JP5035534B2 - Gap measurement method for rolling bearings - Google Patents
Gap measurement method for rolling bearings Download PDFInfo
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- JP5035534B2 JP5035534B2 JP2007250491A JP2007250491A JP5035534B2 JP 5035534 B2 JP5035534 B2 JP 5035534B2 JP 2007250491 A JP2007250491 A JP 2007250491A JP 2007250491 A JP2007250491 A JP 2007250491A JP 5035534 B2 JP5035534 B2 JP 5035534B2
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Description
この発明は、転がり軸受のすきま測定方法に関する。 The present invention relates to a clearance measuring method for a rolling bearing.
内輪、外輪、両輪間に配置された複数の転動体を備えている転がり軸受では、軸受すきまが所定の範囲内にあることが必要であり、そのために、ラジアルすきまなどのすきまを測定することが必要となっている。従来のラジアルすきまの測定方法は、所定位置において内輪および外輪のいずれか一方を軸方向に対して直角方向に移動させて第１の移動量を測定する工程と、内輪および外輪のいずれか一方を逆方向に移動させて第２の移動量を測定する工程と、第１および第２の移動量から目盛りの読みの差の絶対値として転がり軸受のラジアルすきまを求める工程とを含んでいるものとされている。 Rolling bearings with a plurality of rolling elements arranged between the inner ring, outer ring, and both wheels require that the bearing clearance be within a specified range.For this reason, it is possible to measure the clearance such as radial clearance. It is necessary. A conventional method for measuring radial clearance includes a step of measuring either the inner ring or the outer ring at a predetermined position by moving either the inner ring or the outer ring in a direction perpendicular to the axial direction, and measuring either the inner ring or the outer ring. A step of measuring the second movement amount by moving in the opposite direction, and a step of obtaining a radial clearance of the rolling bearing as an absolute value of a difference in scale reading from the first and second movement amounts; Has been.
また、特許文献１には、内輪を回転させてラジアル振れやラジアルすきまを測定することが開示されている。
ラジアルすきまは、１回転するのに伴ってその値が変化するにもかかわらず、上記従来のラジアルすきまの測定方法は、外輪に対して内輪を相対的に回転させることなく、一点で内輪および外輪のいずれか一方を正逆両方向に変位させてラジアルすきまを求めるものであり、その後に、転がり軸受をハウジングや回転軸に取り付ける場合に、有用な値として利用しにくいものとなっている。ラジアルすきまの測定精度を向上するためには、軸受を回転させ、測定を一点でなく多点で行い、ばらつきを知ることが好ましいが、多点で測定を行うと１つの軸受の測定にかかる時間（サイクルタイム）が長くなるという問題が発生する。 Although the value of the radial clearance changes with one rotation, the above-described conventional radial clearance measurement method does not rotate the inner ring relative to the outer ring, and the inner ring and the outer ring at a single point. One of these is displaced in both forward and reverse directions to determine the radial clearance. After that, when a rolling bearing is attached to the housing or the rotating shaft, it is difficult to use as a useful value. In order to improve the measurement accuracy of the radial clearance, it is preferable to rotate the bearing and perform the measurement at multiple points instead of one point to know the variation. However, when measuring at multiple points, the time taken to measure one bearing The problem that (cycle time) becomes long occurs.
特許文献１には、内輪を回転させてラジアル振れを測定することが開示されているが、ラジアル振れは、３６０°回転させたときのラジアル方向変位の振れを見るもので、ラジアル振れからラジアルすきまを求めることは困難である。
この発明の目的は、サイクルタイムの増加を抑えてラジアルすきまの測定精度を向上させることができる転がり軸受のすきま測定方法を提供することにある。 An object of the present invention is to provide a clearance measurement method for a rolling bearing capable of improving the measurement accuracy of a radial clearance while suppressing an increase in cycle time.
