Dustproof automobile ventilation frame structure

By designing a dustproof connecting filter plate and an elastic connecting structure, combined with the stabilizing measures of a metal sliding plate and magnetic block screw, the problems of dust intake and shaking of the ventilation frame are solved, achieving stable and efficient ventilation.

CN117507759BActive Publication Date: 2026-08-04CHERY AUTOMOBILE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHERY AUTOMOBILE CO LTD
Filing Date
2023-12-14
Publication Date
2026-08-04

AI Technical Summary

Technical Problem

Existing automotive ventilation frames are prone to drawing in dust in negative pressure areas, and they are also prone to shaking or falling off during vehicle operation, affecting ventilation efficiency.

Method used

It adopts a combination design of dustproof connecting filter plate, elastic connection structure and metal sliding plate. The dust cleaning brush plate is driven by spring to clean dust, and the stability of the ventilation frame is improved by magnetic blocks and screw connection.

Benefits of technology

It effectively blocks dust from outside the vehicle, improves ventilation efficiency, and ensures that the ventilation frame remains stable while the vehicle is in motion, preventing it from shaking or falling off.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention relates to the field of automotive ventilation frame technology and discloses a dustproof automotive ventilation frame structure. It includes a mounting frame base, the rear surface of which is fixedly connected to an inner rear door panel, and the front surface of which is fitted with an outer rear door panel. A first ventilation frame blade is fixedly fitted inside the outer rear door panel, and a first fixing rod is fixedly connected to the front surface of the first ventilation frame blade. When air enters the interior of the outer rear door panel, a first spring, affected by the airflow, can oscillate on the surface of the ventilation and dustproof connecting filter plate. This causes a second spring to drive a plastic elastic soft plate and a dust cleaning brush to tap on the surface of the ventilation and dustproof connecting filter plate, thus cleaning the dust accumulated on its surface. Simultaneously, the double-layer ventilation frame blades and ventilation and dustproof connecting filter plate effectively block external dust, thereby improving the ventilation efficiency of the ventilation frame.
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Description

Technical Field

[0001] This invention relates to the field of automotive ventilation frame technology, specifically a dustproof automotive ventilation frame structure. Background Technology

[0002] With the development of the times and the rapid development of automobiles, the market share of automobiles is increasing, and customers have higher and higher requirements for vehicle performance. When dealing with the various driving needs of drivers, OEMs require vehicles to maintain good product quality at all times. As people's economic level improves, automobiles are used more and more frequently as a means of transportation, and people also have higher requirements for the comfort of automobiles. When using automobiles, because the interior of the car is a closed design, in order to improve the air circulation inside the car and improve the comfort of the driver, ventilation frames are needed to ventilate the car. The ventilation frame opens and exhausts in one direction with its own blades to regulate the air pressure inside and outside the car. It is very important for the comfort of air conditioning ventilation and the adjustment of door closing force. The automobile ventilation frame is located in the trunk, specifically in the lower part of the outer side panel of the car. It is the channel connecting the driver's cab and the outside world. Its main function is to regulate the air pressure inside and outside the driver's cab, that is, ventilation. Therefore, the ventilation frame is an indispensable part of automobile ventilation.

