Brake disc, brake device and vehicle

Abstract

The brake disc comprises a main disc body, a first composite disc and a second composite disc, the main disc body, the first composite disc and the second composite disc are annular, the first composite disc is attached and fixed to the surface of one axial side of the main disc body, and the second composite disc is attached and fixed to the surface of the other axial side of the main disc body. The second composite disc is fixedly attached to the surface of the other axial side of the main disc body; the material density of the main disc body is smaller than that of the first composite disc and that of the second composite disc. According to the brake disc, due to the fact that the material density of the main disc body is smaller than the material density of the first composite disc and the material density of the second composite disc, under the same size, the brake disc is lighter than an existing solid brake disc made of cast iron materials, and the purpose of light weight of the brake disc is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of brake systems and relates to a brake disc, a brake device and a vehicle. Background Art

[0002] The brake disc is one of the important components in the automobile braking system. When the car is driving, the brake disc is connected to the wheel hub and rotates synchronously. At this time, there is a gap between the friction plate and the brake disc to prevent the friction plate and the brake disc from contacting and generating braking torque. When the car brakes, the friction plate and the brake disc fit together, and the contact surface generates a large friction force, which hinders the car from decelerating. Therefore, the performance of the brake disc directly affects the safety of the car.

[0003] Cast iron solid brake discs are currently widely used in rear brakes due to their low price and easy manufacturing. However, due to their large mass, the vehicle's fuel consumption also increases, which has an adverse effect on the vehicle's power and energy economy. Utility Model Content

[0004] The technical problem to be solved by the utility model is: to provide a brake disc, a brake device and a vehicle in view of the problem that the cast iron solid brake disc in the prior art has a large mass.

[0005] In order to solve the above technical problems, on the one hand, the utility model provides a brake disc, including a main disc body, a first composite disc and a second composite disc, wherein the main disc body, the first composite disc and the second composite disc are annular, the first composite disc is attached to one axial side surface of the main disc body, and the second composite disc is attached to the other axial side surface of the main disc body;

[0006] The material density of the main disk body is smaller than the material density of the first composite disk and the second composite disk.

[0007] According to the brake disc of the embodiment of the utility model, the first composite disc is attached to one axial side surface of the main disc body, and the second composite disc is attached and fixed to the other axial side surface of the main disc body. Compared with the solid brake disc made of a single cast iron material in the prior art, the brake disc of the present application is lighter than the existing solid brake disc made of cast iron material at the same volume because the material density of the main disc body is less than that of the first composite disc and the second composite disc, so as to achieve the purpose of lightweighting the brake disc. In this way, the fuel consumption of the vehicle can be reduced, and the power and energy economy of the vehicle can be improved.

[0008] Optionally, the friction coefficients of the first composite disk and the second composite disk are greater than the friction coefficient of the main disk body.

[0009] Optionally, the volume of the first composite disk is smaller than the volume of the main disk body, and the volume of the second composite disk is smaller than the volume of the main disk body.

[0010] Optionally, the thickness of the first composite disk is smaller than the thickness of the main disk body, and the thickness of the second composite disk is smaller than the thickness of the main disk body;

[0011] The thickness of the first composite disk is greater than or equal to 1 mm, and the thickness of the second composite disk is greater than or equal to 1 mm.

[0012] Optionally, the outer diameter of the first composite disk is smaller than or equal to the outer diameter of the main disk body, and the outer diameter of the second composite disk is smaller than or equal to the outer diameter of the main disk body.

[0013] Optionally, the main disk body includes a main disk body and a disk cap, the bottom of the disk cap is connected to the inner circle of the main disk body, and the disk cap protrudes in a direction away from the second composite disk and passes through the inner hole of the first composite disk.

[0014] Optionally, the main disk body is in an annular shape, the first composite disk and the second composite disk are in an annular shape, and the inner diameters of the first composite disk and the second composite disk are greater than the outer diameter of the disk cap.

[0015] Optionally, it further comprises a plurality of ribs, wherein the plurality of ribs are located between the first composite disk and the second composite disk, and are connected to at least one of the first composite disk and the second composite disk;

[0016] The main plate body is provided with a plurality of slots, and the slots at least penetrate the surface of the main plate body facing the first composite plate;

[0017] Along the axial direction of the brake disc, each rib is embedded in the opposite slot.

