Tool Spindle Shock-Absorbing Structure for Shaft Misalignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing electrical tools experience vibration and noise due to concentricity deviations between the motor shaft and tool spindle, leading to unstable handling during operation.
Innovation Solution
Incorporating a shock-absorbing element between the driving shaft and tool spindle, along with a shock-absorbing rib and ring to absorb vibrations and noise, enhancing the structural alignment and stability of the tool.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a rigid connection structure is used between the motor shaft and tool spindle, then the transmission efficiency is improved, but the vibration and noise caused by concentricity deviation increase
Solution Approach 1:
The patent introduces a shock-absorbing element as an intermediary component between the motor shaft and tool spindle. This element acts as a mediator that transmits rotational motion while simultaneously absorbing vibrations and noise caused by concentricity deviations, thus resolving the contradiction between maintaining transmission efficiency and reducing harmful vibrations.
Solution Approach 2:
The shock-absorbing element changes the mechanical parameters of the connection system by introducing elasticity and damping characteristics. This transforms the rigid connection into a flexible one that can accommodate concentricity deviations, reducing vibration and noise while maintaining effective power transmission.
2Object-affected harmful factors
If the concentricity between motor shaft and tool spindle is precisely controlled, then the vibration and noise are reduced, but the manufacturing complexity and cost increase
Solution Approach 1:
The shock-absorbing element serves as a compensatory intermediary that tolerates concentricity deviations without requiring high-precision manufacturing. It absorbs the misalignment effects, allowing the use of standard manufacturing tolerances while still achieving low vibration and noise levels.
Solution Approach 2:
The patent applies beforehand cushioning by pre-installing the shock-absorbing element that anticipates and compensates for potential concentricity deviations. This prevents vibration and noise issues before they occur, eliminating the need for extremely precise concentricity control during manufacturing.
3Object-affected harmful factors
If a shock-absorbing element is introduced between the motor shaft and tool spindle, then the vibration and noise are reduced, but the device complexity increases
Solution Approach 1:
The shock-absorbing element is implemented as a flexible component (such as a rubber ring or elastic element) that provides vibration and noise absorption functionality. This flexible element is integrated into the existing connection structure, adding minimal complexity while effectively reducing harmful vibrations and noises.
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 solution effectively reduces vibrations and noise, allowing for stable handling and operation of the electrical tool by mitigating the effects of concentricity deviations between the motor shaft and tool spindle.
Implementation Method 1
The shock-absorbing element sheathes the nut and is attached to an inner wall of the slot. The shock-absorbing element may absorb the vibration and noise caused by the concentric deviation of the driving shaft and the tool spindle
Implementation Method 2
The shock-absorbing element sheathes the nut and is attached to an inner wall of the slot
Implementation Method 3
a shock-absorbing rib may be arranged between the bearing set and the housing, and a shock-absorbing ring may be disposed between the motor and the housing to absorb the vibration between the driving mechanisms
Implementation Method 4
a shock-absorbing rib may be arranged between the bearing set and the housing, and a shock-absorbing ring may be disposed between the motor and the housing
Data Source
AI summary
An electrical tool includes a housing, a motor, a bearing set and a shock-absorbing element. The motor is disposed in the housing and has a driving shaft and a nut. The bearing set is arranged on a side of the motor and includes a bearing seat, a bearing and a tool spindle. The tool spindle has a slot disposed at one end thereof facing the motor, and another end thereof is disposed protrusively from the bearing seat. One end of the driving shaft is combined in the slot through the nut. The shock-absorbing element sheathes the nut and is attached to an inner wall of the slot to reduce the vibration and noise during the operation of the electrical tool.