CN216288210U

CN216288210U - Circuit breaker

Info

Publication number: CN216288210U
Application number: CN202121594295.1U
Authority: CN
Inventors: 杨以亮; 吴昊; 沈维佳; 刘亚南; 吴越; 杨华庆; 袁亚; 高少武; 徐永富; 韦尚靖; 曹大军
Original assignee: Shanghai Chint Intelligent Technology Co Ltd
Current assignee: Shanghai Chint Intelligent Technology Co Ltd
Priority date: 2021-07-13
Filing date: 2021-07-13
Publication date: 2022-04-12
Anticipated expiration: 2031-07-13

Abstract

The utility model relates to the field of low-voltage electricity, in particular to a circuit breaker which comprises an operating mechanism, a draw bar and an anti-hot-plugging protection structure, wherein the operating mechanism comprises a rocker arm assembly, the anti-hot-plugging protection structure comprises a first transmission structure and a trigger structure, and the trigger structure comprises a first limiting part and a first driving part; when the breaker is opened, the first transmission structure and the trigger structure reset, so that the first limiting part moves into the breaker shell; when the breaker is switched on in the process of inserting or pulling the breaker mounting position, the first limiting part is limited in the shell of the breaker by the breaker mounting position, and the rocker arm assembly drives the first driving part to move through the first transmission structure so as to drive the traction rod to rotate, so that the operating mechanism is tripped; the hot plugging prevention protection structure of the circuit breaker can prevent the circuit breaker from being switched on in the process of inserting or pulling out the installation position of the circuit breaker.

Description

Circuit breaker

Technical Field

The utility model relates to the field of low-voltage electricity, in particular to a circuit breaker.

Background

A circuit breaker is one of important electrical components in the field of low-voltage electrical, and is used for connecting and disconnecting current; when overcurrent or short-circuit fault occurs in the circuit, the circuit breaker automatically cuts off the circuit, and the protection of circuits or equipment such as a power supply circuit, a motor and the like is realized. The circuit breaker used for plug-in installation in the distribution box cannot be conducted in the installation process so as to prevent accidents; in the installation process, if the handle of the breaker is pushed to the switching-on position, the breaker can not be switched on and electrified; in addition, the breaker can not be pulled out when being switched on and electrified, so that accidents are avoided.

Disclosure of Invention

The utility model aims to provide a circuit breaker, and an anti-hot plugging protection structure of the circuit breaker can prevent the circuit breaker from being switched on in the process of inserting or pulling out a circuit breaker mounting position.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a circuit breaker comprises a circuit breaker shell, an operating mechanism and a draw bar, wherein the operating mechanism and the draw bar are arranged in the circuit breaker shell; the operating mechanism comprises a rocker arm assembly, and the rocker arm assembly swings to drive the breaker to switch on or switch off; the traction rod is arranged in a rotating mode and is matched with the operating mechanism in a driving mode, and the traction rod is driven to rotate so as to trigger the operating mechanism to trip;

the circuit breaker further comprises an anti-hot-plugging protection structure, the anti-hot-plugging protection structure comprises a first transmission structure and a trigger structure which are movably connected, the trigger structure comprises a first limiting part and a first driving part in driving fit with the traction rod, and the first limiting part can move between the inner side and the outer side of the shell of the circuit breaker;

when the circuit breaker is switched on, the rocker arm assembly drives the first transmission structure and the trigger structure to act, so that the first limiting part protrudes out of the shell of the circuit breaker and is used for limiting and matching with the installation position of the circuit breaker; when the breaker is opened, the first transmission structure and the trigger structure reset, so that the first limiting part moves into the breaker shell; when the breaker is switched on in the process of inserting or pulling the breaker mounting position, the first limiting part is limited in the shell of the breaker by the breaker mounting position, and the rocker arm assembly drives the first driving part to move through the first transmission structure so as to drive the traction rod to rotate, so that the operating mechanism is tripped.

Preferably, the hot plug protection architecture still includes the first piece that resets, and the first piece that resets exerts the power that resets to trigger structure, makes trigger structure and first drive structure keep spacing cooperation, and when the circuit breaker was in the combined floodgate state, still made first spacing portion keep protruding outside the circuit breaker casing.

Preferably, the first restoring member is a torsion spring, a leaf spring, a compression spring or an extension spring.

Preferably, the first transmission structure is slidably disposed on the circuit breaker housing, and a sliding direction of the first transmission structure is perpendicular to a direction in which the circuit breaker is inserted into or pulled out of the circuit breaker mounting position.

Preferably, the first transmission structure is rotationally connected with the trigger structure, the first transmission structure further comprises a first transmission structure limiting part, and the first reset piece applies reset force to the trigger structure to enable the trigger structure to be in limit fit with the first transmission structure limiting part;

when the breaker is switched on in the process of inserting or pulling the breaker mounting position, the first limiting part is limited in the breaker shell by the breaker mounting position, the rocker arm assembly drives the trigger structure to rotate relative to the first transmission structure through the first transmission structure, and the trigger structure simultaneously drives the first driving part to move so as to drive the traction rod to rotate, so that the operating mechanism is tripped.

Preferably, the triggering structure comprises a rotating installation part and a first bearing part, the first bearing part is arranged above the traction rod and extends in a direction parallel to the traction rod, the triggering structure is rotatably connected with the first transmission structure through the rotating installation part, the first bearing part is connected with the rotating installation part, the first driving part and the first limiting part are both arranged on the first bearing part, and the first bearing part is in limit fit with the first transmission structure limiting part;

or, the triggering structure comprises a second bearing part, a rotating installation part and a third bearing part which are sequentially connected, the triggering structure is rotationally connected with the first transmission structure through the rotating installation part, the second bearing part is in driving fit with the traction rod, the first driving part is arranged on the second bearing part, the third bearing part is arranged above the traction rod and extends along the direction parallel to the traction rod, the first limiting part is arranged on the third bearing part, and the third bearing part is in limiting fit with the first transmission structure limiting part.

Preferably, the circuit breaker further comprises an anti-hot-plugging locking structure, the anti-hot-plugging locking structure comprises a second transmission structure and a limiting structure which are movably connected, the second transmission structure is in driving fit with the rocker arm assembly, and the limiting structure comprises a second limiting part; when the breaker is switched on, the rocker arm assembly drives the second transmission structure and the limiting structure to act, so that the second limiting part protrudes out of the breaker shell and is used for limiting and matching with the breaker mounting position; when the breaker is opened, the second transmission structure and the limiting structure reset, so that the second limiting part moves into the breaker shell; when the breaker is switched on in the process of inserting or pulling the breaker mounting position, the second limiting part is limited in the shell of the breaker by the breaker mounting position.

Preferably, the hot plug locking structure further comprises a second reset part, the second reset part applies a reset force to the limiting structure, the limiting structure and the second transmission structure are in limiting fit, and when the circuit breaker is in a closing state, the second limiting part is kept protruding out of the circuit breaker shell.

Preferably, the second transmission structure is slidably disposed on the circuit breaker housing, and a sliding direction of the second transmission structure is perpendicular to a direction in which the circuit breaker is inserted into or pulled out of the circuit breaker mounting position.

Preferably, the second transmission structure is rotationally connected with the limiting structure, the second transmission structure comprises a second transmission structure limiting part, and the second resetting piece applies resetting force to the limiting structure to enable the limiting structure and the second transmission structure limiting part to be in limiting fit; in the process that the breaker is inserted into or pulled out of the breaker mounting position, when the breaker is switched on, the second limiting part is limited in the breaker shell by the breaker mounting position, and the rocker arm assembly drives the limiting structure to rotate relative to the second transmission structure through the second transmission structure.

Preferably, the hot plug prevention protection structure and the hot plug prevention locking structure are respectively located at two ends of the swing direction of the rocker arm assembly, and the hot plug prevention protection structure and the hot plug prevention locking structure are both located on one side of the rocker arm assembly.

Preferably, the circuit breaker further comprises a rotating rod assembly, wherein the rotating rod assembly comprises a rotating rod and a rotating rod rotating shaft, and the rotating rod is pivotally arranged through the rotating rod rotating shaft; the rocker arm assembly is in driving fit with the rotating rod to drive the rotating rod to rotate, and two ends of the rotating rod are in driving connection with the first transmission structure and the second transmission structure respectively.

Preferably, the rotary rod assembly further comprises a rotary rod resetting piece, the rocker arm assembly drives the circuit breaker to be switched on, the resistance driving rotary rod which overcomes the rotary rod resetting piece simultaneously rotates towards the first direction, the rocker arm assembly drives the circuit breaker to be switched off, the rotary rod resetting piece drives the rotary rod to rotate towards the second direction, and the first direction and the second direction are opposite.

Preferably, the first transmission structure is a first push rod, the second transmission structure is a second push rod, a first rotary rod driving shaft and a second rotary rod driving shaft are arranged at two ends of the rotary rod respectively, the first push rod is provided with a first waist-shaped hole, the first rotary rod driving shaft is inserted into the first waist-shaped hole, the second push rod is provided with a second waist-shaped hole, the second rotary rod driving shaft is inserted into the second waist-shaped hole, the rotary rod rotates, and the first push rod and the second push rod are driven to slide linearly simultaneously.

