Fold-Down Tray Hinge With Clamping Lever for Compact Trolley Storage
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Solution Overview
Problem
Rigid and immovable shelves on load transport vehicles pose a challenge when trying to stow them away for space-saving purposes.
Innovation Solution
A clamping device with a tensioning lever, pull rod, connection elements, and positioning elements allows for the variable positioning and folding of shelves, enabling the reduction of the vehicle's dimensions by allowing the shelves to be folded down.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If shelves are rigidly and immovably attached to the load transport trolley, then the shelves provide stable support for loads, but the trolley cannot be stored in a space-saving manner
Solution Approach 1:
The shelf is transformed from a fixed rigid structure to a dynamically adjustable one. The clamping device allows the shelf to be positioned at different angles relative to the trolley frame, enabling it to be folded flat downwards for compact storage or positioned at optimal angles for load support during transport.
Solution Approach 2:
The shelf assembly is divided into separable components: the shelf tray, the clamping device with drawbar, and the connecting elements. This segmentation allows the shelf to be independently adjusted and positioned relative to the trolley frame, enabling both stable support and compact storage configurations.
2Volume of moving object
If the shelf is made foldable to reduce storage volume, then the trolley can be stowed away compactly, but the shelf may become less stable when carrying loads
Solution Approach 1:
The shelf transitions from a static fixed structure to a dynamic adjustable one. When folded flat for storage, the shelf achieves compact volume. When positioned at optimal angles during transport, the clamping device provides stable support, resolving the contradiction between compact storage and load-bearing stability.
Solution Approach 2:
The angle between the shelf and trolley frame is changed as a key parameter. The clamping device enables adjustment of this angle to optimize both storage compactness and load support stability, allowing the system to adapt its configuration based on operational requirements.
3Volume of moving object
If a clamping device with multiple connecting elements is used to enable variable shelf positioning, then the shelf can be folded flat for compact storage, but the device complexity increases
Solution Approach 1:
The clamping device is segmented into functional components (clamping lever, drawbar, connecting elements, positioning elements) that can be independently manufactured and assembled. This modular approach manages complexity by allowing each component to perform a specific function while working together to achieve compact shelf storage.
Solution Approach 2:
The connecting element is designed as a cylindrical tube that can receive and accommodate the drawbar within it. This nesting arrangement reduces the overall space required for the clamping mechanism and simplifies the structural configuration, enabling compact shelf positioning without excessive device complexity.
Data Source
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AI summary
A clamping device for variably positioning an angular adjustment of at least one tray on a load transport trolley for transporting loads, preferably tool boxes. The clamping device contains a clamping lever for reversibly adjusting the clamping device in a clamped or released position, wherein, in the released position, the tray, a pull rod which is movable reversibly by the clamping lever into a first or second position, wherein the clamping device is in the clamped position when the pull rod is adjusted into the first position, and the clamping device is in the released position when the pull rod is adjusted into the second position; an attachment element for connecting the tray to the clamping device, and a first and second connecting element for connecting the clamping device to a frame of the load transport trolley.