Cradle rotary table

Abstract

The cradle rotary table comprises two A-axis rotating mechanisms which are symmetrically arranged, a C-axis rotating mechanism is arranged between the two A-axis rotating mechanisms, the C-axis rotating mechanism comprises a first base, a first rotating device with a first axis is arranged in the C-axis rotating mechanism, and a workbench is coaxially connected to the top of the first rotating device; the first rotating device can drive the workbench to rotate around the first axis, a first annular protrusion is fixedly arranged at the bottom of the workbench and movably covers the top end of the first base, and a first braking part of an elastic film structure is arranged on the circumferential side wall of the top end of the first base. According to the braking device, the first braking part can deform, the circumferential side wall of the first braking part can abut against the circumferential inner wall of the first annular protrusion, and therefore the friction force between the first annular protrusion and the first braking part is increased, stable braking of the workbench is achieved, and safety is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of numerical control processing equipment, and in particular to a cradle turntable. Background Art

[0002] Five-axis CNC machine tools are high-end products among CNC machine tools. The cradle-type double-swing angle turntable is the preferred layout for small five-axis linkage machining centers. The cradle turntable can provide two rotational degrees of freedom along the A-axis and along the C-axis.

[0003] The existing braking methods for the workbench are all achieved by directly controlling the motor to stop and run. The disadvantage of the above braking methods is that the braking is not stable. Therefore, we propose a cradle turntable. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a cradle turntable.

[0005] In a first aspect, the present application provides a cradle turntable, the cradle turntable comprising two symmetrically arranged A-axis rotation mechanisms and a C-axis rotation mechanism arranged between the two A-axis rotation mechanisms, the A-axis rotation mechanism is used to drive the C-axis rotation mechanism to rotate, and the C-axis rotation mechanism comprises:

[0006] A first base, wherein a first rotating device having a first axis is disposed in the first base, a workbench is coaxially connected to the top of the first rotating device for driving the workbench to rotate around the first axis, a first annular protrusion is fixedly disposed at the bottom of the workbench, and a movable cover thereof is disposed at the top of the first base and rotates relative to the first base;

[0007] A first brake component is fixedly provided on the circumferential side wall at the top end of the first base. The first brake component is an elastic film structure. By inputting oil into the first brake component, the first brake component is deformed. The side wall of the first brake component away from the first base can abut against the circumferential inner wall of the first annular protrusion to brake the workbench.

[0008] According to the technical solution provided in the embodiment of the present application, a first mounting groove is provided at the top of the first base, and the first rotating device includes a first rotating shaft having the first axis, the first rotating shaft is rotatably arranged in the first mounting groove, and the top end of the first rotating shaft extends above the first base and is coaxially fixedly connected to the workbench;

[0009] The first rotating device also includes a first motor arranged in the first mounting groove, the first motor has a first rotor and a first stator, and the first stator is sleeved on the outer wall of the first rotor on the first rotating shaft, and the outer wall of the first stator and the inner wall of the first mounting groove are fixedly connected to drive the first rotor to rotate.

[0010] According to the technical solution provided in the embodiment of the present application, a first mounting boss is provided on the top side wall of the first rotating shaft, the first rotating device further comprises a first bearing, which is provided on the top of the first mounting groove, the first bearing having a first inner ring and a first outer ring, the top, the bottom and the inner wall of the first inner ring are respectively fixedly connected to the side wall of the workbench close to the first base, the top of the first mounting boss and the top side wall of the first rotating shaft, and the outer wall of the first outer ring is fixedly connected to the top inner wall of the first mounting groove;

[0011] The first rotating device also includes a second bearing, which is sleeved on the bottom of the first rotating shaft and is used to increase the rotation stability of the first rotating shaft, improve the load-bearing capacity, and increase the rigidity.

[0012] According to the technical solution provided in the embodiment of the present application, connecting parts are provided on both sides of the first base along the first direction, which are used to respectively connect the two A-axis rotation mechanisms, and the A-axis rotation mechanism includes a second base, and a second rotating device with a second axis is provided in the second base, and the second rotating device is used to drive the C-axis rotation mechanism to rotate around the second axis, and the second axis is perpendicular to the first axis.

