Hydraulic control system and working machine

By integrating the working valve core and combining the oil circuit within the main valve of the excavator, the main valve structure is simplified, solving the problem of the large space occupied by the main valve. This achieves convenient maintenance and efficient hydraulic oil delivery, thereby improving the working efficiency of the excavator.

CN224496949UActive Publication Date: 2026-07-14ZOOMLION EARTHMOVING MASCH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZOOMLION EARTHMOVING MASCH CO LTD
Filing Date
2025-08-01
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

When existing excavators have three or more working valve cores installed in the main valve, the main valve occupies a large space and is inconvenient to maintain.

Method used

The main valve integrates at least three working valve cores. Two working oil circuits are merged to form a first merging oil circuit, and the remaining working oil circuits are merged with the first merging oil circuit to form a second merging oil circuit. The second merging oil circuit is located outside the main valve, which simplifies the main valve structure and reduces space occupation.

Benefits of technology

This reduces the overall space occupied by the main valve, facilitates the maintenance of the hydraulic control system, and improves the merging efficiency of hydraulic oil and the working efficiency of the bucket.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224496949U_ABST
    Figure CN224496949U_ABST
Patent Text Reader

Abstract

The application relates to the technical field of working machines, and discloses a hydraulic control system and a working machine. A main valve comprises at least three integrated working valve spools, each of which is connected with a working oil path at an oil port on the side of an executing element. Two working oil paths are combined to form a first combined oil path, which is located inside the main valve. The remaining working oil path is combined with the first combined oil path to form a second combined oil path, which is connected with the executing element and located outside the main valve. In the application, at least three working valve spools are arranged in the main valve. Two working oil paths are combined to form the first combined oil path arranged inside the main valve, and then the first combined oil path is combined with the remaining working oil path to form the second combined oil path arranged outside the main valve. The overall space occupied by the main valve is reduced, and the hydraulic control system is convenient to maintain.
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