JPH01307563A - Feed screw - Google Patents
Feed screwInfo
- Publication number
- JPH01307563A JPH01307563A JP13714088A JP13714088A JPH01307563A JP H01307563 A JPH01307563 A JP H01307563A JP 13714088 A JP13714088 A JP 13714088A JP 13714088 A JP13714088 A JP 13714088A JP H01307563 A JPH01307563 A JP H01307563A
- Authority
- JP
- Japan
- Prior art keywords
- retaining ring
- screw shaft
- screw
- balls
- feed screw
- 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
- 230000002093 peripheral effect Effects 0.000 abstract 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はナツト部のりテーニングリングにころがり要素
のボールを組み込み、スクリューシャフトとナツト部の
摩擦トルクを軽減できるようにしたフィードスクリュー
に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a feed screw in which a ball as a rolling element is incorporated into a tening ring of a nut portion, thereby making it possible to reduce the frictional torque between the screw shaft and the nut portion.
［従来技術とその欠点］
例えばＸ−Ｙテーブル等において、テーブルを軸線上に
移動させる際に用いられる従来のフィードスクリューは
、ねじを形成したスクリューシャフトにナツトを螺合さ
せた構造となっている。[Prior art and its drawbacks] A conventional feed screw used to move the table along its axis, for example in an X-Y table, has a structure in which a nut is screwed into a threaded screw shaft. .
この従来のフィードスクリューでは、スクリューシャフ
トに螺合したキャリヤ取付用のナツト部がシャフト軸方
向に運動する際の螺合部の摩擦が大で、スクリューシャ
フトおよびナツト部が摩耗しやすく、ガタやバックラッ
シュを生じやすいという欠点があり、また高速直線運動
は不可能であった。In this conventional feed screw, when the nut part for mounting the carrier screwed onto the screw shaft moves in the axial direction of the shaft, the friction of the threaded part is large, which causes the screw shaft and nut part to wear easily, causing backlash and backlash. It has the disadvantage of being prone to lash, and high-speed linear motion is not possible.
［目的］
本発明はこのような欠点を解消するために摩擦トルクが
きわめて少く、しかも高速直線運動のできるフィードス
クリューを提供できるようにした。[Objective] In order to eliminate these drawbacks, the present invention has made it possible to provide a feed screw that has extremely low friction torque and is capable of high-speed linear motion.
［手段］
上記目的を達成する為に、本発明に係るフィードスクリ
ューは多条ねじを形成したスクリューシャフトにリテー
ニングリングを遊嵌し、このリテーニングリングの内周
曲に形成した周溝と前記スクリュウシャフトのねじ溝と
の間に複数個のボールを配した構成のものとしである。[Means] In order to achieve the above object, the feed screw according to the present invention has a retaining ring loosely fitted to a screw shaft formed with a multi-thread thread, and a circumferential groove formed on the inner circumference of the retaining ring and the above-mentioned It has a structure in which a plurality of balls are arranged between the screw shaft and the thread groove.
［本発明の実施例］
次ぎに１本発明の一実施例を添付図面に示す一具体例に
よって説明する。[Embodiment of the present invention] Next, an embodiment of the present invention will be described with reference to a specific example shown in the accompanying drawings.
第１図ないし第３図において、例えば６条のねじが形成
された多条ねじのスクリューシャフトｌの一端は図示し
ない駆動部に接続され、他端は適宜軸受にて支承されて
いる。In FIGS. 1 to 3, one end of a multi-thread screw shaft l having, for example, six threads is connected to a drive section (not shown), and the other end is supported by an appropriate bearing.
このスクリューシャフト１には、リテーニングリング２
を嵌めてあり、リテーニングリング２の内周には溝３を
設けである。この溝３とスクリューシャフト１上のねじ
溝４とで、各ねじ溝４にそれぞれに配された複数のボー
ル５を、スクリューシャフトｌの軸方向に対して直交す
る周上に保持している。This screw shaft 1 has a retaining ring 2.
A groove 3 is provided on the inner circumference of the retaining ring 2. This groove 3 and the thread groove 4 on the screw shaft 1 hold a plurality of balls 5 respectively arranged in each thread groove 4 on a circumference perpendicular to the axial direction of the screw shaft 1.
また、スクリューシャツ）１と平行に固定のガイドＢを
設けてあって、リテーニングリング２外周適所に突設し
た径方向の軸８カー、前記ガイド６に設けた案内溝７内
に臨んでおり、これによりリテーニングリング２はまわ
りどめされている。In addition, a fixed guide B is provided parallel to the screw shirt 1, and a radial shaft 8 protruding from the outer periphery of the retaining ring 2 at a suitable location faces into the guide groove 7 provided in the guide 6. , whereby the retaining ring 2 is prevented from rotating.
