Impact resistant vehicle cavity seal structure

Abstract

The utility model relates to vehicle processing technical field, concretely relates to a kind of anti-impact vehicle cavity sealing structure, including framework, the left and right sides of the framework are respectively fixedly installed with soldering piece and buckle, the soldering piece is fixedly welded with sheet metal in the vehicle cavity, the buckle is fixed with sheet metal hole position in the vehicle cavity, bidirectional mechanical anchoring is formed by soldering piece and buckle jointly, the outside of the framework is provided with foaming structure, and gradient sealing body is formed by foaming structure and framework compound formation.Nylon framework side is connected with the sheet metal hole position of one side of cavity by the buckle structure of integrally injection molding, and the other side is fixedly connected by soldering piece and the sheet metal of other side of cavity by welding mode, and bidirectional mechanical anchoring of buckle and welding is formed, ensure that rubber block does not occur any displacement or peeling under the impact of high-pressure water flow, simultaneously, foaming structure is used to form gradient sealing body on the top and key area of framework, and the perfect filling of sheet metal sharp corner is formed.

Description

Technical Field

[0001] This utility model relates to the field of vehicle processing technology, and in particular to an impact-resistant vehicle cavity sealing structure. Background Technology

[0002] In vehicle manufacturing, to prevent water, dust, and noise from entering the passenger compartment through the body sheet metal cavities (such as A / B / C pillars), pre-installed expansion sealing blocks are commonly used. The existing typical structure is: a nylon skeleton is composited with a single-formula foam material (such as EVA), which is connected to the sheet metal on one side by a buckle. It expands when heated during the electrophoretic baking process to fill the cavity and achieve a seal.

[0003] In the prior art, patent CN214001544U discloses a sealing structure for a vehicle cavity. The vehicle cavity is formed by connecting an inner panel and an outer panel. The sealing structure includes a fixing buckle and a limiting frame. One end of the fixing buckle is fixed to the inner panel. The limiting frame includes a base plate and two side plates, which are respectively connected to both sides of the base plate. The base plate and the two side plates form a limiting cavity. A deformable foam is provided on the limiting cavity, and the foam extends out of the limiting cavity. The other end of the fixing buckle is connected to the base plate.

[0004] The above structure adds a limiting skeleton to accommodate the foam. However, in the actual connection between the sealing block and the sheet metal, the filling of complex cavities is not perfect. Irregular structures such as welds and sharp corners often exist inside the sheet metal cavity, resulting in incomplete sealing and water leakage. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose an impact-resistant vehicle cavity sealing structure to solve the problem of water leakage caused by incomplete filling of complex cavities and irregular structures such as welds and sharp corners inside the sheet metal cavity in actual sealing block and sheet metal connection.

[0006] Based on the above objectives, this utility model provides an impact-resistant vehicle cavity sealing structure, including a frame, on which welding plates and buckles are respectively fixedly installed on the left and right sides. The welding plates are welded and fixed to the sheet metal inside the vehicle cavity, and the buckles are fixed to the sheet metal holes inside the vehicle cavity. The welding plates and buckles together form a bidirectional mechanical anchoring. The buckle and the frame are an integral structure made of nylon material through injection molding, and the other two sides of the frame are set as sharp corners. The skeleton is provided with a foam structure on the outside, and the foam structure and the skeleton are combined to form a gradient seal.

[0007] Preferably, the foamed structure includes a first foamed material layer composited on the top of the skeleton, and a second foamed material layer composited on the bottom of the skeleton, with the first foamed material layer covering the pointed corners of the composite foamed material layer and the skeleton.

[0008] Preferably, the activation temperature of the first foamed material layer is lower than the activation temperature of the second foamed material layer.

[0009] Preferably, the welding sheet is either a metal welding sheet or a plastic welding sheet.

[0010] Preferably, the skeleton includes an upper skeleton and a lower skeleton, and the first foam material layer and the second foam material layer are composited between the upper skeleton and the lower skeleton.

[0011] Preferably, the foaming material layer is either polyurethane or polystyrene.

[0012] Preferably, the second foaming material layer is either phenolic foam or silicone foam.

