CN113993339A

CN113993339A - Cable-free case

Info

Publication number: CN113993339A
Application number: CN202111570144.7A
Authority: CN
Inventors: 裴浩; 尹继; 靳昊鑫; 庞斌; 杨雨昊; 王志勇
Original assignee: Beijing Institute of Electronic System Engineering; Sichuan Huafeng Technology Co Ltd
Current assignee: Beijing Institute of Electronic System Engineering; Sichuan Huafeng Technology Co Ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-01-28
Anticipated expiration: 2041-12-21
Also published as: CN113993339B

Abstract

The invention discloses a cableless case, which comprises an integrated case; a plurality of functional module mounting grooves are formed in the integrated case, one side of the integrated case, which is close to the rear cover, is provided with a cableless motherboard assembly, and the other side of the integrated case is embedded with a cableless panel assembly; the untethered panel assembly includes a panel body; a multilayer printed board is arranged in the panel body; the upper surface of the multilayer printed board is integrated with a first connector, a second connector, a floating installation socket, a switch and an indicator light; and a power filter and a three-cavity connecting seat are integrated on the lower surface of the multilayer printed board. The integrated case is simple in structure, adopts modularized layout, and realizes cableless signal transmission among the functional modules, the cableless panel assemblies and the cableless motherboard assemblies, so that the internal structure of the integrated case is more compact and simpler, more spaces are provided for modularized layout, and the internal layout is more reasonable.

Description

Cable-free case

Technical Field

The invention belongs to the technical field of electrical cabinets, and particularly relates to a cable-free cabinet.

Background

The chassis generally includes a housing, brackets, various switches on the panel, indicator lights, electrical connections, and the like.

The electrical connection structure broadly refers to a collection of all electrical circuits in an electrical product, including power connection parts such as a power plug, a power connection terminal, etc., a power line, an internal wire, an internal connection part, etc.; electrical connections in the narrow sense are intended to refer to all ways of connecting different conductors within a product.

The electrical connection member provides electrical connection by providing a suitable mechanical force to securely hold the different conductor members together. The key role of the electrical connection component is to provide a reliable connection and avoid the danger of poor contact between different conductors. The electrical connection member is generally composed of a non-metal support member and a metal connection member, the non-metal support member is used as a support base, and is required to be capable of insulating in long-term operation, and also required to be capable of bearing heat generated by a supported conductor in use, and not to cause dangerous deformation, and to have a certain flame retardant rating, and not to become a potential fire source.

The existing internal structure of the case, the internal connector, each functional module and the connection between the connector and the functional module are mostly connected directly by cables, so that the cables are large in quantity, disordered in wiring, large in occupied space, strong in electromagnetic interference and difficult to transfer, detect, maintain and disassemble.

Disclosure of Invention

The present invention is directed to overcoming the above-mentioned shortcomings in the prior art and providing a cable-less enclosure to solve or improve the above-mentioned problems.

In order to achieve the purpose, the invention adopts the technical scheme that:

a cableless case comprises an integrated case; a plurality of functional module mounting grooves are formed in the integrated case, and 6U module boxes and 3U module boxes are mounted in the functional module mounting grooves; a cableless motherboard component is arranged on one side of the integrated case close to the rear cover, and a cableless panel component is embedded in the other side of the integrated case; the cableless panel assembly transmits the received signals to the cableless motherboard assembly, and the cableless motherboard assembly is used for distributing the signals to the 6U module box and the 3U module box;

the untethered panel assembly includes a panel body; a multilayer printed board is arranged in the panel body; the upper surface of the multilayer printed board is integrated with a plurality of first connectors, a plurality of second connectors, a floating installation socket, a switch and an indicator light; the lower surface of the multilayer printed board is integrated with a power filter and a three-cavity connecting seat for signal connection with the cableless motherboard assembly;

the first connector comprises a first shell, a first floating base and a first connecting piece for connecting the first shell and the first floating base; the first shell is provided with a first mounting plate protruding outwards, a first step protruding outwards is arranged on the first shell below the first mounting plate, and the first step is provided with an external thread;

the first connecting piece comprises a first connecting part, a first positioning surface positioned below the first connecting part and a first floating part positioned below the first positioning surface; the first connecting part is provided with an internal thread; the inner thread on the first connecting part is connected with the outer thread on the first step in a threaded manner, one part of the bottom surface of the first step is in contact connection with the first positioning surface, and the other part of the bottom surface of the first step is clamped into a first floating base capable of floating up and down in a space between the other part of the bottom surface of the first step and the first floating clamping ring at the bottom of the first floating part;

a first positioning plate is arranged in the first shell, and a plurality of first upper contact pins are inserted in the positioning plate; the first upper contact pin extends downwards and is inserted into a positioning hole formed in the first floating base, and the first upper contact pin is connected with the first lower contact pin in the positioning hole.

