Electric chassis vehicle and middle door interlocking mechanism and method for centrally installed switchgear

Abstract

The invention relates to the technical field of centrally installed switchgear, provides an electric chassis vehicle for a centrally installed switchgear and a middle door interlocking mechanism and method, and solves the problems that a circuit breaker is fixed unstably and a lead screw is dangerous to operate when a cabinet door is opened. A rolling wheel, a gear I and a rack I are matched with a pin rod and a limiting plate to fix the circuit breaker together with an L-shaped clamping block; the opposite structure drives a second rotating shaft through a pull rope to drive a first closing plate and a second closing plate to open through holes. A trapezoidal bearing plate in the clamping structure pushes a trapezoidal pushing plate, so that a sliding rod is inserted into an inclined plane groove of a limiting rod to clamp the male plug; and the safety interlocking mechanism locks the screw rod through the T-shaped plate when the cabinet door is opened. Stable movement and safe operation of the circuit breaker are achieved, and lifting of the limiting plate is matched with linkage of the L-shaped clamping block and the trapezoidal assembly and locking of the plug.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of the middle cabinet, and particularly relates to an electric chassis trolley for a middle cabinet and a middle door interlocking mechanism and method. BACKGROUND

[0002] In the existing switch cabinet, in order to enable the circuit breaker to conveniently realize the pushing and withdrawing functions, a chassis trolley is generally used to carry the circuit breaker, and the chassis trolley is moved forward or backward on the track in the switch cabinet through the trolley wheels installed on the chassis trolley. In order to realize the movement of the chassis trolley in the switch cabinet, a lead screw is arranged on the chassis trolley, a nut fixed to the chassis frame is sleeved on the lead screw, a handle end is connected to the end portion of the lead screw, the lead screw is rotated, the nut drives the chassis frame to move forward and backward, and thus the pushing and withdrawing of the circuit breaker chassis trolley are realized.

[0003] The chassis trolley in the prior art still has the following deficiencies in the use process: 1. In the prior art, the circuit breaker is placed on the chassis trolley through the handcart, and then the middle cabinet is moved to the inside of the middle cabinet through the chassis trolley to connect the circuit breaker. However, the circuit breaker cannot be quickly and effectively fixed and limited when the circuit breaker is placed on the chassis trolley through the handcart, and thus the connection of the circuit breaker is unstable when the chassis trolley pushes and moves the circuit breaker. 2. In addition, the movement of the chassis trolley generally relies on the lead screw extending to the outside of the middle cabinet for driving. Generally, the lead screw can be rotated after the cabinet door is closed for safe operation. However, in the prior art, the lead screw can also be driven to rotate after the cabinet door is opened, and such operation in the opened state of the cabinet door is extremely dangerous.

[0004] In view of the above problems, the present application provides an electric chassis trolley for a middle cabinet and a middle door interlocking mechanism and method. SUMMARY

[0005] The present application aims at solving the problems that the existing circuit breaker on the chassis trolley cannot be quickly and effectively fixed and limited, and the lead screw can also be driven in the opened state of the cabinet door, and provides an electric chassis trolley for a middle cabinet and a middle door interlocking mechanism and method.

[0006] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: An electric chassis trolley for a middle cabinet comprises a middle cabinet, a No. I partition plate fixed in the middle cabinet, a plug female slot fixed to the top inner wall of the middle chamber, a chassis trolley slidably connected to the top of the No. I partition plate and used for carrying a circuit breaker, a No. II partition plate fixed in the middle chamber and provided with a through hole, and a No. I closing plate and a No. II closing plate slidably connected to the No. II partition plate. The chassis trolley, the No. I partition plate, the No. II partition plate, the No. I closing plate and the No. II closing plate form a middle door interlocking mechanism. The middle door interlocking mechanism comprises a first locking mechanism and a second locking mechanism. The limiting structure is arranged in the chassis vehicle and comprises a No. I groove, a plurality of No. I rotating shafts rotatably connected in the No. I groove, a rolling wheel fixedly sleeved on the outer wall of the No. I rotating shaft and a No. I gear, two No. I racks meshing with the No. I gear, a pin rod fixed at the bottom of the No. I rack, a limiting plate fixed at the top of the No. I rack, a plurality of L-shaped clamping blocks fixed on one side of the top of the chassis vehicle, and the limiting plate and the L-shaped clamping blocks cooperating to fix the circuit breaker. The opposite structure comprises a No. II rack fixed on a No. I closed plate, a No. III rack fixed on a No. II closed plate, a No. II rotating shaft rotatably connected in a middle cavity, the No. II rotating shaft meshing the No. II rack and the No. III rack through a No. II gear, and a pull rope wound on the outer wall of the No. II rotating shaft and fixed at the bottom of the chassis vehicle at the other end.

[0007] As a further improvement of the above technical solution: The limiting structure further comprises two sliding cavities, a push plate, a No. II tension spring and a support plate. The two sliding cavities are arranged in a No. I partition plate, the push plate is slidingly connected to the sliding cavities and fixed with a push rod, the push rod extends to the rotating path of the cabinet door, the No. II tension spring connects the push plate and the inner wall of the sliding cavity, the support plate is fixed with a No. II trapezoidal block at the bottom, and the No. II trapezoidal block cooperates with the No. I trapezoidal block inclined surface at the top of the push plate.

