US20060179656A1 - Method for assembling rolling bearing device - Google Patents

Method for assembling rolling bearing device Download PDF

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Publication number
US20060179656A1
US20060179656A1 US10/544,675 US54467505A US2006179656A1 US 20060179656 A1 US20060179656 A1 US 20060179656A1 US 54467505 A US54467505 A US 54467505A US 2006179656 A1 US2006179656 A1 US 2006179656A1
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United States
Prior art keywords
cage
tapered rollers
row tapered
raceway
sub
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
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US10/544,675
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English (en)
Inventor
Nobuyuki Seo
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JTEKT Corp
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Individual
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Assigned to KOYO SEIKO CO., LTD. reassignment KOYO SEIKO CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SEO, NOBUYUKI
Publication of US20060179656A1 publication Critical patent/US20060179656A1/en
Assigned to JTEKT CORPORATION reassignment JTEKT CORPORATION CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: KOYO SEIKO CO., LTD.
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F16C43/06—Placing rolling bodies in cages or bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
    • B60B35/12—Torque-transmitting axles
    • B60B35/18—Arrangement of bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
    • F16C33/4623—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
    • F16C33/4635—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/48—Cages for rollers or needles for multiple rows of rollers or needles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49643—Rotary bearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49643—Rotary bearing
    • Y10T29/49647—Plain bearing
    • Y10T29/49648—Self-adjusting or self-aligning, including ball and socket type, bearing and component making
    • Y10T29/49657—Socket making
    • Y10T29/49663—Socket making by assembling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49636—Process for making bearing or component thereof
    • Y10T29/49643—Rotary bearing
    • Y10T29/49679—Anti-friction bearing or component thereof
    • Y10T29/4968—Assembling of race, cage, and rolling anti-friction members

