CN107902107B - Six-unit cube star main bearing structure - Google Patents
Six-unit cube star main bearing structure Download PDFInfo
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- CN107902107B CN107902107B CN201711147258.4A CN201711147258A CN107902107B CN 107902107 B CN107902107 B CN 107902107B CN 201711147258 A CN201711147258 A CN 201711147258A CN 107902107 B CN107902107 B CN 107902107B
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- B64G1/10—Artificial satellites; Systems of such satellites; Interplanetary vehicles
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Abstract
The invention discloses a six-unit cube star main bearing structure, which is formed by matching two three-unit cube star main frames through a connecting frame, wherein the main frames are of cuboid frame structures, end covers are arranged at two ends of the main frames along the long side direction, a middle framework is arranged at the middle position of the main frames, four screws are arranged in the main frames, penetrate through the middle framework and are fixed on end covers at two ends of the main frames, and six hinges are arranged on the connecting frame and the two main frames; the assembly difficulty of the cube star is reduced, and the integrity of the internal layout is improved. The main frame is of an integrated structure and is connected through the connecting frame in large-area contact, so that the parallelism between the guide rails can be ensured, the satellite and arrow separating device is not blocked during launching, and the successful launching is ensured.
Description
Technical Field
The invention belongs to the technical field of cube satellites, and particularly relates to a six-unit cube satellite main bearing structure.
Background
In recent years, with rapid development of technologies such as communication, photoelectric elements, materials, sensors, application fluids and the like, development of the technology of the cube star is accelerated remarkably, and remote measurement and test by using the cube star are possible. The low cost has prompted the advent of world-wide cube star development programs. More and more of them come from government, business, and especially academic institutions with strong scientific strength. A large number of cubes have been transmitted in the united states and europe.
The cube satellite (cube satellite for short) belongs to the category of micro-nano satellites, has extremely rapid development, and is standardized, modularized and commercialized at present. The cube star is jointly proposed by the space system laboratory of State university of California and Stanford university in 1999, and meanwhile, an independent cube star (cube sat) design standard is formulated, so that engineers are facilitated to follow specific principles of the cube star when carrying out microsatellite design, and the modularized design of a satellite platform system is mainly carried out, thereby shortening the research and development period and saving the development cost. The satellite remote sensing system aims to enable universities, colleges and universities or private enterprises to develop low-cost scientific researches, launch space loads and conduct international cooperation, and enable students to obtain practical experience of satellite development, launching and remote sensing.
Besides the general principle of satellite design and the possession of some independent design criteria, there is a strict interaction interface between the cube and the launch vehicle, and a special satellite-rocket separation mechanism is used. The structure of the cube star is simple, the size of a unit cube star (1U cube) is 100mm multiplied by 100mm, and the weight is not more than 1.33kg; the size of the 2U cube star is 100mm multiplied by 227mm, and the weight is not more than 2.66Kg; the 3U cube star has the size of 100mm multiplied by 340mm, the weight is not more than 4kg, the task of one cube star takes two years at most from the beginning to the end, and the total cost is only 5 to 10 ten thousand Euro. If the task requires, the cube can be expanded to 6U, 12U or even 27U.
At present, various cube star structures, including commercial and autonomous development, are developed, and cube star structure design technologies are developed in a hundred-flower and uniform state. For example: space innovation scheme company (ISIS) is a company focused on making satellite systems more compact by designing, manufacturing, and improving micro-nano satellite subsystems. The designed main structure of a unit cube star (100 mm multiplied by 100 mm) consists of two modularized large parts and four connected small parts through M3 multiplied by 6 screws; on the other hand, there are also many universities and organizations that choose to design and manufacture the cube star structures themselves.
However, for six-unit cube stars (100 mm×226mm×340.5 mm), all the six-unit cube stars are connected into a main structure frame by frame members and rib members through screws, and as the 4 guide rails consist of 2 parts or even 4 parts, the parallelism among the 4 guide rails is difficult to ensure. This is also extremely important for a cube star, as it concerns the success or failure of the cube star emission. The launching of the cubic star is to push the cubic star into the space under the action of the thrust of a spring through a star arrow separation device-POD. The contact between the cube star and the POD is the sliding fit between the 4 guide rails and the groove-shaped guide rails which are parallel to each other in the POD, so that once the parallelism between the 4 guide rails of the cube star is not guaranteed, the phenomenon of locking easily occurs, and the cube star cannot be pushed into the space directly. This means that the transmission failed, and nothing is significant.
Disclosure of Invention
The invention aims to provide a six-unit cube star main bearing structure, which reduces the assembly difficulty of cube stars, improves the integrity of internal layout, can ensure the parallelism between guide rails, is not blocked with a satellite and arrow separating device during launching, and ensures the successful launching.
The technical scheme of the invention is as follows: the six-unit cube star main bearing structure comprises a connecting frame, a first cube star unit, a second cube star unit and six hinges, wherein the first cube star unit and the second cube star unit are symmetrically fixed on two sides of the connecting frame; two hinges are respectively arranged on the connecting frame, the first cube-shaped unit and the second cube-shaped unit.