この発明による転がり軸受のすきま測定方法は、内輪、外輪、両輪間に配置された複数の転動体を備えている転がり軸受のラジアルすきまを測定する方法であって、内輪および外輪のいずれか一方を回転不可能に保持する工程と、荷重をかけながら予備回転を行う工程と、外輪に対して内輪を相対的に回転させて停止させる工程と、内輪および外輪のいずれか一方を軸方向に対して直角方向に移動させて移動量を測定する工程と、外輪移動量から転がり軸受のラジアルすきまを求める工程とを含んでおり、内輪を１ピッチずつ回転可能とし、一方向に荷重を負荷して外輪移動量を測定した後は、内輪を１ピッチだけ回転させるとともに、逆方向に荷重を負荷して外輪移動量を測定し、次いで、内輪を１ピッチだけ回転させるとともに、正方向に荷重を負荷して外輪移動量を測定し、これを繰り返すことで第１から第ｎまでの位置における外輪移動量を得ることを特徴とするものである。 A clearance measuring method for a rolling bearing according to the present invention is a method for measuring a radial clearance of a rolling bearing having a plurality of rolling elements disposed between an inner ring, an outer ring, and both wheels, wherein either one of an inner ring or an outer ring is measured. a step of non-rotatably held, and performing preliminary rotation while applying a load, a step of locked stop by relatively rotating the inner ring relative to the outer ring, one of the inner and outer rings relative to the axial direction measuring a amount of movement is moved in the direction perpendicular Te, it includes a step of obtaining a radial clearance of the rolling bearing from the outer wheel movement amount, and rotatable inner ring by one pitch, the load to the load in one direction After measuring the amount of movement of the outer ring, rotate the inner ring by 1 pitch, apply a load in the opposite direction and measure the amount of movement of the outer ring, then rotate the inner ring by 1 pitch and move in the forward direction. And a load was measured outer movement amount, and is characterized in that to obtain the outer movement amount at the position from the first by repeating this until the n.
この発明による転がり軸受のすきま測定方法を実施するすきま測定装置は、例えば、駆動手段によって回転させられる駆動軸と、駆動軸に内輪を結合する内輪クランプ手段と、駆動軸の軸線回りの位相角度を検出する位相角度検知手段と、外輪を保持する外輪クランプ手段と、外輪クランプ手段を支持して軸線方向と直交する方向に移動可能な可動テーブルと、可動テーブルに軸線方向と直交する方向の荷重を負荷する荷重負荷手段と、可動テーブルに荷重が負荷された際の外輪の移動量を検知する例えば差動トランスのような外輪移動量検出手段と、外輪の移動量から玉軸受のラジアルすきまを求める演算手段とを備えているものとされる。 A clearance measuring apparatus for carrying out a rolling bearing clearance measuring method according to the present invention includes, for example, a drive shaft rotated by a drive means, an inner ring clamp means for coupling an inner ring to the drive shaft, and a phase angle around the axis of the drive shaft. Phase angle detection means for detecting, outer ring clamp means for holding the outer ring, a movable table that supports the outer ring clamp means and is movable in a direction orthogonal to the axial direction, and a load in a direction orthogonal to the axial direction is applied to the movable table. The load bearing means for loading, the outer ring movement amount detecting means such as a differential transformer for detecting the movement amount of the outer ring when a load is applied to the movable table, and the radial clearance of the ball bearing are obtained from the movement amount of the outer ring. And an arithmetic means.
転がり軸受は、例えば玉軸受とされるが、ころ軸受など他の転がり軸受であってもよい。 The rolling bearing is, for example, a ball bearing, but may be another rolling bearing such as a roller bearing.
ラジアルすきまの検出前に、一方向から荷重をかけながら予備回転を行うことが好ましく、これにより、転がり軸受の転動体が軌道底に移動するので、適正なラジアルすきまを得ることができる。この場合、軸受の軸方向を水平にすることで、転動体が軌道底に移動しやすくなり、より軽荷重で精度のよい測定を行うことができる。 Prior to the detection of the radial clearance, it is preferable to perform preliminary rotation while applying a load from one direction. As a result, the rolling element of the rolling bearing moves to the bottom of the raceway, so that an appropriate radial clearance can be obtained. In this case, by making the axial direction of the bearing horizontal, the rolling element can easily move to the bottom of the raceway, and a more accurate measurement can be performed with a lighter load.
