A sub-component fixing structure in a controller

Abstract

The present invention provides a controller internal sub-component fixing structure, which is correspondingly installed in the controller, wherein the internal sub-component includes a circuit board assembly, a plug-in assembly and an installation component, wherein the circuit board assembly is arranged in the controller cavity through the installation component, and the plug-in assembly is arranged at the front end of the controller, and the installed plug-in assembly is electrically connected to the circuit board assembly. The controller internal sub-component fixing structure described in the present invention combines the circuit board assembly, the plug-in assembly and the installation component to form an integral structure, wherein there are fewer fixing screws between the components, and disassembly and assembly are more convenient, thereby improving the assembly processability and maintenance performance of the controller internal sub-structure, and realizing the structural connection of multiple circuit boards in a controller with complex circuits.

Description

Technical Field

[0001] The invention belongs to the technical field of controller internal sub-component manufacturing, and in particular relates to a controller internal sub-component fixing structure. Background Art

[0002] With the development of diesel engine digital technology, the control and monitoring functions are increasing, the controller structure is becoming more and more complex, and the compactness of the structure is becoming higher and higher. The controller needs to arrange more hardware circuits in a limited space. However, the number of controller circuit boards in the existing technology is large, and the number of fixing screws between the circuit board and the controller housing is large, which often has the problem of poor disassembly and maintenance; therefore, this patent application designs a sub-component fixing structure in the controller. Summary of the invention

[0003] In view of this, the present invention aims to propose a sub-component fixing structure in a controller to solve the problem that there are many fixing screws between the circuit board and the controller housing, and the disassembly and maintenance are poor.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A controller internal sub-component fixing structure is installed in the controller accordingly, the internal sub-component includes a circuit board assembly, a plug-in assembly and an installation component, the circuit board assembly is arranged in the controller cavity through the installation component, the plug-in assembly is arranged at the front end of the controller, and the installed plug-in assembly is electrically connected to the circuit board assembly accordingly.

[0006] Further, the circuit board assembly includes circuit board 1, circuit board 2, MCM circuit board and rear end board, both ends of circuit board 1, circuit board 2 and MCM circuit board are provided with plugs, and the rear end board is provided with a socket, and the plugs located at the rear ends of circuit board 1, circuit board 2 and MCM circuit board are correspondingly plugged with the sockets provided on the rear end board;

[0007] The plug-in assembly includes a front end board, which is also provided with a socket, and the socket is correspondingly plugged with the plugs located at the front end of the circuit board 1, the circuit board 2 and the MCM circuit board.

[0008] Furthermore, the controller is provided with a guide plate 1 and a guide plate 2, a gap for setting the circuit board assembly is left between the fixed guide plate 1 and the guide plate 2, and elastic clamping parts for limiting the circuit board assembly are provided on the inner walls of the guide plate 1 and the guide plate 2;

[0009] The front end of the controller is provided with an opening corresponding to the plug-in assembly, and the plug-in assembly is plugged into the opening and connected to the circuit board assembly at the rear end.

[0010] Further, the installation assembly includes a circuit board frame, a support bar and a fixing bar. The circuit board frame is a mesh frame structure. The circuit board frame is installed in the controller. The circuit board frame is provided with a plurality of bosses. The center of the boss is provided with a threaded hole. The circuit board is fixed on the boss by screws. The MCM circuit board is connected to the boss by a double-headed hexagonal copper column.

[0011] The support bar is an L-shaped structure, which is arranged on the circuit board frame. The support bar cooperates with the elastic clamping piece to form a support platform for installing the circuit board 2. The circuit board 2 is connected to the support bar through a double-headed hexagonal copper column.

[0012] The fixing bar is located at the rear end of the circuit board frame. The two ends of the fixing bar are fixedly connected to the guide plate 1 and the guide plate 2 by screws. A slot 1 for placing the rear end plate is reserved on the fixing bar. The rear end plate is vertically arranged on the fixing bar. The fixing bar is horizontally provided with two step holes. The front side of the step hole is a light hole, and the rear side is a threaded hole. A guide pin is arranged in the step hole.

[0013] A pressure strip is arranged at the top of the rear end plate, and the two ends of the pressure strip are fixed on the guide plate one and the guide plate two by screws. The bottom end of the pressure strip is provided with a slot two corresponding to the slot one, and the rear end plate is fixedly arranged between the fixing strip and the pressure strip.

