A pole-mounted circuit breaker

Abstract

The application discloses a pole-mounted circuit breaker, which comprises a fixed base, a vacuum circuit breaker and a power feeding pole mounted on both sides of the fixed base and connected through a contactor, an operating mechanism, a first rust removal mechanism and a second rust removal mechanism; the first rust removal mechanism is adapted to cooperate with the power feeding pole, and the second rust removal mechanism is adapted to cooperate with the contactor; the operating mechanism is adapted to drive the first rust removal mechanism and the second rust removal mechanism to grind the head of the power feeding pole and the contactor respectively during the process of driving the contactor to isolate. The application has the beneficial effects that the first rust removal mechanism and the second rust removal mechanism are provided, and the first rust removal mechanism and the second rust removal mechanism can be connected with the operating mechanism, so that the first rust removal mechanism and the second rust removal mechanism can grind the head of the power feeding pole and the contactor respectively during the process of lifting the contactor by the operating mechanism, so as to ensure that the contact position of the power feeding pole and the contactor is free of copper rust, thereby ensuring the use safety of the isolating switch.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-voltage power transmission, in particular to a pole-mounted circuit breaker. BACKGROUND

[0002] The pole-mounted circuit breaker refers to the circuit breaker installed and operated on the electric pole. The existing pole-mounted circuit breaker generally includes a vacuum circuit breaker; because the insulation medium of the arc-extinction gap and the contact after arc-extinction is high vacuum, it is named as such; it has the advantages of small size, light weight, suitable for frequent operation, and arc-extinction without maintenance, and is widely popularized in distribution networks. However, the existing vacuum circuit breaker is generally equipped with a disconnecting switch for use in use, which can ensure the safety of high-voltage electrical devices during maintenance work and can play a role in isolating voltage.

[0003] However, the existing pole-mounted circuit breaker has the following problems in use:

[0004] (1) Because it is used outdoors, the copper disconnecting switch will also rust, which can easily cause poor contact of the disconnecting switch and cause circuit failure.

[0005] (2) The pole-mounted circuit breaker is generally set bare, and small animals such as birds or squirrels can easily climb onto the circuit breaker, which can cause the circuit breaker to trip due to feces. SUMMARY

[0006] One of the purposes of the present application is to provide a pole-mounted circuit breaker that can solve at least one of the problems in the background art.

[0007] To achieve the above purpose, the technical solution adopted by the present application is as follows: a pole-mounted circuit breaker, comprising a fixed seat and a vacuum circuit breaker and a power supply column installed on both sides of the fixed seat and connected by a contactor; further comprising an operating mechanism, a first rust removal mechanism and a second rust removal mechanism; the first rust removal mechanism is adapted to cooperate with the power supply column, and the second rust removal mechanism is adapted to cooperate with the contactor; the operating mechanism is connected with the contactor, the first rust removal mechanism and the second rust removal mechanism respectively, and the operating mechanism is adapted to perform an isolation process including a first process and a second process; wherein the first process, the operating mechanism drives the contactor to just separate from the power supply column, and in this process, the first rust removal mechanism and the second rust removal mechanism do not work; the second process, the operating mechanism continues to drive the contactor to move away from the power supply column to the limit position, and in this process, the first rust removal mechanism and the second rust removal mechanism are adapted to grind the head of the power supply column and the head of the contactor respectively.

[0008] Preferably, the electrically conductive column has three, and the electrically conductive column includes an insulating seat and a terminal block; the first rust removal mechanism includes a first speed increasing assembly and three grinding assemblies; the grinding assembly is correspondingly slidingly installed in the mounting groove provided in the insulating seat, and the grinding assembly is adapted to be attached to the terminal block; the first speed increasing assembly is installed on the fixed seat, the input end of the first speed increasing assembly is connected with the operating mechanism, and the output end of the first speed increasing assembly is connected with the grinding assembly through a crank slider structure, so that when the second process is performed, the first speed increasing assembly is adapted to amplify the stroke of the operating mechanism to drive the grinding assembly to move back and forth along the mounting groove multiple times, thereby polishing the head of the terminal block through the grinding assembly.

[0009] Preferably, the grinding assembly includes a support frame and a pair of first grinding blocks; the support frame is in the shape of a "N" character, the first grinding blocks are symmetrically slidingly installed on both sides of the inside of the support frame, and the first grinding blocks and the corresponding sides of the support frame are elastically connected by at least one second spring; so that the first grinding blocks and the corresponding sides of the terminal block are elastically attached; when the second process is performed, the support frame is adapted to drive the first grinding blocks to slide back and forth along the mounting groove through the crank slider structure, thereby polishing the head of the terminal block through the first grinding blocks.

[0010] Preferably, the first speed increasing assembly includes a mounting seat, a first gear set and a strip-shaped plate; the mounting seat is fixed to the fixed seat; the first gear set is installed in the mounting seat, and the output end of the first gear set is connected with the grinding assembly through the crank slider structure; the strip-shaped plate is slidingly installed in the mounting seat, and the strip-shaped plate is provided with a first rack section, and the strip-shaped plate is adapted to be connected with the operating mechanism through the end portion; when the first process is performed, the strip-shaped plate is adapted to drive the first rack section to approach the input end of the first gear set under the drive of the operating mechanism; when the second process is performed, the strip-shaped plate is adapted to mesh the first rack section with the input end of the first gear set, thereby amplifying the stroke of the operating mechanism through the first gear set.

[0011] Preferably, the three blades are provided with a clamping groove for engaging with the energized column, and a guide groove in communication with the clamping groove; the second rust removal mechanism comprises a driving assembly, three second speed increasing assemblies and three second abrasive blocks; the driving assembly is fixed to the fixed seat, the second abrasive blocks are slidingly installed in the guide grooves, the second speed increasing assemblies are installed on the blades, the output ends of the second speed increasing assemblies are connected with the corresponding second abrasive blocks, and the input ends of the second speed increasing assemblies are matched with the driving assembly; when the second process is performed, the second speed increasing assemblies are adapted to move with the blades, and then the second abrasive blocks are driven to move along the clamping groove for multiple times of reciprocating movement through the cooperation of the driving assembly, so as to realize the grinding of the clamping groove.

