T-shaped two-dimensional turntable structure for laser communication

Abstract

The utility model relates to a T-shaped two-dimensional turntable structure for laser communication, which comprises an azimuth shaft system and a pitch shaft system which are fixedly connected, the azimuth shaft system comprises an azimuth base, an azimuth shaft and an azimuth motor, the azimuth base is used for installing the azimuth shaft, and the azimuth motor is used for driving the azimuth shaft to rotate; the pitching shaft system comprises a pitching base, a pitching shaft and a pitching motor, the pitching base and the azimuth base below the pitching base are fixed through a flange structure of a connecting surface, the motion principle of the pitching shaft system is consistent with that of the azimuth shaft system, and the two ends of the pitching shaft are used for fixing an optical load. The two-position rotary table is exquisite in structure, the two-position rotary table is light in design, and the response speed and the control precision of the rotary table can be improved.

Description

Technical Field

[0001] This utility model relates to a turntable structure, specifically a T-shaped two-dimensional turntable structure for laser communication. Background Technology

[0002] In the field of laser communication, two-dimensional turntables are widely used as coarse aiming structures to achieve the acquisition and tracking of two communication terminals. The main forms of two-dimensional turntables are T-shaped and U-shaped, but in essence, they are all integrated rotation mechanisms composed of two orthogonal axes of azimuth and pitch.

[0003] Currently, the main performance requirements for 2D turntables in the field of laser communication are accuracy, including axis accuracy and control tracking accuracy, response speed, and miniaturization and weight reduction. Existing 2D turntable designs cannot meet these requirements. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a T-shaped two-dimensional turntable structure for laser communication, which achieves high precision, fast response and miniaturization, so as to meet the requirements of the laser communication field.

[0005] According to the technical solution provided by this utility model, a T-shaped two-dimensional turntable structure for laser communication includes a fixedly connected azimuth axis system and a pitch axis system. The azimuth axis system includes an azimuth base, an azimuth axis, and an azimuth motor. An azimuth bearing is provided inside the azimuth base. The azimuth axis is sleeved in the azimuth bearing. The drive shaft of the azimuth motor is connected to the azimuth axis and is used to drive the azimuth axis to rotate. The relative positions of the azimuth bearing and the azimuth motor are fixed by an azimuth motor support ring. The azimuth bearing and the azimuth base are fixed by an azimuth pressure ring.

[0006] The pitch axis system includes a pitch base, a pitch axis, and a pitch motor. The pitch base is fixed to the azimuth base below it via a flange structure on the connecting surface. The pitch base has a horizontally extending cavity inside, and an annular platform is provided inside the cavity. Pitch bearings are respectively provided on both sides of the annular platform. The pitch axis is sleeved in the pitch bearing. The pitch bearing is fixed to the pitch base by a first pitch pressure ring. The side of the pitch bearing at one end is engaged with the pitch axis by a protrusion provided on the pitch axis. The pitch bearing at the other end is fixed to the pitch axis by a second pitch pressure ring, and a first adjusting shim is provided between the pitch bearing and the second pitch pressure ring. The drive shaft of the pitch motor is connected to the pitch axis. The pitch motor is fixed on the pitch base. The two ends of the pitch axis are used to fix optical loads.

[0007] As a further improvement of this utility model, two azimuth bearings are provided and arranged side by side in the azimuth base.

[0008] As a further improvement of this utility model, a second adjusting shim is provided between the azimuth bearing, the azimuth motor, and the azimuth pressure ring.

[0009] As a further improvement of this utility model, the azimuth motor support ring and the azimuth shaft are fixed together by fasteners.

[0010] As a further improvement of this utility model, an azimuth grating is provided on the azimuth base for sending commands to the azimuth axis and monitoring the movement of the azimuth axis.

[0011] As a further improvement of this utility model, a pitch grating is provided on the pitch base for sending commands to the pitch axis and monitoring the movement position of the pitch axis.

[0012] As a further improvement of this utility model, a third adjusting shim is provided between the two pitch bearings and the first pitch pressure ring.

[0013] As a further improvement of this utility model, both the pitch bearing and the azimuth bearing are angular contact ball bearings.

[0014] The beneficial effects of this utility model are as follows:

[0015] The DC brushless direct drive motor is adopted, and the motor stator is fixed on the base. The stator is rigidly connected to the shaft by screws, without any flexible connection mechanism or other transmission mechanism in the middle, which improves the turntable's response speed and control accuracy.

[0016] Light-load, high-precision angular contact ball bearings are used to ensure shaft system accuracy.

