JPH1144319A - Pre-load applying device for bearing - Google Patents

Pre-load applying device for bearing

Info

Publication number
JPH1144319A
JPH1144319A JP9216996A JP21699697A JPH1144319A JP H1144319 A JPH1144319 A JP H1144319A JP 9216996 A JP9216996 A JP 9216996A JP 21699697 A JP21699697 A JP 21699697A JP H1144319 A JPH1144319 A JP H1144319A
Authority
JP
Japan
Prior art keywords
bearing
preload
tightening
inner ring
caulking
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.)
Pending
Application number
JP9216996A
Other languages
Japanese (ja)
Inventor
Chuichi Sato
忠一 佐藤
Hiroyuki Sawai
弘幸 沢井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NSK Ltd
Original Assignee
NSK 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 NSK Ltd filed Critical NSK Ltd
Priority to JP9216996A priority Critical patent/JPH1144319A/en
Publication of JPH1144319A publication Critical patent/JPH1144319A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/025—Special design or construction with rolling or wobbling dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • 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
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/52—Positive connections with plastic deformation, e.g. caulking or staking
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Support Of The Bearing (AREA)

Abstract

PROBLEM TO BE SOLVED: To properly secure a pre-load at assembling work for a bearing. SOLUTION: In a pre-load applying device of a bearing when calking work is started by gradually lowering a calking die of a swinging type calking device, a pre-load is applied to a combinational bearing from a certain time 10, and rotational torque T changes. When its change width reaches a preset prescribed width Δ, it is judged that the pre-load reaches a prescribed value, and calking work is finished. Therefore, a pre-load can be properly adjusted at calking work time of the combinational bearing.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、内輪を軸方向に締
め付けることにより、該内輪および外輪間に介在する転
動体に予圧を付与して軸受を組み立てる軸受の予圧付与
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing preloading device for assembling a bearing by preloading a rolling element interposed between an inner ring and an outer ring by tightening an inner ring in an axial direction.

【０００２】[0002]

【従来の技術】図９は従来の自動車用軸受ユニットの構
造を示す断面図である。自動車用軸受ユニットは、第２
内輪ａが一体に形成されたホイール軸ｂの端部に第１内
輪ｃを外嵌し、第１、第２内輪ｃ、ａおよび外輪ｄ間に
複列のボールｅを介在させることによって複列アンギュ
ラ玉軸受を形成する。この複列アンギュラ玉軸受では、
ホイール軸ｂの端部に形成されたねじ部にワッシャｆを
介してナットｇを締め付けることにより、第１内輪ｃを
介してボールｅに与えられる予圧を管理する。2. Description of the Related Art FIG. 9 is a sectional view showing the structure of a conventional automobile bearing unit. Automotive bearing unit
The first inner ring c is externally fitted to the end of the wheel axle b in which the inner ring a is integrally formed, and the multiple rows of balls e are interposed between the first and second inner rings c and a and the outer ring d to form a double row. Form angular contact ball bearings. In this double row angular contact ball bearing,
The preload applied to the ball e via the first inner ring c is managed by tightening a nut g via a washer f on a thread formed at an end of the wheel shaft b.

【０００３】そして、ナットｇに形成された切り欠き部
ｈの加締めを行い、弛み止めして軸受ユニットの組み立
てを完成させる。[0003] Then, the notch h formed in the nut g is caulked to prevent loosening, thereby completing the assembly of the bearing unit.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、上記従
来のように軸受ユニットを組み立てる場合、組立を完了
した後に予圧を測定してみなければ予圧が適正であるか
わからなかった。すなわち、ナットの締結具合によって
は予圧が過多となり、軸受剛性が高くなって組立軸受は
不良になってしまう。また一方、予圧が過少であると、
予圧抜けの原因になってしまう。However, when assembling the bearing unit as described above, it is not possible to determine whether the preload is appropriate unless the preload is measured after the assembly is completed. In other words, depending on the fastening condition of the nut, the preload becomes excessive, the rigidity of the bearing increases, and the assembled bearing becomes defective. On the other hand, if the preload is too low,
It may cause preload loss.

【０００５】そこで、本発明は軸受の組立加工時に予圧
量を適正に確保できる軸受の予圧付与装置を提供するこ
とを目的とする。SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a bearing preload applying device capable of properly securing a preload during assembly of a bearing.

