Brake Pad and Thrust Assembly With Self-Centering Pin Retention
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Solution Overview
Problem
Existing brake pad and thrust device assemblies for brake calipers face challenges in intuitive and efficient assembly, reliability, and versatility, often requiring complex orientation and special tools, which can lead to accidental deformations and residual frictional torques.
Innovation Solution
A brake pad and thrust device assembly featuring a pin with tapered portions and a retention device with elastically movable arms, allowing for axial connection and self-centering, facilitating easy assembly and reliable connection without accidental impacts, and preventing rotations of the brake pad.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wire spring with coupling rings is used to connect brake pad and thrust device, then reversible connection is achieved, but assembly becomes non-intuitive and time-consuming requiring special tools
Solution Approach 1:
The connection system is divided into distinct functional elements: a pin fixed to the brake pad, and a retention device with elastically movable arms housed in the thrust device. This segmentation allows each component to perform its specific function independently, simplifying the overall assembly process while maintaining reliable connection.
Solution Approach 2:
The retention device with elastically movable arms automatically engages with the pin during assembly without requiring external tools or complex orientation. The elastic arms self-adjust to guide the pin into place and secure the connection, making the assembly process intuitive and tool-free.
2Adaptability or versatility
If bent tabs of band spring are used for reversible connection, then connection is achieved, but accidental shocks cause plastic deformations compromising seal and reliability
Solution Approach 1:
The retention device incorporates elastically movable arms that can dynamically adjust to shocks and stresses during operation. Instead of rigid bent tabs that deform permanently, the elastic arms flex to absorb impacts and return to their original position, maintaining connection reliability under varying load conditions.
3Reliability
If V-shaped central bend wire spring is used with pin engagement, then reversible connection is achieved, but assembly requires great attention to orientation and is complex and time-consuming
Solution Approach 1:
The retention device uses asymmetric elastically movable arms with different orientations and functions. This asymmetric design provides natural guidance for pin insertion, eliminating the need for precise orientation attention. The arms are positioned to automatically guide the pin into the correct engagement position, simplifying assembly while maintaining reliable connection.
4Ease of operation
If retention device with elastically movable arms is used, then assembly becomes smooth and intuitive, but device structure becomes more complex
Solution Approach 1:
The retention device merges multiple functions into a single integrated component: the elastically movable arms simultaneously provide guidance for pin insertion, secure the pin in place, and absorb operational shocks. This consolidation achieves smooth assembly while avoiding the need for multiple separate components, balancing structural complexity with operational ease.
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 enables a smooth, intuitive, and reliable assembly process, maintaining connection reliability over time while avoiding residual frictional torques between the brake pad and brake disc, with a reduced risk of plastic deformations and improved adaptability for various piston sizes.
Implementation Method 1
wherein the retention device holds the pin within the thrust device cavity by applying an axial force to the pin along the thrust direction by biasing the thrust device to abut against the brake pad
Implementation Method 2
said first and second retention arms being elastically movable towards and away from said thrust device axis
Data Source
AI summary
A brake pad and thrust device assembly for a brake caliper may have at least one brake pad and at least one thrust device, where each thrust device is reversibly connectable to the brake pad.