CN115565829A

CN115565829A - Drive structure and have its circuit breaker

Info

Publication number: CN115565829A
Application number: CN202211096734.5A
Authority: CN
Inventors: 古王荣; 孙荣春; 裴军; 郝延梅; 徐然; 王丽; 王颖博
Original assignee: Chint Electric Co Ltd
Current assignee: Chint Electric Co Ltd
Priority date: 2022-09-08
Filing date: 2022-09-08
Publication date: 2023-01-03
Anticipated expiration: 2042-09-08
Also published as: CN115565829B

Abstract

The invention provides a driving structure and a circuit breaker with the same, wherein the driving structure is used for driving a plurality of moving contact assemblies of the circuit breaker to move; the driving structure includes: the connecting plates are all arranged in the guide channel and are used for being connected with the moving contact assemblies in a one-to-one correspondence manner; the crank arm assembly is at least partially arranged in the guide channel and is respectively hinged with the connecting plates, and the crank arm assembly can be rotatably arranged around the central axis of the crank arm assembly; the connecting plates are arranged along the extending direction of the central axis, so that when the crank arm assembly rotates around the central axis continuously along a preset direction, each connecting plate is driven to move synchronously, and each moving contact assembly is switched alternately between a switching-on position and a switching-off position. The invention solves the problem that the driving structure of the breaker for driving the moving contact component to move in the prior art is complex.

Description

Driving structure and circuit breaker with same

Technical Field

The invention relates to the field of switching devices, in particular to a driving structure and a circuit breaker with the same.

Background

The vacuum circuit breaker is named because the arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum, has the advantages of small volume, light weight, suitability for frequent operation and no need of maintenance for arc extinguishing, and is popularized to application in a power distribution network. When the vacuum circuit breaker is used, electric arcs are easily generated when a moving contact and a fixed contact of the vacuum circuit breaker are close to each other, so that the switching-on and switching-off speed of the vacuum circuit breaker is required to be as fast as possible, and the vacuum circuit breaker is generally required to be disconnected within 20ms of a fluctuation period, so that the generation of the electric arcs is reduced, and the damage to equipment is reduced.

Most of high-voltage circuit breakers on the market are suitable for 36KV or 72KV, 110KV already belongs to the category of ultrahigh voltage, but the circuit breaker suitable for 363KV mostly adopts a double-fracture mode, the ultrahigh voltage has severe requirements on the breaking speed and the synchronization degree, and the common breaking speed and synchronization are difficult to meet the requirements.

For example, an existing double-break circuit breaker, in which a vacuum arc-extinguishing chamber is used as a breaking element to form a series fracture, and an arc extinguishing circuit is used to control the arcing time of the fracture, is capable of achieving rapid and reliable breaking. The two arc extinguish chambers of the structure are disconnected first and then, so that the contact is inevitably and rapidly damaged when the structure is applied to an ultrahigh voltage environment. Therefore, it is a technical problem to achieve rapid and synchronous arc extinction in a very short time under ultra-high voltage conditions.

At present, a double-break isolating switch of a high-voltage combined electrical appliance adopts a gear and rack structure to realize transmission of two groups of moving contact assemblies, and realizes reciprocating movement of the moving contact assemblies by enabling a gear to perform multi-circle reciprocating motion, so that the transmission structure is complex and the cost is high; and the isolation grounding switch adopts two sets of motor structures, so that the whole driving structure is more complicated.

Disclosure of Invention

The invention mainly aims to provide a driving structure and a circuit breaker with the same, and aims to solve the problem that the driving structure for driving a moving contact assembly to move of the circuit breaker in the prior art is complex.

In order to achieve the above object, according to one aspect of the present invention, there is provided a driving structure for driving a plurality of movable contact assemblies of a circuit breaker to move, the circuit breaker having a conductor member provided therein, the conductor member having a guide passage receiving the movable contact assemblies, the driving structure comprising: the connecting plates are all arranged in the guide channel and are used for being connected with the moving contact assemblies in a one-to-one correspondence manner; the crank arm assembly is at least partially arranged in the guide channel and is respectively hinged with the connecting plates, and the crank arm assembly can be rotatably arranged around the central axis of the crank arm assembly; the connecting plates are arranged along the extending direction of the central axis, so that when the crank arm assembly rotates around the central axis continuously along a preset direction, each connecting plate is driven to move synchronously, and each moving contact assembly is switched alternately between a switching-on position and a switching-off position.

Further, the crank arm assembly comprises: the central shaft penetrates through the conductor part, and the axis of the central shaft is the central axis; the crank arm assembly is hinged with the connecting plates through the hinge column assembly; the transition plate assembly is arranged between the central shaft and the hinge column assembly and is fixedly connected with the central shaft and the hinge column assembly.

