Sealing strip structure of engine cover and vehicle body thereof

Abstract

The invention belongs to the technical field of automobile sealing, and particularly provides a sealing strip structure of an engine cover and an automobile body thereof, and the sealing strip structure of the engine cover comprises a base and a bubble pipe; the base is mounted on an inner plate of an engine cover; a semi-annular structure is arranged at the front end of the base towards the cavity of the engine cover; the bubble pipe is arranged at the bottom of the front end of the base, and the bubble pipe and the front end of the base define a full-ring-shaped structure. The overall structure is simple and flexible, the section structure is simplified, the extrusion reject ratio is reduced, extrusion deformation of the bubble pipe is prevented from being affected while the overall supporting performance is guaranteed, the probability that the bubble pipe droops is reduced, a cavity of the engine cover can be fully filled, the restraining effect on narrow-slit type wind whistles is maintained, the replacement frequency of parts is reduced, and the manufacturing cost is reduced. Time and labor are saved, and the assembling effect and the assembling efficiency are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile sealing, and in particular relates to a sealing strip structure of an engine cover and a vehicle body thereof. Background Art

[0002] With the rapid development of the automotive industry, the user experience of cars is becoming increasingly important. Significantly improving a car's drag coefficient can greatly enhance its driving performance. Existing car hoods generally adopt a "sky-covering-ground" design, where the front end of the hood protrudes over the front grille to significantly increase the car's drag coefficient. However, this structural design produces a narrow slit-like wind whistle sound while the car is in motion, which to some extent reduces the user experience for the driver and passengers. Therefore, reducing or even eliminating the narrow slit-like wind whistle sound produced while the car is in motion is key to improving the user experience.

[0003] Existing automobile bodies generally fill the hood cavity by installing a sealing strip on the inner panel of the hood, thereby significantly reducing the size of the hood cavity, or by designing the sealing strip in a segmented manner so that the airflow during driving can directly pass through the front end of the hood, thereby eliminating the hood cavity. However, after long-term use, the above-mentioned sealing strip is very likely to experience sagging of the bubble tube, and the bubble tube is difficult to fully squeeze out, thereby affecting the sealing strip's filling effect on the hood cavity, resulting in a gap between the sealing strip and the hood cavity. Alternatively, it will also affect the segmented sealing strip's ability to guide the airflow during driving, making it impossible to suppress the generation of narrow slit-type wind whistling. If the suppression effect of narrow slit-type wind whistling is to be maintained, the only way is to increase the frequency of sealing strip replacement, which is time-consuming and labor-intensive. At the same time, in order to ensure the use effect, the segmented sealing strip also makes high requirements for the assembly effect, making it difficult to ensure the assembly effect and assembly efficiency. Summary of the Invention

[0004] In view of the above problems, the present invention proposes a sealing strip structure for an engine cover, comprising: a base, mounted on the inner panel of the engine cover; A semi-annular structure is provided at the front end of the base toward the cavity of the engine cover; The bubble tube is arranged at the bottom of the front end of the base, and the bubble tube and the front end of the base are combined to form a full ring structure.

[0005] In some specific embodiments of the present invention, a cantilever is provided at the rear end of the base; The cantilever is provided with a buckle, and one side of the buckle is detachably connected to the inner plate of the engine cover; The base is hung on the inner plate of the engine cover through the buckle.

[0006] In some specific embodiments of the present invention, a protruding structure is provided at the rear end of the cantilever toward the inner plate of the engine cover; When the engine cover is closed, the inner plate of the engine cover is pressed against the protruding structure to drive the front end of the base to be pressed into the cavity of the engine cover.

[0007] In some specific embodiments of the present invention, the cantilever is arranged in surface contact with the inner panel of the engine cover.

[0008] In some specific embodiments of the present invention, the shape and size of the outer peripheral surface of the front end of the base are adapted to the shape and size of the inner wall of the cavity of the engine cover.

[0009] In some specific embodiments of the present invention, the base is made of hard rubber material; The material of the bubble tube is flexible rubber material.

[0010] In some specific embodiments of the present invention, when the front end of the base is pressed into the cavity of the engine cover, the bending amplitude of the front end of the base ranges from 10 degrees to 14 degrees; When the bubble tube is compressed, the pre-compression amount of the bubble tube is at least 2 mm.

[0011] In some specific embodiments of the present invention, the length of the cantilever is at most 20 mm, and the angle dimension of the bend of the base is at least 400 mm.

