A folding and locking mechanism for space optical loads

Abstract

The present invention relates to the technical field of space optical payloads, and in particular to a folding and locking mechanism for space optical payloads, wherein the folding and locking mechanism comprises a transmission mechanism, a locking mechanism, an active end base, and a driven end base; the driven end base rotates around the active end base through the transmission mechanism; the locking mechanism is used to realize the locking of the folding and locking mechanism when it is in an unfolded state; the folding and locking mechanism provided by the present invention can integrate the folding and locking mechanism into one, replacing the separate folding and locking mechanisms, thereby solving the problem of the latter having a large structural volume and mass, and making it adaptable to some specific occasions with strict requirements on volume and mass; compared with the separate folding and locking mechanisms, the folding and locking mechanism provided by the present invention has the characteristics of high integration, strong versatility, strong structural stability, etc.

Description

Technical Field

[0001] The invention relates to the technical field of space optical loads, and in particular to a folding, unfolding and locking mechanism for space optical loads. Background Art

[0002] Large aperture and long focal length are an important development direction of space optical payloads. For traditional space optical payloads, large aperture and long focal length often mean a substantial increase in volume. With the development of space optical technology, the envelope volume of rocket carriers is gradually becoming one of the main factors restricting the development of ultra-large space optical payloads. In order to break through the limitations of rocket carrying volume, scholars at home and abroad have proposed the technical concept of on-orbit deployment, that is, the space optical payload is launched in a folded state, and after entering the predetermined orbit, each modular unit is deployed on-orbit, and the locking between the units is achieved. The technical concept of on-orbit deployment has become one of the important methods to solve the problem of launching ultra-large space optical payloads. The on-orbit deployment of ultra-large space optical payloads involves a folding and locking mechanism. Therefore, a folding and locking mechanism for space optical payloads has important engineering practical significance.

[0003] The folding and unfolding locking mechanism for space optical payloads controls the folding and unfolding of each module unit through the folding and unfolding mechanism, and realizes the locking between the module units through the locking mechanism. At present, the folding and unfolding mechanism and the locking mechanism for space optical payloads are independent of each other, and the two are used together to realize the folding, unfolding and locking between the module units. However, the degree of integration of this type of structure is low, and the structure volume and mass are large. It cannot meet the needs of some occasions with strict requirements on volume and mass. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a folding and locking mechanism for space optical loads, which can integrate the folding and locking mechanism into one.

[0005] The present invention provides a folding and locking mechanism for space optical loads, the folding and locking mechanism comprising a transmission mechanism, a locking mechanism, an active end base, and a driven end base; the driven end base is connected to the active end base through the transmission mechanism; the locking mechanism comprises a screw assembly and a floating nut assembly, the screw assembly is mounted on the active end base, and the floating nut assembly is mounted on the driven end base;

[0006] The driven end base rotates around the active end base through the transmission mechanism; the locking mechanism is used to achieve locking of the folding and unfolding locking mechanism in the unfolded state.

[0007] Preferably, the transmission mechanism includes a drive motor, a worm, a worm wheel and a rotating shaft; the drive motor, the worm and the rotating shaft are all installed on the active end base, the power output shaft of the drive motor is connected to the worm, the worm wheel is fixedly installed on the rotating shaft, and the rotating shaft is connected to the driven end base; the worm wheel and the worm form a worm gear transmission and move in coordination with each other.

[0008] Preferably, the active end base is provided with a drive motor mounting frame, a worm mounting frame and a rotating shaft mounting frame; the driven end base is provided with a rotating shaft fixing interface;

[0009] The drive motor is installed on the active end base through the drive motor mounting frame; the power output shaft of the drive motor is connected to the worm through a coupling; the worm is installed in the worm mounting frame, and the rotating shaft is installed in the rotating shaft mounting frame; the rotating shaft is fixedly connected to the driven end base through the rotating shaft fixing interface.

[0010] Preferably, the screw assembly includes a locking screw, a planetary gear reducer and a locking motor; the floating nut assembly includes a compression spring and a floating nut; that is, the locking mechanism includes a compression spring, a floating nut, a locking screw, a planetary gear reducer and a locking motor.

[0011] Preferably, the locking motor drives the locking screw to rotate via the planetary gear reducer; the compression spring is arranged on the end face of the floating nut to press the floating nut; the floating nut can slide on the driven end base.

[0012] Preferably, the locking motor is installed on the planetary gear reducer, and the planetary gear reducer and the locking screw are both installed in the locking screw mounting seat on the active end base; the output shaft of the planetary gear reducer is connected to the locking screw; the floating nut is arranged in the floating nut mounting seat on the driven end base, and the floating nut can move along the slide groove of the floating nut mounting seat.

