Helicopters can take off and land vertically, hover in mid-air and fly at low altitude and low speed, and these unique features make helicopters play an indispensable role in transportation, disaster relief and rescue, and national defence and security. Engine system, rotor system and transmission system are the three main systems of a typical helicopter. The helicopter transmission system includes the main reducer, horizontal drive shaft, oblique drive shaft, intermediate reducer and tail reducer and other parts. The role of the tail drive shaft system is to transmit the power output from the main reducer to the tail rotor, the performance of the helicopter tail drive shaft has a critical impact on the performance of the entire helicopter.

The tail transmission system consists of tail horizontal shaft system, intermediate reducer, tail swashplate and tail reducer. The tail drive shaft system has a long span, and the shaft segments are connected together by couplings, which is a typical multi-pivot drive shaft system with outstanding vibration problems. If the vibration is not properly suppressed, it is easy to cause overload or make the drive shaft system and other parts of the collision, making the shaft system movement instability, serious or lead to catastrophic accidents.

The elastic bushing is connected to the input magazine and rear bushing through the interface at both ends, which plays an important role in the design of the power output shaft of the helicopter, and can provide vibration damping, protection and support to ensure the efficiency and reliability of power transmission. In terms of material selection, the elastic bushing usually adopts high-strength rubber or metal spring and other high-quality materials, which not only have excellent flexibility and durability, but also can adapt to a variety of complex working environment. The elastic bushing also has excellent vibration damping performance, it can effectively absorb the shock and load caused by rotation and vibration, so that the helicopter is more stable and comfortable in flight. Its excellent corrosion resistance and sealing performance. It can resist the erosion of various corrosive substances, effectively prevent the leakage of pollutants and lubricants from the external environment, protect the power output shaft from aggression, and ensure long-term stable performance.