Anti-lock brake disc device of electric bicycle

Abstract

The utility model relates to the technical field of electric bicycles, and discloses an anti-lock brake disc device of an electric bicycle, which comprises a brake disc and a brake actuating mechanism, the outer surface of one side of the brake actuating mechanism is fixedly connected with an oil inlet nozzle, and the outer surface of the other side of the brake actuating mechanism is fixedly connected with an oil outlet nozzle. The lower surface of the side, close to the oil outlet nozzle, of the brake executing mechanism is fixedly connected with an oil discharging nozzle, and the outer side of the oil discharging nozzle is in threaded connection with a sealing screw cap. According to the hydraulic brake pad, magnetic repulsive force is generated through the magnetic repulsive force assembly, the first magnet and the second magnet which are arranged in a homopolar mode and magnetic pole interaction, the installation gap is accurately controlled, the characteristics of the neodymium-iron-boron permanent magnet and buffering friction increasing of the brake pad are matched, braking is assisted through the magnetic repulsive force during braking, direct friction between the hydraulic brake pad and a brake disc is reduced, and the service life of the hydraulic brake pad is prolonged. And meanwhile, the anti-lock function triggered by magnetic force is achieved, and the braking stability and safety are improved.

Description

An anti-lock braking disc device for electric bicycles Technical Field

[0001] This utility model relates to the field of electric bicycle technology, and in particular to an anti-lock braking disc device for electric bicycles. Background Technology

[0002] As a key mode of transportation for short-distance urban travel, the number of electric bicycles continues to rise globally. Along with this growth trend, riding safety issues are becoming increasingly prominent. As a core component for ensuring riding safety, the performance of the braking system is directly related to the life and property safety of users.

[0003] A search revealed that Chinese Patent Publication No. CN217515324U discloses an anti-lock braking system (ABS) disc brake device for electric bicycles, relating to the field of disc brake technology. The device includes a brake caliper with a brake disc placed in its center. A front structure is connected to the upper part of the caliper, and a main brake component is detachably installed inside the caliper. In this design, the main brake component is detachably installed inside the caliper via screws. The caliper is connected to the front structure. During operation, hydraulic oil from the reservoir enters the caliper cavity through a hydraulic hose, causing the piston to lock the friction pads onto the brake disc. If high temperatures or poor hydraulic oil quality cause filter blockage, the small cap can be unscrewed to release gas or oil. Regularly releasing this air reduces the likelihood of the electric bicycle locking up, lowering the risk of accidents. Furthermore, the main brake component can be easily removed with screws, facilitating friction pad replacement by passengers or repairmen, reducing maintenance costs, and allowing for home maintenance.

[0004] While the aforementioned technologies achieve braking functionality, they only address the mechanical structure and hydraulic oil handling aspects without addressing wear optimization between the brake disc and brake pads. The purely mechanical friction braking method easily leads to excessive wear on the brake pads and brake disc, shortening their service life and causing locking-up, thus affecting braking stability and safety. Therefore, an anti-lock braking disc device for electric bicycles is proposed to solve these problems. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides an anti-lock braking disc device for electric bicycles. It aims to solve the problem that the existing technology only focuses on mechanical structure and hydraulic oil treatment, without addressing the wear optimization between the brake disc and brake pads. It adopts pure mechanical friction braking, which easily causes excessive wear of the brake pads and brake disc, shortens the service life, and is prone to lock-up, affecting braking stability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an anti-lock braking disc device for electric bicycles, comprising a brake disc and a brake actuator, wherein an oil inlet is fixedly connected to one outer surface of the brake actuator, an oil outlet is fixedly connected to the other outer surface of the brake actuator, an oil drain is fixedly connected to the lower surface of the brake actuator near the oil outlet, a sealing cap is threadedly connected to the outer side of the oil drain, a hydraulic brake pad is provided on the inner side of the brake actuator, an assembly assembly is provided between the brake actuator and the hydraulic brake pad, and a magnetic repulsion assembly is provided between the hydraulic brake pad and the brake disc;

[0007] The magnetic repulsion assembly includes a first magnet and a second magnet. The outer wall of the first magnet is fixedly connected to the inner surface of the hydraulic brake pad, and the outer wall of the second magnet is fixedly connected to the outer surface of the brake disc. A brake pad is attached to the outer side of the first magnet, and the outer wall of the brake pad is fixedly connected to the inner surface of the hydraulic brake pad.

[0008] As a further description of the above technical solution:

[0009] There are two first magnets, which are mirror images of each other along the central axis of the hydraulic brake pad.

