JP2012200825A - Machine tool - Google Patents

Machine tool Download PDF

Info

Publication number
JP2012200825A
JP2012200825A JP2011068434A JP2011068434A JP2012200825A JP 2012200825 A JP2012200825 A JP 2012200825A JP 2011068434 A JP2011068434 A JP 2011068434A JP 2011068434 A JP2011068434 A JP 2011068434A JP 2012200825 A JP2012200825 A JP 2012200825A
Authority
JP
Japan
Prior art keywords
holding shaft
tool holding
air
shaft
machine tool
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
Application number
JP2011068434A
Other languages
Japanese (ja)
Other versions
JP5782773B2 (en
Inventor
Naoto Terasaka
直人 寺阪
Keishi Ito
恵史 伊藤
Akira Honda
亮 本田
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.)
Brother Industries Ltd
Original Assignee
Brother Industries Ltd
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 Brother Industries Ltd filed Critical Brother Industries Ltd
Priority to JP2011068434A priority Critical patent/JP5782773B2/en
Priority to KR1020120026458A priority patent/KR101387824B1/en
Priority to CN2012201153104U priority patent/CN202528008U/en
Publication of JP2012200825A publication Critical patent/JP2012200825A/en
Application granted granted Critical
Publication of JP5782773B2 publication Critical patent/JP5782773B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/12—Arrangements for cooling or lubricating parts of the machine
    • B23Q11/121—Arrangements for cooling or lubricating parts of the machine with lubricating effect for reducing friction
    • B23Q11/123—Arrangements for cooling or lubricating parts of the machine with lubricating effect for reducing friction for lubricating spindle bearings
    • 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
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B23Q11/14—Methods or arrangements for maintaining a constant temperature in parts of machine tools
    • B23Q11/145—Methods or arrangements for maintaining a constant temperature in parts of machine tools using a jet of gas or cutting liquid
    • 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
    • B23Q5/02—Driving main working members
    • B23Q5/04—Driving main working members rotary shafts, e.g. working-spindles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Turning (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a machine tool capable of simply preventing a rise in temperature of a bearing portion for supporting a tool holding shaft even if the tool holding shaft is continuously turned at high speed.SOLUTION: A lower end of the tool holding shaft 3 having its upper end 3f disposed in a cavity 12 is fitted into and held by an angular ball bearing 2 of a head 1 having a bearing hole 13 for holding the angular ball bearing 2 and the cavity 12 where the bearing hole 13 is opened. A cylinder 7 opened in the cavity 12 for blowing the air out toward the upper end 3f is attached to the head 1. The tool holding shaft 3 is cooled by the air blown out from the cylinder 7, thereby preventing rise in the temperature of the tool holding shaft 3. In turn, rise in temperature of the angular ball bearing 2 portion is suppressed by the tool holding shaft 3.

Description

本発明はヘッド部に工具保持軸が回転自在に保持されている工作機械に関する。   The present invention relates to a machine tool in which a tool holding shaft is rotatably held by a head portion.

工作機械は、同心上の軸長方向へ離隔した２位置夫々に複数の軸受を保持してあり、他上下に貫通する軸受孔及び該軸受孔の上部が開放されている空洞を有する箱形状のヘッド部と、その上端部が前記空洞に配され、下端部が前記軸受の夫々に嵌入保持され、回転中心が上下となる工具保持軸と、前記ヘッド部の上部外側に装着される電動モータと、該電動モータの駆動軸及び前記工具保持軸の上端部を前記空洞内で連動連結する軸継手とを備え、電動モータの駆動により工具保持軸を比較的高速で連続回転させ、該工具保持軸の下端部に保持されているドリル等の回転加工用工具を回転させ、ワークに回転加工を施すように構成されている（例えば、特許文献１参照）。   The machine tool holds a plurality of bearings at two positions that are concentrically spaced apart in the axial length direction, and has a box-like shape having a bearing hole that penetrates vertically and a cavity in which the upper portion of the bearing hole is open. A head portion, a tool holding shaft whose upper end portion is arranged in the cavity, and whose lower end portion is fitted and held in each of the bearings, and whose rotation center is up and down, and an electric motor mounted on the upper outer side of the head portion; A shaft coupling that interlocks and connects the drive shaft of the electric motor and the upper end of the tool holding shaft within the cavity, and the tool holding shaft is continuously rotated at a relatively high speed by driving the electric motor. A rotating tool such as a drill held at the lower end of the workpiece is rotated to rotate the workpiece (for example, see Patent Document 1).

軸受孔に上下に離隔して配される軸受はアンギュラ玉軸受であり、内輪及び外輪間に潤滑油脂を塗布してアンギュラ玉軸受の耐久性を高めてあり、工具保持軸の上端部中間には上方のアンギュラ玉軸受の内輪端面に当接して工具保持軸にアキシャル方向の予圧を加える螺子環が螺着され、工具保持軸のアキシャル方向へのガタ付きを防ぐように構成されている。   Bearings that are spaced apart in the vertical direction in the bearing hole are angular ball bearings, and lubrication oil is applied between the inner and outer rings to increase the durability of the angular ball bearings. A screw ring that abuts the inner ring end surface of the upper angular ball bearing and applies axial preload to the tool holding shaft is screwed to prevent the tool holding shaft from rattling in the axial direction.

特開２００６−８２１７５号公報JP 2006-82175 A

ところで、工具保持軸を長時間に亘って高速で連続回転させつつ複数のワークに回転加工を施す場合、アンギュラ玉軸受部分の昇温が過大となり、アンギュラ玉軸受に塗布されている潤滑油脂が劣化するとともに工具保持軸がアキシャル方向へ熱膨張するとともに、アンギュラ玉軸受の内輪及び外輪の温度差が大きくなり、内輪のアキシャル方向への熱膨張量が外輪よりも多くなり、工具保持軸に加えられている予圧が低下することになる。潤滑油脂の劣化は、工具保持軸を高速で回転させることができなくなり、工具保持軸の交換が必要となる。また、予圧の低下は工具保持軸がアキシャル方向へガタ付き易くなり、工具保持軸の剛性が低下し、回転加工能力の低下を来すことになる。   By the way, when rotating a plurality of workpieces while continuously rotating the tool holding shaft at high speed for a long time, the temperature rise of the angular ball bearing part becomes excessive, and the lubricating oil applied to the angular ball bearing deteriorates. At the same time, the tool holding shaft thermally expands in the axial direction, the temperature difference between the inner and outer rings of the angular ball bearing increases, and the amount of thermal expansion of the inner ring in the axial direction is greater than that of the outer ring, which is applied to the tool holding shaft. The preload that will be reduced. Due to the deterioration of the lubricating oil, the tool holding shaft cannot be rotated at high speed, and the tool holding shaft needs to be replaced. In addition, the decrease in preload makes the tool holding shaft more likely to rattle in the axial direction, lowering the rigidity of the tool holding shaft and lowering the rotational machining capability.

本発明は斯かる事情に鑑みてなされたものであり、主たる目的はヘッド部の空洞に配されている工具保持軸の一端部の側へ空気を吹出す空気吹出手段を設けて、工具保持軸の一端部を冷却することにより、工具保持軸が高速で連続回転された場合でも工具保持軸の他端部を支持する軸受部分の昇温を簡易に抑制することができる工作機械を提供することにある。   The present invention has been made in view of such circumstances, and a main object of the present invention is to provide an air blowing means for blowing air toward one end of the tool holding shaft disposed in the cavity of the head portion. To provide a machine tool that can easily suppress the temperature rise of the bearing portion that supports the other end of the tool holding shaft even when the tool holding shaft is continuously rotated at a high speed by cooling one end of the tool It is in.

