Lattice Frame Cab Structure Integrating Underrun Guard
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Solution Overview
Problem
Conventional driver's cab shell constructions from pressed sheet metal parts are economically viable only for large production quantities, requiring high investment in tools, and do not efficiently integrate underrun protection, limiting flexibility and cost-effectiveness in smaller production runs.
Innovation Solution
A driver's cab support structure designed as a lattice frame, incorporating a tubular steel skeleton with integrated underrun protection, allowing for low tool investments and direct integration of safety features like side crash structures and towing devices, which can be clad with sheet metal or plastic for enhanced protection and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a shell construction from pressed sheet metal parts is used, then manufacturing precision and structural strength are improved, but device complexity and investment requirements increase
Solution Approach 1:
The patent combines the driver's cab support structure with the underrun protection into a single integrated lattice frame structure. The underrun protection is no longer a separate component but is merged with the cross members of the lattice frame, reducing the number of parts and simplifying the overall construction while maintaining both structural integrity and safety functions
Solution Approach 2:
The lattice frame cross members serve multiple functions: they provide structural support for the driver's cab while simultaneously functioning as underrun protection. This multi-functionality eliminates the need for separate underrun protection components and reduces construction complexity
2Strength
If pressed sheet metal shell construction is used, then structural strength is improved, but ease of manufacture and cost-effectiveness worsen for small production quantities
Solution Approach 1:
The patent changes the manufacturing approach from high-precision pressed sheet metal forming to a lattice frame construction that can be manufactured using simpler processes such as welding or assembly of tubular elements. This parameter change in manufacturing method reduces tool investment requirements while maintaining structural strength through the lattice design
3Reliability
If underrun protection is installed separately on the vehicle frame, then safety function is improved, but device complexity and installation time increase
Solution Approach 1:
The underrun protection is merged with the driver's cab support structure lattice frame, specifically integrated into the cross members. This eliminates the need for separate installation on the vehicle frame, as the underrun protection function is already provided by the cab's own structural elements
Solution Approach 2:
The lattice frame cross members are designed to serve dual purposes: providing structural support for the cab and simultaneously functioning as underrun protection. This multi-functionality ensures safety while reducing installation complexity and time
Data Source
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AI summary
The invention relates to a driver's cab (12) for a commercial vehicle (10), preferably a truck. The driver's cab (12) has a cab support structure (18) that forms a cab body and is designed as a lattice frame. The driver's cab (12) has a front underride guard (30) that is integrated into the driver's cab support structure (18) as a cross member of the lattice frame. The lattice frame enables economical production of the driver's cab (12) even in small quantities. The lattice frame can also integrate additional functions, such as the front underride guard (30).