A photoelectric load shafting structure capable of resisting high overload

Abstract

The present invention discloses a photoelectric load shafting structure capable of resisting high overloads, belonging to the technical field of photoelectric load shafting structures. It solves the problems of poor rigidity and low angle measurement accuracy of existing shafting structures. The structure specifically includes a housing assembly, a spindle assembly disposed inside the housing assembly, and the housing assembly is movably connected to the spindle assembly via a first bearing and a second bearing. The first bearing and the second bearing are disposed at both ends of the spindle assembly. A brushless motor and a magnetic encoder are disposed within the housing assembly, and the inner ring of the magnetic encoder is connected to the spindle assembly. A servo drive board is also disposed within the housing assembly. In the present invention, the first bearing and the second bearing are disposed at both ends of the spindle assembly to increase the spindle assembly's anti-overturning moment and improve the shafting structure's impact resistance. The brushless motor is placed between the first bearing and the second bearing to increase the overall structural compactness and reduce the volume. A magnetic encoder is used to detect the rotation angle of the spindle assembly, resulting in high detection accuracy and fast response.

Description

Technical Field

[0001] The present invention relates to the technical field of photoelectric load shafting structures, and in particular to a photoelectric load shafting structure capable of resisting high overload. Background Art

[0002] The shafting structure connects the carrier (e.g., drones, aircraft, etc.) to the optoelectronic payload. Due to the limitations of shafting applications and payload capacity, high requirements are placed on its size and weight. Shafting structures are often required to be small, lightweight, with high technical specifications and excellent performance.

[0003] The existing shafting structure of small photoelectric loads usually uses two deep groove ball bearings, and the two deep groove ball bearings are arranged in the middle of the main shaft, so the shafting rigidity is poor and the performance in resisting impact is insufficient; in addition, the existing shafting structure uses a single Hall sensor to measure angular displacement, so the interior of the shafting structure cannot be completely hollow, resulting in poor shafting energy, which is not conducive to system routing; and the measurement accuracy of the single Hall sensor itself is also low, which cannot achieve accurate measurement of angular displacement. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a photoelectric load shafting structure capable of resisting high overload, which solves the problems of poor rigidity and low angle measurement accuracy of the existing shafting structure.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A photoelectric load shafting structure capable of resisting high overload, comprising a housing assembly, a spindle assembly, a brushless motor, a first bearing, a second bearing, a magnetic encoder, and a servo drive board;

[0007] A main shaft assembly is provided inside the housing assembly, and the housing assembly is movably connected to the main shaft assembly through a first bearing and a second bearing; the first bearing and the second bearing are provided at both ends of the main shaft assembly;

[0008] A brushless motor is provided in the housing assembly, and the brushless motor is provided between the first bearing and the second bearing; the motor stator of the brushless motor is fixed on the housing assembly, and the motor rotor of the brushless motor is connected to the main shaft assembly; a magnetic encoder is provided in the housing assembly, and the inner ring of the magnetic encoder is connected to the main shaft assembly; a servo drive board is also provided in the housing assembly, and the servo drive board is electrically connected to the brushless motor and the magnetic encoder respectively.

[0009] In this solution, the first bearing and the second bearing are respectively placed at both ends of the main shaft assembly to increase the distance between the two force points on the main shaft assembly, thereby increasing the anti-overturning moment of the main shaft assembly; at the same time, the first bearing and the second bearing can withstand radial and axial bidirectional loads, thereby improving the impact resistance of the shaft system structure to overload impacts in all directions; the brushless motor is placed between the first bearing and the second bearing to increase the compactness of the overall structure and reduce the volume; a magnetic encoder is used to detect the rotation angle of the main shaft assembly, with high detection accuracy and fast response.

[0010] Furthermore, the housing assembly includes an azimuth top cover, a motor upper housing, and a motor lower housing; the azimuth top cover and the motor lower housing are respectively connected to two ends of the motor upper housing;

[0011] The inner wall of the motor upper housing is connected with a mounting plate, and the servo drive board is mounted on the mounting plate; the brushless motor is mounted between the mounting plate and the motor lower housing.

[0012] In this solution, the housing assembly is assembled from three parts: the azimuth top cover, the motor upper housing, and the motor lower housing, which is easy to disassemble and install; and reduces the difficulty of processing or assembly and reduces costs.

