Medium-sized two-degree-of-freedom high-precision rotary table

Abstract

The utility model provides a medium-sized two-degree-of-freedom high-precision rotary table which is unique in design and comprises a base and an orientation and pitching rotation driving device. The pitching rotation driving device ensures that the carrier stably rotates around the X axis, and friction and vibration are reduced through a pitching bearing, an inner pressing ring and an outer pressing ring. The azimuth rotation driving device adopts a double-bearing structure, namely an azimuth large bearing and an azimuth small bearing, which are arranged on an azimuth shaft, so that the rotation precision and stability of the turntable are obviously improved. The double-bearing design not only disperses the load pressure, but also reduces the load of a single bearing through additional support, and ensures that the equipment stably operates under high load and external overturning force. According to the design, the bearing capacity of the rotary table is improved, the service life of equipment is prolonged, and reliable guarantee is provided for various applications needing high-precision rotation.

Description

Technical Field

[0001] The present application relates to the field of high-precision turntables, and in particular to a medium-sized two-degree-of-freedom high-precision turntable. Background Art

[0002] With the continuous development of modern science and technology, the demand for high-precision turntables is growing, especially in the fields of aerospace, national defense monitoring and precision measurement. As a key device, high-precision turntables are widely used in various occasions that require high-precision rotation and positioning, such as satellite tracking, photoelectric theodolites, radar antennas, and calibration and testing of precision optical instruments.

[0003] In the traditional design of precision optoelectronic turntables, the azimuth axis is usually a vertical axis used for support and rotation, and a single bearing structure is often used. However, the single bearing structure has certain limitations when facing large external overturning forces or loads, which may affect the accuracy and stability of the turntable. Utility Model Content

[0004] The purpose of this application is to provide a medium-sized two-degree-of-freedom high-precision turntable that can improve the stability and load-bearing capacity of the azimuth axis while optimizing the motion accuracy and long-term reliability of the turntable. This improvement not only enhances the performance of the turntable under various working conditions, but also provides greater adaptability to complex tasks and environments.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A medium-sized two-degree-of-freedom high-precision turntable comprises a base, an azimuth rotation drive device, a pitch rotation drive device, a rotation support frame and a carrier; wherein:

[0007] The carrier is mounted on the pitch and rotation driving device and is used to mount a camera;

[0008] The pitch rotation driving device is installed on the rotating support frame, and is used to drive the carrier to rotate around the X-axis direction;

[0009] The rotating support frame is mounted on the azimuth rotation driving device, and the azimuth rotation driving device is used to drive the carrier to rotate around the Z-axis direction;

[0010] The azimuth rotation drive device is installed on the base;

[0011] The pitch rotation drive device comprises a pitch shaft, a pitch bearing, a pitch inner pressure ring, a pitch outer pressure ring and a torque motor, the pitch shaft is supported by the pitch bearing, the pitch inner pressure ring and the pitch outer pressure ring, the pitch bearing is mounted on a rotating support frame, and the torque motor is used to drive the pitch shaft to perform rotational motion;

[0012] The azimuth rotation drive device comprises an azimuth shaft, a large azimuth bearing, a small azimuth bearing, an inner pressure ring of the small azimuth bearing and an outer pressure ring of the small azimuth bearing. The azimuth shaft is mounted on the base through the large azimuth bearing and the small azimuth bearing, the large azimuth bearing is mounted on the base through the outer pressure ring of the large azimuth bearing, and the small azimuth bearing is mounted on the base through the inner pressure ring of the small azimuth bearing and the outer pressure ring of the small azimuth bearing, so as to ensure the stable horizontal rotation of the azimuth shaft.

[0013] The large azimuth bearing and the small azimuth bearing are located on the upper part of the azimuth shaft for bearing the main radial load and inertia force. The small azimuth bearing is located below the large azimuth bearing and is close to the large azimuth bearing to provide additional support for the azimuth shaft.

[0014] Furthermore, a power module is provided in the base, and the power module is installed in the base through a support plate.

[0015] Furthermore, a conductive slip ring is arranged in the azimuth axis, a support member is arranged at the lower part of the azimuth axis, a frame plate is installed at the lower end of the support member, and the conductive slip ring is installed on the frame plate through a fixing block.

