Compact Driving Tool Pressure Accumulator Design
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Solution Overview
Problem
The size of driving tools equipped with a rotary compressor increases due to the inclusion of this component, leading to a larger tool footprint.
Innovation Solution
A driving tool design that incorporates a pressure accumulator with a movable member to reduce the volume of a pressure chamber, a switching valve to control gas supply, and an auxiliary pressure accumulator to maintain pressure, allowing for a more compact structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a rotary compressor is provided in the housing to compress and supply air to the pressure accumulator, then the air supply function is achieved, but the size of the driving tool increases
Solution Approach 1:
The pressure chamber is merged with the pressure accumulator by forming them as a single integrated structure within the housing. The pressure chamber accommodates compressible gas that is directly supplied to the pressure accumulator, eliminating the need for a separate rotary compressor and its associated supply pipes and electromagnetic valves. This integration significantly reduces the overall size of the driving tool while maintaining the air supply function.
Solution Approach 2:
The rotary compressor, supply pipe, and electromagnetic valve are extracted from the system. Instead of using these separate components to compress and supply air, the invention uses a simplified structure where the pressure chamber directly provides compressible gas to the pressure accumulator, removing unnecessary components and reducing tool size.
2Manufacturing precision
If a rotary compressor with supply pipe and electromagnetic valve is used, then air compression and supply control is achieved, but the device complexity increases
Solution Approach 1:
The pressure chamber and pressure accumulator are combined into a single integrated structure, eliminating the need for separate compression and storage components. This merging reduces the number of parts and simplifies the overall device structure while maintaining air compression and supply control functionality.
Solution Approach 2:
The electromagnetic valve and supply pipe are extracted from the system. The invention achieves air supply control through the integrated pressure chamber-accumulator structure without requiring separate control valves and piping, thereby reducing 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
The solution effectively suppresses the increase in size of the driving tool, maintaining efficiency and functionality while reducing its overall dimensions.
Implementation Method 1
The pressure accumulator is filled with compressed air
Implementation Method 2
a movable member which is provided in the casing and capable of being operated to reduce a volume of the pressure chamber
Data Source
AI summary
This driving tool includes: a pressure accumulator (26) in which a compressible gas is accumulated; a striking part which operates in a first direction to strike a fastener with a pressure of the compressible gas; and a driving part which causes the striking part to operate in a second direction opposite to the first direction and to increase the pressure of the pressure accumulator (26). The driving tool further includes: a cylinder chamber (98) in which the compressible gas to be supplied to the pressure accumulator (26) can be contained; a holder (44) forming the pressure accumulator (26) and the cylinder chamber (98); a piston (97) which is disposed in the holder (44) and is operable to reduce the volume of the cylinder chamber (98); and a switching valve (92) capable of connecting and disconnecting the cylinder chamber (98) and the pressure accumulator (26).