JPH02232704A - Frictional driving device - Google Patents

Frictional driving device

Info

Publication number
JPH02232704A
JPH02232704A JP1054601A JP5460189A JPH02232704A JP H02232704 A JPH02232704 A JP H02232704A JP 1054601 A JP1054601 A JP 1054601A JP 5460189 A JP5460189 A JP 5460189A JP H02232704 A JPH02232704 A JP H02232704A
Authority
JP
Japan
Prior art keywords
shaft
rotational
drive
drive rod
driving rod
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
JP1054601A
Other languages
Japanese (ja)
Inventor
Katsunobu Ueda
上田 勝宣
Shigeru Sakuta
佐久田 茂
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP1054601A priority Critical patent/JPH02232704A/en
Priority to DE69007833T priority patent/DE69007833T2/en
Priority to US07/488,890 priority patent/US5062712A/en
Priority to EP90104272A priority patent/EP0386702B1/en
Priority to KR1019900003088A priority patent/KR930010065B1/en
Publication of JPH02232704A publication Critical patent/JPH02232704A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To surely drive a device and to reduce the oscillation by providing a driving rod which is brought into contact with a part of a revolving shaft and a part of a supporting shaft and is moved in the tangential direction and pressing the driving rod toward the revolving shaft and the supporting shaft with a fluid. CONSTITUTION:When power is supplied to a rotation driving mechanism 13, a revolving shaft 6 axially supported by ball bearings 5a to 5c is rotated. Meanwhile, a driving rod 19 is pushed up with the pressure of the fluid supplied to a pressure chamber 18 and is linearly brought into contact with the revolving shaft and a supporting shaft 14 and gives a certain pressing force to both shafts. Consequently, a certain frictional force is applied to a linear contact part 23, and the driving rod 19 is moved in the tangential direction of the revolving shaft 6 in accordance with rotation of the revolving shaft 6. Thus, the rotation of the revolving shaft is surely transmitted to the driving rod, and the oscillation is reduced.

Description

【発明の詳細な説明】[Detailed description of the invention]

〔発明の目的〕 (産業上の利用分野) この発明は、精密位置決めを必要とする半導体製造装置
、情報機器あるいは精密工作機械等においてテーブル等
を直線駆動する駆動装置として用いる摩擦駆動装置に関
する。 (従来の技術) テーブル等を直線駆動する駆動装置として摩擦を利用し
た摩擦駆動装置が知られている。この摩擦駆動装置は、
モータによって回転する回転軸と、この回転軸に対して
直交し、その回転軸の一部に接触する駆動ロッドと、こ
の駆動ロッドを前記回転軸に圧接する押圧手段とから構
成されている。そして、前記押圧手段としてはスプリン
グを用い、このスプリングの弾性力によってローラ等を
介して前記駆動ロッドに圧接することにより、つまり駆
動ロッドを前記回転軸とローラとで扶持し、回転軸の回
転運動を直線運動に変換して駆動ロンドを直線運動させ
ている。前記駆動ロッドは移動自在に支承されたテーブ
ル等に連結されており、回転軸の回転によってテーブル
を移動できるように構成されている。 (発明が解決しようとする課題) ところが、前述した摩擦駆動装置において、スプリング
を用いた押圧手段は、固有振動数を高くしに<<、その
ため共振を起しやすい。共振現象を起すと当然のことな
がら猜度が低下し、精密位置決めを必要とする半導体製
造装置、情報機器あるいは精密工作機械等に採用できな
い。 また、流体押圧手段の場合には駆動ロッドの支持作用と
予圧作用を同時に行なえるため有利であるが、回転軸と
駆動ロッドとの接触部の摩擦力が小さく、スリップが生
じやすく、精密な送りができないという問題がある。 この発明は、前記事情に着目してなされたもので、その
目的とするところは、回転軸の回転運動を駆動ウッドに
確実に伝達させ、駆動ロッドを精密に運動させることが
できる摩擦駆動装置を提供することにある。
[Object of the Invention] (Industrial Application Field) The present invention relates to a friction drive device used as a drive device for linearly driving a table or the like in semiconductor manufacturing equipment, information equipment, precision machine tools, etc. that require precise positioning. (Prior Art) A friction drive device that uses friction is known as a drive device for linearly driving a table or the like. This friction drive device is
It is composed of a rotating shaft rotated by a motor, a drive rod that is perpendicular to the rotating shaft and in contact with a part of the rotating shaft, and a pressing means that presses the driving rod against the rotating shaft. A spring is used as the pressing means, and the elastic force of the spring presses against the drive rod via a roller or the like, that is, the drive rod is supported between the rotation shaft and the roller, and the rotation shaft is moved. is converted into linear motion to make the driving rondo move linearly. The drive rod is connected to a movably supported table or the like, and is configured to be able to move the table by rotating a rotating shaft. (Problems to be Solved by the Invention) However, in the above-mentioned friction drive device, the pressing means using a spring has a high natural frequency, which tends to cause resonance. Naturally, when a resonance phenomenon occurs, the precision decreases, and the device cannot be used in semiconductor manufacturing equipment, information equipment, precision machine tools, etc. that require precise positioning. In addition, fluid pressing means is advantageous because it can support and preload the drive rod at the same time. The problem is that it is not possible. This invention was made in view of the above-mentioned circumstances, and its purpose is to provide a friction drive device that can reliably transmit the rotational motion of the rotating shaft to the drive wood and precisely move the drive rod. It is about providing.

