WO2008047472A1 - Bearing device for wheel - Google Patents

Bearing device for wheel Download PDF

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Publication number
WO2008047472A1
WO2008047472A1 PCT/JP2007/001121 JP2007001121W WO2008047472A1 WO 2008047472 A1 WO2008047472 A1 WO 2008047472A1 JP 2007001121 W JP2007001121 W JP 2007001121W WO 2008047472 A1 WO2008047472 A1 WO 2008047472A1
Authority
WO
WIPO (PCT)
Prior art keywords
row
wheel
bearing device
rolling
wheel bearing
Prior art date
Application number
PCT/JP2007/001121
Other languages
French (fr)
Japanese (ja)
Inventor
Takayuki Norimatsu
Original Assignee
Ntn Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2006282760A external-priority patent/JP2008101650A/en
Priority claimed from JP2006282761A external-priority patent/JP2008101651A/en
Application filed by Ntn Corporation filed Critical Ntn Corporation
Publication of WO2008047472A1 publication Critical patent/WO2008047472A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/49Bearings with both balls and rollers
    • F16C19/492Bearings with both balls and rollers with two or more rows with angular contact
    • F16C19/495Bearings with both balls and rollers with two or more rows with angular contact with two rows
    • F16C19/497Bearings with both balls and rollers with two or more rows with angular contact with two rows in O-arrangement
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/70Diameters; Radii
    • F16C2240/80Pitch circle diameters [PCD]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00Articles relating to transporting
    • F16C2326/01Parts of vehicles in general
    • F16C2326/02Wheel hubs or castors

