Guiding member in the form of a metal ring for assembly with friction and with the articulating and/or sliding capability of a shaft
AssigneeH.E.F.
InventorsPatrick VILLEMAGNE, Georges GODARD
Life of this patent
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Abstract
The bore of the ring has workings suitable to act as a grease reserve at a friction area. A self-lubricating coating layer with a low wettability is applied to the entire surface of the bore, including in the workings suitable to act as a grease reserve, such that after wearing of the layer of self-lubricating coating at the friction surface of the bore, the difference in wettability between the friction surface and the workings still having the coating layer, enables the grease to be drawn out of the workings in order to lubricate the friction area.
Claims9
1- Guidance device comprising a metal ring for assembly with friction and with capability for articulation and/or sliding of a pin, with a bore of the ring having workings suitable to act as a grease reserve at a friction area, wherein a low-wettability self-lubricating coating layer covers an entire surface of the bore, including in the workings suitable to act as a grease reserve, such that after wearing of the self-lubricating coating layer at the friction surface of the bore, a difference in wettability between the friction surface and the workings still having the coating layer draws out grease from the workings so as to lubricate the friction surface.
2- The guidance device according to claim 1, wherein the low-wettability self-lubricating coating layer is based on PTFE.
3- The guidance device according to claim 1, wherein the low-wettability self-lubricating coating layer is based on MoS2.
4- The guidance device according to claim 1, wherein the low-wettability self-lubricating coating layer is based on Graphite.
5- The guidance device according to claim 1, wherein the workings suitable to act as a grease reserves are composed of holes or cells.
6- The guidance device according to claim 1, wherein the workings suitable to act as a grease reserves are composed of grooves.
7- The guidance device according to claim 6, wherein the grooves form a grid.
8- The guidance device according to claim 6, wherein grooves form chevrons.
9- The guidance device of claim 1, wherein the workings suitable to act as grease reserves are positioned between grooves formed at each end of the bore.