Device for saving energy during vertical and horizontal motions

A mechanical device (200) for reducing the energy absorbed by an electric motor (M) of a material and/or person handling system (2), wherein said device (200) comprises:

• a first rotating member (108), connected to an external rotor of said motor (M);
• a second rotating member (110), connected to the first rotating member (108) through first transmission means (T1) that develops a transmission ratio substantially equal to unity;
• a third rotating member (112), connected to said second rotating member (110) through second transmission means (C) that develops a transmission ratio substantially equal to unity;
• a fourth rotating member (113), connected to the external rotor of said motor (M) on an opposite side of said motor (M) with respect to said first rotating member (108) and connected to said third rotating member (112) through third transmission means (T2) that develops a transmission ratio substantially equal to unity, in which said fourth rotating member (113) rotates in a same direction as said first rotating member (108);
• a fifth rotating member (210), connected to said fourth rotating member (113) through fourth transmissions means (T3) that develops a transmission ratio substantially equal to unity;
• a sixth rotating member (212) connected to said fifth rotating member (210) through fifth transmissions means (D) that develops a transmission ratio substantially equal to unity;
• said sixth rotating member (212) connected to said first rotating member (108) through sixth transmission means (T4) that develops a transmission ratio substantially equal to unity;
• said second transmission means (C) comprising a series of bevel gears (114, 115, 116, 119) comprising:
• a first bevel gear (114) and a second bevel gear (115) mounted in opposition and both meshed with first planetary gears (124);
• a third bevel gear (116) and a fourth bevel gear (119) mounted in opposition and both meshed with fourth planetary gears (125);
• the second bevel gear (115) and the third bevel gear (116) being fixed with respect to each other;
• said fifth transmission means (D) comprising a series of bevel gears (214, 215, 216, 219) comprising:
• a fifth bevel gear (214) and a sixth bevel gear (215) mounted in opposition and both meshed with third planetary gears (224);
• a seventh bevel gear (216) and a eighth bevel gear (219) mounted in opposition and both meshed with fourth planetary gears (225);
• the sixth bevel gear (215) and the seventh bevel gear (216) being fixed with respect to each other.