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JP2008115998A - Bearing device - Google Patents

Bearing device Download PDF

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Publication number
JP2008115998A
JP2008115998A JP2006301681A JP2006301681A JP2008115998A JP 2008115998 A JP2008115998 A JP 2008115998A JP 2006301681 A JP2006301681 A JP 2006301681A JP 2006301681 A JP2006301681 A JP 2006301681A JP 2008115998 A JP2008115998 A JP 2008115998A
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JP
Japan
Prior art keywords
boot
rolling
peripheral surface
bearing device
constant velocity
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.)
Withdrawn
Application number
JP2006301681A
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Japanese (ja)
Inventor
Hitohiro Ozawa
仁博 小澤
Kenta Yamazaki
健太 山崎
Manabu Hoshino
学 星野
Shinya Nakajo
晋也 中条
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NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
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
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2006301681A priority Critical patent/JP2008115998A/en
Publication of JP2008115998A publication Critical patent/JP2008115998A/en
Withdrawn legal-status Critical Current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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or 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
    • F16C33/7889—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to an inner race and extending toward the outer 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/84—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor
    • F16D3/843—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers
    • F16D3/845—Shrouds, e.g. casings, covers; Sealing means specially adapted therefor enclosed covers allowing relative movement of joint parts due to the flexing of the cover
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/187—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with all four raceways integrated on parts other than race rings, e.g. fourth generation hubs
    • 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
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/16—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts
    • F16D3/20—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members
    • F16D3/22—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts
    • F16D3/223—Universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts one coupling part entering a sleeve of the other coupling part and connected thereto by sliding or rolling members the rolling members being balls, rollers, or the like, guided in grooves or sockets in both coupling parts the rolling members being guided in grooves in both coupling parts

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Devices (AREA)
  • Diaphragms And Bellows (AREA)
  • Sealing Of Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for improving installation work efficiency and disassembling work efficiency, while reducing manufacturing cost by reducing the number of part items. <P>SOLUTION: This bearing device has an outer member 1 forming an outside rolling surface 1b on the inner periphery, an inner member 2 having integrally a shaft-shaped stem 7 and forming inside rolling surfaces 2a and 2b opposed to the outside rolling surface 1b on the outer periphery, a rolling body 33 rollingly installed between both the rolling surfaces 1b, 2a and 2b of the outer member 1 and the inner member 2, and a constant velocity universal joint 4 connected to the stem 7 of the inner member 2. One end of a boot 5 is attached to the outer peripheral surface of an outside joint member 13 of the constant velocity universal joint 4, and the other end of the boots 5 is attached to the outer peripheral surface of the inner member 2, and a seal lip 28 opposed to the inner peripheral surface of the outer member 1 is arranged at the other end of the boot 5. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、自動車の車輪等を支持する軸受装置に関する。   The present invention relates to a bearing device that supports a wheel or the like of an automobile.

例えば、自動車の車輪用軸受装置には、ハブ輪と複列転がり軸受と等速自在継手をユニット化したものがある。具体的には、ハブ輪と等速自在継手の外輪とが一体となった内方部材と、外方部材を備え、内方部材の外周に形成した内側転走面と外方部材の内周に形成した外側転走面との間に転動体（ボール）を転動自在に保持する。   For example, there is an automobile wheel bearing device in which a hub wheel, a double row rolling bearing, and a constant velocity universal joint are unitized. Specifically, an inner member in which the hub wheel and the outer ring of the constant velocity universal joint are integrated, and an inner rolling surface formed on the outer periphery of the inner member and the inner periphery of the outer member. A rolling element (ball) is movably held between the outer raceway and the outer rolling surface.

また、上記等速自在継手の開口部や、転動体を収納する外方部材と内方部材の間に、雨水や埃などが侵入するのを防ぐために、等速自在継手の開口部を筒状のブーツで覆い、外方部材と内方部材との間にシール材を介装していた。   In addition, in order to prevent rainwater and dust from entering between the opening of the constant velocity universal joint and the outer member and the inner member that house the rolling elements, the opening of the constant velocity universal joint is cylindrical. And a sealing material was interposed between the outer member and the inner member.