Further, the center pin includes first shaft section and second shaft section, and the axis of first shaft section and the axis of second shaft section all coincide with the central axis, and first shaft section and second shaft section set up the both sides at the transition board subassembly respectively.

Furthermore, the plurality of connecting plates comprise a first connecting plate and a second connecting plate, the hinge column assembly comprises a first hinge column and a second hinge column, the first connecting plate is hinged with the first hinge column, and the second connecting plate is hinged with the second hinge column; the transition plate assembly comprises a first transition plate, a second transition plate and a third transition plate which are sequentially arranged, two ends of the first hinged column are respectively connected with the first transition plate and the second transition plate, and two ends of the second hinged column are respectively connected with the second transition plate and the third transition plate.

Furthermore, the moving direction of the first connecting plate is parallel to the moving direction of the second connecting plate, and the first hinge column and the second hinge column are located on two opposite sides of the central shaft.

Furthermore, a preset included angle is formed between the moving direction of the first connecting plate and the moving direction of the second connecting plate; the distance direction between the axis of first articulated post and the central axis is first distance direction, and the distance direction between the axis of second articulated post and the central axis is the second distance direction, is predetermined contained angle setting between first distance direction and the second distance direction.

Furthermore, the plurality of connecting plates comprise a first connecting plate and a second connecting plate, and the moving direction of the first connecting plate is parallel to the moving direction of the second connecting plate; the hinge column assembly comprises a third hinge column, and the first connecting plate and the second connecting plate are both hinged with the third hinge column; the transition plate assembly comprises a fourth transition plate and a fifth transition plate, and two ends of the third hinge column are respectively connected with the fourth transition plate and the fifth transition plate.

Further, the driving structure further includes: a drive assembly including a drive member having a rotatably disposed drive shaft; the driving shaft is connected with the driving rod assembly so as to drive the driving rod assembly to rotate, and the driving rod assembly is connected with the crank arm assembly; to drive the crank arm assembly to rotate around the central axis thereof; the transmission rod assembly comprises an insulating rod, and the insulating rod is connected with the crank arm assembly; sealing rod and cover establish the seal assembly on the sealing rod, and the sealing rod is connected with the insulator spindle, and seal assembly installs on the casing of circuit breaker.

Further, the driving structure further includes: the limiting assembly comprises a first limiting part and a second limiting part which are mutually limited and matched, the first limiting part is connected with the driving shaft, so that the first limiting part moves relative to the second limiting part under the driving of the driving shaft, and the driving shaft stops rotating when the second limiting part performs limiting action on the first limiting part.

Furthermore, a movable groove is formed in the first limiting part, and a movable pin movably arranged along the extending direction of the movable groove is arranged in the movable groove; the second limiting component is provided with an annular groove and a limiting groove communicated with the annular groove, the annular groove extends along the circumferential direction of the second limiting component, and the movable groove and the limiting groove both extend along the radial direction of the annular groove; a portion of the movable pin is positioned in the annular groove to slide along the annular groove; the limiting assembly further comprises an elastic component, the elastic component is connected with the movable pin, and when the movable pin moves to the position, opposite to the limiting groove, of the annular groove, the movable pin moves to the limiting groove under the action of the elastic component.

According to another aspect of the present invention, there is provided a circuit breaker including a conductor member and a plurality of movable contact assemblies each movably disposed within a cavity of the conductor member, the circuit breaker further including: in the driving structure, the driving structure is connected with the plurality of moving contact assemblies so as to drive the plurality of moving contact assemblies to synchronously move to respective opening positions or closing positions.

By applying the technical scheme, the driving structure comprises a plurality of connecting plates and crank arm assemblies, wherein the connecting plates are arranged in guide channels of conductor parts of the circuit breaker and are used for being connected with the moving contact assemblies in a one-to-one correspondence manner; at least part of the crank arm assembly is arranged in the guide channel and is respectively hinged with the connecting plates, and the crank arm assembly is rotatably arranged around the central axis of the crank arm assembly; wherein, a plurality of even boards are arranged along the extending direction of the central axis, in order when connecting lever subassembly winds the central axis and rotates in succession along predetermined direction, drive each even board synchronous motion, in order to make each moving contact subassembly switch in turn between closing position and separating brake position, compare with the transmission of rack and pinion among the prior art, this application can drive a plurality of even board synchronous motion through the rotation of connecting lever subassembly, the moving contact subassembly of circuit breaker is when separating brake and closing brake, turned angle is less, and do not need the switching-over device, the transmission simple structure, it is reliable, the problem that the drive structure that is used for driving the moving contact subassembly of circuit breaker among the prior art to remove is comparatively complicated has been solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

