Anti-lock brake disc

Abstract

The invention relates to the technical field of vehicle braking, in particular to an anti-lock brake disc, which comprises a brake disc body with a first disc surface and a second disc surface, and is characterized in that an annular brake part on which a brake pad of a brake acts is arranged on the first disc surface and / or the second disc surface; a plurality of smooth transition units are arranged on the annular brake part, and friction surfaces are arranged between the adjacent smooth transition units; the smooth transition unit is a groove and / or a through groove formed in the annular brake part. Compared with the prior art, the anti-lock brake disc has the advantages that the anti-lock control of a vehicle can be realized without additionally arranging a convex part on the disc surface and changing the brake pad, and compared with the traditional convex part, the anti-lock brake disc is smaller in abrasion and longer in service life.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle braking, and particularly to an anti-lock brake disc. Background Art

[0002] The popularization of vehicles has brought a lot of convenience to people's lives, especially shortening the time required for a single journey. In order to facilitate parking, various vehicles in daily life have a braking system. Among them, automobiles all have an anti-lock braking system, abbreviated as ABS. Its function is to automatically control the magnitude of the braking force of the brake when the vehicle is braking, so that the wheels are not locked and are in a state of rolling and sliding at the same time, so as to ensure that the adhesion between the wheels and the ground is at the maximum value.

[0003] However, in the field of electric vehicles, especially the braking devices applicable to two-wheeled electric vehicles, whether it is a hydraulic disc brake or a drum brake, it can only lock the wheels when braking. And when the wheels are locked, it is easy to cause a decrease in the friction between the tire and the ground, and the tire loses its grip, thus triggering uncontrollable dangerous situations such as vehicle sideslip and tail swing. That is, most current electric vehicles do not have an anti-lock system, which will cause the phenomenon of brake lock when suddenly braking during the riding of an electric vehicle, triggering serious accidents such as tire sideslip and tire skidding. Especially on low-adhesion roads such as rainy days and slippery roads, the probability of this situation occurring is higher, thus causing the electric vehicle to lose control and resulting in dangerous accidents.

[0004] In response to this, the Chinese invention patent with the publication number CN114382807A discloses an anti-lock brake disc, including a brake disc and a brake. The brake is provided with a brake pad for contacting the brake disc and stopping the rotation of the brake disc through friction. Along the circumferential direction of the brake disc, raised friction blocks are evenly distributed; along the circumferential direction of the brake disc, a smooth transition surface is provided between two adjacent raised friction blocks; the raised friction block includes a raised friction surface parallel to the brake disc and a raised transition surface provided around the raised friction surface; the brake pad includes a curved brake pad matching the raised friction block, and the curved brake pad includes a curved friction surface and a curved transition surface provided around the curved friction surface; the curved friction surface is parallel to the raised friction surface. This structural design of dividing the raised friction blocks and the smooth transition surface on the brake disc realizes the periodic change of the braking force, thereby preventing the brake pads from locking the brake disc, and the structure is compact and does not require an additional auxiliary system.

[0005] However, if used for a long time, the raised friction blocks and the curved brake pads on the brake pads that increase the friction by mutual friction will inevitably be worn, and then the height of the raised friction blocks and / or the curved brake pads will be reduced, or even worn flat, so that the locking effect will be significantly reduced or even disappear, and then the anti-lock function will be lost.

[0006] In addition, to implement this solution, that is, it is necessary to set up raised friction blocks on the surface of the brake disc, and it is also necessary to set up a curved surface brake pad on the brake shoe that matches the raised friction blocks, which will inevitably increase the processing cost.

[0007] Therefore, there is an urgent need for a new technical solution to solve the above technical problems. Summary of the Invention

[0008] The purpose of the present invention is to overcome the problems of the above-mentioned existing technologies, and provides an anti-lock brake disc, which is used to solve the technical problems that both the motor module and the rotating shaft driving device on the existing auxiliary wheel device are arranged outside the auxiliary roller support arm. Due to the lack of external protection, it is very easy to collide with external objects during vehicle driving, which will cause damage and reduce the service life; and because the motor module is arranged on the top of the mounting plate perpendicular to the fork bracket, it is necessary for the electric vehicle to have sufficient installation space during installation, which affects the installation of the auxiliary wheel device.

