Circuit breaker

Abstract

The invention 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 invention 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 present invention relates to the technical field of circuit breakers, and in particular to a circuit breaker. Background Art

[0002] Circuit breakers are widely used in industry, agriculture, transportation, mining, construction, national defense and other fields. They have multiple protection functions such as overload, short circuit, undervoltage protection, adjustable action value, high breaking capacity, convenience and safety. They are very widely used products in low-voltage electrical appliances.

[0003] In the prior art, the tripping mechanism of the circuit breaker is generally set to be mechanical, which causes a certain delay in the tripping action and cannot meet the use requirements of rapid tripping, thereby affecting the disconnection response efficiency in the event of an accident. Summary of the invention

[0004] The object of the present invention is to provide a circuit breaker with a simple structure, which can achieve rapid tripping by pneumatic means, has high breaking efficiency and quick response.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A circuit breaker, characterized in that it comprises a housing and an operating mechanism, an arc extinguishing chamber and a driving rod arranged in the housing; wherein:

[0007] The operating mechanism comprises a traction rod, the traction rod is rotatably arranged in the housing, an air cavity connected to the arc extinguishing chamber is arranged in the housing, the driving rod is slidably arranged in the housing, a first end of the driving rod is located in the air cavity, and a second end of the driving rod is arranged corresponding to 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] Preferably, a side support is provided in the shell, the operating mechanism is supported on the side support, the air cavity is opened in the side support, and the driving rod is slidably connected to the side support.

[0010] Preferably, the side support seat is provided with a first cavity, a second cavity and a third cavity which are connected in sequence, the first cavity is connected with the air cavity, a first abutting end surface is provided between the first cavity and the second cavity, a second abutting end surface is provided between the second cavity and the third cavity, the side support seat is provided with a through hole connected with the third cavity, and the traction rod is provided with a push-butt head;

[0011] The driving rod includes a first rod portion, a second rod portion and a third rod portion which are arranged in sequence, the first rod portion, the second rod portion and the third rod portion are slidably connected to the first cavity, the second cavity and the third cavity respectively, the first abutting end surface is used to limit the first rod portion, the second abutting end surface is used to limit the third rod portion, the third rod portion passes through the through hole and extends out of the third cavity and is used to push the pushing head.

[0012] Preferably, the third rod portion includes a sliding portion, an extending portion and a pushing portion which are connected in sequence, the sliding portion is connected to the second rod portion, the sliding portion is slidably connected to the third cavity, the extending portion is arranged at an angle to the sliding portion, the extending portion passes through the through hole, and the pushing portion is located outside the third cavity and is used to push the pushing head.

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

[0014] Preferably, the side support includes a first plate portion and a second plate portion, the first plate portion and the second plate portion are buckled together to form the air cavity, the second plate portion is provided with an air hole connected to the air cavity, and the arc extinguishing chamber is connected to 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, and a fixing member passes through the first mounting hole and the second mounting hole and is fixedly connected to 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, and the two side supports are provided with docking bosses on the end surfaces facing each other, one of the docking bosses is provided with a socket, and the other docking boss is correspondingly provided with a plug, and the socket is plugged into the plug.

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

[0018] Preferably, the shell body is provided with a first embedding groove, the shell cover is correspondingly provided with a second embedding groove, 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 buckle, a jump buckle and an upper connecting rod, wherein the lock buckle is located between the traction rod and the jump buckle; wherein,

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

[0021] The side support seat is provided with a second hole, and the lock buckle is correspondingly provided with a second shaft, and the second shaft is rotatably connected to the second hole;

[0022] The side support seat is provided with a third hole, and the jump buckle is correspondingly provided with a third shaft, and the third shaft is rotatably connected to the third hole.

