Drum Washer Suspension Structure for Vibration-Controlled Capacity
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Solution Overview
Problem
The existing drum type washing machines face limitations in increasing washing capacity due to vibration transmission issues and restricted size changes, which hinder the enhancement of tub size and overall capacity.
Innovation Solution
A new drum type washing machine structure where the drum's vibration is buffered and supported directly by a suspension unit, rather than being transmitted to the tub, allowing for improved vibration sensing and increased capacity through flexible and rigid support configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If springs and dampers are provided between the tub and cabinet for damping vibration, then vibration transmission to the cabinet is prevented, but the size change of the tub is limited
Solution Approach 1:
The invention separates the vibration damping function from the tub structure by providing independent springs and dampers between the tub and cabinet. This segmentation allows the tub to be designed for maximum capacity while the vibration control system operates independently, resolving the contradiction between preventing vibration transmission and maximizing tub size.
Solution Approach 2:
The springs and dampers act as intermediary elements between the tub and cabinet, absorbing and damping vibration before it reaches the cabinet. This intermediary approach allows the tub to maintain its structural integrity and size while still providing effective vibration control, eliminating the need to compromise tub dimensions for vibration management.
2Productivity
If the drum diameter is increased to increase washing capacity, then the washing capacity is improved, but the vibration during rotation increases
Solution Approach 1:
The invention provides beforehand cushioning by pre-installing springs and dampers between the tub and cabinet to cushion the vibration that will be generated when the drum rotates with increased diameter. This prior cushioning arrangement allows the drum to be enlarged for greater washing capacity while the vibration is controlled from the outset, preventing harmful vibration transmission to the cabinet.
3Productivity
If the drum diameter is increased to increase washing capacity, then the washing capacity is improved, but the size of the washing machine is increased
Solution Approach 1:
The invention segments the washing machine into independently supported components - the tub is supported separately from the cabinet through springs and dampers. This allows the drum diameter to be increased for greater washing capacity while the overall machine footprint is controlled by the cabinet dimensions, not by the drum size, thus resolving the contradiction between washing capacity and machine size.
4Reliability
If a vibration sensor is mounted to sense drum vibration, then vibration control is enabled, but the device complexity increases
Solution Approach 1:
The vibration sensor acts as an intermediary that bridges the mechanical vibration system and the electronic control system. By mounting the sensor to the tub or cabinet, it detects vibration caused by drum rotation and transmits this information to the control unit, which then adjusts drum rotation accordingly. This intermediary approach enables vibration control functionality while maintaining relatively simple device architecture through the use of standard sensor and control components.
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
This solution effectively reduces vibration transmission, enabling the drum type washing machine to increase its capacity and maintain stable operation by controlling drum rotation based on sensed vibrations, thus preventing heavy vibrations and allowing for a larger tub diameter.
Implementation Method 1
a suspension unit for buffering and supporting the bearing housing
Implementation Method 2
springs and dampers are provided between the tub and the cabinet for buffering and damping the vibration of the tub
Implementation Method 3
a vibration sensor for sensing vibration of a structure supported by the suspension unit
Data Source
AI summary
A washing machine for washing laundry is provided. The washing machine includes a tub to hold washing water, a drum in the tub to hold laundry, a rotational shaft connected to a rear surface of the drum, a tub back, which forms a rear side of the tub and through which the rotational shaft passes, a bearing housing that supports the rotational shaft, and a suspension that buffers and supports the bearing housing. A vibration sensor senses vibration of a structure supported by the suspension, thereby enabling control of rotation of the drum based on the sensed vibration.