JPH05176496A - Rotation straight line conversion mechanism - Google Patents
Rotation straight line conversion mechanismInfo
- Publication number
- JPH05176496A JPH05176496A JP34493691A JP34493691A JPH05176496A JP H05176496 A JPH05176496 A JP H05176496A JP 34493691 A JP34493691 A JP 34493691A JP 34493691 A JP34493691 A JP 34493691A JP H05176496 A JPH05176496 A JP H05176496A
- Authority
- JP
- Japan
- Prior art keywords
- conversion mechanism
- magnetic body
- magnet
- moving body
- straight line
- 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
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 17
- 230000005291 magnetic effect Effects 0.000 claims abstract description 22
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
Landscapes
- Transmission Devices (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
(57)【要約】
【目的】 本発明は、回転直線変換機構に関し、特に、
摩擦による機械的損失を可能な限り低減させることを特
徴とする。
【構成】 本発明による回転直線変換機構は、モータ
（７）により回転する回転軸（２）の周囲にこの回転軸
（２）と一体状に設けられた螺旋状の磁性体（１０）
と、前記磁性体（１０）と対向し直線移動自在に設けら
れた移動体（５）と、この移動体（５）に設けられ前記
磁性体（１０）と非接触状態を維持した磁石（１２）と
を備え、前記磁性体（１０）の回転により前記磁石（１
２）を介して前記移動体（５）を直線往復移動できる構
成である。
(57) [Abstract] [Object] The present invention relates to a rotary linear conversion mechanism, and in particular,
It is characterized by reducing mechanical loss due to friction as much as possible. According to the rotation straight line conversion mechanism of the present invention, a spiral magnetic body (10) is integrally provided with the rotation shaft (2) around the rotation shaft (2) rotated by a motor (7).
A moving body (5) facing the magnetic body (10) so as to be linearly movable; and a magnet (12) provided on the moving body (5) and kept in non-contact with the magnetic body (10). ) And the magnet (1
The moving body (5) can be linearly reciprocated via the second step (2).
Description
【０００１】[0001]
【産業上の利用分野】本発明は、回転直線変換機構に関
し、特に、摩擦による機械的損失を可能な限り低減させ
るための新規な改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary linear conversion mechanism, and more particularly to a novel improvement for reducing mechanical loss due to friction as much as possible.
【０００２】[0002]
【従来の技術】従来、工作機械の数値制御による位置決
めに好んで用いられるものとして、図２に示すようなボ
ールねじ１がある。このボールねじ１は、螺旋溝２ａを
外囲に形成した回転軸２と、螺旋溝３ａを内周に形成し
たナット部３との間に複数のボール４を配置した構成に
なっている。前記ボールねじ１は、図３に示すように、
前記ナット部３に固定された移動体５を直線往復移動さ
せる回転直線変換機構６の一部として利用されている。
この回転直線変換機構６は、前記ボールねじ１の回転軸
２を正転又は逆転させるためのたサーボモータ７を備
え、このサーボモータ７は減速機構をなす歯車列８を介
して前記回転軸２に連結されている。従って、前記サー
ボモータ７の回転に追従して回転軸２が回転し、それに
伴ってナット部３及び移動体５が、回転軸２の軸線方向
に直線移動する。2. Description of the Related Art Conventionally, there is a ball screw 1 as shown in FIG. 2 which has been favorably used for positioning by numerical control of a machine tool. The ball screw 1 has a configuration in which a plurality of balls 4 are arranged between a rotary shaft 2 having a spiral groove 2a formed on the outer circumference thereof and a nut portion 3 having a spiral groove 3a formed on the inner circumference thereof. The ball screw 1 is, as shown in FIG.
It is used as a part of a rotary linear conversion mechanism 6 that linearly reciprocates the moving body 5 fixed to the nut portion 3.
The rotation straight line conversion mechanism 6 includes a servomotor 7 for rotating the rotation shaft 2 of the ball screw 1 in the normal direction or the reverse direction. The servomotor 7 is provided with the rotation shaft 2 via a gear train 8 forming a reduction mechanism. Is linked to. Therefore, the rotary shaft 2 rotates following the rotation of the servomotor 7, and the nut portion 3 and the moving body 5 linearly move in the axial direction of the rotary shaft 2 accordingly.
