JP2007205577A - Hub unit - Google Patents

Hub unit Download PDF

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Publication number
JP2007205577A
JP2007205577A JP2007117096A JP2007117096A JP2007205577A JP 2007205577 A JP2007205577 A JP 2007205577A JP 2007117096 A JP2007117096 A JP 2007117096A JP 2007117096 A JP2007117096 A JP 2007117096A JP 2007205577 A JP2007205577 A JP 2007205577A
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Prior art keywords
hub unit
caulking
caulking portion
shaft body
flat surface
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JP2007117096A
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JP4829170B2 (en
Inventor
Shinichiro Kashiwagi
信一郎 柏木
Naoki Morimura
直樹 森村
Kazuhisa Toda
一寿 戸田
Tadashi Mitarai
匡 御手洗
Keisuke Murakami
啓款 村上
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JTEKT Corp
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JTEKT Corp
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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
    • 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
    • F16C19/186—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 three raceways provided integrally on parts other than race rings, e.g. third 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hub unit capable of improving slip-off resistance by a caulking portion and to easily perform determination even when the caulking portion is visually examined. <P>SOLUTION: In this hub unit wherein a rolling bearing 2 is externally fitted to a shaft body 1, the caulking portion 3 obtained by swelling and deforming one end side of the shaft body radially outward, is pressed to an outer end face of an inner ring 21 of the rolling bearing 2 to lock and fix the rolling bearing 2 to the shaft body 1, a flat face 3a is formed on an outer end face of the caulking portion along the radial direction and an an axial position of the flat face 3a is managed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、軸体に転がり軸受を装着してなるハブユニットに関する。   The present invention relates to a hub unit in which a rolling bearing is mounted on a shaft body.

従来のこの種のハブユニットの一例として、図１３に示すような車両駆動輪用のハブユニットがある (特許文献１参照) 。   As an example of this type of conventional hub unit, there is a hub unit for vehicle drive wheels as shown in FIG. 13 (see Patent Document 1).

図例のハブユニットＢは、軸体としてのハブホイール８０の軸部８１に複列外向きアンギュラ玉軸受８２を外嵌装着し、この軸部８１の自由端をローリングかしめにより径方向外向きに膨出変形させて、この膨出変形したかしめ部８３を軸受８２の内輪８２ａの外端面に対して押し付けることによってハブホイール８０に軸受８２を抜け止め固定するようになっている。このようなハブユニットＢは車両のドライブシャフト８４とシャフトケース８５との間に取り付けられる。つまり、ハブホイール８０の軸部８１がドライブシャフト８４にスプライン嵌合されてナット８６により結合され、軸受８２の外輪８２ｂがシャフトケース８５にボルト８７により結合される。   In the illustrated hub unit B, a double-row outward angular ball bearing 82 is externally attached to a shaft portion 81 of a hub wheel 80 as a shaft body, and the free end of the shaft portion 81 is radially outward by rolling caulking. The bearing 82 is prevented from coming off and fixed to the hub wheel 80 by bulging and deforming and pressing the swollen and crimped caulking portion 83 against the outer end surface of the inner ring 82a of the bearing 82. Such a hub unit B is attached between the drive shaft 84 and the shaft case 85 of the vehicle. That is, the shaft portion 81 of the hub wheel 80 is spline fitted to the drive shaft 84 and coupled by the nut 86, and the outer ring 82 b of the bearing 82 is coupled to the shaft case 85 by the bolt 87.

なお、上記ハブホイール８０の軸部８１は、かしめ前において、図１４中の仮想線で示すように、軸部８１の自由端に円筒形部分を設けた形状になっている。この円筒形部分に対して、図１５に示すようなかしめ治具９０をあてがい、かしめ治具９０を一点鎖線Ｏ回りに一定角度αでローリングさせることにより、軸部８１の自由端を径方向外向きに膨出変形させて、内輪８２ａの外端面に押し付けるようにしている。
特開平５−２１５７５７号公報 The shaft portion 81 of the hub wheel 80 has a shape in which a cylindrical portion is provided at the free end of the shaft portion 81 as shown by a virtual line in FIG. 14 before caulking. A caulking jig 90 as shown in FIG. 15 is applied to the cylindrical portion, and the caulking jig 90 is rolled around the alternate long and short dash line O at a constant angle α, so that the free end of the shaft portion 81 is radially outward. It is bulged and deformed in the direction to be pressed against the outer end surface of the inner ring 82a.
JP-A-5-215757

上記従来例では、かしめ部８３の外端面を丸みを帯びた形状にしているが、かしめ部８３の形状について厳密に管理していない。そのため、かしめ作業ごとにかしめ部８３の形状がばらつくことがあり、甚だしい場合には、かしめ部８３の径方向途中部分などが内輪８２ａ側から浮きあがった状態になることもあり、そのような場合には抜け荷重に対する抗力が不足することになりかねない。   In the above conventional example, the outer end surface of the caulking portion 83 has a rounded shape, but the shape of the caulking portion 83 is not strictly managed. For this reason, the shape of the caulking portion 83 may vary for each caulking operation, and in a severe case, the middle portion in the radial direction of the caulking portion 83 may be lifted from the inner ring 82a side. This may result in a lack of resistance to pull-out loads.

これに対して、かしめ後にかしめ部８３の仕上がり状態を目視検査することが考えられるが、かしめ部８３の外端面が丸みを帯びた形状であるため、外観だけでは前述したような浮き状態の発生の有無を確認できない。ここに改良の余地がある。   On the other hand, it is conceivable to visually inspect the finished state of the caulking portion 83 after caulking, but since the outer end surface of the caulking portion 83 is rounded, the appearance of the floating state as described above is generated only by the appearance. The presence or absence of can not be confirmed. There is room for improvement here.

