A protective device for a wind-cooled air chamber cover

Abstract

This utility model discloses a protective device for an air-cooled valve chamber cover, including a cover body, which is fixed to the open end of the valve chamber by a plurality of cover bolts. A connecting portion is provided on the valve chamber, and the edge of the cover body extends downward to form a wrapping portion matching the contour of the connecting portion. The inner wall of the wrapping portion is completely fitted to the outer wall of the valve chamber. An annular sealing gasket is provided between the contact surfaces of the cover body and the valve chamber. A fine filter screen and a composite filter layer arranged vertically are provided inside the cover body. This utility model has a scientifically sound and reasonable structural design. By ensuring the inner wall of the wrapping portion of the cover body is completely fitted to the contour of the valve chamber connecting portion, and by using the annular sealing gasket and evenly distributed cover bolts for compression, a fully enclosed seal is formed over the valve chamber, significantly improving leakage prevention efficiency and solving the problems of foreign object intrusion and oil leakage caused by incomplete wrapping and insufficient sealing structure design in traditional protective devices.

Description

Technical Field

[0001] This utility model relates to the field of equipment technology, specifically to a protective device for a wind-cooled air chamber cover. Background Technology

[0002] A valve cover is a cover plate installed above the valve chamber to protect the camshaft and, together with the cylinder head, forms a nearly sealed cavity. The oil-gas mixture inside the engine crankshaft ventilation box needs to be separated through the valve cover. Ordinary valve covers only separate oil and gas and cannot reduce noise generated by mechanical components such as the crankshaft, connecting rods, valves, and camshaft inside the engine, thus affecting the vehicle's NVH performance. To address this, existing technology has developed a plastic valve cover and a method for reducing engine noise. This includes a plastic valve cover body with a plastic cover cap. The lower edge of the plastic cover cap is fixedly connected to the upper edge of the plastic valve cover body, and the inner surface of the plastic cover cap and the upper surface of the plastic valve cover body form a closed cavity. Sound-dampening material is placed within this closed cavity. However, the above-mentioned valve cover has limited leak-proof protection and also results in increased structural size and space occupation, making it inconvenient to integrate with the valve chamber mechanism and hindering the overall integrated design of the engine. Therefore, we propose a protective device for the air-cooled door chamber cover. Utility Model Content

[0003] The purpose of this utility model is to provide a protective device for a wind-cooled air chamber cover to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a protective device for a wind-cooled valve chamber cover, comprising a cover body, wherein the cover body is fixed to the opening end of the valve chamber by a plurality of cover bolts;

[0005] The valve chamber is provided with a connecting part, and the edge of the cover body extends downward to form a wrapping part that matches the contour of the connecting part. The inner wall of the wrapping part is completely fitted with the outer wall of the valve chamber. An annular sealing gasket is provided between the contact surfaces of the cover body and the valve chamber. The cover body is provided with a fine filter screen and a composite filter layer arranged vertically inside. The composite filter layer includes a sound-absorbing cotton layer and an oil-absorbing cotton layer. The ends of the fine filter screen and the composite filter layer are provided with locking blocks. The locking blocks are elastically engaged in the limiting seat of the bottom opening.

[0006] In the above scheme, a circular washer is provided between the nut of the cover bolt and the cover body, and the circular washer is an elastic washer or a metal washer.

[0007] In the above scheme, an air vent is provided on the top of the cover body, and a label is provided on the side of the cover body.

[0008] In the above scheme, the cover body adopts a single shell structure, and the cover body is an aluminum alloy, magnesium alloy or glass fiber reinforced composite shell; the inner wall of the cover body is provided with reinforcing ribs.

[0009] In the above scheme, the annular sealing gasket is an elastic rubber gasket with a trapezoidal or O-shaped cross-section. The outer diameter of the annular sealing gasket is larger than the outer diameter of the contact surface between the cover body and the valve chamber.

[0010] In the above scheme, the surface of the cover body is provided with a hollowed-out flow guide groove structure.