[0010] As a further description of the above technical solution:

[0011] The second magnet is provided in two sets, and the two sets of second magnets are mirror images of each other along the central axis of the brake disc, and each set of second magnets is provided with multiple magnets distributed in a ring at equal intervals.

[0012] As a further description of the above technical solution:

[0013] The first magnet and the second magnet have the same magnetic pole arrangement, and the installation gap between the first magnet and the second magnet is 1.5mm ± 0.2mm.

[0014] As a further description of the above technical solution:

[0015] Both the first and second magnets are neodymium iron boron permanent magnets with nickel plating on the surface and a magnetic induction intensity ≥1.2T.

[0016] As a further description of the above technical solution:

[0017] The assembly includes a connecting bolt, the end of which is connected through to the outer surface of the brake actuator, and the outer side of the connecting bolt is provided with external threads.

[0018] As a further description of the above technical solution:

[0019] The outer thread of the external thread is connected to a lock nut, and a spring-supported flexible hose is sleeved on the outer side of the connecting bolt.

[0020] As a further description of the above technical solution:

[0021] The end of the spring-supported hose is attached to the surface of the hydraulic brake pad.

[0022] As a further description of the above technical solution:

[0023] A through hole is provided between the front and rear sides of the surface of the brake actuator. The inner wall of the through hole is adapted to the outer wall size of the connecting bolt. Hydraulic chambers are provided on both the front and rear sides of the inner wall of the brake actuator. A hydraulic oil pipe is connected between the two hydraulic chambers. The inside of the oil inlet is connected to the hydraulic chamber on one side, and the inside of the oil outlet and the oil drain are connected to the hydraulic chamber on the other side.

[0024] As a further description of the above technical solution:

[0025] The hydraulic brake pads are provided in two form, and the two hydraulic brake pads are mirror images of each other along the central axis of the connecting bolt. The outer surfaces of the two hydraulic brake pads are fixedly connected with sealing pistons, wherein the sealing pistons are slidably connected to the hydraulic chamber on the inner surface of the brake actuator.

[0026] This utility model has the following beneficial effects:

[0027] 1. In this utility model, a magnetic repulsion component is used to generate magnetic repulsion force through the interaction of the first and second magnets with the same poles. The installation gap is precisely controlled, and the characteristics of neodymium iron boron permanent magnets and the buffering and friction-increasing properties of the brake pads are combined to assist braking with magnetic repulsion force during braking. This reduces the direct friction between the hydraulic brake pads and the brake disc, reduces wear, and extends the service life of the braking system. At the same time, it realizes the anti-lock braking function triggered by magnetic force, improving braking stability and safety.

[0028] 2. In this utility model, by assembling components, a connecting bolt is used to pass through the brake actuator and the hydraulic brake pad. With the help of external threads and locking nuts, a detachable fastening connection is achieved. At the same time, a spring-supported hose is used to buffer and protect the connecting bolt and enhance the support stability of the hydraulic brake pad. This ensures that the brake actuator and the hydraulic brake pad maintain precise cooperation during braking, thereby improving the structural reliability and operational stability of the braking system. Attached Figure Description

[0029] Figure 1 is a three-dimensional schematic diagram of an anti-lock braking disc device for an electric bicycle proposed in this utility model.

[0030] Figure 2 is a schematic diagram of the disassembled structure of the brake disc and brake actuator of the anti-lock braking disc device for electric bicycles proposed in this utility model.

[0031] Figure 3 is a schematic diagram of the disassembled structure of the brake actuator, hydraulic brake pads, assembly components, brake pads, and sealing cap of an anti-lock braking disc device for electric bicycles proposed in this utility model.

[0032] Figure 4 is a schematic diagram of the split structure of the second magnet at the brake disc of an anti-lock braking disc device for electric bicycles proposed in this utility model.

[0033] Legend:

