WO2007138738A1 - Dispositif de palier pour roue - Google Patents

Dispositif de palier pour roue Download PDF

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Publication number
WO2007138738A1
WO2007138738A1 PCT/JP2007/000551 JP2007000551W WO2007138738A1 WO 2007138738 A1 WO2007138738 A1 WO 2007138738A1 JP 2007000551 W JP2007000551 W JP 2007000551W WO 2007138738 A1 WO2007138738 A1 WO 2007138738A1
Authority
WO
WIPO (PCT)
Prior art keywords
seal
wheel
bearing device
slinger
fitted
Prior art date
Application number
PCT/JP2007/000551
Other languages
English (en)
Japanese (ja)
Inventor
Akira Torii
Kiyotake Shibata
Syougo Suzuki
Kazunari Yamamoto
Kazuhisa Shigeoka
Hironori Imanaka
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 JP2006146824A external-priority patent/JP2007315527A/ja
Priority claimed from JP2006204189A external-priority patent/JP2008032067A/ja
Application filed by Ntn Corporation filed Critical Ntn Corporation
Publication of WO2007138738A1 publication Critical patent/WO2007138738A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7896—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members with two or more discrete sealings arranged in series
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for tapered roller 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • F16C33/7883—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
    • F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
    • F16J15/3264—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals the elements being separable from each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Definitions

  • the present invention relates to a wheel bearing device that rotatably supports a wheel of an automobile or the like, and more particularly to a wheel bearing device that improves the sealing performance of a seal.
  • a wheel bearing device for supporting a wheel of an automobile or the like is such that a hub wheel for mounting a wheel is rotatably supported via a re-bearing, and there is a drive wheel and a driven wheel. is there.
  • 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 such as off-road cars and trucks that have a heavy body weight.
  • a seal device is attached, and the space between the outer member and the inner member is sealed.
  • a sealing member having a sealing lip is attached to an outer member serving as a fixed side member, and the sealing lip is in sliding contact with the outer peripheral surface of the inner member.
  • various measures are taken to further improve the sealing performance.
  • the wheel bearing device includes a knuckle 51 fixed to the chassis, an axle 52 extending through the knuckle 51, and a periphery of the axle 52, and is attached to a wheel (not shown).
  • the hub wheel 5 4 fastened via the Pol ⁇ 5 3, the wheel bearing 5 5 fixed to the knuckle 5 1 and rotatably supporting the hub wheel 5 4 and the axle 5 2, and controlled by the air pressure,
  • a clutch 5 6 that engages and disengages the axle 5 2 and the hub wheel 5 4 I have.
  • An annular chamber (vacuum chamber) 5 7 is formed between the knuckle 51 and the axle 52, and is communicated with a clutch 56 provided in the closed chamber 58 on the side of the car pod.
  • a clutch 56 provided in the closed chamber 58 on the side of the car pod.
  • the annular chamber 57 communicates with a vacuum pump (not shown) through a vacuum passage 59 extending obliquely through the knuckle 51.
  • the wheel bearing 5 5 has a vehicle body mounting flange 6 0 b integrally attached to the knuckle 5 1 on the outer periphery, and a double-row outer rolling surface 6 0 a, 6 having a tapered shape on the inner periphery.
  • An outer member 60 having a 0 a formed thereon, and tapered inner rolling surfaces 6 1 a, 6 2 a opposed to the double row outer rolling surfaces 6 0 a, 60 a on the outer periphery are formed respectively.
  • the inner rings 6 1 and 6 2 and double row tapered rollers 6 3 and 6 3 accommodated between both rolling surfaces and these double row tapered rollers 6 3 and 6 3 are held freely to roll. It consists of double row tapered roller bearings equipped with cages 6 4 and 6 4 to be operated.
  • the hub wheel 5 4 has a wheel mounting flange 65 for integrally mounting a wheel (not shown) at one end, and has a small cylindrical diameter extending in the axial direction from the wheel mounting flange 65 on the outer periphery.
  • a stepped portion 5 4 a is formed.
  • the wheel bearing 5 5 is press-fitted into the small diameter step portion 5 4 a of the hub wheel 5 4 and is fixed in the axial direction by a fixing nut ⁇ 6 6.
  • a plain bearing 6 7 is attached between the axle 52 and the hub wheel 54 to allow relative rotation.
  • Seals 6 8 and 6 9 are attached to both ends of the wheel bearing 5 5 to seal the opening of the annular space formed between the outer member 60 and the inner rings 61 and 62. In addition, it is isolated from the annular chamber 57 and the surrounding environment.
