JP2014098460A - Deep groove ball bearing - Google Patents

Deep groove ball bearing Download PDF

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JP2014098460A
JP2014098460A JP2012251388A JP2012251388A JP2014098460A JP 2014098460 A JP2014098460 A JP 2014098460A JP 2012251388 A JP2012251388 A JP 2012251388A JP 2012251388 A JP2012251388 A JP 2012251388A JP 2014098460 A JP2014098460 A JP 2014098460A
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shoulder
ball
diameter
raceway
height
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Yoshiaki Ryono
嘉昭 漁野
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To improve incorporating performance of a ball for a deep groove ball bearing having a high thrust load capacity.SOLUTION: A ball 31 is incorporated between an outer ring 11 and an inner ring 21 having different left and right shoulder heights, and the ball 31 is retained by a retainer 40. A slope shaped ball guide surface 25 is formed to improve incorporating performance of the ball 31. The ball guide surface 25 is formed at least on an outer peripheral edge of a back surface 24 adjacent to a large diameter shoulder 23b in the inner ring 21 or an inner peripheral edge of a front surface 14 adjacent to a large diameter shoulder 13b in the outer ring 11.

Description

この発明は、外方軌道輪と内方軌道輪間にボールを組み込んだ深みぞ玉軸受に関する。   The present invention relates to a deep groove ball bearing in which a ball is incorporated between an outer race and an inner race.

インプットシャフトとアウトプットシャフトを同軸上に配置し、その両軸に平行にカウンタシャフトを設け、その平行する２軸の相互間に変速比の異なる複数の歯車式減速部を設けて、インプットシャフトの回転を複数段に変速してアウトプットシャフトから出力するようにしたトランスミッションにおいては、一般的に、歯車式減速部にヘリカルギヤを採用しているため、インプットシャフトからアウトプットシャフトへの回転トルクの伝達時、インプットシャフト、アウトプットシャフトおよびカウンタシャフトのそれぞれにスラスト力が負荷されることになる。   The input shaft and the output shaft are arranged on the same axis, the countershaft is provided in parallel to both axes, and a plurality of gear-type reduction gears with different gear ratios are provided between the two parallel axes to rotate the input shaft. In a transmission that shifts to multiple stages and outputs from the output shaft, a helical gear is generally used for the gear-type reduction gear, so input torque is transmitted from the input shaft to the output shaft. A thrust force is applied to each of the shaft, the output shaft, and the counter shaft.

このため、インプットシャフト、アウトプットシャフトおよびカウンタシャフトを支持する軸受には、ラジアル荷重とスラスト荷重の両方の荷重を支持することができる軸受を用いる必要がある。   For this reason, it is necessary to use a bearing that can support both a radial load and a thrust load as a bearing that supports the input shaft, the output shaft, and the counter shaft.

円すいころ軸受においては、負荷容量が大きく、スラスト荷重およびラジアル荷重の両方を受けることができるため、トランスミッション用の軸受に好適である。しかし、円すいころ軸受においては、損失トルクが大きく、燃料の消費量が多くなるという問題が生じる。その低燃費化を図るため、トルク損失の少ない深みぞ玉軸受が使用されるケースが多くなってきている。   Tapered roller bearings are suitable for transmission bearings because they have a large load capacity and can receive both thrust loads and radial loads. However, in the tapered roller bearing, there is a problem that the loss torque is large and the amount of fuel consumption increases. In order to reduce the fuel consumption, deep groove ball bearings with less torque loss are often used.

ところで、標準の深みぞ玉軸受においては、過大なスラスト荷重が負荷された際に、そのスラスト荷重を受ける負荷側の肩にボールが乗り上げて、肩のエッジが損傷する懸念がある。   By the way, in a standard deep groove ball bearing, when an excessive thrust load is applied, there is a concern that the ball rides on the load-side shoulder receiving the thrust load and the shoulder edge is damaged.

