Power Tool Vibration-Proof Handle With Spherical Sliding Fit
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Solution Overview
Problem
Existing power tools with vibration-proof handles face issues such as complex assembly processes, increased tool length, excessive deformation of elastic members, dust invasion, and wear between handle and tool components, leading to reduced operability and longevity.
Innovation Solution
A power tool design featuring a semispherical handle holder and arm portion with a stopper and circumferentially arranged elastic members to distribute load, prevent deformation, and seal dust entry, while maintaining a compact size and improving assembly simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an elastic member is clamped between the power tool body and the handle to absorb vibrations, then vibration-proof performance is improved, but the elastic member undergoes excessive deformation and deteriorates due to aging
Solution Approach 1:
The handle holder portion is given a semispherical outer surface and the arm portion has a semispherical inner surface, creating a spherical sliding fit. This curvature design allows the handle to slide smoothly in multiple directions, distributing the vibration absorption function across both the spherical sliding interface and the elastic member, thereby reducing excessive deformation of the elastic member while maintaining vibration-proof performance
Solution Approach 2:
The invention introduces a dynamic sliding mechanism where the handle arm can move relative to the handle holder within the spherical fit. This dynamic adjustment capability allows the system to adapt to vibration directions, reducing the static load on the elastic member and preventing permanent deformation while maintaining reliable vibration isolation
2Ease of operation
If the arm portion slides on the handle holder portion without protection, then ease of operation is improved, but dust enters the sliding portion causing wear
Solution Approach 1:
A dust-proof seal member (flexible element) is introduced into the sliding portion between the handle arm and handle holder. This flexible seal prevents dust such as iron powder from entering the sliding interface while allowing the handle to move freely, thereby preventing wear and maintaining both ease of operation and reliability over time
3Reliability
If a vibration-proof mechanism is added to the connecting portion, then vibration-proof performance is improved, but the assembling process becomes complicated
Solution Approach 1:
The invention combines multiple functions into integrated components: the semispherical sliding fit structure serves both as the mechanical connection and the vibration isolation mechanism, while the dust-proof seal member simultaneously provides sealing and structural support. This merging eliminates the need for separate vibration-proof mechanisms, simplifying the assembling process while maintaining vibration-proof performance
4Reliability
If the power tool body and handle are connected with a vibration-proof mechanism, then vibration-proof performance is improved, but the length of the tool in the center axis direction is enlarged
Solution Approach 1:
The handle arm is designed to fit within the handle holder portion, with the spherical sliding interface nested within the housing structure. The dust-proof seal member is also nested within the sliding interface. This nested arrangement provides vibration-proof functionality without extending the overall length of the tool in the center axis direction
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 solution effectively reduces deformation and wear of elastic members, prevents dust invasion, and enhances the power tool's operability and longevity by distributing loads and sealing dust entry, resulting in a more reliable and efficient vibration-proof handle.
Implementation Method 1
In order to reduce the vibrations that occur during operation, which might otherwise be transmitted from the power tool body to the handle
Implementation Method 2
it is also conventional to clamp an elastic member in the connecting portion between the power tool body and the handle, so that the vibrations from the tool body may be absorbed by the elastic member
Implementation Method 3
The outer surface of the handle holder portion is slidably fitted in the inner surface of the arm portion
Data Source
Figure 1~2
Figure 3~4
AI summary
A power tool has a handle holder portion (22) having a semispherically bulging outer circumference, and an arm portion (31) enclosing the handle holder portion (22) and having a semispherically recessed inner circumference. The bulging outer circumference of the handle holder portion (22) is fitted in the recessed inner circumference of the arm portion (31). An elastic member (1) is clamped between a power tool body (10) and a handle (30) around the handle holder portion (22) in the radial direction perpendicular to the center axis of the protruding direction of the handle holder portion (22). A bulging portion for limiting the sliding range of the arm portion (31) is disposed at the leading end of the handle holder portion (22).