Aerial Work Platform Floating Axle Locking Against Cylinder Sliding
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Solution Overview
Problem
Existing aerial work platforms face issues with overturning due to locking failure of hydraulic cylinders, leakage of hydraulic oil, and sliding of hydraulic cylinders, which can lead to safety accidents.
Innovation Solution
A floating device for an aerial work platform is designed with a pressure oil source, a controller, left and right floating devices, each comprising a hydraulic cylinder, a balance valve, and a locking device. The controller manages the floating and locking of the hydraulic cylinders through balance valves and locking devices, ensuring the stability of the aerial platform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single locking device is used for the hydraulic cylinder, then the device complexity is reduced, but the reliability decreases due to potential locking failure, leakage, or sliding
Solution Approach 1:
The patent applies prior cushioning by introducing a backup locking mechanism (locking device with locking valve) that activates automatically if the primary balance valve fails. This redundant system provides a safety net before failure occurs, ensuring the hydraulic cylinder remains securely locked even if the primary balancing mechanism malfunctions or leaks.
Solution Approach 2:
The patent changes the system from a single-valve configuration to a dual-component configuration (balance valve + locking valve). This parameter change in system architecture allows the locking function to be maintained through alternative pathways, transforming a single point of failure into a resilient system with multiple functional states.
2Adaptability or versatility
If the floating cylinder position is allowed to move freely during floating, then the adaptability to ground changes is improved, but the safety deteriorates due to uncertain position causing potential overturning
Solution Approach 1:
The patent implements dynamics by creating a system that transitions between two states: during floating operation, the balance valve allows the hydraulic cylinder to move dynamically to adapt to ground changes; during locking operation, the locking device fixes the position to ensure safety. This dynamic switching between flexible and fixed states resolves the contradiction between adaptability and safety.
Solution Approach 2:
The locking device acts as a pre-prepared safety mechanism that can be activated if the floating cylinder moves to an unsafe position or if the balance valve fails. This beforehand cushioning ensures that even if the adaptive floating mechanism malfunctions, the system can transition to a safe locked state to prevent overturning.
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 effectively prevents overturning by ensuring the hydraulic cylinders remain locked and stable, even in case of balance valve failure or hydraulic oil leakage, thereby enhancing the safety and stability of the aerial work platform.
Implementation Method 1
the pressure oil source provides pressure oil for the action of the left hydraulic cylinder and right hydraulic cylinder
Implementation Method 2
the left balance valve is set on an oil port of the left hydraulic cylinder, the left balance valve is connected with the pressure oil source through the left locking device
Data Source
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AI summary
A floating device for an aerial work platform, comprising a pressure oil source (100), a controller (200), a left floating device, and a right floating device, a chassis (700), and a swing axle (600). The left floating device comprises a left hydraulic cylinder (300), a left balance valve (310), and a left locking device; the right floating device comprises a right hydraulic cylinder (400), a right balance valve (410), and a right locking device; one end of the left hydraulic cylinder (300) and one end of the right hydraulic cylinder (400) are hinged on the chassis (700); the swing axle (600) is hinged with the chassis (700); the other end of the left hydraulic cylinder (300) and the other end of the right hydraulic cylinder (400) are hinged on two opposite ends of the swing axle (600); and the left locking device and the right locking device constitute second-level locking of the left hydraulic cylinder (300) and the right hydraulic cylinder (400), thereby ensuring that the aerial work platform will not tip over due to the sliding of the hydraulic cylinders.