The connecting frame adopts an escalator structure and comprises two side plates and four connecting plates connected with the two side plates, wherein the two side plates are arranged in parallel, one connecting plate is positioned on the top surface of the side plate, the other connecting plate is positioned on the bottom surface of the side plate, and the rest two spaces are arranged between the two connecting plates.
Grooves are arranged on the side plates at the joint of the two connecting plates and the side plates in the middle and are used for connecting other devices; hinge mounting grooves are respectively formed in the upper portions of the two side plates, the hinge mounting grooves are close to the uppermost connecting plate and located below the uppermost connecting plate, and the hinges are fixed in the hinge mounting grooves.
The first cube star unit comprises a first main frame, a first hypersensitive bracket, a first back plate, two first middle square frameworks, four screws, two first square end covers and eight end nuts, wherein the first main frame is a cuboid and comprises four upright posts and a plurality of connecting rods, the connecting rods are used for connecting the two adjacent upright posts to improve the overall rigidity of the first cube star unit, the first back plate is fixed on the back of the cuboid, the four screws are respectively close to the four upright posts, the two first middle square frameworks are arranged in the first main frame in parallel and are in clearance fit with the four screws, and the two first square end covers are respectively positioned at the top and the bottom of the first main frame and are fixedly connected with the four screws through the eight end nuts; the outer side wall of the first middle square framework is fixedly connected with the connecting rod, and the outer side wall of the first square end cover is fixedly connected with the connecting rod; the first too quick support is fixed in the top surface that is located the first square end cover at top, and two hinges symmetric distribution are in the front and the back of first main frame, highly the same with the hinge on the link, and be located the one end of keeping away from the link, and first main frame sets up in one side of link, links firmly with the link through square skeleton in the middle of two first and two first square end covers.
The first hypersensitive support comprises a first mounting flat plate and a first support, the first support is fixedly connected to the bottom surface of the first mounting flat plate and is far away from one end of the connecting frame, and the hypersensitive mounting surface of the first support is parallel to the connecting surface of the connecting frame and the first main frame.
The second cube star unit comprises a second main frame, a second hypersensitive bracket, a second backboard, two second middle square frameworks, two second square end covers and three side plates, wherein the second main frame is a cuboid and comprises four upright posts and a plurality of connecting rods, the connecting rods are used for connecting the two adjacent upright posts to improve the overall rigidity of the second cube star unit, the second backboard is fixed on the back of the cuboid, the two second middle square frameworks are arranged in the second main frame in parallel, and the two second end covers are respectively positioned at the top and the bottom of the second main frame; the outer side wall of the second middle square framework is fixedly connected with the connecting rod, and the outer side wall of the second end cover is fixedly connected with the connecting rod; the second hypersensitive bracket is fixed on the top surface of the second end cover positioned at the top, and two hinges are symmetrically distributed on the front surface and the back surface of the second main frame, have the same height as the hinges on the connecting frame and are positioned at one end far away from the connecting frame; the three side plates are fixed at the middle section of the second main frame, and the second main frame of the middle section is wrapped by combining the second backboard; the second main frame is arranged on the other side of the connecting frame and is fixedly connected with the connecting plate through two second middle square skeleton side plates and two second square end covers.
The second hypersensitive support comprises a second installation flat plate and a second support, the second installation flat plate is provided with a hypersensitive installation hole and a GPS antenna installation hole, the second support is fixedly connected to the bottom surface of the second installation flat plate and is far away from one end of the connecting frame, and the hypersensitive installation surface of the second support is parallel to the connection surface of the connecting frame and the second main frame.
Compared with the prior art, the invention has the remarkable advantages that:
(1) Because the two main frames are of an integrated structure, are connected through the connecting frame in contact with a large area and are buckled in the side plates of the connecting frame, the parallelism between the guide rails can be ensured, the satellite and arrow separating device is prevented from being blocked, and the successful launching is ensured.
(2) The invention has light weight, completely meets the requirements of miniaturization and light weight of the cube satellite, reduces the limit on the quality and space of other systems and improves the functional density of the cube satellite.
(3) The external dimension of the structure of the invention is 100mm multiplied by 226mm multiplied by 340.5mm, which accords with the design standard of a cube satellite, and can be used for separating satellites and arrows by using standard 6U-POD.
(4) According to the invention, in the assembly process of the cube star, the internal PCB, the two square end covers, the two middle square frameworks, the screw rod and the end nuts can be assembled, then the assembly is sleeved into the main frame integrally, and finally the two main frames are connected through the connecting frame, so that the difficulty in the assembly process is greatly reduced, and meanwhile, the integrity of the internal layout is improved.
(5) The invention has good structural integrity and strong overall shock resistance and vibration resistance, and can ensure the normal work of the cube star.
(6) In the invention, two main frames are respectively provided with a backboard with complete structure, and a sprayable heat control coating is used as a radiating surface.
