WO2008046295A1

WO2008046295A1 - An intergrative chuck device of machine tool

Info

Publication number: WO2008046295A1
Application number: PCT/CN2007/002853
Authority: WO
Inventors: Hai Ren
Original assignee: Hai Ren
Priority date: 2006-10-11
Filing date: 2007-09-29
Publication date: 2008-04-24
Also published as: CN1931485A

Abstract

An integrative chuck device of machine tool includes a frame (6), a spindle (7), bearing (11) and a chuck (4) supported on the spindle. The chuck device also includes a primary stator frame (9) of a planar ring rotation motor, which is fixed on the spindle, a primary stator planar ring (1) at one side of the stator frame, a secondary rotor planar ring (2). Wherein the primary stator planar ring and the secondary rotor planar ring keep a distance face to face and form electromagnetic air gap. The device in the invention makes the configuration of the machine tool simpler and the volume smaller because of the integration of the motor and the chuck.

Description

Integrated machine tool chuck

The present invention relates to a machine tool component, and more particularly to an electromechanical machine tool chuck that closely combines a motor structure and a machine chuck structure. Background technique

In the traditional machine tool technology, whether it is a horizontal machine tool, a vertical machine tool, an automatic machine tool, a CNC machine tool, a frequency conversion machine tool, etc., there is a large and expensive machine tool spindle box, which is provided with a gear shifting gear set and a transmission shaft. , clutch, etc., to achieve the transmission and control of the machine wheel chuck rotation speed and torque, the spindle box structure is complex, bulky, requires high processing precision, low energy transfer efficiency, making machine tools expensive, high energy consumption, making traditional machine tool products Processing and manufacturing costs remain high.

In order to overcome the above-mentioned drawbacks of conventional machine tools, there has been a frequency conversion machine that does not use a complete headstock. Although the variable frequency machine greatly simplifies the structure of the headstock, the belt drive of the two pulleys and one belt is used to transmit the rotational torque of the motor to the machine chuck. The following defects still exist:

1. The rotating torque of the variable frequency machine tool is transmitted to the chuck through the belt drive. The drive shaft of the machine structure must include the motor shaft, two pulleys, belts and chucks, so that the volume of the machine tool is still large;

2. Due to the large number of components in the transmission chain, the requirements for manufacturing and assembly precision are high, which makes the manufacturing system of the machine tool higher;

3, belt drive efficiency is low, energy loss is large, so the frequency conversion machine is inefficient. Summary of the invention

The technical problem to be solved by the present invention is to provide an integrated machine tool chuck that overcomes the above-mentioned drawbacks of the prior art variable frequency machine tool.

The technical solution adopted by the present invention to solve the technical problem is: constructing an integrated machine tool chuck, comprising a frame 6, a machine tool spindle 7 fixedly connected to the frame, a bearing 11 and an axial positioning and vertical through the bearing Rotating a chuck 4 supported on the spindle of the machine tool, characterized in that: further comprising the card

Confirmation a flat ring rotating motor primary stator frame on the rear end side of the disk and fixedly connected to the machine tool spindle

9. A primary stator planar torus 1 disposed on a side of the primary stator frame and a supply conductor connecting the primary stator planar toroidal coil windings 13, the chuck including a planar toroidal rotary motor disposed thereon The secondary rotor planar torus 2 is spaced from the secondary rotor planar torus and forms an electromagnetic field air gap 3.

In the integrated machine tool chuck of the present invention, the chuck includes an extended portion 5 of an outer circular shell side extending toward a rear end thereof, the primary stator planar annular body being disposed on both side surfaces of the primary stator frame Or on either side surface, the secondary rotor planar torus is disposed on the rear end surface of the chuck or on the extension corresponding to the primary stator planar torus.

In the integrated machine tool chuck of the present invention, the machine tool spindle 7 is a cylindrical hollow structure. In the integrated machine tool chuck of the present invention, the electromagnetic field is formed between the chuck, the chuck extension, the primary stator frame, the primary stator planar torus, the secondary rotor planar torus and the machine tool spindle The air gap is an open confined space comprising a compressed air tube that enters the confined space through the primary stator frame or the machine tool spindle or the air gap.

In the integrated machine tool chuck of the present invention, a shallow groove disposed on the surface of the machine tool spindle in the axial direction is included, and the compressed air pipe enters the sealed space through the shallow groove.

