An interlocking device for bus duct plug-in box

Abstract

The present application relates to an interlocking device for a bus duct plug-in box, comprising two movable racks slidably connected to the outer bottom wall of the plug-in box, the bus duct comprising convex edges fixed at each corner of the bus duct, the two convex edges at the top of the bus duct opposite to each other are provided with slots for the corresponding movable racks to be inserted, and the plug-in box is provided with a driving assembly for driving the two movable racks to move in opposite directions; two movable rods are slidably connected to the side wall of the plug-in box, and the ends of the two movable rods that are away from each other are fixed with bending plates, and the outer side of the bending plate is slidably connected with a liftable side plate, and a clamping plate is fixed at the bottom of the side plate, and the convex edges are clamped between the bending plate and the clamping plate; the plug-in box is provided with a moving assembly for driving the two movable rods to approach each other, and a positioning assembly for fixing the lifting height of the side plate is provided between the bending plate and the side plate. The present application has the effect of enabling the plug-in box to be applicable to bus ducts of different models and sizes, so as to improve the applicability of the plug-in box.

Description

Technical Field

[0001] The present application relates to the technical field of bus duct installation, and in particular to an interlocking device for a bus duct plug-in box. Background Art

[0002] The bus duct is a closed metal device composed of copper and aluminum busbars, which is used to distribute high power to various components of the distributed system. It has increasingly replaced wires and cables in indoor low-voltage power transmission trunk projects; a plug-in box is installed every several meters on the bus duct to facilitate the tapping of the bus duct.

[0003] The existing connection structure between the bus duct and the plug-in box includes a plurality of first connecting plates fixed to the bottom of the plug-in box and a plurality of second connecting plates fixed to the top of the bus duct. The plug-in box is placed on the bus duct, and the first connecting plates are aligned with the corresponding second connecting plates. The first connecting plates and the second connecting plates are fixed by bolts and nuts to fix the plug-in box.

[0004] With respect to the above-mentioned related technologies, the inventors believe that the following defects exist: since bus ducts come in different sizes and models, the plug-in box can only be installed on bus ducts of fixed models, resulting in low applicability of the plug-in box. Summary of the invention

[0005] In order to enable a plug-in box to be suitable for bus ducts of different models and sizes, so as to improve the applicability of the plug-in box, the present application provides an interlocking device for a bus duct plug-in box.

[0006] The interlocking device for a bus duct plug-in box provided in the present application adopts the following technical solution:

[0007] An interlocking device for a bus duct plug-in box comprises two movable racks slidably connected to the outer bottom wall of the plug-in box, the bus duct comprises convex edges fixed at each corner of the bus duct, two convex edges located at the top of the bus duct are opposite to each other and are provided with slots for the corresponding movable racks to be inserted, and the plug-in box is provided with a driving component for driving the two movable racks to move in opposite directions; two movable rods are slidably connected to a side wall of the plug-in box perpendicular to the length direction of the bus duct, and the ends of the two movable rods that are away from each other are fixed with bending plates, and the outer side of the bending plate is slidably connected to a liftable side plate, a clamping plate is fixed to the bottom of the side plate, and the convex edges are clamped between the bending plate and the clamping plate; a moving component is provided on the plug-in box for driving the two movable rods to approach each other, and a positioning component for fixing the lifting height of the side plate is provided between the bending plate and the side plate.

[0008] By adopting the above technical solution, the width of the two side panels is first adjusted, and after the plug-in box is placed on the bus duct and the two clamping plates are located under the convex ridge, the two moving rods are moved closer to each other through the moving component, and the bending plate is moved to the upper surface of the convex ridge, and then the height of the side wall is adjusted until the clamping plate and the bending plate clamp the convex ridge, and the position of the side panel is fixed by the positioning component; at this time, the moving rack is opposite to the corresponding slot, and the two moving racks are driven by the driving component to move in opposite directions and inserted into the corresponding slots. It can be suitable for bus ducts of different widths and convex ridges of different sizes, thereby improving the applicability of the plug-in box.

[0009] Optionally, the driving assembly includes a gear, a rotating rod and a locking nut. The rotating rod is rotatably connected to the bottom wall of the plug-in box and passes through it. The gear is located below the plug-in box and is coaxially fixed with the rotating rod. Two movable racks are respectively engaged on opposite sides of the gear. The rotating rod is located on the side wall of the plug-in box and is provided with a thread. The locking nut is threadedly connected to the rotating rod.

