WO2003074891A1 - Bearing device and method of manufacturing the bearing device - Google Patents
Bearing device and method of manufacturing the bearing device Download PDFInfo
- Publication number
- WO2003074891A1 WO2003074891A1 PCT/JP2003/002625 JP0302625W WO03074891A1 WO 2003074891 A1 WO2003074891 A1 WO 2003074891A1 JP 0302625 W JP0302625 W JP 0302625W WO 03074891 A1 WO03074891 A1 WO 03074891A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shaft
- bearing device
- cementite
- cooling
- pearlite
- Prior art date
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0078—Hubs characterised by the fixation of bearings
- B60B27/0084—Hubs characterised by the fixation of bearings caulking to fix inner race
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0005—Hubs with ball bearings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/001—Hubs with roller-bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0094—Hubs one or more of the bearing races are formed by the hub
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
- F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
- F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
- F16C35/063—Fixing them on the shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C43/00—Assembling bearings
- F16C43/04—Assembling rolling-contact bearings
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/003—Cementite
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
- F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
- F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
- F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
- F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
- F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
- F16C19/187—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with all four raceways integrated on parts other than race rings, e.g. fourth generation hubs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
- F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
- F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
- F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2326/00—Articles relating to transporting
- F16C2326/01—Parts of vehicles in general
- F16C2326/02—Wheel hubs or castors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49636—Process for making bearing or component thereof
Definitions
- the present invention relates to a rolling bearing device suitably used for, for example, an axle of a vehicle, and a method of manufacturing the same.
- a rolling bearing device for an axle generally has an outer ring member mounted on the vehicle body side, and an inner ring member rotatably supported on the outer ring member around an axis via double-row rolling elements.
- the inner ring member includes a hap shaft to which wheels are attached, and an annular inner raceway member fitted to an end of the hap shaft.
- the hub axle is enlarged in diameter in the radially outward direction and is caulked to the end face of the inner raceway body, whereby the hub shaft is integrally rotatably attached to the inner raceway body.
- Such a hap shaft is generally made of a steel material such as carbon steel. Such a steel material has a mixed structure of perlite and proeutectoid ferrite.
- An object of the present invention is to provide a bearing device using a steel material having the above-described mixed structure, in which a microcrack does not occur during the caulking, and a method for manufacturing the same. Disclosure of the invention
- a bearing device of the present invention includes: a bearing ring; and a shaft body made of carbon steel having a pearlite having a layered structure of cementite and having an end portion caulked to the bearing ring.
- a bearing ring made of carbon steel having a pearlite having a layered structure of cementite and having an end portion caulked to the bearing ring.
- Edition in the perlite at the end This is a device with a large space between tiles.
- At least the end of the shaft has an average force of the cementite layer interval of 0.15 ⁇ or more and 0.4 ⁇ m or less.
- the present inventors have found that the cause of the generation of the minute cracks is affected by the presence of cementite in the pearlite, and based on this, set the average value of the cementite layer spacing as described above. did. According to such a configuration, when the end of the shaft body is swaged with respect to the race, the rate of occurrence of microcracks at the end can be reduced to zero. As a result, the supply of the bearing device as a product can be improved.
- the average value of the cementite layer interval is in the range of 0.15 to 0.35 im and the end of the shaft has a hardness of 15 HRC or more. Good.
- the shaft body is preferable because it has sufficient hardness as a bearing device.
- the bearing device of the present invention can be applied to various vehicles, for example, axles of automobiles, railway vehicles, aircrafts, and the like.
- the bearing ring includes not only the inner ring or the outer ring of the bearing device but also a hap wheel in a case where the outer ring end of the constant velocity joint is swaged against the end surface of the hap wheel in a bearing device having a constant velocity joint.
- the shaft body also includes a hub shaft of a rolling bearing for an axle, or a shaft formed on an outer ring of a constant velocity joint rotatably integrated with a hub wheel.
- the steel material used for the shaft body is a carbon steel having a carbon content of 0.37% to 0.65%.
- FIG. 1 is a cross-sectional view showing a schematic configuration of a rolling bearing device according to a preferred embodiment of the present invention.
- FIG. 2 is an enlarged cross-sectional view of the main part.
