Column A inner cavity sealing structure and vehicle

Abstract

The utility model relates to the technical field of automobile manufacturing, and particularly provides an A column inner cavity sealing structure and a vehicle. The sealing structure for the inner cavity of the A column comprises a blocking piece preassembled in the inner cavity of the A column, wherein the blocking piece is used for dividing the inner cavity into two parts; the blocking piece comprises a sleeve arranged in the length direction of the A column and a foaming unit arranged outside the sleeve. A foaming body which can be heated to foam and expand is arranged in the foaming unit, and the expanded foaming body can form sealing between the sleeve and the inner wall of the inner cavity. According to the A column inner cavity sealing structure, the blocking piece is pre-installed, so that the blocking piece is conveniently pre-installed on a sheet metal part such as a side wall outer plate or an A column upper section inner plate of the A column, the foaming body located outside the sleeve is heated to expand by means of the later coating and baking technological process of the A column assembly, and therefore the sealing effect of the A column inner cavity is improved. The gap between the blocking piece and the inner wall of the inner cavity is completely sealed and separated, and therefore the purpose of improving the blocking and sealing effect of the inner cavity of the A column can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile manufacturing, and in particular to an A-pillar inner cavity sealing structure. In addition, the utility model also relates to a vehicle. Background Art

[0002] At the front of the side of the vehicle, the A-pillar is usually formed by the side outer panel and the upper inner panel of the A-pillar, and a hollow inner cavity of the A-pillar is formed between the side outer panel and the upper inner panel of the A-pillar. When the vehicle is driving at high speed, the airflow will flow into the inner cavity through the gap of the sheet metal and flow along the direction of the A-pillar. The flowing airflow will produce a whistling phenomenon, which in turn generates noise in the vehicle cockpit, forming the NVH (Noise, Vibration, Harshness) performance of the vehicle.

[0003] In the prior art, a barrier is usually provided in the inner cavity to isolate the inner cavity, thereby blocking the flow of gas and achieving the effect of eliminating the whistling of the airflow. However, it is difficult to install and assemble the barrier in the inner cavity. If the side outer panel and the upper inner panel of the A-pillar have been fastened and fixed as a whole, it is difficult to set the barrier in the inner cavity afterwards. Before fastening the side outer panel and the upper inner panel of the A-pillar, the barrier is pre-installed on the side outer panel or the upper inner panel of the A-pillar, and then the side outer panel and the upper inner panel of the A-pillar are fastened together. In this case, there is a gap between the barrier and the inner wall of the inner cavity, resulting in a poor sealing effect. For example, in the traditional sound insulation strip solution, the strip installed in the inner cavity is easy to fall off, affecting the sealing effect. Utility Model Content

[0004] In view of this, the utility model aims to provide an A-pillar inner cavity sealing structure to improve the blocking and sealing effect of the inner cavity of the A-pillar.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A sealing structure for an inner cavity of an A-pillar comprises a barrier member preinstalled in the inner cavity of the A-pillar, the barrier member being used to separate the inner cavity into two parts; the barrier member comprises a sleeve arranged along the length direction of the A-pillar, and a foaming unit arranged outside the sleeve; the foaming unit is provided with a foam body capable of foaming and expanding under heat, and the expanded foam body can form a seal between the sleeve and the inner wall of the inner cavity.

[0007] Furthermore, the foaming unit includes a plurality of plywood panels arranged in accordance with the cross-sectional shape of the inner cavity; the sleeve is arranged to penetrate each of the plywood panels, and a space for filling the foam body is defined between adjacent plywood panels, and the expanded foam body can form a seal for the gap between the plywood panels and the inner wall of the inner cavity.

[0008] Furthermore, a gap between the laminated board and the inner wall of the inner cavity is greater than 3 mm; and / or a thickness of the laminated board and the foam body is greater than 1.5 mm.

[0009] Furthermore, the foam body is made of EVA; and / or the laminated board and the sleeve are integrally injection-molded using a thermoplastic resin material.

[0010] Furthermore, a cover plate for sealing the sleeve is provided at one end of the sleeve facing the front of the vehicle, and an end of the sleeve facing the rear of the vehicle is constructed as a bell mouth.

