Automobile NVH polyurethane sound insulation and cushioning mechanism

Abstract

The utility model relates to the technical field of automobile sound insulation and buffering, especially to a kind of automobile NVH polyurethane sound insulation and buffering mechanism, including reinforcing bar, the reinforcing bar surface is fixed with a plurality of damping mechanism, the damping mechanism one side is fixed with reinforcing plate, the reinforcing plate one side is fixed with polyurethane cover, damping mechanism slides in the sliding of slider in cylinder, utilize the resistance generated by damping oil, can effectively dissipate impact energy, reduce the amplitude and frequency of vibration, the combination design of polyurethane cover and honeycomb board, further absorb and isolate vibration energy, reduce the propagation of noise to the inside of door, non-newtonian fluid layer can quickly change the viscosity of fluid when being impacted, according to different impact intensity adaptive adjustment, further improve sound insulation and buffering effect.

Description

Technical Field

[0001] This utility model relates to the field of automotive sound insulation and damping technology, specifically to an automotive NVH polyurethane sound insulation and damping mechanism. Background Technology

[0002] With the rapid development of the automotive industry, consumers have increasingly higher demands for the comfort and quietness of automobiles. NVH (noise, vibration, and harshness) performance has become one of the important indicators for measuring vehicle quality. As a crucial component of a car, the NVH performance of the door significantly impacts the overall comfort of the vehicle interior. However, traditional door structures have many shortcomings in vibration and noise control, mainly in the following aspects: Traditional car door structures typically employ simple metal frames and thin sheet metal designs, which are prone to deformation and vibration when subjected to external impacts. Due to insufficient structural strength, impact energy cannot be effectively dispersed.

[0003] The sound insulation materials inside car doors are usually quite basic, often consisting of simple sponge or rubber pads. While these materials offer some sound insulation, they are ineffective at blocking high-frequency noise and impact noise. For example, wind noise and road noise during driving significantly reduce comfort inside the car.

[0004] Therefore, a polyurethane sound insulation and damping mechanism for automotive NVH is needed to improve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to provide an automotive NVH polyurethane sound insulation buffer mechanism to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a polyurethane sound insulation buffer mechanism for automotive NVH, comprising reinforcing ribs, wherein a plurality of damping mechanisms are fixedly disposed on the surface of the reinforcing ribs, a reinforcing plate is fixedly disposed on one side of the damping mechanism, and a polyurethane sleeve is fixedly disposed on one side of the reinforcing plate.

[0007] As a preferred embodiment of this utility model, a honeycomb panel is fixedly provided on the inner side of the polyurethane sleeve, the honeycomb panel is hollow inside, and a non-Newtonian fluid layer is filled inside the honeycomb panel.

[0008] As a preferred embodiment of this utility model, the reinforcing plate is an aluminum alloy plate or a hot-formed steel plate, and the thickness of the reinforcing plate is greater than 3 mm.

[0009] As a preferred embodiment of this utility model, the reinforcing ribs are arranged in a cross pattern, and the two ends of the reinforcing ribs are fixedly connected to the door anti-collision beam by bolts.

[0010] As a preferred embodiment of this utility model, the damping mechanism includes a cylinder, a slider is slidably disposed inside the cylinder, and damping oil is disposed inside the cylinder.

[0011] As a preferred embodiment of this utility model, the upper end of the slider is fixedly provided with a movable rod, and the surface of the slider is provided with a through hole.

[0012] As a preferred embodiment of this utility model, the cylinder is fixedly connected to the reinforcing rib, the movable rod is fixedly connected to the reinforcing plate, and a spring is sleeved on the outside of the movable rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model features a cross-shaped arrangement of reinforcing ribs, with both ends fixedly connected to the door anti-collision beam by bolts. This structure can effectively disperse and transmit impact force, preventing the door from deforming or being damaged due to concentrated force. The reinforcing plate is made of aluminum alloy plate or hot-formed steel plate with a thickness greater than millimeters, further enhancing the structural strength of the door and ensuring that the door remains stable when subjected to a large impact.

[0014] 2. The damping mechanism of this utility model can effectively dissipate impact energy and reduce the amplitude and frequency of vibration by using the resistance generated by the damping oil through the sliding of the slider in the cylinder. The combined design of polyurethane sleeve and honeycomb panel further absorbs and isolates vibration energy, reducing the transmission of noise into the car door. The non-Newtonian fluid layer can quickly change the viscosity of the fluid when it is impacted, and adaptively adjusts according to different impact intensities, further improving the sound insulation and buffering effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall three-dimensional front structure of this utility model; Figure 2 This is a schematic diagram of the overall three-dimensional back structure of this utility model; Figure 3 This is a schematic diagram of the overall front structure of this utility model; Figure 4 This is a schematic diagram of the overall rear structure of this utility model; Figure 5 This is a schematic diagram of the overall side structure of this utility model; Figure 6 This is a schematic diagram showing the overall and partial enlarged structure of this utility model; Figure 7 This is a schematic diagram of the damping mechanism of this utility model.