[0012] In some specific embodiments of the present invention, when the length of the cantilever is greater than or equal to 20 mm, or the angle dimension of the bend of the base is less than or equal to 400 mm, a V-shaped groove is punched out at the bend of the base.

[0013] A vehicle body based on the same concept includes: a sealing strip structure of an engine cover as described in any of the above specific embodiments.

[0014] Compared to the prior art, the engine hood sealing strip structure of the present invention has at least the following advantages: The base and the bubble tube serve as the main structure, making the overall design simple and flexible, simplifying its cross-sectional structure, and thus reducing the extrusion defect rate. Furthermore, the front end of the base is positioned toward the cavity of the engine hood, and the bubble tube, disposed at the bottom of the front end of the base, encloses the front end of the base to form a fully annular structure. While ensuring overall support performance, this prevents the bubble tube from being affected by extrusion deformation, thereby reducing the chance of the bubble tube sagging and achieving full filling of the engine hood cavity to maintain the suppression effect on narrow slit-type wind whistling noise, reducing the frequency of component replacement, and saving time and effort. Furthermore, the base and bubble tube are both integrally designed, eliminating the need for segmented processing, thereby improving assembly quality and efficiency.

[0015] The vehicle body of the present invention includes the sealing strip structure of the engine cover described above, so it has the same beneficial effects as the sealing strip structure of the engine cover described above, and therefore, it will not be described in detail here.

[0016] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic cross-sectional view of the assembly of a sealing strip structure of an engine cover according to an embodiment of the present invention is shown; Figure 2 A schematic cross-sectional view of a sealing strip structure of an engine cover according to an embodiment of the present invention is shown; Figure 3 A schematic top view of the sealing strip structure of the engine cover in an embodiment of the present invention is shown; Figure 4 for Figure 3 A partial enlarged view of some locations; Figure 5 for Figure 3 a partial enlarged view of another position of Figure 6 A cross-sectional schematic diagram of the sealing strip structure of the engine cover in an embodiment of the present invention is shown.

[0019] In the figure, 100, base; 110, buckle; 120, raised structure; 200, bubble tube; 300, engine cover; 400, front grille. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0021] Reference Figure 1 An embodiment of the present invention provides a sealing strip structure for an engine cover, comprising a base 100 and a bubble tube 200. The base 100 is mounted on the inner panel of the engine cover 300. A semi-annular structure is provided at the front end of the base 100, facing the cavity of the engine cover 300. The bubble tube 200 is disposed at the bottom of the front end of the base 100, and the bubble tube 200 and the front end of the base 100 together form a full annular structure.

[0022] Specifically, the base 100 is mounted on the inner plate of the engine cover 300, with the front end of the base 100 extending outward from the engine cover 300 and facing the cavity of the engine cover 300. The front end of the base 100 has a semi-arc-shaped structure. The bubble tube 200 is located at the front end of the base 100, and its two sides are connected to the two sides of the front end of the base 100. The bubble tube 200 also has a semi-arc-shaped structure, thereby forming a full ring structure with the bubble tube 200 and the front end of the base 100. When the engine cover 300 is closed, the front end of the base 100 and the bubble tube 200 will be exactly located between the cavity of the engine cover 300 and the front grille 400. The front end of the semi-arc structure of the base 100 will fill the cavity of the engine cover 300, and the bubble tube 200 will be squeezed and interfered with the front grille 400, so that the bubble tube 200 is squeezed from the semi-arc structure and deformed into a flat structure, thereby achieving a sealing effect.

[0023] The main structure formed by the base 100 and the bubble tube 200 makes the overall design of the sealing strip structure of the engine cover simple and flexible, simplifies its cross-sectional structure, and thus reduces the extrusion defect rate of the bubble tube 200. In addition, the front end of the base 100 is arranged toward the cavity of the engine cover 300, thereby increasing the setting length of the base 100, and the bubble tube 200 arranged at the bottom of the front end of the base 100 can be combined with the front end of the base 100 to form a full annular structure. While ensuring the overall supporting performance of the sealing strip structure of the engine cover, it also avoids the deformation caused by the squeezing interference between the bubble tube 200 and the front grille 400, thereby reducing the probability of the bubble tube 200 sagging, and achieving sufficient filling of the cavity of the engine cover 300 to maintain the suppression effect on the narrow slit type wind whistle, reducing the replacement frequency of the sealing strip structure of the engine cover, and saving time and effort. At the same time, the base 100 itself, the bubble tube 200 itself, and the base 100 and the bubble tube 200 are all designed as an integrated whole, so there is no need to segment the arrangement of the base 100 and the bubble tube 200, thereby improving the assembly effect and efficiency of the sealing strip structure of the engine cover.