Preferably, the first push rod further comprises a first push rod sliding plate, a first push rod driven plate and a first push rod connecting plate, the first push rod driven plate and the first push rod connecting plate are respectively connected with two ends of the first push rod sliding plate, the first push rod driven plate is provided with a first waist-shaped hole, the first push rod sliding plate is arranged on the shell of the circuit breaker in a sliding mode, the trigger structure is rotatably installed on the first push rod connecting plate, and the first transmission structure limiting portion is arranged on the first push rod connecting plate.

Preferably, the second push rod further comprises a second push rod stress plate, a second push rod transmission plate and a second push rod connection plate which are sequentially connected, the second push rod stress plate is connected with the rotary rod in a driving mode, the second push rod transmission plate is arranged on the shell of the circuit breaker in a sliding mode, the limiting structure is installed on the second push rod connection plate in a rotating mode, and the limiting portion of the second transmission structure is arranged on the second push rod connection plate.

Preferably, the first limiting part directly or indirectly drives the traction rod to rotate, so that the operating mechanism is tripped.

Preferably, the circuit breaker further comprises a magnetic flux assembly or a tripping mechanism, when the circuit breaker is in a closing state, the first limiting portion is squeezed to enable the first driving portion to drive the magnetic flux assembly or the tripping mechanism to act, and the magnetic flux assembly or the tripping mechanism drives the traction rod to rotate to enable the operating mechanism to trip.

Preferably, the magnetic flux assembly comprises an assembly support, and a third push rod and a drag hook which are arranged on the assembly support, the drag hook comprises a first matching plate, and the third push rod comprises a push rod clamping hook which is in driving matching with the first matching plate; the first limiting part is extruded, the first driving part drives the drag hook to relieve the limitation on the third push rod, and the third push rod acts and drives the traction rod to rotate through the push rod clamping hook and the first matching plate, so that the operating mechanism is released.

Preferably, the magnetic flux assembly includes a third push rod driving member, and the third push rod driving member applies a driving force to the third push rod to rotate the third push rod, so as to drive the traction rod to rotate through the push rod hook and the first matching plate.

Preferably, the operating mechanism further comprises a mechanism support, a tripping element, a locking element, a re-locking element, a crank element, a connecting rod and a main tension spring, the rocker arm assembly, the tripping element, the locking element and the re-locking element are respectively and rotatably arranged on the mechanism support, the tripping element is in locking fit with the locking element, the locking element is in limiting fit with the re-locking element, the re-locking element is in driving fit with the traction rod, the crank element is rotatably connected with the tripping element, one end of the connecting rod is rotatably connected with the crank element, the other end of the connecting rod is connected with a moving contact mechanism of the circuit breaker, one end of the main tension spring is connected with the rocker arm assembly, and the other end of the main tension spring is connected with the crank element;

the circuit breaker further comprises a wiring terminal, the wiring terminal comprises an incoming wiring terminal and an outgoing wiring terminal, the incoming wiring terminal and the outgoing wiring terminal are located at the same end of the circuit breaker shell, and the wiring terminal and the operating mechanism are respectively arranged at two opposite ends of the circuit breaker shell.

The circuit breaker is provided with the hot plugging prevention protection structure which is matched with the rocker arm assembly and the traction rod of the operating mechanism, and when the circuit breaker is switched on, the first limiting part of the circuit breaker protrudes out of the shell of the circuit breaker and is in limiting fit with the shell of the installation position, so that the circuit breaker can be prevented from being pulled out of the installation position of the circuit breaker in a switching-on state; when the breaker is switched on in the process of pulling out or inserting the breaker into the breaker mounting position, the first limiting part is limited in the breaker shell by the breaker mounting position, and the first transmission structure drives the first driving part to move towards the traction rod and drive the traction rod to rotate, so that the operating mechanism is tripped, and the breaker is prevented from being pulled out or inserted into the breaker mounting position in the switching-on state; the hot-line plugging prevention protection structure avoids hot-line installation or disassembly operation of the circuit breaker, and guarantees the safety of operators.

In addition, the circuit breaker is also provided with an anti-hot-plugging locking structure, and the anti-hot-plugging locking structure prevents the circuit breaker from being pulled out of a circuit breaker mounting position in a closing state, so that the power utilization safety is further improved.

Drawings

Fig. 1 is a schematic structural diagram of the circuit breaker of the present invention, showing a hot-plugging prevention protection structure, a hot-plugging prevention locking structure, and a matching structure of a rocker arm assembly, the hot-plugging prevention protection structure being in driving fit with a drawbar through a magnetic flux assembly;

FIG. 2 is an enlarged schematic view of portion A of FIG. 1 in accordance with the present invention;

fig. 3 is a schematic structural diagram of a circuit breaker according to a first embodiment of the present invention, showing a hot plug prevention protection structure, a hot plug prevention locking structure, and a matching structure of a rocker arm assembly;

figure 4 is a schematic diagram of an exploded structure of the circuit breaker of the present invention;

FIG. 5 is a schematic structural view of a second transmission structure and a limiting structure of the present invention;

FIG. 6 is a schematic diagram of the first transmission and triggering mechanism of the present invention;

FIG. 7 is a schematic view of the structure of the rotary lever of the present invention;

fig. 8 is a schematic view of the construction of a drawbar according to the present invention;

fig. 9 is a schematic structural diagram of the circuit breaker of the present invention, in which the circuit breaker is in the open state, and the first limiting portion and the second limiting portion are both retracted into the circuit breaker housing;

fig. 10 is a schematic structural diagram of the circuit breaker according to the present invention, in which the circuit breaker is in a closing state, and the first limiting portion and the second limiting portion both protrude outside the circuit breaker housing;

fig. 11 is a schematic structural diagram of the circuit breaker of the present invention, showing a hot plug prevention protection structure and a draw bar direct drive mating structure;

fig. 12 is a schematic structural diagram of the circuit breaker of the present invention, showing another hot plug prevention protection structure in direct drive engagement with the drawbar;

fig. 13 is a schematic structural view of the circuit breaker of the present invention, showing a specific structure of the flux assembly;

fig. 14 is an enlarged structural view of part B of fig. 13 according to the present invention.

Detailed Description

The following description will further describe embodiments of the circuit breaker of the present invention with reference to the embodiments shown in fig. 1 to 12. The circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-10, one embodiment of the circuit breaker of the present invention is shown.

As shown in fig. 1, 3, 9-10, the circuit breaker of the present embodiment includes a circuit breaker housing (not shown in the figures) and an operating mechanism and a draw bar 6 disposed in the circuit breaker housing; the operating mechanism comprises a rocker arm component 2, and the rocker arm component 2 swings to drive the breaker to switch on or switch off; the draw bar 6 is rotatably arranged in the shell of the circuit breaker and is in driving fit with the operating mechanism, and the draw bar is used for triggering the operating mechanism to trip.

The utility model has the improvement that the circuit breaker also comprises an anti-hot-plugging protection structure, wherein the anti-hot-plugging protection structure comprises a first transmission structure 50 and a trigger structure 51 which are movably connected, the trigger structure 51 comprises a first limiting part 515 and a first driving part 510 in driving fit with the traction rod 6, and the first limiting part 515 can move between the inner side and the outer side of the shell of the circuit breaker; when the circuit breaker is switched on, the rocker arm assembly 2 drives the first transmission structure 50 and the trigger structure 51 to act, so that the first limiting part 515 protrudes out of the shell of the circuit breaker and is used for being matched with the installation position of the circuit breaker; when the circuit breaker is opened, the first transmission structure 50 and the trigger structure 51 are reset, so that the first limiting part 515 is moved into the shell of the circuit breaker; when the circuit breaker is switched on in the process of inserting or pulling out the circuit breaker installation position, the first limiting part 515 is limited in the shell of the circuit breaker by the circuit breaker installation position, and the rocker arm assembly 2 drives the first driving part 510 to move through the first transmission structure 50 so as to drive the traction rod 6 to rotate, so that the operating mechanism is tripped.

When the circuit breaker is installed at the circuit breaker installation position and is installed in place, the first limiting part 515 protrudes out of the shell of the circuit breaker and is in limiting fit with the circuit breaker installation position when the circuit breaker is in a closing state, so that the circuit breaker cannot be pulled out of the circuit breaker installation position; in addition, when the circuit breaker is switched on in the process of inserting or pulling out the circuit breaker installation position, the first limiting part 515 is limited in the shell of the circuit breaker by the circuit breaker installation position, and the rocker arm assembly 2 drives the first driving part 510 to move through the first transmission structure 50 so as to drive the traction rod 6 to rotate, so that the operating mechanism is tripped, and the electricity utilization safety of an operator is ensured.

Specifically, when the circuit breaker is not installed in the circuit breaker installation position or is installed in the circuit breaker installation position and is installed in place: as shown in fig. 10, when the circuit breaker is switched on, the rocker arm assembly 2 drives the first transmission structure 50 and the trigger structure 51 to act, so that the first limiting portion 515 protrudes outside the circuit breaker housing for being matched with a circuit breaker mounting position; as shown in fig. 9, when the circuit breaker is opened, the first transmission structure 50 and the trigger structure 51 are reset, so that the first limit portion 515 moves into the circuit breaker housing.

