Brake disc, brake and vehicle

Abstract

The utility model provides a brake disc, a brake and a vehicle, and belongs to the technical field of vehicle braking systems. The brake disc comprises a brake disc body and a ventilation assembly. The brake disc body comprises a friction part and a connecting part, the ventilation assembly comprises a plurality of ventilation pieces arranged on the friction part at intervals, the side, away from the friction part, of each ventilation piece is connected with the connecting part, and the axis of the connecting part coincides with the axis of the friction part; the connecting part is used for being connected with wheels of a vehicle, the connecting part and all the ventilation pieces are used for being located below calipers of a brake of the vehicle, the friction part is used for being located on the side of a friction plate of the calipers, and the connecting part is used for driving the friction part and all the ventilation pieces to rotate; the ventilation pieces are configured to push air to be blown to the calipers through the space between the ventilation pieces and the adjacent ventilation pieces when the ventilation pieces are driven by the connecting parts to rotate. According to the brake disc, the calipers can be cooled, the structure is simple, complex machining of the calipers is not needed, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle braking system, and particularly relates to a brake disc, a brake and a vehicle. BACKGROUND

[0002] As an important part of a vehicle, a braking system includes a disc brake and a drum brake. The disc brake realizes braking of the vehicle by cooperation of a brake disc and a friction plate on a caliper. In the braking process, heat generated by friction increases the temperature of the brake disc and the caliper, which affects the braking performance. Therefore, it is crucial to cool the brake disc and the caliper.

[0003] In the related art, a ventilation groove is formed on the brake disc. During braking, the brake disc rotates with the wheel, and air is thrown out of the ventilation groove to take away heat, thereby cooling the brake disc. An installation groove is formed on the top of the caliper. The caliper and the rim of the wheel are spaced apart in the radial direction to install a cooling air pipe. During braking, the cooling air pipe is used to introduce convection air to the caliper, and the caliper is cooled by heat convection.

[0004] However, the above-mentioned cooling method for the caliper has an impact on the structural strength and stability of the caliper, and has a small range of application. CONTENT OF THE UTILITY MODEL

[0005] The present application provides a brake disc, a brake and a vehicle to solve the problems in the related art.

[0006] In a first aspect, the present application provides a brake disc, comprising a brake disc body and a ventilation assembly; the brake disc body comprises a friction part and a connecting part, and the ventilation assembly comprises a plurality of ventilation pieces arranged at intervals on the friction part, each ventilation piece is connected to the connecting part on the side away from the friction part, and the axis of the connecting part coincides with the axis of the friction part; the connecting part is used to be connected to the wheel of a vehicle, the connecting part and each ventilation piece are used to be located below the caliper of the brake of the vehicle, the friction part is used to be located on the side of the friction plate of the caliper, and the connecting part is used to drive the friction part and each ventilation piece to rotate; the ventilation piece is configured to push air to blow to the caliper through the spacing between adjacent ventilation pieces when rotating under the driving of the connecting part.

[0007] In a possible implementation manner, the brake disc provided by the present application comprises a fixed segment and a friction segment sleeved on the fixed segment; each ventilation piece is arranged on the fixed segment, and each ventilation piece is arranged in a circumferential array around the axis of the fixed segment; and the axis of the fixed segment coincides with the axis of the friction segment.

[0008] In a possible implementation manner, the brake disc provided by the present application comprises a fixed segment, a friction segment and a connecting part, all of which are in the shape of a circular ring, and the radius of the connecting part, the radius of the fixed segment and the radius of the friction segment increase in turn.

[0009] In a possible implementation, the brake disc provided by the application further comprises a wind guide, the wind guide is provided with a relief area in which a connecting part is arranged, the connecting part is arranged on the side of each ventilation part away from the friction part, the connecting part is arranged on the relief area, and the connecting part and each ventilation part are connected with the wind guide; wherein the first projection of the wind guide towards the friction part covers the second projection of each ventilation part towards the friction part.

[0010] In a possible implementation, the brake disc provided by the application, the side of the ventilation part towards the friction segment has a first arc surface, and the arc center of the first arc surface and the friction segment are located on the same side of the first arc surface.

