JPS6248406A - Tail stock - Google Patents

Tail stock

Info

Publication number
JPS6248406A
JPS6248406A JP18582185A JP18582185A JPS6248406A JP S6248406 A JPS6248406 A JP S6248406A JP 18582185 A JP18582185 A JP 18582185A JP 18582185 A JP18582185 A JP 18582185A JP S6248406 A JPS6248406 A JP S6248406A
Authority
JP
Japan
Prior art keywords
shaft
piston body
tailstock
tailstock spindle
static pressure
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
Application number
JP18582185A
Other languages
Japanese (ja)
Inventor
Isamu Kawashima
勇 川島
Norio Sakakibara
榊原 則夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyoda Koki KK
Original Assignee
Toyoda Koki KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyoda Koki KK filed Critical Toyoda Koki KK
Priority to JP18582185A priority Critical patent/JPS6248406A/en
Publication of JPS6248406A publication Critical patent/JPS6248406A/en
Pending legal-status Critical Current

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  • Turning (AREA)

Abstract

PURPOSE:To remove the cause of seizures keeping the accuracy of the rotation of a tailstock spindle high by making a reciprocating shaft perform point contact to a piston body and supporting the piston body by a static pressure radial bearing in a radial direction in the tail stock of lathes, grinding machines, and so on. CONSTITUTION:The working force acted on a reciprocating shaft 6 in a forward direction by a cylinder device is transfered to a piston body 13 through the point contact caused by a plunge face 17 and to a tailstock spindle 3, in addition, through a flange 14 by a statioc pressure thrust bearing 15 forwarding the tailstock spindle 3. Even if the axes of the tailstock spindle 3 and reciprocating shaft 6 are inclined at this time, the inclination of the center axis of the internal periphery of a casing 12 and the axis of the tailstock spindle 3 is adsorbed by a static pressure radial bearing 18 supporting the piston body 13 in a radial direction in stabilized condition. Therefore, the non-contact state of the static pressure thrust bearing 15 removed the cause of seizures resulting in keeping the accuracy of the rotation of the tailstock spindle 3 high.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、旋盤、研削盤等の心押台lこ関するものであ
る。
DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a tailstock of a lathe, a grinder, etc.

〈従来の技術〉 旋盤、研削盤等の中には極めてきびしい加工精度を要求
されるものがあり、心押台の心押し軸の回転精度を高め
るために心押し軸を心押台本体に静圧ラジアル軸受で軸
承している。またワーク着脱のために心押し軸を進退移
動させる必要があり、そのためにシリンダ装置等により
進退作動される進退軸で行っている。この進退軸と心押
し軸との連結は、進退軸の前端に一体に設けられたピス
トン体に設けられている静圧スラスト軸受により心押し
軸の後端を回転を許容し、軸方向は進退軸と一体移動す
るよう結合した構造である。
<Conventional technology> Some lathes, grinders, etc. require extremely strict machining accuracy, and in order to improve the rotation accuracy of the tailstock shaft of the tailstock, it is necessary to mount the tailstock shaft statically on the tailstock body. It is supported by pressure radial bearings. In addition, it is necessary to move the tailstock shaft forward and backward in order to attach and detach the workpiece, and for this purpose, a forward and backward shaft that is moved forward and backward by a cylinder device or the like is used. The connection between the forward and backward shaft and the tailstock shaft is such that the rear end of the tailstock shaft is allowed to rotate by a hydrostatic thrust bearing provided in a piston body that is integrally provided at the front end of the forward and backward shaft, and the axial direction is It has a structure that is connected to the shaft so that it moves together with the shaft.

〈発明が解決しようとする問題点〉 上記従来構造による心押し軸と進退軸の結合では、心押
し軸と進退軸の軸線が互いに傾いていると、スラスト軸
受が接触し、焼けが発生する問題がある。
<Problems to be Solved by the Invention> In the above-mentioned conventional structure for coupling the tailstock shaft and the forward/backward shaft, if the axes of the tailstock shaft and the forward/backward shaft are inclined to each other, the thrust bearings may come into contact with each other, causing burnout. There is.

