JPH01112019A - Bearing pre-load detecting method - Google Patents
Bearing pre-load detecting methodInfo
- Publication number
- JPH01112019A JPH01112019A JP62268971A JP26897187A JPH01112019A JP H01112019 A JPH01112019 A JP H01112019A JP 62268971 A JP62268971 A JP 62268971A JP 26897187 A JP26897187 A JP 26897187A JP H01112019 A JPH01112019 A JP H01112019A
- Authority
- JP
- Japan
- Prior art keywords
- preload
- wave
- amplitude
- amount
- bearing
- 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
Links
- 230000036316 preload Effects 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims description 9
- 238000001514 detection method Methods 0.000 abstract description 10
- 238000005096 rolling process Methods 0.000 description 7
- 238000012790 confirmation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Support Of The Bearing (AREA)
Abstract
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、軸受の予圧量検出方法に関する。[Detailed description of the invention] Industrial applications The present invention relates to a method for detecting the amount of preload on a bearing.
従来の技術とその問題点
円すいころ軸受や玉軸受などのころがり軸受は適当なア
キシアル予圧を与えて使用することがあり、この場合に
は、予圧の大きさ（予圧量）の管理が重要になる。軸受
組込み時にアキシアル予圧を与える場合の予圧の管理は
、従来、予圧を与えるナツトの締付はトルクまたは締付
は後の起動トルクでもって行われている。そして、締付
はトルクで管理する場合でも、ばらつきがあるため、起
動トルクを測定して最終確認を行なっている。Conventional technology and its problems Rolling bearings such as tapered roller bearings and ball bearings are sometimes used with an appropriate axial preload applied, and in this case, it is important to control the size of the preload (preload amount). . Conventionally, preload management when applying axial preload when assembling a bearing has been performed by tightening a nut that applies preload with torque or by using later starting torque. Even when tightening is managed using torque, there are variations, so starting torque is measured for final confirmation.
このため、適正予圧設定には、締付け、起動の繰返しが
必要であり、作業は面倒で時間がかかる。Therefore, setting the appropriate preload requires repeated tightening and starting, which is a cumbersome and time-consuming process.
この発明の目的は、上記の問題を解決し、適正予圧設定
を容易に能率良く行なうことを可能にする軸受の予圧量
検出方法を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for detecting a preload amount of a bearing, which solves the above-mentioned problems and makes it possible to easily and efficiently set an appropriate preload.
問題点を解決するための手段
この発明による軸受の予圧量検出方法は、軸受を回転さ
せた状態で、すべり接触面から発生するＡＥ波をＡＥセ
ンサにより検出し、このＡＥ波の振幅にもとづいて予圧
量を求めることを特徴とするものである。Means for Solving the Problems The method for detecting the preload amount of a bearing according to the present invention detects an AE wave generated from a sliding contact surface with an AE sensor while the bearing is rotating, and then detects the amount of preload based on the amplitude of the AE wave. This method is characterized by determining the amount of preload.
なお、この明細書において、ＡＥという用語はアコース
ティックエミッション（ＡｃｏｕｓｔｉｃＥａ＋１ｓｓ
ｌｏｎ）の略語として用いられる。In this specification, the term AE refers to acoustic emission (AcousticEa+1ss
lon) is used as an abbreviation.
作 用
発明者らは、研究の結果、アキシアル予圧が与えられた
ころがり軸受が回転するとすべり接触面から予圧量に応
じた振幅のＡＥ波（弾性波）が発生することを見出し、
この発明を完成した。As a result of research, the inventors discovered that when a rolling bearing with axial preload rotates, an AE wave (elastic wave) with an amplitude corresponding to the amount of preload is generated from the sliding contact surface.
completed this invention.
すなわち、ころがり軸受にアキシアル予圧が負荷される
と、転動体と軌道輪の接触面に応力が生じる。また、す
べり接触面では、ＡＥ波が発生し、すべり接触面の応力
が大きいほどＡＥ波の振幅が大きい。したがって、すべ
り接触面から発生するＡＥ波の振幅より、予圧量が求め
られる。That is, when an axial preload is applied to the rolling bearing, stress is generated on the contact surface between the rolling elements and the bearing ring. Furthermore, AE waves are generated on the sliding contact surface, and the greater the stress on the sliding contact surface, the larger the amplitude of the AE wave. Therefore, the amount of preload can be determined from the amplitude of the AE wave generated from the sliding contact surface.
