Brake disc, brake system and vehicle
By setting non-uniformly distributed radial ventilation holes on the brake disc, the problem of abnormal noise caused by resonance of the brake disc during braking is solved, achieving noise reduction and improved dynamic balance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-05-01
AI Technical Summary
Brake discs are prone to resonance during braking, which can cause abnormal noises.
The brake disc has at least two radially extending first ventilation holes, and these ventilation holes are non-uniformly distributed in the circumferential direction to avoid resonance caused by uniform frequency.
The non-uniformly distributed ventilation hole design avoids resonance caused by uniform frequency, reduces noise, improves the dynamic balance and service life of the brake disc, and enhances the driving experience.
Smart Images
Figure CN224187932U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle technology, and more particularly to a brake disc, a braking system, and a vehicle. Background Technology
[0002] The brake disc, or brake pad, is a key component of a car's braking system. Working in conjunction with the brake caliper, it utilizes friction braking. When the driver presses the brake pedal, the piston inside the brake caliper pushes the brake pads, causing them to press firmly against the surface of the brake disc. The friction generated between the brake pads and the brake disc converts the car's kinetic energy into heat energy, thereby reducing the wheel speed and achieving braking.
[0003] In related technologies, brake discs are prone to resonance during braking, which can lead to abnormal noises. Utility Model Content
[0004] This application provides a brake disc, a braking system, and a vehicle to at least partially solve the aforementioned technical problems.
[0005] To achieve the above objective, according to a first aspect of this application, a brake disc is provided, the brake disc having at least two first ventilation holes extending radially along the brake disc; the at least two first ventilation holes are non-uniformly distributed in the circumferential direction of the brake disc.
[0006] According to a second aspect of this application, a braking system is provided, including the aforementioned brake disc.
[0007] According to a third aspect of this application, a vehicle is provided, including the aforementioned brake disc or the aforementioned braking system.
[0008] In the brake disc of this application embodiment, since the brake disc has at least two first ventilation holes extending radially along the brake disc, and the at least two first ventilation holes are non-uniformly distributed in the circumferential direction of the brake disc, the frequency of the at least two first ventilation holes of the brake disc is inconsistent after the braking force passes through the brake disc, thus avoiding resonance after the frequency is consistent, thereby reducing noise.
[0009] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description
[0010] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0011] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.
[0012] Figure 1 This is a first-view structural schematic diagram of the brake disc provided in an exemplary embodiment of this application;
[0013] Figure 2 This is a schematic diagram of the brake disc from a second perspective in an exemplary embodiment of this application;
[0014] Figure 3 This is a third-view structural diagram of the brake disc provided in an exemplary embodiment of this application;
[0015] Figure 4 yes Figure 3 Cross-sectional view along the L1-L2 direction;
[0016] Figure 5 and Figure 6 Yes Figure 4 Further demonstration of the structure shown.
[0017] Explanation of reference numerals in the attached figures:
[0018] 100. Brake disc; 110. Disc cap; 130. Disc body; 135. Connecting rib; 132. First ventilation hole; 1321. First sub-hole; 1323. Second sub-hole; 1325. Third sub-hole; 134. Second ventilation hole; 1341. Pitch circle; 150. Fastener; 101. Zone. Detailed Implementation
[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.
[0020] The brake disc, or brake pad, is a key component of a car's braking system. Working in conjunction with the brake caliper, it utilizes friction braking. When the driver presses the brake pedal, the piston inside the caliper pushes the brake pads, causing them to press firmly against the surface of the brake disc. The friction generated between the brake pads and the brake disc converts the car's kinetic energy into heat energy, thereby reducing the wheel speed and achieving braking. This can be used to slow down or stop a moving car; maintain a stable speed for a car going downhill; and keep a parked car stationary on a slope.
[0021] In related technologies, brake discs are prone to resonance during braking, which can lead to abnormal noises.
