Brake disc, assembly and vehicle

Abstract

The application relates to a brake disc, an assembly and a vehicle. The brake disc comprises a braking area and a connecting area, the connecting area is arranged close to a central hole of a disc body of the brake disc, and the braking area is arranged close to a periphery of the disc body of the brake disc; wherein the disc body of the brake disc is in a solid structure, the diameter of the disc body is in a first range value, and the thickness of the disc body is in a second range value. According to the scheme, the diameter and the thickness of the brake disc are smaller, and the brake disc has good braking performance.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to brake discs, components, and vehicles. Background Technology

[0002] The brake disc is the core rotating component in a car's braking system that works in conjunction with the brake caliper. It converts the vehicle's kinetic energy into heat energy through friction, thereby achieving deceleration or stopping.

[0003] In related technologies, brake discs typically have a large diameter and thickness, and are designed with complex ventilation groove structures. This design presents several problems in practical applications: First, in terms of performance, the large size of the brake disc puts significant pressure on the wheel end space, making it difficult to balance vehicle dynamics and braking performance; second, in terms of manufacturing, the large size and complex structure lead to high raw material consumption and complex processing techniques, significantly increasing manufacturing costs and making it difficult to meet the cost requirements of the passenger car market.

[0004] Therefore, there is an urgent need to develop a brake disc with smaller diameter and thickness while maintaining good braking performance. Utility Model Content

[0005] To address or partially address the problems existing in the related technologies, this application provides a brake disc, component, and vehicle, wherein the brake disc has a smaller diameter and thickness, while having good braking performance.

[0006] The first aspect of this application provides a brake disc, comprising:

[0007] The disc body includes a braking area and a connecting area, wherein the connecting area is located near the center hole of the disc body, and the braking area is located near the periphery of the disc body.

[0008] The brake disc has a solid structure, its diameter is within a first range, and its thickness is within a second range.

[0009] In one embodiment, the braking area has a plurality of ventilation holes distributed along the circumference of the disc body, the plurality of ventilation holes are axially connected along the disc body, and the disc body has no radial ventilation structure inside.

[0010] In one embodiment, the first range is 280mm to 400mm; and / or, the second range is 12mm to 30mm.

[0011] In one embodiment, the diameter of the ventilation hole is 2~6mm;

[0012] The proportion of the ventilation holes in the braking area is less than 5%.

[0013] In one embodiment, the disc surface is provided with a coating, the coating at least covering the friction surface of the braking area.

[0014] In one embodiment, the disk body is made of carbon fiber reinforced silicon carbide ceramic matrix composite material.

[0015] In one embodiment, the disc body is formed from a carbon fiber preform, the carbon fiber preform containing a reinforcing structure formed by interlacing long fibers and / or short fibers.

[0016] A second aspect of this application provides a braking assembly, comprising:

[0017] The brake disc as described in the first aspect above; and

[0018] A connector is provided, wherein the brake disc is coaxially arranged with the connector and is fixedly connected by fasteners; the connector is used to connect to the wheel hub.

[0019] In one embodiment, the connection structure includes a mortise;

[0020] The connector is rigidly connected to the connection area of ​​the disk body through a ring array of fasteners, and the connection interface is perpendicular to the rotation axis of the disk body.

[0021] A third aspect of this application provides a vehicle,

[0022] The vehicle is equipped with the braking components described in the second aspect above.

[0023] The technical solution provided in this application may include the following beneficial effects:

[0024] The solution provided in this application includes a brake disc with a braking area and a connecting area. The connecting area is located near the center hole of the disc, and the braking area is located near the periphery of the disc. The disc is a solid structure, with its diameter falling within a first range and its thickness within a second range. Therefore, the brake disc of this application significantly reduces its diameter and thickness while maintaining braking performance, and simultaneously simplifies the manufacturing process and shortens the production cycle.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0026] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0027] Figure 1 This is a schematic diagram of the brake disc structure shown in the embodiments of this application;

[0028] Figure 2 This is a side view of the brake disc shown in an embodiment of this application;

[0029] Figure 3 This is a front view of the braking assembly shown in an embodiment of this application;

[0030] Figure 4 This is a perspective view of the braking assembly shown in an embodiment of this application.

