Cable Reel for Aerospace Cable

Abstract

The present invention provides a cable reel for aerospace cables, which includes a first reel, a second reel and a telescopic mechanism. The two ends of the telescopic mechanism are respectively connected to the first reel and the second reel. The first reel includes a first outer reel and a first inner reel, and the first inner reel is connected to the first outer reel through a first central bearing. The second reel includes a second outer reel and a second inner reel, and the second inner reel is connected to the second outer reel through a second central bearing. The telescopic mechanism includes an inner shaft and an outer shaft. The inner shaft is fitted inside the outer shaft. The outer shaft is fixedly connected to the first inner reel, and the inner shaft is fixedly connected to the second inner reel. A guiding groove is provided on the outer surface of the inner shaft, and the guiding groove extends spirally from one end of the inner shaft to the other end. A plurality of limiting grooves are spaced on the guiding groove, and the limiting grooves form a spiral shape outward from the guiding groove. A protrusion is provided on the inner surface of the outer shaft. During telescoping, the protrusion slides along the direction of the guiding groove and is positioned in any one of the limiting grooves.

Description

Technical Field

[0001] The present invention relates to the technical field of cable reels, and in particular, to a cable reel for aerospace cables. Background Art

[0002] With the large-scale improvement of the global space utilization scale, the frequency of China's aerospace missions has been increasing day by day. The increasing number of mission launches also means that the overall assembly and overall testing efficiency of aerospace launch vehicles, satellites, and spacecraft must be improved as much as possible in a short time.

[0003] In the overall assembly and overall testing of aerospace production, the storage, retrieval, and installation of cables have always been important issues to be solved: 1) Aerospace cables have high precision and cannot be easily stepped on or collided; 2) In order to ensure the connection length between product equipment and product equipment or ground test equipment, aerospace cables are often dozens of meters long. At present, they still mainly rely on manual winding and installation. Therefore, multiple people are required to cooperate in storage, and it is easy to cause local twisting and damage to the cables, affecting the use and reducing production efficiency; 3) Due to the protective requirements of aerospace cables, many cables are covered with a thick rubber protective layer or a lightning protection metal skin. Therefore, the weight of aerospace cables is much greater than that of general cables, inevitably leading to difficult handling; 4) There may be hundreds of test cables or equipment connection cables on spacecraft or launch vehicles, and random placement has the risk of mutual confusion; 5) Due to the lack of suitable cable reels, at present, cables can only be stacked on workbenches, shelves, and the ground and simply protected. If a certain amount of cable is needed, it can only rely on manual handling, handcarts, or hydraulic trucks, which is quite time-consuming and laborious. Therefore, it is very inconvenient to retrieve or install cables; 6) Aerospace cables sometimes need to be transported for a long time and over a long distance. Therefore, it is necessary to do a good job in cable protection before transportation; 7) There are many types and specifications of aerospace cables. Selecting a single type of cable reel cannot meet the production needs, and selecting multiple types of cable reels will cause difficulties in sorting and storage; 8) If there is no good way to fix the cable during installation, it may cause the cable to collide with the ground or the product, resulting in unexpected damage.

[0004] There is a patent document with the publication number CN217626915U, which discloses a cable reel for an oil tank cleaning protection device, including a cable reel bracket. Inside the cable reel bracket, there are bearings installed. The number of bearings is two. Between the two bearings, there is an intermediate washer. Inside the bearings, there is a cable reel. On the back of the cable reel bracket, there is an end cover fixed by screws. On the outer surface of the screws, there are flat washers sleeved. The outer surface of the flat washers is in contact with the back of the cable reel bracket. On the outer surface of the screws, there are spring washers sleeved. The outer surface of the spring washers is in contact with the outer surface of the flat washers. After the installation of the present utility model, the cable head can be fixed. By manually rotating the cable reel, the winding of the cable can be realized.

[0005] Most of the conventional cable reels on the market at present are small cable reels suitable for relatively thin and light cables, and cannot meet the sorting and storage of various types of cable reels. Therefore, there is an urgent need to design a cable reel that meets the special needs of aerospace production and put it into use to solve the above problems. Summary of the Invention

[0006] Aiming at the defects in the prior art, the purpose of the present invention is to provide a cable reel for aerospace cables.

