Pull wire type oil pressure disc brake mechanism

Abstract

The utility model discloses a stay wire type oil pressure disc brake mechanism which comprises a brake handle, an oil pipe, a pump body and a disc brake portion, a brake cable is arranged between the brake handle and the pump body, the brake handle is connected with the pump body through the brake cable, an oil storage cavity is arranged in the pump body, and the oil storage cavity is connected with the oil pipe. And the pump body is connected with the disc brake part through the oil pipe. By means of the design, the disc brake mechanism with the hidden oil pump is achieved, on the premise that the braking effect is guaranteed, the oil storage cavity is hidden in the pump body, the brake handle and the pump body are connected and driven through the brake cable, and therefore the disc brake part and the brake handle can be greatly adjusted according to the structural requirement of a whole vehicle; and the internally hidden pump body is not influenced by the change of an external structure, so that the overall universality and the use experience are improved.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle braking technology, and in particular to a cable-operated hydraulic disc brake mechanism. Background Technology

[0002] With the continuous development of electric bicycles, users have increasingly higher requirements for them. Currently, mainstream hydraulic disc brake systems typically integrate the oil reservoir into the brake lever. However, the presence of the oil reservoir makes the brake lever area bulky, affecting handling comfort and space utilization. Furthermore, the proximity of the oil reservoir to the brake lever limits the structural design space of the brake lever itself, preventing significant redesigns as needed. Therefore, improvements are needed to address these issues. Summary of the Invention

[0003] This invention addresses the shortcomings of existing technologies, such as the bulky brake lever area affecting control and space constraints, by providing a new cable-operated hydraulic disc brake mechanism.

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] A cable-operated hydraulic disc brake mechanism includes a brake handle, an oil pipe, a pump body, and a disc brake unit. A brake cable is provided between the brake handle and the pump body, and the brake handle and the pump body are connected through the brake cable. An oil reservoir is provided inside the pump body, and the pump body and the disc brake unit are connected through the oil pipe.

[0006] Through the above design, this utility model realizes a disc brake mechanism with a hidden oil pump. While ensuring braking effect, the oil reservoir is hidden inside the pump body. The brake lever and the pump body are connected and driven by a brake cable. This allows the disc brake and brake lever to be adjusted significantly according to the needs of the vehicle structure. The internally hidden pump body is not affected by changes in the external structure, thus improving the overall versatility and user experience.

[0007] Preferably, in the above-described cable-operated hydraulic disc brake mechanism, a piston chamber is provided on the lower side of the oil reservoir, and a piston rod is provided inside the piston chamber. The oil reservoir, the piston chamber, and the oil pipe are connected in sequence.

[0008] The piston rod is used to connect to the brake cable, thus enabling the hydraulic disc brake function. The reservoir is used to store brake fluid, playing a role in closed-loop circulation and thermal expansion management, thereby improving the stability of hydraulic pressure.

[0009] Preferably, in the above-described cable-operated hydraulic disc brake mechanism, a piston spring is provided on the rear side of the piston rod, and a cup seal is provided on the front side of the piston rod.

[0010] The spring portion of the piston spring is used for piston rod return, and the piston portion of the piston spring is used for connection to the brake cable. The piston cup seal is used to install the piston cup seal ring in the oil reservoir to achieve a sealing function, thereby generating oil pressure when the piston rod moves.

[0011] Preferably, in the above-described cable-operated hydraulic disc brake mechanism, the oil reservoir is provided with an oil cup cover, the piston chamber is provided with a flat washer, and a high-pressure connector is provided between the piston chamber and the oil pipe.

[0012] The brake fluid reservoir cap improves the convenience of regular maintenance. Removing the cap allows for adding or replacing brake fluid, or for bleeding the system to remove air from the brake lines. Flat washers enhance structural stability. High-pressure connectors, by improving structural stability, ensure stable hydraulic pressure.

[0013] Preferably, in the above-described cable-operated hydraulic disc brake mechanism, the diameter of the oil passage hole between the oil reservoir and the piston chamber is 2.5mm to 3.5mm.

[0014] The diameter of the oil passage is designed to ensure the stability of the oil pressure.

[0015] Preferably, in the above-described cable-operated hydraulic disc brake mechanism, the pump body is further provided with an upper pump section, the brake cable is connected to the pump body through the upper pump section, and the upper pump section is provided with an upper pump cover.