[0023] Preferably, the operating mechanism further comprises a jump buckle, an upper connecting rod and a lower connecting rod, two of the side supports are arranged at intervals, the jump buckle, the upper connecting rod and the lower connecting rod are all located between the two side supports, the jump buckle comprises two first side portions arranged at intervals and a first connecting portion connected between the two first side portions, the upper connecting rod comprises two second side portions arranged at intervals and a second connecting portion connected between the two second side portions, and the lower connecting rod comprises two third side portions arranged at intervals and a third connecting portion connected between the two third side portions;

[0024] The two first side parts and the two side supports are rotatably connected to the third shaft through the third hole; the two first side parts are provided with the third shaft, and the two side supports are provided with the third hole; or the two first side parts are provided with the third hole, and the two side supports are provided with the third shaft; or the two first side parts and the two side supports are each provided with the third shaft and the third hole;

[0025] The two first side parts and the two second side parts are rotatably connected via a fourth shaft and a first groove; the two first side parts are both provided with the fourth shaft, and the first ends of the two second side parts are both provided with the first groove; or the two first side parts are both provided with the first groove, and the first ends of the two second side parts are both provided with the fourth shaft; or the two first side parts and the two second side parts are each provided with a fourth shaft and the first groove;

[0026] The second ends of the two second side portions are each provided with a second groove, and the two third side portions are each provided with a fifth shaft, and the fifth shaft is rotatably connected to the second groove 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 groove and the fifth shaft, and 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 rotatably connected to the second groove, and the sixth shaft is rotatably connected to the fourth hole.

[0027] Beneficial effects:

[0028] The circuit breaker provided by the present invention, when a fault occurs in the circuit to which the circuit breaker is connected, will have extremely high arc voltage and arc energy, causing the internal metal material to evaporate, break down and melt, forming a high temperature and strong arc, and these reactions will decompose the oxygen in the air into nitrogen and oxygen, wherein the oxygen reacts chemically with the metal on the surface of the material to produce gas and release energy. A large amount of gas is generated in the arc extinguishing chamber and enters the air cavity, pushing the drive rod to move, causing the drive rod to push against the traction rod to swing, thereby causing the operating mechanism to complete the tripping action. The above process quickly realizes the tripping action of the circuit breaker by pneumatic means, effectively ensuring the breaking efficiency, and can achieve rapid tripping and quick response. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is an exploded schematic diagram of a circuit breaker provided by the present invention;

[0030] Figure 2 It is a schematic diagram of the operating mechanism of the circuit breaker provided by the present invention;

[0031] Figure 3 It is an exploded view of the operating mechanism of the circuit breaker provided by the present invention;

[0032] Figure 4 The present invention Figure 3 A partial enlarged view of the middle A;

[0033] Figure 5 is an exploded view of a partial structure of a circuit breaker operating mechanism provided by an embodiment of the present invention;

[0034] Figure 6 is an exploded view of a partial structure of a circuit breaker operating mechanism provided by another embodiment of the present invention;

[0035] Figure 7 It is an exploded schematic diagram of the housing and the housing cover provided by the present invention from a one-way perspective;

[0036] Figure 8 It is an exploded schematic diagram of the shell and the shell cover provided by the present invention from another perspective.

[0037] In the figure:

[0038] 1. Shell; 11. Side support; 1101. First plate portion; 11011. First mounting hole; 1102. Second plate portion; 1103. Air hole; 111. Air cavity; 112. First cavity; 113. Second cavity; 114. Third cavity; 115. First abutting end surface; 116. Second abutting end surface; 117. Perforation; 118. Butt convex head; 1181. Plug; 1191. First hole; 1192. Second hole; 1193. Third hole; 1194. Slot; 12. First elastic member; 13. First embedded groove; 14. Second elastic member; 15. Third elastic member;

[0039] 2. Shell cover; 21. Second embedding groove;

