A ventilation cover plate sealing structure

Abstract

The present invention discloses a ventilation cover sealing structure, aiming to solve the deficiency in the prior art that the connection structure of the ventilation cover is difficult to seal the large gap between the front cover and the front cabin beam. The present invention solves the above technical problems through the following technical solutions. One end of the ventilation cover close to the engine front cover is provided with a second sealing structure. The second sealing structure includes a guiding strip. One side of the guiding strip close to the engine front cover is provided with a first sealing cavity and a second sealing cavity. The side of the guiding strip away from the engine front cover is provided with an installation groove. An installation plate is arranged on the front cabin cross beam, and the installation plate is clamped in the installation groove. One end of the ventilation cover close to the engine front cover is attached to the installation plate. By arranging the first sealing cavity and the second sealing cavity in the guiding strip of the second sealing structure, a double-bubble structure is formed through the first sealing cavity and the second sealing cavity. By setting the double-bubble structure, the large gap between the ventilation cover and the front cabin cross beam can be sealed.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive ventilation covers, and more specifically, it relates to a sealing structure for a ventilation cover. Background Art

[0002] An automotive ventilation cover is an important part of the vehicle front-end system and is used for installing the front windshield. The ventilation cover can cover components such as the front windshield wiper motor and the front-end sheet metal. Its structure and sealing performance will directly affect the layout of the entire vehicle and are related to the safety, comfort, and convenience of installation and maintenance of the vehicle.

[0003] In the prior art, the sealing strip has a simple structure and basically adopts a single-bubble structure. The gap between the crossbeam and the front cover is small, resulting in problems such as a small deformation space for the front cover during a collision and a reduced collision rating of the front cover.

[0004] For example, Chinese Patent Publication No. CN108423072A, with a publication date of August 21, 2018, and an invention title of "Automotive Ventilation Cover Connection Structure". This application discloses an automotive ventilation cover connection structure and specifically discloses the following technical features, including a ventilation cover, a front windshield, a hood, a water guide main board, a connection structure, and a sealing strip connection structure. The front windshield is above the ventilation cover, the hood is above the ventilation cover on the side away from the front windshield, and the water guide main board is below the ventilation cover; the connection structure includes a support plate, a connection column, and a connecting member. The support plate is below the ventilation cover and one end of the support plate is fixedly connected to the water guide main board. The connecting member is arranged between the ventilation cover and the support plate. The connecting member is provided with a clamping hole along the Z direction, and the connection column protrudes from the ventilation cover and is clamped in the clamping hole. The above application document discloses a ventilation cover connection structure, which mainly adopts a single-bubble structure. This structure can only be applied to the structure with a reduced gap between the front cover and the front cabin crossbeam, and cannot be set for a larger gap structure between the front cover and the front cabin crossbeam; moreover, the structure at the connection between the front windshield and the ventilation cover is very complex and the installation is very inconvenient. Summary of the Invention

[0005] The present invention overcomes the deficiency that the ventilation cover connection structure in the prior art is difficult to seal a large gap between the front cover and the front cabin crossbeam, and provides a sealing structure for a ventilation cover, which can improve the sealing effect between the front cover and the front cabin crossbeam.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions: A ventilation cover sealing structure, including a ventilation cover, a front windshield, an engine hood, and a front cabin cross beam. A first sealing structure is provided at one end of the ventilation cover close to the front windshield, and a second sealing structure is provided at one end of the ventilation cover close to the engine hood. The second sealing structure includes a guide strip. A first sealing cavity and a second sealing cavity are provided on one side of the guide strip close to the engine hood, and an installation groove is provided on the side of the guide strip away from the engine hood. An installation plate is provided on the front cabin cross beam, and the installation plate is clamped in the installation groove. One end of the ventilation cover close to the engine hood is attached to the installation plate.

[0007] The present invention sets a second sealing structure between the ventilation cover and the engine hood, and a first sealing cavity and a second sealing cavity are arranged in the guide strip of the second sealing structure, so that a double-bubble structure is formed by the first sealing cavity and the second sealing cavity. By setting the double-bubble structure, the large gap between the ventilation cover and the front cabin cross beam can be sealed, thereby improving the sealing effect and sound insulation effect between the ventilation cover and the front cabin cross beam. At the same time, the present invention makes the installation of the second sealing structure very convenient by clamping the installation plate and the ventilation cover in the installation groove. Therefore, the present invention has the characteristics of simple structure, being able to seal a large gap, and having good sealing and sound insulation effects.