[0007] According to the cable reel for aerospace cables provided by the present invention, it includes a first reel, a second reel and a telescopic mechanism. The two ends of the telescopic mechanism are respectively connected to the first reel and the second reel;

[0008] The first reel includes a first outer reel and a first inner reel. The first inner reel and the first outer reel are connected by a first central bearing;

[0009] The second reel includes a second outer reel and a second inner reel. The second inner reel and the second outer reel are connected by a second central bearing;

[0010] The telescopic mechanism includes an inner shaft and an outer shaft. The inner shaft is fitted inside the outer shaft. The outer shaft is fixedly connected to the first inner reel, and the inner shaft is fixedly connected to the second inner reel;

[0011] On the outer surface of the inner shaft, there are guiding grooves. The guiding grooves extend spirally from one end of the inner shaft to the other end of the inner shaft;

[0012] On the guiding grooves, there are a plurality of limiting grooves arranged at intervals. The limiting grooves form a spiral shape outward from the guiding grooves;

[0013] On the inner surface of the outer shaft, there are protrusions;

[0014] When telescoping, the protrusions slide along the direction of the guiding grooves and are positioned in any one of the limiting grooves.

[0015] Preferably, there are a plurality of the guiding grooves, and the plurality of guiding grooves are spaced apart on the outer surface of the inner shaft. The protrusions include a plurality;

[0016] The plurality of protrusions are circumferentially distributed on the inner surface of the outer shaft;

[0017] Any one of the protrusions corresponds to any one of the guiding grooves;

[0018] A plurality of limiting grooves are provided on any one of the guiding grooves.

[0019] Preferably, there are three guiding grooves, and the three guiding grooves are spaced apart at 120° on the outer surface of the inner shaft;

[0020] The protrusions include three;

[0021] Any one of the protrusions corresponds to any one of the guiding grooves.

[0022] Preferably, marks are further provided on the outer surface of the inner shaft. The marks include a plurality, and any one of the marks corresponds to any one of the limiting grooves;

[0023] When the edge of the outer shaft coincides with any one of the marks, the protrusion enters any one of the limiting grooves corresponding to the any one of the marks from the guiding groove.

[0024] Preferably, the protrusion and the guiding groove are in clearance fit, and the protrusion and the limiting groove are in transition fit.

[0025] Preferably, one end of the outer shaft fitted with the inner shaft is provided with a transition section. The transition section includes an arc portion, and the radius of the transition section gradually decreases along the direction from the outer shaft to the inner shaft.

[0026] Preferably, clamping grooves and clamping blocks are respectively provided on the first outer winding disc and the second outer winding disc, and a clamping block is provided between any two clamping grooves;

[0027] The plurality of cable reels include a stacked state. In the stacked state, the clamping groove of one cable reel is engaged with the clamping block of another cable reel.

[0028] Preferably, a first isolation disc is further provided between the first inner winding disc and the outer shaft, and the first isolation disc is fixed on the first inner winding disc;

[0029] A second isolation disc is further provided between the second inner winding disc and the inner shaft, and the second isolation disc is fixed on the second inner winding disc.

[0030] Preferably, holes are provided on both the first isolation disc and the second isolation disc, and the holes are distributed along the circumferences of the first isolation disc and the second isolation disc.

[0031] Preferably, the first outer winding disc is connected to the outer ring of the first central bearing, and the first inner winding disc is connected to the inner ring of the first central bearing;

[0032] The second outer winding disc is connected to the outer ring of the second central bearing, and the second inner winding disc is connected to the inner ring of the second central bearing.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] 1. The present invention adjusts the length of the telescopic mechanism by setting the relative rotation of the inner shaft and the outer shaft, realizes the telescoping of the cable reel, so as to adapt to different specifications of aerospace cable lengths;

[0035] 2. The present invention sets a guiding groove and a limiting groove on the outer wall of the inner shaft, and a protrusion on the inner wall of the outer shaft. The protrusion is slidably matched with the guiding groove to introduce the protrusion in a specific direction, and the protrusion is snapped into the limiting groove. The cable reel adjusts the telescopic position only when it is rotated in a specific way of operation, avoiding the telescopic mechanism from being actuated by external force, and facilitating the cable reel to adapt to the storage and transportation of cables of different specifications and lengths;

[0036] 3. The present invention sets a card slot and a card block on both the first outer winding disc and the second outer winding disc, and the card slot and the card block are mutually engaged, realizing the ability of multiple cable reels to be stacked on top of each other, and greatly reducing the space occupied when storing aerospace cables;

[0037] 4. The present invention sets holes on the first isolation disc and the second isolation disc, and the holes allow materials such as cable ties to fix the cable plug, preventing damage to the cable plug during transportation or movement;

