WO2006059467A1 - 車輪用軸受装置 - Google Patents
車輪用軸受装置 Download PDFInfo
- Publication number
- WO2006059467A1 WO2006059467A1 PCT/JP2005/020521 JP2005020521W WO2006059467A1 WO 2006059467 A1 WO2006059467 A1 WO 2006059467A1 JP 2005020521 W JP2005020521 W JP 2005020521W WO 2006059467 A1 WO2006059467 A1 WO 2006059467A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- inner ring
- wheel
- hub
- diameter step
- bearing device
- Prior art date
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 52
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910000954 Medium-carbon steel Inorganic materials 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000036316 preload Effects 0.000 description 7
- -1 S53C Chemical compound 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 3
- 102220097517 rs876659265 Human genes 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/0015—Hubs for driven wheels
- B60B27/0021—Hubs for driven wheels characterised by torque transmission means from drive axle
- B60B27/0026—Hubs for driven wheels characterised by torque transmission means from drive axle of the radial type, e.g. splined key
-
- 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
-
- 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
-
- 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
- F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
-
- 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
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
- F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
- F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing 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
- F16C35/063—Fixing them on the shaft
-
- 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
-
- 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
Definitions
- the present invention relates to a wheel bearing device for rotatably supporting a wheel of an automobile or the like with respect to a suspension device, and more particularly to a lightweight and compact inner ring that is press-fitted and fixed before assembling a constant velocity universal joint.
- the present invention relates to a wheel bearing device in which the amount of movement is suppressed.
- Wheel bearing devices for vehicles such as automobiles include those for driving wheels and those for driven wheels.
- wheel bearing devices that rotatably support wheels with respect to automobile suspensions are becoming lighter and more compact to improve fuel efficiency, not to mention low cost.
- a wheel bearing device for a drive wheel as shown in FIG. 4 is known.
- This wheel bearing device is referred to as a third generation, and includes an inner member 53 made up of a hub wheel 51 and an inner ring 52, an outer member 54 inserted on the inner member 53, and both members. Double-row rolling elements 55 and 55 accommodated between 53 and 54 are provided.
- the hub wheel 51 integrally has a wheel mounting flange 56 for mounting a wheel (not shown) at one end thereof, an inner rolling surface 51a on the outer periphery, and a cylinder extending in the axial direction from the inner rolling surface 51a.
- a small diameter step portion 51b is formed, and a serration 51c is formed on the inner periphery.
- hub bolts 56a for fixing the wheels are planted at equal circumferential positions of the wheel mounting flanges 56.
- An inner ring 52 having an inner raceway surface 52a formed on the outer periphery is press-fitted into the small-diameter step portion 51b of the hub wheel 51.
- the outer member 54 integrally has a vehicle body mounting flange 54b on the outer periphery, and double row outer rolling surfaces 54a, 54a are formed on the inner periphery. Double row rolling elements 55, 55 are movably accommodated between the inner rolling surfaces 51a, 52a facing the double row outer rolling surfaces 54a, 54a.
- the outer joint member 58 constituting the constant velocity universal joint 57 has a stem portion 60 extending in the axial direction from the shoulder portion 59, and is engaged with the selection 51c of the hub wheel 51 on the outer periphery.
- a selection 60a and a male screw 60b are formed at the tip thereof.
- Outer joint member 58 Is fitted into the hub wheel 51 until its shoulder 59 is abutted against the inner ring 52, and a fixing nut 61 is fastened to the male screw 60b so that the outer joint member 58 and the hub wheel 51 are detachably integrated. .
- the normal bearing in order to increase the rigidity of the device and improve the durability of the bearing portion, the normal bearing is set to have a negative clearance.
- the bearing preload is controlled by setting the fixing nut 61 to a predetermined tightening torque.
- the inner ring 52 is only press-fitted into the hub ring 51, it can be used for transportation and assembly lines at automobile manufacturers.
- the constant velocity universal joint 5 7 is assembled, if rotation or vibration is applied, the inner ring 52 moves and the preload set in the initial stage is released, which may cause looseness in the bearing.
- a wheel bearing device as shown in FIG. 6 has already been adopted.
