Rolling bearing creep prevention device

• US 5,785,433 A
• Filed: 07/07/1997
• Issued: 07/28/1998
• Est. Priority Date: 07/17/1996
• Status: Expired due to Term

• Current Assignee: NSK Limited
• Original Assignee: NSK Limited
• Inventors: Takahashi, Masahiro, Goto, Koichi
• Primary Examiner(s): Footland, Lenard A.
• Application Number:
  US08/895,892
• Time in Patent Office: 386 Days
• Field of Search: 384/539, 384/537, 384/903, 384/255, 384/585
• US Class Current: 384/539
• CPC Class Codes: F16C 19/06 with a single row or balls
• CPC Class Codes: F16C 19/08 with two or more rows of balls
• CPC Class Codes: F16C 2226/10 Force connections, e.g. clamping shrinkage connections, force fits, friction grips in general F16B4/00, for rigidly connecting coaxial parts F16D1/00
• CPC Class Codes: F16C 2360/44 Centrifugal pumps in general F04D
• CPC Class Codes: F16C 2380/26 Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators in general H02K
• CPC Class Codes: F16C 35/067 Fixing them in a housing with interposition of an element F16C35/07
• CPC Class Codes: Y10S 384/903 Retaining ring

Abstract

An eccentric groove 10 is formed in an outer peripheral surface of an outer ring 5 and an outer peripheral surface of an eccentric ring 1a shaped like a segmentary ring is engaged with an inner peripheral surface of a housing 3 by friction. An elastic deformation part having a predetermined length dimension in the circumferential direction is formed in a part of the eccentric ring 1a. The elastic deformation part projects between a bottom face 11 of the eccentric groove 10 and the inner peripheral surface of the housing 3 in the mounting state in the housing 3. Resultantly, the rotation prevention effect of the outer ring 5 with respect to the housing 3 is improved.

Claims

1. A rolling bearing creep prevention device for a rolling bearing (4, 4a) built in a cylindrical inner peripheral surface of a housing (3) and provided with an outer ring (5, 5a) having an outer peripheral surface on which an eccentric groove (10, 10a) is formed in such a manner that said eccentric groove is recessed from the outer peripheral surface and that a center axis of a bottom face of said eccentric groove is made eccentric with respect to a center axis of said outer ring, comprising:

a C-shaped eccentric ring (1, 1a) fitted to an inside of said eccentric groove (10, 10a) and fittingly inserted to the inner peripheral surface of said housing (3), the center axes of an inner peripheral surface and an outer peripheral surface of said eccentric ring being made eccentric with each other,

wherein an elastic deformation part (2, 2a) projecting outward in a diameter direction of said eccentric ring is formed in a part of said eccentric ring.

2. A rolling bearing creep prevention device according to claim 1, in which said elastic deformation part (2a) is formed into an arc-shape which is concentric with the outer peripheral surface of said eccentric ring and has a predetermined length in a circumferential direction so as to uniformly abut the inner peripheral surface of said housing over the full length thereof.

3. A rolling bearing creep prevention device according to claim 2, in which a protrusion (18) projecting diametrically outward is formed on said eccentric ring (1, 1a).

4. A rolling bearing creep prevention device according to claim 3, wherein said protrusion (18) is provided with a slope surface inclined in the axial direction of the rolling bearing.

5. A rolling bearing creep prevention device according to claim 2, in which a protrusion (18) projecting diametrically outward is formed in an intermediate part of said elastic deformation part in the circumferential direction.

6. A rolling bearing creep prevention device according to claim 5, wherein said protrusion (18) is provided with a slope surface inclined in the axial direction of the rolling bearing.

7. A rolling bearing creep prevention device according to claim 1, wherein said eccentric ring is made of a synthetic resin having elasticity.

8. A rolling bearing creep prevention device according to claim 1, in which a protrusion (18) projecting diametrically outward is formed on said eccentric ring (1, 1a).

9. A rolling bearing creep prevention device according to claim 8, wherein said protrusion (18) is provided with a slope surface inclined in the axial direction of the rolling bearing.

10. A rolling bearing creep prevention device according to claim 1, in which a protrusion (18) projecting diametrically outward is formed in an intermediate part of said elastic deformation part in the circumferential direction.

11. A rolling bearing creep prevention device according to claim 10, wherein said protrusion (18) is provided with a slope surface inclined in the axial direction of the rolling bearing.