Drum Washer Bearing Housing With Vibration-Attenuating Support
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Solution Overview
Problem
The existing drum type washing machines face issues with amplified vibration noise, misalignment of bearings, and the need for excessive rigidity in the rear wall of the tub, which increases noise and complexity in assembly.
Innovation Solution
A drum type washing machine design featuring a bearing housing with a hub, a supporting portion, and a fastening portion, integrated as one unit, along with a vibration attenuating device and connective supporters to reduce vibration and enhance system stiffness, while minimizing the number of components and assembly time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the bearing housing is fixedly secured to the tub and the damper is placed under the tub, then the structure provides support for the drum, but the vibration of the tub is amplified and noise increases
Solution Approach 1:
A vibration attenuating device is introduced as an intermediary element between the tub and the bearing housing/damper assembly. This mediator absorbs and reduces vibration transmission, preventing the amplification of harmful vibrations while maintaining structural support functionality.
Solution Approach 2:
The bearing housing is divided into a modular structure with separate components including the hub, supporting portion, and fastening portion. This segmentation allows the vibration attenuating device to be integrated into the supporting portion without compromising the overall structural integrity, thereby reducing noise while maintaining support strength.
2Ease of manufacture
If the bearing housing is divided into multiple separate components, then assembly flexibility is improved, but the number of components increases and assembly time increases
Solution Approach 1:
The hub, supporting portion, and fastening portion are integrated into a single bearing housing component. This merging reduces the total number of parts while maintaining the functional benefits of modular design, as each portion serves its specific function within the unified structure, thereby simplifying assembly without sacrificing manufacturing flexibility.
3Ease of manufacture
If the bearings are placed away from the center of the hub, then manufacturing is simplified, but misalignment occurs and drum driving shaft placement becomes difficult
Solution Approach 1:
The supporting portion is specifically designed with localized features that ensure precise bearing alignment. By concentrating the alignment functionality in this specific region of the bearing housing, the design achieves both ease of manufacture and high precision bearing placement, eliminating misalignment issues while maintaining manufacturing simplicity.
4Stability of the object's composition
If the rear wall of the tub is designed with excessive rigidity to support the bearing housing, then structural stability is improved, but the overall system weight increases
Solution Approach 1:
The bearing housing design incorporates dynamic vibration attenuation capabilities through the supporting portion and vibration attenuating device. This dynamic approach allows the structure to adapt to vibrational forces, maintaining stability without requiring excessive static rigidity in the rear wall, thereby reducing the overall weight while preserving structural stability.
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 vibration noise, improves system stiffness, and simplifies assembly by distributing force uniformly through the connective supporters, resulting in a lighter and more rigid system.
Implementation Method 1
A vibration attenuating device (60) for attenuating vibration transmitted from the drum to the cabinet
Data Source
Figure 1~2
Figure 3~4
AI summary
This invention relates to a drum type washing machine including a cabinet (70), a tub provided in the cabinet (70), a drum (10) rotatably provided in the tub, a bearing housing (300) including a hub (311 ) having a rotating shaft (40) of the drum 8109 passed therethrough and bearings placed in a center portion (311 a) thereof, a supporting portion (312) which extends from an outside circumference of the hub (311 ) integrally, and a fastening portion (313) provided integrally with the supporting portion (312), a connective supporter (400.) fastened to the fastening portion (313) for supporting the bearing housing (300), and a vibration attenuating device (60) between the connective supporter (400) and the cabinet (70) for attenuating vibration.