Bearing apparatus

• US 8,459,875 B2
• Filed: 10/09/2012
• Issued: 06/11/2013
• Est. Priority Date: 12/05/2007
• Status: Active Grant

• Current Assignee: Jtekt Corporation (Toyota Motor Corporation)
• Original Assignee: Jtekt Corporation (Toyota Motor Corporation)
• Inventors: Otsuka, Katsunori
• Primary Examiner(s): Johnson, Phillip A
• Application Number:
  US13/648,198
• Publication Number:
  US 20130028550A1
• Time in Patent Office: 245 Days
• Field of Search: 384/447, 384/537, 384/538, 384/539, 384/584, 384/585, 384/617, 384/907
• US Class Current: 384/537
• CPC Class Codes: F16C 19/06 with a single row or balls
• CPC Class Codes: F16C 2226/50 Positive connections
• CPC Class Codes: F16C 25/083 with resilient means acting axially on a race ring to preload the bearing
• CPC Class Codes: F16C 35/067 Fixing them in a housing with interposition of an element F16C35/07
• CPC Class Codes: F16C 35/077 between housing and outer race ring

Abstract

A bearing apparatus to be supported by an axle box which includes a key groove, the bearing apparatus includes an outer ring which includes a first key groove extending from an inner diameter to an outer diameter of an axial end surface of the outer ring, an inner ring, rolling elements rollably interposed between the outer and inner rings, and a key member which includes an annular body, a first inwardly projecting part which is provided on the annular body and adapted to be inserted into the first key groove of the outer ring, and an outwardly projecting part which is provided on an outer periphery of the annular body and adapted to be inserted into the key groove of the axle box.

Claims

1. A bearing apparatus to be supported by an axle box which includes a key groove, the bearing apparatus comprising:

an outer ring which includes a first key groove extending from an inner diameter to an outer diameter of an axial end surface of the outer ring;

an inner ring;

rolling elements rollably interposed between the outer and inner rings; and

a key member which includes an annular body, a first inwardly projecting part which is provided on the annular body and adapted to be inserted into the first key groove of the outer ring, and an outwardly projecting part which is provided on an outer periphery of the annular body and adapted to be inserted into the key groove of the axle box, wherein

the annular body includes an inwardly directed flange part,

the outwardly projecting part extends from the flange part in an axial direction thereof, and

an inner diameter of the outwardly projecting part is substantially equal to an outer diameter of the outer ring.

2. The bearing apparatus according to claim 1, wherein

the outer ring includes a second key groove extending from the inner diameter to the outer diameter of the axial end surface of the outer ring,

the key member includes a second inwardly projecting part which extends inwardly from the flange part and is adapted to be inserted into the second key groove of the outer ring, and

an inner diameter of the flange part is substantially equal to the outer diameter of the outer ring.

3. The bearing apparatus according to claim 2,

wherein the first inwardly projecting part inwardly extends from the inwardly directed flange part.

4. The bearing apparatus according to claim 1, wherein the key member includes:

an annular holding member which forms the flange part and includes a groove; and

an engaging member which forms the inwardly projecting part and the outwardly projecting part and which includes an engaging part engaged with the groove of the holding member.

5. The bearing apparatus according to claim 1,

wherein the inwardly directed flange part covers the axial end surface of the outer ring, and

wherein the first inwardly projecting part extends from the inwardly directed flange part in an axial direction thereof.