Sheet Metal Coupler House Force Path Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Automatic couplers for rail vehicles face material fatigue due to repeated tensile and compressive loads, leading to the need for heavy, costly cast coupler houses to withstand thrust and tractive forces, which complicates manufacturing and increases weight.
Innovation Solution
A coupler head with a sheet metal coupler house composed of two elongate shell-shaped parts joined by welding seams, where tractive forces are transferred through a central beam and thrust forces are distributed through the house parts and welding seams, reducing the risk of fatigue and simplifying the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a cast coupler house is used to withstand thrust and tractive forces, then the strength and reliability are improved, but the weight increases and manufacturing complexity increases
Solution Approach 1:
The coupler house is divided into two separate shell-shaped parts that are joined together, allowing each part to be optimized for specific force directions. This segmentation enables the structure to handle thrust and tractive forces separately, reducing the overall material needed while maintaining strength.
Solution Approach 2:
The invention uses sheet metal instead of cast material, representing a composite approach where thin-walled sheet metal structures replace traditional heavy cast components. This material substitution significantly reduces weight while maintaining structural integrity through proper design of the shell parts and welding seams.
2Reliability
If a cast coupler house is used to withstand repeated tensile and compressive loads, then the reliability is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The coupler house is segmented into two separate shell parts that can be manufactured independently using sheet metal forming processes, which are generally simpler and more cost-effective than casting complex three-dimensional structures. These parts are then joined by welding, aĉç and reliable process that ensures structural integrity.
Solution Approach 2:
The invention changes the manufacturing approach from casting to sheet metal forming and welding. This parameter change in the manufacturing process enables better control over material properties, easier production, and reduced costs while maintaining or improving reliability through optimized force distribution.
3Strength
If the coupler house is designed to resist both thrust and tractive forces, then the strength is improved, but the weight and material usage increase
Solution Approach 1:
The coupler house is divided into two separate shell parts, each optimized to handle specific force components. This segmentation allows the structure to resist both thrust and tractive forces using less material than a monolithic design would require, as each part can be tailored to its specific loading conditions.
Solution Approach 2:
The invention employs thin-walled sheet metal shell parts instead of thick cast structures. These flexible shells are designed to efficiently transmit forces while using minimal material, achieving strength requirements through optimized geometry and proper joining of the two shell parts rather than through excessive material thickness.
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
This design reduces the weight of the coupler head, minimizes material fatigue, and simplifies production by allowing the coupler house to be made from sheet metal, effectively managing forces through different paths to reduce stress on welding seams and the coupler house.
Implementation Method 1
the parts of the coupler house being joined to the outside of the beam by means of welding seams that mainly run in the longitudinal direction of the beam
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Coupler head (1) in automatic couplers for rail vehicles, which comprises a coupler house (13, 14) formed to contain components (6, 7, 8) included in a mechanical coupling and, in a front end, to support a front plate (3). The coupler house consists of two separate elongate shell-shaped house parts (13, 14), which in mutually opposite and open long sides are individually joined to the outside of a beam ( 12) that runs centrally in the coupler head and in a rear end is adapted to be coupled to a drawbar and in a front end adapted for bearing a main shaft (8) included in the mechanical coupling, the parts of the coupler house being joined to the outside of the beam by means of welding seams ( 16) that mainly run in the longitudinal direction of the beam, whereby tractive forces are transferred from the coupling to the drawbar via the centrally running beam without loading said house parts and welding seams, while thrust forces are transferred from the front plate to the beam and the drawbar via said house parts and welding seams without loading the coupling, the main shaft thereof and the bearing of the main shaft in the beam.