(7) The invention has simple structure, good reliability, low processing cost and strong practicability, and is very suitable for the cube satellite with quick response and short task period.
(8) According to the hinge mechanism, the hinge of the solar cell array can be accurately unfolded by 90 degrees through the design of unfolding the hinge of the solar cell array through the torsion springs, and a solar cell array with a larger area is effectively provided.
Drawings
FIG. 1 is a schematic diagram of a six-cell cube star master load carrying structure of the present invention.
FIG. 2 is a schematic diagram of the overall structure of the six-unit cube star master load carrying structure of the present invention.
FIG. 3 is a schematic view of a link in a six-unit cube star master load carrying structure of the present invention.
Fig. 4 is a schematic diagram of an end cap in a six-cell cube star master load bearing structure of the present invention.
FIG. 5 is a schematic diagram of an intermediate skeleton in a six-unit cube star master load-bearing structure of the present invention.
Fig. 6 is a schematic view of an end nut in a six-cell cube-star master load bearing structure of the present invention.
Fig. 7 is a schematic view of a hypersensitive bracket in a six-unit cube star master load bearing structure of the present invention.
Fig. 8 is a schematic view of a hinge in a six-unit cube star master load-bearing structure of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
Referring to fig. 1-8, the invention provides a six-unit cube star main bearing structure, which comprises a first cube star unit 1, a second cube star unit 2, a connecting frame 3 and six hinges 4, wherein the first cube star unit 1 and the second cube star unit 2 are symmetrically fixed on two sides of the connecting frame 3 and are respectively connected through eight screws; two hinges 4 are respectively arranged on the connecting frame 3, the first cube star unit 1 and the second cube star unit 2.
The connecting frame 3 adopts an escalator structure and comprises two side plates 3-1 and four connecting plates 3-2 used for connecting the two side plates 3-1, the two side plates 3-1 are arranged in parallel, the two connecting plates 3-2 are positioned on the top surface and the bottom surface of the side plate 3-1, and the rest two spaces are arranged between the two connecting plates 3-2. The two side plates 3-1 are used for buckling the first main frame 1-1 and the second main frame 2-2, are in clearance fit, are 26mm thick except for the side edges of buckling parts, and are 226mm in size after buckling the two main frames. The connecting plate 3-2 is provided with sixteen through holes with two hole pitches for connecting the two main frames, and a square through hole is arranged in the middle of the connecting plate 3-2, so that weight reduction and cable arrangement are facilitated; the side of the side plate 3-1 is provided with two triangular section grooves, the space is used for fastening and connecting screws of the two main frames, one end of the long side direction is provided with two groups of threaded holes and hinge mounting grooves for connecting the hinges, and one end of the long side direction is provided with a through hole and a square hole for mounting a battery array unfolding switch. The two side plates 3-1 and the four connecting plates 3-2 of the connecting frame 3 are integrally formed and processed parts of Al 7075.
The first cube star unit 1 comprises a first main frame 1-1, two first middle square frameworks 1-2, four screw rods 1-3, two first square end covers 1-4, eight end nuts 1-5, a first sensitization bracket 1-8 and a first backboard 1-9, wherein the first main frame 1-1 is a cuboid and comprises four upright posts and a plurality of connecting rods, the four upright posts form a square with the cross section of 100mm multiplied by 100mm, the connecting rods are used for connecting the two adjacent upright posts to improve the overall rigidity of the cuboid, the first backboard 1-9 is fixed on the back of the cuboid, the sprayable heat control coating is used as a radiating surface, the four screw rods 1-3 are respectively arranged close to the four upright posts, the two first middle square frameworks 1-2 are arranged in the first main frame 1-1 in parallel, four through holes are arranged in clearance fit with the four screw rods 1-3, and the outer side wall of the first middle square frameworks 1-2 is fixedly connected with the connecting rods by screws; the two first square end covers 1-4 are respectively positioned at the top and the bottom of the first main frame 1-1, and are provided with four stepped holes which are the same as the shape of the end nuts 1-5, so that the end nuts 1-5 are not protruded to be connected with the mounting surface of the first hypersensitive bracket 1-8, two square support corners are provided with round holes and are used for placing a pressing cylinder and a spring of a satellite-rocket disconnecting switch, the four sides are provided with weight-reducing designs, the four support corners are fixedly connected with threads of the four screws 1-3 through the four end nuts 1-5, and the outer side wall of the first square end cover 1-4 is fixedly connected with a connecting rod through screws; the first hypersensitive bracket 1-8 is fixed on the top surface of the first square end cover 1-4 positioned at the top by using screws, and the first square end cover 1-4 is provided with eight threaded holes connected with the first hypersensitive bracket 1-8; the two hinges 4 are symmetrically distributed on the front and the back of the first main frame 1-1, have the same height as the hinges 4 on the connecting frame 3, are positioned at one end far away from the connecting frame 3 and are fixedly connected by using screws; the first main frame 1-1 is arranged on one side of the connecting frame 3 and is fixedly connected with the connecting plate 3-2 through two first middle square frameworks 1-2 and two first square end covers 1-4 by using screws. The shape of the end screw cap 1-5 is matched with four stepped holes on the first square end cap 1-4, the lower half part of the end screw cap is a thread matched with the screw 1-3, and the upper half part of the end screw cap is an inner hexagonal hole, so that the end screw cap is convenient to install by using an inner hexagonal wrench. The four upright posts of the first main frame 1-1, the plurality of connecting rods and the first backboard 1-9 are integrally formed and processed parts of Al 7075. The end nuts 1-5 and the screw rods 1-3 are made of titanium alloy, so that the required mechanical properties are met.
