Impact Tool with Shear Thickening Fluid Shock Absorption
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Solution Overview
Problem
Conventional hammers with rubber impact surfaces can cause injury to operators due to direct transmission of impact force, and existing solutions with shock absorption mechanisms are complex, costly, and difficult to assemble.
Innovation Solution
An impact tool with a rubber housing containing shear thickening non-Newtonian fluid as a filler, which absorbs impact force and features a simple structure, combined with a handle design that includes a metal base and cover for stability and ease of assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a hollow hammer head with shock absorption mechanism (steel balls, iron sand, springs) is used, then impact force absorption is improved, but device complexity and cost increase
Solution Approach 1:
The patent changes the physical state and rheological parameters of the filler material by using shear thickening non-Newtonian fluid instead of traditional solid shock absorption elements. This fluid changes its viscosity in response to shear rate, providing shock absorption during impact while maintaining a simple fluid-filled structure without mechanical components.
Solution Approach 2:
The patent employs a composite material system consisting of rubber as the housing material and shear thickening non-Newtonian fluid as the filler. This combination provides both structural integrity from the rubber and dynamic shock absorption from the fluid's shear thickening properties, eliminating the need for complex internal mechanisms.
2Object-affected harmful factors
If a hollow hammer head with shock absorption mechanism is used, then impact force absorption is improved, but manufacturing cost increases
Solution Approach 1:
The patent extracts and eliminates the complex shock absorption mechanism (steel balls, iron sand, springs) from the hammer head design, retaining only the essential rubber housing structure. The shock absorption function is achieved passively through the shear thickening fluid's inherent properties rather than active mechanical components.
Solution Approach 2:
The patent uses a simple rubber housing filled with shear thickening fluid, which can be manufactured more economically than complex hollow structures with internal mechanisms. The fluid-filled design allows for simpler manufacturing processes and potential cost advantages despite the specialized fluid material.
3Object-affected harmful factors
If a hollow hammer head with shock absorption mechanism is used, then impact force absorption is improved, but weight increases and assembly becomes difficult
Solution Approach 1:
The patent changes from solid shock absorption elements (steel balls, iron sand) to a fluid medium, which can provide equivalent or superior shock absorption with reduced density. The shear thickening non-Newtonian fluid offers dynamic viscosity adjustment that can absorb impact energy more efficiently per unit mass.
Solution Approach 2:
The rubber housing combined with shear thickening fluid creates a composite structure that provides shock absorption with potentially lower overall weight compared to metal-based shock absorption mechanisms. The fluid's ability to transmit and dissipate energy dynamically allows for lighter construction.
4Object-affected harmful factors
If a rubber housing with shear thickening non-Newtonian fluid filler is used, then impact force absorption is improved, but structure complexity increases
Solution Approach 1:
The patent utilizes the shear thickening parameter change of the non-Newtonian fluid, which increases its viscosity in response to applied shear stress during impact. This passive parameter change provides automatic shock absorption adjustment without requiring complex control mechanisms or structural modifications.
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 impact tool effectively absorbs impact force, preventing operator injury while maintaining a simple and durable design, reducing the risk of damage to impacted objects and enhancing user safety.
Implementation Method 1
The filler is shear thickening non-Newtonian fluid
Data Source
AI summary
An impact tool is provided, including a working portion and a handle. The working portion includes a housing which is made of rubber and a filler. The housing defines an inner space, and the filler is stuffed with the inner space. The filler is shear thickening non-Newtonian fluid. The handle is connected with the working potion.