JPS6334045A - Ball screw device having multiple nuts - Google Patents
Ball screw device having multiple nutsInfo
- Publication number
- JPS6334045A JPS6334045A JP17383086A JP17383086A JPS6334045A JP S6334045 A JPS6334045 A JP S6334045A JP 17383086 A JP17383086 A JP 17383086A JP 17383086 A JP17383086 A JP 17383086A JP S6334045 A JPS6334045 A JP S6334045A
- Authority
- JP
- Japan
- Prior art keywords
- ball screw
- nuts
- screw shaft
- nut
- arc
- 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
- 230000000149 penetrating effect Effects 0.000 abstract 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000007689 inspection Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
- B23Q5/22—Feeding members carrying tools or work
- B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
- B23Q5/38—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously
- B23Q5/40—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding continuously by feed shaft, e.g. lead screw
Landscapes
- 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、工作機械の直線駆動装置に適用される複数ナ
ツト付ボールねじ駆動装置に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a ball screw drive device with multiple nuts applied to a linear drive device of a machine tool.
〈従来の技術〉
工作機械のテーブル、サドル、ヘッド等を直線駆動させ
る装置としてはボールねじ駆動装置が多用されている。<Prior Art> Ball screw drive devices are often used as devices for linearly driving tables, saddles, heads, etc. of machine tools.
しかしながら超高精度工作機械では次の様な問題点があ
った。However, ultra-high precision machine tools have the following problems.
〈発明が解決しようとする問題点〉
イ）高精度化のためには、ボールねじそのもののリード
精度を全長にわたり高精度に仕上げる必要があるが、そ
の精度に限界があると同時に高精度に仕上げるために要
する時間（検査に要する時間も含む）は莫大なものとな
って納期、コスト面で問題であった。<Problems to be solved by the invention> a) In order to achieve high precision, it is necessary to finish the lead precision of the ball screw itself to high precision over the entire length, but there is a limit to that precision, and at the same time it is necessary to finish it with high precision. The time required for this (including the time required for inspection) was enormous, creating problems in terms of delivery time and cost.
口） ２個のナツトをスペーサを介して取付けたボール
ねじ駆動装置もあるが、このスペーサの厚みは睨合調整
で作らざるを得ず製作組付時間に手間取る。また、この
装置ではナツトが互いに隣接しているため、ナツトを組
付けｔこ後のリード精度の向上率は少ない。There is also a ball screw drive device in which two nuts are attached via a spacer, but the thickness of this spacer must be made by adjusting the alignment, which takes time to manufacture and assemble. Further, in this device, since the nuts are adjacent to each other, the rate of improvement in lead accuracy after the nuts are assembled is small.
ル等の被駆動部を移動させろことのできろ複数ナツト付
ボールねじ駆動装置を提供することを目的とする。An object of the present invention is to provide a ball screw drive device with a plurality of nuts that can move driven parts such as wheels.
く問題点を解決するための手段〉
斯かる目的を達成する本発明の構成は複数のナツトを同
一のボールねじ軸に組み付けると共に前記複数のナツト
を互いに離して被駆動部に固定してなるボールねじ駆動
装置において、前記ナツトのフランジ部には、前記ボー
ルねじを中心とする円弧状の長穴が穿設され、該長穴を
貫通するボルトにより前記ナツトが前記被駆動部に締付
固定されることを特徴とする。Means for Solving the Problems> The present invention achieves the above object by assembling a plurality of nuts on the same ball screw shaft, and fixing the plurality of nuts to a driven part at a distance from each other. In the screw drive device, an arcuate long hole centered on the ball screw is bored in the flange portion of the nut, and the nut is tightened and fixed to the driven portion by a bolt passing through the long hole. It is characterized by
く作 用〉
ナツトが互いに離して組み付けたため、ボールねじ軸の
リード誤差が吸収されやすくなると同時にボールねじ駆
動系の剛性も向上する。Function: Since the nuts are assembled apart from each other, lead errors in the ball screw shaft are easily absorbed, and at the same time, the rigidity of the ball screw drive system is improved.