The first hypersensitive bracket 1-8 comprises a first installation flat plate and a first bracket, the first bracket is fixedly connected to the bottom surface of the first installation flat plate and is far away from one end of the connecting frame 3, the hypersensitive installation surface of the first bracket is parallel to the connecting surface of the connecting frame 3 and the first main frame 1-1, four threaded holes for connecting hypersensitive are formed in the first bracket, and eight through holes for connecting the square end cover are formed in the first installation flat plate. In order to ensure the precision of the sun sensor, a triangular rib plate is arranged at the position where the first bracket is fixedly connected with the first mounting flat plate so as to ensure the perpendicularity between the mounting surface of the sun sensor and the first mounting flat plate, and a mounting reference surface is arranged beside four threaded holes. The first mounting plate of the first hypersensitive bracket 1-8 and the first bracket are integrally formed and processed parts of Al 7075.
The second cube star unit 2 comprises a second main frame 2-1, two second middle square frameworks 2-2, two second square end covers 2-4, three side plates 2-5, a second hypersensitive bracket 2-8 and a second backboard 2-9, wherein the second main frame 2-1 is a cuboid and comprises four upright posts and a plurality of connecting rods, the four upright posts form a square with the cross section of 100mm multiplied by 100mm, the connecting rods are used for connecting two adjacent upright posts, the overall rigidity of the connecting rods is improved, the second backboard 2-9 is fixed on the back of the cuboid, and a sprayable heat control coating is used as a radiating surface; the two second middle square frameworks 2-2 are arranged in the second main framework 2-1 in parallel, and the outer side wall of the second middle square frameworks 2-2 is fixedly connected with the connecting rod by using screws; the two second end covers 2-4 are respectively positioned at the top and the bottom of the second main frame 2-1, two square and round holes are arranged at the four branch corners of the second end covers, a pressing cylinder and a spring for placing a satellite and rocket disconnecting switch are arranged at the four sides of the second end covers, the weight of the pressing cylinder and the spring is reduced, and the outer side walls of the second end covers 2-4 are fixedly connected with a connecting rod through screws; the second hypersensitive bracket 2-8 is fixed on the top surface of the second end cover 2-4 positioned at the top by using screws, and the second square end cover 2-4 is provided with eight threaded holes connected with the second hypersensitive bracket 2-8; the two hinges 4 are symmetrically distributed on the front and the back of the second main frame 2-1, have the same height as the hinges 4 on the connecting frame 3, are positioned at one end far away from the connecting frame 3 and are fixedly connected by using screws; the three side plates 2-5 are fixed at the middle section of the second main frame 2-1, and the second main frame 2-1 of the middle section is wrapped by combining the second backboard 2-9 to form a square with the cross section of 100mm multiplied by 100 mm; the second main frame 2-1 is arranged on the other side of the connecting frame 3 and is fixedly connected with the connecting plate 3-2 through two second middle square frameworks 2-2, side plates 2-5 and two second square end covers 2-4 by using screws. Four upright posts, a plurality of connecting rods and side plates 2-5 of the second main frame 2-1 and the second backboard 2-9 are integrally formed processing parts of Al 7075.
The second hypersensitive bracket 2-8 comprises a second installation flat plate and a second bracket, the second installation flat plate is provided with an installation hole for installing a hypersensitive GPS antenna, a threaded hole and two grooves for reducing weight, the second bracket is fixedly connected to the bottom surface of the second installation flat plate and is far away from one end of the connecting frame 3, the hypersensitive installation surface of the second bracket is parallel to the connecting surface of the connecting frame 3 and the second main frame 2-1, the second bracket is provided with four threaded holes for connecting the hypersensitive, and the second installation flat plate is provided with eight through holes for connecting square end covers. In order to ensure the precision of the sun sensor, a triangular rib plate is arranged at the position where the second bracket is fixedly connected with the second mounting flat plate so as to ensure the perpendicularity between the mounting surface of the sun sensor and the second mounting flat plate, and a mounting reference surface is arranged beside four threaded holes. The second mounting plate of the second hypersensitive bracket 1-8 and the second bracket are integrally formed and processed parts of Al 7075.