  • the seal 68 includes an outer case 70 that is press-fitted into the outer member 60 and an inner case 71 that is press-fitted into the inner ring 61. Seal lips 70 a and 71 a are joined to the inner edge of the outer case 70 and the outer edge of the inner case 71, respectively, and are in sliding contact with the inner case 71 and the outer case 70.
  • seal lips 7 0 a and 7 1 a bend in the presence of a differential pressure between the inside of the wheel bearing 5 5 and the annular chamber 5 7, and the wheel bearing 5 5
  • the inside is configured to be discharged into the annular chamber 57. Therefore, the inside of the wheel bearing 55 is subjected to substantially the same pressure as the annular chamber 57 when the annular chamber 57 is exhausted.
  • the seal 6 9 includes an outer case 7 2 press-fitted into the outer member 60, and an inner case 7 3 press-fitted into the inner ring 62. It has. A seal lip 7 2 a that is in sliding contact with the inner case 73 and a side lip 7 2 b that is in sliding contact with the side surface of the wheel mounting flange 65 are joined to the end portion of the outer case 72. Further, a seal lip 7 3 a slidably contacting the outer case 7 2 is joined to the outer edge of the inner case 7 3.
  • This seal 69 supports the pressure difference so that the interior of the wheel bearing 55 is maintained at a reduced pressure, and further prevents rainwater, dust, etc. from entering the bearing (for example, patents). Refer to Reference 1.)
  • Patent Document 1 discloses another seal 74. That is, the seal 7 4 when the side lip 7 2 b of the seal 6 9 does not have the side surface of the wheel mounting flange 65 with which the side lip 7 2 b is slidably contacted is, as shown in FIG.
  • An outer case 75 that is press-fitted to 0, a carrier 76 that is press-fitted to the inner ring 62, and an inner case 7 7 that is externally fitted to and integrated with the carrier 76 are provided.
  • the carrier 76 protrudes from the outer case 75 in both the axial direction and the radial direction, and extends in the radial direction beyond the outer case 75.
  • the seal 74 has a labyrinth seal composed of a side lip 7 2 b slidably contacting the carrier 7 6, an outer case 7 5, an inner case 7 7, and a carrier 7 6. Is prevented from entering.
  • Patent Document 1 Special Table 2 0 0 1-5 1 0 5 3 4
  • the seal 74 having the carrier 76 has a complicated structure, which makes it difficult to assemble it into the mounting and the bearing, resulting in an increase in cost.
  • the present invention has been made in view of such circumstances, and provides a wheel bearing device capable of improving the sealing performance of a seal and maintaining the bearing performance over a long period of time. It is an object.
  • the wheel bearing device integrally has a vehicle body mounting flange for mounting to the suspension device of the vehicle body on the outer periphery.
  • An outer member having a double row outer raceway formed on the periphery, a hub wheel having a wheel mounting flange for attaching a wheel to one end, and a small diameter step on the outer periphery, and It consists of an inner ring fitted to the small diameter step of the hub wheel or an outer joint member of a constant velocity universal joint, and a double row inner rolling surface facing the outer rolling surface of the double row is formed on the outer periphery.
  • An inner member a double-row rolling element that is rotatably accommodated between both rolling surfaces of the inner member and the outer member via a cage, and the outer member and the inner member.
  • a wheel bearing device comprising a seal attached to an end portion of the annular space formed between The seal on the board side is formed in a substantially L-shaped cross section and opposed to each other.
  • the first core bar press-fitted into the inner periphery of the end of the outer member and the first core bar are integrated with each other.
  • the side is formed by a composite seal composed of an annular seal plate made of a joined first seal member and a slinger pressed into the outer periphery of the inner member, and the first seal member is in sliding contact with the slinger.
  • the outer portion A cylindrical fitting portion that is press-fitted into the outer periphery of the end portion of the material, a disc portion that extends radially inward from the fitting portion, and that is in close contact with the end portion of the outer member, and further from the disc portion
  • a second metal core comprising an inner end extending radially inward
  • a back-up seal comprising a second seal member integrally joined to the second metal core, wherein the second seal member comprises A seal lip extending inward in the radial direction and integrally contacting the slinger is integrally provided.
  • the wheel bearing device of the second to fourth generation structure provided with the seal mounted on the end of the annular space formed by the outer member and the inner member on the side of the board.
  • the seal on the outboard side has a substantially L-shaped cross section and is opposed to each other.
  • the first core bar press-fitted into the inner periphery of the end of the outer member and the first core bar are integrally joined.
  • the first seal member is composed of a composite seal composed of an annular seal plate made of a first seal member and a slinger press-fitted to the outer periphery of the inner member.