また、他の目的は、吹出手段を前記一端部よりも軸受孔側に配することにより、工具保持軸周りの他の部材に影響されることなく、工具保持軸の一端部を効率よく冷却することができる工作機械を提供することにある。   Another object of the present invention is to efficiently cool one end of the tool holding shaft without being affected by other members around the tool holding shaft by disposing the blowing means closer to the bearing hole than the one end. The object is to provide a machine tool capable of doing this.

また、他の目的は、吹出手段よりも工具保持軸の駆動源側に排気口を開設することにより、空洞内に配してある工具保持軸の一端部の冷却効果を高めることができる工作機械を提供することにある。   Another object of the present invention is to provide a machine tool capable of enhancing the cooling effect of one end of the tool holding shaft arranged in the cavity by opening an exhaust port on the drive source side of the tool holding shaft with respect to the blowing means. Is to provide.

また、他の目的は、吹出口を有する筒体をヘッド部に挿嵌することにより、空気の吹出方向を容易に設定することが可能となる工作機械を提供することにある。   Another object of the present invention is to provide a machine tool in which the air blowing direction can be easily set by inserting a cylindrical body having an air outlet into the head portion.

また、他の目的は、工具保持軸の周面から離隔し、工具保持軸の軸心と交差する位置に筒体を配し、該筒体の周面に吹出口を開設することにより、加圧空気源の空気圧が比較的高い場合においても比較的低圧の空気を吹出すことができ、工具保持軸を除々に冷却することができる工作機械を提供することにある。   Another object is to place a cylinder at a position that is separated from the peripheral surface of the tool holding shaft, intersects with the axis of the tool holding shaft, and opens an outlet on the peripheral surface of the cylindrical body. An object of the present invention is to provide a machine tool capable of blowing out a relatively low-pressure air even when the air pressure of a pressurized air source is relatively high and gradually cooling a tool holding shaft.

また、他の目的は、筒体の長手方向へ離隔した複数の位置に吹出口を設けることにより、吹出空気を集中させることなく工具保持軸に向けて広範囲に吹出すことができ、工具保持軸を除々に冷却することができる工作機械を提供することにある。   Another object is to provide a wide range of air outlets at a plurality of positions spaced apart in the longitudinal direction of the cylinder so that the air can be blown out widely toward the tool holding shaft without concentrating the blown air. The object is to provide a machine tool capable of gradually cooling.

また、他の目的は、工具保持軸の一端部を電動モータの駆動軸に連結する軸継手と対向する位置又は該軸継手よりも電動モータ側に吹出口を配することにより、軸継手に一端部が連結されている工具保持軸、及び工具保持軸が嵌入されている軸受の昇温を抑制することができる工作機械を提供することにある。   Another object is to place one end of the tool holding shaft at a position opposite to the shaft coupling connecting to the drive shaft of the electric motor or an outlet on the electric motor side of the shaft coupling. An object of the present invention is to provide a machine tool capable of suppressing the temperature rise of a tool holding shaft to which a portion is connected and a bearing in which the tool holding shaft is inserted.

本発明に係る工作機械は、空洞を有するヘッド部を内外に貫通する軸受孔に軸受を保持してあり、該軸受に工具保持軸を嵌入支持してあり、該工具保持軸の空洞側の一端部が駆動源に連動連結されている工作機械において、前記一端部の側へ空気を吹出す空気吹出手段を備えることを特徴とする。   In the machine tool according to the present invention, a bearing is held in a bearing hole that penetrates a head portion having a cavity inward and outward, and a tool holding shaft is fitted and supported in the bearing, and one end on the cavity side of the tool holding shaft. In a machine tool in which the part is interlocked with a drive source, the machine tool includes air blowing means for blowing air to the one end side.

本発明にあっては、ヘッド部の空洞に配される工具保持軸の一端部の側へ空気吹出手段から空気が吹出され、吹出空気により前記一端部を冷却することができるため、工具保持軸が長時間に亘って高速で連続回転する際に、該工具保持軸の昇温を抑制でき、該工具保持軸の他端部が嵌入されている軸受の昇温を抑制することができる。よって、軸受に塗布されている潤滑油脂の劣化を抑制でき、軸受及び工具保持軸の寿命を長くすることができるとともに、回転加工能力の持続時間を長くすることができる。   In the present invention, since the air is blown from the air blowing means to the one end portion side of the tool holding shaft arranged in the cavity of the head portion, and the one end portion can be cooled by the blown air, the tool holding shaft When the tool is continuously rotated at a high speed for a long time, the temperature rise of the tool holding shaft can be suppressed, and the temperature rise of the bearing in which the other end of the tool holding shaft is fitted can be suppressed. Therefore, the deterioration of the lubricating oil applied to the bearing can be suppressed, the life of the bearing and the tool holding shaft can be extended, and the duration of the rotational machining capability can be increased.

また、本発明に係る工作機械は、空気吹出手段は、前記一端部よりも前記軸受孔側に配してあることを特徴とする。
本発明にあっては、ヘッド部の空洞内で、工具保持軸の一端部周りに配されるアンクランプ用のレバー、軸継手などに影響されることなく、工具保持軸の一端部を効率よく冷却、ひいては軸受を効率よく冷却することができる。 Further, the machine tool according to the present invention is characterized in that the air blowing means is arranged on the bearing hole side with respect to the one end portion.
In the present invention, the end portion of the tool holding shaft can be efficiently moved within the cavity of the head portion without being affected by an unclamping lever, a shaft coupling or the like disposed around the one end portion of the tool holding shaft. Cooling, and thus the bearing can be efficiently cooled.

また、本発明に係る工作機械は、前記ヘッド部は、前記空気吹出手段よりも前記駆動源側に排気口を開設してあることを特徴とする。
本発明にあっては、ヘッド部の空洞内に、吹出口から排気口に至る通気路ができ、工具保持軸の一端部を冷却した後の空気を駆動源側の排気口から速やかに外部へ排気することができるため、空洞内に配してある工具保持軸の一端部の冷却効果、ひいては軸受の冷却効果を高めることができる。 Further, the machine tool according to the present invention is characterized in that the head portion has an exhaust port on the drive source side with respect to the air blowing means.
In the present invention, an air passage extending from the blowout port to the exhaust port is formed in the cavity of the head unit, and the air after cooling one end of the tool holding shaft is quickly discharged from the exhaust port on the drive source side to the outside. Since it can exhaust, the cooling effect of the one end part of the tool holding shaft arranged in the cavity, and the cooling effect of the bearing can be enhanced.

また、本発明に係る工作機械は、前記空気吹出手段は、吹出口を有し、前記ヘッド部に嵌挿されている筒体であることを特徴とする。
本発明にあっては、既存のヘッド部に貫通孔を開設し、該貫通孔に筒体を嵌挿することにより、工具保持軸の一端部の側へ空気を吹出すことができるため、空気の吹出方向を容易に設定することでき、工具保持軸の一端部を効率的に冷却することができる。 Further, the machine tool according to the present invention is characterized in that the air blowing means is a cylindrical body having a blowout opening and fitted into the head portion.
In the present invention, air can be blown to one end of the tool holding shaft by opening a through hole in the existing head and inserting a cylinder into the through hole. Can be easily set, and one end of the tool holding shaft can be efficiently cooled.