[0018] Optionally, the plurality of ribs are arranged at equal intervals along the circumferential direction of the brake disc, and the plurality of slots are arranged at equal intervals along the circumferential direction of the brake disc;

[0019] and / or,

[0020] The protruding heights of the plurality of ribs are the same, and the depths of the plurality of slots are the same.

[0021] Optionally, the ribs extend in a radial direction of the brake disc, and the slots extend in a radial direction of the brake disc.

[0022] Optionally, the rib is in a rectangular parallelepiped shape, the length of the rib is less than the sum of the inner and outer diameters of the main plate body, and the protruding height of the rib is less than or equal to the thickness of the main plate body;

[0023] The width of the rib is greater than or equal to 10 mm.

[0024] Optionally, the first composite disk, the second composite disk and the plurality of ribs are integrally formed.

[0025] Optionally, the first composite disk and the second composite disk are made of cast iron, and the main disk body is made of aluminum alloy, aluminum alloy ceramic or carbon fiber ceramic.

[0026] On the other hand, the embodiment of the utility model further provides a braking device, comprising a brake clamp, a first friction plate, a second friction plate and the above-mentioned brake disc, wherein a surface of the first composite disc facing away from the second composite disc is a first friction surface, and a surface of the second composite disc facing away from the first composite disc is a second friction surface;

[0027] The brake clamp can push the first friction plate and the second friction plate to move toward each other, so that the first friction plate can be pressed against the first friction surface, and the second friction plate can be pressed against the second friction surface, so as to achieve braking of the brake disc.

[0028] The brake device provided in the embodiment of the utility model has all the advantages of the above-mentioned brake disc.

[0029] On the other hand, an embodiment of the present invention further provides a vehicle, comprising the above-mentioned brake disc.

[0030] The vehicle provided in the embodiment of the utility model has all the advantages of the above-mentioned brake disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of a brake disc provided by an embodiment of the utility model;

[0032] Figure 2 It is a schematic diagram of the combination of a first composite disc, a second composite disc and a plurality of reinforcing ribs provided in one embodiment of the utility model;

[0033] Figure 3 yes Figure 2 Schematic diagram without the first composite disk;

[0034] Figure 4 It is a schematic diagram of a main disc body of a brake disc provided by an embodiment of the utility model.

[0035] The reference numerals in the specification are as follows:

[0036] 1. Main plate body; 11. Main plate body; 12. Plate cap; 13. Slot hole; 2. First composite plate; 3. Second composite plate; 4. Ribs. DETAILED DESCRIPTION

[0037] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0038] See also Figures 1 to 4 The brake disc provided by an embodiment of the utility model comprises a main disc body 1, a first composite disc 2 and a second composite disc 3. The main disc body 1, the first composite disc 2 and the second composite disc 3 are annular, the first composite disc 2 is attached to one axial side surface of the main disc body 1, and the second composite disc 3 is attached to the other axial side surface of the main disc body 1; the material density of the main disc body 1 is less than the material density of the first composite disc 2 and the second composite disc 3. The first composite disc 2 and the second composite disc 3 are wrapped on both axial side surfaces of the main disc body 1, which can protect the main disc body 1 and limit the position of the main disc body 1.

[0039] According to the brake disc of the embodiment of the utility model, the first composite disc 2 is attached to one axial side surface of the main disc body 1, and the second composite disc 3 is attached and fixed to the other axial side surface of the main disc body 1. Compared with the solid brake disc made of a single cast iron material in the prior art, the brake disc of the present application is lighter than the existing solid brake disc made of cast iron material at the same volume because the material density of the main disc body 1 is less than that of the first composite disc 2 and the second composite disc 3, so as to achieve the purpose of lightweighting the brake disc. In this way, the fuel consumption of the vehicle can be reduced, and the power and energy economy of the vehicle can be improved.

