JP2009162277A - Bearing device - Google Patents

Bearing device Download PDF

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Publication number
JP2009162277A
JP2009162277A JP2007341087A JP2007341087A JP2009162277A JP 2009162277 A JP2009162277 A JP 2009162277A JP 2007341087 A JP2007341087 A JP 2007341087A JP 2007341087 A JP2007341087 A JP 2007341087A JP 2009162277 A JP2009162277 A JP 2009162277A
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Japan
Prior art keywords
bearing device
cylindrical member
cylindrical body
bearing
outer ring
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Pending
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JP2007341087A
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Japanese (ja)
Inventor
Mitsuru Yamazaki
充 山崎
Toshiaki Yokoyama
敏昭 横山
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Nippon Bearing Co Ltd
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Nippon Bearing Co Ltd
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Priority to JP2007341087A priority Critical patent/JP2009162277A/en
Publication of JP2009162277A publication Critical patent/JP2009162277A/en
Pending legal-status Critical Current

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    • 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
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
    • F16C19/547—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings
    • F16C19/548—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings in O-arrangement
    • 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
    • F16C25/00—Bearings for exclusively rotary movement adjustable for wear or play
    • F16C25/06—Ball or roller bearings
    • 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
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F16C43/06—Placing rolling bodies in cages or bearings
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)
  • Support Of The Bearing (AREA)
  • Bearings For Parts Moving Linearly (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a practical bearing device highly excellent in cost effectiveness and workability. <P>SOLUTION: The bearing device consists of a shaft 1; a cylindrical member 3, which is fitted to this shaft 1 via rollers; a pair of support bearing parts 4a, 4b, which are provided on the cylindrical member 3 and each comprise an inner ring part provided on the outside circumference of the cylindrical member 3 and an outer ring part arranged outside the inner ring part to support the rollers with the inner ring part; and an adjustment cylindrical member 12, whose outer cylindrical body is fitted and screwed to an inner cylindrical body provided between the pair of support bearing parts 4a, 4b. The adjustment cylindrical member 12 consists of the inner cylindrical body 8, on the outside circumferential surface of which a male thread part 9 is formed, and the outer cylindrical body 10, which is fitted to the inner cylindrical body 8 and on the inside circumferential surface of which a female thread part 11, which is screwed to the male thread part 9, is formed. It is structured to enable the outer ring parts 7a, 7b to be pressed in the direction of separating from each other and to release the pressing by adjusting the length in the axial direction by changing the screw length of the inner cylindrical body 8 and the outer one 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、ベアリング装置に関するものである。   The present invention relates to a bearing device.

工業用ロボットのアーム等に用いられる直線方向運動及び回転方向運動を案内する複合運動案内用のベアリング装置は、例えば特許文献１〜３に開示されるように、スプライン溝やボールねじ溝が形成された軸と、この軸に多数のボールを介して被嵌されるスプライン外筒やボールねじナットと、このスプライン外筒やボールねじナットの外周に設けられる一対のサポートベアリングとで構成されるのが一般的である。   As shown in, for example, Patent Documents 1 to 3, a bearing device for compound motion guidance that guides linear motion and rotational motion that is used for an arm of an industrial robot has spline grooves and ball screw grooves. And a pair of support bearings provided on the outer periphery of the spline outer cylinder and the ball screw nut. It is common.

また、上記一対のサポートベアリングは、夫々スプライン外筒等の外周に設けた内輪部と該内輪部の外側に配置され該内輪部と共にボールを保持する外輪部とから成り、前記外輪部の互いに離反する方向への移動が前記内輪部と前記ボールとにより夫々阻止されるように構成されている。   Each of the pair of support bearings includes an inner ring portion provided on the outer periphery of the spline outer cylinder and the like, and an outer ring portion that is disposed outside the inner ring portion and holds the ball together with the inner ring portion, and the outer ring portions are separated from each other. The movement in the moving direction is blocked by the inner ring portion and the ball, respectively.

ところで、この一対のサポートベアリングの外輪部は、この外輪部同士の間に配設される間座により互いに離反する方向に押圧され、その対向間隔が調整されると共に転動体への予圧が調整されている。   By the way, the outer ring portions of the pair of support bearings are pressed in directions away from each other by spacers disposed between the outer ring portions, and the facing distance is adjusted and the preload to the rolling elements is adjusted. ing.

しかしながら、上記間座はサポートベアリングの外輪部の仕上がり寸法に合わせて現場で個別に軸方向長さ寸法を調整加工する必要があり、この調整加工が厄介で部品管理も煩雑となる。   However, it is necessary to individually adjust the axial length in the field according to the finished dimensions of the outer ring portion of the support bearing, and this adjustment is troublesome and the parts management becomes complicated.

また、上記外輪部の仕上がり寸法に合わせて軸方向長さ寸法を調整したものを用いる必要がある以上、間座の組み付けは外輪部の組み付けより後で行う必要がある。即ち、間座は筒状（周方向一体形状）では組み込むことができず、従来はやむを得ず２つ割りにしたものを用い、外輪部及びボールを組み付けた後、軸方向長さ寸法を適当に調整加工して外輪部間に嵌合挿入しているが、固定されず単に外輪部により挟持された状態であるため、搬送時や組み付け時に脱落してしまう可能性がある。   In addition, as long as it is necessary to use a shaft whose length in the axial direction is adjusted in accordance with the finished dimensions of the outer ring portion, the spacer must be assembled after the outer ring portion is assembled. In other words, the spacer cannot be assembled in a cylindrical shape (integral shape in the circumferential direction). Conventionally, it was inevitable that the spacer was divided into two parts, and after the outer ring and ball were assembled, the axial length was adjusted appropriately. Although it is processed and fitted and inserted between the outer ring portions, it is not fixed and is simply sandwiched between the outer ring portions, so that it may fall off during transport or assembly.

更に、ベアリング装置をハウジングに組み込む際、間座の芯とサポートベアリングの外輪部の芯を合わせてから行う必要があり、厄介である。   Further, when the bearing device is incorporated in the housing, it is necessary to align the core of the spacer and the core of the outer ring portion of the support bearing, which is troublesome.

また、例えば特許文献４には、一対のサポートベアリングの外輪部の一方側に直接雄螺子部を設け他方側に直接雌螺子部を設けて構成される固定手段を備え、この雄螺子部と雌螺子部との螺合調整によりサポートベアリング間の隙間調整等を行う構成が開示されている。   Further, for example, Patent Document 4 includes a fixing means configured by directly providing a male screw portion on one side of the outer ring portion of the pair of support bearings and directly providing a female screw portion on the other side. The structure which adjusts the clearance gap between support bearings etc. by screwing adjustment with a screw part is disclosed.

しかしながら、この場合、荷重負荷部（ボール軌道面）と雄螺子部及び雌螺子部とが一体であるため、外輪部の部品長さが長くなり、それだけ熱処理後の変形が大きくなってしまい、その後の仕上げ加工が厄介となる。また、熱処理変形により、外輪部のボール軌道面の回転中心と固定手段（雄螺子部及び雌螺子部）の回転中心が狂ってしまい、雄螺子部及び雌螺子部の振れがボール軌道面の精度に悪影響を及ぼす可能性がある。   However, in this case, since the load application portion (ball raceway surface) and the male screw portion and the female screw portion are integrated, the part length of the outer ring portion becomes long, and the deformation after the heat treatment increases accordingly, and thereafter The finishing process becomes troublesome. Further, due to the heat treatment deformation, the rotation center of the ball raceway surface of the outer ring portion and the rotation center of the fixing means (male screw portion and female screw portion) are out of order, and the swing of the male screw portion and the female screw portion is caused by the accuracy of the ball raceway surface. May be adversely affected.

