302 results about "Electromechanical actuator" patented technology

An electromechanical actuator comprises a casing, an electric motor, a gearbox, a spring-applied brake (25), and a centring shaft (71). The brake (25) comprises a coil spring (48), a drum (49), an input member (50) and an output member (51). The output member (51) comprises a first bore (73). The shaft (71) is mounted inside the first bore (73) of the output member (51) and a bore of a sun gear (40) of a reduction stage (38) of the gearbox. The drum (49) comprises a shoulder (90). Furthermore, a planet carrier (66) of the reduction stage (38) is configured to bear against the shoulder (90) of the drum (49).

The invention discloses a fault intelligent identification method for an electromechanical actuator, and the method comprises the following steps: carrying out the normalization of fault simulation data of the electromechanical actuator, carrying out the slicing processing through a sliding window, and dividing the data into a training data set and a test data set according to a proportion; then, the training data set serves as input of a multi-scale liquid attention convolutional network model, the training data set is subjected to space fault feature extraction through multi-scale convolution, then time sequence fault features are added through a liquid time sequence processing module, meanwhile, a time attention mechanism is introduced to highlight important time steps, and finally, a classification output layer is used for classifying the time sequence fault features. A trained fault intelligent identification model is obtained; and finally, testing the trained fault intelligent identification model by using the test data set to obtain an electromechanical actuator fault intelligent identification result. In addition, the method is simple and easy to implement and suitable for fault feature extraction and recognition of the electromechanical actuator, and recognition accuracy and stability are remarkably improved.

An electromechanical actuator comprises a casing, an electric motor, a gearbox, a spring-applied brake (25) and a centring shaft (71). The brake (25) comprises a coil spring (48), a drum (49), an input member (50), an output member (51) and a bushing (76). The input member (50) comprises a first bore (72). The output member (51) comprises a first bore (73) and a second bore (74). The shaft (71) is mounted inside the first bore (73) of the output member (51) and a bore of a sun gear of a reduction stage of the gearbox. The bushing (76) comprises a bore (77), inside which the shaft (71) is mounted. The bushing (76) is mounted inside the first bore (72) of the input member (50) with an interference fit and inside the second bore (74) of the output member (51) with a loose fit.

An emergency autoland braking system for aircraft includes an electromechanical actuator configured to provide a braking force to rudder pedals for actuating a braking system without altering the existing braking system of the aircraft. An equalized braking force may be applied to both rudder pedals via a force balancing mechanism and a single linear actuator, or differential braking force may be applied via independent linear actuators. The system is compatible with both open and closed loop control for commanding a braking force.

An electromechanical actuator including an electric motor housed in a housing, the electric motor acting on a torque output element capable of being coupled to an element of a transmission gearbox of a motor vehicle. The torque output element is connected to the electric motor by drive means, and the torque output element is a main shaft configured to rotate about its axis of rotation with a first end and a second end. The actuator further includes a circuit board located in the housing, the circuit board comprises a sensor which faces a magnet mounted on a support coupled to the second end of the main shaft by means of a first swivel-linear mechanism.

An electro-mechanical actuator for a valve can have a collar configured to envelope a portion of a commercially available liquid coupler. The collar can engage a region of the liquid coupler and a bias member can urge the collar to displace a movable member of the liquid coupler and thereby to break a coupling. A dowel can retain the collar against the force applied by the bias member and a tension member can, under threshold tension, retract the dowel, releasing the collar to move under influence of the bias member. Other valves have a gate element coupled with an armature to rotate the gate element under an electromagnetic field. The gate element can define a recess and a retainer can reside in the recess. As the gate element rotates, the retainer can align with a longitudinal segment of the recess and allow the gate element to displace longitudinally.

An electromechanical actuator architecture is provided for a cowl door of an aircraft engine nacelle. The electromechanical actuator architecture includes a first clutch, a no-back unit including a friction clutch and a one-way clutch and a ball screw with two coaxial external cylinders. Torque generated for actuator extension is transferable to the ball screw and the coaxial external cylinder via the first clutch. During actuator retraction, cowl door weight and an aerodynamic load compress the coaxial external cylinder and the ball screw with loads that are transferred to the no-back unit, which is configured to maintain actuator position in an event generation of the torque ceases.