荷重を負荷するに際しては、外輪を軸方向に対して直角の両方向に移動可能とすることが好ましい。内輪は、外輪に荷重が負荷された状態で回転させられ、予備回転後には、内輪を１ピッチ＝３６０°／（２ｍ＋１），ｍ：自然数ずつ回転可能とし、一方向に荷重を負荷して外輪移動量を測定した後は、逆方向に荷重を負荷して内輪を１ピッチだけ回転させて、外輪移動量を測定し、次いで、正方向に荷重を負荷して内輪を１ピッチだけ回転させて、外輪移動量を測定し、これを繰り返すことで第１から第ｎまでの位置における外輪移動量を得ることが好ましい。そして、同じ位置で一方向と逆方向に荷重を負荷したときのそれぞれの外輪移動量から１つのラジアルすきま（移動量の絶対値の和）を求め、他の位置でも同様にしてラジアルすきまを求め、少なくとも計（２ｍ＋１）個のラジアルすきまを平均することでラジアルすきまが求められる。こうして、１回転３６０°を奇数回に分割して等角度ずつ回転させるとともに、負荷の方向を交互に変更していくことにより、負荷回数に対するサイクルタイムの影響を小さくすることができる。 When applying the load, the outer ring is preferably movable in both directions perpendicular to the axial direction. The inner ring is rotated while a load is applied to the outer ring. After the preliminary rotation, the inner ring can be rotated by 1 pitch = 360 ° / (2m + 1), m: natural number, and the outer ring is loaded with a load in one direction. After measuring the travel distance, load the load in the opposite direction and rotate the inner ring by 1 pitch to measure the travel distance of the outer ring, then load the forward direction and rotate the inner ring by 1 pitch. It is preferable to measure the outer ring moving amount and repeat this to obtain the outer ring moving amount at the first to nth positions. Then, calculate one radial clearance (sum of absolute values of the amount of movement) from each outer ring movement amount when a load is applied in one direction and the opposite direction at the same position, and obtain the radial clearance in the same way at other positions. The radial clearance is obtained by averaging at least a total of (2m + 1) radial clearances. In this way, by rotating 360 degrees per rotation into an odd number and rotating them by equal angles, and by alternately changing the direction of the load, the influence of the cycle time on the number of loads can be reduced.
３等配の箇所でのラジアルすきまの測定は、具体的には、例えば、外輪クランプ手段の移動量を検出する差動トランスを使用して、次の順序で行われる。 Specifically, the measurement of the radial clearance at the three equally spaced locations is performed in the following order using, for example, a differential transformer that detects the amount of movement of the outer ring clamping means.
（ａ）外輪をクランプした後、＋方向に負荷をかけ、内輪を予備回転（回転方向はどちらでも可）させる。 (A) After clamping the outer ring, a load is applied in the + direction, and the inner ring is preliminarily rotated (the rotation direction can be either).
（ｂ）予備回転後のある位置の差動トランス値を記憶。 (B) Store the differential transformer value at a certain position after the preliminary rotation.
（ｃ）次いで、−方向負荷に変更し内輪が１２０°回転時の差動トランス値を記憶。 (C) Next, change to -direction load and store the differential transformer value when the inner ring rotates 120 °.
（ｄ）次いで、＋方向負荷に変更し内輪が１２０°回転時の差動トランス値を記憶。 (D) Next, change to a positive direction load and store the differential transformer value when the inner ring rotates 120 °.
（ｅ）次いで、−方向負荷に変更し内輪が１２０°回転時の差動トランス値を記憶。 (E) Next, change to -direction load and store the differential transformer value when the inner ring rotates 120 °.
（ｆ）次いで、＋方向負荷に変更し内輪が１２０°回転時の差動トランス値を記憶。 (F) Next, change to a + direction load and store the differential transformer value when the inner ring rotates 120 °.
（ｇ）次いで、−方向負荷に変更し内輪が１２０°回転時の差動トランス値を記憶。 (G) Next, change to -direction load and store the differential transformer value when the inner ring rotates 120 °.
（ｈ）次いで、＋方向負荷に変更し内輪が１２０°回転時の差動トランス値を記憶。 (H) Next, change to a positive direction load and store the differential transformer value when the inner ring rotates 120 °.
（ｉ）次いで、−方向負荷に変更し内輪が１２０°回転時の差動トランス値を記憶。 (I) Next, the differential transformer value when the inner ring rotates 120 ° is stored by changing to a negative direction load.
（ｊ）次いで、＋方向負荷に変更し内輪が１２０°回転時の差動トランス値を記憶。 (J) Next, change to a + direction load and store the differential transformer value when the inner ring rotates 120 °.
