WO2015041355A1 - Dispositif de palier de roue de véhicule et corps intermédiaire, et procédé pour leur production - Google Patents

Dispositif de palier de roue de véhicule et corps intermédiaire, et procédé pour leur production Download PDF

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Publication number
WO2015041355A1
WO2015041355A1 PCT/JP2014/074968 JP2014074968W WO2015041355A1 WO 2015041355 A1 WO2015041355 A1 WO 2015041355A1 JP 2014074968 W JP2014074968 W JP 2014074968W WO 2015041355 A1 WO2015041355 A1 WO 2015041355A1
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WO
WIPO (PCT)
Prior art keywords
wheel
mounting flange
hub
bearing device
insertion hole
Prior art date
Application number
PCT/JP2014/074968
Other languages
English (en)
Japanese (ja)
Inventor
理 満石
Original Assignee
Ntn株式会社
理 満石
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Filing date
Publication date
Application filed by Ntn株式会社, 理 満石 filed Critical Ntn株式会社
Publication of WO2015041355A1 publication Critical patent/WO2015041355A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/28—Making machine elements wheels; discs
    • B21K1/40—Making machine elements wheels; discs hubs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2310/00—Manufacturing methods
    • B60B2310/20—Shaping
    • B60B2310/208—Shaping by forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/10—Reduction of
    • B60B2900/111—Weight
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B2900/00—Purpose of invention
    • B60B2900/10—Reduction of
    • B60B2900/113—Production or maintenance time
    • 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
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
    • 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
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

Definitions

  • the present invention relates to a wheel bearing device for supporting a wheel of an automobile or the like, and more particularly, to a wheel bearing device, an intermediate body, and a method for manufacturing the same, which achieve cost reduction by reducing forging input weight and turning amount.
  • the wheel bearing device shown in FIG. 8 is a typical one.
  • This wheel bearing device is a wheel bearing device that rotatably supports a driven wheel, and is an inner member 51, an outer member 52, and a double row accommodated so as to roll between both members 51, 52.
  • the inner member 51 refers to a hub ring 54 and an inner ring 55 press-fitted into the hub ring 54.
  • the hub wheel 54 extends radially outward at one end portion, and integrally has a wheel mounting flange 56 for mounting a wheel (not shown).
  • Bolt insertion holes are provided at circumferentially equidistant positions of the wheel mounting flange 56. 56b is bored, and a hub bolt 56a for fastening the wheel is implanted in the bolt insertion hole 56b.
  • through-holes 56c for making a knuckle bolt (not shown) easy to tighten with a tool are drilled while being reduced in weight.
  • one inner rolling surface 54a and a small-diameter step portion 54b extending in the axial direction from the inner rolling surface 54a are formed, and the inner ring 55 is press-fitted into the small-diameter step portion 54b.
  • the inner ring 55 is fixed to the hub ring 54 in the axial direction by a caulking portion 54c formed by plastically deforming the end of the small-diameter stepped portion 54b radially outward.
  • the other inner rolling surface 55 a is formed on the outer periphery of the inner ring 55.
  • the outer member 52 integrally has a vehicle body mounting flange 52b to be attached to a knuckle (not shown) constituting a suspension device on the outer periphery, and double row outer rolling surfaces 52a, 52a are provided on the inner periphery.
  • the inner rolling surfaces 54a, 55a of the inner member 51 that are integrally formed and face the outer rolling surfaces 52a, 52a
  • one inner rolling surface 54a is formed on the hub wheel 54 and the other inner rolling surface 54a.
  • 55a is formed in the outer periphery of the inner ring
  • Double-row balls 53 and 53 are accommodated between these rolling surfaces 52a and 54a and 52a and 55a, and are held by rollers 57 and 57 so as to be freely rollable.
  • a seal 58 and a pulsar ring 59 are attached to the opening portion of the annular space formed between the inner member 51 and the outer member 52, and leakage of the lubricating grease sealed inside the bearing to the outside, rainwater and Dust and the like are prevented from entering the bearing.