【発明の構成〕[Structure of the invention]

(課題を解決するための手段及び作用)この発明は、前
記目的を達成するために、諸求項1は、回転駆動機構に
よって回転される回転軸と支持軸とを平行に並設し、こ
れら回転軸および支持軸の一部に駆動ロッドを接触して
設け、前記回転軸の回転に伴って駆動ウッドが回転軸の
接線方向に運動するように配置したことにある。 そして、回転軸の回転を摩擦力によって駆勤ロッドに伝
達させ、駆動ウッドを直線運動させるようにしたことに
ある。 請求項2は、請求項1において、前記駆動ロッドを複数
個のガイドローラによって両側から扶持し駆動ロッドを
運動方向に案内するようにしたことにある。 請求項3は、請求項1において、前記回転軸と駆動ロッ
ドとの接触部の少なくとも一方に運動方向と直角をなす
面の形状を凸状とした線接触部を設け、回転軸の回転を
確実に駆動ロッドに伝達させるようにしたことにある。 (実施例) 以下、この発明の一実施例を図面に基づいて説明する。 第1図〜第3図において、1は摩擦駆動装置本体で、こ
れはベース2に固定されたモータハウジング3と、この
モータハウジング3の一側壁に固定された軸ハウジング
4とから構成されている。 前記モータハウジング3にはボールベアリング5aが、
前記軸ハウジング4にはボールベアリング5bs5cが
それぞれ同軸的に設けられており、これらボールベアリ
ング5a〜5Cによって回転軸6が水平状態に、しかも
回転自在に軸支されている。前記モータハウジング3の
内部に位置する前記回転軸6には取付け輪体7を介して
モータロータ8が固着されているとともに、取付け輪体
9を介してタコジェネレータロータ10が固着されてい
る。また、モータハウジング3の内周璧にはモータステ
ータ11およびタコジェネレータステータ12が固定さ
れ、前記モータステータエ1は前記モータロータ8とで
回転駆動機構13を構成している。そして、この回転駆
動機構13によって回転軸6を回転駆動するようになっ
ている。 一方、前記軸ハウジング4の内部には前記回転軸6と平
行に支持軸14が設けられている。この支持軸14は円
筒状をなしており、その両端部は軸ハウジング4の内部
に設けたボールベアリング15a,15bによって回転
自在に軸支されている。さらに、前記軸ハウジング4の
下部璧には回転輔6および支持軸14と直角方向に沿う
開「】部16が設けられている。この開1コ部16は上
部が秋幅部16aに、下部がテーバ状に拡開する広幅部
16bに形成され、この開口部16は前記軸ハウジレグ
4の下部に固定されたケーシング17によって形成され
た加圧室18と連通している。さらに、前記開口部16
の内部には駆動ロッド19が挿入されている。この駆動
ロッド19は前記開[1部l6の狭幅部16aと広幅部
16bと合致するように狭幅部19aと広幅部19bを
有しており、上ド動および回転軸6と直交する方向に移
動自在になっている。この駆動ロッド19は回転軸6と
直角方向に延長しており、その中間部に位置する両側而
は前記ケーシング17に設けた3個のガイドローラ20
・・・によって支承されている。また、前記ケーシング
17によって形成された加圧室18はポート21を介し
て流体圧力供給源(図示しない)に連通しており、前記
駆動ロッド19を前記回転軸6および支持軸14に圧接
する方向に押圧する流体押圧手段22を構成している。 なお、前記流体圧力供給源とポート21との間を結ぶ配
管の途中には圧力レギュレータ(図示しない)を備えて
おり、加圧室18の圧力を設定し、駆動ロッド19の回
転軸6に対する押圧力を任意に設定できるようになって
いる。 また、前記回転軸6と駆動ロッド19との接触部は、第
4図に示すように構成されている。すなイ〕ち、回転軸
6の駆動ロッド19との接触部はトOイダル形状をなし
ており、駆動ロッド19の回転軸6および支持軸14と
の接触部は運動方向と直角をなす面の形状が凸状となっ
ており、回転軸6と駆動ロッド19とが線接触する線接
触部23が形成されている。したがって、回転軸6の片
当りによる駆動ロッド19の偏摩耗が生じにくい。 つぎに、前述のように横成された摩擦駆動装置の作用に
ついて説明する。 回転駆動機構13に通電すると、ボールベアリング5a
〜5Cに軸支された回転軸6は回転する。 一方、駆動ロッド19は加圧室18に供給される流体圧
力によって押し1−げられているため、駆動ロッド19
は回転軸6および支持軸14に線接触し、しかも両軸に
対して一定の押圧力を付与している。したがって、線接
触部23に一定の摩擦力が加わり、回転軸6の回転に伴
って駆動ロッド19は回転fill 6の接線力向に移
動する。このとき、駆動ロッド19は複数個のガイドロ
ーラ20・・・によって両側から支承されているために
、駆動ロッド19は円滑に直線運動し、この直線運動は
連結部材24を介してテーブル25等に伝達される。 したがって、前記テーブル25をvj密位置決めを必要
とする′V導体製造装置、情報機器あるいは精密工作機
械等のテーブル駆動として用いることができる。 なお、前記一実施例においては、回転軸6をトロイダル
形状、駆動ロッド19を凸状とし、線接触部23を形成
したが、駆動ロッド19を凸状とした場合には回転軸6
の接触部を円筒面としてもよい。 〔発明の効果〕 以上説明したように、この発明によれば、駆動ウッドを
複数個のガイドローラによって両側から扶持し駆動ロッ
ドを運動方向に案内するとともに、駆動ロッドを回転軸
ぢよび支持軸の方向に押圧する流体押圧手段を備え、さ
らに前記回転軸と駆動ロッドとの接触部に運動方向と直
角をなす面の形状を凸状とした線接触部を設けることに
よって、回転軸の回転運動を確実に駆動ロッドに伝達さ
せることができる。しかも、流体押圧手段を用いること
により、振動を低減でき、精密位置決めを必要とする半
導体製造装置、情報機器あるいは精密工作機械等のテー
ブル駆動として用いることができるという効果がある。
(Means and effects for solving the problem) In order to achieve the above-mentioned object, claim 1 of the present invention provides that a rotation shaft rotated by a rotation drive mechanism and a support shaft are arranged in parallel, and A driving rod is provided in contact with a part of the rotating shaft and the support shaft, and the driving rod is arranged so that as the rotating shaft rotates, the driving wood moves in the tangential direction of the rotating shaft. The rotation of the rotary shaft is transmitted to