Electric chassis car and middle door interlocking mechanism and method for a cubicle

Abstract

The application relates to the technical field of middle-set cabinets, and provides an electric chassis vehicle and a middle door interlocking mechanism and method for a middle-set cabinet, which solve the problems of unstable fixing of a circuit breaker and danger of an operating screw rod when a cabinet door is opened, the electric chassis vehicle for the middle-set cabinet comprises a limiting structure on the chassis vehicle, a circuit breaker is fixed by a rolling wheel, a No. I gear, a No. I rack, a pin and a limiting plate, and an L-shaped clamping block; a reverse structure drives a No. II rotating shaft by a pull rope, drives a No. I closing plate and a No. II closing plate to open a through hole; a clamping structure pushes a trapezoidal bearing plate to push a trapezoidal pushing plate, so that a sliding rod is inserted into a slope groove of a limiting rod to clamp a public plug; and a safety interlocking mechanism locks a screw rod by a T-shaped plate when a cabinet door is opened. The circuit breaker is stably moved and safely operated, the limiting plate is lifted to cooperate with the L-shaped clamping block, the trapezoidal assembly is linked, and the plug is locked.

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 is driven to move the chassis frame 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:

[0004] 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 positioned 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.

[0005] 2. In addition, the movement of the chassis trolley generally relies on the driving of the lead screw extending to the outside of the middle cabinet, and generally, the lead screw can be rotated after the cabinet door is closed. 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.

[0006] 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

[0007] The present application aims at solving the problems that the existing circuit breaker on the chassis trolley cannot be quickly and effectively fixed and positioned 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.

[0008] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0009] An electric chassis trolley for a middle cabinet comprises a middle cabinet, a No. I partition plate fixed in the middle cabinet, the No. I partition plate divides the middle cabinet into a middle cavity and a placing cavity, a plug female groove is fixed to the top inner wall of the middle cavity, and a chassis trolley is slidably connected to the top of the No. I partition plate and used for carrying a circuit breaker.

[0010] The chassis trolley is slidably connected to the top of the No. I partition plate and used for carrying a circuit breaker.

[0011] The second partition is fixed in the middle cavity and is provided with a through hole, the second partition is slidably connected with the first closing plate and the second closing plate, and the device further comprises:

[0012] The limiting structure is arranged in the chassis vehicle and comprises: a first groove, a plurality of first rotating shafts are rotatably connected in the first groove, rolling wheels and a first gear are fixedly sleeved on the outer wall of the first rotating shaft, two first racks are engaged with the first gear, a pin is fixed on the bottom of the first rack, a limiting plate is fixed on the top of the first rack, a plurality of L-shaped clamping blocks are fixed on one side of the top of the chassis vehicle, and the limiting plate is matched with the L-shaped clamping blocks to fix the circuit breaker.

[0013] The opposite structure comprises: a second rack fixed to the first closing plate, a third rack fixed to the second closing plate, a second rotating shaft rotatably connected in the middle cavity, the second rotating shaft is engaged with the second rack and the third rack through a second gear, and a pull rope is arranged around the outer wall of the second rotating shaft and is fixed to the bottom of the chassis vehicle at the other end.

[0014] As a further improvement of the above technical solution:

[0015] The limiting structure further comprises two sliding cavities, a push plate, a second tension spring and a supporting plate.

[0016] The two sliding cavities are arranged in the first partition, the push plate is slidably connected to the sliding cavities and fixed with a push rod, the push rod extends to the rotating path of the cabinet door, the second tension spring is connected between the push plate and the inner wall of the sliding cavity, the bottom of the supporting plate is fixed with a second trapezoidal block, and the second trapezoidal block is matched with the inclined surface of the first trapezoidal block on the top of the push plate.

[0017] The top of the supporting plate is provided with a guide groove, and the rolling wheels at the bottom of the pin are embedded in the guide groove.