  • a cylindrical wheel pilot portion 60 is formed at the base of the wheel mounting flange 56 of the hub wheel 54.
  • the wheel pilot section 60 guides an inner diameter surface of a wheel (not shown) that is mounted on a brake rotor (not shown).
  • a concave portion 60a is formed by forging so as to leave the forged surface.
  • a convex portion 60b having a substantially uniform cylindrical processing surface is formed by turning in a portion other than the concave portion 60a of the wheel pilot portion 60.
  • the concave portions 60 a and the convex portions 60 b are alternately arranged at five locations on the outer periphery of the wheel pilot portion 60. Thereby, weight reduction can be achieved without reducing the rigidity of the hub wheel 54.
  • the recessed part 60a and the convex part 60b of the wheel pilot part 60 are formed in the equidistant position between the adjacent wheel mounting flanges 56.
  • the annular base portion of the wheel mounting flange 56 has a relatively uniform thickness in the circumferential direction, and the forging process of the hub wheel 54 facilitates plastic flow of the forging material and improves forging processability. To do.
  • forging accuracy is improved, productivity is increased, and cost reduction can be achieved (for example, see Patent Document 1).
  • the concave and convex portions 60a and 60b are formed on the outer peripheral surface of the wheel pilot portion 60 of the hub wheel 54 by forging, thereby reducing the weight and cost while maintaining the strength and durability.
  • the hub wheel 54 is ground, there is a problem in that the processing accuracy of the inner rolling surface 54a and the like decreases due to a decrease in the contact area with the backing plate.
  • the hub wheel 54 is provided with a through hole 56c and a bolt insertion hole 56b for weight reduction. Since the through hole 56c is relatively large, such as ⁇ 20 to 30 mm, it is formed by forging.
  • the bolt insertion hole 56b has a small diameter of about ⁇ 10 to 14 mm, the burden on the mold increases, so that the side surface of the wheel mounting flange 56 is flat as shown in FIG. Forged, as shown in (b), drilling or chamfering is performed by turning. This increased the amount of turning and forging input during processing, and there was still room for improvement in cost reduction.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a wheel bearing device, an intermediate body, and a method for manufacturing the same, which are reduced in cost by reducing forging input weight and turning amount. .
  • the invention according to claim 1 of the present invention includes an outer member in which a double row outer rolling surface is integrally formed on the inner periphery, and a wheel attachment for attaching a wheel to one end.
  • an outer member in which a double row outer rolling surface is integrally formed on the inner periphery, and a wheel attachment for attaching a wheel to one end.
  • a hub ring integrally having a flange and having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring fitted to the small-diameter step portion of the hub ring or an outer joint member of a constant velocity universal joint
  • An inner member in which a double row inner rolling surface facing the outer row rolling surface of the double row is formed on the outer periphery, and a double row accommodated in a freely rollable manner between the inner member and the outer member
  • a concave portion that becomes a chamfered portion is formed by a forged skin at a site where
  • the recess that becomes the chamfered portion is formed by the forging skin at the portion where the through hole is drilled, thereby reducing the turning allowance. Therefore, it is possible to provide a wheel bearing device that achieves cost reduction.
  • the through hole is a bolt insertion hole for press-fitting a hub bolt, and a recess is formed in advance at a site where the bolt insertion hole is drilled, and the bottom of the recess If the bolt insertion hole is formed by cutting, the forged charging weight of the hub wheel can be reduced, and the cutting range of the side surface of the wheel mounting flange can be reduced to reduce the cutting amount.
  • the said recessed part is formed in the both sides
  • chamfered portions are formed at both side openings of the bolt insertion hole, and at least one of the chamfered portions is an inclined surface of the concave portion formed by forging. If it is comprised by, the process of the chamfering part of a bolt penetration hole becomes unnecessary, a process and a cutting amount can be reduced, and cost reduction can be achieved.
