A controllable hydraulic locking type left and right wheel independent steering mechanism

Abstract

The invention provides a controllable hydraulic locking type independent steering mechanism for left and right wheels. It is composed of power steering mechanism, steering transmission mechanism, hydraulic locking mechanism and electronic control unit. The power of the left and right steering motors flows through the worm, worm gear and gear to drive the left and right racks to move in translation. The horizontal tie rods are connected, and the inner ends of the left and right racks are respectively connected with the piston rod and the cylinder barrel through a ball joint; the left and right chambers of the hydraulic cylinder are connected with the oil storage chamber through an electronically controlled hydraulic valve, and the steering motors of the left and right steering motors are controlled The controller and the electro-hydraulic valve controller communicate through the CAN bus. The mechanism can realize the independent movement of the left and right steering wheels, reduce tire wear through coordinated control, and can correct the driving posture of the car to ensure good steering stability of the car. If necessary, the left and right steering wheels are locked by hydraulic pressure. The overall size of the device is small, the layout is compact, the structure is simple, and it is convenient for installation and application.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, in particular to a left and right wheel independent steering device with a hydraulic locking mechanism. Background technique [0002] With the trend of automobile intelligence and electrification, the traditional mechanical mechanism of the automobile has changed, and the left and right wheel independent steering mechanism has emerged. This steering mechanism can be applied to automobiles with various structures, especially suitable for distributed drive electric vehicles. , this kind of vehicle can realize four-wheel independent drive, has a high degree of control freedom, and can improve the safety, power and stability of the vehicle through a reasonable control algorithm, so it has been widely studied. In the realization of distributed drive electric vehicle structure, each wheel is equipped with a hub / wheel drive system. The steering system can use traditional steering mechanism or indep...

AI Technical Summary

Problems solved by technology

[0003] In the patent CN 205075885 U, the steering motor is arranged vertically above the wheels. Although it can meet the four-wheel independent drive and improve the force state of the steering mechanism, there is no locking mechanism for the left and right wheels. Once a certain steering motor fails, it will not be possible to achieve steering function

In the patent CN 205113422 U, the switch from independent steering to integral steering is realized through the engagement of the slot and the locking teeth, but the engagement process is not smooth enough, the response is slow, and the driving feeling is affected, and due to the lack of self-locking mechanism and the mechanical Connection, it is not conducive to maintaining the driving direction under external interference, and the anti-interference performance is poor

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