特開昭５８−１４２０２１号公報JP 58-142021 A 特開昭５８−１１３６５４号公報JP 58-113654 A 特開平１−２２９１６０号公報JP-A-1-229160 特開２００６−１７７５５０号公報JP 2006-177550 A

本発明は、上述のような現状に鑑みなされたもので、現場での調整加工が不要で部品管理が容易化し、また、外輪部と同時に組み付けることができ脱落のおそれがなく、更に、外輪部同士の間隔を調整筒状部材により容易に調整でき、しかも、熱処理変形を可及的に抑制して高精度の案内が可能となる極めてコスト性・作業性に秀れた実用的なベアリング装置を提供するものである。   The present invention has been made in view of the current situation as described above, and does not require on-site adjustment processing, facilitates component management, can be assembled at the same time as the outer ring portion, and does not fall off. A practical bearing device with excellent cost and workability that allows easy adjustment of the distance between each other with an adjustable cylindrical member, and enables high-precision guidance by suppressing heat treatment deformation as much as possible. It is to provide.

添付図面を参照して本発明の要旨を説明する。   The gist of the present invention will be described with reference to the accompanying drawings.

軸１と、この軸１に転動体を介して被嵌される筒状部材３と、この筒状部材３に設けられる一対のサポートベアリング部４ａ・４ｂと、この一対のサポートベアリング部４ａ・４ｂ同士の間に設けられる内筒体に外筒体が被嵌螺着された調整筒状部材12とから成るベアリング装置であって、前記一対のサポートベアリング部４ａ・４ｂは、夫々前記筒状部材３の外周に設けた内輪部５ａ・５ｂと該内輪部５ａ・５ｂの外側に配置され該内輪部５ａ・５ｂと共に転動体６ａ・６ｂを保持する外輪部７ａ・７ｂとから成り、前記内輪部５ａ・５ｂと前記転動体６ａ・６ｂとにより前記外輪部７ａ・７ｂの互いに離反する方向への移動は阻止されるように構成され、前記調整筒状部材12は、外周面に雄螺子部９が形成された内筒体８と、この内筒体８に被嵌せしめられ内周面に前記雄螺子部９と螺合する雌螺子部11が形成された外筒体10とから成り、また、この調整筒状部材12は、前記内筒体８と前記外筒体10との螺合長さを変更して軸方向長さを調整することで前記外輪部７ａ・７ｂの互いに離反する方向への押圧及び該押圧の解除が可能なように構成されていることを特徴とするベアリング装置に係るものである。   A shaft 1, a cylindrical member 3 fitted to the shaft 1 via a rolling element, a pair of support bearing portions 4 a and 4 b provided on the cylindrical member 3, and a pair of support bearing portions 4 a and 4 b A bearing device comprising an adjustment cylindrical member 12 in which an outer cylindrical body is fitted and screwed to an inner cylindrical body provided between the pair of support bearing portions 4a and 4b, respectively. 3 and inner ring portions 5a and 5b provided on the outer periphery of the inner ring portion 5 and outer ring portions 7a and 7b which are disposed outside the inner ring portions 5a and 5b and hold the rolling elements 6a and 6b together with the inner ring portions 5a and 5b. The outer ring portions 7a and 7b are prevented from moving away from each other by 5a and 5b and the rolling elements 6a and 6b, and the adjusting cylindrical member 12 has a male screw portion 9 on the outer peripheral surface. The inner cylinder 8 formed with the inner cylinder 8 and the inner cylinder 8 The outer cylindrical body 10 is formed with a female screw portion 11 that is fitted on the inner peripheral surface and is threadedly engaged with the male screw portion 9. The adjusting cylindrical member 12 is connected to the inner cylindrical body 8. By changing the screwing length with the outer cylindrical body 10 and adjusting the axial length, the outer ring portions 7a and 7b can be pressed away from each other and released. The present invention relates to a bearing device.

また、請求項１記載のベアリング装置において、前記調整筒状部材12の軸方向長さを最小とした場合の前記内筒体８及び前記外筒体10の軸方向長さの合算寸法Ａは、前記一対のサポートベアリング部４ａ・４ｂのうちの一方の前記内輪部５ａ・５ｂと前記外輪部７ａ・７ｂとの間に前記転動体６ａ・６ｂを配設できるような寸法に設定されていることを特徴とするベアリング装置に係るものである。   Further, in the bearing device according to claim 1, the total dimension A of the axial lengths of the inner cylindrical body 8 and the outer cylindrical body 10 when the axial length of the adjusting cylindrical member 12 is minimized is: The dimension is set such that the rolling elements 6a and 6b can be disposed between the inner ring portions 5a and 5b and the outer ring portions 7a and 7b of one of the pair of support bearing portions 4a and 4b. It concerns on the bearing apparatus characterized by these.

また、請求項１，２いずれか１項に記載のベアリング装置において、前記内筒体８と前記外筒体10との螺合長さ寸法Ｂは可及的に小さく設定されていることを特徴とするベアリング装置に係るものである。   Further, in the bearing device according to any one of claims 1 and 2, a screwing length dimension B between the inner cylindrical body 8 and the outer cylindrical body 10 is set as small as possible. This relates to the bearing device.

また、請求項３記載のベアリング装置において、前記内筒体８の前記雄螺子部９及び前記外筒体10の前記雌螺子部11は、少なくとも前記調整筒状部材12を伸長調整して前記外輪部７ａ・７ｂにより前記転動体６ａ・６ｂを前記内輪部５ａ・５ｂに押圧する際に螺合し得る範囲に形成されていることを特徴とするベアリング装置に係るものである。   4. The bearing device according to claim 3, wherein the male screw portion 9 of the inner cylindrical body 8 and the female screw portion 11 of the outer cylindrical body 10 adjust at least the adjustment cylindrical member 12 to extend and adjust the outer ring. The bearing device is characterized in that it is formed in a range that can be screwed when the rolling elements 6a and 6b are pressed against the inner ring portions 5a and 5b by the portions 7a and 7b.

また、請求項１〜４いずれか１項に記載のベアリング装置において、前記内筒体８及び前記外筒体10の外方側端部に、前記サポートベアリング部４ａ・４ｂの外輪部７ａ・７ｂに嵌合する嵌合部13が設けられていることを特徴とするベアリング装置に係るものである。   5. The bearing device according to claim 1, wherein outer ring portions 7 a and 7 b of the support bearing portions 4 a and 4 b are provided at outer end portions of the inner cylindrical body 8 and the outer cylindrical body 10. The present invention relates to a bearing device characterized in that a fitting portion 13 is provided for fitting to the bearing device.

また、請求項１〜５いずれか１項に記載のベアリング装置において、前記筒状部材３の外周壁が前記一対のサポートベアリング部４ａ・４ｂの前記内輪部５ａ・５ｂであることを特徴とするベアリング装置に係るものである。   Moreover, the bearing apparatus of any one of Claims 1-5 WHEREIN: The outer peripheral wall of the said cylindrical member 3 is the said inner ring | wheel part 5a * 5b of a pair of said support bearing part 4a * 4b, It is characterized by the above-mentioned. This relates to a bearing device.

また、請求項１〜６いずれか１項記載のベアリング装置において、前記サポートベアリング部４ａ・４ｂとしてアンギュラベアリングが採用されていることを特徴とするベアリング装置に係るものである。   The bearing device according to any one of claims 1 to 6, wherein an angular bearing is employed as the support bearing portions 4a and 4b.

また、請求項７記載のベアリング装置において、前記アンギュラベアリングは背面同士が対向する向きで設けられていることを特徴とするベアリング装置に係るものである。   The bearing device according to claim 7, wherein the angular bearing is provided in a direction in which the back surfaces face each other.

また、請求項１〜８いずれか１項に記載のベアリング装置において、前記調整筒状部材12には該調整筒状部材12の軸方向長さを調整した後、前記内筒体８の前記雄螺子部９と前記外筒体10の前記雌螺子部11とが螺動不能となるように固定する止め螺子14が設けられていることを特徴とするベアリング装置に係るものである。   9. The bearing device according to claim 1, wherein after the axial length of the adjusting cylindrical member 12 is adjusted, the male member of the inner cylindrical body 8 is adjusted to the adjusting cylindrical member 12. The bearing device is characterized in that a set screw 14 is provided for fixing the screw portion 9 and the female screw portion 11 of the outer cylindrical body 10 so that the screw portion 9 cannot be screwed.

