JPH0514631U - Dynamic pressure air bearing - Google Patents
Dynamic pressure air bearingInfo
- Publication number
- JPH0514631U JPH0514631U JP8820391U JP8820391U JPH0514631U JP H0514631 U JPH0514631 U JP H0514631U JP 8820391 U JP8820391 U JP 8820391U JP 8820391 U JP8820391 U JP 8820391U JP H0514631 U JPH0514631 U JP H0514631U
- Authority
- JP
- Japan
- Prior art keywords
- dynamic pressure
- air bearing
- sleeve
- pressure air
- herringbone grooves
- 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
Landscapes
- Mechanical Optical Scanning Systems (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
(57)【要約】
【目的】 加工精度のばらつき等によって動圧空気軸受
の空気吸い込みが損なわれることを防ぎ、軸受剛性の低
減を防止する。
【構成】 外周に複数のヘリングボーン溝d,e,f,
gを設けた動圧軸1にスリーブ2を遊嵌して構成される
動圧空気軸受において、空気吸い込み口h,i側のヘリ
ンクボーン溝d,gの溝終端j,kのそれぞれがスリー
ブ2の端面2a,2bより外側となるように配設したも
のである。
(57) [Summary] [Purpose] To prevent the air suction of the dynamic pressure air bearing from being impaired due to variations in machining accuracy, etc., and to prevent the reduction in bearing rigidity. [Structure] A plurality of herringbone grooves d, e, f, on the outer circumference
In a dynamic pressure air bearing configured by loosely fitting a sleeve 2 on a dynamic pressure shaft 1 provided with g, each of the groove ends j and k of the herringbone grooves d and g on the air suction port h and i side is a sleeve. The two end surfaces 2a and 2b are arranged outside.
Description
【0001】[0001]
本考案は、情報機器、画像機器、計測機器に用いられる動圧空気軸受型光偏向 器を構成する動圧空気軸受に関するものである。 The present invention relates to a dynamic pressure air bearing which constitutes a dynamic pressure air bearing type optical deflector used in information equipment, image equipment and measuring equipment.
【0002】[0002]
従来の動圧空気軸受の一例の構造と作用を図3で説明する。動圧軸3の外周表 面には、互いに反対向きの吸入角の動圧発生用のヘリングボーン溝da,ea, fa,gaが設けてある。スリーブ2が回転するとき、動圧軸3とスリーブ2と の間の隙間Pに動圧が発生し、この動圧により軸受剛性が生ずる。 The structure and operation of an example of a conventional dynamic pressure air bearing will be described with reference to FIG. Herringbone grooves da, ea, fa, ga for generating dynamic pressure having suction angles opposite to each other are provided on the outer peripheral surface of the dynamic pressure shaft 3. When the sleeve 2 rotates, dynamic pressure is generated in the gap P between the dynamic pressure shaft 3 and the sleeve 2, and this dynamic pressure causes bearing rigidity.
【0003】 この構造ではヘリングボーン溝da、ea、fa、gaの長さはすべて等しく 、スリーブ2の端面2a,2bとヘリングボーン溝da及びgaの空気吸い込み 口h,i側の溝端が設計上一致していた。In this structure, the lengths of the herringbone grooves da, ea, fa and ga are all equal, and the end faces 2a and 2b of the sleeve 2 and the groove ends of the herringbone grooves da and ga on the air suction ports h and i sides are designed. It was a match.
【0004】[0004]
前記従来の動圧空気軸受では、加工精度のばらつき等の原因によりヘリングボ ーン溝da及びgaの空気吸い込み口h,i側の溝端がスリーブ2の端面2aま たは端面2bよりも内側になってしまい、空気吸い込みが損なわれて求める軸受 剛性が得られない場合が生じていた。 In the conventional dynamic pressure air bearing, the groove ends of the herringbone grooves da and ga on the side of the air suction ports h and i are located inside the end surface 2a or the end surface 2b of the sleeve 2 due to variations in processing accuracy. In some cases, the air intake was impaired and the required bearing rigidity could not be obtained.
【0005】[0005]
本考案は、前記課題を解決するためになされたもので、実施例に対応する図1 ,図2で説明すると、本考案による動圧空気軸受は、外周に複数のヘリングボー ン溝d,e,f,gを設けた動圧軸1にスリーブ2を遊嵌して構成される動圧空 気軸受において、空気吸い込み口h,i側のヘリングボーン溝d,gの溝終端j ,kがそれぞれスリーブ2の端面l,mより外側となるように配設したものであ る。 The present invention has been made to solve the above-mentioned problems, and will be described with reference to FIGS. 1 and 2 corresponding to the embodiments. A dynamic air bearing according to the present invention has a plurality of herringbone grooves d, e, In a dynamic pressure air bearing configured by loosely fitting a sleeve 2 on a dynamic pressure shaft 1 provided with f and g, groove ends j 1 and k of herringbone grooves d and g on the air suction port h and i sides are respectively sleeves. It is arranged so as to be outside the end faces 1 and m of No. 2.
