JP2002295478A - Single row ball turning bearing - Google Patents
Single row ball turning bearingInfo
- Publication number
- JP2002295478A JP2002295478A JP2001094897A JP2001094897A JP2002295478A JP 2002295478 A JP2002295478 A JP 2002295478A JP 2001094897 A JP2001094897 A JP 2001094897A JP 2001094897 A JP2001094897 A JP 2001094897A JP 2002295478 A JP2002295478 A JP 2002295478A
- Authority
- JP
- Japan
- Prior art keywords
- ball
- cage
- circumferential direction
- retainer
- 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
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
- 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
- F16C19/16—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 a single row of balls
- F16C19/163—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 a single row of balls with angular contact
- F16C19/166—Four-point-contact ball bearings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ターンテーブル
を旋回可能に支持する単列玉旋回軸受に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-row ball slewing bearing for rotatably supporting a turntable.
【０００２】[0002]
【従来の技術】建設機械、荷役機械、工作機械等の各種
機械や、パラボラアンテナ、廻り舞台等の各種装置に使
用されるターンテーブルを旋回可能に支持する旋回軸受
には、玉軸受タイプ、ころ軸受タイプ、クロスローラタ
イプ等、種々の型式のものがある。この旋回軸受には、
アキシアル荷重とラジアル荷重の他に、ターンテーブル
が受ける偏荷重に伴ってモーメント荷重も負荷される。2. Description of the Related Art A slewing bearing for rotatably supporting a turntable used for various machines such as a construction machine, a cargo handling machine, a machine tool, and various devices such as a parabolic antenna and a rotating stage is a ball bearing type, a roller. There are various types such as a bearing type and a cross roller type. This slewing bearing
In addition to the axial load and the radial load, a moment load is also applied along with the eccentric load applied to the turntable.
【０００３】このうち、図５に示すように、内輪１と外
輪２の各軌道面３、４をそれぞれ２つの曲面で形成し、
これらの軌道面３、４間に単列の複数のボール５を保持
器６で保持し、各ボール５を各軌道面３、４と４点接触
させる単列玉旋回軸受は、転動体としてのボール５が両
軌道面３、４間にしっかりと挟持され、かつ、それぞれ
一体に形成された内外輪１、２の剛性も高いので、簡単
な構成で負荷容量の高いものを得ることができる。As shown in FIG. 5, each of the raceway surfaces 3 and 4 of the inner ring 1 and the outer ring 2 is formed by two curved surfaces, respectively.
A single-row ball slewing bearing that holds a plurality of single-row balls 5 between the raceway surfaces 3 and 4 with a retainer 6 and makes each ball 5 contact the raceway surfaces 3 and 4 at four points is a rolling element. Since the ball 5 is firmly held between the two raceway surfaces 3 and 4 and the rigidity of the inner and outer races 1 and 2 formed integrally with each other is high, a high load capacity can be obtained with a simple configuration.
【０００４】この単列玉旋回軸受は、内輪１の内周にタ
ーンテーブルの駆動軸と噛み合う歯車９が設けられ、内
輪１側がターンテーブルと一緒に回転するようになって
いる。外輪の外周に歯車を設け、外輪側をターンテーブ
ルと一緒に回転させるものもある。In this single-row ball slewing bearing, a gear 9 meshing with the drive shaft of the turntable is provided on the inner periphery of the inner ring 1 so that the inner ring 1 rotates together with the turntable. In some cases, a gear is provided on the outer periphery of the outer ring, and the outer ring is rotated together with the turntable.
【０００５】図６（ａ）、（ｂ）に示すように、前記保
持器６はリング状に形成され、その周方向にボール５を
一つずつ保持する複数のポケット１１が設けられてい
る。各ポケット１１は、ボール５の直径に概ね等しい円
形に形成されている。As shown in FIGS. 6 (a) and 6 (b), the retainer 6 is formed in a ring shape, and is provided with a plurality of pockets 11 for holding the balls 5 one by one in the circumferential direction. Each pocket 11 is formed in a circular shape substantially equal to the diameter of the ball 5.
【０００６】[0006]
【発明が解決しようとする課題】上記単列玉旋回軸受
は、ターンテーブルが偏荷重を受けながら旋回すると、
偏荷重に伴うモーメント荷重により、軌道面と接触する
各ボールの接触角が個々に変化する。このように、ボー
ルの接触角が個々に変化すると、その軌道径がボール毎
に異なったものとなり、ボールに相対的な進み遅れ現象
が発生する。In the single row ball slewing bearing, when the turntable turns while receiving an eccentric load,
The contact angle of each ball in contact with the raceway surface changes individually due to the moment load caused by the unbalanced load. As described above, when the contact angles of the balls individually change, the orbit diameters of the balls are different for each ball, and a relative advance / delay phenomenon occurs for the balls.