く実 施 例〉
以下、本発明の実施例について図面を参照して説明する
。Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１図及び第２図に本発明の一実施例を示す。両図に示
す実施例は、２個のナツトを使用した例である。即ち、
ボールねじ軸１は、その両端ｐ、ｑがヘッド等の機械本
体２に軸支されると共にモータ３により回動するように
なっている。このボールねじ軸１にナツト４．５が互い
に離して組み付けられる一方、このナツト４，５を固定
するためのフランジ６．７がテーブル等の被駆動部８に
突設されている。このフランジ６．７にはナツト４゜５
を固定するボルト９，１０の螺合する雌ねじが穿設され
ている。ナツト４，５のフランジ部には第２図に示すよ
うにボールねじ軸１を中心とする円弧状の長穴１１が４
か萌芽孔されており、これら長穴１１を貫通するボルト
９．１０により、ナツト４，５がフランジ６．７に締付
固定されている。フランジ６゜７とナツト４，５の締付
間の距離はそこそこの精度が出せても公差０μｍは困難
である。An embodiment of the present invention is shown in FIGS. 1 and 2. FIG. The embodiment shown in both figures is an example using two nuts. That is,
The ball screw shaft 1 is pivotally supported at both ends p and q by a machine body 2 such as a head, and is rotated by a motor 3. Nuts 4.5 are assembled to the ball screw shaft 1 at a distance from each other, and a flange 6.7 for fixing the nuts 4, 5 is provided protruding from a driven portion 8 such as a table. This flange 6.7 has a nut 4°5
Internal threads are provided for the screwing of bolts 9 and 10 for fixing. As shown in FIG. 2, the flange portions of the nuts 4 and 5 have four arc-shaped elongated holes 11 centered on the ball screw shaft 1.
Nuts 4 and 5 are fastened to the flange 6.7 by bolts 9.10 passing through these elongated holes 11. Even if a reasonable degree of accuracy can be achieved in the distance between the flange 6°7 and the tightened nuts 4 and 5, it is difficult to achieve a tolerance of 0 μm.
又、ナツト４，５のフランジ締付面もボールねじ軸１に
対し公差Ｏμｍは困難である。従って、ボルト９，１０
の貫通するナツト４゜５の穴が長穴１１となっているた
め、容易に無理なくナツト４，５？フランジ６．７に締
付固定することができる。Further, it is difficult for the flange tightening surfaces of the nuts 4 and 5 to have a tolerance of 0 μm with respect to the ball screw shaft 1. Therefore, bolts 9, 10
The hole at 4°5 that passes through the nut is the elongated hole 11, so you can easily and easily insert the nuts 4, 5, and 5. It can be fastened to the flange 6.7.
一方、ボールねじ軸１のピッチ誤差を第１図（ｂ）に示
すように、長手方向にわたり０μｍとすることは不可能
である・。例えば第１図（ｂｌに示すようなボールねじ
軸１があるとすると、Ｐ点を基準とすると、それぞれ単
独であれば、ナツト４は行きすぎた位置にあることにな
ゆ、逆にナツト５は行きたりないこととなる。ところが
本発明のようにナツト４，５をボールねじ軸１に沿わせ
て同時に移動させるようにすると、各ナツト４，５の位
置のピッチ誤差 ４の平均的な精度で被駆動部８を移動
できることとなり、従って、ボールねじ軸１の精度以上
の高精度とすることができる。On the other hand, as shown in FIG. 1(b), it is impossible to make the pitch error of the ball screw shaft 1 0 μm in the longitudinal direction. For example, if there is a ball screw shaft 1 as shown in FIG. However, if the nuts 4 and 5 are moved simultaneously along the ball screw shaft 1 as in the present invention, the pitch error in the position of each nut 4 and 5 is the average accuracy of 4. Therefore, the driven part 8 can be moved with a higher precision than that of the ball screw shaft 1.
更に、ナツトを３個以上とすると統計的に更に高精度駆
動系となる。Furthermore, when the number of nuts is three or more, the drive system becomes statistically more accurate.
〈発明の効果〉
以上、実施例に基づいて具体的に説明したように本発明
は次の効果を奏する。<Effects of the Invention> As described above in detail based on the embodiments, the present invention has the following effects.
イ） ボールねじ軸の長手方向の寸法がさほど高精度で
な（でも、ナツトの穴を長穴としたので複数個のナツト
を高精度に組付けられる。b) The longitudinal dimensions of the ball screw shaft are not very precise (but the nut holes are elongated holes, so multiple nuts can be assembled with high precision.
口） 複数個のナツトを互いに離して組付けるため、ボ
ールねじ軸の精度以上の精度で高精度に駆動することが
できる。Since multiple nuts are assembled apart from each other, they can be driven with high precision, exceeding the precision of the ball screw shaft.
八）高精度機ではボールねじ軸のピッチが細か（なるた
めに、ナツトの剛性が低下するが、複数個とすることに
より、その低下を補える。8) In high-precision machines, the pitch of the ball screw shaft is fine (as a result, the rigidity of the nut decreases, but by using multiple nuts, this decrease can be compensated for).
