Wheel with eddy current magnetic braking device and aircraft landing gear provided with such a wheel

Patent metadata

Field	Value
Publication number	US-12463501-B2
Application number	US-202218565269-A
Country	US
Kind code	B2
Filing date	May 25, 2022
Priority date	May 31, 2021
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

A wheel including a rim that rotates on a shaft defining a primary rotational axis and a magnetic braking device. The magnetic braking device includes an actuator which includes a first transmission assembly and one second transmission assembly each includes a pinion mounted on the support to pivot about a secondary rotational axis parallel to the primary axis, an operating bar extending about the secondary axis, a first mechanical connecting member connecting the operating bar to the pinion of the transmission assembly and a second mechanical connecting member connecting the operating bar to one of the stators, and the mechanical connecting members are arranged. The rotation of the pinions causes a movement of the stators parallel to the secondary axis in opposite directions, for varying the air gap, one or more of the mechanical connecting members of each transmission assembly being arranged to ensure a screw-nut helical connection.

First claim

The invention claimed is:

1 . A wheel comprising a rim mounted to rotate on a support comprising:
a shaft defining a primary rotational axis, and an eddy current magnetic braking device comprising at least one first braking set comprising a first stator and a second stator which are connected to the support and a rotor connected to the rim and disposed between the stators, such that each stator has a first face opposite a face of the rotor and separated from said face by an air gap, the rotor being made of electrically conductive material and the stators carrying a plurality of magnets emitting via the first face, a magnetic flux capable of causing, in accordance with the air gap, eddy currents in the rotor when the rotor pivots with the wheel, wherein the eddy current magnetic braking device comprising comprises an actuator which comprises at least one first transmission assembly and one second transmission assembly each comprising a pinion mounted on the support to pivot about a secondary rotational axis parallel to the primary axis, an operating bar extending about the secondary axis, a first mechanical connecting member connecting the operating bar to the pinion of the transmission assembly in question and at least one second mechanical connecting member connecting the operating bar to one of the stators; and in that the mechanical connecting members are arranged, such that the rotation of the pinions causes a movement of the stators parallel to the secondary axis in opposite directions, for varying the air gap, at least one of the mechanical connecting members of each transmission assembly being arranged to ensure a screw-nut helical connection.

2 . The wheel according to claim 1 , wherein the first transmission assembly is linked to the first stator and the second transmission assembly is linked to the second stator; the operating bar of each transmission assembly is mounted on the support to be rotatably stationary and to slide about the secondary axis, the first mechanical connecting member ensures the helical connection and the second mechanical connecting member is arranged to link the operating bar and the stator in question in translation about the secondary axis, such that the rotation of the pinion of each transmission assembly causes the translation of the operating bar and of the stator in question about the secondary axis, the helical connection of the first transmission assembly and the helical connection of the second transmission assembly having opposite directions.

3 . The wheel according to claim 2 , wherein the second mechanical connecting member comprises two abutments integral with the operating bar and flanking a portion of the stator in question to drive the stator related with the operating bar.

4 . The wheel according to claim 2 , comprising two braking sets, each comprising a first stator and a second stator flanking the rotor; wherein the first transmission assembly comprises two second mechanical connecting members connecting the operating bar to the two first stators and the second transmission assembly comprises two second mechanical connecting members connecting the operating bar to the two second stators.

5 . The wheel according to claim 1 , wherein the operating bars are mounted on the support to be stationary in translation and rotatably free about the secondary axis, the first mechanical connecting member is arranged to rotatably connect the pinion and the operating bar of the transmission assembly related and the second mechanical connecting member of each operating bar of each transmission assembly ensures the helical connection with the stator, such that the rotation of the pinion and of the operating bar of each transmission assembly drives a translation of the stator about the secondary axis, the helical connection of the first stator and the helical connection of the second stator having opposite directions.

6 . The wheel according to claim 5 , wherein the first mechanical connecting member of each transmission assembly comprises a flush-mounting of the pinion on the operating bar of the transmission assembly related.

7 . The wheel according to claim 5 , comprising two braking sets each comprising a first stator and a second stator-flanking the rotor; wherein each transmission assembly comprises two mechanical connecting members connecting the operating bar to the two first stators and to the two second stators.

8 . The wheel according to claim 1 , wherein the eddy current magnetic braking device comprises a common drive crown having an inner gearing meshing with the pinion of each transmission assembly.

9 . The wheel according to claim 8 , wherein at least one drive pinion is rotatably mounted on the support to mesh with the inner gearing of the drive motor crown.

10 . The wheel according to claim 1 , wherein the eddy current magnetic braking device comprises two common drive crowns, coaxial to one another, one meshing with the pinion of the first transmission assemblies and the other meshing with the pinion of the second transmission assemblies.

11 . The wheel according to claim 1 , wherein the eddy current magnetic braking device comprises a drive pinion meshing with the pinion of the second transmission assembly which itself meshes with the pinion of the first transmission assembly.

12 . The wheel according to claim 1 , wherein the magnets are disposed, such that the stators are mutually attracted.

13 . The wheel according to claim 12 , wherein the rotor has a thickness, such that a skin effect is caused from each face of the rotor over more than half of the thickness of the rotor at least over a range of possible relative speeds of the rotor with respect to the stators.

14 . A landing gear comprising a strut having an end carrying a shaft on which is mounted the hub of at least one of the wheel according to claim 1 .

15 . An aircraft provided with at least one of the landing gear according to claim 14 .

Assignees

• Safran Landing Systems

Inventors

• Pascal Vincent
• Senechal Yannick
• Klim Graeme

Classifications

• H02K7/106

  with dynamo-electric brakes · CPC title

• B64C25/42

  Arrangement or adaptation of brakes · CPC title

• B60L2200/10

  Air crafts · CPC title

• B60L7/28

  Eddy-current braking · CPC title

• B60T8/325

  Systems specially adapted for aircraft · CPC title