Definitions

  • the present invention relates to a wheel bearing device that rotatably supports a wheel of an automobile or the like, and more particularly to a wheel bearing device that is reduced in weight and increased in rigidity.
  • wheel bearing devices for supporting wheels of automobiles and the like support a hub wheel for mounting a wheel rotatably via a rolling bearing, and there are a drive wheel and a driven wheel.
  • the inner ring rotation method is generally used for driving wheels, and both the inner ring rotation method and outer ring rotation method are used for driven wheels.
  • a double-row angular contact ball bearing that has a desired bearing rigidity, exhibits durability against misalignment, and has a low rotational torque from the viewpoint of improving fuel efficiency is often used.
  • double row tapered roller bearings are used in vehicles with heavy vehicle body weight such as off-road force and trucks.
  • the wheel bearing device has a structure called a first generation in which a wheel bearing composed of a double-row anguilla ball bearing or the like is fitted between a knuckle and a hub wheel constituting a suspension device.
  • Second generation structure with body mounting flange or wheel mounting flange formed directly on the outer periphery of the outer member, or third generation structure with one inner raceway formed directly on the outer periphery of the hub wheel, or hub It is roughly divided into the 4th generation structure in which the inner rolling surface is directly formed on the outer circumference of the outer joint member of the wheel and constant velocity universal joint.
  • the wheel bearing device shown in Fig. 17 has a lightweight fourth-generation structure that is compact and has a hub wheel 50, a double row rolling bearing 51, and a constant velocity universal joint 52. It is configured as a unit.
  • the double row rolling bearing 51 includes an outer member 53, an inner member 54, and a plurality of poles 55 and tapered rollers 56 accommodated between the two members.
  • the side closer to the outside of the vehicle in the state assembled to the vehicle is the outer side (left side of the drawing), and the side closer to the center is the inner side (right side of the drawing). Side).
  • the outer member 53 is integrally provided with a vehicle body mounting flange 53c attached to a knuckle constituting a suspension device (not shown) on the outer periphery, and a double row outer rolling surface 53a on the inner periphery. 5 3 b is formed.
  • the diameter of the outer rolling surface 53a on the outer side is set to be smaller than the diameter of the outer rolling surface 53b on the inner side.
  • the inner member 5 4 includes a hub wheel 50, an outer joint member 5 8, which will be described later, integrally formed with the hub wheel 50, and a separate inner ring 5 press-fitted into the outer joint member 5 8. 7 and.
  • the hub wheel 50 has integrally a wheel mounting flange 50b for mounting a wheel (not shown) at one end, and double row outer rolling surfaces 5 3a, 5 3 on the outer periphery.
  • the inner side rolling surface 50 0a opposite to the outer side outer rolling surface 5 3 a is directly formed, and the outer race of the inner ring 5 7 has double row outer rolling surfaces 5 3 a, 5 3
  • An inner rolling surface 5 7 a opposite to the outer rolling surface 5 3 b on the inner side of b is formed.
  • the constant velocity universal joint 52 has an outer joint member 58 comprising a cup-shaped mouth portion 59 and a shoulder portion 60 forming the bottom of the mouth portion 59.
  • the outer joint member A curved track groove 5 8 a is formed on the inner periphery of 58.
  • the inner ring 5 7 is press-fitted into the outer diameter of the mouse part 59 and is fixed in the axial direction by a retaining ring 61.
  • Such a wheel bearing device has a structure in which the inner ring 5 7 is fixed to the mouse part 59 of the outer joint member 58, so that it is certainly compact in the axial direction.
  • the outer diameter itself of the outer member 53 is increased, which not only hinders weight reduction, but is also undesirable due to a design change of peripheral parts such as a knuckle.
  • a wheel bearing device as shown in Fig. 18 is known as a solution to these problems.
  • This wheel bearing device has a vehicle body mounting flange 6 2 c integrally attached to a knuckle (not shown) on the outer periphery, and a double row outer rolling surface 6 2 a on the inner periphery. 6 2 b
  • the outer member 6 2 is formed on one end and the wheel mounting flange 6 3 for attaching the wheel (not shown) at one end is integrated into the outer periphery.
  • Inner rolling surface 6 4 a opposite to the outer rolling surface 6 4 a and small diameter step portion 6 4 b extending axially from this inner rolling surface 6 4 a Is formed on the hub wheel 6 4 formed with the outer ring 6 and the small-diameter step portion 6 4 b of the hub wheel 6 4.
  • An inner member 6 6 composed of an inner ring 6 5 formed with an inner rolling surface 6 5 a facing the running surface 6 2 b, and double-row poles 6 7, 6 accommodated between these rolling surfaces 8 and these double-row poles 6 7 and 6 8 It is composed of double-row anguillar ball bearings with cages 69, 70 that can be moved freely.
  • the inner ring 65 is fixed in the axial direction by a caulking portion 6 4 c formed by plastic deformation of the small-diameter stepped portion 6 4 b of the hub wheel 6 4 radially outward.
  • the seals 7 1 and 7 2 are attached to the opening of the annular space formed between the outer member 62 and the inner member 66, and leakage of the lubricating grease sealed inside the bearing Prevents rainwater and dust from entering the bearing.
  • the pitch circle diameter D1 of the pole 67 on the one side of the counter is set to be larger than the pitch circle diameter D2 of the pole 68 on the side of the inner side.
  • the inner raceway surface 6 4 a of the hub wheel 6 4 has a larger diameter than the inner raceway surface 65 5 a of the inner race 65
  • the outer raceway surface on the outer side of the outer member 62 is also adjusted 6 2 a has a larger diameter than the outer rolling surface 6 2 b on the inner side.
  • the outer side pole 6 7 is accommodated more than the inner side pole 6 8. In this way, by setting each pitch circle diameter D 1 and D 2 to D 1> D 2, the vehicle is stationary. In addition to improving the rigidity even during turning, it is possible to extend the life of the wheel bearing device (for example, see Patent Document 2).
  • Patent Document 1 Japanese Patent Laid-Open No. 1-9-9 30 8
  • Patent Document 2 Japanese Patent Laid-Open No. 2 0 0 4 _ 1 0 8 4 4 9
  • the pitch circle diameter D1 of the outer-side pole 6 7 rows is set larger than the pitch circle diameter D2 of the inner-side pole 68 rows, Accordingly, the inner raceway surface 6 4 a of the hub wheel 6 4 has a larger diameter than the inner raceway surface 6 5 a of the inner race 65.
  • the rigidity of the bearing row on the one side of the tower can be improved while avoiding an increase in the size of the device, and the service life of the wheel bearing device can be extended.
  • the load applied to each bearing row on the inner _ side and the outer side is different from each other, and the load applied to the bearing row on the inner side is generally larger than the load applied to the bearing row on the outer side. is there.
  • the basic load rating of the inner side bearing row becomes smaller than the basic load rating of the outer side bearing row, resulting in a short life.
  • the present invention has been made in view of such circumstances, and simultaneously solves the conflicting problems of light weight and compactness and high rigidity of the device, and at the same time, has improved strength and durability.
  • An object of the present invention is to provide a bearing device for a vehicle.
  • the present invention includes an outer member integrally having a vehicle body mounting flange to be attached to a knuckle on the outer periphery, and a double row outer rolling surface formed on the inner periphery.
  • a hub wheel having a wheel mounting flange for mounting a wheel at one end is integrally formed, a hub wheel having a small-diameter step portion formed on the outer periphery, and press-fitted into the small-diameter step portion of the hub wheel, and the double row outer rolling on the outer periphery.
  • An inner member composed of at least one inner ring formed with an inner rolling surface facing the surface, and a double row accommodated in a freely rolling manner between both rolling surfaces of the inner member and the outer member.
  • one of the double row rolling element rows is constituted by a pole, and the other.
  • the number of poles in the pole row is set to be larger than the number of rollers in the tapered roller row.
  • the row is composed of poles
  • the other rolling element row is composed of tapered rollers
  • the number of poles in the pole row is set larger than the number of rollers in the tapered roller row, so that the rotational torque of the bearing is increased. It is possible to solve the conflicting issues of compactness and high rigidity at the same time.
  • the pitch circle diameter of the outer rolling element row of the double row rolling element rows is set larger than the pitch circle diameter of the inner rolling element row. May be. Claim 2
  • the pitch circle diameter of the inner one rolling element row of the double row rolling element rows is set larger than the pitch circle diameter of the outer rolling element row. May be. Claim 3
  • an outer-side inner rolling surface is formed directly on the outer periphery of the hub wheel, and the small-diameter step portion extending in the axial direction from the inner-rolling surface is formed. If the inner ring on the inner side is press-fitted into the small diameter step portion through a predetermined shim opening, the device can be made lighter and more compact. ⁇ ⁇ ⁇ Claim 5
  • the small-diameter step portion of the hub ring is connected to the Can be formed in any shape, and processability can be improved.
  • the wheel bearing device has a vehicle body mounting flange for being attached to the knuckle on the outer periphery, and an outer side in which a double row outer rolling surface is formed on the inner periphery.
  • a hub wheel having a wheel mounting flange for mounting a wheel at one end, a small-diameter step portion formed on the outer periphery, and a press fit into the small-diameter step portion of the hub wheel, and the double row on the outer periphery.
  • one of the double row rolling element rows is constituted by a pole, and the other rolling element row is constituted by a tapered roller.
  • the number of poles in the pole row is set to be larger than the number of rollers in the tapered roller row, the conflicting problems of light weight and compactness and high rigidity of the device can be solved at the same time.
  • low torque can be achieved and the inner shaft Even summer greater than the load which the load applied to the column is applied to the bearing column of the outer side can be a child life equal to or higher. Therefore, it is possible to provide a wheel bearing device that can realize a design without waste and has improved strength-durability.
  • a body mounting flange that can be attached to the knuckle on the outer periphery is integrated, an outer member with a double row outer raceway formed on the inner periphery, and a wheel mounting flange for mounting a wheel on one end.
  • a hub ring formed on the outer periphery and formed with an inner rolling surface opposed to one of the outer rolling surfaces of the double row, and a small-diameter step portion extending in an axial direction from the inner rolling surface, and the hub ring
  • An inner member comprising an inner ring that is press-fitted into a small-diameter step portion and has an inner ring surface that is opposed to the other of the outer rows of the double row on the outer periphery, and both the inner member and the outer member.
  • the inner ring is a hub ring by a crimping portion formed by plastically deforming the end of the small diameter step portion radially outward.
  • Wheel bearing device fixed in the axial direction with respect to the double row of rolling element rows
  • the pitch circle diameter of the rolling element row on the outer side is set to be larger than the pitch circle diameter of the rolling element row on the inner side
  • the rolling element row on the outer side is constituted by a pole
  • the moving body row is composed of tapered rollers, and the number of the poles is set larger than the number of the tapered rollers.
  • FIG. 1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention.
  • This wheel bearing device is for a driven wheel called a second generation, and includes a hub wheel 1, A wheel bearing 2 fixed to the hub wheel 1 is provided.
  • the hub wheel 1 integrally has a wheel mounting flange 3 for mounting a wheel (not shown) at one end on the outer side, and has a small diameter extending in the axial direction from the wheel mounting flange 3 via a shoulder 1a.
  • a step 1b is formed.
  • Hub ports 3 a are planted on the wheel mounting flange 3 at equal intervals in the circumferential direction.
  • the wheel bearing 2 is press-fitted into the small-diameter step portion 1b through a predetermined shimiro while being in contact with the shoulder portion 1a of the hub wheel 1, and the end portion of the small-diameter step portion 1b is It is fixed in the axial direction by a caulking portion 1 c formed by plastic deformation.
  • the hub ring 1 is formed of medium and high carbon steel containing carbon 0.40 to 0.8 O wt% such as S 53 C, and is hardened by induction hardening from the shoulder 1a to the small diameter step 1b. Has been cured to a range of 5 8 to 6 4 HRC. Note that the caulking portion 1c remains the surface hardness after forging.
  • the wheel bearing 2 is integrally provided with a vehicle body mounting flange 4c to be attached to a knuckle (not shown) constituting a suspension device on the outer periphery, and a double row outer rolling surface 4 on the inner periphery.
  • Two outer rings with outer members 4 with a and 4 b and inner rolling surfaces 5 a and 6 a facing the outer circumferential surfaces 4 a and 4 b of the double row on the outer circumference. 5, 6 and a plurality of rolling surfaces 4 a, 5 a and 4 b, 6 a are provided with a plurality of poles 9 and tapered rollers 10 accommodated in a freely rolling manner via cages 7 and 8 .
  • Seals 1 1 and 1 2 are installed in the opening of the annular space formed between the outer member 4 and the two inner rings 5 and 6, and the grease sealed inside the bearing leaks to the outside. This prevents rainwater and dust from entering the bearing from the outside.
  • Each rolling surface 4a, 5a on the outer side is formed in an arc shape that contacts the pole 9 in an annulus
  • each rolling surface 4b, 6a on the inner side is a tapered roller 1 0 It is formed in a taper shape that makes line contact.
  • the inner ring 6 on the inner side 6 has a large flange 6 b for guiding the tapered roller 10 to the large diameter side of the inner rolling surface 6 a and a small diameter for preventing the tapered roller 10 from dropping off on the small diameter side. ⁇ 6 c is formed.
  • the outer member 4 is formed of medium and high carbon steel containing carbon 0.40 to 0.80 wt% such as S 53 C, and the double row outer rolling surfaces 4 a and 4 b are induction-hardened.
  • the surface hardness is hardened in the range of 58 to 64 HRC.
  • Inner rings 5 and 6 and pole 9 and tapered roller 10 are made of high carbon chrome steel such as SU J 2 and hardened in the range of 58 to 64 HRC up to the core part by quenching.
  • the pitch circle diameter PCDo of the 9 rows of outer poles is larger than the pitch circle diameter PCDi of the 10 rows of tapered rollers on the inner side (PCDo> PCDi)
  • the 9 poles on the outer side are arranged closely spaced, and the number of poles is set to be larger than the number of tapered rollers 10 in the 10 row of inner ones.
  • the basic load rating of the inner side bearing row is larger than the basic load rating of the outer side bearing row and is applied to the inner side bearing row. Even if the load is larger than the load applied to the outer bearing row, the service life can be the same or longer. That is, it is possible to provide a wheel bearing device that can realize a design without waste and has improved strength and durability.
  • FIG. 2 is a longitudinal sectional view showing a second embodiment of the wheel bearing device according to the present invention. Note that this embodiment is basically different from the above-described embodiment only in the configuration of the hub wheel, and other parts having the same parts or the same functions are denoted by the same reference numerals for detailed description. Omitted.
  • This wheel bearing device is for a driven wheel called the third generation, and is press-fitted into the outer member 4, the hub wheel 1 3 and the small-diameter step portion 1 3 b of the hub wheel 13. And an inner member 14 composed of an inner ring 6.
  • the hub wheel 1 3 has an outer outer rolling surface 4 a that faces the outer outer rolling surface 4 a on the outer periphery, and a small-diameter step portion 1 3 that extends in the axial direction from the inner rolling surface 1 3 a. b is formed.
  • the inner ring 6 is press-fitted into the small-diameter step portion 13 b through a predetermined shim opening and is fixed in the axial direction by the crimping portion 1 c.
  • Seals 15 and 1 2 are attached to the openings of the annular space formed between the outer member 4 and the hub ring 13 and the inner ring 6, and the grease sealed inside the bearing is exposed to the outside. It prevents leakage and rainwater and dust from entering the bearing.
  • the hub wheel 13 is made of medium and high carbon steel containing carbon 0.40 to 0.80 wt% such as S 53 C, and the inner rolling surface from the seal land portion 3 b in which the seal 15 is in sliding contact.
  • the surface hardness is hardened to a range of 58 to 64 HRC by induction hardening over 1 3 a and small diameter step 1 3 b.
  • the pitch circle diameter PCD o of the outer pole 9 rows is larger than the pitch circle diameter PCD i of the 10 inner tapered rollers 10D, as in the above-described embodiment.
  • PCD o> PCD i the number of poles in the 9 outer rows of poles is set to be larger than the number of tapered rollers 10 in the 10 rows of inner ones.
  • FIG. 3 is a longitudinal sectional view showing a third embodiment of the wheel bearing device according to the present invention. Note that this embodiment is basically the same as the first embodiment (FIG. 1) described above except that the configuration of the wheel bearing is different, and other parts are the same or the same. Parts having functions ⁇ Parts are denoted by the same reference numerals, and detailed description thereof is omitted.
  • This wheel bearing device is for a driven wheel called the second generation, and includes a hub wheel 1 and a wheel bearing 16 fixed to the hub wheel 1.
  • the wheel bearing 16 is press-fitted into the small-diameter step portion 1b through a predetermined shim opening while being abutted against the shoulder portion 1a of the hub wheel 1, and the end of the small-diameter step portion 1b is plastically deformed. It is fixed in the axial direction by a caulking portion 1 c formed in this manner.
  • the wheel bearing 16 has an outer member 17 integrally formed with a vehicle body mounting flange 4c on the outer periphery and formed with a plurality of outer rolling surfaces 17a and 17b on the inner periphery.
  • Two inner rings 1 8, 1 9 formed on the outer circumference with inner rolling surfaces 1 8 a, 1 9 a facing the double row outer rolling surfaces 17 a, 17 b, respectively,
  • a plurality of tapered rollers 10 and poles 9 are provided between the rolling surfaces 17 a, 18 a and 17 b, 19 a so as to be freely rollable via cages 20, 21.
  • the rolling surfaces 17a and 18a on the outer side are formed in a taper shape, and the rolling surfaces 17b and 19a on the inner side are formed in an arc shape. ing. Then, the large roller 1 8 b for setting the tapered roller 10 on the large-diameter side of the inner raceway 18 a in the inner ring 18 on the one side of the outer ring and the tapered roller 10 on the small-diameter side are dropped off. A small claw 1 8 c is formed for prevention.
  • the outer member 1 7 is formed of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S 53 C, and the double row outer rolling surfaces 1 7 a and 17 b are high frequency. Hardened by quenching to a surface hardness of 58-64 H RC. Inner rings 18 and 19 are made of high carbon chrome steel such as SU J 2 and hardened to the core by a quenching process in the range of 58 to 64 HRC.
  • the outer side tapered roller 10 row pitch circle diameter PC D o is the inner one side pole 9 row pitch circle diameter PCD i larger than the diameter (PC Do> PCD i) and the number of poles in the 9 rows of inner ones is set to be larger than the number of rollers in the 10 rows of outer tapered rollers.
  • the outer diameter D on the inner side of the outer member 17 can be set to a small diameter, and the knuckle can be kneaded without reducing the basic load rating of the inner side bearing row. The size can be reduced and the device can be made lighter and more compact.
  • the outer diameter of the inner ring 18 on the outer side is increased in response to the amount of expansion of the pitch circle diameter PCD o in the outer row of tapered rollers 10 row, so that the difference between the pitch circle diameters PCD o and PCD i Even if there is, the small-diameter step portion 1b of the hub wheel 1 can be formed into a straight shaft, and the workability can be improved.
  • FIG. 4 is a longitudinal sectional view showing a fourth embodiment of the wheel bearing device according to the present invention.
  • This embodiment is basically the same as the third embodiment described above (Fig. 3) except that the configuration of the wheel is different, and the other parts are the same or have the same function. Reference numerals are assigned and detailed description is omitted.
  • This wheel bearing device is for a driven wheel called a third generation, and is an outer member.
  • the hub wheel 2 2 has an outer tapered inner rolling surface 2 2 a facing the outer outer rolling surface 17 a of the outer member 17 on the outer periphery, and the inner rolling surface 2 2 a.
  • a small-diameter step portion 2 2 b extending in the axial direction is formed.
  • a large collar 18 b for guiding the tapered roller 10 is formed on the large diameter side of the inner rolling surface 22 a on the one side of the outer.
  • the inner ring 19 is press-fitted into the small-diameter step portion 2 2 b through a predetermined shim opening and is fixed in the axial direction by the crimping portion 1 c.
  • the hub wheel 2 2 is formed of medium and high carbon steel containing carbon 0.40 to 0.80 wt% such as S 53 C, and rolls inward from the seal land portion 3 b where the seal 15 is in sliding contact.
  • the surface 22 2 a and the small diameter step 2 2 b are hardened by induction hardening in the range of 58 to 64 HRC.
  • the pitch circle diameter PCD o of the outer tapered roller 10 row is larger than the pitch circle diameter PCD i of the pole 9 row on the inner side.
  • the number of poles in the 9 rows of inner side poles is set to be greater than the number of rollers in the 10 rows of outer tapered rollers.
  • the outer diameter D on the inner side of the outer member 17 can be reduced.
  • the knuckle size can be reduced without reducing the basic load rating of the inner bearing row. Therefore, while making the device lighter and more compact, the overall bearing rigidity can be increased and the torque can be reduced.
  • the basic load rating is larger than the basic load rating of the outer bearing row. Even if the load applied to the bearing row is larger than the load applied to the outer bearing portion, the service life can be the same or longer.
  • FIG. 5 is a longitudinal sectional view showing a fifth embodiment of the wheel bearing device according to the invention.
  • This embodiment is basically the same as the first embodiment described above (FIG. 1) except that the left and right rows have the same pitch circle diameter, and has the same components and the same functions as the previously described embodiments. Parts ⁇ Parts are denoted by the same reference numerals, and detailed description is omitted.
  • This wheel bearing device is for a driven wheel called the second generation, and includes a hub wheel 1 and a wheel bearing 24 fixed to the hub wheel 1.
  • the wheel bearing 24 has an outer member 25 having a body mounting flange 4c integrally formed on the outer periphery and double row outer rolling surfaces 4a, 25a formed on the inner periphery, and these on the outer periphery.
  • Two inner races 5, 2 6 formed with inner rolling surfaces 5a, 2 6a opposite to double row outer rolling surfaces 4a, 2 5a, and both rolling surfaces 4a, 5a and
  • a plurality of poles 9 and tapered rollers 10 are provided between 2 5 a and 2 6 a so as to be freely rollable via cages 7 and 2 7.
  • Seals 1 1 and 2 8 are installed in the opening of the annular space formed between the outer member 2 5 and the two inner rings 5 and 2 6, and the grease sealed inside the bearing is exposed to the outside. This prevents leakage and prevents rainwater and dust from entering the bearing.
  • the outer rolling surface 4a, 5a is formed in an arc shape that contacts the pole 9 in an annulus
  • the inner rolling surface 25a, 26a is a tapered roller 1 0 It is formed in a taper shape that makes line contact.
  • the inner ring 26 on the inner side 26 is provided with a large flange 6 b for guiding the tapered roller 10 to the large diameter side of the inner rolling surface 26 a, and the tapered roller 10 is prevented from falling off on the small diameter side.
  • Gavel for 6c Each is formed.
  • the outer member 25 is formed of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S 53 C, and the double-row outer rolling surfaces 4 a and 25 a are represented by induction hardening. Hardened to a surface hardness of 58 to 64 H RC.
  • the inner ring 26 is made of high carbon chrome steel such as SU J 2 and is hardened in the range of 58 to 64 H RC up to the core part by quenching.
  • 9 rows of poles on the outer side are arranged at close intervals, and the number of poles is set to be larger than the number of rollers in the 10 rows of tapered rollers on the inner side. Therefore, the overall bearing rigidity can be secured, and the basic load rating of the inner bearing row is larger than the basic load rating of the outer side bearing row, so that the load applied to the inner side bearing row is the outer bearing. Even if it is larger than the load applied to the row, the service life can be the same or longer. That is, it is possible to provide a wheel bearing device that can realize a design without waste and has improved strength and durability.
  • FIG. 6 is a longitudinal sectional view showing a sixth embodiment of the wheel bearing device according to the present invention.
  • This embodiment basically differs from the above-described fifth embodiment (FIG. 5) only in the configuration of the hub wheel, and other parts having the same parts and the same functions as the above-described embodiments. Parts are denoted by the same reference numerals and detailed description thereof is omitted.
  • This wheel bearing device is for a driven wheel called the third generation, and is press-fitted into the outer member 25, the hub wheel 1 3 and the small diameter step portion 1 3 b of the hub wheel 13. And an inner member 29 composed of an inner ring 26.
  • the pitch circle diameter PCDo of the 9 rows of outer poles and the pitch circle diameter PCDi of the 10 rows of tapered rollers 10 on the inner side are the same as in the embodiment described above.
  • PCDo PCD i) and the outer side —
  • the number of poles in the 9th row is set to be greater than the number of tapered rollers on the 10th row of the inner one. Therefore, while making the device lighter and more compact, the overall bearing rigidity is increased, and the basic load rating is larger than the basic load rating of the outer bearing row, which is applied to the inner bearing row portion. Even if the load becomes larger than the load applied to the outer bearing section, the life can be made the same or more.
  • FIG. 7 is a longitudinal sectional view showing a seventh embodiment of the wheel bearing device according to the present invention.
  • This embodiment is basically the same as the above-described third embodiment (FIG. 3) except that both the left and right rows have the same pitch circle diameter, and has the same parts and the same functions as the above-described embodiments.
  • Parts ⁇ Parts are denoted by the same reference numerals, and detailed description is omitted.
  • This wheel bearing device is for a driven wheel called the second generation, and includes a hub wheel 1 and a wheel bearing 30 fixed to the hub wheel 1.
  • the wheel bearing 30 is press-fitted into the small-diameter step portion 1b through a predetermined shim opening while being abutted against the shoulder portion 1a of the hub wheel 1, and the end of the small-diameter step portion 1b is plastically deformed. It is fixed in the axial direction by a caulking portion 1 c formed in this manner.
  • the wheel bearing 30 has an outer member 3 1 integrally formed with a vehicle body mounting flange 4c on the outer periphery, and formed with a plurality of outer rolling surfaces 17a, 31a on the inner periphery.
  • Two inner rings 1 8 and 3 2 formed on the outer periphery with inner rolling surfaces 1 8 a and 3 2 a facing the double row outer rolling surfaces 1 7 a and 3 1 a, respectively,
  • a plurality of tapered rollers 10 and poles 9 which are rotatably accommodated through cages 20, 3 3 between both rolling surfaces 1 7 a, 1 8 a and 3 1 a, 3 2 a Yes.
  • Each rolling surface 17a, 18a on the outer side is formed in a taper shape, and each rolling surface 3 1a, 3 2a on the inner side is formed in an arc shape. ing. Then, the large roller 1 8 b for setting the tapered roller 10 on the large-diameter side of the inner raceway 18 a in the inner ring 18 on the one side of the outer ring and the tapered roller 10 on the small-diameter side are dropped off. A small claw 1 8 c is formed for prevention.
  • the outer member 3 1 is formed of medium-high carbon steel containing carbon 0.40-0.80 wt% such as S 5 3 C, and double row outer rolling surfaces 1 7 a, 3 1 a is hardened by induction hardening to a surface hardness in the range of 58 to 64 HRC.
  • the inner ring 3 2 is made of high carbon chrome steel such as SUJ 2 and hardened in the range of 58 to 64 HRC up to the core part by quenching.
  • the number of poles in the nine rows of inner side poles is set to be greater than the number of tapered rollers in the outer row of 10 rows.
  • FIG. 8 is a longitudinal sectional view showing an eighth embodiment of the wheel bearing device according to the invention.
  • This embodiment basically differs from the above-described seventh embodiment (FIG. 7) only in the configuration of the hub wheel, and other parts having the same parts and the same functions as the above-described embodiments. Parts are denoted by the same reference numerals and detailed description thereof is omitted.
  • This wheel bearing device is for a driven wheel called the third generation, and is press-fitted into the outer member 3 1, the hub wheel 2 2, and the small-diameter step portion 2 2 b of the hub wheel 2 2. And an inner member 3 4 composed of the inner ring 3 2.
  • PCD o PCD i
  • FIG. 9 is a longitudinal sectional view showing a ninth embodiment of the wheel bearing device according to the invention.
  • This embodiment is basically the same as the above-described fifth embodiment (FIG. 5) except that the pitch circle diameters of both bearing rows are the same.
  • Parts ⁇ Parts are denoted by the same reference numerals, and detailed description is omitted.
  • This wheel bearing device is for a driven wheel called a second generation, and includes a hub wheel 1 and a wheel bearing 35 fixed to the hub wheel 1.
  • the wheel bearing 35 has an outer member 3 6 having a body mounting flange 4 c integrally formed on the outer periphery and double row outer rolling surfaces 4 a, 3 6 a formed on the inner periphery, and these on the outer periphery.
  • a plurality of poles 9 and tapered rollers 10 that are rotatably accommodated via cages 7 and 3 8 are provided between 3 6 a and 3 7 a.
  • Seals 1 1 and 3 9 are installed in the opening of the annular space formed between the outer member 3 6 and the inner rings 5 and 7, and leakage of grease sealed inside the bearing This prevents rainwater and dust from entering the bearing.
  • the outer member 3 6 is formed of medium-high carbon steel containing carbon 0.40-0.80 wt% such as S 5 3 C, and double row outer rolling surfaces 4 a, 3 6 a However, it has been hardened by induction hardening to a surface hardness of 58-64 HRC.
  • the inner ring 37 is made of high carbon chrome steel such as SUJ2, and is hardened in the range of 58 to 64 HR C to the core part by quenching.
  • the pitch circle diameter PCD i of the inner one side tapered roller 10 row is larger than the pitch circle diameter PCD o of the ninth row pole 9 row (PCD i> PCD o )
  • the number of poles in the 9 outer rows of poles is set to be greater than the number of tapered rollers in the 10 inner rows.
  • the inner ring 37 has a thicker wall and the rigidity is increased corresponding to the diameter expansion of the pitch circle diameter PCD i in the row of tapered rollers 10 on the inner side, the inner ring The hoop stress generated in 37 can be suppressed, and the durability of the inner ring 37 can be improved.
  • FIG. 10 is a longitudinal sectional view showing a tenth embodiment of the wheel bearing device according to the present invention.
  • This embodiment basically differs from the above-described ninth embodiment (FIG. 9) only in the configuration of the hub wheel, and other parts having the same parts, the same parts, and the same functions as the above-described embodiments.
  • the parts are denoted by the same reference numerals and detailed description is omitted.
  • This wheel bearing device is for a driven wheel called the third generation, and is press-fitted into the outer member 36, the hub wheel 13 and the small-diameter step portion 13b of the hub wheel 13 And an inner member 40 composed of an inner ring 37.
  • the tapered roller on the inner side is the same as the above-described embodiment.
  • Pitch circle diameter PCD i is set to a larger diameter than the 9th pitch circle diameter PCD o of the outer pole (PCD i> PCD o), and the number of poles in the outer pole 9 rows is The number of tapered rollers on the inner side is set more than the number of rollers in the 10th row.
  • This increases the basic load rating of the inner-side bearing row, and makes the service life the same or longer even if the load applied to the inner-side bearing row is greater than the load applied to the outer-side bearing row.
  • the device can be made lighter and more compact.
  • the inner ring 37 on the inner side is thickened, and the oop stress generated in the inner ring 37 due to the caulking process can be suppressed, and the durability of the inner ring 37 can be improved.
  • FIG. 11 is a longitudinal sectional view showing a first embodiment of the wheel bearing device according to the present invention. This embodiment is the same as the ninth embodiment (FIG. 9) described above. In fact, the configuration of the hub wheel and the wheel bearing is only partially different, and other parts that have the same parts or the same functions as the above-described embodiment .
  • This wheel bearing device is for a driven wheel referred to as a second generation, and includes a hub wheel 1 'and a wheel bearing 35' fixed to the hub wheel 1 '.
  • the wheel bearing 35 ' has a body mounting flange 4c integrally formed on the outer periphery, an outer member 36 having double rows of outer rolling surfaces 4a and 36a formed on the inner periphery, and these double rows on the outer periphery.
  • Two inner rings 5 'and 37' formed with inner rolling surfaces 5a and 37a opposite to the outer rolling surfaces 4a and 36a, and both rolling surfaces 4a, 5a and 36a,
  • a plurality of poles 9 and tapered rollers 10 accommodated in a freely rolling manner via cages 7 and 38 are provided between 37a.
  • the outer diameter of the small-diameter step portion 1 b ′ is larger than that of the hub wheel 1 in the ninth embodiment described above.
  • the inner rings 5 'and 37' are made thinner as the small-diameter step portion 1b 'expands.
  • the diameter of the small-diameter step 1 b 'of the hub wheel 1 ′ is increased without increasing the outer diameter of the wheel bearing 35 ′, thereby reducing the weight of the device and making the hub wheel 1 ′ compact.
  • ⁇ Strength can be increased.
  • FIG. 12 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention.
  • This embodiment is basically the same as the above-described 10th embodiment (FIG. 10) except that the configuration of the hub ring and the inner ring is partially different, and the same parts and functions as described above are the same. Parts to have ⁇ Same parts are given the same reference numerals and detailed explanations are omitted.
  • This wheel bearing device is for a driven wheel called the second generation, and includes an outer member 36, a hub wheel 1 3 ', and a small-diameter step portion 1 3 b' of the hub wheel 1 3 '. And an inner member 40 'composed of an inner ring 37' press-fitted into the inner ring.
  • the outer diameter of the small diameter step portion 13 b ′ is formed larger than the hub wheel 13 in the tenth embodiment described above.
  • This small diameter step 1 As the diameter of 3 'increases, the inner ring 37' becomes thinner. As a result, the diameter of the small diameter step portion 1 3 b 'of the hub wheel 1 3' is increased without increasing the outer diameter of the outer member 36, thereby reducing the weight of the device and reducing the size of the hub. Strength of wheel 1 3 ' ⁇ Rigidity can be increased.
  • FIG. 13 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention.
  • This embodiment is basically the same as the above-described seventh embodiment (FIG. 7) except that the pitch circle diameters of both bearing rows are different, and has the same parts and the same functions as the above-described embodiments. Parts ⁇ Parts are denoted by the same reference numerals and detailed description is omitted.
  • This wheel bearing device is for a driven wheel called a second generation, and includes a hub wheel 1 and a wheel bearing 41 fixed to the hub wheel 1.
  • the wheel bearing 41 has a vehicle body mounting flange 4 c integrally formed on the outer periphery, an outer member 42 formed with double row outer rolling surfaces 17 a and 42 a on the inner periphery, and these double rows on the outer periphery.
  • Outer rolling surfaces 1 7 a, 42 a opposite inner rolling surfaces 1 8 a, 43 a formed two inner rings 1 8, 43, and both rolling surfaces 1 7 a, 1 8 a
  • a plurality of tapered rollers 10 and poles 9 which are rotatably accommodated through cages 20 and 44 between 42a and 43a.
  • the outer member 42 is formed of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S 53 C, and the double row outer rolling surfaces 1 7 a and 42 a are obtained by induction hardening. Hardened to a surface hardness of 58-64 H RC.
  • the inner ring 43 is made of high carbon chrome steel such as SU J 2 and is hardened in the range of 58 to 64 H RC up to the core part by quenching.
  • the pitch circle diameter PCD i of the nine poles on the inner side is larger than the pitch circle diameter PCDo of the outer tapered roller 10 rows (PCD i> PCDo).
  • the number of poles in the 9 rows of inner inner poles is set to be greater than the number of rollers in the 10 outer rows of tapered rollers.
  • the overall weight of the bearing is increased while making the device lighter and more compact.
  • increase the basic load rating of the inner-side bearing row so that the service life will be the same or longer even if the load applied to the inner-side bearing row is greater than the load applied to the outer-side bearing row. Can do.
  • the inner ring 4 3 on the inner side 4 3 is thickened to increase the rigidity corresponding to the amount of expansion of the pitch circle diameter PCD i in the 9 rows of poles on the inner side.
  • the hoop stress generated in the inner ring 43 can be suppressed, and the durability of the inner ring 43 can be improved.
  • FIG. 14 is a longitudinal sectional view showing a 14th embodiment of a wheel bearing device according to the present invention. Note that this embodiment is basically different from the above-mentioned first to third embodiments (Fig. 13) except that the configuration of the hub wheel is basically the same. Are denoted by the same reference numerals, and detailed description is omitted.
  • This wheel bearing device is for a driven wheel called the third generation, and is press-fitted into the outer member 4 2, the hub wheel 2 2, and the small-diameter step portion 2 2 b of the hub wheel 2 2. And an inner member 4 5 composed of the inner ring 4 3.
  • the pitch circle diameter PCD i of the nine rows of poles on the inner side is larger than the pitch circle diameter PCD o of the ten rows of tapered rollers on the one side, as in the embodiment described above.
  • the diameter (PCD i> PCD o) is set, and the number of poles in the inner row of 9 rows of poles is set to be larger than the number of rollers in the outer row of tapered rollers of 10 rows.
  • the strength, rigidity, and weight of the device can be increased without compromising the basic load rating of the bearing row on the inner side and without increasing the rotational torque of the bearing. Can do.
  • the inner ring 43 on the inner side is thicker, and the hoop stress generated in the inner ring 43 due to the caulking process can be suppressed to improve the durability.
  • FIG. 15 is a longitudinal sectional view showing a fifteenth embodiment of the wheel bearing device according to the present invention.
  • This embodiment is the same as the above-described first embodiment (FIG. 13). Basically, only the configuration of the hub wheel and wheel bearing is partially different. Other parts that have the same parts or the same function as the above-mentioned embodiment ⁇ Parts are assigned the same reference numerals and detailed description is omitted. To do.
  • This wheel bearing device is for a driven wheel called the second generation, and includes a hub wheel 1 ′ and a wheel bearing 4 1 ′ fixed to the hub wheel 1 ′.
  • the wheel bearing 4 1 ′ has a body mounting flange 4 c integrally formed on the outer periphery, an outer member 42 having double row outer rolling surfaces 17 a and 42 a formed on the inner periphery, and these on the outer periphery.
  • a plurality of poles 9 and tapered rollers 10 which are rotatably accommodated via cages 20 and 44 are provided between a, 18 a and 42 a, 43 a.
  • the outer diameter of the small-diameter step portion 1 b ′ is larger than that of the hub wheel 1 in the first to third embodiments described above. Further, the inner rings 18 ′ and 43 ′ are made thinner with the increase in diameter of the small diameter step 1b ′. As a result, the small diameter step 1 b ′ of the hub wheel 1 ′ is expanded without increasing the outer diameter of the wheel bearing 4 1 ′. The strength of the wheel 1 ' ⁇ The rigidity can be increased.
  • FIG. 16 is a longitudinal sectional view showing a sixteenth embodiment of the wheel bearing device according to the present invention. Note that this embodiment is basically the same as the above-described 14th embodiment (Fig. 14) except that the configuration of the hub ring and the inner ring is partially different. Parts having the same function ⁇ Parts are denoted by the same reference numerals and detailed description thereof is omitted.
  • This wheel bearing device is for a driven wheel called the second generation, and is press-fitted into the outer member 42, the hub wheel 22 ', and the small-diameter step portion 22b' of the hub wheel 22 '. And an inner member 45 'composed of an inner ring 43'.
  • the hub wheel 22 ' is formed such that the outer diameter of the small-diameter step portion 22b' is larger than the hub wheel 22 in the above-described 14th embodiment.
  • This small diameter step 2 As the diameter of 2 b ′ increases, the inner ring 4 3 ′ becomes thinner. As a result, the diameter of the small diameter step 2 2 b ′ of the hub wheel 2 2 ′ is increased without increasing the outer diameter of the outer member 4 2, thereby reducing the weight of the device and making it compact.
  • the strength of the hub wheel 2 2 ′ ⁇ The rigidity can be increased.
  • the wheel bearing device according to the present invention can be applied to a wheel bearing device having a second or third generation structure regardless of whether it is for a driving wheel or a driven wheel.
  • FIG. 1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention.
  • FIG. 2 is a longitudinal sectional view showing a second embodiment of the wheel bearing device according to the present invention.
  • FIG. 3 is a longitudinal sectional view showing a third embodiment of a wheel bearing device according to the present invention.
  • FIG. 4 is a longitudinal sectional view showing a fourth embodiment of a wheel bearing device according to the present invention.
  • FIG. 5 is a longitudinal sectional view showing a fifth embodiment of the wheel bearing device according to the invention.
  • FIG. 6 is a longitudinal sectional view showing a sixth embodiment of the wheel bearing device according to the invention.
  • FIG. 7 is a longitudinal sectional view showing a seventh embodiment of the wheel bearing device according to the invention.
  • FIG. 8 is a longitudinal sectional view showing an eighth embodiment of the wheel bearing device according to the invention.
  • FIG. 9 is a longitudinal sectional view showing a ninth embodiment of the wheel bearing device according to the invention.
  • FIG. 10 is a longitudinal sectional view showing a tenth embodiment of the wheel bearing device according to the present invention.
  • FIG. 11 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention.
  • FIG. 12 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention.
  • FIG. 13 is a longitudinal sectional view showing a thirteenth embodiment of a wheel bearing device according to the present invention.
  • FIG. 14 is a longitudinal sectional view showing a 14th embodiment of a wheel bearing device according to the present invention.
  • FIG. 15 is a longitudinal sectional view showing a fifteenth embodiment of a wheel bearing device according to the present invention.
  • FIG. 16 is a longitudinal sectional view showing a sixteenth embodiment of a wheel bearing device according to the present invention.
  • FIG. 17 is a longitudinal sectional view showing a conventional wheel bearing device.
  • FIG. 18 is a longitudinal sectional view showing another conventional wheel bearing device.