[0008] The support plate is provided with a guide groove at the top, and the rolling wheel at the bottom of the pin rod is embedded in the guide groove.

[0009] The opposite structure further comprises a guide wheel and a limiting block. The guide wheel is rotatably connected to the top of the No. I partition plate on both sides, the pull rope is wound on the guide wheel, and the limiting block is fixed on one side of the No. II partition plate and used for limiting the downward position of the No. I closed plate.

[0010] Further comprising a clamping structure, which comprises a trapezoidal push plate sliding on the inner wall of the top of the middle cavity, a plurality of sliding rods fixedly connected to the trapezoidal push plate, the sliding rods slidingly penetrating the plug female groove, a limiting rod slidingly arranged at the top of the middle cavity and cooperating with the sliding rods through the inclined surface groove, a trapezoidal bearing plate fixed at the top of the No. I closed plate, the total weight of the trapezoidal bearing plate and the No. I closed plate being greater than the weight of the No. II closed plate, a No. IV tension spring connected to the top end of the limiting rod, and the other end of the No. IV tension spring fixed to the top of the sliding groove.

[0011] Further comprising a safety interlocking mechanism, which comprises a lead screw, a nut block, a T-shaped plate and a No. III trapezoidal block. The lead screw is rotatably connected in a moving cavity of the No. I partition plate, and the nut block is threadedly connected to the lead screw and fixed at the bottom of the chassis vehicle.

[0012] The two T-shaped plates are slidingly connected in the No. I partition plate, the inner side of the T-shaped plates is fixed with a pin block, and the outer side of the T-shaped plates extends to the sliding cavity; the No. III trapezoidal block is fixed on the side surface of the push plate and cooperates with the inclined surface of the T-shaped plate. Wherein, when the cabinet door is opened, the push rod is reset, the trapezoidal block III pushes the T-shaped plate to make the pin block insert into the limiting slot of the nut block to lock the screw rod.

[0013] The bottom of the T-shaped plate is connected to the inner wall of the moving cavity through the III number tension spring.

[0014] A middle door interlocking mechanism for the electric chassis vehicle, comprising a lock handle and a lock catch; The lock handle is fixed on one side of the cabinet door and is provided with a clamping groove; the lock catch is slidingly connected to the side wall of the middle cabinet and is connected to the base through the I number tension spring; Wherein, when the cabinet door is closed, the inclined surface of the lock handle pushes the lock catch to move upwards until the I number tension spring pulls the lock catch to insert into the clamping groove.

