CN210091946U

CN210091946U - Linkage structure of circuit breaker

Info

Publication number: CN210091946U
Application number: CN201920638812.7U
Authority: CN
Inventors: 尹冬梅; 万新建; 司莺歌
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2020-02-18
Anticipated expiration: 2029-05-06

Abstract

The utility model discloses a linkage structure of circuit breaker, including two circuit breakers and the universal driving shaft that is connected between two circuit breakers, two circuit breakers link through the universal driving shaft, each circuit breaker includes the casing and installs the operating device in the casing, the operating device includes the tripping lever and the connecting rod of pivotal connection in the casing, tripping lever and connecting rod hasp connection; the tripping lever is provided with a linkage shaft hole linked with the linkage shaft, and a limit extension plate for preventing the linkage shaft from entering the shell is arranged around the linkage shaft hole. The utility model discloses a linkage structure of circuit breaker, be equipped with the linkage shaft hole with the linkage of linkage shaft on the dropout lever of every circuit breaker, be equipped with around the linkage shaft hole and prevent that the universal driving shaft from getting into the inside spacing extension board of casing, at universal driving shaft assembly and circuit breaker during operation, spacing extension board prevents that the universal driving shaft from falling into the inside contact unreliability that arouses of product, when the assembly, swiftly install the universal driving shaft in the universal driving shaft hole reliably, improves the wholeness ability of product.

Description

Linkage structure of circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus field, in particular to linkage structure of circuit breaker.

Background

A circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and closing, carrying, and opening/closing a current under an abnormal circuit condition within a predetermined time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances. The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, the motor and the like, automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, has the function equivalent to the combination of a fuse type switch, an over-under-heat relay and the like, does not need to change parts after breaking fault current, and is widely applied at present.

At present, a linkage part of a linkage structure of the existing circuit breaker is easy to fall into a product, and unreliable contact is caused, so that the functional failure of the product is caused, and the life and property safety of a customer can not be ensured.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a simple structure is compact, performance safety and stability, the swift convenient linkage structure of circuit breaker of installation.

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

a linkage structure of circuit breakers comprises two circuit breakers and a linkage shaft 5 connected between the two circuit breakers, wherein the two circuit breakers are linked through the linkage shaft 5, each circuit breaker comprises a shell and an operating mechanism 2 arranged in the shell, each operating mechanism 2 comprises a tripping lever 23 and a connecting rod 22 which are pivotally connected in the shell, and the tripping lever 23 and the connecting rod 22 are connected in a hasp mode;

a linkage shaft hole 2301 linked with the linkage shaft 5 is arranged on the tripping lever 23, and a limit extension plate 232 for preventing the linkage shaft 5 from falling into a product is arranged around the linkage shaft hole 2301; a gap is formed between the limiting extension plate 232 and the side wall of the shell, and the maximum width of the gap is smaller than the diameter of the linkage shaft 5.

Further, the casing of every circuit breaker includes base 9 and the apron 8 with the base 9 lock, every circuit breaker is still including installing in inside electromagnetic system 1, explosion chamber 7 and the overload protection mechanism 10 that is used for short-circuit protection of casing, electromagnetic system 1 locates the middle part of base 9, and explosion chamber 7 is located electromagnetic system 1 under, and operating device 2 is located one side of electromagnetic system 1, and overload protection mechanism 10 is located one side of explosion chamber 7.

Further, the operating mechanism 2 further comprises a U-shaped rod 21 and a support 24, one end of the U-shaped rod 21 is linked with the handle, the other end of the U-shaped rod is connected with the connecting rod 22, the support 24 is pivotally connected inside the housing, the trip lever 23 and the connecting rod 22 are pivotally connected on the support 24, the lower end of the support 24 is provided with a contact support 25, one end of the contact support 25 is provided with a movable contact, a fixed contact arranged opposite to the movable contact is fixedly arranged in the base 9, the fixed contact is positioned on one side of the arc extinguish chamber 7, when the circuit is short-circuited, a striker of the electromagnetic system 1 pushes the trip lever 23 open to drive the trip lever 23 and the; the contact support 25 is pivotally connected with a trip hook 26, the end of the trip hook 26 is opposite to one side of the bimetallic strip of the overload protection mechanism 10, and when the circuit is overloaded, the bimetallic strip is heated and bent to touch the trip hook 26 to drive the trip lever 23 and the connecting rod 22 to trip.

