High-sealing-performance environment-friendly sound-absorbing cotton for vehicle

Abstract

The utility model relates to high-sealing-performance environment-friendly sound-absorbing cotton for a vehicle, which is characterized in that the unique structural design is adopted, and the functions of thickness adjustability, high sealing performance and environment friendliness are realized. The sound absorption device comprises at least one set of clamping units and a plurality of sound absorption cotton, each clamping unit is composed of two oppositely-arranged clamping plates, the sound absorption cotton is arranged between the two clamping plates of the same set of clamping units, the adjacent sound absorption cotton is detachably connected, and the adjacent clamping units are detachably connected. A plurality of mounting grooves which are uniformly distributed in the length direction of the clamping plate are formed in the surface of the clamping plate and are used for fixing the sound-absorbing cotton. The sound-absorbing cotton is composed of a plurality of cotton layers with different thicknesses, and the cotton layers are bonded through environment-friendly water-based adhesives. The adjacent sound-absorbing cotton is detachably connected through the buckle and clamping groove structures on the edges of the sound-absorbing cotton. The adjacent clamping units are connected through connecting pieces, each connecting piece comprises a connecting plate and connecting hooks at the two ends, the hooks are matched with hanging holes in the clamping plates, and the overall stability and sealing performance are enhanced.

Description

Technical Field

[0001] This utility model provides a sound-absorbing cotton, and particularly relates to a highly airtight and environmentally friendly automotive sound-absorbing cotton. Background Technology

[0002] Automotive sound-absorbing cotton is a key component installed inside a car to absorb noise and improve driving comfort. Traditional automotive sound-absorbing cotton is mostly a single layer or a few layers of fixed thickness, typically glued to the car's interior. In terms of basic structure, most existing sound-absorbing cotton uses a simple single-layer or multi-layered felt structure. While it can absorb high-frequency noise to some extent, its sound insulation effect on low-frequency noise is poor, and it is difficult to flexibly adjust the overall thickness according to different vehicle spaces and sound insulation needs, presenting significant limitations. Furthermore, some sound-absorbing cotton uses adhesives containing harmful substances such as formaldehyde, which may release harmful gases with long-term use, adversely affecting the air quality inside the vehicle and the health of the occupants.

[0003] Most existing automotive sound-absorbing cotton systems employ a non-removable, fixed design. Once installed, it's difficult to adjust or replace them based on wear and tear or changes in sound insulation during actual use. Furthermore, the connection between existing sound-absorbing cotton and the vehicle's interior trim is poorly sealed, easily leaving gaps that allow noise to enter the vehicle through these weak points, severely impacting the overall sound insulation performance. Compared to this application, the shortcomings of existing technologies are mainly reflected in: firstly, the inability to flexibly adjust the thickness of the sound-absorbing cotton to adapt to different vehicle models and sound insulation needs; secondly, insufficient environmental performance, posing a potential risk of releasing harmful substances; and thirdly, difficulty in disassembly and maintenance after assembly, coupled with poor overall sealing, hindering effective sound insulation. Utility Model Content

[0004] In order to solve the above problems, this application provides a high-sealing environmentally friendly automotive sound-absorbing cotton, which solves the problems of poor sealing, environmental non-environmental protection and difficulty in adjustment and assembly of traditional sound-absorbing cotton, and achieves flexible and adjustable thickness, high sealing performance and environmental protection requirements.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-sealing environmentally friendly automotive sound-absorbing cotton, comprising at least a set of clamping units and several sound-absorbing cottons. The clamping unit is composed of two clamping plates arranged opposite to each other. Several sound-absorbing cottons are placed between the two clamping plates of the same set of clamping units, and adjacent sound-absorbing cottons are detachably connected. Adjacent clamping units are also connected by a detachable connection to achieve adjustable thickness assembly and high-sealing environmental protection function of the overall sound-absorbing cotton device.

[0006] Preferably, the clamping plate has a rectangular plate structure with several mounting grooves on its surface. The mounting grooves are evenly distributed along the length of the clamping plate to fix the sound-absorbing cotton between the two clamping plates.