  • the first seal member has a side lip that slidably contacts the slinger.
  • a cylindrical fitting portion that is press-fitted to the outer periphery of the end portion of the outer member on the outer side of the seal, and a circle that extends radially inward from the fitting portion and closely contacts the end portion of the outer member A plate portion and an inner end portion extending further inward in the radial direction from the disk portion
  • a back up seal comprising a second seal member integrally joined to the second core, the second seal member extending radially inwardly, Since it has a seal lip that slides in contact with the slinger, it prevents rainwater and dust traps from directly entering the seal, improving the sealing performance of the seal even when used in a poor environment. It is possible to provide a wheel bearing device that can maintain the bearing performance for a long period of time.
  • the second seal member is joined from the outer surface of the inner end portion of the second cored bar to the end edge of the fitting portion, Of the core If the entire exposed area is covered, low-priced cold rolled steel such as SPCC can be used without using an expensive stainless steel plate with anti-corrosion performance on the core metal, thereby reducing costs. be able to.
  • the second seal member extends obliquely outward in the radial direction from the inner end portion of the second cored bar, and the trumpet has a diameter enlarged tip end portion. If the side lip is integrally formed and the side lip is in sliding contact with the wheel mounting flange, the sealing performance of the seal on the board side can be further improved, and the wheel mounting flange It is possible to prevent muddy water or the like from staying in the narrow annular space of the base of the base and generating the base and reducing the strength and durability.
  • FIG. 1 is a longitudinal sectional view showing an embodiment of a wheel bearing device according to the present invention.
  • FIG. 2 is an enlarged view of the main part showing the seal of FIG.
  • FIG. 3 is an enlarged view of a main part showing a modification of the seal of FIG.
  • FIG. 4 is an enlarged view of a main part showing another modification of the seal of FIG.
  • FIG. 5 is an enlarged view of a main part showing a seal according to another embodiment.
  • FIG. 6 is a longitudinal sectional view showing a conventional wheel bearing device.
  • FIG. 7] (a) is an enlarged view of a main part showing the seal of FIG. (B) is an enlarged view of the main part showing another seal.
  • FIG. 8 The first structure of the wheel bearing device according to the applied technology having a basic structure different from that of the present invention. It is sectional drawing and a partial enlarged view which show an example.
  • FIG. 9 is a similar view of the second configuration example.
  • a hub wheel having a wheel mounting flange for mounting a wheel at one end and an outer periphery formed with a small-diameter step portion extending in an axial direction from the wheel mounting flange, and a small-diameter step portion of the hub wheel It is composed of a press-fitted wheel bearing, and this wheel bearing has a body mounting flange integrally attached to the suspension on the outer periphery, and an outer side in which a double row outer rolling surface is formed on the inner periphery.
  • a pair of inner rings each having an inner rolling surface formed on the outer periphery and facing the outer rolling surface of the double row, and a double row of the double row accommodated between the rolling surfaces via a cage.
  • the inner ring is fixed in the axial direction by a caulking portion formed by plastic deformation.
  • the seal on the outboard side has a substantially L-shaped cross section and is opposed to each other, and is press-fitted into the inner periphery of the end of the outer member and A composite comprising an annular seal plate made of a first seal member integrally joined to the first cored bar, and a slinger formed by press working from a steel plate press-fitted into the outer periphery of the inner ring and having a fender resistance.
  • the first seal member has a side lip that is in sliding contact with the slinger, and a backup seal is provided on the outer side of the seal.
  • the backup seal is an end of the outer member.
  • a cylindrical fitting portion that is press-fitted into the outer periphery of the portion, a disc portion that extends radially inward from the fitting portion, and that is in close contact with the end portion of the outer member, and further radially inward from the disc portion
  • An inner end extending in the direction of
  • FIG. 1 is a longitudinal sectional view showing an embodiment of a wheel bearing device according to the present invention
  • FIG. 2 is an enlarged view of a main part showing the seal of FIG. 1
  • FIG. 3 shows a modification of the seal of FIG.
  • FIG. 4 is an enlarged view of a main part showing another modification of FIG. 2
  • FIG. 5 is an enlarged view of the main part showing another seal.
  • the side closer to the outside of the vehicle in the state assembled to the vehicle is referred to as the outboard side (left side of the drawing), and the side closer to the center is referred to as the inboard side (right side of the drawing).
  • This wheel bearing device is for a drive wheel called a second generation, and includes a hub wheel 1 and a wheel bearing 2.
  • the wheel bearing 2 includes an outer member 3, a double row A pair of inner rings 5 and 5 fitted through rolling elements (conical rollers) 4 and 4 are provided.