[0034] 1. Brake disc; 2. Brake actuator; 3. Hydraulic brake pad; 4. Assembly assembly; 41. Connecting bolt; 42. External thread; 43. Locking nut; 44. Spring support hose; 5. Magnetic repulsion assembly; 51. First magnet; 52. Brake pad; 53. Second magnet; 6. Oil inlet; 7. Oil outlet; 8. Oil drain; 9. Sealing cap. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] Referring to Figures 1, 2, and 4, this utility model provides an embodiment of an anti-lock braking disc device for electric bicycles, comprising a brake disc 1 and a brake actuator 2. An inlet 6 is fixedly connected to one outer surface of the brake actuator 2, which introduces brake fluid into the brake actuator 2 to provide a power source for the hydraulic system. An external brake fluid pump pumps the brake fluid through the inlet 6, thereby driving the internal components. An outlet 7 is fixedly connected to the other outer surface of the brake actuator 2, which discharges excess brake fluid from the hydraulic chamber after braking. To restore the system pressure to normal and ensure the circulation and stable operation of the braking system, a drain nozzle 8 is fixedly connected to the lower surface of the brake actuator 2 near the outlet nozzle 7. The drain nozzle 8 is mainly used to completely drain the brake fluid in the brake actuator 2 during system maintenance, repair or brake fluid replacement, which facilitates operation and maintenance. A sealing cap 9 is threadedly connected to the outside of the drain nozzle 8. When the drain nozzle 8 is not being drained, the sealing cap 9 can seal the drain nozzle 8 to prevent dust and impurities from entering the brake actuator 2, and at the same time prevent brake fluid leakage, ensuring the sealing and safety of the braking system.

[0037] Furthermore, hydraulic chambers are provided on both the front and rear sides of the inner wall of the brake actuator 2. These hydraulic chambers provide a pressure working space for the braking system. Pressure changes in the brake fluid within the hydraulic chambers drive related components to achieve the braking function. A hydraulic oil pipe connects the two hydraulic chambers, allowing the brake fluid to flow freely between them, ensuring uniform pressure transmission and consistent braking performance. The inlet nozzle 6 is internally connected to one hydraulic chamber, while the outlet nozzle 7 and drain nozzle 8 are internally connected to the other hydraulic chamber. This connection method forms a circulation channel for the brake fluid, allowing it to enter and exit the brake actuator 2 in an orderly manner, meeting the operational requirements of the braking system. A hydraulic brake pad 3 is located inside the brake actuator 2. The hydraulic brake pad 3 is a key component that directly contacts the brake disc 1 to achieve the braking function. Under the pressure of the hydraulic system, the hydraulic brake... The brake pads 3 and brake disc 1 generate friction, thereby slowing down or stopping the electric bicycle. There are two hydraulic brake pads 3, which are mirror images of each other along the central axis of the connecting bolt 41. The two hydraulic brake pads 3 are symmetrically arranged, which can make the brake disc 1 be subjected to uniform force during braking, avoid wear or deformation of the brake disc 1 due to uneven force, improve the service life of the brake disc 1 and the stability of the braking system. The outer surfaces of the two hydraulic brake pads 3 are fixedly connected to sealing pistons. The sealing pistons are used to form a sealed space in the hydraulic cavity to ensure the pressure stability of the hydraulic system. On the other hand, the hydraulic energy is converted into mechanical energy through the sliding of the piston, which drives the hydraulic brake pads 3 to move. The sealing pistons are slidably connected to the hydraulic cavity on the inner surface of the brake actuator 2. The sliding of the sealing pistons in the hydraulic cavity can precisely control the distance and pressure between the hydraulic brake pads 3 and the brake disc 1, so as to achieve precise adjustment of the braking effect.

[0038] Referring to Figures 1, 2, and 4, an assembly assembly 4 is provided between the brake actuator 2 and the hydraulic brake pad 3. The function of the assembly assembly 4 is to firmly connect the brake actuator 2 and the hydraulic brake pad 3 together, while ensuring that the two can achieve the predetermined functional cooperation and ensure the normal operation of the braking system. The assembly assembly 4 includes a connecting bolt 41, which is the core connecting component of the assembly assembly 4. The connecting bolt 41 is used to penetrate the brake actuator 2 and the hydraulic brake pad 3, connecting the two into a whole. The end of the connecting bolt 41 penetrates and connects to the outer surface of the brake actuator 2. The connecting bolt 41 penetrates the brake actuator 2, providing support and fixing points for the installation of the hydraulic brake pad 3, so that the hydraulic brake pad 3 can be stably installed on the brake actuator 2. A through hole is provided between the front and rear sides of the surface of the brake actuator 2. The inner wall of the through hole is adapted to the outer wall size of the connecting bolt 41. The through hole provides support for the installation of the connecting bolt 41. The connection channel is sized to match the connecting bolt 41, ensuring smooth installation and good stability after installation. This prevents the braking effect from being affected by loose connections during braking. The connecting bolt 41 has an external thread 42 on its outer side, and a locking nut 43 is connected to the outer thread of the external thread 42. The external thread 42 and the locking nut 43 work together. By rotating the locking nut 43, the connecting bolt 41 can be firmly fixed to the brake actuator 2, ensuring the reliability of the connection. A spring support hose 44 is sleeved on the outer side of the connecting bolt 41. The end of the spring support hose 44 is attached to the surface of the hydraulic brake pad 3. The spring support hose 44 can buffer and protect the connecting bolt 41 during braking. At the same time, the spring support hose 44 is attached to the inner side of the two hydraulic brake pads 3, further enhancing the support and protection of the hydraulic brake pads 3, and also helping to improve the overall stability of the braking system.