[0024] In some specific embodiments of the present invention, referring to Figure 1 The rear end of the base 100 is provided with a cantilever. A buckle 110 is provided on the cantilever, and one side of the buckle 110 is detachably connected to the inner plate of the engine cover 300. The base 100 is hung on the inner plate of the engine cover 300 through the buckle 110.

[0025] Specifically, the rear end of the base 100 extends away from the front grille 400, forming a cantilever. A clip 110 is disposed on the cantilever and engages with it. One side of the clip 110 also engages with the inner panel of the hood 300, allowing the base 100 to be suspended from the inner panel of the hood 300 via the clip 110. By engaging the clip 110 with the cantilever and the inner panel of the hood 300, respectively, a detachable connection between the base 100 and the inner panel of the hood 300 is achieved, facilitating installation and removal.

[0026] It should be noted that, referring to Figure 3 There are multiple buckles 110, and the multiple buckles 110 are evenly arranged horizontally along the width direction of the cantilever. Among them, the multiple buckles 110 located at the straight section of the cantilever are spaced apart, and the spacing between each adjacent two buckles 110 ranges from 100 mm to 120 mm. Figure 4The distance between each adjacent two clips 110 at the straight section of the cantilever is 109 mm, which can ensure the stability of the installation while avoiding the impact of too many clips 110 on the assembly efficiency. At the same time, due to the curvature of the front end of the car body, some parts of the cantilever need to be bent, and the multiple clips 110 at the bend of the cantilever are also spaced apart. The distance between each adjacent two clips 110 ranges from 60 mm to 90 mm. Figure 5 The distance between each two adjacent buckles 110 at the bend of the cantilever is 69 mm or 64 mm, which can ensure the stability of the installation while avoiding the impact of excessive number of buckles 110 on assembly efficiency.

[0027] Among them, a plurality of through holes are opened on the cantilever, and the plurality of through holes are uniformly opened horizontally along the width direction of the cantilever, and the plurality of through holes are arranged in a one-to-one correspondence with the plurality of clips 110. One side of the clip 110 is passed through the corresponding through hole and is clipped with the inner plate of the engine cover 300. The spacious size of the other side of the clip 110 is larger than the width size of the corresponding through hole, so that the clip 110 and the corresponding through hole can be clipped.

[0028] In some specific embodiments of the present invention, referring to Figure 2 The rear end of the cantilever is provided with a protruding structure 120 toward the inner plate of the engine cover 300. When the engine cover 300 is closed, the inner plate of the engine cover 300 is pressed against the protruding structure 120 to drive the front end of the base 100 to be pressed into the cavity of the engine cover 300.

[0029] Specifically, the buckle 110 is located near the middle of the cantilever, and a protruding structure 120 is provided at one end of the cantilever away from the front grille 400 , and the protruding structure 120 is arranged toward the inner plate of the engine cover 300 . When the engine hood 300 is closed, as the engine hood 300 is pressed down, the inner plate of the engine hood 300 can first abut against the raised structure 120, and as the engine hood 300 is fully closed, the engine hood 300 can continue to be pressed down, so that the inner plate of the engine hood 300 continues to squeeze the raised structure 120 downward, thereby indirectly realizing the downward pressure setting of the end of the cantilever away from the front grille 400, so as to drive the end of the cantilever away from the front grille 400 away from the inner plate of the engine hood 300, and then under the suspending action of the buckle 110 on the cantilever, the lever structure formed by the buckle 110 and the cantilever can drive the end of the cantilever close to the front grille 400 to move upward, so as to drive the front end of the base 100 of the semi-arc structure close to the cavity of the engine hood 300 until the front end of the base 100 is completely filled in the cavity of the engine hood 300. This not only facilitates filling the cavity of the engine cover 300 but also further improves the support performance of the front end of the base 100, thereby preventing sagging of the bubble tube 200. The provision of the protruding structure 120 ensures that the front end of the base 100 has sufficient support performance, thereby ensuring that the cavity of the engine cover 300 can be filled effectively even after the original support lip structure is removed. Furthermore, since no support lip structure is required, the amount of raw materials required to manufacture the engine cover sealing strip structure can be reduced. Compared with the original solution, the engine cover sealing strip structure can reduce the amount of raw materials used by at least 10%.