figure 1 shows a schematic overall structure from a first perspective of a first embodiment of a circuit breaker according to the present invention;

figure 2 shows a schematic overall structure of a second point of view of a first embodiment of the circuit breaker according to the invention;

figure 3 shows a schematic structural view of a crank arm assembly of the circuit breaker according to figure 2;

figure 4 shows a schematic view of a second limiting member with a movable pin structure of an embodiment of the circuit breaker according to the invention;

figure 5 shows a schematic structural diagram of a spacing assembly of an embodiment of a circuit breaker according to the present invention;

figure 6 shows a schematic structural view of a first limiting member of an embodiment of the circuit breaker according to the invention;

fig. 7 is a schematic view illustrating a structure of a second spacing member without a movable pin according to an embodiment of the circuit breaker of the present invention;

fig. 8 is a schematic structural view illustrating a movable pin of an embodiment of a circuit breaker according to the present invention is positioned in a stopping groove of a second stopping member;

figure 9 illustrates a schematic view of a reset button moving a moveable pin from a limit slot into an annular slot in accordance with an embodiment of a circuit breaker according to the present invention;

fig. 10 is a schematic structural view illustrating the movable and stationary contact assemblies of the first embodiment of the circuit breaker according to the present invention in the switching-on position;

figure 11 shows a schematic structural view of the second limit stop of the circuit breaker according to figure 10 cooperating with the movable pin;

fig. 12 is a schematic structural view illustrating the moving contact assembly and the fixed contact assembly of the first embodiment of the circuit breaker according to the present invention in an open position;

fig. 13 is a view illustrating a structure in which a movable pin of the circuit breaker according to fig. 12 is escaped from a stopper groove of a second stopper member;

figure 14 is a schematic structural view illustrating the moving and stationary contact assemblies in a fully opened position for the first embodiment of the circuit breaker according to the present invention;

figure 15 shows a schematic structural view of a spacing assembly of the circuit breaker according to figure 14;

figure 16 illustrates a schematic structural view of the moving contact assembly and the fixed contact assembly of the first embodiment of the circuit breaker moving from the fully opened position to the closed position according to the present invention;

figure 17 shows a schematic structural view of a spacing assembly of the circuit breaker according to figure 16;

figure 18 shows a schematic structural view of a second embodiment of the circuit breaker according to the invention;

figure 19 shows a schematic structural view of a third embodiment of the circuit breaker according to the invention;

fig. 20 is a schematic view illustrating a structure of a crank arm assembly in the circuit breaker according to fig. 19.

Wherein the figures include the following reference numerals:

1. a circuit breaker; 101. a housing; 2. a moving contact assembly; 201. breaking off; 202. a spring contact finger; 203. a guide sleeve; 204. a mounting base; 3. a stationary contact assembly; 301. a first insulating member; 302. a second insulating member; 303. a stationary contact base; 110. avoiding the opening; 10. a conductor member; 100. a guide channel; 20. connecting plates; 21. a first link plate; 22. a second connecting plate; 30. a crank arm assembly; 31. a central shaft; 311. a first shaft section; 312. a second shaft section; 32. a hinge post assembly; 320. a hinged column; 321. a first hinge post; 322. a second hinge post; 323. a third hinge post; 33. a transition plate assembly; 330. a transition plate; 331. a hinge gap; 332. a first transition plate; 333. a second transition plate; 334. a third transition plate; 335. a fourth transition plate; 336. a fifth transition plate; 40. a drive assembly; 41. a drive member; 410. a drive shaft; 42. a drive rod assembly; 420. an insulating rod; 421. a sealing rod; 43. a seal assembly; 50. a limiting component; 51. a first limit member; 52. a second limiting component; 510. a movable groove; 511. a movable pin; 520. an annular groove; 521. a limiting groove; 53. an elastic member; 54. a reset button.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 to 20, the present invention provides a driving structure for driving a plurality of movable contact assemblies 2 of a circuit breaker 1 to move, a conductor member 10 is provided in the circuit breaker 1, the conductor member 10 has a guide passage 100 for receiving the movable contact assemblies 2, the driving structure includes: the connecting plates 20 are all arranged in the guide channel 100 and are used for being connected with the moving contact assemblies 2 in a one-to-one correspondence manner; the crank arm assembly 30, at least part of the crank arm assembly 30 is set in the guide channel 100 and is hinged with the plurality of connecting plates 20 respectively, the crank arm assembly 30 is set rotatably around the central axis; the plurality of connecting plates 20 are arranged along the extending direction of the central axis, so that when the crank arm assembly 30 rotates around the central axis continuously along a predetermined direction, each connecting plate 20 is driven to move synchronously, and each movable contact assembly 2 is switched between a switching-on position and a switching-off position alternately.

