Hub capable of reducing wind resistance

Abstract

The invention discloses a hub capable of reducing wind resistance, which comprises a hub part, a rim and a plurality of spokes connected with the hub part and the rim, a window is arranged between adjacent spokes, the window is strip-shaped, and the direction of the long axis of the window is the same as the radial direction of the hub; the spoke comprises a supporting part arranged on the front side of the spoke and a heat dissipation part arranged on the rear side of the spoke. The supporting part comprises a first supporting part, a second supporting part and a third supporting part connected with the first supporting part and the second supporting part, the first supporting part is fixed to the rim, and the second supporting part is fixed to the hub part; and the heat dissipation part is provided with wavy bulges. According to the hub, the window of the hub is arranged to be in the long-strip shape, meanwhile, the heat dissipation part is arranged at the spoke, the heat dissipation area is increased by arranging the wavy protrusions on the heat dissipation part, and the situation that the strength of the hub is affected due to long-term overheating of the hub is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel hubs, and more particularly to a wheel hub capable of reducing wind resistance. Background Art

[0002] As a key component of vehicles such as cars and motorcycles, wheels play a vital role in the safety, stability and driving efficiency of vehicles. With the rapid development of the automotive industry and the increasing requirements of consumers for vehicle performance, the design and manufacture of wheels are also facing many new challenges. First of all, the wheel not only has to withstand various forces and vibrations from the road during driving, but also must effectively deal with the large amount of heat generated by the brake system and tire friction. If this heat cannot be dissipated in time, it will cause the wheel to overheat, which will affect its performance and life. Therefore, the window design of the wheel is particularly important. The window is the open space formed between the spokes, and its reasonable design has a decisive influence on the heat dissipation performance of the wheel.

[0003] However, existing hub window designs often pursue aesthetics too much and ignore the balance between wind resistance and heat dissipation performance. The windows of some hubs are messy in shape and too many in number, which is not only not conducive to reducing the overall wind resistance, but may also affect the structural strength and heat dissipation effect of the hub. For example, the heat dissipation hub disclosed in Chinese invention patent CN215153621U, although the heat dissipation efficiency is improved by enlarging the window and using heat dissipation fins, the complexity of the window design may increase the wind resistance to a certain extent. In addition, the hub heat dissipation structure disclosed in Chinese invention patent application CN118539674A adopts liquid cooling to improve the heat dissipation efficiency. Although this method has a significant effect on heat dissipation performance, its complex structure not only increases the manufacturing cost, but also may cause safety hazards due to liquid leakage or component damage.

[0004] Therefore, how to optimize the window design to achieve lower wind resistance and higher heat dissipation efficiency while ensuring the beauty of the wheel hub has become an urgent problem to be solved in the current wheel hub design field. Summary of the invention

[0005] The main purpose of the present invention is to solve the problem that the hub window in the prior art is not conducive to reducing wind resistance in view of the above defects and shortcomings. The present invention sets the hub window in a long strip shape to minimize the wind resistance of the hub. At the same time, a heat dissipation part is set at the spoke, and the heat dissipation area is increased by setting a wave-shaped protrusion on the heat dissipation part. The heat generated by the tire during braking can be effectively dissipated by the heat dissipation part, preventing the hub from overheating for a long time and affecting the strength of the hub.

[0006] The technical solution of the present invention is as follows: A wheel hub for reducing wind resistance comprises a hub portion, a rim and a plurality of spokes connecting the hub portion and the rim, wherein a window is provided between adjacent spokes, the window is in the shape of an elongated strip, and the direction of the major axis of the window is the same as the radial direction of the hub; the spoke comprises a support portion arranged at the front side of the spoke and a heat dissipation portion arranged at the rear side of the spoke; the support portion comprises a first support portion, a second support portion and a third support portion connecting the first support portion and the second support portion, the first support portion is fixed at the rim, and the second support portion is fixed at the hub portion; the heat dissipation portion is provided with a wavy protrusion.

[0007] In the present invention, a window is provided between the adjacent spokes, and the window is in the shape of an elongated strip in the radial direction of the hub, so as to minimize the wind resistance of the window to the hub. At the same time, a heat dissipation portion is provided at the spoke, and a wave-shaped protrusion is provided on the heat dissipation portion to increase its heat dissipation area, so that the heat generated by the tire during braking can be effectively dissipated by the heat dissipation portion, thereby preventing the hub from overheating for a long time and affecting the strength of the hub. The long axis of the elongated window refers to the axis simulated in the length direction of the elongated window, and the short axis refers to the axis simulated in the width direction of the window. The front side of the spoke refers to the side that contacts the ground first in the forward direction of the tire, and the rear side of the spoke refers to the side that contacts the ground later in the forward direction of the tire. In the present invention, in an optional specific embodiment, the support portion and the heat dissipation portion are integrally formed.