第１図及び第２図は本発明の一実施例に係り、第１図（
ａ）は本実施例のボールねじ駆動装置の断面図、第１図
（ｂ）はボールねじ軸の長手方向のピッチ誤差を示すグ
ラフ、第２図はナツトの正面図である。
図 面 中、
１はボールねじ軸、
２は機械本体、
３はモータ、
４．５はナラ ト、
６．７はブラケット、
８は被駆動部、
９．１０はボルト、
１１は長穴である。
特 許 出 願 人
三菱重工業株式会社
復 代 理 人1 and 2 relate to one embodiment of the present invention, and FIG.
FIG. 1(b) is a graph showing the pitch error in the longitudinal direction of the ball screw shaft, and FIG. 2 is a front view of the nut. In the drawing, 1 is the ball screw shaft, 2 is the machine body, 3 is the motor, 4.5 is the nut, 6.7 is the bracket, 8 is the driven part, 9.10 is the bolt, and 11 is the oblong hole. . Patent applicant: Mitsubishi Heavy Industries, Ltd., acting agent
Claims (1)
前記複数のナットを互いに離して被駆動体に固定してな
るボールねじ駆動装置において、前記ナットのフランジ
部には、前記ボールねじを中心とする円弧状の長穴が穿
設され、該長穴を貫通するボルトにより前記ナットが前
記被駆動体に締付固定されることを特徴とする複数ナッ
ト付ボールねじ駆動装置。In a ball screw drive device in which a plurality of nuts are assembled to the same ball screw shaft and fixed to a driven body at a distance from each other, a flange portion of the nut has a circle centered on the ball screw. A ball screw drive device with multiple nuts, characterized in that an arc-shaped elongated hole is bored, and the nut is tightened and fixed to the driven body by a bolt passing through the elongated hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17383086A JPS6334045A (en) | 1986-07-25 | 1986-07-25 | Ball screw device having multiple nuts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17383086A JPS6334045A (en) | 1986-07-25 | 1986-07-25 | Ball screw device having multiple nuts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6334045A true JPS6334045A (en) | 1988-02-13 |
Family
ID=15967946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17383086A Pending JPS6334045A (en) | 1986-07-25 | 1986-07-25 | Ball screw device having multiple nuts |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6334045A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5549014A (en) * | 1992-03-05 | 1996-08-27 | Black & Decker Inc. | Workcentre |
-
1986
- 1986-07-25 JP JP17383086A patent/JPS6334045A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5549014A (en) * | 1992-03-05 | 1996-08-27 | Black & Decker Inc. | Workcentre |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH04164540A (en) | Ball screw guide unit and transfer table using it | |
| JPS6125706A (en) | Bench for hand drill machine | |
| JPS60232837A (en) | Screwing device | |
| US11597021B2 (en) | Hobbing machine, comprising a hobbing slide and a chamfering slide on a common rail system | |
| WO2002040947A9 (en) | Position measuring system and method for the assembly thereof | |
| JPS6334045A (en) | Ball screw device having multiple nuts | |
| US4630944A (en) | Gib for machine tool | |
| EP0533973B1 (en) | Angle measuring device | |
| JP2816324B2 (en) | Linear guide positioning structure | |
| WO2002051694A1 (en) | Device for connecting support pipes and modular gripper system which uses this device | |
| JPH0238741A (en) | Backlashless feed screw | |
| US20130219678A1 (en) | Clamping And Sliding Device For Polygonal Shaft | |
| DE2440303A1 (en) | DEVICE FOR DISPLAYING THE ANGLE POSITION OF A ROTATING COMPONENT IN RELATION TO A FIXED COMPONENT | |
| JP3080252B2 (en) | Linear actuation unit | |
| JPH062073Y2 (en) | Rack and pinion transmission | |
| JPH051765Y2 (en) | ||
| JP2603645Y2 (en) | Linear actuation unit | |
| JPS6114727Y2 (en) | ||
| JP2000240750A (en) | Coupling and moving table unit using it | |
| JPS6228365Y2 (en) | ||
| JP2865407B2 (en) | Assembling method of feeder | |
| US8317399B2 (en) | Linear motion device comprising rotatably adjustable flange | |
| JPS6159020A (en) | Reamer bolt clamping device | |
| JPS61248955A (en) | Linear drive unit | |
| JPH10108400A (en) | Motor bracket, method of making hole for attaching the motor bracket, and its jig |