[0011] In the above scheme, the cover bolts are evenly distributed on the edge of the cover body, and the number of cover bolts is 4-8.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This air-cooled valve chamber cover protection device has a simple and reasonable structural design and strong practicality. The inner wall of the cover body completely fits the contour of the valve chamber connection part, and with the cooperation of the annular sealing gasket and the evenly distributed cover bolts, a full-enclosed sealing protection for the valve chamber is formed. The sealing gasket fills the gap of the contact surface under the uniform pressure of the bolts, which significantly improves the leakage prevention efficiency and solves the problems of foreign object intrusion and oil leakage caused by incomplete wrapping and insufficient sealing structure design of traditional protection devices. The cover body is equipped with a fine filter and a composite filter layer. The end block is elastically engaged with the limiting seat. The fine filter filters particulate impurities in the air, the oil-absorbing cotton layer absorbs the oil-gas mixture, and the sound-absorbing cotton layer reduces engine noise. The snap-fit ​​structure facilitates quick disassembly and replacement of the filter components, solving the problems of incomplete oil-gas separation, noise transmission and inconvenient maintenance of the filter components inside the valve chamber. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0014] Figure 2 This is a schematic diagram of the structure of this utility model.

[0015] In the figure: 1. Cover body 11. Valve chamber 12. Cover bolt 13. Circular gasket 14. Connecting part 15. Wrapping part 16. Annular sealing gasket 17. Air outlet 18. Label 19. Composite filter layer 191. Sound-absorbing cotton layer 192. Oil-absorbing cotton layer 2. Fine filter screen 21. Locking block 22. Limiting seat. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-2 This utility model provides a technical solution: a protective device for a wind-cooled valve chamber cover, including a cover body 1, wherein the cover body 1 is fixed to the opening end of the valve chamber 11 by a plurality of cover bolts 12;

[0018] A connecting portion 14 is provided on the valve chamber 11. The edge of the cover body 1 extends downward to form a wrapping portion 15 that matches the contour of the connecting portion 14. The inner wall of the wrapping portion 15 is completely fitted with the outer wall of the valve chamber 11. An annular sealing gasket 16 is provided between the contact surfaces of the cover body 1 and the valve chamber 11. A fine filter screen 2 and a composite filter layer 19 arranged vertically are provided inside the cover body 1. The composite filter layer 19 includes a sound-absorbing cotton layer 191 and an oil-absorbing cotton layer 192. A locking block 21 is provided at the end of the fine filter screen 2 and the composite filter layer 19. The locking block 21 is elastically engaged in the limiting seat 22 at the bottom opening.

[0019] The wrapping part 15 fits the contour of the valve chamber connection part 14 and, together with the annular sealing gasket 16, can completely cover the valve chamber opening after being tightened by the cover bolt 12, forming a gapless seal, which solves the problem of foreign object intrusion caused by incomplete wrapping in traditional devices.

[0020] The fine filter 2 filters particulate impurities in the air, the oil-absorbing cotton layer 192 adsorbs the oil-gas mixture, and the sound-absorbing cotton layer 191 reduces engine operating noise. The elastic snap-fit ​​structure of the locking block 21 and the limiting seat 22 allows the filter assembly to be quickly disassembled and installed from the bottom opening, which is convenient for maintenance and replacement and solves the problem of traditional filter structures being difficult to disassemble.

[0021] During installation, the wrapping part 15 is fitted downward along the outer wall of the valve chamber 11, and the sealing gasket 16 is pre-placed between the contact surfaces. After the bolts 12 are tightened evenly, the inner wall of the wrapping part fits tightly against the outer wall of the valve chamber, and the sealing gasket is compressed to fill the tiny gaps. When the engine is running, the air enters the valve chamber after being filtered by the fine filter screen 2, the oil-air mixture is absorbed by the oil-absorbing cotton layer 192, and the noise is attenuated by the sound-absorbing cotton layer 191. During maintenance, the filter assembly can be removed simply by pulling out the clip 21 upwards.

[0022] In the above solution, a circular washer 13 is provided between the nut of the cover bolt 12 and the cover body 1. The circular washer 13 can be an elastic washer or a metal washer. Bolt connection reliability is optimized: the circular washer 13 increases the contact area between the nut and the cover body 1; the elastic washer can adapt to minor deformations caused by vibration; and the metal washer enhances fatigue resistance, preventing seal failure due to bolt loosening, thus solving the problem of easy loosening of traditional bolt connections due to vibration.