Further, a first pivot hole 230 is arranged in the middle of the trip lever 23, the trip lever 23 is pivotally mounted in the housing through the first pivot hole 230, a linkage shaft hole 2301 is arranged on one side of the first pivot hole 230, the linkage shaft hole 2301 is close to one end of the housing, the limit extension plate 232 is arranged below the linkage shaft hole 2301, and the limit extension plate 232 is located on one side edge of the trip lever 23.

Further, the limit extending plate 232 includes a limit plate 2321 extending from one side of the trip lever 23 to the gap.

Further, the edge of the limiting plate 2321 protrudes towards the outside of the housing and is provided with a limiting convex rib 2322, and the limiting plate 2321 and the limiting convex rib 2322 enclose a limiting groove 2323.

Further, tripping lever 23 extends to be equipped with card arm 238, is equipped with the hasp recess 2381 with connecting rod 22 snap-fit on card arm 238, the protruding hasp arch 228 that is equipped with hasp recess 2381 snap-fit on connecting rod 22, and hasp arch 228 is equipped with cooperation groove 2281 towards the sunken one side of hasp recess 2381, and the upper end protrusion of cooperation groove 2281 is equipped with the spacing arch 2282 with the spacing cooperation of card arm 238 tip.

Further, a first rotating surface 2283 which is rotatably matched with the end of the clamping arm 238 is arranged at the bottom of the matching groove 2281, a second rotating surface 2383 which is rotatably matched with the first rotating surface 2283 is arranged on one side, facing the connecting rod 22, of the end of the clamping arm 238, and the limiting protrusion 2282 extends outwards and protrudes above the first rotating surface 2283; the first rotating surface 2283 and the second rotating surface 2383 are circular arc surfaces.

Further, the connecting rod 22 comprises a connecting rod body 221, one end of the connecting rod body 221 is provided with a connecting hole 2201 which is pivotally connected with one end of the U-shaped rod 21, the other end of the connecting rod body 221 is convexly provided with a pivoting boss 222, and the middle part of the pivoting boss 222 is provided with a second pivoting hole 2202 in a penetrating manner; the side wall of one end of the connecting rod body 221 is convexly provided with a buckle protrusion 228, one side of the buckle protrusion 228 facing the buckle groove 2381 is concavely provided with a matching groove 2281, and the upper end of the matching groove 2281 is convexly provided with a limit protrusion 2282 in limit matching with the end of the clamping arm 238.

Further, the trip lever 23 includes a lever body 231, a clamping arm 238 extends from one side of the lever body 231, the clamping arm 238 forms a V-shaped included angle with the lever body 231, a first pivot hole 230 pivotally connected to the housing is disposed at one end of the lever body 231 close to the clamping arm 238, the linkage shaft hole 2301 is disposed at one side of the first pivot hole 230, and the limiting extension plate 232 is disposed at the other end of the lever body 231.

Furthermore, through holes 101 through which the linkage shafts 5 penetrate are formed in the shells on two opposite sides of the two circuit breakers, one end of each linkage shaft 5 is connected with the linkage shaft hole 2301 of one circuit breaker, and the other end of each linkage shaft 5 is connected with the linkage piece 6 of the other circuit breaker.

The utility model discloses a linkage structure of circuit breaker, two circuit breakers pass through the universal driving shaft and realize the linkage, be equipped with the linkage shaft hole with the linkage of linkage shaft on the dropout lever of every circuit breaker, be equipped with around the linkage shaft hole and prevent that the universal driving shaft from getting into the inside spacing extension board of casing, set up spacing extension board on the dropout lever, it is spacing along with the rotation of dropout lever, at universal driving shaft assembly and circuit breaker during operation, spacing extension board prevents that the universal driving shaft from falling into the inside contact unreliable that arouses of product, when the assembly, swiftly install the universal driving shaft in the universal driving shaft hole reliably, improve the wholeness ability of product.

The middle part of the tripping lever is provided with a first pivot hole, the tripping lever is pivotally arranged in the shell through the first pivot hole, and when the linkage shaft is arranged, the limiting extension plate prevents the linkage shaft from falling into the shell. The utility model discloses limit structure includes spacing protruding muscle and spacing recess, and when the universal driving shaft installation drops, the gliding is further spacing to the universal driving shaft to spacing recess in, spacing protruding muscle, prevents the spacing recess of universal driving shaft roll-off.

