Automatic-steering mechanism

Abstract

The invention provides an automatic steering mechanism which comprises an angular displacement sensor 1, a controller 2, a reversing valve 3 and a first motor pump group 4; the controller 2 is electrically connected to the angular displacement sensor 1 and the reversing valve 3. The reversing valve 3 includes a first oil inlet port 31, a first oil outlet port 32, a second oil outlet port 33 and acontrol oil port 34. The controller 2 is connected to the control oil port 34. The first oil outlet port 32 and the second oil outlet port 33 are communicated with the oil inlet port 41 and the oil return port 42 of the first motor pump group 4, respectively. Through the angular displacement sensor 1, the controller 2 and the reversing valve 3, the traveling direction is judged and automatically converted, and the structure is simple, the operation is convenient and the cost is low.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to an automatic steering mechanism. Background technique [0002] The crawler hydraulic excavator is divided into two parts, the upper part and the lower part. The upper part and the lower part are relatively rotatable, and a slewing platform, a slewing support and a slewing motor are installed in the middle. When the excavator is turning, the pipeline is smooth and there is no interference. At present, when the crawler hydraulic excavator is walking, it is generally stipulated that the driven wheel is in the front for the positive direction of walking. However, most of the existing excavators are not equipped with relevant slewing recognition systems, so the direction is not distinguished when walking. When walking, the left and right walking motors are controlled by the left and right foot valves of the excavator. walk. The traveling motor controlled by the left pe...

AI Technical Summary

Problems solved by technology

When walking, control the left and right foot valves of the excavator to move forward, and the excavator will move forward; operate the foot valve to move backward, and the excavator will move backward, but when the upper car of the excavator turns more than 90 degrees , the travel motor controlled by the left foot valve becomes the right travel motor, and the motor controlled by the right foot valve becomes the left travel motor; at the same time, due to the lack of a reversing system, the foot valve that controls the excavator moves forward, and the excavator becomes To drive backward; operate the foot valve backward, the excavator turns to drive forward. When the crawler hydraulic excavator is working, the driver needs to distinguish the walking direction from time to time to avoid misoperation. When judging the motor failure, it is necessary to reverse the left and right travel motors or oil inlet hoses. The operation is cumbersome and affects work efficiency.

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