[0007] Preferably, the sound-absorbing cotton comprises multiple layers of cotton of different thicknesses, which are bonded and fixed together by an adhesive. The adhesive is an environmentally friendly water-based adhesive to ensure the environmental performance of the sound-absorbing cotton. Furthermore, the edges of adjacent sound-absorbing cotton are provided with mutually cooperating buckle structures and slot structures. The buckle structures and slot structures are engaged to achieve a detachable connection between adjacent sound-absorbing cotton.

[0008] Preferably, two adjacent sets of clamping units are connected by a connector, which includes a connecting plate and connecting hooks at both ends of the connecting plate. The connecting hooks cooperate with the hanging holes on the clamping plate to connect the two adjacent sets of clamping units into one unit, thereby enhancing the stability and sealing of the overall device.

[0009] Preferably, the clamping plate has a sealing strip structure on its inner edge. The sealing strip structure is made of flexible rubber. When the clamping plate clamps the sound-absorbing cotton, the sealing strip structure fits tightly against the side of the sound-absorbing cotton, further improving the sealing performance of the sound-absorbing cotton device.

[0010] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0011] This device addresses the problems of poor sealing, insufficient environmental performance, and difficulty in adjustment and assembly of existing automotive sound-absorbing cotton by proposing an innovative solution. Its core lies in employing at least one set of clamping units and several detachably connected sound-absorbing cotton units. Each clamping unit consists of two opposing clamping plates, with several sound-absorbing cotton units placed between the two clamping plates of the same unit. The clamping plates are rectangular, with several evenly distributed mounting grooves along their length for securing the sound-absorbing cotton. The sound-absorbing cotton comprises multiple layers of varying thicknesses, bonded together using an environmentally friendly water-based adhesive to ensure environmental performance. Adjacent sound-absorbing cotton units have interlocking snap-fit ​​and slot structures at their edges, enabling detachable connection through plug-in engagement. Adjacent clamping units are connected by connectors, which include connecting plates and connecting hooks at both ends. These hooks engage with mounting holes on the clamping plates, enhancing overall stability and sealing. The inner edge of the clamping plate is equipped with a flexible rubber sealing strip. When the clamping plate clamps the sound-absorbing cotton, the sealing strip fits tightly against the side of the cotton, further improving the sealing performance. Through the above design, this device achieves high sealing performance, environmental protection performance, and adjustable assembly, effectively solving the problems in the prior art.

[0012] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0013] Figure 1 This is a schematic diagram showing the multi-assembly state of a high-sealing environmentally friendly automotive sound-absorbing cotton according to this utility model;

[0014] Figure 2 This is a schematic diagram of a clamping component for a high-sealing, environmentally friendly automotive sound-absorbing cotton according to the present invention.

[0015] Figure 3 This is an exploded view of a highly sealed, environmentally friendly automotive sound-absorbing cotton according to this utility model.

[0016] Figure 4 This is an exploded view of the sound-absorbing cotton of the present invention, which is a high-sealing and environmentally friendly automotive sound-absorbing cotton.

[0017] As shown in the figure:

[0018] 1. Clamping unit; 2. Sound-absorbing cotton; 3. Mounting groove; 4. Sealing strip structure. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] like Figure 1 and Figure 2As shown, a high-sealing, environmentally friendly automotive sound-absorbing cotton exhibits a key innovation in its unique structural design, achieving both adjustable thickness and high sealing performance. It comprises at least one set of clamping units and several sound-absorbing cotton units. Each clamping unit consists of two opposing clamping plates, with several sound-absorbing cotton units positioned between the two clamping plates of the same unit. Adjacent sound-absorbing cotton units and adjacent clamping units are detachably connected. Furthermore, the clamping plates are rectangular, with several evenly distributed mounting grooves along their length for securing the sound-absorbing cotton. The sound-absorbing cotton consists of multiple layers of varying thicknesses, bonded together with an environmentally friendly water-based adhesive. The snap-fit ​​and slotted structure at the edges allows for detachable connection of adjacent sound-absorbing cotton units. Adjacent clamping units are connected by connectors, which include connecting plates and hooks at both ends. The hooks engage with mounting holes on the clamping plates, enhancing overall stability and sealing. In addition, the sealing strip structure on the inner edge of the clamping plate is made of flexible rubber, which fits tightly with the inner side when clamping the sound-absorbing cotton, further improving the sealing performance.

