motor
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Solution Overview
Problem
Conventional motors for vacuum cleaners face issues with increased flow path resistance, reduced efficiency, and higher material costs due to the placement of components between the impeller and stator, which affects suction force and spatial efficiency.
Innovation Solution
A motor design featuring a rotor, stator assembly, and housings arranged to minimize overlap and maximize airflow, with leg portions and coupling structures that enhance flow path performance and reduce axial length, allowing for visual inspection and cost savings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If components are placed between the impeller and stator to couple the housings, then the structural stability is improved, but the flow path resistance is increased and efficiency is reduced
Solution Approach 1:
The patent removes the intermediate components (support ribs and reinforcing ribs) that were previously placed between the impeller and stator. By extracting these obstructing elements, the flow path resistance is reduced while the housing structure maintains its stability through alternative coupling methods at the ends of the housings.
2Strength
If the motor components are arranged with housings enclosing them, then the structural protection is improved, but the axial length is increased and spatial efficiency is reduced
Solution Approach 1:
The patent merges the first housing and second housing by directly coupling their end surfaces together, eliminating the need for separate intermediate support structures. This integration reduces the overall axial length while maintaining structural protection through the reinforced end coupling that provides both mechanical strength and housing support.
3Strength
If solid housing structures are used to enclose components, then the structural strength is improved, but the material cost is increased
Solution Approach 1:
The patent segments the housing structure into two separate housings (first housing for stator, second housing for impeller) that are coupled at their ends. This segmentation allows each housing to be optimized independently, using material only where structurally necessary, thereby reducing overall material consumption while maintaining the required structural strength for enclosing and protecting the motor components.
4Strength
If components are enclosed in housings, then the protection is improved, but the visual inspection capability is reduced
Solution Approach 1:
The patent divides the enclosure into two separate housings that can be independently accessed. This segmentation allows maintenance personnel to open either the first housing or second housing for visual inspection and maintenance of specific components (stator or impeller respectively), providing protection when closed while enabling easy visual inspection when opened, without requiring complete disassembly.
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 flow path performance, reduces material costs, and improves spatial efficiency while maintaining effective suction force, facilitating easier maintenance and visual inspection.
Implementation Method 1
The rotor can be rotated by an electromagnetic interaction with the stator
Implementation Method 2
an impeller coupled to an axial lower region of the rotational shaft
Data Source
Figure 1
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AI summary
Provided is a motor. According to one aspect of the present disclosure, a motor includes: a first housing; a rotor coupled to the rotational shaft; a stator assembly coupled to the first housing and placed radially outward of the rotor; an impeller coupled to an axial lower region of the rotational shaft; and a second housing coupled to the first housing and enclosing the impeller, and the first housing may include a bearing housing to which the rotational shaft is rotatably coupled, and a plurality of first leg portions that extend from a radial outer side to an axial lower portion of the bearing housing and are spaced apart from each other in a circumferential direction, the second housing may include an impeller cover covering the impeller, and a plurality of second leg portions that extend from an outer surface of the impeller cover to an axial upper portion and are coupled to the plurality of first leg portions, and an upper end of the impeller cover may be placed at an axial lower portion of the stator assembly and the plurality of second leg portions may be placed at a radial outer side of the stator assembly.