Definitions

  • the present invention relates to an assembling method for double-row tapered-roller bearing assembly.
  • FIG. 6 is a sectional view of the double-row tapered-roller bearing assembly conventionally used widely in the art (Conventional Example 1).
  • the conventional example 1 includes: a single outer ring 1 having two outer raceways 2 , 2 ; a pair of inner rings 4 , 4 having inner raceways 3 , 3 ; and plural tapered rollers 5 , 5 rollably interposed between the outer raceways and the inner raceways.
  • the conically recessed outer raceways 2 , 2 are formed on an inner peripheral surface of the outer ring 1 .
  • outer raceways 2 , 2 are disposed in opposed relation so that an inside diameter of the outer ring 1 is progressively decreased from either end thereof toward the center thereof.
  • the inner rings 4 , 4 are individually formed with the conically protruded inner raceways 3 , 3 in correspondence to the respective outer raceways 2 , 2 .
  • the tapered rollers 5 , 5 are clamped between the inner rings 4 , 4 and the outer ring 1 as interposed between the inner raceways 3 , 3 and the outer raceways 2 , 2 and are arranged as regularly spaced by means of a cage 6 .
  • Seal rings 7 , 7 are disposed between the opposite ends of the inner peripheral surface of the outer ring 1 and a respective end of outer peripheral surfaces of the inner rings 4 , 4 .
  • the seal rings 7 , 7 are disposed for the purposes of hermetically sealing space between the outer ring 1 and the inner rings 4 , 4 thereby preventing the invasion of external foreign substances (dusts, water, metal powder and the like) and the leakage of lubricant.
  • the aforementioned double-row tapered-roller bearing assembly of the conventional example 1 is assembled as follows. First, as shown in FIG. 7 , sub-assemble members 11 each combining the cage 6 with the tapered rollers 5 are assembled to the inner ring 4 . The resultant inner rings are inserted into the inner periphery of the outer ring 1 so as to mate the tapered rollers 5 with the outer raceways 2 , 2 and the inner raceways 3 . 3 , as shown in FIG. 8 . Finally, the seal rings 7 , 7 are fitted in the respective spaces between the opposite ends of the inner peripheral surface of the outer ring 1 and the respective ends of the outer peripheral surfaces of the inner rings 4 , 4 .
  • the cage 6 substantially defines a truncated conical surface including: a greater ring 6 a and a smaller ring 6 b as a pair of ring members in spaced relation; a plurality of ridges 6 c bridged between these ring members; and an annular rib 6 d extended radially inwardly from a radial inside end of the smaller ring 6 b .
  • a trapezoidal window pocket 10 for accommodating the tapered roller 5 is defined between a respective pair of adjoining ridges 6 c such that the plural trapezoidal pockets are arranged with equal spacing.
  • FIG. 10 is a sectional view showing the sub-assemble member 11 with the tapered rollers 5 accommodated in the pockets 10 .
  • FIG. 11 is a sectional view of the ridges 6 c of the cage 6 taken on the plane perpendicular to a longitudinal direction of the ridges.
  • the tapered rollers 5 disposed as described above, are depicted with the phantom lines.
  • a circumferential width W 10 of the pocket or the space between each pair of adjoining ridges 6 c is smaller than a diameter of the tapered roller 5 as determined at each place on a generatrix of the tapered rollers 5 .
  • the tapered rollers 5 are held in posture as sunk into the respective pockets of the cage 6 .
  • the cage 6 merely supports the tapered rollers 5 on diametrical outer sides thereof. Hence, the tapered rollers 5 never drop from the sub-assemble member 11 diametrically outwardly thereof. Depending upon some posture of the sub-assemble member 11 , however, the tapered roller 5 may incline diametrically inwardly to drop off from the sub-assemble member 11 .
  • a cage having the structure detrimentally allowing the disposed tapered rollers to drop diametrically inwardly, as exemplified by this cage 6 has high general-purpose versatility but also has a drawback that the tapered rollers are apt to drop off.
  • the drop-off of the tapered rollers 5 is not encountered during the assembling steps. This is because the sub-assemble member 11 can be handled in a state where the sub-assemble member 11 is assembled with the inner rings 4 , as shown in FIG. 7 . That is, the tapered rollers 5 in the state of FIG. 7 are clamped between the inner rings 4 and the cage 6 so that the tapered rollers are retained as prevented from dropping off.
  • FIG. 12 illustrates an example of a conventionally known structure of the hub unit (Conventional Example 2).
  • this hub unit is constructed such that one end of a hub body 16 is formed with a flange 26 for supporting a road wheel, that an outer peripheral surface of an intermediate portion of the hub body 16 is formed with a first inner raceway 28 constituting a first-row tapered-roller bearing, and that the other end of the hub body 16 is adapted to allow an inner ring 35 having a second inner raceway 36 to be fitted on an outer periphery thereof.
  • the first seal ring 15 is mounted to place. Subsequently, the hub body 16 is inserted into the outer ring 13 . In the case of the structure of the conventional example 2, it is impossible to handle the sub-assemble member 19 in a state where the sub-assemble member is assembled with the hub body 16 defining the inner ring.
  • Another reason for taking the method (2) is as follows.
