A hydraulic disc brake structure for mountain bikes

Abstract

This utility model provides a hydraulic disc brake structure for mountain bikes, belonging to the technical field of bicycle braking equipment. This utility model includes a front brake adjustment mechanism and a rear brake pad fixing mechanism; the front brake adjustment mechanism includes a brake lever, a piston push rod, an adjusting rolling nut, an adjusting rolling nut bracket, and a hydraulic pan assembly. One end of the piston push rod is connected to the brake lever, and the other end extends into the hydraulic pan assembly. The piston push rod has a trapezoidal threaded section, and the adjusting rolling nut is threadedly engaged with the trapezoidal threaded section. The adjusting rolling nut bracket is fixed to the outside of the hydraulic pan assembly, and the adjusting rolling nut is rotatably mounted on the adjusting rolling nut bracket.

Description

Technical Field

[0001] This utility model belongs to the technical field of bicycle braking equipment, and relates to a hydraulic disc brake structure for mountain bikes. Background Technology

[0002] Mountain bikes are a common tool for outdoor travel and sports, and the safety and convenience of their braking system directly affect the riding experience and personal safety. Currently, mainstream hydraulic disc brake systems for mountain bikes have two major drawbacks: First, when brake fluid pressure is insufficient due to evaporation or other reasons, special tools such as screwdrivers are needed to loosen screws to adjust the pressure, which is cumbersome and cannot be adjusted promptly in emergencies, posing a safety hazard. Second, when brake pads wear out, replacement requires disassembling the entire brake mechanism and using various auxiliary tools, which is time-consuming and laborious, especially inconvenient in outdoor riding scenarios. Furthermore, traditional brake pad connectors are mostly single-use, resulting in waste and increased operating costs.

[0003] Therefore, there is an urgent need for a mountain bike hydraulic disc brake system that can quickly adjust hydraulic pressure and facilitate brake pad replacement, in order to overcome the shortcomings of existing technology. Summary of the Invention

[0004] The purpose of this invention is to address the above problems by proposing a hydraulic disc brake structure for mountain bikes, which enables quick adjustment of hydraulic pressure and convenient replacement of brake pads without tools, thereby improving riding safety and maintenance convenience.

[0005] The objective of this utility model can be achieved through the following technical solutions: A hydraulic disc brake structure for a mountain bike is characterized by comprising a front brake adjustment mechanism and a rear brake pad fixing mechanism. The front brake adjustment mechanism includes a brake lever, a piston push rod, an adjusting rolling nut, an adjusting rolling nut bracket, and a hydraulic pan assembly. One end of the piston push rod is connected to the brake lever, and the other end extends into the hydraulic pan assembly. The piston push rod has a trapezoidal threaded section, and the adjusting rolling nut is threadedly engaged with the trapezoidal threaded section. The adjusting rolling nut bracket is fixed to the outside of the hydraulic pan assembly, and the adjusting rolling nut is rotatably mounted on the adjusting rolling nut bracket.

[0006] In the aforementioned hydraulic disc brake structure for a mountain bike, the rear brake pad fixing mechanism includes a brake body, a brake pad, and a snap-fit ​​fixing component. The brake body has a brake pad mounting groove, and the brake pad is fitted and installed in the mounting groove. The snap-fit ​​fixing component includes a snap-fit ​​rod, a snap-fit ​​ring, and a snap-fit ​​fixing seat. The snap-fit ​​fixing seat is located on the brake body, and the snap-fit ​​rod and the snap-fit ​​ring engage to detachably fix the brake pad in the mounting groove.

[0007] In the aforementioned hydraulic disc brake structure for a mountain bike, the piston push rod is provided with a stop device in the middle to limit the piston push rod from rotating synchronously with the adjusting rolling nut.

[0008] In the aforementioned hydraulic disc brake structure for a mountain bike, the parameters of the trapezoidal thread section of the piston push rod are: pitch 1mm, pitch diameter 3.6mm, thread angle 30°, minor thread diameter 3mm, major thread diameter 4.2mm, working thread height 1.2mm, and 5 bearing thread turns.

[0009] In the aforementioned hydraulic disc brake structure for a mountain bike, the piston rod is made of 45CrMnTi steel.

[0010] In the aforementioned hydraulic disc brake structure for a mountain bike, the buckle rod, buckle ring, and buckle fixing seat of the buckle-type fixing component are all made of liquid crystal polymer (LCP).

[0011] In the above-mentioned hydraulic disc brake structure for mountain bikes, the hydraulic pan assembly includes a hydraulic pan, a hydraulic seal piston, a drain seal, and a hydraulic seal nut. The hydraulic pan has a cavity for containing brake fluid. The hydraulic seal piston and piston push rod are arranged correspondingly. The drain seal is located at the mating point between the hydraulic pan and the hydraulic seal piston.

