Truck-mounted forklift wheel arm lateral alignment guide
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Solution Overview
Problem
Truck-mounted forklifts experience reduced robustness and stability due to clearance in extendable wheel arms, leading to undesirable wear and potential cargo instability during loading and unloading.
Innovation Solution
A truck-mounted forklift with a frame, steerable wheels, and a shaped guide for controlled extension and retraction of wheel arms, which aligns them laterally to prevent clearance and enhance stability, combined with a tilting and unfolding mechanism for load carriers to maintain compact overhang length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If wheel arms are extended to enable loading and unloading operations, then the forklift can reach cargo in the truck cargo space, but clearance occurs between extendable parts causing reduced robustness and increased wear
Solution Approach 1:
A shaped guide is introduced as an intermediary component between the extendable wheel arm parts. This guide aligns the wheel arms laterally during extension and retraction, preventing clearance and unwanted movement between the mating parts. The shaped guide acts as a mediator that ensures precise alignment while allowing the necessary extension movement.
2Length of moving object
If wheel arms are extended to increase working reach, then cargo can be loaded and unloaded from truck positions, but lateral clearance between parts causes cargo instability
Solution Approach 1:
The shaped guide serves as a lateral alignment mechanism that prevents clearance between extendable wheel arm parts. By constraining the relative movement of these parts, the guide ensures stable support for the cargo during loading and unloading operations, eliminating the instability caused by lateral clearance.
3Length of stationary object
If extendable wheel arms are used to reduce minimum overhang length, then compact transport form is achieved, but clearance and wear increase during operation
Solution Approach 1:
The shaped guide is positioned to align the wheel arms laterally during both extension and retraction. This intermediary component prevents clearance between the mating surfaces of the extendable parts, thereby reducing wear while maintaining the compact overhang length necessary for transport.
Solution Approach 2:
The harmful effect of clearance is extracted and concentrated to the shaped guide itself. The guide absorbs the wear through its design, protecting the critical wheel arm components from excessive wear while maintaining the beneficial compact structure.
4Ease of operation
If wheel arms are extended for loading operations, then cargo accessibility is improved, but unwanted lateral movement and clearance occur
Solution Approach 1:
The shaped guide provides lateral alignment during the extension and retraction of wheel arms, preventing unwanted lateral movement. This intermediary component ensures that the wheel arms remain stable and properly aligned throughout the loading operation, improving both accessibility and stability.
Data Source
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AI summary
The present invention relates to a truck-mounted forklift truck for loading and/or unloading a cargo space of a truck, a truck provided therewith and method therefor. The truck-mounted forklift truck comprises: - a frame provided with mounting elements configured to mount the truck-mounted forklift truck on a truck provided with the cargo space, a set of forks, a number of wheels and a drive; - a set of forks for picking up and/or setting down a cargo during the loading and/or unloading; - one or more wheel arms arranged on the frame and provided with a wheel, wherein the wheel arms are extendable, wherein the wheel arm is provided with a shaped guide configured to align the wheel arm in lateral direction for aligned extending and retracting of the wheel arm.