The steering gear can be divided into mechanical (no power) and power (with power).

Mechanical steering gear in accordance with the structure of the different forms, and can be divided into gear rack type, circular ball type, worm crank pin type, circular ball crank pin type, worm roller type, etc.. Gear rack type, circular ball type, worm crank pin type.

Rack and pinion steering gear is one of the most simple steering gear. It has the advantages of simple and compact structure, stiffness, low cost, flexible steering, positive and counter attack rate is high, easy arrangement, and is particularly suitable for in matched with the candle suspension and Macpherson suspension, also can directly drive the tie rod, simplified steering transmission mechanism. So it is widely used in cars and light trucks.

Recirculating ball type steering device, counter attack rate is very high, so the manipulation of light, long service life, stable and reliable work; but due to the high rate of counter attack, resulting in easy road impact force is transmitted to the steering wheel.

Power steering gear is the mechanical steering system and steering unit together into the. According to the different energy transfer medium, the power steering gear has the pressure type and the hydraulic pressure type two kinds of. The hydraulic power steering gear according to the mechanical steering, power steering cylinder and steering control valve in the steering device layout and connection of different and divided for integral (mechanical steering gear, power steering cylinder and steering control valve of the design as a whole), semi integral (the mechanical steering gear and steering control valve design together, steering power cylinder independent) and separated (mechanical steering gear is independent, the control valve and the steering power steering cylinder design as a whole) three structure types.