In the integrated machine tool chuck of the present invention, a plurality of air blowing nozzles disposed inside the sealed space, opening toward the electromagnetic field air gap and spaced along the circumference of the primary stator plane annular body, the blowing The gas nozzle is in communication with the compressed air tube.

In the integrated machine tool chuck of the present invention, the axial positioning of the chuck on the main shaft is achieved by positioning a positioning step on a position corresponding to the bearing on the main shaft, and one end of the bearing and The positioning step is cooperatively positioned, and the other end of the bearing is positioned by the axially positioned outer bearing end cap or is matched with a limit nut threadedly engaged with the end of the spindle, and the threaded screw thread of the limiting nut is matched with the screw The chucks rotate in the same direction.

In the integrated machine tool chuck of the present invention, the axial positioning of the chuck on the main shaft is realized by: positioning a positioning ring disposed along the axial direction corresponding to the mounting position of the bearing on the main shaft, One end of the bearing is cooperatively positioned with the positioning ring, and the other end of the bearing is positioned by an axially positioned outer bearing end cap or is engaged with a limit nut threadedly engaged with the end of the spindle, the limit nut threadedly engaged The thread is rotated in the same direction as the chuck.

In the integrated machine tool chuck of the present invention, the axial positioning of the chuck on the spindle is achieved by: the mounting position of the spindle corresponding to the bearing is disposed in a bearing that is screwed to the spindle An end cap, the threaded end of the threaded end of the bearing is in the same direction of rotation as the chuck; one end of the bearing is positioned by the inner end cap of the bearing, and the other end of the bearing is axially positioned The outer end cap is positioned or mated with a limit nut threadedly engaged with the end of the spindle, and the threaded screw of the limit nut is threaded in the same direction as the chuck.

In the integrated machine tool chuck of the present invention, the fixed connection structure of the primary stator frame and the main shaft is: the primary stator frame is integrally formed with the main shaft or the primary stator frame is detachable Fixedly attached to the spindle.

Compared with the prior art, the integrated machine tool chuck embodying the present invention has the following beneficial effects:

1. By mechanically combining the motor structure and the chuck structure, the mechanical transmission chain between the motor and the chuck is omitted, the machine structure is greatly simplified, the machine tool volume is reduced, the manufacturing cost of the machine tool is reduced, and the raw material consumption is saved;

2. The output power of the motor directly reaches the chuck for workpiece processing, which greatly reduces the transmission loss of the motor output power, improves the useful power, which improves the power utilization efficiency of the machine tool, realizes energy saving and reduces the product of the machine tool. Processing cost;

3. The simplification of the machine structure greatly reduces the failure rate of the machine tool, improves the reliability of the machine tool, simplifies the use and maintenance of the machine tool, and reduces the use and maintenance costs. DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is an embodiment of an integrated machine tool chuck of the present invention.

In Fig. 1: 1 is the primary stator plane torus of the planar toroidal rotating machine; 2 is the secondary rotor plane torus of the planar toroidal rotating machine; 3 is the toroidal rotating electromagnetic field air gap of the planar toroidal rotating electrical machine Space; 4 is the machine chuck; 5 is the extension of the outer casing edge of the machine chuck 4, 6 is the spindle frame (including the spindle frame seat) installed at the end of the horizontal machine (or vertical machine); 7 is a cylindrical hollow main shaft fixedly mounted on the main shaft frame 6; 8 is a shallow groove provided on the outer surface of the main shaft 7, with Laying a compressed air tube and/or a supply wire; 9 is a planar ring rotating machine primary stator plane torus

The ring body of 1 is fastened to the connecting frame; 10 is the frame seat of the ring body of the motor primary stator plane torus 1 fastened to the frame 9; 11 is a bearing, and the machine chuck 4 is rotatably supported by the spindle 7 12; is the bearing outer end cover; 13 is the motor coil winding of the plane ring toroidal rotary motor primary stator plane torus 1; 14 is the inner ring inner plane of the machine chuck 4. detailed description

In the embodiment shown in FIG. 1, the integrated machine tool chuck of the present invention comprises a spindle frame 6 (including a frame base), a machine tool spindle 7 fixedly coupled to the spindle frame 6, a machine chuck 4, a bearing 1 1 , a primary stator frame 9 of a planar toroidal rotating electrical machine, and a primary stator planar torus 1 disposed on a side surface of the primary stator frame 9 opposite the rear end surface of the chuck 4, the machine chuck 4 passing through the bearing 1 1 axially positioned and vertically rotatably supported on the machine tool spindle 7, the rear end of the machine chuck 4 extends an outer circular shell edge extension portion 5, and a primary stator plane ring is disposed on the rear end surface of the machine chuck 4 The body 1 opposes and maintains the secondary rotor plane torus 2 of the electromagnetic field air gap space 3, and the coil winding 13 of the primary stator plane torus 1 is connected to the power source through a conductive wire (not shown), the primary stator A rotating electromagnetic field moment is generated between the planar torus 1 and the secondary rotor planar torus 2, thereby propelling the machine chuck 4 to rotate in the design direction.