Furthermore, a first annular bulge is formed in the top of the first floating base, and the first annular bulge can float up and down and is clamped into a space between the bottom surface of the first step and a first floating clamping ring at the bottom of the first floating portion.

Further, the second connector includes a second housing, a second floating base, and a second connecting member for connecting the second housing and the second floating base; a second mounting plate protruding outwards is arranged on the second shell, a second step protruding outwards is arranged on the second shell below the second mounting plate, and a first annular clamping groove is formed between the second step and the lower surface of the second mounting plate;

the second connecting piece comprises a second connecting part, a second positioning surface positioned below the second connecting part and a second floating part positioned at the lower part of the second positioning surface; the second connecting part comprises a second annular clamping groove and an annular tip positioned at the top of the second annular clamping groove;

the second step is clamped in the second annular clamping groove, and the annular tip at the top of the second annular clamping groove is clamped in the first annular clamping groove, so that the second shell is fixedly connected with the second connecting piece;

one part of the bottom surface of the second step is in contact connection with the second positioning surface, and a second floating base capable of floating up and down is clamped in a space between the other part of the bottom surface of the second step and a second floating clamping ring at the bottom of the second floating part;

the plug is embedded in the second shell, a plurality of first jacks are formed in the top of the plug, second upper contact pins are inserted into the first jacks, and the second upper contact pins extend downwards into the second floating base and are connected with second lower contact pins in the second floating base.

Furthermore, a second annular bulge is formed in the top of the second floating base, and the second annular bulge can float up and down and is clamped into a space between the bottom surface of the second step and a second floating clamping ring at the bottom of the second floating part.

Further, the floating mount socket includes a third housing, a third floating mount, and a third connector for connecting the third housing and the third floating mount; a third mounting plate protruding outwards is arranged on the third shell; a third step protruding inwards and a third annular clamping groove positioned below the third step are arranged in the third shell;

the top of the third floating base is provided with a first positioning groove, and the bottom of the third floating base is provided with a second positioning groove; a floating ring which protrudes outwards is arranged between the first positioning groove and the second positioning groove;

the third connecting piece is sleeved in the second positioning groove and comprises a third connecting part protruding outwards and a third positioning surface positioned above the third connecting part;

the third step is clamped in the first positioning groove; a third connecting part is fixedly embedded in the third annular clamping groove; the floating ring floats up and down in a space formed between the lower part of the third step and the third positioning surface.

Furthermore, a plurality of second jacks are formed in the third shell and communicated with a third jack in the third floating base.

Furthermore, the cableless motherboard assembly comprises a motherboard printed board and a plurality of module connectors integrated on the motherboard printed board; the module connectors are respectively connected with the 6U module box and the 3U module box; and the edge end of the motherboard printed board is provided with an input connector connected with the three-cavity connecting seat on the lower surface of the multilayer printed board.

The cableless case provided by the invention has the following beneficial effects:

the cable-free panel component is provided with the plurality of floatable connectors and the plurality of floatable mounting sockets, and when the cable-free panel component is specifically mounted, the connectors and the plurality of floatable mounting sockets have certain displacement, so that stress can be buffered during mounting, and equipment is protected; in addition, the stress on the connector and the floating installation socket can be effectively relieved when the connector and the floating installation socket are used.

The cableless panel assembly can be integrated with and transmit large-current signals, bus signals, collected signals and control signals, the signals are transmitted to the module connector on the cableless motherboard assembly, the signals are transmitted to the template printed board through the module connector and are distributed to various functional modules through the template printed board, and the cableless panel assembly comprises a 6U module box and a 3U module box so as to realize cableless transmission of the signals.