[0039] Referring to Figures 1-3, a magnetic repulsion component 5 is provided between the hydraulic brake pad 3 and the brake disc 1. The magnetic repulsion component 5 is designed to assist braking during the braking process by utilizing magnetic repulsion, reducing direct friction between the hydraulic brake pad 3 and the brake disc 1, thereby reducing wear and improving the service life and performance of the braking system. The magnetic repulsion component 5 includes a first magnet 51 and a second magnet 53. The first magnet 51 and the second magnet 53 are the core components of the magnetic repulsion component 5, generating magnetic repulsion through the interaction of their magnetic poles. The first magnet 51 and the second magnet 53 are arranged with the same magnetic poles, which enables the first magnet 51 and the second magnet 53 to generate a repulsive force between them. This magnetic repulsion can assist braking during the braking process. The braking system reduces the friction between the hydraulic brake pads 3 and the brake disc 1. The installation gap between the first magnet 51 and the second magnet 53 is 1.5mm ± 0.2mm. This installation gap has been precisely designed and experimentally verified to ensure that the magnetic repulsion force is within a suitable range. This effectively assists braking without affecting the normal operation of the braking system. Both the first magnet 51 and the second magnet 53 are neodymium iron boron permanent magnets with nickel plating. The magnetic induction intensity is ≥1.2T. Neodymium iron boron permanent magnets have advantages such as high magnetic energy product and high coercivity, which can generate strong magnetic repulsion force. Nickel plating can improve the corrosion resistance of the magnets and extend their service life. The magnetic induction intensity of ≥1.2T can ensure that sufficient magnetic repulsion force is generated to meet the braking assistance requirements.

[0040] Furthermore, the outer wall of the first magnet 51 is fixedly connected to the inner surface of the hydraulic brake pad 3. Two first magnets 51 are provided, mirror-image arranged along the central axis of the hydraulic brake pad 3. The outer wall of the second magnet 53 is fixedly connected to the outer surface of the brake disc 1. A brake pad 52 is attached to the outer side of the first magnet 51, and the outer wall of the brake pad 52 is fixedly connected to the inner surface of the hydraulic brake pad 3. The brake pad 52 increases the friction between the hydraulic brake pad 3 and the brake disc 1, ensuring reliable braking performance while providing magnetic repulsion-assisted braking, and also acting as a buffer. To protect and reduce wear on the magnet and brake disc 1, two sets of second magnets 53 are provided. The two sets of second magnets 53 are mirror images of each other along the central axis of the brake disc 1, and multiple second magnets 53 are distributed in a ring at equal intervals in each set. The first magnet 51 is fixed on the inner surface of the hydraulic brake pad 3, and the second magnet 53 is fixed on the outer surface of the brake disc 1. The second magnet 53 interacts with the first magnet 51 on the hydraulic brake pad 3 to generate magnetic repulsion. The magnetic repulsion can be directly applied between the hydraulic brake pad 3 and the brake disc 1, triggering the magnetic force, eliminating mechanical friction, and realizing the anti-lock braking function of magnetic repulsion assisted braking.

[0041] Working principle: When the electric bicycle needs to brake, the external brake pump starts and pumps brake fluid into the hydraulic chamber on one side of the inner wall of the brake actuator 2 through the inlet 6. The brake fluid forms pressure in the hydraulic chamber, pushing the sealed piston to slide, which in turn drives the hydraulic brake pads 3 fixed on the sealed piston to move towards the brake disc 1. Since the two hydraulic brake pads 3 are mirrored along the central axis of the connecting bolt 41, and the sealed piston precisely controls the distance and pressure between them and the brake disc 1, the brake disc 1 is subjected to uniform force, effectively avoiding wear and deformation.

[0042] As the hydraulic brake pad 3 approaches the brake disc 1, the magnetic repulsion component 5 begins to function. The first magnet 51 fixed on the inner surface of the hydraulic brake pad 3 and the second magnet 53 fixed on the outer surface of the brake disc 1, having the same magnetic poles and maintaining an installation gap of 1.5mm ± 0.2mm, generate a mutual magnetic repulsion force. This magnetic repulsion force assists the hydraulic brake pad 3 in contacting the brake disc 1, reducing direct mechanical friction and preventing lock-up. At the same time, the brake pad 52 increases the friction between the two, ensuring braking effect.