また、本発明に係る工作機械は、前記筒体は、前記工具保持軸の周面から離隔した位置で、且つ該工具保持軸の軸心と交差する位置に配され、該筒体の周面に前記吹出口が開設されていることを特徴とする。
本発明にあっては、筒体内に供給されて該筒体内を長手方向へ流れる空気の通気方向を、直交する方向に変えて吹出すことができ、通気方向が変わる際に減圧することができるため、加圧空気源の空気圧が比較的高い場合においても比較的低圧の空気を、空気量を減らすことなく吹出すことができ、工具保持軸を除々に冷却することができる。 Further, in the machine tool according to the present invention, the cylindrical body is disposed at a position separated from the peripheral surface of the tool holding shaft and at a position intersecting with the axis of the tool holding shaft, and the peripheral surface of the cylindrical body The air outlet is opened.
In the present invention, it is possible to change the ventilation direction of the air that is supplied into the cylinder and flows in the longitudinal direction in the cylinder, and to blow it out in an orthogonal direction, and to reduce the pressure when the ventilation direction changes. Therefore, even when the air pressure of the pressurized air source is relatively high, relatively low pressure air can be blown out without reducing the amount of air, and the tool holding shaft can be gradually cooled.

また、本発明に係る工作機械は、前記筒体の長手方向へ離隔した複数の位置に前記吹出口を配してあることを特徴とする。
本発明にあっては、筒体の長手方向へ離隔した複数の吹出口から比較的低圧の空気を、空気量を減らすことなく吹出すことができるため、吹出空気を集中させることなく工具保持軸に向けて広範囲に吹出すことができ、工具保持軸を除々に冷却することができる。 The machine tool according to the present invention is characterized in that the air outlets are arranged at a plurality of positions spaced apart in the longitudinal direction of the cylindrical body.
In the present invention, relatively low-pressure air can be blown out from a plurality of outlets separated in the longitudinal direction of the cylindrical body without reducing the amount of air, so that the tool holding shaft does not concentrate the blown-out air The tool holding shaft can be gradually cooled.

また、本発明に係る工作機械は、前記駆動源は、前記ヘッド部の外部に装着されている電動モータであり、該電動モータの駆動軸及び前記一端部を前記空洞内で連動連結してある軸継手を備え、該軸継手と対向する位置又は該軸継手よりも前記電動モータ側に前記空気吹出手段を配してあることを特徴とする。
本発明にあっては、工具保持軸及び電動モータから熱伝達される軸継手を、吹出手段から吹出す空気にて冷却することができ、軸継手の昇温を抑制することができるため、軸継手に一端部が連結されている工具保持軸、及び工具保持軸の他端部が嵌入されている軸受の昇温を抑制することができる。 In the machine tool according to the present invention, the drive source is an electric motor mounted outside the head portion, and the drive shaft and the one end portion of the electric motor are interlocked and connected in the cavity. A shaft coupling is provided, and the air blowing means is arranged at a position facing the shaft coupling or on the electric motor side of the shaft coupling.
In the present invention, the shaft coupling that is heat-transferred from the tool holding shaft and the electric motor can be cooled by the air blown from the blowing means, and the temperature rise of the shaft coupling can be suppressed. The temperature rise of the tool holding shaft whose one end is connected to the joint and the bearing in which the other end of the tool holding shaft is fitted can be suppressed.

本発明によれば、ヘッド部の空洞に配される工具保持軸の一端部を、空気吹出手段が吹出す空気により冷却することができるため、工具保持軸が長時間に亘って高速で連続回転する際に、該工具保持軸の昇温、及び工具保持軸の他端部が嵌入されている軸受の昇温を抑制することができ、軸受に塗布されている潤滑油脂の劣化を抑制でき、軸受及び工具保持軸の寿命を長くすることができるとともに、回転加工能力の持続時間を長くすることができる。   According to the present invention, since the one end portion of the tool holding shaft disposed in the cavity of the head portion can be cooled by the air blown by the air blowing means, the tool holding shaft continuously rotates at a high speed for a long time. In doing so, the temperature rise of the tool holding shaft and the temperature rise of the bearing in which the other end of the tool holding shaft is fitted can be suppressed, deterioration of the lubricating oil applied to the bearing can be suppressed, The lifetime of the bearing and the tool holding shaft can be increased, and the duration of the rotational machining capability can be increased.

また、本発明によれば、工具保持軸の一端部周りに配される部材に影響されることなく、工具保持軸の一端部を効率よく冷却することができる。   Moreover, according to this invention, the one end part of a tool holding shaft can be cooled efficiently, without being influenced by the member distribute | arranged around the one end part of a tool holding shaft.

また、本発明によれば、工具保持軸の一端部を冷却した後の空気を駆動源側の排気口から速やかに外部へ排気することができるため、空洞内に配してある工具保持軸の一端部の冷却効果を高めることができる。   In addition, according to the present invention, the air after cooling one end of the tool holding shaft can be quickly exhausted to the outside from the exhaust port on the drive source side, so that the tool holding shaft disposed in the cavity The cooling effect at the one end can be enhanced.

また、本発明によれば、既存のヘッド部に開設される貫通孔に筒体を嵌挿することにより、工具保持軸の一端部に向けて空気を吹出すことができるため、空気の吹出方向を容易に設定することができる。   In addition, according to the present invention, air can be blown out toward one end of the tool holding shaft by inserting a cylindrical body into a through-hole formed in an existing head portion. Can be set easily.

また、本発明によれば、空気の通気方向を変えて吹出すことができ、通気方向が変わる際に減圧することができるため、加圧空気源の空気圧が比較的高い場合においても比較的低圧の空気を、空気量を減らすことなく吹出すことができ、工具保持軸を除々に冷却することができる。   Further, according to the present invention, the air can be blown out by changing the aeration direction, and the pressure can be reduced when the aeration direction changes. Therefore, even when the air pressure of the pressurized air source is relatively high, the pressure is relatively low. The air can be blown out without reducing the amount of air, and the tool holding shaft can be gradually cooled.

また、本発明によれば、筒体の長手方向へ離隔した複数の吹出口から比較的低圧の空気を、空気量を減らすことなく吹出すことができるため、吹出空気を集中させることなく工具保持軸に向けて広範囲に吹出すことができ、工具保持軸を除々に冷却することができる。   In addition, according to the present invention, relatively low pressure air can be blown out from a plurality of outlets spaced apart in the longitudinal direction of the cylindrical body without reducing the amount of air, so that the tool can be held without concentrating the blown air A wide range can be blown out toward the shaft, and the tool holding shaft can be gradually cooled.

また、本発明によれば、工具保持軸及び電動モータから熱伝達される軸継手を、吹出手段から吹出す空気にて冷却することができ、軸継手の昇温を抑制することができるため、軸継手に一端部が連結されている工具保持軸、及び工具保持軸が嵌入されている軸受の昇温を抑制することができる。   In addition, according to the present invention, the shaft coupling heat transferred from the tool holding shaft and the electric motor can be cooled by the air blown from the blowing means, and the temperature rise of the shaft coupling can be suppressed. The temperature increase of the tool holding shaft whose one end is connected to the shaft coupling and the bearing in which the tool holding shaft is fitted can be suppressed.

