CN211183096U - Novel fixed limiting device of draw-out type indoor alternating current metal enclosed switchgear - Google Patents

Abstract

The utility model provides a novel pull-out type indoor interchange metal enclosed switchgear's fixed stop device, it sets up in the chassis car, including left spring bolt, right spring bolt, left jam plate, right jam plate, spacing round pin axle, interlocking board and chain extension spring, a tip and the left spring bolt of left jam plate are connected, and a tip and the right spring bolt of right jam plate are connected, and left spring bolt and right spring bolt are outstanding respectively in the both sides of chassis car to it is spacing in the cubical switchboard with the chassis car. The switch of the utility model has simple structure and small volume; only air insulation is relied on, so that the reliability is strong; the loops are connected by the conventional copper bar, and the scheme has strong expansibility; the switch unit is of a drawable type, and is convenient to maintain; the current grade and high parameter are considered in the original design; no SF6, environmental protection and the like.

Description

Novel fixed limiting device of draw-out type indoor alternating current metal enclosed switchgear

Technical Field

The utility model belongs to the technical field of high tension switchgear equipment, more specifically relates to a novel pull-out type indoor interchange metal enclosed switchgear's fixed stop device.

Background

At present, switch cabinets in the market mainly comprise a KYN28-12 middle cabinet, an HXGN15-12 fixed cabinet, an SF6 inflatable cabinet, a solid insulating cabinet, a dry air and N2 inflatable cabinet and the like. The switch unit of the traditional KYN28-12 centrally installed switchgear can be drawn out, so that the maintenance is convenient, but the volume is large, the occupied area is large, and the maintenance is uneconomical; the SF6 inflatable cabinet, the solid insulation cabinet and the dry air and N2 inflatable cabinet are compact, but SF6 is greenhouse gas, the SF6 inflatable cabinet is not environment-friendly, the solid insulation cabinet uses a large amount of epoxy resin, and the risk of partial discharge is high; the HXGN15-12 fixed cabinet, the SF6 gas-filled cabinet, the solid insulation cabinet and the dry air and N2 gas-filled cabinet are all fixed, so that the installation is inconvenient to maintain and the working efficiency of production and debugging is not high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fixed stop device of indoor interchange metal enclosed switchgear of novel pull-out type suitable for take out indoor interchange metal enclosed switchgear.

According to one aspect of the utility model, a novel draw-out type fixing and limiting device of indoor AC metal-enclosed switchgear is provided, which is characterized in that the fixing and limiting device is arranged in a chassis vehicle,

fixed spacing interlocking device includes left spring bolt, right spring bolt, left jam plate, right jam plate, spacing round pin axle, interlocking plate and interlocking extension spring, a tip of left jam plate with left spring bolt is connected, a tip of right jam plate with right spring bolt is connected, left spring bolt and right spring bolt salient respectively in the both sides of chassis car, with will the chassis car is spacing in the cubical switchboard.

In some embodiments, the switch cabinet further comprises a left plastic handle and a right plastic handle which are positioned outside the cabinet body of the switch cabinet, the left plastic handle is fixedly connected with the left locking plate, the right plastic handle is fixedly connected with the right locking plate, and the circuit breaker can be drawn out of the switch cabinet and pushed in and limited by operating the left plastic handle and the right plastic handle respectively.

In some embodiments, the handle further comprises a reset spring, one end of the reset spring is fixed on the left lock plate, the other end of the reset spring is fixed on the right lock plate, the reset spring is in a stretching state when the plastic handle is operated, and the reset spring is in a reset state when the plastic handle is not operated.

In some embodiments, the switch cabinet further comprises a linkage tension spring and a linkage plate, wherein a left limit pin is arranged on the left lock plate, a right limit pin is arranged on the right lock plate, the linkage tension spring is connected with the linkage plate, and when the circuit breaker moves linearly away from the chassis vehicle, the linkage tension spring pushes the linkage plate to pop out to enable the linkage plate to be located between the left limit pin shaft and the right limit pin shaft, so that the circuit breaker cannot be pulled out of the switch cabinet.