[0013] Preferably, a first locking docking surface and a first folding limit block are provided on the active end base; the first folding limit block is used to limit the extreme position of the folding and locking mechanism in the folded state; the second locking docking surface is used to provide a docking and locking contact plane when the folding and locking mechanism is unfolded.

[0014] Preferably, a second folding limit block and a second locking docking surface are provided on the driven end base; the second folding limit block is used to limit the extreme position of the folding and locking mechanism in the folded state; the second locking docking surface is used to provide a docking and locking contact plane when the folding and locking mechanism is unfolded.

[0015] The folding and locking mechanism provided by the present invention can integrate the folding and locking mechanism into one, replacing the separate folding and locking mechanisms, thereby solving the problem of the latter having large structural volume and mass, and making it adaptable to some specific occasions with strict requirements on volume and mass. Compared with the separate folding and locking mechanisms, the folding and locking mechanism provided by the present invention has the characteristics of high integration, strong versatility, strong structural stability, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the unfolded state of the folding and locking mechanism for the space optical load in a specific embodiment of the present invention;

[0017] Figure 2 It is a schematic diagram of the folded state structure of the folding and locking mechanism for space optical loads in a specific embodiment of the present invention;

[0018] Figure 3 It is a schematic diagram of the transmission mechanism structure in a specific implementation manner of the present invention;

[0019] Figure 4 It is a schematic diagram of the locking mechanism structure in a specific embodiment of the present invention;

[0020] Figure 5 This is a schematic diagram of the active end base structure in a specific implementation manner of the present invention;

[0021] Figure 6 It is a schematic diagram of the structure of the driven end base in a specific implementation manner of the present invention.

[0022] Reference numerals

[0023] Transmission mechanism 1, locking mechanism 2, active end base 3, driven end base 4, drive motor 11, drive motor mounting bracket 12, coupling 13, worm 14, worm wheel 15, rotating shaft 16, compression spring 21, floating nut 22, locking screw 23, planetary gear reducer 24, locking motor 25, first locking docking surface 31, worm mounting bracket 32, rotating shaft mounting bracket 33, first folding limit block 34, locking screw mounting seat 35, second folding limit block 41, floating nut mounting seat 42, rotating shaft fixing interface 43, second locking docking surface 44. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not constitute a limitation of the present invention.

[0025] It should be understood that although the terms first, second, third, etc. may be used to describe in the specific embodiments of the present invention, these should not be limited to these terms. These terms are only used to distinguish. For example, without departing from the scope of the specific embodiments of the present invention, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0026] In a specific embodiment of the present invention, a folding and locking device for space optical loads is provided.

[0027] Institutions, such as Figure 1 and Figure 2 As shown, they are respectively a schematic diagram of the unfolded state structure and a schematic diagram of the unfolded state structure of the folding and unfolding locking mechanism for space optical payloads in a specific embodiment of the present invention. It can be seen from the figure that the folding and unfolding locking mechanism includes a transmission mechanism 1, a locking mechanism 2, an active end base 3, and a driven end base 4; the driven end base 4 is connected to the active end base 3 through the transmission mechanism 1; the locking mechanism 2 includes a screw assembly and a floating nut assembly, the screw assembly is installed on the active end base 3, and the floating nut assembly is installed on the dispersive driven end base 4; the driven end base 4 rotates around the active end base 3 through the transmission mechanism 1; the locking mechanism 2 can provide a reliable locking force when the folding and unfolding locking mechanism is in the unfolded state, ensuring that the mechanism has sufficient stability for realizing the locking of the folding and unfolding locking mechanism when it is in the unfolded state.

[0028] In a specific implementation manner, Figure 3 As shown, a schematic diagram of the transmission mechanism structure in a specific embodiment of the present invention is shown. It can be seen from the figure that the transmission mechanism 1 includes a drive motor 11, a drive motor mounting frame 12, a coupling 13, a worm 14, a worm wheel 15, and a rotating shaft 16. The drive motor 11 is mounted on the active end base 3 through the drive motor mounting frame 12, and the drive motor mounting frame 12 is fixedly connected to the active end base 3. The power output shaft of the drive motor 11 is connected to the worm 14 through the coupling 13, and the coupling 13 is used to transmit rotational motion. The worm 14 is mounted in the worm mounting frame 32 on the active end base 3; the rotating shaft 16 is fixedly connected to the driven end base 4 through the rotating shaft fixing interface 43 on the driven end base 4, and the rotating shaft 16 is mounted in the rotating shaft mounting frame 33 on the active end base 3, and the worm wheel 15 is fixedly mounted on the rotating shaft 16. The worm wheel 15 and the worm 14 form a worm gear transmission, and move in coordination with each other.