[0003] Most modern cars are designed to be rugged, with a square, three-dimensional frame structure and high utilization of sheet metal space. This results in a lack of space for exhaust ventilation frames. Research has shown that the space in the middle of the tailgate is suitable, but because it is a negative pressure area, it is prone to dust accumulation, which can affect the ventilation quality inside the car. In addition, the ventilation frame is connected to the vehicle using a snap-fit ​​method, which makes it susceptible to shaking or falling off due to the bumps and vibrations of the car, thus reducing the ventilation effect. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a dustproof automotive ventilation frame structure. A first spring, influenced by airflow, can oscillate on the surface of the ventilation and dustproof connecting filter plate. This oscillation causes the elastic connecting plate to oscillate, which in turn causes a second spring to move a plastic elastic soft plate and a dust cleaning brush against the surface of the ventilation and dustproof connecting filter plate, effectively cleaning accumulated dust. Simultaneously, the double-layer ventilation frame blades and the ventilation and dustproof connecting filter plate effectively block external dust. The sliding of the first, second, and third metal sliding plates allows the magnetic block on the surface of the third metal sliding plate to attract the outer sheet metal surface of the tailgate. Tightening the first and second screws connects the second and third metal sliding plates, resulting in a more stable ventilation frame during installation and less prone to wobbling. This solves the problems of dust intake and frame wobbling caused by snap-fit ​​installation.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: It includes an installation and connection frame seat, wherein a rear door inner panel is fixedly connected to the rear surface of the installation and connection frame seat, a rear door outer panel is fitted and connected to the front surface of the installation and connection frame seat, a first ventilation frame blade is fixedly fitted and connected to the interior of the rear door outer panel, a first fixing rod is fixedly connected to the front surface of the first ventilation frame blade, a ventilation and dustproof connecting filter plate is fixedly connected to the end of the first fixing rod away from the first ventilation frame blade, a second fixing rod is fixedly connected to the front surface of the ventilation and dustproof connecting filter plate, and a second ventilation frame blade is fixedly connected to the end of the second fixing rod away from the ventilation and dustproof connecting filter plate.

[0008] A first spring is fixedly connected to the front surface of the ventilation and dustproof connecting filter plate. An elastic connecting plate is fixedly connected to the end of the first spring away from the ventilation and dustproof connecting filter plate. A second spring is fixedly connected to the lower surface of the elastic connecting plate. A plastic elastic soft plate is fixedly connected to the end of the second spring away from the elastic connecting plate. A dust cleaning brush is provided on the rear surface of the plastic elastic soft plate, and the dust cleaning brush is in contact with the front surface of the ventilation and dustproof connecting filter plate.

[0009] Preferably, a fitting plate is fixedly connected to the front surface of the mounting frame seat, and limiting connecting plates are fixedly connected to both sides of the rear door outer panel, with the limiting connecting plates fitting against the fitting plate.

[0010] Preferably, both sides of the rear door outer panel are fixedly connected with fitting blocks, and the fitting blocks are fitted and connected with the fitting plate.

[0011] Preferably, both sides of the outer panel of the rear door are fixedly connected to movable connecting longitudinal plates, the side surfaces of the movable connecting longitudinal plates are slidably connected to adjusting sliding plates, and the lower surfaces of the adjusting sliding plates are fixedly connected to fitting baffles, which fit against fitting plates.

[0012] Preferably, a shrinking hollow adjusting plate is fixedly connected to the upper surface of the adjusting sliding plate, a balance telescopic adjusting plate is slidably connected inside the shrinking hollow adjusting plate, and an interlocking friction rubber rod is fitted inside the shrinking hollow adjusting plate, and the interlocking friction rubber rod is fitted and connected to the balance telescopic adjusting plate.

[0013] Preferably, a first metal sliding plate is slidably connected to the interior of the rear door inner panel, a second metal sliding plate is slidably connected to the front surface of the first metal sliding plate, a third metal sliding plate is slidably connected to the side surface of the second metal sliding plate, and a magnetic block is provided on the rear surface of the third metal sliding plate.

[0014] Preferably, the upper surface of the first metal sliding plate is threaded with a first screw, and the first screw is threadedly connected to the second metal sliding plate; the upper surface of the second metal sliding plate is threaded with a second screw, and the second screw is threadedly connected to the third metal sliding plate.

[0015] Preferably, the upper surfaces of both the first metal sliding plate and the second metal sliding plate are provided with multiple threaded holes.

[0016] Preferably, a sealing rubber sleeve is fitted onto the side surface of the inner panel of the rear door, and the sealing rubber sleeve is connected to the mounting frame seat.

[0017] Preferably, a tie rod is fixedly connected to the front surface of the second ventilation frame blade, and both the first and second ventilation frame blades are inclined.