- a small-diameter step portion 51b is formed on the outer periphery of the hub wheel 51 ', and an end portion of the small-diameter step portion 51b is plastically deformed radially outward to form a caulking portion 51d.
- the caulking portion 51d prevents the inner ring 62 from coming off in the axial direction.
- This type of structure is called a self-retaining type and has a feature that it can prevent preload loss over a long period of time.
- the same parts as those in the conventional wheel bearing device (Fig. 4) described above are denoted by the same reference numerals, and redundant description is omitted here.
- a large-diameter step portion 62a having a large inner diameter is formed at the inner end portion of the inner ring 62, and a caulking portion 51d is accommodated in the large-diameter step portion 62a.
- the end surface of the cured inner ring 62 is in contact with the shoulder 59 of the outer joint member 58. This As a result, the caulking portion 51d that has not been cured is not brought into contact with the shoulder portion 59, so that the caulking portion 51d can be prevented from being worn.
- Patent Document 1 Japanese Patent Laid-Open No. 9 164803
- the end portion of the small diameter step portion 51b is plastically deformed (oscillating caulking) radially outward to form the caulking portion 51d.
- the caulking tool (not shown) interferes with the large-diameter step portion 62a of the inner ring 62, so that the caulking work is difficult.
- the outer diameter portion of the crimping portion 51d cannot be constrained, it is a high caulking operation with an element that plastically deforms the end portion of the small diameter step portion 51b only in the axial direction.
- the inner diameter of the inner ring 62 is expanded due to plastic deformation in the radial direction also in the vicinity of the caulking portion 51d of the small diameter step portion 5 lb, and a large hoop stress is generated on the outer diameter of the inner ring 62. I cannot deny.
- the hoop stress generated in the inner ring 62 is increased, the strength and durability of the inner ring 62 are significantly hindered.
- the variation in the base material hardness of the hub wheel 51' or the end of the small-diameter step 51b It is necessary to strictly control the axial variation of the hardened layer caused by induction hardening. In this case, manufacturing costs are increased, so it is not a good idea to suppress plastic deformation. Therefore, the current situation is that the hoop stress generated in the inner ring 62 is generally reduced by increasing the thickness of the inner ring 62.
- the present invention has been made in view of such a conventional problem, and is lightweight and compact, and the amount of movement of the inner ring that is press-fitted and fixed to the hub ring before the constant velocity universal joint is assembled. It aims at providing the bearing device for wheels which aimed at suppression.
- the invention described in claim 1 includes an outer member having a double row outer rolling surface formed on the inner periphery, and a wheel mounting flange at one end.
- a cylindrical small diameter step is formed on the outer periphery and extending axially from this wheel mounting flange.
- a hub ring having an inner circumference formed with a serration, and an inner ring press-fitted into a small-diameter step portion of the hub ring, and a double-row inner raceway facing the double-row outer raceway on the outer circumference.
- the formed inner member, a double-row rolling element accommodated between the rolling surfaces of the inner member and the outer member via a cage, and a constant velocity universal joint are configured.
- An outer joint member integrally including a shoulder portion that abuts against an end surface of the inner ring and a stem portion that extends in an axial direction from the shoulder portion and is fitted into the hub wheel via a serration.
- an annular convex portion is formed on the outer periphery of the inboard side end of the small-diameter step portion of the hub wheel, and the inner ring
- the inner circumference of the end of the inboard side corresponds to the projection and is slightly larger than the projection
- An annular recess having a step is formed, and the recess is engaged with the protrusion so that the end face of the inner ring on the upper board side contacts the shoulder of the hub ring, and the end face of the inner ring on the inboard side
- the inner ring is press-fitted and fixed to the small-diameter step portion in a state where the inner ring protrudes to the inboard side from the end surface of the small-dia
- a wheel bearing device including an inner member in which an inner ring is press-fitted into a small-diameter step portion of a hub ring, and a constant velocity universal joint that is separably coupled to the hub ring via a serration
- An annular convex portion is formed on the outer periphery of the end portion on the inboard side of the small-diameter step portion of the hub wheel, and corresponds to the convex portion on the inner periphery of the end portion on the inboard side of the inner ring, which is slightly larger than the convex portion.
- An annular recess having a step is formed, and the recess is engaged with the protrusion so that the end surface of the inner ring on the upper board side comes into contact with the shoulder of the hub wheel, and the end surface of the inner ring on the inboard side has a small diameter.
