Driving Tool Lift Mechanism Wheel Eccentric Position
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Solution Overview
Problem
Gas-spring type driving tools face issues with the lift mechanism failing to properly engage driven members when they become jammed or deformed, leading to incomplete driving operations and difficulty in returning to a normal operational state.
Innovation Solution
The driving tool incorporates a lift mechanism with a wheel that can move between an initial and eccentric position, allowing for continuous operation even when interference occurs, using a biasing member to facilitate smooth engagement and disengagement of engaging portions with the driver, ensuring successful upward return of the driver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wheel is fixed at the initial position, then the engaging portions can reliably engage the engaged portions during normal operation, but the engaging portions cannot accommodate interference when the driver stops at abnormal positions
Solution Approach 1:
The wheel is designed to be movable between an initial position and an eccentric position, transitioning from a fixed state to a dynamic adjustable state. This allows the wheel to adapt its position based on operational conditions, accommodating both normal and abnormal driver positions to prevent interference between engaging portions and engaged portions.
2Adaptability or versatility
If the wheel is made movable between initial and eccentric positions, then the engaging portions can accommodate interference and maintain operation, but the device complexity increases
Solution Approach 1:
The wheel is equipped with a biasing member that automatically pushes the wheel toward the initial position without requiring external control systems. This self-regulating mechanism allows the wheel to autonomously adjust its position based on operational conditions, reducing the need for complex control systems while maintaining adaptability.
3Device complexity
If the engaging portions are rigidly fixed, then the structure is simple, but the engaging portions cannot smoothly disengage when interference occurs
Solution Approach 1:
The wheel's ability to move between positions allows the engaging portions to dynamically adjust their engagement state. When interference occurs, the wheel can shift to the eccentric position, enabling smooth disengagement of the engaging portions from the engaged portions, thereby maintaining ease of operation without complicating the overall structure.
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 enables the driving tool to maintain proper operation and successful return of the driver despite jamming or deformation, ensuring efficient and successive driving operations.
Implementation Method 1
a piston that moves in a driving direction by a pressure of a gas
Implementation Method 2
a biasing member that pushes the wheel toward the initial position
Data Source
AI summary
A driving tool includes a piston, a driver, and a lift mechanism. The piston moves in a driving direction by a pressure of a gas. The driver extends from the piston and includes a plurality of engaged portions. The lift mechanism moves the driver in a direction opposite to the driving direction. The lift mechanism includes a rotation shaft, a wheel, a plurality of engaging portions, and a supporting member. The wheel rotates integrally with the rotation shaft. Each of the plurality of engaging portions may engage an engaged portion. The supporting member supports the wheel so the wheel is allowed to move between an initial position and an eccentric position in a radial direction of the rotation shaft.