[0013] According to the technical solution provided in the embodiment of the present application, a connecting block is provided on a side of the second base close to the C-axis rotating mechanism, the connecting block is fixedly connected to the connecting portion, a second mounting groove is provided on a side wall of the second base close to the C-axis rotating mechanism, the second rotating device includes a second rotating shaft, which has a second axis, the second rotating shaft is rotatably arranged in the second mounting groove, one end of the second rotating shaft close to the C-axis rotating mechanism is coaxially fixedly connected to the connecting block, and a second annular protrusion is fixedly provided on a side wall of the connecting block away from the C-axis rotating mechanism, and a movable cover is arranged on one end of the second mounting groove close to the C-axis rotating mechanism;

[0014] The second rotating device also includes a second motor, which has a second rotor and a second stator. The second rotor is fixedly sleeved on the second rotating shaft, and the second stator is sleeved on the outer wall of the second rotor, and its outer wall is fixedly connected to the inner wall of the second mounting groove.

[0015] According to the technical solution provided in the embodiment of the present application, a mounting block is provided on the side wall of the second base close to the C-axis rotation mechanism, which is located on the side of the second annular protrusion away from the second mounting groove, and a second braking member is fixedly provided on the side wall of the mounting block close to the second annular protrusion, which is an elastic film structure, and the second braking member is deformed by inputting oil into the interior of the second braking member, and the side wall of the second braking member close to the second annular protrusion can abut against the circumferential outer wall of the second annular protrusion to brake the connecting block.

[0016] According to the technical solution provided in the embodiment of the present application, a second mounting boss is provided on a side wall of one end of the second rotating shaft close to the connecting block, the second rotating device further comprises a third bearing, the third bearing having a third inner ring and a third outer ring, the inner wall of the third inner ring and two opposite side walls along the first direction are respectively fixedly connected to the side wall of the second rotating shaft, the side wall of the connecting block away from the connecting portion and the side wall of the second mounting boss close to the connecting block, and the third outer ring is fixedly connected to the inner wall of the second mounting groove;

[0017] The second rotating device also includes a fourth bearing, which is sleeved on an end of the second rotating shaft away from the connecting block, and is used to increase the rotation stability of the second rotating shaft and increase the rigidity.

[0018] According to the technical solution provided in the embodiment of the present application, the C-axis rotation mechanism and the A-axis rotation mechanism are both provided with a motor cooling mechanism for cooling the first motor and the second motor;

[0019] The C-axis rotating mechanism and the A-axis rotating mechanism are both provided with closed-loop feedback gratings.

[0020] According to the technical solution provided in the embodiment of the present application, a sealing mechanism is provided on the C-axis rotation mechanism and the A-axis rotation mechanism, and the sealing mechanism includes a plurality of air holes circumferentially arranged on the first base and the mounting block, and the sealing mechanism also includes an air pump for inputting air into the air holes so that the plurality of air holes on the first base and the mounting block spray positive pressure air to form an air curtain, which is used to seal the gap between the workbench and the first base, and the gap between the connecting block and the mounting block to prevent impurities from entering.

[0021] To summarize, the present technical solution specifically discloses a cradle turntable, which includes two symmetrically arranged A-axis rotation mechanisms and a C-axis rotation mechanism arranged between the two A-axis rotation mechanisms, wherein the A-axis rotation mechanism can drive the C-axis rotation mechanism to rotate, wherein the C-axis rotation mechanism includes a first base, wherein a first rotating device having a first axis is arranged inside the first rotating device, a workbench is coaxially connected to the top of the first rotating device, the first rotating device can drive the workbench to rotate around the first axis, a first annular protrusion is fixedly arranged at the bottom of the workbench, and its movable cover is arranged at the top of the first base, and a first braking member is fixedly arranged on the circumferential side wall of the top of the first base, which is an elastic film structure, and the first braking member can be deformed by inputting oil into the first braking member, and its side wall away from the first base can abut against the circumferential inner wall of the first annular protrusion, thereby realizing braking of the workbench, and the circumferential side wall of the first braking member abuts against the circumferential inner wall of the first annular protrusion, thereby increasing the friction between the first annular protrusion and the first braking member, thereby ensuring that the braking of the workbench is more stable and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0023] Figure 1 The utility model is a top view of a cradle turntable.

