CN213730452U

CN213730452U - Rotary worktable

Info

Publication number: CN213730452U
Application number: CN202022961339.1U
Authority: CN
Inventors: 曲应恺; 王升科; 应华
Original assignee: Yantai University
Current assignee: Yantai University
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-07-20
Anticipated expiration: 2030-12-10

Abstract

The utility model relates to a rotary worktable, install including the casing, through the axis of rotation rotating table on the casing, the axis of rotation drives under worm gear actuating mechanism's effect and rotates the platform, it is equipped with cross roller bearing to rotate between platform and the axis of rotation, cross roller bearing includes bearing inner race, bearing outer lane and rolling element, the bearing outer lane with the casing is connected, the upper portion and the rotation platform of bearing inner race are connected, and the lower part is connected with axis of rotation and/or worm wheel. The crossed roller bearing can bear forces in two directions, namely axial force and radial force, has simple structure, few parts, simple and convenient processing and assembly, no need of wear-resistant gaskets, low requirement on the skill of assembly workers, low cost and convenient maintenance, and can realize batch production; the rotary working table can be horizontally installed, can be hoisted and can also be laterally installed, and the application range of the rotary working table is greatly expanded.

Description

Rotary worktable

Technical Field

The utility model relates to a rotary worktable belongs to digit control machine tool part technical field.

Background

The numerical control rotary worktable is an indispensable functional part of a numerical control boring and milling machine, a gantry machining center, a numerical control gear milling machine, a gear grinding machine and the like, is a worktable which is arranged on a rotary multi-station machine tool and is used for completing one-step machining of multiple procedures of parts, and can carry out numerical control indexing on a workpiece under the driving of a related system or carry out continuous rotary cutting machining on the workpiece in linkage with the machine tool.

The requirements of the machine tool and the rotary table on the corner precision, the surface roughness and the like of the existing machined part are high, and the factors of the rotary table such as the motion precision, the bearing capacity, the capacity of coping with impact force and the like relate to the production and processing capacity and the efficiency of the whole machine tool. The existing rotary worktable has complex structure, high cost and difficult maintenance and adjustment, and meanwhile, the worktable is supported by adopting common bearings mostly, and the bearing support and bearing capacity are limited, so that the application conditions of the movement precision and the bearing capacity of the worktable are not ideal.

SUMMERY OF THE UTILITY MODEL

The utility model discloses not enough to prior art exists, provide a simple structure is compact, and is with low costs, and convenient assembling is swift, and bearing capacity is big, the wide rotary worktable of range of application.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a rotary worktable comprises a shell and a rotating table arranged on the shell through a rotating shaft, wherein the rotating shaft drives the rotating table to rotate under the action of a worm and gear driving mechanism, the worm and gear driving mechanism comprises a driving motor, a worm and a worm gear, the worm gear is arranged on the rotating shaft, the worm is rotatably arranged on the shell, one end of the worm is connected with an output shaft of the driving motor, and the other end of the worm is meshed with the worm gear;

the bearing outer ring is connected with the shell, the upper part of the bearing inner ring is connected with the rotating table, and the lower part of the bearing inner ring is connected with the rotating shaft and/or the worm wheel.

The utility model has the advantages that: the crossed roller bearings are arranged among the rotating shaft, the shell and the rotating table, can bear forces in two directions, namely axial force and radial force, on one hand, stable axial support on the rotating table is realized, on the other hand, radial constraint on the rotating shaft is realized, the structure is simple, the number of parts is small, the processing and assembly are simple and convenient, wear-resistant gaskets are not needed, the requirement on the skill of an assembly worker is low, the cost is low, the maintenance is convenient, and the batch production can be realized; the rotary working table can be horizontally installed, can be hoisted and can also be laterally installed, and the application range of the rotary working table is greatly expanded.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Furthermore, an annular boss is arranged on the outer surface of the rotating shaft, and the worm wheel is mounted on the annular boss.

The beneficial effect who adopts above-mentioned further scheme is that, realize the support location of worm wheel through annular boss, guaranteed the stability of being connected of worm wheel and axis of rotation.

Furthermore, the bottom of the worm wheel is provided with an annular groove matched with the annular boss.

The beneficial effect who adopts above-mentioned further scheme is that, the worm wheel is convenient in the epaxial location of rotation, also is convenient for simultaneously be connected between axis of rotation and the worm wheel.

Furthermore, the annular boss is provided with a mounting hole for mounting a locking bolt, and the worm wheel is connected with the rotating shaft through the locking bolt.