[0030] Further, refer to Figure 6 The buckle 110 is arranged at one-third of the cantilever, that is, the ratio of the distance between the protruding structure 120 and the buckle 110 to the distance between the buckle 110 and the front end of the semi-arc structure base 100 is 1:2.

[0031] In some specific embodiments of the present invention, referring to Figure 6, the cantilever is arranged in surface contact with the inner plate of the engine cover 300. Specifically, when the engine cover 300 is opened, the side of the cantilever of the base 100 close to the inner plate of the engine cover 300 is completely abutted against the inner plate of the engine cover 300, thereby reducing the exposure of the base 100, reducing the corrosion area of the base 100, and improving the service life. At the same time, because the side of the cantilever close to the inner plate of the engine cover 300 is completely abutted against the inner plate of the engine cover 300, this part of the cantilever cannot be exposed. Therefore, there is no need to spray water-based paint on the part of the cantilever that is in surface contact with the inner plate of the engine cover 300, thereby greatly reducing the area of spraying water-based paint, which is convenient for production. Among them, the area of the base 100 sprayed with water-based paint per square meter can be reduced from at least 27,000 square millimeters to 17,000 square millimeters compared with the area of the existing sealing strip sprayed with water-based paint, which is equivalent to reducing the spraying cost of water-based paint by at least 37%.

[0032] In some specific embodiments of the present invention, referring to Figure 6 The shape and size of the outer circumference of the front end of the base 100 match the shape and size of the inner wall of the cavity of the engine cover 300. Specifically, the curvature of the outer circumference of the front end of the base 100 is consistent with the curvature of the cavity of the engine cover 300. When the front end of the base 100 approaches the cavity of the engine cover 300 until the front end of the base 100 is completely filled in the cavity of the engine cover 300, the outer circumference of the front end of the base 100 can completely fit with the inner wall of the cavity of the engine cover 300, thereby further avoiding the existence of gaps in the cavity of the engine cover 300 and preventing the generation of narrow slit-type wind whistling sounds.

[0033] In some specific embodiments of the present invention, the base 100 is made of a hard rubber material. The bubble tube 200 is made of a flexible rubber material. Specifically, the base 100 is made of a hard rubber material with a Shore A of 70±5, thereby further improving the support performance of the base 100 and the front end of the base 100 and preventing the bubble tube 200 from sagging. The flexible rubber material of the bubble tube 200 facilitates the compression deformation of the bubble tube 200 when the engine cover 300 is closed, thereby reducing the compression caused by the deformation of the bubble tube 200 and preventing the engine cover 300 from being difficult to close.

[0034] Furthermore, the hard rubber material is EPDM rubber, and its Shore hardness is 70±5 Shore A. The thickness of the base 100 is 1.9 mm to 2.1 mm, so as to ensure that the base 100 has sufficient supporting performance.

[0035] Furthermore, the flexible rubber material is a closed-cell foam rubber material with a density of 0.55 g / cm3 to 0.75 g / cm3.

[0036] Furthermore, the hard rubber material and the flexible rubber material are combined with each other and molded separately through a composite extrusion process, thereby forming an integrated base 100 and bubble tube 200 .

[0037] In some specific embodiments of the present invention, referring to Figure 6 When the front end of the base 100 is pressed into the cavity of the engine cover 300, the bending amplitude of the front end of the base 100 ranges from 10 degrees to 14 degrees. When the bubble tube 200 is under pressure, the pre-compression amount of the bubble tube 200 is at least 2 mm. Specifically, when the engine cover 300 is fully closed, the front end of the base 100 will bend in the direction close to the cavity of the engine cover 300 under the action of squeezing, with the cantilever as the reference point, and the bending amplitude of the front end of the base 100 ranges from 10 degrees to 14 degrees, to ensure that the front end of the base 100 can fully fill the cavity of the engine cover 300 and avoid the generation of gaps. At the same time, when the engine cover 300 is fully closed, the bubble tube 200 will be compressed toward the inside of the bubble tube 200 under the action of squeezing, and the pre-compression amount of the bubble tube 200 is at least 2 mm to avoid the engine cover 300 being difficult to close.

[0038] In some specific embodiments of the present invention, referring to Figure 3 , the cantilever length is at most 20 mm, and the angle dimension of the base 100 at the bend is at least 400 mm. Specifically, when the cantilever length is less than 20 mm and the angle dimension of the base 100 at the bend is greater than 400 mm, the base 100 can be directly mounted on the inner panel of the hood 300 without cutting or other processing at the bend, facilitating installation, improving the adaptability of the hood sealing strip structure to various vehicle sizes, and reducing usage costs.