[0012] Preferably, the driving assembly comprises three arc-shaped plates and a fixed frame; the arc-shaped plates are fixed to the fixed seat through the fixed frame; the arc-shaped plates are adjacent to the blades, and the centers of the arc-shaped plates are concentric with the rotating positions of the blades; the arc-shaped plates are provided with second rack segments; the second speed increasing assembly comprises a second gear set, a crankshaft and a traction plate; the second gear set is installed on the blades, the crankshaft is connected with the output end of the second gear set, and the second abrasive block and the crankshaft are connected through the traction plate; when the first process is performed, the second speed increasing assembly is adapted to rotate synchronously with the blades and move towards the second rack segments; when the second process is performed, the second gear set is adapted to mesh with the second rack segments through the input end, and then the second gear set amplifies the stroke of the second rack segments, so as to drive the crankshaft to drive the second abrasive block to move along the guide groove towards the clamping groove for multiple times of reciprocating movement through the traction plate.

[0013] Preferably, the blades comprise a pair of blade plates and a plurality of first springs; the blade plates are elastically and slidingly matched through the first springs; when the blades engage with the energized column, the distance between the blade plates is L; after the blades are separated from the energized column, the blade plates are in contact with the second abrasive blocks, and the distance between the blade plates is H; and 0

[0014] Preferably, a transparent protective cover for covering the energized column, the contactor, the first rust removal mechanism and the second rust removal mechanism is further installed on the fixed seat; the protective cover comprises a fixed part and a movable part, the fixed part is fixed to the fixed seat, and the movable part is rotatably installed on the fixed seat; the operating mechanism comprises a first driving shaft and a driven shaft which are rotatably installed on the fixed seat; the driven shaft is adapted to be connected with the movable part; the first driving shaft and the driven shaft are connected through a transmission structure; the first driving shaft is adapted to drive the movable part to open synchronously through the transmission structure in the process of being rotated in a forward direction to lift the contactor; the first driving shaft is further adapted to separately drive the movable part to open through reverse rotation after the contactor is engaged.

[0015] Preferably, the transmission structure comprises a first gear, a second gear, a third gear, a fourth gear and a fifth gear; the first gear is connected with the first driving shaft through a clutch assembly, the second gear is fixedly connected with the first driving shaft; the third gear is fixedly connected with the driven shaft, the fourth gear is rotatably installed on the driven shaft, the fourth gear is matched with the driven shaft through an avoiding structure, and the fourth gear is engaged with the second gear; the fifth gear is rotatably installed on the fixed seat, and the fifth gear is engaged with the first gear and the third gear respectively; the first driving shaft is further connected with the contactor through a clutch assembly; when the first driving shaft is rotated in a forward direction to lift the contactor, the driven shaft drives the movable part to rotate and open through the mutual engagement of the first gear, the fifth gear and the third gear, in this process, the fourth gear and the driven shaft do not interfere with each other through the avoiding structure; when the contactor is engaged and the first driving shaft is reversely rotated, the avoiding structure is matched, and then the driven shaft drives the movable part to rotate through the engagement of the second gear and the fourth gear, in this process, the clutch assembly is in a separated state.

[0016] Preferably, the avoiding structure comprises an avoiding groove and a block; the avoiding groove is arranged on the fourth gear, the block is arranged on the driven shaft, and the corresponding arc length of the avoiding groove is greater than the corresponding arc length of the block; when the contactor is in the engaged state, the block is in contact with the first side of the avoiding groove; when the first driving shaft is rotated in a forward direction to lift the contactor, the driven shaft slides relative to the second side of the avoiding groove through the block; when the contactor is kept engaged and the first driving shaft is reversely rotated, the driven shaft is matched with the first side of the avoiding groove through the block to realize synchronous rotation with the fourth gear.

[0017] Compared with the prior art, the application has the following beneficial effects:

[0018] Compared with the traditional pole-mounted circuit breaker, the first rust removal mechanism and the second rust removal mechanism are arranged, the first rust removal mechanism and the second rust removal mechanism can be connected with the operating mechanism, and then in the process that the operating mechanism lifts the contactor, the first rust removal mechanism and the second rust removal mechanism can polish the head of the contactor and the power supply column respectively, so that the contact position of the contactor and the power supply column is not left with copper rust, and the use safety of the disconnecting switch is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall structure schematic diagram of the application.

[0020] Figure 2 It is the structure schematic diagram of the application after removing the protective cover.

[0021] Figure 3 It is the structure schematic diagram of the power supply column in the application.

[0022] Figure 4 It is the structure schematic diagram of the first rust removal mechanism in the application.

[0023] Figure 5 It is the structure schematic diagram of the connecting plate assembly in the application.

[0024] Figure 6 It is the exploded state schematic diagram of the grinding assembly in the application.

[0025] Figure 7 It is the cooperation structure schematic diagram of the operating mechanism and the first speed increasing assembly in the application.

[0026] Figure 8 It is the structure schematic diagram that the first rust removal mechanism polishes the wiring board in the application.

[0027] Figure 9 It is the structure schematic diagram of the contactor assembly in the application.

[0028] Figure 10 It is the exploded state schematic diagram of the contactor assembly in the application.

[0029] Figure 11 It is the structure schematic diagram of the second rust removal mechanism in the application.

[0030] Figure 12 It is the connection structure schematic diagram of the second speed increasing assembly and the second grinding block in the application.

[0031] Figure 13 It is the cooperation structure schematic diagram of the second speed increasing assembly and the driving assembly in the application.

[0032] Figure 14 It is the exploded state schematic diagram of the protective cover in the application.

[0033] Figure 15 Structure diagram of operating mechanism in the application.

[0034] Figure 16 Structure diagram of operating mechanism in the application. Figure 15

[0035] Structure diagram of operating mechanism in the application. Figure 17

[0036] Structure diagram of operating mechanism in the application. Figure 18

[0037] Structure diagram of operating mechanism in the application. Figure 19

[0038] Structure diagram of operating mechanism in the application. Figure 20

[0039] Structure diagram of operating mechanism in the application. Figure 21 Figure: fixed seat 100, vacuum circuit breaker 200, energized column 300, insulation seat 310, installation groove 311, opening 312, wiring board 320, contactor 4, shutter 41, first spring 42, clamping groove 401, guide groove 402, operating mechanism 5, first drive shaft 51, first crank 511, second crank 512, drive plate 513, first gear 514, second gear 515, operating rod 52, driven shaft 53, third gear 531, fourth gear 532, avoiding groove 5320, block 533, fifth gear 54, clutch assembly 55, first sprocket 530, first rust removal mechanism 6, first speed increasing assembly 61, mounting seat 611, first gear set 612, strip plate 613, first rack segment 6130, traction groove 6131, second drive shaft 62, cam 621, connecting plate assembly 63, first connecting plate 631, second connecting plate 632, torsional spring 633, grinding assembly 64, support frame 641, first grinding block 642, guide rod 6421, second spring 643, second rust removal mechanism 7, drive assembly 71, fixed frame 711, arc plate 712, second rack segment 7120, second grinding block 72, second speed increasing assembly 73, second gear set 731, crankshaft 732, traction plate 733, protective cover 8, fixed part 81, movable part 82, second sprocket 820.