- the inner ring is press-fitted and fixed to the small-diameter stepped part with the inner ring protruding from the end face of the stepped part. Even if it moves, it can be stopped by the convex part of the hub wheel, and the inboard side Seal can be prevented from falling between the inner ring of the inner raceway surface and the rolling element.
- the inner ring is press-fitted and secured to the hub ring, which is light and compact and has a large hoop stress in the inner ring, as in the conventional structure where the inner ring is fixed by the crimped part. It is possible to provide a wheel bearing device that achieves the above.
- the hub wheel is made of medium carbon steel containing 0.40 to 0.80% by weight of carbon, and one of the double row inner rolling surfaces is directly on the outer periphery.
- the inner ring is made of high carbon chrome bearing steel and hardened by induction hardening from the inner rolling surface to the small-diameter stepped portion and induction hardened to a surface hardness of 58-64HRC.
- the core is hardened in the range of 58 to 64 HRC, and the projections and recesses are formed by cutting. Therefore, the dimensional accuracy of these projections and recesses can be easily regulated within a predetermined range. In addition, there is no plastic deformation due to the press-fitting of the inner ring.
- the inner ring is press-fitted into the small-diameter step portion through a 10-50 zm shim opening, and the convex portion is formed of the small-diameter step portion. If it is formed at a step of 60 to 120 / im in diameter with respect to the outer diameter, the inner ring will be able to get over the convex part by elastic deformation and press-fit into the small-diameter step part without causing excessive stress.
- the convex part can engage with the concave part to press-fit the inner ring in the axial direction.
- the hub wheel is connected to the stem.
- the cylinder can be supported by the part, and the rigidity of the hub wheel can be increased.
- the axial clearance between the concave portion and the convex portion in a state where the end surface of the inner ring on the outboard side is in contact with the shoulder portion of the hub ring. Is set to be smaller than the protruding amount of the end face on the inboard side of the inner ring with respect to the end face of the small-diameter stepped portion, after the constant velocity universal joint is assembled, it is slightly tightened with the fixing nut. The moved inner ring moves in the axial direction, and the bearing preload can be maintained at the initial setting.
- the wheel bearing device integrally has an outer member having a double row outer raceway formed on the inner periphery and a wheel mounting flange on one end, and the wheel mounting on the outer periphery.
- a cylindrical small diameter step extending in the axial direction from the flange is formed and a selection is formed on the inner periphery.
- An outer joint member that includes an abutting shoulder portion and a stem portion that extends in an axial direction from the shoulder portion and is fitted into the hub wheel via a serration, and the hub wheel and the outer joint member
- an annular convex portion is formed on the outer periphery of the end portion on the inboard side of the small-diameter step portion of the hub wheel, and the inner ring has an inner end portion on the inboard side.
- a ring-shaped concave portion corresponding to the convex portion and having a slightly larger step than the convex portion is formed on the circumference.
- the concave portion is engaged with the convex portion so that the end surface on the outboard side of the inner ring is brought into contact with the shoulder portion of the hub ring, and the end surface on the inboard side of the inner ring is more than the end surface of the small diameter step portion. Since the inner ring is press-fitted and fixed to the small-diameter stepped part in a state of protruding to the inboard side, even if the inner ring moves during transportation or before assembling the constant velocity universal joint on the assembly line of an automobile manufacturer, It can be stopped by the convex part of the hub wheel, and the seal on the inboard side can be prevented from falling between the inner rolling surface of the inner ring and the rolling element.
- the constant velocity universal joint is assembled, it is tightened with a fixing nut. Can be maintained. Furthermore, since the end face on the inboard side of the inner ring protrudes more toward the inboard side than the end face of the small-diameter stepped portion, a sufficient abutting area with the shoulder portion of the outer joint member can be secured, and the surface pressure of the abutting surface is increased. It can be suppressed to prevent wear and abnormal noise in the actual vehicle. Therefore, the inner ring is press-fitted and secured to the hub ring, which is light and compact and has a large hoop stress in the inner ring, as in the conventional structure where the inner ring is secured by the crimped part. It is possible to provide a wheel bearing device that achieves the above.
