Spherical plain bearing with inner sleeve

Patent metadata

Field	Value
Publication number	US-2016003293-A1
Application number	US-201514755112-A
Country	US
Kind code	A1
Filing date	Jun 30, 2015
Priority date	Jul 1, 2014
Publication date	Jan 7, 2016
Grant date	—

Abstract

A spherical plain bearing comprising an inner ring provided with a spherical outer surface and with lateral surfaces, an outer ring provided with a corresponding spherical inner surface mounted on the outer surface, and a sleeve mounted into a bore of the inner ring. The inner ring comprises at least three part rings which are mounted in contact in the circumferential direction one relative to another. At least one protrusion is provided on an outer surface of the sleeve and extends into a groove formed on the bore of the inner ring. The sleeve leaves the lateral surfaces free of the inner ring.

First claim

1 . A spherical plain bearing comprising:
an inner ring provided with a spherical outer surface and with lateral surfaces; an outer ring provided with a corresponding spherical inner surface mounted on the outer surface, and a sleeve mounted into a bore of the inner ring; the inner ring comprising at least three part rings which are mounted in contact in the circumferential direction one relative to another; at least one protrusion being provided on at least one of:
(a) an outer surface of a sleeve and extending into a groove formed on the bore of the inner ring, and
(b) the bore and extending into a groove formed on the outer surface,
wherein the sleeve leaves the lateral surfaces free of the inner ring.

2 . The spherical plain bearing according to claim 1 , further comprising a radial gap provided between the protrusion and a bottom of the associated groove.

3 . The spherical plain bearing according to claim 1 , wherein the protrusion extends radially.

4 . The spherical plain bearing according to claim 1 , wherein the protrusion comprises sloped frontal surfaces engaging with corresponding sloped sidewalls of the associated groove.

5 . The spherical plain bearing according to claim 1 , comprising only one protrusion.

6 . The spherical plain bearing according to claim 5 , wherein the protrusion is located in a radial plane passing through the centre of the inner ring.

7 . The spherical plain bearing according to claim 1 , wherein at least one part ring of the inner ring comprises chamfers formed about at least at one end of its bore.

8 . The spherical plain bearing according to claim 1 , wherein the part rings of the inner ring are identical one to another.

9 . The spherical plain bearing according to claim 1 , wherein at least one of the part rings of the inner ring has a reduced length in the circumferential direction with regard to the other part rings.

10 . The spherical plain bearing according to claim 1 , wherein the inner ring is made from a material having a density smaller than the one of the material of the sleeve.

11 . The spherical plain bearing according to claim 1 , wherein the sleeve is made from bronze.

12 . The spherical plain bearing according to a claim 1 , wherein the inner ring is made from titanium.

13 . The spherical plain bearing according to claim 1 , wherein at least one of the inner and outer surfaces of the rings is coated with at least one of an antifriction and a wear resistance coating.

Assignees

• Blachon Yvan
• Turmeau Arnaud
• Skf Aerospace France Sas

Inventors

• Blachon Yvan
• Turmeau Arnaud

Classifications

• F16C33/043

  Sliding surface consisting mainly of ceramics, cermets or hard carbon, e.g. diamond like carbon [DLC] · CPC title

• F16C33/046

  divided or split, e.g. half-bearings or rolled sleeves · CPC title

• F16C23/046 Primary

  with split outer rings · CPC title

• F16C2240/60

  Thickness, e.g. thickness of coatings · CPC title

• F16C2223/60

  by vapour deposition, e.g. PVD, CVD · CPC title