また、ブーツを内方部材及び駆動軸と供回りしないように、ブーツの一端部を外方部材に付設し、他端部を駆動軸に軸受を介して取り付けたものがある（例えば、特許文献１参照）。
特開平１１−１３７８３号公報 Also, there is one in which one end of the boot is attached to the outer member and the other end is attached to the drive shaft via a bearing so that the boot does not rotate with the inner member and the drive shaft (for example, Patent Documents). 1).
JP-A-11-13783

しかし、上記特許文献１に記載の従来の軸受装置は、駆動軸に軸受を付設しなければならないので、その取付作業が面倒となる上に、コストが高くなるといった欠点があった。   However, since the conventional bearing device described in Patent Document 1 has to be provided with a bearing on the drive shaft, there are drawbacks in that the mounting operation is troublesome and the cost is increased.

そこで、本発明は斯かる実情に鑑み、部品点数を少なくして製造コストの削減を図ると共に、組付け作業性・分解作業性が向上する軸受装置を提供しようとするものである。   Therefore, in view of such circumstances, the present invention aims to provide a bearing device that reduces the number of parts to reduce the manufacturing cost and improves the assembly workability and disassembly workability.

請求項１の発明は、内周に外側転走面を形成した外方部材と、軸状のステム部を有すると共に外周に前記外側転走面と対向する内側転走面を形成した内方部材と、前記外方部材と内方部材の両転走面間に転動自在に内装した転動体と、前記内方部材のステム部と連結した等速自在継手を備えた軸受装置において、前記等速自在継手の外側継手部材の外周面にブーツの一端部を付設すると共に、前記内方部材の外周面に前記ブーツの他端部を付設し、かつ、そのブーツの他端部に前記外方部材の内周面に対向するシールリップを設けたものである。   The invention according to claim 1 is an outer member having an outer rolling surface formed on the inner periphery and an inner member having an axial stem portion and an inner rolling surface facing the outer rolling surface on the outer periphery. And a bearing device including a rolling element that is rotatably mounted between both rolling surfaces of the outer member and the inner member, and a constant velocity universal joint that is connected to a stem portion of the inner member. One end of the boot is attached to the outer peripheral surface of the outer joint member of the speed universal joint, the other end of the boot is attached to the outer peripheral surface of the inner member, and the outer side is attached to the other end of the boot. A seal lip facing the inner peripheral surface of the member is provided.

ブーツの端部（他端部）に設けたシールリップによって、外方部材と内方部材との間に水や埃が侵入することを防止することができる。すなわち、端部にシールリップを有するブーツが、等速自在継手用の防塵カバー部材の役割と、転がり軸受用のシール材の役割を兼ねることができる。   The seal lip provided at the end (the other end) of the boot can prevent water and dust from entering between the outer member and the inner member. In other words, the boot having the seal lip at the end can serve both as a dustproof cover member for a constant velocity universal joint and as a sealant for a rolling bearing.

請求項２の発明は、内周に外側転走面を形成した外方部材と、等速自在継手の外側継手部材を一体に有すると共に外周に前記外側転走面と対向する内側転走面を形成した内方部材と、前記外方部材と内方部材の両転走面間に転動自在に内装した転動体と、前記等速自在継手の内側継手部材に連結したシャフトを備えた軸受装置において、前記シャフトの外周面にブーツの一端部を付設すると共に、前記内方部材の外周面に前記ブーツの他端部を付設し、かつ、そのブーツの他端部に前記外方部材の内周面に対向するシールリップを設けたものである。   The invention according to claim 2 comprises an outer member having an outer rolling surface formed on the inner periphery and an outer joint member of a constant velocity universal joint, and an inner rolling surface facing the outer rolling surface on the outer periphery. A bearing device comprising a formed inner member, a rolling element that is rotatably mounted between both rolling surfaces of the outer member and the inner member, and a shaft that is connected to an inner joint member of the constant velocity universal joint. In addition, one end of the boot is attached to the outer peripheral surface of the shaft, the other end of the boot is attached to the outer peripheral surface of the inner member, and the inner end of the outer member is attached to the other end of the boot. A seal lip facing the peripheral surface is provided.

ブーツの端部（他端部）に設けたシールリップによって、外方部材と内方部材の間に水や埃が侵入することを防止することができる。すなわち、端部にシールリップを有するブーツが、等速自在継手用の防塵カバー部材の役割と、転がり軸受用のシール材の役割を兼ねることができる。   The seal lip provided at the end (other end) of the boot can prevent water and dust from entering between the outer member and the inner member. In other words, the boot having the seal lip at the end can serve both as a dustproof cover member for a constant velocity universal joint and as a sealant for a rolling bearing.