したがって、本発明は、ハブユニットにおいて、かしめ部による抜け抗力を向上させるとともに、かしめ部を目視検査する場合でも判定を容易にできるようにすることを目的とする。   Therefore, an object of the present invention is to improve the pull-out resistance by the caulking portion in the hub unit, and to facilitate determination even when the caulking portion is visually inspected.

請求項１の発明にかかるハブユニットは、軸体に転がり軸受を外嵌装着し、この軸体の一端側を径方向外向きに膨出変形させたかしめ部を転がり軸受の内輪の外端面に対して押し付けることによって軸体に転がり軸受を抜け止め固定したハブユニットであって、前記かしめ部の外端面に、径方向に沿う平坦面が形成され、前記平坦面の軸方向位置を管理している。   In the hub unit according to the first aspect of the present invention, a rolling bearing is externally fitted to the shaft body, and one end side of the shaft body is bulged and deformed radially outward, and a caulked portion is formed on the outer end surface of the inner ring of the rolling bearing. A hub unit in which a rolling bearing is secured to the shaft body by pressing against the shaft body, and a flat surface along the radial direction is formed on the outer end surface of the caulking portion, and the axial position of the flat surface is managed. Yes.

請求項２の発明にかかるハブユニットは、軸体に転がり軸受を外嵌装着し、この軸体の一端側を径方向外向きに膨出変形させたかしめ部を転がり軸受の内輪の外端面に対して押し付けることによって軸体に転がり軸受を抜け止め固定したハブユニットであって、前記かしめ部の外端面に、かしめ部の軸方向幅寸法を決定するうえでの基準面となる径方向に沿う平坦面が形成されている。   According to a second aspect of the present invention, a rolling bearing is externally fitted to a shaft body, and a caulked portion is formed by bulging and deforming one end side of the shaft body radially outwardly on the outer end surface of the inner ring of the rolling bearing. A hub unit in which a rolling bearing is secured to a shaft body by pressing against the shaft body, and is arranged along a radial direction serving as a reference surface for determining an axial width dimension of the caulking portion on an outer end surface of the caulking portion A flat surface is formed.

このような本発明では、かしめ部の平坦面を形成する過程で、膨出変形させられるかしめ部の全体が内輪側へ押圧されることになって内輪の外端面に対して密着しやすくなる。   In the present invention as described above, in the process of forming the flat surface of the caulking portion, the entire caulking portion to be bulged and deformed is pressed toward the inner ring side, so that the caulking portion easily adheres to the outer end surface of the inner ring.

しかも、かしめ部の外端面に形成される平坦面は、形状的な特徴になると言える。というのは、かしめ部全体が内輪側に対して密着したならば平坦面がきれいに形成されるはずであるが、もし仮にかしめ部の一部が内輪側から浮いた状態になれば平坦面が波打って形成される。したがって、かしめ部の仕上がり状態を目視検査するときに、平坦面の状態を判定基準とすれば、目視による判定が容易に行えるようになる。   Moreover, it can be said that the flat surface formed on the outer end surface of the caulking portion has a shape characteristic. This is because if the entire caulking part is in close contact with the inner ring side, the flat surface should be formed cleanly, but if a part of the caulking part is lifted from the inner ring side, the flat surface will be wavy. It is formed by striking. Therefore, when the finished state of the caulking portion is visually inspected, if the state of the flat surface is used as a determination criterion, the visual determination can be easily performed.

また、請求項２の発明のように、平坦面をかしめ部において軸方向最外端に位置させれば、この平坦面がかしめ部の軸方向幅寸法を決定するうえでの基準面となる。そのため、この平坦面を管理することにより、本発明のハブユニットの全長寸法を設定しやすくなる。また、前記平坦面は、本発明のハブユニットの取付対象に対する取り付け基準面にもなるので、取付状態での軸方向寸法を高精度に管理できるようになる。   If the flat surface is positioned at the outermost end in the axial direction at the caulking portion as in the invention of claim 2, the flat surface becomes a reference surface for determining the axial width dimension of the caulking portion. Therefore, by managing this flat surface, it becomes easy to set the overall length of the hub unit of the present invention. In addition, since the flat surface also serves as an attachment reference surface for the attachment target of the hub unit of the present invention, the axial dimension in the attached state can be managed with high accuracy.

請求項３にかかるハブユニットは、請求項２記載のハブユニットにおいて、前記かしめ部の軸方向幅寸法を管理することにより、ハブユニットの軸方向の全長寸法を管理している。   According to a third aspect of the present invention, in the hub unit according to the second aspect, the overall axial dimension of the hub unit is managed by managing the axial width dimension of the caulking portion.

請求項４にかかるハブユニットは、請求項２記載のハブユニットにおいて、前記平坦面をハブユニットの取付対象に対する取付基準面としている。   A hub unit according to a fourth aspect is the hub unit according to the second aspect, wherein the flat surface is an attachment reference surface for an attachment target of the hub unit.

請求項５にかかるハブユニットは、求項４記載のハブユニットにおいて、前記軸体は、ドライブシャフトに嵌合され、前記ハブユニットの取付対象は、前記ドライブシャフトの軸方向途中部分に形成された段部の径方向に沿った端面である。   The hub unit according to claim 5 is the hub unit according to claim 4, wherein the shaft body is fitted to a drive shaft, and an attachment target of the hub unit is formed at an intermediate portion in the axial direction of the drive shaft. It is an end surface along the radial direction of the stepped portion.

