Seals and Vehicles

Abstract

This application discloses a sealing element and a vehicle, belonging to the field of vehicle technology. The sealing element includes a main body and a heat-fused component. The main body includes a connected pressing portion and a hook portion, with a retaining area formed between the hook portion and the pressing portion. The retaining area is used to retain the portion of a target part located around the hole to be sealed. The heat-fused component wraps around the circumferential portion of the main body. When heated, the heat-fused component changes from a first form to a second form to bond the pressing portion and the target part together, thereby sealing the hole to be sealed. Using the technical solution of this application, the sealing performance of the sealing element can be improved.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a seal and a vehicle. Background Technology

[0002] During the manufacturing process, openings are incorporated into the vehicle body to meet requirements such as lightweighting, welding, and painting. These openings must be sealed with sealant to prevent moisture, dust, and air from entering, thereby protecting the vehicle's NVH (Noise, Vibration, and Harshness) performance and improving ride comfort.

[0003] In related technologies, the seal is a one-piece molded structure made of rubber, with the surface of the seal rigidly abutting against the surface surrounding the hole to achieve a seal. However, this type of seal is prone to deformation, which can prevent the hole from being sealed tightly, leading to seal failure. Summary of the Invention

[0004] In view of this, this application provides a sealing element and a vehicle that can improve the sealing performance of the sealing element.

[0005] On the one hand, embodiments of this application provide a sealing element, which includes a main body and a heat-fused component;

[0006] The main body includes a pressing part and a hook part connected together. A holding area is formed between the hook part and the pressing part. A portion of the hook part extends into the hole to be sealed in the target part. The holding area is used to hold the portion of the target part located around the hole to be sealed.

[0007] The hot melt component encloses the circumferential portion of the main body component;

[0008] When the hot melt component is heated, it changes from a first form to a second form to bond the pressing part and the target part together to seal the hole to be sealed.

[0009] Optionally, the pressing part includes a body part and an extension part;

[0010] One side of the extension is circumferentially connected to the main body, and the other side extends away from the main body.

[0011] The extension has a plurality of through holes, which are evenly distributed along the circumference of the extension, and the through holes are used to accommodate a portion of the hot melt component;

[0012] The hot melt component encloses the extension and the portion of the body adjacent to the extension.

[0013] Optionally, the pressing part includes a first surface and a second surface facing away from each other, the second surface is connected to the hook part, and the second surface is connected with a plurality of protrusions, the plurality of protrusions being evenly distributed along the circumference of the second surface and located inside the plurality of through holes;

[0014] The target component includes a third surface and a fourth surface facing away from each other. The third surface faces the second surface, and the fourth surface faces away from the second surface. When the portion of the target component located around the hole to be sealed is within the holding area, the protrusion is adapted to abut against the third surface, and the end of the hook portion is adapted to abut against the fourth surface.

[0015] Optionally, when the hot melt is in the first state, the orthographic projection of the protrusion on the third surface does not coincide with the orthographic projection of the hot melt on the third surface;

[0016] When the hot melt is in the second state, the orthographic projection of the protrusion on the third surface is located within the orthographic projection of the hot melt on the third surface.

[0017] Optionally, the body portion is arc-shaped, and the concave surface of the arc is connected to the hook portion.

[0018] Optionally, the hook portion includes a first plate portion and a second plate portion connected together;

[0019] The first plate portion is connected to the second surface and extends away from the body portion;

[0020] The second plate portion is connected to the end of the first plate portion away from the second surface and is bent toward the second surface, and the retaining area is formed between the end face of the second plate portion and the second surface;

[0021] When the portion of the target component located around the hole to be sealed is within the holding area, the end of the second plate portion near the second surface abuts against the fourth surface.

[0022] Optionally, the second plate portion includes a first portion and a second portion;

[0023] The two ends of the first part are respectively connected to the end of the first plate portion away from the second surface and the end of the second part;

[0024] In the direction from the second surface to the first surface, the distance between the second portion and the first plate portion gradually increases, wherein the second portion can contract toward the first plate portion when pressed.

[0025] Optionally, the main body includes two hook portions, which are arranged opposite each other in the radial direction of the main body and have a gap between them.

[0026] Optionally, the hot melt component includes a polymer-based adhesive and a foaming agent.

