Angle positioning device for distance-variable pull rod

A technology of angle positioning and variable pitch rods, which is applied in transportation and packaging, aircraft parts, propellers, etc. It can solve the problems of difficult installation of tooling, bumps, and difficulty in ensuring the angle of joint bearings at both ends, etc., to achieve easy operation and high angle accuracy Effect

CN109533290AActive Publication Date: 2019-03-29CHINA HELICOPTER RES & DEV INST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-03-29

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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.
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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...

Examples

Embodiment Construction

[0030] In order to make the objectives, technical solutions and advantages of the implementation of the application clearer, the technical solutions in the implementation modes of the application will be described in more detail below with reference to the drawings in the implementation modes of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the present application. The embodiments described below by referring to the figures are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. Based on the implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the scope of protection of this application. Embodiments of the pr...