【０００６】[0006]

【課題を解決するための手段】上記目的を達成するため
に、本発明の請求項１に記載の軸受の予圧付与装置は、
内輪を軸方向に締め付けることにより、該内輪および外
輪間に介在する転動体に予圧を付与して軸受を組み立て
る軸受の予圧付与装置において、前記内輪に対して行わ
れる締め付けを増加させる締付増加手段と、前記予圧を
検出する予圧検出手段と、該検出される予圧が所定値に
達したか否かを判別する予圧判別手段と、該予圧が所定
値に達した場合、前記内輪に対して行われる締め付けを
解除する締付解除手段とを備え、該締め付けの解除によ
り前記軸受の組み立てを完了することを特徴とする。In order to achieve the above object, a preloading device for a bearing according to claim 1 of the present invention comprises:
Tightening increasing means for increasing the tightening performed on the inner ring in a bearing preloading apparatus for assembling a bearing by applying a preload to a rolling element interposed between the inner ring and the outer ring by tightening the inner ring in the axial direction. Preload detecting means for detecting the preload, preload determining means for determining whether or not the detected preload has reached a predetermined value, and moving to the inner ring when the preload has reached a predetermined value. And a tightening release means for releasing the tightening, whereby the assembly of the bearing is completed by releasing the tightening.

【０００７】締付増加手段としては、軸を外嵌する内輪
に対して軸端部の加締めを行うことにより内輪を締め付
ける加締め装置であってもよいし、軸端部に形成された
ねじ部にナットを螺合させることにより内輪を締め付け
るものであってもよい。The tightening increasing means may be a caulking device for tightening the inner ring by caulking the shaft end to the inner ring on which the shaft is fitted, or a screw formed at the shaft end. The inner ring may be tightened by screwing a nut to the portion.

【０００８】予圧検出手段としては、軸受の回転トルク
の変動により予圧を検出するものでもよいし、軸受の固
有振動数を測定し、測定された固有振動数の変化により
予圧を検出するものでもよい。また、検出される予圧と
比較される所定値は、軸受剛性が高くなり過ぎず、かつ
予圧抜けが生じない適正な範囲内に設定される。The preload detecting means may be a means for detecting the preload based on the fluctuation of the rotational torque of the bearing, or a means for measuring the natural frequency of the bearing and detecting the preload based on a change in the measured natural frequency. . Further, the predetermined value to be compared with the detected preload is set within an appropriate range in which the bearing stiffness does not become too high and preload loss does not occur.

【０００９】[0009]

【発明の実施の形態】本発明の軸受の予圧付与装置の実
施の形態について説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bearing preload applying device according to the present invention will be described.

【００１０】［第１の実施形態］図１は組合せ軸受の構
造を示す図である。自動車用ホイール軸受として用いら
れる組合せ軸受１０は、内周に複列の転走面１１ａ、１
１ｂが形成された外輪１１、外輪１１の転走面１１ｂに
対向する転走面１２ａが外周に形成された第１内輪１
２、外輪１１の転走面１１ａに対向する転走面１３ａが
外周に形成され、かつ第１内輪１２が圧入される圧入部
１３ｃを連設したホイール軸として一体に形成された第
２内輪１３、外輪１１と第１内輪１２および第２内輪１
３との間に設けられたボール１４ａ、１４ｂが組み合わ
された構造を有する。[First Embodiment] FIG. 1 is a view showing the structure of a combination bearing. A combination bearing 10 used as an automobile wheel bearing has a double row of rolling surfaces 11a, 1
The outer race 11 having the outer race 1b formed thereon, and the first inner race 1 having a rolling surface 12a opposed to the rolling surface 11b of the outer race 11 formed on the outer periphery.
2. A second inner race 13 integrally formed as a wheel shaft having a rolling surface 13a facing the rolling surface 11a of the outer race 11 formed on the outer periphery thereof and a press-fit portion 13c into which the first inner race 12 is press-fitted. , Outer ring 11, first inner ring 12, and second inner ring 1
3 has a structure in which the balls 14a and 14b provided between them are combined.

【００１１】第２内輪１３の軸端部１３ｅには凹部１３
ｆが形成されており、後述する揺動型加締め装置２１の
かしめ型２６ａと対向している。また、外輪１１および
第２内輪１３には、それぞれフランジ部１１ｃおよびフ
ランジ部１３ｄが形成されている。A recess 13 is formed at the shaft end 13e of the second inner ring 13.
f is formed, and faces the caulking mold 26a of the swing-type caulking device 21 described later. Further, a flange portion 11c and a flange portion 13d are formed on the outer race 11 and the second inner race 13, respectively.

【００１２】図２は揺動型加締め装置のワーク保持台に
組合せ軸受が固定された状態を示す断面図である。揺動
型加締め装置２１は、フランジ部１３ｄをボルト１８で
締め付けることにより組合せ軸受１０を固定するワーク
保持台２３、ワーク保持台２３に立設する部材２４に取
り付けられ、回転時に組合せ軸受１０の振れ止めを行う
振れ止め板２５、かしめ型２６ａが取り付けられた押圧
部２６を有する。FIG. 2 is a sectional view showing a state in which the combined bearing is fixed to the work holding table of the swing type caulking device. The swing type caulking device 21 is attached to a work holder 23 for fixing the combined bearing 10 by fastening the flange portion 13 d with a bolt 18, and a member 24 erected on the work holder 23. It has a steady portion 25 for performing steady rest and a pressing portion 26 to which a caulking mold 26a is attached.

【００１３】このような揺動型加締め装置２１では、押
圧部２６は組合せ軸受１０の軸に対し僅かな傾きθを持
って取り付けられており、揺動回転しながら軸端部１３
ｅに接近して凹部１３ｆに収納されるかしめ型２６ａに
よって軸端部１３ｅを内側から押圧する。In such a swing type caulking device 21, the pressing portion 26 is attached with a slight inclination θ with respect to the shaft of the combined bearing 10, and the shaft end portion 13 is rotated while swinging.
The shaft end 13e is pressed from the inside by the caulking mold 26a housed in the recess 13f approaching to the shaft e.

【００１４】かしめ型２６ａによって押圧された軸端部
１３ｅは、第１内輪１２によって外径側から拘束を受け
た状態でかしめ型２６ａの形状を凹部１３ｆの空間に充
満させる形で徐々に変形する。軸端部１３ｅの変形によ
って第１内輪１２は軸方向に押し込まれて締め付けられ
る。これにより、第１内輪１２の転走面１２ａと第２内
輪１３の転走面１３ａとが接近するので、外輪１１と転
動体１４ａ、１４ｂとの間に隙間がなくなり、第１、第
２内輪１２、１３および外輪１１間に介在する転動体１
４ａ、１４ｂ間に予圧が発生する。予圧量が予め設定さ
れた所定値に達すると、揺動型加締め装置２１を後退さ
せて加締め加工を終了する。図２では、加締め加工が終
了した状態が示されている。The shaft end 13e pressed by the caulking mold 26a is gradually deformed so as to fill the space of the recess 13f with the shape of the caulking mold 26a while being restrained by the first inner ring 12 from the outer diameter side. . Due to the deformation of the shaft end 13e, the first inner ring 12 is pushed in the axial direction and tightened. As a result, the rolling surface 12a of the first inner race 12 and the rolling surface 13a of the second inner race 13 approach each other, so that there is no gap between the outer race 11 and the rolling elements 14a, 14b, and the first and second inner races are eliminated. Rolling element 1 interposed between 12, 13 and outer ring 11
A preload is generated between 4a and 14b. When the preload amount reaches a predetermined value, the swing type caulking device 21 is retracted, and the caulking process is completed. FIG. 2 shows a state in which the crimping process has been completed.

【００１５】図３は組合せ軸受１０に取り付けられた予
圧モニタ装置の構成を概略的に示す図である。予圧モニ
タ装置３０は、フランジ部１１ｃ上方の外輪１１側面と
接触するゴム部材が取り付けられた歯車３２、歯車３２
と歯合する外輪回転用歯車３３、歯車３３を回転駆動す
るモータ（Ｍ）３４、モータ３４の回転トルクを検出す
るトルク検出器（Ｔ）３５、および検出された回転トル
クを予め設定された所定値と比較する判定器３６を有す
る。トルク検出器３５としては、電力計が用いられる。FIG. 3 is a diagram schematically showing a configuration of a preload monitoring device mounted on the combination bearing 10. As shown in FIG. The preload monitoring device 30 includes a gear 32 and a gear 32 each having a rubber member attached thereto that comes into contact with the side surface of the outer ring 11 above the flange portion 11c.
An outer ring rotation gear 33 meshing with the motor, a motor (M) 34 for driving the rotation of the gear 33, a torque detector (T) 35 for detecting the rotation torque of the motor 34, and a detection of the detected rotation torque in a predetermined manner. It has a determiner 36 for comparing with a value. As the torque detector 35, a power meter is used.

【００１６】予圧モニタ装置３０では、モータ３４を駆
動し、歯車３３、３２を介して外輪１１を回転させ、外
輪１１の回転トルクをトルク検出器３５で検出し、検出
された回転トルクに基づいて予圧を測定し、測定された
予圧が予め設定された所定値、つまり組合せ軸受１０に
適した予圧に達した場合、揺動型加締め装置２１を後退
させる。In the preload monitoring device 30, the motor 34 is driven to rotate the outer ring 11 through the gears 33 and 32, the rotation torque of the outer ring 11 is detected by the torque detector 35, and based on the detected rotation torque. The preload is measured, and when the measured preload reaches a predetermined value set in advance, that is, a preload suitable for the combined bearing 10, the rocking-type caulking device 21 is retracted.

【００１７】そして、揺動型加締め装置２１による加締
め加工を終了した後も回転トルクを監視して予圧量が適
正であることを確認する。After the crimping by the swing type crimping device 21, the rotational torque is monitored to confirm that the preload amount is appropriate.

【００１８】図４は加締め加工時間ｔに対する揺動型加
締め装置２１の加締め型２６ａの位置および回転トルク
Ｔの変化を示すグラフである。揺動型加締め装置２１の
加締め型２６ａの位置Ａを徐々に降下させて加締め加工
を開始すると、ある時点ｔ０から組合せ軸受１０に予圧
が加わり回転トルクＴが変動し始める。その変動幅が予
め設定された所定幅Δにまで達すると（時点ｔ１）、組
合せ軸受１０に適した予圧が加わったと判断して加締め
加工を終了する。これにより、加締め型２６ａの位置Ａ
を原点に復帰させる。FIG. 4 is a graph showing the change of the rotational torque T and the position of the crimping die 26a of the swing type crimping device 21 with respect to the crimping processing time t. When the crimping process is started by gradually lowering the position A of the crimping die 26a of the swing type crimping device 21, the preload is applied to the combined bearing 10 from a certain time point t0, and the rotational torque T starts to fluctuate. When the variation width reaches a predetermined width Δ (time point t1), it is determined that a preload suitable for the combined bearing 10 has been applied, and the crimping process ends. Thereby, the position A of the caulking mold 26a is
To the origin.

【００１９】このように、本実施形態の軸受の予圧付与
装置では、組合せ軸受１０の加締め加工時に予圧量を適
正に付与することができる。したがって、加締め不足、
加締め過ぎといった軸受の性能上、不都合な不良品の発
生を防止できる。As described above, in the bearing preload applying device of the present embodiment, the preload amount can be appropriately applied at the time of crimping of the combined bearing 10. Therefore, insufficient caulking,
It is possible to prevent the occurrence of inferior defective products in terms of bearing performance such as excessive caulking.

【００２０】図５は外輪１１を回転させる他の機構を示
す図である。モータ１３４の軸先端部には側面にゴム部
材が固着されたドライブホイール１３５が取り付けられ
ている。ドライブホイール１３５は外輪１１の軸方向の
端面に接触しており、モータ１３５の回転動力を伝達し
て外輪１１を回転させる。FIG. 5 is a view showing another mechanism for rotating the outer race 11. As shown in FIG. A drive wheel 135 having a rubber member fixed to the side surface is attached to the shaft tip of the motor 134. The drive wheel 135 is in contact with the axial end surface of the outer ring 11 and transmits the rotational power of the motor 135 to rotate the outer ring 11.

【００２１】［第２の実施形態］前記第１の実施形態で
は、外輪１１の回転トルクを検出することにより組合せ
軸受１０の予圧を測定していたが、第２の実施形態では
外輪１１の振動を検出することにより予圧を測定する。
組合せ軸受１０および揺動型加締め装置２１の構造につ
いては前記第１の実施形態と同様である。[Second Embodiment] In the first embodiment, the preload of the combined bearing 10 is measured by detecting the rotational torque of the outer ring 11, but the vibration of the outer ring 11 is measured in the second embodiment. The preload is measured by detecting.
The structures of the combination bearing 10 and the swing type caulking device 21 are the same as those of the first embodiment.

【００２２】図６は第２の実施形態における予圧モニタ
装置の構成を示す図である。この予圧モニタ装置４０
は、加振器４１、加振用アンプ４２、速度型振動センサ
５１、ＦＦＴスペクトル周波数分析器５５および予圧判
定器５６から構成される。予圧判定器５６には、差分演
算器５７、比較器５８および信号発生器５９が設けられ
ている。FIG. 6 is a diagram showing the configuration of the preload monitoring device according to the second embodiment. This preload monitoring device 40
Is composed of a vibrator 41, a vibration amplifier 42, a velocity vibration sensor 51, an FFT spectrum frequency analyzer 55, and a preload determiner 56. The preload determiner 56 includes a difference calculator 57, a comparator 58, and a signal generator 59.

【００２３】速度型振動センサ（ムービングピックアッ
プ）５１は外輪１１のフランジ部１１ｃの下面に取り付
けられており、加振器４１によって与えられる振動を外
輪１１を介して検知する。A speed-type vibration sensor (moving pickup) 51 is mounted on the lower surface of the flange portion 11c of the outer ring 11, and detects vibration given by the vibrator 41 through the outer ring 11.

【００２４】速度型振動センサ５１によって検知された
軸受の剛性に基づく振動信号は、ＦＦＴスペクトル周波
数分析器５５に入力される。周波数分析器５５は速度型
振動センサ５１からの振動信号を分析して振動スペクト
ルを取得し、取得した振動スペクトルに基づき、縦軸を
組合せ軸受１０のコンプライアンスＣ、横軸を周波数ｆ
とするコンプライアンス曲線を得る。図７は縦軸を組合
せ軸受１０のコンプライアンスＣ、横軸を周波数ｆとす
るコンプライアンス曲線を示すグラフである。A vibration signal based on the rigidity of the bearing detected by the speed-type vibration sensor 51 is input to the FFT spectrum frequency analyzer 55. The frequency analyzer 55 analyzes the vibration signal from the speed-type vibration sensor 51 to obtain a vibration spectrum, and based on the obtained vibration spectrum, the vertical axis indicates the compliance C of the combined bearing 10 and the horizontal axis indicates the frequency f.
Is obtained. FIG. 7 is a graph showing a compliance curve with the vertical axis representing the compliance C of the combined bearing 10 and the horizontal axis representing the frequency f.

【００２５】前記第１の実施形態における図４と同様
に、加締め加工時間ｔの経過につれて加締め型２６ａの
位置Ａを降下させると、回転トルクＴの場合と同様にあ
る時点ｔ０から組合せ軸受１０の固有振動数が高くな
り、コンプライアンスＣのピーク周波数も高くなる。加
締めを強くする程、組合せ軸受１０の軸受隙間が減少す
るので、組合せ軸受１０の固有振動数、すなわちコンプ
ライアンスＣのピーク周波数は高い方にシフトする。図
７において、実線および点線はそれぞれ組合せ軸受１０
に予圧が加わる前後のコンプライアンス曲線を示す。As shown in FIG. 4 in the first embodiment, when the position A of the crimping die 26a is lowered with the elapse of the crimping processing time t, the combined bearing starts at a certain time t0 as in the case of the rotational torque T. The natural frequency of 10 increases, and the peak frequency of compliance C also increases. As the caulking becomes stronger, the bearing gap of the combined bearing 10 decreases, so that the natural frequency of the combined bearing 10, that is, the peak frequency of the compliance C shifts to a higher one. In FIG. 7, the solid line and the dotted line indicate the combination bearing 10 respectively.
Shows the compliance curves before and after the preload is applied.

【００２６】差分演算器５７は予圧が加わる前の組合せ
軸受１０の固有振動数と予圧が加わった後の固有振動数
との差分、つまり変化幅Δｆを演算する（図７参照）。
比較器５８は、固有振動数の変化幅Δｆが予め設定され
た組合せ軸受１０の適正な予圧量に相当する幅に達した
か否かを判定する。達していると判定された場合、信号
発生器５９は加締め終了信号を出力する。この加締め終
了信号により、揺動型加締め装置２１の加締め型２６ａ
の位置Ａを原点に復帰させる。The difference calculator 57 calculates a difference between the natural frequency of the combined bearing 10 before the preload is applied and the natural frequency after the preload is applied, that is, a change width Δf (see FIG. 7).
The comparator 58 determines whether or not the change width Δf of the natural frequency has reached a width corresponding to an appropriate preload amount of the combination bearing 10 set in advance. If it is determined that the temperature has reached, the signal generator 59 outputs a caulking end signal. In response to the caulking end signal, the caulking mold 26a of the swing type caulking device 21 is used.
Is returned to the origin.

【００２７】このように、第２の実施形態の軸受の予圧
付与装置では、前記第１の実施形態と同様に組合せ軸受
の加締め加工時に予圧量を適正に付与することができ
る。As described above, in the bearing preload applying device according to the second embodiment, the preload amount can be appropriately applied at the time of crimping of the combined bearing, as in the first embodiment.

【００２８】尚、本実施形態では、加振器および振動セ
ンサをそれぞれフランジ部１１ｃの上下端面に取り付け
たが、外輪１１の側面に取り付けるようにしてもよい。
図８は外輪１１の側面に取り付けられた加振器および振
動センサの配置を示す図である。振動センサ１４１は速
度型振動センサであり、フランジ部１１ｃ上方の外輪１
１の側面に取り付けられている。一方、加振器１４１は
油圧式加振器であり、フランジ部１１ｃ下方の外輪１１
の側面に取り付けられている。加振器としては、油圧式
のものに限らず、電動式のものでもよい。In this embodiment, the vibrator and the vibration sensor are respectively mounted on the upper and lower end surfaces of the flange portion 11c, but they may be mounted on the side surface of the outer race 11.
FIG. 8 is a diagram showing an arrangement of a vibrator and a vibration sensor attached to the side surface of the outer ring 11. The vibration sensor 141 is a speed-type vibration sensor, and the outer ring 1 above the flange portion 11c.
It is attached to one side. On the other hand, the vibrator 141 is a hydraulic vibrator, and the outer ring 11 below the flange portion 11c.
It is attached to the side of. The vibrator is not limited to the hydraulic type, but may be an electric type.

【００２９】[0029]

【発明の効果】本発明の請求項１に記載の軸受の予圧付
与装置によれば、内輪を軸方向に締め付けることによ
り、該内輪および外輪間に介在する転動体に予圧を付与
して軸受を組み立てる際、締付増加手段により前記内輪
に対して行われる締め付けを増加させながら、予圧検出
手段により前記予圧を検出し、予圧判別手段により該検
出される予圧が所定値に達したか否かを判別し、該予圧
が所定値に達した場合、締付解除手段により前記内輪に
対して行われる締め付けを解除し、該締め付けの解除に
より前記軸受の組み立てを完了するので、軸受の組立加
工時に予圧量を適正に確保することができる。According to the preloading device for a bearing according to the first aspect of the present invention, by prestressing the rolling element interposed between the inner ring and the outer ring by tightening the inner ring in the axial direction, the bearing is mounted. When assembling, the preload detecting means detects the preload while increasing the tightening performed on the inner ring by the tightening increasing means, and determines whether the detected preload has reached a predetermined value by the preload determining means. When the preload reaches a predetermined value, the tightening performed on the inner ring is released by the tightening release means, and the assembly of the bearing is completed by the release of the tightening. The amount can be properly secured.

【００３０】したがって、軸端部を加締めることによっ
て予圧量を調節する軸受ユニットの場合、加締め不足、
加締め過ぎといった軸受の性能上、不都合な不良品の発
生を防止できる。Therefore, in the case of a bearing unit in which the amount of preload is adjusted by caulking the shaft end, insufficient caulking,
It is possible to prevent the occurrence of inferior defective products in terms of bearing performance such as excessive caulking.

【図面の簡単な説明】[Brief description of the drawings]

【図１】組合せ軸受の構造を示す図である。FIG. 1 is a view showing a structure of a combination bearing.

【図２】揺動型加締め装置のワーク保持台に組合せ軸受
が固定された状態を示す断面図である。FIG. 2 is a cross-sectional view showing a state in which a combined bearing is fixed to a work holding table of the swing type caulking device.