[0038] 5. The present invention can protect the aerospace cable when storing the aerospace cable, reduce the manpower required for winding and installing the aerospace cable, reduce local curling that may damage the aerospace cable, improve the convenience of moving the aerospace cable, ensure the neat and orderly storage of the aerospace cable, and make the winding and installation operations of the aerospace cable more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] By reading the following detailed description of the non-limiting embodiments with reference to the accompanying drawings, other features, objects and advantages of the present invention will become more apparent:

[0040] Figure 1 A three-dimensional structure diagram mainly showing the cable reel of the present invention;

[0041] Figure 2 A top view mainly showing the cable reel of the present invention;

[0042] Figure 3 A schematic diagram mainly showing the connection manner between the first inner winding disc and the first central bearing of the present invention;

[0043] Figure 4 Schematic diagram mainly showing the connection mode between the first outer spool and the first central bearing of the present invention;

[0044] Figure 5 Top view mainly showing the combination of the inner shaft and the outer shaft of the present invention;

[0045] Figure 6 Schematic three - dimensional structure diagram mainly showing the outer shaft of the present invention;

[0046] Figure 7 Side view mainly showing the cable spool of the present invention.

[0047] As shown in the figure:

[0048] Specific embodiments

[0049] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all belong to the protection scope of the present invention.

[0050] As Figure 1 and Figure 2 shown, a cable spool for aerospace cables provided by the present invention includes a first spool, a second spool and a telescopic mechanism. Both ends of the telescopic mechanism are respectively connected to the first spool and the second spool. The first spool includes a first outer spool 1 and a first inner spool 3. The first inner spool 3 is connected to the first outer spool 1 through a first central bearing 10. The second spool includes a second outer spool 2 and a second inner spool 4. The second outer spool 2 is connected to the second inner spool 4 through a second central bearing. The telescopic mechanism includes an inner shaft 7 and an outer shaft 8. The inner shaft 7 is fitted inside the outer shaft 8. The outer shaft 8 is fixedly connected to the first inner spool 3, and the inner shaft 7 is fixedly connected to the second inner spool 4. A guiding groove 11 is provided on the outer surface of the inner shaft 7. The guiding groove 11 extends spirally from one end of the inner shaft 7 to the other end of the inner shaft 7. A plurality of limiting grooves 12 are spaced on the guiding groove 11. The limiting grooves 12 form a spiral shape outward from the guiding groove 11. A protrusion 13 is provided on the inner surface of the outer shaft 8. During telescoping, the protrusion 13 slides along the direction of the guiding groove 11 and is positioned in any one of the limiting grooves 12.

[0051] As Figure 3 and Figure 4As shown in the figure, in the present invention, the first outer winding disc 1 is connected to the outer ring of the first central bearing 10, and the first inner winding disc 3 is connected to the inner ring of the first central bearing 10; the second outer winding disc 2 is connected to the outer ring of the second central bearing, and the second inner winding disc 4 is connected to the inner ring of the second central bearing. The inner shaft 7 is fitted into the outer shaft 8, and the outer shaft 8 is fixedly connected to the first inner winding disc 3, and the inner shaft 7 is fixedly connected to the second inner winding disc 4. When the first outer winding disc 1 is stationary, the first inner winding disc 3 rotates, or when the first inner winding disc 3 is stationary, the first outer winding disc 1 rotates. At the same time, when the second outer winding disc 2 is stationary, the second inner winding disc 4 rotates, or when the second inner winding disc 4 is stationary, the second outer winding disc 2 rotates. When the first inner winding disc 3 or the second inner winding disc 4 is manually rotated, the first outer winding disc 1 and the second outer winding disc 2 remain stationary, and the first inner winding disc 3 and the second inner winding disc 4 rotate simultaneously, realizing the winding and unwinding of the aerospace cable on the cable reel. When the first outer winding disc 1 or the second outer winding disc 2 is manually rotated, the first inner winding disc 3 and the second inner winding disc 4 remain stationary, and the first outer winding disc 1 and the second outer winding disc 2 rotate, realizing the movement and change of the position of the cable reel.

