A multifunctional integrated interface for modular space facility on-orbit assembly

Abstract

A multifunctional integrated interface for on-orbit assembly of modular space facilities belongs to the technical field of aerospace. A support structure is connected between an upper cover plate and a fixed base and constitutes a circular cavity structure, a driving ring is drivingly connected with a pin ring and can drive the pin ring to move up and down, the pin ring is used for realizing alignment positioning of the interface, the driving ring and the fixed ring are matched through a coupling pin and can drive a coupling ring to move up and down, the coupling ring is used for realizing locking function of the interface, a rotary base is drivingly connected with the driving ring at a lower end, a plurality of electric heating components are connected with the rotary base at an upper end and pass through the fixed ring, the driving ring drives the plurality of electric heating components to move up and down through the rotary base, and the plurality of electric heating components are used for realizing data transmission and power transmission function in cooperation with a counter interface. The interface has mechanical locking, data transmission, power transmission and heat exchange functions, and can meet on-orbit working requirements of the modular space structure.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of aerospace, and particularly relates to a multifunctional integrated interface for on-orbit assembly of modular space facilities. BACKGROUND

[0002] With the development of related technical fields such as aerospace, the depth of space exploration continues to increase, and the aperture demand of large space facilities such as space telescopes and space solar power stations also increases. However, due to factors such as the fairing aperture, carrying capacity and processing capacity of existing spacecraft, it is not possible to use the method of directly processing on the ground and then launching into space in one shot to deploy the required large-aperture space facilities in the corresponding orbit. Therefore, it is a development direction to design large-aperture space facilities into modular structures of the same size using a reasonable decomposition design method, and then launch them in batches by carrier rockets and assemble them on-orbit.

[0003] In order to realize the connection of each module and make it function as a whole, a locking interface needs to be installed on different modules. Considering the on-orbit working environment of large-aperture space facilities, the interface between modules (hereinafter referred to as interface) not only needs to have the basic mechanical locking function to tightly connect each module into a whole, but also needs to be able to realize data transmission, power transmission and heat exchange between modules, which is convenient for the management and control of large-aperture space facilities. In addition, since large-aperture space facilities are usually assembled by multiple modules, in order to prolong the on-orbit service period as much as possible and prevent the failure of the entire space facility due to the failure of a single module, the interface also needs to have the feature of facilitating module replacement. SUMMARY

[0004] The purpose of the present application is to provide a multifunctional integrated interface for on-orbit assembly of modular space facilities, which can realize data transmission, power transmission and heat exchange functions.

[0005] The technical solution adopted by the present application is:

[0006] A multifunctional integrated interface for on-orbit assembly of modular space facilities, comprising a driving ring, a coupling ring, a fixed ring, a support structure, an upper cover plate, a spring pin, an electrical and thermal component, a pin ring, a rotating base and a fixed base;

[0007] The upper cover plate and the fixed base are connected by the support structure and constitute a circular cavity structure, and the fixed ring, the coupling ring, the driving ring and the pin ring are sequentially sleeved from the inside to the outside and arranged in the circular cavity structure,

[0008] The driving ring is in driving connection with the pin ring and can drive the pin ring to move up and down, the pin ring is used for realizing alignment positioning of the interface, the driving ring and the fixed ring are in cooperation through the coupling pin and can drive the coupling ring to move up and down, the coupling ring is used for realizing locking function of the interface, the lower end of the rotating base is in driving connection with the driving ring, the upper end of the rotating base penetrates through the fixed ring and is connected with the digital electric heating assembly, the driving ring drives the digital electric heating assembly to move up and down through the rotating base, and the digital electric heating assembly is used for realizing data transmission and power transmission function in cooperation with the opposite interface.

[0009] Compared with the prior art, the application has the following beneficial effects:

[0010] 1. Complete functions: the interface of the application has mechanical locking, data transmission, power transmission and heat exchange functions, and can meet the on-orbit working requirements of the modular space structure.

[0011] 2. Simple control: the interface of the application adopts a single motor multi-step telescopic mode, and only needs to control the rotation of the internal driving ring driven by the single motor to complete pin-hole insertion, lock hook locking and butt joint of the digital electric heating assembly, and realize all functions of the interface.

