Brake disc structure

Abstract

The utility model relates to a brake disc structure, and relates to the technical field of brakes. The brake disc structure comprises a disc body, a through hole is formed in the middle of the disc body, one side of the disc body is a supporting face, and the other side of the disc body is a friction face; an annular outer ring blocking edge is arranged on the supporting face of the disc body close to the outer periphery edge, an annular outer ring blocking edge is arranged on the supporting face of the disc body close to the inner side edge, and an annular boss is arranged on the supporting face of the disc body and located between the outer ring blocking edge and the inner ring blocking edge. A first annular air channel is formed between the outer ring blocking edge and the annular boss, and a second annular air channel is formed between the inner ring blocking edge and the annular boss. The outer ring retaining edge, the annular boss and the inner ring retaining edge are provided with a plurality of groups of first notch grooves which are opposite one by one so as to form a plurality of groups of cooling air ducts in the radial direction of the disc body; and the cooling air duct is communicated with the first annular air duct and the second annular air duct. According to the brake disc structure, the heat dissipation effect under the braking working condition is improved, the braking performance is improved, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of brakes, and in particular to a brake disc structure. Background Art

[0002] Brakes are components in the braking system that generate braking force to hinder the movement or movement trend of a vehicle. In addition to various retarder devices, brakes for land vehicles are almost all friction brakes that use the friction between the fixed element and the working surface of the rotating element to generate braking torque. According to the different rotating elements, they can be divided into two categories: drum type and disc type. The difference between them is that the rotating element in the friction pair of drum brakes is a brake drum, and its cylindrical surface is the working surface; the rotating element in the friction pair of disc brakes is a disc-shaped brake disc, and its end face is the working surface.

[0003] The brake disc structure is the main component of the disc brake and belongs to the friction pair of the disc brake. When working, it is not only subjected to large normal and tangential forces applied by the brake pads, but also withstands a much greater heat load than the brake drum. The maximum surface temperature can reach 800°C. Under high temperature, the brake disc structure may warp, resulting in friction noise and scratches, which will affect its braking effect and service life.

[0004] In order for the brake disc structure to have appropriate heat capacity and good heat dissipation performance, full consideration must be given to its structure and thickness.

[0005] The solid brake disc structure made of metal in the related art is usually between 20 and 22.5 mm thick; the material is mostly gray cast iron, or alloy cast iron with Cr, Ni, etc. Its heat resistance, heat dissipation and heat capacity are still insufficient. Especially when used in heavy-load vehicles such as subways, which require frequent starting, stopping and braking, it is difficult to meet the requirements for high performance, lightness and stability of the braking system. Utility Model Content

[0006] In order to improve the heat dissipation effect, braking performance and service life of a brake disc structure, the present application provides a brake disc structure.

[0007] The brake disc structure provided in this application adopts the following technical solution:

[0008] A brake disc structure comprises a disc body, a through hole is opened in the middle of the disc body, one side of the disc body is a support surface, and the other side of the disc body is a friction surface;

[0009] An annular outer ring retaining edge is arranged on the support surface of the disk body near the outer peripheral edge, an annular outer ring retaining edge is arranged on the support surface of the disk body near the inner edge, and an annular boss is arranged on the support surface of the disk body between the outer ring retaining edge and the inner ring retaining edge;

[0010] A first annular air duct is formed between the outer ring retaining edge and the annular boss, and a second annular air duct is formed between the inner ring retaining edge and the annular boss; a plurality of groups of first notch grooves facing each other are provided on the outer ring retaining edge, the annular boss and the inner ring retaining edge to form a plurality of groups of cooling air ducts along the radial direction of the disk body; the cooling air duct is connected with the first annular air duct and the second annular air duct.

[0011] In the present application, the structure of the supporting surface of the disc body is optimized, and multiple groups of cooling air ducts and a first annular air duct and a second annular air duct are cleverly designed; by adopting the above technical scheme, the cooling air duct and the first annular air duct and the second annular air duct are used in coordination for ventilation and heat dissipation, thereby improving the ventilation and heat dissipation effect during braking, reducing the temperature during braking, thereby improving braking performance, and minimizing the weight of the brake disc structure, achieving a lightweight effect.

[0012] Optionally, the two ends of the cooling air duct respectively penetrate the hole wall of the through hole and the outer peripheral surface of the disk body, and the first notch groove wall and the bottom surface of the inner ring retaining edge are smoothly transitioned to the hole wall of the through hole by chamfering, and the first notch groove wall and the bottom surface of the outer ring retaining edge are also smoothly transitioned to the outer peripheral surface of the disk body by chamfering.