The driving structure of the invention comprises a plurality of connecting plates 20 and a crank arm assembly 30, wherein the connecting plates 20 are all arranged in a guide channel 100 of a conductor part of the circuit breaker and are used for being connected with a plurality of moving contact assemblies 2 in a one-to-one correspondence manner; at least part of the crank arm assembly 30 is arranged in the guide channel 100 and is respectively hinged with the plurality of connecting plates 20, and the crank arm assembly 30 is rotatably arranged around the central axis thereof; wherein, a plurality of even boards 20 are arranged along the extending direction of the central axis, in order to wind the central axis and when following the continuous rotation of predetermined direction at connecting lever subassembly 30, drive each even board 20 simultaneous movement, so that each moving contact subassembly 2 switches over in turn between the combined floodgate position and the separating brake position, compare with the transmission of rack and pinion among the prior art, this application can drive a plurality of even boards 20 simultaneous movement through connecting lever subassembly 30's rotation, the moving contact subassembly of circuit breaker is when separating brake and combined floodgate, turned angle is less, and do not need the switching-over device, transmission structure is simple, it is reliable, the problem that the drive structure that is used for driving the moving contact subassembly of circuit breaker among the prior art removes is comparatively complicated has been solved.

Specifically, each of the link plates 20 is connected to the corresponding movable contact assembly 2 by a pin penetrating through the link plate 20 and the movable contact assembly 2.

Specifically, the crank arm assembly 30 includes: a center shaft 31, the center shaft 31 being inserted through the conductor member 10, an axis of the center shaft 31 being a center axis; the hinge column assembly 32, the crank arm assembly 30 is hinged with the plurality of connecting plates 20 through the hinge column assembly 32; a transition plate assembly 33, the transition plate assembly 33 being disposed between the center shaft 31 and the hinge post assembly 32 and fixedly connected with the center shaft 31 and the hinge post assembly 32.

As shown in fig. 2 and 3, the hinge post assembly 32 includes a hinge post 320, and the tie plate 20 is hinged to the hinge post 320: the transition plate assembly 33 includes a plurality of transition plates 330, the plurality of transition plates 330 are spaced along the extending direction of the central axis, a hinge gap 331 is formed between two adjacent transition plates 330, and the hinge columns 320 are disposed in the hinge gap 331 and connected to the transition plates 330 at both sides of the hinge gap 331.

Optionally, there is one hinge column 320, two transition plates 330, and a plurality of connecting plates 20 are hinged to the same hinge column 320; or the number of the hinge columns 320 is multiple, the number of the transition plates 330 is more than two, and a plurality of hinge gaps 331 formed between the plurality of transition plates 330 are arranged in one-to-one correspondence with the plurality of hinge columns 320.

In an embodiment of the present invention, when the hinge post 320 is plural, the axis of each hinge post 320 is parallel to the central axis and equidistant from the central axis.

Specifically, the axis of the hinge post 320 is parallel to the central axis; and/or a plurality of transition plates 330 are disposed in parallel.

Specifically, the central shaft 31 includes a first shaft section 311 and a second shaft section 312, an axis of the first shaft section 311 and an axis of the second shaft section 312 both coincide with the central axis, and the first shaft section 311 and the second shaft section 312 are respectively disposed on both sides of the transition plate assembly 33.

As shown in fig. 2 and 3, the plurality of tie sheets 20 includes a first tie sheet 21 and a second tie sheet 22, the hinge column assembly 32 includes a first hinge column 321 and a second hinge column 322, the first tie sheet 21 is hinged with the first hinge column 321, and the second tie sheet 22 is hinged with the second hinge column 322; the transition plate assembly 33 includes a first transition plate 332, a second transition plate 333 and a third transition plate 334 which are sequentially arranged, two ends of the first hinge column 321 are respectively connected with the first transition plate 332 and the second transition plate 333, and two ends of the second hinge column 322 are respectively connected with the second transition plate 333 and the third transition plate 334.

Specifically, the moving direction of the first connecting plate 21 is parallel to the moving direction of the second connecting plate 22, and the first hinge pillar 321 and the second hinge pillar 322 are located on two opposite sides of the central axis 31.

Specifically, the center line of the second transition plate 333 in the center axis direction coincides with the center axis.