[0016] Furthermore, it also includes a pitch limit device, which includes a first pitch limit block, a second pitch limit block, a pitch locking bolt, a mounting seat and a pitch limit seat, the first pitch limit block and the second pitch limit block are arranged on the rotating support frame, the pitch locking bolt is installed on one side of the rotating support frame through the mounting seat, and a pitch limit seat is arranged on the lower side of the carrier, and the pitch locking bolt cooperates with the pitch limit seat to lock the carrier.

[0017] Furthermore, an orientation limiting seat and an orientation locking bolt are arranged on the upper portion of the base, and the orientation locking bolt cooperates with the orientation limiting seat to lock the carrier in orientation.

[0018] Furthermore, a PCB board is arranged on the carrier, and the PCB board is installed in the carrier through a mounting bracket.

[0019] Furthermore, an infrared camera is arranged in the carrier, an infrared camera window glass frame is arranged near the lens end of the infrared camera, and an infrared window glass is installed in the infrared camera window glass frame via an infrared window pressure ring.

[0020] Furthermore, a window glass heating assembly is provided on one side of the infrared camera.

[0021] Furthermore, a high-speed camera is arranged in the carrier, a high-speed camera window glass frame is arranged near the lens end of the high-speed camera, and a high-speed window glass is installed in the high-speed camera window glass frame via a high-speed window pressure ring.

[0022] Furthermore, a window glass heating assembly is provided on one side of the high-speed camera.

[0023] The beneficial effects of this application are:

[0024] (1) The present application arranges a large azimuth bearing and a small azimuth bearing on the upper part of the azimuth axis. The dual-bearing structure can effectively reduce the offset and shaking generated during the rotation process, thereby significantly improving the accuracy and stability of the rotation. The traditional single bearing structure is prone to offset under high load or external overturning force, resulting in reduced accuracy. The design of the present application solves this problem through dual bearing support.

[0025] (2) The large azimuth bearing and the small azimuth bearing of the present application bear the main radial load and inertia force respectively, effectively dispersing the load pressure and improving the overall load-bearing capacity and stability of the turntable. The single bearing structure in the prior art is prone to deformation or failure when facing high loads, while the present application evenly disperses the load through a dual-bearing structure, thereby improving the load-bearing capacity and equipment life.

[0026] (3) The small azimuth bearing of the present application is located below and close to the large azimuth bearing, providing additional support, so that the load can be better distributed between the bearings, reducing the load pressure of a single bearing, and ensuring that the equipment can still operate stably under high loads and large external overturning forces. The single bearing structure often causes early failure of the bearing due to uneven load distribution, but the dual bearing structure of the present application avoids this problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A cross-sectional view of a medium-sized two-degree-of-freedom high-precision turntable provided in one embodiment of the present application;

[0028] Figure 2 A cross-sectional view from another perspective of a medium-sized two-degree-of-freedom high-precision turntable provided in one embodiment of the present application;

[0029] Figure 3 A side view of a medium-sized two-degree-of-freedom high-precision turntable provided in one embodiment of the present application;

[0030] Figure 4 A cross-sectional view from another perspective of a medium-sized two-degree-of-freedom high-precision turntable provided in one embodiment of the present application;

[0031] Description of reference numerals:

[0032] 1. Base; 2. Azimuth rotation drive device; 3. Pitch rotation drive device; 4. Rotation support frame; 5. Carrier; 6. Power module; 7. Support plate; 8. Pitch limit device; 9. Window glass heating assembly;

[0033] 31. Pitch shaft; 32. Pitch bearing; 33. Pitch inner pressure ring; 34. Pitch outer pressure ring; 35. Torque motor;

[0034] 21. Azimuth axis; 22. Azimuth large bearing; 23. Azimuth small bearing; 24. Azimuth small bearing inner pressure ring; 25. Azimuth small bearing outer pressure ring; 26. Azimuth drive motor; 27. Conductive slip ring; 28. Azimuth limit seat; 29. ​​Azimuth locking bolt;

[0035] 81. First pitch limit block; 82. Second pitch limit block; 83. Pitch locking bolt; 84. Mounting seat; 85. Pitch limit seat;

[0036] 51. PCB board; 52. Infrared camera; 53. Infrared camera window glass frame; 54. Infrared window glass; 55. High-speed camera; 56. High-speed camera window glass frame; 57. High-speed window pressure ring; 58. High-speed window glass; DETAILED DESCRIPTION

[0037] The terms used in the implementation method part of this application are only used to explain the specific embodiments of this application, and are not intended to limit this application. The implementation method of the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0038] like Figures 1 to 4 As shown, a medium-sized two-degree-of-freedom high-precision turntable includes a base 1, an azimuth rotation drive device 2, a pitch rotation drive device 3, a rotation support frame 4 and a carrier 5; wherein,

