Sealing piece, sealing structure and vehicle

Abstract

The sealing piece is used for filling a cavity of a vehicle body and comprises a middle layer capable of flexibly deforming, a first foaming layer and a second foaming layer, the middle layer is provided with a first surface and a second surface which are distributed in the thickness direction, the first foaming layer is connected to the first surface, and the second foaming layer is connected to the second surface. And the second foaming layer is connected to the second surface. The sealing structure comprises a sealing piece and a connecting piece, and the connecting piece is used for connecting the sealing piece to the automobile body. According to the sealing piece, the sealing structure and the vehicle, foamed materials can be distributed more evenly, and therefore the sealing effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle body, and more particularly to a sealing sheet, sealing structure and vehicle. Background Technology

[0002] There are some enclosed reinforcing beam structures in the vehicle body, such as the A-pillar, B-pillar, C-pillar, door sill, front bulkhead, and side bulkhead. These structures have a lot of cavities. When the vehicle is traveling at high speed, these cavities will generate high-speed airflow, which will bring strong noise and vibration to passengers and drivers. Therefore, these cavities need to be filled and sealed.

[0003] In related technologies, foam material is fixed with a bracket to seal the cavity. However, different brackets need to be designed for different cavity shapes, resulting in poor versatility. One technical solution uses a steel plate as an intermediate layer and places the foam material on the surface of the steel plate. However, it was found that the sealing effect after foaming was poor during use. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a sealing structure that can achieve a relatively better sealing effect.

[0005] This utility model proposes a sealing sheet for use in the above-mentioned sealing structure.

[0006] This utility model also proposes a vehicle having the above-mentioned sealing structure.

[0007] A sealing sheet according to a first aspect of the present invention is used to fill cavities in a vehicle body, comprising a flexible deformable intermediate layer, a first foam layer, and a second foam layer, wherein the intermediate layer has a first surface and a second surface distributed along the thickness direction, the first foam layer is connected to the first surface, and the second foam layer is connected to the second surface.

[0008] The sealing sheet according to the embodiments of this utility model has at least the following beneficial effects:

[0009] The sealing sheet is placed inside the cavity of the vehicle body. The first and second foam layers expand under high temperature to seal the cavity. Because the cavity walls of the vehicle body are uneven and the intermediate layer can be flexibly deformed, during the foaming process, the intermediate layer can bend and deform towards the concave area of ​​the cavity wall with the expansion pressure of the two foam layers to adapt to the uneven cavity walls. This results in a more uniform distribution of the foamed material after foaming, thereby improving the sealing effect.

[0010] According to some embodiments of this utility model, the material of the intermediate layer is a fiber woven fabric.

[0011] According to some embodiments of the present invention, the thickness of the sealing sheet is greater than or equal to 0.1 mm and less than or equal to 10 mm.

[0012] A sealing structure according to a second aspect of the present invention includes:

[0013] The sealing sheet described in the above embodiments;

[0014] A connector for connecting the sealing sheet to the vehicle body.

[0015] The sealing structure according to the embodiments of this utility model has at least the following beneficial effects:

[0016] The sealing strip is placed inside the cavity of the vehicle body and is connected to the vehicle body via a connector to maintain its relative position within the cavity. The first and second foam layers expand under high temperature to seal the cavity. Because the intermediate layer is flexible, it deforms under the expansion pressure of the first and second foam layers during the foaming process, resulting in a more uniform distribution of the foamed material and thus improving the sealing effect.

[0017] According to some embodiments of the present invention, the sealing sheet has a through hole, the connector includes a connecting part and a positioning part connected to each other, the positioning part abuts against the first foam layer, the connecting part passes through the through hole and protrudes from the side of the second foam layer facing away from the second surface, and the connecting part is used to connect with the vehicle body.

[0018] According to some embodiments of the present invention, the connecting part includes a body and a retaining tooth disposed on the side of the body.

[0019] According to some embodiments of the present invention, the sealing sheet has through holes, and the number of through holes is multiple. Along the length direction of the sealing sheet, the multiple through holes are spaced apart from each other, and some of the through holes are located in the middle of the sealing sheet.

