Door Sill Assembly Height Adjustment Mechanism
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Solution Overview
Problem
Current door sill assemblies with adjustable height require adjustments to be made with the door open, often involving guesswork and multiple attempts, and the removal of old thresholds is cumbersome and time-consuming due to hidden screws.
Innovation Solution
A door sill assembly with a vertically displaceable adjustable upper portion and a threshold design featuring dual engagement points for secure mounting and easy release, allowing adjustments to be made with the door closed and facilitating quick removal of the threshold without visible screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the door sill height is made adjustable to fit different door heights and seal gaps, then the adaptability and sealing performance are improved, but the device complexity increases due to moveable parts and adjustment mechanisms
Solution Approach 1:
The door sill is divided into a lower portion and an adjustable upper portion that can move independently. The upper portion is segmented from the lower portion, allowing height adjustment while keeping the overall structure manageable and not overly complex.
Solution Approach 2:
The upper portion is made dynamically adjustable relative to the lower portion through a lift mechanism. This dynamic capability allows the door sill to adapt to different door heights and seal gaps effectively, improving versatility without requiring complete redesign of the entire structure.
2Ease of operation
If the adjustment mechanism is made accessible when the door is closed for convenience, then the ease of operation is improved, but the device complexity increases due to the need for accessible adjustment components
Solution Approach 1:
An actuator serves as an intermediary component between the user and the lift mechanism. The actuator translates rotational input into linear motion of the lift, enabling easy adjustment when the door is closed while maintaining a manageable mechanical complexity through this intermediate element.
Solution Approach 2:
The adjustment mechanism uses a screw thread system to convert rotational motion of the actuator into linear motion of the lift. This mechanical substitution provides a simple, reliable way to achieve height adjustment without complex electronic or hydraulic systems, improving ease of operation while controlling complexity.
3Strength
If the threshold is securely mounted with hidden screws for durability and aesthetics, then the strength and appearance are improved, but the ease of repair worsens due to difficult removal procedures
Solution Approach 1:
The threshold is divided into separate engagement parts (front and rear) that can be released independently. This segmentation allows the threshold to be securely mounted during use but easily removed for repair by simply disengaging the parts in sequence, improving both mounting security and ease of repair.
Solution Approach 2:
The threshold mounting system is made dynamically reversible through the engagement and disengagement mechanism. The threshold transitions from a securely fixed state during normal use to an easily removable state during repair, allowing the system to adapt to different operational requirements without compromising strength or aesthetics.
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
Enables precise adjustment of the door sill height without requiring exact gap measurements and simplifies the process of removing and reinstalling thresholds, improving usability and efficiency.
Implementation Method 1
the actuator is in threaded engagement with the lift. More advantageously, the actuator has an exposed part for manipulation by a user to bring about a desired degree of angular movement of the connector and in turn a desired degree of the linear movement of the lift
Implementation Method 2
the lift and the adjustable upper portion are in engagement along a pair of slanted surfaces such that relative movement between the lift and the adjustable upper portion along the slanted surface and in the first and second directions bring about vertical displacement of the adjustable upper portion
Implementation Method 3
the lower portion includes at least one indentation on its bottom side for application of silicone
Data Source
AI summary
A door sill assembly for a door comprises a sill, having a lower portion and an adjustable upper portion positioned on the lower portion. The adjustable upper portion is vertically displaceable relative to the lower portion by movement of an adjuster that is available for manipulation when said door is closed. The door sill assembly may include a threshold. The threshold has a body. The body includes front and rear engagement parts integrally formed thereon to bring about first and second engagements respectively. The release of the second engagement is dependent on that of the first engagement.