Abstract: A drive mechanism include a movable element which has at least one bearing arm; a linear guide shaft for linearly guiding the movable element without rotating; a driving device driving the movable element linearly along the linear guide shaft; a driven member driven, by the driving device, in a direction parallel to the linear guide shaft; a first guide hole formed on the bearing arm; a second guide hole formed on the driven member, the first and second guide holes being identical in size and in cross sectional shape; a tubular bearing member fitted into the first and second guide holes, the linear guide shaft being fitted completely through the tubular bearing member to be freely slidable therein; and a retaining device formed on the tubular bearing member and the driven member to prevent the tubular bearing member from moving relative to the driven member.

Abstract: A device (1) is described for controlling and/or regulating a hydraulically activatable shifting element. The shifting element (2) is configured with a piston-cylinder unit (3) that can be acted upon by a hydraulic operating pressure (p) and can be arranged in an installation space that is connected to an oil sump of the gearing mechanism device. In addition, the device (1) is provided with an electric motor (5) that can be actuated by a control and/or regulator unit (4), and which is provided with a drive-transformer device (6) that has a functional connection to the electric motor (5), by way of which the rotational drive of the electric motor (5) can be transformed into the hydraulic operating pressure (p) for the shifting element (2).

Abstract: An actuator comprises a screw shaft, a nut translatable along the screw shaft upon relative rotation occurring therebetween, and articulated connection means securing an output member to the nut, the output member being of elongate form and extending substantially parallel to or coaxial with the screw shaft when the actuator is in a retracted position.

Abstract: An electromechanical linear-motion actuator which is short in axial length.

Abstract: A drive mechanism for dehydrating a mop. The drive mechanism includes a base (10); a driven gear (12) rotatably mounted on the base; a propeller shaft (121) having a lower end rotated by the driven gear and an upper end to rotate a rotation barrel (21); a driving gear (11) meshing with the driven gear; a spinning shaft (111) to rotate the driving gear; a drive member (13) having a spinning shaft hole (131) meshing with the spinning shaft; an elastic member (14) biased between the drive member and a housing (20) to move the drive member downward relative to the spinning shaft; and a pedal (15) pivotally mounted on the base to move the drive member upward relative to the spinning shaft. The driving gear has a diameter greater than that of the driven gear to drive the driven gear to rotate the rotation barrel easily and quickly.

Abstract: The invention relates to an electrical stressing means having a housing (2) which can be attached to the drive spindle of a machine tool and in which a threaded rod (3) for adjustment of the clamping jaws of a chuck is mounted such that it can be moved axially, and having an electric actuating motor (4), whose rotor is connected for drive purposes to a drive wheel (6). The drive wheel (6) is connected to the shaft generator (7) of a harmonic drive, and the internal gearwheel (8) of the harmonic drive is connected to the housing (2), with the steel bush (9) (flexspline), which has an external tooth system, of the harmonic drive being provided as a drive for the spindle nut associated with the threaded rod (3).

Abstract: A drive device for moving a flap of a vehicle includes a first fastening element which can be connected to one of a moveable component and a fixed component, and a housing tube which is axially movable relative to the first fastening element. The housing tube has an end opposite the first fastening element which carries a second fastening element which can be connected to the other of the moveable component and the fixed component. A spindle drive includes a threaded spindle having end mounted for rotation in the housing tube and fixed against axial movement with respect to the housing tube, and a spindle nut arranged on the threaded spindle. The spindle nut is connected to the first fastening element and secured against rotation with respect to the housing tube, and a rotary drive is arranged to drive the spindle in rotation.

Abstract: In a threaded drive having a load-bearing nut and a catch nut, for securing against a load-bearing nut, the catch nut is urged by a spring against an axial bearing face of the load-bearing nut.

Abstract: In an expansion actuator employing a screw feed mechanism, when a screw feed mechanism (60) formed from a male thread member (58) and a female thread member (59) that are screwed one into the other is driven by a motor (33) via a reduction gear (44), relative displacement between the male thread member (58) and the female thread member (59) in the direction of an axis (L) can be outputted as expansion and contraction due to relative movement of first and second housings (31, 32). Since the screw feed mechanism (60) is disposed so as to surround outer peripheries of the motor (33) and the reduction gear (44), which are disposed on the axis (L), compared with a case in which the motor (33), the reduction gear (44), and the screw feed mechanism (60) are disposed in series on the axis (L), it is possible to make the dimension of the expansion actuator (14) in the axis (L) direction smaller.

