Brake disc and vehicle

Abstract

The utility model discloses a kind of brake disc and vehicle, brake disc includes: brake disc body, brake disc body has two mutually opposite brake faces, at least part of two brake faces is adapted to cooperate with brake caliper braking, brake face is provided with ventilation groove, ventilation groove is at least partially extended in circumferential direction and is multiple, multiple ventilation grooves are coaxially arranged and sequentially spaced distribution in the radial direction of brake disc body. Thus, by being provided with ventilation groove in brake face, ventilation groove is at least partially extended in circumferential direction and is multiple, multiple ventilation grooves are coaxially arranged and sequentially spaced distribution in the radial direction of brake disc body, so not only can the heat dissipation effect of brake disc be improved, the uniformity of guaranteeing heat dissipation, but also the lightweight degree of brake disc can be improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a brake disc and a vehicle. Background Technology

[0002] A brake disc is a component used to slow down or brake a moving vehicle to avoid danger. Specifically, braking force is generated by controlling the brake caliper to clamp the brake disc. On the one hand, this places higher demands on the structural strength and lightweight design of the brake disc; on the other hand, during braking, significant friction is often generated between the brake disc and the brake caliper, producing frictional heat, which also places higher demands on the brake disc's heat dissipation performance.

[0003] In related technologies, the structural design of brake discs is not reasonable enough. Although ventilation channels are set inside to improve heat dissipation, the heat dissipation effect is still poor and cannot meet the needs of actual use, resulting in a low user experience. Utility Model Content

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a brake disc with better heat dissipation efficiency and greater weight reduction.

[0005] Another objective of this invention is to provide a vehicle.

[0006] According to an embodiment of the present invention, a brake disc includes: a brake disc body having two opposing brake surfaces, at least a portion of the two brake surfaces being adapted to engage with a brake caliper, the brake surfaces being provided with ventilation grooves, the ventilation grooves being at least partially extending in the circumferential direction and being multiple in number, the multiple ventilation grooves being coaxially arranged and sequentially spaced apart in the radial direction of the brake disc body.

[0007] Therefore, by providing ventilation grooves on the brake surface, with the ventilation grooves extending at least partially in the circumferential direction and being multiple in number, and the multiple ventilation grooves being coaxially arranged and sequentially spaced in the radial direction of the brake disc body, not only can the heat dissipation effect of the brake disc be improved and the heat dissipation uniformity be ensured, but the weight of the brake disc can also be improved.

[0008] In some examples of this invention, the depth of the plurality of ventilation grooves gradually decreases in the axial direction in the radially outward direction.

[0009] In some examples of this invention, the width of the plurality of ventilation grooves gradually decreases in the radial direction outward.

[0010] In some examples of this invention, the ventilated groove is projected in an annular shape along the axial direction.

[0011] In some examples of this utility model, the plane in which the axial direction and the radial direction coexist is defined as the first plane, and the cross-section of the ventilation groove on the first plane is arc-shaped; or the cross-section of the ventilation groove on the first plane is rectangular.

[0012] In some examples of this utility model, the brake disc body includes: a first brake disc and a second brake disc, the first brake disc and the second brake disc are coaxially arranged and spaced apart in the axial direction, the surfaces of the first brake disc and the second brake disc that are opposite to each other are brake surfaces, a plurality of fins are connected between the first brake disc and the second brake disc, the plurality of fins are spaced apart in the circumferential direction, and a ventilation channel is formed between two adjacent fins.

[0013] In some examples of this invention, the fins are arranged to extend radially.

[0014] In some examples of this utility model, the brake disc body includes: a friction part and a mounting part connected to each other, the friction part being adapted to engage with the brake caliper, the mounting part being adapted to connect with the wheel hub, the friction part being made of high-carbon cast iron, and the mounting part being made of titanium alloy.

[0015] In some examples of this invention, the friction part and the mounting part are laser welded.

[0016] The vehicle according to an embodiment of the present invention includes: the brake disc described above.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of a brake disc according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the brake disc from another perspective according to an embodiment of the present utility model;

[0021] Figure 3 This is a cross-sectional view of the brake disc according to an embodiment of the present utility model.

[0022] Figure label:

[0023] 100. Brake disc;

[0024] 10. Brake disc body; 101. Brake surface; 102. Ventilation groove;

[0025] 11. First brake disc; 12. Second brake disc; 13. Fin; 14. Ventilation duct;

[0026] 15. Friction part; 16. Mounting part. Detailed Implementation

[0027] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0028] The following is for reference. Figures 1-3 The present invention describes a brake disc 100 according to an embodiment of the present invention, which can be applied to a vehicle.