[0013] By adopting the above technical solution, the cooling air duct runs through both sides of the disc body, ensuring that cold air can flow directly and evenly into the brake disc structure, improving the heat exchange efficiency between the disc body and the air, effectively reducing the temperature during braking, and thus significantly improving braking performance.

[0014] Optionally, the side surfaces of the outer ring retaining edge and the annular boss are smoothly transitioned to the bottom of the first annular air duct through rounded corners, and the side surfaces of the inner ring retaining edge and the annular boss are smoothly transitioned to the bottom of the second annular air duct through rounded corners.

[0015] By adopting the above technical solution, the cold air flow can flow more smoothly in the first annular air duct and the second annular air duct, further improving the air cooling effect.

[0016] Optionally, the cooling air ducts are evenly spaced along the circumference of the disk, and all cooling air ducts are centrally symmetrically distributed with the center of the disk as the center point.

[0017] By adopting the above technical solution, the cooling air ducts on both sides of the disc body are arranged relatively to each other and run through both sides of the disc body, so that the cold air can convect more easily, and can directly and evenly flow into the brake disc structure and then flow out quickly, thereby efficiently taking away the heat generated by friction of the disc body, effectively controlling the temperature of the disc body during braking, and improving its braking performance.

[0018] Optionally, the inner ring retaining edge, the annular boss and the outer ring retaining edge have the same height, and the first notch groove on the outer ring retaining edge, the first notch groove on the annular boss and the first notch groove on the inner ring retaining edge have the same width and depth.

[0019] By adopting the above technical solution, the airflow is facilitated and no obstruction occurs.

[0020] Optionally, the bottoms of the first notch groove on the outer ring retaining edge, the first notch groove on the annular boss, and the first notch groove on the inner ring retaining edge are all flush with the bottoms of the first annular air duct and the second annular air duct.

[0021] By adopting the above technical solution, the unique cooling air duct cooperates with the first annular air duct and the second annular air duct to ensure the smoothness of air flow, greatly improves the ventilation and heat dissipation effect during braking, and improves the weight reduction effect.

[0022] Optionally, a positioning key groove is further provided on the annular boss, and the positioning key groove penetrates the inner and outer sides of the annular boss along the radial direction of the disk body.

[0023] By adopting the above technical solution, the positioning key slot facilitates the positioning and installation of the disk body, and can also achieve certain ventilation, heat dissipation and weight reduction effects.

[0024] Optionally, a second notch groove which is directly opposite to the positioning key groove is formed on the inner ring retaining edge and the outer ring retaining edge, and the depth of the second notch groove is greater than the depth of the positioning key groove.

[0025] By adopting the above technical solution, the second notch groove can further improve the ventilation and heat dissipation effects and the weight reduction effects.

[0026] Optionally, the annular boss is further provided with a plurality of mounting holes, the mounting holes are spaced apart along the circumference of the annular boss, and at least one mounting hole is provided on the portion of the annular boss between any two adjacent groups of the cooling air ducts;

[0027] The mounting hole is a stepped hole, the large hole of the mounting hole extends through the friction surface of the disc body, and the large hole of the mounting hole extends through the outer side surface of the annular boss.

[0028] By adopting the above technical solution, when installing the disc body, the disc body is fixed by inserting a bolt into the mounting hole, and the head of the bolt is inserted into the large hole of the step hole to prevent the friction surface of the bolt from protruding from the disc body and interfering with the brake part; at the same time, the layout design of the above connection structure can ensure the uniformity of the force on the disc body and ensure the stable and reliable installation.

[0029] Optionally, the disc body is in a circular ring shape and is made of carbon ceramic material; the disc body, the outer ring retaining edge, the annular boss and the inner ring retaining edge are integrally formed.