[0040] 31. traction rod; 311. push-butt head; 312. butt head; 313. first shaft; 32. lock buckle; 321. avoidance groove; 322. card-butt groove; 323. second shaft; 33. jump buckle; 331. first side portion; 3311. fourth shaft; 3312. third shaft; 332. first connecting portion; 333. card-butt head; 34. arc extinguishing chamber; 35. driving rod; 351. first rod portion; 352. second rod portion; 3 53. The third rod portion; 3531. The sliding portion; 3532. The extending portion; 3533. The pushing portion; 36. The upper connecting rod; 361. The second side portion; 3611. The first groove; 3612. The second groove; 3613. The sixth shaft; 362. The second connecting portion; 37. The lower connecting rod; 371. The third side portion; 3711. The fifth shaft; 3712. The fourth hole; 372. The third connecting portion; 38. The rocker arm; 381. The pressing portion. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] Reference Figures 1 to 8 As shown, this embodiment provides a circuit breaker. The circuit breaker includes a housing 1 and an operating mechanism, an arc extinguishing chamber 34 and a driving rod 35 arranged in the housing 1. The operating mechanism includes a traction rod 31, which is rotatably arranged in the housing 1, and an air cavity 111 connected to the arc extinguishing chamber 34 is arranged in the housing 1. The driving rod 35 is slidably arranged in the housing 1, and the first end of the driving rod 35 is located in the air cavity 111, and the second end of the driving rod 35 is arranged corresponding to the traction rod 31; the gas generated in the arc extinguishing chamber 34 enters the air cavity 111 and is used to push the driving rod 35 to move, and the driving rod 35 pushes the traction rod 31 to swing, so that the operating mechanism is released.

[0046] In this embodiment, when a fault occurs in the circuit to which the circuit breaker is connected, extremely high arc voltage and arc energy will occur, causing the internal metal material to evaporate, break down and melt, forming a high temperature and strong arc. These reactions will decompose the oxygen in the air into nitrogen and oxygen, where the oxygen reacts chemically with the metal on the surface of the material to produce gas and release energy. A large amount of gas is generated in the arc extinguishing chamber 34 and enters the air cavity 111, pushing the drive rod 35 to move, causing the drive rod 35 to push against the traction rod 31 to swing, thereby causing the operating mechanism to complete the tripping action. The above process quickly realizes the tripping action of the circuit breaker by pneumatic means, effectively ensuring the breaking efficiency, and can achieve rapid tripping and quick response.

[0047] Specifically in this embodiment, the operating mechanism also includes a lock catch 32 and a trip catch 33. The circuit breaker also includes a moving contact assembly and a stationary contact assembly. Among them, the lock catch 32 is located between the traction rod 31 and the trip catch 33, the drive rod 35 is provided with a butt joint 312, the drive rod 35 is provided with a first shaft 313, and the drive rod 35 is rotatably arranged on the housing 1 through the first shaft 313; the lock catch 32 is provided with a second shaft 323, and the lock catch 32 is rotatably arranged on the housing 1 through the second shaft 323, and a second elastic member 14 is connected between the lock catch 32 and the housing 1, and the second elastic member 14 is used to make the lock catch 32 always swing toward the side close to the traction rod 31. The lock catch 32 is provided with an avoidance groove 321 and a card groove 322, and the avoidance groove 321 is used to cooperate with the abutment head 312; the jump catch 33 is provided with a card head 333 for plugging and cooperating with the card groove 322, and a third elastic member 15 is connected between the jump catch 33 and the housing 1, and the jump catch 33 can rotate relative to the housing 1 and has a closing position and a tripping position, and the third elastic member 15 is used to make the jump catch 33 always have a tendency to swing toward the side away from the lock catch 32, that is, to swing toward the tripping position. The operating mechanism also includes an upper connecting rod 36 and a lower connecting rod 37, the first end of the upper connecting rod 36 is rotatably connected to the jump catch 33, the second end of the upper connecting rod 36 is rotatably connected to the first end of the lower connecting rod 37, and the lower connecting rod 37 is connected to the moving contact assembly. When the jump catch 33 swings from the closing position to the tripping position, the jump catch 33 drives the upper connecting rod 36 and the lower connecting rod 37 to swing, and then the lower connecting rod 37 drives the moving contact assembly to separate from the static contact assembly. It is understandable that the second elastic member 14 and the third elastic member 15 are arranged so that the lock buckle 32 and the trip buckle 33 always have a tendency to move away from each other, that is, to have a tripping action. When the trip buckle 33 is in the closed position, the abutting head 333 of the trip buckle 33 extends into the abutting groove 322 of the lock buckle 32, and the abutting head 312 is outside the avoidance groove 321 and abuts against the side wall of the lock buckle 32.