A latch assembly (10a; 10b) comprising a base structure 10b(12 ); an elongated latch slider (14a; 14b) including a slider feature (62a; 62b) and being slidable between a free position (18) and a latching position (40); and a lock device (26) including an electromechanical actuator 22(72 ) and a lock element (74a; 74b) movable by the actuator between an unlocked position (92), and a locked position (96) for engaging the slider feature to prevent movement of the latch slider from the latching position to the free position; wherein the lock device further comprises a drive feature (76) driven by the actuator; wherein the lock element comprises a driven feature (86) arranged to be contacted and driven by the drive feature; and wherein a base clearance (98) between the lock element and the base structure is smaller than a drive clearance (104) between the drive feature and the driven feature.

The utility model relates to the technical field of electromechanical actuators, and one embodiment of the utility model provides an electromechanical actuator which comprises two supporting seats, supporting grooves are formed in the supporting seats, a U-shaped supporting frame is arranged on one sides of the two supporting seats, and the two ends of the supporting frame extend into the supporting grooves and are in sliding connection with the side walls of the supporting grooves. The device further comprises an electric push rod, an actuator body, supporting through holes and a clamping mechanism, the electric push rod is fixedly arranged between the groove bottom of the supporting groove and the supporting frame, the actuator body is arranged on one side of the supporting frame, the supporting through holes are formed in the positions, located on the two sides of the actuator body, of the supporting frame, and the clamping mechanism is arranged on the supporting frame. According to the technical scheme, the electromechanical actuator height adjusting device solves the technical problem that in the prior art, height adjustment of electromechanical actuators of different specifications is inconvenient.

Method for controlling the operation of an electromechanical actuator, associated electromechanical actuator and occultation device comprising such an actuator The invention relates to a method for controlling the operation of an electromechanical actuator comprising an electric motor controlled in response to a command (Cmd) by a motor voltage (V_mot), as a function of a bus voltage value (Vbus).The method comprises the following steps: monitoring (E10) the amplitude of a current (Imot) flowing through the motor; determining (E20) a maximum permissible motor voltage threshold value (Vmot_max) for the motor as a function of the amplitude of the current (Imot) flowing through it and a predetermined maximum power threshold value (Pmax); limiting (E40) the motor voltage value to the maximum motor voltage threshold value if the motor voltage value reaches or exceeds the maximum motor voltage threshold value (Vmot_max) and maintaining the motor voltage value at the corrected motor voltage value (Vmot_cor) if the motor voltage value is lower than the maximum motor voltage threshold value. Figure for abstract: Fig 4.

A method includes applying a high frequency signal to an electromechanical actuator and measuring a first response of the electromechanical actuator to the high frequency signal, estimating an electrical parameter of the electromechanical actuator based on the first response, applying a low frequency broadband signal to the electromechanical actuator and measuring a second response of the electromechanical actuator to the low frequency broadband signal, and estimating a mechanical parameter of the electromechanical actuator based on the second response and the estimated electrical parameter.

This disclosure describes techniques for a self-aligning system within a belt-driven linear actuator that enables a “keyless” or “round profile” piston to be sealed while maintaining an aligning and / or torque resisting ability. This enables the airspaces within the electromechanical actuator could be pressurized to perform a secondary load holding function that is redundant to the linear screw device.

The present invention relates to a valve body (100) for an electromechanical actuator in a vehicle, comprising a gas conduit (102) extending through the valve body (100) along an X axis, a liquid or fluid conduit (120) extending through the valve body (100) along a Y axis, the liquid or fluid conduit (120) having two ends (108a, 108b), a first external conduit (124a) connected to the first end (108a) of the liquid or fluid conduit (120) and a second external conduit (124b) connected to the second end (108b) of the liquid or fluid conduit (120), at least one of the two ends (108a, 108b) of the liquid or fluid conduit (120) comprising a reinforcing element (122), the reinforcing element (122) being a plurality of reinforcing ribs formed near of at least one of the two ends (108a, 108b) of the conduit for liquid or fluid (120).The present invention also relates to an electromechanical actuator comprising such a valve body (100). Figure for the abstract: Figure 1.