[0014] Furthermore, the front ends of the circuit board frame and the support bar are provided with pin holes, the front end plate of the plug-in assembly is provided with studs, the studs are correspondingly plugged into the pin holes, the circuit board frame is provided with top screw holes in the vertical direction corresponding to the pin holes, and the top screw holes are correspondingly provided with top screws for locking the studs;

[0015] A plurality of protrusions are extended downward from the rear end of the circuit board frame, each of which is provided with a threaded hole, a guide ring is installed at the threaded hole, and a guide pin is installed in the guide ring along the step hole.

[0016] Furthermore, the stud comprises a cylindrical body arranged in the middle, two wrench holes perpendicular to each other are arranged on the cylindrical body, studs are fixed at both ends of the cylindrical body, wherein a thin cylinder is arranged at the end of one stud, and a frustum is arranged at the head of the thin cylinder;

[0017] One end of the stud is connected to the front cover of the plug-in assembly, and the other end is connected to the front end plate. The extended thin cylinder is inserted into the pin hole of the circuit board frame or support bar, and the stud is locked into the pin hole using a top screw.

[0018] Furthermore, the guide ring is a stepped cylindrical structure with a hollow interior in which a wire core is embedded. A small stepped cylinder at one end of the guide ring is provided with a thread for screwing into a threaded hole of the circuit board skeleton. The wire core includes a circular ring and a copper wire. The wire core is formed by densely winding the copper wire along the circular ring busbar. The guide ring is correspondingly plugged into the guide pin.

[0019] Further, the guide pin is screwed into the fixing strip along the side of the light hole, and the fixing strip is fixed to the bottom plate of the controller by screws;

[0020] A flange convex edge is arranged at the middle of the guide pin, a spanner flat is arranged on the flange convex edge, a round rod is fixedly arranged at one end of the flange convex edge, a ball head is arranged at the head of the round rod, and a screw rod is fixedly arranged at the other end of the flange convex edge.

[0021] Compared with the prior art, the controller internal sub-component fixing structure described in the present invention has the following beneficial effects:

[0022] (1) The controller internal sub-component fixing structure of the present invention combines the circuit board assembly, the plug-in assembly and the installation assembly to form an integral structure. The number of fixing screws between the components is small, and the disassembly and assembly is relatively convenient, thereby improving the assembly processability and maintenance performance of the controller internal sub-structure, and realizing the structural connection of multiple circuit boards in a controller with complex circuits;

[0023] (2) The controller internal sub-component fixing structure described in the present invention realizes multi-point support through the cooperation of the set guide ring and guide pin, thereby improving the vibration resistance of the controller; the wire core setting on the guide ring improves the grounding reliability of the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 A schematic diagram of a sub-component fixing structure in a controller according to an embodiment of the present invention;

[0026] Figure 2 It is a schematic diagram of the detailed structure of the circuit board assembly, the plug-in assembly and the installation component according to the embodiment of the present invention;

[0027] Figure 3 An exploded view of the circuit board assembly, the plug-in assembly and the mounting assembly according to an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the first angle structure of the guide plate 1, the guide plate 2 and the elastic clamping member according to an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the second angle structure of the guide plate 1, the guide plate 2 and the elastic clamping member according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the circuit board skeleton structure according to an embodiment of the present invention;

[0031] Figure 7This is a schematic diagram of the support bar structure according to an embodiment of the present invention;

[0032] Figure 8 This is a schematic diagram of the fixing bar structure according to an embodiment of the present invention;

[0033] Fig. 9 This is a schematic diagram of the layering structure according to an embodiment of the present invention;

[0034] Fig.10 This is a schematic diagram of the structure of a stud according to an embodiment of the present invention;

[0035] Fig.11 This is a schematic diagram of the guide ring structure according to an embodiment of the present invention;

[0036] Fig.12 This is a schematic diagram of the guide pin structure according to an embodiment of the present invention;

[0037] Fig.13 It is a schematic diagram of the structure of the elastic clamping member according to an embodiment of the present invention.

