JPH0620968Y2 - Rotary encoder - Google Patents

Rotary encoder

Info

Publication number
JPH0620968Y2
JPH0620968Y2 JP1988030630U JP3063088U JPH0620968Y2 JP H0620968 Y2 JPH0620968 Y2 JP H0620968Y2 JP 1988030630 U JP1988030630 U JP 1988030630U JP 3063088 U JP3063088 U JP 3063088U JP H0620968 Y2 JPH0620968 Y2 JP H0620968Y2
Authority
JP
Japan
Prior art keywords
rotary shaft
rotary
housing
rotating shaft
shaft
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.)
Expired - Lifetime
Application number
JP1988030630U
Other languages
Japanese (ja)
Other versions
JPH01134214U (en
Inventor
孝 鈴木
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.)
Eagle Industry Co Ltd
Original Assignee
Eagle Industry Co 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 Eagle Industry Co Ltd filed Critical Eagle Industry Co Ltd
Priority to JP1988030630U priority Critical patent/JPH0620968Y2/en
Publication of JPH01134214U publication Critical patent/JPH01134214U/ja
Application granted granted Critical
Publication of JPH0620968Y2 publication Critical patent/JPH0620968Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0406—Magnetic bearings
    • F16C32/0408—Passive magnetic bearings
    • F16C32/0423—Passive magnetic bearings with permanent magnets on both parts repelling each other
    • F16C32/0425—Passive magnetic bearings with permanent magnets on both parts repelling each other for radial load mainly
    • 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
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
    • F16C32/0402—Bearings not otherwise provided for using magnetic or electric supporting means combined with other supporting means, e.g. hybrid bearings with both magnetic and fluid supporting means

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Description

【考案の詳細な説明】 〔産業上の利用分野〕 この考案はロータリエンコーダに関し、特に空気流で回
転軸を支持して高速性、耐久性を向上させたロータリエ
ンコーダに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a rotary encoder, and more particularly to a rotary encoder that supports a rotary shaft with an air flow to improve high speed and durability.

〔従来の技術および解決しようとする課題〕[Conventional technology and problems to be solved]

従来のロータリエンコーダにあっては、第３図に示すよ
うにハウジング１１内に回転軸１４の径より大径の孔１
２を設け、この孔１２内に一対の軸受け１３、１３を介
して前記回転軸１４を回転可能に配設し、この回転軸１
４の一端に支承部１５を介して回転ディスク１６を取付
け、そして、回転軸１４の回転時に、これと一体に回転
する前記回転ディスク１６を、それに隣接して配設され
たセンサ１７で検出して、回転量を知るようになってい
る。In the conventional rotary encoder, as shown in FIG. 3, a hole 1 having a diameter larger than that of the rotary shaft 14 is provided in the housing 11.
2 is provided, and the rotary shaft 14 is rotatably disposed in the hole 12 via a pair of bearings 13, 13.
4, a rotary disk 16 is attached to one end of the rotary shaft 14 via a support portion 15, and when the rotary shaft 14 rotates, the rotary disk 16 that rotates integrally with the rotary shaft 14 is detected by a sensor 17 disposed adjacent to the rotary disk 16. To know the amount of rotation.

しかし、上記のように構成した場合、前記回転軸１４
は、軸受１３で支持されているので、回転軸１４が高速
で矢印方向に回転した際に、軸受１３との接触面が発熱
したり、軸受１３が損傷したりすることがあり、特に、
高速回転時に回転軸の軸心、すなわち、回転ディスクの
軸心が振れたりして、高速回転の維持、あるいは、長期
の使用に耐えるのが難しいという問題点があった。However, in the case of the above configuration, the rotating shaft 14
Is supported by the bearing 13, so that when the rotating shaft 14 rotates at high speed in the direction of the arrow, the contact surface with the bearing 13 may generate heat or the bearing 13 may be damaged.
There has been a problem that it is difficult to maintain high-speed rotation or endure long-term use because the shaft center of the rotating shaft, that is, the shaft center of the rotating disk, sways during high-speed rotation.

この考案は、上記のような従来のもののもつ問題点を解
決したものであって、回転軸を空気層で支持するように
したことにより、回転軸からの摩擦による発熱や、保持
部の損傷等を未然に防止するとともに、回転時にハウジ
ングに対して回転軸がずれるのを防止して、高速回転の
維持、あるいは長期の使用に耐えることのできるロータ
リエンコーダを提供することを目的とする。This invention solves the above-mentioned problems with the conventional ones, and by supporting the rotary shaft with an air layer, heat generation due to friction from the rotary shaft, damage to the holding portion, etc. It is an object of the present invention to provide a rotary encoder which can prevent the rotation axis from being displaced with respect to the housing during rotation, and can maintain high-speed rotation or endure long-term use.

