Inclined Brake Pad Arrangement for Buffer Stop Shock Management
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Solution Overview
Problem
Existing brake assemblies for sliding buffer stops face challenges in achieving optimal friction levels, as tight fastening can lead to excessive shock, while loose fastening results in inadequate sliding friction, affecting the braking performance.
Innovation Solution
A brake assembly design featuring a brake pad arrangement with inclined surfaces and clamping sections that increase friction by distributing force effectively, allowing for progressive movement and enhanced braking through the use of brake lining portions and strategically placed clamping sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the plates are fastened tightly to the brake pad, then the stationary friction is improved, but the vehicle suffers a big shock after impact
Solution Approach 1:
The brake pad is divided into multiple friction surfaces including a first friction surface and a second friction surface. The first friction surface provides stationary friction while the second friction surface provides sliding friction. This segmentation allows the brake assembly to distribute the braking force across different phases of impact, reducing shock while maintaining effective friction.
Solution Approach 2:
The brake assembly transitions from a static friction configuration to a dynamic one where the brake pad can slide relative to the plate. The sliding friction surface is designed to engage after the stationary friction is overcome, allowing the system to adapt its friction characteristics based on the impact phase, thereby reducing shock while maintaining braking effectiveness.
2Object-affected harmful factors
If the plates are not fastened enough, then the shock is reduced, but the sliding friction is not good enough
Solution Approach 1:
Different regions of the brake assembly have different friction characteristics. The first friction surface is designed for stationary friction with higher friction coefficient, while the second friction surface is designed for sliding friction with appropriate friction characteristics. This local differentiation ensures that each surface contributes optimally to the overall braking performance without causing excessive shock.
Solution Approach 2:
The brake assembly is designed so that the stationary friction surface engages first to provide initial braking force. After this preliminary action, the sliding friction surface engages to continue the braking process. This sequential engagement ensures that sliding friction is activated at the appropriate moment, maintaining good braking performance while controlling shock.
3Device complexity
If a single friction surface is used, then the structure is simple, but the braking performance is inconsistent
Solution Approach 1:
The brake pad is segmented into multiple friction surfaces with distinct functions. The first friction surface handles stationary friction during initial impact, while the second friction surface handles sliding friction during continued movement. This segmentation ensures consistent braking performance across different impact phases while maintaining a relatively simple overall structure.
Solution Approach 2:
The brake assembly is designed to perform multiple functions using the same basic components. The same brake pad structure provides both stationary friction and sliding friction capabilities, allowing it to adapt to different impact scenarios. This multi-functionality ensures consistent braking performance without requiring separate brake assemblies for different conditions.
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 provides a consistent and effective braking performance by adjusting friction levels based on impact force, reducing the risk of shock and improving braking efficiency by distributing pressure and increasing frictional contact areas.
Implementation Method 1
the second face is inclined with respect to the third face for guiding the first block upwardly relative to the head when said first block slides along the second face of the second block due to a movement of one of the first block, the second block or the two plates along a longitudinal direction of said head
Data Source
Figure 1A~1B
Figure 2~3
AI summary
A brake assembly for a sliding buffer stop, the brake assembly comprising: - a brake pad arrangement comprising: a) a first block comprising a first face; and b) a second block comprising a second face and a third face; - two plates having clamping sections; and - means for fastening the two plates to clamp said brake pad arrangement to a head of a rail track, such that: i) the clamping sections can engage the bottom sections of the head; and ii) the third face of the second block can engage a top section of the head and the first block can be supported by its first face on the second face of the second block; wherein the second face is inclined with respect to the third face for guiding the first block upwardly relative to the head when said first block slides along the second face.