Abstract: A ball screw spline assembly includes a ball screw spline including a first nut including a first mounting surface adapted to receive a first fastening element; a second nut including a second mounting surface adapted to receive a second fastening element; and a shaft passing through the first nut and the second nut; the housing including a first portion and a second portion, the first portion extends in a direction substantially parallel to the shaft, and the second portion extends in a direction substantially perpendicular to the shaft; a connecting plate coupling the second nut to the first portion, the first nut is installed to the second portion; the first mounting surface and the second mounting surface are located within a space defined by the first portion, the second portion and the connecting plate, such that the ball screw spline is integrally installable to the housing.

Abstract: An actuator includes an end fitting, a ball screw connected to the end fitting, a ball nut engaged with the ball screw, a rod disposed at least partially within the ball screw, and a rotating member engaged with the rod. A method of verifying an actuator may include rotating a manual input portion in a first direction under substantially no load until the manual input portion stops, rotating the manual input portion in a second, opposite direction until a first torque is measured, determining a first rotational angle at which the first torque was measured, rotating the manual input portion in the first direction until a second torque is measured, determining a second rotational angle at which the second torque was measured, and verifying a second load path if a backlash is within a predetermined range.

Abstract: A jam-tolerant electromechanical linear actuator having a contra-rotating axial flux permanent magnet (PM) motor having a first and second rotor shafts in a motor housing. The actuator also includes a first speed reduction mechanism operably coupled to the first rotor shaft and a second speed reduction mechanism operably coupled to the second rotor shaft; a first output shaft operably coupled to a output of the first speed reduction mechanism and a second output shaft operably coupled to an output of the second speed reduction mechanism. The actuator also includes a housing enclosing the PM motor, first speed reduction mechanism and second speed reduction mechanism and a slide mechanism operably coupled to the housing. The slide mechanism permit the housing to slide when the motor housing is fixed to the housing or the motor housing to slide with respect to the housing when the housing is held fixed.

Abstract: An electric motor equipped with deceleration device (1) is provided with a main shaft component (200) that is formed substantially in a circular rod shape, and has one end portion (201) that is rotatably supported at a substantial center of a bottom portion (111) of a motor housing (110) and another end portion (202) that protrudes towards an outer side through an aperture in the motor housing (110), the main shaft component (200) is fixed to the motor housing (110) via the one end portion (201).

Abstract: A ball screw with a dust-proof and lubricating device comprises: a screw, a nut, a plurality of balls, an oil-absorbing member, a return unit, and two dust-proof members. The nut includes an axial oil-guiding hole, a plurality of radial oil holes in communication with the oil-guiding hole and the helical groove of the nut, and an oil-feeding hole in communication with one of the radial oil holes. The oil-absorbing member is disposed in the oil-guiding hole and the radial oil holes. The return unit is disposed in the nut to enable the turning and circulation of the balls. The two dust-proof members are located at both ends of the axial hole. The ball screw can still be lubricated when it is disposed in a vertical position, and the dust-proof and lubricating device which won't add axial length to the nut.

Abstract: A mechanical jack comprising a casing which encloses a reduction unit and a linear actuator device. The jack is characterized by the fact that the driven gear of the reduction unit is directly coupled, i.e. without the interposition of further mechanical elements, with a nut or more nuts of the linear actuator device.

Abstract: A cylinder device is capable of heightening the feed accuracy of a screw shaft and stably controlling the feed speed of a conveying unit in a wide speed range. A ball screw shaft is inserted through a hollow shaft motor having an end fixed to a housing, and a decelerator that is a planetary reduction gear unit connected to the hollow shaft motor. Each of a pair of ball screw nuts, which are disposed to face each other and between which the hollow shaft motor and the decelerator are placed, meshes with the ball screw shaft. An internal gear is connected to a spacer disposed at an end of an output gear of the decelerator. An external gear connected to the ball screw nut meshes with the internal gear. The output gear of the decelerator meshes with a connection shaft by splines.

Abstract: An actuator includes a first rotary motor, a second rotary motor, and a transmission coupled to the first and second rotary motors. The transmission converts rotation of the first rotary motor in a first direction and simultaneous rotation of the second rotary motor in a second direction to linear motion of an output shaft in a single direction. The actuator is usable in an active automobile suspension.

Abstract: An actuating device for a transmission of a vehicle, particularly a commercial vehicle, a bus, or the like, moves a trip cam of the transmission forward or backward in the longitudinal direction, and in the transverse direction in one direction or the other transversely to the longitudinal direction. It has a spindle, which includes two axially adjacent thread sections with opposing thread directions, with a spindle nut on each thread section of the spindle, with a drive motor for each spindle nut to drive it in a rotary manner, and with a coupling member that engages with the trip cam and moves it in the longitudinal and transverse directions, and which is actuatable using the spindle.

Abstract: A housing has a screw shaft passing wall in which a through hole, through which a screw shaft passes, is formed. A spline outer cylinder is held at one end by the screw shaft passing wall, and a disc spring that biases the spline outer cylinder toward the screw shaft passing wall is arranged at the other end of the spline outer cylinder. A tapered recess is formed in one end face of the spline outer cylinder, and a tapered projection that is fitted in the tapered recess is formed in a face of the screw shaft passing wall of the housing, which faces the spline outer cylinder.

Abstract: Cutting apparatus having a ram axis gear tube (32) equipped with internal threads engageable with external threads (48) of a main shaft (42). A tool can be fixed to the main shaft (42). The external threads (48) of the main shaft (42) are formed on external splines (44). A main shaft rotation gear (46) has internal splines (41) mating with the external splines (44) of the main shaft (42). Rotation of the ram axis gear tube (32) thus causes the main shaft (42) to move axially via the internal and external threads. Rotation of the main shaft rotation gear (46) causes rotation of the main shaft (42). The tool fixed to the main shaft (42) can thus undergo axial and rotational movements. A motor (74) can be coupled to the main shaft (42) and a motor shaft (63) extended through the ram axis gear tube (32) and the main shaft (42). The motor shaft (63) can drive a linear gear (68) of a cross slide assembly (24) and thus radially move a tool fixed to the cross slide assembly (24).

Abstract: Apparatus embodying the invention includes first and second motors coupled to a carriage assembly for moving the carriage assembly back and forth between first and second end points. The first motor is for developing a force to drive the carriage in one direction and the second motor is for developing a force to drive the carriage in an opposite, second direction. When the first motor causes the movement of the carriage in one direction, the slowing, stopping and reversal of the carriage is achieved by varying the power supplied to the second motor relative to the power supplied to the first motor until the force exerted by the second motor first equals and then exceeds the force exerted by the second motor. So operated, the carriage motion is well controlled and exhibits little, if any, backlash.

Abstract: A nut member 5 for moving forward and rearward by rotating a feed screw 4 by a stepping motor 28 and a transfer table 7 for transferring a workpiece W are elastically connected by a spring means 24 in transferring of the workpiece to thereby allow the nut member 5 to overrun by flection of the spring means 24, to allow the stepping motor 28 to rotate excessively in a cushioned manner, and to obtain a thrust for pushing the workpiece against an object after the transfer table 7 reaches the transfer end of the workpiece.