Sound insulation rubber block structure of inner cavity under A column of automobile

Abstract

The utility model discloses an inner cavity sound insulation rubber block structure under an automobile column A. The inner cavity sound insulation rubber block structure under the automobile column A comprises a framework, a foaming body is arranged on the edge of the framework, a buckle and a first supporting block are arranged on one side of the framework, and the first supporting block is located at the bottom of the framework. The structural strength of the buckle is improved, and the rubber block sealing effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of body cavity sound insulation rubber blocks. Specifically, the utility model relates to a structure of an inner cavity sound insulation rubber block under the A-pillar of an automobile. Background Technique

[0002] The body frame of an automobile usually adopts a steel plate structure to form a closed cavity. In order to prevent the turbulent flow of air inside the cavity from affecting NVH and the entry of external air flow into the vehicle and affecting the airtightness of the whole vehicle, it is necessary to arrange sound insulation rubber blocks in the side wall cavity. The sound insulation rubber blocks are pretreated such as electrophoresed during the painting of the white body in white, and foam after baking is completed, sealing and isolating the cavity section where they are located to achieve the effect of blocking air flow.

[0003] At present, some vehicle models adopt an integrated door ring structure for the side wall, integrating the A-pillar, B-pillar, sill reinforcement plate, etc. into one body to achieve the purpose of fewer parts and vehicle body weight reduction, so as to conform to the development trend of vehicle lightweight. The lower part of the traditional vehicle A-pillar and the sill body form an "L-shaped" cavity structure, and the rubber block is fixed to the bottom of the cavity (i.e., the sill body) through 2 buckles. The integrated door ring structure forms a cavity structure with a smaller upper part and a larger lower part under the A-pillar, and the cavity penetrates up and down, and the rubber block is arranged at the corner of this cavity structure.

[0004] The process of the white body entering the pretreatment liquid is similar to the process of a ship launching into the water. At this time, there is a risk that the sound insulation rubber block will be washed down and collapsed, the limiting structure will fail, and the foam of the sound insulation rubber block will not be ideal and the cavity isolation will fail.

[0005] The cavity structure has a smaller upper part and a larger lower part, and the rubber block is arranged very close to the corner of the cavity. The layout point of the inner sound insulation rubber block under the A-pillar is limited by the cavity, the distance between the buckles is too close, and as the cross-sectional area of the cavity gets larger and larger towards the bottom, the plane of the rubber block is very large. The distance from the farthest point of the rubber block to the buckle is too far. After the farthest point is stressed, it will increase the multiple of the stress and feedback it to the buckle, which requires a very high strength for the buckle, and the buckle is easy to break, and the clamping and limiting function of the buckle cannot meet the design requirements; the area of the rubber block is large, the strength of the buckle structure is insufficient, and the rubber block is fixed on the XZ plane. When the rubber block is directly impacted by the electrophoretic liquid or sags and tilts under the influence of gravity, the gap between the rubber block and the sheet metal increases, resulting in non-ideal foaming and thus affecting the sealing.

[0006] The utility model patent with the publication number of CN214775698U was published on November 19, 2021, with the name of a left-right universal two-color injection molded sound insulation rubber block, including a connecting block, a chute is arranged at the front end of the connecting block, and a rubber plate is fixedly connected to the bottom end of the connecting block, a connecting rubber block is fixedly connected to the front end of the rubber plate, an opening is arranged on the outer surface of the connecting rubber block, and a long column is fixedly connected to the outer surface of the connecting rubber block. This sound insulation rubber block also cannot solve the technical problems described above. Content of the Utility Model

[0007] The purpose of the present utility model is to provide an automotive A-pillar lower inner cavity sound insulation rubber block structure that can avoid the increase in the gap between the rubber block and the sheet metal, improve the strength of the buckle structure, and enhance the sealing effect of the rubber block in view of the deficiencies of the prior art.

[0008] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0009] The automotive A-pillar lower inner cavity sound insulation rubber block structure includes a skeleton, a foam body is provided at the edge of the skeleton, a buckle and a first support block are provided on one side of the skeleton, and the first support block is located at the bottom of the skeleton.

[0010] The buckle and the first support block are located on the same side of the skeleton. A second support block is provided on the opposite side of the first support block on the skeleton. The second support block is located at the upper end of the skeleton, and the end of the second support block is an inclined structure relative to the outer edge of the skeleton.

[0011] The buckle includes a first buckle and a second buckle, and a reinforcing rib is provided at the connection between the skeleton and the second buckle.

[0012] The first buckle is a square buckle, and the second buckle is a circular buckle.

[0013] Both the first support block and the second support block are provided in pairs.

[0014] A skeleton reinforcing rib is further provided on the skeleton, and the skeleton reinforcing rib is a strip structure.