[0013] Furthermore, the first bearing is arranged in a bearing seat in the lower housing of the motor, the outer ring of the first bearing is connected to the lower housing of the motor, and the inner ring of the first bearing is connected to the main shaft assembly;

[0014] The second bearing is arranged in a bearing seat on the mounting plate, the outer ring of the second bearing is connected to the mounting plate, and the inner ring of the second bearing is connected to the main shaft assembly.

[0015] Furthermore, a first bearing outer pressure ring is connected to the bearing seat of the lower housing of the motor via screws, and the first bearing outer pressure ring fixes the outer ring of the first bearing.

[0016] Furthermore, the inner ring of the second bearing is connected to a second bearing inner pressure ring, and the outer ring of the second bearing is connected to a second bearing outer pressure ring; the second bearing outer pressure ring is connected to the mounting plate;

[0017] The magnetic encoder is installed on the outer pressure ring of the second bearing.

[0018] In this solution, during operation, the brushless motor drives the spindle assembly to rotate, the spindle assembly drives the inner ring of the magnetic encoder to rotate, and the magnetic encoder detects the rotation angle of the spindle assembly.

[0019] Furthermore, the main shaft assembly includes a main shaft, and a secondary shaft is connected to the bottom of the main shaft; the interior of the main shaft is a hollow cavity, and an electric slip ring is provided in the hollow cavity; the rotor of the electric slip ring is connected to the main shaft, and the stator of the electric slip ring passes through the main shaft and is connected to the azimuth top cover.

[0020] In this solution, the interior of the main shaft adopts a completely hollow design, and an electric slip ring is designed inside it to facilitate the threading between the shaft structure and the optoelectronic load.

[0021] Furthermore, a motor pressing ring is connected to the outside of the main shaft via screws, and the motor pressing ring fixes the motor rotor of the brushless motor.

[0022] Furthermore, the azimuth top cover and the motor upper shell are both provided with connecting ears, and the azimuth top cover and the motor upper shell are connected by bolts passing through the connecting ears.

[0023] The beneficial effects of the present invention are:

[0024] The present invention provides a high-overload-resistant optoelectronic load shafting structure with a compact internal structure, small size, and lightweight, making it suitable for use with various machine carriers. A first and second bearing are provided at each end of the main shaft to increase its anti-overturning moment and improve its impact resistance, making it suitable for use in small optoelectronic loads with high standards. An electric slip ring is installed within the hollow cavity within the main shaft, providing strong wire routing and facilitating system routing. The shaft also achieves a 360-degree rotation and a wide range of rotation angles. A high-precision magnetic encoder is used to detect the main shaft rotation angle, providing high resolution, accuracy, and stability, improving angular measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic cross-sectional view of a photoelectric load shafting structure capable of resisting high overload according to the present invention;

[0026] Figure 2 This is a structural schematic diagram of a photoelectric load shafting structure capable of resisting high overloads without the outer shell component of the present invention;

[0027] Figure 3 This is a schematic diagram of the appearance of a photoelectric load shafting structure capable of resisting high overload according to the present invention.

[0028] Reference numerals:

[0029] 1. Housing assembly; 11. Azimuth top cover; 12. Motor upper housing; 13. Motor lower housing; 14. Mounting plate; 15. Connecting lugs; 2. Spindle assembly; 21. Spindle; 22. Countershaft; 23. Electric slip ring; 3. Brushless motor; 31. Motor pressure ring; 4. First bearing; 41. First bearing outer pressure ring; 5. Second bearing; 51. Second bearing inner pressure ring; 52. Second bearing outer pressure ring; 6. Magnetic encoder; 7. Servo drive board; DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Specific embodiments of the present invention are described below to facilitate understanding of the present invention by those skilled in the art. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the appended claims, these changes are obvious, and all inventions and creations utilizing the concepts of the present invention are protected.

