Pneumatic Nailing Gun Venting Structure for Stable Force Adjustment
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Solution Overview
Problem
Existing pneumatic nailing guns struggle with long-term precision in nailing force adjustment due to the degradation of spring or sensor mechanisms over time.
Innovation Solution
A pneumatic nailing gun design featuring a first and second air cylinder with a ventilation channel, an adjustable air hole for communication with the outside, and a handle to control ventilation capacity, allowing precise nailing force adjustment through static ventilation without dynamic movement, ensuring long-term precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spring force adjustment or sensor program control adjustment is used for nailing force adjustment, then the nailing force can be adjusted, but long-term precision cannot be kept as the spring or sensor precision degrades gradually over time
Solution Approach 1:
The patent replaces the mechanical spring-based force adjustment system with a pneumatic pressure control system. Instead of using a spring whose force degrades over time, the system uses compressed air pressure regulated by a balance valve to control the piston's nailing force. This substitution eliminates the precision degradation issue inherent in mechanical springs while maintaining adjustable force capability.
Solution Approach 2:
The patent changes the control parameter from mechanical spring compression (physical deformation) to pneumatic pressure (gas state parameter). By regulating the air pressure through the balance valve, the system can precisely control the nailing force without the precision loss that occurs with prolonged use of mechanical components. The pressure parameter can be adjusted and maintained consistently over time.
2Measurement precision
If a balance valve is arranged on the air path to adjust nailing force, then the nailing force can be precisely adjusted, but the high pressure air source must be connected through an air pipe and the gun cannot move freely
Solution Approach 1:
The patent merges the air source function into the nailing gun itself by integrating a compressed air tank directly into the gun body. This combination eliminates the need for external air pipes and separate air sources, allowing the gun to move freely while maintaining the balance valve's precision pressure control capability. The merged design provides both portability and precise force adjustment.
Solution Approach 2:
The patent introduces a built-in compressed air tank as an intermediary between the user and the nailing operation. This intermediary stores compressed air internally, serving as a portable high-pressure air source that eliminates the need for external connections. The balance valve continues to regulate this internally stored pressure, maintaining precision control while enabling free movement.
3Loss of energy
If the pneumatic structure is completely closed to prevent air leakage, then air loss is minimized, but the motor cannot run steadily during the return stroke due to insufficient air replenishment
Solution Approach 1:
The patent applies preliminary action by pre-compressing air into the tank during the piston's compression stroke. This stored compressed air is then released during the return stroke to maintain steady motor operation. The balance valve controls the timing and amount of air release, ensuring the motor receives consistent pressure throughout the cycle while minimizing overall air loss through the controlled air hole.
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 design maintains precise nailing force adjustment over time by using a static ventilation structure and controlled air discharge/replenishment, enhancing motor stability and reducing noise during operation.
Implementation Method 1
the first piston performs the compression stroke to compress air in the first air chamber
Implementation Method 2
when the second piston is located in the second position and the firing pin is unlocked by the locking member, the first piston performs the return stroke to make the second piston return to the first position
Data Source
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AI summary
The utility model provides a pneumatic nailing gun with an adjustable nailing force, it solves the technical problem that a nailing force adjusting precision of an existing pneumatic nailing gun cannot be kept for a long time. The pneumatic nailing gun comprises a shell and a firing pin, a first air cylinder and a second air cylinder are further arranged in the shell, and the first air chamber and the second air chamber are communicated with each other through a fully-closed ventilation channel, so that the first air chamber, the ventilation channel and the second air chamber form a pneumatic structure closed relative to the outside, and an air hole capable of keeping the pneumatic structure in communication with the outside is arranged in the pneumatic structure, and a handle capable of adjusting a ventilation capacity between the air hole and the outside is arranged on the shell.