そのような不都合を解消するため、特許文献１に記載された深みぞ玉軸受においては、外輪の軌道溝および内輪の軌道溝のそれぞれ両側に形成された肩のうち、スラスト荷重を受ける側の肩を高くして、ボールの乗り上げを阻止し、軸受の耐久性の低下を抑制して、大きなスラスト荷重を受けることができるようにしている。   In order to eliminate such inconvenience, in the deep groove ball bearing described in Patent Document 1, of the shoulders formed on both sides of the outer ring raceway groove and the inner ring raceway groove, the shoulder on the side receiving the thrust load. Is increased to prevent the ball from climbing, to suppress a decrease in the durability of the bearing, and to receive a large thrust load.

特開２０１１−２１６６１号公報JP 2011-21661 A

ところで、上記特許文献１に記載された深みぞ玉軸受においては、外輪および内輪の肩を高くしたことにより、ボールの肩乗り上げを防止して、大きなスラスト荷重を受けることができるものの、外輪内径面と内輪外径面間に形成される軸受空間の開口部が狭くなって、ボールの組込みが困難となり、その組込み性を向上させる上において改善すべき点が残されている。   By the way, in the deep groove ball bearing described in Patent Document 1, the shoulders of the outer ring and the inner ring can be raised to prevent the balls from climbing over the shoulder and receive a large thrust load. Since the opening of the bearing space formed between the inner ring and the outer surface of the inner ring is narrowed, it becomes difficult to incorporate the ball.

この発明の課題は、スラスト負荷容量の大きな深みぞ玉軸受のボールの組込み性の向上を図ることである。   An object of the present invention is to improve the ball assemblability of a deep groove ball bearing having a large thrust load capacity.

上記の課題を解決するために、この発明においては、内径面に軌道溝を有する外方軌道輪と、外径面に軌道溝を有する内方軌道輪と、外方軌道輪の軌道溝と内方軌道輪の軌道溝間に組込まれたボールと、そのボールを保持する保持器とからなり、前記外方軌道輪における軌道溝の一側の肩と前記内方軌道輪における軌道溝の他側の肩の高さを、外方軌道輪の他側の肩と前記内方軌道輪の一側の肩の高さより高くし、その高さの高い肩の肩高さをＨ１、ボールの球径をｄとしたとき、ボールの球径ｄに対する肩高さＨ１の比率Ｈ１／ｄを０．２５〜０．５０未満の範囲とし、前記内方軌道輪を軸に嵌合し、その軸に設けられた肩で内方軌道輪の大径肩側の背面を位置決めして使用される深みぞ玉軸受において、前記内方軌道輪の肩高さの高い大径肩側の背面の外周縁部と外方軌道輪の肩高さの低い大径肩側の正面の内周縁部の少なくとも一方に傾斜状のボール案内面を形成した構成を採用したのである。 In order to solve the above problems, in the present invention, the outer race ring having a raceway groove on the inner diameter surface, the inner race ring having a raceway groove on the outer diameter surface, the raceway groove and the inner raceway of the outer raceway ring. A ball assembled between the raceway grooves of the side raceway ring and a cage for holding the ball, and a shoulder on one side of the raceway groove in the outer raceway ring and the other side of the raceway groove in the inner raceway ring The height of the shoulder of the ball is higher than the height of the shoulder on the other side of the outer race and the shoulder on one side of the inner race, and the shoulder height of the higher shoulder is set to H 1 . When the diameter is d, the ratio H 1 / d of the shoulder height H 1 to the ball diameter d of the ball is in the range of less than 0.25 to 0.50, the inner race is fitted to the shaft, In a deep groove ball bearing that is used by positioning the back of the large-diameter shoulder side of the inner race with the shoulder provided on the shaft, the shoulder height of the inner race is high. A configuration is adopted in which an inclined ball guide surface is formed on at least one of the outer peripheral edge of the rear surface on the large shoulder side and the inner peripheral edge of the front surface on the large shoulder side where the shoulder height of the outer race is low. .