[0012] In the aforementioned hydraulic disc brake structure for a mountain bike, the rear brake pad fixing mechanism further includes a brake spring, which is located on one side of the brake pad and is made of 50CrVA steel.

[0013] In the aforementioned hydraulic disc brake structure for a mountain bike, the outer diameter of the adjusting rolling nut is adapted to the size for operation by a rider wearing gloves.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) This utility model sets a piston push rod with trapezoidal thread and an adjusting rolling nut in the front brake adjustment mechanism, and with the stop device, when the brake fluid is insufficient, the rider does not need to use any tools. He can push the piston push rod forward by rotating the adjusting rolling nut to quickly compress the oil and increase the oil pressure, thereby achieving instant braking. This effectively eliminates the safety hazards caused by insufficient oil pressure in emergency situations. The operation is convenient and the response is rapid.

[0015] (2) The rear brake pad fixing mechanism adopts a snap-on fixing component. When replacing the brake pad, you only need to pull off the engagement of the snap ring and the snap rod to directly remove the old brake pad, install the new brake pad, and then re-clamp the snap. There is no need to disassemble the entire braking system or wheel. The operation is simple and quick. The snap-on fixing component can be reused, reducing the cost of use. It is especially suitable for outdoor cycling scenarios.

[0016] (3) The structure of this utility model is reasonable and the materials of each component are scientifically selected. Through finite element analysis, it is verified that the adjusting rolling nut bracket does not have obvious deformation when subjected to the ultimate gripping force of 150KGF. The snap-on fixing component is made of LCP material, which has strong stability and durability. The overall structure is lightweight and has low manufacturing cost, which is in line with the concept of green manufacturing and has broad application prospects. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 Schematic diagram of the front brake adjustment mechanism; Figure 3 A schematic diagram of the first structure of the rear brake pad fixing mechanism; Figure 4 A schematic diagram of the second structure of the rear brake pad fixing mechanism; In the diagram, 1. Front brake adjustment mechanism; 2. Rear brake pad fixing mechanism; 3. Brake lever; 4. Piston push rod; 5. Adjusting rolling nut; 6. Adjusting rolling nut bracket; 7. Oil pan assembly; 8. Brake body; 9. Brake pad; 10. Brake pad mounting slot; 11. Clip rod; 12. Clip ring; 13. Clip fixing seat. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1 As shown, the hydraulic disc brake structure of this mountain bike includes a front brake adjustment mechanism 1 and a rear brake pad fixing mechanism 2.

[0020] like Figure 2 As shown, the front brake adjustment mechanism includes a brake lever 3, a piston push rod 4, an adjusting rolling nut 5, an adjusting rolling nut bracket 6, and an oil pan assembly 7. One end of the piston push rod is connected to the brake lever for transmission, and the other end extends into the oil pan assembly. The piston push rod is provided with a trapezoidal thread section, and the adjusting rolling nut is threadedly engaged with the trapezoidal thread section. The adjusting rolling nut bracket is fixed to the outside of the oil pan assembly, and the adjusting rolling nut is rotatably mounted on the adjusting rolling nut bracket. A stop device is provided in the middle of the piston push rod to limit the synchronous rotation of the piston push rod with the adjusting rolling nut.

[0021] like Figure 3 and Figure 4As shown, the rear brake pad fixing mechanism includes a brake body 8, a brake pad 9, and a snap-fit ​​fixing assembly. The brake body is provided with a brake pad mounting groove 10, and the brake pad is fitted and installed in the mounting groove. The snap-fit ​​fixing assembly includes a snap-fit ​​rod 11, a snap-fit ​​ring 12, and a snap-fit ​​fixing seat 13. The snap-fit ​​fixing seat is located on the brake body, and the snap-fit ​​rod and the snap-fit ​​ring engage to detachably fix the brake pad in the mounting groove.

[0022] The parameters for the trapezoidal thread section of the piston push rod are: pitch 1mm, pitch diameter 3.6mm, thread angle 30°, minor diameter 3mm, major diameter 4.2mm, working height 1.2mm, and 5 load-bearing thread turns. These parameters ensure that the trapezoidal thread has good transmission capacity and self-locking performance, and can withstand large axial loads.

[0023] The piston push rod is made of 45CrMnTi steel. This material has high strength and good toughness, which can meet the mechanical requirements during braking.

[0024] The snap-fit ​​fastening assembly's snap-fit ​​rod, snap-fit ​​ring, and snap-fit ​​mounting base are all made of liquid crystal polymer (LCP). This material is resistant to high and low temperatures, has high strength, is vibration-resistant, and is chemically resistant, making it suitable for complex outdoor environments and easy to injection mold.