請求項３の発明は、請求項２に記載の軸受装置において、前記ブーツの前記内方部材への取付部の外径寸法を、前記外方部材の車輌ナックル部に挿通する部分の外径寸法より小さく設定したものである。このように設定したことで、この軸受装置を車輌ナックル部に挿通し車輌に容易に組みつけることができる。   According to a third aspect of the present invention, in the bearing device according to the second aspect, the outer diameter of the portion of the outer member attached to the inner member of the boot is inserted into the vehicle knuckle portion of the outer member. It is set smaller. With this setting, the bearing device can be inserted into the vehicle knuckle portion and easily assembled to the vehicle.

本発明の軸受装置によれば、端部にシールリップを有するブーツが、等速自在継手用の防塵カバー部材の役割と、転がり軸受用のシール材の役割を兼ねることができる。つまり、従来のブーツと転がり軸受用のシール材を一体化した構造とすることで、部品点数を少なくすることができる。したがって、製造コストを削減することができると共に、組付け作業性・分解作業性が向上するものとなる。   According to the bearing device of the present invention, the boot having the seal lip at the end can serve both as a dustproof cover member for a constant velocity universal joint and as a sealant for a rolling bearing. That is, the number of parts can be reduced by adopting a structure in which a conventional boot and a seal material for a rolling bearing are integrated. Therefore, the manufacturing cost can be reduced, and the assembly workability and disassembly workability can be improved.

以下、本発明の実施の形態について添付図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

図１は本発明の第１実施形態を示す縦断面図である。本発明は例えば自動車の車輪用軸受装置であって、同図に示すように、自動車の車輪を回転自在に支持するハブユニットＵと、それに連動連結した等速自在継手４を備える。なお、以下の説明においては、この軸受装置を車両に組付けた状態で、車両の外側寄りとなる側をアウトボード側といい、図１では左側がアウトボード側となる。一方、車両の中央寄りとなる側をインボード側といい、同図では右側がインボード側となる。   FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention. The present invention is, for example, a vehicle wheel bearing device, and includes a hub unit U that rotatably supports a vehicle wheel and a constant velocity universal joint 4 linked to the hub unit U, as shown in FIG. In the following description, the side closer to the outside of the vehicle with the bearing device assembled to the vehicle is referred to as the outboard side, and the left side in FIG. 1 is the outboard side. On the other hand, the side closer to the center of the vehicle is called the inboard side, and in FIG.

ハブユニットＵは、外方部材１と内方部材２と複列の転動体３３，３３を主要な構成要素とし、外方部材１の内周面と内方部材２の外周面とそれらの間に転動自在に収納した転動体３３にて転がり軸受３を構成している。   The hub unit U includes the outer member 1, the inner member 2, and double-row rolling elements 33, 33 as main components, and the inner peripheral surface of the outer member 1, the outer peripheral surface of the inner member 2, and the space between them. The rolling bearing 3 is composed of rolling elements 33 housed in a freely rotatable manner.

外方部材１は、外周に車体（図示せず）に取り付けるための車体取付フランジ１ａを有し、内周には複列の外側転走面１ｂ，１ｂが形成されている。   The outer member 1 has a vehicle body mounting flange 1a for mounting to a vehicle body (not shown) on the outer periphery, and double row outer rolling surfaces 1b and 1b are formed on the inner periphery.

一方、内方部材２は、アウトボード側のハブ輪６とインボード側の軸状のステム部７を一体に有する本体部１０と、本体部１０の中間部外周に嵌合された嵌合部１１とから成る。嵌合部１１は本体部１０の端部に形成された雄ねじに、ナット１２を螺合させて取り付けられている。ハブ輪６は車輪（図示せず）を取り付けるための車輪取付フランジ６ａを有し、その円周等配位置にハブボルト８を植設している。   On the other hand, the inner member 2 includes a main body portion 10 integrally including an outboard-side hub wheel 6 and an inboard-side shaft-like stem portion 7, and a fitting portion fitted to the outer periphery of the intermediate portion of the main body portion 10. 11 and. The fitting portion 11 is attached by screwing a nut 12 to a male screw formed at an end portion of the main body portion 10. The hub wheel 6 has a wheel mounting flange 6a for mounting a wheel (not shown), and hub bolts 8 are implanted at circumferentially equidistant positions.

また、内方部材２の外周には上記外側転走面１ｂ，１ｂと対向する内側転走面２ａ，２ｂが形成され、一方の内側転走面２ａは本体部１０の外周に形成し、他方の内側転走面２ｂは嵌合部１１の外周に形成してある。   In addition, inner rolling surfaces 2a and 2b facing the outer rolling surfaces 1b and 1b are formed on the outer periphery of the inner member 2, and one inner rolling surface 2a is formed on the outer periphery of the main body 10 and the other. The inner rolling surface 2 b is formed on the outer periphery of the fitting portion 11.