[0020] According to some embodiments of the present invention, the sealing sheet has through holes, and the number of through holes is multiple, wherein the length extension direction of at least one through hole is different from the length extension direction of the remaining through holes.

[0021] A vehicle according to a third aspect of the present invention includes a multi-body structure and the sealing structure described in the above embodiments, wherein the body structure has the cavity and the sealing sheet is disposed within the cavity.

[0022] According to some embodiments of the present invention, the vehicle body is provided with an opening, and the connector cooperates with the opening to connect the sealing sheet to the vehicle body.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0025] Figure 1 This is a schematic diagram of the sealing structure according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0027] Figure 3 This is a schematic diagram of the sealing sheet of the sealing structure according to an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the layered structure of the sealing sheet in an embodiment of the present utility model.

[0029] Figure 5 This is a schematic diagram of the vehicle body and sealing sheet according to an embodiment of the present utility model;

[0030] Figure 6 This is a schematic diagram of the vehicle body and sealing structure according to an embodiment of the present utility model.

[0031] Figure label:

[0032] 100, sealing sheet; 110, intermediate layer; 120, first foam layer; 130, second foam layer; 100a, through hole;

[0033] 200. Connector; 210. Connecting part; 220. Positioning part; 221. Side protrusion; 222. Rectangular section; 211. Body; 212. Locking tooth;

[0034] 20. Vehicle body. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having” and any variations thereof in the embodiments of this application are intended to cover non-exclusive inclusion.

[0037] One technical solution uses a steel plate as an intermediate layer, with the foaming material placed on the surface of the steel plate. The disadvantage is that the steel plate itself has high rigidity and hardness, and cannot deform during the foaming process to adapt to the uneven surface of the car body cavity, affecting the uniformity of foaming and thus affecting the sealing effect. In addition, the surface of the steel plate is relatively smooth, which affects the adhesion of the foaming material. During the foaming process, the foaming material is prone to slipping or falling off the surface of the steel plate, further affecting the sealing effect.

[0038] Please refer to the following for details. Figures 3-4 This application provides a sealing sheet for filling cavities in a vehicle body. The cavity can improve the bending and torsional resistance of the vehicle body 20, and also play a role in buffering and absorbing energy.

[0039] Please refer to Figures 1-4 This application embodiment also provides a sealing structure, which includes a sealing sheet 100 and a connector 200. The sealing sheet 100 is disposed in the cavity of the vehicle body 20 and can expand by heating. The sealing sheet 100 is connected to the vehicle body 20 via the connector 200.

[0040] Please refer to Figure 5 and Figure 6 This application also provides a vehicle, including a sealing structure and a body 20, the body 20 having a cavity. A sealing sheet 100 is disposed within the cavity of the body 20, and the sealing sheet 100 can expand when heated to seal the cavity.

[0041] Please refer to Figure 3 and Figure 4 The sealing sheet 100 includes a flexible deformable intermediate layer 110, a first foamed layer 120, and a second foamed layer 130. It is understood that the intermediate layer 110 is made of a flexible material and can deform during the foaming process to better adapt to the bending deformation of the inner wall of the cavity.

[0042] The intermediate layer 110 has a first surface and a second surface distributed along its thickness direction. A first foamed layer 120 is connected to the first surface, and a second foamed layer 130 is connected to the second surface. That is, the intermediate layer 110 is located between the first foamed layer 120 and the second foamed layer 130. The first foamed layer 120 and the second foamed layer 130 are capable of expanding and foaming when heated. During the production process, after the car body 20 completes electrophoretic coating, it enters an electrophoretic drying oven, where the first foamed layer 120 and the second foamed layer 130 are heated and expand. In some specific embodiments, the first foamed layer 120 and the second foamed layer 130 are made of ethylene-vinyl acetate copolymer.

[0043] Please refer to Figure 5 and Figure 6 During use, materials of a preset shape and size can be cut to form the required sealing sheet 100 according to the sealing position of the cavity of the body 20. Then, the sealing sheet 100 is placed at the sealing position of the cavity of the body 20 and connected to the body 20 through the connector 200.

