Scissor fork type aerial work platform and floating control system thereof

Abstract

The invention discloses a floating control system and a scissor type aerial work platform. The floating control system comprises a floating oil cylinder, a balance valve, a reversing valve and an oil tank. The system further comprises an energy accumulator which is connected with the reversing valve and a pressure sensor; a third electromagnetic reversing valve, wherein two ports of the third electromagnetic reversing valve are connected with an oil return port and an oil outlet of the oil tank respectively, and the other port of the third electromagnetic reversing valve is connected with an oil inlet of the reversing valve through a second one-way valve; an electric proportional overflow valve, wherein two ends of the electric proportional overflow valve are respectively connected with an oil return port and an oil outlet of the oil tank; and a controller which is connected with the motor, the pressure sensor, the electric proportional overflow valve, the third electromagnetic directional valve and the energy accumulator, wherein the motor provides driving force for an oil pump of the oil tank; when the pressure value is larger than or equal to the first preset pressure value, the motor, the electric proportional overflow valve and the third electromagnetic reversing valve are controlled to be powered off; and when the pressure value is smaller than or equal to the second preset pressure value, the motor, the electric proportional overflow valve and the third electromagnetic reversing valve are controlled to be powered on. The application has good operation experience feeling.

Description

technical field [0001] The invention relates to the technical field of aerial work platforms, and more specifically relates to a floating control system. In addition, the present invention also relates to a scissor type aerial work platform comprising the above-mentioned floating control system. Background technique [0002] For the existing off-road scissor-type aerial work platforms, in order to improve the vehicle's walking stability, safety and passing ability under different road conditions, the walking chassis adopts a structure with a front axle floating and a rear axle swinging. [0003] Normally, there are one floating oil cylinder on the left and right sides of the front axle. Under the joint action of the floating oil cylinders, the front axle can swing up and down around the swing axis, and the rear axle also adopts a swing structure. [0004] When the working platform is raised (that is, the scissors are unfolded), and the rear axle is swinging with the ground,...

AI Technical Summary

Problems solved by technology

[0005] However, when the working platform is not raised (that is, the scissors are in a contracted state), the electric or hybrid off-road scissors of the prior art have no floating action, the ability of the vehicle to walk through is relatively weak, and the operating comfort is poor.

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