Scissors Lift System for Shallow Pit Vehicle Installation
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Solution Overview
Problem
Conventional hydraulic lifts for vehicles require deep trenches, are costly, and pose contamination risks due to high hydraulic fluid usage and leakage, making installation complex and environmentally hazardous.
Innovation Solution
A scissors lift system with a support structure and carriage that allows for the lifting of vehicles by axles, using a reduced amount of hydraulic fluid and minimizing ground contact, enabling installation in shallower pits and reducing environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional hydraulic lift uses a deep trench to accommodate the hydraulic cylinder casing, then the lift can be installed and operated, but the installation cost and complexity increase significantly
Solution Approach 1:
The lifting system is divided into multiple scissor mechanism stages, allowing the lift to achieve sufficient height without requiring a deep trench. The segmented scissor structure distributes the lifting function across multiple articulated components rather than requiring a single deep-bore cylinder
Solution Approach 2:
The invention transitions from a vertical deep-trench configuration to a horizontal/scissor-based expansion mechanism. The lift achieves vertical displacement through the geometric expansion of scissor arms in a two-dimensional plane rather than requiring vertical bore depth
2Reliability
If a conventional hydraulic lift uses a deep trench with fixed concrete structure, then the hydraulic cylinder can be accommodated, but the installation and removal become difficult and expensive
Solution Approach 1:
The support structure transitions from a fixed concrete embedding to a dynamic, adjustable scissor mechanism that can be installed and removed as needed. The scissor arms provide structural support through their geometric configuration rather than requiring permanent concrete foundations
Solution Approach 2:
The scissor mechanism's own geometric structure provides the necessary support and stability, eliminating the need for external concrete reinforcement. The interlocking scissor arms self-support the lifting load through their articulated design
3Force
If a conventional hydraulic lift uses large amounts of hydraulic fluid, then the hydraulic cylinder can generate sufficient lifting force, but the risk of ground contamination increases
Solution Approach 1:
The system uses a reduced-volume hydraulic system with strategic placement of fluid reservoirs and pressure distribution across multiple scissor points, minimizing the total hydraulic fluid volume while maintaining sufficient lifting force through mechanical advantage
Solution Approach 2:
The scissor mechanism converts the potential harm of hydraulic fluid leakage into benefit by distributing the lifting force across multiple contact points, reducing the pressure and volume of fluid needed at any single point, thereby minimizing contamination risk
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 scissors lift system effectively lifts vehicles with reduced hydraulic fluid usage, minimizing ground contamination and installation complexity, while allowing for flexible positioning and efficient maintenance operations.
Implementation Method 1
Pressurized hydraulic fluid is directed into the casing, so that the fluid acts against a first end of the piston. The force of the fluid on the piston causes the piston to extend from the casing.
Data Source
AI summary
A preferred embodiment of a system includes a lifting device for lifting a motor vehicle, a support structure for mounting the lifting device in a pit, and a carriage for supporting the lifting device from the support structure and being movable within the support structure. The system also includes a cover coupled to opposite sides of the carriage so that the cover extends away from the carriage and continuously between the opposite sides of the carriage.