そして、ＡＥ波の振幅にもとづいて予圧量を求めるので
、軸受を回転させた状態で、ＡＥ波の振幅をみながら、
ナツトを締付けて、適正予圧に設定することができる。Since the amount of preload is determined based on the amplitude of the AE wave, while the bearing is rotating, while checking the amplitude of the AE wave,
The nut can be tightened to set the appropriate preload.
このため、従来のような締付け、起動の繰返しが不要で
あり、適正予圧設定作業が容易で能率が良い。また、Ａ
Ｅ波の振幅で予圧量がわかるので、予圧量は後の再予圧
設定時にも、ＡＥ波の振幅を同レベルにするだけでよく
、作業が簡易である。Therefore, there is no need to repeat tightening and starting as in the conventional case, and the work of setting an appropriate preload is easy and efficient. Also, A
Since the amount of preload can be determined from the amplitude of the E wave, the amount of preload only needs to be set to the same level as the amplitude of the AE wave even when resetting the preload later, which simplifies the work.
実 施 例
図面は、円すいころ軸受（１０）とその予圧量検出装置
（１１）の構成を示す。The drawings of the embodiment show the configuration of a tapered roller bearing (10) and its preload amount detection device (11).
軸受（１０）の内輪（１２）は回転軸（１３）に固定さ
れ、外輪（１４）はハウジング（１５）内にはめられた
スリーブ（１Ｂ）に固定されている。そして、ハウジン
グ（１５）の端部にねじはめられたナツト（１７）を締
付けることにより軸受（１０）にアキシアル予圧が与え
られ、ナツト（１７）の締付は量により予圧量が調整さ
れる。The inner ring (12) of the bearing (10) is fixed to a rotating shaft (13), and the outer ring (14) is fixed to a sleeve (1B) fitted in a housing (15). Axial preload is applied to the bearing (10) by tightening a nut (17) screwed into the end of the housing (15), and the amount of preload is adjusted by tightening the nut (17).
予圧量検出装置（１１）は、軸受（１０）のすべり接触
面から発生するＡＥ波を検出するＡＥセンサ（１８）を
備えている。このセンサ（１８）は圧電素子よりなる音
響−電気変換素子であり、軸受（１０）の近くの固定部
分の適当箇所たとえばハウジング（１５）などに取付け
られる。The preload amount detection device (11) includes an AE sensor (18) that detects AE waves generated from the sliding contact surface of the bearing (10). This sensor (18) is an acoustic-electric transducer made of a piezoelectric element, and is attached to a suitable location on a fixed part near the bearing (10), such as the housing (15).
ＡＥセンサ（１８）の出力信号（ＡＥ倍信号はプリアン
プ（１９）で増幅され、帯域フィルタ（２０）でノイズ
を除去されたのち、包絡線検波回路（２１）で包絡線検
波されて、ＡＥ波の振幅に比例する信号に変換される。The output signal (AE multiplied signal) of the AE sensor (18) is amplified by the preamplifier (19), noise is removed by the bandpass filter (20), and then envelope detected by the envelope detection circuit (21) to generate the AE wave. is converted into a signal proportional to the amplitude of
そして、この包路線検波回路（２１）の出力すなわちＡ
Ｅ波の振幅がＡＥ波振幅表示装置（２２）に表示される
。The output of this envelope detection circuit (21), that is, A
The amplitude of the E wave is displayed on the AE wave amplitude display device (22).