[0038] Description of reference numerals:

[0039] 1. Controller; 11. Guide plate 1; 12. Guide plate 2; 13. Elastic clamping member; 131. Base plate; 132. Folding edge; 133. Clamping plate; 134. Bending portion; 135. Clamping tongue; 136. Breaking groove; 2. Circuit board assembly; 21. Circuit board 1; 22. Circuit board 2; 23. MCM circuit board; 24. Rear end plate; 25. Plug; 26. Socket; 3. Plug assembly; 31. Front cover; 32. Flexible circuit board; 321. Front end plate; 33. Electrical connector; 4. Mounting components ; 41. Circuit board skeleton; 411. Boss; 412. Raised part; 42. Support bar; 43. Fixing bar; 431. Slot one; 432. Step hole; 44. Pressure strip; 441. Slot two; 45. Pin hole; 46. Top screw hole; 5. Double-headed stud; 51. Cylindrical body; 52. Stud; 53. Thin cylinder; 54. Cone; 55. Wrench hole; 6. Guide ring; 61. Wire core; 7. Guide pin; 71. Flange ridge; 72. Wrench flat; 73. Round rod; 74. Ball head; 75. Screw. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0043] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0044] See also Figure 1 As shown, a sub-component fixing structure of a controller 1 is installed in the controller 1, and the sub-component includes a circuit board assembly 2, a plug-in assembly 3 and an installation component 4. The circuit board assembly 2 is arranged in the cavity of the controller 1 through the installation component 4, and the plug-in assembly 3 is arranged at the front end of the controller 1, and the installed plug-in assembly 3 is electrically connected to the circuit board assembly 2.

[0045] like Figure 3 As shown, the circuit board assembly 2 includes a circuit board 1 21, a circuit board 22, an MCM circuit board 23 and a rear end board 24. Both ends of the circuit board 1 21, the circuit board 22 and the MCM circuit board 23 are provided with rectangular curved plugs 25, and the rear end board 24 is provided with a rectangular straight socket 26. The rectangular curved plugs 25 located at the rear ends of the circuit board 1 21, the circuit board 22 and the MCM circuit board 23 are correspondingly plugged with the rectangular straight sockets 26 provided on the rear end board 24 to achieve electrical connection;

[0046] like Figure 2As shown, the plug-in assembly 3 includes a front cover 31, a flexible circuit board 32 and a socket 26. The front cover 31 is provided with a plurality of through holes, and the electrical connectors 33 are correspondingly installed in the through holes. The flexible circuit board 32 is fixedly installed on the inner wall of the front cover 31 by means of stud hexagonal bolts. One end of the flexible circuit board 32 is connected to the electrical connector 33, and the other end is correspondingly plugged into the plug 25 located at the front end of the circuit board 1 21, the circuit board 22 and the MCM circuit board 23.

[0047] The flexible circuit board 32 used in this patent application is integrally formed, with both ends being hard material circuit boards, and a flexible circuit board is used in the middle for connection, and the flexible circuit board can be bent; the flexible circuit board 32 includes a flexible circuit board, a hard circuit board and a front end plate 321, and the number of flexible circuit boards and hard circuit boards is multiple, one end of the multiple flexible circuit boards is correspondingly connected to the same number of hard circuit boards, the hard circuit boards are fixedly connected to the electrical connector 33, and the other ends of the multiple flexible circuit boards are all connected to the front end plate 321, the socket 26 is set on the front end plate 321, and the front end plate 321 is electrically connected to the socket 26, and there is no other flexible connection at the interface, which improves the reliability of the electrical connection.

[0048] The front cover 31 is also provided with a plurality of countersunk holes, and handles are installed at the countersunk holes by countersunk screws. There are two handles, which are distributed on both sides of the front cover 31. The operator can insert and remove the plug-in assembly 3 from the opening of the controller 1 by manually pulling out the handles.

[0049] The rigid circuit board is also provided with a plurality of indicator lights, and the front cover plate 31 is provided with a plurality of step holes 432 for assembling the indicator light cover.

[0050] like Figure 4 and Figure 5 As shown, the controller 1 is provided with a guide plate 11 and a guide plate 2 12, and a gap for arranging the circuit board assembly 2 is left between the fixed guide plate 11 and the guide plate 2 12, and an elastic clamping member 13 for limiting the circuit board assembly 2 is provided on the inner walls of the guide plate 11 and the guide plate 2 12;

[0051] The front end of the controller 1 is provided with an opening corresponding to the plug-in assembly 3 , and the plug-in assembly 3 is plugged into the opening and connected to the circuit board assembly 2 at the rear end.