ここで、背面とは、ＪＩＳに規定されているように、スラスト荷重を受ける側の側面をいい、正面とは、スラスト荷重を受ける側の反対側の側面をいう。   Here, as defined in JIS, the back surface refers to the side surface on the side receiving the thrust load, and the front surface refers to the side surface on the opposite side to the side receiving the thrust load.

上記のように、内方軌道輪における大径肩側の背面の外周縁部と外方軌道輪における大径肩側の正面の内周縁部の少なくとも一方に傾斜状のボール案内面を形成することにより、内方軌道輪と外方軌道輪間に対してボールを組み入れる際のボール組込み用入口の拡径化を図ることができ、内方軌道輪と外方軌道輪間にボールを容易に組込むことができる。   As described above, an inclined ball guide surface is formed on at least one of the outer peripheral edge of the back surface on the large diameter shoulder side of the inner raceway and the inner peripheral edge portion of the front surface on the large diameter shoulder side of the outer raceway. This makes it possible to increase the diameter of the entrance for incorporating the ball between the inner raceway and the outer raceway, so that the ball can be easily incorporated between the inner raceway and the outer raceway. be able to.

ここで、傾斜状のボール案内面は、円弧面からなるものであってもよく、あるいは、傾斜面からなるものであってもよい。   Here, the inclined ball guide surface may be a circular arc surface, or may be an inclined surface.

この発明に係る深みぞ玉軸受において、ボール案内面の面取り幅が大きくなり過ぎると、内方軌道輪に形成されたボール案内面の大径端縁が軸に形成された肩の側面に当接して、その大径端縁が損傷し易くなるため、ボール案内面における径方向の面取り幅が、前記軸側の肩径の６〜８％程度とするのがよい。   In the deep groove ball bearing according to the present invention, when the chamfer width of the ball guide surface becomes too large, the large-diameter end edge of the ball guide surface formed on the inner race is in contact with the side surface of the shoulder formed on the shaft. Since the large-diameter end edge is easily damaged, the radial chamfer width of the ball guide surface is preferably about 6 to 8% of the shoulder diameter on the shaft side.

上記ボール案内面は、軸方向の面取り幅と径方向の面取り幅とが同一とされたものであってもよく、軸方向の面取り幅が径方向の面取り幅より大きくされたものであってもよい。   The ball guide surface may have the same axial chamfer width and radial chamfer width, or may have an axial chamfer width larger than the radial chamfer width. Good.

この発明においては、上記のように、内方軌道輪における大径肩側の背面の外周縁部と外方軌道輪における大径肩側の正面の内周縁部の少なくとも一方に傾斜状のボール案内面を形成したことにより、ボール組入れ時の入口の拡径化を図ることができ、内方軌道輪と外方軌道輪間に対するボールの組込み性の向上を図ることができる。   In the present invention, as described above, an inclined ball guide is provided on at least one of the outer peripheral edge of the rear surface on the large diameter shoulder side of the inner race and the inner peripheral edge of the front surface of the outer race on the large diameter shoulder side. By forming the surface, it is possible to increase the diameter of the entrance when the ball is assembled, and it is possible to improve the assembling property of the ball between the inner raceway and the outer raceway.

この発明に係る深みぞ玉軸受の実施の形態を示す縦断面図Longitudinal sectional view showing an embodiment of a deep groove ball bearing according to the present invention 図１の一部を拡大して示す断面図Sectional drawing which expands and shows a part of FIG. （ａ）乃至（ｃ）は、面取りの形成例を示す断面図(A) thru | or (c) is sectional drawing which shows the formation example of chamfering この発明に係る深みぞ玉軸受の使用状態を示す断面図Sectional drawing which shows the use condition of the deep groove ball bearing which concerns on this invention