[0052] As Figure 5 and Figure 6 shown, the telescopic mechanism of the present invention includes an inner shaft 7 and an outer shaft 8. The inner shaft 7 is fitted into the outer shaft 8. The inner shaft 7 and the outer shaft 8 are preferably hollow cylinders, thereby reducing the overall weight of the cable reel, making the cable reel lighter, and at the same time enabling the inner shaft 7 to be fitted into the hollow outer shaft. A guiding groove 11 is provided on the outer surface of the inner shaft 7. The guiding groove 11 extends spirally from one end of the inner shaft 7 to the other end of the inner shaft 7. A plurality of limiting grooves 12 are provided at intervals on the guiding groove 11. The limiting grooves 12 are formed in a spiral shape outward from the guiding groove 11. A protrusion 13 is provided on the inner surface of the outer shaft 8. During telescoping, the protrusion 13 slides along the direction of the guiding groove 11 and is positioned in any one of the limiting grooves 12. When it is necessary to increase or decrease the length of the telescopic mechanism, first screw the protrusion 13 out of the limiting groove 12, then the protrusion 13 slides along the guiding groove 11 to another limiting groove 12, and screw the protrusion 13 into this limiting groove 12. The protrusion 13 is clamped into the limiting groove 12, completing the adjustment of the length of the telescopic mechanism. The adjustment of the length of the telescopic mechanism adapts to cables of different specified lengths, making the cable storage space more compact. Through the introduction of the spiral guiding groove 11 in the present invention, the protrusion 13 can easily reach the limiting groove 12 in a rotating manner, and the structure of using the spiral limiting groove 12 to clamp the protrusion 13 makes the fitting manner of the inner shaft 7 and the outer shaft 8 more firm. The cable reel adjusts the telescopic position only when operating and rotating in a specific manner, avoiding the telescopic mechanism from being actuated by external forces, facilitating the cable reel to adapt to the storage and transportation of cables of different specified lengths, and the present invention adopts a fully mechanical structure to ensure safety during long-distance transportation.

[0053] Specifically, there are multiple guiding grooves 11, and the multiple guiding grooves 11 are spaced apart on the outer surface of the inner shaft 7. There are multiple protrusions 13, and the multiple protrusions 13 are circumferentially distributed on the inner surface of the outer shaft 8. Any one of the protrusions 13 corresponds to any one of the guiding grooves 11, and multiple limiting grooves 12 are provided on any one of the guiding grooves 11. Preferably, there are three guiding grooves 11, and the three guiding grooves 11 are spaced apart at 120° on the outer surface of the inner shaft 7. There are three protrusions 13, and any one of the protrusions 13 corresponds to any one of the guiding grooves 11. The three protrusions 13 respectively correspond to the three guiding grooves 11. The three guiding grooves 11 control the inner shaft 7 to be engaged with the inner wall of the outer shaft 8 in three different directions, and it is necessary to satisfy external forces in three different directions to screw out the protrusions 13. If only the external force in one direction is satisfied, it is not easy to screw out the protrusions 13. In order to enable the protrusions 13 to slide in the guiding grooves 11 and easily enter the limiting grooves 12, the protrusions 13 and the guiding grooves 11 are in clearance fit, and the protrusions 13 and the limiting grooves 12 are in transition fit.

[0054] To facilitate the adjustment of the length of the telescopic mechanism, marks 17 are provided on the outer surface of the inner shaft 7. There are multiple marks 17, and any one of the marks 17 corresponds to any one of the limiting grooves 12. A preferred implementation is: a circular protrusion 13 is provided on the inner wall of the outer shaft 8 at a position 5 cm away from the end engaged with the inner shaft 7, and a mark 17 is provided on the outer wall of the inner shaft 7 at a position 5 cm away from the end engaged with the outer shaft 8. Another mark 17 is provided 5 cm further from this mark 17 towards the other end of the inner shaft, and so on, with a certain number of marks 17 set to meet the adjustment requirements for different lengths. During the telescopic process, when the edge of the outer shaft 8 coincides with any one of the marks 17, the protrusion 13 is exactly at the entrance of the limiting groove 12, and the protrusion 13 enters any one of the limiting grooves 12 corresponding to any one of the marks 17 from the guiding groove 11.

[0055] Specifically, one end of the outer shaft 8 engaged with the inner shaft 7 is provided with a transition section 14. The transition section 14 includes an arc portion, and the radius of the transition section 14 gradually decreases along the direction from the outer shaft 8 towards the inner shaft 7. Thus, the cable will not be damaged due to the thickness difference between the inner shaft 7 and the outer shaft 8 during winding.