〔課題を解決するための手段〕[Means for Solving the Problems]

この考案は上記の目的を達成するために、ハウジング
に、一端に回転ディスクが設けられた回転軸を回転可能
に配設するとともに、前記回転軸の回転量を、前記回転
ディスクに隣接して配設されたセンサで検知するように
したロータリエンコーダにおいて、前記回転軸の中央部
に、上下面がテーパ面となる膨出部を形成するととも
に、この膨出部に対応する前記ハウジングの部分にテー
パ部を形成し、さらに前記膨出部の上下面のテーパ面
に、回転軸の回転方向と反対方向に順次深くなる溝を複
数穿設し、前記回転軸の回転時に前記溝による空気流が
ハウジングのテーパ面に吹き付けるようにして回転軸を
支持し、さらに前記回転軸の一部の外周面およびここに
対向する前記ハウジングの内周面をともに同極にして磁
力が反発するようにした手段を採用したものである。In order to achieve the above object, the present invention rotatably disposes a rotary shaft having a rotary disc at one end in a housing, and disposes a rotation amount of the rotary shaft adjacent to the rotary disc. In a rotary encoder configured to detect with a sensor provided, a bulging portion whose upper and lower surfaces are tapered surfaces is formed in the central portion of the rotating shaft, and a taper is formed on a portion of the housing corresponding to the bulging portion. A plurality of grooves are formed in the taper surfaces of the upper and lower surfaces of the bulging portion, and the air flow due to the grooves when the rotating shaft rotates is formed in the housing. The rotating shaft is supported by being sprayed on the tapered surface of the rotating shaft, and the outer peripheral surface of a part of the rotating shaft and the inner peripheral surface of the housing facing the rotating shaft are made to have the same polarity to repel the magnetic force. It is those which adopted the stage.

〔作用〕[Action]

この考案は上記のような手段を採用したことにより、回
転軸の膨出部は空気流によって支持されるので実質的に
ハウジングと非接触な状態で支持でき、これによって回
転時の発熱等を防止でき、しかも、回転軸が常に磁力に
よって中央に付勢されているので高速回転時にも回転が
振れる恐れがなくて長期の高速回転の維持に耐え得るこ
とができることとなる。According to the present invention, by adopting the above-mentioned means, the bulging portion of the rotary shaft is supported by the air flow, so that it can be supported substantially in a non-contact state with the housing, thereby preventing heat generation during rotation. Moreover, since the rotating shaft is always biased to the center by the magnetic force, there is no fear that the rotation will be shaken even at the time of high speed rotation, and it is possible to endure the maintenance of high speed rotation for a long period of time.

〔実施例〕〔Example〕

以下図面に示すこの考案の実施例について説明する。 An embodiment of the present invention shown in the drawings will be described below.

第１図および第２図(a)(b)にはこの考案によるロータリ
エンコーダが示されており、一端に回転ディスク８を取
り付けた回転軸６の中央部に上下面がテーパ面となって
いる膨出部７を設け、この膨出部７の上下面のテーパ面
に第２図(a)(b)で示すように断面楔状の溝７ａを回転軸
６の回転方向に対して反対方向に行くに従って順次深く
なるように形成する。1 and 2 (a) (b) show a rotary encoder according to the present invention, in which the upper and lower surfaces are tapered at the center of a rotary shaft 6 having a rotary disk 8 attached to one end. A bulging portion 7 is provided, and a groove 7a having a wedge-shaped cross section is formed in the taper surface of the upper and lower surfaces of the bulging portion 7 in the direction opposite to the rotating direction of the rotating shaft 6, as shown in FIGS. 2 (a) and 2 (b). It is formed so that it gradually becomes deeper as it goes.

そして、前記回転軸６を収納するハウジング１は、回転
軸６が挿通し得る孔５の開口部にテーパ面３をそれぞれ
形成した一対の板状部材から形成され、前記ハウジング
１に形成したテーパ面３、３と、前記回転軸６の上下面
のテーパ面とが合致し、したがって、ハウジング１のテ
ーパ面３、３間で形成された空間部には前記回転軸６の
膨出部７が位置している。The housing 1 for accommodating the rotary shaft 6 is formed of a pair of plate-like members each having a tapered surface 3 formed at the opening of the hole 5 through which the rotary shaft 6 can be inserted. 3, 3 and the taper surfaces of the upper and lower surfaces of the rotary shaft 6 coincide with each other, so that the bulging portion 7 of the rotary shaft 6 is located in the space formed between the tapered surfaces 3, 3 of the housing 1. is doing.

