With the development of automobile industry, people's requirements for safety, comfort and environmental protection of automobiles are getting higher and higher, and the standard requirements for "sound insulation, vibration isolation, corrosion prevention and noise prevention" of automobile cockpit are also constantly improving. At present, automobile engineers and technicians have upgraded the vehicle shock absorber, sound insulation pad, interior sound insulation, vibration isolation carpet, body glass, roof and other places in the car, effectively improving the vibration and noise in the car. However, the cavity channel in the body structure will also produce and transmit vibration and noise, and this technical problem has not been well solved. The manufacturing process of the car body is as follows: firstly, the metal plate is stamped and formed by a mold, and then it is welded by automobile plate metals such as inner plate, reinforcing plate and outer plate. Therefore, generally, necessary gaps and spaces will be formed between the inner panel, the reinforcing panel and the outer panel, including cavities in areas such as body floor beams, A, B, C and D pillars, rear wheel covers, ceilings, upper and lower front panels, ceilings, upper ends of rear fenders and four door panels. In particular, the vertical columns of the car body reinforcements A, B, C and D and the longitudinal beams at both sides of the bottom all form hollow columnar structural members. The hollow structure of these columns and longitudinal beams effectively ensures the strength and stiffness of the car body structure, so the cavity state in the car body structure is necessary. However, the cavity of this body structure also forms a special channel for transmitting external noise and vibration. Long metal parts such as the roof and longitudinal beam of the car body will produce noise due to structural deformation and vibration when passing through road gullies; When the vehicle is driving at high speed, the body will rattle due to external wind pressure and wind resistance; The sand and gravel on the road will also cause impact noise to the car body during movement; The * * * vibration frequency generated in the movement will cause vibration and sound to the body outer panel. These noises and vibrations will be quickly transmitted in the cavity between the inner and outer panels of the car body, and then transmitted to the cockpit of the car, which will affect the comfort of drivers and passengers.

The utility model aims to solve the problems existing in the prior art, and provides a cavity partition block installed on the inner side of the upper part of the A-pillar of an automobile, which can close the cavity of the automobile body and effectively improve the vibration and noise in the cabin. In order to achieve the above purpose, the utility model adopts the following technical scheme: a cavity sound insulation block installed on the inner side of the upper part of the A-pillar of an automobile comprises a high-temperature resistant bracket and a foaming body connected to the bracket and capable of foaming and expanding after being heated; The shape of the bracket is similar to the cross section of the internal cavity in the upper part of the A-pillar of the automobile, and there is a gap between the bracket and the peripheral body panel with the corresponding cross section. One side of the bracket is provided with an elastic buckle for clamping the sheet metal of the body panel and a stop pre-tightening block for preventing the buckle from being excessively clamped, and the elastic buckle and the stop pre-tightening block are integrated. The elastic buckle consists of two oppositely arranged elastic sheets, and each elastic sheet consists of a connecting sheet connected with the bracket and a cone arranged at the top end of the connecting sheet; The two stop pre-tightening blocks are respectively connected to the two connecting pieces. The two stop blocks and the pre-tightening block connected to the two connecting pieces respectively extend obliquely to the outside front. According to the reasonable and ideal operation procedure in the automobile manufacturing process, the sound insulation block of the automobile body cavity of the utility model is installed in the automobile body cavity at the upper part of the A-pillar of the automobile, and the body-in-white is subjected to pickling, neutralization, purification and phosphating treatment, and then is painted for the first time and baked in spray booth. After a period of time at the high temperature of 160 190℃, the foam foams and bonds, and the sound insulation block is tightly bonded with the body panel at the inner side of the upper part of the A-pillar of the automobile, which can effectively block the cavity channel there and realize complete closure, thus blocking the vibration source and noise introduced from the A-pillar through the body cavity, further improving and improving the vibration isolation, sound insulation, vibration reduction and noise reduction of the vehicle cabin.