Preferably, as shown in fig. 9, when the circuit breaker is opened, the rocker arm assembly 2 drives the first transmission structure 50 and the trigger structure 51 to reset. Of course, the first transmission structure 50 and the trigger structure 51 may be reset by other structures, for example, the first transmission structure and the trigger structure are reset by a reset spring (or a reset spring plate).

It should be noted that, in the circuit breaker, other parts of the operating mechanism (parts where position changes occur when the circuit breaker is switched on and off, such as a crank, a connecting rod, etc.) or the movable contact mechanism may also be used to drive the first transmission mechanism 50 and the trigger mechanism 51 to move or reset.

Preferably, as shown in fig. 1, 3, and 9-12, the first transmission structure 50 is slidably disposed on the circuit breaker housing, and a sliding direction of the first transmission structure 50 is perpendicular to a direction of inserting or removing the circuit breaker into or from the circuit breaker mounting position. Further, as shown in fig. 1, 3, 9-12, the circuit breaker housing further includes a mounting base 7, and the first transmission structure 50 is slidably disposed on the mounting base 7.

Specifically, as shown in fig. 1, 3, and 9-12, the first transmission structure 50 is slidably disposed on the mounting base 7 from side to side, and the circuit breaker moves up and down to be pulled out of or inserted into the circuit breaker mounting position.

It should be noted that the action of the first transmission mechanism 50 is not limited to be slidably disposed on the circuit breaker housing or the mounting base 7, and the first transmission mechanism 50 may also be rotatably disposed to drive the first limiting portion 515 to protrude outside the circuit breaker housing.

As shown in fig. 1, 3, 11, and 12, the hot plug protection structure further includes a first reset element 52, where the first reset element 52 applies a reset force to the trigger structure 51, so that the trigger structure 51 and the first transmission structure 50 maintain a limit fit, and when the circuit breaker is in a closed state, the first limit portion 515 keeps protruding outside the circuit breaker housing.

Preferably, as shown in fig. 1, 3, 11 and 12, the first transmission structure 50 is rotatably connected to the trigger structure 51, the first reset element 52 is a torsion spring, and is sleeved on a rotating shaft of the trigger structure 51, and two ends of the torsion spring are respectively matched with the first transmission structure 50 and the trigger structure 51. Of course, the first reset element 52 may also be another elastic element, such as an extension spring, a compression spring, a leaf spring, etc., as long as it can apply the necessary reset force to the trigger structure 51, so that the first position-limiting part 515 remains protruded outside the circuit breaker housing and keeps the trigger structure 51 in position-limiting engagement with the first transmission structure 50 without being pressed by an external force (e.g., by a circuit breaker mounting location).

Preferably, as shown in fig. 1 and 11-13, the first transmission structure 50 is rotatably connected to the trigger structure 51, the first transmission structure 50 includes a first transmission structure limiting portion 506, and the first resetting member 52 applies a resetting force to the trigger structure 51 to make it and the first transmission structure limiting portion 506 be in limiting fit; when the breaker is switched on in the process of inserting or pulling out the breaker installation position, the first limiting portion 515 is limited in the shell of the breaker by the breaker installation position, the rocker arm assembly 2 drives the trigger structure 51 to rotate relative to the first transmission structure 50 through the first transmission structure 50, and the trigger structure 51 drives the first driving portion 510 to move so as to drive the traction rod 6 to rotate, so that the operating mechanism is tripped.

Specifically, as shown in fig. 9 and 10, the first reset piece 52 enables the trigger structure 51 to be in limit fit with the first transmission structure limiting portion 506 of the first transmission structure 50, and when the rocker arm assembly 2 drives the first transmission structure 50 and the trigger structure 51 to move and reset, the first reset piece 52 is in fit with the first transmission structure limiting portion 506, so that the first transmission structure 50 and the trigger structure 51 are kept relatively still.

As another embodiment, the first transmission structure 50 and the driving mechanism 51 may also be overlapped, and the overlapping position of the first transmission structure 50 and the triggering structure 51 and the first transmission structure limiting portion 506 are respectively located at two sides of the triggering structure 51.

As shown in fig. 12, in order to arrange the first driving portion 510 and the first position-limiting portion 515 on the trigger structure 51, the following steps are performed: trigger structure 51 is including rotating installation department 511 and first bearing part, and first bearing part is established in traction lever 6 top and is followed and extend with traction lever 6 parallel direction, and trigger structure 51 rotates with first drive structure 50 through rotating installation department 511 and links to each other, and first bearing part links to each other with rotation installation department 511, and first drive division 510 and first spacing portion 515 all set up on first bearing part, and first spacing portion 515 sets up between rotation installation department 511 and first drive division 510, and first bearing part and the spacing cooperation of first drive structure spacing portion 506. On one hand, the distance between the first driving part 510 and the rotation mounting part 511 is larger than the distance between the first limiting part 515 and the rotation mounting part 511, so that the stroke of the first driving part 510 can be effectively enlarged, and the reliability of the action is improved, and on the other hand, the whole trigger structure 51 is positioned above the traction rod 6, is far away from the contact mechanism of the circuit breaker, and has good insulating property.

As shown in fig. 1, 3, 11, and 13-14, another arrangement of the first driving portion 510 and the first position-limiting portion 515 on the trigger structure 51 is as follows: trigger structure 51 is including consecutive second bearing part, rotation installation department 511 and third bearing part, and trigger structure 51 rotates with first drive structure 50 through rotating installation department 511 and links to each other, and the second bearing part sets up on the second bearing part with the first drive division 510 of traction lever 6 drive cooperation, and the third bearing part is established in traction lever 6 top and is extended along the direction that is on a parallel with traction lever 6, and first spacing portion 515 sets up on the third bearing part, and the third bearing part is spacing cooperation with first drive structure 506. The first driving portion 510 and the first limiting portion 515 are disposed at two ends of the rotation mounting portion 511, so that the space occupied by the trigger structure 51 can be effectively reduced.

Preferably, as shown in fig. 11, the second bearing part is connected with the rotation mounting part 511 in a bending way and is bent towards the direction of the traction rod 6; alternatively, as shown in fig. 1, 3, 13-14, the second bearing part and the third bearing part extend in opposite directions.

As shown in fig. 1, 3, 4, 6 to 7, 9 to 10, and 13 to 14, an embodiment of the hot plug prevention protection structure is shown: the first transmission structure 50 and the trigger structure 51 of the hot plug prevention protection structure are both arranged on the mounting base 7 of the breaker shell in a sliding manner; the first transmission structure 50 is a first push rod, the trigger structure 51 is a first limiting rod, one end of the first push rod is in driving fit with the rocker arm assembly 2, the other end of the first push rod is rotatably connected with the trigger structure 51, the first reset piece 52 is a torsion spring, the first reset piece is sleeved on a rotating shaft of the trigger structure 51, and two ends of the first reset piece are respectively matched with the first transmission structure 50 and the trigger structure 51; the first reset piece 52 applies a reset force to the trigger structure 51, so that the trigger structure 51 keeps a limit fit with the first transmission structure 50, and the first limit part 515 of the trigger structure 51 keeps protruding outside the circuit breaker housing when the circuit breaker is in a closed state. When the circuit breaker is not installed in the circuit breaker installation position or is installed in the circuit breaker installation position and is installed in place: as shown in fig. 10, when the circuit breaker is switched on, the rocker arm assembly 2 drives the first transmission structure 50 and the trigger structure 51 to act, so that the first limiting portion 515 protrudes outside the circuit breaker housing and is used for limiting and matching with the circuit breaker mounting position; as shown in fig. 9, when the circuit breaker is opened, the rocker arm assembly 2 drives the first transmission structure 50 and the trigger structure 51 to reset, so that the first limiting portion 515 moves into the circuit breaker housing; when the circuit breaker is switched on and switched off, the first transmission structure 50 and the trigger structure 51 are kept relatively static. In the process that the breaker is inserted into or pulled out of the breaker mounting position, when the breaker is switched on, the first limiting portion 515 is limited in the shell of the breaker by the breaker mounting position, the first rocker arm assembly 2 drives the trigger structure 51 to rotate relative to the first transmission structure 50 through the first transmission structure 50, and the trigger structure 51 drives the first driving portion 510 to move so as to drive the traction rod 6 to rotate, so that the operating mechanism is tripped.