  • the invention according to claim 5 of the present invention has an outer member in which a double row outer rolling surface is integrally formed on the inner periphery, and a wheel mounting flange for mounting the wheel at one end. And a hub ring having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring fitted to the small-diameter step portion of the hub ring or an outer joint member of a constant velocity universal joint.
  • An inner member in which a double-row inner rolling surface facing the double-row outer rolling surface is formed, and a double-row rolling element that is slidably accommodated between the inner member and the outer member.
  • a recess that becomes a chamfered portion is formed by forging at a portion where the through hole of the wheel mounting flange is drilled.
  • the concave portion that becomes the chamfered portion is formed by forging at the portion where the through hole of the wheel mounting flange is drilled.
  • the chamfered portion can be easily formed by forging, not only for large-diameter through-holes that can be drilled by forging, but also for small-diameter bolt insertion holes into which hub bolts are press-fitted. It is possible to reduce not only the forging input weight but also the turning allowance for the next process.
  • an outer member in which a double row outer rolling surface is integrally formed on the inner periphery and a wheel mounting flange for mounting a wheel on one end are integrated.
  • a hub ring having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring fitted to the small-diameter step portion of the hub ring or an outer joint member of a constant velocity universal joint.
  • the bolt insertion hole of the wheel mounting flange is drilled in the forging process of the hub wheel. Since a mortar-shaped recess having a flat bottom portion is formed from the side surface of the wheel mounting flange via an inclined surface, and then a bolt insertion hole is formed in the bottom portion by cutting, forging the hub wheel It is possible to reduce the weight and reduce the cutting range of the side surface of the wheel mounting flange to reduce the cutting amount, thereby providing a wheel bearing device that achieves cost reduction.
  • the inclined surface of the concave portion is constituted by a plurality of arc surfaces having a radius of curvature of R1 to R3 and smoothly connected to the bottom portion, the corner portion of the mold It is possible to suppress the occurrence of a large stress in the mold and to extend the mold life.
  • the center hole of the bolt insertion hole is integrally formed by forging at the center of the bottom of the recess, the center of the bolt insertion hole is formed when the bolt insertion hole is formed.
  • the hole serves as a guide for drilling, and the machining is facilitated, and the displacement of the bolt insertion hole is reduced and the accuracy is improved.
  • the wheel bearing device integrally has an outer member integrally formed with a double row outer rolling surface on the inner periphery, and a wheel mounting flange for mounting the wheel on one end, and on the outer periphery.
  • a hub ring formed with a small-diameter step portion extending in the axial direction, and an outer joint member of at least one inner ring or a constant velocity universal joint fitted to the small-diameter step portion of the hub ring, the outer periphery of the double row on the outer periphery
  • the hole has a small diameter, such as a bolt insertion hole, Take part can be left as a forged skin, it is possible to reduce the reduction and forged-on weight of the turning allowance, it is possible to provide a wheel bearing apparatus which attained cost.
  • the intermediate body of the wheel bearing device has an outer member in which a double row outer rolling surface is integrally formed on the inner periphery and a wheel mounting flange for mounting a wheel on one end.
  • a hub ring having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring fitted to the small-diameter step portion of the hub ring or an outer joint member of a constant velocity universal joint.
  • An inner member formed with a double-row inner rolling surface facing the double-row outer rolling surface, and a double-row rolling element housed movably between the inner member and the outer member;
  • a recess that becomes a chamfered portion is formed by forging at a portion where the through hole of the wheel mounting flange is drilled.
  • the chamfered portion can be easily formed by forging, not only reducing the forging input weight, It is possible to reduce the machining allowance for the next process.
  • the wheel bearing device manufacturing method includes an outer member in which a double row outer rolling surface is integrally formed on an inner periphery, and a wheel mounting flange for mounting a wheel on one end.
  • a hub ring having a small-diameter step portion extending in the axial direction on the outer periphery, and at least one inner ring fitted to the small-diameter step portion of the hub ring or an outer joint member of a constant velocity universal joint.