[0027] On the other hand, this application also provides a vehicle, which includes a target component and a seal as described in any of the above embodiments of this application. The target component has a hole to be sealed, and the seal is used to seal the hole to be sealed.

[0028] The sealing element provided in this application includes a main body and a heat-fused component. The main body includes a connected pressing portion and a hook portion. A portion of the hook portion extends into the hole to be sealed in the target component. The portion of the target component located around the hole to be sealed can be engaged in the holding area formed between the hook portion and the pressing portion, thereby allowing the sealing element to be assembled with the target component. The heat-fused component covers the circumferential portion of the main body. When the heat-fused component is heated, it can change from a first form to a second form, thereby bonding the pressing portion and the target component together to seal the hole to be sealed. Because the heat-fused component in the second form has adhesive properties, the bonding strength between the heat-fused component and the target component can be improved. That is, the heat-fused component can more firmly fix the circumferential portion of the main body to the target component, thereby improving the sealing performance of the sealing element. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of a sealing element provided in an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the structure of the main component in a sealing element provided in an embodiment of this application;

[0032] Figure 3 This is a cross-sectional schematic diagram of a sealing element in a first state according to an embodiment of this application;

[0033] Figure 4 This is a top view of a sealing element and a target element assembled according to an embodiment of this application;

[0034] Figure 5 yes Figure 4 A cross-sectional view and a partially enlarged view of a sealing element in its second state at section AA are provided in the embodiments of this application.

[0035] Figure 6This is a side view of a sealing element provided in an embodiment of this application.

[0036] Figure label:

[0037] 100. Main body; 101. Pressing part; 102. Hook part; 103. Holding area; 104. Body part; 105. Extension part; 106. Through hole; 107. First surface; 108. Second surface; 109. Protrusion; 110. First plate part; 111. Second plate part; 112. First part; 113. Second part; 114. Gap; 115. Connecting part;

[0038] 200. Hot melt parts;

[0039] 300, Target component; 301, Hole to be sealed; 302, Third surface; 303, Fourth surface.

[0040] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] In the embodiments of this application, directional terms such as "upper," "lower," and "side" are generally used in the following ways: Figure 1 The relative positions shown are based on established rules, and these directional terms are used merely to more clearly describe the structures and their relationships, not to describe absolute positions. Positions may change when the product is placed in different orientations; for example, "up" and "down" may be interchanged. Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by those skilled in the art.

[0043] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0044] Combination Figure 1 , Figure 3 and Figure 5 As shown in the figure, this application provides a sealing element, which includes a main body 100 and a heat-fused part 200.

[0045] The main component 100 includes a connected pressing part 101 and a hook part 102. A holding area 103 is formed between the hook part 102 and the pressing part 101. A portion of the hook part 102 extends into the hole 301 to be sealed in the target component 300. The holding area 103 is used to hold the portion of the target component 300 located around the hole 301 to be sealed. Thus, the seal can be assembled with the target component 300. It should be noted that the target component 300 can be, for example, a sheet metal part such as a vehicle floor, sill, or door panel. The hole 301 to be sealed refers to a hole opened at a required location on the target component 300 to meet the needs of weight reduction, welding processes, or painting processes of the vehicle body itself, and a hole that needs to be sealed during the painting or final assembly stage of the vehicle to enhance driving comfort and sealing requirements. The shape of the hole 301 to be sealed can be, for example, circular, oblong, or other irregular shapes. The shape of the hole 301 to be sealed is not limited in this embodiment.

[0046] The heat-fused part 200 encloses the circumferential portion of the main body 100. It should be noted that the circumferential portion of the heat-fused part 200 enclosing the main body 100 refers to the portion of the upper surface of the main body 100 that is circumferentially enclosed by the heat-fused part 200, the portion of the lower surface of the main body 100 that is circumferentially enclosed by the heat-fused part 200, and the side surface of the main body 100.

[0047] When the heat-melting component 200 is heated, it changes from a first form to a second form to bond the pressing part 101 and the target part 300 together to seal the hole 301 to be sealed.

[0048] It should be noted that, because the heat-fused component 200 in its second form is adhesive, it enhances the bonding strength between the heat-fused component 200 and the target component 300. In other words, the heat-fused component 200 can more firmly fix the circumferential portion of the main body 100 to the target component 300, thereby improving the sealing performance of the seal. Furthermore, since the heat-fused component 200 covers the circumferential portion of the main body 100, assembly personnel can quickly inspect the sealing defects of the seal by visually inspecting its outer surface, thus improving the efficiency of inspecting sealing defects.