During assembly, four screws 1-3 are fixed on one first square end cover 1-4 through end nuts 1-5, PCB boards are stacked on the screws 1-3, two first middle square frameworks 1-2 are inserted between the PCB boards, the screws 3 are in clearance fit with the first middle square frameworks 1-2 which pass through, the end nuts 1-5 of the screws 3 are fixed on the other first square end cover 1-4, and then the first main framework 1-1 is sleeved integrally; the first middle square framework 1-2 and the first square end cover 1-4, the second middle square framework 2-2 and the second square end cover 2-4 are provided with threaded holes for connecting the connecting frame 3, eight screws are used for connecting the connecting frame 3 and the first main frame 1 through the through holes with smaller hole pitches on the connecting frame 3, and then the screws are used for connecting the second main frame 2-1 through the through holes with larger hole pitches on the connecting frame 3; six hinges 4 are fixed on the first main frame 1-1, the second main frame 2-1 and the connecting frame 3 through screws, and the hinges 4 are provided with three threaded holes for connecting and expanding the solar cell array substrate; the first and second hypersensitive brackets 1-8 and 2-8 are fixed on the first and second square end covers 1-4 and 2-4 by screws, and are provided with threaded holes for connecting a sun sensor and a GPS antenna; through holes for connecting solar cell array substrates are formed in each surface of the first main frame 1-1 and each surface of the second main frame 2-1, threaded holes for connecting the solar cell array substrates are formed in the first middle square framework 1-2 and the first square end cover 1-4, and threaded holes for connecting the solar cell array substrates are formed in the second middle square framework 2-2 and the second square end cover 2-4, so that the solar cell array can be installed.
The hinge 4 comprises a fixed part, a movable part, a rotating shaft, a torsion spring and an inner hexagon set screw, under the installation state, six hinges 4 are fixed on the first main frame 1-1, the second main frame 2-1 and the connecting frame 3 through screws, the fixed part and the movable part form a plane, the torsion spring has larger torque, and after the torsion spring is released, the movable part and the unfolding solar cell array substrate are driven to rotate around the rotating shaft, and finally the fixed part and the movable part form 90 degrees, so that the unfolding solar cell array function is realized. Four threaded holes for connecting the first main frame 1-1, the second main frame 2-1 and the connecting frame 3 are formed in the fixing piece, and three threaded holes for connecting and unfolding the solar cell array substrate are formed in the movable piece. (disclosed in CN 105840647A)
Examples
The invention relates to a six-unit cube star main bearing structure, which comprises a first cube star unit 1, a second cube star unit 2, a connecting frame 3 and six hinges 4, wherein the first cube star unit 1 and the second cube star unit 2 are symmetrically fixed on two sides of the connecting frame 3 and are respectively connected through eight screws; two hinges 4 are respectively arranged on the connecting frame 3, the first cube star unit 1 and the second cube star unit 2.
The connecting frame 3 adopts an escalator structure and comprises two side plates 3-1 and four connecting plates 3-2 used for connecting the two side plates 3-1, the two side plates 3-1 are arranged in parallel, the two connecting plates 3-2 are positioned on the top surface and the bottom surface of the side plate 3-1, and the rest two spaces are arranged between the two connecting plates 3-2. The two side plates 3-1 are used for buckling the first main frame 1-1 and the second main frame 2-2, are in clearance fit, are 26mm thick except for the side edges of buckling parts, and are 226mm in size after buckling the two main frames. The connecting plate 3-2 is provided with sixteen through holes with two hole pitches for connecting the two main frames, and a square through hole is arranged in the middle of the connecting plate 3-2, so that weight reduction and cable arrangement are facilitated; the side of the side plate 3-1 is provided with two triangular section grooves, the space is used for fastening and connecting screws of the two main frames, one end of the long side direction is provided with two groups of threaded holes and hinge mounting grooves for connecting the hinges, and one end of the long side direction is provided with a through hole and a square hole for mounting a battery array unfolding switch. The two side plates 3-1 and the four connecting plates 3-2 of the connecting frame 3 are integrally formed and processed parts of Al7075 and are formed by processing a whole piece of aluminum alloy.
