Multipanel Sliding Door Rack and Pinion Synchronization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multipanel sliding doors experience noise due to panel interactions and require increasing effort to open and close, especially as the number of panels increases, due to their stepwise movement mechanism.
Innovation Solution
A rack and wheelwork arrangement is implemented, where panels are supported for parallel travel with specific toothed wheel ratios to ensure synchronized movement, reducing noise and effort by making each panel's displacement proportional to its position, allowing smooth extension and retraction without the need for sequential engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If panels are moved in a stepwise manner with sequential engagement, then the door structure is simpler to manufacture, but noise is produced by the knocking of moving panels against stationary panels
Solution Approach 1:
A rack and pinion mechanism is introduced as an intermediary device between the motor and the panels. The rack is attached to the panels and the pinion gear converts rotational motion into linear motion, enabling smooth synchronized movement of multiple panels without direct knocking engagement. This intermediary mechanism eliminates the harmful knocking noise while maintaining manageable system complexity through modular design.
Solution Approach 2:
The traditional direct mechanical coupling where panels engage each other sequentially is replaced with a gear-based mechanical system. The rack and pinion arrangement substitutes the direct panel-to-panel contact with a controlled gear engagement system, transforming the harmful impulsive mechanical interaction into a smooth continuous motion that reduces noise while achieving the desired panel movement.
2Force
If panels are moved in a stepwise manner with sequential engagement, then the door mechanism is simpler, but the pulling or pushing effort increases with the number of panels
Solution Approach 1:
The rack and pinion mechanism serves as a mechanical intermediary that provides motion multiplication. The pinion gear, when rotated by a motor, engages with the rack attached to multiple panels, converting a small rotational force into a larger linear force that moves all panels simultaneously. This intermediary system reduces the operational effort required compared to directly moving multiple heavy panels sequentially.
Solution Approach 2:
The system transitions from one-dimensional sequential panel movement to a multi-dimensional coordinated motion system. The rack and pinion mechanism introduces a rotational dimension (the gear rotation) that couples with the linear dimension of panel movement, creating a synchronized multi-dimensional motion system where a single motor input controls the position of multiple panels simultaneously, reducing the cumulative force required.
3Ease of operation
If panels are moved in a stepwise manner, then the manufacturing is simpler, but the operation requires multiple steps each requiring pulling or pushing effort
Solution Approach 1:
The rack and pinion mechanism acts as a controlling intermediary that synchronizes the movement of multiple panels. The pinion gear, driven by a single motor, simultaneously engages with racks on multiple panels, ensuring they move together in a smooth coordinated fashion. This eliminates the jerky stepwise operation while keeping the mechanism relatively simple through the use of standard gear components.
Solution Approach 2:
The rack and pinion system enables continuous smooth motion of the panels rather than discrete stepwise movements. As the pinion gear rotates continuously, it continuously drives the racks, maintaining a steady flow of motion that eliminates the start-stop nature of sequential engagement. This continuous action provides much smoother operation while the modular rack design keeps the overall system complexity manageable.
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 significantly reduces noise and operational effort by synchronizing the movement of panels, ensuring smooth operation and efficient extension/retraction of the multipanel sliding door, independent of the number of panels.
Implementation Method 1
a rack and wheelwork arrangement is provided for the movement of the door panels
Data Source
AI summary
The multipanel sliding door comprises at least two panels which are supported for travel in substantially parallel planes along runners, and is characterized in that a rack and wheelwork arrangement is provided for the movement of the door panels.