Composite rotary table with inner rotor and outer rotor

Abstract

The utility model discloses an inner and outer rotor composite rotary table, which comprises a working table, a rotary table shell, and an inner rotor, an inner stator, an outer stator and an outer rotor which are coaxially arranged from inside to outside, the working table is rotatably connected with the rotary table shell, and a cavity for accommodating the inner rotor, the outer rotor, the inner stator and the outer stator is formed between the working table and the rotary table shell; the inner stator and the outer stator are arranged on the rotary table shell, and the outer rotor and the inner rotor are arranged on the workbench. An inner rotor, an inner stator, an outer stator and an outer rotor are arranged between a workbench and a rotary table shell, so that a group of inner rotor motors and a group of outer rotor motors are arranged in the rotary table, the two groups of motors are designed according to a high-speed motor and a low-speed motor respectively, and the rotary table can be switched between high-speed small torque and low-speed large torque; performance parameters of the two sets of motors are mutually independent, dependence and restriction do not exist, and the torque and rotating speed adjusting range is larger.

Description

Technical Field

[0001] The utility model relates to the technical field of numerically controlled machine tools, in particular to an inner and outer rotor composite turntable. Background Art

[0002] CNC machine tools play a vital role in modern manufacturing. As a key component in CNC machine tools responsible for controlling the rotation of the workpiece, the role of the turntable cannot be underestimated. The speed and torque of the turntable are limited by the motor. Under the same power, high-speed turntables often have lower torque, while high-torque turntables have relatively low speeds. The application requirements of turntables are constantly evolving, especially for turning-milling CNC machine tools, which have an increasing demand for speed. The turntable needs to have the ability to have low speed and high torque in milling operations, while it must meet high speed requirements in turning operations. These two requirements need to coexist in actual applications. How to take both into account has become the focus of turntable design.

[0003] The currently widely adopted solution is to design the turntable motor as a dual-winding type, that is, the stator winding of the turntable motor is designed to have two operating modes: high-speed and low-speed. By switching the operating mode, the driving characteristics of high-speed low torque and low-speed high torque are achieved. A specific switching speed threshold is set. When the motor speed is lower than this threshold, the motor will operate in low-speed mode, and when the speed exceeds this threshold, it will switch to high-speed mode. Although this solution broadens the range of turntable torque and speed, the two modes provided by the dual winding cannot be arbitrarily combined to define parameters. Comprehensive consideration and balanced matching must be made during design. If the turntable requires two sets of operating modes with very different parameters, it cannot be achieved with a dual-winding solution alone. Summary of the Invention

[0004] The utility model provides an inner and outer rotor composite turntable, so as to provide a turntable which takes into account both low-speed and high-torque requirements and high-speed requirements.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] An inner-outer rotor composite turntable comprises: a worktable, a turntable housing, and an inner rotor, an inner stator, an outer stator, and an outer rotor coaxially arranged from the inside out, the worktable and the turntable housing being rotatably connected, and a cavity for accommodating the inner rotor, outer rotor, inner stator, and outer stator being formed between the worktable and the turntable housing;

[0007] The inner stator and the outer stator are arranged on the turntable shell, and the outer rotor and the inner rotor are arranged on the workbench.

[0008] Furthermore, the workbench includes a workbench body and a rotary shaft, the workbench body is fixed to the end of the rotary shaft, and the inner rotor is sleeved and fixed on the rotary shaft;

[0009] It also includes a support body fixed on the workbench body, and the outer rotor is vertically fixed on the support body.

[0010] Furthermore, it also includes a stator cooling jacket fixed on the turntable shell, the stator cooling jacket is located between the inner stator and the outer stator, and the inner stator and the outer stator are fixed on the stator cooling jacket.

[0011] Furthermore, a male stop is provided on the top of the turntable housing, and a female stop is provided on the workbench opposite to the male stop, and the male stop and the female stop form a labyrinth seal.

[0012] Furthermore, an annular groove is provided on the male stop, a ventilation groove is provided on the bottom surface of the annular groove, an air inlet hole connected to the ventilation groove is provided on the turntable shell, an air-sealing cover plate is provided in the annular groove, the air-sealing cover plate covers the ventilation groove, and the air-sealing cover plate is evenly distributed with through holes.

[0013] Furthermore, it also includes a sealing steel belt arranged on the turntable shell, with a gap left between the sealing steel belt and the workbench, and the sealing steel belt is located on the outer periphery of the labyrinth seal.