The integrated case is simple in structure and adopts a modularized layout, and the functional modules, the cableless panel assemblies and the cableless motherboard assemblies are all in cableless signal transmission, so that compared with cable connection in the traditional technology, the integrated case is more compact and simpler in internal structure, has more space for modularized layout, and is more reasonable in internal layout.

Drawings

Fig. 1 is an exploded view of a cableless chassis.

Fig. 2 is an exploded view from one perspective of the untethered panel assembly of the untethered enclosure.

Fig. 3 is an exploded view from another perspective of a cableless panel assembly of a cableless chassis.

Fig. 4 is a block diagram of a cableless motherboard assembly of a cableless chassis.

Fig. 5 is a diagram of a first connector configuration of the untethered enclosure.

Fig. 6 is a cross-sectional view of a first connector of the untethered chassis.

Fig. 7 is a diagram of a second connector configuration of the untethered enclosure.

Fig. 8 is a cross-sectional view of a second connector of the untethered chassis.

Fig. 9 is a third connector block diagram of the untethered cabinet.

Fig. 10 is a cross-sectional view of a third connector of the untethered chassis.

Wherein, 1, an indicator light; 2. an integrated chassis; 3. a functional module mounting groove; 4. 6U module box; 5. a 3U module box; 6. a cableless panel assembly; 7. a cableless motherboard assembly; 8. a rear cover; 9. a panel body; 10. a multilayer printed board; 11. a first connector; 12. a second connector; 13. a floating mount socket; 14. a switch; 15. a three-cavity connecting seat; 16. a power supply filter; 17. a motherboard printed board; 18. a module connector; 19. an input connector; 20. a first housing; 21. a first connecting member; 22. a first floating mount; 23. a first mounting plate; 24. a first step; 25. a first connection portion; 26. a first positioning surface; 27. a first floating portion; 28. a first floating snap ring; 29. a first annular projection; 30. positioning holes; 31. a first positioning plate; 32. a first upper pin; 33. a first lower pin; 34. a second housing; 35. a second connecting member; 36. a second floating mount; 37. a second mounting plate; 38. a first ring-shaped card slot; 39. a second step; 40. an annular tip; 41. a second annular card slot; 42. a second positioning surface; 43. a second floating portion; 44. a second floating snap ring; 45. a first jack; 46. a second upper pin; 47. a second lower pin; 48. a second annular projection; 49. a third housing; 50. a third floating mount; 51. a third connecting member; 52. a third mounting plate; 53. a third step; 54. a third ring slot; 55. a first positioning groove; 56. a second positioning groove; 57. a floating ring; 58. a third connecting portion; 59. a third positioning surface; 60. a second jack; 61. and a third jack.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.

According to an embodiment of the present application, referring to fig. 1 to 10, the untethered case of the present solution includes an integrated case 2, a plurality of function module mounting grooves 3 are formed in the integrated case 2, the function module mounting grooves 3 are used for accommodating different function modules, and the function modules of the present embodiment include a 6U module box 4 and a 3U module box 5 mounted in the function module mounting grooves 3.

A cableless motherboard assembly 7 is arranged on one side of the integrated case 2 close to the rear cover 8, and the cableless motherboard assembly 7 comprises a motherboard printed board 17 and a plurality of module connectors 18 integrated on the motherboard printed board 17; the module connectors 18 are respectively connected with the 6U module box 4 and the 3U module box 5; the edge end of the mother board printed board 17 is provided with an input connector 19 connected to the three-cavity junction socket 15 of the lower surface of the multilayer printed board 10.

The untethered motherboard assembly 7 receives signals transmitted by the untethered panel assembly 6 through the input connector 19 and transmits the signals to the input module connector 18, and then distributes the signals to the various functional modules, such as the 6U module case 4 and the 3U module case 5 of the present embodiment, through the motherboard 17.

The cableless panel component 6 comprises a panel body 9, wherein a multilayer printed board 10 is arranged in the panel body 9; the upper surface of multilayer printed board 10 integrates a plurality of first connectors 11, a plurality of second connectors 12, floating installation socket 13, switch 14 and pilot lamp 1, a plurality of first connectors 11, a plurality of second connectors 12, floating installation socket 13, switch 14 and pilot lamp 1 are all directly and electrically connected with multilayer printed board 10, and insert on multilayer printed board 10 through the contact pin, be connected with the integrated circuit structure in multilayer printed board 10, in order to realize that different signals enter appointed circuit structure through different connectors, realize switch 14 control, instruct the display, power filtering, integrated transmission heavy current signal, bus signal, gather the function of signal and control signal etc..

