JP2006220174A - Double row ball bearing - Google Patents

Double row ball bearing Download PDF

Info

Publication number
JP2006220174A
JP2006220174A JP2005031765A JP2005031765A JP2006220174A JP 2006220174 A JP2006220174 A JP 2006220174A JP 2005031765 A JP2005031765 A JP 2005031765A JP 2005031765 A JP2005031765 A JP 2005031765A JP 2006220174 A JP2006220174 A JP 2006220174A
Authority
JP
Japan
Prior art keywords
double row
ball bearing
outer ring
inner ring
divided
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
JP2005031765A
Other languages
Japanese (ja)
Inventor
Kazuo Akagami
和夫 赤上
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 JP2005031765A priority Critical patent/JP2006220174A/en
Publication of JP2006220174A publication Critical patent/JP2006220174A/en
Pending legal-status Critical Current

Links

Images

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
    • F16C19/18—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
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/10—Application independent of particular apparatuses related to size
    • F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
    • 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
    • F16C2316/00—Apparatus in health or amusement
    • F16C2316/10—Apparatus in health or amusement in medical appliances, e.g. in diagnosis, dentistry, instruments, prostheses, medical imaging appliances

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost double row ball bearing adaptable to high-speed specifications for achieving high precision and high rigidity while reducing the number of components. <P>SOLUTION: The double row ball bearing 10 is used for the rotation supporting part of a rotor of a CT scanner device which is rotated around an object. It comprises a plurality of balls 16 arranged between each of double row raceway grooves 12a, 12b of an outer ring 11 and each of double row raceway grooves 14a, 14b of an inner ring 13 rollingly in the peripheral direction. The outer ring 11 is divided into a plurality of members 11a, 11b in which the raceway grooves are formed as the double row raceway grooves 12a, 12b, respectively. Members having the double row raceway grooves 14a, 14b of the inner ring 13 are formed in one unit, and a fitting portion 19 is provided between the divided members 11a, 11b. The axial position of the fitting portion 19 is adjusted to control a positive or negative gap. Besides, the inner ring 13 is integrated with a shaft via one member and the outer ring 11 is integrated with a housing via one member. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、例えば産業用ロボット、工作機械、医療器械等の回転支持部に用いる複列玉軸受に関し、特に被写体の周囲を回転するＣＴスキャナ装置の回転体の回転支持部に用いるのに好適な複列玉軸受に関する。   The present invention relates to a double-row ball bearing used for a rotation support portion of, for example, an industrial robot, a machine tool, a medical instrument, and the like, and particularly suitable for use as a rotation support portion of a rotating body of a CT scanner device that rotates around a subject. It relates to double row ball bearings.

従来、ＣＴスキャナ装置の回転体の回転支持部には、組合せアンギュラ玉軸受や複列アンギュラ玉軸受の外輪をハウジングに、内輪をＸ線発生装置等を備えた回転体の回転軸に組込んだもの等が用いられている（例えば特許文献１参照）。
図３は２個の組合せアンギュラ玉軸受１の外輪２をハウジング３に、内輪４をＸ線発生装置等を備えた回転体の回転軸５に組込んだ例であり、回転軸５にはプーリ機構等により回転力が付与される。 Conventionally, in the rotation support portion of a rotating body of a CT scanner device, an outer ring of a combination angular ball bearing or a double row angular ball bearing is incorporated in a housing, and an inner ring is incorporated in a rotating shaft of a rotating body equipped with an X-ray generator or the like. The thing etc. are used (for example, refer patent document 1).
FIG. 3 shows an example in which the outer ring 2 of the two combined angular ball bearings 1 is incorporated in the housing 3 and the inner ring 4 is incorporated in the rotating shaft 5 of a rotating body equipped with an X-ray generator and the like. A rotational force is applied by a mechanism or the like.

また、回転軸５にはＸ線発生装置等を備えた回転体が装着される装着部材６がボルト７を介して取り付けられ、該装着部材６には内輪押え８が一体に形成されている。更に、ハウジング３には外輪押え９がボルト９ａ等を介して取り付けられている。
特開２００２−１３０２５９号公報 A mounting member 6 to which a rotating body equipped with an X-ray generator or the like is mounted is attached to the rotating shaft 5 via a bolt 7, and an inner ring presser 8 is integrally formed on the mounting member 6. Further, an outer ring presser 9 is attached to the housing 3 via bolts 9a and the like.
JP 2002-130259 A

