Impact Tool Dynamic Vibration Reducer Assembly
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Solution Overview
Problem
Existing impact tools face challenges in ease of assembly and repair of vibration reducing mechanisms and electrical components, particularly in reducing vibration and improving power supply mounting efficiency.
Innovation Solution
The impact tool design integrates the dynamic vibration reducer and driving mechanism as pre-assembled parts, allowing for easier mounting and dismounting, and incorporates a covering member to retain internal mechanisms and electrical components, enhancing assembly and repair processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the dynamic vibration reducer components (weight and coil spring) are individually mounted to the cylinder or barrel part, then the vibration reducing function is achieved, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The patent combines the weight and coil spring into a single integrated assembly unit that is pre-assembled together. This assembly is then mounted as one component to the cylinder or barrel part, reducing the number of separate mounting operations. The merging of components simplifies the assembly process while maintaining the vibration reduction functionality.
Solution Approach 2:
The weight and coil spring are pre-assembled into a ready-to-install unit before being mounted to the main structure. This preliminary assembly allows for easier handling and installation as a single component, reducing the complexity of the overall assembly process while ensuring proper configuration of the vibration reducing mechanism.
2Device complexity
If the motor cover is designed only as a simple cover for the brush holder, then the structure remains simple, but the ease of repair and replacement of carbon brushes is limited
Solution Approach 1:
The motor cover is designed to serve multiple functions: it acts as a protective cover for the brush holder while also providing easy access for carbon brush replacement. The cover incorporates features such as removable sections or access ports that enable maintenance operations without requiring complete disassembly, thus combining structural simplicity with repairability.
3Adaptability or versatility
If electrical components are mounted separately in the tool body, then the design allows flexibility, but the mounting process becomes more complex and time-consuming
Solution Approach 1:
Electrical components are grouped and mounted together as an integrated assembly unit within the tool body. This approach maintains the flexibility of component arrangement while significantly reducing mounting time, as the entire electrical subsystem can be installed in a single operation rather than individually mounting each component.
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 design reduces vibration transmission to the user's hand, simplifies the assembly and repair of vibration reducing mechanisms, and improves the ease of mounting electrical components, leading to a more efficient and user-friendly impact tool operation.
Implementation Method 1
a dynamic vibration reducer to reduce vibration caused in the axial direction of the hammer bit during hammering operation
Implementation Method 2
The dynamic vibration reducer has a weight that can linearly move under a biasing force of a coil spring
Implementation Method 3
a motor which linearly drives a hammer bit in the axial direction of the hammer bit
Implementation Method 4
an elastic element that applies a biasing force to the weight in the axial direction of the tool bit
Data Source
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AI summary
It is an object of the invention to provide a technique that contributes to further improvement of an impact tool (101). A representative impact tool includes a motor (111), a tool body (103) that houses the motor (111), a dynamic vibration reducer (151) and a driving mechanism part that is driven by the motor (111) and forcibly drives the dynamic vibration reducer (151) by applying an external force other than vibration of the tool body (103) to the dynamic vibration reducer (151), during hammering operation. The electrical components including the connecting terminal (140a,140b), the power terminal (144), the power switch (131) and the control unit (147) are integrally mounted to a housing (140c) and thus form an electrical component assembly (140).