Integrated Lifter Frame Layout for Compact Transport Vehicles
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Solution Overview
Problem
Conventional transport vehicles with lifters face challenges in downsizing and light weighting due to reinforced main frames and doubled frames causing unnecessary space and weight, which complicates attachment and increases the overall size and weight of the vehicle.
Innovation Solution
The transport vehicle design integrates lifter mechanisms with the vehicle body frames, which support both driving and auxiliary wheels, allowing for a compact and lightweight structure by positioning lifter mechanisms at the end portions of the frames, reducing unnecessary frame weight and space, and incorporating a connection frame and lower frame for improved accessibility and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the main frame is reinforced to handle heavy loads, then the load-bearing capacity is improved, but the body size and overall weight increase
Solution Approach 1:
The patent merges the lifter frame with the vehicle body frame into a single integrated frame structure. This eliminates the need for separate reinforced frames, reducing overall weight while maintaining the strength required to handle heavy loads (1000 kg or more). The integrated frame shares structural loads efficiently without requiring excessive reinforcement.
Solution Approach 2:
The frame serves multiple functions simultaneously: it supports the vehicle body, accommodates driving and auxiliary wheels, and provides mounting structures for lifter mechanisms. This multi-functionality eliminates the need for separate dedicated frames for each function, reducing weight while maintaining structural integrity for heavy load handling.
2Strength
If separate main frame and lifter frame are used, then the structural strength is improved, but the vehicle size and weight increase due to doubled frames
Solution Approach 1:
The patent combines the previously separate main frame and lifter frame into a single integrated frame structure. This eliminates redundant frame members and attachment portions, reducing frame weight while maintaining structural strength through optimized load distribution paths that handle both vehicle operation and lifter operations.
3Stability of the object's composition
If separate main frame and lifter frame are used, then the structural stability is improved, but the vehicle size increases due to useless space for attachment portions
Solution Approach 1:
The integration of frames eliminates the space required for attachment portions between separate frames. The unified structure removes gaps and redundant attachment areas, compacting the overall vehicle body volume while maintaining structural stability through continuous load-bearing paths.
4Weight of stationary object
If the vehicle is downsized by integrating frames, then the weight is reduced, but the strength may be compromised
Solution Approach 1:
The integrated frame employs local reinforcement strategies where structural strength is enhanced specifically at critical load-bearing locations rather than uniformly throughout the entire frame. This allows weight reduction in non-critical areas while maintaining sufficient strength at key positions for handling heavy loads.
Solution Approach 2:
The patent optimizes frame parameters such as member thickness, cross-sectional geometry, and material distribution to achieve the right balance between weight and strength. By carefully adjusting these parameters in different frame regions, the design maintains load-bearing capacity while minimizing overall weight.
Data Source
AI summary
A transport vehicle includes a pair of left and right vehicle body frames extending in a front and back direction; driving wheels disposed at a middle portion in the front and back direction of the pair of left and right vehicle body frames; auxiliary wheels disposed at a lower portion of an end portion in the front and back direction of each of the right and left vehicle body frames; lifter mechanisms disposed at an upper portion of an end portion in the front and back direction of each of the right and left vehicle body frames; a connection frame connecting upper portions of the right and left vehicle body frames to each other; and a lower frame disposable between the right and left vehicle body frames, the lower frame being removably fixed at lower portions of the right and left vehicle body frames.