ところで、ＣＴスキャン装置用の軸受には、静音化とともに、医療時間を短縮して患者の負担軽減を図ることや、心臓等の動いている臓器の撮影が可能とするため、高速仕様に対応することが要求されている。
また、組合せアンギュラ玉軸受や複列アンギュラ玉軸受等をハウジングや軸に組込んだ構造では、部品点数が多くなることから、高い精度や剛性を得るためには精密な加工による寸法管理が必要になり、コスト高になる。
本発明はこのような不都合を解消するためになされたものであり、高速仕様に対応することができると共に、部品点数を削減してコンパクト化、高精度化及び高剛性化を実現することができる複列玉軸受を低コストで提供することを目的とする。 By the way, bearings for CT scan devices are compatible with high-speed specifications to reduce noise and reduce the burden on patients by reducing medical time, and to capture moving organs such as the heart. It is requested.
In addition, in a structure in which a combination angular contact ball bearing or double row angular contact ball bearing is incorporated in a housing or shaft, the number of parts increases, so dimensional management by precise machining is required to obtain high accuracy and rigidity. The cost becomes high.
The present invention has been made to solve such inconveniences, and can cope with high-speed specifications, and can reduce the number of parts to achieve compactness, high accuracy, and high rigidity. It aims at providing a double row ball bearing at low cost.

上記目的を達成するために、請求項１に係る発明は、外輪の複列軌道溝と内輪の複列軌道溝との間に複数の玉が周方向に転動自在に配設された複列玉軸受であって、
前記外輪を複数の部材に分割して、各分割部材の内の２つの分割部材にそれぞれ軌道溝を形成することで前記複列軌道溝とすると共に、前記内輪の前記複列軌道溝を有する部材を一体とし、且つ前記分割部材に嵌め合い部を設けて、該嵌め合い部の軸方向位置を調整することで正負のすきまを調整し、更に、前記内輪を軸と一つの部材で一体化すると共に、前記外輪をハウジングと一つの部材で一体化したことを特徴とする。
請求項２に係る発明は、請求項１において、複列の玉の中心間距離Ｌと玉ピッチ円直径Ｄとの比Ｌ／Ｄを０．１以下としたことを特徴とする。
請求項３に係る発明は、請求項１又は２において、被写体の周囲を回転するＣＴスキャナ装置の回転体の回転支持部に用いることを特徴とする。 In order to achieve the above object, the invention according to claim 1 is a double row in which a plurality of balls are rotatably arranged in the circumferential direction between the double row raceway groove of the outer ring and the double row raceway groove of the inner ring. A ball bearing,
The outer ring is divided into a plurality of members, and a raceway groove is formed on each of the two divided members to form the double row raceway groove, and the member having the double row raceway groove of the inner ring , And a fitting portion is provided on the divided member, and the positive and negative clearances are adjusted by adjusting the axial position of the fitting portion, and the inner ring is integrated with the shaft by one member. In addition, the outer ring is integrated with the housing by a single member.
The invention according to claim 2 is characterized in that, in claim 1, the ratio L / D between the center-to-center distance L of the double row balls and the ball pitch circle diameter D is 0.1 or less.
According to a third aspect of the present invention, in the first or second aspect, the invention is used for a rotation support portion of a rotating body of a CT scanner device that rotates around a subject.

本発明によれば、内輪の複列軌道溝を有する部材を一体としているので２つ以上の部品を嵌め合わせたり、ボルト止めする必要がなく、玉ピッチ円径をより小さく設定することができる。
従って、通常、ｄｍｎ（ｄｍ：玉ピッチ円直径、ｎ：許容回転数）で許容値が決められている許容回転数ｎの値を玉ピッチ円直径ｄｍを小さく設定することで大きくすることができ、これにより、高速仕様に対応することができる。
また、内輪を軸と一つの部材で一体化すると共に、外輪をハウジングと一つの部材で一体化しているので、部品点数が削減されて、コンパクト化、高剛性化及び高精度化を実現することができると共に、音響や寿命にも優れた効果を発揮することができる。 According to the present invention, since the members having the double-row raceway grooves of the inner ring are integrated, it is not necessary to fit two or more parts or bolts, and the ball pitch circle diameter can be set smaller.
Accordingly, the allowable rotation speed n, which is normally determined by dmn (dm: ball pitch circle diameter, n: allowable rotation speed), can be increased by setting the ball pitch circle diameter dm small. Thus, it is possible to cope with high-speed specifications.
Also, since the inner ring is integrated with the shaft and one member, and the outer ring is integrated with the housing and one member, the number of parts is reduced, and compactness, high rigidity and high accuracy are realized. In addition, it is possible to exert excellent effects on sound and life.

