JPS60227053A - Ball screw device - Google Patents
Ball screw deviceInfo
- Publication number
- JPS60227053A JPS60227053A JP8297384A JP8297384A JPS60227053A JP S60227053 A JPS60227053 A JP S60227053A JP 8297384 A JP8297384 A JP 8297384A JP 8297384 A JP8297384 A JP 8297384A JP S60227053 A JPS60227053 A JP S60227053A
- Authority
- JP
- Japan
- Prior art keywords
- nut
- screw
- balls
- groove
- ball 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.)
- Granted
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
- F16H25/2214—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls with elements for guiding the circulating 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】
本発明は測定装置のテーブルの移動機構などに使用され
ているボールねじ装置に関し、特に玉を介して、ｌ対の
半割りナツトをねじ軸に螺合させたボールねじ装置に係
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ball screw device used in a table moving mechanism of a measuring device, and more particularly to a ball screw device in which a pair of half-split nuts are screwed onto a screw shaft through balls. Related to equipment.
一般の測定装置などにおいて、送りねじ装置に半割りナ
ツトを使用して送りを自動または手動に切替え可能な機
構は古くから知られている。即ち、この種の送りねじ装
置は半割りナツトを閉じてねじ軸に螺合しているとき自
動送りを行い、半割りナツトを半径方向に開いて螺合状
態から解放されたとき手動送りができるようになってい
る。BACKGROUND ART In general measuring devices, a mechanism that uses a half-split nut in a feed screw device to switch the feed between automatic and manual has been known for a long time. In other words, this type of feed screw device performs automatic feeding when the half-split nut is closed and screwed onto the screw shaft, and can perform manual feeding when the half-split nut is opened in the radial direction and released from the screwed state. It looks like this.
送りねじ装置としてボールねじ装置を使用し、半割りナ
ツト方式にした場合には、半割りナツトを半径方向に開
いて螺合状態から解放したときに玉がねじみぞから脱落
する。従って、半割りナツト方式のボールねじ装置は玉
の脱落防止が必要であるけれども、玉の保持手段に困難
があった。When a ball screw device is used as the feed screw device and a half nut system is used, the balls fall out of the screw groove when the half nut is opened in the radial direction and released from the screwed state. Therefore, although it is necessary to prevent the balls from falling off in the half-nut type ball screw device, it is difficult to find a means for holding the balls.
また、従来のボールねじ装置が半割りナツト方式でない
場合には、例えばテーブルを任意の位置から自動送りさ
せたいとき、その任意の位置ヘテーブルを移動させる必
要がある。このようなとき、変速された自動早送り手段
を使用した場合でも作業性が悪いと云う欠点があって実
用的な半割りナツト方式のボールねじ装置の出現が待望
されていた。Further, if the conventional ball screw device is not of the half-split nut type, for example, when it is desired to automatically feed the table from an arbitrary position, it is necessary to move the table to the arbitrary position. In such cases, even when a speed-changed automatic rapid-forwarding means is used, there is a drawback that workability is poor, so the appearance of a practical half-nut type ball screw device has been long awaited.
本発明は前述の欠点を解決するためのもので、ねじみぞ
を有するねじ軸と、ねじみぞに転動する複数個の玉と、
この玉を介してねじ軸に螺合する７ナツトとからなるボ
ールねじ装置において、玉の循環路を設け、軸方向の面
で分割されて形成されねじ軸のねじみぞの谷底に形成さ
れた逃げみぞとを備えた特徴をもつことにより、ねじ軸
に螺合する半割りナツトを半径方向に開閉着脱を行って
も玉の脱落がなく、簡単な構造で、しかも移動機構の早
送り手段に有用なボールねじ装置を得ることを目的とす
る。The present invention is intended to solve the above-mentioned drawbacks, and includes a screw shaft having a thread groove, a plurality of balls rolling in the thread groove,
In a ball screw device consisting of seven nuts that are screwed onto the screw shaft through the balls, a circulation path for the balls is provided, and a recess is formed by being divided in the axial direction and formed at the bottom of the thread groove of the screw shaft. Due to the grooved feature, the ball does not fall off even when the half-split nut screwed onto the screw shaft is opened/closed/detached in the radial direction.It has a simple structure and is useful as a rapid feed means of a moving mechanism. The purpose is to obtain a ball screw device.
