Hydraulic cylinder system, lifting boom and crane

CN115405580BActive Publication Date: 2026-05-26SANY MARINE HEAVY INDUSTRY CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SANY MARINE HEAVY INDUSTRY CO LTD
Filing Date
2022-09-26
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In the prior art, the synchronous action of two hydraulic cylinders is easily affected by load, hydraulic cylinder assembly error and structural component processing error, resulting in uneven flow distribution and poor synchronization.

Method used

By designing a hydraulic cylinder system, the first and second hydraulic cylinders are driven separately or synchronously under different conditions using an oil supply pipeline. Combined with solenoid valve control, the individual or synchronous movement of the hydraulic cylinders can be achieved, thereby eliminating synchronization errors.

Benefits of technology

This improves the synchronicity of the hydraulic cylinder during operation, ensuring the synchronous extension and retraction of the cylinder piston rod, and enhancing the accuracy of synchronous actions.

✦ Generated by Eureka AI based on patent content.

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Abstract

This application relates to the technical field of lifting machinery, specifically to hydraulic cylinder systems, lifting booms, and cranes. The hydraulic cylinder system includes a first cylinder, a second cylinder, and hydraulic supply pipes. The hydraulic supply pipes are connected to both the first and second cylinders. When the hydraulic supply pipes are in a first state, they guide hydraulic oil to drive the first cylinder. When the hydraulic supply pipes are in a second state, they guide hydraulic oil to drive the second cylinder. When the hydraulic supply pipes are in a third state, they guide hydraulic oil to drive the first and second cylinders to move synchronously. Thus, when synchronous operation of the two cylinders is required, the hydraulic supply pipes are controlled to be in the third state, guiding hydraulic oil to drive the first and second cylinders to move synchronously. If an error occurs in the synchronization of the first and second cylinders, the hydraulic supply pipes are switched to the first or second state, controlling the first or second cylinder to move independently, thereby eliminating errors in the synchronization process and improving synchronization.
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