また、請求項１〜８いずれか１項に記載のベアリング装置において、前記内筒体８と前記外筒体10は前記調整筒状部材12の軸方向長さを調整した後、前記内筒体８の前記雄螺子部９と前記外筒体10の前記雌螺子部11とが螺動不能となるように接着剤により固定されていることを特徴とするベアリング装置に係るものである。   9. The bearing device according to claim 1, wherein the inner cylinder body 8 and the outer cylinder body 10 adjust the axial length of the adjustment cylindrical member 12, and then the inner cylinder body. 8, the male screw portion 9 and the female screw portion 11 of the outer cylindrical body 10 are fixed by an adhesive so as not to be screwed.

また、請求項１〜１０いずれか１項に記載のベアリング装置において、前記軸１にはスプライン溝15が形成され、前記筒状部材３としてスプライン用外筒３ａが採用され、このスプライン用外筒３ａに前記一対のサポートベアリング部４ａ・４ｂが設けられていることを特徴とするベアリング装置に係るものである。   11. The bearing device according to claim 1, wherein a spline groove 15 is formed in the shaft 1, and a spline outer cylinder 3 a is adopted as the cylindrical member 3, and the spline outer cylinder is adopted. The bearing device is characterized in that the pair of support bearing portions 4a and 4b are provided on 3a.

また、請求項１〜１０いずれか１項に記載のベアリング装置において、前記軸１にはボールねじ溝16が形成され、前記筒状部材３としてボールねじナット３ｂが採用され、このボールねじナット３ｂに前記一対のサポートベアリング部４ａ・４ｂが設けられていることを特徴とするベアリング装置に係るものである。   Further, in the bearing device according to any one of claims 1 to 10, a ball screw groove 16 is formed in the shaft 1, and a ball screw nut 3b is adopted as the cylindrical member 3, and the ball screw nut 3b. The bearing device is characterized in that the pair of support bearing portions 4a and 4b are provided.

また、請求項１〜１０いずれか１項に記載のベアリング装置において、前記軸１にはスプライン溝15とボールねじ溝16とが形成され、前記筒状部材３としてスプライン用外筒３ａとボールねじナット３ｂとが採用され、このスプライン用外筒３ａ及びボールねじナット３ｂに夫々前記一対のサポートベアリング部４ａ・４ｂが設けられていることを特徴とするベアリング装置に係るものである。   11. The bearing device according to claim 1, wherein a spline groove 15 and a ball screw groove 16 are formed on the shaft 1, and the spline outer cylinder 3 a and a ball screw are formed as the cylindrical member 3. A nut 3b is employed, and the pair of support bearing portions 4a and 4b are provided on the spline outer cylinder 3a and the ball screw nut 3b, respectively.

また、請求項１〜１０いずれか１項に記載のベアリング装置において、前記軸１として丸軸が採用され、前記筒状部材３としてスライドブッシュ用外筒が採用され、このスライドブッシュ用外筒に前記一対のサポートベアリング部４ａ・４ｂが設けられていることを特徴とするベアリング装置に係るものである。   Further, in the bearing device according to claim 1, a round shaft is adopted as the shaft 1, and an outer cylinder for a slide bush is adopted as the cylindrical member 3. The pair of support bearing portions 4a and 4b are provided, and the present invention relates to a bearing device.

本発明は上述のように構成したから、現場での調整加工が不要で部品管理が容易化し、また、外輪部と同時に組み付けることができ脱落のおそれがなく、更に、外輪部同士の間隔を調整筒状部材により容易に調整でき、しかも、熱処理変形を可及的に抑制して高精度の案内が可能となる極めてコスト性・作業性に秀れた実用的なベアリング装置となる。   Since the present invention is configured as described above, on-site adjustment processing is not required, parts management is facilitated, and it can be assembled at the same time as the outer ring part, and there is no risk of falling off. Further, the interval between the outer ring parts is adjusted. This is a practical bearing device that can be easily adjusted by the cylindrical member, and that is highly cost-effective and easy to work with, and that enables high-accuracy guidance by suppressing heat treatment deformation as much as possible.

好適と考える本発明の実施形態を、図面に基づいて本発明の作用を示して簡単に説明する。   An embodiment of the present invention which is considered to be suitable will be briefly described with reference to the drawings showing the operation of the present invention.

調整筒状部材12の内筒体８の雄螺子部９と外筒体10の雌螺子部11とを螺動調整して調整筒状部材12の軸方向長さを伸長調整することで、外輪部７ａ・７ｂを互いに離反する方向へ押圧して外輪部７ａ・７ｂ同士の間隔及び外輪部７ａ・７ｂと内輪部５ａ・５ｂとによる転動体６ａ・６ｂへの予圧を調整することが可能となる。   By adjusting the extension of the axial length of the adjusting cylindrical member 12 by adjusting the male screw portion 9 of the inner cylindrical body 8 of the adjusting cylindrical member 12 and the female screw portion 11 of the outer cylindrical body 10 to adjust the outer ring It is possible to adjust the distance between the outer ring portions 7a and 7b and the preload on the rolling elements 6a and 6b by the outer ring portions 7a and 7b and the inner ring portions 5a and 5b by pressing the portions 7a and 7b away from each other. Become.

また、調整筒状部材12の軸方向長さを短縮調整することで、離反する方向への押圧が解除されて外輪部７ａ・７ｂの互いに近接する方向への移動が許容され、この外輪部７ａ・７ｂと内輪部５ａ・５ｂとの間に転動体６ａ・６ｂを配設することが可能となる。   Further, by adjusting the axial length of the adjusting cylindrical member 12 to be shortened, the pressing in the separating direction is released, and the outer ring portions 7a and 7b are allowed to move in directions close to each other, and the outer ring portion 7a is allowed to move. It becomes possible to arrange the rolling elements 6a and 6b between the 7b and the inner ring portions 5a and 5b.

従って、調整筒状部材12を外輪部７ａ・７ｂ間に後付けする必要なく、外輪部７ａ・７ｂと共に筒状部材３ａ・３ｂに組み付け、短縮調整して転動体６ａ・６ｂを夫々の外輪部７ａ・７ｂと内輪部５ａ・５ｂとの間に配設した後、伸長調整して外輪部７ａ・７ｂを互いに離反する方向に押圧して適宜な位置に調整することが可能で、また、更に転動体６ａ・６ｂへの予圧を調整することも容易となる。   Therefore, it is not necessary to retrofit the adjusting cylindrical member 12 between the outer ring portions 7a and 7b. The outer ring portions 7a and 7b are assembled to the cylindrical members 3a and 3b together with the outer ring portions 7a and 7b, and shortened to adjust the rolling elements 6a and 6b.・ After being arranged between 7b and inner ring part 5a, 5b, it is possible to adjust the extension by adjusting the extension and pressing outer ring part 7a, 7b away from each other. It is also easy to adjust the preload on the moving bodies 6a and 6b.

また、調整筒状部材12と外輪部７ａ・７ｂとは別体であるため、熱処理変形を可及的に抑制することができ、加工が容易でより高精度のベアリング装置となる。   In addition, since the adjusting cylindrical member 12 and the outer ring portions 7a and 7b are separate bodies, heat treatment deformation can be suppressed as much as possible, and the processing becomes easy and a highly accurate bearing device is obtained.

本発明の具体的な実施例について図面に基づいて説明する。   Specific embodiments of the present invention will be described with reference to the drawings.

