CN215879961U - Lifting turntable mechanism and machine tool - Google Patents

Abstract

The application provides a lift revolving stage mechanism and lathe, wherein lift revolving stage mechanism includes: the bottom of the base body is fixed on the machine table, and the top surface of the base body is provided with an annular lower fluted disc surface; the top surface of the rotary body is circumferentially provided with a plurality of processing stations, the bottom surface of the rotary body is provided with an annular upper fluted disc surface, and the upper fluted disc surface is meshed with the lower fluted disc surface; the rotating shaft penetrates through the center of the base body, and the top end of the rotating shaft is fixedly connected with the middle part of the bottom surface of the rotating body; the lifting driving mechanism is positioned in the base body and used for driving the rotary shaft to lift and drive the rotary body to lift; the rotary driving mechanism is positioned at the bottom of the base body and used for driving the rotary shaft to rotate to drive the rotary body to rotate after the rotary body rises; the lifting driving mechanism drives the rotating shaft to descend, and after the rotating shaft descends in place, the rotating shaft is arranged on the upper fluted disc surface and meshed with the lower fluted disc surface to realize indexing positioning, so that the running stability and the working precision of the machine tool are improved.

Description

Lifting turntable mechanism and machine tool

Technical Field

The application relates to the technical field of grinding machine machining, in particular to a lifting rotary table mechanism and a machine tool.

Background

The traditional drill bit machining adopts a five-axis standard tool grinding machine, the productivity is low, the automation is relatively troublesome to realize, the requirements of batch production and high-quality stability at the present stage cannot be met, and along with the realization of the integration of the structure of a multi-station rotary machine tool and the process of the grinding machine, the rotary table is used as a core component of the equipment and plays a very important role for the multi-station machine tool.

The drill bit fixture is installed on the rotary body of the rotary table, the rotary body is lifted after clamping the drill bit, the rotary body rotates to reach the processing station, the rotary body descends, the processing assembly of the processing station processes the drill bit, and the drill bit is high in processing precision requirement, so that the positioning precision requirement on the rotary body is high, but the standard rotary table in the existing market cannot meet the requirement.

Disclosure of Invention

In view of the above-mentioned drawbacks and deficiencies of the prior art, the present application is directed to a lifting turntable mechanism and a machine tool.

In a first aspect, the present application provides a lifting turntable mechanism comprising:

the bottom of the base body is fixed on the machine table, and the top surface of the base body is provided with an annular lower fluted disc surface;

the top surface of the rotary body is circumferentially provided with a plurality of processing stations, the bottom surface of the rotary body is provided with an annular upper fluted disc surface, and the upper fluted disc surface is meshed with the lower fluted disc surface;

the rotating shaft penetrates through the center of the base body, and the top end of the rotating shaft is fixedly connected with the middle part of the bottom surface of the rotating body;

the lifting driving mechanism is positioned in the base body and used for driving the rotary shaft to lift and drive the rotary body to lift;

and the rotation driving mechanism is positioned at the bottom of the base body and used for driving the rotation shaft to rotate to drive the rotation body to rotate after the rotation body rises.

According to the technical scheme provided by some embodiments of the application, a lower fluted disc mounting base is mounted at the top of the base body, and the lower fluted disc surface is arranged on the top surface of the lower fluted disc mounting base; an upper fluted disc mounting seat is mounted at the bottom of the rotary body, and a lower fluted disc surface is arranged on the bottom surface of the upper fluted disc mounting seat.

According to the technical scheme provided by some embodiments of the present application, the rotary driving mechanism includes a driving motor, a main gear fixedly connected to an output shaft of the driving motor, and a driven gear engaged with the main gear; the driven gear is fixed at the bottom end of the rotating shaft; the main gear is meshed with the driven gear through straight teeth, and the length extending direction of the straight teeth is parallel to the axial direction of the rotating shaft.

According to the technical scheme provided by some embodiments of the application, the lifting driving mechanism comprises a cylinder and a hollow piston driven by the cylinder; the rotating shaft penetrates through the hollow cavity of the piston and is connected with the inner wall of the piston through a bearing.

According to the technical scheme provided by some embodiments of the application, an air cavity is formed between the base body and the piston; a circle of piston outer ring extends from the middle part of the outer wall of the piston to divide the air cavity into an upper air cavity and a lower air cavity; and the top wall of the lower air cavity and the bottom wall of the upper air cavity are provided with elastic damping rings.

