Waterproof cavity partition with high acoustic performance
Through the combined design of high-fluidity watertight EVA material with the main substrate, EVA foam parts and lower cover, the problem of reduced sound insulation and waterproof performance caused by aging of EVA foam is solved, and high acoustic performance automobile cavity partition is achieved, which improves the sealing and sound insulation effects of new energy vehicles.
Patent Information
- Application Number
- CN202423075460.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-12-13
AI Technical Summary
In the existing technology, EVA foam material forms bubbles of different sizes in the automobile cavity partition, resulting in reduced sound insulation and waterproof performance, and aging with environmental changes, which cannot meet the high acoustic performance requirements of new energy vehicles.
It adopts a combination design of high-fluidity watertight EVA material with the main substrate, EVA foam parts and lower cover. Multiple sealing sections are formed through high-temperature injection molding. Combined with the structure of arc-shaped protrusions, grooves, semi-circular protrusions and protrusion blocks, stable seamless splicing and sealed connection are achieved.
It improves the acoustic and waterproof performance of the car cavity partition, enhances the sealing effect, and improves the overall use effect of new energy vehicles.
Smart Images
Figure CN223370777U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile waterproof cavity partitions, in particular to a waterproof cavity partition with high acoustic performance. Background Art
[0002] With the development of new energy vehicles, people's demand for cars has gradually shifted from basic means of transportation to mobile office spaces, which has put higher requirements on the interior environment of the car, such as quieter noise isolation function in the car, and waterproofing in the car that can adapt to more complex road conditions.
[0003] In the existing technology, some noise isolation inside the car is achieved by filling cavity partitions in the cavity of the white body, and the waterproofing of the car is more often achieved by using PVC coating, welding sealant and other methods. However, in the existing technology, the cavity partition filled in the cavity of the white body is achieved by expanding and sealing the cavity with foamed EVA after high-temperature baking to achieve the effect of sound insulation. However, after foaming, EVA will form bubbles of different sizes, thereby reducing the surface density of the cross-section and reducing the overall sound insulation performance of the partition. At the same time, these bubbles will age with changes in the environment, thereby reducing the waterproof performance. In view of this, we propose a waterproof cavity partition with high acoustic performance. Utility Model Content
[0004] The purpose of the present utility model is to provide a waterproof cavity partition with high acoustic performance to solve the problems raised in the above background technology.
[0005] To achieve the above objectives, the utility model provides the following technical solutions: a waterproof cavity partition with high acoustic performance, comprising a main body substrate, an EVA watertight part fixedly installed on the top of the main body substrate, an EVA foam part fixedly installed on the outer side of the bottom of the main body substrate, a lower cover plate fixedly connected to the bottom of the main body substrate, a side groove is provided on the side wall of the main body substrate, an oblique groove is provided between the side groove and the side wall of the main body substrate, a flange is provided on the bottom outer wall of the main body substrate, a through hole is provided on the upper surface of the flange, a groove is provided at the edge of the outer wall of the main body substrate, an arc-shaped protrusion is provided at the outer wall edge of the EVA watertight part, a square block is provided on the lower surface of the EVA foam part, a semicircular protrusion is provided on the inner surface of the EVA foam part, a protrusion block is fixedly installed on the upper surface of the lower cover plate, a square groove is provided on the lower surface of the lower cover plate, and a buckle is fixedly installed on the surface of the square groove.
[0006] Preferably, the arc-shaped protrusion, groove, semicircular protrusion and protrusion block are arranged on the same vertical line, and the groove includes an upper section and a lower section, the upper section of the groove is adapted to the size of the arc-shaped protrusion, and the lower section of the groove is adapted to the size of the semicircular protrusion. During the assembly and molding process, after the arc-shaped protrusion is formed in the upper section of the groove, it can not only increase the contact area between the EVA watertight part and the main substrate, but also improve the sealing effect of the connection between the EVA watertight part and the main substrate.
[0007] Preferably, a notch adapted to the protruding block is provided inside the semicircular protrusion, so that the protruding block can pass through the notch when the lower cover plate and the EVA foam part are assembled to ensure the stability of the connection between the lower cover plate and the EVA foam part.