[0012] 3. Simplified structure: the interface of the application is designed as a hermaphroditic structure, which can be used as an active end and a passive end at the same time, and all functions can be realized only through the movement of the active end.

[0013] 4. Functional redundancy: the overall structure of the interface of the application is designed as 90° rotational symmetry, which greatly increases the functional redundancy and ensures that the remaining parts of the interface can work normally and stably when a single part fails.

[0014] 5. Easy module replacement: the overall design of the interface of the application is a cylindrical structure, and each part extended after unlocking is retracted into the inside of the cylindrical structure, the interfaces are flatly attached, there is no structural intersection or engagement, and the module replacement is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the exploded view of the application;

[0016] Figure 2 is a driving ring structure schematic view of the application;

[0017] Figure 3 is a fixed ring structure schematic view of the application;

[0018] Figure 4 is a digital electric heating assembly structure schematic view of the application;

[0019] Figure 5 is a rotating base structure schematic view of the application;

[0020] Figure 6is a coupling pin movement schematic diagram of the present application;

[0021] Figure 7 is a coupling pin self-locking schematic diagram of the present application;

[0022] Figure 8 is an interface movement schematic diagram of the present application;

[0023] Figure 9 is an interface as a driving end locking state schematic diagram of the present application;

[0024] Figure 10 is a fault module replacement schematic diagram;

[0025] Wherein: 11, drive ring; 111, drive gear; 112, drive ring outer groove line; 113, drive ring inner groove line; 114, drive ring top end lock hook; 115, outer gear; 12, coupling ring; 121, coupling hole; 122, top lock hook; 13, coupling pin; 14, fixed ring; 141, fixed hole; 142, groove line; 143, positioning hole one; 15, support structure; 151, vertical groove line; 152, bolt hole one; 16, upper cover plate; 161, bolt hole two; 162, positioning hole two; 163, tapered hole; 17, spring pin; 18, digital electrical heating assembly; 181, positioning hole three; 182, rolling bearing; 183, annular thin plate; 184, heat exchange interface; 185, bolt; 186, circuit board; 187, contact plug; 19, pin ring; 191, positioning pin; 192, inner side guide pin; 193, positioning hole four; 194, outer side guide pin; 20, rotating base; 201, inner gear; 202, annular groove; 203, slope; 204, step; 21, fixed base; 211, positioning hole five; 212, bolt hole three; 213, center hole; 22, connecting bolt; 30, space module structure; 31, dashed line; 32, locking interface. DETAILED DESCRIPTION

[0026] In order to better understand the purpose, structure and function of the present application, the present application is described in further detail below in combination with the drawings.

[0027] The interface structure composition in the present application is as shown in Figure 1 The main components include drive ring 11, coupling ring 12, coupling pin 13, fixed ring 14, support structure 15, upper cover plate 16, spring pin 17, digital electrical heating assembly 18, pin ring 19, rotating base 20, fixed base 21, connecting bolt 22.

[0028] The upper cover plate 16 and the fixed base 21 are connected by the support structure 15 and constitute a circular cavity structure, and the fixed ring 14, the coupling ring 12, the drive ring 11 and the pin ring 19 are sequentially sleeved from inside to outside and arranged in the circular cavity structure,

[0029] The driving ring 11 is in driving connection with the pin ring 19 and can drive the pin ring 19 to move up and down, the pin ring 19 is used to realize the alignment positioning of the interface, the driving ring 11 and the fixed ring 14 are matched through the coupling pin 13 to drive the coupling ring 12 to move up and down, the coupling ring 12 is used to realize the locking function of the interface, the lower end of the rotating base 20 is in driving connection with the driving ring 11, the upper end of the rotating base 20 penetrates through the fixed ring 14 and is connected with the plurality of electric heating components 18, the driving ring 11 drives the plurality of electric heating components 18 to move up and down through the rotating base 20, and the plurality of electric heating components 18 are used to cooperate with the opposite interface to realize the data transmission and power transmission functions.