[0031] like Figure 1 and Figure 2 As shown, this embodiment provides a photoelectric load shafting structure that can withstand high overloads. The shafting structure is small in size, light in weight, and has strong shafting rigidity, and is applicable to various small photoelectric loads. Specifically, it includes:

[0032] Housing assembly 1, spindle assembly 2, brushless motor 3, first bearing 4, second bearing 5, magnetic encoder 6 and servo drive board 7;

[0033] Among them, a spindle assembly 2 is provided inside the shell assembly 1, and the shell assembly 1 is movably connected to the spindle assembly 2 through a first bearing 4 and a second bearing 5; the first bearing 4 and the second bearing 5 are arranged at both ends of the spindle assembly 2 to increase the distance between the two force points on the spindle assembly 2 and increase the anti-overturning moment of the spindle assembly 2; a brushless motor 3 is provided in the shell assembly 1, and the brushless motor 3 is provided between the first bearing 4 and the second bearing 5; the motor stator of the brushless motor 3 is fixed on the shell assembly 1, and the motor rotor of the brushless motor 3 is connected to the spindle assembly 2; a magnetic encoder 6 is provided in the shell assembly 1, and the inner ring of the magnetic encoder 6 is connected to the spindle assembly 2; a servo drive board 7 is also provided in the shell assembly 1, and the servo drive board 7 is electrically connected to the brushless motor 3 and the magnetic encoder 6 respectively.

[0034] The housing assembly 1 includes an azimuth top cover 11, a motor upper housing 12 and a motor lower housing 13; the azimuth top cover 11 and the motor lower housing 13 are respectively connected to the two ends of the motor upper housing 12; the inner wall of the motor upper housing 12 is connected to a mounting disk 14, and the servo drive board 7 is installed on the mounting disk 14; the brushless motor 3 is installed between the mounting disk 14 and the motor lower housing 13; the housing assembly 1 is assembled from three parts: the azimuth top cover 11, the motor upper housing 12 and the motor lower housing 13, which is easy to disassemble and install; and reduces the difficulty of processing or assembly, thereby reducing costs.

[0035] The first bearing 4 is arranged in a bearing seat inside the lower housing 13 of the motor, the outer ring of the first bearing 4 is connected to the lower housing 13 of the motor, and the inner ring of the first bearing 4 is connected to the main shaft assembly 2; the second bearing 5 is arranged in a bearing seat on the mounting plate 14, the outer ring of the second bearing 5 is connected to the mounting plate 14, and the inner ring of the second bearing 5 is connected to the main shaft assembly 2.

[0036] A first bearing outer pressure ring 41 is connected to the bearing seat of the motor lower housing 13 via screws. The first bearing outer pressure ring 41 fixes the outer ring of the first bearing 4 .

[0037] The inner ring of the second bearing 5 is connected to the second bearing inner pressure ring 51, and the outer ring of the second bearing 5 is connected to the second bearing outer pressure ring 52; the second bearing outer pressure ring 52 is connected to the mounting plate 14; the magnetic encoder 6 is installed on the second bearing outer pressure ring 52; during operation, the brushless motor 3 drives the spindle assembly 2 to rotate, and the spindle assembly 2 drives the inner ring of the magnetic encoder 6 to rotate, and the magnetic encoder 6 detects the rotation angle of the spindle assembly 2.

[0038] As a preference of this embodiment, the magnetic encoder 6 can adopt a high-precision MBS-13-32-A-17BM-BNAM model encoder.

[0039] The spindle assembly 2 includes a main shaft 21, with a secondary shaft 22 connected to its bottom. The main shaft 21 has a hollow interior, housing a slip ring 23. The rotor of the slip ring 23 is connected to the main shaft 21, while the stator of the slip ring 23 extends through the main shaft 21 and connects to the azimuth cover 11, facilitating wiring between the shafting structure and the optoelectronic load. The inner ring of the magnetic encoder 6 and the rotor of the brushless motor 3 are also connected to the main shaft 21.

[0040] The outside of the main shaft 21 is connected to a motor pressing ring 31 via screws, and the motor pressing ring 31 fixes the motor rotor of the brushless motor 3 .

[0041] like Figure 3 As shown, the azimuth top cover 11 and the motor upper housing 12 are both provided with connecting ears 15 , and the azimuth top cover 11 and the motor upper housing 12 are connected by bolts passing through the connecting ears 15 .

[0042] The working principle of this embodiment is:

[0043] When the photoelectric load shaft system structure provided in this embodiment is working, after the coil on the motor stator of the brushless motor 3 is energized, the motor stator drives the motor rotor to rotate, and the motor rotor drives the main shaft 21 and the secondary shaft 22 to rotate; the main shaft 21 is rotationally connected to the housing assembly 1 through the first bearing 4 and the second bearing 5; when the main shaft 21 rotates, it drives the inner ring of the magnetic encoder 6 to rotate synchronously, completing the measurement of the main shaft rotation angle.

