Automotive steering system

We know that, when you turn the car steering wheel, the wheel will turn. This is a causal relationship, is not it? However, in order to make the wheels turning, between the steering wheel and the tire many interesting movement. The car used to change the or restore its direction of travel, dedicated agency called car steering system. The car's steering system is used to change the direction of vehicle travel and keep the car driving straight bodies. The the red flag CA7202E3 car steering system mainly by the steering wheel assembly, steering column assembly, rack and pinion power steering gear and tie rod assembly, power steering pump assembly, power steering piping (high pressure tubing, suction hose, oil return hose), power steering oil tank assembly and wheel assembly.

The steering mechanism mainly composed of a steering wheel, the steering shaft, steering column and other components. The diverter will rotate the steering wheel into a steering arm oscillating or reciprocating linear motion of the rack shaft, and the steering operating force amplifying institution. The steering gear is generally fixed to the car frame or body of the vehicle, the steering force through the diverter after general also change the transmission direction. We know that, when you turn the car steering wheel, the wheel will turn. This is a causal relationship, is not it? However, in order to make the wheels turning, between the steering wheel and the tire many interesting movement.

Automotive steering system works: rack-and-pinion steering system and recirculating ball steering system. Subsequently, we will introduce the power steering, and learn some interesting trends of the steering system, these trends are mostly due to the demand for automobile fuel-efficient features. However, let us look to the vehicle steering operation that must be performed. This is not as simple as you imagine! The rack-and-pinion steering system has quickly become the type commonly used on cars, minivans, and SUV steering system. Its working mechanism is very simple. The rack and pinion gear set is wrapped in a metal tube, each tooth rack end projecting outside of the metal pipe, and connected together by transverse Tie. The pinion gear connected to the steering shaft. When you turn the steering wheel, the gear will rotate, thereby stimulating the rack movement. Rack each tooth end of the cross-rod connected to the steering arm of the steering shaft.

The rack and pinion gear set has two effects: converting a rotary motion of the steering wheel to the rotation of the wheels to the desired linear motion. Provided the gear reducer function, so that the wheel turning more convenient. In most cars, you want the steering wheel to rotate three to four weeks, in order to let the wheels from a lock to another lock bit (from the far left to the far right). The steering gear ratio refers to the ratio of the degree of steering wheel and the wheel-turning degree. For example, if the steering wheel rotation (360 °) to cause the wheel-turning 20 degrees, the steering gear ratio is equal to 360 divided by 20, or 18:1. Higher the ratio, means to make the wheel-turning reached a specified distance, the steering wheel the magnitude of the rotation needs to be bigger. However, since the transmission is relatively high, the force required of the steering wheel will be reduced.

In general, light trucks and sports cars steering ratio is less than large cars and trucks. The lower the ratio, the faster steering response, you only need a slight rotation of the steering wheel to make the wheels turn to reach a specified distance. This is the dream sports car characteristics. Because these small cars are very light, so the ratio is low, turning the steering wheel will not be too laborious some car using the variable gear ratio steering system, in this system, the center and the outside of the rack and pinion gear set having a different tooth pitch (number of teeth per centimeter). This not only can improve the response speed of the automobile steering (rack close to the center position), but also to reduce the biasing force of the wheels close to the steering limit. Power rack-and-pinion when the application of a rack and pinion power steering system, the rack's design will be slightly different.

Portion of the rack comprises a central cylinder with a piston. The piston is connected on the rack. The cylinder has two oil holes, which are located on both sides of the piston. When injected into the high pressure liquid to the side of the piston, forcing the piston moving toward the other side, thereby bringing the rack movement, and thus provides auxiliary power. We will then introduced the high pressure liquid components, it also can decide which side of the supply to the rack of these high-pressure liquid. First of all, let's to understand another steering system. Currently, many trucks and SUVs in the use of a recirculating ball steering system. The lever to turn the wheels, and the rack-and-pinion steering system is slightly different.

Recirculating ball steering a crucible rod. You can use this redirector thought of as two parts. The first part is a metal block with a threaded hole. This piece of metal cut into the periphery of the tooth, the tooth with the drive gear steering arm combination (see Figure). The steering wheel is connected to the bolt-like screw, the screw is inserted in the hole of the metal block. When turning the steering wheel, it will turn the bolt. Due to the relatively fixed between the bolt and the metal block, therefore, is rotated, it will not be like ordinary bolt as drill into the metal block, but to drive the metal block rotation, and further driving gear to rotate the wheel.