Cantilever Handle with Pivot Biasing for Power Tool Vibration Reduction
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Solution Overview
Problem
Power tools with hammer mechanisms experience significant vibration transmission to the grip part during operation, which current vibration-isolating structures do not adequately address.
Innovation Solution
A power tool design featuring a handle connected to the tool body in a cantilever manner with a pivotable grip part and biasing members that absorb vibration, allowing the handle to pivot relative to the tool body, thereby reducing vibration transmission to the grip part.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the handle is rigidly connected to the tool body, then structural stability is improved, but vibration transmission to the grip part increases
Solution Approach 1:
The handle is designed to be pivotable relative to the tool body through a pivot axis, transforming the rigid connection into a dynamic connection that allows controlled movement. This pivotability enables the handle to move away from the tool body in response to vibration, reducing vibration transmission to the grip part while maintaining structural stability during operation
Solution Approach 2:
The connection between the handle and tool body is changed from a fixed rigid connection to a pivotable connection with a specific pivot axis. This parameter change in the connection type allows the handle to have both stability during operation and vibration isolation capability, as the pivot axis enables controlled movement to absorb vibration energy
2Object-affected harmful factors
If the handle is made movable to reduce vibration, then vibration isolation is improved, but structural stability deteriorates
Solution Approach 1:
The handle is designed with pivotability relative to the tool body, creating a dynamic connection that can adapt to vibration while maintaining stability during operation. The pivot axis provides a controlled degree of freedom that allows the handle to move away from the tool body in response to vibration, reducing vibration transmission to the grip part
Solution Approach 2:
The connection parameters are changed to include a pivot axis that allows controlled movement. This parameter change enables the handle to have both stability during operation (when properly positioned) and vibration isolation capability (when moving away from the tool body in response to vibration), resolving the contradiction between stability and vibration isolation
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 design effectively reduces vibration transmission to the grip part by allowing the handle to pivot and absorb vibrations, enhancing user comfort and operational stability.
Implementation Method 1
The at least one biasing member is configured to pivotally bias the tool body and the handle such that the grip part and the tool body move away from each other
Implementation Method 2
The at least one biasing member is disposed (interposed) between the tool body and the handle
Implementation Method 3
the handle can pivot relative to the tool body in response to vibration that is generated in driving the tool accessory
Implementation Method 4
the handle can pivot relative to the tool body in response to vibration
Data Source
AI summary
A power tool having a hammer mechanism includes a tool body defining the driving axis, a motor housed in the tool body, an elongate handle connected to the tool body in a cantilever manner and extending in a direction intersecting the driving axis, and at least one biasing member disposed between the tool body and the handle. The motor has a motor shaft that is rotatable around an axis parallel to the driving axis. The handle includes a first end portion connected to the tool body to be pivotable around a pivot axis relative to the tool body, a free end, and a grip part disposed between the first end portion and a free end of the handle. The at least one biasing member is configured to pivotally bias the tool body and the handle such that the grip part and the tool body move away from each other.