As shown in fig. 18, in the second embodiment of the present invention, the moving direction of the first link plate 21 and the moving direction of the second link plate 22 are set at a predetermined angle; the distance direction between the axis of the first hinge post 321 and the central axis is the first distance direction, and the distance direction between the axis of the second hinge post 322 and the central axis is the second distance direction, and the first distance direction and the second distance direction are arranged at a predetermined included angle.

Specifically, the predetermined included angle is 90 °; and/or one end of the second transition plate 333 is connected to the first hinge post 321 and the other end of the second transition plate 333 is connected to the second hinge post 322.

In the second embodiment of the present invention, the conductor component 10 is in an L-shaped structure to form a guide channel 100 in an L-shaped structure, the guide channel 100 includes two guide sections perpendicular to each other, and each movable contact assembly 2 is located in a corresponding guide section.

Specifically, one end of the first transition plate 332 is fixedly connected with the central shaft 31, and the other end of the first transition plate 332 is connected with the first hinge column 321; and/or one end of the third transition plate 334 is fixedly connected with the central shaft 31, and the other end of the third transition plate 334 is connected with the second hinge post 322.

In a third embodiment of the present invention, the circuit breaker includes an isolating switch and a grounding switch, the isolating switch and the grounding switch are respectively disposed at two ends of the conductor component 10 along the extending direction of the conductor component 10, and the driving structure of the present application is used for controlling the switching-on between the moving contact and the stationary contact of the isolating switch and the switching-on between the moving contact and the stationary contact of the grounding switch; at this time, when the moving contact and the fixed contact of the disconnecting switch are switched on, the fixed contact 303 of the disconnecting switch is in conductive connection with the conductor component 10, at this time, the moving contact and the fixed contact of the grounding switch at the other end of the conductor component 10 are strictly forbidden to be switched on, otherwise, a serious grounding short-circuit fault can occur.

In order to prevent the ground short fault, referring to fig. 19 and 20, the plurality of link plates 20 includes a first link plate 21 and a second link plate 22, and the moving direction of the first link plate 21 is parallel to the moving direction of the second link plate 22; the hinge column assembly 32 comprises a third hinge column 323, and the first connecting plate 21 and the second connecting plate 22 are hinged with the third hinge column 323; the transition plate assembly 33 includes a fourth transition plate 335 and a fifth transition plate 336, and both ends of the third hinge column 323 are connected to the fourth transition plate 335 and the fifth transition plate 336, respectively.

Specifically, the central shaft 31 includes a first shaft section 311 and a second shaft section 312, one end of a fourth transition plate 335 is connected to the first shaft section 311, the other end of the fourth transition plate 335 is connected to a third hinge post 323, one end of a fifth transition plate 336 is connected to the second shaft section 312, and the other end of the fifth transition plate 336 is connected to the third hinge post 323. In this way, the mechanical interlocking between the two movable contact assemblies 2 can be realized, that is, the driving structure can realize: one of the two fractures 201 is in a closing state, and the other of the two fractures 201 is in an opening state; both fractures 201 are in the opening state.

In the embodiment of the present invention, the circuit breaker includes a plurality of moving contact assemblies 2 and two fixed contact assemblies 3, two moving contact assemblies 2 and two fixed contact assemblies 3, and a fracture 201 is provided between an end of each moving contact assembly 2 and the corresponding fixed contact assembly 3.

In an embodiment of the present invention, the driving structure further comprises: and the driving assembly 40, the driving assembly 40 is in driving connection with the crank arm assembly 30 so as to drive the crank arm assembly 30 to rotate around the central axis thereof.

As shown in fig. 2 and 5, the driving assembly 40 includes: a driving member 41, the driving member 41 having a driving shaft 410 rotatably provided; the drive shaft 410 is connected to the drive rod assembly 42 to rotate the drive rod assembly 42, and the drive rod assembly 42 is connected to the crank arm assembly 30 to rotate the crank arm assembly about its central axis.

In the embodiment of the present invention, the driving part 41 is a driving motor.

Specifically, the drive link assembly 42 includes: the insulating rod 420, the insulating rod 420 is connected with the crank arm assembly 30; the sealing rod 421 and the sealing assembly 43 sleeved on the sealing rod 421, the sealing rod 421 is connected with the insulating rod 420, and the sealing assembly 43 is installed on the casing 101 of the circuit breaker 1.

Specifically, the sealing assembly 43 includes a sealing sleeve, which is sleeved on the sealing rod 421, so that when the sealing rod 421 rotates, the sealing sleeve can prevent the gas in the circuit breaker from escaping, and plays a role of sealing the gas.