以下、本発明の実施の形態の一例を図を参照して説明する。
図１は本発明の実施の形態の一例である複列玉軸受を説明するための要部断面図、図２は本発明の他の実施の形態である複列玉軸受を説明するための要部断面図である。なお、各実施の形態共に、被写体の周囲を回転するＣＴスキャナ装置の回転体の回転支持部に用いる複列玉軸受を例に採る。 Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a main part for explaining a double-row ball bearing which is an example of an embodiment of the present invention, and FIG. 2 is a main part for explaining a double-row ball bearing which is another embodiment of the present invention. FIG. In each of the embodiments, a double-row ball bearing is used as an example for a rotation support portion of a rotating body of a CT scanner device that rotates around a subject.

本発明の実施の形態の一例である複列玉軸受１０は、図１に示すように、外輪１１の複列軌道溝１２ａ，１２ｂと内輪１３の複列軌道溝１４ａ，１４ｂとの間に保持器１５を介して複数の玉１６が周方向に転動自在に配設されている。
保持器１５は、例えば樹脂製とされ、周方向に分割されたものを互いに接続して用いられる。また、外輪１１の軸方向の両端部内径面に形成された周溝１７には止め輪型の非接触シール１８が装着され、軸受空間内のグリース等の漏れを防止している。 As shown in FIG. 1, a double row ball bearing 10, which is an example of an embodiment of the present invention, is held between double row raceway grooves 12 a and 12 b of the outer ring 11 and double row raceway grooves 14 a and 14 b of the inner ring 13. A plurality of balls 16 are arranged so as to be able to roll in the circumferential direction via a vessel 15.
The cage 15 is made of, for example, resin, and is used by connecting those divided in the circumferential direction. Further, a retaining ring type non-contact seal 18 is attached to the circumferential groove 17 formed on the inner diameter surface of both end portions in the axial direction of the outer ring 11 to prevent leakage of grease or the like in the bearing space.

ここで、この実施の形態では、外輪１１を２つの部材１１ａ，１１ｂに分割して、各分割部材１１ａ，１１ｂにそれぞれ軌道溝１２ａ，１２ｂを形成することで前記複列軌道溝１２ａ．１２ｂとすると共に、内輪１３を分割することなく複列軌道溝１４ａ，１４ｂを有する部材を一体として、複列の玉１６の中心間距離Ｌと玉ピッチ円直径Ｄとの比Ｌ／Ｄを０．１以下とし、更に、内輪１３をＣＴスキャン装置のＸ線発生装置等を備えた回転体の回転軸と一つの部材で一体化すると共に、外輪１１をＣＴスキャン装置のハウジングと一つの部材で一体化している。   Here, in this embodiment, the outer ring 11 is divided into two members 11a and 11b, and raceway grooves 12a and 12b are formed in the divided members 11a and 11b, respectively, so that the double row raceway grooves 12a. 12b, and the member having the double row raceway grooves 14a and 14b without being divided into the inner ring 13, the ratio L / D between the center distance L of the double row balls 16 and the ball pitch circle diameter D is 0. .1 or less, and the inner ring 13 is integrated with a rotating shaft of a rotating body equipped with an X-ray generator of the CT scanning device and the like, and the outer ring 11 is integrated with the housing of the CT scanning device and one member. It is integrated.

分割部材１１ａ，１１ｂは互いに軸方向に嵌合される嵌め合い部１９を有しており、一方の分割部材１１ａの嵌め合い部１９の面には軸方向にねじ孔２０が形成され、他方の分割部材１１ｂにはねじ孔２０と略同心に配置されるボルト挿通孔２１が軸方向に貫通して形成されている。
そして、分割部材１１ｂのねじ挿通孔２１からボルト２２を挿入して該ボルト２２のねじ部を分割部材１１ａのねじ孔２０に螺合することにより２つの分割部材１１ａ，１１ｂが締結されて外輪１１が構成される。 The split members 11a and 11b have a fitting portion 19 that is fitted in the axial direction to each other, and a screw hole 20 is formed in the axial direction on the surface of the fitting portion 19 of the one split member 11a. A bolt insertion hole 21 disposed substantially concentrically with the screw hole 20 is formed in the split member 11b so as to penetrate in the axial direction.
Then, the bolt 22 is inserted from the screw insertion hole 21 of the split member 11b and the screw portion of the bolt 22 is screwed into the screw hole 20 of the split member 11a, whereby the two split members 11a and 11b are fastened and the outer ring 11 is fastened. Is configured.