- FIG. 3 is a sectional view of a hub shaft for each lot.
- FIG. 4 is an enlarged sectional view of the same pearlite.
- FIG. 5 is a diagram showing cooling characteristics in hot forging of a hub axle.
- FIG. 6 is a sectional view showing a schematic configuration of a rolling bearing device according to another embodiment of the present invention.
- FIG. 7 is a cross-sectional view showing a schematic configuration of a rolling bearing device according to still another embodiment of the present invention.
- FIG. 1 is a cross-sectional view showing the overall configuration of the rolling bearing device
- FIG. 2 is an enlarged cross-sectional view of a caulked portion
- FIGS. 3 (a) to (f) are schematic cross-sectional views showing the composition of the caulked portion
- FIG. FIG. 1 the right side in the axial direction shows the vehicle inner side, and the left side in the axial direction shows the vehicle outer side.
- the rolling bearing device 1 shown in the figure includes two inner ring members 2 and 3 each having one row of inner ring raceways as race rings arranged radially in and out of a double-row outward-facing anguilla ball bearing. And one outer ring member 4 having two rows of outer ring raceways.
- the rolling bearing device 1 also holds ball groups 5 and 6 interposed in two rows in the axial direction between the raceways of the inner ring members 2 and 3 and the outer ring member 4 and the ball groups 5 and 6 in each row. Crown retainers 7, 8 and a seal member 9 at an axial end.
- the inner ring member 2 is composed of a hub axle that functions as a shaft to which a brake disk, wheels, and the like are attached.
- the other inner ring member 3 is constituted by the inner ring itself fitted on the outer periphery of the hub shaft 2.
- One inner ring member 2 is referred to as a hap shaft 2
- the other inner ring member 3 is referred to as an inner ring 3.
- the hap shaft 2 and the inner ring 3 constitute a raceway arranged radially inward in a double-row outward-facing angular bearing.
- Outer ring member 4 is used for double row outward angular bearings.
- Orbital transfer arranged radially outside the vehicle.
- the hap shaft 2 when the end of the hap shaft 2 is swaged to the end face of the inner ring 3, the hap shaft 2 can be called a shaft body, and the inner ring 3 can be called a raceway ring.
- the hub shaft 2 has a radially outward hap flange 11.
- a brake disc (not shown) is attached to the hub flange 11 by a hub port 12.
- the outer ring member 4 has a radially outward mounting flange 13 and is non-rotatably supported by the vehicle body (not shown) via the mounting flange 13.
- a caulking recess 14 is formed at the inner end of the hub axle 2 on the vehicle inner side, and is formed in a cylindrical shape.
- the cylindrical portion at the vehicle inner side end is expanded radially outward and caulked against the outer end surface of the inner race 3.
- the end of the hap shaft 2 caulked in this manner is called a caulked portion 15.
- the rolling bearing device 1 constitutes a bearing device in which the hub shaft 2 and this bearing are integrated. I do.
- Hub shaft 2 is formed of carbon steel.
- the carbon steel a carbon steel material for a mechanical structure having a carbon content of 0.37% to 0.65% is selected, and among them, S55C in the JIS standard is selected. This S55C has a carbon content of 0.52 to 0.58%.
- the metallographic structure is composed of a mixed structure of perlite 16 and proeutectoid ferrite.
- the perlite 16 has a cementite 18 in a layered form.
- the average value of the layer spacing that is, the lamella spacing of the cementite 18 is set to be 0.15 or more and 0.35 / m or less. The reason why the average value of the layer spacing of the cementite 18 is specified in the above range will be described below.
- FIGS. 3 (a) to 3 (f) each schematically show a state of a cross section corresponding to the vehicle inner side of the hap shaft 2.
- These hap axes 2 have different types of conditions Below, it is manufactured by multiple lot production.
- Figs. 3 (a) to 3 (f) show a state in which the hub shaft 2 cut in the radial direction is etched by boiling it with an alkaline solution of sodium picrate to enable observation of the metal structure. You.
