Circuit breaker

Abstract

The utility model belongs to the technical field of circuit breakers, and discloses a circuit breaker, which comprises a shell, and an operating mechanism, an arc extinguish chamber and a driving rod which are arranged in the shell, wherein the operating mechanism comprises a traction rod, the traction rod is rotationally arranged in the shell, an air cavity communicated with the arc extinguish chamber is formed in the shell, the driving rod is arranged in the shell in a sliding mode, the first end of the driving rod is located in the air cavity, and the second end of the driving rod corresponds to the traction rod; and gas generated in the arc extinguish chamber enters the gas cavity and is used for pushing the driving rod to move, and the driving rod pushes the traction rod to swing, so that the operating mechanism is tripped. The circuit breaker provided by the utility model is simple in structure, high in breaking efficiency and quick in response, and realizes quick tripping in a pneumatic mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field especially relates to a circuit breaker. BACKGROUND

[0002] Circuit breaker is widely used in industry and agriculture, transportation, mine, building and national defense etc. fields, has overload, short circuit, under voltage protection etc. multiple protection function, action value is adjustable, breaking capacity is high, convenient and safe, and it is the product that is used very widely in low voltage electric appliance.

[0003] In prior art, the tripping mechanism of circuit breaker is generally set as mechanical type, so the tripping action has certain delay, and the use requirement of fast tripping cannot be met, thereby affecting the breaking response efficiency in accident. UTILITY MODEL CONTENT

[0004] The utility model discloses a circuit breaker, simple structure, realize fast tripping through pneumatic mode, and breaking efficiency is high, and response is quick.

[0005] In order to achieve this purpose, the utility model adopts the following technical scheme:

[0006] A circuit breaker, characterized by comprising a shell and an operating mechanism, an arc extinguishing chamber and a driving rod arranged in the shell, wherein,

[0007] The operating mechanism comprises a traction rod, the traction rod is rotationally arranged in the shell, the shell is provided with a gas cavity communicated with the arc extinguishing chamber, the driving rod is slidingly arranged in the shell, the first end of the driving rod is located in the gas cavity, and the second end of the driving rod is correspondingly arranged with the traction rod.

[0008] The gas generated in the arc extinguishing chamber enters the gas cavity and is used to push the driving rod to move, and the driving rod pushes the traction rod to swing, so that the operating mechanism is tripped.

[0009] As preferably, the shell is provided with a side support, the operating mechanism is supported on the side support, the gas cavity is arranged in the side support, and the driving rod is slidingly connected to the side support.

[0010] As preferably, the side support is provided with a first cavity, a second cavity and a third cavity communicated in sequence, the first cavity is communicated with the gas cavity, a first abutting end face is arranged between the first cavity and the second cavity, a second abutting end face is arranged between the second cavity and the third cavity, the side support is provided with a through hole communicated with the third cavity, and the traction rod is provided with a pushing head.

[0011] The driving rod comprises a first rod portion, a second rod portion and a third rod portion arranged in sequence, the first rod portion, the second rod portion and the third rod portion are respectively in sliding connection with the first cavity, the second cavity and the third cavity, the first abutting end face is used for limiting the first rod portion, the second abutting end face is used for limiting the third rod portion, and the third rod portion extends out of the third cavity through the through hole and is used for pushing the pushing head.

[0012] Preferably, the third rod portion comprises a sliding portion, an outward extending portion and a pushing portion connected in sequence, the sliding portion is connected with the second rod portion, the sliding portion is in sliding connection with the third cavity, the outward extending portion is arranged at an angle with the sliding portion, the outward extending portion passes through the through hole, and the pushing portion is located outside the third cavity and is used for pushing the pushing head.

[0013] Preferably, a first elastic member is arranged in the first cavity and / or the third cavity, and the first elastic member is configured to make the driving rod always have a tendency to slide away from the traction rod.

[0014] Preferably, the side support comprises a first plate portion and a second plate portion, the first plate portion is buckled with the second plate portion to form the air cavity, the second plate portion is provided with an air hole communicated with the air cavity, and the arc extinguishing chamber is communicated with the air cavity through the air hole.

[0015] Preferably, the first plate portion is provided with a first mounting hole, the second plate portion is provided with a second mounting hole, a fixing member passes through the first mounting hole and the second mounting hole, and the fixing member is fixedly connected with the first mounting hole and the second mounting hole.

[0016] Preferably, two side supports are arranged at intervals, the traction rod and the operating mechanism are located between the two side supports, the two side supports are provided with butt heads on the end faces facing each other, one of the butt heads is provided with a socket, the other butt head is provided with a plug, and the socket is inserted with the plug.