[0024] Figure 2 The utility model discloses a front sectional view of a cradle turntable.

[0025] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0026] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0027] Figure 5 for Figure 2 Enlarged view of point C in the middle.

[0028] Figure 6 for Figure 2 Enlarged view of point D in the middle.

[0029] Numbers in the figure: 1. A-axis rotation mechanism; 2. C-axis rotation mechanism; 3. first base; 4. workbench; 5. first annular protrusion; 6. first brake; 7. first rotating shaft; 8. first motor; 9. first rotor; 10. first stator; 11. first mounting boss; 12. first bearing; 13. second bearing; 14. second base; 15. connecting block; 16. second rotating shaft; 17. second annular protrusion; 18. second motor; 19. second rotor; 20. second stator; 21. mounting block; 22. second brake; 23. second mounting boss; 24. third bearing; 25. fourth bearing; 26. closed-loop feedback grating; 27. coolant nozzle; 28. air hole; 29. ​​first axis; 30. second axis. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] Embodiment 1

[0033] Please refer to Figure 1 A top view of a cradle turntable is shown, wherein the cradle turntable comprises two symmetrically arranged A-axis rotating mechanisms 1 and a C-axis rotating mechanism 2 arranged between the two A-axis rotating mechanisms 1;

[0034] like Figure 2 As shown, the C-axis rotation mechanism 2 includes a first base 3, a first mounting groove is formed at the top of the first base 3, a first rotating device is arranged in the first mounting groove, the first rotating device has a first axis 29, and a workbench 4 is coaxially fixedly connected to the top of the first rotating device, which can drive the workbench 4 to rotate around the first axis 29;

[0035] Specifically, the first rotating device includes a first rotating shaft 7, the first rotating shaft 7 has a first axis 29, the first rotating shaft 7 is rotatably arranged in the first mounting groove, and the top end of the first rotating shaft 7 extends to the top of the first base 3 and is coaxially fixedly connected with the workbench 4;

[0036] Further, the first rotating device also includes a first motor 8, which is arranged in the first mounting groove, and the first motor 8 has a first rotor 9 and a first stator 10, the first rotor 9 is fixedly sleeved on the first rotating shaft 7, the first stator 10 is sleeved on the outer wall of the first rotor 9, and the outer wall of the first stator 10 is fixedly connected to the inner wall of the first mounting groove, and by starting the first motor 8, the first rotor 9 rotates to drive the first rotating shaft 7 to rotate, thereby driving the workbench 4 to rotate around the first axis 29; wherein the type of the first motor 8 is, for example: a permanent magnet synchronous torque motor;

[0037] Furthermore, if Figure 3 As shown, the first rotating device also includes a first bearing 12, which is arranged at the top of the first mounting groove, and a first mounting boss 11 is arranged on the top side wall of the first rotating shaft 7, which is an annular structure. The first bearing 12 has a first inner ring and a first outer ring, and the top, bottom and inner wall of the first inner ring are respectively fixedly connected with the side wall of the workbench 4 close to the first base 3, the top of the first mounting boss 11 and the circumferential side wall of the top of the first rotating shaft 7, and the circumferential outer wall of the first outer ring is fixedly connected with the circumferential inner wall of the top of the first mounting groove, thereby, in the process of the first motor 8 driving the first rotating shaft 7 to rotate, the first rotating shaft 7 and the workbench 4 can be rotated more stably by arranging the first bearing 12; wherein, the type of the first bearing 12 is, for example: a special bearing for a turntable;

[0038] It should be noted that an annular sealing groove is provided on the circumferential inner wall of the first mounting groove corresponding to the first mounting boss 11, and an annular sealing ring is provided in the annular sealing groove to ensure the relative rotation sealing between the first mounting boss 11 and the first mounting groove;

[0039] Furthermore, if Figure 4 As shown, the first rotating device also includes a second bearing 13, which is sleeved on the bottom end of the first rotating shaft 7. The second bearing 13 has a second inner ring and a second outer ring. The second inner ring is fixedly sleeved on the circumferential side wall of the bottom end of the first rotating shaft 7, and the circumferential outer wall of the second outer ring is fixedly connected to the circumferential inner wall of the bottom end of the first mounting groove. Therefore, by setting the second bearing 13, the rotation stability of the first rotating shaft 7 can be increased, and at the same time, the structural rigidity is increased and the load-bearing capacity is improved.