[0018] The opposite structure further comprises a guide wheel and a limiting block.

[0019] The guide wheel is rotatably connected to the top of the first partition on both sides, the pull rope is arranged around the guide wheel, and the limiting block is fixed to one side of the second partition and used for limiting the downward position of the first closing plate.

[0020] Further comprising a clamping structure, comprising: a trapezoidal push plate sliding in the inner wall of the top of the middle cavity, a plurality of sliding rods are fixedly connected to the trapezoidal push plate, the sliding rods slide through the plug female groove, a limiting rod slidingly arranged on the top of the middle cavity is matched with the sliding rods through the inclined surface groove, a trapezoidal bearing plate is fixed to the top of the first closing plate, the total weight of the trapezoidal bearing plate and the first closing plate is greater than the weight of the second closing plate, a fourth tension spring is connected to the top end of the limiting rod, and the other end of the fourth tension spring is fixed to the top of the sliding groove.

[0021] Further comprising a safety interlocking mechanism, which comprises a lead screw, a nut block, a T-shaped plate and a third trapezoidal block.

[0022] The screw rod is rotatably connected to the moving cavity of the No. 1 partition plate, and the nut block is threadedly connected to the screw rod and fixed to the bottom of the chassis.

[0023] The two T-shaped plates are slidably connected to the No. 1 partition plate, the inner side of which is fixed with a pin block and the outer side of which extends into the sliding cavity; the No. 3 trapezoidal block is fixed to the side surface of the push plate and cooperates with the inclined surface of the T-shaped plate.

[0024] When the cabinet door is opened, the push rod is reset, the No. 3 trapezoidal block pushes the T-shaped plate to make the pin block inserted into the limiting slot of the nut block to lock the screw rod.

[0025] The bottom of the T-shaped plate is connected to the inner wall of the moving cavity through the No. 3 tension spring.

[0026] A middle door interlocking mechanism for the electric chassis vehicle comprises a lock handle and a lock catch.

[0027] The lock handle is fixed to one side of the cabinet door and provided with a clamping groove; the lock catch is slidably connected to the side wall of the middle cabinet and connected to the base through the No. 1 tension spring.

[0028] When the cabinet door is closed, the inclined surface of the lock handle pushes the lock catch upward until the No. 1 tension spring pulls the lock catch to be inserted into the clamping groove.

[0029] A use method of the middle door interlocking mechanism comprises the following steps.

[0030] S1, the circuit breaker is placed on the chassis vehicle, and the circuit breaker is pushed by the rolling wheels of the chassis vehicle until the L-shaped clamping block is blocked; the cabinet door is closed to close the middle cavity, the cabinet door pushes the push rod to move inward to stretch the No. 2 tension spring; the No. 2 tension spring drives the push plate to drive the No. 1 trapezoidal block to cooperate with the No. 2 trapezoidal block, and the push plate pushes the support plate to move upward; the support plate drives the No. 1 rack to move upward through the pin rod to brake the No. 1 gear, and drives the limiting plate to form double fixation with the L-shaped clamping block; the male plug of the circuit breaker is inserted into the female plug slot to complete the connection;

[0031] S2, the screw rod is driven to rotate by the motor or the hexagonal block, and the nut block drives the chassis vehicle to move toward the No. 2 partition plate; during the movement, the support plate continuously supports the pin rod to maintain the braking state;

[0032] S3, when the chassis vehicle moves, the pull rope is pulled, the pull rope is folded after passing through the guide wheel, and the No. 2 rotating shaft is driven to rotate; the No. 2 gear cooperates with the No. 2 rack and the No. 3 rack to drive the No. 1 closing plate to move upward and the No. 2 closing plate to move downward, and the closing of the through hole is released;

[0033] S4, the No. 1 closing plate moves upward to push the trapezoidal bearing plate, the trapezoidal bearing plate drives the trapezoidal push plate to drive the sliding rod to be inserted into the inclined surface slot to push the limiting rod to move downward, and the No. 4 tension spring is stretched; the limiting rod moving downward locks the male plug of the circuit breaker;

[0034] S5, when the cabinet door is closed, the inclined surface of the lock handle pushes the lock catch to move upward, and when the lock catch is aligned with the clamping groove, the lock catch is inserted into the clamping groove under the action of the No. 1 tension spring to prevent the push rod from resetting.

