JP4732263B2 - Ball screw lubrication seal device - Google Patents

Ball screw lubrication seal device Download PDF

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JP4732263B2
JP4732263B2 JP2006200241A JP2006200241A JP4732263B2 JP 4732263 B2 JP4732263 B2 JP 4732263B2 JP 2006200241 A JP2006200241 A JP 2006200241A JP 2006200241 A JP2006200241 A JP 2006200241A JP 4732263 B2 JP4732263 B2 JP 4732263B2
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ball screw
small holes
screw nut
frame body
seal ring
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JP2008025749A (en
JP2008025749A5 (en
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喜実 岩崎
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Kuroda Precision Industries Ltd
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Kuroda Precision Industries Ltd
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Description

本発明は、ボールねじの潤滑シール装置に係り、特にボールねじ装置における、ねじ転動部であるねじ軸のねじ溝とボール間、ボールねじナットのねじ溝とボール間の潤滑を、長期間油を補給せずに使用可能な潤滑シール装置に関する。   The present invention relates to a ball screw lubrication seal device, and in particular, in a ball screw device, lubrication between a thread groove of a screw shaft, which is a screw rolling portion, and a ball, and lubrication between a thread groove of a ball screw nut and a ball for a long time. The present invention relates to a lubricating seal device that can be used without replenishing.

従来、この種のボールねじの潤滑シール装置は、例えば特許文献1に記載されたような構造が知られている。このボールねじの潤滑シール装置は、ねじ軸のねじ溝の軸直角断面形状に対応した孔を有する薄板シール板を円周方向にずらせて重ね合わせ、枠形リングに保持されてボールねじナットの端部に取り付けているが、密封装置すなわちシール装置としての機能しかなく、長期間油を補給せずに使用することはできなかった。   Conventionally, this type of ball screw lubrication seal device has been known to have a structure as described in Patent Document 1, for example. In this ball screw lubrication seal device, the thin plate seal plates having holes corresponding to the cross-sectional shape perpendicular to the axis of the screw groove of the screw shaft are overlapped in the circumferential direction, and held by the frame-shaped ring to end the ball screw nut. Although it was attached to the part, it had only a function as a sealing device, that is, a sealing device, and could not be used without replenishing oil for a long time.

また、特許文献2や特許文献3に示されたような潤滑機構も公知である。
前者は、潤滑剤含有のゴムまたは合成樹脂リングをボールねじナットの端部に押え部材で取り付けて、その押え部材の突起部で合成樹脂リングの周方向に予圧を掛けるように構成している。すなわち、常時潤滑剤供給部材を接触する転動体であるボールへ押圧力を加えることによって、接触状態を長時間保持するものである。従って、潤滑機構が複雑化する。
Also, lubrication mechanisms such as those disclosed in Patent Document 2 and Patent Document 3 are known.
The former is configured such that a rubber or synthetic resin ring containing a lubricant is attached to an end of a ball screw nut with a pressing member, and a preload is applied in the circumferential direction of the synthetic resin ring by a protruding portion of the pressing member. That is, the contact state is maintained for a long time by applying a pressing force to the ball, which is a rolling element that always contacts the lubricant supply member. Therefore, the lubrication mechanism becomes complicated.