According to the technical scheme provided by certain embodiments of the application, the piston and the rotating shaft are connected through a composite bearing set.

According to the technical scheme provided by some embodiments of the present application, the upper fluted disc surface and the lower fluted disc surface are engaged and positioned in a rat fluted disc manner.

In a second aspect, the present application provides a machine tool having the above-described lifting turntable mechanism mounted thereon.

In summary, the present application provides a lifting turntable mechanism, which includes a rotation body having an upper toothed disc surface on a bottom surface, a base body having a lower toothed disc surface on a top surface, a rotation shaft fixedly connected to a middle portion of the rotation body and penetrating through a center of the base body, and a lifting driving mechanism and a rotation driving mechanism for driving the rotation shaft to lift and rotate. When the machine tool is in work, the lifting driving mechanism drives the rotating shaft to ascend, the rotating driving mechanism drives the rotating shaft to rotate to a machining station after the rotating shaft ascends to the proper position, the lifting driving mechanism drives the rotating shaft to descend after the rotating shaft is in the proper position, and the lower fluted disc surface and the upper fluted disc surface are meshed to realize indexing positioning of the upper fluted disc and the lower fluted disc after the rotating shaft descends to the proper position, so that the running stability and the working precision of the machine tool are improved.

In the preferred embodiment of the present application, in the driving mode of the rotating shaft, the driving gear is meshed with the spur of the driven gear, and the extending direction of the spur is parallel to the axis of the rotating shaft, so that when the rotating body is lifted, the driven gear can still be meshed with the driving gear; the simple structure realizes the integration of the rotary motion and the linear motion of the rotary body, so that the whole structure of the machine tool is compact.

Drawings

Fig. 1 is a cross-sectional view of a schematic structural diagram of an elevating turntable mechanism according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a lifting turntable mechanism according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

the text labels in the figures are represented as:

1. a base body; 11. a lower fluted disc mounting base; 12. a turntable base; 2. a rotating body; 21. an upper fluted disc mounting seat; 22. a rotating body base; 23. a turntable protective cover; 3. a rotation driving mechanism; 31. a main gear; 32. a driven gear; 4. a rotating shaft; 5. a piston; 51. a piston outer ring; 52. an upper air cavity; 53. a lower air cavity; 54. a piston inner ring; 6. an elastic damping ring; 7. locking a nut; 8. a servo motor; 9. a thrust bearing set; 10. a deep groove ball bearing set; 13. and (4) carrying out turnover.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example 1

As mentioned in the background art, the present embodiment provides a lifting turntable mechanism, as shown in fig. 1, for solving the problem that the standard turntable structure in the prior art cannot meet the requirement of the existing machining precision, including:

the bottom of the base body 1 is fixed on the machine table, and the top surface of the base body is provided with an annular lower fluted disc surface;

the top surface of the rotary body 2 is circumferentially provided with a plurality of processing stations, the bottom surface of the rotary body is provided with an annular upper fluted disc surface, and the upper fluted disc surface is meshed with the lower fluted disc surface;

and the rotating shaft 4 penetrates through the center of the base body 1, and the top end of the rotating shaft is fixedly connected with the middle part of the bottom surface of the rotating body 2. The rotating shaft 4 is a direct actuator for rotation and lifting, and optionally, the rotating shaft 4 is connected with the rotating body 2 through a bolt, so that when the rotating shaft 4 is lifted or rotated, the rotating body 2 acts therewith, and preferably, the rotating shaft 4 is a hollow cylinder, so that the load of a driving mechanism can be reduced, and the operation efficiency can be improved.

The lifting driving mechanism is positioned in the base body 1 and used for driving the rotary shaft 4 to lift and drive the rotary body 2 to lift;

and the rotation driving mechanism is positioned at the bottom of the base body 1 and is used for driving the rotation shaft 4 to rotate to drive the rotation body 2 to rotate after the rotation body 2 rises.

