Wheel hub counterweight noise reduction structure and preparation method thereof

Abstract

The invention relates to the technical field of bicycle parts, in particular to a wheel hub balance weight noise reduction structure and a preparation method thereof. The wheel hub balance weight noise reduction structure comprises a wheel hub body, connecting ribs and a center shaft sleeve used for being installed with a bicycle shaft; the plurality of connecting ribs are divided into a plurality of groups, reinforcing rib blocks are arranged between adjacent connecting ribs in each group of connecting ribs, and convection air holes for the connecting ribs to pass through are respectively formed in two sides of each reinforcing rib block; the cross section of each connecting rib is divided into a reinforcing part and a resistance reducing part, the multiple sets of connecting ribs are arranged, the reinforcing parts and the resistance reducing parts of the connecting ribs are rectangular and triangular respectively, the reinforcing rib blocks are arranged between every two adjacent connecting ribs, the two connecting ribs are supported through the reinforcing rib blocks, the connecting ribs are not prone to deformation, and the connecting ribs are not prone to deformation. Therefore, the original wheel spoke is replaced, the tensile strength of the wheel hub is improved, and the stability of the wheel hub is improved.

Description

Technical Field

[0001] The present application relates to the technical field of bicycle components, and in particular to a wheel hub weight noise reduction structure and a preparation method thereof. Background Art

[0002] China is a country with a large number of bicycles, so various inventions and creations about bicycles have emerged one after another. The bicycle industry is constantly improving various parts of bicycles. The bicycle wheel we see in daily life is called a hub. Basically, the hub includes a rim, a hub shell and spokes. The hub has a hub shell rotatably supported on the shaft through steel ball assemblies at both ends. Therefore, the shaft is fixed to the bicycle frame and the hub shell rotatably supported on the shaft, and the spokes are connected between the rim and the hub shell.

[0003] During the conversion of the original spoke wheels to one-piece wheels, the alloy die-cast one-piece wheels have an integrated structure, and the general connection form will form resonance at the spokes. Under specific usage conditions, oscillation noise with a peak value of about 580HZ will be generated. The noise waveform is a repeated sine waveform, which is uncomfortable to ride for a long time. Therefore, further improvements can be made. Summary of the invention

[0004] In order to improve the stability of a wheel hub and reduce noise, the present application provides a wheel hub counterweight noise reduction structure and a preparation method thereof.

[0005] In the first aspect, the present application provides a wheel hub counterweight noise reduction structure adopts the following technical solution: A wheel hub weight noise reduction structure comprises a wheel hub body, connecting ribs and a central sleeve for mounting with a bicycle shaft, wherein the central sleeve is arranged at the center of the wheel hub body, and the wheel hub body is connected to the central sleeve via the connecting ribs; The plurality of connecting ribs are divided into a plurality of groups, and reinforcing rib blocks are arranged between adjacent connecting ribs in each group of connecting ribs, and convection air holes for passing the connecting ribs are respectively opened on both sides of the reinforcing rib blocks, and the convection air holes are located between adjacent connecting ribs, and the ratio of the total area of ​​the convection air holes between adjacent connecting ribs to the overall area between adjacent connecting ribs is set to 0.4 or greater; The cross section of the connecting rib is divided into a reinforcement part and a resistance reduction part, the reinforcement part is rectangular, the resistance reduction part is triangular, one side of the reinforcement part is connected to the reinforcement rib block, and the side of the reinforcement part away from the reinforcement rib block is connected to the resistance reduction part.

[0006] By adopting the above technical scheme, a plurality of groups of connecting ribs are provided, and the reinforcement part and the drag reduction part of the connecting ribs are rectangular and triangular respectively, and a reinforcing rib block is provided between two adjacent connecting ribs, and the two connecting ribs are supported by the reinforcing rib block, so that the connecting ribs are not easily deformed, thereby replacing the original wheel spokes, improving the tensile strength of the wheel hub, thereby improving the stability of the wheel hub, and convection air holes are provided between adjacent connecting ribs and the reinforcing rib blocks, so that the airflow can also pass through the convection air holes during riding, and the connecting ribs are used to divide the airflow, thereby achieving a noise reduction effect, reducing the noise of the airflow passing through the wheel hub, and the audio amplitude tends to be flat after noise reduction, and the noise waveform is a parabolic waveform until it exceeds the audible range of the human ear.

[0007] Optionally, the thickness of the reinforcement portion is greater than the thickness of the resistance reducing portion.

