Brake Pad Band Spring Assembly With Stable Contact Positioning
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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.
Innovation Solution
A band spring design with specific geometric modifications, including a third abutment portion that prevents sliding and maintains contact force, ensuring the spring-pad contact point remains stable despite external forces, achieved through industrial processes like blanking and bending.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the spring relies on friction forces to maintain positioning, then the system is simpler in structure, but the positioning stability deteriorates under external forces
Solution Approach 1:
The patent introduces a pin as an intermediary element between the spring and pad. The pin passes through both components and is retained by a retaining ring, creating a mechanical intermediary that transfers and stabilizes the positioning force. This mediator prevents direct reliance on friction between spring and pad, solving the contradiction by providing stable positioning without complex adjustment mechanisms.
2Force
If the spring abuts against the apical portion of the pads, then the spring can transmit distancing force effectively, but the contact point position changes under external forces
Solution Approach 1:
The patent moves the interaction from a single-point contact (apical portion) to a distributed contact along the pin axis. The pin creates a new dimensional constraint that prevents lateral movement of the contact point while allowing the spring to maintain its distancing function. This dimensional change stabilizes the contact point position without compromising force transmission.
3Device complexity
If friction forces are used to maintain spring-pad balance, then the system requires fewer components, but external forces disrupt the balance
Solution Approach 1:
The patent utilizes the cylindrical geometry of the pin to provide rotational symmetry and stable contact. The circular cross-section of the pin allows it to resist forces from any direction while maintaining consistent contact with both the spring and pad. This curved geometry provides inherent stability against external forces without requiring complex balancing mechanisms.
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 optimal functionality and preventing wear-induced bias, ensuring consistent braking performance without affecting the spring's behavior.
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 a distinct striker portion. The band spring has a band-shaped spring body and at least three portions 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 abutting against the striker portion forming a support that prevents sliding of the second thrust portion when the band spring is subject to external actions, preventing the band spring from permanently coupling with the brake pad, avoiding bilateral constraint in the second thrust portion and third abutment portion between the band spring and the brake pad.