[0013] The beneficial effects of this utility model are: One side of the nylon skeleton is connected to the sheet metal hole on one side of the cavity through an integrally injection-molded snap-fit ​​structure, while the other side is fixed to the sheet metal on the other side of the cavity through welding tabs, forming a two-way mechanical anchoring of snap-fit ​​and welding. This ensures that the rubber block will not shift or peel off under the impact of high-pressure water flow. At the same time, the foam structure forms a gradient seal at the top and key areas of the skeleton, perfectly filling the sharp corners of the sheet metal. Thus, the gradient structure can better adapt to different stress conditions, resulting in a better sealing effect. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall installation structure of this utility model with the vehicle sheet metal. Figure 2 This is a three-dimensional structural diagram of the entire utility model; Figure 3 This is a schematic diagram of the overall planar structure of this utility model; Figure 4 This is an exploded structural diagram of the entire utility model; Figure 5 This is a three-dimensional structural diagram of the second foaming structure of this utility model.

[0016] The markings in the diagram are: 1. Skeleton; 2. Welding sheet; 3. Clip; 4. Foam material layer one; 5. Foam material layer two; 6. Foam structure; 11. Upper skeleton; 12. Lower skeleton. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0018] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, an impact-resistant vehicle cavity sealing structure includes a frame 1. Welding plates 2 and buckles 3 are fixedly installed on the left and right sides of the frame 1, respectively. Welding plates 2 are welded and fixed to the sheet metal inside the vehicle cavity, and buckles 3 are fixed to the sheet metal holes inside the vehicle cavity. The welding plates 2 and buckles 3 together form a bidirectional mechanical anchor. The buckle 3 and the frame 1 are an integral structure made of nylon material through injection molding. The other two sides of the frame 1 are set as sharp corners. The skeleton 1 is provided with a foam structure 6 on its exterior, and the foam structure 6 and the skeleton 1 are combined to form a gradient seal.

[0019] In this embodiment, one side of the nylon skeleton 1 is connected to the sheet metal hole on one side of the cavity through an integrally injection-molded buckle 3 structure, while the other side is fixed to the sheet metal on the other side of the cavity through welding tabs 2, forming a two-way mechanical anchoring of buckle and welding. This ensures that the rubber block will not shift or peel off under the impact of high-pressure water flow. At the same time, the foam structure 6 is used to form a gradient seal on the top and key areas of the skeleton 1, perfectly filling the sharp corners of the sheet metal. Thus, the gradient structure can better adapt to different stress conditions, resulting in a better sealing effect.

[0020] As one implementation method, such as Figure 2 , Figure 3 and Figure 4 As shown, the foam structure 6 includes a foam material layer 4 composited on the top of the skeleton 1, and a foam material layer 5 composited on the bottom of the skeleton 1. The foam material layer 4 wraps around the sharp corner of the composite foam material layer 5 and the skeleton 1.

[0021] Among them, the activation temperature of foam material layer 4 is lower than that of foam material layer 5.

[0022] In this embodiment, foam material layer 1 4 structurally covers foam material layer 2 5 at the sharp corner of the sheet metal. Driven by the expansion of the low-temperature foam material, the foam material layer 1 4, which is not fully activated and has a high viscosity, is precisely guided and pressed into the sharp corners, welds and other complex areas of the sheet metal that are difficult to fill. Subsequently, the furnace temperature continued to rise, and the foaming material layer 4 began to activate and foam. Due to its higher expansion ratio, it underwent "secondary reinforcement foaming" on the basis of the initial filling, and finally formed a gradient density, dead-angle-free sealed body with the bottom supported by low-temperature foaming material and the top and key areas sealed by foaming material layer 4.

[0023] As one implementation method, such as Figure 2 , Figure 3 As shown, the welding piece 2 is one of the metal welding piece and the plastic welding piece.

[0024] In this embodiment, welding sheets 2 of different materials are used for skeletons 1 with different structures, thus making it more adaptable.

[0025] As one implementation method, such as Figure 5 As shown, the skeleton 1 includes an upper skeleton 11 and a lower skeleton 12, with foam material layer 4 and foam material layer 5 composited between the upper skeleton 11 and the lower skeleton 12.