[0009] The above purpose is achieved through the following technical solutions: An anti-lock brake disc includes a brake disc body having a first disc surface and a second disc surface. It is characterized in that an annular braking portion for the brake pads of the brake to act on is provided on the first disc surface and / or the second disc surface, and a number of smooth transition units are provided on the annular braking portion, and the space between adjacent smooth transition units serves as a friction surface; the smooth transition unit is a groove and / or a through groove opened on the annular braking portion.

[0010] Further, the outer shape of the smooth transition unit is smaller than the outer shape of the brake pad.

[0011] Further, the smooth transition unit includes at least one of the groove and / or the through groove.

[0012] Further, a friction reduction module is provided in the groove and / or the through groove, and the outer surface of the friction reduction module is flush with the top of the groove and / or the through groove.

[0013] Further, the friction reduction module is graphite.

[0014] Further, the groove and / or the through groove are rectangular and are arranged at equal intervals on the annular braking portion.

[0015] Further, the groove and / or the through groove are circular and are arranged at equal intervals on the annular braking portion.

[0016] Further, the brake disc body is made of semi-metallic material.

[0017] Further, the brake disc body is made of ceramic material.

[0018] Further, the brake pads are disc brake pads or brake linings.

[0019] An anti-lock brake disc provided by the present invention directly sets an annular brake part overlapping with its first disc surface and / or the second disc surface on the brake disc body, and by arranging a number of smooth transition units on the annular brake part, when the annular brake part acts with the brake pads, surfaces with small friction and surfaces with large friction are created on the annular brake part. Through the rotation of the brake disc relative to the brake pads, friction - friction reduction - friction... is realized, and so on in a cycle, to achieve anti-lock deceleration of the vehicle until the vehicle completely stops. Compared with the prior art, this anti-lock brake disc does not need to add raised parts on the disc surface, and even less need to modify the brake pads, and can achieve anti-lock control of the vehicle. Moreover, compared with traditional raised parts, it has less wear and longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a smooth transition unit being a through groove in an anti-lock brake disc according to the present invention; Figure 2 It is a schematic structural diagram of a smooth transition unit being a groove in an anti-lock brake disc according to the present invention; Figure 3 It is a schematic diagram of the first disc surface and the second disc surface of an anti-lock brake disc according to the present invention acting with the brake pads; Figure 4 It is a schematic diagram of the application of a smooth transition unit being a groove in an anti-lock brake disc according to the present invention with a brake; Figure 5 It is a schematic diagram of the application of a smooth transition unit being a through groove in an anti-lock brake disc according to the present invention with a brake; Figure 6 It is a schematic diagram of three equally spaced waist-shaped through grooves as smooth transition units in an anti-lock brake disc according to the present invention; Figure 7 It is a schematic diagram of three equally spaced waist-shaped grooves as smooth transition units in an anti-lock brake disc according to the present invention; Figure 8 It is a schematic diagram of a friction reduction module arranged in a groove or a through groove in an anti-lock brake disc according to the present invention.

[0021] Illustration marks: 1 - Brake disc body, 101 - First disc surface, 102 - Second disc surface; 2 - Annular brake part; 3 - Smooth transition unit, 301 - Groove, 302 - Through groove; 4 - Brake, 401 - Brake pads; 5 - Friction reduction module. DETAILED DESCRIPTION OF THE INVENTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] As Figures 1 to 3 shown, this solution provides an anti-lock brake disc, including a brake disc body 1 having a first disc surface 101 and a second disc surface 102, characterized in that an annular braking portion 2 for the brake pads 401 of the brake 4 to act on is provided on the first disc surface 101 and / or the second disc surface 102, and a plurality of smooth transition units 3 are provided on the annular braking portion 2, and the space between adjacent smooth transition units 3 serves as a friction surface; The smooth transition unit 3 is a groove 301 and / or a through groove 302 opened on the annular braking portion 2.

[0024] Specifically, this solution provides an anti-lock brake disc that can be used with the brake pads 401 of conventional brakes on the market. Without modifying the original brake pads 401, the purpose of anti-lock braking of the vehicle can be achieved.

