Dual Screw Jack System for Heavy-Duty Lifting
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Solution Overview
Problem
Existing jack systems for heavy-duty lifting face limitations such as the need for separate jack stands for safety, restricted ability to lift at varying heights, lack of modularity, and inability to operate with different energy sources, making them unsafe and inefficient, especially in close-to-obstruction scenarios and for simultaneous lifting at multiple points.
Innovation Solution
A jack apparatus comprising a pair of screw jacks, a yoke, a shaft coupler, and a power unit, with a housing and base design that allows for adjustable lifting heights, modular components, and the ability to use different power sources, along with a control system for simultaneous operation of multiple jacks, ensuring safe and efficient lifting without separate jack stands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate jack stands are used to ensure safety, then safety is improved, but device complexity increases
Solution Approach 1:
The patent combines the jack mechanism and jack stand into a single integrated apparatus. The jack mechanism includes a base, screw jacks, yoke, and housing that work together as one unified system, eliminating the need for separate jack stands while maintaining safety through the self-contained design.
Solution Approach 2:
The integrated jack mechanism serves multiple functions: it provides lifting capability through the screw jacks and simultaneously acts as a stable support structure through the base and housing, replacing the need for separate jack stands. The system performs both lifting and support functions within a single apparatus.
2Force
If jack systems are designed for high lifting capacity, then lifting capability is improved, but adaptability to different lifting heights deteriorates
Solution Approach 1:
The patent employs adjustable components including a removable yoke and adjustable positioning mechanisms that allow the jack system to adapt to different lifting heights while maintaining high lifting capacity. The screw jacks can be adjusted to accommodate various stroke lengths and positioning requirements.
Solution Approach 2:
The jack system is divided into modular components including a base, removable yoke, and housing that can be independently adjusted or reconfigured. This segmentation allows the system to be adapted to different lifting applications while maintaining the high lifting capacity of the screw jack mechanism.
3Ease of repair
If jack systems are made modular for easy assembly, then ease of repair is improved, but structural stability deteriorates
Solution Approach 1:
The jack system is designed with modular components including a base, removable yoke, and housing that can be easily assembled and disassembled. These segmented components maintain structural stability through precise mechanical connections and interlocking designs that ensure stability during operation while allowing for easy maintenance.
4Ease of operation
If jack systems are designed for close-to-obstruction lifting, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The jack system features an asymmetric base configuration with offset screw jack arrangements that enable close-to-obstruction lifting. The non-symmetric positioning of components allows the jack to operate in tight spaces while maintaining structural integrity, providing ease of operation in constrained environments.
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 solution provides safe, efficient, and adaptable heavy-duty lifting capabilities, enabling operation at low initial and high lift points, with modularity and compatibility with various power sources, and the ability to simultaneously lift equipment at multiple points, enhancing safety and reducing the risk of unexpected lowering.
Implementation Method 1
a pair of screw jacks on the base; a yoke supported for lifting by the screw jacks
Data Source
AI summary
The present jack apparatus is particularly adapted for heavy duty lifting. The jack apparatus includes a base; a pair of screw jacks; a yoke supported by the screw jacks; a lifting tube supported on the yoke; a shaft coupler coupling the screw jacks; a power unit driving one of the screw jacks and through the shaft coupler also driving the other screw jack; and a housing covering the screw jacks and other components. The pair of screw jacks each have threaded lifting shafts designed to eliminate risk of unexpected lowering of the jack's lifting tube even if power is lost. A jack system is described including two or more of the jack apparatus controlled by a single control for simultaneous operation.