Washing Machine Drive Coupling for Spin and Agitation Without Clutches
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Solution Overview
Problem
Current washing machine drive systems are complex, costly, and unreliable due to the use of mechanical components like clutches and solenoids to achieve spin and oscillatory dynamics for the wash basket and agitation device.
Innovation Solution
A drive system with a planetary gear train and engagement features radially offset from a shaft, allowing contact with stops on different planes, enabling efficient rotation and oscillation without the need for clutches or solenoids, facilitating both agitation and spin modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mechanical movement with clutches and solenoids is used to convert rotary motion to oscillatory output, then the drive system can achieve spin and oscillatory dynamics, but the device complexity increases and reliability decreases
Solution Approach 1:
The patent extracts and eliminates the complex mechanical movement, clutches, and solenoids from the drive system. Instead of using these separate components to convert rotary motion to oscillatory output, the invention uses a simplified direct-drive mechanism where the motor shaft directly drives both the wash basket and agitation device, achieving both spin and oscillatory dynamics without the intermediary complex mechanical movement.
Solution Approach 2:
The patent makes the motor shaft serve multiple functions simultaneously - it directly drives the wash basket for spin cycles and also drives the agitation device for oscillatory motion. This multi-functional approach eliminates the need for separate clutches and solenoids that would otherwise be required to control different operating modes, thereby reducing device complexity while maintaining adaptability.
2Adaptability or versatility
If clutches and solenoids are used to control agitation device motion, then spin and oscillatory dynamics are achieved, but cost increases
Solution Approach 1:
The patent removes the expensive clutch and solenoid components from the drive system. By using a direct-drive configuration where the motor shaft directly couples to both the wash basket and agitation device, the invention eliminates the need for these costly mechanical movement components, thereby reducing manufacturing cost while maintaining the ability to achieve both spin and oscillatory dynamics.
Solution Approach 2:
The motor shaft itself performs the function of controlling both spin and oscillatory motion without requiring external clutches or solenoids. The direct-drive mechanism allows the motor to self-regulate the motion of both components through its own rotational characteristics, eliminating the need for additional control components and reducing overall system cost.
3Adaptability or versatility
If complex mechanical movement is used to drive both wash basket and agitation device, then both components can be driven by a single motor, but reliability decreases
Solution Approach 1:
The patent extracts and removes the unreliable clutch and solenoid components from the drive system. By implementing a direct-drive configuration where the motor shaft directly connects to both the wash basket and agitation device without intermediary mechanical movement, the invention eliminates potential failure points associated with clutches and solenoids, thereby improving reliability while maintaining the ability to drive both components with a single motor.
Solution Approach 2:
The motor shaft serves as a universal driving element that directly couples to both the wash basket and agitation device. This multi-functional direct connection eliminates the need for separate control mechanisms for each component, reducing the number of moving parts and potential failure points, thereby improving overall system reliability while maintaining adaptability.
Data Source
AI summary
An apparatus is configured to facilitate in an appliance various operating modes including a spin mode and an agitation mode in a vertical-axis washing machine. The apparatus comprise a drive system with a shaft, on which is secured engagement features, and stops that are fixed with respect to the position of the engagement features. Engagement of the engagement features and the stops couple together elements of the appliance such as an agitation device and a wash basket. In one embodiment, the stops and engagement features are distributed on different contact planes located along the shaft, thereby permitting clockwise and counter-clockwise rotation of the shaft and the engagement features through an angle of at least about 180° and up to about 680°.