[0039] The carrier 5 is mounted on the pitch and rotation driving device 3 and is used to mount a camera;

[0040] The pitch rotation driving device 3 is installed on the rotating support frame 4, and is used to drive the carrier 5 to rotate around the X-axis direction;

[0041] The rotating support frame 4 is mounted on the azimuth rotation driving device 2, and the azimuth rotation driving device 2 is used to drive the carrier 5 to rotate around the Z-axis direction;

[0042] The azimuth rotation driving device 2 is installed on the base 1;

[0043] like Figure 4As shown, the pitch rotation drive device 3 includes a pitch shaft 31, a pitch bearing 32, a pitch inner pressure ring 33, a pitch outer pressure ring 34 and a torque motor 35. The pitch shaft 31 is supported by the pitch bearing 32, the pitch inner pressure ring 33 and the pitch outer pressure ring 34. The pitch bearing 32 is mounted on the rotating support frame 4. The torque motor 35 is used to drive the pitch shaft 31 to rotate. The design of the pitch bearing 32 combined with the pitch inner pressure ring 33 and the pitch outer pressure ring 34 can ensure the smooth rotation of the pitch shaft 31. This design helps to reduce friction and vibration during the rotation process, thereby improving the rotation accuracy and stability of the turntable.

[0044] like Figure 1 As shown, the azimuth rotation drive device 2 includes an azimuth shaft 21, an azimuth large bearing 22, an azimuth small bearing 23, an azimuth small bearing inner pressure ring 24, an azimuth small bearing outer pressure ring 25 and an azimuth drive motor 26. The azimuth shaft 21 is mounted on the base 1 through the azimuth large bearing 22 and the azimuth small bearing 23, the azimuth large bearing 22 is mounted on the base 1 through the azimuth large bearing 22 outer pressure ring, the azimuth small bearing 23 is mounted on the base 1 through the azimuth small bearing inner pressure ring 24 and the azimuth small bearing outer pressure ring 25, and the azimuth drive motor 26 is used to drive the azimuth shaft 21 to rotate to ensure the stable horizontal rotation of the azimuth shaft 21; the use of the azimuth large bearing 22 outer pressure ring and the azimuth small bearing 23 inner and outer pressure rings enhances the connection stability between the bearing and the base 1. This design not only improves the rigidity of the entire drive device, but also reduces the looseness and displacement caused by vibration or impact, ensuring the long-term stable operation of the turntable.

[0045] The large azimuth bearing 22 and the small azimuth bearing 23 are located on the upper part of the azimuth axis 21 to bear the main radial load and inertial force. The small azimuth bearing 23 is located below the large azimuth bearing 22, and the small azimuth bearing 23 is close to the large azimuth bearing 22 to provide additional support for the azimuth axis 21. The present application adopts a dual-bearing structure design on the upper part of the azimuth axis 21, that is, a combination of the large azimuth bearing 22 and the small azimuth bearing 23, which effectively solves the problem of displacement and shaking that is easy to occur in the traditional single bearing structure under high load or external overturning force, and significantly improves the rotation accuracy and stability of the turntable. The dual-bearing structure not only disperses the load pressure and improves the overall load-bearing capacity and stability of the turntable, but also reduces the load pressure of the single bearing through additional support, ensuring the stable operation of the equipment under high load and large external overturning force, thereby improving the life and reliability of the equipment.

[0046] like Figure 1 As shown, in this embodiment, a power module 6 is disposed in the base 1 , and the power module 6 is installed in the base 1 through a support plate 7 .

[0047] like Figure 1As shown, in this embodiment, a conductive slip ring 27 is disposed in the azimuth shaft 21, a support member is disposed at the lower portion of the azimuth shaft 21, a frame plate is mounted at the lower end of the support member, and the conductive slip ring 27 is mounted on the frame plate through a fixing block.

[0048] Specifically, the conductive slip ring 27, as a component providing a sliding connection, can stably transmit analog or digital signals and power when the azimuth axis 21 rotates. This ensures the continuity and stability of signal and power transmission during the rotation of the turntable, and avoids the problem of cable entanglement or breakage caused by rotation.

[0049] By installing the conductive slip ring 27 inside the azimuth shaft 21 and connecting it to the frame plate through a fixing block, the entire design is more compact, saving space and improving the integration of the system. This is conducive to the miniaturization and lightweight design of the turntable and adapts to more application scenarios.

