High-precision rotary table for testing large-aperture spatial load

Abstract

The utility model discloses a high-precision rotary table for testing a large-aperture spatial load, which relates to the technical field of spatial load testing equipment and comprises a base, a driving shaft supporting assembly, a driven shaft supporting assembly and a bearing assembly, and the driving shaft supporting assembly is arranged at one end of the top surface of the base; the driven shaft supporting assembly is arranged at the other end of the top face of the base. The two ends of the bearing assembly are connected with the driving shaft supporting assembly and the driven shaft supporting assembly correspondingly. The driving shaft supporting assembly comprises a driving shaft, a direct-current torque motor is installed on a shaft shoulder of the driving shaft, the driving shaft is rotationally arranged on the top of a driving shaft supporting frame, the driving shaft supporting frame is installed on the base, and the output end of the driving shaft is connected with the bearing assembly. The rotary table is directly driven by the direct-current torque motor, intermediate transmission links such as a speed reducer are not needed, and the motion precision of the whole rotary table is relatively high; and a 26-bit high-precision encoder is adopted, and 1000-time subdivision is adopted for feeding back an angular position, so that the positioning precision of the rotary table is relatively high.

Description

TECHNICAL FIELD

[0001] The utility model relates to space load test equipment technical field especially relates to a kind of high-precision rotary table of test large aperture space load. BACKGROUND

[0002] Space optical load refers to the optical equipment carried by spacecraft, and is one of the main loads of deep space exploration spacecraft, including infrared imaging instruments, infrared spectrometers, visible light imaging instruments, visible light spectrometers, ultraviolet imaging instruments, laser range finders, laser radars, etc. For example, the world's most outstanding astronomical telescope Hubble telescope (HST) carries multiple optical loads, and China's launched "Fengyun" weather satellite, "Ocean No. 1" ocean satellite, "Chang'e No. 1" moon satellite, etc. All carry multiple space optical loads.

[0003] Before large aperture optical load is shipped, a series of tests need to be carried out, and some tests need the optical load to be turned over. Therefore, the turnover test of large aperture optical load is often difficult. The rotary table carrying large aperture optical load needs to have the characteristics of large carrying capacity, large overall size, high precision, stable speed, etc. However, the above characteristics of the rotary table on the market are difficult to consider. The pointing accuracy and speed stability of the existing large rotary table are often low, and small rotary tables are difficult to carry large aperture space loads.

[0004] Therefore, the skilled person in the art provides a high-precision rotary table for testing large aperture space load to solve the problems raised in the above background. UTILITY MODEL CONTENTS

[0005] The utility model provides a high-precision rotary table for testing large aperture space load which can carry large aperture space optical load for turnover test.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0007] The high-precision rotary table for testing large aperture space load of the utility model comprises:

[0008] The base is provided with a foot at the bottom corner.

[0009] The driving shaft support assembly is arranged at one end of the top surface of the base.

[0010] The driven shaft support assembly is arranged at the other end of the top surface of the base, and the end of the driven shaft support assembly away from the driving shaft support assembly is connected with an encoder.

[0011] The carrying assembly is connected with the driving shaft support assembly and the driven shaft support assembly at both ends.

[0012] The main shaft support assembly comprises a main shaft, a DC torque motor is installed on the shaft shoulder of the main shaft, the rotation of the main shaft is arranged on the top of a main shaft support frame, the main shaft support frame is installed on a base, and the output end of the main shaft is connected with a bearing assembly.

[0013] Further, one end of the main shaft close to the bearing assembly is connected with the main shaft support frame through a tapered roller bearing.

[0014] Further, the other end of the main shaft away from the bearing assembly is connected with the main shaft support frame through an angular contact bearing.

[0015] Further, the driven shaft support assembly comprises a driven shaft, the rotation of the driven shaft is arranged on the top of a driven shaft support frame, the driven shaft support frame is installed on the base, one end of the driven shaft is connected with the bearing assembly, and the other end of the driven shaft is connected with an encoder.

[0016] Further, the end of the driven shaft close to the bearing assembly is connected with the driven shaft support frame through a pair of angular contact bearings.

[0017] Further, the end of the driven shaft close to the encoder is connected with the driven shaft support frame through a deep groove ball bearing.

[0018] Further, the bearing assembly comprises a bearing platform, the two ends of the bearing platform are respectively provided with a main shaft side plate and a driven shaft side plate, the main shaft side plate and the driven shaft side plate are located on the same side of the bearing platform and are arranged perpendicularly to the bearing platform, the end of the main shaft side plate away from the bearing platform is connected with the main shaft, and the end of the driven shaft side plate away from the bearing platform is connected with the driven shaft.