In some embodiments of the present invention, the substrate is,

the circuit breaker mechanism assembly comprises a vacuum circuit breaker and a circuit breaker mechanism frame, the circuit breaker mechanism assembly is installed on the chassis through a ball screw assembly, and the vacuum circuit breaker is fixed on the circuit breaker mechanism frame through a solid-sealed pole and a screw nut.

The chassis vehicle comprises a chassis vehicle frame, and a left auxiliary guide assembly, a ball screw assembly and a rear auxiliary guide assembly which are arranged on the chassis vehicle frame, wherein the left auxiliary guide mechanism and the rear auxiliary guide mechanism are respectively provided with a guide groove, and the guide grooves are matched with bearings arranged on the circuit breaker mechanism assembly;

in some embodiments, the ball screw assembly comprises a ball screw, a load bearing stop collar, a screw nut, a thrust ball bearing, a linear bearing, and an upper stop collar,

the bearing limiting sleeve and the upper limiting sleeve are fixedly sleeved on the ball screw through the elastic cylindrical pin, the ball screw is located between the bearing limiting sleeve and the upper limiting sleeve and is connected in the screw nut in a threaded mode, the ball screw is further sequentially sleeved with the thrust ball bearing, the linear bearing and the lower limiting sleeve, the lower limiting sleeve is located in the chassis vehicle frame, the thrust ball bearing and the linear bearing are located between the chassis vehicle frame and the bearing limiting sleeve, and the linear bearing is installed on the chassis vehicle frame.

In some embodiments, the lead screw nut is fixedly connected with the circuit breaker mechanism assembly through a fastener, the ball screw rotates to drive the lead screw nut to linearly move on the ball screw, and the lead screw nut rotates to drive the circuit breaker mechanism assembly to linearly move up and down along the guide grooves of the left auxiliary guide mechanism and the rear auxiliary guide mechanism.

In some embodiments, the chassis vehicle further comprises an operating shaft and a transmission shaft, the transmission shaft and the operating shaft penetrate through the chassis vehicle frame, one end of the operating shaft is connected with the transmission shaft through a straight gear transmission, the other end of the operating shaft is connected with an operating handle, and the operating handle is located outside the cabinet body of the switch cabinet.

The beneficial effects are as follows: the switch of the utility model has simple structure and small volume; only air insulation is relied on, so that the reliability is strong; the loops are connected by the conventional copper bar, and the scheme has strong expansibility; the switch unit is of a drawable type, and is convenient to maintain; the current grade and high parameter are considered in the original design; no SF6, environmental protection and the like.

Drawings

Fig. 1 is a schematic front view of a switchgear cabinet of a novel draw-out indoor ac metal-enclosed switchgear according to an embodiment of the present invention;

fig. 2 is a schematic side view of a switchgear cabinet of a novel draw-out indoor ac metal-enclosed switchgear according to an embodiment of the present invention;

fig. 3 is a schematic rear view of a switchgear cabinet of a novel draw-out indoor ac metal-enclosed switchgear according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a valve mechanism of a novel draw-out indoor ac metal-enclosed switchgear according to an embodiment of the present invention;

fig. 5 is a rear view schematic structural diagram of a switchgear cabinet of a novel draw-out indoor ac metal-enclosed switchgear according to an embodiment of the present invention;

fig. 6 is a schematic front view of a vacuum circuit breaker of a novel draw-out indoor ac metal-enclosed switchgear according to an embodiment of the present invention;

fig. 7 is a schematic top view of a vacuum circuit breaker of a novel draw-out indoor ac metal enclosed switchgear according to an embodiment of the present invention;

fig. 8 is a schematic front view of a chassis truck of a novel draw-out indoor ac metal-enclosed switchgear according to an embodiment of the present invention;

fig. 9 is a schematic side view of a chassis truck of a novel draw-out indoor ac metal enclosed switchgear according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a fixing and limiting device of a novel draw-out indoor ac metal-enclosed switchgear according to an embodiment of the present invention;

fig. 11 is a schematic structural view of a fixing and limiting device of a novel draw-out indoor ac metal-enclosed switchgear according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of an interlocking mechanism of a novel draw-out indoor ac metal-enclosed switchgear according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of an interlocking mechanism of a novel draw-out indoor ac metal-enclosed switchgear according to an embodiment of the present invention.

