A multi-point linkage locking and release device for a turntable based on segmented straps and ropes.

Abstract

This invention relates to a multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes, belonging to the technical fields of space pointing and tracking mechanisms and space servo turntables. The turntable's U-shaped frame is positioned with its opening facing upwards above the satellite module. A locking bracket is positioned at each of the four corners of the bottom of the U-shaped frame. Four locking seats correspond one-to-one with the locking brackets. Each strap covers the outer wall of the corresponding locking bracket where it connects to the locking seat. Two wire harnesses are positioned opposite each other on one side of the bottom of the U-shaped frame. Two locking and releasing devices are positioned opposite each other on the other two sides of the bottom of the U-shaped frame. All two wire harnesses and two locking and releasing devices are mounted on the upper surface of the satellite module. The wire harnesses, straps, and locking and releasing devices are each connected by a locking rope. This invention has the advantage of small envelope space occupied by multi-point distributed locking, while simultaneously improving unlocking reliability and reducing locking costs.

Description

Technical Field

[0001] This invention belongs to the field of spatial pointing and tracking mechanisms and spatial servo turntable technology, and relates to a multi-point linkage locking and release device for a turntable based on segmented straps and rope systems. Background Technology

[0002] The latitude and longitude ceremony turntable is one of the most widely used types of space servo turntables, and its typical configuration is as follows: Figure 1 As shown, it mainly includes: an azimuth axis system, a pitch axis system, a U-shaped frame, and a load. The azimuth axis system and the pitch axis system are mechanically connected through the U-shaped frame. The pitch axis system is further divided into two components: the pitch axis system drive end and the pitch axis system support end. The two components are respectively installed on both sides of the U-shaped frame to support the load and provide rotation direction.

[0003] For servo turntables used in space, the U-shaped frame needs to be locked to the satellite's module during launch to resist dynamic loads. After the satellite enters orbit, the U-shaped frame needs to be unlocked and released to allow the turntable to rotate freely.

[0004] The most common method for locking a U-shaped frame is to use multiple locking and releasing devices to lock at multiple points around the U-shaped frame. This method is the simplest and most effective. However, these locking and releasing devices are connected in series. After the satellite enters orbit, if even one locking and releasing device fails to unlock, the turntable's rotation function will be disabled. Furthermore, individual locking and releasing devices are often expensive, and multi-point locking requires multiple devices, resulting in very high economic costs and poor reliability.

[0005] The wrap-around locking scheme can effectively solve the above problems. Wrap-around locking uses a large wrap-around strap to completely enclose the U-shaped frame and satellite module, while employing 1-2 sets of locking and releasing devices for locking. After the satellite enters orbit, the locking and releasing devices unlock, releasing the U-shaped frame and allowing the turntable to rotate freely. If two sets of locking and releasing devices are used, the U-shaped frame will be released as long as one set successfully unlocks. This scheme not only uses fewer locking and releasing devices, significantly reducing economic costs, but also provides backup for each other, greatly improving reliability. However, the wrap-around locking scheme also has drawbacks: the large wrap-around strap needs to be wrapped around the entire U-shaped frame, occupying a large envelope space. It is difficult for the satellite module to provide the necessary envelope space; therefore, this scheme is rarely used. Summary of the Invention

[0006] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose a multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes. This device has the advantages of small envelope space occupied by multi-point distributed locking, while improving unlocking reliability and reducing locking cost.

[0007] The solution of the present invention is:

[0008] A multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes includes a satellite compartment panel, four locking seats, four locking brackets, a U-shaped frame for the turntable, four straps, two wire harnesses, two locking and releasing devices, and eight locking ropes.

[0009] The satellite module is placed horizontally. The U-shaped frame of the turntable is positioned above the satellite module with its opening facing upwards. A locking bracket is installed at each of the four corners of the bottom of the U-shaped frame. Four locking seats are installed on the upper surface of the satellite module, with each locking seat corresponding to a locking bracket, and each locking seat is positioned directly below its corresponding locking bracket. Each strap covers the outer wall of the joint between the corresponding locking bracket and the locking seat. Two cable management devices are positioned opposite each other on one side of the bottom of the U-shaped frame of the turntable. Two locking release devices are positioned opposite each other on the other two sides of the bottom of the U-shaped frame of the turntable. The two cable management devices and the two locking release devices are all installed on the upper surface of the satellite module. The cable management devices, straps, and locking release devices are each connected by a locking rope. The U-shaped frame of the turntable is locked to the upper surface of the satellite module using four straps, two cable management devices, two locking release devices, and eight locking ropes.

[0010] In the aforementioned multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes, the locking and releasing device also includes four spring assemblies; the four spring assemblies are mounted on the satellite compartment plate, and the positions of the four spring assemblies correspond one-to-one with the positions of the four straps; one end of the spring assembly is connected to the satellite compartment plate, and the other end of the spring assembly is connected to the corresponding strap.