[0029] Combination Figure 1 and Figure 2 As shown, the brake disc 100 according to this utility model mainly includes: a brake disc body 10. The brake disc body 10 has two mutually opposing brake surfaces 101, at least a portion of which is adapted to engage with a brake caliper. Each brake surface 101 is provided with a ventilation groove 102, which extends at least partially in the circumferential direction and is multiple in number. The multiple ventilation grooves 102 are coaxially arranged and sequentially spaced apart in the radial direction of the brake disc body 10.

[0030] Specifically, the brake disc 100 is fixedly connected to the wheel hub, so that the brake disc 100 can rotate synchronously with the wheel hub and even the wheel. By fixing the brake caliper to the vehicle body, the brake caliper is located on the circumferential outer side of the brake disc 100, so that the brake caliper can be fixedly set relative to the brake disc 100.

[0031] When the user needs to brake, the brake caliper can be controlled to clamp the brake disc 100 via a hydraulic or pneumatic system. The friction between the brake caliper and the two brake surfaces 101 is converted into braking torque, which acts on the rotating brake disc 100. The direction of the friction is opposite to the direction of wheel rotation, causing the wheel to decelerate or even stop completely, thus achieving braking. When the user no longer needs to brake, the brake caliper can be controlled to release the brake disc 100, allowing the wheel to rotate normally.

[0032] Considering that during the braking process, the brake caliper and the two brake surfaces 101 are in frictional contact, which will generate heat, if the heat cannot be dissipated in time, it will lead to thermal decay of the brake disc 100 and reduce braking performance.

[0033] By providing a ventilation groove 102 on the brake surface 101, and extending the ventilation groove 102 at least partially in the circumferential direction, the extension direction of the ventilation groove 102 can be the same as the rotation direction of the brake disc 100. When the brake disc 100 rotates, outside air can be introduced into the ventilation groove 102. The ventilation groove 102 can form an airflow guiding channel, thereby accelerating heat convection, achieving heat dissipation of the brake disc 100, and improving the heat dissipation performance of the brake disc 100.

[0034] Furthermore, multiple ventilation grooves 102 can be configured, with multiple ventilation grooves 102 arranged coaxially and distributed sequentially at intervals in the radial direction of the brake disc body 10. In this way, the brake disc 100 can be cooled in the radial direction by multiple ventilation grooves 102, which can improve the uniformity of heat dissipation and enhance the temperature uniformity of the brake disc 100 in the radial direction. This can further improve the heat dissipation effect of the brake disc 100, avoid heat fade of the brake disc 100, and improve the heat dissipation performance of the brake disc 100.

[0035] In addition, the multiple ventilation grooves 102 can also reduce weight and improve the lightweight nature of the brake disc 100.

[0036] Therefore, by providing ventilation grooves 102 on the brake surface 101, the ventilation grooves 102 are at least partially extended in the circumferential direction and there are multiple ventilation grooves 102. The multiple ventilation grooves 102 are coaxially arranged and distributed in sequence at intervals in the radial direction of the brake disc body 10. This not only improves the heat dissipation effect of the brake disc 100 and ensures the uniformity of heat dissipation, but also improves the lightweighting of the brake disc 100.

[0037] Combination Figure 1 and Figure 2 As shown, in the radially outward direction, the depth of the multiple ventilation grooves 102 gradually decreases in the axial direction.

[0038] Specifically, the ventilation groove 102 is formed on the brake surface 101 and extends in the circumferential direction. That is, the extension direction of the ventilation groove 102 is parallel to the rotation direction of the brake disc 100, and the axial depth of the ventilation groove 102 affects the friction coefficient of the brake surface 101.

[0039] Furthermore, in the radial direction, the brake caliper engages with the portion of the brake disc 100 near the outer ring. By gradually decreasing the axial depth of the multiple ventilation grooves 102 in the radially outward direction, on the one hand, a larger ventilation area is ensured for the portion of the brake disc 100 near the inner ring, guaranteeing effective heat dissipation for the brake disc 100. On the other hand, the influence of the ventilation grooves 102 near the outer ring of the brake disc 100 on the coefficient of friction is reduced, avoiding an increase in the coefficient of friction and overheating. Thus, while improving the heat dissipation effect on the brake disc 100, the braking performance of the brake disc 100 can be guaranteed.

[0040] Combination Figure 1 and Figure 2 As shown, in the radially outward direction, the width of the plurality of ventilation grooves 102 gradually decreases in the radial direction.