The lifting driving mechanism is arranged outside the rotating shaft 4 in a surrounding mode and is rotatably connected with the rotating shaft 4, when the rotating shaft 4 rotates, the lifting driving mechanism cannot rotate along with the rotating shaft, preferably, the bottom of the base body 1 is fixed on a machine table through foundation bolts, the machine table is provided with a groove, the rotating driving mechanism is arranged in the groove in the bottom of the base body 1, as shown in fig. 2, the rotating driving mechanism is a servo motor 8, the output end of the servo motor 8 is provided with a speed reducer, and the servo motor 8 has the advantages of good high-speed performance and strong adaptability, so that the servo motor 8 is used for enabling the system to still keep stable and high control precision under high-speed operation.

When the machine tool is in operation, the lifting driving mechanism drives the rotating shaft 4 to ascend, after the rotating shaft ascends to the proper position, the rotating driving mechanism drives the rotating shaft 4 to rotate to a machining station, after the rotating shaft is in the proper position, the lifting driving mechanism drives the rotating shaft 4 to descend, and after the rotating shaft descends to the proper position, the lower fluted disc surface and the upper fluted disc surface are meshed to realize indexing positioning of the upper fluted disc and the lower fluted disc, so that the operation stability and the working precision of the machine tool are improved.

Preferably, a lower fluted disc mounting base 11 is mounted at the top of the base body 1, and the lower fluted disc surface is arranged on the top surface of the lower fluted disc mounting base 11; an upper fluted disc mounting seat 21 is mounted at the bottom of the rotary body 2, and the upper fluted disc surface is arranged on the bottom surface of the upper fluted disc mounting seat 21. The base body 1 comprises a rotary table base 12 fixed at the bottom of a machine table and a lower fluted disc mounting base 11 connected with the rotary table base 12 and arranged at the top of the base body 1, and a lower fluted disc surface is arranged on the lower fluted disc mounting base 11; the rotary body 2 comprises an upper fluted disc mounting seat 21 at the bottom and a rotary body base 22 connected with the upper fluted disc mounting seat 21, an upper fluted disc surface is arranged on the upper fluted disc mounting seat 21, optionally, the lower fluted disc mounting seat 11 is connected with the rotary table base 12 through bolts and can be integrally formed, the upper fluted disc mounting seat 21 is connected with the rotary body base 22 through bolts and can be integrally formed, and a non-mounting surface adopts a cambered surface design, so that the flowability of accumulated scraps is improved; set up go up fluted disc mount pad 21 and fluted disc mount pad 11 can conveniently be maintained down, avoids direct integration base body 1 with the unable problem of changing of fluted disc surface damage on the gyration body 2. Preferably, base body 1 and gyration body 1 are hollow cylinder shape, and inside is equipped with installation space, has greatly improved the integration of lathe.

As shown in fig. 1, the rotary driving mechanism 3 includes a driving motor 8, a main gear 31 fixedly connected to an output shaft of the driving motor 8, and a driven gear 32 engaged with the main gear 31; the driven gear 32 is fixed at the bottom end of the rotating shaft 4; the main gear 31 is engaged with the driven gear 32 through a straight tooth, and the length extension direction of the straight tooth is parallel to the axial direction of the rotating shaft 4.

In the prior art, belt transmission cannot ensure accurate transmission ratio, chain transmission cannot realize constant instantaneous transmission ratio, and the transmission ratio of a gear is relatively accurate and constant, which is a key requirement for precision machinery and instruments and is an important condition for lightening dynamic load and realizing stable transmission under high-speed heavy load; the driving gear 31 is meshed with the driven gear 32, and the extending direction of the straight teeth is parallel to the axis of the rotating shaft 4, so that the driven gear 32 can still be meshed with the driving gear 31 when the rotating body 2 is lifted; the simple structure realizes the integration of the rotary motion and the linear motion of the rotary body 2, so that the whole structure of the machine tool is compact. The straight teeth are simple in processing technology, compact in structure and strong in bearing capacity, and the mechanical strength of the lifting turntable mechanism is improved.