また後者は、前者と同様にボールねじナット等スライド部材に装着されるので、潤滑油を塗布する部材が明細書に記載されたように、ウール混合ポリエステル製フェルトや焼結樹脂等から構成され、潤滑剤をより多量に吸収保持できる。このような装置においては、多量に吸収保持が可能でも、転動体つまりボールへ接触して油を付着させていく際、常時その作用をさせるために、この部材へ油を供給するための潤滑油吸蔵体(タンク機能)を付加させている。しかも、油を保持する潤滑油を塗布する部材のボールとの接触部は、時間を追う毎に弾性を失い塑性変形を起して、転動ボールとの接触状態が悪化し、潤滑作用が低下してしまう。また、通常のフェルト材は空隙が大きいので、吸収した油も流れ出やすく、従って、明細書に記載されているように、吸蔵体と塗布体との間に流量制御弁を設ける等の工夫が必要となる。
Moreover, since the latter is mounted on a slide member such as a ball screw nut as in the former, the member to which the lubricating oil is applied is composed of a wool-mixed polyester felt or a sintered resin, as described in the specification, A large amount of lubricant can be absorbed and retained. In such a device, even if a large amount of oil can be retained, the lubricating oil for supplying oil to this member is always used when the oil is adhered to the rolling elements, that is, the balls. An occlusion body (tank function) is added. In addition, the contact portion of the member that applies the lubricating oil that retains the oil with the ball loses its elasticity with time and causes plastic deformation, which deteriorates the contact state with the rolling ball and reduces the lubricating action. Resulting in. Also, since the normal felt material has a large gap, the absorbed oil is also likely to flow out. Therefore, as described in the specification, a device such as a flow control valve is required between the occlusion body and the application body. It becomes.

このような状況に鑑みて、本発明者は、特許文献4および特許文献5に示す構造を提案した。これらの発明は、潤滑構造の簡便化、より多くの潤滑剤を保持して長期間安定した潤滑剤給油を可能とするメリットを有しており、実用化されている。
実公平5−43310号公報 特開平10−2395号公報 特許第3288961号公報 特開2005−155701号公報 特開2005−155702号公報
In view of such a situation, the present inventor has proposed the structures shown in Patent Document 4 and Patent Document 5. These inventions have the advantages of simplifying the lubrication structure and enabling more stable lubricant supply for a long period of time by holding more lubricant.
Japanese Utility Model Publication No. 5-43310 Japanese Patent Laid-Open No. 10-2395 Japanese Patent No. 3288961 JP 2005-155701 A JP-A-2005-155702

しかし、特許文献4および特許文献5に示す構造においては、ボールねじナットあるいはねじ軸へ取り付ける際の位置合わせが容易にできなかった。また、潤滑シール装置をボールねじナットの端面への取り付けが接着によるため、交換等が容易にできなかった。
そこで、ボールねじナットへの位置合わせが確実にでき、しかも未経験者でも容易に組み付け作業ができる構造の実現が期待されていた。
However, the structures shown in Patent Document 4 and Patent Document 5 cannot be easily aligned when attached to a ball screw nut or a screw shaft. Further, since the lubrication seal device is attached to the end face of the ball screw nut by adhesion, replacement or the like cannot be easily performed.
Therefore, it has been expected to realize a structure that can be reliably aligned with the ball screw nut and can be easily assembled even by an inexperienced person.

本発明は、斯かる従来の問題点を解決するために為されたもので、その目的は、ねじ軸のねじ溝とシール内面の位相合わせが容易で、ボールねじナットへの取り付けが確実でかつ容易であるボールねじの潤滑シール装置を提供することにある。   The present invention has been made to solve such a conventional problem, and its purpose is that phase alignment of the thread groove of the screw shaft and the seal inner surface is easy, and the mounting to the ball screw nut is reliable. It is an object of the present invention to provide a ball screw lubricating seal device that is easy.