本実施例は、軸１と、この軸１に転動体を介して被嵌される筒状部材３と、この筒状部材３に設けられる一対のサポートベアリング部４ａ・４ｂと、この一対のサポートベアリング部４ａ・４ｂ同士の間に設けられる内筒体に外筒体が被嵌螺着された調整筒状部材12とから成るベアリング装置であって、前記一対のサポートベアリング部４ａ・４ｂは、夫々前記筒状部材３の外周に設けた内輪部５ａ・５ｂと該内輪部５ａ・５ｂの外側に配置され該内輪部５ａ・５ｂと共に転動体６ａ・６ｂを保持する外輪部７ａ・７ｂとから成り、前記内輪部５ａ・５ｂと前記転動体６ａ・６ｂとにより前記外輪部７ａ・７ｂの互いに離反する方向への移動は阻止されるように構成され、前記調整筒状部材12は、外周面に雄螺子部９が形成された内筒体８と、この内筒体８に被嵌せしめられ内周面に前記雄螺子部９と螺合する雌螺子部11が形成された外筒体10とから成り、また、この調整筒状部材12は、前記内筒体８と前記外筒体10との螺合長さを変更して軸方向長さを調整することで前記外輪部７ａ・７ｂの互いに離反する方向への押圧及び該押圧の解除が可能なように構成されているものである。   In this embodiment, the shaft 1, the cylindrical member 3 fitted to the shaft 1 via a rolling element, the pair of support bearing portions 4a and 4b provided on the cylindrical member 3, and the pair of supports A bearing device comprising an adjustment cylindrical member 12 in which an outer cylinder is fitted and screwed to an inner cylinder provided between the bearing parts 4a and 4b, wherein the pair of support bearing parts 4a and 4b are: The inner ring portions 5a and 5b provided on the outer periphery of the tubular member 3, respectively, and the outer ring portions 7a and 7b that are disposed outside the inner ring portions 5a and 5b and hold the rolling elements 6a and 6b together with the inner ring portions 5a and 5b. And the inner ring portions 5a and 5b and the rolling elements 6a and 6b are configured to prevent the outer ring portions 7a and 7b from moving in directions away from each other. An inner cylindrical body 8 having a male screw portion 9 formed thereon, The inner cylindrical body 8 is formed of an outer cylindrical body 10 formed with a female threaded portion 11 screwed to the male threaded portion 9 on the inner peripheral surface thereof. By changing the screwing length between the inner cylinder body 8 and the outer cylinder body 10 and adjusting the axial length, the outer ring portions 7a and 7b can be pressed and released from each other. It is comprised as follows.

具体的には、図１に図示したように、軸１にはスプライン溝15とボールねじ溝16とが形成され、筒状部材３として公知のスプライン用外筒３ａ（軸１と対向する内面に転動体保持器を設けこの転動体保持器に負荷路と無負荷路とリターン路とから成る転動体無限循環路を設けて転動体を循環させる構成）と公知のボールねじナット３ｂ（ボールねじ溝16と対応する螺旋溝が内周面に形成され、ボールねじ溝16と螺旋溝との間に転動体を設ける構成）とが採用され、このスプライン用外筒３ａ及びボールねじナット３ｂに夫々前記一対のサポートベアリング部４ａ・４ｂが設けられている。   Specifically, as shown in FIG. 1, a spline groove 15 and a ball screw groove 16 are formed on the shaft 1, and a known spline outer cylinder 3 a (on the inner surface facing the shaft 1) as a cylindrical member 3. A rolling element holder is provided and the rolling element holder is provided with a rolling element infinite circulation path composed of a load path, a no-load path and a return path to circulate the rolling element, and a known ball screw nut 3b (ball screw groove) 16 is formed on the inner peripheral surface, and a rolling element is provided between the ball screw groove 16 and the spiral groove). The spline outer cylinder 3a and the ball screw nut 3b are respectively provided with the above-described configuration. A pair of support bearing portions 4a and 4b are provided.

尚、スプライン用外筒３ａ及びボールねじナット３ｂに設けられるサポートベアリング部４ａ・４ｂ及び調整筒状部材12は同構造であるため、本実施例においてはボールねじナット３ｂ側について説明する。また、本実施例は、スプライン構造とボールねじ構造の双方を備えた構成であるが、いずれか一方のみを備えた構成でも同様である。また、軸１として丸軸（スプライン溝等がない軸）を採用し、筒状部材３としてスライドブッシュ用外筒（軸１と対向する内面に転動体保持器を設けこの転動体保持器に負荷路と無負荷路とリターン路とから成る転動体無限循環路を設けて転動体を循環させる構成）を採用して該スライドブッシュ用外筒に前記一対のサポートベアリング部４ａ・４ｂを設ける構成としても良い。   Since the support bearing portions 4a and 4b and the adjusting cylindrical member 12 provided on the spline outer cylinder 3a and the ball screw nut 3b have the same structure, only the ball screw nut 3b side will be described in this embodiment. In addition, although the present embodiment has a configuration including both a spline structure and a ball screw structure, the configuration including only one of them is also the same. Further, a round shaft (a shaft without spline grooves or the like) is adopted as the shaft 1, and an outer cylinder for a slide bush is provided as the cylindrical member 3 (a rolling element cage is provided on the inner surface facing the shaft 1). A configuration in which a rolling element infinite circulation path including a path, a no-load path, and a return path is provided to circulate the rolling element), and the pair of support bearing portions 4a and 4b are provided in the slide bush outer cylinder. Also good.

各部を具体的に説明する。   Each part will be specifically described.

ボールねじナット３ｂは、平坦な中央部に端部側が段階的に径大となる径大端部が連設された構成であり、この径大端部にサポートベアリング部４ａ・４ｂが設けられている。   The ball screw nut 3b has a configuration in which a large-diameter end portion having a gradually increasing diameter on the end side is connected to a flat central portion, and support bearing portions 4a and 4b are provided at the large-diameter end portion. Yes.

具体的には、ボールねじナット３ｂの径大端部の外周壁の一部にぐるりと内輪部５ａ・５ｂが設けられている。更に具体的に説明すると、径大端部の段差面上にやや斜め内方を向くように転動体６ａ・６ｂと略合致する湾曲円弧状の凹条18ａ・18ｂが設けられ、この凹条18ａ・18ｂが転動体６ａ・６ｂを受ける内輪部５ａ・５ｂとなるように構成されている。   Specifically, inner ring portions 5a and 5b are provided around a part of the outer peripheral wall of the large diameter end portion of the ball screw nut 3b. More specifically, curved arc-shaped concave strips 18a and 18b that substantially coincide with the rolling elements 6a and 6b are provided on the step surface of the large-diameter end portion so as to face slightly inward, and this concave strip 18a. -18b is comprised so that it may become the inner ring | wheel part 5a * 5b which receives the rolling elements 6a * 6b.

内輪部５ａ・５ｂの外側（外周側）には、転動体６ａ・６ｂを介して外輪部７ａ・７ｂが配置される。この外輪部７ａ・７ｂは、内輪部５ａ・５ｂの凹条18ａ・18ｂに保持された転動体６ａ・６ｂにより、互いに離反する方向への移動が阻止される。   Outer ring portions 7a and 7b are arranged on the outer side (outer peripheral side) of the inner ring portions 5a and 5b via rolling elements 6a and 6b. The outer ring portions 7a and 7b are prevented from moving in directions away from each other by the rolling elements 6a and 6b held by the recesses 18a and 18b of the inner ring portions 5a and 5b.

具体的には、外輪部７ａ・７ｂは、筒状で内面に前記凹条18ａ・18ｂと対向する湾曲円弧状の保持面17ａ・17ｂが形成されたものであり、この保持面17ａ・17ｂと凹条18ａ・18ｂとで転動体６ａ・６ｂを適度な予圧で挟持する。図中、符号19は給油用の給油孔、符号20は外輪部７ａの外方側端部に形成された鍔部に設けられたハウジング等を取り付けるための取り付け螺子が挿通される挿通孔、21ａ・21ｂは転動体６ａ・６ｂ同士の間隔を保持するスペーサ、22は塵埃の進入を阻止するシール部材である。   Specifically, the outer ring portions 7a and 7b have a cylindrical shape and curved arc-shaped holding surfaces 17a and 17b facing the concave strips 18a and 18b on the inner surface. The holding surfaces 17a and 17b The rolling elements 6a and 6b are clamped with an appropriate preload by the recesses 18a and 18b. In the figure, reference numeral 19 is an oil supply hole for oil supply, reference numeral 20 is an insertion hole through which a mounting screw for attaching a housing or the like provided on a flange formed at the outer end of the outer ring portion 7a is inserted, 21a Reference numeral 21b denotes a spacer for maintaining the space between the rolling elements 6a and 6b, and reference numeral 22 denotes a seal member for preventing dust from entering.

