JPS6035580B2 - Non-circulating ball screw - Google Patents
Non-circulating ball screwInfo
- Publication number
- JPS6035580B2 JPS6035580B2 JP56063238A JP6323881A JPS6035580B2 JP S6035580 B2 JPS6035580 B2 JP S6035580B2 JP 56063238 A JP56063238 A JP 56063238A JP 6323881 A JP6323881 A JP 6323881A JP S6035580 B2 JPS6035580 B2 JP S6035580B2
- Authority
- JP
- Japan
- Prior art keywords
- ball
- spring
- screw
- balls
- nut
- 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
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
- 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
-
- 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
- F16H25/2209—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with arrangements for taking up backlash
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Description
【発明の詳細な説明】
この発明は、ボールがナットの内周面に移動できないよ
うに保持されている非循環式ボールねじに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a non-circulating ball screw in which balls are held immovably on the inner peripheral surface of a nut.
この種のボールねじは、ねじ軸のねじ溝に適合すべきね
じ溝をナット側に設ける必要がないので、工作が比較的
容易であり、フロッピーディスク装置における磁気ヘッ
ドの送り等負荷の小さいものに利用されている。This type of ball screw does not require a thread groove on the nut side that matches the thread groove on the screw shaft, so it is relatively easy to work with, and is suitable for applications with small loads such as feeding the magnetic head in a floppy disk drive. It's being used.
この非循環式ボールねじのバックラッシュを小さくする
ために、ボールをスプリングで軸心に付勢したものが従
来知られている。In order to reduce the backlash of this non-circulation type ball screw, a type in which the balls are biased toward the shaft center by a spring is conventionally known.
しかしこの種のものは、構造が複雑になるのでボールの
数を多くするのが難しく、極めて小さな軸荷重しか担う
ことができないという問題があった。この発明は、この
ような問題を解消できる新たな構造のボールねじを得る
ことを目的とする。すなわちこの発明によれば、特許請
求の範囲に記載されるようなボールねじが得られる。こ
の発明のボールねじによれば、ねじ軸とボール押えの間
が狭められるので、ボールはねじ軸のねじ満面とボール
押えの内端凹面にそれぞれ接触し、軸方向のすきまがな
くなるので、このすきまに基づくバックラッシュを除去
することができる。そして特に、ボール押えの内端にボ
ールが係合する円すし・状の凹部を形成したので、ボー
ル押えに対しボールが偏りにくく、大きな鞠荷重の下で
もバックラッシュが生じにくい。しかも、複数のボール
を一本のコイルコイルスプリングで付勢するようにした
ので、ボールの数を増して許容荷重を大きくすることが
極めて容易にできるという効果がある。以下この発明の
一実施例を図面にしたがって説明する。However, this type of ball has a complicated structure, making it difficult to increase the number of balls, and has the problem that it can only support a very small axial load. The object of the present invention is to obtain a ball screw with a new structure that can solve these problems. That is, according to the present invention, a ball screw as described in the claims can be obtained. According to the ball screw of this invention, since the space between the screw shaft and the ball holder is narrowed, the balls come into contact with the full thread surface of the screw shaft and the concave inner end surface of the ball holder, eliminating the axial clearance. backlash based on can be removed. In particular, since a circular concave portion into which the ball engages is formed at the inner end of the ball presser, the ball is less likely to be biased against the ball presser, and backlash is less likely to occur even under a large ball load. Furthermore, since a plurality of balls are biased by a single coil spring, there is an effect that it is extremely easy to increase the allowable load by increasing the number of balls. An embodiment of the present invention will be described below with reference to the drawings.
１はねじ軸であって、そのまわりもこはねじ溝２が刻設
されている。このねじ溝の横断図形状は、交さ曲線また
は直線からなる略Ｖ字形、または半円形とすることがで
きる。他方、ナット３の内周には、一般のものと異なり
、ねじ溝がなく、代りもこ、ねじ軸のねじ溝２に対応す
るつる巻き線上に間隔を置いて、半径方向に複数の貫通
孔４が穿設されている。Reference numeral 1 denotes a screw shaft, around which a screw groove 2 is also carved. The cross-sectional shape of this thread groove can be approximately V-shaped consisting of intersecting curves or straight lines, or semicircular. On the other hand, the inner circumference of the nut 3 does not have a thread groove, unlike a general nut, but instead has a plurality of through holes 4 in the radial direction at intervals on the helical wire corresponding to the thread groove 2 of the screw shaft. is drilled.
この孔には円柱状のボ−ル押え５が摺動自在に鉄装され
ている。このボール押えの内端とねじ軸の溝面の間にス
チールボール７が介在される。ボール押え５の内端には
、ボールが係合する円すし、状の凹部６が形成されてい
る。前記ナット３の外周には、前記孔４と交わるよう螺
旋状にスプリング溝８が刻設してあり、この溝に沿って
コイルスプリング９が引き伸ばした状態で懸回されてい
る。A cylindrical ball holder 5 is slidably fitted with iron in this hole. A steel ball 7 is interposed between the inner end of the ball holder and the groove surface of the screw shaft. The inner end of the ball presser 5 is formed with a concave portion 6 in the shape of a cone, into which the ball engages. A spring groove 8 is spirally carved on the outer periphery of the nut 3 so as to intersect with the hole 4, and a coil spring 9 is suspended in an expanded state along this groove.