The first cube star unit 1 comprises a first main frame 1-1, two first middle square frameworks 1-2, four screw rods 1-3, two first square end covers 1-4, eight end nuts 1-5, a first sensitization bracket 1-8 and a first backboard 1-9, wherein the first main frame 1-1 is a cuboid and comprises four upright posts and a plurality of connecting rods, the four upright posts form a square with the cross section of 100mm multiplied by 100mm, the connecting rods are used for connecting the two adjacent upright posts to improve the overall rigidity of the cuboid, the first backboard 1-9 is fixed on the back of the cuboid, the sprayable heat control coating is used as a radiating surface, the four screw rods 1-3 are respectively arranged close to the four upright posts, the two first middle square frameworks 1-2 are arranged in the first main frame 1-1 in parallel, four through holes are arranged in clearance fit with the four screw rods 1-3, and the outer side wall of the first middle square frameworks 1-2 is fixedly connected with the connecting rods by screws; the two first square end covers 1-4 are respectively positioned at the top and the bottom of the first main frame 1-1, and are provided with four stepped holes which are the same as the shape of the end nuts 1-5, so that the end nuts 1-5 are not protruded to be connected with the mounting surface of the first hypersensitive bracket 1-8, two square support corners are provided with round holes and are used for placing a pressing cylinder and a spring of a satellite-rocket disconnecting switch, the four sides are provided with weight-reducing designs, the four support corners are fixedly connected with threads of the four screws 1-3 through the four end nuts 1-5, and the outer side wall of the first square end cover 1-4 is fixedly connected with a connecting rod through screws; the first hypersensitive bracket 1-8 is fixed on the top surface of the first square end cover 1-4 positioned at the top by using screws, and the first square end cover 1-4 is provided with eight threaded holes connected with the first hypersensitive bracket 1-8; the two hinges 4 are symmetrically distributed on the front and the back of the first main frame 1-1, have the same height as the hinges 4 on the connecting frame 3, are positioned at one end far away from the connecting frame 3 and are fixedly connected by using screws; the first main frame 1-1 is arranged on one side of the connecting frame 3 and is fixedly connected with the connecting plate 3-2 through two first middle square frameworks 1-2 and two first square end covers 1-4 by using screws. The shape of the end screw cap 1-5 is matched with four stepped holes on the first square end cap 1-4, the lower half part of the end screw cap is a thread matched with the screw 1-3, and the upper half part of the end screw cap is an inner hexagonal hole, so that the end screw cap is convenient to install by using an inner hexagonal wrench. The four upright posts of the first main frame 1-1, the plurality of connecting rods and the first backboard 1-9 are integrally formed and processed parts of Al7075 and are formed by processing a whole piece of aluminum alloy. The end nuts 1-5 and the screw rods 1-3 are made of titanium alloy, so that the required mechanical properties are met. The four upright posts of the first main frame 2-1 and a plurality of connecting rods form square or rectangular hollow holes, and heat control multilayer materials are arranged at the positions of the square or rectangular hollow holes to play a role in heat preservation and heat insulation. A thermal control coating is sprayed on the first back plate 1-9 to serve as a radiating surface.
The first hypersensitive bracket 1-8 comprises a first installation flat plate and a first bracket, the first bracket is fixedly connected to the bottom surface of the first installation flat plate and is far away from one end of the connecting frame 3, the hypersensitive installation surface of the first bracket is parallel to the connecting surface of the connecting frame 3 and the first main frame 1-1, four threaded holes for connecting hypersensitive are formed in the first bracket, and eight through holes for connecting the square end cover are formed in the first installation flat plate. In order to ensure the precision of the sun sensor, a triangular rib plate is arranged at the position where the first bracket is fixedly connected with the first mounting flat plate so as to ensure the perpendicularity between the mounting surface of the sun sensor and the first mounting flat plate, and a mounting reference surface is arranged beside four threaded holes. The first mounting plate of the first hypersensitive bracket 1-8 and the first bracket are integrally formed and processed parts of Al7075 and are formed by processing a whole piece of aluminum alloy.
The second cube star unit 2 comprises a second main frame 2-1, two second middle square frameworks 2-2, two second square end covers 2-4, three side plates 2-5, a second hypersensitive bracket 2-8 and a second backboard 2-9, wherein the second main frame 2-1 is a cuboid and comprises four upright posts and a plurality of connecting rods, the four upright posts form a square with the cross section of 100mm multiplied by 100mm, the connecting rods are used for connecting two adjacent upright posts, the overall rigidity of the connecting rods is improved, the second backboard 2-9 is fixed on the back of the cuboid, and a sprayable heat control coating is used as a radiating surface; the two second middle square frameworks 2-2 are arranged in the second main framework 2-1 in parallel, and the outer side wall of the second middle square frameworks 2-2 is fixedly connected with the connecting rod by using screws; the two second end covers 2-4 are respectively positioned at the top and the bottom of the second main frame 2-1, two square and round holes are arranged at the four branch corners of the second end covers, a pressing cylinder and a spring for placing a satellite and rocket disconnecting switch are arranged at the four sides of the second end covers, the weight of the pressing cylinder and the spring is reduced, and the outer side walls of the second end covers 2-4 are fixedly connected with a connecting rod through screws; the second hypersensitive bracket 2-8 is fixed on the top surface of the second end cover 2-4 positioned at the top by using screws, and the second square end cover 2-4 is provided with eight threaded holes connected with the second hypersensitive bracket 2-8; the two hinges 4 are symmetrically distributed on the front and the back of the second main frame 2-1, have the same height as the hinges 4 on the connecting frame 3, are positioned at one end far away from the connecting frame 3 and are fixedly connected by using screws; the three side plates 2-5 are fixed at the middle section of the second main frame 2-1, and the second main frame 2-1 of the middle section is wrapped by combining the second backboard 2-9 to form a square with the cross section of 100mm multiplied by 100 mm; the second main frame 2-1 is arranged on the other side of the connecting frame 3 and is fixedly connected with the connecting plate 3-2 through two second middle square frameworks 2-2, side plates 2-5 and two second square end covers 2-4 by using screws. The four upright posts, the plurality of connecting rods, the side plates 2-5 and the second backboard 2-9 of the second main frame 2-1 are integrally formed processing parts of Al7075, and are formed by processing a whole piece of aluminum alloy. The four upright posts of the second main frame 2-1, a plurality of connecting rods and square or rectangular hollow holes formed by the side plates 2-5 are provided with heat control multi-layer materials, so that the heat preservation and heat insulation effects are achieved. A thermal control coating is sprayed on the second back plate 2-9 to serve as a radiating surface.