[0048] Exemplarily, when a large amount of gas is generated in the arc extinguishing chamber 34 and enters the air cavity 111, pushing 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 and the lock buckle 32 gradually moves away from the lock buckle 32, and in this process, the lock buckle 32 has the effect of always swinging toward the side close to the traction rod 31 under the action of the second elastic force. When the lock buckle 32 swings to a certain position, the abutment head 312 moves to a position opposite to the avoidance groove 321. Under the action of the second elastic member 14, the lock buckle 32 swings significantly in a short period of time, so that the abutment head 312 falls into the avoidance groove 321, and the above-mentioned swing of the lock buckle 32 also causes the abutment head 333 to disengage from the abutment groove 322. The jump buckle 33 swings to the tripping position under the drive of the third elastic member 15. At this time, the circuit breaker as a whole is in a tripped state, and the jump buckle 33 is unlocked and is in a free state, thereby driving the moving contact assembly and the static contact assembly to separate 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 configured as springs.

[0050] In this embodiment, the operating mechanism further includes a rocker arm 38, which is rotatably connected to the housing 1, and is provided with a pressing portion 381 that abuts against the trip button 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 necessary to drive the trip button 33 to close again, the rocker arm 38 is driven, so that the pressing portion 381 on the rocker arm 38 pushes the trip button to swing toward the direction close to the lock button 32. During the process, the trip button 33 pushes the lock button 32 to swing away from the traction rod 31, so that the abutting head 312 escapes from the avoidance groove 321 and abuts against the side wall of the lock button 32 again, and finally the abutting head 333 re-extends and abuts in the abutting groove 322, so that the trip button 33 is kept in the closing position again, and the trip button 33 is re-buckled, and then the moving contact assembly and the static contact assembly are driven to contact again through the upper connecting rod 36 and the lower connecting rod 37.

[0051] In this embodiment, a side support 11 is provided in the housing 1, the operating mechanism is supported on the side support 11, the air cavity 111 is opened in the side support 11, and the driving rod 35 is slidably connected to the side support 11. The side support 11 can, on the one hand, play a role in supporting the operating mechanism, and on the other hand, can serve as a part of the air blowing structure of the circuit breaker, and has strong integration.

[0052] In this embodiment, the side support 11 is provided with a first cavity 112, a second cavity 113 and a third cavity 114 which are connected in sequence. The first cavity 112 is connected to the air cavity 111. A first abutting end surface 115 is provided between the first cavity 112 and the second cavity 113. A second abutting end surface 116 is provided between the second cavity 113 and the third cavity 114. The side support 11 is provided with a through hole 117 which is connected to the third cavity 114. 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 slidably connected to the first cavity 112, the second cavity 113 and the third cavity 114 respectively. The first abutting end surface 115 is used to limit the first rod portion 351, the second abutting end surface 116 is used to limit the third rod portion 353, and the third rod portion 353 is provided with a through hole 117 extending out of the third cavity 114 and is used to push against 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 surface 115 is provided to slide and limit the driving rod 35 toward the side of the air cavity 111, and the second abutting end surface 116 is provided to slide and limit the driving rod 35 toward the side of the traction rod 31. Specifically, the first rod portion 351 is disposed in close contact with the inner wall of the first cavity 112 , which effectively ensures that the gas in the cavity 111 effectively drives the first rod portion 351 and avoids air leakage between the first rod portion 351 and the first cavity 112 .

[0053] Specifically, the third rod portion 353 includes a sliding portion 3531, an extension portion 3532, and a push 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 arranged at an angle with the sliding portion 3531, the extension portion 3532 is penetrated by a through hole 117, and the push portion 3533 is located outside the third cavity 114 and is used to push against the push head 311. The push portion 3533 is arranged to directly push the push head 311 of the traction rod 31, thereby driving the traction head to rotate. In this embodiment, the sliding portion 3531 and the push portion 3533 are arranged in parallel, and the sliding portion 3531 and the extension portion 3532 are arranged at a 90° angle.

[0054] In this embodiment, a first elastic member 12 is provided in the first cavity 112 and / or the third cavity 114, and the first elastic member 12 is configured to make the driving rod 35 always have a tendency to slide away from the side of the traction rod 31. Specifically, the first elastic member 12 can be provided in the first cavity 112, or in the third cavity 114. Exemplarily, in this embodiment, the first elastic member 12 is provided in the third cavity 114, and the two ends of the first elastic member 12 are respectively abutted against the sliding portion 3531 and the inner cavity wall of the third cavity 114. The first elastic member 12 is provided to drive the driving rod 35 to achieve automatic reset after the driving rod 35 eliminates the gas drive as a whole.