（ｋ）Ａ〜Ｃ各位置の＋方向変位と−方向変位の差（移動量の和）が各位置でのラジアルすきまとなるので、転動体の位置関係のばらつきを考慮して、｜（ｈ）−（ｅ）｜，｜（ｅ）−（ｂ）｜，｜（ｉ）−（ｆ）｜，｜（ｆ）−（ｃ）｜，｜（ｊ）−（ｇ）｜および｜（ｇ）−（ｄ）｜の６データの平均値をラジアルすきまとする。また、これらの６データの最大値を最大ラジアルすきま、最小値を最小ラジアルすきまとして記録する。 (K) Since the difference between the + direction displacement and the − direction displacement (sum of the movement amount) at each position of A to C is a radial clearance at each position, | (h )-(E) |, | (e)-(b) |, | (i)-(f) |, | (f)-(c) |, | (j)-(g) | and | (g )-(D) | The average value of the 6 data is the radial clearance. Also, the maximum value of these 6 data is recorded as the maximum radial clearance, and the minimum value is recorded as the minimum radial clearance.
この発明の転がり軸受のすきま測定方法によると、第１の位置だけで正逆両方向に変位させてラジアルすきまを求める従来のものに比べて、精度を向上することができ、また、外輪に対して内輪を相対的に回転させながら、内輪および外輪のいずれか一方の軸方向移動を行うので、サイクルタイムが長くなることを防止することができる。 According to the rolling bearing clearance measuring method of the present invention, the accuracy can be improved compared to the conventional one in which the radial clearance is obtained by displacing in both the forward and reverse directions only at the first position. Since the axial movement of either the inner ring or the outer ring is performed while relatively rotating the inner ring, the cycle time can be prevented from becoming longer.
そして、１回転３６０°を奇数回に分割して等角度ずつ回転させるとともに、負荷の方向を交互に変更していくことにより、測定点の数を増やすことでラジアルすきまのばらつき、最大値および最小値が分かるので、有用なラジアルすきまを精度よく得ることができ、しかも、これを得るためのサイクルタイムの増加を小さいものとすることができる。 The rotation 360 ° is divided into an odd number of rotations and rotated at equal angles, and the load direction is changed alternately to increase the number of measurement points, thereby increasing the radial clearance variation, the maximum value and the minimum value. Since the value is known, a useful radial clearance can be obtained with high accuracy, and the increase in cycle time for obtaining this can be reduced.
この発明の実施の形態を、以下図面を参照して説明する。以下の説明において、図１の上下を上下といい、図１および図２の左を前、同右を後というものとする。 Embodiments of the present invention will be described below with reference to the drawings. In the following description, the top and bottom in FIG. 1 are referred to as the top and bottom, the left in FIGS. 1 and 2 is the front, and the right is the back.
図１および図２は、この発明による転がり軸受のすきま測定方法を実施するためのすきま測定装置を示している。 1 and 2 show a clearance measuring device for carrying out the clearance measuring method for a rolling bearing according to the present invention.
この発明によるすきま測定方法が対象としている転がり軸受(1)は、内輪(2)、外輪(3)、両輪(2)(3)間に配置された複数の転動体（例えば玉）(4)、および複数の転動体(5)を保持する保持器(5)を備えている。 The rolling bearing (1) to which the clearance measuring method according to the present invention is applied is composed of an inner ring (2), an outer ring (3), and a plurality of rolling elements (for example, balls) (4) disposed between both wheels (2) (3). And a holder (5) for holding a plurality of rolling elements (5).
