Electric Nail Gun Lift Assembly With Buffering Against Piston Bounce
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Solution Overview
Problem
Conventional electric nail guns experience jamming and motor damage due to the bouncing movement of the piston, which causes undesired forces on the lifting gear and motor, leading to potential sticking and damage.
Innovation Solution
The electric nail gun incorporates a lift assembly with a wheel unit, wheel axle unit, buffer unit, and support unit that create gaps and buffer spaces to absorb forces during the piston's bouncing motion, preventing interference with the motor's rotation and reducing jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a damper is disposed in the cylinder to absorb kinetic energy of the piston after striking a nail, then the kinetic energy absorption is improved, but the lifting gear may get stuck with the piston and the motor may be damaged due to bouncing movement
Solution Approach 1:
A buffer member is introduced as an intermediary element between the piston and the lifting gear. This buffer member absorbs the bouncing force of the piston through elastic deformation, preventing direct transmission of impact forces to the lifting gear and motor. The buffer member acts as a mediator that converts harmful kinetic energy into elastic potential energy, thereby protecting the lifting gear from jamming and the motor from damage while maintaining effective kinetic energy absorption.
2Power
If the lifting gear engages the piston to move it in the second direction to compress air, then the air compression function is improved, but the bouncing movement causes jamming between the lifting gear and piston
Solution Approach 1:
The buffer member is pre-installed in the lifting gear assembly to provide cushioning before any bouncing movement occurs. When the piston strikes the damper and bounces back, the buffer member is already in position to absorb the impact force through its elastic properties. This beforehand cushioning prevents jamming between the lifting gear and piston during the air compression cycle, ensuring smooth operation without increasing device complexity.
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
This configuration prevents damage to the motor and reduces jamming, ensuring smooth and reliable operation while maintaining efficient nail-striking functionality.
Implementation Method 1
a buffer unit (7) including a plurality of buffer members (71), each of which is complementary in shape with a combination of a respective one of the grooves (515) and the two slots (516)
Implementation Method 2
an air storage chamber (220) storing air therein, in spatial communication with the cylinder chamber (210)
Data Source
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AI summary
An electric nail gun includes a main body unit (1) and a lift assembly mounted therein and including a wheel unit (5), a wheel axle unit (6), and a buffer unit (7). The wheel unit (5) is rotatable about an axis (L), and includes a plurality of roller members (512) arranged along a circumference surrounding the axis (L), and an inner action surface (514). The wheel axle unit (6) is rotatable about the axis (L), is detachably sleeved on the wheel unit (5), and has an outer action surface (623) movable along the circumference (C), spaced apart from the wheel unit (5), and operable to exert a force on the inner action surface (514) to drive rotation of the wheel unit (5) when being energized. The buffer unit (7) includes a buffer member (71) disposed between the inner and outer action surfaces (514, 623) along the circumference (C).