A wheel hub noise reduction sound absorption structure

Abstract

The utility model relates to the technical field of automobile parts, disclose a wheel hub noise reduction sound absorption structure, including sound absorption mouth, wheel hub includes the rim and the spoke, the rim and the spoke's junction place is opened with sound absorption mouth hole and sound absorption cavity from outside to inside in proper order, sound absorption mouth can be detachably arranged in sound absorption mouth hole, and sound absorption mouth hole and sound absorption cavity are communicated. Sound absorption mouth includes the sound collecting pipe coaxial connection with the sound guide pipe, and the sound collecting pipe actively absorbs tire noise wave and will be absorbed tire noise wave into the sound guide pipe, and tire noise wave enters into the sound absorption cavity through the sound guide pipe, under the action of sound absorption mouth and sound absorption cavity, tire noise wave carries out the head-on cancellation in the wheel hub, and reaches the noise reduction sound absorption effect of tire noise wave of different frequency through replacing the sound absorption mouth of different inner diameter.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a wheel hub noise reduction and sound absorption structure. Background Technology

[0002] With the rapid development and progress of the automotive era, the demand for quietness in new energy vehicles is also increasing. Existing methods for reducing vehicle noise often involve filling the tires with sound-absorbing materials (such as sound-absorbing cotton) to reduce tire noise waves.

[0003] Sound-absorbing cotton mainly relies on adhesives to fix it inside car tires. However, this fixing method and filling material are not adjustable and are easily affected by external impacts, causing them to change position or fall off. With long-term use, they will deform and fall off due to aging, wear, and extreme temperature and humidity.

[0004] Traditional aluminum alloy wheels often use a one-piece solid structure made of casting or forging, which results in high energy consumption and cannot be adapted to complex structural optimizations. This leads to material redundancy and fails to meet the lightweight requirements of new energy vehicles. Cast rims are often prone to cracking upon impact due to defects such as shrinkage porosity and air bubbles, which further leads to the shedding of sound-absorbing materials. Therefore, a stable, safe, and more flexible wheel hub noise reduction and sound absorption structure is needed. Summary of the Invention

[0005] In order to improve the noise reduction and sound absorption stability and reliability of existing wheel hubs, this utility model provides a wheel hub noise reduction and sound absorption structure.

[0006] This utility model provides a wheel hub noise reduction and sound absorption structure, which adopts the following technical solution: A noise reduction and sound absorption structure for a wheel hub includes a sound-absorbing nozzle. The wheel hub includes a rim and spokes. A sound-absorbing nozzle hole and a sound-absorbing cavity are sequentially opened from the outside to the inside at the junction of the rim and the spokes. The sound-absorbing nozzle is detachably installed in the sound-absorbing nozzle hole, and the sound-absorbing nozzle hole and the sound-absorbing cavity are connected.

[0007] By adopting the above technical solution, the tire noise waves are offset and canceled out in the wheel hub under the action of the sound-absorbing nozzle and the sound-absorbing cavity. Furthermore, the noise reduction and sound absorption effect of tire noise waves of different frequencies can be achieved by replacing the sound-absorbing nozzle with a different inner diameter.

[0008] Optionally, the sound-absorbing nozzle includes a sound-receiving tube coaxially connected to the sound guide tube.

[0009] By adopting the above technical solution, the sound-absorbing tube actively absorbs tire noise waves and transmits the absorbed tire noise waves into the sound-conducting tube, and the tire noise waves enter the sound-absorbing cavity through the sound-conducting tube.

[0010] Optionally, the sound guide tube is fixed to the sound-absorbing nozzle hole with an interference fit.

[0011] By adopting the above technical solution, the sound guide tube is firmly fixed in the sound-absorbing nozzle hole due to the interference fit, ensuring that the sound-absorbing nozzle will not easily fall off during vehicle operation.