[0011] In a possible implementation, the brake disc provided by the application, the side of the ventilation part away from the friction part has a connecting surface and a second arc surface arranged in sequence, and the connecting part abuts against each connecting surface; the wind guide has a third arc surface matched with the second arc surface, and the third arc surface abuts against each second arc surface.

[0012] In a possible implementation, the brake disc provided by the application, the second arc surface and the friction part have a spacing therebetween, and the spacing increases in sequence along the direction of the second arc surface away from the connecting surface.

[0013] In a second aspect, the application provides a brake, comprising a brake body and a brake disc as any of the first aspect arranged on the brake body.

[0014] In a third aspect, the application provides a vehicle, comprising a vehicle body and a brake as the second aspect arranged on the vehicle body.

[0015] In a possible implementation, the vehicle provided by the application, the vehicle body comprises a wheel and a knuckle, the brake body comprises a caliper, the hub of the wheel and the knuckle are rotationally connected, the caliper is fixedly connected with the knuckle, and the connecting part of the brake disc of the brake is connected with the hub of the wheel.

[0016] The brake disc, the brake and the vehicle provided by the application, the brake disc is provided with a brake disc body and a ventilation assembly, the brake disc body comprises a friction part and a connecting part, the ventilation assembly comprises a plurality of ventilation pieces arranged on the friction part in intervals, the side of each ventilation piece away from the friction part is connected with the connecting part, and the axis of the connecting part coincides with the axis of the friction part, so that when the brake disc is used in cooperation with a caliper, the relative position between the friction part of the brake disc and the friction sheet of the caliper can be kept stable, so as to brake the vehicle. When the brake disc is assembled, the connecting part is used to be connected with the wheel of the vehicle, the connecting part and each ventilation piece are used to be located below the caliper of the brake of the vehicle, and the friction part is used to be located on the side of the friction sheet of the caliper. Thus, when the vehicle needs to brake and the caliper needs to be cooled, the connecting part connected with the wheel drives the friction part and each ventilation piece to rotate, and the ventilation piece is used to push air to blow to the caliper through the spacing between the ventilation piece and the adjacent ventilation piece during rotation, so as to cool the caliper. The brake disc provided by the application can cool the caliper and has simple structure, does not need to be complicatedly processed, and has wide application range. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0018] Figure 1 A structural schematic view of the brake disc provided by the embodiment of the application;

[0019] Figure 2 A structural schematic view from another angle; Figure 1 A structural schematic view from another angle;

[0020] Figure 3 A partial structural sectional view of the brake provided by the embodiment of the application;

[0021] Figure 4 A structural schematic view of the ventilation piece in the brake disc provided by the embodiment of the application.

[0022] Explanation of reference signs:

[0023] 100 - brake disc body;

[0024] 110 - friction part; 111 - fixed section; 112 - friction section; 120 - connecting part;

[0025] 200 - ventilation assembly;

[0026] 210 - ventilation piece; 211 - first arc-shaped surface; 212 - connecting surface; 213 - second arc-shaped surface;

[0027] 300 - air guide piece;

[0028] 310 - avoidance zone; 320 - third arcuate surface;

[0029] 400 - caliper; 410 - friction plate. DETAILED DESCRIPTION

[0030] For the purpose of clarity, technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the preferred embodiments of the present application. In the drawings, the same or similar notations represent the same or similar components or components having the same or similar functions throughout. The described embodiments are part of the present application, not all embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application. The embodiments of the present application will be described in detail below with reference to the drawings.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixedly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as limiting the present application.

[0033] The terms "first", "second", "third", "fourth" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0034] Moreover, the terms "comprising" and "including" and any variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, system, product or apparatus that comprises a list of steps or elements not merely consists solely of those steps or elements but can include additional steps or elements not expressly listed or inherent to such process, method, product or apparatus.

[0035] As mentioned in the background, in the related art, a ventilation slot is formed on the brake disc, and when braking, the brake disc rotates with the wheel, so that air is thrown out of the ventilation slot to take away heat, thereby achieving cooling of the brake disc; a mounting slot is formed on the top of the caliper, so that space is left between the caliper and the rim of the wheel in the radial direction to mount a cooling air pipe, and when braking, the cooling air pipe is used to introduce convection air to the caliper, and heat convection, i.e. air cooling, is used to cool the caliper.