【０００３】[0003]
【発明が解決しようとする課題】従来の回転直線変換機
構６は、以上のように構成されていたため、次のような
課題が存在していた。すなわち、回転直線変換機構に利
用されるボールねじ１は、一般の滑り接触式のねじに比
べ摩擦は非常に小さいものとなっているが、それでも機
械効率は９５％程度であり５％程度の摩擦損失は発生し
てしまう。また、ボール４は、螺旋溝２ａ，３ａと機械
的に接触しているので、ボール４や螺旋溝２ａ，３ａの
摩耗量に伴って、移動体５の移動誤差が大きくなると共
に、寿命が限られてしまうという問題点があった。Since the conventional rotary straight line conversion mechanism 6 is constructed as described above, the following problems exist. That is, the ball screw 1 used in the rotation linear conversion mechanism has much less friction than a general sliding contact type screw, but the mechanical efficiency is still about 95% and the friction of about 5%. Losses will occur. Further, since the balls 4 are in mechanical contact with the spiral grooves 2a and 3a, the movement error of the moving body 5 increases with the wear amount of the balls 4 and the spiral grooves 2a and 3a, and the life is limited. There was a problem that they would be caught.
【０００４】本発明は、以上のような課題を解決するた
めになされたもので、特に、摩擦による機械的損失を可
能な限り低減するようにした回転直線変換機構を提供す
ることを目的とする。The present invention has been made to solve the above problems, and in particular, it is an object of the present invention to provide a rotary linear conversion mechanism that reduces mechanical loss due to friction as much as possible. .
【０００５】[0005]
【課題を解決するための手段】本発明による回転直線変
換機構は、モータにより回転する回転軸の周囲にこの回
転軸と一体状に設けられた螺旋状の磁性体と、前記磁性
体と対向し直線移動自在に設けられた移動体と、この移
動体に設けられ前記磁性体と非接触状態を維持した磁石
とを備え、前記磁性体の回転により前記磁石を介して前
記移動体を直線往復移動できるように構成したものであ
る。According to the present invention, there is provided a rotary straight line conversion mechanism, in which a spiral magnetic body integrally provided with a rotary shaft which is rotated by a motor and which is opposed to the magnetic body. The moving body is provided so as to be linearly movable, and the magnet is provided on the moving body and is kept in a non-contact state with the magnetic body. It is configured to be possible.
【０００６】[0006]
【作用】本発明による回転直線変換機構においては、モ
ータにより回転軸を回転させることにより、この回転軸
の周囲に螺旋状に設けられた磁性体と、この磁性体と非
接触状態を維持した磁石との吸引作用により、モータの
回転による回転軸の回転に追従して、前記磁石を設けた
移動体が直線移動するので、摩擦による機械的損失を可
能な限り低減させることができる。In the rotary straight line conversion mechanism according to the present invention, the rotating shaft is rotated by the motor, so that the magnetic body is spirally provided around the rotating shaft and the magnet is maintained in a non-contact state with the magnetic body. By the suction action of and, the moving body provided with the magnet linearly moves following the rotation of the rotating shaft due to the rotation of the motor, so that mechanical loss due to friction can be reduced as much as possible.
【０００７】[0007]
【実施例】以下、図面と共に本発明による回転直線変換
機構の好適な実施例について詳細に説明する。なお、従
来例と同一又は同等部分については、同一符号を用いて
説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the rotary straight line conversion mechanism according to the present invention will be described in detail below with reference to the drawings. It should be noted that the same or equivalent portions as those of the conventional example will be described using the same reference numerals.
【０００８】図１に示すように、符号１０は、円柱状を
なす回転軸２の外周に螺旋状に一体成形された強磁性体
である。この強磁性体１０及び前記回転軸２は、筺体１
１内に回転自在に収容され、この筺体１１の上部には、
前記磁性体１０に対向し且つ直線状の案内溝１１ａを介
して、台状の移動体５が直線移動自在に載置されてい
る。As shown in FIG. 1, reference numeral 10 is a ferromagnetic material which is integrally formed in a spiral shape on the outer periphery of a cylindrical rotating shaft 2. The ferromagnetic body 10 and the rotating shaft 2 are provided in a housing 1
1 is rotatably housed in the upper part of the housing 11,
A trapezoidal moving body 5 is mounted movably in a straight line via a linear guide groove 11a facing the magnetic body 10.