[0017] The bearing fixing structure is equipped with an adjustment shim. The preload of the bearing installation is adjusted by grinding the thickness of the adjustment shim to achieve an optimal value, thereby improving the accuracy of the shaft system, reducing the rotational friction of the shaft system, and improving the response speed of the entire shaft system.

[0018] The use of a high-precision angle sensor (grating) improves control accuracy;

[0019] By employing lightweight, low-density structural materials and lightweight structural features, the entire turntable is made lightweight, with a weight ratio of approximately 1:1 between the body and the load. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a cross-sectional view of the present invention.

[0022] Explanation of reference numerals in the attached drawings: 1. Azimuth base; 2. Azimuth axis; 3. Azimuth motor; 4. Azimuth bearing; 5. Azimuth motor support ring; 6. Azimuth pressure ring; 7. Second adjusting shim; 8. Azimuth grating; 9. Pitch base; 10. Pitch axis; 11. Pitch motor; 12. Ring stage; 13. Pitch bearing; 14. First pitch pressure ring; 15. Protrusion; 16. Second pitch pressure ring; 17. First adjusting shim; 18. Pitch grating; 19. Third adjusting shim; 20. Optical load. Detailed Implementation

[0023] The present invention will now be further described in conjunction with the embodiments shown in the accompanying drawings:

[0024] like Figures 1 to 2 As shown, a T-shaped two-dimensional turntable structure for laser communication includes a fixedly connected azimuth axis system and a pitch axis system. The azimuth axis system includes an azimuth base 1, an azimuth shaft 2, and an azimuth motor 3. Two azimuth bearings 4 are arranged side by side inside the azimuth base 1. The azimuth shaft 2 is sleeved inside the azimuth bearings 4. The drive shaft of the azimuth motor 3 is connected to the azimuth shaft 2 and is used to drive the azimuth shaft 2 to rotate. The relative positions of the azimuth shaft 2 and the azimuth motor 3 are fixed by an azimuth motor support ring 5. One end of the azimuth motor support ring 5 is connected to the azimuth bearing 4 located below. The azimuth bearing 4 located below is fixed to the azimuth base 1 by an azimuth pressure ring 6.

[0025] The pitch axis system includes a pitch base 9, a pitch shaft 10, and a pitch motor 11. The pitch base 9 is fixed to the azimuth base 1 below via a flange structure at the connecting surface. The pitch base 9 has a horizontally extending cavity inside, and two annular platforms 12 are arranged inside the cavity. Pitch bearings 13 are respectively arranged on the left side of one annular platform 12 and the right side of the other annular platform 12. The pitch shaft 10 is sleeved in the pitch bearings 13. The two pitch bearings 13 are respectively connected by a first pitch pressure ring 14. The pitch bearing 13 on the right side is fixed to the pitch base 9. The side of the pitch bearing 13 on the right side is engaged with the pitch shaft 10 by a protrusion 15 provided on the pitch shaft 10. The pitch bearing 13 on the left side is fixed to the pitch shaft 10 by a second pitch pressure ring 16. A first adjusting shim 17 is provided between the pitch bearing 13 and the second pitch pressure ring 16. The drive shaft of the pitch motor 11 is connected to the pitch shaft 10. The pitch motor 11 is fixed on the pitch base 9. The two ends of the pitch shaft 10 are used to fix the optical load 20.

[0026] A second adjusting pad 7 is provided between the lower azimuth bearing 4 and the azimuth motor support ring 5 and the azimuth pressure ring 6; the azimuth motor support ring 5 is fixed to the azimuth axis 2 by fasteners; an azimuth grating 8 is provided on the azimuth base 1 for sending commands to the azimuth axis 2 and monitoring the movement azimuth of the azimuth axis 2.

[0027] A pitch grating 18 is provided on the pitch base 9 for sending commands to the pitch axis 10 and monitoring the movement position of the pitch axis 10; a third adjusting shim 19 is provided between the two pitch bearings 13 and the first pitch pressure ring 14; both the pitch bearings 13 and the azimuth bearing 4 are angular contact ball bearings to ensure the accuracy of the shaft system; the pitch motor 11 is a brushless direct drive motor, with one end of its stator fixed on the pitch base and the other end connected to the pitch axis 10 by fasteners.

[0028] The pitch and azimuth axis components are made of titanium alloy, while other components such as the pitch and azimuth base are mainly made of 7075 aluminum alloy, achieving a low-density and lightweight design.