  • the hub wheel 1 integrally has a wheel mounting flange 6 for mounting a wheel (not shown) at one end, and a cylindrical small diameter step extending in an axial direction from the wheel mounting flange 6 on the outer periphery.
  • a portion 1a is formed, and a torque transmission selection (or spline) 1b is formed on the inner periphery.
  • hub ports 6 a are planted at equal intervals in the circumferential direction.
  • the wheel bearing 2 is a crimped portion 1 formed by press-fitting the hub wheel 1 into the small-diameter step portion 1a through a predetermined shim opening and plastically deforming the end of the small-diameter step portion 1a radially outward. Fixed to the hub wheel 1 in the axial direction with a predetermined bearing preload applied by c.
  • the hub wheel 1 is formed of medium carbon steel containing carbon 0.40 to 0.80 wt% such as S 53 C, and a base portion formed in an arc shape on the inboard side of the wheel mounting flange 6
  • the surface hardness is hardened to a range of 58 to 64 HRC by induction quenching from 6b to the small diameter step 1a through the shoulder 1d. This provides sufficient mechanical strength against the rotational bending load applied to the wheel mounting flange 6 and improves the fretting resistance of the small-diameter stepped portion 1 a that becomes the fitting portion of the inner rings 5 and 5. .
  • the outer member 3 is integrally formed with a vehicle body mounting flange 3b for attaching to a knuckle (not shown) on the outer periphery, and has a tapered double-row outer roll that opens outward on the inner periphery.
  • Running surfaces 3a and 3a are formed on the body.
  • This outer member 3 is formed of medium carbon steel containing carbon 0.40 to 0.8 O wt% such as S 53 C, and at least double row outer rolling surfaces 3 a, 3 a are high frequency. The surface hardness is hardened by quenching to a range of 58 to 64 HRC.
  • the inner ring 5 On the other hand, on the outer periphery of the inner ring 5, there are teeth facing the double row outer rolling surfaces 3a, 3a.
  • the inner ring 5 and the rolling element 4 are made of high carbon chrome steel such as SUJ 2 and hardened in the range of 58 to 64 HRC to the core part by quenching.
  • the double-row rolling elements 4 and 4 are accommodated between the rolling surfaces of the outer member 3 and the pair of inner rings 5 and 5, and are held by the cages 7 and 7 so as to be freely rollable.
  • This wheel bearing 2 is composed of a so-called back-to-back type double row conical roller bearing that abuts against the shoulder 1 d of the hub wheel 1 and the small ridges 5 c of the inner ring 5 abut each other in a butted state. ing.
  • seals 8 and 8 are attached to the end of the annular space and the inboard side of the annular space formed between the outer member 3 and the inner ring 5, respectively. These seals 8 and 8 prevent the grease sealed inside the bearing from leaking to the outside and preventing rainwater and dust from entering the bearing from the outside.
  • the seal 8 is a composite seal composed of an annular seal plate 9 and a slinger 10 having a substantially L-shaped cross section and arranged to face each other, a so-called pack seal. Is configured.
  • the seal plate 9 includes a first metal core 11 that is press-fitted into the inner periphery of the end of the outer member 3, and a first seal member 1 2 that is bonded to the first metal core 11 by vulcanization adhesion to the Lie body. It consists of.
  • the first metal core 11 can be pressed from austenitic stainless steel (JIS standard SUS 304 series, etc.) or cold-rolled cold-rolled steel (JIS standard SPCC, etc.). Formed
  • slinger 10 is pressed from austenitic stainless steel plate (JIS standard SUS 304 system, etc.) or anti-corrosion cold rolled steel plate (JIS standard SPCC system, etc.).
  • a cylindrical portion 1 O a formed by machining and press-fitted into the large collar 5 b of the inner ring 5 and a standing plate portion 10 b extending radially outward from the cylindrical portion 10 a.
  • the lislinger 10 has anti-fungal properties and can prevent generation over a long period of time.
  • the pair of side lips 1 2 a and 1 2 b are in sliding contact with the standing plate portion 10 0 b of the slinger 10 and the radial lip 1 2 c Is in sliding contact with the cylindrical portion 10 a.
  • a backup seal 1 3 is further press-fitted into the outer periphery of the end portion of the outer member 3.
  • the backup seal 13 includes a second metal core 14 and a second seal member 15 integrally vulcanized and bonded to the second metal core 14.
  • the second metal core 14 can be pressed from an austenitic stainless steel plate (JIS standard SUS 304 system, etc.), or a cold-rolled steel plate (JIS standard SPCC system, etc.) that has undergone anti-corrosion treatment.
