Springless Rivet Gun Handle Assembly Pneumatic Control
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Solution Overview
Problem
Conventional rivet guns with recoil springs in the handle assembly increase manufacturing complexity and cost, and the springs fatigue over time, leading to control valve failure in opening and closing.
Innovation Solution
A handle assembly for a rivet gun that operates the control valve without springs, using a design with an annular shoulder, air inlet channel, airflow passageway, inlet hole, mounting hole, communication hole, and exhaust hole, where the control valve is controlled by high-pressure air, simplifying fabrication and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a recoil spring is used in the handle assembly to operate the control valve, then the control valve can be opened and closed reliably, but the manufacturing complexity and cost increase
Solution Approach 1:
The invention removes the recoil spring from the handle assembly, extracting the problematic component that caused manufacturing complexity and reliability issues. The control valve operation is achieved without the spring through direct pneumatic actuation by high-pressure air from the air inlet channel.
Solution Approach 2:
The invention uses high-pressure air flowing through the air inlet channel and airflow passageway to directly actuate the control valve, replacing the mechanical spring system with a pneumatic system. This eliminates the need for spring compression and elongation cycles, solving both the manufacturing complexity and reliability problems.
2Reliability
If a recoil spring is used in the handle assembly, then the control valve can be actuated, but the manufacturing cost increases
Solution Approach 1:
By removing the recoil spring component entirely, the invention reduces the number of parts that need to be manufactured, assembled, and quality-checked, thereby lowering manufacturing costs while maintaining control valve actuation functionality through pneumatic means.
Solution Approach 2:
The high-pressure air system serves dual purposes: it powers the riveting operation and simultaneously actuates the control valve. This self-service approach eliminates the need for a separate spring mechanism, reducing manufacturing complexity and cost.
3Ease of operation
If a recoil spring is used in the handle assembly, then the control valve can be operated, but the spring ages and fatigues causing valve failure
Solution Approach 1:
Replacing the mechanical spring system with a pneumatic actuation system using high-pressure air eliminates the fatigue and aging problems associated with repetitive spring compression and elongation. The pneumatic system has no moving parts subject to mechanical fatigue, significantly extending the service life of the handle assembly.
Solution Approach 2:
The invention substitutes the mechanical spring system with a pneumatic control mechanism. This replacement eliminates the inherent limitations of mechanical springs (fatigue, aging, elastic limit) and provides a more durable solution for long-term 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
The solution eliminates the need for additional springs, simplifying the handle assembly's structure and reducing manufacturing costs while maintaining reliable operation of the control valve, improving production efficiency and extending the lifespan of the rivet gun.
Implementation Method 1
When the trigger is pressed, ambient air flows into the handle and pushes a valve shaft of the control valve such that the control valve is opened
Implementation Method 2
The control valve is controlled by high pressure without additional springs such that the fabrication and structure of the handle assembly are simplified
Data Source
AI summary
A handle assembly for a rivet gun has a handle, a trigger and a control valve. The handle has an annular shoulder, an air inlet channel, an airflow passageway, an inlet hole, a mounting hole, a communication hole and an exhaust hole. The trigger is mounted in the handle and controls the communication between the air inlet channel and airflow passageway. The control valve is mounted in the mounting hole of the handle and has a stopper, a casing and a valve shaft. The control valve is controlled by high pressure without additional springs such that the fabrication and structure of the handle assembly are simplified and the fabricating and manufacturing cost is lowered.