【０００７】このため、上述した従来の単列玉旋回軸受
は、ボールを保持する保持器に引張荷重や圧縮荷重が作
用し、軸受の円滑な回転が阻害されて、ターンテーブル
の旋回トルクに変動が生じる問題がある。また、保持器
が繰り返しの引張荷重や圧縮荷重を受けて、破損する恐
れもある。For this reason, in the conventional single-row ball slewing bearing described above, a tensile load or a compressive load acts on the cage for holding the ball, which hinders smooth rotation of the bearing and fluctuates in the slewing torque of the turntable. There is a problem that occurs. Further, the cage may be damaged due to repeated tensile load and compressive load.
【０００８】そこで、この発明の課題は、偏荷重を受け
るターンテーブルを円滑に旋回できる単列玉旋回軸受を
提供することである。An object of the present invention is to provide a single-row ball slewing bearing that can smoothly turn a turntable that receives an eccentric load.
【０００９】[0009]
【課題を解決するための手段】上記の課題を解決するた
めに、この発明は、内輪および外輪の各軌道面がそれぞ
れ２つの曲面で形成され、これらの軌道面間に単列の複
数のボールが保持器のポケットに周方向で保持され、ラ
ジアル荷重が作用したとき、これらのボールが前記内外
輪の軌道面と４点接触する単列玉旋回軸受において、前
記保持器を周方向の少なくとも１箇所で分断した構成を
採用したものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to an inner ring and an outer ring in which each of the raceways is formed by two curved surfaces, and a plurality of balls in a single row are interposed between the raceways. Are held in the pocket of the cage in the circumferential direction, and when a radial load is applied, these balls are in four-point contact with the raceway surfaces of the inner and outer rings. It adopts a configuration that is divided at the points.
【００１０】すなわち、内外輪の軌道面間にボールを周
方向に保持する保持器を周方向の少なくとも１箇所で分
断することにより、モーメント荷重によるボールの相対
的な進み遅れ現象が発生しても、保持器に引張荷重や圧
縮荷重が作用せず、軸受が円滑に回転し、かつ、保持器
も破損しないようにした。That is, even if a relative advance / delay phenomenon of the ball due to the moment load occurs by dividing the retainer for holding the ball in the circumferential direction between the raceway surfaces of the inner and outer rings at at least one position in the circumferential direction. In addition, no tensile load or compressive load acts on the cage, the bearing rotates smoothly, and the cage is not damaged.
【００１１】また、この発明は、内輪および外輪の各軌
道面がそれぞれ２つの曲面で形成され、これらの軌道面
間に単列の複数のボールが保持器のポケットに周方向で
保持され、ラジアル荷重が作用したとき、これらのボー
ルが前記内外輪の軌道面と４点接触する単列玉旋回軸受
において、前記保持器の周方向での前記ポケットの長さ
寸法を、前記ボールの直径よりも大きくした構成も採用
した。Further, according to the present invention, each of the raceways of the inner race and the outer race is formed of two curved surfaces, and between the raceways, a plurality of balls in a single row are held in a pocket of a retainer in a circumferential direction. In a single-row ball slewing bearing in which these balls make four-point contact with the raceway surfaces of the inner and outer races when a load is applied, the length dimension of the pocket in the circumferential direction of the retainer is made larger than the diameter of the ball. A larger configuration was also employed.
【００１２】すなわち、ポケットの保持器周方向での長
さ寸法をボールの直径よりも大きくすることにより、各
ポケット内での前記ボールの進み遅れを許容して、同様
に、軸受が円滑に回転し、かつ、保持器も破損しないよ
うにした。That is, by making the length of the pocket in the circumferential direction of the cage larger than the diameter of the ball, the advance and delay of the ball in each pocket is allowed, and the bearing rotates smoothly. In addition, the cage was not damaged.
【００１３】前記周方向の少なくとも１箇所で分断した
保持器の前記ポケットの保持器周方向での長さ寸法を、
前記ボールの直径よりも大きくすることにより、各ポケ
ット内での前記ボールの進み遅れを許容し、より円滑に
軸受を回転させることができる。[0013] The length of the pocket of the cage divided at at least one position in the circumferential direction in the circumferential direction of the cage is
By making the diameter larger than the diameter of the ball, advance and delay of the ball in each pocket is allowed, and the bearing can be rotated more smoothly.