[0008] By adopting the above technical solution, the reinforced part serves as the supporting end of the connecting ribs, providing stronger connection strength, making the connection between the hub body and the center sleeve more secure, being able to withstand greater loads and stresses, and reducing deformation of the hub body during riding, thereby improving the stability and controllability of the bicycle.

[0009] Optionally, the resistance reducing portion is chamfered at one end away from the reinforcement portion.

[0010] By adopting the above technical solution, one end of the drag reduction part is chamfered to better control the airflow passing through the wheel hub during riding. The triangular design and chamfering can guide the airflow to pass through the connecting ribs more smoothly, so that the drag reduction part reduces the formation of vortices around the connecting ribs, thereby reducing wind resistance and improving the aerodynamic efficiency of the bicycle.

[0011] Optionally, reinforcing ribs are provided between the connecting ribs and the hub body.

[0012] By adopting the above technical solution, the connection strength between the connecting ribs and the hub body is increased by using reinforcing ribs, thereby improving the connection stability between the connecting ribs and the hub body.

[0013] Optionally, the width of the connecting rib gradually narrows from the end connected to the center sleeve to the end connected to the hub body.

[0014] By adopting the above technical solution, the width of the connecting ribs is gradually narrowed. On the one hand, the use of materials can be reduced, thereby reducing the overall weight of the bicycle wheel hub and improving the acceleration performance and handling performance of the bicycle. On the other hand, the connecting ribs can distribute stress more reasonably, especially between the connecting ribs and the center sleeve. During the driving of the bicycle, the load generated by the rotation of the bicycle shaft is relatively large. Therefore, the width of the connecting ribs at the center sleeve is wider, thereby increasing the structural strength of the bicycle shaft placement.

[0015] Optionally, the hub body, connecting ribs and center sleeve are cast into a whole.

[0016] By adopting the above technical solution, the hub body, the connecting ribs and the center sleeve are cast into a whole, thereby reducing the possibility of parts loosening and falling off due to excessive and frequent use.

[0017] Optionally, the hub body, connecting ribs and center sleeve are all made of aluminum alloy.

[0018] By adopting the above technical solution and manufacturing the product with aluminum alloy, both strength and lightness can be guaranteed.

[0019] Optionally, the hub body is provided with a mounting seat for mounting a nighttime reflective panel of a bicycle.

[0020] By adopting the above technical solution and arranging a mounting seat, it is convenient to install a bicycle night reflector, thereby increasing the safety of night driving.

[0021] Optionally, the hub body is provided with a valve hole for accommodating a tire inflation hole.

[0022] By adopting the above technical solution, it is convenient to inflate the tire installed on the wheel hub during subsequent use.

[0023] In a second aspect, the present application provides a method for preparing a wheel hub, including the following specific methods: S1: The forging material is fed into a forging machine, heated by the forging machine, taken out and put into a roll forging machine, the roll forging machine makes a blank, and then the die forging press makes a prototype of the inner ring of the hub body; S2: Correct the inner ring prototype of the hub body and check the center axis, and inspect the size and surface defects of the inner ring prototype of the hub body; S3: heat-treating the inner ring prototype of the hub body, placing the treated inner ring prototype of the hub body on a processing line, and processing the hub body through the processing line; S4: The hub body, the connecting ribs, the center sleeve and the reinforcing rib block are combined and processed to obtain a bicycle hub.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. Multiple groups of connecting ribs are provided, and the reinforcement part and the drag reduction part of the connecting ribs are rectangular and triangular respectively, and a reinforcing rib block is provided between two adjacent connecting ribs, and the two connecting ribs are supported by the reinforcing rib block, so that the connecting ribs are not easy to deform, thereby replacing the original wheel spokes, improving the tensile strength of the wheel hub, and thus improving the stability of the wheel hub; 2. Convection holes are arranged between adjacent connecting ribs and reinforcing rib blocks, so that the airflow can also pass through the convection holes during riding, and the connecting ribs are used to divide the airflow, thereby achieving a noise reduction effect and reducing the noise of the airflow passing through the wheel hub; 3. The thickness of the reinforcement part is greater than that of the drag-reducing part, so that the reinforcement part, as the supporting end of the connecting rib, provides stronger connection strength, making the connection between the hub body and the center sleeve more secure, capable of withstanding greater loads and stresses, reducing the deformation of the hub body during riding, thereby improving the stability and controllability of the bicycle; 4. The width of the connecting ribs is gradually narrowed. On the one hand, it can reduce the use of materials, thereby reducing the overall weight of the bicycle wheel hub and improving the acceleration and handling performance of the bicycle. On the other hand, it can make the connecting ribs distribute stress more reasonably, especially between the connecting ribs and the center sleeve. During the driving of the bicycle, the load generated by the rotation of the bicycle shaft is relatively large. Therefore, the width of the connecting ribs at the center sleeve is wider, thereby increasing the structural strength of the bicycle shaft placement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front view schematic diagram of the overall structure in Example 1 of the present application.