尚、本実施例においては前記サポートベアリング部４ａ・４ｂとしてアンギュラベアリングが採用されている。このアンギュラベアリングは背面同士が対向する向き（荷重接触先方向が側面視ハ字状となる向き、所謂ＤＢ構造）で設けられている。従って、外輪部７ａ・７ｂが互いに離反する方向に移動して内輪部５ａ・５ｂに近接する程転動体６ａ・６ｂの予圧は大きくなる。   In this embodiment, angular bearings are employed as the support bearing portions 4a and 4b. This angular bearing is provided in a direction in which the back surfaces face each other (a direction in which the load contact direction is a letter C in a side view, so-called DB structure). Therefore, the preload of the rolling elements 6a and 6b increases as the outer ring portions 7a and 7b move away from each other and approach the inner ring portions 5a and 5b.

外輪部７ａ・７ｂの間には、図３に図示したように、調整筒状部材12が設けられている。調整筒状部材12は、内筒体８と外筒体10とを雄螺子部９と雌螺子部11とで螺合一体化することで構成されている。従って、雄螺子部９と雌螺子部11との螺合状態を変化させることで軸方向長さを調整することができる。   As shown in FIG. 3, an adjusting cylindrical member 12 is provided between the outer ring portions 7a and 7b. The adjustment cylindrical member 12 is configured by screwing and integrating the inner cylindrical body 8 and the outer cylindrical body 10 with the male screw portion 9 and the female screw portion 11. Therefore, the axial length can be adjusted by changing the screwed state of the male screw portion 9 and the female screw portion 11.

また、内筒体８の外方側端部には、外筒体10の外周面と略面一状となる頂面を有する凸条部23が設けられている。従って、例えばこの凸条部23の頂面を掴んで内筒体８と対向する外輪部７ａ側に引き寄せ固定した状態で外筒体10を回動せしめて雄螺子部９と雌螺子部11との螺合状態と変化せしめることで良好に外輪部７ａ・７ｂ間の間隔の調整等を行えることになる。   Further, a protruding strip portion 23 having a top surface that is substantially flush with the outer peripheral surface of the outer cylindrical body 10 is provided at an outer side end portion of the inner cylindrical body 8. Therefore, for example, the outer cylindrical body 10 is rotated in a state where the top surface of the ridge 23 is grasped and pulled and fixed to the outer ring portion 7a facing the inner cylindrical body 8, and the male screw portion 9 and the female screw portion 11 are connected. It is possible to satisfactorily adjust the distance between the outer ring portions 7a and 7b by changing the screwed state to the above.

また、内筒体８と外筒体10との螺合長さ寸法Ｂは可及的に小さく設定されている。具体的には、内筒体８の雄螺子部９及び外筒体10の雌螺子部11は、少なくとも調整筒状部材12を伸長調整して外輪部７ａ・７ｂにより転動体６ａ・６ｂを内輪部５ａ・５ｂに押圧する際（予圧調整する際）に螺合し得る範囲に形成されている。   Further, the screwing length dimension B between the inner cylinder 8 and the outer cylinder 10 is set as small as possible. Specifically, the male screw portion 9 of the inner cylinder body 8 and the female screw portion 11 of the outer cylinder body 10 extend and adjust at least the adjustment cylindrical member 12 so that the rolling elements 6a and 6b are connected to the inner ring by the outer ring portions 7a and 7b. It is formed in a range that can be screwed when pressed against the portions 5a and 5b (when adjusting the preload).

本実施例においては、内筒体８の雄螺子部９及び外筒体10の雌螺子部11は、内筒体８及び外筒体10の対向端部の所定範囲（略同一寸法Ｂ）にのみ夫々形成されている。従って、雄螺子部９と雌螺子部11との螺合長さ寸法Ｂは雄螺子部９及び雌螺子部11の形成長さ寸法と略同じとなる。この寸法Ｂは、内筒体８及び外筒体10の重合度合い調整可能寸法Ｃに比し小さい寸法に設定されている。即ち、雄螺子部９と雌螺子部11とが螺合する前の状態（螺合解除状態）において、重合度合い調整可能寸法Ｃのうち、Ｃ−Ｂの領域では内筒体８と外筒体10とはスライド移動により重合度合いを調整して軸方向長さを調整でき、残余の領域（螺合領域）では螺動調整により重合度合いを調整して軸方向長さを調整できるように構成されている。   In the present embodiment, the male screw portion 9 of the inner cylindrical body 8 and the female screw portion 11 of the outer cylindrical body 10 are within a predetermined range (substantially the same dimension B) of the opposed end portions of the inner cylindrical body 8 and the outer cylindrical body 10. Only each is formed. Accordingly, the threaded length dimension B of the male screw part 9 and the female screw part 11 is substantially the same as the formation length dimension of the male screw part 9 and the female screw part 11. This dimension B is set to be smaller than the dimension C capable of adjusting the degree of polymerization of the inner cylinder 8 and the outer cylinder 10. That is, in a state before the male screw portion 9 and the female screw portion 11 are screwed together (screwing released state), the inner cylinder body 8 and the outer cylinder body in the region C-B in the dimension C of the degree of polymerization adjustable. 10 is configured such that the degree of polymerization can be adjusted by adjusting the degree of polymerization by sliding movement, and the length in the axial direction can be adjusted by adjusting the degree of polymerization by adjusting the screw in the remaining area (screwing area). ing.

これは、調整筒状部材12の軸方向長さ寸法の調整は、短縮調整を行う場合には、後述するように転動体６ａ・６ｂの配設が行えれば良くそれ程精度を必要としないため、螺合を解除して単に内筒体８と外筒体10とをスライド移動させて調整を行う方が容易であり、螺動による無段階調整は、外輪部７ａ・７ｂと内輪部５ａ・５ｂとが夫々転動体６ａ・６ｂに接触する伸長調整最終段階（予圧調整段階）で行えれば充分だからである。   This is because the adjustment of the length in the axial direction of the adjustment cylindrical member 12 does not require so much accuracy if the rolling elements 6a and 6b can be arranged as will be described later when the shortening adjustment is performed. It is easier to perform adjustment by releasing the screwing and simply sliding the inner cylinder 8 and the outer cylinder 10, and the stepless adjustment by screwing is performed by the outer ring portions 7a and 7b and the inner ring portions 5a and 5a. This is because it is sufficient to be able to carry out at the final adjustment stage (preload adjustment stage) of contact with the rolling elements 6a and 6b.

また、本実施例においては、調整筒状部材12の軸方向長さを短縮調整することで、前記一対のサポートベアリング部４ａ・４ｂのうちの一方の内輪部５ａ・５ｂと外輪部７ａ・７ｂとの間に転動体６ａ・６ｂを配設できるように調整筒状部材12の最小軸方向長さ寸法が設定されている。即ち、内筒体８と外筒体10との軸方向長さを最小とした場合の内筒体８及び外筒体10の軸方向長さの合算寸法Ａ（内筒体８及び外筒体10の重合部分の軸方向長さ＋非重合部分の軸方向長さ）は、前記一対のサポートベアリング部４ａ・４ｂのうちの一方の内輪部５ａ・５ｂと外輪部７ａ・７ｂとの間に転動体６ａ・６ｂを配設できるような寸法に設定されている。   In the present embodiment, the inner ring portions 5a and 5b and the outer ring portions 7a and 7b of the pair of support bearing portions 4a and 4b are adjusted by shortening and adjusting the axial length of the adjustment cylindrical member 12. The minimum length in the axial direction of the adjusting cylindrical member 12 is set so that the rolling elements 6a and 6b can be disposed between the two. That is, the total dimension A (the inner cylinder 8 and the outer cylinder) of the axial lengths of the inner cylinder 8 and the outer cylinder 10 when the axial lengths of the inner cylinder 8 and the outer cylinder 10 are minimized. The axial length of 10 overlapping portions + the axial length of non-overlapping portions) is between the inner ring portions 5a and 5b and the outer ring portions 7a and 7b of the pair of support bearing portions 4a and 4b. The dimensions are set such that the rolling elements 6a and 6b can be disposed.

