Segmented extension mechanism compression restraint device

Abstract

The present invention provides a compression and restraining device for a segmented extension mechanism, comprising: N-level segments, a first compression assembly, a second compression assembly, a third compression assembly, a separation nut, and a restraining device. The first-level segment is tightly connected to the aircraft body, one end of the first compression assembly is mounted on the upper frame of the K-level segment, one end of the second compression assembly is mounted on the upper frame of the L-level segment, and one end of the third compression assembly is mounted on the upper frame of the N-level segment, wherein K is a natural number greater than 1 and less than L, L is a natural number greater than K and less than N, and N is a natural number greater than or equal to 3. The other ends of the first compression assembly, the second compression assembly, and the third compression assembly are tightly connected via a separation nut. The restraining device is respectively arranged between the lower frame and the upper frame corresponding to each segment. The present invention can achieve reliable restraint between the segments of each level when a large segmented extension mechanism is in a collapsed state, has a strong load-bearing capacity, and can be automatically released.

Description

Technical Field

[0001] The present invention relates to the technical field of space extension mechanisms, and in particular to a segmented extension mechanism compression and restraint device. Background Art

[0002] With the continuous development and progress in the fields of space security and deep space exploration, the application prospects of space segmented extension mechanisms are becoming increasingly broad.

[0003] At present, the segmented extension mechanism is mostly a grid tube or truss structure, which has the characteristics of strong load-bearing capacity, high deployment stiffness, and good environmental adaptability.

[0004] However, this type of extension mechanism has many segments and is large in size and weight, so the response of its active section is relatively large. How to achieve reliable compression constraint in the retracted state is a major difficulty. Summary of the Invention

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a segmented extension mechanism compression and restraint device.

[0006] An embodiment of the present application provides a segmented extension mechanism clamping and restraining device, comprising: N-level segments, a first clamping assembly, a second clamping assembly, a third clamping assembly, a separation nut, and a restraining device, wherein the first-level segment is fastened to the aircraft body, one end of the first clamping assembly is installed at the upper frame position of the K-level segment, one end of the second clamping assembly is installed at the upper frame position of the L-level segment, and one end of the third clamping assembly is installed at the upper frame position of the N-level segment, wherein K is a natural number greater than 1 and less than L, L is a natural number greater than K and less than N, and N is a natural number greater than or equal to 3, the other end of the first clamping assembly, the other end of the second clamping assembly, and the other end of the third clamping assembly are fastened together by the separation nut; the restraining device is respectively arranged between the lower frame and the upper frame corresponding to each segment.

[0007] Optionally, the first clamping assembly, the second clamping assembly, and the third clamping assembly all include: a clamping bracket, a locking nut, and a clamping support sleeve, the locking nut and the clamping support sleeve are located at the first end of the clamping bracket, the first end of the clamping bracket is fastened to the separation nut through the locking nut and the clamping support sleeve, and the second end of the clamping bracket is connected to the upper frame of the corresponding segment.

[0008] Optionally, the third clamping assembly further includes: a clamping top sleeve, the clamping top sleeve is located at the first end of the clamping bracket, and the clamping bracket is fastened to the clamping rod installed on the separation nut through the clamping top sleeve.

[0009] Optionally, the top of the clamping support sleeve is provided with a frustum, the bottom of the clamping support sleeve and the bottom of the clamping top sleeve are provided with a concave conical surface, and the first clamping assembly, the second clamping assembly, and the third clamping assembly are stacked together through the upper frustum conical surfaces of the clamping support sleeve and the clamping top sleeve.

[0010] Optionally, a frustum is provided on the top of the separation nut, and the first clamping assembly, the second clamping assembly, the third clamping assembly and the separation nut are stacked in the form of a frustum and a concave cone, and the clamping rod passes through the clamping support sleeve and the clamping top sleeve and is connected to the internal thread of the separation nut.

[0011] Optionally, outer surfaces of the frustum of the pressing support sleeve and the frustum of the separation nut are plated with a WC film.

[0012] Optionally, the first clamping assembly, the second clamping assembly, and the third clamping assembly limit the relative stretching movement between the segments by maintaining a clamping state.

