Aircraft undercarriage

摘要

An undercarriage (6) provided with an undercarriage leg (10) and a shock absorber (20), said undercarriage (6) including an actuator-shock absorber (30), said undercarriage leg (10) comprising both a first element (11) carrying contact means (13) and a second element (12), which elements are hinged to each other. The undercarriage (6) includes pivot means (40) enabling said undercarriage leg (10) to pivot firstly in a first direction (S1) in order to retract said undercarriage leg (10) into said housing (4) under drive from said actuator-shock absorber (30), and secondly, during an emergency landing, in a second direction (S2) opposite to the first direction (S1) in order to move said undercarriage leg (10) away from said housing (4) while stressing said actuator-shock absorber (30).

主权项

1. An undercarriage comprising:
an undercarriage leg including a first shock absorber being movable between a deployed position for landing and a retracted position where the undercarriage leg is retracted into a housing of an aircraft, the undercarriage leg including a first element hinged to a second element to define a scissor linkage; a wheel carried by the first element of the scissor linkage; a second actuator-shock absorber hinged to the first shock absorber and configured to be actuated retracting and deploying the undercarriage leg, and also for performing an energy-absorption function during an emergency landing; and a pivot means including a sole cylinder secured to the first shock absorber and the housing, wherein the undercarriage leg pivots in first and second pivot directions about the pivot means when the sole cylinder is extended and retracted to pivot the undercarriage leg in the first and second pivot directions, wherein the first and second pivot directions are oriented at an acute angle relative to a longitudinal axis of the aircraft, wherein from the deployed position, the undercarriage leg is moved to the retracted position into the housing by extending the second actuator-shock absorber and retracting the sole cylinder in so that the undercarriage leg pivots inward and rearward at the acute angle about the pivot means in the first pivot direction to the retracted position, and wherein, during the emergency landing, while the second actuator-shock absorber is in a retracted position, the sole cylinder extends in the second pivot direction opposite to the first pivot direction in order to move the undercarriage leg away from the housing at the acute angle in the second pivot direction.