【図３】組合せ軸受１０に取り付けられた予圧モニタ装
置の構成を概略的に示す図である。FIG. 3 is a view schematically showing a configuration of a preload monitoring device attached to the combination bearing 10;

【図４】加締め加工時間ｔに対する揺動型加締め装置の
加締め位置および回転トルクの変化を示すグラフであ
る。FIG. 4 is a graph showing a change in a crimping position and a rotational torque of the swing type crimping device with respect to a crimping processing time t.

【図５】外輪１１を回転させる他の機構を示す図であ
る。FIG. 5 is a view showing another mechanism for rotating the outer race 11;

【図６】第２の実施形態における予圧モニタ装置の構成
を示す図である。FIG. 6 is a diagram illustrating a configuration of a preload monitoring device according to a second embodiment.

【図７】縦軸を組合せ軸受１０のコンプライアンスＣ、
横軸を周波数ｆとするコンプライアンス曲線を示すグラ
フである。FIG. 7 shows the compliance C of the combined bearing 10 on the vertical axis.
It is a graph which shows a compliance curve which makes a horizontal axis frequency f.

【図８】外輪１１の側面に取り付けられた加振器および
振動センサの配置を示す図である。FIG. 8 is a diagram showing an arrangement of a vibrator and a vibration sensor attached to a side surface of an outer ring 11;

【図９】従来の自動車用軸受ユニットの構造を示す断面
図である。FIG. 9 is a sectional view showing the structure of a conventional automobile bearing unit.

【符号の説明】[Explanation of symbols]

１０ 組合せ軸受 １１ 外輪 １２ 第１内輪 １３ 第２内輪 １４ａ、１４ｂ ボール ２１ 揺動型加締め装置 ２６ａ かしめ型 ３４ モータ ３５ トルク検出器 ３６ 判定器 ４１ 加振器 ５１ 振動センサ ５５ 周波数分析器 ５６ 予圧判定器 DESCRIPTION OF SYMBOLS 10 Combination bearing 11 Outer ring 12 1st inner ring 13 2nd inner ring 14a, 14b Ball 21 Swing type caulking device 26a Caulking type 34 Motor 35 Torque detector 36 Judge 41 Shaker 51 Vibration sensor 55 Frequency analyzer 56 Preload judgment vessel

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 内輪を軸方向に締め付けることにより、
該内輪および外輪間に介在する転動体に予圧を付与して
軸受を組み立てる軸受の予圧付与装置において、 前記内輪に対して行われる締め付けを増加させる締付増
加手段と、 前記予圧を検出する予圧検出手段と、 該検出される予圧が所定値に達したか否かを判別する予
圧判別手段と、 該予圧が所定値に達した場合、前記内輪に対して行われ
る締め付けを解除する締付解除手段とを備え、 該締め付けの解除により前記軸受の組み立てを完了する
ことを特徴とする軸受の予圧付与装置。1. By tightening the inner ring in the axial direction,
A preloading device for a bearing for assembling a bearing by applying a preload to a rolling element interposed between the inner ring and the outer ring, comprising: a tightening increasing unit configured to increase tightening performed on the inner ring; and a preload detection detecting the preload. Means, preload discriminating means for discriminating whether or not the detected preload has reached a predetermined value, and tightening releasing means for releasing tightening performed on the inner ring when the preload has reached a predetermined value. And a bearing preload applying device, wherein the assembly of the bearing is completed by releasing the tightening.
JP9216996A 1997-07-29 1997-07-29 Pre-load applying device for bearing Pending JPH1144319A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9216996A JPH1144319A (en) 1997-07-29 1997-07-29 Pre-load applying device for bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9216996A JPH1144319A (en) 1997-07-29 1997-07-29 Pre-load applying device for bearing

Related Child Applications (2)

Application Number Title Priority Date Filing Date
JP2005069740A Division JP2005201456A (en) 2005-03-11 2005-03-11 Assembling method of rolling bearing unit for supporting wheel
JP2005191217A Division JP2005282866A (en) 2005-06-30 2005-06-30 Assembling method of rolling bearing unit for supporting wheel

Publications (1)

Publication Number Publication Date
JPH1144319A true JPH1144319A (en) 1999-02-16

Family

ID=16697190

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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