[0030] The structure of the driving ring 11 is shown in Figure 2 The overall structure of the driving ring 11 is cylindrical, the outer wall is provided with a driving gear 111 and three driving ring outer groove lines 112, the inner wall is provided with three driving ring inner groove lines 113, the bottom is provided with an outer gear 115, and the top is provided with four driving ring top end locking hooks 114.

[0031] The structure and size of the driving ring outer groove line 112 and the driving ring inner groove line 113 meet the basic principle of the cylindrical cam. The driving gear 111 is engaged with the external motor to realize the power input of the interface; the driving ring outer groove line 112 is matched with the inner side guide pin 192 of the pin ring 19 to drive the pin ring 19 to move; the driving ring inner groove line 113 is matched with the coupling ring 12 through the coupling pin 13 to drive the coupling pin 13 and the coupling ring 12 to move; the outer gear 115 is engaged with the inner gear 201 of the rotating base 20 (as shown in Figure 5 ), to drive the rotating base 20 to rotate;

[0032] In order to realize the hermaphroditic structure of the interface, the driving ring top end locking hook 114 of the driving ring 11 and the top locking hook 122 of the coupling ring 12 are designed; when the interface acts as the active end, the top locking hook 122 is interlocked with the driving ring top end locking hook 114 of the opposite interface; when the interface acts as the passive end, the driving ring top end locking hook 114 is interlocked with the coupling ring locking hook of the opposite interface.

[0033] The overall structure of the coupling ring 12 is cylindrical, mainly including three coupling holes 121 at the bottom and four top locking hooks 122. The coupling hole 121 is used to fix the coupling pin 13, and the coupling ring 12 realizes the rotary extension function under the action of the coupling pin 13 and the driving ring inner groove line 113; if the interface acts as the active end, the top locking hook 122 needs to cooperate with the driving ring top end locking hook 114 of the passive end to realize the locking function of the interface.

[0034] The coupling pin 13 is a cylindrical structure, and the two ends are respectively connected with the driving ring inner groove line 113 and the fixed ring 14 (as shown in Figure 3The slot line 142 cooperates with the slot line 113 in the driving ring to realize the rotation and translation movement of the coupling pin 13. Since the middle part is located in the coupling hole 121 of the coupling ring 12, the coupling pin 13 moves while driving the coupling ring 12 to move.

[0035] The overall structure of the fixed ring 14 is cylindrical Figure 3 , mainly including three fixed holes 141 at the bottom, three slot lines 142 at the middle position, and three positioning holes 143 at the top. Among them, the fixed hole 141 is connected with the bolt hole three 212 of the fixed base 21 through the connecting bolt 22, used to realize the fixation of the fixed ring 14 itself; the slot line 142 cooperates with the slot line 113 in the driving ring to enable the coupling pin 13 to simultaneously rotate and translate; the positioning hole one 143 is connected with the digital heating assembly 18 through the spring pin 17, used to limit the movement displacement of the digital heating assembly 18.

[0036] The principle diagram of the slot line 142 of the fixed ring 14 cooperating with the slot line 113 in the driving ring to enable the coupling pin 13 to rotate and translate is shown in Figure 6 , Figure 7 . Since the structural size of the slot line 142 and the slot line 113 in the driving ring is designed to meet the space cam principle, during the interface locking process, the slot line 142 is fixed, the slot line 113 in the driving ring rotates according to the given direction (the rotation direction during the locking process is shown by the black arrow in Figure 6 , and the rotation direction during the unlocking process is opposite to the direction shown by the black arrow), the coupling pin 13 realizes the rotation and translation movement under the comprehensive action of the coupling force, and drives the coupling ring 12 to rotate outward to extend, realizing the locking function of the top locking hook 122. After the slot line 113 in the driving ring moves a certain angle according to the rotation direction, the coupling pin 13 moves to the terminal position Figure 7 . At this time, under the joint action of the slot line 142 and the slot line 113 in the driving ring, the coupling pin 13 meets the self-locking condition, and the interface remains in the locked state. The locked state of the interface in the present application as the active end is shown in Figure 9 , the pin ring 19 is attached to the upper cover plate 16. At this time, the positioning pin 191, the top locking hook 122, and the digital heating assembly 18 are all in the extended state, and cooperate with the tapered hole, the driving ring locking hook, and the digital heating assembly of the opposite interface, respectively, to realize the mechanical locking, data exchange, power transmission, and heat transfer functions between the modules.