The lower surface of the multilayer printed board 10 is integrated with a power filter 16 and a three-cavity connector holder 15 for signal connection with the cableless motherboard assembly 7.

The power filter 16 is used for filtering power, and the three-cavity connecting seat 15 is used for connecting with an input connector 19 on the cableless motherboard assembly 7, so that signal transmission from the cableless panel assembly 6 to the cableless motherboard assembly 7 is realized.

The number of the first connectors 11 and the second connectors 12 on the untethered panel assembly 6 may be determined according to the specific functional module, and the embodiment is not limited herein.

A first connector 11;

the first connector 11 includes a first housing 20, a first floating base 22, and a first connector 21 for connecting the first housing 20 and the first floating base 22.

The first casing 20 is provided with a first mounting plate 23 protruding outwards, the first casing 20 below the first mounting plate 23 is provided with a first step 24 protruding outwards, and the outer circle of the first step 24 is provided with a thread used for realizing the fixed connection between the first casing 20 and the first connecting piece 21.

The first connector 21 includes a first connection portion 25, a first positioning surface 26 located below the first connection portion 25, and a first floating portion 27 located below the first positioning surface 26.

An inner thread is formed on the inner circle of the first connecting portion 25, and the first housing 20 and the first connecting member 21 are fixedly connected through the threaded connection between the inner thread on the first connecting portion 25 and the outer thread on the first step 24.

The lower surface of the first step 24 contacts the first positioning surface 26, and the lower surface of the first step 24 only partially contacts the first positioning surface 26, and a portion of the lower surface of the first step 24 contacts the first positioning surface 26, and the other portion protrudes inward.

The first floating base 22 capable of floating up and down is clamped in a space between the part of the bottom surface of the first step 24 protruding inwards and the first floating clamping ring 28 at the bottom of the first floating part 27.

The first floating snap ring 28 is used for limiting the downward floating position of the first floating base 22, and the inward protruding part of the bottom surface of the first step 24 is used for limiting the upward floating position of the first floating base 22, i.e. the position where the first floating base 22 floats is the position of the first floating portion 27.

A first positioning plate 31 is arranged in the first shell 20, and a plurality of first upper pins 32 are inserted on the positioning plate; the first upper pin 32 extends downward and is inserted into the positioning hole 30 formed in the first floating base 22, and is connected to the first lower pin 33 in the positioning hole 30.

The top of the first floating base 22 is provided with a first annular protrusion 29, and the first annular protrusion 29 can be vertically and floatingly clamped in a space between the bottom surface of the first step 24 and the first floating snap ring 28 at the bottom of the first floating portion 27, namely, the position of the first floating portion 27.

First connector 11 of this embodiment has realized floatable connector through the ingenious design of structure, when specifically using, if when installing and dismantling first connector 11, because have stronger frictional force between contact pin and the printed board, if all structures are rigid structure, then will the contact pin bend very likely, damage other structures even, so first floating base 22 of this embodiment has certain movable space to stress when buffering installation and dismantlement avoids the contact pin to damage and bends.

Meanwhile, in the present embodiment, the pins are divided into the first upper pin 32 and the first lower pin 33, and the first upper pin 32 and the first lower pin 33 are not directly connected to each other, but through the positioning hole 30 formed in the first floating base 22, the positioning hole 30 is made of a metal conductive material, the first upper pin 32 is inserted into the hole and electrically connected to the positioning hole 30, and the first lower pin 33 below the positioning hole 30 is not mechanically connected to the first upper pin 32, but is electrically connected through the metal property in the positioning hole 30.

Therefore, the pin is divided into the first upper pin 32 and the first lower pin 33 in this embodiment, and there is no mechanical connection between the two pins, but a certain gap is provided, and the gap can also buffer the stress of the connector, thereby protecting the pins.

A second connector 12;

the second connector 12 includes a second housing 34, a second floating base 36, and a second connecting member 35 for connecting the second housing 34 and the second floating base 36.