[0041] Specifically, the ventilation groove 102 is formed on the brake surface 101 and extends in the circumferential direction. That is, the extension direction of the ventilation groove 102 is parallel to the rotation direction of the brake disc 100. The radial width of the ventilation groove 102 will affect the actual braking contact area between the brake surface 101 and the brake caliper, and will reduce the friction coefficient of the brake surface 101.

[0042] Furthermore, in the radial direction, the brake caliper engages with the portion of the brake disc 100 near the outer ring. By gradually decreasing the width of the multiple ventilation grooves 102 in the radially outward direction, on the one hand, a larger ventilation area is ensured for the portion of the brake disc 100 near the inner ring, guaranteeing effective heat dissipation for the brake disc 100. On the other hand, the impact of the ventilation grooves 102 near the outer ring of the brake disc 100 on the braking surface area 101 is reduced, avoiding a decrease in the coefficient of friction and preventing the ventilation grooves 102 from affecting the braking engagement between the brake caliper and the brake disc 100. Thus, while improving the heat dissipation effect of the brake disc 100, the braking performance of the brake disc 100 can be guaranteed.

[0043] In this way, a stepped groove structure can be formed on the brake surface 101, which can improve the heat dissipation capacity of the brake disc 100 while ensuring the friction between the brake disc 100 and the brake surface 101, thus ensuring the braking performance of the brake disc 100.

[0044] Combination Figure 1As shown, the axial projection of the ventilation groove 102 is annular. That is, the ventilation groove 102 is a circumferentially extending closed annular structure, which makes the circumferential distribution of the ventilation groove 102 more uniform. On the one hand, this makes the overall structure of the brake disc 100 more uniformly distributed in the circumferential direction, which not only ensures the structural strength of the brake disc 100, but also avoids brake vibration. On the other hand, this forms an annular airflow guiding channel, which further improves heat dissipation and ensures heat dissipation uniformity.

[0045] In some embodiments of this utility model, combined with Figure 2 As shown, the plane containing both axial and radial directions is defined as the first plane, and the cross-section of the ventilation groove 102 on the first plane is arc-shaped. This avoids sharp structures inside the ventilation groove 102 and prevents complex disturbances in the gas flow within the ventilation groove 102, thereby ensuring airflow stability. This not only ensures effective heat dissipation for the brake disc 100 but also prevents vibration and abnormal noise in the disc, thus improving the braking performance of the brake disc 100.

[0046] In some other embodiments of this utility model, a plane with both axial and radial directions is defined as a first plane, and the cross-section of the ventilation groove 102 on the first plane is rectangular. This allows for a further increase in the cross-sectional area of ​​the ventilation groove 102 on the first plane, given that both the axial depth and radial width of the ventilation groove 102 are fixed. This increases the ventilation area of ​​the ventilation groove 102, improves the ventilation volume, and consequently enhances the heat dissipation effect on the brake disc 100, thereby improving the heat dissipation performance of the brake disc 100.

[0047] Combination Figures 1-3 As shown, the brake disc body 10 may include: a first brake disc 11 and a second brake disc 12. The first brake disc 11 and the second brake disc 12 are coaxially arranged and spaced apart in the axial direction. The surfaces of the first brake disc 11 and the second brake disc 12 that are opposite to each other are brake surfaces 101. A plurality of fins 13 are connected between the first brake disc 11 and the second brake disc 12. The plurality of fins 13 are spaced apart in the circumferential direction. A ventilation channel 14 is formed between two adjacent fins 13.

[0048] Specifically, during vehicle operation, the brake disc 100 rotates, creating a relatively low-pressure zone in the area near the inner ring of the brake disc 100. By forming a ventilation channel 14 between two adjacent fins 13, once air enters the low-pressure zone, the centrifugal force generated by the high-speed rotating brake disc 100 immediately acts on these air molecules. The centrifugal force throws the air radially outward, flowing at high speed from the inner ring to the outer ring along the ventilation channel 14. That is, an airflow from the inner ring to the outer ring can be formed along the ventilation channel 14, carrying away a large amount of heat generated by the brake surface 101, thereby further improving the heat dissipation effect of the brake disc 100 and preventing the brake disc 100 from fading.

[0049] Enter a place, combine Figure 3 As shown, the fins 13 extend radially. Thus, the cross-sectional area of ​​the ventilation channel 14 gradually increases in the radially outward direction. Understandably, due to the Venturi effect, when gas flows through the ventilation channel 14, the gas velocity is higher and the pressure is lower near the inner ring, while the gas velocity is lower and the pressure is higher near the outer ring. This further increases the pressure difference between the inner and outer rings of the brake disc 100, ensuring a relatively low-pressure zone near the inner ring of the brake disc 100, further enhancing the extraction efficiency and improving the heat dissipation effect on the brake disc 100.