  • An inner member formed with a double-row inner rolling surface facing the double-row outer rolling surface, and a double-row rolling element housed movably between the inner member and the outer member;
  • FIG. 1 It is a longitudinal section showing a 1st embodiment of a bearing device for wheels concerning the present invention.
  • A is a front view showing the forged hub wheel of FIG. 1 after forging
  • (b) is a longitudinal sectional view
  • (c) is an enlarged view of the main part of the wheel mounting flange of (b), (d).
  • These are the principal part enlarged views which show the turning process of (c).
  • (A) is a principal part enlarged view which shows the modification of FIG.2 (c)
  • (b) is a principal part enlarged view which shows the modification of FIG.2 (d).
  • A) is a principal part enlarged view which shows the modification of Fig.3 (a)
  • (b) is a principal part enlarged view which shows the modification of FIG.3 (b).
  • (A) is a principal part enlarged view which shows the modification of Fig.4 (a)
  • (b) is a principal part enlarged view which shows the modification of FIG.4 (b).
  • (A) is a principal part enlarged view which shows the forging process of the wheel attachment flange of FIG. 7,
  • (b) is a principal part enlarged view which shows the turning process of (a).
  • An outer member integrally having a vehicle body mounting flange to be attached to the vehicle body on the outer periphery, a double row outer rolling surface formed integrally on the inner periphery, and a wheel mounting flange for mounting a wheel on one end
  • a hub wheel integrally formed and having an inner rolling surface facing one of the outer rolling surfaces of the double row on the outer periphery, and a small-diameter step portion extending in the axial direction from the inner rolling surface, and the hub wheel
  • An inner member comprising an inner ring press-fitted into a small diameter step portion and having an inner rolling surface facing the other of the outer rolling surfaces of the double row on the outer periphery, and a rolling member between the inner member and the outer member.
  • the wheel mounting frame A concave portion is formed in advance by a forging process at a site where the bolt insertion hole of the flange is drilled, and the concave portion is formed in a mortar shape having a flat bottom portion from the side surface of the wheel mounting flange via an inclined surface, A chamfered portion is formed by cutting in the bottom portion of the bolt insertion hole and opening portions on both sides thereof, and at least one of the chamfered portions is constituted by an inclined surface of the concave portion formed by forging.
  • FIG. 1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention
  • FIG. 2 (a) is a front view showing the hub wheel of FIG. 1 after forging
  • FIG. FIG. 3C is a longitudinal sectional view
  • FIG. 3C is an enlarged view of the main part of the wheel mounting flange of FIG. 2B
  • FIG. 3D is an enlarged view of the main part showing the turning process of FIG.
  • (b) is a principal part enlarged view which shows the modification of FIG.2 (d)
  • FIG.4 (a) shows the modification of FIG.3 (a).
  • FIG. 1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention
  • FIG. 2 (a) is a front view showing the hub wheel of FIG. 1 after forging
  • FIG. 3C is a longitudinal sectional view
  • FIG. 3C is an enlarged view of the main part of the wheel
  • FIG. 5B is an enlarged view of a main part showing a modification of FIG. 3B
  • FIG. 5A is an enlarged view of a main part showing a modification of FIG. 4A
  • FIG. These are the principal part enlarged views which show the modification of FIG.4 (b)
  • FIG. 6 is the principal part enlarged view which shows the other modification of FIG.2 (c).
  • the side closer to the outer side of the vehicle when assembled to the vehicle is referred to as the outer side (left side in FIG. 1), and the side closer to the center is referred to as the inner side (right side in FIG. 1).
  • the wheel bearing device shown in FIG. 1 is for a driven wheel referred to as a third generation, and includes an inner member 1, an outer member 2, and double-row rolling elements (balls) 3, 3.
  • the inner member 1 includes a hub ring 4 and a separate inner ring 5 fixed to the hub ring 4.