【0006】[0006]
本考案は、動圧空気軸受において、空気吸い込み口h,i側のヘリングボーン 溝d,gの溝終端j,kをあらかじめスリーブ2の端面より外側となるように配 設にすることによって、加工精度のばらつき等が従来のようにある場合にも空気 吸い込みを損なわれることなく、軸受剛性の低減を防ぐことができる。 In the present invention, in the dynamic pressure air bearing, the herringbone grooves d, g on the side of the air suction ports h, i are arranged so that the groove ends j, k are located outside the end surface of the sleeve 2 in advance. Even if there is a variation in accuracy as in the past, it is possible to prevent reduction in bearing rigidity without impairing air suction.
【0007】[0007]
以下、図面を参照して本考案の実施例について説明する。図2は本考案による 動圧空気軸受によって構成される動圧空気軸受型光偏向器の断面図である。動圧 軸1はモーターケース14に焼きばめ等で隙間なく固着されている。また、動圧 軸1とカバー4もOリング11を介して隙間なく固着されており、さらにカバー 4とモーターケース14もOリング12を介して隙間なく固着されている。ここ でヨーク9、コイル8・・、ホール素子10、マグネット13から構成されるモ ーター部を駆動すると、マグネット13に固着された中空円筒形のスリーブ2が 回転し、さらにスリーブ2に固着されたハブ6にねじ7で固着された回転多面鏡 5が回転する。このとき、動圧空気軸受を構成する動圧軸1とスリーブ2との隙 間Pに動圧が発生し、この動圧により軸受剛性が生ずる。 Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a sectional view of a dynamic air bearing type optical deflector constructed by a dynamic pressure air bearing according to the present invention. The dynamic pressure shaft 1 is firmly fixed to the motor case 14 by shrink fitting or the like. Further, the dynamic pressure shaft 1 and the cover 4 are firmly fixed to each other via the O-ring 11, and the cover 4 and the motor case 14 are also tightly fixed to each other via the O-ring 12. When the motor portion composed of the yoke 9, coil 8, ..., Hall element 10, and magnet 13 is driven, the hollow cylindrical sleeve 2 fixed to the magnet 13 rotates and is further fixed to the sleeve 2. The rotary polygon mirror 5 fixed to the hub 6 with screws 7 rotates. At this time, a dynamic pressure is generated in a gap P between the dynamic pressure shaft 1 and the sleeve 2 which form the dynamic pressure air bearing, and the dynamic pressure causes bearing rigidity.
【0008】 このときの動圧空気軸受の構造を図1で説明する。図1は本考案による動圧空 気軸受の一実施例の構造図で、動圧軸1にはヘリングボーン溝d、e、f,gが 設けられており、このうち空気吸い込み口側のヘリングボーン溝d及びgの溝終 端j,kはスリーブ2の端面2a,2bよりもそれぞれ1mmづつ外側となって いる。 よって加工精度のばらつき等により、ヘリングボーン溝d及びgやスリーブ2 の寸法に誤差が生じた場合にもスリーブ2の回転による隙間Pへの空気吸い込み が損なわれず、求める軸受剛性を得ることができる。The structure of the dynamic pressure air bearing at this time will be described with reference to FIG. FIG. 1 is a structural diagram of an embodiment of a dynamic pressure air bearing according to the present invention, in which the dynamic pressure shaft 1 is provided with herringbone grooves d, e, f, g, of which the herringbone on the air intake side. The groove ends j and k of the grooves d and g are located 1 mm outside the end surfaces 2a and 2b of the sleeve 2, respectively. Therefore, even if an error occurs in the dimensions of the herringbone grooves d and g or the sleeve 2 due to variations in processing accuracy, air suction into the gap P due to the rotation of the sleeve 2 is not impaired, and the required bearing rigidity can be obtained. ..