[0055] Exemplarily, the first elastic member 12 is configured as a spring.

[0056] In this embodiment, 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 buckled to form an air cavity 111, the second plate portion 1102 is provided with an air hole 1103 connected to the air cavity 111, and the arc extinguishing chamber 34 is connected to the air cavity 111 through the air hole 1103. Specifically, a large amount of gas generated in the arc extinguishing chamber 34 enters the air cavity 111 through the air hole 1103, and finally drives the driving rod 35. Specifically, the first plate portion 1101 and the second plate portion 1102 are connected by a fixing member. Optionally, the fixing member is set as a bolt, the first plate portion 1101 is provided with a first mounting hole 11011, the second plate portion 1102 is provided with a second mounting hole (not shown), and the bolt passes through the first mounting hole 11011 and is threadedly connected with the second mounting hole. In addition to being configured as a bolt, the fixing member can also be configured as a fixing pin, a fixing plug 1181, a bolt assembly or other connecting components.

[0057] In this embodiment, two side supports 11 are arranged at intervals, and the traction rod 31 and the operating mechanism are both located between the two side supports 11. The two side supports 11 are provided with docking protrusions 118 on the end surfaces facing each other, one of the docking protrusions 118 is provided with a plug hole, and the other docking protrusion 118 is correspondingly provided with a plug 1181, and the plug hole is plugged with the plug 1181. Specifically, the two side supports 11 are plugged and fixed with the plug 1181 and the plug hole, further realizing the reliability and stability of the connection between the side supports 11. When the plug 1181 is plugged with the plug hole, the two docking protrusions 118 are also abutted, which is reliable and stable.

[0058] Optionally, the number of the docking bosses 118 on each side support 11 can be adaptively set according to actual conditions.

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

[0060] Specifically, the housing 1 is provided with a first embedding groove 13, and the housing cover 2 is provided with a corresponding 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 can be connected by plugging, which has a simple structure, realizes fast installation and positioning, and is reliable and convenient to install. In addition, the plug-in method also eliminates the use of external connectors such as screws and bolts, reduces costs, and simplifies the number of components.

[0061] Specifically, the side support 11 defines a first hole 1191 , and the first shaft 313 is rotatably connected to the first hole 1191 ; the side support 11 defines 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 passed through the two first holes 1191 and are rotatably connected to the corresponding first holes 1191, and the opposite ends of the second shaft 323 are respectively passed through the two second holes 1192 and are rotatably connected to the corresponding second holes 1192. Optionally, the side support 11 may also be provided with a corresponding groove structure, and the first shaft 313 and the second shaft 323 cooperate 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 jumper 33, the upper connecting rod 36, and the lower connecting rod 37 are all located between the two side supports 11. The jumper 33 includes 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 includes 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 includes 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 to the third shaft 3312 through the third hole 1193. 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 to the third hole 1193 of the corresponding side. Optionally, the third shaft 3312 and the first side portion 331 can be integrally formed, or can be detachably connected by external connectors such as screws.

[0065] In some other optional 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 optional 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 on one side are respectively provided with the third shaft 3312 and the third hole 1193, and the first side portion 331 and the side support 11 on the other side are respectively provided with the third hole 1193 and the third shaft 3312.

[0067] Optionally, the feature for rotationally connecting with the third shaft 3312 may be a groove structure in addition to being set as the third hole 1193 .

[0068] The two first side portions 331 and the two second side portions 361 are rotatably connected via the fourth shaft 3311 and the first slot 3611. Figure 5 As shown, both first side portions 331 are provided with a fourth shaft 3311, and both first ends of the second side portions 361 are provided with a first slot 3611. The fourth shaft 3311 is rotatably connected to the first slot 3611 on the corresponding side. The fourth shaft 3311 is rotatably connected to the corresponding first slot 3611, which can omit the setting of the entire long shaft in the transmission hinge structure, effectively simplifying the structure.