[0050] like Figure 2 and Figure 3 As shown, the present embodiment further includes a pitch limit device 8, which includes a first pitch limit block 81, a second pitch limit block 82, a pitch locking bolt 83, a mounting seat 84 and a pitch limit seat 85. The first pitch limit block 81 and the second pitch limit block 82 are arranged on the rotating support frame 4, the pitch locking bolt 83 is installed on one side of the rotating support frame 4 through the mounting seat 84, and the pitch limit seat 85 is arranged on the lower side of the carrier 5. The pitch locking bolt 83 cooperates with the pitch limit seat 85 to lock the carrier 5.

[0051] By providing the first pitch limit block 81 and the second pitch limit block 82, the pitch rotation range of the carrier 5 can be clearly limited to avoid equipment damage or personal injury caused by the carrier 5 exceeding the safe angle range. This limit function ensures the safety of the turntable operation.

[0052] When the carrier 5 reaches the maximum pitch angle, the pitch limiting device 8 locks the carrier 5 through the cooperation of the pitch locking bolt 83 and the pitch limiting seat 85. This locking function can prevent the carrier 5 from accidentally moving when the pitch motion is not required, thereby enhancing the stability of the turntable.

[0053] like Figures 1 to 4 As shown, in this embodiment, an orientation limiting seat 28 and an orientation locking bolt 29 are provided on the upper portion of the base 1 , and the orientation locking bolt 29 cooperates with the orientation limiting seat 28 to lock the carrier 5 in orientation.

[0054] The azimuth locking bolt 29 cooperates with the azimuth limiting seat 28 to lock the carrier 5 in position, preventing it from accidentally moving when no rotation or adjustment is required. This ensures the safety of the turntable operation and avoids possible equipment damage or personal injury caused by accidental movement.

[0055] The orientation locking function can prevent the carrier 5 from exceeding the safety range due to misoperation during transportation, installation or commissioning, thereby avoiding damage to the equipment due to excessive rotation or collision.

[0056] like Figure 1 As shown, in this embodiment, a PCB board 51 is disposed on the carrier 5 , and the PCB board 51 is installed in the carrier 5 through a mounting bracket.

[0057] like Figure 4 As shown, in this embodiment, an infrared camera 52 is disposed in the carrier 5, an infrared camera window glass frame 53 is disposed near the lens end of the infrared camera 52, and an infrared window glass 54 is installed in the infrared camera window glass frame 53 through an infrared window pressure ring.

[0058] The infrared camera window glass frame 53 not only supports and protects the infrared window glass 54, but also ensures the stability and sealing of the window glass through the infrared window pressure ring.

[0059] This design prevents interference of external factors such as dust and water vapor on the infrared camera 52 , thereby ensuring the long-term stable operation of the infrared camera 52 .

[0060] like Figure 4 As shown, in this embodiment, a window glass heating assembly 9 is provided on one side of the infrared camera 52 .

[0061] In a low temperature environment, the window glass heating assembly 9 can prevent the infrared window glass 54 from being frozen or frosted due to the low temperature, thereby ensuring the normal operation of the infrared camera 52 in a harsh environment.

[0062] The design of the heating component can also quickly evaporate the condensed water caused by temperature difference, avoiding the impact of condensed water on imaging quality.

[0063] like Figure 4 As shown, in this embodiment, a high-speed camera 55 is disposed in the carrier 5, and a high-speed camera window glass frame 56 is disposed near the lens end of the high-speed camera 55, and a high-speed window glass 58 is installed in the high-speed camera window glass frame 56 through a high-speed window pressing ring 57. The high-speed camera window glass frame 56 and the high-speed window glass 58 provide protection for the lens of the high-speed camera 55, preventing foreign objects such as dust, water droplets, and debris from directly contacting the lens, thereby keeping the lens clean and intact, and ensuring the quality of the captured image.

[0064] like Figure 4As shown, in this embodiment, a window glass heating assembly 9 is provided on one side of the high-speed camera 55. In a low temperature environment, the window glass of the high-speed camera 55 may produce condensation or ice due to the temperature difference. The window glass heating assembly 9 can effectively prevent this from happening, ensuring the normal operation of the high-speed camera 55 in a low temperature environment.

[0065] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0066] In the embodiments of the present application, the devices or elements referred to or implied must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise precisely and specifically specified.

