QUICK RELEASE BOLT FOR ATTACHING HELICOPTER BLADES Russian patent published in 2024 - IPC B64C27/48 F16B21/08 

FIELD: aviation.

SUBSTANCE: quick-release bolt for attaching a helicopter blade comprises a rod, in the upper part of which there is a hole perpendicular to the longitudinal axis of the rod, into which an axle is inserted, the ends of which are inserted into the eyes of a handle made in the form of an L-shaped lever. The handle lugs are made in the form of round cams with an offset axis of the holes. A locking plate in the form of an L-shaped lever is attached to the handle at one end. On the rod under the round cams there is a freely placed support plate with which the cams are in contact; on the rod from the side of its free end there is a support washer, tightened by an adjusting nut. Between the support plate and the support washer, two groups of rings are placed on the rod, in the first of which the rings cover the rod and have a triangular outer surface. In the second group, the rings are split and elastic in the radial direction. The hole axis of each round cam is offset along a line passing through the centre of that hole and a point or line on the outer contact surface of the round cam.

EFFECT: simplified design providing the ability to quickly secure the blade and quickly unfasten it.

1 cl, 2 dwg