French Door Oven Linkage With Differential Door Speed
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Solution Overview
Problem
French door oven appliances experience collisions or rubbing between doors when opening and closing simultaneously, which can damage the doors and impact performance and user satisfaction.
Innovation Solution
A linkage assembly with a differential angular velocity mechanism, utilizing gears and linkage arms to rotate one door at a different speed than the other, preventing collisions and rubbing during simultaneous opening and closing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a linkage assembly connects the pair of doors to open and close simultaneously, then a user can open or close both doors with one hand, but the doors collide or rub during simultaneous opening and closing
Solution Approach 1:
The patent applies the dynamics principle by making the angular velocity of door rotation variable rather than constant. The linkage assembly is designed to rotate the first door at a first angular velocity and the second door at a second angular velocity that differs from the first. This dynamic adjustment of rotational speed allows both doors to open or close simultaneously while preventing collision and rubbing between them during the motion process.
2Device complexity
If both doors rotate at the same angular velocity, then the linkage assembly is simple, but the doors impact each other during opening and closing
Solution Approach 1:
The patent applies the parameter changes principle by modifying the angular velocity parameter of door rotation. Instead of maintaining equal angular velocities for both doors, the linkage assembly is designed to rotate the first door at a first angular velocity and the second door at a second angular velocity. This parameter change prevents door impact while maintaining reasonable linkage assembly complexity through the use of differential gear mechanisms.
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 differential angular velocity mechanism effectively reduces door collisions and rubbing, enhancing the longevity of the oven appliance and user satisfaction by maintaining performance.
Implementation Method 1
The linkage assembly includes a pair of gears. Each gear of the pair of gears has an axis of rotation about which the gear is rotatable. The plurality of teeth of one of the pair of gears engages the plurality of teeth of the other of the pair of gears.
Data Source
AI summary
An oven appliance with a cabinet that defines a chamber for cooking food items is provided. A pair of doors is rotatably mounted to provide selective access to the chamber of the cabinet. The pair of doors is connected with a linkage assembly that simultaneously opens and closes the pair of doors. The linkage includes features for rotating one door of the pair at a first angular velocity and for rotating another of the pair of doors at a second angular velocity. An angular velocity differential between the first angular velocity and the second angular velocity can limit impacting or rubbing between the pair of doors during simultaneous opening and closing of the pair of doors.