  • a cylindrical fitting portion 14 a that is press-fitted and fixed to the outer periphery of the end of the outer member 3 on the outboard side, and extends radially inward from the fitting portion 14 a.
  • the outer member 3 includes a disc portion 14 b that is in close contact with the end portion of the outer board 3 and an inner end portion 14 c that extends further radially inward from the disc portion 14 b.
  • the second seal member 15 is joined to the inner end portion 14 c of the second metal core 14, and has a side lip 15 a extending obliquely inward in the radial direction.
  • the side lip 15 a is in sliding contact with the outer surface of the standing plate portion 10 b of the slinger 10, and prevents rainwater, dust and the like from directly entering the seal 8. Thereby, even when used in a poor environment, it is possible to provide a wheel bearing device that can improve the sealing performance of the seal 8 and maintain the bearing performance for a long period of time.
  • the wheel bearing device according to the present invention is not limited to this, and may be on the driven wheel side. It may be a 4th generation structure. Furthermore, in the present embodiment, a double row tapered roller bearing using a conical roller for the rolling element 4 is illustrated, but of course, not limited to this, even if it is a double row angular ball bearing using a pole for the rolling element 4 good.
  • FIG. 3 shows a modification in which the configuration of the backup seal 13 in FIG. 2 is partially different.
  • the same parts as those in the above-described embodiment, or parts having the same functions are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the backup seal 16 attached to the end of the outer member 3 on the wide side is integrally formed with the second core metal 14 and the second core metal 14. Vulcanization adhesion
  • the sealing member 17 is formed.
  • the seal member 17 is joined from the inner side surface of the inner end portion 14c of the second core metal 14 to the disk portion 14b, and extends sideward in the radial direction. have.
  • the airtightness of the backup seal 16 can be increased, and the sealability of the seal 8 can be further improved.
  • FIG. 4 shows a modified example in which the configuration of the backup seal 13 of FIG. 2 is partially different.
  • the backup seal 18 is composed of a second metal core 14 and a seal member 19 integrally bonded to the second metal core 14 by vulcanization.
  • the seal member 19 is joined from the outer surface of the inner end portion 14c of the second core bar 14 to the end edge of the fitting portion 14a, and covers the entire exposed portion of the second core bar 14 Covering.
  • FIG. 5 shows another embodiment of the backup seal 13 of FIG.
  • the back-up seal 20 attached to the end of the outer member 3 on the side of the board is vulcanized and bonded integrally to the second core metal 14 and the second core metal 14.
  • a sealing member 21 a sealing member 21.
  • the seal member 21 has a side lip 21a that is in direct sliding contact with the base 6b of the wheel mounting flange 6 in addition to the side lip 15a that is in sliding contact with the standing plate portion 10b of the slinger 10.
  • the side lip 21 1 a extends from the inner end portion 14 c of the second core metal 14 in an inclined manner outward in the radial direction, and is formed in a trumpet shape in which the tip end portion expands in diameter.
  • the sealing performance of the seal 8 can be further improved, and muddy water or the like stays in the narrow annular space between the hub wheel 1 and the wheel bearing 2, and the base portion 6b of the wheel mounting flange 6 Splashing and strength (2) It is possible to suppress a decrease in durability.
  • the wheel bearing device described above has an outer member having a double-row raceway surface on the inner periphery and a flange for attachment to a vehicle body on the outer periphery, and a raceway surface facing the raceway surface on the outer periphery.
  • a wheel bearing device comprising: an inner member having a wheel mounting flange on the side board side end; and a double row rolling element interposed between the outer member and the raceway surface of the inner member.
  • An L-shaped seal contact ring having a standing plate portion covering the end surface of the outer member on the side of the board and a cylindrical portion covering the outer peripheral surface is mounted, and an inboard of a flange for mounting the wheel of the inner member
  • a seal having a metal core attached to the side surface of the side and an elastic body fixed to the metal core is provided, and the tip of the seal is in sliding contact with the standing plate portion of the seal contact ring attached to the outer member.
  • a seal lip is provided.
  • the seal lip of the seal attached to the side surface on the inboard side of the wheel mounting flange via the mandrel is attached to the stand plate of the seal contact ring attached to the outer member. Touch the tip. For this reason, the contact of the core metal and the seal lip with the stance plate portion provides a seal on the side of the bearing of the bearing device.
  • the contact between the seal lip and the standing plate portion is made in a wider range in the radial direction than the conventional high pack seal, and the seal size is substantially increased, so that the seal performance is enhanced.