[0040] DETAILED DESCRIPTION

[0041] ​Hereinafter, the present application will be further described in conjunction with specific embodiments, and it should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict.

[0042] In the description of the present application, it should be noted that for orientation words such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0043] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0044] One of the preferred embodiments of the present application is shown in Figure 1 and Figure 21 A pole-mounted circuit breaker includes a fixed seat 100, and a vacuum circuit breaker 200 and a power feeding pole 300 mounted on both sides of the fixed seat 100 and connected by a contact 4. It also includes an operating mechanism 5, a first rust removal mechanism 6 and a second rust removal mechanism 7; the first rust removal mechanism 6 can cooperate with the power feeding pole 300, and the second rust removal mechanism 7 can cooperate with the contact 4; the operating mechanism 5 is connected with the contact 4, the first rust removal mechanism 6 and the second rust removal mechanism 7 respectively; so that the operating mechanism 5 can perform an isolation breaking process including a first process and a second process.

[0045] In the first process, the operating mechanism 5 can drive the contact 4 to lift to just separate from the power feeding pole 300; in this process, the first rust removal mechanism 6 and the second rust removal mechanism 7 do not work. In the second process, the operating mechanism 5 continues to drive the contact 4 to move away from the power feeding pole 300 to the limit position; in this process, the first rust removal mechanism 6 and the second rust removal mechanism 7 can respectively grind the head of the power feeding pole 300 and the head of the contact 4.

[0046] It should be understood that high-voltage transmission lines are generally three-phase power; therefore, the number of vacuum circuit breakers 200, power feeding poles 300 and contacts 4 is three. Moreover, one end of the contact 4 is rotatably connected with the connection end of the vacuum circuit breaker 200, and the other end of the contact 4 can engage with the corresponding power feeding pole 300.

[0047] In the present embodiment, as shown in Figure 2、 Figure 7 、 Figure 15 、 Figure 19 and Figure 20 As shown in the figure, the operating mechanism 5 includes a first driving shaft 51 and three operating rods 52; three second cranks 512 are axially spaced on the first driving shaft 51, the upper end of the operating rod 52 is hinged to the middle part of the contactor 4, and the lower end of the operating rod 52 is hinged to the second crank 512; so that when the first driving shaft 51 rotates forward, the first driving shaft 51 can drive the operating rod 52 to lift the contactor 4 through the second crank 512, until the contactor 4 is disengaged from the corresponding energized column 300 and rotates to the limit position, to ensure the safety of the maintenance personnel.

[0048] Specifically, as shown in the figure, Figure 15 The rotation of the first driving shaft 51 can be manually driven or electrically driven. When manually driven, the operator can manually drive through the driving plate 513 installed at the end of the first driving shaft 51. When electrically driven, a motor can be installed on the fixed seat 100, which can be directly connected to the first driving shaft 51 or connected through transmission structures such as chain wheels or pulleys, so that the operator controls the rotation of the motor to control the rotation of the first driving shaft 51.

[0049] One embodiment of the present application, as shown in the figure, Figures 3 to 8 The energized column 300 includes an insulating seat 310 of ceramic material and a wiring board 320 of copper material. The upper part of the insulating seat 310 is provided with a mounting groove 311, the wiring board 320 is L-shaped, the wiring board 320 is fixedly arranged in the insulating seat 310, and the upper end of the wiring board 320 is used to engage with the head of the contactor 4, and the lower end of the wiring board 320 is used to connect with the high-voltage wire.

[0050] Meanwhile, the first rust removal mechanism 6 includes a first speed increasing assembly 61 and three grinding assemblies 64. The grinding assembly 64 is correspondingly slidingly installed in the mounting groove 311 of the insulating seat 310, and the grinding assembly 64 can be kept in contact with the wiring board 320. The first speed increasing assembly 61 is installed on the fixed seat 100, the input end of the first speed increasing assembly 61 is connected with the first driving shaft 51, and the output end of the first speed increasing assembly 61 is connected with the grinding assembly 64 through a crank slider structure. Thus, during the second process, the first speed increasing assembly 61 can amplify the rotation stroke of the first driving shaft 51 to drive the grinding assembly 64 to move back and forth along the mounting groove 311 multiple times, so as to polish the head of the wiring board 320 through the grinding assembly 64; to ensure that the head position of the wiring board 320 will not have copper rust.

[0051] In this embodiment, as shown in the figures, Figure 6 and Figure 8As shown, the grinding assembly 64 comprises a support frame 641 and a pair of first grinding blocks 642. The support frame 641 is in sliding fit with the mounting groove 311 and is in the shape of a "N" character, the first grinding blocks 642 are symmetrically installed on the inner sides of the support frame 641, and the corresponding sides of the first grinding blocks 642 and the support frame 641 are elastically connected by at least one second spring 643; so that the first grinding blocks 642 can elastically fit the corresponding sides of the terminal block 320 under the elastic force of the second spring 643. Thus, when the second process is performed, the support frame 641 can drive the first grinding blocks 642 to reciprocally slide along the mounting groove 311 under the driving of the crank slider structure, and then polish the head of the terminal block 320 by the fitting of the first grinding blocks 642 and the terminal block 320.

[0052] Specifically, as shown in Figure 6 The first grinding block 642 is provided with at least one guide rod 6421, and the two sides of the support frame 641 are provided with corresponding guide holes, and the first grinding block 642 can be in sliding fit with the guide holes through the guide rod 6421. At the same time, the second spring 643 is sleeved on the guide rod 6421, and the two ends of the second spring 643 abut against the support frame 641 and the first grinding block 642 respectively; so that the first grinding block 642 can abut against the side wall of the terminal block 320 under the elastic force of the second spring 643.

