Rail Vehicle Underframe with Integrated Cross Member Positioning
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Solution Overview
Problem
Existing rail vehicle base frames require extensive auxiliary equipment for precise positioning and assembly of cross beams, making them time-consuming and difficult to modify.
Innovation Solution
A base frame design featuring longitudinal beams with openings for cross members that can be rotated into place, eliminating the need for auxiliary devices, with recesses on cross members to align and connect with longitudinal beams, allowing for simplified assembly and welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional auxiliary equipment is used for precise positioning of cross members, then assembly precision is improved, but device complexity and assembly time increase
Solution Approach 1:
The longitudinal members are designed with integrated positioning openings that automatically guide and constrain the cross members to their correct positions during assembly. The openings serve dual functions: guiding the insertion of cross members and defining their precise mounting positions, eliminating the need for separate auxiliary positioning devices.
Solution Approach 2:
The positioning function previously performed by separate auxiliary equipment is merged directly into the longitudinal members through the positioning openings. This integration combines the structural support function of longitudinal members with the positioning guidance function, reducing the number of separate components needed.
2Strength
If longitudinal members are designed as uninterrupted one-piece structures, then structural strength is improved, but manufacturing flexibility and adaptability decrease
Solution Approach 1:
The longitudinal members are divided into multiple sections that can be manufactured separately and then connected. The positioning openings are strategically placed at segment boundaries and along the length of members, allowing for modular construction while maintaining the structural integrity and strength of the complete longitudinal member assembly.
Data Source
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AI summary
The invention relates to an underframe (1) for a rail vehicle car body, comprising a plurality of longitudinal support members (2) oriented in the longitudinal direction of the underframe (1), and at least one transverse support member (3) which in the fitted position is oriented perpendicular to the longitudinal support members, wherein the longitudinal support members (2) each have an opening (4) at the level of the mounting position of the transverse member (3) through which said transverse member (3) can be inserted. Sig.