[0010] By adopting the above technical solution, the rotating rod is turned to rotate the gear, and the gear can simultaneously drive the two movable racks to move in opposite directions, thereby improving the movement efficiency of the movable racks. After the movable racks are inserted into the slots, the locking nut is turned to press it against the bottom wall of the plug-in box, thereby completing the fixing of the movable racks and improving the stability of the plug-in box after installation.

[0011] Optionally, two dovetail blocks are fixed on the movable rack, and the two dovetail blocks are respectively located near different ends of the movable rack, and a plurality of dovetail grooves for the corresponding dovetail blocks to slide inside are opened on the outer bottom wall of the plug-in box.

[0012] By adopting the above technical solution, when the gear drives the movable rack to move, the two dovetail blocks slide in the corresponding dovetail grooves, thereby improving the movement stability of the movable rack and making it more accurate when inserted into the slot.

[0013] Optionally, support rods for supporting on two ridges on the top of the bus duct are fixed on both sides of the plug-in box.

[0014] By adopting the above technical solution, after the plug-in box is placed on the bus duct, the support rod is located on the upper surface of the convex ridge, which can support the plug-in box and improve the convenience of adjusting the position of the side panel by moving the assembly.

[0015] Optionally, the movable assembly includes a guide box, a pull rope, a screw rod, and a fixing nut. The guide box is fixed on the outer wall of the plug-in box and is opened at both ends. The opposite ends of the two movable rods slide in the guide box. The screw rod passes through the middle of the guide box and is rotatably connected thereto. There are two pull ropes, and the two ends of the pull ropes are respectively fixed to the screw rod and the corresponding movable rod. The fixing nut is threadedly connected to the side wall of the screw rod outside the guide box.

[0016] By adopting the above technical solution, the screw rod can be rotated to make the pull rope pull the corresponding moving rod, and the guide box guides the moving rod, thereby improving the adjustment efficiency of the side panel position. The bending plate can also be directly pushed to make the moving rod slide into the guide box, and then the screw rod is rotated to tighten the pull rope, and then the screw rod is tightened on the guide box through the fixing nut, so that the screw rod can be fixed, and the horizontal positions of the moving rod and the side panel are also fixed, thereby improving the stability of the plug-in box after installation; after loosening the fixing nut, the screw rod is rotated in the opposite direction to release the rope, and the moving rod can be pulled outward to adjust the width between the two side panels.

[0017] Optionally, the positioning assembly includes a bevel rack, a pawl, and a rotating shaft. A receiving groove is provided on the outer wall of the bending plate, the bevel rack is fixed in the receiving groove, a groove is provided on the side wall of the side plate facing the bending plate, the rotating shaft is installed in the groove, and the pawl is rotatably connected to the rotating shaft, with one end of the pawl facing downward and clamped on the bevel rack.

[0018] By adopting the above technical solution, the cooperation of the bevel rack and the pawl enables the side panel to move upward but not downward. After the side panel is pushed upward to make the clamping plate press against the convex edge, the fixation can be automatically completed, thereby improving the convenience of operation.

[0019] Optionally, a dislocation groove parallel to the accommodating groove is opened on one side of the accommodating groove, one end of the rotating shaft extends out of the side plate, and the rotating shaft can slide along its own axial direction in the side plate.

[0020] By adopting the above technical solution, when dismantling the plug-in box, push the outer end of the shaft to make the pawl disengage from the bevel rack laterally and enter the offset groove. At this time, the side plate can be slid downward to release the clamping of the clamping plate and the bending plate on the convex edge, and then pull the shaft in the opposite direction to insert the pawl into the bevel rack again for the next installation.

[0021] Optionally, a waiting groove connected to the dislocation groove is provided at the bottom of the accommodating groove.

[0022] By adopting the above technical solution, after the pawl disengages from the bevel rack and enters the dislocation groove, the side plate slides down to drive the pawl to slide down in the dislocation groove. When the pawl slides to the waiting groove, the rotating shaft is pulled to make the pawl enter the waiting groove. At this time, the pawl can be directly pushed upward to make the pawl enter the bevel rack. There is no need to align the pawl with the gap between adjacent teeth on the bevel rack and then slide it in horizontally, which further improves the convenience of operation.

[0023] Optionally, a spring is fixed in the groove, and the end of the spring is in contact with the pawl. When the pawl is stuck in the helical rack, the spring is in a natural state or a compressed state.

