CN-224225011-U - Automobile sound insulation plastic ceiling with porous sound absorption structure

CN224225011UCN 224225011 UCN224225011 UCN 224225011UCN-224225011-U

Abstract

The utility model relates to the technical field of automobile parts, in particular to an automobile sound insulation plastic ceiling with a porous sound absorption structure, which comprises an outer protection plate, a middle plate and a middle plate, wherein the outer protection plate is a plate body structure attached to the shape of the automobile roof and is made of modified polycarbonate materials; the bottom end of the outer protection plate is provided with an inward concave groove, an upper porous sound absorbing plate is arranged in the concave groove of the outer protection plate, and the bottom end of the upper porous sound absorbing plate is fixedly bonded with the perforated support plate through an epoxy resin adhesive. This car sound insulation plastic ceiling with porous sound absorbing structure, upper porous acoustic board and perforation backup pad adopt the bonding of epoxy adhesive to fix, and perforation backup pad and lower floor porous acoustic board pass through protruding piece block joint and are connected, and the sound absorption post upwards passes upper porous acoustic board, perforation backup pad and lower floor porous acoustic board and fixes on braced frame surface with the array mode simultaneously, and composite connection structure can effectively resist vehicle vibration.

Inventors

ZHANG XUFENG
Yang Bendong
HU SUMEI

Assignees

宁波市加邦汽车部件有限公司

Dates

Publication Date: 20260512
Application Date: 20250801

Claims (7)

1. An automotive sound insulating plastic ceiling with a porous sound absorbing structure comprising: The outer protection plate (1) is of a plate body structure attached to the roof shape of the automobile, and the outer protection plate (1) is made of modified polycarbonate materials; The anti-theft device is characterized in that an inward concave groove is formed in the bottom end of the outer protection plate (1), an upper porous sound absorption plate (2) is arranged in the concave groove of the outer protection plate (1), the bottom end of the upper porous sound absorption plate (2) is fixedly bonded with the perforated support plate (3) through an epoxy resin adhesive, and a protruding block which is in clamping connection with the lower porous sound absorption plate (4) is arranged at the bottom end of the perforated support plate (3); The lower porous sound absorbing plate (4) bottom has been laid and has been connected floor (5), and connects floor (5) and run through by sound absorbing column (6) to sound absorbing column (6) upwards run through upper porous sound absorbing plate (2), perforation backup pad (3) and lower floor porous sound absorbing plate (4), sound absorbing column (6) are fixed at braced frame (7) surface with the mode of array, and braced frame (7) bottom has decorative inner panel (8) through the bonding of epoxy adhesive, and decorative inner panel (8) are glued with side shrouding (9).
2. The automobile sound insulation plastic ceiling with the porous sound absorption structure as set forth in claim 1, wherein the upper porous sound absorption plate (2) and the lower porous sound absorption plate (4) are arranged in parallel, and the upper porous sound absorption plate (2) and the lower porous sound absorption plate (4) are melamine foam plates.
3. The automobile sound insulation plastic ceiling with the porous sound absorption structure of claim 1, wherein the surfaces of the upper porous sound absorption plate (2) and the lower porous sound absorption plate (4) are coated with fluorocarbon coatings, and the holes of the upper porous sound absorption plate (2) and the lower porous sound absorption plate (4) are arranged in a staggered manner.
4. The sound insulation plastic ceiling with the porous sound absorption structure for the automobile, as claimed in claim 1, is characterized in that the perforated support plate (3) is made of glass fiber reinforced polypropylene, and through holes penetrated by the sound absorption columns (6) are formed in the perforated support plate (3).
5. The sound-insulating plastic ceiling with the porous sound absorption structure for the automobile, which is disclosed in claim 1, is characterized in that the sound absorption column (6) is a column body made of polyurethane material, and the diameter of the sound absorption column (6) is matched with the diameter of the through hole on the perforated support plate (3).
6. The sound insulation plastic ceiling with the porous sound absorption structure for the automobile, as claimed in claim 1, is characterized in that the connecting rib plates (5) are of a grid-shaped structure, and the connecting rib plates (5) are made of the same material as the supporting frames (7) and are all plate bodies made of glass fiber reinforced polypropylene.
7. The sound-insulating plastic ceiling with the porous sound absorption structure of the automobile, as set forth in claim 1, wherein the side edge sealing plates (9) are adhered around the side wall surfaces of the lower porous sound absorption plate (4), the connecting rib plates (5) and the supporting frames (7).

