Oil-proof breather valve

Abstract

The utility model relates to an oil-proof breather valve which comprises a hollow bolt-shaped valve body, an inner hole of the valve body is divided into a first step hole, a second step hole and a third step hole, a breathable film is placed on the bottom face of the first step hole, and a dustproof cover is tightly matched with the side wall of the first step hole. An inner sealing ring is arranged between the dustproof cover and the breathable film, an oil-proof filter element is tightly matched with the side wall of the second stepped hole, and an oil blocking plug is tightly matched with the side wall of the third stepped hole. According to the novel oil-proof ventilation valve, the valve body is simple in structure, oil is prevented from permeating into the oil-proof filter element, the oil blocking plug of the ventilation film can be freely disassembled and assembled, the ventilation film and the like are assembled in a gland sealing mode, and the production and manufacturing process of the whole oil-proof ventilation valve is simple.

Description

TECHNICAL FIELD

[0001] The utility model relates to the manufacturing technical field of breather valve, especially to an oil-proof breather valve. BACKGROUND

[0002] With the continuous progress of automobile technology, the working environment of key components such as automobile engines and transmissions becomes more complex. For example, in high-performance engines, the working temperature and pressure range of lubricating oil are constantly expanding. In order to ensure the normal operation of these components, prevent the leakage of lubricating oil and the entry of external impurities, while ensuring the balance of internal pressure of the components, the oil-proof breather valve technology is born.

[0003] The miniaturization and integration trend of automobile parts also makes the internal space more compact. Like the differential of the car, in the limited space, it is necessary to ensure good heat dissipation and pressure balance. The traditional sealing method cannot meet the requirements. Because pure sealing will cause internal heat accumulation and pressure rise, leading to sealing failure and lubricating oil leakage.

[0004] Especially in the engine crankcase ventilation system, the oil-proof breather valve plays a key role. When the engine is working, high temperature and pressure changes will occur in the crankcase, and there will be lubricating oil mist. The oil-proof breather valve can exhaust the exhaust gas in the crankcase while preventing the leakage of lubricating oil. If there is no effective oil-proof breather measure, the lubricating oil will be sucked into the intake system, causing problems such as insufficient engine combustion and carbon deposition.

[0005] In automatic and manual transmissions, the oil-proof breather valve can balance the internal pressure. When the transmission is working, the oil temperature will rise, and the internal pressure will increase. Through the oil-proof breather valve, hot air is exhausted, and at the same time, the transmission oil leakage is prevented, ensuring the normal work and service life of the transmission. For example, in the double-clutch transmission, its working environment is relatively complex, and the oil-proof breather valve can well cope with the pressure changes and oil fluctuations generated during frequent gear shifting.

[0006] Chinese patent CN110345287A, the subject name is "a new type of oil-proof breather valve", it discloses "a new type of oil-proof breather valve, including valve body, oil-proof breather membrane and protective cover, the valve body includes main body part and connecting part, the main body part and connecting part are integrally formed, the main body part is equipped with containing cavity, the containing cavity is equipped with filter block, the connecting part is equipped with straight-through air hole, the straight-through air hole is communicated with containing cavity, one end of main body part is equipped with a plurality of buckles, the first through slot is formed between the buckles, the oil-proof breather membrane is arranged in the end of main body part equipped with buckle, the protective cover is connected with main body part through buckle" technical scheme.

[0007] The beneficial effect of the present application is that the oil-proof and air-permeable balance valve has simple structure, is composed of a valve body, an oil-proof and air-permeable film and a protective cover, the valve body is provided with a containing cavity and a straight-through air hole, the valve body and the protective cover are respectively provided with a first through groove and a second through groove, the balance valve is subjected to air pressure conversion through the containing cavity, the straight-through air hole, the first through groove and the second through groove, the internal and external air pressures are balanced, the balance performance of the oil-proof and air-permeable balance valve is good, the filter block, the rib lattice and the inclined surface gap are respectively arranged in the containing cavity, and the step is arranged in the straight-through air hole, so that the oil liquid is effectively prevented from penetrating into the oil-proof and air-permeable film, and the oil penetration phenomenon is avoided.