以下、この発明の実施の形態を図面に基づいて説明する。図１に示すように、深みぞ玉軸受Ａは、外方軌道輪としての外輪１１と、内方軌道輪としての内輪２１と、外輪１１の内径面に形成された軌道溝１２と内輪２１の外径面に設けられた軌道溝２２間に組み込まれたボール３１と、そのボール３１を保持する保持器４０とを有している。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the deep groove ball bearing A includes an outer ring 11 as an outer race ring, an inner ring 21 as an inner race ring, a raceway groove 12 formed on an inner diameter surface of the outer ring 11, and an inner ring 21. It has the ball | bowl 31 integrated between the track grooves 22 provided in the outer-diameter surface, and the holder | retainer 40 holding the ball | bowl 31. FIG.

外輪１１の軌道溝１２の両側に形成された一対の肩１３ａ、１３ｂのうち、軌道溝１２の一側方に位置する肩１３ａの高さは他側方に位置する肩１３ｂの高さよりも高くなっている。一方、内輪２１の軌道溝２２の両側に形成された一対の肩２３ａ、２３ｂのうち、軌道溝２２の他側方に位置する肩２３ｂの高さは一側方に位置する肩２３ａの高さより高くなっている。   Of the pair of shoulders 13a and 13b formed on both sides of the raceway groove 12 of the outer ring 11, the height of the shoulder 13a located on one side of the raceway groove 12 is higher than the height of the shoulder 13b located on the other side. It has become. On the other hand, of the pair of shoulders 23a and 23b formed on both sides of the raceway groove 22 of the inner ring 21, the height of the shoulder 23b located on the other side of the raceway groove 22 is higher than the height of the shoulder 23a located on one side. It is high.

ここで、高さの低い肩１３ｂおよび２３ａの肩の高さは、ＪＩＳに規定される標準型深みぞ玉軸受の肩と同じ高さとされているが、標準型深みぞ玉軸受の肩の高さより低くしてもよい。   Here, the shoulder heights of the low shoulders 13b and 23a are the same as the shoulders of the standard type deep groove ball bearings defined in JIS, but the shoulder heights of the standard type deep groove ball bearings are the same. It may be lower.

なお、説明の都合上、高さの高い肩１３ａ、２３ｂをスラスト負荷側の肩１３ａ、２３ｂといい、高さの低い肩１３ｂ、２３ａをスラスト非負荷側の肩１３ｂ、２３ａという。   For convenience of explanation, the high shoulders 13a and 23b are referred to as thrust load side shoulders 13a and 23b, and the low shoulders 13b and 23a are referred to as thrust non-load side shoulders 13b and 23a.

スラスト負荷側の肩１３ａ、２３ｂの肩高さをＨ１とし、ボール３１の球径をｄとすると、ボール３１の球径ｄに対する肩高さＨ１の比率Ｈ１／ｄは、Ｈ１／ｄ＝０．２５〜０．５０未満の範囲とされている。 Thrust load side of the shoulder 13a, the shoulder height of 23b as H 1, when the spherical diameter of the ball 31 is d, the ratio H 1 / d of the shoulder height H 1 relative to the spherical diameter d of the ball 31, H 1 / d = 0.25 to less than 0.50.

保持器４０は、第１分割保持器４１と、第２分割保持器４２とからなる。第１分割保持器４１および第２分割保持器４２のそれぞれは、複数の半球状のポケット部４３を一側部に有する冠形分割保持器からなり、第１分割保持器４１の内径は第２分割保持器４２の外径より小径とされ、第１分割保持器４１内に第２分割保持器４２が嵌合可能とされている。   The holder 40 includes a first divided holder 41 and a second divided holder 42. Each of the first divided holder 41 and the second divided holder 42 includes a crown-shaped divided holder having a plurality of hemispherical pockets 43 on one side, and the inner diameter of the first divided holder 41 is the second. The outer diameter of the split holder 42 is smaller than the outer diameter, and the second split holder 42 can be fitted into the first split holder 41.

また、第１分割保持器４１は、外輪１１の高さの低い大径肩１３ｂと内輪２１の高さの高い大径肩２３ｂの対向面間から軸受内部に挿入可能とされている。一方、第２分割保持器４２は、外輪１１の高さの高い小径肩１３ａと内輪２１の高さの低い小径肩２３ａの対向面間から軸受内部に挿入可能とされている。   Further, the first split cage 41 can be inserted into the bearing from between the opposing surfaces of the large-diameter shoulder 13b having a low height of the outer ring 11 and the large-diameter shoulder 23b having a high height. On the other hand, the second split cage 42 can be inserted into the bearing from between the opposing surfaces of the small-diameter shoulder 13a with the high height of the outer ring 11 and the small-diameter shoulder 23a with the low height of the inner ring 21.

第１分割保持器４１と第２分割保持器４２は、内外に嵌合されて半球状ポケット部４３が球状のポケットを形成する組み合わせとされる。その組み合わせにおいて、第１分割保持器４１に設けられた内向き係合爪４４が第２分割保持器４２の外径面に形成された係合凹部４５に係合し、また、第２分割保持器４２に設けられた外向き係合爪４６が第１分割保持器４１の内径面に形成された係合凹部４７に係合する。その係合により、第１分割保持器４１と第２分割保持器４２は、軸方向に非分離とされる。   The 1st division holder 41 and the 2nd division holder 42 are made into the combination which is fitted inside and outside, and the hemispherical pocket part 43 forms a spherical pocket. In the combination, the inward engagement claw 44 provided on the first split holder 41 engages with the engagement recess 45 formed on the outer diameter surface of the second split holder 42, and the second split holder. An outward engagement claw 46 provided on the container 42 engages with an engagement recess 47 formed on the inner diameter surface of the first split holder 41. By the engagement, the first divided holder 41 and the second divided holder 42 are not separated in the axial direction.

図４は、上記の構成からなる深みぞ玉軸受Ａの使用例を示し、内輪２１は軸５０に嵌合され、その軸５０に形成された肩５１で内輪２１の大径肩２３ｂ側の背面２４を位置決めして、軸５０の肩５１から内輪２１の大径肩２３ｂの背面２４にスラスト荷重が負荷されるようにしている。   FIG. 4 shows an example of use of the deep groove ball bearing A having the above-described configuration, in which the inner ring 21 is fitted to the shaft 50, and the back surface of the inner ring 21 on the large-diameter shoulder 23 b side with the shoulder 51 formed on the shaft 50. 24 is positioned so that a thrust load is applied from the shoulder 51 of the shaft 50 to the back surface 24 of the large-diameter shoulder 23 b of the inner ring 21.

深みぞ玉軸受Ａにおいて、ボール３１の組込みに際しては、図２に示すように、外輪１１内に組み込まれた内輪２１を径方向にオフセットして、内輪２１の外径面の一部を外輪１１の内径面の一部に当接し、その当接部位から周方向に１８０度ずれた位置に三日月形の空間を形成し、その空間の一側方から内部にボール３１を組込むようにする。   In the deep groove ball bearing A, when the ball 31 is assembled, as shown in FIG. 2, the inner ring 21 incorporated in the outer ring 11 is offset in the radial direction, and a part of the outer diameter surface of the inner ring 21 is set to the outer ring 11. A crescent-shaped space is formed at a position that is in contact with a part of the inner diameter surface of the inner surface and is shifted 180 degrees in the circumferential direction from the contact portion, and the ball 31 is incorporated into the inside from one side of the space.