転がり軸受のすきま測定装置(11)は、ケーシング(12)内に回転自在に支持されて駆動手段(13)によって回転させられる上下方向にのびる駆動軸(14)と、駆動軸(14)に内輪(2)を結合する内輪クランプ手段(15)と、駆動軸(14)の軸線回りの位相角度を検出する位相角度検知手段(16)と、前後１対のアーム(18)を有し外輪(3)を保持する外輪クランプ手段(17)と、外輪クランプ手段(17)を支持して前後方向（軸線方向と直交する方向）に移動可能な可動テーブル(19)と、可動テーブル(19)を案内する前後方向にのびる１対のガイドレール(20)と、可動テーブル(19)に前後方向の荷重を負荷する荷重負荷手段(21)と、可動テーブル(19)に荷重が負荷された際の外輪(3)の移動量を検知する外輪移動量検出手段(22)と、外輪(3)の移動量から玉軸受(5)のラジアルすきまを求める演算手段(23)とを備えている。 A rolling bearing clearance measuring device (11) includes a drive shaft (14) that is rotatably supported in a casing (12) and rotated by a drive means (13), and an inner ring on the drive shaft (14). (2) An inner ring clamping means (15) for coupling, a phase angle detection means (16) for detecting a phase angle around the axis of the drive shaft (14), and a pair of front and rear arms (18) and an outer ring ( 3) An outer ring clamp means (17) for holding, a movable table (19) that supports the outer ring clamp means (17) and is movable in the front-rear direction (direction orthogonal to the axial direction), and a movable table (19) When a load is applied to the movable table (19), a pair of guide rails (20) extending in the front-rear direction, a load loading means (21) for applying a load in the front-rear direction to the movable table (19), Outer ring movement amount detection means (22) for detecting the movement amount of the outer ring (3) and calculation means for determining the radial clearance of the ball bearing (5) from the movement amount of the outer ring (3) ( 23).
駆動手段(13)は、駆動軸(14)に固定された従動プーリ(31)と、従動プーリ(31)とベルト(32)によって結合された駆動プーリ（図示略）と、駆動プーリを駆動するモータ(33)とを有している。 The drive means (13) drives a driven pulley (31) fixed to the drive shaft (14), a drive pulley (not shown) coupled by the driven pulley (31) and the belt (32), and the drive pulley. And a motor (33).
内輪クランプ手段(15)は、中空状とされた駆動軸(14)の内部に挿通されて先端に設けられた内輪嵌入用軸部(35)を駆動軸(14)から突出させた支持軸(34)と、内輪嵌入用軸部(35)に嵌め合わせられた内輪(2)に上方（軸方向先端側）から当てがわれる内輪クランプ治具(36)と、内輪クランプ治具(36)を内輪(2)に一体化するために内輪嵌入用軸部(35)にねじ合わされるおねじ部材(37)とを有している。 The inner ring clamp means (15) is inserted into the hollow drive shaft (14), and a support shaft (35) protruding from the drive shaft (14) is inserted into the inner ring insertion shaft portion (35) provided at the tip. 34), an inner ring clamp jig (36) applied to the inner ring (2) fitted to the inner ring fitting shaft part (35) from above (the axial end side), and an inner ring clamp jig (36) In order to be integrated with the inner ring (2), it has a male screw member (37) screwed to the inner ring fitting shaft (35).
位相角度検知手段(16)は、ロータリーエンコーダ(38)と、ロータリーエンコーダ(38)の入力軸(38a)と駆動軸(14)とを結合するギヤ(39)(40)とを有している。 The phase angle detection means (16) includes a rotary encoder (38) and gears (39) and (40) that couple the input shaft (38a) and the drive shaft (14) of the rotary encoder (38). .
外輪クランプ手段(17)は、前後アーム(18)がそれぞれ取り付けられた前後１対のスライダ(41)と、スライダ(41)を案内するガイドレール(42)と、各スライダ(41)を互いに接近または離隔する方向に移動させるスライダ駆動手段(43)とを有している。外輪(3)は、前後アーム(18)によって径方向対称位置から挟持され、この状態で、可動テーブル(19)が前後方向に移動させられることで、外輪(3)に荷重が負荷される。外輪(3)をクランプする方向と可動テーブル(19)の移動方向とは、いずれも前後方向（互いに平行）とされている。 The outer ring clamping means (17) has a pair of front and rear sliders (41) to which the front and rear arms (18) are respectively attached, a guide rail (42) for guiding the slider (41), and the sliders (41) approaching each other. Alternatively, the slider driving means (43) for moving in the separating direction is provided. The outer ring (3) is clamped from the radially symmetrical position by the front and rear arms (18), and in this state, the movable table (19) is moved in the front and rear direction, whereby a load is applied to the outer ring (3). The direction in which the outer ring (3) is clamped and the moving direction of the movable table (19) are both in the front-rear direction (parallel to each other).
