Vehicle Door Lifting System with 3-Axis Precision
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Solution Overview
Problem
Removing and re-installing vehicle doors is challenging due to their weight, lack of lifting points, and the risk of damage to the doors and vehicle surfaces, as well as the difficulty in safe storage and alignment.
Innovation Solution
A mobile base with a low center of gravity and 3-axis adjustment systems for precise alignment and lifting, combined with rigid coupling and strapping to minimize physical exertion and protect painted surfaces, allows for safe removal, storage, and re-installation of vehicle doors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If doors are removed by hand, then the user can enjoy door-free use of the vehicle, but the heavy weight and lack of lifting points make removal physically difficult and dangerous
Solution Approach 1:
A mobile lifting device with a door engagement mechanism serves as an intermediary between the user and the heavy door. The device includes a base with wheels for mobility, a vertical mast structure, and an engagement mechanism that hooks onto the door's upper edge, allowing the user to lift the door safely without direct hand contact with the heavy weight.
Solution Approach 2:
The lifting device incorporates a counterweight mechanism that balances the door's weight during removal and installation. The counterweight system reduces the effective weight the user must lift, making the operation feasible despite the door's heavy mass.
2Reliability
If doors are stored on a rack or leaned against a wall, then storage is achieved, but the painted lower edge is at risk of scratching, chipping, or damage
Solution Approach 1:
The device incorporates a protective film or flexible barrier between the door's painted lower edge and the storage surface. This thin protective layer prevents direct contact that could cause scratching or chipping, while still allowing the door to be securely supported during storage.
3Manufacturing precision
If doors are removed without proper alignment tools, then removal is simpler, but precise re-installation becomes difficult and time-consuming
Solution Approach 1:
The lifting device incorporates alignment features that are engaged before the door is fully removed. These preliminary alignment actions ensure that when the door is re-installed, it automatically returns to the correct position without requiring time-consuming manual alignment adjustments.
Solution Approach 2:
The device replaces manual alignment procedures with a mechanical alignment system. The lifting mechanism includes guide features and positioning elements that automatically align the door with the vehicle body during removal and re-installation, substituting precise manual operations with a automated mechanical system.
4Adaptability or versatility
If the vehicle is parked on irregular surfaces, then parking flexibility is improved, but door removal becomes unsafe due to device tilting and misalignment
Solution Approach 1:
The device incorporates dynamic adjustment mechanisms that allow the base and mast to adapt to irregular parking surfaces. The system can tilt or adjust its angle to remain plumb and properly aligned with the door, even when parked on uneven ground, maintaining safety and reliability across various surface conditions.
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 system enables safe and precise removal and re-installation of vehicle doors with minimal user effort, reducing the risk of damage to the doors and vehicle surfaces, and provides a stable and protected storage solution.
Implementation Method 1
the door is lifted off of the vehicles receiving hinge mounts using the device's vertical most axis jack screw, via a crank handle, by the user
Implementation Method 2
a mobile base, with a low center of gravity for stability (to reduce the chances of tipping over), for positioning the device near the vehicle and to its storage location
Implementation Method 3
rigid coupling of the door to the lifting device, strapping each door to paint protected rests (felt padded)
Data Source
AI summary
A system for removing, storing and precisely re-installing removable automobile doors. This system includes a mobile base for positioning near the vehicle and moving stored doors to their storage location. The base of this system provides mounting positions for 2 or more lifting/storing/re-installation devices, accommodating full service (removal, storage and re-installation) of up to 4 doors at once. The lifting/storage/re-installation devices contain full 3 axis precise adjustment and rigid coupling to each of the vehicle's doors. Without this precision, the weight and non-balance of removing/re-installing the doors can cause the door to tilt into or away from the vehicle, possibly crushing a human body part (finger, hand) and/or damaging the vehicle or door. By rigidly coupling the door to the precisely adjusted device, precise vertical lifting and lowering may be used to remove and re-install the doors, including accommodating surface variations encountered from removal to re-installation time.