[0056] Specifically, as Figure 1 and Figure 7As shown, a card slot 5 and a clamping block 6 are respectively arranged on each of the first outer winding disc 1 and the second outer winding disc 2. A clamping block 6 is arranged between any two card slots 5. The multiple cable reels include a stacked state. In the stacked state, the card slot 5 of one cable reel is engaged with the clamping block 6 of another cable reel, and at the same time, the clamping block 6 of one cable reel is engaged with the card slot 5 of another cable reel, so that the multiple cable reels can be horizontally stacked and fixed, which can protect the cable when storing the cable, reduce the manpower required for winding and installing the cable, reduce the local curling that may damage the cable, improve the convenience of moving the cable, ensure the neat and orderly storage of the cable, make the cable winding and installation operations more convenient, and at the same time, through the engagement of the card slot 5 and the clamping block 6, the ability of the multiple cable reels to stack with each other is realized.

[0057] Specifically, a first isolation disc 15 is arranged between the first inner winding disc 3 and the outer shaft 8, and the first isolation disc 15 is fixed on the first inner winding disc 3. A second isolation disc 16 is arranged between the second inner winding disc 4 and the inner shaft 7, and the second isolation disc 16 is fixed on the second inner winding disc 4. Thus, the connection relationship among the first outer winding disc 1, the first inner winding disc 3, the first isolation disc 15 and the outer shaft 8 is as follows: the first outer winding disc 1 is connected to the outer ring of the first central bearing 10, the first inner winding disc 3 is connected to the inner ring of the first central bearing 10, the first isolation disc 15 is fixed on the first inner winding disc 3, and the first isolation disc 15 is fixedly connected to the outer shaft 8; the connection relationship among the second outer winding disc 2, the second inner winding disc 4, the second isolation disc 16 and the inner shaft 7 is as follows: the second outer winding disc 2 is connected to the outer ring of the second central bearing, the second inner winding disc 4 is connected to the inner ring of the second central bearing, the second isolation disc 16 is fixed on the second inner winding disc 4, and the second isolation disc 16 is fixedly connected to the inner shaft 7. Preferably, the diameter of the first outer winding disc 1 is greater than the diameter of the first isolation disc 15, and the diameter of the first isolation disc 15 is greater than the diameter of the first inner winding disc 3. Similarly, the diameter of the second outer winding disc 2 is greater than the diameter of the second isolation disc 16, and the diameter of the second isolation disc 16 is greater than the diameter of the second inner winding disc 4. When manually adjusting the length of the telescopic mechanism, the first isolation disc 15 and the second isolation disc 16 can be held, so that while the protrusion 13 slides along the guiding groove 11 and determines the position, when the front end of the transition section 14 touches the mark 17, the protrusion 13 is located at the entrance of the limiting groove 12, and then the first isolation disc 15 and the second isolation disc 16 are held to rotate the telescopic mechanism, so that the protrusion 13 is snapped into the limiting groove 12 to complete the adjustment of the length of the telescopic mechanism.

[0058] More specifically, holes 9 are arranged on both the first isolation disc 15 and the second isolation disc 16. The holes 9 are distributed along the circumference of the first isolation disc 15 and the second isolation disc 16, and the holes 9 are preferably arc-shaped holes. The specific implementation method can be set as: such as Figure 1 and Figure 3As shown, arc holes distributed in a circular pattern are provided near the edges of the first isolation disk 15 and the second isolation disk 16. The arc holes allow the cable plug to be fixed by materials such as cable ties to prevent damage to the cable plug during transportation or movement.

[0059] The present invention has a simple structure and flexible operation. It can control the length of the telescopic mechanism through the relative rotation of the inner and outer reels, the inner shaft 7 and the outer shaft 8 to achieve the telescopic movement of the cable reel. By setting the protrusion 13 to slide with the guide groove 11 and setting the protrusion 13 to be stuck in the limit groove 12, the cable reel can adjust the telescopic position only when it is rotated in a specific way, avoiding the external force to cause the telescopic mechanism to move, and facilitating the cable reel to adapt to the storage and transportation of cables of different specifications and lengths; through the engagement of the card slot 5 and the card block 6, the ability of multiple cable reels to stack on each other is achieved. The present invention can protect the cable when storing the cable, reduce the manpower requirements when winding and installing the cable, reduce the local curling that will cause damage to the cable, improve the convenience of moving the cable, ensure the neatness and orderliness of the cable storage, and make the cable winding and installation operations more convenient. The present invention adopts a full mechanical structure to ensure safety during long-distance transportation, and uses a telescopic mechanism to adapt to cables of different specifications and lengths, making the cable storage space more compact.

