Large light on-orbit spacecraft deformable protective shield

Abstract

The invention belongs to the technical field of on-orbit spacecrafts, and relates to a large light deformable protective shield for an on-orbit spacecraft. The protective shield is simple and compact in structure, few in transmission path and high in overall reliability. The servo motor is adopted for control, the control precision is high, and remote control or remote sensing control can be achieved. The on-orbit spacecraft can be effectively protected by opening the protective shield, and impact of space debris on the on-orbit spacecraft is avoided or relieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of on-orbit spacecraft, and relates to a deformable shield for a large and light on-orbit spacecraft. BACKGROUND

[0002] The space environment in which an on-orbit spacecraft operates is deteriorating with the increasing frequency of space activities. Space debris at a speed of thousands of kilometers per second impacts the spacecraft, posing a great threat to the reliability and safety of the spacecraft. However, there is no effective method to block the space debris in the prior art. SUMMARY

[0003] According to one aspect of the application, a deformable shield for a large and light on-orbit spacecraft is provided, which is composed of a push rod base, an unfolding push rod, a base, an unfolding arm, a telescopic push rod, a protective cloth, a telescopic arm, a crank, and a driving pin shaft.

[0004] The unfolding arm and the telescopic arm adopt a frame structure and have lightening holes.

[0005] Optionally, the unfolding arm and the telescopic arm are made of an aluminum alloy material.

[0006] Optionally, the push rod base is provided with a plurality of unfolding push rods.

[0007] The base is installed above the push rod base.

[0008] The base is provided with a plurality of unfolding arms.

[0009] The fixed end of the telescopic push rod is installed in the unfolding arm, and the movable lead screw is installed on the telescopic arm.

[0010] The protective cloth is installed on the unfolding arm and the telescopic arm by hooks.

[0011] Optionally, the movable lead screw of the unfolding push rod is connected with the crank, and the crank, the base, and the unfolding arm are connected through the driving pin shaft. The on-orbit spacecraft deformable shield is configured as follows: the movable lead screw of the unfolding push rod is extended, the unfolding arm is driven to rotate around the pin shaft through the crank, and the unfolding action of the unfolding arm is realized. Conversely, the movable lead screw of the unfolding push rod is retracted, the unfolding arm is driven to rotate around the pin shaft through the crank, and the retraction action of the unfolding arm is realized.

[0012] The extension and retraction of the movable lead screw of the unfolding push rod are realized by the servo motor provided therein. After being extended to the position or retracted to the position, the brake provided in the unfolding push rod is used to brake and keep the current position.

[0013] The fixed end of the telescopic push rod is installed in the unfolding arm, the movable screw rod of the telescopic push rod is connected with the telescopic arm through a pin shaft, and the upper, lower, left and right four sides of the telescopic arm are respectively provided with rollers; wherein the movable screw rod of the telescopic push rod is extended to drive the telescopic arm to extend, and the movable screw rod of the telescopic push rod is retracted to drive the telescopic arm to retract.

[0014] The extension and retraction of the movable screw rod of the telescopic push rod is realized by the servo motor attached thereto, and the brake attached to the telescopic push rod is used to brake and keep the current position after the extension or retraction is completed.

[0015] Optionally, the unfolding push rod has more than 3;

[0016] The unfolding arm has more than 3.

[0017] The advantages of the present application are:

[0018] The protective shield structure is simple and compact, has few transmission paths, and has high overall reliability. The servo motor is used for control, which has high control precision and can realize remote or remote sensing control. The opening of the protective shield can effectively protect the on-orbit spacecraft and avoid or slow down the impact of space debris on the on-orbit spacecraft. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Schematic diagram of the deformable protective shield of the on-orbit spacecraft.

[0020] Figure 2 Schematic diagram of the unfolding arm and telescopic arm structure.

[0021] Figure 3 Schematic diagram of the unfolding of the deformable protective shield of the on-orbit spacecraft.

[0022] Wherein, 1-pusher seat; 2-unfolding push rod; 3-base; 4-unfolding arm; 5-telescopic push rod; 6-protection cloth; 7-telescopic arm; 8-crank; 9-driving pin shaft, 21-first motor; 22-first movable screw rod; 51-second motor. DETAILED DESCRIPTION

[0023] The present application will be described in detail below in conjunction with the embodiments, but the present application is not limited to these embodiments.

[0024] Example 1

[0025] A large lightweight on-orbit spacecraft deformable protective shield mainly consists of a pusher seat 1, an unfolding push rod 2, a base 3, an unfolding arm 4, a telescopic push rod 5, a protective cloth 6, a telescopic arm 7, a crank 8, and a driving pin shaft 9.