[0017] Preferably, a shell cover is further arranged on the shell, and the side support is supported between the shell cover and the shell.

[0018] Preferably, the shell is provided with a first embedding groove, the shell cover is provided with a second embedding groove in correspondence, and the upper and lower ends of the side support are fixedly inserted into the first embedding groove and the second embedding groove respectively.

[0019] Preferably, the operating mechanism further comprises a lock catch, a jump catch and an upper connecting rod, the lock catch is located between the traction rod and the jump catch; wherein,

[0020] The side support is provided with a first hole, and the traction rod is provided with a first shaft corresponding to the first hole, and the first shaft is rotationally connected to the first hole;

[0021] The side support is provided with a second hole, and the lock catch is provided with a second shaft corresponding to the second hole, and the second shaft is rotationally connected to the second hole;

[0022] The side support is provided with a third hole, and the jump catch is provided with a third shaft corresponding to the third hole, and the third shaft is rotationally connected to the third hole.

[0023] As preferred, the operating mechanism further comprises a jump catch, an upper connecting rod and a lower connecting rod, the side supports are spaced apart, the jump catch, the upper connecting rod and the lower connecting rod are located between the two side supports, the jump catch comprises two first side portions spaced apart and a first connecting portion connected between the two first side portions, the upper connecting rod comprises two second side portions spaced apart and a second connecting portion connected between the two second side portions, and the lower connecting rod comprises two third side portions spaced apart and a third connecting portion connected between the two third side portions;

[0024] The two first side portions and the two side supports are rotationally connected through a third hole and a third shaft; the two first side portions are each provided with the third shaft, and the two side supports are each provided with the third hole; or the two first side portions are each provided with the third hole, and the two side supports are each provided with the third shaft; or the two first side portions and the two side supports are each provided with one third shaft and one third hole;

[0025] The two first side portions and the two second side portions are rotationally connected through a fourth shaft and a first slot; the two first side portions are each provided with the fourth shaft, and the first ends of the two second side portions are each provided with the first slot; or the two first side portions are each provided with the first slot, and the first ends of the two second side portions are each provided with the fourth shaft; or the two first side portions and the two second side portions are each provided with one fourth shaft and one first slot;

[0026] The second ends of the two second side portions are each provided with a second slot, the two third side portions are each provided with a fifth shaft, and the fifth shaft is rotationally connected to the second slot on the corresponding side; or the second end of the second side portion and the third side portion on one side are respectively provided with the second slot and the fifth shaft, the second end of the second side portion and the third side portion on the other side are respectively provided with a sixth shaft and a fourth hole, and the fifth shaft is rotationally connected to the second slot, and the sixth shaft is rotationally connected to the fourth hole.

[0027] Beneficial effects:

[0028] The circuit breaker provided by the utility model, when the circuit connected with the circuit breaker has a fault, very high arc voltage and arc energy will appear, which causes the evaporation, breakdown and melting of the internal metal material, forms high temperature and strong arc, these reactions will decompose the oxygen in the air into nitrogen and oxygen, and the oxygen will have chemical reaction with the metal on the material surface, generates gas and releases energy. A large amount of gas produced in the arc extinguishing chamber enters into the air cavity, pushes the driving rod to move, makes the driving rod push the traction rod to swing, and then makes the operating mechanism complete the tripping action. The above process realizes the tripping action of the circuit breaker quickly through the pneumatic mode, effectively guarantees the breaking efficiency, can realize quick tripping, and responds quickly. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is the explosion schematic view of the circuit breaker provided by the utility model;

[0030] Figure 2 It is the schematic view of the operating mechanism part of the circuit breaker provided by the utility model;

[0031] Figure 3 It is the explosion view of the operating mechanism part of the circuit breaker provided by the utility model;

[0032] Figure 4 It is the local enlarged view of A in the utility model; Figure 3

[0033] Figure 5 It is the explosion view of the operating mechanism part of the circuit breaker provided by the utility model;

[0034] Figure 6 It is the explosion view of the operating mechanism part of the circuit breaker provided by the utility model;

[0035] Figure 7 It is the explosion schematic view of the shell and the shell cover from one angle provided by the utility model;

[0036] Figure 8 It is the explosion schematic view of the shell and the shell cover from another angle provided by the utility model.