Adopt the beneficial effect of above-mentioned further scheme to be, realize the fixed connection of axis of rotation and worm wheel through locking bolt.

Furthermore, the locking bolt is a long bolt, and the rod part of the locking bolt penetrates through the worm wheel to be connected with the bearing inner ring.

The beneficial effect who adopts above-mentioned further scheme is that, accessible long bolt realizes the connection between axis of rotation, worm wheel and the bearing inner race, connects stably, simple to operate, the maintenance of being convenient for.

Furthermore, the bottom of the rotating table is provided with an annular avoiding groove, and the annular avoiding groove is arranged above the bearing outer ring.

The beneficial effect of adopting above-mentioned further scheme is that, under worm gear actuating mechanism's effect, the axis of rotation rotates, and bearing inner race and revolving stage rotate thereupon, in order to avoid the revolving stage to rotate the in-process and fix the friction between the bearing inner race that does not rotate on the casing, so set up the groove of dodging with bearing inner race corresponding position department on the revolving stage, avoided revolving stage and bearing inner race contact wear.

Further, the shell is connected with the bearing outer ring through a fastening bolt.

The bearing outer ring is provided with a bolt mounting hole for mounting a fastening bolt. And the mounting and positioning of the bearing outer ring are realized.

Furthermore, the shell is at least provided with an oil seal embedding groove.

Adopt the beneficial effect of above-mentioned further scheme to be, the revolving stage can adopt liquid lubricating oil or lubricating grease to lubricate. On one hand, the abrasion between the rotating shaft and the shell is reduced, and on the other hand, the overflow of lubricating grease is avoided.

Furthermore, an eccentric sleeve is arranged on the shell, the worm is connected with the eccentric sleeve through a bearing and/or a shaft sleeve, and a motor base of the driving motor is installed on the eccentric sleeve.

The beneficial effect who adopts above-mentioned further scheme is, realizes the installation and the location to the support of worm and motor, the subsequent maintenance of being convenient for.

Further, an output shaft of the driving motor is connected with the worm through a coupling.

The beneficial effect of adopting above-mentioned further scheme is that, realize being connected of worm and motor through the shaft coupling, be convenient for realize the installation to the motor and to the drive of worm power.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic sectional view taken along the line A-A in FIG. 1 (90 degrees clockwise rotation);

in the figure, 1, a housing; 2. a rotating table; 201. an avoidance groove; 3. a rotating shaft; 301. an annular boss; 302. mounting holes; 4. a worm gear; 5. a worm; 6. a crossed roller bearing; 601. a bearing inner race; 602. a bearing outer race; 603. a rolling body; 7. a drive motor; 8. locking the bolt; 9. fastening a bolt; 10. oil sealing; 11. an oil seal embedding groove; 12. an eccentric sleeve; 13. a motor base; 14. a coupling is provided.

Detailed Description

The principles and features of the present invention are described below in conjunction with examples, which are set forth only to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 and 2, a rotary table comprises a housing 1 and a rotary table 2 mounted on the housing through a rotary shaft 3, the rotary shaft drives the rotary table to rotate under the action of a worm and gear driving mechanism, the worm and gear driving mechanism comprises a driving motor 7, a worm 5 and a worm gear 4, the worm gear is mounted on the rotary shaft, the worm is rotatably mounted on the housing, one end of the worm is connected with an output shaft of the driving motor, and the other end of the worm is meshed with the worm gear; the worm is mounted on the housing through a bearing or a bushing.

The cross roller bearing 6 is arranged between the rotating platform and the rotating shaft, the cross roller bearing 6 comprises a bearing inner ring 601, a bearing outer ring 602 and a rolling body 603 arranged between the bearing inner ring and the bearing outer ring, the bearing outer ring is connected with the shell, the upper part of the bearing inner ring is connected with the rotating platform, and the lower part of the bearing inner ring is connected with the rotating shaft and/or the worm wheel.

An annular boss 301 is arranged on the outer surface of the rotating shaft 3, and the worm wheel is installed on the annular boss. The supporting and positioning of the worm wheel are realized through the annular boss, and the connection stability of the worm wheel and the rotating shaft is ensured.

And an annular groove matched with the annular boss is formed in the bottom of the worm wheel. The worm wheel is convenient to locate on the rotating shaft, and meanwhile, the connecting between the rotating shaft and the worm wheel is facilitated.