請求項６にかかるハブユニットは、軸体に転がり軸受を外嵌装着し、この軸体の一端側を径方向外向きに膨出変形させて転がり軸受の内輪の外端面に押し付けたかしめ部の外端面に径方向に沿う平坦面が形成されたハブユニットにおいて、前記かしめ部は、ローリングかしめ治具により形成され、前記ローリングかしめ治具は、先端面の中心に形成された凸部と、先端面の外周縁に形成された輪状膨出部と、凸部と輪状膨出部との間に形成された環状陥没部とを有し、前記環状陥没部の底部には、中心軸に対して直交する仮想平面に対して傾斜する傾斜面が形成され、前記傾斜面の傾斜角度θ１は、ローリングかしめ過程におけるかしめ治具の中心軸に対する傾斜角度αと同一とされ、前記傾斜面により前記平坦面が形成されている。   A hub unit according to a sixth aspect of the present invention has a rolling bearing fitted on a shaft body, and has one end of the shaft body bulged and deformed radially outward so as to press against the outer end surface of the inner ring of the rolling bearing. In the hub unit in which a flat surface along the radial direction is formed on the outer end surface, the caulking portion is formed by a rolling caulking jig, and the rolling caulking jig has a convex portion formed at the center of the front end surface, and a tip end A ring-shaped bulging portion formed on the outer peripheral edge of the surface, and an annular depression formed between the convex portion and the ring-shaped bulging portion. An inclined surface that is inclined with respect to an orthogonal virtual plane is formed, and an inclination angle θ1 of the inclined surface is the same as an inclination angle α with respect to a central axis of a caulking jig in a rolling caulking process, and the flat surface is formed by the inclined surface. Is formed.

請求項１，２の発明では、かしめ部の外端面に径方向に沿う平坦面を形成することにより、当該かしめ部の形成過程において膨出変形させられるかしめ部の全体が内輪の外端面に対して押圧されて密着させられる形態になるので、従来例のような万一のかしめ部の浮き上がり現象が発生することを防止できるようになり、十分な抜け抗力を安定して確保できるようになる。   In the first and second aspects of the invention, by forming a flat surface along the radial direction on the outer end surface of the caulking portion, the entire caulking portion that is bulged and deformed in the process of forming the caulking portion is relative to the outer end surface of the inner ring. Therefore, it becomes possible to prevent the occurrence of the caulking part lifting phenomenon as in the conventional example, and to secure a sufficient pulling-out resistance stably.

しかも、本発明のようなかしめ部であれば、その外端面に形成される平坦面を、かしめ部の仕上がり状態を目視検査するときの判定基準とすることができるので、目視による判定が容易に行えるようになる。   Moreover, in the case of the caulking portion as in the present invention, the flat surface formed on the outer end surface can be used as a criterion for visual inspection of the finished state of the caulking portion, so that the visual determination is easy. You can do it.

特に、請求項２の発明のように、平坦面をかしめ部において軸方向最外端に位置させれば、この平坦面がかしめ部の軸方向幅寸法を決定するうえでの基準面とすることができるので、この平坦面を管理することにより、本発明の軸受装置の全長寸法を設定しやすくなる。また、前記平坦面は、本発明のハブユニットの取付対象に対する取り付け基準面とすることができるので、取付状態での軸方向寸法を高精度に管理できるようになる。   In particular, if the flat surface is positioned at the outermost end in the axial direction at the caulking portion as in the invention of claim 2, the flat surface is used as a reference surface for determining the axial width dimension of the caulking portion. Therefore, by managing this flat surface, it becomes easy to set the overall length of the bearing device of the present invention. Further, the flat surface can be used as a reference mounting surface for the mounting target of the hub unit of the present invention, so that the axial dimension in the mounted state can be managed with high accuracy.

本発明の詳細を図面に示す実施形態に基づいて説明する。ここでは、ハブユニットとして車両駆動輪用のハブユニットを例に挙げる。   The details of the present invention will be described based on embodiments shown in the drawings. Here, a hub unit for vehicle drive wheels is taken as an example of the hub unit.

図１ないし図３は本発明の実施形態１にかかり、図１は、車両駆動輪用のハブユニットの縦断側面図、図２は、かしめ部の拡大図、図３は、図２のかしめ部を得るためのかしめ方法を説明するための工程図である。   1 to 3 relate to a first embodiment of the present invention. FIG. 1 is a longitudinal side view of a hub unit for vehicle drive wheels, FIG. 2 is an enlarged view of a caulking portion, and FIG. 3 is a caulking portion of FIG. It is process drawing for demonstrating the crimping method for obtaining.

図中、Ａはハブユニットの全体を示しており、１は軸体としてのハブホイール、２は転がり軸受としての複列外向きアンギュラ玉軸受、３はかしめ部である。   In the figure, A indicates the entire hub unit, 1 is a hub wheel as a shaft body, 2 is a double-row outward angular ball bearing as a rolling bearing, and 3 is a caulking portion.

ハブホイール１は、図示しない車輪が取り付けられる環状板部１１と、複列外向きアンギュラ玉軸受２が外装されるとともに、軸端に複列外向きアンギュラ玉軸受２を固定するためのかしめ部３が形成される軸部１２とを備えている。   The hub wheel 1 includes an annular plate portion 11 to which a wheel (not shown) is attached and a double-row outward angular ball bearing 2 and a caulking portion 3 for fixing the double-row outward angular ball bearing 2 to the shaft end. A shaft portion 12 is formed.

複列外向きアンギュラ玉軸受２は、軸部１２の小径外周面１２ａに外嵌される単一軌道を有する内輪２１と、二列の軌道溝を有する単一の外輪２２と、二列で配設される複数の玉２３と、二つの冠形保持器２４，２５とを備えており、前述のハブホイール１の軸部１２の大径外周面１２ｂを一方内輪とする構成になっている。なお、外輪２２の外周には、径方向外向きのフランジ２６が設けられており、このフランジ２６を介して図示しない車軸ケースなどに非回転に取り付けられる。   The double-row outward angular ball bearing 2 is arranged in two rows, an inner ring 21 having a single race that is externally fitted to the small-diameter outer peripheral surface 12a of the shaft portion 12, and a single outer race 22 having two rows of race grooves. A plurality of balls 23 provided and two crown-shaped cages 24 and 25 are provided, and the large-diameter outer peripheral surface 12b of the shaft portion 12 of the hub wheel 1 described above is configured as one inner ring. A radially outward flange 26 is provided on the outer periphery of the outer ring 22, and is attached to a non-rotating axle case or the like via the flange 26.