Detailed Description

Fig. 1-13 schematically show a novel draw-out indoor ac metal enclosed switchgear according to an embodiment of the present invention. As shown in fig. 1-13, the novel draw-out type indoor ac metal-enclosed switchgear comprises a switch cabinet, a valve mechanism, a chassis vehicle, a breaker mechanism assembly, a fixed limit interlocking device and an interlocking mechanism. And a door of the switch cabinet is provided with a valve mechanism. The chassis vehicle and the circuit breaker mechanism assembly are located in the cabinet body of the switch cabinet. And a fixed limit interlocking device is arranged in the chassis vehicle. And an interlocking mechanism is arranged in the circuit breaker mechanism assembly.

As shown in fig. 1-3, the switch cabinet includes a cabinet body 11, a wall bushing 12, a combined interlocking assembly 15, a ground interlocking box 16, an insulating cover 17, a duckbill contact 18, a switch unit 19, a ground switch 110, a contact box 111, a tulip contact 112, an upper copper bar 113, a current transformer 114, a lower copper bar 115, a cable-hanging copper bar 116 and a cable 117. Wherein, the wall bushing 12, the combined interlocking component 15, the grounding interlocking box 16, the insulating cover 17, the grounding switch 110, the contact box 111 and the current transformer 114 are mounted on the cabinet 11. The duckbill contact 18 is installed in the insulation cover 17 and is connected with the current transformer 114 through the upper copper bar 113. The tulip contact 112 is installed in the contact box 111 and connected with other cabinets through a copper bar, and the lower end of the current transformer 114 is connected with the grounding switch 110 through a lower copper bar 115. The cable-hanging copper bar 116 is fixed on the lower copper bar 115, and the other end is connected with a cable 117. And the switch unit 19 is structurally characterized in that a solid-sealed pole and a lead screw nut are fixed on the circuit breaker mechanism assembly.

As shown in fig. 4-5, the shutter mechanism 2 includes a left side plate 21, a shutter assembly 22, a shutter bracket 23, a lever 24, a ground and door chain 25, a connecting plate 26, a pin 27, a shutter lever 28, a bracket 29, a guide rod 210, a return compression spring 211, a push plate 212, and a push plate bracket 213. Wherein, the valve bracket 23, the crank arm 24, the grounding and door chain 25, the connecting plate 26, the valve crank arm 28, the bracket 29 and the push plate bracket 213 are arranged on the left side plate 21. The valve assembly 22 is formed by combining a plurality of plastic door sheets, can freely turn according to the arrangement of a guide rail, and is arranged on the left side plate 21 and the contact box mounting plate 214 through a valve bracket 23. The shutter assembly 22 includes a shutter comprised of a plurality of flaps. The guide rail is composed of a straight rail and a curved rail. Two ends of the guide rail are provided with plugs. The shutter assembly 22 is disposed on the left side of the cabinet and at the lower end of the contact box 111. The crank arm 24 is arranged on the left side plate 21, the crank arm 24 is provided with a bearing and two output ends, and the bearing is arranged at the corner of the crank arm, so that the crank arm 24 can rotate around the corner. The crank arm 24 can be rotated by its bearing position when the vacuum interrupter is raised and lowered. One end of the two output ends of the crank arm 24 is connected with the grounding and door interlocking 25, so that the position interlocking of the switch cabinet door and the grounding switch in the cabinet and the vacuum circuit breaker can be realized, and the other end of the crank arm 24 is connected with the connecting plate 26. The link plate 26 is connected at one end to the lever 24 and at the other end to a shutter lever 28 by a pin 27. The pin 27 is mounted at the corner of the valve crank arm 28 to facilitate the rotation of the valve crank arm 28 around its corner. The valve crank arm 28 is mounted on the left side plate 21, and has one end connected to the connecting plate 26 and the other end connected to the push plate 212. The push plate 212 is mounted on the left side plate 21 via a push plate holder 213. The push plate 212 is designed with a guide groove to move up and down on the push plate holder 213 via the guide bar 210. Push plate 212 is connected to shutter lever arm 28 at one end and to shutter assembly 22 at the other end. The push plate 212 is designed with a guide hole, and the lower end is designed with a guide rod 210 and a reset pressure spring 211. One end of the return pressure spring 211 is connected with the guide rod 210, and the other end is connected with the bracket 29.