The second hypersensitive bracket 2-8 comprises a second installation flat plate and a second bracket, the second installation flat plate is provided with an installation hole for installing a hypersensitive GPS antenna, a threaded hole and two grooves for reducing weight, the second bracket is fixedly connected to the bottom surface of the second installation flat plate and is far away from one end of the connecting frame 3, the hypersensitive installation surface of the second bracket is parallel to the connecting surface of the connecting frame 3 and the second main frame 2-1, the second bracket is provided with four threaded holes for connecting the hypersensitive, and the second installation flat plate is provided with eight through holes for connecting square end covers. In order to ensure the precision of the sun sensor, a triangular rib plate is arranged at the position where the second bracket is fixedly connected with the second mounting flat plate so as to ensure the perpendicularity between the mounting surface of the sun sensor and the second mounting flat plate, and a mounting reference surface is arranged beside four threaded holes. The second mounting plate of the second hypersensitive bracket 1-8 and the second bracket are integrally formed and processed parts of Al7075 and are formed by processing a whole piece of aluminum alloy.
During assembly, four screws 1-3 are fixed on one first square end cover 1-4 through end nuts 1-5, PCB boards are stacked on the screws 1-3, two first middle square frameworks 1-2 are inserted between the PCB boards, the screws 3 are in clearance fit with the first middle square frameworks 1-2 which pass through, the end nuts 1-5 of the screws 3 are fixed on the other first square end cover 1-4, and then the first main framework 1-1 is sleeved integrally; the first middle square framework 1-2 and the first square end cover 1-4, the second middle square framework 2-2 and the second square end cover 2-4 are provided with threaded holes for connecting the connecting frame 3, eight screws are used for connecting the connecting frame 3 and the first main frame 1 through the through holes with smaller hole pitches on the connecting frame 3, and then the screws are used for connecting the second main frame 2-1 through the through holes with larger hole pitches on the connecting frame 3; six hinges 4 are fixed on the first main frame 1-1, the second main frame 2-1 and the connecting frame 3 through screws, and the hinges 4 are provided with three threaded holes for connecting and expanding the solar cell array substrate; the first and second hypersensitive brackets 1-8 and 2-8 are fixed on the first and second square end covers 1-4 and 2-4 by screws, and are provided with threaded holes for connecting a sun sensor and a GPS antenna; through holes for connecting solar cell array substrates are formed in each surface of the first main frame 1-1 and each surface of the second main frame 2-1, threaded holes for connecting the solar cell array substrates are formed in the first middle square framework 1-2 and the first square end cover 1-4, and threaded holes for connecting the solar cell array substrates are formed in the second middle square framework 2-2 and the second square end cover 2-4, so that the solar cell array can be installed.
The hinge 4 comprises a fixed part, a movable part, a rotating shaft, a torsion spring and an inner hexagon set screw, under the installation state, six hinges 4 are fixed on the first main frame 1-1, the second main frame 2-1 and the connecting frame 3 through screws, the fixed part and the movable part form a plane, the torsion spring has larger torque, and after the torsion spring is released, the movable part and the unfolding solar cell array substrate are driven to rotate around the rotating shaft, and finally the fixed part and the movable part form 90 degrees, so that the unfolding solar cell array function is realized. Four threaded holes for connecting the first main frame 1-1, the second main frame 2-1 and the connecting frame 3 are formed in the fixing piece, and three threaded holes for connecting and unfolding the solar cell array substrate are formed in the movable piece. (disclosed in CN105840647 a).
