Brake disc, brake and vehicle

Abstract

A brake disc (100), comprising a base body (1), which comprises a first surface (111) and a second surface (112) arranged oppositely, an edge of at least one of the first surface (111) and the second surface (112) being provided with a protruding structure (130), wherein the protruding structure (130) protrudes in the direction of thickness of the base body (1). The protruding structure arranged at the edge can protect at least one of the first surface and the second surface, thereby reducing the risk of cracking and damage of the surface of the base body caused by the direct impact of stones on the surface of the base body.

Description

Brake disc, brake and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202421592706.7 filed on July 5, 2024, the whole content of the above application is incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of brakes, in particular to a brake disc, a brake and a vehicle. BACKGROUND

[0003] In order to meet the requirements of high friction coefficient and long service life of the brake disc, a friction layer is usually loaded on the base body of the brake disc. In the related art, the friction layer and the base body in the brake disc are in an upper and lower layer structure, that is, the friction layer covers the surface of the base body. However, this arrangement is prone to cause the friction layer at the edge of the brake disc to crack and fall off due to the impact of stones and the like, thereby causing the edge of the friction layer to have a missing corner and the friction layer to be damaged. TECHNICAL PROBLEM

[0004] The present application aims to improve the technical problem that the friction layer at the edge of the brake disc is damaged due to the impact of stones. TECHNICAL SOLUTION

[0005] The present application provides a brake disc, comprising a base body, the base body comprising a first surface and a second surface arranged oppositely, and an edge of at least one of the first surface and the second surface is provided with a protruding structure; wherein the protruding structure protrudes towards the thickness direction of the base body.

[0006] The present application also provides a brake, comprising the brake disc as described above.

[0007] The present application also provides a vehicle, comprising the brake as described above. ADVANTAGEOUS EFFECTS

[0008] The brake disc provided by the present application comprises a base body, the base body comprising a first surface and a second surface arranged oppositely, and an edge of the first surface or the second surface is provided with a protruding structure protruding towards the thickness direction of the base body, or the edges of the first surface and the second surface are both provided with protruding structures protruding towards the thickness direction of the base body. The protruding structure arranged at the edge can protect at least one of the first surface and the second surface, and reduce the risk of cracking and damage of the surface of the base body caused by the direct impact of stones on the surface of the base body. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 is a perspective structural schematic view of the brake disc provided by the present application;

[0010] Fig. 2 is a rear view of the brake disc provided by the present application;

[0011] Fig. 3 is a front view of the brake disc according to an embodiment of the present application;

[0012] Fig. 4 is a sectional view taken along line A-A in Fig. 3;

[0013] Fig. 5 is an enlarged view of B in Fig. 4;

[0014] Fig. 6 is a structural block diagram of the brake according to an embodiment of the present application;

[0015] Fig. 7 is a structural block diagram of the vehicle according to an embodiment of the present application.

[0016] Legend: 100, brake disc; 1, base body; 111, first surface; 112, second surface; 120, friction layer; 121, first friction layer; 122, second friction layer; 130, protrusion structure; 131, first protrusion structure; 1311, first sub-protrusion structure; 1312, second sub-protrusion structure; 132, second protrusion structure; 1321, third sub-protrusion structure; 1322, fourth sub-protrusion structure; 140, contact surface; 200, brake; 300, vehicle. Embodiments of the present application

[0017] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0018] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, and the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, and the horizontal height of the first feature is less than that of the second feature.

[0019] In the description of the embodiments, the terms "upper", "lower", "left", "right", "front", "back", and the like, orientation or positional relationships are based on the orientation or positional relationships shown in the drawings, and are for the convenience of description and simplification of operation, 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, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used to distinguish in the description and have no special meaning.

[0020] The present application provides a brake disc 100, please refer to FIG. 1, wherein FIG. 1 (A) and (B) are respectively the three-dimensional structure schematic diagram of the brake disc 100 from different perspectives.

[0021] The brake disc 100 includes a base body 1, which includes a first surface 111 and a second surface 112, and the edge of at least one of the first surface 111 and the second surface 112 is provided with a protruding structure 130. Wherein, the protruding structure 130 protrudes towards the thickness direction of the base body 1. The protruding structure 130 arranged at the edge of at least one of the first surface 111 and the second surface 112 can protect at least one of the first surface 111 and the second surface 112, and reduce the risk of surface collapse and damage of the base body 1 caused by direct impact of stones on the surface of the base body 1.

