Omni-directional steering device for intelligent automobile

Abstract

The invention discloses an omni-directional steering device for an intelligent automobile. The omni-directional steering device is composed of a steering mechanism, a driving mechanism, a brake mechanism and a vibration reduction mechanism. The steering mechanism comprises a supporting frame, a steering motor and a steering knuckle; one end of the supporting frame is arranged on an automobile body in a fastened mode, and the other end of the supporting frame is inserted into the steering knuckle and connected with the steering knuckle through a spline shaft; the driving mechanism adopts the working principle of a disc-type permanent magnet brushless direct current motor, and a stator is fixedly connected with a motor shaft disc through a flat key; the outer side of a rotor is fastened on a spoke through a bolt, the inner side of the rotor and a brake disc of the brake mechanism are formed into a whole, braking calipers comprising braking oil cylinders and friction pieces are arranged at the edge of the brake disc, and thus the brake mechanism is formed; and the vibration reduction mechanism is composed of magnetorheological dampers and vibration reduction springs and can make the steering knuckle to move up and down relative to the shaft disc of the motor, so that vibration reduction and buffering are achieved. The automobile can not only steer by a large angle on site but also travel transversely and obliquely, and the omni-directional steering device for the intelligent automobile has the advantages of compact structure, high reliable degree and the like.

Description

technical field [0001] The invention relates to a steering device, in particular to an omnidirectional steering device for a smart car, belonging to the technical field of smart cars. Background technique [0002] The wheel steering angle of existing smart cars is generally limited to between 25° and 40°, so a large adjustment space is required when parking, and with the rapid increase in the number of cars and the gradual increase in urban population density, the original limited city Living space has become tighter, so it is urgent to develop an omni-directional steering device for smart cars to deal with the increasingly tight parking space. [0003] In the current research field, there are some solutions to this problem. For example, the patent document No. 200810000129.7 discloses a mechanical transmission technology for electric vehicles to move laterally and rotate the body clockwise and counterclockwise, and the patent document No. 201521090604.6 discloses A hub mot...

AI Technical Summary

Problems solved by technology

[0002] The wheel steering angle of existing smart cars is generally limited to between 25° and 40°, so a large adjustment space is required when parking, and with the rapid increase in the number of cars and the gradual increase in urban population density, the original limited city Living space has become tighter, so it is urgent to develop an omni-directional steering device for smart cars to deal with the increasingly tight parking space

[0003] In the current research field, there are some solutions to this problem. For example, the patent document No. 200810000129.7 discloses a mechanical transmission technology for electric vehicles to move laterally and rotate the body clockwise and counterclockwise, and the patent document No. 201521090604.6 discloses A hub motor electric vehicle steering device for in-situ steering and lateral driving, etc., but these technical means all use traditional mechanical steering devices, which not only occupy a large space, but also have a complex structure, which is not conducive to large-scale popularization and application

In addition, Patent No. 201621307844.1 discloses a conversion device for omni-directional steering of electric vehicle wheels, which connects the damper piston rod with the spline sleeve of the steering part, and explains that when the piston rod moves up and down , the spline sleeve also moves up and down, but when the vehicle is excited by a large road surface, the reduction gear set of the steering device may lose its steering function, and the unsprung mass is relatively large because the vehicle uses electric wheels. Large, the overall stability of the vehicle is reduced

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