Abstract: A cartridge feed screw nut includes a body having a tubular threaded opening defined therein and having side portions. The side portions include a plurality of lateral surfaces and a plurality of end surfaces. The lateral surfaces and the end surfaces form a profile shaped to prevent rotation of the cartridge feed screw nut relative to a front washer cylinder through engagement between at least one of the lateral surfaces or the end surfaces with the front washer cylinder.

Abstract: The feeder device includes a screw attached to one of a fixed member and a movable member relatively movably supported by the fixed member, a support member attached to the other one of the fixed and movable members and including a hole into which the screw is inserted, a nut member disposed inside the support member and including a nut with a female screw with which a male screw provided at the screw engages, the nut member being relatively movable in an axial direction, an elastic case disposed between the nut member and the support member, the elastic member including a hole, axial center of which is the same with the female screw and elastically holding the male screw at an inner peripheral surface and a pressure-contact surface elastically holding the nut member by pressure contact therewith and a drive device for drivingly rotating the screw or the nut.

Abstract: A disc spring is provided between a ball screw nut and a hollow shaft, and another disc spring is provided between rolling bearings and a housing. When leftward motion of a screw shaft is stopped and a rotational inertia force is applied to the ball screw nut, these disc springs allow the ball screw nut to rotate to a certain degree.

Abstract: A device for moving a movable structural component with respect to a stationary structural component includes a first fastening element which can be fastened to the movable structural component, and a housing tube having a second fastening element which can be fastened to the stationary structural component. A spindle drive for moving the first fastening element axially relative to the housing between an extended position and a retracted position includes a spindle nut arranged on a threaded spindle. An electric motor arranged in the housing tube drives one of the spindle nut and the threaded spindle in rotation. A power supply for supplying power to the electric motor includes a power output stage arranged in the housing tube, wherein the power output stage is shielded from electrical and magnetic fields.

Abstract: A lift mechanism positioned on a tank containing potentially explosive gases, corrosive material and/or poisonous material with the motor of the mechanism on top of the lift and more than 5 feet away from any vent or outlet of the tank and one or more devices inside the tank being moved and positioned by the lift mechanism.

Abstract: The ball screw mechanism has spindle nut (1) arranged rotatably on a ball-rolling spindle (2) and between which balls (3) roll on ball grooves (4, 5). A driving wheel (20, 26) is fixed to the spindle nut (1), for driving the spindle nut. (1)The spindle nut (1) is mounted on a housing (8) by a rolling bearing (7). The bearing has an outer ring (9, 23) fixed to the housing (8) the outer ring (9, 23) has a ring (15, 29) surrounding the spindle nut (1), and a bearing running surface (10, 11) formed on the inner circumference of said the ring A radial flange (16, 28), adjoining the ring (15, 29), is fixed to the housing (8).

Abstract: A linear screw actuator including, an outer housing which is fixed in use, an electric motor within the housing, the motor including a hollow rotatable output shaft, a rotatable but axially fixed nut driven by said output shaft, an elongate hollow axially translatable output member, said output member extending within said output shaft of said motor and cooperating with said rotatable nut, and, an elongate anchor member secured against rotation relative to said housing and extending within said output member, said anchor member cooperating with said output member to hold said output member against rotation whereby rotation of said nut relative to said output member causes axial translation of said non-rotatable output member relative to the housing.

Abstract: A stowable table unit system for a motor vehicle comprises a table portion, a support leg portion, and a lifting mechanism. The table portion has a top surface and a bottom surface. The lifting mechanism connects to the table portion and positions the table portion between a stowed position and a deployed position. The support leg moves between a stored position within the bottom surface of the table portion when the table portion is in the stowed position and an extended position when the table portion is in the deployed position.

