Trailer Jack Top Clamp Pivoting Crank Clearance
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Solution Overview
Problem
Conventional trailer jacks are bulky due to the central location of the clamp, limiting their ability to be folded and stored, and the crank is often obstructed by objects when rotated, restricting their use with various trailer handles.
Innovation Solution
A jack design featuring a positioning member at the top with a pivotal device allowing it to be angled and a driving rod positioned below, enabling the jack to occupy less space and be rotated freely without obstruction, with a U-shaped member and insertion rods for flexible positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clamp is located at the middle of the outer tube, then the jack can clamp the handle, but the jack occupies too much space and becomes bulky
Solution Approach 1:
The clamp is repositioned from the middle of the outer tube to the top end, utilizing the vertical dimension more effectively. This dimensional relocation allows the clamp to maintain its clamping function while reducing the horizontal footprint of the jack, making it more compact for storage and transport.
Solution Approach 2:
Instead of having the clamp at the middle and the operating mechanism at the top, the invention inverts this arrangement by placing the clamp at the top end and the crank at the bottom end. This inversion optimizes the spatial distribution of components, reducing overall bulk while maintaining functionality.
2Stability of the object's composition
If the clamp is located at the middle of the outer tube, then the jack structure is stable, but the jack can only be rotated 90 degrees and cannot be folded completely
Solution Approach 1:
The jack is designed with dynamic rotation capability around the clamp, allowing it to rotate beyond the fixed 90-degree limitation to any desired angle. This dynamic positioning system maintains structural stability during rotation while providing adaptability for complete folding and various storage configurations.
Solution Approach 2:
The rotation mechanism operates in a different dimensional plane, allowing multi-angle rotation rather than being constrained to a single 90-degree arc. This enables the jack to achieve complete folding while maintaining stability through its repositioned clamp and articulated connection points.
3Volume of moving object
If the crank is located at the top end, then the lifting mechanism is compact, but the crank may be stopped by objects located beside the handle
Solution Approach 1:
The crank is relocated from the top end to the bottom end of the outer tube, inverting the conventional arrangement. This inversion positions the crank in a location with greater clearance from obstacles, ensuring smooth rotation and operation while maintaining the compactness of the lifting mechanism through optimized component placement.
Solution Approach 2:
The driving rod acts as an intermediary transmission element, transferring the rotational motion from the crank at the bottom to the lifting mechanism. This intermediary allows the crank to be positioned in the clear space at the bottom while still effectively driving the lifting action through the rod connection.
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 jack can be easily stored and used with different trailer handles, as it can be pivoted to any desired angle and the crank can be rotated without obstruction, reducing storage space requirements and improving usability.
Implementation Method 1
The crank 5 is rotated to drive the lifting device to move the outer tube 2
Implementation Method 2
The positioning member 20 is positioned by a pivotal device 30 which pivots and positions the positioning member 20
Data Source
AI summary
A jack includes an outer tube, an inner tube and a lifting device. The outer tube has a positioning member and a driving rod connected thereto. The positioning member is positioned by an object and the driving rod is driven by a crank. The inner tube is located in the outer tube and the lifting device is located on the top of the inner tube so as to lift the outer tube. The positioning member is located on the top of the outer tube and the driving rod is located below the positioning member. The positioning member is positioned by a pivotal device which pivots the positioning member to a desired angle and positions the positioning member.