[0035] S6, when the cabinet door is opened, the push plate moves outward under the action of No. II tension spring, drives No. III trapezoidal block to push T-shaped plate to make pin block insert into limiting slot, lock nut block prevents misoperation.

[0036] Compared with the prior art, the application has the following beneficial effects:

[0037] In the application, a plurality of No. I rotating shafts are rotatably connected in the No. I groove, two No. I gears are fixedly sleeved on the outer walls of the plurality of No. I rotating shafts, two No. I racks are slidably connected in the No. I groove, the No. I racks are engaged with the No. I gears, a plurality of pin rods are fixed to the bottoms of the two No. I racks, and a limiting plate is fixed to the top of the two No. I racks; the plurality of rolling wheels can easily push the circuit breaker on the chassis car, the No. I racks are moved by the pin rods, the plurality of No. I gears are braked, the circuit breaker is prevented from sliding on the chassis car when the chassis car moves, the limiting plate is moved upward synchronously by the upward movement of the No. I racks, and the limiting plate cooperates with the L-shaped clamping block to limit and fix the circuit breaker;

[0038] In the application, a push rod extending to one side of the No. I partition plate is fixed to one side of the push plate, a plurality of No. I trapezoidal blocks are fixed to the top of the push plate, a plurality of No. II trapezoidal blocks are fixed to the bottom of the supporting plate, the bottom ends of the No. II trapezoidal blocks are matched with the No. I trapezoidal blocks, and a rolling wheel is arranged at the bottom of the pin rod; when the cabinet door rotates, the push rod is squeezed inward, the No. II tension spring drives the push plate and the No. I trapezoidal block to move, the No. I trapezoidal block cooperates with the No. II trapezoidal block to drive the supporting plate to move upward, and the supporting plate drives the No. I rack to move upward through the pin rod to brake the plurality of No. I gears;

[0039] In the application, the top ends of the two No. II racks are fixedly connected with the bottom of the No. I closed plate, two No. III racks are fixed to one side of the No. II closed plate, two No. II gears are fixedly sleeved on the outer wall of the No. II rotating shaft, the No. II gears are engaged with the corresponding No. II racks and No. III racks, two pulling ropes are arranged on the outer wall of the No. II rotating shaft, and one end of the pulling rope is fixedly connected with the bottom of the chassis car; when the chassis car moves, the pulling rope is pulled, the pulling rope is folded under the action of the two guide wheels, the No. II rotating shaft is driven to rotate by the pulling rope, the No. I closed plate and the No. II closed plate are driven to move, the closure of the through hole is released, and the plug of the circuit breaker can penetrate through the through hole and be connected with the corresponding components;

[0040] In the present application, one side of the trapezoidal push plate is fixed with a plurality of sliding rods, a plurality of limit rods are slidably connected in the sliding grooves, a plurality of inclined grooves are arranged in the plurality of limit rods, and one end of the sliding rod is matched with the inclined groove, and the top of the I-shaped sealing plate is fixed with a trapezoidal bearing plate matched with the trapezoidal push plate; the trapezoidal bearing plate pushes the trapezoidal push plate and the sliding rod to move outward, the sliding rod extends into the inclined groove and pushes the limit rod to move downward, thereby limiting the male plug of the circuit breaker, avoiding the disengagement of the male plug and the female slot in the butt joint state;