[0008] However, the valve body of this structure integrates multiple complex technical features, which brings difficulty to production and manufacturing. SUMMARY

[0009] The utility model discloses a kind of oil-proof and air-permeable valves to solve the problems raised in the above background art.

[0010] To solve the above technical problems, the utility model is realized through the following technical measures: an oil-proof and air-permeable valve, characterized by: including hollow bolt-shaped valve body, the inner hole of the valve body is divided into first step hole, second step hole, third step hole, the bottom surface of the first step hole is placed with air-permeable film, the sidewall of the first step hole is tightly fitted with dust cover, inner sealing ring is arranged between the dust cover and the air-permeable film, the sidewall of the second step hole is tightly fitted with oil-proof filter element, the sidewall of the third step hole is tightly fitted with oil-blocking plug.

[0011] Compared with the prior art, the utility model has the advantages that: the valve body of this novel oil-proof and air-permeable valve is simple in structure, the oil-blocking plug of the oil-proof filter element and the air-permeable film can be freely disassembled, the assembly mode of the air-permeable film etc. adopts gland sealing mode, and the production and manufacturing process of the entire oil-proof and air-permeable valve is simple.

[0012] As an improvement of the utility model, the valve body is provided with external threads, and the valve body is provided with a sealing ring groove for placing an outer sealing ring, which is located at the starting root of the external threads. The purpose of selecting this design is to achieve more effective sealing.

[0013] As an improvement of the utility model, the outer wall of the oil-blocking plug is penetrated by a spiral groove. The purpose of selecting this design is that the oil-blocking plug can effectively prevent oil liquid from penetrating into the valve body or the oil-proof and air-permeable film, and avoid the occurrence of oil penetration phenomenon. The outer wall of the oil-blocking plug is penetrated by a spiral groove, which allows oil gas, water gas, dust, salt mist particles and air mixed waste gas to enter the valve body through the small space of the spiral groove.

[0014] As a kind of improvement of the utility model, the material of valve body is aluminum alloy 6061.The purpose of selecting this design: use aluminum alloy 6061 material, greatly increase the overall strength of product, product is not easy to break after stress, improve the limit value of torsion.

[0015] As a kind of improvement of the utility model, dust cover is uniformly distributed with air hole.The purpose of selecting this design: can pass through air, keep the internal and external pressure balance of valve body. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the application and are incorporated herein for illustrative purposes. The application is described and explained with additional specificity and detail through the use of the accompanying drawings in which:

[0017] In the drawings:

[0018] Figure 1 It is the sectional view of oil-proof breather valve of the utility model.

[0019] Figure 2 It is the explosion view of oil-proof breather valve of the utility model.

[0020] Figure 3 It is the perspective view of oil-blocking plug of the utility model.

[0021] Figure 4 It is the schematic diagram of oil-proof breather of the utility model.

[0022] Figure 5 It is the sectional view of valve body of the utility model.

[0023] Reference signs: 1, valve body;2, first step hole;3, second step hole;4, third step hole;5, breather membrane;6, dust cover;7, inner sealing ring;8, oil filter element;9, oil-blocking plug;10, outer thread;11, sealing ring slot hole;12, spiral groove;13, air hole;14, outer sealing ring. DETAILED DESCRIPTION

[0024] The preferred embodiments of the utility model will be described below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are only used to illustrate and explain the utility model, and not to limit the utility model.

[0025] Example 1

[0026] Please refer to Figure 1 -5.

[0027] The embodiment provides an oil-proof and breathable valve, which comprises a hollow bolt-shaped valve body 1, the material of the valve body 1 is aluminum alloy 6061, the surface of the valve body 1 is subjected to anodic oxidation treatment, and the salt mist resistance grade is higher. The use of the aluminum alloy 6061 material greatly increases the overall strength of the product, so that the product is not easy to break after being stressed, and the limit value of the torsion is improved.