[0011] Furthermore, the cover plate is connected to the end of the sleeve in a flippable manner, and a buckle is provided on the sleeve; the cover plate flipped to a closed state is clamped on the buckle to form a blockage for the sleeve.

[0012] Furthermore, the cover plate is connected to the outer wall on one side of the sleeve end through a connecting rib, and the buckle is arranged on the outer wall on the other side of the sleeve end; the buckle extends toward the outer side of the end face of the sleeve and is bent, and the cover plate flipped to a closed state is clamped between the buckle and the end face to form a cover for the end face.

[0013] Furthermore, the end surface is arranged to be inclined relative to the axis of the sleeve.

[0014] Furthermore, the A-pillar includes a side outer panel and an A-pillar upper inner panel that is buckled on the inner side of the side outer panel, and the inner cavity is formed between the side outer panel and the A-pillar upper inner panel; a mounting hole is opened on the A-pillar upper inner panel, and a clip is provided on the blocking member, and the clip is clamped in the mounting hole.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The A-pillar inner cavity sealing structure of the utility model can effectively block the flow of air in the inner cavity by arranging a barrier in the inner cavity of the A-pillar so as to divide the inner cavity into two parts; and the barrier adopts a pre-installed sleeve, and a foaming unit is arranged outside the sleeve, so that the barrier can be pre-installed on sheet metal parts such as the side outer panel of the A-pillar or the upper inner panel of the A-pillar, and with the help of the subsequent painting and baking process of the A-pillar assembly, the foam body in the foaming unit located outside the sleeve is heated and expanded, so as to completely seal and isolate the gap between the barrier and the inner wall of the inner cavity, thereby achieving the purpose of improving the blocking and sealing effect of the inner cavity of the A-pillar.

[0017] At the same time, the sunroof drip pipe can be conveniently installed by utilizing the installation hole formed inside the sleeve to meet the need of laying the sunroof drip pipe inside the A-pillar of a vehicle with a sunroof.

[0018] In addition, multiple plywood sheets are arranged in the barrier, and spaces for filling the foam body can be defined between adjacent plywood sheets, which facilitates the filling and arrangement of the foam body; at the same time, by arranging a cover plate at one end of the sleeve, when the vehicle does not need to arrange a sunroof drip pipe, the sleeve installation hole can be blocked by the cover plate to ensure the blocking effect of the barrier. Therefore, it is beneficial to improve the application scope of the A-pillar inner cavity sealing structure and can meet the internal blocking and sealing needs of the A-pillar of different models.

[0019] Another object of the present invention is to provide a vehicle, on which the A-pillar inner cavity sealing structure of the present invention is provided. The vehicle of the present invention has the technical advantages possessed by the A-pillar inner cavity sealing structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention. The directional terms such as front and back, top and bottom involved therein are only used to indicate relative positional relationships and do not constitute improper limitations on the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the side frame where the A-pillar inner cavity sealing structure according to the embodiment of the utility model is located;

[0022] Figure 2 for Figure 1 The schematic diagram of the structure of the side frame shown in another perspective;

[0023] Figure 3 for Figure 2 An exploded view of the side frame shown;

[0024] Figure 4 This is a schematic diagram of the internal structure of the A-pillar according to an embodiment of the utility model after a portion of the side outer panel is hidden;

[0025] Figure 5 for Figure 4 A partial enlarged view of the part shown in B;

[0026] Figure 6 for Figure 5 Schematic diagram of the split structure of the A-pillar upper inner panel and the barrier shown in ;

[0027] Figure 7 for Figure 1 A schematic diagram of the cross-sectional structure of the portion indicated by AA;

[0028] Figure 8 This is a schematic diagram of the structure of the A-pillar according to an embodiment of the utility model from a side perspective inside the vehicle;

[0029] Fig. 9 for Figure 8 The structure diagram of the part shown in C in the middle is after the upper inner panel of the A-pillar is hidden;

[0030] Fig.10 This is a schematic diagram of the structure of the barrier member according to an embodiment of the utility model;

[0031] Fig.11 for Fig.10 Schematic diagram of the cross-sectional structure of the part indicated by DD.