[0022] According to the first aspect of this application, please refer to Figure 1 A brake disc 100 is provided. In some embodiments, the brake disc 100 has at least two first ventilation holes 132 extending radially along the brake disc 100; the at least two first ventilation holes 132 are non-uniformly distributed in the circumferential direction of the brake disc 100.
[0023] In the brake disc of this application embodiment, since the brake disc has at least two first ventilation holes extending radially along the brake disc; the at least two first ventilation holes are non-uniformly distributed in the circumferential direction of the brake disc, after the braking force passes through the brake disc, the frequencies of the at least two first ventilation holes of the brake disc are inconsistent, thus avoiding resonance after the frequencies are consistent, thereby reducing noise.
[0024] In some embodiments, the first ventilation hole 132 can be a straight radial ventilation hole. In some embodiments, the first ventilation hole 132 can be a curved radial ventilation hole, for example, the first ventilation hole 132 can be an "S"-shaped radial ventilation hole, with one end of the "S"-shaped radial ventilation hole close to the center of the brake disc 100 and the other end extending outward along the radial direction of the brake disc 100.
[0025] The number of first ventilation holes 132 can be two, three, four, or N.
[0026] In some embodiments, when there are two first ventilation holes 132, and they are straight radial ventilation holes, the extension directions of the two first ventilation holes 132 are not on the same straight line.
[0027] In some embodiments, the brake disc 100 includes a carbon ceramic brake disc, a cast iron brake disc, a steel brake disc, or a resin brake disc.
[0028] The material of the brake disc 100 can be selected according to actual needs, such as iron, carbon ceramic, aluminum ceramic, etc. The first ventilation hole 132 can be machined on the brake disc 100 through machining or casting processes.
[0029] In some implementation methods, please refer to Figure 5 Taking a radial ventilation hole with the first ventilation hole 132 as a straight line as an example, the angle between the first ventilation hole 132 and the adjacent first ventilation hole 132 in the clockwise direction is A1, and the angle between the first ventilation hole 132 and the adjacent first ventilation hole 132 in the counterclockwise direction is A2; the values of A1 and A2 are different.
[0030] When the first ventilation hole 132 is a curved radial ventilation hole, the linear regression trend line of the first ventilation hole 132 can be used. That is, the angle between the linear regression trend line of the first ventilation hole 132 in the clockwise direction and the linear regression trend line of the adjacent first ventilation hole 132 is A1, and the angle between the linear regression trend line of the first ventilation hole 132 in the counterclockwise direction and the linear regression trend line of the adjacent first ventilation hole 132 is A2; the values of A1 and A2 are different.
[0031] The values of A1 and A2 are different, resulting in inconsistent spacing between adjacent first ventilation holes 132. This leads to an uneven distribution of the multiple first ventilation holes 132. When braking force is applied to adjacent first ventilation holes, the vibration frequencies of these holes are inconsistent, preventing resonance that would occur if the vibration frequencies were the same. This effectively changes the modal frequency of the brake disc, avoiding order noise during braking and thus reducing noise.
[0032] The angle between a first ventilation hole 132 in the clockwise direction and the adjacent first ventilation hole 132 can refer to the angle between the axial direction of a first ventilation hole 132 in the clockwise direction and the axial direction of the adjacent first ventilation hole 132.
[0033] In some embodiments, there may be three or more first ventilation holes 132, wherein any three adjacent first ventilation holes are asymmetrically distributed relative to the middle first ventilation hole. Please refer to... Figure 5 , Figure 5 The plurality of first ventilation holes 132 may include a first sub-hole 1321, a second sub-hole 1323, and a third sub-hole 1325 arranged clockwise. M1 indicates the axial direction of the second sub-hole 1323, M2 indicates the axial direction of the first sub-hole 1321, and M3 indicates the axial direction of the third sub-hole 1325. It can be seen that the angle between M1 and M3 is A1, and the angle between M1 and M2 is A2. The values of A1 and A2 are different; A1 is significantly larger than A2.
[0034] In some embodiments, the first ventilation hole 132 may be a straight radial ventilation hole.