  • the hub wheel 4 integrally has a wheel mounting flange 6 for mounting a wheel (not shown) at an end portion on the outer side, and has one (outer side) inner rolling surface 4a on the outer periphery and the inner rolling surface. A small diameter step 4b extending in the axial direction from the surface 4a is formed. Hub bolts 6 a for fixing the wheels are planted at the circumferentially equidistant positions of the wheel mounting flanges 6.
  • the inner ring 5 is formed with the other (inner side) inner raceway surface 5a on the outer periphery and is press-fitted into the small-diameter stepped portion 4b of the hub wheel 4 to form a back-to-back type double row angular contact ball bearing. It is fixed to the hub wheel 4 in the axial direction in a state where a predetermined bearing preload is applied by a caulking portion 4c formed by plastically deforming the end portion of 4b radially outward.
  • the inner ring 5 is made of high carbon chrome steel such as SUJ2, and is hardened in the range of 58 to 64 HRC up to the core part by quenching.
  • the rolling element 3 is made of high carbon chrome steel such as SUJ2, and is hardened in the range of 62 to 67 HRC up to the core part by quenching.
  • the hub wheel 4 is made of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and the inner raceway surface 4a and the inner side base portion 6b of the wheel mounting flange 6 to the small diameter step portion 4b.
  • the surface hardness is set in the range of 58 to 64 HRC by induction hardening.
  • the caulking portion 4c is an unquenched portion with the surface hardness after forging.
  • the outer member 2 integrally has a vehicle body mounting flange 2b to be attached to a knuckle (not shown) on the outer periphery, and double row inner rolling surfaces 4a, 5a of the inner member 1 on the inner periphery. Double row outer rolling surfaces 2a, 2a facing each other are integrally formed. Between these two rolling surfaces, double-row rolling elements 3 and 3 that are circumferentially arranged by a cage 7 are accommodated so as to roll freely.
  • Seals 8 and 9 are attached to the opening of the annular space formed between the outer member 2 and the inner member 1, and leakage of grease sealed inside the bearing to the outside, rainwater and dust from the outside Etc. are prevented from entering the inside of the bearing.
  • the outer member 2 is formed of medium and high carbon steel containing carbon 0.40 to 0.80 wt%, such as S53C, like the hub wheel 4, and at least the double row outer raceway surfaces 2a and 2a have surface hardness by induction hardening. Is cured in the range of 58 to 64 HRC.
  • the wheel bearing apparatus comprised by the double row angular contact ball bearing which used the rolling element 3 as the ball
  • the third generation structure on the driven wheel side is illustrated, but the structure is not limited to this.
  • the structure is a first generation to fourth generation structure including a second generation structure in which a pair of inner rings are press-fitted into a hub ring. May be.
  • the recessed portion 11 is formed on the side surface 6c on the outer side of the wheel mounting flange 6 as shown in an enlarged view in FIG. Specifically, the concave portion 11 is formed in a mortar shape having a flat bottom portion 11b from an outer side surface 6c of the wheel mounting flange 6 through an inclined surface 11a. Then, as shown in FIG. 2D, the outer side surface 6c and the inner side surface 6d of the wheel mounting flange 6 are subjected to turning (cutting) processing (indicated by a two-dot chain line in the drawing) to have desired dimensions and accuracy.
  • the bolt insertion hole 10 is formed in the bottom 11b of the recess 11 by drilling (cutting).
  • the chamfered portion 10a is formed in the opening on the inner side of the bolt insertion hole 10 by turning, while the inclined surface 11a of the recess 11 formed by forging.
  • the chamfered portion is an intermediate body with a forged skin.
  • the process of the chamfered part of the outer side of the bolt insertion hole 10 becomes unnecessary, the processing process and the cutting amount can be reduced, and the cost can be reduced.
  • the “forged skin” is one that has not been subjected to machining such as turning, and includes, for example, one that has been subjected to shot peening or shot blasting for deburring or forging scale removal.