[0053] It can be understood that, with the increase of the grinding times, the thickness of the head of the terminal block 320 gradually thins. At this time, the first grinding block 642 can move under the elastic force of the second spring 643, so as to ensure that the first grinding block 642 always abuts against the side wall of the terminal block 320. And the change amount of the thickness of the terminal block 320 has no obvious effect on the elastic force of the second spring 643; that is, the change amount of the thickness of the terminal block 320 is much smaller than the compression amount of the second spring 643; so as to ensure that the grinding force of the second grinding block 642 on the terminal block 320 can basically remain unchanged.

[0054] At the same time, the number of guide rods 6421 can be selected according to actual needs, for example, as shown in 6, the number of guide rods 6421 is two, and the two guide rods 6421 are arranged at intervals. Then the number of second springs 643 and guide holes is corresponding four.

[0055] In this embodiment, as shown in Figure 7As shown, the first speed increasing assembly 61 comprises a mounting base 611, a first gear set 612 and a strip-shaped plate 613. The mounting base 611 is fixed to the fixed base 100; the first gear set 612 is mounted in the mounting base 611, and the output end of the first gear set 612 is connected to the grinding assembly 64 through a crank slider structure; the strip-shaped plate 613 is slidingly mounted in the mounting base 611, and a first rack section 6130 is arranged on the strip-shaped plate 613, and the strip-shaped plate 613 can be connected to the first crank 511 arranged on the first driving shaft 51 through the end portion. When the blade 4 is in the engaged state, the first rack section 6130 and the input end of the first gear set 612 are arranged at intervals. When the first process is performed, the first driving shaft 51 drives the first crank 511 to rotate forward, and then the first crank 511 can drive the strip-shaped plate 613 to slide towards the input end of the first gear set 612, so that the first rack section 6130 on the strip-shaped plate 613 approaches the input end of the first gear set 612. When the second process is performed, the first driving shaft 51 drives the first crank 511 to continue to rotate forward, and then the first crank 511 can drive the strip-shaped plate 613 to continue to slide towards the input end of the first gear set 612, so that the strip-shaped plate 613 is engaged with the input end of the first gear set 612 through the first rack section 6130; then the first gear set 612 can amplify the rotation stroke of the first crank 511 to drive the grinding assembly 64 to slide back and forth along the mounting groove 311 multiple times.

[0056] Specifically, as shown in the figure, Figure 7 As shown, one end of the strip-shaped plate 613 away from the first gear set 612 is provided with a traction groove 6131, and the end portion of the first crank 511 is slidingly connected to the traction groove 6131 through a traction rod. When the first driving shaft 51 rotates forward, the relative sliding of the traction rod along the traction groove 6131 can drive the strip-shaped plate 613 to slide in the extension direction.

[0057] It can be understood that when the blade 4 is in the engaged state, the interval between the first rack section 6130 and the input end of the first gear set 612 is X. Then the rotation angle of the first driving shaft 51 corresponding to the movement of the strip-shaped plate 613 by X distance is at least equal to the angle corresponding to the lifting of the blade 4 to just separate from the head portion of the terminal strip 320. In order to avoid interference between the blade 4 and the grinding assembly 64 in the first process.

[0058] Meanwhile, in order to ensure the grinding quality of the grinding assembly 64 to the terminal block 320, the grinding assembly 64 needs to grind the terminal block 320 for multiple times. Generally, the first driving shaft 51 lifts the angle of the movable blade 4 by about 90°; if the first rack segment 6130 is directly connected with the crank slider structure, the sliding stroke of the strip-shaped plate 613 driven by the first crank 511 in the process of lifting the movable blade 4 can drive the grinding assembly 64 to reciprocate Z times; generally, the value of Z is 4-8. After adding the first gear set 612, the stroke of the strip-shaped plate 613 can be enlarged by 4-10 times; that is, the reciprocating times of the grinding assembly 64 can reach 16-80 times; thus, the copper rust generated at the head of the terminal block 320 can be effectively polished off.

[0059] It can also be understood that the specific structure of the first gear set 612 is known to those skilled in the art, and therefore will not be described in detail here.

[0060] In the embodiment, as shown in Figure 4 , Figure 5 and Figure 8 , the first rust removal mechanism 6 further comprises a second driving shaft 62 and three connecting plate assemblies 63. The second driving shaft 62 is rotatably installed on the fixed seat 100, and the second driving shaft 62 is connected with the output end of the first gear set 612. One end of the connecting plate assembly 63 is hingedly connected with the corresponding grinding assembly 64, and the other end of the connecting plate assembly 63 is rotatably connected with the second driving shaft 62. Then, the second driving shaft 62, the connecting plate assembly 63 and the grinding assembly 64 can form the above-mentioned crank slider structure; wherein, the second driving shaft 62 is relative to the crank, the connecting plate assembly 63 is relative to the connecting rod, and the grinding assembly 64 is relative to the slider.

[0061] Specifically, the specific structure of the above-mentioned crank slider structure has multiple structures, including but not limited to the following two structures.

[0062] Structure one: as shown in Figure 3 , Figure 4 , Figure 5 and Figure 8As shown, one side of the mounting groove 311 is provided with an opening 312. The connecting plate assembly 63 comprises a first connecting plate 631 and a second connecting plate 632 which are hingedly connected to each other through a first end; the second end of the first connecting plate 631 is hingedly connected to the insulating base 310, and the second end of the first connecting plate 631 is connected to the insulating base 310 through a torsion spring 633; the second connecting plate 632 is located above the first connecting plate 631, and the second end of the second connecting plate 632 is hingedly connected to a support frame 641 of the grinding assembly 64 through the opening 312. The second drive shaft 62 is provided with three cams 621 corresponding to the electrified column 300 in the axial direction; each cam 621 is in abutting engagement with a corresponding first connecting plate 631. In the process of the first drive shaft 51 being positively rotated to lift the brake shoe 4, the second drive shaft 62 can be continuously rotated under the drive of the first gear set 612, and then continuously press the first connecting plate 631 through the cam 621 to drive the second connecting plate 632 to drive the grinding assembly 64 to slide back and forth along the mounting groove 311 multiple times.