[0036] However, when the caliper is cooled in the above manner, part of the structure of the caliper needs to be milled to form the mounting slot, so that the caliper loses a lot of material and does not meet the design requirements, thereby negatively affecting the rigidity and strength of the caliper; further, in order to ensure the rigidity and strength of the caliper, a relatively complex machining process needs to be used and high-strength materials, such as forged aluminum alloy, need to be used, thereby increasing the manufacturing cost and being unsuitable for mass production; the cooling air pipe fixed on the caliper can be loosened or damaged due to vibration of the vehicle and high-temperature environment, thereby affecting the reliability and safety of the braking system. Therefore, when the caliper is cooled in the above manner, the structural strength and stability of the caliper are affected, and the scope of application is small.

[0037] Therefore, the embodiments of the present application provide a brake disc, a brake and a vehicle. The brake disc is provided with a brake disc body and a ventilation assembly. The brake disc body includes a friction part and a connecting part. The ventilation assembly includes a plurality of ventilation pieces which are arranged at intervals on the friction part. The side of each ventilation piece away from the friction part is connected to the connecting part, and the axis of the connecting part coincides with the axis of the friction part. Thus, when the brake disc is used in cooperation with the caliper, the relative position between the friction part of the brake disc and the friction plate of the caliper can be kept stable, so as to brake the vehicle. When the brake disc is assembled, the connecting part is used to connect to the wheel of the vehicle, the connecting part and the ventilation pieces are used to be located below the caliper of the brake of the vehicle, and the friction part is used to be located at the side of the friction plate of the caliper. Thus, when the caliper needs to be cooled during braking of the vehicle, the connecting part connected to the wheel drives the friction part and the ventilation pieces to rotate, and the ventilation pieces are used to push air to the caliper through the spacing between adjacent ventilation pieces during rotation, so as to cool the caliper. The brake disc provided by the embodiments of the present application can cool the caliper, has a simple structure, does not need to be processed complicatedly, and has a wide range of application.

[0038] The application will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] Referring to Figures 1 to 3 The brake disc provided by the embodiment of the application includes a brake disc body 100 and a ventilation assembly 200. The brake disc body 100 includes a friction portion 110 and a connecting portion 120. The ventilation assembly 200 includes a plurality of ventilation pieces 210 which are arranged at intervals on the friction portion 110. Each ventilation piece 210 is connected to the connecting portion 120 on the side away from the friction portion 110. The axis of the connecting portion 120 coincides with the axis of the friction portion 110. The connecting portion 120 is used to be connected to the wheel of the vehicle. The connecting portion 120 and each ventilation piece 210 are used to be located below the caliper 400 of the brake of the vehicle. The friction portion 110 is used to be located on the side of the friction plate 410 of the caliper 400. The connecting portion 120 is used to drive the friction portion 110 and each ventilation piece 210 to rotate. The ventilation piece 210 is configured to push air to blow to the caliper 400 through the interval with the adjacent ventilation piece 210 when rotating under the driving of the connecting portion.

[0040] It should be noted that the connecting portion 120 of the embodiment of the application is used to be connected to the wheel of the vehicle, which means that the connecting portion 120 is connected to the hub of the vehicle to ensure that the brake disc rotates with the wheel. The wheel of the vehicle includes a tire, a hub and a rim. The tire is a rubber product installed on the outside of the wheel. The hub is a metal part at the center of the wheel, which is used to connect the wheel and the suspension system or axle of the vehicle. The rim is a metal ring-shaped part for installing the tire, which is usually integrally formed with the hub or connected through bolts.

[0041] It should also be noted that the caliper 400 in the embodiment of the application can refer to the structure in the prior art. According to different designs of the vehicle, the caliper 400 can be fixed on the steering knuckle of the vehicle or on the suspension system. Exemplarily, the caliper 400 can include a caliper body, a piston and a friction plate 410. The caliper body is a metal shell, which is usually made of cast iron or aluminum alloy, and is used to accommodate the piston and the friction plate 410. The piston is driven by a hydraulic system to push the friction plate 410 to the brake disc. The friction plate 410 is in contact with the rotating brake disc to generate a friction force, so as to slow down or stop the wheel.