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

Abstract

[PROBLEMS] A bearing device for a wheel, where contradictory problems of reduction in weight and size and increase in rigidity are solved at the same time an which has improved strength and durability. [MEANS FOR SOLVING PROBLEMS] The bearing device for a wheel is of a third generation structure and has double-row rolling bodies and also has an inner ring (6) fixed by staking an end of a small diameter step section (13b) of a hub ring (13) by rocking die swaging operation. Of the double-row rolling bodies, the rolling body row on the outer side has a pitch circle diameter PCDo greater than the pitch circle diameter PCDi of the rolling body row on the inner side. The rolling body row on the outer side is constructed from balls (9), the rolling body row on the inner side is constructed from tapered rollers (10), and the number of the balls (9) is more than that of the tapered rollers (10). This increases bearing rigidity, realizes low running torque, and, even if a load applied to the bearing row on the inner side is higher than that to the bearing row on the outer side, keeps the service life of the bearing device unchanged or even extends it.

Description

明 細 書  Specification
車輪用軸受装置  Wheel bearing device
技術分野  Technical field
[0001 ] 本発明は、 自動車等の車輪を回転自在に支承する車輪用軸受装置、 特に、 軽量化と高剛性化を図った車輪用軸受装置に関するものである。  TECHNICAL FIELD [0001] The present invention relates to a wheel bearing device that rotatably supports a wheel of an automobile or the like, and more particularly to a wheel bearing device that is reduced in weight and increased in rigidity.
背景技術  Background art
[0002] 従来から自動車等の車輪を支持する車輪用軸受装置は、 車輪を取り付ける ためのハブ輪を転がり軸受を介して回転自在に支承するもので、 駆動輪用と 従動輪用とがある。 構造上の理由から、 駆動輪用では内輪回転方式が、 従動 輪用では内輪回転と外輪回転の両方式が一般的に採用されている。 この車輪 用軸受装置には、 所望の軸受剛性を有し、 ミスァライメントに対しても耐久 性を発揮すると共に、 燃費向上の観点から回転トルクが小さい複列アンギュ ラ玉軸受が多用されている。 一方、 オフロード力一やトラック等、 車体重量 が嵩む車両には複列円錐ころ軸受が使用されている。  [0002] Conventionally, wheel bearing devices for supporting wheels of automobiles and the like support a hub wheel for mounting a wheel rotatably via a rolling bearing, and there are a drive wheel and a driven wheel. For structural reasons, the inner ring rotation method is generally used for driving wheels, and both the inner ring rotation method and outer ring rotation method are used for driven wheels. In this wheel bearing device, a double-row angular contact ball bearing that has a desired bearing rigidity, exhibits durability against misalignment, and has a low rotational torque from the viewpoint of improving fuel efficiency is often used. . On the other hand, double row tapered roller bearings are used in vehicles with heavy vehicle body weight such as off-road force and trucks.
[0003] また、 車輪用軸受装置には、 懸架装置を構成するナックルとハブ輪との間 に複列アンギユラ玉軸受等からなる車輪用軸受を嵌合させた第 1世代と称さ れる構造から、 外方部材の外周に直接車体取付フランジまたは車輪取付フラ ンジが形成された第 2世代構造、 また、 ハブ輪の外周に一方の内側転走面が 直接形成された第 3世代構造、 あるいは、 ハブ輪と等速自在継手の外側継手 部材の外周にそれぞれ内側転走面が直接形成された第 4世代構造とに大別さ れている。  [0003] In addition, the wheel bearing device has a structure called a first generation in which a wheel bearing composed of a double-row anguilla ball bearing or the like is fitted between a knuckle and a hub wheel constituting a suspension device. Second generation structure with body mounting flange or wheel mounting flange formed directly on the outer periphery of the outer member, or third generation structure with one inner raceway formed directly on the outer periphery of the hub wheel, or hub It is roughly divided into the 4th generation structure in which the inner rolling surface is directly formed on the outer circumference of the outer joint member of the wheel and constant velocity universal joint.
[0004] 図 1 7に示す車輪用軸受装置は、 軽量■ コンパク ト化を図った第 4世代構 造で、 ハブ輪 5 0と複列の転がり軸受 5 1および等速自在継手 5 2とがュニ ット化して構成されている。 複列の転がり軸受 5 1は、 外方部材 5 3と内方 部材 5 4と、 両部材間に収容された複数のポール 5 5および円錐ころ 5 6と を備えている。 なお、 以下の説明では、 車両に組み付けた状態で車両の外側 寄りとなる側をアウター側 (図面左側) 、 中央寄り側をインナー側 (図面右 側) という。 [0004] The wheel bearing device shown in Fig. 17 has a lightweight fourth-generation structure that is compact and has a hub wheel 50, a double row rolling bearing 51, and a constant velocity universal joint 52. It is configured as a unit. The double row rolling bearing 51 includes an outer member 53, an inner member 54, and a plurality of poles 55 and tapered rollers 56 accommodated between the two members. In the following description, the side closer to the outside of the vehicle in the state assembled to the vehicle is the outer side (left side of the drawing), and the side closer to the center is the inner side (right side of the drawing). Side).
[0005] 外方部材 5 3は、 外周に図示しない懸架装置を構成するナックルに取り付 けられる車体取付フランジ 5 3 cを一体に有し、 内周に複列の外側転走面 5 3 a、 5 3 bが形成されている。 ここで、 アウター側の外側転走面 5 3 aの 直径は、 ィンナー側の外側転走面 5 3 bの直径よりも小径に設定されている 。 一方、 内方部材 5 4は、 ハブ輪 5 0と、 このハブ輪 5 0と一体に構成され た後述する外側継手部材 5 8と、 この外側継手部材 5 8に圧入された別体の 内輪 5 7とを有している。  [0005] The outer member 53 is integrally provided with a vehicle body mounting flange 53c attached to a knuckle constituting a suspension device (not shown) on the outer periphery, and a double row outer rolling surface 53a on the inner periphery. 5 3 b is formed. Here, the diameter of the outer rolling surface 53a on the outer side is set to be smaller than the diameter of the outer rolling surface 53b on the inner side. On the other hand, the inner member 5 4 includes a hub wheel 50, an outer joint member 5 8, which will be described later, integrally formed with the hub wheel 50, and a separate inner ring 5 press-fitted into the outer joint member 5 8. 7 and.
[0006] ハブ輪 5 0は、 一端部に車輪 (図示せず) を取り付けるための車輪取付フ ランジ 5 0 bを一体に有し、 外周に複列の外側転走面 5 3 a、 5 3 bのうち アウター側の外側転走面 5 3 aに対向する内側転走面 5 0 aが直接形成され ると共に、 内輪 5 7の外周には複列の外側転走面 5 3 a、 5 3 bのうちイン ナ一側の外側転走面 5 3 bに対向する内側転走面 5 7 aが形成されている。  [0006] The hub wheel 50 has integrally a wheel mounting flange 50b for mounting a wheel (not shown) at one end, and double row outer rolling surfaces 5 3a, 5 3 on the outer periphery. Out of b, the inner side rolling surface 50 0a opposite to the outer side outer rolling surface 5 3 a is directly formed, and the outer race of the inner ring 5 7 has double row outer rolling surfaces 5 3 a, 5 3 An inner rolling surface 5 7 a opposite to the outer rolling surface 5 3 b on the inner side of b is formed.
[0007] 等速自在継手 5 2は、 カップ状のマウス部 5 9と、 このマウス部 5 9の底 部をなす肩部 6 0とからなる外側継手部材 5 8を有し、 この外側継手部材 5 8の内周には曲線状のトラック溝 5 8 aが形成されている。 内輪 5 7はマウ ス部 5 9の外径に圧入され、 止め輪 6 1によって軸方向に固定されている。  [0007] The constant velocity universal joint 52 has an outer joint member 58 comprising a cup-shaped mouth portion 59 and a shoulder portion 60 forming the bottom of the mouth portion 59. The outer joint member A curved track groove 5 8 a is formed on the inner periphery of 58. The inner ring 5 7 is press-fitted into the outer diameter of the mouse part 59 and is fixed in the axial direction by a retaining ring 61.
[0008] 外方部材 5 3と内方部材 5 4のアウター側の転走面 5 3 a、 5 0 a間には 複数のポール 5 5が、 インナ一側の転走面 5 3 b、 5 7 a間には複数の円錐 ころ 5 6がそれぞれ転動自在に収容され、 これらポール 5 5列および円錐こ ろ 5 6列のうちァウタ一側のポール 5 5列のピッチ円直径は、 ィンナ一側の 円錐ころ 5 6列のピッチ円直径よりも小さく設定されている。 これにより、 アウター側の軸受列部分に比べ大きな荷重が加わるインナ一側の軸受列部分 の基本定格荷重を、 アウター側の軸受列部分の基本定格荷重よりも大きくし て、 これら両軸受列部分の寿命をほぼ同じにすることができ、 無駄のない設 計を可能にすることができる (例えば、 特許文献 1参照。 ) 。  [0008] Between the outer member 5 3 and the inner member 5 4 on the outer rolling surface 5 3 a, 5 0 a, a plurality of poles 5 5 are arranged on the inner one rolling surface 5 3 b, 5 7 A plurality of tapered rollers 5 6 are accommodated in a freely movable manner between the poles 5a and 5c. The tapered rollers on the side are set smaller than the pitch circle diameter of 6 rows. As a result, the basic rated load of the inner side bearing row where a larger load is applied than the outer side bearing row is made larger than the basic rated load of the outer side bearing row, and The lifespan can be made substantially the same, and a design without waste can be made possible (see, for example, Patent Document 1).
[0009] ところが、 このような車輪用軸受装置にあっては、 外側継手部材 5 8のマ ウス部 5 9に内輪 5 7が固定される構造のため、 軸方向には確かにコンパク ト化されるが、 外方部材 5 3の外径自体が大きくなり、 軽量化を阻害するだ けでなく、 ナックルをはじめとする周辺部品の設計変更を伴い好ましくない 。 こうした問題を解決したものとして、 図 1 8に示すような車輪用軸受装置 が知られている。 However, such a wheel bearing device has a structure in which the inner ring 5 7 is fixed to the mouse part 59 of the outer joint member 58, so that it is certainly compact in the axial direction. However, the outer diameter itself of the outer member 53 is increased, which not only hinders weight reduction, but is also undesirable due to a design change of peripheral parts such as a knuckle. A wheel bearing device as shown in Fig. 18 is known as a solution to these problems.
[0010] この車輪用軸受装置は、 外周にナックル (図示せず) に取り付けられるた めの車体取付フランジ 6 2 cを一体に有し、 内周に複列の外側転走面 6 2 a 、 6 2 bが形成された外方部材 6 2と、 一端部に車輪 (図示せず) を取り付 けるための車輪取付フランジ 6 3を一体に有し、 外周に複列の外側転走面 6 2 a、 6 2 bのうちァウタ一側の外側転走面 6 2 aに対向する内側転走面 6 4 aと、 この内側転走面 6 4 aから軸方向に延びる小径段部 6 4 bが形成さ れたハブ輪 6 4、 およびこのハブ輪 6 4の小径段部 6 4 bに外嵌され、 複列 の外側転走面 6 2 a、 6 2 bのうちインナ一側の外側転走面 6 2 bに対向す る内側転走面 6 5 aが形成された内輪 6 5からなる内方部材 6 6と、 これら 両転走面間に収容された複列のポール 6 7、 6 8と、 これら複列のポール 6 7、 6 8を転動自在に保持する保持器 6 9、 7 0とを備えた複列アンギユラ 玉軸受で構成されている。  [0010] This wheel bearing device has a vehicle body mounting flange 6 2 c integrally attached to a knuckle (not shown) on the outer periphery, and a double row outer rolling surface 6 2 a on the inner periphery. 6 2 b The outer member 6 2 is formed on one end and the wheel mounting flange 6 3 for attaching the wheel (not shown) at one end is integrated into the outer periphery. 2 a, 6 2 b Outer rolling surface on one side of outer side 6 2 a Inner rolling surface 6 4 a opposite to the outer rolling surface 6 4 a and small diameter step portion 6 4 b extending axially from this inner rolling surface 6 4 a Is formed on the hub wheel 6 4 formed with the outer ring 6 and the small-diameter step portion 6 4 b of the hub wheel 6 4. An inner member 6 6 composed of an inner ring 6 5 formed with an inner rolling surface 6 5 a facing the running surface 6 2 b, and double-row poles 6 7, 6 accommodated between these rolling surfaces 8 and these double-row poles 6 7 and 6 8 It is composed of double-row anguillar ball bearings with cages 69, 70 that can be moved freely.
[001 1 ] 内輪 6 5は、 ハブ輪 6 4の小径段部 6 4 bを径方向外方に塑性変形させて 形成した加締部 6 4 cによって軸方向に固定されている。 そして、 外方部材 6 2と内方部材 6 6との間に形成される環状空間の開口部にシール 7 1、 7 2が装着され、 軸受内部に封入された潤滑グリースの漏洩と、 外部から軸受 内部に雨水やダスト等が侵入するのを防止している。  [001 1] The inner ring 65 is fixed in the axial direction by a caulking portion 6 4 c formed by plastic deformation of the small-diameter stepped portion 6 4 b of the hub wheel 6 4 radially outward. The seals 7 1 and 7 2 are attached to the opening of the annular space formed between the outer member 62 and the inner member 66, and leakage of the lubricating grease sealed inside the bearing Prevents rainwater and dust from entering the bearing.
[0012] ここで、 ァウタ一側のポール 6 7列のピッチ円直径 D 1が、 ィンナ一側の ポール 6 8列のピッチ円直径 D 2よりも大径に設定されている。 これに伴い 、 ハブ輪 6 4の内側転走面 6 4 aが内輪 6 5の内側転走面 6 5 aよりも拡径 され、 あわせて外方部材 6 2のァウタ一側の外側転走面 6 2 aがィンナー側 の外側転走面 6 2 bよりも拡径されている。 そして、 アウター側のポール 6 7がインナ一側のポール 6 8よりも多数収容されている。 このように、 各ピ ツチ円直径 D 1、 D 2を D 1 > D 2に設定することにより、 車両の静止時だ けでなく旋回時においても剛性が向上し、 車輪用軸受装置の長寿命化を図る ことができる (例えば、 特許文献 2参照。 ) 。 [0012] Here, the pitch circle diameter D1 of the pole 67 on the one side of the counter is set to be larger than the pitch circle diameter D2 of the pole 68 on the side of the inner side. Accordingly, the inner raceway surface 6 4 a of the hub wheel 6 4 has a larger diameter than the inner raceway surface 65 5 a of the inner race 65, and the outer raceway surface on the outer side of the outer member 62 is also adjusted 6 2 a has a larger diameter than the outer rolling surface 6 2 b on the inner side. The outer side pole 6 7 is accommodated more than the inner side pole 6 8. In this way, by setting each pitch circle diameter D 1 and D 2 to D 1> D 2, the vehicle is stationary. In addition to improving the rigidity even during turning, it is possible to extend the life of the wheel bearing device (for example, see Patent Document 2).
特許文献 1 :特開平 1 1—9 1 3 0 8号公報  Patent Document 1: Japanese Patent Laid-Open No. 1-9-9 30 8
特許文献 2:特開 2 0 0 4 _ 1 0 8 4 4 9号公報  Patent Document 2: Japanese Patent Laid-Open No. 2 0 0 4 _ 1 0 8 4 4 9
発明の開示  Disclosure of the invention
発明が解決しょうとする課題  Problems to be solved by the invention
[0013] こうした従来の車輪用軸受装置では、 アウター側のポール 6 7列のピッチ 円直径 D 1がィンナ一側のポール 6 8列のピッチ円直径 D 2よりも大径に設 定され、 これに伴い、 ハブ輪 6 4の内側転走面 6 4 aが内輪 6 5の内側転走 面 6 5 aよりも拡径されている。 これにより装置の大型化を避けつつァウタ 一側の軸受列の剛性が向上し、 車輪用軸受装置の長寿命化を図ることができ る。 然しながら、 インナ _側■アウター側の各軸受列に加わる荷重は互いに 異なり、 アウター側の軸受列に加わる荷重よりも、 インナ一側の軸受列に加 わる荷重の方が大きくなるのが一般的である。 こうした場合、 この従来の車 輪用軸受装置では、 インナ一側の軸受列の基本定格荷重が、 アウター側の軸 受列の基本定格荷重よりも小さくなって短寿命になる。  [0013] In such a conventional wheel bearing device, the pitch circle diameter D1 of the outer-side pole 6 7 rows is set larger than the pitch circle diameter D2 of the inner-side pole 68 rows, Accordingly, the inner raceway surface 6 4 a of the hub wheel 6 4 has a larger diameter than the inner raceway surface 6 5 a of the inner race 65. As a result, the rigidity of the bearing row on the one side of the tower can be improved while avoiding an increase in the size of the device, and the service life of the wheel bearing device can be extended. However, the load applied to each bearing row on the inner _ side and the outer side is different from each other, and the load applied to the bearing row on the inner side is generally larger than the load applied to the bearing row on the outer side. is there. In such a case, in this conventional wheel bearing device, the basic load rating of the inner side bearing row becomes smaller than the basic load rating of the outer side bearing row, resulting in a short life.
[0014] 本発明は、 このような事情に鑑みてなされたもので、 装置の軽量■ コンパ ク ト化と高剛性化という相反する課題を同時に解決すると共に、 強度 "耐久 性を向上させた車輪用軸受装置を提供することを目的としている。  [0014] The present invention has been made in view of such circumstances, and simultaneously solves the conflicting problems of light weight and compactness and high rigidity of the device, and at the same time, has improved strength and durability. An object of the present invention is to provide a bearing device for a vehicle.
課題を解決するための手段  Means for solving the problem
[0015] 係る目的を達成すべく、 本発明は、 外周にナックルに取り付けられるため の車体取付フランジを一体に有し、 内周に複列の外側転走面が形成された外 方部材と、 一端部に車輪を取り付けるための車輪取付フランジを一体に有し 、 外周に小径段部が形成されたハブ輪、 およびこのハブ輪の小径段部に圧入 され、 外周に前記複列の外側転走面に対向する内側転走面が形成された少な くとも一つの内輪からなる内方部材と、 この内方部材と前記外方部材の両転 走面間に転動自在に収容された複列の転動体列とを備えた車輪用軸受装置に おいて、 前記複列の転動体列のうち一方の転動体列がポールで構成され、 他 方の転動体列が円錐ころで構成されると共に、 前記ポール列のポール個数が 前記円錐ころ列のころ個数よりも多く設定されている。 ■ ■ ■請求項 1 [001 6] このように、 複列の転動体列を備えた第 2または第 3世代構造の車輪用軸 受装置において、 複列の転動体列のうち一方の転動体列がポールで構成され 、 他方の転動体列が円錐ころで構成されると共に、 ポール列のポール個数が 円錐ころ列のころ個数よりも多く設定されているので、 軸受の回転トルクを 増大させることなく、 装置の軽量■ コンパク ト化と高剛性化という相反する 課題を同時に解決することができる。 [0015] In order to achieve the object, the present invention includes an outer member integrally having a vehicle body mounting flange to be attached to a knuckle on the outer periphery, and a double row outer rolling surface formed on the inner periphery. A hub wheel having a wheel mounting flange for mounting a wheel at one end is integrally formed, a hub wheel having a small-diameter step portion formed on the outer periphery, and press-fitted into the small-diameter step portion of the hub wheel, and the double row outer rolling on the outer periphery. An inner member composed of at least one inner ring formed with an inner rolling surface facing the surface, and a double row accommodated in a freely rolling manner between both rolling surfaces of the inner member and the outer member. In the wheel bearing device provided with the rolling element row, one of the double row rolling element rows is constituted by a pole, and the other. And the number of poles in the pole row is set to be larger than the number of rollers in the tapered roller row. ■ ■ ■ Claim 1 [001 6] Thus, in the wheel bearing device of the second or third generation structure having the double row rolling element row, one of the double row rolling element rows. The row is composed of poles, the other rolling element row is composed of tapered rollers, and the number of poles in the pole row is set larger than the number of rollers in the tapered roller row, so that the rotational torque of the bearing is increased. It is possible to solve the conflicting issues of compactness and high rigidity at the same time.