In addition, the connecting rod is convexly provided with a hasp bulge matched with the hasp groove in a buckling mode, the hasp bulge is concavely provided with a matching groove towards one side of the hasp groove, the upper end of the matching groove is convexly provided with a limiting bulge matched with the end part of the clamping arm in a limiting mode, when the connecting rod and the tripping lever are assembled, the limiting bulge is matched with the clamping arm of the tripping lever in a limiting mode, and the assembling structure of the connecting rod and the tripping lever is more stable and reliable.

Drawings

Fig. 1 is a schematic diagram of the internal structure of the circuit breaker of the present invention;

fig. 2 is a schematic structural view of the limit fit between the trip lever and the connecting rod of the present invention;

fig. 3 is a schematic structural view of the connecting rod of the present invention;

fig. 4 is a schematic structural diagram of the trip lever of the present invention;

fig. 5 is a schematic structural view of a circuit breaker mounting linkage shaft of the present invention;

fig. 6 is a schematic diagram of another side of the circuit breaker connected to the linkage shaft according to the present invention.

Detailed Description

The following describes a specific embodiment of the linkage structure of the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 6. The linkage structure of the circuit breaker of the present invention is not limited to the description of the following embodiments.

At present, when a plurality of lines or a plurality of electric appliances need to be synchronously operated, circuit breakers for controlling the plurality of lines or the plurality of electric appliances need to be linked so as to synchronously operate or stop operating the plurality of lines or the plurality of electric appliances. Generally, the operating mechanisms of two circuit breakers are connected through a linkage shaft to realize synchronous opening and closing of the respective operating mechanisms. The side face of the circuit breaker is provided with an arc-shaped groove for swinging the universal driving shaft, the range of the arc-shaped groove is relatively large, the interior of a product can be seen, and when the universal driving shaft is installed, the universal driving shaft easily falls into the interior of the product to cause unreliable contact, so that the functional failure of the product is caused, and the life and property safety of a customer can not be guaranteed.

As shown in fig. 1, 2, 5 and 6, the utility model discloses linkage structure of circuit breaker, including two circuit breakers and the universal driving shaft 5 of connecting between two circuit breakers, two circuit breakers pass through the universal driving shaft 5 and link. Each circuit breaker comprises a shell and an operating mechanism 2 arranged in the shell, wherein the operating mechanism 2 comprises a tripping lever 23 and a connecting rod 22 which are pivotally connected in the shell, and the tripping lever 23 and the connecting rod 22 are in snap-fit connection; a linkage shaft hole 2301 linked with the linkage shaft 5 is arranged on the tripping lever 23, and a limit extension plate 232 for preventing the linkage shaft 5 from falling into a product is arranged around the linkage shaft hole 2301; a gap is formed between the limiting extension plate 232 and the side wall of the shell, and the maximum width of the gap is smaller than the diameter of the linkage shaft 5.

The utility model discloses a linkage structure of circuit breaker, two circuit breakers pass through the universal driving shaft and realize the linkage, be equipped with the linkage shaft hole with the linkage of linkage shaft on the dropout lever of every circuit breaker, be equipped with around the linkage shaft hole and prevent that the universal driving shaft from falling into the inside spacing extension board of product, set up spacing extension board on the dropout lever, it is spacing along with the rotation of dropout lever, at universal driving shaft assembly and circuit breaker during operation, spacing extension board prevents that the universal driving shaft from falling into the inside contact unreliable that arouses of product, when the assembly, swiftly install the universal driving shaft in the universal driving shaft hole reliably, improve the wholeness ability of product.

What has been particularly described is that, in the structure of the existing circuit breaker, after the circuit breaker is assembled, a certain gap is left between the linkage shaft hole and the side wall of the shell by the tripping lever, when the linkage shaft is not installed in the linkage shaft hole, the linkage shaft can fall into the interior of the product from the gap, and the installation efficiency of the linkage shaft is influenced.

