Brake disc and vehicle

Abstract

The brake disc comprises a disc body, the disc body is provided with a through hole, and the disc body comprises an inner circumferential face and an outer circumferential face. The inner peripheral surface is a hole wall surface of the through hole. The outer circumferential surface and the inner circumferential surface are arranged oppositely. The disc body is provided with a ventilation set which comprises a first air channel and a second air channel. The first air channel comprises a first opening and a second opening, the first opening is formed in the outer circumferential face, and the second opening is formed in the inner circumferential face. The second air channel comprises a third opening and a fourth opening, the third opening is formed in the peripheral face, and the third opening and the first opening are arranged at intervals in the circumferential direction of the disc body. The fourth opening communicates with the first air channel. The first air duct and / or the second air duct are / is bent. The brake disc is better in heat dissipation effect, longer in service life and better in brake performance.

Description

Technical Field

[0001] The present application relates to the automotive field, and in particular to a brake disc and a vehicle. Background Art

[0002] In the automotive field, the brake disc rubs against the caliper to achieve braking. During the braking process, the temperature of the brake disc rises, resulting in a decrease in braking performance. Currently, the brake discs on the market are equipped with a structure that helps dissipate heat, but the heat dissipation effect is not good. Utility Model Content

[0003] The purpose of the present application is to provide a brake disc and a vehicle, wherein the brake disc has better heat dissipation effect, longer service life and better braking performance.

[0004] In a first aspect, the present application provides a brake disc, comprising a disc body, the disc body being provided with a through hole, the disc body comprising an inner peripheral surface and an outer peripheral surface. The inner peripheral surface is the hole wall surface of the through hole. The outer peripheral surface is arranged opposite to the inner peripheral surface. The disc body is provided with a ventilation group, the ventilation group comprising a first air duct and a second air duct. The first air duct comprises a first opening and a second opening, the first opening being arranged on the outer peripheral surface, and the second opening being arranged on the inner peripheral surface. The second air duct comprises a third opening and a fourth opening, the third opening being arranged on the outer peripheral surface, and the third opening and the first opening being arranged at intervals along the circumference of the disc body. The fourth opening is connected to the first air duct. The first air duct and / or the second air duct are arranged in a curved manner.

[0005] The brake disc provided in the embodiment of the present application is configured by bending the first air duct and / or the second air duct. On the one hand, after the wind enters the ventilation group, the wind will collide with the inner wall surface of the air duct at the position where the air duct is bent, and the wind disturbance in the disc body is enhanced, and it is more difficult for the wind to flow out of the ventilation group, so that the wind stays in the ventilation group for a longer time, and the wind can contact the inner wall surface of the air duct for a longer time, so that the brake disc cools down faster, and then the brake disc has better heat dissipation effect, longer life, and better braking performance. On the other hand, the air duct is configured to be bent, and the air duct covers a wider range of the brake disc, so that the heat dissipation area of ​​the brake disc is wider.

[0006] At the same time, one end of the second air duct is connected to the first air duct, and when the wind from the first air duct and the wind from the second air duct flow to the connection point of the first air duct and the second air duct and converge together, the two will collide. The wind will experience turbulence and backflow, and it will be more difficult for the wind to flow out from the second opening. The wind will stay longer in the first air duct and the second air duct, so that the wind can contact the inner wall surface of the air duct for a longer time, making the brake disc cool down faster, thereby achieving better heat dissipation effect, longer service life, and better braking performance.

[0007] In some embodiments, there are multiple ventilation groups, and the multiple ventilation groups are arranged at intervals along the circumference of the disc body. By providing multiple ventilation groups, each position of the brake disc can be evenly cooled to avoid local high temperature of the brake disc.

[0008] In some embodiments, the first air duct is curved, and the first air duct has at least three curvatures. The more curvatures there are, the more curved positions there are in the first air duct. After the wind enters the first air duct, it is more difficult for it to flow out from the second opening, so that the wind can contact the inner wall surface of the brake disc for a longer time, the brake disc cools down faster, and the heat dissipation effect of the brake disc is better and the service life is longer.

[0009] In some embodiments, the standard value of the curvature of the first air duct is u, and u needs to meet the following conditions: 0.0003 mm -1 ≤u≤0.0345mm -1 The greater the curvature, the more curved the air duct is, the more difficult it is for the wind to flow out of the air duct, and the longer the time the wind is in contact with the inner wall of the air duct, the faster the brake disc cools down, and the better the heat dissipation effect of the brake disc is, and the longer its life is.

[0010] In some embodiments, the size of the first air duct along the axial direction of the disc is H1, and the size of the first air duct along the circumferential direction of the disc is D1, and H1 and D1 need to meet the following conditions: H1≤D1≤2.5H1. While meeting the heat dissipation requirements, the brake disc also has a high structural strength.

[0011] In some embodiments, the second air duct is curved, and the second air duct has at least three curvatures. The more curvatures there are, the more curved positions there are in the second air duct. After the wind enters the second air duct, it is more difficult to flow out from the fourth opening, so that the wind can contact the inner wall surface of the second air duct for a longer time, the brake disc cools down faster, and the brake disc has a better heat dissipation effect and a longer life.

[0012] In some embodiments, the standard value of the curvature of the second air duct is v, and v needs to meet the following conditions: 0.0029 mm -1 ≤v≤0.0336mm -1 The greater the curvature, the more curved the air duct is, the more difficult it is for the wind to flow out of the air duct, and the longer the time the wind is in contact with the inner wall of the air duct, the faster the brake disc cools down, and the better the heat dissipation effect of the brake disc is, and the longer its life is.