[0019] In the above technical solution, the high-precision rotary table for testing large-diameter space load has the following beneficial effects:

[0020] 1. The DC torque motor is directly driven, and no intermediate transmission link such as a reducer is needed (the intermediate speed reduction link such as the reducer not only reduces the transmission efficiency, but also causes the motion precision to be reduced due to the transmission gap of the mechanical transmission mechanism), so that the motion precision of the rotary table is relatively high.

[0021] 2. The 26-bit high-precision encoder is adopted, and the angle position is fed back with 1000 times subdivision, so that the positioning precision of the rotary table is relatively high. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0023] Fig. 1 A front view of the high-precision rotary table for testing large-aperture space load provided by the embodiment of the present application;

[0024] Fig. 2 A top view of the high-precision rotary table for testing large-aperture space load provided by the embodiment of the present application.

[0025] Explanation of reference signs:

[0026] 10, base; 11, foot;

[0027] 20, driving shaft support assembly; 21, driving shaft; 22, direct-current torque motor; 23, driving shaft support frame; 24, conical roller bearing; 25, angular contact bearing;

[0028] 30, driven shaft support assembly; 31, driven shaft; 32, driven shaft support frame; 33, encoder; 34, pair of angular contact bearings; 35, deep groove ball bearing;

[0029] 40, bearing assembly; 41, bearing platform; 42, driving shaft side plate; 43, driven shaft side plate. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical scheme of the present application, the present application will be further described in detail with reference to the drawings.

[0031] Referring to Figs. 1-2 as shown;

[0032] The high-precision rotary table for testing large-aperture space load described in the embodiment of the present application comprises:

[0033] The base 10;

[0034] The driving shaft support assembly 20 is arranged at one end of the top surface of the base 10;

[0035] The driven shaft support assembly 30 is arranged at the other end of the top surface of the base 10;

[0036] The bearing assembly 40 is connected with the driving shaft support assembly 20 and the driven shaft support assembly 30 at both ends respectively;

[0037] The main shaft support assembly 20 comprises a main shaft 21, the shaft shoulder of the main shaft 21 is provided with a direct current torque motor 22, the main shaft 21 is rotatably arranged on the top of a main shaft support frame 23, the main shaft support frame 23 is installed on the base 10, and the output end of the main shaft 21 is connected with the bearing assembly 40.

[0038] The direct current torque motor 22 of the application is directly connected with the main shaft 21, that is, the direct current torque motor 22 directly drives the main shaft 21 to rotate, without an intermediate transmission link such as a speed reducer (the intermediate speed reduction link such as a speed reducer not only reduces transmission efficiency, but also causes the motion precision to be reduced due to the transmission gap of the mechanical transmission mechanism), so that the motion precision of the rotary table complete machine is relatively high.

[0039] Further, one end of the main shaft 21 close to the bearing assembly 40 is connected with the main shaft support frame 23 through a tapered roller bearing 24.

[0040] Further, the other end of the main shaft 21 away from the bearing assembly 40 is connected with the main shaft support frame 23 through an angular contact bearing 25.

[0041] The two ends of the main shaft 21 are respectively rotatably connected with the main shaft support frame 23 through the tapered roller bearing 24 and the angular contact bearing 25, so that the direct current torque motor 22 can drive the main shaft 21 to rotate along its own axis on the main shaft support frame 23.

[0042] Further, the driven shaft support assembly 30 comprises a driven shaft 31, the driven shaft 31 is rotatably arranged on the top of a driven shaft support frame 32, the driven shaft support frame 32 is installed on the base 10, one end of the driven shaft 31 is connected with the bearing assembly 40, and the other end of the driven shaft 31 is connected with an encoder 33.

[0043] The encoder 33 adopts a 26-bit high-precision encoder, has 1000 times subdivision for feedback angle position. When the main shaft 32 drives the driven shaft 31 to rotate through the bearing assembly 40, the position of the rotary table can be judged through the encoder 33, and the positioning precision of the rotary table can be improved.

[0044] Further, the end of the driven shaft 31 close to the bearing assembly 40 is connected with the driven shaft support frame 32 through a pair of angular contact bearings 34.

[0045] Further, the end of the driven shaft 31 close to the encoder 33 is connected with the driven shaft support frame 32 through a deep groove ball bearing 35.

[0046] The two ends of the driven shaft 31 are rotatably connected with the driven shaft support frame 32 through deep groove ball bearings 35 and angular contact bearings 34 respectively, so that the direct current torque motor 22 can drive the driving shaft 21, and then drive the driven shaft 31 to rotate along its own axis on the driven shaft support frame 32 through the bearing assembly 40.

[0047] Further, the bearing assembly 40 comprises a bearing platform 41, two ends of the bearing platform 41 are respectively provided with a driving shaft side plate 42 and a driven shaft side plate 43, the driving shaft side plate 42 and the driven shaft side plate 43 are located on the same side of the bearing platform 41 and are both arranged perpendicularly to the bearing platform 41; the end of the driving shaft side plate 42 away from the bearing platform 41 is connected with the driving shaft 21, and the end of the driven shaft side plate 43 away from the bearing platform 41 is connected with the driven shaft 31.

