CN213034203U

CN213034203U - Double-shaft indexing headstock of numerical control machine tool

Info

Publication number: CN213034203U
Application number: CN202021349922.0U
Authority: CN
Inventors: 卢玉成
Original assignee: Wuhan Machine Tool Co ltd
Current assignee: Wuhan Machine Tool Co ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-04-23
Anticipated expiration: 2030-07-10

Abstract

The utility model discloses a double-shaft indexing headstock of a numerical control machine tool, which comprises a worm gear box and a headstock; the outer end part of a worm wheel output shaft of the worm wheel and worm box is connected with a rotary table, and the rotary table is connected with the spindle box; the spindle box comprises a spindle box body and a box body connecting plate, one surface of the box body connecting plate is connected with the rotary table, and the other surface of the box body connecting plate is provided with a first servo motor; the output end of the first servo motor is connected with a belt pulley assembly, the driven end of the belt pulley assembly is connected with a main shaft, the main shaft is sleeved in the main shaft box body, and the main shaft and the worm gear output shaft are arranged in a space vertical mode; the main shaft of the double-shaft indexing headstock can rotate along with the whole main shaft box, so that multi-angle and multi-range rotation is formed, the processing range and angle are larger, and the convenience of processing workpieces is improved; and through the setting of scale, can accurate graduation, master rotatory angle, be favorable to improving the precision of processing.

Description

Double-shaft indexing headstock of numerical control machine tool

Technical Field

The utility model relates to digit control machine tool equipment technical field, concretely relates to biax graduation locomotive of digit control machine tool.

Background

An index head is a machine tool accessory used to hold and rotate and index a workpiece. Indexing heads are used primarily in milling machines, and are also commonly used in drilling machines and surface grinding machines. The traditional dividing head is only provided with a horizontal dividing mechanism for horizontally processing a workpiece, and mainly comprises a base, a spindle box, a scale disc, a dividing handle and a spindle; the scale disc is in transmission connection with the spindle through the worm gear mechanism, the spindle can only rotate around the axis of the spindle in the horizontal plane, usually, the scale disc needs to rotate 30-40 circles when the spindle rotates one circle, and the efficiency is extremely low.

In addition, in various devices such as a numerical control boring machine, a milling machine, a machining center, a ring die deep hole machine tool and the like and a mechanism needing to rotate, a commonly used numerical control turntable is designed according to the worm and gear principle, after the worm and gear is used for a period of time, side clearance is increased due to abrasion, positioning accuracy and repeated positioning accuracy are obviously reduced, and although a double-lead worm capable of adjusting worm displacement to compensate abrasion exists in the market, the adjusting method is complex, difficult to control and high in manufacturing cost. For example, a double-shaft index head disclosed in the chinese utility model (publication No. CN202240709U) in 2012 has a high requirement for connecting two main shafts, a high difficulty in assembling, and a manual operation.

In addition, under the influence of the working environment, the transmission mechanism and the indexing gear or the shaft are very easy to be polluted by dirt, debris, cutting fluid and the like, the precision of the whole mechanism cannot be guaranteed after the pollution, especially, the cutting fluid corrodes for a period of time after entering the mechanism, and even the whole mechanism is possibly rusted, so that the whole mechanism is paralyzed.

Disclosure of Invention

The utility model aims at providing a problem to prior art exists, provide a biax graduation locomotive of digit control machine tool.

In order to achieve the above object, the utility model adopts the following technical scheme:

a double-shaft indexing headstock of a numerical control machine tool comprises a worm gear box and a headstock; the outer end part of a worm wheel output shaft of the worm wheel and worm box is connected with a rotary table, and the rotary table is connected with the spindle box; the spindle box comprises a spindle box body and a box body connecting plate, one surface of the box body connecting plate is connected with the rotary table, and the other surface of the box body connecting plate is provided with a first servo motor; the output end of the first servo motor is connected with a belt pulley assembly, the driven end of the belt pulley assembly is connected with a main shaft, and the main shaft is sleeved in the main shaft box body; the main shaft is perpendicular to the space of the worm gear output shaft, and the main shaft is connected with and fixes a workpiece to be processed. The rotary table is an index plate.

The double-shaft indexing headstock enables the main shaft to rotate along with the whole main shaft box besides rotating through the matching of the worm gear box, the rotary table and the main shaft box, so that multi-angle and multi-range rotation is formed, the processing range and angle are larger, and the convenience of workpiece processing is improved; and through the setting of scale, can accurate graduation, master rotatory angle, be favorable to improving the precision of processing.