[0029] In a specific implementation manner, Figure 4As shown, a schematic diagram of the locking mechanism structure in a specific embodiment of the present invention is shown. It can be seen from the figure that the screw assembly of the locking mechanism 2 includes a locking screw 23, a planetary gear reducer 24 and a locking motor 25; the floating nut assembly includes a compression spring 21 and a floating nut 22; that is, the locking mechanism 2 includes a compression spring 21, a floating nut 22, a locking screw 23, a planetary gear reducer 24, and a locking motor 25. The locking motor 25, the planetary gear reducer 24, and the locking screw 23 are installed in the locking screw mounting seat 35 on the active end base 3. The locking motor 25 drives the locking screw 23 to rotate through the planetary reducer 24, and the locking screw 23 is screwed into the floating nut 22, pulling the floating nut 22 to move, and driving the floating nut 22 to slide on the driven end base 4. The floating nut 22 is arranged in the floating nut mounting seat 42 on the driven end base 4, and can move along the slide groove of the floating nut mounting seat 42. The compression spring 21 is arranged on the end surface of the floating nut 22 to press the floating nut 22 .

[0030] In a specific implementation manner, Figure 5 As shown, a schematic diagram of the active end base structure in a specific embodiment of the present invention is shown. It can be seen from the figure that the active end base 3 is provided with a first locking docking surface 31, a worm mounting frame 32, a shaft mounting frame 33, a first folding limit block 34, and a locking screw mounting seat 35. The shaft mounting frame 33 is used to provide a mounting interface with the rotating shaft 16 in the transmission mechanism 1; the worm mounting frame 32 is used to provide a mounting interface with the worm 14 in the transmission mechanism 1; the locking screw mounting seat 35 is used to provide a mounting interface with the locking screw 23, the locking motor 25, and the planetary gear reducer 24 in the locking mechanism 2. The first folding limit block 34 is used to limit the folding state limit position of the folding locking mechanism. The first locking docking surface 31 is used to provide a stable and reliable docking and locking contact plane when the folding and locking mechanism is unfolded.

[0031] In a specific implementation manner, Figure 6 As shown, a schematic diagram of the driven end base structure in a specific embodiment of the present invention is shown. It can be seen from the figure that a second folding limit block 41, a floating nut mounting seat 42, a rotating shaft fixing interface 43, and a second locking docking surface 44 are provided on the driven end base 4. The rotating shaft fixing interface 43 is used for fixed installation with the rotating shaft 16. The floating nut mounting seat 42 is used to install the floating nut 22. The second folding limit block 41 is used to limit the folding state limit position of the folding locking mechanism. The second locking docking surface 44 is used to provide a stable and reliable docking locking contact plane when the folding locking mechanism is unfolded.

[0032] The specific working principle of the folding and locking mechanism for space optical loads provided in the specific implementation of the present invention is as follows:

[0033] When the satellite is launched, the folding and locking mechanism is in a folded state, and the first folding limit block 34 and the second folding limit block 41 are in contact. The folding and locking mechanism is self-locked by the self-locking property of the worm gear 15 and the worm 14 and the first folding limit block 34 and the second limit block 41, thereby ensuring that the folding and locking mechanism does not move during the launch process.

[0034] After the space optical payload enters orbit, the drive motor 11 is decelerated by the worm gear 15 and the worm 14, and drives the shaft 16 to rotate. The shaft 16 drives the driven end base 4 fixed thereto to rotate through the shaft fixing interface 43 on the driven end base 4. After the locking screw 23 enters the interior of the floating nut 22 mounting seat 42, the driven end base 4 continues to rotate, and the locking screw 23 touches and presses the floating nut 22, and the floating nut 22 moves along the slide groove on the floating nut mounting seat 42. When the first locking docking surface 31 and the second locking docking surface 44 on the active end base 3 and the driven end base 4 overlap with each other, the drive motor 11 stops rotating, and the unfolding movement of the folding and unfolding locking mechanism is completed.