本発明に係る工作機械のヘッド部分の構成を示す縦断側面図である。It is a vertical side view which shows the structure of the head part of the machine tool which concerns on this invention. 本発明に係る工作機械のヘッド部分の構成を示す正面図である。It is a front view which shows the structure of the head part of the machine tool which concerns on this invention. 本発明に係る工作機械のヘッド部分の構成を示す一部を分解した斜視図である。It is the perspective view which decomposed | disassembled one part which shows the structure of the head part of the machine tool which concerns on this invention. 本発明に係る工作機械の要部の構成を示す拡大断面図である。It is an expanded sectional view which shows the structure of the principal part of the machine tool which concerns on this invention. 本発明に係る工作機械の筒体の構成を示す斜視図である。It is a perspective view which shows the structure of the cylinder of the machine tool which concerns on this invention. 本発明に係る工作機械の筒体の構成を示す正面図である。It is a front view which shows the structure of the cylinder of the machine tool which concerns on this invention. 本発明に係る工作機械の筒体の構成を示す側面図である。It is a side view which shows the structure of the cylinder of the machine tool which concerns on this invention. 本発明に係る工作機械の要部の他の構成を示す拡大断面図である。It is an expanded sectional view showing other composition of the principal part of the machine tool concerning the present invention. 本発明に係る工作機械の要部の他の構成を示す拡大断面図である。It is an expanded sectional view showing other composition of the principal part of the machine tool concerning the present invention. 本発明に係る工作機械の要部の他の構成を示す拡大断面図である。It is an expanded sectional view showing other composition of the principal part of the machine tool concerning the present invention.

以下、本発明をその実施の形態を示す図面に基づいて詳述する。
実施の形態１
図１は本発明に係る工作機械のヘッド部分の構成を示す縦断側面図、図２はヘッド部分の構成を示す正面図、図３はヘッド部分の構成を示す一部を分解した斜視図、図４は要部の構成を示す拡大断面図である。 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
Embodiment 1
1 is a longitudinal side view showing the configuration of a head portion of a machine tool according to the present invention, FIG. 2 is a front view showing the configuration of the head portion, and FIG. 3 is a partially exploded perspective view showing the configuration of the head portion. 4 is an enlarged cross-sectional view showing the configuration of the main part.

図に示した工作機械は、同心上の軸長方向へ離隔した２位置の夫々に２個のアンギュラ玉軸受２を保持してあり、中心軸が上下となる軸受筒部１１及び該軸受筒部１１の上側が開放されている空洞１２を有する箱形状のヘッド部１と、その上端部が空洞１２に配され、下端部がアンギュラ玉軸受２の夫々に嵌入保持され、回転中心が上下となる工具保持軸３と、ヘッド部１の上部外側に装着され、駆動軸４１が空洞１２内に配されている電動モータ４と、工具保持軸３の上端部端末及び駆動軸４１を空洞１２内で連動連結する軸継手５と、空洞１２内に枢着され、工具保持軸３の下端部に保持される工具をアンクランプ用のレバー６と、工具保持軸３の上端部の側に向けて空気を吹出す筒体７とを備える。   The machine tool shown in the figure holds two angular contact ball bearings 2 at two positions spaced apart in a concentric axial length direction, and a bearing cylinder portion 11 having a central axis vertically and the bearing cylinder portion. 11 is a box-shaped head portion 1 having a cavity 12 that is open on the upper side, and an upper end portion thereof is disposed in the cavity 12, and a lower end portion is fitted and held in each of the angular ball bearings 2, and the center of rotation is up and down. The tool holding shaft 3, the electric motor 4 mounted on the upper outer side of the head portion 1, and the drive shaft 41 disposed in the cavity 12, the upper end portion of the tool holding shaft 3 and the drive shaft 41 are disposed in the cavity 12. The shaft coupling 5 to be interlocked and connected to the cavity 12 and the tool held at the lower end portion of the tool holding shaft 3 is directed toward the unclamping lever 6 and the upper end portion side of the tool holding shaft 3 with air. And a cylindrical body 7 for blowing out the water.

また、工作機械は、ワーク保持用のテーブルが横方向移動可能に装着されている基台（図示せず）と、該基台に固定したコラム（図示せず）とを備え、該コラムにヘッド部１が上下方向への移動を可能に装着されている。   The machine tool also includes a base (not shown) on which a workpiece holding table is mounted so as to be movable in the lateral direction, and a column (not shown) fixed to the base. The part 1 is mounted so as to be movable in the vertical direction.

ヘッド部１は、前後に長い箱形状をなし、前側（図１において右側）の下部に、上下に貫通する軸受孔１３を有する軸受筒部１１が配されている。該軸受筒部１１を除く他の部分の内部は、空洞１２になっている。軸受筒部１１の上側に第１の開口部１４が開設され、該第１の開口部１４の後側に第２の開口部１５が開設されている。第１の開口部１４には駆動軸４１が下向きとなるように電動モータ４が装着され、該電動モータ４のフランジ４２にて閉塞されている。第２の開口部１５には、長手方向中間部が枢着されているレバー６の他端部が挿通され、可撓性を有するシール環にて閉塞されている。空洞１２はほぼ密閉状態になっている。   The head portion 1 has a long box shape in front and rear, and a bearing tube portion 11 having a bearing hole 13 penetrating vertically is disposed at a lower portion on the front side (right side in FIG. 1). The inside of the other part excluding the bearing cylinder part 11 is a cavity 12. A first opening 14 is opened on the upper side of the bearing cylinder 11, and a second opening 15 is opened on the rear side of the first opening 14. The electric motor 4 is mounted in the first opening 14 so that the drive shaft 41 faces downward, and is closed by a flange 42 of the electric motor 4. The other end portion of the lever 6 pivotally attached to the second opening portion 15 is inserted into the second opening portion 15 and is closed by a flexible seal ring. The cavity 12 is almost sealed.

軸受筒部１１は、上下方向中間部が対向する側壁に連なり、上端部が空洞１２内に配され、下端部が空洞１２の外部に配されている。軸受筒部１１の上端部後側に筒体７が配されている。   The bearing tube portion 11 is connected to the side wall facing the intermediate portion in the vertical direction, and has an upper end portion disposed in the cavity 12 and a lower end portion disposed outside the cavity 12. A cylindrical body 7 is disposed on the rear side of the upper end portion of the bearing cylindrical portion 11.

軸受筒部１１は、上端側の大径孔部１３ａと、該大径孔部１３ａに段部を経て連なる小径孔部１３ｂとを有している。大径孔部１３ａと小径孔部１３ｂとの境界に段部が形成され、該段部に止輪が係止されている。小径孔部１３ｂの上側に、２個のアンギュラ玉軸受２，２の外輪が嵌入保持され、小径孔部１３の下側に、２個のアンギュラ玉軸受２，２の外輪が嵌入保持されている。上下のアンギュラ玉軸受２，２間に、大小二つの筒状スペーサ１６，１６が嵌合されている。アンギュラ玉軸受２，２夫々の内輪に工具保持軸３の下端部が嵌入されている。   The bearing tube portion 11 has a large-diameter hole portion 13a on the upper end side, and a small-diameter hole portion 13b connected to the large-diameter hole portion 13a via a stepped portion. A step portion is formed at the boundary between the large diameter hole portion 13a and the small diameter hole portion 13b, and a retaining ring is locked to the step portion. The outer rings of the two angular ball bearings 2 and 2 are fitted and held on the upper side of the small diameter hole portion 13b, and the outer rings of the two angular ball bearings 2 and 2 are fitted and held on the lower side of the small diameter hole portion 13. . Two large and small cylindrical spacers 16 and 16 are fitted between the upper and lower angular ball bearings 2 and 2. The lower end portion of the tool holding shaft 3 is fitted into the inner rings of the angular ball bearings 2 and 2.