[0008] Preferably, the outer diameter of the semicircular protrusion is smaller than the inner diameter of the lower section of the groove, and the lower cover plate is provided with a semicircular arc strip on the outside of the protrusion block, and the difference between the outer diameter of the semicircular protrusion and the inner diameter of the lower section of the groove is equal to the thickness of the semicircular arc strip, so that when the lower cover plate is connected to the EVA foam part, the semicircular arc strip is inserted into the position between the semicircular protrusion and the lower section of the groove, thereby further increasing the effective contact area between the lower cover plate and the EVA foam part when connected.
[0009] Preferably, there are three groups of grooves, and the three groups of grooves are respectively arranged on both sides and ends of the main substrate, and there are three groups of arc-shaped protrusions, semicircular protrusions and protrusion blocks respectively, so that the main substrate, EVA watertight parts and EVA foam parts and the lower cover plate can be stably and seamlessly spliced when they are docked.
[0010] Preferably, the size of the square block is adapted to the size of the square groove, so that the effective contact area of the EVA foam part can be increased when it is heat-formed between the lower cover plate and the main substrate. At the same time, a square hole adapted to the size of the connection between the clip and the lower cover plate is opened inside the square block, so that the clip can extend through the square hole and connect with the external sheet metal part.
[0011] Compared with the prior art, the present invention provides a waterproof cavity partition with high acoustic performance, which has the following beneficial effects:
[0012] 1. This waterproof cavity partition with high acoustic performance is made by arranging foamed EVA between the lower cover and the main substrate, so that it can form a preliminary sealing section after contacting the main body and sheet metal. Then, through high-temperature injection molding of EVA watertight parts, the high-fluidity watertight EVA material, the main substrate and the EVA foam parts form a further sealing section, thereby improving the acoustic performance of the overall section, thereby ensuring the noise reduction and waterproof performance of the car's waterproof cavity partition, and further improving the body use effect of new energy vehicles.
[0013] 2. This waterproof cavity partition with high acoustic performance is equipped with upper and lower sections in the groove, and is adapted to the shapes of the arc-shaped protrusion, semicircular protrusion and protrusion block respectively. When the main substrate, EVA watertight part 2, EVA foam part and lower cover plate are docked, stable and seamless splicing can be achieved, thereby providing the most basic sound insulation and waterproof partition for the waterproof cavity of the car. At the same time, it also facilitates the molding and sealing effect of high-fluidity watertight EVA material between the main substrate and the sheet metal under high temperature, thereby improving the overall performance of the partition device. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;
[0015] Figure 2 This is an explosion diagram of the utility model;
[0016] Figure 3 This is a schematic diagram of the main substrate structure of the utility model;
[0017] Figure 4 This is a schematic diagram of the lower cover structure of the utility model.
[0018] In the figure: 1. Main base plate; 11. Side groove; 12. Bevel groove; 13. Flange; 14. Through hole; 15. Groove; 2. EVA watertight part; 21. Arc-shaped protrusion; 3. EVA foam part; 31. Square block; 32. Semicircular protrusion; 4. Lower cover; 41. Protrusion block; 42. Square groove; 43. Buckle. DETAILED DESCRIPTION
[0019] like Figures 1-4 As shown, the utility model provides a technical solution: a waterproof cavity partition with high acoustic performance, comprising a main body substrate 1, an EVA watertight part 2 is fixedly installed on the top of the main body substrate 1, an EVA foam part 3 is fixedly installed on the outer side of the bottom of the main body substrate 1, and a lower cover plate 4 is fixedly connected to the bottom of the main body substrate 1. A side groove 11 is provided on the side wall of the main body substrate 1, and an inclined groove 12 is provided between the side groove 11 and the side wall of the main body substrate 1. A flange 13 is provided on the outer wall of the bottom of the main body substrate 1, and a through hole 14 is provided on the upper surface of the flange 13. A groove 15 is provided at the outer wall edge of the main body substrate 1, an arc-shaped protrusion 21 is provided at the outer wall edge of the EVA watertight part 2, a square block 31 is provided on the lower surface of the EVA foam part 3, and a semicircular protrusion 32 is provided on the inner surface of the EVA foam part 3. A protrusion block 41 is fixedly installed on the upper surface of the lower cover plate 4, a square groove 42 is provided on the lower surface of the lower cover plate 4, and a buckle 43 is fixedly installed on the surface of the square groove 42.