  • the object of sliding contact of the seal lip is not the wheel mounting flange, there is no influence of the generation of the wheel mounting flange, and there is no concern that the sealing performance will be reduced. Since the seal contact ring itself can be easily manufactured separately from a non-elastic material such as SUS, it is possible to prevent deterioration of the sealing performance over time due to the generation of the sliding contact object. it can.
  • a non-contact seal gap is formed between the seal metal core and the seal contact ring, located on the outer diameter side of the seal lip.
  • a non-contact seal gap forming portion may be provided on the core metal of the seal or the seal contact ring.
  • a non-contact seal gap is formed between the seal core and the seal contact ring, which is located on the outer diameter side of the seal lip. Intrusion of sludge, dust, etc. from the outside to the sliding contact portion between the seal contact ring and the stand plate portion of the seal contact ring is prevented, and the seal performance is further improved. Since it is a non-contact seal, it does not wear, the seal performance does not deteriorate due to wear, and an increase in torque can be avoided.
  • a radial lip that is a seal lip in contact with the outer diameter surface of the inner member may be provided on the elastic body of the seal.
  • the inner member may include a hub ring having the wheel mounting flange and an inner ring fitted to the outer periphery of the hub ring.
  • the wheel bearing device provided with such an inner member is widely used as a bearing device for automobiles, and the excellent sealing performance described above is effective in a severe use environment peculiar to automobiles.
  • the radial lip is in contact with the outer diameter surface of the inner ring, it prevents the Frederick wear powder generated at the abutting portion between the hub ring and the inner ring from entering the bearing space, and this wear powder is transferred. It does not squeeze between the moving body and the raceway to reduce the durability of the bearing.
  • This wheel bearing device A is a second generation type bearing device for a drive wheel, and an outer member 3 1 which is a bearing outer ring having two rows of raceway surfaces 3 1 a and 3 1 b, and Two inner rings 3 2 and 3 3 each having a raceway surface 3 2 a and 3 3 a facing each raceway surface 3 1 a and 3 1 b and a hub wheel 3 4 are provided.
  • the hub ring 3 4 and the inner rings 3 2 and 3 3 constitute an inner member 3 4 A.
  • the hub wheel 3 4 has a hollow shaft portion 3 4 a and a wheel mounting flange 3 4 b, and the shaft portion 3 4 a is press-fitted into the inner circumferences of the two inner rings 3 2 and 3 3.
  • the hollow portion of the shaft portion 3 4 a in the hub ring 3 4 is a spline shaft hole, and is not shown in the figure.
  • the front connecting shaft portion of the speed joint is fitted and fixed, which causes the hub wheel 3 4 to drive and rotate.
  • a wheel (not shown) is attached to the wheel mounting flange 3 4 b by a port 3 4 c.
  • the outer member 31 includes a flange 31c and is fixed to a vehicle body (not shown) through a port hole 31d such as a female screw formed in the flange 31c.
  • a plurality of rolling elements 35 made of tapered rollers are interposed in two rows.
  • the moving body 3 5 is held by the cage 3 6.
  • a seal 3 8 made of a combination seal or the like is interposed.
  • the overall configuration of the wheel bearing device A shown in Fig. 8 is substantially the same as the overall configuration of the conventional wheel bearing device shown in Fig. 6 as described above, but on the board side. Seal structure is different.
  • an outboard side end portion of an outer member 31 as an outer member is provided with a standing leg plate portion 4 2 a covering the end surface and a cylindrical portion 4 2 b covering the outer peripheral surface.
  • An L-shaped seal contact ring 42 having a press fitting is attached.
  • an annular core metal 43 is fixed to the side surface of the wheel mounting flange 3 4 b formed on the hub ring 3 4 as an inner member on the impinge side.
  • An elastic body 44 made of a rubber material or the like is fixed to the core metal 43, and the elastic body 44 and the core metal 43 constitute a seal 45.
  • the elastic body 44 is provided with two seal lips 44 a whose front ends are in elastic sliding contact with the standing plate part 4 2 a of the seal contact ring 42 attached to the outer member 31.
  • the core metal 4 3 and the seal contact ring 4 2 are made of a non-elastic metal such as SUS.
  • the core metal 43 has an annular mounting base 4 3a fixed to the side surface of the wheel mounting flange 3 4b on the impound side, and extends from the inner peripheral edge of the mounting base 4 3a to the inboard side. It is made up of a cylindrical part 4 3 b and an inward flange part 4 3 c that is bent inward from the end of this cylindrical part 4 3 b. It is a thing.
  • the elastic body 44 is fixed so as to cover the entire inboard side of the inwardly saddle-shaped portion 4 3 c and a part of the outer diameter surface of the cylindrical portion 4 3 b. Yes.
