Brake disc

Abstract

The invention provides a brake disc, and relates to the technical field of brake discs. The brake disc comprises a base body and a coating, the base body comprises a main body part and a protection part, the main body part comprises a binding face and a mounting hole, the binding face is perpendicular to the main body part in the axial direction, and the mounting hole penetrates through the main body part in the axial direction; the main body part is provided with a fitting surface, the protection part protrudes from the fitting surface, the coating is fitted with the fitting surface, in the radial direction of the main body part, the coating is located on the side, facing the mounting hole, of the protection part, and in the axial direction, the coating is not higher than the protection part. In this way, the protection part can protect the edge of the coating, so that the edge of the coating is prevented from being damaged. And meanwhile, the brake disc protects the coating through the protection part, chamfers do not need to be formed on the edge of the coating, and the risk of edge breakage of the coating in the machining stage is reduced.

Description

Technical Field

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

[0002] The brake disc is an important component in the vehicle's braking system. In cars and other vehicles, the brake disc is mainly used to work with the brake caliper to slow down or stop the vehicle's movement through friction.

[0003] Brake discs can be made of cast iron, carbon ceramic and other materials, and the surface of carbon ceramic brake discs is generally provided with a molded coating. However, the coating material of carbon ceramic brake discs is brittle, and the edges of carbon ceramic brake discs are easily damaged during production, transportation, installation, disassembly, and use, which can cause eccentric wear of the friction plate, noise, and even safety risks.

[0004] In order to reduce the edge damage of the coating, the existing coating is generally chamfered on the edge to reduce the risk of edge damage. However, the chamfering of the coating edge during the processing stage is likely to cause the coating to collapse, and the risk of damage to the coating after the chamfer is formed is still high. Summary of the invention

[0005] In view of this, the present application provides a brake disc to solve the problem that the coating edge is easily broken when the coating edge is chamfered during the processing stage, and the risk of the coating being damaged by bumps is still high after the coating edge is chamfered.

[0006] The present application provides a brake disc, the brake disc comprising a substrate and a coating, the substrate comprising a main body and a protective part, the main body comprising a fitting surface and a mounting hole, the fitting surface is perpendicular to the main body in an axial direction, and the mounting hole penetrates the main body along the axial direction;

[0007] The protective portion protrudes from the fitting surface, and the coating fits with the fitting surface. In the radial direction of the main body, the coating is located on the side of the protective portion facing the mounting hole, and in the axial direction, the coating is not higher than the protective portion.

[0008] Preferably, the protection portion is arranged along the edge of the fitting surface, and a side of the coating facing away from the mounting hole in the radial direction fits with a side of the protection portion facing the mounting hole in the radial direction.

[0009] Preferably, a dimension of the protection portion in the axial direction is greater than or equal to 0.5 mm and less than or equal to 5 mm.

[0010] Preferably, a dimension of the protection portion in the radial direction is greater than or equal to 0.5 mm and less than or equal to 3 mm.

[0011] Preferably, the substrate further comprises a protruding member, the protruding member protrudes from the fitting surface along the axial direction, and a size of the protruding member in the axial direction is smaller than a size of the coating in the axial direction.

[0012] Preferably, a dimension of the protruding member in the axial direction is smaller than a dimension of the protecting portion in the axial direction.

[0013] Preferably, a difference between a dimension of the protection portion in the axial direction and a dimension of the protruding member in the axial direction is greater than or equal to 0.5 mm.

[0014] Preferably, the protruding member includes a plurality of protruding pieces, and the plurality of protruding pieces are all fixed on the fitting surface, and the extension directions of at least two of the plurality of protruding pieces intersect.

[0015] Preferably, the main body comprises two fitting surfaces, and the two fitting surfaces are respectively located at two sides of the main body opposite to each other in the axial direction;

[0016] The number of the protective parts and the protruding components are both two, and each of the fitting surfaces is provided with one protective part and one protruding component.

[0017] Preferably, the protruding member, the protecting portion and the main body portion are integrally formed.