- a portion A cross-hatched portion in FIG. 3 that is black-etched
- a portion B white hatched portion in FIG. 3 that is etched white The part without cross hatching
- the plurality of different conditions refer to differences in the length of time required for cooling the hap shaft 2 to a predetermined temperature (for example, room temperature) after forging. That is, assuming that the slow cooling time of the hap shaft 2 shown in FIG. 3 (a) is 1, the slow cooling time of FIG. 3 (b) is 1.2, the slow cooling time of FIG. 3 (c) is 1.3, The slow cooling time in Fig. 3 (d) is 1.5. The slow cooling time in FIGS. 3 (e) and 3 (f) is 0.5 for each.
- portion A to be etched black under a microscope Observation of the portion A to be etched black under a microscope reveals that many pearlites 16 having cementites 18 having an average lamella spacing of less than 0.15 ⁇ m are present. Further, when the portion B to be etched white is observed with a microscope, many pearlites 16 having an average lamella spacing force of 0.15 Mm to 0.4 / m are present.
- Such a difference is necessary for cooling the hub axle 2 to a predetermined temperature after forging. This is probably due to the difference in the length of time spent. That is, if the time for cooling the forged hap shaft 2 to a predetermined temperature (for example, room temperature) is short, the pearlite 16 having a narrow lamella interval, that is, the portion A that is black-etched, is likely to be generated, and the length after forging is longer. When cooled to a predetermined temperature over a long period of time, many pearlites 16 having a wide lamella spacing, that is, a large portion B to be etched white are generated. In addition, since the portion corresponding to the caulked portion 15 is located at the tip, it is easy to be cooled even in a short time, so that the portion A that is black-etched easily occurs.
- a predetermined temperature for example, room temperature
- FIG. 4 is a schematic diagram when perlite 16 is observed at a high magnification using a microscope. In this figure, it can be seen that perlite 16 has a lamellar structure in which ferrite 19 and cementite 18 are alternately present in layers.
- the intervals a1, a2, a3, 10 When the average value (al + a2 + a3 + ... ten al0) / 10 is smaller than 0.15 zm, it is found that a crack is generated in the caulked portion 15 did.
- This average value is the average value of the 10 layer intervals al, a2, a3, ..., a10 on one straight line crossing the 11 cementitious 18 layers. .
- the lower limit of the average layer spacing of cementite 18 was set to 0.15 ⁇ m in order to prevent the occurrence of cracks in caulked portion 15.
- the layer spacing is the substantial layer spacing of the cementite 18 layers
- the cracking rate is the cracking rate when the end of the hub axle 2 is caulked
- the hardness is the hap axis.
- the Rockwell C hardness (HR C) at the end of No. 2 is shown.
- Layer spacing (; zm) 0.1 0. 1 5 0. 2 0. 3 5 0. 4 Crack generation rate (%) 0.5 0 0 0 0 0 Hardness (HRC) 28 25 20 1 5 1 2
- HRC Hardness
- Table 1 shows that the hardness of the hap axis 2 is 12 HRC when the layer spacing (lamella spacing) of cementite 18 in perlite 16 is 0.4 / zm.
- the hardness required for the hub shaft 2 of this type of rolling bearing device 1 is preferably 15 HRC or more.
- the upper limit of the average of the gap between cementite 18 layers must be 0.35 m.
- the average value of the layer spacing of cementite 18 was set in the range of 0.15 m or more and 0.35 / m or less.
- the hub axle 2 is formed from a base material by hot forging into a shape substantially similar to the final shape, and is turned into a final shape by turning a necessary portion such as a raceway surface.
- the hap shaft 2 is heated to about 1,200 at the time of hot forging, and cooled after completion of forging. See cooling curve b in Figure 5. During this cooling, only the shaft end of the hub axle 2 is cooled more slowly than the other portions of the hub axle 2, so that the lamella spacing of the pearlite at the end of the hap axle 2 is reduced by the other Can be larger than the part.
- hap shaft 2 A method for reducing the cooling rate of the shaft end by heating only the shaft end at a high frequency will be described. As shown in Fig.
- the lamella spacing of the pearlite can be greater than the other parts of the hap axis 2.
- the temperature at which the shaft end is heated is adjusted within a range of about 750 ° C or about 800 ° C depending on the material of the hub shaft 2.