[0015] Both ends of the skeleton are sharp structures.

[0016] A liquid leakage hole is provided in the middle of the skeleton.

[0017] The technical effect of the present utility model is as follows: By adopting the automotive A-pillar lower inner cavity sound insulation rubber block structure of the present utility model, the first support block can effectively prevent the rubber block from tilting and collapsing downward in the XY plane, resulting in an increase in the gap between the rubber block and the sheet metal, and ensuring the reliable air blocking of the rubber block; on the premise of ensuring that the rubber block does not tilt and collapse downward in the XY plane, the second support block can prevent the rubber block from being squeezed and damaged when the side wall and the lower vehicle body are assembled; the design of the reinforcing rib at the circular buckle enhances the hardness of the circular buckle, significantly improves the strength of the buckle structure, and will not be damaged or even broken during clamping and stress, preventing the situation of buckle fracture and failure. Description of the Drawings

[0018] This specification includes the following drawings, and the shown contents are respectively:

[0019] Figure 1 It is a structural schematic diagram of the automotive A-pillar lower inner cavity sound insulation rubber block structure of the present utility model;

[0020] Figure 2It is a schematic structural view of the sound insulation rubber block structure in the inner cavity under the A-pillar of the motor vehicle of the present utility model;

[0021] Figure 3 It is a schematic structural view of the sound insulation rubber block structure in the inner cavity under the A-pillar of the motor vehicle of the present utility model.

[0022] In the figure, the markings are: 1, the framework; 2, the foam body; 3, the first support block; 4, the second support block; 5, the buckle; 6, the first buckle; 7, the second buckle; 8, the reinforcing rib; 9, the framework reinforcing rib; 10, the liquid leakage hole. Specific embodiments

[0023] The following further elaborates in detail the specific embodiments of the present utility model by describing the embodiments with reference to the accompanying drawings, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and to facilitate its implementation.

[0024] As Figures 1 to 3 shown, the sound insulation rubber block structure in the inner cavity under the A-pillar of the motor vehicle includes a framework 1, with a foam body 2 provided at the edge of the framework 1, a buckle 5 and a first support block 3 provided on one side of the framework 1, and the first support block 3 is located at the bottom of the framework 1. The sound insulation rubber block is composed of an EVA foam body 2 and a PA66 nylon framework 1. The support blocks on the rubber block play a limiting role during the assembly of the rubber block to stabilize the posture of the rubber block, and the buckle 5 plays a role in clamping installation and limiting. The first support block 3 is provided at the bottom on one side of the framework 1, that is, below the buckle 5. When the buckle 5 is clamped, the first support block 3 contacts the sheet metal to support the rubber block. The first support block 3 has an interference fit of 0.5 mm with the sheet metal, avoiding the buckle 5 alone bearing the weight of the rubber block, effectively preventing the rubber block from tilting and collapsing downward in the XY plane, and preventing the XY plane of the rubber block from shifting downward after being flushed by pretreatment liquids such as electrophoresis liquid, eliminating the influence of gravity and electrophoresis liquid flushing on the gap between the rubber block and the sheet metal, and avoiding the increase in the gap between the rubber block and the sheet metal resulting in ineffective cavity partition due to unsatisfactory foaming.

[0025] As Figures 1 to 3 shown, the buckle 5 and the first support block 3 are located on the same side of the framework 1. A second support block 4 is provided on the opposite side of the framework 1 where the first support block 3 is located. The second support block 4 is located at the upper end of the framework 1, and the end of the second support block 4 is an inclined structure relative to the outer edge of the framework 1. The first support block 3 and the second support block 4 are respectively located on both sides of the framework 1. The end of the second support block 4 is an inclined structure, and the surface of the second support block 4 in contact with the sheet metal is inclined at a certain angle with the XZ plane. Such a design is to cooperate with the design of the first support block 3. Since the first support block 3 has an interference fit with the sheet metal, the rubber block will be deflected upward relative to the XY plane during assembly. When the rubber block assembly is completed, in order to prevent the second support block 4 from interfering with the sheet metal and squeezing the rubber block when the side wall and the lower vehicle body are combined, it is necessary to design it to be inclined towards the inner plate of the A-pillar.

[0026] As shown Figure 2 in the figure, the buckle 5 includes a first buckle 6 and a second buckle 7, and a reinforcing rib 8 is provided at the connection between the skeleton 1 and the second buckle 7. In order to avoid the situation that the buckle 5 breaks due to insufficient strength of the buckle 5, the reinforcing rib 8 is added to strengthen the circular buckle, which can bear the acting force feedback at the farthest point of the rubber block, effectively preventing the buckle 5 from breaking, thus ensuring the reliable air flow blocking performance of the rubber block and meeting the strength design requirements of the buckle 5 on the large-area rubber block. The reinforcing rib 8 is integrally injection-molded with the skeleton 1, and the design cost is low.

