A damping structure for reducing fuel sloshing noise

Abstract

The present application relates to a kind of damping structure for reducing fuel sloshing noise, including filamentous fluffy structure, plastic screw and plastic nut, plastic screw passes through filamentous fluffy structure, nut is sleeved on back, compression heat sealing fixation is carried out, the overall structure design of this technical scheme is compact, ingenious, easy to realize, uses flexible fluffy structure, reduces manufacturing cost, increases the degree of freedom of design.

Description

Technical Field

[0001] This invention relates to a damping structure, specifically a damping structure for reducing fuel sloshing noise, and belongs to the technical field of fuel tank structural components. Background Technology

[0002] With the rapid development and application of hybrid vehicle technology, many technical requirements are now higher than those for traditional gasoline vehicles. Comfort is a particularly prominent requirement, and fuel tank sloshing noise in hybrid vehicles is a key concern. Traditional solutions to fuel tank sloshing noise involve adding vertical or horizontal baffles inside the fuel tank; however, in some projects, adding these baffles has not solved the noise problem and has even exacerbated it.

[0003] Analyzing the mechanism of noise generation, ordinary wave barriers only serve to disturb the water flow, or even redirect the water flow to other areas, thus reducing the noise sound pressure level. However, this process continues, so the noise problem is not fundamentally solved. Summary of the Invention

[0004] This invention addresses the technical problems existing in the prior art by providing a damping structure to reduce fuel sloshing noise. This solution is ingeniously designed and compact in structure. The solution adds a device on the upper and / or side walls inside the fuel tank that can weaken or directly eliminate sloshing, thus completely solving the sloshing noise problem.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a damping structure for reducing fuel sloshing noise, comprising a filamentous loose structure, a plastic screw and a plastic nut, wherein the plastic screw passes through the filamentous loose structure and the nut is fitted on the back side for compression heat sealing.

[0006] As an improvement of the present invention, the top of the plastic screw is provided with a pitted structure to facilitate connection with the inner wall of the oil tank.

[0007] As an improvement to this invention, the stud position of the plastic screw is provided with a barb structure to facilitate the installation of subsequent accessories. A circular hole is provided in the filamentous, fluffy structure, the diameter of which exceeds that of the barb structure, and a non-welding method is used to fix the fluffy structure.

[0008] As an improvement to this invention, the filamentous loose structure is made of PE, PA, or other fuel-resistant materials, wound into filaments; the plastic screw is injection molded from PE material. The two parts are connected by heat sealing. First, the screw is passed through where screw connection is required, then a nut is placed on the back, and compression heat sealing is performed. Because the filamentous loose structure is formed by winding filaments, its shape is easier to conform to the inner wall of the fuel tank.

[0009] As an improvement of the present invention, the filamentous fluffy structure is formed by winding filamentous structures, resulting in a compact overall structure, non-loose materials, and an interior full of pores, allowing liquids to freely enter and flow out.

[0010] As an improvement of the present invention, the filamentous loose structure is compacted around its perimeter and the materials are heat-sealed together by welding to form an edge. A localized area in the center of the filamentous loose structure is also compacted and heat-sealed together; this facilitates fixation and prevents the fiber bundles from loosening.

[0011] Compared with the prior art, the present invention has the following advantages: 1) The overall structure of the technical solution is compact, ingenious and easy to implement. The use of a flexible and fluffy structure reduces manufacturing costs and increases design freedom; 2) The fluffy structure is cut from large pieces, does not require special tooling molds, has greater conformability, acts as a patch, and is low in cost; 3) Since the filamentous fluffy structure is formed by winding filamentous structures, its shape is easier to fit the inner wall of the fuel tank, and the fit with the fuel tank is better. It can be used as a supplementary solution for the baffle plate to further reduce noise. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a plastic screw structure.

[0013] Figure 2 This is a schematic diagram of the entire damping structure.

[0014] Figure 3 This is a cross-sectional view of the damping structure.

[0015] Figure 4 This is a cross-sectional view of the entire damping structure;

[0016] Figure 5 This is a schematic diagram of the plastic screw structure in Example 2;

[0017] Figure 6 This is a cross-sectional view of the damping structure in Example 2.