It should be noted that, as shown in fig. 5 and 6, two circuit breakers are shown in the figures to realize linkage, obviously, the linkage is not limited to linkage of two circuit breakers, but also linkage of more multi-pole circuit breakers can be realized, linkage of two circuit breakers is only one of the most basic modes that can be realized, through holes 101 through which linkage shafts 5 pass are formed in housings on two opposite sides of two circuit breakers, one end of each linkage shaft 5 is connected with a linkage shaft hole 2301 of one circuit breaker, and the other end of each linkage shaft is connected with a linkage member 6 of the other circuit breaker. The linkage member 6 in the above embodiment may be a linkage shaft hole 2301 linked by a linkage shaft 5 provided on the trip lever 23, and the linkage member 6 may also be a linkage structure provided on another component of the operating mechanism of another circuit breaker.

As shown in fig. 1, 2, 5 and 6, the utility model discloses the overall structure of circuit breaker. The casing of every circuit breaker in the figure includes base 9 and the apron 8 with base 9 lock, and every circuit breaker still is including installing in the inside electromagnetic system 1, explosion chamber 7 and the overload protection mechanism 10 that is used for short-circuit protection of casing, and the middle part of base 9 is located to electromagnetic system 1, and explosion chamber 7 is located electromagnetic system 1 under, and operating device 2 is located one side of electromagnetic system 1, and overload protection mechanism 10 is located one side of explosion chamber 7. The utility model discloses a simple compact of internal structure of circuit breaker, the miniaturized design of the circuit breaker of being convenient for.

As shown in fig. 1-4, the present invention relates to an operating mechanism structure of a circuit breaker. The operating mechanism 2 further comprises a U-shaped rod 21 and a support 24, one end of the U-shaped rod 21 is connected with the handle, the other end of the U-shaped rod is connected with a connecting rod 22, the support 24 is pivotally connected inside the shell, the tripping lever 23 and the connecting rod 22 are pivotally connected on the support 24, a contact support 25 is installed at the lower end of the support 24, a movable contact is installed at one end of the contact support 25, a static contact which is arranged opposite to the movable contact is fixedly installed in the base 9, the static contact is located on one side of the arc extinguish chamber 7, and when a circuit is short-circuited, a striker of the electromagnetic system 1 pushes the tripping lever 23 open to drive; the contact support 25 is pivotally connected with a trip hook 26, the end of the trip hook 26 is opposite to one side of the bimetallic strip of the overload protection mechanism 10, and when the circuit is overloaded, the bimetallic strip is heated and bent to touch the trip hook 26 to drive the trip lever 23 and the connecting rod 22 to trip. The utility model discloses an operating device 2's simple structure is compact, performance safety and stability, the operating device's of being convenient for miniaturized design. The electromagnetic system provides short-circuit protection for the circuit breaker, and overload protection mechanism provides overload protection for the circuit breaker for the wholeness ability safety and stability of circuit breaker guarantees user's power consumption safety.

As shown in fig. 2-4, the structure of the trip lever of the present invention is schematically illustrated. The utility model discloses tripping lever 23 includes lever body 231, and lever body 231 extends to one side and is equipped with card arm 238, and card arm 238 forms the V-arrangement contained angle with lever body 231, and lever body 231 is close to the one end of card arm 238 and is equipped with the first pivot hole 230 with casing pivotal connection, and one side of first pivot hole 230 is located in linkage shaft hole 2301, and the other end of lever body 231 is located to above-mentioned spacing extension board 232. Linkage shaft hole 2301 is close to the one end of casing, and spacing extension board 232 locates the below in linkage shaft hole 2301, and spacing extension board 232 is located tripping lever 23's a side edge. The middle part of the trip lever 23 is provided with a first pivot hole 230, the trip lever 23 is pivotally installed in the housing through the first pivot hole 230, and when the linkage shaft is installed, the limit extension plate 232 prevents the linkage shaft from falling into the product.

As shown in fig. 2 and 4, in particular, the limiting extension plate 232 of the present invention includes a limiting plate 2321 extending from a lateral gap of the trip lever 23. Further, the edge of the limiting plate 2321 protrudes towards the outside of the housing and is provided with a limiting convex rib 2322, and the limiting plate 2321 and the limiting convex rib 2322 enclose a limiting groove 2323. The utility model discloses limit structure includes spacing protruding muscle 2322 and spacing recess 2323, and when 5 installations of universal driving shaft drop, the gliding is to spacing recess 2323 in, spacing protruding muscle 2322 is further spacing to linkage 5, prevents the spacing recess 2323 of 5 roll-offs of universal driving shaft.