- a body mounting flange is integrally formed on the outer periphery, an outer member having a double row outer rolling surface formed on the inner periphery, and a wheel mounting flange is integrally formed on one end, and the double row outer rolling is formed on the outer periphery.
- An inner member comprising an inner ring that is press-fitted into a small-diameter step portion of the ring and has an inner ring formed on the outer periphery and facing the outer rolling surface of the double row, the inner member and the outer A double-row rolling element accommodated between the rolling surfaces of the member via a cage, and a constant velocity universal joint, and a shoulder that abuts against the end face of the inner ring, and the shoulder
- An outer joint member integrally extending to the hub wheel and inserted into the hub wheel via a serration, and the hub wheel and the outer joint member are detachably coupled to each other.
- an annular convex portion is formed on the outer periphery of the end portion on the inboard side of the small-diameter step portion of the hub wheel, and the convex portion is formed on the inner periphery of the end portion on the inboard side of the inner ring.
- an annular recess having a step slightly larger than the projection is formed. The end face on the outboard side of the inner ring is brought into contact with the shoulder portion of the hub ring, and the end face on the inboard side of the inner ring protrudes more inward from the end face of the small diameter step portion.
- the inner ring is press-fitted and fixed to the small diameter step.
- FIG. 1 is a longitudinal sectional view showing an embodiment of a wheel bearing device according to the present invention
- FIG. 2 is an enlarged view of a main part of FIG. 1
- FIG. 3 (a) is a main part of a hub wheel according to the present invention
- FIG. 3 (b) is an enlarged view of a main part showing an inner ring according to the present invention.
- the side closer to the outside of the vehicle in the assembled state is referred to as the outboard side (left side in the drawing), and the side closer to the center is referred to as the import side (right side in the drawing).
- This wheel bearing device is referred to as the third generation on the drive wheel side, and is an inner member 1 and an outer member 10, and a double row rolling element housed between the members 1 and 10 so as to roll freely. (Balls) 6 and 6 are provided, and a constant velocity universal joint 20 is connected to the inner member 1 so that torque can be transmitted.
- the inner member 1 includes a hub ring 2 and an inner ring 3 press-fitted into the hub ring 2.
- the hub wheel 2 integrally has a wheel mounting flange 4 for mounting a wheel (not shown) at an end portion on the outboard side, and the wheel is fixed at a circumferentially equidistant position of the wheel mounting flange 4.
- Hub bolt 5 is installed for this purpose.
- the outer periphery of the hub wheel 2 is formed with an inner rolling surface 2a and a cylindrical small diameter step portion 2b extending in the axial direction from the inner rolling surface 2a, and a serration (or spline) 2c is formed on the inner periphery. Is formed.
- the inner ring 3 has an inner rolling surface 3a on the outer periphery.
- the hub wheel 2 is press-fitted into the small-diameter step 2b of the hub wheel 2 through a predetermined shim opening.
- the outer member 10 integrally has a vehicle body mounting flange 10b for mounting to a vehicle body (not shown) on the outer periphery, and double row outer rolling surfaces 10a, 10a are formed on the inner periphery. Then, double-row rolling elements 6, 6 are accommodated between the respective rolling surfaces 10a, 2a and 10a, 3a, and these double-row rolling elements 6, 6 are freely rollable by cages 7, 7. Is held in. In addition, seals 8 and 9 are attached to the end of the outer member 10 to prevent leakage of lubricating grease sealed in the bearing and external force rainwater and dust from entering the bearing.
- the hub wheel 2 is formed of medium carbon steel containing 0.44-0.80% by weight of carbon, such as S53C, and the seal land portion where the seal 8 comes into sliding contact with the inner rolling surface 2a on the board side. Further, the hardened layer 11 is formed in the range of 58 to 64 HRC by induction hardening over the small diameter step portion 2b (indicated by cross hatching in the figure). As a result, the seal land that is the base of the wheel mounting flange 4 has sufficient mechanical strength against the rotational bending load that is applied to the wheel mounting flange 4 if the wear resistance is improved. The durability of the hub wheel 2 is further improved.
- the inner ring 3 is made of high carbon chrome bearing steel such as SUJ2, and is hardened in the range of 58 to 64HRC to the core part by quenching.
