Leveraged Tilting Scissors System Reducing Hydraulic Pressure
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Solution Overview
Problem
Current tilting or lifting scissors systems experience stress concentration, deformations, breakages, high hydraulic pressures, and pressure surges due to non-leveraged designs, leading to inefficiencies and structural issues.
Innovation Solution
A leveraged tilting scissors system incorporating a hydraulic cylinder, hinged arms, and a lever arm with a protruding end that slides over a surface, providing damping and supporting the upper arm during movement, allowing for a more compact design and reduced pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If non-leveraged scissors systems are used for tilting or lifting, then the structure and hydraulic system experience stress concentration, deformations, breakages, and high hydraulic pressures, but the system can still perform the basic tilting function
Solution Approach 1:
A lever arm is introduced as an intermediary element between the hydraulic cylinder and the scissors mechanism. The lever arm pivots on the base and transfers force from the hydraulic cylinder to the scissors arms, acting as a mechanical mediator that reduces the direct stress and pressure transmission to the hydraulic system while maintaining the tilting function.
Solution Approach 2:
The lever arm system creates a counterbalancing effect where the lever arm's position and the hydraulic cylinder's force application point are arranged to create opposing moments that balance the load. This counterweight principle reduces the peak hydraulic pressure required by distributing the force more evenly throughout the operation cycle.
2Productivity
If non-leveraged scissors systems are used, then the hydraulic system requires extremely high pressures to overcome resistance, but the system can still achieve the required tilting range
Solution Approach 1:
The lever arm serves as a mechanical intermediary that transforms the hydraulic cylinder's linear motion into rotational motion with amplified torque. This mechanical advantage allows the hydraulic system to operate at lower pressures while still achieving the required tilting power and efficiency.
Solution Approach 2:
The lever arm pivots dynamically during the tilting operation, changing its angle and position to optimize the mechanical advantage at different stages of the tilting range. This dynamic adjustment allows the system to maintain high productivity across the entire operating range while reducing peak power requirements.
3Reliability
If non-leveraged scissors systems are used, then additional limit switches are required to prevent over-travel and mechanical damage, but the basic tilting function is achieved
Solution Approach 1:
The lever arm system provides self-limiting behavior through its geometric constraints and mechanical stops built into the pivot points. The physical structure of the lever arm and its connection points automatically prevent over-travel without requiring external limit switches, making the system self-regulating and safer.
Solution Approach 2:
The lever arm acts as a mechanical intermediary that physically limits the range of motion through its pivot geometry and built-in stops. This mechanical mediation eliminates the need for complex electronic control systems and limit switches, reducing device complexity while maintaining safety.
4Strength
If non-leveraged scissors systems are used, then the structure requires more material and larger components to handle the high stresses, but the tilting function is achieved
Solution Approach 1:
The lever arm distributes and redirects forces through a more efficient mechanical path, reducing the stress concentration on the base structure and scissors arms. This intermediary element allows for lighter structural components while maintaining the required strength, as the forces are better balanced and distributed throughout the mechanism.
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 reduces stress, deformations, and breakages, decreases maximum working pressure, and eliminates the need for additional limit switches, enhancing safety and efficiency while increasing cargo space and reducing fuel consumption.
Implementation Method 1
said lever arm comprises a protruding end for supporting the upper arm in a portion of the movement of said scissors comprising its closed position, by linearly sliding over a surface solidary to the base
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Scissors device for tilting or lifting a movable platform (5,6), comprising at least one hydraulic/pneumatic/electric cylinder (4) for actuating the scissors device and hinged at its first end to a base (7), a scissors having two arms (2, 3) hinged together, one arm coupled to an upper platform and an arm coupled to a base, wherein the lower arm is hinged to the base and the upper arm is hinged to the cargo platform; a lever arm (1) hinged to at least one of the scissors arms and to a second end of the hydraulic cylinder, wherein said lever arm comprises a protruding end (8) for supporting one of the arms in a portion of the start-up/return movement of said scissors comprising its closed (open) position, by linearly sliding on a surface solidary to the base.