  • the inner ring 35 is press-fitted on the hub body 16 .
  • the hub body 16 is placed on a jig as upstanding on its side formed with the flange 26 .
  • the hub body may be subjected to this step in an as-is state, so that the operation efficiency is increased.
  • the methods (1) and (2) cannot obviate the drop-off of the first-row tapered rollers 18 a.
  • the conventional example 2 devises the structure of the first cage 17 which is designed as an anti-drop cage.
  • the tapered rollers 18 a are retained by the first cage 17 so as to be prevented from dropping diametrically inwardly.
  • FIG. 13 is a sectional view showing ridges 17 c of the first cage 17 of the conventional example 2.
  • the tapered rollers 18 a so retained are depicted with the phantom lines. Referring to FIG.
  • the tapered roller 18 a is so retained as not to drop diametrically inwardly (see, for example, Japanese Unexamined Patent Publication No. 2000-65049).
  • the anti-drop cage as illustrated by the first cage 17 of the aforementioned conventional example 2 does not have the general-purpose versatility and hence, an enormous cost is required for fabricating the cage.
  • the cage of the structure allowing the rollers to drop diametrically inwardly as exemplified by the cage 6 of the conventional example 1, has the general-purpose versatility so as to be fabricated on a mass-production basis.
  • the cage has an advantage of low fabrication cost.
  • the cage cannot obviate the aforementioned problem associated with the drop-off of the tapered rollers. The problem may be encountered during the steps prior to the insertion of the hub body into the outer ring.
  • an assembling method for a double-row tapered-roller bearing assembly comprising: an outer ring including a first outer raceway and a second outer raceway formed on an inner peripheral surface thereof; a hub body including a first inner raceway in opposing relation with the first outer raceway and formed with a flange projecting diametrically outwardly from one end thereof; an inner ring including a second inner raceway in opposing relation with the second outer raceway and fixedly fitted on an outer periphery of the other end of the hub body; a plurality of first-row tapered rollers interposed between the first inner raceway and the first outer raceway; a first cage allowing the first-row tapered rollers to be arranged thereon at regular space intervals; and a first seal ring mounted to the inner peripheral surface of the outer ring at its end close to the first outer raceway, the method comprising: a first step of forming a first step member by combining a sub-assemble
  • the double-row tapered-roller bearing assembly including the flange at the hub body may be fabricated without using the costly cage having no general-purpose versatility.
  • the cage having the general-purpose versatility is constructed to allow the tapered rollers to drop radially inwardly, the tapered rollers are prevented from inclining radially inwardly by supporting the tapered rollers on the cage horizontally positioned, as described above.
  • the drop-off of the tapered rollers is obviated so that the bearing assembly may be fabricated using the cage having the general-purpose versatility.
  • the double-row tapered-roller bearing assembly including the hub body formed with the flange can be fabricated without using the costly cage having poor general-purpose versatility but by exclusively using the cage featuring the high general-purpose versatility.
  • FIG. 1 is a sectional view showing an example of a roller bearing assembly fabricated according to the invention
  • FIG. 2 is a sectional view showing a first step member according to one embodiment of the invention.
  • FIG. 3 is a sectional view showing a second step member fabricated according to the one embodiment of the invention.
  • FIG. 4 is a sectional view showing a third step member fabricated according to the one embodiment of the invention.
  • FIG. 5 is an enlarged sectional view showing a sub-assemble member according to the one embodiment of the invention.
  • FIG. 6 is a sectional view showing a double-row tapered-roller bearing assembly according to Conventional Example 1;
  • FIG. 7 is a sectional view showing an assembling method for the double-row tapered-roller bearing assembly of Conventional Example 1;
  • FIG. 8 is a sectional view showing the assembling method for the double-row tapered-roller bearing assembly of Conventional Example 1;
  • FIG. 9 is a perspective view showing a cage according to Conventional Example 1 and the one embodiment of the invention.
  • FIG. 10 is a sectional view showing the sub-assemble member according to Conventional Example 1 and the one embodiment of the invention.
  • FIG. 11 is a sectional view showing ridges of the cage according to Conventional Example 1 and the one embodiment of the invention.
  • FIG. 12 is a sectional view showing a double-row tapered-roller bearing assembly according to Conventional Example 2.
  • FIG. 13 is a sectional view showing ridges of a first cage of the double-row tapered-roller bearing assembly according to Conventional Example 2.
  • a structure of a bearing assembly according to one embodiment of the invention is the same per se as that of the conventional example 2, except for the structure of the first cage 17 . Accordingly, description on components of the embodiment which are common to the conventional example 2 described above is dispensed with. Furthermore, those components represented by the same reference characters as those of the conventional example 2 are constructed the same way as in the conventional example 2.