Description

Automobile sound insulation plastic ceiling with porous sound absorption structure Technical Field The utility model relates to the technical field of automobile parts, in particular to an automobile sound insulation plastic ceiling with a porous sound absorption structure. Background In the field of automobile industry, an automobile sound insulation plastic ceiling is used as an important acoustic and structural component in an automobile, and has the main effects of reducing external noise from being transmitted into the automobile, reducing noise generated by self vibration in the automobile, and improving riding comfort. In the use period of the existing automobile sound insulation plastic ceiling with the porous sound absorption structure, due to the fact that the bonding strength between the porous sound absorption structure and a base material is insufficient, layering and falling phenomena are easy to occur due to the influences of factors such as vibration and temperature change of a vehicle in the long-term use process, the sound absorption performance is reduced, the integral structural strength and rigidity of the ceiling can be reduced to a certain extent due to the existence of the porous structure, deformation is easy to occur in the installation and use processes, the assembly precision of the automobile sound insulation plastic ceiling and an automobile body is influenced, and even a new vibration noise source can be possibly generated. Disclosure of utility model The utility model aims to provide an automobile sound insulation plastic ceiling with a porous sound absorption structure, which solves the problems that in the prior art, the bonding strength between the porous sound absorption structure and a base material is insufficient, layering and falling phenomena are easy to occur due to the influence of factors such as vibration and temperature change of a vehicle in the long-term use process, the sound absorption performance is reduced, the integral structural strength and rigidity of the ceiling can be reduced to a certain extent due to the existence of the porous structure, deformation is easy to occur in the installation and use processes, the assembly precision between the porous sound absorption structure and a vehicle body is influenced, and even a new vibration noise source is possibly generated. In order to achieve the aim, the technical scheme is that the automobile sound insulation plastic ceiling with the porous sound absorption structure comprises an outer protection plate, wherein the outer protection plate is a plate body structure which is attached to the shape of the automobile roof, and the outer protection plate is made of modified polycarbonate materials; The bottom end of the outer protection plate is provided with an inward concave groove, an upper porous sound absorbing plate is arranged in the concave groove of the outer protection plate, the bottom end of the upper porous sound absorbing plate is fixedly bonded with the perforated support plate through an epoxy resin adhesive, and the bottom end of the perforated support plate is provided with a protruding block which is in clamping connection with the lower porous sound absorbing plate; The lower porous sound absorbing plate is characterized in that a connecting rib plate is laid at the bottom end of the lower porous sound absorbing plate, the connecting rib plate is penetrated by a sound absorbing column, the sound absorbing column upwards penetrates through the upper porous sound absorbing plate, the perforated supporting plate and the lower porous sound absorbing plate, the sound absorbing column is fixed on the surface of the supporting frame in an array mode, the bottom end of the supporting frame is adhered with a decorative inner plate through an epoxy resin adhesive, and the decorative inner plate is adhered with the side edge sealing plate. By adopting the technical scheme, the upper porous sound absorbing plate is fixed through the outer protection plate groove, and the bonding strength of each part is improved by combining multiple connection modes such as adhesive bonding, clamping connection, sound absorbing column array fixing and the like. Preferably, the upper porous sound absorbing plate and the lower porous sound absorbing plate are arranged in parallel, and the upper porous sound absorbing plate and the lower porous sound absorbing plate are melamine foam plates. By adopting the technical scheme, the upper layer and the lower layer porous sound absorbing plates are arranged in parallel and are melamine foam plates, so that a double sound absorbing barrier can be formed, the absorption effect on sound waves with different frequencies is enhanced, and the noise reduction capability is improved. Preferably, the surfaces of the upper porous sound absorbing plate and the lower porous sound absorbing plate are coated with fluorocarbon coatings, and the holes of the upper porous sound absorbing plat