本発明のボールねじ装置の実施例について、以下図面に
もとすいて説明する。Embodiments of the ball screw device of the present invention will be described below with reference to the drawings.
第１図において、１はボールねじ装置で、ボールねじ装
置１にはねじ軸２とナツト３とがあり、ねじ軸２の外円
面にはねじみぞ４が形成されている。ナツト３はナツト
３の軸方向の面で２分割された１対の半割りナラ）３ａ
、３ｂで形成されてい・る半割りナラ）３ａの内面には
ねじみぞ７が形成され部分に円弧状の線状部８があり、
線状部８によっ１じ９などの手段で半割りナラ）３ａに
固設されてい ゛る。In FIG. 1, 1 is a ball screw device, and the ball screw device 1 has a screw shaft 2 and a nut 3, and a screw groove 4 is formed on the outer circular surface of the screw shaft 2. The nut 3 is a pair of half-split nuts divided into two on the axial surface of the nut 3) 3a
, 3b) A threaded groove 7 is formed on the inner surface of 3a, and an arcuate linear portion 8 is formed on the inner surface of 3a.
It is fixedly attached to the half-split oak (3a) by the linear portion 8 by means such as 1-9.
また、各半割りナラ）３ａ、３ｂＫは第３図に示すよう
に玉５が循環するための循環路１０が設けられている。Further, each half-split oak) 3a, 3bK is provided with a circulation path 10 through which the balls 5 circulate, as shown in FIG.
循環路１０は半割りナツトのねじみぞ７に連接する附近
で、転動する玉５が円渭（（ねじみぞ７に対し供給また
は排出が可能なように曲線循環路１１が形成されている
。A curved circulation path 11 is formed in the vicinity of the circulation path 10 connected to the threaded groove 7 of the halved nut so that the rolling balls 5 can be supplied or discharged from the threaded groove 7.
ねじ軸２は第４図に示すように、ねじ軸のねじみぞ４の
谷底部分に逃げみぞ１２が形成されている。逃げみぞ１
２は玉５が保持された半割りナラ）３ａ線状部８が当接
しないように形成されている。線状部８の断面形状は四
角形状に限定するものでなく半割りナツトのねじみぞ７
に玉５が保持可能ならば円形またはその他の形状でもよ
い。As shown in FIG. 4, the screw shaft 2 has a relief groove 12 formed at the bottom of the thread groove 4 of the screw shaft. Escape groove 1
2 is a half-split oak in which the ball 5 is held) 3a is formed so that the linear portion 8 does not come into contact with it. The cross-sectional shape of the linear portion 8 is not limited to a rectangular shape, but may be a threaded groove 7 of a half-split nut.
It may be circular or any other shape as long as the ball 5 can be held therein.
以上のように構成されたボールねじ装置は、ナツト３が
１対の半割りナラ）３ａ、３ｂで形成されているので、
各半割りナラ）３ａ、３ｂは半径方向にそれぞれ移動さ
せて開閉することができる。半割りナラ）３ａ、３ｂけ
ねじ軸２に対し螺合状態にあるときは第４図のようにな
り、ねじ軸２から半径方向リナット３ａ、３ｂから脱落
しないようになっている□。また、ねじ軸２に対し半割
りナラ）３ａ、３ｂが閉じて螺合した状態で、ねじ軸２
を回転させると玉５はねじ軸２および半割りナラ）３ａ
、３ｂの各ねじみぞ４．７面を転動し、半割りナツト３
ａ、３ｂＫ設けられた循環路１０内を循環するようにな
る。In the ball screw device configured as described above, since the nut 3 is formed of a pair of half-split nuts 3a and 3b,
Each half-split oak) 3a, 3b can be moved in the radial direction to open and close. When the half-split nuts 3a and 3b are screwed into the screw shaft 2, they become as shown in FIG. 4, and are designed not to fall off from the screw shaft 2 from the radial re-nuts 3a and 3b. In addition, when the half-split nuts 3a and 3b are closed and screwed together with the screw shaft 2,
When rotated, the ball 5 is connected to the screw shaft 2 and the half-split nuts) 3a.