Disclosed is an electromechanical actuator comprising an electric motor, a coupling element and a monostable clutch (23a). The clutch (23a) comprises a central shaft (43), a mobile member (44) and a coil (45), which generates a magnetic field when this coil is powered, so as to cause the member (44) to move relative to the shaft (43). The shaft (43) comprises a core (46), a ring gear (47) and a ring (52), arranged between the core (46) and the ring gear (47). The core (46) and the ring gear (47) are in contact with the member (44) only in a second position, so as to rotate the shaft (43) as a result of grip. Furthermore, the supply to the coil (45) is implemented continuously, only while the member (44) is moving between a first position and the second position, and while the member (44) is being held in the second position.

Disclosed is an electromechanical actuator (11) comprising an electric motor, a first coupling element, a second coupling element, a first clutch (23a), a second clutch (23b) and a housing (49) common to the clutches (23a, 23b). The first clutch (23a) is engaged or disengaged, so as to secure or disengage, at least in terms of rotation, the first coupling element (20a) with respect to the motor (16). The second clutch (23b) is engaged or disengaged so as to secure or disengage, at least in terms of rotation, the second coupling element (20b) with respect to the motor (16). The housing (49) comprises a first part (41) and a second part (55). The first part (41) comprises a first barrel and a second barrel. The first clutch (23a) is mounted in the first barrel. The second clutch (23b) is mounted in the second barrel. Further, the second part (55) is fixed on the first part (41).

The invention relates to an electromechanical actuator (1) comprising an electric motor (2) acting on a torque output element (6) coupleable to a movable member of a vehicle gearbox, the torque output element (6) being configured to rotate about its axis of rotation between a first limit position and a second limit position defining an actuation range, the invention relates to an actuator (1) comprising a torque output element (6) connected to an electric motor (2) by means of a drive (4, 5) comprising a first gear (4) and a second gear (5), the actuator (1) further comprising an electronic board (10). The electronic board (10) comprises a sensor (12) facing a magnet (15) mounted on a third gear (11) which meshes with the second gear (5) such that the third gear (11) performs at most only a single revolution when the torque output element (6) performs n revolutions corresponding to the actuation range.

The invention relates to a method for controlling an electromechanical actuator for a shielding device and an electromechanical actuator for a shielding device. The invention relates to a method for controlling an electromechanical actuator comprising an electronic control unit (15) and a battery (18), the electronic control unit comprising a controller (31) connected to a charger (44) and a charging circuit (32) of the battery (18), the method comprising: detecting a connection of the charger to the electromechanical actuator; when a connection is detected, determining a power profile having an amperage threshold; the charger is controlled to supply the power profile to the charging circuit. The method further comprises a first control step for charging the battery with a charging current of an amperage equal to the first amperage and a second control step for charging the battery with a charging current of an amperage equal to a second amperage strictly greater than the first amperage and less than or equal to an amperage threshold.

A method is for testing a functionality of a system of a wind turbine. The system includes an electro-mechanical actuator, an energy storage unit, and an energy dissipating element connectable to the energy storage unit for selectively transferring energy from the energy storage unit to the energy dissipating element. The method includes: providing first information representative of an operating mode of the system, and, if the operating mode is a test mode: causing a discharging of energy from the energy storage unit and a supply of at least a portion of the discharged energy to the energy dissipating element; receiving measurements being representative of a state of at least one of the energy storage unit and the energy dissipating element during the discharging and the supply; and determining a functionality of at least one of the energy storage unit and the energy dissipating element based on the measurements.

