FREEWHEEL BEARING DEVICE WITH TORQUE LIMITER

• US 20100219038A1
• Filed: 05/12/2010
• Published: 09/02/2010
• Est. Priority Date: 07/28/2003
• Status: Active Grant

• Current Assignee: Skf France (ABet SKF)
• Original Assignee: Skf France (ABet SKF)
• Inventors: Poulle, Thierry, Hamada, Virginie, Lescorail, Romuald, Ponson, Frédéric, Caillault, Claude
• Granted Patent: US 8,123,013 B2
• Time in Patent Office: Days
• US Class Current: 192/41.R
• CPC Class Codes: F16C 19/06 with a single row or balls
• CPC Class Codes: F16C 41/001 Integrated brakes or clutches for stopping or coupling the relatively movable parts
• CPC Class Codes: F16D 41/07 between two cylindrical surfaces
• CPC Class Codes: F16D 41/206 having axially adjacent coils, e.g. helical wrap-springs
• CPC Class Codes: F16D 43/211 with radially applied torque-limiting friction surfaces
• CPC Class Codes: F16D 7/021 with radially applied torque-limiting friction surfaces F16D7/022 takes precedence

Abstract

The invention concerns a freewheel bearing device including an outer element and inner element arranged inside the outer element, and a free wheel provided with at least a wedging element, arranged between the inner element and the outer element to allow a free rotational movement in one direction between the outer element and the inner element and for transmission of a torque in the other direction between the outer element and the inner element, the free wheel including a ring provided with a cylindrical inner surface and a cylindrical outer surface, substantially aligned on a radial plane perpendicular to the axis of rotation of the device, and a torque limiting member adapted to limit the torque transmitted by the free wheel, the torque limiting member being arranged radially between said ring and the outer element or the inner element in contact with said ring and said element.

Claims

1-22. -22. (canceled)

23. A freewheel bearing device comprising:

an outer element;

an inner element placed in the outer element;

a rolling bearing; and

a freewheel, the rolling bearing and the freewheel being mounted adjacent between the inner element and the outer element to leave free a rotation movement in one direction and to transmit a torque in the other direction between the outer element and the inner element; and

a torque limiter member capable of limiting the torque transmitted by the freewheel, the torque limiter member being placed radially between the freewheel and the outer element, wherein the torque limiter member comprises a friction element prestressed against the outer element and/or the freewheel.

24. The device of claim 23, wherein the freewheel comprises at least one jamming element, wherein the at least one jamming element is mounted between the inner element and a first cylindrical surface of a race of the freewheel.

25. The device of claim 24, wherein the torque limiter member is placed radially on a second cylindrical surface of the race of the freewheel, between the race and the outer element, and wherein the torque limiter member comprises two friction rings prestressed in opposite directions from each other.

26. The device of claim 24, wherein the torque limiter member is placed radially on a second cylindrical surface of the race of the freewheel, between the race and the outer element, and wherein the torque limiter member comprises a first friction ring in contact with a surface of the outer element, a second friction ring coupled to the freewheel, and a prestressing element placed between the first friction ring and the second friction ring.

27. The device of claim 23, wherein the friction element is in contact with a race of the rolling bearing.

28. The device of claim 23, wherein the friction element is prestressed against the outer element.

29. The device of claim 23, wherein the friction element is prestressed against the outer element and the freewheel.

30. The device of claim 23, wherein the torque limiter member is mounted in series with the freewheel to limit the torque transmitted by the unidirectional engagement member in the torque transmission position.

31. The device of claim 23, wherein raceways for the rolling elements of the bearing are arranged in the inner and outer elements.

32. The device of claim 23, wherein the freewheel comprises a spring provided with an end fixedly attached to the torque limiter member and coils in friction contact on the inner or outer element.