Inflatable grommet structure for vehicle cavity wade sealing

Abstract

The utility model relates to an expansion rubber block structure for vehicle cavity wading seal belongs to vehicle cavity seal technical field. Including left side water seal assembly, right side water seal assembly and car body sheet metal, the left side water seal assembly includes left side nylon framework, hot melt adhesive, left side nylon framework and hot melt adhesive become integral through two -color injection molding, right side water seal assembly includes right side nylon framework and foamed material, right side nylon framework and foamed material become integral through two -color injection molding, right side water seal assembly and left side water seal assembly are assembled as an organic whole. Advantages lie in: after installation, the foamed material fills the gap between the car body sheet metal, realizes complete seal filling, makes the sealing property of car body cavity improve greatly, improves whole car water tightness. And simple structure, the development cost is lower, and the practicality is strong.

Description

Technical Field

[0001] This utility model relates to the field of vehicle cavity sealing technology, and in particular to an expansion block structure for sealing vehicle cavities in water. Background Technology

[0002] With rising demands for user experience, the requirements for airtightness are becoming more stringent, and some new models are beginning to require waterproofing. Due to the design characteristics of vehicle body structures, there are cavities in the vehicle body after assembly. The greater the wading depth of a vehicle, the stronger its survivability in extreme weather conditions such as floods and heavy rain, and the better it can protect passenger safety. Furthermore, the market is now demanding the development of amphibious vehicles, which requires vehicles to have excellent watertightness performance, making them safer and more reliable when wading. The cavity sealant structure is a crucial sealing component for ensuring a vehicle doesn't leak water and is safer and more reliable. Ordinary sound insulation cavity sealants consist of a nylon PA (polyamide) skeleton and traditional foaming material EVA (ethylene-vinyl acetate copolymer). After coating and high-temperature baking, the thermally expanded sealing material foams and fills the cavity. However, ordinary soundproof cavity blocks do not meet high water tightness requirements, and thermal expansion sealants cannot effectively fill the sharp corners of sheet metal overlaps, leaving a risk of water ingress. Furthermore, waterproof products on the market are expensive and have long mold-making cycles.

[0003] During vehicle operation, the friction between high-speed airflow and cavities creates vortices within the cavity walls, generating turbulent airflow noise. This turbulent airflow can also cause cavity resonance noise, and the high-speed airflow field easily transmits external noise. Therefore, to reduce noise and improve user experience, it is necessary to block the airflow within the cavities. Current technology typically uses expanded polyurethane (EVA) blocks to fill and seal the cavities in the vehicle body to block airflow. However, with increasing user demands and higher requirements for noise reduction, traditional EVA blocks, due to incomplete filling of gaps after foaming and poor airtightness, cannot completely solve the related noise problems. Summary of the Invention

[0004] The purpose of this invention is to provide an expanding rubber block structure for sealing water-resistant cavities in vehicles, solving the technical problems of existing technologies where the vehicle body cannot be waterproofed, waterproof products are expensive, and the cavity lacks airtightness, resulting in poor sound insulation and noise reduction. This invention is assembled from foamed material and hot melt adhesive, installed vertically, and after foaming, completely seals the cavities of the vehicle body sheet metal, achieving complete sealing and significantly improving the sealing performance of the vehicle body cavities, thus enhancing the overall watertightness of the vehicle.

[0005] The above-mentioned objective of this utility model is achieved through the following technical solution: The expansion block structure for sealing water immersion cavities in vehicles includes a left water seal assembly 1, a right water seal assembly 2, and a body sheet metal 3. The left water seal assembly 1 includes a left nylon skeleton 11 and hot melt adhesive 12, which are integrated by two-color injection molding. The right water seal assembly 2 includes a right nylon skeleton 21 and foam material 22, which are integrated by two-color injection molding.

[0006] The right-side water seal assembly 2 and the left-side water seal assembly 1 are interlocked and connected to each other to form a single unit.