このようなハブユニットＡは車両のドライブシャフト４とシャフトケース５との間に取り付けられる。つまり、ハブホイール１の軸部１２がドライブシャフト４にスプライン嵌合されてナット６により結合され、軸受２の外輪２２がシャフトケース５にボルト７により結合される。   Such a hub unit A is attached between the drive shaft 4 and the shaft case 5 of the vehicle. That is, the shaft portion 12 of the hub wheel 1 is spline-fitted to the drive shaft 4 and coupled by the nut 6, and the outer ring 22 of the bearing 2 is coupled to the shaft case 5 by the bolt 7.

この実施形態１では、ハブホイール１の軸部１２のかしめ部３の外端面形状に特徴がある。   The first embodiment is characterized by the outer end surface shape of the caulking portion 3 of the shaft portion 12 of the hub wheel 1.

つまり、かしめ部３の外端面の径方向途中の領域Ｗに、径方向に沿う平坦面３ａが形成されている。この平坦面３ａは、円環状に形成されている。このようなかしめ部３において平坦面３ａよりも内径側領域および外径側領域については、丸みを帯びた形状に形成されている。   That is, the flat surface 3 a along the radial direction is formed in a region W in the radial direction of the outer end surface of the caulking portion 3. The flat surface 3a is formed in an annular shape. In the caulking portion 3, the inner diameter side region and the outer diameter side region with respect to the flat surface 3 a are formed in a rounded shape.

そして、かしめ部３において平坦面３ａは、かしめ部３での軸方向最外端に位置されている。そのために、この平坦面３ａがかしめ部３の軸方向幅寸法ｈを決定するうえでの基準面となり、この平坦面３ａを管理することにより、ハブユニットＡの全長寸法Ｈを設定しやすくなる。また、平坦面３ａは、ハブユニットＡの取付対象（ドライブシャフト４）に対する取り付け基準面にもなるので、取付状態での軸方向寸法を高精度に管理できるようになる。   In the caulking portion 3, the flat surface 3 a is located at the outermost end in the axial direction of the caulking portion 3. Therefore, the flat surface 3a serves as a reference surface for determining the axial width dimension h of the caulking portion 3, and the overall length H of the hub unit A can be easily set by managing the flat surface 3a. Further, since the flat surface 3a also serves as an attachment reference surface for the attachment target (drive shaft 4) of the hub unit A, the axial dimension in the attached state can be managed with high accuracy.

次に、上述したかしめ部３の形成方法について説明する。まず、ハブホイール１の軸部１２の小径部１２ａに対して内輪２１を例えば圧入により外嵌装着してから、軸部１２の自由端側に設けてある円筒形部分１２ｃを、従来技術での説明に利用した図１５に示すようなかしめ治具９０を用いてローリングかしめする。このとき、かしめ治具９０の先端を軸部１２の円筒形部分１２ｃにあてがい、かしめ治具９０を一点鎖線Ｏ回りに一定角度αでローリングさせる。これにより、軸部１２の円筒形部分１２ｃが径方向外向きに膨出変形されることになって、図３（ａ）に示すような丸みを帯びた形状のかしめ部３が得られる。   Next, a method for forming the caulking portion 3 described above will be described. First, after the inner ring 21 is externally fitted to the small-diameter portion 12a of the shaft portion 12 of the hub wheel 1 by, for example, press fitting, the cylindrical portion 12c provided on the free end side of the shaft portion 12 is replaced with the conventional technology. Rolling caulking is performed using a caulking jig 90 as shown in FIG. At this time, the tip of the caulking jig 90 is applied to the cylindrical portion 12c of the shaft portion 12, and the caulking jig 90 is rolled around the alternate long and short dash line O at a constant angle α. As a result, the cylindrical portion 12c of the shaft portion 12 is bulged and deformed outward in the radial direction, and the crimped portion 3 having a round shape as shown in FIG. 3A is obtained.

この後、図３（ｂ）に示すように、かしめ部３に対して、図４に示すような整形プレス治具１００をあてがい、所要圧力でプレスすることにより、かしめ部３の外端面に平坦面３ａを形成する。ここで用いる整形プレス治具１００は、先端面に凹部１０１が設けられており、この凹部１０１の底面は、整形プレス治具１００の軸線Ｊに対して直交する径方向に沿う面とほぼ平行に形成されている。このような整形プレス治具１００でもって図３（ａ）の形状のかしめ部３をプレスすれば、このかしめ部３の外端面において径方向途中領域Ｗに径方向に沿う平坦面３ａが形成されることになる。しかも、そのとき、かしめ部３の全体が内輪２１側に押圧されることになって、かしめ部３の全体が内輪２１の外端面に対して密着させられることになる。   Thereafter, as shown in FIG. 3B, the shaping press jig 100 as shown in FIG. 4 is applied to the caulking portion 3 and pressed at a required pressure so that the outer end surface of the caulking portion 3 is flattened. Surface 3a is formed. The shaping press jig 100 used here is provided with a concave portion 101 on the tip surface, and the bottom surface of the concave portion 101 is substantially parallel to a surface along the radial direction perpendicular to the axis J of the shaping press jig 100. Is formed. When the caulking portion 3 having the shape shown in FIG. 3A is pressed with such a shaping press jig 100, a flat surface 3a along the radial direction is formed in the radially intermediate region W on the outer end surface of the caulking portion 3. Will be. In addition, at that time, the entire caulking portion 3 is pressed toward the inner ring 21, and the entire caulking portion 3 is brought into close contact with the outer end surface of the inner ring 21.

このように、かしめ部３について、ローリングかしめの後、プレスにより圧縮整形させるようにしているから、かしめ部３の全体を内輪２１の外端面に対してほぼ均等に押し付けることができるようになり、それによって抜け荷重に対する十分な抜け抗力を常に安定して確保できるようになる。   Thus, since the caulking portion 3 is compressed and shaped by pressing after rolling caulking, the entire caulking portion 3 can be pressed almost uniformly against the outer end surface of the inner ring 21. As a result, a sufficient slip resistance against the slipping load can always be secured stably.