[0052] like Fig.13As shown, the elastic clamping member 13 is integrally formed by molding, and the elastic clamping member 13 includes a base plate 131, which is a strip-shaped profile, and is provided with a plurality of through holes. The base plate 131 is fixedly connected to the guide plate 11 and the guide plate 2 12 by screws, and one side of the base plate 131 is folded outward to form a folded edge 132, and a convex fillet is provided at the connection between the folded edge 132 and the base plate 131, and the folded edge 132 and the base plate 131 are in a vertical structure; by providing a convex fillet at the connection between the folded edge 132 and the base plate 131, firstly, when the circuit board is inserted, the circuit board is cleaned up; secondly, the anti-bending strengthening effect is played;

[0053] A plurality of clamping plates 133 are folded outwardly on the other side of the base plate 131 . The clamping plates 133 are arranged at equal intervals along the direction in which the base plate 131 is arranged, and a gap is left between the clamping plates 133 and the folded edge 132 .

[0054] The clamping plate 133 includes a bending portion 134 and a clamping tongue 135 fixedly connected to the end of the bending portion 134. The bending portion 134 is formed by folding upward along the substrate 131. The clamping tongue 135 relies on its inherent elastic force to press the circuit board placed in the gap. The circuit board is inserted into the gap between the folded edge 132 and the clamping tongue 135, and the circuit board is fixed by the inherent elastic force of the clamping tongue 135.

[0055] A plurality of breaking grooves 136 are provided on the folded edge 132 along the direction in which the substrate 131 is set. The breaking grooves 136 are distributed periodically. When the bending strength of the breaking grooves 136 is sufficient locally (around the through hole), they play a role of fitting adaptability. The elastic clamping piece 13 provided can be cut along the breaking grooves 136 according to the size of the circuit board.

[0056] like Figure 6 As shown, the installation assembly 4 includes a circuit board skeleton 41, a support bar 42 and a fixing bar 43. The circuit board skeleton 41 is an aluminum alloy mesh frame structure. The circuit board skeleton 41 is installed in the controller 1. The circuit board skeleton 41 is provided with a plurality of bosses 411. The center of the boss 411 is provided with a threaded hole. The circuit board 21 is fixed on the boss 411 by screws, and the MCM circuit board 23 is connected to the boss 411 by a double-headed hexagonal copper column.

[0057] like Figure 7 As shown, the support bar 42 is an L-shaped structure, with a light hole on its short side, connected to the circuit board frame 41, a pin hole 45 on the end of the long side, and a top screw hole 46 in the vertical direction for connecting and locking with the double-headed stud 525. The support bar 42 is arranged on the circuit board frame 41, and the support bar 42 cooperates with the elastic clamping member 13 to form a support platform for installing the circuit board 22. The circuit board 22 is connected to the support bar 42 through a double-headed hexagonal copper column;

[0058] like Figure 8As shown, the fixing bar 43 is located at the rear end of the circuit board skeleton 41, and the two ends of the fixing bar 43 are fixedly connected to the guide plate 11 and the guide plate 2 12 by screws. A slot 1 431 for placing the rear end plate 24 is reserved on the fixing bar 43, and the rear end plate 24 is vertically arranged on the fixing bar 43. The fixing bar 43 is horizontally provided with two step holes 432, the front side of the step hole 432 is a light hole, and the rear side is a threaded hole, and a guide pin 7 is arranged in the step hole 432;

[0059] like Fig. 9 As shown, a pressure strip 44 is provided at the top of the rear end plate 24, and the two ends of the pressure strip 44 are fixed on the guide plate 11 and the guide plate 2 12 by screws. The bottom end of the pressure strip 44 is provided with a slot 2 441 corresponding to the slot 1 431, and the rear end plate 24 is fixed between the fixing strip 43 and the pressure strip 44.

[0060] The front ends of the circuit board skeleton 41 and the support bar 42 are both provided with pin holes 45, and the front end plate 321 of the plug-in assembly 3 is provided with studs 525, and the studs 5 are correspondingly inserted into the pin holes 45. The circuit board skeleton 41 is provided with top screw holes 47 in the vertical direction corresponding to the pin holes 45, and the top screw holes 47 are correspondingly provided with top screws for locking the studs 5;

[0061] A plurality of protrusions 412 extend downward from the rear end of the circuit board skeleton 41 . Each protrusion 412 is provided with a threaded hole. A guide ring 6 is installed at the threaded hole. A guide pin 7 is installed in the guide ring 6 along the step hole 432 .

