Rail Vehicle Chassis Frame Support Recess Design
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Solution Overview
Problem
The existing chassis frame designs for rail vehicles have high manufacturing and material costs, weight, and increased torsional stiffness due to rigid connections between longitudinal and transverse supports, which reduce derailing resistance and require complex and costly weld seams.
Innovation Solution
The design incorporates box-shaped connecting portions with straight peripheral edges and recesses to facilitate high-quality weld seams, reducing weld seam cross-sections and lengths, and uses I-beam configurations and bent parts to minimize torsional stiffness and weight, allowing for more efficient and cost-effective production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If rigid connections with large weld seam lengths and cross-sections are used between longitudinal and transverse supports, then structural durability and load-bearing capacity are improved, but manufacturing costs, material costs, and weight increase
Solution Approach 1:
The patent changes the geometric parameters of the connecting portions by introducing recesses that reduce the weld seam cross-section and length. This allows achieving the required structural durability with reduced material usage, thereby lowering weight and costs while maintaining strength.
Solution Approach 2:
The connecting portions are designed with localized recesses at specific locations where weld seams are formed. This local modification reduces the weld seam dimensions only where necessary for connection, while maintaining the overall structural integrity and durability of the chassis frame.
2Strength
If rigid connections with large weld seam lengths and cross-sections are used between longitudinal and transverse supports, then structural durability is improved, but manufacturing costs increase
Solution Approach 1:
The patent modifies the geometric parameters of the connecting portions by introducing recesses that reduce the weld seam cross-section and length. This parameter change leads to reduced material consumption and lower manufacturing costs while maintaining the required structural durability.
Solution Approach 2:
The connecting portions are designed with localized recesses at specific locations where weld seams are formed. This local modification reduces the weld seam dimensions only where necessary for connection, thereby reducing manufacturing costs while maintaining structural integrity.
3Strength
If rigid connections are used between longitudinal and transverse supports, then connection strength is improved, but torsional stiffness of the chassis frame increases, reducing derailing resistance
Solution Approach 1:
The patent changes the geometric parameters of the connecting portions by introducing recesses that reduce the weld seam cross-section and length. This parameter change allows achieving the required connection strength with reduced torsional stiffness, thereby improving derailing resistance while maintaining connection integrity.
Solution Approach 2:
The connecting portions are designed with localized recesses at specific locations where weld seams are formed. This local modification reduces the torsional stiffness impact while maintaining connection strength, as the recesses are strategically placed to minimize rigid connection effects.
4Reliability
If massive connecting portions are used to ensure structural durability, then connection reliability is improved, but weight and material consumption increase
Solution Approach 1:
The patent changes the geometric parameters of the connecting portions by introducing recesses that reduce the weld seam cross-section and length. This parameter change allows achieving the required connection reliability with reduced material usage, thereby lowering weight while maintaining reliability.
Solution Approach 2:
The connecting portions are designed with localized recesses at specific locations where weld seams are formed. This local modification reduces the material consumption and weight only where necessary for connection, while maintaining the overall reliability of the chassis frame structure.
Data Source
AI summary
A longitudinal support and a transverse support for a chassis frame of a rail vehicle, wherein the longitudinal support includes a first box-shaped connection portion having a sectionally straight first circumferential edge for connection to the transverse support, where the transverse support has a second box-shaped connection portion having a sectionally straight second circumferential edge for connection to the longitudinal support within a transverse direction of the chassis frame, respectively on the end side, and where the first and second circumferential edges are each configured as four first and second connection edges to achieve a reduction of the weight of the longitudinal support and of the transverse support, and to lower the twisting rigidity of the chassis frame, where the connection edges are separated from each other by first and second recesses.