[0030] The traditional metal brake disc structure has poor high / low temperature resistance, and the heat generated during braking is difficult to dissipate quickly, which can easily lead to a decrease in braking performance; during high-frequency and continuous braking, the disc temperature will rise rapidly, the braking performance will significantly decrease, and it is easy to have a short-term brake failure, and the continuous braking performance is poor. The weight of the metal brake disc structure is relatively large, and it cannot meet the lightweight requirements of special fields such as subways. The metal brake disc structure is easy to rust and has poor corrosion resistance, which will affect its service life and performance. It also has poor wear resistance and requires frequent maintenance during use. In this application, the entire disc body including the inner ring boss and the outer ring boss can be made of high-quality carbon ceramic material, and is integrally formed through preform needle puncture, deposition, high temperature and other processes. By adopting the above technical solution, the problems of the above-mentioned metal brake disc structure are solved. The brake disc structure in this application is resistant to high / low temperatures, corrosion, and wear, and has high heat capacity and a long service life.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. The brake disc structure in the present application utilizes a plurality of ingeniously designed cooling air ducts and a first annular air duct and a second annular air duct for ventilation and heat dissipation, thereby improving the ventilation and heat dissipation effect during braking, thereby reducing the temperature rise of the brake disc structure during braking, ensuring the braking effect, and improving its braking performance and service life.

[0033] 2. The brake disc structure in the present application is provided with a cooling air duct, a first annular air duct, a second annular air duct, a first notch groove and a second notch groove, so that the brake disc structure is lightweight to the greatest extent.

[0034] 3. The brake disc structure in this application is made of carbon ceramic material, which is wear-resistant, high-temperature-resistant and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a first three-dimensional structural schematic diagram of the brake disc structure in this application.

[0036] Figure 2 It is a second three-dimensional structural schematic diagram of the brake disc structure in this application.

[0037] Figure 3 It is a schematic cross-sectional view of the brake disc structure in this application.

[0038] In the figure:

[0039] 10. disc body; 11. through hole; 12. support surface; 13. friction surface; 14. first annular air duct; 15. second annular air duct; 16. cooling air duct;

[0040] 20. Outer ring retaining edge;

[0041] 30. annular boss; 31. positioning keyway; 32. mounting hole;

[0042] 40. Inner ring retaining edge;

[0043] 50. first notch groove;

[0044] 60. second notch groove;

[0045] 70. Rounded corners. DETAILED DESCRIPTION

[0046] The following is combined with Figure 1 -Attached Figure 3 , further details of this application are given.

[0047] The brake disc structure in this application is used in the braking system of land transportation vehicles, especially in the braking of large transportation vehicles such as urban subways. As a rapid urban rail transportation vehicle, the subway has the advantages of large capacity, high efficiency, and low pollution. The subway needs to start and brake frequently during operation, and the load is large, which has high requirements for the performance, lightness, and stability of the braking system.

[0048] Reference Figure 1 and Figure 2As shown, the brake disc structure in the present application includes a disc body 10, a through hole 11 is opened in the middle of the disc body 10, the disc body 10 is in a circular ring shape as a whole, one side of the disc body 10 is a support surface 12, and the other side is a friction surface 13; an annular outer ring retaining edge 20 is arranged on the support surface 12 of the disc body 10 near the outer peripheral edge, an annular outer ring retaining edge 20 is arranged on the support surface 12 of the disc body 10 near the inner edge, and an annular boss 30 is arranged on the support surface 12 of the disc body 10 between the outer ring retaining edge 20 and the inner ring retaining edge 40; a first annular air duct 14 is formed between the outer ring retaining edge 20 and the annular boss 30, and the outer ring retaining edge 20 is provided with a first annular air duct 14. The side surfaces and the side surfaces of the annular boss 30 are smoothly transitioned to the bottom of the first annular air duct 14 through the chamfered corners 70, and the second annular air duct 15 is formed between the inner ring retaining edge 40 and the annular boss 30. The side surfaces of the inner ring retaining edge 40 and the side surfaces of the annular boss 30 and the bottom of the second annular air duct 15 are also smoothly transitioned through the chamfered corners 70. Several groups of first notch grooves 50 facing each other are provided on the outer ring retaining edge 20, the annular boss 30 and the inner ring retaining edge 40, thereby forming several groups of cooling air ducts 16 along the radial direction of the disk body 10. The cooling air duct 16 is connected to the first annular air duct 14 and the second annular air duct 15. The two ends of the cooling air duct 16 respectively penetrate the hole wall of the through hole 11 and the outer peripheral surface of the disc body 10, ensuring that the cold air can flow directly and evenly into the brake disc structure; the groove wall and the bottom surface of the first notch groove 50 of the inner ring retaining edge 40 and the hole wall of the through hole 11 are smoothly transitioned through the chamfer 70, and the groove wall and the bottom surface of the first notch groove 50 of the outer ring retaining edge 20 and the outer peripheral surface of the disc body 10 are also smoothly transitioned through the chamfer 70, ensuring the smoothness of air circulation.