外方部材１と内方部材２の両転走面１ｂ，１ｂ，２ａ，２ｂ間には転動体３３を収容し、転動体３３は保持器９にて転動自在に保持されている。また、ナット１２を締め付けて本体部１０と嵌合部１１を突き合わせることにより、転がり軸受３内部に予圧を与えている。   A rolling element 33 is accommodated between the rolling surfaces 1 b, 1 b, 2 a, 2 b of the outer member 1 and the inner member 2, and the rolling element 33 is held by a cage 9 so as to be freely rollable. Further, a preload is applied to the inside of the rolling bearing 3 by tightening the nut 12 and butting the main body portion 10 and the fitting portion 11 together.

等速自在継手４は、外輪１３と内輪１４とトルク伝達ボール１５とケージ１６を備える。外側継手部材としての外輪１３はベル型で、閉じた端部側に軸部１７を一体に設けてある。また、内側継手部材としての内輪１４は、内周にスプライン２０を有し、そのスプライン２０に上記内方部材２のステム部７を連結している。外輪１３の内周と内輪１４の外周には、それぞれボール溝１９，２２が形成され、対を成す両ボール溝１９，２２にて形成されたトラックに１個のトルク伝達ボール１５が組み込まれている。そして、ボール１５はケージ１６によって転動自在に保持されている。   The constant velocity universal joint 4 includes an outer ring 13, an inner ring 14, a torque transmission ball 15, and a cage 16. The outer ring 13 as an outer joint member is bell-shaped, and a shaft portion 17 is integrally provided on the closed end side. The inner ring 14 as the inner joint member has a spline 20 on the inner periphery, and the stem portion 7 of the inner member 2 is connected to the spline 20. Ball grooves 19 and 22 are formed on the inner periphery of the outer ring 13 and the outer periphery of the inner ring 14, respectively, and one torque transmission ball 15 is incorporated in a track formed by the pair of ball grooves 19 and 22. Yes. And the ball | bowl 15 is hold | maintained by the cage 16 so that rolling is possible.

外輪１３の開口端部はゴム又は樹脂を含む柔軟性の素材から成る蛇腹状のブーツ５で覆われ、そのブーツ５の一端部（インボード側の端部）を外輪１３の外周面にバンド部材２５にて締め付けて固定している。また、ブーツ５の他端部（アウトボード側の端部）は内方部材２の外周面にバンド部材２６にて締め付けて取り付けられ、そのブーツ５の他端縁（他端部の端縁）５ａは転がり軸受３のインボード側開口端２７ａ内に配置されている。すなわち、ブーツ５は等速自在継手４と内方部材２に渡って付設されているので、ブーツ５は等速自在継手４及び内方部材２と供回りするようになっている。   The opening end portion of the outer ring 13 is covered with a bellows-like boot 5 made of a flexible material including rubber or resin, and one end portion (end portion on the inboard side) of the boot 5 is attached to the outer peripheral surface of the outer ring 13 as a band member. Tightened with 25 and fixed. The other end of the boot 5 (the end on the outboard side) is attached to the outer peripheral surface of the inner member 2 by fastening with a band member 26, and the other end of the boot 5 (the end of the other end) 5 a is arranged in the inboard side opening end 27 a of the rolling bearing 3. That is, since the boot 5 is provided over the constant velocity universal joint 4 and the inner member 2, the boot 5 is configured to rotate with the constant velocity universal joint 4 and the inner member 2.