[0026] In this embodiment, foam material layer 4 and foam material layer 5 are composited between the upper skeleton 11 and the lower skeleton 12. The upper skeleton 11 and the lower skeleton 12 form a "frame" structure, which tightly wraps and protects the foam material layer inside, effectively preventing the foam material layer from being damaged or detached from the skeleton due to bumps or scratches. Furthermore, the thickness of the middle foam material layer can be precisely controlled, and its interface and shape are easy to control.

[0027] As one implementation method, such as Figure 3 As shown, the foam material layer 4 is either polyurethane or polystyrene.

[0028] Among them, the foaming material layer 5 is either phenolic foam or silicone foam.

[0029] In this embodiment, the gradient foaming and synergistic flow guiding mechanism of low-temperature materials driving high-temperature materials are used to fill complex cavity structures, especially the sharp corners of sheet metal, thus eliminating the risk of water seepage.

[0030] Working principle: During use, the foam material layer 4 and the foam material layer 5 have different activation temperatures and rheological properties. During the baking process, the low-temperature foam material layer is activated and expands first, quickly sealing and filling the bottom of the cavity, and generating an upward thrust due to its expansion. By covering the foam material layer 2 5 at the sharp corner of the sheet metal with the foam material layer 4, the foam material layer 4, which is not fully activated and has a high viscosity, is precisely guided and pressed into the sharp corner, weld and other complex areas of the sheet metal that are difficult to fill under the expansion of the low temperature foam material. Subsequently, the furnace temperature continued to rise, and the foaming material layer 4 began to be activated and foamed. Due to its higher expansion ratio, it underwent "secondary reinforcement foaming" on the basis of the initial filling, and finally formed a gradient density, dead-angle-free sealed body with the bottom supported by low-temperature foaming material and the top and key areas sealed by foaming material layer 4. Finally, one side of the nylon skeleton 1 is connected to the sheet metal hole on one side of the cavity through an integrally injection-molded buckle 3 structure, while the other side is fixed to the sheet metal on the other side of the cavity through welding through welding piece 2, forming a two-way mechanical anchoring of buckle and welding, which ensures that the rubber block will not be displaced or peeled under the impact of high-pressure water flow, and the sealing effect is better.

[0031] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0032] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An impact-resistant vehicle cavity sealing structure, comprising a frame (1), characterized in that, Welding plates (2) and buckles (3) are fixedly installed on the left and right sides of the frame (1), respectively. The welding plates (2) are welded and fixed to the sheet metal in the vehicle cavity, and the buckles (3) are fixed to the sheet metal holes in the vehicle cavity. The welding plates (2) and buckles (3) together form a two-way mechanical anchor. The buckle (3) and the skeleton (1) are an integral structure made of nylon material by injection molding process. The other two sides of the skeleton (1) are set as sharp corners. The skeleton (1) is provided with a foam structure (6) on the outside, and the foam structure (6) and the skeleton (1) are combined to form a gradient seal.

2. The impact-resistant vehicle cavity sealing structure according to claim 1, characterized in that, The foamed structure (6) includes a foamed material layer 1 (4) on top of the skeleton (1), and a foamed material layer 2 (5) on the bottom of the skeleton (1). The foamed material layer 1 (4) wraps around the pointed end of the foamed material layer 2 (5) and the skeleton (1) after they are combined.

3. The impact-resistant vehicle cavity sealing structure according to claim 2, characterized in that, The activation temperature of the first foam material layer (4) is lower than the activation temperature of the second foam material layer (5).

4. The impact-resistant vehicle cavity sealing structure according to claim 1, characterized in that, The welding sheet (2) is either a metal welding sheet or a plastic welding sheet.

5. The impact-resistant vehicle cavity sealing structure according to claim 2, characterized in that, The skeleton (1) includes an upper skeleton (11) and a lower skeleton (12), and the first foam material layer (4) and the second foam material layer (5) are composited between the upper skeleton (11) and the lower skeleton (12).

6. The impact-resistant vehicle cavity sealing structure according to claim 3, characterized in that, The foam material layer one (4) is either polyurethane or polystyrene.

7. The impact-resistant vehicle cavity sealing structure according to claim 3, characterized in that, The second foaming material layer (5) is either phenolic foam or silicone foam.

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