The worm gear box is used as a first-stage driving part, the worm gear output shaft and the rotary table complete the indexing in the worm gear rotating direction, the spindle box and the spindle complete the indexing in the spindle rotating direction, and the spindle and the worm gear output shaft are vertical in space, so that the worm gear box can at least complete the rotation and the indexing in the vertical direction and the horizontal direction, and can be used for standing and lying.

The first servo motor can realize rotation of the main shaft through the belt pulley assembly, the main shaft box adopting the structure is reasonable and compact in structure, can be connected with the rotary table, can also be used for installing the first servo motor and the main shaft to form multi-stage transmission, and moving parts do not interfere with each other. The belt pulley assembly can also play a certain speed changing and regulating function.

Furthermore, the spindle box body and the box body connecting plate are of an integral structure, and the spindle box body is in a stepped cylindrical shape; the box body connecting plate is connected with an installation plate in a threaded manner, the installation plate is connected with a first motor base in a threaded manner, and the first servo motor is installed on the first motor base; the first servo motor is located below the spindle box.

The spindle box and the box connecting plate adopting the structure are convenient for mounting the spindle and the first servo motor.

Further, the belt pulley assembly comprises a driving belt pulley, a driven belt pulley and a synchronous belt for connecting the driving belt pulley and the driven belt pulley; the driving belt wheel is sleeved with an output shaft of the first servo motor, the end part of the driven belt wheel is in threaded connection with a shaft sleeve, and the shaft sleeve is sleeved on the main shaft; and a tensioning sleeve is also arranged between the shaft sleeve and the main shaft.

The first servo motor rotates to drive the driving belt wheel to rotate, and the driving belt wheel synchronously drives the driven belt wheel to rotate through the synchronous belt, so that the main shaft is driven to rotate.

Furthermore, a bearing seat is arranged between the driven belt wheel and the main shaft, the inner circumferential surface of the driven belt wheel is connected with the bearing seat through a plurality of first bearings, the bearing seat is sleeved on the main shaft and provided with a gap with the outer circumference of the main shaft, one end of the bearing seat is in threaded connection with the end part of the main shaft box body, and the other end of the bearing seat is in threaded connection with a gland.

The bearing seat and the first bearing are arranged to rotatably support the driven belt wheel, so that the running stability and the transmission effect of the driven belt wheel are improved; meanwhile, a detachable structure is formed with the main shaft, so that the installation and maintenance are easy.

Furthermore, the diameter of the driven belt wheel is larger than that of the driving belt wheel, so that the speed change effect is achieved; the driving belt wheel, the driven belt wheel and the synchronous belt are also provided with protective shells outside the synchronous belt, so that the belt wheels and the synchronous belt at all levels are protected from being damaged by foreign objects (a large amount of scraps can fall off during workpiece processing).

Furthermore, the main shaft is a stepped shaft, a plurality of pairs of second bearings are arranged between the main shaft box body and the main shaft, a first end cover and a second end cover are respectively screwed at two ends of the main shaft box body, and the second bearings are respectively arranged at the shaft shoulder of the main shaft and are compressed through the first end cover and the second end cover.

Further, the diameter of the main shaft is gradually increased from the first end cover to the second end cover; the first end cover and the second end cover are respectively sleeved on the main shaft and are in sealing connection.

The spindle with the stepped shaft is convenient for mounting and positioning the second bearing, and can form a sealed spindle box space by matching with the end cover and reduce the axial displacement of the spindle.

Further, the worm gear box is provided with an installation box body, a worm gear and a worm which are meshed with each other are arranged in the installation box body, a second motor base is screwed above the installation box body, a second servo motor is installed on the second motor base, and an output shaft of the second servo motor is connected with the worm through a coupler; the worm wheel is sleeved and screwed on the worm wheel output shaft, and one end of the worm wheel output shaft is exposed out of the installation box body and connected with the rotary table. The exposed part is provided with an outer shell and an end cover, and the worm gear output shaft is protected.

The second servo motor drives the worm to rotate, and the worm drives the worm wheel to rotate, so that the worm wheel output shaft and the rotary table are driven to rotate, and rotation and indexing in the vertical direction are achieved. And a locking piece is arranged between the worm wheel output shaft and the mounting box body so as to fix the angle between the worm wheel output shaft and the rotary table.

Furthermore, the worm wheel output shaft is a hollow shaft, a connecting shaft is arranged at one end, facing the worm wheel output shaft, of the rotary table, and the connecting shaft is sleeved in the worm wheel output shaft.

Further, the main shaft has the notch cuttype inner chamber that the axial runs through, the notch cuttype inner chamber is close to the one end of treating the processing work piece is the horn mouth, the one end block of treating the processing work piece is in the horn mouth and through the connecting piece fastening.