[0035] In some embodiments, the first ventilation hole 132 can be machined by machining or casting. The first ventilation hole 132 is machined on the brake disc 100. Machining may include turning, grinding, planing, milling, drilling, reaming, boring, etc. Casting may be a processing method in which solid metal is melted into a liquid state and poured into a mold of a specific shape, and then allowed to solidify.
[0036] In some embodiments, the cross-sectional area of the first ventilation hole 132 can be set as needed, and this application does not limit it.
[0037] In some embodiments, two adjacent first ventilation holes 132 may be arranged in an "X" shape, intersecting each other.
[0038] In some embodiments, this application does not limit the specific shape of the first ventilation hole 132, and the first ventilation hole 132 can be made by irregular casting. In some examples, the cross-section of the first ventilation hole 132 can be circular. In some examples, the cross-sectional shape of the first ventilation hole 132 can be a rectangle with rounded corners.
[0039] In some embodiments, the brake disc 100 includes a plurality of partitions 101, each partition 101 having a plurality of first ventilation holes 132.
[0040] By setting multiple zones on the brake disc 100, each zone having multiple first ventilation holes 132, the multiple first ventilation holes 132 in the brake disc 100 are designed in a zoned manner, which facilitates processing. Since the multiple first ventilation holes 132 in each zone are not evenly distributed, the first ventilation holes 132 are prevented from generating abnormal noise at a consistent frequency.
[0041] The number of first ventilation holes 132 in each zone can be adjusted according to actual needs, for example, it can be two, three, four or five, etc.
[0042] In some embodiments, the structures of multiple partitions can be identical, which is convenient for processing and has low cost.
[0043] In some examples, the first ventilation opening can be designed as five zones, with each zone containing multiple first ventilation openings. Within a zone, in a clockwise direction, any two adjacent first ventilation openings form an angle between their extension directions. These angles can be 9.5°, 9°, 10°, 11°, 13°, and 10.5°, respectively. This ensures that the order frequencies generated by the first ventilation openings within a zone are inconsistent, avoiding resonance caused by frequency coupling.
[0044] Please combine Figure 5 On a cross-section perpendicular to the axial direction of the brake disc 100, multiple sections of the brake disc 100 are indicated by dashed lines, and one of the sections 101 is labeled. It can be seen that... Figure 5 The illustrated brake disc 100 includes 5 sections, each section 101 is roughly fan-shaped, and the five sections are evenly distributed in the circumference of the brake disc 100. Each section is provided with multiple first ventilation holes 132.
[0045] In some embodiments, in one of the partitions 101, the angle between any two adjacent first ventilation holes 132 in the clockwise direction changes with a trend of first increasing and then decreasing or first decreasing and then increasing.
[0046] In these embodiments, in a section 101, along the clockwise direction, the angles of multiple included angles change in a trend of first increasing and then decreasing or first decreasing and then increasing, so that the multiple first ventilation holes 132 are unevenly distributed, thus avoiding the first ventilation holes 132 from generating abnormal noise at a consistent frequency.
[0047] The included angle between two adjacent first ventilation holes 132 can be the included angle between the axial directions of two adjacent first ventilation holes 132.
[0048] In some embodiments, in a partition 101, along the clockwise direction, the extension directions of any two adjacent first ventilation holes 132 have multiple included angles, and the angles of the multiple included angles change in a trend of first decreasing and then increasing.
[0049] In some embodiments, in a partition, multiple angles are formed between the extension directions of any two adjacent first ventilation holes in a clockwise direction, and the angles of the multiple angles change in a trend of first decreasing, then increasing and then decreasing again.
[0050] In some embodiments, on a cross-section perpendicular to the axial direction of the brake disc 100, the solid structure between the two first ventilation holes 132 is defined as a connecting rib 135. Multiple connecting ribs 135 exist on the cross-section perpendicular to the axial direction of the brake disc 100, and multiple first ventilation holes 132 are formed between the multiple connecting ribs 135. For example, a first ventilation hole 132 is provided between two connecting ribs 135.
