Door Opening Clutch with Angle Feedback to Reduce Sealing Force
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Solution Overview
Problem
Existing electrical appliances such as refrigerators and dishwashers have increased sealing performance but require excessive force to open the door, posing difficulties for the elderly, children, and patients, and presenting safety risks.
Innovation Solution
A door opening and closing device with a drive mechanism, door ejection mechanism, and door rotation mechanism, featuring a clutch device with a linkage gear and angle acquisition unit, to facilitate smooth and controlled door opening and closing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an adsorption structure or negative pressure is used to maintain sealing performance, then sealing performance is improved, but the force required to open the door increases
Solution Approach 1:
The door ejection mechanism performs preliminary action by ejecting the door body at a predetermined angle before the user needs to open it fully. This preliminary ejection reduces the adsorption force and negative pressure effects, making the door easier to open subsequently. The system proactively creates the necessary conditions for easy opening rather than relying on the user to overcome the sealing force directly.
2Ease of operation
If a door ejection mechanism is added to reduce opening force, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent combines the door ejection mechanism with the existing hinge structure and drive mechanism. The ejection function is integrated into the door opening process rather than being a completely separate system. The linkage mechanism connects the drive motor, transmission assembly, and door body in a coordinated manner, merging multiple functions into a unified system that reduces overall complexity compared to having separate ejection and opening mechanisms.
Solution Approach 2:
The transmission assembly acts as an intermediary between the drive motor and the door body. It includes intermediate components such as gears and linkages that transfer and transform the motor's rotational motion into the appropriate ejection and opening movements. This intermediary transmission system allows for controlled force application and motion transformation, simplifying the overall control mechanism while achieving the door ejection function.
3Reliability
If a clutch device with linkage gear is used to control door opening, then reliability of operation is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent incorporates an angle sensor that provides feedback on the door body's opening angle and position to the control system. This feedback enables the controller to adjust the clutch engagement timing and duration, ensuring reliable operation even with variations in manufacturing precision. The feedback mechanism allows for real-time compensation and precise control of the door opening process.
Solution Approach 2:
The clutch device uses dynamic engagement and disengagement control rather than fixed mechanical linkages. The clutch can be engaged and disengaged at variable positions and speeds during the door opening process, allowing the system to adapt to manufacturing tolerances and wear. This dynamic control provides flexibility and robustness, reducing the stringency of manufacturing precision requirements compared to rigid mechanical connections.
Data Source
AI summary
The disclosure relates to a field of electrical technology, and particularly discloses an electrical apparatus, a door opening and closing device and a control method of a clutch thereof. The door opening and closing device includes: a drive mechanism, a door ejection mechanism, a door rotation mechanism and an angle acquisition unit. a drive mechanism including a driver, a first transmission assembly, a second transmission assembly connected to the driver and simultaneously separably connected to the first transmission assembly, and a clutch-ejection-push assembly pushing the second transmission assembly to separate from or connect to the first transmission assembly; and a linkage gear connected to the first transmission assembly and simultaneously connected to the door ejection mechanism 00) and the door rotation mechanism. The angle acquisition unit is configured to acquire a rotation angle of the linkage gear.