Adjustable Door Lifter with Pivoting Balance Beam
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Solution Overview
Problem
Traditional door lifting devices are not adjustable to different heights and lack the strength to handle heavy doors, making them inadequate for various installation needs.
Innovation Solution
A door lifting device with a base plate, fulcrum, and balance beam that can be adjusted in height, featuring a pivoting mechanism with affixing pins and apertures, allowing the balance beam to pivot and change the door carriage's height, ensuring the door remains upright and stable during lifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional door lifting devices are used, then the structure is simple, but the device cannot be adjusted to different heights and lacks strength for heavy doors
Solution Approach 1:
The balance beam is designed with multiple pin aperture positions that allow dynamic adjustment of the pivot point height. Users can select different pin positions on the fulcrum to adjust the door carriage height, transforming a static structure into an adaptable one that responds to different door installation requirements
Solution Approach 2:
The device is segmented into modular components including the base plate, fulcrum with multiple pin apertures, balance beam with affixing pin, and door carriage. This segmentation allows independent adjustment of the pivot point while maintaining overall structural integrity, enabling height adaptability without excessive complexity
2Strength
If traditional door lifting devices are used, then the structure is simple, but the device is not strong enough to hold heavy doors
Solution Approach 1:
The balance beam acts as a lever with the fulcrum as the pivot point, creating a mechanical advantage that counterbalances the heavy door weight. By positioning the pivot point optimally and using the user's foot weight on the opposite end of the balance beam, the system efficiently counteracts the door's weight, enabling heavy door lifting without requiring an overly complex or bulky structure
3Length of moving object
If the balance beam is secured at higher positions, then the door carriage height is increased, but the pivot point must be shifted
Solution Approach 1:
The affixing pin can be dynamically repositioned between multiple pin apertures on the fulcrum, allowing the pivot point to be shifted to optimal positions as the door carriage height is increased. This dynamic adjustment capability makes the operation straightforward while achieving the desired height
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 the user to lift heavy doors to desired heights, accommodating different threshold levels and providing stability and adjustability for various door installation scenarios, even when used in pairs for heavier or wider doors.
Implementation Method 1
a balance beam having a first end and a second end and pivotally connected to the fulcrum
Implementation Method 2
the balance beam can pivot from a first position to a second position such that the door carriage can be adjusted from a first height to a second height
Implementation Method 3
The affixing pin serves as a pivot point for the balance beam such that the balance beam is pivotally connected on the fulcrum
Implementation Method 4
the door is kept in an upright orientation because of the pivotal connection of the door carriage to the balance beam
Data Source
AI summary
A door lifting device comprises a base plate, a fulcrum extending perpendicularly from the base plate, and a balance beam having a first end and a second end pivotally connected on the fulcrum. The balance beam includes a foot plate attached to the first end of the balance beam, and a door carriage attached to the second end of the balance beam. The balance beam can be adjusted to a selected height relative to the base plate. When the selected height of the balance beam relative to the base is increased, the pivot point is increased relative to the base plate. The balance beam can further, based on the selected height, be pivoted from a first location to a second location such that the door. When the pivot point is shifted away from the door carriage to the second position from the first position on the balance beam, the height of the door carriage relative to the surface is adjusted from the first height to the second height.