[0013] In some embodiments, the second air duct has a first angle a with the radial direction of the disc body, and a needs to meet the following conditions: 4°≤a≤15°. The size of the first angle a is within this range, which can ensure that the brake disc has a good heat dissipation effect and a high structural strength.

[0014] In some embodiments, the second air duct has a second angle b with the first air duct, and b needs to meet the following condition: 25°≤b≤65°. The size of the second angle b is within this range, ensuring that the brake disc can dissipate heat evenly.

[0015] In some embodiments, the size of the second air duct along the axial direction of the disc body is H2, and the size of the second air duct along the circumferential direction of the disc body is D2, and H2 and D2 need to meet the following condition: H2≤D2≤2.5H2. This is beneficial to improving the structural strength of the brake disc.

[0016] In some embodiments, the disc body includes an outer disc and an inner disc, and the outer disc is connected to the inner disc along the radial direction of the disc body. The first air duct includes a first section and a second section, and the first section and the second section are connected. The first section is located at the outer disc, and the second section is located at the inner disc. The ratio of the volume of the first section to the volume of the outer disc is greater than the ratio of the volume of the second section to the volume of the inner disc. In actual use of the brake disc, the temperature of the outer disc is higher than the position temperature of the inner disc, and the heat dissipation demand of the outer disc is greater. By setting the ratio of the volume of the first section to the volume of the outer disc to be greater than the ratio of the volume of the second section to the volume of the inner disc, the heat dissipation speed of the outer disc is made faster to meet the greater heat dissipation demand of the outer disc.

[0017] In some embodiments, in the outer disk per unit volume, the diameter of the first section is M1, and in the inner disk per unit volume, the diameter of the second section is N1, M1>N1. In the outer disk per unit volume, the length of the first section is L1, and in the inner disk per unit volume, the length of the second section is X1, L1≥X1.

[0018] In some embodiments, the second air duct includes a third section and a fourth section, the third section is located on the outer disk, and the fourth section is located on the inner disk. The ratio of the volume of the third section to the volume of the outer disk is greater than the ratio of the volume of the fourth section to the volume of the inner disk. By setting the ratio of the volume of the third section to the volume of the outer disk to be greater than the ratio of the volume of the fourth section to the volume of the inner disk, the heat dissipation speed of the outer disk is faster.

[0019] In some embodiments, in the outer disk per unit volume, the diameter of the third section is M2, and in the inner disk per unit volume, the diameter of the fourth section is N2, M2>N2. In the outer disk per unit volume, the length of the third section is L2, and in the inner disk per unit volume, the length of the fourth section is X2, L2≥X2.

[0020] In some embodiments, the disc body further includes a first end face and a second end face, and the first end face and the second end face are opposite to each other along the axial direction of the disc body. The ventilation group further includes a first ventilation hole, and at least one of the first end face and the second end face is provided with the first ventilation hole. The first ventilation hole is connected to the first air duct. And / or, the ventilation group further includes a second ventilation hole, and at least one of the first end face and the second end face is provided with the second ventilation hole. The second ventilation hole is connected to the second air duct. By providing the first ventilation hole and / or the second ventilation hole, the ventilation effect of the brake disc is improved.

[0021] In some embodiments, in each ventilation group, a line connecting the center of the third opening and the center of the fourth opening is a first connecting line. An angle between two adjacent first connecting lines is less than 90 degrees, so as to prevent the distance between two adjacent ventilation groups from being too far and causing local high temperature.

[0022] In some embodiments, the brake disc further includes an annular mounting portion, the annular mounting portion is at least partially located in the through hole, and the outer circumference of the annular mounting portion is fixedly connected to the inner circumference of the disc body, and the second opening is at least partially misaligned with the annular mounting portion. By providing the annular mounting portion, it is convenient to install the brake disc on the vehicle.

[0023] In some embodiments, a boss is provided on one side of the annular mounting portion along the axial direction of the disc body. By providing the boss, the boss can disperse the stress of the disc body and the annular mounting portion to enhance the pressure resistance of the brake disc, prevent cracks from occurring in the brake disc, and reduce mechanical losses. In addition, the boss can disperse heat and help dissipate heat.

[0024] A second aspect of the present application provides a vehicle, comprising the brake disc provided in the first aspect of the present application.

[0025] The brake disc provided in the embodiment of the present application is configured by bending the first air duct and / or the second air duct. On the one hand, after the wind enters the ventilation group, the wind will collide with the inner wall surface of the air duct at the position where the air duct is bent, and the wind disturbance in the disc body is enhanced, and it is more difficult for the wind to flow out of the ventilation group, so that the wind stays in the ventilation group for a longer time, and the wind can contact the inner wall surface of the air duct for a longer time, so that the brake disc cools down faster, and then the brake disc has better heat dissipation effect, longer life, and better braking performance. On the other hand, the air duct is configured to be bent, and the air duct covers a wider range of the brake disc, so that the heat dissipation area of ​​the brake disc is wider.

[0026] At the same time, one end of the second air duct is connected to the first air duct, and when the wind from the first air duct and the wind from the second air duct flow to the connection point of the first air duct and the second air duct and converge together, the two will collide. The wind will experience turbulence and backflow, and it will be more difficult for the wind to flow out from the second opening. The wind will stay longer in the first air duct and the second air duct, so that the wind can contact the inner wall surface of the air duct for a longer time, making the brake disc cool down faster, thereby achieving better heat dissipation effect, longer service life, and better braking performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the implementation scheme are briefly introduced below.

[0028] Figure 1 It is a schematic diagram of the structure of the brake disc provided in an embodiment of the present application.

[0029] Figure 2 yes Figure 1 A cross-sectional view of the brake disc shown in .

