Reciprocating Tool Handle Coupling for Compact Vibration Isolation
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Solution Overview
Problem
Existing reciprocating tools with vibration-isolating handle structures require a large area in the front-rear direction due to the alignment of coupling and elastic members, leading to increased tool length and potential for larger vibrations.
Innovation Solution
A reciprocating tool design where the body housing and handle member are coupled via movable coupling parts with an elastic member housed within, allowing relative movement in the front-rear direction, absorbing dominant vibrations while minimizing the tool's size in this direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the coupling structure and elastic member are aligned in the front-rear direction, then the vibration isolation function is achieved, but the tool length in the front-rear direction increases
Solution Approach 1:
The elastic member is disposed inside the coupling structure, with the coupling structure forming a hollow space that accommodates the elastic member. This nested arrangement allows the elastic member to be integrated within the coupling structure rather than occupying additional front-rear space, achieving vibration isolation while maintaining a compact tool length.
Solution Approach 2:
The design transitions from a linear front-rear arrangement to a three-dimensional integration where the elastic member is positioned inside the coupling structure. This spatial reorganization utilizes the internal volume of the coupling structure, effectively reducing the tool's front-rear length while preserving the vibration isolation function.
2Object-affected harmful factors
If the handle and body housing are designed to be relatively movable by a larger amount, then the vibration isolation effectiveness is improved, but the tool length in the front-rear direction will increase
Solution Approach 1:
The elastic member is disposed inside the coupling structure, allowing for greater elastic deformation range without increasing the external dimensions of the tool. The hollow space within the coupling structure accommodates the elastic member's movement, enabling larger relative movement between handle and body housing while maintaining a compact overall length.
Solution Approach 2:
The design allows for adjustment of the elastic member's properties and dimensions within the constrained space of the coupling structure. By optimizing the elastic member's parameters (such as wire diameter, coil diameter, and free length), the system achieves the desired relative movement range for effective vibration isolation without increasing the tool's front-rear length.
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 design effectively absorbs vibrations, reduces tool size, and allows for greater relative movement without enlarging the tool, enhancing ease of assembly and reducing vibration transmission.
Implementation Method 1
The elastic member is configured to bias the body housing and the handle member away from each other in the front-rear direction
Data Source
AI summary
A reciprocating tool includes a body housing, a handle member and an elastic member. A first one of the body housing and the handle member includes a first coupling part, while a second one includes a second coupling part. The first coupling part includes an internal space, and an opening that communicates with the internal space and an outside space of the first coupling part. At least a portion of the second coupling part protrudes into the internal space through the opening and is movable relative to the first coupling part in the front-rear direction within the opening. The elastic member is disposed in the internal space and is configured to bias the first coupling part and the second coupling part such that the body housing and the handle member are biased away from each other in the front-rear direction.