[0026] The protective shield has an unfolding length greater than 5 m and an unfolding area greater than 15 m2, and is an ultra-large protective device, and the main load-bearing structure, the unfolding arm 4 and the telescopic arm 7, adopts a frame structure and has weight-reducing holes for topological optimization, and the structure is shown in Figure 2 The unfolding arm 4 and the telescopic arm 7 both adopt triangular weight-reducing holes, and regular triangles and inverted triangles are alternately arranged, so that the weight of the protective shield is reduced to the maximum extent while the load-bearing capacity of the main body structure of the protective shield is ensured. The unfolding arm 4 and the telescopic arm 7 are made of aluminum alloy with high specific strength, in accordance with the principle of “high strength + low density”, so that the weight of the protective shield is reduced to the maximum extent.

[0027] The unfolding arm 4 and the telescopic arm 7 are made of aluminum alloy with high specific strength.

[0028] The push rod seat 1 is a mounting base of the unfolding push rod 2, and a plurality of unfolding push rods 2 are mounted thereon, and four unfolding push rods 2 are taken as an example.

[0029] The push rod seat 1 is also a mounting base of the base 3, and the base 3 is mounted above the push rod seat 1.

[0030] The base 3 is a mounting base of the unfolding arm 4, and a plurality of unfolding arms 4 are mounted thereon, and four unfolding arms 4 are taken as an example.

[0031] The unfolding arm 4 is a mounting base of the telescopic push rod 5, and the fixed end of the telescopic push rod 5 is mounted in the unfolding arm 4, and the movable end of the telescopic push rod 5 is mounted on the telescopic arm 7. Specifically, the telescopic push rod 5 comprises a motor and a nut screw connected to the motor, and the nut screw is threadedly connected with a movable lead screw, and the movable lead screw is mounted on the telescopic arm 7. The nut screw cannot move axially and can only rotate, and the movable lead screw cannot rotate and can only move axially. When the output shaft of the motor rotates, the nut screw is driven to rotate, the movable lead screw rotates relative to the nut screw, and the movable lead screw moves axially, so that the telescopic push rod 5 is telescoped, and the telescopic arm is unfolded or retracted. In the embodiment, the transmission connection between the motor output shaft and the nut screw can be gear mesh transmission, belt transmission or chain transmission, as long as the rotation of the nut screw can be driven, which is not limited herein. As shown in Figure 3 , the motor is named as the second motor 51, and the movable lead screw is named as the second movable lead screw (not shown in the figure).

[0032] The protective cloth 6 is mounted on the unfolding arm 4 and the telescopic arm 7 through the hooks mounted thereon, that is, the hooks are arranged on the unfolding arm 4 and the telescopic arm 7, and the protective cloth 6 is mounted on the unfolding arm 4 and the telescopic arm 7 through the hooks.

[0033] The large light-weight in-orbit spacecraft deformable protective shield can realize unfolding and telescoping actions.

[0034] The unfolding action is achieved by unfolding push rod 2, wherein the structure of unfolding push rod 2 can adopt the same structural features as telescopic push rod 5, that is, unfolding push rod 2 comprises a motor and a nut connected in transmission to the motor, the nut is threadedly connected with a movable screw rod, the end of the movable screw rod is installed on crank 8; wherein the nut cannot move axially and can only rotate, the movable screw rod cannot rotate and can only move axially, thus, when the output shaft of the motor rotates, it will drive the nut to rotate, the movable screw rod rotates relative to the nut, and then the movable screw rod moves axially to realize telescoping and drive the crank to move (swing). In the embodiment, the transmission connection mode between the output shaft of the motor and the nut can be gear mesh transmission, belt transmission or chain transmission, as long as it can realize the rotation drive of the nut, which is not limited here. The motor is named as first motor 21, and the movable screw rod is named as first movable screw rod 22.

[0035] In the embodiment, the movable screw rod of unfolding push rod 2 is connected with crank 8, crank 8, base 3 and unfolding arm 4 are connected through drive pin 9; specifically, one end of crank 8 is rotationally connected with the end of the movable screw rod, the other end is rotationally connected to base 3 through pin 9, pin 9 is rotationally connected to base 3, and pin 9 is fixedly connected to unfolding arm 4 and the other end of crank 8, so as to realize the relative fixed connection of crank 8 and unfolding arm 4, and the synchronous rotation of the two, that is, crank 8 drives unfolding arm 4 to rotate relative to base 3, so as to realize the opening and closing of the unfolding arm.

[0036] The movable screw rod of unfolding push rod 2 is extended, which drives unfolding arm 4 to rotate around pin 9 through crank 8, so as to realize the unfolding action of unfolding arm 4, and vice versa, the movable screw rod of unfolding push rod 2 is retracted, which drives unfolding arm 4 to rotate around pin 9 through crank 8, so as to realize the retracting action of unfolding arm 4;

[0037] The extension and retraction of the movable screw rod of unfolding push rod 2 are realized by the servo motor provided thereon, and the brake provided in unfolding push rod 2 is used to brake and keep the current position after the extension or retraction is completed; it should be noted that the brake herein can adopt the mature setting mode in the prior art, which is not limited here.