Preferably, as shown in fig. 1 and 3, the lifting driving mechanism includes a cylinder and a hollow piston 5 driven by the cylinder; the rotating shaft 4 penetrates through the hollow cavity of the piston 5 and is connected with the inner wall of the piston 5 through a bearing. The upper end of the outer wall of the revolving shaft 4 is annularly provided with a peripheral platform 13 close to the upper part of the bearing, the outer diameter of the peripheral platform 13 is slightly larger than the outer diameter of the inner ring of the bearing, the outer wall of the revolving shaft 4 is annularly provided with a locking nut 7 close to the lower part of the bearing, the locking nut 7 can move up and down along the axial direction parallel to the revolving shaft 4 relative to the revolving shaft 4 to lock the locking nut 7 upwards, the inner ring of the bearing and the revolving shaft 4 are fixed under the extrusion force of the peripheral platform 13 and the locking nut 7, so that the revolving shaft 4 moves up and down along with the up and down movement when the bearing 4 moves up and down, and the up and down movement of the revolving body 2 connected with the revolving shaft 4 is realized. Because the drill bit machine tool is a high-speed machine tool, a cylinder with higher efficiency compared with a hydraulic system is selected, and the working efficiency of the system is greatly improved due to the design of the cylinder.

As shown in fig. 3, an air cavity is formed between the base body 1 and the piston 5; a circle of piston outer ring 51 extends from the middle part of the outer wall of the piston 5 to divide the air cavity into an upper air cavity 52 and a lower air cavity 53; the top wall of the lower air cavity 53 and the bottom wall of the upper air cavity 52 are provided with elastic damping rings 6. The base body 1 is provided with a concave block, an air cavity is formed between the concave block and the piston 5, the piston outer ring 51 can slide in the air cavity along the direction parallel to the axis of the revolving shaft 4, so that the air cavity is divided into an upper air cavity 52 and a lower air cavity 53, and the piston outer ring 51 can slide in the air cavity due to the difference of the pressure of compressed air in the upper air cavity and the lower air cavity. Preferably, go up air cavity 52 and be equipped with the gas port in the air cavity 53 down, the cylinder is located outside the base body 1, the cylinder pass through pneumatic assembly to the air feed in the air cavity, gas is compressed air, preferably, pneumatic assembly is two five-way solenoid valves, utilizes the trachea to connect the gas port, through control five-way solenoid valve's break-make realizes two the air feed in turn of gas port has realized piston 5's reciprocating motion. When air is supplied from the air inlet of the upper air cavity 52, the piston outer ring 51 moves downwards under the pressure of compressed air, and the piston 5 moves downwards along with the piston outer ring, so that the rotary shaft 4 in bearing connection with the piston 5 drives the rotary body 2 to descend; when air is introduced from the air port of the lower air chamber 53, the piston outer ring 51 moves upward under the pressure of the compressed air, and the piston 5 moves upward, so that the rotary shaft 4 bearing-connected to the piston 5 drives the rotary body 2 to ascend.

Because the pneumatic control impact force is too large, the piston 5 and the base body 1 can be damaged due to long-time mechanical collision, the elastic damping ring 6 is arranged at the contact position of the piston outer ring 51 in the air cavity and the base body 1, namely the elastic damping ring 6 is arranged on the bottom wall of the upper air cavity 52 and the top wall of the lower air cavity 53, the piston 5 is prevented from directly contacting the base body 1 under the buffering of the elastic damping ring 6, the condition that the mechanical collision impact force of the lower gear plate surface and the upper gear plate surface is too large is also avoided, and the operation stability of the machine tool and the accuracy of the gear plate precision are improved.

As shown in fig. 3, the piston 5 is connected to the rotary shaft 4 by a composite bearing set. The composite bearing set comprises a thrust bearing set 9 and a deep groove ball bearing set 10, wherein a circle of piston inner ring 54 extends from the middle part of the inner wall of the piston 5 to the direction of the rotating shaft 4, the piston inner ring 54 is tightly attached to the rotating shaft 4, preferably, the thrust bearing set 9 comprises two thrust bearings which are symmetrically distributed about the piston inner ring 54 and are closely adjacent to the piston inner ring 54, and the deep groove ball bearing set 10 comprises two deep groove ball bearings which are symmetrically distributed about the piston inner ring 54 and are closely adjacent to the thrust bearing set 9. The deep groove ball bearing has small friction resistance and high rotating speed, can bear larger radial force, but has small axial load and large axial load of the thrust bearing, so the form of combining the deep groove ball bearing and the thrust bearing is adopted, the high-speed rotation can be ensured under the condition of ensuring certain radial and axial loads, and the high-precision rotary connection is realized.