[0032] Description of reference numerals:

[0033] 1. A-pillar; 10. Inner cavity; 11. Side outer panel; 12. A-pillar upper inner panel; 120. Mounting hole; 13. Lining plate; 14. Reinforcement plate; 2. B-pillar;

[0034] 3. Barrier; 30. Plywood; 301. Front plate; 302. Back plate; 31. Foam; 32. Sleeve; 320. Through hole; 321. Bell mouth; 322. End face; 33. Cover plate; 330. Buckle; 331. Connecting rib; 34. Clip. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0036] In the description of the present invention, it should be stated that if there are terms indicating orientation or positional relationship such as "up, down, left, right, front, back, inside, outside", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. Taking the vehicle described in the present invention as an example, the orientation words such as "up, down, left, right, front, back" used in the embodiments are defined based on the up and down direction (also known as the height direction), the left and right direction (also known as the width direction) and the front and back direction (also known as the length direction) of the vehicle. Specifically, as shown in the drawings, the X direction is the front and back direction of the vehicle, wherein the side to which the arrow points is "front", and the opposite is "back". The Y direction is the left and right direction of the vehicle, wherein the side to which the arrow points is "left", and the opposite is "right". The Z direction is the up and down direction of the vehicle, wherein the side to which the arrow points is "up", and the opposite is "down". “Inside” and “outside” are defined based on the contour of the corresponding components. For example, “inside” and “outside” are defined based on the contour of a vehicle, with the side of the vehicle contour close to the middle of the vehicle being “inside” and the opposite being the case being “outside”.

[0037] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0039] Embodiment 1

[0040] This embodiment relates to an A-pillar inner cavity sealing structure, which can improve the blocking and sealing effect of the inner cavity 10 of the A-pillar 1; an exemplary structure thereof is as follows Figure 1 , Figure 2 and Figure 3 shown.

[0041] In general, the A-pillar inner cavity sealing structure includes a barrier 3 pre-installed in the inner cavity 10 of the A-pillar 1, and the barrier 3 is used to separate the inner cavity 10 into two parts. The barrier 3 includes a sleeve 32 arranged along the length direction of the A-pillar 1, and a foaming unit arranged outside the sleeve 32; the foaming unit is provided with a foam body 31 that can be heated and expanded, and the expanded foam body 31 can form a seal between the sleeve 32 and the inner wall of the inner cavity 10.

[0042] It should be pointed out that based on the above-mentioned overall design concept, the technical solution of the utility model can adopt a variety of different specific implementation structures, forms or configuration sequences. For example, the above-mentioned foaming unit can be a filling groove integrally formed on the outside of the sleeve 32, and the foam body 31 filled in the filling groove, or two plywood panels 30 can be arranged on the outside of the sleeve 32, and the foam body 31 can be filled in the space defined between the two plywood panels 30; in short, the foaming unit can form a restricted space, which only allows the foam body 31 to expand toward the inner wall direction of the inner cavity 10 when foaming and expanding. For the parts required for the implementation of the overall solution but not involved in the above-mentioned overall setting, reasonable and flexible design can be made with reference to the mature setting means in the field, the actual situation during implementation, etc. The specific implementation scheme described below in this embodiment is only a better one of the many schemes that can be formed by the above-mentioned various combinations and their changes. In actual implementation, those skilled in the art can make flexible adjustments and improvements based on the actual situation. Obviously, the many schemes that can be formed by the above-mentioned various specific forms of combination and its changes, as well as the specific implementation scheme of this embodiment, are all within the scope of protection of the utility model.

[0043] Regarding the specific pre-installed form of the barrier member 3 in the inner cavity 10, there are of course a variety of different structural solutions to choose from. Figure 5 and Figure 6 As shown, the A-pillar 1 includes a side outer panel 11 and an A-pillar upper inner panel 12 that is buckled on the inner side of the side outer panel 11, and an inner cavity 10 is formed between the side outer panel 11 and the A-pillar upper inner panel 12. Two mounting holes 120 are provided on the A-pillar upper inner panel 12, and two clips 34 are provided on the blocking member 3, which are clamped in the mounting holes 120; thus, the blocking member 3 can be pre-fixed on the A-pillar upper inner panel 12. Afterwards, when the A-pillar upper inner panel 12 and the side outer panel 11 are assembled, the blocking member 3 will be fixed at a set position in the inner cavity 10. In this embodiment, the mounting hole 120 is a round hole with a diameter of 7.5 mm; the head diameter of the clip 34 is slightly larger than the diameter of the mounting hole 120, and when the clip 34 is inserted into the mounting hole 120, its head passes through the mounting hole 120 and is left on the other side of the A-pillar upper inner panel 12.