[0049] Reference Figure 1 As shown, in the present application, the cooling air ducts 16 are evenly spaced and distributed along the circumference of the disc body 10, and all the cooling air ducts 16 are centrally symmetrically distributed with the center of the disc body 10 as the center point. The cooling air ducts 16 on both sides of the disc body 10 are arranged relatively, and penetrate both sides of the disc body 10, so that the cold air is easier to convect, and can directly and evenly flow into the inside of the brake disc structure and then flow out quickly, so as to efficiently take away the heat generated by friction of the disc body 10, effectively control the temperature of the disc body 10 during braking, and improve its braking performance. As a preferred solution, there are six groups of cooling air ducts 16.

[0050] Reference Figure 1As shown, in the present application, the inner ring retaining edge 40, the annular boss 30 and the outer ring retaining edge 20 have the same height, and the bottoms of the first notch groove 50 on the outer ring retaining edge 20, the first notch groove 50 on the annular boss 30 and the first notch groove 50 on the inner ring retaining edge 40 are all flush with the bottoms of the first annular air duct 14 and the second annular air duct 15; the first notch groove 50 on the outer ring retaining edge 20, the first notch groove 50 on the annular boss 30 and the first notch groove 50 on the inner ring retaining edge 40 have the same width and depth, thereby ensuring the smoothness of airflow.

[0051] Reference Figure 1 and Figure 3 As shown, the annular boss 30 is also provided with a positioning key groove 31, which penetrates the inner and outer sides of the annular boss 30 along the radial direction of the disk body 10; the inner ring retaining edge 40 and the outer ring retaining edge 20 are also provided with a second notch groove 60 which is directly opposite to the positioning key groove 31, and the depth of the second notch groove 60 is greater than the depth of the positioning key groove 31. The positioning key groove 31 is used for positioning and installing the disk body 10, and the positioning key groove 31 and the second notch groove 60 can also play a certain ventilation and heat dissipation effect and weight reduction effect.

[0052] Reference Figure 1 and Figure 3 As shown, the annular boss 30 is also provided with a plurality of mounting holes 32, which are spaced apart along the circumference of the annular boss 30, and at least one mounting hole 32 is provided on the portion of the annular boss 30 between any two adjacent groups of cooling air ducts 16; the mounting hole 32 is a stepped hole, and the large hole of the mounting hole 32 extends through the friction surface 13 of the disk body 10, and the large hole of the mounting hole 32 extends through the outer side of the annular boss 30. As a preferred solution, in this embodiment, the annular boss 30 is provided with a positioning keyway 31 and two mounting holes 32 on the portion of the annular boss 30 between any two adjacent groups of cooling air ducts 16, the positioning keyway 31 is located in the middle of the portion of the annular boss 30, and the two mounting holes 32 on the portion of the annular boss 30 are symmetrically distributed on both sides of the positioning keyway 31. When installing the disc body 10, the disc body 10 is fixed by inserting a bolt into the mounting hole 32, and the head of the bolt is inserted into the large hole of the step hole to prevent the friction surface 13 protruding from the disc body 10 from interfering with the brake part; at the same time, the above-mentioned connection structure is used to ensure the uniformity of the force on the disc body 10 and the stable and reliable installation.

[0053] In the present application, the disc body 10 is made of carbon ceramic material; the disc body 10 is integrally formed with the outer ring retaining edge 20, the annular boss 30 and the inner ring retaining edge 40. In the present application, the entire disc body 10 including the inner ring boss and the outer ring boss can be made of high-quality carbon ceramic material, and is integrally formed through preform needle puncture, deposition, high temperature and other processes. It achieves lightweight requirements, and has excellent high / low temperature resistance, corrosion resistance, wear resistance, high heat capacity and long service life.

[0054] The implementation principle is as follows: in this application, the structure of the support surface 12 of the disc body 10 is optimized, and multiple groups of cooling air ducts 16 and the first annular air duct 14 and the second annular air duct 15 are cleverly designed; the cooling air duct 16 and the first annular air duct 14 and the second annular air duct 15 are used in coordination with each other for ventilation and heat dissipation, thereby improving the ventilation and heat dissipation effect during braking, reducing the temperature during braking, thereby improving braking performance, and minimizing the weight of the brake disc structure to achieve a lightweight effect.