[0037] In the drawing:

[0038] ​1, shell; 11, side support; 1101, first plate part; 11011, first mounting hole; 1102, second plate part; 1103, air hole; 111, air cavity; 112, first cavity; 113, second cavity; 114, third cavity; 115, first abutting end face; 116, second abutting end face; 117, through hole; 118, butt protrusion; 1181, plug; 1191, first hole; 1192, second hole; 1193, third hole; 1194, insertion slot; 12, first elastic member; 13, first embedding slot; 14, second elastic member; 15, third elastic member;

[0039] 2, shell cover; 21, second embedding slot;

[0040] 31, traction rod; 311, push head; 312, abutting head; 313, first shaft; 32, lock catch; 321, avoiding slot; 322, clamping slot; 323, second shaft; 33, jump catch; 331, first side part; 3311, fourth shaft; 3312, third shaft; 332, first connecting part; 333, clamping head; 34, arc extinguishing chamber; 35, driving rod; 351, first rod part; 352, second rod part; 353, third rod part; 3531, sliding part; 3532, outward extending part; 3533, push part; 36, upper connecting rod; 361, second side part; 3611, first slot; 3612, second slot; 3613, sixth shaft; 362, second connecting part; 37, lower connecting rod; 371, third side part; 3711, fifth shaft; 3712, fourth hole; 372, third connecting part; 38, rocker arm; 381, abutting part. DETAILED DESCRIPTION

[0041] The utility model will be described in further detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model and are not limited to the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for the convenience of description, not all the structures.

[0042] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0043] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.Moreover, first feature is "on", "above" and "upper surface" of second feature includes that first feature is directly above and obliquely above second feature, or only indicates that horizontal height of first feature is higher than second feature.First feature is "under", "below" and "lower surface" of second feature includes that first feature is directly below and obliquely below second feature, or only indicates that horizontal height of first feature is less than second feature.

[0044] In the description of the embodiment, the terms "upper", "lower", "right", "left", "horizontal", "vertical", and "radial" refer to the orientation or position shown in the drawings, which are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] Referring to Figures 1 to 8 The utility model provides a circuit breaker. The circuit breaker comprises a housing 1, an operating mechanism, an arc extinguishing chamber 34 and a drive rod 35 arranged in the housing 1. The operating mechanism comprises a traction rod 31 rotatably arranged in the housing 1. The housing 1 is provided with an air cavity 111 communicated with the arc extinguishing chamber 34. The drive rod 35 is slidably arranged in the housing 1. The first end of the drive rod 35 is located in the air cavity 111. The second end of the drive rod 35 is arranged in correspondence with the traction rod 31. The gas generated in the arc extinguishing chamber 34 enters the air cavity 111 and is used to push the drive rod 35 to move. The drive rod 35 pushes the traction rod 31 to swing, so that the operating mechanism is tripped.

[0046] In the embodiment, when a fault occurs in the circuit connected with the circuit breaker, extremely high arc voltage and arc energy are generated, which causes the internal metal material to evaporate, break down and melt, forming high temperature and strong arc. These reactions can decompose oxygen in the air into nitrogen and oxygen. The oxygen reacts with the metal on the surface of the material to generate gas and release energy. A large amount of gas generated in the arc extinguishing chamber 34 enters the air cavity 111 and pushes the drive rod 35 to move, so that the drive rod 35 pushes the traction rod 31 to swing, thereby enabling the operating mechanism to complete the tripping action. The above process quickly realizes the tripping action of the circuit breaker in a pneumatic mode, effectively ensures the breaking efficiency, and can realize rapid tripping and rapid response.

[0047] Specific to the present embodiment, the operating mechanism further comprises a lock catch 32 and a trip catch 33. The circuit breaker further comprises a moving contact assembly and a static contact assembly. The lock catch 32 is located between the traction rod 31 and the trip catch 33, the driving rod 35 is provided with an abutting head 312, the driving rod 35 is provided with a first shaft 313, the driving rod 35 is rotatably arranged on the shell 1 through the first shaft 313; the lock catch 32 is rotatably arranged on the shell 1 through a second shaft 323, a second elastic member 14 is connected between the lock catch 32 and the shell 1, the second elastic member 14 is used to make the lock catch 32 have a tendency to always swing towards the side close to the traction rod 31, the lock catch 32 is provided with an avoiding slot 321 and a clamping slot 322, the avoiding slot 321 is used to cooperate with the abutting head 312; the trip catch 33 is provided with a clamping head 333 used to be inserted into the clamping slot 322, a third elastic member 15 is connected between the trip catch 33 and the shell 1, the trip catch 33 can rotate relative to the shell 1 to have a closed position and a tripped position, the third elastic member 15 is used to make the trip catch 33 always have a tendency to swing away from the side of the lock catch 32, i.e. swing towards the tripped position. The operating mechanism further comprises an upper connecting rod 36 and a lower connecting rod 37, the first end of the upper connecting rod 36 is rotatably connected with the trip catch 33, the second end of the upper connecting rod 36 is rotatably connected with the first end of the lower connecting rod 37, the lower connecting rod 37 is connected with the moving contact assembly, when the trip catch 33 swings from the closed position to the tripped position, the trip catch 33 drives the upper connecting rod 36 and the lower connecting rod 37 to swing, and then makes the lower connecting rod 37 drive the moving contact assembly to separate from the static contact assembly. It can be understood that the second elastic member 14 and the third elastic member 15 are arranged to make the lock catch 32 and the trip catch 33 always have a tendency to move away from each other, i.e. have a tripping action. When the trip catch 33 is in the closed position, the clamping head 333 of the trip catch 33 extends into the clamping slot 322 of the lock catch 32, and the abutting head 312 is outside the avoiding slot 321 and abuts against the side wall of the lock catch 32.