Different clamping tools and connecting pieces, such as chucks, clamps, etc., can be used depending on the structure and type of the workpiece to be machined.

Compared with the prior art, the beneficial effects of the utility model are that: 1. the double-shaft indexing headstock enables the main shaft to rotate along with the whole main shaft box besides rotating through the matching of the worm gear box, the rotary table and the main shaft box, so that multi-angle and multi-range rotation is formed, the processing range and angle are larger, and the convenience of workpiece processing is improved; moreover, through the arrangement of the scales, the scale can be accurately divided, the rotating angle can be mastered, and the processing precision can be improved; 2. the main shaft and the worm wheel output shaft are in spatial vertical, so that the vertical and horizontal rotation and indexing can be completed at least, and the vertical and horizontal universal device can be used vertically and horizontally; 3. the spindle box adopting the structure has reasonable and compact structure, is easy to install and disassemble, can be connected with the rotary table, can also be used for installing the first servo motor and the spindle to form multi-stage transmission, and does not generate interference on each moving part; 4. the arrangement of the worm gear and the belt pulley assembly can also play a certain speed changing and regulating function.

Drawings

Fig. 1 is a schematic view of the overall structure of a double-shaft indexing headstock of a numerical control machine tool of the present invention;

fig. 2 is a schematic view of a cross section of a-a of a double-shaft indexing headstock of a numerical control machine tool according to the present invention;

fig. 3 is a schematic structural view of a spindle box of a double-shaft indexing headstock of the numerical control machine tool of the present invention;

fig. 4 is an enlarged schematic view of the matching structure of the main shaft and the main shaft box of the double-shaft indexing head of the numerical control machine tool of the present invention;

in the figure: 1. a worm gear output shaft; 2. a turntable; 3. a main shaft box body; 4. a box body connecting plate; 5. mounting a plate; 6. a first motor mount; 7. a first servo motor; 8. a driving pulley; 9. a synchronous belt; 10. a driven pulley; 11. a main shaft; 1101. a bell mouth; 12. a shaft sleeve; 13. a tensioning sleeve; 14. a bearing seat; 15. a first bearing; 16. a protective shell; 17. a first end cap; 18. a second end cap; 19. a second bearing; 20. a workpiece to be processed; 21. a connecting member; 22. installing a box body; 23. a worm; 24. a worm gear; 25. a second motor mount; 26. a second servo motor; 27. a coupling; 28. a gland; 29. a seal member; 30. and positioning the retainer ring.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1 to 4, a double-shaft indexing headstock of a numerical control machine tool comprises a worm gear box and a headstock; the outer end part of a worm wheel output shaft 1 of the worm wheel and worm box is connected with a rotary table 2, and the rotary table 2 is connected with the spindle box; the spindle box comprises a spindle box body 3 and a box body connecting plate 4, one surface of the box body connecting plate 4 is connected with the rotary table 2, the other surface of the box body connecting plate is provided with a first servo motor 7, and the spindle box body 3 and the first servo motor 7 are positioned on the same side; the output end of the first servo motor 7 is connected with a belt pulley assembly, the driven end of the belt pulley assembly is connected with a main shaft 11, and the main shaft 11 is sleeved in the main shaft box body 3; the main shaft 11 and the worm gear output shaft 1 are arranged vertically in space, and the main shaft 11 is connected with and fixes a workpiece 20 to be processed. The rotary table 2 is an index plate, and scales are arranged on the outer circumference of the rotary table 2.

The double-shaft indexing headstock enables the main shaft 11 to rotate independently and to rotate along with the whole main shaft box through the matching of the worm and gear box, the rotary table 2 and the main shaft box, so that multi-angle and multi-range rotation is formed, the processing range and angle are larger, and the convenience of workpiece processing is improved; and through the setting of scale, can accurate graduation, master rotatory angle, be favorable to improving the precision of processing.

The worm gear box is used as a first-stage driving part, the worm gear output shaft 1 and the rotary table 2 complete the indexing of the worm gear in the rotating direction, the spindle box and the spindle 11 complete the indexing of the spindle in the rotating direction, and the spindle 11 and the worm gear output shaft 1 are vertical in space, so that the worm gear box can at least complete the rotation and the indexing in the vertical direction and the horizontal direction, and can be used for standing and lying.

The first servo motor 7 can realize rotation of the main shaft 11 through the belt pulley assembly, and the main shaft box adopting the structure is reasonable and compact in structure, can be connected with the rotary table 2, can also be provided with the first servo motor 7 and the main shaft 11 to form multi-stage transmission, and all moving parts do not interfere with each other. The belt pulley assembly can also play a certain speed changing and regulating function.

