Two-Step Trigger Device for Rivet Gun Airflow Control
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Solution Overview
Problem
Conventional rivet guns with high-pressure air sources continuously output air regardless of operation, leading to unnecessary air consumption and noise, as they cannot selectively control airflow during core pin ejection and vise assembly operation.
Innovation Solution
A two-step trigger device for a rivet gun that activates high-pressure airflow only during core pin ejection and stops airflow during vise assembly operation, utilizing a pneumatic cylinder, inlet channel, outlet hole, valve-driving channel, and a two-step pressing assembly to control air flow and prevent unnecessary air consumption and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-pressure air source constantly outputs air into the rivet gun, then the rivet gun can continuously operate, but unnecessary air consumption and noise occur
Solution Approach 1:
The patent implements periodic action by using a two-step trigger mechanism that controls the high-pressure air source to operate only during specific phases: Step 1 activates air flow for core pin ejection, while Step 2 stops air flow during vise assembly operation. This periodic activation eliminates continuous air consumption while maintaining productivity.
2Productivity
If high-pressure air source constantly outputs air into the rivet gun, then the rivet gun can continuously operate, but noise is generated continuously
Solution Approach 1:
The two-step trigger device controls air flow periodically: air is supplied only during Step 1 (ejection phase) and stopped during Step 2 (riveting phase). This periodic operation eliminates continuous noise generation while maintaining the ability to perform continuous riveting operations.
3Loss of energy
If two-step trigger device is implemented to control air flow selectively, then air consumption and noise are reduced, but device complexity increases
Solution Approach 1:
The trigger device is segmented into two distinct functional steps: Step 1 for activating air flow during ejection, and Step 2 for stopping air flow during riveting. This segmentation allows precise control of air consumption without requiring complex additional components, as the segmentation is achieved through the inherent mechanical structure of the trigger.
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 trigger device ensures efficient air usage by activating airflow only during specific operations, reducing air consumption and noise, and effectively completing riveting tasks with the rivet gun.
Implementation Method 1
the air output by the high-pressure air source flows through the barrel from the front end to the rear end and sucks the broken core pin vised by the vise assembly backward into the collector
Implementation Method 2
The pneumatic cylinder is mounted movably under the handle and capable of activating the vise assembly through pneumatic and hydraulic means. Furthermore, the pneumatic cylinder may be connected to a high-pressure air source such as an air bottle to implement the ejection of the core pin.
Data Source
AI summary
A trigger device is mounted on a rivet gun. The rivet gun has a barrel, a handle and a pneumatic cylinder. The trigger device has an inlet channel defined in the handle, an outlet hole defined through the handle and communicating with the barrel, a valve-driving channel defined in the handle and communicating with the pneumatic cylinder, a space defined in the handle and communicating with the inlet channel, outlet channel and valve-driving channel. A trigger member is mounted on the handle. A two-step pressing assembly is mounted in the space and may be activated to control the rivet gun to eject a core pin of a used rivet or rivet pieces with an unused rivet. High-pressure air from an air source connected to the rivet gun is output only during the ejection operation of the rivet gun to prevent unnecessary air consumption and noise.