[0028] In the embodiment of the utility model application, please refer to Figure 5 The inner hole of the valve body 1 is divided into a first stepped hole 2, a second stepped hole 3 and a third stepped hole 4. Further, the valve body 1 is provided with external threads 10, and the valve body 1 is provided with a sealing ring groove hole 11 for placing an outer sealing ring 14, which is arranged at the starting root of the external threads 10. The purpose of selecting this design is to play a more effective sealing role.

[0029] In the embodiment of the utility model application, please refer to Figure 1 The bottom surface of the first stepped hole 2 is provided with a breathable film 5, the side wall of the first stepped hole 2 is tightly fitted with a dust cover 6, an inner sealing ring 7 is arranged between the dust cover 6 and the breathable film 5, the side wall of the second stepped hole 3 is tightly fitted with an oil-proof filter element 8, and the side wall of the third stepped hole 4 is tightly fitted with an oil-blocking plug 9. The product is internally provided with the oil-proof filter element 8 and the oil-blocking plug 9, so that not only dust and water can be prevented, but also oil gas can be effectively blocked to prevent oil gas from overflowing from the product.

[0030] In the embodiment of the utility model application, please refer to Figure 3 A spiral groove 12 is arranged on the outer wall of the oil-blocking plug 9. The purpose of selecting this design is that the oil-blocking plug 9 can effectively prevent oil from penetrating into the valve body 1 or the oil-proof breathable film 5, so as to avoid oil penetration. The spiral groove 12 is arranged on the outer wall of the oil-blocking plug 9, so that oil gas, water gas, dust, salt mist particles and mixed waste gas such as air can pass through the small space of the spiral groove 12 to the inside of the valve body 1. It should be noted that the inside of the oil-blocking plug 9 can be solid (for example Figure 1 ) or hollow.

[0031] Further, the dust cover 6 is uniformly provided with air holes 13. Air can pass through the air holes 13 to keep the internal and external pressures of the valve body 1 balanced.

[0032] The oil-proof and breathable valve provided by the embodiment is installed as follows: the oil-blocking plug 9 is press-fitted with the third stepped hole 4 (close to the outer thread 10 end) of the valve body 1, the oil-blocking plug 9 is concentric with the second stepped hole 3 of the valve body 1, and the oil-blocking plug 9 is flush with the bottom surface of the valve body 1; the oil-proof filter element 8 is assembled with the second stepped hole 3 of the valve body 1, the oil-proof filter element 8 needs to be concentric with the second stepped hole 3 of the valve body 1, and the oil-proof filter element 8 is installed to the bottom; the rough surface of the breathable membrane 5 faces outward and is placed on the upper surface of the first stepped hole 2 of the valve body 1, and needs to be placed flat; the inner sealing ring 7 is placed above the breathable membrane 5 and is placed flat and attached to the surface of the membrane; the dust cover 6 is pressed with the valve body 1, and there is no gap between the two after pressing, and the gap cannot be seen by the naked eye; and the outer sealing ring 14 is sleeved with the outer thread 10 of the valve body 1, and is installed in place.