[0008] Preferably, clamping strips are provided on the inner side walls on both sides of the installation groove, and the clamping strips are inclined towards the bottom of the installation groove.

[0009] By setting the clamping strips to be inclined towards the bottom of the installation groove, when installing the installation plate in the installation groove, it is easy to insert and install, and at the same time, it can play a good limiting function on the installation plate.

[0010] Preferably, a sealing strip is provided on one side of the installation groove close to the ventilation cover, and the sealing strip wraps and covers the end of the ventilation cover close to the engine hood.

[0011] The sealing strip further seals by covering the end of the engine hood close to the ventilation cover.

[0012] Preferably, the first sealing structure includes a connecting strip and a glass sealing strip. The connecting strip is fixedly provided at the end of the ventilation cover close to the front windshield, and the glass sealing strip is in sealing contact with the front windshield.

[0013] By setting the first sealing structure as a connecting strip and a glass sealing strip, the first sealing structure can be well installed on the ventilation cover through the connecting strip, and at the same time, the sealing effect between the ventilation cover and the front windshield is improved by the contact sealing between the glass sealing strip and the glass.

[0014] Preferably, the material of the glass sealing strip is ethylene propylene diene monomer (EPDM) rubber with a Shore hardness of 60 degrees, and the material of the connecting strip is EPDM rubber with a Shore hardness of 80 degrees.

[0015] The glass sealing strip is made of EPDM rubber with a Shore hardness of 60 degrees. Since the EPDM rubber with a Shore hardness of 80 degrees is relatively soft, it can increase the contact area with the front windshield, thereby improving the sealing effect between the front windshield and the glass sealing strip. And the connecting strip is made of EPDM rubber with a Shore hardness of 80 degrees. Since the EPDM rubber with a Shore hardness of 80 degrees is relatively hard, the connection between the connecting strip and the ventilation cover plate can be made more firm, improving the service life of the first sealing structure and the ventilation cover plate.

[0016] Preferably, a steel strip is provided inside the side wall of the installation groove.

[0017] By providing a steel strip inside the installation groove, the overall strength of the installation groove can be improved.

[0018] Preferably, a sealing groove cooperating with the second sealing cavity is provided inside the engine hood.

[0019] The sealing groove is provided on the engine hood, so that the second sealing cavity can cooperate with the sealing groove, making the fit between the second sealing cavity and the sealing groove closer.

[0020] Preferably, an airbag buffer strip is provided below the front end of the engine hood, and the airbag buffer strip is connected to the second sealing cavity through an air duct.

[0021] In actual use, it is found that due to the special structures of the sealing groove and the second sealing cavity, when the engine hood is closed, the sealing effect between the sealing groove and the second sealing cavity is not ideal. Although by increasing the amount of gas in the second sealing cavity, the effect of close fit between the second sealing cavity and the sealing groove can be achieved, but due to the limited width of the sealing groove, and the width of the second sealing cavity increases due to the large amount of gas in it, the second sealing cavity cannot be well clamped in the sealing groove. Therefore, the airbag buffer strip and the air duct are provided. When the engine hood is opened, the amount of gas in the second sealing cavity is less at this time; when the engine hood is closed, the second sealing cavity can directly be clamped into the sealing groove. When the engine hood is completely closed, the airbag buffer strip is compressed, and the gas in the compressed airbag buffer strip enters the second sealing cavity through the air duct, increasing the gas inside the second sealing cavity, which causes the second sealing cavity to expand and fit completely with the sealing groove, improving the sealing performance between the second sealing cavity and the sealing groove. At the same time, by providing the airbag buffer strip, the impact force when the engine hood is closed can also be buffered.

[0022] Preferably, a return spring is arranged inside the airbag buffer strip, and the return spring abuts against both sides of the airbag buffer strip.

