Vehicle-mounted hydraulic lifting system and control method thereof

Abstract

The invention discloses a lifting system, and particularly relates to a vehicle-mounted hydraulic lifting system and a control method thereof. The vehicle-mounted hydraulic lifting system comprises a first hydraulic cylinder, a second hydraulic cylinder, a first control valve and a second control valve; the first control valve controls the first hydraulic cylinder to stretch out and draw back; the second control valve controls the second hydraulic cylinder to stretch out and draw back; a first pressure sensor for detecting the pressure in the first hydraulic cylinder is arranged on the first hydraulic cylinder, a second pressure sensor for detecting the pressure in the second hydraulic cylinder is arranged on the second hydraulic cylinder, the first pressure sensor and the second pressure sensor are connected with a control unit, and the control unit is connected with the first control valve and the second control valve. A first comparator selects a reference hydraulic cylinder, so that subsequent control in single lifting is based on the reference hydraulic cylinder, frequent adjustment of the first control valve and the second control valve caused by reference replacement can be prevented, the control precision and the service life of the first control valve and the second control valve can be guaranteed, and the synchronization precision of the first hydraulic cylinder and the second hydraulic cylinder is ensured.

Description

technical field [0001] The invention belongs to the technical field of lifting systems, and in particular relates to a vehicle-mounted hydraulic lifting system and a control method thereof. Background technique [0002] When the load is heavy, the hydraulic lifting system on the vehicle often uses two hydraulic cylinders for lifting. Although this can ensure the lifting capacity, the lifting of the two hydraulic cylinders will be out of sync, which will affect the balance of the vehicle, and There will be potential safety hazards, so the two hydraulic cylinders are required to have high synchronization performance, but the synchronization accuracy of the hydraulic cylinders in the existing double hydraulic cylinder lifting system is low. Contents of the invention [0003] The object of the present invention is to solve the above-mentioned existing technical problems and provide a vehicle-mounted hydraulic lifting system with good synchronization performance of dual hydraul...

AI Technical Summary

Problems solved by technology

[0002]When the load is heavy, the vehicle-mounted hydraulic lifting system often uses two hydraulic cylinders for lifting. Although this can ensure the lifting capacity, the two hydraulic cylinders There will be a situation where the lifting is not synchronized, which will affect the balance of the vehicle and cause safety hazards. Therefore, the two hydraulic cylinders are required to have high synchronization performance, but the synchronization accuracy of the hydraulic cylinders in the existing dual hydraulic cylinder lifting system is low.

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