[0011] In the aforementioned multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes, the locking bracket has a right-angled trapezoidal cross-section, with the hypotenuse of the locking bracket located on the outer side; the locking seat has an inverted right-angled trapezoidal cross-section, with the hypotenuse of the locking seat located on the outer side; the hypotenuse of the locking bracket and the hypotenuse of the corresponding locking seat form a triangular shape.

[0012] In the aforementioned multi-point linkage locking and release device for a turntable based on segmented straps and ropes, a safety gap of not less than 5mm is provided between the locking bracket and the corresponding locking seat.

[0013] In the aforementioned multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes, the strap is a block structure with a V-shaped opening. During assembly, the V-shaped opening of the strap points horizontally to the docking point of the corresponding locking bracket and locking seat, so that the inclined side of the locking bracket and the inclined side of the locking seat form a triangle shape that is embedded in the V-shaped opening.

[0014] In the aforementioned multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes, the cable harness device adjusts and locks the tension of the locking rope; the magnitude of the locking rope tension determines the locking stiffness of the turntable's U-shaped frame.

[0015] In the aforementioned multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes, the locking and releasing device cuts the locking ropes, that is, it cuts the locking force closed loop formed by the eight locking ropes.

[0016] In the aforementioned multi-point linkage locking and release device for a turntable based on segmented straps and ropes, when the U-shaped frame of the turntable is locked, the tension of the locking rope is adjusted and locked by the harness device, and the spring assembly is in a stretched state.

[0017] In the aforementioned multi-point linkage locking and release device for a turntable based on segmented straps and ropes, when the U-shaped frame of the turntable is released, the locking rope is cut off by the locking and release device, breaking the locking force closed loop; under the action of the spring assembly's restoring force, the corresponding strap is pulled away from the U-shaped frame of the turntable, releasing the limit on the corresponding locking seat and locking bracket; thus realizing the unlocking and release of the U-shaped frame of the turntable, allowing the U-shaped frame of the turntable to rotate relative to the satellite cabin panel.

[0018] In the aforementioned multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes, the cable harness is used to guide and fix the locking rope. The height of both the cable harness and the locking and releasing device is lower than the locking bracket on the U-shaped frame of the turntable, ensuring that the unlocking does not interfere with the rotation of the U-shaped frame of the turntable.

[0019] The advantages of this invention compared to the prior art are:

[0020] (1) The two locking and releasing devices of the present invention can adjust and lock the rope tension. The magnitude of the rope tension will directly affect the rigidity of the turntable locking. The two wire harnesses are used to guide and fix the rope. The height of the wire harnesses and the locking and releasing devices is lower than the locking seat on the U-shaped frame, which can ensure that the U-shaped frame does not interfere with the rotation after unlocking.

[0021] (2) The present invention uses a high-strength rope system for locking, and the rope system is located below the rotation envelope of the turntable. Therefore, without the need to add a locking envelope, reliable separation of the turntable and avoidance after separation are achieved.

[0022] (3) The novel locking and releasing technology proposed in this invention has two locking and releasing devices that serve as backups for each other, which greatly improves the reliability of unlocking. At the same time, due to the introduction of the rope (the rope can change direction at will), the locking and releasing technology will not occupy too much envelope space.

[0023] (4) The present invention improves the reliability of unlocking, reduces the cost of locking, reduces the locking and unlocking envelope space, and also realizes the integrated design of unlocking and avoidance functions, which is a significant improvement. Attached Figure Description

[0024] Figure 1 This is a top view of the locking and releasing device of the present invention;

[0025] Figure 2 This is a side view of the opening angle of the locking and releasing device of the present invention;

[0026] Figure 3 This is a side view of the locking and releasing device of the present invention at an angle.

[0027] Figure 4 This is a schematic diagram showing the limiting of the strap on the locking seat and locking bracket of the present invention. Detailed Implementation

[0028] The present invention will be further described below with reference to the embodiments.

[0029] This invention provides a multi-point linkage locking and release device for a turntable based on segmented straps and rope systems, aiming to solve the locking problem of the U-shaped frame of a latitude and longitude ceremony turntable. Addressing the issues of low reliability, high cost, and large space occupation associated with both multi-point distributed locking and strap-type integrated locking schemes, this invention proposes a multi-point linkage locking and release technology based on a segmented strap and rope system structure. This technology inherits the advantage of small space occupation of multi-point distributed locking while simultaneously improving unlocking reliability and reducing locking costs.

[0030] A multi-point linkage locking and release device for a turntable based on segmented straps and rope systems, such as Figure 1-3 As shown, it specifically includes a satellite panel 1, 4 locking seats 2, 4 locking brackets 3, a turntable U-shaped frame 4, 4 straps 5, 2 cable ties 6, 2 locking release devices 7, and 8 locking ropes 8.

