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In the modern sense, the pivot representsIs a structural element of the rotary mechanism of the wheel, designed to give it the required degrees of freedom. This concept combines various design mechanisms, united by a common purpose. In one form or another, the pivot is part of almost all wheeled vehicles.

Development of pivot design

Initially, the pivot wasRod, on which was fixed the common turning axis of the front pair of wheels of the horse-drawn carriage. When the first cars appeared under the pivot, they understood the individual turning axis on which the wheel was fitted with a pair of roller bearings. From the middle of the 20th century, the traditional design of the pivot mechanism for rotating automobile wheels was replaced by spherical and hemispherical hinges. This solution has made it possible to simplify the design of the kingpin, allowing due to the presence of one element to ensure both rotation of the wheel and its rotation. The wheel is rotated in accordance with the driving signal of the driver, which is carried out through the steering gear.

Application on modern cars

Modern spherical hinges pivotParts have increased reliability and ability to work for a long time in intensive mode without intermediate lubrication. The pivots of this design have been widely used as suspension elements for off-road vehicles and load-carrying capacity. They are used in the rotary mechanisms of trucks, pick-up trucks and part of SUVs. Driving characteristics depend on the characteristics of the kingpin as longitudinal and transverse angles naklona.Pri appreciable play in the emergence of a pair of pivot assembly requires replacement. Wear the cause may be a ride on roads with poor or damaged coating, lack or loss of grease, imbalance of wheels. The replacement pivot is supplied as a separate assembly unit, the design of which is individual for each car. The contact pin cavity laid smazka.V cars new designs applied suspension type "McPherson", whose design allows the wheels to perform rotary motion due to the mobility of the suspension strut. In this case called imaginary pivot wheel axle, around which it is rotated by a control signal of the driver.