図２（ａ）は、転がり軸受３のインボード側開口端２７ａ内に配置されたブーツ５の他端縁５ａとその周辺の拡大図であり、同図に示すように、ブーツ５の他端縁５ａには、外方部材１の（インボード側の）内周面１ｃに対向するシールリップ２８を設け、シールリップ２８は外方部材１の内周面１ｃに形成した段差部３０より開口端２７ａ側に配置されている。このシールリップ２８は二股状のダブルリップ部２８ａ，２８ｂを有し、各リップ部２８ａ，２８ｂは、外方部材１の端部内周面１ｃと微小隙間を隔てて非接触状に設けられている。また、ブーツ５の他端縁５ａには断面Ｌ字形の芯金２９を固着している。本図では、外方部材１の内周面１ｃとダブルリップ部２８ａ，２８ｂとの間に微小隙間を設けているが、密封性を高めるためにダブルリップ部２８ａ，２８ｂを外方部材１の内周面１ｃに接触させてもよい。   FIG. 2A is an enlarged view of the other end edge 5a of the boot 5 disposed in the inboard side opening end 27a of the rolling bearing 3 and its surroundings. As shown in FIG. The edge 5a is provided with a seal lip 28 that opposes the inner peripheral surface 1c (on the inboard side) of the outer member 1, and the seal lip 28 opens from a step portion 30 formed on the inner peripheral surface 1c of the outer member 1. It arrange | positions at the end 27a side. The seal lip 28 has bifurcated double lip portions 28a and 28b, and the lip portions 28a and 28b are provided in a non-contact manner with a small gap from the end inner peripheral surface 1c of the outer member 1. . A core metal 29 having an L-shaped cross section is fixed to the other end edge 5 a of the boot 5. In this figure, a minute gap is provided between the inner peripheral surface 1c of the outer member 1 and the double lip portions 28a, 28b. However, the double lip portions 28a, 28b are attached to the outer member 1 in order to improve the sealing performance. You may make it contact the inner peripheral surface 1c.

図２（ｂ）は、外方部材１の他の実施形態を示し、この場合は、外方部材１のインボード側の内周面１ｃに段差部３０から開口端２７ａ側へ角型の溝部３１を連設し、この溝部３１にシールリップ２８（リップ部２８ａ，２８ｂ）が非接触状態で収容される。図２（ｂ）に示すような構造とすることで、転がり軸受３内部（転動体側）への水や埃の侵入をより効果的に阻止することができる。なお、図２（ｂ）において、図２（ａ）と同一の符号は図２（ａ）と同様の構成であるので説明を省略する。   FIG. 2B shows another embodiment of the outer member 1, and in this case, a rectangular groove portion from the step portion 30 to the opening end 27 a side on the inner peripheral surface 1 c on the inboard side of the outer member 1. 31 is continuously provided, and the seal lip 28 (lip portions 28a and 28b) is accommodated in the groove portion 31 in a non-contact state. By adopting a structure as shown in FIG. 2B, it is possible to more effectively prevent water and dust from entering the inside of the rolling bearing 3 (the rolling element side). In FIG. 2B, the same reference numerals as those in FIG. 2A have the same configurations as those in FIG.

また、図１において、転がり軸受３のアウトボード側の開口端２７ｂには、芯金にゴムシールを加硫接着した環状のシール材３２を設けている。このように、転がり軸受３の両開口端２７ａ，２７ｂに、シールリップ２８とシール材３２を内装することで、転がり軸受３内へ水や埃が侵入するのを防止している。   Further, in FIG. 1, an annular sealing material 32 in which a rubber seal is vulcanized and bonded to a core metal is provided at the opening end 27 b on the outboard side of the rolling bearing 3. As described above, the seal lip 28 and the seal material 32 are provided in the both opening ends 27 a and 27 b of the rolling bearing 3, thereby preventing water and dust from entering the rolling bearing 3.

次に、本発明の第２実施形態について、図３の縦断面図を参照して説明する。第２実施形態の軸受装置は、ハブ輪６と等速自在継手４と転がり軸受３をユニット化したハブユニットＵを備えている。なお、以下の説明では、上述した第１実施形態の場合と同様に、車両に組付けた状態で車両の外側寄り（図面左側）となる側をアウトボード側、中央寄り側（図面右側）をインボード側という。   Next, a second embodiment of the present invention will be described with reference to the longitudinal sectional view of FIG. The bearing device of the second embodiment includes a hub unit U in which the hub wheel 6, the constant velocity universal joint 4, and the rolling bearing 3 are unitized. In the following description, as in the case of the first embodiment described above, the side closer to the outside of the vehicle (left side of the drawing) when mounted on the vehicle is the outboard side, and the side closer to the center (right side of the drawing). The inboard side.

等速自在継手４は、外側継手部材としての外輪１３と、内側継手部材としての内輪１４と、複数個のトルク伝達ボール１５と、ケージ１６を備えている。外輪１３は、カップ状のマウス部３４と、マウス部３４の底部を成す肩部３５と、肩部３５から軸線方向に延びる軸部３６を有し、マウス部３４の内周にはボール溝１９が形成されている。   The constant velocity universal joint 4 includes an outer ring 13 as an outer joint member, an inner ring 14 as an inner joint member, a plurality of torque transmission balls 15, and a cage 16. The outer ring 13 includes a cup-shaped mouth portion 34, a shoulder portion 35 that forms the bottom of the mouth portion 34, and a shaft portion 36 that extends in the axial direction from the shoulder portion 35. Is formed.