[0051] A first ventilation hole 132 is provided between multiple connecting ribs 135. That is, in a cross-section perpendicular to the axial direction of the brake disc 100, the connecting ribs 135 of the first ventilation holes 132 in each section have different sizes. In some embodiments, in a cross-section perpendicular to the axial direction of the brake disc 100, along a clockwise direction, the width of the connecting rib 135 in a section can first increase, then decrease, then increase again, then decrease again. Further, the ratio of increase or decrease can be less than 40%, which can achieve better sound reduction, as well as better heat dissipation and friction reduction. It is easy to understand that in a cross-section perpendicular to the axial direction of the brake disc 100, when the width of the connecting rib 135 is larger, it means that the first ventilation holes 132 located on both sides of the connecting rib 135 have a larger included angle. In a cross-section perpendicular to the axial direction of the brake disc 100, when the width of the connecting rib 135 is small, it means that the first ventilation holes 132 located on both sides of the connecting rib 135 have a small included angle. This results in the connecting rib 135 exhibiting different sizes, leading to inconsistent spacing between adjacent first ventilation holes 132. In a cross-section perpendicular to the axial direction of the brake disc 100, the width of the connecting rib 135 changes in a clockwise direction. This allows the multiple first ventilation holes 132 to be frequency-shifted through the width of the connecting rib, ensuring that the order frequencies generated by the multiple first ventilation holes 132 within a sub-region are inconsistent. This avoids resonance caused by frequency coupling, thereby reducing noise.
[0052] In some implementations, multiple partitions 101 are centrally symmetrically distributed with the center of the brake disc 100 as the center.
[0053] This design facilitates machining and also improves the dynamic balance of the brake disc.
[0054] In some embodiments, in each of the partitions 101, the included angle between any two adjacent first ventilation holes 132 in the plurality of first ventilation holes 132 changes in the same trend in a clockwise direction.
[0055] This dynamic balancing process on the brake discs improves their balance. It helps maintain equilibrium during rotation, reducing vibration and wear, improving braking performance, extending component lifespan, enhancing the driving experience, ensuring even distribution and release of braking force, and minimizing energy loss and heat buildup.
[0056] Over prolonged use, brake discs are prone to imbalance due to braking force and external factors. This can lead to vibration and shaking during braking, affecting braking performance, driving stability and comfort, and also accelerating wear, thus shortening the lifespan of the brake discs and pads.
[0057] In some implementation methods, please refer to Figure 2 The diameter of the multiple first ventilation holes 132 is the same.
[0058] Each of the first ventilation holes 132 is the same size, and can be machined using a single tool, reducing costs.
[0059] In some implementation methods, please refer to Figure 1 The brake disc 100 has a plurality of second ventilation holes 134, which extend along the axial direction of the brake disc 100, and each second ventilation hole 134 is connected to a corresponding first ventilation hole 132.
[0060] In some embodiments, a second ventilation hole 134 may be machined on the disc body 130.
[0061] In some embodiments, the area of the second ventilation hole 134 in a cross-section perpendicular to the axial direction of the brake disc 100 can be adjusted as needed, and this application does not limit this.
[0062] In some embodiments, the second ventilation hole 134 extends through the brake disc 100 along the axial direction of the brake disc 100. This facilitates ventilation and heat dissipation along the axial direction of the brake disc 100.
[0063] In some embodiments, the number of second ventilation holes 134 is less than twice the number of first ventilation holes 132, resulting in better noise reduction.
[0064] In some embodiments, the diameters of the multiple second ventilation holes 134 are the same in a cross-section perpendicular to the axial direction of the brake disc 100.
[0065] The cross-section perpendicular to the axial direction of the brake disc 100 is circular, and the cross-sections of the multiple second ventilation holes 134 are also basically circular.
[0066] Each of the second ventilation holes 134 is the same size, and can be machined using a single tool, reducing costs.
[0067] In some embodiments, the brake disc 100 includes multiple partitions 101, each partition 101 having multiple second ventilation holes 134.
