US 12,465,950 B2
Motor-vibrator assembly for a vibrating machine
Michele Modenese, Medolla (IT); Raffaello Frati, Medolla (IT); and Giacomo Fabbri, Medolla (IT)
Assigned to OLI S.P.A., Medolla (IT)
Appl. No. 18/035,830
Filed by OLI S.P.A., Medolla (IT)
PCT Filed Nov. 10, 2021, PCT No. PCT/IB2021/060407
§ 371(c)(1), (2) Date May 8, 2023,
PCT Pub. No. WO2022/101800, PCT Pub. Date May 19, 2022.
Claims priority of application No. 102020000026819 (IT), filed on Nov. 10, 2020; and application No. 102021000015338 (IT), filed on Jun. 11, 2021.
Prior Publication US 2023/0415200 A1, Dec. 28, 2023
Int. Cl. B07B 1/42 (2006.01); H02K 7/06 (2006.01); H02K 11/21 (2016.01); H02K 11/33 (2016.01)
CPC B07B 1/42 (2013.01) [H02K 7/063 (2013.01); H02K 11/21 (2016.01); H02K 11/33 (2016.01); H02K 2211/03 (2013.01)] 16 Claims
OG exemplary drawing
 
1. Motor-vibrator assembly for a vibrating machine, the motor-vibrator assembly comprising a plurality of motor-vibrators, each of which comprises an electric motor consisting of a synchronous motor and at least one eccentric mass connected on the drive shaft of the synchronous motor, position sensing means to sense the angular position and measure the angular velocity of the drive shafts, electronic drive means to drive the synchronous motors, and electronic control means, which are configured to control said electronic drive means based on the angular positions sensed and on the angular velocities measured so that the motor-vibrator assembly generates a predetermined vibratory motion; wherein the eccentric mass is fixed to the drive shaft of the relative synchronous motor and is divided into two bodies which are fixed to two respective free ends of the drive shaft, the two free ends of the drive shaft projecting from a casing of the synchronous motor in the area of two respective opposite longitudinal ends of the synchronous motor;
wherein said electronic control means are configured to control said electronic drive means in order to bring the drive shafts in rotation according to respective angular velocity profiles along a turn angle and respective directions of rotation, by keeping the centres of gravity of the eccentric masses in phase with each other or out of phase with each other according to predetermined angular deviations, in order to obtain said predetermined vibratory motion.