[0018] Figure 7 This is a cross-sectional view of the entire damping structure in Example 2.

[0019] In the picture: 1. Plastic screw, 2. Plastic nut, 3. Filamentous structure, 4. Pitting, 5. Barbed structure. Detailed Implementation

[0020] To enhance understanding of the present invention, the embodiments will be described in detail below with reference to the accompanying drawings.

[0021] Example 1: See Figures 1-4 A damping structure for reducing fuel sloshing noise includes a filamentous fluffy structure 3, a plastic screw 1, and a plastic nut 2. See [link to relevant documentation]. Figure 3The plastic screw passes through the filamentous and fluffy structure, and a plastic nut 2 is put on the back for compression and heat sealing. The top of the plastic screw is provided with a pitted structure 4 to facilitate connection with the inner wall of the oil tank.

[0022] The filamentous, fluffy structure is made of PE or PA material, wound into filaments; the plastic screws and washers are injection molded from PE material. The two parts are joined by heat sealing. First, the screw is inserted where it needs to be connected, then a nut is placed on the back, and compression heat sealing is performed.

[0023] See Figure 3 The solution uses plastic nuts, which are characterized by having a hole in the middle to be pressed into the screw; ultrasonic welding is used to weld the contact surfaces of the screw, the loose material, and the nut together.

[0024] Weld screws through the fluffy material, ensuring that the internal fibers of the fluffy material are not damaged during the process.

[0025] During the production of the fuel tank, a robotic arm grabs the protruding part of the screw and inserts the loose material assembly into the inside of the fuel tank, allowing the pitted part to connect with the inner wall of the fuel tank.

[0026] The filamentous, fluffy structure is compact, the material is not loose, and the interior is full of pores, allowing liquids to enter and flow out freely.

[0027] The filamentous, fluffy structure is compacted and heat-sealed around its perimeter; a localized section in the center of the filamentous, fluffy structure is also compacted and heat-sealed, facilitating fixation and preventing the fiber bundles from becoming loose.

[0028] Example 2: See Figures 5-7 A damping structure for reducing fuel sloshing noise includes a filamentous loose structure 3, a plastic screw 1, and a plastic nut 2. The plastic screw passes through the filamentous loose structure, and the nut is fitted onto its back for compression and heat sealing. The top of the plastic screw has a pitted structure 4 for easy connection to the inner wall of the fuel tank. The stud of the plastic screw has a barbed structure 5 for easy installation of subsequent accessories. A circular hole is provided in the filamentous loose structure, extending beyond the barbed structure, for non-welding fixation of the loose structure. The remaining structure and advantages are exactly the same as in Example 1.

[0029] It should be noted that the above embodiments are not intended to limit the scope of protection of the present invention. Equivalent transformations or substitutions made based on the above technical solutions all fall within the scope of protection of the claims of the present invention.

Claims

1. A damping structure for reducing fuel sloshing noise, characterized in that, It includes a filamentous, fluffy structure, a plastic screw, and a plastic nut, with the plastic screw passing through the filamentous, fluffy structure. Place a nut on the back and then heat-seal it to secure it.

2. The damping structure for reducing fuel sloshing noise according to claim 1, characterized in that, The top of the plastic screw has a pitted texture.

3. The damping structure for reducing fuel sloshing noise according to claim 1 or 2, characterized in that, The plastic screw has a barbed structure at the stud position, and a round hole is set in the filamentous loose structure. The diameter of the round hole is larger than that of the barbed structure. The loose structure is fixed in a non-welding mode.

4. The damping structure for reducing fuel sloshing noise according to claim 1 or 2, characterized in that, The filamentous and fluffy structure is made of PE or PA material in the form of filaments that are wound together; the plastic screw is made of PE material by injection molding.

5. The damping structure for reducing fuel sloshing noise according to claim 1 or 2, characterized in that, The filamentous, fluffy structure is filled with pores, allowing liquid to freely enter and flow out.

6. The damping structure for reducing fuel sloshing noise according to claim 1 or 2, characterized in that, The filamentous, fluffy structure is compacted around the edges and the materials are heat-sealed together using a welding process to form an edging. In some areas in the middle of the filamentous, fluffy structure, the material is compacted and heat-sealed together.

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