Gas Spring Fastener Driver for Faster Startup Response
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Solution Overview
Problem
Existing nail guns, whether mechanical spring-loaded or compressed air-driven, require one compression stroke to store energy before driving a fastener, leading to inefficient startup response times.
Innovation Solution
A fastener driver incorporating a gas spring mechanism with a first cylinder for gas replenishment and a second cylinder for gas release, utilizing a first piston with unbalanced air pressures to enable faster startup response by pre-compressing gas during the striking member's stop position, powered by an electric motor controlled by a controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a compression stroke is required to store energy before driving a fastener, then the fastener driver can generate sufficient striking force, but the startup response time increases and firing efficiency decreases
Solution Approach 1:
The gas spring mechanism pre-compresses gas during the stop position of the striking member, storing energy in advance. When firing is needed, the pre-compressed gas immediately drives the striking member, eliminating the need for a separate compression stroke and reducing startup response time.
Solution Approach 2:
The gas spring mechanism automatically maintains pre-compressed gas during the stop position without requiring external energy input or additional operational steps. The system serves itself by utilizing the stop position to recharge the gas spring, making the energy storage process automatic and continuous.
2Use of energy by moving object
If a compression stroke is required to store energy, then sufficient energy can be accumulated for striking, but the firing frequency and productivity are reduced
Solution Approach 1:
The gas spring mechanism maintains continuous energy availability by pre-compressing gas during every stop position. This creates a continuous cycle where energy is stored during idle time and immediately released for firing, enabling continuous high-frequency operation without interrupting the firing rhythm for energy accumulation.
3Device complexity
If mechanical spring or gas spring is used for driving, then the structure is simple, but the startup response speed is slow due to required compression stroke
Solution Approach 1:
The gas spring is pre-compressed during the stop position, performing the energy storage action in advance. This preliminary action eliminates the delay associated with compression strokes, allowing the striking member to immediately respond to firing commands while maintaining the simple mechanical 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
The solution allows for faster and more efficient driving of fasteners by pre-compressing gas during the striking member's stop position, enhancing the startup response speed and enabling continuous firing without the need for additional compression strokes.
Implementation Method 1
a power mechanism including a gas spring mechanism for driving the striking member
Implementation Method 2
When the striking member is at the stop position, the air pressure on one side of the first piston is different from the air pressure on the other side of the first piston
Implementation Method 3
pre-compressing gas during the striking member's stop position
Implementation Method 4
powered by an electric motor controlled by a controller
Data Source
AI summary
A fastener driver includes a first cylinder including first cylinder holes through which the external gas is replenished into the first cylinder; and a second cylinder including second cylinder holes through which the gas in the second cylinder is released to the outside. The first cylinder communicates with the second cylinder. A first piston is disposed in the first cylinder. When a striking member is at a stop position, the air pressure on one side of the first piston is different from the air pressure on the other side of the first piston.