Abstract: A steering system includes a steering rod mounted for longitudinal axial sliding in a housing and a steering motor acting on the steering rod via a ball screw drive, for which the steering rod forms a ball recirculation screw thread, which interacts with a transmission nut that can be driven by the steering motor. A transmission wheel of a flexible transmission, by means of which driving power of the steering motor is transmitted to the transmission nut, is untiltably connected to an inner ring of a rotary bearing. The transmission nut is pivotably mounted on the transmission wheel about an arbitrary pivot axis, which is oriented perpendicularly to the longitudinal axis of the steering rod. The transmission nut, which is pivoted as a result of a flexural load on the steering rod, can be decoupled from the rotary bearing and from a tensile load on the transmission wheel.

Abstract: A fifth ball bearing that rotatably supports a rotating shaft is provided on one side of a pinion gear in an axial direction of the rotating shaft. A sixth ball bearing that rotatably supports the rotating shaft is provided on the other side of the pinion gear in the axial direction of the rotating shaft. A carrier is provided with a bearing fixing portion that supports the fifth ball bearing immovably in the axial direction of the rotating shaft, and a bearing guide portion that supports the sixth ball bearing movably in the axial direction of the rotating shaft. The fifth and sixth ball bearings are provided so as not to be close to each other in the axial direction of the rotating shaft, and a female screw portion has a rattling adjustment member that presses the sixth ball bearing toward the side where the fifth ball bearing is provided.

Abstract: An actuator includes a drive body including a torque-transfer surface configured to receive a torque. The actuator further includes: a drivable body including an output shaft such that rotation of the drive body causes movement of the output shaft; a first bearing configured to transfer thrust forces from the output shaft in a first direction; and a second bearing configured to transfer thrust forces from the output shaft in a second direction. At least the first bearing extends in a radial dimension beyond the torque-transfer surface.

Abstract: A ball screw device has: a screw shaft rotationally moving during use, a nut having a protruding non-rotating side engaging portion at an end portion on one side in an axial direction, the nut linearly moving during use, balls arranged between a shaft-side and nut-side grooves, and a driving member fixed to the screw shaft having an arc-shaped rotating-side engaging groove portion into which the non-rotating side engaging portion can be inserted in the axial direction, and which can be engaged with the non-rotating side engaging portion in a circumferential direction.

Abstract: A linear actuator of the present disclosure includes a ball screw device, a piston, and a rotation stopper. A screw shaft includes a screw shaft body, a male spline portion, and a step surface. A nut includes a first end surface, a first opening portion, and a first stopper. The piston includes a piston body, a cylindrical portion having a cylindrical shape, protruding in a second direction from a central portion of an opposite surface, and fitted into the male spline portion, and a second stopper protruding in the second direction from the opposite surface. The first stopper and the second stopper abut on each other and form the rotation stopper when the screw shaft is at an initial position. The step surface is arranged in the second direction compared to the first opening portion and is located inside the nut when the screw shaft is at the initial position.

Abstract: A scissor lift includes a base, a platform configured to support a load, a lift assembly having a first end coupled to the base and a second end coupled to the platform, and a linear actuator coupled to the lift assembly and configured to extend to raise the platform relative to the base. The lift assembly includes a series of support members that are pivotally coupled to one another. The linear actuator includes a screw, a nut engaging the screw, and an electric motor configured to drive rotation of the screw relative to the nut to control extension of the linear actuator.

Abstract: A brake system for actuating a pair of front wheel brakes and a pair of rear wheel brakes includes a reservoir and a deceleration signal transmitter. First and second power transmission units are configured for selectively providing pressurized hydraulic fluid during a braking event. The first power transmission unit actuates a selected one of the front wheel brakes and a selected one of the rear wheel brakes. The second power transmission unit actuates the other one of the front wheel brakes and the other one of the rear wheel brakes. First and second electronic control units control the first and second power transmission units. A pair of rear brake motors selectively electrically actuate rear wheel brakes. Multiplex control of each of the pairs of front and rear wheel brakes is provided by an arrangement of first and second parallel valves for each wheel brake.

Abstract: The rotor manufacturing method includes the step of fixing a shaft to a rotor core by hydroforming. The shaft has a cylindrical shape in which an inside diameter of a first portion of the shaft to be placed on an inner peripheral surface of a shaft insertion hole is larger than an inside diameter of a second portion of the shaft located on one side in a rotation axis direction relative to the first portion.