[0055] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A brake disc structure, comprising a disc body (10), wherein a through hole (11) is provided in the middle of the disc body (10), one side of the disc body (10) is a support surface (12), and the other side of the disc body (10) is a friction surface (13); It is characterized in that An annular outer ring retaining edge (20) is provided on the support surface (12) of the disk body (10) near the outer peripheral edge, an annular outer ring retaining edge (20) is provided on the support surface (12) of the disk body (10) near the inner edge, and an annular boss (30) is provided on the support surface (12) of the disk body (10) between the outer ring retaining edge (20) and the inner ring retaining edge (40); A first annular air duct (14) is formed between the outer ring retaining edge (20) and the annular boss (30), and a second annular air duct (15) is formed between the inner ring retaining edge (40) and the annular boss (30); a plurality of groups of first notch grooves (50) facing each other are provided on the outer ring retaining edge (20), the annular boss (30) and the inner ring retaining edge (40) so as to form a plurality of groups of cooling air ducts (16) along the radial direction of the disk body (10); the cooling air duct (16) is connected with the first annular air duct (14) and the second annular air duct (15).

2. The brake disc structure according to claim 1, characterized in that: The two ends of the cooling air duct (16) respectively penetrate the hole wall of the through hole (11) and the outer peripheral surface of the disk body (10); the groove wall and the bottom surface of the first notch groove (50) of the inner ring retaining edge (40) and the hole wall of the through hole (11) are smoothly transitioned through a chamfer (70); the groove wall and the bottom surface of the first notch groove (50) of the outer ring retaining edge (20) and the outer peripheral surface of the disk body (10) are also smoothly transitioned through a chamfer (70).

3. The brake disc structure according to claim 1 or 2, characterized in that: The side surfaces of the outer ring retaining edge (20) and the annular boss (30) are smoothly transitioned to the bottom of the first annular air duct (14) through the rounded corners (70), and the side surfaces of the inner ring retaining edge (40) and the annular boss (30) are smoothly transitioned to the bottom of the second annular air duct (15) through the rounded corners (70).

4. The brake disc structure according to claim 1 or 2, characterized in that: The cooling air channels (16) are evenly spaced along the circumference of the disk body (10), and all cooling air channels (16) are centrally symmetrically distributed with the center of the disk body (10) as the center point.

5. The brake disc structure according to claim 1 or 2, characterized in that: The inner ring retaining edge (40), the annular boss (30) and the outer ring retaining edge (20) have the same height, and the first notch groove (50) on the outer ring retaining edge (20), the first notch groove (50) on the annular boss (30) and the first notch groove (50) on the inner ring retaining edge (40) all have the same width and depth.

6. The brake disc structure according to claim 5, characterized in that: The bottoms of the first notch groove (50) on the outer ring retaining edge (20), the first notch groove (50) on the annular boss (30) and the first notch groove (50) on the inner ring retaining edge (40) are all flush with the bottoms of the first annular air duct (14) and the second annular air duct (15).

7. The brake disc structure according to claim 5, characterized in that: The annular boss (30) is also provided with a positioning key groove (31), and the positioning key groove (31) penetrates the inner and outer sides of the annular boss (30) along the radial direction of the disk body (10).

8. The brake disc structure according to claim 7, characterized in that: The inner ring retaining edge (40) and the outer ring retaining edge (20) are both provided with second notch grooves (60) which are directly opposite to the positioning key grooves (31); the depth of the second notch grooves (60) is the same as the depth of the first notch grooves (50); and the depth of the second notch grooves (60) is greater than the depth of the positioning key grooves (31).

9. The brake disc structure according to claim 1 or 2, characterized in that: The annular boss (30) is also provided with a plurality of mounting holes (32), the mounting holes (32) being distributed at intervals along the circumference of the annular boss (30), and at least one mounting hole (32) is provided on the portion of the annular boss (30) located between any two adjacent groups of the cooling air ducts (16); The mounting hole (32) is a stepped hole, the large hole of the mounting hole (32) extends through the friction surface (13) of the disc body (10), and the large hole of the mounting hole (32) extends through the outer side surface of the annular boss (30).

10. The brake disc structure according to claim 1 or 2, characterized in that: The disc body (10) is in the shape of a ring and is made of carbon ceramic material; the disc body (10) is integrally formed with the outer ring retaining edge (20), the annular boss (30) and the inner ring retaining edge (40).

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