[0020] In one embodiment of the present invention, the main substrate 1 plays the role of the main body support, provides support for the entire cavity partition, and provides a basic position for the installation of other components. At the same time, the EVA foam part 3 is formed by high-temperature foaming, and forms a ring structure on the bottom outside of the main substrate 1 after contacting the sheet metal. Due to the molding method of the EVA foam part 3, it can ensure that the sealing section of the cavity partition at the bottom outer edge of the main substrate 1 has a sound insulation effect. In addition, the EVA watertight part 2 is injection-molded on the surface of the main substrate 1 using a high-fluidity watertight EVA material. During the injection molding process of the EVA watertight part 2, the high-fluidity molten state The high-fluidity watertight EVA material enters the gap between the side groove 11 and the main substrate 1, and flows onto the EVA foam part 3 through the setting and guidance of the inclined groove 12, and is evenly distributed between the EVA foam part 3 installed on the outer side of the bottom of the main substrate 1, thereby realizing a sealed connection between the main substrate 1, the EVA watertight part 2 and the EVA foam part 3, and through the setting of the side groove 11 and the inclined groove 12, the high-fluidity watertight EVA material of the EVA watertight part 2 can flow and be distributed more evenly when heated, so that the device forms a second sealing section through the main substrate 1 after contacting the sheet metal, thereby enhancing the sound insulation and watertightness.
[0021] In addition, the arc-shaped protrusion 21, the groove 15, the semicircular protrusion 32 and the protrusion block 41 are arranged on the same vertical line, and the groove 15 includes an upper section and a lower section. The upper section of the groove 15 is adapted to the size of the arc-shaped protrusion 21, and the lower section of the groove 15 is adapted to the size of the semicircular protrusion 32. During the assembly process, the arc-shaped protrusion 21 is formed in the upper section of the groove 15. It can not only increase the contact area between the EVA watertight part 2 and the main substrate 1, ensuring the relative stability between the two during assembly, but also improve the sealing effect of the connection between the EVA watertight part 2 and the main substrate 1. Furthermore, a notch adapted to the protrusion block 41 is opened inside the semicircular protrusion 32 to facilitate the lower cover. When the lower cover 4 is assembled with the EVA foam part 3, the protruding block 41 can pass through the notch to ensure the stability of the connection between the lower cover 4 and the EVA foam part 3. Specifically, the outer diameter of the semicircular protrusion 32 is smaller than the inner diameter of the lower section of the groove 15. At the same time, the lower cover 4 is provided with a semicircular arc strip on the outer side of the protruding block 41, and the difference between the outer diameter of the semicircular protrusion 32 and the inner diameter of the lower section of the groove 15 is equal to the thickness of the semicircular arc strip. When the lower cover 4 is connected to the EVA foam part 3, the semicircular arc strip is inserted into the position between the semicircular protrusion 32 and the lower section of the groove 15, thereby further increasing the effective contact area between the lower cover 4 and the EVA foam part 3 when connected, so as to ensure the positioning and stability of the lower cover 4 under the EVA foam part 3.
[0022] In an embodiment of the present utility model, there are three groups of grooves 15, and the three groups of grooves 15 are respectively arranged on both sides and ends of the main substrate 1, and three groups of arc-shaped protrusions 21, semicircular protrusions 32 and protrusion blocks 41 are correspondingly provided, so that the main substrate 1, the EVA watertight part 2 and the EVA foam part 3 and the lower cover plate 4 can be stably and seamlessly spliced when docking, and the stability of the above structure after splicing can be guaranteed. At the same time, the size of the square block 31 is adapted to the size of the square groove 42, so that the effective contact area of the EVA foam part 3 can be increased when heat-molded between the lower cover plate 4 and the main substrate 1. At the same time, a square hole adapted to the size of the connection between the buckle 43 and the lower cover plate 4 is opened inside the square block 31, so that the buckle 43 can extend through the square hole and connect with the external sheet metal, so as to facilitate the installation of the entire waterproof cavity partition between the automobile structure.
