Telescopic Lifting Column for Height-Adjustable Work Tables
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Solution Overview
Problem
Existing heavy-duty work tables are costly and complex to manufacture due to high production tolerances and require cumbersome height adjustment mechanisms, such as hydraulic or electric systems, which are expensive and pose safety risks.
Innovation Solution
A telescoping lifting column using interchangeable guide elements and a ball screw transmission unit, where guide elements made of soft materials reduce wear and cost, and a clamping device ensures precise and secure operation, allowing for low-cost, high-load-bearing, and adjustable work tables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If steel components are joined by welding to achieve strong connections, then connection strength is improved, but shape and position tolerances deteriorate due to heat-induced distortion
Solution Approach 1:
The frame is divided into separate steel components (vertical profiles, horizontal profiles, crossbars) that are pre-machined to precise tolerances before assembly. This segmentation allows each component to be manufactured with controlled tolerances and then assembled using threaded connections rather than welding, avoiding heat-induced distortion while maintaining overall structural precision.
Solution Approach 2:
Threaded connections and mounting plates serve as intermediaries between steel components. Instead of directly welding components together (which causes distortion), threaded fasteners provide a mechanical connection that preserves the precise shapes and positions of individual components while achieving strong structural assembly.
2Stability of the object's composition
If work tables are designed to be stationary with rubber feet for stability, then stability and vibration damping are improved, but mobility deteriorates as tables can only be moved by lifting with heavy equipment
Solution Approach 1:
The work table design transitions from a purely stationary configuration to a dynamically adjustable system. The height-adjustable legs with threaded rods and locking mechanisms allow the table height to be changed while maintaining stability during use. The rubber feet provide stable grounding when needed, while the adjustable height mechanism enables easy repositioning and mobility without requiring heavy lifting equipment.
3Adaptability or versatility
If height adjustment is implemented using hydraulic or electric lifting devices, then height adjustability is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex hydraulic or electric lifting systems with a purely mechanical adjustment mechanism. Threaded rods with rotating knobs or handwheels provide height adjustment through simple mechanical threading, eliminating the need for motors, hydraulic pumps, or electrical controls. This mechanical substitution dramatically reduces device complexity and cost while maintaining height adjustability functionality.
Solution Approach 2:
The height adjustment mechanism is designed to be manually operated without external power sources. The threaded rods with rotating knobs allow users to directly adjust table height through manual rotation, and the locking mechanisms (such as split pins or set screws) automatically secure the position. This self-service design eliminates complex control systems while enabling user-friendly height adjustment.
4Ease of operation
If heavy-duty castors are used for mobility, then ease of movement is improved, but stability and vibration damping properties deteriorate significantly
Solution Approach 1:
The work table design transitions from a purely stationary configuration to a dynamically adjustable system. The height-adjustable legs with threaded rods and locking mechanisms allow the table height to be changed while maintaining stability during use. The rubber feet provide stable grounding when needed, while the adjustable height mechanism enables easy repositioning and mobility without requiring heavy lifting equipment.
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 solution enables cost-effective, high-load-bearing, and precisely adjustable work tables with reduced manufacturing complexity and safety hazards, achieving efficient height adjustment with minimal wear and maintenance needs.
Implementation Method 1
a ball screw transmission unit, where guide elements made of soft materials reduce wear and cost
Implementation Method 2
guide elements made of soft materials reduce wear and cost
Data Source
AI summary
A lifting column for a height-adjustable work table comprises a first hollow profile element and a second hollow profile element. The first hollow profile element encloses the second hollow profile element at least in sections. The second hollow profile element is telescopically displaceable in a displacement axis parallel to a vertical axis of the first hollow profile element. A guide device is arranged on the first hollow profile element and comprises a guide element that can be releasably connected to the guide device. A guide element surface of the at least one guide element abuts an outer surface of the second hollow profile element. A height-adjustable work table comprises at least two such lifting columns. A worktop is fixed to one end of the first hollow profile elements. The transmission units are connected to each other via a drive connection element and can be driven by the drive unit.