荷重負荷手段(21)は、前後方向にのびるシリンダーロッド(45)を前進・後退させる流体圧シリンダー(44)と、可動テーブル(19)に固定されてシリンダーロッド(45)を挿通させるばね受け部材(46)と、シリンダーロッド(45)の基端部とばね受け部材(46)との間に配置された前進方向負荷ばね(47)と、シリンダーロッド(45)の先端部とばね受け部材(46)との間に配置された後退方向負荷ばね(48)とを有している。したがって、シリンダーロッド(45)を前進（左方に移動）させると、可動テーブル(19)は、前進方向負荷ばね(47)によって前進方向（以下では「＋方向」と称す）に付勢され、また、シリンダーロッド(45)を後退（右方に移動）させると、可動テーブル(19)は、後退方向負荷ばね(48)によって後退方向（以下では「−方向」と称す）に付勢される。測定荷重は、フリー方向に回転させたときに一方向クラッチ(4)が離脱して、軸受(5)(6)だけで荷重を負荷できるように設定される。 The load loading means (21) includes a fluid pressure cylinder (44) that moves the cylinder rod (45) extending in the front-rear direction forward and backward, and a spring receiving member that is fixed to the movable table (19) and allows the cylinder rod (45) to pass through. (46), a forward load spring (47) disposed between the base end of the cylinder rod (45) and the spring receiving member (46), and the tip of the cylinder rod (45) and the spring receiving member ( 46) and a backward load spring (48) disposed between them. Therefore, when the cylinder rod (45) is moved forward (moved to the left), the movable table (19) is urged in the forward direction (hereinafter referred to as “+ direction”) by the forward load spring (47), When the cylinder rod (45) is moved backward (moved to the right), the movable table (19) is urged in the backward direction (hereinafter referred to as “− direction”) by the backward load spring (48). . The measured load is set so that the one-way clutch (4) is disengaged when rotated in the free direction and the load can be applied only by the bearings (5) and (6).
外輪移動量検出手段(22)は、外輪(3)の前後方向移動量＝前後アーム(18)の前後方向移動量であることに基づいて、外輪(3)の前後方向移動量を求めるもので、装置に固定されている支持ブラケット(49)に支持されて前後アーム(18)の前後方向移動量を検出する差動トランス(50)を有している。 The outer ring movement amount detecting means (22) calculates the front / rear direction movement amount of the outer ring (3) based on the movement amount of the outer ring (3) in the front / rear direction = the movement amount of the front / rear arm (18). And a differential transformer (50) that is supported by a support bracket (49) fixed to the device and detects the amount of movement of the front and rear arm (18) in the front-rear direction.
図３を参照して、上記のすきま測定装置(11)を使用して転がり軸受(1)のラジアルすきまを測定するステップを説明する。ここで、駆動軸(14)は、回転角度にして１２０°ずつ回転させられ、荷重負荷手段(21)は、この間に、＋方向または−方向のいずれかに移動させられる。 With reference to FIG. 3, the step which measures the radial clearance of a rolling bearing (1) using said clearance measuring apparatus (11) is demonstrated. Here, the drive shaft (14) is rotated by 120 ° as a rotation angle, and the load applying means (21) is moved in either the + direction or the − direction during this time.
まず、転がり軸受(1)の転動体(4)を軌道底に移動させるために、図３（ａ）に示すように、外輪(3)をクランプした状態で、＋方向に負荷をかけ、内輪(2)を予備回転（方向はどちらでも可）させる。 First, in order to move the rolling element (4) of the rolling bearing (1) to the track bottom, as shown in FIG. 3 (a), with the outer ring (3) clamped, a load is applied in the + direction to (2) is pre-rotated (either direction is acceptable).
次いで、図３（ｂ）に示すように、予備回転後のある位置の差動トランス値＜＋Ａ＞を記憶させる。 Next, as shown in FIG. 3B, the differential transformer value <+ A> at a certain position after the preliminary rotation is stored.
次いで、図３（ｃ）に示すように、−方向負荷に変更し内輪が１２０°回転時の差動トランス値＜−Ｂ＞を記憶する。 Next, as shown in FIG. 3 (c), the differential transformer value <-B> when the inner ring rotates 120 ° is changed to the -direction load.
次いで、図３（ｄ）に示すように、＋方向負荷に変更し内輪が１２０°回転時の差動トランス値＜＋Ｃ＞を記憶する。 Next, as shown in FIG. 3D, the load is changed to a + direction load, and the differential transformer value <+ C> when the inner ring rotates 120 ° is stored.
