Drum Washer Drive With Clutch-Switched Dual-Speed Rotation
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Solution Overview
Problem
The existing drum washing machines with a driving part using transmission belts and pulleys face challenges in achieving high reliability and low cost, as they require two motors and have limitations in rotating speed control, which affects detergency and operational efficiency.
Innovation Solution
A drum washing machine design that incorporates a driving part with a single motor, utilizing a clutch mechanism and pulleys to switch between different rotating speeds, allowing the drum and rotating body to rotate at varying speeds, and includes a bearing system to reduce the size and cost of the driving part, enabling efficient washing and spinning operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If two driving motors are used to enable the drum and rotating body to rotate at different speeds, then the rotating speed control is achieved, but the cost increases and device complexity increases
Solution Approach 1:
The transmission system is segmented into two independent paths: one path transmits power from the motor to the drum through a first pulley and first transmission belt, while the other path transmits power to the rotating body through a second pulley and second transmission belt. This segmentation allows different rotating speeds for the drum and rotating body while using a single motor, resolving the contradiction between speed control and device complexity.
2Reliability
If transmission belts and pulleys are used for speed control, then the reliability is improved, but the device complexity increases due to additional components
Solution Approach 1:
The single driving motor serves multiple functions by powering both the drum and rotating body through separate transmission paths. The motor acts as a universal power source that can independently control the rotation of different components, achieving both reliability through reduced motor count and functional versatility through multi-path transmission.
3Productivity
If the drum and rotating body rotate at the same speed during spinning, then the washing performance is improved, but the device cannot achieve differential rotation during washing and rinsing
Solution Approach 1:
The transmission system is designed to be dynamically adjustable, allowing the drum and rotating body to rotate at the same speed during spinning operations for optimal washing performance, while enabling differential rotation during washing and rinsing phases. The independent transmission paths provide the flexibility to adapt rotation speeds to different operational requirements.
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 provides a reliable and cost-effective drum washing machine with improved detergency and washing capacity, as it allows for efficient washing and spinning operations by optimizing the rotating speeds and reducing mechanical stress on the washings, while also simplifying the assembly and reducing the overall size of the driving part.
Implementation Method 1
a first pulley, which is fixed on the first rotating shaft and is connected with the driving motor via a first transmission belt
Implementation Method 2
a second pulley, which is connected with the driving motor via a second transmission belt
Data Source
AI summary
A drum washing machine capable of driving a drum and a rotating body to rotate by a driving part, is provided. The driving part includes: a driving motor; a first rotating shaft fixed to the drum; a second rotating shaft fixed to the rotating body; a first pulley, which is fixed on the first rotating shaft and connected with the driving motor via a first transmission belt; a second pulley, which is connected with the driving motor via a second transmission belt and has an outer diameter different from that of the first pulley; and a clutch mechanism part, configured to switch a driving form of the driving part between a biaxial driving form and a drum independent driving form.