[0024] By adopting the above technical solution, when the rotating shaft is pushed to disengage the pawl from the bevel rack, the spring is compressed, and after the side plate slides downward to the specified position and the rotating shaft is released, the spring can drive the pawl and the rotating shaft to automatically reset, without the need to manually pull the rotating shaft, thereby further improving the convenience of operation.

[0025] Optionally, an elastic pad is fixed to the upper surface of the splint.

[0026] By adopting the above technical solution, the elastic pad can protect the ridges and the clamping plate on the one hand, and on the other hand, since there is a certain distance between adjacent teeth on the bevel rack, the compression of the elastic pad can make the pawl more accurately inserted into the optimal position on the bevel rack, thereby improving the installation stability of the plug-in box.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. The two moving rods are moved closer to each other through the moving assembly, and then the height of the side wall is adjusted until the clamping plate and the bending plate clamp the ridges. The position of the side plate is fixed by the positioning assembly, and the two moving racks are driven by the driving assembly to move in opposite directions and insert into the corresponding slots. It can be suitable for bus ducts of different widths and ridges of different sizes, thereby improving the applicability of the plug-in box;

[0029] 2. Turn the screw rod to make the pull rope pull the corresponding moving rod, or directly push the bending plate to make the moving rod slide into the guide box, and then turn the screw rod to tighten the pull rope, and then tighten it on the guide box through the fixing nut. The horizontal position of the moving rod and the side plate is also fixed, which improves the stability of the plug-in box after installation;

[0030] 3. When the pawl slides to the waiting slot, pull the rotating shaft to make the pawl enter the waiting slot. At this time, the pawl can be directly pushed upward to enter the bevel rack. There is no need to align the pawl with the gap between adjacent teeth on the bevel rack and then slide it in horizontally, which further improves the convenience of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0032] Figure 2 It is a partial cross-sectional view to show the moving rack and slot;

[0033] Figure 3 It is a structural schematic diagram for showing the plug-in box and its installation structure;

[0034] Figure 4 It is a partial cross-sectional view showing a driving component;

[0035] Figure 5It is a partial cross-sectional view showing the dovetail block and dovetail groove;

[0036] Figure 6 It is a partial cross-sectional view to show the moving components;

[0037] Figure 7 It is a partial cross-sectional view showing the positioning component;

[0038] Figure 8 It is a partial cross-sectional view showing the offset groove and the spring;

[0039] Fig. 9 This is a partial cross-sectional view showing the elastic pad.

[0040] In the figure, 1, bus duct; 11, ridge; 12, slot; 2, plug-in box; 21, movable rack; 22, support rod; 23, dovetail block; 24, dovetail slot; 3, movable rod; 31, bending plate; 311, accommodating slot; 312, dislocation slot; 313, waiting slot; 32, side plate; 321, groove; 322, spring; 33, splint; 331, elastic pad; 4, driving assembly; 41, gear; 42, rotating rod; 43, locking nut; 5, moving assembly; 51, guide box; 52, pull rope; 53, screw; 54, fixing nut; 6, positioning assembly; 61, oblique rack; 62, pawl; 63, rotating shaft. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-9 This application is described in further detail.

[0042] The embodiment of the present application discloses an interlocking device for a bus duct plug-in box.

[0043] refer to Figure 1 and Figure 2 The bus duct 1 includes ridges 11 fixed at each corner of the bus duct, and the length direction of the ridges 11 is consistent with the length direction of the bus duct 1; in this embodiment, the bus duct 1 is set horizontally, and the plug-in box 2 is installed on the upper surface of the bus duct 1. The interlocking device for the bus duct plug-in box includes two movable racks 21 horizontally slidably connected to the outer bottom wall of the plug-in box 2, and the two movable racks 21 are close to the end of the plug-in box 2, and the inner side walls opposite to the two ridges 11 at the top of the bus duct 1 are provided with slots 12 for the corresponding movable racks 21 to be inserted, and the plug-in box 2 is provided with a driving component 4 that simultaneously drives the two movable racks 21 to move in opposite directions and fix them; the bottoms of the opposite side walls of the plug-in box 2 are horizontally fixed with support rods 22, and the support rods 22 are attached to the upper surface of the ridges 11, and the support rods 22 are located at one end of the plug-in box 2 close to the movable racks 21.

