Disc Brake Adjustment Sleeve Structure for Air Gap Reduction
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Solution Overview
Problem
Existing disc brake adjustment devices experience increased air gap due to wear, leading to longer response times and reduced braking forces as the wrap spring's play with the guide sleeve is not effectively compensated, resulting in delayed brake pad contact with the disc.
Innovation Solution
An intermediate ring is introduced to overcome the play between the guide sleeve and the wrap spring, featuring lugs for circumferential support, a stop to prevent twisting, and delimiters to restrict axial movement, ensuring the wrap spring is securely positioned and allowing for free deformation, thus reducing the air gap and enhancing braking force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the wrap spring is arranged inside the guide sleeve without an intermediate ring, then the structure is simpler, but the play between the wrap spring and guide sleeve increases the air gap and response time
Solution Approach 1:
An intermediate ring is introduced as a mediator component between the wrap spring and guide sleeve. This intermediate ring eliminates the play between these components, ensuring that the wrap spring remains in constant contact with the guide sleeve during actuation, thereby reducing the air gap and response time without significantly increasing structural complexity
2Device complexity
If the wrap spring is fixed axially without an intermediate ring, then the structure is simpler, but the air gap increases leading to reduced braking forces
Solution Approach 1:
The intermediate ring acts as a mediator that provides axial positioning for the wrap spring, eliminating gaps that would otherwise reduce braking force transmission efficiency. This ensures optimal contact between brake pads and disc, maximizing braking force
3Device complexity
If the wrap spring has freedom of movement in the guide sleeve, then the structure is simpler, but wear adjustment precision decreases
Solution Approach 1:
The intermediate ring serves as a precision intermediary component that provides controlled positioning of the wrap spring within the guide sleeve. This enables precise wear adjustment while maintaining structural simplicity, as the intermediate ring translates small movements into precise positioning adjustments
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 reduces the response time by eliminating the play between the wrap spring and guide sleeve during braking, resulting in improved braking forces and faster brake pad contact with the disc, while maintaining adaptability to different sleeve diameters.
Implementation Method 1
an actuation device with a wrap spring (4)
Implementation Method 2
the groove ring is coupled to a closure cap via a torsion spring (7)
Data Source
AI summary
An adjustment device for a disc brake is operable for adjusting brake pads to compensate wear. The adjustment device includes a guide sleeve in which a wrap spring is arranged a groove ring surrounding the guide sleeve and coupled to a closure cap via a torsion spring, and an opening ring surrounding the groove ring.