[0022] It should be noted that the protruding structure 130 can be integrally formed with the base body 1, or can be fixedly connected with the base body 1 by welding or other connection forms.

[0023] In some embodiments, please refer to FIG. 1, the base body 1 is a circular ring structure, and the circular ring structure of the base body 1 includes two edges, i.e. the inner side edge and the outer side edge. Wherein, at least one side edge of the first surface 111 is provided with the protruding structure 130. That is, the protruding structure 130 can be arranged only at one of the inner side edge and the outer side edge of the first surface 111, or can be arranged at both the inner side edge and the outer side edge of the first surface 111.

[0024] It can be understood that when the inner side edge and the outer side edge of the first surface 111 are both provided with the protruding structure 130, a groove structure is formed between the two protruding structures 130. The two protruding structures 130 can respectively protect the inner side edge and the outer side edge of the first surface 111.

[0025] In addition, it should be noted that the thickness direction of the base body 1 is the axial direction of the base body 1.

[0026] Similarly, at least one side edge of the second surface 112 is also provided with the protruding structure 130. That is, the protruding structure 130 can be provided only on one of the inner side edge and the outer side edge of the second surface 112, or can be provided on both the inner side edge and the outer side edge of the second surface 112.

[0027] It can be understood that when the inner side edge and the outer side edge of the second surface 112 are both provided with the protruding structure 130, a groove structure is formed between the two protruding structures 130. The two protruding structures 130 can respectively protect the inner side edge and the outer side edge of the second surface 112.

[0028] In some embodiments, referring to FIG. 2, the outer diameter of the base body 1 is R, the width of the protruding structure 130 located at one side edge of the first surface 111 or the second surface 112 is d, and 0.05%R≤d≤3%R. That is, d / R=0.05%-3%. If the width of the protruding structure 130 is too small, it is easy to cause low strength and easy to be damaged when being impacted by the outside world, and the protection effect is poor. If the width is too large, it will excessively occupy the space of the first surface 111 or the second surface 112.

[0029] For example, d / R can be 0.05%, 0.2%, 0.5%, 0.8%, 1%, 1.5%, 2%, 2.5% or 3%.

[0030] Here, the width of the protruding structure 130 refers to the width thereof in the radial direction of the base body 1.

[0031] In some embodiments, 1mm≤d≤15mm. By satisfying the requirement that the width d of the protruding structure 130 located at one side edge of the first surface 111 or the second surface 112 is 1mm≤d≤15mm, the structural strength of the protruding structure 130 can be improved, and at the same time, the space of the first surface 111 or the second surface 112 will not be excessively occupied.

[0032] For example, d can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm or 15mm.

[0033] In some embodiments, the brake disc 100 further comprises a friction layer 120. The friction layer 120 is arranged on at least one of the first surface 111 and the second surface 112. Here, the friction layer 120 and the protruding structure 130 are arranged on the same side of the base body 1, and the friction layer 120 and the protruding structure 130 cover different areas of at least one of the first surface 111 and the second surface 112, respectively.

[0034] That is, the friction layer 120 is arranged on the side of the base body 1 where the protruding structure 130 is present. For example, if the protruding structure 130 is arranged only on the first surface 111, then the friction layer 120 is arranged only on the first surface 111, and if the protruding structure 130 is arranged on both the first surface 111 and the second surface 112, then the friction layer 120 is arranged on both the first surface 111 and the second surface 112.

[0035] The friction layer 120 can improve the friction coefficient of the brake disc 100, thereby providing good braking effect, and the friction layer 120 arranged on at least one of the first surface 111 and the second surface 112 can reduce the wear of the base body 1 during braking, thereby improving the service life of the brake disc 100.

[0036] The friction layer 120 and the protruding structure 130 arranged on the same side cover different areas of at least one of the first surface 111 and the second surface 112, respectively. That is, the friction layer 120 and the protruding structure 130 arranged on the same side do not overlap each other in the thickness direction of the base body 1, but are laid flat in different areas. Since the friction layer 120 needs to ensure a high friction coefficient, the strength is generally low, and the protruding structure 130 arranged on the same side as the friction layer 120 can protect the edge of the friction layer 120, reducing or avoiding the situation of cracking and falling off of the edge of the friction layer 120 due to the impact of stones and the like.

