JP2008045649A - Bearing device for axle - Google Patents

Bearing device for axle Download PDF

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Publication number
JP2008045649A
JP2008045649A JP2006220923A JP2006220923A JP2008045649A JP 2008045649 A JP2008045649 A JP 2008045649A JP 2006220923 A JP2006220923 A JP 2006220923A JP 2006220923 A JP2006220923 A JP 2006220923A JP 2008045649 A JP2008045649 A JP 2008045649A
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Prior art keywords
inner ring
shaft
side inner
press
fitted
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JP2006220923A
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Japanese (ja)
Inventor
Shigeru Inoue
茂 井上
Yoichi Tsuzaki
洋一 津崎
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JTEKT Corp
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JTEKT Corp
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Priority to JP2006220923A priority Critical patent/JP2008045649A/en
Publication of JP2008045649A publication Critical patent/JP2008045649A/en
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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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/10—Force connections, e.g. clamping
    • 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
    • F16C2229/00—Setting preload
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/70—Diameters; Radii
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Support Of The Bearing (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for an axle capable of preventing backlash or creeping by substantially equalizing preloads applied to an inner side inner ring and an outer side inner ring of a bearing unit pressed in with a cylinder shaft of a hub shaft, and increasing a fixing force of an inner wheel. <P>SOLUTION: A flange 3 is attached with a wheel on an outer side, the hub shaft 2 is provided with the cylinder shaft 5 at the inner side of the flange 3, and the bearing unit 10 is comprised of an inner ring 11 and an outer ring 13 comprised of the inner side inner ring 12a and the outer side inner ring 12b, and rolling elements 14 arranged between the rings. The inner ring 11 is pressed in the cylinder shaft 5 of the hub shaft 2. The interference of cylinder shaft 5 and the outer side inner ring 12b fit therein is set larger than the interference of the cylinder shaft 5 and the inner side inner ring 12a fit therein. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、ハブシャフトに軸受ユニットを取付けた自動車等の車軸用軸受装置に関するものである。   The present invention relates to a bearing device for an axle of an automobile or the like in which a bearing unit is attached to a hub shaft.

従来の車軸用軸受装置に、車輪が取付けられるフランジと軸受ユニットが取付けられる軸とからなるハブシャフトと、それぞれ転送面を有する第１，第２の内輪、これら内輪の転送面に対応して転送面が設けられた外輪、及び第１，第２の内輪と外輪の転送面の間にそれぞれ配設された複数のころからなる軸受ユニットとを有し、この軸受ユニットをハブシャフトの軸に圧入し、その第１の内輪をハブシャフトに設けかしめ部でかしめて一体化したものがある（例えば、特許文献１参照）。   Transfer to a conventional axle bearing device corresponding to a hub shaft comprising a flange to which wheels are attached and a shaft to which a bearing unit is attached, first and second inner rings each having a transfer surface, and transfer surfaces of these inner rings. And an outer ring having a surface and a bearing unit comprising a plurality of rollers disposed between the transfer surfaces of the first and second inner rings and the outer ring, and press-fitting the bearing unit into the shaft of the hub shaft. In some cases, the first inner ring is integrated on the hub shaft by caulking (see, for example, Patent Document 1).

特開２０００−２８９４０３号公報（第３−５頁、図１）JP 2000-289403 A (page 3-5, FIG. 1)

特許文献１のような車軸用軸受装置においては、軸受ユニットはかしめ部によりかしめられることにより、第１の内輪のみに軸力がかかり、フランジ側の第２の内輪には軸力があまり伝わらないため、予圧不足によりガタが生じたりクリープが発生し易いという問題があった。   In the axle bearing device as disclosed in Patent Document 1, the bearing unit is caulked by the caulking portion, whereby an axial force is applied only to the first inner ring, and the axial force is not transmitted to the second inner ring on the flange side. For this reason, there has been a problem that rattling or creep is likely to occur due to insufficient preload.

本発明は、上記の課題を解決するためになされたもので、ハブシャフトの円筒軸に圧入した軸受ユニットのインナ側内輪とアウタ側内輪にかかる予圧をほぼ等しくすることにより、内輪の固定力を大きくしてガタやクリープの発生を防止することのできる車軸用軸受装置を提供することを目的としたものである。   The present invention has been made in order to solve the above-described problem, and by making the preload applied to the inner side inner ring and the outer side inner ring of the bearing unit press-fitted into the cylindrical shaft of the hub shaft substantially equal, It is an object of the present invention to provide an axle bearing device that can be increased to prevent the occurrence of play and creep.