The invention discloses a transmission gap detection and adjustment device for an electromechanical actuator. The transmission gap detection and adjustment device comprises a gap output measurement module, an electromechanical actuator limiting quick release module and an angle input calibration module, wherein the bottom of the electromechanical actuator limiting quick-release module is connected with a sliding rail at the bottom end of the gap output measurement module; the angle input calibration module is connected with an internal mechanical transmission input shaft of the electromechanical actuator; and the electromechanical actuator is arranged on the electromechanical actuator limiting quick release module. The problems that in the prior art, transmission gap measurement of an internal mechanical structure of an electromechanical actuator is not accurate enough, a detection device is complex in structure and difficult to maintain, and the quality requirement for the size of a transmission chain gap in the assembly process of the electromechanical actuator cannot be met are solved.

A device formed by a spindle is connected to a nut and to one or more servo motors where the transmitted torque will be the sum of the separate torques of the servo motors. The device has a set of two or more rods arranged around the spindle. The spindle is supported in two bearing housings that restrict axial movement in both directions, including an anti-reverse system that only allows a drive shaft to rotate, all inside an inner sleeve. An outer sleeve moves along the outside of the inner sleeve under a fixed metal structure for securing to a machine, keeping all particle entry units closed. Four screwed elements allow the spindle to be put into a parked position to facilitating replacement of wear units.

Linear electromechanical actuator (1), comprising a containment structure (2); a pusher (3); a mechanical reduction apparatus (4); drive means (5) operatively connected to said mechanical reduction apparatus (4) to rotate it about said rotation axis (X); a shaft (6) connected to said mechanical reduction apparatus (4) such that a rotation of said mechanical reduction apparatus (4) determines a translation of the shaft (6) along said rotation axis (X); an active anti-rotation mechanism; the mechanical reduction apparatus (4) comprises a nut (8) and a longitudinal pushing element independent of each other and rotatable about said rotation axis (X) under the action of said drive means (5); said longitudinal pushing element (9) being fitted into said nut (8); coupling means (10, 11, 15, 16) configured to mechanically couple said nut (8) and said longitudinal pushing element (9) with said shaft (6), such that a rotation of said nut (8) and / or of said longitudinal pushing element (9) determines a translation of said shaft (6) along said rotation axis (X); said coupling means (10, 11, 15) comprising: an intermediate coupling stage (10) interposed between the nut (8) and the longitudinal pushing element (9), said shaft (6) being at least partially fitted into said intermediate coupling stage and into said longitudinal pushing element (9).

A ball screw drive, in particular for an actuator of a hydraulic brake system, includes two spindle drive elements, namely a threaded spindle and a spindle nut which can be rotated relative to the threaded spindle. One of the spindle drive elements is provided as a rotatable drive element, and the second spindle drive element is provided as an output element which can be moved in a secured manner against rotation. The ball screw drive additionally includes a damping element that is configured as an annular element concentric relative to a central axis of the threaded spindle. The annular element is rigidly connected to one of the two spindle drive elements, and can be simultaneously rotated and moved relative to the other spindle drive element in a play-free manner.

A system for providing cooling air within a hybrid electric gas turbine engine includes at least one cooling air tube configured to provide high pressure turbine cooling air from a first location to a second location within the hybrid electric gas turbine engine. At least one throttling valve each located on the at least one cooling air tube configured to limit a flow of the high pressure turbine cooling air from the first location to the second location. At least one electromechanical actuator each associated with the at least one throttling valve configured to actuate the throttling valve to a first flow level when the hybrid electric gas turbine engine is in a first condition and to a second flow level when the hybrid electric gas turbine engine is in a second condition responsive to control signals from an external source.

An electromechanical actuator assembly (1) for actuating a brake actuator (20), comprising: an actuating mechanism (3, 6) configured to be able to convert a rotational driving movement into a translational driven movement in the direction of a first longitudinal axis (L1); and a pushing member (4, 4 ', 4' ') operably coupled to the actuating mechanism (3, 6) to receive and transmit the translational driven motion at least in the direction of the first longitudinal axis (L1), where the actuating mechanism (3, 6) is a spindle-spindle nut mechanism, the spindle nut (6) of the actuating mechanism (3, 6) is rotatably supported about the first longitudinal axis (L1) while being axially fixed, and the pushing member (4, 4', 4 '') is rotatably supported about the second longitudinal axis (L1) while being axially fixed. And the main shaft (3) of the actuating mechanism (3, 6) is configured to be axially movable relative to the first longitudinal axis (L1) while being fixedly rotated.

