A rotary table mechanism applied to a five-axis machining center

Abstract

The application discloses a rotary table mechanism applied to a five-axis machining center, which comprises a supporting plate, the bottom of the supporting plate is rotationally connected to the telescopic end of an electric telescopic rod, the top of the supporting plate is rotationally connected to the bottom of a control platform, the surface of an operation platform is fixedly connected with a limiting platform, the bottom of the control platform is movably connected with a top-holding assembly, the top of the control platform is movably connected with a mounting table, the outer ring surface of the mounting table is movably connected with a limiting plate, the top-holding assembly is movably connected with the limiting plate, and one end of the limiting plate is movably connected with the inner side of the limiting platform. The top-holding rod is movably connected in a certain group of inclined grooves, so that the movable platform and the mounting table can be driven to rotate around an auxiliary ball, the inclination of the mounting table is realized, multi-angle machining of tools is facilitated, and the practicability of the equipment is higher.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical equipment, and specifically relates to a turntable mechanism applied to a five-axis machining center. Background Art

[0002] With the increasing maturity of domestic numerical control technology, five-axis numerical control machining centers have been widely used in various fields in recent years; in practical applications, whenever people encounter the problem of efficient and high-quality processing of special-shaped complex parts, five-axis linkage technology is undoubtedly an important means to solve such problems; with the vigorous development of my country's aerospace, military industry, auto parts and mold manufacturing industries in recent years, more and more manufacturers tend to find five-axis equipment to meet the requirements of high-efficiency and high-quality processing.

[0003] In the prior art, a two-axis turntable for five-axis machining centers is disclosed in Publication No. CN209256334U. It is pointed out in this patent that the overturning motor drives the overturning platform to rotate through a harmonic reducer to achieve the purpose of adjusting the angle of the machining spindle, and the rotating mechanism adopts the mode of bevel gear meshing and worm gear-worm cooperation, with tight coordination between all components, small clearance, good stability, effectively reducing the possibility of deflection and shaking, and further ensuring the machining accuracy.

[0004] However, the conventional device still has the following problems when in use: Since the platform can only adjust a single plane angle, the tool cannot be flipped at multiple plane angles, resulting in relatively single practicability. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a turntable mechanism applied to a five-axis machining center, which has the advantage of realizing multi-angle processing of tools.

[0006] To achieve the above purpose, the present invention provides the following technical solution: a turntable mechanism applied to a five-axis machining center, comprising a support plate, the bottom of the support plate is rotatably connected to the telescopic end of an electric telescopic rod, the top of the support plate is rotatably connected to the bottom of a control platform, a limit platform is fixed on the surface of the control platform, a jacking component is movably inserted at the bottom of the control platform, a mounting platform is movably lapped on the top of the control platform, a limit plate is movably inserted on the outer annular surface of the mounting platform, the jacking component is in movable contact with the limit plate, and one end of the limit plate is in movable contact with the inner side of the limit platform.

[0007] Preferably, the support plate is in a "匚"-shaped plate structure, an auxiliary annular groove is provided at the bottom of the control platform, the auxiliary annular groove is an annular plate-shaped groove structure, the tops of the two side plates of the support plate are arc-shaped, and the tops of the two side plates of the support plate are rotatably connected in the auxiliary annular groove.

[0008] Preferably, the control platform has a polygonal plate structure, with a meshing plate fixedly installed on the outer side of the control platform. Multiple sets of meshing plates are arranged in a circular array about the center of the control platform, and a meshing tooth plate is engaged on one side of the meshing plate. A motor is fixedly installed at the bottom of the meshing tooth plate.

[0009] Preferably, the control platform has a bottom groove at its bottom, a rotating groove and a top groove at its top. The rotating groove is arc-shaped, and the control platform has a movable groove inside. The movable groove is spherical. The bottom groove is connected to the rotating groove and the movable groove, and a rotating block with a spherical structure is rotatably connected inside the movable groove.

[0010] Preferably, the top-holding assembly includes a bottom rod, a top-holding rod, and an auxiliary rod. The rotating block has an internal movable cavity, which is a T-shaped cylindrical groove. The bottom rod is movably inserted into the movable cavity and is a T-shaped rod. The top-holding rod is fixed to the top of the bottom rod and is a circular rod. The top of the top-holding rod passes through the top of the rotating block and the top groove and is located outside the top of the control platform. A support spring is fixed between the bottom of the movable cavity and the top of the bottom rod and the top of the top rod. The support spring is sleeved on the outer ring surface of the bottom rod.