Detailed implementation of the shutter mechanism: the operation vacuum circuit breaker chassis car, half promote the bearing on the connecting lever 24 through vacuum circuit breaker pushup, connecting lever 24 realizes anticlockwise rotation, connecting lever 24 drives the position chain that earthing and door chain 25 downstream realized realizing that cubical switchboard door and cabinet internal grounding switch and vacuum circuit breaker, connecting lever 24 drives valve connecting lever 28 clockwise rotation through link plate 26 simultaneously, valve connecting lever 28 passes through push pedal 212 with valve subassembly 22 downstream, the switch valve is opened, vacuum circuit breaker can continue to rise this moment until with the cooperation of plum blossom contact 112 in the contact box 216, when vacuum circuit breaker descends to a certain position, bearing no longer is spacing by vacuum circuit breaker on connecting lever 24, valve subassembly 22 realizes closing the door again through pressure spring 211 that resets.

As shown in fig. 6 to 9, the chassis 37 includes a left auxiliary guide assembly 39, a ball screw 310, a load-bearing stop sleeve 311, a thrust ball bearing 312, a linear bearing 313, a chassis frame 314, an upper stop sleeve 315, a chassis and circuit breaker interlocking assembly 316, left and right lock plates 318, a tension spring 319, an operating shaft 320, a spur gear 321, a copper bush 322, a bevel gear 323, a wheel 324, a shaft pin 325, a transmission shaft 326, a lower stop sleeve 327, a positioning pin 328, a ground copper bar 329, and a rear auxiliary guide assembly 330. The left auxiliary guide assembly 39, the linear bearing 313, the chassis and circuit breaker interlocking assembly 316, the operating shaft 320, the wheel 324, the shaft pin 325, the transmission shaft 326, the positioning pin 328, the ground copper bar 329 and the rear auxiliary guide assembly 330 are mounted on the chassis frame 314. The ball screw 310 fixes the bearing limit sleeve 311 and the upper limit sleeve 315 on the bearing limit sleeve through an elastic cylindrical pin, and the middle screw part is matched with the screw nut 36 to drive the circuit breaker mechanism assembly 31 to do vertical linear motion. The ball screw 310 is provided at a lower end thereof with a thrust ball bearing 312 and a linear bearing 313. The thrust ball bearing 312 can reduce the friction resistance generated by the ball screw 310 during rotation to the maximum extent, and the linear bearing 313 is installed on the chassis frame 314, so that the directions of the ball screw 310 and the chassis frame 314 are ensured, and the breaker mechanism assembly 31 is ensured to do linear motion up and down.

The chassis truck 37 is embodied as follows: an operation hole of the chassis vehicle 37 is opened through an emergency opening button of the switch cabinet, the operation handle rotates the operation shaft 320 clockwise, the operation shaft 320 drives the transmission shaft 326 to rotate through the straight gear 321, the transmission shaft 326 rotates and drives the two groups of ball screws 310 to rotate through the bevel gear 323, the ball screws 310 drive the breaker mechanism assembly 31 to move upwards through the screw nuts 36, and when the operation handle rotates the operation shaft 320 clockwise, the breaker mechanism assembly 31 moves downwards linearly.