〈問題点を解決するための手段〉 本発明は、上記従来の問題点を解決するためlこ、心押
台本体に静圧ラジアル軸受により回転並びに軸方向に移
動可能に軸承した心神軸と、この心押し軸の後方に心押
し軸と同心線上で作動装置lこより進退移動可能に設け
られた進退軸と、この進退軸と前記心押し軸とをピスト
ン体に設けられた静圧スラスト軸受によって連結した心
神台において、前記進退軸をピストン体に軸方向を係合
して点接触し、前記ピスト、ン体を半径方向に支持する
静圧ラジアル軸受を設け、進退軸に対しピストン体をフ
ローチング可能としたものである。
<Means for Solving the Problems> In order to solve the above-mentioned conventional problems, the present invention provides a tailstock main shaft rotatably and axially movably supported by a hydrostatic radial bearing; A forward/backward shaft is provided at the rear of the tailstock shaft so as to be movable forward and backward by an actuating device on a line concentric with the tailstock shaft, and this forward/backward shaft and the tailstock shaft are connected by a hydrostatic thrust bearing provided in the piston body. In the connected Shinjindai, a static pressure radial bearing is provided which engages the forward and backward shaft in the axial direction with the piston body and makes point contact, and supports the piston body in the radial direction, so that the piston body flows relative to the forward and backward shaft. This makes it possible to perform

〈作 用〉 本発明は、進退軸に作用されるスライド力をピストン本
体に点当りを介して伝え、このピストン体に加えられた
力を静圧スラスト軸受を介して心押し軸に伝えるもので
ある。
<Operation> The present invention transmits the sliding force applied to the advance/retreat shaft to the piston body through a point contact, and transmits the force applied to the piston body to the tailstock shaft through a hydrostatic thrust bearing. be.

〈実施例〉 以下本発明の実施例を図面に基づいて説明する。第1図
において、lはテーブル、2はテーブル1上に設置され
た心神台本体である。この心神台本体2には心押し軸3
が静圧ラジアル軸受5により回転並びに軸方向に移動可
能lこ軸承されている。4は心押し軸3の先端Ic嵌着
されたセンタである。、6は前記心押し軸3の後方に心
押し軸3と同心線上で進退移動可能lこ設けられた進退
軸である。この進退軸6は、第2図で示すように、心神
台本体2に進退軸6と平行な軸線方向に設けられたシリ
ンダ装置7のピストンロッドにと連結部材8を介して結
合されている。9はスプリング、10は前記スプリング
9の調整つまみである。11は連結部材8と進退軸6と
を係合する回り止めピンである。
<Example> Hereinafter, an example of the present invention will be described based on the drawings. In FIG. 1, l is a table, and 2 is the main body of the Shinshindai installed on the table 1. This Shinshindai main body 2 has a tailstock shaft 3.
is rotatably and axially movably supported by a hydrostatic radial bearing 5. 4 is a center into which the tip Ic of the tailstock shaft 3 is fitted. , 6 is a forward and backward shaft provided behind the tailstock shaft 3 so as to be movable forward and backward on a concentric line with the tailstock shaft 3. As shown in FIG. 2, this advance/retreat shaft 6 is coupled via a connecting member 8 to a piston rod of a cylinder device 7 provided in the Shinshindai main body 2 in an axial direction parallel to the advance/retreat shaft 6. 9 is a spring, and 10 is an adjustment knob for the spring 9. Reference numeral 11 denotes a rotation stopper pin that engages the connecting member 8 and the reciprocating shaft 6.

12は心神台本体2に固設された筒状のケーシングであ
り、このケーシング12に前記進退軸6が摺動自在に保
持され、またケーシング12にはピストン体13が内設
されている。このピストン体13には静圧スラスト軸受
15が設けられ、前記心押し軸3の後端に形成された7
ランジ14がスラスト軸承されている。
Reference numeral 12 denotes a cylindrical casing fixed to the Shinshindai main body 2. The reciprocating shaft 6 is slidably held in the casing 12, and a piston body 13 is installed inside the casing 12. This piston body 13 is provided with a static pressure thrust bearing 15, and a 7
The flange 14 is thrust-supported.

