Low-noise automobile hub suitable for high-speed driving

Abstract

The low-noise automobile hub suitable for high-speed driving comprises a hub body, mounting holes are formed in the center of the interior of the hub body at equal intervals, spoke bodies are arranged in the positions, on the outer sides of the mounting holes, of the interior of the hub body at equal intervals, and spoke gaps are formed between the spoke bodies. A spoke inner groove is formed in the inner surface of the spoke body, a spoke outer groove is formed in the outer surface of the spoke body, a spoke surface is arranged on the surface of the spoke body, a flow guide groove is formed in the surface of the spoke surface, and a polyurethane micropore sound absorption layer is embedded in the inner wall of the flow guide groove. By optimizing the structure of the spoke body and arranging a reasonable air flow guide structure, wind noise and periodic vortex of air when a vehicle runs at a high speed are reduced, and therefore the effect of low noise is achieved.

Description

Technical Field

[0001] This utility model relates to the field of automotive wheel hub technology, specifically a low-noise automotive wheel hub suitable for high-speed driving. Background Technology

[0002] The wheel hub is an important component of the vehicle's driving system. Its main function is to support the tires and connect key parts such as the axle, brake drum, wheel disc, and half shaft. It is also known as a wheel rim, steel rim, wheel, or tire rim and is a basic component for vehicle driving, steering, driving, and braking.

[0003] Chinese patent CN210234548U discloses an automobile wheel hub, which includes, from the outside to the inside, a rim, spokes, and a mounting part connected in sequence; the mounting part has a shaft hole in the middle and a number of bolt connection holes evenly distributed around the shaft hole; the connection area between the mounting part and the spokes is a fan-shaped area with alternating concave and convex surfaces distributed circumferentially.

[0004] The aforementioned type of car wheel hub, while increasing the heat dissipation area of ​​the mounting part and improving the connection performance between the spokes and the mounting part through the fan-shaped connection area, has the effect of promoting heat dissipation and structural reliability. However, because the spokes of the wheel hub have a flat structure and lack a reasonable airflow guiding structure, the wind noise and periodic eddies generated by the air entering the wheel hub when the vehicle is driving at high speed will lead to greater driving noise, affecting people's driving experience. Therefore, we propose a low-noise car wheel hub suitable for high-speed driving. Utility Model Content

[0005] The purpose of this invention is to provide a low-noise automotive wheel hub suitable for high-speed driving, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a low-noise automotive wheel hub suitable for high-speed driving, comprising a wheel hub body, wherein equally spaced mounting holes are provided at the center of the interior of the wheel hub body, a first convex ring and a second convex ring are respectively provided on both sides of the surface of the wheel hub body, equally spaced spokes are provided inside the wheel hub body outside the mounting holes, and a spoke gap is provided between the spokes, an inner spoke groove is provided on the inner surface of the spokes, an outer spoke groove is provided on the outer surface of the spokes, a spoke surface is provided on the surface of the spokes, and a guide groove is provided on the surface of the spoke surface, wherein a polyurethane microporous sound-absorbing layer is embedded in the inner wall of the guide groove.

[0007] Preferably, the spokes are arc-shaped airfoil structures, and the spokes are distributed in an involute spiral pattern, allowing airflow to adhere and reduce air resistance.

[0008] Preferably, the groove depth of the outer groove of the spoke is 3-5mm, and the groove depth of the inner groove of the spoke is 6-8mm, forming a pressure gradient to accelerate the airflow discharge.

[0009] Preferably, the junctions of the inner spoke groove, outer spoke groove, guide groove, and spoke body are all provided with transition fillets to reduce airflow stripping noise.

[0010] Preferably, the guide groove is offset along the central axis of the wheel spoke surface to avoid the generation of periodic eddies.

[0011] Preferably, the spoke surface on one side of the guide channel is provided with equally spaced anti-turbulence micropores, which can disrupt the air turbulence boundary layer.

[0012] Preferably, the inner wall of the hub body is provided with a hub inner surface, and the surface of the hub inner surface is provided with a diamond-like carbon film, which can reduce the air friction coefficient and suppress aerodynamic noise.