The chassis car and the breaker interlocking assembly 316, when its implementation mode was that the breaker need reciprocate, the operation hole of chassis car 37 need be opened, and the operation hole of opening chassis car 37 can be with the breaker separating brake, inserts operating handle and makes breaker mechanism be in the separating brake state always, and the breaker can't be closed a floodgate, realizes the safe operation of switch, and urgent separating brake function makes the cubical switchboard state of closing the door also can realize manual urgent separating brake function.

The breaker mechanism assembly 31 is mounted on the chassis 37 by the cooperation of the lead screw nut 36 and the ball screw 310. The lead screw nut 36 and the ball screw 310 are of complementary construction. The left auxiliary guide assembly 39 and the rear auxiliary guide assembly 330 are designed with guide grooves, and the guide grooves are matched with bearings arranged on the circuit breaker mechanism assembly 31 to ensure that the circuit breaker mechanism assembly 31 moves linearly up and down. The novel draw-out vacuum circuit breaker is fixed on the circuit breaker mechanism assembly 31 through the solid-sealed pole 32 and the lead screw nut 36. The embedded pole 32 is formed by pouring epoxy resin, a primary static contact 38 and an upper contact silica gel sleeve 33 are installed at the upper end of the embedded pole, and a lower contact silica gel sleeve 34 and a primary moving contact 35 are installed at the side end of the embedded pole. The upper contact silica gel sleeve 33 and the lower contact silica gel sleeve 34 are made of insulating materials, so that the electrical performance of the product is ensured, and the reliability is high. The ball screw 310 is rotated, the screw nut 36 makes linear motion on the ball screw 310, the screw nut 36 and the breaker mechanism assembly 31 are fixed by a fastener, and therefore the ball screw 310 drives the breaker mechanism assembly 31 to make up-and-down linear motion.

As shown in fig. 10 to 11, the fixing limit interlocking device 9 has a structure including a latch 421, left and right lock plates 422, a plastic handle 423, a return spring 424, a limit pin 425, an interlocking plate 426, and an interlocking tension spring 427. Plastic handles 423 are mounted to the chassis frame 314. The left and right locking plates 422 are two pieces, one end of each locking plate is fixed with a bolt 421 which respectively extends out of two sides of the chassis car to limit the chassis car in the switch cabinet. The left and right locking plates 422 are fixedly coupled to the plastic handle 423. The plastic handle 423 can be operated to pull the vacuum interrupter, the switchgear unit, out of the switchgear cabinet or to push it in and out of the switchgear cabinet. The left and right lock plates 422 are designed with a reset spring 424, one end of the reset spring 424 is fixed on the left lock plate, the other end is fixed on the right lock plate, the reset spring extends when in operation, and the reset spring resets when not in operation. The left and right lock plates 422 are interlocked with the circuit breaker, when the circuit breaker moves linearly away from the chassis, the interlocking plate 426 on the chassis is limited by the interlocking tension spring 427, so that the limiting pin shaft 425 on the left and right lock plates 422 is prevented from moving left and right, and the interlocking function that the circuit breaker cannot be drawn out of the switch cabinet is realized.

