure 4, and a valve body 5. The oil filter cotton structure 4 is installed inside the valve body 5. A support plate 3 is arranged above the oil filter cotton structure 4. The circumferential edge of the support plate 3 is connected to the boss of the valve body 5. The inside of the support plate 3 is hollow and the top is fixedly connected with the waterproof breathable membrane 2. Among them, the oil filter cotton structure 4 is in the shape of a stepped shaft, its upper part extends into the support plate 3, and its bottom is located at the inner bottom of the valve body 5. The valve cover 1 is buckled and fixed inside the valve body 5 and is located above the waterproof breathable membrane 2. As Figure 2 shown, a labyrinth structure 51 is integrally formed in the air inlet of the valve body 5. A waterproof sputtering structure 31 is arranged at the position where the support plate 3 is connected to the boss. A plurality of through holes are opened on the circumferential side wall of the upper part of the valve body 5 and above the boss.

[0030] In this embodiment, by integrally forming a labyrinth structure 51 in the air inlet of the valve body 5, the phenomenon that the gear oil in the reduction box directly splashes onto the waterproof breathable membrane 2 due to vehicle bumps can be effectively reduced. The labyrinth structure 51 can control the discharge path of the oil and gas, and reduce the risk of the oil and gas directly flushing and causing the rapid blockage of the oil filter cotton. Among them, by arranging a waterproof sputtering structure 31 at the position where the support plate 3 is connected to the boss, the phenomenon of water accumulation in the breather plug breathable membrane cavity caused by liquid sputtering can be prevented, and the risk of corrosion and damage of the waterproof breathable membrane 2 can be reduced.

[0031] Preferably, the oil filter cotton structure 4 includes multiple layers of oil filter cotton, and the oil filter pore diameters of the multiple layers of oil filter cotton gradually decrease from bottom to top. By installing the oil filter cotton structure 4 inside the valve body 5, the phenomenon that the oil and gas generated by the gear oil heating due to too high external temperature penetrates into the waterproof breathable membrane 2 can be effectively reduced. And the oil filter pore diameters of the multiple layers of oil filter cotton gradually decrease from bottom to top to gradually filter the oil and gas particles and reduce the risk of the oil and gas directly flushing and causing the rapid blockage of the oil filter cotton.

[0032] And, as Figure 5As shown, a cross support column is provided in the upper part of the support plate 3, and the waterproof breathable membrane 2 is fixed on the cross support column. At this time, by fixing the waterproof breathable membrane 2 on the support plate 3, and providing a cross support column for supporting the waterproof breathable membrane 2 on the support plate 3, the cross support column is used to isolate the waterproof breathable membrane 2 from the oil filter cotton structure 4, which can effectively prevent the waterproof breathable membrane 2 from generating negative pressure due to the pressure change in the reduction box, thereby causing the waterproof breathable membrane 2 to reversely contact the oil filter cotton, and avoid product failure caused by blockage of the waterproof breathable membrane 2. Preferably, the waterproof breathable membrane 2 is fixedly connected to the support plate 3 by ultrasonic welding, and the cross section of the support plate 3 is π-shaped.

[0033] The support plate 3 and the valve body 5 are fixedly connected by laser welding, and the valve cover 1 and the valve body 5 are fixedly connected by ultrasonic welding.

[0034] like Figure 5 As shown, when installing the waterproof and oil-proof vent plug assembly of this embodiment, the waterproof breathable membrane 2 is first fixedly connected to the support plate 3 by ultrasonic welding, and then the oil filter cotton structure 4 is installed in the cavity of the valve body 5, and the welded support plate 3 is installed in the valve body 5 on which the oil filter cotton structure 4 has been installed. At this time, the bottom of the support plate 3 abuts against the oil filter cotton structure 4, and then the support plate 3 and the valve body 5 are fixedly connected by laser welding, and the valve cover 1 and the valve body 5 to which the support plate 3 is welded are welded together by ultrasonic welding, thus completing the installation of the overall structure of the vent plug assembly.

[0035] The waterproof and oil-proof breather plug assembly of the utility model can enhance the waterproof and oil-proof capabilities of the breather plug assembly by arranging a valve cover, a waterproof and breathable membrane, a support plate, an oil filter cotton structure and a valve body, and solves the problem of clogging and failure of the waterproof and breathable membrane caused by oil and gas discharged from the inside of the reducer and infiltrating into the waterproof and breathable membrane of the membrane-type breather plug. At the same time, it can prevent the oil in the reducer from splashing onto the waterproof and breathable membrane due to bumps, effectively extending the service life of the breather plug assembly, expanding the scope of use of the breather plug, and can be directly installed on the reducer for use, and the overall structure is compact, easy to use, and highly practical.

[0036] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A waterproof and oil-proof vent plug assembly, characterized in that: It includes a valve cover, a waterproof breathable membrane, a support plate, an oil filter cotton structure and a valve body, the oil filter cotton structure is installed in the valve body, the support plate is arranged above the oil filter cotton structure, the circumferential edge of the support plate is connected to the boss of the valve body, the interior of the support plate is hollow and the waterproof breathable membrane is fixedly connected to the top, the valve cover is buckled and fixed in the valve body and is located above the waterproof breathable membrane, a maze structure is integrally formed in the air inlet of the valve body, a waterproof splashing structure is arranged at the position where the support plate connects with the boss, and a plurality of through holes are opened on the circumferential side wall of the upper part of the valve body and located on the upper side of the boss.

2. A waterproof and oil-proof vent plug assembly according to claim 1, characterized in that: The oil filter cotton structure includes multiple layers of oil filter cotton, and the oil filter pore sizes of the multiple layers of the oil filter cotton decrease from bottom to top in order to filter oil and gas particles step by step.

3. A waterproof and oil-proof vent plug assembly according to claim 1, characterized in that: A cross support column is arranged on the upper inner part of the support plate, and the waterproof breathable membrane is fixed on the cross support column.

4. A waterproof and oil-proof vent plug assembly according to claim 1, characterized in that: The waterproof and breathable membrane is fixedly connected to the support plate by ultrasonic welding.

5. The waterproof and oil-proof vent plug assembly according to claim 1, characterized in that: The support plate and the valve body are fixedly connected by laser welding.

6. A waterproof and oil-proof vent plug assembly according to claim 1, characterized in that: The cross section of the support plate is in a π shape.

7. A waterproof and oil-proof vent plug assembly according to any one of claims 1 to 6, characterized in that: The valve cover is fixedly connected to the valve body by ultrasonic welding.

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