本発明に係る車軸用軸受装置は、アウタ側に車輪が取付けられるフランジを有し、該フランジのインナ側に円筒軸が設けられたハブシャフトと、インナ側内輪及びアウタ側内輪からなる内輪と外輪とこれら両者の間に配設された転動体とからなり、前記内輪がハブシャフトの円筒軸に圧入される軸受ユニットとを備え、前記円筒軸とこれに圧入されるアウタ側内輪の締めしろを、前記円筒軸とこれに圧入されるインナ側内輪の締めしろより大きく設定したものである。   An axle bearing device according to the present invention has a flange on which a wheel is mounted on the outer side, a hub shaft provided with a cylindrical shaft on the inner side of the flange, an inner ring and an outer ring including an inner side inner ring and an outer side inner ring. And a rolling unit disposed between them, and the inner ring is provided with a bearing unit that is press-fitted into the cylindrical shaft of the hub shaft, and a fastening margin between the cylindrical shaft and the outer-side inner ring that is press-fitted into the cylindrical shaft is provided. The cylinder shaft and the inner side inner ring press-fitted into the cylindrical shaft are set to be larger than the allowance.

また、上記の車軸用軸受装置のハブシャフトの円筒軸の軸受ユニットのアウタ側内輪が圧入される部分の外径を、前記インナ側内輪が圧入される部分の外径より大径に形成したものである。   Further, the outer diameter of the portion into which the outer side inner ring of the cylindrical shaft bearing unit of the hub shaft of the axle shaft bearing device is press-fitted is made larger than the outer diameter of the portion into which the inner side inner ring is press-fitted. It is.

また、上記の車軸用軸受装置の円筒軸に圧入される軸受ユニットのアウタ側内輪の内径を、前記インナ側内輪の内径より小径に形成したものである。   Further, the inner diameter of the outer side inner ring of the bearing unit press-fitted into the cylindrical shaft of the axle bearing device is formed smaller than the inner diameter of the inner side inner ring.

本発明によれば、ハブシャフトの円筒軸に圧入した軸受ユニットのインナ側内輪と、アウタ側内輪にかかる予圧がほぼ等しくなり、はめ合いによるすき間減少量及び円筒軸への内輪の固定力を大きくすることができるので、内輪のガタやクリープの発生を防止することができる。   According to the present invention, the preload applied to the inner side inner ring of the bearing unit press-fitted into the cylindrical shaft of the hub shaft and the outer side inner ring is substantially equal, and the clearance reduction amount due to fitting and the fixing force of the inner ring to the cylindrical shaft are increased. Therefore, it is possible to prevent the inner ring from rattling or creeping.

［実施の形態１］
図１は本発明の実施の形態１に係る車軸用軸受装置の組立後の状態を示す縦断面図である。なお、以下の説明では、図の左側（車輪が取付けられる側）をアウタ側、右側をインナ側という。
図において、１は車軸用軸受装置で、鋼材からなるハブシャフト２のアウタ側には、車輪（図示せず）を取付けるためのボルト９が圧入される複数のボルト穴４を有する円盤状のフランジ３が設けられており、フランジ３の中心部にはインナ側に突出し、後述の軸受ユニット１０が組付けられる円筒軸５が設けられている。なお、円筒軸５のインナ側の端部には、軸受ユニット１０を固定するためのかしめ部７（破線で示す）が突設されている。 [Embodiment 1]
1 is a longitudinal sectional view showing a state after the assembly of an axle bearing device according to Embodiment 1 of the present invention. In the following description, the left side (the side on which the wheel is attached) is referred to as the outer side, and the right side is referred to as the inner side.
In the figure, reference numeral 1 denotes an axle bearing device, and a disc-shaped flange having a plurality of bolt holes 4 into which bolts 9 for mounting wheels (not shown) are press-fitted on the outer side of a hub shaft 2 made of steel. 3 is provided, and a cylindrical shaft 5 is provided at the center of the flange 3 so as to project toward the inner side and to which a bearing unit 10 described later is assembled. A caulking portion 7 (shown by a broken line) for fixing the bearing unit 10 projects from the inner end of the cylindrical shaft 5.