[0044] In addition, if Figure 3 As shown, the blocking member 3 is preferably arranged at the middle and lower part of the upper section of the A-pillar 1 (the part between the roof and the lower cross beam of the front windshield) to avoid the reinforcing plate 14 in the inner cavity 10. In this way, the blocking member 3 and the reinforcing plate 14 are arranged in sequence from front to back, and the blocking member 3 is closer to the front end of the upper section of the A-pillar 1, which can block the airflow entering from the front end earlier.

[0045] Based on the fact that the A-pillar 1 is assembled by snapping together the side outer panel 11 and the upper inner panel 12 of the A-pillar, by opening a mounting hole 120 on the upper inner panel 12 of the A-pillar and setting a clip 34 on the barrier 3, the barrier 3 can be conveniently pre-clamped onto the upper inner panel 12 of the A-pillar, and then the upper inner panel 12 of the A-pillar and the side outer panel 11 are snapped together and assembled, and the whole assembly process is simple and quick. In addition, in order to improve the overall structural strength of the A-pillar 1, a lining plate 13 and a reinforcing plate 14 are also lined in the inner cavity 10. The lining plate 13 is stacked on the side outer panel 11, and its length is basically the same as that of the upper inner panel 12 of the A-pillar. It extends from the middle position of the A-pillar 1 to the upper rear of the vehicle, and its end is close to the position where the top of the B-pillar 2 is located. The reinforcing plate 14 is arranged in the inner cavity 10 behind the barrier 3 to play a role in reinforcing the structure of the A-pillar 1.

[0046] like Figures 4 to 7 As shown, in this embodiment, the foaming unit includes a plurality of plywood sheets 30 arranged in accordance with the cross-sectional shape of the inner cavity 10; the sleeve 32 is arranged through each plywood sheet 30, and a space for filling the foam body 31 is defined between adjacent plywood sheets 30, and the expanded foam body 31 can form a seal for the gap between the plywood sheet 30 and the inner wall of the inner cavity 10. Preferably, two plywood sheets 30 are arranged at intervals, and the two plywood sheets 30 are arranged in the middle of the sleeve 32, so as to be away from the end of the sleeve 32, so as to prevent the foam body 31 filled between the two plywood sheets 30 from expanding and overflowing to the end of the sleeve 32 and blocking the sleeve 32.

[0047] The gap between the laminated board 30 and the inner wall of the inner cavity 10 of this embodiment is more than 3mm, so that a certain gap is retained between the laminated board 30 and the inner wall of the inner cavity 10, which is convenient for pre-installation of the barrier 3 in the inner cavity 10, and can prevent the barrier 3 from affecting the side outer panel 11 and the upper inner panel 12 of the A-pillar when they are fastened and fixed. Before heating and expansion, the edge of the foam 31 is flush with the edge of the laminated board 30. In order to improve the situation where the foam 31 expands and overflows to the outside of the two laminated boards 30, it is preferred to set the gap between the laminated board 30 and the inner wall of the inner cavity 10 between 3mm-5mm, while ensuring the smooth flow of liquid in the inner cavity 10 during the electrophoresis process of the A-pillar 1, and reducing the degree of expansion of the foam 31 through the above gap and overflowing to the outside of the two laminated boards 30. Of course, the foam 31 can be set with zero fit to the sheet metal at the sheet metal joint.

[0048] The thickness of the laminated board 30 and the foam body 31 is preferably set to be above 1.5 mm; controlling the laminated board 30 and the foam body 31 to be above a reasonable thickness can not only ensure the overall structural strength and supporting strength of the laminated board 30, but also ensure that the foam body 31 can completely block the gap between the laminated board 30 and the inner wall after foaming and expansion.

