A swing wire beam sail drive mechanism

Abstract

The present application relates to the field of aerospace technology, and particularly relates to a swing wire harness type sailboard driving mechanism. The present application provides a swing wire harness type sailboard driving mechanism, which comprises an A-axis driving assembly, a double-axis connecting support, a B-axis driving assembly and a sailboard connecting support, the A-axis driving assembly is connected with a star body through a main shell, one end of the double-axis connecting support is fixedly connected with an output end of the A-axis driving assembly, the other end of the double-axis connecting support is fixedly connected with the B-axis driving assembly, one end of the sailboard connecting support is fixedly connected with an output end of the B-axis driving assembly, the other end of the sailboard connecting support is connected with a solar sailboard, and the output end rotating shaft of the A-axis driving assembly and the output end rotating shaft of the B-axis driving assembly are perpendicular; a swing wire harness is connected with a low-speed transmission shaft in the A-axis driving assembly to transmit signals and power. The present application provides a swing wire harness type two-degree-of-freedom sailboard driving mechanism with high integration, low cost and batch production.

Description

Technical Field

[0001] This invention relates to the field of aerospace technology, and in particular to a swing harness type sail drive mechanism. Background Technology

[0002] Nodal satellites in the Remote Sensing 43 constellation, such as ElectroSatellite and SAR Satellite, have long-term mission requirements for simultaneously pointing to both the Earth and the Sun. Since they operate in non-sunsynchronous orbits, whole-satellite attitude maneuvering for solar orientation or single-degree-of-freedom solar array drive systems cannot meet energy balance requirements. Therefore, a two-degree-of-freedom solar array drive system (BSADA) is needed to maximize solar energy acquisition. With nearly 200 ElectroSatellite and SAR Satellites and a large number of satellites, the application volume is significant, requiring BSADA to have a strong low-cost advantage and mass production capability.

[0003] Existing structural design technologies for two-degree-of-freedom solar panel drive mechanisms typically employ conductive slip rings for power / signal transmission, which are costly, have long manufacturing cycles, and complex assembly and adjustment processes, hindering mass production. Therefore, to address these shortcomings, a highly integrated, low-cost, and mass-producible oscillating harness-type two-degree-of-freedom solar panel drive mechanism is needed. Summary of the Invention

[0004] In view of one or more technical problems of the prior art, the present invention provides a highly integrated, low-cost, mass-producible oscillating harness type two-degree-of-freedom sail drive mechanism.

[0005] This invention provides a swing harness type solar panel drive mechanism, including an A-axis drive assembly, a dual-axis connecting bracket, a B-axis drive assembly, and a solar panel connecting bracket. The A-axis drive assembly is connected to a celestial body through a main housing. One end of the dual-axis connecting bracket is fixedly connected to the output end of the A-axis drive assembly, and the other end of the dual-axis connecting bracket is fixedly connected to the B-axis drive assembly. One end of the solar panel connecting bracket is fixedly connected to the output end of the B-axis drive assembly, and the other end of the solar panel connecting bracket is connected to a solar panel. The rotation axis of the output end of the A-axis drive assembly and the rotation axis of the output end of the B-axis drive assembly are perpendicular. The low-speed drive shaft within the A-axis drive assembly is connected to a oscillating harness for signal and power transmission.

[0006] Optionally, the A-axis drive assembly includes a main housing, an A-axis drive motor, an A-axis harmonic gear reducer, an A-axis low-speed output shaft, and an A-axis oscillating harness; The A-axis harmonic gear reducer includes an A-axis harmonic gear reducer camshaft and an A-axis harmonic gear reducer flexure. The A-axis motor rotor output end of the A-axis drive motor is fixedly connected to the A-axis harmonic gear reducer camshaft so that the A-axis drive motor drives the A-axis harmonic gear reducer to rotate. The A-axis harmonic gear reducer flexure is fixedly connected to the A-axis low-speed output shaft. The A-axis low-speed output shaft has a swing wire harness inside its shaft hole for power and signal transmission.

[0007] Optionally, the A-axis drive assembly also includes an A-axis Hall sensor, with a Hall sensor for zero-position indication externally connected to the Hall mounting side of the A-axis low-speed output shaft.

[0008] Optionally, the A-axis drive assembly also includes an A-axis rear housing, an A-axis Hall baffle, and an A-axis rear cover. The rear housing in the A-axis drive assembly is connected to the Hall baffle to prevent the swing harness from contacting the Hall sensor and to protect the Hall sensor. The A-axis rear cover has a space reserved in the A-axis axial direction for the swing harness to swing ±175° to release stress.