[0044] Those skilled in the art will appreciate that the embodiments herein are intended to help readers understand the principles of the present invention, and it should be understood that the scope of protection of the present invention is not limited to such specific descriptions and embodiments. Those skilled in the art can make various other specific variations and combinations based on the technical teachings disclosed in the present invention without departing from the essence of the present invention, and such variations and combinations are still within the scope of protection of the invention.

Claims

1. A photoelectric load shafting structure capable of resisting high overload, characterized by: It comprises a housing assembly (1), a spindle assembly (2), a brushless motor (3), a first bearing (4), a second bearing (5), a magnetic encoder (6) and a servo drive board (7); A spindle assembly (2) is provided inside the housing assembly (1), and the housing assembly (1) is movably connected to the spindle assembly (2) via a first bearing (4) and a second bearing (5); the first bearing (4) and the second bearing (5) are provided at both ends of the spindle assembly (2); A brushless motor (3) is provided in the housing assembly (1), and the brushless motor (3) is provided between the first bearing (4) and the second bearing (5); a motor stator of the brushless motor (3) is fixed to the housing assembly (1), and a motor rotor of the brushless motor (3) is connected to the main shaft assembly (2); A magnetic encoder (6) is provided in the housing assembly (1), and an inner ring of the magnetic encoder (6) is connected to the spindle assembly (2); A servo drive board (7) is further provided in the housing assembly (1), and the servo drive board (7) is electrically connected to the brushless motor (3) and the magnetic encoder (6) respectively; The housing assembly (1) comprises an azimuth top cover (11), a motor upper housing (12) and a motor lower housing (13); the azimuth top cover (11) and the motor lower housing (13) are respectively connected to two ends of the motor upper housing (12); The inner wall of the motor upper housing (12) is connected to a mounting plate (14), and the servo drive board (7) is mounted on the mounting plate (14); the brushless motor (3) is mounted between the mounting plate (14) and the motor lower housing (13); The first bearing (4) is arranged in a bearing seat in the motor lower housing (13), the outer ring of the first bearing (4) is connected to the motor lower housing (13), and the inner ring of the first bearing (4) is connected to the main shaft assembly (2); The second bearing (5) is arranged in a bearing seat on the mounting plate (14), the outer ring of the second bearing (5) is connected to the mounting plate (14), and the inner ring of the second bearing (5) is connected to the main shaft assembly (2); The inner ring of the second bearing (5) is connected to a second bearing inner pressure ring (51), and the outer ring of the second bearing (5) is connected to a second bearing outer pressure ring (52); the second bearing outer pressure ring (52) is connected to the mounting plate (14); the magnetic encoder (6) is mounted on the second bearing outer pressure ring (52); during operation, the brushless motor (3) drives the spindle assembly (2) to rotate, the spindle assembly (2) drives the inner ring of the magnetic encoder (6) to rotate, and the magnetic encoder (6) detects the rotation angle of the spindle assembly (2); The main shaft assembly (2) includes a main shaft (21), and a secondary shaft (22) is connected to the bottom of the main shaft; the interior of the main shaft (21) is a hollow cavity, and an electric slip ring (23) is provided in the hollow cavity; the rotor of the electric slip ring (23) is connected to the main shaft (21), and the stator of the electric slip ring (23) passes through the main shaft (21) and is connected to the azimuth top cover (11); The outside of the main shaft (21) is connected to a motor pressing ring (31) via screws, and the motor pressing ring (31) fixes the motor rotor of the brushless motor (3).

2. The photoelectric load shafting structure capable of resisting high overload according to claim 1, characterized in that: A first bearing outer pressure ring (41) is connected to the bearing seat of the motor lower housing (13) via screws, and the first bearing outer pressure ring (41) fixes the outer ring of the first bearing (4).

3. The photoelectric load shafting structure capable of resisting high overload according to claim 1, characterized in that: The azimuth top cover (11) and the motor upper housing (12) are both provided with connecting ears (15), and the azimuth top cover (11) and the motor upper housing (12) are connected via bolts passed through the connecting ears (15).

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