[0015] A use method of a middle door interlocking mechanism, comprising the following steps: S1, place the circuit breaker on the chassis vehicle, push the circuit breaker through the rolling wheels of the chassis vehicle until the L-shaped clamping block is blocked; close the middle cavity by rotating the cabinet door, push the push rod to move inward to stretch the II number tension spring; the II number tension spring drives the push plate to drive the I number trapezoidal block and the II number trapezoidal block to cooperate, and pushes the supporting plate to move upwards; the supporting plate drives the I number rack to move upwards to brake the I number gear through the pin rod, and at the same time drives the limiting plate and the L-shaped clamping block to form double fixation; insert the male plug of the circuit breaker into the plug female slot to complete the connection; S2, drive the screw rod to rotate through the motor or the hexagonal block, and the nut block drives the chassis vehicle to move towards the II number partition plate; during the movement, the supporting plate continuously supports the pin rod to maintain the braking state; S3, when the chassis vehicle moves, pull the pull rope, and after the pull rope is folded through the guide wheel, drive the II number rotating shaft to rotate; the II number gear cooperates with the II number rack and the III number rack to drive the I number closing plate to move upwards and the II number closing plate to move downwards, and the closing of the through hole is released; S4, the I number closing plate moves upwards to push the trapezoidal bearing plate, the trapezoidal bearing plate drives the trapezoidal push plate to drive the sliding rod to insert into the inclined surface slot to push the limiting rod to move downwards, and the IV number tension spring is stretched; the limiting rod moving downwards locks the male plug of the circuit breaker; S5, when the cabinet door is closed, the inclined surface of the lock handle pushes the lock catch to move upwards, and when the lock catch is aligned with the clamping groove, it is inserted into the clamping groove under the action of the I number tension spring to prevent the push rod from resetting; S6, when the cabinet door is opened, the push plate moves outward under the action of the II number tension spring, drives the III number trapezoidal block to push the T-shaped plate to make the pin block insert into the limiting slot, and locks the nut block to prevent misoperation.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows: In the application, a plurality of first rotating shafts are rotatably connected in the first groove, the outer walls of the plurality of first rotating shafts are fixedly sleeved with two first gears, two first racks are slidably connected in the first groove, the first racks are engaged with the first gears, the bottoms of the two first racks are fixed with a plurality of pin rods, and a limiting plate is fixed at the top of the two first racks; the plurality of rolling wheels can easily push the circuit breaker on the chassis car, the pin rods push the first racks to move, the plurality of first gears can be braked, the circuit breaker is prevented from sliding on the chassis car when the chassis car moves, the first racks move upwards to drive the limiting plate to move upwards, and the limiting plate cooperates with the L-shaped clamping block to limit and fix the circuit breaker; In the application, one side of the push plate is fixed with a push rod extending to one side of the first partition plate, the top of the push plate is fixed with a plurality of first trapezoidal blocks, the bottom of the supporting plate is fixed with a plurality of second trapezoidal blocks, the bottom end of the second trapezoidal block cooperates with the first trapezoidal block, and the bottom of the pin rod is provided with a rolling wheel; when the cabinet door rotates, the push rod is squeezed inward, the second tension spring drives the push plate and the first trapezoidal block to move, the first trapezoidal block cooperates with the second trapezoidal block to drive the supporting plate to move upwards, and the supporting plate drives the first rack to move upwards through the pin rod to brake the plurality of first gears; In the application, the top ends of the two second racks are fixedly connected with the bottom of the first closed plate, one side of the second closed plate is fixed with two third racks, the outer wall of the second rotating shaft is fixedly sleeved with two second gears, the second gears are engaged with the corresponding second racks and third racks, the outer wall of the second rotating shaft is provided with two pull ropes, and one end of the pull rope is fixedly connected with the bottom of the chassis car; when the chassis car moves, the pull rope is pulled, the pull rope can be folded under the action of the two guide wheels, the pull rope drives the second rotating shaft to rotate, and then drives the first closed plate and the second closed plate to move, the closure of the through hole is released, and then the plug of the circuit breaker can penetrate through the through hole and be connected with the corresponding components; In the application, one side of the trapezoidal push plate is fixed with a plurality of sliding rods, a limiting rod is slidably connected in each of the plurality of sliding grooves, an inclined groove is arranged in each of the plurality of limiting rods, one end of the sliding rod cooperates with the inclined groove, and the top of the first closed plate is fixed with a trapezoidal bearing plate cooperating with the trapezoidal push plate; the trapezoidal bearing plate drives the trapezoidal push plate and the sliding rod to move outward, the sliding rod extends into the inclined groove and drives the limiting rod to move downwards, the male plug of the circuit breaker is limited, and the male plug is prevented from being disconnected from the state of butt joint with the female socket of the plug; In the application, a plurality of pin blocks are fixed on the side of the two T-shaped plates close to each other, the bottom of the nut block is provided with a limiting groove, and the two push plates are fixed with the III trapezoidal blocks on the side close to each other; the push plate and the push rod move outward under the action of the II extension spring, the III trapezoidal blocks move synchronously, the III trapezoidal blocks push the T-shaped plate and the pin block to move to the middle, the pin block is inserted into the limiting groove to limit the nut block, so that the cabinet door matched with the middle cavity is prevented from moving when being opened by the staff, and the risk brought by such operation is reduced; In the application, the circuit breaker on the chassis vehicle is limited and fixed when the cabinet door closes the middle cavity, so that the circuit breaker is conveniently and stably connected with the corresponding components in the later period, when the chassis vehicle drives the circuit breaker to move, the through hole is not only conveniently connected with the circuit breaker, but also the circuit breaker male plug is clamped, so that the stability of the connection between the male plug and the female slot is ensured, and in addition, the chassis vehicle can be braked when the cabinet door unblocks the middle cavity, so that the risk brought by the operation of the chassis vehicle when the middle cavity is opened is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a three-dimensional structure schematic view of an electric chassis vehicle for a middle cabinet provided in embodiment 1 of the application; Figure 2 It is a partial cross-sectional structure schematic view of a middle cabinet of an electric chassis vehicle for a middle cabinet provided in embodiment 1 of the application; Figure 3 It is a three-dimensional explosion structure schematic view of a cabinet door, a lock handle and a lock catch of an electric chassis vehicle for a middle cabinet provided in embodiment 1 of the application; Figure 4 It is a three-dimensional structure schematic view of a I partition plate, a chassis vehicle and a II partition plate of an electric chassis vehicle for a middle cabinet provided in embodiment 1 of the application; Figure 5 It is a three-dimensional explosion structure schematic view of a I partition plate and a chassis vehicle of an electric chassis vehicle for a middle cabinet provided in embodiment 1 of the application; Figure 6 It is a three-dimensional explosion structure schematic view of a chassis vehicle, a rolling wheel and a sliding cavity of an electric chassis vehicle for a middle cabinet provided in embodiment 1 of the application; Figure 7 It is a three-dimensional explosion structure schematic view of a rolling wheel, a I rack and a support plate of an electric chassis vehicle for a middle cabinet provided in embodiment 1 of the application; Figure 8 It is a partial three-dimensional cross-sectional explosion structure schematic view of a I partition plate, a support plate and a push plate of an electric chassis vehicle for a middle cabinet provided in embodiment 1 of the application; Figure 9A three-dimensional explosion structure schematic view of a No. 2 partition plate, a No. 1 closing plate and a No. 2 closing plate and a No. 2 gear, a No. 2 rack and a No. 3 rack of the electric chassis vehicle for the indoor cabinet provided in Embodiment 1 of the present application; Figure 10 A three-dimensional structure schematic view of a trapezoidal bearing plate, a trapezoidal pushing plate and a limiting rod of the electric chassis vehicle for the indoor cabinet provided in Embodiment 1 of the present application; Figure 11 A three-dimensional sectional structure schematic view of the limiting rod of the electric chassis vehicle for the indoor cabinet provided in Embodiment 1 of the present application; Figure 12 A three-dimensional explosion structure schematic view of a No. 1 partition plate, a support plate and a T-shaped plate of the electric chassis vehicle for the indoor cabinet provided in Embodiment 2 of the present application; Figure 13 A three-dimensional explosion structure schematic view of a T-shaped plate, a nut block and a No. 3 trapezoidal block of the electric chassis vehicle for the indoor cabinet provided in Embodiment 2 of the present application.