[0023] By arranging a return spring inside the airbag buffer strip, when the engine hood is opened, the airbag buffer strip can be expanded by the restoring force of the return spring itself, so that when the engine hood is opened, the airbag buffer strip can automatically recover the gas in the second sealing cavity, reducing the gas in the second sealing cavity.

[0024] Compared with the prior art, the beneficial effects of the present invention are: (1) The structure is simple, it can seal a large gap, and the sealing and sound insulation effects are good; (2) It can automatically inflate the second sealing cavity when the engine hood is closed, improving the sealing effect between the second sealing cavity and the sealing groove, and at the same time improving the sealing effect between the front hood and the front cabin cross beam. Description of the Drawings

[0025] Figure 1 is a cross-sectional view of the first embodiment of the present invention;

[0026] Figure 2 is Figure 1 a partial enlarged view of area A in

[0027] Figure 3 is Figure 1 a partial enlarged view of area B in

[0028] Figure 4 is a cross-sectional view of the second embodiment of the present invention;

[0029] Figure 5 is

[0030] Figure 6 a partial enlarged view of area C of the present invention;

[0031] In the figure: 1. Ventilation cover plate, 2. Front windshield, 3. Engine hood, 4. Front cabin cross beam, 41. Mounting plate, 5. First sealing structure, 51. Connecting strip, 52. Glass sealing strip, 6. Second sealing structure, 61. Guide strip, 611. First sealing cavity, 612. Second sealing cavity, 62. Mounting groove, 621. Clamping strip, 622. Steel strip, 63. Sealing strip, 7. Airbag buffer strip, 71. Air duct, 72. Return spring, 8. Nylon rope. Detailed Embodiments

[0032] The technical solutions of the present invention will be further specifically described below through specific embodiments and in combination with the drawings:

[0033] Embodiment 1: Refer toFigures 1 to 3 As shown in the figure, a ventilation cover plate sealing structure includes a ventilation cover plate 1, a front windshield 2, an engine hood 3 and a front cabin cross beam 4. A first sealing structure 5 is provided at one end of the ventilation cover plate 1 close to the front windshield 2. The first sealing structure 5 includes a connecting strip 51 and a glass sealing strip 52. The connecting strip 51 is fixedly arranged at the end of the ventilation cover plate 1 close to the front windshield 2, and the glass sealing strip 52 is in close contact and sealed with the front windshield 2; a second sealing structure 6 is provided at one end of the ventilation cover plate 1 close to the engine hood 3. The second sealing structure 6 includes a guiding strip 61. A first sealing cavity 611 and a second sealing cavity 612 are arranged inside one side of the guiding strip 61 close to the engine hood 3. An installation groove 62 is arranged on the side of the guiding strip 61 away from the engine hood 3. An installation plate 41 is arranged on the front cabin cross beam 4, and the installation plate 41 is clamped in the installation groove 62 together. One end of the ventilation cover plate 1 close to the engine hood 3 is in close contact with the installation plate 41.

[0034] Clamping strips 621 are arranged on the inner side walls on both sides of the installation groove 62, and the clamping strips 621 are inclined towards the bottom of the installation groove 62. A steel belt 622 is arranged inside the side wall of the installation groove 62.

[0035] A sealing strip 63 is arranged on one side of the installation groove 62 close to the ventilation cover plate 1, and the sealing strip 63 wraps and covers the end of the ventilation cover plate 1 on the side close to the engine hood 3. It should be noted that a nylon rope 8 is arranged in the cavity formed between the sealing strip 62 and the side wall of the installation groove. When the second sealing structure 6 is installed, by pulling the nylon rope 8, the sealing strip 63 can wrap and cover the end of the ventilation cover plate 1 close to the engine hood 3.