[001 7] また、 本発明のように、 前記複列の転動体列のうちアウター側の転動体列 のピッチ円直径がィンナー側の転動体列のピッチ円直径よりも大径に設定さ れていても良い。 請求項 2  [001 7] Further, as in the present invention, the pitch circle diameter of the outer rolling element row of the double row rolling element rows is set larger than the pitch circle diameter of the inner rolling element row. May be. Claim 2
[0018] また、 本発明のように、 前記複列の転動体列のうちインナ一側の転動体列 のピッチ円直径がアウター側の転動体列のピッチ円直径よりも大径に設定さ れていても良い。 請求項 3  [0018] Further, as in the present invention, the pitch circle diameter of the inner one rolling element row of the double row rolling element rows is set larger than the pitch circle diameter of the outer rolling element row. May be. Claim 3
[001 9] また、 本発明のように、 前記小径段部の端部を径方向外方に塑性変形させ て形成した加締部により前記内輪が軸方向に固定されていれば、 軽量■ コン パク ト化を図ることができる。 ■ ■ ■請求項 4  [001 9] Further, as in the present invention, if the inner ring is fixed in the axial direction by a caulking portion formed by plastically deforming the end portion of the small diameter step portion radially outward, a lightweight It can be packaged. ■ ■ ■ Claim 4
[0020] また、 本発明のように、 前記ハブ輪の外周にアウター側の内側転走面が直 接形成されると共に、 この内側転走面から軸方向に延びる前記小径段部が形 成され、 この小径段部に所定のシメシ口を介して前記インナ一側の内輪が圧 入されていれば、 一層装置の軽量■ コンパク ト化ができる。 ■ ■ ■請求項 5 [0020] Further, as in the present invention, an outer-side inner rolling surface is formed directly on the outer periphery of the hub wheel, and the small-diameter step portion extending in the axial direction from the inner-rolling surface is formed. If the inner ring on the inner side is press-fitted into the small diameter step portion through a predetermined shim opening, the device can be made lighter and more compact. ■ ■ ■ Claim 5
[0021 ] また、 本発明のように、 前記ハブ輪の小径段部に一対の内輪が圧入され、 これらの内輪の内径が同一に設定されていれば、 ハブ輪の小径段部をストレ 一卜な形状に形成することができ、 加工性を向上させることができる。 ■ ■ ■言青求項 6 [0021] Further, as in the present invention, if a pair of inner rings are press-fitted into the small-diameter step portion of the hub ring and the inner diameters of these inner rings are set to be the same, the small-diameter step portion of the hub ring is connected to the Can be formed in any shape, and processability can be improved. ■ ■ ■ Wording requirements 6
発明の効果  The invention's effect
[0022] 本発明に係る車輪用軸受装置は、 外周にナックルに取り付けられるための 車体取付フランジを一体に有し、 内周に複列の外側転走面が形成された外方 部材と、 一端部に車輪を取り付けるための車輪取付フランジを一体に有し、 外周に小径段部が形成されたハブ輪、 およびこのハブ輪の小径段部に圧入さ れ、 外周に前記複列の外側転走面に対向する内側転走面が形成された少なく とも一つの内輪からなる内方部材と、 この内方部材と前記外方部材の両転走 面間に転動自在に収容された複列の転動体列とを備えた車輪用軸受装置にお いて、 前記複列の転動体列のうち一方の転動体列がポールで構成され、 他方 の転動体列が円錐ころで構成されると共に、 前記ポール列のポール個数が前 記円錐ころ列のころ個数よりも多く設定されているので、 装置の軽量■ コン パク ト化と高剛性化という相反する課題を同時に解決することができると共 に、 低トルク化が実現でき、 インナ一側の軸受列に加わる荷重がアウター側 の軸受列に加わる荷重よりも大きくなつても寿命を同じかそれ以上にするこ とができる。 したがって、 無駄のない設計を実現することができ、 強度 -耐 久性を向上させた車輪用軸受装置を提供することができる。 [0022] The wheel bearing device according to the present invention has a vehicle body mounting flange for being attached to the knuckle on the outer periphery, and an outer side in which a double row outer rolling surface is formed on the inner periphery. And a hub wheel having a wheel mounting flange for mounting a wheel at one end, a small-diameter step portion formed on the outer periphery, and a press fit into the small-diameter step portion of the hub wheel, and the double row on the outer periphery. An inner member formed of at least one inner ring formed with an inner rolling surface opposite to the outer rolling surface of the inner ring, and is accommodated in a freely rollable manner between both rolling surfaces of the inner member and the outer member. In the wheel bearing device provided with a double row of rolling element rows, one of the double row rolling element rows is constituted by a pole, and the other rolling element row is constituted by a tapered roller. In addition, since the number of poles in the pole row is set to be larger than the number of rollers in the tapered roller row, the conflicting problems of light weight and compactness and high rigidity of the device can be solved at the same time. In addition, low torque can be achieved and the inner shaft Even summer greater than the load which the load applied to the column is applied to the bearing column of the outer side can be a child life equal to or higher. Therefore, it is possible to provide a wheel bearing device that can realize a design without waste and has improved strength-durability.
発明を実施するための最良の形態 BEST MODE FOR CARRYING OUT THE INVENTION
外周にナックルに取り付けられるための車体取付フランジを一体に有し、 内周に複列の外側転走面が形成された外方部材と、 一端部に車輪を取り付け るための車輪取付フランジを一体に有し、 外周に前記複列の外側転走面の一 方に対向する内側転走面と、 この内側転走面から軸方向に延びる小径段部が 形成されたハブ輪、 およびこのハブ輪の小径段部に圧入され、 外周に前記複 列の外側転走面の他方に対向する内側転走面が形成された内輪からなる内方 部材と、 この内方部材と前記外方部材の両転走面間に転動自在に収容された 複列の転動体列とを備え、 前記小径段部の端部を径方向外方に塑性変形させ て形成した加締部により前記内輪がハブ輪に対して軸方向に固定された車輪 用軸受装置において、 前記複列の転動体列のうちアウター側の転動体列のピ ツチ円直径がィンナー側の転動体列のピッチ円直径よりも大径に設定される と共に、 前記アウター側の転動体列がポールで構成され、 インナ一側の転動 体列が円錐ころで構成され、 前記ポールの個数が前記円錐ころの個数よりも 多く設定されている。 実施例 1 A body mounting flange that can be attached to the knuckle on the outer periphery is integrated, an outer member with a double row outer raceway formed on the inner periphery, and a wheel mounting flange for mounting a wheel on one end. A hub ring formed on the outer periphery and formed with an inner rolling surface opposed to one of the outer rolling surfaces of the double row, and a small-diameter step portion extending in an axial direction from the inner rolling surface, and the hub ring An inner member comprising an inner ring that is press-fitted into a small-diameter step portion and has an inner ring surface that is opposed to the other of the outer rows of the double row on the outer periphery, and both the inner member and the outer member. The inner ring is a hub ring by a crimping portion formed by plastically deforming the end of the small diameter step portion radially outward. Wheel bearing device fixed in the axial direction with respect to the double row of rolling element rows The pitch circle diameter of the rolling element row on the outer side is set to be larger than the pitch circle diameter of the rolling element row on the inner side, the rolling element row on the outer side is constituted by a pole, and The moving body row is composed of tapered rollers, and the number of the poles is set larger than the number of the tapered rollers. Example 1
[0024] 以下、 本発明の実施の形態を図面に基づいて詳細に説明する。  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図 1は、 本発明に係る車輪用軸受装置の第 1の実施形態を示す縦断面図で この車輪用軸受装置は第 2世代と呼称される従動輪用であって、 ハブ輪 1 と、 このハブ輪 1に固定された車輪用軸受 2とを備えている。 ハブ輪 1は、 アウター側の一端部に車輪 (図示せず) を取り付けるための車輪取付フラン ジ 3を一体に有し、 この車輪取付フランジ 3から肩部 1 aを介して軸方向に 延びる小径段部 1 bが形成されている。 車輪取付フランジ 3にはハブポルト 3 aが周方向等配に植設されている。  FIG. 1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention. This wheel bearing device is for a driven wheel called a second generation, and includes a hub wheel 1, A wheel bearing 2 fixed to the hub wheel 1 is provided. The hub wheel 1 integrally has a wheel mounting flange 3 for mounting a wheel (not shown) at one end on the outer side, and has a small diameter extending in the axial direction from the wheel mounting flange 3 via a shoulder 1a. A step 1b is formed. Hub ports 3 a are planted on the wheel mounting flange 3 at equal intervals in the circumferential direction.
[0025] 車輪用軸受 2は、 ハブ輪 1の肩部 1 aに衝合した状態で小径段部 1 bに所 定のシメシロを介して圧入されると共に、 小径段部 1 bの端部を塑性変形さ せて形成した加締部 1 cによって軸方向に固定されている。 ハブ輪 1は S 5 3 C等の炭素 0 . 4 0〜0 . 8 O w t %を含む中高炭素鋼で形成され、 肩部 1 aから小径段部 1 bに亙って高周波焼入れによって表面硬さを 5 8〜6 4 H R Cの範囲に硬化処理されている。 なお、 加締部 1 cは鍛造加工後の表面 硬さのままとされている。 これにより、 車輪取付フランジ 3に負荷される回 転曲げ荷重に対して充分な機械的強度を有し、 車輪用軸受 2の嵌合部となる 小径段部 1 bの耐フレツティング性が向上すると共に、 加締部 1 cの塑性加 ェを微小なクラック等の発生を防止してスムーズに行うことができる。  [0025] The wheel bearing 2 is press-fitted into the small-diameter step portion 1b through a predetermined shimiro while being in contact with the shoulder portion 1a of the hub wheel 1, and the end portion of the small-diameter step portion 1b is It is fixed in the axial direction by a caulking portion 1 c formed by plastic deformation. The hub ring 1 is formed of medium and high carbon steel containing carbon 0.40 to 0.8 O wt% such as S 53 C, and is hardened by induction hardening from the shoulder 1a to the small diameter step 1b. Has been cured to a range of 5 8 to 6 4 HRC. Note that the caulking portion 1c remains the surface hardness after forging. This has sufficient mechanical strength against the rotational bending load applied to the wheel mounting flange 3, and improves the fretting resistance of the small-diameter stepped portion 1b that becomes the fitting portion of the wheel bearing 2. At the same time, the plastic application of the crimped portion 1c can be smoothly performed while preventing the occurrence of minute cracks and the like.
[0026] 車輪用軸受 2は、 外周に懸架装置を構成するナックル (図示せず) に取り 付けられるための車体取付フランジ 4 cを一体に有し、 内周に複列の外側転 走面 4 a、 4 bが形成された外方部材 4と、 外周にこれら複列の外側転走面 4 a、 4 bに対向する内側転走面 5 a、 6 aがそれぞれ形成された 2つの内 輪 5、 6と、 両転走面 4 a、 5 aおよび 4 b、 6 a間に保持器 7、 8を介し て転動自在に収容された複数のポール 9および円錐ころ 1 0を備えている。 外方部材 4と 2つの内輪 5、 6との間に形成された環状空間の開口部にはシ —ル 1 1、 1 2が装着され、 軸受内部に封入されたグリースの外部への漏洩 と、 外部から雨水やダスト等が軸受内部に侵入するのを防止している。 [0026] The wheel bearing 2 is integrally provided with a vehicle body mounting flange 4c to be attached to a knuckle (not shown) constituting a suspension device on the outer periphery, and a double row outer rolling surface 4 on the inner periphery. Two outer rings with outer members 4 with a and 4 b and inner rolling surfaces 5 a and 6 a facing the outer circumferential surfaces 4 a and 4 b of the double row on the outer circumference. 5, 6 and a plurality of rolling surfaces 4 a, 5 a and 4 b, 6 a are provided with a plurality of poles 9 and tapered rollers 10 accommodated in a freely rolling manner via cages 7 and 8 . Seals 1 1 and 1 2 are installed in the opening of the annular space formed between the outer member 4 and the two inner rings 5 and 6, and the grease sealed inside the bearing leaks to the outside. This prevents rainwater and dust from entering the bearing from the outside.
[0027] アウター側の各転走面 4 a、 5 aはポール 9にアンギユラコンタク トする 円弧状に形成されると共に、 インナ一側の各転走面 4 b、 6 aは円錐ころ 1 0にラインコンタク トするテ一パ状に形成されている。 そして、 インナ一側 の内輪 6における内側転走面 6 aの大径側に円錐ころ 1 0を案内するための 大鍔 6 bと、 小径側に円錐ころ 1 0の脱落を防止するための小鍔 6 cがそれ ぞれ形成されている。  [0027] Each rolling surface 4a, 5a on the outer side is formed in an arc shape that contacts the pole 9 in an annulus, and each rolling surface 4b, 6a on the inner side is a tapered roller 1 0 It is formed in a taper shape that makes line contact. The inner ring 6 on the inner side 6 has a large flange 6 b for guiding the tapered roller 10 to the large diameter side of the inner rolling surface 6 a and a small diameter for preventing the tapered roller 10 from dropping off on the small diameter side.鍔 6 c is formed.
[0028] 外方部材 4は S 5 3 C等の炭素 0 . 4 0〜0 . 8 0 w t %を含む中高炭素 鋼で形成され、 複列の外側転走面 4 a、 4 bが高周波焼入れによって表面硬 さを 5 8〜6 4 H R Cの範囲に硬化処理されている。 また、 内輪 5、 6およ びポール 9、 円錐ころ 1 0は S U J 2等の高炭素クロム鋼で形成され、 ズブ 焼入れによって芯部まで 5 8〜6 4 H R Cの範囲に硬化処理されている。  [0028] The outer member 4 is formed of medium and high carbon steel containing carbon 0.40 to 0.80 wt% such as S 53 C, and the double row outer rolling surfaces 4 a and 4 b are induction-hardened. The surface hardness is hardened in the range of 58 to 64 HRC. Inner rings 5 and 6 and pole 9 and tapered roller 10 are made of high carbon chrome steel such as SU J 2 and hardened in the range of 58 to 64 HRC up to the core part by quenching.
[0029] ここで、 本実施形態では、 アウター側のポール 9列のピッチ円直径 P C D oがインナ一側の円錐ころ 1 0列のピッチ円直径 P C D i よりも大径 (P C D o > P C D i ) に設定されると共に、 アウター側のポール 9列が間隔を詰 めて配列され、 そのポール個数が、 インナ一側の円錐ころ 1 0列における円 錐ころ 1 0の個数よりも多くなるように設定されている。 したがって、 全体 の軸受剛性が確保できると共に低トルク化が実現でき、 インナ一側の軸受列 の基本定格荷重がアウター側の軸受列の基本定格荷重よりも大きくなり、 ィ ンナー側の軸受列に加わる荷重がアウター側の軸受列に加わる荷重よりも大 きくなつても寿命を同じかそれ以上にすることができる。 すなわち、 無駄の ない設計を実現することができ、 強度■耐久性を向上させた車輪用軸受装置 を提供することができる。  [0029] Here, in this embodiment, the pitch circle diameter PCDo of the 9 rows of outer poles is larger than the pitch circle diameter PCDi of the 10 rows of tapered rollers on the inner side (PCDo> PCDi) The 9 poles on the outer side are arranged closely spaced, and the number of poles is set to be larger than the number of tapered rollers 10 in the 10 row of inner ones. Has been. Therefore, overall bearing rigidity can be ensured and torque can be reduced, and the basic load rating of the inner side bearing row is larger than the basic load rating of the outer side bearing row and is applied to the inner side bearing row. Even if the load is larger than the load applied to the outer bearing row, the service life can be the same or longer. That is, it is possible to provide a wheel bearing device that can realize a design without waste and has improved strength and durability.
実施例 1  Example 1
[0030] 図 2は、 本発明に係る車輪用軸受装置の第 2の実施形態を示す縦断面図で ある。 なお、 この実施形態は、 前述した実施形態と基本的にはハブ輪の構成 が異なるだけで、 その他同一部品同一部位あるいは同一機能を有する部品■ 部位には同じ符号を付して詳細な説明を省略する。 [0031 ] この車輪用軸受装置は第 3世代と呼称される従動輪用であって、 外方部材 4と、 ハブ輪 1 3、 およびこのハブ輪 1 3の小径段部 1 3 bに圧入された内 輪 6からなる内方部材 1 4とを備えている。 ハブ輪 1 3は、 外周にアウター 側の外側転走面 4 aに対向するアウター側の内側転走面 1 3 aと、 この内側 転走面 1 3 aから軸方向に延びる小径段部 1 3 bが形成されている。 内輪 6 はこの小径段部 1 3 bに所定のシメシ口を介して圧入され、 加締部 1 cによ つて軸方向に固定されている。 FIG. 2 is a longitudinal sectional view showing a second embodiment of the wheel bearing device according to the present invention. Note that this embodiment is basically different from the above-described embodiment only in the configuration of the hub wheel, and other parts having the same parts or the same functions are denoted by the same reference numerals for detailed description. Omitted. [0031] This wheel bearing device is for a driven wheel called the third generation, and is press-fitted into the outer member 4, the hub wheel 1 3 and the small-diameter step portion 1 3 b of the hub wheel 13. And an inner member 14 composed of an inner ring 6. The hub wheel 1 3 has an outer outer rolling surface 4 a that faces the outer outer rolling surface 4 a on the outer periphery, and a small-diameter step portion 1 3 that extends in the axial direction from the inner rolling surface 1 3 a. b is formed. The inner ring 6 is press-fitted into the small-diameter step portion 13 b through a predetermined shim opening and is fixed in the axial direction by the crimping portion 1 c.
[0032] 外方部材 4とハブ輪 1 3および内輪 6との間に形成された環状空間の開口 部にはシール 1 5、 1 2が装着され、 軸受内部に封入されたグリースの外部 への漏洩と、 外部から雨水やダスト等が軸受内部に侵入するのを防止してい る。 また、 ハブ輪 1 3は S 5 3 C等の炭素 0 . 4 0〜0 . 8 0 w t %を含む 中高炭素鋼で形成され、 シール 1 5が摺接するシールランド部 3 bから内側 転走面 1 3 aおよび小径段部 1 3 bに亙って高周波焼入れによって表面硬さ を 5 8〜6 4 H R Cの範囲に硬化処理されている。  [0032] Seals 15 and 1 2 are attached to the openings of the annular space formed between the outer member 4 and the hub ring 13 and the inner ring 6, and the grease sealed inside the bearing is exposed to the outside. It prevents leakage and rainwater and dust from entering the bearing. The hub wheel 13 is made of medium and high carbon steel containing carbon 0.40 to 0.80 wt% such as S 53 C, and the inner rolling surface from the seal land portion 3 b in which the seal 15 is in sliding contact. The surface hardness is hardened to a range of 58 to 64 HRC by induction hardening over 1 3 a and small diameter step 1 3 b.
[0033] ここで、 本実施形態は、 前述した実施形態と同様、 アウター側のポール 9 列のピッチ円直径 P C D oがィンナ一側の円錐ころ 1 0列のピッチ円直径 P C D i よりも大径 (P C D o > P C D i ) に設定されると共に、 アウター側 のポール 9列のポール個数が、 インナ一側の円錐ころ 1 0列における円錐こ ろ 1 0の個数よりも多くなるように設定されている。 したがって、 一層装置 の軽量■ コンパク ト化を図りつつ、 全体の軸受剛性が高くなると共に低トル ク化が実現でき、 基本定格荷重がアウター側の軸受列部分の基本定格荷重よ りも大きくなり、 ィンナー側の軸受列部分に加わる荷重がアウター側の軸受 列部分に加わる荷重よりも大きくなつても寿命を同じかそれ以上にすること ができる。  Here, in the present embodiment, the pitch circle diameter PCD o of the outer pole 9 rows is larger than the pitch circle diameter PCD i of the 10 inner tapered rollers 10D, as in the above-described embodiment. (PCD o> PCD i) and the number of poles in the 9 outer rows of poles is set to be larger than the number of tapered rollers 10 in the 10 rows of inner ones. Yes. Therefore, while further reducing the weight and compactness of the device, the overall bearing rigidity can be increased and the torque can be reduced, and the basic load rating is greater than the basic load rating of the outer bearing row, Even if the load applied to the inner bearing row portion is larger than the load applied to the outer bearing row portion, the service life can be made the same or longer.