内輪１４はその外周に外輪１３のボール溝１９と対を成すボール溝２２が形成され、外輪１３・内輪１４の両ボール溝１９，２２の間にトルク伝達ボール１５がケージ１６にて転動自在に保持されている。また、内輪１４は内周にスプライン２０を有し、そのスプライン２０にシャフト１８の端部を挿嵌している。   A ball groove 22 that forms a pair with the ball groove 19 of the outer ring 13 is formed on the outer periphery of the inner ring 14, and the torque transmitting ball 15 is freely rollable by the cage 16 between the ball grooves 19, 22 of the outer ring 13 and the inner ring 14. Is held in. The inner ring 14 has a spline 20 on the inner periphery, and the end of the shaft 18 is inserted into the spline 20.

転がり軸受３は、外方部材１の内周面と内方部材２の外周面とそれらの間に転動自在に収納された複列の転動体３３，３３から成る。外方部材１は、外周に車体取付フランジ１ａを一体に有し、内周には複列の外側転走面１ｂ，１ｂが形成されている。一方、内方部材２は、車輪取付フランジ６ａを有するハブ輪６と等速自在継手４の外輪１３とを一体化した部材であり、その外周に上記外方部材１の外側転走面１ｂ，１ｂに対向する内側転走面２ａ，２ｂが形成されている。   The rolling bearing 3 includes an inner circumferential surface of the outer member 1, an outer circumferential surface of the inner member 2, and double-row rolling elements 33 and 33 accommodated so as to be able to roll between them. The outer member 1 integrally has a vehicle body mounting flange 1a on the outer periphery, and double rows of outer rolling surfaces 1b and 1b are formed on the inner periphery. On the other hand, the inner member 2 is a member in which the hub wheel 6 having the wheel mounting flange 6a and the outer ring 13 of the constant velocity universal joint 4 are integrated, and the outer rolling surface 1b of the outer member 1 is formed on the outer periphery thereof. Inner rolling surfaces 2a and 2b facing 1b are formed.

詳しくは、ハブ輪６に外輪１３の軸部３６を圧嵌合して一体状に組付けされて内方部材２を構成し、複列の内側転走面２ａ，２ｂのうち、アウトボード側の内側転走面２ａがハブ輪６の外周に形成され、インボード側の内側転走面２ｂが外輪１３の外周に形成されている。そして、複列の転動体３３，３３がこれら両転走面１ｂ，１ｂ，２ａ，２ｂ間に収容され、各転動体３３は保持器９にて転動自在に保持する。ハブ輪６と外輪１３を突き合わせることにより、転がり軸受３内部に予圧を与えている。   Specifically, the shaft portion 36 of the outer ring 13 is press-fitted to the hub wheel 6 to be integrally assembled to constitute the inner member 2, and the outboard side of the double row inner rolling surfaces 2a and 2b. The inner rolling surface 2 a is formed on the outer periphery of the hub wheel 6, and the inner rolling surface 2 b on the inboard side is formed on the outer periphery of the outer ring 13. The double-row rolling elements 33 and 33 are accommodated between the rolling surfaces 1b, 1b, 2a and 2b, and the rolling elements 33 are held by the cage 9 so as to be freely rollable. A preload is applied to the inside of the rolling bearing 3 by abutting the hub ring 6 and the outer ring 13 together.

外輪１３の開口端部は柔軟性を有する蛇腹状のブーツ５で覆われ、そのブーツ５の一端部（インボード側の端部）をシャフト１８の外周面にバンド部材２５にて締め付けて固定している。ブーツ５の他端部（アウトボード側の端部）は内方部材２の外周面にバンド部材２６にて締め付けて取り付けられ、そのブーツ５の他端縁（他端部の端縁）５ａは転がり軸受３のインボード側開口端２７ａ内に配置されている。そして、ブーツ５は内方部材２及びシャフト１８と供回りするようになっている。   The opening end portion of the outer ring 13 is covered with a flexible bellows-like boot 5, and one end portion (end portion on the inboard side) of the boot 5 is fastened and fixed to the outer peripheral surface of the shaft 18 with a band member 25. ing. The other end (the end on the outboard side) of the boot 5 is attached to the outer peripheral surface of the inner member 2 by fastening with a band member 26, and the other end edge (end edge of the other end) 5a of the boot 5 is It is arranged in the inboard side opening end 27 a of the rolling bearing 3. The boot 5 is adapted to rotate with the inner member 2 and the shaft 18.

