High-safety shear fork type hydraulic system of aerial work platform

Abstract

The invention relates to a high-safety shear fork type hydraulic system of an aerial work platform. The hydraulic system comprises an oil tank, a steering oil cylinder, walking motors, a walking brakeand a lifting oil cylinder; a hydraulic pump of the oil tank is connected with a triple-link electromagnetic reversing valve; the triple-link electromagnetic reversing valve comprises a first-link electromagnetic valve, a second-link electromagnetic valve and a third-link electromagnetic value, wherein the first-link electromagnetic valve, the second-link electromagnetic valve and the third-linkelectromagnetic valve each comprises a three-position six-way valve core; the first-link electromagnetic valve is used for supplying oil to a steering oil way of the steering oil cylinder; the second-link electromagnetic valve is used for supplying oil to a walking oil way; a walking control valve of the walking oil way is used for controlling switching between serial connection and parallel connection of the walking motors; the third-link electromagnetic valve is used for controlling reversion of the triple-link electromagnetic reversing valve and supplying oil to the walking brake or the lifting oil cylinder so as to control walking braking release or lifting, so the hydraulic system can realize steering, walking, walking braking release and platform lifting driving functions of the workplatform, reduces the integration level, realizes stable steering and walking when the aerial work platform runs at a low speed, prevents pause and transition sensation when the aerial work platformturns a corner, obviously improves the parking impact of a vehicle and greatly improves the safety of the work platform.

Description

technical field [0001] The invention relates to a high-safety hydraulic system of a scissor type high-altitude operation platform, belonging to the technical field of high-altitude operation equipment. Background technique [0002] The scissor-type aerial work platform realizes the high-altitude operation through the hydraulic cylinder of the hydraulic system to push the scissors to fold or unfold. The operation is more convenient and fast, and it is the ideal high-altitude operation professional equipment for modern enterprises to produce efficiently and safely. [0003] The scissor mechanical structure of the scissor-type aerial work platform makes the lifting platform have high stability, wide operating platform and high carrying capacity, and the user can control the mechanical lifting and walking without getting off the lifting platform. The equipment can be controlled on the table to drive to other working places, making the range of high-altitude work larger and suit...

AI Technical Summary

Problems solved by technology

At present, scissor-type aerial work platforms have the following disadvantages: 1. Inability to climb slopes; 2. Vibration when walking at low speeds; 3. The speed of the vehicle is not controlled when going downhill; 4. When the load is too low, the brakes cannot be released and there are abnormal noises; 5. When walking, there will be setbacks when turning suddenly; 6. High integration, inconvenient maintenance; 7. Suddenly release the handle while walking, and the vehicle will have a large impact when parking

Due to the above shortcomings, the aerial work platform has a large potential safety hazard. Therefore, a hydraulic system that solves the above problems is urgently needed

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