[0048] Exemplarily, when a large amount of gas generated in the arc extinguishing chamber 34 enters into the air cavity 111 and pushes the driving rod 35 to move, the driving rod 35 pushes the traction rod 31 to swing, so that the abutting side of the traction rod 31 gradually moves away from the lock catch 32, and in this process, the lock catch 32 has a tendency to always swing towards the side close to the traction rod 31 under the action of the second elastic force, when the lock catch 32 swings to a certain position, the abutting head 312 moves to a position opposite to the avoiding slot 321, the lock catch 32 swings a large amplitude in a short time under the action of the second elastic member 14, so that the abutting head 312 falls into the avoiding slot 321, and the above swing of the lock catch 32 also makes the clamping head 333 separate from the clamping slot 322, the trip catch 33 swings to the tripped position under the drive of the third elastic member 15, at this time, the circuit breaker as a whole is in a tripped state, the trip catch 33 is unlocked and in a free state, and then the moving contact assembly and the static contact assembly are separated through the upper connecting rod 36 and the lower connecting rod 37.

[0049] Exemplarily, the second elastic member 14 and the third elastic member 15 are provided as springs.

[0050] In the embodiment, the operating mechanism further comprises a rocker arm 38, the rocker arm 38 is rotationally connected to the housing 1, and the rocker arm 38 is provided with a pressing portion 381 abutting against the jump buckle 33. One end of the third elastic member 15 is arranged on the rocker arm 38, and the other end is arranged on the lower connecting rod 37. Specifically, when it is needed to drive the jump buckle 33 to reclose, the rocker arm 38 is driven to make the pressing portion 381 on the rocker arm 38 push the jump buckle 33 to swing towards the locking buckle 32, in the process, the jump buckle 33 pushes the locking buckle 32 to swing away from the traction rod 31, so that the abutting head 312 is out of the avoiding groove 321 and abuts against the side wall of the locking buckle 32 again, finally, the clamping head 333 is extended into and clamped in the clamping groove 322 again, so that the jump buckle 33 is kept in the reclosing position, and the jump buckle 33 is reclosed, and then the upper connecting rod 36 and the lower connecting rod 37 drive the moving contact assembly and the stationary contact assembly to contact again.

[0051] In the embodiment, the housing 1 is provided with a side support 11, the operating mechanism is supported on the side support 11, the air cavity 111 is arranged in the side support 11, and the driving rod 35 is slidingly connected to the side support 11. The side support 11 can support the operating mechanism, and can be integrated as part of the circuit breaker air blowing structure.

[0052] In the embodiment, the side support 11 is provided with a first cavity 112, a second cavity 113 and a third cavity 114 which are sequentially communicated, the first cavity 112 is communicated with the air cavity 111, the first cavity 112 and the second cavity 113 are provided with a first abutting end face 115, the second cavity 113 and the third cavity 114 are provided with a second abutting end face 116, the side support 11 is provided with a through hole 117 communicated with the third cavity 114, and the traction rod 31 is provided with a pushing head 311. The driving rod 35 includes a first rod portion 351, a second rod portion 352 and a third rod portion 353 which are sequentially arranged, the first rod portion 351, the second rod portion 352 and the third rod portion 353 are respectively slidably connected with the first cavity 112, the second cavity 113 and the third cavity 114, the first abutting end face 115 is used for limiting the first rod portion 351, the second abutting end face 116 is used for limiting the third rod portion 353, and the third rod portion 353 extends out of the third cavity 114 through the through hole 117 and is used for pushing the pushing head 311. Specifically, along the sliding direction of the driving rod 35, the length of the second rod portion 352 is configured to be greater than the length of the second cavity 113. The first abutting end face 115 is configured to limit the sliding of the driving rod 35 towards the side of the air cavity 111, and the second abutting end face 116 is configured to limit the sliding of the driving rod 35 towards the side of the traction rod 31. Specifically, the first rod portion 351 is arranged in close contact with the inner wall of the first cavity 112, which effectively ensures the effective driving of the gas in the air cavity 111 on the first rod portion 351 and avoids the leakage of gas between the first rod portion 351 and the first cavity 112.