[0048] Further, the bottom surface of the base 10 is provided with a footing 11 at the corner.

[0049] The footing 11 is connected to the base 10 by screws and is used to support the whole rotating table.

[0050] In specific use, the main shaft support assembly 20 and the driven shaft support assembly 30 are connected to the base 10 by screws to form the whole machine frame and bear the whole machine and load. The angular contact bearing 25, the direct current torque motor 22, the tapered roller bearing 24 and the driving shaft 21 together form the driving shaft system, wherein the angular contact bearing 25 and the tapered roller bearing 24 are both transitionally fitted with the driving shaft 21 and the driving shaft support frame 23 to form the support driving shaft system and are installed by hot mounting. The direct current torque motor 22 is connected to the driving shaft 21 by screws to output motion of the whole machine. The angular contact bearing 34, the deep groove ball bearing 35, the driven shaft 31 and the encoder 33 together form the driven shaft system, wherein the angular contact bearing 34 and the deep groove ball bearing 35 are both transitionally fitted with the driven shaft 31 and the driven shaft support frame 32 to form the support driven shaft system and are also installed by hot mounting. The encoder 33 is connected to the driven shaft 31 by screws to serve as a motion feedback element and feedback the angular displacement of the rotating table. The bearing platform 41 is an optical load bearing platform and is connected to the driving shaft 21 and the driven shaft 31 by screws through the driving shaft side plate 42 and the driven shaft side plate 43. The bearing platform 41 can also serve as an intermediate bridge to transmit the motion of the driving shaft 21 to the driven shaft 31.

[0051] The present application can be applied to the testing of large-diameter optical load imaging, field of view angle, etc.

[0052] The person skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description are only for explaining the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed for protection. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision turntable for testing a large-aperture space payload, characterized in that, The utility model relates to a kind of bearing assembly and bearing assembly, including: Base (10), the bottom corner of the bottom surface of base (10) is provided with footing (11); Driving shaft support assembly (20), driving shaft support assembly (20) is arranged in the top surface of base (10) one end; Driven shaft support assembly (30), driven shaft support assembly (30) is arranged in the top surface of base (10) other end, and the end of driven shaft support assembly (30) is connected with encoder (33) away from driving shaft support assembly (20); Bearing assembly (40), two ends of bearing assembly (40) are connected with driving shaft support assembly (20) and driven shaft support assembly (30) respectively; The driving shaft support assembly (20) includes driving shaft (21), the shaft shoulder of driving shaft (21) is installed with direct-current torque motor (22), and driving shaft (21) rotation is arranged with the top of driving shaft support frame (23), and driving shaft support frame (23) is installed on base (10), and the output end of driving shaft (21) is connected with bearing assembly (40).

2. The high-precision rotary table for testing a large-aperture space payload according to claim 1, characterized in that: The end of driving shaft (21) is connected with driving shaft support frame (23) through conical roller bearing (24) close to bearing assembly (40).

3. The high-precision turntable for testing large-aperture space payloads according to claim 2, characterized in that: The end of driving shaft (21) is connected with driving shaft support frame (23) through angular contact bearing (25) away from bearing assembly (40).

4. The high-precision rotary table for testing a large-aperture space payload according to claim 1, characterized in that: The driven shaft support assembly (30) includes driven shaft (31), and the top of driven shaft support frame (32) is rotationally arranged with driven shaft (31), and driven shaft support frame (32) is installed on base (10), and one end of driven shaft (31) is connected with bearing assembly (40), and the other end of driven shaft (31) is connected with encoder (33).

5. The high-precision turntable for testing large-aperture space payloads according to claim 4, characterized in that: The end of driven shaft (31) is connected with driven shaft support frame (32) through a pair of angular contact bearings (34) close to bearing assembly (40).

6. The high-precision turntable for testing large-aperture space payloads according to claim 5, characterized in that: The end of driven shaft (31) is connected with driven shaft support frame (32) through deep groove ball bearing (35) close to encoder (33).

7. The high-precision rotary table for testing large-aperture space payloads according to claim 1, characterized in that: The bearing assembly (40) includes bearing platform (41), and the two ends of bearing platform (41) are installed with driving shaft side plate (42) and driven shaft side plate (43) respectively, and driving shaft side plate (42) and driven shaft side plate (43) are located on the same side of bearing platform (41) and are vertically arranged with bearing platform (41);The end of driving shaft side plate (42) is connected with driving shaft (21) away from bearing platform (41), and the end of driven shaft side plate (43) is connected with driven shaft (31) away from bearing platform (41).

Images