the drive rod by frictional force, and the drive wood is moved linearly. A second aspect of the present invention is that in the first aspect, the driving rod is supported from both sides by a plurality of guide rollers to guide the driving rod in the direction of movement. According to a third aspect of the present invention, in claim 1, at least one of the contact portions between the rotary shaft and the drive rod is provided with a line contact portion having a convex surface perpendicular to the direction of movement, thereby ensuring rotation of the rotary shaft. The reason is that the signal is transmitted to the drive rod. (Example) Hereinafter, an example of the present invention will be described based on the drawings. In FIGS. 1 to 3, 1 is a friction drive device main body, which is composed of a motor housing 3 fixed to a base 2 and a shaft housing 4 fixed to one side wall of this motor housing 3. . The motor housing 3 includes a ball bearing 5a,
Ball bearings 5bs5c are coaxially provided in the shaft housing 4, and the rotating shaft 6 is horizontally and rotatably supported by these ball bearings 5a to 5C. A motor rotor 8 is fixed to the rotating shaft 6 located inside the motor housing 3 via a mounting ring 7, and a tachogenerator rotor 10 is fixed via a mounting ring 9. Further, a motor stator 11 and a tachogenerator stator 12 are fixed to the inner peripheral wall of the motor housing 3, and the motor stator 1 and the motor rotor 8 constitute a rotational drive mechanism 13. The rotary shaft 6 is rotatably driven by this rotary drive mechanism 13. On the other hand, a support shaft 14 is provided inside the shaft housing 4 in parallel with the rotation shaft 6. The support shaft 14 has a cylindrical shape, and both ends thereof are rotatably supported by ball bearings 15a and 15b provided inside the shaft housing 4. Further, the lower wall of the shaft housing 4 is provided with an opening 16 extending perpendicularly to the rotary member 6 and the support shaft 14. is formed in a wide part 16b that expands in a tapered shape, and this opening 16 communicates with a pressurizing chamber 18 formed by a casing 17 fixed to the lower part of the shaft housing leg 4. 16
A driving rod 19 is inserted into the interior of the holder. This drive rod 19 has a narrow part 19a and a wide part 19b so as to match the narrow part 16a and wide part 16b of the opening part 16, and has a direction perpendicular to the upper drive and rotation axis 6. It can be moved freely. This drive rod 19 extends in a direction perpendicular to the rotating shaft 6, and the three guide rollers 20 provided in the casing 17 are located at the middle of the drive rod 19.