As shown in fig. 3, the present invention relates to a structure of a connecting rod 22. The connecting rod 22 comprises a connecting rod body 221, one end of the connecting rod body 221 is provided with a connecting hole 2201 which is pivotally connected with one end of the U-shaped rod 21, the other end of the connecting rod body 221 is convexly provided with a pivoting boss 222, and the middle part of the pivoting boss 222 is provided with a second pivoting hole 2202 in a penetrating way; the side wall of one end of the connecting rod body 221 is convexly provided with a buckle protrusion 228, one side of the buckle protrusion 228 facing the buckle groove 2381 is concavely provided with a matching groove 2281, and the upper end of the matching groove 2281 is convexly provided with a limit protrusion 2282 in limit matching with the end of the clamping arm 238. The connecting rod 22 has a simple and compact structure, and saves the internal space of the circuit breaker.

As shown in fig. 2-4, a snap groove 2381 for snap-fitting with the connecting rod 22 is further provided on the latch arm 238, a snap protrusion 228 for snap-fitting with the snap groove 2381 is protrudingly provided on the connecting rod 22, a fitting groove 2281 is provided on one side of the snap protrusion 228 facing the snap groove 2381 in a recessed manner, and a limit protrusion 2282 for limit-fitting with the end of the latch arm 238 is protrudingly provided at the upper end of the fitting groove 2281. When the connecting rod 22 and the tripping lever 23 are assembled, the limiting projection 2282 is in limiting fit with the clamping arm 238 of the tripping lever 23, and the assembling structure of the connecting rod 22 and the tripping lever 2 is more stable and reliable. Specifically, the bottom of the fitting groove 2281 is provided with a first rotating surface 2283 which is rotatably fitted with the end of the clip arm 238, and one side of the end of the clip arm 238 facing the connecting rod 22 is provided with a second rotating surface 2383 which is rotatably fitted with the first rotating surface 2283; the first surface of revolution 2283 and the second surface of revolution 2383 are circular arc surfaces. First surface of revolution 2283 and second surface of revolution 2383 normal running fit, be the arc surface with first surface of revolution 2283 and second surface of revolution 2383, connecting rod 22 and tripping lever 23 normal running fit are more smooth and easy.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. The utility model provides a linkage structure of circuit breaker, includes two circuit breakers and connects universal driving shaft (5) between two circuit breakers, and two circuit breakers pass through universal driving shaft (5) linkage, and every circuit breaker includes the casing and installs operating device (2) in the casing, its characterized in that: the operating mechanism (2) comprises a tripping lever (23) and a connecting rod (22) which are pivotally connected in the shell, and the tripping lever (23) and the connecting rod (22) are in snap-fit connection;

a linkage shaft hole (2301) linked with the linkage shaft (5) is formed in the tripping lever (23), and a limiting extension plate (232) for preventing the linkage shaft (5) from falling into a product is arranged around the linkage shaft hole (2301); a gap is formed between the limiting extension plate (232) and the side wall of the shell, and the maximum width of the gap is smaller than the diameter of the linkage shaft (5).

2. The interlocking structure of circuit breakers according to claim 1, characterized in that: the casing of every circuit breaker include base (9) and with apron (8) of base (9) lock, every circuit breaker is still including installing in inside electromagnetic system (1), explosion chamber (7) and the overload protection mechanism (10) that are used for short-circuit protection of casing, the middle part of base (9) is located in electromagnetic system (1), and explosion chamber (7) are located electromagnetic system (1) under, and operating device (2) are located one side of electromagnetic system (1), and overload protection mechanism (10) are located one side of explosion chamber (7).

3. The interlocking structure of circuit breakers according to claim 2, characterized in that: the operating mechanism (2) further comprises a U-shaped rod (21) and a support (24), one end of the U-shaped rod (21) is connected with the handle, the other end of the U-shaped rod is connected with the connecting rod (22), the support (24) is pivotally connected inside the shell, the tripping lever (23) and the connecting rod (22) are pivotally connected to the support (24), a contact support (25) is installed at the lower end of the support (24), a movable contact is installed at one end of the contact support (25), a static contact which is opposite to the movable contact is fixedly installed in the base (9), the static contact is located on one side of the arc extinguish chamber (7), and when a circuit is short-circuited, a striker of the electromagnetic system (1) pushes the tripping lever (23) open to drive the tripping lever (23) and the connecting rod (; the contact support (25) is pivotally connected with a tripping hook (26), the end part of the tripping hook (26) is arranged opposite to one side of a bimetallic strip of the overload protection mechanism (10), and when a circuit is overloaded, the bimetallic strip is heated and bent to touch the tripping hook (26) to drive a tripping lever (23) and a connecting rod (22) to trip.

