Linear electromechanical actuator
AssigneeJoint stock company Diakont
InventorsMikhail Evgenievich Fedosovsky, Vadim Igorevich Dunaev, Evgeny Valerievich Mysov
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Abstract
The present invention relates to an electromechanical actuator comprising a housing, an electric motor, a roller drive and a rotor rotation angle sensing unit received in said housing. The rotor of the electromechanical actuator is mounted within the housing and configured to rotate in bearing supports. Openings for supplying and removing lubricant are arranged in the housing in the vicinity of the bearing supports, the opening allowing to replace lubricant without disassembling the actuator, thus simplifying maintenance and operation.
Claims8
A linear electromechanical actuator comprising:
- a housing,
- an electric motor comprising a stator fixed to an inner surface of the housing, and a rotor, the rotor being rotatably mounted within the housing on at least one bearing support;
- a roller drive comprising
- an internally threaded cylinder having an inner space,
- an output shaft comprising a threaded portion and slidably mounted within said cylinder, and
- threaded rollers mounted within said cylinder to engage between the inner thread of the cylinder and the threaded portion of the output shaft, wherein
- the rotor of the electric motor is formed by fixing magnets to the outer surface of the roller drive cylinder, and
- wherein the housing is provided with
- at least one closeable opening for supplying lubricant into the internal space of said internally threaded cylinder and to said at least one bearing support, and
- at least one closeable opening for draining the lubricant from said at least one bearing support and from the internal space of said internally threaded cylinder,
- and threaded sealing plugs configured to be mounted in said closeable openings in order to close them.
A linear electromechanical actuator comprising:
- a housing,
- an electric motor comprising a stator fixed to an inner surface of the housing, and a rotor, the rotor being rotatably mounted within the housing on first bearing support and second bearing support;
- a roller drive comprising
- an internally threaded cylinder having an inner space,
- an output shaft comprising a threaded portion and slidably mounted within said cylinder, and
- threaded rollers mounted within said cylinder to engage between the inner thread of the cylinder and the threaded portion of the output shaft, wherein
- the rotor of the electric motor is formed by fixing magnets to the outer surface of the roller drive cylinder,
- wherein the actuator housing is provided with
- a closeable opening for supplying lubricant into the internal space of said threaded cylinder,
- a closable opening for supplying lubricant to said second bearing support, and
- a closeable opening for draining the lubricant from said second bearing supports and from the internal space of said threaded cylinder,
- wherein said first bearing support comprises a sealed radial bearing,
- wherein an enclosure of the housing receiving the electric motor is sealed by a lip seal mounted on the internally threaded cylinder and by a sealing ring mounted on the sealed radial bearing, and
- the actuator further comprising a rotor rotation angle sensing unit mounted within the housing and comprising a shaft of the sensing unit, the shaft being hollow cylindrical shaft and having at least one through radial channel, wherein the at least one through radial channel is adapted to communicate with the closeable opening for supplying lubricant into the internal space of said threaded cylinder and to said first bearing support.
Dependencies are inferred from the claim text.