As shown in fig. 12-13, the novel interlocking mechanism for the vacuum circuit breaker structurally comprises an interlocking lever 51, a push plate 52, an upper bracket 53, a shifting plate 54, a spacer 55, a lower bracket 56, a trip shaft 57, a tension spring 58, a fixed bent plate 59, an interlocking crank arm 510, a gasket 511, an emergency opening push plate 512, a vacuum circuit breaker mechanism frame 513, a vacuum circuit breaker chassis frame 514, an interlocking plate 515 and an operation hole baffle 516. Wherein, the push plate 52, the upper bracket 53 and the lower bracket 56 are installed on the vacuum circuit breaker chassis frame 514. The fixed bent plate 59, the emergency opening push plate 512 and the operation hole baffle 516 are arranged on the chassis frame 514 of the vacuum circuit breaker. The interlocking rod 51 is made of hexagonal steel, one end of the interlocking rod passes through the upper bracket 53, the shifting plate 54 and the lower bracket 56, the other end of the interlocking rod passes through the fixed bent plate 59, the interlocking crank arm 510 and the gasket 511, the end is provided with a retainer groove, and the interlocking rod 51 is limited up and down through the fixed bent plate 59. The interlocking rod 51 and the fixed bent plate 59 are relatively static in the vertical direction, and the interlocking rod 51 rotates in the hole of the fixed bent plate 59. The dial plate 54 and the interlocking connecting lever 510 are designed with hexagonal holes to match with the connecting rod 51 to realize simultaneous rotation, wherein the interlocking connecting lever 510 and the connecting rod 51 are relatively static up and down. The dial plate 54 is movable up and down along the link lever 51. The upper and lower parts of the dial plate 54 are designed with an upper bracket 53 and a lower bracket 56. When the vacuum circuit breaker moves up and down, the upper bracket 53 and the lower bracket 56 drive the dial plate 54 to move up and down along the interlock lever 51. The upper bracket 53 and the lower bracket 56 are limited by the spacer 55, so that the dial plate 54 can reliably rotate between the bracket 53 and the lower bracket 56. The push plate 52 is fixed on the chassis frame 514 of the vacuum circuit breaker, and is designed with a guide groove which can move left and right. One end of the push plate 52 is in contact with the dial plate 4, and the other end is in contact with the trip shaft 7. When the pulling plate 54 rotates, the pushing plate 52 is driven to push the trip shaft 57, and the trip shaft 57 opens the vacuum circuit breaker. The push plate 52 is provided with a tension spring 58, and the tension spring 58 ensures that the push plate 52 can be reliably reset. The center of the interlocking crank arm 510 is designed to be a hexagonal hole to be matched with the interlocking rod 51, one end of the interlocking crank arm is contacted with the emergency opening push plate 512, the other end of the interlocking crank arm is connected with one end of the connecting plate 515, and the other end of the connecting plate 515 is connected with the operation hole baffle 516.

The novel interlocking mechanism for the vacuum circuit breaker is implemented specifically: when the vacuum circuit breaker chassis vehicle is operated to enable the vacuum circuit breaker to move up and down, an emergency opening push plate 512 needs to be operated, the emergency opening push plate 512 drives an interlocking connecting lever 510 to rotate, the interlocking connecting lever 510 opens an operation hole baffle 514 through a connecting plate 515, meanwhile, the interlocking connecting lever 510 drives a shifting plate 54 to rotate through an interlocking rod, the shifting plate 54 drives a tripping shaft 57 through a push plate 52 to enable the vacuum circuit breaker to be opened, an operation handle of the vacuum circuit breaker chassis vehicle is inserted at the moment, the operation handle limits the operation hole baffle 516, the tripping shaft 57 is limited through an interlocking mechanism, the circuit breaker is always in an opening state, the interlocking mechanism resets after the handle is pulled out, and the circuit breaker recovers normal opening and closing operations. This novel interlocking mechanism for vacuum circuit breaker has realized that the circuit breaker must be in the mechanical interlocking requirement of separating brake state when operating vacuum circuit breaker up-and-down motion, has urgent separating brake button operation urgent separating brake push pedal at the cubical switchboard design simultaneously, and the cubical switchboard state of closing the door also can realize manual urgent separating brake function, realizes the safe operation of switch, and the reliability is higher.

What has been described above are merely some embodiments of the present invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which all fall within the scope of the invention.

Claims (8)

1. The utility model provides an indoor metal enclosed switchgear's of interchange of novel pull-out type fixed stop device, its characterized in that, it sets up in the chassis car, including left spring bolt, right spring bolt, left jam plate, right jam plate, spacing round pin axle, interlocking plate and chain extension spring, a left side jam plate a tip with left spring bolt is connected, a right side jam plate a tip with right spring bolt is connected, left spring bolt and right spring bolt respectively outstanding in the both sides of chassis car, with will the chassis car is spacing in the cubical switchboard.