[0063] It can be understood that the protruding part of the cam 621 can be multiple, for example Figure 4 and Figure 8 As shown, the protruding part of the cam 621 has two, so that the polishing times of the grinding assembly 64 can be doubled again. For example Figure 8 , the specific working process of structure one is: when the brake shoe 4 is in the engaged state, the included angle between the first connecting plate 631 and the second connecting plate 632 is α; when the protruding part of the cam 621 presses the first connecting plate 631, the first connecting plate 631 and the second connecting plate 632 are simultaneously rotated to increase the value of the included angle α; and then under the condition that the length of the first connecting plate 631 and the second connecting plate 632 does not change, the distance between the second ends of the first connecting plate 631 and the second connecting plate 632 increases, that is, the grinding assembly 64 moves from the inside of the mounting groove 311 to the head of the terminal plate 320; in this process, the torsion spring 633 is in a continuous compression state. After the protruding part of the cam 621 moves away from the first connecting plate 631, the first connecting plate 631 can be reset and rotated under the elastic force of the torsion spring 633, and then the second connecting plate 632 can pull the grinding assembly 64 to reset and slide to the initial position; so as to complete a grinding cycle of the grinding assembly 64.

[0064] Structure two: one side of the installation groove 311 is provided with an opening 312; the second driving shaft 62 is provided with three corresponding crankshaft sections along the axial direction, one end of the connecting plate assembly 63 is rotationally connected with the corresponding crankshaft section, and the other end of the connecting plate assembly 63 passes through the opening 312 and is hingedly connected with the support frame 641 of the grinding assembly 64. In the process of rotating the second driving shaft 62, the connecting plate assembly 63 can drive the grinding assembly 64 to slide back and forth along the installation groove 311 through the crankshaft section multiple times; thus, the first grinding block 642 can be elastically attached to the terminal block 320 to achieve polishing.

[0065] It should be known that part or all of the parts of the first rust removal mechanism 6 can be made of insulating and high-temperature resistant plastic material to avoid the influence of metal material on the operation of the disconnector under the condition of meeting the use strength.

[0066] One of the embodiments of the present application is shown in Figures 9 to 13 The head of the contactor 4 is provided with a clamping groove 401 for engaging with the terminal block 320 on the live column 300; the middle part of the contactor 4 is provided with a guide groove 402 in communication with the clamping groove 401. The second rust removal mechanism 7 includes a driving assembly 71, three second speed increasing assemblies 73 and three second grinding blocks 72. The driving assembly 71 is fixed to the fixed seat 100; the second grinding block 72 is slidingly installed in the guide groove 402 of each contactor 4; the second speed increasing assembly 73 is installed on each contactor 4, the output end of the second speed increasing assembly 73 is connected with the corresponding second grinding block 72, and the input end of the second speed increasing assembly 73 can be matched with the driving assembly 71. Thus, in the second process, the second speed increasing assembly 73 can move with the contactor 4, and then drive the second grinding block 72 to move back and forth along the guide groove 402 to the clamping groove 401 multiple times through the cooperation with the driving assembly 71 to achieve the grinding of the clamping groove 401.

[0067] In this embodiment, as Figures 11 to 13As shown, the driving assembly 71 includes three arc-shaped plates 712 and a fixing frame 711; the arc-shaped plates 712 are fixed to the fixing base 100 through the fixing frame 711. The arc-shaped plates 712 correspond to the side edges of each of the shutters 4, and the centers of the arc-shaped plates 712 are concentric with the rotating positions of the shutters 4. Each of the arc-shaped plates 712 is provided with a second rack segment 7120. The second speed increasing assembly 73 includes a second gear set 731, a crankshaft 732 and a traction plate 733; the second gear set 731 is installed on the side of the shutter 4, the crankshaft 732 is connected with the output end of the second gear set 731, and the second grinding block 72 and the crankshaft 732 are connected through the traction plate 733. When the shutter 4 is in the engaged state, the input end of the second gear set 731 is spaced apart from the second rack segment 7120 on the corresponding arc-shaped plate 712. When the first process is performed, the second speed increasing assembly 73 can rotate synchronously with the shutter 4 and move towards the second rack segment 7120 until the input end of the second gear set 731 is just in contact with the second rack segment 7120. When the second process is performed, the second gear set 731 can be engaged with the second rack segment 7120 through the input end, and then the second gear set 731 can amplify the stroke of the second rack segment 7120 to drive the crankshaft 732 to drive the second grinding block 72 to move back and forth along the guide groove 402 to the clamping groove 401 multiple times.

[0068] It can be understood that, as Figure 13 shown, when the shutter 4 is in the engaged state, the interval arc length between the second rack segment 7120 and the input end of the second gear set 731 is Y. Then, the arc length corresponding to the rotating angle required for the second gear set 731 to be lifted to just separate from the head of the terminal block 320 is less than or equal to Y, so as to avoid the interference between the second grinding block 72 and the terminal block 320 in the first process.

[0069] Meanwhile, in order to ensure the polishing quality of the second grinding block 72 on the clamping groove 401 of the shutter 4, the second grinding block 72 needs to polish the clamping groove 401 multiple times. Generally, the rotating angle of the first driving shaft 51 to lift the shutter 4 is about 90°. If the crankshaft 732 is directly engaged with the second rack segment 7120 through a gear, the engagement stroke between the second rack segment 7120 and the gear in the process of lifting the shutter 4 by the first driving shaft 51 can drive the second grinding block 72 to move back and forth W times. Generally, the value of W is 5-10. After adding the second gear set 731, the engagement stroke between the second rack segment 7120 and the gear can be amplified by 4-10 times. That is, the moving back and forth times of the second grinding block 72 can reach 20-100 times, so as to effectively polish away the copper rust generated in the clamping groove 401 of the head of the shutter 4.

[0070] It should be appreciated that the specific structure of the second gear set 731 is known to those skilled in the art, and therefore will not be described in detail here.

[0071] It can also be understood that the traditional blade 4 is a whole structure, so after the second grinding block 72 grinds the clamping groove 401 multiple times, the relative size of the clamping groove 401 will become larger; at the same time, the head of the terminal block 320 is being thinned as it is ground, which in turn causes the clamping groove 401 and the head of the terminal block 320 to not be tightly engaged, and contact failure is likely to occur.

[0072] At the same time, the relative size of the clamping groove 401 becomes larger, which also causes the contact effect of the second grinding block 72 to become worse; that is, as the number of grinding times increases, the grinding effect of the second grinding block 72 on the clamping groove 401 gradually becomes worse.