[0030] Figure 3 yes Figure 1 A cross-sectional view of the brake disc shown in .

[0031] Description of reference numerals: 1000-brake disc, 100-disc body, 101-first end face, 102-second end face, 103-through hole, 104-inner peripheral surface, 105-outer peripheral surface, 106-ventilation group, 107-first air duct, 108-second air duct, 109-first opening, 110-second opening, 111-third opening, 112-fourth opening, 113-first sub-air duct, 114-second sub-air duct, 115-second sub-air duct, 116-second sub-air duct, 117-second sub-air duct, 118-second sub-air duct, 119-second sub-air duct, 120-second sub-air duct, 121-second sub-air duct, 122-second sub-air duct, 123-first sub-air duct, 124-second sub-air duct, 125-second sub-air duct, 126-second sub-air duct, 127-second sub-air duct, 128-second sub-air duct, 129-second sub-air duct, 130-second sub-air duct, 131-second sub-air duct, 132-second sub-air duct, 133-first sub-air duct, 134-second sub-air duct, 135-second sub-air duct, 136-second sub-air duct, 137-second sub-air duct, 138-second sub-air duct, 139-second sub-air duct, 140-second sub-air duct, 141-second sub-air duct, 142-second sub-air duct, 143-first sub-air duct, 14 5-third sub-air duct, 116-fourth sub-air duct, 118-fifth sub-air duct, 119-sixth sub-air duct, 120-seventh sub-air duct, 121-first connecting line, 122-second connecting line, 123-outer disk, 124-inner disk, 125-first section, 126-second section, 127-third section, 128-fourth section, 129-first ventilation hole, 200-annular mounting portion, 201-bolt hole, 202-boss. DETAILED DESCRIPTION

[0032] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Figure 1 As shown, for the convenience of description, the radial direction of the brake disc 1000 is defined as the X-axis, and the axial direction of the brake disc 1000 is defined as the Y-axis.

[0033] Please refer to Figure 1 and Figure 2 The brake disc 1000 provided in the embodiment of the present application includes a disc body 100, which is in a circular ring shape. The disc body 100 includes a first end face 101 and a second end face 102, and along the Y-axis direction, the first end face 101 and the second end face 102 are arranged opposite to each other. The disc body 100 is provided with a through hole 103, and the through hole 103 penetrates the first end face 101 and the second end face 102. The disc body 100 also includes an inner peripheral surface 104 and an outer peripheral surface 105. The inner peripheral surface 104 is the hole wall surface of the through hole 103. Along the X-axis direction, the outer peripheral surface 105 is arranged opposite to the inner peripheral surface 104.

[0034] The disk body 100 is provided with a ventilation group 106, which includes a first air duct 107 and a second air duct 108, and the first air duct 107 and the second air duct 108 are both located between the first end surface 101 and the second end surface 102. The length direction of the first air duct 107 extends in the direction from the outer peripheral surface 105 to the inner peripheral surface 104, and the first air duct 107 includes a first opening 109 and a second opening 110, which are respectively located at two ends of the first air duct 107 along the length direction, and the first opening 109 is arranged on the outer peripheral surface 105, and the second opening 110 is arranged on the inner peripheral surface 104.

[0035] The length direction of the second air duct 108 extends in the direction from the outer circumferential surface 105 to the inner circumferential surface 104, and the second air duct 108 includes a third opening 111 and a fourth opening 112, and the third opening 111 and the fourth opening 112 are respectively located at two ends of the second air duct 108 along the length direction. The third opening 111 is provided on the outer circumferential surface 105, and the third opening 111 and the first opening 109 are arranged at intervals along the circumference of the disk body 100. The fourth opening 112 is connected to the first air duct 107, so that the second air duct 108 is connected to the first air duct 107. Among them, the first air duct 107 and / or the second air duct 108 are arranged in a curved manner.

[0036] Wind enters the first air duct 107 and the second air duct 108 from the first opening 109 and the third opening 111 respectively, and flows out from the second opening 110. When the wind flows through the first air duct 107 and the second air duct 108, it contacts the inner wall surface of the air duct, so that the temperature of the brake disc 1000 is reduced.

[0037] The brake disc 1000 provided in this embodiment is configured by bending the first air duct 107 and / or the second air duct 108. On the one hand, after the wind enters the ventilation group 106, the wind will collide with the inner wall surface of the air duct at the position where the air duct is bent, and the wind disturbance in the disc body is enhanced, and it is more difficult for the wind to flow out of the ventilation group 106, so that the wind stays in the ventilation group 106 for a longer time, and the wind can contact the inner wall surface of the air duct for a longer time, so that the brake disc 1000 cools down faster, and then the brake disc 1000 has a better heat dissipation effect, a longer service life, and better braking performance. On the other hand, the air duct is configured to be bent, and the air duct covers a wider range of the brake disc 1000, so that the heat dissipation area of ​​the brake disc 1000 is wider.

[0038] At the same time, one end of the second air duct 108 is connected to the first air duct 107. When the wind from the first air duct 107 and the wind from the second air duct 108 flow to the connection point of the first air duct 107 and the second air duct 108 and converge together, the two will collide. The wind will experience turbulence and backflow, and it will be more difficult for the wind to flow out from the second opening 110. The wind will stay longer in the first air duct 107 and the second air duct 108, so that the wind can contact the inner wall surface of the air duct for a longer time, so that the brake disc 1000 will cool down faster, and the brake disc 1000 will have a better heat dissipation effect and a longer life.

[0039] In some embodiments, please refer to Figure 2 The number of ventilation groups 106 is multiple, and the multiple ventilation groups 106 are arranged at intervals along the circumference of the disc body 100. By providing multiple ventilation groups 106, the multiple ventilation groups 106 cover the entire brake disc 1000, so that each position of the brake disc 1000 can be evenly cooled, avoiding local high temperature of the brake disc 1000.

