| 摘要 |
1,264,088. Helicopter motors. BENDIX CORP. 20 Nov., 1970 [25 Nov., 1969], No. 55296/70. Heading B7W. [Also in Division F2] A laminated tension-torsion tie-bar coupling for securing helicopter rotor arms comprises end bushes to receive pins from the structures being coupled-joined by an endless laminated belt 28 the centre portion of which is formed into parallel sections 40, 42 by a pair of clips 36, 38. The clips consist of half clips 44-47 held together by wire filaments 52, 54. To prevent the clips sliding together under the fence P B as tension is applied to the bushes cross pins 60, 62 are inserted in keyways 56, 58 of the clips 36, 38 and are held spaced apart by a core piece 65 which comprises non-deformable laminations 66, preferably coated with a low friction material, mounted on a rod 70 which passes through the pins 60, 62 and is held in position by enlarged ends 72, 74. As the laminations 66 can rotate relative to each other the coupling has a very low torsional stiffness. |