Claims (4)
1. A six unit cube star main load-carrying structure which characterized in that: comprises a first cube star unit (1), a second cube star unit (2), a connecting frame (3) and six hinges (4), the first cube star unit (1) and the second cube star unit (2) are symmetrically fixed at two sides of the connecting frame (3); two hinges (4) are respectively arranged on the connecting frame (3), the first cube star unit (1) and the second cube star unit (2);
the connecting frame (3) adopts an escalator structure and comprises two first side plates (3-1) and four connecting plates (3-2) used for connecting the two first side plates (3-1), the two first side plates (3-1) are arranged in parallel, the two connecting plates (3-2) are positioned on the top surface and the bottom surface of the first side plates (3-1), and the rest two connecting plates (3-2) are arranged at intervals;
the first cube star unit (1) comprises a first main frame (1-1), two first middle square frameworks (1-2), four screw rods (1-3), two first square end covers (1-4) and eight end nuts (1-5), a first sensitization bracket (1-8) and a first backboard (1-9), wherein the first main frame (1-1) is cuboid and comprises four upright posts and a plurality of connecting rods, the connecting rods are used for connecting the two adjacent upright posts to improve the overall rigidity of the cuboid, the first backboard (1-9) is fixed on the back of the cuboid, the four screw rods (1-3) are arranged close to the four upright posts respectively, the two first middle square frameworks (1-2) are arranged in the first main frame (1-1) in parallel and are in clearance fit with the four screw rods (1-3), and the outer side wall of the first middle square frameworks (1-2) is fixedly connected with the connecting rods; the two first square end covers (1-4) are respectively positioned at the top and the bottom of the first main frame (1-1), and are fixedly connected with the four screws (1-3) through eight end nuts (1-5), and the outer side wall of the first square end cover (1-4) is fixedly connected with the connecting rod; the first hypersensitive bracket (1-8) is fixed on the top surface of the first square end cover (1-4) positioned at the top; the two hinges (4) are symmetrically distributed on the front and the back of the first main frame (1-1), have the same height as the hinges (4) on the connecting frame (3), and are positioned at one end far away from the connecting frame (3); the first main frame (1-1) is arranged at one side of the connecting frame (3) and is fixedly connected with the connecting plate (3-2) through two first middle square frameworks (1-2) and two first square end covers (1-4);
the second cube star unit (2) comprises a second main frame (2-1), two second middle square frameworks (2-2), two second square end covers (2-4) and three second side plates (2-5), a second hypersensitive bracket (2-8) and a second backboard (2-9), the second main frame (2-1) is a cuboid and comprises four upright posts and a plurality of connecting rods, the connecting rods are used for connecting two adjacent upright posts, the overall rigidity of the connecting rods is improved, and the second backboard (2-9) is fixed on the back of the cuboid; the two second middle square frameworks (2-2) are arranged in the second main framework (2-1) in parallel, and the outer side wall of the second middle square frameworks (2-2) is fixedly connected with the connecting rod; the two second square end covers (2-4) are respectively positioned at the top and the bottom of the second main frame (2-1), and the outer side wall of the second square end cover (2-4) is fixedly connected with the connecting rod; the second hypersensitive bracket (2-8) is fixed on the top surface of the second square end cover (2-4) positioned at the top; the two hinges (4) are symmetrically distributed on the front and the back of the second main frame (2-1), have the same height as the hinges (4) on the connecting frame (3), and are positioned at one end far away from the connecting frame (3); the three second side plates (2-5) are fixed at the middle section of the second main frame (2-1), and the second main frame (2-1) of the middle section is wrapped by combining the second backboard (2-9); the second main frame (2-1) is arranged on the other side of the connecting frame (3) and is fixedly connected with the connecting plate (3-2) through two second middle square frameworks (2-2), a second side plate (2-5) and two second square end covers (2-4).
2. The six-unit cube star master load-carrying structure of claim 1 wherein: a groove is arranged on the first side plate (3-1) at the joint of the two connecting plates (3-2) and the first side plate (3-1) in the middle and is used for connecting other devices; hinge mounting grooves are respectively formed in the upper parts of the two first side plates (3-1), the hinge mounting grooves are close to the uppermost connecting plate (3-2) and located below the uppermost connecting plate, and the hinges (4) are fixed in the hinge mounting grooves.
3. The six-unit cube star master load-carrying structure of claim 1 wherein: the first hypersensitive bracket (1-8) comprises a first mounting flat plate and a first bracket, the first bracket is fixedly connected to the bottom surface of the first mounting flat plate and is far away from one end of the connecting frame (3), and the hypersensitive mounting surface of the first bracket is parallel to the connecting surface of the connecting frame (3) and the first main frame (1-1).
4. The six-unit cube star master load-carrying structure of claim 1 wherein: the second hypersensitive bracket (2-8) comprises a second installation flat plate and a second bracket, the second installation flat plate is provided with a hypersensitive installation hole and a GPS antenna installation hole, the second bracket is fixedly connected to the bottom surface of the second installation flat plate and is far away from one end of the connecting frame (3), and the hypersensitive installation surface of the second bracket is parallel to the connection surface of the connecting frame (3) and the second main frame (2-1).
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| CN108516105A (en) * | 2018-06-25 | 2018-09-11 | 最终前沿深空科技（深圳）有限公司 | One cell cube micro-nano satellite structure |
| CN109050989B (en) * | 2018-08-29 | 2021-07-27 | 上海宇航系统工程研究所 | Double-star point type adapter |
| CN110550235B (en) * | 2019-09-24 | 2021-03-02 | 四川省电子信息产业技术研究院有限公司 | Micro-nano satellite platform |
| CN113291491B (en) * | 2021-07-16 | 2022-09-27 | 北京智星空间技术研究院有限公司 | Six-unit cubic micro-nano satellite main bearing structure |
| CN114771875B (en) * | 2022-05-06 | 2023-09-01 | 南京理工大学 | Design method of direct-insert type main bearing structure of high-heat-flow-density cube star |
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