4. The interlocking structure of a circuit breaker according to any one of claims 1 to 3, characterized in that: the middle part of tripping lever (23) is equipped with first pivot hole (230), and tripping lever (23) is installed in the casing through first pivot hole (230) pivot, and linkage shaft hole (2301) are located one side of first pivot hole (230), and linkage shaft hole (2301) are close to the one end of casing, the below in linkage shaft hole (2301) is located to spacing extension board (232), and spacing extension board (232) are located tripping lever (23) one side edge.

5. The linkage structure of a circuit breaker according to claim 4, wherein: the limiting extension plate (232) comprises a limiting plate (2321) which is arranged on one side of the tripping lever (23) in a manner of extending towards the gap.

6. The linkage structure of a circuit breaker according to claim 5, wherein: the edge of the limiting plate (2321) protrudes towards the outside of the shell and is provided with a limiting convex rib (2322), and the limiting plate (2321) and the limiting convex rib (2322) jointly enclose a limiting groove (2323).

7. The interlocking structure of a circuit breaker according to any one of claims 1 to 3, characterized in that: trip lever (23) extend and are equipped with card arm (238), be equipped with on card arm (238) with connecting rod (22) snap-fit's hasp recess (2381), the protrusion is equipped with on connecting rod (22) with hasp recess (2381) snap-fit's hasp arch (228), hasp arch (228) are equipped with cooperation groove (2281) towards the one side of hasp recess (2381) sunken, the upper end protrusion of cooperation groove (2281) be equipped with the spacing complex of card arm (238) tip spacing protruding (2282).

8. The linkage structure of a circuit breaker according to claim 7, wherein: the bottom of the matching groove (2281) is provided with a first rotating surface (2283) in rotating fit with the end of the clamping arm (238), one side, facing the connecting rod (22), of the end of the clamping arm (238) is provided with a second rotating surface (2383) in rotating fit with the first rotating surface (2283), and the limiting protrusion (2282) extends outwards and protrudes above the first rotating surface (2283); the first rotating surface (2283) and the second rotating surface (2383) are arc surfaces.

9. The interlocking structure of a circuit breaker according to any one of claims 1 to 3, characterized in that: the connecting rod (22) comprises a connecting rod body (221), one end of the connecting rod body (221) is provided with a connecting hole (2201) which is in pivot connection with one end of the U-shaped rod (21), the other end of the connecting rod body (221) is convexly provided with a pivot boss (222), and the middle part of the pivot boss (222) is provided with a second pivot hole (2202) in a penetrating manner; the one end lateral wall protrusion of connecting rod body (221) is equipped with hasp arch (228), and hasp arch (228) are equipped with cooperation groove (2281) towards the one side of hasp recess (2381) sunken, and the upper end protrusion in cooperation groove (2281) is equipped with spacing protruding (2282) of the spacing cooperation of card arm (238) tip.

10. The interlocking structure of a circuit breaker according to any one of claims 1 to 3, characterized in that: the tripping lever (23) comprises a lever body (231), a clamping arm (238) extends towards one side of the lever body (231), a V-shaped included angle is formed between the clamping arm (238) and the lever body (231), a first pivot hole (230) which is in pivot connection with the shell is formed in one end, close to the clamping arm (238), of the lever body (231), the linkage shaft hole (2301) is formed in one side of the first pivot hole (230), and the limiting extension plate (232) is formed in the other end of the lever body (231).

11. The interlocking structure of a circuit breaker according to any one of claims 1 to 3, characterized in that: the shell of the two opposite sides of the two circuit breakers is provided with a through hole (101) through which the linkage shaft (5) passes, one end of the linkage shaft (5) is connected with a linkage shaft hole (2301) of one circuit breaker, and the other end of the linkage shaft is connected with a linkage piece (6) of the other circuit breaker.