[0037] The support structure 15 is three independent arc-shaped plates, mainly including vertical slot lines 151 on the inner side, bolt holes one 152 on the upper and lower ends. Among them, the vertical slot lines 151 cooperate with the outer guide pins 194 of the pin ring 19, so that the pin ring 19 can only move up and down during movement; the bolt holes one 152 are matched with the bolt holes two 161 of the upper cover plate 16 and the positioning holes five 211 of the fixed base 21 respectively, and are connected through the connecting bolts 22 to realize the fixing and supporting functions. In order to reduce the overall mass of the interface, the support structure 15 is designed as three independent arc-shaped plates, which is convenient for processing and manufacturing.

[0038] The overall structure of the upper cover plate 16 is an annular thin plate, mainly including bolt holes two 161, two positioning holes two 162, and two tapered holes 163. Among them, the bolt holes two 161 are matched with the bolt holes one 152 of the support structure 15, and are connected through the connecting bolts 22 to realize the fixing function; the positioning holes two 162 allow the positioning pins 191 to pass through to realize the alignment function of the interface; in order to realize the hermaphroditic structure design, when acting as a passive end interface, the tapered holes 163 allow the positioning pins of the opposite active end interface to enter to realize the alignment function of the interface, and the tapered structure can also increase the tolerance of the interface.

[0039] The overall structure of the spring pin 17 is a cylinder, and the spring is located in the middle part, and the diameters of the two ends are slightly larger than that of the middle part. The two ends of the spring pin 17 are matched with the positioning holes one 143 of the top of the fixed ring 14 (as shown) and the positioning holes three 181 of the digital electric heating assembly 18 (as shown), respectively, allowing the digital electric heating assembly 18 to move up and down when being pushed by external force. Moreover, in order to keep the digital electric heating assembly 18 stable, the spring in the middle position of the spring pin 17 is always in a compressed state. Figure 3 Figure 4 The overall structure of the digital electric heating assembly 18 (as shown) is divided into three layers of upper, middle and lower, which are connected and fixed through the bolts 185, mainly including a cylindrical support structure in the lowermost layer, three positioning holes three 181 and three rolling bearings 182 on the outer side; the middle layer is an annular thin plate 183, which provides a fixing function for the four heat exchange interfaces 184; the uppermost layer is a circuit board 186 with four notches around, which provides a supporting function for the contact plug 187. Similarly, the circuit board 186 is divided into four areas, two by two, to realize the functions of data transmission and power transmission. The positioning holes three 181 are matched with the positioning holes one 143 of the top of the fixed ring 14 (as shown) through the spring pin 17, which realizes positioning and can also move up and down; the rolling bearings 182 are matched with the rotating base 20 (as shown)

[0040] Figure 4 Figure 3 Figure 5 ​​​​The slope 203 allows the rolling bearing 182 to move up and down, and the step 204 is used to keep the moving height of the rolling bearing 182, so as to realize the connection function of the number and electric heat assembly 18 and the interface on the opposite side; the heat exchange interface 184 is divided into two groups, the interfaces in one group are divided into male interfaces and female interfaces, and the interfaces on the opposite side are matched to realize the heat exchange circulation and have a redundancy function; the contact plug 187 is also divided into male interfaces and female interfaces, and the interfaces on the opposite side are matched to realize the data transmission and power transmission functions.

[0041] The overall structure of the pin ring 19 is a ring-shaped thin plate, mainly including two positioning pins 191, an inner guide pin 192, a positioning hole four 193, and an outer guide pin 194. Among them, the positioning pin 191 passes through the positioning hole two 162 of the upper cover plate 16 and is connected to the tapered hole of the upper cover plate of the interface on the opposite side, so as to realize the alignment function of the interface; the inner guide pin 192 is matched with the outer groove line 112 of the driving ring to realize the movement of itself; the positioning hole four 193 is used to satisfy the design of the hermaphroditic interface, and when it is used as a passive end, it is matched with the tapered hole 163 of the upper cover plate 16 to allow the positioning pin of the interface on the opposite side to be inserted, so as to realize the alignment function; the outer guide pin 194 is matched with the vertical groove line 151 of the support structure 15, so that the pin ring 19 can only move up and down.