次いで、図３（ｅ）に示すように、−方向負荷に変更し内輪が１２０°回転時の差動トランス値＜−Ａ＞を記憶する。 Next, as shown in FIG. 3 (e), the differential transformer value <-A> when the inner ring rotates 120 ° is changed to the -direction load.
次いで、図３（ｆ）に示すように、＋方向負荷に変更し内輪が１２０°回転時の差動トランス値＜＋Ｂ＞を記憶する。 Next, as shown in FIG. 3 (f), the differential transformer value <+ B> when the inner ring rotates 120 ° is changed to the + direction load.
次いで、図３（ｇ）に示すように、−方向負荷に変更し内輪が１２０°回転時の差動トランス値＜−Ｃ＞を記憶する。 Next, as shown in FIG. 3 (g), the differential transformer value <-C> when the inner ring is rotated by 120 [deg.] Is stored by changing to a -direction load.
次いで、図３（ｈ）に示すように、＋方向負荷に変更し内輪が１２０°回転時の差動トランス値＜＋Ａ＞を記憶する。 Next, as shown in FIG. 3 (h), the differential transformer value <+ A> when the inner ring rotates 120 ° is changed to the + direction load.
次いで、図３（ｉ）に示すように、−方向負荷に変更し内輪が１２０°回転時の差動トランス値＜−Ｂ＞を記憶する。 Next, as shown in FIG. 3 (i), the differential transformer value <-B> when the inner ring is rotated by 120 [deg.] While being changed to the -direction load is stored.
次いで、図３（ｊ）に示すように、＋方向負荷に変更し内輪が１２０°回転時の差動トランス値＜＋Ｃ＞を記憶する。 Next, as shown in FIG. 3 (j), the differential transformer value <+ C> when the inner ring rotates by 120 ° is stored by changing to a + direction load.
上記（ｂ）〜（ｊ）の操作において、Ａ〜Ｃ各位置の＋方向変位と−方向変位の差（移動量の和）が各位置でのラジアルすきまとなり、演算手段(23)においては、｜（ｈ）−（ｅ）｜＝＜＋Ａ＞−＜−Ａ＞，｜（ｅ）−（ｂ）｜＝＜＋Ａ＞−＜−Ａ＞，｜（ｉ）−（ｆ）｜＝＜＋Ｂ＞−＜−Ｂ＞，｜（ｆ）−（ｃ）｜＝＜＋Ｂ＞−＜−Ｂ＞，｜（ｊ）−（ｇ）｜＝＜＋Ｃ＞−＜−Ｃ＞および｜（ｇ）−（ｄ）｜＝＜＋Ｃ＞−＜−Ｃ＞の６データが得られる。したがって、例えばこれらの平均値を玉軸受(5)のラジアルすきまとすればよい。また、これらの６データの最大値を最大ラジアルすきま、最小値を最小ラジアルすきまとして、これが最大または最小ラジアルすきまの基準値を超えたものについては、ラジアルすきま異常として排除される。得られた最大ラジアルすきま、最小ラジアルすきまおよび平均ラジアルすきまは、この転がり軸受(1)をハウジングや回転軸に取り付ける際などに利用される。 In the operations (b) to (j) above, the difference between the + direction displacement and the − direction displacement (sum of the movement amount) at each of the positions A to C becomes the radial clearance at each position. In the calculation means (23), | (H) − (e) | = <+ A> − <− A>, | (e) − (b) | = <+ A> − <− A>, | (i) − (f) | = <+ B > − <− B>, | (f) − (c) | = <+ B> − <− B>, | (j) − (g) | = <+ C> − <− C> and | (g) − (D) Six data of | = <+ C> − <− C> are obtained. Therefore, for example, the average value of these may be used as the radial clearance of the ball bearing (5). The maximum value of these 6 data is the maximum radial clearance, the minimum value is the minimum radial clearance, and those exceeding the maximum or minimum radial clearance reference value are excluded as a radial clearance abnormality. The obtained maximum radial clearance, minimum radial clearance and average radial clearance are used when the rolling bearing (1) is mounted on a housing or a rotating shaft.