[0044] In the above embodiment, the sealing sheet 100 is disposed within the cavity of the vehicle body 20, and the sealing sheet 100 is connected to the vehicle body 20 via the connector 200 to maintain the relative position of the sealing sheet 100 within the cavity. The foamed material expands under high temperature, achieving a seal on the cavity. Because the cavity wall of the vehicle body 20 is uneven, and the intermediate layer 110 is flexible and deformable, during the foaming process, the intermediate layer 110 can bend and deform towards the recessed area of ​​the cavity wall according to the expansion pressure of the foamed material to adapt to the uneven cavity wall, resulting in a more uniform distribution of the foamed material after foaming, thereby improving the sealing effect.

[0045] In some embodiments, the intermediate layer 110 is made of woven fiber fabric. It is understood that the fibers on the surface of the woven fiber fabric have minute gaps, and portions of the first foam layer 120 and the second foam layer 130 can enter these minute gaps, thereby increasing the bonding area between the intermediate layer 110 and the two foam layers, while limiting the slippage of the foaming material during the foaming process, thus ensuring a sealing effect after foaming. In some specific embodiments, the intermediate layer 110 is made of nylon woven fabric.

[0046] The number of connectors 200 is unlimited. For example, connectors 200 can be set at both ends of the sealing sheet 100.

[0047] Please refer to Figure 3 To facilitate the installation of the connector 200, in some embodiments, the sealing sheet 100 has a through hole 100a, which can be directly formed on the sealing sheet 100 during the cutting process. The connector 200 is disposed at the through hole 100a, thereby facilitating the positioning and installation of the connector 200.

[0048] Please refer to the following: Figure 2 The connector 200 includes a connecting portion 210 and a positioning portion 220 connected to each other, with the positioning portion 220 abutting against the first foam layer 120. It is understood that, along the thickness direction, the portion of the positioning portion 220 projected onto the reference plane is located outside the projection of the through hole 100a onto the reference plane, thus enabling the positioning portion 220 to abut against the sealing sheet 100.

[0049] The connecting portion 210 passes through the through hole 100a and protrudes from the side of the second foam layer 130 facing away from the second surface. The connecting portion 210 is used to connect with the vehicle body 20. The positioning portion 220 presses the sealing sheet 100 onto the cavity wall of the vehicle body 20, thereby achieving the connection between the sealing sheet 100 and the vehicle body 20. It should be noted that during the foaming process, the expanded foam material can cover the positioning portion 220 and the portion of the connecting portion 210 that does not protrude from the vehicle body 20, thereby ensuring the sealing performance after foaming.

[0050] It is understood that the specific structure of the connecting part 210 is not limited, as long as it can connect the sealing sheet 100 to the vehicle body 20. In some embodiments, the connecting part 210 is a snap-fit ​​structure, which can be quickly snapped onto the vehicle body 20 when assembled with the sealing structure, thereby improving assembly efficiency. Specifically, the positioning part 220 provides a position for the operator to apply force, so that the connecting part 210 can be snapped onto the vehicle body 20, and at the same time, the positioning part 220 can press the sealing sheet 100 onto the vehicle body 20.

[0051] In some specific embodiments, please refer to Figure 1 and Figure 2 The connecting part 210 includes a body 211 and a pair of locking teeth 212 disposed on the side of the body 211. The locking teeth 212 are disposed on opposite sides of the body 211 and protrude outward. The locking teeth 212 are used to engage with the opening of the body 20. Along the thickness direction, multiple sets of locking teeth 212 are disposed at intervals on both sides.

[0052] The vehicle body 20 has an opening located on the cavity wall, through which the connector 200 is secured to the vehicle body 20. The positioning part 220 can be rectangular. In some specific embodiments, to further increase the contact area with the sealing sheet 100, the positioning part 220 includes a rectangular portion 222 and side protrusions 221. The rectangular portion 222 is rectangular, and the side protrusions 221 are located at the four corners of the rectangular portion 222, all protruding outwards in the width direction of the rectangular portion 222, thereby increasing the width dimension of the positioning part 200.