[0042] The overall structure of the rotating base 20 Figure 5 is a hollow thin plate with a boss in the middle, the inner gear 201 is arranged on the upper surface of the hollow thin plate part, three annular grooves 202 are arranged around the boss part of the hollow thin plate part, and the top of the boss part is a step surface formed by the slope 203 and the step 204. Among them, the inner gear 201 is meshed with the outer gear 115 at the bottom of the driving ring 11 Figure 2 , so as to realize the rotation of itself; the annular groove 202 allows the fixed base 21 and the fixed ring 14 to be connected by the connecting bolt 22; the slope 203 is matched with the rolling bearing 182 of the number and electric heat assembly 18 Figure 4 , so as to allow the rolling bearing 182 to slide along the slope 203 and move the number and electric heat assembly 18 up and down at the same time; the step 204 is matched with the rolling bearing 182 of the number and electric heat assembly 18, so as to keep the rising height of the rolling bearing 182.

[0043] The overall structure of the fixed base 21 is a ring-shaped thin plate, mainly including a positioning hole five 211, a bolt hole three 212, and a center hole 213. Among them, the positioning hole five 211 is matched with the bolt hole one 152 of the support structure 15, is connected by the connecting bolt 22, and is used to realize the fixing function of the support structure 15; the bolt hole three 212 is matched with the connecting bolt 22, and is used to realize the fixing function of the fixed ring 14; the center hole 213 allows the internal circuit of the space module structure to be connected with the number and electric heat assembly 18, so as to realize the data transmission, power transmission, and heat exchange functions between different space module structures through the interface.

[0044] The connecting bolt 22 realizes the fixing function of the fixing ring 14 by cooperating with the bolt hole three 212 of the fixing base 21 and the fixing hole 141 of the fixing ring 14. Meanwhile, the connecting bolt 22 is also used for connecting and fixing the bolt hole one 152 of the support structure 15 with the bolt hole two 161 of the upper cover plate 16 and the positioning hole five 211 of the fixing base 21.

[0045] Through the above analysis, it can be obtained that when the interface in the application is used as the driving end, the driving ring 11 is driven to rotate by a single motor, and then the motion chain transmission process of multiple times of stretching and retracting is realized as shown in Figure 8 The arrow direction in the figure represents the motion transmission direction in the locking process.

[0046] The first motion chain: the extension positioning function of the positioning pin 191 is realized (pin-hole insertion). After the driving ring 11 rotates, the inner guide pin 192 and the outer guide pin 194 move in cooperation with the outer groove line 112 of the driving ring and the vertical groove line 151 of the support structure 15 respectively, and drive the pin ring 19 to move up and down. The positioning pin 191 fixed on the pin ring 19 gradually extends out of the positioning hole two 162 of the upper cover plate 16, and is inserted into the tapered hole of the opposite interface, so that the positioning function of the interface is completed.

[0047] The second motion chain: the mechanical locking function of the top locking hook 122 is realized (locking hook rotation extension). After the driving ring 11 rotates, the coupling pin 13 is driven to realize the combined motion of rotation and extension under the joint action of the driving ring inner groove line 113 and the fixing ring groove line 142 (as shown in Figure 3 ), and then the top locking hook 122 of the coupling ring 12 is driven to rotate and extend, cooperates with the driving ring locking hook of the opposite interface, and realizes the locking function of the interface.