- the outer member 10 is made of medium carbon steel containing 0.40 to 0.80% by weight of carbon such as S53C, and includes seals 8 and 9 including double row outer raceways 10a and 10a.
- the surface hardness is hardened in the range of 58 to 64HRC by induction hardening over the inner diameter surface of the end.
- the mating surface on which the seals 8 and 9 are mounted may be hardened by induction hardening.
- the constant velocity universal joint 20 includes an outer joint member 21, a joint inner ring, a cage, and a torque transmission ball (not shown).
- the outer joint member 21 has a cup-shaped mouth portion 22, a shoulder portion 23 that forms the bottom portion of the mouse portion 22, and a stem portion 24 that extends in the axial direction from the shoulder portion 23.
- the stem portion 24 is formed with a selection (or spline) 24a that engages with the selection 2c of the hub wheel 2 on its outer peripheral surface, and a male screw 24b at the end of the selection 24a.
- the selection 24a is provided with a twist angle inclined by a predetermined angle with respect to the axis.
- Selection 24a of stem 24 is press-fitted into selection 2c of hub wheel 2.
- the stem portion 24 is inserted into the hub wheel 2 until the shoulder portion 23 of the outer joint member 21 contacts the end surface of the inner ring 3.
- a desired preload is applied to the fitting portions of the selections 2c and 24a.
- the fixing nut 26 is fastened with a predetermined tightening torque via the plate 25 abutting on the outer end surface of the hub wheel 2, and the hub wheel 2 and the outer joint member 21 are coupled so as to be separable in the axial direction.
- the base portion of the stem portion 24 is fitted to the inner periphery of the hub wheel 2 via a predetermined radial clearance.
- the hub wheel 2 is cylindrically supported at the base portion, and the force S for increasing the rigidity of the hub wheel 2 can be achieved.
- the outer joint member 21 is made of medium carbon steel containing 0.40 to 0.80 wt% of carbon such as S53C, and has a track groove (not shown) formed on the inner periphery of the mouth portion 22.
- the surface hardness is hardened to a range of 58 to 64 HRC by induction hardening from the shoulder portion 23 to the base portion of the stem portion 24.
- an annular convex portion 12 is formed on the outer diameter of the end portion of the small diameter step portion 2 b in the hub wheel 2, and this convex portion
- An annular recess 13 having a step slightly larger than the protrusion 12 is formed on the inner periphery of the end of the inner ring 3 corresponding to 12 on the inboard side. Therefore, the inner ring 3 elastically deforms and climbs over the convex part 12 of the small-diameter stepped part 2b, and keeps a predetermined shim opening (10 to 50 / m) until the small end surface 3b abuts the shoulder part 2d of the hub ring 2. It is press-fitted through.
- the convex part 12 of the hub wheel 2 and the concave part 13 of the inner ring 3 are engaged, and the inner ring 3 is press-fitted and fixed to the hub wheel 2 in the axial direction with a clearance of about 0 to 100 ⁇ : ⁇ .
- the end face on the inboard side of the inner ring 3 is set so as to protrude to the inboard side from the end face of the small diameter step portion 2b. That is, with the end surface of the inner ring 3 on the outboard side in contact with the shoulder 2d of the hub wheel 2, the axial clearance between the concave portion 13 and the convex portion 12 is in the inner ring 3 with respect to the end surface of the small diameter step 2b. It is set to be smaller than the protruding amount of the end face on the board side.
- the convex portion 12 of the small-diameter step portion 2b in the hub wheel 2 becomes a fitting surface of the inner ring 3 as shown in an enlarged view of Fig. 3 (a) after the small-diameter step portion 2b is cured.
- the outer diameter of the small-diameter step 2b is formed so as to have a step 2H1 of 60 to 120 ⁇ m in diameter by grinding.
- the concave portion 13 of the inner ring has a step 2H2 having a diameter of at least 120 zm by cutting such as grinding with respect to the inner diameter, as shown in an enlarged view in FIG. It is formed to stick (H1 ⁇ H2).
- the step 2H2 of the recess 13 is set to be slightly larger than the protrusion 12, the area of the end face of the inner ring 3, that is, the abutting area with the shoulder 23 of the outer joint member 21 is sufficiently secured. In addition, it is possible to suppress wear on the actual vehicle and generation of abnormal noise by suppressing the surface pressure of the butt surfaces.