[0042] Specifically, the friction portion 110 of the brake disc is used to be located on the side of the friction plate 410 of the caliper 400. The friction portion 110 is in contact with the friction plate 410 of the caliper 400 to achieve the braking of the vehicle. The friction plate 410 of the caliper 400 is provided with two friction plates 410, which are respectively arranged on the opposite sides of the caliper body, i.e. on the left side and the right side in the X direction as shown in the figure. The friction portion 110 is located between the two friction plates 410, i.e. the friction portion 110 is located on the right side of the left friction plate 410 and on the left side of the right friction plate 410. Figure 3 ​

[0043] It can be understood that heat is generated during the friction braking of the friction part 110 and the friction plate 410, and the heat is transmitted to the caliper body through the paths of heat conduction and heat convection. With the frequent high-speed braking of the vehicle in the conditions of fierce driving or mountain road, the heat will further rise. When the brake fluid of the hydraulic system in the caliper body reaches the boiling point, it will vaporize and affect the pressure transmission capability, so that the piston cannot accurately push the friction plate 410 to contact the friction part 110, and the braking performance is affected. The embodiment of the present application is characterized in that a plurality of ventilation pieces 210 are arranged on the friction part 110 at intervals, and the side of each ventilation piece 210 away from the friction part 110 is connected with the connecting part 120. After the connecting part 120 is connected with the wheel, the connecting part 120 and each ventilation piece 210 are located below the caliper 400.

[0044] In this way, when the vehicle needs to brake and the caliper 400 needs to be cooled, the connecting part 120 connected with the wheel drives the friction part 110 and each ventilation piece 210 to rotate. The ventilation piece 210 is used to push air to blow to the caliper 400 through the spacing between adjacent ventilation pieces 210 during rotation, so as to cool the caliper 400, thereby avoiding the vaporization of the brake fluid. Overall, the structure of the brake disc is simple, and the application range is wide.

[0045] That is, the embodiment of the present application cools the caliper 400 through the ventilation assembly 200 of the brake disc, so that complex processing is not needed on the caliper 400, the original structure of the caliper 400 is reserved, and the rigidity and strength of the caliper 400 are ensured.

[0046] The specific structure of the ventilation piece 210 and the arrangement mode of the ventilation piece 210 on the friction part 110 are not limited in the embodiment of the present application, as long as the following conditions are met: after the connecting part is connected with each ventilation piece 210, the axis of the connecting part coincides with the axis of the friction part 110; and when the ventilation piece 210 rotates with the wheel, the ventilation piece 210 can push air to blow to the caliper 400 from the spacing between adjacent ventilation pieces 210.

[0047] The axis of the connecting part 120 coincides with the axis of the friction part 110 to ensure that the relative position of the friction part 110 and the friction plate 410 of the caliper 400 remains stable when the brake disc is used in cooperation with the caliper 400. Further, the friction part 110 and the connecting part 120 can be both arranged in a disc shape. In this way, on the one hand, the balance and stability during rotation of the brake disc can be ensured; on the other hand, the contact surface of the friction plate 410 and the friction part 110 can be uniform, which is beneficial to provide stable braking force and avoid the problems of local overheating and uneven wear.

[0048] Reference Figure 1In a specific example, the friction part 110 includes a fixed segment 111 and a friction segment 112 sleeved on the fixed segment 111; each ventilation piece 210 is arranged on the fixed segment 111, and the ventilation pieces 210 are arranged in a circular array around the axis of the fixed segment 111; wherein the axis of the fixed segment 111 coincides with the axis of the friction segment 112.

[0049] As the installation basis of the ventilation pieces 210, it is ensured that the ventilation pieces 210 can be firmly connected to the brake disc; by sleeving the friction segment 112 on the fixed segment 111, the friction segment 112 is used to contact the friction plate 410 of the caliper 400 to realize the braking of the vehicle.

[0050] In a specific implementation, each ventilation piece 210 is arranged on the fixed segment 111, and the ventilation pieces 210 are arranged in a circular array around the axis of the fixed segment 111, so that in the rotation process of the brake disc, the air is pushed by the ventilation pieces 210, which can ensure that the air is more uniformly blown to the caliper 400, thereby improving the heat dissipation effect of the caliper 400.

