Guide cylinder-free automatic inclinator of unmanned helicopter

Abstract

The invention belongs to the design of a helicopter automatic inclinator, and in particular relates to a guide cylinder-free automatic inclinator which is an important part of a light unmanned helicopter rotor system. The guide cylinder-free automatic inclinator of the unmanned helicopter is characterized by comprising moving rings (1), a fixed ring (2), variable pitch pull rod components (3), torque arm components (4), a snap ring (5), an anti-torque arm component (6) and spherical hinge components (8). According to a set of the guide cylinder-free automatic inclinator provided by the invention, the spherical hinge components and self-lubricating bushings of special structures are selected to reduce the design of high-cost parts of guide cylinders, wear-resistant bushings and the like, and the guide cylinder-free automatic inclinator has the advantages of simple structure, light weight, convenience in use and maintenance and the like. Clever part tolerance design is adopted, so that the use of wear-resistant washers at part assembling interfaces is canceled to control transverse gaps of the assembling interfaces between the torque arm parts and the anti-torque arm parts to effectively improve the reliability and prolong the fatigue life of the whole automatic inclinator and lower the design and manufacture costs.

Description

[0001] Technical field: [0002] The invention belongs to the design of an automatic tilter for a helicopter, in particular to a cylinder-free automatic tilter, which is an important component of a light unmanned helicopter rotor system. [0003] Background technique: [0004] The automatic recliner is mainly composed of a moving ring and a fixed ring assembly, a variable pitch rod assembly, a torque arm anti-twist arm assembly and a connector assembly. The moving ring and the stationary ring are connected by grease-lubricated four-point angular contact ball bearings, and the ball joint assembly integrated with the stationary ring assembly is directly set on the guide cylinder of the main rotor shaft. The movement realizes the collective distance control, and realizes the period variable pitch control through the tilting movement of the fixed ring component around the spherical joint component. In addition, in order to protect the load-bearing bolts on the torque arm anti-tors...

AI Technical Summary

Problems solved by technology

[0005] The traditional automatic tilter ball joint assembly is integrated with the fixed ring assembly, and the design of the guide cylinder on the main rotor shaft is added, which not only increases the weight of the entire automatic tilter, but also has poor reliability and maintainability. Helicopter design and manufacturing costs

In addition, the wear-resistant straight bushes, wear-resistant shoulder bushes and wear-resistant washers in the bolt holes of the torque arm anti-twist arm are relatively expensive, and the number of parts is large, and maintenance is inconvenient

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