Abstract: A wafer support pin lifting device includes a support plate, a slide block and a lifting pole. The support plate is for supporting multiple support pins. The slide block is slidably connected to an inner wall of a cavity so that the slide block slides relative to the cavity. The lifting pole has a first end, a second end and a third end. The first end is connected to the support plate, the second end is pivotally connected to the slide block, and the third end is connected to an actuator. With the pivotal connection between the second end of the lifting pole and the slide block, the lifting pole approaching the high position causes the support plate to be approximately horizontal, and the lifting pole approaching the low position causes the support plate to be tilted.

Abstract: A linear drive comprising an electric motor driving a worm, a worm gear which meshes with the worm and which is connected non-rotatably to a spindle extending along a linear drive longitudinal axis or axis of rotation and which has a rear and a front end. The worm gear has a bearing seat for a rear bearing, with which the worm gear is mounted in a surrounding transmission housing. To simplify the manufacture of such a linear drive the invention proposes that the rear bearing is in the form of a fixed bearing, the spindle comprises a weldable material, a securing disk is arranged on the rear end of the spindle and the securing disk is connected to the spindle in bonded-material relationship.

Abstract: The invention concerns a spindle drive for a closing element (3) of a motor vehicle (4), wherein in a drive train (14) of the spindle drive (1), a drive unit (5) is provided together with a spindle-nut gear (11) located drivingly downstream of the drive unit (5), with geometric spindle axis (A) running in the axial direction (X), in order to generate linear drive movements of a spindle-side drive connection (12a) relative to a nut-side drive connection (12b) between a retracted position and an extended position of the spindle drive (1), wherein in the drive train (14) a nominal break point (17) is provided which separates the drive train (14) at a predetermined axial limit load acting on the spindle drive (1) via the drive connections (12a, 12b), in particular a tensile load in the direction of the extension position. It is proposed that the drive train (14) is separated via the nominal break point (17) between the drive unit (5) and the spindle-nut gear (11).

Abstract: An apparatus for inspecting defects of a secondary battery having a pair of pressing jigs which press an outer surface of an electrode or a pouch accommodating the electrode assembly in directions corresponding to each other and on which a plurality of protrusions protrude from pressing surfaces and a measurement unit measuring one or more of current, a voltage, and resistance of the electrode assembly when the electrode assembly is pressed by the plurality of protrusions of the pair of pressing jigs is provided.

Abstract: The disclosure relates to a drive device (V) for producing a translational motion of a movable tappet (8) by means of an electromagnetic rotating machine. The drive device includes an inner rotor (4) and an outer coaxial stator (5) and has a movement-thread pair integrated coaxially in the stator. The movement-thread pair comprising a lead screw (6), which is coupled to the rotor for conjoint rotation, and a threaded nut (7), which is linearly guided in a stator sleeve (2) in a rotationally fixed manner and is rigidly coupled to the tappet. The rotor is guided for rotation around the stator and a torque being transferred from the rotor to the lead screw by means of a thin-walled flange (10). A rotational fixation (11) of the threaded nut in the cavity of the stator sleeve is provided as a result of interlocking joining of the two.

Abstract: A ball screw device having a screw shaft rotating during use, a nut moving linearly during use, balls, a fitting cylinder fixed to the nut, a housing, and an anti-rotation member, a first member, which is one of the nut and the fitting cylinder, having a retaining concave portion engaging with a radially inner portion of the anti-rotation member and including a closed surface, an insertion hole of the housing having a guide concave groove engaging with a radially outer portion of the anti-rotation member, the radially inner portion held between the closed surface and an axially end surface a second member, which is the other of the nut and the fitting cylinder, the radially outer portion being able to slide in the guide concave groove.

Abstract: A linkage for opening and closing a lid through actuation of an electric motor 12 includes a base bracket 21 extending in a longitudinal direction of a vehicle, and a driving lever 14 having one end pivotally connected to the bracket 21 and the other end connected to the lid. The driving lever is driven via a pinion 22 by a sector gear 31 driven by the electric motor. The sector gear is attached to the bracket 21. The electric motor is fixed to a motor bracket 11 and attached via the motor bracket 11 to the bracket. Loosening a member supporting a lateral end portion of the motor bracket 11 and a bolt 41 fixing the bracket 11 to the bracket 21 allows the pinion and the sector gear to be axially disengaged from each other.