[0009] Optionally, the portion of the oscillating harness passing through the low-speed drive shaft hole of the A-axis is wrapped with multiple layers of heat-shrinkable fabric, and the portion of the oscillating harness exiting the low-speed drive shaft hole of the A-axis and entering the rear cover is wrapped with multiple layers of heat-shrinkable fabric.

[0010] Optionally, the 14 leads of the A-axis drive motor and Hall sensor in the A-axis drive assembly are fixed on the inner wall of the A-axis rear cover, and the remaining swing wire harness is wrapped with a polyimide insulating sleeve to protect the wire harness.

[0011] Optionally, the oscillating harness runs from the flange end of the low-speed drive shaft in the A-axis drive assembly, passes through the wire hole of the dual-axis connecting bracket, and is fixed to the solar panel connecting bracket with a wire clamp, and docks with the solar panel. The oscillating harness also runs from the wire hole of the rear cover of the A-axis drive assembly, is fixed to the rear cover with a wire clamp, and docks with the entire satellite.

[0012] Optionally, the oscillating harness is located inside the A-axis rear cover, and first disperses and then converges along the axial direction, forming a lantern shape.

[0013] Optionally, the B-axis drive assembly includes a B-axis housing, a B-axis drive motor, a B-axis harmonic gear reducer, a B-axis low-speed flange shaft, and a B-axis potentiometer angle measuring assembly. The B-axis motor rotor of the B-axis drive motor is connected to the wave generator of the B-axis harmonic gear reducer. The flexible wheel of the B-axis harmonic gear reducer is connected to the low-speed flange shaft. The B-axis low-speed flange shaft is fixedly connected to the sailboard connecting bracket to drive the sailboard connecting bracket to rotate. The B-axis low-speed flange shaft passes through the potentiometer angle measuring assembly, which is composed of two mutually redundant multi-turn continuously rotating potentiometers installed in parallel to realize angle indication of the B-axis drive assembly.

[0014] Optionally, all components are lubricated with grease.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: This invention uses a swing harness instead of a conductive slip ring for power signal transmission, which greatly shortens the processing and assembly time of the power signal transmission module and significantly reduces costs. The entire swing harness can achieve an ultra-long accelerated life test of 95,000 cycles in a vacuum environment, -40℃ to +90℃, and ±175°, enabling the swing harness solar panel drive mechanism of this invention to adapt to the multi-physics coupled space environment of low temperature, vacuum, and irradiation, meet the requirements of space service, and is suitable for low-cost mass production of constellations and commercial aerospace fields. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an assembly rendering of the present invention; Figure 2 This is a structural diagram of the A-axis drive assembly of the present invention; Figure 3 This is a structural diagram of the B-axis drive assembly of the present invention; Figure 4 This is the wiring diagram of the swing harness of the present invention; Figure 5 This is a diagram showing the installation location of the present invention.

[0018] In the diagram: 1. A-axis drive assembly; 11. Main housing; 111. Star mounting surface; 12. Motor; 121. A-axis motor rotor; 13. A-axis harmonic gear reducer; 131. A-axis harmonic gear reducer camshaft; 132. A-axis harmonic gear reducer flexspline; 14. A-axis low-speed drive shaft; 141. Low-speed output shaft flange side; 142. Low-speed output shaft Hall mounting side; 15. Oscillating wiring harness; 16. Hall sensor; 17. A 18. Rear housing of shaft; 19. Hall effect baffle; 2. A-axis rear cover; 3. Dual-axis connecting bracket; 4. B-axis drive assembly; 5. B-axis motor; 6. B-axis motor rotor; 7. B-axis harmonic gear reducer; 8. B-axis harmonic gear reducer wave generator; 9. B-axis harmonic gear reducer flexible wheel; 10. B-axis low-speed flange shaft; 11. Potentiometer angle measuring assembly; 2. B-axis housing; 32. Sailboard connecting bracket; 43. Sailboard mounting surface. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] In the description of the embodiments of the present invention, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple sets" refers to two or more sets; the terms "connection," "fixed," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0021] In this specification, it should be understood that the directional terms such as "upper" and "lower" used in the description of the embodiments of the present invention are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of the present invention. Furthermore, in the context, it should also be understood that when it is mentioned that one element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0022] This invention provides a swing harness type sailboard drive mechanism, combined with Figure 1 , Figure 5 The system includes a main housing 11, an A-axis drive assembly 1, a dual-axis connecting bracket 2, a B-axis drive assembly 3, and a solar panel connecting bracket 4. The A-axis drive assembly 1 is connected to the satellite via the satellite mounting surface 111 of the main housing 11. The dual-axis connecting bracket 2 is a U-shaped bracket, with one end fixedly connected to the output end of the A-axis drive assembly 1 and the other end fixedly connected to the B-axis drive assembly 3. The solar panel connecting bracket 4 is an L-shaped bracket, with one end fixedly connected to the output end of the B-axis drive assembly 3 and the other end having a solar panel mounting surface 41 connected to the solar panel. The B-axis drive assembly 3 and the A-axis drive assembly 1 are connected via cables to transmit signals and power.