Specifically, as shown in fig. 3-4 and in combination with fig. 9-10, the left end of the first transmission structure 50 is in driving fit with the rocker arm assembly 2, and the right end is rotatably connected with the triggering structure 51; the trigger structure 51 is rotatably connected with the first transmission structure 50 through a first pin shaft 50-51, a first reset piece 52 is sleeved on the first pin shaft 50-51, one end of the first pin shaft 50-51 is provided with a first pin shaft cap, the other end of the first pin shaft 50-51 is provided with a first limit clip 53 matched with the first pin shaft 50-51, and the trigger structure 51 is in limit matching with the first transmission structure 50 through the first reset piece 52. When the breaker is not installed in the breaker installation position or is installed in the breaker installation position and is installed in place: the rocker arm assembly 2 rotates anticlockwise to drive the circuit breaker to be switched on, and simultaneously the rocker arm assembly 2 drives the first transmission structure 50 and the trigger structure 51 to synchronously slide towards the right side, so that the first limiting part 515 of the trigger structure 51 protrudes out of the circuit breaker shell; the rocker arm assembly 2 rotates clockwise to drive the breaker to open the brake, and the first transmission structure 50 and the trigger structure 51 synchronously slide to the left side so that the first limiting part 515 retracts into the breaker shell; when the circuit breaker is switched on and switched off, the first transmission structure 50 and the driving joint 51 synchronously slide, and the first transmission structure and the driving joint are kept relatively static.

It should be noted that the first transmission structure 50 and the trigger structure 51 may slide to the left simultaneously under the driving of the rocker arm assembly 2, or may be driven by other reset structures (e.g. a reset spring or a reset spring leaf, etc.).

As shown in fig. 4 and 6, the first transmission structure 50 includes a first push rod sliding plate 502, a first push rod driven plate 500 and a first push rod connecting plate 505 respectively connected to two ends of the first push rod sliding plate 502, the first push rod sliding plate 502 is slidably disposed on the mounting base 7, a first sliding groove matched with the first push rod sliding plate 502 is disposed on the mounting base 7, the trigger structure 51 is rotatably mounted on the first push rod connecting plate 505 by a first pin 50-51, and a first transmission structure limiting portion 506 is disposed on the first push rod connecting plate 505. In this embodiment, the first transmission structure limiting portion 506 is a first push rod limiting plate disposed on the first push rod connecting plate 505 and is matched with the first limiting rod limiting groove 514 of the triggering structure 51. Further, as shown in fig. 9 and 10, the first push rod driven plate 500 is bent toward the side of the mounting base 7, the plane of the first push rod connecting plate 505 is perpendicular to the plane of the first push rod sliding plate 502, a side edge of one end of the first push rod sliding plate 502 protrudes and extends to form the first push rod driven plate 500, the first push rod connecting plate 505 is provided with a first push rod shaft hole 507 matched with the first pin 50-51, and the trigger structure 51 is provided with a first limit rod shaft hole 512 matched with the first pin 50-51. A first push rod head driving plate 503 and a first push rod tail driving plate 504 which are bent and abducted are further arranged between the other end of the first push rod sliding plate 502 and the first push rod connecting plate 505 in this embodiment, the first push rod sliding plate 502, the first push rod head driving plate 503 and the first push rod tail driving plate 504 are integrally in a Z-shaped structure, the first push rod sliding plate 502 and the first push rod tail driving plate 504 are arranged in parallel, one end of the first push rod connecting plate 505 is bent and connected with the first push rod tail driving plate 504, and the other end is bent to the side of the first push rod sliding plate 502.

Preferably, the first driving part 510 of the triggering mechanism 50 directly or indirectly drives the traction rod 6 to trip the operating mechanism. Specifically, the trigger structure 51 is rotatably mounted on the first transmission structure 50, when the circuit breaker is switched on by misoperation in the process of inserting or pulling out the circuit breaker mounting position, the first limiting portion 515 is limited in the circuit breaker shell by the circuit breaker mounting position, the first transmission structure 50 drives the trigger structure 50 to rotate relative to the first transmission structure 50, and the first driving portion 510 of the trigger structure 51 directly drives the traction rod 6 to rotate or indirectly drives the traction rod 6 to rotate through an intermediate structure, so that the operating mechanism is tripped.

As shown in fig. 1, 13-14, an embodiment of the first driving part 510 of the triggering mechanism 51 indirectly drives the traction rod 6 is shown: the circuit breaker also comprises a magnetic flux assembly 4, and the first driving part 510 is in driving fit with the traction rod 6 through the magnetic flux assembly 4. Further, the magnetic flux component 4 is arranged opposite to the traction rod 6, and the magnetic flux component 4 can drive the traction rod 6 to rotate when being triggered, so that the operating mechanism is tripped; when the circuit breaker fails (e.g., a short circuit or overload fault), its internal circuitry may trigger the flux assembly, or the flux assembly 4 may be triggered by remote control means. When the circuit breaker is switched on in the process of inserting or pulling out the circuit breaker installation position, the first limiting part 515 is limited in the shell of the circuit breaker by the circuit breaker installation position, the first transmission structure 50 drives the trigger structure 51 to rotate relative to the first transmission structure 50, so that the first driving part 510 drives the magnetic flux assembly 4 to act, the magnetic flux assembly 4 drives the traction rod 6 to rotate, the operating mechanism is tripped, the existing magnetic flux assembly 4 assembled in the circuit breaker indirectly drives the traction rod 6, the internal structure of the circuit breaker is facilitated to be simplified, and the internal space of the circuit breaker is saved.

As shown in fig. 1, 13-14, is one embodiment of the flux assembly 4: the magnetic flux assembly 4 comprises an assembly support 41, a third push rod 42 and a draw hook 43, the third push rod 42 is arranged on the assembly support 41 in a sliding mode, the draw hook 43 is arranged on the assembly support 41 in a rotating mode and is matched with the third push rod 42 in a locking mode, the draw bar 6 comprises a first matching plate 61, and the third push rod 42 comprises a push rod clamping hook 420 in driving matching with the first matching plate 61; when the circuit breaker is in a closing state, the first limiting portion 515 is extruded to move towards the inner direction of the circuit breaker shell, so that the first driving portion 510 drives the draw hook 43 to rotate, the draw hook 43 is released from being matched with the lock catch of the third push rod 42, and the third push rod 42 drives the draw bar 6 to rotate through the push rod clamping hook 420 and the first matching plate 61. Further, as shown in fig. 13 and 14, the middle of the drag hook 43 is rotatably disposed on the assembly bracket 41, one end of the drag hook is provided with a drag hook locking portion 430, the other end of the drag hook is provided with a drag hook which is in driving fit with the first driving portion 510 and is bent in a driven manner, the third push rod 42 comprises a third push rod locking portion 420 which is in locking fit with the drag hook locking portion 430, the third push rod locking portion 420 is provided with a clamping groove which is in locking fit with the drag hook locking portion 430, when the two are in locking fit, the drag hook locking portion 430 is positioned in the clamping groove and is in spacing fit with the third push rod locking portion 420, when the two are released from locking fit, the drag hook locking portion 430 is released from the clamping groove, and the drag hook locking portion 430 and the third push rod locking portion 420 are released from spacing fit; as shown in fig. 13 and 14, the magnetic flux assembly 4 further includes a third push rod driving member 44 and a hook resetting member 45, the third push rod driving member 44 (the third push rod driving member 44 is preferably a spring, and two ends of the third push rod driving member 44 are respectively matched with the third push rod 42 and the assembly bracket 41) drives the third push rod 42 to slide so as to drive the drawbar 6 to rotate, and the hook resetting member 45 (the hook resetting member 45 is preferably a torsion spring, and is sleeved on a rotating shaft of the hook 43, and two ends of the hook resetting member are respectively matched with the hook 43 and the assembly bracket 41) provides a resetting force for the hook 43 so as to keep the hook matching with the third push rod 42.

Preferably, as shown in fig. 1 and 13, in order to realize that the triggering structure 51 indirectly drives the traction rod 6 to rotate through the magnetic flux assembly 4, the first limiting portion 515 and the first driving portion 510 of the triggering structure 51 are distributed in the following manner: first spacing portion 515 and first drive division 510 are located trigger structure 51's both ends respectively, trigger structure 51 still includes and rotates rotation installation department 511 and first gag lever post extension board 513 that links to each other with first drive structure 50, first gag lever post extension board 513 and first drive division 510 link to each other and first gag lever post extension board 513 and first drive division 510 extend to opposite direction respectively with rotation installation department 511 both ends respectively, first spacing portion 515 sets up the one end of keeping away from rotation installation department 511 at first gag lever post extension board 513, the free end and the magnetic flux drag hook 43 drive fit of first drive division 510. The first limiting rod extending plate 513 is the third bearing portion, and the first driving portion 510 is the second bearing portion.

As shown in fig. 1 and 13-14, the layout of the hot plug prevention protection structure, the draw bar, the mounting base 7 and the magnetic flux assembly 4 is as follows: the first matching plate 61 is also positioned at the upper side of the traction rod 6, the trigger structure 51 is installed on the installation base 7 and positioned above the traction rod 6 and the first matching plate 61, the magnetic flux component 4 is fixedly installed on the installation base 7 and positioned at one side of the traction rod 6, the third push rod clamping hook 420 of the third push rod 42 is abutted against the first matching plate 61, and when the magnetic flux component 4 acts, the third push rod clamping hook 420 stirs the first matching plate 61 to enable the traction rod 6 to rotate anticlockwise; the draw hook 43 comprises a draw hook driven bend matched with the first driving part 510, the free end of the first driving part 510 is arranged in the draw hook driven bend, the first limiting part 515 is extruded to drive the first driving part 510 to drive the draw hook 43 to rotate, the draw hook 43 and the third push rod 42 are unlocked and locked, and the third push rod 42 is driven by the third push rod driving part 44 to pull the first matching plate 61 to enable the draw rod 6 to rotate anticlockwise.

