Power Tool Handle With Lengthwise Resilient Vibration Damping
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Solution Overview
Problem
Handheld power tools generate vibration during operation, which is transferred to the handles and user's hands and arms, causing fatigue and discomfort.
Innovation Solution
A handle for power tools featuring a coupling portion, gripping portion, and a resilient deformable member integrated along the length of the gripping portion to attenuate vibrations, utilizing an elastomer material and a spring mechanism to dampen vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a rigid handle structure is used, then structural strength and stability are improved, but vibration transmission to the user increases
Solution Approach 1:
The patent changes the physical parameters of the handle by incorporating a resilient deformable member (spring) that can elastically deform under vibrational loads. This allows the handle to maintain structural integrity while absorbing vibration energy through controlled deformation, resolving the contradiction between strength and vibration transmission.
Solution Approach 2:
The handle combines rigid structural components with a resilient deformable member (spring) to create a composite vibration-damping structure. This composite design allows the rigid parts to provide structural strength while the spring component absorbs vibrations, simultaneously achieving both strength and vibration reduction.
2Object-affected harmful factors
If vibration damping materials are added to the handle, then vibration attenuation is improved, but device complexity increases
Solution Approach 1:
The patent uses a spring (resilient deformable member) as a flexible element integrated into the handle structure. This spring acts as a vibration-damping component that absorbs vibrational energy through elastic deformation, providing effective vibration attenuation while maintaining relatively simple construction compared to complex multi-component damping systems.
3Object-affected harmful factors
If the handle structure is made more complex to reduce vibration, then vibration damping is improved, but ease of manufacture deteriorates
Solution Approach 1:
The handle is segmented into distinct functional components: a rigid structural portion and a resilient deformable member (spring). This segmentation allows each component to be manufactured separately using appropriate processes, then assembled together. The spring can be manufactured using standard spring-making techniques, and the rigid handle portion can be manufactured separately, simplifying the overall manufacturing process despite the added vibration-damping functionality.
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 handle effectively reduces vibration transmission, mitigating user fatigue and discomfort by maximizing vibration attenuation along the handle's length.
Implementation Method 1
a resilient deformable member provided with and extended along the gripping portion
Implementation Method 2
The resilient deformable member and the gripping portion are integrated along length for simultaneous deformation
Data Source
AI summary
A handle (200) for use with a power tool (100) having a coupling portion (204) and a gripping portion (206), a connector (228) for connecting the gripping portion (206) to the coupling portion (204), and a resilient deformable member (256) provided with and extended along the gripping portion (206). The coupling portion (204) is configured to detachably couple the handle (200) to the power tool (100). The gripping portion (206) is in connection with the coupling portion (204) for gripping by a user. The resilient deformable member (256) and the gripping portion (206) are integrated along length for simultaneous deformation.