[0048] The third motion chain: the data transmission, power transmission and heat exchange functions of the digital and electrical heating assembly 18 are realized (extension butt joint of the digital and electrical heating assembly 18). After the driving ring 11 rotates, the rotating base 20 is driven to rotate by the meshing of the bottom outer gear 115 and the inner gear 201 of the rotating base 20, and then the digital and electrical heating assembly 18 is extended by the slope 203 at the top of the rotating base 20 (as shown in Figure 5 ) and the rolling bearing 182 at the bottom of the digital and electrical heating assembly 18. After a certain angle is turned, the step 204 cooperates with the rolling bearing 182 to keep the extension height of the digital and electrical heating assembly 18, realizes the butt joint with the digital and electrical heating assembly of the opposite interface, and then realizes the data transmission, power transmission and heat exchange functions of the interface.

[0049] The fault module replacement schematic diagram is as shown in Figure 10As shown, mainly contains space module structure 30 (thick solid line represents the maximum size of space module structure envelope range), installed on the outside of the space module locking interface 32 (dotted line 31 represents the maximum size of locking interface envelope range, the size of dotted line 31 is greater than the size envelope range of space module structure 30), Figure 10 The space module with a shadow part in the center position is a failure module. Since the failure module is connected to other module structures around through the locking interface in the application (the failure module cannot move in the XY plane), the locking interface is a cylindrical structure as a whole, and after unlocking, it is flatly connected with other module interfaces through the upper cover plate 16, and there is no structural intersection or engagement between adjacent interfaces, so the failure module can be moved along the Z-axis direction and the replacement work can be completed.

[0050] In order to realize the mechanical connection function between the modules, the interface in the application first realizes the preliminary positioning between the modules through the pin-hole insertion. After positioning, the locking hook for completing the mechanical connection function is rotated and extended, and cooperates with the related structure of the opposite interface to realize the mechanical locking between the modules. After locking, the electronic and thermal components 18 located in the center of the interface are extended and cooperate with the corresponding components of the opposite interface to realize the data transmission, power transmission and heat exchange functions.

[0051] In addition, in order to facilitate the replacement of the failure module, the interface is designed as a cylindrical structure as a whole. After the docking interfaces of the failure module and the adjacent modules are unlocked, the parts for realizing positioning, locking and electronic and thermal docking are retracted into the cylindrical body, and the interfaces are flatly connected, without intersection or engagement structure.

[0052] It can be understood that the application is described by some embodiments, and those skilled in the art know that various changes or equivalent replacements can be made to the features and embodiments without departing from the spirit and scope of the application. In addition, under the guidance of the application, the features and embodiments can be modified to adapt to specific conditions and materials without departing from the spirit and scope of the application. Therefore, the application is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application are within the scope of the application.

Claims

1. A multifunctional integrated interface for on-orbit assembly of modular space facilities, characterized by: The drive ring, the coupling ring, the fixed ring, the support structure, the upper cover plate, the spring pin, the digital electric heating assembly, the pin ring, the rotating base and the fixed base are provided. The upper cover plate and the fixed base are connected by the support structure and form a circular cavity structure, the fixed ring, the coupling ring, the drive ring and the pin ring are sequentially sleeved from inside to outside and arranged in the circular cavity structure, The drive ring is drivingly connected with the pin ring and can drive the pin ring to move up and down, the pin ring is used for realizing alignment positioning of the interface, the drive ring and the fixed ring are matched by the coupling pin and can drive the coupling ring to move up and down, the coupling ring is used for realizing locking function of the interface, the lower end of the rotating base is drivingly connected with the drive ring, the upper end of the rotating base penetrates through the fixed ring and is connected with the digital electric heating assembly, the drive ring drives the digital electric heating assembly to move up and down through the rotating base, and the digital electric heating assembly is used for realizing data transmission and power transmission function in cooperation with the opposite interface. The outer wall of the drive ring is provided with a drive gear and a drive ring outer groove line, the inner wall is provided with a drive ring inner groove line, the bottom is provided with an outer gear, and the top is provided with a drive ring top end lock hook. The drive ring outer groove line is matched with the inner side guide pin of the pin ring; and the drive ring inner groove line is matched with the coupling ring through the coupling pin. The outer circumferential surface of the pin ring is provided with an outer side guide pin, the inner circumferential surface is provided with an inner side guide pin, and the outer edge of the upper surface is provided with a positioning pin; the pin ring is matched with the vertical groove line of the support structure through the outer side guide pin, and is matched with the drive ring outer groove line through the inner side guide pin, so as to realize linear motion of the pin ring up and down, so that the positioning pin can be butted with the conical hole of the opposite interface.