[0027] As shown Figure 2 in the figure, the first buckle 6 is a square buckle, and the second buckle 7 is a circular buckle. The buckle 5 is divided into a square buckle and a circular buckle, and the two are used in combination to achieve anti-misassembly design, ensure the correct assembly direction of the rubber block, simplify the installation process, improve the installation efficiency, can also adapt to different installation holes and design requirements, provide flexible installation options, have a uniform fixing effect, enhance the overall fixing effect of the rubber block, and prevent sagging and deformation.

[0028] As shown Figure 1 in the figure, both the first support block 3 and the second support block 4 are arranged in pairs. The above structure avoids the single-point support of the support block, and multiple support blocks play a planar support effect on the rubber block, preventing the rubber block from sagging.

[0029] As shown Figure 3 in the figure, a skeleton reinforcing rib 9 is also provided on the skeleton 1, and the skeleton reinforcing rib 9 is in a strip structure. The skeleton reinforcing rib 9 further improves the structural strength of the skeleton 1 and reduces the deformation of the skeleton 1.

[0030] As shown Figure 1 in the figure, both ends of the skeleton 1 are sharp structures. The sharp structures correspond to the contact parts of the A-pillar sheet metal and the side panel sheet metal when the combined side panel and the lower vehicle body are joined, so that the rubber block has a better sealing effect between the sheet metals.

[0031] As shown Figure 3 in the figure, a liquid leakage hole 10 is provided in the middle of the skeleton 1. The liquid leakage hole 10 is used for the flow of the electrophoresis liquid, and when water enters the A-pillar, it can drain the water to the sill body.

[0032] For the sound insulation rubber block structure in the lower inner cavity of the automotive A-pillar, the first support block 3 can effectively prevent the rubber block from tilting and collapsing downward in the XY plane, resulting in an increase in the gap between the rubber block and the sheet metal, ensuring the reliable air flow blocking of the rubber block; on the premise of ensuring that the rubber block does not tilt and collapse downward in the XY plane, the second support block 4 prevents the rubber block from being squeezed and damaged when the side panel and the lower vehicle body are joined; the design of the reinforcing rib 8 at the circular buckle enhances the hardness of the circular buckle, significantly improving the structural strength of the buckle 5, and it will not be damaged or even broken during clamping and stress, preventing the situation of the buckle 5 breaking and failing.

[0033] The above has made an exemplary description of the present utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above-mentioned methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model; or without improvement, the above-mentioned concept and technical solution of the present utility model are directly applied to other occasions, they are all within the protection scope of the present utility model.

Claims

1. A sound insulation rubber block structure for the inner cavity under the A-pillar of an automobile, characterized in that: It includes a framework (1), with a foam body (2) provided at the edge of the framework (1). A buckle (5) and a first support block (3) are provided on one side of the framework (1), and the first support block (3) is located at the bottom of the framework (1).

2. The sound insulation rubber block structure of the inner cavity under the A-pillar of the vehicle according to claim 1, wherein: The buckle (5) and the first support block (3) are located on the same side of the framework (1). A second support block (4) is provided on the opposite side of the framework (1) where the first support block (3) is located. The second support block (4) is located at the upper end of the framework (1), and the end of the second support block (4) is an inclined structure relative to the outer edge of the framework (1).

3. The sound insulation rubber block structure for the inner cavity under the A-pillar of an automobile according to claim 1 or 2, characterized in that: The buckle (5) includes a first buckle (6) and a second buckle (7), and a reinforcing rib (8) is provided at the connection between the framework (1) and the second buckle (7).

4. The sound insulation rubber block structure for the inner cavity under the A-pillar of the vehicle according to claim 3, characterized in that: The first buckle (6) is a square buckle, and the second buckle (7) is a circular buckle.

5. The sound insulation rubber block structure for the inner cavity under the A-pillar of the vehicle according to claim 2, wherein: Both the first support block (3) and the second support block (4) are provided in pairs.

6. The sound insulation rubber block structure for the inner cavity under the A-pillar of the vehicle according to claim 3, wherein: The framework (1) is further provided with a framework reinforcing rib (9), and the framework reinforcing rib (9) is a strip-shaped structure.

7. The sound insulation rubber block structure for the inner cavity under the A-pillar of an automobile according to claim 6, characterized in that: Both ends of the framework (1) are sharp structures.

8. The sound insulation rubber block structure for the inner cavity under the A-pillar of the vehicle according to claim 7, characterized in that: A liquid leakage hole (10) is provided in the middle of the framework (1).

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