[0062] like Fig.10 As shown, the stud 5 includes a cylindrical body 51 arranged in the middle, and two spanner holes 55 perpendicular to each other are arranged on the cylindrical body 51. A conical tool is alternately inserted into the spanner holes 55 to screw the threads. Studs 52 are fixed at both ends of the cylindrical body 51, wherein a thin cylinder 53 is arranged at the end of one stud 52, and a frustum 54 is arranged at the head of the thin cylinder 53;

[0063] One end of the stud 5 is connected to the front cover plate 31 of the plug-in assembly 3, and the other end is connected to the front end plate 321. The extended thin cylinder 53 is inserted into the pin hole 45 of the circuit board skeleton 41 or the support bar 42, and the stud 5 is locked into the pin hole 45 using a top screw.

[0064] By setting a double-headed stud 5, one end of the double-headed stud 5 is connected to the front end plate 321 of the plug-in assembly 3, and the other end is connected to the circuit board skeleton 41 or the support bar 42, so that the plug-in assembly 3 is installed in coordination with the circuit board assembly 2 installed on the circuit board skeleton 41. The plug-in assembly 3 and the circuit board assembly 2 adopt an integral structural setting, which improves the assembly processability of the substructure inside the controller 1.

[0065] like Fig.11As shown, the guide ring 6 is a stepped cylindrical structure with a hollow interior in which a wire core 61 is embedded. A thread is provided on the small stepped cylinder at one end of the guide ring 6 for screwing into the threaded hole of the circuit board skeleton 41. The wire core 61 includes a circular ring and a copper wire. The wire core 61 is formed by closely winding the copper wire along the circular ring busbar. The guide ring 6 is correspondingly plugged into the guide pin 7. When the guide ring 6 is inserted into the guide pin 7, the guide pin 7 supports and electrically connects the circuit board assembly 2.

[0066] The guide pin 7 is screwed into the fixing strip 43 along the side of the light hole, and the fixing strip 43 is fixed to the bottom plate of the controller 1 by screws;

[0067] like Fig.12 As shown, a flange convex edge 71 is provided at the middle of the guide pin 7, a spanner flat 72 is provided on the flange convex edge 71, a round rod 73 is fixedly provided at one end of the flange convex edge 71, a ball head 74 is provided at the head of the round rod 73, and a screw rod 75 is fixedly provided at the other end of the flange convex edge 71;

[0068] The arrangement of the guide ring 6 and the guide pin 7 realizes multi-point support and improves the vibration resistance of the controller 1; the arrangement of the wire core 61 on the guide ring 6 improves the grounding reliability of the circuit board.

[0069] The sub-component fixing structure in the controller 1 described in the present invention combines the circuit board assembly 2, the plug-in assembly 3 and the installation component 4 to form an integral structure, thereby improving the assembly processability and maintenance performance of the sub-structure in the controller 1. The provision of the guide ring 6 and the guide pin 7 improves the grounding reliability and vibration resistance of the circuit in the controller 1.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sub-component fixing structure in a controller, correspondingly installed in a controller (1), characterized in that: The inner subcomponent comprises a circuit board assembly (2), a plug-in assembly (3) and an installation component (4); the circuit board assembly (2) is arranged in the cavity of the controller (1) through the installation component (4); the plug-in assembly (3) is arranged at the front end of the controller (1); and the installed plug-in assembly (3) is electrically connected to the circuit board assembly (2) accordingly; The controller (1) is provided with a guide plate 1 (11) and a guide plate 2 (12); a gap for arranging the circuit board assembly (2) is left between the fixed guide plate 1 (11) and the guide plate 2 (12); and elastic clamping members (13) for limiting the position of the circuit board assembly (2) are provided on the inner walls of the guide plate 1 (11) and the guide plate 2 (12); The controller (1) has an opening at the front end corresponding to the plug-in assembly (3), and the plug-in assembly (3) is plugged into the opening and connected to the circuit board assembly (2) at the rear end; The mounting assembly (4) comprises a circuit board frame (41), a support bar (42) and a fixing bar (43); the circuit board frame (41) is a mesh frame structure; the circuit board frame (41) is installed in the controller (1); a plurality of bosses (411) are provided on the circuit board frame (41); a threaded hole is provided at the center of the boss (411); the circuit board 1 (21) is fixed on the boss (411) by screws; and the MCM circuit board (23) is connected to the boss (411) by a double-headed hexagonal copper column; The support bar (42) is an L-shaped structure. The support bar (42) is arranged on the circuit board frame (41). The support bar (42) cooperates with the elastic clamping member (13) to form a support platform for installing the second circuit board (22). The second circuit board (22) is connected to the support bar (42) through a double-headed hexagonal copper column. The fixing bar (43) is located at the rear end of the circuit board frame (41), and the two ends of the fixing bar (43) are fixedly connected to the guide plate 1 (11) and the guide plate 2 (12) by screws. The fixing bar (43) is provided with a slot 1 (431) for placing the rear end plate (24). The rear end plate (24) is vertically arranged on the fixing bar (43). The fixing bar (43) is horizontally provided with two step holes (432). The front side of the step hole (432) is a light hole, and the rear side is a threaded hole. A guide pin (7) is arranged in the step hole (432); A pressure strip (44) is provided at the top end of the rear end plate (24), and two ends of the pressure strip (44) are fixedly arranged on the guide plate 1 (11) and the guide plate 2 (12) by screws. A slot 2 (441) corresponding to the slot 1 (431) is provided at the bottom end of the pressure strip (44), and the rear end plate (24) is fixedly arranged between the fixing strip (43) and the pressure strip (44).