[0011] Preferably, the bottom rod and the top holding rod are hollow inside, and the auxiliary rod is movably inserted into the bottom rod and the top holding rod. A magnet is fixedly connected to the bottom of the outer ring surface of the auxiliary rod. Two sets of magnets are symmetrically installed about the center of the auxiliary rod. The magnets are in movable contact with the bottom of the bottom rod, and a notch is opened at the bottom of the bottom rod. A handle is fixed to the bottom outer ring surface of the bottom of the bottom rod.

[0012] Preferably, the auxiliary rod is an inverted "T" shaped rod, and a compression spring is fixed between the top of the bottom rod and the bottom of the top rod of the auxiliary rod. The compression spring is sleeved on the outer ring surface of the top rod of the auxiliary rod, and a handle is fixed at the bottom of the auxiliary rod.

[0013] Preferably, the bottom of the mounting platform is integrally formed with a movable platform. The bottom of the movable platform has a limiting groove, which is a polygonal plate-shaped groove. The bottom of the control platform is movably inserted into the limiting groove. The top of the limiting groove has a receiving hole, which is a circular groove. The top of the top holding rod is movably inserted into the receiving hole. An auxiliary ball is fixedly connected to the bottom of the outer ring surface of the movable platform. The auxiliary ball has a spherical structure. The outer ring surface of the limiting platform is integrally formed with an operating platform. The bottom of the operating platform is fixedly connected with an extension platform, which is an annular plate. The top of the extension platform has a sliding groove, which is an annular groove with an arc-shaped cross-section. A slider is slidably connected in the sliding groove, and the auxiliary ball is rotatably connected to the inner ring surface of the slider.

[0014] Preferably, the top of the limiting groove is provided with an inclined groove, and multiple sets of inclined grooves are arranged in a circular array about the center of the movable platform. The outer ring surface of the mounting platform is provided with an opening groove, which is an arc-shaped plate-shaped groove structure. The opening groove communicates with the receiving hole. The limiting plate is an arc-shaped plate and is movably inserted into the opening groove. One end of the limiting plate is fixedly connected to an extension plate, which is an arc-shaped plate and is in movable contact with the top of the top holding rod. The bottom of the limiting plate is fixedly connected to a positioning block.

[0015] Preferably, the bottom of the opening groove is provided with a sliding groove, which is a square plate-shaped groove structure. A positioning rod is fixedly connected to the inner side of the sliding groove. The positioning rod is a round rod, and the positioning block is a square plate. The positioning block is slidably connected in the sliding groove, and a through hole is provided on the side of the positioning block. The positioning rod passes through the through hole. A spring is fixedly connected between the side of the sliding groove away from the top holding rod and the side of the positioning block. The spring is sleeved on the outer ring surface of the positioning rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are: the top holding rod can be movably inserted into a certain set of inclined slots to drive the movable platform and the mounting table to rotate around the auxiliary ball, thereby tilting the mounting table and facilitating multi-angle processing of the tool. Attached Figure Description

[0017] Figure 1 This is a bottom view of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 3 This is a partial structural diagram of the present invention.

[0020] Figure 4 This is a partial cross-sectional view of the structure of the present invention.

[0021] Figure 5 for Figure 4 Enlarged diagram of point B in the middle.

[0022] Figure 6 for Figure 4 Enlarged diagram of point A in the middle.

[0023] Figure 7 This is a schematic diagram of the overall structure of the activity platform of the present invention.

[0024] Figure 8 This is a half-sectional schematic diagram of the active platform structure of the present invention.

[0025] Figure 9 This is a schematic diagram of the overall structure of the control platform of the present invention.

[0026] Figure 10This is a half-sectional schematic diagram of the control platform structure of the present invention.

[0027] Figure 11 This is a schematic diagram of the overall structure of the top support rod of the present invention.

[0028] Figure 12 This is a schematic diagram of the overall structure of the auxiliary rod of the present invention.

[0029] Figure 13 This is a schematic diagram of the overall structure of the limiting plate of the present invention.