, 3b each screw groove 4. Roll on the 7th surface, half nut 3
The water circulates in the circulation path 10 provided with a and 3bK.
第６図は他の実施例を示したもので、ねじ軸２にナツト
３を螺合させ、ナツト３は２組の半割りナツト３ａ、
３ｂ、１３ａ、Ｌ３ｂと１対の中間部材１４ａ、Ｌ４ｂ
とで形成されている。ナツト３の下ＩＩＩ ８分は下側
中間部材１４ａおよび下側中間部材１４ａの左右の下側
半割りナラ）３ａ、Ｌ３ａが連結され、ナツト３の上側
部分も同様に中間部材Ｌ４ｂと半割りナツト３ａ、１３
ａとが連結されている。このように構、！されたボール
ねじ装置は１対のみの半割りナツト′を使用した場合に
比較して大きな負荷容量が得られる。また、詳説するま
でもなく、中間部材を使用しないで２組の半割りナツト
のみでナツトを構成することも可能である。FIG. 6 shows another embodiment, in which a nut 3 is screwed onto the screw shaft 2, and the nut 3 consists of two sets of half-split nuts 3a,
3b, 13a, L3b and a pair of intermediate members 14a, L4b
It is formed by. The lower part of the nut 3 (III 8) is connected to the lower intermediate member 14a and the left and right lower halves of the lower intermediate member 14a) 3a, L3a are connected, and the upper part of the nut 3 is also connected to the intermediate member L4b and the half nut. 3a, 13
a is connected. Structured like this! The ball screw device thus constructed has a larger load capacity than when using only one pair of half-split nuts. Further, it is not necessary to explain in detail, but it is also possible to construct the nut using only two sets of half-split nuts without using an intermediate member.
前述したように本発明のボールねじ装置はねじみぞを有
するねじ軸と、ねじみぞに転動する複数個の玉と、この
玉を介してねじ軸に螺合するナツトとから形成されたも
のにおいて、玉の循環路を設け、軸方向の面で分割され
て形成された少なくねじみその谷底に形成された逃げみ
ぞとを備えた特徴を有することによって、ねじ軸に螺合
する半割りナツトを半径方向に開閉着脱を行っ又も玉の
脱落がなく、構造が簡単で、かつ低床なコストで、測定
機の位置決め装置などの移動機構の早送り手段に有効に
利用できるなど多くの効果が得られ全ぺAs mentioned above, the ball screw device of the present invention includes a screw shaft having a threaded groove, a plurality of balls that roll in the threaded groove, and a nut that is screwed onto the screw shaft through the balls. By providing a circulation path for the balls and having relief grooves formed at the bottom of the threaded holes that are divided in the axial direction, the half-split nuts that are screwed onto the threaded shafts can be used. It can be opened and removed in the radial direction, and the ball does not fall off. It has a simple structure, low cost, and can be effectively used as a fast-forwarding means for moving mechanisms such as measuring machine positioning devices. All pages
第１図ない１−第６図は本発明のボールねじ装置の実施
例を示し、第１図は要部正面図、第２図は第１図のＡ−
Ａ線において矢印方向に見た半割りナツトの平面図、第
３図は第２図のＢ−Ｂ線における断面図、第４図は螺合
状態を説明する吸部拡大断面図、第５図は螺合状態が解
放されたときを説明する要部拡大断面図、第６図は他の
実施例を示した吸部正面図である。
符号の説明
■・・・・・・ポールねじ装置、２・・・・・・ねじ軸
、３・・・・・・ナツト、：３ａ、 ３ｂ、 １３ａ、
Ｖ３ｂ−・−・−半割りナツト、４．７・・・・・・
ねじみぞ、５・・・・・・玉、６・・・・・・線状保持
型、１０・・・・・・循環路、１２・・・・・・逃げみ
ぞ。
草２１ヨ 草３１刀1-6 show an embodiment of the ball screw device of the present invention, FIG. 1 is a front view of the main part, and FIG. 2 is A-6 of FIG.
