JP4178669B2 - Manufacturing method of bearing device - Google Patents

Manufacturing method of bearing device Download PDF

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Publication number
JP4178669B2
JP4178669B2 JP17529999A JP17529999A JP4178669B2 JP 4178669 B2 JP4178669 B2 JP 4178669B2 JP 17529999 A JP17529999 A JP 17529999A JP 17529999 A JP17529999 A JP 17529999A JP 4178669 B2 JP4178669 B2 JP 4178669B2
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Prior art keywords
inner ring
caulking
shaft
time
bent
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JP17529999A
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JP2001003945A (en
Inventor
一寿 戸田
知博 石井
信一郎 柏木
匡 御手洗
浩司 湯浅
大策 冨田
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JTEKT Corp
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JTEKT Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B27/00—Hubs
    • B60B27/0078—Hubs characterised by the fixation of bearings
    • B60B27/0084—Hubs characterised by the fixation of bearings caulking to fix inner race
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)
  • Automatic Assembly (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、軸体に転がり軸受を装着してなる軸受装置の製造方法に関する。
【０００２】
【従来の技術】
従来のこの種の軸受装置の一例として、図５に示すような車両用ハブユニットがある。
【０００３】
図例の車両用ハブユニットは、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屈曲させて、この屈曲させたかしめ部８５を軸受８２の内輪８４の一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。
【０００４】
なお、上記ハブホイール８０の軸部８１のかしめ前形状は、図中の仮想線で示すように、外径寸法が軸方向各位置で均一になっており、この軸部８１の自由端に、図６に示すように、かしめ治具９０をあてがい、このかしめ治具９０を一点鎖線Ｏ回りにローリングさせることにより、軸部８１の自由端が径方向外向きに屈曲されることになる。
【０００５】
【発明が解決しようとする課題】
上記従来例では、十分な軸力（抜け荷重に対する抗力）を確保することと、仕上がり状態を良好とする目的から、かしめ過程において、かしめ部８５の外周縁側ほど強く内輪８４側へ押圧させることにより、かしめ部８５についてその全体を内輪８４の一端面に対して密着させるようにしていた。
【０００６】
しかしながら、上述したようにかしめ過程でかしめ部８５の外周縁側をあまり強く押圧させると、内輪８４において複数の玉８６それぞれの当接位置に圧痕がついて、転がり特性を低下させるおそれがあることが判った。
【０００７】
そこで、本願発明者は、種々な実験を繰り返したところ、前記かしめ部８５が内輪８４の内周面における一端側角部に対して密着した状態であれば、前記かしめ部８５の外周縁側が内輪８４の外端面に対して密着していなくても、十分な軸力を確保できることを知見した。
【０００８】
このような事情に鑑み、本発明は、製造された軸受装置において、十分な軸力を確保したうえで、内輪の軌道面に対して悪影響を及ぼさないようにする軸受装置の製造方法の提供を目的としている。
【０００９】
【課題を解決するための手段】
請求項１の発明にかかる軸受装置の製造方法は、車輪が取り付けられる環状板部と軸部とを備えた軸体の軸部に転がり軸受を外嵌装着し、この軸部の一端側をかしめ治具によりローリングかしめすることにより径方向外向きに屈曲させて、この屈曲させたかしめ部を転がり軸受の内輪に対して押し付けることによって軸体に転がり軸受が抜け止め固定される軸受装置の製造方法であって、前記かしめ部を形成するかしめ加工は、加圧力を一定にした状態で行われ、軸部の一端側を径方向外向きに屈曲して半完成状態のかしめ部が得られる加工初期時間ｔ１と、ローリングを繰り返す加工後期時間ｔ２とからなり、前記かしめ部が、前記内輪の外端面に沿うように径方向外向きに屈曲され、前記内輪の内周面における一端側角部に設けられる丸い面取りに対しては密着され、前記内輪の面取りに連なる一端面に対しては離隔されるように、前記加工初期時間ｔ１においては内輪に対して作用する荷重を急峻に立ち上げ、前記加工後期時間ｔ２においては内輪に対して作用する荷重を緩慢に立ち上げるとともに、前記加工後期時間ｔ２の加工時間を調整することにより、かしめ部の内輪面取りに対する密着範囲が４５度〜９０度となるように管理したことを特徴とする。
【００１１】
以上、本発明では、要するに、かしめ部の内輪に対する密着範囲を規定することにより、かしめ部による軸力を管理する形態にしている。
【００１２】
【発明の実施の形態】
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。
【００１３】
図１ないし図４に本発明の一実施形態を示している。ここでは、軸受装置として車両用ハブユニットを例に挙げている。図１は、車両用ハブユニットの縦断側面図、図２は、図１のかしめ部の拡大図、図３は、かしめ加工中の内輪負荷荷重の変化を示す図表、図４は、かしめ部の密着範囲と軸力との関係を示す図表である。
【００１４】
図例の車両用ハブユニットにおいて、１は軸体としてのハブホイール１、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。
【００１５】
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。
【００１６】
複列外向きアンギュラ玉軸受２は、軸部１２の小径部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、前述のハブホイール１の軸部１２の大径部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、図示しない車軸ケースなどに固定される径方向外向きのフランジ２６が設けられている。また、内輪２１の内周面の軸方向両端の角部ならびに外輪２２の外周面の軸方向両端の角部には、一般的に周知のように、丸い面取りが設けられている。
【００１７】
かしめ部３は、ハブホイール１の軸部１２の軸端を、上記軸受２の内輪２１の外端面に沿うように、径方向外向きに屈曲することにより形成されている。
【００１８】
この実施形態では、ハブホイール１の軸部１２のかしめ部３の形状に特徴がある。
【００１９】
ここでは、かしめ部３が、内輪２１の内周面における外側角部に設けられる丸い面取りに対して密着されていて、この面取りに連なる内輪２１の外端面２１ａに対して離隔されている。
【００２０】
この面取りに対するかしめ部３の密着範囲は、面取りの曲率中心Ｐ１と面取りに対するかしめ部３の密着起点Ｐ２および密着終点Ｐ３とをそれぞれ結ぶ２つの直線のなす角度θで表され、当該角度θが４５度以上、９０度以下に設定されている。なお、この上限および下限の臨界値を決定した理由については、下記するかしめ加工の形態と関連するので、後で説明する。
【００２１】
次に、上述したかしめ部３を形成するときのかしめ形態について説明する。
【００２２】
この実施形態でのかしめ加工の基本的な形態は、従来例と同様である。すなわち、ハブホイール１の軸部１２の小径部１２ａに対して内輪２１を外嵌装着してから、軸部１２の自由端を、図６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。このかしめ加工では、加圧力を一定にした状態で所要時間にわたって行う。
【００２３】
そして、ローリングを開始してから所要時間ｔ１が経過する初期段階において、ハブホイール１の軸部１２の自由端が径方向外向きに屈曲されて半完成状態のかしめ部３が得られるのであるが、この後、ローリングを所要時間ｔ２について繰り返す。この加工後期時間ｔ２を長短調整することにより、かしめ部３の内輪２１に対する密着範囲つまり角度θを管理することができる。
【００２４】
このかしめ過程において内輪２１に対して作用する荷重の変化パターンは、図３に示すようになる。つまり、加工を開始するＡ点からＥ点までの加工初期時間ｔ１については、内輪２１に対して作用する荷重が急峻に立ち上がり、その後のＥ点からＦ点までの加工後期時間ｔ２については、内輪２１に対して作用する荷重が緩慢に立ち上がり、その後、かしめを終了すると、内輪２１に対して作用する荷重が２段階で急峻に立ち下がり、内輪２１に対して所要の荷重を付加した状態でかしめ部３により保持される。この荷重が、軸力として表される。
【００２５】
ちなみに、ハブホイール１の軸部１２の自由端の直径を３６〜４０ｍｍとし、肉厚を２〜５ｍｍとする場合、加圧力を１０トンとし、加工初期時間ｔ１を約１秒とし、加工後期時間ｔ２を約３秒として全加工時間を約４秒間とした。この場合、かしめ部３の内輪２１に対する密着範囲つまり角度θは６０〜９０度となり、得られた軸力は３５００〜４７００ｋｇｆとなる。
【００２６】
ここで、かしめ部３の内輪２１に対する密着範囲つまり角度θについて、上述したように４５〜９０度に特定した理由を説明する。つまり、下限値である４５度未満に設定するには、加工後期時間ｔ２を短くするのであるが、その場合、図４に示すように、車両用ハブユニットにおいて要求される軸力に到達しなくなり、一方、上限値である９０度を越えるように設定するには、加工後期時間ｔ２を長くするのであるが、その場合、図４に示すように、内輪２１において複数の玉２３それぞれの当接位置に圧痕が付きやすくなる他、得られる軸力が増加しなくなって飽和する。このような理由により、かしめ部３を内輪２１に対して密着させる形態の適正範囲が見いだせたのである。