[0037] In some embodiments, the thickness of the friction layer 120 is D1, and the thickness of the protruding structure 130 is D2, D2≥D1. That is, the protruding structure 130 arranged on the same surface can be flush with the friction layer 120, or protrude from the friction layer 120, thereby ensuring that the protruding structure 130 can cover the edge of the friction layer 120, thereby improving the protection of the edge of the friction layer 120.

[0038] For example, referring to FIGS. 1-3, the base body 1 is in the shape of a circular ring, and the thickness of the friction layer 120 and the protruding structure 130 refers to the thickness extending in the axial direction of the base body 1.

[0039] In some embodiments, 0≤D2-D1≤2mm. That is, the protruding structure 130 can be flush with the friction layer 120, or protrude from the friction layer 120 by 2mm or less. By controlling 0≤D2-D1≤2mm, it can be ensured that the edge of the friction layer 120 is effectively covered by the protruding structure 130, avoiding the situation that small stones and the like directly impact the edge of the friction layer 120 during operation of the brake disc 100, and the protruding structure 130 does not interfere with other components of the brake disc 100.

[0040] In some embodiments, 0.2mm≤D1≤3mm, 0.2mm≤D2≤3mm.

[0041] The main component of the friction layer 120 is silicon carbide, which has a large coefficient of thermal expansion. If the thickness of the friction layer 120 is too large, the friction layer 120 is prone to cracking, and the bonding force between the friction layer 120 and the base 1 is weak, which can further cause the friction layer 120 to peel off. If the thickness of the friction layer 120 is too small, the service life of the friction layer 120 is insufficient, and the friction coefficient is reduced. Controlling the thickness of the friction layer 120 within the range of 0.2mm-3mm can reduce the risk of cracking, improve the bonding force of the friction layer 120, and at the same time ensure the service life and friction coefficient of the friction layer 120.

[0042] Similarly, in order to balance the protection effect of the protruding structure 130 and reduce the risk of peeling off the protruding structure 130, the thickness of the protruding structure 130 is also controlled within the range of 0.2mm-3mm.

[0043] Exemplarily, the thickness of the friction layer 120 can be 0.2mm, 0.5mm, 1mm, 1.5mm, 2.0mm, 2.5mm or 3.0mm. The thickness of the protruding structure 130 can be 0.2mm, 0.5mm, 1mm, 1.5mm, 2.0mm, 2.5mm or 3.0mm.

[0044] In some embodiments, the materials of the protruding structure 130 and the friction layer 120 are different. The friction layer 120 is provided to provide a good friction coefficient, and the protruding structure 130 needs to have a certain strength to improve its protection effect. Therefore, when specifically setting, the materials of the protruding structure 130 and the friction layer 120 are different to achieve different properties and play corresponding roles.

[0045] In some embodiments, the impact toughness of the protruding structure 130 is greater than the impact toughness of the friction layer 120. In order to improve the protection effect of the protruding structure 130 on the friction layer 120, the impact toughness of the protruding structure 130 is greater than the impact toughness of the friction layer 120. When a stone or the like impacts the edge of the brake disc 100, the protruding structure 130 with greater impact toughness is impacted first, thereby reducing or avoiding the risk of cracking and peeling off the friction layer 120 due to impact.

[0046] In some embodiments, the protruding structure 130 is integrally formed with the base 1. That is, the protruding structure 130 and the base 1 are an integral structure, which has high strength and can provide good protection. In the specific implementation process, the protruding structure 130 can be a part of the base 1, and in the process of manufacturing the brake disc 100, a groove is formed in the area where the friction layer 120 is needed to be arranged, while the structure of the base 1 in the area where the protruding structure 130 is needed to be arranged is unchanged. Since the brake disc 100 needs to work under high working strength, the base 1 itself has high strength and hardness, and using the structure of the base 1 itself as the protruding structure 130 can simplify the manufacturing process, ensure the bonding strength of the protruding structure 130 and the base 1, and improve the protection effect.