[0044] refer to Figure 1 and Figure 3The plug-in box 2 is provided with two movable rods 3 that are horizontally slidably connected to the outer wall away from the movable rack 21 and perpendicular to the length direction of the convex ridge 11. The outer ends of the two movable rods 3 are vertically fixed with bent plates 31, and the bottom ends of the bent plates 31 have a horizontal portion for being placed on the convex ridge 11; the outer walls of the bent plates 31 are vertically slidably connected with side panels 32, and the bottoms of the side panels 32 are horizontally fixed with clamps 33 for tightening the lower surface of the convex ridge 11. The plug-in box 2 is provided with a moving component 5 for fixing the two movable rods 3 and simultaneously driving the two movable rods 3 to approach each other, and a positioning component 6 for fixing the height of the side panels 32 is provided between the bent plates 31 and the side panels 32.

[0045] When installing the plug-in box 2, first adjust the width of the two side panels 32, then place the plug-in box 2 on the bus duct 1, the support rod 22 is attached to the upper surface of the ridge 11, and then the two moving rods 3 are moved closer to each other by the moving assembly 5 until the horizontal part of the bent plate 31 is attached to the upper surface of the ridge 11, the moving assembly 5 fixes the position of the moving rod 3, and then pushes the side panel 32 upward until the clamping plate 33 is pressed against the lower surface of the ridge 11, and the positioning assembly 6 fixes the position of the side panel 32, so that the bent plate 31 can be fixed. 1 and the clamping plate 33 stably clamp the ridge 11 therein; at this time, the movable rack 21 is aligned with the corresponding slot 12, and the two movable racks 21 are inserted into the slot 12 and fixed by the driving component 4, so that the stable installation of the plug-in box 2 can be completed, which can be suitable for bus ducts 1 of different widths and ridges 11 of different sizes. The whole installation structure only needs to open the slots 12 on the two ridges 11 on the bus duct 1, and there is no need to install the structure on the bus duct 1, which ultimately improves the applicability of the plug-in box 2.

[0046] refer to Figure 3 and Figure 4 The driving assembly 4 includes a rotating rod 42 that penetrates the bottom of the plug-in box 2 and is rotatably connected thereto, a gear 41 coaxially fixed to the bottom end of the rotating rod 42, and a locking nut 43 located inside the plug-in box 2. The two moving racks 21 are respectively meshed on opposite sides of the gear 41. The circumferential side wall of the rotating rod 42 located inside the plug-in box 2 is provided with threads and is threadedly connected to the locking nut 43. Rotating the rotating rod 42 can cause the gear 41 to drive the two moving racks 21 to move in opposite directions at the same time, thereby improving the convenience of inserting the moving rack 21 into the slot 12. After the moving rack 21 is inserted into the slot 12, tightening the locking nut 43 can fix the rotating rod 42, the gear 41 and the moving rack 21, thereby improving the stability of the plug-in box 2 after installation.

[0047] refer to Figure 5Two dovetail blocks 23 are fixed on each moving rack 21, and the two dovetail blocks 23 are respectively close to different ends of the moving rack 21. A plurality of dovetail grooves 24 for the corresponding dovetail blocks 23 to slide in are horizontally opened on the outer bottom wall of the plug-in box 2. When the moving rack 21 moves, the dovetail blocks 23 slide in the dovetail grooves 24, which improves the moving stability of the moving rack 21 and the accuracy of inserting into the slot 12.

[0048] refer to Figure 3 and Figure 6 The moving assembly 5 includes a guide box 51 horizontally fixed to the outer wall of the plug-in box 2 and having openings at both ends, a screw rod 53 passing through the middle of the guide box 51 and rotatably connected to the guide box 51, two pull ropes 52 fixed to the screw rod 53 and located in the guide box 51, and a fixing nut 54 threadedly connected to the screw rod 53 and located outside the guide box 51; the ends of the two moving rods 3 close to each other are inserted into the guide box 51, and the pull ropes 52 are fixed between the screw rod 53 and the corresponding moving rods 3. By turning the screw 53 to release the rope, the movable rod 3 can be pulled outward to adjust the width of the two side panels 32; after the junction box 2 is placed on the bus duct 1, the movable rod 3 can be directly pushed into the guide box 51 until the side panel 32 is in contact with the convex ridge 11, and then the screw 53 can be turned to retract the rope to fix the position of the movable rod 3, or the screw 53 can be directly turned to retract the rope so that the pull rope 52 pulls the two movable rods 3 to slide inward, and finally the fixing nut 54 can be tightened. The operation is convenient and the fixing effect is good.