As shown in fig. 4 to 9, the driving structure further includes: and the limiting assembly 50 comprises a first limiting part 51 and a second limiting part 52 which are in limiting fit with each other, the first limiting part 51 is connected with the driving shaft 410, so that the first limiting part 51 moves relative to the second limiting part 52 under the driving of the driving shaft 410, and the driving shaft 410 stops rotating when the second limiting part 52 has a limiting effect on the first limiting part 51.

Specifically, the first limiting member 51 is provided with a movable groove 510, and a movable pin 511 movably arranged along the extending direction of the movable groove 510 is arranged in the movable groove 510; the second limiting part 52 is provided with an annular groove 520 and a limiting groove 521 communicated with the annular groove 520, the annular groove 520 extends along the circumferential direction of the second limiting part 52, and the movable groove 510 and the limiting groove 521 both extend along the radial direction of the annular groove 520; a portion of the movable pin 511 is located in the annular groove 520 to slide along the annular groove 520; the position limiting assembly 50 further includes an elastic member 53, and the elastic member 53 is connected to the movable pin 511, so that when the movable pin 511 moves to a position of the annular groove 520 opposite to the position limiting groove 521, the movable pin 511 moves into the position limiting groove 521 under the action of the elastic member 53.

Specifically, when the moving contact assembly 2 and the fixed contact assembly 3 of the circuit breaker are in a closing state, the moving groove 510 and the limiting groove 521 are correspondingly disposed.

Specifically, the plurality of limiting grooves 521 are arranged along the circumferential direction of the annular groove 520; and/or the position limiting assembly 50 further comprises a reset button 54, wherein the reset button 54 is arranged corresponding to the position limiting groove 521, so that the movable pin 511 is driven by the reset button 54 to move from the position limiting groove 521 into the annular groove 520.

In an embodiment of the present invention, the limiting groove 521 includes a first limiting groove and a second limiting groove, and the first limiting groove and the second limiting groove are disposed oppositely.

Specifically, the reset button 54 includes a first reset button and a second reset button, the first reset button is disposed corresponding to the first limit groove, and the second reset button is disposed corresponding to the second limit groove.

Specifically, the elastic member 53 is a spring.

In the embodiment of the present invention, the circuit breaker further includes two static contact assemblies 3, two moving contact assemblies 2 and two static contact assemblies 3 are provided, and a fracture 201 is provided between an end of each moving contact assembly 2 and the corresponding static contact assembly 3.

In the implementation process of the first embodiment of the present invention, as shown in fig. 10 and 11, when the fixed contact assembly 3 and the movable contact assembly 2 of the circuit breaker are in a closing state, the movable pin 511 is inserted into the movable groove 510 of the first limiting member 51 and the first limiting groove of the second limiting member 52, as shown in fig. 12 and 13, the first reset button is pressed to make the movable pin 511 come out of the first limiting groove, the driving assembly 40 is powered on, the driving member 41 drives the crank arm assembly 30 and the first limiting member 51 to rotate, so as to drive the movable pin 511 to rotationally slide in the movable groove 510 along with the first limiting member 51 and to circumferentially move along the annular groove 520, as shown in fig. 14 and 15, when the movable pin 511 is driven by the first limiting member 51 to move to the second limiting groove, the movable pin 511 enters the second limiting groove under the elastic force of the elastic member 53, so that the movable pin 511 is fixed in the second limiting groove, so as to make the movable contact assembly 2 and the fixed to the fixed contact assembly 3 switch from the closing state to the fully opening state, at this time, the driving member 41 stops rotating the driving shaft 410; as shown in fig. 16 to 17, the second reset button is pressed to push the movable pin 511 to be disengaged from the second limit groove, and enter the annular groove 520, the driving assembly 40 is powered on, and the driving assembly 40 is started, so that the driving assembly 41 drives the first limit part 51 to rotate continuously, and the movable pin 511 is driven to move into the first limit groove, thereby completing the switching from the complete opening state to the closing state. Therefore, the driving structure can simultaneously switch on and switch off a plurality of fractures 201 of the static contact component 3 and the moving contact component 2 without arranging a rack and pinion structure at each fracture, and the driving structure can simultaneously switch on and switch off a plurality of fractures 201 by only adopting one group of driving components 40, so that the driving structure is simple in transmission and reduces the production cost.

Referring to fig. 1 to 20, the present invention further provides a circuit breaker, including a conductor component 10 and a plurality of movable contact assemblies 2, where the plurality of movable contact assemblies 2 are movably disposed in a cavity of the conductor component 10, and the circuit breaker further includes: in the driving structure, the driving structure is connected with the plurality of moving contact assemblies 2 to drive the plurality of moving contact assemblies 2 to synchronously move to respective opening positions or closing positions.