【００１４】前記ポケットの保持器周方向での長さ寸法
を、保持器軸方向での長さ寸法よりも大きくすることに
より、保持器軸方向でのポケットの長さ寸法はボールの
直径と同等として、保持器の軸方向でのがたを小さくす
ることができる。By making the length of the pocket in the circumferential direction of the cage larger than the length in the axial direction of the cage, the length of the pocket in the axial direction of the cage is equal to the diameter of the ball. As a result, the backlash in the axial direction of the cage can be reduced.
【００１５】前記ポケットの保持器周方向での長さ寸法
は、前記ボールの直径の１．２倍以上で、２．５倍未満
とするのが望ましい。The length of the pocket in the circumferential direction of the cage is preferably at least 1.2 times the diameter of the ball and less than 2.5 times.
【００１６】すなわち、ポケットの保持器周方向での長
さ寸法が、ボール直径の１．２倍未満では、前記ボール
の進み遅れの許容量がやや不足し、ボール直径の２．５
倍を越えると、軌道面間に配列できるボールの個数が少
なくなり、軸受の負荷容量が低下する。That is, if the length of the pocket in the circumferential direction of the retainer is less than 1.2 times the ball diameter, the permissible amount of advance / delay of the ball is slightly insufficient, and the pocket diameter is 2.5 times the ball diameter.
If it exceeds twice, the number of balls that can be arranged between the raceway surfaces decreases, and the load capacity of the bearing decreases.
【００１７】[0017]
【発明の実施の形態】以下、図１乃至図４に基づき、こ
の発明の実施形態を説明する。図１および図２は、第１
の実施形態を示す。この単列玉旋回軸受は、図１に示す
ように、内輪１と外輪２の各軌道面３、４がそれぞれ２
つの曲面で形成され、これらの軌道面３、４間に単列の
複数のボール５が保持器６で保持され、各ボール５が各
軌道面３、４と４点接触するようになっている。ボール
５が保持された軌道面３、４間にはグリースが充填さ
れ、その上下端部は、それぞれシール部材７ａ、７ｂで
シールされている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 and FIG.
An embodiment will be described. As shown in FIG. 1, this single-row ball slewing bearing has two raceway surfaces 3 and 4 of an inner ring 1 and an outer ring 2.
A single row of a plurality of balls 5 is held by a retainer 6 between the track surfaces 3 and 4 so that each ball 5 comes into contact with each of the track surfaces 3 and 4 at four points. . Grease is filled between the raceway surfaces 3 and 4 where the ball 5 is held, and upper and lower ends thereof are sealed by seal members 7a and 7b, respectively.
【００１８】前記内輪１は、ターンテーブル取付け用の
ねじ孔８が設けられ、その内周には、ターンテーブルの
駆動軸と噛み合う歯車９が設けられている。また、外輪
２には、固定座への取付け用のボルト孔１０が設けられ
ている。なお、図示は省略するが、内輪１にはボール５
を軌道面３、４間に入れる穴が設けられ、この穴が止め
栓で閉じられるようになっている。The inner ring 1 is provided with a screw hole 8 for attaching a turntable, and a gear 9 which meshes with a drive shaft of the turntable is provided on the inner periphery thereof. The outer race 2 is provided with a bolt hole 10 for attachment to a fixed seat. Although not shown, the inner ring 1 has a ball 5
Is provided between the raceway surfaces 3 and 4, and this hole is closed with a stopper plug.
【００１９】前記保持器６は、図２（ａ）に示すよう
に、リング状のものを周方向で８個のセグメント６ａに
等分割したものであり、図２（ｂ）に示すように、各セ
グメント６ａには、ボール５を一つずつ保持する複数の
長円状ポケット１１が設けられている。各ポケット１１
の周方向の長さ寸法Ｌは、ボール５の直径の概ね２倍に
形成されている。なお、各ポケット１１の軸方向の長さ
寸法は、ボール５の直径と概ね等しくなっている。As shown in FIG. 2A, the retainer 6 is formed by equally dividing a ring-shaped one into eight segments 6a in the circumferential direction. As shown in FIG. Each segment 6a is provided with a plurality of oblong pockets 11 for holding the balls 5 one by one. Each pocket 11
Is formed to be approximately twice the diameter of the ball 5. The axial length of each pocket 11 is approximately equal to the diameter of the ball 5.