[0018] Compared with the prior art, the present invention provides a dustproof automotive ventilation frame structure, which has the following beneficial effects:

[0019] 1. When the ventilation frame is in use, air enters the interior of the rear door outer panel. The first spring, affected by the airflow, can sway on the surface of the ventilation and dustproof connecting filter plate. When the first spring sways, it can drive the elastic connecting plate to sway. The swaying of the elastic connecting plate causes the second spring to drive the plastic elastic soft plate and the dust cleaning brush to beat on the surface of the ventilation and dustproof connecting filter plate, so as to clean the dust accumulated on the surface of the ventilation and dustproof connecting filter plate. At the same time, the double-layer ventilation frame blades and the ventilation and dustproof connecting filter plate effectively block the dust from outside the vehicle, thereby improving the ventilation efficiency of the ventilation frame.

[0020] 2. This invention utilizes the sliding of the first, second, and third metal sliding plates to facilitate the adjustment of their positions. The magnetic block on the surface of the third metal sliding plate can attract the surface of the sheet metal on the back door. Tightening the first and second screws can connect the second and third metal sliding plates, making the ventilation frame more stable during installation.

[0021] 3. This invention utilizes the extension and retraction of the balance telescopic adjustment plate and the retractable hollow adjustment plate to push the adjustment sliding plate downwards, allowing the adjustment sliding plate to move and extend the balance telescopic adjustment plate out from inside the retractable hollow adjustment plate. When the adjustment sliding plate moves, it can move the fitting baffle, allowing the fitting baffle to fit against the surface of the fitting plate and block the fitting plate, thereby improving the tightness of the fit between the outer panel and the inner panel of the rear door. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the disassembled structure of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the structure at point A in the middle;

[0024] Figure 3 This is a schematic diagram of the overall structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the crossbar structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the rear door inner panel structure of the present invention;

[0027] Figure 6 This is a rear view schematic diagram of the third metal sliding plate structure of the present invention.

[0028] The components include: 1. Mounting and connecting frame seat; 2. Sealing rubber sleeve; 3. Rear door inner panel; 4. First fixing rod; 5. First ventilation frame blade; 6. Ventilation and dustproof connecting filter plate; 7. Second fixing rod; 8. Second ventilation frame blade; 9. Magnetic block; 10. First spring; 11. Rear door outer panel; 12. Plastic elastic soft plate; 13. Dust cleaning brush plate; 14. Second spring; 15. Elastic connecting horizontal plate; 16. Limiting connecting plate; 17. Fitting block; 18. Fitting plate; 19. Fitting friction rubber rod; 20. Shrinkable hollow adjusting plate; 21. Adhesive baffle; 22. Adjusting sliding plate; 23. Moving connecting longitudinal plate; 24. Balance telescopic adjusting plate; 25. Third metal sliding plate; 26. First metal sliding plate; 27. First screw; 28. Second metal sliding plate; 29. ​​Second screw. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1-6 The system includes a mounting frame seat 1, a rear door inner panel 3 fixedly connected to the rear surface of the mounting frame seat 1, a rear door outer panel 11 fitted to the front surface of the mounting frame seat 1, a first ventilation frame blade 5 fixedly fitted to the interior of the rear door outer panel 11, a first fixing rod 4 fixedly connected to the front surface of the first ventilation frame blade 5, a second fixing rod 7 fixedly connected to the front surface of the ventilation and dustproof connecting filter plate 6, a second ventilation frame blade 8 fixedly connected to the end of the second fixing rod 7 away from the ventilation and dustproof connecting filter plate 6, a pull rod fixedly connected to the front surface of the second ventilation frame blade 8, both the first ventilation frame blade 5 and the second ventilation frame blade 8 being inclined, and a sealing rubber sleeve 2 fitted onto the side surface of the rear door inner panel 3. The sleeve 2 is connected to the mounting frame seat 1. The ventilation and dustproof connecting filter plate 6 can be installed between the first ventilation frame blade 5 and the second ventilation frame blade 8 using the first fixing rod 4 and the second fixing rod 7. The double-layer ventilation frame blades plus the ventilation and dustproof connecting filter plate 6 effectively block dust from outside the vehicle. The rear door inner panel 3 is fitted into the rear door outer sheet metal to install the ventilation frame. The sealing rubber sleeve 2 can fit with the connection between the rear door inner panel and the rear door outer sheet metal to improve the sealing of the ventilation frame during installation. After the device is used, the pull rod is pulled to extend the first ventilation frame blade 5, the second ventilation frame blade 8 and the ventilation and dustproof connecting filter plate 6 from the inside of the rear door outer panel 11, which is convenient for cleaning the ventilation frame later.

