Integrated drive-by-wire independent steering system based on double wishbone suspension

Abstract

The invention provides an integrated drive-by-wire independent steering system based on a double wishbone suspension. The integrated drive-by-wire independent steering system based on the double wishbone suspension comprises a servo motor assembly, a motor bracket, an upper swinging arm, a lower swinging arm, a spherical hinge, a steering knuckle, a brake disc and a hub bearing assembly, wherein the servo motor is used as a steering power source. The invention is advantaged in that the integration of the suspension and the steering system is realized through combining advantages of the double wishbone independent suspension and the drive-by-wire steering system; a steering linkage system of the traditional steering system is eliminated, interference between the steering linkage system and a suspension guiding linkage system is completely avoided, the steering angle is close to plus or minus 90 degrees through reasonable layout, and zero steering radius in-situ steering is realized in the whole vehicle; as the steering servo motor assembly is placed on a wheel side and a transmission chain for steering motion is short, the steering response is sensitive and the efficiency is high; as the motor and a master pin are integrated, wheel rotation and hop do not interfere with each other and the toe-in interference of the steering transmission chain during the wheel hop is prevented; and the types of key parts are greatly reduced and the mass manufacturing cost is reduced.

Description

technical field [0001] The invention relates to an integrated control-by-wire independent steering system based on a double-wishbone suspension, in particular to a control-by-wire independent steering system in which a steering motor is arranged on a steering knuckle of a double-wishbone suspension, and belongs to the technical field of electric vehicles. Background technique [0002] The traditional steering system transmits the steering action of the driver operating the steering wheel to the steering wheels through the steering mechanism. At the same time, the steering trapezoidal mechanism ensures a certain functional relationship between the inner and outer wheel angles during steering. , resulting in the interference of the suspension guide mechanism and the steering rod system, which will have an adverse effect on the ride comfort and handling stability of the car, and it will not be possible to achieve large-angle steering. Existing independent steering systems often...

AI Technical Summary

Problems solved by technology

[0002] The traditional steering system transmits the steering action of the driver's steering wheel to the steering wheels through the steering mechanism. At the same time, the steering trapezoidal mechanism ensures a certain functional relationship between the inner and outer wheel angles during steering. , resulting in the interference of the suspension guide mechanism and the steering rod system, which will have an adverse effect on the ride comfort and handling stability of the car, and it will not be possible to achieve large-angle steering

Existing independent steering systems often use simple suspension forms such as candle suspensions. For example, the invention patent CN102431586A adopts candle suspensions. The kingpin shaft and the sleeve can be driven by splines to transmit torque and slide axially. , with the sliding wear between the inner and outer splines, the gap between the splines continues to increase, and the error of the spline fit will affect the rotation angle transmitted to the wheel, so higher requirements are placed on the processing and material of the splines , which increases the processing cost

The suspension system is connected in parallel with the steering system. Although the structure is simple, it is difficult to achieve better suspension performance

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