Abstract: A mechanical device for reducing the energy absorbed by an electric motor of a handling plant. The device includes a first rotating member moved by the motor of the handling plant. The device also includes a second rotating member connected to the first member through a first transmission apparatus. A third rotating member is connected to the second rotating member through a second transmission apparatus, which develops a transmission ratio equal to unity. The device further includes a fourth rotating member operatively connected to the rotor of the electric motor. The fourth rotating member and the third rotating member are connected through a third transmission apparatus, which develops a transmission ratio equal to unity. The device includes a sixth rotating member connected to a fifth rotating member through a fifth transmission apparatus. The sixth rotating member and the first rotating member are connected through a sixth transmission apparatus.

Abstract: The present invention relates to a mechanical device for reducing the energy absorbed by an electric motor of a handling plant. The device according to the invention comprises at least one first rotating member moved by the motor of the handling plant. The device also comprises a second rotating member connected to the first member through first transmission means. At least one third rotating member is connected to the second rotating member through second transmission means, which develop a transmission ratio equal to unity. The device further comprises a fourth rotating member operatively connected to the rotor of the electric motor. The fourth rotating member and the third rotating member are connected through third transmission means, which develop a transmission ratio equal to unity. The device comprises a sixth rotating member connected to a fifth rotating member through fifth transmission means which develop a transmission ratio equal to unity.

Abstract: A mechanical device for reducing the energy absorbed by an electrical motor of a hoisting plant. The device includes at least one first rotating member moved by the motor of the hoisting plant. The device also includes a second rotating member connected to the first member through a gear transmission. At least one third rotating member is connected to the second rotating member through a bevel-gear transmission. The device further includes a fourth rotating member operatively connected to the rotor of the electric motor. The fourth rotating member and the third rotating member are connected through a transmission with flexible elements or through a gear transmission which develop a transmission ratio equal to unity. The transmission elements of the device are designed to enable rotation of the fourth rotating member in a direction of rotation concordant with that of the first rotating member.

Abstract: The present invention relates to a mechanical device for reducing the energy absorbed by an electric motor of a hoisting plant. The device according to the invention comprises at least one first rotating member moved by the motor of the hoisting plant. The device also comprises a second rotating member connected to the first member through first transmission means. At least one third rotating member is connected to the second rotating member through second transmission means with flexible elements, which develop a transmission ratio equal to unity. The device further comprises a fourth rotating member operatively connected to the rotor of the electric motor. The fourth rotating member and the third rotating member are connected through third flexible-element-transmission means, which develop a transmission ratio equal to unity.

Abstract: The invention relates to a device for stretching compensation in lift cables, arranged within a lift unit, with a lift shaft, a cabin (1) (FIGS. 1 and 2), a counter-weight (7) (FIGS. 1 and 2), at least one lift cable (3) (image 1), said cabin and said counter-weight on the pulley (4) (image 1 and 2) and a cable (9) (FIGS. 1 and 2) connected to the underside of the cabin and the counter-weight (FIG. 2) running around the freely-rotating pulley (10) (FIGS. 1 and 2) in the lift shaft. According to the invention, the device comprises a drive, mechanically connected to the end of at least one cable rod (27) (FIG. 4) on the underside of the cabin (11) (FIG. 2) and passing through pressure springs applied to the cabin cable section and a sensor (34) on the spring (12) (FIGS. 1 and 2), which serves to trigger the drive (16) (FIGS. 1, 2, 3 and 4). Two solutions to achieve automatic load compensation on a lift into which a load is charged are given.

Abstract: An electric motor (10) with a low number of revolutions comprises a rotor (17) powered by three-phase alternating voltage, a series of magnets (21, 22) and a coil forming a stator (24), in which the rotor (17) and the stator (24) have the same number of magnetic poles. The stator (24) is powered with direct voltage, and the frequency of the rotor voltage (17) is varied to obtain a predetermined number of rpm of the motor and to vary the acceleration and deceleration conditions of the motor. A thrust bearing opposes the effort of the falling brake disc.

Abstract: An electric motor (10) with a low number of revolutions comprises a rotor (17) powered by three-phase alternating voltage, a series of magnets (21, 22) and a coil forming a stator (24), in which the rotor (17) and the stator (24) have the same number of magnetic poles. The stator (24) is powered with direct voltage, and the frequency of the rotor voltage (17) is varied to obtain a predetermined number of rpm of the motor and to vary the acceleration and deceleration conditions of the motor. A thrust bearing opposes the effort of the falling brake disc.