[0051] By setting the axis of the fixed segment 111 to coincide with the axis of the friction segment 112, the vibration or imbalance of the brake disc during rotation can be avoided; in addition, it is beneficial to ensure uniform contact between the friction segment 112 and the friction plate 410, reduce local wear, and prolong the service life of the brake disc and the caliper 400.

[0052] Exemplarily, the fixed segment 111, the friction segment 112, and the connecting part 120 are all circular rings, and the radius of the connecting part 120, the radius of the fixed segment 111, and the radius of the friction segment 112 increase in turn.

[0053] In this way, on the basis of ensuring that the relative position between the friction part 110 of the brake disc and the friction plate 410 of the caliper 400 remains stable to provide stable braking force, by setting the fixed segment 111, the friction segment 112, and the connecting part 120 to be circular rings, the overall structural design of the brake disc is simplified, and complex processing techniques can be avoided; by designing the radius of the connecting part 120, the radius of the fixed segment 111, and the radius of the friction segment 112 to increase in turn, the overall structure of the brake disc is more compact, which is convenient for manufacturing and assembly and improves production efficiency.

[0054] Referring to Figures 1 to 3 In some embodiments, the brake disc further includes a wind guide 300, the wind guide 300 is provided with a avoiding area 310 avoiding the connecting part 120, the wind guide 300 is arranged on the side of each ventilation piece 210 away from the friction part 110, the connecting part 120 is arranged on the avoiding area 310, and the connecting part 120 and each ventilation piece 210 are connected with the wind guide 300; wherein the first projection of the wind guide 300 towards the friction part 110 covers the second projection of each ventilation piece 210 towards the friction part 110.

[0055] Wherein, by opening the avoiding area 310 avoiding the connecting part 120 on the air guide part 300, it is ensured that the connecting part 120 can smoothly pass through the air guide part 300 and be connected with the hub of the wheel.

[0056] In a specific implementation, the air guide part 300 is arranged on the side of each air vent part 210 away from the friction part 110, that is, the air guide part 300 and the connecting part 120 are located on the same side of the air vent part 210, and by setting the first projection of the air guide part 300 towards the friction part 110 to cover the second projection of each air vent part 210 towards the friction part 110, it is ensured that the air guide part 300 can cover each air vent part 210, forming an air guide channel guiding air to flow from the spacing between the air vent parts 210 to the caliper 400.

[0057] By connecting the connecting part 120 and each air vent part 210 with the air guide part 300, it is beneficial to improve the structural stability of the air guide part 300. For example, the air guide part 300 and the connecting part 120, and the air guide part 300 and the air vent part 210 can be fixed by welding. Of course, other connection methods can also be used as long as the connection reliability is ensured. The embodiments of the present application are not limited in this regard.

[0058] Referring to Figure 2 and Figure 4 In some examples, the side of the air vent part 210 towards the friction section 112 has a first arc surface 211, and the arc center of the first arc surface 211 and the friction section 112 are located on the same side of the first arc surface 211.

[0059] In this way, the arc design of the first arc surface 211 can guide air to flow more concentratedly and smoothly to the caliper 400, reduce the resistance when air flows, and enable air to more efficiently take away the heat of the caliper 400. In addition, the arc design is beneficial to reduce the turbulence when air flows, thereby reducing wind noise.

[0060] For example, the air vent part 210 has a sheet-like structure as a whole, which simplifies the structure of the air vent part 210 and facilitates processing.

[0061] Continuing to refer to Figure 3 and Figure 4 In a specific example, the side of the air vent part 210 away from the friction part 110 has a connecting surface 212 and a second arc surface 213 arranged in sequence, and the connecting part 120 abuts against each connecting surface 212. The air guide part 300 has a third arc surface 320 matched with the second arc surface 213, and the third arc surface 320 abuts against each second arc surface 213.