本発明に係るボールねじの潤滑シール装置は、ねじ軸と、両端部に複数のねじ穴を設け、前記ねじ軸の外周に螺合されるボールねじナットと、周縁部に貫通する複数の小穴を設け、前記ボールねじナットの両端面にそれぞれ当接する環状外枠体と、周縁部に貫通する複数の小穴を設け、前記環状外枠体内に嵌まり合う環状内枠体と、周縁部に貫通する複数の小穴を設け、潤滑剤を含浸保持し、内径を前記ねじ軸の軸直角断面形状に見合う形状として前記環状内枠体内に内装保持されるシールリングと、前記シールリングを内装保持した前記環状内枠体を嵌め込んで前記ボールねじナットの両端面にそれぞれ当接する前記環状外枠体を、前記環状内枠体、前記シールリングおよび前記環状外枠体の各周縁部に設けた複数の小穴を介して前記ボールねじナットの両端面のねじ穴に螺着することによって固定するボルトとを備え、前記環状外枠体、前記環状内枠体および前記シールリングに設けた複数の小穴は、それぞれ直径方向に対向して設けられるとともに、それぞれの前記小穴の一方の穴位置の位相をずらすことによって、前記ボールねじナットの端面の非対称位置に形成され、前記環状内枠体および前記シールリングの複数の小穴は、前記ボルトの頭が挿通できる大きさに設定され、前記シールリングは、前記ボルトの頭部により位置決めされていることを特徴とする。 A lubrication and seal device for a ball screw according to the present invention includes a screw shaft, a plurality of screw holes at both ends, a ball screw nut that is screwed onto the outer periphery of the screw shaft, and a plurality of small holes that penetrate the peripheral portion. An annular outer frame body that abuts on both end faces of the ball screw nut, a plurality of small holes that penetrate the peripheral edge portion, an annular inner frame body that fits within the annular outer frame body, and a peripheral edge portion. Provided with a plurality of small holes, impregnated and retained with a lubricant, the seal ring is internally held in the annular inner frame with an inner diameter corresponding to the cross-sectional shape perpendicular to the axis of the screw shaft, and the ring having the seal ring held internally A plurality of small holes provided in each peripheral portion of the annular inner frame, the seal ring, and the annular outer frame, the annular outer frame being fitted into the inner frame and abutting against both end faces of the ball screw nut, respectively. Through said Bo And a bolt for fixing by screwing into the screw holes in the end faces of the screw nut, said annular outer frame, a plurality of small holes provided in the annular frame and the sealing ring, respectively diametrically opposed And is formed at an asymmetrical position of the end surface of the ball screw nut by shifting the phase of one hole position of each of the small holes. The bolt head is set to a size that can be inserted, and the seal ring is positioned by the bolt head .

1.潤滑シール装置をボールねじナットにボルトで装着するようにしたので、装着が簡単でメンテナンスも容易である。
2.シールリングをボルトの頭部で位置固定するとともに、嵌合とすることで、潤滑剤をねじ内に保持することができ、より長期間のメンテナンスフリーが達成できる。
1. Since the lubrication seal device is attached to the ball screw nut with a bolt, it is easy to install and easy to maintain.
2. By fixing the position of the seal ring at the head of the bolt and fitting it, the lubricant can be held in the screw, and a longer maintenance-free operation can be achieved.

以下、本発明を図面に示す実施形態に基づいて説明する。
図1は、本発明の実施形態に係るボールねじの潤滑シール装置を示す。
本実施形態に係るボールねじの潤滑シール装置4は、ボールねじナット2の両端面2c、2cに装着して、ボールねじナット2内に挿通するねじ軸1との間に多数のボール3を介して相対的な螺旋運動させる装置の、ねじ軸1のねじ溝部および外形部の潤滑に用いるものである。
Hereinafter, the present invention will be described based on embodiments shown in the drawings.
FIG. 1 shows a lubricating seal device for a ball screw according to an embodiment of the present invention.
The ball screw lubrication seal device 4 according to the present embodiment is attached to both end faces 2c, 2c of the ball screw nut 2 and a large number of balls 3 are interposed between the screw shaft 1 inserted into the ball screw nut 2. And a device for making a relative spiral movement of the screw shaft 1 is used for lubricating the groove portion and the outer shape portion.

