Nailer Gear-Wedge Mechanism for Tooth-Lug Misalignment Control
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Solution Overview
Problem
Conventional pneumatic fastener tools, such as nail guns, suffer from complex internal structures and are prone to nail jamming, which complicates maintenance and can cause significant downtime.
Innovation Solution
A fastener tool with a drive mechanism that includes a gear system with a wedge mechanism to prevent misalignment between the gear and piston, and a solenoid-latch system to secure the piston during jamming, reducing mechanical interference and facilitating easy nail removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a two-cylinder configuration with pinion and rack is used for energy accumulation and striking, then the tool can achieve powerful kinetic energy for fastener driving, but the internal structure becomes very complicated and is prone to nail jamming
Solution Approach 1:
The patent extracts and eliminates the pinion and rack components from the conventional two-cylinder configuration. Instead of using a pinion-rack mechanism to convert rotational motion to linear motion, the invention uses a directly coupled motor that drives the piston through a simplified connection, removing the intermediate传动 components that caused complexity and jamming issues.
Solution Approach 2:
Rather than using a complex mechanical transmission system (pinion-rack) to achieve linear motion from rotational motor output, the invention inverts the approach by directly coupling the motor to the piston assembly, allowing the motor's rotational output to be directly converted to piston linear motion through a simplified mechanical arrangement.
2Productivity
If conventional pneumatic tools are used, then fastener driving function is achieved, but nail jamming occurs frequently which costs significant time for removal
Solution Approach 1:
The patent introduces a wedge-shaped intermediary component that acts as a mediator between the piston and the fastener ejection path. This wedge component ensures proper alignment and timing of the piston stroke with the fastener ejection mechanism, preventing misalignment that causes nail jamming while maintaining high-speed operation.
Solution Approach 2:
The invention implements preliminary alignment and positioning actions through the wedge mechanism before the actual fastener ejection occurs. The wedge ensures that the piston is correctly positioned and aligned with the ejection path in advance, preventing jamming conditions from developing during the high-speed firing operation.
3Strength
If complex internal structure is used for energy accumulation and striking, then powerful striking capability is achieved, but maintenance becomes complicated and difficult
Solution Approach 1:
The patent segments the tool into distinct functional modules: a simplified motor-driven piston assembly, a separate wedge alignment mechanism, and a fastener ejection system. This segmentation allows each component to be independently accessed, inspected, and maintained, significantly easing repair complexity while preserving the powerful striking capability of the overall system.
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 solution simplifies the tool's internal structure, reduces nail jamming frequency, and minimizes damage to mechanical parts, making maintenance easier and safer.
Implementation Method 1
the gear body includes a first cam surface and the wedge includes a second cam surface, wherein the wedge is configured to shift the gear laterally outward from the blade along the rotational axis within the period
Implementation Method 2
a cylinder filled with compressed gas, wherein the piston is accommodated in the cylinder and suitable for a reciprocating motion within the cylinder; This cylinder-piston configuration is commonly referred to as 'gas spring'
Implementation Method 3
it is necessary to firstly compress the high-pressure gas in a cylinder to a certain extent so that the piston is in position
Implementation Method 4
the gear includes a plurality of teeth adapted to engage with a plurality of lugs on the blade such that a rotation of the gear is transformed to a linear movement of the blade
Implementation Method 5
an electric motor is generally used to drive an accumulator piston through a pinion and a rack
Data Source
AI summary
A fastener tool includes a motor, a drive mechanism connected to the motor and adapted to drive a piston, and a cylinder filled with compressed gas. The piston is accommodated in the cylinder and suitable for a reciprocating motion within the cylinder. The drive mechanism includes a blade fixed to the piston, and a gear coupled to the motor. The gear contains a plurality of teeth adapted to engage with a plurality of lugs on the blade such that a rotation of the gear is transformed to a linear movement of the blade. The drive mechanism further includes a wedge which, within a period of a rotation cycle of the gear, is configured to prevent one of the plurality of teeth from engaging with a misaligned one of the lugs of the blade by shifting the gear laterally outward from the blade.