A linear actuator including the gap compensating unit with the joints and the elastic units to provide the elasticity thereby compensating the offset during the linear motion and maintaining the stability and linearity.

A linear actuator having a free fall function. The linear actuator moves a piston-rod member back and forth using torque of a rotary motor. Here, the piston-rod member is disposed within a portion of a cylinder body to be movable back and forth. In the event of jamming in which the piston-rod member is stopped due to sticking between an operating nut and a screw member, the piston-rod member is caused to freely fall in a direction in which load is applied. This can consequently obtain the maximum stretched length of the piston-rod member, thereby providing safety in an emergency.

A coupling e.g. for an actuator, includes a housing which is preferably in the form of a ring mounted around the end of an outer rod of the actuator and which can be mounted to a component e.g. a cowl being deployed. Within the housing of the coupling is provided an eccentric bearing mount and bearing arrangement mounted eccentrically to the housing so as to permit some eccentric movement.

A gimbal having a split design, which can be used in an assembly for actuating an aerodynamic high lift device, is described. The gimbal enables a rotating load path when a force is transferred from the actuator to the high lift device via the gimbal. In particular, the split design can include two receivers which can be coupled to posts extending from a nut. The nut can be secured to a shaft which receives a force generated by the actuator. In one embodiment, the actuator can rotate the shaft to cause the gimbal to translate along the shaft. The split design provides a more compact form factor and is lighter in weight than traditional gimbal designs.

The present invention relates to an actuation device (1) comprising a threaded shaft (2) connected at one end to driving means adapted to allow the threaded shaft (2) to rotate about its longitudinal axis (). The device further comprises a movable element (3) provided with a cylindrical cavity (30) adapted to receive the threaded shaft (2), and configured in such a way that a rotation of the threaded shaft (2) corresponds to a translation the movable element (3) along the longitudinal axis (). The device (1) further comprises two guiding rods (4,4) coupled to the movable element (3) and adapted to constrain the translation of the latter along a direction parallel to the longitudinal axis (). The movable element (3) comprises a first (31) and a second (32) element constrained to each other, wherein the first element (31) is coupled to the threaded shaft (2) and the second element (32) is coupled to the two guiding rods (4,4). A portion (320) protrudes from the second element (32) adapted to fit into a seat (312) formed in the first element (31), and wherein the portion (320) and the seat (312) are shaped in such a way that the contact between the seat (312) and the portion (320) takes place in a contact zone that extends along a section of the portion (320) whose midpoint lies in a plane that comprises the longitudinal axis () and is parallel to the plane which comprises the development axes (,) of the two guiding rods (4,4).

An actuator includes a frame, a guide rail attached to the frame, a slider guided by the guide rail, a rotational motion-linear motion conversion mechanism that is disposed on a side opposite to the guide rail with the frame interposed therebetween and includes a screw shaft supported by the frame and a nut attached to the screw shaft, and a coupling member that couples the slider and the nut. The coupling member is coupled to the nut via a nut bracket. The coupling member is an annular member along an axial direction of the screw shaft, and includes a slider connection portion that has a plate shape and is fixed to the slider, and a nut bracket connection portion that has a plate shape and is fixed to the nut bracket.

A power steering assembly has a housing and a ball nut assembly supported on the housing. The ball nut assembly has a ball nut axis. The housing has a first surface between the housing and the ball nut assembly. The ball nut assembly also has a second surface. The second surface rotates on the first surface such that the ball nut assembly rotates relative to the housing on a rotation axis that is transverse to the ball nut axis.

A feed mechanism, which is capable of suppressing feed irregularity caused by the inclination of a nut of a feed screw, is obtained. A feed mechanism (sub-scanning mechanism) includes a feed screw that includes a screw shaft and a nut and a moving body, and the nut is moved on the screw shaft by a rotation of the screw shaft, so that the moving body is moved in the direction of the screw shaft. The inclination of the moving body with respect to the nut is allowed in a case in which the moving body is moved by a movement of the nut.

A ball screw drive (10) including a threaded spindle (12) having a first, free end (16) and a second end (17) which can be connected to a drive, and a spindle nut (14) at least partially enclosing the threaded spindle (12) coaxially. A plurality of balls (26) recirculate in the space between the threaded spindle (12) and the spindle nut (14) form the core element. An extension sleeve (15), which connects coaxially to the spindle nut (14), is fixedly connected to the latter and moves together with it relative to the threaded spindle (12). At the first end (16) of the threaded spindle (12), a substantially circular bearing ring (18, 30, 50, 70) is attached to the outer circumference of the threaded spindle (12), which circular bearing ring serves as a shaft bearing between the threaded spindle (12) and the extension sleeve (15) and which has a noise-dampening effect due to at least one integrated spring/damping element. This spring/damping element of the bearing ring (30, 50, 70) is preferably a combination of at least one notch (32, 52, 72) on the inner circumference of the bearing ring (30, 50, 70) and an annular gap (34, 54, 74).

A sliding device for supporting a seat in a slidable manner includes: a fixed rail; a movable rail; a screw rod extending along a central axis parallel to a longitudinal axis of the movable rail; a nut portion attached to the fixed rail such that the nut portion is limited in displacement along the longitudinal axis relative to the fixed rail; a first support portion supporting one end of an extension axis of the screw rod in a rotatable manner such that the first support portion limits the one end from moving along the longitudinal axis; and a second support portion supporting the other end of the extension axis of the screw rod in a rotatable manner such that the second support portion limits the other end from moving beyond a predetermined length along the longitudinal axis.