1
What is?
known steering gear steering, steering gear, steering system which is the most important member.
2
Function
increasing the steering force is transmitted to the transmission direction and to change the steering force transmission mechanism.
3
Type
Commonly used gear rack type, worm crank pin and the recirculating ball type.
The rack and pinion steering gear
It is the most common diverter. Its basic structure is a pair of rack and pinion gears meshing with each other. When the steering shaft driven by rotation of the pinion, the rack will make a straight line. Sometimes, driven directly by the tie rods to the rack, the steering wheel can be steered. So, this is one of the most simple steering. It has the advantage of simple structure, low cost, steering sensitivity, small size, it can be directly driven by the tie rods. Widely used in the car.
worm steering crank pin
It is an active member is a worm, a driven crank pin for the diverter element. The worm has a trapezoidal thread, the finger-shaped taper on the crank means, formed integrally with the bearing pin and the crank shaft steering arm. When steering, the steering wheel is rotated by the worm, the worm fitted to the tapered side of rotation groove fingers, while the rocker shaft axis about a steering circular motion, so that the crank and pitman drive arm swings, and then passed through a steering mechanism steering gear wheel deflection. This steering gear steering force is typically used on a large truck.
recirculating ball steering gear
recirculating ball steering system, the main structure consists of two parts: the mechanical and hydraulic portion. Mechanical part by the housing cover, side, upper cover, lower cover, recirculating ball screw, a rack nut, the rotary valve spool, fan pinion composition. Wherein two pairs of sub-transmission: one pair of screws, nuts, another pair of a rack, a toothed segment or pinion sector. Between the screw nut and the rack can be recycled with the rolling balls, the sliding friction into rolling friction, thereby improving the transmission efficiency. The advantage of this is that steering, manipulation of light, low wear and long life. The disadvantage is the complex structure, high cost, not as a rack and pinion steering sensitivity.