[0049] Based on the above overall settings, Figures 8 to 11 As shown, the sleeve 32 of this embodiment passes through the two plywood panels 30 along the length direction of the A-pillar 1; the two plywood panels 30 are specifically a front panel 301 and a rear panel 302, both of which are fixedly connected to the outer wall of the sleeve 32. Moreover, a cover plate 33 for blocking the sleeve 32 is provided at one end of the sleeve 32. The sleeve 32 passing through the two plywood panels 30 along the length direction of the A-pillar 1 is provided in the barrier 3. The sunroof dripping pipe can be conveniently installed by using the through hole 320 formed inside the sleeve 32 to meet the need of laying a sunroof dripping pipe inside the A-pillar 1 of a vehicle with a sunroof; at the same time, by providing a cover plate 33 at one end of the sleeve 32, when there is no need to arrange a sunroof dripping pipe in the vehicle, the through hole 320 of the sleeve 32 can be blocked by the cover plate 33 to ensure the blocking effect of the barrier 3. Therefore, the above design is conducive to improving the application scope of the A-pillar inner cavity sealing structure, and can meet the internal blocking and sealing needs of the A-pillar 1 of different vehicle models (sunroof models and non-sunroof models); there is no need to distinguish the configurations and design two structural schemes. If there is no need to install a sunroof drip pipe, just close the cover plate 33; when it is necessary to install a sunroof drip pipe, start from the roof and install the sunroof drip pipe forward along the length direction of the inner cavity 10, and the end of the sunroof drip pipe passes through the other end of the sleeve 32 (the end of the bell mouth 321 described below) into the installation hole 320. When the end of the sunroof drip pipe reaches the cover plate 33, it will push the cover plate 33 open, thereby passing through the barrier 3.

[0050] There are many different choices for the material of the barrier 3. In this embodiment, the foam 31 is made of EVA (ethylene-vinyl acetate copolymer); the laminate 30 and the sleeve 32 are integrally injection molded with a thermoplastic resin material. There are many kinds of thermoplastic resin materials, for example, PA66 plastic can be used.

[0051] The expansion rate can be effectively controlled by adjusting the amount of foaming agent when using ethylene-vinyl acetate copolymer as foam plastic, and ethylene-vinyl acetate copolymer foam plastic has the characteristics of good elasticity, light weight, strong toughness and low shrinkage rate. The foam body 31 is pre-filled between the front plate 301 and the rear plate 302. When the A-pillar 1 is painted and baked, the foam body 31 is heated and expanded. The baking conditions meet (140±5)℃, and the baking time is about 20 minutes. The foaming rate of the foam body 31 can reach more than 900%. After foaming, the foam body 31 material is bonded to the inner wall of the inner cavity 10, forming a good sealing and fixing effect between the laminated board 30 and the inner wall of the inner cavity 10.

[0052] In addition, based on the above-mentioned setting of the barrier 3, preferably, the cover plate 33 of this embodiment is set at the end of the sleeve 32 facing the front of the vehicle, and the end of the sleeve 32 facing the rear of the vehicle is configured as a trumpet 321. The end of the sleeve 32 facing the rear of the vehicle is configured as a trumpet shape, which facilitates the smooth insertion of the sunroof drip pipe into the insertion hole 320 of the sleeve 32 when laying the sunroof drip pipe, and meets the assembly requirements of the sunroof drip pipe from the roof to the bottom. Based on the situation that the laminated board 30 and the sleeve 32 are integrally injection molded, the plate thickness of the laminated board 30 and the wall thickness of the sleeve 32 are preferably set to be above 1.5 mm, for example, the plate thickness and the wall thickness are both set to 2 mm.

[0053] One end of the sleeve 32 is configured as a bell mouth 321, such as Fig.10 As shown, two clips 34 for pre-installing the barrier 3 can be provided, one is provided on the bell mouth 321 and is provided near the open end of the bell mouth 321; the other clip 34 is provided on the end surface of the plywood 30; this makes it easier to smoothly complete the clamping of the barrier 3 on the upper inner plate of the A-pillar. The two plywood 30 are provided close to the bell mouth 321 to be as far away as possible from the end where the cover plate 33 is located, to prevent the expanded and overflowed foam 31 from reaching the cover plate 33 and affecting the smooth opening of the cover plate 33.

[0054] Of course, the specific location of the cover plate 33 can be flexibly adjusted; for example, the cover plate 33 can be set in the middle of the sleeve 32, or the cover plate 33 can be set at the end of the sleeve 32. Fig.10 and Fig.11 As shown, in this embodiment, the cover plate 33 is connected to the end of the sleeve 32 in a flippable manner, and a buckle 330 is provided on the sleeve 32; the cover plate 33 flipped to a closed state is snapped on the buckle 330, thereby forming a blockage for the sleeve 32.

