Forklift trucks, loaders, and other steering wheels come with assisted handballs when they come out. Drivers often operate the steering wheel with their left hand and the right-hand control lever. One-handed operation of the steering wheel is required.
Passenger cars such as cars do not need or can be installed on the steering wheel, and all of them are retrofitted. The installation of booster ball decoration on cars has more significance, less practical significance, and even affects driving safety. Because the turn of a car is different from that of an engineering vehicle. Friends who have driven, especially those who have driven cars and construction vehicles (agricultural vehicles) will have the following feelings: The steering wheel of a car is more sensitive, and it can be filled in two and a half laps. A slight displacement of the steering wheel can change the angle of the steering wheel. The direction will change accordingly. When driving an engineering vehicle, you will find that the steering wheel is relatively dull, and the number of full turns of the steering wheel is much higher than that of a car. When the steering wheel is displaced, the angle at which the steering wheel angle changes is also relatively small. In fact, this is caused by the difference of the steering wheel.
Because of the directional assistance, the steering of the car's steering can be lower than designed, and even if the steering is lower, the steering will not be heavy. The turn is relatively low, and the vehicle does not need to operate the steering wheel significantly during normal driving. It is easier to drive. Gently turning the steering wheel can change and correct the vehicle's motion trajectory, reduce driving difficulty and improve comfort. You do not need to operate the steering wheel during normal driving. You only need to fix the rudder when driving straight, and keep the steering wheel angle unchanged. If a power-assisted handball is installed, the steering of the handball to the rudder when driving straight is very demanding for the operator. It is far less secure than holding the steering wheel with one hand and is dangerous. The only use is to play rounds in place, handball is more convenient to use. In addition to playing in situ, handball is even an issue. The steering gear of vehicles such as forklifts and construction machinery is relatively high, especially for vehicles with full hydraulic steering. The steering gear is equivalent to a hydraulic control valve that controls the expansion and contraction of the cylinder to achieve steering assistance.
This type of construction machinery must use a full hydraulic power assistance system because of its large load capacity and very high requirements on the steering gear. This steering gear does not have the rack system of traditional automobile steering gear. The steering wheel controls the hydraulic steering gear. The principle of hydraulic steering gear is not the same as that of ordinary hydraulic control valves. The control valve only acts as a switch to change the direction of liquid movement. . The hydraulic steering gear is a metering motor, which can accurately control the amount of hydraulic oil output to control the expansion and contraction of the cylinder, and play a holding role. Theoretically, there is hydraulic power, and the turn ratio can be designed very low. However, forklifts and forklifts have high requirements for directional control accuracy during work. Often, distances of 1 cm or less can be precisely adjusted by controlling the steering machine.
Fine adjustment, which places high demands on the steering gear. The steering ratio is too low, and it is difficult to precisely control the direction like a car. The steering angle of the car's steering wheel will change, and the steering wheel of the car is difficult to control when there is little demand for wheel angle changes. Compared with a high steering machine, the steering wheel has a large steering wheel angle and a small wheel turning angle, so that the wheel angle can be accurately controlled.
The steering wheel of a car can be understood as a coarse adjustment, with low control accuracy but high efficiency. Forklift steering wheel can be understood as fine tuning and more precise tuning, but with low efficiency. Loading handball can greatly reduce driver labor intensity without affecting driving safety. Now high-end cars have adopted a variable-turn steering system, which automatically reduces the steering ratio at low speeds, improves steering efficiency, makes it easier to turn wheels in place, and reduces the number of steering wheels. When driving at high speed, the steering ratio is automatically increased to increase the accuracy of directional control.