[0040] The surface of the first composite disc 2 facing away from the second composite disc 3 is the friction area on one side of the brake disc, and the surface of the second composite disc 3 facing away from the first composite disc 2 is the friction area on the other side of the brake disc. During braking, the brake clamp can push the two friction plates to move toward each other, so that one of the friction plates can be pressed against the friction area on the first composite disc 2, and the other friction plate can be pressed against the friction area on the second composite disc 3, generating a braking torque to achieve the braking of the brake disc. During braking, a large amount of heat is generated. In the direction of heat transfer, the surface of the first composite disc 2 away from the second composite disc 3 and the surface of the second composite disc 3 away from the first composite disc 2 are in contact with the air, and the heat is transferred to the surrounding environment of the brake disc through convection heat transfer, while the surface of the first composite disc 2 close to the second composite disc 3 and the surface of the second composite disc 3 close to the first composite disc 2 are in contact with the main disc body 1, and the heat is transferred to the main disc body 1 through the effect of heat conduction, and part of the heat in the main disc body 1 is stored in the main disc body 1, and the other part is diffused to the surrounding environment of the brake disc by convection heat transfer to achieve the heat dissipation of the brake disc. In one embodiment, the friction coefficients of the first composite disk 2 and the second composite disk 3 are greater than the friction coefficient of the main disk body 1 .

[0041] In one embodiment, the volume of the first composite disk 2 is smaller than the volume of the main disk body 1 , and the volume of the second composite disk 3 is smaller than the volume of the main disk body 1 .

[0042] In one embodiment, the thickness of the first composite plate 2 is less than the thickness of the main plate body 1, and the thickness of the second composite plate 3 is less than the thickness of the main plate body 1. The thickness of the first composite plate 2 is greater than or equal to 1 mm, ensuring that the thickness of the second composite plate 3 is greater than or equal to 1 mm. While taking into account lightweight, the structural strength of the first composite plate 2 and the second composite plate 3 is guaranteed.

[0043] In one embodiment, the outer diameter of the first composite disk 2 is smaller than or equal to the outer diameter of the main disk body 1, and the outer diameter of the second composite disk 3 is smaller than or equal to the outer diameter of the main disk body 1. That is, the first composite disk 2 and the second composite disk 3 do not protrude from the outer edge of the main disk body 1 in the radial direction.

[0044] In one embodiment, see Figure 1 and Figure 4 The main disc body 1 includes a main disc body 11 and a disc cap 12. The bottom of the disc cap 12 is connected to the inner ring of the main disc body 11. The disc cap 12 protrudes in a direction away from the second composite disc 3 and passes through the inner hole of the first composite disc 2. The side of the disc cap 12 away from the second composite disc 3 is used to connect with the wheel hub, and the side of the disc cap 12 close to the second composite disc 3 is used to connect with the bearing flange. The disc cap 12 can be integrally formed with the main disc body 11, or they can be formed separately and then fixed together.

[0045] In one embodiment, the main disk body 11 is annular, the first composite disk 2 and the second composite disk 3 are annular, and the inner diameters of the first composite disk 2 and the second composite disk 3 are larger than the outer diameters of the disk cap 12. The outer diameters of the first composite disk 2 and the second composite disk 3 are smaller than or equal to the outer diameter of the main disk body 11.

[0046] In one embodiment, a plurality of ribs 4 are further included, and the plurality of ribs 4 are located between the first composite disk 2 and the second composite disk 3, and are connected to at least one of the first composite disk 2 and the second composite disk 3. That is, the ribs 4 are connected to the first composite disk 2 and are separated from the second composite disk 3, or the ribs 4 are connected to the second composite disk 3 and are separated from the first composite disk 2, or the ribs 4 are connected to the first composite disk 2 and the first composite disk 3.

[0047] In one embodiment, the main disc body 1 is provided with a plurality of slots 13, and the slots 13 at least penetrate the surface of the main disc body 11 facing the first composite disc 2. That is, the slots 13 may be through holes (penetrating the two side surfaces of the main disc body 11 in the thickness direction), or the slots 13 may be blind holes (the end of the slots 13 away from the first composite disc 2 is closed). Along the axial direction of the brake disc, each of the ribs 4 is embedded in the opposite slot 13. In this way, the main disc body 1 and the first composite disc 2 and / or the second composite disc 3 can be fixed in the circumferential direction, and the first composite disc 2 and / or the second composite disc 3 can be restricted from rotating relative to the main disc body 1.