図1ないし図3に示すように、本実施形態に係るボールねじの潤滑シール装置4は、ねじ軸1と、両端部2c、2cにねじ穴2a、2bを設け、ねじ軸1の外周に螺合されるボールねじナット2と、外径41dがボールねじナット2にほぼ見合う大きさで断面形状が略コ状の環状外枠体41と、外径42dが環状外枠体41の内径41cに嵌まり合う大きさで、環状外枠体41と逆方向へコ状に形成してなる環状内枠体42と、環状外枠体41と環状内枠体42との間に配置し、外径43fが環状内枠体42の内径42cに挿入され、内径43eをねじ軸1の軸直角断面形状に見合う形状に形成したシールリング43と、ボルト5とで構成される。このシールリング43は、本出願人が先に提案した特許文献4,5に示すように、樹脂繊維とゴム弾性体とを三次元融合させた繊維体で、内部に潤滑油を含浸させてある。   As shown in FIGS. 1 to 3, the ball screw lubrication seal device 4 according to this embodiment is provided with a screw shaft 1 and screw holes 2a and 2b at both ends 2c and 2c. The ball screw nut 2 to be joined, the outer diameter 41d is a size substantially matching the ball screw nut 2, the cross-sectional shape is substantially U-shaped, and the outer diameter 42d is the inner diameter 41c of the annular outer frame body 41. An annular inner frame body 42 formed in a U-shape in the opposite direction to the annular outer frame body 41 with a fitting size, and disposed between the annular outer frame body 41 and the annular inner frame body 42 and having an outer diameter 43 f is inserted into the inner diameter 42 c of the annular inner frame body 42, and the seal ring 43 and the bolt 5 are formed by forming the inner diameter 43 e into a shape corresponding to the cross-sectional shape perpendicular to the axis of the screw shaft 1. As shown in Patent Documents 4 and 5 previously proposed by the present applicant, the seal ring 43 is a fiber body in which resin fibers and a rubber elastic body are three-dimensionally fused, and is internally impregnated with lubricating oil. .

本実施形態に係るボールねじの潤滑シール装置4は、ボールねじナット2の両端面2c、2cにボルト5によって取り付けられる。そのために、環状外枠体41と環状内枠体42およびシールリング43には、図2および図4に示すように夫々を貫通する2つの小穴41a、41b、42a、42b、43a、43bが形成してある。そして、その位相は、図2に示すように、一方の穴位置を僅かに(図ではα=10°)ずらしてある。さらに、図3に示すように、ボールねじナット2の両端面2c、2cにも同様の位相位置にねじ穴2a、2bが形成してある。また、環状内枠体42およびシールリング43における小穴42a、42b、43a、43bは、ボルト5の頭部5aの直径より僅かに大きく形成してある。一方、環状外枠体41の小穴41a、41bは、ボルト5のねじ部5bの直径より僅かに大きい大きさに形成してある。   The ball screw lubrication seal device 4 according to the present embodiment is attached to both end faces 2 c and 2 c of the ball screw nut 2 by bolts 5. For this purpose, two small holes 41a, 41b, 42a, 42b, 43a, 43b are formed in the annular outer frame body 41, the annular inner frame body 42, and the seal ring 43, as shown in FIGS. It is. Then, as shown in FIG. 2, the phase is slightly shifted from one hole position (α = 10 ° in the figure). Further, as shown in FIG. 3, screw holes 2 a and 2 b are formed at the same phase position on both end faces 2 c and 2 c of the ball screw nut 2. The small holes 42a, 42b, 43a, 43b in the annular inner frame 42 and the seal ring 43 are formed slightly larger than the diameter of the head 5a of the bolt 5. On the other hand, the small holes 41 a and 41 b of the annular outer frame body 41 are formed to have a size slightly larger than the diameter of the screw portion 5 b of the bolt 5.