そのボール３１の組込みに際して、外輪１１のスラスト負荷側の肩１３ａや内輪２１のスラスト負荷側の肩２３ｂの肩高さＨ１が必要以上に高い場合は、ボール３１の組込みを阻害することになるが、実施の形態では、ボール３１の球径ｄに対する肩高さＨ１の比率Ｈ１／ｄが、０．５未満とされているため、外輪１１と内輪２１間にボール３１を確実に組込むことができる。 Upon incorporation of the balls 31, shoulder when the height H 1 is higher than necessary for the thrust load side of the shoulder 23b of the thrust load side of the shoulder 13a and the inner ring 21 of the outer ring 11, will inhibit the incorporation of the balls 31 However, in the embodiment, since the ratio H 1 / d of the shoulder height H 1 to the ball diameter d of the ball 31 is less than 0.5, the ball 31 is reliably incorporated between the outer ring 11 and the inner ring 21. be able to.

上記のようなボール３１の組込みにおいて、その組込み性を高めるため、図２および図３（ａ）に示すように、外輪１１における大径肩１３ｂ側の正面１４の内周縁部と内輪２１における大径肩２３ｂ側の背面２４の外周縁部のそれぞれに傾斜状のボール案内面２５を形成している。   In order to enhance the assemblability of the ball 31 as described above, as shown in FIGS. 2 and 3A, the inner peripheral edge of the front surface 14 on the large-diameter shoulder 13b side of the outer ring 11 and the inner ring 21 are large. An inclined ball guide surface 25 is formed on each of the outer peripheral edges of the back surface 24 on the side of the radial shoulder 23b.

ここで、深みぞ玉軸受においては、一般的に、内輪の背面および正面の外周縁や外輪の背面や正面の内周縁に面取りが形成される。その面取りは、打ちキズ防止のために形成されるものであり、面取り幅は、図４に示される肩５１の外径ｄａの１．５％程度であって、１ｍｍに満たない大きさのものである。   Here, in the deep groove ball bearing, generally, chamfering is formed on the rear and front outer peripheral edges of the inner ring, the rear face of the outer ring and the inner peripheral edge of the front. The chamfering is formed to prevent scratching, and the chamfering width is about 1.5% of the outer diameter da of the shoulder 51 shown in FIG. 4 and has a size less than 1 mm. It is.

これに対し、図３（ａ）に示される傾斜状のボール案内面２５は、その面取り幅ｗが、最大で、図４に示される肩５１の外径ｄａの６〜８％程度の大きさ、すなわち、ｗ＝（０．０６〜０．０８）×ｄａの大きさとされている。   In contrast, the inclined ball guide surface 25 shown in FIG. 3A has a chamfer width w of a maximum of about 6 to 8% of the outer diameter da of the shoulder 51 shown in FIG. That is, the size is w = (0.06-0.08) × da.

上記のように、外輪１１における大径肩１３ｂ側の正面１４の内周縁部と内輪２１における大径肩２３ｂ側の背面２４の外周縁部のそれぞれに、面取り幅が肩５１の外径ｄａの６〜８％程度の大きさとされる傾斜状のボール案内面２５を形成することにより、外輪１１と内輪２１間にボール３１を組み入れる際のボール挿入用入口の拡径化を図ることができる。その結果、外輪１１と内輪２１間にボール３１を容易に組込むことができる。   As described above, the chamfer width of the outer diameter da of the shoulder 51 is equal to each of the inner peripheral edge portion of the front surface 14 on the large-diameter shoulder 13 b side of the outer ring 11 and the outer peripheral edge portion of the rear surface 24 on the large-diameter shoulder 23 b side of the inner ring 21. By forming the inclined ball guide surface 25 having a size of about 6 to 8%, it is possible to increase the diameter of the ball insertion inlet when the ball 31 is incorporated between the outer ring 11 and the inner ring 21. As a result, the ball 31 can be easily assembled between the outer ring 11 and the inner ring 21.

また、面取り幅ｗを肩５１の外径ｄａの６〜８％程度の大きさとすることにより、傾斜状のボール案内面２５の大径縁は軸５０の肩５１の側面から径方向外方に露出することになり、肩５１の側面からの押圧により、傾斜状のボール案内面２５の大径縁が損傷するのを防止することができる。   Further, by setting the chamfer width w to be about 6 to 8% of the outer diameter da of the shoulder 51, the large-diameter edge of the inclined ball guide surface 25 extends radially outward from the side surface of the shoulder 51 of the shaft 50. As a result, the large-diameter edge of the inclined ball guide surface 25 can be prevented from being damaged by the pressing from the side surface of the shoulder 51.