[0013] Optionally, the restraint device includes: an A limit bracket and a B limit bracket, the A limit bracket is installed on the upper frame and lower frame of the 1st to N-1th level segments, and the B limit bracket is installed on the upper frame and lower frame of the 2nd to Nth level segments, and the restraint device is used to control the restraint limit between two adjacent levels of segments.

[0014] Optionally, the A limiting bracket and the B limiting bracket realize constraint limiting by matching the frustum and the inner conical surface.

[0015] Optionally, when the spacecraft enters orbit, the separation nut is detonated to release the compression constraint, and each segment can extend without restriction.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The segmented extension mechanism compression and restraint device provided by the present invention is applicable to various segmented extension mechanisms. This device reliably restrains the segments of a large segmented extension mechanism when it is collapsed, and compresses the entire mechanism against the vehicle body, thereby withstanding the severe mechanical loads of the active segment without structural damage. After entering orbit, the device automatically releases, releasing the mechanism's compression. This device offers advantages such as reliable compression, strong load-bearing capacity, and automatic release. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without inventive work. Other features, purposes and advantages of the present invention will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings:

[0019] Figure 1 A schematic structural diagram of a segmented extension mechanism compression and restraint device provided in an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the layout of a segmented extension mechanism compression and restraint device provided in an embodiment of the present invention;

[0021] Figure 3 Schematic diagram of the structure of the second pressing assembly of the segmented extension mechanism pressing and restraining device in an embodiment of the present invention;

[0022] Figure 4 Schematic diagram of the structure of the third pressing assembly of the segmented extension mechanism pressing and restraining device in an embodiment of the present invention;

[0023] Figure 5 Schematic diagram of the structure of the compression bracket of the segmented extension mechanism compression restraint device in an embodiment of the present invention;

[0024] FIG6 (a) is a schematic structural diagram of a compression support sleeve of a compression restraining device of a segmented extension mechanism according to an embodiment of the present invention;

[0025] FIG6 (b) is a schematic structural diagram of a tightening top sleeve of a segmented stretching mechanism compressing and restraining device according to an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the installation of a pressing assembly and a separating nut of a pressing and restraining device of a segmented extension mechanism in an embodiment of the present invention;

[0027] Figure 8 Schematic diagram of the structure of the restraint device of the segmented extension mechanism pressing the restraint device in an embodiment of the present invention;

[0028] Figure 9 Schematic diagram of the installation structure of the restraint device of the segmented extension mechanism pressing restraint device in an embodiment of the present invention.

[0029] In the picture:

[0030] 1-first pressing assembly, 2-second pressing assembly, 21-pressing bracket, 22-locking nut, 23-pressing support sleeve, 3-third pressing assembly, 31-pressing top sleeve, 4-separation nut, 5-restraint device, 51-A limiting bracket, 52-B limiting bracket. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several variations and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the term "connected" can be used for both fixing and circuit connection.

[0033] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0035] A segmented extension mechanism compression and restraint device provided in an embodiment of the present invention may include: a first compression assembly, a second compression assembly, a third compression assembly, a separation nut, and a restraint device. The second compression assembly is composed of a compression bracket, a locking nut, and a compression support sleeve. The second compression assembly and the third compression assembly are identical in composition, differing only in the size of the compression bracket. In addition to the different size of the compression bracket, the third compression assembly (top compression assembly) requires the installation of a compression rod, and therefore a compression top sleeve. The restraint device includes a limit bracket A and a limit bracket B.

[0036] This embodiment is applicable to various types of segmented extension mechanisms, can achieve reliable constraints between the segments of a large segmented extension mechanism when it is in a folded state, and can press the entire mechanism against the aircraft body.

[0037] For example, the compression and restraint devices in this embodiment are arranged circumferentially. Taking the truss-type extension mechanism as an example, the compression and restraint devices are installed in all four directions. This arrangement achieves good symmetry and enhances the reliability of compression and restraint. Furthermore, the restraint devices are installed on both the upper and lower frames of each stage. Since the compression devices are large and heavy, their installation locations are spaced apart according to lightweight design principles.