本発明は、前記ピストン体13と進退軸6とを分離し、
ピストン体13に設けた保合部16により進退軸6と軸
方向の保合を可能とし、また第3図でも示すように球面
の押付面17によりピストン体13に点接触させる。さ
らに、ピストン体13の外周面に静圧ラジアル軸受18
を設け、ケーシング12に対しピストン体13を半径方
向に支持したものである。尚、図示省略しであるが、ピ
ストン体13を半径方向に支持する静圧ラジアル軸受を
、7ランジ14の外周面が対面するピストン体13内周
に設けても同じ機能が得られる。この場合、ピストン体
13は心押し軸3に支持され、ケーシング12の内周に
は案内支持されない。
The present invention separates the piston body 13 and the forward/backward shaft 6,
A retaining portion 16 provided on the piston body 13 enables the piston body 13 to be secured in the axial direction with the advance/retreat shaft 6, and as shown in FIG. 3, a spherical pressing surface 17 makes point contact with the piston body 13. Furthermore, a static pressure radial bearing 18 is provided on the outer peripheral surface of the piston body 13.
The piston body 13 is supported in the radial direction with respect to the casing 12. Although not shown, the same function can be obtained by providing a static pressure radial bearing that supports the piston body 13 in the radial direction on the inner periphery of the piston body 13 facing the outer peripheral surface of the seven flange 14. In this case, the piston body 13 is supported by the tailstock shaft 3 and is not guided and supported by the inner circumference of the casing 12.

本発明は上記の通りの構成であるから、シリンダ装置7
によって進退軸6に前進方向に加えられる作動力は、進
退軸6の先端の押付面17による点当接によりピストン
体13に伝えられ、さらに、静圧スラスト軸承工5によ
り7ランジ14を介して心押し軸3に伝達し、心押し軸
3を前進移動させる。このとき、心押し軸3と進退軸6
の軸線が傾いていても、ピストン体13を半径方向に支
持する静圧ラジアル軸受18により、さらに第3図で示
すように隙間Cにより進退軸6に対しピストン体13を
フローチングさせるので、ケーシング12の内周の中心
線と心押し軸3の軸線との傾きは隙間α、bで吸収し、
ピストン体13を安定した状態で保持され、静圧スラス
ト軸受15は7ランジエ4には接触しない。進退軸6の
前進後退時にピストン体13にモーメントが生じる力が
加わっても、ピストン体13を半径方向lこ支持する静
圧ラジアル軸受18により反モーメントが発生し、ピス
トン体13を安定した状態に保持することができる。
Since the present invention is configured as described above, the cylinder device 7
The operating force applied in the forward direction to the forward/backward shaft 6 is transmitted to the piston body 13 through point contact by the pressing surface 17 at the tip of the forward/backward shaft 6, and is further transmitted to the piston body 13 by the hydrostatic thrust bearing 5 via the 7 langes 14. The signal is transmitted to the tailstock shaft 3, and the tailstock shaft 3 is moved forward. At this time, the tailstock shaft 3 and the forward/backward shaft 6
Even if the axis of the casing is tilted, the static pressure radial bearing 18 that supports the piston body 13 in the radial direction allows the piston body 13 to float with respect to the advance/retreat shaft 6 due to the gap C as shown in FIG. The inclination between the center line of the inner circumference of 12 and the axis of the tailstock shaft 3 is absorbed by the gaps α and b,
The piston body 13 is held in a stable state, and the hydrostatic thrust bearing 15 does not come into contact with the 7-lunger 4. Even if a force that generates a moment is applied to the piston body 13 when the forward/backward shaft 6 advances or retreats, a counter moment is generated by the static pressure radial bearing 18 that supports the piston body 13 in the radial direction, and the piston body 13 is kept in a stable state. can be retained.

心押し軸3の後退移動は、進退軸6の後退軸動によりピ
ストン体13に設けられている保合部工6が進退軸6に
係合してピストン体13を介して行われる。
The backward movement of the tailstock shaft 3 is performed via the piston body 13 as the retaining part 6 provided on the piston body 13 engages with the forward/backward shaft 6 due to the backward movement of the forward/backward shaft 6 .