It is supported by... Further, the pressurizing chamber 18 formed by the casing 17 communicates with a fluid pressure supply source (not shown) through a port 21, and is directed in a direction that presses the drive rod 19 against the rotation shaft 6 and the support shaft 14. It constitutes a fluid pressing means 22 that presses the fluid. Note that a pressure regulator (not shown) is provided in the middle of the piping connecting the fluid pressure supply source and the port 21 to set the pressure in the pressurizing chamber 18 and to control the pressure of the drive rod 19 against the rotating shaft 6. The pressure can be set arbitrarily. Further, the contact portion between the rotating shaft 6 and the drive rod 19 is configured as shown in FIG. 4. In other words, the contact portion of the rotating shaft 6 with the drive rod 19 has a toroidal shape, and the contact portion of the drive rod 19 with the rotating shaft 6 and the support shaft 14 has a surface perpendicular to the direction of movement. has a convex shape, and a line contact portion 23 is formed in which the rotating shaft 6 and the drive rod 19 make line contact. Therefore, uneven wear of the drive rod 19 due to uneven contact of the rotating shaft 6 is less likely to occur. Next, the operation of the friction drive device constructed as described above will be explained. When the rotational drive mechanism 13 is energized, the ball bearing 5a
A rotating shaft 6 supported by ~5C rotates. On the other hand, since the drive rod 19 is pushed up by the fluid pressure supplied to the pressurizing chamber 18, the drive rod 19
is in line contact with the rotation shaft 6 and the support shaft 14, and applies a constant pressing force to both shafts. Therefore, a constant frictional force is applied to the line contact portion 23, and as the rotating shaft 6 rotates, the drive rod 19 moves in the direction of the tangential force of the rotating fill 6. At this time, since the driving rod 19 is supported from both sides by a plurality of guide rollers 20, the driving rod 19 smoothly moves linearly, and this linear movement is transmitted to the table 25 etc. via the connecting member 24. communicated. Therefore, the table 25 can be used as a table drive for VJ conductor manufacturing equipment, information equipment, precision machine tools, etc. that require VJ close positioning. In the above embodiment, the rotating shaft 6 has a toroidal shape and the driving rod 19 has a convex shape to form the line contact portion 23. However, when the driving rod 19 has a convex shape, the rotating shaft 6
The contact portion may be a cylindrical surface. [Effects of the Invention] As explained above, according to the present invention, the drive wood is supported from both sides by a plurality of guide rollers, the drive rod is guided in the direction of movement, and the drive rod is moved between the rotating shaft and the support shaft. The rotary motion of the rotary shaft is controlled by providing a fluid pressing means for pressing the rotary shaft in the direction, and further providing a line contact portion with a convex surface perpendicular to the direction of movement at the contact portion between the rotary shaft and the drive rod. The signal can be reliably transmitted to the drive rod. Furthermore, by using the fluid pressing means, vibrations can be reduced, and the present invention can be used as a table drive for semiconductor manufacturing equipment, information equipment, precision machine tools, etc. that require precise positioning.