Connection adapter (2) with an electromechanical actuator (1) in operative connection with a pilot valve or a valve (18) for pressure change, wherein the electromechanical actuator (1) has an axis (14) whose rotational movement is directed towards a translational position change of a pressure piece (19) with a spring preload, characterized in that the connection adapter (2) has an upper connection surface (5) for connection with different electromechanical actuators (1), wherein a lower parallel connection surface (6) is formed at a distance from the connection surface (5) by a spacer body (11), within the spacer body (11) a closed guide dome (12) is formed, into which the axis (14) of the electromechanical actuator (1) dips and is axially guided by the pressure piece (19) and is in operative connection with it, wherein the axis (14) has at least one surface on its circumference,which engages in a corresponding recess of the pressure piece (19), wherein the pressure piece (19) has an external thread which interacts with an internal threaded bore (8) located within the guide dome (12) to change the relative position of the pressure piece (19).

An electromechanical actuator and a shielding device comprising such an electromechanical actuator. An actuator (11) comprises a housing, a motor (16), a control unit (15), and an electromagnetic wave filtering module (22). The filtering module (22) comprises a first inductor (41) extending along a direction defined by a first longitudinal axis (L1), a second inductor (42) extending along a direction defined by a second longitudinal axis (L2), and a support (48) on which the inductors (41, 42) are mounted. The first and second axes (L1, L2) extend respectively in a first plane and a second plane, parallel to an axis of rotation (X) of the actuator (11). In the first plane, the first axis (L1) is inclined with respect to the axis of rotation (X) by a first non-zero inclination value (α1).Furthermore, in the second plane, the second axis (L2) is inclined relative to the axis of rotation (X) by a second non-zero inclination value (α2). See Figure 6 for abbreviations.

The invention belongs to the technical field of electromechanical actuators, and provides a dual-mode electromechanical actuator based on a planetary roller lead screw pair. The actuator comprises a planetary roller lead screw pair and a reverse planetary roller lead screw pair which share one redundant lead screw, and a main transmission chain and a standby transmission chain which are physically isolated are formed by the planetary roller lead screw pair and the reverse planetary roller lead screw pair respectively. The main transmission chain drives the redundant lead screw to rotate through the main motor, so that the driving nut is linearly output; the standby transmission chain drives the transmission nut to rotate through the standby motor, so that the redundant lead screw moves axially, and then the driving nut is driven to output. Through cooperative monitoring of the displacement sensor and the encoder, the system can be automatically switched to the standby chain in an undisturbed mode when the main chain breaks down, and the continuous output speed is kept. The single-point fault risk of a traditional actuator is thoroughly eliminated, high-reliability and high-safety redundant drive is achieved, and the method is particularly suitable for the high-requirement field such as aerospace.

A system includes a controller having one or more processors. The system also includes a memory, and instructions stored on the memory, and executable by the one or more processors to output a control signal that causes an actuation of a valve to move a test distance via an electromechanical actuator; receive electrical property data corresponding to the actuation over the test distance by the electromechanical actuator; evaluate a condition of the valve based on the electrical property data; and generate an output based on the condition of the valve.

The utility model discloses an electromechanical actuator for a drum brake and a drum brake system. An electromechanical actuator for a drum brake includes a power mechanism having an output shaft capable of forward and reverse rotation; the main braking mechanism comprises a rotating transmission part, the rotating transmission part and the output shaft are parallel to each other and arranged at an interval, and the rotating transmission part is provided with a first end and a second end opposite to each other; the transmission mechanism is connected between the output shaft and the rotary transmission part, the output shaft can drive the rotary transmission part to move in the direction from the second end to the first end when rotating forwards, and the output shaft can drive the rotary transmission part to move in the direction from the first end to the second end when rotating backwards. According to the electronic mechanical actuator for the drum brake and the drum brake system, the structure is simple, the number of parts is small, the occupied space is small during assembly, maintenance and replacement are convenient, and meanwhile energy consumption is low in the braking process.