[0025] This anti-lock brake disc has the following specifications: Specification 1: The annular braking portion 2 is provided on the first disc surface 101 of the brake disc body 1, and then a plurality of smooth transition units 3 are provided on the replacement braking portion 2. The smooth transition unit 3 can be a groove 301 opened on the annular braking portion 2, or a through groove 302 opened on the annular braking portion 2, or both the through groove 302 and the groove 301; the distances of the smooth transition units 3 are set according to the vehicle control requirements. In this embodiment, an equal-spacing setting is preferably adopted, and this setting can provide relatively stable control for the vehicle. In this specification, anti-lock control of the brake pads 4 on one side of the first disc surface 101 can be achieved.

[0026] Specification 2: The annular braking parts 2 are symmetrically arranged on the first disc surface 101 and the second disc surface 102 of the brake disc body 1. Then, a number of smooth transition units 3 are symmetrically arranged on the two replacement braking parts 2. The smooth transition unit 3 can be a groove 301 formed in the annular braking part 2, or a through groove 302 formed in the annular braking part 2, or both the through groove 301 and the groove 302; the distances of the smooth transition units 3 are set according to vehicle control requirements. In this embodiment, an equal-spacing setting is preferably adopted, and this setting can provide relatively stable control for the vehicle. Under this specification, it can be realized that the two brake pads 401 of the brake 4 act on the first disc surface 101 and the second disc surface 102 at the same time. Compared with Specification 1, the anti-lock effect is more accurate.

[0027] The above is only a part of the embodiments shown in this solution. Other transformations based on this structure and connection relationship belong to the scope protected by this solution.

[0028] As Figure 4 and Figure 5 As shown, this solution uses the annular braking part 2 overlapping with the first disc surface 101 and / or the second disc surface 102 as the main friction surface of the brake pad 401. When braking, the brake pad 401 will be completely attached to it, and at this time, the friction reaches the maximum; while the smooth transition unit 3 with a horizontal height lower than this friction surface is used to reduce friction (the brake pad 401 only adheres to a part of the annular braking part 2 outside the smooth transition unit 3), and the brake pad 401 cannot be attached to it. Therefore, no friction force is generated in this area relative to the brake pad 401. At this time, under the action of inertia, the rotation speed of the brake disc is greater than the rotation speed when the brake pad 401 acts on the friction surface. By alternately increasing friction - reducing friction - increasing friction... and so on in a cycle, the anti-lock deceleration of the vehicle is realized until the vehicle stops completely.

[0029] It should be noted that in this embodiment, the outer shape of the smooth transition unit 3 is smaller than the outer shape of the brake pad 401, so as to ensure that the brake pad 401 will not be completely trapped in the groove 301 or the through groove 302 under the action of external pressure, and avoid the collision between the brake pad 401 and the inner wall of the groove 301 or the through groove 302 during the rotation of the brake disc 1, thereby causing the problem of locking.

[0030] In this embodiment, the smooth transition unit 3 includes at least one groove 301 and / or the through groove 302.

[0031] As the first specific embodiment of this solution, the groove 301 and / or the through groove 302 are rectangular and are arranged at equal intervals on the annular braking part.

[0032] As the second specific embodiment of this solution, the groove 301 and / or the through groove 302 are circular and are arranged at equal intervals on the annular braking portion.

[0033] As Figure 6 and Figure 7 shown, as the third specific embodiment of this solution, the smooth transition unit 3 includes three waist-shaped grooves or waist-shaped through grooves arranged at equal intervals.

[0034] As Figure 8 shown, a friction reduction module 5 is arranged in the groove 301 and / or the through groove 302, and the outer surface of the friction reduction module 5 is flush with the top of the groove 301 and / or the through groove 302, so as to make the outer surface of the friction reduction module 5 level with the first disk surface 101 and / or the second disk surface 102 of the brake disk body.

[0035] In this structure, when the brake pads of the brake pass through the friction reduction module 5, the surface of the friction reduction module 5 can not only provide stable sliding support for the brake pads, but also, due to its small friction coefficient relative to the brake disk body 1, the sliding speed of the brake pads on the friction reduction module 5 is greater than the speed of the friction surface.

[0036] Specifically, the friction reduction module 5 is made of materials with a small friction coefficient such as graphite, molybdenum disulfide, copper powder, and lead.