[0040] The workbench 4 is braked by the first brake member 6;

[0041] Specifically, Figure 3As shown, a first annular protrusion 5 is fixedly provided at the bottom of the workbench 4, and a rotatable cover thereof is provided at the top of the first base 3. A first brake member 6 is fixedly provided on the circumferential side wall of the top of the first base 3, and is an elastic film structure and an annular structure. An oil inlet space is provided inside the first brake member 6, and is connected to an external oil input device. A quantitative amount of oil is input into the oil inlet space through the external oil input device, so that the first brake member 6 can be deformed, and the side wall of the first brake member 6 away from the first base 3 can move toward the first annular protrusion 5 and abut against the inner wall of the first annular protrusion 5, so as to brake the workbench 4. Since the first brake member 6 is an annular structure, the circumferential outer wall of the first brake member 6 can abut against the circumferential inner wall of the workbench 4, thereby improving the braking effect, enabling the workbench 4 to achieve stable braking, and improving safety.

[0042] It should be noted that two annular sealing grooves are arranged along the direction of the first axis 29 on the circumferential outer wall at the top end of the first base 3. The two annular sealing grooves are respectively located on both sides of the oil inlet space in the direction of the first axis 29. An annular sealing ring is arranged in the annular sealing groove to ensure the sealing of the oil inlet space and avoid oil leakage.

[0043] The first base 3 is symmetrically provided with two A-axis rotating mechanisms 1 on both sides along the first direction; the first direction is Figure 1 mid-horizontal direction;

[0044] Specifically, Figure 2 As shown, both sides of the first base 3 along the first direction are fixedly connected with connecting parts, the A-axis rotation mechanism 1 includes a second base 14, and a connecting block 15 is provided on one side of the second base 14 close to the C-axis rotation mechanism 2, the connecting block 15 is fixedly connected to the connecting part, and the connecting block 15 and the second base 14 form relative rotation;

[0045] Further, a second mounting groove is provided on the side wall of the second base 14 close to the C-axis rotating mechanism 2, and a second rotating device having a second axis 30 is provided in the second mounting groove, and one end of the second rotating device close to the C-axis rotating mechanism 2 is coaxially fixedly connected to the connecting block 15, and is used to drive the connecting block 15 to rotate around the second axis 30, thereby driving the connecting part to rotate around the second axis 30, and further causing the C-axis rotating mechanism 2 to rotate around the second axis 30; the second axis 30 is parallel to the first direction, and the second axis 30 is perpendicular to the first axis 29;

[0046] Furthermore, if Figure 5 As shown, a second annular protrusion 17 is provided on the side wall of the connecting block 15 away from the C-axis rotating mechanism 2, and its movable cover is provided at one end of the second mounting groove close to the C-axis rotating mechanism 2, and the connecting block 15 is braked by a second brake member 22;

[0047] Specifically, a mounting block 21 is fixedly provided on the side wall of the second base 14 close to the C-axis rotating mechanism 2, which is an annular structure and is located outside the connecting block 15. A second brake member 22 is fixedly provided on the circumferential inner wall of the mounting block 21, which is an elastic film structure and an annular structure. An oil inlet space is provided inside the second brake member 22, which is connected to an external oil input device. A quantitative amount of oil is input into the oil inlet space through the external oil input device, so that the second brake member 22 can be deformed, and the circumferential inner wall of the second brake member 22 can move toward the second annular protrusion 17 and engage with the circumferential outer wall of the second annular protrusion 17, so as to brake the connecting block 15, and then brake the C-axis rotating mechanism 2, so that the C-axis rotating mechanism 2 can achieve stable braking, improve the braking effect, and improve safety;

[0048] It should be noted that two annular sealing grooves are provided on the mounting block 21, which are respectively located on both sides of the oil inlet space. Annular sealing rings are provided in the annular sealing grooves to ensure the sealing of the oil inlet space and prevent oil leakage.

