Sander Motor Shaft Angle Optimization for Vibration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The use of battery packs in Sanders affects the center of gravity and vibration performance, and occupies space, impacting the operator's hand feel and tool size.
Innovation Solution
A sander design with a housing and baseplate assembly, featuring an output shaft driven by an electric motor with a bendable flexible transmission shaft, where the included angle between the motor and output shaft axes is less than or equal to 60 degrees, and a battery pack coupling portion that optimizes the center of gravity projection, reducing vibration and improving balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a battery pack is used to provide energy for the sander, then the sander can operate wirelessly, but the battery pack weight and mounting position affect the center of gravity and vibration performance
Solution Approach 1:
The patent extracts the battery pack from the main housing structure and positions it in a separate mounting location optimized for balance. The battery pack coupling portion is designed as a distinct module that can be mounted at different positions to adjust the center of gravity, separating the energy supply function from the main operational components.
Solution Approach 2:
The patent addresses the center of gravity issue by strategically positioning the battery pack relative to other components. The battery pack mounting position is designed to create a balanced center of gravity that reduces vibration during operation, effectively using the battery pack's weight as a counterbalance to other heavy components like the motor and baseplate.
2Adaptability or versatility
If a battery pack is mounted on the sander, then the sander can function without power cord, but the battery pack occupies space and affects the overall size of the sander
Solution Approach 1:
The battery pack is designed to nest within or alongside other housing components. The battery pack coupling portion integrates with the existing housing structure, allowing the battery pack to occupy space that would otherwise be unused or to share space with other components, thereby minimizing the overall increase in sander size.
3Volume of moving object
If the electric motor shaft and output shaft are aligned at a small included angle, then the transmission path is compact, but the energy transmission efficiency must be maintained
Solution Approach 1:
The patent optimizes the included angle between the motor shaft and output shaft as a critical parameter. By carefully selecting and adjusting this angle (keeping it less than or equal to 60 degrees), the design achieves a balance between compact transmission assembly size and acceptable energy transmission efficiency, reducing the need for complex alignment mechanisms.
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 enhances the balance and reduces vibration, providing a better hand feel and maintaining a compact size while ensuring efficient energy transmission and sanding performance.
Implementation Method 1
at least part of the transmission shaft is a bendable flexible portion
Implementation Method 2
an electric motor drives the output shaft to rotate
Implementation Method 3
The output shaft is supported by a first bearing and a second bearing
Data Source
AI summary
A sander includes a housing, a baseplate assembly, an output shaft rotating about a first axis, an electric motor, and an electric motor shaft extending along a second axis. A first included angle formed between the first axis and the second axis is less than or equal to 60 degrees.