[0047] In some embodiments, the friction layer 120 includes a first friction layer 121 and a second friction layer 122, and the protruding structure 130 includes a first protruding structure 131 and a second protruding structure 132. The first friction layer 121 and the first protruding structure 131 are arranged on the first surface 111, and the first protruding structure 131 is located at at least one side edge of the first surface 111. The second friction layer 122 and the second protruding structure 132 are arranged on the second surface 112, and the second protruding structure 132 is located at at least one side edge of the second surface 112.

[0048] That is, the first surface 111 and the second surface 112 are both provided with the friction layer 120 and the protruding structure, and the first friction layer 121 and the second friction layer 122 arranged on the two surfaces respectively can increase the braking area of the brake disc 100, improve the braking performance, and make the wear of the two surfaces relatively uniform, thereby prolonging the service life. The first protruding structure 131 and the second protruding structure 132 arranged on the two surfaces respectively can provide protection for the first friction layer 121 and the second friction layer 122 respectively.

[0049] In some embodiments, the first protruding structure 131 includes a first sub-protruding structure 1311 and a second sub-protruding structure 1312. The first sub-protruding structure 1311 is located at the inner side edge of the first surface 111, the second sub-protruding structure 1312 is located at the outer side edge of the first surface 111, and the first friction layer 121 is arranged between the first sub-protruding structure 1311 and the second sub-protruding structure 1312.

[0050] Referring to FIG. 1 and FIG. 3, the first friction layer 121 and the first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 are arranged on the first surface 111. The first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 are arranged on the inner side edge and the outer side edge of the first surface 111 respectively, and the first friction layer 121 is arranged between the first sub-protrusion structure 1311 and the second sub-protrusion structure 1312. The first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 can protect the two side edges of the first friction layer 121, thereby improving the protection effect.

[0051] Similarly, in some embodiments, the second protrusion structure 132 includes a third sub-protrusion structure 1321 and a fourth sub-protrusion structure 1322. The third sub-protrusion structure 1321 is located on the inner side edge of the second surface 112, the fourth sub-protrusion structure 1322 is located on the outer side edge of the second surface 112, and the second friction layer 122 is arranged between the third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322.

[0052] Referring to FIG. 1 and FIG. 2, the second friction layer 122 and the third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322 are arranged on the second surface 112. The third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322 are arranged on the inner side edge and the outer side edge of the second surface 112 respectively, and the second friction layer 122 is arranged between the third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322. The third sub-protrusion structure 1321 and the fourth sub-protrusion structure 1322 can protect the two side edges of the second friction layer 122, thereby improving the protection effect.

[0053] In some embodiments, the thickness of the first friction layer 121 is D1, the thickness of the first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 is D2, and D2≥D1.

[0054] The thickness of the first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 is greater than or equal to the thickness of the first friction layer 121, the first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 can be flush with the first friction layer 121, or protrude from the first friction layer 121, so as to ensure that the first sub-protrusion structure 1311 and the second sub-protrusion structure 1312 can cover the edge of the first friction layer 121, thereby improving the protection effect of the first friction layer 121.

[0055] Similarly, in some embodiments, the thickness of the second friction layer 122 is D1, the thickness of the third sub-protruding structure 1321 and the fourth sub-protruding structure 1322 is D2, and D2≥D1. This allows the third sub-protruding structure 1321 and the fourth sub-protruding structure 1322 to be flush with or protrude from the second friction layer 122, ensuring that the third sub-protruding structure 1321 and the fourth sub-protruding structure 1322 can cover the edges of the second friction layer 122, thereby improving the protection of the second friction layer 122.

[0056] In some embodiments, referring to FIGS. 4 and 5, the contact surface 140 is formed between the adjacent friction layer 120 and the protruding structure 130, and the angle between the contact surface 140 and the first surface 111 is a, and 60°≤a≤90°.