[0023] In this implementation scheme, all components work together to achieve multi-dimensional performance improvements. First, the two clamping plates of the clamping unit fix the sound-absorbing cotton through mounting slots, ensuring the stability and reliability of the sound-absorbing cotton during use. Second, the sound-absorbing cotton adopts a multi-layer design with cotton layers of different thicknesses, combined with an environmentally friendly water-based adhesive, which not only meets the absorption needs of different frequency noises but also complies with environmental standards, avoiding the release of harmful substances. The buckle and slot structure at the edge allows adjacent sound-absorbing cotton layers to be flexibly disassembled, facilitating the adjustment of the number and thickness of sound-absorbing layers according to actual needs. Adjacent clamping units are connected by connectors, with connecting plates and connecting hooks engaging with the mounting holes to form a stable connection, improving the stability and sealing of the overall device. The sealing strip structure on the inner edge of the clamping plate is made of flexible rubber, which fits tightly against the side of the sound-absorbing cotton, effectively preventing noise from entering the vehicle through gaps and enhancing the sound insulation effect. Overall, this device, through innovative structural design and the application of environmentally friendly materials, effectively solves the problems of poor sealing, insufficient environmental performance, and difficulty in adjustment and assembly of traditional automotive sound-absorbing cotton, providing a better sound insulation environment for the car interior.

[0024] like Figure 3 and Figure 4As shown, a high-sealing, environmentally friendly automotive sound-absorbing cotton exhibits significant advantages through its unique assembly and sealing design. It comprises at least one set of clamping units and several sound-absorbing cotton units. Two clamping plates of each clamping unit are positioned opposite each other, with the sound-absorbing cotton positioned between them. Adjacent sound-absorbing cotton units and clamping units are detachably connected, achieving thickness adjustment and high sealing performance. Specifically, the clamping plates are rectangular, with mounting grooves evenly distributed along their length to secure the sound-absorbing cotton. The sound-absorbing cotton contains multiple layers of cotton of varying thicknesses, bonded together using an environmentally friendly water-based adhesive. Simultaneously, the edges of adjacent sound-absorbing cotton units are equipped with matching buckles and slots, achieving a detachable connection through interlocking. Adjacent clamping units are connected by a connector, which includes a connecting plate and connecting hooks at both ends. The hooks and the mounting holes on the clamping plates work together to firmly connect adjacent clamping units, significantly enhancing the overall stability and sealing of the device. Furthermore, the inner edge of the clamping plate is equipped with a flexible rubber sealing strip structure. When the clamping plate clamps the sound-absorbing cotton, the sealing strip structure can fit tightly against the side of the sound-absorbing cotton, thereby pushing the sealing performance to a higher level.

[0025] In this embodiment, the common implementation methods of this device are as follows:

[0026] I. Key Points for Implementing the Clamping Unit Structure

[0027] Clamping plate

[0028] Material selection: 6063-T5 aluminum alloy or polypropylene-based composite material

[0029] Dimensions: Thickness 1.5-3mm, mounting groove spacing tolerance ±0.2mm, groove depth ≥ 2 / 3 of the sound-absorbing cotton thickness.

[0030] Mounting slot design: adopts a dovetail groove structure, with a groove width tolerance of ±0.1mm.

[0031] Surface treatment: Must meet RoHS environmental standards, with a surface roughness Ra ≤ 3.2 μm.

