Scraper knife lifting system, land leveler and control method

Abstract

The invention provides a scraper knife lifting system, a land leveler and a control method. The scraper knife lifting system comprises a scraper knife, a distance sensor, a gear device, a driving device and a controller, wherein the scraper knife is arranged on a vehicle body in a liftable mode; the distance sensor is used for measuring the distance between the scraper knife and a reference; the gear device is arranged on the vehicle body and is used for setting the gear of the vehicle body; the driving device is arranged on the vehicle body and is connected with the scraper knife; and the controller is respectively connected with the distance sensor, the gear device and the driving device electrically, and is used for controlling the driving device to drive the scraper knife to rise to a preset position according to a distance and the gear. By means of the technical scheme, the scraper knife can ascend and descend for leveling by just operating the gear device during operation, operation is simplified, and the working efficiency is improved; the automatic leveling function of the scraper knife is also introduced, so that the detection range of the distance sensor is effectively expanded, the detection precision of the height and position of the scraper knife is improved, and errors are reduced; and in addition, a running system is flexible and fast in response, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a blade lifting system, a grader and a control method. Background technique [0002] Motor graders are mainly used for land leveling and shaping operations. During the construction process, the grader is always going back and forth. During the forward operation, it is necessary to control the lowering position of the blade; when retreating, it is necessary to raise the blade to a certain height to avoid contact with the ground during the backward process. , which needs to detect the height of the blade at any time. In the prior art, the detection point is generally set at the free end of the oil cylinder, that is, the detection is the stroke of the oil cylinder, not the height of the blade to the ground, which is prone to measurement errors; , the driver first sets the driving handle (or gear) to neutral, then operates the manual lifting device of the blade to lift...

AI Technical Summary

Problems solved by technology

During the construction process, the grader is always going back and forth. During the forward operation, it is necessary to control the lowering position of the blade; when retreating, it is necessary to raise the blade to a certain height to avoid contact with the ground during the backward process. , which needs to detect the height of the blade at any time. In the prior art, the detection point is generally set at the free end of the oil cylinder, that is, the detection is the stroke of the oil cylinder, not the height of the blade to the ground, which is prone to measurement errors; , the driver first sets the driving handle (or gear) to neutral, then operates the manual lifting device of the blade to lift the blade to a certain height, then sets the driving handle to the reverse gear, and then drives backward.

With such an operation step, when the gear shifter is in the forward gear position, the blade can only be moved forward by lowering it to the initial height position, and the driver needs to manually control the lifting of the blade; in addition, in the prior art, electronically controlled Switching reversing valve, no angle sensor, unable to realize automatic blade leveling function during forward operation

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