【００２７】
以上説明したように、ハブホイール１の自由端をかしめ加工してかしめ部３を得る過程において、従来例のようにかしめ部３の外周縁側を必要以上に長く加圧しないように管理している。これにより、内輪２１に対して荷重が過剰に付与されなくなるので、内輪２１の軌道面に圧痕が付かずに済む結果になる。
【００２８】
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。例えば、上記実施形態では、軸受装置として車両用ハブユニットを例に挙げたが、例えば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することができる。
【００２９】
【発明の効果】
請求項１の発明では、かしめ部の内輪に対する密着範囲を規定することにより、かしめ部を得る過程において、従来例のように内輪に対して荷重過剰に付与させないようにしているから、要求される軸力を得たうえで、内輪の軌道面に圧痕が発生することを防止できるようになって転がり軸受の動作安定性を確保できるようになる。
【図面の簡単な説明】
【図１】本発明の一実施形態の車両用ハブユニットの縦断側面図
【図２】図１のかしめ部の拡大図
【図３】かしめ加工中の内輪負荷荷重の変化を示す図表
【図４】かしめ部の密着範囲と軸力との関係を示す図表
【図５】従来例の車両用ハブユニットの縦断側面図
【図６】ローリングかしめ形態を示す説明図
【符号の説明】
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
２１ａ 内輪の外端面
３ かしめ部
Ｐ０ 内輪の面取りの曲率中心
Ｐ１ かしめ部の密着起点
Ｐ２ かしめ部の密着終点[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of manufacturing a bearing device in which a rolling bearing is mounted on a shaft body.
[0002]
[Prior art]
As an example of this type of conventional bearing device, there is a vehicle hub unit as shown in FIG.
[0003]
In the illustrated vehicle hub unit, a double-row outward angular ball bearing 82 is externally fitted to a shaft portion 81 of a hub wheel 80, and the free end of the shaft portion 81 is bent radially outward by rolling caulking. The bearing 82 is prevented from coming off and fixed to the hub wheel 80 by pressing the bent caulking portion 85 against one end surface of the inner ring 84 of the bearing 82.
[0004]
In addition, the shape before the caulking of the shaft portion 81 of the hub wheel 80 has a uniform outer diameter at each position in the axial direction, as indicated by a virtual line in the figure. As shown in FIG. 6, by applying a caulking jig 90 and rolling the caulking jig 90 around the alternate long and short dash line O, the free end of the shaft portion 81 is bent outward in the radial direction.
[0005]
[Problems to be solved by the invention]
In the above conventional example, in order to ensure a sufficient axial force (resistance force against pull-out load) and to improve the finished state, in the caulking process, the outer peripheral edge side of the caulking portion 85 is more strongly pressed toward the inner ring 84 side. The entire caulking portion 85 is in close contact with one end surface of the inner ring 84.