The invention fully utilizes the planar circular ring rotation motion of the plane ring toroidal rotating machine primary stator plane torus and the secondary rotor plane torus and their respective torus surfaces and the toroidal electromagnetic field air gap space formed by the same They are mechanical and physical properties perpendicular to their axis, which closely combines the motor structure with the machine tool spindle and chuck structure.

In other embodiments, the primary stator planar torus 1 may be disposed on the outer side surface of the primary stator frame 9, and correspondingly, the secondary planar rotor torus 2 is disposed on the extension 5 and with the primary stator planar ring The body 1 is opposite to and constitutes an electromagnetic field air gap space 3, and the secondary plane rotor torus 2 may be fixedly attached to the inner side surface of the extension portion 5, or the secondary rotor plane torus 2 may be provided at the end of the extension portion 5. A connection structure is mounted to securely attach the secondary rotor planar torus 2 to the mounting connection structure.

In other embodiments, the primary stator planar torus 1 may be disposed in two of the primary stator frame 9 On the side surface, correspondingly, the secondary rotor planar torus 2 is disposed on the extension 5 and the rear end face of the chuck and is opposed to the primary stator planar torus 1 and constitutes an electromagnetic field air gap space 3. The secondary rotor planar torus 2 is fixedly attached to the extension 5 as described above.

As shown in Fig. 1, the machine tool spindle 7 of the present embodiment adopts a cylindrical hollow spindle structure. In other embodiments, the machine tool spindle 7 can also adopt a solid shaft or the like.

The primary stator planar torus 1 of the planar toroidal rotating electrical machine is fastened to the frame 9 by its rear back, and the frame 9 is fixedly connected to the main shaft 7 by means of a conventional mechanical connection such as a pin or a key through the frame base 10. . Figure 1 shows only the structure of the frame 9 and the frame base 10. In the actual product design, the specific structure of the frame 9 and the frame base 10 can be a common frame and frame structure.

The connection between the frame 9 and the spindle 7 can be either an integrated unitary structure or a detachable fixed connection structure.

The machine chuck 4 basically adopts the existing chuck structure, and only the screw connection structure of the existing chuck and the spindle is replaced by the bearing 1 1 , and the bearing 11 can adopt a rolling bearing or a sliding bearing. The machine chuck 4 is rotatably connected to the main shaft 7 through the bearing 11 and realizes positioning. The following configuration can be adopted for the positioning: The positioning end of the main shaft 7 corresponding to the mounting position of the bearing 1 1 or the axial positioning ring is provided. The spacer is used to position the bearing 11, and the inner end cover of the bearing 11 having the same direction of rotation as the chuck can be used to be screw-fitted with the spindle 7, and the outer end of the bearing 1 1 is positioned using the outer end cover 12 of the axially positioned bearing 11. Or, the positioning nut is matched with the limit nut which is screwed with the end of the spindle 7. The threaded rotation of the limit nut is the same as the rotation direction of the chuck 4.

The secondary rotor planar torus 2 of the planar toroidal rotating electrical machine is fixedly connected to the rear end surface of the machine chuck 4 and/or the extension portion 5 by means of a conventional pin, key, screw, etc., of course, it may be fixed by other means. It is attached to the rear end face of the machine chuck 4 and/or to the extension 5.

In this embodiment, in order to prevent other dust or debris from entering the electromagnetic field air gap space 3 and ensuring the running effect of the motor, the chuck 4, the bearing 11, the primary stator frame 9, the primary stator plane torus 1 A sealed space with an electromagnetic field air gap space 3 as an opening is formed between the stage rotor toroidal body 2 and the machine tool spindle 7, and a shallow groove 8 is arranged on the main shaft 7, and a high pressure air pipe or a compressed air pipe is not shown (not shown in the drawing) Introduced into the above-mentioned sealed space from the shallow groove 8, so that when compressed air flows out from the opening of the closed space, that is, the electromagnetic field air gap 3, dust or impurities can be prevented from entering the electromagnetic field air gap space 3 or Dust or impurities entering the electromagnetic field air gap 3 are blown or blocked outside the electromagnetic field air gap space 3. When the secondary rotor planar torus 2 is provided on the chuck extension 5, the components of the above-mentioned closed space include the chuck extension 5, when the secondary rotor planar torus 2 is not provided on the chuck extension 5 The above confined space does not include the chuck extension portion 5.