次に、本実施形態に係る潤滑シール装置4の組み付けについて説明する。
組み付けに際しては、先ず図4に示すような順に組み合わせるが、シールリング43の外形部は互いの小穴位置を合致させた上で環状内枠体42の内径へ接着固定する。そして、図5に示す形に組み付けて置き、図6に明示するように、ボールねじナット2のねじ穴2a、2bの位置へ環状外枠体41の小穴41a、41bの位置を合わせて、環状内枠体42の外側の小穴42a、42bからボルト5を挿入し、スパナ(図示せず)により螺合装着する。このように取り付けることにより、図1、図2に示すように潤滑シール装置4がボールねじナット2の両端面2c、2cに一体固定される。このときボールねじナット2の両端面2c、2cには段差2dが形成してあり、図3に示すように、環状外枠体41の内径41cが嵌り合う。
Next, assembly of the lubricating seal device 4 according to this embodiment will be described.
When assembling, first, they are combined in the order as shown in FIG. 4, and the outer portion of the seal ring 43 is bonded and fixed to the inner diameter of the annular inner frame body 42 after matching the positions of the small holes. As shown in FIG. 6, the small holes 41a and 41b of the annular outer frame body 41 are aligned with the positions of the screw holes 2a and 2b of the ball screw nut 2, as shown in FIG. Bolts 5 are inserted from the small holes 42a and 42b on the outer side of the inner frame body 42, and are screwed and attached by a spanner (not shown). By attaching in this way, the lubricating seal device 4 is integrally fixed to both end faces 2c, 2c of the ball screw nut 2 as shown in FIGS. At this time, a step 2d is formed on both end faces 2c, 2c of the ball screw nut 2, and an inner diameter 41c of the annular outer frame body 41 is fitted as shown in FIG.

図4において、シールリング43には、さらに小穴43c、43dが2個形成されている。小穴43c、43dは、シールリング43を複数枚重ねて装着する場合に、夫々ねじ軸1のリードに合わせて取り付けるためにずらした位置でボルト5を挿通するための穴である。
図3において、環状外枠体41と環状内枠体42およびシールリング43を組み付け状態で、環状内枠体42の内径42cにシールリング43との間に空間があり、ここへ潤滑油、例えばグリースを封入させることで、シールリング43に含浸させた潤滑油とともにねじ軸1側に作用するので、長期間の給油を不要にし、メンテナンスフリーが達成できる。
In FIG. 4, the seal ring 43 further has two small holes 43c and 43d. The small holes 43c and 43d are holes through which the bolts 5 are inserted at positions shifted so as to be fitted to the leads of the screw shaft 1 when a plurality of seal rings 43 are mounted in a stacked manner.
In FIG. 3, with the annular outer frame body 41, the annular inner frame body 42 and the seal ring 43 assembled, there is a space between the inner diameter 42c of the annular inner frame body 42 and the seal ring 43. By enclosing the grease, it acts on the screw shaft 1 side together with the lubricating oil impregnated in the seal ring 43, so long-term oil supply is unnecessary and maintenance-free can be achieved.

前述したように、ボールねじナット2の両端面2c、2cに潤滑シール装置4を取り付けるボルト5の小穴41a、41b、42a、42b、43a、43b、ねじ穴2a、2bの位置を僅かにずらして形成してある。例えば、180°という対称位置に形成してあると、組立時にシールリング43の内径43eとねじ軸1との設定位置が変化してしまう虞があるため、そのような誤組立を防止することができる。   As described above, the positions of the small holes 41a, 41b, 42a, 42b, 43a, 43b and the screw holes 2a, 2b of the bolt 5 for attaching the lubricating seal device 4 to the both end faces 2c, 2c of the ball screw nut 2 are slightly shifted. It is formed. For example, if it is formed at a symmetrical position of 180 °, the set position of the inner diameter 43e of the seal ring 43 and the screw shaft 1 may be changed during assembly, so that such erroneous assembly can be prevented. it can.

図3に明示したように、シールリング43は小穴43a、43bと環状内枠体42の小穴42a、42bとの位置を合致させた上で外形部43fを環状内枠体42の内径42cに接着固定する。ボルト5の頭部5aの一部がシールリング43の小穴43a、43bに嵌まっているので、ボルト5を挿入することで位置合わせができ、ボールねじナット2に対するシールリング43の位置を所定位置に保持することができ、その状態で接着作業が容易に実施でき、シール性を安定保持できるとともに、封入したグリースの流出も防止できる。   As clearly shown in FIG. 3, the seal ring 43 adheres the positions of the small holes 43 a and 43 b to the small holes 42 a and 42 b of the annular inner frame body 42 and adheres the outer portion 43 f to the inner diameter 42 c of the annular inner frame body 42. Fix it. Since a part of the head 5a of the bolt 5 is fitted in the small holes 43a and 43b of the seal ring 43, alignment can be performed by inserting the bolt 5, and the position of the seal ring 43 with respect to the ball screw nut 2 is set to a predetermined position. In this state, the bonding operation can be easily performed, the sealing performance can be stably maintained, and the sealed grease can be prevented from flowing out.