[0016] In the diagram: 1. Polyurethane sleeve; 2. Reinforcing plate; 3. Damping mechanism; 4. Reinforcing rib; 5. Non-Newtonian fluid layer; 6. Honeycomb panel; 7. Movable rod; 8. Through hole; 9. Slider; 10. Cylinder; 11. Spring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0018] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below with reference to relevant embodiments. Several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] 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 is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Please see Figure 1-7 This utility model provides a technical solution: a polyurethane sound insulation and buffer mechanism for automotive NVH, including a reinforcing rib 4, a plurality of damping mechanisms 3 fixedly disposed on the surface of the reinforcing rib 4, a reinforcing plate 2 fixedly disposed on one side of the damping mechanism 3, and a polyurethane sleeve 1 fixedly disposed on one side of the reinforcing plate 2. When the car door is subjected to external impact or vibration, the reinforcing rib 4 bears the main force first; the reinforcing rib 4 is arranged in a cross pattern, which can effectively disperse and transmit impact force and avoid concentrated force leading to damage to the car door structure; The two ends of the reinforcing rib 4 are fixedly connected to the door anti-collision beam by bolts. This connection method further enhances the overall structural strength of the door and ensures that when subjected to a large impact, the impact force can be transmitted to other parts of the vehicle body through the anti-collision beam, thereby protecting the internal structure of the door.

[0022] As an example of this utility model, a honeycomb panel 6 is fixedly provided on the inner side of the polyurethane sleeve 1. The honeycomb panel 6 is hollow inside and filled with a non-Newtonian fluid layer 5. A polyurethane sleeve 1 is fixedly provided on one side of the reinforcing plate 2. The polyurethane sleeve 1 has good sound insulation and buffering performance. When the impact force is transmitted to the reinforcing plate 2 through the damping mechanism 3, the polyurethane sleeve 1 can further absorb and isolate the vibration energy, reducing the transmission of noise to the inside of the car door. The honeycomb panel 6 has a good energy absorption and sound insulation effect; its internal hollow structure can effectively disperse the impact force, and the non-Newtonian fluid layer 5 will undergo nonlinear deformation when subjected to external force, further absorbing and dissipating energy. The properties of non-Newtonian fluids allow them to rapidly change viscosity when subjected to impact, thus better adapting to different impact intensities and further enhancing sound insulation and cushioning effects.

[0023] As an example of this utility model, the reinforcing plate 2 is an aluminum alloy plate or a hot-formed steel plate, the thickness of the reinforcing plate 2 is greater than 3 mm, the movable rod 7 is fixed on the upper end of the slider 9 and is fixedly connected to the reinforcing plate 2; through the movement of the movable rod 7, the damping mechanism 3 can evenly transmit the impact force to the reinforcing plate 2, further dispersing the range of force action; The reinforcing plate 2 is made of aluminum alloy or hot-formed steel with a thickness greater than 3 mm. This choice of material and thickness gives the reinforcing plate 2 high strength and rigidity, which can effectively support the internal structure of the door and prevent deformation caused by impact or vibration.

[0024] As an example of this utility model, the reinforcing ribs 4 are arranged in a cross pattern, and the two ends of the reinforcing ribs 4 are fixedly connected to the door anti-collision beam by bolts.

[0025] As an example of this utility model, the damping mechanism 3 includes a cylinder 10, a slider 9 is slidably provided inside the cylinder 10, and damping oil is provided inside the cylinder 10. The damping mechanism 3 plays a key buffering role in the process of vibration and impact. The damping mechanism 3 includes a cylinder 10, a slider 9 is slidably provided inside the cylinder 10, and damping oil is provided inside the cylinder 10. When the car door is impacted, the impact force is transmitted to the damping mechanism 3 through the reinforcing rib 4; the slider 9 slides inside the cylinder 10, and the damping oil generates resistance through the through hole 8 on the surface of the slider 9, thereby consuming the impact energy; this damping effect can effectively reduce the amplitude and frequency of vibration and reduce the noise level inside the car door.

[0026] As an example of this utility model, the upper end of the slider 9 is fixedly provided with a movable rod 7, and the surface of the slider 9 is provided with a through hole 8.

[0027] As an example of this utility model, the cylinder 10 is fixedly connected to the reinforcing rib 4, the movable rod 7 is fixedly connected to the reinforcing plate 2, and a spring 11 is sleeved on the outside of the movable rod 7.