[0041] In the present application, a plurality of pin blocks are fixed on the side of the two T-shaped plates close to each other, a limit groove is arranged on the bottom of the nut block, and a III-shaped trapezoidal block is fixed on the side of the two push plates close to each other; the push plate and the push rod move outward under the action of the II-shaped tension spring, the III-shaped trapezoidal block moves synchronously, the III-shaped trapezoidal block pushes the T-shaped plate and the pin block to move to the middle, the pin block is inserted into the limit groove to limit the nut block, avoiding the movement of the nut block driven by the staff when the cabinet door matched with the middle cavity is opened, and reducing the risk brought by this operation;

[0042] In the present application, the circuit breaker on the chassis car is limited and fixed when the cabinet door seals the middle cavity, which is convenient for the stable butt joint of the circuit breaker and the corresponding components in the later period, and when the chassis car drives the circuit breaker to move, it not only removes the sealing of the through hole to facilitate the butt joint of the circuit breaker, but also can clamp the male plug of the circuit breaker, thereby ensuring the stability of the connection between the male plug and the female slot, and in addition, the chassis car can be braked when the cabinet door unseals the middle cavity, thereby reducing the risk brought by the operation of the chassis car when the middle cavity is opened. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 It is a three-dimensional structure schematic view of an electric chassis car for a middle cabinet provided in embodiment 1 of the present application;

[0044] Figure 2 It is a partial cross-sectional structure schematic view of a middle cabinet of an electric chassis car for a middle cabinet provided in embodiment 1 of the present application;

[0045] 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 car for a middle cabinet provided in embodiment 1 of the present application;

[0046] Figure 4 It is a three-dimensional structure schematic view of an I-shaped partition plate, a chassis car and a II-shaped partition plate of an electric chassis car for a middle cabinet provided in embodiment 1 of the present application;

[0047] Figure 5 It is a three-dimensional explosion structure schematic view of an I-shaped partition plate and a chassis car of an electric chassis car for a middle cabinet provided in embodiment 1 of the present application;

[0048] Figure 6 A three-dimensional exploded structural schematic view of a chassis, rolling wheels and sliding cavities of an electric chassis trolley for a cubicle provided in Embodiment 1 of the present application;

[0049] Figure 7 A three-dimensional exploded structural schematic view of rolling wheels, No. I rack and support plates of an electric chassis trolley for a cubicle provided in Embodiment 1 of the present application;

[0050] Figure 8 A partial three-dimensional sectional exploded structural schematic view of No. I partition plate, support plate and push plate of an electric chassis trolley for a cubicle provided in Embodiment 1 of the present application;

[0051] Figure 9 A three-dimensional exploded structural schematic view of No. II partition plate, No. I and No. II closing plates and No. II gear, No. II rack and No. III rack of an electric chassis trolley for a cubicle provided in Embodiment 1 of the present application;

[0052] Figure 10 A three-dimensional structural schematic view of trapezoidal load-bearing plate, trapezoidal push plate and limiting rod of an electric chassis trolley for a cubicle provided in Embodiment 1 of the present application;

[0053] Figure 11 A three-dimensional sectional structural schematic view of limiting rod of an electric chassis trolley for a cubicle provided in Embodiment 1 of the present application;

[0054] Figure 12 A three-dimensional exploded structural schematic view of No. I partition plate, support plate and T-shaped plate of an electric chassis trolley for a cubicle provided in Embodiment 2 of the present application;

[0055] Figure 13 A three-dimensional exploded structural schematic view of T-shaped plate, nut block and No. III trapezoidal block of an electric chassis trolley for a cubicle provided in Embodiment 2 of the present application.