[0029] The installation sequence of this utility model is as follows: Place two azimuth bearings 4 side by side on the mounting plate at the top of the azimuth base 1; fix one end of the lower azimuth bearing 4 with the azimuth pressure ring 6; fit the azimuth shaft 2 onto the azimuth bearing 4; and clamp the azimuth motor support ring 5 onto the other end of the lower azimuth bearing 4. A second adjusting shim 7 is provided between the azimuth bearing 4 and both the azimuth pressure ring 6 and the azimuth motor support ring 5. Install the azimuth motor 3 and connect it to the azimuth motor support ring 5. Install the azimuth grating 8 and fix it to the azimuth shaft 2. Fix the pitch base 9 to the azimuth base 1 with screws. Install pitch bearings 13 on both sides of the annular platform 12 inside the pitch base 9. Two pitch bearings 13 are fixed to the pitch base 9 with the first pitch retaining ring 14, and a third adjusting shim 19 is provided between them and the second pitch retaining ring 16. The pitch shaft 10 is installed in the pitch bearing 13 from the right side, and the protrusion 15 of the pitch shaft 10 is locked on the right pitch bearing 13. The pitch motor 11 is installed on the right side and fixed to the pitch shaft 10 and the pitch base 9 with screws. The second pitch retaining ring 16 and the first adjusting shim 17 are installed on the left pitch bearing 13 and fixed to the pitch shaft 10. The pitch grating 18 is installed on the second pitch retaining ring 16. Finally, the optical load 20 is installed on the pitch shaft 10.

Claims

1. A T-shaped two-dimensional turntable structure for laser communication, comprising a fixedly connected azimuth axis system and a pitch axis system, characterized in that: The azimuth axis system includes an azimuth base (1), an azimuth shaft (2), and an azimuth motor (3). Two azimuth bearings (4) are arranged side by side inside the azimuth base (1). The azimuth shaft (2) is sleeved inside the azimuth bearings (4). The drive shaft of the azimuth motor (3) is connected to the azimuth shaft (2) and is used to drive the azimuth shaft (2) to rotate. The relative positions of the azimuth shaft (2) and the azimuth motor (3) are fixed by an azimuth motor support ring (5). One end of the azimuth motor support ring (5) is connected to the azimuth bearing (4) located below. The azimuth bearing (4) located below is fixed to the azimuth base (1) by an azimuth pressure ring (6). The pitch axis system includes a pitch base (9), a pitch shaft (10), and a pitch motor (11). The pitch base (9) is fixed to the azimuth base (1) below it by a flange structure of the connecting surface. The pitch base (9) has a horizontally extending cavity inside. The cavity has two annular platforms (12). Pitch bearings (13) are respectively provided on the left side of one annular platform (12) and the right side of the other annular platform (12). The pitch shaft (10) is sleeved in the pitch bearings (13). The two pitch bearings (13) are respectively connected to the azimuth base (11) by a first pitch pressure ring (14). The pitch base (9) is fixed. The side of the right pitch bearing (13) is engaged with the pitch shaft (10) by a protrusion (15) on the pitch shaft (10). The left pitch bearing (13) is fixed to the pitch shaft (10) by a second pitch pressure ring (16), and a first adjusting shim (17) is provided between it and the second pitch pressure ring (16). The drive shaft of the pitch motor (11) is connected to the pitch shaft (10). The pitch motor (11) is fixed on the pitch base (9). The two ends of the pitch shaft (10) are used to fix the optical load (20).

2. The T-shaped two-dimensional turntable structure for laser communication as described in claim 1, characterized in that, A second adjusting shim (7) is provided between the lower azimuth bearing (4) and the azimuth motor support ring (5) and azimuth pressure ring (6).

3. The T-shaped two-dimensional turntable structure for laser communication as described in claim 1, characterized in that, The azimuth motor support ring (5) is fixed to the azimuth shaft (2) by fasteners.

4. The T-shaped two-dimensional turntable structure for laser communication as described in claim 1, characterized in that, An azimuth grating (8) is provided on the azimuth base (1) for sending commands to the azimuth axis (2) and monitoring the movement of the azimuth axis (2).

5. The T-shaped two-dimensional turntable structure for laser communication as described in claim 1, characterized in that, The pitch base (9) is provided with a pitch grating (18) for sending commands to the pitch axis (10) and monitoring the movement orientation of the pitch axis (10).

6. The T-shaped two-dimensional turntable structure for laser communication as described in claim 1, characterized in that, A third adjusting shim (19) is provided between the two pitch bearings (13) and the first pitch pressure ring (14).

7. The T-shaped two-dimensional turntable structure for laser communication as described in claim 1, characterized in that, Both the pitch bearing (13) and the azimuth bearing (4) are angular contact ball bearings.

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