そして、前記回転軸６の一部のと外周面およびこの部分
に対向するハウジング１の孔５の内周面は互いに反発し
合うように同極に着磁１０されている。A part of the rotary shaft 6 and the outer peripheral surface and the inner peripheral surface of the hole 5 of the housing 1 facing this part are magnetized to the same pole 10 so as to repel each other.

さらに、前記回転ディスク８の上端付近には、回転軸６
の回転量を検知するセンサ９を設置しておく。Further, in the vicinity of the upper end of the rotating disk 8, the rotating shaft 6
A sensor 9 for detecting the rotation amount of is installed.

つぎに上記のものの作用について説明する。Next, the operation of the above will be described.

まず、前記回転軸６が駆動源（図示せず）によって矢印
の方向に回転を開始し、初めはハウジング１のテーパ面
３のうちの下部のテーパ面３に当接して回転していた膨
出部７の、テーパ面に穿たれた溝７ａが空気を掻きなが
ら回転して、前記テーパ面３に押し当てるような空気流
を発生し、この空気流によって膨出部７を浮上する作用
力が発生し、一方、上部のテーパ面３に対しても膨出部
７のテーパ面に穿たれた溝７ａが同様に作用し、したが
って、膨出部７、すなわち、回転軸６をハウジング１の
中央部に支持した状態で回転することとなり、これによ
って、回転軸６は非接触で回転することとなって、長期
の高速回転の維持にも耐え得ることとなり、この回転軸
６の回転量は一体に回転する回転ディスク８の回転量を
センサ９でもって検知することによる知ることができる
ものである。First, the rotary shaft 6 starts to rotate in the direction of the arrow by a drive source (not shown), and initially contacts the lower tapered surface 3 of the tapered surface 3 of the housing 1 and is swollen. The groove 7a formed in the tapered surface of the portion 7 rotates while scratching the air to generate an air flow that presses against the tapered surface 3, and this air flow exerts an acting force to levitate the bulging portion 7. On the other hand, the groove 7a formed in the tapered surface of the bulging portion 7 also acts on the upper tapered surface 3 in the same manner. Therefore, the bulging portion 7, that is, the rotary shaft 6 is moved to the center of the housing 1. The rotary shaft 6 rotates in a state of being supported by a portion, and thereby the rotary shaft 6 rotates in a non-contact manner, which can withstand high-speed rotation for a long period of time. The amount of rotation of the rotating disk 8 that rotates One in which it is possible to know due to the intellectual.

しかも、この回転時に回転軸６の一部の外周面およびこ
の部分に対向するハウジング１の孔５の内周面が互いに
同極に着磁１０されているので、前記膨出部７の空気流
によって回転軸６が第１図の上下方向の移動が規制され
るとともに、磁力によって左右方向への振れが規制さ
れ、確実に回転中心が決められるので高速回転を長時間
に渡って行っても発熱が生じることがなく長寿命化が達
成できることとなる。Moreover, since the outer peripheral surface of a part of the rotary shaft 6 and the inner peripheral surface of the hole 5 of the housing 1 facing this part are magnetized to have the same poles 10 at the time of this rotation, the air flow of the bulging portion 7 is increased. The rotating shaft 6 is restricted from moving in the vertical direction in FIG. 1 and the lateral deflection is restricted by the magnetic force, and the center of rotation is reliably determined, so that heat is generated even if high speed rotation is performed for a long time. It is possible to achieve a longer life without causing

さらに、前記膨出部７は空気流で支持されるので従来の
もののように支承部を配設することなく回転ディスク８
の位置決めを行なうことができるものである。Further, since the bulging portion 7 is supported by the air flow, the rotating disk 8 can be provided without providing a supporting portion unlike the conventional one.
Can be positioned.

なお、前記実施例においては回転軸６およびハウジング
１の孔５に着磁した場合について説明したが、これに限
定することなく永久磁石を配設しても良いということは
勿論である。In addition, in the above-mentioned embodiment, the case where the rotary shaft 6 and the hole 5 of the housing 1 are magnetized has been described, but it is needless to say that a permanent magnet may be provided without being limited to this.