Further, the spindle box body 3 and the box body connecting plate 4 are of an integral structure, and the spindle box body 3 is of a stepped cylinder shape; the box body connecting plate 4 is in threaded connection with an installation plate 5, the installation plate 5 is in threaded connection with a first motor base 6, and the first servo motor 7 is installed on the first motor base 6; the first servo motor 7 is positioned below the spindle case 3.

The main spindle box 3 and the box connecting plate 4 which adopt the structure are convenient for installing the main spindle 11 and the first servo motor 7.

Further, the belt pulley assembly comprises a driving belt pulley 8, a driven belt pulley 10 and a synchronous belt 9 for connecting the driving belt pulley 8 and the driven belt pulley 10; the driving belt pulley 8 is sleeved with an output shaft of the first servo motor 7, the end part of the driven belt pulley 10 is in threaded connection with a shaft sleeve 12, and the shaft sleeve 12 is sleeved on the main shaft 11; and a tensioning sleeve 13 is also arranged between the shaft sleeve 12 and the main shaft 11.

The first servo motor 7 rotates to drive the driving pulley 8 to rotate, and the driving pulley 8 synchronously drives the driven pulley 10 to rotate through the synchronous belt 9, so as to drive the main shaft 11 to rotate.

Further, a bearing seat 14 is further disposed between the driven pulley 10 and the main shaft 11, an inner circumferential surface of the driven pulley 10 is connected to the bearing seat 14 through a plurality of first bearings 15, the bearing seat 14 is sleeved on the main shaft 11 and has a gap with an outer circumference of the main shaft 11, one end of the bearing seat 14 is screwed to an end of the main shaft box 3, and the other end of the bearing seat is screwed to a gland 28 (see fig. 4).

The bearing seat 14 and the first bearing 15 are arranged to rotatably support the driven pulley 10, so that the running stability and the transmission effect of the driven pulley 10 are improved; meanwhile, a detachable structure is formed with the main shaft 11, so that the installation and maintenance are easy.

Further, the diameter of the driven pulley 10 is larger than that of the driving pulley 8, so that the function of speed change is achieved; the driving belt wheel 8, the driven belt wheel 10 and the synchronous belt 9 are also provided with a protective shell 16, so that the belt wheels and the synchronous belt at all levels are protected from being damaged by foreign objects (a large amount of scraps are dropped during workpiece processing).

Further, the main shaft 11 is a stepped shaft, a plurality of pairs of second bearings 19 are arranged between the main shaft box 3 and the main shaft 11, a first end cap 17 and a second end cap 18 are respectively screwed at two ends of the main shaft box 3, and the second bearings 19 are respectively arranged at a shaft shoulder of the main shaft 11 and are compressed by the first end cap 17 and the second end cap 18.

Further, the diameter of the main shaft 11 is gradually increased from left to right; the first end cap 17 and the second end cap 18 are respectively sleeved on the main shaft 11 and are connected in a sealing manner.

Specifically, a sealing member 29 is respectively arranged between the first end cover 17 and the second end cover 18 and the outer circumference of the main shaft 11; the main shaft 11 is also provided with a positioning retainer ring 30 near the first end cover 17, so that the quick positioning, clamping and installation are facilitated.

The spindle 11 adopting the stepped shaft is convenient for mounting and positioning the second bearing 19, and can form a sealed spindle box space by matching with an end cover and reduce the axial displacement of the spindle 11.

Further, as shown in fig. 1, the worm gear box has a mounting box body 22, a worm wheel 24 and a worm 23 which are meshed with each other are arranged in the mounting box body 22, the worm 23 is vertically arranged, and the worm wheel 24 is arranged on one side of the worm 23; a second motor base 25 is screwed above the mounting box body 22, a second servo motor 26 is mounted on the second motor base 25, and an output shaft of the second servo motor 26 is connected with the worm 23 through a coupler 27; the worm wheel 24 is sleeved and screwed on the worm wheel output shaft 1, and one end of the worm wheel output shaft 1 is exposed out of the installation box 22 and connected with the rotary table 2. The exposed part is provided with an outer shell and an end cover for protecting the worm wheel output shaft 1.

The second servo motor 26 drives the worm 23 to rotate, and the worm 23 drives the worm wheel 24 to rotate, so as to drive the worm wheel output shaft 1 and the rotary table 2 to rotate, thereby realizing rotation and indexing in the vertical direction. A locking piece is arranged between the worm wheel output shaft 1 and the mounting box body 22 so as to fix the angle between the worm wheel output shaft 1 and the rotary table 2.