2. A multi-functional integrated interface for modular space facility on-orbit assembly according to claim 1, characterized by: The drive ring is a cylindrical structure, The drive ring is meshed with the external motor through the drive gear; the drive ring is meshed with the inner gear of the rotating base through the outer gear at the bottom; the top of the coupling ring is provided with a top lock hook, when the interface is used as an active end, the top lock hook is interlocked with the drive ring top end lock hook of the opposite interface; when the interface is used as a passive end, the drive ring top end lock hook is interlocked with the coupling ring lock hook of the opposite interface.

3. A multi-functional integrated interface for modular space facility on-orbit assembly according to claim 2, characterized by: The coupling ring and the fixed ring are both cylindrical structures, the outer wall of the fixed ring is provided with a groove line, the bottom of the coupling ring is provided with a coupling hole, the coupling pin penetrates through the coupling hole and is matched with the drive ring inner groove line and the groove line of the fixed ring at both ends.

4. A multi-functional integrated interface for modular space facility on-orbit assembly according to claim 3, characterized by: The matching design of the groove line of the fixed ring and the drive ring inner groove line satisfies the space cam principle, so that the coupling pin can realize self-locking condition in the movement process, and the coupling pin can realize rotation and translation compound motion.

5. A multi-functional integrated interface for modular space facility on-orbit assembly according to claim 4, characterized by: The bottom of the fixed ring is provided with a fixed hole, and the top is provided with a positioning hole one; the fixed hole is connected with the bolt hole three of the fixed base through the connecting bolt, and the positioning hole one is connected with the positioning hole three of the digital electric heating assembly through the spring pin.

6. A multi-functional integrated interface for modular space facility on-orbit assembly according to claim 2, characterized by: The pin ring is an annular thin plate structure, and the track design of the drive ring outer groove line conforms to the cylindrical cam principle.

7. A multi-functional integrated interface for modular space facility on-orbit assembly according to claim 6, characterized by: The support structure is three independent arc-shaped plates, the inner side of each independent arc-shaped plate is provided with a vertical groove line matched with the outer side guide pin of the pin ring, so that the pin ring can only move up and down in the movement process, and the upper end and the lower end of each independent arc-shaped plate are connected with the upper cover plate and the fixed base through the bolt hole one and the connecting bolt.

8. A multi-functional integrated interface for modular space facility on-orbit assembly according to claim 7, characterized by: The upper cover plate is an annular thin plate, on which bolt holes two, positioning holes two and a conical hole are arranged; the bolt holes two of the upper cover plate are matched with the bolt holes one of the support structure, and are connected through connecting bolts; the positioning holes two allow the positioning pins of the pin ring to pass through; and the conical hole allows the positioning pin of the opposite active end interface to enter.

9. A multi-functional integrated interface for modular space facility on-orbit assembly according to claim 2, characterized by: The rotating base is a hollow thin plate with a boss in the middle; an internal gear is arranged on the upper surface of the hollow thin plate part; three annular grooves are formed around the boss in the hollow thin plate part; the top of the boss part is a slope and a step which jointly constitute a step surface; the internal gear is engaged with the bottom external gear of the driving ring; the annular grooves allow the fixed base and the fixed ring to be connected through connecting bolts; the slope is matched with the rolling bearing of the digital electric heating assembly, allowing the rolling bearing to slide along the slope and simultaneously driving the digital electric heating assembly to move up and down; and the step is matched with the rolling bearing of the digital electric heating assembly, keeping the rising height of the rolling bearing.

10. A multi-functional integrated interface for modular space facility on-orbit assembly according to claim 2, characterized by: The digital electric heating assembly comprises a cylindrical support structure at the lowermost layer, an annular thin plate at the middle layer and a circuit board at the uppermost layer, and the three are connected and fixed through bolts; the annular thin plate is provided with a heat exchange interface; the circuit board provides support for the contact type plug; and the rolling bearing and the positioning hole three are arranged on the outer circumferential surface of the support structure.

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