  • FIG. 1 is a sectional view showing one example of a roller bearing assembly obtained by applying the invention.
  • the roller bearing assembly illustrates an automotive hub unit 50 for supporting a drive road wheel.
  • a difference between FIG. 1 and FIG. 12 showing the conventional example 2 only consists in a first cage 25 shown in FIG. 1 .
  • the first cage 25 is similar to the cage of the conventional example 1 shown in FIG. 9 and has high general-purpose versatility. As shown in FIG.
  • the first cage 25 defines the truncated conical surface including: the greater ring 6 a defining the greater diameter of a pair of ring members in spaced relation; the smaller ring 6 b defining the smaller diameter; a plurality of ridges 6 c bridged between these ring members; and the annular rib 6 d extended radially inwardly from the radial inside end of the smaller ring 6 b .
  • Such a structure defines a plurality of trapezoidal window pockets 10 between respective pairs of adjoining ridges 6 c , the pockets accommodating the tapered rollers 5 respectively and arranged with equal spacing.
  • FIG. 10 is a sectional view showing a sub-assemble member 20 wherein the first-row tapered rollers 18 a are placed in the pockets 10 .
  • the first-row tapered rollers 18 a are disposed in a manner to sink into the respective pockets 10 from the diametrical inner side of the first cage 25 .
  • FIG. 11 is a sectional view showing the ridges 6 c of the first cage 25 as taken on the plane orthogonal to the longitudinal direction thereof. The figure depicts the first-row tapered rollers 18 a so disposed with the phantom lines.
  • the space between adjoining ridges 6 c or the circumferential width of the pocket is smaller than the diameter of each tapered roller 18 a as determined at each place on the generatrix of the first-row tapered rollers 18 a .
  • the tapered rollers 18 a are held in position as sunk into the respective pockets of the first cage 25 .
  • the cage 6 merely supports the tapered rollers 5 on diametrical outer sides thereof. Therefore, the first-row tapered rollers 18 a never drop from the sub-assemble member 20 diametrically outwardly thereof.
  • the first-row tapered roller 18 a may incline diametrically inwardly of the sub-assemble member so as to drop off therefrom.
  • the sub-assemble member 20 differs from the sub-assemble member 19 of the conventional example 2, which is adapted to prevent the tapered rollers from dropping diametrically inwardly.
  • the outer ring 13 includes the first outer raceway 22 and the second raceway 23 on the inner peripheral surface thereof, which are each defined by a conically recessed surface.
  • the first outer raceway 22 and the second outer raceway 23 are disposed in the opposite directions and in a manner to present the smaller diameter sides of the conically recessed surfaces thereof in end-to-end relation.
  • the first outer raceway 22 and the second outer raceway 23 are inclined in the opposite directions relative to each other.
  • these outer raceways are so inclined as to progressively increase the inside diameter of the outer ring 13 from the center thereof toward the respective ends thereof.
  • the outer ring 13 is further formed with a fixture portion 27 for fixing the outer ring 13 to a suspension device and the like (not shown), the fixture portion projecting outwardly from an intermediate portion of an outer peripheral surface of the ring.
  • the hub body 16 includes the flange 26 projecting diametrically outwardly from one end thereof.
  • the flange 26 serves to support the road wheel.
  • the hub body 16 is formed with the first inner raceway 28 at an intermediate portion thereof, the inner raceway defined by a conically protruded surface.
  • the first inner raceway 28 is so inclined as to progressively decrease the diameter of the hub body 16 from the one end (the side formed with the flange 26 ) toward the other end thereof.
  • a step-like greater jaw 29 is formed at an edge of the inner raceway 28 (on the one-end-side of the hub body) such as to decrease the diameter of the hub body 16 at the corresponding portion of the inner raceway 28 , whereas the other edge of the inner raceway 28 (on the other-end-side of the hub body) is free from a step-like smaller jaw for decreasing the diameter of the hub body 16 at the corresponding portion of the inner raceway 28 .
  • the hub body 16 includes a smaller-diameter cylindrical surface portion 30 at the other end thereof (the end opposite to the end where the flange 26 is formed).
  • the smaller-diameter cylindrical surface portion 30 has a smaller diameter than the first inner raceway 28 and defines a cylindrical surface concentric with the hub body 16 .
  • the hub body 16 is centrally formed with a spline hole 37 for spline engagement with an end of an automotive drive shaft (not shown).
  • the inner ring 35 is fixed to the hub body 16 as fitted on an outer periphery of the smaller-diameter cylindrical surface portion 30 formed at the other end of the hub body 16 .
  • An outer periphery of the inner ring 35 is formed with the second inner raceway 36 inclined in a direction to oppose the second outer raceway 23 .
  • the inner ring 35 is fixedly fitted on the smaller-diameter cylindrical surface portion 30 , as positioned to abut against a step face 38 of the smaller-diameter cylindrical surface portion 30 of the hub body 16 at one end thereof (the end close to the flange 26 ).