[0018] In the figure: 1, an indoor cabinet; 2, a No. 1 partition plate; 3, a middle cavity; 4, a placing cavity; 5, a cabinet door; 6, a lock handle; 7, a clamping groove; 8, a lock catch; 9, a No. 1 tension spring; 10, a chassis vehicle; 11, a No. 1 recess; 12, a No. 1 rotating shaft; 13, a rolling wheel; 14, a No. 1 gear; 15, a No. 1 rack; 16, a pin rod; 17, a sliding cavity; 18, a pushing plate; 19, a pushing rod; 20, a No. 2 tension spring; 21, a No. 1 trapezoidal block; 22, a No. 2 trapezoidal block; 23, a support plate; 24, a moving cavity; 25, a screw rod; 26, a hexagonal block; 27, an L-shaped clamping block; 28, a lifting groove; 29, a limiting plate; 30, a No. 2 partition plate; 31, a through hole; 32, a No. 1 closing plate; 33, a No. 2 closing plate; 34, a No. 2 rotating shaft; 35, a No. 2 gear; 36, a No. 2 rack; 37, a No. 3 rack; 38, a pulling rope; 39, a guide wheel; 40, a trapezoidal bearing plate; 41, a trapezoidal pushing plate; 42, a sliding rod; 43, a plug female groove; 44, a limiting rod; 45, a No. 4 tension spring; 46, an inclined groove; 47, a limiting groove; 48, a T-shaped plate; 49, a No. 3 tension spring; 50, a No. 3 trapezoidal block; 51, a nut block; 52, a limiting block; 53, a pin block. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0020] Embodiment 1: Refer to Figure 1 and Figure 2The utility model provides an electric chassis vehicle for a cubical switchboard, comprising a cubical switchboard 1, the inside of which is fixed with a No. 1 partition plate 2. The inside of the cubical switchboard 1 is divided into a cubical cavity 3 and a placing cavity 4 from top to bottom through the No. 1 partition plate 2. On one side of the cubical switchboard 1, two cabinet doors 5 are arranged, which are used to close the cubical cavity 3 and the placing cavity 4 respectively. On the top inner wall of the cubical cavity 3, a plug female groove 43 is fixedly installed.

[0021] Referring to Figure 1 , Figure 2 and Figure 4 , a chassis vehicle 10 is installed on the top of the No. 1 partition plate 2 through a slide rail and a sliding block structure, which is used to carry a circuit breaker. In the cubical cavity 3, a No. 2 partition plate 30 is fixedly installed, which is provided with a plurality of through holes 31. Near the side of the chassis vehicle 10, the No. 2 partition plate 30 is slidingly connected with a No. 1 closing plate 32 and a No. 2 closing plate 33, which are used to close the corresponding through holes 31.

[0022] Referring to Figures 5-7 , in order to limit and fix the circuit breaker placed on the top of the chassis vehicle 10, a limiting structure is arranged. A No. 1 recess 11 is formed on the top of the chassis vehicle 10, a plurality of No. 1 rotating shafts 12 are rotatably connected in the No. 1 recess 11, a rolling wheel 13 and two No. 1 gears 14 located on both sides of the rolling wheel 13 are fixedly sleeved on the outer wall of each No. 1 rotating shaft 12. Two No. 1 racks 15 are slidingly connected in the No. 1 recess 11, which are engaged with the No. 1 gears 14 located on the same side, and are used to brake the No. 1 rotating shaft 12. A plurality of pin rods 16 are fixed on the bottom of the two No. 1 racks 15, the bottom end of the pin rod 16 slidingly extends to the lower side of the chassis vehicle 10. A plurality of L-shaped clamping blocks 27 are fixed on one side of the top of the chassis vehicle 10, which are used to preliminarily limit the circuit breaker. A lifting groove 28 is formed on the other side of the top of the chassis vehicle 10, one end of the two No. 1 racks 15 extends into the lifting groove 28, a limiting plate 29 is slidingly connected in the lifting groove 28, and the limiting plate 29 is fixed on the top of the two No. 1 racks 15, which cooperates with the L-shaped clamping blocks 27 to complete the limiting and fixing of the circuit breaker.

[0023] Referring to Figures 5-8 , further, two sliding cavities 17 are formed in the No. 1 partition plate 2, and a push plate 18 is slidingly connected in each sliding cavity 17. A push rod 19 is fixed on one side of the push plate 18, and one end of the push rod 19 slidingly extends to one side of the No. 1 partition plate 2. A No. 2 tension spring 20 is fixed on the inner wall of the side of the push plate 18 close to the sliding cavity 17, and the No. 2 tension spring 20 is sleeved on the outer wall of the push rod 19. A plurality of No. 1 trapezoidal blocks 21 are fixed on the top of the push plate 18. Two supporting plates 23 are arranged on the top of the No. 1 partition plate 2, which cooperates with the pin rods 16 located on the same side. A plurality of No. 2 trapezoidal blocks 22 are fixed on the bottom of the supporting plates 23, and the bottom end of the No. 2 trapezoidal blocks 22 slidingly extends into the corresponding sliding cavities 17, which cooperates with the No. 1 trapezoidal blocks 21. The bottom of the pin rod 16 is provided with a rolling wheel, so as to easily move on the supporting plate 23.

