Yes
With the development of the automobile industry, people have higher and higher requirements for the "safety, comfort and environmental protection" of cars. , vibration isolation, anti-corrosion, anti-noise” standard requirements are also constantly improving. At present, automotive engineering and technical personnel have upgraded the sound and vibration isolation technology in the vehicle's shock absorbers, sound insulation pads, interior sound insulation, vibration isolation carpets, body glass, and roofs, etc., so that the interior of the car's cabin The vibration and noise have been effectively improved. However, the cavity channels in the body structure will also generate and transmit vibration noise, and this technical problem has not been well solved. The production process of the car body is to stamp the metal plate with a mold and then weld the inner plate, reinforcement plate, outer plate and other automobile plate metals together. Therefore, there will generally be necessary gaps and spaces between the inner panels, reinforced panels, and outer panels, including the body floor beams, A, B, C, and D pillars, rear wheel covers, ceilings, and upper and lower front panels. Cavities will be formed in areas such as the roof, the upper part of the rear fender and the four door panels. In particular, the body reinforcements A, B, C, and D uprights and the longitudinal beams on both sides of the bottom form hollow columnar structural parts. The hollow structures of these columns and longitudinal beams effectively ensure the strength and rigidity of the body structure, so the cavity state in the body structure is a must. But the cavity of this body structure also forms a special channel for transmitting external noise and vibration. Long metal plates such as the roof and longitudinal beams of the car body will make noise due to structural distortion and vibration when passing over road ridges; when the vehicle is traveling at high speed, it will also make a loud noise on the car body due to external wind pressure and wind resistance. The road sand and gravel will also cause impact sounds to the car body during movement; the highest vibration frequency generated during movement will cause vibration and sound to the outer panels of the car body. These noises and vibrations will be quickly transmitted within the body and in the cavities between the outer panels, thereby transmitting the noise and vibrations to the cabin of the car, affecting the comfort of the drivers and passengers.
Content of the Invention The purpose of this utility model is to solve the problems existing in the above-mentioned prior art and provide a device installed in the car that can close the body cavity and effectively improve the vibration and noise in the car cabin. The cavity inside the upper part of the A-pillar separates the first block. In order to achieve the above purpose, the utility model adopts the following technical solution: a cavity sound insulation block installed on the inside of the upper part of the A-pillar of the car, including a high-temperature-resistant bracket and a foam body connected to the bracket that can foam and expand after being heated; It has a cross-section similar to the inner cavity of the upper part of the A-pillar of the car and leaves a gap with the surrounding body panels of the corresponding cross-section. There is an elastic buckle on one side of the bracket for snapping into the body panel sheet metal and for The stop and pre-tightening block prevent the buckle from being over-locked. The elastic buckle is integrated with the stop and pre-tightening block. The elastic buckle is composed of two elastic pieces arranged opposite each other. Each elastic piece is composed of a connecting piece connected to the bracket and a cone-shaped body arranged at the top of the connecting piece; there are two stops and pre-tightening blocks. , respectively connected to the two connecting pieces. The two stops and the pretensioning blocks connected to the two connecting pieces respectively extend obliquely toward the outside and front. By combining the reasonable and ideal operating procedures in the automobile manufacturing process, the body cavity sound insulation block of the present utility model is installed in the body cavity inside the upper part of the A-pillar of the car. After the body in white has been pickled, neutralized, purified, Phosphating, after the first coat of paint, it is baked in a paint baking oven. After being exposed to high temperatures of 160 to 190°C for a certain period of time in the furnace, the foam body completes foaming and bonding. The sound insulation block is closely bonded with the body panel inside the upper part of the A-pillar of the car, which can effectively seal the cavity channel there. Block, achieve full sealing, thereby blocking the vibration source and noise generated by the A-pillar and transmitted through the body cavity, to further improve and enhance the vibration isolation, sound insulation, vibration reduction, and noise reduction in the car cabin. At the same time, after the body cavity sound insulation blocks are foamed and bonded in the body cavity, the strength of the body is further strengthened, which optimizes the body structure and the body's collision resistance, improving the comfort and safety of the car. Important improvement.