[0060] The present invention can protect the aerospace cable when storing it, reduce the manpower requirements when winding and installing the aerospace cable, reduce local curling that may cause damage to the aerospace cable, improve the convenience of moving the aerospace cable, ensure that the aerospace cable is stored neatly and orderly, and make the winding and installation operations of the aerospace cable more convenient.

[0061] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0062] 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 can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A cable reel for aerospace cables, characterized in that: It comprises a first reel, a second reel and a telescopic mechanism, wherein two ends of the telescopic mechanism are respectively connected to the first reel and the second reel; The first reel comprises a first outer reel (1) and a first inner reel (3), wherein the first inner reel (3) is connected to the first outer reel (1) via a first central bearing (10); The second reel comprises a second outer reel (2) and a second inner reel (4), wherein the second inner reel (4) is connected to the second outer reel (2) via a second central bearing; The telescopic mechanism comprises an inner shaft (7) and an outer shaft (8), the inner shaft (7) being embedded in the outer shaft (8), the outer shaft (8) being fixedly connected to the first inner reel (3), and the inner shaft (7) being fixedly connected to the second inner reel (4); A guide groove (11) is provided on the outer surface of the inner shaft (7), and the guide groove (11) extends in a spiral shape from one end of the inner shaft (7) to the other end of the inner shaft (7); A plurality of limiting grooves (12) are arranged at intervals on the guide groove (11), and the limiting grooves (12) form a spiral shape outward from the guide groove (11); A protrusion (13) is provided on the inner surface of the outer shaft (8); When extending or retracting, the protrusion (13) slides along the direction of the guide groove (11) and is positioned in any limiting groove (12).

2. The cable reel for aerospace cables according to claim 1, characterized in that: The guide grooves (11) include a plurality of guide grooves (11), the plurality of guide grooves (11) are spaced apart and distributed on the outer surface of the inner shaft (7), and the protrusions (13) include a plurality of protrusions (13); A plurality of protrusions (13) are circumferentially distributed on the inner surface of the outer shaft (8); Any of the protrusions (13) corresponds to any of the guide grooves (11); A plurality of limiting grooves (12) are provided on any one of the guide grooves (11).

3. The cable reel for aerospace cables according to claim 2, characterized in that: The guide grooves (11) include three guide grooves (11), which are distributed on the outer surface of the inner shaft (7) at intervals of 120°; The protrusions (13) include three.

4. The cable reel for aerospace cables according to claim 1, characterized in that: A mark (17) is also provided on the outer surface of the inner shaft (7), wherein the mark (17) comprises a plurality of marks, and any one of the marks (17) corresponds to any one of the limiting grooves (12); When the edge of the outer shaft (8) coincides with any mark (17), the protrusion (13) enters from the guide groove (11) into any limiting groove (12) corresponding to any mark (17).

5. The cable reel for aerospace cables according to claim 1, characterized in that: The protrusion (13) and the guide groove (11) are clearance-matched, and the protrusion (13) and the limiting groove (12) are transitionally matched.

6. The cable reel for aerospace cables according to claim 1, characterized in that: A transition section (14) is provided at one end of the outer shaft (8) engaged with the inner shaft (7); the transition section (14) comprises an arc portion; and the radius of the transition section (14) gradually decreases in a direction from the outer shaft (8) to the inner shaft (7).

7. The cable reel for aerospace cables according to claim 1, characterized in that: The first outer reel (1) and the second outer reel (2) are respectively provided with a card slot (5) and a card block (6), and a card block (6) is provided between any two card slots (5); The plurality of cable reels are in a stacked state, wherein a card slot (5) of one cable reel and a card block (6) of another cable reel are interlocked in the stacked state.

8. The cable reel for aerospace cables according to claim 1, characterized in that: A first isolation disk (15) is further provided between the first inner reel (3) and the outer shaft (8), and the first isolation disk (15) is fixed on the first inner reel (3); A second isolation disk (16) is also provided between the second inner reel (4) and the inner shaft (7), and the second isolation disk (16) is fixed on the second inner reel (4).

9. The cable reel for aerospace cables according to claim 8, characterized in that: Holes (9) are provided on both the first isolation disk (15) and the second isolation disk (16), and the holes (9) are distributed along the circumference of the first isolation disk (15) and the second isolation disk (16).

10. The cable reel for aerospace cables according to claim 1, characterized in that: The first outer reel (1) is connected to the outer ring of the first central bearing (10), and the first inner reel (3) is connected to the inner ring of the first central bearing (10); The second outer reel (2) is connected to the outer ring of the second central bearing, and the second inner reel (4) is connected to the inner ring of the second central bearing.

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