[0049] like Figure 2 As shown, the second rotating device includes a second rotating shaft 16 having a second axis 30. The second rotating shaft is rotatably disposed in the second mounting groove, and one end of the second rotating shaft close to the C-axis rotating mechanism 2 is coaxially fixedly connected to the connecting block 15;

[0050] Furthermore, the second rotating device also includes a second motor 18, which is arranged in the second mounting groove. The second motor 18 has a second rotor 19 and a second stator 20. The second rotor 19 is fixedly sleeved on the second rotating shaft 16, and the second stator 20 is movably sleeved on the outer wall of the second rotor 19, and the circumferential outer wall of the second stator 20 is fixedly connected to the circumferential inner wall of the second mounting groove. By starting the second motor 18, the second rotor 19 rotates to drive the second rotating shaft 16 to rotate, thereby driving the connecting block 15 to rotate around the second axis 30, and then driving the C-axis rotating mechanism 2 to rotate around the second axis 30 through the connecting part; wherein the type of the second motor 18 is, for example: a permanent magnet synchronous torque motor;

[0051] Furthermore, if Figure 5 As shown, the second rotating device also includes a third bearing 24, and a second mounting boss 23 is fixedly provided on the circumferential side wall of one end of the second rotating shaft 16 close to the connecting block 15, which is an annular structure. The third bearing 24 has a third inner ring and a third outer ring. The circumferential inner wall of the third inner ring and its two opposite side walls along the first direction are respectively fixedly connected to the circumferential outer wall of the second rotating shaft 16, the side wall of the connecting block 15 away from the connecting portion, and the side wall of the second mounting boss 23 close to the connecting block 15, and the third outer ring is fixedly connected to the circumferential inner wall of the second mounting groove;

[0052] It should be noted that an annular sealing groove is provided on the circumferential inner wall of the second mounting groove corresponding to the second mounting boss 23, and an annular sealing ring is provided in the annular sealing groove to ensure the relative rotation sealing between the second mounting boss 23 and the second mounting groove;

[0053] Furthermore, if Figure 6 As shown, the second rotating device also includes a fourth bearing 25, the fourth bearing 25 includes a fourth inner ring and a fourth outer ring, the fourth inner ring is fixedly sleeved on one end of the second rotating shaft 16 away from the connecting block 15, and the circumferential outer wall of the fourth outer ring is fixedly connected to the circumferential inner wall of the second mounting groove. By setting the fourth bearing 25, the rotation stability of the second rotating shaft 16 can be improved and the structural rigidity can be increased.

[0054] like Figure 2 As shown, the C-axis rotating mechanism 2 and the A-axis rotating mechanism 1 are both provided with motor cooling mechanisms, and cooling channels are opened in the first base 3 and the second base 14, which are connected to the cooling liquid nozzle 27. The cooling liquid nozzle 27 is connected to the external coolant, and the coolant can be input into the cooling channel to cool the first motor 8 and the second motor 18, so as to avoid the first motor 8 and the second motor 18 from overheating after working for a long time and avoid loss.

[0055] The C-axis rotating mechanism 2 and the A-axis rotating mechanism 1 are both provided with sealing mechanisms;

[0056] Specifically, Figure 3 and Figure 5 As shown, a plurality of air holes 28 are circumferentially arranged on the top of the first base 3, and a plurality of air holes 28 are circumferentially arranged on the side wall of the mounting block 21 close to the connecting block 15. The air holes 28 are connected to an external air pump, and gas is input into the air holes 28 through the external air pump. The gas ejected through the plurality of circumferential air holes 28 cooperates with each other, so that the plurality of air holes 28 on the first base 3 and the mounting block 21 eject positive pressure air to form an air curtain, which can respectively seal the gap between the workbench 4 and the first base 3 and the gap between the connecting block 15 and the mounting block 21, so as to prevent impurities from entering and affecting the rotation of the workbench 4 and the connecting block 15, thereby ensuring the stable rotation of the workbench 4 and the connecting block 15 and improving the processing accuracy.