[0055] There are also many options for the connection form of the cover plate 33 on the sleeve 32; for example, a hinge pin can be used to hinge the cover plate 33 so as to facilitate the flipping and swinging of the cover plate 33. However, in this embodiment, the cover plate 33 is connected to the outer wall on one side of the end of the sleeve 32 through the connecting rib 331, and the buckle 330 is arranged on the outer wall on the other side of the end of the sleeve 32. The buckle 330 extends and bends toward the outside of the end face 322 of the sleeve 32, so that a clamping space is formed between the bent part of the buckle 330 and the end face 322 of the sleeve 32. The edge of the cover plate 33 flipped to the closed state will be clamped into the above-mentioned clamping space, that is, one end of the cover plate 33 is connected to the connecting rib 331, and the other end is clamped between the buckle 330 and the end face 322, so that the cover plate 33 is firmly sealed on the end face 322 to form a blockage of the sleeve 32.

[0056] The cover plate 33 is connected to the outer wall of the end of the sleeve 32 by a connecting rib 331. By thinning the connecting rib 331, the cover plate 33 can be easily flipped and swung relative to the sleeve 32, so that the cover plate 33 can be well sealed on the end surface 322 of the sleeve 32; at the same time, by providing a buckle 330 on the other side of the end of the sleeve 32, the cover plate 33 can be clamped in the covering position. When the cover plate 33 needs to be opened, the end position of the buckle 330 can be moved to release the cover plate 33, thereby flipping it open.

[0057] The thickness of the cover plate 33 and the specific structural dimensions of the connecting rib 331 can be flexibly designed within a reasonable range. In this embodiment, the thickness of the cover plate 33 is 2 mm; the length of the connecting rib 331 is 5.2 mm and the thickness is 1 mm. The gap size of the clamping space formed between the bent part of the buckle 330 and the end face 322 is 3.2 mm; when one end of the cover plate 33 is clamped into the clamping space, the clamping amount between the cover plate 33 and the buckle 330 is about 0.44 mm.

[0058] In addition, Fig.11 As shown, the end surface 322 of this embodiment is inclined relative to the axis of the sleeve 32. The end surface 322 is inclined, which helps to reduce the flipping and swinging angle of the cover plate 33, thereby reducing the deformation requirements for the connecting rib 331 when the cover plate 33 is flipped; at the same time, when the skylight drip pipe is passed through, the end of the skylight drip pipe is also easier to push the cover plate 33 outward from the inside of the sleeve 32.

[0059] In summary, the A-pillar inner cavity sealing structure of the present embodiment can effectively block the flow of air in the inner cavity 10 by arranging a barrier 3 in the inner cavity 10 of the A-pillar 1 so as to divide the inner cavity 10 into two parts; and the barrier 3 is pre-installed, which is convenient for pre-installing the barrier 3 on sheet metal parts such as the side outer panel 11 of the A-pillar 1 or the upper inner panel 12 of the A-pillar, and by means of the subsequent coating and baking process of the A-pillar 1 assembly, the foam 31 located between the two plywood panels 30 is heated and foamed and expanded, so as to completely seal and isolate the gap between the barrier 3 and the inner wall of the inner cavity 10, thereby achieving the purpose of improving the blocking and sealing effect of the inner cavity 10 of the A-pillar 1.

[0060] Embodiment 2

[0061] This embodiment relates to a vehicle, on which the A-pillar inner cavity sealing structure provided in the first embodiment is provided.

[0062] In the A-pillar inner cavity sealing structure of the utility model, combined with the arrangement of the peripheral parts installation points on the A-pillar 1, the barrier member 3 can be set at a suitable position to reasonably avoid the installation points of the peripheral parts to prevent the foam body 31 from affecting the surrounding installation points during foaming and expansion; when the foaming rate of the foaming material is 900%, it is generally required that the spacing size of the peripheral parts installation holes from the foam body 31 should be more than 15mm.

[0063] On the barrier 3, two plywood sheets 30 are designed to define the foaming space, which can limit the foaming expansion range of the sleeve 32; except for the mold cost required for the integrally formed plywood sheets 30 and sleeve 32, there is no need to develop additional inspection tools and fixtures, and it is not limited by the layout space of the injection gun.