- the method of reducing the cooling speed of the shaft end in the present invention is not limited to the above-described high-frequency heating and heat insulating material, but may be another method.
- the lamella spacing between the pearlites is increased by slowing down the cooling speed of only the shaft end of the hub shaft 2.
- the present invention is not limited to this, and the cooling speed of the entire hap shaft 2 May be adjusted to increase the lamella spacing of the perlite on the entire hap axis 2.
- the following method can be considered.
- the entire hap shaft 2 is temporarily heated at a high frequency or the like.
- a cooling furnace where the cooling rate can be adjusted in the cooling process, cool gradually. Cover the entire hub axle 2 with a heat insulating material and gradually cool it.
- both inner ring members of the rolling bearing device 1 may be constituted by the inner rings 3 and 3a themselves as shown in FIG.
- the shaft body is constituted by the hub axle 2 and the race is constituted by the inner ring 3.
- portions corresponding to FIG. 1 are denoted by the same reference numerals.
- a part of the roller bearing is also used as the hub shaft 2 so that the hap shaft and the roller bearing are integrated.
- the average value of layer spacing of Sementai sheet 1 8 constituting the pearlite 1 6 of the caulking portion 1 5 becomes zero. 1 5 ⁇ or 0. 3 5 m below It is set as follows. Thereby, when the end of the hub axle 2 is swaged with respect to the inner ring 3, it is possible to prevent the occurrence of cracks in the swaged portion 15. Further, the hap shaft 2 of the rolling bearing device 1 has sufficient hardness. Therefore, destroy the product. Waste can be eliminated, and product supply can be improved.
- the present invention is also applicable to the rolling bearing device 1 on the driving wheel side.
- an inner ring member is rotatably supported via balls 5 and 6 on an outer ring member 4 supported non-rotatably on the vehicle body side.
- One inner ring member is a bowl-shaped outer ring member 20 of a constant velocity joint
- the other inner ring member is a hap shaft (in this case, a hub wheel) 2.
- the end of the shaft 21 integral with the bowl-shaped outer ring member 20 of the constant velocity joint is caulked to the end face of the hap shaft 2.
- FIG. 7 other parts corresponding to FIG. 1 are denoted by the same reference numerals.
- the average value of the layer spacing of the cementite 18 forming the pearlite 16 of the caulked portion 15 is 0.15 or more and 0.35 ⁇ or less. It is set as follows. Thereby, when the end of the hap shaft 2 is swaged with respect to the inner ring 3, the occurrence of cracks in the swaged portion 15 can be prevented. Further, the hap shaft 2 of the rolling bearing device 1 has sufficient hardness. Therefore, waste such as discarding the product is eliminated, and the supply of the product can be improved.
- the present invention can be similarly applied to rolling bearings other than the double-row outward-facing angular bearing.
- the rolling bearing may be a single-row rolling bearing other than a double-row, for example.
- the present invention relates to a case where the shaft of the rolling bearing device is a cylindrical body disposed radially outside the outer ring member, and the end of the cylindrical body is swaged to the end of the outer ring member which is a raceway ring.
- the cylindrical body may be, for example, a housing or the like.
- the average value of the 10 intervals in the cementite 18 layers is calculated, and the average value (a 1 + a 2 + a 3 + + al 0) 10 was set to be 0.35 ⁇ m or less when it was 0.15 m or more.
- the present invention is not limited to this.
- the average value of the II intervals in the cementite 18 layer is defined as the value of (al + a2 + a3 +-+ an-1 + an) Zn is 0.4 when the value of Zn is 0.15 / zm or more. It may be less than / zm, or more than 0 and less than 0.35 ⁇ m.
- hap axis 2 It is possible to prevent the occurrence of cracks in the swaged portion 15 when the end of the inner ring 3 is swaged against the inner ring 3. Further, the hub bearing 2 of the rolling bearing device 1 has sufficient hardness. Alternatively, discarding the product eliminates waste and can improve product supply.
