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The task of a gear drive is to establish the connection between the powerplant and the working machine, to transmit energy and to tune the parameters of the powerplant’s mechanical power (T – torque, ω – angular velocity) to the demands of the working machine. In the special case when the nominal working points of the powerplant and the working machine are identical, they can be connected directly by a clutch, but in most cases there is a need to modify the torque and the angular velocity, performed by a gear drive. Classified according to the type of energy used, drives may be mechanic, electric, hydraulic and pneumatic drives. (The main profile of our company is manufacturing components used in mechanical drives, therefore in the following we are only discussing these). Mechanical drives may be classified into two types based on power transmission, shape or force-based drives, also in both types we can differentiate between drives with or without mediator elements.
Shape-based drives without a mediator element are gear drives (cylindrical gears, bevel gears, hypoid gears, spiroid gears, worm-gear drives). Shape-based drives with a mediator element are chain drives and toothed belt drives. A force-based drive without a mediator element is the friction drive. Force-based drives with mediator elements are belt drives, and steel belt drives. In terms of gear ratio, we differentiate between constant ratio drives, changing ratio drives and variable ratio drives. Constant ratio drives are gear, worm, belt, chain and friction drives. Changing ratio drives are implemented by using non-circular gears and crank drives. Changing the ratio may be implemented by using selectable gears or drives with continuous ratios.