[0056] In the figure: 1, the middle cabinet; 2, the first partition; 3, the middle cavity; 4, the placement cavity; 5, the cabinet door; 6, the lock handle; 7, the clamping groove; 8, the lock catch; 9, the first tension spring; 10, the chassis car; 11, the first recess; 12, the first rotating shaft; 13, the rolling wheel; 14, the first gear; 15, the first rack; 16, the pin rod; 17, the sliding cavity; 18, the push plate; 19, the push rod; 20, the second tension spring; 21, the first trapezoidal block; 22, the second trapezoidal block; 23, the support plate; 24, the moving cavity; 25, the screw rod; 26, the hexagonal block; 27, the L-shaped clamping block; 28, the lifting groove; 29, the limiting plate; 30, the second partition; 31, the through hole; 32, the first closing plate; 33, the second closing plate; 34, the second rotating shaft; 35, the second gear; 36, the second rack; 37, the third rack; 38, the pull rope; 39, the guide wheel; 40, the trapezoidal bearing plate; 41, the trapezoidal push plate; 42, the sliding rod; 43, the female plug groove; 44, the limiting rod; 45, the fourth tension spring; 46, the inclined groove; 47, the limiting groove; 48, the T-shaped plate; 49, the third tension spring; 50, the third trapezoidal block; 51, the nut block; 52, the limiting block; 53, the pin block. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0058] Embodiment 1: Refer to Figure 1 and Figure 2 , the electric chassis car for the middle cabinet, including the middle cabinet 1, the inside of which is fixed with the first partition 2. Through the first partition 2, the inside of the middle cabinet 1 is divided from top to bottom into the middle cavity 3 and the placement cavity 4. On one side of the middle cabinet 1, two cabinet doors 5 are arranged, which are used to close the middle cavity 3 and the placement cavity 4 respectively. On the inner wall of the top of the middle cavity 3, the female plug groove 43 is fixedly installed.

[0059] Refer to Figure 1 , Figure 2 and Figure 4 , the chassis car 10 is installed on the top of the first partition 2 through the slide rail and slide block structure, which is used to carry the circuit breaker. In the middle cavity 3, the second partition 30 is fixedly installed, and a plurality of through holes 31 are arranged on the second partition 30. Near the side of the chassis car 10, the first closing plate 32 and the second closing plate 33 are slidingly connected on the second partition 30, which are used to close the corresponding through holes 31.

[0060] Refer to Figures 5-7,In order to limit and fix the circuit breaker placed on the top of the chassis car 10, a limiting structure is arranged. A No. 1 groove 11 is opened on the top of the chassis car 10, a plurality of No. 1 rotating shafts 12 are rotatably connected in the No. 1 groove 11, a rolling wheel 13 and two No. 1 gears 14 respectively 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 slidably connected in the No. 1 groove 11 and are engaged with the No. 1 gears 14 on the same side for braking the No. 1 rotating shaft 12. The bottom of the two No. 1 racks 15 is fixed with a plurality of pin rods 16, the bottom end of the pin rod 16 slidably extends to the lower side of the chassis car 10. A plurality of L-shaped clamping blocks 27 are fixed on one side of the top of the chassis car 10 for preliminarily limiting the circuit breaker. A lifting groove 28 is opened on the other side of the top of the chassis car 10, one end of the two No. 1 racks 15 extends into the lifting groove 28, a limiting plate 29 is slidably connected in the lifting groove 28, and the limiting plate 29 is fixed on the top of the two No. 1 racks 15 and cooperates with the L-shaped clamping block 27 to complete the limiting and fixing of the circuit breaker.

[0061] With reference to Figures 5-8 Further, two sliding cavities 17 are opened in the No. 1 partition plate 2, and a push plate 18 is slidably 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 slidably 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 support plates 23 are arranged on the top of the No. 1 partition plate 2 and cooperate with the pin rods 16 on the same side. A plurality of No. 2 trapezoidal blocks 22 are fixed on the bottom of the support plate 23, and the bottom end of the No. 2 trapezoidal block 22 slidably extends into the corresponding sliding cavity 17 and cooperates with the No. 1 trapezoidal block 21. The bottom of the pin rod 16 is provided with a rolling wheel to facilitate movement on the support plate 23.