具体的には、図４，５に図示したように、外輪部７ａ・７ｂ及び調整筒状部材12を一方側に寄せた状態で、他方側の内輪部５ａ・５ｂと外輪部７ａ・７ｂとの隙間から転動体６ａ・６ｂが挿通し得る寸法に設定されている。   Specifically, as shown in FIGS. 4 and 5, with the outer ring portions 7a and 7b and the adjustment tubular member 12 being moved to one side, the inner ring portions 5a and 5b and the outer ring portions 7a and 7b on the other side The dimension is set such that the rolling elements 6a and 6b can be inserted through the gap.

従って、本実施例は、以下のようにしてサポートベアリング部４ａ・４ｂ及び調整筒状部材12をボールねじナット３ｂの外周に配設することができる。   Accordingly, in the present embodiment, the support bearing portions 4a and 4b and the adjusting cylindrical member 12 can be disposed on the outer periphery of the ball screw nut 3b as follows.

図２に図示したように外輪部７ａ、調整筒状部材12（重合させた状態でも別体でもよい）、外輪部７ｂを順次ボールねじナット３ｂに被嵌せしめ、調整筒状部材12の軸方向長さ寸法が最小となるように短縮調整して、図４に図示したように図４中左側に外輪部７ａ・７ｂ及び調整筒状部材12を寄せ、図４中右側から内輪部５ａと外輪部７ａとの間に転動体６ａを導入する（スペーサ21の孔に配設せしめる）。   As shown in FIG. 2, the outer ring portion 7a, the adjusting cylindrical member 12 (which may be superposed or separate), and the outer ring portion 7b are sequentially fitted on the ball screw nut 3b, and the axial direction of the adjusting cylindrical member 12 As shown in FIG. 4, the outer ring portions 7a and 7b and the adjusting cylindrical member 12 are brought closer to the left side in FIG. 4, and the inner ring portion 5a and the outer ring are moved from the right side in FIG. The rolling elements 6a are introduced between the portions 7a (arranged in the holes of the spacers 21).

続いて、同様に図５に図示したように図５中右側に外輪部７ａ・７ｂ及び調整筒状部材12を寄せ、図５中左側から内輪部５ｂと外輪部７ｂとの間に転動体６ｂを導入する。   Subsequently, as shown in FIG. 5, the outer ring portions 7a and 7b and the adjusting cylindrical member 12 are brought to the right side in FIG. 5, and the rolling elements 6b are arranged between the inner ring portion 5b and the outer ring portion 7b from the left side in FIG. Is introduced.

続いて、図６に図示したように、調整筒状部材12の内筒体８と外筒体10とを伸長調整（螺合しない範囲でスライド移動後、螺合範囲で螺動調整）して調整筒状部材12による外輪部７ａ・７ｂと内輪部５ａ・５ｂとによる転動体６ａ・６ｂの挟持圧力（予圧）を調整することで配設完了となる。   Subsequently, as illustrated in FIG. 6, the inner cylindrical body 8 and the outer cylindrical body 10 of the adjustment cylindrical member 12 are adjusted to be extended (sliding movement within a range not screwed and then screwed within the screwing range). The arrangement is completed by adjusting the clamping pressure (preload) of the rolling elements 6a and 6b by the outer ring portions 7a and 7b and the inner ring portions 5a and 5b by the adjusting cylindrical member 12.

尚、スペーサ21ａ・21ｂは外輪部７ａ・７ｂ及び調整筒状部材12と同時に配設しても良いし、後から配設しても良い。また、一体のリング状のものでも良いし分割リング状のものでも良い。   The spacers 21a and 21b may be disposed simultaneously with the outer ring portions 7a and 7b and the adjusting cylindrical member 12, or may be disposed later. Moreover, an integral ring shape may be sufficient and a division | segmentation ring shape may be sufficient.

また、内筒体８及び外筒体10の外方側端部に、外輪部７ａ・７ｂに嵌合する嵌合部13が設けられている。具体的には、内筒体８及び外筒体10の（対向端部と反対側の）外方側端部に外輪部７ａ・７ｂの開口端部内周面と嵌合する嵌合凸条13が設けられている。従って、上述のように外輪部７ａ・７ｂと共にボールねじナット３ｂに被嵌した際、この嵌合部13を外輪部７ａ・７ｂの開口端部に挿入するだけで位置決めでき、芯ズレを生じさせることなく調整筒状部材12による隙間調整が可能となる。また、ハウジングに組み込む際の調整筒状部材12と外輪部７ａ・７ｂとの芯を合わせる手間を省くことが可能となる。   Further, a fitting portion 13 that is fitted to the outer ring portions 7a and 7b is provided at the outer end portions of the inner cylindrical body 8 and the outer cylindrical body 10. Specifically, the fitting ridges 13 fitted to the inner peripheral surfaces of the outer end portions of the outer ring portions 7a and 7b at the outer side end portions (on the opposite side to the opposite end portions) of the inner cylindrical body 8 and the outer cylindrical body 10. Is provided. Therefore, as described above, when fitted to the ball screw nut 3b together with the outer ring portions 7a and 7b, the fitting portion 13 can be positioned only by being inserted into the open end portions of the outer ring portions 7a and 7b, thereby causing a misalignment. Without any adjustment, the adjustment tubular member 12 can be used to adjust the gap. In addition, it is possible to save the trouble of aligning the cores of the adjusting cylindrical member 12 and the outer ring portions 7a and 7b when assembled in the housing.

また、調整筒状部材12には該調整筒状部材12の軸方向長さを調整した後、内筒体８の雄螺子部９と外筒体10の雌螺子部11とが螺動不能となるように固定する止め螺子14が設けられている。従って、上述のようにして調整筒状部材12を外輪部７ａ・７ｂが適宜な位置となるように伸長調整した後、この止め螺子14によって雄螺子部９と雌螺子部11とが螺動不能となるように固定することで、螺子の緩みをより確実に阻止できることになる。   In addition, after adjusting the axial length of the adjustment cylindrical member 12 to the adjustment cylindrical member 12, the male screw portion 9 of the inner cylinder body 8 and the female screw portion 11 of the outer cylinder body 10 cannot be screwed. A set screw 14 is provided for fixing the screw. Therefore, after adjusting and adjusting the adjusting cylindrical member 12 so that the outer ring portions 7a and 7b are at appropriate positions as described above, the male screw portion 9 and the female screw portion 11 cannot be screwed by the set screw 14. By fixing so as to become, it becomes possible to more reliably prevent the screw from loosening.

尚、止め螺子に限らず、例えば、調整筒状部材12の軸方向長さを調整した後、内筒体８の雄螺子部９と外筒体10の雌螺子部11とが螺動不能となるように接着剤により固定しても良い。   Not only the set screw but also, for example, after adjusting the axial length of the adjusting cylindrical member 12, the male screw portion 9 of the inner cylindrical body 8 and the female screw portion 11 of the outer cylindrical body 10 cannot be screwed. It may be fixed with an adhesive.

