Frame for a table
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Solution Overview
Problem
The assembly of height-adjustable table frames is cumbersome and time-consuming due to large, heavy parts and the need for numerous screw operations, often resulting in instability and play in the joints.
Innovation Solution
The motor unit is integrated into the longitudinal member and connected to the drive mechanism of the height-adjustable legs, with a U-shaped mounting bracket and pawl unit for simplified assembly and stabilization, allowing for synchronized motor control and reduced component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the frame uses traditional box-shaped housing with separate motor unit and transmission, then the drive mechanism is robust, but the assembly process becomes troublesome and time-consuming due to large, heavy parts and numerous screw operations
Solution Approach 1:
The patent combines the motor unit, transmission, and telescopic guide into a single integrated lifting column assembly. The motor unit is mounted directly on the telescopic guide, and the transmission is integrated within the same housing structure, eliminating the need for separate box-shaped housings and reducing the number of assembly operations required.
Solution Approach 2:
The lifting column is designed as a modular assembly with distinct but integrated components: the telescopic guide, motor unit, and transmission are separate functional modules that can be assembled together in a simplified manner, reducing the overall assembly complexity compared to traditional designs.
2Device complexity
If the frame uses through-going tube profiles for longitudinal members, then the structure is simple, but the assembly requires precise placement and numerous screw operations resulting in instability and play in joints
Solution Approach 1:
The cross members are designed with pre-integrated mounting features including recesses and protrusions that align with corresponding features on the longitudinal members. This preliminary design of connection features ensures proper alignment and reduces the need for precise manual placement during assembly, minimizing joint play.
Solution Approach 2:
The patent introduces mounting brackets as intermediary components between the longitudinal members and cross members. These brackets provide a stable intermediate connection point that reduces joint play and improves the overall stability of the frame structure.
3Strength
If the lifting column uses a box-shaped housing at the upper end, then the motor and transmission are protected, but the parts become large and heavy making assembly troublesome
Solution Approach 1:
The motor unit housing and transmission housing are merged into a single integrated structure that also serves as the upper end housing of the telescopic guide. This consolidation eliminates the need for a separate box-shaped housing, reducing the overall weight and dimensions of the lifting column while still providing adequate protection for the motor and transmission components.
4Adaptability or versatility
If multiple separate components are used in the frame, then the design is flexible, but the assembly requires numerous screw operations and correct placement of individual parts
Solution Approach 1:
The patent merges multiple separate components into integrated assemblies: the motor unit is integrated with the telescopic guide, the transmission is integrated with the motor unit housing, and the cross members are integrated with mounting brackets. This reduces the number of separate parts that need to be handled and assembled, significantly improving ease of assembly while maintaining design flexibility through modular integration.
Data Source
AI summary
A frame for sit-stand-tables comprising a longitudinal member, two height-adjustable legs with at least two telescopic profiles, namely an outer and an inner profile, and with a driving mechanism, driven by a motor unit, comprising an electric motor and a gear. According to the invention the motor unit is arranged in the longitudinal member and connected to the driving mechanism in the height-adjustable legs. Thus, a frame with a simplified construction is achieved. The construction of the legs can be simplified and at the same time the dimensions can be reduced, as it is not necessary to take the building-in of a motor into the legs into consideration. As both legs are driven by a joint motor unit, the electric control can also be simplified as it will not have to drive the two legs synchronously.