[0024] Specifically, in use, when one of the cabinet doors 5 is rotated to close the middle cavity 3, the cabinet door 5 will push the push rod 19 to move inward, stretching the No. 2 tension spring 20. Then, the No. 2 tension spring 20 pushes the push plate 18 and the No. 1 trapezoidal block 21 to move. The No. 1 trapezoidal block 21 cooperates with the No. 2 trapezoidal block 22 to push the support plate 23 to move upward. The support plate 23 pushes the No. 1 rack 15 to move upward through the pin rod 16, thereby braking the plurality of No. 1 gears 14. At this time, the circuit breaker on the chassis car 10 is jointly limited and fixed by the L-shaped clamping block 27 and the limiting plate 29.

[0025] With reference to Figure 4 and Figure 9 In order to drive the No. 1 closing plate 32 and the No. 2 closing plate 33 to move away from each other and release the closure of the through hole 31, a structure away from each other is provided. The structure away from each other includes two No. 2 racks 36 slidingly installed on one side of the No. 2 partition plate 30, the top ends of the two No. 2 racks 36 are fixedly connected with the bottom of the No. 1 closing plate 32, which ensures the stable movement of the No. 1 closing plate 32 in the vertical direction. At the same time, two No. 3 racks 37 are fixedly installed on one side of the No. 2 closing plate 33. The No. 2 shaft 34 is rotatably connected in the middle cavity 3, and two No. 2 gears 35 are fixedly sleeved on the outer wall of the No. 2 shaft 34, the two No. 2 gears 35 are respectively engaged with the corresponding No. 2 rack 36 and No. 3 rack 37, when the No. 2 shaft 34 rotates, through the cooperation of the gear and the rack, the No. 1 closing plate 32 and the No. 2 closing plate 33 can be driven to move away from each other. In order to realize the driving of the No. 2 shaft 34, two pull ropes 38 are wound on the outer wall of the No. 2 shaft 34, the top of the No. 1 partition plate 2 is rotatably connected with two guide wheels 39 through the base, and the guide wheels 39 are located below the chassis car 10, the bottoms of the two guide wheels 39 on the same side are used to guide the pull rope 38. The end of the pull rope 38 away from the No. 2 shaft 34 is fixedly connected with the bottom of the chassis car 10, when the chassis car 10 moves, the pull rope 38 will be pulled, under the action of the two guide wheels 39, the pull rope 38 can be folded in half, thereby pulling the No. 2 shaft 34 to rotate. A plurality of limiting blocks 52 are fixedly installed on one side of the No. 2 partition plate 30, and the limiting blocks 52 are located between the No. 1 closing plate 32 and the No. 2 closing plate 33, limiting the No. 1 closing plate 32.

[0026] With reference to Figure 10 and Figure 11On the inner wall of the top of the middle cavity 3, a clamping structure is arranged. The structure fixes the male plug of the circuit breaker when the male plug is inserted into the female socket 43, preventing it from being separated from the plug. The clamping structure includes a trapezoidal push plate 41 slidably mounted on the inner wall of the top of the middle cavity 3. The trapezoidal push plate 41 is fixedly installed on one side of the trapezoidal push plate 41. A plurality of sliding rods 42 are slidably connected to the female socket 43. A sliding groove is provided on the inner wall of the top of the middle cavity 3, and a limiting rod 44 is slidably connected in the sliding groove. The limiting rods 44 are used to clamp the male plug of the circuit breaker. At the same time, a No. IV extension spring 45 is fixedly installed on the top end of the limiting rod 44, and the top end of the No. IV extension spring 45 is fixedly connected with the inner wall of the top of the corresponding sliding groove. When there is no external force, the No. IV extension spring 45 will push the limiting rod 44 to move upward. A bevel groove 46 is provided in the limiting rod 44, and one end of the sliding rod 42 is matched with the bevel groove 46. When the sliding rod 42 moves, it will extend into the bevel groove 46 and push the limiting rod 44 to move downward. In order to drive the trapezoidal push plate 41 to move, a trapezoidal bearing plate 40 matched with the trapezoidal push plate 41 is fixedly installed on the top of the No. I sealing plate 32. When the No. I sealing plate 32 moves upward, it will push the trapezoidal bearing plate 40 to move synchronously, thereby pushing the trapezoidal push plate 41 and the sliding rod 42 to move outward. The sliding rod 42 will extend into the bevel groove 46 and push the limiting rod 44 to move downward. The downward moving limiting rod 44 can limit the male plug of the circuit breaker, avoiding the male plug from being separated from the female socket 43. In order to ensure that the No. I sealing plate 32 can naturally move downward and drive the No. II sealing plate 33 to move upward to complete the sealing of the through hole 31, the gravity of the trapezoidal bearing plate 40 and the No. I sealing plate 32 is greater than the gravity of the No. II sealing plate 33.

[0027] Referring to Figure 5 A moving cavity 24 is provided on the top of the No. I partition plate 2. A lead screw 25 is rotatably connected in the moving cavity 24, and a nut block 51 threadedly connected with the lead screw 25 is slidably connected in the moving cavity 24. The nut block 51 is fixed on the bottom of the chassis car 10. A hexagonal block 26 is fixedly installed on one end of the lead screw 25. When the motor drives the lead screw 25 to rotate, it can drive the nut block 51 to move in the moving cavity 24 through the thread cooperation, thereby driving the chassis car 10 to move. At the same time, in order to drive the lead screw 25 to rotate when the cabinet door 5 seals the middle cavity 3, the hexagonal block 26 is provided. The hexagonal block 26 can be driven to rotate by using a wrench or other tools, thereby driving the lead screw 25 to rotate.