このとき、ボルト２２の締め付け力を調整して嵌め合い部１９の軸方向位置を調整することで正負の軸受すきまを管理することができる。即ち、軸受剛性をより高める場合は、ボルト２２の締め付け力を増して負すきまとして予圧を付与することができ、或いはボルト２２による締結時に所定のすきま（正）とすることができる。
内輪１３の端面には、ＣＴスキャン装置のＸ線発生装置等を備えた回転体に連結するためのボルト孔２３が形成されている。 At this time, the positive and negative bearing clearances can be managed by adjusting the tightening force of the bolt 22 and adjusting the axial position of the fitting portion 19. That is, when the bearing rigidity is further increased, the tightening force of the bolt 22 can be increased to apply a preload as a negative clearance, or a predetermined clearance (positive) can be obtained when the bolt 22 is fastened.
Bolt holes 23 are formed on the end face of the inner ring 13 to be connected to a rotating body equipped with an X-ray generator of a CT scanning device.

このようにこの実施の形態では、内輪１３を分割することなく一体としているので２つ以上の部品を嵌め合わせたり、ボルト止めする必要がなく、玉ピッチ円直径Ｄをより小さく設定することができ、また、正負の軸受すきまの管理は、嵌め合い部１９の軸方向長さと複列軌道溝１２ａ，１２ｂの間隔を調整することで行うこともできる。
従って、通常、ｄｍｎ（ｄｍ：玉ピッチ円直径、ｎ：許容回転数）で許容値が決められている許容回転数ｎの値を玉ピッチ円直径ｄｍを小さく設定することで大きくすることができ、これにより、高速仕様に対応することができる。 Thus, in this embodiment, since the inner ring 13 is integrated without being divided, there is no need to fit two or more parts or bolts, and the ball pitch circle diameter D can be set smaller. The positive and negative bearing clearances can also be managed by adjusting the axial length of the fitting portion 19 and the distance between the double row raceway grooves 12a and 12b.
Accordingly, the allowable rotation speed n, which is normally determined by dmn (dm: ball pitch circle diameter, n: allowable rotation speed), can be increased by setting the ball pitch circle diameter dm small. Thus, it is possible to cope with high-speed specifications.

また、内輪１３を軸と一つの部材で一体化すると共に、外輪１１をハウジングと一つの部材で一体化しているので、部品点数が削減されて、コンパクト化、高剛性化及び高精度化を実現することができると共に、音響や寿命にも優れた効果を発揮することができる。 更に、軸、ハウジングの嵌め合い部の影響が少なくなるため、嵌め合いや温度変化による軸受内部すきまの変化が小さくなり、特に、軸、ハウジングが軸受と強度、線膨張係数が異なる場合に効果が大きい。   In addition, the inner ring 13 is integrated with the shaft and one member, and the outer ring 11 is integrated with the housing and one member, so the number of parts is reduced, and compactness, high rigidity and high accuracy are realized. In addition, it is possible to exert an excellent effect on sound and life. Furthermore, since the influence of the fitting part of the shaft and housing is reduced, the change in the internal clearance of the bearing due to the fitting and temperature change is reduced, especially when the shaft and housing are different from the bearing in strength and linear expansion coefficient. large.

更に、外輪１１の各分割部材１１ａ，１１ｂをＤＦ組合せ（正面組合せ）とすることにより、軸に許容されるミスアライメント（取付誤差）を大きくとることができる。
なお、本発明は上記実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲において適宜変更可能である。
例えば、上記実施の形態では、外輪１１を２つの部材１１ａ，１１ｂに分割した場合を例に採ったが、外輪１１を３つ或いはそれ以上に分割してもよい。図２は外輪１１を３つの部材１１ａ，１１ｃ，１１ｄに分割した例であり、具体的には、図１に対して、分割部材１１ｂを２つに分割して分割部材１１ｃ，１１ｄとしている。 Furthermore, by making each divided member 11a, 11b of the outer ring 11 into a DF combination (front combination), a large misalignment (mounting error) allowed for the shaft can be obtained.
In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.
For example, in the above embodiment, the case where the outer ring 11 is divided into the two members 11a and 11b is taken as an example, but the outer ring 11 may be divided into three or more. FIG. 2 shows an example in which the outer ring 11 is divided into three members 11a, 11c, and 11d. Specifically, the divided member 11b is divided into two parts as shown in FIG. 1 to form divided members 11c and 11d.