【００２０】図３は、第２の実施形態を示す。この単列
玉旋回軸受は、基本的な構成は図１に示した第１の実施
形態のものと同じであり、保持器６の形態のみが異な
る。この保持器６は、図３（ａ）に示すように、リング
状のものを周方向の１箇所で分断したものであり、図３
（ｂ）に示すように、ボール５を保持するポケット１１
は、図６（ｂ）に示した従来のものと同様に、ボール５
の直径に概ね等しい円形に形成されている。FIG. 3 shows a second embodiment. This single-row ball slewing bearing has the same basic configuration as that of the first embodiment shown in FIG. 1 except for the form of the retainer 6. As shown in FIG. 3A, the retainer 6 is obtained by dividing a ring-shaped member at one location in the circumferential direction.
As shown in (b), a pocket 11 for holding the ball 5
Is a ball 5 similar to the conventional one shown in FIG.
Is formed in a circular shape substantially equal to the diameter of
【００２１】上述した各実施形態では、ターンテーブル
の駆動軸と噛み合う歯車を内輪側に設けたが、本発明に
係る単列玉旋回軸受は、この歯車を外輪側に設けたもの
にも採用できることは勿論である。In each of the embodiments described above, the gear meshing with the drive shaft of the turntable is provided on the inner ring side. However, the single-row ball slewing bearing according to the present invention can also be adopted in a case where this gear is provided on the outer ring side. Of course.
【００２２】また、上述した実施形態では、保持器を周
方向の１箇所と８箇所とで分断した例を示したが、この
分断箇所数は任意に選定することができ、かつ、２箇所
以上で分断して複数のセグメントとする場合は、必ずし
も各セグメントは等分割されたものでなくてもよい。Further, in the above-described embodiment, an example is shown in which the retainer is divided into one and eight places in the circumferential direction. However, the number of the divided parts can be arbitrarily selected, and two or more parts are provided. In the case where a plurality of segments are divided by the above, each segment does not necessarily have to be equally divided.
【００２３】以下に、実施例および比較例を挙げる。Examples and comparative examples will be described below.
【００２４】[0024]
【実施例】図１および図２に示した第１の実施形態の単
列玉旋回軸受（実施例１）と、図３に示した第２の実施
形態の単列玉旋回軸受（実施例２）とを用意した。DESCRIPTION OF THE PREFERRED EMBODIMENTS The single-row ball slewing bearing of the first embodiment shown in FIGS. 1 and 2 (Example 1) and the single-row ball slewing bearing of the second embodiment shown in FIG. 3 (Example 2) ) And prepared.
【００２５】[0025]
【比較例】図５および図６に示した従来の単列玉旋回軸
受（比較例１）を用意した。なお、各軸受のボールのピ
ッチ円直径は、実施例、比較例とも、６５０ｍｍであ
る。Comparative Example A conventional single-row ball slewing bearing (Comparative Example 1) shown in FIGS. 5 and 6 was prepared. In addition, the pitch circle diameter of the ball of each bearing is 650 mm in both the example and the comparative example.
【００２６】上記実施例および比較例の各単列玉旋回軸
受について、±１８０°の旋回試験を行ない、プッシュ
プルゲージを用いて旋回時の旋回トルクを測定した。For each of the single-row ball slewing bearings of the examples and the comparative examples, a slewing test of ± 180 ° was performed, and the slewing torque during the slewing was measured using a push-pull gauge.
【００２７】試験条件は以下の通りである。 ・アキシアル荷重：３０４０Ｎ ・モーメント荷重：４６０９Ｎｍ ・試験温度 ：室温The test conditions are as follows.・ Axial load: 3040N ・ Moment load: 4609Nm ・ Test temperature: room temperature
【００２８】[0028]
【表１】 [Table 1]
【００２９】表１に測定された旋回トルクのピーク値を
示す。また、図４には、実施例１のものの旋回トルクの
変化を示す。これらの測定結果からも分かるように、各
実施例の旋回トルクのピーク値は、概ね比較例のものの
半分以下である。特に、保持器６を分割し、かつ、ポケ
ット１１の長さ寸法Ｌをボール５の直径よりも大きくし
た実施例１は、ピーク値が比較例の１／３以下で、旋回
トルクの変化も小さい。Table 1 shows the peak values of the measured turning torque. FIG. 4 shows the change of the turning torque of the first embodiment. As can be seen from these measurement results, the peak value of the turning torque in each example is generally less than half that of the comparative example. In particular, in the first embodiment in which the cage 6 is divided and the length L of the pocket 11 is larger than the diameter of the ball 5, the peak value is 1/3 or less of the comparative example, and the change of the turning torque is small. .