[0031] The satellite compartment panel 1 is placed horizontally; the U-shaped turntable frame 4 is positioned above the satellite compartment panel 1 with its opening facing upwards; a locking bracket 3 is installed at each of the four corners of the bottom of the U-shaped turntable frame 4; four locking seats 2 are installed on the upper surface of the satellite compartment panel 1, with the positions of the locking seats 2 corresponding one-to-one with the locking brackets 3, and each locking seat 2 is positioned directly below the corresponding locking bracket 3; each strap 5 covers the outer wall of the joint between the corresponding locking bracket 3 and the locking seat 2; two cable management devices 6 are positioned opposite each other on the turntable. Two locking and releasing devices 7 are located on the bottom two sides of the U-shaped frame 4; two cable ties 6 and two locking and releasing devices 7 are respectively installed on the upper surface of the satellite compartment panel 1; the cable ties 6, the straps 5, and the locking and releasing devices 7 are connected by a locking rope 8; the U-shaped frame 4 of the turntable is locked to the upper surface of the satellite compartment panel 1 by the four straps 5, the two cable ties 6, the two locking and releasing devices 7 and the eight locking ropes 8.

[0032] The locking and releasing device also includes four spring assemblies 9; the four spring assemblies 9 are mounted on the satellite compartment panel 1, and the positions of the four spring assemblies 9 correspond one-to-one with the positions of the four straps 5; one end of the spring assembly 9 is connected to the satellite compartment panel 1, and the other end of the spring assembly 9 is connected to the corresponding strap 5.

[0033] like Figure 4 As shown, the locking bracket 3 has a right-angled trapezoidal cross-section, with its hypotenuse positioned on the outer side; the locking seat 2 has an inverted right-angled trapezoidal cross-section, with its hypotenuse positioned on the outer side; the hypotenuse of the locking bracket 3 and the corresponding hypotenuse of the locking seat 2 form a triangle. Furthermore, to maintain a safe distance, a safety gap of not less than 5mm is provided between the locking bracket 3 and the corresponding locking seat 2. The strap 5 is a block structure with a V-shaped opening; during assembly, the V-shaped opening of the strap 5 points horizontally towards the mating point of the corresponding locking bracket 3 and locking seat 2, allowing the hypotenuse of the locking bracket 3 and the hypotenuse of the locking seat 2 to form a triangle that fits into the V-shaped opening.

[0034] In this invention, the cable harness 6 adjusts and locks the tension of the locking rope 8; the tension of the locking rope 8 determines the locking stiffness of the turntable U-shaped frame 4. The locking release device 7 cuts the locking rope 8, that is, it cuts the locking force closed loop formed by the eight locking ropes 8.

[0035] With the U-shaped frame 4 of the turntable locked, the cable harness device 6 adjusts and locks the tension of the locking rope 8, and the spring assembly 9 is in a stretched state.

[0036] When the turntable U-shaped frame 4 is released, the locking rope 8 is cut off by the locking release device 7, thus breaking the locking force closed loop; under the action of the spring assembly 9's reset force, the corresponding strap 5 is pulled away from the turntable U-shaped frame 4, releasing the limit on the corresponding locking seat 2 and locking bracket 3; thus realizing the unlocking and release of the turntable U-shaped frame 4, and enabling the turntable U-shaped frame 4 to rotate relative to the satellite cabin panel 1.

[0037] The cable harness 6 in this invention is used to guide and fix the locking rope 8. The height of the cable harness 6 is lower than the locking bracket 3 on the turntable U-shaped frame 4, ensuring that it does not interfere with the rotation of the turntable U-shaped frame 4 after unlocking.

[0038] When locking, there is a safety gap of more than 5mm between the four locking seats and the U-shaped frame of the turntable. The strap engages with the locking seats and the locked end of the U-shaped frame at the four locking seats. The engagement principle of the strap locking is as follows: Figure 4 As shown, eight high-strength locking ropes connect the four straps end to end, forming a force closed loop. The rope tension can be adjusted and locked at the locking seat 2 and locking release device 7; the rope tension directly affects the rigidity of the turntable lock. Two rope harnesses are used to guide and fix the ropes. The rope harnesses are lower than the locking seats on the U-shaped frame, ensuring that they do not interfere with the rotation of the U-shaped frame after unlocking.

[0039] Upon release, the tension on the entire rope system is released as soon as either of the two locking release devices is activated. At this point, the straps open and separate away from the turntable under the pull of the four spring assemblies, creating a 5mm separation gap between the turntable U-shaped frame and the base. Because a high-strength rope system is used for locking, and all ropes are located below the turntable's rotation envelope, reliable turntable separation and subsequent obstacle avoidance are achieved without the need for an additional locking envelope.