[0057] The angle a is set to 60°≤a≤90°, i.e., the contact surface 140 between the friction layer 120 and the protruding structure 130 is perpendicular to the first surface 111, or the contact surface 140 between the friction layer 120 and the protruding structure 130 forms a certain angle with the first surface 111. When a=90°, the protruding structure 130 surrounds at least one side of the friction layer 120, protecting the edges of the friction layer 120, and the contact surface 140 between the friction layer 120 and the protruding structure 130 extends in the axial direction of the base body 1, and has a relatively narrow width, but the setting process of the friction layer 120 and the protruding structure 130 is relatively simple; when 60°≤a<90°, the contact surface 140 deviates from the axial direction of the base body 1, and the width is increased, thereby increasing the contact area between the friction layer 120 and the protruding structure 130 and improving the combination between the friction layer 120 and the protruding structure 130; when a<60°, although the width of the contact surface 140 is increased, the strength of the mutual contact area between the friction layer 120 and the protruding structure 130 is low. Therefore, in the present embodiment, the angle a is set to satisfy the condition of 60°≤a≤90°.

[0058] For example, referring to FIG. 5, the contact surface 140 is formed between the first friction layer 121 and the second sub-protruding structure 1312, and the angle a between the contact surface 140 and the first surface 111 is 90°.

[0059] The angle a can also be 65°, 70°, 75°, 80°, and 85°.

[0060] In some embodiments, the strength of the protruding structure 130 is 80-130 MPa, and the impact toughness is 10-40 kJ / m 2The protruding structure 130 is used to protect the edge of at least one of the first surface 111 and the second surface 112, especially the edge area of the friction layer 120, and thus requires high structural strength itself. In the embodiment, the strength of the protruding structure 130 is 80-130 MPa, and the impact toughness is 10-40 kJ / m 2 The manufacturing cost and protection effect of the protruding structure 130 are comprehensively considered.

[0061] Secondly, referring to FIG. 6, the application further provides a brake 200 comprising the brake disc 100 described above. The brake 200 has all the beneficial effects of the brake disc 100 described above, and the application will not be repeated here.

[0062] Thirdly, referring to FIG. 7, the application further provides a vehicle 300 comprising the brake 200 described above. The vehicle has all the beneficial effects of the brake 200 described above, and the application will not be repeated here.

[0063] The vehicle 300 can be a fuel automobile, a plug-in hybrid electric vehicle, or a new energy vehicle, and the application does not make specific limitations.

[0064] Taking a carbon ceramic brake disc as an example, the application exemplarily describes the preparation process of the brake disc:

[0065] The needle-punched body is obtained by stacking and needle-punching the unidirectional cloth and the net tire, wherein the included angle between adjacent unidirectional cloths is 90°;

[0066] The needle-punched body is subjected to chemical vapor deposition to obtain a preform, wherein the deposition temperature is 900-1100°C, and the deposition time is 400-600 h;

[0067] Grooves with a depth of 0.2 mm-3 mm are processed on the upper and lower surfaces of the preform, and a region with a width of 0.05%R-3%R is reserved on the outer diameter and inner diameter edges of the upper and lower surfaces of the preform as a protruding structure, wherein R is the outer diameter of the preform;

[0068] The silicon carbide particles, phenolic resin, and alcohol are mixed to obtain a friction layer slurry, wherein the particle size of the silicon carbide is 50-200 microns, the content of the silicon carbide is 30-50%, the content of the phenolic resin is 10-50%, and the content of the alcohol is 30-40%;

[0069] The friction layer slurry is coated in the grooves, and the thickness of each coating is 0.2 mm. After coating, drying is performed, and then coating and drying are continuously performed until the grooves are filled, wherein the drying temperature is 60°C, and the drying is performed until the sample no longer loses weight;

[0070] The curing is carried out at a temperature of 150 DEG C, and the curing time is 2-3 h;

[0071] The cured blank is put into a carbonization furnace for carbonization at a temperature of 1000 DEG C for 2-4 h;

[0072] The carbonized blank is deburred, and then liquid silicon infiltration is carried out to obtain a carbon ceramic blank, wherein the silicon infiltration temperature is 1600-1800 DEG C, and the holding time is 2-6 h;

[0073] The surface and side surface of the carbon ceramic blank are machined to obtain a carbon ceramic brake disc.

[0074] It can be understood that the preparation method provided in the embodiments of the present application is only an exemplary description for the carbon ceramic brake disc, and is not used to limit the protection scope of the present application, and other preparation methods can also be adopted by those skilled in the art as long as the structure of the above brake disc can be prepared.

[0075] The present application will be further described in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present application and not used to limit the scope of the present application.