[0025] The brake fluid pan assembly includes a brake fluid pan, a brake seal piston, a drain seal, and a brake seal nut. The brake fluid pan has a cavity for containing brake fluid. The brake seal piston and piston push rod are correspondingly arranged, and the drain seal is located at the mating point between the brake fluid pan and the brake seal piston. This ensures the brake fluid pan is airtight and prevents brake fluid leakage.

[0026] The rear brake pad fixing mechanism also includes a brake spring, which is located on one side of the brake pad and is made of 50CrVA steel. This ensures that the brake pad can quickly rebound and return to its original position after braking.

[0027] The adjustable rolling nut has an outer diameter suitable for riders wearing gloves. It can be adjusted without tools, enhancing ease of use.

[0028] When insufficient brake fluid causes a drop in oil pressure, the rider can directly rotate the adjusting nut by hand (even while wearing cycling gloves) without the need for tools. Because the adjusting nut is threaded into the trapezoidal thread section of the piston push rod, and the piston push rod is restricted from rotating by a stop device, rotating the adjusting nut will drive the piston push rod to move axially into the oil pan assembly, squeezing the brake fluid in the oil pan and quickly increasing the oil pressure. This ensures the braking effectiveness of the braking system and avoids the risk of being unable to brake due to insufficient oil pressure in an emergency.

[0029] When brake pads wear out and need to be replaced, riders simply need to pull off the clip ring and remove the clip lever to take the old brake pads out of the brake pad mounting slot. Then, they can place the new brake pads into the mounting slot, insert the clip lever, and snap the clip ring into place to complete the brake pad replacement. The entire process does not require disassembling the brake caliper or wheel, making it simple and quick to operate. Furthermore, the clip-on fixing components are reusable, reducing operating costs.

[0030] It should be understood that in the claims and description of this utility model, all instances of "comprising..." should be understood as having an open meaning, that is, their meaning is equivalent to "containing at least...", and should not be understood as having a closed meaning, that is, their meaning should not be understood as "containing only...".

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A hydraulic disc brake structure for a mountain bike, characterized in that: It includes a front brake adjustment mechanism and a rear brake pad fixing mechanism; the front brake adjustment mechanism includes a brake lever, a piston push rod, an adjusting rolling nut, an adjusting rolling nut bracket, and an oil pan assembly. One end of the piston push rod is connected to the brake lever, and the other end extends into the oil pan assembly. The piston push rod is provided with a trapezoidal thread section. The adjusting rolling nut is threadedly engaged with the trapezoidal thread section. The adjusting rolling nut bracket is fixed to the outside of the oil pan assembly, and the adjusting rolling nut is rotatably mounted on the adjusting rolling nut bracket.

2. The hydraulic disc brake structure for a mountain bike according to claim 1, characterized in that: The rear brake pad fixing mechanism includes a brake body, a brake pad, and a snap-fit ​​fixing component. The brake body has a brake pad mounting groove, and the brake pad is fitted and installed in the mounting groove. The snap-fit ​​fixing component includes a snap-fit ​​rod, a snap-fit ​​ring, and a snap-fit ​​fixing seat. The snap-fit ​​fixing seat is located on the brake body, and the snap-fit ​​rod and the snap-fit ​​ring engage to detachably fix the brake pad in the mounting groove.

3. The hydraulic disc brake structure for a mountain bike according to claim 1, characterized in that: The piston rod is provided with a stop device in the middle to limit the piston rod from rotating synchronously with the adjusting rolling nut.

4. The hydraulic disc brake structure for a mountain bike according to claim 1, characterized in that: The parameters of the trapezoidal thread section of the piston push rod are as follows: pitch 1mm, pitch diameter 3.6mm, thread angle 30°, minor thread diameter 3mm, major thread diameter 4.2mm, working height of thread 1.2mm, and number of bearing thread turns 5.

5. The hydraulic disc brake structure for a mountain bike according to claim 1, characterized in that: The piston rod is made of 45CrMnTi steel.

6. The hydraulic disc brake structure for a mountain bike according to claim 2, characterized in that: The buckle rod, buckle ring, and buckle fixing seat of the buckle-type fixing assembly are all made of liquid crystal polymer (LCP).

7. The hydraulic disc brake structure for a mountain bike according to claim 1, characterized in that: The oil pan assembly includes an oil pan, an oil seal piston, a drain seal, and an oil seal nut. The oil pan has a cavity for containing brake fluid. The oil seal piston and piston push rod are arranged correspondingly. The drain seal is located at the mating point between the oil pan and the oil seal piston.

8. The hydraulic disc brake structure for a mountain bike according to claim 2, characterized in that: The rear brake pad fixing mechanism also includes a brake spring, which is located on one side of the brake pad and is made of 50CrVA steel.

9. The hydraulic disc brake structure for a mountain bike according to claim 1, characterized in that: The outer diameter of the adjustable rolling nut is adapted to the size for operation by a cyclist wearing gloves.

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