[0049] The following is in conjunction with the appendix Figures 1 to 6 The details and functions of the sealing elements provided in the embodiments of this application will be described in more specific and detailed manner.

[0050] Combination Figure 4 and Figure 5 As shown, in some embodiments, the heat-fused component 200 includes a polymer-based adhesive. Thus, when the heat-fused component 200 is heated to a certain temperature, it melts and becomes viscous, thereby increasing the bonding strength between the main component 100 and the target component 300, firmly bonding the main component 100 and the target component 300 together.

[0051] In some embodiments, the hot melt component 200 includes a polymer-based adhesive and a foaming agent. Because the hot melt component 200 contains a polymer-based adhesive, it melts and becomes viscous when heated to a certain temperature, thereby increasing the bonding strength between the main component 100 and the target component 300, firmly bonding them together. Simultaneously, because the hot melt component 200 contains a foaming agent, it expands when heated, allowing it to rapidly expand outwards and seal the hole 301 to be sealed. It should be noted that because the foaming agent increases the volume of the hot melt component 200, the content of the polymer-based adhesive in the hot melt component 200 can be reduced, thereby lowering the cost of the hot melt component 200.

[0052] In some embodiments, the foaming agent is a closed-cell material, so that when the hot melt part 200 is melted into the second form, it can also play a certain sound insulation role, thereby improving the NVH performance of the target part 300.

[0053] In some embodiments, the foaming rate of the heat-fused component 200 is 30% to 60%, thereby further reducing the amount of material used in the heat-fused component 200 while ensuring a seal, thus ensuring a lower cost for the seal. In some instances, the foaming rate of the heat-fused component 200 can be 40% to 50% to minimize the cost of the heat-fused component 200.

[0054] In some embodiments, the polymer-based adhesive is, for example, an ethylene-vinyl acetate copolymer or an ethylene-methacrylate copolymer.

[0055] Combination Figure 3 and Figure 5 As shown, in some embodiments, the heat-fused component 200 is annular, and when in its first form, its width is 2mm to 3mm. This ensures that when the heat-fused component 200 melts into its second form, the sealant has a good sealing effect and can be stably bonded to the target component 300. In some embodiments, the width of the heat-fused component 200 can be 2.5mm. This ensures effective sealing of the heat-fused component 200, resulting in high NVH performance after sealing the target component 300, while also keeping the cost of the heat-fused component 200 low.

[0056] Combination Figure 3 and Figure 5As shown, in some embodiments, the heat-fused component 200 melts from a first form to a second form when the heating temperature reaches a first temperature. The heat deformation temperature of the main body 100 is the second temperature, which is higher than the first temperature. This ensures that the main body 100 will not deform when the heat-fused component 200 is heated. In some embodiments, the first temperature is any temperature between 140°C and 160°C. The heating time of the heat-fused component 200 is 10 to 20 minutes. It should be noted that, generally, the heat-fused component 200 can be heated during the painting oven stage of a vehicle to melt the heat-fused component 200 from the first form to the second form to seal the hole 301 to be sealed. In some embodiments, the heating time can be 15 to 20 minutes. This ensures that the heat-fused component 200 can be sufficiently heated and expand rapidly.

[0057] In some embodiments, the main body 100 is made of a thermoplastic synthetic material. The main body 100 can be processed by injection molding. It should be noted that the thermoplastic synthetic material can be, for example, polyamide or polyimide. This ensures that the main body 100 has a high heat distortion temperature, for example, the second temperature can be greater than 250°C. Thus, when the hot melt 200 is heated, the main body 100 can still maintain its original shape.

[0058] In some embodiments, the main body 100 is made of thermoplastic composite material and glass fiber, and the main body 100 can be processed by injection molding. It should be noted that the thermoplastic composite material can ensure that the main body 100 has a high heat distortion temperature, and the glass fiber can further improve the strength of the main body 100, prevent the main body 100 from deforming, and improve the stability and reliability of the seal.