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

[0070] In some optional embodiments, the two first side portions 331 and the two second side portions 361 are each provided with a fourth axis 3311 and a first groove 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 on one side are respectively provided with a fourth axis 3311 and a first groove 3611, and the first side portion 331 and the second side portion 361 on the other side are respectively provided with a first groove 3611 and a fourth axis 3311.

[0071] Optionally, the feature rotatably connected to the fourth shaft 3311 may be a hole structure in addition to being set as the first groove 3611.

[0072] Reference Figure 5 As shown, the second ends of the two second side portions 361 are each provided with a second slot 3612, and the two third side portions 371 are each provided with a fifth shaft 3711, which is rotatably connected to the second slot 3612 on the corresponding side. With the above arrangement, the fifth shaft 3711 is rotatably connected to the corresponding second slot 3612, which can omit the arrangement of the entire long shaft in the transmission hinge structure, effectively simplifying the structure.

[0073] In some other optional embodiments, refer 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 groove 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 in the second groove 3612, and the sixth shaft 3613 is rotatably connected in the fourth hole 3712. In this way, two sets of rotational cooperation are formed between the second groove 3612 and the fifth shaft 3711 and between the sixth shaft 3613 and the fourth hole 3712, which can simplify the connection structure of the upper connecting rod 36 and the lower connecting rod 37 while also omitting the entire long shaft.

[0074] Optionally, the feature rotatably connected to the fifth shaft 3711 may be a hole structure in addition to being the second groove 3612. The feature rotatably connected to the sixth shaft 3613 may be a groove structure in addition to being the fourth hole 3712.

[0075] Optionally, the fourth axis 3311 and the first side portion 331 , the fifth axis 3711 and the third side portion 371 , and the sixth axis 3613 and the second side portion 361 are integrally formed and arranged, which has a simple structure and is easy to process.

[0076] Optionally, 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 connectors such as screws. For example, taking the fourth shaft 3311 and the first side portion 331 being connected by screws as an example, the first side portion 331 is provided with a first fixing hole, the fourth shaft 3311 is provided with a second fixing hole, the second fixing hole is set as a threaded hole, and the screw passes through the first fixing hole and is threadedly connected with the second fixing hole, so that the connection between the fourth shaft 3311 and the first side portion 331 can be achieved. Such a configuration makes the fourth shaft 3311 detachable relative to the first side portion 331, which is convenient for replacement of the fourth shaft 3311 after long-term use and wear.

[0077] Furthermore, the operating mechanism further includes a rotating shaft (not shown), which is disposed between the two third side portions 371, and the rotating shaft and the two third side portions 371 are rotatably connected via the seventh shaft and the fifth hole. Optionally, both of the two third side portions 371 are provided with a fifth hole, and both sides corresponding to the rotating shaft are provided with a seventh shaft, and the seventh shaft is rotatably connected to the corresponding fifth hole.

[0078] In some other optional embodiments, the two third side portions 371 are each provided with a seventh shaft, and the corresponding two sides of the shaft are each provided with a fifth hole, and the seventh shaft is rotatably connected to the corresponding fifth hole.

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

[0080] Optionally, in addition to being able to rotatably cooperate with the fifth hole, the seventh shaft may also be provided with a corresponding groove structure, and the seventh shaft cooperates with the groove structure to also realize the rotatable connection between the third side portion 371 and the rotating shaft.

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

[0082] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A circuit breaker, characterized in that: It comprises a housing (1), and an operating mechanism, an arc extinguishing chamber (34) and a driving rod (35) arranged in the housing (1); wherein: The operating mechanism comprises a traction rod (31), the traction rod (31) is rotatably arranged in the housing (1), an air cavity (111) connected to the arc extinguishing chamber (34) is arranged in the housing (1), the driving rod (35) is slidably arranged in the housing (1), a first end of the driving rod (35) is located in the air cavity (111), and a second end of the driving rod (35) is arranged corresponding to the traction rod (31); The gas generated in the arc extinguishing chamber (34) enters the gas cavity (111) and is used to push the driving rod (35) to move, and the driving rod (35) pushes the traction rod (31) to swing, so that the operating mechanism is released.