  • the first inner raceway 28 and the first outer raceway 22 oppose each other, while a plurality of first-row tapered rollers 18 a are interposed between these raceways. These first-row tapered rollers 18 a are arranged with equal spacing by means of the first cage 25 .
  • the first cage 25 has the same structure as the cage 6 of the conventional example 1.
  • the second inner raceway 36 and the second outer raceway 23 oppose each other, while a plurality of second-row tapered rollers 18 b are interposed between these raceways.
  • These second-row tapered rollers 18 b are arranged with equal spacing by means of a second cage 31 .
  • the second cage 31 is identical with the first cage 25 , thus having the same structure as the cage 6 of the conventional example 1.
  • the opposite ends of the inner peripheral surface of the outer ring 13 are provided with the first seal ring 15 and a second seal ring 14 , respectively.
  • the first seal ring 15 is disposed on the inner peripheral surface of the outer ring 13 at its end close to the first outer raceway 22 , so as to seal a space between the inner peripheral surface of the outer ring 13 at its end close to the first outer raceway 22 and the outer peripheral surface of the hub body 16 at place opposite the above end.
  • the second seal ring 14 is disposed on the inner peripheral surface of the outer ring 13 at its end close to the second outer raceway 23 , so as to seal a space between the inner peripheral surface of the outer ring 13 at its end close to the second outer raceway 23 and the outer peripheral surface of the inner ring 35 at place opposite the above end.
  • the method of assembling the roller bearing assembly having the structure of FIG. 1 is as follows. First, the sub-assemble member 20 combining the first cage 25 with the first-row tapered rollers 18 a is fabricated.
  • the sub-assemble member 20 is of the same structure as the sub-assemble member 11 of the conventional example 1 shown in FIG. 10 .
  • a first step of the assembling method according to the embodiment is to combine this sub-assemble member 20 with the outer ring 13 .
  • a first step member 60 combining the sub-assemble member 20 with the outer ring 13 is obtained, as shown in FIG. 2 .
  • the sub-assemble member 20 is set on the first outer raceway 22 of the outer ring 13 .
  • the sub-assemble member 20 is substantially maintained in a horizontal posture such as to prevent all the tapered rollers or all the first-row tapered rollers 18 a from dropping off.
  • the sub-assemble member 20 is maintained in the posture in which the first cage 25 constituting the sub-assemble member 20 and defining the substantially conical surface is substantially placed horizontally with its wider opening side of the substantially conical surface positioned upwardly.
  • the sub-assemble member 20 is maintained in the posture in which the greater ring 6 a defining the greater diameter of the first cage 25 constituting the sub-assemble member 20 is positioned upwardly relative to the smaller ring 6 b defining the smaller diameter of the first cage 25 and which a plane contacting the greater ring 6 a is oriented substantially horizontally.
  • the substantially horizontal posture of the sub-assemble member 20 preventing the drop-off of the all of the first-row tapered rollers 18 a is specifically described as below. That is, the first cage 25 is horizontally supported while the greater ring 6 a defining the greater diameter thereof is positioned upwardly relative to the smaller ring 6 b defining the smaller diameter of the first cage 25 . Furthermore, the sub-assemble member 20 has its axis (axis about which the roller bearing assembly rotates) is oriented vertically. In addition, all the first-row tapered rollers 18 a have their centroids G located radially outwardly with respect to the radially innermost support points P to be described hereinlater.
  • the posture of the sub-assemble member is defined such that the axis of the sub-assemble member is oriented vertically and that a distance ⁇ is smaller than a distance ⁇ (to be described hereinlater) with respect to every one of the first-row tapered rollers 18 a .
  • the radially innermost support point P, the distance ⁇ and the distance y are described as below.
  • FIG. 5 is an enlarged sectional view of the sub-assemble member 20 .
  • the line A indicates the vertical direction whereas the upper arrow indicates the vertically upward direction.
  • the axis of the sub-assemble member 20 substantially coincides with the vertical line.
  • the smaller ring 6 b of the first cage 25 and the first-row tapered roller 18 a have contact portions at which the smaller ring and the tapered roller are in face-to-face contact, line-to-line contact and point-to-point contact. Of the contact portions, a point located most radially inwardly and vertically downwardly with respect to the centroid G of the first-row tapered roller 18 a is the radially innermost support point P.
  • the first cage 25 of the sub-assemble member 20 is not constructed to restrain the first-row tapered rollers 18 a from inclining radially inwardly.
  • the first-row tapered rollers 18 a are allowed to incline radially inwardly. Accordingly, in a case where the centroid G is located radially outwardly with respect to the radially innermost support point P or where the distance ⁇ between the point P and a vertical line Z passing through the center of the smaller ring 6 b is smaller than the distance ⁇ between the point G and the vertical line Z ( ⁇ ), the first-row tapered rollers 18 a are never inclined radially inwardly to drop off.