[0040] In some embodiments, please refer to Figure 2 The first air duct 107 is bent, and the first air duct 107 has at least three curvatures. In this embodiment, the number of curvatures of the first air duct 107 is 4, and the first air duct 107 is composed of 4 sub-air ducts with different curvatures, and the 4 sub-air ducts with different curvatures include a first sub-air duct 113, a second sub-air duct 114, a third sub-air duct 115, and a fourth sub-air duct 116. Figure 2 The dotted line in the figure is the dividing line of the first sub-duct 113, the second sub-duct 114, the third sub-duct 115 and the fourth sub-duct 116. The first sub-duct 113, the second sub-duct 114, the third sub-duct 115 and the fourth sub-duct 116 are connected in sequence. The first sub-duct 113, the second sub-duct 114, the third sub-duct 115 and the fourth sub-duct 116 are bent in different directions respectively, and the bending angles are different.

[0041] In other embodiments, the number of curvatures of the first air duct 107 may be 3, 5, 6, 7, or 8. The greater the number of curvatures, the more curved positions of the first air duct 107. After the wind enters the first air duct 107, it is more difficult for the wind to flow out of the first air duct 107 from the second opening 110, so that the wind can contact the inner wall surface of the brake disc 1000 for a longer time, and the brake disc 1000 cools down faster, thereby achieving better heat dissipation effect and longer service life of the brake disc 1000.

[0042] In some embodiments, the standard value of the curvature of the first air duct 107 is u, and u needs to meet the following conditions: 0.0003 mm -1 ≤u≤0.0345mm -1 . Among them, u can be 0.0003mm -1、0.0004mm -1 、0.0005mm -1 、0.0006mm -1 、0.0007mm -1 、0.0008mm -1 、0.0009mm -1 、0.001mm -1 、0.002mm -1 、0.003mm -1 , 0.004mm -1 、0.034mm -1 、0.0341mm -1 、0.0342mm -1 、0.0343mm -1 、0.0344mm -1 、0.0345mm -1 The curvature of the first sub-air duct 113, the curvature of the second sub-air duct 114, the curvature of the third sub-air duct 115 and the curvature of the fourth sub-air duct 116 are all within this range. The greater the curvature, the more curved the air duct, the more difficult it is for the wind to flow out of the air duct, and the longer the time the wind is in contact with the inner wall of the air duct, so that the brake disc 1000 cools down faster, and the brake disc 1000 has a better heat dissipation effect and a longer life.

[0043] In some embodiments, please refer to Figure 1 , along the axial direction (Y-axis direction) of the disk body 100, the size of each first air duct 107 is H1, and along the circumferential direction of the disk body 100, the size of each first air duct 107 is D1, and H1 and D1 need to meet the following conditions: H1≤D1≤2.5H1. Specifically, D1 can be equal to H1, 1.1H1, 1.2H1, 1.3H1, 1.4H1, 1.5H1, 1.6H1, 1.7H1, 1.8H1, 1.9H1, 2H1, 2.1H1, 2.2H1, 2.3H1, 2.4H1, 2.5H1, etc.

[0044] When the brake disc 1000 is used for vehicle braking, the caliper squeezes the first end face 101 and the second end face 102, and rubs against the first end face 101 and the second end face 102 to reduce the vehicle speed. Therefore, during the braking process, the brake disc 1000 will be subjected to greater pressure on both sides along the Y-axis direction. In this embodiment, by setting the dimension H1 of the first air duct 107 along the Y-axis direction to be less than or equal to the dimension D1 of the first air duct 107 along the circumferential direction, and H1 and D1 satisfy the following relationship: H1≤D1≤2.5H1, the brake disc 1000 has a better heat dissipation effect, and the brake disc 1000 also has a thicker physical structure in the Y-axis direction, so that the structural strength of the brake disc 1000 is higher, and the brake disc 1000 has better pressure resistance.

[0045] In some embodiments, please refer to Figure 2 The second air duct 108 is bent and has at least three curvatures. In this embodiment, the second air duct 108 has three curvatures, and the second air duct 108 is composed of three sub-air ducts with different curvatures. The three sub-air ducts with different curvatures include a fifth sub-air duct 118, a sixth sub-air duct 119, and a seventh sub-air duct 120. Figure 2 The dotted line in is the boundary line of the fifth sub-duct 118, the sixth sub-duct 119 and the seventh sub-duct 120. The fifth sub-duct 118, the sixth sub-duct 119 and the seventh sub-duct 120 are connected in sequence, and the fifth sub-duct 118, the sixth sub-duct 119 and the seventh sub-duct 120 are bent in different directions, and the bending angles are different.

[0046] In other embodiments, the number of curvatures of the second air duct 108 may be 4, 5, 6, 7, 8, etc. The greater the number of curvatures, the more curved positions of the second air duct 108. After the wind enters the second air duct 108, it is more difficult to flow out of the second air duct 108 from the fourth opening 112, so that the wind can contact the inner wall surface of the second air duct 108 for a longer time, and the brake disc 1000 cools down faster, thereby achieving better heat dissipation effect and longer service life of the brake disc 1000.

[0047] In addition, the first air duct 107 and the second air duct 108 are both bent, so that the wind stays in the ventilation group 106 for a longer time, and the wind can contact the inner wall surface of the second air duct 108 for a longer time, so that the brake disc 1000 cools down faster, and thus the brake disc 1000 has a better heat dissipation effect and a longer life. In addition, the first air duct 107 and the second air duct 108 cover a wider range, and the wind can contact more positions of the brake disc 1000, so that the heat dissipation area of ​​the brake disc 1000 is larger.

