Offset Driver Main Body for Gas Spring Shock Absorption
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Solution Overview
Problem
Existing gas-spring type driving tools face a limitation in increasing the volume of the damper that contacts the piston without enlarging the tool size, which affects shock absorbability and durability.
Innovation Solution
The driving tool is configured with a driver main body whose width center is offset away from the lift mechanism with respect to the piston's width center line, allowing a reduction in the through hole's opening area and thereby increasing the damper's contact volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the diameter of the through hole in the damper is increased to allow the driver main body and driving projections to pass through, then the shock absorbability of the damper is improved, but the volume of the damper that contacts the piston is reduced
Solution Approach 1:
The driver main body is positioned asymmetrically with its width center offset from the width center line of the piston. This asymmetric arrangement allows the through hole in the damper to be positioned optimally for shock absorption while maintaining sufficient damper contact volume with the piston, resolving the contradiction between these two requirements
Solution Approach 2:
Instead of increasing the through hole diameter in the horizontal dimension, the solution shifts the position of the driver main body in the horizontal dimension (offsetting width centers). This dimensional adjustment allows the through hole to be larger for better shock absorption while the damper maintains adequate contact volume with the piston
2Reliability
If the volume of the damper is increased to improve shock absorbability and durability, then the shock absorbability is improved, but the size of the driving tool must increase
Solution Approach 1:
The asymmetric positioning of the driver main body relative to the piston enables the damper to be positioned optimally within the existing tool envelope. This allows the damper to achieve increased contact volume for improved durability without requiring an overall increase in the driving tool size
Solution Approach 2:
The solution utilizes horizontal positioning (offsetting width centers) rather than vertical or radial expansion to achieve the desired damper contact volume. This dimensional approach allows the damper to be larger for improved durability while keeping the overall tool footprint unchanged
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 enhances the shock absorbability and durability of the damper by increasing its contact volume without enlarging the tool size, while also ensuring the driver and piston move straight upward.
Implementation Method 1
a piston that moves in a cylinder owing to gas pressure
Implementation Method 2
A damper (cushion) may be arranged on a lower side of the cylinder so as to absorb an impact of the piston that moves downward to the lower end position
Data Source
AI summary
A driving tool for improving shock absorbability and durability of a tubular damper, the driving tool comprising a cylinder and a piston that moves inside the cylinder owing to a gas pressure. The driving tool further comprises a driver main body to drive a driving member by moving integrally with the piston, and a lift mechanism having a wheel for the driver main body to return to original position. The driver main body is arranged such that a width center line of the driver main body is offset in a direction away from the lift mechanism with respect to a width center line of the piston.