  • a through hole for reducing the weight of the wheel mounting flange or a through hole for fastening the knuckle to the body mounting flange of the outer member is provided. If a recess is formed in advance in a portion corresponding to the through hole before drilling by forging, the forging input weight and the cutting amount of the hub wheel or the outer member can be further reduced.
  • FIG. 3 shows a modification of the recess 11 described above.
  • the recess 11 is formed on the outer side surface 6c of the wheel mounting flange 6, and the recess 12 is formed on the inner side surface 6d. It is a body.
  • the recesses 11 and 12 include flat bottom portions 11b and 12b from the side surfaces 6c and 6d of the wheel mounting flange 6 through the inclined surfaces 11a and 12a.
  • the outer side surface 6c and the inner side surface 6d of the wheel mounting flange 6 are formed with desired dimensions and accuracy by turning (indicated by a two-dot chain line in the figure).
  • the bolt insertion holes 10 are formed in the bottom portions 11b and 12b of the recesses 11 and 12 by drilling. As a result, the forging input weight of the hub wheel 4 can be further reduced, and the cutting range of the side surfaces 6c and 6d of the wheel mounting flange 6 can be reduced to reduce the cutting amount.
  • FIG. 4 shows a modification of the recesses 11 and 12 described above.
  • the recess 13 is basically different from the recess 11 described above only in part in the shape of the bottom 11b, and other parts similar to those of the embodiment described above are denoted by the same reference numerals and detailed description thereof is omitted.
  • the concave portion 13 is formed on the outer side surface 6c of the wheel mounting flange 6 and includes a flat bottom portion 13a from the outer side surface 6c through the inclined surface 11a, and a center hole of the bolt insertion hole 10 at the center portion of the bottom portion 13a. 13b is integrally formed.
  • the outer side surface 6c and the inner side surface 6d of the wheel mounting flange 6 are formed with desired dimensions and accuracy by turning (indicated by a two-dot chain line in the figure).
  • the bolt insertion holes 10 are formed in the bottom portions 13a, 12b of the recesses 13, 12 by drilling.
  • the center hole 13b serves as a guide for drilling, and the machining is facilitated, and the positional deviation of the bolt insertion hole 10 is reduced, and the accuracy is improved.
  • FIG. 5 shows a modification of the recesses 13 and 12 described above.
  • the recess 13 is formed on the outer side surface 6c of the wheel mounting flange 6, and the recess 14 is also formed on the inner side surface 6d.
  • the recesses 13 and 14 are provided with flat bottom portions 13a and 14b from the side surfaces 6c and 6d of the wheel mounting flange 6 through the inclined surfaces 11a and 14a, and the center hole 13b of the bolt insertion hole 10 is formed at the center of the bottom portions 13a and 14b. , 14c are integrally formed.
  • the outer side surface 6c and the inner side surface 6d of the wheel mounting flange 6 are formed with desired dimensions and accuracy by turning (indicated by a two-dot chain line in the figure).
  • the bolt insertion holes 10 are formed in the bottom portions 13a and 14b of the recesses 13 and 14 by drilling.
  • the center holes 13b and 14c serve as a guide for drilling, and the machining is facilitated, and the positional deviation of the bolt insertion hole 10 is reduced and the accuracy is improved.
  • FIG. 6 shows a modification of the recess 11 described above.
  • the concave portion 15 is formed on the outer side surface 6c of the wheel mounting flange 6, and includes a flat bottom portion 15b from the outer side surface 6c of the wheel mounting flange 6 through an inclined surface 15a.
  • the inclined surface 15a is composed of a plurality of circular arc surfaces having the radii of curvature R1 and R2 of R1 to R3, and is smoothly connected to the bottom portion 15b.
  • FIG. 7 is a longitudinal sectional view showing a second embodiment of the wheel bearing device according to the present invention.
  • This embodiment basically differs from the above-described embodiment (FIG. 1) only in the configuration of the inner member, and other parts and parts having the same parts or the same functions as the above-described embodiments have the same reference numerals. The detailed description is omitted.