本実施形態において、環状外枠体41と環状内枠体42とは、図示したように組み立てた後、両者を接着固定しても良い。このような潤滑シール装置4をユニットとして用意しておくことで、メンテナンスの容易化も可能である。
なお、上記実施形態においては、ボールねじナット2の両端面2c、2cに段差2dを形成して、環状外枠体41の半径方向に固定しているが、段差2dが無くても装着固定は可能である。
In the present embodiment, the annular outer frame body 41 and the annular inner frame body 42 may be bonded and fixed after being assembled as illustrated. By preparing such a lubricating seal device 4 as a unit, maintenance can be facilitated.
In the above embodiment, the step 2d is formed on both end faces 2c, 2c of the ball screw nut 2 and fixed in the radial direction of the annular outer frame 41. Is possible.

本発明の一実施形態に係るボールねじの潤滑シール装置の部分断面図である。It is a fragmentary sectional view of the lubrication seal device of the ball screw concerning one embodiment of the present invention. 図1のA―A断面図である。It is AA sectional drawing of FIG. 図1のB矢視部拡大断面図である。FIG. 2 is an enlarged cross-sectional view taken along arrow B in FIG. 1. 図1の環状外枠体41、シールリング43および環状内枠体42の分解斜視図である。FIG. 2 is an exploded perspective view of an annular outer frame body 41, a seal ring 43, and an annular inner frame body 42 of FIG. 図1の環状外枠体41、シールリング43および環状内枠体42の組立斜視図である。FIG. 2 is an assembled perspective view of the annular outer frame body 41, the seal ring 43, and the annular inner frame body 42 of FIG. 本発明の一実施形態に係るボールねじの潤滑シール装置の取り付け状態を示す分解斜視図である。It is a disassembled perspective view which shows the attachment state of the lubricous seal apparatus of the ball screw which concerns on one Embodiment of this invention.

符号の説明Explanation of symbols

1 ねじ軸
2 ボールねじナット
2a、2b ねじ穴
2c ボールねじナット2の端面
3 ボール
4 潤滑シール装置
41 環状外枠体
41a、41b、42a、42b、43a、43b 小穴
42 環状内枠体
43 シールリング
5 ボルト
DESCRIPTION OF SYMBOLS 1 Screw shaft 2 Ball screw nut 2a, 2b Screw hole 2c End surface 3 of ball screw nut 2 Ball 4 Lubrication seal device 41 Annular outer frame 41a, 41b, 42a, 42b, 43a, 43b Small hole 42 Annular inner frame 43 Seal ring 5 volts

Claims (3)