軸受ユニット１０は、インナ側内輪１２ａとアウタ側内輪１２ｂとからなり、それぞれ両端部に設けた鍔部の間に転走面（軌道面）が形成された内輪１１と、内輪１１の転走面に対応して２列の転走面が設けられた外輪１３と、内輪１１と外輪１３の転走面の間に配設された転動体である複数の円錐ころ１４とからなっている。
この軸受ユニット１０は、内輪１１がハブシャフト２の円筒軸５の外周面に圧入され、かしめ部７を実線で示すように外周方向に折曲げて内輪１１をかしめることにより、円筒軸５のアウタ側に設けた段部８との間に保持され、外輪１３が外周に設けたフランジ１５を介して車軸ケース等（図示せず）に回転不能に固定される。なお、１６は軸受ユニット１０の外輪１３のアウタ側んい圧入された芯金と、そのアウタ側に設けられてフランジ３のインナ側の面に摺接するリップとからなる外側ダストシールである。 The bearing unit 10 includes an inner-side inner ring 12a and an outer-side inner ring 12b, and an inner ring 11 in which a rolling surface (track surface) is formed between flanges provided at both ends, and a rolling surface of the inner ring 11 Corresponding to the outer ring 13 provided with two rows of rolling surfaces, and a plurality of tapered rollers 14 which are rolling elements disposed between the rolling surfaces of the inner ring 11 and the outer ring 13.
In the bearing unit 10, the inner ring 11 is press-fitted into the outer peripheral surface of the cylindrical shaft 5 of the hub shaft 2, and the inner ring 11 is caulked by bending the caulking portion 7 in the outer peripheral direction as indicated by a solid line. The outer ring 13 is held between a stepped portion 8 provided on the outer side, and is fixed to an axle case or the like (not shown) through a flange 15 provided on the outer periphery so as not to rotate. Reference numeral 16 denotes an outer dust seal comprising a core metal that is press-fitted on the outer side of the outer ring 13 of the bearing unit 10 and a lip that is provided on the outer side and that slidably contacts the inner surface of the flange 3.

図２は図１のハブシャフトの中心部から一方の側を示す断面図、図３は同じく軸受ユニットの断面図である。なお、以下の説明では、図面の一部を誇張して示してある。
本実施の形態においては、図２に示すように、ハブシャフト２の円筒軸５の外径を、軸受ユニット１０のインナ側内輪１２ａが圧入される部分６ａの外径Ｄに対して、アウタ側内輪１２ｂが圧入される部分６ｂの外径Ｄ1を大きく、Ｄ＜Ｄ1に形成したものである。この場合、円筒軸５のインナ側内輪１２ａが圧入される部分６ａの外径Ｄは通常の大きさで、アウタ側内輪１２ｂが圧入される部分６ｂの外径Ｄ１は、ハブシャフト２の大きさや材質によって異なるが、実施例では、インナ側内輪１２ａが圧入される部分６ａの外径Ｄに対して、１０μｍ〜２０μｍ程度大径にした。 2 is a cross-sectional view showing one side from the center of the hub shaft of FIG. 1, and FIG. 3 is a cross-sectional view of the bearing unit. In the following description, a part of the drawings is exaggerated.
In the present embodiment, as shown in FIG. 2, the outer diameter of the cylindrical shaft 5 of the hub shaft 2 is set on the outer side with respect to the outer diameter D of the portion 6a into which the inner side inner ring 12a of the bearing unit 10 is press-fitted. increasing the outer diameter D 1 of the portion 6b of the inner ring 12b is press-fitted, and is formed on the D <D 1. In this case, the outer diameter D of the portion 6a into which the inner side inner ring 12a of the cylindrical shaft 5 is press-fitted is a normal size, and the outer diameter D1 of the portion 6b into which the outer side inner ring 12b is press-fitted is the size of the hub shaft 2. Although different depending on the material, in the embodiment, the diameter was increased by about 10 μm to 20 μm with respect to the outer diameter D of the portion 6 a into which the inner side inner ring 12 a is press-fitted.

一方、軸受ユニット１０は、図３に示すように、インナ側内輪１２ａとアウタ側内輪１２ｂの内径ｄは等しく、ハブシャフト２の円筒軸５のインナ側内輪１２ａが圧入される部分６ａに対応した大きさとなっている。   On the other hand, as shown in FIG. 3, the inner diameter d of the inner side inner ring 12 a and the outer side inner ring 12 b is equal, and the bearing unit 10 corresponds to a portion 6 a into which the inner side inner ring 12 a of the cylindrical shaft 5 of the hub shaft 2 is press-fitted. It is a size.