ここで、図示しない駆動部のモータが駆動されることに
よりスクリューシャフトｌが回転すると、軸８が固定ガ
イド８の案内溝７に臨んでシャツ）１に対してまわり止
めされているリテーニングリング２は、スクリューシャ
フトｌの回転に応じてシャフト１の軸方向の一方へ移動
し、モータが逆転することによりリテーニングリングは
反対方向へ移動させられる。Here, when the screw shaft 1 is rotated by driving the motor of the drive unit (not shown), the shaft 8 faces the guide groove 7 of the fixed guide 8, and the retaining ring 2 is prevented from rotating with respect to the shirt 1. is moved in one direction in the axial direction of the shaft 1 in accordance with the rotation of the screw shaft 1, and the retaining ring is moved in the opposite direction as the motor reverses.
このように構成されるフィードスクリューでは、リテー
ニングリング２とスクリューシャフト１が、ボール５に
点接触しているだけであり、含油メタルナツトや樹脂製
ナツトがスクリューシャフトに直接螺合している従来の
ものに比べて摩擦抵抗は遥かに小さく、加えてスクリュ
ーシャフト１はたとえば６条等の複数条のねじ切りがな
されているので、６ビツチ等の複数ピッチのリードが得
られ、リテーニングリングを高速で左右に送ることがで
きる。In the feed screw configured in this way, the retaining ring 2 and the screw shaft 1 are in only point contact with the ball 5, unlike the conventional feed screw in which an oil-impregnated metal nut or a resin nut is directly screwed onto the screw shaft. In addition, the screw shaft 1 has multiple threads, such as 6 threads, so a lead with multiple pitches, such as 6 bits, can be obtained, and the retaining ring can be moved at high speed. Can be sent left and right.
次ぎに他の実施例を示す第４図において、例えば６条の
ねじを形成したスクリューシャフトｌの外周部には、複
数のボール５を介して左右のりテーニングリング２ａ、
２ｂをそれぞれ配してあり、これらのりテーニングリン
グ２ａ、２ｂの間には圧縮スプリング１０を設けである
。Next, in FIG. 4 showing another embodiment, for example, on the outer circumference of a screw shaft l formed with six threads, left and right retaining rings 2a are attached via a plurality of balls 5.
2b, and a compression spring 10 is provided between these tening rings 2a, 2b.
両リテーニングリング２ａ、２ｂへ嵌めた１個のハウジ
ング１１は、キャリヤ取材用フランジ１２に止めねじ１
３を用いて取り付けてあり、スプリング１０を挟んだリ
ング２ａ、２ｂをスクリューシャフト１に対して直交す
る定位置に保持している。このキャリヤ取材用フランジ
１２には複数のキャリヤ取付用孔１４を穿設しである。One housing 11 fitted into both retaining rings 2a and 2b is attached with a set screw 1 to a flange 12 for carrier coverage.
3, and holds the rings 2a and 2b sandwiching the spring 10 in a fixed position orthogonal to the screw shaft 1. This carrier coverage flange 12 is provided with a plurality of carrier attachment holes 14.
このように、リテーニングリング２ａ、２ｂの間に圧縮
スプリング１０を挟み込んで予め他方向に圧力をかけて
おくことにより、ボール５とねじ溝４とに生じるバック
ラッシュを最小にすることが可能となる。In this way, by sandwiching the compression spring 10 between the retaining rings 2a and 2b and applying pressure in the other direction in advance, it is possible to minimize the backlash that occurs between the ball 5 and the thread groove 4. Become.
また、引張スプリングを用いてリテーニングリング２ａ
、２ｂ間に圧力をかけても同様の効果を期すことができ
る。In addition, the retaining ring 2a is attached using a tension spring.
, 2b can achieve the same effect.
更に１図示しないキャリヤをリテーニングリング２ａ、
２ｂの２つのリングでスクリューシャフト１上に支承し
ているので、ボール５が各々の位置で受ける荷重負荷が
分散され。Further, a carrier (not shown) is attached to a retaining ring 2a,
Since it is supported on the screw shaft 1 by the two rings 2b, the load that the ball 5 receives at each position is distributed.
