Gas Combustion Driving Tool Spring Nesting for Compact Design
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Solution Overview
Problem
Conventional gas combustion-type driving tools are hindered by increased height and size due to the placement of spring members, complicating maintenance and operation in narrow spaces.
Innovation Solution
The elastic member is positioned between the movable sleeve and the cylinder head, eliminating the need for dedicated space beneath the driving cylinder, allowing for a more compact design and easier maintenance by allowing the elastic member to be exchanged without detaching the driving cylinder.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the spring member is provided beneath the driving cylinder, then the movable sleeve can be biased downward, but the entire height of the tool becomes high due to the need for dedicated space
Solution Approach 1:
The spring member is merged with the nose portion structure, combining the biasing function with the existing structural component. The spring is disposed within the nose portion rather than requiring separate dedicated space beneath the driving cylinder, thereby integrating multiple functions into a compact arrangement that reduces overall tool height.
2Force
If the spring member is provided on the front surface of the nose portion or around the driving cylinder, then the movable sleeve can be biased, but the size around the nose portion becomes larger requiring a protection cover
Solution Approach 1:
The spring member is nested within the hollow internal space of the nose portion. The nose portion is designed with a hollow structure that accommodates the spring member internally, allowing the spring to be positioned without increasing the external dimensions of the nose portion, thus eliminating the need for additional protection covers.
3Force
If the spring member is provided beneath the driving cylinder, then the movable sleeve can be biased downward, but the exchanging procedure of the spring member becomes complicated and troublesome
Solution Approach 1:
The spring member is extracted from the complex assembly structure and positioned in a location that allows independent access. By placing the spring within the nose portion that can be detached as a separate unit, the spring can be accessed and replaced by simply removing the nose portion, eliminating the need to disassemble the entire driving cylinder assembly or other complex procedures.
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 reduces the tool's height and diameter, enhancing operability in narrow spaces and simplifying maintenance by enabling easy replacement of the elastic member without complex procedures.
Implementation Method 1
An elastic member is disposed between the movable sleeve and the cylinder head and biases the movable sleeve downward
Implementation Method 2
When mixed gas of combustible gas and air is burnt explosively within the combustion chamber, high-pressure combustion gas acts on the driving piston to thereby impulsively drive the piston
Data Source
AI summary
A driving piston 7 is provided so as to be slidable in an up-down direction within a driving cylinder 6 disposed within a body 1. A movable sleeve is fitted on the outer peripheral side of the driving cylinder 6 on the cylinder so as to be movable in the up-down direction. When the movable sleeve 11 is moved upward to abut against a cylinder head 10 provided in the upper direction, a sealed combustion chamber 5 is formed. When combustible mixed gas is explosively burnt within the combustion chamber 5, high-pressure combustion gas acts on the driving piston 7 to thereby impulsively drive the piston, whereby a fastener is driven out by a driver 8 coupled on the lower surface side of the driving piston 7. Elastic members 15 are disposed between the movable sleeve 11 and the cylinder head 10. The elastic members 15 bias the movable sleeve 11 downward.