A self-locking arrangement for a motor and a linear actuator which relates to motors. The motor has a self-locking capability, a good stability, a low noisy during operation, and a good user experience. The self-locking arrangement includes an end cap mounted on the motor and a friction ring sleeved over a drive shaft of the motor, a notch being provided on the friction ring, a limiting portion being provided at an outer periphery of the friction ring, the end cap being fitted with the limiting portion, so that the friction ring clasps the drive shaft in a case where the drive shaft rotates along a first direction.

A drive arrangement for adjusting an aerodynamic flap on a vehicle. The drive arrangement includes an electric motor, a spur gear mechanism having gear stages, an output shaft, and at least two housing halves. The spur gear mechanism includes at least one self-locking gear stage that does not form the first gear stage nor the last gear stage of the spur gear mechanism. A safety coupling is arranged between the self-locking gear stage and the output shaft to disengage the output drive on overload in order to protect the flap attached thereto from damage.

The present invention relates to a drive arrangement, comprising a motor drive shaft, which makes the drive force of a motor available, an output shaft, via which the drive arrangement outputs and accumulates a rotational force, a coupling, which is designed to transmit a rotational force from the motor drive shaft to the output shaft and from the output shaft to the motor drive shaft, and a braking arrangement, which counteracts a rotational movement of the output shaft with a braking force.

A door curtain anti-dropping device for a rolling door is provided. The device comprises a worm shaft connected to the output shaft of the door operator, and a drive shaft comprising a limiting disc with through holes. The worm wheel having receiving slots is fixed on the drive shaft to mesh with the worm. The driven wheel is disposed adjacent to the limiting disc. Baffle plates designed to cover the through holes and receiving slots extend from the driven wheel. Plural latching pins stored with spring potential energy are compressed by the baffle plates and retained in the through holes and receiving slots. When the worm wheel is excessively worn and dislocated from the driven wheel, the baffle plates are moved to allow the latching pins to spring out and insert into the notches of the front cover, thereby lock the worm wheel and prevent the winding shaft from rotating.

A door curtain anti-dropping falling device for a rolling door is provided. The device comprises a worm connected to the output shaft of the door operator, a drive shaft driving the winding shaft, a worm wheel having plural oblique elongated grooves and fixedly mounted on the drive shaft and meshes with the worm, a driven wheel having plural oblique elongated holes and is driven by the worm to move synchronously with the worm wheel, a limiting disk for restricting the driven wheel from moving axially, and plural latching pins extending through the elongated holes and received in the elongated slots. Under the normal operation of the door operator, the latching pins are retained in the center positions of the elongated holes and grooves. When the worm wheel are excessively worn and dislocated from the driven wheel, the latching pins lock the worm wheel and stop the winding shaft from rotating.

An actuator system includes a motor, a ballscrew assembly coupled to the motor, a no back brake device coupled to the ballscrew assembly, and a sensor coupled to the ballscrew assembly. The sensor is configured to acquire load data regarding a load applied to the no back brake device. A control module is configured to determine an estimated coefficient of friction for the no back brake device based on the load data, and transmit an alert signal based on determining that the estimated coefficient of friction is outside a predetermined range. The control module is coupled with the sensor and includes a processor coupled with a non-transitory processor-readable medium storing processor executable code.

A torque limiter and no-back assembly comprises an input shaft, an output shaft, a torque limiter provided between the input shaft and the output shaft, the torque limiter comprising a torque sensing element; and a no-back device arranged to brake the output shaft when the torque sensing element senses levels of torque above a threshold level between the input shaft and the output shaft, characterised in that the torque sensing element comprises a torsion spring having ends which are coupled to the input shaft and the output shaft for rotation therewith.

An adjustable electric actuator system includes an actuator output, a compliance element coupled to the actuator output, and an end fitting element encapsulating at least a portion of the compliance element, wherein the compliance element is guided a first distance in a first axial direction by the actuator output, the first distance being limited by a first limitation element.

A self-locking nut and screw assembly may include a screw and a first nut rotatable and linearly translatable with respect to each other. The assembly may also include a first motor configured to provide torque to one of the screw and the first nut. The assembly may further include a locking mechanism configured to lock the screw to prevent backdrive when the motor is not providing torque to the one of the screw and the first nut.

A synchronous motor, including: an orientation sheet, an orientation gear set, a casing, a rotor, a transmission gear set, an input gear and an output gear set; wherein the orientation sheet is connected with the orientation gear set, and the orientation sheet is provided with a positioning rod, an orientation member and a groove for storing lubricating oil; the bottom surface of the casing is provided with a positioning groove, and the positioning rod is slidably connected with the positioning groove; the rotor is provided inside the casing, the rotor protrudes from the bottom of the casing and is provided with an orientation boss, and the orientation boss bears against the orientation member.