[0073] Therefore, in order to ensure the stability of the connection between the blade 4 and the terminal block 320, and to ensure the grinding effect of the second grinding block 72 on the clamping groove 401 of the blade 4, as shown in Figure 9 and Figure 10 The blade 4 includes a pair of blades 41 and a plurality of first springs 42; the blades 41 are slidably connected by a sliding rod arranged at intervals between them, the first springs 42 are sleeved on the corresponding sliding rods, and the two ends of the first springs 42 are respectively connected to the two blades 41. Thus, when the blade 4 is engaged with the terminal block 320 on the live column 300, the distance between the blades 41 is L; after the blade 4 is separated from the terminal block 320 on the live column 300, the blades 41 can be in close contact with the second grinding block 72 under the elastic force of the first springs 42, at which time the distance between the blades 41 is H; then 0

[0074] It can be understood that when the two blades 41 are completely in close contact, the width of the clamping groove 401 formed between the two blades 41 is smaller than the width of the terminal block 320; that is, at the beginning of the design, there is enough grinding allowance between the clamping groove 401 and the terminal block 320. And chamfer structures are provided at the ends of the clamping groove 401 and / or the terminal block 320 to facilitate the clamping of the clamping groove 401 and the terminal block 320.

[0075] It should be appreciated that some or all of the parts of the second rust removal mechanism 7 can be made of insulating and high-temperature resistant plastic materials to avoid the influence of metal materials on the operation of the disconnecting switch, while meeting the use strength.

[0076] It can also be understood that the first grinding block 642 and the second grinding block 72 each include a grinding stone and a fixing sleeve for fixing the grinding stone. The fixing sleeve can be made of plastic, and the specific material of the grinding stone is known to those skilled in the art. Common grinding stones include oil stones and the like.

[0077] One of the embodiments of the present application is shown in Figure 1 、 Figures 14 to 21 , and the fixed seat 100 is also provided with a transparent protective cover 8 for covering the power column 300, the contactor 4, the first rust removal mechanism 6 and the second rust removal mechanism 7. The protective cover 8 can ensure that the pole-mounted circuit breaker of the present application is not disturbed by the external environment during normal operation, thereby ensuring the working safety of the pole-mounted circuit breaker.

[0078] The protective cover 8 includes a fixed part 81 and a movable part 82. The fixed part 81 is fixed to the fixed seat 100, and the movable part 82 is rotatably installed on the fixed seat 100. The operating mechanism 5 includes a first driving shaft 51 rotatably installed on the fixed seat 100 and a driven shaft 53. The end of the driven shaft 53 can be connected to the movable part 82. At the same time, the first driving shaft 51 and the driven shaft 53 can be connected through a transmission structure. Thus, during the forward rotation of the first driving shaft 51 to lift the contactor 4, the transmission structure can drive the movable part 82 to rotate synchronously with the contactor 4 to achieve synchronous opening. The first driving shaft 51 can also be reversely rotated to separately drive the movable part 82 to open after the contactor 4 is in the engaged state, thereby facilitating the inspection of the maintenance personnel.

[0079] It can be understood that when the maintenance personnel needs to maintain the entire pole-mounted circuit breaker, the disconnector needs to be disconnected. At this time, the protective cover 8 can also open the movable part 82, thereby facilitating the maintenance of the maintenance personnel. When the maintenance personnel checks the pole-mounted circuit breaker, the internal structure can be directly viewed through the transparent protective cover 8. However, as the use time increases, the protective cover 8 is easily affected by the natural environment and becomes yellow. The movable part 82 of the protective cover 8 can be opened separately to facilitate viewing.

[0080] It can also be understood that the installation position of the movable part 82 can be concentric with the rotation position of the contactor 4, so as to avoid interference between the contactor 4 and the movable part 82 during lifting. The connection between the driven shaft 53 and the movable part 82 can be in various ways, including but not limited to the following two ways.

[0081] Way one: as shown in Figure 14 、 Figure 15 、 Figure 19 and Figure 20As shown, the mounting position of the movable part 82 is also provided with a second sprocket 820, and the end of the driven shaft 53 is provided with a first sprocket 530, and the first sprocket 530 and the second sprocket 820 are connected by a chain.

[0082] Method two: the mounting position of the movable part 82 is also provided with a second pulley, and the end of the driven shaft 53 is provided with a first pulley, and the first pulley and the second pulley are connected by a belt.

[0083] In this embodiment, as shown in Figure 15 , Figures 16 to 18 and Figure 21 , the first drive shaft 51 and the second crank 512 are connected by a clutch assembly 55. The transmission structure includes a first gear 514, a second gear 515, a third gear 531, a fourth gear 532, and a fifth gear 54. The first gear 514 is also connected with the first drive shaft 51 through the clutch assembly 55; the second gear 515 is fixedly connected with the first drive shaft 51; the third gear 531 is fixedly connected with the driven shaft 53; the fourth gear 532 is rotatably installed on the driven shaft 53, and the fourth gear 532 and the driven shaft 53 are matched by an avoiding structure, and the fourth gear 532 is engaged with the second gear 515; the fifth gear 54 is rotatably installed on the fixed seat 100, and the fifth gear 54 is engaged with the first gear 514 and the third gear 531 respectively. When the first drive shaft 51 rotates forward to lift the brake blade 4, the driven shaft 53 drives the movable part 82 to rotate forward to realize opening through the mutual engagement of the first gear 514, the fifth gear 54 and the third gear 531. In this process, the clutch assembly 55 is in the engaged state, and the fourth gear 532 and the driven shaft 53 do not interfere with each other through the avoiding structure. When the brake blade 4 is in the engaged state and the first drive shaft 51 is reversely rotated, the fourth gear 532 and the driven shaft 53 are matched by the avoiding structure, and then the driven shaft 53 drives the movable part 82 to rotate through the engagement of the second gear 515 and the fourth gear 532. In this process, the clutch assembly 55 is in the separated state.

[0084] It can be understood that the specific structure of the clutch assembly 55 is known to those skilled in the art, and the common clutch assembly 55 has a spring ball structure. Moreover, in order to ensure that the first drive shaft 51 has enough force to drive the brake blade 4 and the movable part 82 to rotate during rotation, the number of clutch assemblies 55 can be multiple.

[0085] It can also be understood that when the first driving shaft 51 rotates forward to lift the contactor 4, since the opening rotation direction of the movable part 82 is in the same direction as the rotation direction of the first driving shaft 51, three gears need to be meshed to ensure that the rotation direction of the driven shaft 53 is in the same direction as the rotation direction of the first driving shaft 51. When the movable part 82 is driven alone to rotate, since the rotation direction of the movable part 82 is opposite to the rotation direction of the first driving shaft 51, two gears need to be meshed to ensure that the rotation direction of the driven shaft 53 is opposite to the rotation direction of the first driving shaft 51.