[0012] Optionally, a snap-fit ​​ring is fixedly connected to the outside of the sound guide tube, and the snap-fit ​​ring is tightly connected to the inner wall of the sound-absorbing cavity.

[0013] By adopting the above technical solution, the snap ring maximizes the tightness and firmness of the connection between the sound guide tube and the sound-absorbing cavity.

[0014] Optionally, a sound-absorbing cavity is provided inside the rim of the wheel.

[0015] By adopting the above technical solution, the design of the sound-absorbing cavity makes the wheel rim hollow, thereby making the wheel hub lighter. At the same time, the sound-absorbing cavity can also alleviate some of the pressure of tire noise waves.

[0016] Optionally, the sound-absorbing nozzle is made of aluminum or rubber.

[0017] By adopting the above technical solution, the sound-absorbing nozzle can be made of different materials according to different driving environments and driving conditions, thereby achieving a better noise reduction and sound absorption effect.

[0018] Optionally, a sound-absorbing groove is provided in the sound-absorbing cavity near the sound-absorbing nozzle hole.

[0019] By adopting the above technical solution, the sound-absorbing groove can buffer and store the tire noise waves absorbed by the sound-absorbing cavity.

[0020] Optionally, a plurality of the sound-absorbing nozzles are evenly arranged with the center of the wheel rim as the center of symmetry.

[0021] By adopting the above technical solution, the uniform arrangement of the sound-absorbing nozzles can ensure the sound absorption effect without disrupting the wheel hub's motion balance, and reduce the hidden dangers of uneven wheel hub weight distribution.

[0022] Optionally, the side of the sound guide tube away from the sound receiver tube has multiple sound-diffusing holes.

[0023] By adopting the above technical solution, the sound-diffusing hole actively disperses and captures tire noise waves, so that the tire noise waves are dispersed and reduced during the process of being absorbed into the sound-absorbing cavity, thereby reducing the pressure that the sound-absorbing cavity bears on the tire noise waves.

[0024] In summary, this application includes at least one of the following beneficial technical effects: (1) This utility model actively captures and absorbs tire noise waves through the sound-absorbing nozzle. When the tire noise wave propagates to the sound-absorbing cavity, the tire noise wave will form an alternating change of compression and sparsity in the sound-absorbing nozzle, causing the air column in the sound-absorbing nozzle to vibrate. This causes the tire noise wave to be counteracted in the sound-absorbing cavity and finally absorbed by the wheel rim, thus greatly reducing tire noise. Furthermore, by replacing the sound-absorbing nozzle with different inner diameters, the noise reduction and sound absorption effect of tire noise waves of different frequencies can be achieved. It can adapt to different road conditions, environments and functional requirements, and realize the adjustable effect of wheel hub noise reduction and sound absorption.

[0025] (2) The design of the sound-absorbing cavity in this utility model makes the wheel flange hollow, thereby making the wheel hub lighter and avoiding additional wear and load on the car, thus avoiding weight increase. At the same time, the sound-absorbing cavity can also absorb a certain amount of tire noise wave energy.

[0026] (3) The sound-absorbing nozzles in this utility model are evenly arranged with the center of the wheel rim as the center of symmetry. They can ensure the sound absorption effect without disrupting the balance of the wheel hub, reduce the hidden danger of uneven wheel hub weight distribution, and provide a better driving experience during vehicle operation. Moreover, the number of sound-absorbing nozzles can be flexibly configured and replaced according to actual needs, which is quite practical.