Preferably, the upper fluted disc surface and the lower fluted disc surface are meshed and positioned in a rat fluted disc mode. The upper fluted disc surface is provided with an upper fluted disc, the lower fluted disc surface is provided with a lower fluted disc, the two fluted discs have the same teeth, and the graduation of the end fluted disc of the mouse fluted disc is positioned by a fixed value.

Preferably, as shown in fig. 2, the upper end of the rotating body 2 is provided with a turntable protection cover 23. When the rotary body 2 descends, the upper fluted disc surface is meshed with the lower fluted disc surface, the drill bit clamping mechanism on the rotary body 2 carries a drill bit to be processed to perform high-speed processing on processing components at different stations, and when the rotary body operates at a high speed, the whole rotary table mechanism is in a closed state, and the rotary body 2 is provided with the rotary table protective cover 23, so that foreign matters can be prevented from falling into the rotary body to protect equipment safety.

Example 2

Embodiment 1 provides a machine tool on which the lifting turntable mechanism according to embodiment 1 is mounted. Specifically, the lifting turntable mechanism is arranged at the central position of the machine tool, and multiple stations are arranged on the outer ring of the lifting turntable mechanism.

The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that there are no specific structures which are objectively limitless due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the technical features mentioned above can be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention in other instances, which may or may not be practiced, are intended to be within the scope of the present application.

Claims (8)

1. A lifting turntable mechanism, comprising:

the bottom of the base body (1) is fixed on the machine table, and the top surface of the base body is provided with an annular lower fluted disc surface;

the top surface of the rotary body (2) is circumferentially provided with a plurality of processing stations, the bottom surface of the rotary body is provided with an annular upper fluted disc surface, and the upper fluted disc surface is meshed with the lower fluted disc surface;

the rotating shaft (4) penetrates through the center of the base body (1), and the top end of the rotating shaft is fixedly connected with the middle part of the bottom surface of the rotating body (2);

the lifting driving mechanism is positioned in the base body (1) and used for driving the rotating shaft (4) to drive the rotating body (2) to lift;

the rotation driving mechanism is positioned at the bottom of the base body (1), and is used for driving the rotation shaft (4) to drive the rotation body (2) to rotate after the rotation body (2) rises.

2. The elevating turntable mechanism as set forth in claim 1, wherein: a lower fluted disc mounting seat (11) is mounted at the top of the base body (1), and the lower fluted disc surface is arranged on the top surface of the lower fluted disc mounting seat (11); an upper fluted disc mounting seat (21) is mounted at the bottom of the rotary body (2), and the upper fluted disc surface is arranged on the bottom surface of the upper fluted disc mounting seat (21).

3. The elevating turntable mechanism as set forth in claim 1, wherein: the rotary driving mechanism (3) comprises a driving motor (8), a main gear (31) fixedly connected with an output shaft of the driving motor (8), and a driven gear (32) meshed with the main gear (31); the driven gear (32) is fixed at the bottom end of the rotating shaft (4); the main gear (31) is meshed with the driven gear (32) through straight teeth, and the length extension direction of the straight teeth is parallel to the axial direction of the rotating shaft (4).

4. The elevating turntable mechanism as set forth in claim 1, wherein: the lifting driving mechanism comprises a cylinder and a hollow piston (5) driven by the cylinder; the rotating shaft (4) penetrates through the hollow cavity of the piston (5) and is connected with the inner wall of the piston (5) through a bearing.

5. The elevating turntable mechanism as set forth in claim 4, wherein: an air cavity is formed between the base body (1) and the piston (5); a circle of piston outer ring (51) extends from the middle part of the outer wall of the piston (5) to divide the air cavity into an upper air cavity (52) and a lower air cavity (53); and elastic damping rings (6) are arranged on the top wall of the lower air cavity (53) and the bottom wall of the upper air cavity (52).

6. The elevating turntable mechanism as set forth in claim 4, wherein: the piston (5) is connected with the rotating shaft (4) through a composite bearing set.

7. The elevating turntable mechanism as set forth in claim 1, wherein: the upper fluted disc surface and the lower fluted disc surface are meshed and positioned in a rat fluted disc mode.

8. A machine tool, characterized by: the machine tool is provided with the lifting turntable mechanism of claims 1-7.

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