| 摘要 |
A semi-levered landing gear for an aircraft comprising: a main shock absorber strut (1) with upper and lower telescoping portions, with the upper portion (2) connectable to the airframe; a bogie beam (4) to extend fore and aft of the aircraft fuselage with at least one forward axle and one aft axle for respective forward and aft wheels and a main pivot between the forward and aft axle pivotally connected to the lower portion of the main shock absorber strut; and an auxiliary mechanism comprising a lever unit (92), a spring unit (94) and a positioning unit (90), with a first one of said units pivotally connected to the upper portion of the main shock absorber strut so as to pivot between a predetermined lower position for take-off and landing and an upper position, a second one of said units pivotally connected at an upper end to the upper portion of the main shock absorber strut and pivotally connected at a lower end to the first one of said units, and a third one of said units pivotally connected at a lower end to the bogie beam at an auxiliary pivot and connected at an upper end to the lever, the positioning unit assuming one of a contracted state or extended state for taxiing, take-off and landing, and the other of the contracted or extended state for stowing the landing gear after take-off, and the spring unit providing spring resistance to pivotal movements of the bogie beam about the main pivot during taxiing. |