実施例 3  Example 3
[0034] 図 3は、 本発明に係る車輪用軸受装置の第 3の実施形態を示す縦断面図で ある。 なお、 この実施形態は、 前述した第 1の実施形態 (図 1 ) と基本的に は車輪用軸受の構成が異なるだけで、 その他同一部品同一部位あるいは同一 機能を有する部品■部位には同じ符号を付して詳細な説明を省略する。 FIG. 3 is a longitudinal sectional view showing a third embodiment of the wheel bearing device according to the present invention. Note that this embodiment is basically the same as the first embodiment (FIG. 1) described above except that the configuration of the wheel bearing is different, and other parts are the same or the same. Parts having functions ■ Parts are denoted by the same reference numerals, and detailed description thereof is omitted.
[0035] この車輪用軸受装置は第 2世代と呼称される従動輪用であって、 ハブ輪 1 と、 このハブ輪 1に固定された車輪用軸受 1 6とを備えている。 車輪用軸受 1 6は、 ハブ輪 1の肩部 1 aに衝合した状態で小径段部 1 bに所定のシメシ 口を介して圧入されると共に、 小径段部 1 bの端部を塑性変形させて形成し た加締部 1 cによって軸方向に固定されている。  This wheel bearing device is for a driven wheel called the second generation, and includes a hub wheel 1 and a wheel bearing 16 fixed to the hub wheel 1. The wheel bearing 16 is press-fitted into the small-diameter step portion 1b through a predetermined shim opening while being abutted against the shoulder portion 1a of the hub wheel 1, and the end of the small-diameter step portion 1b is plastically deformed. It is fixed in the axial direction by a caulking portion 1 c formed in this manner.
[0036] 車輪用軸受 1 6は、 外周に車体取付フランジ 4 cを一体に有し、 内周に複 列の外側転走面 1 7 a、 1 7 bが形成された外方部材 1 7と、 外周にこれら 複列の外側転走面 1 7 a、 1 7 bに対向する内側転走面 1 8 a、 1 9 aがそ れぞれ形成された 2つの内輪 1 8、 1 9と、 両転走面 1 7 a、 1 8 aおよび 1 7 b、 1 9 a間に保持器 20、 21を介して転動自在に収容された複数の 円錐ころ 1 0およびポール 9を備えている。  [0036] The wheel bearing 16 has an outer member 17 integrally formed with a vehicle body mounting flange 4c on the outer periphery and formed with a plurality of outer rolling surfaces 17a and 17b on the inner periphery. Two inner rings 1 8, 1 9 formed on the outer circumference with inner rolling surfaces 1 8 a, 1 9 a facing the double row outer rolling surfaces 17 a, 17 b, respectively, A plurality of tapered rollers 10 and poles 9 are provided between the rolling surfaces 17 a, 18 a and 17 b, 19 a so as to be freely rollable via cages 20, 21.
[0037] アウター側の各転走面 1 7 a、 1 8 aはテ一パ状に形成されると共に、 ィ ンナ一側の各転走面 1 7 b、 1 9 aは円弧状に形成されている。 そして、 ァ ウタ一側の内輪 1 8における内側転走面 1 8 aの大径側に円錐ころ 1 0を案 内するための大鍔 1 8 bと、 小径側に円錐ころ 1 0の脱落を防止するための 小鍔 1 8 cがそれぞれ形成されている。  [0037] The rolling surfaces 17a and 18a on the outer side are formed in a taper shape, and the rolling surfaces 17b and 19a on the inner side are formed in an arc shape. ing. Then, the large roller 1 8 b for setting the tapered roller 10 on the large-diameter side of the inner raceway 18 a in the inner ring 18 on the one side of the outer ring and the tapered roller 10 on the small-diameter side are dropped off. A small claw 1 8 c is formed for prevention.
[0038] 外方部材 1 7は S 53 C等の炭素 0. 40〜0. 80w t %を含む中高炭 素鋼で形成され、 複列の外側転走面 1 7 a、 1 7 bが高周波焼入れによって 表面硬さを 58〜64 H RCの範囲に硬化処理されている。 また、 内輪 1 8 、 1 9は S U J 2等の高炭素クロム鋼で形成され、 ズブ焼入れによって芯部 まで 58〜64 H RCの範囲に硬化処理されている。  [0038] The outer member 1 7 is formed of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S 53 C, and the double row outer rolling surfaces 1 7 a and 17 b are high frequency. Hardened by quenching to a surface hardness of 58-64 H RC. Inner rings 18 and 19 are made of high carbon chrome steel such as SU J 2 and hardened to the core by a quenching process in the range of 58 to 64 HRC.
[0039] ここで、 本実施形態は、 アウター側の円錐ころ 1 0列のピッチ円直径 PC D oがィンナ一側のポール 9列のピッチ円直径 P C D iがよりも大径 (PC Do>PCD i ) に設定されると共に、 インナ一側のポール 9列のポール個 数がアウター側の円錐ころ 1 0列のころ個数よりも多く設定されている。 こ れにより、 外方部材 1 7におけるインナ一側の外径 Dを小径に設定すること ができ、 インナ一側の軸受列の基本定格荷重を低下させることなくナックル サイズを小さくでき、 装置の軽量■ コンパク ト化を図ることができる。 また 、 アウター側の円錐ころ 1 0列におけるピッチ円直径 P C D oの拡径量に対 応してアウター側の内輪 1 8の肉厚を厚くすることにより、 ピッチ円直径 P C D o、 P C D i に違いがあってもハブ輪 1の小径段部 1 bをストレートな 軸状に形成することができ、 加工性を向上させることができる。 [0039] Here, in this embodiment, the outer side tapered roller 10 row pitch circle diameter PC D o is the inner one side pole 9 row pitch circle diameter PCD i larger than the diameter (PC Do> PCD i) and the number of poles in the 9 rows of inner ones is set to be larger than the number of rollers in the 10 rows of outer tapered rollers. As a result, the outer diameter D on the inner side of the outer member 17 can be set to a small diameter, and the knuckle can be kneaded without reducing the basic load rating of the inner side bearing row. The size can be reduced and the device can be made lighter and more compact. In addition, the outer diameter of the inner ring 18 on the outer side is increased in response to the amount of expansion of the pitch circle diameter PCD o in the outer row of tapered rollers 10 row, so that the difference between the pitch circle diameters PCD o and PCD i Even if there is, the small-diameter step portion 1b of the hub wheel 1 can be formed into a straight shaft, and the workability can be improved.
実施例 4  Example 4
[0040] 図 4は、 本発明に係る車輪用軸受装置の第 4の実施形態を示す縦断面図で ある。 なお、 この実施形態は、 前述した第 3の実施形態 (図 3 ) と基本的に は/ \ブ輪の構成が異なるだけで、 その他同一部品同一部位あるいは同一機能 を有する部品■部位には同じ符号を付して詳細な説明を省略する。  FIG. 4 is a longitudinal sectional view showing a fourth embodiment of the wheel bearing device according to the present invention. This embodiment is basically the same as the third embodiment described above (Fig. 3) except that the configuration of the wheel is different, and the other parts are the same or have the same function. Reference numerals are assigned and detailed description is omitted.
[0041 ] この車輪用軸受装置は第 3世代と呼称される従動輪用であって、 外方部材  [0041] This wheel bearing device is for a driven wheel called a third generation, and is an outer member.
1 7と、 ハブ輪 2 2、 およびこのハブ輪 2 2の小径段部 2 2 bに圧入された 内輪 1 9からなる内方部材 2 3とを備えている。 ハブ輪 2 2は、 外周に外方 部材 1 7のアウター側の外側転走面 1 7 aに対向するアウター側のテーパ状 の内側転走面 2 2 aと、 この内側転走面 2 2 aから軸方向に延びる小径段部 2 2 bが形成されている。 そして、 ァウタ一側の内側転走面 2 2 aの大径側 に円錐ころ 1 0を案内するための大鍔 1 8 bが形成されている。  17 and a hub wheel 2 2, and an inner member 23 consisting of an inner ring 19 pressed into a small-diameter step portion 2 2 b of the hub wheel 2 2. The hub wheel 2 2 has an outer tapered inner rolling surface 2 2 a facing the outer outer rolling surface 17 a of the outer member 17 on the outer periphery, and the inner rolling surface 2 2 a. A small-diameter step portion 2 2 b extending in the axial direction is formed. A large collar 18 b for guiding the tapered roller 10 is formed on the large diameter side of the inner rolling surface 22 a on the one side of the outer.
[0042] 内輪 1 9は小径段部 2 2 bに所定のシメシ口を介して圧入され、 加締部 1 cによって軸方向に固定されている。 また、 ハブ輪 2 2は S 5 3 C等の炭素 0 . 4 0〜0 . 8 0 w t %を含む中高炭素鋼で形成され、 シール 1 5が摺接 するシールランド部 3 bから内側転走面 2 2 aおよび小径段部 2 2 bに亙つ て高周波焼入れによって表面硬さを 5 8〜6 4 H R Cの範囲に硬化処理され ている。  [0042] The inner ring 19 is press-fitted into the small-diameter step portion 2 2 b through a predetermined shim opening and is fixed in the axial direction by the crimping portion 1 c. The hub wheel 2 2 is formed of medium and high carbon steel containing carbon 0.40 to 0.80 wt% such as S 53 C, and rolls inward from the seal land portion 3 b where the seal 15 is in sliding contact. The surface 22 2 a and the small diameter step 2 2 b are hardened by induction hardening in the range of 58 to 64 HRC.
[0043] ここで、 本実施形態は、 前述した実施形態と同様、 アウターの円錐ころ 1 0列のピッチ円直径 P C D oがィンナ一側側のポール 9列のピッチ円直径 P C D i よりも大径に設定されると共に、 インナ一側のポール 9列のポール個 数がアウター側の円錐ころ 1 0列のころ個数よりも多く設定されている。 こ れにより、 外方部材 1 7におけるインナ一側の外径 Dを小径にすることがで き、 インナ一側の軸受列の基本定格荷重を低下させることなくナックルサイ ズを小さくできる。 したがって、 一層装置の軽量■ コンパク ト化を図りつつ 、 全体の軸受剛性が高くなると共に低トルク化が実現でき、 基本定格荷重が アウター側の軸受列の基本定格荷重よりも大きくなり、 ィンナー側の軸受列 に加わる荷重がアウター側の軸受列部分に加わる荷重よりも大きくなっても 寿命を同じかそれ以上にすることができる。 [0043] Here, in the present embodiment, as in the above-described embodiment, the pitch circle diameter PCD o of the outer tapered roller 10 row is larger than the pitch circle diameter PCD i of the pole 9 row on the inner side. In addition, the number of poles in the 9 rows of inner side poles is set to be greater than the number of rollers in the 10 rows of outer tapered rollers. As a result, the outer diameter D on the inner side of the outer member 17 can be reduced. In addition, the knuckle size can be reduced without reducing the basic load rating of the inner bearing row. Therefore, while making the device lighter and more compact, the overall bearing rigidity can be increased and the torque can be reduced. The basic load rating is larger than the basic load rating of the outer bearing row. Even if the load applied to the bearing row is larger than the load applied to the outer bearing portion, the service life can be the same or longer.
実施例 5  Example 5
[0044] 図 5は、 本発明に係る車輪用軸受装置の第 5の実施形態を示す縦断面図で ある。 なお、 この実施形態は、 前述した第 1の実施形態 (図 1 ) と基本的に は左右両列のピッチ円直径が等しいだけで、 その他前述した実施形態と同一 部品同一部位あるいは同一機能を有する部品■部位には同じ符号を付して詳 細な説明を省略する。  FIG. 5 is a longitudinal sectional view showing a fifth embodiment of the wheel bearing device according to the invention. This embodiment is basically the same as the first embodiment described above (FIG. 1) except that the left and right rows have the same pitch circle diameter, and has the same components and the same functions as the previously described embodiments. Parts ■ Parts are denoted by the same reference numerals, and detailed description is omitted.
[0045] この車輪用軸受装置は第 2世代と呼称される従動輪用であって、 ハブ輪 1 と、 このハブ輪 1に固定された車輪用軸受 2 4とを備えている。 車輪用軸受 2 4は、 外周に車体取付フランジ 4 cを一体に有し、 内周に複列の外側転走 面 4 a、 2 5 aが形成された外方部材 2 5と、 外周にこれら複列の外側転走 面 4 a、 2 5 aに対向する内側転走面 5 a、 2 6 aがそれぞれ形成された 2 つの内輪 5、 2 6と、 両転走面 4 a、 5 aおよび 2 5 a、 2 6 a間に保持器 7、 2 7を介して転動自在に収容された複数のポール 9および円錐ころ 1 0 とを備えている。 外方部材 2 5と 2つの内輪 5、 2 6との間に形成された環 状空間の開口部にはシール 1 1、 2 8が装着され、 軸受内部に封入されたグ リースの外部への漏洩と、 外部から雨水やダスト等が軸受内部に侵入するの を防止している。  This wheel bearing device is for a driven wheel called the second generation, and includes a hub wheel 1 and a wheel bearing 24 fixed to the hub wheel 1. The wheel bearing 24 has an outer member 25 having a body mounting flange 4c integrally formed on the outer periphery and double row outer rolling surfaces 4a, 25a formed on the inner periphery, and these on the outer periphery. Two inner races 5, 2 6 formed with inner rolling surfaces 5a, 2 6a opposite to double row outer rolling surfaces 4a, 2 5a, and both rolling surfaces 4a, 5a and A plurality of poles 9 and tapered rollers 10 are provided between 2 5 a and 2 6 a so as to be freely rollable via cages 7 and 2 7. Seals 1 1 and 2 8 are installed in the opening of the annular space formed between the outer member 2 5 and the two inner rings 5 and 2 6, and the grease sealed inside the bearing is exposed to the outside. This prevents leakage and prevents rainwater and dust from entering the bearing.
[0046] アウター側の転走面 4 a、 5 aはポール 9にアンギユラコンタク トする円 弧状に形成されると共に、 インナ一側の転走面 2 5 a、 2 6 aは円錐ころ 1 0にラインコンタク トするテ一パ状に形成されている。 そして、 インナ一側 の内輪 2 6における内側転走面 2 6 aの大径側に円錐ころ 1 0を案内するた めの大鍔 6 bと、 小径側に円錐ころ 1 0の脱落を防止するための小鍔 6 cが それぞれ形成されている。 [0046] The outer rolling surface 4a, 5a is formed in an arc shape that contacts the pole 9 in an annulus, and the inner rolling surface 25a, 26a is a tapered roller 1 0 It is formed in a taper shape that makes line contact. The inner ring 26 on the inner side 26 is provided with a large flange 6 b for guiding the tapered roller 10 to the large diameter side of the inner rolling surface 26 a, and the tapered roller 10 is prevented from falling off on the small diameter side. Gavel for 6c Each is formed.
[0047] 外方部材 25は S 53 C等の炭素 0. 40〜0. 80w t %を含む中高炭 素鋼で形成され、 複列の外側転走面 4 a、 25 aが高周波焼入れによって表 面硬さを 58〜64 H RCの範囲に硬化処理されている。 また、 内輪 26は S U J 2等の高炭素クロム鋼で形成され、 ズブ焼入れによって芯部まで 58 〜64 H RCの範囲に硬化処理されている。  [0047] The outer member 25 is formed of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S 53 C, and the double-row outer rolling surfaces 4 a and 25 a are represented by induction hardening. Hardened to a surface hardness of 58 to 64 H RC. The inner ring 26 is made of high carbon chrome steel such as SU J 2 and is hardened in the range of 58 to 64 H RC up to the core part by quenching.
[0048] ここで、 本実施形態では、 アウター側のポール 9のピッチ円直径 PCDo とインナ一側の円錐ころ 1 0のピッチ円直径 PC D iが同一 (PCDo = P CD i ) に設定されると共に、 アウター側のポール 9列が間隔を詰めて配列 され、 そのポール個数が、 インナ一側の円錐ころ 1 0列のころ個数よりも多 くなるように設定されている。 したがって、 全体の軸受剛性が確保できると 共に、 ィンナー側の軸受列の基本定格荷重がアウター側の軸受列の基本定格 荷重よりも大きくなり、 ィンナー側の軸受列に加わる荷重がアウター側の軸 受列に加わる荷重よりも大きくなつても寿命を同じかそれ以上にすることが できる。 すなわち、 無駄のない設計を実現することができ、 強度■耐久性を 向上させた車輪用軸受装置を提供することができる。  [0048] Here, in the present embodiment, the pitch circle diameter PCDo of the outer pole 9 and the pitch circle diameter PCDi of the inner tapered roller 10 are set to be the same (PCDo = PCDi). In addition, 9 rows of poles on the outer side are arranged at close intervals, and the number of poles is set to be larger than the number of rollers in the 10 rows of tapered rollers on the inner side. Therefore, the overall bearing rigidity can be secured, and the basic load rating of the inner bearing row is larger than the basic load rating of the outer side bearing row, so that the load applied to the inner side bearing row is the outer bearing. Even if it is larger than the load applied to the row, the service life can be the same or longer. That is, it is possible to provide a wheel bearing device that can realize a design without waste and has improved strength and durability.
実施例 6  Example 6
[0049] 図 6は、 本発明に係る車輪用軸受装置の第 6の実施形態を示す縦断面図で ある。 なお、 この実施形態は、 前述した第 5の実施形態 (図 5) と基本的に はハブ輪の構成が異なるだけで、 その他前述した実施形態と同一部品同一部 位あるいは同一機能を有する部品■部位には同じ符号を付して詳細な説明を 省略する。  FIG. 6 is a longitudinal sectional view showing a sixth embodiment of the wheel bearing device according to the present invention. This embodiment basically differs from the above-described fifth embodiment (FIG. 5) only in the configuration of the hub wheel, and other parts having the same parts and the same functions as the above-described embodiments. Parts are denoted by the same reference numerals and detailed description thereof is omitted.
[0050] この車輪用軸受装置は第 3世代と呼称される従動輪用であって、 外方部材 25と、 ハブ輪 1 3、 およびこのハブ輪 1 3の小径段部 1 3 bに圧入された 内輪 26からなる内方部材 29とを備えている。  [0050] This wheel bearing device is for a driven wheel called the third generation, and is press-fitted into the outer member 25, the hub wheel 1 3 and the small diameter step portion 1 3 b of the hub wheel 13. And an inner member 29 composed of an inner ring 26.
[0051] ここで、 本実施形態は、 前述した実施形態と同様、 アウター側のポール 9 列のピッチ円直径 P C D oとィンナ一側の円錐ころ 1 0列のピッチ円直径 P CD iが同一 (PCDo = PCD i ) に設定されると共に、 アウター側のポ —ル 9列のポール個数が、 インナ一側の円錐ころ 1 0列のころ個数よりも多 くなるように設定されている。 したがって、 一層装置の軽量■ コンパク ト化 を図りつつ、 全体の軸受剛性が高くなると共に、 基本定格荷重がアウター側 の軸受列部分の基本定格荷重よりも大きくなり、 ィンナー側の軸受列部分に 加わる荷重がアウター側の軸受列部分に加わる荷重よりも大きくなっても寿 命を同じかそれ以上にすることができる。 [0051] Here, in this embodiment, the pitch circle diameter PCDo of the 9 rows of outer poles and the pitch circle diameter PCDi of the 10 rows of tapered rollers 10 on the inner side are the same as in the embodiment described above. PCDo = PCD i) and the outer side — The number of poles in the 9th row is set to be greater than the number of tapered rollers on the 10th row of the inner one. Therefore, while making the device lighter and more compact, the overall bearing rigidity is increased, and the basic load rating is larger than the basic load rating of the outer bearing row, which is applied to the inner bearing row portion. Even if the load becomes larger than the load applied to the outer bearing section, the life can be made the same or more.
実施例 7  Example 7
[0052] 図 7は、 本発明に係る車輪用軸受装置の第 7の実施形態を示す縦断面図で ある。 なお、 この実施形態は、 前述した第 3の実施形態 (図 3 ) と基本的に は左右両列のピッチ円直径が等しいだけで、 その他前述した実施形態と同一 部品同一部位あるいは同一機能を有する部品■部位には同じ符号を付して詳 細な説明を省略する。  FIG. 7 is a longitudinal sectional view showing a seventh embodiment of the wheel bearing device according to the present invention. This embodiment is basically the same as the above-described third embodiment (FIG. 3) except that both the left and right rows have the same pitch circle diameter, and has the same parts and the same functions as the above-described embodiments. Parts ■ Parts are denoted by the same reference numerals, and detailed description is omitted.
