Cylinder Device Wedge Force Multiplier Housing Diameter
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Solution Overview
Problem
Conventional cylinder devices with wedge-type force multipliers face challenges in maximizing the pressure-receiving surface area of the first piston due to the narrowing effect of the output rod's cross-sectional area, limiting output and requiring a larger housing diameter.
Innovation Solution
A cylinder device configuration featuring a wedge-type force multiplier with a tapered surface that drives the first piston using pressurized fluid, allowing the second piston to move on the output rod side, thereby maintaining a larger pressure-receiving surface area for the first piston and reducing the housing diameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the second piston is hermetically fitted on the lower half part of the output rod, then the configuration is simple and outside dimension is small, but the pressure-receiving cross section area of the first piston is narrowed
Solution Approach 1:
The patent repositions the pressure-receiving surface from the side of the first piston to the end surface opposite the output rod. This dimensional change allows the pressure-receiving area to be defined by the housing inner diameter rather than being constrained by the output rod diameter, effectively increasing the area without increasing device complexity
Solution Approach 2:
Instead of having the pressure-receiving surface on the first piston side (conventional approach), the patent inverts the arrangement by placing it on the opposite end surface. This inversion eliminates the narrowing effect of the output rod and allows for a larger pressure-receiving area while maintaining compact dimensions
2Power
If the pressure-receiving cross section area of the first piston is enlarged, then the output of the first piston increases, but the outer diameter of the housing must be increased
Solution Approach 1:
The patent changes the dimensional configuration by positioning the pressure-receiving surface on the end surface of the housing rather than on the piston side. This allows the pressure-receiving area to be determined by the housing diameter at the end surface, enabling larger area without increasing the overall outer diameter of the housing
3Force
If a lever-type force multiplier is used, then force multiplication is achieved, but the configuration is complicated and outside dimension is large
Solution Approach 1:
The patent extracts the force multiplication function from a complex lever-type mechanism and implements it through a simplified wedge-type force multiplier. This extraction maintains the essential force multiplication capability while removing unnecessary structural complexity and reducing outside dimensions
Solution Approach 2:
The patent utilizes pneumatic pressure applied to the pressure-receiving surface to generate the force multiplication effect, replacing mechanical lever systems with a pneumatic-hydraulic approach that achieves force multiplication through pressure differential across the piston area
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 configuration increases the output of the first piston while reducing the outer diameter of the housing, enhancing efficiency and compactness without compromising performance.
Implementation Method 1
driving, with the use of a pressurized fluid, an pressure-receiving surface 5 of a first piston 4, 4A
Implementation Method 2
a wedge-type force multiplier M having a tapered surface and is caused to carry out force multiplication driving
Data Source
AI summary
A first piston (4) which is coupled to an output rod (2) and which is inserted in a housing (3) is driven upward by a pressurized fluid. A second piston (6) which is arranged above the first piston (4) is driven downward. This causes a wedge-type force multiplier (M), arranged above the first piston (4), to carry out force multiplication driving with respect to the output rod (2).