As shown in fig. 11, a first embodiment in which the first driving part 510 of the trigger mechanism 51 directly drives the traction rod 6 is shown: the traction rod 6 is arranged on one side of the hot plugging prevention protection structure and comprises a traction rod spindle 60 which is rotatably arranged and a second matching plate 62 which is arranged on the traction rod spindle 60; the second matching plate 62 is located at the lower side of the traction rod 6, the first limiting portion 515 and the first driving portion 510 of the embodiment are respectively located at two ends of the trigger structure 51, the first limiting portion 515 is located at the upper side of the traction rod 6, the first driving portion 510 is bent from one side of the first transmission structure 50 to the lower side of the traction rod 6 and is arranged corresponding to the second matching plate 62, the first limiting portion 515 is squeezed, the trigger structure 51 is rotated, the first driving portion 510 is driven to move towards the second matching plate 62, and the traction rod 6 is directly driven to rotate anticlockwise through the second matching plate 62. Specifically, as shown in fig. 11, the triggering structure 51 includes a rotation mounting portion 511 connected to the first transmission structure 50 in a rotation manner and a first limiting rod extending plate 513 connected to the rotation mounting portion 511 in a bending manner, the first limiting portion 515 is connected to the first limiting rod extending plate 513 in a bending manner, the first limiting portion 515 and the rotation mounting portion 511 are respectively located at two ends of the first limiting rod extending plate 513, the first driving portion 510 includes a first driving portion connecting plate 5100 connected to the rotation mounting portion 511 in a bending manner and a first driving portion driving plate 5101 connected to the first driving portion connecting plate 5100 in a bending manner, the first driving portion connecting plate 5100 and the first driving portion driving plate 5101 are in an L-shaped or C-shaped configuration as a whole (it should be noted that the geometry of the first driving portion connecting plate 5100 and the first driving portion driving plate 5101 is only required to satisfy that the free end of the first driving portion driving plate 5101 faces the second mating plate 62), the first driving portion connecting plate 5100 and the first stopper extending plate 513 are bent toward the upper side and the lower side of the first stopper connecting plate 511, respectively, the first driving portion connecting plate 5100 is bent toward the traction rod 6, and the first driving portion connecting plate 5101 is directly in driving engagement with the second engaging plate 62. The first limiting rod extending plate 513 is the third bearing portion, and the first driving portion 510 is the second bearing portion.

As shown in fig. 12, a second embodiment in which the first driving part 510 of the trigger mechanism 51 directly drives the traction rod 6 is shown: the draw bar 6 is arranged on one side of the hot plugging prevention protection structure and comprises a draw bar spindle 60 and a third matching plate 63, wherein the draw bar spindle 60 is arranged in a rotating mode, the third matching plate 63 is arranged on the upper side of the draw bar 6, a first limiting portion 515 and a first driving portion 510 are both arranged on the upper side of the draw bar 6 and are both arranged between the third matching plate 63 and the side edge of a breaker shell, one end of a trigger structure 51 is rotatably installed on the first transmission structure 50, the middle portion of the trigger structure is provided with the first limiting portion 515, the other end of the trigger structure is provided with the first driving portion 510, when the first limiting portion 515 is limited in the breaker shell by a breaker installation position, the rocker arm assembly 2 drives the trigger structure 51 to rotate through the first transmission structure 50, and the first driving portion 510 drives the draw bar 6 to rotate anticlockwise through the third matching plate 63. Specifically, the trigger structure 51 includes a rotation mounting portion 511 rotationally connected to the first transmission structure 50 and a first limiting rod extending plate 513 bent and connected to the rotation mounting portion 511, the first limiting portion 515 is bent and connected to the first limiting rod extending plate 513, the first limiting portion 515 is parallel to the rotation mounting portion 511, the first driving portion 510 includes a first driving portion connecting plate 5100 and a first driving portion driving plate 5101 which are bent and connected, the first driving portion connecting plate 5100 is connected to the first limiting rod connecting plate 513 to form a first limiting rod main body plate, the first driving portion driving plate 5101 and the rotation mounting portion 511 are respectively located at two ends of the first limiting rod main body plate, and the first limiting portion 515 is located in the middle of the first limiting rod main body plate; the first drive portion drive plate 5101 is in direct driving engagement with the third engagement plate 63. The first limiting rod extending plate 513 and the first driving part 510 constitute the first bearing part.

Another improvement point of the present invention is that, as shown in fig. 1, 3, and 9-10, the circuit breaker further includes an anti-hot-plugging locking structure, the anti-hot-plugging locking structure includes a second transmission structure 10 and a limiting structure 11 movably connected to each other, the second transmission structure 10 is further in driving fit with the rocker arm assembly 2, and the limiting structure 11 includes a second limiting portion 111; when the breaker is switched on, the rocker arm assembly 2 drives the second transmission structure 10 and the limiting structure 11 to act, so that the second limiting part 111 protrudes out of the shell of the breaker and is used for being matched with the installation position of the breaker; when the breaker is opened, the second transmission structure 10 and the limiting structure 11 are reset, so that the second limiting part 111 moves into the breaker shell; when the circuit breaker is switched on in the process of inserting or pulling out the circuit breaker installation position, the second limiting part 111 is limited in the shell of the circuit breaker by the circuit breaker installation position, so that the second limiting part 111 is prevented from being in hard contact with the circuit breaker installation position, and the second limiting part 111 is extruded to deform or damaged to influence the locking function of the circuit breaker.

Specifically, when the circuit breaker is not installed in the circuit breaker installation position or is installed in the circuit breaker installation position and is installed in place: as shown in fig. 10, when the circuit breaker is switched on, the rocker arm assembly 2 drives the second transmission structure 10 and the limiting structure 11 to move, so that the second limiting portion 111 protrudes out of the circuit breaker housing and is used for being matched with a circuit breaker mounting position; as shown in fig. 9, when the circuit breaker is opened, the rocker arm assembly 2 drives the second transmission structure 10 and the limiting structure 11 to reset, so that the second limiting portion 111 moves into the circuit breaker housing.

Preferably, when the circuit breaker is opened, the rocker arm assembly 2 drives the second transmission structure 10 and the limiting structure 11 to reset. Of course, the second transmission structure 10 and the limiting structure 11 can also be reset under the driving of other structures, for example, the two are reset under the action of a reset spring or a reset spring sheet.

It should be noted that, in the circuit breaker, other parts of the operating mechanism (parts where position changes occur during closing and opening of the circuit breaker, such as a crank, a connecting rod, etc.) or the movable contact mechanism may also be used to drive the second transmission structure 10 and the limiting structure 11 to move or reset.

Preferably, as shown in fig. 1, 3, and 9-10, the second transmission structure 10 is slidably disposed on the circuit breaker housing, and the sliding direction of the second transmission structure 10 is perpendicular to the direction of inserting or removing the circuit breaker into or from the circuit breaker mounting position. Further, as shown in fig. 1, 3, 9-10, the second transmission structure 10 is slidably disposed on the mounting base 7.

Specifically, as shown in fig. 1, 3, and 9-10, the second transmission structure 10 is slidably disposed on the mounting base 7 from side to side, and the circuit breaker moves up and down to be pulled out of or inserted into the circuit breaker mounting location.

It should be noted that the action mode of the second transmission structure 10 is not limited to be set on the circuit breaker housing in a sliding manner, and the second transmission structure 10 may also be set in a rotating manner, as long as the whole limiting structure 11 can be driven to move towards the outside of the housing, so that the second limiting portion 111 protrudes out of the circuit breaker housing; of course, the second transmission structure 10 is slidably disposed for the purpose of simplifying the structure and saving space, which is a preferred implementation manner of the present application.

As shown in fig. 1, 3-4, and 9-13, the hot plug prevention locking structure further includes a second reset member 12, the second reset member 12 applies a reset force to the limiting structure 11, so that the limiting structure 11 and the second transmission structure 10 keep a limiting fit, and when the circuit breaker is in a closing state, the second limiting portion 111 keeps protruding outside the circuit breaker housing.

Specifically, as shown in fig. 9 to 10, when the circuit breaker is not installed in the circuit breaker installation position or is installed in the circuit breaker installation position and is installed in place: when the circuit breaker is in a closing state and an opening state, the second reset piece 12 applies a reset force to the limiting structure 11, so that the limiting structure 11 and the second transmission structure 10 are kept in limiting fit, and when the limiting structure and the second transmission structure move and reset, the limiting structure and the second transmission structure are kept relatively static; when the circuit breaker is in a closing state, the second reset piece 12 applies reset force to the limiting structure 11, so that the second limiting portion 111 is kept protruding outside the circuit breaker shell and is used for being in limiting fit with the circuit breaker installation position to prevent the circuit breaker from being pulled out of the circuit breaker installation position.

