Driving Tool Engagement Correction via Asymmetric Wheel Geometry
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gas-spring type driving tools face instability in driving operations due to deviations in the engagement of the driver with the wheel, particularly when the driver stops short of the lower end position due to nail jamming or similar issues.
Innovation Solution
The driving tool incorporates a wheel with engaging portions that are configured to successively engage the driver's engaged portions, with a preceding engaging portion having a smaller diameter or being positioned closer to the rotation center axis, allowing for easier disengagement and correction of deviated engagements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver stops before reaching the lower end position due to nail jamming, then the driving operation is interrupted, but the engagement of the wheel with the driver deviates from the proper position causing instability in subsequent operations
Solution Approach 1:
The patent applies local quality by making the outer area of the preceding engaging portion smaller than that of other engaging portions. This localized difference in geometry allows the preceding engaging portion to be positioned away from the driver, creating a specific functional characteristic that enables deviation correction without affecting the engagement accuracy of other portions.
Solution Approach 2:
The patent employs asymmetry by creating an uneven distribution of outer areas among the engaging portions. The preceding engaging portion has a deliberately reduced outer area compared to subsequent engaging portions, creating an asymmetric configuration that facilitates easier disengagement and automatic correction of engagement deviations.
2Adaptability or versatility
If the outer area of the preceding engaging portion is positioned away from the driver, then the engagement becomes looser allowing easier disengagement, but the structural symmetry of the wheel is compromised
Solution Approach 1:
The patent applies local quality by making the outer area of the preceding engaging portion smaller than that of other engaging portions. This localized difference in geometry allows the preceding engaging portion to be positioned away from the driver, creating a specific functional characteristic that enables deviation correction without affecting the engagement accuracy of other portions.
Solution Approach 2:
The patent segments the wheel's engaging portions into functionally distinct groups: the preceding engaging portion with reduced outer area for correction functions, and other engaging portions with normal outer areas for primary driving functions. This segmentation allows each portion to be optimized for its specific role while maintaining overall wheel integrity.
3Duration of action of moving object
If the driver moves upward in a deviated engagement state, then the driver reaches the upper end position, but the operation becomes unstable due to improper engagement positioning
Solution Approach 1:
The patent implements self-service through the automatic correction mechanism. When the driver moves upward in a deviated state, the reduced outer area of the preceding engaging portion allows it to disengage more easily, enabling the wheel to automatically realign with the proper engagement position without external intervention. The system corrects its own deviation through the inherent design of the engaging portions.
Solution Approach 2:
The patent creates a feedback mechanism where the engagement state of the wheel with the driver continuously influences subsequent engagement. The reduced outer area of the preceding engaging portion provides feedback by facilitating easier disengagement when misalignment occurs, guiding the system back to the proper engagement position for stable operation.
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 ensures stable driving operations by correcting deviated engagements, allowing the driver to return to a proper standby position, thereby maintaining operational stability and preventing interference during subsequent driving cycles.
Implementation Method 1
a piston configured to move in a driving direction owing to a pressure of a gas
Data Source
AI summary
A preceding engaging portion preceding a last engaging portion has a smaller diameter or is positioned further inward than the last engaging portion. Because of this configuration, an engagement of the preceding engaging portion with respect to a last engaged portion becomes more easily disengageable in comparison to the last engaging portions. When the preceding engaging portion disengages from the last engaged portion, the driver moves downward to a standby position. Accordingly, an engagement of the engaging portions with the engaged portions can be properly corrected, such that the last engaging portion engages the last engaged portion at the standby position.