【０００９】この移動体５と、前記強磁性体１０の螺旋
状をした頂面１０ａとの間には永久磁石１２が配置さ
れ、この磁石１２は、移動体５の底部に固定されてい
る。前記磁石１２の先端部１２ａは、前記磁性体１０の
頂面１０ａと所定距離だけ離間して非接触状態を維持す
るように載置されると共に、筺体１１内で前記案内溝１
１ａに沿って直線的に移動できるように挿入されてい
る。従って、前記磁性体１０の移動に追従して、前記移
動体５を直線的に移動させることができる。なお、符号
７はサーボモータ、符号８は減速機構をなす歯車列であ
る。A permanent magnet 12 is arranged between the moving body 5 and the spiral top surface 10a of the ferromagnetic body 10, and the magnet 12 is fixed to the bottom of the moving body 5. The tip portion 12a of the magnet 12 is placed so as to be separated from the top surface 10a of the magnetic body 10 by a predetermined distance so as to maintain a non-contact state, and the guide groove 1 is placed in the housing 11.
It is inserted so as to be linearly movable along 1a. Therefore, the moving body 5 can be moved linearly following the movement of the magnetic body 10. Reference numeral 7 is a servo motor, and reference numeral 8 is a gear train forming a reduction mechanism.
【００１０】前述の構成による動作を以下説明する。前
記サーボモータ７をある一定の制御に基づいて回転させ
ると、この回転は、前記歯車列８を介して、回転軸２に
伝達される。この回転軸２の回転により螺旋状の磁性体
１０が回転し、それに追従して、前記磁性体１０の頂面
１０ａと対向状態にある磁石１２が、その吸引力により
案内溝１１ａに沿って直線移動する。その結果、移動体
５は、筺体１１上を直線的に移動させ、前記磁性体１０
の頂面１０ａと前記磁石１２の先端部１２ａとは、非接
触状態にあるので、摩擦が起こらず、前記移動体５に対
して滑らかな直線運動を提供している。The operation of the above configuration will be described below. When the servo motor 7 is rotated under a certain control, this rotation is transmitted to the rotary shaft 2 via the gear train 8. The rotation of the rotary shaft 2 causes the spiral magnetic body 10 to rotate, and the magnet 12 that follows the top surface 10a of the magnetic body 10 is linearly moved along the guide groove 11a by its attractive force. Moving. As a result, the moving body 5 linearly moves on the housing 11, and the magnetic body 10 is moved.
Since the top surface 10a of the magnet 10 and the tip portion 12a of the magnet 12 are not in contact with each other, friction does not occur, and a smooth linear motion is provided to the moving body 5.
【００１１】なお、本発明は前述の実施例に限定され
ず、例えば、前記磁性体１０の個々の螺旋ピッチを変え
ることにより、移動体５の移動速度に変化をつけること
ができる。即ち、前記サーボモータ７の回転が一定であ
ると仮定した場合、螺旋ピッチを長くすると、その部分
で移動体５の移動速度を早くすることができ、その反対
に、螺旋ピッチを短くすると、移動体５の移動速度を遅
くすることができる。また、図１に示されているよう
に、磁性体１０の頂面１０ａの表面積を変えることによ
り、前記磁石１０との吸引力を変化させることができ、
前記磁石１０を電磁石にすることにより、更に強力な吸
引力を発生させ、前記移動体５の直線往復移動を更に安
定させることが可能となる。The present invention is not limited to the above-mentioned embodiment, and the moving speed of the moving body 5 can be changed by changing the individual spiral pitch of the magnetic body 10, for example. That is, assuming that the rotation of the servomotor 7 is constant, if the spiral pitch is lengthened, the moving speed of the moving body 5 can be increased at that portion, and conversely, if the spiral pitch is shortened, the moving speed is increased. The moving speed of the body 5 can be reduced. Further, as shown in FIG. 1, by changing the surface area of the top surface 10a of the magnetic body 10, the attraction force with the magnet 10 can be changed,
By making the magnet 10 an electromagnet, a stronger attraction force can be generated and the linear reciprocating movement of the moving body 5 can be further stabilized.
【００１２】[0012]
【発明の効果】本発明による回転直線変換機構は、以上
のように構成されているため、次のような効果を得るこ
とができる。すなわち、回転体に螺旋状に巻かれた磁性
体と、移動体に固定された磁石とが常に非接触状態にあ
るので、摩擦による機械的損失を可能な限り低減させる
ことができ、移動体の直線移動をより滑らかなものとす
ることができる。Since the rotary linear conversion mechanism according to the present invention is constructed as described above, the following effects can be obtained. That is, since the magnetic body spirally wound around the rotating body and the magnet fixed to the moving body are always in non-contact with each other, the mechanical loss due to friction can be reduced as much as possible. The linear movement can be made smoother.