2. A controller internal sub-component fixing structure according to claim 1, characterized in that: The circuit board assembly (2) comprises a circuit board 1 (21), a circuit board 2 (22), an MCM circuit board (23) and a rear end board (24); both ends of the circuit board 1 (21), the circuit board 2 (22) and the MCM circuit board (23) are provided with plugs (25); the rear end board (24) is provided with a socket (26); the plugs (25) located at the rear ends of the circuit board 1 (21), the circuit board 2 (22) and the MCM circuit board (23) are correspondingly plugged into the sockets (26) provided on the rear end board (24); The plug-in assembly (3) includes a front end board (321), and a socket (26) is also provided on the front end board (321). The socket (26) is correspondingly plugged into the plug (25) located at the front end of the circuit board 1 (21), the circuit board 2 (22) and the MCM circuit board (23).

3. A controller internal sub-component fixing structure according to claim 1, characterized in that: The front ends of the circuit board frame (41) and the support bar (42) are both provided with pin holes (45), the front end plate (321) of the plug-in assembly (3) is provided with studs (5), the studs (5) are correspondingly plugged into the pin holes (45), the circuit board frame (41) is provided with top screw holes (46) in the vertical direction corresponding to the pin holes (45), and the top screw holes (46) are correspondingly provided with top screws for locking the studs (5); A plurality of protrusions (412) extend downward from the rear end of the circuit board skeleton (41), each protrusion (412) is provided with a threaded hole, a guide ring (6) is installed at the threaded hole, and a guide pin (7) is installed in the guide ring (6) along the step hole (432) correspondingly.

4. A controller internal sub-component fixing structure according to claim 3, characterized in that: The stud (5) comprises a cylindrical body (51) arranged in the middle, the cylindrical body (51) is provided with two wrench holes (55) perpendicular to each other, and studs (52) are fixedly arranged at both ends of the cylindrical body (51), wherein a thin cylinder (53) is arranged at the end of one stud (52), and a frustum (54) is arranged at the head of the thin cylinder (53); One end of the stud bolt (5) is connected to the front cover plate (31) of the plug-in assembly (3), and the other end is connected to the front end plate (321). The extended thin cylinder (53) is inserted into a pin hole (45) provided on the circuit board frame (41) or the support bar (42), and the stud bolt (5) is locked into the pin hole (45) by using a top screw.

5. A controller internal sub-component fixing structure according to claim 3, characterized in that: The guide ring (6) is in the form of a stepped cylindrical structure, with a hollow interior, in which a wire core (61) is embedded. A small stepped cylindrical structure at one end of the guide ring (6) is provided with a thread for being screwed into a threaded hole of a circuit board skeleton (41). The wire core (61) comprises a circular ring and a copper wire. The wire core (61) is formed by closely winding the copper wire along a circular ring busbar. The guide ring (6) is correspondingly plugged into the guide pin (7).

6. A controller internal sub-component fixing structure according to claim 3, characterized in that: The guide pin (7) is screwed into the fixing strip (43) along the side of the light hole, and the fixing strip (43) is fixed to the bottom plate of the controller (1) by screws; A flange convex edge (71) is provided at the middle of the guide pin (7), a spanner flat (72) is provided on the flange convex edge (71), a round rod (73) is fixedly provided at one end of the flange convex edge (71), a ball head (74) is provided at the head of the round rod (73), and a screw rod (75) is fixedly provided at the other end of the flange convex edge (71).

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