[0028] Referring to Figure 1 and Figure 3The interlocking mechanism for the central doors includes multiple lock handles 6 fixedly installed on one side of each of the two cabinet doors 5. Each lock handle 6 has a slot 7 on its top for engaging with a latch 8 to achieve a locking function. On one side of the central cabinet 1, multiple latches 8 are slidably connected to a base. These latches 8 engage with their corresponding slots 7 to lock the cabinet door 5. Each latch 8 has a tension spring 9 fitted on its outer wall. The top of the tension spring 9 is fixedly connected to the outer wall of the latch 8, while its bottom is fixedly connected to the corresponding base. This allows the latch 8 to maintain a downward trend under the tension of the tension spring 9 when no external force is applied. Furthermore, both the bottom of one side of the latch 8 and the top of one side of the lock handle 6 have inclined surfaces. These two inclined surfaces work together to allow the lock handle 6 to drive the latch 8 upward when the cabinet door 5 closes the central cavity 3. When the latch 8 is aligned with the slot 7, the latch 8 will quickly insert into the slot 7 under the pulling force of the tension spring 9, thereby braking the handle 6 and preventing the push rod 19 from resetting under the action of the tension spring 20, thus ensuring the stable closure of the cabinet door 5.

[0029] In this way, the stability of the circuit breaker on the chassis vehicle 10 can be ensured, while the closure of the through hole 31 can be easily released when needed, and the secure connection between the circuit breaker male plug and the plug female slot 43 can be ensured.

[0030] Example 2: Reference Figure 12 and Figure 13 Two T-shaped plates 48 are slidably connected within partition 2. The sides of these two T-shaped plates 48 that are close to each other extend into the moving cavity 24, and multiple pins 53 are fixed to these ends. A limiting groove 47 is provided at the bottom of the nut block 51, which cooperates with the pins 53 to brake the nut block 51. The bottoms of both T-shaped plates 48 are fixedly connected to tension springs 49 (number III) via base plates, and the ends of these tension springs 49 that are far apart are fixedly connected to the inner wall of the corresponding moving cavity 24. This allows the T-shaped plates 48 to maintain a tendency to move to both sides under the tension of the tension springs 49 when no external force is applied. Furthermore, the ends of the two T-shaped plates 48 that are far apart extend slidably into the corresponding sliding cavity 17. On the side where the two push plates 18 are close to each other, trapezoidal block 50 of type III is fixed. This trapezoidal block 50 of type III cooperates with T-shaped plate 48 and can drive T-shaped plate 48 to move towards the middle when push plate 18 moves.

[0031] When the cabinet door 5 rotates to release the closure of the middle cavity 3, the push plate 18 and the push rod 19 will move outward under the action of the No. Ⅱ tension spring 20. At this time, the No. Ⅲ trapezoidal block 50 will also move synchronously, and push the T-shaped plate 48 and the pin block 53 to move to the middle. When the pin block 53 is inserted into the limiting slot 47, the nut block 51 can be limited, avoiding the cabinet door 5 cooperating with the middle cavity 3 from being misoperated by the staff to drive the nut block 51 to move when opening, thereby reducing the risk brought by such operation.