[0026] Figure 2 It is a partial cross-sectional schematic diagram of the connecting ribs in Example 1 of the present application.

[0027] Figure 3 It is a side view schematic diagram of the overall structure in Example 1 of the present application.

[0028] Figure 4 It is a front view schematic diagram of the overall structure in Example 2 of the present application.

[0029] Description of reference numerals: 1. Hub body; 2. Connecting ribs; 21. Reinforcement part; 22. Drag reduction part; 3. Center sleeve; 4. Reinforcement rib block; 5. Convection air hole; 6. Reinforcement rib; 7. Mounting seat; 71. Through hole; 8. Valve hole. DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-3 This application is described in further detail.

[0031] An embodiment of the present application discloses a wheel hub counterweight noise reduction structure.

[0032] Embodiment 1: Reference Figure 1A wheel hub weight noise reduction structure comprises a wheel hub body 1, a connecting rib 2 and a center sleeve 3 for mounting with a bicycle axle, wherein the center sleeve 3 is arranged at the center of the wheel hub body 1, the wheel hub body 1 is connected to the center sleeve 3 through the connecting rib 2, one end of the connecting rib 2 is fixedly connected to the wheel hub body 1, and the other end is fixedly connected to the center sleeve 3; In this embodiment, there are ten connecting ribs 2 in total, and each two are arranged in a group, with a total of five groups. The two connecting ribs 2 in each group are spaced apart and arranged in parallel. A reinforcing rib block 4 is arranged in the middle between two adjacent connecting ribs 2 in each group. Correspondingly, convection air holes 5 are respectively opened at both ends of the reinforcing rib block 4 along the length direction of the connecting rib 2 and the two connecting ribs 2.

[0033] In actual use, multiple groups of connecting ribs 2 are provided, and reinforcing rib blocks 4 are provided between two adjacent connecting ribs 2. The reinforcing rib blocks 4 are used to support the two connecting ribs 2, so that the connecting ribs 2 are not easily deformed, thereby replacing the original wheel spokes, improving the tensile strength of the wheel hub, and thus improving the stability of the wheel hub, and convection holes 5 are provided between adjacent connecting ribs 2 and reinforcing rib blocks 4, so that the airflow can also pass through the convection holes 5 during riding, and the connecting ribs 2 are used to divide the airflow, thereby achieving a noise reduction effect, so that the noise of the airflow passing through the wheel hub is reduced, and the audio amplitude tends to be flat after noise reduction, and the noise waveform is a parabolic waveform until it exceeds the audible range of the human ear; After monitoring, the noise generated by the wheel hub braking was recorded during the noise reduction process. After noise reduction, the main frequency of the noise in the convection air hole part was around 580Hz, and the high-order harmonics were between 1160Hz and 1740Hz.

[0034] Reference Figure 1 Specifically, in the present embodiment, the ratio of the total area of ​​the convection holes 5 to the overall area between two adjacent connecting ribs 2 is set to 0.4 or greater. By limiting the area ratio, the area of ​​the convection holes 5 can change with the distance between two adjacent connecting ribs 2, thereby always maintaining the air flow of the convection holes 5.

[0035] Reference Figure 1 , 2 Specifically, in this embodiment, arc-shaped reinforcing ribs 6 are provided at the connection positions of each group of connecting ribs 2 and the hub body 1, and the reinforcing ribs 6 are located at the opposite positions of the two connecting ribs 2 in each group. The reinforcing ribs 6 are used to increase the connection strength between the connecting ribs 2 and the hub body 1, and improve the connection stability between the connecting ribs 2 and the hub body 1.

