Driving and hydraulic system of electric forklift

Abstract

The invention discloses a driving and hydraulic system of an electric forklift. The driving and hydraulic system of the electric forklift comprises a forklift control hydraulic system, a forklift working hydraulic system and a forklift driving system. The forklift control hydraulic system is parallel to the forklift working hydraulic system; the forklift control hydraulic system comprises a secondhydraulic motor and a second hydraulic pump which is in power connection with an output shaft of the second hydraulic motor; and the forklift working hydraulic system comprises a first hydraulic motor and a first hydraulic pump which is in power connection with an output shaft of the first hydraulic motor. By arrangement of two separate hydraulic systems, corresponding hydraulic cylinders and hydraulic motors can be started according to actual working conditions, therefore, the problem of excessive energy consumption caused by using a single high-power hydraulic pump and a hydraulic motor canbe avoided; and in a steering or braking process, flow distribution of lifting and inclined hydraulic pipelines can be avoided, and thus, the influence of braking or steering on the working performance of the forklift is avoided.

Description

technical field [0001] The invention relates to the technical field of forklift equipment, in particular to an electric forklift driving and hydraulic system. Background technique [0002] At present, four-wheel counterbalanced electric forklifts mainly have front-wheel single drive and front-wheel double drive, among which single drive is more. [0003] The single-drive forklift has a simple structure and low cost; the double-drive forklift has a more complex structure and relatively high cost. For single-drive forklifts, the current steering mainly adopts hydraulic power steering, and its steering hydraulic power comes from the shunt part of the hydraulic power for the loading and unloading device. The forklift steering realized by this method consumes a lot of energy and will affect the performance of the loading and unloading device. In addition, because a single hydraulic pump is used to provide high-pressure oil for steering, braking, lifting, and tilting, due to the ...

AI Technical Summary

Problems solved by technology

[0003] Single-drive forklifts are simple in structure and low in cost; dual-drive forklifts are more complex in structure and relatively high in cost

For single-drive forklifts, the current steering mainly adopts hydraulic power steering, and its steering hydraulic power comes from the shunt part of the hydraulic power for the loading and unloading device. The forklift steering realized by this method consumes a lot of energy and will affect the performance of the loading and unloading device. In addition, because a single hydraulic pump is used to provide high-pressure oil for steering, braking, lifting, and tilting, due to the large load, a large-power hydraulic pump is required. Therefore, in the process of use, when any equipment needs to work, all The high-power hydraulic pump is required to work, so the energy consumption is too large and the use is uneconomical

[0004] At the same time, the traction motor and drive axle of this type of single-drive forklift often adopt the traditional parallel arrangement or T-shaped arrangement, which has a low integration level and is not conducive to the vehicle structure layout.

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