[0038] For example, in this embodiment, a WC film is plated on the outer circumferential surface of the compression support sleeve and the top cone of the separation nut to increase the friction coefficient and ensure the reliability of the compression.

[0039] For example, the restraint device in this embodiment realizes restraint by combining a frustum and an inner conical surface. This restraint method can not only restrict the axial relative downward movement between the segments of the mechanism, but also restrict the radial relative movement.

[0040] For example, in this embodiment, a separating nut is used as a clamping and releasing device, and after entering the track, the separating nut is unlocked by remote control or manually. In addition to reliable clamping, this clamping and releasing device also has the advantage of synchronous unlocking.

[0041] The following is a detailed description of the segmented extension mechanism compression and restraint device provided by the present invention in conjunction with the accompanying drawings and specific embodiments.

[0042] Figure 1 A schematic structural diagram of a segmented extension mechanism compression restraint device provided by an embodiment of the present invention is shown in FIG. Figure 1 As shown, the device in this embodiment may include: a first pressing assembly 1, a second pressing assembly 2, a third pressing assembly, a separation nut 4, and a restraining device 5.

[0043] Figure 2 A schematic diagram of the layout of a segmented extension mechanism compression restraint device provided in an embodiment of the present invention is shown in FIG. Figure 2 As shown, the compression and restraint devices of the segmented extension mechanism in this embodiment are arranged in four quadrants of the mechanism. The segmented extension mechanism is divided into six levels, with the first level being the foundational level, used for secure connection to the aircraft body. The restraint devices are respectively arranged between the lower and upper frames of the first and second levels, the second and third levels, the third and fourth levels, the fourth and fifth levels, and the fifth and sixth levels.

[0044] See also Figure 1 、 Figure 2As shown, the first clamping assembly 1 is installed on the upper frame of the second-level segment, the second clamping assembly 2 is installed on the upper frame of the fourth-level segment, and the third clamping assembly 3 is installed on the upper frame of the sixth-level segment. The clamping device and the restraining device are installed in all four directions of the mechanism.

[0045] It should be noted that this embodiment is described using a six-stage extension mechanism as an example, but this embodiment does not limit the specific number of segments. Those skilled in the art can apply the segmented extension mechanism compression and restraint device of this application to an extension mechanism with any number of segments as needed.

[0046] Exemplarily, in an extension mechanism comprising N stages, the first stage segment can be fastened to the aircraft body, one end of the first clamping assembly is installed at the upper frame position of the K-th stage segment, one end of the second clamping assembly is installed at the upper frame position of the L-th stage segment, and one end of the third clamping assembly is installed at the upper frame position of the N-th stage segment, wherein K is a natural number greater than 1 and less than L, L is a natural number greater than K and less than N, and N is a natural number greater than or equal to 3, and the other end of the first clamping assembly, the other end of the second clamping assembly, and the other end of the third clamping assembly are fastened together by separating nuts; the restraint devices are respectively arranged between the lower frame and the upper frame corresponding to each stage.

[0047] It should be noted that the present application does not limit the number of clamping components. In actual applications, those skilled in the art can set up more clamping components based on the embodiments provided in the present application, and connect them with the various segments of the extension mechanism to achieve more precise clamping and constraint control.

[0048] Figure 3 FIG. 1 is a structural diagram of the second pressing assembly of the segmented extension mechanism pressing and restraining device according to an embodiment of the present invention. Figure 3 As shown, the second clamping assembly 2 may include: a clamping bracket 21, a locking nut 22 and a clamping support sleeve 23. It should be noted that the first clamping assembly 1 also includes the same structure as the second clamping assembly 2. Depending on the installation position, the size of the clamping bracket of the first clamping assembly is different.

[0049] Figure 4 FIG. 1 is a structural diagram of the third pressing assembly of the segmented extension mechanism pressing and restraining device according to an embodiment of the present invention. Figure 4 As shown, in addition to having a structure similar to that of the second pressing assembly, the third pressing assembly 3 also includes a pressing top sleeve 31 because it needs to be installed with a pressing rod.

