Angle positioning device for distance-variable pull rod

Abstract

The invention provides an angle positioning device for a distance-variable pull rod and the angle positioning device comprises an angle adjusting rod (3), a locking mechanism and a clamp (1), whereinthe angle adjusting rod comprises a first rod (31) and a second rod (32) that are coaxial; and the end parts of the first rod (31) and the second rod (32) are rotationally connected; the locking mechanism is arranged at the joint of the first rod (31) and the second rod (32) and is used for fixing the first rod (31) and the second rod (32) after the first rod (31) and the second rod (32) rotate toa certain angle; The clamp (1) is arranged at the other ends of the first rod (31) and the second rod (32), and ear pieces at the two ends of the distance-variable pull rod are clamped by clamping part (11). According to the invention, joint bearings with handles at two ends of the distance-variable pull rod are clamped by the clamps at two ends, the relative angles of the joint bearings with handles at two ends of the distance-variable pull rod are directly ensured, so the angle positioning device has advantages of high angle precision, easy operation, suitability for different helicopters and like.

Description

technical field [0001] The invention belongs to the technical field of helicopter rotor system design, and in particular relates to an angle positioning device for a pitch-variable pull rod. Background technique [0002] Such as figure 2 As shown, the pitch-changing tie rod 5 of the automatic tilter of the helicopter rotor system is connected with the 6 lugs of the moving ring and the 7 lugs of the pitch-changing rocker arm through bolts. Confirm the 7 fork lugs of the variable pitch rocker arm. Usually, after the large cone of the rotor adjusts the length of the pitch-variable tie rod 5, it is necessary to ensure that the planes of the joint bearings at both ends of the pitch-variable tie rod are parallel to their respective mounting lugs (moving ring lugs and pitch-variable rocker lugs) at the same time, indirectly ensuring that The relative angle of the shank spherical plain bearing at both ends. [0003] The length of the distance-variable tie rod has been basically d...

AI Technical Summary

Problems solved by technology

[0004] Direct adjustment manually judges whether the planes of the joint bearings at both ends of the rod end are parallel to the lugs of their respective mounting lugs (moving ring lugs and variable pitch rocker lugs). This method is difficult to ensure the angle of the joint bearings at both ends, resulting in Collision between rod end joint bearing and mounting fork lug during helicopter flight

[0005] The existing tooling is adjusted by clamping block 8 to clamp the end face of the shank joint bearing at both ends of the pitch-variable pull rod, refer to figure 2 , to ensure that the planes of the rod end joint bearings at both ends of the pitch-variable tie rod are parallel to their respective mounting lugs (moving ring lugs and pitch-changing rocker lugs), so that they will not be affected when the length of the pitch-changing tie rod is subsequently adjusted , this method needs to design corresponding specific tooling for different helicopter models, and some helicopters have irregular shapes of the pitch-changing rocker fork ears, and the tooling is difficult to install

Images