[0006]
However, as described above, it is understood that if the outer peripheral edge side of the caulking portion 85 is pressed too strongly in the caulking process, the contact position of each of the plurality of balls 86 on the inner ring 84 may become indented, which may deteriorate the rolling characteristics. It was.
[0007]
Accordingly, the inventor of the present application has repeated various experiments. As long as the caulking portion 85 is in close contact with one end side corner portion of the inner peripheral surface of the inner ring 84, the outer peripheral edge side of the caulking portion 85 is the inner ring. It has been found that a sufficient axial force can be ensured even if it is not in close contact with the outer end face of 84.
[0008]
In view of such circumstances, the present invention provides a method for manufacturing a bearing device that ensures a sufficient axial force and does not adversely affect the raceway surface of the inner ring in the manufactured bearing device. It is aimed.
[0009]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a bearing device manufacturing method comprising: mounting a rolling bearing on a shaft portion of a shaft body having an annular plate portion to which a wheel is attached and a shaft portion; and caulking one end side of the shaft portion. A method of manufacturing a bearing device in which a rolling bearing is fixed to a shaft body by being bent radially outward by caulking with a jig and pressing the bent caulked portion against an inner ring of the rolling bearing. The caulking process for forming the caulking part is performed in a state in which the applied pressure is constant, and an initial stage of machining in which a semi-finished caulking part is obtained by bending one end side of the shaft part radially outward. It consists of a time t1 and a late processing time t2 in which rolling is repeated, and the caulking portion is bent radially outward along the outer end surface of the inner ring, and is provided at one end side corner portion on the inner peripheral surface of the inner ring. Round In the machining initial time t1, the load acting on the inner ring is sharply raised so that the chamfering is in close contact with the one end surface connected to the chamfering of the inner ring, and the machining later time At t2, the load acting on the inner ring is slowly started up, and by adjusting the machining time of the latter machining time t2, the contact range of the caulking portion with respect to the chamfering of the inner ring is managed to be 45 to 90 degrees. It is characterized by that.
[0011]
As described above, in the present invention, in summary, the axial force by the caulking portion is managed by defining the contact range of the caulking portion with respect to the inner ring.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The details of the present invention will be described based on embodiments shown in the drawings.
[0013]
1 to 4 show an embodiment of the present invention. Here, a vehicle hub unit is taken as an example of the bearing device. FIG. 1 is a longitudinal side view of a hub unit for a vehicle, FIG. 2 is an enlarged view of a caulking portion of FIG. 1, FIG. 3 is a chart showing a change in an inner ring load during caulking, and FIG. It is a graph which shows the relationship between contact | adherence range and axial force.
[0014]
In the illustrated vehicle hub unit, reference numeral 1 denotes a hub wheel 1 as a shaft body, 1 denotes a double row outward angular ball bearing as a rolling bearing, and 3 denotes a caulking portion.
[0015]
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.
[0016]
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 portion 12a of the shaft portion 12, a single outer race 22 having two rows of race grooves. A plurality of balls 23 and two crown-shaped cages 24, 25 are provided, and the large-diameter portion 12b of the shaft portion 12 of the hub wheel 1 described above is configured as one inner ring. A radially outward flange 26 that is fixed to an axle case (not shown) or the like is provided on the outer periphery of the outer ring 22. Further, as is generally known, round chamfers are provided at corners at both axial ends of the inner peripheral surface of the inner ring 21 and corners at both axial ends of the outer peripheral surface of the outer ring 22.
[0017]
The caulking portion 3 is formed by bending the shaft end of the shaft portion 12 of the hub wheel 1 radially outward along the outer end surface of the inner ring 21 of the bearing 2.
[0018]
This embodiment is characterized by the shape of the caulking portion 3 of the shaft portion 12 of the hub wheel 1.
