Dynamic Vibration Reducer in Power Tool Grip
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Solution Overview
Problem
Existing power tools, such as hammers and hammer drills, face challenges in reducing vibration during operation without increasing their size, and existing vibration reduction methods often compromise tool size or provide inadequate protection against external impacts.
Innovation Solution
Incorporating a dynamic vibration reducer with a weight and elastic element within the tool's housing or handgrip, which reciprocates to reduce longitudinal vibrations, thereby minimizing size increase and enhancing impact protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vibration proof chamber is integrally formed with the housing to house the dynamic vibration reducer, then vibration reduction function is provided, but the power tool increases in size
Solution Approach 1:
The patent merges the dynamic vibration reducer with the existing housing structure by utilizing the grip portion as the mounting location. The grip portion serves dual purposes: as the user's handhold and as the housing for the vibration reducer, eliminating the need for a separate vibration proof chamber and thereby avoiding size increase.
Solution Approach 2:
The grip portion is designed to perform multiple functions: it serves as the user's handhold, provides structural support, and houses the dynamic vibration reducer. This multi-functionality allows the vibration reduction feature to be integrated without requiring additional space that would increase the overall tool size.
2Reliability
If the dynamic vibration reducer is disposed within the housing, then vibration reduction is achieved, but the housing space becomes constrained
Solution Approach 1:
The patent utilizes the longitudinal dimension of the grip portion to house the vibration reducer, rather than consuming transverse space within the main housing. By extending the vibration reducer along the length of the grip, the design preserves the cross-sectional dimensions of the housing while accommodating the vibration reduction mechanism.
3Reliability
If the dynamic vibration reducer is exposed on the outside, then it can perform vibration reduction, but it becomes vulnerable to external impacts
Solution Approach 1:
The vibration reducer is merged with the grip portion, which is already an integral part of the housing structure. This integration provides natural protection against external impacts, as the grip is designed to withstand handling and accidental drops, thereby protecting the vibration reducer without compromising its vibration reduction 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
Effectively reduces vibrations during operation while maintaining the tool's compact size and providing protection against external impacts, ensuring balanced weight distribution and improved user experience.
Implementation Method 1
an elastic element disposed between the weight and the housing and adapted to apply a biasing force to the weight
Implementation Method 2
By the reciprocating movement of the weight, the dynamic vibration reducer reduces vibration which is caused in the housing
Data Source
AI summary
A power tool capable of performing vibration damping action in working operation, without an increase in size. The working tool includes a motor, a housing in which an internal mechanism driven by the motor is stored, a tool bit disposed on one end of the housing, a hand grip continuously connected to the other end of the housing, and a dynamic damper. The dynamic damper is disposed by utilizing a space between the housing and the internal mechanism so that the damping direction of the dynamic damper faces the longitudinal direction of the tool bit.