2. The novel draw-out indoor AC metal enclosed switchgear fixing and limiting device as claimed in claim 1, further comprising a left plastic handle and a right plastic handle located outside the switchgear body, wherein the left plastic handle is fixedly connected with the left lock plate, and the right plastic handle is fixedly connected with the right lock plate, and the circuit breaker can be drawn out from the switchgear and pushed in and limited by operating the left plastic handle and the right plastic handle respectively.

3. The fixing and limiting device of the novel draw-out indoor AC metal enclosed switchgear as claimed in claim 1, further comprising a reset spring, wherein one end of the reset spring is fixed on the left lock plate, the other end of the reset spring is fixed on the right lock plate, the reset spring is in a stretching state when the plastic handle is operated, and the reset spring is in a resetting state when the plastic handle is not operated.

4. The fixing and limiting device of the novel draw-out indoor AC metal enclosed switchgear as claimed in claim 2, further comprising an interlocking tension spring and an interlocking plate, wherein a left limiting pin is disposed on the left locking plate, a right limiting pin is disposed on the right locking plate, the interlocking tension spring is connected to the interlocking plate, when the circuit breaker moves linearly away from the chassis vehicle, the interlocking tension spring pushes the interlocking plate to pop out to be located between the left limiting pin and the right limiting pin, so that the circuit breaker cannot be drawn out of the switchgear.

5. The novel draw-out indoor AC metal enclosed switchgear fixing and limiting device as claimed in claim 1,

the chassis vehicle is provided with a breaker mechanism assembly through a ball screw assembly, the breaker mechanism assembly comprises a vacuum breaker and a breaker mechanism frame, and the vacuum breaker is fixed on the breaker mechanism frame through a solid-sealed pole and a screw nut;

the chassis car comprises a chassis car frame, and a left auxiliary guide assembly, a ball screw assembly and a rear auxiliary guide assembly which are arranged on the chassis car frame, wherein guide grooves are respectively formed in the left auxiliary guide mechanism and the rear auxiliary guide mechanism, and the guide grooves are matched with bearings arranged on the circuit breaker mechanism assembly.

6. The fixing and limiting device of the novel draw-out indoor AC metal enclosed switchgear of claim 5, wherein the ball screw assembly comprises a ball screw, a bearing and limiting sleeve, a screw nut, a thrust ball bearing, a linear bearing and an upper limiting sleeve,

the bearing limiting sleeve and the upper limiting sleeve are fixedly sleeved on the ball screw through the elastic cylindrical pin, the ball screw is located between the bearing limiting sleeve and the upper limiting sleeve and is connected in the screw nut in a threaded mode, the ball screw is further sequentially sleeved with the thrust ball bearing, the linear bearing and the lower limiting sleeve, the lower limiting sleeve is located in the chassis vehicle frame, the thrust ball bearing and the linear bearing are located between the chassis vehicle frame and the bearing limiting sleeve, and the linear bearing is installed on the chassis vehicle frame.

7. The fixing and limiting device of the novel draw-out indoor AC metal enclosed switchgear as claimed in claim 5, wherein the screw nut is fixedly connected with the breaker mechanism assembly through a fastener, the rotation of the ball screw drives the screw nut to make a linear motion on the ball screw, and the rotation of the screw nut drives the breaker mechanism assembly to make an up-and-down linear motion along the guide grooves of the left auxiliary guide mechanism and the rear auxiliary guide mechanism.

8. The fixing and limiting device of the novel draw-out indoor alternating current metal enclosed switchgear as claimed in claim 5, wherein the chassis vehicle further comprises an operating shaft and a transmission shaft, the transmission shaft and the operating shaft penetrate through a frame of the chassis vehicle, one end of the operating shaft is in transmission connection with the transmission shaft through a spur gear, the other end of the operating shaft is connected with an operating handle, and the operating handle is located outside a cabinet body of the switch cabinet.

Images