[0059] It should be noted that the main body 100 and the hot melt component 200 can be injection molded into one piece using injection molding processes such as co-injection molding, side-by-side injection molding, or two-color injection molding. The processing of the seal can be, for example, as follows: First, thermoplastic synthetic material or a combination of thermoplastic synthetic material and glass fiber is injected into the injection mold of the main body 100. After cooling, the main body 100 is formed and demolded. Then, a polymer-based adhesive and foaming agent are injected into the circumference of the main body 100. After cooling, a hot melt component 200 is formed that encloses the circumference of the main body 100. Finally, the main body 100 and the hot melt component 200, which are injection molded as a single piece, are demolded to obtain the seal.

[0060] Combination Figure 3 and Figure 5As shown, in some embodiments, the pressing part 101 includes a body part 104 and an extension part 105. One side of the extension part 105 is circumferentially connected to the body part 104, and the other side extends away from the body part 104. The extension part 105 has a plurality of through holes 106, which are evenly distributed along the circumference of the extension part 105. The through holes 106 are used to accommodate a portion of the hot melt component 200. The hot melt component 200 covers the extension part 105 and the portion of the body part 104 adjacent to the extension part 105. It should be noted that when the body part 100 and the hot melt component 200 are injection molded, a portion of the hot melt component 200 enters into the through hole 106, so that the body part 100 can be fixed together with the hot melt component 200, and the body part 100 can also provide support for the hot melt component 200.

[0061] Combination Figure 3 and Figure 5 As shown, in some embodiments, the pressing part 101 includes a first surface 107 and a second surface 108 facing away from each other. The second surface 108 is connected to the hook part 102. The second surface 108 is connected with a plurality of protrusions 109. The plurality of protrusions 109 are evenly distributed along the circumference of the second surface 108 and are located inside the plurality of through holes 106.

[0062] The target component 300 includes a third surface 302 and a fourth surface 303 facing away from each other. The third surface 302 faces the second surface 108, and the fourth surface 303 faces away from the second surface 108. When the portion of the target component 300 located around the hole to be sealed 301 is located within the holding area 103, the protrusion 109 is adapted to abut against the third surface 302, and the end of the hook portion 102 is adapted to abut against the fourth surface 303. It should be noted that after the protrusion 109 abuts against the third surface 302, a gap can be formed between the circumferential direction of the second surface 108 and the third surface 302. Therefore, when the heat-fused component 200 is heated to the second state, it can fill the gap between the circumferential direction of the second surface 108 and the third surface 302, increasing the contact area between the heat-fused component 200 and both the second and third surfaces 108 and 302. This improves the bonding force between the pressing part 101 and the target component 300, and ensures that there is a certain thickness of adhesive heat-fused component 200 between the circumferential direction of the second surface 108 and the third surface 302. In other words, it improves the sealing effect of the hole 301 to be sealed, and ensures that the seal can withstand high pressure without detaching from the target component 300, thus improving the reliability and stability of the connection between the seal and the target component 300.

[0063] Combination Figure 1 As shown, in some embodiments, the thickness of the pressing part 101 is 1mm to 2.5mm, for example, it can be 2mm. In this way, when the sealant seals the hole to be sealed 301, the sealant can not only prevent impurities from flowing into the hole to be sealed 301, but also achieve a good sound insulation effect.

[0064] Combination Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments, when the heat-fused component 200 is in the first state, the orthographic projection of the protrusion 109 on the third surface 302 does not coincide with the orthographic projection of the heat-fused component 200 on the third surface 302. When the heat-fused component 200 is in the second state, the orthographic projection of the protrusion 109 on the third surface 302 is located within the orthographic projection of the heat-fused component 200 on the third surface 302. That is, when the heat-fused component 200 melts, the contact area between the second surface 108 and the third surface 302 can be increased, thereby improving the bonding force between the seal and the target component 300. It should be noted that when the heat-fused component 200 is heated and changes from the first form to the second form, a portion of the heat-fused component 200 can wrap around the protrusion 109, fill the area between two adjacent protrusions 109 and the gap between the circumferential surface of the second surface 108 and the third surface 302, and another portion can wrap around the surface of the extension 105 and the circumferential surface adjacent to the body portion 104 and the extension 105, thereby stably bonding the seal to the target component 300 and improving the sealing effect of the seal.

[0065] like Figure 3 As shown, in some embodiments, the body portion 104 is arc-shaped, and the concave surface of the arc is connected to the hook portion 102. It should be noted that when assembling the seal with the hole 301 to be sealed of the target part 300, the convex surface of the arc makes it easier for the operator to press it to insert a part of the hook portion 102 into the hole 301 to be sealed, which facilitates assembly.