[0013] Preferably, the outer wall of the hub body is provided with a hub outer surface, and the surface of the hub outer surface is provided with equally spaced reinforcing ribs, and the reinforcing ribs are inclined structures.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The spokes adopt an arc-shaped airfoil structure with an involute spiral distribution, creating a synergistic flow guiding effect with the hub's rotation direction. This promotes airflow adhesion and reduces air resistance. Secondly, inner and outer spoke grooves are respectively located on the inner and outer sides of the spokes. The inner spoke grooves are 6-8 mm deep, while the outer spoke grooves are 3-5 mm deep, creating a pressure gradient that accelerates airflow discharge. Furthermore, guide channels are provided on the spoke surface, with the guide channels between adjacent spokes staggered along the central axis of the outer spoke groove to prevent the generation of periodic vortices. The inner spoke grooves, outer spoke grooves, and guide channels are integrated with the spokes. All parts are equipped with rounded corners to reduce airflow stripping noise. Then, a 0.5mm polyurethane microporous sound-absorbing layer is embedded in the inner wall of the airflow channel, which can attenuate sound energy in the 2000-4000Hz frequency band. The anti-turbulence micropores arrayed on the surface of the wheel spokes can disrupt the air turbulence boundary layer. In addition, the diamond-like carbon film on the inner surface of the wheel hub can reduce the air friction coefficient and suppress aerodynamic noise. By optimizing the structure of the wheel spokes and setting a reasonable airflow guiding structure, the wind noise and periodic eddies of the air when the vehicle is driving at high speed are reduced, thereby achieving a low noise effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the spoke body of this utility model;

[0018] Figure 3 This is a partial enlarged cross-sectional view of the spoke body of this utility model.

[0019] Figure 4 This is a partially enlarged structural diagram of the hub body of this utility model;

[0020] Figure 5 This is a side view of the appearance structure of this utility model.

[0021] In the diagram: 1. Hub body; 2. Spoke body; 3. Spoke clearance; 4. Mounting hole; 5. Inner groove of the spoke; 6. Outer groove of the spoke; 7. Spoke surface; 8. Guide groove; 9. Anti-turbulence micropores; 10. Inner surface of the hub; 11. Polyurethane microporous sound-absorbing layer; 12. Diamond-like carbon film; 13. Outer surface of the hub; 14. Reinforcing bone; 15. First convex ring; 16. Second convex ring; 17. Transition fillet. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Therefore, the following detailed description of the embodiments of this utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. 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 scope of protection of the present utility model.

[0024] Please see Figure 1-5 An embodiment of this utility model provides a low-noise car wheel hub suitable for high-speed driving, including a wheel hub body 1. The center of the wheel hub body 1 is provided with equally spaced mounting holes 4. The two sides of the surface of the wheel hub body 1 are respectively provided with a first convex ring 15 and a second convex ring 16. The wheel hub body 1 outside the mounting holes 4 is provided with equally spaced spokes 2, and the spokes 2 are provided with spoke gaps 3. The inner surface of the spokes 2 is provided with spoke inner grooves 5, the outer surface of the spokes 2 is provided with spoke outer grooves 6, the surface of the spokes 2 is provided with spoke surfaces 7, and the surface of spoke surfaces 7 is provided with guide grooves 8. The inner wall of the guide grooves 8 is embedded with a polyurethane microporous sound-absorbing layer 11.

[0025] Specifically, the spoke 2 adopts an arc-shaped airfoil structure and is distributed in an involute spiral, which forms a synergistic guiding effect with the rotation direction of the hub, allowing the airflow to adhere and reduce air resistance. A guide groove 8 is provided on the surface of the spoke 7, and the guide grooves 8 between adjacent spokes 2 are staggered along the central axis of the outer groove 6 of the spoke to avoid the generation of periodic vortices.

[0026] By optimizing the structure of the wheel spokes 2 and setting a reasonable airflow guiding structure, the wind noise and periodic eddies of the air when the vehicle is driving at high speed are reduced, thereby achieving a low noise effect.

[0027] The spoke 2 is an airfoil structure with an involute spiral distribution;

[0028] The outer groove 6 of the spoke has a groove depth of 3-5mm, and the inner groove 5 of the spoke has a groove depth of 6-8mm; forming a pressure gradient to accelerate airflow discharge;

[0029] The inner spoke groove 5, outer spoke groove 6, and guide groove 8 are all provided with transition fillet 17 at the joints with the spoke body 2 to reduce airflow stripping noise;

[0030] The guide channel 8 is offset along the central axis of the spoke surface 7; the surface of the spoke surface 7 on one side of the guide channel 8 is provided with equally spaced anti-turbulence micropores 9; a 0.5mm polyurethane microporous sound-absorbing layer 11 is embedded in the inner wall of the guide channel 8, which can attenuate sound energy in the 2000-4000Hz frequency band; the anti-turbulence micropores 9 arrayed on the surface of the spoke surface 7 can destroy the air turbulence boundary layer.

[0031] The inner wall of the hub body 1 is provided with a hub inner surface 10, and the surface of the hub inner surface 10 is provided with a diamond-like carbon film 12; the diamond-like carbon film 12 on the surface of the hub inner surface 10 can reduce the air friction coefficient and suppress aerodynamic noise.