上記のように構成した本実施の形態においては、ハブシャフト２の円筒軸５に、軸受ユニット１０の内輪１１を圧入し、かしめ部７を外方に折曲げて、内輪１１をかしめ部７と段部８との間に保持する。
このとき、円筒軸５のアウタ側の部分６ｂとアウタ側内輪１２ｂとの締めしろが、円筒軸５のインナ側の部分６ａとインナ側内輪１２ａとの締めしろより大きいので、インナ側内輪１２ａとアウタ側内輪１２ｂの予圧がほぼ等しくなり、はめ合いによるすき間減少量及び内輪１１の固定力が大きくなるためガタを生じることがなく、耐クリープ性を向上させることができる。 In the present embodiment configured as described above, the inner ring 11 of the bearing unit 10 is press-fitted into the cylindrical shaft 5 of the hub shaft 2, the caulking portion 7 is bent outward, and the inner ring 11 is caulked with the caulking portion 7. Hold between the step 8.
At this time, since the interference between the outer side portion 6b of the cylindrical shaft 5 and the outer side inner ring 12b is larger than the interference between the inner side portion 6a of the cylindrical shaft 5 and the inner side inner ring 12a, the inner side inner ring 12a The preload of the outer side inner ring 12b becomes substantially equal, and the clearance reduction amount due to fitting and the fixing force of the inner ring 11 increase, so that no play occurs and creep resistance can be improved.

［実施の形態２］
図４は本発明の実施の形態２に係る車軸用軸受装置のハブシャフトの中心部から一方の側を示す断面図、図５は同じく軸受ユニットの断面図である。
本実施の形態においては、図４に示すように、ハブシャフト２の円筒軸５の外径Ｄは全長に亘って等しく、軸受ユニット１０のインナ側内輪１２ａが圧入される大きさになっている。 [Embodiment 2]
4 is a cross-sectional view showing one side from the center of the hub shaft of the axle bearing device according to Embodiment 2 of the present invention, and FIG. 5 is a cross-sectional view of the bearing unit.
In the present embodiment, as shown in FIG. 4, the outer diameter D of the cylindrical shaft 5 of the hub shaft 2 is the same over the entire length, and the inner side inner ring 12 a of the bearing unit 10 is press-fitted. .

一方、軸受ユニット１０は、図５に示すように、アウタ側内輪１２ｂの内径ｄ1が、インナ側内輪１２ａの内径ｄより小径で、ｄ＞ｄ1に形成されている。この場合、アウタ側内輪１２ｂの内径ｄ1は、ハブシャフト２の大きさや材質等によって異なるが、実施例では、インナ側内輪１２ａの内径ｄより１０μｍ〜２０μｍ程度小径となっている。 On the other hand, as shown in FIG. 5, the bearing unit 10 has an inner diameter d 1 of the outer side inner ring 12 b smaller than an inner diameter d of the inner side inner ring 12 a and d> d 1 . In this case, the inner diameter d 1 of the outer side inner ring 12b varies depending on the size and material of the hub shaft 2, in the embodiment, has a 10μm~20μm about smaller diameter than the inner diameter d of the inner side inner ring 12a.

本実施の形態においても、ハブシャフト２の円筒軸５に軸受ユニット１０を圧入し、かしめ部７によりかしめて段部８との間に保持する。
このとき、円筒軸５とアウタ側内輪１２ｂとの締め代が、円筒軸５とインナ側内輪１２ａとの締め代よろ大きいので、実施の形態１の場合と同様に、インナ側内輪１２ａとアウタ側内輪１２ｂの予圧がほぼ等しくなり、内輪１１の固定力が大きくなるためガタを生ずることがなく、耐クリープ性を向上させることができる。 Also in the present embodiment, the bearing unit 10 is press-fitted into the cylindrical shaft 5 of the hub shaft 2 and is caulked by the caulking portion 7 and held between the stepped portion 8.
At this time, since the tightening allowance between the cylindrical shaft 5 and the outer side inner ring 12b is larger than the tightening allowance between the cylindrical shaft 5 and the inner side inner ring 12a, the inner side inner ring 12a and the outer side are the same as in the first embodiment. Since the preload of the inner ring 12b is substantially equal and the fixing force of the inner ring 11 is increased, there is no backlash and the creep resistance can be improved.

上記の説明では、図示の車軸用軸受装置に本発明を実施した場合を示したが、これに限定するものではなく、本発明の技術思想を逸脱しない範囲で、他の構造の車軸用軸受装置にも本発明を実施することができる。また、軸受ユニット１０の転動体１４は玉軸受であてもよい。   In the above description, the case where the present invention is applied to the illustrated axle bearing device is shown. However, the present invention is not limited to this, and an axle bearing device having another structure is provided without departing from the technical idea of the present invention. The present invention can also be implemented. Further, the rolling element 14 of the bearing unit 10 may be a ball bearing.

