US 11,894,746 B2
Gearless torque motor catching structure
Ulf Richter, Baden (CH); and Radim Capla, Baden (CH)
Assigned to ABB Schweiz AG, Baden (CH)
Filed by ABB Schweiz AG, Baden (CH)
Filed on Apr. 5, 2023, as Appl. No. 18/296,007.
Application 18/296,007 is a continuation of application No. 17/625,613, abandoned, previously published as PCT/EP2020/069912, filed on Jul. 14, 2020.
Claims priority of application No. 19186304 (EP), filed on Jul. 15, 2019.
Prior Publication US 2023/0246509 A1, Aug. 3, 2023
Int. Cl. H02K 5/00 (2006.01); H02K 7/00 (2006.01); H02K 7/14 (2006.01)
CPC H02K 5/00 (2013.01) [H02K 7/003 (2013.01); H02K 7/14 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An actuated machine comprising:
a main frame;
a machine shaft mounted on the main frame by means of a bearing module;
a gearless torque motor coupled to the machine shaft for driving a rotation of the machine shaft;
a torque arm coupled to the gearless torque motor; and
a catching structure,
wherein the gearless torque motor is coupled to the machine shaft such that the gearless torque motor is capable of following a translational movement of the machine shaft and such that the machine shaft carries at least 50% of the gearless torque motor's weight,
wherein the torque arm is coupled to the gearless torque motor for inhibiting a rotational motion of the gearless torque motor, relative to the main frame, about a central axis of the gearless torque motor,
wherein the catching structure is arranged directly underneath the gearless torque motor and is arranged and configured to catch and hold the gearless torque motor in case of a failure causing the gearless torque motor's weight to be no longer carried by the machine shaft, and
wherein the catching structure is separated from the gearless torque motor by an air gap, whereby the weight of the catching structure is not supported by the gearless torque motor.