Washing Machine Stator Support Structure for Vibration-Safe Fastening
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Solution Overview
Problem
The existing drum type washing machines with direct drive motor (DDM) face issues with the damage of position determination protrusions during assembly and transportation due to the weight and vibration of the stator, leading to inefficient fastening and potential deformation of the fastening portion between the stator and the tub.
Innovation Solution
The proposed solution involves a supporting part with a stator rib and sub-supporting rib on the tub's rear wall to securely fasten the stator, distributing the load and preventing damage, while also simplifying the assembly process by eliminating the need for a tub supporter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the stator is directly fastened to the tub rear wall using position determination protrusions, then the assembly process is simplified, but the position determination protrusions are easily damaged during assembly and transportation due to the weight and vibration of the stator
Solution Approach 1:
The supporting part is formed integrally with the tub rear wall in advance, creating a pre-prepared load-bearing structure that prevents damage to the position determination protrusions during assembly and transportation
Solution Approach 2:
The supporting part acts as an intermediary structure between the tub rear wall and the stator, bearing the weight and vibration loads to protect the position determination protrusions from damage
2Ease of operation
If the stator is fastened to the tub rear wall, then the motor can operate, but the fastening portion may deform due to the weight of the stator and high-speed rotation vibration
Solution Approach 1:
The supporting part is formed integrally with the tub rear wall before assembly, creating a pre-reinforced structure that prevents deformation of the fastening portion under operational loads
Solution Approach 2:
The supporting part provides beforehand structural reinforcement to the tub rear wall, cushioning against the weight and vibration forces during high-speed rotation to prevent fastening portion deformation
3Strength
If a tub supporter is added to prevent damage to the fastening portion, then the structural integrity is improved, but the assembly complexity and production costs increase
Solution Approach 1:
The supporting part is merged with the tub rear wall as an integral structure, eliminating the need for separate tub supporter components and reducing assembly complexity while maintaining structural integrity
Solution Approach 2:
The supporting part serves multiple functions: it reinforces the tub rear wall, prevents fastening portion deformation, and protects position determination protrusions, all as a single integrated structure
Data Source
AI summary
A drum type washing machine is provided which includes a tub having a fastening part formed on a rear wall thereof, a stator fastened to the fastening part of the tub, the stator having a core part having teeth formed thereon, a coil wound around the teeth, a first insulator that covers a front surface of the core part and a second insulator that covers a rear surface of the core part, a stator rib formed on a front surface of the first insulator, and a supporting part that projects from the rear wall of the tub that supports the stator rib in an up-and-down direction when the stator is fastened to the fastening part of the tub.