[0023] Combination Figure 1 , Figure 2The A-axis drive assembly 1 mainly consists of a main housing 11, an A-axis drive motor 12, an A-axis harmonic gear reducer 13, an A-axis low-speed output shaft 14, an A-axis oscillating harness 15, an A-axis Hall sensor 16, an A-axis rear housing 17, an A-axis Hall baffle 18, and an A-axis rear cover 19. The A-axis drive motor 12 is preferably a two-phase stepper motor. The output end of the A-axis motor rotor 121 of the A-axis drive motor 12 is fixedly connected to the camshaft 131 of the A-axis harmonic gear reducer, enabling the A-axis drive motor 12 to drive the A-axis harmonic gear reducer 13 to rotate. The A-axis harmonic gear reducer is a short-cup harmonic reducer. The flexible wheel 132 of the A-axis harmonic gear reducer is fixedly connected to the A-axis low-speed output shaft 14. The flange side and the Hall sensor mounting side of the A-axis low-speed output shaft are distributed on both sides of the A-axis harmonic gear reducer 13. An oscillating harness 15 is located within the shaft hole of the A-axis low-speed output shaft 14 for power and signal transmission.

[0024] Combination Figure 1 , Figure 2 Hall sensor 16 is externally connected to the Hall mounting side 142 of the low-speed output shaft of the A-axis. The Hall sensor 16 includes two sensors, a main one and a backup one, to realize the zero-crossing indication of the A-axis drive assembly 1.

[0025] Combination Figure 1 , Figure 3 The B-axis drive assembly 3 mainly consists of a B-axis housing 35, a B-axis drive motor 31, a B-axis harmonic gear reducer 42, a B-axis low-speed flange shaft 33, and a B-axis potentiometer angle measuring assembly 34. The B-axis drive motor 31 is fixedly connected inside the B-axis housing 35, and the B-axis drive motor 31 is preferably a two-phase stepper motor. The B-axis motor rotor 311 is fixedly connected to the B-axis harmonic gear reducer wave generator 321 so that the B-axis drive motor 31 drives the B-axis harmonic gear reducer 32 to rotate. The B-axis harmonic gear reducer is a short-cup harmonic reducer.

[0026] Combination Figure 1 , Figure 3 The B-axis harmonic gear reducer flexure 322 is fixedly connected to the B-axis low flange shaft 33, which is also fixedly connected to the sailboard connecting bracket 4 to drive the sailboard connecting bracket 4 to rotate. The B-axis low flange shaft 33 passes through the potentiometer angle measuring assembly 34, which consists of two mutually redundant multi-turn continuously rotating potentiometers installed in parallel to provide angle indication for the B-axis drive assembly 3.

[0027] Combination Figure 4 The A-axis drive assembly 1 uses a swing harness 15 for power and signal transmission. This cable includes a total of 40 power harnesses and 38 signal harnesses.

[0028] Combination Figure 1 , Figure 4The oscillating harness 15 is wrapped with multiple layers of heat-shrinkable fabric at the section passing through the hole of the A-axis low-speed drive shaft 14, and again at the section where it exits the A-axis low-speed drive shaft 14 and enters the A-axis rear cover 19. The oscillating harness 15 is lantern-shaped inside the A-axis rear cover 19. The 14 leads of the A-axis motor 12 and Hall sensor 16 are fixed to the A-axis rear cover 19. The oscillating harness 15 runs from the flange side 141 of the A-axis low-speed output shaft, passes through the wire hole of the dual-axis connecting bracket 2, and is fixed to the solar panel connecting bracket 4 with a wire clamp, thus connecting with the solar panel. The oscillating harness 15 passes through the wire hole of the A-axis rear cover 19 and is fixed to the rear cover 19 with a wire clamp, thus connecting with the entire satellite.

[0029] By using the oscillating harness 15 wiring design, the harness resistance torque can be minimized when the A-axis drive assembly 1 oscillates ±175°, and the fatigue stress during the reciprocating oscillation of the harness can be minimized.

