Impact Tool Dynamic Vibration Reducer
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Solution Overview
Problem
Existing impact tools face challenges in effectively reducing vibration and reaction force during hammering operations, leading to inefficiencies and potential damage.
Innovation Solution
The integration of a dynamic vibration reducer with a weight and elastic element that moves axially to absorb reaction forces and reduce vibration, utilizing the elastic element to position the tool body and absorb rebound forces, thereby simplifying the structure and reducing the number of parts needed for vibration reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a dynamic vibration reducer with weight and elastic element is integrated into the impact tool, then vibration reduction function is enhanced, but device complexity increases
Solution Approach 1:
The patent combines the vibration reduction function with the existing hammering mechanism by integrating the weight and elastic element into the hammer actuating member structure. The weight is positioned within the cylinder housing, and the elastic element is incorporated into the existing mechanical linkage, merging vibration reduction components with the driving mechanism to reduce overall device complexity while maintaining effective vibration cancellation.
Solution Approach 2:
The elastic element serves multiple functions: it provides the restoring force for the weight in the dynamic vibration reducer, positions the tool body with respect to the workpiece, and absorbs reaction forces from hammering operations. This multi-functionality reduces the need for separate components, thereby enhancing vibration reduction while limiting increases in device complexity.
2Device complexity
If the elastic element is used for both positioning and reaction force absorption, then the number of parts is reduced, but the elastic element's performance requirements increase
Solution Approach 1:
The elastic element is designed to simultaneously perform positioning of the tool body and absorption of reaction forces during hammering. By selecting appropriate material properties and geometric dimensions, the single elastic element can satisfy both functional requirements without compromising reliability, thereby reducing the total number of parts while maintaining system performance.
Solution Approach 2:
The patent optimizes the elastic element's parameters (material modulus, cross-sectional area, length, pre-load) to ensure it can handle both positioning and reaction force absorption duties. By carefully adjusting these parameters, the elastic element achieves the necessary stiffness and strength to reliably perform multiple functions without requiring additional components.
3Volume of moving object
If the weight and elastic element are annularly arranged outside the cylinder, then space utilization is improved, but the positioning precision may be affected
Solution Approach 1:
The weight and elastic element are arranged in an annular configuration outside the cylinder, utilizing the radial space rather than axial or lateral dimensions. This dimensional arrangement optimizes space utilization within the tool housing while maintaining the necessary positioning precision through careful design of the annular structure's geometry and its connection points to the hammer actuating member.
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
This solution effectively reduces vibration and reaction force transmission, enhancing the vibration reduction function without the need for additional power input, resulting in a more efficient and simplified mechanism for impact tools.
Implementation Method 1
the elastic element of the dynamic vibration reducer elastically deforms by the reaction force that the hammer actuating member receives from the workpiece, and thereby absorbs this reaction force
Implementation Method 2
The dynamic vibration reducer includes a weight that can linearly move under a biasing force of an elastic element to reduce vibration during hammering operation by the movement of the weight in the axial direction of the hammer actuating member
Data Source
AI summary
It is an object of the invention to provide a technique that contributes to rationalization of a mechanism relating to reduction of vibration in an impact tool. Representative impact tool includes a tool body, a hammer actuating member, a dynamic vibration reducer and a positioning elastic element. The positioning elastic element contacts the hammer actuating member and thereby positions the tool body with respect to the workpiece so as to absorb a reaction force caused by rebound from the workpiece and acts on the hammer actuating member when the hammer actuating member performs the hammering operation on the workpiece. The positioning elastic element includes the elastic element formed as a component part of the dynamic vibration reducer.