【００３０】なお、実施例１のものについては、ポケッ
ト１１の長さ寸法Ｌを、ボール５の直径の２．５倍未満
の範囲で変化させたが、長さ寸法Ｌがボール５の直径の
１．２倍以上の範囲では、図４に示した旋回トルクの変
化とほぼ同等の結果が得られたが、長さ寸法Ｌが１．２
倍未満になると、旋回トルクの変化が次第に大きくな
り、長さ寸法Ｌが１．０倍、すなわちポケット１１を円
形としたときは、実施例２とほぼ同レベルの旋回トルク
を示すようになった。In the first embodiment, the length L of the pocket 11 is changed within a range of less than 2.5 times the diameter of the ball 5, but the length L is smaller than the diameter of the ball 5. In the range of 1.2 times or more, almost the same result as the change of the turning torque shown in FIG. 4 was obtained, but the length L was 1.2 times.
If it is less than twice, the change in the turning torque gradually increases, and when the length dimension L is 1.0 times, that is, when the pocket 11 is made circular, the turning torque shows almost the same level as that of the second embodiment. .
【００３１】[0031]
【発明の効果】以上のように、この発明の単列玉旋回軸
受は、内外輪の軌道面間にボールを周方向に保持する保
持器を周方向の少なくとも１箇所で分断し、モーメント
荷重によるボールの相対的な進み遅れ現象が発生して
も、保持器に引張荷重や圧縮荷重が作用しないようにし
たので、軸受を円滑に回転させて、偏荷重を受けるター
ンテーブルを安定した旋回トルクで旋回させることがで
き、かつ、保持器を破損する恐れもない。As described above, in the single-row ball slewing bearing of the present invention, the cage for holding the ball in the circumferential direction between the raceway surfaces of the inner and outer rings is divided at at least one position in the circumferential direction, and the ball is rotated by the moment load. Even if a relative advance / delay phenomenon of the ball occurs, no tension load or compression load is applied to the retainer. It can be swung and there is no risk of damaging the cage.
【００３２】また、この発明の単列玉旋回軸受は、保持
器の周方向でのポケットの長さ寸法をボールの直径より
も大きくすることによっても、ポケット内でのボールの
進み遅れを許容して、軸受を円滑に回転させるようにし
たので、同様に、偏荷重を受けるターンテーブルを安定
した旋回トルクで旋回させることができ、かつ、保持器
を破損する恐れもない。Further, the single-row ball slewing bearing of the present invention allows advance and delay of the ball in the pocket by making the length of the pocket in the circumferential direction of the cage larger than the diameter of the ball. Thus, since the bearing is smoothly rotated, the turntable receiving the eccentric load can be similarly turned with a stable turning torque, and there is no possibility of damaging the retainer.
【図１】第１の実施形態の単列玉旋回軸受を示す縦断面
図FIG. 1 is a longitudinal sectional view showing a single-row ball slewing bearing according to a first embodiment.
【図２】ａは図１の保持器の平面図、ｂはａの一部省略
展開図2A is a plan view of the cage shown in FIG. 1, and FIG.
【図３】ａは第２の実施形態の単列玉旋回軸受の保持器
を示す平面図、ｂはａの一部省略展開図FIG. 3A is a plan view showing a retainer of the single-row ball slewing bearing according to the second embodiment, and FIG.
【図４】図１の単列玉旋回軸受の旋回試験における旋回
トルクの変化を示すグラフFIG. 4 is a graph showing a change in turning torque in a turning test of the single-row ball turning bearing of FIG. 1;
【図５】従来の単列玉旋回軸受を示す縦断面図FIG. 5 is a longitudinal sectional view showing a conventional single-row ball slewing bearing.
【図６】ａは図５の保持器の平面図、ｂはａの一部省略
展開図6A is a plan view of the cage shown in FIG. 5, and FIG.