[0033] The oil-proof and breathable valve provided by the embodiment is installed as follows: the oil-blocking plug 9 is press-fitted with the third stepped hole 4 (close to the outer thread 10 end) of the valve body 1, the oil-blocking plug 9 is concentric with the second stepped hole 3 of the valve body 1, and the oil-blocking plug 9 is flush with the bottom surface of the valve body 1; the oil-proof filter element 8 is assembled with the second stepped hole 3 of the valve body 1, the oil-proof filter element 8 needs to be concentric with the second stepped hole 3 of the valve body 1, and the oil-proof filter element 8 is installed to the bottom; the rough surface of the breathable membrane 5 faces outward and is placed on the upper surface of the first stepped hole 2 of the valve body 1, and needs to be placed flat; the inner sealing ring 7 is placed above the breathable membrane 5 and is placed flat and attached to the surface of the membrane; the dust cover 6 is pressed with the valve body 1, and there is no gap between the two after pressing, and the gap cannot be seen by the naked eye; and the outer sealing ring 14 is sleeved with the outer thread 10 of the valve body 1, and is installed in place. Figure 4 The oil-proof and breathable valve provided by the embodiment is installed as follows: the oil-blocking plug 9 is press-fitted with the third stepped hole 4 (close to the outer thread 10 end) of the valve body 1, the oil-blocking plug 9 is concentric with the second stepped hole 3 of the valve body 1, and the oil-blocking plug 9 is flush with the bottom surface of the valve body 1; the oil-proof filter element 8 is assembled with the second stepped hole 3 of the valve body 1, the oil-proof filter element 8 needs to be concentric with the second stepped hole 3 of the valve body 1, and the oil-proof filter element 8 is installed to the bottom; the rough surface of the breathable membrane 5 faces outward and is placed on the upper surface of the first stepped hole 2 of the valve body 1, and needs to be placed flat; the inner sealing ring 7 is placed above the breathable membrane 5 and is placed flat and attached to the surface of the membrane; the dust cover 6 is pressed with the valve body 1, and there is no gap between the two after pressing, and the gap cannot be seen by the naked eye; and the outer sealing ring 14 is sleeved with the outer thread 10 of the valve body 1, and is installed in place.

[0034] The oil-proof and breathable valve provided by the embodiment is installed as follows: the oil-blocking plug 9 is press-fitted with the third stepped hole 4 (close to the outer thread 10 end) of the valve body 1, the oil-blocking plug 9 is concentric with the second stepped hole 3 of the valve body 1, and the oil-blocking plug 9 is flush with the bottom surface of the valve body 1; the oil-proof filter element 8 is assembled with the second stepped hole 3 of the valve body 1, the oil-proof filter element 8 needs to be concentric with the second stepped hole 3 of the valve body 1, and the oil-proof filter element 8 is installed to the bottom; the rough surface of the breathable membrane 5 faces outward and is placed on the upper surface of the first stepped hole 2 of the valve body 1, and needs to be placed flat; the inner sealing ring 7 is placed above the breathable membrane 5 and is placed flat and attached to the surface of the membrane; the dust cover 6 is pressed with the valve body 1, and there is no gap between the two after pressing, and the gap cannot be seen by the naked eye; and the outer sealing ring 14 is sleeved with the outer thread 10 of the valve body 1, and is installed in place.

[0035] In the description of the utility model, it needs to be explained that the terms "vertical", "upper", "lower", "horizontal" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as limiting the utility model.

[0036] In the description of the utility model, still need to explain, unless another explicit provision and limitation, term " set ", " install ", " link ", " connect " should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be directly connected, also can indirectly connect through the intermediate medium, can be two element internal communication. For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0037] Finally should be explained: above-mentioned only for the preferred embodiment of the utility model has been, and is not used to limit the utility model, although referring to the foregoing embodiment has carried out detailed description to the utility model, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part of technical features. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. An oil-proof breather valve characterized by: The utility model discloses a valve body (1) including hollow bolt shape, the inner hole of valve body (1) is divided into first step hole (2), second step hole (3), third step hole (4), the bottom surface of first step hole (2) is placed with air permeable membrane (5), the sidewall of first step hole (2) is tightly fitted with dust cover (6), dust cover (6) and air permeable membrane (5) between be provided with inner sealing ring (7), the sidewall of second step hole (3) is tightly fitted with oil filter element (8), the sidewall of third step hole (4) is tightly fitted with oil stopper (9).

2. The oil-resistant breather valve of claim 1, wherein: The valve body (1) is provided with external thread (10), and the valve body (1) is provided with sealing ring groove hole (11) for placing outer sealing ring (14), which is located at the starting root of the external thread (10).

3. The oil-resistant breather valve of claim 1, wherein: The outer wall of the oil stopper (9) is provided with a spiral groove (12) therethrough.

4. The oil-resistant breather valve of claim 1, wherein: The valve body (1) is made of aluminum alloy 6061.

5. The oil-proof breather valve of claim 1, wherein: The dust cover (6) is uniformly provided with air holes (13).

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