[0066] Combination Figure 2 and Figure 3 As shown, in some embodiments, the latch portion 102 includes a first plate portion 110 and a second plate portion 111 connected together. The first plate portion 110 is connected to the second surface 108 and extends away from the body portion 104. The second plate portion 111 is connected to the end of the first plate portion 110 away from the second surface 108 and bends toward the second surface 108, and a holding area 103 is formed between the end face of the second plate portion 111 and the second surface 108.

[0067] When the portion of the target component 300 surrounding the hole to be sealed 301 is located within the holding area 103, the end of the second plate portion 111 near the second surface 108 abuts against the fourth surface 303. It should be noted that the hook component is elastic. The process of installing the seal into the hole to be sealed 301 is as follows: the end of the hook portion 102 away from the body portion 104 gradually extends into the hole to be sealed 301. During this extension, the second plate portion 111 contracts under the inward pressure exerted by the hole wall of the hole to be sealed 301. When the second plate portion 111 is fully inserted into the hole to be sealed 301, it opens outward to its initial state without the pressure from the hole to be sealed 301. At this time, the end of the second plate portion 111 near the second surface 108 abuts against the fourth surface 303, and the protrusion 109 abuts against the third surface 302, so that the portion of the target component 300 surrounding the hole to be sealed 301 can be stably held by the seal.

[0068] like Figure 2 As shown, in some embodiments, the second plate portion 111 includes a first portion 112 and a second portion 113. The two ends of the first portion 112 are connected to one end of the first plate portion 110 away from the second surface 108 and one end of the second portion 113, respectively. In the direction from the second surface 108 to the first surface 107, the distance between the second portion 113 and the first plate portion 110 gradually increases, wherein the second portion 113 can contract towards the first plate portion 110 when compressed. This arrangement provides sufficient deformation space for the second portion 113 to contract under pressure within the area formed between the first plate portion 110 and the second portion 113.

[0069] like Figure 2 and Figure 6 As shown, in some embodiments, the main body 100 includes two hook portions 102, which are arranged opposite each other in the radial direction of the main body 104 and have a gap 114. It should be noted that by setting the gap 114, the two hook portions 102 can be prevented from interfering with each other when squeezed and contracted by the hole to be sealed 301, that is, sufficient deformation space is provided for the hook portions 102.

[0070] like Figure 2As shown, in some embodiments, the main body 100 further includes two connecting portions 115, one end of which is connected to the main body 104, and the other end extends away from the main body 104. Each connecting portion 115 has its two sides connected to adjacent sides of the two hook portions 102. By providing the connecting portions 115, the two hook portions 102 can be stably connected together, providing support and increasing their strength. In some embodiments, the size of the hook portion 102 is smaller than the size of the hook portion 102 in the axial direction of the hole 301 to be sealed, thereby ensuring that the two hook portions 102 have a gap 114 in the radial direction of the main body 104, providing sufficient space for deformation of the hook portion 102.

[0071] It should be noted that the installation process of the seal and the target part 300 is as follows: First, the portion of the target part 300 located around the hole to be sealed 301 is clamped by the holding area 103 formed by the hook part 102 and the body part 104. Generally, the target part 300 is a sheet metal part after electrophoresis. Then, the target part 300 enters the painting and baking oven. After baking and cooling in the painting and baking oven, the hot melt part 200 changes from the first form to the second form, so as to stably bond the target part 300 and the body part 100 together, thereby completing the sealing of the hole to be sealed 301.

[0072] On the other hand, this application embodiment also provides a vehicle, which includes a target part 300 and a sealing element as described in any of the above embodiments of this application. The target part 300 has a hole 301 to be sealed, and the sealing element is used to seal the hole 301 to be sealed. It should be noted that the sealing element in the vehicle provided in this application embodiment has the same composition and function as any of the sealing elements provided in the above embodiments of this application, so this application embodiment will not repeat it here. The target part 300 can be, for example, a sheet metal part such as a floor, sill, or door panel of the vehicle. The hole 301 to be sealed refers to a hole opened at a required position on the target part 300 to meet the needs of weight reduction, welding process, or painting process of the vehicle body itself, and a hole that needs to be sealed during the painting or final assembly stage of the vehicle to enhance driving comfort and sealing requirements. The shape of the hole 301 to be sealed can be, for example, circular, oblong, or other irregular shapes, and this application embodiment does not limit the shape of the hole 301 to be sealed.

