Elastic Adjustable Train Brake Pad with Spring Compensation
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Solution Overview
Problem
Existing train brake pad technologies face challenges in maintaining consistent friction area, requiring high machining precision, increasing production costs, and shortening the service life due to uneven friction areas and complex maintenance processes.
Innovation Solution
An elastic adjustable brake pad design featuring a semi-ring plate structure with spiral compression springs, Belleville springs, and anti-rotation pins, which ensures consistent friction area, reduces machining precision requirements, and simplifies maintenance by automatically adjusting braking clearance and embedding an elastic check ring for improved friction and heat insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If spherical structures are adopted for steel back and adjustor, then friction surface adjustment is improved, but external cooperative machining cost increases
Solution Approach 1:
The brake pad is divided into modular components: friction blocks with friction materials, steel backs, and adjustors. This segmentation allows each component to be manufactured separately using standard processes, avoiding the need for expensive spherical casting and cooperative machining while enabling independent optimization and assembly of each module.
Solution Approach 2:
The adjustor is designed as a universal component that can be applied across different brake pad configurations. By using standardized threads and interfaces rather than custom spherical structures, the adjustor achieves universal compatibility and simplifies manufacturing while maintaining the ability to adjust friction surfaces.
2Manufacturing precision
If high machining precision is required for brake pad parts, then friction area consistency is improved, but production cost increases
Solution Approach 1:
The brake pad incorporates self-adjusting mechanisms through elastic elements and modular components that automatically compensate for wear and maintain friction area consistency. The friction blocks can be independently replaced when worn, and the elastic components self-regulate positioning, eliminating the need for high-precision machining while ensuring consistent friction performance.
Solution Approach 2:
The design allows for parameter adjustments in friction block dimensions, elastic element stiffness, and assembly clearances to optimize friction area consistency. By adjusting these parameters within standard manufacturing tolerances rather than requiring high precision machining, the system achieves consistent friction performance at lower production costs.
3Reliability
If complex adjustment mechanisms are used, then braking efficiency is improved, but device complexity increases
Solution Approach 1:
The brake pad employs dynamic elastic elements (springs and elastomers) that automatically adjust the friction blocks' positioning and contact pressure based on operational conditions. This dynamic adaptation ensures optimal braking efficiency without requiring complex mechanical adjustment mechanisms, as the elastic components naturally respond to wear and load variations.
Solution Approach 2:
Elastic elements serve as intermediaries between the rigid structural components, providing the necessary adjustment and compliance. These elastic mediators simplify the overall structure by replacing complex adjustment mechanisms while maintaining braking efficiency through their ability to accommodate dimensional variations and maintain optimal friction block positioning.
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 design enhances braking efficiency, prolongs the service life of brake pads, reduces production costs, and simplifies maintenance by ensuring consistent friction area and automatic adjustment of braking clearance, while maintaining high installation and maintenance efficiency.
Implementation Method 1
one end of the spiral compression spring abuts against the step where the secondary counterbore is located, and the other end of the spiral compression spring abuts against the lower end face of the elastic check ring
Implementation Method 2
the brake pad further includes a brake block assembly and a spiral compression spring; the brake block assembly includes a brake block, a rivet, a Belleville spring and a rivet sleeve
Implementation Method 3
a friction braking structure of a train converts kinetic energy into heat energy via friction and emits the heat energy to the air
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
An elastic adjustable brake pad for use in a train, comprising a brake pad frame (1) provided with a fourth through hole (18), a brake block assembly, and a spiral compression spring (6); the brake block assembly comprises a brake block (16), a rivet (4), a Belleville spring (5), and a rivet sleeve (3), the brake block (16) comprising a friction block (10) and a static sheet steel back (7) fixedly mounted together, the rivet (4) passing through the brake block (16) and being sleeved in turn by the Belleville spring (5) and the rivet sleeve (3); the fourth through hole (18) is a stepped counterbore, and the rivet (4) in the brake block (16) penetrates the fourth through hole (18) and extends outward therefrom, the spiral compression spring (6) being sleeved over the outside of the rivet sleeve (3), and the outer side of one end of the rivet sleeve (3) being provided with a clamping groove clamped to an elastic retainer ring (2), one end of the spiral compression spring (6) abutting a step on which a secondary counterbore (20) is located, and the other end thereof abutting the lower end face of the elastic retainer ring (2); a plurality of anti-rotation pins are arranged between the static sheet steel back (7) and the brake pad frame (1). The present brake pad has the advantages of automatically adjusting the brake clearance, ensuring the friction area at all times, improving brake efficiency, extending service life, and low manufacturing costs.