[0018] In the brake disc of the present application, the brake disc includes a substrate and a coating, the substrate includes a main body and a protective part, the main body includes a fitting surface and a mounting hole, the fitting surface is perpendicular to the main body in the axial direction, and the mounting hole penetrates the main body in the axial direction; the protective part protrudes from the fitting surface, and the coating fits with the fitting surface. In the radial direction of the main body, the coating is located on the side of the protective part facing the mounting hole, and in the axial direction, the coating is not higher than the protective part. In this way, the protective part can protect the edge of the coating to avoid damage to the edge of the coating. At the same time, the brake disc protects the coating through the protective part, and there is no need to form a chamfer on the edge of the coating, which reduces the risk of edge collapse of the coating during the processing stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram showing the three-dimensional structure of a brake disc according to an embodiment of the present invention;

[0021] Figure 2 A schematic diagram showing the plan structure of a brake disc according to an embodiment of the present invention;

[0022] Figure 3 Show Figure 2 A cross-sectional view of the brake disc obtained by cutting along A-A';

[0023] Figure 4 Show Figure 3 A magnified view of part B;

[0024] Figure 5 A schematic diagram of the structure of the substrate is shown.

[0025] Icon: 1-main body; 11-mounting hole; 2-protective part; 3-coating; 4-protruding part; S-fitting surface. DETAILED DESCRIPTION

[0026] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0027] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0028] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0029] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0030] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0031] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0032] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0033] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0034] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0035] The present application provides a brake disc, such as Figures 1 to 5 As shown, the brake disc includes a substrate and a coating 3. The substrate includes a main body 1, a protective part 2 and a coating 3. The main body 1 includes a fitting surface S and a mounting hole 11. The fitting surface S is perpendicular to the axial direction, and the mounting hole 11 passes through the main body 1 in the axial direction. The protective part 2 protrudes from the fitting surface S, and the coating 3 fits with the fitting surface S. In the radial direction of the main body 1, the coating 3 is located on the side of the protective part 2 facing the mounting hole 11, and in the axial direction, the coating 3 is not higher than the protective part 2. In this way, the protective part 2 can protect the edge of the coating 3 to avoid damage to the edge of the coating 3. At the same time, the brake disc protects the coating 3 through the protective part 2, and there is no need to form a chamfer on the edge of the coating 3, which reduces the risk of edge collapse of the coating 3 during the processing stage.

[0036] Preferably, the surface of the protection portion 2 facing away from the contact surface S in the axial direction is flush with the surface of the protection portion 2 facing away from the contact surface S in the axial direction, thereby ensuring the flatness of the surface of the brake disc.

[0037] Preferably, the coating 3 may be a layered structure formed by a molding process and a siliconizing process.

[0038] In the embodiments of the present application, Figure 1 , Figure 2 and Figure 5 As shown, the protective part 2 is arranged along the edge of the fitting surface S, that is, the protective part 2 is a structure connected end to end, and the surface of the protective part 2 facing away from the mounting hole 11 in the radial direction is flush with the outer side wall of the main body 1. The side of the coating 3 facing away from the mounting hole 11 in the radial direction fits with the side of the protective part 2 facing the mounting hole 11 in the radial direction. In this way, the protective part 2 and the side of the coating 3 facing away from the mounting hole 11 in the radial direction are tightly fitted, so that the protective part 2 can fully protect the edge of the coating 3 to prevent the edge of the coating 3 from being damaged.

[0039] Furthermore, the protection portion 2 is a structure with equal thickness in the axial direction, such as Figure 4 As shown, the dimension L1 of the protective portion 2 in the axial direction is greater than or equal to 0.5 mm and less than or equal to 5 mm. For example, the dimension L1 of the protective portion 2 in the axial direction can be 0.5 mm, 0.8 mm, 1.0 mm, 1.3 mm, 1.5 mm, 2.0 mm, 2.2 mm, 2.5 mm, 3.0 mm, 3.7 mm, 4.0 mm, 4.8 mm or 5.0 mm. Setting the dimension L1 of the protective portion 2 in the axial direction within the above range can ensure that the protective portion 2 can protect the edge of the coating 3 to avoid damage to the edge of the coating 3.

[0040] Preferably, the dimension of the protection portion 2 in the axial direction is 2 mm.