[0073] Because the heat-fused component 200 in the seal can change from a first form to a second form after being heated and melted, and has high viscosity, the seal can be more stably bonded to the target component 300 to seal the hole 301 to be sealed. Due to the high sealing performance of the seal, the sealing effect of the hole 301 to be sealed is improved, thus preventing impurities or noise from entering the vehicle interior through the hole 301. This further improves the sound insulation and noise reduction in the vehicle cabin, significantly enhancing the vehicle's NVH performance and ultimately improving the comfort of the passenger.

[0074] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0075] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A sealing element, characterized in that, The sealing element includes a main body (100) and a heat-fused component (200); The main body (100) includes a connected pressing part (101) and a hook part (102), and a holding area (103) is formed between the hook part (102) and the pressing part (101). A portion of the hook part (102) extends into the hole (301) to be sealed in the target part (300), and the holding area (103) is used to hold the portion of the target part (300) located around the hole (301) to be sealed; the pressing part (102) 01) Includes a body portion (104) and an extension portion (105); one side of the extension portion (105) is circumferentially connected to the body portion (104), and the other side extends away from the body portion (104); the extension portion (105) has a plurality of through holes (106), the plurality of through holes (106) are evenly distributed along the circumferential direction of the extension portion (105), and the through holes (106) are used to accommodate part of the hot melt component (200); wherein, the pressing The part (101) includes a first surface (107) and a second surface (108) facing away from each other. The second surface (108) is connected to the hook part (102). The second surface (108) is connected with a plurality of protrusions (109). The plurality of protrusions (109) are evenly distributed along the circumference of the second surface (108) and located inside the plurality of through holes (106). The target part (300) includes a third surface (302) and a fourth surface (303) facing away from each other. The third surface (302) faces the second surface (108), and the fourth surface (303) faces away from the second surface (108). When the portion of the target part (300) located around the hole to be sealed (301) is located in the holding area (103), the protrusions (109) are adapted to abut against the third surface (302), and the end of the hook part (102) is adapted to abut against the fourth surface (303). The hot melt component (200) encloses the extension (105) and the portion of the body (104) that connects with the extension (105); When the heat-fused component (200) is heated, it changes from a first form to a second form. When the heat-fused component (200) is in the first form, the orthographic projection of the protrusion (109) on the third surface (302) does not coincide with the orthographic projection of the heat-fused component (200) on the third surface (302). When the heat-fused component (200) is in the second form, the orthographic projection of the protrusion (109) on the third surface (302) is located within the orthographic projection of the heat-fused component (200) on the third surface (302), so as to bond the pressing part (101) and the target part (300) together to seal the hole (301) to be sealed.

2. The seal according to claim 1, characterized in that, The main body (104) is arc-shaped, and the concave surface of the arc is connected to the hook part (102).

3. The seal according to claim 1, characterized in that, The hook portion (102) includes a first plate portion (110) and a second plate portion (111) connected together. The first plate portion (110) is connected to the second surface (108) and extends away from the body portion (104); The second plate portion (111) is connected to the end of the first plate portion (110) away from the second surface (108) and is bent toward the second surface (108), and the retaining area (103) is formed between the end face of the second plate portion (111) and the second surface (108). When the portion of the target part (300) located around the hole to be sealed (301) is located within the holding area (103), the end of the second plate portion (111) near the second surface (108) abuts against the fourth surface (303).

4. The seal according to claim 3, characterized in that, The second plate portion (111) includes a first part (112) and a second part (113); The two ends of the first portion (112) are respectively connected to one end of the first plate portion (110) away from the second surface (108) and one end of the second portion (113); In the direction from the second surface (108) to the first surface (107), the distance between the second part (113) and the first plate (110) gradually increases, wherein the second part (113) can contract toward the first plate (110) when pressed.

5. The seal according to claim 1, characterized in that, The main body (100) includes two hook portions (102), which are arranged opposite each other in the radial direction of the main body (104) and have a gap (114).

6. The seal according to claim 1, characterized in that, The hot melt component (200) includes a polymer-based adhesive and a foaming agent.

7. A vehicle, characterized in that, The vehicle includes a target component (300) and a seal as described in any one of claims 1 to 6, the target component (300) having a hole to be sealed (301), and the seal being used to seal the hole to be sealed (301).

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