[0050] See also Figure 1 、 Figure 3 、 Figure 4 The compression support sleeve 23 and the compression top sleeve 31 are tightened by the locking nut 22 to fix them to the compression bracket.

[0051] Figure 5 FIG. 1 is a structural diagram of a compression bracket of a segmented extension mechanism compression restraint device according to an embodiment of the present invention. Figure 5 As shown, the shape of the clamping bracket is approximately trapezoidal, and the root is connected to the upper frame, providing an installation interface with the truss. It is relatively wide, and a clamping support sleeve (or clamping top sleeve) is installed at the other end. The clamping bracket has a hollow weight-reducing groove and a wall thickness of 8mm.

[0052] Figure 6(a) is a schematic diagram of the structure of the compression support sleeve of the compression and restraining device for a segmented extension mechanism according to an embodiment of the present invention; Figure 6(b) is a schematic diagram of the structure of the clamping top sleeve of the compression and restraining device for a segmented extension mechanism according to an embodiment of the present invention. As shown in Figures 6(a) and 6(b), the top of the compression support sleeve is provided with a frustum, and the bottoms of the compression support sleeve and the bottoms of the compression top sleeve have concave conical surfaces. The first compression assembly 1, the second compression assembly 2, and the third compression assembly 3 are stacked and assembled together, relying on the frustum surfaces of the compression support sleeve and the compression top sleeve. The outer surface of the frustum is coated with a WC film to enhance friction at the compression sleeve joint.

[0053] Figure 7 FIG. 1 is a schematic diagram of the installation of the pressing assembly and the separating nut of the segmented extension mechanism pressing and restraining device according to an embodiment of the present invention. Figure 7 As shown, there is a cone at the top of the separation nut, so the first clamping assembly, the second clamping assembly, and the third clamping assembly are stacked with the separation nut through the combination of the cone and the concave cone, and then the M14 clamping rod is used to pass through the clamping support sleeve and the clamping top sleeve and screwed into the separation nut to achieve the clamping of the three sets of clamping assemblies, and the applied clamping force is 30KN.

[0054] Figure 8 FIG. 1 is a structural diagram of a restraining device of a segmented extension mechanism pressing a restraining device in an embodiment of the present invention. Figure 8 As shown, the restraint device 5 comprises a position-limiting bracket A 52 and a position-limiting bracket B 51. Within the same restraint device, the position-limiting brackets A and B differ in their mounting locations: the B position-limiting bracket is mounted on the upper segment, while the A position-limiting bracket is mounted on the lower segment. The restraint device utilizes a frustum and an inner conical surface to achieve positional restraint. The primary function of the restraint device is to limit the relative downward movement between the various segments of the mechanism.

[0055] Figure 9This is a schematic diagram of the installation structure of the restraint device of the segmented extension mechanism compression restraint device in the embodiment of the present invention. Specifically, this embodiment illustrates the compression restraint function, taking the six-level truss extension mechanism as an example, the first-level truss is the basic level, and is fixedly connected to the aircraft body. For the first and second-level segments, the A limit bracket in the restraint device is installed in four directions of the upper frame and lower frame of the first-level truss, and the corresponding B limit bracket is installed in four directions of the upper frame and lower frame of the second-level truss, for a total of eight groups; similarly, for the second and third-level segments, the A limit bracket in the restraint device is installed in four directions of the upper frame and lower frame of the second-level truss, and the corresponding B limit bracket is installed in four directions of the upper frame and lower frame of the third-level truss, for a total of eight groups. For the restraint device, the remaining levels are the same, so the six-level truss extension mechanism is equipped with a total of 40 groups of restraint components, and the installation diagram is as shown below. Figure 9 As shown, the installation of the constraint assembly restricts the relative axial downward movement and radial movement between the various levels of the mechanism. There are 4 sets of the first clamping assembly, which are installed on the second-level segmented upper frame, 4 sets of the second clamping assembly, which are installed on the fourth-level segmented upper frame, and 4 sets of the third clamping assembly, which are installed on the sixth-level segmented upper frame. Figure 1 As shown, after the clamping assembly is installed, the clamping rod is tightened to restrict the relative axial upward movement between the various levels of the mechanism. The clamping assembly and the constraint assembly work together to achieve the clamping constraint of the mechanism. The device has the characteristics of light weight and reliable clamping. The installation method has the characteristics of symmetrical force and good stability of the mechanism.