[0035] The locking motor 25 starts, and drives the locking screw 23 to rotate through the planetary gear reducer 24. The locking screw 23 is screwed into the thread of the floating nut 22, and starts to pull the floating nut 22 downward to make it move downward; then the floating nut 22 contacts the lower end surface of the floating nut mounting seat 42, and applies downward pressure to the floating nut mounting seat 42. At this time, the first locking docking surface 31 and the second locking docking surface 44 on the active end base 3 and the driven end base 4 generate contact pressure. When the pressure reaches a certain value, the locking motor 25 stops working, and the locking mechanism 2 locks the active end base 3 and the driven end base 4, thereby realizing the deployment and locking of the entire structure.

[0036] The folding and locking mechanism provided by the present invention can integrate the folding and locking mechanism into one, replacing the separate folding and locking mechanisms, thereby solving the problem of the latter having large structural volume and mass, and making it adaptable to some specific occasions with strict requirements on volume and mass. Compared with the separate folding and locking mechanisms, the folding and locking mechanism provided by the present invention has the characteristics of high integration, strong versatility, strong structural stability, etc.

[0037] Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

[0038] The above specific implementations of the present invention do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A folding and locking mechanism for space optical loads, characterized in that: The folding and locking mechanism comprises a transmission mechanism (1), a locking mechanism (2), an active end base (3), and a passive end base (4); The driven end base (4) is connected to the active end base via the transmission mechanism (1). (3) connection; the locking mechanism (2) comprises a screw assembly and a floating nut assembly, the screw assembly is mounted on the active end base (3), and the floating nut assembly is mounted on the passive end base (4); The driven end base (4) is connected around the driving end base through the transmission mechanism (1). (3) rotation; the locking mechanism (2) is used to realize the folding and unfolding locking mechanism in the unfolded state. Locking in state.

2. The folding and locking mechanism according to claim 1, characterized in that: The transmission mechanism (1) comprises a drive motor (11), a worm (14), a worm wheel (15) and a rotating shaft (16); the drive motor (11), the worm (14) and the rotating shaft (16) are all mounted on the active end base (3); a power output shaft of the drive motor (11) is connected to the worm wheel (15) and the rotating shaft (16) is connected to the worm wheel (14). The worm wheel (15) is fixedly mounted on the rotating shaft (16), and the rotating shaft (16) is connected to the driven end base (4); the worm wheel (15) and the worm (14) form a worm gear transmission and move in coordination with each other.

3. The folding and locking mechanism according to claim 2, characterized in that: The active end base (3) is provided with a drive motor mounting frame (12), a worm mounting frame (32) and a rotating The driven end base (4) is provided with a rotating shaft fixing interface (43); the driving motor (11) is mounted on the driven end base (4) through the driving motor mounting frame (12). On the active end base (3); the power output shaft of the drive motor (11) is connected through a coupling (13) is connected to the worm (14); the worm (14) is mounted in the worm mounting frame (32), and the rotating shaft (16) is mounted in the rotating shaft mounting frame (33); The rotating shaft (16) is fixedly connected to the driven end base (4) via the rotating shaft fixing interface (43).

4. The folding and locking mechanism according to claim 1, characterized in that: The screw assembly comprises a locking screw (23), a planetary gear reducer (24), and a locking motor (25); the floating nut assembly comprises a compression spring (21) and a floating nut (22).

5. The folding and locking mechanism according to claim 4, characterized in that: The locking motor (25) drives the locking screw (23) to rotate via the planetary gear reducer (24); the compression spring (21) is arranged on the end surface of the floating nut (22) to press the floating nut (22); the floating nut (22) can be mounted on the driven end base (4). Slide up.

6. The folding and locking mechanism according to claim 5, characterized in that: The locking motor (25) is mounted on the planetary gear reducer (24); the planetary gear reducer (24) and the locking screw (23) are both mounted in a locking screw mounting seat (35) on the active end base (3); the output shaft of the planetary gear reducer (24) is connected to the active end base (3). The locking screw (23) is connected; the floating nut (22) is arranged on the driven end base (4), the floating nut (22) can move along the slide groove of the floating nut mounting seat (42).

7. The folding and locking mechanism according to claim 1, characterized in that: The active end base (3) is provided with a first locking butt joint surface (31) and a first folding limit block (34); The first folding limit block (34) is used to limit the extreme position of the folding and locking mechanism in the folded state; the first locking docking surface (31) is used to provide a docking and locking contact plane when the folding and locking mechanism is unfolded.

8. The folding and locking mechanism according to claim 1, characterized in that: The driven end base (4) is provided with a second folding limit block (41) and a second locking butt joint surface (44); The second folding limit block (41) is used to limit the extreme position of the folding and locking mechanism in the folded state; the second locking docking surface (44) is used to provide a docking and locking contact plane when the folding and locking mechanism is unfolded.

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