Drive Blade Lubrication Assembly for Powered Fastener Drivers
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Solution Overview
Problem
Existing pneumatic fastener drivers lack a mechanism to reduce friction between the drive blade and the blade seal, leading to reduced performance and shorter blade life due to lack of lubrication.
Innovation Solution
A powered fastener driver with a blade seal assembly and a lubricant storing device that applies grease oil to the drive blade, ensuring continuous lubrication and minimizing friction between the blade and seal, even after long usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If no blade lubrication mechanism is provided, then the device structure remains simple, but friction between the drive blade and blade seal increases leading to reduced blade life and performance
Solution Approach 1:
The lubrication assembly pre-applies lubricant to the drive blade surface before the blade engages with the blade seal. The lubricant is stored in a reservoir and delivered through a delivery mechanism that coats the blade surface in advance, ensuring lubrication is present before friction begins, thereby extending blade life without requiring complex continuous lubrication systems
Solution Approach 2:
The lubrication assembly is designed to automatically replenish and maintain lubricant on the drive blade without external intervention. The system uses the blade's own movement through the piston to distribute and replenish lubricant, creating a self-sustaining lubrication system that extends blade life while adding minimal structural complexity
2Duration of action of moving object
If continuous lubrication is applied to the drive blade, then friction is reduced and blade life is extended, but the device structure becomes more complex
Solution Approach 1:
The lubrication assembly delivers lubricant in periodic intervals rather than continuously. As the drive blade moves through the piston, the lubricant is replenished at regular intervals corresponding to the blade's position in its stroke, providing continuous lubrication coverage while using a simpler periodic delivery mechanism instead of a complex continuous supply system
Solution Approach 2:
The lubrication mechanism applies lubricant only to the specific contact surface between the drive blade and blade seal where friction occurs. The lubricant is delivered locally to the blade surface at the interface region, providing targeted lubrication that extends blade service duration without requiring a complex system that would lubricate entire blade surfaces or mechanisms
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 extends the life cycle of the nailer blade by maintaining lubrication, allowing maximum force to be applied to fasteners over time, reducing wear and tear and maintaining performance.
Implementation Method 1
a blade lubrication assembly which includes a lubricant applying member adapted to apply lubricant to a portion of the drive blade
Implementation Method 2
a reciprocating piston configured within the cylinder to create a pressure differential, a drive blade at least partially accommodated in the cylinder and operable to drive a fastener upon a driving force resulted from the pressure differential
Data Source
AI summary
A drive blade lubrication assembly for use in a powered fastener driver (10). The powered fastener driver (10) contains a drive blade (42) which snap-fits with a reciprocating piston (58) by a blade seal (103) assembly. The drive blade lubrication assembly contains a lubricant applying member adapted to apply lubricant to a portion of the drive blade (42); and a lubricant storing device which is in fluid communication with the lubricant applying member. The lubricating storing device is adapted to replenish the lubricant in the lubricant applying member. A powered fastener driver (10) containing a drive blade lubrication assembly is also described. The use of the lubricant storing device in the present invention ensures that lubricant is continuously supplied to the drive blade (42) after long time usage of the powered fastener driver (10), so that friction between the drive blade and the blade seal assembly is minimized.