Abstract: A leadscrew drive has a leadscrew follower, and a leadscrew. The leadscrew is formed as an elongated annular leadscrew shell having a thread-form outer surface. The leadscrew may be fabricated by depositing a leadscrew-shell material, such as nickel, onto a mandrel having a thread-form outer surface, so that the thread-form outer surface of the mandrel is replicated in an outer surface of the leadscrew-shell material. The mandrel may be removed, to leave a hollow leadscrew shell, or left in place.

Abstract: An electromechanical actuating assembly (100), operable in a plurality of fault-tolerant modes to accommodate at least the most probable fault situations. In the M1D1-only mode, actuator-moving power is transferred only through the first drivetrain (400A) and decoupling power transmitted through the second decoupling train (600B) decouples the second drivetrain (400B) from the actuator (200). In the M2D2-only mode, actuator-moving power is transferred only through the second drivetrain (400B) and decoupling power transmitted through the first decoupling train (600A) decouples the first drivetrain (400A) from the actuator (200).

Abstract: A reversible control rod mechanism adapted for selectively and repeatedly rotating a shaft bidirectionally and thereby moving an attached load bidirectionally.

Abstract: An under travel actuator, particularly intended for an automobile clutch, including an engine (12) for the translation movement of a mobile gear (14) acting on a push stem (16) for the opening and closing of the clutch, the mobile gear including screw-nut means (22, 24) cooperating with two combined means of unidirectional driving in order to regulate the length of the push stem (16) according to the wear of the clutch surfaces subject to friction.

Abstract: It is a goal of the proposed invention to provide “encoder-like” performance without incurring the cost and complexity of a closed loop system.

Abstract: Under a state of a normal temperature, a pitch B2 of a feed nut 55, 65 is formed to be slightly larger than a pitch A2 of a feed shaft screw 53, 63. Accordingly, since the screw thread of the feed nut 55, 65 is pressed to the screw thread of the feed screw shaft 53, 63 with a small interference, there is no backlash between the feed screw shaft 53, 63 and the feed nut 55, 65 so that a smooth feeding operation can be carried out. Under a state of a low temperature, the feed nut 55, 65 contracts more than the feed screw shaft 53, 63. As a result, a pitch B1 of the feed nut 55, 65 has the substantially same dimension as that of a pitch A1 of the feed screw shaft 53, 63.

Abstract: The actuator has a shaft having a starting point resistance feature, and a low resistance portion. The actuator has a motor configured to rotate the shaft, the motor outputting a current feedback signal to indicate current exiting the motor. The actuator has a interference portion in proximity to the shaft, the interference portion configured to facilitate a resistance to shaft rotation when the shaft rotates, the resistance to shaft rotation causing a magnitude of the current signal to be greater when the starting point resistance feature passes in front of the interference portion than when the low resistance portion passes in front of the interference portion.

Abstract: A linear actuating element for the remote control of adjustable components on wind tunnel models includes a housing and a gear motor for driving a threaded spindle. On the threaded spindle a threaded nut for moving a pusher rod is arranged. The threaded spindle is connected to the gear motor by a chain drive, wherein the threaded spindle and a gear motor axle are arranged so as to be substantially anti-parallel. Due to the anti-parallel arrangement of the gear motor axle and of the threaded spindle, the linear actuating element on the one hand comprises a compact design. Consequently the linear actuating element is in particular suited to the remote control of adjustable components on wind tunnel models with small spatial dimensions. On the other hand the linear actuating element makes it possible to generate very considerable mechanical actuating forces while at the same time providing very good positioning and repetition accuracy.

Abstract: A linear actuator comprises an outer tube, an intermediate tube and an inner tube which are polygonal in cross section. The outer tube is provided for the insertion of the intermediate tube and the inner tube, and the respective tubes are restricted with respect to one other. The outer tube is disposed with a push device having a screw and a nut that are screwed with each other and at least one tension adjusting device. At a top of a push pole is disposed a pulley pushing and supporting a pulling member whose two ends are respectively fixed between the inner tube and the outer tube, and another pulling member winding around a pulley is disposed between the intermediate tube and the inner tube. Thus, each pulling member can be pulled to change the tension so as to keep the stability.