[0036] Reference Figure 1 , 2Specifically, in the present embodiment, the cross section of the connecting rib 2 is divided into a reinforcing portion 21 and a drag reducing portion 22. The reinforcing portion 21 is rectangular, and the drag reducing portion 22 is triangular. The thickness of the reinforcing portion 21 along the diameter direction of the hub body 1 is greater than the thickness of the drag reducing portion 22. One side of the reinforcing portion 21 is connected to the reinforcing rib 6, and the side of the reinforcing portion 21 away from the reinforcing rib 6 is connected to the drag reducing portion 22. The two inclined surfaces of the drag reducing portion 22 away from the reinforcing rib 6 are chamfered.

[0037] During actual use, on the one hand, the thickness of the reinforcement part 21 is greater than that of the drag reduction part 22, so that the reinforcement part 21 serves as the supporting end of the connecting rib 2, providing stronger connection strength, making the connection between the hub body 1 and the center sleeve 3 more secure and able to withstand greater loads and stresses, thereby reducing the deformation of the hub body 1 during riding. On the other hand, one end of the drag reduction part 22 is chamfered to better control the airflow passing through the wheel hub during riding. The triangular design and chamfering can guide the airflow to pass through the connecting rib 2 more smoothly, so that the drag reduction part 22 reduces the formation of vortices around the connecting rib 2, thereby reducing wind resistance and improving the aerodynamic efficiency of the bicycle.

[0038] Reference Figure 1 , 3 Specifically, in the present embodiment, the width of the connecting rib 2 along the height direction of the hub body 1 gradually narrows from the end connected to the center sleeve 3 to the end connected to the hub body 1. The width of the connecting rib 2 gradually narrows. On the one hand, the use of materials can be reduced, thereby reducing the overall weight of the bicycle hub and improving the acceleration performance and handling performance of the bicycle. On the other hand, the connecting rib 2 can distribute stress more reasonably, especially between the connecting rib 2 and the center sleeve 3. During the driving of the bicycle, the load generated by the rotation of the bicycle shaft is relatively large. Therefore, the width of the connecting rib 2 at the center sleeve 3 is wider, thereby increasing the structural strength of the bicycle shaft placement.

[0039] Reference Figure 1 Specifically, in this embodiment, the hub body 1, the connecting ribs 2 and the center sleeve 3 are all made of aluminum alloy and cast into a whole. Made of aluminum alloy, the strength and lightness can be guaranteed, and the hub body 1, the connecting ribs 2 and the center sleeve 3 are cast into a whole, which reduces the possibility of loosening and falling off of parts due to excessive and frequent use.

[0040] Reference Figure 1Specifically, in this embodiment, a mounting seat 7 is provided on the inner edge of the hub body 1, and there are two mounting plates. The two mounting seats 7 are spaced apart from each other on the hub body 1, and a through hole 71 is provided on the mounting seat 7. The distance between the through holes 71 of the two mounting plates is 129.4 mm. The mounting seat 7 is provided to facilitate the installation of a nighttime reflector for a bicycle, thereby increasing the safety of nighttime driving.

[0041] Reference Figure 1 Specifically, in this embodiment, a valve hole 8 is also provided on the inner edge of the hub body 1, so as to facilitate inflating the tire installed on the wheel hub during subsequent use.

[0042] The implementation principle of a wheel hub counterweight noise reduction structure in an embodiment of the present application is as follows: during riding, the two connecting ribs 2 are supported by the reinforcing rib blocks 4, so that the connecting ribs 2 are not easily deformed, thereby replacing the original wheel spokes, improving the tensile strength of the wheel hub, and thus improving the stability of the wheel hub, and convection holes 5 are arranged between adjacent connecting ribs 2 and the reinforcing rib blocks 4, so that the airflow can also pass through the convection holes 5 during riding, and the connecting ribs 2 are used to divide the airflow, thereby achieving a noise reduction effect, and reducing the noise of the airflow passing through the wheel hub.

[0043] Embodiment 2: Reference Figure 4 The difference between this embodiment and embodiment 1 is that the position of the reinforcement rib block 4 and the number of convection holes 5 are different. In this embodiment, the reinforcement rib block 4 is arranged at one end of each group of two adjacent connecting ribs 2 close to the center sleeve 3 and is fixedly connected to the center sleeve 3. There is one convection hole 5, which is arranged at one end of the reinforcement ribs in the two connecting ribs 2 away from the center sleeve 3. The ratio of the total area of ​​the convection holes 5 to the overall area between the two adjacent connecting ribs 2 is set to 0.5 or greater.

[0044] In actual use, the convection air holes 5 cooperate with the connecting ribs 2 to cut and reduce the noise of the airflow close to the wheel hub, thereby achieving a noise reduction effect and reducing the noise of the airflow passing through the wheel hub.