Abstract: A door opening and closing device for vehicles of the present invention includes: a motor drive mechanism; a first housing that accommodates the motor drive mechanism; a spindle drive mechanism connected to the motor drive mechanism; and a second housing that is arranged coaxially with the first housing and relatively moves with respect to the first housing by the spindle drive mechanism. The spindle drive mechanism includes: a spindle connected to the motor drive mechanism; a spindle nut screwed with the spindle; a push rod fixed so as not to rotate relative to the spindle nut and provided with a protrusion on its outer periphery; and a guide tube in which a guide groove guiding the protrusion of the push rod in an axial direction is formed.

Abstract: A spring system that includes an adjustable spring system that is operated by a motor.

Abstract: An electronic release system configured to unlock a hold open rod mechanism or latch mechanism includes an actuator interface configured with an input device and an actuator associated with the hold open rod mechanism or the latch mechanism. The input device configured to be actuated by personnel to initiate operation of an unlocking mechanism associated with the hold open rod mechanism or the latch mechanism. The electronic release system also includes a wiring assembly configured to connect the actuator interface to the actuator. The actuator interface configured to determine actuation of the input device and signal the actuator over the wiring assembly. The actuator being configured to operate the unlocking mechanism associated with the hold open rod mechanism or the latch mechanism.

Abstract: Provided is a power steering apparatus capable of reducing a maximumly generated stress on an output pulley. An output pulley of a power steering apparatus includes a fastening target portion around a screw insertion hole of a hub portion. When a boundary portion between the hub portion and a winding and hanging portion is defined to be a portion where a minor angle, among relative angles formed between a tangential line of an inner surface of the output pulley and a rotational axis of a nut in an axial cross section of the output pulley that passes through the rotational axis of the nut, gradually reduces from a nut-rotational-axis side toward a radially outer side to then reach 45 degrees, the fastening target portion is a region that is located on an inner side in a radial direction with respect to the boundary portion and overlaps a head portion of a screw in a radial direction of the screw.

Abstract: A linear actuator is provided. The linear actuator includes a rotor assembly including a rotor and a lead screw. The lead screw is rotationally coupled to the rotor for rotation therewith. The linear actuator further includes a stator assembly configured to selectively rotate the rotor in a desired direction, and a body assembly having a shaft and a shaft tube. The shaft is keyed to the shaft tube and prevented from rotating with the rotor. The shaft includes an inner bore configured to threadably receive the lead screw therein. Selective rotation is configured to displace the shaft between an extended position and a retracted position.

Abstract: A lifting spindle arrangement is disclosed for a retractable thruster unit of a marine vessel, the lifting spindle having a lower end and an upper end and being supported at its lower end to a lower support structure by a lower support assembly and at its upper end to an upper support structure by an upper support assembly. The lifting spindle is provided at its both ends with a locking member for such a connection to the support structures such that each end of the lifting spindle may freely move in an axial direction away from the opposite end of the lifting spindle.

Abstract: A compact translation stage having a frame, a motor, a carriage, a translation screw and at least one guide is described herein. The carriage is slidably coupled to the guide and engages the screw. The screw is rotatably coupled to the motor. The motor is embedded in an inner volume of the screw and the screw rotates upon actuation of the motor to translate the carriage relative to the frame.

Abstract: A linear actuator comprises a housing, inside which a spindle assembly, a push rod assembly driven by the spindle assembly, a limit switch for limiting stroke of the push rod assembly, and a motor for driving the spindle assembly are mounted. A connecting seat is disposed on the circuit board for centralizing connection terminals. The motor is electrically connected to the connection terminals. The housing is provided with a plug-in window aligned to the connecting seat. An electric plug of the linear actuator passes through the plug-in window and is plugged into the connecting seat. The electric plug and the housing are fastened together via a mounting component.

Abstract: A parking lock for a transmission of a motor vehicle may include a park gear rotatable about an axis of rotation, and an actuation device adjustable into a locking position and an unlocking position radially relative to the axis of rotation. In the unlocking position, rotating of the park gear may be possible, and in the locking position, rotating of the park gear may be prevented by way of positive locking. The actuation device may include a shifting drum and a locking lever, wherein the shifting drum may be rotatable about a guiding axis that is radial relative to the axis of rotation. The locking lever, by way of a guide track formed in the shifting drum, may interact with the guide track so that when the shifting drum is rotated, the locking lever may be guidable by the guide track radially relative to the axis of rotation and parallel to the guiding axis, and thereby the actuation device may be adjustable into the locking position and into the unlocking position.

