Disclosed is a linear actuator, including a housing, a drive worm, a rotating screw and a drive nut. The drive worm drives the rotating screw to rotate. The rotating screw rotates to drive the drive nut to move axially along the rotating screw. A clutch means is arranged between the drive worm and the rotating screw. The clutch means includes a coupling gear sleeve axially movable relative to the rotating screw. The rotating screw is sleeved with an axial limiting sleeve. The axial limiting sleeve and the housing are abutted axially. The axial limiting sleeve and the rotating screw maintain alignment in an axial direction. When the rotating screw is subjected to an axial load, the rotating screw transmits axial force to the housing through the axial limiting sleeve, and the axial force is not transmitted between the coupling gear sleeve and the axial limiting sleeve in the axial direction.

A landing gear includes a strut and an electromechanical actuator coupled to the strut. The electromechanical actuator includes a motor assembly, a ball nut, a split ball screw disposed between the motor assembly and the ball nut, and an actuator release assembly coupled to the split ball screw.

Disclosed is a linear actuator, including a drive motor, a transmission assembly, a rotary screw, a transmission nut, a clutch device, a self-locking device and a hand-pull release assembly. The clutch device is arranged between the transmission assembly and the rotary screw. The self-locking device is configured to generate frictional resistance to the rotary screw when the rotary screw rotates reversely, and the self-locking device includes a release torsion spring. The hand-pull release assembly includes a first driving member connected with the clutch device and a second driving member connected with the self-locking device, and has an initial state and a fully released state. During the process from the initial state to the fully released state, the first driving member drives the clutch device to disconnect power, and the second driving member drives the release torsion spring to extend.

An actuator and a transmission structure thereof. The transmission structure (3) includes a screw nut (31) and a ratchet guiding sleeve (32). The screw nut (31) includes one or a plurality of pawls (311). The ratchet guiding sleeve (32) is mounted on the screw nut (31), and the screw nut (31) is able to rotate relative to the ratchet guiding sleeve (32). The ratchet guiding sleeve (32) includes a ring ratchet (321) disposed on an inner circumference thereof and a plurality of track slots (322) disposed on an outer circumference thereof. One or a plurality of pawls (311) abut against the ring ratchet (321), thereby achieving the effect of smooth movements of the actuator (10) and the transmission structure (3).

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

Multi-RET actuators include a plurality of shafts that have respective axially-drivable members mounted thereon. Each of axially-drivable member is mechanically linked to a respective one of a plurality of phase shifters. The multi-RET actuator further includes a motor having a drive shaft and a gear system that is configured to selectively couple the motor to the respective shafts. The gear system is configured so that rotation of the drive shaft in a first direction creates a mechanical linkage between the motor and a first of the shafts 1340/1342, and rotation of the drive shaft in a second direction that is opposite the first direction rotates the first of the shafts.

The invention relates to a control drive, in particular a spindle drive for adjusting a swivellable vehicle flap, comprising a housing (2), a spindle rod (3) that is rotatably mounted in the housing (2), a first coupling element (5) for driving a rotational movement of the spindle rod (3), and a torque-limiting device (6) arranged between the first coupling element (5) and the spindle rod (3) for limiting the torque transmitted from the first coupling element (5) to the spindle rod (3), comprising an adapter sleeve (8) arranged at a first end (3a) of the spindle rod (3) in a rotationally fixed manner, and a first tolerance element (13) arranged between the spindle rod (3) and the first coupling element (5). According to the invention, a control drive is provided, which is designed such that it is compact and can be economically produced, in such a way that the first tolerance element (13) is rotationally fixed to one of the first coupling element (5) and the adapter sleeve (8).

An actuator assembly for a cowl door is provided. The actuator assembly includes a housing, an actuator configured to drive cowl door extension and cowl door retraction and to support the cowl door during the cowl door extension and the cowl door retraction and a clutch assembly interposed between the actuator and the housing. The clutch assembly is configured to engage a capability of the actuator to drive the cowl door retraction when the cowl door loads the actuator.

A method of operating an electromechanical actuator includes coupling an inner portion of a split ball screw with an outer portion of the split ball screw, rotating the split ball screw about an axis to drive a ball nut in a first axial direction, in response to a failure mode of the electromechanical actuator, decoupling the outer portion of the split ball screw from the inner portion of the split ball screw, and translating the outer portion of the split ball screw and the ball nut in a second axial direction.

An actuator and a transmission structure thereof. The transmission structure (3) includes a screw nut (31) and a ratchet guiding sleeve (32). The screw nut (31) includes one or a plurality of pawls (311). The ratchet guiding sleeve (32) is mounted on the screw nut (31), and the screw nut (31) is able to rotate relative to the ratchet guiding sleeve (32). The ratchet guiding sleeve (32) includes a ring ratchet (321) disposed on an inner circumference thereof and a plurality of track slots (322) disposed on an outer circumference thereof. One or a plurality of pawls (311) abut against the ring ratchet (321), thereby achieving the effect of smooth movements of the actuator (10) and the transmission structure (3).