[0062] The connecting surface 212 is used to provide a stable contact surface for the connecting portion 120, so as to improve the connecting strength between the ventilation component 210 and the connecting portion 120, ensure that the connecting portion 120 is firmly fixed on the ventilation component 210, and avoid loosening or falling off of the connecting portion 120 and the ventilation component 210 during rotation. For example, the connecting surface 212 is a horizontal surface parallel to the friction portion 110. The connecting portion 120 is abutted with each connecting surface 212, so as to ensure that the axis of the connecting portion 120 coincides with the axis of the friction portion 110.

[0063] The second arc-shaped surface 213 is used to guide the smooth flow of air to the caliper 400 when the air flows from the gap between the ventilation components 210 to the caliper 400. In actual implementation, the third arc-shaped surface 320 matched with the second arc-shaped surface 213 is arranged on the air guide component 300, so as to ensure that the air guide component 300 and the ventilation component 210 can be closely attached, and a closed air guide channel is formed, so that the flow path of the air is more reasonable, and the heat dissipation efficiency of the caliper 400 is improved.

[0064] In some embodiments, the second arc-shaped surface 213 and the friction portion 110 have a gap therebetween, and the gap increases in sequence in the direction away from the connecting surface 212 of the second arc-shaped surface 213.

[0065] In this way, the flow path of the air is optimized. During rotation of the brake disc, the ventilation component 210 can push more sufficient air to the caliper 400, so as to improve the heat dissipation and cooling efficiency of the caliper 400.

[0066] The embodiment of the present application also provides a brake, which comprises a brake body and the brake disc in any of the above-mentioned embodiments arranged on the brake body.

[0067] The brake body can comprise the caliper 400, and the brake disc has the same structure and working principle as those in the above-mentioned embodiments, which will not be described herein.

[0068] The brake provided by the embodiment of the present application comprises the brake disc, the brake disc body 100 and the ventilation assembly 200. The brake disc body 100 comprises the friction portion 110 and the connecting portion 120. The ventilation assembly 200 comprises a plurality of ventilation components 210 arranged at intervals on the friction portion 110. The side, away from the friction portion 110, of each ventilation component 210 is connected with the connecting portion 120, so that the axis of the connecting portion 120 coincides with the axis of the friction portion 110. Therefore, when the brake disc is used in cooperation with the caliper 400, the relative position between the friction portion 110 of the brake disc and the friction sheet 410 of the caliper 400 can be kept stable, so as to brake the vehicle.

[0069] In the assembly of the brake disc, the connecting portion 120 is used for being connected with the wheel of the vehicle, the connecting portion 120 and each ventilating piece 210 are used for being located below the caliper 400, and the friction portion 110 is used for being located at the side of the friction plate 410 of the caliper 400, so that, when the vehicle needs to brake and the caliper 400 needs to be cooled, the connecting portion 120 connected with the wheel drives the friction portion 110 and each ventilating piece 210 to rotate, and the ventilating piece 210 is used for pushing air to blow to the caliper 400 through the interval between the ventilating piece 210 and the adjacent ventilating piece 210 to cool the caliper 400, so that the caliper 400 can be cooled by the brake disc, and the structure is simple and the application range is wide.

[0070] The embodiment of the application further provides a vehicle, comprising a vehicle body and a brake as described above arranged on the vehicle body.

[0071] The overall structure and working principle of the brake are the same as those in the foregoing embodiment, and details are not repeated here.

[0072] Specifically, the vehicle body comprises a wheel and a knuckle, the brake body comprises the caliper 400, the hub of the wheel is rotationally connected with the knuckle, the caliper 400 is fixedly connected with the knuckle, and the connecting portion 120 of the brake disc is connected with the hub of the wheel.

[0073] The vehicle provided by the embodiment of the application is provided with the brake disc, the brake disc is provided with the brake disc body 100 and the ventilating assembly 200, the brake disc body 100 comprises the friction portion 110 and the connecting portion 120, the ventilating assembly 200 comprises a plurality of ventilating pieces 210 which are arranged at intervals on the friction portion 110, the side, away from the friction portion 110, of each ventilating piece 210 is connected with the connecting portion 120, and the axis of the connecting portion 120 coincides with the axis of the friction portion 110, so that, when the brake disc is used in cooperation with the caliper 400, the relative position between the friction portion 110 of the brake disc and the friction plate 410 of the caliper 400 can be kept stable, so as to brake the vehicle.