[0067] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein, for example, can be implemented in an order other than those illustrated or described herein. In addition, the terms "may include" and "have" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or inherent to these processes, methods, products or devices.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present application, rather than to limit them. Although the embodiments of the present application are described in detail with reference to the above embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A medium-sized two-degree-of-freedom high-precision turntable, characterized by: It includes a base, an azimuth rotation drive device, a pitch rotation drive device, a rotation support frame and a carrier; wherein, The carrier is mounted on the pitch and rotation driving device and is used to mount a camera; The pitch rotation driving device is installed on the rotating support frame, and is used to drive the carrier to rotate around the X-axis direction; The rotating support frame is mounted on the azimuth rotation driving device, and the azimuth rotation driving device is used to drive the carrier to rotate around the Z-axis direction; The azimuth rotation drive device is installed on the base; The pitch rotation drive device comprises a pitch shaft, a pitch bearing, a pitch inner pressure ring, a pitch outer pressure ring and a torque motor, the pitch shaft is supported by the pitch bearing, the pitch inner pressure ring and the pitch outer pressure ring, the pitch bearing is mounted on a rotating support frame, and the torque motor is used to drive the pitch shaft to perform rotational motion; The azimuth rotation drive device comprises an azimuth shaft, a large azimuth bearing, a small azimuth bearing, an inner pressure ring of the small azimuth bearing and an outer pressure ring of the small azimuth bearing. The azimuth shaft is mounted on the base through the large azimuth bearing and the small azimuth bearing, the large azimuth bearing is mounted on the base through the outer pressure ring of the large azimuth bearing, and the small azimuth bearing is mounted on the base through the inner pressure ring of the small azimuth bearing and the outer pressure ring of the small azimuth bearing, so as to ensure the stable horizontal rotation of the azimuth shaft. The large azimuth bearing and the small azimuth bearing are located on the upper part of the azimuth shaft for bearing the main radial load and inertia force. The small azimuth bearing is located below the large azimuth bearing and is close to the large azimuth bearing to provide additional support for the azimuth shaft.

2. A medium-sized two-degree-of-freedom high-precision turntable according to claim 1, characterized in that: A power module is arranged in the base, and the power module is installed in the base through a supporting plate.

3. A medium-sized two-degree-of-freedom high-precision turntable according to claim 1, characterized in that: A conductive slip ring is arranged in the azimuth shaft, a support member is arranged at the lower part of the azimuth shaft, a frame plate is installed at the lower end of the support member, and the conductive slip ring is installed on the frame plate through a fixing block.

4. A medium-sized two-degree-of-freedom high-precision turntable according to claim 1, characterized in that: It also includes a pitch limit device, which includes a first pitch limit block, a second pitch limit block, a pitch locking bolt, a mounting seat and a pitch limit seat. The first pitch limit block and the second pitch limit block are arranged on the rotating support frame, and the pitch locking bolt is installed on one side of the rotating support frame through the mounting seat. The lower side of the carrier is provided with a pitch limit seat, and the pitch locking bolt cooperates with the pitch limit seat to lock the carrier.

5. The medium-sized two-degree-of-freedom high-precision turntable according to claim 1, characterized in that: An orientation limiting seat and an orientation locking bolt are arranged on the upper part of the base, and the orientation locking bolt cooperates with the orientation limiting seat to lock the carrier in orientation.

6. A medium-sized two-degree-of-freedom high-precision turntable according to claim 1, characterized in that: A PCB board is arranged on the carrier, and the PCB board is installed in the carrier through a mounting bracket.

7. The medium-sized two-degree-of-freedom high-precision turntable according to claim 1, characterized in that: An infrared camera is arranged in the carrier, and an infrared camera window glass frame is arranged near the lens end of the infrared camera. Infrared window glass is installed in the infrared camera window glass frame through an infrared window pressure ring.

8. A medium-sized two-degree-of-freedom high-precision turntable according to claim 7, characterized in that: A window glass heating assembly is arranged on one side of the infrared camera.

9. The medium-sized two-degree-of-freedom high-precision turntable according to claim 1, characterized in that: A high-speed camera is arranged in the carrier, a high-speed camera window glass frame is arranged near the lens end of the high-speed camera, and a high-speed window glass is installed in the high-speed camera window glass frame via a high-speed window pressure ring.

10. A medium-sized two-degree-of-freedom high-precision turntable according to claim 9, characterized in that: A window glass heating assembly is arranged on one side of the high-speed camera.

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