Cable mounting device for folding and unfolding framework

Abstract

The invention discloses a cable mounting device with a folding and unfolding framework. The cable mounting device comprises a fixed base, an insulating pad, a gland and a rotary buckle, the fixed base provides a curved surface connected with a framework and a binding groove and is an external interface of the device. The insulation pad and the gland are attached through the groove, and a limiting measure is taken, so that an insulation protection effect is achieved. The gland is connected with the fixed base through two ends, one end is of a bolt type structure, and the other end is connected through a screw. The rotary buckle is provided with a limiting pin, is connected with the gland through a screw and can rotate by a certain angle along the axis of the screw, the torsion stress of the cable is released in the folding and unfolding process of the rod piece, and the cable is prevented from being damaged. According to the invention, a set of mounting device is adopted, the fixation of a flat cable and a round cable is realized, the cable can be folded and folded along with the framework, the path of the cable is controllable and the stress is minimum in the moving process, the problem of cable winding and hooking is effectively solved, and the reliability of the system is obviously improved.

Description

Technical Field

[0001] This invention relates to a folding and unfolding frame cable installation device, belonging to the field of spacecraft overall technology. Background Technology

[0002] The 60-meter-long support arm frame structure can be retracted and deployed. The support arm consists of 86 cubic units, with the cube edges using 15mm diameter annular cross-section members and a spacing of 700mm between the units. Cables run through the cubic units from the 60-meter beginning to the end. These cables are of two types: one for power transmission (flat, flexible, and easily bent); and the other for signal transmission (circular, non-bending). The cables retract and deploy with the cubic units. The transmitting cable folds along with the structure onto the satellite body, and after orbit insertion, it deploys with the structure, achieving a deployment-to-retraction ratio of over 60 times. In the retracted state, the flat cable is folded in a "W" shape on the structure, while the circular cable is coiled in a "double S" shape. The "W" fold requires securing and compressing the cable, while the "double S" coiling requires compressing the three-dimensional S-shaped cable into a two-dimensional S-shape, requiring the cable to be fixed while still allowing rotation around an axis.

[0003] Similar designs were used in overseas SRTM projects. The cable installation device consisted of a handle-like part with notches on both sides, which matched a round rod. After inserting the rod, a long screw was used to lock the notches in place. This type of cable fixing device lacked insulation protection, posing a risk of short circuits. Furthermore, the screw exerted pressure on the rod as it tightened the notches, which could easily damage the rod. Summary of the Invention

[0004] The technical problem solved by this invention is to overcome the shortcomings of the prior art and propose a folding and unfolding frame cable installation device, which solves the technical problems of reliable cable fixing, effective insulation and rapid installation.

[0005] The technical solution of the present invention is: a folding and unfolding frame cable installation device, comprising: a fixed base, an insulating pad, a pressure cap, and a rotating buckle; The fixed base is designed with an external mounting cylindrical interface and pre-drilled binding grooves at both ends; the insulating pad is embedded inside the pressure cover to provide insulation; the pressure cover is installed on the fixed base; the rotating buckle is installed on the pressure cover by screws and can rotate around the axis of the screws, which serves to fix and release the degree of rotational freedom and limit the movement.

[0006] The bottom surface of the fixed base is provided with a cylindrical surface for cooperating with external rods, and for bonding with the cylindrical rods of the external rods.

[0007] The fixed base is made of polyimide insulating material; the cylindrical surface and the cylindrical rod are bonded together with silicone rubber.

[0008] The base has grooves at both ends, and Kevlar ropes are used to secure the grooves to the cylindrical rod for fixation.

[0009] One end of the fixed base is a door-hole type limiting hole for fixing the cap with a pin; the other end is a threaded hole for fixing the cap with a screw.

[0010] The cover includes a snap-fit ​​body for crimping the cable, with a pin at one end and a screw mounting hole at the other end; the flat cable is crimped and fixed between the insulating pad and the fixed base by inserting the pin into the door-hole type limiting hole and locking the fastening screw into the screw mounting hole.

[0011] The pressure cap is made of a semi-cylindrical aluminum alloy part; a cylindrical groove is cut into the top of the pressure cap to provide a rotation limit boundary for the rotating buckle.

[0012] The rotating buckle is installed on the threaded hole in the center of the cover by screws, and is used to accommodate the cable and release the torsional stress generated during its movement.

[0013] The bottom of the rotating buckle is equipped with a cylindrical limiting device, which moves inside the slot. The angle of rotation of the rotating buckle around the axis of the screw is between 0° and 45°.

[0014] The rotating buckle is dumbbell-shaped, with dumbbell-shaped supports at both ends for securing the cable.

[0015] The beneficial effects of this invention are: 1) The cylindrical surface of the fixed base is precisely fitted to the surface of the rod. The dual fixing scheme of adhesive bonding and rope binding is adopted to achieve reliable fixing of multiple degrees of freedom without damaging the rod.