そして、分割部材１１ａ，１１ｃは互いに軸方向に嵌合される嵌め合い部３０を有し、分割部材１１ｃ，１１ｄは互いに径方向に嵌合される嵌め合い部３１を有している。
また、分割部材１１ｃには分割部材１１ａのねじ孔２０と略同心に配置されるボルト挿通孔２１が軸方向に貫通して形成されると共に、止め輪型の非接触シール１８が装着される周溝１７が形成され、分割部材１１ｄには分割部材１１ａの軌道溝１２ａと共に複列軌道溝１２ａ，１２ｂを形成する軌道溝１２ｂが形成されている。その他の構成及び作用効果については、上記実施の形態と同様である。 The divided members 11a and 11c have fitting portions 30 that are fitted in the axial direction, and the divided members 11c and 11d have fitting portions 31 that are fitted in the radial direction.
The split member 11c is formed with a bolt insertion hole 21 that is arranged substantially concentrically with the screw hole 20 of the split member 11a in the axial direction, and a periphery to which a retaining ring type non-contact seal 18 is mounted. A groove 17 is formed, and the dividing member 11d is formed with a track groove 12b that forms the double-row track grooves 12a and 12b together with the track groove 12a of the split member 11a. About another structure and an effect, it is the same as that of the said embodiment.

また、上記実施の形態では、被写体の周囲を回転するＣＴスキャナ装置の回転体の回転支持部に用いる複列玉軸受を例に採ったが、これに限定されず、ＣＴスキャン装置以外の医療器械の他、産業用ロボット、工作機械等の回転支持部に用いる複列玉軸受に本発明を適用してもよい。
その他、上記実施の形態において例示した外輪、複列軌道溝、内輪、複列軌道溝、玉、分割部材、嵌め合い部、軸、ハウジング等の材質，形状，寸法，形態，数，配置個所等は本発明を達成できるものであれば任意であり、限定されない。 In the above embodiment, the double row ball bearing used for the rotation support portion of the rotating body of the CT scanner device that rotates around the subject is taken as an example. However, the present invention is not limited to this, and a medical instrument other than the CT scan device is used. In addition, the present invention may be applied to a double row ball bearing used for a rotation support part of an industrial robot, a machine tool, or the like.
In addition, the outer ring, the double row raceway groove, the inner ring, the double row raceway groove, the ball, the split member, the fitting portion, the shaft, the housing, etc., the material, shape, dimensions, form, number, arrangement location, etc. exemplified in the above embodiment Is arbitrary as long as the present invention can be achieved, and is not limited.

本発明の実施の形態の一例である複列玉軸受を説明するための要部断面図である。It is principal part sectional drawing for demonstrating the double row ball bearing which is an example of embodiment of this invention. 本発明の他の実施の形態である複列玉軸受を説明するための要部断面図である。It is principal part sectional drawing for demonstrating the double row ball bearing which is other embodiment of this invention. 従来のＣＴスキャン装置の軸受部を示す要部断面図である。It is principal part sectional drawing which shows the bearing part of the conventional CT scan apparatus.

符号の説明Explanation of symbols

１０ 複列玉軸受
１１ 外輪
１１ａ，１１ｂ，１１ｃ，１１ｄ 分割部材
１２ａ，１２ｂ 複列軌道溝
１３ 内輪
１４ａ，１４ｂ 複列軌道溝
１６ 玉
１９，３０，３１ 嵌め合い部 DESCRIPTION OF SYMBOLS 10 Double row ball bearing 11 Outer ring | wheel 11a, 11b, 11c, 11d Dividing member 12a, 12b Double row raceway groove 13 Inner ring 14a, 14b Double row raceway groove 16 Balls 19, 30, 31 Fitting part

Claims (3)