[0027] (4) The design of the sound-diffusing hole in this utility model realizes the active dispersion and capture of tire noise waves, so that the tire noise waves are dispersed and reduced during the process of being absorbed into the sound-absorbing cavity, reducing the pressure of the sound-absorbing cavity on the tire noise waves, and preventing the sound-absorbing cavity from being unable to receive a large amount of tire noise waves in a short period of time, thus causing the tire noise waves to overflow. Attached Figure Description

[0028] Figure 1 This is a schematic cross-sectional view of the wheel hub noise reduction and sound absorption structure in this utility model; Figure 2 yes Figure 1 An enlarged schematic diagram of part A in the middle; Figure 3 This is a schematic diagram of the wheel hub structure; Figure 4 This is a cross-sectional schematic diagram of the installation structure of the rubber sound-absorbing nozzle in this utility model; Figure 5 This is a schematic diagram of the sound-diffusing hole of the sound-absorbing nozzle in this utility model.

[0029] Reference numerals in the attached diagram: 1. Wheel hub; 2. Sound-absorbing nozzle hole; 3. Sound-absorbing cavity; 4. Sound-absorbing nozzle; 5. Sound-absorbing chamber; 11. Wheel rim; 12. Wheel spoke; 31. Sound-absorbing groove; 41. Sound-receiving tube; 42. Sound guide tube; 43. Snap-fit ​​ring; 44. Sound-diffusing hole. Detailed Implementation

[0030] The embodiments of this application are described in detail below, and examples of the embodiments are shown in the accompanying drawings.

[0031] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] This application discloses a noise reduction and sound absorption structure for a wheel hub, as shown in the accompanying drawings. Figure 1 , Figure 3 As shown, this invention includes a 20X9.5J aluminum alloy wheel for new energy vehicles, designed with a hollow rim as its core. The wheel includes a wheel hub 1 and a sound-absorbing nozzle 4. The wheel hub 1 includes a rim 11 and spokes 12. The rim 11 is made of 6061-T6 rolled aluminum alloy sheet with a thickness of 8.0mm, rolled into a circle and butt-welded. It is then spun into a hollow rim structure and subjected to T6 solution treatment and aging treatment for overall heat treatment. The sound-absorbing cavity 5 inside the hollow rim structure is a continuous cavity. The volume of the cavity inside the rim accounts for about 20% of the cross-sectional area of ​​the rear rim of the rim 11, and the wall thickness is reduced to 3.5-5.2mm.

[0033] A sound-absorbing cavity 3 is provided at the junction of the rim 11 and the spokes 12. A Helmholtz resonance cavity is formed at the junction of the rim 11 and the spokes 12 through "FSW" composite. An aluminum or rubber sound-absorbing nozzle 4 is then inserted. The embedded acoustic structure allows tire noise waves to be offset and canceled within the wheel hub, thereby significantly reducing tire noise. The sound-absorbing nozzle 4 is detachably installed in the sound-absorbing cavity 3. Different materials and inner diameters of the sound-absorbing nozzle 4 can be selected according to the driving environment of the vehicle, making it convenient to update and replace the sound-absorbing nozzle 4. The replacement of different sound-absorbing nozzles 4 is used to adjust the noise frequency range absorbed by the sound-absorbing cavity 3, thereby increasing the absorption efficiency of the sound-absorbing cavity 3 for tire noise waves.

[0034] This application also discloses a wheel hub noise reduction and sound absorption structure; please refer to the accompanying drawings. Figure 1As shown, a sound-absorbing cavity 5 is provided inside the rim of the wheel rim 11. The sound-absorbing cavity 5 absorbs tire noise and reduces tire noise waves during vehicle operation. The hollow rim structure eliminates casting defects through spinning forming, and the yield strength of 6061 aluminum plate (≥270MPa) is significantly higher than that of cast A356 (≥180MPa), which improves the strength of the rim of the wheel rim 11 and enhances the impact resistance of the wheel rim 11.

[0035] This application also discloses a wheel hub noise reduction and sound absorption structure; please refer to the accompanying drawings. Figure 1 As shown, a sound-absorbing groove 31 is provided in the sound-absorbing cavity 3 near the sound-absorbing nozzle hole 2. The sound-absorbing groove 31 provides a larger buffer space for the sound-absorbing cavity 3 to absorb tire noise waves, so that the sound-absorbing cavity 3 can absorb more tire noise waves and improve the noise reduction and sound absorption effect.