Specifically, the conductive member 10 is provided with an escape opening 110 to escape the crank arm assembly 30 and the plurality of tie plates of the actuating structure through the escape opening 110.

Specifically, as shown in fig. 1, the circuit breaker further includes: the fixed contact component 3 is detachably connected with the movable contact component 2, the fixed contact component 3 comprises a fixed contact base 303 for mounting a fixed contact, and the fixed contact base 303 is connected with the shell 101; here, a first insulating member 301 is provided between the stationary contact 303 and the casing 101 to seal a gap between the stationary contact 303 and the casing 101 by the first insulating member 301.

Specifically, the number of the fixed contact assemblies 3 is plural, and the plural fixed contact assemblies 3 and the plural movable contact assemblies 2 are provided in one-to-one correspondence.

Specifically, there are two fixed contact assemblies 3, and the two fixed contact assemblies 3 are respectively disposed at two ends of the conductor member 10 along the length direction thereof.

Specifically, the static contact assembly 3 and the moving contact assembly 2 are arranged at intervals along the length direction of the conductor component 10, so that a fracture 201 is formed between the static contact assembly 3 and the moving contact assembly 2.

Specifically, a second insulating member 302 is provided between the conductor member 10 and the housing 101 to seal a gap between the conductor member 10 and the housing 101 by the second insulating member 302.

Specifically, a guide sleeve 203 is arranged between the conductor component 10 and the movable contact component 2, the guide sleeve 203 is sleeved on the movable contact component 2, the movable contact component 2 can move along the length direction (i.e. the horizontal direction) of the conductor under the action of the guide sleeve 203, and a first avoidance groove for avoiding the guide sleeve 203 is arranged on the inner wall surface of the guide channel 100 of the conductor component 10.

Specifically, the number of the guide sleeves 203 is plural, the plural guide sleeves 203 are arranged at intervals along the extending direction of the conductor component 10, and the number of the first avoidance grooves is plural, so that the guide sleeves 203 are located in the corresponding first avoidance grooves after the guide sleeves 203 move to the predetermined position.

Specifically, a spring contact finger 202 is further disposed between the conductor member 10 and the movable contact member 2, the spring contact finger 202 is sleeved on the movable contact member 2 and abuts against an inner wall surface of the guide channel 100 of the conductor member 10, wherein the spring contact finger 202 is made of a conductive material so as to be electrically connected with the conductor member 10 through the spring contact finger 202. The inner wall surface of the guide passage 100 of the conductor member 10 has a second escape groove for escaping the spring contact finger 202.

Specifically, the circuit breaker further includes a mounting seat 204, the mounting seat 204 is inserted into the moving contact assembly 2, and the static contact assembly 3 is inserted into the insertion cavity of the mounting seat 204, so as to connect the static contact assembly 3 and the moving contact assembly 2 through the mounting seat 204. Wherein the mount 204 is made of copper and tungsten material.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A drive structure for driving a plurality of movable contact assemblies (2) of a circuit breaker (1) to move, a conductor member (10) being provided in said circuit breaker (1), said conductor member (10) having a guide channel (100) accommodating said movable contact assemblies (2), said drive structure comprising:

the connecting plates (20) are all arranged in the guide channel (100) and are used for being connected with the moving contact assemblies (2) in a one-to-one correspondence manner;

the crank arm assembly (30), at least part of the crank arm assembly (30) is arranged in the guide channel (100) and is respectively hinged with the connecting plates (20), and the crank arm assembly (30) is rotatably arranged around the central axis thereof;

the connecting plates (20) are arranged along the extending direction of the central axis, so that when the crank arm assembly (30) rotates around the central axis continuously along a preset direction, each connecting plate (20) is driven to move synchronously, and each movable contact assembly (2) is switched between a switching-on position and a switching-off position alternately.

2. The drive arrangement according to claim 1, characterized in that the crank arm assembly (30) comprises:

a center shaft (31), wherein the center shaft (31) is arranged on the conductor component (10) in a penetrating way, and the axis of the center shaft (31) is the center axis;

a hinge post assembly (32), the crank arm assembly (30) being hinged to the plurality of tie plates (20) by the hinge post assembly (32);

a transition plate assembly (33), wherein the transition plate assembly (33) is arranged between the central shaft (31) and the hinge column assembly (32) and is fixedly connected with the central shaft (31) and the hinge column assembly (32).