ヘッド部１の一方の側壁の下部で、軸受筒部１１の上端部後側の位置に貫通孔１７が開設され、該貫通孔１７に、工具保持軸３の軸心と略直交する筒体７が嵌挿されている。一方の側壁で、第１の開口部１４の後側位置に排気口１８が開設され、該排気孔１８に排気管１９が接続されている。貫通孔１７の周りには複数の螺子孔が開設されている。ヘッド部１の後側外部は、回転中心が上下となる螺子軸、該螺子軸に相対回転を自在に螺合されている螺子環及び螺子軸を正逆回転させる第２の電動モータを有する昇降機構（図示せず）に装着されている。第２の電動モータの駆動によりヘッド部１が昇降可能になっている。ヘッド部１の上部後側には、レバー６の他端部に当接してレバー６を回動させるための操作体（図示せず）が装着されている。   A through hole 17 is opened at a position on the rear side of the upper end portion of the bearing cylinder portion 11 at a lower portion of one side wall of the head portion 1, and the cylinder body 7 substantially orthogonal to the axis of the tool holding shaft 3 is formed in the through hole 17. Is inserted. On one side wall, an exhaust port 18 is opened at a rear position of the first opening 14, and an exhaust pipe 19 is connected to the exhaust hole 18. A plurality of screw holes are formed around the through hole 17. The rear outside of the head unit 1 has a screw shaft whose rotation center is up and down, a screw ring screwed into the screw shaft so as to be relatively rotatable, and a second electric motor that rotates the screw shaft forward and backward. It is attached to a mechanism (not shown). The head unit 1 can be moved up and down by driving the second electric motor. On the upper rear side of the head portion 1, an operating body (not shown) for contacting the other end portion of the lever 6 and rotating the lever 6 is mounted.

工具保持軸３は、上端側の小径軸部３ａ及び該小径軸部３ａに段部３ｂを経て連なる下端側の大径軸部３ｃを有する円筒形である。該工具保持軸３の内部に、クランプフィンガ８１を有するロッド８が上下移動自在に嵌入されている。   The tool holding shaft 3 has a cylindrical shape having a small diameter shaft portion 3a on the upper end side and a large diameter shaft portion 3c on the lower end side connected to the small diameter shaft portion 3a via a step portion 3b. A rod 8 having a clamp finger 81 is fitted in the tool holding shaft 3 so as to be movable up and down.

工具保持軸３の段部３ｂは、下側アンギュラ玉軸受２の一方の内輪端面が当接している。小径軸部３ａの中間で、大径孔部１３ａ内に配される部分に螺子部３ｄが設けられている。該螺子部３ｄは、上側アンギュラ玉軸受２の一方の内輪端面に当接する螺子環３１が螺着している。該螺子環３１と段部３ｂは、アンギュラ玉軸受２夫々の内輪及び筒状スペーサ１６，１６を挾着し、工具保持軸３にアキシャル方向の予圧を加えている。   One inner ring end face of the lower angular ball bearing 2 is in contact with the step portion 3 b of the tool holding shaft 3. A screw portion 3d is provided in a portion disposed in the large-diameter hole portion 13a in the middle of the small-diameter shaft portion 3a. The screw portion 3d is screwed with a screw ring 31 that is in contact with one inner ring end face of the upper angular ball bearing 2. The screw ring 31 and the stepped portion 3b are attached to the inner ring of each of the angular ball bearings 2 and the cylindrical spacers 16 and 16, and apply a preload in the axial direction to the tool holding shaft 3.

小径軸部３ａの上端部３ｆには、径方向に貫通し、上下に長い長孔３２が設けられている。長孔３２には連結ピン３３が挿通され、該連結ピン３３の中央部にロッド８の上端部が連結されている。   A long hole 32 extending vertically is provided in the upper end portion 3f of the small diameter shaft portion 3a. A connecting pin 33 is inserted into the long hole 32, and the upper end of the rod 8 is connected to the center of the connecting pin 33.

大径軸部３ｃの内側には、円錐台形をなす保持孔部３ｅが設けられており、該保持孔部３ｅに工具１０が下方から挿嵌される。該工具１０の上側端部はクランプフィンガ８１にクランプされる。   A holding hole 3e having a truncated cone shape is provided inside the large-diameter shaft 3c, and the tool 10 is inserted into the holding hole 3e from below. The upper end of the tool 10 is clamped by a clamp finger 81.

工具保持軸３内のロッド８は、下端にクランプフィンガ８１が保持され、上端が連結ピン３３の中央部に連結され、上下に移動可能になっている。また、ロッド８周りにコイルばね９を配し、該コイルばね９はロッド８を常に上方へ付勢する。コイルばね９によりクランプフィンガ８１は、工具１０をクランプする。   The rod 8 in the tool holding shaft 3 has a clamp finger 81 held at the lower end, and the upper end is connected to the central portion of the connecting pin 33 so that it can move up and down. Further, a coil spring 9 is disposed around the rod 8, and the coil spring 9 always urges the rod 8 upward. The clamp finger 81 clamps the tool 10 by the coil spring 9.

レバー６は、略く字形をなし、空洞１２内に配されて中央屈曲部が枢軸にてヘッド部１の側壁に枢着されている。レバー６の一端部は、二又部形状になっており、該二又部が連結ピン３３の両端部周面に対向している。レバー６の他端部は操作体の往復動作に連動する。操作体の往動によりレバー６の一端部が下動し、該二又部が連結ピン３３を押圧してロッド８を下動させ、工具１０がアンクランプ状態となる。操作体の復動によりレバー６の一端部が上動し、コイルばね９の付勢力にてロッド８は上動し、工具１０がクランプ状態となる。   The lever 6 has a substantially square shape, is disposed in the cavity 12, and a central bent portion is pivotally attached to the side wall of the head portion 1 by a pivot. One end of the lever 6 has a bifurcated shape, and the bifurcated portion is opposed to the peripheral surfaces of both ends of the connecting pin 33. The other end of the lever 6 is interlocked with the reciprocating motion of the operating body. One end of the lever 6 is moved downward by the forward movement of the operating body, the bifurcated portion presses the connecting pin 33 to move the rod 8 downward, and the tool 10 is in an unclamped state. One end of the lever 6 is moved upward by the backward movement of the operating body, the rod 8 is moved upward by the biasing force of the coil spring 9, and the tool 10 is clamped.