[0016] The upper pump section is used to constrain and fix the brake cable, making the connection between the brake cable and the piston rod more stable. The upper pump cover serves a protective function, preventing foreign objects from falling in and obstructing the movement of the piston rod.

[0017] Preferably, in the above-described cable-operated hydraulic disc brake mechanism, an adjusting nut is provided inside the brake cable.

[0018] The adjusting nut is used to adjust the length of the brake cable to prevent the brake cable from deforming after long-term use, which would lead to a longer cable travel and a decrease in braking performance.

[0019] Preferably, in the above-described cable-operated hydraulic disc brake mechanism, a CBS linkage brake unit is provided between the disc brake unit and the oil pipe.

[0020] The CBS (Combined Braking System) is used to achieve coordinated braking of the front and rear wheels, rationally distributing braking force between them. This improves braking efficiency while ensuring riding safety, enhances braking response sensitivity during riding, reduces the overall braking distance of the vehicle, and improves braking reliability.

[0021] Preferably, in the above-described cable-operated hydraulic disc brake mechanism, the brake handle is provided with an aluminum rear shell and a movable pin, and the brake handle is fixed to the aluminum rear shell by the movable pin.

[0022] The brake lever and aluminum rear cover are smoothly assembled, improving the user experience. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a partial structural diagram of the pump body of this utility model;

[0025] Figure 3 for Figure 2 Cross-sectional view along the AA direction;

[0026] Figure 4 for Figure 2 Cross-sectional view along the BB direction.

[0027] Reference numerals: 1. Brake handle; 2. Oil pipe; 3. Pump body; 4. Disc brake unit; 11. Brake cable; 31. Oil reservoir; 32. Piston chamber; 33. Piston rod; 34. Piston spring unit; 35. Leather cup seal; 36. Oil cup cover; 37. Flat washer; 38. High-pressure connector; 39. Upper pump unit; 39. Upper pump cover; 391. Adjusting nut; 12. CBS linkage brake unit; 41. Aluminum rear shell; 13. Movable pin; 14. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-4 The present invention will be further described in detail with reference to specific embodiments, but these are not intended to limit the present invention: Example

[0029] A cable-operated hydraulic disc brake mechanism includes a brake handle 1, an oil pipe 2, a pump body 3, and a disc brake unit 4. A brake cable 11 is provided between the brake handle 1 and the pump body 3. The brake handle 1 and the pump body 3 are connected through the brake cable 11. An oil storage chamber 31 is provided inside the pump body 3. The pump body 3 and the disc brake unit 4 are connected through the oil pipe 2.

[0030] Preferably, a piston chamber 32 is provided on the lower side of the oil storage chamber 31, and a piston rod 33 is provided in the piston chamber 32. The oil storage chamber 31, the piston chamber 32, and the oil pipe 2 are connected in sequence.

[0031] Preferably, a piston spring portion 34 is provided on the rear side of the piston rod 33, and a leather cup sealing portion 35 is provided on the front side of the piston rod 33.

[0032] Preferably, the oil storage chamber 31 is provided with an oil cup cover 36, the piston chamber 32 is provided with a flat washer 37, and a high-pressure connector 38 is provided between the piston chamber 32 and the oil pipe 2.

[0033] Preferably, the diameter of the oil passage hole in the oil storage chamber 31 and the piston chamber 32 is 2.5mm to 3.5mm.

[0034] Preferably, the pump body 3 is further provided with an upper pump section 39, the brake line 11 is connected to the pump body 3 through the upper pump section 39, and the upper pump section 39 is provided with an upper pump cover 391.

[0035] Preferably, an adjusting nut 12 is provided inside the brake line 11.

[0036] Preferably, a CBS linkage brake unit 41 is provided between the disc brake unit 4 and the oil pipe 2.

[0037] Preferably, the brake handle 1 is provided with an aluminum rear shell 13 and a movable pin 14, and the brake handle 1 is fixed to the aluminum rear shell 13 by the movable pin 14.

[0038] The diameter of the oil passage hole can be 2.5mm, 3mm, or 3.5mm.