Abstract: Provided are a lens driving device, a camera device, and an electronic apparatus capable of suppressing an inclination of a guiding shaft. The lens driving device includes: a base including a bottom surface portion; a guiding shaft provided perpendicularly to the bottom surface portion of the base and a lens support guided by the guiding shaft. The base includes a base main body, and a support plate, which is made of a metal, and is provided in the base main body. One end of the guiding shaft is fixed to the support plate.

Abstract: A steering column adjustable by motor for a motor vehicle, including a carrying unit, which is attachable to a vehicle body, and which holds an actuating unit, in which a steering spindle is rotatably mounted, and including an adjustment drive, which is connected to the carrying unit and to the actuating unit, and by means of which the actuating unit is adjustable relative to the carrying unit, wherein the adjustment drive includes a threaded spindle with an axis, said threaded spindle engaging in a spindle nut, a drive unit and a gear wheel that is driveable to rotate about the axis by the drive unit.

Abstract: An adjustable axial gap of the thread rod assembly has a brace, a thread rod rotationally deployed onto the brace, a thread bearing for gripping one end of the thread rod is screwed into the first positioning hole of the brace, and one side of the thread bearing withstands against the thrust washer. The user may rotate the thread rod by applying force passing through the thrust washer onto the thread rod and shifting an axial moving of the thread rod to adjust the axial gap of the thread rod assembly which attains the merits of simple installation and easy application.

Abstract: Disclosed is an actuator of an electronic brake system including: a motor having a stator and a rotor for generating a rotational force by an electrical signal, the rotor having an accommodating space therein; a power conversion unit disposed in the accommodating space, and including a spindle rotated by a rotational force of the rotor and a nut coupled to the spindle to be linearly moved by rotation of the spindle; a piston coupled to move with the nut; and a sleeve coupled to one end of the rotor by a bearing so that the rotor is relatively rotatable and having an inner space communicating with the accommodating space and accommodating the piston so as to be able to move forward and backward.

Abstract: A fault detection sensor-equipped actuator is provided which can easily detect a fault in at least one of a linear guide unit and a ball screw unit, using a shared sensor. In an actuator (10) including a linear guide unit (4) that guides linear movement of a movable body (1) and a ball screw unit (7) that drives the movable body (1) in an axial direction of a screw shaft (6), a sensor (18) configured to detect a fault in the actuator (10) is placed in a housing (11) where a coupling (12) that couples the screw shaft (6) and a motor (14) for rotating the screw shaft (6) is housed.

Abstract: Linear actuators and methods for assembling the same are disclosed. A linear actuator according to the disclosure may include a drive unit having a drive shaft and a spindle mechanism having a spindle, which can be driven by the drive shaft. A bearing unit may be provided, which may be configured to support a connecting shaft connecting the drive shaft to the spindle and has a bearing block matched to the internal cross section of the housing. The bearing unit may have a preloading device for preloading a rotary bearing inserted into the bearing block, and the spindle may be screwed to the connecting shaft via a centering portion and a screw fastening portion.

Abstract: The invention relates to a control unit (1, 12), comprising a control element (4, 15), particularly for a closing drive of a motor vehicle lock. Said control unit comprises a housing (2, 13), a drive unit, and a spindle gear unit having a spindle nut and a spindle (3, 14). Said spindle gear unit can be driven by the drive unit and the control element (4, 15) can be moved by means of the spindle (3, 14), the control element (4, 15) having a means for guiding the control element (4, 15) in the housing (2, 13) so that the control element (4, 15) can be prevented from rotating about an axis of movement.

Abstract: A linear electro-mechanical actuator (1) preferably for water cutting, makes it possible to significantly improve the working conditions of the actuator (1), so as to optimize its load capacity and increase the working life of the actuator (1), and makes it possible to reduce the risk of breakage or damage of the actuator (1) following loss of control of the movement aimed at producing the force applied by the actuator (1).

Abstract: An electric linear actuator is provided. The electric linear actuator may have a cylinder housing, an electric motor disposed inside the cylinder housing, a piston rod at least partially slidably disposed inside the cylinder housing, and a planetary gear arrangement disposed inside the cylinder housing and configured to connect the electric motor to the piston rod. The planetary gear arrangement may have a ring gear integrally connected to the piston rod. The electric motor, the planetary gear arrangement, and the piston rod may be disposed in series along a central axis of the cylinder housing.