[0031] A ventilation and dustproof connecting filter plate 6 is fixedly connected to the end of the first fixed rod 4 away from the first ventilation frame blade 5. A first spring 10 is fixedly connected to the front surface of the ventilation and dustproof connecting filter plate 6. An elastic connecting horizontal plate 15 is fixedly connected to the end of the first spring 10 away from the ventilation and dustproof connecting filter plate 6. A second spring 14 is fixedly connected to the lower surface of the elastic connecting horizontal plate 15. A plastic elastic flexible plate 12 is fixedly connected to the end of the second spring 14 away from the elastic connecting horizontal plate 15. A dust cleaning brush plate 13 is provided on the rear surface of the plastic elastic flexible plate 12, and the dust cleaning brush plate 13 is connected to the ventilation and dustproof connecting filter plate. The front surface of the 6 is attached. When the ventilation frame is in use, the elasticity of the first spring 10 allows air to enter the interior of the rear door outer panel 11. The first spring 10 can shake on the surface of the ventilation dustproof connecting filter plate 6 due to the air volume. When the first spring 10 shakes, it can drive the elastic connecting horizontal plate 15 to shake. The shaking of the elastic connecting horizontal plate 15 causes the second spring 14 to drive the plastic elastic soft plate 12 and the dust cleaning brush plate 13 to beat on the surface of the ventilation dustproof connecting filter plate 6, so that it can clean the dust accumulated on the surface of the ventilation dustproof connecting filter plate 6, thereby improving the ventilation efficiency of the ventilation frame.

[0032] A fitting plate 18 is fixedly connected to the front surface of the mounting frame seat 1. Limiting connecting plates 16 are fixedly connected to both sides of the rear door outer panel 11, and the limiting connecting plates 16 are in contact with the fitting plate 18. Fitting blocks 17 are fixedly connected to both sides of the rear door outer panel 11, and the fitting blocks 17 are in contact with the fitting plate 18. Movable connecting longitudinal plates 23 are fixedly connected to both sides of the rear door outer panel 11. Adjustable sliding plates 22 are slidably connected to the side surfaces of the movable connecting longitudinal plates 23. A fitting baffle 21 is fixedly connected to the lower surface of the adjustable sliding plate 22, and the fitting baffle 21 is in contact with the fitting plate 18. A retractable hollow adjusting plate 20 is fixedly connected to the upper surface of the adjusting sliding plate 22. A balanced telescopic adjusting plate 24 is slidably connected inside the retractable hollow adjusting plate 20. A fitting friction rubber rod 19 is fitted inside the retractable hollow adjusting plate 20, and the fitting friction rubber rod 19 is fitted with the balanced telescopic adjusting plate 24. When the ventilation frame is engaged, the flexible plastic of the engagement plate 18 allows it to be bent and engaged with the engagement block 17. The limiting connection plate 16 can limit the engagement plate 18, allowing the outer panel 11 of the rear door to connect with the inner panel 3 of the rear door. The extension and retraction of the balance telescopic adjustment plate 24 and the retractable hollow adjustment plate 20 can push the adjustment sliding plate 22 downward, causing the adjustment sliding plate 22 to move the retractable hollow adjustment plate 20 and extend the balance telescopic adjustment plate 24 from the inside of the retractable hollow adjustment plate 20. When the adjustment sliding plate 22 moves, it can move the contact baffle 21, allowing the contact baffle 21 to contact the surface of the engagement plate 18 and block the engagement plate 18. The engagement friction rubber rod 9 can be pushed through the inside of the retractable hollow adjustment plate 20 and engage with the balance telescopic adjustment plate 24 for fixation, thereby improving the tightness of the engagement between the outer panel 11 of the rear door and the inner panel 3 of the rear door.