[0023] When the bolt 12 is tightened, the gasket 13 is compressed to generate an elastic reaction force, which evenly transmits the nut pressure to the cover body. At the same time, the frictional resistance of the gasket is used to counteract the shear force generated by vibration, ensuring that the bolt torque is stable during long-term use and the sealing gasket 16 remains in an effective compressed state.

[0024] In the above solution, an air outlet 17 is provided on the top of the cover body 1, and a label 18 is provided on the side of the cover body 1. The air outlet 17 is used to discharge high-temperature gas inside the valve chamber to avoid pressure buildup; the hollowed-out guide groove structure cooperates with the air outlet to guide airflow and accelerate heat dissipation on the cover surface; the side label 18 can integrate the company logo or product information to enhance brand recognition and solve the problem of the traditional cover having a single appearance and function.

[0025] When the engine is running, the hot air generated inside the valve chamber is discharged through the air outlet 17, and the cold air outside flows to the air outlet through the guide groove (not shown in the diagram), forming a convection heat dissipation path; the label 18 is integrally formed with the cover body or glued, does not affect the air flow, and also serves as a brand display carrier.

[0026] In the above solution, the cover body 1 adopts a single shell structure, and the cover body 1 is an aluminum alloy, magnesium alloy, or glass fiber reinforced composite shell; the inner wall of the cover body 1 is provided with reinforcing ribs. The single shell structure eliminates the traditional multi-part assembly process and reduces material consumption; lightweight materials such as aluminum alloy reduce weight by 20%-30% compared to steel shells, and the inner wall reinforcing ribs are arranged in a grid or strip pattern to improve the shell's resistance to deformation without significantly increasing weight, thus solving the problems of heavy weight and insufficient strength in traditional structures.

[0027] The single shell is formed by die casting or molding, and the structure such as the wrapping part 15 and mounting holes are integrally formed to avoid splicing gaps; the reinforcing ribs are distributed in stress concentration areas such as around the bolt mounting holes and the edge of the wrapping part. When the engine vibrates or the temperature changes, the reinforcing ribs suppress the deformation of the shell, ensure that the sealing surface is always flat, and maintain the sealing performance.

[0028] In the above solution, the annular sealing gasket 16 is an elastic rubber gasket with a trapezoidal or O-shaped cross-section. The outer diameter of the annular sealing gasket 16 is larger than the outer diameter of the contact surface between the cover body 1 and the valve chamber 11. The elastic rubber material can adapt to minor unevenness of the contact surface. The trapezoidal or O-shaped cross-section generates radial expansion force after the bolts are tightened, increasing the sealing contact area. The outer diameter extends beyond the edge of the contact surface, covering possible leakage paths and solving the problem of edge leakage common with traditional planar sealing gaskets.

[0029] The sealing gasket 16 is pre-installed in the sealing groove of the cover body 1 or directly attached to the contact surface. When the bolt 12 is tightened, the sealing gasket is compressed, and the inclined side of the trapezoidal section or the arc surface of the O-shaped section is tightly attached to the surface of the valve chamber 11, forming a dual function of "pressure sealing + shape sealing". Even if there is a deformation of less than 0.5mm on the contact surface, a leak-free seal can still be achieved through elastic compensation.

[0030] In the above solution, the surface of the cover body 1 is provided with a hollowed-out airflow channel structure. The hollowed-out airflow channel guides air to flow along the surface of the cover, increases the heat dissipation area, reduces the temperature of the cover body, avoids material aging or sealing failure caused by high temperature, and solves the problem of insufficient heat dissipation of traditional covers.

[0031] The air guide channels are arranged in strips or meshes, in line with the direction of the oncoming airflow when the car is moving. When the air flows through the air guide channels, it exchanges heat with the air inside the cover body through the hollow structure. At the same time, it uses the dual mechanism of "air convection + radiation heat dissipation" to quickly dissipate the heat generated by the valve chamber to the outside, ensuring that the cover can work stably for a long time in high-temperature environments.

[0032] In the above scheme, the cover bolts 12 are evenly distributed on the edge of the cover body 1, and the number of cover bolts 12 is 4-8. The even distribution of bolts, such as 4 symmetrical bolts or 8 bolts in a ring, ensures that the sealing gasket 16 is subjected to balanced force, avoiding sealing failure caused by excessive or insufficient local pressure, and solving the leakage risk caused by uneven distribution of bolts in traditional methods.