[0008] Furthermore, the window is a quadrilateral, and the length of the longest side of the window is 1.5-4 times the length of the shortest side.

[0009] If the ratio of the length to width of the window is too large, the wind resistance will be small, but the airflow in the wheel hub cannot be exchanged smoothly with the outside atmosphere, and the temperature in the wheel hub will be too high in the long run; if the ratio of the length to width of the window is too small, it is good for heat dissipation, but the wind resistance of the internal structure of the tire is too large, and it is easily affected by turbulence, and the overall force of the tire is difficult to balance. It is more appropriate for the longest side of the window to be 1.5-4 times the shortest side.

[0010] Furthermore, a wave-shaped protrusion is provided on the front of the heat dissipation part; the thickness of the support part is higher than that of the heat dissipation part; and the thickness of the heat dissipation part gradually decreases outward along the side connected to the support part.

[0011] Providing the protrusion on the front side of the heat dissipation part is conducive to direct heat exchange between the protrusion and the atmosphere, and the heat dissipation effect is better. The thickness of the heat dissipation part is lower than that of the supporting part, which is more conducive to its heat dissipation of the tire. Because the heat dissipation part does not need to support the rim, it does not need to be made too thick just to reduce wind resistance. If the thickness of the heat dissipation part is suddenly reduced too much compared to the thickness of the supporting part, turbulence will be generated outside the heat dissipation part, which will also increase wind resistance. Therefore, the thickness of the heat dissipation part described in the present invention gradually decreases outward along the side connected to the supporting part, giving the supporting part and the heat dissipation part certain buffer areas of different thicknesses. The front side refers to the side facing away from the vehicle when the wheel hub is installed on the vehicle, and the back side refers to the side facing the vehicle.

[0012] Furthermore, the second support portion is tangent to the center of the wheel hub; the third support portion and the first support portion are connected in a V-shape, and the third support portion and the second support portion are connected in the same direction; and the protrusion is parallel to the third support portion.

[0013] The second support portion is tangent to the center of the hub, which can prevent the hub from being subjected to excessive stress. The third support portion is in the same direction as the second support portion. The third support portion and the first support portion are connected in a V-shape, which can increase the contact area between the first support portion and the rim, and avoid mechanical fatigue fracture caused by the spoke having too small a contact area with the rim due to the heat dissipation portion. Overall, the support portion composed of the first support portion, the second support portion, and the third support portion is roughly "L" shaped.

[0014] Furthermore, a first reinforcing portion is disposed on the front side of the supporting portion, and the first reinforcing portion wraps the front side of the supporting portion; and the thickness of the first reinforcing portion is lower than that of the supporting portion.

[0015] A first reinforcement portion is arranged on the front side of the support portion, which can disperse the stress of the support portion from the front side, especially the stress at the connection between the first support portion and the third support portion, thereby extending the service life of the wheel hub; at the same time, the thickness of the first reinforcement portion is lower than that of the support portion, which is conducive to lightweighting of the vehicle.

[0016] Optionally, a second reinforcement portion is provided on the rear side of the heat dissipation portion, and the second reinforcement portion wraps the rear side of the heat dissipation portion.

[0017] The rear side of the heat dissipation part is provided with a second reinforcement part, which can disperse the stress of the heat dissipation part from the rear side and increase the strength of the heat dissipation part. At the same time, the first reinforcement part and the second reinforcement part can bear the stress of the entire spoke on both sides of the spoke, making the wheel hub more durable and not easy to deform.

[0018] Optionally, the thickness of the heat dissipation portion gradually decreases along a direction perpendicular to the lateral protrusion where the heat dissipation portion is connected to the support portion.

[0019] By controlling the direction of the change in thickness of the heat dissipation part, the present invention is able to control the forward direction of the airflow on the surface of the wheel hub when the car is moving, ensuring that the airflow can fully contact along the direction of the wavy protrusion, so that the airflow and the heat dissipation part have enough time for heat exchange, and can also guide part of the airflow to smoothly enter the interior of the wheel hub to conduct heat from the inside.