[0030] In the diagram: 1. Movable platform; 2. Auxiliary ball; 3. Mounting platform; 4. Opening groove; 5. Sliding groove; 6. Positioning rod; 7. Limiting plate; 8. Positioning block; 9. Through hole; 90. Spring 1; 10. Extension plate; 11. Limiting platform; 12. Control platform; 13. Engaging plate; 14. Movable groove; 15. Rotating groove; 16. Top groove; 17. Bottom groove; 18. Receiving hole; 19. Rotating block; 20. Movable cavity; 21. 21. Base rod; 22. Top holding rod; 23. Support spring; 24. Inner cavity; 25. Auxiliary rod; 26. Compression spring; 27. Magnet block; 28. Notch; 29. ​​Handle; 30. Pull handle; 31. Meshing tooth plate; 32. Operating platform; 33. Extension platform; 34. Slide groove; 35. Slider; 36. Motor; 37. Electric telescopic rod; 38. Support plate; 39. Auxiliary ring groove; 40. Limiting groove; 41. Inclined groove. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1, please refer to Figures 1 to 13 The present invention provides a technical solution: a turntable mechanism applied to a five-axis machining center, including a support plate 38, the bottom of the support plate 38 being rotatably connected to the telescopic end of an electric telescopic rod 37, the top of the support plate 38 being rotatably connected to the bottom of a control platform 12, a limit platform 11 being fixed on the surface of an operating platform 32, a top holding component being movably inserted into the bottom of the control platform 12, a mounting platform 3 being movably connected to the top of the control platform 12, a limit plate 7 being movably inserted into the outer ring surface of the mounting platform 3, and the top holding component being in movable contact with the limit plate 7, and one end of the limit plate 7 being in movable contact with the inner side of the limit platform 11; In the second embodiment, based on the first embodiment, the support plate 38 is in a "匚"-shaped plate structure, an auxiliary annular groove 39 is provided on the bottom of the control platform 12, the auxiliary annular groove 39 is an annular plate-shaped groove structure, the tops of the two side plates of the support plate 38 are arc-shaped, the tops of the two side plates of the support plate 38 are rotatably connected in the auxiliary annular groove 39, the control platform 12 is a polygonal plate structure, meshing plates 13 are fixedly installed on the outer side of the control platform 12, multiple groups of meshing plates 13 are provided, the multiple groups of meshing plates 13 are distributed in a circumferential array about the center of the control platform 12, one side of the meshing plate 13 is in meshing fit with a meshing toothed plate 31, an electric motor 36 is fixedly installed at the bottom of the meshing toothed plate 31, a bottom groove 17 is provided on the bottom of the control platform 12, a rotating groove 15 and a top groove 16 are provided on the top of the control platform 12, the rotating groove 15 is an arc-shaped groove, a movable groove 14 is provided inside the control platform 12, the movable groove 14 is a spherical groove, the bottom groove 17 communicates with the rotating groove 15 and the movable groove 14, a rotating block 19 is rotatably connected in the movable groove 14, and the rotating block 19 is a spherical structure; In the present invention, pulling the handle 29 drives the bottom rod 21 and the jacking rod 22 to move downward as a whole until the top of the jacking rod 22 is completely located inside the control platform 12, then rotating the handle 29 enables the jacking rod 22 to be located in the rotating groove 15, the whole jacking rod 22 is in an inclined state at this time, then releasing the handle 29, under the jacking action of the support spring 23, the jacking rod 22 will be movably inserted into a certain group of inclined grooves 41, In the third embodiment, based on the second embodiment, the jacking assembly comprises a bottom rod 21, a jacking rod 22 and an auxiliary rod 25, a movable cavity 20 is provided inside the rotating block 19, the movable cavity 20 is a "T"-shaped cylindrical groove, the bottom rod 21 is movably inserted in the movable cavity 20, the bottom rod 21 is a "T"-shaped rod, the jacking rod 22 is fixedly connected to the top of the bottom rod 21, the jacking rod 22 is a circular rod, the top of the jacking rod 21 passes through the top of the rotating block 19 and the top groove 16 and is located at the outer top of the control platform 12, a support spring 23 is fixedly connected between the bottom of the movable cavity 20 and the top of the top rod of the bottom rod 21, the support spring 23 is sleeved on the outer annular surface of the bottom rod portion of the bottom rod 21, the interior of the whole of the bottom rod 21 and the jacking rod 22 is arranged as hollow, the auxiliary rod 25 is movably inserted into the interior of the whole of the bottom rod 21 and the jacking rod 22, magnet blocks 27 are fixedly connected to the bottom of the outer annular surface of the auxiliary rod 25, two groups of the magnet blocks 27 are symmetrically installed about the center of the auxiliary rod 25, the magnet blocks 27 are in movable contact with the bottom of the bottom rod 21, a notch 28 is provided on the bottom of the bottom rod 21, and a handle 29 is fixedly installed on the outer annular surface of the bottom of the bottom rod 21; In the present invention, when the top of the jacking rod 22 is completely located inside the control platform 12, the top of the jacking rod 22 is no longer in movable contact with one end of the extension plate 10, therefore, under the action of the first spring 90, the limiting plate 7 will move toward the center of the opening groove 4 until the limiting plate 7 is completely located inside the opening groove 4, and the outer annular surface of the limiting plate 7 is no longer in contact with the inner side of the limiting platform 11.

