Double-Lift Gas Spring Extension Length via Nested Piston Rod
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Solution Overview
Problem
Conventional gas springs face limitations in extension length, making them unsuitable for applications requiring either long or short travel distances, as increasing the size of components compromises their versatility.
Innovation Solution
A double-lift rigid gas spring design featuring an outer and inner cylinder tube with a floating separator piston, a hollow piston rod, and a control component that allows gas pressure to push a liquid medium into the inner cylinder tube and hollow piston rod, effectively doubling the extension length without altering the cylinder tube size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the sizes of the inner cylinder tube, outer cylinder tube and piston rod are increased to increase the extension length, then the extension length is improved, but the gas spring becomes difficult to apply to many occasions (reduced adaptability)
Solution Approach 1:
The patent implements a nested structure where the piston rod is divided into an inner piston rod and an outer piston rod, with the inner piston rod inserted into the outer piston rod. The inner cylinder tube is nested within the outer cylinder tube. This nesting allows the piston rod to extend beyond the cylinder tube length through telescopic movement, achieving extended travel without increasing the overall cylinder tube size, thus maintaining adaptability while improving extension length.
Solution Approach 2:
The piston rod is segmented into multiple parts (inner piston rod and outer piston rod) that can move relative to each other. The inner piston rod can extend outward from the outer piston rod, creating additional extension length. This segmentation allows the gas spring to achieve longer extension without increasing the base cylinder tube dimensions, preserving versatility for different applications.
2Length of moving object
If a gas spring with long size is used, then long extension length is achieved, but it cannot apply to occasions that need short travel
Solution Approach 1:
The patent introduces a dynamic control mechanism where the inner piston rod can extend or retract relative to the outer piston rod based on control component movement. This dynamic adjustment allows the gas spring to adapt its effective extension length during operation, enabling it to function in both long-travel and short-travel applications using the same physical structure, thus solving the adaptability problem.
Solution Approach 2:
The patent adds a dimensional aspect to the extension mechanism by introducing axial movement of the inner piston rod relative to the outer piston rod. This additional degree of freedom allows the system to achieve variable extension lengths from a fixed cylinder tube size, enabling the same gas spring to accommodate both short and long travel requirements by controlling the relative axial position of the nested piston rod components.
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 design doubles the extension length of the gas spring, enabling it to meet a broader range of application requirements without changing the cylinder tube size, thus enhancing its versatility and applicability across various occasions.
Implementation Method 1
gas pressure is released to push the liquid medium to enter the inner cylinder tube and the hollow piston rod
Implementation Method 2
the liquid medium continues flowing into the hollow piston rod, thereby pushing the piston rod to continue extending
Data Source
AI summary
A double-lift rigid gas spring is invented. It includes an outer cylinder tube, an inner cylinder tube, a ventilated support, a valve body, and a control component. It has benefits: during working, gas pressure is released to push the liquid medium to enter the inner cylinder tube and the hollow piston rod.