Shock and vibration isolating mountings for aircraft engines and the like

摘要

1,009,788. Spring mountings. ROBINSON TECHNICAL PRODUCTS Inc. Oct. 1, 1962 [Oct. 10, 1961], No. 37060/62. Heading F2S. A trunnion mounting comprises a plurality of cylindrical cushions 28, 32, arranged radially of the axis of the trunnion and a pair of tubular cushions 34, 36 extending axially of the trunnion, the inner ends of the tubular cushions being crenelated to provide semi-circular pockets for receiving and securing the cylindrical cushions. In the construction shown the inner ends of the cylindrical cushions abut against the trunnion receiving sleeve 16 and their outer ends co-operate with shallow metal cups 44, 48 of a trunnion ring 22. The tubular cushions 34, 36 are clamped about the cylindrical cushions in annular depressions 30, 32 of two flanges 18, 20. The inner peripheries of the flanges 50, 52 pass over a reduced diameter portions of the sleeve 16, the portions being then rolled over to lock the flanges in position. The cushions may be fabricated from transversely crimped lengths of wire lying longitudinally of the cushions and crimped together. The lengths of wire may comprise separate pieces of wire joined at their ends or the parallel segments of a piece of wire turned back and forth upon itself. The tubular cushions 34, 36 are produced by pressing a cylindrically shaped cushion in a mould. Thus the material extending into a pocket of the cushion is more compressed than the material in the region between the pockets. The initial lengths of cushions are greater than their mounted lengths thus allowing a predetermined pre-stressing to be effected.