- ADVANTAGE OF THE INVENTION According to this invention, it can be applied as a bearing device for axles of various vehicles such as automobiles, railway vehicles, and aircraft.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rolling Contact Bearings (AREA)
- Sliding-Contact Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/497,041 US7690846B2 (en) | 2002-03-06 | 2003-03-06 | Bearing device and method of manufacturing the bearing device |
EP03710256A EP1482193B1 (en) | 2002-03-06 | 2003-03-06 | Bearing device and method of manufacturing the bearing device |
JP2003573308A JP4314997B2 (ja) | 2002-03-06 | 2003-03-06 | 軸受装置およびその製造方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002060263 | 2002-03-06 | ||
JP2002-60263 | 2002-03-06 |
Publications (1)
Publication Number | Publication Date |
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WO2003074891A1 true WO2003074891A1 (en) | 2003-09-12 |
Family
ID=27784787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/002625 WO2003074891A1 (en) | 2002-03-06 | 2003-03-06 | Bearing device and method of manufacturing the bearing device |
Country Status (4)
Country | Link |
---|---|
US (1) | US7690846B2 (ja) |
EP (1) | EP1482193B1 (ja) |
JP (1) | JP4314997B2 (ja) |
WO (1) | WO2003074891A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008307563A (ja) * | 2007-06-13 | 2008-12-25 | Ntn Corp | フランジ構造体の製造方法 |
JP2013164160A (ja) * | 2013-03-05 | 2013-08-22 | Nsk Ltd | 車輪支持用転がり軸受装置の製造方法 |
Families Citing this family (4)
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EP1908852B1 (en) * | 2005-07-20 | 2013-08-21 | NTN Corporation | Bearing device for wheel |
EP2105322B1 (en) * | 2008-03-28 | 2012-01-18 | JTEKT Corporation | Wheel bearing assembly, manufacturing method therefor, and calk jig |
CN101804771B (zh) * | 2009-02-17 | 2014-03-12 | 株式会社捷太格特 | 车轮用轴承装置及其制造方法 |
DE102013001117B4 (de) | 2013-01-23 | 2015-09-03 | Audi Ag | Radlager für die rotatorische Lagerung einer Radnabe eines Fahrzeugs |
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JP2002021858A (ja) * | 2000-07-06 | 2002-01-23 | Ntn Corp | 車輪軸受装置 |
US20020012486A1 (en) | 1999-12-16 | 2002-01-31 | Hirohide Ishida | Wheel-support rolling bearing unit and a method manufacturing the same |
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US3846183A (en) * | 1973-05-02 | 1974-11-05 | Bethlehem Steel Corp | Method of treating steel rail |
JPS62199718A (ja) * | 1986-02-25 | 1987-09-03 | Nippon Steel Corp | 機械構造用鋼の圧延材直接軟質化法 |
JP2001171308A (ja) * | 1999-12-15 | 2001-06-26 | Ntn Corp | 駆動車輪用軸受装置 |
-
2003
- 2003-03-06 US US10/497,041 patent/US7690846B2/en not_active Expired - Lifetime
- 2003-03-06 EP EP03710256A patent/EP1482193B1/en not_active Expired - Lifetime
- 2003-03-06 JP JP2003573308A patent/JP4314997B2/ja not_active Expired - Fee Related
- 2003-03-06 WO PCT/JP2003/002625 patent/WO2003074891A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US20020012486A1 (en) | 1999-12-16 | 2002-01-31 | Hirohide Ishida | Wheel-support rolling bearing unit and a method manufacturing the same |
JP2002021858A (ja) * | 2000-07-06 | 2002-01-23 | Ntn Corp | 車輪軸受装置 |
Non-Patent Citations (1)
Title |
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See also references of EP1482193A4 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008307563A (ja) * | 2007-06-13 | 2008-12-25 | Ntn Corp | フランジ構造体の製造方法 |
JP2013164160A (ja) * | 2013-03-05 | 2013-08-22 | Nsk Ltd | 車輪支持用転がり軸受装置の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1482193A1 (en) | 2004-12-01 |
JP4314997B2 (ja) | 2009-08-19 |
EP1482193A4 (en) | 2008-07-02 |
JPWO2003074891A1 (ja) | 2005-06-30 |
EP1482193B1 (en) | 2011-06-22 |
US20050078901A1 (en) | 2005-04-14 |
US7690846B2 (en) | 2010-04-06 |
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