摘要:
An actuator arrangement comprises a pair of symmetrically loaded screw actuators (14) driven from a common motor (22) through respective drive shafts (20), and a protection arrangement (36, 40) arranged to avoid the continued application of full motor drive to one of the actuators (14) in the event of the occurrence of a jam condition on associated therewith.
摘要:
L'invention concerne un actionneur télescopique comportant un corps (1) dans lequel une tige principale (2) est montée pour coulisser télescopiquement selon un axe de coulissement (X) entre une position rentrée et une position sortie. L'actionneur comporte une tige auxiliaire (20) montée pour coulisser télescopiquement dans la tige principale selon le dit axe de coulissement entre une position rentrée et une position sortie, l'actionneur comportant des moyens commandés de retenue (30,31,32,33) de la tige auxiliaire en position rentrée dans la tige principale.
摘要:
Ein Linearantrieb (10) zum Verstellen von wenigstens einem beweglichen Bauteil wird gezeigt, der mit mindestens einem Spindeltrieb ausgestattet ist, auf dessen rotierend antreibbare Spindel (11) eine gegen Drehung gesicherte Hubmutter (15) und mindestens eine gegen Drehung gesicherte Sicherheitsmutter (16) aufgesetzt und bei dem die Hubmutter (15) mit einem beweglichen Bauteil gekoppelt ist. Dabei sind die Hubmutter (15) und die Sicherheitsmutter (16) verbindungslos zueinander angeordnet, wobei die Sicherheitsmutter (16) aus einer auf die Spindel (11) aufgesetzte Innenmutter (21) und einem darauf aufgesetzten äußeren Führungsring (22) besteht, und die Innenmutter (21) und der Führungsring (22) durch Formschlussbauteile (24, 25) derart miteinander gekoppelt sind, dass mindestens ein Formschlussbauteil (25) derart konstruktiv ausgelegt ist, dass bei einem vorgegebenen Lastmoment die Formschlussbauteile (24, 25) außer Eingriff bringbar sind.
摘要:
An actuator including a rotatable gear wheel (14) reversibly driveable by a motor, the gear wheel (14) being operably connectable to an output element (20) by a drive transfer device (18), the output element (20) being moveable between a first and second position, in which the drive transfer device (18) is operably disconnectable from the output lever to allow independent movement of the output lever (20).
摘要:
A linear actuator comprises a driven spindle (10) of metal having a nut (12) of polymeric material which further is connected to the expelling rod (14) of the actuator. The nut and expelling rod are joined to each other by intermeshing embossing mate for contemporary transfer of axial forces and torques. With a polymeric nut a number of advantages are obtained such as low friction, lifetime lubrication, low noise level, low production and maintenance costs. Furthermore, a possibility is provided for in a simple manner to provide the actuator with a safety nut connected to the main nut (12) with breakable entrainment means.
摘要:
A linear actuator comprises a driven spindle (10) of metal having a nut (12) of polymeric material which further is connected to the expelling rod (14) of the actuator. The nut and expelling rod are joined to each other by intermeshing embossing mate for contemporary transfer of axial forces and torques. With a polymeric nut a number of advantages are obtained such as low friction, lifetime lubrication, low noise level, low production and maintenance costs. Furthermore, a possibility is provided for in a simple manner to provide the actuator with a safety nut connected to the main nut (12) with breakable entrainment means.
摘要:
Linear electromechanical actuator with a main screw-nut assembly driven by a main motion device and having a hollow screw with an abutting surface; an anti-jamming piston arranged coaxially within the hollow screw and shiftable between an engaged position in which a plurality of locking dogs interfere with the abutting surface and a disengaged position in which the anti-jamming piston is free to slide within the hollow screw; and actuating means configured to shift the anti-jamming piston from the engaged position to the disengaged position upon electrical or mechanical failure of the linear electromechanical actuator. The actuating means include a key axially movable between the engaged and the disengaged positions and having a locking section, configured to bias the locking dogs into interference with the abutting surface in the engaged position, and an unlocking section, configured to allow free sliding of the anti-jamming piston within the hollow screw in the disengaged position. Another aspect refers to an anti-jamming device for operating a critical flight control surface.