[0032] A method for using the interlocking mechanism of the middle door, comprising the following steps: S1, place the circuit breaker on the chassis cart 10, through the multiple rolling wheels 13 arranged in the chassis cart 10, the circuit breaker can be easily pushed on the chassis cart 10 until the L-shaped clamping block 27 blocks and limits the circuit breaker, then rotate one of the cabinet doors 5 to close the middle cavity 3, and when the cabinet door 5 rotates, the push rod 19 is pressed inward, the No. Ⅱ tension spring 20 is in a stretched state, the push plate 18 and the No. Ⅰ trapezoidal block 21 are pushed to move by the No. Ⅱ tension spring 20, the No. Ⅰ trapezoidal block 21 cooperates with the No. Ⅱ trapezoidal block 22 to push the support plate 23 to move upward, the support plate 23 pushes the No. Ⅰ rack 15 to move upward through the pin rod 16 to brake the multiple No. Ⅰ gears 14, avoiding the circuit breaker from sliding on the chassis cart 10 when the chassis cart 10 moves, and the No. Ⅰ rack 15 moves upward synchronously drives the limiting plate 29 to move upward, the limiting plate 29 cooperates with the L-shaped clamping block 27 to limit and fix the circuit breaker, then the male plug of the circuit breaker is connected with the female plug slot 43; S2, then drive the lead screw 25 to rotate through the motor (also can drive the lead screw 25 to rotate by manually rotating the hexagonal block 26 outside), the lead screw 25 cooperates with the nut block 51 to drive the chassis cart 10 to move, the chassis cart 10 drives the whole circuit breaker to move to the No. Ⅱ partition plate 30, and the support plate 23 always supports the pin rod 16 during the movement process; S3, in addition, the chassis cart 10 pulls the pull rope 38 when moving, the pull rope 38 is folded under the action of the two guide wheels 39, the pull rope 38 drives the No. Ⅱ rotating shaft 34 to rotate, the No. Ⅱ rotating shaft 34 drives the No. Ⅰ closing plate 32 and the No. Ⅱ closing plate 33 to move upward and downward respectively through the cooperation of the No. Ⅱ gear 35, the No. Ⅱ rack 36 and the No. Ⅲ rack 37, the closure of the through hole 31 is released, and then the plug of the circuit breaker can penetrate through the through hole 31 to connect with the corresponding components; S4, when the No. Ⅰ closing plate 32 moves upward, the trapezoidal bearing plate 40 moves synchronously, the trapezoidal bearing plate 40 drives the trapezoidal push plate 41 and the sliding rod 42 to move outward, the sliding rod 42 extends into the inclined slot 46 and drives the limiting rod 44 to move downward, the No. Ⅳ tension spring 45 is in a stretched state, and the limiting rod 44 moving downward can limit the male plug of the circuit breaker, avoiding the male plug from being disconnected with the female plug slot 43; S5, when the cabinet door 5 closes the middle cavity 3, the slope of the lock handle 6 cooperates with the slope of the lock catch 8 to push the lock catch 8 to move upwards, when the lock catch 8 is aligned with the clamping groove 7, the lock catch 8 is inserted into the clamping groove 7 under the action of the tension of the No. I tension spring 9, the lock handle 6 is locked, and the push rod 19 is reset under the action of the No. II tension spring 20; S6, when the cabinet door 5 rotates to release the closure of the middle cavity 3, the push plate 18 and the push rod 19 move outward under the action of the No. II tension spring 20, the No. III trapezoidal block 50 moves synchronously, the T-shaped plate 48 and the pin block 53 are pushed to move to the middle, the pin block 53 is inserted into the limiting groove 47 to limit the nut block 51, and the cabinet door 5 matched with the middle cavity 3 is prevented from moving when being opened by the staff driving the nut block 51 to move, and the risk brought by the operation is reduced.

[0033] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An electric chassis vehicle for a cubicle, comprising a cubicle (1), an Ith partition plate (2) fixed inside the cubicle (1), the Ith partition plate (2) separating the cubicle (1) into a middle cavity (3) and a placement cavity (4), a plug female slot (43) fixed to the top inner wall of the middle cavity (3); a chassis vehicle (10) slidingly connected to the top of the Ith partition plate (2) for carrying a circuit breaker; a IIth partition plate (30) fixed in the middle cavity (3) and provided with a through hole (31), the IIth partition plate (30) slidingly connected with an Ith closing plate (32) and a IIth closing plate (33), characterized in that further comprising: a limiting structure provided in the chassis vehicle (10), comprising: an Ith groove (11), a plurality of Ith rotating shafts (12) rotatably connected in the Ith groove (11), an Ith rotating shaft (12) fixedly sleeving a rolling wheel (13) and an Ith gear (14) on the outer wall thereof; two Ith gear racks (15) engaged with the Ith gear (14), the Ith gear rack (15) being fixed with a pin rod (16) at the bottom thereof; a limiting plate (29) fixed to the top of the Ith gear rack (15), a plurality of L-shaped clamping blocks (27) fixed to one side of the top of the chassis vehicle (10), the limiting plate (29) cooperating with the L-shaped clamping blocks (27) to fix the circuit breaker; an opposite structure, comprising: a IIth gear rack (36) fixed to the Ith closing plate (32), a IIIth gear rack (37) fixed to the IIth closing plate (33); a IIth rotating shaft (34) rotatably connected in the middle cavity (3), the IIth rotating shaft (34) engaging the IIth gear rack (36) and the IIIth gear rack (37) through a IIth gear (35); a pull rope (38) wound around the outer wall of the IIth rotating shaft (34), the other end of the pull rope (38) being fixed to the bottom of the chassis vehicle (10). The limiting structure further comprises two sliding cavities (17), a push plate (18), a IIth tension spring (20) and a support plate (23); The two sliding cavities (17) are provided in the Ith partition plate (2), the push plate (18) is slidingly connected to the sliding cavities (17) and fixed with a push rod (19), the push rod (19) extending to the rotating path of the cabinet door (5); the IIth tension spring (20) connecting the push plate (18) and the inner wall of the sliding cavity (17); the top of the push plate (18) is fixed with a plurality of Ith trapezoidal blocks (21), the bottom of the support plate (23) is fixed with a IIth trapezoidal block (22), the IIth trapezoidal block (22) cooperating with the inclined surface of the Ith trapezoidal blocks (21) on the top of the push plate (18). The support plate (23) is provided with a guide groove on the top thereof, the rolling wheel at the bottom of the pin rod (16) is embedded in the guide groove. The opposite structure further comprises a guide wheel (39) and a limiting block (52); 2. An electric chassis trolley for a switchgear cabinet according to claim 1, characterized in that The guide wheel (39) is rotatably connected to the top of both sides of the Ith partition plate (2), the pull rope (38) is wound around the guide wheel (39); the limiting block (52) is fixed to one side of the IIth partition plate (30) for limiting the downward position of the Ith closing plate (32). ​ 3. An electric chassis trolley for a switchgear cabinet according to claim 2, characterized in that ​ 4. An electric chassis trolley for a switchgear cabinet according to claim 3, characterized in that ​ ​ 5. An electric chassis trolley for a switchgear cabinet according to claim 4, characterized in that The card structure comprises a trapezoidal push plate (41) sliding on the inner wall of the top of the middle cavity (3), the trapezoidal push plate (41) is fixedly connected with a plurality of sliding rods (42), the sliding rods (42) are slidingly inserted into the plug female groove (43), a limiting rod (44) is slidingly arranged on the top of the middle cavity (3), the limiting rod (44) is internally provided with a slope groove (46), the slope groove (46) is matched with the sliding rod (42), a trapezoidal bearing plate (40) is fixedly arranged on the top of the Ith closing plate (32), the total weight of the trapezoidal bearing plate (40) and the Ith closing plate (32) is greater than the weight of the IIth closing plate (33), the inner wall of the top of the middle cavity (3) is provided with a sliding groove, the top end of the limiting rod (44) is connected with the IVth tension spring (45), and the other end of the IVth tension spring (45) is fixedly arranged on the top of the sliding groove.