  • the first-row tapered rollers 18 a may be inclined radially inwardly to drop off. If all the first-row tapered rollers 18 a are adapted to have their centroids G located radially outwardly with respect to the radially innermost support points P, the first-row tapered rollers 18 a are restrained from inclining radially inwardly to drop off.
  • a value given by dividing the thickness W 2 of a bottom face of the pocket 10 (the thickness of the smaller ring 6 b ) by the radius R of a smaller bottom of the first-row tapered roller 18 a is in the range of 0.4 or more and 0.7 or less. Therefore, the cage having the above value in this range features a particularly high general-purpose versatility, accomplishing even further cost reduction.
  • a second step of the assembling method according to the embodiment is to mount the first seal ring 15 to the aforesaid first step member 60 .
  • the seal ring 15 is fixedly fitted in the inner periphery of the outer ring 13 at its end close to the first outer raceway 22 .
  • This step provides a second step member 70 as shown in FIG. 3 .
  • the sub-assemble member 20 is maintained in the same posture as in the aforementioned first step. Therefore, the first-row tapered rollers 18 a in the sub-assemble member 20 are prevented from inclining diametrically inwardly to drop off.
  • a third step of the assembling method according to the embodiment is to combine the above second step member 70 with the hub body 16 .
  • the hub body 16 is inserted into the second step member 70 so as to be combined therewith.
  • the hub 16 is positioned to posture its one end formed with the flange 26 upwardly relative to its other end formed with the smaller-diameter cylindrical surface portion 30 .
  • the second step member 70 is maintained such that the sub-assemble member 20 is in the same posture as in the first step and the second step.
  • the other end of the hub 16 is inserted into the outer ring 13 through its end provided with the first seal ring 15 .
  • the hub 16 and the second step member 70 are combined together as maintained in such postures, the first-row tapered rollers 18 a in the sub-assemble member 20 are prevented from inclining diametrically inwardly to drop off, just as in the aforementioned first step and second step.
  • a fourth step is performed to insert an inner ring member 80 into the outer ring 13 through its (upper) side opposite the smaller-diameter cylindrical surface portion 30 thereby fixedly fitting the inner ring 35 on the smaller-diameter cylindrical surface portion 30 of the hub body 16 , the inner ring member 80 having the second-row tapered rollers 18 b disposed in the individual pockets of the second cage 31 and clamped between the inner ring 35 and the second cage 31 (see FIG. 1 ).
  • this step there is no fear of the drop-off of the first-row tapered rollers 18 a , which are clamped between the first outer raceway 22 and the first inner raceway 28 .
  • the second-row tapered rollers 18 b may be handled as integrally combined with the inner ring 35 and the second cage 31 .
  • the second-row tapered rollers are clamped between the second cage 31 and the second inner raceway 36 , thus involving no fear of drop-off. This negates the need for considering the postures of the individual members for the sake of obviating the drop-off of the tapered rollers.
  • the insertion of the inner ring member 80 may be facilitated as follows. That is, the third step member fabricated in the third step (see FIG.
  • the hub body 16 may attain a sufficient contact surface with a jig (receiving jig) supporting the hub body 16 on the one end thereof particularly when the inner ring 35 is press-fitted on the smaller-diameter cylindrical surface portion 30 of the hub body 16 from above.
  • the hub body 16 is stably supported so that the press-fitting operation may be carried out positively.
  • the second seal ring 14 is mounted to place between the end of the outer peripheral surface of the inner ring 35 and the end of the inner peripheral surface of the outer ring (see FIG. 1 ).
  • the roller bearing assembly may be fabricated without using the costly cage having poor general-purpose versatility but by exclusively using the cage featuring the high general-purpose versatility.
  • a resin cage is constructed such that a bottom face of the pocket 10 has a greater thickness W 2 (see FIG. 5 ) than a thickness W 1 of the annular rib, whereas a metal cage is constructed such that the width W 2 of the ridge is equal to the thickness W 1 of the annular rib. Accordingly, the cage satisfying such conditions may accomplish the cost reduction more favorably.
  • a resin material of the cage featuring the high general-purpose versatility may include glass fiber-reinforced nylon and the like, whereas a metal material of the cage featuring the high general-purpose versatility may include mild steel plate and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)
US10/544,675 2003-02-07 2004-02-05 Method for assembling rolling bearing device Abandoned US20060179656A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2003031472A JP2004263722A (ja) 2003-02-07 2003-02-07 転がり軸受装置の組立方法
JP2003-31472 2003-02-07
PCT/JP2004/001185 WO2004070222A1 (ja) 2003-02-07 2004-02-05 転がり軸受装置の組立方法