[0086] Specifically, as shown in Figure 17 , Figure 18 and Figure 21 , the avoidance structure includes an avoidance groove 5320 and a block 533; the avoidance groove 5320 is arranged on the fourth gear 532, and the block 533 is arranged on the driven shaft 53, and the corresponding arc length of the avoidance groove 5320 is greater than the corresponding arc length of the block 533. When the contactor 4 is in the engaged state, the block 533 is in contact with the first side of the avoidance groove 5320; when the first driving shaft 51 rotates forward to lift the contactor 4, the driven shaft 53 slides relative to the second side of the avoidance groove 5320 through the block 533. When the contactor 4 remains engaged and the first driving shaft 51 rotates reversely, the driven shaft 53 is matched with the first side of the avoidance groove 5320 through the block 533 to realize synchronous rotation with the fourth gear 532.

[0087] For the convenience of understanding, the specific working process of the operating mechanism 5 driving the movable part 82 will be described in detail below. The counterclockwise direction is the positive direction, and the clockwise direction is the reverse direction.

[0088] (a) When the contactor 4 and the terminal plate 320 are in the engaged state, as shown in Figure 17 (1), the first driving shaft 51 is clamped with the first gear 514 and the second crank 512 through the clutch assembly 55; at the same time, as shown in Figure 17 (2), the avoidance groove 5320 of the fourth gear 532 is in contact with the block 533 on the driven shaft 53 through the first side.

[0089] (b) When the first driving shaft 51 rotates counterclockwise to lift the contactor 4, as shown in Figure 18 (1) and Figure 19As shown, the clutch assembly 55 is in the engaged state, and the first gear 514 and the second crank 512 rotate synchronously with the first drive shaft 51. This allows the second crank 512 to drive the switch 4 to rotate counterclockwise around its installation position via the operating lever 52, thereby separating it from the terminal block 320. During this process, the first gear 514, through meshing with the fifth gear 54, drives the third gear 531 to drive the driven shaft 53 to rotate counterclockwise, thus enabling the moving part 82 to rotate counterclockwise via chain drive for opening.

[0090] At the same time, such as Figure 18 As shown in (2), the second gear 515 rotates counterclockwise synchronously with the first drive shaft 51, and then drives the fourth gear 532 to rotate clockwise through meshing with the fourth gear 532. At this time, the driven shaft 53 rotates counterclockwise under the drive of the third gear 531. That is, the driven shaft 53 rotates relative to the stop block 533 and the clearance groove 5320 of the fourth gear 532, thereby ensuring that there is no interference between the driven shaft 53 and the fourth gear 532. Therefore, the center angle corresponding to the clearance groove 5320 is at least the sum of the rotation angle of the fourth gear 532 and the rotation angle of the driven shaft 53 during the opening of the movable part 82.

[0091] Subsequently, during the process of the first drive shaft 51 rotating clockwise to drive the switch 4 to close, the above process can be reversed to obtain the state (a) above.

[0092] (c) When the switch 4 is in the engaged closed state and the protective cover 8 needs to be opened, the first drive shaft 51 rotates clockwise. Since the switch 4 is in the closed state, it cannot continue to rotate clockwise; simultaneously, the movable part 82 is in the closed state and cannot continue to rotate clockwise; thus causing the clutch assembly 55 to be in the disengaged state. At this time, as... Figure 21 As shown in (1), the first drive shaft 51 rotates clockwise, which in turn drives the second gear 515 to rotate synchronously to mesh with the fourth gear 532 for counterclockwise rotation; then, through the abutment of the first side of the clearance groove 5320 against the abutment block 533 on the driven shaft 53, the driven shaft 53 is driven to rotate counterclockwise synchronously. Thus, the counterclockwise rotation of the driven shaft 53 can drive the movable part 82 to also rotate counterclockwise through chain transmission, i.e., as shown in (1), the first drive shaft 51 rotates clockwise, which in turn drives the second gear 515 to rotate counterclockwise, thus driving the fourth gear 532 for counterclockwise rotation. Figure 20 As shown.

[0093] In this process, such as Figure 21As shown in FIG. 2, the driven shaft 53 can drive the third gear 531 to rotate anticlockwise synchronously, and then drive the first gear 514 to rotate anticlockwise through the meshing of the fifth gear 54. That is, the rotating direction of the first gear 514 is opposite to that of the first driving shaft 51. Therefore, in order to ensure the smooth opening of the movable part 82, if the plurality of clutch assemblies 55 are arranged in the circumferential direction, the interval angle of adjacent clutch assemblies 55 needs to be greater than the sum of the rotating angle of the first driving shaft 51 and the rotating angle of the first gear 514; or, the plurality of clutch assemblies 55 can be arranged in the axial direction.

[0094] When it is necessary to re-close the movable part 82, the first driving shaft 51 can be rotated anticlockwise, and then the movable part 82 can be gradually reset under the action of gravity through the continuous abutment of the abutting block 533 of the driven shaft 53 and the first side of the avoiding groove 5320. In this process, since the clutch assembly 55 adopts the ball spring structure, the clutch assembly 55 and the inner wall of the first gear 514 and the second crank 512 are rolled and rubbed by the ball respectively; since the friction is small, it will not interfere with the closing state of the blade 4. Of course, the elastic coefficient of the first spring 42 can also be appropriately increased to ensure that the blade 4 and the wiring board 320 have sufficient biting force when closing.

[0095] It can also be understood that, whether the first driving shaft 51 rotates clockwise or anticlockwise to drive the opening process of the movable part 82, the traction groove 6131 on the strip-shaped plate 613 has sufficient length to cooperate with the first crank 511.