また、上述したようなかしめ方法によって、かしめ部３の形状安定性ならびに十分な抜け抗力の確保ができるようになるのであるが、もし仮にプレスによる加圧力が不足するようなことがあると、かしめ力が不足するおそれがある。   In addition, the above-described caulking method can secure the shape stability of the caulking portion 3 and sufficient pulling resistance, but if the pressurizing force by the press may be insufficient, it will be caulked. There is a risk of lack of power.

そこで、このような万一の不備が発生していることを発見するために、かしめ部３を目視検査することが好ましい。この目視検査を行う場合、かしめ部３に形成した平坦面３ａが形状的な特徴になることに着目し、この平坦面３ａの状態を調べるようにしている。ちなみに、かしめ部３全体が内輪２１側に対して密着した状態になれば円環状の平坦面３ａがきれいに形成されるはずであるが、もし仮にかしめ部３の一部が内輪２１側から浮いた状態になれば円環状の平坦面３ａが波打って形成されることになる。したがって、かしめ部３の仕上がり状態を目視検査するときに、平坦面３ａの状態を判定基準とすることによって、目視による判定が容易に行えるようになる。例えば、平坦面３ａがきれいに形成されている場合には、かしめ部３全体が内輪２１側に対して密着した状態になった良品であると判定することができ、また、仮に例えば平坦面３ａが波打つ状態に形成されている場合には、かしめ部３の一部が内輪２１側から浮いた状態になった不良品であると判定することができる。   Therefore, it is preferable to visually inspect the caulking portion 3 in order to find out that such a defect has occurred. When this visual inspection is performed, attention is paid to the fact that the flat surface 3a formed on the caulking portion 3 has a shape characteristic, and the state of the flat surface 3a is examined. Incidentally, if the entire caulking portion 3 is in close contact with the inner ring 21 side, an annular flat surface 3a should be formed cleanly, but if the caulking portion 3 partially floats from the inner ring 21 side. If it will be in a state, the annular | circular shaped flat surface 3a will be waved and formed. Therefore, when the finished state of the caulking portion 3 is visually inspected, the state of the flat surface 3a is used as a determination criterion, so that the visual determination can be easily performed. For example, when the flat surface 3a is formed cleanly, it can be determined that the entire caulked portion 3 is in a state of being in close contact with the inner ring 21 side. When formed in a wavy state, it can be determined that a part of the caulking portion 3 is a defective product in a state where it floats from the inner ring 21 side.

また、上記実施形態のように、平坦面３ａをかしめ部３において軸方向最外端に位置させていれば、この平坦面３ａがかしめ部３の軸方向幅寸法ｈを決定するうえでの基準面となる。そのため、この平坦面３ａを管理することにより、車両用ハブユニットＡの全長寸法Ｈを高精度に管理できるようになる。また、平坦面３ａは、ハブユニットＡの取付対象に対する取り付け基準面にもなるので、取付状態での軸方向寸法を高精度に管理できるようになる。   If the flat surface 3a is positioned at the outermost end in the axial direction in the caulking portion 3 as in the above embodiment, the flat surface 3a is a reference for determining the axial width dimension h of the caulking portion 3. It becomes a surface. Therefore, by managing the flat surface 3a, the overall length H of the vehicle hub unit A can be managed with high accuracy. Moreover, since the flat surface 3a also serves as an attachment reference surface for the attachment target of the hub unit A, the axial dimension in the attached state can be managed with high accuracy.

図４ないし図６は本発明の実施形態２にかかり、図４は、ハブユニットの縦断側面図、図５は、かしめ部の拡大図、図６は、図５のかしめ部を得るためのかしめ方法を説明するための工程図である。   4 to 6 relate to a second embodiment of the present invention, FIG. 4 is a longitudinal side view of the hub unit, FIG. 5 is an enlarged view of a caulking portion, and FIG. 6 is a caulking portion for obtaining the caulking portion of FIG. It is process drawing for demonstrating a method.

この実施形態２では、かしめ部３の外端面における径方向途中領域に平坦面３ａを設けるとともに、この平坦面３ａの外径側領域に径方向に沿う仮想平面に対して所要角度θ傾斜するテーパ面３ｂを設けている。   In the second embodiment, a flat surface 3a is provided in an intermediate region in the radial direction on the outer end surface of the caulking portion 3, and a taper inclined at a required angle θ with respect to a virtual plane along the radial direction in the outer diameter side region of the flat surface 3a. A surface 3b is provided.

このようなかしめ部３を得るには、まず、上記実施形態１と同様に、図１５に示すようなかしめ治具９０を用いてローリングかしめする。このとき、かしめ治具９０の先端を軸部１２の円筒形部分１２ｃにあてがい、かしめ治具９０を一点鎖線Ｏ回りに一定角度αでローリングさせる。これにより、軸部１２の円筒形部分１２ｃが径方向外向きに膨出変形されることになって、図６（ａ）に示すような丸みを帯びた形状のかしめ部３が得られる。この後、図６（ｂ）に示すように、かしめ部３に対して整形プレス治具２００をあてがい、所要圧力でプレスすることにより、かしめ部３の外端面に平坦面３ａを形成するとともに、この平坦面３ａの外径側領域に径方向に沿う平面に対して所要角度θ傾斜するテーパ面３ｂを形成する。ここで用いる整形プレス治具２００は、先端面に凹部２０１が設けられており、この凹部２０１の底面角部に開口側へ向けて拡径するテーパ面２０２が形成されている。   In order to obtain such a caulking portion 3, first, as in the first embodiment, rolling caulking is performed using a caulking jig 90 as shown in FIG. At this time, the tip of the caulking jig 90 is applied to the cylindrical portion 12c of the shaft portion 12, and the caulking jig 90 is rolled around the alternate long and short dash line O at a constant angle α. As a result, the cylindrical portion 12c of the shaft portion 12 is bulged and deformed outward in the radial direction, and the crimped portion 3 having a round shape as shown in FIG. 6A is obtained. Thereafter, as shown in FIG. 6 (b), by applying a shaping press jig 200 to the caulking portion 3 and pressing at a required pressure, a flat surface 3a is formed on the outer end surface of the caulking portion 3, A tapered surface 3b inclined at a required angle θ with respect to a plane along the radial direction is formed in the outer diameter side region of the flat surface 3a. The shaping press jig 200 used here is provided with a concave portion 201 on the front end surface, and a tapered surface 202 is formed at the corner of the bottom surface of the concave portion 201 to expand toward the opening side.