[0050] Combination Figure 1 As shown, the brake disc body 10 may include a friction part 15 and a mounting part 16 connected to each other. The friction part 15 is adapted to engage with the brake caliper, and the mounting part 16 is adapted to connect with the wheel hub. The friction part 15 is made of high-carbon cast iron, and the mounting part 16 is made of titanium alloy.

[0051] Specifically, it is understandable that the friction part 15 needs to withstand the repeated friction and wear of the brake caliper. By making the material of the friction part 15 high-carbon cast iron, sufficient structural strength and wear resistance can be ensured, effectively extending the service life of the brake disc 100 and reducing the replacement frequency. Furthermore, since high-carbon cast iron has a better specific heat capacity, by making the material of the friction part 15 high-carbon cast iron, the friction part 15 can absorb and store a large amount of heat energy generated during braking, delaying the rapid rise in temperature and mitigating heat fade.

[0052] Furthermore, by using titanium alloy for the mounting part 16, the thermal conductivity and heat resistance of the mounting part 16 can be improved while ensuring its structural strength. This not only allows for timely dissipation of braking heat but also effectively prevents heat fade, expanding its application scenarios and thus enhancing the reliability and durability of the mounting part 16 and even the brake disc 100 as a whole. Moreover, due to the low density of titanium alloy, the overall weight reduction of the mounting part 16 and even the brake disc 100 can be improved.

[0053] Thus, by setting the brake disc body 10 as a titanium alloy-cast iron composite structure, the lightweight design of the brake disc 100 can be improved, and the braking performance of the brake disc 100 can be enhanced.

[0054] Furthermore, the friction part 15 and the mounting part 16 are laser-welded. Specifically, since the friction part 15 and the mounting part 16 are made of different materials, by using laser welding to connect the friction part 15 and the mounting part 16, it is not only easier to achieve the connection between the friction part 15 and the mounting part 16 and reduce the connection difficulty, but also to ensure the connection accuracy and connection strength between the friction part 15 and the mounting part 16, thereby improving the structural reliability of the brake disc 100.

[0055] The vehicle according to this utility model mainly includes the aforementioned brake disc 100. Specifically, the brake disc 100 of this application, without sacrificing braking performance, not only has better heat dissipation performance but is also lighter in weight. By applying the brake disc 100 to a vehicle, not only can the vehicle's driving performance be improved, but the vehicle's lightweighting can also be enhanced, thereby improving the vehicle's product competitiveness and enhancing the user experience.

[0056] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0058] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A brake disc, characterized in that include: The brake disc body has two opposing brake surfaces, at least a portion of which is adapted to engage with a brake caliper. The brake surfaces are provided with ventilation grooves, which extend at least partially in the circumferential direction and are multiple in number. The multiple ventilation grooves are coaxially arranged and distributed sequentially at intervals in the radial direction of the brake disc body.

2. The brake disc of claim 1, wherein In the radially outward direction, the depth of the plurality of ventilation grooves gradually decreases in the axial direction.

3. The brake disc of claim 1, wherein, In the radially outward direction, the width of the plurality of ventilation grooves gradually decreases in the radial direction.

4. The brake disc of claim 1, wherein, The ventilated groove is circular in shape when projected axially.

5. The brake disc of claim 4, wherein, Define the plane containing both the axial and radial directions as the first plane, and the cross-section of the ventilation groove on the first plane is arc-shaped; or The cross-section of the ventilation groove on the first plane is rectangular.

6. The brake disc of claim 1, wherein, The brake disc body includes: a first brake disc and a second brake disc, the first brake disc and the second brake disc are coaxially arranged and spaced apart in the axial direction, the surfaces of the first brake disc and the second brake disc that are opposite to each other are brake surfaces, a plurality of fins are connected between the first brake disc and the second brake disc, the plurality of fins are spaced apart in the circumferential direction, and a ventilation channel is formed between two adjacent fins.

7. The brake disc of claim 6, wherein, The fins are arranged to extend radially.

8. The brake disc of claim 1, wherein, The brake disc body includes a friction part and a mounting part connected to each other. The friction part is adapted to engage with the brake caliper, and the mounting part is adapted to connect with the wheel hub. The friction part is made of high-carbon cast iron, and the mounting part is made of titanium alloy.

9. The brake disc of claim 8, wherein, The friction part and the mounting part are laser welded.

10. A vehicle characterized by comprising: include: The brake disc according to any one of claims 1-9.

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