[0033] A first metal sliding plate 26 is slidably connected to the interior of the rear door inner panel 3. A second metal sliding plate 28 is slidably connected to the front surface of the first metal sliding plate 26. A third metal sliding plate 25 is slidably connected to the side surface of the second metal sliding plate 28. A magnet 9 is provided on the rear surface of the third metal sliding plate 25. A first screw 27 is threadedly connected to the upper surface of the first metal sliding plate 26, and the first screw 27 is threadedly connected to the second metal sliding plate 28. A second screw 29 is threadedly connected to the upper surface of the second metal sliding plate 28, and the second screw 29 is threadedly connected to the third metal sliding plate 25. Both the upper surfaces of the first metal sliding plate 26 and the second metal sliding plate 28 are provided with multiple threaded holes. When the ventilation frame is connected to the outer sheet metal of the rear door, the sliding of the first metal sliding plate 26, the second metal sliding plate 28 and the third metal sliding plate 25 makes it easy to adjust the position of the first metal sliding plate 26, the second metal sliding plate 28 and the third metal sliding plate 25, so that the magnetic block 9 on the surface of the third metal sliding plate 25 can attract the surface of the outer sheet metal of the rear door. Tightening the first screw 27 and the second screw 29 can connect the second metal sliding plate 28 and the third metal sliding plate 25, making the ventilation frame more stable during installation.

[0034] In use, the rear door inner panel 3 is fitted into the rear door outer sheet metal to install the ventilation frame. The sealing rubber sleeve 2 can fit against the connection between the rear door inner panel and the rear door outer sheet metal, pushing the first metal sliding plate 26, the second metal sliding plate 28, and the third metal sliding plate 25 to slide. Therefore, their positions can be adjusted so that the magnet 9 on the surface of the third metal sliding plate 25 can attract the surface of the rear door outer sheet metal. Tightening the first screw 27 and the second screw 29 can move the second metal sliding plate 26. Plate 28 is connected to the third metal sliding plate 25. The fitting plate 18 is engaged with the fitting block 17. The fitting plate 18 is limited by the limiting connecting plate 16. The adjusting sliding plate 22 is pushed downwards, causing it to move the retractable hollow adjusting plate 20. The balance telescopic adjusting plate 24 extends from the inside of the retractable hollow adjusting plate 20. When the adjusting sliding plate 22 moves, it moves the contact baffle 21, pushing the fitting friction rubber rod 9 through the retractable hollow... The interior of the adjusting plate 20 is fitted and fixed with the balance telescopic adjusting plate 24, so that the fitting baffle 21 can fit against the surface of the fitting plate 18 and block the fitting plate 18, making it easy to connect the rear door outer panel 11 and the rear door inner panel 3. The ventilation and dustproof connecting filter plate 6 can be installed between the first ventilation frame blade 5 and the second ventilation frame blade 8 by using the first fixing rod 4 and the second fixing rod 7. The double-layer ventilation frame blade plus the ventilation and dustproof connecting filter plate 6 effectively blocks the dust outside the vehicle. When the wind enters the interior of the rear door outer panel 11, the first spring 10 can shake on the surface of the ventilation and dustproof connecting filter plate 6 due to the air volume. When the first spring 10 shakes, it can drive the elastic connecting cross plate 15 to shake. The shaking of the elastic connecting cross plate 15 can cause the second spring 14 to drive the plastic elastic soft plate 12 and the dust cleaning brush plate 13 to beat on the surface of the ventilation and dustproof connecting filter plate 6, so that it can clean the dust accumulated on the surface of the ventilation and dustproof connecting filter plate 6, thereby improving the ventilation efficiency of the ventilation frame.