  • the elastic body 44 has a radial lip 4 4 b as a seal lip that elastically contacts the outer diameter surface of the outer ring 3 2 on the outboard side, and from the outer diameter side.
  • a cylindrical portion 4 4 c extending to the outer diameter surface of the cylindrical portion 4 2 b of the seal contact ring 42.
  • a non-contact gap r 1 serving as a labyrinth gap is formed between the inner diameter surface of the cylindrical portion 44 c and the outer diameter surface of the cylindrical portion 42 b of the seal contact ring 42.
  • the cylindrical portion 4 4 c is a non-contact seal gap forming portion that forms a non-contact gap r 1 between the core metal 43 and the seal contact ring 42.
  • a rubber vulcanized adhesive layer 4 2 c is interposed in the press-fit fitting part between the cylindrical part 4 2 b of the seal contact ring 4 2 and the outer member 3 1, and the seal contact ring 4 2 is fitted
  • the fixing is strengthened, and the fitting surface of the outer member 31 is prevented from being flared.
  • a seal 4 5 consisting of a core metal 4 3 and an elastic body 4 4 fixed to the core metal 4 3 is a seal lip 4 4 At the tip of a, contact the stand plate part 4 2 a of the seal contact ring 4 2.
  • the lubricant filled in the bearing space S does not leak out, and water, sludge or dust is prevented from entering the bearing space from the outside.
  • the elastic sliding contact range between the seal lip 4 4 a and the stance plate portion 4 2 a can be secured large in the radial direction, the substantial seal size is increased and the seal performance is enhanced. .
  • the radial lip 4 4 b in contact with the outer diameter surface of the inner ring 3 2 further enhances the sealing performance described above, and wear caused at the abutting portion 3 4 d of the hub 3 4 with the inner ring 3 2 Infiltration of powder (fretting wear powder) into the bearing space S is prevented. Therefore, the fretting wear powder does not enter the bearing space S and damage the raceway surfaces 3 1 a, 3 1 b, 3 2 a, 3 3 a and the surface of the rolling element 3 5. Durability does not decrease. Further, the non-contact gap r 1 prevents entry of dust or the like into the space surrounded by the elastic body 4 4 and the standing plate portion 4 2 a of the seal contact ring 4 2.
  • FIG. 9 shows a wheel bearing device B according to a second specific configuration example.
  • the overall configuration of the wheel bearing device B of this configuration example is the same as the overall configuration of the wheel bearing device A of the embodiment shown in FIG. 8 except for the seal structure on the board side.
  • symbol is attached
  • the elastic body 44 is fixed so as to cover substantially the entire surface of the inboard side surface of the inward flange portion 43 c of the core metal 43, and is in a sealing contact as in the above embodiment. Cylindrical part 4 2 c of cylindrical part 4 2 b extending to the vicinity of the outer peripheral surface of ring 4 2 b is not formed.
  • the cylindrical part 4 2 b of seal contact ring 4 2 is folded back from the inboard side.
  • the folded cylindrical portion 4 2 ba extending to the vicinity of the outer diameter surface of the cylindrical portion 4 3 b of the core metal 4 3 is formed.
  • a non-contact gap r 2 serving as a labyrinth gap is formed between the inner diameter surface of the folded cylindrical portion 4 2 ba and the outer cylindrical surface of the cylindrical portion 4 3 b of the core metal 4 3, and the folded cylindrical portion 4 2 ba is a non-contact seal gap forming portion that forms a non-contact gap r 2 between the core metal 4 3 and the seal contact ring 4 2.
  • a rubber vulcanized adhesive layer 4 2 c is interposed in the press-fitting fitting portion between the cylindrical portion 4 2 b of the seal contact ring 42 and the outer member 31, and the outer The fitting surface of the side member 3 1 is prevented from being cracked.
  • the metal core 4 3 and the seal are provided between the outer member 3 1 on the wide-port side and the wheel mounting flange 3 4 b of the hub wheel 3 4.
  • the lubricant filled in the bearing space is not leaked, and water, sludge or dust is prevented from entering the bearing space from the outside.
  • the radial lip 4 4 b further enhances the sealing performance as described above, and prevents the wear powder (fretting wear powder) from entering the bearing space.
  • the non-contact gap r 2 prevents dust and the like from entering the space surrounded by the elastic body 4 4 and the stand plate portion 4 2 a of the seal contact ring 4 2.
  • the example of the second generation type bearing device for the drive wheel has been described.
  • the inner member is arranged in one row with the hub wheel.