[0062] Specifically, in use, when one of the cabinet doors 5 is rotated to close the center cavity 3, the cabinet door 5 will push the push rod 19 to move inward and stretch 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 limited and fixed by the L-shaped clamping block 27 and the limiting plate 29.

[0063] With reference to Figure 4 and Figure 9In order to drive the first closing plate 32 and the second 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 arranged. The structure away from each other includes two second gear racks 36 slidingly installed on one side of the second partition plate 30, the top ends of the two second gear racks 36 are fixedly connected with the bottom of the first closing plate 32, so as to ensure the stable movement of the first closing plate 32 in the vertical direction. Meanwhile, two third gear racks 37 are fixedly installed on one side of the second closing plate 33. A second rotating shaft 34 is rotatably connected in the middle cavity 3, and two second gear wheels 35 are fixedly sleeved on the outer wall of the second rotating shaft 34, the two second gear wheels 35 are respectively engaged with the corresponding second gear rack 36 and third gear rack 37, when the second rotating shaft 34 rotates, the first closing plate 32 and the second closing plate 33 can be driven to move away from each other through the cooperation of the gear and the rack. In order to realize the driving of the second rotating shaft 34, two pull ropes 38 are arranged around the outer wall of the second rotating shaft 34, the top of the first 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 for guiding the pull rope 38. One end of the pull rope 38 away from the second rotating 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, so as to pull the second rotating shaft 34 to rotate. A plurality of limiting blocks 52 are fixedly installed on one side of the second partition plate 30, and the limiting blocks 52 are located between the first closing plate 32 and the second closing plate 33, and the limiting blocks 52 limit the first closing plate 32.

[0064] 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.

[0065] 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.

[0066] Referring to Figure 1 and Figure 3The middle door interlocking mechanism, a plurality of lock handles 6 are fixedly installed on one side of the two cabinet doors 5. The top of each lock handle 6 is provided with a clamping groove 7 for cooperating with a lock catch 8 to realize the locking function. On one side of the middle cabinet 1, a plurality of lock catches 8 are slidably connected through a base. The lock catches 8 and the corresponding clamping grooves 7 can be clamped with each other to realize the locking of the cabinet doors 5. A No. I tension spring 9 is sleeved on the outer wall of each lock catch 8. The top end of the No. I tension spring 9 is fixedly connected with the outer wall of the lock catch 8, and the bottom end of the No. I tension spring 9 is fixedly connected with the corresponding base. Thus, the lock catch 8 can keep a downward trend under the action of the tension of the No. I tension spring 9 when it is not subjected to external force. In addition, the bottom of one side of the lock catch 8 and the top of one side of the lock handle 6 are provided with inclined surfaces. The two inclined surfaces cooperate with each other to drive the lock catch 8 to move upward when the cabinet doors 5 close the middle cavity 3. When the lock catch 8 is aligned with the clamping groove 7, the lock catch 8 will be quickly inserted into the clamping groove 7 under the action of the tension of the No. I tension spring 9, thereby braking the lock handle 6, avoiding the reset of the push rod 19 under the action of the No. II tension spring 20, and ensuring the stable closure of the cabinet doors 5.

[0067] In this way, the stability of the circuit breaker on the chassis vehicle 10 can be ensured, and the closure of the through hole 31 can be easily released when needed, and the stable insertion of the male plug of the circuit breaker and the female slot 43 can be ensured.