[0031] Reference numerals: 100, brake disc; 110, disc body; 101, center hole; 111, connecting area; 112, braking area; 1121, ventilation hole; 200, mortise; 300, fastener. Detailed Implementation

[0032] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0033] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0034] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0035] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0036] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In related technologies, brake discs typically have a large diameter and thickness, and are designed with complex ventilation groove structures. This design presents several problems in practical applications: First, in terms of performance, the large size of the brake disc puts significant pressure on the wheel end space, making it difficult to balance vehicle dynamics and braking performance; second, in terms of manufacturing, the large size and complex structure lead to high raw material consumption and complex processing techniques, significantly increasing manufacturing costs and making it difficult to meet the cost requirements of the passenger vehicle market. To address these problems, this application provides a brake disc, component, and vehicle with a smaller diameter and thickness while maintaining good braking performance.

[0038] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0039] Figure 1 This is a schematic diagram of the brake disc structure shown in the embodiments of this application; Figure 2 This is a side view of the brake disc shown in an embodiment of this application.

[0040] See Figure 1 and Figure 2 This application provides a brake disc 100, including a braking region 112 and a connecting region 111. The connecting region 111 is disposed near the center hole 101 of the disc body 110 of the brake disc 100, and the braking region 112 is disposed near the periphery of the disc body 110 of the brake disc 100. The disc body 110 of the brake disc 100 is a solid structure, the diameter D of the disc body 110 is within a first range value, and the thickness T of the disc body 110 is within a second range value.

[0041] In this embodiment, the solid structure refers to a dense structure in which the disc body 110 of the brake disc 100 has no internal cavity. This structure avoids the radial ventilation groove or hole design of the brake disc in related technologies, thereby effectively reducing the overall thickness of the disc body 110. The braking area 112 refers to the area where the periphery of the disc body 110 contacts the friction pad. This area cooperates with the brake caliper and undertakes the main function of braking energy conversion. The connecting area 111 refers to the connection interface between the central area of ​​the disc body 110 and the wheel hub. This structure is used to reliably connect the brake disc and the wheel hub through the connector 200. The center hole 101 refers to the mounting through hole in the center of the disc body 110, which realizes the accurate positioning of the brake disc on the wheel hub.

[0042] Through the technical solutions of the above embodiments, the brake disc of this application significantly reduces the diameter and thickness of the brake disc while ensuring braking performance, and at the same time simplifies the processing flow and shortens the production cycle.

[0043] In some embodiments, the first range value refers to the maximum extension distance of the disc 110 in the radial direction. The lower limit of the diameter range is set based on the minimum requirements to ensure braking contact area and heat capacity, while the upper limit takes into account the vehicle wheel end mounting space limitations and weight reduction goals. Specifically, in this embodiment, the diameter of the disc 110 is limited to between 280mm and 400mm. By setting this size range, the problem of wheel hub space encroachment caused by excessively large diameters in related technologies can be avoided while maintaining necessary braking performance.

[0044] In some embodiments, the second range value can be 12mm to 30mm. The lower limit of this range ensures that the brake disc has sufficient resistance to deformation to withstand braking pressure, while the upper limit avoids increased weight due to excessive material accumulation. Through the technical solutions of the above embodiments, this application solves the problems of excessive weight and high cost caused by excessive thickness of traditional brake discs, and further significantly reduces raw material consumption while ensuring braking performance.

[0045] In some embodiments, the braking area 112 has a plurality of evenly distributed ventilation holes 1121 distributed along the circumference of the disc body 110. The plurality of ventilation holes 1121 are axially connected along the disc body 110. The ventilation holes 1121 can be hole structures that penetrate the axial direction (or thickness direction) of the disc body 110. Specifically, they can be circular, elliptical or irregularly shaped holes. By axially connecting, a straight airflow channel is formed, so that the heat generated during braking can be quickly dissipated through air convection.

[0046] It is worth noting that the brake disc of this application does not have radial ventilation holes or ventilation grooves, that is, the disc body 110 does not have a radially extending ventilation structure inside, and the outer periphery of the disc body is smooth, which avoids the problems of increased processing steps and reduced material strength caused by setting radial ventilation structures in traditional brake discs.

[0047] Through the technical solutions of the above embodiments, the brake disc of this application can effectively reduce the thickness while ensuring strength. At the same time, it solves the problems of high cost, heavy weight and low processing efficiency caused by complex ventilation structure of traditional brake disc. Efficient heat dissipation is achieved through axial through holes, avoiding the negative impact of radial ventilation structure on material strength and processing technology.