The annular boss is provided with a mounting hole 302 for mounting a locking bolt, and the worm wheel is connected with the rotating shaft through the locking bolt 8. The fixed connection of the rotating shaft and the worm wheel is realized through the locking bolt. The rotating platform is connected with the bearing inner ring through a bolt.

The locking bolt 8 is a long bolt, and the rod part of the locking bolt penetrates through the worm wheel to be connected with the bearing inner ring. The connection among the rotating shaft, the worm wheel and the bearing inner ring can be realized through the long bolt, and the connection is stable.

The bottom of revolving stage 2 is equipped with annular and dodges groove 201, the annular dodges the groove setting and is in the top of bearing inner race. Under the action of the worm and gear driving mechanism, the rotating shaft rotates, the bearing inner ring and the rotating platform rotate along with the rotating shaft, and in order to avoid friction between the rotating platform and a bearing outer ring which is fixed on the shell and does not rotate in the rotating process, an avoiding groove is arranged at the position, corresponding to the bearing outer ring, on the rotating platform, so that the rotating platform is prevented from being in contact abrasion with the bearing outer ring.

The housing is connected with the bearing outer ring through a fastening bolt 9. And the bearing outer ring is provided with a bolt mounting hole for mounting a fastening bolt. And the mounting and positioning of the bearing outer ring are realized.

The shell is at least provided with an oil seal embedding groove 11. The rotating table can be lubricated by liquid lubricating oil or lubricating grease. The oil seal 10 is installed in the oil seal embedding groove, so that abrasion of a rotating shaft and a shell is reduced, and overflow of lubricating grease is avoided.

The worm is connected with the eccentric sleeve through a bearing and/or a shaft sleeve, and a motor base 13 of the driving motor is installed on the eccentric sleeve. The supporting of the worm and the installation and the positioning of the motor are realized, the subsequent maintenance is convenient, in addition, the eccentric sleeve adjusts and eliminates the meshing clearance of the worm gear and the worm through adjusting the eccentricity, so that the small-clearance precise transmission is realized, and the indexing precision of the worm gear is improved.

The output shaft of the drive motor is connected to the worm via a coupling 14. The connection between the worm and the motor is realized through the coupling, so that the motor is convenient to mount and the worm power is convenient to drive.

The crossed roller bearing can bear forces in two directions, namely axial force and radial force, on one hand, stable axial support of the rotary table is achieved, on the other hand, radial constraint of the rotary shaft is achieved, all stress and positioning can be borne through the crossed roller bearing, bearing is stable and reliable, the rotary table can be horizontally installed, hoisted or laterally installed, and the application range of the rotary table is greatly expanded.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A rotary worktable is characterized by comprising a shell and a rotary table arranged on the shell through a rotating shaft, wherein the rotating shaft drives the rotary table to rotate under the action of a worm and gear driving mechanism, the worm and gear driving mechanism comprises a driving motor, a worm and a worm gear, the worm gear is arranged on the rotating shaft, the worm is rotatably arranged on the shell, one end of the worm is connected with an output shaft of the driving motor, and the other end of the worm is meshed with the worm gear;

2. The rotary table of claim 1, wherein an annular boss is provided on an outer surface of the rotary shaft, and the worm wheel is mounted on the annular boss.

3. The rotary table of claim 2, wherein the bottom of the worm gear is provided with an annular groove adapted to the annular boss.

4. The rotary table according to claim 2 or 3, wherein the annular boss is provided with a mounting hole for mounting a locking bolt, and the worm wheel is connected with the rotary shaft through the locking bolt.

5. The rotary table of claim 4, wherein the locking bolt is a long bolt, and a rod portion of the locking bolt penetrates through the worm wheel to be connected with the bearing inner ring.

6. The rotary table of any one of claims 1 to 3, wherein the bottom of the rotary table is provided with an annular avoidance groove, and the annular avoidance groove is arranged above the bearing outer ring.

7. A rotary table according to any one of claims 1 to 3, wherein the housing is connected to the bearing outer race by fastening bolts.

8. A rotary table according to any one of claims 1 to 3 wherein the housing has at least one oil-tight groove.

9. The rotary table according to claim 1, wherein the housing is provided with an eccentric sleeve, the worm is connected with the eccentric sleeve through a bearing and/or a shaft sleeve, and a motor base of the driving motor is mounted on the eccentric sleeve.

10. The rotary table of claim 1, wherein an output shaft of the drive motor is coupled to the worm via a coupling.