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1. WO2020117880 - SYSTÈME ÉLECTROMAGNÉTIQUE POUR COMMANDER LE MODE DE FONCTIONNEMENT D'UN ENSEMBLE D'ACCOUPLEMENT SANS FRICTION, ET ACCOUPLEMENT ET ENSEMBLE DE COMMANDE MAGNÉTIQUE LE COMPRENANT

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

WHAT IS CLAIMED IS:

1. An electromagnetic system for controlling the operating mode of a nonfriction coupling assembly including first and second coupling members supported for a rotation relative to one another about a common axis, the first and second coupling members including coupling first and second faces, respectively, in close-spaced opposition with one another, the second coupling member having a third face spaced from the second face, the second face having a pocket, the first face having a set of locking formations and the third face having first and second spaced passages in communication with the pocket, the system comprising:

magnetic circuit components including:

a ferromagnetic or magnetic element received within the pocket in a first position and projecting outwardly from the pocket in a second position, the element controlling the operating mode of the coupling assembly,

a stationary electromagnetic source including at least one excitation coil which generates a magnetic field between poles of the source when the at least one coil is supplied with current; and

ferromagnetic or magnetic first and second inserts received and retained within the first and second spaced passages, respectively, of the second coupling member, the first and second inserts being in close-spaced opposition across first and second air gaps respectively, with the first and second poles, respectively, of the electromagnetic source, the first and second inserts being in close-spaced opposition across third and fourth air gaps, respectively, with first and second spaced portions, respectively, of the element, wherein the electromagnetic source, the inserts, the air gaps, and the element make up a closed loop path containing magnetic flux so that the element moves between the first and second positions when the at least one coil is supplied with current.

2. The system as claimed in claim 1, wherein the first and third faces are oriented to face axially in a first direction along the rotational axis and the second face is oriented to face axially in a second direction opposite the first direction along the rotational axis.

3. The system as claimed in claim 1, wherein the electromagnetic source further

includes an annular ring housing having an annular recess in which the at least one coil is located, the housing being axially symmetric about the rotational axis and wherein the magnetic field is a generally circular magnetic field.

4. The system as claimed in claim 3, wherein the housing has a generally C-shaped cross-section.

5. The system ns claimed in claim 1, wherein the element is a locking element which prevents relative rotation of the first and second coupling members with respect to each other in at least one direction about the axis.

6. The system as claimed in claim 5, wherein the locking element is an injection molded stmt.

7. The system as claimed in claim 1, further comprising a return biasing member to urge the element to a return position which corresponds to either the first position or the second position of the element.

8. The system as claimed in claim 1, wherein the first, second and third faces are generally annular and extend generally radially with respect to the axis.

9. The system as claimed in claim 1, wherein the coupling assembly is a clutch assembly and the first and second faces are clutch faces.

10. The system as claimed in claim 1 , wherein the at least one coil has a circumference and wherein the inserts comprise magnetic pole pieces which cover substantially the entire circumference of the at least one coil.

11. The system as claimed in claim 1, wherein the second coupling member is made of non-ferrous/non-magnetic material.

12. The system as claimed in claim 1, wherein a plurality of coils generate the magnetic field.

13. A coupling and magnetic control assembly comprising:

first and second coupling members supported for a rotation relative to one another about a common axis, the first and second coupling members including coupling first and second faces, respectively, in close-spaced opposition with one another, the second coupling member having a third lace spaced from the second face, the second face having a pocket, the first face having a set of locking formations and the third face having first and second spaced passages in communication with the pocket; and

magnetic circuit components including:

a ferromagnetic or magnetic element received within the pocket in a first position and projecting outwardly from the pocket in a second position, the element controlling the operating mode of the coupling assembly;

a stationary electromagnetic source including at least one excitation coil which generates a magnetic field between poles of the source when the at least one coil is supplied with current; and

ferromagnetic or magnetic first and second inserts received and retained within the first and second spaced passages, respectively, of the second coupling member, the first and second inserts being in close-spaced opposition across first and second air gaps, respectively, with the first and second poles, respectively, of the electromagnetic source, the first and second inserts being in close-spaced opposition across third and fourth air gaps, respectively, with first and second spaced portions, respectively, of the element, wherein the electromagnetic source, the inserts, the air gaps and the element make up a closed loop path containing magnetic flux so that the element moves between the first and second positions when the at least one coil is supplied with current.

14. The assembly as claimed in claim 13, wherein the first and third faces are oriented to face axially in a first direction along the rotational axis and the second face is oriented to face axially in a second direction opposite the first direction along the rotational axis.

15. The assembly as claimed in claim 13, wherein the electromagnetic source further includes an annular ring housing having an annular recess in which the coil is located, the housing being axially symmetric about the rotational axis and wherein the magnetic field is a generally circular magnetic field.

16. The assembly as claimed in claim 15, wherein the housing has a generally C-shaped cross-section.

17. The assembly as claimed in claim 13, wherein the element is a locking element which prevents relative rotation of the first and second coupling members with respect to each other in at least one direction about the axis.

18. The assembly as claimed in claim 17, wherein the locking element is an injection molded stmt.

19. The assembly as claimed in claim 17, further comprising a return biasing member to urge the element to a return position which corresponds to either the first position or the second position of the element.

20. The assembly as claimed in claim 13, wherein the first, second and third faces are generally annular and extend generally radially with respect to the rotational axis.

21. The assembly as claimed in claim 13, wherein the coupling assembly is a clutch assembly and the first and second faces are clutch faces.

22. The assembly as claimed in claim 13, wherein the at least one coil has a circumference and wherein the inserts comprise magnetic pole pieces which cover substantially the entire circumference of the at least one coil.

23. The assembly as claimed claim 13, wherein the second coupling member is made of non-ferrous/non-magpetic material.

24. The assembly as claimed in claim 13, wherein a plurality of coils generate the magnetic field.