こうして、１回転３６０°を奇数回（３回）に分割して等角度（１２０°）ずつ回転させるとともに、負荷の方向を交互に変更していくことにより、負荷回数に対するサイクルタイムの影響を小さくすることができる。 In this way, one rotation of 360 ° is divided into an odd number of times (three times) and rotated at equal angles (120 °), and the direction of the load is changed alternately, thereby reducing the influence of the cycle time on the number of loads. can do.
上記一連の測定の後、外輪を例えば周方向に所定角度（９０°ずつ、１２０°ずつ、１８０°ずつなど）回転させ、同様の測定を行うことにより、外輪についても、一点でなく多点における測定を行うことで、より精度の高いラジアルすきまを得ることができる。 After the above series of measurements, the outer ring is rotated at a predetermined angle (90 °, 120 °, 180 °, etc.) in the circumferential direction, and the same measurement is performed. By performing the measurement, it is possible to obtain a more accurate radial clearance.
なお、上記において、内輪を回転させて、外輪を軸方向に直角の方向に移動させているが、外輪を回転させて、内輪を軸方向に直角の方向に移動させてもよい。 In the above, the inner ring is rotated and the outer ring is moved in a direction perpendicular to the axial direction. However, the outer ring may be rotated and the inner ring may be moved in a direction perpendicular to the axial direction.
(1) 転がり軸受
(2) 内輪
(3) 外輪
(4) 玉（転動体）
(11) すきま測定装置
(1) Rolling bearing
(2) Inner ring
(3) Outer ring
(4) Ball (rolling element)
(11) Clearance measuring device
Claims (2)
内輪および外輪のいずれか一方を回転不可能に保持する工程と、荷重をかけながら予備回転を行う工程と、外輪に対して内輪を相対的に回転させて停止させる工程と、内輪および外輪のいずれか一方を軸方向に対して直角方向に移動させて移動量を測定する工程と、外輪移動量から転がり軸受のラジアルすきまを求める工程とを含んでおり、
内輪を１ピッチずつ回転可能とし、一方向に荷重を負荷して外輪移動量を測定した後は、内輪を１ピッチだけ回転させるとともに、逆方向に荷重を負荷して外輪移動量を測定し、次いで、内輪を１ピッチだけ回転させるとともに、正方向に荷重を負荷して外輪移動量を測定し、これを繰り返すことで第１から第ｎまでの位置における外輪移動量を得ることを特徴とする転がり軸受のすきま測定方法。 A method for measuring a radial clearance of a rolling bearing having a plurality of rolling elements arranged between an inner ring, an outer ring, and both wheels,
A step of holding one of the inner ring and the outer ring in a non-rotatable state, a step of performing a preliminary rotation while applying a load, a step of rotating the inner ring relative to the outer ring to stop it, and any of the inner ring and the outer ring Including a step of measuring the amount of movement by moving one of them in a direction perpendicular to the axial direction, and a step of obtaining a radial clearance of the rolling bearing from the amount of movement of the outer ring,
After the inner ring can be rotated one pitch at a time and the outer ring travel is measured with a load applied in one direction, the inner ring is rotated by one pitch and the outer ring travel is measured with a load applied in the opposite direction. Next, the inner ring is rotated by one pitch, and a load is applied in the positive direction to measure the outer ring movement amount. By repeating this, the outer ring movement amount at the first to nth positions is obtained. Gap measurement method for rolling bearings.
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| CN109443285B (en) * | 2018-12-27 | 2023-08-22 | 宁波中亿自动化装备有限公司 | Bearing play measuring method and equipment thereof |
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| JPS533659A (en) * | 1976-06-29 | 1978-01-13 | Omron Tateisi Electronics Co | Method of producing printed substrate |
| JPS5539010A (en) * | 1978-09-13 | 1980-03-18 | Nachi Fujikoshi Corp | Measurement of rotational accuracy of bearing |
| JPS5539009A (en) * | 1978-09-13 | 1980-03-18 | Nachi Fujikoshi Corp | Meter for rotational accuracy and gap of roller bearing |
| JPS5621031A (en) * | 1979-07-31 | 1981-02-27 | Nippon Seiko Kk | Radial clearance gauge for cylindrical roller bearing |
| JPS56143901A (en) * | 1980-04-10 | 1981-11-10 | Nippon Seiko Kk | Method for measuring radial run-out of double-row self-aligning roller bearing and its loading device |
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