[0064] Moreover, before the foam body 31 is foamed and expanded, the barrier 3 can be pre-installed on the A-pillar upper inner plate 12 as a sealing structural component, which will not hinder the overall assembly of the A-pillar 1; the design structure is simple, transportation is convenient, and on-site production operations are more convenient. After the foam body 31 is foamed and expanded to achieve sealing and isolation, compared with the traditional sound insulation strip solution, since the barrier 3 has been pre-clamped in the installation hole 120 of the A-pillar upper inner plate 12, the installation position accuracy is high, there is no risk of the strip falling off, and the sealing effect is better.

[0065] The above is only a preferred embodiment of the present invention. The detailed explanation of the configuration, the examples of the specific structural setting, or the description of the assembly connection method, etc., are all for the purpose of full disclosure so that those skilled in the art can better implement the present invention, and are not intended to limit the scope of protection of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An A-pillar inner cavity sealing structure, characterized in that: It comprises a barrier (3) pre-installed in an inner cavity (10) of an A-pillar (1), wherein the barrier (3) is used to separate the inner cavity (10) into two parts; The barrier (3) comprises a sleeve (32) arranged along the length direction of the A-pillar (1), and a foaming unit arranged outside the sleeve (32); the foaming unit is provided with a foam body (31) capable of foaming and expanding under heat, and the expanded foam body (31) can form a seal between the sleeve (32) and the inner wall of the inner cavity (10).

2. The A-pillar inner cavity sealing structure according to claim 1, characterized in that: The foaming unit comprises a plurality of plywood sheets (30) arranged in accordance with the cross-sectional shape of the inner cavity (10); the sleeve (32) is arranged to penetrate each of the plywood sheets (30), and a space for filling the foam body (31) is defined between adjacent plywood sheets (30); the expanded foam body (31) can form a seal for a gap between the plywood sheets (30) and the inner wall of the inner cavity (10).

3. The A-pillar inner cavity sealing structure according to claim 2, characterized in that: The gap between the laminated board (30) and the inner wall of the inner cavity (10) is greater than 3 mm; And / or, the thickness of the laminated board (30) and the foam (31) are both above 1.5 mm.

4. The A-pillar inner cavity sealing structure according to claim 2, characterized in that: The foamed body (31) is made of EVA; And / or, the laminated plate (30) and the sleeve (32) are integrally injection-molded using a thermoplastic resin material.

5. The A-pillar inner cavity sealing structure according to claim 2, characterized in that: The end of the sleeve (32) facing the front of the vehicle is provided with a cover plate (33) for sealing the sleeve (32), and the end of the sleeve (32) facing the rear of the vehicle is constructed as a bell mouth (321).

6. The A-pillar inner cavity sealing structure according to claim 5, characterized in that: The cover plate (33) is connected to the end of the sleeve (32) in a flippable manner, and a buckle (330) is provided on the sleeve (32); the cover plate (33) flipped to a closed state is snapped onto the buckle (330) to form a blockage for the sleeve (32).

7. The A-pillar inner cavity sealing structure according to claim 6, characterized in that: The cover plate (33) is connected to the outer wall on one side of the end of the sleeve (32) through a connecting rib (331), and the buckle (330) is provided on the outer wall on the other side of the end of the sleeve (32); The buckle (330) extends toward the outside of the end surface (322) of the sleeve (32) and is bent, and the cover plate (33) flipped to a closed state is clamped between the buckle (330) and the end surface (322), thereby forming a cover for the end surface (322).

8. The A-pillar inner cavity sealing structure according to claim 7, characterized in that: The end surface (322) is arranged to be inclined relative to the axis of the sleeve (32).

9. The A-pillar inner cavity sealing structure according to any one of claims 1 to 7, characterized in that: The A-pillar (1) comprises a side outer panel (11) and an A-pillar upper inner panel (12) buckled on the inner side of the side outer panel (11), and the inner cavity (10) is formed between the side outer panel (11) and the A-pillar upper inner panel (12); The A-pillar upper inner plate (12) is provided with a mounting hole (120), and the blocking member (3) is provided with a clip (34), and the clip (34) is clamped in the mounting hole (120).

10. A vehicle, characterized in that: The vehicle is provided with the A-pillar inner cavity sealing structure according to any one of claims 1 to 9.

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