図５は筒体の構成を示す斜視図、図６は筒体の構成を示す正面図、図７は筒体の構成を示す側面図である。筒体７は有底であり、周方向の一箇所で径方向に貫通する三つの吹出口７１が長手方向へ離隔して開設されている。筒体７の一端部はヘッド部１の貫通孔１７に嵌入される。筒体７は軸受筒部１１の上端部後側の位置に、換言すると軸受筒部１１から上方へ突出する工具保持軸３の上端部３ｆよりも下側の位置に、工具保持軸３の軸心と略直交するように配され、吹出口７１が斜め上方（上端部３ｆの方向）へ向かう。吹出口７１の総開口面積は、筒体７内の孔の断面積とほぼ等しく、筒体７内の孔に供給される空気量が減ることなく吹出口７１夫々から上端部３ｆの方向へ吹出す。   5 is a perspective view showing the configuration of the cylinder, FIG. 6 is a front view showing the configuration of the cylinder, and FIG. 7 is a side view showing the configuration of the cylinder. The cylindrical body 7 has a bottom, and three outlets 71 penetrating in the radial direction at one place in the circumferential direction are opened apart in the longitudinal direction. One end of the cylinder 7 is fitted into the through hole 17 of the head 1. The cylindrical body 7 is positioned at the rear side of the upper end portion of the bearing cylindrical portion 11, in other words, at a position lower than the upper end portion 3 f of the tool holding shaft 3 protruding upward from the bearing cylindrical portion 11. Arranged so as to be substantially orthogonal to the center, the air outlet 71 is directed obliquely upward (in the direction of the upper end 3f). The total opening area of the air outlet 71 is substantially equal to the cross-sectional area of the hole in the cylinder 7, and the air amount supplied to the hole in the cylinder 7 is reduced from each of the air outlets 71 in the direction of the upper end portion 3 f. put out.

三つの吹出口７１のうち、中央の吹出口７１が工具保持軸３の軸心と対向する位置に配され、他の二つの吹出口７１は工具保持軸３の上端部３ｆの直径と同程度の距離で離隔して配されている。筒体７は吹出空気を上端部３ｆに集中させることなく、上端部３ｆ周りに亘って分散して斜め上方へ吹出す。   Of the three air outlets 71, the central air outlet 71 is disposed at a position facing the axis of the tool holding shaft 3, and the other two air outlets 71 have the same diameter as the upper end portion 3 f of the tool holding shaft 3. Are separated by a distance of The cylindrical body 7 is distributed over the upper end portion 3f and blown obliquely upward without concentrating the blown air on the upper end portion 3f.

筒体７の開放されている一端部端末には鍔部７２が設けられ、該鍔部７２に開設されている挿通孔７３に雄螺子が挿通され、側壁の螺子孔に螺入されることにより、筒体７がヘッド部１に取付けられる。   A flange 72 is provided at the open end of the cylindrical body 7, and a male screw is inserted into the insertion hole 73 formed in the flange 72 and screwed into a screw hole on the side wall. The cylinder 7 is attached to the head unit 1.

筒体７の鍔部７２側開放端には管継手７４が接続されている。該管継手７４は、工場内に配設されているコンプレッサ等の加圧空気源に連なる送気管に接続されている。送気管は、途中に開閉弁が設けられ、該開閉弁の開動作により清浄な空気を筒体７に供給する。   A pipe joint 74 is connected to the open end of the cylindrical body 7 on the flange 72 side. The pipe joint 74 is connected to an air supply pipe connected to a pressurized air source such as a compressor disposed in the factory. The air supply pipe is provided with an on-off valve in the middle, and supplies clean air to the cylinder body 7 by opening the on-off valve.

以上のように構成された工作機械は、工具保持軸３の下側開口に工具１０の端部が挿嵌され、操作体にてレバー６の一端部が上動し、コイルばね９にてロッド８を経てクランプフィンガ８１が上動し、工具１０の上側端部がクランプされている。   In the machine tool configured as described above, the end portion of the tool 10 is inserted into the lower opening of the tool holding shaft 3, the one end portion of the lever 6 is moved upward by the operating body, and the rod is moved by the coil spring 9. 8, the clamp finger 81 moves upward, and the upper end of the tool 10 is clamped.

この状態で電動モータ４が駆動され、軸継手５を経て工具保持軸３が高速で回転する。また、第２の電動モータの駆動により、螺子軸が回転し、該螺子軸に相対回転を自在に螺合されている螺子環と一体にヘッド部１が昇降し、テーブルに保持されているワークに前記工具１０にて回転加工が施される。   In this state, the electric motor 4 is driven, and the tool holding shaft 3 rotates at high speed via the shaft coupling 5. In addition, the screw shaft is rotated by the driving of the second electric motor, and the head portion 1 is moved up and down integrally with the screw ring that is screwed into the screw shaft so as to be relatively rotatable, and the workpiece is held on the table. The tool 10 is rotated.

筒体７には連続的に、又は間歇的に加圧空気源から清浄な空気が供給され、該筒体７の三つの吹出口７１から工具保持軸３の空洞１２内に配されている上端部３ｆに向けて空気が吹出され、吹出空気により工具保持軸３の上端部３ｆを除々に冷却することができる。この上端部３ｆの冷却により、工具保持軸３の昇温が抑制される。よって、工具保持軸３が高速で連続回転することにより、アンギュラ玉軸受２部分が昇温する場合、吹出空気により昇温が抑制されている工具保持軸３の熱が下端部からアンギュラ玉軸受２に伝熱され、該アンギュラ玉軸受２の昇温を抑制でき、アンギュラ玉軸受２に塗布されている潤滑油脂の熱による劣化を抑制でき、潤滑油脂の寿命、ひいてはアンギュラ玉軸受２及び工具保持軸３の耐久性を高めることができる。また、工具保持軸３の昇温を抑制することができることにより、螺子環３１にて工具保持軸３に加えられている予圧が低下するのを抑制でき、工具保持軸３の剛性の低下を抑制できる。   The cylinder 7 is supplied with clean air from a pressurized air source continuously or intermittently, and the upper end is arranged in the cavity 12 of the tool holding shaft 3 from the three outlets 71 of the cylinder 7. Air is blown toward the portion 3f, and the upper end portion 3f of the tool holding shaft 3 can be gradually cooled by the blown air. The temperature of the tool holding shaft 3 is suppressed by cooling the upper end portion 3f. Therefore, when the temperature of the angular contact ball bearing 2 is increased by continuously rotating the tool holding shaft 3 at a high speed, the heat of the tool holding shaft 3 whose temperature increase is suppressed by the blown air is from the lower end portion to the angular contact ball bearing 2. The angular ball bearing 2 can be prevented from rising in temperature, and the grease and grease applied to the angular ball bearing 2 can be prevented from being deteriorated by heat. 3 durability can be improved. Further, since the temperature rise of the tool holding shaft 3 can be suppressed, it is possible to suppress a decrease in the preload applied to the tool holding shaft 3 by the screw ring 31 and to suppress a decrease in rigidity of the tool holding shaft 3. it can.

実施の形態２
図８は本発明に係る工作機械の要部の他の構成を示す拡大断面図である。この工作機械は、空気吹出手段として吹出口７１を有する筒体７を用いる代わりに、ヘッド部１の前壁１ｂで、工具保持軸３の空洞１２に配されている上端部３ｆと対向する位置に第２の貫通孔１７ａを開設している。第２の貫通孔１７ａに、複数の吹出口２０ａ及び該吹出口２０ａに連通する連通路２０ｂを有する空気吹出部材２０を取付けている。該空気吹出部材２０は、吹出口２０ａから上端部３ｆの側へ空気を吹出し、上端部３ｆを冷却して工具保持軸３の昇温を抑制する。
その他の構成及び作用は実施の形態１と同様であるため、同様の部品については同じ符号を付し、その詳細な説明及び作用の説明を省略する。 Embodiment 2
FIG. 8 is an enlarged cross-sectional view showing another configuration of the main part of the machine tool according to the present invention. In this machine tool, instead of using the cylinder body 7 having the air outlet 71 as the air blowing means, the front wall 1b of the head portion 1 is opposed to the upper end portion 3f disposed in the cavity 12 of the tool holding shaft 3. The second through hole 17a is opened. An air blowing member 20 having a plurality of air outlets 20a and a communication passage 20b communicating with the air outlets 20a is attached to the second through hole 17a. The air blowing member 20 blows air from the air outlet 20a toward the upper end 3f, cools the upper end 3f, and suppresses the temperature rise of the tool holding shaft 3.
Since other configurations and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and detailed descriptions and descriptions of the operations are omitted.

