CN112874274B

CN112874274B - High sound insulation volume door structure

Info

Publication number: CN112874274B
Application number: CN202110176239.4A
Authority: CN
Inventors: 钟银辉; 李沛然; 刘志鹏; 夏铁权; 邹途祥; 陈景昌; 赵涛
Original assignee: China Automotive Engineering Research Institute Co Ltd
Current assignee: China Automotive Engineering Research Institute Co Ltd
Priority date: 2021-02-06
Filing date: 2021-02-06
Publication date: 2022-11-11
Anticipated expiration: 2041-02-06
Also published as: CN112874274A

Abstract

The invention discloses a high-sound-insulation-capacity car door structure which comprises a car door outer side metal plate, a car door inner side metal plate and a car door inner decorative plate, wherein mixed sound insulation cotton is bonded between the car door inner side metal plate and the car door inner decorative plate, the mixed sound insulation cotton is formed by splicing a plurality of small sound insulation cotton, the small sound insulation cotton comprises two sound absorption layers arranged on the left and right sides and a sound insulation layer bonded between the two sound absorption layers, the upper end of the sound insulation layer extends upwards to form an upper closing section, the lower end of the sound insulation layer extends downwards to form a lower closing section, the upper closing section and the lower closing section can be bonded together, and the mixed sound insulation cotton is bonded on the car door inner decorative plate all the time. Set up mixed type soundproof cotton between inboard panel beating of door and door interior plaque, increase the sound insulating layer between inboard panel beating of door and the door interior plaque to the sound that transmits in the car outside the door can be attenuated high-efficiently, noise in the reduction car promotes whole car travelling comfort.

Description

High sound insulation volume door structure

Technical Field

The invention relates to the technical field of automobile abnormal sound, in particular to a vehicle door structure with a high sound insulation effect.

Background

General door structure mainly comprises door outside panel beating, the inboard panel beating of door and the decorative board that covers on the panel beating of inboard, and the sound that can't attenuate outside the door transmitted to the car in, influences the travelling comfort of whole car. At present, part of vehicles can increase the soundproof cotton about one deck 10mm between the inboard panel beating of door and decorative board to because the inner structure of plaque is complicated in the door, make not enough space arrange monoblock soundproof cotton between inboard panel beating of most door and the plaque in the door, consequently soundproof cotton's arrangement mode adopts arranges the smaller soundproof cotton of an area, perhaps will several soundproof cotton dispersion arrange on the plaque in the door.

Above-mentioned soundproof cotton's main sound insulation structural style of inhaling can understand as "inboard panel beating of door + sound absorbing layer + interior plaque", but individual layer soundproof cotton can not play the effect of fine isolated noise to reduce the soundproof cotton and arrange or the dispersion is arranged, make partly do not have soundproof cotton between inboard panel beating of door and the interior plaque of door, thereby influence the whole sound insulation performance that inhales of door.

Disclosure of Invention

The invention aims to improve the sound insulation performance of the automobile door structure, efficiently attenuate the sound transmitted into the automobile from the outside of the automobile door, reduce the noise in the automobile and improve the comfort of the whole automobile.

Therefore, the technical scheme adopted by the invention is as follows: the utility model provides a high sound insulation volume door structure, includes door outside panel beating, the inboard panel beating of door and door interior plaque, it is provided with mixed type soundproof cotton to bond between inboard panel beating of door and the door interior plaque, mixed type soundproof cotton is formed by the concatenation of a plurality of little soundproof cotton, little soundproof cotton is including controlling the two-layer acoustic absorber that sets up to and bond the puigging of setting between two-layer acoustic absorber, and the upper end of puigging upwards extends and forms the section of closing, and the lower extreme downwardly extending of puigging forms the section of closing down, and the section of closing up can bond together with the section of closing down, little soundproof cotton's gross thickness is 10mm-30mm, and the thickness of the inboard panel beating of door is 0.6 mm-2.0 mm, and the thickness of puigging is 3 mm-5 mm, the thickness of sound absorber is greater than the thickness of puigging, and mixed type soundproof cotton bonds all the time on the door interior plaque.

