Hydraulic Lift Column With Integrated Actuator Guidance
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Solution Overview
Problem
Hydraulic lifting columns in the medical field face challenges in meeting requirements for robustness, carrying capacity, stroke length, reliability, ease of maintenance, hygiene, low noise, and cost-effectiveness, particularly in terms of noise reduction and gentle movement initiation.
Innovation Solution
A hydraulic lifting column design featuring four parallel, vertically oriented linear actuator units with double cylinders and piston rods, eliminating separate guide devices for a lightweight, compact, and low-maintenance structure with a direct hydraulic coupling, and an optional mode for reduced energy consumption and load distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If separate guide devices are added to the lifting column, then guidance precision and stability are improved, but device complexity and weight increase
Solution Approach 1:
The patent merges the guidance function with the hydraulic linear actuators themselves. The four linear actuator units with vertically oriented working directions serve as both the lifting mechanism and the geometric guide for the head structure relative to the base structure. This eliminates the need for separate guide devices such as linear guides or dovetail guides, thereby reducing device complexity and weight while maintaining stable guidance through the parallel arrangement of the actuators.
2Stability of the object's composition
If separate guide devices are added to the lifting column, then guidance precision is improved, but weight and space requirement increase
Solution Approach 1:
The patent merges the guidance function with the hydraulic linear actuators themselves. The four linear actuator units with vertically oriented working directions serve as both the lifting mechanism and the geometric guide for the head structure relative to the base structure. This eliminates the need for separate guide devices such as linear guides or dovetail guides, thereby reducing device complexity and weight while maintaining stable guidance through the parallel arrangement of the actuators.
3Stability of the object's composition
If separate guide devices are added to the lifting column, then guidance precision is improved, but maintenance requirement increases
Solution Approach 1:
The patent merges the guidance function with the hydraulic linear actuators themselves. The four linear actuator units with vertically oriented working directions serve as both the lifting mechanism and the geometric guide for the head structure relative to the base structure. This eliminates the need for separate guide devices such as linear guides or dovetail guides, thereby reducing device complexity and weight while maintaining stable guidance through the parallel arrangement of the actuators.
4Stability of the object's composition
If separate guide devices are added to the lifting column, then guidance precision is improved, but static friction increases
Solution Approach 1:
The patent merges the guidance function with the hydraulic linear actuators themselves. The four linear actuator units with vertically oriented working directions serve as both the lifting mechanism and the geometric guide for the head structure relative to the base structure. This eliminates the need for separate guide devices such as linear guides or dovetail guides, thereby reducing device complexity and weight while maintaining stable guidance through the parallel arrangement of the actuators.
5Stability of the object's composition
If separate guide devices are added to the lifting column, then guidance precision is improved, but the risk of germ colonization increases
Solution Approach 1:
The patent merges the guidance function with the hydraulic linear actuators themselves. The four linear actuator units with vertically oriented working directions serve as both the lifting mechanism and the geometric guide for the head structure relative to the base structure. This eliminates the need for separate guide devices such as linear guides or dovetail guides, thereby reducing device complexity and weight while maintaining stable guidance through the parallel arrangement of the actuators.
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 design achieves smooth, quiet, and efficient lifting and lowering movements with reduced static friction and germ colonization risks, while maintaining high carrying capacity and flexibility at lower costs, enhancing practicality and hygiene in medical applications.
Implementation Method 1
a lifting structure (3) of the hydraulic type having hydraulic linear actuators and a hydraulic unit (6, 7) acting on these
Data Source
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AI summary
A hydraulic lifting column, for example for an operating table, comprises a base structure (1), a head structure (2), and a lifting structure (3) extending between the base structure (1) and the head structure (3), which includes hydraulic linear actuators and a hydraulic power unit acting on them. The lifting structure (3) comprises four linear actuator units (8) with a vertically oriented working direction parallel to each other. Each linear actuator unit (8) comprises a double cylinder (9) having two adjacent cylinder bores (10) and two piston structures (11) with piston rods (15) oriented parallel to each other and extending in opposite directions from the double cylinder (9). The four lower piston rods (15u) are connected to the base structure (1) at the vertices of a first quadrilateral, and the four upper piston rods (15o) are connected to the head structure (2) at the vertices of a second quadrilateral.