[0038] With the unfolding of unfolding arm 4 and the extension of telescopic arm 7, protective cloth 6 is stretched open, and protective shield is in an open state to protect the on-orbit spacecraft;

[0039] The extending action is realized by the telescopic push rod 5, the fixed end of the telescopic push rod 5 is installed in the unfolding arm 4, the movable screw rod of the telescopic push rod 5 is connected with the telescopic arm 7 through a pin shaft, the upper, lower, left and right four sides of the telescopic arm 7 are respectively installed with a certain number of rollers; the movable screw rod of the telescopic push rod 5 is extended, driving the telescopic arm 7 to extend, the movable screw rod of the telescopic push rod 5 is retracted, driving the telescopic arm 7 to retract; the rollers installed on the four sides of the telescopic arm 7 roll in the unfolding arm 4, the friction is small, the work of the telescopic push rod 5 can be reduced, and it is beneficial to installation in the unfolding arm 4;

[0040] The extension and retraction of the movable screw rod of the telescopic push rod 5 is realized by the servo motor attached thereto, and the brake attached to the telescopic push rod 5 is used to brake and keep the current position after extension or retraction. It should be noted that the brake herein can be set in the mature manner in the prior art, which is not limited herein.

[0041] From the above analysis, the deformable shield of the on-orbit spacecraft can block or slow down space debris in space, prevent the spacecraft from being hit to cause structural damage and key component failure, etc. The deformable shield of the on-orbit spacecraft is an active space debris protection mechanism, which can replace the traditional externally-mounted passive protection mechanism or serve as a supplement to the traditional protection mechanism. The application of the deformable shield can significantly enhance the safety of the operation of the on-orbit spacecraft, thereby improving its service life. The deformable shield of the on-orbit spacecraft needs to have the characteristics of light weight, on the basis of ensuring structural safety, functional compliance and adaptation to extreme space environment, the weight of the deformable shield is maximally reduced to compress the launch cost and improve the effective payload ratio.

[0042] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make several modifications or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A large, lightweight, deformable protective shield for on-orbit spacecraft, characterized in that, It consists of a push rod seat (1), an unfolding push rod (2), a base (3), an unfolding arm (4), a telescopic push rod (5), a protective cloth (6), a telescopic arm (7), a crank (8), and a drive pin (9); The deployable arm (4) and telescopic arm (7) adopt a frame structure and have weight reduction holes.

2. The large, lightweight, deformable protective shield for on-orbit spacecraft according to claim 1, characterized in that, The deployable arm (4) and telescopic arm (7) are made of high-strength aluminum alloy.

3. The large, lightweight, deformable protective shield for on-orbit spacecraft according to claim 1, characterized in that, The push rod seat (1) is equipped with multiple unfolding push rods (2); The base (3) is installed above the push rod seat (1); The base (3) is equipped with multiple deployable arms (4); The fixed end of the telescopic push rod (5) is installed inside the unfolding arm (4), and the movable screw is installed on the telescopic arm (7); The protective cloth (6) is installed on the unfolding arm (4) and the telescopic arm (7) by hooks.

4. The large, lightweight, deformable protective shield for on-orbit spacecraft according to claim 3, characterized in that, The movable lead screw of the deployment push rod (2) is connected to the crank (8), and the crank (8), the base (3), and the deployment arm (4) are connected by the drive pin (9). The deformable protective shield of the on-orbit spacecraft is configured as follows: the movable lead screw of the deployment push rod (2) extends and drives the deployment arm (4) to rotate around the pin through the crank (8) to realize the deployment action of the deployment arm (4); conversely, the movable lead screw of the deployment push rod (2) retracts and drives the deployment arm (4) to rotate around the pin through the crank (8) to realize the retraction action of the deployment arm (4). The extension and retraction of the movable screw of the unfolding push rod (2) are achieved by its own servo motor. After it is extended or retracted into place, it is braked by the brake of the unfolding push rod (2) and kept in the current position. The fixed end of the telescopic push rod (2) is installed inside the unfolding arm (4). The movable screw of the telescopic push rod (2) is connected to the telescopic arm (7) through a pin. Rollers are installed on the upper, lower, left and right sides of the telescopic arm (7). The movable screw of the telescopic push rod (5) extends, driving the telescopic arm (7) to extend. The movable screw of the telescopic push rod (5) retracts, driving the telescopic arm (7) to retract. The extension and retraction of the movable screw of the telescopic push rod (5) is achieved by its own servo motor. After it is extended or retracted into place, it is braked by the brake of the telescopic push rod (5) and kept in the current position.

5. The deformable protective shield for on-orbit spacecraft according to claim 3, characterized in that, The deploying push rod (2) has three or more; The deployable arm (4) has more than three.

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