Abstract: A feeding apparatus includes a screw shaft, a feeding nut, a supporting member, a driving unit, an intermediate member supported by the screw shaft and arranged to be rotatable relative to the supporting member, and an elastic biasing mechanism. The intermediate member includes a radial sliding contact surface slidably contacting a radial bearing surface of the supporting member, first and second thrust sliding contact surfaces contacting first and second thrust bearing surfaces formed at the supporting member, respectively. The elastic biasing mechanism elastically biases the first and second thrust sliding contact surfaces of the intermediate member to contact the first and second thrust bearing surfaces, respectively, and further elastically biases the intermediate member to a thrust receiving member provided at the screw shaft for assembling the intermediate member and the thrust receiving member onto the screw shaft without a clearance between the intermediate member and the thrust receiving member.

Abstract: A ring gear of a planetary reduction gear is screwed into an inner peripheral surface of a first housing through an opening thereof, while the thrust-receiving flange of a screw feed mechanism is held by the locknut screwed into an inner peripheral surface of a second housing through an opening thereof. In addition, the locknut and the ring gear face each other in an axial direction with a slight gap provided therebetween when the openings, respectively, of the first and second housings are connected to each other in the axial direction. Accordingly, even if the threaded connection of any one component of the locknut and the ring gear is loosened, the one component is prevented from moving by the other component.

Abstract: There are provided two kinds of nuts of a ball thread nut 20 and a non-ball thread nut 30 which is rotatable in synchronization with the ball thread nut 20 and in which a thread groove in rectangular or trapezoidal shape in section is formed. In a thread rod 10, two kinds of thread grooves are formed at the same pitch, one 11 of the thread grooves being in an arc shape in section so as to be meshed with the ball thread nut 20 through balls B and the other thread groove 12 being in a rectangular or trapezoidal shape in section so as to be meshed with the non-ball thread nut 30. When load is less than a predetermined value, the thread ridge of the non-ball thread nut 20 and the thread ridge 13 of the thread rod 10 are separated and are out of contact with each other so that the thread rod 10 is moved in the axial direction thereof by only the ball thread nut 20.

Abstract: A kit is described that modifies a standard screw jack for a trailer hitch, by introducing a safety lock mechanism. The modified screw jack will be inoperative until the safety lock mechanism is opened. In the inoperative position, the screw jack cannot be turned to lift or lower the trailer hitch. The crank for turning the screw jack will be freewheeling or frozen. Turning a key in a lock keyway will release the safety lock mechanism, thus putting the crank into rotational engagement with the screw jack.

Abstract: An inexpensive and high efficiency power transmission method and device with a simple structure for converting a rotational motion into a linear motion in accordance with a load is provided. A feed screw (21) and a female screw (22) having a larger diameter than the feed screw are engaged in an eccentric manner. A counterforce from a work is detected by a helical spring (28). Then, rotation restraint of the female screw (22) engaged in an eccentric manner is released, and the female screw (22) is rotated. The feed screw (21) and the female screw (22) rotate in a differential manner so that traveling speed is decreased and that pressing force is increased.

Abstract: A leadscrew drive has a leadscrew follower, and a leadscrew. The leadscrew is formed as an elongated annular leadscrew shell having a thread-form outer surface. The leadscrew may be fabricated by depositing a leadscrew-shell material, such as nickel, onto a mandrel having a thread-form outer surface, so that the thread-form outer surface of the mandrel is replicated in an outer surface of the leadscrew-shell material. The mandrel may be removed, to leave a hollow leadscrew shell, or left in place.

Abstract: A force amplifier has a guide track, a non-locking screw threadedly engaging the track to spirally move in response to an axial input force applied to the proximal end of the non-locking screw. The force amplifier includes a compliant component coupled to the non-locking screw by one end and to a self-locking screw by the other end. The compliant component is configured to transmit a torque generated by the non-locking screw to the self-locking screw, which is actuated to move spirally along the track while generating an axial output force greater than the input force.

Abstract: A separable ball screw comprises a screw shaft having a helical groove; a transfer ring, a plurality of balls and a separable nut being sequentially engaged to the screw shaft; the balls being distributed in the holes in the annular surface of the transfer ring; the transfer ring being hollowed, the retaining ring enclosing around the screw shaft; the plurality of holes being formed in the annular surface; the balls being received in the holes; the balls being received in the holes of the transfer ring as power transfer medium between the transfer ring and the screw shaft; and a separable nut having a hollow center; the separable nut enclosing around the transfer ring; an inner annular surface of the separable nut having at least one grooves; the inner annular surface and the groove serving for limiting positions of the balls.