[0016] 2) An insulating pad design was adopted to completely isolate the carbon fiber rods and metal caps from the short-circuit path of the positive and negative wires in the power cable.

[0017] 3) The pressure cap is installed using a combination of pins and screws, which is easy to operate and allows for quick installation.

[0018] 4) The cap has a semi-circular cross-section, with the arc portion fitting the cable surface to prevent the cable from bending sharply when folded. The hollow structure in the flat portion reduces weight and also provides a limiting groove for the rotating buckle.

[0019] 5) The rotating buckle adopts a design that allows for both rotation and angle limitation, which can adapt to the requirements of cable rotation.

[0020] 6) The entire device is lightweight. The 60-meter support arm device uses 344 units, each weighing 20g, with a total weight of only 7kg, which can effectively reduce the system weight. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the device of the present invention.

[0022] Figure 2 Schematic diagram of cable installation Figure 3 For the structural diagram of the fixed base Figure 4 Diagram of the gland structure Figure 5 Diagram of the rotating snap-fit ​​structure Figure 6 Image showing the effect after cable installation. Detailed Implementation like Figure 1 As shown, the present invention provides a folding and unfolding frame cable installation device. It includes: a fixed base 1, an insulating pad 2, a pressure cap 3, and a rotating buckle 4; like Figure 2 As shown, the fixed base 1 is designed with an external mounting cylindrical interface and pre-reserved binding grooves at both ends; the insulating pad 2 is embedded inside the pressure cover 3 to provide insulation; the pressure cover 3 is installed on the fixed base 1; the rotating buckle 4 is installed on the pressure cover 3 by screws 5, and can rotate around the axis of screws 5 to fix and release the degree of rotational freedom and limit the position.

[0023] The bottom surface of the fixed base 1 is provided with a cylindrical surface 11 for cooperating with external rods, and for bonding with the cylindrical rod 100 of the external rods.

[0024] The fixed base 1 is made of polyimide insulating material; the cylindrical surface 11 and the cylindrical rod 100 are bonded together with silicone rubber.

[0025] The fixed base 1 has grooves 13 at both ends, and is fixed by wrapping Kevlar rope tightly around the grooves 13 and the cylindrical rod 100.

[0026] like Figure 3 The diagram shows the structure of the fixed base. One end of the fixed base 1 is a door-shaped limiting hole 12 for fixing the cover 3 with a pin; the other end is a threaded hole 14 for fixing the cover 3 with a screw.

[0027] like Figure 4 The diagram shows the structure of the pressure cap 3, which includes a snap-fit ​​body for crimping the cable. One end is provided with the pin 21, the other end is provided with a screw mounting hole 24, and the middle plane is provided with the threaded hole 25. The flat cable is crimped and fixed between the insulating pad 2 and the fixed base 1 by inserting the pin 21 into the door-type limiting hole 12 and locking the fastening screw 5 into the screw mounting hole 24.

[0028] The pressure cap 3 is made of semi-cylindrical aluminum alloy parts; the top of the pressure cap has a cylindrical groove 22, which provides a rotation limit boundary for the rotating buckle 4.

[0029] The rotating buckle 4 is installed on the threaded hole 25 in the center of the pressure cover 3 by screws 5, and is used to accommodate the cable and release the torsional stress generated during its movement.

[0030] The bottom of the rotating buckle 4 is equipped with a cylindrical limiting device 42, which moves inside the slot 22. The angle of rotation of the rotating buckle 4 around the axis of the screw 5 is between 0° and 45°.

[0031] The rotating buckle 4 is dumbbell-shaped, and the dumbbell-shaped supports 41 at both ends are used for bundling and fixing the cable.

[0032] like Figure 6 The diagram shows an embodiment of the present invention. The device includes a fixed base for connecting to a circular rod, an insulating pad for preventing short circuits between the positive and negative wires of the cable, a metal cap for accommodating and pressing the cable, a rotating buckle connected to the cap and screwed together for fixing the circular cable and for releasing rotational freedom and limiting rotation during the unfolding of the frame, and two fastening screws for fixing the cap and the rotating buckle respectively.

[0033] The mounting base is made of polyimide insulation material with a cylindrical surface that perfectly matches the round rod, providing a tight fit for installation and also serving as insulation. The cylindrical surface is bonded to the rod with silicone rubber, and two grooves are provided at both ends of the mounting base for securing with Kevlar rope, achieving a double-fastening effect. The silicone rubber primarily resists torsion and axial slippage, while the Kevlar rope provides radial restraint. The mounting base has two pre-drilled interfaces for the pressure cap: one is a door-hole type limiting hole, and the other is a threaded hole. This allows for quick installation of the pressure cap.

[0034] An insulating pad is embedded between the fixed base and the cover to form a safety insulating pad between the cover and the cable.