回転軸（１３）すなわち内輪（１２）が回転している状
態で、軸受（１０）にアキシアル予圧が負荷されると、
ころ（２３）と内輪（１２）および外輪（１４）の軌道
とのころがり接触面（Ａ）ならびにこる（２３）と内輪
（１２）の大つば（２４）とのすべり接触面（Ｂ）に応
力が生じる。この応力は予圧量に対応し、予圧量が大き
いほど大きい。また、すべり接触面（Ｂ）では、すべり
によりＡＥ波が発生する。このＡＥ波の振幅はすべり接
触面（Ｂ）の応力に対応し、応力が大きいほど大きい。When an axial preload is applied to the bearing (10) while the rotating shaft (13), that is, the inner ring (12) is rotating,
Stress is applied to the rolling contact surface (A) between the rollers (23) and the raceways of the inner ring (12) and outer ring (14), and the sliding contact surface (B) between the rollers (23) and the large collar (24) of the inner ring (12). occurs. This stress corresponds to the amount of preload, and increases as the amount of preload increases. Further, on the sliding contact surface (B), AE waves are generated due to sliding. The amplitude of this AE wave corresponds to the stress on the sliding contact surface (B), and the larger the stress is, the larger it is.
これより、ＡＥ波の振幅は予圧量に対応し、予圧量が大
きいほど大きいことがわかる。したがって、すべり接触
面（Ｂ）から発生するＡＥ波の振幅より、軸受（１０）
の予圧量が求められる。From this, it can be seen that the amplitude of the AE wave corresponds to the amount of preload, and increases as the amount of preload increases. Therefore, from the amplitude of the AE wave generated from the sliding contact surface (B), the bearing (10)
The amount of preload is required.
軸受（１０）組込み時に予圧を設定する場合、ＡＥセン
サ（１８）をハウジング（１５）などに取付け、予圧量
検出装置（１１）を作動させる。一方、ナツト（１７）
を適当に軽く締めて、軸（１３）を回転させる。そして
、軸（１３）を回転させた状態で、表示装置（２２）の
ＡＥ波の振幅を見ながら、ナツト（１７）の締付けを調
整する。When setting the preload when assembling the bearing (10), the AE sensor (18) is attached to the housing (15) or the like, and the preload amount detection device (11) is activated. On the other hand, Natsuto (17)
Lightly tighten the screws and rotate the shaft (13). Then, while the shaft (13) is being rotated, the tightening of the nut (17) is adjusted while viewing the amplitude of the AE wave on the display device (22).
このように、上記の予圧量検出装置（１１）を用いれば
、軸受（１０）を回転させた状態で、ＡＥ波の振幅をみ
ながら、ナツト（１７）を締付けて、適正予圧に設定す
ることができる。このため、従来のような締付け、起動
の繰返しが不要であり、適正予圧設定作業が容易で能率
が良い。また、ＡＥ波の振幅で予圧量がわかるので、予
圧量は後の再予圧設定時にも、ＡＥ波の振幅を同レベル
にするだけでよく、作業が簡易である。In this way, by using the above preload amount detection device (11), it is possible to set the appropriate preload by tightening the nut (17) while checking the amplitude of the AE wave while the bearing (10) is rotating. Can be done. Therefore, there is no need to repeat tightening and starting as in the conventional case, and the work of setting an appropriate preload is easy and efficient. Furthermore, since the amount of preload can be determined from the amplitude of the AE wave, the amount of preload only needs to be set to the same level when resetting the preload later, which simplifies the work.
この発明による方法は、玉軸受にも適用できる。玉軸受
の場合、玉と軌道輪は主としてころがり接触をするが、
わずかなすべり接触も生じ、接触面からＡＥ波が発生す
る。そして、予圧量が変わると、これに応じて、すべり
率が変わり、ＡＥ波の振幅も変化する。したがって、こ
の場合も、ＡＥ波の振幅により、予圧量を検出すること
ができる。The method according to the invention can also be applied to ball bearings. In the case of ball bearings, the balls and raceway mainly make rolling contact, but
A slight sliding contact also occurs, and AE waves are generated from the contact surface. When the amount of preload changes, the slip rate changes and the amplitude of the AE wave changes accordingly. Therefore, in this case as well, the amount of preload can be detected based on the amplitude of the AE wave.
発明の効果
この発明の方法、によれば、ＡＥ波の振幅にもとづいて
予圧量を求めるので、軸受を回転させた状態で、ＡＥ波
の振幅をみながら、ナツトを締付けて、適正予圧に設定
することができる。Effects of the Invention According to the method of the present invention, the amount of preload is determined based on the amplitude of the AE wave, so while the bearing is rotating, the nut is tightened while checking the amplitude of the AE wave to set the appropriate preload. can do.