[0019]
Here, the caulking portion 3 is in close contact with a round chamfer provided at an outer corner portion of the inner peripheral surface of the inner ring 21, and is separated from the outer end surface 21a of the inner ring 21 connected to the chamfer.
[0020]
The contact range of the caulking portion 3 with respect to the chamfer is represented by an angle θ formed by two straight lines connecting the center of curvature P1 of the chamfer and the contact start point P2 and the contact end point P3 of the caulking portion 3 with respect to the chamfer, and the angle θ is 45. More than 90 degrees and less than 90 degrees are set. The reason why the upper and lower critical values are determined is related to the following caulking process and will be described later.
[0021]
Next, a caulking form when forming the caulking portion 3 described above will be described.
[0022]
The basic form of the caulking process in this embodiment is the same as the conventional example. That is, after the inner ring 21 is externally fitted to the small-diameter portion 12a of the shaft portion 12 of the hub wheel 1, the free end of the shaft portion 12 is subjected to rolling caulking using a caulking jig 90 as shown in FIG. . This caulking process is performed over a required time with a constant pressure.
[0023]
Then, at the initial stage where the required time t1 has elapsed since the start of rolling, the free end of the shaft portion 12 of the hub wheel 1 is bent radially outward to obtain the crimped portion 3 in a semi-finished state. Thereafter, the rolling is repeated for the required time t2. By adjusting the length t2 of the processing late period, the contact range of the caulking portion 3 with respect to the inner ring 21, that is, the angle θ can be managed.
[0024]
The change pattern of the load acting on the inner ring 21 in this caulking process is as shown in FIG. That is, for the machining initial time t1 from the point A to the point E at which machining starts, the load acting on the inner ring 21 rises sharply, and for the later machining later time t2 from the point E to the point F, the inner ring When the load acting on the inner ring 21 rises slowly, and then the caulking is finished, the load acting on the inner ring 21 sharply falls in two stages and is caulked with the required load applied to the inner ring 21. Held by part 3. This load is expressed as an axial force.
[0025]
Incidentally, when the diameter of the free end of the shaft 12 of the hub wheel 1 is set to 36 to 40 mm and the wall thickness is set to 2 to 5 mm, the applied pressure is set to 10 tons, the processing initial time t1 is set to about 1 second, and the processing late time t2 was about 3 seconds, and the total machining time was about 4 seconds. In this case, the contact range of the caulking portion 3 with respect to the inner ring 21, that is, the angle θ is 60 to 90 degrees, and the obtained axial force is 3500 to 4700 kgf.
[0026]
Here, the reason why the contact range of the caulking portion 3 with respect to the inner ring 21, that is, the angle θ, is specified as 45 to 90 degrees as described above will be described. That is, in order to set the lower limit value to less than 45 degrees, the machining late time t2 is shortened, but in that case, as shown in FIG. 4, the axial force required in the vehicle hub unit is not reached. On the other hand, in order to set it to exceed the upper limit of 90 degrees, the machining late time t2 is lengthened. In this case, as shown in FIG. In addition to being easily indented at the position, the obtained axial force does not increase and becomes saturated. For this reason, an appropriate range of a form in which the caulking portion 3 is in close contact with the inner ring 21 has been found.
[0027]
As described above, in the process of caulking the free end of the hub wheel 1 to obtain the caulking portion 3, the outer peripheral edge side of the caulking portion 3 is managed so as not to be pressed longer than necessary as in the conventional example. . As a result, an excessive load is not applied to the inner ring 21, so that no indentation is made on the raceway surface of the inner ring 21.
[0028]
In addition, this invention is not limited only to the said embodiment, Various application and deformation | transformation can be considered. For example, in the above-described embodiment, the vehicle hub unit is taken as an example of the bearing device. However, for example, a guide roller for a sliding door such as an automobile or other bearing devices in general can be used.