[0035] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dustproof automotive ventilation frame structure, comprising a mounting and connecting frame seat (1), characterized in that: The rear surface of the mounting frame seat (1) is fixedly connected to the inner panel (3) of the rear door, the front surface of the mounting frame seat (1) is fitted with the outer panel (11) of the rear door, the inner surface of the outer panel (11) of the rear door is fixedly fitted with the first ventilation frame blade (5), the front surface of the first ventilation frame blade (5) is fixedly connected with the first fixing rod (4), the end of the first fixing rod (4) away from the first ventilation frame blade (5) is fixedly connected with the ventilation and dustproof connecting filter plate (6), the front surface of the ventilation and dustproof connecting filter plate (6) is fixedly connected with the second fixing rod (7), the end of the second fixing rod (7) away from the ventilation and dustproof connecting filter plate (6) is fixedly connected with the second ventilation frame blade (8); A first spring (10) is fixedly connected to the front surface of the ventilation and dustproof connecting filter plate (6). An elastic connecting plate (15) is fixedly connected to the end of the first spring (10) away from the ventilation and dustproof connecting filter plate (6). A second spring (14) is fixedly connected to the lower surface of the elastic connecting plate (15). A plastic elastic soft plate (12) is fixedly connected to the end of the second spring (14) away from the elastic connecting plate (15). A dust cleaning brush plate (13) is provided on the rear surface of the plastic elastic soft plate (12), and the dust cleaning brush plate (13) is in contact with the front surface of the ventilation and dustproof connecting filter plate (6).

2. The dustproof automotive ventilation frame structure according to claim 1, characterized in that: The front surface of the mounting frame seat (1) is fixedly connected to a fitting plate (18), and both sides of the rear door outer panel (11) are fixedly connected to a limiting connecting plate (16), and the limiting connecting plate (16) is in contact with the fitting plate (18).

3. The dustproof automotive ventilation frame structure according to claim 1, characterized in that: Both sides of the rear door outer panel (11) are fixedly connected with fitting blocks (17), and the fitting blocks (17) are fitted and connected with the fitting plate (18).

4. The dustproof automotive ventilation frame structure according to claim 1, characterized in that: Both sides of the rear door outer panel (11) are fixedly connected to movable connecting longitudinal plates (23). The side surface of the movable connecting longitudinal plates (23) is slidably connected to an adjusting sliding plate (22). The lower surface of the adjusting sliding plate (22) is fixedly connected to a fitting baffle (21), and the fitting baffle (21) is fitted with the fitting plate (18).

5. The dustproof automotive ventilation frame structure according to claim 4, characterized in that: The upper surface of the adjusting sliding plate (22) is fixedly connected to a shrinking hollow adjusting plate (20), and the inside of the shrinking hollow adjusting plate (20) is slidably connected to a balance telescopic adjusting plate (24). The inside of the shrinking hollow adjusting plate (20) is fitted with a fitting friction rubber rod (19), and the fitting friction rubber rod (19) is fitted with the balance telescopic adjusting plate (24).

6. The dustproof automotive ventilation frame structure according to claim 1, characterized in that: The inner panel (3) of the rear door is slidably connected to a first metal sliding plate (26), the front surface of the first metal sliding plate (26) is slidably connected to a second metal sliding plate (28), the side surface of the second metal sliding plate (28) is slidably connected to a third metal sliding plate (25), and the rear surface of the third metal sliding plate (25) is provided with a magnetic block (9).

7. The dustproof automotive ventilation frame structure according to claim 6, characterized in that: The upper surface of the first metal sliding plate (26) is threaded with a first screw (27), and the first screw (27) is threaded with the second metal sliding plate (28). The upper surface of the second metal sliding plate (28) is threaded with a second screw (29), and the second screw (29) is threaded with the third metal sliding plate (25).

8. A dustproof automotive ventilation frame structure according to claim 6, characterized in that: The upper surfaces of the first metal sliding plate (26) and the second metal sliding plate (28) are provided with multiple threaded holes.

9. The dustproof automotive ventilation frame structure according to claim 1, characterized in that: The side surface of the inner panel (3) of the rear door is fitted with a sealing rubber sleeve (2), and the sealing rubber sleeve (2) is connected to the mounting and connecting frame seat (1).

10. A dustproof automotive ventilation frame structure according to claim 1, characterized in that: A tie rod is fixedly connected to the front surface of the second ventilation frame blade (8), and both the first ventilation frame blade (5) and the second ventilation frame blade (8) are inclined.