[0014] Furthermore, it also includes a pneumatic clamp, which is fixed on the turntable shell and can lock the workbench.

[0015] Furthermore, it also includes an angle encoder and a flange plate arranged on the workbench, the angle encoder includes a circular grating and a reading head arranged opposite to each other, the circular grating is arranged on the flange plate, and the reading head is arranged on the turntable housing.

[0016] Furthermore, the turntable housing is provided with a cooling inlet and a cooling outlet connected to the stator cooling jacket.

[0017] Furthermore, the outer stator is sleeved on the outer periphery of the stator cooling jacket, and the outer stator and the stator cooling jacket are interference fit; the stator cooling jacket is sleeved on the outer periphery of the inner stator, and the stator cooling jacket and the inner stator are interference fit.

[0018] Beneficial effects:

[0019] Compared with the existing turntable with a double-winding motor, the utility model provides an inner and outer rotor composite turntable. By arranging an inner rotor and an inner stator as well as an outer stator and an outer rotor between the workbench and the turntable shell, the turntable contains a group of inner rotor motors and a group of outer rotor motors. The two groups of motors are designed as high-speed motors and low-speed motors respectively, so that the turntable can switch between high speed and low torque and low speed and high torque. The performance parameters of the two groups of motors are independent of each other, there is no dependence or restriction, and the torque and speed adjustment range is larger. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] Figure 1 This is a structural schematic diagram of an inner and outer rotor composite turntable disclosed in the utility model;

[0022] Figure 2 for Figure 1 A magnified view of point A;

[0023] Figure 3 for Figure 2 Enlarged view of point C;

[0024] Figure 4 for Figure 1 Enlarged view of point B;

[0025] Figure 5 This is a structural schematic diagram of a working table, inner rotor and outer rotor of an inner and outer rotor composite turntable disclosed in the utility model;

[0026] Figure 6 This is a schematic diagram of an airtight cover plate of an inner and outer rotor composite turntable disclosed in the present utility model.

[0027] In the picture:

[0028] 1. Workbench; 101. Workbench body; 102. Rotating shaft; 2. Inner rotor; 201. Inner rotor magnet; 202. Inner rotor yoke; 3. Inner stator; 4. Outer stator; 5. Outer rotor; 501. Outer rotor magnet; 502. Outer rotor yoke; 6. Stator cooling jacket; 7. Pneumatic clamp; 8. Flange; 9. Circular grating; 10. Reading head; 11. Cooling inlet; 12. Cooling outlet; 13. Male stopper; 14. Female stopper; 15. Air-sealing cover; 16. Vent groove; 17. Sealing steel belt; 18. Turntable bearing; 19. Bearing; 20. Main body; 21. Chassis; 22. Bearing seat; 23. Bottom cover; 24. Locking nut; 25. Support body. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0030] This embodiment provides an inner and outer rotor composite turntable, such as Figure 1 As shown, it includes: a workbench 1, a turntable housing, and an inner rotor 2, an inner stator 3, an outer stator 4, and an outer rotor 5 coaxially arranged from the inside to the outside. The workbench 1 and the turntable housing are rotatably connected, and a cavity is formed between the workbench 1 and the turntable housing to accommodate the inner rotor 2, the outer rotor 5, the inner stator 3, and the outer stator 4;

[0031] The inner stator 3 and the outer stator 4 are arranged on the turntable housing, and the outer rotor 5 and the inner rotor 2 are arranged on the workbench 1. In this embodiment, the outer rotor 5 is fixedly connected to the workbench 1 by bolts, and the inner rotor 2 is interference fit with the workbench 1.

[0032] Compared to the existing turntables equipped with dual-winding motors, the present embodiment provides an inner-outer rotor composite turntable. By arranging an inner rotor 2 and an inner stator 3, as well as an outer stator 4 and an outer rotor 5, between the worktable 1 and the turntable housing, the turntable contains one inner rotor motor and one outer rotor motor. The two motors are designed as high-speed motors and low-speed motors, respectively. Through switching control systems, they are controlled individually or synchronously with dual drive, enabling the turntable to switch between high speed and low torque and low speed and high torque. The performance parameters of the two motors are independent of each other, without dependence or restriction, and the torque and speed adjustment range is wider.

[0033] The inner rotor motor is located inside the outer rotor motor. The inner rotor motor does not take up additional space in the axial direction of the turntable, which reduces the height of the turntable and makes the height of the turntable lower. When the worktable 1 carries a workpiece, the center of gravity is lower and the rotation is smoother.