この実施形態２では、上記実施形態１と同様の作用、効果が得られることに加えて、プレス過程でかしめ部３の外周縁側をも内輪２１側へ押圧させるようにしているので、かしめ部３の外周縁側が整形直後にスプリングバックすることを防止できるようになり、設計どおりの抜け抗力をより確実に得ることができる。   In the second embodiment, in addition to obtaining the same operations and effects as those of the first embodiment, the outer peripheral edge side of the caulking portion 3 is also pressed toward the inner ring 21 in the pressing process. It becomes possible to prevent the outer peripheral edge side from being spring-backed immediately after shaping, so that the designed slip resistance can be obtained more reliably.

図７ないし図９は参考例としての実施形態３にかかり、図７は、ハブユニットの縦断側面図、図８は、かしめ部の拡大図、図９は、図８のかしめ部を得るためのかしめ方法を説明するための工程図である。   7 to 9 relate to Embodiment 3 as a reference example, FIG. 7 is a longitudinal side view of the hub unit, FIG. 8 is an enlarged view of a caulking portion, and FIG. 9 is for obtaining the caulking portion of FIG. It is process drawing for demonstrating the caulking method.

この実施形態３では、かしめ部３の外端面における外径側領域に平坦面３ａを設けている。   In the third embodiment, a flat surface 3 a is provided in the outer diameter side region on the outer end surface of the caulking portion 3.

このようなかしめ部３を得るには、まず、上記実施形態１と同様に、図１５に示すようなかしめ治具９０を用いてローリングかしめする。このとき、かしめ治具９０の先端を軸部１２の円筒形部分１２ｃにあてがい、かしめ治具９０を一点鎖線Ｏ回りに一定角度αでローリングさせる。これにより、軸部１２の円筒形部分１２ｃが径方向外向きに膨出変形されることになって、図９（ａ）に示すような丸みを帯びた形状のかしめ部３が得られる。この後、図９（ｂ）に示すように、かしめ部３に対して整形プレス治具３００をあてがい、所要圧力でプレスすることにより、かしめ部３の外端面の外径側に平坦面３ａを形成する。ここで用いる整形プレス治具３００は、先端面に凹部３０１が設けられており、この凹部３０１の外周の隆起面でもって前述した平坦面３ａを得るようにしている。   In order to obtain such a caulking portion 3, first, as in the first embodiment, rolling caulking is performed using a caulking jig 90 as shown in FIG. At this time, the tip of the caulking jig 90 is applied to the cylindrical portion 12c of the shaft portion 12, and the caulking jig 90 is rolled around the alternate long and short dash line O at a constant angle α. As a result, the cylindrical portion 12c of the shaft portion 12 is bulged and deformed outward in the radial direction, and the crimped portion 3 having a round shape as shown in FIG. 9A is obtained. Thereafter, as shown in FIG. 9B, the flat pressing surface 3 a is formed on the outer diameter side of the outer end surface of the caulking portion 3 by applying a shaping press jig 300 to the caulking portion 3 and pressing it with a required pressure. Form. The shaping press jig 300 used here is provided with a concave portion 301 on the front end surface, and the above-described flat surface 3 a is obtained by a raised surface on the outer periphery of the concave portion 301.

この実施形態３では、上記実施形態１と同様、かしめ部３の形状を安定化して十分な抜け抗力を確保できるようになるとともに、目視検査時の判定が容易になるという作用、効果を得ることができるものの、平坦面３ａをかしめ部３において軸方向最外端に位置させていないので、かしめ部３の軸方向幅寸法や取付状態での軸方向寸法を管理しやすくなるという作用、効果を得ることはできない。   In the third embodiment, as in the first embodiment, the shape and shape of the caulking portion 3 can be stabilized to ensure a sufficient pull-out resistance, and an effect and an effect of facilitating determination during visual inspection can be obtained. However, since the flat surface 3a is not positioned at the outermost end in the axial direction in the caulking portion 3, the operation and effect that it is easy to manage the axial width dimension of the caulking portion 3 and the axial dimension in the attached state. I can't get it.

なお、本発明は上記実施形態のみに限定されるものではなく、種々な応用や変形が考えられる。   In addition, this invention is not limited only to the said embodiment, Various application and deformation | transformation can be considered.