  • the wheel bearing device shown in FIG. 7 has a configuration called a fourth generation in which the hub wheel 16, the double row rolling bearing 17 and the constant velocity universal joint 18 are unitized.
  • the hub wheel 16 integrally has a wheel mounting flange 6 for mounting a wheel (not shown) at an end portion on the outer side, and has one (outer side) inner rolling surface 4a on the outer periphery and the inner rolling surface.
  • a cylindrical small diameter step portion 16a extending in the axial direction from the surface 4a is formed.
  • Hub bolts 6 a for fixing the wheels are planted at the circumferentially equidistant positions of the wheel mounting flanges 6.
  • the double row rolling bearing 17 is mainly composed of the outer member 2, the inner member 19, and the double row rolling elements 3 and 3.
  • the inner member 19 has double rows of inner rolling surfaces 4a and 21a facing the outer rolling surfaces 2a and 2a of the outer member 2 on the outer periphery.
  • inner rolling surfaces 4a and 21a are integrally formed on the outer periphery of the hub wheel 16, and the other (inner side) inner rolling surface.
  • 21a is integrally formed in the outer periphery of the outer joint member 21 mentioned later.
  • the inner member 19 refers to the hub wheel 16 and the outer joint member 21.
  • the double row rolling elements 3 and 3 are accommodated between these rolling surfaces, respectively, and are hold
  • the hub wheel 16 is made of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and extends from the seal land where the outer seal 8 is in sliding contact to the inner rolling surface 4a and the small diameter step 16a.
  • the surface hardness is set to a range of 58 to 64 HRC by induction hardening.
  • a concavo-convex portion 20 is formed on the inner periphery of the hub wheel 16, and the surface hardness is hardened to a range of 54 to 64HRC by high frequency.
  • the concavo-convex portion 20 is formed in the shape of an iris knurl, and is a cross formed by a plurality of annular grooves formed independently by turning or the like and a plurality of axial grooves formed by broaching or the like substantially orthogonal to each other. It consists of a groove or a cross groove composed of spiral grooves inclined to each other.
  • the tip of the concavo-convex portion 20 has a spire shape such as a triangular shape.
  • the constant velocity universal joint 18 includes an outer joint member 21, a joint inner ring (not shown), a cage, and a torque transmission ball.
  • the outer joint member 21 includes a cup-shaped mouth portion 22, a shoulder portion 23 that forms the bottom portion of the mouth portion 22, and a hollow shaft portion 24 that extends from the shoulder portion 23 in the axial direction.
  • a curved track groove 22a extending in the axial direction is formed on the inner periphery of the track.
  • an inrow portion 24a in which the small-diameter step portion 16a of the hub wheel 16 is fitted via a predetermined radial clearance, and a fitting portion 24b extending from the inrow portion 24a to the end portion.
  • Reference numeral 23a denotes an end cap attached to the inner periphery of the shoulder 23, which prevents leakage of lubricating grease sealed inside the joint and prevents rainwater, dust, etc. from entering the joint from the outside.
  • the shaft portion 24 is fitted into the hub wheel 16 with the shoulder portion 23 of the outer joint member 21 abutting against the end portion of the small-diameter step portion 16a of the hub wheel 16, and the mandrel is attached to the shaft portion 24.
  • the fitting portion 24b is enlarged in diameter by pushing in a diameter expansion jig such as the like, and the fitting portion 24b is bitten into the concavo-convex portion 20 of the hub wheel 16 and caulked so that the hub wheel 16 and the outer joint member 21 are integrally plastic.
  • the forging input weight of the hub wheel 16 can be reduced, and at least the cutting range of the side surface 6c on the outer side of the wheel mounting flange 6 can be reduced so that the cutting amount can be reduced. Can be achieved.