Fig. 1 is a schematic diagram of the three-dimensional structure of the cavity sound insulation block installed in the upper part of the A-pillar of the automobile; Fig. 2 is a schematic plan view of the soundproof block shown in fig. 1.

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Referring to fig. 1 and fig. 2, the hollow soundproof block of the utility model is installed on the inner side of the upper part of the A-pillar of an automobile, and comprises a high-temperature resistant bracket I and a foam body 2 connected to the bracket I and capable of foaming and expanding after being heated; The bracket I has a shape similar to the cross section of the upper internal cavity of the A-pillar of the automobile, and there is a gap between the bracket I and the peripheral body panel of the corresponding cross section. One side of the bracket I is provided with an elastic buckle 3 for clamping the sheet metal of the body panel and a stop pre-tightening block 4 for preventing the buckle from being excessively clamped, and the elastic buckle 3 and the stop pre-tightening block 4 are connected into a whole. The elastic buckle 3 in the utility model is composed of two elastic pieces arranged oppositely, and each elastic piece is composed of a connecting piece connected with a bracket and a cone arranged at the top end of the connecting piece. In the utility model, two stop pre-tightening blocks 4*** are respectively connected to two connecting pieces and extend obliquely outwards and forwards. When the utility model is installed, the parts of the sound insulation block are clamped into the square hole of the metal plate through the elastic buckle 3, and under the action of the stopper and the pre-tightening block 4, the parts can be effectively prevented from failing due to being clamped too tightly. At the same time, because the stopper and the pre-tightening block 4 are squeezed, a reaction force will be generated on the buckle, so that the buckle is firmly fixed in the square hole of the metal plate, which can effectively prevent the parts from rotating in the effective cutting surface, and the problem that the parts need to be provided with anti-rollover and stop structures is eliminated.

Claim 1. The invention relates to a cavity soundproof block installed on the inner side of the upper part of an automobile A-pillar, which comprises a high-temperature resistant bracket and a foaming body connected to the bracket and capable of foaming and expanding after heating; The bracket has a shape similar to the cross section of the cavity in the upper part of the A-pillar of the automobile, and a gap is left between the bracket and the peripheral body panel of the corresponding cross section. Characterized in that one side of the bracket is provided with an elastic buckle for clamping the sheet metal of the car body panel and a stop pre-tightening block for preventing the buckle from being excessively clamped, and the elastic buckle and the stop pre-tightening block are connected into a whole.

2. The cavity soundproof block installed inside the upper part of automobile A-pillar according to claim 1, characterized in that the elastic buckle consists of two elastic pieces arranged oppositely, and each elastic piece consists of a connecting piece connected with a bracket and a cone arranged at the top end of the connecting piece; The two stop pre-tightening blocks are respectively connected to the two connecting pieces.

3. The cavity soundproof block installed on the inner side of the upper part of the A-pillar of the automobile according to claim 2, characterized in that the two stoppers and the pre-tightening block connected to the two connectors respectively extend obliquely to the outer front.

A cavity soundproof block installed on the inner side of the upper part of the A-pillar of an automobile comprises a high-temperature resistant bracket and foam connected to the bracket, and the foam can expand after being heated. The bracket has a shape similar to the cross section of the cavity in the upper part of the A-pillar of the automobile, and a gap is left between the bracket and the peripheral body panel of the corresponding cross section. Characterized in that one side of the bracket is provided with an elastic buckle for clamping the sheet metal of the car body panel and a stop pre-tightening block for preventing the buckle from being excessively clamped, and the elastic buckle is integrated with the stop pre-tightening block. The utility model is preset in the car body cavity at the inner side of the upper part of the A-pillar of the car, and can be closely combined with the car body panel at this place after foaming and expanding, effectively blocking the cavity channel at this place, and achieving the purposes of further improving and improving the vibration isolation, sound insulation, vibration reduction and noise reduction of the car cabin.