[0096] The above describes the basic principles, main features and advantages of the present application. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A pole-mounted circuit breaker comprising a fixed base and vacuum circuit breakers and power poles mounted on both sides of the fixed base and connected by a shutter; characterized in that, Also comprising: a first rust removal mechanism cooperating with the energized column; a second rust removal mechanism cooperating with the contactor; and an operating mechanism connected with the contactor, the first rust removal mechanism and the second rust removal mechanism, and adapted to perform an isolation process including a first process and a second process; wherein in the first process, the operating mechanism drives the contactor to just disengage from the energized column, and in this process, neither the first rust removal mechanism nor the second rust removal mechanism works; in the second process, the operating mechanism continues to drive the contactor to move to the limit position of isolation, and in this process, the first rust removal mechanism and the second rust removal mechanism are adapted to grind the head of the energized column and the head of the contactor, respectively; the energized column has three, and each of the energized columns includes an insulating seat and a terminal plate; the first rust removal mechanism includes: three grinding assemblies corresponding to the mounting slots provided in the insulating seat, and adapted to be in close contact with the terminal plate; and a first speed increasing assembly mounted on the fixed seat, the input end of the first speed increasing assembly is connected with the operating mechanism, and the output end of the first speed increasing assembly is connected with the grinding assembly through a crank slider structure; when the second process is performed, the first speed increasing assembly is adapted to amplify the stroke of the operating mechanism to drive the grinding assembly to move back and forth along the mounting slot multiple times, thereby polishing the head of the terminal plate through the grinding assembly; the contactor has three, and the head of each of the contactors is provided with a clamping groove for engaging with the energized column, and the middle part of each of the contactors is provided with a guide groove in communication with the clamping groove; the second rust removal mechanism includes: a driving assembly fixed to the fixed seat; three second grinding blocks corresponding to the guide grooves; and three second speed increasing assemblies corresponding to the contactors, the output end of the second speed increasing assembly is connected with the corresponding second grinding block, and the input end of the second speed increasing assembly cooperates with the driving assembly; when the second process is performed, the second speed increasing assembly is adapted to move with the contactor and cooperate with the driving assembly to drive the second grinding block to grind the clamping groove back and forth multiple times.

2. The pole-mounted circuit breaker of claim 1, wherein: the grinding assembly includes: a support frame in the shape of a "U"; and a pair of first grinding blocks symmetrically slidingly installed on the inside of both sides of the support frame, and the first grinding block and the corresponding side of the support frame are elastically connected by at least one second spring; so that the first grinding block and the corresponding side of the terminal plate are elastically in close contact; when the second process is performed, the support frame is adapted to drive the first grinding block to slide back and forth along the mounting slot under the drive of the crank slider structure, thereby polishing the head of the terminal plate through the first grinding block.

3. The pole-mounted circuit breaker of claim 1, wherein, the first speed increasing assembly includes: a mounting seat fixed to the fixed seat; a first gear set installed in the mounting seat, an output end of the first gear set being connected to the grinding assembly through the crank slider structure; and a strip-shaped plate slidingly installed in the mounting seat, the strip-shaped plate being provided with a first rack segment and being adapted to be connected to the operating mechanism through an end portion; when the first process is performed, the strip-shaped plate is adapted to drive the first rack segment to approach the input end of the first gear set under the driving of the operating mechanism; when the second process is performed, the strip-shaped plate is adapted to mesh the first rack segment with the input end of the first gear set, so that the operating mechanism stroke is amplified by the first gear set.

4. The pole-mounted circuit breaker of claim 1, wherein: The driving assembly comprises three arc-shaped plates adjacent to the shutter and a fixing frame for fixing the arc-shaped plates; the arc-shaped plates are concentric with the rotating position of the shutter, and each of the arc-shaped plates is provided with a second rack segment; the second speed increasing assembly comprises: a second gear set installed in the shutter; a crankshaft connected to an output end of the second gear set; and a traction plate connecting the second grinding block and the crankshaft; when the first process is performed, the second speed increasing assembly is adapted to rotate synchronously with the shutter and approach the second rack segment; when the second process is performed, the second gear set is adapted to mesh the input end with the second rack segment, so that the second gear set amplifies the second rack segment stroke to drive the crankshaft to drive the second grinding block to move along the guide groove to the clamping groove through the traction plate.

5. The pole-mounted circuit breaker of claim 1, wherein: The shutter comprises a pair of shutter plates and a plurality of first springs; the shutter plates are elastically slidingly matched through the first springs; when the shutter engages with the electrified column, the distance between the shutter plates is L; after the shutter is separated from the electrified column, the shutter plates are in contact with the second grinding block, at which time the distance between the shutter plates is H; 0 6. The pole-mounted circuit breaker of any one of claims 1-5, wherein: A transparent protective cover for covering the electrified column, the shutter, the first rust removal mechanism and the second rust removal mechanism is further installed on the fixed seat; the protective cover comprises a fixed portion and a movable portion, the fixed portion being fixed to the fixed seat, and the movable portion being rotationally installed on the fixed seat; the operating mechanism comprises a first driving shaft rotationally installed on the fixed seat and a driven shaft; the driven shaft being adapted to be connected to the movable portion; the first driving shaft and the driven shaft being connected through a transmission structure; the first driving shaft being adapted to drive the movable portion to be synchronously opened through the transmission structure in the process of being positively rotated to lift the shutter; the first driving shaft being further adapted to separately drive the movable portion to be opened through reverse rotation after the shutter is engaged.

7. The pole-mounted circuit breaker of claim 6, wherein: The first driving shaft is connected to the shutter through a clutch assembly; the transmission structure comprises: A first gear is connected with the first driving shaft through a clutch assembly; A second gear is fixedly connected with the first driving shaft; A third gear is fixedly connected with the driven shaft; A fourth gear is rotatably installed on the driven shaft, and the fourth gear and the driven shaft are cooperated through an avoiding structure, and the fourth gear is engaged with the second gear; and A fifth gear is rotatably installed on the fixed seat, and the fifth gear is engaged with the first gear and the third gear respectively; When the first driving shaft rotates forward to lift the brake blade, the driven shaft drives the movable part to rotate and open through the mutual engagement of the first gear, the fifth gear and the third gear, and in this process, the fourth gear and the driven shaft do not interfere with each other through the avoiding structure; When the brake blade is engaged and the first driving shaft is reversely rotated, the avoiding structure is abutted and cooperated, and then the driven shaft drives the movable part to rotate through the engagement of the second gear and the fourth gear, and in this process, the clutch assembly is in a separated state.

8. The pole-mounted circuit breaker of claim 7, wherein: The avoiding structure includes an avoiding groove and a block, the avoiding groove is arranged on the fourth gear, the block is arranged on the driven shaft, the corresponding arc length of the avoiding groove is greater than the corresponding arc length of the block, when the brake blade is in the engaged state, the block is just in contact with the first side of the avoiding groove, when the first driving shaft rotates forward to lift the brake blade, the driven shaft slides relative to the second side of the avoiding groove through the block, when the brake blade remains engaged and the first driving shaft reversely rotates, the driven shaft is abutted and cooperated with the first side of the avoiding groove through the block to realize the synchronous rotation with the fourth gear.

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