[0041] In addition, the protection portion 2 has a uniform thickness in the radial direction. Figure 4 As shown, the dimension L2 of the protective part 2 in the radial direction is greater than or equal to 0.5 mm and less than or equal to 3 mm. For example, the dimension L2 of the protective part 2 in the radial direction may be 0.5 mm, 0.7 mm, 0.9 mm, 1.0 mm, 1.3 mm, 1.5 mm, 1.8 mm, 2.0 mm, 2.2 mm, 2.5 mm, 2.8 mm or 3.0 mm, etc. The dimension L2 of the protective part 2 in the radial direction is set within the above range, so that the protective part 2 has sufficient strength to ensure the protective effect of the protective part 2 on the coating 3, thereby preventing the edge of the coating 3 from being knocked off during the production, transportation, installation, disassembly and use of the brake disc.

[0042] Preferably, the dimension of the protection portion 2 in the radial direction is 2 mm.

[0043] In the embodiment of the present application, the main body 1 can be provided with a protruding member according to the requirements. When the protruding member is provided on the main body 1, as shown in FIG. Figure 5 As shown, the protruding member protrudes from the fitting surface S in the axial direction, and the size of the protruding member in the axial direction is smaller than the size of the coating 3 in the axial direction, so that the protruding member is completely covered inside the coating 3. By providing the protruding member, the adhesion surface area and shear force between the coating 3 and the main body 1 can be increased, ensuring that the coating 3 is stably attached to the main body 1.

[0044] In existing brake discs, carbon fiber is generally added to the raw material of coating 3 to increase the toughness of coating 3 and the adhesion of coating 3. However, adding carbon fiber to the raw material of coating 3 will change the friction performance of coating 3, and the high temperature generated by friction will easily cause high-temperature oxidation of carbon fiber, which will lead to the roughness of the surface of coating 3 and even cause the wear of friction plate to increase. The brake disc of the present application increases the adhesion surface area and shear force between coating 3 and main body 1 by providing a protruding member, and there is no need to add carbon fiber to coating 3, which avoids the roughness of the surface of coating 3 caused by friction and slows down the wear of friction plate.

[0045] Furthermore, the size of the protruding member in the axial direction is smaller than the size of the protecting portion 2 in the axial direction, which can prevent the protruding member from protruding relative to the protecting portion 2 and ensure the flatness of the surface of the brake disc.

[0046] Preferably, the difference between the size of the guard portion 2 in the axial direction and the size of the protruding member in the axial direction is greater than or equal to 0.5 mm, for example, the difference between the size of the guard portion 2 in the axial direction and the size of the protruding member in the axial direction can be 0.5 mm, 0.6 mm, 0.7 mm, 1.0 mm, etc. Since the surface of the guard portion 2 in the axial direction facing away from the fitting surface S is flush with the surface of the guard portion 2 in the axial direction facing away from the fitting surface S, setting the difference between the size of the guard portion 2 in the axial direction and the size of the protruding member in the axial direction within the above range can ensure that the coating 3 can completely cover the protruding member to avoid the protruding member from the coating 3, thereby ensuring the flatness of the surface of the brake disc. Preferably, the difference between the size of the guard portion 2 in the axial direction and the size of the protruding member in the axial direction is equal to 0.5 mm. At this time, the size of the protruding member in the axial direction is larger, which ensures the shear force between the coating 3 and the main body 1, thereby ensuring the stability of the coating 3 attached to the main body 1.

[0047] In addition, the protruding member includes a plurality of protruding pieces 4, and the plurality of protruding pieces 4 are fixed on the bonding surface S, and the extension directions of at least two of the plurality of protruding pieces 4 intersect. By the protruding pieces 4 intersecting with each other, the adhesion between the coating 3 and the main body 1 can be further improved.

[0048] Optionally, the protruding piece 4 may be a convex rib machined on the main body 1 .

[0049] like Figure 5 As shown, one of the protrusions 4 extends along the circumferential direction of the main body 1, and the protrusion 4 surrounds the mounting hole 11, and the other protrusions 4 extend along the radial direction of the main body 1, and the ends of the multiple protrusions 4 extending in the radial direction are connected to the protective part 2 at the ends facing away from the mounting hole 11 in the radial direction, and the multiple protrusions 4 extending in the radial direction are equidistantly spaced along the circumferential direction of the main body 1, and any protrusion 4 extending in the radial direction intersects with the protrusion 4 extending in the circumferential direction.

