Abstract:
A landing gear for a vehicle includes a strut configured for reciprocating movement between a stowed position and a deployed position. A shock absorber has a first element slidingly disposed within the strut and a second element slidingly coupled to the first element. A trailing arm is rotatably coupled to the second element. A first linkage is coupled to the first element, wherein the first linkage drives the first element between a raised position when the strut is in the stowed position and a lowered position when the strut is in the deployed position. The landing gear further includes a second linkage coupled to the trailing arm. The second linkage rotates the trailing arm between a first trailing arm position when the strut is in the stowed position and a second trailing arm position when the strut is in the deployed position.
Abstract:
Systems and methods for mechanically rotating an aircraft about its center-of-gravity (C G ) are disclosed. The system can enable the rear, or main, landing gear to squat, while the nose landing gear raises to generate a positive pitch angle for the aircraft for takeoff or landing. The system can also enable the nose gear and main gear to return to a relatively level fuselage attitude for ground operations. The system can include one or more hydraulically linked hydraulic cylinders to control the overall height of the nose gear and the main gear. Because the hydraulic cylinders are linked, a change on the length of the nose cylinder generates a proportional, and opposite, change in the length of the main cylinder, and vice-versa. A method and control system for monitoring and controlling the relative positions of the nose gear and main gear is also disclosed.
Abstract:
Die vorliegende Erfindung betrifft einen Linearaktuator mit einem Spindeltrieb, an dessen Spindelmutter (40) eine translatorische Bewegung abgreifbar ist, und mit einem elektrischen Antrieb zur Betätigung der Spindel (30), wobei die Spindel in axialer Richtung auf einer Stange (20) verschiebbar gelagert ist und mit der Stange einen abgeschlossenen Hohlraum (50) bildet, wobei der Hohlraum durch ein Hydraulikmedium mit Druck beaufschlagt ist, um die Spindel in der regulären Arbeitsposition auf der Stange zu halten, und weiterhin Mittel (118) zur Reduzierung des Drucks im Hohlraum vorgesehen sind, so dass der Spindeltrieb aufgrund seiner Gewichtskraft in axialer Richtung auf der Stange verschiebbar ist.
Abstract:
The invention relates to the landing gear of an aircraft, comprising a strut (1) having two arms forming a rotational axis (2) for retracting the gear, a rotating tube (6) mounted in a mobile manner in such a way that it rotates inside the strut about a pivoting axis, and a sliding rod (7) that is mobile in a translatory manner in said rotating tube (6) along the pivoting axis, and carries the wheel(s) of the gear at one of its ends, said gear also having at least one bearing point (11a, 11b) that is located on one of the elements of said gear at a distance from the retraction axis (2) and can bear the necessary efforts for the retraction, characterised in that said bearing point is located on the rotating tube (6).
Abstract:
L'objet de l'invention est un atterrisseur (1) d'aéronef comprenant une jambe (2), une potence (10) définissant un axe de rotation de la jambe dans un plan de manoeuvre (P) défini par une position sortie de la jambe (2) et une position rentrée de la jambe (2) et un dispositif de manoeuvre de la jambe comprenant au moins une contrefiche (3, 4) comportant une première extrémité pourvue d'un premier moyen de liaison (5) avec un élément de l'atterrisseur et une seconde extrémité pourvu d'un second moyen de liaison (6) avec un élément (7a) d'une case de train recevant l'atterrisseur pour lequel ladite au moins une contrefiche s'étend hors du plan de manoeuvre de la jambe de l'atterrisseur.
Abstract:
A landing gear (10) is equipped with a mechanism (66) that isolates a hydraulic pitch trimmer (72) outside of the landing loop thereby eliminating the need for complex hydraulics normally associated with articulated landing gear designs equipped with pitch or trimmers or other articulating actuators. The mechanism comprises an articulated strut (68) connected between a bogie beam (18) and a shock strut cylinder (24) for controlling the pitch of the bogie beam, an over-center linkage (70) connected between the articulated strut and the shock strut cylinder, and an externally powered actuator (72) connected to the over-center linkage for moving the over-center linkage between the over-center locked position and other another position articulating the bogie beam from an end of take-off position to a stowage position, whereby the bogie beam can be properly angularly positioned relative to the shock strut for retraction into an aircraft landing gear bay.