Fig. 1 is a schematic three-dimensional structural diagram of the cavity sound insulation block installed inside the upper part of the A-pillar of the car according to the present invention; Fig. 2 is a schematic structural diagram of the top view of the sound insulation block shown in Fig. 1.
Specific Embodiments
See Figure 1, and see Figure 2 together. The cavity sound insulation block of the present invention is installed on the inside of the upper part of the A-pillar of the car, and includes a high-temperature-resistant bracket I and a The foam body 2 on the bracket 1 can be foamed and expanded after being heated; the bracket 1 has a shape similar to the cross-section of the inner cavity of the upper part of the A-pillar of the car and leaves a gap with the peripheral body panel of the corresponding cross-section. The side is provided with an elastic buckle 3 for snapping into the sheet metal of the body panel and a stop and pre-tightening block 4 for preventing the buckle from being over-locked. The elastic buckle 3 is integrated with the stop and pre-tightening block 4. The elastic buckle 3 in the utility model is composed of two elastic pieces arranged oppositely. Each elastic piece is composed of a connecting piece connected to the bracket and a cone-shaped body arranged at the top of the connecting piece. There are two stops and pre-tightening blocks 4*** in the utility model, which are respectively connected to the two connecting pieces and extend obliquely toward the outside and front respectively. When the utility model is installed, the sound insulation block parts are clamped into the square hole of the sheet metal through the elastic buckle 3. Under the action of the stop and the pre-tightening block 4, the parts can be effectively prevented from failing due to excessive clamping. At the same time, Because the stop position and the pre-tightening block 4 are squeezed, a reaction force will be exerted on the buckle, thereby firmly fixing the buckle in the square hole of the sheet metal, which can effectively prevent the parts from rotating within the effective section plane, and It eliminates the need to arrange anti-rollover and stop structures for parts, which is very practical.
Claim 1. A cavity sound insulation block installed inside the upper part of the A-pillar of a car, including a high-temperature-resistant bracket and a foam body connected to the bracket that can foam and expand after being heated; the bracket has a structure similar to that of the car The inner cavity of the upper part of the A-pillar has a similar cross-section shape and leaves a gap with the peripheral body panel of the corresponding cross-section. It is characterized in that: an elastic buckle for snapping into the body panel sheet metal is provided on one side of the bracket. The elastic buckle is integrated with the stop and pre-tightening block to prevent the buckle from being over-locked.
2. The cavity sound insulation block installed on the inside of the upper part of the A-pillar of the car according to claim 1, characterized in that: the elastic buckle is composed of two oppositely arranged elastic pieces, each of which is elastic. The pieces are respectively composed of a connecting piece connected to the bracket and a cone-shaped body arranged at the top of the connecting piece; there are two stop positions and a pre-tightening block, which are respectively connected to the two connecting pieces.
3. The cavity sound insulation block installed on the inside of the upper part of the A-pillar of the car according to claim 2, characterized in that: the two stops and the pre-tightening block connected to the two connecting pieces Stretch out obliquely to the outside and front respectively.
Patent summary: A cavity sound insulation block installed on the inside of the upper part of the A-pillar of a car, including a high-temperature-resistant bracket and a foam body connected to the bracket that can foam and expand after being heated; the bracket has the same function as the A-pillar of the car. The upper inner cavity has a similar cross-section shape and leaves a gap with the peripheral body panel of the corresponding cross-section. It is characterized in that an elastic buckle is provided on one side of the bracket for snapping into the body panel sheet metal and for preventing jamming. The stop position and pre-tightening block of the buckle are excessively stuck, and the elastic buckle is integrated with the stop position and pre-tightening block. After the utility model is pre-placed in the body cavity inside the upper part of the A-pillar of the car and is foamed and expanded, it can be tightly bonded with the body panel there to effectively block the cavity channel there and achieve further improvement. And the purpose of improving vibration isolation, sound insulation, vibration reduction and noise reduction in the car cabin.