[0048] In some embodiments, the standard value of the curvature of the second air duct 108 is v, and v needs to meet the following conditions: 0.0029 mm -1 ≤v≤0.0336mm -1 Among them, v can be 0.0029mm -1 、0.003mm -1 , 0.004mm -1 、0.005mm -1 、0.006mm -1 、0.007mm -1 、0.008mm -1 、0.009mm -1 , 0.01mm -1 , 0.02mm -1 , 0.03mm-1 、0.031mm -1 、0.032mm -1 、0.033mm -1 、0.0331mm -1 、0.0332mm -1 、0.0333mm -1 、0.0334mm -1 、0.0335mm -1 、0.0336mm -1 And so on. The curvatures of the fifth sub-air duct 118, the sixth sub-air duct 119, and the seventh sub-air duct 120 are all within this range. The greater the curvature, the more curved the air duct, the more difficult it is for the wind to flow out of the air duct, and the longer the time the wind is in contact with the inner wall of the air duct, so that the brake disc 1000 cools down faster, and the brake disc 1000 has a better heat dissipation effect and a longer life.

[0049] In some embodiments, please refer to Figure 2 Each second air duct 108 has a first angle a with the radial direction of the disk body 100, and a needs to meet the following condition: 4°≤a≤15°. Specifically, the line connecting the center of the third opening 111 and the center of the fourth opening 112 is the first connecting line 121, and the angle between the first connecting line 121 and the radial direction of the disk body 100 is the first angle a. The value of a can be 4°, 5°, 6°, 7°, 8°, 9°, 10°, 11°, 12°, 13°, 14°, 15°, etc.

[0050] If the center of the third opening 111 and the center of the fourth opening 112 are arranged in the radial direction of the disc body 100, the distance between the third opening 111 and the fourth opening 112 is the shortest. In this embodiment, the first connecting line 121 deviates from the radial direction of the disc body 100, so that the distance between the third opening 111 and the fourth opening 112 is farther, that is, the length of the second air duct 108 is longer, and the second air duct 108 can cover a wider area of ​​the brake disc 1000, thereby increasing the heat dissipation area of ​​the brake disc 1000, and further allowing the brake disc 1000 to dissipate heat more evenly.

[0051] The larger the first angle a is, the longer the length of the second air duct 108 is, the larger the heat dissipation area of ​​the brake disc 1000 is, but the structural strength of the brake disc 1000 is reduced. The smaller the first angle a is, the shorter the length of the second air duct 108 is, the smaller the heat dissipation area is, and the stronger the structural strength of the brake disc 1000 is. In this embodiment, the size of the first angle a is within this range, which can ensure that the brake disc 1000 has a good heat dissipation effect and a high structural strength.

[0052] In some embodiments, please refer to Figure 2In each ventilation group 106, the second air duct 108 and the first air duct 107 have a second angle b, and b needs to meet the following conditions: 25°≤b≤65°. Specifically, the line connecting the center of the first opening 109 and the center of the second opening 110 is the second connecting line 122. Among them, in the same ventilation group 106, the angle between the second connecting line 122 and the first connecting line 121 is the second angle b. The size of b can be 25°, 26°, 27°, 28°, 30°, 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°, 61°, 62°, 63°, 64°, 65° and so on.

[0053] The smaller the second angle b is, the closer the distance between the first air duct 107 and the second air duct 108 is, and the better the heat dissipation effect of the area near the ventilation group 106 on the brake disc 1000 is. However, if the second angle b is set too small, the distance between the two adjacent ventilation groups 106 will be too far, the heat dissipation of the brake disc 1000 will be uneven, and local high temperature will appear between the two adjacent ventilation groups 106. The larger the second angle b is set, the distance between the first air duct 107 and the second air duct 108 will be too far, and local high temperature will appear between the first air duct 107 and the second air duct 108. In this embodiment, the size of the second angle b is within this range, which ensures that the brake disc 1000 can dissipate heat evenly.

[0054] In some embodiments, please refer to Figure 1 , along the axial direction (Y-axis direction) of the disk body 100, the size of each second air duct 108 is H2, and along the circumferential direction of the disk body 100, the size of each second air duct 108 is D2, and H2 and D2 need to meet the following conditions: H2≤D2≤2.5H2. Specifically, D2 can be equal to H2, 1.1H2, 1.2H2, 1.3H2, 1.4H2, 1.5H2, 1.6H2, 1.7H2, 1.8H2, 1.9H2, 2H2, 2.1H2, 2.2H2, 2.3H2, 2.4H2, 2.5H2, etc. In this embodiment, by setting the dimension H2 of the second air duct 108 along the Y-axis direction to be less than or equal to its circumferential dimension D2, and H2 and D2 satisfy the following relationship: H2≤D2≤2.5H2, the brake disc 1000 has more solid structures in the Y-axis direction while meeting the heat dissipation requirements, the structural strength of the brake disc 1000 is higher, and the pressure resistance of the brake disc 1000 is better.

[0055] In some embodiments, please refer to Figure 3 The disk body 100 includes an outer disk 123 and an inner disk 124. Figure 3 The dotted circular line in the figure is the boundary between the outer disk 123 and the inner disk 124. Along the radial direction (X-axis direction) of the disk body 100, the outer disk 123 is connected to the inner disk 124, and the outer disk 123 and the inner disk 124 are integrally formed. The first air duct 107 includes a first section 125 and a second section 126. Figure 3 The dotted circular line in is also the boundary between the first section 125 and the second section 126. The first section 125 and the second section 126 are connected, the first section 125 is located in the outer disk 123, and the second section 126 is located in the inner disk 124. The ratio of the volume of the first section 125 to the volume of the outer disk 123 is greater than the ratio of the volume of the second section 126 to the volume of the inner disk 124.