Preferably, as shown in fig. 1, 3-4, and 9-13, the second transmission structure 10 is rotatably connected to the limiting structure 11, the second reset element 12 is a torsion spring, and is sleeved on a rotating shaft of the limiting structure 11, and two ends of the second reset element are respectively matched with the second transmission structure 10 and the limiting structure 11. Of course, the second reset element 12 may also be another elastic element, such as an extension spring, a compression spring, a leaf spring, etc., as long as it can apply the necessary reset force to the limiting structure 11, so that the second limiting portion 111 can keep protruding outside the circuit breaker housing and keep the limiting structure 11 in limiting fit with the second transmission structure 10 without being pressed by external force (e.g., by the circuit breaker mounting location).

Preferably, as shown in fig. 1, 3, and 9-10, the second transmission structure 10 is rotatably connected to the limiting structure 11, the second transmission structure 10 includes a second transmission structure limiting portion 101, and the second reset member 12 applies a reset force to the limiting structure 11, so that the limiting structure 11 and the second transmission structure limiting portion 101 maintain a limiting fit; in the process that the breaker is inserted into or pulled out of the breaker mounting position, when the breaker is switched on, the second limiting part 111 is limited in the shell of the breaker by the breaker mounting position, and the rocker arm assembly 2 drives the limiting structure 11 to rotate relative to the second transmission structure 10 through the second transmission structure 10.

Specifically, in the process of inserting or pulling out the circuit breaker mounting position of the circuit breaker, when an operator mistakenly operates the rocker arm assembly 2 to close the circuit breaker, the rocker arm assembly 2 drives the limiting structure 11 to act through the second transmission structure 10, so that the second limiting part 111 has a tendency of moving towards the outside of the circuit breaker, and due to extrusion of the circuit breaker mounting position, the second limiting part 111 cannot extend out of the outside of the circuit breaker shell, so that the rocker arm assembly 2 drives the limiting structure 11 to rotate relative to the second transmission structure 10 through the second transmission structure 10, and hard contact between the second limiting part 111 and the circuit breaker mounting position is avoided.

It should be noted that, the second transmission structure 10 and the limiting structure 11 may also be connected in other manners, for example, a sliding fit manner may be adopted between the two, the limiting structure 11 is slidably disposed on the second transmission structure 10, and when the second limiting portion 111 is pressed by an external force, the limiting structure 11 slides on the second transmission structure 10, so that the second limiting portion 111 retracts into the inside of the circuit breaker housing. Or, the limiting structure 11 and the second transmission structure 10 may also be in lap joint, and the lap joint position of the two and the limiting matching position of the two are respectively located at two sides of the limiting structure 11.

Preferably, as shown in fig. 1, 3, and 9-12, the hot plug prevention protection structure and the hot plug prevention locking structure are respectively located at two ends of the swing direction of the rocker arm assembly 2, and both the hot plug prevention protection structure and the hot plug prevention locking structure are located at one side of the rocker arm assembly 2. Specifically, as shown in fig. 1, 3, and 9-12, the rocker arm assembly 2 swings left and right to drive the circuit breaker to switch on or switch off, the hot plug prevention protection structure is located at the right end of the swing direction of the rocker arm assembly 2, the hot plug prevention locking structure is located at the left end of the swing direction of the rocker arm assembly 2, and both the hot plug prevention protection structure and the hot plug prevention locking structure are located at the front side of the rocker arm assembly 2. According to the circuit breaker, the hot plug prevention protection structure and the hot plug prevention locking structure protect the circuit breaker from two directions, and the electricity utilization safety is further improved. When the circuit breaker is switched on in the embodiment, the rocker arm assembly 2 swings towards the hot plug prevention locking structure; when the circuit breaker is opened or tripped, the rocker arm component 2 swings towards the hot plugging prevention protection structure.

As shown in fig. 4-5, an embodiment of the hot plug locking structure is shown: the hot plug prevention locking structure comprises a second transmission structure 10 and a limiting structure 11 which are rotationally connected and slidably arranged on the shell of the circuit breaker, and a second reset piece 12; the second reset piece 12 applies a reset force to the limiting structure 11, so that the limiting structure 11 and the second transmission structure 10 keep limiting matching, and the second limiting part 111 of the limiting structure 11 still keeps protruding outside the shell of the circuit breaker when the circuit breaker is in a closing state. When the breaker is not installed in the breaker installation position or is installed in the breaker installation position and is installed in place: as shown in fig. 10, the rocker arm assembly 2 swings to close the circuit breaker, and simultaneously drives the second transmission structure 10 and the limiting structure 11 to synchronously slide towards the outside of the circuit breaker housing (as shown in fig. 10, the second transmission structure 10 and the limiting structure 11 preferably synchronously slide towards the left side), and the second limiting portion 111 protrudes out of the circuit breaker housing and is used for limiting and matching with the circuit breaker mounting position to prevent the circuit breaker from being pulled out of the circuit breaker mounting position; as shown in fig. 9, the swing arm assembly 2 swings to open the circuit breaker, and at the same time, drives the second transmission structure 10 and the limiting structure 11 to slide towards the inside of the circuit breaker housing (as shown in fig. 9, the second transmission structure 10 and the limiting structure 11 preferably slide towards the right side synchronously), and the second limiting portion 111 moves into the circuit breaker housing. Further, as shown in fig. 1, 3-5, and 11-13, the second transmission structure 10 is a second push rod, and includes a second push rod stress plate 104, a second push rod transmission plate 103, and a second push rod connection plate 100, which are connected in sequence, the second push rod stress plate 104 is in driving fit with the rocker arm assembly 2, the second push rod transmission plate 103 is slidably disposed on the mounting base 7 of the circuit breaker housing, and the mounting base 7 is provided with a second sliding groove in cooperation with the second push rod transmission plate 103; the limiting structure 11 is rotatably mounted on the second push rod connecting plate 100, a second transmission structure limiting part 101 is arranged on the second push rod connecting plate 100, and the second reset piece 12 applies reset force to the limiting structure 11 to enable the limiting structure 11 and the second transmission structure limiting part to be in limiting fit 101.

As shown in fig. 4 and 5, the second transmission structure limiting portion 101 is a second push rod limiting plate disposed on the second push rod connecting plate 100 and connected to the second push rod connecting plate in a bending manner. Further, as shown in fig. 4 and 5, one end of the second push rod connecting plate 100 is connected with one end of the second push rod driving plate 103 in a bending manner, the plane where the second push rod connecting plate 100 is located is perpendicular to the plane where the second push rod driving plate 103 is located, the other end of the second push rod connecting plate 100 is provided with a second push rod limiting plate, the plane where the second push rod limiting plate is located is parallel to the plane where the second push rod driving plate 103 is located, and a side edge of the other end of the second push rod driving plate 103 protrudes and extends to form the second push rod stress plate 104 for being in driving fit with the rocker arm assembly 2.

As shown in fig. 5, the limiting structure 11 is a second limiting rod, the second limiting rod includes a second limiting rod connecting plate 110 and a second limiting portion 111, one end of the second limiting rod connecting plate 110 is rotatably connected to the second push rod connecting plate 100 through a second pin shaft 10-11, the other end is connected to the second limiting portion 111, the second reset member 12 is a torsion spring, and is sleeved on the second pin shaft 10-1, and both ends of the second reset member are respectively matched with the second transmission structure 10 and the limiting structure 11; the second push rod connecting plate 100 is provided with a first push rod shaft hole 102 matched with the second pin shaft 10-11, and the second limiting rod connecting plate 110 is provided with a second limiting rod shaft hole 112 matched with the second pin shaft 10-11. Further, as shown in fig. 5, the second limiting rod connecting plate 110 is provided with a second limiting rod spring groove 113, one end of the second restoring member 12 is in limiting fit with the second push rod transmission plate 103, and the other end is located in the second limiting rod spring groove 113.

As shown in fig. 1, 3, 4, and 9-12, the circuit breaker of the present invention realizes the driving cooperation of the rocker arm assembly 2 with the hot plug prevention protection structure and the hot plug prevention locking structure in the following manner: the circuit breaker further comprises a rotating rod assembly 3, wherein the rotating rod assembly 3 comprises a rotating rod 30 and a rotating rod rotating shaft 30-7, and the rotating rod 30 is pivoted through the rotating rod rotating shaft 30-7; the rocker arm assembly 2 is in driving fit with the rotating rod 30 to drive the rotating rod 30 to rotate, and two ends of the rotating rod 30 are respectively in driving connection with the first transmission structure 50 and the second transmission structure 10. Further, the rotating rod 30 is rotatably disposed on the mounting base 7 through the rotating rod rotating shaft 30-7, or alternatively, a fixing plate fixed on the mounting base 7 may be further provided, and the rotating rod 30 is rotatably disposed on the fixing plate through the rotating rod rotating shaft 30-7.