[0049] refer to Figure 7 The outer wall of the bending plate 31 is vertically provided with a receiving groove 311, and the side wall of the side plate 32 facing the bending plate 31 is provided with a groove 321 connected to the receiving groove 311. The positioning assembly 6 includes a bevel rack 61 vertically fixed in the receiving groove 311, a rotating shaft 63 slidably connected in the groove 321 and one end protruding from the side plate 32, and a ratchet 62 rotatably connected to the rotating shaft 63 and one end of which is clamped on the bevel rack 61. The cooperation between the bevel rack 61 and the ratchet 62 enables the side plate 32 to only slide upward but not downward, thereby improving the convenience of the clamping operation of the convex ridge 11.

[0050] refer to Figure 7 and Figure 8The outer wall of the bending plate 31 is vertically provided with an offset groove 312 connected to one side of the accommodating groove 311, the axis of the rotating shaft 63 is parallel to the arrangement direction of the accommodating groove 311 and the offset groove 312, and the rotating shaft 63 can drive the pawl 62 to slide along its own axis direction; the bottom end of the accommodating groove 311 is provided with a waiting groove 313 connected to the offset groove 312, and the waiting groove 313 is for the pawl 62 to enter; a spring 322 is provided on the rotating shaft 63 in the groove 321, one end of the spring 322 abuts against the inner wall of the groove 321, and the other end abuts against the pawl 62; when the pawl 62 is stuck in the bevel rack 61, the spring 322 is in a natural state or a compressed state, specifically a compressed state in this embodiment, which can always give the pawl 62 a horizontal force to make the cooperation between the pawl 62 and the bevel rack 61 more reliable.

[0051] When it is necessary to release the clamping of the bending plate 31 and the clamping plate 33 on the convex ridge 11, the outer end of the rotating shaft 63 is pushed to make the spring 322 continue to be compressed. At the same time, the pawl 62 separates from the bevel rack 61 and enters the dislocation groove 312. At this time, the side plate 32 can be slid downward. When the pawl 62 slides to the waiting groove 313, the rotating shaft 63 is released, and the spring 322 drives the rotating shaft 63 to move so that the pawl 62 enters the waiting groove 313. The next time the side plate 32 is installed, the pawl 62 and the bevel rack 61 can be matched again by simply pushing the side plate 32 upward, which not only realizes the separation of the clamping plate 33 and the convex ridge 11, but also facilitates the next installation. The re-matching of the pawl 62 and the bevel rack 61 does not require the pawl 62 to align with the gap between adjacent teeth on the bevel rack 61, thereby improving the convenience of operation.

[0052] refer to Figure 7 and Fig. 9 An elastic pad 331 made of rubber is fixed to the upper surface of the clamping plate 33, which can not only protect the ridge 11 and the clamping plate 33, but also enable the pawl 62 to be more accurately inserted into the optimal position on the bevel rack 61, thereby improving the installation stability of the plug-in box 2.

[0053] The implementation principle of an interlocking device for a bus duct plug-in box in an embodiment of the present application is as follows: when installing the plug-in box 2, the screw rod 53 is rotated to release the rope to adjust the width of the two side panels 32, and then the plug-in box 2 is placed on the bus duct 1. The support rod 22 is attached to the upper surface of the convex ridge 11, and the screw rod 53 can be directly rotated to retract the rope, so that the pull rope 52 pulls the two moving rods 3 to slide inward until the horizontal part of the bending plate 31 is attached to the upper surface of the convex ridge 11, and then the fixing nut 54 is tightened to fix the position of the moving rod 3. Then push the side plate 32 upward, and the pawl 62 moves up on the bevel rack 61 until the clamping plate 33 presses the elastic pad 331 against the lower surface of the ridge 11, and the position of the side plate 32 is automatically fixed, and the bending plate 31 and the clamping plate 33 stably clamp the ridge 11 inside; at this time, the movable rack 21 is aligned with the corresponding slot 12, and the rotating rod 42 is rotated to make the gear 41 drive the two movable racks 21 to move in opposite directions at the same time. After the movable rack 21 is inserted into the slot 12, the locking nut 43 is tightened to fix it, and the stable installation of the plug-in box 2 is completed, which can be suitable for bus ducts 1 of different widths and ridges 11 of different sizes. The whole installation structure only needs to open slots 12 on the two ridges 11 on the bus duct 1, and there is no need to install the structure on the bus duct 1, which ultimately improves the applicability of the plug-in box 2.