Abstract: An improved mechanism for expanding or lifting a device in accordance with various embodiments of the present invention is a coaxial screw gear sleeve mechanism. In various embodiments, coaxial screw gear sleeve mechanisms includes a post with a threaded exterior surface and a corresponding sleeve configured to surround the post, the corresponding sleeve having a threaded interior surface configured to interface with the threaded exterior surface of the post and a geared exterior surface. A drive mechanism can be configured to interface with the geared exterior surface of the sleeve, causing a device utilizing such a mechanism to expand or lift between a collapsed configuration and an expanded configuration.

Abstract: A linear actuator is disclosed having a housing and a plurality of components arranged in the housing. The actuator may include at least one conducting component, a group of mechanical, non-conducting components including components of a spindle mechanism, and at least one bearing arrangement designed to support components of the spindle mechanism in the housing. The at least one conducting component may be separated from the group of mechanical, non-conducting components by at least one seal in such a way that two mutually separate spaces sealed off from one another are formed within the housing.

Abstract: A linear actuator is configured to provide the moving force for adjustable furniture, such as beds, chairs, or tables. The linear actuator includes a drive assembly, rigid arm, and linkage assembly. The rigid arm includes a pusher block with one or more attachment projections where the linkage assembly is attached.

Abstract: A spindle drive for an adjustment element of a motor vehicle is provided. The spindle drive has a drive unit and a spindle-spindle nut transmission arranged downstream of the drive unit in terms of drive for generating linear drive movements. The drive unit has a tubular drive unit housing and therein a drive motor. In some cases an intermediate transmission is arranged downstream of the drive motor in terms of drive. The drive unit and the spindle-spindle nut transmission are arranged one behind the other on the geometrical spindle axis, and a spindle drive housing is provided with a tubular inner housing and a tubular outer housing. The inner housing runs in a telescope-like manner in the outer housing. In some cases the outer housing of the spindle drive housing accommodates the drive unit with the drive unit housing and is connected to the drive unit.

Abstract: The present invention provides a positioning module for a head-up display device, including: a positioning motor which is operated by an operating signal from a control unit; a lead screw which is connected with the positioning motor and rotated by an operation of the positioning motor; a movable link which is in threaded engagement with the lead screw and moved in an axial direction of the lead screw by the rotation of the lead screw; and a connecting member which connects a mirror unit, which is provided to be rotatable about a rotating shaft, with the movable link, and rotates the mirror unit according to the movement of the movable link, in which connection portions between the connecting member and the movable link are in surface contact with each other, thereby improving durability and positioning performance.

Abstract: A linear actuator includes a housing and a cover tube that is supported relative to the housing. A nut engages the cover tube so as to prevent rotation of the nut relative to the cover tube. A lead screw rotatably engages the nut, wherein rotation of the lead screw causes the nut to travel along the lead screw.

Abstract: A linear electro-mechanical actuator, includes a containment structure (2), one or two pushers facing each other (7), a nut (5) rotatable about an axis (X) driven by a driving force, a screw shaft (6) inserted in the nut (5), connected to the pushers and interconnected with the nut (5) via a helical recirculating ball coupling (5a, 6a), and an anti-rotation mechanism (8) acting on the screw shaft (6) to prevent the screw shaft (6) from rotating about the axis (X). The anti-rotation mechanism (8) includes a pair of fixed guide bars (9), coupled in a sliding fashion with the screw shaft (6) and extending along a direction parallel to the axis (X) and spaced from the axis (X).

Abstract: A linear actuator includes a driver (1), a transmission rod assembly (2), a mechanical motion conversion assembly (3) linked between the driver (1) and the transmission rod assembly (2), and a housing (4) covered onto the driver (1), the transmission rod assembly (2), and the mechanical motion conversion assembly (3). The housing (4) includes a lower part (40) and an upper part (41), and the lower part (40) sequentially includes a first containing portion (400) for receiving and installing the driver (1), a second containing portion (401) for receiving and installing the mechanical motion conversion assembly (3), and a third containing portion (402) for receiving and installing the transmission rod assembly (2), and the upper part (41) is covered on top of the first and second containing portions (401, 402), and the first, second and third containing portions (401, 402, 403) are integrally formed as a whole.

Abstract: In the method for producing a spindle drive of an adjustment device of a motor vehicle seat, the adjustment device comprises a spindle and a nut unit. The nut unit comprises a nut made from plastic and a retainer in which the nut is retained. The nut has an internal thread which is in engagement with the spindle and has recesses in its outer jacket. The method comprises the following steps: the tube section is pushed over the nut during assembly, the nut is located within the tube section, the tube section, in the areas in which the recesses of the nut are located, is deformed into the area of the recesses and a portion of material of the tube section is located in the recesses.