[0039] In some specific embodiments of the present invention, referring to Figure 3When the length of the cantilever is greater than or equal to 20 mm, or the angle dimension of the bend of the base 100 is less than or equal to 400 mm, a V-shaped groove is punched out at the bend of the base 100. Specifically, when the length of the cantilever is greater than or equal to 20 mm, or the angle dimension of the bend of the base 100 is less than or equal to 400 mm, it is necessary to perform cutting and other processing on the bend of the base 100, and punch out a V-shaped groove at the bend of the base 100. The V-shaped groove is used to allow the base 100 to perform the bend processing, thereby ensuring the assembly effect of the base 100. However, according to the above structure and material, only one or two V-shaped grooves need to be provided at the bend of the base 100 to meet the bend requirements of the base 100, facilitate processing and installation, and still improve the adaptability of the sealing strip structure of the engine cover to various types and sizes of vehicle bodies, thereby reducing the cost of use.

[0040] An embodiment of the present invention further provides a vehicle body, comprising: a sealing strip structure for an engine hood as described in any of the above-mentioned specific embodiments. The base 100 and the bubble tube 200 of the sealing strip structure for the engine hood serve as the main structure, making the overall design simple and flexible, simplifying its cross-sectional structure, and thus reducing the extrusion defect rate. Furthermore, the front end of the base 100 is disposed toward the cavity of the engine hood 300, and the bubble tube 200, disposed at the bottom of the front end of the base 100, forms a full annular structure with the front end of the base 100. While ensuring overall support performance, this prevents the bubble tube 200 from being squeezed and deformed, thereby reducing the chance of the bubble tube 200 sagging, fully filling the cavity of the engine hood 300, maintaining the suppression effect on narrow-slit wind whistling noise, reducing the frequency of component replacement, and saving time and effort. Furthermore, the base 100 and the bubble tube 200 are both integrally designed, eliminating the need for segmented processing, improving assembly quality and efficiency.

[0041] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing strip structure for an engine cover, characterized in that: include: A base (100) is mounted on an inner plate of an engine cover (300); A semi-annular structure is provided at the front end of the base (100) toward the cavity of the engine cover (300); The bubble tube (200) is arranged at the bottom of the front end of the base (100), and the bubble tube (200) and the front end of the base (100) are combined to form a full ring structure.

2. The sealing strip structure of the engine cover according to claim 1, characterized in that: The rear end of the base (100) is provided with a cantilever; A buckle (110) is provided on the cantilever, and one side of the buckle (110) is detachably connected to the inner plate of the engine cover (300); The base (100) is hung on the inner plate of the engine cover (300) via the buckle (110).

3. The sealing strip structure of the engine cover according to claim 2, characterized in that: A protruding structure (120) is provided at the rear end of the cantilever toward the inner plate of the engine cover (300); When the engine cover (300) is closed, the inner plate of the engine cover (300) is pressed against the protruding structure (120) to drive the front end of the base (100) to be pressed into the cavity of the engine cover (300).

4. The sealing strip structure of the engine cover according to claim 2, characterized in that: The cantilever is arranged in surface contact with the inner plate of the engine cover (300).

5. The sealing strip structure of the engine cover according to claim 1, characterized in that: The shape and size of the outer peripheral surface of the front end of the base (100) are adapted to the shape and size of the inner wall of the cavity of the engine cover (300).

6. The sealing strip structure of the engine cover according to claim 1, characterized in that: The base (100) is made of hard rubber material; The material of the bubble tube (200) is a flexible rubber material.

7. The sealing strip structure of the engine cover according to claim 1, characterized in that: When the front end of the base (100) is pressed into the cavity of the engine cover (300), the bending amplitude of the front end of the base (100) ranges from 10 degrees to 14 degrees; When the bubble tube (200) is compressed, the pre-compression amount of the bubble tube (200) is at least 2 mm.

8. The sealing strip structure of the engine cover according to claim 2, characterized in that: The length dimension of the cantilever is at most 20 mm, and the angle dimension of the bend of the base (100) is at least 400 mm.

9. The sealing strip structure of the engine cover according to claim 2, characterized in that: When the length of the cantilever is greater than or equal to 20 mm, or the angle dimension of the bend of the base (100) is less than or equal to 400 mm, a V-shaped groove is punched and provided at the bend of the base (100).

10. A vehicle body, characterized in that: include: The sealing strip structure of the engine cover according to any one of claims 1 to 9.

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