A plan view of the half-split nut taken along line A in the direction of the arrow; FIG. 3 is a sectional view taken along line B-B in FIG. 2; FIG. FIG. 6 is an enlarged cross-sectional view of the main part for explaining when the screwed state is released, and FIG. 6 is a front view of the suction part showing another embodiment. Explanation of symbols ■... Pole screw device, 2... Screw shaft, 3... Nut, : 3a, 3b, 13a,
V3b---Half-split nut, 4.7...
Screw groove, 5...Ball, 6...Linear holding type, 10...Circulation path, 12...Escape groove. grass 21yo grass 31 sword
Claims (1)
動する複数個の玉と、この玉を介して前記ねじナツトを
軸方向の面で分割して形成された少なくともｌ対の半割
りナツトと、この半割りナツトの１〕 ねじみぞに前記上を保持する線状保持＼と、前記ねじ軸
のねじみぞの谷底に形成された逃げみぞとを備えたこと
を特徴としたボールねじ装置。(1) A screw shaft having a threaded groove, a plurality of balls rolling in the threaded groove, and at least l pairs of halves formed by dividing the screw nut in the axial direction via the balls. Nut and this half-split nut 1] A ball screw device comprising a linear retainer for holding the upper portion in a threaded groove, and an relief groove formed at the bottom of the threaded groove of the screw shaft. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8297384A JPS60227053A (en) | 1984-04-26 | 1984-04-26 | Ball screw device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8297384A JPS60227053A (en) | 1984-04-26 | 1984-04-26 | Ball screw device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60227053A true JPS60227053A (en) | 1985-11-12 |
| JPH0480261B2 JPH0480261B2 (en) | 1992-12-18 |
Family
ID=13789155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8297384A Granted JPS60227053A (en) | 1984-04-26 | 1984-04-26 | Ball screw device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60227053A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009275918A (en) * | 2009-08-24 | 2009-11-26 | Mitsubishi Heavy Industries Plastic Technology Co Ltd | Ball screw |
| JP2016176507A (en) * | 2015-03-19 | 2016-10-06 | Thk株式会社 | Ball screw device and nut member |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3726510B2 (en) * | 1998-01-06 | 2005-12-14 | 日本精工株式会社 | Ball screw |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3577796A (en) * | 1968-08-13 | 1971-05-04 | Nirona Werke Kg | Spindle guide |
| JPS58211062A (en) * | 1982-06-01 | 1983-12-08 | Hitachi Medical Corp | Moving device of bed |
-
1984
- 1984-04-26 JP JP8297384A patent/JPS60227053A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3577796A (en) * | 1968-08-13 | 1971-05-04 | Nirona Werke Kg | Spindle guide |
| JPS58211062A (en) * | 1982-06-01 | 1983-12-08 | Hitachi Medical Corp | Moving device of bed |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009275918A (en) * | 2009-08-24 | 2009-11-26 | Mitsubishi Heavy Industries Plastic Technology Co Ltd | Ball screw |
| JP2016176507A (en) * | 2015-03-19 | 2016-10-06 | Thk株式会社 | Ball screw device and nut member |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0480261B2 (en) | 1992-12-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |