Washing Machine Power Transmission for Motor-Free Mode Switching
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Solution Overview
Problem
Conventional washing machine power transmission devices either increase water consumption due to reliance on buoyancy or elevate production costs with complex mechanical structures, while also wasting space and resources.
Innovation Solution
A power transmission device with a washing shaft and dehydrating shaft, featuring guide grooves and a power transmission member that controls intermittent power transmission based on the relative rotation positions, eliminating the need for a dedicated electric device and simplifying the mechanical structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated clutch motor is used to control power transmission, then reliability of power transmission control is improved, but production cost is increased due to complicated mechanical structure
Solution Approach 1:
The invention extracts and removes the dedicated clutch motor from the system, replacing it with a simplified power transmission device that uses the existing driving motor's rotational force. The power transmission member selectively engages with the washing shaft and dehydrating shaft through guide grooves, eliminating the need for separate control motor while maintaining reliable power transmission control.
Solution Approach 2:
The driving motor serves multiple functions: it directly drives the washing shaft during washing cycles and, through the power transmission member engaging with guide grooves, drives the dehydrating shaft during dehydration cycles. This multi-functionality eliminates the need for a dedicated clutch motor, reducing device complexity while maintaining reliability.
2Device complexity
If buoyancy of wash water is used to control power transmission, then structure is simplified, but water consumption is greatly increased due to increased dehydrating tub volume
Solution Approach 1:
The invention replaces the buoyancy-based mechanical system with a direct mechanical engagement system. The power transmission member engages with the washing shaft and dehydrating shaft through guide grooves, using rotational force transmission instead of water buoyancy. This substitution maintains structural simplicity while eliminating the need for increased water volume.
3Ease of operation
If space is secured between water tub and dehydrating tub for vertical movements, then operation is enabled, but water consumption is increased
Solution Approach 1:
The invention implements dynamic space utilization where the power transmission member moves along guide grooves that are formed directly on the washing shaft and dehydrating shaft. This allows vertical movement capability while minimizing the space required between tubs, as the guide grooves provide the necessary movement path without requiring additional clearance space.
Data Source
AI summary
A washing machine includes a dehydrating tub which is rotatably mounted, a pulsator which is rotatably mounted in the dehydrating tub, a motor which rotates the dehydrating tub and the pulsator, a washing shaft which transmits a rotational force of the motor to the pulsator, a dehydrating shaft which intermittently transmits the rotational force of the washing shaft to the dehydrating shaft, and a power transmission device which is moved according to rotation of the washing shaft.