  • the present invention can be applied to a wheel bearing device of a first generation to a fourth generation structure provided with a hub wheel integrally having a wheel mounting flange.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Forging (AREA)

Abstract

L'invention porte sur un dispositif de palier de roue de véhicule et sur un corps intermédiaire, lesquels sont conçus pour réduire des coûts par la diminution du poids d'injection de forgeage et de la quantité d'usinage, et sur un procédé pour leur production. Un dispositif de palier de roue de véhicule a un trou d'insertion de boulon (10) dans lequel un boulon de moyeu (6a) est adapté par pression, et qui est formé dans la direction périphérique externe, ou analogue, d'une bride d'attachement de roue de véhicule (6), dans lequel dispositif : un creux (11) est formé à l'avance par forgeage dans un site dans lequel le trou d'insertion de boulon (10) doit être percé; ce creux (11) est formé sous une forme de bol, qui comporte un plancher plat (11b), et qui s'étend à partir de la surface latérale (6c) de la bride d'attachement de roue de véhicule (6) le long d'une surface en angle (11a); un usinage est effectué de façon à former le trou d'insertion de boulon (10) dans le plancher (11b) et une section chanfreinée dans la section d'ouverture des deux côtés de ce dernier; et l'une ou les deux des sections chanfreinées sont constituées à partir de la surface en angle (11a) du creux (11) formé par forgeage.
PCT/JP2014/074968 2013-09-20 2014-09-19 Dispositif de palier de roue de véhicule et corps intermédiaire, et procédé pour leur production WO2015041355A1 (fr)

Applications Claiming Priority (2)

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JP2013-195138 2013-09-20
JP2013195138A JP6429441B2 (ja) 2013-09-20 2013-09-20 車輪用軸受装置と中間体およびその製造方法

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US10767700B2 (en) * 2017-11-14 2020-09-08 Aktiebolaget Skf Flanged inner ring for wheel hub bearings

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JP2006177466A (ja) * 2004-12-22 2006-07-06 Sanyo Special Steel Co Ltd 自動車の車輪支持用の第３世代のハブ軸受ユニットの外輪およびその製造方法
JP2007016865A (ja) * 2005-07-06 2007-01-25 Nsk Ltd 軸受ユニット外側部材およびその製造方法
JP2012062013A (ja) * 2010-09-17 2012-03-29 Ntn Corp 車輪用軸受装置
JP2012184813A (ja) * 2011-03-07 2012-09-27 Jtekt Corp 車輪用転がり軸受装置の軸部材とその製造方法
JP2013023086A (ja) * 2011-07-21 2013-02-04 Nsk Ltd 車輪支持用ハブユニット及び車輪支持用ハブユニットの製造方法

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JP3546364B2 (ja) * 1994-05-20 2004-07-28 Ｎｔｎ株式会社 ハブユニット軸受外輪のセレーション孔加工方法
JP3526323B2 (ja) * 1994-05-20 2004-05-10 Ｎｔｎ株式会社 ハブユニット軸受外輪の製造方法
JP5088658B2 (ja) * 2006-09-25 2012-12-05 株式会社ジェイテクト ハブユニット
JP6366233B2 (ja) * 2013-07-11 2018-08-01 Ntn株式会社 車輪用軸受装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006177466A (ja) * 2004-12-22 2006-07-06 Sanyo Special Steel Co Ltd 自動車の車輪支持用の第３世代のハブ軸受ユニットの外輪およびその製造方法
JP2007016865A (ja) * 2005-07-06 2007-01-25 Nsk Ltd 軸受ユニット外側部材およびその製造方法
JP2012062013A (ja) * 2010-09-17 2012-03-29 Ntn Corp 車輪用軸受装置
JP2012184813A (ja) * 2011-03-07 2012-09-27 Jtekt Corp 車輪用転がり軸受装置の軸部材とその製造方法
JP2013023086A (ja) * 2011-07-21 2013-02-04 Nsk Ltd 車輪支持用ハブユニット及び車輪支持用ハブユニットの製造方法

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