[0028] Working principle: When the car door is subjected to external impact or vibration, the main force is first borne by the reinforcing rib 4; the reinforcing rib 4 is arranged in a cross pattern, which can effectively disperse and transmit the impact force and avoid concentrated force that could damage the car door structure. The two ends of the reinforcing rib 4 are fixedly connected to the door anti-collision beam by bolts. This connection method further enhances the overall structural strength of the door and ensures that when subjected to a large impact, the impact force can be transmitted to other parts of the vehicle body through the anti-collision beam, thereby protecting the internal structure of the door. The damping mechanism 3 plays a crucial buffering role during vibration and impact; the damping mechanism 3 includes a cylinder 10, a slider 9 is slidably provided inside the cylinder 10, and damping oil is provided inside the cylinder 10. When the car door is impacted, the impact force is transmitted to the damping mechanism 3 through the reinforcing rib 4; the slider 9 slides inside the cylinder 10, and the damping oil generates resistance through the through hole 8 on the surface of the slider 9, thereby consuming the impact energy; this damping effect can effectively reduce the amplitude and frequency of vibration and reduce the noise level inside the car door. The movable rod 7 is fixed to the upper end of the slider 9 and is fixedly connected to the reinforcing plate 2; through the movement of the movable rod 7, the damping mechanism 3 can evenly transmit the impact force to the reinforcing plate 2, further dispersing the range of force action; The reinforcing plate 2 is made of aluminum alloy or hot-formed steel with a thickness greater than 3 mm. This choice of material and thickness gives the reinforcing plate 2 high strength and rigidity, which can effectively support the internal structure of the door and prevent deformation caused by impact or vibration. A polyurethane sleeve 1 is fixedly installed on one side of the reinforcing plate 2. The polyurethane sleeve 1 has good sound insulation and buffering performance. When the impact force is transmitted to the reinforcing plate 2 through the damping mechanism 3, the polyurethane sleeve 1 can further absorb and isolate the vibration energy, reducing the transmission of noise to the inside of the door. The honeycomb panel 6 has a good energy absorption and sound insulation effect; its internal hollow structure can effectively disperse the impact force, and the non-Newtonian fluid layer 5 will undergo nonlinear deformation when subjected to external force, further absorbing and dissipating energy. The properties of non-Newtonian fluids allow them to rapidly change viscosity when subjected to impact, thus better adapting to different impact intensities and further improving sound insulation and cushioning effects. Through the structural support of the reinforcing rib 4, the energy dissipation of the damping mechanism 3, the structural support and sound insulation of the reinforcing plate 2, and the synergistic effect of the honeycomb plate 6 and the non-Newtonian fluid layer 5, this device can effectively reduce the vibration and noise inside the car door. This multi-layered design not only enhances the impact resistance of the doors but also significantly improves the NVH performance inside the vehicle, providing a more comfortable and quiet driving environment for passengers.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polyurethane sound insulation and buffer mechanism for automotive NVH, comprising reinforcing ribs (4), characterized in that: The reinforcing rib (4) has several damping mechanisms (3) fixedly installed on its surface. A reinforcing plate (2) is fixedly installed on one side of the damping mechanism (3). A polyurethane sleeve (1) is fixedly installed on one side of the reinforcing plate (2). A honeycomb plate (6) is fixedly installed inside the polyurethane sleeve (1). The honeycomb plate (6) is hollow inside and is filled with a non-Newtonian fluid layer (5).

2. The automotive NVH polyurethane sound insulation buffer mechanism according to claim 1, characterized in that: The reinforcing plate (2) is an aluminum alloy plate or a hot-formed steel plate, and the thickness of the reinforcing plate (2) is greater than 3 mm.

3. The automotive NVH polyurethane sound insulation buffer mechanism according to claim 2, characterized in that: The reinforcing ribs (4) are arranged in a cross pattern, and the two ends of the reinforcing ribs (4) are fixedly connected to the door anti-collision beam by bolts.

4. The automotive NVH polyurethane sound insulation buffer mechanism according to claim 3, characterized in that: The damping mechanism (3) includes a cylinder (10), a slider (9) is slidably provided inside the cylinder (10), and damping oil is provided inside the cylinder (10).

5. The automotive NVH polyurethane sound insulation buffer mechanism according to claim 4, characterized in that: The upper end of the slider (9) is fixedly provided with a movable rod (7), and the surface of the slider (9) is provided with a through hole (8).

6. The automotive NVH polyurethane sound insulation buffer mechanism according to claim 5, characterized in that: The cylinder (10) is fixedly connected to the reinforcing rib (4), the movable rod (7) is fixedly connected to the reinforcing plate (2), and a spring (11) is sleeved on the outside of the movable rod (7).

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