[0043] When braking ends, excess brake fluid in the hydraulic chamber is discharged through the outlet 7, restoring the system pressure to normal. If maintenance or repair is required, the sealing cap 9 of the drain nozzle 8 can be opened to completely drain the brake fluid from the brake actuator 2. The connecting bolt 41, locking nut 43, and spring support hose 44 in the assembly assembly 4 ensure a stable connection and operation between the brake actuator 2 and the hydraulic brake pads 3. Throughout the braking process, the anti-lock braking function of the electric bicycle is realized, effectively improving the safety, reliability, and service life of the braking system.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An anti-lock braking disc device for electric bicycles, comprising a brake disc (1) and a brake actuator (2), characterized in that: An oil inlet (6) is fixedly connected to one outer surface of the brake actuator (2), and an oil outlet (7) is fixedly connected to the other outer surface of the brake actuator (2). An oil drain (8) is fixedly connected to the lower surface of the brake actuator (2) near the oil outlet (7). A sealing cap (9) is threadedly connected to the outer side of the oil drain (8). A hydraulic brake pad (3) is provided on the inner side of the brake actuator (2). An assembly assembly (4) is provided between the brake actuator (2) and the hydraulic brake pad (3). A magnetic repulsion assembly (5) is provided between the hydraulic brake pad (3) and the brake disc (1); the magnetic repulsion assembly (5) includes a first magnet (51) and a second magnet (53). The outer wall of the first magnet (51) is fixedly connected to the inner surface of the hydraulic brake pad (3), and the outer wall of the second magnet (53) is fixedly connected to the outer surface of the brake disc (1). A brake pad (52) is attached to the outer side of the first magnet (51), and the outer wall of the brake pad (52) is fixedly connected to the inner surface of the hydraulic brake pad (3).

2. The anti-lock braking disc device for electric bicycles according to claim 1, characterized in that: There are two first magnets (51), and the two first magnets (51) are mirrored along the central axis of the hydraulic brake pad (3).

3. The anti-lock braking disc device for electric bicycles according to claim 1, characterized in that: The second magnet (53) is provided in two sets. The two sets of second magnets (53) are mirror images of the central axis of the brake disc (1), and each set of second magnets (53) is provided with multiple magnets in a ring at equal intervals.

4. The anti-lock braking disc device for electric bicycles according to claim 1, characterized in that: The first magnet (51) and the second magnet (53) are provided with the same magnetic poles, and the installation gap between the first magnet (51) and the second magnet (53) is 1.5mm ± 0.2mm.

5. The anti-lock braking disc device for electric bicycles according to claim 1, characterized in that: The first magnet (51) and the second magnet (53) are both neodymium iron boron permanent magnets with nickel plating on the surface and magnetic induction intensity ≥1.2T.

6. The anti-lock braking disc device for electric bicycles according to claim 1, characterized in that: The assembly component (4) includes a connecting bolt (41), the end of which is connected through to the outer surface of the brake actuator (2), and the outer side of the connecting bolt (41) is provided with an external thread (42).

7. The anti-lock braking disc device for an electric bicycle according to claim 6, characterized in that: The outer thread of the external thread (42) is connected to a locking nut (43), and the outer side of the connecting bolt (41) is fitted with a spring support hose (44).

8. The anti-lock braking disc device for electric bicycles according to claim 7, characterized in that: The end of the spring support hose (44) is attached to the surface of the hydraulic brake pad (3).

9. The anti-lock braking disc device for electric bicycles according to claim 1, characterized in that: The front and rear sides of the surface of the brake actuator (2) are provided with a through hole. The inner wall of the through hole is adapted to the outer wall size of the connecting bolt (41). The front and rear sides of the inner wall of the brake actuator (2) are provided with hydraulic chambers. A hydraulic oil pipe is connected between the two hydraulic chambers. The inside of the oil inlet (6) is connected to the hydraulic chamber on one side. The inside of the oil outlet (7) and the oil drain (8) are connected to the hydraulic chamber on the other side.

10. The anti-lock braking disc device for an electric bicycle according to claim 1, characterized in that: Two hydraulic brake pads (3) are provided. The two hydraulic brake pads (3) are mirror images of each other along the central axis of the connecting bolt (41). The outer surfaces of the two hydraulic brake pads (3) are fixedly connected with sealing pistons, wherein the sealing pistons are slidably connected to the hydraulic chamber on the inner surface of the brake actuator (2).

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