ボール５と溝４の間の摩擦抵抗は一層軽減される。これ
により、キャリヤを安定した状懲でシャフトｌの軸方向
左右に素早くかつスムーズに送ることが可能となる０本
実施例に於いては、リテーニングリングを２個としたが
、３個以上のりテーニングリングを設ければ、さらに荷
重負荷を軽減することができる。The frictional resistance between the ball 5 and the groove 4 is further reduced. This makes it possible to quickly and smoothly feed the carrier to the left and right in the axial direction of the shaft l in a stable condition.In this embodiment, two retaining rings are used, but three or more retaining rings are used. If a tening ring is provided, the load can be further reduced.
［効果１
本発明に係るフィードスクリューによれば、リテーニン
グリングにころがり要素のボールを組み込んであるので
、従来のナツトとスクリューシャフトの組合せによるフ
ィードスクリューに比べ、ｊａ度、耐久性が遥かに向上
するとともに、リテーニングリングを高速移動させるこ
とができ、また、構造が簡単であるので、低コストにて
容易に製造が可使となる。[Effect 1] According to the feed screw according to the present invention, since the retaining ring incorporates a ball as a rolling element, the ja degree and durability are far improved compared to a feed screw that uses a combination of a conventional nut and screw shaft. In addition, since the retaining ring can be moved at high speed and the structure is simple, it can be manufactured easily at low cost.
さ、らに、多条ねじを用いる本発明のものは条数に比例
したリードが得られ、高速動作を要するプリンタヘッド
送り機構やＸ−Ｙテーブル等に好適である。Furthermore, the present invention using a multi-thread screw provides a lead proportional to the number of threads, and is suitable for printer head feeding mechanisms, X-Y tables, etc. that require high-speed operation.
ｆｆ１１図は本発明に係るフィードスクリューの平面図
、第２図は上記フィードスクリューのりテーニングリン
グ部を拡大して示す断面図。
第３図は上記リテーニングリング部の要部を拡大して示
す断面図、第４図は他の実施例のフィードスクリューの
断面図である。
図中
１ スクリューシャフト
２．２ａ、２ｂ リテーニングリング３ ｆｔ
’！ｊ ４ ねじ溝５ ボール
６ ガイド
７ 案内溝 ８ 軸
１０ 圧縮スプリング １１ ハウジング１２
キャリヤ取付用フランジFig. ff11 is a plan view of the feed screw according to the present invention, and Fig. 2 is an enlarged sectional view showing the tening ring portion of the feed screw. FIG. 3 is an enlarged cross-sectional view of the main part of the retaining ring portion, and FIG. 4 is a cross-sectional view of a feed screw according to another embodiment. 1 in the diagram Screw shaft 2.2a, 2b Retaining ring 3 ft
'! j 4 Screw groove 5 Ball
6 Guide 7 Guide groove 8 Shaft 10 Compression spring 11 Housing 12
Carrier mounting flange
Claims (1)
リングを遊嵌し、このリテーニングリングの内周面に形
成した周溝と前記スクリュウシャフトのねじ溝との間に
複数個のボールを配してなるフィードスクリュー。A retaining ring is loosely fitted onto a screw shaft formed with a multi-start thread, and a plurality of balls are arranged between a circumferential groove formed on the inner circumferential surface of the retaining ring and a thread groove of the screw shaft. feed screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13714088A JPH01307563A (en) | 1988-06-03 | 1988-06-03 | Feed screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13714088A JPH01307563A (en) | 1988-06-03 | 1988-06-03 | Feed screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01307563A true JPH01307563A (en) | 1989-12-12 |
Family
ID=15191753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13714088A Pending JPH01307563A (en) | 1988-06-03 | 1988-06-03 | Feed screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01307563A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2812057A1 (en) * | 2000-07-21 | 2002-01-25 | Mannesmann Sachs Ag | Ball transmission for machine tool has rolling radius of each ball in the nut's groove superior to the rolling radius of each ball in the screw's groove |
| US7013576B2 (en) | 2001-12-28 | 2006-03-21 | Mitutoyo Corporation | Measuring device using multi-start threaded spindle |
| JP2011169423A (en) * | 2010-02-19 | 2011-09-01 | Icomes Labo:Kk | Linear motion device |
-
1988
- 1988-06-03 JP JP13714088A patent/JPH01307563A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2812057A1 (en) * | 2000-07-21 | 2002-01-25 | Mannesmann Sachs Ag | Ball transmission for machine tool has rolling radius of each ball in the nut's groove superior to the rolling radius of each ball in the screw's groove |
| US7013576B2 (en) | 2001-12-28 | 2006-03-21 | Mitutoyo Corporation | Measuring device using multi-start threaded spindle |
| JP2011169423A (en) * | 2010-02-19 | 2011-09-01 | Icomes Labo:Kk | Linear motion device |
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