[0068] Embodiment 2: refer to Figure 12 and Figure 13 Two T-shaped plates 48 are slidably connected in the No. I partition plate 2. The side of the two T-shaped plates 48 close to each other extends into the moving cavity 24, and a plurality of pin blocks 53 are fixed at this end. A limiting groove 47 is arranged at the bottom of the nut block 51, which cooperates with the pin block 53 to brake the nut block 51. The bottoms of the two T-shaped plates 48 are fixedly connected with No. III tension springs 49 through the base plate, and the ends of the two No. III tension springs 49 away from each other are fixedly connected with the inner walls of the corresponding moving cavities 24. Thus, the T-shaped plates 48 can keep a trend of moving to both sides under the action of the tension of the No. III tension springs 49 when they are not subjected to external force. In addition, the ends of the two T-shaped plates 48 away from each other are slidably extended into the corresponding sliding cavities 17. A No. III trapezoidal block 50 is fixed on the side of each push plate 18 close to each other, which cooperates with the T-shaped plate 48 to drive the T-shaped plate 48 to move to the middle when the push plate 18 moves.

[0069] 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 inward. When the pin block 53 is inserted into the limiting slot 47, the nut block 51 can be limited, avoiding the misoperation of the staff driving the nut block 51 to move when the cabinet door 5 cooperating with the middle cavity 3 is opened, thereby reducing the risk brought by such operation.

[0070] A method for using a middle door interlocking mechanism, comprising the following steps:

[0071] 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 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 No. II tension spring 20 pushes the push plate 18 and the No. I trapezoidal block 21 to move, 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;

[0072] S2, then drive the lead screw 25 to rotate through the motor (also can drive the lead screw 25 to rotate through the manual rotation of 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 circuit breaker as a whole to move to the No. II partition plate 30, and the support plate 23 always supports the pin rod 16 during the movement;

[0073] S3, in addition, the chassis cart 10 pulls the pull rope 38 when moving, under the action of the two guide wheels 39, the pull rope 38 can be folded in half, the No. II rotating shaft 34 is rotated by the pull rope 38, 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 and connect with the corresponding components;

[0074] S4, when the first closing plate 32 moves upward, the trapezoidal bearing plate 40 is pushed to move synchronously, the trapezoidal bearing plate 40 pushes the trapezoidal pushing plate 41 and the sliding rod 42 to move outward, the sliding rod 42 extends into the inclined groove 46 and pushes the limiting rod 44 to move downward, the fourth tension spring 45 is in a stretched state, the limiting rod 44 moving downward can limit the male plug of the circuit breaker, avoiding the male plug from being separated from the female plug slot 43 in the state of butt joint;

[0075] S5, when the cabinet door 5 closes the middle cavity 3, the inclined surface of the lock handle 6 cooperates with the inclined surface of the lock catch 8 to push the lock catch 8 to move upward, 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 first tension spring 9, the lock handle 6 is locked, avoiding the push rod 19 from being reset under the action of the second tension spring 20;

[0076] 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 second tension spring 20, the third trapezoidal block 50 moves synchronously, the T-shaped plate 48 and the pin block 53 are pushed to move to the middle by the third trapezoidal block 50, the pin block 53 is inserted into the limiting groove 47 to limit the nut block 51, avoiding the cabinet door 5 cooperating with the middle cavity 3 from moving when being opened by the staff, reducing the risk brought by this operation.

[0077] 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 skilled person 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 supporting 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) being fixed with a plurality of Ith trapezoidal blocks (21), the bottom of the supporting plate (23) being 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 supporting plate (23) is provided with a guide groove on the top thereof, and 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); the guide wheel (39) is rotatably connected to the top of the Ith partition plate (2) on both sides, and 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). ​ ​ 2. An electric chassis trolley for a switchgear cabinet according to claim 1, characterized in that ​ 3. An electric chassis trolley for a switchgear cabinet according to claim 2, characterized in that ​ ​ 4. The electric chassis trolley for a switchgear cabinet according to claim 3, 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.

5. An electric chassis trolley for a switchgear cabinet according to claim 4, 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).

6. An electric chassis trolley for a switchgear cabinet according to claim 5, 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).

7. A middle door interlock mechanism for use in an electrically powered undercarriage cart for a middle cabinet as claimed in claim 6, 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:

8. A method of using the interlock mechanism for a center door as claimed in claim 7, characterized in that, 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 inward 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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