Bicycle Brake Caliper Pad Biasing to Prevent Rattle
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Solution Overview
Problem
Bicycles, especially mountain and gravel bicycles, experience rattling of brake pads due to jolts and vibrations on rough terrain, which can be annoying and give the impression of improper brake adjustment.
Innovation Solution
A brake caliper design that includes a biasing member to restrict the movement of the brake pad within the caliper, either by biasing it against an inner surface, a housing wall, or using resilient materials to maintain contact in both braking and non-braking positions, thereby reducing or preventing rattling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the brake pad is allowed to move freely within the caliper, then the brake system maintains simplicity and ease of operation, but the brake pad rattles during vibration and jolts on rough terrain
Solution Approach 1:
The biasing member applies a preliminary biasing force to the brake pad in the non-braking position, creating a pre-compression that prevents the brake pad from moving and rattling during vibration and jolts before the harmful motion occurs
Solution Approach 2:
The biasing member provides dynamic adaptation by allowing the brake pad to move from the non-braking position to the braking position when force is applied, while maintaining a biased contact in the non-braking position to prevent rattling, thus adapting to different operational states
2Object-affected harmful factors
If a biasing member is added to prevent brake pad movement, then brake pad rattling is reduced or eliminated, but the device complexity increases
Solution Approach 1:
The biasing member changes the positional parameter of the brake pad by applying a biasing force that maintains contact between the brake pad and the first housing wall, transforming the brake pad from a freely moving component to one with constrained movement in the non-braking position
Solution Approach 2:
The biasing member acts as an intermediary element between the brake pad and the first housing wall, transmitting a biasing force that prevents direct contact and potential rattling between the brake pad and other caliper components
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 solution effectively reduces or eliminates brake pad rattling, enhancing the rider's experience by ensuring a quieter and more stable brake system.
Implementation Method 1
a biasing member configured to bias the brake pad in a downstream direction within the housing with the brake pad is in the non-braking position
Data Source
AI summary
A brake caliper for a bicycle includes a housing configured to be installed on the bicycle, the bicycle including a disc attached to a wheel of the bicycle. A brake pad is installed within the housing and is configured to move between a braking position and a non-braking position. The braking position is a location within the housing where the brake pad contacts the disc when the housing is installed on the bicycle. The non-braking position is a location within the housing where the brake pad is further from the disc than in the braking position. The caliper also includes a biasing member configured to bias the brake pad in a downstream direction within the housing with the brake pad is in the non-braking position, the downstream direction being parallel to a direction of rotation of the disc when a wheel of the bicycle is rotating to move the bicycle forward.