[0050] It should be noted that the number, shape and arrangement of the protruding elements 4 on the fitting surface S are not limited to Figure 5In the form shown in the figure, any number of protrusions 4 can be set on the bonding surface S according to the needs, and the protrusions 4 can be crossed or not crossed, and the multiple protrusions 4 can be arranged according to a certain rule or arranged irregularly. For example, there are multiple protrusions 4 on the bonding surface S, and the multiple protrusions 4 can be divided into two groups, wherein the extension directions of the protrusions 4 in one group are parallel, and the extension directions of the protrusions 4 in the other group are parallel, and the extension directions of the protrusions 4 in the two groups are crossed, at this time, the bonding surface S is divided into multiple "diamond" shaped areas; for another example, the bonding surface S can be provided with multiple non-crossed block-shaped protrusions 4, and for another example, the bonding surface S can be provided with only one block-shaped protrusion 4.

[0051] In the embodiment of the present application, the main body 1 includes two fitting surfaces S, which are located on two opposite sides of the main body 1 in the axial direction; the number of the protective parts 2 and the protruding components are both two, and each fitting surface S is provided with a protective part 2 and a protruding component. In this way, the two anti-slip parts can protect the two coatings 3 on both sides respectively to prevent the edges of the two coatings 3 from knocking and falling off during the production, transportation, installation, disassembly and use of the brake disc, and the two protruding components can improve the adhesion of the two coatings 3 on the two fitting surfaces S.

[0052] Preferably, the protruding member, the protection portion 2 and the main body 1 are integrally formed.

[0053] The brake disc of the present application increases the adhesion surface area and shear force between the coating 3 and the main body 1 by providing a protruding member, thereby ensuring that the coating 3 is stably attached to the main body 1. The edge of the coating 3 is protected by the protective part 2 to prevent the edge of the coating 3 from being damaged.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A brake disc, characterized in that: The brake disc comprises a substrate and a coating, the substrate comprises a main body and a protective part, the main body comprises a fitting surface and a mounting hole, the fitting surface is perpendicular to the main body in an axial direction, and the mounting hole penetrates the main body along the axial direction; The protective portion protrudes from the fitting surface, and the coating fits with the fitting surface. In the radial direction of the main body, the coating is located on the side of the protective portion facing the mounting hole, and in the axial direction, the coating is not higher than the protective portion.

2. The brake disc according to claim 1, characterized in that The protection part is arranged around the edge of the fitting surface, and the side of the coating facing away from the mounting hole in the radial direction fits with the side of the protection part facing the mounting hole in the radial direction.

3. The brake disc according to claim 1 or 2, characterized in that: A dimension of the protection portion in the axial direction is greater than or equal to 0.5 mm and less than or equal to 5 mm.

4. The brake disc according to claim 3, characterized in that A dimension of the protection portion in the radial direction is greater than or equal to 0.5 mm and less than or equal to 3 mm.

5. The brake disc according to claim 1, characterized in that The substrate further includes a protruding member, which protrudes from the fitting surface along the axial direction, and a size of the protruding member in the axial direction is smaller than a size of the coating in the axial direction.

6. The brake disc according to claim 5, characterized in that The dimension of the protruding member in the axial direction is smaller than the dimension of the guard portion in the axial direction.

7. The brake disc according to claim 6, characterized in that A difference between a dimension of the guard portion in the axial direction and a dimension of the protruding member in the axial direction is greater than or equal to 0.5 mm.

8. The brake disc according to any one of claims 5 to 7, characterized in that The protruding component includes a plurality of protruding pieces, and the plurality of protruding pieces are all fixed on the fitting surface, and the extension directions of at least two of the plurality of protruding pieces intersect.

9. The brake disc according to claim 5, characterized in that The main body comprises two fitting surfaces, and the two fitting surfaces are respectively located at two sides of the main body opposite to each other in the axial direction; The number of the protective parts and the protruding components are both two, and each of the fitting surfaces is provided with one protective part and one protruding component.

10. The brake disc according to claim 9, characterized in that The protruding member, the guard portion and the main body portion are integrally formed.

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