また、転動体６ａ・６ｂへの予圧の調整は、調整筒状部材12を徐々に螺動せしめてガタが無くなったところを基準として更に所定角度回転させ決められた予圧を与えることで行っても良いし、サポートベアリングが回転するトルクを測定しつつ、規定のトルクに達するまで調整筒状部材を螺動せしめて調整しても良い。予圧をトルクで管理する場合には、より適切な予圧量を与えることができる。   Further, the adjustment of the preload to the rolling elements 6a and 6b can be performed by gradually screwing the adjustment cylindrical member 12 and rotating it a predetermined angle with respect to the position where the play is eliminated to give the determined preload. Alternatively, the adjustment cylindrical member may be adjusted by screwing until the specified torque is reached while measuring the torque with which the support bearing rotates. When the preload is managed by torque, a more appropriate amount of preload can be given.

本実施例は上述のように構成したから、調整筒状部材12の内筒体８の雄螺子部９と外筒体10の雌螺子部11とを螺動調整して調整筒状部材12の軸方向長さを伸長調整することで、外輪部７ａ・７ｂを互いに離反する方向へ押圧して外輪部７ａ・７ｂ同士の間隔及び外輪部７ａ・７ｂと内輪部５ａ・５ｂとによる転動体６ａ・６ｂへの予圧を調整することが可能となる。   Since the present embodiment is configured as described above, the male screw portion 9 of the inner cylindrical body 8 of the adjustment cylindrical member 12 and the female screw portion 11 of the outer cylindrical body 10 are screw-adjusted to adjust the adjustment cylindrical member 12. By adjusting the length in the axial direction, the outer ring portions 7a and 7b are pressed in directions away from each other, the distance between the outer ring portions 7a and 7b, and the rolling element 6a by the outer ring portions 7a and 7b and the inner ring portions 5a and 5b. -The preload to 6b can be adjusted.

また、調整筒状部材12の軸方向長さを短縮調整することで、離反する方向への押圧が解除されて外輪部７ａ・７ｂの互いに近接する方向への移動が許容され、この外輪部７ａ・７ｂと内輪部５ａ・５ｂとの間に転動体６ａ・６ｂを配設することが可能となる。   Further, by adjusting the axial length of the adjusting cylindrical member 12 to be shortened, the pressing in the separating direction is released, and the outer ring portions 7a and 7b are allowed to move in directions close to each other, and the outer ring portion 7a is allowed to move. It becomes possible to arrange the rolling elements 6a and 6b between the 7b and the inner ring portions 5a and 5b.

従って、調整筒状部材12を外輪部７ａ・７ｂ間に後付けする必要なく、外輪部７ａ・７ｂと共に筒状部材３ａ・３ｂに組み付け、短縮調整して転動体６ａ・６ｂを夫々の外輪部７ａ・７ｂと内輪部５ａ・５ｂとの間に配設した後、伸長調整して外輪部７ａ・７ｂを互いに離反する方向に押圧して適宜な位置に調整することが可能で、また、更に転動体６ａ・６ｂへの予圧を調整することも容易となる。   Therefore, it is not necessary to retrofit the adjusting cylindrical member 12 between the outer ring portions 7a and 7b. The outer ring portions 7a and 7b are assembled to the cylindrical members 3a and 3b together with the outer ring portions 7a and 7b, and shortened to adjust the rolling elements 6a and 6b.・ After being arranged between 7b and inner ring part 5a, 5b, it is possible to adjust the extension by adjusting the extension and pressing outer ring part 7a, 7b away from each other. It is also easy to adjust the preload on the moving bodies 6a and 6b.

また、調整筒状部材12と外輪部７ａ・７ｂとは別体であるため、熱処理変形を可及的に抑制することができ、加工が容易でより高精度のベアリング装置となる。   In addition, since the adjusting cylindrical member 12 and the outer ring portions 7a and 7b are separate bodies, heat treatment deformation can be suppressed as much as possible, and the processing becomes easy and a highly accurate bearing device is obtained.

よって、本実施例は、現場での調整加工が不要でコスト削減が可能で且つ部品管理が容易化し、また、外輪部と同時に組み付けることができ脱落のおそれがなく、更に、外輪部同士の間隔を調整筒状部材により容易に調整でき、しかも、熱処理変形を可及的に抑制して高精度の案内が可能となる極めてコスト性・作業性に秀れた実用的なベアリング装置となる。   Therefore, in this embodiment, on-site adjustment processing is unnecessary, cost reduction is possible, parts management is facilitated, and there is no risk of dropping off because it can be assembled at the same time as the outer ring portion. Can be easily adjusted by the adjusting cylindrical member, and it becomes a practical bearing device excellent in cost and workability that enables highly accurate guidance by suppressing heat treatment deformation as much as possible.

本実施例の概略説明斜視図である。It is a schematic explanatory perspective view of a present Example. 本実施例の拡大概略説明分解斜視図である。It is an expansion outline explanation exploded perspective view of a present Example. 本実施例の一部を切り欠いた拡大概略説明斜視図である。It is an expansion outline explanation perspective view which notched a part of this example. 本実施例の組み付け手順を説明する概略説明断面図である。It is general | schematic explanatory sectional drawing explaining the assembly | attachment procedure of a present Example. 本実施例の組み付け手順を説明する概略説明断面図である。It is general | schematic explanatory sectional drawing explaining the assembly | attachment procedure of a present Example. 本実施例の組み付け手順を説明する概略説明断面図である。It is general | schematic explanatory sectional drawing explaining the assembly | attachment procedure of a present Example.

符号の説明Explanation of symbols

１ 軸
３ 筒状部材
３ａ スプライン用外筒
３ｂ ボールねじナット
４ａ・４ｂ サポートベアリング部
５ａ・５ｂ 内輪部
６ａ・６ｂ 転動体
７ａ・７ｂ 外輪部
８ 内筒体
９ 雄螺子部
10 外筒体
11 雌螺子部
12 調整筒状部材
13 嵌合部
14 止め螺子
15 スプライン溝
16 ボールねじ溝
Ａ 合算寸法
Ｂ 螺合長さ寸法 DESCRIPTION OF SYMBOLS 1 axis | shaft 3 cylindrical member 3a outer cylinder for splines 3b ball screw nut 4a and 4b support bearing part 5a and 5b inner ring part 6a and 6b rolling element 7a and 7b outer ring part 8 inner cylinder body 9 male screw part
10 Outer cylinder
11 Female thread
12 Adjusting cylindrical member
13 Mating part
14 Set screw
15 Spline groove
16 Ball screw groove A Total dimension B Threaded length dimension

Claims (14)

