Disc Brake Adjuster Wrap Spring for Stable Spindle Torque
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing disc brake adjustment mechanisms face issues with excessive friction, leading to torque peaks and reduced service life due to variations in frictional resistance during brake application and release, which can cause unwanted rotation and overheating.
Innovation Solution
An additional wrap spring device is integrated into the brake adjuster, designed to provide a defined resisting torque during brake release and minimize frictional fluctuations, acting as a freewheel spring when the brake is applied and locking when released to prevent unwanted spindle rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If friction devices are used to prevent unwanted rotation of the adjustment spindle, then reliability is improved, but torque peaks occur that can restrict adjustment spindle rotation during brake application
Solution Approach 1:
The patent applies a dynamic friction device where the frictional resistance is not constant but varies with operating conditions. The friction device is designed to provide high frictional resistance only when needed (during brake release to prevent unwanted rotation) while allowing smooth operation during brake application. This dynamic behavior resolves the contradiction by making the friction characteristic adaptive rather than fixed.
Solution Approach 2:
The invention changes the friction parameter from a constant value to a variable value that depends on the operational state. By using a friction device that provides defined frictional resistance only during specific phases (brake release), the system achieves reliable prevention of unwanted rotation without creating excessive torque peaks during brake application when adjustment is needed.
2Reliability
If additional friction elements are added to control rotation, then torque control is improved, but device complexity increases
Solution Approach 1:
The patent makes the existing friction device multi-functional by designing it to serve both as a rotation prevention mechanism during brake release and as a controlled friction element during brake application. Instead of adding separate friction elements for each function, the single friction device performs multiple functions, thereby improving torque control without proportionally increasing device complexity.
Solution Approach 2:
The friction device is designed to automatically provide the appropriate frictional resistance based on the operational state without requiring additional control elements. The device self-regulates its frictional behavior to prevent unwanted rotation when needed while allowing smooth adjustment when the brake is applied, eliminating the need for complex additional friction control mechanisms.
3Reliability
If frictional resistance is increased to prevent unwanted rotation, then reliability is improved, but overheating may occur due to excessive friction
Solution Approach 1:
The friction device operates periodically rather than continuously, providing high frictional resistance only during brake release when unwanted rotation needs to be prevented. During brake application, the frictional resistance is reduced or eliminated, allowing smooth operation without excessive heat generation. This periodic activation pattern resolves the contradiction between rotation stability and thermal management.
Solution Approach 2:
The invention extracts the friction function from a continuous operation and applies it only when necessary. By removing the constant frictional resistance and applying it selectively during brake release, the system achieves rotation stability without the continuous heat generation that would lead to overheating. The harmful continuous friction is taken out and replaced with targeted periodic friction.
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 additional wrap spring device reduces temporary torque peaks, enhances torque control, and extends the service life of components by maintaining consistent frictional resistance, preventing overheating and unwanted rotation.
Implementation Method 1
provide a defined resisting torque during brake release and minimize frictional fluctuations
Implementation Method 2
additional wrap spring device is integrated into the brake adjuster
Implementation Method 3
acting as a freewheel spring when the brake is applied and locking when released
Data Source
AI summary
The present invention relates to a brake actuating mechanism for a disc brake having an optimized adjusting device.