Nail Gun Firing Pin Locking Mechanism
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Solution Overview
Problem
Nail guns experience unsatisfactory reliability due to lock failure of the firing pin, leading to inconsistent performance and reduced stability.
Innovation Solution
The nail gun design incorporates a locking mechanism comprising a second piston and a locking member that engages with a locking portion on the first piston and firing pin, allowing for precise control over the locking and releasing of the firing pin, enhancing reliability and stability by reducing vibration and power sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a groove or the like is used to lock the firing pin, then the structure is simple, but the locking reliability is unsatisfactory and lock failure occurs easily
Solution Approach 1:
A locking member is introduced as an intermediary component between the first piston and the firing pin. This locking member engages with a locking portion on the first piston and the firing pin to provide reliable locking. The intermediary locking member resolves the contradiction by providing positive mechanical engagement without requiring complex grooves or modifications to the firing pin structure itself.
Solution Approach 2:
The locking function is segmented into separate components: the locking member and the locking portion. Instead of using a single integrated groove structure, the locking mechanism is divided into distinct elements that can engage and disengage independently. This segmentation improves reliability by allowing the locking member to provide consistent mechanical engagement while simplifying the overall design.
2Reliability
If multiple power sources are used to control the locking and releasing mechanisms, then the locking control is precise, but the number of power sources increases and machine volume increases
Solution Approach 1:
The second piston serves multiple functions: it drives the locking member for locking control and also drives the first piston for the impacting action. By making the second piston multi-functional, the system achieves precise locking control without requiring separate power sources, thereby reducing machine volume while maintaining control precision.
Solution Approach 2:
The locking mechanism and the impacting mechanism are merged into a single integrated system driven by the second piston. The second piston simultaneously controls both the locking member engagement and the first piston movement. This merging eliminates the need for additional power sources while maintaining precise control over the locking and releasing operations.
Data Source
AI summary
Provided is a nail gun, including: a housing, a firing pin, a prime mover, a first cylinder, a first piston, a second cylinder, a second piston, and a locking member. A first chamber is defined in the first cylinder, the first piston is disposed in the first chamber and is fixedly connected to the firing pin, the second cylinder is formed with the second chamber that is in communication with the first chamber. The second piston is disposed in the second chamber and operative to be driven by the prime mover to perform a reciprocating motion between a first position and the second position along a first straight line. The locking member is configured for locking or releasing the first piston in the first chamber, and the first piston is formed or connected with: a locking portion configured for engaging with the locking member. When the second piston is at the first position, the locking member is operative to be engaged with the locking portion to lock the first piston within the first chamber, and when the second piston is at the second position, the prime mover is operative to drive the locking member out of engagement with the locking portion to release the first piston within the first chamber.