- the distance L1 from the shoulder 2d force of the hub ring 2 to the convex part 12 is set to be the same dimension as the distance L2 from the small end surface 3b of the inner ring 3 to the concave part 13 or slightly larger than that. (LI ⁇ L2).
- the projection 12 and the recess 13 are formed by cutting such as grinding, so that the dimensional accuracy of the projection 12 and the recess 13 is increased. It can be easily regulated within a predetermined range, and the convex portion 12 is not plastically deformed by the press-fitting of the inner ring 3. In addition, the inner ring 3 gets over the convex part 12 and is pressed into the small-diameter step part 2b by elastic deformation without generating a large hoop stress.
- the inner ring 3 is press-fitted into the small-diameter step portion 2b of the hub wheel 2, the inner ring 3 is axially engaged by the engagement of the convex part 12 of the hub wheel 2 and the concave part 13 of the inner ring 3.
- the inner ring 3 is moved and the lip (not shown) on the inboard side slides before the constant velocity universal joint 20 is assembled during transportation or in the assembly line of an automobile manufacturer. It is possible to prevent falling off the surface and falling between the inner rolling surface 3a of the inner ring 3 and the rolling element 6. Therefore, since the constant velocity universal joint 20 is assembled and then tightened with the fixing nut 26, the slightly moved inner ring 3 moves in the axial direction, and the bearing preload can be maintained at the initial setting. Of course, the hoop stress is not generated in the inner ring 3 as in the conventional swing caulking type, and the durability can be improved.
- a so-called staking is formed by attaching a plurality of burrs to the outer periphery of the end of the small diameter step by plastic deformation.
- Means for fixing the shaft in the axial direction Alternatively, a large diameter step is formed on the inner ring, an annular groove is formed on a small diameter step of the hub wheel corresponding to the large diameter step, and a retaining ring is attached to the annular groove so that the inner ring moves in the axial direction.
- a means for fixing to the surface can be considered.
- the inner ring fixing means according to the present invention is excellent both in terms of strength, durability and reliability, and in terms of cost.
- the wheel bearing device referred to as the third generation in which the inner raceway surface 2a is directly formed on the outer periphery of the hub wheel 2 is illustrated, but the wheel bearing device according to the present invention has such a structure.
- a first generation or second generation structure in which a pair of inner rings are press-fitted into a small diameter step portion of the hub ring may be used.
- the double-row angular ball bearing using the rolling elements 6 and 6 as an example is illustrated, the present invention is not limited to this, and a double-row circular thread using a tapered roller as the rolling element, or a roller bearing may be used.
- the wheel bearing device according to the present invention can be applied to a first-generation to third-generation wheel bearing device on the drive wheel side in which an inner ring is press-fitted into a small-diameter step portion of a hub wheel.
- FIG. 1 is a longitudinal sectional view showing an embodiment of a wheel bearing device according to the present invention.
- FIG. 3 (a) is an enlarged view of a main part showing a hub wheel according to the present invention. (b) is a longitudinal sectional view showing an inner ring according to the present invention.
- FIG. 4 is a longitudinal sectional view showing a conventional wheel bearing device.
- FIG. 5 is an explanatory view showing a problem state in a conventional wheel bearing device, in which (a) shows an initial state in which the inner ring is in contact with the shoulder portion of the hub ring. (B) shows the state where the inner ring has moved. (C) shows the state where the inner ring is pushed in again.
