Brake Pad Return Band Spring With Stable Contact Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing disc brake systems face issues with maintaining the correct positioning of the spring-pad contact point under external biases, leading to altered dynamics and functionality due to sliding forces exceeding friction forces.
Innovation Solution
A band spring design with specific geometric modifications, including a third abutment portion that prevents sliding by engaging with a striker portion of the brake pad, ensuring the spring-pad contact point remains stable under external biases, and avoiding permanent engagement with the pad to maintain optimal functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the spring relies on friction forces to maintain positioning, then the system is simpler, but the positioning stability deteriorates under external biases
Solution Approach 1:
The patent introduces an abutment portion as an intermediary mechanical element between the spring and brake pad. This abutment portion engages with a corresponding feature on the brake pad to provide positive mechanical positioning, replacing the reliance on friction forces alone. The intermediary structure ensures stable contact point positioning under external biases while maintaining system simplicity.
2Force
If the spring abuts against the apical portion of the pads, then the distancing force is direct, but the contact point position becomes unstable under external forces
Solution Approach 1:
The patent segments the spring structure into distinct functional portions: a thrust portion that applies distancing force to the brake pad, and a separate abutment portion that provides stable positioning. This segmentation allows the thrust portion to maintain direct force transmission while the abutment portion independently ensures contact point stability through positive mechanical engagement.
3Stability of the object's composition
If the spring is permanently engaged with the pad, then the positioning is stable, but the functionality is compromised
Solution Approach 1:
The patent implements a dynamic engagement system where the abutment portion provides stable positioning during normal operation through mechanical engagement, but allows for controlled disengagement when needed. The geometry of the abutment and corresponding pad feature enables the spring to maintain its position under external biases while still permitting functional movement and pad replacement.
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 minimizes sliding forces while maximizing contact forces, maintaining the spring's functionality and preventing bias-induced positional changes, thus ensuring consistent braking performance and progressive wear gap creation.
Implementation Method 1
a band spring (1) shaped to be arranged straddling a brake disc (2) to apply an elastic action on at least one brake pad (3) to bias it away from said brake disc (2)
Implementation Method 2
The value of these frictional forces depends on: the materials in contact which define the friction coefficient
Data Source
AI summary
A band spring arranged straddling a brake disc to apply an elastic action on a brake pad to bias the brake pad away from the brake disc is provided. The brake pad has a backing plate supporting friction material and having a plate edge forming at least one thrust portion and at least one striker portion. The band spring has a band-shaped spring body and three portions, at least two of which mutually distinct, namely a first coupling portion coupling the band spring to a caliper body, a second thrust portion applying an elastic action on the at least one thrust portion and a third abutment portion forming a support that prevents sliding of the second thrust portion when the band spring is subject to external actions, the third abutment portion, when abutting against the striker portion being biased by a peak or buckling load, avoiding that the band spring permanently couples with the brake pad.