[0053] この車輪用軸受装置は第 2世代と呼称される従動輪用であって、 ハブ輪 1 と、 このハブ輪 1に固定された車輪用軸受 3 0とを備えている。 車輪用軸受 3 0は、 ハブ輪 1の肩部 1 aに衝合した状態で小径段部 1 bに所定のシメシ 口を介して圧入されると共に、 小径段部 1 bの端部を塑性変形させて形成し た加締部 1 cによって軸方向に固定されている。  This wheel bearing device is for a driven wheel called the second generation, and includes a hub wheel 1 and a wheel bearing 30 fixed to the hub wheel 1. The wheel bearing 30 is press-fitted into the small-diameter step portion 1b through a predetermined shim opening while being abutted against the shoulder portion 1a of the hub wheel 1, and the end of the small-diameter step portion 1b is plastically deformed. It is fixed in the axial direction by a caulking portion 1 c formed in this manner.
[0054] 車輪用軸受 3 0は、 外周に車体取付フランジ 4 cを一体に有し、 内周に複 列の外側転走面 1 7 a、 3 1 aが形成された外方部材 3 1 と、 外周にこれら 複列の外側転走面 1 7 a、 3 1 aに対向する内側転走面 1 8 a、 3 2 aがそ れぞれ形成された 2つの内輪 1 8、 3 2と、 両転走面 1 7 a、 1 8 aおよび 3 1 a , 3 2 a間に保持器 2 0、 3 3を介して転動自在に収容された複数の 円錐ころ 1 0およびポール 9を備えている。  [0054] The wheel bearing 30 has an outer member 3 1 integrally formed with a vehicle body mounting flange 4c on the outer periphery, and formed with a plurality of outer rolling surfaces 17a, 31a on the inner periphery. Two inner rings 1 8 and 3 2 formed on the outer periphery with inner rolling surfaces 1 8 a and 3 2 a facing the double row outer rolling surfaces 1 7 a and 3 1 a, respectively, Provided with a plurality of tapered rollers 10 and poles 9, which are rotatably accommodated through cages 20, 3 3 between both rolling surfaces 1 7 a, 1 8 a and 3 1 a, 3 2 a Yes.
[0055] アウター側の各転走面 1 7 a、 1 8 aはテ一パ状に形成されると共に、 ィ ンナ一側の各転走面 3 1 a、 3 2 aは円弧状に形成されている。 そして、 ァ ウタ一側の内輪 1 8における内側転走面 1 8 aの大径側に円錐ころ 1 0を案 内するための大鍔 1 8 bと、 小径側に円錐ころ 1 0の脱落を防止するための 小鍔 1 8 cがそれぞれ形成されている。 [0056] 外方部材 3 1は S 5 3 C等の炭素 0 . 4 0〜0 . 8 0 w t %を含む中高炭 素鋼で形成され、 複列の外側転走面 1 7 a、 3 1 aが高周波焼入れによって 表面硬さを 5 8〜6 4 H R Cの範囲に硬化処理されている。 また、 内輪 3 2 は S U J 2等の高炭素クロム鋼で形成され、 ズブ焼入れによって芯部まで 5 8〜6 4 H R Cの範囲に硬化処理されている。 [0055] Each rolling surface 17a, 18a on the outer side is formed in a taper shape, and each rolling surface 3 1a, 3 2a on the inner side is formed in an arc shape. ing. Then, the large roller 1 8 b for setting the tapered roller 10 on the large-diameter side of the inner raceway 18 a in the inner ring 18 on the one side of the outer ring and the tapered roller 10 on the small-diameter side are dropped off. A small claw 1 8 c is formed for prevention. [0056] The outer member 3 1 is formed of medium-high carbon steel containing carbon 0.40-0.80 wt% such as S 5 3 C, and double row outer rolling surfaces 1 7 a, 3 1 a is hardened by induction hardening to a surface hardness in the range of 58 to 64 HRC. The inner ring 3 2 is made of high carbon chrome steel such as SUJ 2 and hardened in the range of 58 to 64 HRC up to the core part by quenching.
[0057] ここで、 本実施形態は、 アウター側の円錐ころ 1 0列のピッチ円直径 P C D oとィンナ一側のポール 9列のピツチ円直径 P C D iが同一 ( P C D o = P C D i ) に設定されると共に、 インナ一側のポール 9列のポール個数がァ ウタ一側の円錐ころ 1 0列のころ個数よりも多く設定されている。 これによ り、 インナ一側の軸受列の基本定格荷重を低下させることなく軸受の回転ト ルクを低減することができ、 装置の軽量■ コンパク ト化を図ることができる 実施例 8  Here, in this embodiment, the pitch circle diameter PCD o of the outer row of tapered rollers 10 and the pitch circle diameter PCD i of the 9 rows of poles on the inner side are set to be the same (PCD o = PCD i). At the same time, the number of poles in the nine rows of inner side poles is set to be greater than the number of tapered rollers in the outer row of 10 rows. As a result, the rotational torque of the bearing can be reduced without lowering the basic load rating of the bearing row on the inner side, and the device can be made lighter and more compact.
[0058] 図 8は、 本発明に係る車輪用軸受装置の第 8の実施形態を示す縦断面図で ある。 なお、 この実施形態は、 前述した第 7の実施形態 (図 7 ) と基本的に はハブ輪の構成が異なるだけで、 その他前述した実施形態と同一部品同一部 位あるいは同一機能を有する部品■部位には同じ符号を付して詳細な説明を 省略する。  FIG. 8 is a longitudinal sectional view showing an eighth embodiment of the wheel bearing device according to the invention. This embodiment basically differs from the above-described seventh embodiment (FIG. 7) only in the configuration of the hub wheel, and other parts having the same parts and the same functions as the above-described embodiments. Parts are denoted by the same reference numerals and detailed description thereof is omitted.
[0059] この車輪用軸受装置は第 3世代と呼称される従動輪用であって、 外方部材 3 1 と、 ハブ輪 2 2、 およびこのハブ輪 2 2の小径段部 2 2 bに圧入された 内輪 3 2からなる内方部材 3 4とを備えている。  [0059] This wheel bearing device is for a driven wheel called the third generation, and is press-fitted into the outer member 3 1, the hub wheel 2 2, and the small-diameter step portion 2 2 b of the hub wheel 2 2. And an inner member 3 4 composed of the inner ring 3 2.
[0060] ここで、 本実施形態は、 前述した実施形態と同様、 アウターの円錐ころ 1 0列のピッチ円直径 P C D oとィンナ一側側のポール 9列のピッチ円直径 P C D iが同一 (P C D o = P C D i ) に設定されると共に、 インナ一側のポ ール 9列のポール個数がアウター側の円錐ころ 1 0列のころ個数よりも多く 設定されている。 インナ一側の軸受列の基本定格荷重を低下させることなく 軸受の回転トルクを低減することができると共に、 装置の一層の軽量■ コン パク ト化を図ることができる。 実施例 9 [0060] Here, in the present embodiment, as in the above-described embodiment, the pitch circle diameter PCD o of the outer row of tapered rollers 10 and the pitch circle diameter PCD i of the 9 rows of poles on the inner side are the same (PCD o = PCD i), and the number of poles in the 9 rows of the inner side is larger than the number of rollers in the 10 rows of outer tapered rollers. It is possible to reduce the rotational torque of the bearing without reducing the basic load rating of the inner side bearing row, and to further reduce the weight of the device. Example 9
[0061 ] 図 9は、 本発明に係る車輪用軸受装置の第 9の実施形態を示す縦断面図で ある。 なお、 この実施形態は、 前述した第 5の実施形態 (図 5 ) と基本的に は両軸受列のピッチ円直径が異なるだけで、 その他前述した実施形態と同一 部品同一部位あるいは同一機能を有する部品■部位には同じ符号を付して詳 細な説明を省略する。  FIG. 9 is a longitudinal sectional view showing a ninth embodiment of the wheel bearing device according to the invention. This embodiment is basically the same as the above-described fifth embodiment (FIG. 5) except that the pitch circle diameters of both bearing rows are the same. Parts ■ Parts are denoted by the same reference numerals, and detailed description is omitted.
[0062] この車輪用軸受装置は第 2世代と呼称される従動輪用であって、 ハブ輪 1 と、 このハブ輪 1に固定された車輪用軸受 3 5とを備えている。 車輪用軸受 3 5は、 外周に車体取付フランジ 4 cを一体に有し、 内周に複列の外側転走 面 4 a、 3 6 aが形成された外方部材 3 6と、 外周にこれら複列の外側転走 面 4 a、 3 6 aに対向する内側転走面 5 a、 3 7 aがそれぞれ形成された 2 つの内輪 5、 3 7と、 両転走面 4 a、 5 aおよび 3 6 a、 3 7 a間に保持器 7、 3 8を介して転動自在に収容された複数のポール 9および円錐ころ 1 0 とを備えている。 外方部材 3 6と内輪 5、 3 7との間に形成された環状空間 の開口部にはシール 1 1、 3 9が装着され、 軸受内部に封入されたグリース の外部への漏洩と、 外部から雨水やダスト等が軸受内部に侵入するのを防止 している。  This wheel bearing device is for a driven wheel called a second generation, and includes a hub wheel 1 and a wheel bearing 35 fixed to the hub wheel 1. The wheel bearing 35 has an outer member 3 6 having a body mounting flange 4 c integrally formed on the outer periphery and double row outer rolling surfaces 4 a, 3 6 a formed on the inner periphery, and these on the outer periphery. Two inner races 5, 3 7 formed with inner rolling surfaces 5 a, 3 7 a opposite to double row outer rolling surfaces 4 a, 3 6 a, and both rolling surfaces 4 a, 5 a and A plurality of poles 9 and tapered rollers 10 that are rotatably accommodated via cages 7 and 3 8 are provided between 3 6 a and 3 7 a. Seals 1 1 and 3 9 are installed in the opening of the annular space formed between the outer member 3 6 and the inner rings 5 and 7, and leakage of grease sealed inside the bearing This prevents rainwater and dust from entering the bearing.
[0063] 外方部材 3 6は S 5 3 C等の炭素 0 . 4 0〜0 . 8 0 w t %を含む中高炭 素鋼で形成され、 複列の外側転走面 4 a、 3 6 aが高周波焼入れによって表 面硬さを 5 8〜6 4 H R Cの範囲に硬化処理されている。 また、 内輪 3 7は S U J 2等の高炭素クロム鋼で形成され、 ズブ焼入れによって芯部まで 5 8 〜6 4 H R Cの範囲に硬化処理されている。  [0063] The outer member 3 6 is formed of medium-high carbon steel containing carbon 0.40-0.80 wt% such as S 5 3 C, and double row outer rolling surfaces 4 a, 3 6 a However, it has been hardened by induction hardening to a surface hardness of 58-64 HRC. The inner ring 37 is made of high carbon chrome steel such as SUJ2, and is hardened in the range of 58 to 64 HR C to the core part by quenching.
[0064] ここで、 本実施形態は、 インナ一側の円錐ころ 1 0列のピッチ円直径 P C D iがァゥタ一側のポール 9列のピッチ円直径 P C D oよりも大径 ( P C D i > P C D o ) に設定されると共に、 アウター側のポール 9列のポール個数 がインナ一側の円錐ころ 1 0列のころ個数よりも多く設定されている。 これ により、 装置の軽量■ コンパク ト化を図りつつ、 全体の軸受剛性が高くなる と共に、 インナ一側の軸受列の基本定格荷重を増大させ、 インナ一側の軸受 列に加わる荷重がアウター側の軸受列部分に加わる荷重よりも大きくなって も寿命を同じかそれ以上にすることができる。 また、 インナ一側の円錐ころ 1 0列におけるピッチ円直径 P C D iの拡径量に対応してインナ一側の内輪 3 7の肉厚が厚くなつて剛性が高くなるため、 加締加工によって内輪 3 7に 発生するフープ応力を抑えることができ、 内輪 3 7の耐久性を向上させるこ とができる。 [0064] Here, in this embodiment, the pitch circle diameter PCD i of the inner one side tapered roller 10 row is larger than the pitch circle diameter PCD o of the ninth row pole 9 row (PCD i> PCD o ) And the number of poles in the 9 outer rows of poles is set to be greater than the number of tapered rollers in the 10 inner rows. This makes the device lighter and more compact, while increasing the overall bearing rigidity and increasing the basic load rating of the inner one side bearing row. Even if the load applied to the row is greater than the load applied to the outer bearing row, the life can be made the same or longer. Also, since the inner ring 37 has a thicker wall and the rigidity is increased corresponding to the diameter expansion of the pitch circle diameter PCD i in the row of tapered rollers 10 on the inner side, the inner ring The hoop stress generated in 37 can be suppressed, and the durability of the inner ring 37 can be improved.
実施例 10  Example 10
[0065] 図 1 0は、 本発明に係る車輪用軸受装置の第 1 0の実施形態を示す縦断面 図である。 なお、 この実施形態は、 前述した第 9の実施形態 (図 9 ) と基本 的にはハブ輪の構成が異なるだけで、 その他前述した実施形態と同一部品同 一部位あるいは同一機能を有する部品■部位には同じ符号を付して詳細な説 明を省略する。  FIG. 10 is a longitudinal sectional view showing a tenth embodiment of the wheel bearing device according to the present invention. This embodiment basically differs from the above-described ninth embodiment (FIG. 9) only in the configuration of the hub wheel, and other parts having the same parts, the same parts, and the same functions as the above-described embodiments. The parts are denoted by the same reference numerals and detailed description is omitted.
[0066] この車輪用軸受装置は第 3世代と呼称される従動輪用であって、 外方部材 3 6と、 ハブ輪 1 3、 およびこのハブ輪 1 3の小径段部 1 3 bに圧入された 内輪 3 7からなる内方部材 4 0とを備えている。  [0066] This wheel bearing device is for a driven wheel called the third generation, and is press-fitted into the outer member 36, the hub wheel 13 and the small-diameter step portion 13b of the hub wheel 13 And an inner member 40 composed of an inner ring 37.
[0067] ここで、 本実施形態は、 前述した実施形態と同様、 インナ一側の円錐ころ  [0067] Here, in the present embodiment, the tapered roller on the inner side is the same as the above-described embodiment.
1 0列のピッチ円直径 P C D iがアウター側のポール 9列のピッチ円直径 P C D oよりも大径 (P C D i > P C D o ) に設定されると共に、 アウター側 のポール 9列のポール個数が、 インナ一側の円錐ころ 1 0列のころ個数より も多く設定されている。 これにより、 インナ一側の軸受列の基本定格荷重を 増大させ、 ィンナー側の軸受列に加わる荷重がアウター側の軸受列部分に加 わる荷重よりも大きくなっても寿命を同じかそれ以上にすることができると 共に、 装置の一層の軽量■ コンパク ト化を図ることができる。 また、 インナ 一側の内輪 3 7の肉厚が厚くなり、 加締加工によって内輪 3 7に発生するフ ープ応力を抑えて内輪 3 7の耐久性を向上させることができる。  10 Pitch circle diameter PCD i is set to a larger diameter than the 9th pitch circle diameter PCD o of the outer pole (PCD i> PCD o), and the number of poles in the outer pole 9 rows is The number of tapered rollers on the inner side is set more than the number of rollers in the 10th row. This increases the basic load rating of the inner-side bearing row, and makes the service life the same or longer even if the load applied to the inner-side bearing row is greater than the load applied to the outer-side bearing row. In addition, the device can be made lighter and more compact. Further, the inner ring 37 on the inner side is thickened, and the oop stress generated in the inner ring 37 due to the caulking process can be suppressed, and the durability of the inner ring 37 can be improved.
実施例 1 1  Example 1 1
[0068] 図 1 1は、 本発明に係る車輪用軸受装置の第 1 1の実施形態を示す縦断面 図である。 なお、 この実施形態は、 前述した第 9の実施形態 (図 9 ) と基本 的にはハブ輪と車輪用軸受の構成が一部異なるだけで、 その他前述した実施 形態と同一部品同一部位あるいは同一機能を有する部品■部位には同じ符号 を付して詳細な説明を省略する。 FIG. 11 is a longitudinal sectional view showing a first embodiment of the wheel bearing device according to the present invention. This embodiment is the same as the ninth embodiment (FIG. 9) described above. In fact, the configuration of the hub wheel and the wheel bearing is only partially different, and other parts that have the same parts or the same functions as the above-described embodiment .
[0069] この車輪用軸受装置は第 2世代と呼称される従動輪用であって、 ハブ輪 1 ' と、 このハブ輪 1 ' に固定された車輪用軸受 35' とを備えている。 車輪 用軸受 35' は、 外周に車体取付フランジ 4 cを一体に有し、 内周に複列の 外側転走面 4 a、 36 aが形成された外方部材 36と、 外周にこれら複列の 外側転走面 4 a、 36 aに対向する内側転走面 5 a、 37 aがそれぞれ形成 された 2つの内輪 5' 、 37' と、 両転走面 4 a、 5 aおよび 36 a、 37 a間に保持器 7、 38を介して転動自在に収容された複数のポール 9および 円錐ころ 1 0とを備えている。  [0069] This wheel bearing device is for a driven wheel referred to as a second generation, and includes a hub wheel 1 'and a wheel bearing 35' fixed to the hub wheel 1 '. The wheel bearing 35 'has a body mounting flange 4c integrally formed on the outer periphery, an outer member 36 having double rows of outer rolling surfaces 4a and 36a formed on the inner periphery, and these double rows on the outer periphery. Two inner rings 5 'and 37' formed with inner rolling surfaces 5a and 37a opposite to the outer rolling surfaces 4a and 36a, and both rolling surfaces 4a, 5a and 36a, A plurality of poles 9 and tapered rollers 10 accommodated in a freely rolling manner via cages 7 and 38 are provided between 37a.
[0070] ハブ輪 1 ' は、 前述した第 9の実施形態におけるハブ輪 1に対して、 小径 段部 1 b' の外径が大径に形成されている。 また、 この小径段部 1 b' の拡 径に伴い、 内輪 5' 、 37' の肉厚が薄肉に形成されている。 これにより、 車輪用軸受 35' の外径を大きくすることなくハブ輪 1 ' の小径段部 1 b' が拡径されているため、 装置の軽量■ コンパク ト化を図ると共に、 ハブ輪 1 ' の強度■剛性を高めることができる。  In the hub wheel 1 ′, the outer diameter of the small-diameter step portion 1 b ′ is larger than that of the hub wheel 1 in the ninth embodiment described above. In addition, the inner rings 5 'and 37' are made thinner as the small-diameter step portion 1b 'expands. As a result, the diameter of the small-diameter step 1 b 'of the hub wheel 1 ′ is increased without increasing the outer diameter of the wheel bearing 35 ′, thereby reducing the weight of the device and making the hub wheel 1 ′ compact. ■ Strength can be increased.
実施例 12  Example 12
[0071] 図 1 2は、 本発明に係る車輪用軸受装置の第 1 2の実施形態を示す縦断面 図である。 なお、 この実施形態は、 前述した第 1 0の実施形態 (図 1 0) と 基本的にはハブ輪と内輪の構成が一部異なるだけで、 その他前述した同一部 品同一部位あるいは同一機能を有する部品■部位には同じ符号を付して詳細 な説明を省略する。  FIG. 12 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention. This embodiment is basically the same as the above-described 10th embodiment (FIG. 10) except that the configuration of the hub ring and the inner ring is partially different, and the same parts and functions as described above are the same. Parts to have ■ Same parts are given the same reference numerals and detailed explanations are omitted.
[0072] この車輪用軸受装置は第 2世代と呼称される従動輪用であって、 外方部材 36と、 ハブ輪 1 3' 、 およびこのハブ輪 1 3' の小径段部 1 3 b' に圧入 された内輪 37' からなる内方部材 40' とを備えている。  [0072] This wheel bearing device is for a driven wheel called the second generation, and includes an outer member 36, a hub wheel 1 3 ', and a small-diameter step portion 1 3 b' of the hub wheel 1 3 '. And an inner member 40 'composed of an inner ring 37' press-fitted into the inner ring.
[0073] ハブ輪 1 3' は、 前述した第 1 0の実施形態におけるハブ輪 1 3に対して 、 小径段部 1 3 b' の外径が大径に形成されている。 また、 この小径段部 1 3 b' の拡径に伴い、 内輪 37' の肉厚が薄肉に形成されている。 これによ り、 外方部材 36の外径を大きくすることなくハブ輪 1 3' の小径段部 1 3 b' が拡径されているため、 装置の軽量 . コンパク ト化を図ると共に、 ハブ 輪 1 3' の強度■剛性を高めることができる。 In the hub wheel 13 3 ′, the outer diameter of the small diameter step portion 13 b ′ is formed larger than the hub wheel 13 in the tenth embodiment described above. This small diameter step 1 As the diameter of 3 'increases, the inner ring 37' becomes thinner. As a result, the diameter of the small diameter step portion 1 3 b 'of the hub wheel 1 3' is increased without increasing the outer diameter of the outer member 36, thereby reducing the weight of the device and reducing the size of the hub. Strength of wheel 1 3 '■ Rigidity can be increased.