A second mounting plate 37 protruding outwards is arranged on the second housing 34, a second step 39 protruding outwards is arranged on the second housing 34 below the second mounting plate 37, and a first annular clamping groove 38 is formed between the second step 39 and the lower surface of the second mounting plate 37.

The second connector 35 includes a second connecting portion, a second positioning surface 42 located below the second connecting portion, and a second floating portion 43 located below the second positioning surface 42; the second connection portion includes a second annular notch 41 and an annular tip 40 at the top of the second annular notch 41.

In specific connection, the second step 39 is clamped into the second ring-shaped clamping groove 41, and the ring-shaped tip 40 at the top of the second ring-shaped clamping groove 41 is clamped into the first ring-shaped clamping groove 38, so as to clamp the second step 39, thereby realizing fixed connection between the second housing 34 and the second connecting member 35.

A portion of the bottom surface of the second step 39 is in contact with the second positioning surface 42, another portion of the bottom surface of the second step 39 protrudes inward, and the inward protruding portion of the bottom surface of the second step 39 serves to restrict the upper limit movement of the second floating mount 36.

The second floating base 36 floating up and down is caught in a space between the inwardly protruded portion of the bottom surface of the second step 39 and the second floating snap ring 44 at the bottom of the second floating portion 43.

The second floating snap ring 44 serves to limit the downward floating position of the second floating mount 36.

A plug is embedded in the second shell 34, a plurality of first jacks 45 are formed in the top of the plug, second upper pins 46 are inserted into downward positions in the first jacks 45, and the second upper pins 46 extend downwards into the second floating base 36 and are connected with second lower pins 47 in the second floating base 36.

The top of the second floating base 36 is provided with a second annular bulge 48, and the second annular bulge 48 can be clamped in a space between the bottom surface of the second step 39 and the second floating snap ring 44 at the bottom of the second floating part 43 in an up-and-down floating manner.

The second connector 12 of this embodiment realizes floatability of the connector through the ingenious design of structure, and when specifically using, the second floating base 36 of this embodiment has certain movable space to cushion the stress when installing and dismantling, avoid the contact pin to damage and bend, also can cushion the vibration when equipment moves.

Meanwhile, in the present embodiment, the pins are divided into the second upper pin 46 and the second lower pin 47, and the second upper pin 46 and the second lower pin 47 are not directly connected to each other, but are made of a metal conductive material through a hole formed in the second floating base 36, the second upper pin 46 is inserted into the hole and electrically connected to the hole, and the second lower pin 47 below the hole is not mechanically connected to the second upper pin 46, but is electrically connected through a metal property in the hole.

Therefore, the pin is divided into the second upper pin 46 and the second lower pin 47, and there is no mechanical connection between the two pins, but a certain gap is provided, and the gap can also buffer the stress of the connector, thereby protecting the pins.

A floating mount socket 13;

the floating mount socket 13 includes a third housing 49, a third floating mount 50, and a third connector 51 for connecting the third housing 49 and the third floating mount 50.

A third mounting plate 52 protruding outwards is arranged on the third shell 49; the third housing 49 is internally provided with a third inwardly projecting step 53 and a third annular groove 54 located below the third step 53.

The top of the third floating base 50 is provided with a first positioning groove 55, the bottom of the third floating base 50 is provided with a second positioning groove 56, and a floating ring 57 protruding outwards is arranged between the first positioning groove 55 and the second positioning groove 56.

The third connecting member 51 is sleeved in the second positioning groove 56, and the third connecting member 51 includes a third connecting portion 58 protruding outward and a third positioning surface 59 located above the third connecting portion 58.

The third step 53 is clamped in the first positioning groove 55, and the third annular clamping groove 54 is fixedly embedded in the third connecting part 58; the floating ring 57 floats up and down in the space formed between the third step 53 and the third locating surface 59.

A plurality of second insertion holes 60 are formed in the third shell 49, and the plurality of second insertion holes 60 are communicated with a third insertion hole 61 in the third floating base 50.

The cable-free panel component 6 is provided with a plurality of floatable connectors and floating installation sockets 13, and when the cable-free panel component is specifically installed, the connectors and the floating installation sockets 13 have certain displacement, so that stress can be buffered during installation, and equipment is protected; in addition, the connector and floating mount receptacle 13 are effectively relieved of stress during use.