Abstract: A sliding device for use with a variety of machines is reduced in overall length, thereby being compact in construction. The sliding device has a drive train enclosure made airtight and is acceptable for use in a clean environment. The sliding device includes an elongated sliding unit enclosure of airtight construction, a sliding table and a driving motor that is coupled to the drive train enclosure in parallel with the sliding unit enclosure. The drive train enclosure receives a drive train to carry power from the driving motor to the sliding table. The drive train enclosure is mounted with the driving motor while maintaining airtightness.

Abstract: Disclosed is an electric actuator capable of effectively absorbing shock exerted on its component part. The electric actuator has a housing, a rod cover, a piston, a feed screw, a sliding nut, two piston dampers for absorbing shock exerted on the piston, a first end damper attached to one of the opposite ends of the housing, a second end damper attached to the rod cover. The sliding nut is axially displaceable relative to the piston when the piston damper absorbs shock.

Abstract: In a ball screw device, a ball screw nut is rotated, causing a screw shaft to rectilinearly move in the axial direction, and the limit of the movement of the screw shaft is determined by a stopper. The ball screw device includes a hollow shaft that rotates together with the ball screw nut and in which the screw shaft is movably fitted. The hollow shaft is provided with a small diameter portion that exerts a dragging force on the screw shaft before the screw shaft reaches the limit, and a buffer layer is formed on a tip portion of the screw shaft.

Abstract: By a linear actuator of the type comprising a driven spindle with a spindle nut, the outer positions and possibly also the intermediate positions of the spindle nut can be determined by a specially designed switch construction. This switch comprises an elongated conductor (8a), and next to this at least one other short conductor (8b), and where a connection element (10) for the spindle nut is equipped with an electric conductive element (9), for creating contact between the two conductors (8a, 8b). With two short conductors at the end of the elongated conductor end-stop switches for the nut are achieved and with more short conductors between the two end conductors the position of the spindle nut between its outer positions can be determined.

Abstract: Screwing and rolling head for the application of pre-threaded caps on containers, comprising a first support, designed to be moved with a helical motion, a second support, which is mobile with respect to the first support in a longitudinal direction and is fixed in rotation with respect to the first support, a device for screwing caps, fixed in an axial direction with respect to the second support and rotatable with respect to the second support, a torque-limiter device, connected between the screwing device and the second support, and at least one oscillating arm, which carries a rolling element and is articulated to the second support about a transverse axis. The device for screwing caps comprises a gripper, which is mobile between an open position and a closed position and is designed to grip a cap along a side wall thereof, the movements of opening and closing of the gripper being controlled by a control rod, which is mobile in an axial direction.

Abstract: A first wiring member and a second wiring member are formed of flexible wiring boards. The wiring member has a securing portion, an X extending portion, a first loop, and an X reverse portion; and the wiring member has a securing portion, an X extending portion, a first loop, and an X reverse portion. An intermediate securing portion, which is a boundary portion of the X reverse portion and a Y extending portion, and an intermediate securing portion, which is a boundary portion of the X reverse portion and a Y extending portion, are secured to an intermediate moving unit. The Y extending portions are bent at respective second loops, and head securing portions are secured to the head. When the head moves in an X direction, if the first loops move in a Y direction, the second loops move.

Abstract: A micro actuator including a translationally driving section having a moving portion which is incorporated in a case and moves translationally, and a displacement enlarging member having one end portion connected to the moving portion of the translationally driving section and another end portion connected to the case, wherein as the one end portion is pulled on the basis of the translational movement, the amount of displacement of its distal end is enlarged.

Abstract: An actuator is disclosed that utilizes a fixed screw attached at one end to an actuator housing. A rotatable tube concentric with the fixed screw rotationally drives a nut having threads engaging the threaded shaft, such that the nut moves axially relative to the tube, upon rotation of the tube. The actuator is axially coupled to the nut by thrust bearings such that the actuator rod does not rotate with the driven member.