[0036] In this embodiment, there are specific requirements for the specific materials of the relevant sealing structures. The materials of the outer surfaces of the first sealing cavity 611 and the second sealing cavity 612 are both set as ethylene propylene diene monomer rubber materials with a Shore hardness of 60 degrees. The material of the installation groove 62 is ethylene propylene diene monomer rubber material with a Shore hardness of 60 degrees. The material of the sealing strip 63 is ethylene propylene diene monomer rubber material with a Shore hardness of 60 degrees. The material of the glass sealing strip 52 is made of ethylene propylene diene monomer rubber material with a Shore hardness of 60 degrees. The connecting strip 51 is made of ethylene propylene diene monomer rubber with a Shore hardness of 80 degrees. Making the glass sealing strip 52 of ethylene propylene diene monomer rubber material with a Shore hardness of 60 degrees, since the ethylene propylene diene monomer rubber material with a Shore hardness of 80 degrees is relatively soft, it can increase the contact area with the front windshield, thereby improving the sealing effect between the front windshield and the glass sealing strip; while using the ethylene propylene diene monomer rubber with a Shore hardness of 80 degrees for the material of the connecting strip 51, because the ethylene propylene diene monomer rubber with a Shore hardness of 80 degrees has a relatively high hardness, it can make the connection between the connecting strip and the ventilation cover plate more firm and improve the service life of the first sealing structure and the ventilation cover plate.

[0037] The working principle of the present invention is as follows: The present invention sets a second sealing structure 6 between the ventilation cover plate 1 and the engine front cover 3, and a first sealing cavity 611 and a second sealing cavity 612 are arranged in the guiding strip of the second sealing structure, so that a double-bubble structure is formed through the first sealing cavity 611 and the second sealing cavity 612. By setting the double-bubble structure, the large gap between the ventilation cover plate 1 and the front cabin cross beam 4 can be sealed, thereby improving the sealing effect and sound insulation effect between the ventilation cover plate 1 and the front cabin cross beam 4; at the same time, the present invention makes it very convenient to install the second sealing structure 6 by clamping the mounting plate 41 and the ventilation cover plate 1 in the mounting groove 62; therefore, the present invention has the characteristics of simple structure, being able to seal a large gap, and having good sealing and sound insulation effects.

[0038] By setting the clamping strip 621 to be inclined towards the bottom of the mounting groove 62, when the mounting plate 41 is installed in the mounting groove 62, it is easy to insert and install, and at the same time, it can play a good limiting function on the mounting plate 41.

[0039] The sealing strip 63 covers the end of the engine front cover 3 close to the ventilation cover plate 1, further achieving a sealing effect.

[0040] By setting the first sealing structure 5 as a connecting strip 51 and a glass sealing strip 52, the first sealing structure 5 can be well installed on the ventilation cover plate 1 through the connecting strip 51, and at the same time, the sealing effect between the ventilation cover plate 1 and the front windshield 2 is improved by the contact sealing between the glass sealing strip 52 and the glass.

[0041] By arranging a steel strip 622 inside the mounting groove 62, the overall strength of the mounting groove 62 can be improved.

[0042] Embodiment: Refer to Figures 4 to 6 As shown, this embodiment is similar in structure to Embodiment 1. The difference is that a sealing groove 331 matching the guiding strip 61 is arranged on the inner side of the engine front cover 3. More specifically, the guiding strip 61 located at the second sealing cavity 612 cooperates with the sealing groove 31. An airbag buffer strip 7 is arranged below the front end of the engine front cover 3. The airbag buffer strip 7 can be arranged on the front bumper of the car, so that after the engine front cover 3 is closed, the engine front cover 3 can compress the airbag buffer strip 7. The airbag buffer strip 7 is connected to the second sealing cavity 612 through an air duct 71. A return spring 72 is arranged inside the airbag buffer strip 7, and the return spring 72 abuts against both sides of the airbag buffer strip 7.