[0033] In Example 4, based on Example 3, the auxiliary rod 25 is an inverted "T" shaped rod. A compression spring 26 is fixed between the top of the bottom rod of the auxiliary rod 25 and the bottom of the top rod of the bottom rod 21. The compression spring 26 is sleeved on the outer ring surface of the top rod of the auxiliary rod 25. A handle 30 is fixed to the bottom of the auxiliary rod 25. The bottom of the mounting platform 3 is integrally formed with a movable platform 1. A limit groove 40 is opened at the bottom of the movable platform 1. The limit groove 40 is a polygonal plate-shaped groove. The bottom of the control platform 12 is movably inserted into the limit groove 40. The top of the limit groove 40 is open. A receiving hole 18 is provided, which is a circular groove. The top of the top holding rod 22 is movably inserted into the receiving hole 18. An auxiliary ball 2 is fixedly connected to the bottom of the outer ring surface of the movable platform 1. The auxiliary ball 2 has a spherical structure. An operating platform 32 is integrally formed on the outer ring surface of the limiting platform 11. An extension platform 33 is fixedly connected to the bottom of the operating platform 32. The extension platform 33 is an annular plate. A sliding groove 34 is provided on the top of the extension platform 33. The sliding groove 34 is an annular groove with an arc-shaped cross-section. A slider 35 is slidably connected in the sliding groove 34. The auxiliary ball... 2. A rotatable connection is made to the inner ring surface of the slider 35. A sloping groove 41 is provided at the top of the limiting groove 40. Multiple sets of sloping grooves 41 are arranged in a circular array about the center of the movable platform 1. An opening groove 4 is provided on the outer ring surface of the mounting platform 3. The opening groove 4 has an arc-shaped plate-like groove structure and communicates with the receiving hole 18. The limiting plate 7 is an arc-shaped plate and is movably inserted into the opening groove 4. One end of the limiting plate 7 is fixedly connected to an extension plate 10. The extension plate 10 is an arc-shaped plate and movably contacts the top of the top holding rod 22. A positioning block 8 is fixedly connected to the bottom of the limiting plate 7. A sliding groove 5 is provided at the bottom of the opening groove 4. The sliding groove 5 has a square plate-shaped groove structure. A positioning rod 6 is fixedly connected to the inner side of the sliding groove 5. The positioning rod 6 is a round rod. The positioning block 8 is a square plate. The positioning block 8 is slidably connected in the sliding groove 5. A through hole 9 is provided on the side of the positioning block 8. The positioning rod 6 passes through the through hole 9. A spring 90 is fixedly connected between the side of the sliding groove 5 away from the top holding rod 22 and the side of the positioning block 8. The spring 90 is sleeved on the outer ring surface of the positioning rod 6. In this invention, the electric telescopic rod 37 is activated to move the support plate 38 downwards. The downward movement of the support plate 38 causes the control platform 12 to move downwards as a whole until the top of the control platform 12 is disengaged from the limiting groove 40. At this point, the movable platform 1 is no longer limited by the control platform 12. The top holding rod 22 can be movably inserted into a set of inclined grooves 41 to drive the movable platform 1 and the mounting table 3 to rotate around the auxiliary ball 2, thereby tilting the mounting table 3 and facilitating multi-angle processing of the tool. After the tilt angle is adjusted, the auxiliary rod 25 is rotated by the handle 30. The auxiliary rod 25 rotates and the magnet block 27 rotates synchronously until the magnet block 27 can be movably inserted into the notch 28. The notch 28 is provided with a magnet that attracts the magnet block 27. When the magnet block 27 is movably inserted into the notch 28, it is convenient to further fix the bottom rod 21 and the auxiliary rod 25 as a whole.