[0056] During the vehicle braking process, the caliper and the outer disc 123 rub against each other on both sides along the Y-axis direction to reduce the vehicle speed. Therefore, compared with the inner disc 124, the temperature of the outer disc 123 is higher, and the heat dissipation requirement of the outer disc 123 is greater. In this embodiment, the ratio of the volume of the first section 125 to the volume of the outer disc 123 is greater than the ratio of the volume of the second section 126 to the volume of the inner disc 124. It can be understood that in the unit volume of the outer disc 123, the volume of the first section 125 is E. In the unit volume of the inner disc 124, the volume of the second section 126 is F, and E is greater than F (the unit of the volume of the outer disc 123 and the unit of the volume of the inner disc 124 are the same). Then, in the unit volume of the outer disc 123 and the unit volume of the inner disc 124, the space occupied by the first section 125 in the outer disc 123 is greater than the space occupied by the second section 126 in the inner disc 124. After the wind enters the first air duct 107, the air volume of the first section 125 is greater than the air volume of the second section. That is, the air volume in the outer disk 123 is greater than the air volume in the inner disk 124 , so that the cooling speed of the outer disk 123 is greater than the cooling speed of the inner disk 124 , thereby meeting the greater heat dissipation demand of the outer disk 123 .

[0057] In some embodiments, please refer to Figure 3 In the unit volume of the outer disk 123, the diameter of the first section 125 is M1, and in the unit volume of the inner disk 124, the diameter of the second section 126 is N1, M1>N1. In the unit volume of the outer disk 123, the length of the first section 125 is L1, and in the unit volume of the inner disk 124, the length of the second section 126 is X1, L1≥X1 (the unit of the volume of the outer disk 123 and the unit of the volume of the inner disk 124 are the same).

[0058] Specifically, the caliber of any position of the first section 125 is greater than the caliber of any position of the second section 126. When the first section 125 is cut along the circumference of the brake disc 1000 at any position, the cross-sectional area of ​​the first section 125 is S1. When the second section 126 is cut along the circumference of the brake disc 1000 at any position, the cross-sectional area of ​​the second section 126 is S2, and S1 is greater than S2.

[0059] In this embodiment, in the unit volume of the outer disk 123 and the unit volume of the inner disk 124, by setting the length of the first section 125 to be greater than or equal to the length of the second section 126, and the diameter of the first section 125 to be greater than the diameter of the second section 126, the space occupied by the first section 125 in the unit volume of the outer disk 123 is greater than the space occupied by the second section in the unit volume of the inner disk 124, and thus the heat dissipation speed of the outer disk 123 is greater than the heat dissipation speed of the inner disk 124. It can be understood that this design can make the ratio of the volume of the first section 125 to the volume of the outer disk 123 greater than the ratio of the volume of the second section 126 to the volume of the inner disk 124.

[0060] In other embodiments, within the single volume outer disk 123 and the unit volume inner disk 124 (the unit of the volume of the outer disk 123 and the unit of the volume of the inner disk 124 are the same), the length of the first section 125 is greater than the length of the second section 126, and the diameter of the first section 125 is equal to the diameter of the second section 126. This can also make the ratio of the volume of the first section 125 to the volume of the outer disk 123 greater than the ratio of the volume of the second section 126 to the volume of the inner disk 124.

[0061] In some embodiments, please refer to Figure 3 , the second air duct 108 includes a third section 127 and a fourth section 128, the third section 127 is located in the outer disk 123, and the fourth section 128 is located in the inner disk 124. The ratio of the volume of the third section 127 to the volume of the outer disk 123 is greater than the ratio of the volume of the fourth section 128 to the volume of the inner disk 124. It can be understood that in the unit volume of the outer disk 123, the volume of the third section 127 is J. In the unit volume of the inner disk 124, the volume of the fourth section 128 is K, and J is greater than K (the unit of the volume of the outer disk 123 and the unit of the volume of the inner disk 124 are the same). Then, in the unit volume of the outer disk 123 and the unit volume of the inner disk 124, the space occupied by the third section 127 in the outer disk 123 is greater than the space occupied by the fourth section 128 in the inner disk 124. After the wind enters the second air duct, the air volume of the third section 127 is greater than the air volume of the fourth section 128. That is, the air volume in the outer disk 123 is greater than the air volume in the inner disk 124, so that the outer disk 123 is cooled faster, thereby meeting the greater heat dissipation demand of the outer disk 123.

[0062] In some embodiments, please refer to Figure 3 , in the unit volume of the outer disk 123, the diameter of the third section 127 is M2, and in the unit volume of the inner disk 124, the diameter of the fourth section 128 is N2, M2>N2. In the unit volume of the outer disk 123, the length of the third section 127 is L2, and in the unit volume of the inner disk 124, the length of the fourth section 128 is X2, L2≥X2 (the unit of the volume of the outer disk 123 and the unit of the volume of the inner disk 124 are the same).

[0063] Specifically, the caliber of any position of the third section 127 is greater than the caliber of any position of the fourth section 128. When the third section 127 is cut along the circumference of the brake disc 1000 at any position, the cross-sectional area of ​​the third section 127 is S3. When the fourth section 128 is cut along the circumference of the brake disc 1000 at any position, the cross-sectional area of ​​the fourth section 128 is S4, and S3 is greater than S4.