[0053] Along the thickness direction, the projection of the locking tooth 212 on the reference plane is located outside the opening of the vehicle body 20, and the locking tooth 212 can elastically deform, so that it can deform and contract to pass through the opening under the action of external force, and then return to the position of engaging in the opening. Among them, the locking tooth 212 is inclined towards the positioning part 220, and the inclined locking tooth 212 can guide it through the opening and improve the stability of engagement.

[0054] To further improve the stability of the connection with the vehicle body 20, in some embodiments, there are multiple through holes 100a. These through holes 100a are spaced apart along the length of the sealing sheet 100, and some through holes 100a are located in the middle of the sealing sheet 100. It is understood that, since a relatively flexible material is used as the middle layer 110 of the sealing sheet 100, in use scenarios, after the two ends of the sealing sheet 100 are fixed, the middle region along its length is relatively prone to deformation and displacement. By placing some connectors 200 at the through holes 100a in the middle of the sealing sheet 100, the aforementioned middle region can be constrained, thereby greatly reducing its deformation and displacement.

[0055] The shape of the through hole 100a is not limited, but in some specific embodiments, the through hole 100a is rectangular.

[0056] To achieve proper installation and positioning of the sealing structure, in some embodiments, there are multiple through holes 100a, where at least one through hole 100a extends in a different direction than the remaining through holes 100a. It is understood that the vehicle body 20 has an opening whose shape and orientation are approximately the same as the through hole 100a. When the sealing plate 100 is installed in the wrong direction, the through hole 100a cannot be aligned with the opening on the vehicle body 20, thus preventing misalignment.

[0057] Furthermore, in order to detect errors in the installation orientation of the sealing structure as early as possible, thereby reducing the possibility of disassembling the connector from the vehicle body 20, in some embodiments, the length extension directions of the through holes 100a at both ends of the sealing sheet 100 in the longitudinal direction are different, or the length extension directions of any two adjacent through holes 100a on the sealing sheet 100 are different.

[0058] It is understood that the thickness of the sealing sheet 100 can be adjusted according to the cavity of the vehicle body 20. In some specific embodiments, the thickness of the sealing sheet 100 is greater than or equal to 0.1 mm and less than or equal to 10 mm.

[0059] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0060] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0061] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0062] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0063] If the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

Claims

1. A sealing sheet, characterized in that, The device is used to fill cavities in a vehicle body and includes a flexible deformable intermediate layer, a first foam layer, and a second foam layer. The intermediate layer has a first surface and a second surface distributed along the thickness direction. The first foam layer is connected to the first surface, and the second foam layer is connected to the second surface.

2. The sealing sheet according to claim 1, characterized in that, The material of the middle layer is a fiber-woven fabric.

3. The sealing sheet according to claim 1, characterized in that, The thickness of the sealing sheet is greater than or equal to 0.1 mm and less than or equal to 10 mm.

4. A sealing structure, characterized in that, include: The sealing sheet according to any one of claims 1-3; A connector for connecting the sealing sheet to the vehicle body.

5. The sealing structure according to claim 4, characterized in that, The sealing sheet has a through hole, and the connector includes a connecting part and a positioning part connected to each other. The positioning part abuts against the first foam layer, and the connecting part passes through the through hole and protrudes from the side of the second foam layer facing away from the second surface. The connecting part is used to connect with the vehicle body.

6. The sealing structure according to claim 5, characterized in that, The connecting part includes a body and a retaining tooth disposed on the side of the body.

7. The sealing structure according to claim 4, characterized in that, The sealing sheet has multiple through holes, which are spaced apart along the length of the sealing sheet, and some of the through holes are located in the middle of the sealing sheet.

8. The sealing structure according to claim 4, characterized in that, The sealing sheet has through holes, and there are multiple through holes, wherein the length extension direction of at least one through hole is different from the length extension direction of the remaining through holes.

9. A vehicle, characterized in that, The device includes a vehicle body and a sealing structure as described in any one of claims 4-8, wherein the vehicle body has the cavity and the sealing sheet is disposed within the cavity.

10. The vehicle according to claim 9, characterized in that, The vehicle body has an opening, and the connector engages with the opening to connect the sealing sheet to the vehicle body.

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