2. The circuit breaker according to claim 1, characterized in that: A side support (11) is arranged in the shell (1), the operating mechanism is supported on the side support (11), the air cavity (111) is opened in the side support (11), and the driving 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) is provided with a first cavity (112), a second cavity (113) and a third cavity (114) which are connected in sequence; the first cavity (112) is connected to the air cavity (111); a first abutting end surface (115) is provided between the first cavity (112) and the second cavity (113); a second abutting end surface (116) is provided between the second cavity (113) and the third cavity (114); the side support (11) is provided with a through hole (117) which is connected to the third cavity (114); and the traction rod (31) is provided with a push-butting head (311); The driving rod (35) comprises a first rod portion (351), a second rod portion (352) and a third rod portion (353) which are arranged in sequence; 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 surface (115) is used to limit the first rod portion (351); the second abutting end surface (116) is used to limit the third rod portion (353); the third rod portion (353) passes through the through hole (117) and extends out of the third cavity (114) and is used to push against the pushing head (311).

4. The circuit breaker according to claim 3, characterized in that: The third rod portion (353) includes a sliding portion (3531), an extending portion (3532) and a pushing portion (3533) which are 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 extending portion (3532) and the sliding portion (3531) are arranged at an angle, the extending portion (3532) passes through the through hole (117), and the pushing portion (3533) is located outside the third cavity (114) and is used to push the pushing head (311).

5. The circuit breaker according to claim 3, characterized in that: A first elastic member (12) is disposed in the first cavity (112) and / or the third cavity (114), and the first elastic member (12) is configured to ensure that the driving rod (35) always has a tendency to slide away from one side of the traction rod (31).

6. The circuit breaker according to claim 2, characterized in that: The side support (11) comprises a first plate portion (1101) and a second plate portion (1102); the first plate portion (1101) and the second plate portion (1102) are engaged with each other to form the air cavity (111); the second plate portion (1102) is provided with an air hole (1103) connected to the air cavity (111); and the arc extinguishing chamber (34) is connected to 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) is provided with a first mounting hole (11011), the second plate portion (1102) is provided with a second mounting hole, and a fixing member 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 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 docking protrusions (118) on the end surfaces facing each other, one of the docking protrusions (118) is provided with a socket, and the other docking protrusion (118) is correspondingly provided with a plug (1181), and the socket is plugged into the plug (1181).

9. The circuit breaker according to claim 2, characterized in that: It also comprises a shell cover (2) which is arranged on the shell (1), and the side support (11) is supported between the shell cover (2) and the shell (1).

10. The circuit breaker according to claim 9, characterized in that The shell (1) is provided with a first embedding groove (13), and the shell 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).

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

12. The circuit breaker according to claim 2, characterized in that: The operating mechanism further comprises a jump buckle (33), an upper connecting rod (36) and a lower connecting rod (37); two side supports (11) are arranged at intervals; 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) 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); The two first side portions (331) and the two side supports (11) are rotatably connected to the third shaft (3312) via the third hole (1193); the two first side portions (331) are both provided with the third shaft (3312), and the two side supports (11) are both provided with the third hole (1193); or the two first side portions (331) are both provided with the third hole (1193), and the two side supports (11) are both provided with the third shaft (3312); or the two first side portions (331) and the two side supports (11) are each provided with one third shaft (3312) and one third hole (1193); The two first side portions (331) and the two second side portions (361) are rotatably connected via a fourth shaft (3311) and a first groove (3611); the two first side portions (331) are both provided with the fourth shaft (3311), and the first ends of the two second side portions (361) are both provided with the first groove (3611); or the two first side portions (331) are both provided with the first groove (3611), and the first ends of the two second side portions (361) are both provided with the fourth shaft (3311); or the two first side portions (331) and the two second side portions (361) are each provided with one fourth shaft (3311) and the first groove (3611); The second ends of the two second side portions (361) are each provided with a second groove (3612), and the two third side portions (371) are each provided with a fifth shaft (3711), and the fifth shaft (3711) is rotatably connected to the second groove (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 respectively provided with the second groove (3612) and the 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), and the fifth shaft (3711) is rotatably connected to the second groove (3612), and the sixth shaft (3613) is rotatably connected to the fourth hole (3712).

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