Drive and method for operating a drive
AssigneeSew-Eurodrive GmbH & Co. KG
InventorLech Banasik
Life of this patent
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Abstract
A drive includes an electric motor and a first gearbox that can be driven by the electric motor. An output shaft of the first gearbox is connected rotation-fast to a first shaft by a coupling, e.g., a rigid shaft coupling, and the first shaft is mounted by an axial bearing, e.g., a single axial bearing, that can be subjected to a force by at least one controllable first linear actuator.
Claims23
A drive, comprising:
- a first gearbox;
- and
- an electric motor adapted to drive the first gearbox, the first gearbox including an output shaft of the first gearbox connected rotatably-fixed to a first shaft by a coupling, the first shaft being mounted by an axial bearing adapted to be subjected to a force by at least one controllable first linear actuator;
- wherein the axial bearing is adapted to be subjected to a force by at least one controllable second linear actuator;
- wherein the first linear actuator is adapted to be controlled by a control device with a time-variable first control signal, and/or a periodically variable first control signal, the second linear actuator is adapted to be controlled by the control device with a time-variable second control signal and/or a periodically variable second control signal;
- and
- wherein the first and second control signals have a same frequency and have a 90° phase offset relative to one another.
A method for operating a drive that includes a first gearbox and an electric motor adapted to drive the first gearbox, the first gearbox including an output shaft of the first gearbox connected rotatably-fixed to a first shaft by a coupling, the first shaft being mounted by an axial bearing adapted to be subjected to a force by at least one controllable first linear actuator, the axial bearing adapted to be subjected to a further force by at least one controllable second linear actuator, comprising:
- controlling the first linear actuator by a control device with a time-variable first control signal and/or a periodically variable first control signal;
- and
- controlling the second linear actuator by the control device with a second time-variable second control signal and/or a periodically variable second control signal;
- wherein the first and second control signals have a same frequency;
- and
- wherein the first control signal has a phase offset and/or a 90° phase offset relative to the second control signal and/or a rotational speed of the output shaft equals the frequency.
A method for operating a drive that includes a first gearbox and an electric motor adapted to drive the first gearbox, the first gearbox including an output shaft of the first gearbox connected rotatably-fixed to a first shaft by a coupling, the first shaft being mounted by an axial bearing adapted to be subjected to a force by at least one controllable first linear actuator, the axial bearing adapted to be subjected to a further force by at least one controllable second linear actuator, comprising:
- controlling the first linear actuator by a control device with a time-variable first control signal and/or a periodically variable first control signal;
- and
- controlling the second linear actuator by the control device with a second time-variable second control signal and/or a periodically variable second control signal;
- wherein the first and second control signals have a same frequency, a rotational speed of the output shaft differs from the frequency;
- and
- wherein the first control signal has a phase offset and/or a 90° phase offset relative to the second control signal.
Dependencies are inferred from the claim text.