[0064] In this embodiment, in the outer disk 123 of a single volume and the inner disk 124 of a unit volume, by setting the length of the third section 127 to be greater than or equal to the length of the fourth section 128, and the diameter of the third section 127 to be greater than the diameter of the fourth section 128, the space of the outer disk 123 of a unit volume occupied by the third section 127 is greater than the space of the inner disk 124 of a single volume occupied by the fourth section 128, and thus the heat dissipation speed of the outer disk 123 is greater than the heat dissipation speed of the inner disk 124. It can be understood that this setting can make the ratio of the volume of the third section 127 to the volume of the outer disk 123 greater than the ratio of the volume of the fourth section 128 to the volume of the inner disk 124.

[0065] In other embodiments, within the single volume outer disk 123 and the unit volume inner disk 124 (the unit of the volume of the outer disk 123 and the unit of the volume of the inner disk 124 are the same), the length of the third section 127 is greater than the length of the fourth section 128, and the diameter of the third section 127 is equal to the diameter of the fourth section 128. This also allows the ratio of the volume of the third section 127 to the volume of the outer disk 123 to be greater than the ratio of the volume of the fourth section 128 to the volume of the inner disk 124.

[0066] In some embodiments, please refer to Figure 1 and Figure 2 The ventilation group 106 further includes a first ventilation hole 129, and at least one of the first end surface 101 and the second end surface 102 is provided with the first ventilation hole 129. The first ventilation hole 129 is connected to the first air duct 107. Specifically, in this embodiment, there are multiple first ventilation holes 129, some of which penetrate the first end surface 101 and the inner wall surface of the first air duct 107 away from the first end surface 101, so as to connect the first air duct 107 with the side of the disk body 100 facing the first end surface 101. Other first ventilation holes 129 penetrate the second end surface 102 and the inner wall surface of the first air duct 107 away from the second end surface 102, so as to connect the first air duct 107 with the side of the disk body facing the second end surface 102.

[0067] And / or, the ventilation group 106 further includes a second ventilation hole (not shown), and at least one of the first end surface 101 and the second end surface 102 is provided with the second ventilation hole. The second ventilation hole is connected to the second air duct 108. Specifically, there are multiple second ventilation holes, some of which penetrate the first end surface 101 and the inner wall surface of the second air duct 108 away from the first end surface 101, so as to connect the second air duct 108 with the side of the disk body 100 facing the first end surface 101. Other second ventilation holes penetrate the second end surface 102 and the inner wall surface of the second air duct 108 away from the second end surface 102, so as to connect the second air duct 108 with the side of the disk body 100 facing the second end surface 102.

[0068] In this embodiment, if only the first ventilation hole 129 or the second ventilation hole is provided, the brake disc 1000 has good ventilation effect and high structural strength. If both the first ventilation hole 129 and the second ventilation hole are provided, the brake disc 1000 has better ventilation effect, but relatively poor structural strength.

[0069] In some embodiments, please refer to Figure 2 In each ventilation group 106, the line connecting the center of the third opening 111 and the center of the fourth opening 112 is the first connecting line 121. In two adjacent ventilation groups 106, the angle between the two first connecting lines 121 is c, and c is less than 90 degrees. By setting the angle c of the two first connecting lines 121 to be less than 90 degrees, that is, setting the angle between the two adjacent ventilation groups 106 to be less than 90 degrees, the distance between the two adjacent ventilation groups 106 is prevented from being too far, and local high temperature between the two adjacent ventilation groups 106 is avoided.

[0070] In some embodiments, please refer to Figure 1 and Figure 2 The brake disc 1000 further includes an annular mounting portion 200, the annular mounting portion 200 is at least partially located in the through hole 103, and the outer circumferential surface of the annular mounting portion 200 is fixedly connected to the inner circumferential surface 104 of the disc body 100, and the second opening 110 is at least partially misaligned with the annular mounting portion 200. The annular mounting portion 200 can be integrally formed with the disc body 100, or can be fixed to the disc body 100 by welding. In this embodiment, by providing the annular mounting portion 200, it is convenient to install the brake disc 1000 on the rotating shaft of the vehicle. Specifically, the annular mounting portion 200 is provided with a plurality of bolt holes 201, and the plurality of bolt holes 201 are arranged at intervals along the circumference of the brake disc 1000, and the brake disc 1000 is fixed to the rotating shaft by bolts.

[0071] In some embodiments, please refer to Figure 1, along the axial direction (Y-axis direction) of the disc body 100, a boss 202 is convexly provided on one side of the annular mounting portion 200. Specifically, along the Y-axis direction, the boss 202 is convexly provided on the side of the annular mounting portion 200 facing the ventilation group 106, and the side of the boss 202 away from the center of the circle is connected to the inner circumferential surface 104. There are multiple bosses 202, and the multiple bosses 202 are arranged at intervals along the circumference of the brake disc 1000. And along the circumference of the brake disc 1000, the multiple bosses 202 and the multiple bolt holes 201 are arranged alternately and at intervals. A slot is provided on the rotating shaft, and when the brake disc 1000 is installed on the rotating shaft, the boss 202 is inserted into the slot and abuts against the slot wall of the slot.

[0072] In this embodiment, by providing the boss 202, the boss 202 can disperse the stress of the disc body 100 and the annular mounting portion 200, so as to enhance the compressive strength of the brake disc 1000, prevent cracks from occurring in the brake disc 1000, and reduce mechanical losses. In addition, the boss 202 can disperse the heat of the brake disc 1000, which is conducive to improving the heat dissipation effect of the brake disc 1000.