[0053] Specifically, the third rod portion 353 includes a sliding portion 3531, an outward extending portion 3532 and a pushing portion 3533 which are sequentially connected, the sliding portion 3531 is connected with the second rod portion 352, the sliding portion 3531 is slidably connected with the third cavity 114, the outward extending portion 3532 is arranged at an angle with the sliding portion 3531, the outward extending portion 3532 extends through the through hole 117, and the pushing portion 3533 is located outside the third cavity 114 and is used for pushing the pushing head 311. The pushing portion 3533 is configured to directly push the pushing head 311 of the traction rod 31, thereby driving the traction head to rotate. In the embodiment, the sliding portion 3531 and the pushing portion 3533 are arranged in parallel, and the sliding portion 3531 and the outward extending portion 3532 are arranged at a 90° angle.

[0054] In the embodiment, the first elastic member 12 is arranged in the first cavity 112 and / or the third cavity 114, and is configured to make the driving rod 35 always have a tendency to slide away from the traction rod 31. Specifically, the first elastic member 12 can be arranged in the first cavity 112 or the third cavity 114. In the embodiment, the first elastic member 12 is arranged in the third cavity 114, and the two ends of the first elastic member 12 abut against the sliding part 3531 and the inner cavity wall of the third cavity 114, respectively. The first elastic member 12 is arranged to drive the driving rod 35 to automatically reset after the driving rod 35 is completely eliminated by the gas.

[0055] Specifically, the first elastic member 12 is a spring.

[0056] In the embodiment, the side support 11 includes a first plate part 1101 and a second plate part 1102, the first plate part 1101 and the second plate part 1102 are buckled to form the gas cavity 111, the second plate part 1102 is provided with a gas hole 1103 communicating with the gas cavity 111, and the arc extinguishing chamber 34 communicates with the gas cavity 111 through the gas hole 1103. Specifically, a large amount of gas generated in the arc extinguishing chamber 34 enters the gas cavity 111 through the gas hole 1103, and finally drives the driving rod 35. Specifically, the first plate part 1101 and the second plate part 1102 are connected by a fixing member. Alternatively, the fixing member is a bolt, the first plate part 1101 is provided with a first mounting hole 11011, the second plate part 1102 is provided with a second mounting hole (not shown), and the bolt is threadedly connected through the first mounting hole 11011 and the second mounting hole. In addition to the bolt, the fixing member can also be a fixed pin, a fixed plug 1181, a bolt assembly or the like.

[0057] In the embodiment, two side supports 11 are arranged at intervals, the traction rod 31 and the operating mechanism are located between the two side supports 11, and the two side supports 11 are provided with butt heads 118 on the end faces facing each other, one of the butt heads 118 is provided with a socket, and the other butt head 118 is provided with a plug 1181 corresponding to the socket, and the socket and the plug 1181 are inserted. Specifically, the two side supports 11 are inserted and fixed through the plug 1181 and the socket, and the reliability and stability of the connection between the two side supports 11 are further achieved. When the plug 1181 and the socket are inserted, the two butt heads 118 also abut against each other, which is reliable and stable.

[0058] Alternatively, the number of butt heads 118 on each side support 11 can be adaptively set according to actual conditions.

[0059] In the embodiment, the circuit breaker further comprises a cover 2 arranged on the shell 1, and the side support 11 is supported between the cover 2 and the shell 1. In this way, the side support 11 effectively supports the shell 1 and the cover 2, and further improves the structural strength of the circuit breaker as a whole.

[0060] Specifically, the shell 1 is provided with a first embedding groove 13, the cover 2 is correspondingly provided with a second embedding groove 21, and the upper and lower ends of the side support 11 are respectively fixedly inserted into the first embedding groove 13 and the second embedding groove 21. The first embedding groove 13 and the second embedding groove 21 are provided, so that the side support 11 is connected by insertion, which is simple in structure, fast in installation and positioning, and reliable and convenient in installation. In addition, the insertion mode also saves the use of external connecting members such as screws and bolts, reduces the cost, and simplifies the number of components.

[0061] Specifically, the side support 11 is provided with a first hole 1191, and the first shaft 313 is rotatably connected to the first hole 1191. The side support 11 is provided with a second hole 1192, and the second shaft 323 is rotatably connected to the second hole 1192.