[0043] The working principle of this embodiment is as follows: In actual use, it is found that due to the limited width of the sealing groove 31 and the special structure of the second sealing cavity 612, when the engine front cover 3 is closed, the sealing effect between the sealing groove 31 and the second sealing cavity 612 is not ideal. Although by increasing the gas volume in the second sealing cavity 612, the effect of closely fitting between the second sealing cavity 612 and the sealing groove 31 can be achieved, but due to the limited width of the sealing groove 31, and the second sealing cavity 612 has a large gas volume inside, which causes the width of the second sealing cavity 612 to increase, making the second sealing cavity 612 unable to be well clamped in the sealing groove 31. Therefore, the airbag buffer strip 7 and the air duct 71 are provided. When the engine front cover 3 is opened, the gas volume in the second sealing cavity 612 is small at this time; when the engine front cover 3 is closed, the second sealing cavity 612 can directly be inserted into the sealing groove 3. When the engine front cover 3 is completely closed, the airbag buffer strip 7 is compressed, and the gas inside the compressed airbag buffer strip 7 enters the second sealing cavity 612 through the air duct 71, increasing the gas in the second sealing cavity 612, which makes the second sealing cavity 612 expand and be able to completely fit with the sealing groove 31, improving the sealing performance between the second sealing cavity 612 and the sealing groove 31. At the same time, by setting the airbag buffer strip 7, the impact force when the engine front cover 7 is closed can also be buffered, reducing the noise when the engine front cover 7 is closed. At the same time, in order to enable the airbag buffer strip 7 to be expanded by the restoring force of the engine front cover 3 itself when the engine front cover 3 is opened, a return spring 72 is provided inside the airbag buffer strip 7. By providing the return spring 72 inside the airbag buffer strip 7, when the engine front cover 3 is opened, due to the restoring force of the return spring 72 itself, the airbag buffer strip 7 can be expanded, which makes it possible that when the engine front cover 3 is opened, the airbag buffer strip 7 can automatically recover the gas in the second sealing cavity 612 through the air duct 71, reducing the gas inside the second sealing cavity 612, making the volume of the second sealing cavity 611 decrease so that the second sealing cavity 612 can be separated from the sealing groove 31 after the engine front cover 3 is opened.

[0044] The above-described embodiment is only a preferred solution of the present invention, and does not impose any form of limitation on the present invention. There are other variations and modifications without exceeding the technical solutions described in the claims.

Claims

1. A ventilation cover sealing structure, comprising a ventilation cover, a front windshield, an engine hood and a front cabin cross beam, characterized in that, One end of the ventilation cover plate close to the front windshield is provided with a first sealing structure, and one end of the ventilation cover plate close to the engine hood is provided with a second sealing structure. The second sealing structure includes a guiding strip. One side of the guiding strip close to the engine hood is provided with a first sealing cavity and a second sealing cavity. One side of the guiding strip away from the engine hood is provided with a mounting groove. An installation plate is arranged on the front cabin cross beam, and the installation plate is clamped in the mounting groove. One end of the ventilation cover plate close to the engine hood is attached to the installation plate; A sealing groove matched with the second sealing cavity is arranged on the inner side of the engine hood. An airbag buffer strip is arranged below the front end of the engine hood. The airbag buffer strip is communicated with the second sealing cavity through an air duct. A return spring is arranged inside the airbag buffer strip, and the return spring abuts on both sides of the airbag buffer strip.

2. The ventilation cover plate sealing structure according to claim 1, characterized in that Clamping strips are arranged on the inner side walls on both sides of the mounting groove, and the clamping strips are inclined towards the bottom of the mounting groove.

3. The ventilation cover plate sealing structure according to claim 1, characterized in that, A sealing strip is arranged on one side of the mounting groove close to the ventilation cover plate, and the sealing strip wraps and covers the end of the ventilation cover plate close to the engine hood.

4. The ventilation cover plate sealing structure according to claim 1, characterized in that, The first sealing structure includes a connecting strip and a glass sealing strip. The connecting strip is fixedly arranged at the end of the ventilation cover plate close to the front windshield, and the glass sealing strip is attached and sealed to the front windshield.

5. The ventilation cover plate sealing structure according to claim 4, characterized in that, The material of the glass sealing strip is ethylene propylene diene monomer rubber with a Shore hardness of 60 degrees, and the material of the connecting strip is ethylene propylene diene monomer rubber with a Shore hardness of 80 degrees.

6. The ventilation cover plate sealing structure according to claim 1, characterized in that, A steel belt is arranged inside the side wall of the mounting groove.

7. The ventilation cover plate sealing structure according to any one of claims 1 to 6, characterized in that, The material of the mounting groove is ethylene propylene diene monomer rubber material with a Shore hardness of 60 degrees.

8. The ventilation cover plate sealing structure according to claim 7, characterized in that, The material of the sealing strip is ethylene propylene diene monomer rubber material with a Shore hardness of 60 degrees.

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