実施の形態３
図９は本発明に係る工作機械の要部の他の構成を示す拡大断面図である。この工作機械は、工具保持軸３の上端部３ｆに向けて空気を吹出す代わりに、ヘッド部１の軸継手５周面と対向する位置に第３の貫通孔１７ｂを開設し、該第３の貫通孔１７ｂに、一つ又は複数の吹出口２１ａを有する空気吹出部材２１を接続している。該空気吹出部材２１は吹出口２１ａから軸継手５に向けて空気を吹出し、吹出空気にて軸継手５を冷却することにより、該軸継手５に上端部３ｆが結合されている工具保持軸３の昇温を抑制する。
その他の構成及び作用は実施の形態１と同様であるため、同様の部品については同じ符号を付し、その詳細な説明及び作用の説明を省略する。 Embodiment 3
FIG. 9 is an enlarged cross-sectional view showing another configuration of the main part of the machine tool according to the present invention. In this machine tool, instead of blowing air toward the upper end portion 3f of the tool holding shaft 3, a third through hole 17b is opened at a position facing the peripheral surface of the shaft joint 5 of the head portion 1, and the third The air blowing member 21 having one or a plurality of air outlets 21a is connected to the through hole 17b. The air blowing member 21 blows air from the air outlet 21a toward the shaft coupling 5, and cools the shaft coupling 5 with the blown air, whereby the tool holding shaft 3 having the upper end portion 3f coupled to the shaft coupling 5. Suppresses the temperature rise.
Since other configurations and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and detailed descriptions and descriptions of the operations are omitted.

実施の形態４
図１０は本発明に係る工作機械の要部の他の構成を示す拡大断面図である。この工作機械は、軸継手５に向けて直接空気を吹出す代わりに、軸継手５よりも上側で、電動モータ４のフランジ４２が取付けられる部分に、空洞１２に開口する第４の貫通孔１７ｃを開設し、該第４の貫通孔１７ｃに空気吹出部材２２を接続している。該空気吹出部材２２は、その先端からフランジ４２周りに空気を吹出し、フランジ４２周りから空洞１２内の軸継手５の上端部に向けて空気を吹出し、吹出空気にて軸継手５を冷却することにより、該軸継手５に上端部３ｆが結合されている工具保持軸３の昇温を抑制する。
その他の構成及び作用は実施の形態１と同様であるため、同様の部品については同じ符号を付し、その詳細な説明及び作用の説明を省略する。 Embodiment 4
FIG. 10 is an enlarged cross-sectional view showing another configuration of the main part of the machine tool according to the present invention. In this machine tool, instead of blowing air directly toward the shaft coupling 5, a fourth through hole 17 c that opens to the cavity 12 is provided above the shaft coupling 5 in a portion where the flange 42 of the electric motor 4 is attached. And the air blowing member 22 is connected to the fourth through hole 17c. The air blowing member 22 blows air around the flange 42 from its tip, blows air from around the flange 42 toward the upper end of the shaft coupling 5 in the cavity 12, and cools the shaft coupling 5 with the blown air. Thus, the temperature rise of the tool holding shaft 3 whose upper end portion 3f is coupled to the shaft coupling 5 is suppressed.
Since other configurations and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and detailed descriptions and descriptions of the operations are omitted.

尚、以上説明した実施の形態では、工具保持軸３を支持する軸受としてアンギュラ玉軸受２を用いたが、その他、ころ軸受であってもよく、軸受の構成は特に制限されない。   In the embodiment described above, the angular ball bearing 2 is used as a bearing for supporting the tool holding shaft 3. However, a roller bearing may be used, and the configuration of the bearing is not particularly limited.

また、以上説明した実施の形態では、空気吹出手段としての筒体７を、空洞１２に配される上端部３ｆよりも下側の位置に配し、上端部３ｆの側へ斜め上方に空気を吹出すように構成したが、その他、上端部３ｆの横側に配し、上端部３ｆの径方向へ空気を吹出すように構成してもよいし、また、上端部３ｆの横側に配し、上端部３ｆに向けて斜め下方へ空気を吹出すように構成してもよく、筒体７の配置箇所、及び吹出方向は特に制限されない。   In the embodiment described above, the cylinder 7 as the air blowing means is arranged at a position lower than the upper end portion 3f arranged in the cavity 12, and air is obliquely upward toward the upper end portion 3f. Although it is configured to blow out, it may be arranged on the side of the upper end 3f and air may be blown in the radial direction of the upper end 3f, or may be arranged on the side of the upper end 3f. However, the air may be blown obliquely downward toward the upper end 3f, and the arrangement location of the cylinder 7 and the blowing direction are not particularly limited.

また、以上説明した実施の形態では、空気吹出手段としての筒体７を用いたが、その他、筒体７をなくし、ヘッド部１の貫通孔１７に空気吹出管を接続し、該空気吹出管から空洞１２内に吹出された空気を上端部３ｆに向けて案内する案内壁を有する構成としてもよい。   Further, in the embodiment described above, the cylindrical body 7 is used as the air blowing means. However, the cylindrical body 7 is eliminated, and an air blowing pipe is connected to the through hole 17 of the head portion 1, and the air blowing pipe is used. It is good also as a structure which has a guide wall which guides the air blown in in the cavity 12 toward the upper end part 3f.

また、以上説明した実施の形態では、ヘッド部１に排気口１８を設けたが、その他、排気専用の排気口がなく、例えば第２の開口部１５の一部を外部に開放させ、空気吹出手段から空洞１２に供給された空気を外部へ排気するように構成してもよい。   Further, in the embodiment described above, the exhaust port 18 is provided in the head unit 1, but there is no other exhaust port dedicated to exhaust. For example, a part of the second opening 15 is opened to the outside, and the air blowing is performed. You may comprise so that the air supplied to the cavity 12 from the means may be exhausted outside.

１ ヘッド部
１２ 空洞
１３ 軸受孔
１７ 貫通孔
１８ 排気口
２ アンギュラ玉軸受（軸受）
３ 工具保持軸
３ｆ 上端部（一端部）
４ 電動モータ（駆動源）
４１ 駆動軸
５ 軸継手
７ 筒体（空気吹出手段）
７１ 吹出口 DESCRIPTION OF SYMBOLS 1 Head part 12 Cavity 13 Bearing hole 17 Through-hole 18 Exhaust port 2 Angular contact ball bearing (bearing)
3 Tool holding shaft 3f Upper end (one end)
4 Electric motor (drive source)
41 drive shaft 5 shaft coupling 7 cylinder (air blowing means)
71 Air outlet

Claims (7)