実施例 13  Example 13
[0074] 図 1 3は、 本発明に係る車輪用軸受装置の第 1 3の実施形態を示す縦断面 図である。 なお、 この実施形態は、 前述した第 7の実施形態 (図 7) と基本 的には両軸受列のピッチ円直径が異なるだけで、 その他前述した実施形態と 同一部品同一部位あるいは同一機能を有する部品■部位には同じ符号を付し て詳細な説明を省略する。  FIG. 13 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention. This embodiment is basically the same as the above-described seventh embodiment (FIG. 7) except that the pitch circle diameters of both bearing rows are different, and has the same parts and the same functions as the above-described embodiments. Parts ■ Parts are denoted by the same reference numerals and detailed description is omitted.
[0075] この車輪用軸受装置は第 2世代と呼称される従動輪用であって、 ハブ輪 1 と、 このハブ輪 1に固定された車輪用軸受 41 とを備えている。 車輪用軸受 41は、 外周に車体取付フランジ 4 cを一体に有し、 内周に複列の外側転走 面 1 7 a、 42 aが形成された外方部材 42と、 外周にこれら複列の外側転 走面 1 7 a、 42 aに対向する内側転走面 1 8 a、 43 aがそれぞれ形成さ れた 2つの内輪 1 8、 43と、 両転走面 1 7 a、 1 8 aおよび 42 a、 43 a間に保持器 20、 44を介して転動自在に収容された複数の円錐ころ 1 0 およびポール 9とを備えている。  This wheel bearing device is for a driven wheel called a second generation, and includes a hub wheel 1 and a wheel bearing 41 fixed to the hub wheel 1. The wheel bearing 41 has a vehicle body mounting flange 4 c integrally formed on the outer periphery, an outer member 42 formed with double row outer rolling surfaces 17 a and 42 a on the inner periphery, and these double rows on the outer periphery. Outer rolling surfaces 1 7 a, 42 a opposite inner rolling surfaces 1 8 a, 43 a formed two inner rings 1 8, 43, and both rolling surfaces 1 7 a, 1 8 a And a plurality of tapered rollers 10 and poles 9 which are rotatably accommodated through cages 20 and 44 between 42a and 43a.
[0076] 外方部材 42は S 53 C等の炭素 0. 40〜0. 80w t %を含む中高炭 素鋼で形成され、 複列の外側転走面 1 7 a、 42 aが高周波焼入れによって 表面硬さを 58〜64 H RCの範囲に硬化処理されている。 また、 内輪 43 は S U J 2等の高炭素クロム鋼で形成され、 ズブ焼入れによって芯部まで 5 8〜64 H RCの範囲に硬化処理されている。  [0076] The outer member 42 is formed of medium and high carbon steel containing 0.40 to 0.80 wt% of carbon such as S 53 C, and the double row outer rolling surfaces 1 7 a and 42 a are obtained by induction hardening. Hardened to a surface hardness of 58-64 H RC. The inner ring 43 is made of high carbon chrome steel such as SU J 2 and is hardened in the range of 58 to 64 H RC up to the core part by quenching.
[0077] ここで、 本実施形態は、 ィンナ一側のポール 9列のピッチ円直径 P C D i がアウター側の円錐ころ 1 0列のピッチ円直径 P CD oよりも大径 (PCD i >PCDo) に設定されると共に、 インナ一側のポール 9列のポール個数 がアウター側の円錐ころ 1 0列のころ個数よりも多く設定されている。 これ により、 装置の軽量■ コンパク ト化を図りつつ、 全体の軸受剛性が高くなる と共に、 インナ一側の軸受列の基本定格荷重を増大させ、 インナ一側の軸受 列に加わる荷重がアウター側の軸受列部分に加わる荷重よりも大きくなって も寿命を同じかそれ以上にすることができる。 また、 インナ一側のポール 9 列におけるピッチ円直径 P C D iの拡径量に対応してィンナ一側の内輪 4 3 の肉厚が厚くなつて剛性が高くなるため、 加締加工によって内輪 4 3に発生 するフープ応力を抑えることができ、 内輪 4 3の耐久性を向上させることが できる。 [0077] Here, in this embodiment, the pitch circle diameter PCD i of the nine poles on the inner side is larger than the pitch circle diameter PCDo of the outer tapered roller 10 rows (PCD i> PCDo). The number of poles in the 9 rows of inner inner poles is set to be greater than the number of rollers in the 10 outer rows of tapered rollers. As a result, the overall weight of the bearing is increased while making the device lighter and more compact. At the same time, increase the basic load rating of the inner-side bearing row so that the service life will be the same or longer even if the load applied to the inner-side bearing row is greater than the load applied to the outer-side bearing row. Can do. In addition, the inner ring 4 3 on the inner side 4 3 is thickened to increase the rigidity corresponding to the amount of expansion of the pitch circle diameter PCD i in the 9 rows of poles on the inner side. The hoop stress generated in the inner ring 43 can be suppressed, and the durability of the inner ring 43 can be improved.
実施例 14  Example 14
[0078] 図 1 4は、 本発明に係る車輪用軸受装置の第 1 4の実施形態を示す縦断面 図である。 なお、 この実施形態は、 前述した第 1 3の実施形態 (図 1 3 ) と 基本的にはハブ輪の構成が異なるだけで、 その他前述した同一部品同一部位 あるいは同一機能を有する部品■部位には同じ符号を付して詳細な説明を省 略する。  FIG. 14 is a longitudinal sectional view showing a 14th embodiment of a wheel bearing device according to the present invention. Note that this embodiment is basically different from the above-mentioned first to third embodiments (Fig. 13) except that the configuration of the hub wheel is basically the same. Are denoted by the same reference numerals, and detailed description is omitted.
[0079] この車輪用軸受装置は第 3世代と呼称される従動輪用であって、 外方部材 4 2と、 ハブ輪 2 2、 およびこのハブ輪 2 2の小径段部 2 2 bに圧入された 内輪 4 3からなる内方部材 4 5とを備えている。  [0079] This wheel bearing device is for a driven wheel called the third generation, and is press-fitted into the outer member 4 2, the hub wheel 2 2, and the small-diameter step portion 2 2 b of the hub wheel 2 2. And an inner member 4 5 composed of the inner ring 4 3.
[0080] ここで、 本実施形態は、 前述した実施形態と同様、 インナ一側のポール 9 列のピッチ円直径 P C D iがァウタ一側の円錐ころ 1 0列のピッチ円直径 P C D oよりも大径 (P C D i > P C D o ) に設定されると共に、 インナ一側 のポール 9列のポール個数が、 アウター側の円錐ころ 1 0列のころ個数より も多く設定されている。 これにより、 インナ一側の軸受列の基本定格荷重を 低下させることなく、 また、 軸受の回転トルクを増大させることなく、 強度 ■剛性を高め、 かつ装置の一層の軽量■ コンパク ト化を図ることができる。 また、 インナ一側の内輪 4 3の肉厚が厚くなり、 加締加工によって内輪 4 3 に発生するフープ応力を抑えて耐久性を向上させることができる。  [0080] Here, in this embodiment, the pitch circle diameter PCD i of the nine rows of poles on the inner side is larger than the pitch circle diameter PCD o of the ten rows of tapered rollers on the one side, as in the embodiment described above. The diameter (PCD i> PCD o) is set, and the number of poles in the inner row of 9 rows of poles is set to be larger than the number of rollers in the outer row of tapered rollers of 10 rows. As a result, the strength, rigidity, and weight of the device can be increased without compromising the basic load rating of the bearing row on the inner side and without increasing the rotational torque of the bearing. Can do. In addition, the inner ring 43 on the inner side is thicker, and the hoop stress generated in the inner ring 43 due to the caulking process can be suppressed to improve the durability.
実施例 15  Example 15
[0081 ] 図 1 5は、 本発明に係る車輪用軸受装置の第 1 5の実施形態を示す縦断面 図である。 なお、 この実施形態は、 前述した第 1 3の実施形態 (図 1 3 ) と 基本的にはハブ輪と車輪用軸受の構成が一部異なるだけで、 その他前述した 実施形態と同一部品同一部位あるいは同一機能を有する部品■部位には同じ 符号を付して詳細な説明を省略する。 FIG. 15 is a longitudinal sectional view showing a fifteenth embodiment of the wheel bearing device according to the present invention. This embodiment is the same as the above-described first embodiment (FIG. 13). Basically, only the configuration of the hub wheel and wheel bearing is partially different. Other parts that have the same parts or the same function as the above-mentioned embodiment ■ Parts are assigned the same reference numerals and detailed description is omitted. To do.
[0082] この車輪用軸受装置は第 2世代と呼称される従動輪用であって、 ハブ輪 1 ' と、 このハブ輪 1 ' に固定された車輪用軸受 4 1 ' とを備えている。 車輪 用軸受 4 1 ' は、 外周に車体取付フランジ 4 cを一体に有し、 内周に複列の 外側転走面 1 7 a、 42 aが形成された外方部材 42と、 外周にこれら複列 の外側転走面 1 7 a、 42 aに対向する内側転走面 1 8 a、 43 aがそれぞ れ形成された 2つの内輪 1 8' 、 43' と、 両転走面 1 7 a、 1 8 aおよび 42 a, 43 a間に保持器 20、 44を介して転動自在に収容された複数の ポール 9および円錐ころ 1 0とを備えている。  This wheel bearing device is for a driven wheel called the second generation, and includes a hub wheel 1 ′ and a wheel bearing 4 1 ′ fixed to the hub wheel 1 ′. The wheel bearing 4 1 ′ has a body mounting flange 4 c integrally formed on the outer periphery, an outer member 42 having double row outer rolling surfaces 17 a and 42 a formed on the inner periphery, and these on the outer periphery. Double rolling outer rolling surfaces 1 7 a, 42 a Inner rolling surfaces facing 18 a, 43 a Two inner rings 1 8 ', 43' formed respectively, and both rolling surfaces 1 7 A plurality of poles 9 and tapered rollers 10 which are rotatably accommodated via cages 20 and 44 are provided between a, 18 a and 42 a, 43 a.
[0083] ハブ輪 1 ' は、 前述した第 1 3の実施形態におけるハブ輪 1に対して、 小 径段部 1 b' の外径が大径に形成されている。 また、 この小径段部 1 b' の 拡径に伴い、 内輪 1 8' 、 43' の肉厚が薄肉に形成されている。 これによ り、 車輪用軸受 4 1 ' の外径を大きくすることなくハブ輪 1 ' の小径段部 1 b' が拡径されているため、 装置の軽量■ コンパク ト化を図ると共に、 ハブ 輪 1 ' の強度■剛性を高めることができる。  In the hub wheel 1 ′, the outer diameter of the small-diameter step portion 1 b ′ is larger than that of the hub wheel 1 in the first to third embodiments described above. Further, the inner rings 18 ′ and 43 ′ are made thinner with the increase in diameter of the small diameter step 1b ′. As a result, the small diameter step 1 b ′ of the hub wheel 1 ′ is expanded without increasing the outer diameter of the wheel bearing 4 1 ′. The strength of the wheel 1 '■ The rigidity can be increased.
実施例 16  Example 16
[0084] 図 1 6は、 本発明に係る車輪用軸受装置の第 1 6の実施形態を示す縦断面 図である。 なお、 この実施形態は、 前述した第 1 4の実施形態 (図 1 4) と 基本的にはハブ輪と内輪の構成が一部異なるだけで、 その他前述した実施形 態と同一部品同一部位あるいは同一機能を有する部品■部位には同じ符号を 付して詳細な説明を省略する。  FIG. 16 is a longitudinal sectional view showing a sixteenth embodiment of the wheel bearing device according to the present invention. Note that this embodiment is basically the same as the above-described 14th embodiment (Fig. 14) except that the configuration of the hub ring and the inner ring is partially different. Parts having the same function ■ Parts are denoted by the same reference numerals and detailed description thereof is omitted.
[0085] この車輪用軸受装置は第 2世代と呼称される従動輪用であって、 外方部材 42と、 ハブ輪 22' 、 およびこのハブ輪 22' の小径段部 22 b' に圧入 された内輪 43' からなる内方部材 45' とを備えている。  This wheel bearing device is for a driven wheel called the second generation, and is press-fitted into the outer member 42, the hub wheel 22 ', and the small-diameter step portion 22b' of the hub wheel 22 '. And an inner member 45 'composed of an inner ring 43'.
[0086] ハブ輪 22' は、 前述した第 1 4の実施形態におけるハブ輪 22に対して 、 小径段部 22 b' の外径が大径に形成されている。 また、 この小径段部 2 2 b ' の拡径に伴い、 内輪 4 3 ' の肉厚が薄肉に形成されている。 これによ り、 外方部材 4 2の外径を大きくすることなくハブ輪 2 2 ' の小径段部 2 2 b ' が拡径されているため、 装置の軽量 . コンパク ト化を図ると共に、 ハブ 輪 2 2 ' の強度■剛性を高めることができる。 [0086] The hub wheel 22 'is formed such that the outer diameter of the small-diameter step portion 22b' is larger than the hub wheel 22 in the above-described 14th embodiment. This small diameter step 2 As the diameter of 2 b ′ increases, the inner ring 4 3 ′ becomes thinner. As a result, the diameter of the small diameter step 2 2 b ′ of the hub wheel 2 2 ′ is increased without increasing the outer diameter of the outer member 4 2, thereby reducing the weight of the device and making it compact. The strength of the hub wheel 2 2 ′ ■ The rigidity can be increased.
[0087] 以上、 本発明の実施の形態について説明を行ったが、 本発明はこうした実 施の形態に何等限定されるものではなく、 あくまで例示であって、 本発明の 要旨を逸脱しない範囲内において、 さらに種々なる形態で実施し得ることは 勿論のことであり、 本発明の範囲は、 特許請求の範囲の記載によって示され 、 さらに特許請求の範囲に記載の均等の意味、 および範囲内のすべての変更 を含む。 The embodiment of the present invention has been described above. However, the present invention is not limited to such an embodiment, and is merely an example and within the scope not departing from the gist of the present invention. Of course, the present invention can be implemented in various forms, and the scope of the present invention is indicated by the description of the scope of claims, and further, the equivalent meanings described in the scope of claims, Includes all changes.
産業上の利用可能性  Industrial applicability
[0088] 本発明に係る車輪用軸受装置は、 駆動輪用、 従動輪用に拘わらず、 第 2ま たは第 3世代構造の車輪用軸受装置に適用することができる。  [0088] The wheel bearing device according to the present invention can be applied to a wheel bearing device having a second or third generation structure regardless of whether it is for a driving wheel or a driven wheel.
図面の簡単な説明  Brief Description of Drawings
[0089] [図 1 ]本発明に係る車輪用軸受装置の第 1の実施形態を示す縦断面図である。  FIG. 1 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention.
[図 2]本発明に係る車輪用軸受装置の第 2の実施形態を示す縦断面図である。  FIG. 2 is a longitudinal sectional view showing a second embodiment of the wheel bearing device according to the present invention.
[図 3]本発明に係る車輪用軸受装置の第 3の実施形態を示す縦断面図である。  FIG. 3 is a longitudinal sectional view showing a third embodiment of a wheel bearing device according to the present invention.
[図 4]本発明に係る車輪用軸受装置の第 4の実施形態を示す縦断面図である。  FIG. 4 is a longitudinal sectional view showing a fourth embodiment of a wheel bearing device according to the present invention.
[図 5]本発明に係る車輪用軸受装置の第 5の実施形態を示す縦断面図である。  FIG. 5 is a longitudinal sectional view showing a fifth embodiment of the wheel bearing device according to the invention.
[図 6]本発明に係る車輪用軸受装置の第 6の実施形態を示す縦断面図である。  FIG. 6 is a longitudinal sectional view showing a sixth embodiment of the wheel bearing device according to the invention.
[図 7]本発明に係る車輪用軸受装置の第 7の実施形態を示す縦断面図である。  FIG. 7 is a longitudinal sectional view showing a seventh embodiment of the wheel bearing device according to the invention.
[図 8]本発明に係る車輪用軸受装置の第 8の実施形態を示す縦断面図である。  FIG. 8 is a longitudinal sectional view showing an eighth embodiment of the wheel bearing device according to the invention.
[図 9]本発明に係る車輪用軸受装置の第 9の実施形態を示す縦断面図である。  FIG. 9 is a longitudinal sectional view showing a ninth embodiment of the wheel bearing device according to the invention.
[図 10]本発明に係る車輪用軸受装置の第 1 0の実施形態を示す縦断面図であ る。  FIG. 10 is a longitudinal sectional view showing a tenth embodiment of the wheel bearing device according to the present invention.
[図 1 1 ]本発明に係る車輪用軸受装置の第 1 1の実施形態を示す縦断面図であ る。  FIG. 11 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention.
[図 12]本発明に係る車輪用軸受装置の第 1 2の実施形態を示す縦断面図であ る。 FIG. 12 is a longitudinal sectional view showing a first embodiment of a wheel bearing device according to the present invention. The
[図 13]本発明に係る車輪用軸受装置の第 1 3の実施形態を示す縦断面図であ る。  FIG. 13 is a longitudinal sectional view showing a thirteenth embodiment of a wheel bearing device according to the present invention.
[図 14]本発明に係る車輪用軸受装置の第 1 4の実施形態を示す縦断面図であ る。  FIG. 14 is a longitudinal sectional view showing a 14th embodiment of a wheel bearing device according to the present invention.
[図 15]本発明に係る車輪用軸受装置の第 1 5の実施形態を示す縦断面図であ る。  FIG. 15 is a longitudinal sectional view showing a fifteenth embodiment of a wheel bearing device according to the present invention.
[図 16]本発明に係る車輪用軸受装置の第 1 6の実施形態を示す縦断面図であ る。  FIG. 16 is a longitudinal sectional view showing a sixteenth embodiment of a wheel bearing device according to the present invention.
[図 17]従来の車輪用軸受装置を示す縦断面図である。  FIG. 17 is a longitudinal sectional view showing a conventional wheel bearing device.
[図 18]従来の他の車輪用軸受装置を示す縦断面図である。 FIG. 18 is a longitudinal sectional view showing another conventional wheel bearing device.
符号の説明 Explanation of symbols
1、 1 ' 、 1 3、 1 3' 、 22、 22' ハ ブ輪 1, 1 ', 1 3, 1 3', 22, 22 'hub
1 a M咅 |5 1 a M 咅 | 5
1 b、 1 b' 、 1 3 b、 1 3 b' 、 22 b、 22 b' 小径 段部 1 b, 1 b ', 1 3 b, 1 3 b', 22 b, 22 b 'Small diameter step
1 c 據 部  1 c
2、 1 6、 24、 30、 35、 35' 、 4 1、 4 1 ' 車 輪用軸受  2, 1 6, 24, 30, 35, 35 ', 4 1, 4 1' Wheel bearing
3 单輪 取付フランジ  3 Single wheel Mounting flange
3 a ハブ ポルト  3 a hub porto
3 b シ_ ルランド部  3 b
4、 1 7、 25、 3 1、 36、 42 外方 部材 4, 1 7, 25, 3 1, 36, 42 Outside Element
4 a、 4 b、 1 7 a、 1 7 b、 25 a、 3 1 a、 36 a、 42 a - ■ ■外側 転走面  4 a, 4 b, 1 7 a, 1 7 b, 25 a, 3 1 a, 36 a, 42 a-■ Outer rolling surface
4 c 車体 取付フランジ  4 c Body mounting flange
5、 5' 、 6、 1 8、 1 8' 、 1 9、 26、 32、 37、 37' 、 43、 4 3, ■ ■ ■ ■内輪  5, 5 ', 6, 1 8, 1 8', 1 9, 26, 32, 37, 37 ', 43, 4 3, ■ ■ ■ ■ Inner ring
5 a 6 a、 1 3 a、 1 8 a、 1 9 a、 22 a、 26 a、 32 a、 37 a、 43 a - ■ ■内側転走面  5 a 6 a, 1 3 a, 1 8 a, 19 a, 22 a, 26 a, 32 a, 37 a, 43 a-■ Inner rolling surface
6 b、 1 8 b 大鍔 6 b, 1 8 b
6 c、 1 8 c 小鍔6 c, 1 8 c Gavel
7、 8、 20、 2 1、 27、 33、 38、 44 保持 器 ル 7, 8, 20, 2 1, 27, 33, 38, 44 Cage
1 0 RH ころ  1 0 RH
1 1、 1 2、 1 5、 28、 39 シ一 ル  1 1, 1 2, 1 5, 28, 39
1 4、 23、 29、 34、 40、 40' 、 45、 45' 内 方部材  1 4, 23, 29, 34, 40, 40 ', 45, 45' inner member
50、 64 ハブ 車 m  50, 64 hub car m
50 a、 57 a、 64 a、 65 a 内側 転走面  50 a, 57 a, 64 a, 65 a Inner rolling surface
50 b、 63 車輪 取付フランジ  50 b, 63 wheels Mounting flange
5 1 等速 外方 外側 車体 内方 ポー 円錐 内輪 外側 卜ラ マウ 肩部 止め 小径 加締 部 5 1 Constant speed Outside Outside Car body Inside Pole Cone Inner ring Outside 卜 La Mau Shoulder stop Small diameter Caulking Part
69, 70 保持 器  69, 70 Cage
7 1、 72 シ一 ル  7 1, 72 seals
D 外方部材のインナ 一側の外径  D Outer member inner One side outer diameter
D 1 アウター側のポールのピ ツチ円直径  D 1 Pitch circle diameter of outer pole
D 2 ィンナ一側のポールのピ ツチ円直径  D 2 Inner side pole pitch circle diameter
PCD i ィンナ一側の転動体のピ ツチ円直径  Pitch circle diameter of rolling element on one side of PCD i
PCDo ァウタ一側の転動体のピ ツチ円直径  Pitch circle diameter of rolling element on one side of PCDo

