Deformable Retainer Ring for Impact Tool Anvil
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Solution Overview
Problem
Impact tools with metal anvil springs are susceptible to corrosion and failure in certain environments, which affects their reliability and longevity.
Innovation Solution
A deformable retainer ring made of flexible non-metal material, such as rubber, is used around the anvil to support ball detents, allowing for deformation to accommodate tool insertion and retention, reducing corrosion and failure risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal anvil spring is used to support ball detents, then the structural strength and load-bearing capacity are improved, but corrosion resistance and reliability in certain environments deteriorate
Solution Approach 1:
The patent replaces the metal anvil spring with a deformable retainer ring made of flexible non-metal material. This substitution eliminates the corrosion problem associated with metal springs while maintaining the functional capability of supporting ball detents through elastic deformation of the flexible material.
Solution Approach 2:
The patent changes the material parameter from metal to flexible non-metal material, fundamentally altering the properties of the spring component. This material change enables the retainer ring to deform elastically under load, providing the necessary mechanical function without the corrosion susceptibility of metal.
2Strength
If a rigid anvil spring is used, then the load-bearing capacity is improved, but the ability to deform for tool insertion and retention deteriorates
Solution Approach 1:
The patent employs a dynamic deformable retainer ring that can elastically deform during tool insertion and return to its original shape for retention. This dynamic behavior allows the same component to adapt to different operational states (insertion and retention) while maintaining load-bearing capacity through its elastic properties.
Solution Approach 2:
The flexible non-metal material enables the retainer ring to change its shape and dimensions in response to applied loads during tool insertion, then return to its original configuration for retention. This parameter change capability provides both adaptability for insertion and structural integrity for retention.
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 deformable retainer ring enhances the performance and durability of impact tools by minimizing corrosion and failure of metal spring assemblies, ensuring reliable operation in various environments.
Implementation Method 1
A deformable retainer ring made of flexible non-metal material, such as rubber, is used around the anvil to support ball detents, allowing for deformation to accommodate tool insertion and retention
Data Source
AI summary
A tool comprises a housing, an electric motor positioned in the housing, and a drive assembly including an output shaft having a driving end portion. The output shaft extends from the housing such that a tool element for performing work on a workpiece is attachable to the output shaft. A retainer assembly is positioned about an outer surface of the driving end portion. The retainer assembly has a proximal end adjacent to the housing. A deformable retainer ring includes a flexible non-metal material and is positioned about an outer surface of the output shaft between an outer surface of the driving end portion and an interior surface at the proximal end of the retainer assembly