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A device for locking a structure for securing a blade to the hub of a rotocraft rotor

A technology for rotors and equipment, applied in the field of equipment for locking support structures, and can solve problems such as hindering the folding of rotor blades

Active Publication Date: 2006-09-06
EUROCOPTER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] During the rotation of the rotor, especially in flight, the existence of three degrees of freedom rotation of the blades relative to the hub is necessary, but when the rotor is at rest, it forms an obstacle to the folding of the rotor blades

Method used

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  • A device for locking a structure for securing a blade to the hub of a rotocraft rotor
  • A device for locking a structure for securing a blade to the hub of a rotocraft rotor
  • A device for locking a structure for securing a blade to the hub of a rotocraft rotor

Examples

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Embodiment Construction

[0032] refer to figure 1 , the rotor 10 comprises four blades—11 to 14—each fixed to the hub 15 of the rotor via four corresponding sleeves 16 to 19.

[0033] When folded, each leaf (for example the leaf indicated by reference number 11 ) is hinged by a support (reference number 20 ) to the outer end of the corresponding sleeve rod (reference number 19 ) by means of a folding device 22 . exist figure 1 In the folded position shown, the respective longitudinal axes 11 a to 14 a of the blades 11 to 14 are substantially parallel and perpendicular to the pivot axis 21 of the rotor 10 .

[0034] Each bushing is articulated at its inner end relative to the hub plate 15 by a spherical seat (not shown in this figure) extending through one of the four compartments 23 cut into the plate 15. .

[0035] Each sleeve has a left-hand protrusion in the shape of a blade (16g to 19g respectively), and a right-hand protrusion also in the shape of a blade (16d-19d respectively).

[0036] A co...

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Abstract

A device for locking a holding structure for securing a foldable blade of a rotorcraft rotor to the hub of the rotor. The holding structure is hinged in pitch and in drag relative to the hub and the rotor includes, for the purpose of folding the blade, elements for locking the blade-holding structure in pitch and in drag, which device is remarkable in that the associated drive elements includes brake elements preventing it from turning in flight, in particular under the effect of vibration from the rotor.

Description

technical field [0001] The invention relates to a device for locking a support structure for fixing a blade to a hub of a rotorcraft rotor. [0002] The technical field of the invention is the design and manufacture of rotorcraft. [0003] The invention is particularly applicable to rotorcraft rotors equipped with foldable blades, and also to actuators for automatically deploying and folding such blades. Background technique [0004] US Patent No. 5,782,606 and French Patent No. 2,742,726 describe a blade folding device in which the root of the blade is fixed to the folding device with two rotating bearings which allow the blade to rotate relative to the end of the sleeve rod , the set of rods provides the mechanical connection between the blades and the rotor hub. The rotors disclosed in these patents consist of a plate penetrated by a plurality of compartments as if it had blades. Each bushing used to fix the blades to the hub consists of two arms forming a bifurcation ...

Claims

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Application Information

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IPC IPC(8): B64C27/50
CPCH02K7/106H02K7/1166B64C27/50
Inventor C·路易P·凯因
Owner EUROCOPTER
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