[0023] In the present invention, the foaming material is first foamed at high temperature and then brought into contact with the sheet metal to form an EVA foam part 3 that is adapted to the connection between the lower cover plate 4 and the main substrate 1. Then, the protrusion block 41 on the lower cover plate 4 is passed through the through hole 14 and the notch that is adapted to the size of the protrusion block 41 opened at the center of the semicircular protrusion 32 to splice and install the lower cover plate 4, the main substrate 1 and the EVA foam part 3. Then, the combination of the lower cover plate 4, the main substrate 1 and the EVA foam part 3 is installed on the automobile sheet metal through the buckle 43. Then, the molten high-fluidity watertight EVA foam part 3 is injected into the body. The VA material is covered on the main substrate 1 and the EVA foam part 3, so that the high-fluidity watertight EVA material of the EVA watertight part 2 enters the gap between the side groove 11 and the main substrate 1, and flows toward the EVA foam part 3 through the setting and guidance of the inclined groove 12, and is evenly distributed between the EVA foam part 3 installed on the outside of the bottom of the main substrate 1, thereby realizing a sealed connection between the main substrate 1, the EVA watertight part 2 and the EVA foam part 3, so that after the device contacts the sheet metal, a second sealing section is formed through the main substrate 1, thereby enhancing the sound insulation and watertightness.
[0024] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.
Claims
1. A waterproof cavity partition with high acoustic performance, comprising a main substrate (1), characterized in that: An EVA watertight component (2) is fixedly mounted on the top of the main substrate (1), an EVA foam component (3) is fixedly mounted on the outer side of the bottom of the main substrate (1), a lower cover (4) is fixedly connected to the bottom of the main substrate (1), a side groove (11) is provided on the side wall of the main substrate (1), an inclined groove (12) is provided between the side groove (11) and the side wall of the main substrate (1), a flange (13) is provided on the outer wall of the bottom of the main substrate (1), and a through hole (14) is provided on the upper surface of the flange (13). A groove (15) is provided at the outer wall edge of the main substrate (1), an arc-shaped protrusion (21) is provided at the outer wall edge of the EVA watertight component (2), a square block (31) is provided on the lower surface of the EVA foam component (3), a semicircular protrusion (32) is provided on the inner surface of the EVA foam component (3), a protrusion block (41) is fixedly mounted on the upper surface of the lower cover plate (4), a square groove (42) is provided on the lower surface of the lower cover plate (4), and a buckle (43) is fixedly mounted on the surface of the square groove (42).
2. A waterproof cavity partition with high acoustic performance according to claim 1, characterized in that: The arc-shaped protrusion (21), the groove (15), the semicircular protrusion (32) and the protruding block (41) are arranged on the same vertical line, and the groove (15) includes an upper section and a lower section, the upper section of the groove (15) is adapted to the size of the arc-shaped protrusion (21), and the lower section of the groove (15) is adapted to the size of the semicircular protrusion (32).
3. The waterproof cavity partition with high acoustic performance according to claim 2, characterized in that: A notch adapted to the protruding block (41) is provided inside the semicircular protrusion (32).
4. The waterproof cavity partition with high acoustic performance according to claim 3, characterized in that: The outer diameter of the semicircular protrusion (32) is smaller than the inner diameter of the lower section of the groove (15); the lower cover plate (4) is provided with a semicircular arc strip on the outer side of the protrusion block (41); and the difference between the outer diameter of the semicircular protrusion (32) and the inner diameter of the lower section of the groove (15) is equal to the thickness of the semicircular arc strip.
5. The waterproof cavity partition with high acoustic performance according to claim 4, characterized in that: The number of the grooves (15) is set to three groups, and the three groups of grooves (15) are respectively arranged on both sides and the end of the main substrate (1), and the arc-shaped protrusions (21), semicircular protrusions (32) and protrusion blocks (41) are correspondingly arranged in three groups.
6. The waterproof cavity partition with high acoustic performance according to claim 5, characterized in that: The size of the square block (31) matches that of the square groove (42), and a square hole matching the size of the connection between the buckle (43) and the lower cover plate (4) is provided inside the square block (31).