[0062] Specifically, the two side supports 11 are each provided with a first hole 1191 and a second hole 1192, the opposite ends of the first shaft 313 are respectively inserted into the two first holes 1191 and rotatably connected to the corresponding first holes 1191, and the opposite ends of the second shaft 323 are respectively inserted into the two second holes 1192 and rotatably connected to the corresponding second holes 1192. Alternatively, the side support 11 can also be provided with a corresponding groove structure, and the first shaft 313 and the second shaft 323 are matched with the corresponding groove structure, so as to realize the rotatable connection between the side support 11 and the first shaft 313 and the second shaft 323.

[0063] Further, the jump buckle 33, the upper connecting rod 36 and the lower connecting rod 37 are located between the two side supports 11. The jump buckle 33 comprises two first side portions 331 arranged at intervals and a first connecting portion 332 connected between the two first side portions 331, the upper connecting rod 36 comprises two second side portions 361 arranged at intervals and a second connecting portion 362 connected between the two second side portions 361, and the lower connecting rod 37 comprises two third side portions 371 arranged at intervals and a third connecting portion 372 connected between the two third side portions 371.

[0064] The two first side portions 331 and the two side supports 11 are rotatably connected through a third hole 1193 and a third shaft 3312. Referring to Figure 3 、 Figure 5As shown, the two first side portions 331 are each provided with a third shaft 3312, and the two side supports 11 are each provided with a third hole 1193. The third shaft 3312 is rotatably connected in the third hole 1193 of the corresponding side. Alternatively, the third shaft 3312 and the first side portion 331 can be integrally formed, or can be detachably connected by external connecting members such as screws.

[0065] In some other alternative embodiments, the two first side portions 331 are each provided with a third hole 1193, and the two side supports 11 are each provided with a third shaft 3312.

[0066] In some other alternative embodiments, the two first side portions 331 and the two side supports 11 are each provided with a third shaft 3312 and a third hole 1193. Specifically, among the two first side portions 331 and the two side supports 11, the first side portion 331 and the side support 11 of one side are respectively provided with a third shaft 3312 and a third hole 1193, and the first side portion 331 and the side support 11 of the other side are respectively provided with a third hole 1193 and a third shaft 3312.

[0067] Alternatively, the feature of rotatably connecting with the third shaft 3312 can be a slot structure instead of the third hole 1193.

[0068] The two first side portions 331 and the two second side portions 361 are rotatably connected by fourth shafts 3311 and first slots 3611. Referring to Figure 5 As shown, the two first side portions 331 are each provided with a fourth shaft 3311, and the first ends of the two second side portions 361 are each provided with a first slot 3611. The fourth shaft 3311 is rotatably connected in the first slot 3611 of the corresponding side. The fourth shaft 3311 is rotatably connected with the corresponding first slot 3611, which can omit the setting of the whole long shaft in the transmission hinged structure, effectively simplifying the structure.

[0069] In some alternative embodiments, the two first side portions 331 are each provided with a first slot 3611, and the first ends of the two second side portions 361 are each provided with a fourth shaft 3311.

[0070] In some alternative embodiments, the two first side portions 331 and the two second side portions 361 are each provided with a fourth shaft 3311 and a first slot 3611. Specifically, among the two first side portions 331 and the two second side portions 361, the first side portion 331 and the second side portion 361 of one side are respectively provided with a fourth shaft 3311 and a first slot 3611, and the first side portion 331 and the second side portion 361 of the other side are respectively provided with a first slot 3611 and a fourth shaft 3311.

[0071] Alternatively, the feature of rotatably connecting with the fourth shaft 3311 can be a hole structure instead of the first slot 3611.

[0072] Referring to Figure 5 As shown, the second end of each of the two second side portions 361 is provided with a second slot 3612, and each of the third side portions 371 is provided with a fifth shaft 3711, which is rotatably connected to the corresponding second slot 3612. With the fifth shaft 3711 rotatably connected to the corresponding second slot 3612, the whole long shaft in the transmission hinged structure can be omitted, effectively simplifying the structure.

[0073] In some other optional embodiments, referring to Figure 6 As shown, the second end of the second side portion 361 and the third side portion 371 on one side are respectively provided with a second slot 3612 and a fifth shaft 3711, and the second end of the second side portion 361 and the third side portion 371 on the other side are respectively provided with a sixth shaft 3613 and a fourth hole 3712. The fifth shaft 3711 is rotatably connected to the second slot 3612, and the sixth shaft 3613 is rotatably connected to the fourth hole 3712. With the second slot 3612 and the fifth shaft 3711 and the sixth shaft 3613 and the fourth hole 3712 forming two sets of rotary connections, the whole long shaft can be omitted, and the connection structure of the upper connecting rod 36 and the lower connecting rod 37 can also be simplified.

[0074] Alternatively, the feature rotatably connected to the fifth shaft 3711 can be a hole structure instead of a second slot 3612. The feature rotatably connected to the sixth shaft 3613 can be a slot structure instead of a fourth hole 3712.

