Railway Shock Absorber Centering and Wear-Reducing Friction Structure
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Solution Overview
Problem
Existing shock-absorbing units in railway rolling stock face issues with complex assembly, wear of housing walls due to friction surfaces, unstable operation, and lack of effective centering mechanisms for elastomeric elements, leading to reduced reliability and resource life.
Innovation Solution
A redesigned shock-absorbing unit with improved centering of structural elements using a guide pin and elastomeric elements, lubricating liners to reduce friction, and a simplified design that includes specific angles and ledges to ensure accurate positioning and reduced wear, allowing for a working stroke of 110-120 mm.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If friction surfaces are present in the housing with moving parts, then energy absorption function is achieved, but wear of housing walls occurs and reliability decreases
Solution Approach 1:
The patent introduces wear-resistant liners as intermediary elements between the housing walls and friction surfaces. These liners are removable and replaceable, serving as a mediator that protects the housing from direct contact and wear while still allowing the friction function to operate. The liners can be made from materials with high wear resistance and can be replaced when worn, thus maintaining the reliability of the shock-absorbing unit.
2Manufacturing precision
If complex assembly structure is used for centering elastomeric elements, then positioning accuracy is improved, but assembly difficulty increases
Solution Approach 1:
The patent extracts the centering function from the main assembly structure by introducing a separate guide pin element. This guide pin is inserted into the housing and provides a dedicated centering mechanism for the elastomeric elements, simplifying the overall assembly process. The guide pin can be installed independently and provides precise positioning without requiring complex adjustment procedures.
Solution Approach 2:
The guide pin structure is designed to automatically center the elastomeric elements through its geometric fit with the housing and element openings. The centering action occurs automatically during assembly without requiring additional adjustment steps or complex mechanisms. The elastomeric elements self-align with the guide pin, providing self-centering functionality.
3Use of energy by moving object
If multiple friction surfaces and elastic elements are used, then energy absorption capability is improved, but device complexity increases
Solution Approach 1:
The patent segments the shock-absorbing unit into distinct functional modules: friction surfaces for energy dissipation, elastomeric elements for elastic energy storage, and a guide pin for positioning. This segmentation allows each component to be optimized independently and simplifies assembly and maintenance. The modular structure makes it easier to understand and service the device while maintaining high energy absorption capability.
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 redesign enhances reliability and service life by accurately centering structural elements under dynamic loads, reduces wear through lubrication, and simplifies assembly, while maintaining energy absorption efficiency.
Implementation Method 1
The elastic system is formed by an elastic element located in the closed part of the housing
Implementation Method 2
The friction wedge located on the main axis of the housing... The first and the second friction shoes, which are located on both sides of the friction wedge
Implementation Method 3
Each barrier plate and each friction shoe is equipped with lubricating liners
Data Source
AI summary
A shock-absorbing device comprises a hollow housing with a closed end section and an opposing open end section through which a main axis passes, a resilient system disposed in a bottom section of the housing, a pressing element, and a friction system disposed in the open section of the housing. The resilient system is formed by a dynamic load absorber located in the closed part of the housing along the main axis of the housing on the guide bar. The guide bar has a head for installation thereof in a recess formed in the closed bottom section of the housing for centering the guide bar relative to the main axis. All structural components of the friction system and the resilient system are provided and arranged such that the working stroke of the shock-absorbing device is from 110 to 120 mm.