Screening mode switching control system and excavator

By adjusting the current-pressure curve of the electronically controlled valve group, the excavator can quickly switch working modes without changing the implements and valve core, which solves the problem of low efficiency in soil screening operations of existing excavators and improves work efficiency.

CN224395655UActive Publication Date: 2026-06-23SANY HEAVY MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SANY HEAVY MACHINERY
Filing Date
2025-07-02
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing excavators require frequent changes of tools or valve cores when switching working modes, resulting in low efficiency and cumbersome processes, making it impossible to quickly achieve soil screening operations.

Method used

By adjusting the current-pressure curve of the electronically controlled valve group through the controller, the electronically controlled valve group can have different current-pressure curves in the soil screening mode and the normal mode, so that the excavator can quickly switch working modes without changing the tools and valve core.

Benefits of technology

It improves the efficiency of excavators switching between soil screening mode and normal mode, enhances work efficiency, and avoids the inconvenience caused by frequent replacement of tools and valve cores.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224395655U_ABST
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Abstract

The application provides a soil screening mode switching control system and an excavator, which can be used in the technical field of engineering machinery. The system comprises an electric control handle, a controller, an electric control valve group, a main control valve and an execution device connected in sequence. The electric control handle is configured to send an operation signal to the controller. The controller is configured to output a first control current to the electric control valve group based on the operation signal. The electric control valve group is configured to send a first hydraulic signal to the main control valve based on the first control current. The main control valve is configured to control the execution device to perform a work action based on the first hydraulic signal. The controller is configured to set a current-pressure curve of the electric control valve group to switch the work mode of the electric control valve group. The work mode includes a soil screening mode and a regular mode. The system of the application adjusts the current-pressure curve of the electric control valve group through the controller, so that the excavator can quickly switch between the soil screening mode and the regular mode, and the work efficiency of the excavator is improved.
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