[0075] Alternatively, the fourth shaft 3311 and the first side portion 331, the fifth shaft 3711 and the third side portion 371, and the sixth shaft 3613 and the second side portion 361 can be integrally formed, which is simple in structure and convenient to process.

[0076] Alternatively, the fourth shaft 3311 and the first side portion 331, the fifth shaft 3711 and the third side portion 371, and the sixth shaft 3613 and the second side portion 361 can also be fixedly connected by external connecting members such as screws. For example, the fourth shaft 3311 and the first side portion 331 are connected by a screw. The first side portion 331 is provided with a first fixing hole, and the fourth shaft 3311 is provided with a second fixing hole which is a threaded hole. The screw is threadedly connected through the first fixing hole and the second fixing hole, thereby connecting the fourth shaft 3311 and the first side portion 331. With this arrangement, the fourth shaft 3311 is detachable relative to the first side portion 331, which facilitates replacement of the fourth shaft 3311 after long-term use and wear.

[0077] Further, the operating mechanism further comprises a rotating shaft (not shown), which is arranged between the two third side portions 371 and is rotatably connected with the two third side portions 371 through the seventh shaft and the fifth hole. Optionally, the two third side portions 371 are respectively provided with the fifth hole, and the rotating shaft is respectively provided with the seventh shaft on the two sides corresponding to the fifth hole.

[0078] In some other optional embodiments, the two third side portions 371 are respectively provided with the seventh shaft, and the rotating shaft is respectively provided with the fifth hole on the two sides corresponding to the seventh shaft.

[0079] In some other optional embodiments, the two third side portions 371 and the two sides of the rotating shaft are respectively provided with the seventh shaft and the fifth hole. Specifically, the third side portion 371 on one side of the two third side portions 371 and the corresponding side of the rotating shaft are respectively provided with the seventh shaft and the fifth hole, and the third side portion 371 on the other side of the two third side portions 371 and the corresponding side of the rotating shaft are respectively provided with the fifth hole and the seventh shaft.

[0080] Optionally, in addition to being rotatably matched with the fifth hole, the seventh shaft can be provided with a corresponding groove structure, and the seventh shaft is matched with the groove structure, so that the third side portion 371 and the rotating shaft are rotatably connected.

[0081] Specifically, the side support 11 is provided with a slot 1194, and the end of the rocker arm 38 extends into the slot 1194.

[0082] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. For those skilled in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A circuit breaker, characterized in that, It includes a housing (1) and an operating mechanism, an arc-extinguishing chamber (34), and a drive rod (35) disposed within the housing (1); wherein, The operating mechanism includes a traction rod (31), which is rotatably disposed within the housing (1). The housing (1) is provided with an air chamber (111) communicating with the arc-extinguishing chamber (34). The drive rod (35) is slidably disposed within the housing (1). The first end of the drive rod (35) is located within the air chamber (111), and the second end of the drive rod (35) is correspondingly disposed with the traction rod (31). The gas generated in the arc-extinguishing chamber (34) enters the gas cavity (111) and is used to push the drive rod (35) to move. The drive rod (35) pushes against the traction rod (31) to swing, so as to disengage the operating mechanism.

2. The circuit breaker according to claim 1, characterized in that, A side support (11) is provided inside the housing (1), the operating mechanism is supported on the side support (11), the air chamber (111) is opened inside the side support (11), and the drive rod (35) is slidably connected to the side support (11).

3. The circuit breaker according to claim 2, characterized in that, The side support (11) has a first cavity (112), a second cavity (113) and a third cavity (114) connected in sequence. The first cavity (112) is connected to the air cavity (111). A first abutting end face (115) is provided between the first cavity (112) and the second cavity (113). A second abutting end face (116) is provided between the second cavity (113) and the third cavity (114). The side support (11) has a through hole (117) connected to the third cavity (114). The traction rod (31) has a pushing head (311). The drive rod (35) includes a first rod portion (351), a second rod portion (352), and a third rod portion (353) arranged sequentially. The first rod portion (351), the second rod portion (352), and the third rod portion (353) are slidably connected to the first cavity (112), the second cavity (113), and the third cavity (114), respectively. The first abutting end face (115) is used to limit the first rod portion (351), and the second abutting end face (116) is used to limit the third rod portion (353). The third rod portion (353) extends out of the third cavity (114) through the through hole (117) and is used to push against the push head (311).

