Bearing apparatus

• US 20090148092A1
• Filed: 12/02/2008
• Published: 06/11/2009
• 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
• Granted Patent: US 8,303,188 B2
• Time in Patent Office: Days
• US Class Current: 384/569
• 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

An outer ring is provided with a key groove radially extending from an inner diameter to an outer diameter on an end surface thereof. A key member includes an annular body, an inwardly projecting part which is provided on an inner periphery of the annular body and adapted to be inserted into the 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 a key groove of an 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 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 an inner periphery of 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.

2. The bearing apparatus according to claim 1, wherein

the annular body includes an inwardly directed flange part which covers the end surface of the outer ring,

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.

3. The bearing apparatus according to claim 2, wherein

the outer ring includes a second key groove extending from the inner diameter to the outer diameter of the 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.

4. The bearing apparatus according to claim 2, 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 includes an engaging part engaged with the groove of the holding member.

5. The bearing apparatus according to claim 1, wherein

the annular body includes a cylindrical part which covers an outer peripheral surface of the outer ring, and an inwardly directed flange part which covers the end surface of the outer ring, and

the outwardly projecting part is formed on an outer peripheral surface of the cylindrical part along an entire length of the cylindrical part in an axial direction thereof.

6. The bearing apparatus according to claim 5, wherein

the key member includes:

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

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

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

an outer ring which has an outer peripheral surface formed into an eccentric surface;

an inner ring;

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

a key member which includes an annular body having an inner peripheral surface corresponding to the eccentric surface of the outer ring and an outer peripheral surface in a cylindrical surface, 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.