A device for quickly removing damper bolts

Abstract

The invention provides a device for quickly disassembling the damper bolts, which can quickly disassemble the damper bolts in a small space. The technical scheme of the present invention includes: the bolt body parts of the driving bolt and the driven bolt are non-cylindrical part, polished rod part, and threaded part from top to bottom; the major diameter and pitch of the threaded part of the driving bolt and the driven bolt are the same, but In the opposite direction; the non-cylindrical part of the driving bolt passes through the driving gear, and the threaded part of the driving bolt is screwed into the first threaded hole of the clamp block, and is pushed against the upper surface of the backing plate; the non-cylindrical part of the driven bolt passes through the driven gear, from The threaded part of the moving bolt is screwed into the second threaded hole of the clamping block, and is pushed against the upper surface of the backing plate; the driving bolt and the driving gear rotate coaxially, the driving gear and the driven gear mesh for transmission, and the driven gear and the driven bolt rotate coaxially ; The driving gear and the driven gear are equal in size and shape.

Description

technical field [0001] The invention relates to the field of helicopter design tests, in particular to a device for quickly disassembling damper bolts. Background technique [0002] In the fatigue test of the central part of the main propeller hub of the helicopter, it is necessary to regularly check the use condition of the damper bolts (dimensions and tolerances, surface wear, extrusion deformation, etc.). [0003] The implementation steps are as follows: [0004] 1. Disassemble the test piece and loading fixture; [0005] 2. Take out the bolts; [0006] 3. Observe the wear state of the bolt surface; [0007] 4. Measure the external dimensions and tolerances of bolts; [0008] 5. Decide whether to replace the bolts; [0009] 6. Reinstall bolts, test pieces and fixtures. [0010] In the fatigue test, the damper lugs and the damper loading handle of the central part are hingedly connected, and the damper bolts are subjected to a large shear force, which will produce ob...

AI Technical Summary

Problems solved by technology

[0013] Both the screw-out method and the ejection method require a large operating space. The device structure of the screw-out method is complex and is only suitable for the threaded pair structure. The ejection method needs to apply force on the threaded end of the bolt.

In the fatigue test of the central part of the main propeller hub of the helicopter, due to the layout and structural characteristics of the damper lugs, the space around the threaded end of the bolt is small, and the above two methods cannot meet the requirement of regular disassembly of the damper bolt

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