6. An electric chassis trolley for a switchgear cabinet according to claim 5, characterized in that The safety interlocking mechanism comprises a lead screw (25), a nut block (51), a T-shaped plate (48) and a IIIrd trapezoidal block (50); The lead screw (25) is rotationally connected in the moving cavity (24) of the Ith partition plate (2), the nut block (51) is threadedly connected with the lead screw (25) and is fixedly arranged on the bottom of the chassis trolley (10), two T-shaped plates (48) are slidingly connected in the Ith partition plate (2), the inner side of the T-shaped plate (48) is fixedly provided with a pin block (53), and the outer side extends to the sliding cavity (17), the IIIrd trapezoidal block (50) is fixedly arranged on the side of the push plate (18) and is matched with the slope of the T-shaped plate (48); When the cabinet door (5) is opened, the push rod (19) is reset, the IIIrd trapezoidal block (50) pushes the T-shaped plate (48) to make the pin block (53) inserted into the limiting groove (47) of the nut block (51) to lock the lead screw (25).

7. An electric chassis trolley for a switchgear cabinet according to claim 6, characterized in that The bottom of the T-shaped plate (48) is connected with the inner wall of the moving cavity (24) through the IIIrd tension spring (49).

8. A middle door interlock mechanism for use in an electrically powered undercarriage cart for a middle cabinet as claimed in claim 7, characterized in that, The lock handle (6) is fixedly arranged on one side of the cabinet door (5) and is provided with a clamping groove (7), the lock catch (8) is slidingly connected with the side wall of the middle cabinet (1) and is connected with the base through the Ith tension spring (9); When the cabinet door (5) is closed, the slope of the lock handle (6) pushes the lock catch (8) to move upwards until the Ith tension spring (9) pulls the lock catch (8) to be inserted into the clamping groove (7). The method comprises the following steps:

9. A method of using the interlock mechanism for a center door as claimed in claim 8, wherein, S1, the circuit breaker is placed on the chassis trolley (10), the circuit breaker is pushed by the rolling wheels (13) of the chassis trolley (10) until the L-shaped clamping block (27) is blocked and limited, the cabinet door (5) is rotated to close the middle cavity (3), the cabinet door (5) pushes the push rod (19) to move inwards to make the IIth tension spring (20) be stretched, the IIth tension spring (20) drives the push plate (18) to drive the Ith trapezoidal block (21) and the IIth trapezoidal block (22) to cooperate and push the supporting plate (23) to move upwards, the supporting plate (23) drives the Ith rack (15) to move upwards to brake the Ith gear (14) through the pin rod (16), simultaneously drives the limiting plate (29) and the L-shaped clamping block (27) to form double fixation, the male plug of the circuit breaker is inserted into the plug female groove (43) to complete the butt joint; ​ ​ S2, drive the screw rod (25) to rotate through the motor or the hexagonal block (26), the nut block (51) drives the chassis car (10) to move to the No. Ⅱ partition plate (30); the support plate (23) continuously supports the pin rod (16) to maintain the braking state during the movement; S3, the chassis car (10) pulls the pull rope (38) when moving, the pull rope (38) is folded after passing through the guide wheel (39) and drives the No. Ⅱ rotating shaft (34) to rotate; the No. Ⅱ gear (35) cooperates with the No. Ⅱ rack (36) and the No. Ⅲ rack (37) to drive the No. Ⅰ closed plate (32) to move up and the No. Ⅱ closed plate (33) to move down, and the closure of the through hole (31) is released; S4, the No. Ⅰ closed plate (32) moves up to push the trapezoidal bearing plate (40), the trapezoidal bearing plate (40) drives the trapezoidal push plate (41) to drive the sliding rod (42) to insert the inclined groove (46) to push the limiting rod (44) to move down, and the No. Ⅳ tension spring (45) is stretched; the limiting rod (44) moving down locks the male plug of the circuit breaker; S5, when the cabinet door (5) is closed, the lock handle (6) inclined surface pushes the lock catch (8) to move up, when the lock catch (8) is aligned with the card slot (7), it is inserted into the card slot (7) under the action of the No. Ⅰ tension spring (9), and the push rod (19) is prevented from resetting; S6, when the cabinet door (5) is opened, the push plate (18) moves out under the action of the No. Ⅱ tension spring (20), drives the No. Ⅲ trapezoidal block (50) to push the T-shaped plate (48) to make the pin block (53) insert into the limiting groove (47), and the nut block (51) is locked to prevent misoperation.

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