[0034] The working principle and usage process of this invention: Starting the motor 36 drives the meshing toothed plate 31 to rotate. The rotation of the meshing toothed plate 31 drives the meshing plate 13 and the control platform 12 to rotate as a whole, thereby driving the mounting platform 3 to rotate, thus achieving angle adjustment of one plane of the mounting platform 3. Pulling the handle 29 moves the bottom rod 21 and the top holding rod 22 downwards as a whole until the top of the top holding rod 22 is completely inside the control platform 12. Then, rotating the handle 29 makes the top holding rod 22 located in the rotating groove 15. At this time, the top holding rod 22 is in an inclined state. Releasing the handle 29, under the supporting spring 23, the top holding rod 22 will move into a set of inclined grooves 41. When the top of the top holding rod 22 is completely inside the control platform 12, the top of the top holding rod 22 will no longer be in contact with one end of the extension plate 10. Therefore, under the action of the spring 90, the limiting plate 7 will move towards the center of the opening groove 4 until the limiting plate 7 is completely inside the opening groove 4. The outer ring of the limiting plate 7 no longer contacts the inner side of the limiting platform 11; the electric telescopic rod 37 is activated to drive the support plate 38 to move down, and the support plate 38 moves down to drive the control platform 12 to move down as a whole until the top of the control platform 12 is disengaged from the limiting groove 40. At this time, the movable platform 1 is no longer limited by the control platform 12. The top holding rod 22 can be movably inserted into a set of inclined grooves 41 to drive the movable platform 1 and the mounting table 3 to rotate around the auxiliary ball 2, so as to tilt the mounting table 3 and facilitate multi-angle processing of the tool; after the tilt angle is adjusted, the auxiliary rod 25 is rotated by the handle 30, and the magnet block 27 is also rotated synchronously until the magnet block 27 can be movably inserted into the notch 28. The notch 28 is provided with a magnet that attracts the magnet block 27. When the magnet block 27 is movably inserted into the notch 28, it is convenient to further fix the bottom rod 21 and the auxiliary rod 25 as a whole.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotary table mechanism for a five-axis machining center, comprising a support plate (38), the bottom of which is rotatably connected to the telescopic end of an electric telescopic rod (37), the top of which is rotatably connected to the bottom of a control platform (12), and a limit platform (11) fixed to the surface of an operating platform (32), characterized in that: A jacking assembly is movably inserted into the bottom of said control platform (12), a mounting table (3) is movably lapped on the top of the control platform (12), a limiting plate (7) is movably inserted into the outer annular surface of the mounting table (3), the jacking assembly is in movable contact with the limiting plate (7), and one end of the limiting plate (7) is in movable contact with the inner side of the limiting platform (11); A bottom groove (17) is provided at the bottom of the control platform (12), a rotation groove (15) and a jacking groove (16) are provided at the top of the control platform (12), the rotation groove (15) is an arc-shaped groove, a movable groove (14) is provided inside the control platform (12), the movable groove (14) is a spherical groove, the bottom groove (17) communicates with the rotation groove (15) and the movable groove (14), a rotating block (19) is rotatably connected in the movable groove (14), and the rotating block (19) has a spherical structure; said jacking assembly comprises a bottom rod (21), a jacking rod (22) and an auxiliary rod (25), a movable cavity (20) is provided inside the rotating block (19), the movable cavity (20) is a T-shaped cylindrical groove, the bottom rod (21) is movably inserted into the movable cavity (20), the bottom rod (21) is a T-shaped rod, the jacking rod (22) is fixedly arranged at the top of the bottom rod (21), the jacking rod (22) is a circular rod, the top of the jacking rod (22) passes through the top of the rotating block (19) and the jacking groove (16) and is located at the outer top of the control platform (12), a support spring (23) is fixedly arranged between the bottom of the movable cavity (20) and the top of the top rod of the bottom rod (21), and the support spring (23) is sleeved on the outer annular surface of the bottom rod portion of the bottom rod (21).

2. The rotary table mechanism applied to a five-axis machining center according to claim 1, characterized in that: Said support plate (38) has a U-shaped plate structure, an auxiliary annular groove (39) is provided at the bottom of the control platform (12), the auxiliary annular groove (39) is an annular plate-shaped groove structure, the tops of the two side plates of the support plate (38) are arc-shaped, and the tops of the two side plates of the support plate (38) are rotatably connected in the auxiliary annular groove (39).