[0029]
【The invention's effect】
In the invention of claim 1 , by defining the contact range of the caulking portion with respect to the inner ring, in the process of obtaining the caulking portion, the load is not applied excessively to the inner ring as in the conventional example. After obtaining the axial force, it is possible to prevent the occurrence of indentation on the raceway surface of the inner ring and to ensure the operational stability of the rolling bearing.
[Brief description of the drawings]
FIG. 1 is a longitudinal side view of a vehicle hub unit according to an embodiment of the present invention. FIG. 2 is an enlarged view of a caulking portion in FIG. 1. FIG. 3 is a chart showing a change in an inner ring load during caulking. FIG. 5 is a longitudinal sectional side view of a conventional vehicle hub unit. FIG. 6 is an explanatory view showing a rolling caulking configuration.
A Vehicle hub unit 1 Hub wheel 12 Hub wheel shaft 2 Double row outward angular ball bearing 21 Bearing inner ring 21a Inner ring outer end surface 3 Caulking part P0 Center of curvature of inner ring chamfering point P1 Adhesion starting point P2 Caulking part Adhesion end point

Claims (1)

車輪が取り付けられる環状板部と軸部とを備えた軸体の軸部に転がり軸受を外嵌装着し、この軸部の一端側をかしめ治具によりローリングかしめすることにより径方向外向きに屈曲させて、この屈曲させたかしめ部を転がり軸受の内輪に対して押し付けることによって軸体に転がり軸受が抜け止め固定される軸受装置の製造方法であって、
前記かしめ部を形成するかしめ加工は、加圧力を一定にした状態で行われ、軸部の一端側を径方向外向きに屈曲して半完成状態のかしめ部が得られる加工初期時間ｔ１と、ローリングを繰り返す加工後期時間ｔ２とからなり、
前記かしめ部が、前記内輪の外端面に沿うように径方向外向きに屈曲され、前記内輪の内周面における一端側角部に設けられる丸い面取りに対しては密着され、前記内輪の面取りに連なる一端面に対しては離隔されるように、
前記加工初期時間ｔ１においては内輪に対して作用する荷重を急峻に立ち上げ、前記加工後期時間ｔ２においては内輪に対して作用する荷重を緩慢に立ち上げるとともに、
前記加工後期時間ｔ２の加工時間を調整することにより、かしめ部の内輪面取りに対する密着範囲が４５度〜９０度となるように管理したことを特徴とする軸受装置の製造方法。A rolling bearing is externally mounted on the shaft portion of a shaft body having an annular plate portion and a shaft portion to which the wheel is mounted, and one end side of this shaft portion is bent by a caulking jig to be bent radially outward. A method of manufacturing a bearing device in which the rolling bearing is secured to the shaft body by pressing the bent caulked portion against the inner ring of the rolling bearing,
The caulking process for forming the caulking part is performed in a state where the applied pressure is constant, and an initial processing time t1 at which one end side of the shaft part is bent radially outward to obtain a caulking part in a semi-finished state; It consists of the processing late time t2 that repeats rolling,
The caulking portion is bent radially outward along the outer end surface of the inner ring, and is in close contact with a round chamfer provided at one end side corner portion of the inner peripheral surface of the inner ring, for chamfering the inner ring. To be separated from one end face
At the machining initial time t1, the load acting on the inner ring is sharply raised, and at the machining late time t2, the load acting on the inner ring is slowly raised,
A method of manufacturing a bearing device, wherein the contact time range of the caulking portion with respect to the chamfering of the inner ring is controlled to be 45 to 90 degrees by adjusting the processing time of the latter processing time t2.
JP17529999A 1999-06-22 1999-06-22 Manufacturing method of bearing device Expired - Fee Related JP4178669B2 (en)

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JP4710179B2 (en) * 2001-07-03 2011-06-29 日本精工株式会社 Manufacturing method of bearing unit for wheel drive wheel
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