Cable-Free Bicycle Braking Device with Pivoting Tire Contact
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Solution Overview
Problem
Conventional bicycle brakes with cables inhibit freestyle tricks and are prone to damage from high forces and crashes during freestyle riding, making them impractical for controlling speed and stopping.
Innovation Solution
A cable-free braking device with a pivotally connected extended contact surface that rotates to make frictional contact with the tire, utilizing a biasing device and a replaceable brake pad made of materials like copper or ceramic for durability and high friction, allowing control over speed without tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional cable-based brake systems are used, then braking function is provided, but the cables inhibit freestyle tricks and are prone to damage from high forces and crashes
Solution Approach 1:
The patent removes the cable mechanism from the brake system entirely. The brake lever is directly connected to the brake caliper assembly without cables, eliminating the component that interferes with handlebar rotation and tricks while maintaining the braking function.
Solution Approach 2:
The brake system uses a pivotable caliper assembly that can rotate between a retracted position (away from the tire) and an engaged position (contacting the tire). This dynamic positioning allows the brake to adapt between trick performance (retracted) and braking (engaged), improving both versatility and reliability.
2Ease of operation
If cable-based brakes are used, then speed control is achieved, but the cables are damaged by high forces and crashes during freestyle riding
Solution Approach 1:
The brake system is divided into modular components: a fixed brake lever, a pivotable caliper assembly, and replaceable brake pads. This segmentation allows the vulnerable cable to be completely removed while maintaining speed control through direct mechanical linkage, and enables easy replacement of worn brake pads without replacing the entire system.
Solution Approach 2:
The brake pads are designed to be pre-positioned on the caliper assembly and can be quickly replaced without tools. This preliminary preparation of replaceable components ensures that maintenance can be performed rapidly in the field, minimizing downtime and ensuring continued operability.
3Reliability
If traditional brake systems are used, then stopping function is provided, but they are impractical for controlling speed during freestyle tricks
Solution Approach 1:
The caliper assembly is designed to pivot on an axis, allowing it to dynamically transition between a retracted position that clears the tire for tricks and an engaged position that provides braking force. This dynamic adaptability enables the same device to reliably support both freestyle maneuvers and speed control.
Solution Approach 2:
Instead of having the brake pads move toward the tire through cable tension, the caliper assembly itself pivots to bring the pads into contact with the tire. This inverted mechanism eliminates the need for cables and allows the brake to be positioned optimally for both trick performance and braking effectiveness.
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
Enables reliable speed control and stopping during freestyle riding, withstanding high forces and crashes while minimizing tire damage and requiring no tool-based maintenance.
Implementation Method 1
pressing on the braking device with a foot or other body part causes components of the braking device to rotate, and make frictional contact with the tire
Data Source
AI summary
A bicycle braking device and associated methods are disclosed. In one example, the bicycle braking device includes an elongated contact surface for actuation by a user, where the elongated contact surface can be pressed against a bicycle tire to slow or stop the bicycle. In selected examples, the bicycle braking device includes a replaceable brake pad with high friction and wear properties.