Impeller-Rotor Shaft Assembly for Firm Concentric Motor Coupling
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Solution Overview
Problem
The existing motor assemblies in vacuum cleaners face challenges in efficiently combining the impeller and rotor shaft, leading to increased volume and reduced manufacturing efficiency due to interference between components.
Innovation Solution
A motor assembly design that includes a stator, a rotor shaft electromagnetically interacting with the stator, and an impeller with a shaft combiner having a gradient combining plane and anti-deformation units to securely attach the rotor shaft, ensuring a firm and concentric combination of the impeller and rotor shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the impeller and rotor shaft are combined using a simple structure, then the device complexity is reduced, but the combination firmness and concentricity deteriorate
Solution Approach 1:
The shaft combiner is divided into multiple functional segments: a gradient combining plane for adhesive application and initial bonding, and anti-deformation units for structural reinforcement. This segmentation allows each part to perform its specific function optimally while maintaining overall simplicity.
Solution Approach 2:
The gradient combining plane features a curved or inclined surface that gradually increases in diameter, providing optimal surface area for adhesive application and ensuring concentric alignment during the pressing process. This curved geometry naturally guides the rotor shaft into correct positioning.
2Reliability
If the impeller and rotor shaft are combined using a complex structure with multiple components, then the combination firmness and concentricity are improved, but the device complexity increases
Solution Approach 1:
The shaft combiner merges multiple functions into a single integrated component: it provides the gradient combining plane for adhesive bonding and incorporates anti-deformation units for structural support. This consolidation achieves reliable combination firmness while avoiding the complexity of multiple separate parts.
Solution Approach 2:
The shaft combiner serves multiple purposes simultaneously: it acts as an adhesive application surface, a structural reinforcement element, and a concentric alignment guide. This multi-functionality reduces the need for additional components while maintaining combination reliability.
3Productivity
If the impeller and rotor shaft are combined using a simple pressing method, then the manufacturing efficiency is improved, but the combination firmness deteriorates
Solution Approach 1:
The gradient combining plane is pre-formed on the shaft combiner to provide optimal adhesive application surface area and geometry. This preliminary preparation ensures that when pressing occurs, the adhesive is already positioned for maximum bonding effectiveness, eliminating the need for complex pressing procedures.
Solution Approach 2:
An adhesive is introduced as an intermediary substance between the gradient combining plane and the rotor shaft. This adhesive mediator creates a strong chemical bond that supplements the mechanical pressing, achieving combination firmness without requiring complex or time-consuming pressing operations.
4Reliability
If the impeller and rotor shaft are combined using a complex pressing method, then the combination firmness is improved, but the manufacturing efficiency deteriorates
Solution Approach 1:
The complex pressing operations are extracted and replaced by the inherent geometric features of the shaft combiner, specifically the gradient combining plane. This geometric extraction provides the necessary bonding surface area and alignment guidance without requiring complex external pressing equipment or procedures.
Solution Approach 2:
The shaft combiner's gradient combining plane structure serves itself by providing optimal adhesive application geometry and concentric alignment guidance. This self-service feature eliminates the need for complex external pressing methods, achieving combination firmness through the component's own geometric properties while maintaining manufacturing efficiency.
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 lifespan of the motor assembly by firmly combining the impeller and rotor shaft, reducing interference and increasing manufacturing efficiency while maintaining concentric operation.
Implementation Method 1
The outer circumferential face of the rotor shaft and the gradient combining plane are adhered to each other by an adhesive.
Implementation Method 2
a rotor having a rotor shaft and electromagnetically interacting with the stator to be rotated
Data Source
AI summary
A motor assembly of the present disclosure improves a combined structure between an impeller and a rotor to more firmly combine them. Furthermore, the impeller is combined with a rotor shaft without deformation, so the durability of the respective components may be improved.