Multi-Rod Disc Brake Linkage for Even Pad Engagement
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Solution Overview
Problem
Conventional bicycle disc brakes face issues with uneven engagement and wear due to asymmetrical clamp arms, leading to noisy operation and reduced effectiveness in stopping the bicycle quickly.
Innovation Solution
A multiple-rod disc brake design featuring a locking structure with symmetrical bases, swing arms, wear-resistant sleeves, and pistons, where the brake cable actuates a connection rod to drive the swing arm and piston for efficient engagement with the stop disc, utilizing a multiple-rod structure and resilient elements to ensure even and quick braking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional brake shoe with two symmetrical clamp arms is used, then the brake structure is simple, but the brake arms cannot engage the wheel rim evenly, causing noisy operation and excessive wear
Solution Approach 1:
The brake shoe is divided into two separate brake pads, each independently mounted on its own clamp arm. This segmentation allows each pad to be adjusted and engaged independently with the wheel rim, ensuring even contact and distributing the braking force uniformly, thereby reducing noise and wear on individual components.
Solution Approach 2:
Each brake pad is equipped with its own adjustment mechanism and mounting structure, allowing local optimization of the engagement quality. The clamp arms are designed with specific geometric features that ensure proper alignment and contact distribution, addressing the uneven engagement problem at the local level rather than relying on overall symmetry.
2Reliability
If a clamp structure with two pads and oval orifice is used, then the pads are retained and cannot rotate, but the structure cannot stop the bicycle easily
Solution Approach 1:
The clamp arms are designed to be swingable about horizontal axes, transforming the static clamp structure into a dynamic one. This allows the brake pads to automatically adjust their position and angle during braking, improving contact with the wheel rim and making the brake more responsive and easier to operate, while the oval orifice retains the pads to prevent rotation.
3Productivity
If conventional brake mechanisms are used, then the structure is relatively simple, but the braking force is insufficient to stop the bicycle quickly
Solution Approach 1:
The brake mechanism utilizes a three-dimensional swing arm configuration that allows the brake pads to engage the wheel rim from multiple angles simultaneously. This spatial arrangement increases the effective braking surface area and distributes the braking force more efficiently, achieving faster stopping speeds without requiring a proportionally complex structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design enables the bicycle to be stopped easily and quickly by ensuring even engagement of the brake pads with the wheel, reducing noise and wear, and providing a reliable braking mechanism.
Implementation Method 1
a resilient element (14) connected to a second end of the connection rod (11)
Implementation Method 2
the brake cable actuates a connection rod to drive the swing arm and piston for efficient engagement with the stop disc
Data Source
Figure 1
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AI summary
A multi-rod disc brake contains: a brake unit (B) including a locking structure (20), and the locking structure (20) has two symmetrical bases (24), two symmetrical swing arms (21), two symmetrical wear resistant sleeves (26), and two symmetrical pistons (25). An accommodation chamber is defined between the two pistons (25) to accommodate a stop disc (D). A drive unit (A) includes a multiple-rod structure (10), and a second rotary shaft (22) is rotatably connected with a second screw bolt (131) which is rotatably connected with a connecting portion (13) of a connection rod (11), and the connection rod (11) is rotatably connected with a respective third rotary shaft (12) of two third rotary shafts (12). The respective third rotary shaft (12) has a second locating orifice (121) connected with a first extension (152) of a first joining cable (15) or a second extension (162) of a second joining cable (16). Each of the first extension (152) and the second extension (162) is connected with a resilient element (14), the first joining cable (15) has a first receiving orifice (151), and the second joining cable (16) has a second receiving orifice (161), such that a brake cable (L) is inserted through the first receiving orifice (151) and the second receiving orifice (161) to be fixed by a fixing element (L1).