Bearing unit and method for producing a raceway ring member for a bearing unit

The present relates to a bearing unit comprising a first raceway ring (2) which is mounted on a vehicle body; a second raceway ring (4) which is disposed to face the first raceway ring (2) and is mounted on a wheel; and a plurality of rolling elements (6, 8) which are disposed rollably between racew...

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Bibliographic Details
Main Authors KIYOSHI, OOTSUKA, KENICHI, NAGAI, KAZUTO, KOBAYASHI, MASATO, NAGANO, TATSUO, WAKABAYASHI, YUU, YASUDA
Format Patent
LanguageEnglish
French
German
Published 10.12.2014
Subjects
AXLES FOR WHEELS OR CASTORS
BEARINGS
BLASTING
CASTORS
ELEMENTS OR CRANKSHAFT MECHANISMS
ENGINEERING ELEMENTS AND UNITS
FLEXIBLE SHAFTS
FORGE FURNACES
FORGING
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HAMMERING
HEATING
INCREASING WHEEL ADHESION
LIGHTING
MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES,RIVETS, BOLTS OR WHEELS
MECHANICAL ENGINEERING
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PRESSING METAL
PUNCHING METAL
RIVETING
ROTARY BODIES OTHER THAN GEARING ELEMENTS
SHAFTS
THERMAL INSULATION IN GENERAL
TRANSPORTING
VEHICLE WHEELS
VEHICLES IN GENERAL
WEAPONS
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Summary:The present relates to a bearing unit comprising a first raceway ring (2) which is mounted on a vehicle body; a second raceway ring (4) which is disposed to face the first raceway ring (2) and is mounted on a wheel; and a plurality of rolling elements (6, 8) which are disposed rollably between raceway surfaces (2s, 4s) which are formed, respectively, on facing surfaces (2n, 4m) of the first and second raceway rings (2, 4), wherein the second raceway ring (4) has a raceway ring member (12) which has a radially projecting flange (12a); and an inner ring (16) which is clamped to an axial end portion (12c) of the raceway ring member (12) so as to be locked on the raceway ring member (12), the flange (12a) is formed monolithically with the raceway ring member (12) by performing a cold forging on a material (20) made of machine structural carbon steel without performing an annealing after the forging, and a hardness of a root portion of the flange (12a) is set higher than a hardness of the axial end portion (12c) of the raceway ring member (12) before clamping.
Bibliography:Application Number: EP20130000962