図３（ａ）では、外輪１１における大径肩１３ｂ側の正面１４の内周縁部と内輪２１における大径肩２３ｂ側の背面２４の外周縁部のそれぞれにボール案内面２５を形成したが、図３（ｂ）に示すように、内輪２１における大径肩２３ｂ側の背面２４の外周縁部にのみにボール案内面２５を形成してもよく、あるいは、図３（ｃ）で示すように、外輪１１における大径肩１３ｂ側の正面１４の内周縁部にボール案内面２５を形成してもよい。   In FIG. 3A, the ball guide surfaces 25 are formed on the inner peripheral edge of the front surface 14 of the outer ring 11 on the large diameter shoulder 13b side and the outer peripheral edge of the rear surface 24 of the inner ring 21 on the large diameter shoulder 23b side. As shown in FIG. 3 (b), the ball guide surface 25 may be formed only on the outer peripheral edge of the back surface 24 on the large-diameter shoulder 23b side of the inner ring 21, or as shown in FIG. 3 (c). The ball guide surface 25 may be formed on the inner peripheral edge of the front surface 14 of the outer ring 11 on the large diameter shoulder 13b side.

上記のようなボール組込み誘導用の面取り２５は、外輪１１における大径肩１３ｂ側の背面の内周縁部や内輪２１における大径肩２３ｂ側の正面の外周縁部に設けるようにしてもよい。   The above-described chamfering 25 for ball incorporation guidance may be provided on the inner peripheral edge of the back surface of the outer ring 11 on the large diameter shoulder 13b side or on the outer peripheral edge portion of the inner ring 21 on the front surface on the large diameter shoulder 23b side.

また、図３では、傾斜状のボール案内面２５として、円弧状のものを示したが、傾斜面からなるものであってもよい。面取り２５は、径方向の面取り幅ｗと軸方向の面取り幅ｗが同じ大きさのものを示したが、軸方向の面取り幅を径方向の面取り幅より大きくしてもよい。   In FIG. 3, the inclined ball guide surface 25 is an arcuate shape, but may be an inclined surface. The chamfer 25 has the same chamfer width w in the radial direction and the chamfer width w in the axial direction. However, the chamfer width in the axial direction may be larger than the chamfer width in the radial direction.

１１ 外輪（外方軌道輪）
１２ 軌道溝
１３ａ 肩
１３ｂ 肩
１４ 正面
２１ 内輪（内方軌道輪）
２２ 軌道溝
２３ａ 肩
２３ｂ 肩
２４ 背面
２５ ボール案内面
３１ ボール
４０ 保持器
５０ 軸
５１ 肩 11 Outer ring (outer raceway)
12 Track groove 13a Shoulder 13b Shoulder 14 Front 21 Inner ring (Inner race ring)
22 Track groove 23a Shoulder 23b Shoulder 24 Back surface 25 Ball guide surface 31 Ball 40 Cage 50 Shaft 51 Shoulder

Claims (5)