- FIG. 6 is a longitudinal sectional view showing another conventional wheel bearing device. Explanation of symbols
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112005002978T DE112005002978T5 (de) | 2004-12-02 | 2005-11-09 | Lagervorrichtung für ein Rad eines Fahrzeugs |
US11/792,012 US7866893B2 (en) | 2004-12-02 | 2005-11-09 | Bearing apparatus for a wheel of vehicle |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004350178A JP4643237B2 (ja) | 2004-12-02 | 2004-12-02 | 車輪用軸受装置 |
JP2004-350178 | 2004-12-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006059467A1 true WO2006059467A1 (ja) | 2006-06-08 |
Family
ID=36564904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/020521 WO2006059467A1 (ja) | 2004-12-02 | 2005-11-09 | 車輪用軸受装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7866893B2 (ja) |
JP (1) | JP4643237B2 (ja) |
DE (1) | DE112005002978T5 (ja) |
WO (1) | WO2006059467A1 (ja) |
Cited By (4)
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JP2009083521A (ja) * | 2007-09-27 | 2009-04-23 | Jtekt Corp | 車輪用軸受装置 |
US20120216407A1 (en) * | 2005-12-05 | 2012-08-30 | Ntn Corporation | Method of manufacturing wheel support bearing assembly |
EP2034202A3 (en) * | 2007-08-28 | 2012-10-03 | JTEKT Corporation | Resin cage for ball bearing |
CN111734745A (zh) * | 2019-03-25 | 2020-10-02 | 斯凯孚公司 | 集成的轴承元件和悬架立柱模块及其制造方法 |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
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US7883272B2 (en) | 2004-10-08 | 2011-02-08 | Ntn Corporation | Wheel support bearing assembly |
EP1729021B1 (en) | 2005-06-02 | 2010-01-20 | Ntn Corporation | Wheel support bearing assembly |
JP4526455B2 (ja) * | 2005-07-14 | 2010-08-18 | Ntn株式会社 | 車輪用軸受装置およびその加締加工方法 |
JP4947963B2 (ja) * | 2005-12-05 | 2012-06-06 | Ntn株式会社 | 車輪用軸受装置およびその製造方法 |
WO2007083688A1 (ja) * | 2006-01-20 | 2007-07-26 | Jtekt Corporation | ハブユニットの製造方法およびハブユニット |
JP4655016B2 (ja) * | 2006-09-25 | 2011-03-23 | 株式会社ジェイテクト | 車輪用転がり軸受装置 |
JP2008175262A (ja) | 2007-01-17 | 2008-07-31 | Ntn Corp | 車輪用軸受装置およびその製造方法 |
JP5067787B2 (ja) * | 2007-02-06 | 2012-11-07 | Ntn株式会社 | インホイールモータ駆動装置 |
DE102008025502A1 (de) * | 2008-05-28 | 2009-12-03 | Ab Skf | Getriebelager-Montageeinheit und Getriebelager |
FR2988023A1 (fr) * | 2012-03-16 | 2013-09-20 | Sodetal Sas | Fil a scier, methode de fabrication d'un tel fil et utilisation |
CN108116158A (zh) * | 2016-11-30 | 2018-06-05 | 长城汽车股份有限公司 | 汽车轮毂轴承及汽车车轮和汽车 |
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- 2005-11-09 DE DE112005002978T patent/DE112005002978T5/de not_active Withdrawn
- 2005-11-09 WO PCT/JP2005/020521 patent/WO2006059467A1/ja active Application Filing
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JPH09164803A (ja) * | 1995-12-15 | 1997-06-24 | Nippon Seiko Kk | 駆動輪支持用ハブユニット |
JP2004169927A (ja) * | 1997-08-28 | 2004-06-17 | Nsk Ltd | 車輪支持用転がり軸受ユニット |
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US20120216407A1 (en) * | 2005-12-05 | 2012-08-30 | Ntn Corporation | Method of manufacturing wheel support bearing assembly |
US8745874B2 (en) * | 2005-12-05 | 2014-06-10 | Ntn Corporation | Method of manufacturing wheel support bearing assembly |
EP2034202A3 (en) * | 2007-08-28 | 2012-10-03 | JTEKT Corporation | Resin cage for ball bearing |
JP2009083521A (ja) * | 2007-09-27 | 2009-04-23 | Jtekt Corp | 車輪用軸受装置 |
US8661679B2 (en) | 2007-09-27 | 2014-03-04 | Jtekt Coporation | Bearing device for vehicle and method of manufacturing the same |
CN111734745A (zh) * | 2019-03-25 | 2020-10-02 | 斯凯孚公司 | 集成的轴承元件和悬架立柱模块及其制造方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2006161856A (ja) | 2006-06-22 |
US7866893B2 (en) | 2011-01-11 |
JP4643237B2 (ja) | 2011-03-02 |
DE112005002978T5 (de) | 2007-11-22 |
US20080310784A1 (en) | 2008-12-18 |
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