[0073] The embodiment of the present application also provides a vehicle, including a frame, a rotating shaft, a caliper, a wheel, and a brake disc 1000 provided in the embodiment of the present application. The rotating shaft is rotatably connected to the frame, and the brake disc 1000 and the wheel are fixedly connected to the rotating shaft. The caliper is sleeved on both sides of the brake disc 1000 along the Y-axis direction, and a gap is reserved between the caliper and the brake disc 1000 on both sides along the Y-axis direction. When the vehicle is running, the rotating shaft drives the brake disc 1000 and the wheel to rotate. When the vehicle brakes, the caliper contracts and abuts against the first end face 101 and the second end face 102, and the caliper rubs against the first end face 101 and the second end face 102 to reduce the rotation speed of the rotating shaft and the wheel, so that the vehicle speed is reduced.

[0074] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea.

Claims

1. A brake disc, characterized in that: It comprises a disc body, the disc body is provided with a through hole, the disc body comprises an inner peripheral surface and an outer peripheral surface; the inner peripheral surface is the hole wall surface of the through hole; the outer peripheral surface is arranged opposite to the inner peripheral surface; The disk body is provided with a ventilation group, which includes a first air duct and a second air duct; the first air duct includes a first opening and a second opening, the first opening is arranged on the outer peripheral surface, and the second opening is arranged on the inner peripheral surface; the second air duct includes a third opening and a fourth opening, the third opening is arranged on the outer peripheral surface, and the third opening and the first opening are arranged at intervals along the circumference of the disk body; the fourth opening is connected to the first air duct; the first air duct and / or the second air duct are arranged in a curved manner.

2. The brake disc according to claim 1, characterized in that There are multiple ventilation groups, and the multiple ventilation groups are arranged at intervals along the circumference of the disk.

3. The brake disc according to claim 2, characterized in that The first air duct is bent, and the first air duct has at least three curvatures.

4. The brake disc according to claim 3, characterized in that The standard value of the curvature of the first air duct is u, and u needs to meet the following conditions: 0.0003mm -1 ≤u≤0.0345mm -1 .

5. The brake disc according to claim 3, characterized in that Along the axial direction of the disk body, the size of the first air duct is H1, and along the circumferential direction of the disk body, the size of the first air duct is D1. H1 and D1 need to meet the following condition: H1≤D1≤2.5H1.

6. The brake disc according to any one of claims 1 to 5, characterized in that The second air duct is bent, and the second air duct has at least three curvatures.

7. The brake disc according to claim 6, characterized in that The standard value of the curvature of the second air duct is v, and v needs to meet the following conditions: 0.0029 mm -1 ≤v≤0.0336mm -1 .

8. The brake disc according to claim 6, characterized in that The second air duct has a first angle a with the radial direction of the disk, and a needs to satisfy the following condition: 4°≤a≤15°.

9. The brake disc according to claim 8, characterized in that The second air duct and the first air duct have a second angle b, and b needs to meet the following condition: 25°≤b≤65°.

10. The brake disc according to claim 6, characterized in that Along the axial direction of the disk body, the size of the second air duct is H2, and along the circumferential direction of the disk body, the size of the second air duct is D2. The H2 and D2 need to meet the following condition: H2≤D2≤2.5H2.

11. The brake disc according to any one of claims 1 to 5, characterized in that The disk body includes an outer disk and an inner disk, and the outer disk is connected to the inner disk along the radial direction of the disk body; the first air duct includes a first section and a second section, and the first section and the second section are connected; the first section is located on the outer disk, and the second section is located on the inner disk; the ratio of the volume of the first section to the volume of the outer disk is greater than the ratio of the volume of the second section to the volume of the inner disk.

12. The brake disc according to claim 11, characterized in that In the unit volume of the outer disk, the diameter of the first section is M1, in the unit volume of the inner disk, the diameter of the second section is N1, M1>N1; in the unit volume of the outer disk, the length of the first section is L1, in the unit volume of the inner disk, the length of the second section is X1, L1≥X1.

13. The brake disc according to claim 11, characterized in that The second air duct includes a third section and a fourth section, the third section is located in the outer disk, and the fourth section is located in the inner disk; the ratio of the volume of the third section to the volume of the outer disk is greater than the ratio of the volume of the fourth section to the volume of the inner disk.

14. The brake disc according to claim 13, characterized in that In the unit volume of the outer disk, the diameter of the third section is M2, and in the unit volume of the inner disk, the diameter of the fourth section is N2, M2>N2; in the unit volume of the outer disk, the length of the third section is L2, and in the unit volume of the inner disk, the length of the fourth section is X2, L2≥X2.

15. The brake disc according to any one of claims 1 to 5, characterized in that The disc body further comprises a first end surface and a second end surface, and along the axial direction of the disc body, the first end surface and the second end surface are opposite to each other; The ventilation group further includes a first ventilation hole, and at least one of the first end surface and the second end surface is provided with the first ventilation hole; the first ventilation hole is connected to the first air duct; And / or, the ventilation group further includes a second ventilation hole, and at least one of the first end surface and the second end surface is provided with the second ventilation hole; the second ventilation hole is connected to the second air duct.

16. A brake disc according to any one of claims 2 to 5, characterized in that In each of the ventilation groups, a line connecting the center of the third opening and the center of the fourth opening is a first connecting line; and an angle between two adjacent first connecting lines is less than 90 degrees.

17. The brake disc according to any one of claims 1 to 5, characterized in that It also includes an annular mounting portion, which is at least partially located in the through hole, and the outer circumference of the annular mounting portion is fixedly connected to the inner circumference of the disk body, and the second opening is at least partially offset from the annular mounting portion.

18. The brake disc according to claim 17, characterized in that A boss is protrudingly provided on one side of the annular mounting portion along the axial direction of the disc body.

19. A vehicle, characterized in that: A brake disc comprising the brake disc according to any one of claims 1 to 18.

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