内径面に軌道溝を有する外方軌道輪と、外径面に軌道溝を有する内方軌道輪と、外方軌道輪の軌道溝と内方軌道輪の軌道溝間に組込まれたボールと、そのボールを保持する保持器とからなり、前記外方軌道輪における軌道溝の一側の肩と前記内方軌道輪における軌道溝の他側の肩の高さを、外方軌道輪の他側の肩と前記内方軌道輪の一側の肩の高さより高くし、その高さの高い肩の肩高さをＨ１、ボールの球径をｄとしたとき、ボールの球径ｄに対する肩高さＨ１の比率Ｈ１／ｄを０．２５〜０．５０未満の範囲とし、前記内方軌道輪を軸に嵌合し、その軸に設けられた肩で内方軌道輪の大径肩側の背面を位置決めして使用される深みぞ玉軸受において、
前記内方軌道輪の肩高さの高い大径肩側の背面の外周縁部と外方軌道輪の肩高さの低い大径肩側の正面の内周縁部の少なくとも一方に傾斜状のボール案内面を形成したことを特徴とする深みぞ玉軸受。 An outer race having a raceway groove on the inner diameter surface, an inner race having a raceway groove on the outer diameter surface, a ball incorporated between the raceway groove of the outer raceway and the raceway groove of the inner raceway, A cage for holding the ball, and the height of the shoulder on one side of the raceway groove on the outer raceway and the shoulder on the other side of the raceway groove on the inner raceway is set on the other side of the outer raceway. When the shoulder height of the shoulder of the ball is higher than the height of the shoulder of the inner raceway and one side of the inner race, H 1 is the shoulder height of the higher shoulder, and d is the ball diameter of the ball, the shoulder with respect to the ball diameter d of the ball The ratio H 1 / d of the height H 1 is set to a range of 0.25 to less than 0.50, the inner race is fitted to the shaft, and a large diameter of the inner race is formed by a shoulder provided on the shaft. In deep groove ball bearings used by positioning the back side of the shoulder side,
A slanted ball on at least one of the outer peripheral edge of the rear surface of the large-diameter shoulder with a high shoulder height of the inner race and the inner peripheral edge of the front of the large-diameter shoulder with a lower shoulder height of the outer race. A deep groove ball bearing characterized by forming a guide surface. 前記ボール案内面が、円弧面からなる請求項１に記載の深みぞ玉軸受。   The deep groove ball bearing according to claim 1, wherein the ball guide surface is an arc surface. 前記ボール案内面が、傾斜面からなる請求項１に記載の深みぞ玉軸受。   The deep groove ball bearing according to claim 1, wherein the ball guide surface is an inclined surface. 前記ボール案内面における径方向の面取り幅が、前記軸側の肩径の６〜８％とされた請求項１乃至３のいずれか１項に記載の深みぞ玉軸受。   The deep groove ball bearing according to any one of claims 1 to 3, wherein a chamfering width in a radial direction of the ball guide surface is 6 to 8% of a shoulder diameter on the shaft side. 前記ボール案内面の軸方向の面取り幅を径方向の面取り幅より大きくした請求項１乃至４のいずれか１項に記載の深みぞ玉軸受。   The deep groove ball bearing according to any one of claims 1 to 4, wherein a chamfer width in an axial direction of the ball guide surface is larger than a chamfer width in a radial direction.
JP2012251388A 2012-11-15 2012-11-15 Deep groove ball bearing Pending JP2014098460A (en)

Priority Applications (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016076152A1 (en) * 2014-11-10 2016-05-19 Ntn株式会社 Assembly method for deep groove ball bearing and deep groove ball bearing
JP2019060487A (en) * 2017-09-26 2019-04-18 日本精工株式会社 Single-row deep groove ball bearing and manufacturing method thereof
JP2020122556A (en) * 2019-01-31 2020-08-13 日本精工株式会社 Multipoint contact ball bearing

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016076152A1 (en) * 2014-11-10 2016-05-19 Ntn株式会社 Assembly method for deep groove ball bearing and deep groove ball bearing
JP2016090015A (en) * 2014-11-10 2016-05-23 Ntn株式会社 Assembling method of deep-groove ball bearing and deep-groove ball bearing
JP2019060487A (en) * 2017-09-26 2019-04-18 日本精工株式会社 Single-row deep groove ball bearing and manufacturing method thereof
JP2022009464A (en) * 2017-09-26 2022-01-14 日本精工株式会社 Single-row deep groove ball bearing and manufacturing method thereof
JP2020122556A (en) * 2019-01-31 2020-08-13 日本精工株式会社 Multipoint contact ball bearing

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