外輪の複列軌道溝と内輪の複列軌道溝との間に複数の玉が周方向に転動自在に配設された複列玉軸受であって、
前記外輪を複数の部材に分割して、各分割部材の内の２つの分割部材にそれぞれ軌道溝を形成することで前記複列軌道溝とすると共に、前記内輪の前記複列軌道溝を有する部材を一体とし、且つ前記分割部材に嵌め合い部を設けて、該嵌め合い部の軸方向位置を調整することで正負のすきまを調整し、更に、前記内輪を軸と一つの部材で一体化すると共に、前記外輪をハウジングと一つの部材で一体化したことを特徴とする複列玉軸受。 A double row ball bearing in which a plurality of balls are arranged so as to freely roll in the circumferential direction between a double row raceway groove on the outer ring and a double row raceway groove on the inner ring,
The outer ring is divided into a plurality of members, and a raceway groove is formed on each of the two divided members to form the double row raceway groove, and the member having the double row raceway groove of the inner ring , And a fitting portion is provided on the divided member, and the positive and negative clearances are adjusted by adjusting the axial position of the fitting portion, and the inner ring is integrated with the shaft by one member. In addition, a double row ball bearing characterized in that the outer ring is integrated with the housing by a single member. 複列の玉の中心間距離Ｌと玉ピッチ円直径Ｄとの比Ｌ／Ｄを０．１以下としたことを特徴とする請求項１に記載した複列玉軸受。   2. The double row ball bearing according to claim 1, wherein a ratio L / D between the center distance L of the double row balls and the ball pitch circle diameter D is 0.1 or less. 被写体の周囲を回転するＣＴスキャナ装置の回転体の回転支持部に用いることを特徴とする請求項１又は２に記載した複列玉軸受。   The double row ball bearing according to claim 1, wherein the double row ball bearing is used for a rotation support portion of a rotating body of a CT scanner device that rotates around a subject.
JP2005031765A 2005-02-08 2005-02-08 Double row ball bearing Pending JP2006220174A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005031765A JP2006220174A (en) 2005-02-08 2005-02-08 Double row ball bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005031765A JP2006220174A (en) 2005-02-08 2005-02-08 Double row ball bearing

Publications (1)

Publication Number Publication Date
JP2006220174A true JP2006220174A (en) 2006-08-24

Family

ID=36982638

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005031765A Pending JP2006220174A (en) 2005-02-08 2005-02-08 Double row ball bearing

Country Status (1)

Country Link
JP (1) JP2006220174A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102364135A (en) * 2011-10-25 2012-02-29 洛阳Lyc轴承有限公司 Spindle bearing of CT (Computed Tomography) machine
CN105545944A (en) * 2016-03-07 2016-05-04 洛阳轴研科技股份有限公司 Large double-direction thrust ball bearing with airtightness and assembling method of large double-direction thrust ball bearing
CN106283507A (en) * 2015-05-28 2017-01-04 无锡小天鹅股份有限公司 For the outer barrel component of washing machine and the washing machine with it
CN110873123A (en) * 2019-11-25 2020-03-10 苏州溪能环保科技有限公司 Durable precision bearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102364135A (en) * 2011-10-25 2012-02-29 洛阳Lyc轴承有限公司 Spindle bearing of CT (Computed Tomography) machine
CN106283507A (en) * 2015-05-28 2017-01-04 无锡小天鹅股份有限公司 For the outer barrel component of washing machine and the washing machine with it
CN105545944A (en) * 2016-03-07 2016-05-04 洛阳轴研科技股份有限公司 Large double-direction thrust ball bearing with airtightness and assembling method of large double-direction thrust ball bearing
CN110873123A (en) * 2019-11-25 2020-03-10 苏州溪能环保科技有限公司 Durable precision bearing

Similar Documents

Publication Publication Date Title
JP2014092231A (en) Double-row rolling bearing
JP2008064248A (en) Rolling bearing cage, rolling bearing, and spindle supporting structure for wind power generator
TWI771530B (en) Cam gear
US20100269618A1 (en) Power transmission device with bevel gear
JP2006220174A (en) Double row ball bearing
JP2002081442A (en) Super thin-wall rolling bearing
WO2016043111A1 (en) Double row angular ball bearing for ct scanning device
US20100275711A1 (en) Ball screw device
JP6348203B2 (en) Double row rolling bearing
JP5704213B2 (en) Bearing device
JP2019039464A (en) Cross roller bearing
JP2006234098A (en) Bearing device
JP3141994B2 (en) Spherical bearing
JP6978188B2 (en) Multi-row combination angular contact ball bearing device
JP2010106867A (en) Bearing device and method for assembling the same
JP2012117567A (en) Bearing device
JP2022090472A (en) Bearing device with rotation sensor
JP2008240778A (en) Automatic-aligning roller bearing
JP2021122891A (en) Spindle device
JP2008039036A (en) Tripod type constant velocity joint
WO2021199873A1 (en) Roller bearing
CN215890974U (en) Speed reducer
US11313439B2 (en) Speed reducer
JP2004316777A (en) Rolling bearing
US11261910B1 (en) Multi-layer linear bearing