Preferably, the upper closing section and the lower closing section are connected by a fastening tape, a fastening tape female surface is arranged on the left side of the upper closing section and the lower closing section, a fastening tape male surface is arranged on the right side of the upper closing section and the lower closing section, the lengths of the upper closing section and the lower closing section are equal, and the lengths of the fastening tape female surface and the fastening tape male surface are equal to the lengths of the upper closing section and the lower closing section. The primary surface of the magic tape is the hard and soft round fiber hair, the secondary surface of the magic tape is the hard and hooked bristles, the two surfaces of the primary and the secondary can form a firm bonding effect, and the upper closing section and the lower closing section are connected by the magic tape to increase the connection effect.

Further preferably, the sound absorption layer is made of polyurethane, waste spinning felt and cotton felt; the sound insulation layer is made of ethylene-vinyl acetate copolymer or polyethylene film.

Preferably, the sound absorption layer close to the side of the vehicle door is of a honeycomb-shaped three-dimensional hollow structure.

The invention has the beneficial effects that:

(1) The mixed type soundproof cotton is added between the door inner side metal plate and the door inner side metal plate, the main sound absorption and insulation structural form is changed from the door inner side metal plate, the sound absorption layer and the door inner side metal plate into the door inner side metal plate, the sound absorption layer, the sound insulation layer, the sound absorption layer and the door inner side metal plate, the outside sound is subjected to sound absorption twice and sound insulation three times, the energy transmitted from the outside of the automobile to the inside of the automobile can be greatly attenuated, the noise in the automobile is reduced, and the comfort of the whole automobile is improved;

(2) The mixed sound insulation cotton is formed by splicing a plurality of small sound insulation cotton, wherein the spliced part consists of two sound insulation layers, and the sound insulation layers are 3-5 mm in thickness, so that the sound insulation cotton can be used at a narrow position in space, and the problem that the sound insulation performance of the whole vehicle door is influenced because no sound insulation cotton exists between a metal plate at the inner side of the vehicle door and a vehicle door decorative plate can be effectively solved;

(3) Mixed type soundproof cotton is formed by the concatenation of a plurality of little soundproof cotton, leaves a plurality of cavitys during the concatenation between mixed type soundproof cotton and door and the door panel beating, and this cavity can the active absorption low frequency, and itself inhales the sound cotton and has good medium-high frequency to absorb the sound of each frequency, and be provided with the cavity and also make things convenient for the heat dissipation owing to inhale the cotton absorption of sound and be converted into friction heat energy with acoustic energy.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the sound-insulating cotton of the present invention.

Detailed Description

The invention will be further illustrated by the following examples in conjunction with the accompanying drawings:

with reference to fig. 1-2, a door structure with high sound insulation capacity mainly comprises a door outer side metal plate, a door inner side metal plate 1, a door inner decorative plate 2 and mixed sound insulation cotton. The automobile door outer side metal plate, the automobile door inner side metal plate 1 and the automobile door inner decorative plate 2 are sequentially arranged from outside to inside.

The mixed type soundproof cotton is bonded between the metal plate 1 on the inner side of the vehicle door and the vehicle door interior decorative plate 2. Mixed type soundproof cotton is formed by the concatenation of a plurality of little soundproof cotton 3, and little soundproof cotton 3 sets up two-layer acoustic absorber 4 including controlling to reach the puigging 5 that bonds and set up between two-layer acoustic absorber 4. The upper end of the sound insulation layer 5 extends upwards to form an upper closing section 5a, the lower end of the sound insulation layer 5 extends downwards to form a lower closing section 5b, and the upper closing section 5a and the lower closing section 5b can be bonded together. The total thickness of the small soundproof cotton 3 is 10mm-30mm, the thickness of the metal plate 1 on the inner side of the vehicle door is 0.6 mm-2.0 mm, the thickness of the soundproof layer 5 is 3 mm-5 mm, and the thickness of the sound absorption layer 4 is larger than that of the soundproof layer 5. The mixed soundproof cotton is always bonded on the door trim panel 2.