[0037] Among them, graphite is a typical friction reduction material with a Mohs hardness of less than 2. It reduces the friction coefficient by forming a lubricating film and improves the wear resistance at the same time; in this brake disk, graphite can be used to balance the friction coefficient and thermal stability and reduce noise and dust during braking; Molybdenum disulfide has a layered structure, can effectively reduce the direct contact of the friction surface, and reduce the friction coefficient; it is suitable for high-temperature working conditions and can improve the heat resistance recession performance of the brake pads; Copper powder can form a transfer film in the friction material, reduce damage to the brake disk, and stabilize the friction coefficient at the same time; Lead, as a soft metal filler, can reduce the friction coefficient through plastic deformation.

[0038] When the smooth transition unit 3 is the groove 301, the above-mentioned materials with a small friction coefficient are filled in the groove 301, and its surface is ensured to be flush with the first disk surface 101 and / or the second disk surface 102 of the brake pad 401; When the smooth transition unit 3 is the groove 301, the above-mentioned materials with a small friction coefficient are filled in the through groove 302, and the surfaces on both sides of it are ensured to be flush with the first disk surface 101 and the second disk surface 102 of the brake pad 401.

[0039] It should be noted that for the filling or connection method of the friction reduction module 5 and the groove or the through groove in this embodiment, common methods in the market such as high-temperature and high-pressure sintering and bonding with mixed glue can be adopted to ensure that it will not fall off.

[0040] As an optimization of this solution, the brake disc body 1 is made of semi-metallic material. Specifically, the semi-metallic brake pads are mainly composed of metals such as iron, copper, and steel, with a metal content of 30%-65%. The friction performance is enhanced by metal fibers. It has the advantages of low cost, being the original factory standard for mainstream models, high temperature resistance (the working temperature can reach above 500°C), and strong braking force.

[0041] It is also possible to use low-metallic / low-metal brake pads, that is, the metal content is lower than that of semi-metallic (10%-30%), and non-metallic materials such as graphite and glass fiber are added. It has the advantages of a weight reduction of 15%-20% and a noise reduction of about (50 decibels), and is suitable for urban commuting vehicles.

[0042] As a further optimization of this solution, the brake disc body 1 is made of ceramic material, which is mainly composed of ceramic fibers such as aramid fibers and synthetic graphite, and some high-end products contain silicon carbide reinforcing materials; it has the advantages of high temperature resistance (the friction coefficient remains stable above 800°C), no metal dust, and extremely low noise.

[0043] In this embodiment, the brake pad 401 is a disc brake pad or a brake lining to better act on this anti-lock brake disc.

[0044] The above is only to illustrate the implementation manner of the present invention and is not used to limit the present invention. For those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-lock brake disc, comprising a brake disc body (1) having a first disc surface (101) and a second disc surface (102), characterized in that, An annular braking portion (2) for the brake pads (401) of the brake (4) to act on is provided on the first disk surface (101) and / or the second disk surface (102), and a number of smooth transition units (3) are provided on the annular braking portion (2), and the space between adjacent smooth transition units (3) serves as a friction surface; The smooth transition unit (3) is a groove (301) and / or a through groove (302) formed in the annular braking portion (2).

2. The anti-lock brake disc according to claim 1, characterized in that, The outer shape of the smooth transition unit (3) is smaller than the outer shape of the brake pad (401).

3. An anti-lock brake disc according to claim 1 or 2, characterized in that, The smooth transition unit (3) includes at least one of the groove (301) and / or the through groove (302).

4. The anti-lock brake disc according to claim 3, characterized in that, An antifriction module (5) is provided in the groove (301) and / or the through groove (302), and the outer surface of the antifriction module (5) is flush with the top of the groove (301) and / or the through groove (302).

5. The anti-lock brake disc according to claim 4, characterized in that, The antifriction module (5) is graphite.

6. The anti-lock brake disc according to claim 3, characterized in that, The groove (301) and / or the through groove (302) is rectangular and is arranged at equal intervals on the annular braking portion.

7. The anti-lock brake disc according to claim 3, characterized in that, The groove (301) and / or the through groove (302) is circular and is arranged at equal intervals on the annular braking portion.

8. The anti-lock brake disc according to claim 1, characterized in that, The brake disc body (1) is made of semi-metallic material.

9. An anti-lock brake disc according to claim 1, characterized in that, The brake disc body (1) is made of ceramic material.

10. The anti-lock brake disc according to claim 1, characterized in that, The brake pad (401) is a disc brake pad or a brake lining.

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