[0068] In some embodiments, multiple partitions can be provided on the brake disc 100, each partition having multiple second ventilation holes 134. That is, the second ventilation holes 134 in the brake disc 100 are designed in a partitioned manner, with each partition having multiple second ventilation holes 134. The second ventilation holes 134 communicate with the first ventilation holes.
[0069] In some implementations, multiple partitions 101 are centrally symmetrically distributed with the center of the brake disc 100 as the center.
[0070] This dynamic balancing process on the brake discs improves their balance. It helps maintain equilibrium during rotation, reducing vibration and wear, improving braking performance, extending component lifespan, enhancing the driving experience, ensuring even distribution and release of braking force, and minimizing energy loss and heat buildup.
[0071] In some embodiments, on a cross section perpendicular to the axial direction of the brake disc 100, the center of at least a portion of the second ventilation hole 134 in a section 101 is at a different distance from the center of the cross section of the brake disc 100.
[0072] On a cross-section perpendicular to the axial direction of the brake disc 100, the distances between the center of the multiple second ventilation holes 134 and the center of the brake disc cross-section are different. This arrangement can effectively change the modal frequency of the brake disc and avoid generating order noise during braking.
[0073] In some embodiments, on a cross section perpendicular to the axial direction of the brake disc 100, the distance between the center of the cross section of at least one second ventilation hole 134 and the center of the cross section of the brake disc is N1, and the distance between the center of the cross section of at least one second ventilation hole 134 and the center of the cross section of the brake disc is N2, where N1 is greater than N2.
[0074] In some embodiments, the center of the cross section of a plurality of second ventilation holes 134 may be at a distance N1 from the center of the cross section of the brake disc 100, and the line connecting the centers of the cross sections of the plurality of second ventilation holes 134 may form a first circle with the center of the cross section of the brake disc 100 as the center and N1 as the radius.
[0075] Multiple second ventilation holes 134 can have their cross-sectional centers all distanced from the cross-sectional center of the brake disc 100 by N2, where N1 is greater than N2. The lines connecting the cross-sectional centers of these multiple second ventilation holes 134 can form a second circle. This second circle has the cross-sectional center of the brake disc 100 as its center and L2 as its radius. It is easy to understand that the first circle and the second circle are concentric circles. In other words, the second ventilation holes 134 on the brake disc 100 are arranged using multiple concentric circles as pitch circles 1341. Please refer to... Figure 6 In some examples, the second ventilation holes 134 on the brake disc 100 are arranged in a seven-pitch circle configuration, with five second ventilation holes 134 passing through each pitch circle. The multiple second ventilation holes 134 on each pitch circle are centrally symmetrical. The seven pitch circles... Figure 6 It is indicated by a dashed line. It should be noted that the dashed line is only used to indicate that the second ventilation hole 134 is arranged in a seven-pitch circle manner.
[0076] The second ventilation holes 134 on the brake disc 100 are arranged using multiple concentric circles as pitch circles. In a cross-section perpendicular to the axial direction of the brake disc 100, the distance between two adjacent pitch circles is less than or equal to the cross-sectional diameter of the second ventilation hole 134. Furthermore, the difference in diameter between two adjacent pitch circles is less than or equal to the cross-sectional diameter of the second ventilation hole 134. For example, the diameter of each second ventilation hole 134 can be 5 mm. In some examples, the difference in diameter between two adjacent pitch circles can be the diameter of the second ventilation hole 134, thereby enabling the second ventilation holes 134 to wear more evenly on the circumference of the brake disc 100. This avoids large wear differences in the brake disc 100, thereby further reducing noise and increasing the service life of the brake disc 100.
[0077] In some implementation methods, please refer to Figure 3 , Figure 4 as well as Figure 5 On a cross section perpendicular to the axial direction of the brake disc 100, in a clockwise direction, in a partition 101, the center of the cross section of each second ventilation hole 134 has multiple distances from the center of the cross section of the brake disc 100, and the multiple distances of each partition 101 change in the same clockwise direction.