[0076] It should be noted that in the following examples and comparative examples, the thickness of the friction layer refers to the thickness of the friction layer along the axial direction of the substrate, the thickness of the protruding structure refers to the thickness of the protruding structure along the axial direction of the substrate, and the width of the protruding structure refers to the width of the protruding structure along the radial direction of the substrate.

[0077] Example 1

[0078] (1) The unidirectional cloth and the net tire are laminated and needled to obtain a needled body, wherein the included angle between adjacent unidirectional cloths is 90 DEG ;

[0079] (2) The needled body is subjected to chemical vapor deposition to obtain a preform, wherein the deposition temperature is 1000 DEG C, and the deposition time is 500 h;

[0080] (3) A 0.5 mm groove is processed on the upper and lower surfaces of the preform, and a region with a width of 5 mm reserved on the outer diameter and the inner diameter edge of the upper and lower surfaces of the preform is used as a protruding structure;

[0081] (4) The silicon carbide particles, the phenolic resin and the alcohol are mixed to obtain a friction layer slurry, wherein the particle size of the silicon carbide is 120 microns, the content of the silicon carbide is 35%, the content of the phenolic resin is 30%, and the content of the alcohol is 35%;

[0082] (5) The friction layer slurry is coated in the above groove, and the thickness of each coating is 0.2 mm. After coating, drying is carried out, and then coating and drying are continuously carried out until the above groove is filled, wherein the drying temperature is 60 DEG C, and the drying is carried out until the sample no longer loses weight.

[0083] (6) curing at a temperature of 150℃ for 2h;

[0084] (7) carbonizing the cured body in a carbonization furnace at a temperature of 1000℃ for 3h;

[0085] (8) removing burrs from the carbonized body, and then performing liquid silicon infiltration to obtain a carbon ceramic body, wherein the silicon infiltration temperature is 1600℃, and the holding time is 3h;

[0086] (9) mechanically processing the surface and side surface of the carbon ceramic body to obtain a carbon ceramic brake disc.

[0087] In the carbon ceramic brake disc prepared in this example, the thickness of the friction layer and the thickness of the protruding structure are both 0.5mm, and the width of the protruding structure is 5mm.

[0088] Example 2

[0089] The difference between this example and Example 1 is that in step (3), a region with a width of 8mm is reserved as a protruding structure on the outer diameter and inner diameter edges of the upper and lower surfaces of the preform, and the other conditions are the same as those in Example 1.

[0090] In the carbon ceramic brake disc prepared in this example, the thickness of the friction layer and the thickness of the protruding structure are both 0.5mm, and the width of the protruding structure is 8mm.

[0091] Example 3

[0092] The difference between this example and Example 1 is that in step (3), a 1mm groove is machined on the upper and lower surfaces of the preform, and the other conditions are the same as those in Example 1.

[0093] In the carbon ceramic brake disc prepared in this example, the thickness of the friction layer and the thickness of the protruding structure are both 1mm, and the width of the protruding structure is 5mm.

[0094] Comparative Example 1

[0095] The difference between this comparative example and Example 1 is that in step (3), no groove is machined on the upper and lower surfaces of the preform, and the friction layer slurry is directly coated on the upper and lower surfaces of the preform with a coating thickness of 0.5mm, and the other conditions are the same as those in Example 1. In the carbon ceramic brake disc prepared in this comparative example, only a friction layer is provided, and the thickness of the friction layer is 0.5mm.

[0096] The brake discs in Examples 1-3 and Comparative Example 1 were subjected to impact tests, and the strength and impact toughness of the protruding structures were tested. Among them, the test method of the impact test was: using a steel ball with a diameter of 60 mm and a weight of 572 g, the steel ball was dropped from a height of 60 cm to impact three point positions on the edge of the brake disc, and the average area size of the falling area on the edge of the brake disc was tested; the test method of the strength was carried out according to GB / T 6569-2006; the test method of the impact toughness was carried out according to the group standard "Passenger Car Carbon Ceramic Brake Disc Product Standard Test Method", and the results are shown in Table 1.

