Lift Assembly Buffer Unit Prevents Piston Bounce Jamming
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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 sticking and potential damage.
Innovation Solution
A lift assembly with a wheel unit, wheel axle unit, and buffer unit is introduced, featuring a rotatable wheel unit with roller members and a buffer unit to absorb forces, preventing undesirable rotation and reducing jamming, while maintaining smooth operation and extending motor life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the lifting gear engages the piston to move it in the second direction to compress air in the cylinder, then air compression function is achieved, but bouncing movement of the piston in the first direction causes jamming between the lifting gear and the piston and exerts undesired force on the motor
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 movement and kinetic energy of the piston, preventing direct contact and jamming between the piston and lifting gear, while still allowing the lifting gear to effectively compress air in the cylinder
Solution Approach 2:
The buffer member is positioned in advance to cushion the piston's bouncing movement before it can cause damage to the lifting gear or motor. This preemptive cushioning absorbs the kinetic energy and prevents the undesired forces from being transmitted to the motor
2Productivity
If the piston strikes the nail and then impacts the damper, then the nail striking function is completed, but the piston bounces back and forth causing jamming and potential motor damage
Solution Approach 1:
The buffer member converts the harmful bouncing movement and kinetic energy of the piston into beneficial cushioning action. By absorbing the bounce, the buffer member prevents damage to the lifting gear and motor while allowing the piston to complete its striking function efficiently
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 lift assembly effectively prevents jamming and motor damage by absorbing forces, ensuring smooth and reliable operation, and allows easy maintenance of air pressure without full disassembly.
Implementation Method 1
a buffer unit (7) including at least one buffer member (711) disposed between the inner action surface (514) and the outer action surface (623) along the circumference
Implementation Method 2
A selected one of the plurality of roller members (512) is adapted to detachably engage the driven protrusion (321) of the strike pin (32) to thereby drive the strike pin (32) from the post-striking position to the pre-striking position
Implementation Method 3
The wheel axle unit (6) is rotatable about the axis (L), is detachably sleeved on a portion of the wheel unit (5), and has an outer action surface movable along the circumference, 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 the axle unit is energized
Implementation Method 4
a cylinder unit (2) that is mounted to the main body unit (1), that stores air therein, and that is isolated from an external environment during the striking cycle
Data Source
AI summary
A lift assembly for use in an electric nail gun includes a wheel unit, a wheel axle unit, and a buffer unit. The wheel unit is rotatable about an axis, and includes a plurality of roller members arranged along a circumference surrounding the axis, and an inner action surface. The wheel axle unit is rotatable about the axis, is detachably sleeved on a portion of the wheel unit, and has an outer action surface movable along the circumference, spaced apart from the wheel unit, and operable to exert a force on the inner action surface to drive rotation of the wheel unit when the wheel axle unit is energized. The buffer unit includes a buffer member disposed between the inner action surface and the outer action surface along the circumference.