スプリング溝８の中にわずかに突出するボール押え５は
、このスプリング９の収縮力によって軸心に向け付勢さ
れる。このように構成されたボールねじにおいては、ボ
ール押え５に軸○‘こ向け付勢したので、ボール押えと
ねじ軸１の間が狭められ、ボールはねじ軸の溝面とボー
ル押えの凹面のそれぞれ強く押し付けられる。The ball presser 5, which slightly protrudes into the spring groove 8, is urged toward the axis by the contraction force of the spring 9. In the ball screw configured in this way, since the ball holder 5 is biased toward the axis ○', the distance between the ball holder and the screw shaft 1 is narrowed, and the balls are pushed between the groove surface of the screw shaft and the concave surface of the ball holder. Each is strongly pressed.
この結果、軸方向におけるすきまがなくなり、これによ
って生ずるバックラッシュは除去される。As a result, there is no clearance in the axial direction, and the backlash caused by this is eliminated.
図面はこの発明の好ましい実施例を示し、第１図はボー
ルねじの縦断面図、第２図は同じボールねじのねじ溝に
沿った横断面図である。
１……ねじ軸、２……ねじ溝、３……ナット、４・・・
・・・孔、５・・・・・・ボール押え、６・・・・・・
凹部、７・・・…ボール、９……コイルスプリング。
第１図
第２図The drawings show a preferred embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of a ball screw, and FIG. 2 is a cross-sectional view of the same ball screw along a thread groove. 1...Screw shaft, 2...Thread groove, 3...Nut, 4...
...Hole, 5...Ball holder, 6...
Recess, 7...Ball, 9...Coil spring. Figure 1 Figure 2
Claims (1)
面に半径方向に穿設された孔に保持されており、前記ボ
ールを軸心に向けて付勢するスプリングを備えているボ
ールねじにおいて、前記孔が複数あり、それぞれの孔の
中に前記ボールが保持されており、前記スプリングが前
記ナツトの外周にきつく巻き付けられたコイルスプリン
グであり、外端がこのスプリングに、また内端が前記ボ
ールに当接するボール押えが前記各孔の中に摺動自在に
嵌合されており、これらボール押えの内端は前記ボール
が係合する円すい状の凹部を有していることを特徴とす
る非循環式ボールねじ。1 A ball that engages with the thread groove of the screw shaft is held in a hole drilled in the radial direction on the inner peripheral surface of the nut, and is equipped with a spring that biases the ball toward the shaft center. The screw has a plurality of holes, each of which holds the ball, and the spring is a coil spring tightly wound around the outer circumference of the nut, with an outer end connected to the spring and an inner end connected to the spring. Ball holders that come into contact with the balls are slidably fitted into each of the holes, and inner ends of these ball holders have conical recesses into which the balls engage. Non-circulating ball screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56063238A JPS6035580B2 (en) | 1981-04-28 | 1981-04-28 | Non-circulating ball screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56063238A JPS6035580B2 (en) | 1981-04-28 | 1981-04-28 | Non-circulating ball screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57179463A JPS57179463A (en) | 1982-11-05 |
| JPS6035580B2 true JPS6035580B2 (en) | 1985-08-15 |
Family
ID=13223433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56063238A Expired JPS6035580B2 (en) | 1981-04-28 | 1981-04-28 | Non-circulating ball screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6035580B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3421273C2 (en) * | 1983-06-11 | 1987-01-22 | Aisin Seiki K.K., Kariya, Aichi | Shaft bushing unit |
| US5303606A (en) * | 1993-04-15 | 1994-04-19 | Kokinda Mark A | Anti-backlash nut having a free floating insert for applying an axial force to a lead screw |
| JP4743705B2 (en) * | 2006-01-17 | 2011-08-10 | 株式会社長谷工コーポレーション | Ventilation register |
| WO2008013150A1 (en) * | 2006-07-24 | 2008-01-31 | Thk Co., Ltd. | Screw device and motion guide device |
| JP2008045577A (en) * | 2006-08-10 | 2008-02-28 | Kss Kk | Non-circulating ball screw |
| US20100006302A1 (en) * | 2008-07-11 | 2010-01-14 | Baker Hughes Incorporated | Locking arrangement to store setting forces |
| KR101355319B1 (en) * | 2012-12-20 | 2014-01-24 | 현대위아 주식회사 | Bearing screw type transferring |
| JP6278374B2 (en) * | 2016-04-26 | 2018-02-14 | 理宝株式会社 | Nut attachment, nut assembly and feed screw device |
| JP2021110448A (en) * | 2019-12-30 | 2021-08-02 | 理宝株式会社 | Actuator and sliding switchgear |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4826380U (en) * | 1971-08-07 | 1973-03-29 | ||
| JPS56147956A (en) * | 1980-04-15 | 1981-11-17 | Norco Inc | Low friction mechanical transmission for converting rotating motion to linear motion |
-
1981
- 1981-04-28 JP JP56063238A patent/JPS6035580B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57179463A (en) | 1982-11-05 |
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