[0048] In some embodiments, the surface of the disc 110 is provided with a coating that at least covers the friction surface of the braking area 112. The coating refers to a material layer applied to the surface of the disc 110, which improves the wear resistance and high-temperature resistance of the friction surface, reducing material performance degradation caused by high temperatures during braking. The friction surface refers to the area on the disc 110 that contacts the brake disc 100 and generates friction. Covering this area with the coating effectively reduces friction loss and maintains braking stability, preventing performance degradation due to localized overheating or uneven wear.

[0049] Through the technical solutions of the above embodiments, this application effectively solves the contradiction between high-temperature wear of the brake surface and compact size, so that the disc body 110 can still ensure braking performance while being thinner and smaller, and reduces the maintenance cost caused by frequent replacement of the brake disc 100.

[0050] In some embodiments, the disc 110 is made of carbon fiber reinforced silicon carbide ceramic matrix composite (C / SiC). This composite material is formed by combining a carbon fiber preform with a ceramic matrix. It possesses high hardness, high temperature resistance, and low density, enabling the brake disc 100 to maintain strength while reducing overall weight. During braking, the carbon ceramic material can withstand the heat load generated by high-temperature friction, preventing a decrease in braking force due to thermal fade. Because the material itself has excellent thermal stability, heat dissipation requirements can be met without relying on complex radial ventilation structures, thus simplifying the disc design.

[0051] In related technologies, brake discs, designed to meet the demands of racing conditions, employ a thicker structure and dense ventilation slots. However, this design faces challenges in passenger vehicle applications, including excessive weight, high cost, and complex manufacturing processes. Furthermore, the limited installation space in the rear axle braking system makes it impossible to accommodate brake discs, resulting in a difficulty in balancing braking performance with vehicle dynamics.

[0052] Through the technical solutions of the above embodiments, this application avoids the problems of heavy weight, high cost, and limited arrangement space caused by the reliance on large thickness structures and complex ventilation grooves in traditional brake discs. While ensuring heat capacity and strength, the thickness and diameter of the disc body are reduced, realizing the miniaturization of the disc body size, reducing raw material consumption and processing complexity, and providing more flexible spatial adaptability for wheel end arrangement.

[0053] In some embodiments, the disc 110 is formed from a carbon fiber preform, which contains a reinforcing structure formed by the interlacing of long and / or short fibers. The carbon fiber preform refers to a three-dimensional mesh structure substrate formed by a fiber weaving process. Specifically, it can be achieved by combining axial arrangement of long fibers with interlayer puncture of short fibers. The interlaced distribution of fibers forms a three-dimensional reinforcing skeleton structure, which can effectively improve interlayer bonding strength.

[0054] After testing, the tangential shear strength of the brake disc in this application is greater than 12 MPa, and the bending strength is greater than 80 MPa. Among them, the bending strength refers to the ultimate ability of the disc body 110 to withstand bending load. The tangential shear strength can be improved by adjusting the axial arrangement ratio of long fibers and the interlacing density of short fibers. The continuous distribution of long fibers along the tangential direction can form the main load-bearing frame. By controlling the fiber arrangement angle and density distribution, the disc body 110 can still maintain sufficient bending stiffness in the thinning state. At the same time, the improvement of interlaminar shear strength avoids the defect of easy delamination of traditional short fiber disc bodies 110.

[0055] See also Figure 1 and Figure 2 In some embodiments, the diameter of the ventilation holes 1121 is 2-6 mm; the proportion of ventilation holes 1121 on the disc body in the braking area 112 is <5%. The friction surface of the braking area 112 is an annular band with a set radial dimension. A row of ventilation holes 1121 is arranged at least at equal intervals along the axial direction of the disc body 110 on this annular band. Each row of ventilation holes 1121 is arranged in a continuously curved shape in the circumferential direction of the disc body 110, so that the ventilation holes 1121 are evenly distributed across the entire friction surface of the braking area 112. Compared with related technologies, the solution of this application has a smaller diameter for the ventilation holes 1121 and fewer ventilation holes 1121 per unit area on the braking area 112, thus ensuring both the strength of the disc body 110 and good heat dissipation performance. While retaining the high thermal conductivity of carbon ceramic materials, the design optimizes strength, heat dissipation, and lightweighting: the ventilation holes 1121 penetrate the thermal boundary layer to improve airflow exchange efficiency and enhance heat dissipation uniformity. At the same time, the opening ratio is controlled within 5%, significantly reducing the stress concentration factor and ensuring that the tangential shear strength of the brake disc is greater than 12 MPa and the bending strength is greater than 80 MPa. This not only avoids the risk of thermal cracking but also reduces the moment of inertia through structural lightweighting, thus extending the brake life.