軸と、この軸に転動体を介して被嵌される筒状部材と、この筒状部材に設けられる一対のサポートベアリング部と、この一対のサポートベアリング部同士の間に設けられる内筒体に外筒体が被嵌螺着された調整筒状部材とから成るベアリング装置であって、前記一対のサポートベアリング部は、夫々前記筒状部材の外周に設けた内輪部と該内輪部の外側に配置され該内輪部と共に転動体を保持する外輪部とから成り、前記内輪部と前記転動体とにより前記外輪部の互いに離反する方向への移動は阻止されるように構成され、前記調整筒状部材は、外周面に雄螺子部が形成された内筒体と、この内筒体に被嵌せしめられ内周面に前記雄螺子部と螺合する雌螺子部が形成された外筒体とから成り、また、この調整筒状部材は、前記内筒体と前記外筒体との螺合長さを変更して軸方向長さを調整することで前記外輪部の互いに離反する方向への押圧及び該押圧の解除が可能なように構成されていることを特徴とするベアリング装置。   A shaft, a cylindrical member fitted to the shaft via a rolling element, a pair of support bearing portions provided on the cylindrical member, and an inner cylinder provided between the pair of support bearing portions A bearing device comprising an adjustment cylindrical member to which an outer cylindrical body is fitted and screwed, wherein the pair of support bearing portions are respectively provided on an outer ring portion provided on an outer periphery of the cylindrical member and on an outer side of the inner ring portion. An outer ring portion that is disposed and holds a rolling element together with the inner ring portion, and is configured such that movement of the outer ring portion in a direction away from each other is prevented by the inner ring portion and the rolling element, and the adjustment cylindrical shape The member includes an inner cylinder having a male screw part formed on the outer peripheral surface, and an outer cylinder having a female screw part fitted on the inner cylinder and screwed to the male screw part on the inner peripheral surface. The adjusting cylindrical member is composed of the inner cylindrical body and the outer cylindrical body. By changing the screwing length with the body and adjusting the axial length, the outer ring portion can be pressed in a direction away from each other, and the pressing can be released. Bearing device. 請求項１記載のベアリング装置において、前記調整筒状部材の軸方向長さを最小とした場合の前記内筒体及び前記外筒体の軸方向長さの合算寸法は、前記一対のサポートベアリング部のうちの一方の前記内輪部と前記外輪部との間に前記転動体を配設できるような寸法に設定されていることを特徴とするベアリング装置。   2. The bearing device according to claim 1, wherein a total dimension of the axial lengths of the inner cylindrical body and the outer cylindrical body when the axial length of the adjusting cylindrical member is minimized is the pair of support bearing portions. The bearing device is characterized in that the size is set such that the rolling element can be disposed between the inner ring portion and the outer ring portion. 請求項１，２いずれか１項に記載のベアリング装置において、前記内筒体と前記外筒体との螺合長さ寸法は可及的に小さく設定されていることを特徴とするベアリング装置。   The bearing device according to claim 1, wherein a screwing length dimension between the inner cylindrical body and the outer cylindrical body is set as small as possible. 請求項３記載のベアリング装置において、前記内筒体の前記雄螺子部及び前記外筒体の前記雌螺子部は、少なくとも前記調整筒状部材を伸長調整して前記外輪部により前記転動体を前記内輪部に押圧する際に螺合し得る範囲に形成されていることを特徴とするベアリング装置。   4. The bearing device according to claim 3, wherein the male screw portion of the inner cylindrical body and the female screw portion of the outer cylindrical body are configured to adjust at least the adjustment cylindrical member so that the rolling element is moved by the outer ring portion. A bearing device, wherein the bearing device is formed in a range that can be screwed when pressed against the inner ring portion. 請求項１〜４いずれか１項に記載のベアリング装置において、前記内筒体及び前記外筒体の外方側端部に、前記サポートベアリング部の外輪部に嵌合する嵌合部が設けられていることを特徴とするベアリング装置。   5. The bearing device according to claim 1, wherein a fitting portion that is fitted to an outer ring portion of the support bearing portion is provided at an outer side end portion of the inner cylinder body and the outer cylinder body. Bearing device characterized by that. 請求項１〜５いずれか１項に記載のベアリング装置において、前記筒状部材の外周壁が前記一対のサポートベアリング部の前記内輪部であることを特徴とするベアリング装置。   The bearing device according to any one of claims 1 to 5, wherein an outer peripheral wall of the cylindrical member is the inner ring portion of the pair of support bearing portions. 請求項１〜６いずれか１項記載のベアリング装置において、前記サポートベアリング部としてアンギュラベアリングが採用されていることを特徴とするベアリング装置。   The bearing device according to claim 1, wherein an angular bearing is employed as the support bearing portion. 請求項７記載のベアリング装置において、前記アンギュラベアリングは背面同士が対向する向きで設けられていることを特徴とするベアリング装置。   The bearing device according to claim 7, wherein the angular bearing is provided in a direction in which the back surfaces face each other. 請求項１〜８いずれか１項に記載のベアリング装置において、前記調整筒状部材には該調整筒状部材の軸方向長さを調整した後、前記内筒体の前記雄螺子部と前記外筒体の前記雌螺子部とが螺動不能となるように固定する止め螺子が設けられていることを特徴とするベアリング装置。   9. The bearing device according to claim 1, wherein after the axial length of the adjustment cylindrical member is adjusted to the adjustment cylindrical member, the male screw portion and the outer portion of the inner cylindrical body are adjusted. A bearing device characterized in that a set screw for fixing the female screw portion of the cylindrical body so as to be unscrewable is provided. 請求項１〜８いずれか１項に記載のベアリング装置において、前記内筒体と前記外筒体は前記調整筒状部材の軸方向長さを調整した後、前記内筒体の前記雄螺子部と前記外筒体の前記雌螺子部とが螺動不能となるように接着剤により固定されていることを特徴とするベアリング装置。   9. The bearing device according to claim 1, wherein the inner cylindrical body and the outer cylindrical body adjust the axial length of the adjusting cylindrical member, and then the male screw portion of the inner cylindrical body. And the female screw portion of the outer cylinder body are fixed by an adhesive so that they cannot be screwed. 請求項１〜１０いずれか１項に記載のベアリング装置において、前記軸にはスプライン溝が形成され、前記筒状部材としてスプライン用外筒が採用され、このスプライン用外筒に前記一対のサポートベアリング部が設けられていることを特徴とするベアリング装置。   11. The bearing device according to claim 1, wherein a spline groove is formed in the shaft, and a spline outer cylinder is employed as the cylindrical member, and the pair of support bearings is disposed on the spline outer cylinder. A bearing device comprising a portion. 請求項１〜１０いずれか１項に記載のベアリング装置において、前記軸にはボールねじ溝が形成され、前記筒状部材としてボールねじナットが採用され、このボールねじナットに前記一対のサポートベアリング部が設けられていることを特徴とするベアリング装置。   11. The bearing device according to claim 1, wherein a ball screw groove is formed in the shaft, and a ball screw nut is employed as the cylindrical member, and the pair of support bearing portions is provided on the ball screw nut. A bearing device is provided. 請求項１〜１０いずれか１項に記載のベアリング装置において、前記軸にはスプライン溝とボールねじ溝とが形成され、前記筒状部材としてスプライン用外筒とボールねじナットとが採用され、このスプライン用外筒及びボールねじナットに夫々前記一対のサポートベアリング部が設けられていることを特徴とするベアリング装置。   11. The bearing device according to claim 1, wherein a spline groove and a ball screw groove are formed on the shaft, and a spline outer cylinder and a ball screw nut are employed as the cylindrical member. A bearing device, wherein the pair of support bearing portions are provided on the spline outer cylinder and the ball screw nut, respectively. 請求項１〜１０いずれか１項に記載のベアリング装置において、前記軸として丸軸が採用され、前記筒状部材としてスライドブッシュ用外筒が採用され、このスライドブッシュ用外筒に前記一対のサポートベアリング部が設けられていることを特徴とするベアリング装置。   11. The bearing device according to claim 1, wherein a round shaft is employed as the shaft, and an outer cylinder for a slide bush is employed as the cylindrical member, and the pair of supports is disposed on the outer cylinder for the slide bush. A bearing device comprising a bearing portion.
JP2007341087A 2007-12-28 2007-12-28 Bearing device Pending JP2009162277A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103495971A (en) * 2013-06-06 2014-01-08 合肥工业大学 Five degree-of-freedom combined robot platform
WO2015197304A1 (en) * 2014-06-25 2015-12-30 Continental Automotive Gmbh Bearing device for a shaft, in particular of a turbocharger device
CN107165934A (en) * 2017-07-17 2017-09-15 安徽利达汽车轴承制造有限公司 A kind of combination bearing
CN111075849A (en) * 2019-12-30 2020-04-28 浙江德清富源智能装备科技有限公司 Full-automatic ball bearing assembly production line

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103495971A (en) * 2013-06-06 2014-01-08 合肥工业大学 Five degree-of-freedom combined robot platform
WO2015197304A1 (en) * 2014-06-25 2015-12-30 Continental Automotive Gmbh Bearing device for a shaft, in particular of a turbocharger device
CN106460942A (en) * 2014-06-25 2017-02-22 大陆汽车有限公司 Bearing device for a shaft, in particular of a turbocharger device
US10107330B2 (en) 2014-06-25 2018-10-23 Continental Automotive Gmbh Bearing device for a shaft, in particular of a turbocharger device
CN107165934A (en) * 2017-07-17 2017-09-15 安徽利达汽车轴承制造有限公司 A kind of combination bearing
CN111075849A (en) * 2019-12-30 2020-04-28 浙江德清富源智能装备科技有限公司 Full-automatic ball bearing assembly production line

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