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CN-224211006-U - Composite front wall sound insulation pad

CN224211006UCN 224211006 UCN224211006 UCN 224211006UCN-224211006-U

Abstract

The utility model discloses a composite front wall sound insulation pad, which relates to the technical field of new energy automobiles and comprises a pad main body, wherein the pad main body is formed by compositely bonding a barrier layer, a reflecting layer and a sound absorption layer, the barrier layer is a hard polyethylene terephthalate/polypropylene blend fiber surface layer, a compact structure is used for blocking high-frequency noise of an engine room, the reflecting layer is a polyethylene/polyamide/polyethylene composite film middle layer, the structural noise generated by the vibration of the metal plate is restrained, a mass-spring system is formed by rigid support of the polyamide film, low-frequency sound waves are reflected, the sound absorption layer is a polyethylene terephthalate/wool composite cotton felt bottom layer, the wool fiber natural pore structure absorbs medium-frequency sound waves, and full-frequency noise control is realized through the cooperative design of the hard barrier layer, the elastic reflection layer and the porous sound absorption layer.

Inventors

  • XIE JIANYU
  • Fu Benteng
  • XIE XIAORONG
  • WANG BINGJUN
  • HU XIMEI

Assignees

  • 江苏赛露达汽车隔音材料有限公司

Dates

Publication Date
20260508
Application Date
20250618

Claims (6)

  1. 1. The utility model provides a enclose sound insulation pad before compounding, a serial communication port, including pad main part (1), pad main part (1) is formed by separation layer (11), reflection stratum (12) and sound absorbing layer (13) complex bonding, separation layer (11) complex bonding is in the upside of reflection stratum (12), sound absorbing layer (13) complex bonding is in the downside of reflection stratum (12), the middle part of pad main part (1) is provided with crease (7), make it become mirror symmetry structure, the both sides of pad main part (1) are all hot briquetting has to turn over a limit (2), the department of buckling of turning over a limit (2) is provided with the arch.
  2. 2. A composite front wall sound insulation pad according to claim 1, wherein the two ends of one side of the pad body (1) are hot-pressed with an invagination area (3), and the depth of the invagination area (3) is equal to the thickness of the pad body (1).
  3. 3. A composite front wall sound insulation pad according to claim 2, wherein the edge of the recessed area (3) is reversely hot-pressed with a mounting area (4), and the depth of the mounting area (4) is equal to the depth of the recessed area (3).
  4. 4. A composite front wall sound insulation pad according to claim 3, wherein the second circular angle groove (6) is hot-pressed in the middle of the invagination area (3) and the middle of the pad main body (1), and the opening directions of the invagination area (3) and the second circular angle groove (6) are the same.
  5. 5. A composite front wall sound insulation pad according to claim 4, wherein the middle part of the invagination area (3) is hot-pressed with a first circular angle groove (5), and the opening direction of the first circular angle groove (5) is opposite to the opening direction of the invagination area (3).
  6. 6. A composite front wall sound insulation pad according to claim 5, wherein the first circular angle groove (5) and the second circular angle groove (6) have the same depth, and the first circular angle groove (5) and the second circular angle groove (6) are distributed vertically.

Description

Composite front wall sound insulation pad Technical Field The utility model relates to the technical field of new energy automobiles, in particular to a composite front wall sound insulation pad. Background The front surrounding plate is an important component part of an automobile body, is positioned between an engine compartment and a carriage, plays a role in isolating engine exhaust gas, high temperature and noise, and is used as a core component for controlling noise, vibration and acoustic vibration roughness of a new energy automobile, and aims at unique challenges such as high-frequency noise, structural vibration and cavity resonance of a motor. However, when the driving motor and the speed reducer run at high speed, electromagnetic vibration and mechanical meshing noise are generated, the typical frequency range is concentrated at 2000-5000Hz, the sound pressure level can reach 85-95dB, the traditional sound insulation material is easy to penetrate to form sharp whistle, and the driving comfort is seriously affected. Disclosure of utility model The utility model aims to solve the problems in the prior art and provides a composite front wall sound insulation pad. In order to achieve the aim, the composite front wall sound insulation pad comprises a pad main body, wherein the pad main body is formed by bonding a blocking layer, a reflecting layer and a sound absorption layer in a composite mode, the blocking layer is bonded on the upper side of the reflecting layer in a composite mode, the sound absorption layer is bonded on the lower side of the reflecting layer in a composite mode, folds are formed in the middle of the pad main body to form a mirror symmetry structure, turnover edges are formed in two sides of the pad main body in a hot press mode, and protrusions are arranged at bent positions of the turnover edges. Preferably, the two ends of one side of the pad body are hot-pressed with an invagination area, and the depth of the invagination area is equal to the thickness of the pad body. Preferably, the edge position of the invagination area is reversely hot-pressed with a mounting area, and the depth of the mounting area is equal to that of the invagination area. Preferably, the second circular angle groove is hot-pressed in the middle part of the invagination area and the middle part of the pad main body, and the opening directions of the invagination area and the second circular angle groove are the same. Preferably, the middle part of the invagination area is hot-pressed with a first circular angle groove, and the opening direction of the first circular angle groove is opposite to the opening direction of the invagination area. Preferably, the first rounded corner groove and the second rounded corner groove have the same depth, and the first rounded corner groove and the second rounded corner groove are distributed perpendicular to each other. Compared with the prior art, the utility model has the advantages and positive effects that: 1. In the utility model, the barrier layer is a hard polyethylene terephthalate/polypropylene blend fiber surface layer, the dense structure blocks high-frequency noise of an engine cabin, the reflecting layer is a polyethylene/polyamide/polyethylene composite film middle layer, structural noise generated by sheet metal vibration is restrained, the polyamide film is rigidly supported to form a 'mass-spring' system, low-frequency sound waves are reflected, the sound absorbing layer is a polyethylene terephthalate/wool composite cotton felt bottom layer, the wool fiber natural pore structure absorbs medium-frequency sound waves, and full-frequency noise control is realized through the collaborative design of the hard barrier layer, the elastic reflecting layer and the porous sound absorbing layer. 2. According to the utility model, the pad main body is divided into two symmetrical parts by the crease, and when the mounting areas at the two ends are used for mounting, the pad main body can be better attached to the automobile front wall part, wherein the pad main body is hot-pressed with the inward sinking area and the second circular angle groove with the same opening direction and the mounting area and the first circular angle groove with the same opening direction, the structural strength of the pad main body is enhanced, the first circular angle groove and the second circular angle groove are in a vertical state, and under the action of the folding edges at the two sides, the deformation resistance of the pad main body is enhanced. Drawings Fig. 1 is a schematic diagram of a first perspective structure of a composite front wall sound insulation pad according to the present utility model; Fig. 2 is a schematic diagram of a second perspective structure of a composite front wall sound insulation pad according to the present utility model; Fig. 3 is a cross-sectional view of a composite front wall sound insulation mat according to the present utility model. The