[0035] The pressure cap is a semi-cylindrical aluminum alloy part, which effectively improves clamping rigidity. Both ends of the pressure cap are fitted with fixing bases; one side uses a pin-type design, and the other side uses a round hole design. During cable installation, the pressure cap pin can be quickly inserted into the limiting hole, and the other side is fixed with a short screw. The gap between the pressure cap and the fixing base is designed to match the cable thickness, with a negative tolerance, to ensure the cable is clamped in place. A threaded hole is provided in the center of the pressure cap for rotating snap-fit ​​installation. Excess material in the center of the top of the pressure cap is removed, effectively improving clamping rigidity.

[0036] like Figure 5 The diagram shows the structure of the rotating clip. Located in the center of the pressure cap, the dumbbell-shaped clip provides a position for cable bundling. A raised cylindrical pin is designed on the lower part of the clip's contact surface to act as a limit. This ensures that during cable winding, the clip rotates within a permissible range around its axis.

[0037] Two fastening screws are used to secure the gland and the rotating clip, respectively. The screw lengths are determined by the part size and are available in two specifications: M4×5mm and M3×6mm. The rotating clip screws are countersunk Phillips head screws with thread-locking adhesive. Tighten and then back off half a turn to reduce rotational resistance.

[0038] Assembly and working process First, mark the positions on the frame members. Apply adhesive to the cylindrical surface where the fixing base contacts the member and attach it to the marked position on the member. Then, secure it with Kevlar straps. Lay the flat cable in the U-shaped groove in the middle of the convex surface above the fixing base. Then, place one end of the pressure cap into the door-hole-type limiting hole of the fixing base, and connect the other end to the fixing base with screws. Next, fix the rotating buckle according to the direction of the round cable, so that its limiting device falls inside the pressure cap. Secure the round cable to the rotating buckle with cable tie. When the frame structure is retracted, the flat cable folds along the herringbone crease in the middle, while the round cable freely coils inside the frame as it rotates. When the frame structure is extended, the cables unfold in reverse order, thus achieving reliable cable fixation and unfolding follow-up.

[0039] 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 based on the above-disclosed technical content without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and modifications 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 folded-deployed architecture cable installation device, characterized by, include: Fixed base (1), insulating pad (2), pressure cap (3) and rotating buckle (4); The fixed base (1) is designed with an external mounting column interface and a binding groove reserved at both ends; the insulating pad (2) is embedded inside the pressure cover (3) to provide insulation; the pressure cover (3) is installed on the fixed base (1); the rotating buckle (4) is installed on the pressure cover (3) by screws (5) and can rotate around the axis of the screws (5) to fix and release the degree of rotation freedom and limit the position.

2. A fold and deploy mast cable mounting apparatus as claimed in claim 1, characterised in that, The bottom surface of the fixed base (1) is provided with a cylindrical surface (11) for cooperating with external rods, and for bonding with the cylindrical rod (100) of the external rods.

3. A folding and unfolding framework cable installation device according to claim 2, characterized in that, The fixed base (1) is made of polyimide insulating material; the cylindrical surface (11) and the cylindrical rod (100) are bonded together with silicone rubber.

4. A fold and deploy mast cable mounting apparatus as claimed in claim 2, characterised in that, The fixed base (1) has grooves (13) at both ends. The grooves (13) and the cylindrical rod (100) are fastened together by Kevlar rope to achieve fixation.

5. A folding and unfolding frame cable installation device according to claim 1, characterized in that, One end of the fixed base (1) is a door-hole type limiting hole (12) for fixing the pin of the cover (3); the other end is a threaded hole (14) for fixing the screw of the cover (3).

6. A folding and unfolding frame cable installation device according to claim 1, characterized in that, The pressure cap (3) includes a snap-fit ​​body for crimping the cable, with the pin (21) at one end and the screw mounting hole (24) at the other end; the pressure cap (3) has a threaded hole (25) in the center; by inserting the pin (21) into the door-type limiting hole (12) and locking the fastening screw (5) into the screw mounting hole (24), the flat cable is crimped and fixed between the insulating pad (2) and the fixed base (1).

7. A folding and unfolding framework cable installation device according to claim 1, characterized in that, The pressure cap (3) is made of semi-cylindrical aluminum alloy parts; the top of the pressure cap has a cylindrical groove (22) to provide a rotation limit boundary for the rotating buckle (4).

8. A fold and deploy mast cable mounting apparatus as claimed in claim 6, wherein, The rotating buckle (4) is installed on the threaded hole (25) in the center of the cover (3) by screws (5) to accommodate the cable and release the torsional stress generated during its movement.

9. A folding and unfolding framework cable installation device according to claim 7, characterized in that, The bottom of the rotating buckle (4) is equipped with a cylindrical limiting device (42), which moves inside the slot (22). The angle of rotation of the rotating buckle (4) around the axis of the screw (5) is between 0° and 45°.

10. A fold and deploy mast cable mounting apparatus as claimed in any one of claims 1 to 9, wherein, The rotating buckle (4) is dumbbell-shaped, and the dumbbell-shaped supports (41) at both ends are used for bundling and fixing the cable.

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