[0032] Sealing strip

[0033] Material parameters: EPDM rubber, compression set ≤25%

[0034] Cross-sectional dimensions: Trapezoidal structure

[0035] Installation requirements: Pre-compression ≥15%, temperature range -40℃ to 120℃

[0036] II. Key Points for Implementing Sound-Absorbing Cotton Components

[0037] Multi-layer structure

[0038] Layer thickness configuration: base layer + damping layer + microporous layer

[0039] Density gradient: 120 kg / m³ from the outside to the inside 3 →80kg / m 3 →150kg / m 3

[0040] Buckle structure: adopts two-way positioning buckle.

[0041] Environmentally friendly adhesives

[0042] Technical specifications: Water-based polyurethane adhesive

[0043] Curing parameters: Initial tack time at room temperature ≤ 3 min, complete curing time ≤ 24 h

[0044] Shear strength: ≥1.5MPa

[0045] III. Key Points for Implementing the Connection System

[0046] Connector plate assembly

[0047] Material: SPCC cold-rolled steel plate

[0048] Structural dimensions: The length of the connecting plate matches the length of the clamping plate with a tolerance of ±1mm.

[0049] Hook parameters: Features a flexible hook design.

[0050] Hook and match

[0051] Positioning accuracy: Center distance tolerance of mounting holes ±0.3mm

[0052] Fit clearance: Single-sided clearance ≤ 0.15mm

[0053] Vibration resistance: Meets GB / T 2423.10 standard.

[0054] IV. Performance Verification Parameters

[0055] Sealing index

[0056] Air tightness: Leakage ≤ 0.5 L / (m³) under a pressure difference of 2000 Pa. 2 ·min)

[0057] Water tightness: IPX7 rating

[0058] acoustic performance

[0059] Noise reduction coefficient: ≥0.85

[0060] Sound insulation: Average sound insulation ≥28dB in the 125-4000Hz frequency band

[0061] Environmental characteristics

[0062] Formaldehyde emission: ≤0.03mg / m³ 3

[0063] Odor rating: ≤3

[0064] V. Adjustable Assembly Scheme

[0065] Thickness adjustment mechanism

[0066] Standard thickness of a single-layer unit: 25mm ± 0.5mm

[0067] Superimposed tolerance control: Thickness error ≤ ±0.8mm for each additional unit.

[0068] Maximum number of stacking layers: ≤3 layers

[0069] Quick-assembly design

[0070] Installation and removal force: Single-point insertion and extraction force 5-8N

[0071] Number of reuses: ≥200 times

[0072] The following are supplementary explanations regarding existing technical solutions and implementation methods involved in this plan, to ensure the completeness and feasibility of the technical solution:

[0073] I. Clamping Unit Implementation Technology

[0074] Clamping plate mechanical structure

[0075] Dovetail groove installation technology: The dovetail groove fitting method in GB / T 3478.1-2008 standard is adopted. The bottom of the groove is set with anti-slip texture. The sound-absorbing cotton is quickly positioned and fixed by pneumatic pressing equipment. The pressing pressure is set to 0.4-0.6MPa.

[0076] Surface treatment process: In accordance with the automotive industry standard Q / JLY J7110535B-2022, trivalent chromium passivation treatment is adopted to meet the requirement of no corrosion in the 480h salt spray test.

[0077] Sealing strip assembly technology

[0078] Rubber compression process: Based on the SAE J200 rubber material classification standard, in-mold vulcanization molding technology is used, with a compression rebound rate of ≥85%. 3M is used during installation. TM Scotch-Weld TM EC-2216 adhesive pre-coating for fixation.

[0079] II. Sound-absorbing cotton composite technology

[0080] Multilayer composite process

[0081] Lamination equipment: A continuous hot press laminating machine is used, with a set temperature gradient, linear pressure of 8-10 kN / m, and lamination speed of 2 m / min.

[0082] Snap-on positioning technology: Adopting the ISO 1207 standard metric snap-on specifications, the snap-on protrusion is made of POM material, and the groove is embedded with a copper guide plate. When inserting, a laser positioning instrument is used to ensure alignment accuracy of ±0.1mm.

[0083] Application of environmentally friendly adhesives

[0084] Coating process: A slot coater is used, and the coating amount is controlled at 80±5g / m². 2 During the curing stage, a UV-LED light source is used to accelerate the reaction, in accordance with DIN EN 204 durability level D3 standard.