[0034] In a specific embodiment, Figure 5 As shown, the workbench 1 includes a workbench body 101 and a rotary shaft 102. The workbench body 101 is fixed to the end of the rotary shaft 102. In this embodiment, the workbench body 101 and the rotary shaft 102 are integrally formed.

[0035] The inner rotor 2 includes an inner rotor magnet 201 and an inner rotor yoke 202. The inner rotor magnet 201 is fixed to the inner rotor yoke 202. The inner rotor yoke 202 is sleeved on the rotating shaft 102. The inner rotor yoke 202 and the rotating shaft 102 have an interference fit.

[0036] It also includes a support body 25 fixed to the workbench body 101 by bolts, and the outer rotor 5 includes an outer rotor magnet 501 and an outer rotor yoke 502. The outer rotor magnet 501 is fixed on the outer rotor yoke 502, and the outer rotor yoke 502 is vertically fixed to the end of the support body 25. The support body 25 allows a space to be formed between the outer rotor 5 and the rotating shaft 102 to accommodate the inner rotor 2, the inner stator 3 and the outer stator 4. In this embodiment, the outer rotor yoke 502 and the support body 25 are formed as one piece.

[0037] In a specific embodiment, Figure 1 As shown, the turntable housing includes a main body 20, a chassis 21, a bearing seat 22 and a bottom cover 23 connected to each other by bolts to facilitate the disassembly and assembly of the turntable;

[0038] In this embodiment, if Figure 2 As shown, the workbench body 101 and the main body 20 of the workbench 1 are rotatably connected through the turntable bearing 18, as shown in FIG. Figure 4 As shown, the rotary shaft 102 of the workbench 1 is rotatably connected to the bearing seat 22 via the bearing 19 , and the workbench 1 is sleeved with a locking nut 24 to limit the axial position of the bearing 19 .

[0039] In a specific embodiment, Figure 1 As shown, the stator cooling jacket 6 is further included, which is fixed to the chassis 21 by bolts. The stator cooling jacket 6 is located between the inner stator 3 and the outer stator 4 to cool the inner stator 3 and the outer stator 4 at the same time. The inner stator 3 and the outer stator 4 are fixed to the stator cooling jacket 6.

[0040] In this embodiment, the outer stator 4 is sleeved on the outer periphery of the stator cooling jacket 6, and the outer stator 4 and the stator cooling jacket 6 are interference fit. The stator cooling jacket 6 is sleeved on the outer periphery of the inner stator 3, and the stator cooling jacket 6 and the inner stator 3 are interference fit.

[0041] In a specific embodiment, Figure 3 As shown, a male stop 13 is provided on the top of the main body 20, and a female stop 14 is provided on the workbench 1 opposite to the male stop 13, and the male stop 13 and the female stop 14 form a labyrinth seal;

[0042] like Figure 3 As shown, the male stopper 13 is provided with an annular groove, the bottom surface of the annular groove is provided with a vent groove 16, the main body 20 is provided with an air inlet hole connected to the vent groove 16, the annular groove is provided with an airtight cover plate 15, the airtight cover plate 15 covers the vent groove 16, as shown in FIG. Figure 6 As shown, the airtight cover plate 15 is evenly distributed with through holes to facilitate uniform air discharge;

[0043] The vent groove 16 is connected to the air source through the air inlet hole, and the airtight cover plate 15 is fixed to the main body 20 by screws (the screw holes of the airtight cover plate 15 are not in the Figure 6 As shown in the figure, it can be opened at a position that does not coincide with the through hole), the air source introduces compressed air into the ventilation groove 16 from the air inlet, and the compressed air flows along the circumferential direction of the ventilation groove 16, and is evenly discharged through the through holes evenly distributed on the air-sealing cover plate 15, ensuring that the inside of the labyrinth seal maintains positive pressure and uniform pressure, forming an airtight seal. The labyrinth seal and the airtight seal form double protection to prevent impurities such as cutting chips and dust from entering the turntable.

[0044] In a specific embodiment, Figure 3 As shown, it also includes a sealing steel belt 17 arranged on the turntable shell, and a gap is left between the sealing steel belt 17 and the workbench 1 to avoid affecting the normal rotation of the workbench 1. The sealing steel belt 17 is located on the periphery of the labyrinth seal. The sealing steel belt 17 is used to prevent the flushing water in the processing area from entering the labyrinth seal.