[0057] like Figure 4 and Figure 6 As shown, the C-axis rotation mechanism 2 and the A-axis rotation mechanism 1 are both provided with a closed-loop feedback grating 26, which is arranged at the bottom end of the first rotating shaft 7 and the end of the second rotating shaft 16 away from the connecting block 15, and is used to detect the rotation speed and angular displacement of the first rotating shaft 7 and the second rotating shaft 16. Through the setting of the closed-loop feedback grating 26, it cooperates with the first brake member 6 and the second brake member 22, so as to detect the rotation angle of the first rotating shaft 7 and the second rotating shaft 16, and can brake the workbench 4 and the connecting block 15 in time, thereby improving the processing accuracy.

[0058] Working principle: By starting the first motor 8, the first rotor 9 rotates to drive the first rotating shaft 7 to rotate, so that the first rotating shaft 7 drives the workbench 4 to rotate around the first axis 29, thereby, the workpiece mounted on the workbench 4 can rotate around the first axis 29, so as to be processed;

[0059] By starting the second motor 18, the second rotor 19 rotates to drive the connecting block 15 to rotate around the second axis 30, thereby driving the C-axis rotating mechanism 2 to rotate around the second axis 30 through the connecting portion, thereby performing multi-angle processing on the workpiece;

[0060] When braking is required, a quantitative amount of oil is input into the oil inlet space of the first brake member 6 and the second brake member 22 through the external oil input device. Through the thin-walled structure of the first brake member 6 and the second brake member 22, the circumferential side wall of the first brake member 6 away from the first base 3 can abut against the circumferential inner wall of the first annular protrusion 5, and the circumferential inner wall of the second brake member 22 can abut against the circumferential outer wall of the second annular protrusion 17, so that the first annular protrusion 5 and the second annular protrusion 17 can stop rotating, thereby stopping the worktable 4 and the C-axis rotating mechanism 2 from rotating;

[0061] The annular structure of the first brake member 6 and the second brake member 22 can ensure stable braking of the workbench 4 and the C-axis rotating mechanism 2, improve stability and safety, and ensure machining accuracy.

[0062] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A cradle turntable, characterized in that: The cradle turntable comprises two symmetrically arranged A-axis rotating mechanisms (1) and a C-axis rotating mechanism (2) arranged between the two A-axis rotating mechanisms (1), wherein the A-axis rotating mechanism (1) is used to drive the C-axis rotating mechanism (2) to rotate, and the C-axis rotating mechanism (2) comprises: A first base (3), wherein a first rotating device having a first axis (29) is arranged in the first base (3), a workbench (4) is coaxially connected to the top of the first rotating device, and is used to drive the workbench (4) to rotate around the first axis (29), and a first annular protrusion (5) is fixedly arranged at the bottom of the workbench (4), and a movable cover of the first rotating device is arranged on the top of the first base (3) and forms relative rotation with the first base (3); A first brake component (6) is fixedly arranged on the circumferential side wall at the top of the first base (3), and is an elastic film structure. By inputting oil into the first brake component (6), the first brake component (6) is deformed, and the side wall of the first brake component (6) away from the first base (3) can abut against the circumferential inner wall of the first annular protrusion (5), thereby braking the workbench (4).

2. The cradle turntable according to claim 1, characterized in that: A first mounting groove is formed at the top of the first base (3); the first rotating device comprises a first rotating shaft (7) having the first axis (29); the first rotating shaft (7) is rotatably arranged in the first mounting groove, and the top of the first rotating shaft (7) extends above the first base (3) and is coaxially fixedly connected to the workbench (4); The first rotating device also includes a first motor (8) arranged in the first mounting groove, the first motor (8) having a first rotor (9) and a first stator (10), the first stator (10) being sleeved on the outer wall of the first rotor (9) on the first rotating shaft (7), and the outer wall of the first stator (10) and the inner wall of the first mounting groove being fixedly connected, so as to drive the first rotor (9) to rotate.

3. The cradle turntable according to claim 2, characterized in that: The top side wall of the first rotating shaft (7) is provided with a first mounting boss (11), the first rotating device further comprises a first bearing (12) which is provided at the top of the first mounting groove, the first bearing (12) having a first inner ring and a first outer ring, the top, bottom and inner wall of the first inner ring being respectively fixedly connected to the side wall of the workbench (4) close to the first base (3), the top of the first mounting boss (11) and the top side wall of the first rotating shaft (7), and the outer wall of the first outer ring is fixedly connected to the top inner wall of the first mounting groove; The first rotating device also includes a second bearing (13), which is sleeved on the bottom of the first rotating shaft (7) and is used to increase the rotation stability of the first rotating shaft (7), improve the load-bearing capacity, and increase the rigidity.