The upper section 5a and the lower section 5b are preferably connected by a hook and loop fastener, also called a hook and loop fastener. The left sides of the upper combining section 5a and the lower combining section 5b are provided with a hook and loop tape mother surface a, the right sides of the upper combining section 5a and the lower combining section 5b are provided with a hook and loop tape child surface b, the hook and loop tape child surface b is fine and soft round fiber wool, the hook and loop tape mother surface a is hard barbed hair with hooks, and the connection of the hook and loop tapes is very firm in bonding effect. The lengths of the upper combining section 5a and the lower combining section 5b are equal, and the lengths of the hook and loop tape mother surface a and the hook and loop tape surface b are equal to the lengths of the upper combining section 5a and the lower combining section 5 b.

The sound absorption layer 4 is made of sound absorption materials, polyurethane, waste spinning felt, cotton felt and the like are preferably selected, the waste spinning felt is recycled, and the cost of the waste spinning felt and the cost of the cotton felt are both low. The sound insulation layer 5 is made of sound insulation materials, preferably ethylene-vinyl acetate copolymer and polyethylene films, has the characteristics of light weight and good sound insulation effect, is high in opening and closing frequency of the vehicle door, and does not excessively increase the total weight of the vehicle door by adopting light materials.

The sound absorption layer 4 close to the side of the vehicle door adopts a honeycomb-shaped three-dimensional hollow structure, the size of the three-dimensional hollow structure is small, the sound absorption cotton of the three-dimensional hollow structure is not shown in the figure, each hollow hole lattice forms a sound absorption cavity, abnormal sounds from all directions (the abnormal sounds are not limited to the lap joint positions of the interior trimming panels and also include other abnormal sounds in the vehicle) can be absorbed in an all-round manner, the noise is attenuated in sequence through the sound absorption cavities, and finally the noise reduction effect is achieved.

Claims

1. The utility model provides a high sound insulation volume door structure, includes that door outside panel beating, inboard panel beating of door (1) and door interior plaque (2), its characterized in that: the door structure is characterized in that mixed soundproof cotton is bonded between a door inner side metal plate (1) and a door inner trim panel (2), the mixed soundproof cotton is formed by splicing a plurality of small soundproof cotton (3), the small soundproof cotton (3) comprises two sound absorption layers (4) which are arranged on the left and the right, and a sound insulation layer (5) arranged between the two sound absorption layers (4) in a bonding manner, the upper end of the sound insulation layer (5) upwards extends to form an upper closing section (5 a), the lower end of the sound insulation layer (5) downwards extends to form a lower closing section (5 b), the upper closing section (5 a) and the lower closing section (5 b) can be bonded together, the total thickness of the small soundproof cotton (3) is 10mm-30mm, the thickness of the door inner side metal plate (1) is 0.6 mm-2.0 mm, the thickness of the sound insulation layer (5) is 3 mm-5 mm, the thickness of the sound insulation layer (4) is larger than that of the sound insulation layer (5), the mixed soundproof cotton is bonded on the door inner side metal plate (2), and when the door inner side metal plate is spliced, the mixed soundproof cotton and the door inner side (1) can absorb a plurality of low-frequency heat dissipation cavities and the heat dissipation metal plates;

the upper closing section (5 a) and the lower closing section (5 b) are connected through a fastening tape, a fastening tape female surface (a) is arranged on the left side of the upper closing section (5 a) and the lower closing section (5 b), a fastening tape sub-surface (b) is arranged on the right side of the upper closing section (5 a), the length of the upper closing section (5 a) and the length of the lower closing section (5 b) are equal, and the lengths of the fastening tape female surface (a) and the fastening tape sub-surface (b) are equal to the lengths of the upper closing section (5 a) and the lower closing section (5 b).

2. The high sound-proof amount vehicle door structure according to claim 1, wherein: the sound absorption layer (4) is made of polyurethane, waste spinning felt and cotton felt; the sound insulation layer (5) is made of ethylene-vinyl acetate copolymer or polyethylene film.

3. The vehicle door structure with high sound insulation according to claim 2, wherein: the sound absorption layer (4) close to the side of the vehicle door is of a honeycomb-shaped three-dimensional hollow structure.