このため、従来のような締付け、起動の繰返しが不要で
あり、適正予圧設定作業が容易で能率が良い。また、Ａ
Ｅ波の振幅で予圧量がわかるので、予圧量は後の再予圧
設定時にも、ＡＥ波の振幅を同レベルにするだけでよく
、作業が簡易である。Therefore, there is no need to repeat tightening and starting as in the conventional case, and the work of setting an appropriate preload is easy and efficient. Also, A
Since the amount of preload can be determined from the amplitude of the E wave, the amount of preload only needs to be set to the same level as the amplitude of the AE wave even when resetting the preload later, which simplifies the work.
図面は、この発明の実施例を示すころがり軸受の予圧量
検出装置の構成図である。
（１０）・・・円すいころ軸受、（１１）・・・予圧量
検出装置、（１８）・・・ＡＥセンサ、（Ｂ）・・・す
べり接触面。
以 上The drawing is a configuration diagram of a preload amount detection device for a rolling bearing showing an embodiment of the present invention. (10)...Tapered roller bearing, (11)...Preload amount detection device, (18)...AE sensor, (B)...Sliding contact surface. that's all
Claims (1)
Ｅ波をＡＥセンサにより検出し、このＡＥ波の振幅にも
とづいて予圧量を求めることを特徴とする軸受の予圧量
検出方法。A generated from the sliding contact surface when the bearing is rotating
A method for detecting a preload amount of a bearing, characterized in that an E wave is detected by an AE sensor, and a preload amount is determined based on the amplitude of the AE wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62268971A JPH01112019A (en) | 1987-10-23 | 1987-10-23 | Bearing pre-load detecting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62268971A JPH01112019A (en) | 1987-10-23 | 1987-10-23 | Bearing pre-load detecting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01112019A true JPH01112019A (en) | 1989-04-28 |
Family
ID=17465850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62268971A Pending JPH01112019A (en) | 1987-10-23 | 1987-10-23 | Bearing pre-load detecting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01112019A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4221035A1 (en) * | 1991-06-28 | 1993-01-07 | Nsk Ltd | METHOD AND DEVICE FOR MEASURING THE PRELOAD TENSION OF A ROLLER BEARING |
| GB2286246A (en) * | 1994-02-04 | 1995-08-09 | Nsk Ltd | Measuring preload gap |
| JP2001324416A (en) * | 2000-05-15 | 2001-11-22 | Non-Destructive Inspection Co Ltd | Method and device for detecting sliding between shaft and bearing |
| US7628540B2 (en) * | 2004-02-18 | 2009-12-08 | Ntn Corporation | Bearing device for wheel |
| JP2022093235A (en) * | 2020-12-11 | 2022-06-23 | 上銀科技股▲分▼有限公司 | Cycloid speed reducer having pre-load adjustment device |
-
1987
- 1987-10-23 JP JP62268971A patent/JPH01112019A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4221035A1 (en) * | 1991-06-28 | 1993-01-07 | Nsk Ltd | METHOD AND DEVICE FOR MEASURING THE PRELOAD TENSION OF A ROLLER BEARING |
| DE4221035C2 (en) * | 1991-06-28 | 1995-04-20 | Nsk Ltd | Method and device for measuring the preload of a roller bearing assembly |
| GB2286246A (en) * | 1994-02-04 | 1995-08-09 | Nsk Ltd | Measuring preload gap |
| US5597965A (en) * | 1994-02-04 | 1997-01-28 | Nsk Ltd. | Method and apparatus for measuring the preload gap of a double row rolling bearing |
| GB2286246B (en) * | 1994-02-04 | 1997-10-15 | Nsk Ltd | Method and apparatus for measuring the preload resilient deformation of a double row rolling bearing |
| JP2001324416A (en) * | 2000-05-15 | 2001-11-22 | Non-Destructive Inspection Co Ltd | Method and device for detecting sliding between shaft and bearing |
| US7628540B2 (en) * | 2004-02-18 | 2009-12-08 | Ntn Corporation | Bearing device for wheel |
| JP2022093235A (en) * | 2020-12-11 | 2022-06-23 | 上銀科技股▲分▼有限公司 | Cycloid speed reducer having pre-load adjustment device |
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