Abstract: An electro-mechanical actuator with wide operating range load includes a shaft and a speed summed differential coupled to rotate the shaft. A prime mover is coupled to the speed summed differential and is configured to react to an output torque of the screw shaft. A torsional spring coupled to the speed summed differential by way of a rotary position sensor for detecting the rotation of the screw shaft thereby measuring the output torque of the shaft for control of the prime mover.

Abstract: A rolling resistant heat-treated steel, which has the following elements indicated in mass fractions in relation to the overall weight: 0.5% to 0.6% inclusive carbon, 0.0031% to 0.005% inclusive boron and 3.5 parts or more parts of titanium in relation to 1 part of nitrogen.

Abstract: The invention relates to a device (4) for actuating a control surface (2) of an aircraft, comprising: —a frame intended to be mounted fixed in relation to a structure of an aircraft, —a bell crank part (7) mobile in rotation in relation to the frame around an axis of rotation (X, X?) and adapted in order to be connected to a mechanical unit (1) for displacement of the control surface (2), —a slider (6) intended to be connected to a drive member (5), the slider (6) being mobile in translation in relation to the frame according to a direction of translation, parallel to the axis of rotation (X, X?) of the bell crank part (7), —first connecting means (61) between the slider (6) and the bell crank part (7) in order to convert a displacement in translation of the slider (6) generated by the drive member (5) into a displacement in rotation of the bell crank part (7), in order to actuate the mechanical unit (1) for displacement of the control surface (2), an input part (53, 16) able to be driven in rotation by the m

Abstract: A road vehicle provided with a cooling duct for the cooling of a brake, the cooling duct including an air intake arranged at the inlet of the cooling duct, a shutter, which is mobile, so as to move between a closing position, in which the shutter closes the air intake, and an opening position, in which the shutter leaves the air intake unobstructed, and an electric actuating device, which controls the movement of the shutter and, therefore, moves the shutter between the closing position and the opening position and is mechanically configured to be normally open and, therefore, in the absence of a power supply, to push the shutter towards the opening position.

Abstract: The present invention relates to landing gear (5) having at least one undercarriage (10) comprising a landing gear leg (11) carrying at least one wheel (12). The undercarriage (10) includes a retraction actuator (20) having an electric motor (23), blocking means (30) for blocking the actuator in the retraction position and for enabling the retraction actuator to be positioned in the “landing gear extended” position by gravity, first monitoring means (35) for monitoring the operation of the retraction actuator (20), first control means (65) for controlling the refraction actuator (20), and second control means (75) for controlling the blocking means (30).

Abstract: A swing type power door lock motor includes a housing having mounted therein a drive unit, which includes a motor, a transmission unit, which includes a screw shaft connected to the motor and a transmission seat threaded onto the screw shaft, and a swing unit, which includes a sector gear meshed with the transmission seat and a swing arm connected to the sector gear. When the motor is started, the screw shaft is driven to move the transmission seat, causing the sector gear to bias the swing arm between a locking position and an unlocking position.

Abstract: At least a rotor fixing portion and a bearing fitting portion are combined to form a hollow rotary shaft. The rotor of a rotary motor portion is fixed on the rotor fixing portion. A thrust radial bearing is fitted on the outer periphery of the bearing fitting portion and a screw nut is fitted to the bearing fitting portion. The rotor fixing portion and the bearing fitting portion are coupled with screw member(s) which are inserted into the hollow rotary shaft from one axial end of the hollow rotary shaft and axially extend inside the bearing fitting portion and the rotor fixing portion. A flange portion of the screw nut is fixed on an abutment portion of the bearing fitting portion in abutment with an end surface of an inner race of the thrust radial bearing that is located on the one axial end side.

Abstract: An electromechanical actuator (EMA) is disclosed. The EMA may comprise an EMA housing having a distal stop that extends radially inward towards a longitudinal axis of the EMA housing, a hail nut extending axially within the EMA housing, and/or a ball screw extending axially within the ball nut, The ball nut may translate axially in a distal direction in response to a rotation by the ball screw, and/or the ball nut may be halted in the axially distal translation in response to contact with the distal stop. The distal stop may be coupled to the EMA. housing. The distal stop may comprise a continuous annular structure. The EMA may further comprise a seal located radially inward of a portion of the distal stop, which may be in contact with said portion and the ball nut and adapted to prevent debris from entering the EMA.