空洞を有するヘッド部を内外に貫通する軸受孔に軸受を保持してあり、該軸受に工具保持軸を嵌入支持してあり、該工具保持軸の空洞側の一端部が駆動源に連動連結されている工作機械において、前記一端部の側へ空気を吹出す空気吹出手段を備えることを特徴とする工作機械。   A bearing is held in a bearing hole penetrating the inside and outside of a head portion having a cavity, and a tool holding shaft is fitted and supported in the bearing, and one end portion on the cavity side of the tool holding shaft is interlocked and connected to a drive source. A machine tool comprising air blowing means for blowing air to the one end side. 前記空気吹出手段は、前記一端部よりも前記軸受孔側に配してある請求項１記載の工作機械。   The machine tool according to claim 1, wherein the air blowing means is disposed closer to the bearing hole than the one end. 前記ヘッド部は、前記空気吹出手段よりも前記駆動源側に排気口を開設してある請求項１又は２に記載の工作機械。   3. The machine tool according to claim 1, wherein the head portion has an exhaust port on the drive source side with respect to the air blowing means. 4. 前記空気吹出手段は、吹出口を有し、前記ヘッド部に嵌挿されている筒体である請求項１から３のいずれか一つに記載の工作機械。   The machine tool according to any one of claims 1 to 3, wherein the air blowing means is a cylindrical body having a blowout opening and fitted into the head portion. 前記筒体は、前記工具保持軸の周面から離隔した位置で、且つ該工具保持軸の軸心と交差する位置に配され、該筒体の周面に前記吹出口が開設されている請求項４記載の工作機械。   The cylindrical body is disposed at a position spaced apart from the peripheral surface of the tool holding shaft and at a position intersecting with the axial center of the tool holding shaft, and the air outlet is opened on the peripheral surface of the cylindrical body. Item 5. The machine tool according to Item 4. 前記筒体の長手方向へ離隔した複数の位置に前記吹出口を配してある請求項５記載の工作機械。   The machine tool according to claim 5, wherein the air outlets are arranged at a plurality of positions separated in the longitudinal direction of the cylindrical body. 前記駆動源は、前記ヘッド部の外部に装着されている電動モータであり、該電動モータの駆動軸及び前記一端部を前記空洞内で連動連結してある軸継手を備え、該軸継手と対向する位置又は該軸継手よりも前記電動モータ側に前記空気吹出手段を配してある請求項１記載の工作機械。   The drive source is an electric motor mounted on the outside of the head unit, and includes a shaft coupling in which the drive shaft of the electric motor and the one end are interlocked and connected in the cavity, and is opposed to the shaft coupling. The machine tool according to claim 1, wherein the air blowing means is disposed closer to the electric motor than the position of the shaft coupling or the shaft coupling.
JP2011068434A 2011-03-25 2011-03-25 Machine Tools Active JP5782773B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2011068434A JP5782773B2 (en) 2011-03-25 2011-03-25 Machine Tools
KR1020120026458A KR101387824B1 (en) 2011-03-25 2012-03-15 Machine tool
CN2012201153104U CN202528008U (en) 2011-03-25 2012-03-23 Machine tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011068434A JP5782773B2 (en) 2011-03-25 2011-03-25 Machine Tools

Publications (2)

Publication Number Publication Date
JP2012200825A true JP2012200825A (en) 2012-10-22
JP5782773B2 JP5782773B2 (en) 2015-09-24

Family

ID=47129216

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2011068434A Active JP5782773B2 (en) 2011-03-25 2011-03-25 Machine Tools

Country Status (3)

Country Link
JP (1) JP5782773B2 (en)
KR (1) KR101387824B1 (en)
CN (1) CN202528008U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016083770A (en) * 2016-02-01 2016-05-19 住友化学株式会社 Cutting method and cutting device, manufacturing method for optical member

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109702536A (en) * 2019-02-12 2019-05-03 山东卡洛德数控设备有限公司 A kind of numerically-controlled machine tool power head limiting device
CN115255412A (en) * 2022-08-16 2022-11-01 高崎智能装备(丽水)有限公司 High-precision main shaft of machining center

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5541254U (en) * 1978-09-11 1980-03-17
JPS60178535U (en) * 1984-05-02 1985-11-27 三菱電機株式会社 Electric discharge machining equipment
US5290130A (en) * 1992-06-22 1994-03-01 San Rocco Donzelli Industriale S.P.A. Machine tool and method of cooling rotary parts thereof
JPH07164208A (en) * 1993-12-16 1995-06-27 Fanuc Ltd Cutting fluid invasion preventing device for bearing part of machine tool spindle
JP2002346860A (en) * 2001-05-25 2002-12-04 Mitsubishi Heavy Ind Ltd Device for suppressing thermal displacement and machine tool
JP2009214187A (en) * 2008-03-07 2009-09-24 Brother Ind Ltd Machine tool

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07290344A (en) * 1994-04-21 1995-11-07 Howa Mach Ltd Cooling method and device for spindle head
JPH0929582A (en) * 1995-07-17 1997-02-04 Howa Mach Ltd Cooling device for spindle head

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5541254U (en) * 1978-09-11 1980-03-17
JPS60178535U (en) * 1984-05-02 1985-11-27 三菱電機株式会社 Electric discharge machining equipment
US5290130A (en) * 1992-06-22 1994-03-01 San Rocco Donzelli Industriale S.P.A. Machine tool and method of cooling rotary parts thereof
JPH07164208A (en) * 1993-12-16 1995-06-27 Fanuc Ltd Cutting fluid invasion preventing device for bearing part of machine tool spindle
JP2002346860A (en) * 2001-05-25 2002-12-04 Mitsubishi Heavy Ind Ltd Device for suppressing thermal displacement and machine tool
JP2009214187A (en) * 2008-03-07 2009-09-24 Brother Ind Ltd Machine tool

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016083770A (en) * 2016-02-01 2016-05-19 住友化学株式会社 Cutting method and cutting device, manufacturing method for optical member

Also Published As

Publication number Publication date
KR101387824B1 (en) 2014-04-22
CN202528008U (en) 2012-11-14
JP5782773B2 (en) 2015-09-24
KR20120109312A (en) 2012-10-08

Similar Documents

Publication Publication Date Title
JP5935049B2 (en) Tool turret for machining a workpiece and a machining apparatus equipped with this kind of tool turret
JP5484315B2 (en) Rotary table device with cooling structure
US8967864B2 (en) Main spindle device of machine tool
KR102109654B1 (en) Friction stir welding device
JP5464879B2 (en) Machine Tools
JP5782773B2 (en) Machine Tools
JP5475408B2 (en) Rotary table with air seal structure
JP4861038B2 (en) Adapter, adapter cooling method and friction stir welding method
WO2019182048A1 (en) Main spindle device of machine tool
JP2005028558A (en) Cooling mechanism of drive shaft in parallel link mechanism
JP6737846B2 (en) Spindle device
JP5726484B2 (en) Rolling bearing unit
JP6725594B2 (en) Spindle device
JP4720823B2 (en) Processing equipment
JP2012200826A (en) Machine tool
JP7016787B2 (en) Spindle for rotary tools
JP2009214187A (en) Machine tool
JP2009066737A (en) Spindle unit
JP6280149B2 (en) Machine tool spindle equipment
JP2009243662A (en) Rotary bearing, and rotary table device
JP2010091035A (en) Gas balancer
JP3448732B2 (en) Lead screw cooling system
JP2009197942A (en) Gas bearing spindle
US5282390A (en) Industrial robot with means for cooling a linear motion nut and screw shaft
JP2011235403A (en) Spindle device for machine tool

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20130830

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20140417

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20140422

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20140616

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20141125

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20150121

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20150623

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20150706

R150 Certificate of patent or registration of utility model

Ref document number: 5782773

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150