  • This applied technology can also be applied to the third generation type, which is a wheel bearing device with an inner ring, or the fourth generation bearing device, in which the inner member is a hub ring and an outer ring of a constant velocity joint.
  • this applied technology can be applied not only to the tapered roller bearing type but also to an angular ball bearing type wheel bearing device.

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

Abstract

La présente invention concerne un dispositif de palier pour roue, dans lequel les capacités d'étanchéité d'un joint sont renforcées afin de conserver la performance d'un palier à long terme. Un joint (8), disposé sur le côté extérieur, est obtenu à partir d'une plaque d'étanchéité annulaire (9) et d'une bague d'étanchéité (10) qui possèdent une section transversale sensiblement en forme de L et sont placées de manière opposée l'une par rapport à l'autre. La plaque d'étanchéité annulaire (9) est obtenue à partir d'une première âme métallique (11) ajustée par pression dans la périphérie interne sur une extrémité d'un élément externe (3) et d'un premier élément d'étanchéité (12) relié à la première âme métallique (11). La bague d'étanchéité (10) est ajustée par pression sur la périphérie externe d'une bague interne (5). L'élément d'étanchéité (12) possède des lèvres latérales (12a, 12b) en contact coulissant avec la bague d'étanchéité (10). Un joint de maintien (13) est disposé sur le côté externe du joint (8) et le joint de maintien (13) possède une seconde âme métallique (14) ajustée par pression sur la périphérie externe à l'extrémité de l'élément externe (3) et possède aussi un second élément d'étanchéité (15) intégralement relié avec une section terminale interne de la seconde âme métallique (14). Le second élément joint (15) s'incline en s'étendant radialement vers l'intérieur et possède une lèvre d'étanchéité (15a) incorporée en contact coulissant avec la bague d'étanchéité (10). La construction empêche que l'eau de pluie, la poussière, etc. n'entrent directement dans le joint (8), ce qui permet de renforcer ses capacités d'étanchéité.
PCT/JP2007/000551 2006-05-26 2007-05-23 Dispositif de palier pour roue WO2007138738A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2006-146824 2006-05-26
JP2006146824A JP2007315527A (ja) 2006-05-26 2006-05-26 車輪用軸受装置
JP2006-204189 2006-07-27
JP2006204189A JP2008032067A (ja) 2006-07-27 2006-07-27 車輪用軸受装置

Publications (1)

Publication Number Publication Date
WO2007138738A1 true WO2007138738A1 (fr) 2007-12-06

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011037183A1 (fr) * 2009-09-25 2011-03-31 Ntn株式会社 Dispositif de coussinet pour une roue
WO2013000826A1 (fr) * 2011-06-28 2013-01-03 Aktiebolaget Skf Dispositif palier
JP2015052350A (ja) * 2013-09-06 2015-03-19 内山工業株式会社 軸受密封装置
FR3074861A1 (fr) * 2017-12-08 2019-06-14 Ntn-Snr Roulements Palier a roulement equipe d'un dispositif d'etancheite
WO2022081372A1 (fr) * 2020-10-12 2022-04-21 Federal-Mogul Motorparts Llc Ensemble moyeu de roue et procédé de test d'un tel ensemble

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004205008A (ja) * 2002-12-26 2004-07-22 Koyo Seiko Co Ltd 転がり軸受装置
WO2006008898A1 (fr) * 2004-07-16 2006-01-26 Nok Corporation Dispositif d’étanchéité
JP2006125536A (ja) * 2004-10-29 2006-05-18 Ntn Corp 回転速度検出装置付車輪用軸受装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004205008A (ja) * 2002-12-26 2004-07-22 Koyo Seiko Co Ltd 転がり軸受装置
WO2006008898A1 (fr) * 2004-07-16 2006-01-26 Nok Corporation Dispositif d’étanchéité
JP2006125536A (ja) * 2004-10-29 2006-05-18 Ntn Corp 回転速度検出装置付車輪用軸受装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011037183A1 (fr) * 2009-09-25 2011-03-31 Ntn株式会社 Dispositif de coussinet pour une roue
WO2013000826A1 (fr) * 2011-06-28 2013-01-03 Aktiebolaget Skf Dispositif palier
JP2015052350A (ja) * 2013-09-06 2015-03-19 内山工業株式会社 軸受密封装置
FR3074861A1 (fr) * 2017-12-08 2019-06-14 Ntn-Snr Roulements Palier a roulement equipe d'un dispositif d'etancheite
WO2022081372A1 (fr) * 2020-10-12 2022-04-21 Federal-Mogul Motorparts Llc Ensemble moyeu de roue et procédé de test d'un tel ensemble

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