Lifting mechanism and lifting table
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Solution Overview
Problem
Conventional height-adjustable desks with scissor-type lifting mechanisms face challenges in reducing product cost and complexity, limiting their widespread adoption due to material usage and structural uniformity.
Innovation Solution
A lifting mechanism featuring a cross-arm assembly with a Y-shaped structure, comprising a long and short side hinged together, which simplifies the design, reduces material requirements, and increases storage space, while a driving member adjusts the height through a parallelogram mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a scissor-type lifting mechanism is used, then the lifting function is achieved, but the product cost and structural complexity increase
Solution Approach 1:
The patent extracts and removes redundant components from the traditional scissor-type mechanism. By taking out the unnecessary crossing support sides and retaining only the essential hinged support members, the structure is simplified while maintaining the lifting function, directly reducing material usage and manufacturing cost.
Solution Approach 2:
The patent introduces asymmetric design by making the first and second support members have different lengths. This asymmetric configuration allows the mechanism to achieve the same lifting function with fewer materials and simpler structure compared to the symmetric scissor-type design, resolving the contradiction between cost and functionality.
2Ease of operation
If a scissor-type lifting mechanism is used, then height adjustment is achieved, but storage space under the table top is reduced
Solution Approach 1:
By extracting the redundant crossing support sides from the scissor-type mechanism, the patent creates additional space under the table top. The simplified structure with non-crossing support members allows for increased storage volume while preserving the height adjustment capability through the hinged connection mechanism.
3Reliability
If traditional scissor-type structure is adopted, then lifting stability is achieved, but material usage increases
Solution Approach 1:
The patent removes redundant support members from the traditional scissor-type structure, reducing material usage. The remaining hinged support members maintain lifting stability through their rotational connection and parallelogram configuration, which ensures stable height adjustment without requiring the full scissor-type crossing structure.
Solution Approach 2:
The hinged support members serve multiple functions: they provide structural support, enable height adjustment through rotation, and maintain stability through the parallelogram mechanism. This multi-functionality allows the structure to achieve lifting stability with fewer materials compared to the traditional scissor-type design.
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
This solution reduces material costs, simplifies the structure, and enhances the practicality of height-adjustable desks by providing a more efficient and cost-effective lifting mechanism with increased storage space under the table top.
Implementation Method 1
the four groups of support points formed by the free ends of the first and second combined arms form a parallelogram, and when the position of the moving members within the slide rail is changed, the side lengths of the parallelogram are changed to adjust the distance between the table top and the base
Implementation Method 2
a first sliding connection assembly and a second sliding connection assembly, each comprising a slide rail and a moving member arranged in the slide rail in a manner that can slide and rotate
Data Source
AI summary
A lifting mechanism includes: a cross-arm assembly including a first combined arm and a second combined arm arranged in parallel, the first and second combined arms each comprising a first support member and a second support member, the length of the first support member being greater than the length of the second support member; a support connection assembly including a first rotational connection assembly and a first sliding connection assembly fixed to a base, and a second rotational connection assembly and a second sliding connection assembly fixed to the bottom side of a table top, the first and second sliding connection assemblies each comprising a slide rail and a moving member rotatably and slidably arranged in the slide rail; and a driving member connected to the cross-arm assembly and/or the support connection assembly for driving the moving members to change their position on the slide rail.