3. The drive arrangement according to claim 2, characterized in that the central shaft (31) comprises a first shaft section (311) and a second shaft section (312), the axis of the first shaft section (311) and the axis of the second shaft section (312) both coinciding with the central axis, the first shaft section (311) and the second shaft section (312) being arranged on both sides of the transition plate assembly (33), respectively.

4. The drive structure of claim 2, wherein the plurality of tie plates (20) comprises a first tie plate (21) and a second tie plate (22), the hinge column assembly (32) comprises a first hinge column (321) and a second hinge column (322), the first tie plate (21) is hinged with the first hinge column (321), and the second tie plate (22) is hinged with the second hinge column (322); the transition plate assembly (33) comprises a first transition plate (332), a second transition plate (333) and a third transition plate (334) which are sequentially arranged, two ends of a first hinge column (321) are respectively connected with the first transition plate (332) and the second transition plate (333), and two ends of a second hinge column (322) are respectively connected with the second transition plate (333) and the third transition plate (334).

5. The drive configuration according to claim 4,

the moving direction of the first connecting plate (21) is parallel to the moving direction of the second connecting plate (22), and the first hinge column (321) and the second hinge column (322) are positioned on two opposite sides of the central shaft (31).

6. Drive configuration as claimed in claim 4,

the moving direction of the first connecting plate (21) and the moving direction of the second connecting plate (22) form a preset included angle; the axis of first articulated post (321) with distance direction between the central axis is first distance direction, with the axis of second articulated post (322) with distance direction between the central axis is second distance direction, first distance direction with be between the second distance direction predetermined contained angle sets up.

7. The drive structure according to claim 2, wherein the plurality of link plates (20) include a first link plate (21) and a second link plate (22), a moving direction of the first link plate (21) being parallel to a moving direction of the second link plate (22); the hinge column assembly (32) comprises a third hinge column (323), and the first connecting plate (21) and the second connecting plate (22) are hinged with the third hinge column (323); wherein the transition plate assembly (33) comprises a fourth transition plate (335) and a fifth transition plate (336), and both ends of the third hinge column (323) are respectively connected with the fourth transition plate (335) and the fifth transition plate (336).

8. The drive structure according to any one of claims 1 to 7, characterized in that the drive structure further comprises:

a drive assembly (40), said drive assembly (40) comprising a drive member (41), said drive member (41) having a rotatably disposed drive shaft (410);

the driving shaft (410) is connected with the transmission rod assembly (42) so as to drive the transmission rod assembly (42) to rotate, and the transmission rod assembly (42) is connected with the crank arm assembly (30); to drive the crank arm assembly (30) to rotate around the central axis thereof;

wherein the drive rod assembly (42) comprises an insulating rod (420), and the insulating rod (420) is connected with the crank arm assembly (30); sealing rod (421) and cover are established sealing assembly (43) on sealing rod (421), sealing rod (421) with insulating rod (420) are connected, sealing assembly (43) are installed on casing (101) of circuit breaker (1).

9. The drive structure of claim 8, further comprising:

the limiting assembly (50) comprises a first limiting part (51) and a second limiting part (52) which are in limiting fit with each other, the first limiting part (51) is connected with the driving shaft (410), so that the first limiting part (51) moves relative to the second limiting part (52) under the driving of the driving shaft (410), and the driving shaft (410) stops rotating when the second limiting part (52) limits the first limiting part (51).

10. Drive configuration as claimed in claim 9,

a movable groove (510) is formed in the first limiting part (51), and a movable pin (511) which is movably arranged along the extending direction of the movable groove (510) is arranged in the movable groove (510);

an annular groove (520) and a limiting groove (521) communicated with the annular groove (520) are formed in the second limiting part (52), the annular groove (520) extends along the circumferential direction of the second limiting part (52), and the movable groove (510) and the limiting groove (521) both extend along the radial direction of the annular groove (520); a portion of the movable pin (511) is located within the annular groove (520) to slide along the annular groove (520);

the limiting assembly (50) further comprises an elastic component (53), wherein the elastic component (53) is connected with the movable pin (511) so that the movable pin (511) moves into the limiting groove (521) under the action of the elastic component (53) when the movable pin (511) moves to the position, opposite to the limiting groove (521), of the annular groove (520).

11. The utility model provides a circuit breaker, includes conductor part (10) and a plurality of moving contact subassembly (2), a plurality of moving contact subassemblies (2) are all movably set up in the cavity of conductor part (10), its characterized in that, circuit breaker still includes:

the drive structure of any one of claims 1 to 10, said drive structure being connected to said plurality of movable contact assemblies (2) to drive said plurality of movable contact assemblies (2) to move synchronously to respective open or closed positions.