Claims

請求の範囲 The scope of the claims
[ 1 ] 外周にナックルに取り付けられるための車体取付フランジを一体に有し、 内周に複列の外側転走面が形成された外方部材と、  [1] An outer member integrally having a vehicle body mounting flange to be attached to the knuckle on the outer periphery, and having a double row outer rolling surface formed on the inner periphery;
—端部に車輪を取り付けるための車輪取付フランジを一体に有し、 外周に 小径段部が形成されたハブ輪、 およびこのハブ輪の小径段部に圧入され、 外 周に前記複列の外側転走面に対向する内側転走面が形成された少なくとも一 つの内輪からなる内方部材と、  -Hub wheel with a wheel mounting flange for mounting the wheel at the end, with a small diameter step formed on the outer periphery, and press-fitted into the small diameter step of this hub wheel, and the outer periphery of the double row on the outer periphery An inner member composed of at least one inner ring formed with an inner rolling surface facing the rolling surface;
この内方部材と前記外方部材の両転走面間に転動自在に収容された複列の 転動体列とを備えた車輪用軸受装置において、  In the wheel bearing device comprising the inner member and a double row rolling element row accommodated so as to roll between both rolling surfaces of the outer member,
前記複列の転動体列のうち一方の転動体列がポールで構成され、 他方の転 動体列が円錐ころで構成されると共に、 前記ポール列のポール個数が前記円 錐ころ列のころ個数よりも多く設定されていることを特徴とする車輪用軸受 装置。  Of the double row rolling element rows, one rolling element row is constituted by poles, the other rolling element row is constituted by tapered rollers, and the number of poles in the pole row is determined by the number of rollers in the tapered roller row. A large number of wheel bearing devices are also set.
[2] 前記複列の転動体列のうちァウタ一側の転動体列のピッチ円直径がィンナ 一側の転動体列のピッチ円直径よりも大径に設定されている請求項 1に記載 の車輪用軸受装置。  [2] The pitch circle diameter of the rolling element row on one side of the double row rolling element row is set to be larger than the pitch circle diameter of the rolling element row on the inner side. Wheel bearing device.
[3] 前記複列の転動体列のうちインナ一側の転動体列のピッチ円直径がァウタ 一側の転動体列のピッチ円直径よりも大径に設定されている請求項 1に記載 の車輪用軸受装置。  [3] The pitch circle diameter of the inner one rolling element row of the double row rolling element row is set larger than the pitch circle diameter of the outer one rolling element row. Wheel bearing device.
[4] 前記小径段部の端部を径方向外方に塑性変形させて形成した加締部により 前記内輪が軸方向に固定されている請求項 1乃至 3いずれかに記載の車輪用 軸受装置。  4. The wheel bearing device according to any one of claims 1 to 3, wherein the inner ring is fixed in the axial direction by a crimping portion formed by plastically deforming an end portion of the small-diameter stepped portion radially outward. .
[5] 前記ハブ輪の小径段部に一対の内輪が圧入され、 これらの内輪の内径が同 —に設定されている請求項 1乃至 4いずれかに記載の車輪用軸受装置。  5. The wheel bearing device according to any one of claims 1 to 4, wherein a pair of inner rings are press-fitted into the small-diameter step portion of the hub ring, and the inner diameters of these inner rings are set to be the same.
[6] 前記ハブ輪の外周にアウター側の内側転走面が直接形成されると共に、 こ の内側転走面からインナ一側に前記小径段部が形成され、 この小径段部に所 定のシメシロを介して前記ィンナー側の内輪が圧入されている請求項 1乃至 4いずれかに記載の車輪用軸受装置。  [6] The outer rolling inner rolling surface is directly formed on the outer periphery of the hub wheel, and the small diameter step is formed on the inner side from the inner rolling surface. The wheel bearing device according to any one of claims 1 to 4, wherein the inner ring on the inner side is press-fitted through a shimeshiro.
PCT/JP2007/001121 2006-10-17 2007-10-16 Bearing device for wheel WO2008047472A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2006282760A JP2008101650A (en) 2006-10-17 2006-10-17 Wheel bearing device
JP2006-282760 2006-10-17
JP2006-282761 2006-10-17
JP2006282761A JP2008101651A (en) 2006-10-17 2006-10-17 Wheel bearing device

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
WO2014109331A1 (en) * 2013-01-09 2014-07-17 Ntn株式会社 Bearing device for wheel

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Publication number Priority date Publication date Assignee Title
JP2004090732A (en) * 2002-08-30 2004-03-25 Ntn Corp Bearing device of driving wheel
JP2004108449A (en) * 2002-09-17 2004-04-08 Koyo Seiko Co Ltd Rolling bearing device
JP2004345439A (en) * 2003-05-21 2004-12-09 Honda Motor Co Ltd Wheel supporting hub unit
US20050111771A1 (en) * 2003-10-14 2005-05-26 Shevket Cengiz R. Asymmetric hub assembly

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Publication number Priority date Publication date Assignee Title
JP2004090732A (en) * 2002-08-30 2004-03-25 Ntn Corp Bearing device of driving wheel
JP2004108449A (en) * 2002-09-17 2004-04-08 Koyo Seiko Co Ltd Rolling bearing device
JP2004345439A (en) * 2003-05-21 2004-12-09 Honda Motor Co Ltd Wheel supporting hub unit
US20050111771A1 (en) * 2003-10-14 2005-05-26 Shevket Cengiz R. Asymmetric hub assembly

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Publication number Priority date Publication date Assignee Title
WO2014109331A1 (en) * 2013-01-09 2014-07-17 Ntn株式会社 Bearing device for wheel
JP2014134231A (en) * 2013-01-09 2014-07-24 Ntn Corp Bearing device for wheel
CN104903603A (en) * 2013-01-09 2015-09-09 Ntn株式会社 Bearing device for wheel

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