[0048] Preferably, the rib 4 simultaneously connects the first composite disk 2 and the first composite disk 3. In this way, the rib 4 is embedded in the opposite slot 13, which can fix the main disk body 1 and the first composite disk 2 and the second composite disk 3 in the circumferential direction, and limit the rotation of the first composite disk 2 and the second composite disk 3 relative to the main disk body 1. The rib 4 simultaneously connects the first composite disk 2 and the first composite disk 3, and embeds the rib 4 in the slot 13 of the main disk body 1, so that the first composite disk 2 is attached to one axial side surface of the main disk body 1, and the second composite disk 3 is attached to the other axial side surface of the main disk body 1.

[0049] Of course, in other embodiments, if the ribs 4 are removed, the first composite disk 2 and the second composite disk 3 can be fixed to the axial sides of the main disk body 1 by other means, for example, by bolt connection, riveting, gluing, etc.

[0050] In one embodiment, the plurality of ribs 4 are arranged at equal intervals along the circumferential direction of the brake disc, and the plurality of slots 13 are arranged at equal intervals along the circumferential direction of the brake disc.

[0051] In one embodiment, the protruding heights of the plurality of ribs 4 are the same, and the depths of the plurality of slots 13 are the same.

[0052] In one embodiment, the ribs 4 extend in the radial direction of the brake disc, and the slots 13 extend in the radial direction of the brake disc.

[0053] In one embodiment, the rib 4 is in the shape of a rectangular parallelepiped, the length of the rib 4 is less than the sum of the inner and outer diameters of the main disk body 11, the protruding height of the rib 4 is less than or equal to the thickness of the main disk body 11; the width of the rib 4 is greater than or equal to 10 mm to ensure the strength of the connection area between the rib 4 and the slot 13.

[0054] When the slot hole 13 is a through hole, the protruding height of the rib 4 is equal to the thickness of the main plate body 11 .

[0055] When the slot hole 13 is a blind hole, the protruding height of the rib 4 is smaller than the thickness of the main plate body 11 .

[0056] In a preferred embodiment, the first composite disc 2, the second composite disc 3 and the plurality of ribs 4 are integrally formed. The specific molding method is to place the main disc body 1 in a casting mold, integrally cast the first composite disc 2, the second composite disc 3 and the plurality of ribs 4, the first composite disc 2 and the second composite disc 3 are wrapped on both axial sides of the main disc body 1, and the plurality of ribs 4 are embedded in the plurality of slots 13 of the main disc body 1. The advantage of the integral molding of the first composite disc 2, the second composite disc 3 and the plurality of ribs 4 is that no additional fasteners are required, the number of parts is small, and the weight is light.

[0057] Of course, in other embodiments, the first composite plate 2 and the plurality of ribs 4 may be integrally formed, and the second composite plate 3 may be formed separately. In this case, the second composite plate 3 may be fixed to the main plate body 1 and the plurality of ribs 4 in other ways, such as bolt connection, riveting, gluing, etc.

[0058] Of course, in other embodiments, the second composite plate 3 and the plurality of ribs 4 may be integrally formed, and the first composite plate 1 may be formed separately. In this case, the first composite plate 2 may be fixed to the main plate body 1 and the plurality of ribs 4 by other means, such as bolt connection, riveting, gluing, etc.

[0059] Of course, in other embodiments, the first composite plate 2, the second composite plate 3 and the plurality of ribs 4 may be formed separately. In this case, the first composite plate 2 and the second composite plate 3 may be fixed to the main plate body 1 and the plurality of ribs 4 in other ways, such as bolt connection, riveting, gluing, etc.

[0060] In one embodiment, the first composite plate 2 and the second composite plate 3 are made of cast iron, such as HT250, HT150 or HT200. The main plate body 1 is made of lightweight materials such as aluminum alloy, aluminum alloy ceramic or carbon fiber ceramic.

[0061] Compared with the existing cast iron solid brake disc, the brake disc of the utility model can reduce the weight by 45% under the condition of the same external dimensions.

[0062] On the other hand, an embodiment of the utility model also provides a braking device, including a brake clamp, a first friction plate, a second friction plate and the above-mentioned brake disc, wherein the surface of the first composite disc 2 facing away from the second composite disc 3 is a first friction surface, and the surface of the second composite disc 3 facing away from the first composite disc 2 is a second friction surface; the brake clamp can push the first friction plate and the second friction plate to move toward each other, so that the first friction plate can be pressed against the first friction surface, and the second friction plate can be pressed against the second friction surface, so as to realize braking of the brake disc.