〔考案の効果〕[Effect of device]

この考案は上記のように構成したことにより、回転軸は
空気流を支持部材として回転しするので、従来のものの
ように抵抗となるものがないので長期間の高速回転した
としても摩耗する部材がなく、しかも、回転軸の軸心は
磁力によって規制されているので回転時に回転中心が振
れたりする恐れがないので、長期に渡って円滑な回転を
保障できるなどのすぐれた効果を有するものである。Since the present invention is configured as described above, since the rotating shaft rotates by using the airflow as a supporting member, there is no resistance unlike the conventional one, so that even if it is rotated at high speed for a long period of time, a member that wears Moreover, since the axis of the rotating shaft is regulated by magnetic force, there is no fear of the center of rotation swinging during rotation, so it has an excellent effect of ensuring smooth rotation for a long period of time. .

【図面の簡単な説明】[Brief description of drawings]

第１図はこの考案のロータリエンコーダの説明図、第２
図(a)はこの考案のロータリエンコーダの回転軸に設け
た膨出部のテーパ面に設けた溝の平面図、第２図(b)は
第２図(a)のＣ−Ｃ′に沿ってみた図、第３図は従来の
ロータリエンコーダの説明図である。 １、１１……ハウジング ３……テーパ部 ５、１２……孔 ６、１４……回転軸 ７……膨出部 ７ａ……溝 ８、１６……回転ディスク ９、１７……センサ １０……着磁 １３……軸受 １５……支承部FIG. 1 is an explanatory view of a rotary encoder of this invention, and FIG.
FIG. 2 (a) is a plan view of a groove formed on a tapered surface of a bulge portion provided on a rotary shaft of a rotary encoder of the present invention, and FIG. 2 (b) is taken along line CC ′ of FIG. 2 (a). FIG. 3 and FIG. 3 are explanatory views of a conventional rotary encoder. 1, 11 ...... Housing 3 ...... Tapered part 5, 12 ...... Hole 6, 14 ...... Rotating shaft 7 ...... Expansion part 7a ...... Groove 8, 16 ...... Rotating disk 9, 17 ...... Sensor 10 ...... Magnetization 13 ... Bearing 15 ... Bearing part

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】ハウジングに、一端に回転ディスクが設け
られた回転軸を回転可能に配設するとともに、前記回転
軸の回転量を、前記回転ディスクに隣接して配設された
センサで検知するようにしたロータリエンコーダにおい
て、前記回転軸の中央部に、上下面がテーパ面となる膨
出部を形成するとともに、この膨出部に対応する前記ハ
ウジングの部分にテーパ部を形成し、さらに前記膨出部
の上下面のテーパ面に、回転軸の回転方向と反対方向に
順次深くなる溝を複数穿設し、前記回転軸の回転時に前
記溝による空気流がハウジングのテーパ面に吹き付ける
ようにして回転軸を支持し、さらに前記回転軸の一部の
外周面およびここに対向する前記ハウジングの内周面を
ともに同極にして磁力が反発するようにしたことを特徴
とするロータリエンコーダ。1. A housing is provided with a rotary shaft having a rotary disk provided at one end so as to be rotatable, and a rotation amount of the rotary shaft is detected by a sensor provided adjacent to the rotary disk. In the rotary encoder configured as described above, a bulging portion whose upper and lower surfaces are tapered surfaces is formed in a central portion of the rotating shaft, and a taper portion is formed in a portion of the housing corresponding to the bulging portion, and A plurality of grooves are formed on the tapered surfaces of the upper and lower surfaces of the bulging portion so as to become deeper in the direction opposite to the rotation direction of the rotating shaft, and the air flow by the grooves is blown onto the tapered surface of the housing when the rotating shaft rotates. The rotary shaft is supported by the rotary shaft, and the outer peripheral surface of a part of the rotary shaft and the inner peripheral surface of the housing facing the rotary shaft are made to have the same polarity so that the magnetic force is repulsed. Coder.
JP1988030630U 1988-03-08 1988-03-08 Rotary encoder Expired - Lifetime JPH0620968Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988030630U JPH0620968Y2 (en) 1988-03-08 1988-03-08 Rotary encoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988030630U JPH0620968Y2 (en) 1988-03-08 1988-03-08 Rotary encoder

Publications (2)

Publication Number Publication Date
JPH01134214U JPH01134214U (en) 1989-09-13
JPH0620968Y2 true JPH0620968Y2 (en) 1994-06-01

Family

ID=31255858

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988030630U Expired - Lifetime JPH0620968Y2 (en) 1988-03-08 1988-03-08 Rotary encoder

Country Status (1)

Country Link
JP (1) JPH0620968Y2 (en)

Also Published As

Publication number Publication date
JPH01134214U (en) 1989-09-13

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