Assembly comprising an articulation spindle supported by a clevis and immobilized in translation by a blocking device integrating a double anti-rotation system

Patent metadata

Field	Value
Publication number	US-9828103-B2
Application number	US-201414553416-A
Country	US
Kind code	B2
Filing date	Nov 25, 2014
Priority date	Dec 12, 2013
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

An assembly having an articulation spindle mounted in a first sleeve inserted into a first arm of a clevis and in a second sleeve inserted into a second arm of said clevis said assembly comprising a blocking device. The blocking device comprising a screw with a first cylindrical portion which is screwed into an extension of the second sleeve and against which the second end of the articulation spindle can come to press, and a second portion, in the extension of the first portion, with a smaller cross section than said first cylindrical portion, a locking washer which is interposed between the second portion of the screw and the extension of the second sleeve in a locked position, and a longilinear element which passes through the screw and the second sleeve in a locked state.

First claim

The invention claimed is:

1. An assembly comprising:
an articulation spindle mounted in a first sleeve inserted into a first arm of a clevis and in a second sleeve inserted into a second arm of said clevis,
said first sleeve comprising an inner shoulder which projects toward the inside of said first sleeve and acts as a stop for a first end of said articulation spindle,
a blocking device acting as a stop for a second end of said articulation spindle,
said blocking device comprising a screw which is screwed into an extension of the second sleeve and a longilinear element which is configured to immobilize the screw and the second sleeve in rotation with respect to one another when said longilinear element passes through the screw and the second sleeve,
the screw comprising a first cylindrical portion configured to be screwed into the extension and terminating in a face that bears against and acts as a stop for the second end of the articulation spindle, and a second portion, in the extension of the first portion, with a smaller cross section than a cross-section of said first cylindrical portion, wherein the second portion extends beyond the extension when the longilinear element passes through the screw and the second sleeve, and
the blocking device comprising a locking washer which comprises a circumference having shapes which are complementary with a shape of the extension to allow the locking washer to move in translation in the extension and to prevent the locking washer from rotating with respect to the extension in a locked position of the locking washer, and wherein the shapes of the circumference of the locking washer comprise at least one spur which projects with respect to the circumference and which extends in the same place as the locking washer, and wherein the shape of the extension comprises at least one notch configured so as to receive a spur of the locking washer, and wherein the locking washer further comprises an orifice having a shape which is complementary with a shape of the second portion of the screw so as to allow the locking washer to move in translation on the second portion of the screw and to prevent the locking washer from rotating with respect to the screw in the locked position of the locking washer,
and wherein the locking washer is configured to immobilize the screw in rotation with respect to said extension when the locking washer is interposed between the second portion of the screw and the extension of the second sleeve.

2. The assembly as claimed in claim 1 , wherein the locking washer comprises two spurs which are diametrically opposite one another, and wherein the extension comprises multiple pairs of notches, the notches of each pair being diametrically opposite one another.

3. The assembly as claimed in claim 1 , wherein the second portion of the screw is of hexagonal cross section.

4. The assembly as claimed in claim 3 , wherein the orifice of the locking washer has a polygonal perimeter, with the number of sides being a multiple of six.

5. The assembly as claimed in claim 1 , wherein the blocking device comprises means for holding the locking washer in the locked position.

6. The assembly as claimed in claim 5 , wherein the screw comprises an outer shoulder and wherein the means for holding the locking washer in the locked position comprise a circlip which is housed in a channel created in the second portion of the screw, said channel having a width equal to the thickness of the locking washer plus a functional clearance.

7. The assembly as claimed in claim 1 , wherein the screw comprises multiple through passages which extend in a plane transverse to the screw across several diameters, each passage being able to house the longilinear element.

8. The assembly as claimed in claim 1 , wherein the extension comprises multiple pairs of orifices distributed over its circumference, each pair of orifices being able to house the longilinear element.

9. An assembly comprising:
an articulation spindle mounted in a first sleeve inserted into a first arm of a clevis and in a second sleeve inserted into a second arm of said clevis,
said first sleeve comprising an inner shoulder projecting toward an inside of said first sleeve and acting as a stop for a first end of said articulation spindle,
a screw comprising a first portion, a second portion, and a third portion, the first portion configured to be screwed into an extension of the second sleeve and terminating in a face that bears against and act as a stop for the second end of the articulation spindle, the first portion being cylindrical, the second portion comprising a polygonal cross section smaller than a cross-section of the first cylindrical portion, wherein the second portion is disposed between the first and third portions, and, the third portion extending out of the extension, being cylindrical with a knurled surface, and having a smaller cross section than a cross-section of the first cylindrical portion,
a longilinear element which is configured to immobilize the screw and the second sleeve in rotation with respect to one another when said longilinear element passes through the second portion of the screw and the second sleeve, and
a locking washer comprising at least one spur configured to be received by at least one notch in the extension, the locking washer further comprising an orifice having a complementary shape to the polygonal cross section of the second portion of the screw, and,
wherein when the locking washer is interposed between the second portion of the screw and the extension of the second sleeve, the at least one spur is received in the at least one notch in the extension and the orifice engages the polygonal cross section of the second portion of the screw such that the screw is immobilized in rotation with respect to the extension.

10. The assembly of claim 9 wherein the second portion of the screw has a hexagonal outer surface.

11. The assembly of claim 9 wherein the second portion includes an outer surface and a channel in the outer surface and further comprising a circlip configured to be inserted into the channel in the outer surface of the second portion of the screw.

12. The assembly of claim 9 wherein the locking washer includes a plurality of spurs and wherein the second sleeve includes a plurality of notches configured to house a spur from the plurality of spurs.

13. The assembly of claim 9 wherein the orifice of the locking washer comprises a polygonal perimeter, wherein a number of sides of the polygonal perimeter is greater than a number of sides of the polygonal cross section of the second portion of the screw.

Assignees

• Airbus Operations Sas

Inventors

• Cassagne Jerome
• Deforet Thomas

Classifications

• B64D27/402

  comprising box like supporting frames, e.g. pylons or arrangements for embracing the power plant · CPC title

• F16B39/10 Primary

  by a plate, {spring, wire} or ring immovable with regard to the bolt or object {and mainly perpendicular to the axis of the bolt}(F16B39/08 takes precedence) · CPC title

• Y10T403/32041

  Universal · CPC title

• B64D2027/262

  Operations & Transport · mapped topic

• B64D27/26 Primary

  Operations & Transport · mapped topic