[0078] On a cross section perpendicular to the axial direction of the brake disc 100, in a clockwise direction, the center of the cross section of each first ventilation hole 132 in a partition 101 can be the center of the circle of each first ventilation hole 132 in a partition 101, and the center of the cross section of the brake disc 100 can be the center of the circle of the brake disc 100.
[0079] This ensures that the dynamic balancing process remains unaffected. This dynamic balancing treatment of the brake disc results in better dynamic balance. It allows the brake disc to remain balanced during rotation, reducing vibration and wear, improving braking performance, extending component life, enhancing the driving experience, ensuring even distribution and release of braking force, and reducing energy loss and heat buildup.
[0080] In some implementations, a first ventilation hole is connected to at most two second ventilation holes 134.
[0081] Thus, by unevenly distributing multiple first ventilation holes 132 and limiting the number of axial ventilation holes in each first ventilation hole, the noise reduction effect is better.
[0082] The number of axial ventilation holes in each first ventilation hole should not exceed two, which effectively reduces noise. For example, the number of second ventilation holes 134 on a first ventilation hole 132 can be zero, one, or two. This allows for better modification of the brake disc's modal frequency, avoiding the generation of order noise during braking.
[0083] In some embodiments, at least two of the first ventilation holes 132 are connected to different numbers of second ventilation holes 134.
[0084] Thus, the number of second ventilation holes 134 is inconsistent with that of first ventilation holes 132. When braking force is applied to adjacent first ventilation holes 132 and second ventilation holes 134, the frequencies of adjacent first ventilation holes 132 and second ventilation holes 134 are inconsistent, which effectively changes the modal frequency of the brake disc and avoids resonance after frequency coupling.
[0085] For example, please combine Figure 5 ,exist Figure 5 In one partition 101, there are eight first ventilation holes 132. The number of second ventilation holes 134 within each of the first ventilation holes in a clockwise direction can be 0, 1, 1, 1, 2, 1, 1. This ensures that the order frequencies generated by each second ventilation hole 134 are inconsistent, preventing resonance caused by frequency coupling. The second ventilation holes 134 can be mechanically machined into the locations of the first ventilation holes. The difference in the spacing angle between the multiple first ventilation holes creates a significant difference in the order frequencies generated by the multiple second ventilation holes 134, preventing resonance caused by frequency coupling and reducing noise.
[0086] Modal coupling refers to the phenomenon where energy transfer or mutual interference occurs between different vibration modes or natural frequencies and modes of different components in a braking system under specific conditions. This coupling can lead to dynamic instability in the system, resulting in problems such as brake squeal and vibration noise. When the natural frequencies of different parts of the brake disc are close, resonance may occur, leading to vibration noise. During driving, the brake disc is a rotating component. In related technologies, the brake disc is provided with uniformly distributed radial ventilation holes. During braking, the rotation of the brake disc generates order noise. In this application, multiple first ventilation holes 132 are non-uniformly distributed in the circumferential direction of the brake disc 100. After the braking force passes through multiple first ventilation holes 132, the vibration frequencies of the multiple first ventilation holes 132 are inconsistent, avoiding resonance caused by the frequencies becoming consistent, thereby reducing noise.
[0087] Please combine Figure 2 In some embodiments, the brake disc 100 includes a disc cap 110 and a disc body 130 connected together, at least a portion of the disc body 130 being located radially outside the disc cap 110, and the disc body 130 having a plurality of first ventilation holes.
[0088] The disc cap 110 is used to connect with the wheel hub of the vehicle, and the disc body 130 can rub against the friction pads to brake the vehicle.
[0089] In some embodiments, the brake disc 100 also includes a fastener 150, and the disc cap 110 and disc body 130 are connected by the fastener. This facilitates maintenance and replacement.
[0090] According to a second aspect of this disclosure, a braking system is provided, which includes the brake disc 100 described above. This braking system possesses all the beneficial effects of the brake disc 100 described above, which will not be elaborated further herein.