[0039] like Figure 1-4 As shown, the brake lever 1 includes a left lever and a right lever, and the disc brake unit 4 includes a front disc brake and a rear disc brake. The brake lever 1 is connected to the piston spring part 34 of the piston rod 33 via the brake cable 11, the upper pump part 39, and the brake spring part 34. When braking, when the brake lever 1 pulls the brake cable 11, the piston spring part 34 and the piston cup seal part 35 are pulled together, squeezing the brake fluid in the piston chamber 32. The generated oil pressure is connected to the CBS linkage brake unit 41 through the high-pressure connector 38, and then to the disc brake unit 4. When braking ends, the piston spring part 34 returns to its original position by the spring.

[0040] The brake handle 1 can be designed with a groove at the bottom, and the head of the brake cable 11 can be a Ф5.8*10 cylindrical pull head. The brake handle 1 can be equipped with a cable groove, and the brake cable 11 can run inside the aluminum back cover 13 to achieve an internal cable routing effect. The adjustment range of the adjusting nut 12 can be 9mm to 11mm, such as 9mm, 10mm, and 11mm.

[0041] The piston spring section 34 can be designed with a concave groove, and the brake line 11 can be designed with a convex groove, allowing them to fit together. To prevent the connection from coming loose, an M8*8 knurled nut can be added for fixation, ensuring a stable and reliable assembly structure between the piston spring section 34 and the brake line 11. The two sides of the upper pump section 39 can be hollowed out to facilitate personnel operation and assembly.

[0042] The pump body 3 is internally divided into upper and lower chambers. The upper chamber is an oil reservoir 31 to ensure stable oil pressure, while the lower chamber is divided into two piston chambers 32. The oil reservoir 31 and piston chamber 32 are connected by a Ф3mm oil passage hole. The upper pump cover 391 is fixed to the upper pump part 39 with M4 Phillips head screws. The pump body 3 is connected to the CBS linkage brake unit 41 through two high-pressure connectors 38.

[0043] Since the oil reservoir 31 is not on the brake handle 1, the brake handle 1 can be significantly redesigned, improving its overall versatility and user experience.

[0044] In summary, the above description is only a preferred embodiment of the present utility model. All equivalent changes and modifications made within the scope of the patent application of the present utility model shall be covered by the present utility model.

Claims

1. A cable-operated hydraulic disc brake mechanism, comprising a brake handle (1), an oil pipe (2), a pump body (3), and a disc brake unit (4), characterized in that: A brake cable (11) is provided between the brake handle (1) and the pump body (3). The brake handle (1) and the pump body (3) are connected through the brake cable (11). An oil storage chamber (31) is provided inside the pump body (3). The pump body (3) and the disc brake part (4) are connected through the oil pipe (2).

2. The cable-operated hydraulic disc brake mechanism according to claim 1, characterized in that: A piston chamber (32) is provided on the lower side of the oil storage chamber (31), and a piston rod (33) is provided in the piston chamber (32). The oil storage chamber (31), the piston chamber (32), and the oil pipe (2) are connected in sequence.

3. The cable-operated hydraulic disc brake mechanism according to claim 2, characterized in that: A piston spring part (34) is provided on the rear side of the piston rod (33), and a leather cup sealing part (35) is provided on the front side of the piston rod (33).

4. The cable-operated hydraulic disc brake mechanism according to claim 2, characterized in that: The oil storage chamber (31) is provided with an oil cup cover (36), the piston chamber (32) is provided with a flat washer (37), and a high-pressure connector (38) is provided between the piston chamber (32) and the oil pipe (2).

5. A cable-operated hydraulic disc brake mechanism according to claim 2, characterized in that: The diameter of the oil passage in the oil storage chamber (31) and the piston chamber (32) is 2.5 mm to 3.5 mm.

6. The cable-operated hydraulic disc brake mechanism according to claim 1, characterized in that: The pump body (3) is also provided with an upper pump section (39), the brake line (11) is connected to the pump body (3) through the upper pump section (39), and the upper pump section (39) is provided with an upper pump cover (391).

7. The cable-operated hydraulic disc brake mechanism according to claim 1, characterized in that: An adjusting nut (12) is provided inside the brake line (11).

8. The cable-operated hydraulic disc brake mechanism according to claim 1, characterized in that: A CBS linkage brake unit (41) is provided between the disc brake unit (4) and the oil pipe (2).

9. A cable-operated hydraulic disc brake mechanism according to claim 1, characterized in that: The brake handle (1) is provided with an aluminum back cover (13) and a movable pin (14). The brake handle (1) and the aluminum back cover (13) are fixed by the movable pin (14).

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