[0097] Table 1 Comparison table of average area of falling area on edge of brake disc in Examples 1-3 and Comparative Example 1

[0098] As can be seen from Table 1, the average area of the falling area on the edge in Examples 1-3 is smaller than that in Comparative Example 1. It is proved that the protection of the friction layer, especially the effective protection of the edge area of the friction layer, can be achieved by setting the protruding structure, the risk of cracking and falling of the friction layer caused by impact is reduced, and the service life of the brake disc is improved.

Claims

1. A brake disc (100) comprising: a base body (1) comprising a first surface (111) and a second surface (112) disposed oppositely, at least one edge of the first surface (111) and the second surface (112) being provided with a protruding structure (130); wherein the protruding structure (130) protrudes towards a thickness direction of the base body (1).

2. The brake disc of claim 1, wherein, the base body (1) is a ring structure; at least one side edge of the first surface (111) is provided with the protruding structure (130).

3. The brake disc of claim 1 or 2, wherein, the base body (1) is a ring structure; at least one side edge of the second surface (112) is provided with the protruding structure (130).

4. The brake disc of claim 2 or 3, wherein, an outer diameter of the base body (1) is R, a width of the protruding structure (130) located at one side edge of the first surface (111) or the second surface (112) is d, wherein 0.05%R≤d≤3%R.

5. The brake disc of claim 4, wherein, 1mm≤d≤15mm. 6.The brake disc according to any one of claims 1-5, further comprising a friction layer (120); the friction layer (120) is disposed on at least one of the first surface (111) and the second surface (112); the friction layer (120) and the protruding structure (130) are disposed on the same side of the base body (1), and the friction layer (120) and the protruding structure (130) cover different areas of at least one of the first surface (111) and the second surface (112), respectively.

7. The brake disc of claim 6 wherein, a thickness of the friction layer (120) is D1, and a thickness of the protruding structure (130) is D2, wherein D2≥D1.

8. A brake disc according to claim 7, characterised in that, 0≤D2-D1≤2mm.

9. The brake disc of claim 6 or 7, wherein, 0.2mm≤D1≤3mm, 0.2mm≤D2≤3mm.

10. The brake disc of any one of claims 6-9, wherein, the protruding structure (130) and the friction layer (120) are made of different materials.

11. The brake disc of claim 10, wherein, an impact toughness of the protruding structure (130) is greater than an impact toughness of the friction layer (120).

12. The brake disc of any one of claims 1-11, wherein, the protruding structure (130) is integrally formed with the base body (1).

13. The brake disc of any one of claims 6-11, wherein, the friction layer (120) comprises a first friction layer (121) and a second friction layer (122), and the protruding structure (130) comprises a first protruding structure (131) and a second protruding structure (132); wherein the first friction layer (121) and the first protruding structure (131) are disposed on the first surface (111), and the first protruding structure (131) is located at at least one side edge of the first surface (111); and the second friction layer (122) and the second protruding structure (132) are disposed on the second surface (112), and the second protruding structure (132) is located at at least one side edge of the second surface (112).

14. The brake disc of claim 13, wherein, The first protruding structure (131) comprises a first sub-protruding structure (1311) and a second sub-protruding structure (1312); wherein the first sub-protruding structure (1311) is located at the inner side edge of the first surface (111), the second sub-protruding structure (1312) is located at the outer side edge of the first surface (111), and the first friction layer (121) is arranged between the first sub-protruding structure (1311) and the second sub-protruding structure (1312).

15. The brake disc of claim 13 or 14, wherein, The second protruding structure (132) comprises a third sub-protruding structure (1321) and a fourth sub-protruding structure (1322); wherein the third sub-protruding structure (1321) is located at the inner side edge of the second surface (112), the fourth sub-protruding structure (1322) is located at the outer side edge of the second surface (112), and the second friction layer (122) is arranged between the third sub-protruding structure (1321) and the fourth sub-protruding structure (1322).

16. The brake disc of any one of claims 6-11, wherein, The contact surface (140) is formed between the adjacent friction layer (120) and the protruding structure (130); The included angle between the contact surface (140) and the first surface (111) is α, and 60°≤α≤90°.

17. The brake disc of claim 10 or 11, wherein, The strength of the protruding structure (130) is 80-130 MPa, and the impact toughness is 10-40 kJ / m2.

18. A brake (200) comprising the brake disc (100) according to any one of claims 1-17.

19. A vehicle (300) comprising the brake (200) according to claim 18.

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