The cableless panel component 6 can be integrated with and transmit large-current signals, bus signals, collected signals and control signals, the signals are transmitted to the module connector 18 on the cableless motherboard component 7, the signals are transmitted to the template printed board through the module connector 18 and are distributed to various functional modules through the template printed board, and the cableless panel component comprises a 6U module box 4 and a 3U module box 5, so that the cableless transmission of the signals is realized.

The integrated case 2 is simple in structure and adopts a modularized layout, and the functional modules, the cableless panel assemblies 6 and the cableless motherboard assemblies 7 are all in cableless signal transmission, so that compared with cable connection in the traditional technology, the integrated case 2 is more compact and simpler in internal structure, has more space for modularized layout, and is more reasonable in internal layout.

While the embodiments of the invention have been described in detail in connection with the accompanying drawings, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.

Claims

1. A no cable quick-witted case which characterized in that: comprises an integrated chassis; a plurality of functional module mounting grooves are formed in the integrated chassis, and 6U module boxes and 3U module boxes are mounted in the functional module mounting grooves; a cableless motherboard component is arranged on one side of the integrated case close to the rear cover, and a cableless panel component is embedded in the other side of the integrated case; the cableless panel assembly transmits the received signals to the cableless motherboard assembly, and the cableless motherboard assembly is used for distributing the signals to the 6U module box and the 3U module box;

the first connecting piece comprises a first connecting part, a first positioning surface positioned below the first connecting part and a first floating part positioned below the first positioning surface; the first connecting part is provided with an internal thread; the inner thread on the first connecting part is connected with the outer thread on the first step in a threaded manner, one part of the bottom surface of the first step is connected with the first positioning surface in a contact manner, and the other part of the bottom surface of the first step is clamped into a first floating base capable of floating up and down in a space between the other part of the bottom surface of the first step and the first floating clamping ring at the bottom of the first floating part;

2. The untethered cabinet of claim 1, wherein: a first annular bulge is formed in the top of the first floating base, and the first annular bulge can float up and down and is clamped into a space between the bottom surface of the first step and a first floating clamping ring at the bottom of the first floating portion.

3. The untethered cabinet of claim 1, wherein: the second connector comprises a second shell, a second floating base and a second connecting piece for connecting the second shell and the second floating base; a second mounting plate protruding outwards is arranged on the second shell, a second step protruding outwards is arranged on the second shell below the second mounting plate, and a first annular clamping groove is formed between the second step and the lower surface of the second mounting plate;

the second connecting piece comprises a second connecting part, a second positioning surface positioned below the second connecting part and a second floating part positioned below the second positioning surface; the second connecting part comprises a second annular clamping groove and an annular tip positioned at the top of the second annular clamping groove;

the second shell is internally embedded with a plug, the top of the plug is provided with a plurality of first jacks, second upper contact pins are inserted into the first jacks, and the second upper contact pins extend downwards into the second floating base and are connected with second lower contact pins in the second floating base.

4. The untethered cabinet of claim 3, wherein: and a second annular bulge is formed at the top of the second floating base and can be clamped into a space between the bottom surface of the second step and a second floating clamping ring at the bottom of the second floating part in an up-and-down floating manner.

5. The untethered cabinet of claim 1, wherein: the floating mounting socket comprises a third shell, a third floating base and a third connecting piece for connecting the third shell and the third floating base; a third mounting plate protruding outwards is arranged on the third shell; a third step protruding inwards and a third annular clamping groove positioned below the third step are arranged in the third shell;

the top of the third floating base is provided with a first positioning groove, and the bottom of the third floating base is provided with a second positioning groove; a floating ring protruding outwards is arranged between the first positioning groove and the second positioning groove;

6. The untethered cabinet of claim 5, wherein: a plurality of second jacks are formed in the third shell and communicated with a third jack in the third floating base.

7. The untethered cabinet of claim 1, wherein: the cableless motherboard assembly comprises a motherboard printed board and a plurality of module connectors integrated on the motherboard printed board; the module connectors are respectively connected with the 6U module box and the 3U module box; and the edge end of the motherboard printed board is provided with an input connector connected with the three-cavity connecting seat on the lower surface of the multilayer printed board.