[0091] According to a third aspect of this disclosure, a vehicle is provided that includes the aforementioned brake disc 100 or the aforementioned braking system. This braking system possesses all the beneficial effects of the aforementioned brake disc 100 or the aforementioned braking system, which will not be elaborated further herein.
[0092] The vehicle may be a gasoline-powered vehicle, a plug-in hybrid electric vehicle, or a new energy vehicle, etc., and this disclosure does not make any specific restrictions.
[0093] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0094] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0095] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.
[0096] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any modifications, equivalent changes, or alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.
Claims
1. A brake disc, characterized in that The brake disc has at least two first ventilation holes extending radially along the brake disc; the at least two first ventilation holes are non-uniformly distributed in the circumferential direction of the brake disc; The brake disc includes multiple partitions, which are centrally symmetrically distributed with the center of the brake disc as the center.
2. The brake disc of claim 1, wherein The angle between the first ventilation hole in the clockwise direction and the extension direction of the adjacent first ventilation hole is A1, and the angle between the first ventilation hole in the counterclockwise direction and the extension direction of the adjacent first ventilation hole is A2; the values of A1 and A2 are different.
3. The brake disc of claim 1, wherein, The partition is provided with a plurality of the first ventilation holes.
4. The brake disc of claim 3, wherein, In one of the partitions, along the clockwise direction, the angle between any two adjacent first ventilation holes in the plurality of first ventilation holes changes with a trend of first increasing and then decreasing or first decreasing and then increasing.
5. The brake disc according to claim 3, characterized in that, Along the clockwise direction, in each of the partitions, the included angle between any two adjacent first ventilation holes in the plurality of first ventilation holes changes in the same trend.
6. The brake disc of claim 1, wherein, The diameter of the multiple first ventilation holes is the same.
7. The brake disc according to any one of claims 1 to 6, characterized in that, The brake disc has a plurality of second ventilation holes, which extend along the axial direction of the brake disc, and each second ventilation hole communicates with a corresponding first ventilation hole.
8. The brake disc according to claim 7, characterized in that, The second ventilation hole extends through the brake disc along its axial direction.
9. The brake disc of claim 7, wherein, The number of the second ventilation holes is less than twice the number of the first ventilation holes.
10. The brake disc of claim 7, wherein, In a cross-section perpendicular to the axial direction of the brake disc, the diameters of the multiple second ventilation holes are the same.
11. The brake disc according to claim 7, characterized in that, The brake disc includes multiple partitions, and each partition is provided with multiple second ventilation holes.
12. The brake disc according to claim 11, characterized in that, On a cross-section perpendicular to the axial direction of the brake disc, the distance between the center of the cross-section of at least a portion of the second ventilation holes in one of the partitions and the center of the cross-section of the brake disc is different.
13. The brake disc of claim 11, wherein, On a cross-section perpendicular to the axial direction of the brake disc, in a clockwise direction, the distance between the center of the cross-section of each of the second ventilation holes and the center of the cross-section of the brake disc varies in the same clockwise direction within one of the partitions.
14. The brake disc of claim 7, wherein, The first ventilation hole is connected to at most two second ventilation holes.
15. The brake disc of claim 7, wherein, In the plurality of first ventilation holes, at least two of the first ventilation holes are connected to different numbers of second ventilation holes.
16. The brake disc according to any one of claims 1 to 6, characterized in that The brake disc includes a carbon ceramic brake disc, a cast iron brake disc, a steel brake disc, or a resin brake disc.
17. The brake disc according to any one of claims 1 to 6, characterized in that, The brake disc includes a disc cap and a disc body connected together, at least a portion of the disc body is located radially outside the disc cap, and the disc body has a plurality of the first ventilation holes.
18. The brake disc of claim 17, wherein, The brake disc also includes fasteners, and the disc cap and the disc body are connected by the fasteners.
19. A braking system, characterized in that, Includes the brake disc as described in any one of claims 1 to 18.
20. A vehicle characterized by Includes the brake disc as described in any one of claims 1 to 18 or the braking system as described in claim 19.