[0033] The uniform pressure distribution causes the gasket to form a continuous annular sealing band, effectively preventing oil vapor and external dust from entering the valve chamber.

[0034] Working principle:

[0035] The following procedures are included when using this type of air-cooled air chamber cover protection device:

[0036] Installation and sealing process: The cover body 1 is sleeved onto the valve chamber 11 connecting part 14 through the wrapping part 15. The annular sealing gasket 16 is pre-placed between the contact surfaces. 4-8 cover bolts 12 are evenly distributed and pressed by the circular gasket 13, so that the inner wall of the wrapping part is completely attached to the outer wall of the valve chamber, and the sealing gasket is compressed to form a gapless seal.

[0037] Filtration and noise reduction process: After air passes through the fine filter screen 2 to filter particulate impurities, it enters the valve chamber. The oil-gas mixture generated inside is absorbed by the oil-absorbing cotton layer 192. Engine vibration noise is attenuated by the sound-absorbing cotton layer 191. The filter assembly can be quickly disassembled and maintained through the clip 21 and the limit seat 22.

[0038] Heat dissipation and reliability assurance: The lightweight single shell combined with the inner wall reinforcement ribs reduces weight while withstanding engine compartment vibration; the surface guide grooves guide airflow and accelerate heat dissipation; the air outlet 17 discharges internal hot air to ensure stable operation of the cover in high-temperature environments; the label 18 integrates brand logo to achieve unity of function and logo.

[0039] Through the above structural combination, this device achieves multiple functions of "full-coverage sealing protection + high-efficiency filtration + lightweight and robustness + airflow and heat dissipation" for the valve chamber, systematically solving the defects of existing technologies and improving the operational safety and maintenance convenience of the engine valve chamber.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for protecting a cover of a wind tunnel chamber, comprising a cover body (1), characterized in that: The cover body (1) is fixed to the opening end of the valve chamber (11) by a number of cover bolts (12); A connecting part (14) is provided on the valve chamber (11). The edge of the cover body (1) extends downward to form a wrapping part (15) that matches the contour of the connecting part (14). The inner wall of the wrapping part (15) is completely fitted with the outer wall of the valve chamber (11). An annular sealing gasket (16) is provided between the contact surface of the cover body (1) and the valve chamber (11). A fine filter screen (2) and a composite filter layer (19) arranged vertically are provided inside the cover body (1). The composite filter layer (19) includes a sound-absorbing cotton layer (191) and an oil-absorbing cotton layer (192). A locking block (21) is provided at the end of the fine filter screen (2) and the composite filter layer (19). The locking block (21) is elastically engaged in the limiting seat (22) at the bottom opening.

2. An air-cooled valve chest hood guard according to claim 1, characterised in that: A circular washer (13) is provided between the nut of the cover bolt (12) and the cover body (1). The circular washer (13) is an elastic washer or a metal washer.

3. An air cleaner compartment cover guard as set forth in Claim 1 wherein: An air vent (17) is provided on the top of the cover body (1), and a label (18) is provided on the side of the cover body (1).

4. The air-cooled air chamber cover protection device according to claim 1, characterized in that: The cover body (1) adopts a single shell structure, and the cover body (1) is an aluminum alloy, magnesium alloy or glass fiber reinforced composite shell; the inner wall of the cover body (1) is provided with reinforcing ribs.

5. The air-cooled air chamber cover protection device according to claim 1, characterized in that: The annular sealing gasket (16) is an elastic rubber gasket with a trapezoidal or O-shaped cross-section. The outer diameter of the annular sealing gasket (16) is larger than the outer diameter of the contact surface between the cover body (1) and the valve chamber (11).

6. The air-cooled air chamber cover protection device according to claim 1, characterized in that: The surface of the cover body (1) is provided with a hollowed-out flow guide groove structure.

7. The air-cooled air chamber cover protection device according to claim 1, characterized in that: The cover bolts (12) are evenly distributed on the edge of the cover body (1), and the number of cover bolts (12) is 4-8.

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