Striking Tool Polymer Shock Absorption
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Solution Overview
Problem
Conventional striking tools cause operator fatigue and risk of injury due to incomplete shock absorption, as shock waves propagate through the tool and into the hand and arm during use.
Innovation Solution
Incorporating a polymer material part and a fluid, such as air or oil, between the handle and active part to absorb and dissipate shock waves, improving comfort and reducing long-term injury risk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an envelope of elastomeric material is provided on the handle to absorb shock, then some shock absorption is achieved, but the shock wave still propagates along the longitudinal axis and only partially protects the operator
Solution Approach 1:
A polymer material element is introduced as an intermediary component between the active part and the handle. This polymer element acts as a mediator that intercepts the shock wave generated during striking operations and transforms it into deformable energy, preventing the shock wave from propagating directly through the handle to the operator's hand.
Solution Approach 2:
The shock absorption mechanism utilizes the viscoelastic properties of polymer material, which changes its mechanical parameters (stiffness, damping capacity) based on the applied stress and strain rate. During impact, the polymer element undergoes temporary deformation, absorbing shock energy through parameter changes in its material properties.
2Object-affected harmful factors
If shock absorption means are placed between the active part and handle, then shock wave damping is improved, but the complexity of the tool structure increases
Solution Approach 1:
The polymer material element is integrated directly into the handle structure, merging the shock absorption function with the handle itself. This integration approach combines multiple functions (structural support and shock absorption) into a single unified component, reducing the overall number of separate parts while maintaining effective shock wave damping.
3Strength
If conventional metallic materials are used for both handle and active part, then structural strength is maintained, but operator fatigue and injury risk increase due to shock wave propagation
Solution Approach 1:
The tool employs a composite material strategy by incorporating a polymer material element within the metallic handle structure. This composite approach combines the high strength and rigidity of metal with the shock-absorbing viscoelastic properties of polymer, creating a multi-material system that simultaneously maintains structural integrity and reduces shock wave transmission to the operator.
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 described solution effectively dampens and absorbs shock waves, reducing their transmission to the operator and enhancing user comfort and safety over extended use periods.
Implementation Method 1
a part made of polymer material arranged in direct contact with the active part
Implementation Method 2
the shock wave is damped and absorbed by the part made of elastomer material
Implementation Method 3
a fluid, such as air or oil, which is contained between the part made of polymer material and the handle
Data Source
Figure 1~2
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AI summary
The invention relates to a striking tool (1), comprising: a handle (10) elongated along a longitudinal direction and designed to hold the tool (1), and an active part (20) assembled with the handle (10) and designed to strike a target element. The tool (1) includes shock-absorbing means (30) interposed between the handle (10) and the active part (20) along the longitudinal direction of the tool (1). The invention also relates to a method for manufacturing such a tool (1).