（１）上記実施形態１〜３では、かしめ部３に平坦面３ａを形成するためにローリングかしめとプレスとを併用しているが、上記実施形態１，２でのかしめ部３についてはローリングかしめのみで形成することができる。その場合、図１０および図１１に示すように、ローリングかしめ治具９０について、その先端形状を工夫している。つまり、図１０のローリングかしめ治具９０の場合、その先端面の中心に設けられる凸部９１と、先端面の外周縁に設けられる輪状膨出部９２との間の環状陥没部９３の底部に径方向に沿う仮想平面Ｌに対して所要角度θ１傾斜する傾斜面９４を設け、環状陥没部９３において輪状膨出部９２寄り部分に所要曲率半径ｒ１の曲面９５を形成した構造になっている。なお、環状陥没部９３において凸部９１寄りの部分には所要曲率半径Ｒの曲面が形成されている。一方、図１１のローリングかしめ治具９０は、上述した図１０のローリングかしめ治具９０とほぼ同じであるが、陥没部９３において輪状膨出部９２側の内面を曲面９５ではなく傾斜面９４に対して所要角度θ２傾斜する傾斜面９６に形成した点が相違している。これらいずれのローリングかしめ治具９０についても、傾斜面９４の傾斜角度θ１を、ローリングかしめ過程におけるローリング角度αと同一に設定することにより、この傾斜面９４でもってかしめ部３に平坦面３ａを形成するようにできる。また、ローリングかしめ治具９０の曲面９５および傾斜面９６でもってかしめ部３の外径側３ｂに丸みを付けたり、テーパ状に形成したりするようにしている。このようなローリングかしめ治具９０を用いれば、上記実施形態１，２のようなプレス工程を省略できるようになり、製造コストの低減に貢献できるようになる。   (1) In the first to third embodiments, the rolling caulking and the press are used together to form the flat surface 3a on the caulking portion 3, but the caulking portion 3 in the first and second embodiments is used for the rolling caulking. Can only be formed. In that case, as shown in FIGS. 10 and 11, the tip shape of the rolling caulking jig 90 is devised. That is, in the case of the rolling caulking jig 90 shown in FIG. 10, at the bottom of the annular recess 93 between the convex portion 91 provided at the center of the tip surface and the ring-shaped bulging portion 92 provided at the outer peripheral edge of the tip surface. An inclined surface 94 inclined by a required angle θ1 with respect to a virtual plane L along the radial direction is provided, and a curved surface 95 having a required curvature radius r1 is formed in a portion close to the ring-shaped bulged portion 92 in the annular recessed portion 93. In addition, a curved surface having a required curvature radius R is formed in a portion near the convex portion 91 in the annular depressed portion 93. On the other hand, the rolling caulking jig 90 in FIG. 11 is substantially the same as the rolling caulking jig 90 in FIG. 10 described above, but the inner surface of the depressed portion 93 on the ring-shaped bulging portion 92 side is not the curved surface 95 but the inclined surface 94. The difference is that it is formed on an inclined surface 96 inclined at a required angle θ2. In any of these rolling caulking jigs 90, the flat surface 3a is formed on the caulking portion 3 by the inclined surface 94 by setting the inclination angle θ1 of the inclined surface 94 to be the same as the rolling angle α in the rolling caulking process. You can do that. In addition, the outer diameter side 3b of the caulking portion 3 is rounded or tapered by the curved surface 95 and the inclined surface 96 of the rolling caulking jig 90. If such a rolling caulking jig 90 is used, the pressing step as in the first and second embodiments can be omitted, and the manufacturing cost can be reduced.

（２）上記実施形態では、ハブユニットとして車両駆動輪用のハブユニットを例に挙げたが、例えば図１２に示すような車両従動輪用のハブユニットＣとしたり、あるいは自動車などのスライドドアのガイドローラやその他の軸受装置全般としたりすることができる。   (2) In the above embodiment, a hub unit for a vehicle driving wheel is taken as an example of the hub unit. However, for example, a hub unit C for a vehicle driven wheel as shown in FIG. It can be a guide roller or other general bearing devices.

本発明の実施形態１の車両駆動輪用ハブユニットの縦断側面図1 is a longitudinal side view of a vehicle drive wheel hub unit according to a first embodiment of the present invention. 図１中のかしめ部の拡大図Enlarged view of the caulking portion in FIG. 図２のかしめ部のかしめ形態を説明するための工程図Process drawing for demonstrating the caulking form of the caulking part of FIG. 本発明の実施形態２の車両駆動輪用ハブユニットの縦断側面図Vertical side view of a vehicle drive wheel hub unit according to a second embodiment of the present invention 図４中のかしめ部の拡大図Enlarged view of the caulking portion in FIG. 図５のかしめ部のかしめ形態を説明するための工程図Process drawing for demonstrating the caulking form of the caulking part of FIG. 参考例としての実施形態３の車両駆動輪用ハブユニットの縦断側面図Longitudinal side view of a hub unit for a vehicle drive wheel of Embodiment 3 as a reference example 図７中のかしめ部の拡大図Enlarged view of the caulking portion in FIG. 図８のかしめ部のかしめ形態を説明するための工程図Process drawing for demonstrating the caulking form of the caulking part of FIG. 図２のかしめ部を得るためのローリングかしめ治具の形状を示す側面図Side view showing the shape of a rolling caulking jig for obtaining the caulking portion of FIG. 図５のかしめ部を得るためのローリングかしめ治具の形状を示す側面図The side view which shows the shape of the rolling crimping jig | tool for obtaining the crimping part of FIG. 本発明が適用可能な車両従動輪用のハブユニットを示す縦断側面図1 is a longitudinal side view showing a hub unit for a vehicle driven wheel to which the present invention is applicable. 従来例の車両駆動輪用ハブユニットの縦断側面図Vertical side view of a conventional vehicle drive wheel hub unit 図１３中のかしめ部の拡大図Enlarged view of the caulking portion in FIG. 一般的なローリングかしめ形態を示す説明図Explanatory drawing showing a general rolling caulking form

符号の説明Explanation of symbols

Ａ 車両用ハブユニット
１ ハブホイール
１２ ハブホイールの軸部
２ 複列外向きアンギュラ玉軸受
２１ 軸受の内輪
３ かしめ部
３ａ かしめ部の外端面の平坦面 A Hub unit for vehicle 1 Hub wheel 12 Shaft portion of hub wheel 2 Double-row outward angular contact ball bearing 21 Inner ring of bearing 3 Caulking portion 3a Flat surface of outer end surface of caulking portion

Claims (6)