Publications (1)

Publication Number Publication Date
US20060179656A1 true US20060179656A1 (en) 2006-08-17

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ID=32844299

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/544,675 Abandoned US20060179656A1 (en) 2003-02-07 2004-02-05 Method for assembling rolling bearing device

Country Status (6)

Country Link
US (1) US20060179656A1 (ja)
EP (1) EP1596081B1 (ja)
JP (1) JP2004263722A (ja)
KR (1) KR20050105999A (ja)
DE (1) DE602004026550D1 (ja)
WO (1) WO2004070222A1 (ja)

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Publication number Priority date Publication date Assignee Title
US20090252445A1 (en) * 2007-03-15 2009-10-08 Jtekt Corporation Tapered roller bearing apparatus and hub unit
CN103029514A (zh) * 2011-12-02 2013-04-10 天津日进汽车系统有限公司 汽车车轮轴承
US20150369290A1 (en) * 2014-06-24 2015-12-24 Aktiebolaget Skf Bearing cage for a rolling-element bearing, in particular for a tapered roller bearing

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JP2007078047A (ja) * 2005-09-13 2007-03-29 Ntn Corp 円錐ころ軸受およびこれを備えた車輪用軸受装置
KR100869494B1 (ko) * 2008-05-23 2008-11-19 최민정 운동기구용 수밀 베어링

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US6135643A (en) * 1997-07-28 2000-10-24 Ntn Corporation Hub unit bearing assembly and a method of making the same
US6397471B1 (en) * 1998-12-25 2002-06-04 Nsk, Ltd. Cage assembling apparatus
US6581288B1 (en) * 2002-04-17 2003-06-24 The Timken Company Method of assembling a package bearing and an assembly tool therefore

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JPH0529790Y2 (ja) * 1986-06-27 1993-07-29
DE69929480T3 (de) * 1998-08-18 2009-11-19 Nsk Ltd. Kraftfahrzeugnabeneinheit
JP4644960B2 (ja) 2001-03-26 2011-03-09 日本精工株式会社 自動車用ハブユニットの組立方法
JP4501324B2 (ja) * 2001-08-09 2010-07-14 日本精工株式会社 複列円すいころ軸受ユニットの組立方法

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Publication number Priority date Publication date Assignee Title
US6135643A (en) * 1997-07-28 2000-10-24 Ntn Corporation Hub unit bearing assembly and a method of making the same
US6397471B1 (en) * 1998-12-25 2002-06-04 Nsk, Ltd. Cage assembling apparatus
US6581288B1 (en) * 2002-04-17 2003-06-24 The Timken Company Method of assembling a package bearing and an assembly tool therefore

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090252445A1 (en) * 2007-03-15 2009-10-08 Jtekt Corporation Tapered roller bearing apparatus and hub unit
US9051964B2 (en) * 2007-03-15 2015-06-09 Jtekt Corporation Tapered roller bearing apparatus and hub unit
CN103029514A (zh) * 2011-12-02 2013-04-10 天津日进汽车系统有限公司 汽车车轮轴承
US20150369290A1 (en) * 2014-06-24 2015-12-24 Aktiebolaget Skf Bearing cage for a rolling-element bearing, in particular for a tapered roller bearing

Also Published As

Publication number Publication date
WO2004070222A1 (ja) 2004-08-19
EP1596081A1 (en) 2005-11-16
EP1596081B1 (en) 2010-04-14
DE602004026550D1 (de) 2010-05-27
KR20050105999A (ko) 2005-11-08
EP1596081A4 (en) 2006-11-02
JP2004263722A (ja) 2004-09-24

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