[0063] The brake clamp can also drive the first friction plate and the second friction plate to move in opposite directions, so that the first friction plate is separated from the first friction surface and the second friction plate is separated from the second friction surface, so as to release the brake.

[0064] The brake device provided in the embodiment of the utility model has all the advantages of the above-mentioned brake disc.

[0065] On the other hand, an embodiment of the present invention further provides a vehicle, comprising the above-mentioned brake disc.

[0066] The vehicle provided in the embodiment of the utility model has all the advantages of the above-mentioned brake disc.

[0067] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A brake disc, characterized in that: It comprises a main disk body, a first composite disk and a second composite disk, wherein the main disk body, the first composite disk and the second composite disk are annular, the first composite disk is attached and fixed to one axial side surface of the main disk body, and the second composite disk is attached and fixed to the other axial side surface of the main disk body; The material density of the main disk body is smaller than the material density of the first composite disk and the second composite disk.

2. The brake disc according to claim 1, characterized in that The friction coefficients of the first composite disk and the second composite disk are greater than the friction coefficient of the main disk body.

3. The brake disc according to claim 1, characterized in that The volume of the first composite disk is smaller than that of the main disk body, and the volume of the second composite disk is smaller than that of the main disk body.

4. The brake disc according to claim 1, characterized in that The thickness of the first composite disk is smaller than the thickness of the main disk body, and the thickness of the second composite disk is smaller than the thickness of the main disk body; The thickness of the first composite disk is greater than or equal to 1 mm, and the thickness of the second composite disk is greater than or equal to 1 mm.

5. The brake disc according to claim 1, characterized in that The outer diameter of the first composite disk is smaller than or equal to the outer diameter of the main disk body, and the outer diameter of the second composite disk is smaller than or equal to the outer diameter of the main disk body.

6. The brake disc according to claim 1, characterized in that The main disk body comprises a main disk body and a disk cap, the bottom of the disk cap is connected to the inner circle of the main disk body, and the disk cap protrudes in a direction away from the second composite disk and passes through the inner hole of the first composite disk.

7. The brake disc according to claim 6, characterized in that The main disk body is in the shape of a ring, the first composite disk and the second composite disk are in the shape of a ring, and the inner diameters of the first composite disk and the second composite disk are greater than the outer diameter of the disk cap.

8. The brake disc according to claim 7, characterized in that It also includes a plurality of ribs, wherein the plurality of ribs are located between the first composite disk and the second composite disk, and are connected to at least one of the first composite disk and the second composite disk; The main plate body is provided with a plurality of slots, and the slots at least penetrate the surface of the main plate body facing the first composite plate; Along the axial direction of the brake disc, each rib is embedded in the opposite slot.

9. The brake disc according to claim 8, characterized in that The plurality of ribs are arranged at equal intervals along the circumferential direction of the brake disc, and the plurality of slots are arranged at equal intervals along the circumferential direction of the brake disc; and / or, The protruding heights of the plurality of ribs are the same, and the depths of the plurality of slots are the same.

10. The brake disc according to claim 8, characterized in that The ribs extend in a radial direction of the brake disc, and the slots extend in a radial direction of the brake disc.

11. The brake disc according to claim 8, characterized in that The ribs are in a rectangular parallelepiped shape, the length of the ribs is less than the sum of the inner and outer diameters of the main plate body, and the protruding height of the ribs is less than or equal to the thickness of the main plate body; The width of the rib is greater than or equal to 10 mm.

12. The brake disc according to claim 8, characterized in that The first composite disk, the second composite disk and the plurality of ribs are integrally formed.

13. The brake disc according to claim 1, characterized in that The first composite disk and the second composite disk are made of cast iron, and the main disk body is made of aluminum alloy, aluminum alloy ceramic or carbon fiber ceramic.

14. A braking device, characterized in that: A brake disc comprising a brake insert, a first friction plate, a second friction plate and any one of claims 1 to 13, wherein a surface of the first composite disc facing away from the second composite disc is a first friction surface, and a surface of the second composite disc facing away from the first composite disc is a second friction surface; The brake clamp can push the first friction plate and the second friction plate to move toward each other, so that the first friction plate can be pressed against the first friction surface, and the second friction plate can be pressed against the second friction surface, so as to achieve braking of the brake disc.

15. A vehicle, characterized in that: A brake disc comprising any one of claims 1-13.

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