[0036] This application also discloses a wheel hub noise reduction and sound absorption structure; please refer to the accompanying drawings. Figure 2 As shown, the sound-absorbing nozzle 4 includes a sound-receiving tube 41 coaxially connected with the sound guide tube 42. The sound-receiving tube 41 actively absorbs tire noise waves, which are then guided into the sound-absorbing cavity 3 through the sound guide tube 42. The sound guide tube 42 is fixed with the sound-absorbing nozzle hole 2 by interference fit, which strengthens the stability of the sound-absorbing nozzle 4 and prevents the sound-absorbing nozzle 4 from falling off.

[0037] This application also discloses a wheel hub noise reduction and sound absorption structure; please refer to the accompanying drawings. Figure 4 As shown, the sound-absorbing nozzle 4 is made of rubber, and a snap ring 43 is fixedly connected to the outside of the sound guide tube 42. The snap ring 43 is tightly connected to the inner wall of the sound-absorbing cavity 3 to strengthen the fixation between the sound-absorbing nozzle 4 and the sound-absorbing cavity 3.

[0038] This application also discloses a wheel hub noise reduction and sound absorption structure; please refer to the accompanying drawings. Figure 5 As shown, the sound guide tube 42 has multiple sound-diffusing holes 44 on one side away from the sound receiving tube 41. Through the active dispersion and capture of tire noise waves by the sound-diffusing holes 44, the tire noise waves are dispersed and reduced during the process of being absorbed into the sound-absorbing cavity 3, which reduces the pressure on the tire noise waves in the sound-absorbing cavity 3 and prevents the tire noise waves from overflowing because the sound-absorbing cavity 3 cannot receive a large amount of tire noise waves in a short period of time.

[0039] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A wheel hub noise reduction and sound absorption structure, characterized in that, Including the sound-absorbing nozzle (4); The wheel hub (1) includes a rim (11) and spokes (12). At the junction of the rim (11) and spokes (12), a sound-absorbing nozzle hole (2) and a sound-absorbing cavity (3) are sequentially opened from the outside to the inside. The sound-absorbing nozzle (4) is detachably installed in the sound-absorbing nozzle hole (2). The sound-absorbing nozzle hole (2) and the sound-absorbing cavity (3) are connected.

2. The wheel hub noise reduction and sound absorption structure according to claim 1, characterized in that, The sound-absorbing nozzle (4) includes a sound-receiving tube (41) coaxially connected to the sound guide tube (42).

3. The wheel hub noise reduction and sound absorption structure according to claim 2, characterized in that, The sound guide tube (42) is fixed with the sound-absorbing nozzle hole (2) by an interference fit.

4. The wheel hub noise reduction and sound absorption structure according to claim 2, characterized in that, The sound guide tube (42) is fixedly connected to a snap ring (43), which is tightly connected to the inner wall of the sound-absorbing cavity (3).

5. The wheel hub noise reduction and sound absorption structure according to claim 1, characterized in that, The rim (11) has a sound-absorbing cavity (5) inside its flange.

6. The wheel hub noise reduction and sound absorption structure according to claim 1, characterized in that, The sound-absorbing nozzle (4) is made of aluminum or rubber.

7. The wheel hub noise reduction and sound absorption structure according to claim 1, characterized in that, A sound-absorbing groove (31) is provided in the sound-absorbing cavity (3) near the sound-absorbing nozzle hole (2).

8. The wheel hub noise reduction and sound absorption structure according to claim 1, characterized in that, Several of the sound-absorbing nozzles (4) are evenly arranged with the center of the rim (11) as the center of symmetry.

9. The wheel hub noise reduction and sound absorption structure according to claim 2, characterized in that, The sound guide tube (42) has multiple sound-diffusing holes (44) on the side away from the sound receiver tube (41).

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