[0056] When the spacecraft enters orbit, the separation nut detonates, releasing the constraint on the clamping rod. At this time, the movement of the extension direction of each segment of the extension mechanism is no longer restricted and can be smoothly extended under the action of the drive device.

[0057] Optionally, after the spacecraft enters orbit, the separation nut is unlocked according to program control or remote control detonation, and then the extension mechanism can be deployed under the action of the drive device. This unlocking method has the advantage of synchronous unlocking.

[0058] The above is the core idea of the present invention. In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0059] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the present invention. Various modifications to these embodiments will be apparent to professionals and technicians in this field, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0060] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various variations or modifications within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A segmented extension mechanism compression restraint device, characterized in that: include: N-level segments, a first clamping assembly, a second clamping assembly, a third clamping assembly, a separation nut, and a restraint device, the first-level segment is fastened to the aircraft body, one end of the first clamping assembly is installed at the upper frame position of the K-level segment, one end of the second clamping assembly is installed at the upper frame position of the L-level segment, and one end of the third clamping assembly is installed at the upper frame position of the N-level segment, wherein K is a natural number greater than 1 and less than L, L is a natural number greater than K and less than N, and N is a natural number greater than 3, the other end of the first clamping assembly, the other end of the second clamping assembly, and the other end of the third clamping assembly are fastened together by the separation nut; the restraint device is respectively arranged at the corresponding ends of each segment between the lower frame and the upper frame; the first clamping assembly, the second clamping assembly and the third clamping assembly all include: a clamping bracket, a locking nut and a clamping support sleeve, the locking nut and the clamping support sleeve are located at the first end of the clamping bracket, the first end of the clamping bracket is fastened to the separation nut through the locking nut and the clamping support sleeve, and the second end of the clamping bracket is connected to the upper frame of the corresponding segment; the restraint device includes: an A limit bracket and a B limit bracket, the A limit bracket is installed on the upper frame and lower frame of the 1st to N-1th level segments, and the B limit bracket is installed on the upper frame and lower frame of the 2nd to Nth level segments, and the restraint device is used to control the restraint limit between two adjacent levels of segments.

2. The segmented extension mechanism compression restraint device according to claim 1, characterized in that: The third pressing assembly further includes a pressing top sleeve, which is located at the first end of the pressing bracket, and the pressing bracket is fastened to the pressing rod installed on the separation nut through the pressing top sleeve.

3. The segmented extension mechanism compression restraint device according to claim 2, characterized in that: The top of the clamping support sleeve is provided with a frustum, and the bottom of the clamping support sleeve and the bottom of the clamping top sleeve are provided with a concave conical surface. The first clamping assembly, the second clamping assembly, and the third clamping assembly are stacked together through the upper frustum conical surfaces of the clamping support sleeve and the clamping top sleeve.

4. The segmented extension mechanism compression restraint device according to claim 2, characterized in that: A frustum is provided at the top of the separation nut, and the first clamping assembly, the second clamping assembly, the third clamping assembly and the separation nut are stacked in the form of a frustum and a concave cone. The clamping rod passes through the clamping support sleeve and the clamping top sleeve and is connected to the internal thread of the separation nut.

5. The segmented extension mechanism compression restraint device according to claim 4, characterized in that: The outer surfaces of the frustum of the pressing support sleeve and the frustum of the separation nut are plated with a WC film.

6. The segmented extension mechanism compression restraint device according to claim 2, characterized in that: The first pressing assembly, the second pressing assembly, and the third pressing assembly limit the relative stretching movement between the segments by maintaining a pressing state.

7. The segmented extension mechanism compression restraint device according to claim 1, characterized in that: The A limit bracket and the B limit bracket realize constraint limitation by cooperating with the frustum and the inner cone.

8. The segmented extension mechanism compression restraint device according to any one of claims 1 to 6, characterized in that: When the spacecraft enters orbit, the separation nut is triggered to release the compression constraint, and each segment can extend without restriction.

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