Furthermore, the worm wheel output shaft 1 is a hollow shaft, a connecting shaft is arranged at one end, facing the worm wheel output shaft 1, of the rotary table 2, and the connecting shaft is sleeved in the worm wheel output shaft 1.

Further, main shaft 11 has the notch cuttype inner chamber that the axial runs through, the notch cuttype inner chamber is close to the one end of waiting to process work piece 20 is horn mouth 1101, the one end block of waiting to process work piece 20 is in fasten in the horn mouth 1101 and through connecting piece 21.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A double-shaft indexing headstock of a numerical control machine tool comprises a worm gear box and a headstock; the outer end part of a worm wheel output shaft of the worm wheel and worm box is connected with a rotary table, and the rotary table is connected with the spindle box; the spindle box comprises a spindle box body and a box body connecting plate, one surface of the box body connecting plate is connected with the rotary table, and the other surface of the box body connecting plate is provided with a first servo motor; the output end of the first servo motor is connected with a belt pulley assembly, the driven end of the belt pulley assembly is connected with a main shaft, and the main shaft is sleeved in the main shaft box body; the main shaft is perpendicular to the space of the worm gear output shaft, and the main shaft is connected with and fixes a workpiece to be processed.

2. The double-shaft indexing headstock of a numerical control machine tool according to claim 1, wherein the headstock body and the box connecting plate are of an integral structure, and the headstock body is of a stepped cylindrical shape; the box body connecting plate is connected with an installation plate in a threaded manner, the installation plate is connected with a first motor base in a threaded manner, and the first servo motor is installed on the first motor base; the first servo motor is located below the spindle box.

3. The biaxial indexing headstock of a numerical control machine tool according to claim 1, wherein the pulley assembly comprises a driving pulley and a driven pulley, and a synchronous belt connecting the driving pulley and the driven pulley; the driving belt wheel is sleeved with an output shaft of the first servo motor, the end part of the driven belt wheel is in threaded connection with a shaft sleeve, and the shaft sleeve is sleeved on the main shaft; and a tensioning sleeve is also arranged between the shaft sleeve and the main shaft.

4. The biaxial indexing headstock of a numerical control machine tool according to claim 3, characterized in that a bearing seat is further provided between the driven pulley and the main shaft, an inner circumferential surface of the driven pulley is connected with the bearing seat through a plurality of first bearings, the bearing seat is sleeved on the main shaft and provided with a gap with an outer circumference of the main shaft, one end of the bearing seat is screwed on an end of the main shaft box body, and the other end of the bearing seat is screwed with a gland.

5. The biaxial indexing headstock of numerical control machine tool according to claim 3, characterized in that the diameter of the driven pulley is larger than the diameter of the driving pulley, and a protective shell is further arranged outside the driving pulley, the driven pulley and the synchronous belt.

6. The double-shaft indexing headstock of a numerical control machine tool according to claim 1, wherein the main shaft is a stepped shaft, a plurality of pairs of second bearings are arranged between the main shaft box body and the main shaft, a first end cover and a second end cover are respectively screwed at two ends of the main shaft box body, and the second bearings are respectively arranged at a shaft shoulder of the main shaft and are compressed through the first end cover and the second end cover.

7. The biaxial indexing headstock of a numerical control machine tool according to claim 6, wherein the main shaft is arranged in a diameter step-increasing manner from the first end cover to the second end cover; the first end cover and the second end cover are respectively sleeved on the main shaft and are in sealing connection.

8. The double-shaft indexing headstock of a numerical control machine tool according to claim 1, wherein the worm gear box is provided with a mounting box body, a worm gear and a worm which are meshed with each other are arranged in the mounting box body, a second motor base is screwed above the mounting box body, a second servo motor is arranged on the second motor base, and an output shaft of the second servo motor is connected with the worm through a coupling; the worm wheel is sleeved and screwed on the worm wheel output shaft, and one end of the worm wheel output shaft is exposed out of the installation box body and connected with the rotary table.

9. The double-shaft indexing headstock of the numerical control machine tool according to any one of claims 1 or 8, wherein the worm gear output shaft is a hollow shaft, one end of the rotary table facing the worm gear output shaft is provided with a connecting shaft, and the connecting shaft is sleeved in the worm gear output shaft.

10. The double-shaft indexing headstock of a numerical control machine tool according to claim 1, wherein the main shaft is provided with a stepped inner cavity which axially penetrates through, one end of the stepped inner cavity, which is close to the workpiece to be machined, is a bell mouth, and one end of the workpiece to be machined is clamped in the bell mouth and fastened through a connecting piece.