Double parallelogram vertical lifting device
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Solution Overview
Problem
Conventional vertical lifting devices, such as those with Z-shaped connecting rod groups or single parallelogram lifters, have complex electronic control mechanisms, large volume, high output resistance, and limited load capacity due to design inefficiencies, making them unsuitable for lifting heavier objects efficiently.
Innovation Solution
A double parallelogram vertical lifting device with a linkage mechanism and a pushing device, featuring a first and second gear system that generates a reaction force to synchronously raise and lower support units, allowing for a simple structure, small volume, high stroke, and large load capacity by forming parallelograms and using a pushing unit to drive the upper and lower support units to expand or fold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a Z-shaped connecting rod group is used, then the lifting function is achieved, but the output resistance of thrust force becomes large and load capacity is limited
Solution Approach 1:
The invention divides the lifting system into two separate parallelogram support units (upper and lower) instead of using a single Z-shaped connecting rod group. Each support unit independently provides lifting force, segmenting the thrust requirement and reducing the output resistance on any single mechanism while eliminating the need for complex electronic control.
Solution Approach 2:
The patent introduces a gear pair (first gear on upper support unit, second gear on lower support unit) as an intermediary mechanical element to coordinate the motion between the two support units. This mechanical intermediary replaces the electronic control mechanism, allowing synchronized operation through pure mechanical engagement without sensors or controllers.
2Device complexity
If a single parallelogram lifter is used, then the structure is simpler, but the position of fulcrum and center of gravity deviates too much causing greater torque requirement
Solution Approach 1:
The invention segments the single parallelogram lifter into two parallelogram support units working in parallel. This segmentation allows the fulcrum and center of gravity to be positioned more favorably in each unit, reducing the torque arm length and consequently the required torque while maintaining structural simplicity.
Solution Approach 2:
The dual parallelogram configuration creates a balanced force distribution where the upper and lower support units work together to counterbalance the load. This arrangement effectively distributes the torque requirement across two mechanisms rather than concentrating it in one, reducing the torque demand on each individual unit.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The double parallelogram design reduces resistance and increases lifting efficiency, enabling the device to handle heavier loads with reduced energy consumption and environmental impact, while maintaining a compact size and simple structure.
Implementation Method 1
The upper support unit is provided with a first gear, and the lower support unit is provided with a second gear that meshes with the first gear
Data Source
AI summary
The present invention provides a double parallelogram vertical lifting device comprising a linkage mechanism and a pushing device. The linkage mechanism comprises a first shaft seat, a second shaft seat, a third shaft seat, an upper support unit movably coupled to the first shaft seat and the second shaft seat on both ends, and a lower support unit movably coupled to the second shaft seat and the third shaft seat on both ends. The upper support unit is provided with a first gear, and the lower support unit is provided with a second gear that meshes with the first gear. The pushing device has one end set on the upper support unit and the other end set on the lower support unit. The invention utilizes the interaction of the first gear and the second gear to generate a reaction force, which enables the lower support unit to cooperate with the upper support unit to move up and down synchronously, and achieves the effect of simple structure and large load capacity.