ブーツ５の他端縁５ａとその周辺の構造は、図２（ａ）又は（ｂ）で説明したのと同様の構造であり、すなわちブーツ５の他端縁５ａには外方部材１の内周面１ｃと対向するシールリップ２８が設けられている。また、転がり軸受３のアウトボード側の開口端２７ｂには、芯金にゴムシールを加硫接着した環状のシール材３２を設けている。   The other end edge 5a of the boot 5 and its peripheral structure are the same as those described with reference to FIG. 2A or 2B. That is, the other end edge 5a of the boot 5 A seal lip 28 facing the peripheral surface 1c is provided. In addition, an annular sealing member 32 in which a rubber seal is vulcanized and bonded to a core metal is provided at the opening end 27 b on the outboard side of the rolling bearing 3.

また、この軸受装置を車輌ナックル部に挿通し車輌に容易に組みつけられるように、ブーツ５の内方部材２への取付部の外径寸法Ｄ１を、外方部材１の車輌ナックル部に嵌合する部分の外径寸法Ｄ２より小さく設定している。また、図１のような構造においても同様に、ブーツ５の等速自在継手４への取付部の外径寸法を、外方部材１の車輌ナックル部に嵌合する部分の外径寸法より小さく設定している。   Further, the outer diameter D1 of the attachment portion of the boot 5 to the inner member 2 is fitted to the vehicle knuckle portion of the outer member 1 so that the bearing device can be inserted into the vehicle knuckle portion and easily assembled to the vehicle. It is set smaller than the outer diameter D2 of the mating portion. Similarly, in the structure as shown in FIG. 1, the outer diameter of the mounting portion of the boot 5 to the constant velocity universal joint 4 is smaller than the outer diameter of the portion of the outer member 1 that fits into the vehicle knuckle portion. It is set.

本発明は上述の実施形態に限定されるものではなく、等速自在継手と転がり軸受を備えるものであって、その等速自在継手に付設したブーツと転がり軸受の開口端に内装されるシール材を一体化可能な構造のものであれば適用することができる。
また、図２に示すシールリップ２８の形状も、本発明の要旨を逸脱しない範囲で種々の変更を加え得ることは勿論である。 The present invention is not limited to the above-described embodiment, and includes a constant velocity universal joint and a rolling bearing, and includes a boot attached to the constant velocity universal joint and a sealing material provided in an opening end of the rolling bearing. As long as the structure can be integrated, it can be applied.
Also, the shape of the seal lip 28 shown in FIG. 2 can of course be variously modified without departing from the gist of the present invention.

本発明に係る軸受装置の第１実施形態を示す縦断面図である。It is a longitudinal section showing a 1st embodiment of a bearing device concerning the present invention. 前記図１の要部拡大断面図であって、（ａ）は要部の実施の一形態を示す拡大断面図、（ｂ）は要部の他の実施形態を示す拡大図である。FIG. 2 is an enlarged cross-sectional view of a main part of FIG. 1, wherein (a) is an enlarged cross-sectional view showing an embodiment of the main part, and (b) is an enlarged view showing another embodiment of the main part. 本発明の軸受装置の第２実施形態を示す縦断面図である。It is a longitudinal cross-sectional view which shows 2nd Embodiment of the bearing apparatus of this invention.

符号の説明Explanation of symbols

１ 外方部材
１ｂ 外側転走面
１ｃ 内周面
２ 内方部材
２ａ 内側転走面
２ｂ 内側転走面
４ 等速自在継手
５ ブーツ
７ ステム部
１３ 外側継手部材
１４ 内側継手部材
１８ シャフト
２８ シールリップ
３３ 転動体 DESCRIPTION OF SYMBOLS 1 Outer member 1b Outer rolling surface 1c Inner peripheral surface 2 Inner member 2a Inner rolling surface 2b Inner rolling surface 4 Constant velocity universal joint 5 Boot 7 Stem part 13 Outer joint member 14 Inner joint member 18 Shaft 28 Seal lip 33 Rolling elements

Claims (3)