[0030] The motors, bearings, and harmonic reducers in both the A-axis and B-axis drive assemblies are lubricated with grease, which can achieve the goals of low cost, short assembly and adjustment cycle, and easy mass production.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A swing-wire harness type sailboard drive mechanism, characterized in that, It includes an A-axis drive assembly (1), a dual-axis connecting bracket (2), a B-axis drive assembly (3), and a solar panel connecting bracket (4). The A-axis drive assembly (1) is connected to the celestial body through the main housing (11). One end of the dual-axis connecting bracket (2) is fixedly connected to the output end of the A-axis drive assembly (1), and the other end of the dual-axis connecting bracket (2) is fixedly connected to the B-axis drive assembly (3). One end of the solar panel connecting bracket (4) is fixedly connected to the output end of the B-axis drive assembly (3), and the other end of the solar panel connecting bracket (4) is connected to the solar panel. The rotation axis of the output end of the A-axis drive assembly (1) is perpendicular to the rotation axis of the output end of the B-axis drive assembly (3). The low-speed drive shaft within the A-axis drive assembly (1) is connected to a swing harness (15) for signal and power transmission.

2. The driving mechanism according to claim 1, characterized in that, The A-axis drive assembly (1) includes a main housing (11), an A-axis drive motor (12), an A-axis harmonic gear reducer (13), an A-axis low-speed output shaft (14), and an A-axis oscillating harness (15). The A-axis harmonic gear reducer (13) includes an A-axis harmonic gear reducer camshaft (131) and an A-axis harmonic gear reducer flexure (132). The output end of the A-axis motor rotor (121) of the A-axis drive motor (12) is fixedly connected to the A-axis harmonic gear reducer camshaft (131) so that the A-axis drive motor (12) drives the A-axis harmonic gear reducer (13) to rotate. The A-axis harmonic gear reducer flexure (132) is fixedly connected to the A-axis low-speed output shaft (14). The A-axis low-speed output shaft (14) has a swing wire harness (15) in its shaft hole for power and signal transmission.

3. The driving mechanism according to claim 2, characterized in that, The A-axis drive assembly (1) also includes an A-axis Hall sensor (16), with a Hall sensor (16) for zero-position indication externally connected to the Hall mounting side (142) of the A-axis low-speed output shaft.

4. The driving mechanism according to claim 3, characterized in that, The A-axis drive assembly (1) also includes an A-axis rear housing (17), an A-axis Hall baffle (18), and an A-axis rear cover (19). The rear housing (17) inside the A-axis drive assembly (1) is connected to the Hall baffle (18) to prevent the swing harness (15) from contacting the Hall sensor (16) and to protect the Hall sensor (16). The A-axis rear cover (19) has reserved space in the A-axis axial direction for the swing harness (15) to swing ±175° to release stress.

5. The driving mechanism according to claim 4, characterized in that, The portion of the swing harness (15) passing through the shaft hole of the low-speed drive shaft (14) of the A-axis is wrapped with multiple layers of heat-shrinkable cloth, and the portion of the swing harness (15) exiting the shaft hole of the low-speed drive shaft (14) of the A-axis and entering the rear cover (19) is wrapped with multiple layers of heat-shrinkable cloth.

6. The driving mechanism according to claim 4, characterized in that, In the A-axis drive assembly (1), the 14 leads of the A-axis drive motor and the Hall sensor (16) are fixed on the inner wall of the A-axis rear cover (19), and the remaining swing wire harness (15) is wrapped with a polyimide insulating sleeve to protect the wire harness.

7. The driving mechanism according to claim 4, characterized in that, The oscillating harness (15) runs from the flange end of the low-speed transmission shaft (14) of the A-axis drive assembly (1), passes through the wire hole of the dual-axis connecting bracket (2), and is fixed to the solar panel connecting bracket (4) with a wire clamp, and docks with the solar panel. The oscillating harness (15) runs from the wire hole of the rear cover (19) of the A-axis drive assembly (1), is fixed to the rear cover (19) with a wire clamp, and docks with the entire satellite.

8. The driving mechanism according to claim 4, characterized in that, The swing harness (15) is inside the A-axis rear cover (19), and disperses and then converges along the axial direction, forming a lantern shape.

9. The driving mechanism according to claim 1, characterized in that, The B-axis drive assembly (3) includes a B-axis housing (35), a B-axis drive motor (31), a B-axis harmonic gear reducer (42), a B-axis low-speed flange shaft (33), and a B-axis potentiometer angle measuring assembly (34). The B-axis motor rotor (311) of the B-axis drive motor (31) is connected to the wave generator (321) of the B-axis harmonic gear reducer. The flexible wheel (322) of the B-axis harmonic gear reducer is connected to the low-speed flange shaft (33). The B-axis low-speed flange shaft (33) is fixed to the sailboard connecting bracket (4) to drive the sailboard connecting bracket (4) to rotate. The B-axis low-speed flange shaft (33) passes through the potentiometer angle measuring assembly (34). The potentiometer angle measuring assembly (34) is composed of two multi-turn continuously rotating potentiometers that are mutually redundant and installed in parallel to realize the angle indication of the B-axis drive assembly (3).

10. The driving mechanism according to claim 1, characterized in that, All components are lubricated with grease.

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