軸体に転がり軸受を外嵌装着し、この軸体の一端側を径方向外向きに膨出変形させたかしめ部を転がり軸受の内輪の外端面に対して押し付けることによって軸体に転がり軸受を抜け止め固定したハブユニットであって、
前記かしめ部の外端面に、径方向に沿う平坦面が形成され、前記平坦面の軸方向位置を管理した、ことを特徴とするハブユニット。 A rolling bearing is externally fitted to the shaft body, and one end side of the shaft body is bulged and deformed radially outward to press the caulking portion against the outer end surface of the inner ring of the rolling bearing. A hub unit that is secured to
A hub unit, wherein a flat surface along a radial direction is formed on an outer end surface of the caulking portion, and an axial position of the flat surface is managed. 軸体に転がり軸受を外嵌装着し、この軸体の一端側を径方向外向きに膨出変形させたかしめ部を転がり軸受の内輪の外端面に対して押し付けることによって軸体に転がり軸受を抜け止め固定したハブユニットであって、
前記かしめ部の外端面に、かしめ部の軸方向幅寸法を決定するうえでの基準面となる径方向に沿う平坦面が形成された、ことを特徴とするハブユニット。 A rolling bearing is externally fitted to the shaft body, and one end side of the shaft body is bulged and deformed radially outward to press the caulking portion against the outer end surface of the inner ring of the rolling bearing. A hub unit that is secured to
A hub unit, wherein a flat surface along a radial direction serving as a reference surface for determining an axial width dimension of a caulking portion is formed on an outer end surface of the caulking portion. 請求項２記載のハブユニットにおいて、
前記かしめ部の軸方向幅寸法を管理することにより、ハブユニットの軸方向の全長寸法を管理した、ことを特徴とするハブユニット。 The hub unit according to claim 2,
A hub unit characterized in that the overall axial dimension of the hub unit is managed by managing the axial width dimension of the caulking portion. 請求項２記載のハブユニットにおいて、
前記平坦面をハブユニットの取付対象に対する取付基準面とした、ことを特徴とするハブユニット。 The hub unit according to claim 2,
A hub unit characterized in that the flat surface serves as an attachment reference surface for an attachment target of the hub unit. 請求項４記載のハブユニットにおいて、
前記軸体は、ドライブシャフトに嵌合され、
前記ハブユニットの取付対象は、前記ドライブシャフトの軸方向途中部分に形成された段部の径方向に沿った端面である、ことを特徴とするハブユニット。 The hub unit according to claim 4,
The shaft body is fitted to a drive shaft,
The hub unit is attached to an end surface along a radial direction of a step portion formed at an intermediate portion in the axial direction of the drive shaft. 軸体に転がり軸受を外嵌装着し、この軸体の一端側を径方向外向きに膨出変形させて転がり軸受の内輪の外端面に押し付けたかしめ部の外端面に径方向に沿う平坦面が形成されたハブユニットにおいて、
前記かしめ部は、ローリングかしめ治具により形成され、
前記ローリングかしめ治具は、先端面の中心に形成された凸部と、先端面の外周縁に形成された輪状膨出部と、凸部と輪状膨出部との間に形成された環状陥没部とを有し、
前記環状陥没部の底部には、中心軸に対して直交する仮想平面に対して傾斜する傾斜面が形成され、
前記傾斜面の傾斜角度θ１は、ローリングかしめ過程におけるかしめ治具の中心軸に対する傾斜角度αと同一とされ、前記傾斜面により前記平坦面が形成された、ことを特徴とするハブユニット。 A rolling bearing is fitted on the shaft body, and one end of the shaft body is bulged and deformed radially outward, and pressed against the outer end surface of the inner ring of the rolling bearing. In the hub unit formed with
The caulking portion is formed by a rolling caulking jig,
The rolling caulking jig includes a convex portion formed at the center of the tip surface, a ring-shaped bulge portion formed at the outer periphery of the tip surface, and an annular depression formed between the convex portion and the ring-shaped bulge portion. And
An inclined surface that is inclined with respect to a virtual plane orthogonal to the central axis is formed at the bottom of the annular depression,
The hub unit according to claim 1, wherein an inclination angle θ1 of the inclined surface is the same as an inclination angle α with respect to a central axis of a caulking jig in a rolling caulking process, and the flat surface is formed by the inclined surface.
JP2007117096A 2007-04-26 2007-04-26 Hub unit Expired - Lifetime JP4829170B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009243602A (en) * 2008-03-31 2009-10-22 Jtekt Corp Wheel bearing device and manufacturing method therefor
US8313244B2 (en) 2008-03-28 2012-11-20 Jtekt Corporation Wheel bearing assembly, manufacturing method therefor, and calk jig

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0416499A (en) * 1990-05-10 1992-01-21 Nissan Motor Co Ltd Auxiliary wheel elevating device for three-wheeled reach type fork-lift
JPH115404A (en) * 1997-06-16 1999-01-12 Nippon Seiko Kk Wheel supporting hub unit
JPH11129703A (en) * 1997-08-28 1999-05-18 Nippon Seiko Kk Rolling bearing unit for wheel supporting
JP2000513661A (en) * 1997-06-24 2000-10-17 ザ ティムケン カンパニー Method and machine for integrating rotatable machine components

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0416499A (en) * 1990-05-10 1992-01-21 Nissan Motor Co Ltd Auxiliary wheel elevating device for three-wheeled reach type fork-lift
JPH115404A (en) * 1997-06-16 1999-01-12 Nippon Seiko Kk Wheel supporting hub unit
JP2000513661A (en) * 1997-06-24 2000-10-17 ザ ティムケン カンパニー Method and machine for integrating rotatable machine components
JPH11129703A (en) * 1997-08-28 1999-05-18 Nippon Seiko Kk Rolling bearing unit for wheel supporting

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8313244B2 (en) 2008-03-28 2012-11-20 Jtekt Corporation Wheel bearing assembly, manufacturing method therefor, and calk jig
JP2009243602A (en) * 2008-03-31 2009-10-22 Jtekt Corp Wheel bearing device and manufacturing method therefor

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