[0040] The novel locking and releasing technology proposed in this invention features two locking and releasing devices that serve as backups for each other, significantly improving unlocking reliability. Furthermore, due to the introduction of a rope (which can change direction at will), this locking and releasing technology does not occupy excessive envelope space.

[0041] Compared with existing technologies, this invention improves unlocking reliability, reduces locking costs, and decreases the locking and unlocking envelope space. It also achieves an integrated design of unlocking and obstacle avoidance functions, representing a significant advancement.

[0042] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes, characterized in that: It includes a satellite panel (1), 4 locking seats (2), 4 locking brackets (3), a turntable U-shaped frame (4), 4 straps (5), 2 cable ties (6), 2 locking release devices (7) and 8 locking ropes (8). Among them, the satellite compartment panel (1) is placed horizontally; the U-shaped frame of the turntable (4) is set above the satellite compartment panel (1) with its opening facing upward; a locking bracket (3) is set at each of the four corners of the bottom of the U-shaped frame of the turntable (4); four locking seats (2) are installed on the upper surface of the satellite compartment panel (1), and the positions of the locking seats (2) correspond one-to-one with the locking brackets (3), with each locking seat (2) set directly below the corresponding locking bracket (3); each strap (5) covers the outer wall of the joint between the corresponding locking bracket (3) and the locking seat (2); two wire harnesses (6) are set opposite to each other on one side of the bottom end of the U-shaped frame of the turntable (4); two locking release devices (7) are set opposite to each other on the other side of the bottom end of the U-shaped frame of the turntable (4); the two wire harnesses (6) and the two locking release devices (7) are all installed on the satellite compartment panel (1). The upper surface of the turntable U-shaped frame (4) is connected by a locking rope (8) to the cable tie (6), the strap (5), and the locking release device (7). The turntable U-shaped frame (4) is locked to the upper surface of the satellite cabin (1) by the four straps (5), two cable ties (6), two locking release devices (7) and eight locking ropes (8). The locking release device also includes four spring assemblies (9). When the turntable U-shaped frame (4) is released, the locking rope (8) is cut by the locking release device (7), and the locking force loop is cut off. Under the action of the spring assembly (9) reset force, the corresponding strap (5) is pulled away from the turntable U-shaped frame (4), and the limit on the corresponding locking seat (2) and locking bracket (3) is released. The turntable U-shaped frame (4) is unlocked and released, and the turntable U-shaped frame (4) rotates relative to the satellite cabin (1).

2. The multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes as described in claim 1, characterized in that: Four spring assemblies (9) are installed on the satellite module (1), and the positions of the four spring assemblies (9) correspond one-to-one with the positions of the four straps (5); one end of the spring assembly (9) is connected to the satellite module (1), and the other end of the spring assembly (9) is connected to the corresponding strap (5).

3. The multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes according to claim 2, characterized in that: The locking bracket (3) has a right-angled trapezoidal cross section, and the hypotenuse of the locking bracket (3) is located on the outside; the locking seat (2) has an inverted right-angled trapezoidal cross section, and the hypotenuse of the locking seat (2) is located on the outside; the hypotenuse of the locking bracket (3) and the hypotenuse of the corresponding locking seat (2) form a triangular shape.

4. A multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes as described in claim 3, characterized in that: A safety gap of not less than 5mm is provided between the locking bracket (3) and the corresponding locking seat (2).

5. A multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes as described in claim 3, characterized in that: The strap (5) is a block structure with a V-shaped opening; during assembly, the V-shaped opening of the strap (5) points horizontally to the docking point of the corresponding locking bracket (3) and locking seat (2), so that the hypotenuse of the locking bracket (3) and the hypotenuse of the locking seat (2) form a triangle shape that is embedded in the V-shaped opening.

6. A multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes according to claim 3, characterized in that: The cable harness (6) adjusts and locks the tension of the locking rope (8); the magnitude of the tension of the locking rope (8) determines the locking stiffness of the turntable U-shaped frame (4).

7. A multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes according to claim 3, characterized in that: The locking release device (7) cuts the locking rope (8), that is, it cuts the locking force closed loop formed by the 8 locking ropes (8).

8. A multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes according to claim 7, characterized in that: When the U-shaped frame (4) of the turntable is locked, the cable harness (6) adjusts and locks the tension of the locking rope (8), and the spring assembly (9) is in a stretched state.

9. A multi-point linkage locking and releasing device for a turntable based on segmented straps and ropes as described in claim 8, characterized in that: The cable harness (6) is used to guide and fix the locking rope (8). The height of the cable harness (6) and the locking release device (7) is lower than the locking bracket (3) on the turntable U-shaped frame (4), ensuring that the rotation of the turntable U-shaped frame (4) is not interfered with after unlocking.

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