[0007] The expansion block structure is vertically fastened to the slot of the body sheet metal 3 by the buckle 4.

[0008] The beneficial effects of this utility model are as follows: This utility model is assembled from foam material and hot melt adhesive. After vertical installation, the foam material fills the gaps in the body sheet metal, achieving complete sealing and significantly improving the sealing performance of the body cavity, thus enhancing the overall water tightness of the vehicle. Furthermore, it has a simple structure, low development costs, and strong practicality. Attached Figure Description

[0009] The accompanying drawings, which are provided to further illustrate the present invention and form part of this application, illustrate the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0010] Figure 1 This is a cross-sectional structural diagram of the present invention; Figure 2 This is a schematic diagram of the left-side water seal assembly of this utility model; Figure 3 This is a schematic diagram of the right-side water seal assembly of this utility model; Figure 4 This is a cross-sectional view of the present invention after it has been assembled onto the body sheet metal. Figure 5 This is an isometric schematic diagram of the present invention; Figure 6 This is an isometric view of the left-side water seal assembly of this utility model; Figure 7 This is an isometric view of the right-side water seal assembly of this utility model; Figure 8 This is an axonometric view of the present invention after it has been assembled onto the body sheet metal.

[0011] In the diagram: 1. Left water seal assembly; 11. Left nylon skeleton; 12. Hot melt adhesive; 2. Right water seal assembly; 21. Right nylon skeleton; 22. Foam material; 3. Body sheet metal; 4. Clip. Detailed Implementation

[0012] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. To make the above-mentioned objects, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0013] See Figures 1 to 4 As shown, the expansion block structure for sealing water-filled cavities in vehicles according to this utility model is composed of PA66, foam material, and hot melt adhesive. It is vertically installed inside the sheet metal cavity. After sheet metal electrophoresis, the internal foam material expands and compresses the hot melt adhesive to fill the sheet metal cavity, achieving complete sealing. It includes a left water seal assembly 1, a right water seal assembly 2, and a body sheet metal 3. The left water seal assembly 1 includes a left nylon skeleton 11 and hot melt adhesive 12, which are integrated by two-color injection molding. The right water seal assembly 2 includes a right nylon skeleton 21 and foam material 22, which are also integrated by two-color injection molding. The right water seal assembly 2 is snap-fitted to the left water seal assembly 1.

[0014] See Figures 5 to 8 As shown, in actual use, the assembled expanding rubber block structure A is vertically snapped into the slot of the body sheet metal 3 using clips 4. After electrophoresis on the sheet metal, the internal foam material expands and compresses the hot melt adhesive to fill all gaps. This utility model is assembled from foam material and hot melt adhesive, vertically installed on the sheet metal, and fills the gaps in the body sheet metal after electrophoresis foaming, achieving complete sealing and significantly improving the sealing performance of the body cavity, thus enhancing the overall water tightness of the vehicle.

[0015] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made to this utility model should be included within the protection scope of this utility model.

Claims

1. An expansion block structure for sealing water-weather cavities in vehicles, characterized in that: The assembly includes a left water seal assembly (1), a right water seal assembly (2), and a body sheet metal (3). The left water seal assembly (1) includes a left nylon skeleton (11) and hot melt adhesive (12). The left nylon skeleton (11) and hot melt adhesive (12) are integrated by two-color injection molding. The right water seal assembly (2) includes a right nylon skeleton (21) and foam material (22). The right nylon skeleton (21) and foam material (22) are integrated by two-color injection molding.

2. The expansion block structure for sealing water-wetting cavities in vehicles according to claim 1, characterized in that: The right water seal assembly (2) and the left water seal assembly (1) are interlocked to form a single unit.

3. The expansion block structure for sealing water-wetting cavities in vehicles according to claim 1, characterized in that: The expansion block structure is vertically snapped into the slot of the body sheet metal (3) by a buckle (4).

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