[0020] In the present invention, a long strip window is provided between adjacent spokes, and the long axis direction of the window is the same as the radial direction of the hub. This design minimizes the wind resistance of the window to the hub, while allowing the airflow in the hub to exchange smoothly with the outside atmosphere; the spoke includes a support portion on the front side and a heat dissipation portion on the rear side, and the support portion is composed of a first support portion, a second support portion and a third support portion, forming a roughly "L"-shaped structure to ensure the strength and stability of the hub; a wavy protrusion is provided on the front side of the heat dissipation portion, and the thickness gradually decreases outward along the side connected to the support portion. This design is conducive to direct heat exchange between the protrusion and the atmosphere, improving the heat dissipation effect, while avoiding turbulence and reducing wind resistance; a first reinforcement portion is provided on the front side of the support portion, and the thickness is lower than the support portion, so as to disperse stress and extend the service life of the hub. A second reinforcement portion can be selectively provided on the rear side of the heat dissipation portion to increase the strength of the heat dissipation portion and make the hub more durable.

[0021] The technical effects of the present invention are as follows: 1. Reduce wind resistance: The long window design effectively reduces the wind resistance coefficient of the wheel hub, improving the fuel efficiency and driving stability of the vehicle; 2. Improve heat dissipation efficiency: The wave-shaped convexity and the gradually decreasing heat dissipation thickness design significantly increase the heat dissipation area, improve the heat dissipation efficiency, prevent the wheel hub from overheating, and extend the service life of the wheel hub; 3. Enhanced structural strength: The design of the "L"-shaped support structure and the front and rear reinforcement parts disperses the stress, enhances the overall strength and durability of the wheel hub, and reduces the risk of mechanical fatigue fracture; 4. Optimize airflow management: control the direction of the thickness change of the heat dissipation part to ensure that the airflow can fully contact along the direction of the wavy protrusion, increase the heat exchange time, and at the same time guide part of the airflow to smoothly enter the inside of the wheel hub to conduct heat from the inside.

[0022] The present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the present invention; Figure 2 It is a three-dimensional schematic diagram of the present invention. DETAILED DESCRIPTION

[0024] The present invention is further explained and illustrated by specific implementation modes below. It should be understood that the purpose of the following implementation modes is to make the technical solution of the present invention clearer and easier to understand, and does not limit the protection scope of the claims.

[0025] The present invention will be further described below by means of specific examples. Example 1

[0026] This embodiment provides a hub for reducing wind resistance, such as Figure 1 As shown, it includes a hub 1, a rim 2 and five spokes connecting the hub and the rim, a window 3 is provided between adjacent spokes, the window 3 is in a long strip shape, and the direction of the major axis 31 of the window 3 is the same as the radial direction of the hub; the spoke includes a support portion 42 arranged on the front side of the spoke and a heat dissipation portion 41 arranged on the rear side of the spoke; the support portion includes a first support portion 421, a second support portion 422 and a third support portion 423 connecting the first support portion 421 and the second support portion 422, the first support portion 421 is fixed to the rim 2, and the second support portion 422 is fixed to the hub 1; as shown Figure 2 As shown, the heat dissipation portion 41 is provided with a wave-shaped protrusion 411 .

[0027] Furthermore, the window 3 is a quadrilateral, and the length of the longest side of the window is 4 times the length of the shortest side.

[0028] Furthermore, a wave-shaped protrusion 411 is provided on the front of the heat dissipation portion 41 ; the thickness of the support portion 42 is higher than that of the heat dissipation portion 41 ; and the thickness of the heat dissipation portion 41 gradually decreases outward along the side connected to the support portion 42 .

[0029] Optionally, the second support portion 422 is tangent to the center of the hub; the third support portion 423 and the first support portion 421 are connected in a V-shape, and the third support portion 423 and the second support portion 422 are connected in the same direction; the axis of the protrusion 411 is parallel to the third support portion 423 .

[0030] Furthermore, a first reinforcing portion 51 is disposed on the front side of the supporting portion 42 , and the first reinforcing portion 51 wraps the front side of the supporting portion 42 ; the thickness of the first reinforcing portion 51 is lower than that of the supporting portion 42 .

[0031] Furthermore, a second reinforcement portion 52 is disposed on the rear side of the heat dissipation portion 41 , and the second reinforcement portion 52 wraps the rear side of the heat dissipation portion 41 .

[0032] Optionally, the thickness of the heat dissipation portion 41 gradually decreases along a direction perpendicular to the lateral protrusion connected to the support portion 42 .

[0033] Preferably, there are five windows and five spokes, and the spokes and windows are in the same plane; the five windows are evenly arranged in a radial pattern. Example 2

[0034] This embodiment is a wheel hub for reducing wind resistance, the length of the longest side of the window is 1.6 times the shortest side, and the other parameters are consistent with those of the first embodiment. Example 3

[0035] This embodiment is a wheel hub for reducing wind resistance, the length of the longest side of the window is 3.5 times the shortest side, and the other parameters are consistent with those of the first embodiment. Example 4

[0036] This embodiment is a wheel hub for reducing wind resistance, the length of the longest side of the window is twice the length of the shortest side, and the other parameters are consistent with those of the first embodiment. Example 5

[0037] This embodiment is a wheel hub for reducing wind resistance, the length of the longest side of the window is 2.5 times the shortest side, and the other parameters are consistent with those of the first embodiment.

