What device is found between the electric motor and winding drum for elevators suspended by steel wire?

The device that is found between the electric motor and winding drum in elevators suspended by steel wire is the brake. This component is essential for ensuring the safe operation of the elevator system. The brake works by controlling the movement of the elevator and preventing it from moving unintentionally. In the event of a power failure or other emergency, the brake is crucial as it holds the elevator car in place, thereby enhancing passenger safety.

Brakes in elevator systems typically engage automatically when the elevator is not in use or in an emergency situation, providing a critical safety feature. Their positioning between the motor and the winding drum is strategic, as it allows for immediate engagement of the brakes when needed, providing a failsafe against uncontrolled descent.

The other components mentioned, such as gears, cables, and bearings, play different roles in the elevator system. Gears are involved in transferring motion and adjusting speed, cables are used to lift and lower the elevator car, and bearings support the movement of rotating parts. While they are all important to the elevator's function, they do not serve the same safety-critical purpose as the brake.