[0054] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An interlocking device for a bus duct plug-in box, characterized in that: The invention comprises two movable racks (21) slidably connected to the outer bottom wall of the plug-in box (2); the bus duct (1) comprises a ridge (11) fixed at each corner of the bus duct (1); the two ridges (11) located at the top of the bus duct (1) are opposite to each other and are provided with slots (12) for inserting the corresponding movable racks (21); the plug-in box (2) is provided with a driving assembly (4) for driving the two movable racks (21) to move in opposite directions; two movable rods (21) are slidably connected to a side wall of the plug-in box (2) perpendicular to the length direction of the bus duct (1) 3), a bending plate (31) is fixed to one end of the two moving rods (3) that are away from each other, a liftable side plate (32) is slidably connected to the outer side of the bending plate (31), a clamping plate (33) is fixed to the bottom of the side plate (32), and the convex ridge (11) is clamped between the bending plate (31) and the clamping plate (33); a moving component (5) for driving the two moving rods (3) to approach each other is provided on the plug-in box (2), and a positioning component (6) for fixing the lifting height of the side plate (32) is provided between the bending plate (31) and the side plate (32); The moving assembly (5) comprises a guide box (51), a pull rope (52), a screw rod (53), and a fixing nut (54). The guide box (51) is fixed on the outer wall of the plug-in box (2) and is provided with openings at both ends. The opposite ends of the two moving rods (3) slide in the guide box (51). The screw rod (53) penetrates from the middle of the guide box (51) and is rotatably connected thereto. There are two pull ropes (52). The two ends of the pull rope (52) are respectively fixed to the screw rod (53) and the corresponding moving rod (3). The fixing nut (54) is threadedly connected to the side wall of the screw rod (53) located outside the guide box (51). The positioning assembly (6) comprises an oblique rack (61), a ratchet (62), and a rotating shaft (63); an accommodating groove (311) is provided on the outer wall of the bending plate (31); the oblique rack (61) is fixed in the accommodating groove (311); a groove (321) is provided on the side wall of the side plate (32) facing the bending plate (31); the rotating shaft (63) is installed in the groove (321); the ratchet (62) is rotatably connected to the rotating shaft (63); one end of the ratchet (62) faces downward and is clamped on the oblique rack (61).

2. An interlocking device for a bus duct plug-in box according to claim 1, characterized in that: The driving assembly (4) comprises a gear (41), a rotating rod (42) and a locking nut (43); the rotating rod (42) is rotatably connected to the bottom wall of the plug-in box (2) and penetrates the plug-in box; the gear (41) is located below the plug-in box (2) and is coaxially fixed with the rotating rod (42); two movable racks (21) are respectively engaged with opposite sides of the gear (41); a thread is provided on the side wall of the rotating rod (42) located inside the plug-in box (2); and the locking nut (43) is threadedly connected to the rotating rod (42).

3. An interlocking device for a bus duct plug-in box according to claim 2, characterized in that: Two dovetail blocks (23) are fixed on the movable rack (21), and the two dovetail blocks (23) are respectively located near different ends of the movable rack (21), and a plurality of dovetail grooves (24) for corresponding dovetail blocks (23) to slide inside are provided on the outer bottom wall of the plug-in box (2).

4. The interlocking device for a bus duct plug-in box according to claim 2, characterized in that: Support rods (22) for supporting on two ridges (11) at the top of the bus duct (1) are fixed on both sides of the plug-in box (2).

5. The interlocking device for a bus duct plug-in box according to claim 1, characterized in that: A dislocation groove (312) parallel to the accommodating groove (311) is provided on one side thereof, one end of the rotating shaft (63) extends out of the side plate (32), and the rotating shaft (63) can slide along its own axis direction in the side plate (32).

6. An interlocking device for a bus duct plug-in box according to claim 5, characterized in that: The bottom of the containing groove (311) is provided with a waiting groove (313) which is connected to the dislocation groove (312).

7. An interlocking device for a bus duct plug-in box according to claim 5 or 6, characterized in that: A spring (322) is fixed in the groove (321), and the end of the spring (322) contacts the pawl (62). When the pawl (62) is stuck in the bevel rack (61), the spring (322) is in a natural state or a compressed state.

8. The interlocking device for a bus duct plug-in box according to claim 1, characterized in that: An elastic pad (331) is fixed on the upper surface of the clamping plate (33).

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