TENSIONING ROLLER DEVICE

• US 20080167150A1
• Filed: 10/02/2007
• Published: 07/10/2008
• Est. Priority Date: 10/03/2006
• Status: Active Grant

• Current Assignee: ABet SKF
• Original Assignee: ABet SKF
• Inventors: Lescorail, Romuald, Gaborel, Jean-Philippe, Varnoux, Laurent, Nwokoye, Donatus
• Granted Patent: US 7,758,459 B2
• Time in Patent Office: Days
• US Class Current: 474/109
• CPC Class Codes: F16C 13/006 Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
• CPC Class Codes: F16C 19/08 with two or more rows of balls
• CPC Class Codes: F16C 2361/63 Gears with belts and pulleys
• CPC Class Codes: F16H 2007/0806 Compression coil springs
• CPC Class Codes: F16H 2007/0872 Sliding members
• CPC Class Codes: F16H 2007/0889 Path of movement of the finally actuated member
• CPC Class Codes: F16H 55/54 of which the bearing parts are radially adjustable
• CPC Class Codes: F16H 7/08 Means for varying tension of belts, ropes, or chains pulleys of adjustable construction F16H55/52 ; gearings with endless belts F16H7/02; tensioning for chains or belts specially adapted for cycles B62M9/16; belt or chain tensioning arrangements for endless conveyors B65G23/44

Abstract

Tensioning roller device including a non-rotating part about which there is rotationally mounted a pulley-forming rotating assembly designed to collaborate with a belt or a chain and a rolling bearing positioned between the non-rotating part and the pulley and including a rotating ring, a non-rotating ring and rolling elements, the pulley including a rigid rim including a first part fixed to the rotating ring of the bearing and a second part that can move with respect to the first part under the action of an elastic element, and an expandable sleeve of annular overall shape designed to be in contact with the belt or the chain, the diameter of the expandable sleeve varying according to how hard it is pressed by the second part.

Claims

1. Tensioning roller device comprising a non-rotating part about which there is rotationally mounted a pulley-forming rotating assembly designed to collaborate with a belt or a chain and a rolling bearing positioned between the non-rotating part and the pulley and comprising a rotating ring, a non-rotating ring and rolling elements, wherein the pulley comprises a rigid rim comprising a first part fixed to the rotating ring of the bearing and a second part that can move with respect to the first part under the action of an elastic element, and an expandable sleeve of annular overall shape designed to be in contact with the belt or the chain, the diameter of the expandable sleeve varying according to how hard it is pressed by the second part.

2. Device according to claim 1, wherein the expandable sleeve can be expanded radially.

3. Device according to claim 1, wherein the sleeve has frustoconical lateral faces to match the shape of the first and second parts.

4. Device according to claim 1, wherein the sleeve is symmetric with respect to a radial plane.

5. Device according to claim 1, wherein the sleeve has an axial bore to match the shape of the first part.

6. Device according to claim 1, wherein the sleeve has substantially radial lateral faces to match the shape of the first and second parts.

7. Device according to claim 1, wherein the sleeve has a frustoconical interior face to match the shape of the first part.

8. Device according to claim 1, wherein the second part is in the form of a cup mounted with the ability to move in axial translation on the first part.

9. Device according to claim 1, wherein the elastic element comprises a spring positioned between the second part and a bearing surface secured to the first part.

10. Device according to claim 1, wherein the expandable sleeve is in one piece.