As shown in fig. 1, 3, 4, and 9-12, the first transmission structure 50 is a first push rod, the second transmission structure 10 is a second push rod, two ends of the rotating rod 30 are respectively provided with a first rotating rod driving shaft 30-50 and a second rotating rod driving shaft 10-30, the first push rod is provided with a first kidney-shaped hole 501, the first rotating rod driving shaft 30-50 is inserted into the first kidney-shaped hole 501, the second push rod is provided with a second kidney-shaped hole 105, the second rotating rod driving shaft 10-30 is inserted into the second kidney-shaped hole 105, and the rotating rod 30 rotates to drive the first push rod and the second push rod to linearly slide. Specifically, as shown in fig. 6, the first kidney-shaped hole 501 is disposed on the first push rod driven plate 500 of the first transmission structure 50; as shown in fig. 5, the second kidney-shaped hole 105 is provided in the first push rod receiving plate 104 of the first transmission mechanism 10.

As shown in fig. 1, 3, and 9-12, the rotating lever assembly 3 further includes a rotating lever reset element 8, the rocker arm assembly 2 drives the circuit breaker to close, and simultaneously overcomes the resistance of the rotating lever reset element 8 to drive the rotating lever 30 to rotate in a first direction, the rocker arm assembly 2 drives the circuit breaker to open, and simultaneously the rotating lever reset element 8 drives the rotating lever 30 to rotate in a second direction, the first direction and the second direction are opposite to each other. Further, the rotating rod reset member 8 is a tension spring, one end of which is connected to the rotating rod 30, and the other end of which is connected to the mounting base 7 of the circuit breaker housing. Specifically, as shown in fig. 1, 3, and 9-12, the first direction is counterclockwise, the second direction is clockwise, when the rocker arm assembly 2 drives the circuit breaker to close, the rocker arm assembly 2 drives the rotating rod 30 to rotate in the first direction, and meanwhile, the rotating rod resetting piece 8 is stretched to store energy, and when the rocker arm assembly 2 drives the circuit breaker to open, the rotating rod resetting piece 8 contracts to release energy and drives the rotating rod 30 to rotate in the second direction.

As shown in fig. 7, an embodiment of the rotating lever 30: the rotary rod 30 comprises a rotary rod main body 300 and a rotary rod spring mounting part 304, the middle part of the rotary rod main body 300 is provided with a rotary rod shaft hole 301 matched with a rotary rod rotating shaft 30-7, two sides of the rotary rod shaft hole 301 are respectively provided with a first rotary rod driving shaft hole 303 matched with a first rotary rod driving shaft 30-50 and a second rotary rod driving shaft hole 302 matched with a second rotary rod driving shaft 10-30, the rotary rod spring mounting part 304 is connected with one side edge of the rotary rod main body 300 and is provided with a spring hanging groove 305 matched with a rotary rod reset piece 8, and the rotary rod spring mounting part 304 and the second rotary rod driving hole 302 are positioned at the same end of the rotary rod main body 300.

Preferably, as shown in fig. 1, 3-4 and 7, the rocker arm assembly 2 includes a rocker arm 20 rotatably disposed and a rocker arm driver 21 disposed on the rocker arm 20 and acting synchronously therewith, the rocker arm driver 21 includes a driver driving portion 202 protruding from the outer side of the rocker arm 20, and the rocker arm 20 drives the rotation rod 30 to rotate through the driver driving portion 202 of the rocker arm driver 21. Preferably, the rocker arm driving element 21 of the present embodiment includes a driving element connecting portion 200 fixedly connected to the rocker arm 20, a driving element engaging portion 201 connected to the driving element connecting portion 200 in a bent manner, and a driving element driving portion 202 disposed on the driving element engaging portion 201 and protruding toward the rotating rod 30 and in driving engagement with the rotating rod, wherein the driving element driving portion 202 abuts against the rotating rod 30. Of course, the rocker arm driver 21 may also be a drive shaft fixed to the rocker arm 20 and acting synchronously therewith, which drive shaft abuts against the rotary rod 30; alternatively, the rocker arm 21 and the rotating rod 30 can also realize transmission in a hole-shaft matching manner; that is, the shape of the rocker arm driving element 21 can be various shapes, and the transmission manner between the rocker arm 20 and the rotating rod 30 can be changed, as long as the function of the rocker arm 20 driving the rotating rod 30 to rotate can be realized.

It should be noted that the implementation manner of the driving engagement of the first transmission structure 50 and/or the second transmission structure 10 with the rocker arm assembly 2 is not limited to the above-mentioned one, and the first transmission structure 50 and/or the second transmission structure 10 may also be directly in driving engagement with the rocker arm assembly 2.

It should be pointed out, circuit breaker installation position indicates block terminal, switch board isotructure that is used for installing and fixed circuit breaker, be equipped with on block terminal or the switch board with first spacing portion 515 and the spacing portion 111 complex spacing groove of second or pore structure, when circuit breaker inserts circuit breaker installation position and installs the time of targetting in place, the circuit breaker is closed a floodgate the back, the cooperation in corresponding groove or the hole of the spacing portion 111 accessible circuit breaker installation position of first spacing portion 515 and second, the protrusion is outside with the circuit breaker casing.

It should be pointed out that the operating mechanism further comprises a mechanism support, a tripping element, a locking element, a re-locking element, a crank element, a connecting rod and a main tension spring, wherein the rocker arm assembly 2, the tripping element, the locking element and the re-locking element are respectively and rotatably arranged on the mechanism support, the tripping element is in locking fit with the locking element, the locking element is in limit fit with the re-locking element, the re-locking element is in driving fit with the traction rod 6 (the traction rod 6 rotates from the initial position of the traction rod to the action position of the traction rod, and simultaneously the re-locking element is driven to rotate so as to remove the limit fit with the locking element, so that the operating mechanism is tripped), the crank element is rotatably connected with the tripping element, one end of the connecting rod is rotatably connected with the crank element, the other end of the connecting rod is connected with a moving contact mechanism of the circuit breaker, one end of the main tension spring is connected with the rocker arm assembly 2, and the other end of the main tension spring is connected with the crank element; the operation process and the working principle of the operating mechanism are disclosed in the prior art and are not described herein.

It should be noted that, the circuit breaker of this embodiment may further include a short-circuit protection mechanism and an overload protection mechanism that are respectively in driving fit with the traction rod 6, and when an overcurrent or short-circuit fault occurs, the short-circuit protection mechanism or the overload protection mechanism drives the traction rod 6 to rotate, so that the operating mechanism is tripped. Further, the circuit breaker of the present embodiment may be a multi-pole circuit breaker, and each pole of the circuit breaker is provided with an independent short circuit protection mechanism and an independent overload protection mechanism.

The circuit breaker is plug-in circuit breaker, and the circuit breaker includes binding post, and binding post includes inlet wire binding post and the binding post of being qualified for the next round of competitions, and inlet wire binding post and the binding post of being qualified for the next round of competitions all are located same one end of circuit breaker casing, binding post and operating device set up respectively at the relative both ends of circuit breaker casing.

The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.

Claims

1. A circuit breaker comprises a circuit breaker shell, an operating mechanism and a draw bar (6), wherein the operating mechanism and the draw bar are arranged in the circuit breaker shell; the operating mechanism comprises a rocker arm component (2), and the rocker arm component (2) swings to drive the breaker to switch on or switch off; the draw bar (6) is rotationally arranged and is in driving fit with the operating mechanism, and the draw bar (6) is driven to rotate so as to trigger the operating mechanism to trip;

the method is characterized in that: the circuit breaker further comprises an anti-hot-plugging protection structure, the anti-hot-plugging protection structure comprises a first transmission structure (50) and a trigger structure (51) which are movably connected, the trigger structure (51) comprises a first limiting part (515) and a first driving part (510) in driving fit with the traction rod (6), and the first limiting part (515) can move between the inner side and the outer side of the circuit breaker shell;

when the circuit breaker is switched on, the rocker arm assembly (2) drives the first transmission structure (50) and the trigger structure (51) to act, so that the first limiting part (515) protrudes out of the shell of the circuit breaker and is used for limiting and matching with the installation position of the circuit breaker; when the circuit breaker is opened, the first transmission structure (50) and the trigger structure (51) reset, so that the first limiting part (515) moves into the shell of the circuit breaker; when the breaker is switched on in the process of inserting or pulling the breaker mounting position, the first limiting part (515) is limited in the shell of the breaker by the breaker mounting position, and the rocker arm assembly (2) drives the first driving part (510) to move through the first transmission structure (50) so as to drive the traction rod (6) to rotate, so that the operating mechanism is tripped.

2. The circuit breaker of claim 1, wherein: the hot-plugging and unplugging prevention protection structure further comprises a first reset piece (52), wherein the first reset piece (52) applies reset force to the trigger structure (51), so that the trigger structure (51) and the first transmission structure (50) are in limit fit, and when the circuit breaker is in a closing state, the first limit part (515) is kept protruding out of the shell of the circuit breaker.

3. The circuit breaker of claim 2, wherein: the first reset piece (52) is a torsion spring, a leaf spring, a compression spring or an extension spring.

4. The circuit breaker of claim 1, wherein: the first transmission structure (50) is arranged on the breaker shell in a sliding mode, and the sliding direction of the first transmission structure (50) is perpendicular to the direction of inserting or pulling out the breaker installation position.