3. The rotary table mechanism applied to a five-axis machining center according to claim 1, characterized in that: Said control platform (12) has a polygonal plate structure, engaging plates (13) are fixedly installed on the outer side of the control platform (12), multiple groups of the engaging plates (13) are provided, the multiple groups of engaging plates (13) are distributed in a circumferential array about the center of the control platform (12), one side of the engaging plates (13) is in engaging fit with an engaging tooth plate (31), and a motor (36) is fixedly installed at the bottom of the engaging tooth plate (31).

4. A rotary table mechanism for a five-axis machining center according to claim 3, characterized in that: The interior of the whole of said bottom rod (21) and jacking rod (22) is hollow, the auxiliary rod (25) is movably inserted into the interior of the whole of the bottom rod (21) and the jacking rod (22), magnet blocks (27) are fixedly connected to the bottom of the outer annular surface of the auxiliary rod (25), two groups of the magnet blocks (27) are symmetrically installed about the center of the auxiliary rod (25), the magnet blocks (27) are in movable contact with the bottom of the bottom rod (21), a notch (28) is provided at the bottom of the bottom rod (21), and a handle (29) is fixedly arranged on the outer annular surface of the bottom of the bottom rod (21).

5. A rotary table mechanism for a five-axis machining center according to claim 4, characterized in that: The auxiliary rod (25) is in the shape of an inverted "T". A compression spring (26) is fixed between the top of the bottom rod of the auxiliary rod (25) and the bottom of the top rod of the bottom rod (21). The compression spring (26) is sleeved on the outer ring surface of the top rod of the auxiliary rod (25). A handle (30) is fixed at the bottom of the auxiliary rod (25).

6. A rotary table mechanism for a five-axis machining center according to claim 1, characterized in that: The bottom of the mounting platform (3) is integrally formed with a movable platform (1). A limiting groove (40) is opened at the bottom of the movable platform (1). The limiting groove (40) is a polygonal plate-shaped groove. The bottom of the control platform (12) is movably inserted into the limiting groove (40). A receiving hole (18) is opened at the top of the limiting groove (40). The receiving hole (18) is a circular groove. The top of the top holding rod (22) is movably inserted into the receiving hole (18). An auxiliary device is fixedly connected to the bottom of the outer ring surface of the movable platform (1). The auxiliary ball (2) has a spherical structure. The outer ring surface of the limiting platform (11) is integrally formed with an operating platform (32). The bottom of the operating platform (32) is fixedly connected to an extension platform (33). The extension platform (33) is an annular plate. The top of the extension platform (33) is provided with a sliding groove (34). The sliding groove (34) is an annular groove with an arc-shaped cross section. A slider (35) is slidably connected in the sliding groove (34), and the auxiliary ball (2) is rotatably connected to the inner ring surface of the slider (35).

7. A rotary table mechanism for a five-axis machining center according to claim 6, characterized in that: The top of the limiting groove (40) is provided with an inclined groove (41). The inclined groove (41) is arranged in a circular array about the center of the movable platform (1). The outer ring surface of the mounting platform (3) is provided with an opening groove (4). The opening groove (4) is an arc-shaped plate-shaped groove structure. The opening groove (4) is connected to the receiving hole (18). The limiting plate (7) is an arc-shaped plate. The limiting plate (7) is movably inserted into the opening groove (4). One end of the limiting plate (7) is fixedly connected to an extension plate (10). The extension plate (10) is an arc-shaped plate. The extension plate (10) is in movable contact with the top of the top holding rod (22). The bottom of the limiting plate (7) is fixedly connected to a positioning block (8).

8. A rotary table mechanism for a five-axis machining center according to claim 7, characterized in that: The bottom of the opening groove (4) is provided with a sliding groove (5). The sliding groove (5) is a square plate-shaped groove structure. A positioning rod (6) is fixedly connected to the inner side of the sliding groove (5). The positioning rod (6) is a round rod. The positioning block (8) is a square plate. The positioning block (8) is slidably connected in the sliding groove (5). A through hole (9) is provided on the side of the positioning block (8). The positioning rod (6) passes through the through hole (9). A spring (90) is fixedly connected between the side of the sliding groove (5) away from the top holding rod (22) and the side of the positioning block (8). The spring (90) is sleeved on the outer ring surface of the positioning rod (6).

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