【図面の簡単な説明】[Brief explanation of the drawing]

図面はこの発明の摩擦駆動装置の一実施例を示すもので
、第1図は第2図のa−a線に沿う縦断側面図、第2図
は正面図、第3図は平面図、第4図は線接触部を拡大し
て示す縦断側面図である。 6・・・回転軸、13・・・回転駆動機構、14・・・
支持軸、 9・・・駆動ロッ ド、 0・・・ガイ 2・・・流体押圧手段、 3・・・線接触部。 ドローラ、
The drawings show an embodiment of the friction drive device of the present invention, in which FIG. 1 is a longitudinal cross-sectional side view taken along line a-a in FIG. 2, FIG. 2 is a front view, FIG. 3 is a plan view, and FIG. FIG. 4 is a longitudinal sectional side view showing an enlarged line contact portion. 6... Rotating shaft, 13... Rotating drive mechanism, 14...
Support shaft, 9... Drive rod, 0... Guy 2... Fluid pressing means, 3... Line contact portion. Dolora,

Claims (3)

【特許請求の範囲】[Claims] (1)回転駆動機構と、この回転駆動機構によって回転
される回転軸と、この回転軸と平行に並設された支持軸
と、前記回転軸および支持軸の一部に接触して設けられ
前記回転軸の回転に伴って接線方向に運動する駆動ロッ
ドと、この駆動ロッドを前記回転軸および支持軸の方向
に押圧する流体押圧手段とを具備したことを特徴とする
摩擦駆動装置。
(1) A rotational drive mechanism, a rotational shaft rotated by the rotational drive mechanism, a support shaft arranged parallel to the rotational shaft, and a rotational shaft provided in contact with a part of the rotational shaft and the support shaft. A friction drive device comprising: a drive rod that moves in a tangential direction as the rotation shaft rotates; and fluid pressing means that presses the drive rod in the direction of the rotation shaft and the support shaft.
(2)回転駆動機構と、この回転駆動機構によって回転
される回転軸と、この回転軸と平行に並設された支持軸
と、前記回転軸および支持軸の一部に接触して設けられ
前記回転軸の回転に伴って接線方向に運動する駆動ロッ
ドと、この駆動ロッドをその両側から挟持し駆動ロッド
を運動方向に案内する複数個のガイドローラと、前記駆
動ロッドを前記回転軸および支持軸の方向に押圧する流
体押圧手段とを具備したことを特徴とする摩擦駆動装置
(2) a rotational drive mechanism, a rotational shaft rotated by the rotational drive mechanism, a support shaft arranged parallel to the rotational shaft, and a support shaft provided in contact with a part of the rotational shaft and the support shaft; A drive rod that moves tangentially as the rotation shaft rotates; a plurality of guide rollers that sandwich the drive rod from both sides and guide the drive rod in the direction of movement; 1. A friction drive device comprising a fluid pressing means for pressing in the direction of.
(3)回転駆動機構と、この回転駆動機構によって回転
される回転軸と、この回転軸と平行に並設された支持軸
と、前記回転軸および支持軸の一部に接触して設けられ
前記回転軸の回転に伴って接線方向に運動する駆動ロッ
ドと、前記回転軸と駆動ロッドとの接触部の少なくとも
一方に形成され運動方向と直角をなす面の形状を凸状と
した線接触部と、前記駆動ロッドを前記回転軸および支
持軸の方向に押圧する流体押圧手段とを具備したことを
特徴とする摩擦駆動装置。
(3) a rotary drive mechanism, a rotary shaft rotated by the rotary drive mechanism, a support shaft arranged parallel to the rotary shaft, and a rotary shaft provided in contact with a part of the rotary shaft and the support shaft; a driving rod that moves in a tangential direction as the rotating shaft rotates; and a line contact portion formed on at least one of the contact portions between the rotating shaft and the driving rod and having a convex surface perpendicular to the direction of movement. , a fluid pressing means for pressing the drive rod in the direction of the rotation shaft and the support shaft.
JP1054601A 1989-03-07 1989-03-07 Frictional driving device Pending JPH02232704A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP1054601A JPH02232704A (en) 1989-03-07 1989-03-07 Frictional driving device
DE69007833T DE69007833T2 (en) 1989-03-07 1990-03-06 Coarse / fine alignment device.
US07/488,890 US5062712A (en) 1989-03-07 1990-03-06 Aligning apparatus with a coarse/fine movement controller and an ultrafine movement controller
EP90104272A EP0386702B1 (en) 1989-03-07 1990-03-06 Coarse/fine movement aligning apparatus
KR1019900003088A KR930010065B1 (en) 1989-03-07 1990-03-07 Coarse/fine movement aligning apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1054601A JPH02232704A (en) 1989-03-07 1989-03-07 Frictional driving device

Publications (1)

Publication Number Publication Date
JPH02232704A true JPH02232704A (en) 1990-09-14

Family

ID=12975250

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1054601A Pending JPH02232704A (en) 1989-03-07 1989-03-07 Frictional driving device

Country Status (1)

Country Link
JP (1) JPH02232704A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103472852A (en) * 2013-09-10 2013-12-25 常州大学 Two-degree-of-freedom two-rotation parallel mechanism

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5495867A (en) * 1978-01-11 1979-07-28 Furukawa Electric Co Ltd:The Spool positioning equipment for wire winding machine
JPS62200283A (en) * 1986-02-28 1987-09-03 株式会社東芝 Noncontact type feed-table
JPS63132317A (en) * 1986-11-25 1988-06-04 Toshiba Corp Frictional driving device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5495867A (en) * 1978-01-11 1979-07-28 Furukawa Electric Co Ltd:The Spool positioning equipment for wire winding machine
JPS62200283A (en) * 1986-02-28 1987-09-03 株式会社東芝 Noncontact type feed-table
JPS63132317A (en) * 1986-11-25 1988-06-04 Toshiba Corp Frictional driving device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103472852A (en) * 2013-09-10 2013-12-25 常州大学 Two-degree-of-freedom two-rotation parallel mechanism

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