4. The circuit breaker according to claim 3, characterized in that, The third rod portion (353) includes a sliding portion (3531), an extension portion (3532), and a pushing portion (3533) connected in sequence. The sliding portion (3531) is connected to the second rod portion (352). The sliding portion (3531) is slidably connected to the third cavity (114). The extension portion (3532) is set at an angle to the sliding portion (3531). The extension portion (3532) passes through the through hole (117). The pushing portion (3533) is located outside the third cavity (114) and is used to push against the pushing head (311).

5. The circuit breaker according to claim 3, characterized in that, The first cavity (112) and / or the third cavity (114) are provided with a first elastic element (12), which is configured to make the drive rod (35) always have a tendency to slide away from the traction rod (31).

6. The circuit breaker according to claim 2, characterized in that, The side support (11) includes a first plate portion (1101) and a second plate portion (1102). The first plate portion (1101) and the second plate portion (1102) are engaged to form the air cavity (111). The second plate portion (1102) has an air hole (1103) communicating with the air cavity (111). The arc-extinguishing chamber (34) communicates with the air cavity (111) through the air hole (1103).

7. The circuit breaker according to claim 6, characterized in that, The first plate portion (1101) has a first mounting hole (11011), and the second plate portion (1102) has a second mounting hole. The fastener passes through the first mounting hole (11011) and the second mounting hole, and is fixedly connected to the first mounting hole (11011) and the second mounting hole.

8. The circuit breaker according to claim 2, characterized in that, Two side supports (11) are provided at intervals. The traction rod (31) and the operating mechanism are both located between the two side supports (11). Each of the two side supports (11) has a mating protrusion (118) on its end face facing each other. One of the mating protrusions (118) has a socket, and the other mating protrusion (118) has a corresponding plug (1181). The socket is inserted into the plug (1181).

9. The circuit breaker according to claim 2, characterized in that, It also includes a cover (2) that is placed on the housing (1), and the side support (11) is supported between the cover (2) and the housing (1).

10. The circuit breaker according to claim 9, characterized in that, The housing (1) has a first groove (13), and the cover (2) has a corresponding second groove (21). The upper and lower ends of the side support (11) are respectively fixedly inserted into the first groove (13) and the second groove (21).

11. The circuit breaker according to claim 2, characterized in that, The operating mechanism further includes a latch (32), a jump catch (33), and an upper connecting rod (36), wherein the latch (32) is located between the traction rod (31) and the jump catch (33); wherein, The side support (11) has a first hole (1191), and the traction rod (31) has a corresponding first shaft (313), which is rotatably connected to the first hole (1191). The side support (11) has a second hole (1192), and the latch (32) is provided with a second shaft (323), which is rotatably connected to the second hole (1192).

12. The circuit breaker according to claim 2, characterized in that, The operating mechanism also includes a jump buckle (33), an upper connecting rod (36), and a lower connecting rod (37). Two side supports (11) are spaced apart. The jump buckle (33), the upper connecting rod (36), and the lower connecting rod (37) are all located between the two side supports (11). The jump buckle (33) includes two spaced first side portions (331) and a first connecting portion (332) connecting the two first side portions (331). The upper connecting rod (36) includes two spaced second side portions (361) and a second connecting portion (362) connecting the two second side portions (361). The lower connecting rod (37) includes two spaced third side portions (371) and a third connecting portion (372) connecting the two third side portions (371). The two first side portions (331) and the two side supports (11) are rotatably connected to the third shaft (3312) through a third hole (1193); both first side portions (331) are provided with the third shaft (3312), and both side supports (11) are provided with the third hole (1193); or both first side portions (331) are provided with the third hole (1193), and both side supports (11) are provided with the third shaft (3312); or each of the two first side portions (331) and the two side supports (11) is provided with a third shaft (3312) and a third hole (1193). The two first side portions (331) and the two second side portions (361) are rotatably connected by a fourth shaft (3311) and a first groove (3611); both first side portions (331) are provided with the fourth shaft (3311), and the first end of both second side portions (361) is provided with the first groove (3611); or both first side portions (331) are provided with the first groove (3611), and the first end of both second side portions (361) is provided with the fourth shaft (3311); or each of the two first side portions (331) and the two second side portions (361) is provided with a fourth shaft (3311) and a first groove (3611). The second ends of both second side portions (361) are provided with second grooves (3612), and the two third side portions (371) are provided with fifth shafts (3711), which are rotatably connected to the second grooves (3612) on the corresponding side; or the second end of the second side portion (361) and the third side portion (371) on one side are provided with second grooves (3612) and fifth shafts (3711) respectively, and the second end of the second side portion (361) and the third side portion (371) on the other side are provided with sixth shafts (3613) and fourth holes (3712) respectively, with the fifth shafts (3711) rotatably connected to the second grooves (3612) and the sixth shafts (3613) rotatably connected to the fourth holes (3712).

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