In order to ensure a better protection effect, in the above-mentioned sealed space, a ring of high-pressure air or compressed air duct blowing nozzle is arranged along the edge of the outer surface of the main shaft 7 facing the plane annular body electromagnetic field air gap space 3 (in the figure) Not shown), in this way, the airflow blown by the blower nozzle can uniformly and reliably blow dust or impurities out of the electromagnetic field air gap space 3. The blowing nozzle may be disposed other than the outer surface of the main shaft 7, and may be disposed in other structures and positions of the above-mentioned sealed space.

In other embodiments, the high pressure air or compressed air tube may be constructed to enter the enclosed space through the primary stator frame 9 or the machine tool spindle 7 or the electromagnetic field air gap space 3.

The energized wires of the primary stator torus 1 can also be mounted in the shallow slots 8. The shallow groove 8 can also be provided with a protective cover.

In other embodiments, compressed air may not be used to prevent dust or debris from entering the electromagnetic field air gap space 3, and a sealing device is provided outside the electromagnetic field air gap space 3 for the purpose.

In other embodiments, the chuck 4, the chuck extension 5, the primary stator frame 9, the primary stator torus 1, the secondary rotor torus 2, and the machine tool spindle 7 are preferred for applications where the environment is preferred. The purpose of the present invention can be achieved without using a closed space structure or by providing the chuck extension portion 5.

The machine tool chuck of the invention uses the existing frequency conversion technology and pressure regulation technology to realize the control of the start, stop, high speed, low speed, forward rotation and reverse rotation of the chuck 4, so that the machine chuck 4 can obtain the work required for the machine tool. Rotational moment and speed.

The flat ring rotary motor can be designed in a variety of sizes to match the machine chucks of various sizes. When it is necessary to use a small power motor, it is possible to reduce the area of the annular space electromagnetic field air gap space 3, that is, to reduce the outer diameter diameter size and increase the inner circle diameter size of the planar ring rotating motor, that is, reduce or reduce the motor iron The method of the core volume, that is, the method of reducing the number and thickness of the silicon steel sheets of the primary stator planar torus 1 and the secondary rotor planar torus 2 of the main shaft 7 of the main shaft 7; The diameter and wire diameter of the primary stator coil winding 13 of the motor are reduced. Conversely, when a high-power motor is required for the design, the area of the electromagnetic field air gap space 3 of the plane ring body can be increased, that is, the outer ring diameter size and the inner diameter diameter of the planar ring rotating motor are increased, that is, the diameter is increased. The method of the volume of the motor core is centered on the axis of the spindle 7, and at the same time increases the number and thickness of the silicon steel sheets of the primary stator planar torus 1 and the secondary rotor planar torus 2, and correspondingly At the same time, the diameter and wire diameter of the primary stator coil winding 13 of the motor are enlarged until the requirements for use are met.

This embodiment is explained by taking the use of the machine chuck structure of the present invention on a horizontal machine tool as an example. In other embodiments, the machine chuck structure of the present invention can be utilized in a machine tool configuration of a vertical machine tool or other special design arrangement.

When the machine chuck structure of the invention is applied to a vertical machine tool, the vertical spindle 7 which is not rotated in the center of the vertical base, the spindle frame 6, the vertical base, the vertical working table and the circle between them can be fully utilized. The circular sliding guide rail and other components directly mount and fix the plane ring toroidal motor first stator plane torus 1 on the main shaft 7, discard the headstock box beside the vertical base and the vertical workbench, and the large teeth below the vertical workbench The structure of the ring and the like, according to the case where the diameter of the extension portion 5 of the outer side of the vertical workbench is much larger than the diameter of the circular toroidal body 2 of the motor secondary rotor, the motor secondary rotor plane torus 2 can be fixedly mounted on The inside of the torus or the extension 5 which strengthens the strength of the table in the middle position of the vertical workbench can also be used between the motor secondary rotor torus 2 and the extension 5 of the outer casing of the vertical workbench and Between the inside of the vertical workbench, that is, between the rear of the vertical machine tool chuck 4 and the inner ring plane 14 perpendicular to the main shaft 7, the connection of the secondary rotor plane torus 2 of the motor is installed. Attaching the support frame, the motor secondary rotor plane torus 2 is fixedly connected with the extension portion 5 of the outer frame of the vertical workbench and the inner ring plane 14 perpendicular to the main shaft 7 in the vertical workbench. A solid whole, so that the electric motor-driven motor secondary rotor plane torus 2 drives the vertical workbench, that is, the vertical machine tool chuck and the workpiece on it rotate.