内周に外側転走面を形成した外方部材と、軸状のステム部を有すると共に外周に前記外側転走面と対向する内側転走面を形成した内方部材と、前記外方部材と内方部材の両転走面間に転動自在に内装した転動体と、前記内方部材のステム部と連結した等速自在継手を備えた軸受装置において、
前記等速自在継手の外側継手部材の外周面にブーツの一端部を付設すると共に、前記内方部材の外周面に前記ブーツの他端部を付設し、かつ、そのブーツの他端部に前記外方部材の内周面に対向するシールリップを設けたことを特徴とする軸受装置。 An outer member having an outer rolling surface formed on the inner periphery, an inner member having an axial stem portion and an inner rolling surface facing the outer rolling surface on the outer periphery, and the outer member In a bearing device comprising a rolling element that is slidably mounted between both rolling surfaces of the inner member, and a constant velocity universal joint that is connected to the stem portion of the inner member,
One end of the boot is attached to the outer peripheral surface of the outer joint member of the constant velocity universal joint, the other end of the boot is attached to the outer peripheral surface of the inner member, and the other end of the boot is A bearing device comprising a seal lip facing the inner peripheral surface of the outer member. 内周に外側転走面を形成した外方部材と、等速自在継手の外側継手部材を一体に有すると共に外周に前記外側転走面と対向する内側転走面を形成した内方部材と、前記外方部材と内方部材の両転走面間に転動自在に内装した転動体と、前記等速自在継手の内側継手部材に連結したシャフトを備えた軸受装置において、
前記シャフトの外周面にブーツの一端部を付設すると共に、前記内方部材の外周面に前記ブーツの他端部を付設し、かつ、そのブーツの他端部に前記外方部材の内周面に対向するシールリップを設けたことを特徴とする軸受装置。 An outer member formed with an outer rolling surface on the inner periphery, and an inner member formed integrally with an outer joint member of a constant velocity universal joint and formed with an inner rolling surface facing the outer rolling surface on the outer periphery; In a bearing device comprising a rolling element that is slidably mounted between both rolling surfaces of the outer member and the inner member, and a shaft connected to an inner joint member of the constant velocity universal joint,
One end of the boot is attached to the outer peripheral surface of the shaft, the other end of the boot is attached to the outer peripheral surface of the inner member, and the inner peripheral surface of the outer member is attached to the other end of the boot. A bearing device characterized in that a seal lip is provided opposite to the lip. 前記ブーツの前記内方部材への取付部の外径寸法を、前記外方部材の車輌ナックル部に挿通する部分の外径寸法より小さく設定したことを特徴とする請求項２に記載の軸受装置。   3. The bearing device according to claim 2, wherein an outer diameter dimension of an attachment portion of the boot to the inner member is set smaller than an outer diameter dimension of a portion of the outer member that is inserted into a vehicle knuckle portion. .
JP2006301681A 2006-11-07 2006-11-07 Bearing device Withdrawn JP2008115998A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017038890A1 (en) * 2015-08-31 2017-03-09 Ntn株式会社 Bearing device for vehicle wheel
WO2017091071A1 (en) * 2015-11-27 2017-06-01 Itrec B.V. Sealed rolling elements bearing
KR102130247B1 (en) * 2019-04-16 2020-07-03 현대위아 주식회사 Vehicle drive axle with drag torque reduction function
WO2021010733A1 (en) * 2019-07-15 2021-01-21 현대위아 주식회사 Hub-integrated-type constant-velocity joint device
WO2025109675A1 (en) * 2023-11-21 2025-05-30 株式会社ジェイテクト Drive shaft for vehicle

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017038890A1 (en) * 2015-08-31 2017-03-09 Ntn株式会社 Bearing device for vehicle wheel
US10479139B2 (en) 2015-08-31 2019-11-19 Ntn Corporation Wheel bearing apparatus
WO2017091071A1 (en) * 2015-11-27 2017-06-01 Itrec B.V. Sealed rolling elements bearing
KR102130247B1 (en) * 2019-04-16 2020-07-03 현대위아 주식회사 Vehicle drive axle with drag torque reduction function
WO2021010733A1 (en) * 2019-07-15 2021-01-21 현대위아 주식회사 Hub-integrated-type constant-velocity joint device
KR20210008734A (en) * 2019-07-15 2021-01-25 현대위아 주식회사 Hub built-in type constant velocity joint apparatus
KR102239252B1 (en) * 2019-07-15 2021-04-12 현대위아(주) Hub built-in type constant velocity joint apparatus
US20220258530A1 (en) * 2019-07-15 2022-08-18 Hyundai Wia Corporation Hub- integrated-type constant-velocity joint device
US12220942B2 (en) * 2019-07-15 2025-02-11 Hyundai Wia Corporation Hub-integrated-type constant-velocity joint device
WO2025109675A1 (en) * 2023-11-21 2025-05-30 株式会社ジェイテクト Drive shaft for vehicle

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