Electric Nail Gun Lifting Mechanism for Stable Striker Meshing
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Solution Overview
Problem
Existing electric gas spring nail guns face issues with nail jams, which can lead to transmission element damage and safety hazards due to uncontrolled striker movement, and existing solutions like ratchet locking mechanisms increase complexity.
Innovation Solution
A tool with a simple structure featuring a lifting mechanism using a driving wheel with symmetrical wheel pieces, gear shifting fingers, and advance convex pins to prevent nail jams by ensuring stable meshing engagement between the striker and driving wheel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ratchet locking structure is added to prevent striker out-of-control movement, then safety is improved, but device complexity increases
Solution Approach 1:
The patent extracts the safety function from a complex ratchet locking structure and implements it through a simple gear shifting mechanism. The gear shifting fingers automatically adjust the meshing position of the driving wheel teeth with the striker, eliminating the need for additional locking components while maintaining safety against uncontrolled striker movement.
Solution Approach 2:
The gear shifting fingers act as an intermediary mechanism between the driving wheel and the striker. They mediate the interaction by dynamically adjusting the engagement position, preventing direct interference while maintaining controlled movement, thus avoiding the need for complex locking structures.
2Productivity
If the driving wheel teeth directly mesh with the striker, then transmission efficiency is improved, but nail jam risk increases causing transmission element damage
Solution Approach 1:
The gear shifting fingers perform a preliminary action by pre-positioning the driving wheel teeth relative to the striker before engagement. This preliminary adjustment ensures that the teeth mesh correctly with the striker even when residual pressure exists, preventing nail jams and protecting transmission elements from damage.
Solution Approach 2:
The patent introduces dynamic adjustment through the gear shifting fingers that can move to different positions based on operational conditions. This dynamic mechanism allows the system to adapt to residual pressure conditions and maintain reliable engagement without the rigidity that causes nail jams in fixed-meshing designs.
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
Prevents nail jams and ensures safe operation by maintaining stable meshing engagement, even with residual cylinder pressure, without the need for complex locking mechanisms.
Implementation Method 1
a driving wheel (9) in transmission connection with an electric motor (8) to which the battery pack (5-1) supplies electric power
Implementation Method 2
an electric motor (8) to which the battery pack (5-1) supplies electric power
Implementation Method 3
a lifting mechanism (7), comprising a driving wheel (9) having meshing cylinders (9-2) distributed at intervals by a preset arc length, and a striker (4) having meshing teeth (4-2) distributed at intervals in a length direction
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
Disclosed is a tool for striking a fastener, belonging to the technical field of electric tools, the tool comprising an energy storage mechanism (2), composed of a cylinder (2-2) and a piston (2-1), in a housing (1), wherein the piston (2-1) is connected to a striker (4) extending to a gun nozzle (3), a holding handle (5) is provided on one side of the cylinder (2-2), a nail box (6) is provided on one side of the gun nozzle (3), and a lifting mechanism (7) is provided between the holding handle (5) and the nail box (6); the lifting mechanism (7) includes the striker (4) having meshing teeth distributed at intervals, and a driving wheel (9) having meshing cylinders circumferentially distributed at intervals, with the driving wheel (9) being in transmission connection with an electric motor (8); gear shifting fingers (9-3) radially extend out of opposite sides of the driving wheel (9) at a preset arc length; and a side surface, opposite the meshing teeth, of the striker (4) is provided with an advance convex pin (4-1) capable of meshing with the gear shifting fingers (9-3). Before the meshing cylinder is in lifting engagement with the meshing teeth, the gear shifting fingers (9-3) turn to a meshing and gear shifting position in front of the advance convex pin (4-1); and when the meshing cylinder is in lifting engagement with the meshing teeth, the gear shifting fingers (9-3) turn to shift the advance convex pin (4-1) in order to enable the meshing teeth to be located at a position meshing with the meshing cylinder. The tool has a simple structure, and effectively prevents interference between the re-lifting meshing of the driving wheel and the meshing of the striker.