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Hisashi Ohtsuki
Hisashi Ohtsuki, Shizuoka-Ken JP
| Patent application number | Description | Published |
|---|---|---|
| 20080310784 | Bearing Apparatus for a Wheel of Vehicle - A vehicle wheel bearing apparatus has an outer member ( | 12-18-2008 |
| 20090074342 | WHEEL BEARING DEVICE - A wheel bearing device includes a hub ring, a double-row bearing and a constant velocity universal joint which are unitized together. At least one of double-row inner raceways of the bearing and a wheel mounting flange are formed on a hub ring. The hub ring and a stem portion of a joint outer ring of the constant velocity universal joint are fitted through a torque transmission assembly, wherein a pilot member as a separate element having a wheel guide portion and a brake guide portion is fitted to a side-end portion of the wheel mounting flange of the hub ring, and the hub ring and the pilot member are fixed to the joint outer ring by swaging. | 03-19-2009 |
| 20110056080 | METHOD FOR MANUFACTURING A DRIVE WHEEL BEARING DEVICE - A method for manufacturing a drive wheel bearing device is provided. During the manufacturing, a swaged portion is formed in a manner as a non-hardened region, and in a manner that variations based on a reference surface in the axial direction of the flat surface are restricted within +/−0.2 mm The reference surface is provided with an end face on an outboard side of a flange for an attachment of a wheel or an end face on an inboard side of the flange for attachment to a vehicle body. Part of the swaged portion making contact with an outer joint member of to drive wheel bearing device is formed into a flat surface. Serrations and a pilot part are formed on an inner periphery of a first inner member of the drive wheel bearing device. An inner peripheral surface of the pilot part is formed as a turned surface, and the turned surface has been turned after forming the swaged portion. A serrated shaft is formed on the outer joint member for transmitting torque to and from the first inner member through the serrations and an outer periphery surface opposing to the pilot part. A surface hardened layer is formed on the outer joint member by heat treatment in a region that includes at least the serrated shaft. | 03-10-2011 |
Hisashi Ohtsuki, Shizuoka JP
| Patent application number | Description | Published |
|---|---|---|
| 20090129717 | Bearing Device for Wheel - To provide a third generation type wheel support bearing assembly in which a stress concentration in a recess in a hub axle can be reduced, and the repeated fatigue strength can be increased. A hardened layer is provided by means of a heat treatment at least in a portion from a raceway in a surface portion of a hub axle made of a carbon steel to a flange root portion. A recess as a circumferential groove is formed along a corner portion defined between a raceway in the hardened layer and a large collar with which an end face of a roller contacts. The recess is formed by means of a lathe turning work, after formation of the hardened layer and then undergoes machining or grinding within an inner surface thereof, thereby causing a compressive residue stress to the hardened layer. | 05-21-2009 |
| 20090304319 | Bearing Device for Wheel - It is an object of the present invention to allow an assembly of retainers and tapered rollers to be easily incorporated into an outer ring having a rib portion on an inner peripheral surface on an outboard side thereof, whereby helping to achieve an improvement in terms of assembly workability. Recesses ( | 12-10-2009 |
| 20100002972 | WHEEL SUPPORT BEARING ASSEMBLY AND METHOD OF MAKING THE SAME - There is provided a wheel support bearing assembly in which at least one of the outer member ( | 01-07-2010 |
Hisashi Ohtsuki, Iwata-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20080205810 | Bearing apparatus for wheel - A bearing apparatus for wheel with ensured high durability by including a part with improved fatigue strength in a non-hardened portion includes an outer member, an inner member, and a roller. The inner member includes a hub ring made of steel and having a wheel attachment flange formed. The hub ring has a hardened portion hardened to attain at least 50 HRC as a result of quench hardening and a non-hardened portion which is a portion other than the hardened portion. Compressive stress in a range from at least 50 MPa to at most 500 MPa remains in the surface of the non-hardened portion. | 08-28-2008 |
| 20090016662 | Wheel support bearing assembly and manufacturing method thereof - A wheel support bearing assembly with a hub axle ( | 01-15-2009 |
| 20090148091 | Wheel Bearing Apparatus - A vehicle wheel bearing apparatus has a double row angular ball bearing including double rows of ball groups. A pitch circle diameter of the double row ball group of the outer side is larger than a pitch circle diameter of the double row ball group of the inner side. The outer member is made of medium carbon steel including carbon of 0.40˜0.80% by weight. It is hardened by high frequency induction quenching so that each of the outer raceway surfaces is formed with a hardened layer having a surface hardness of 58˜64 HRC. The effective depth of hardened layer is set at at least 2 mm. The minimum wall thickness of the outer member at these outer raceway surfaces is set at at least 4 mm. | 06-11-2009 |
| 20090220180 | Wheel Bearing Apparatus For A Vehicle - A vehicle wheel bearing apparatus has an outer member formed, on its inner circumference, with double row outer raceway surfaces. An inner member includes a wheel hub integrally formed with a wheel mounting flange at its one end. The wheel hub outer circumference surface has double row inner raceway surfaces arranged opposite to the double row outer raceway surfaces. Double row balls are freely rollably contained between the outer raceway surfaces and inner raceway surfaces, respectively, of the outer member and the inner member. A pitch circle diameter of the double row ball group of the outer-side is larger than a pitch circle diameter of the double row ball group of the inner-side. At least the outer member and the wheel hub are formed of medium/high carbon steel including carbon of 0.40˜0.80% by weight. The inner and outer raceway surfaces are formed, respectively, with predetermined hardened layers with a surface hardness of 58˜64 HRC. The grain size number of austenite crystal grains of the metallographic structure in the hardened layers is selected larger than #7. | 09-03-2009 |
| 20090232435 | Wheel Bearing Apparatus For A Vehicle - A vehicle wheel bearing apparatus has an outer member formed, on its inner circumference, with double row outer raceway surfaces. An inner member is formed on its outer circumference surface, with double row inner raceway surfaces arranged opposite to the double row outer raceway surfaces. Double ball groups are freely rollably contained between the outer raceway surfaces and inner raceway surfaces, respectively, of the outer member and the inner member. It is formed as a double row angular contact ball bearing of back-to-back duplex type where a predetermined contacting angle is applied to each ball. A pitch circle diameter of the outer-side ball group is larger than a pitch circle diameter of the inner-side ball group. The outer-side groove diameter of curvature ratios are smaller than inner-side groove diameter of curvature ratios. | 09-17-2009 |