szállítóer

Szállítóer is a Hungarian term used in engineering and physics to denote the force that drives the movement of a load within a transport or conveying system. In practice, it refers to the driving or tractive force exerted by a mechanism—such as a motor, gearbox, wheel, or belt—that propels a payload along a path. The concept is closely related to, but not identical with, terms like traction, driving force, or húzóerő (pulling force). The form of the term is sometimes written as szállító erő or szállítóerő in technical writings.

Meaning and interpretation

Szállítóer is a vector quantity directed along the transport path. It must overcome resisting forces such as rolling and sliding friction, gravitational components on inclines, inertial effects, and air drag. Depending on the application, the same idea may be described in different contexts as driving force for a conveyor belt, tractive effort for a vehicle, or drive force in powered rollers and gears.

Applications

Common contexts include belt and roller conveyors, screw and chain conveyors, wheel-driven vehicles, and lifting or hoisting systems. In railway and automotive engineering, the term is often equated with tractive effort, the force available at the drive wheels to move the train or vehicle.

Calculation and measurement

A simple energy- and dynamics-based expression for required szállítóer is F = m a + F_friction + F_grade, where F_friction accounts for rolling resistance and sliding friction, and F_grade represents the component of weight along the motion direction. In practice, engineers determine szállítóer using dynamometers, test benches, or performance data from the drive system.

See also: húzóerő, szállító erő, tractive effort, drive force.