A step actuator includes a housing, a stator in the housing, a rotor including a magnet provided radially inward of the stator and a nut member inserted into the magnet and protruding through one side of the housing, a bearing rotatably supporting the nut member, a screw member coupled with the nut member to linearly move as the rotor rotates, and a mounting member supported on one side of the housing to support the screw member in such a manner that the screw member is linearly movable. The nut member includes an end portion passing through the bearing and a coupling portion extending from the end portion to couple with the bearing.

An electromechanical actuator (EMA) is disclosed. The EMA may comprise an EMA housing, a ball nut extending axially within the EMA housing, a ball screw extending axially within the ball nut, and/or an actuator drive unit (ADU) housing extending axially within the ball screw, the ADU housing having a proximal stop that extends radially outward of the ADU housing. The ball nut may be configured to translate axially in a proximal direction in response to a rotation by the ball screw, and the ball nut may be configured to be halted in the axially proximal translation in response to contact with the proximal stop. The proximal stop may be coupled to the ADU housing. The proximal stop may comprise a continuous annular structure.

A tool apparatus and a method for actuating a tool apparatus are disclosed. The tool apparatus includes an actuator housing, and an elongate tool manipulator extending outwardly from the actuator housing and having a plurality of control links extending along a length of the tool manipulator. The control links are operable to cause movement of a distal end of the tool manipulator in response to movement of the control links in an actuating direction generally aligned with the length of the tool manipulator. The apparatus also includes a plurality of actuators, each actuator being associated with at least one of the control links and being mounted in the actuator housing to facilitate a range of travel in a transverse direction substantially orthogonal to the actuating direction, and a plurality of linkages. Each linkage is associated with one of the control links and extends between the control link and the respective actuator and is operable to transmit drive forces between the actuator and the control link.

Systems that provide an active adjustment of mirrors and specifically of secondary mirrors, and that provide active adjustment of secondary mirrors in six degrees of freedom, and that can carry the additional load during launch.

A cylinder assembly includes a cylinder, a nut and screw assembly, a thrust tube that extends axially from the nut and out the cylinder, a drive assembly mounted to the cylinder for rotating the screw to effect axial translation of the nut relative to the screw, thereby causing the thrust tube to axially extend or retract relative to the cylinder, and an anti-rotate feature for restricting rotation of the nut relative to the cylinder. The anti-rotate feature may include a guide member coupled to the nut and including at least one key on one of the guide member or the cylinder and at least one corresponding slot on the other of the guide member or the cylinder that engages on the key. The guide member may be allowed limited movement relative to the nut and/or the cylinder thereby preventing binding of the nut relative to the cylinder.

An actuator includes a ball nut, a ball screw, and a ball screw stop. The ball nut is adapted to receive an input torque and in response rotates and supplies a drive force. The ball screw extends through the ball nut and has a first end and a second end. The ball screw receives the drive force from the ball nut and in response selectively translates between a retract position and a extend position. The ball screw stop is mounted on the ball screw proximate the first end to translate therewith. The ball screw stop engages the ball nut when the ball screw is in the extend position, translates, with compliance, a predetermined distance toward the first end upon engaging the ball nut, and prevents further rotation of the ball screw upon translating the predetermined distance.

Provided is a motion control device. The device comprises one or more frames which supports an exoskeleton of a body; a string which connects the frames with each other; a pulley which is disposed between the frames and connected to one end of the string; and a motor which is connected to the other end of the string to control the string, wherein the pulley rotates the string according to control of the motor.

A drive arrangement for solar modules is disclosed. The drive arrangement comprises a transmission member rotatable about a rotational axis comprising a drive member and a holding member, wherein the drive member is disposed with an offset in the radial direction to the holding member, and an output unit, wherein the output unit comprises a drive recess and a retaining recess, wherein the drive member is assigned to the drive recess and engages with the drive recess to drive the output unit, wherein the holding member is assigned to the retaining recess and engages with the retaining recess to keep the output unit in its set position, wherein the drive recess has an entry opening, an end area, and a middle area that is between the entry opening and the end area, wherein the drive recess in the middle area compared to the end area has a reduced cross section.

A drive arrangement for solar modules is disclosed. The drive arrangement comprises a transmission member rotatable about a rotational axis comprising a drive member and a holding member, wherein the drive member is disposed with an offset in the radial direction to the holding member, and an output unit, wherein the output unit comprises a drive recess and a retaining recess, wherein the drive member is assigned to the drive recess and engages with the drive recess to drive the output unit, wherein the holding member is assigned to the retaining recess and engages with the retaining recess to keep the output unit in its set position, wherein the drive recess has an entry opening, an end area, and a middle area that is between the entry opening and the end area, wherein the drive recess in the middle area compared to the end area has a reduced cross section.

An adjustable stroke device for a random orbital machine has a housing with a central axis and a wall defining a cavity. At least one counterweight is movably disposed at least partially within the cavity. A mounting assembly is disposed at least partially within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjuster couples the at least one counterweight with the mounting assembly. The stroke adjuster enables the at least one counterweight and mounting assembly to move with respect to one another such that a distance between the at least one counterweight and the mounting assembly may be variably adjusted which, in turn, variably adjust a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing. The stroke adjuster has an adjuster ring and a cam mechanism secured with the adjuster ring.