[0038] Comparative Example This comparative example provides a wheel hub as in Chinese invention CN215153621U.

[0039] Performance Testing

[0040] The above wheel hub is made of aluminum alloy, the size of the wheel hub is 17'', and a Dongfeng Eagle YJ-01X tire is added to the wheel hub, and the speed is 60KM / h. The wind resistance coefficient, heat dissipation performance and structural strength test of the wheel hub of each embodiment and comparative example are carried out by the test method of the prior art, as follows: 1. Wind resistance coefficient test: The wheel hub is installed in a wind tunnel test equipment to simulate the driving state of the vehicle. The wind resistance coefficient (Cd) of the wheel hub with different window aspect ratio designs at different speeds is recorded. The wind resistance coefficients of each embodiment and comparative example are compared to evaluate the effect of the window aspect ratio on wind resistance. 2. Heat dissipation performance test: A thermal imager is used to monitor the temperature change of the wheel hub during high-speed driving and braking. The temperature data of each embodiment and comparative example at different time points are recorded. The effect of the wave-shaped protrusion and the heat dissipation part thickness design on the heat dissipation effect is analyzed. 3. Structural strength test: The stress distribution of the wheel hub under different loads is tested using a stress tester. The deformation and fracture of each embodiment and comparative example under the limit load are recorded. The effect of the reinforcement part design on the improvement of the wheel hub structural strength is evaluated. The test results are shown in Tables 1 to 5. Drag coefficient test results

[0041] Table 1 Thermal performance test results

[0042] 1. Initial temperature: The initial temperature of all wheels is 25°C before the test.

[0043] 2. Maximum temperature after braking and time to reach it

[0044] Table 2 Temperature stabilization time (from the start of braking until the temperature fluctuation range is within ±2°C)

[0045] Table 3

[0046] 3. Structural strength test result parameters

[0047] 1. Ultimate load (N)

[0048] Table 4

[0049] 2. Maximum deformation under extreme load (mm)

[0050] Table 5

[0051] The present invention is described by way of embodiments, but does not constitute a limitation to the present invention. With reference to the description of the present invention, other changes to the disclosed embodiments are easily conceivable to those skilled in the art, and such changes should fall within the scope defined by the claims of the present invention.

Claims

1. A wheel hub for reducing wind resistance, comprising a hub portion, a rim, and a plurality of spokes connecting the hub portion and the rim, characterized in that: A window is provided between adjacent spokes, and the window is in the shape of an elongated strip, and the direction of the long axis of the window is the same as the radial direction of the hub; the spoke comprises a support portion arranged on the front side of the spoke and a heat dissipation portion arranged on the rear side of the spoke; the support portion comprises a first support portion, a second support portion, and a third support portion connecting the first support portion and the second support portion, the first support portion is fixed to the rim, and the second support portion is fixed to the hub; the heat dissipation portion is provided with a wavy protrusion.

2. The wheel hub according to claim 1, characterized in that: The window is a quadrilateral, and the length of the longest side of the window is 1.5-4 times the length of the shortest side.

3. The wheel hub according to claim 1, characterized in that: The front of the heat dissipation part is provided with a wave-shaped protrusion; the thickness of the support part is higher than that of the heat dissipation part; and the thickness of the heat dissipation part gradually decreases outward along a side connected to the support part.

4. The wheel hub according to claim 3, characterized in that: The second support portion is tangent to the center of the wheel hub; the third support portion and the first support portion are connected in a V-shape, and the third support portion and the second support portion are connected in the same direction; and the protrusion is parallel to the third support portion.

5. The wheel hub according to claim 4, characterized in that: A first reinforcing portion is disposed on the front side of the supporting portion, and the first reinforcing portion wraps the front side of the supporting portion; the thickness of the first reinforcing portion is lower than that of the supporting portion.

6. The wheel hub according to claim 5, characterized in that: A second reinforcing portion is disposed on the rear side of the heat dissipation portion, and the second reinforcing portion wraps the rear side of the heat dissipation portion.

7. The wheel hub according to claim 3, characterized in that: The thickness of the heat dissipation portion gradually decreases along a direction perpendicular to the lateral protrusion connected to the support portion.

8. The wheel hub according to claim 5, characterized in that: There are five windows and five spokes, and the spokes and windows are in the same plane; the five windows are evenly arranged in a radial shape.

9. The wheel hub according to claim 8, characterized in that: The length of the longest side of the window is 4 times the length of the shortest side.

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