【0009】[0009]
【考案の効果】 以上詳細に説明したように本考案によれば、動圧空気軸受の空気吸い込み口側 ヘリングボーン溝の端をスリーブ端面より外側にすることによって空気吸い込み が損なわれず、軸受剛性の低減を防ぐことができる。さらに、動圧軸のヘリング ボーン溝の寸法に余裕があるため、許される範囲内で寸法の異なるスリーブを組 み合わせ、同一の動圧軸を用いて性能の異なる動圧空気軸受を構成することもで きる。As described in detail above, according to the present invention, by making the end of the herringbone groove on the air intake port side of the dynamic pressure air bearing outside the sleeve end surface, the air intake is not impaired and the bearing rigidity is improved. Reduction can be prevented. In addition, since there is a margin in the dimension of the herringbone groove of the dynamic pressure shaft, sleeves with different dimensions should be combined within the allowable range to form dynamic pressure air bearings with different performance using the same dynamic pressure shaft. I can do it.
【図1】本考案による動圧空気軸受の一実施例の構造
図。FIG. 1 is a structural diagram of an embodiment of a dynamic pressure air bearing according to the present invention.
【図2】本考案による動圧空気軸受型光偏向器の一実施
例の断面図。FIG. 2 is a sectional view of an embodiment of a dynamic pressure air bearing type optical deflector according to the present invention.
【図3】従来の動圧空気軸受の外観図。FIG. 3 is an external view of a conventional dynamic pressure air bearing.
1,3 動圧軸 2 スリーブ 2a,2b スリーブ 4 カバー 5 回転多面鏡 6 ハブ 7 ねじ 8 コイル 9 ヨーク 10 ホール素
子 11,12 Oリング 13 マグネッ
ト 14 モーターケース d,e,f,g,da,ea,fa,ga ヘリング
ボーン溝 h,i 空気吸い込み口 j,k 溝終端 P 隙間1,3 Dynamic pressure shaft 2 Sleeves 2a, 2b Sleeve 4 Cover 5 Rotating polygon mirror 6 Hub 7 Screw 8 Coil 9 Yoke 10 Hall element 11, 12 O-ring 13 Magnet 14 Motor case d, e, f, g, da, ea , Fa, ga Herringbone groove h, i Air suction port j, k Groove end P Gap
フロントページの続き (72)考案者 三浦 壮之 埼玉県入間市新久下新田110−1コパル電 子株式会社入間事業所内 (72)考案者 中吉 宏 埼玉県入間市新久下新田110−1コパル電 子株式会社入間事業所内Front page continuation (72) Inventor Takeyuki Miura 110-1 Shinkushitaita, Iruma-shi, Saitama Copal Electronics Co., Ltd. Iruma Office (72) Author Hiroshi Nakayoshi 110, Shinkushita, Iruma-shi, Saitama 1 Inside the Copal Electronics Co., Ltd. Iruma Office
Claims (1)
(e),(f),(g)を設けた動圧軸(1)にスリー
ブ(2)を遊嵌して構成される動圧空気軸受において、
空気吸い込み口(h),(i)側のヘリングボーン溝
(d),(g)の溝終端(j),(k)のそれぞれがス
リーブ2の端面(2a),(2b)より外側となるよう
に配設したことを特徴とする動圧空気軸受。1. A plurality of herringbone grooves (d) on the outer circumference,
In a dynamic pressure air bearing configured by loosely fitting a sleeve (2) on a dynamic pressure shaft (1) provided with (e), (f) and (g),
Each of the herringbone grooves (d) on the side of the air suction port (h), (i), and the groove ends (j) and (k) of the (g) are outside the end faces (2a) and (2b) of the sleeve 2. A dynamic pressure air bearing characterized in that it is arranged as described above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8820391U JPH0514631U (en) | 1991-08-02 | 1991-08-02 | Dynamic pressure air bearing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8820391U JPH0514631U (en) | 1991-08-02 | 1991-08-02 | Dynamic pressure air bearing |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0514631U true JPH0514631U (en) | 1993-02-26 |
Family
ID=13936346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8820391U Pending JPH0514631U (en) | 1991-08-02 | 1991-08-02 | Dynamic pressure air bearing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0514631U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002070842A (en) * | 2000-08-28 | 2002-03-08 | Matsushita Electric Ind Co Ltd | Fluid bearing apparatus |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6388314A (en) * | 1986-09-30 | 1988-04-19 | Toshiba Corp | Dynamic pressure air bearing |
-
1991
- 1991-08-02 JP JP8820391U patent/JPH0514631U/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6388314A (en) * | 1986-09-30 | 1988-04-19 | Toshiba Corp | Dynamic pressure air bearing |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002070842A (en) * | 2000-08-28 | 2002-03-08 | Matsushita Electric Ind Co Ltd | Fluid bearing apparatus |
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