Synchronous lifting mechanism and four-way shuttle vehicle

Abstract

The invention is applicable in the technical field of four-way shuttle vehicles, and provides a synchronous lifting mechanism. The synchronous lifting mechanism comprises a power unit, an execution unit and a control unit; the power unit is used for driving hydraulic oil to move; the execution unit comprises a plurality of oil cylinders which are arranged in series, an oil inlet of each oil cylinder is provided with an overflow piece, the overflow pieces and the oil cylinders are installed in parallel, and the overflow pieces are used for supplementing the oil cylinders with oil in return strokes of the oil cylinders and forcibly resetting piston rods of the oil cylinders; and the control unit is used for controlling the power unit and the execution unit. The synchronous lifting mechanism has the beneficial effects that an automatic compensation function is realized by the aid of internal parallel oil paths of overflow valves and the oil cylinders, the technical problem that the synchronization precision of the lifting mechanism is reduced due to internal leakage and external leakage of a hydraulic system is solved, the stability of the four-way shuttle vehicle during working is improved, and the later maintenance cost and workload are reduced.

Description

technical field [0001] The invention relates to the technical field of a four-way shuttle, in particular to a synchronous lifting mechanism and a four-way shuttle. Background technique [0002] The four-way shuttle is widely used in intelligent three-dimensional warehouse systems at home and abroad. It realizes the functions of pallet lifting and reversing walking through two sets of internal synchronous lifting mechanisms. Its flexibility is high, and the working lane can be changed arbitrarily. It is not only suitable for low-flow, high-density storage, but also suitable for high-flow, high-density storage, and can maximize efficiency, cost, and resources. [0003] At present, the internal lifting mechanism of four-way shuttle vehicles in the industry generally adopts hydraulic synchronous lifting mechanism, which has the characteristics of simple transmission mechanism and strong bearing capacity. [0004] However, in the existing hydraulic synchronous lifting mechanism,...

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Problems solved by technology

[0004] However, in the existing hydraulic synchronous lifting mechanism, since the air in the oil pipes between the series oil cylinders cannot be completely discharged, and the oil cylinder itself has inevitable internal and external leakage, it will cause the four-way shuttle car to work under the constant heavy-duty working condition. The synchronization accuracy of the lower lifting mechanism is reduced, which eventually leads to the failure of the four-way shuttle car to work normally. Therefore, the staff needs to replenish oil to the hydraulic pipeline from time to time according to the usage situation, which greatly increases the maintenance cost and workload in the later period.

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