ねじ軸と、
両端部に複数のねじ穴を設け、前記ねじ軸の外周に螺合されるボールねじナットと、
周縁部に貫通する複数の小穴を設け、前記ボールねじナットの両端面にそれぞれ当接する環状外枠体と、
周縁部に貫通する複数の小穴を設け、前記環状外枠体内に嵌まり合う環状内枠体と、
周縁部に貫通する複数の小穴を設け、潤滑剤を含浸保持し、内径を前記ねじ軸の軸直角断面形状に見合う形状として前記環状内枠体内に内装保持されるシールリングと、
前記シールリングを内装保持した前記環状内枠体を嵌め込んで前記ボールねじナットの両端面にそれぞれ当接する前記環状外枠体を、前記環状内枠体、前記シールリングおよび前記環状外枠体の各周縁部に設けた複数の小穴を介して前記ボールねじナットの両端面のねじ穴に螺着することによって固定するボルトと
を備え
前記環状外枠体、前記環状内枠体および前記シールリングに設けた複数の小穴は、それぞれ直径方向に対向して設けられるとともに、それぞれの前記小穴の一方の穴位置の位相をずらすことによって、前記ボールねじナットの端面の非対称位置に形成され、
前記環状内枠体および前記シールリングの複数の小穴は、前記ボルトの頭が挿通できる大きさに設定され、
前記シールリングは、前記ボルトの頭部により位置決めされている
ことを特徴とするボールねじの潤滑シール装置。
A screw shaft;
A ball screw nut provided with a plurality of screw holes at both ends and screwed onto the outer periphery of the screw shaft;
A plurality of small holes penetrating the peripheral edge, and annular outer frame bodies that respectively contact the both end faces of the ball screw nut;
A plurality of small holes penetrating the periphery, and an annular inner frame that fits within the annular outer frame;
A seal ring provided with a plurality of small holes penetrating the peripheral edge, impregnated and held with a lubricant, and internally held in the annular inner frame as a shape corresponding to the cross-sectional shape perpendicular to the axis of the screw shaft;
The annular outer frame body fitted into the annular inner frame body holding the seal ring therein and abutting against both end faces of the ball screw nut is connected to the annular inner frame body, the seal ring and the annular outer frame body. A bolt that is fixed by being screwed into the screw holes on both end faces of the ball screw nut through a plurality of small holes provided in each peripheral portion ,
A plurality of small holes provided in the annular outer frame body, the annular inner frame body and the seal ring are provided to face each other in the diameter direction, and by shifting the phase of one hole position of each of the small holes, Formed at the asymmetrical position of the end face of the ball screw nut,
The plurality of small holes of the annular inner frame and the seal ring are set to a size that allows the head of the bolt to be inserted,
A ball screw lubricated seal device , wherein the seal ring is positioned by a head of the bolt .
前記シールリングは、複数枚重ねて積層される際に、それぞれ前記ねじ軸のリードに合わせて穴位置をずらした位置で前記ボルトを挿通することができるように、それぞれ直径方向に対向して対を為す複数の小穴を有し、各対を為す小穴の一方の穴位置の位相をずらすことによって、前記ボールねじナットの端面の非対称位置に形成されている
ことを特徴とする請求項1に記載のボールねじの潤滑シール装置。
When the plurality of the seal rings are stacked one on top of the other, the bolts can be inserted at positions where the hole positions are shifted in accordance with the leads of the screw shafts. has a plurality of small holes which form a, by shifting the phase of one of the hole position of the small hole each pair, according to claim 1, characterized in that it is formed asymmetrically position of the end face of the ball screw nut Ball screw lubrication seal device.
前記ボールねじナットの両端面側の前記円板状のシールリングと前記ボールねじナットの両端面との間には、潤滑油を封入する空間が形成されている
ことを特徴とする請求項1または請求項2に記載のボールねじの潤滑シール装置。
The space for enclosing lubricating oil is formed between the disc-shaped seal ring on both end surfaces of the ball screw nut and both end surfaces of the ball screw nut. The lubricating seal device for a ball screw according to claim 2.
JP2006200241A 2006-07-24 2006-07-24 Ball screw lubrication seal device Active JP4732263B2 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002364726A (en) * 2001-04-05 2002-12-18 Thk Co Ltd Seal for ball screw, and ball screw using the seal for ball screw
JP2004205016A (en) * 2002-12-26 2004-07-22 Nsk Ltd Linear motion device
JP2006118602A (en) * 2004-10-21 2006-05-11 Kuroda Precision Ind Ltd Ball screw lubrication seal device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002364726A (en) * 2001-04-05 2002-12-18 Thk Co Ltd Seal for ball screw, and ball screw using the seal for ball screw
JP2004205016A (en) * 2002-12-26 2004-07-22 Nsk Ltd Linear motion device
JP2006118602A (en) * 2004-10-21 2006-05-11 Kuroda Precision Ind Ltd Ball screw lubrication seal device

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