【図１】本発明の回転直線変換機構の一実施例を示す断
面図である。FIG. 1 is a sectional view showing an embodiment of a rotary straight line conversion mechanism of the present invention.
【図２】従来の回転直線変換機構を示す断面図である。FIG. 2 is a cross-sectional view showing a conventional rotary straight line conversion mechanism.
【図３】図２の要部を示す拡大断面図である。FIG. 3 is an enlarged sectional view showing a main part of FIG.
２ 回転体 ５ 移動体 ６ 回転直線変換機構 ７ モータ １０ 磁性体 １２ 磁石 2 rotating body 5 moving body 6 rotation linear conversion mechanism 7 motor 10 magnetic body 12 magnet
Claims (1)
（２）の周囲にこの回転軸（２）と一体状に設けられた
螺旋状の磁性体（１０）と、前記磁性体（１０）と対向
し直線移動自在に設けられた移動体（５）と、この移動
体（５）に設けられ前記磁性体（１０）と非接触状態を
維持した磁石（１２）とを備え、前記磁性体（１０）の
回転により前記磁石（１２）を介して前記移動体（５）
を直線往復移動できるように構成したことを特徴とする
回転直線変換機構。1. A spiral magnetic body (10) integrally provided with the rotating shaft (2) around the rotating shaft (2) rotated by a motor (7), and the magnetic body (10). The magnetic body (5) is provided so as to face each other and is linearly movable, and a magnet (12) provided on the mobile body (5) and kept in a non-contact state with the magnetic body (10). 10) Rotation of the moving body (5) through the magnet (12)
A rotary straight line conversion mechanism characterized by being configured to be capable of linearly reciprocating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34493691A JPH05176496A (en) | 1991-12-26 | 1991-12-26 | Rotation straight line conversion mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34493691A JPH05176496A (en) | 1991-12-26 | 1991-12-26 | Rotation straight line conversion mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05176496A true JPH05176496A (en) | 1993-07-13 |
Family
ID=18373158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34493691A Pending JPH05176496A (en) | 1991-12-26 | 1991-12-26 | Rotation straight line conversion mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05176496A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0993904A (en) * | 1995-09-21 | 1997-04-04 | Ckd Corp | Transferring apparatus for clean room |
| US6084326A (en) * | 1998-02-04 | 2000-07-04 | Smc Kabushiki Kaisha | Actuator |
| JP2005530049A (en) * | 2002-05-10 | 2005-10-06 | テクスティルマ・アクチェンゲゼルシャフト | Cordless yarn control device |
| JP2008221393A (en) * | 2007-03-13 | 2008-09-25 | Nitta Ind Corp | Automatic tool changer |
| EP2890949A4 (en) * | 2013-04-30 | 2016-06-15 | Quality Vision Int Inc | MEASUREMENT PROBE DEPLOYMENT MECHANISM WITH INSULATED LOCATOR COUPLING |
| JP2019085245A (en) * | 2017-11-08 | 2019-06-06 | Ｎｋｅ株式会社 | Conveying device and conveying body |
-
1991
- 1991-12-26 JP JP34493691A patent/JPH05176496A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0993904A (en) * | 1995-09-21 | 1997-04-04 | Ckd Corp | Transferring apparatus for clean room |
| US6084326A (en) * | 1998-02-04 | 2000-07-04 | Smc Kabushiki Kaisha | Actuator |
| JP2005530049A (en) * | 2002-05-10 | 2005-10-06 | テクスティルマ・アクチェンゲゼルシャフト | Cordless yarn control device |
| JP2008221393A (en) * | 2007-03-13 | 2008-09-25 | Nitta Ind Corp | Automatic tool changer |
| JP4632058B2 (en) * | 2007-03-13 | 2011-02-16 | ニッタ株式会社 | Automatic tool changer |
| EP2890949A4 (en) * | 2013-04-30 | 2016-06-15 | Quality Vision Int Inc | MEASUREMENT PROBE DEPLOYMENT MECHANISM WITH INSULATED LOCATOR COUPLING |
| JP2019085245A (en) * | 2017-11-08 | 2019-06-06 | Ｎｋｅ株式会社 | Conveying device and conveying body |
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