AGV are often designed in three motion modes: only forward; forward and backward; longitudinal, lateral, oblique and rotary motion in all directions.
There are also three types of steering gear structures:
(1) Articulated axle steering three-wheeled models
The front part of the car body is a hinged steering wheel, which is also the driving wheel. Steering and driving are driven by two different electric motors respectively. The rear of the car body is two free wheels, and the steering is controlled by the front wheels to achieve forward driving in one direction. The structure is simple and the cost is low, but the positioning accuracy is low.
AGV Articulated Axle Steering Three-wheeled Models
(2) Differential steering four-wheeled models
There are two driving wheels in the middle of the car body, which are driven by two motors respectively. There is a steering wheel (free wheel) at the front and rear. By controlling the speed ratio of the two wheels in the middle, the steering of the car body can be realized, and the front and rear bidirectional driving and steering can be realized. This method has a simple structure and high positioning accuracy.
AGV Differential Steering Four-wheeled Models
(3) All-wheel steering four-wheel models
There are two integrated driving and steering wheels at the front and rear of the car body, each wheel is driven by its own electric motor, which can walk along any route in the longitudinal, lateral, oblique and turning directions, and the control is more complicated.
AGV All-wheel Steering Four-wheel Models