[0045] In a specific embodiment, Figure 1 As shown, it also includes a pneumatic clamp 7, which is fixed on the main body 20. After ventilation, the pneumatic clamp 7 can clamp the workbench 1 to achieve positioning and locking (the pneumatic clamp 7 is existing technology, and the specific structure will not be repeated).

[0046] In a specific embodiment, Figure 4 As shown, it also includes an angle encoder and a flange 8 arranged on the workbench 1. The angle encoder is a circular grating angle encoder. The flange 8 is fixed to the rotating shaft 102 of the workbench 1 by bolts, providing a mounting base for the circular grating 9. The angle encoder includes a circular grating 9 and a reading head 10 arranged relatively. The circular grating 9 is arranged on the flange 8, and the reading head 10 is fixed to the bearing seat 22 by bolts.

[0047] In a specific embodiment, Figure 1 As shown, the chassis 21 is provided with a cooling inlet 11 and a cooling outlet 12 communicating with the stator cooling jacket 6 , and the stator cooling jacket 6 is communicated with an external cooling system through the cooling inlet 11 and the cooling outlet 12 .

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An inner and outer rotor composite turntable, characterized in that: include: A workbench (1), a turntable housing, and an inner rotor (2), an inner stator (3), an outer stator (4), and an outer rotor (5) coaxially arranged from the inside to the outside, wherein the workbench (1) and the turntable housing are rotatably connected, and a cavity for accommodating the inner rotor (2), the outer rotor (5), the inner stator (3), and the outer stator (4) is formed between the workbench (1) and the turntable housing; The inner stator (3) and the outer stator (4) are arranged on the turntable shell, and the outer rotor (5) and the inner rotor (2) are arranged on the workbench (1).

2. The inner and outer rotor composite turntable according to claim 1, characterized in that: The workbench (1) comprises a workbench body (101) and a rotary shaft (102); the workbench body (101) is fixed to the end of the rotary shaft (102); and the inner rotor (2) is sleeved and fixed on the rotary shaft (102); It also includes a support body (25) fixed on the workbench body (101), and the outer rotor (5) is vertically fixed on the support body (25).

3. The inner and outer rotor composite turntable according to claim 1, characterized in that: It also includes a stator cooling jacket (6) fixed on the turntable shell, wherein the stator cooling jacket (6) is located between the inner stator (3) and the outer stator (4), and the inner stator (3) and the outer stator (4) are fixed on the stator cooling jacket (6).

4. The inner and outer rotor composite turntable according to claim 1, characterized in that: A male stop (13) is provided on the top of the turntable housing, and a female stop (14) is provided on the workbench (1) opposite to the male stop (13). The male stop (13) and the female stop (14) form a labyrinth seal.

5. The inner and outer rotor composite turntable according to claim 4, characterized in that: The male stop (13) is provided with an annular groove, the bottom surface of the annular groove is provided with a ventilation groove (16), the turntable shell is provided with an air inlet hole connected to the ventilation groove (16), an air-sealing cover plate (15) is provided in the annular groove, the air-sealing cover plate (15) covers the ventilation groove (16), and the air-sealing cover plate (15) is evenly distributed with through holes.

6. The inner and outer rotor composite turntable according to claim 4, characterized in that: It also includes a sealing steel belt (17) arranged on the turntable shell, with a gap between the sealing steel belt (17) and the workbench (1), and the sealing steel belt (17) is located on the outer periphery of the labyrinth seal.

7. The inner and outer rotor composite turntable according to claim 1, characterized in that: It also includes a pneumatic clamp (7), which is fixed on the turntable shell and can lock the workbench (1).

8. The inner and outer rotor composite turntable according to claim 1, characterized in that: It also includes an angle encoder and a flange (8) arranged on the workbench (1), the angle encoder includes a circular grating (9) and a reading head (10) arranged opposite to each other, the circular grating (9) is arranged on the flange (8), and the reading head (10) is arranged on the turntable housing.

9. The inner and outer rotor composite turntable according to claim 3, characterized in that: The turntable housing is provided with a cooling inlet (11) and a cooling outlet (12) which are connected to the stator cooling jacket (6).

10. The inner and outer rotor composite turntable according to claim 3, characterized in that: The outer stator (4) is sleeved on the outer periphery of the stator cooling sleeve (6), and the outer stator (4) and the stator cooling sleeve (6) are interference-fitted; the stator cooling sleeve (6) is sleeved on the outer periphery of the inner stator (3), and the stator cooling sleeve (6) and the inner stator (3) are interference-fitted.

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