[0045] The embodiment of the present application also discloses a method for preparing a wheel hub.

[0046] A method for preparing a wheel hub, based on the above-mentioned wheel hub counterweight noise reduction structure, comprises the following steps: S1: feeding the forging material into a forging machine, heating the forging machine, taking out the forging material and putting it into a roll forging machine, the roll forging machine makes a blank, and then using a die forging press to form the inner ring prototype of the hub body 1; S2: Correct the inner ring prototype of the hub body 1 and check the center axis, and inspect the size and surface defects of the inner ring prototype of the hub body 1; S3: heat-treating the inner ring prototype of the hub body 1, placing the treated inner ring prototype of the hub body 1 on a processing line, and processing the hub body 1 on the processing line; S4: The hub body 1, the connecting ribs 2, the center sleeve 3 and the reinforcing rib block 4 are combined and processed to obtain a bicycle hub.

[0047] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wheel hub counterweight noise reduction structure, characterized in that: The wheel hub comprises a wheel hub body (1), connecting ribs (2) and a central sleeve (3) for mounting on a bicycle shaft, wherein the central sleeve (3) is arranged at the center of the wheel hub body (1), and the wheel hub body (1) is connected to the central sleeve (3) via the connecting ribs (2); The plurality of connecting ribs (2) are divided into a plurality of groups, and in each group of the connecting ribs (2), reinforcing rib blocks (4) are arranged between adjacent connecting ribs (2), and convection holes (5) for passing the connecting ribs (2) are respectively opened on both sides of the reinforcing rib blocks (4), and the convection holes (5) are located between adjacent connecting ribs (2), and the ratio of the total area of ​​the convection holes (5) between adjacent connecting ribs (2) to the overall area between adjacent connecting ribs (2) is set to 0.4 or greater; The cross section of the connecting rib (2) is divided into a reinforcing portion (21) and a resistance reducing portion (22); the reinforcing portion (21) is rectangular, and the resistance reducing portion (22) is triangular; one side of the reinforcing portion (21) is connected to the reinforcing rib (6) block, and the side of the reinforcing portion (21) away from the reinforcing rib (6) block is connected to the resistance reducing portion (22).

2. A wheel hub counterweight noise reduction structure according to claim 1, characterized in that: The thickness of the reinforcement portion (21) is greater than the thickness of the resistance reduction portion (22).

3. The wheel hub counterweight noise reduction structure according to claim 1, characterized in that: The resistance reducing portion (22) is chamfered at one end away from the reinforcing portion (21).

4. The wheel hub counterweight noise reduction structure according to claim 1, characterized in that: A reinforcing rib (6) is provided between the connecting rib (2) and the hub body (1).

5. The wheel hub counterweight noise reduction structure according to claim 1, characterized in that: The width of the connecting rib (2) gradually narrows from the end connected to the central shaft sleeve (3) to the end connected to the hub body (1).

6. The wheel hub counterweight noise reduction structure according to claim 1, characterized in that: The hub body (1), the connecting ribs (2) and the central sleeve (3) are cast into a whole.

7. The wheel hub counterweight noise reduction structure according to claim 1, characterized in that: The hub body (1), the connecting ribs (2) and the central shaft sleeve (3) are all made of aluminum alloy.

8. The wheel hub weight noise reduction structure according to claim 1, characterized in that: The hub body (1) is provided with a mounting seat (7) for mounting a nighttime reflective plate of a bicycle.

9. The wheel hub counterweight noise reduction structure according to claim 1, characterized in that: The wheel hub body (1) is provided with a valve hole (8) for accommodating a tire inflation hole.

10. A method for preparing a wheel hub, based on the wheel hub counterweight noise reduction structure according to any one of claims 1 to 9, characterized in that: The steps include: S1: feeding the forging material into a forging machine, heating the forging machine, taking out the forging material and putting it into a roll forging machine, the roll forging machine makes a blank, and then the die forging press machine makes the inner ring prototype of the hub body (1); S2: Correcting the inner ring prototype of the hub body (1) and inspecting the center axis, and checking the size and surface defects of the inner ring prototype of the hub body (1); S3: heat-treating the inner ring prototype of the hub body (1), placing the treated inner ring prototype of the hub body (1) on a processing line, and processing the hub body (1) on the processing line; S4: The hub body (1), the connecting ribs (2), the center sleeve (3) and the reinforcing rib block (4) are combined and processed to obtain a bicycle hub.

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