Arm support type aerial work platform

Abstract

The invention relates to an arm support type aerial work platform. In order to overcome the defects of a walking system of an existing arm support type aerial work platform, the arm support type aerial work platform is provided, and a closed high-pressure variable pump in a power system of the arm support type aerial work platform comprises a working pump and a displacement control valve for controlling the displacement of the working pump; and an output shaft of a reduction gearbox in a chassis walking system is simultaneously in transmission connection with an integral front-rear drive axle through a transmission shaft, an output shaft of a drive motor is connected with an input shaft of the reduction gearbox, and the drive motor is connected with a working pump through a pipeline to form a closed hydraulic loop. A control system comprises the displacement control valve of the working pump and a complete machine controller connected with an engine rotating speed controller. The arm support type aerial work platform is high in chassis part interchangeability and low in assembly and maintenance difficulty, the whole machine system design is simplified, the machining difficulty and cost of structural parts are reduced, and layout of a whole vehicle is easy.

Description

technical field [0001] The present invention relates to an aerial work platform, more specifically, relates to a boom type aerial work platform. Background technique [0002] The hydraulic travel system is widely used in construction machinery due to its large output torque and high power density. At present, the boom-type aerial work platform in the industry adopts an integral chassis. Four hydraulic motors are installed on both sides of the chassis, and four travel reducers are used to control the wheels. To achieve infinitely variable speed, four variable motors are required. Four travel reducers work and are expensive. [0003] The above-mentioned existing hydraulic travel system mainly has the following problems. The differential speed performance is poor when turning, and it is easy to cause the whole machine to shake when turning in a large range; Insufficient oil supply to the motor on the outside of the middle curve leads to air suction and cavitation of the motor...

AI Technical Summary

Problems solved by technology

At present, the boom-type aerial work platform in the industry adopts an integral chassis. Four hydraulic motors are installed on both sides of the chassis, and four travel reducers are used to control the wheels. To achieve infinitely variable speed, four variable motors are required. Four travel reducers work, expensive

[0003] The above-mentioned existing hydraulic travel system mainly has the following problems. The differential speed performance is poor when turning, and it is easy to cause the whole machine to shake when turning in a large range; Insufficient oil supply to the motor on the outer side of the middle curve leads to air suction and cavitation of the motor, seriously affecting the reliability of the hydraulic travel system

In addition, from the travel control valve to the travel motor high and low speed control, brake control, plus the travel motor's own oil inlet pipe, oil return pipe, and oil leakage pipe, the control of a single motor requires five hoses, the longest of which is nearly three meters. Four-wheel drive requires 20 hoses, which takes up a lot of space on the chassis and greatly increases the difficulty of assembly and maintenance.

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