本発明の実施の形態１に係る車軸用軸受装置の組立後の状態を示す断面図である。It is sectional drawing which shows the state after the assembly of the axle bearing device which concerns on Embodiment 1 of this invention. 図１のハブシャフトの中心部から一方の側を示す断面図である。It is sectional drawing which shows one side from the center part of the hub shaft of FIG. 図１の軸受ユニットの中心部から一方の側を示す断面図である。It is sectional drawing which shows one side from the center part of the bearing unit of FIG. 本発明の実施の形態２に係る車軸用軸受装置のハブシャフトの中心部から一方の側を示す断面図である。It is sectional drawing which shows one side from the center part of the hub shaft of the axle bearing device which concerns on Embodiment 2 of this invention. 実施の形態２の軸受ユニットの中心部から一方の側を示す断面図である。FIG. 6 is a cross-sectional view showing one side from the center of the bearing unit according to the second embodiment.

符号の説明Explanation of symbols

１ 車軸用軸受装置、２ ハブシャフト、３ フランジ、５ 円筒軸、６ａ インナ側内輪が圧入される部分、６ｂ アウタ側内輪が圧入される部分、７ かしめ部、１０ 軸受ユニット、１１ 内輪、１２ａ インナ側内輪、１２ｂ アウタ側内輪、１３ 外輪、１４ 転動体。
DESCRIPTION OF SYMBOLS 1 Axle bearing device, 2 Hub shaft, 3 Flange, 5 Cylindrical shaft, 6a Part where inner side inner ring is press-fitted, 6b Part where outer side inner ring is press-fitted, 7 Caulking part, 10 Bearing unit, 11 Inner ring, 12a Inner Side inner ring, 12b Outer side inner ring, 13 Outer ring, 14 Rolling elements.

Claims (3)

アウタ側に車輪が取付けられるフランジを有し、該フランジのインナ側に円筒軸が設けられたハブシャフトと、インナ側内輪及びアウタ側内輪からなる内輪と外輪とこれら両者の間に配設された転動体とからなり、前記内輪がハブシャフトの円筒軸に圧入される軸受ユニットとを備え、
前記円筒軸とこれに圧入されるアウタ側内輪の締めしろを、前記円筒軸とこれに圧入されるインナ側内輪の締めしろより大きく設定したことを特徴とする車軸用軸受装置。 A hub shaft having a flange to which a wheel is attached on the outer side and a cylindrical shaft is provided on the inner side of the flange, and an inner ring and an outer ring made up of an inner side inner ring and an outer side inner ring are disposed between both of them. A rolling unit, and a bearing unit in which the inner ring is press-fitted into the cylindrical shaft of the hub shaft,
The axle bearing device according to claim 1, wherein a tightening margin between the cylindrical shaft and an outer side inner ring press-fitted into the cylindrical shaft is set larger than a tightening margin between the cylindrical shaft and an inner side inner ring press-fitted into the cylindrical shaft. 前記ハブシャフトの円筒軸の軸受ユニットのアウタ側内輪が圧入される部分の外径を、前記インナ側内輪が圧入される部分の外径より大径に形成したことを特徴とする請求項１記載の車軸用軸受装置。   2. The outer diameter of a portion into which an outer side inner ring of a cylindrical shaft bearing unit of the hub shaft is press-fitted is formed to be larger than an outer diameter of a portion into which the inner side inner ring is press-fitted. Axle bearing device. 前記円筒軸に圧入される軸受ユニットのアウタ側内輪の内径を、前記インナ側内輪の内径より小径に形成したことを特徴とする請求項１記載の車軸用軸受装置。
The axle bearing device according to claim 1, wherein an inner diameter of the outer side inner ring of the bearing unit press-fitted into the cylindrical shaft is smaller than an inner diameter of the inner side inner ring.
JP2006220923A 2006-08-14 2006-08-14 Bearing device for axle Withdrawn JP2008045649A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105518321A (en) * 2013-10-04 2016-04-20 日本精工株式会社 Double-row tapered roller bearing unit and method for manufacturing same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105518321A (en) * 2013-10-04 2016-04-20 日本精工株式会社 Double-row tapered roller bearing unit and method for manufacturing same
EP3054184A4 (en) * 2013-10-04 2017-02-08 NSK Ltd. Double-row tapered roller bearing unit and method for manufacturing same

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