Abstract: End-plates for linear motion sliders and linear motion sliders for use with the end-plates, particularly an end-plate for linear motion sliders and a linear motion slider for use with the end-plate, in which first and second support portions, which contact and support the outer surfaces of balls, are provided in the circumferential inner surface of the end-plate, and a space is defined between the outer surfaces of the balls and a junction surface between the first and second support portions. Therefore, the stiffness of the end-plate is increased, and the balls can stably circulate in a slider, thus reducing noise and vibration. Furthermore, the space serves to keep lubricant therein, whereby the balls can more efficiently circulate in the slider.

Abstract: Precision movement of a table part by movement of a nut over a lead screw is achieved by a less rigorously precise structure than has heretofore been thought necessary. To that end the screw is fixedly supported only at one end and is rotatable in bearings mounted within a rigidly mounted tube which at least partially surrounds the screw, play in those bearings is minimized by exerting axial pressure thereon, the nut is especially designed to engage the screw only at separated points, thereby to reduce friction and play in the nut, and the nut is connected to the moveable table part by structure passing through an opening in the tube and resiliently engaging the moveable table part to compensate for displacement and play.

Abstract: In a drive device for opening and or closing the hatch of a motor vehicle, the drive including a spindle drive with a threaded spindle and a nut, with a clutch arranged between the rotary drive and the spindle drive, the clutch includes a shifting element, a clutch element, and a clutch disk non-rotatably connected to the threaded spindle. The shifting element is rotatably drivably connected to the rotary drive. The shifting element has an axially oriented helical first ramp and the clutch element has an axially oriented helical second ramp in opposed contact with said first ramp. Relative rotation of the shifting element and the clutch element causes relative axial displacement of the shifting element and the clutch element against a spring force. The clutch element has a clutch area movable into non-rotatable engagement with the clutch disk in response to the relative axial displacement of the shifting element and the clutch element such that the rotary drive for the spindle drive also operates the clutch.

Abstract: An actuator including a threaded shaft and a carriage having a shaft engaging portion coupled to the threaded shaft. The carriage is moveable in a direction parallel to an axis of the threaded shaft upon a relative rotation between the threaded shaft and the shaft engaging portion. A ceramic bushing is coupled to the shaft engaging portion of the carriage, the bushing surrounding the threaded shaft. The ceramic bushing is much harder than heretofore used materials and results in greatly reduced particulate formation. The carriage or portion thereof can be formed around the bushing, e.g., by injection molding.

Abstract: A linear motion assembly comprising a first body arranged for operable communication with a second body for translation of the first body and the second body relative to one another. At least one of the two bodies carries a sensor that detects and monitors information related to performance-indicating characteristics of the assembly. A control module is arranged in communication with the sensor and monitors at least one performance-indicating characteristic of the linear motion assembly by monitoring corresponding signals received from the sensor. The control module also detects and provides an indication of a discrepancy in the performance-indicating characteristic.

Abstract: A bearing unit has a housing and a connecting element that is supported so that it is able to rotate around a rotation axis in the housing and is for producing a non-rotating connection between a drive shaft and a threaded spindle of a screw drive, in which at its end oriented toward the threaded spindle, the connecting element has a recess extending coaxial to the rotation axis for accommodating an end section of the threaded spindle, the end of the connecting element oriented toward the threaded spindle has at least one slot that is narrowable by a element; and a linear unit can be equipped with a bearing unit of this kind.

Abstract: An actuator arrangement comprises a pair of symmetrically loaded screw actuators driven from a common motor through respective drive shafts, and a protection arrangement arranged to avoid the continued application of full motor drive to one of the actuators in the event of the occurrence of a jam condition associated therewith.

Abstract: A device to be used with an adjusting element comprising a rod piston (3) displaceable with the aid of a motor (4) in a piston tube (2). The motor (4) is rotatably arranged at the adjusting element (1) through a worm gear (6), either directly or through a motor attachment (5), wherein the motor (4) extends in an extension plane in parallel with the piston tube (2), said worm gear (6) having a throat formation (7) for axial fixation of the position of the motor (4) in the adjusting element (1) while a free rotation of the motor (4) is practicable through 360° in order to make possible, in applications with limited space, an eligible position fixation of the motor (4) in a predetermined angle in relation to the adjusting element (1).