[0085] III. Modular Connection System

[0086] Hook connection technology

[0087] Elastic hook manufacturing: JIS G 3141 cold-rolled steel sheet is used for multi-station progressive die stamping. The hook part is locally high-frequency quenched. The hook hole is machined with GB / T 1804-m grade precision.

[0088] Vibration compensation design: EPDM damping pads are added between the connecting plate and the clamping plate, and the vibration isolation efficiency is tested in accordance with ISO 10846-3.

[0089] IV. Installation and Maintenance Operations

[0090] Vehicle installation process

[0091] Pre-installation positioning: A magnetic positioning fixture is used to attach to the vehicle body sheet metal, and the installation baseline is projected by a laser projector.

[0092] Tightening operation: Use a torque-limited electric screwdriver, set the torque range to 1.2-1.8 N·m, and tighten in three crisscrossing steps.

[0093] Repair and replacement solutions

[0094] Quick disassembly tool: Comes with a dedicated disassembly pry bar. Apply separation force perpendicular to the clamping plate. Residual adhesive after disassembly can be removed through 3M. TM Citrus Base Cleaner solvent removal.

[0095] V. Environmental Adaptability Design

[0096] Temperature compensation mechanism

[0097] A thermal expansion gap of 0.3 mm / m is reserved between the clamping plate and the sound-absorbing cotton, and the deformation stress is absorbed by the silicone buffer strip under extreme temperatures.

[0098] Antifouling treatment technology

[0099] The sound-absorbing cotton is coated with a nano-hydrophobic coating using plasma-enhanced chemical vapor deposition technology. The film thickness is 200nm±20 and the surface resistance is ≤1×109Ω.

[0100] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A high sealing sound absorbing cotton for environment-friendly vehicles, characterized in that: It includes at least one set of clamping units (1) and several sound-absorbing cotton (2). The clamping unit (1) is composed of two clamping plates arranged opposite each other. Several sound-absorbing cotton (2) are placed between the two clamping plates of the same set of clamping units (1). Adjacent sound-absorbing cotton (2) are detachably connected. Adjacent clamping units (1) are also connected by a detachable connection to realize the overall sound-absorbing cotton (2) device with adjustable thickness assembly and high sealing and environmental protection functions. ​ 2. The high-sealing environmentally friendly automotive sound-absorbing cotton according to claim 1, characterized in that: The clamping plate has a rectangular plate structure and several mounting grooves (3) are provided on its surface. The mounting grooves (3) are evenly distributed along the length of the clamping plate to fix the sound-absorbing cotton (2) between the two clamping plates.

3. The high-sealing environmentally friendly automotive sound-absorbing cotton according to claim 1, characterized in that: The sound-absorbing cotton (2) comprises multiple layers of cotton with different thicknesses, which are bonded and fixed together by an adhesive. The adhesive is an environmentally friendly water-based adhesive to ensure the environmental performance of the sound-absorbing cotton (2). The edges of adjacent sound-absorbing cotton (2) are provided with a buckle structure and a slot structure that cooperate with each other. The buckle structure and the slot structure are inserted and cooperated to realize the detachable connection between adjacent sound-absorbing cotton (2).

4. The high-sealing environmentally friendly automotive sound-absorbing cotton according to claim 1, characterized in that: The two adjacent clamping units (1) are connected by a connector. The connector includes a connecting plate and connecting hooks at both ends of the connecting plate. The connecting hooks cooperate with the hanging holes on the clamping plate to connect the two adjacent clamping units (1) into one unit, thereby enhancing the stability and sealing of the overall device.

5. The high-sealing environmentally friendly automotive sound-absorbing cotton according to claim 1, characterized in that: The clamping plate has a sealing strip structure (4) on its inner edge. The sealing strip structure (4) is made of flexible rubber. When the clamping plate clamps the sound-absorbing cotton (2), the sealing strip structure (4) fits tightly against the side of the sound-absorbing cotton (2), further improving the sealing performance of the sound-absorbing cotton (2) device.

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