[0056] The brake disc of this application has been described above. Accordingly, this application also provides a brake assembly.

[0057] Figure 3 This is a front view of the braking assembly shown in an embodiment of this application; Figure 4 This is a perspective view of the braking assembly shown in an embodiment of this application.

[0058] See Figure 3 and Figure 4 The braking assembly provided in this application includes a brake disc 100 and a connector 200 as described in any of the above embodiments. The brake disc 100 and the connector 200 are coaxially arranged and fixedly connected by fasteners 300. The connector 200 is used to connect to the wheel hub.

[0059] In some embodiments, the connector 200 can be a mating assembly (also called a hub mounting flange, brake disc hub, or axle head). The mating assembly is rigidly connected to the connection area of ​​the disc body via a ring array of fasteners 300, and the connection interface is perpendicular to the rotation axis of the disc body. Coaxial arrangement means that the rotation center axes of the brake disc 100 and the connector 200 coincide, ensuring a symmetrical distribution of the force transmission path. The mating assembly 200 is rigidly fixed to the connection area 111 of the disc body 110 via ring-distributed bolts. The bolts pass through pre-drilled mounting holes in the connection area 111 of the mating assembly 200 and the disc body 110, and are locked in place with nuts and washers. The mating surfaces of the connector 200 and the wheel hub are coaxially aligned through an axial positioning structure, avoiding vibration or stress concentration caused by installation eccentricity.

[0060] In some embodiments, the coupling component 200 is made of a metal material, such as aluminum alloy, but not limited to it. The aluminum alloy material can reduce the overall weight of the braking assembly. The bolts can be made of stainless steel and are equipped with anti-loosening washers. The screw sleeve is embedded in the mounting hole of the connection area 111 of the disc body 110 to enhance the threaded connection strength.

[0061] Accordingly, this application also provides a vehicle equipped with a braking assembly as described in the above embodiment. In this embodiment, an adjustment margin is maintained between the outer edge of the disc 110 and the inner wall of the vehicle wheel hub to accommodate different vehicle models. Simultaneously, finite element simulation is used to verify the stress distribution under different diameter values, ensuring structural reliability. When applied to the rear axle braking system of a vehicle, this diameter range is adapted to the vehicle's inertia characteristics, satisfying the braking torque transmission requirements while avoiding material waste caused by over-design.

[0062] Through the above technical solution, this application achieves a compact connection between the braking assembly and the vehicle wheel hub, reducing installation space requirements and improving assembly efficiency. This application effectively solves the problem of difficult wheel-end arrangement caused by the excessive size of vehicle brake discs in related technologies, significantly reducing material consumption and vehicle production cycle while ensuring braking performance.

[0063] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A brake disc, characterized in that, include: Braking area and connecting area, The connection area is located near the center hole of the brake disc body; The braking area is located near the periphery of the brake disc body; The brake disc has a solid structure, its diameter is within a first range, and its thickness is within a second range.

2. The brake disc according to claim 1, characterized in that: The braking area has several ventilation holes distributed along the circumference of the disc body, and the ventilation holes are axially connected along the disc body. There is no radial ventilation structure inside the disc body.

3. The brake disc according to claim 1, characterized in that: The first range is 280mm~400mm; and / or, The second range is 12mm to 30mm.

4. The brake disc according to claim 2, characterized in that: The diameter of the ventilation hole is 2~6mm; The proportion of the ventilation holes in the braking area is less than 5%.

5. The brake disc according to claim 1, characterized in that: The disc surface is provided with a coating, which at least covers the friction surface of the braking area.

6. The brake disc according to any one of claims 1-5, characterized in that: The disk body is made of carbon fiber reinforced silicon carbide ceramic matrix composite material.

7. The brake disc according to claim 6, characterized in that: The disc body is formed by processing a carbon fiber preform, the carbon fiber preform containing a reinforcing structure formed by interlacing long fibers and / or short fibers.

8. A braking assembly, characterized in that, include: Brake disc as described in any one of claims 1-7; as well as A connector is provided, wherein the brake disc is coaxially arranged with the connector and is fixedly connected by fasteners; the connector is used to connect to the wheel hub.

9. The braking assembly according to claim 8, characterized in that: The connection structure includes a mortise; The connector is rigidly connected to the connection area of ​​the disk body through a ring array of fasteners, and the connection interface is perpendicular to the rotation axis of the disk body.

10. A vehicle, characterized in that: The vehicle is equipped with a braking assembly as described in any one of claims 8-9.

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