RING FOR A DRIVE UNIT BEARING OF A MARINE VEHICLE INCLUDING A SEGMENTED ACTIVE PART

1 . A ring for a shaft bearing of a marine vehicle drive unit, comprising an annular body, a cylindrical active part designed to ensure a sliding contact function with another ring of the shaft bearing, wherein the active cylindrical part is segmented into several cylindrical surfaces, each cylindrical surface being attached in a removable manner to the annular body.

2 . The ring according to claim 1 , wherein the annular body is segmented in several retractable annular modules, each annular module having a cylindrical surface as part of the active cylindrical part.

3 . The ring according to claim 2 , wherein each annular module is mobile compared to others in drive according to an axial direction to the ring.

4 . The ring according to claim 2 , wherein each annular module has a support and a radial buffer, the radial buffer including the cylindrical surface, the radial buffer can be detached from the support.

5 . The ring according claim 2 , with a cylindrical frame including, for each annular module, two rods directed according to an axial direction to the ring, each annular module including two through holes, each rod being inserted in a through hole of the associated annular module so that it can slide inside of it.

6 . The ring according to claim 2 , wherein all of the annular modules extend between two circle arcs underpinned by the same center angle.

7 . The ring according to claim 6 , wherein the center angle is between about 20° and about 40°.

8 . The ring according to claim 1 , with an active frontal part intended to provide a sliding contact function with an axial stop of the shaft bearing, the frontal active part being segmented into several frontal surfaces, each frontal surface being fixed in a removable manner to the annular body.

9 . The ring according to claim 8 , wherein the annular body is segmented in several retractable annular modules, each annular module having a frontal surface, the frontal surface being a part of the frontal active part.

10 . The ring according to claim 8 , wherein each annular module is mobile between a position in which such annular module is axially located on one side of the active frontal side and a position in which such annular module is axially located across the active frontal part.

11 . The ring according to claim 8 , in which each annular module includes support and an axial support, the axial buffer including the frontal surface, the axial buffer can be detached from the support

12 . The ring according to claim 8 , with a second frontal active part to ensure a function of the sliding contact with a second axial stop of the shaft bearing, the active cylindrical part axially located between the frontal active parts.

13 . A shaft bearing designed to be mounted on a shaft of a water vehicle drive unit, comprising an inner ring and an outer ring, at least one of the inner and outer rings being a ring according to claim 1 .

14 . The shaft bearing according to claim 13 , including a first axial stop and a second axial stop the first axial stop being mobile according to an axial direction of the bearing, the first axial stop comprising a first frontal active part providing a sliding contact function with the inner ring, the inner ring including a second frontal active part providing a sliding contact function with the second axial stop.

15 . Use of a bearing according to claim 13 for the disassembly of a surface forming an active part of such a bearing.