〈発明の効果〉 以上のように本発明によると、心押し軸を静圧スラスト
軸受で連結しているピストン体と進退軸とを分離し、ピ
ストン体に対し進退軸を点接触させ、ピストン体を静圧
ラジアル軸受によつて半径方向に支持した構成であるか
ら、心押し軸と進退軸の軸線が互い(こ煩いでも、ピス
トン体がこれを吸収するため、スラスト軸受が接触せず
、焼けの発生を防止し、心押し軸の回転精度を極めて高
く保持する利点がある。
<Effects of the Invention> As described above, according to the present invention, the piston body, which connects the tailstock shaft with a hydrostatic thrust bearing, and the advance/retreat shaft are separated, the advance/retreat shaft is brought into point contact with the piston body, and the piston body is supported in the radial direction by hydrostatic radial bearings, so the axes of the tailstock shaft and forward/backward shaft are aligned with each other. This has the advantage of preventing the occurrence of problems and maintaining extremely high rotation accuracy of the tailstock shaft.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の断面図、第2図はtg1図■矢視図、
第3図は第1図における本発明の要部拡大図である。 2・−中心押台本体、3・・・心押し軸、5・・・静圧
ラジアル軸受、6・・・進退軸、13・−〇ピストン体
、14・−−7ランジ、15−・・静圧スラスト軸受、
16・・・係合部、17・・・押付面、18・・・静圧
ラジアル軸受。
Fig. 1 is a sectional view of the present invention, Fig. 2 is a tg1 view,
FIG. 3 is an enlarged view of the main part of the present invention in FIG. 1. 2.-Center stock body, 3..Tailstock shaft, 5..Static pressure radial bearing, 6..Advancing/retracting shaft, 13.--Piston body, 14.--7 lange, 15-. hydrostatic thrust bearing,
16... Engaging portion, 17... Pressing surface, 18... Static pressure radial bearing.

Claims (1)

【特許請求の範囲】[Claims] 心押台本体に静圧ラジアル軸受により回転並びに軸方向
に移動可能に軸承した心押軸と、この心押し軸の後方に
心押し軸と同心線上で作動装置により進退移動可能に設
けられた進退軸と、この進退軸と前記心押し軸とをピス
トン体に設けられた静圧スラスト軸受によつて連結した
心押台において、前記進退軸をピストン体に軸方向を係
合して点接触し、前記ピストン体を半径方向に支持する
静圧ラジアル軸受を設け、進退軸に対しピストン体をフ
ローチング可能としたことを特徴とする心押台。
A tailstock shaft is rotatably and axially movably supported on the tailstock body by a hydrostatic radial bearing, and a retractor is provided at the rear of the tailstock shaft on a concentric line with the tailstock shaft so that it can be moved forward and backward by an actuator. A shaft, and a tailstock in which the advance/retreat shaft and the tailstock shaft are connected by a hydrostatic thrust bearing provided in the piston body, the advance/retreat shaft is engaged with the piston body in the axial direction to make point contact. A tailstock characterized in that a static pressure radial bearing is provided to support the piston body in the radial direction, and the piston body can float with respect to an advance/retreat axis.
JP18582185A 1985-08-26 1985-08-26 Tail stock Pending JPS6248406A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18582185A JPS6248406A (en) 1985-08-26 1985-08-26 Tail stock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18582185A JPS6248406A (en) 1985-08-26 1985-08-26 Tail stock

Publications (1)

Publication Number Publication Date
JPS6248406A true JPS6248406A (en) 1987-03-03

Family

ID=16177467

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18582185A Pending JPS6248406A (en) 1985-08-26 1985-08-26 Tail stock

Country Status (1)

Country Link
JP (1) JPS6248406A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103317156A (en) * 2013-06-28 2013-09-25 侯马市东鑫机械铸造有限公司 Pneumatic tailstock of machine tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103317156A (en) * 2013-06-28 2013-09-25 侯马市东鑫机械铸造有限公司 Pneumatic tailstock of machine tool

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