Claims

Claim

1. An integrated machine tool chuck comprising a frame (6), a machine tool spindle (7) fixedly coupled to the frame, a bearing (11), and an axial positioning and vertical rotation support of the machine tool spindle through the bearing The upper chuck (4) is characterized by: further comprising a planar ring rotating electric machine primary stator frame (9) located on a rear end side of the chuck and fixedly connected to the machine tool spindle, and disposed at the primary a primary stator planar torus (1) on the side of the stator frame and a supply conductor connecting the primary stator planar toroidal coil winding (13), the chuck including a planar toroidal rotary motor disposed thereon A stage rotor planar torus (2), the primary stator planar torus being spaced relative to the secondary rotor planar torus and forming an electromagnetic field air gap (3).

2. The integrated machine tool chuck of claim 1 wherein: said chuck includes an extension (5) of an outer circular shell edge extending toward a rear end thereof, said primary stator planar torus body setting On either or both side surfaces of the primary stator frame, the secondary rotor planar torus corresponding to the primary stator planar torus is disposed on the rear end surface of the chuck or the extension Partially.

3. The integrated machine tool chuck of claim 1 wherein said machine tool spindle (7) is a cylindrical hollow structure.

4. The integrated machine tool chuck of claim 2 wherein: said chuck, bearing, chuck extension, primary stator frame, primary stator planar torus, secondary rotor planar torus A confined space is formed between the machine tool spindle and the electromagnetic field air gap, and includes a compressed air tube that enters the confined space through the primary stator frame or the machine tool spindle or the air gap.

5. The integrated machine tool chuck of claim 4, comprising: a shallow groove disposed axially on a surface of said machine tool spindle, said compressed air tube entering said closed space through said shallow groove.

The integrated machine tool chuck according to claim 4, comprising: a plurality of openings disposed inside said sealed space, said opening being spaced toward said electromagnetic field air gap and spaced along said circumference of said primary stator plane annular body a blowing nozzle, the blowing nozzle being in communication with the compressed air tube.

The integrated machine tool chuck according to any one of claims 1 to 6, wherein the axial positioning of the chuck on the main shaft is achieved by: corresponding to the bearing on the main shaft The installation position is provided with a positioning step, one end of the bearing is matched with the positioning step, and the other end of the bearing is The axially positioned bearing outer end cap is positioned or mated with a limit nut threadedly engaged with the spindle end, and the threaded screw of the limit nut thread is rotated in the same direction as the chuck.

The integrated machine tool chuck according to any one of claims 1 to 6, wherein the axial positioning of the chuck on the main shaft is achieved by: corresponding to the bearing on the main shaft The mounting position is provided with an axially positioned positioning ring, one end of the bearing is co-located with the positioning ring, and the other end of the bearing is positioned by an axially positioned bearing outer end cap or a limit with the threaded end of the spindle. The nut is cooperatively positioned, and the screw thread of the limit nut is screwed in the same direction as the rotation direction of the chuck.

The integrated machine tool chuck according to any one of claims 1 to 6, wherein the axial positioning of the chuck on the main shaft is achieved by: corresponding to the bearing on the main shaft a mounting end is provided with a bearing inner end cap threadedly coupled to the main shaft, the screw end of the threaded end of the bearing is screwed in the same direction as the chuck; the end of the bearing is positioned by the inner end cover of the bearing The other end of the bearing is positioned by an axially positioned outer bearing end cap or is engaged with a limit nut threadedly engaged with the end of the spindle, the threaded rotation of the limit nut threaded with the rotation of the chuck The same direction.

The integrated machine chuck according to any one of claims 1 to 6, wherein the fixed connection structure between the primary stator frame and the main shaft is: the primary stator frame and the main shaft are An integral molding or the primary stator frame is detachably and fixedly coupled to the spindle.