[0074] Referring to Figure 3 After the brake is assembled on the vehicle body, the connecting portion 120 and each ventilating piece 210 are used for being located below the caliper 400, and the friction portion 110 is used for being located at the side of the friction plate 410 of the caliper 400, so that, when the vehicle needs to brake and the caliper 400 needs to be cooled, the connecting portion 120 connected with the hub of the wheel drives the friction portion 110 and each ventilating piece 210 to rotate, and the ventilating piece 210 is used for pushing air to blow to the caliper 400 through the interval between the ventilating piece 210 and the adjacent ventilating piece 210 to cool the caliper 400, so that the caliper 400 can be cooled by the brake disc, and the structure is simple and the application range is wide.

[0075] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A brake disc, characterized in that The brake disc body (100) comprises a friction part (110) and a connecting part (120), The ventilation assembly (200) comprises a plurality of ventilation pieces (210) arranged at intervals on the friction part (110), and each ventilation piece (210) is connected with the connecting part (120) on the side away from the friction part (110), and the axis of the connecting part (120) coincides with the axis of the friction part (110); The connecting part (120) is used to connect with the wheel of the vehicle, the connecting part (120) and each ventilation piece (210) are used to be located below the caliper (400) of the brake of the vehicle, the friction part (110) is used to be located on the side of the friction plate (410) of the caliper (400), and the connecting part (120) is used to drive the friction part (110) and each ventilation piece (210) to rotate; When the ventilation piece (210) rotates under the driving of the connecting part (120), air is pushed to blow to the caliper (400) through the spacing between adjacent ventilation pieces (210). The friction part (110) comprises a fixed segment (111) and a friction segment (112) sleeved on the fixed segment (111); 2. The brake disc of claim 1, wherein Each ventilation piece (210) is arranged on the fixed segment (111), and each ventilation piece (210) is arranged in a circular array around the axis of the fixed segment (111); wherein the axis of the fixed segment (111) coincides with the axis of the friction segment (112). The fixed segment (111), the friction segment (112) and the connecting part (120) are all circular rings, and the radius of the connecting part (120), the radius of the fixed segment (111) and the radius of the friction segment (112) increase in turn.

3. The brake disc of claim 2, wherein, Further comprising a wind guide piece (300), the wind guide piece (300) is provided with a avoiding area (310) avoiding the connecting part (120), the wind guide piece (300) covers the side of each ventilation piece (210) away from the friction part (110), the connecting part (120) is arranged on the avoiding area (310), and the connecting part (120) and each ventilation piece (210) are connected with the wind guide piece (300); 4. The brake disc of claim 3, wherein Wherein, the first projection of the wind guide piece (300) towards the friction part (110) covers the second projection of each ventilation piece (210) towards the friction part (110). The side of the ventilation piece (210) towards the friction segment (112) has a first arc surface (211), and the arc center of the first arc surface (211) and the friction segment (112) are located on the same side of the first arc surface (211).

5. Brake disc according to any one of claims 2 to 4, characterized in that The side of the ventilation piece (210) away from the friction part (110) has a connecting surface (212) and a second arc surface (213) arranged in turn, and the connecting part (120) abuts against each connecting surface (212); 6. The brake disc of claim 4, wherein, ​ The air guide (300) has a third arc surface (320) matched with the second arc surface (213), and the third arc surface (320) abuts against each second arc surface (213).

7. The brake disc of claim 6, wherein The second arc surface (213) has a spacing with the friction part (110), and the spacing increases in sequence along the direction in which the second arc surface (213) deviates from the connecting surface (212).

8. A brake characterized by The brake disc comprises a brake body and the brake disc as claimed in any one of claims 1 to 7 arranged on the brake body.

9. A vehicle characterized by comprising: The brake comprises a vehicle body and the brake as claimed in claim 8 arranged on the vehicle body.

10. The vehicle of claim 9, wherein, The vehicle body comprises a wheel and a knuckle, and the brake body comprises a caliper (400); The hub of the wheel and the knuckle are rotationally connected, the caliper (400) is fixedly connected with the knuckle, and the connecting part (120) of the brake disc of the brake is connected with the hub of the wheel.

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