5. The circuit breaker of claim 2, wherein: the first transmission structure (50) is rotationally connected with the trigger structure (51), the first transmission structure (50) further comprises a first transmission structure limiting part (506), and the first reset piece (52) applies reset force to the trigger structure (51) to enable the trigger structure to be in limiting fit with the first transmission structure limiting part (506);

when the breaker is switched on in the process of inserting or pulling the breaker mounting position, the first limiting part (515) is limited in the shell of the breaker by the breaker mounting position, the rocker arm assembly (2) drives the trigger structure (51) to rotate relative to the first transmission structure (50) through the first transmission structure (50), and the trigger structure (51) simultaneously drives the first driving part (510) to move so as to drive the traction rod (6) to rotate, so that the operating mechanism is tripped.

6. The circuit breaker of claim 5, wherein: the trigger structure (51) comprises a rotating installation part (511) and a first bearing part, the first bearing part is arranged above the traction rod (6) and extends in the direction parallel to the traction rod (6), the trigger structure (51) is rotatably connected with the first transmission structure (50) through the rotating installation part (511), the first bearing part is connected with the rotating installation part (511), the first driving part (510) and the first limiting part (515) are arranged on the first bearing part, and the first bearing part is in limit fit with the first transmission structure limiting part (506);

or, trigger structure (51) are including the second bearing part, rotate installation department and the third bearing part that link to each other in proper order, trigger structure (51) rotate with first drive structure (50) through rotating installation department (511) and link to each other, second bearing part and traction lever (6) drive fit, first drive division (510) set up on the second bearing part, the third bearing part is established in traction lever (6) top and is extended along the direction that is on a parallel with traction lever (6), first spacing portion (515) set up on the third bearing part, the third bearing part and the spacing cooperation of first drive structure spacing portion (506).

7. The circuit breaker according to any one of claims 1-6, wherein: the circuit breaker further comprises an anti-hot-plugging locking structure, the anti-hot-plugging locking structure comprises a second transmission structure (10) and a limiting structure (11) which are movably connected, the second transmission structure (10) is in driving fit with the rocker arm assembly (2), and the limiting structure (11) comprises a second limiting part (111); when the circuit breaker is switched on, the rocker arm assembly (2) drives the second transmission structure (10) and the limiting structure (11) to act, so that the second limiting part (111) protrudes out of the shell of the circuit breaker and is used for limiting and matching with the installation position of the circuit breaker; when the breaker is opened, the second transmission structure (10) and the limiting structure (11) reset, so that the second limiting part (111) moves into the shell of the breaker; when the breaker is switched on in the process of inserting or pulling the breaker mounting position, the second limiting part (111) is limited in the shell of the breaker by the breaker mounting position.

8. The circuit breaker of claim 7, wherein: the hot-plugging preventing locking structure further comprises a second reset piece (12), wherein the second reset piece (12) applies reset force to the limiting structure (11), so that the limiting structure (11) and the second transmission structure (10) are in limiting fit, and when the circuit breaker is in a closing state, the second limiting part (111) is kept protruding out of the shell of the circuit breaker.

9. The circuit breaker of claim 7, wherein: the second transmission structure (10) is arranged on the shell of the circuit breaker in a sliding mode, and the sliding direction of the second transmission structure (10) is perpendicular to the direction of the circuit breaker inserted into or pulled out of the installation position of the circuit breaker.

10. The circuit breaker of claim 8, wherein: the second transmission structure (10) is rotatably connected with the limiting structure (11), the second transmission structure (10) comprises a second transmission structure limiting part (101), and the second reset piece (12) applies reset force to the limiting structure (11) to enable the limiting structure (11) and the second transmission structure limiting part (101) to be in limiting fit; in the process that the breaker is inserted into or pulled out of the breaker mounting position, when the breaker is switched on, the second limiting part (111) is limited in the shell of the breaker by the breaker mounting position, and the rocker arm assembly (2) drives the limiting structure (11) to rotate relative to the second transmission structure (10) through the second transmission structure (10).

11. The circuit breaker of claim 7, wherein: the hot plug prevention protection structure and the hot plug prevention locking structure are respectively located at two ends of the swing direction of the rocker arm assembly (2), and the hot plug prevention protection structure and the hot plug prevention locking structure are both located on one side of the rocker arm assembly (2).

12. The circuit breaker of claim 7, wherein: the circuit breaker further comprises a rotating rod assembly (3), wherein the rotating rod assembly (3) comprises a rotating rod (30) and a rotating rod rotating shaft (30-7), and the rotating rod (30) is pivoted through the rotating rod rotating shaft (30-7); the rocker arm assembly (2) is in driving fit with the rotating rod (30) to drive the rotating rod (30) to rotate, and two ends of the rotating rod (30) are respectively in driving connection with the first transmission structure (50) and the second transmission structure (10).

13. The circuit breaker of claim 12, wherein: the rotating rod assembly (3) further comprises a rotating rod reset piece (8), the rocker arm assembly (2) drives the breaker to be switched on, a resistance driving rotating rod (30) overcoming the rotating rod reset piece (8) simultaneously rotates towards the first direction, the rocker arm assembly (2) drives the breaker to be switched off, the rotating rod reset piece (8) drives the rotating rod (30) to rotate towards the second direction, and the first direction and the second direction are opposite.

14. The circuit breaker according to claim 12 or 13, characterized in that: the first transmission structure (50) is a first push rod, the second transmission structure (10) is a second push rod, a first rotary rod driving shaft (30-50) and a second rotary rod driving shaft (10-30) are respectively arranged at two ends of the rotary rod (30), the first push rod is provided with a first waist-shaped hole (501), the first rotary rod driving shaft (30-50) is inserted into the first waist-shaped hole (501), the second push rod is provided with a second waist-shaped hole (105), the second rotary rod driving shaft (10-30) is inserted into the second waist-shaped hole (105), the rotary rod (30) rotates, and the first push rod and the second push rod are driven to slide linearly at the same time.

15. The circuit breaker of claim 14, wherein: the first push rod further comprises a first push rod sliding plate (502), a first push rod driven plate (500) and a first push rod connecting plate (505), the first push rod driven plate (500) and the first push rod connecting plate are respectively connected with two ends of the first push rod sliding plate (502), a first waist-shaped hole (501) is formed in the first push rod driven plate (500), the first push rod sliding plate (502) is arranged on a shell of the circuit breaker in a sliding mode, the triggering structure is installed on the first push rod connecting plate (505) in a rotating mode, and a first transmission structure limiting portion (506) is arranged on the first push rod connecting plate (505).

16. The circuit breaker of claim 14, wherein: the second push rod further comprises a second push rod stress plate (104), a second push rod transmission plate (103) and a second push rod connecting plate (100) which are sequentially connected, the second push rod stress plate (104) is connected with the rotary rod (30) in a driving mode, the second push rod transmission plate (103) is arranged on the shell of the circuit breaker in a sliding mode, the limiting structure (11) is installed on the second push rod connecting plate (100) in a rotating mode, and the limiting portion (101) of the second transmission structure is arranged on the second push rod connecting plate (100).

17. The circuit breaker according to any one of claims 1-6, wherein: the first limiting part (515) directly or indirectly drives the traction rod (6) to rotate, so that the operating mechanism is tripped.

18. The circuit breaker according to any one of claims 1-6, wherein: the circuit breaker further comprises a magnetic flux assembly or a tripping mechanism (4), when the circuit breaker is in a closing state, the first limiting part (515) is squeezed to enable the first driving part (510) to drive the magnetic flux assembly or the tripping mechanism (4) to act, and the magnetic flux assembly or the tripping mechanism (4) drives the traction rod (6) to rotate to enable the operating mechanism to trip.

19. The circuit breaker of claim 18, wherein: the magnetic flux assembly comprises an assembly support (41), and a third push rod (42) and a drag hook (43) which are arranged on the assembly support (41), the drag rod (6) comprises a first matching plate (61), and the third push rod (42) comprises a push rod clamping hook (420) which is in driving matching with the first matching plate (61); the first limiting part (515) is extruded, the first driving part (510) drives the draw hook (43) to release the limitation on the third push rod (42), the third push rod (42) acts and drives the draw bar (6) to rotate through the push rod clamping hook (420) and the first matching plate (61), and the operating mechanism is released.

20. The circuit breaker of claim 19, wherein: the magnetic flux assembly comprises a third push rod driving piece (44), the third push rod driving piece (44) applies driving force to a third push rod (42) to enable the third push rod (42) to rotate, and the traction rod (6) is driven to rotate through a push rod clamping hook (420) and a first matching plate (61).

21. The circuit breaker of claim 1, wherein: the operating mechanism further comprises a mechanism support, a jump fastener, a lock catch piece, a re-fastener, a crank piece, a connecting rod and a main tension spring, the rocker arm component (2), the jump fastener, the lock catch piece and the re-fastener are respectively and rotatably arranged on the mechanism support, the jump fastener is matched with the lock catch piece in a lock catch way, the lock catch piece is in limit matching with the re-fastener, the re-fastener is in drive matching with a traction rod (6), the crank piece is rotatably connected with the jump fastener, one end of the connecting rod is rotatably connected with the crank piece, the other end of the connecting rod is connected with a moving contact mechanism of the circuit breaker, one end of the main tension spring is connected with the rocker arm component (2), and the other end of the main tension spring is connected with the crank piece;