Adjustable Hydraulic Jack Jib and Link Rod Lengths
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Solution Overview
Problem
Conventional hydraulic horizontal jacks have limited functionality due to fixed jib and link rod lengths, restricting their application to specific lifting heights and loads, making them unsuitable for a wide range of vehicles.
Innovation Solution
An adjustable hydraulic horizontal jack design featuring a jib unit with a bracket, front and rear arms, a set pin, and pin roll, along with link rods and a connecting plate, allowing for adjustable lengths to accommodate varying vehicle chassis heights and loads by forming fixed joints in different positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the jib and link rod lengths are fixed, then the hydraulic horizontal jack can maintain constant lifting height and bearing capacity, but the function is limited and it can only be applied in a narrow field
Solution Approach 1:
The patent applies the dynamics principle by making the jib and link rod lengths adjustable rather than fixed. The jib length can be adjusted by changing the position of the pin roll on the rear arm, and the link rod length can be adjusted by changing the position of the connecting plate on the front arm. This dynamic adjustability allows the jack to adapt to different lifting heights and loads, expanding its application scope while maintaining a relatively simple structure.
Solution Approach 2:
The patent applies the parameter changes principle by enabling adjustment of the physical dimensions (lengths) of the jib and link rod. By changing these geometric parameters, the jack can achieve different lifting capacities and heights. The set pin mechanism allows for discrete parameter adjustments while maintaining structural integrity, resolving the contradiction between adaptability and complexity.
2Adaptability or versatility
If the jib and link rod lengths are made adjustable, then the lifting height and bearing capacity can be changed, but the structure becomes more complex
Solution Approach 1:
The patent applies the segmentation principle by dividing the jib and link rod into segments with adjustable connection points. The jib is segmented into a front arm and rear arm connected by the pin roll, while the link rod is segmented into a first link rod and second link rod connected by the connecting plate. This segmentation allows independent adjustment of each segment's effective length through simple repositioning operations, adding adjustability without proportionally increasing overall structural complexity.
Solution Approach 2:
The patent applies the universality principle by designing the adjustable mechanisms to serve multiple functions. The pin roll and set pin mechanism not only adjusts the jib length but also maintains the structural integrity and lifting function. Similarly, the connecting plate and link rod pin mechanism adjusts the link rod length while preserving the hydraulic lifting function. This multi-functionality reduces the need for separate adjustment mechanisms, thereby limiting the increase in device complexity.
3Adaptability or versatility
If a hydraulic horizontal jack with high tray is introduced, then the height of the lowest position is increased, but nothing else is improved and the function remains limited
Solution Approach 1:
The patent responds to the limitation of fixed-tray designs by implementing dynamic adjustability in the jib and link rod lengths. This allows the jack to adapt to both high and low chassis heights of different vehicles, not just increase the minimum lifting height. The dynamic adjustment capability enables the jack to maintain optimal lifting performance across a wide range of applications, thereby improving functional capability rather than just expanding the height range.
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 reliable lifting of both light and heavy vehicles with different chassis heights, expanding the jack's application scope without altering the hydraulic parameters.
Implementation Method 1
the hydraulic unit will drive the jib unit to lift upwards
Data Source
AI summary
An adjustable hydraulic horizontal jack including a frame, a hydraulic unit, a jib unit, link rods, and a handle. Here, the structures of the jib and the link rod(s) are improved according to an embodiment. With the improved structures, the jack has rational structures and can act reliably. In addition, under the parameters equivalent to those of conventional hydraulic horizontal jacks, the jack of an embodiment of the present invention can change the height of the lowest position and the load by adjusting the length of the jib and link rods. Therefore, the jack is adapted to jacking up not only a light automobile with a low chassis but also a heavy automobile with a high chassis, thus having a wider scope of application.