１ 内輪 ２ 外輪 ３、４ 軌道面 ５ ボール ６ 保持器 ６ａ セグメント ７ａ、７ｂ シール部材 ８ ねじ穴 ９ 歯車 １０ ボルト孔 １１ ポケット DESCRIPTION OF SYMBOLS 1 Inner ring 2 Outer ring 3, 4 Raceway surface 5 Ball 6 Cage 6a Segment 7a, 7b Sealing member 8 Screw hole 9 Gear 10 Bolt hole 11 Pocket
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2D015 DA00 3J101 AA04 AA32 AA42 AA54 AA62 BA23 BA45 BA53 BA54 BA55 FA41 GA31 GA41 GA51 GA60 ──────────────────────────────────────────────────続 き Continued from the front page F-term (reference) 2D015 DA00 3J101 AA04 AA32 AA42 AA54 AA62 BA23 BA45 BA53 BA54 BA55 FA41 GA31 GA41 GA51 GA60
Claims (6)
つの曲面で形成され、これらの軌道面間に単列の複数の
ボールが保持器のポケットに周方向で保持され、ラジア
ル荷重が作用したとき、これらのボールが前記内外輪の
軌道面と４点接触する単列玉旋回軸受において、前記保
持器を周方向の少なくとも１箇所で分断したことを特徴
とする単列玉旋回軸受。An inner race and an outer race each have two raceway surfaces.
A single row of a plurality of balls is held between the raceway surfaces in a circumferential direction in the pockets of the cage, and when a radial load is applied, these balls are connected to the raceway surfaces of the inner and outer races by four points. In a single-row ball slewing bearing, the cage is divided at at least one position in a circumferential direction.
つの曲面で形成され、これらの軌道面間に単列の複数の
ボールが保持器のポケットに周方向で保持され、ラジア
ル荷重が作用したとき、これらのボールが前記内外輪の
軌道面と４点接触する単列玉旋回軸受において、前記保
持器の周方向での前記ポケットの長さ寸法を、前記ボー
ルの直径よりも大きくしたことを特徴とする単列玉旋回
軸受。2. The raceway surfaces of the inner ring and the outer ring are each 2
A single row of a plurality of balls is held between the raceway surfaces in a circumferential direction in the pockets of the cage, and when a radial load is applied, these balls are connected to the raceway surfaces of the inner and outer races by four points. In a single-row ball slewing bearing, the length of the pocket in the circumferential direction of the retainer is larger than the diameter of the ball.
長さ寸法を、前記ボールの直径よりも大きくした請求項
１に記載の単列玉旋回軸受。3. The single-row ball slewing bearing according to claim 1, wherein a length dimension of the pocket in a circumferential direction of the cage is larger than a diameter of the ball.
法を、保持器軸方向での長さ寸法よりも大きくした請求
項２または３に記載の単列玉旋回軸受。4. The single-row ball slewing bearing according to claim 2, wherein the length of the pocket in the circumferential direction of the cage is larger than the length of the pocket in the axial direction of the cage.
法を、前記ボールの直径の１．２倍以上とした請求項２
乃至４のいずれかに記載の単列玉旋回軸受。5. The length of the pocket in the circumferential direction of the cage is at least 1.2 times the diameter of the ball.
A single-row ball slewing bearing according to any one of claims 1 to 4.
法を、前記ボールの直径の２．５倍未満とした請求項２
乃至５のいずれかに記載の単列玉旋回軸受。6. The length of the pocket in the circumferential direction of the retainer is less than 2.5 times the diameter of the ball.
A single-row ball slewing bearing according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001094897A JP2002295478A (en) | 2001-03-29 | 2001-03-29 | Single row ball turning bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001094897A JP2002295478A (en) | 2001-03-29 | 2001-03-29 | Single row ball turning bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002295478A true JP2002295478A (en) | 2002-10-09 |
Family
ID=18949029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001094897A Pending JP2002295478A (en) | 2001-03-29 | 2001-03-29 | Single row ball turning bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002295478A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011033352A (en) * | 2009-07-29 | 2011-02-17 | Kawasaki Heavy Ind Ltd | Test device for slewing ring bearing |
| WO2018005138A1 (en) * | 2016-06-26 | 2018-01-04 | Atec Corporation | Synthetic resin retainer for large thrust ball bearings with dry-lubricant and wet-lubricant management systems |
-
2001
- 2001-03-29 JP JP2001094897A patent/JP2002295478A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011033352A (en) * | 2009-07-29 | 2011-02-17 | Kawasaki Heavy Ind Ltd | Test device for slewing ring bearing |
| WO2018005138A1 (en) * | 2016-06-26 | 2018-01-04 | Atec Corporation | Synthetic resin retainer for large thrust ball bearings with dry-lubricant and wet-lubricant management systems |
| US10054156B2 (en) | 2016-06-26 | 2018-08-21 | Atec Corporation | Synthetic resin retainer for large thrust ball bearings with dry-lubricant and wet-lubricant management systems |
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