US 4,732,492 AGranted

Bearing ring for supporting items on solid or hollow cylindrical parts

AssigneeS.F.E.N.A.

InventorGeorges Bonfils

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Abstract

The cylinder may be an aircraft landing gear axle. The items may be pick-ups the sense axle deformation. A ring (30) for supporting the pick-ups is made of highly resilient material. It is initially of such a size that its cylinder-engaging surface overlaps the cylindrical surface it is to engage. The ring is then deformed by urging at least two points (34 to 37) around its circumference to increase the degree of overlap. While maintaining the deforming force on the ring, its cylinder-engaging surface (31) is machined so that there is no longer any overlap, and still maintaining the force, the ring is engaged with the cylinder. The force is then removed. The said points move resiliently away from the cylinder, but intermediate points are consequently resiliently urged into contact with the cylinder. The contact is smooth and progressive, thus avoiding the kind of stress concentrations that could reduce cylinder life by fatigue, etc.

Claims2

Dependent claims

In combination, a metal bearing ring and a hollow metal cylindrical part supporting said ring outside or outside said hollow metal cylindrical part, said bearing ring being formed and mounted to said hollow metal cylindrical part by the method comprising the following steps:

providing said ring of highly resilient metal having a cylinder-engaging surface of a diameter that overlaps the diameter of the corresponding ring-engaging surface of said cylindrical metal part;
applying localized forces to at least two circumferentially spaced points on the ring to locally, elastically deform the ring such that said overlap increases at said points and wherein said overlap decreases at other circumferentially spaced points intermediate said at least two circumferentially spaced points;
machining the deformed cylindrical part-engaging surface of the ring while applying said localized forces thereto during and after said machining, so that there is no overlap between the diameter thereof and the diameter of the corresponding ring-engaging surface of said cylindrical part;
engaging the machined metal ring against the metal cylindrical part while still applying said localized forces thereto;
and
removing the applied forces;
such that before machining, a first set of exterior forces produces a series of elastic deformations at certain points within said ring and a series of reverse elastic deformations at said other points, and after machining and after assembly, a second set of internal forces within said ring produces a series of elastic deformations at said other circumferential points defining on said surface of said ring abutting said hollow metal cylindrical part low amplitude corrugations which press resiliently against said hollow metal cylindrical part at said other points without stress concentrations at said other points leading to an attendant fatigue damage to said metal bearing ring and metal cylindrical part assembly thereby insuring the deformation holding of the metal bearing ring and hollow metal cylindrical part assembly.

4 more elements

In combination, a metal bearing ring and a solid metal cylindrical part supporting said ring outside said solid metal cylindrical part, said bearing ring being formed and mounted to said solid metal cylindrical part by the method comprising the following steps:

providing said ring of highly resilient metal having a cylinder-engaging surface of a diameter that overlaps the diameter of the corresponding ring-engaging surface of said cylindrical metal;
applying localized forces to at least two circumferentially spaced points on the ring to locally, elastically deform the ring such that said overlap increases at said points, and wherein said overlap decreases at other circumferentially spaced points intermediate said at least two circumferentially spaced points;
machining the deformed cylindrical part-engaging surface of the ring while applying said localized force thereto during and after said machining, so that there is no overlap between the diameter thereof and the diameter of the corresponding ring-engaging surface of said cylindrical part;
engaging the machined metal ring against the metal cylindrical part while still applying said localized forces thereto;
and removing the applied forces;
such that before machining, a first set of exterior forces produces a series of elastic deformations at certain points within said ring and a series of reverse elastic deformations at said other points, and after machining and after assembly, a second set of internal forces within said ring produces a series of elastic deformations at said other circumferential points, defining on said surface of said ring abutting said hollow metal cylindrical part low amplitude corrugations which press resiliently against said hollow metal cylindrical part at said other points without stress concentrations at said other points leading to an attendant fatigue damage to said metal bearing ring and metal cylindrical part assembly thereby insuring the deformation holding of the metal bearing ring and solid metal cylindrical part assembly.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/857,269Filed 30 Apr 1986 · division
Priority: FR 83 0710829 Apr 1983
Granted: 22 Mar 1988
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

G01G 19/07
For weighing wheeled or rolling bodies, e.g. vehicles: for weighing aircraft
B23P 11/00
Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise
B23P 15/003
Making specific metal objects by operations not covered by a single other subclass or a group in this subclass: bearings
B64D 2045/008
Aircraft indicators or protectors not otherwise provided for: devices for detecting or indicating hard landing