Electric power steering system of electric piling car and control method

Abstract

The invention discloses an electric power steering system of an electric piling car, which comprises a control handle, a transmission mechanism, a power steering gear, a driving unit and a driving wheel, the control handle is connected with the input end of the power steering gear through the transmission mechanism, and the output end of the power steering gear is connected with the driving unit through a driving connecting seat; the driving unit is used for controlling the driving wheels to walk, the input end and the output end are connected through a mechanical transmission device, the control handle is used for driving the input end to rotate through the transmission mechanism, when the power-assisted steering gear is powered on, the torque of the output end is increased, and when the power-assisted steering gear is powered off, the mechanical transmission device drives the output shaft to rotate so as to drive the driving unit to rotate. And the driving wheels are further driven to steer. The invention further discloses an electric power steering control method of the electric piling car, and compared with pure manual steering, the working intensity can be reduced, and the operation comfort can be improved; compared with a pure electric power-assisted steering structure, the electric power-assisted steering system is simple in structure, low in cost and higher in steering reliability.

Description

technical field [0001] The invention relates to the technical field of electric stacker trucks, in particular to an electric power steering system of an electric stacker truck, and also relates to an electric power steering control method of an electric stacker truck. Background technique [0002] Electric stacker trucks usually have a four-point structure, and the driving wheel is located on one side of the vehicle body. In order to facilitate the operator to stand on the pedal to operate, the control handle is located in the middle of the vehicle body. Therefore, the driving wheel and the control handle are not on the same axis and cannot be directly connected. Together, the steering force needs to be transmitted through the linkage. [0003] At present, there are two ways to transmit steering force: one is manual steering, which connects the control handle and the driving wheel through the transmission mechanism; the other is electric steering, which detects the steering ...

AI Technical Summary

Problems solved by technology

[0004] All the steering force of manual steering needs to be provided manually. The steering force is large, the operation is laborious, and the comfort is poor. Especially when facing heavy loads, it is difficult to control the steering of the driving wheels; If the component fails or the power is lost, the steering ability will be lost, so the reliability is poor, and there is a delay in steering, resulting in a time difference between the operator operating the handle and the steering of the vehicle, which poses a certain safety hazard

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