Modular Utility-Vehicle Cab Structure for Four-Door Flexibility
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Solution Overview
Problem
Existing cab structures for utility vehicles and working machinery lack flexibility in accommodating varying seat arrangements, door configurations, and integration of motor space, particularly failing to support four-door designs and efficient use of space.
Innovation Solution
A modular cab structure with interconnected longitudinal and transverse beams and pillars, formed by steel square tubes or bent sheet metal, allowing for symmetrical and adjustable configurations to accommodate different seat arrangements, door types, and integration of motor space through a motor tunnel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional cab structure with fixed beam and pillar configuration is used, then structural rigidity is maintained, but flexibility in accommodating varying seat arrangements and door configurations is lost
Solution Approach 1:
The cab structure is divided into modular components including longitudinal beams, transverse beams, and pillars that can be selectively arranged. The longitudinal beams are positioned at different distances from the front wall to accommodate various seat configurations, while transverse beams connect these longitudinal elements to form adaptable door frames and structural supports.
Solution Approach 2:
The beam and pillar structure serves multiple functions simultaneously: providing structural rigidity, forming door frames, supporting seat arrangements, and accommodating motor space integration. The same longitudinal beams serve both as structural supports and as guides for positioning seats at different configurations.
2Ease of operation
If the cab structure is designed for four-door configuration with extended longitudinal beams, then door accessibility is improved, but structural complexity and manufacturing difficulty increase
Solution Approach 1:
The four-door configuration is achieved by segmenting the side structure into multiple longitudinal beams (first, second, third longitudinal beams) that can be independently positioned. Each longitudinal beam forms part of a door frame, allowing four separate door openings while maintaining a unified structural approach.
Solution Approach 2:
The longitudinal beams are designed to extend beyond traditional positions, with the third longitudinal beam extending rearward to enable fourth door access. This dynamic extension of structural elements allows the cab to provide four-door accessibility without requiring a completely different structural platform.
3Volume of moving object
If motor space is integrated into the cab structure, then space efficiency is improved, but the cab structure must accommodate variable motor tunnel positioning
Solution Approach 1:
The longitudinal beams serve dual purposes: as primary structural supports for the cab and as positioning references for the motor tunnel. The same beams that define the cab's structural framework also guide the positioning of motor components, eliminating the need for separate motor mounting structures.
Solution Approach 2:
The motor tunnel is nested within the cab structure, with motor components positioned in the space defined by the longitudinal and transverse beams. The motor space is integrated into the overall cab volume rather than being a separate addition, maximizing space utilization.
4Strength
If welded joints are used to connect all beams and pillars, then structural strength is maximized, but manufacturing complexity and assembly time increase
Solution Approach 1:
The structure is segmented into standardized beam and pillar components that can be manufactured separately and then connected through welding. This segmentation allows for specialized manufacturing of each component while maintaining overall structural integrity through the welding connections at defined joint locations.
Data Source
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AI summary
In a cab structure of a utility motor vehicle are parallel to the bottom longitudinal beams (8, 9, 10) spaced from them planar symmetrically arranged inner longitudinal beams (7) in the shape of lying letter L, which are connected to the front under-window transverse beam (13) by the free end of the shorter arm of the L shape and to the bottom end of the rear inner pillar (6) by the rear end, wherein between the bottom end of the rear inner pillar (6), respective rear end of the inner longitudinal beam (7), on one side, and the bottom end of the last pillar (5), respective rear end of the bottom longitudinal beam (8, 9, 10), rear bottom transverse beam (16) is connected.