4. The cradle turntable according to claim 3, characterized in that: The first base (3) is provided with connecting parts on both sides along the first direction, which are used to respectively connect the two A-axis rotating mechanisms (1); the A-axis rotating mechanism (1) comprises a second base (14); a second rotating device having a second axis (30) is provided in the second base (14); the second rotating device is used to drive the C-axis rotating mechanism (2) to rotate around the second axis (30); the second axis (30) is perpendicular to the first axis (29).

5. The cradle turntable according to claim 4, characterized in that: A connecting block (15) is provided on a side of the second base (14) close to the C-axis rotating mechanism (2), the connecting block (15) and the connecting portion are fixedly connected, a second mounting groove is provided on a side wall of the second base (14) close to the C-axis rotating mechanism (2), the second rotating device comprises a second rotating shaft (16) having a second axis (30), the second rotating shaft is rotatably arranged in the second mounting groove, one end of the second rotating shaft close to the C-axis rotating mechanism (2) is coaxially fixedly connected to the connecting block (15), and a second annular protrusion (17) is fixedly provided on a side wall of the connecting block (15) away from the C-axis rotating mechanism (2), and a movable cover is arranged on one end of the second mounting groove close to the C-axis rotating mechanism (2); The second rotating device also includes a second motor (18), the second motor (18) having a second rotor (19) and a second stator (20), the second rotor (19) being fixedly sleeved on the second rotating shaft (16), the second stator (20) being sleeved on the outer wall of the second rotor (19), and the outer wall of the second stator (20) being fixedly connected to the inner wall of the second mounting groove.

6. The cradle turntable according to claim 5, characterized in that: A mounting block (21) is provided on the side wall of the second base (14) close to the C-axis rotating mechanism (2), and is located on the side of the second annular protrusion (17) away from the second mounting groove. A second braking member (22) is fixedly provided on the side wall of the mounting block (21) close to the second annular protrusion (17), and is an elastic film structure. By inputting oil into the second braking member (22), the second braking member (22) is deformed, and the side wall of the second braking member (22) close to the second annular protrusion (17) can abut against the circumferential outer wall of the second annular protrusion (17) to brake the connecting block (15).

7. The cradle turntable according to claim 6, characterized in that: A second mounting boss (23) is provided on a side wall of one end of the second rotating shaft (16) close to the connecting block (15); the second rotating device further comprises a third bearing (24); the third bearing (24) comprises a third inner ring and a third outer ring; the inner wall of the third inner ring and two opposite side walls along the first direction are respectively fixedly connected to the side wall of the second rotating shaft (16), the side wall of the connecting block (15) away from the connecting portion and the side wall of the second mounting boss (23) close to the connecting block (15); the third outer ring is fixedly connected to the inner wall of the second mounting groove; The second rotating device also includes a fourth bearing (25), which is sleeved on an end of the second rotating shaft (16) away from the connecting block (15) and is used to increase the rotation stability of the second rotating shaft (16) and increase the rigidity.

8. The cradle turntable according to claim 7, characterized in that: The C-axis rotating mechanism (2) and the A-axis rotating mechanism (1) are both provided with a motor cooling mechanism for cooling the first motor (8) and the second motor (18); The C-axis rotating mechanism (2) and the A-axis rotating mechanism (1) are both provided with closed-loop feedback gratings (26).

9. The cradle turntable according to claim 7, characterized in that: The C-axis rotating mechanism (2) and the A-axis rotating mechanism (1) are both provided with a sealing mechanism, the sealing mechanism comprising a plurality of air holes (28) circumferentially arranged on the first base (3) and the mounting block (21), the sealing mechanism also comprising an air pump for inputting air into the air holes (28), so that the plurality of air holes (28) on the first base (3) and the mounting block (21) eject positive pressure air to form an air curtain, which is used to seal the gap between the workbench (4) and the first base (3), and the gap between the connecting block (15) and the mounting block (21), to prevent impurities from entering.

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