[0032] A hub outer wall 13 is provided on the outer side wall of the hub body 1, and the surface of the hub outer wall 13 is provided with equally spaced reinforcing ribs 14, and the reinforcing ribs 14 are inclined structures; the inclined reinforcing ribs 14 on the hub outer wall 13 can enhance the structural strength of the hub body 1.

[0033] In this embodiment, the spoke 2 is firstly designed with an arc-shaped airfoil structure and an involute spiral distribution, creating a synergistic flow guiding effect with the hub's rotation direction, resulting in airflow adhering to the spokes and reducing air resistance. Secondly, an inner spoke groove 5 and an outer spoke groove 6 are respectively provided on the inner and outer sides of the spoke 2. The depth of the inner spoke groove 5 is 6-8 mm, and the depth of the outer spoke groove 6 is 3-5 mm, forming a pressure gradient to accelerate airflow discharge. Furthermore, a flow guide groove 8 is provided on the surface of the spoke 7, and the flow guide grooves 8 between adjacent spokes 2 are staggered along the central axis of the outer spoke groove 6 to avoid the generation of periodic vortices. The joints of the inner spoke groove 5, the outer spoke groove 6, the flow guide groove 8, and the spoke 2 are all provided with transition fillets 17. To reduce airflow stripping noise, a 0.5mm polyurethane microporous sound-absorbing layer 11 is embedded in the inner wall of the guide groove 8, which can attenuate sound energy in the 2000-4000Hz frequency band. The anti-turbulence micropores 9 arrayed on the surface of the wheel spokes 7 can disrupt the air turbulence boundary layer. In addition, the diamond-like carbon film 12 on the inner surface 10 of the wheel hub can reduce the air friction coefficient and suppress aerodynamic noise. By optimizing the structure of the wheel spokes 2 and setting a reasonable airflow guiding structure, the wind noise and periodic eddies of the air when the vehicle is driving at high speed are reduced, thereby achieving a low noise effect. Furthermore, the inclined reinforcing bone 14 set on the outer surface 13 of the wheel hub can enhance the structural strength of the wheel hub body 1.

[0034] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

Claims

1. A low-noise automotive wheel hub suitable for high-speed driving, comprising a hub body (1), wherein equally spaced mounting holes (4) are provided at the center position inside the hub body (1), and a first convex ring (15) and a second convex ring (16) are respectively provided on both sides of the surface of the hub body (1), characterized in that, The hub body (1) outside the mounting hole (4) is provided with equally spaced spokes (2), and there is a spoke gap (3) between the spokes (2). The inner surface of the spokes (2) is provided with an inner spoke groove (5), the outer surface of the spokes (2) is provided with an outer spoke groove (6), the surface of the spokes (2) is provided with a spoke surface (7), and the surface of the spoke surface (7) is provided with a guide groove (8). The inner wall of the guide groove (8) is embedded with a polyurethane microporous sound-absorbing layer (11).

2. The low-noise automotive wheel hub suitable for high-speed driving according to claim 1, characterized in that: The spokes (2) are an airfoil structure, and the spokes (2) are distributed in an involute spiral pattern.

3. A low-noise automotive wheel hub suitable for high-speed driving according to claim 1, characterized in that: The groove depth of the outer spoke groove (6) is 3-5mm, and the groove depth of the inner spoke groove (5) is 6-8mm.

4. A low-noise automotive wheel hub suitable for high-speed driving according to claim 1, characterized in that: The inner spoke groove (5), outer spoke groove (6), guide groove (8) and spoke body (2) are all provided with transition fillet (17).

5. A low-noise automotive wheel hub suitable for high-speed driving according to claim 1, characterized in that: The guide groove (8) is offset along the central axis of the spoke surface (7).

6. A low-noise automotive wheel hub suitable for high-speed driving according to claim 1, characterized in that: The surface of the spoke (7) on one side of the guide groove (8) is provided with equally spaced anti-turbulence micropores (9).

7. A low-noise automotive wheel hub suitable for high-speed driving according to claim 1, characterized in that: The inner wall of the hub body (1) is provided with a hub inner surface (10), and the surface of the hub inner surface (10) is provided with a diamond-like carbon film (12).

8. A low-noise automotive wheel hub suitable for high-speed driving according to claim 1, characterized in that: The outer wall of the hub body (1) is provided with a hub outer surface (13), and the surface of the hub outer surface (13) is provided with equally spaced reinforcing ribs (14), and the reinforcing ribs (14) are inclined structures.

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