Leakage protection unit

Abstract

The utility model provides an electric leakage protection unit, the electric leakage protection unit comprises an electric leakage tripping mechanism and a transmission assembly in transmission cooperation with an operating mechanism, the electric leakage tripping mechanism comprises a base installed in a second cavity, an electromagnetic tripper, a tripping rod, a buckle plate, a spring seat, a positioning member and a reset member, the base is provided with a first connecting column which is pivoted and matched with the tripping rod, the base is provided with a second connecting column which is pivoted and matched with the reset piece and is positioned below the first connecting column, the tripping rod is provided with a first limiting groove, and the reset piece is sleeved with a second connecting column which is pivoted and matched with the reset piece and has one end which is positioned in the first limiting groove and abuts against the inner wall of the first limiting groove; and the other end of the first torsion spring abuts against the end part of the reset piece. According to the utility model, the operating mechanism of the circuit breaker is stable, closing is convenient, and each part in the leakage tripping mechanism is uniformly stressed and tripped stably.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field, concretely relates to a leakage protection unit. BACKGROUND

[0002] The leakage protection circuit breaker has overload, short circuit and leakage protection function, that is, has the function of circuit breaker and the function of leakage protector. Therefore, the leakage protection circuit breaker is the commonly used protection equipment in electrical circuit, and is widely used in mobile electrical equipment and handheld electric power tools, electrical equipment installed in humid, strong corrosive and other harsh places, electrical construction machinery and equipment of construction site, socket circuit in school, enterprise, residential building, underwater lighting equipment of swimming pool, fountain, bath, power supply line and equipment installed in water, electrical medical equipment directly contacting human body in hospital. The circuit breaker has multiple situations such as opening caused by overload, short circuit or leakage, therefore, even if the leakage circuit breaker is in the open state, the user cannot clearly judge whether the opening is caused by leakage, therefore, it brings certain difficulty to subsequent maintenance and operation, and brings some influence to use.

[0003] In order to solve the above problems, the existing leakage protection circuit breaker has a leakage indication function, which realizes the closing of the circuit breaker and the leakage release part through a set of operating mechanism, so that the action force on the trip and the lock of the operating mechanism is too large, the locking part is easy to wear and tear, and the stress is uneven, which requires high material and difficult processing, and is easy to fail in use, thereby resulting in low product stability. The Chinese patent with the patent number CN201420392245.9 and the patent name "Leakage Circuit Breaker" discloses a "leakage circuit breaker, comprising a housing (1), an operating mechanism, a contact mechanism and a leakage release (2), the operating mechanism cooperates with the contact mechanism, the operating mechanism comprises a trip, a lock (3), characterized in that: further comprising a leakage indication mechanism, the leakage indication mechanism comprises an arm (4), a lever (5) and an indication button (6), the indication button (6) is slidably installed in the housing (1), the indication button (6) comprises a first position extending out of the housing (1) and a second position buried in the housing (1), the arm (4) is hinged below the indication button (6) and comprises a stress end (41) and a pushing end (42), the pushing end (42) is in contact with the lower end of the indication button (6), the arm (4) is connected with a first elastic element (7), the lever (5) is hinged in the housing (1) and comprises a pressing end (51) and a clamping end (52), one side of the pressing end (51) corresponds to the leakage release (2), and the other side is in pressing cooperation with the stress end (41), the clamping end (52) is in clamping cooperation with the indication button (6), the lever (5) is connected with a second elastic element (8), the leakage release (2) pushes the pressing end (51) to rotate and press the stress end (41) to rotate and drive the clamping end (52) to rotate and disengage from the indication button (6), the stress end (41) rotates to drive the pushing end (42) to push the indication button (6) upward to pop out to form the first position, pressing the indication button (6) downward to slide and clamp the clamping end (52) and press the pushing end (42) to drive the stress end (41) to rotate and correspond to the pressing end (51) to form the second position, and the arm (4) cooperates with the lock (3)." When the circuit breaker is closed, the leakage release needs to be closed by pressing the indication button (6), which is troublesome and inconvenient. Utility model content

[0004] Based on the above problems, the purpose of the present application is to provide a leakage protection unit which can stabilize the circuit breaker operating mechanism, close conveniently, and make the stress of each part in the leakage release mechanism uniform and stable.

[0005] In view of the above problems, the technical scheme is provided as follows: a leakage protection unit, comprising a leakage tripping mechanism and a transmission assembly cooperating with a circuit breaker operating mechanism to control the closing or opening of the leakage tripping mechanism, the leakage tripping mechanism comprising a base installed in a second cavity of a circuit breaker housing, an electromagnetic tripper, a tripping rod, a clamping plate, a spring seat, a positioning piece and a reset piece, the base being provided with a first connecting column pivotally connected with the tripping rod, the base being provided with a second connecting column pivotally connected with the reset piece below the first connecting column, the tripping rod being provided with a first limiting groove, the reset piece being provided with a first torsion spring sleeved thereon, one end of the first torsion spring being located in the first limiting groove and abutting against the outer wall of the second connecting column, the other end of the first torsion spring abutting against the end of the reset piece, one end of the third connecting column being provided on the base close to a handle, the third connecting column being provided with a second torsion spring sleeved thereon, one end of the second torsion spring abutting against the upper end of the tripping rod, the other end of the second torsion spring abutting against the inner wall of the base, the base being provided with a boss, the spring seat being provided with a positioning groove matched with the boss, the base being provided with a fourth connecting column and a fifth connecting column penetrating through the spring seat and located at two ends thereof respectively, the base being provided with a connecting shaft penetrating therethrough, the clamping plate being pivotally connected to the connecting shaft, the clamping plate being provided with an abutting end limited to the tripping rod, the spring seat being provided with a mounting groove, the mounting groove being provided with a pressure relief spring mounted therein, one end of the pressure relief spring abutting against the inner wall of the mounting groove, the other end of the pressure relief spring abutting against the clamping plate, the base being provided with a sixth connecting column pivotally connected with the positioning piece below the spring seat, the clamping plate being provided with a second limiting groove matched with the end of the positioning piece, one side of the clamping plate facing the transmission assembly being provided with a transmission head limited to the transmission assembly, the reset piece being provided with a transmission foot transmitted with the transmission assembly.

[0006] The transmission assembly comprises a transmission handle coaxially arranged with the handle of the circuit breaker operating mechanism and pivoted in the circuit breaker housing, a connecting rod connected with the transmission handle, a jump buckle connected with the other end of the connecting rod, a rotating frame pivoted on the connecting shaft, a lock buckle pivoted on the rotating frame and matched with the jump buckle for limiting, a third torsional spring sleeved on the transmission handle for resetting after the transmission handle rotates, a stroke groove matched with the lock buckle is formed on the side of the transmission head, a protruding column is arranged on the rotating frame, a fourth torsional spring for limiting the lock buckle is sleeved on the protruding column, a hanging hole is formed on the rotating frame, a fixed shaft is inserted in the second cavity on the circuit breaker housing, a pull spring is connected on the fixed shaft, the other end of the pull spring is hooked in the hanging hole, the pull spring is located in the opening direction of the circuit breaker movable contact, a communication groove is formed on the base, a limiting block is arranged on the rotating frame and passes through the communication groove to the side of the buckle plate, a driving groove matched with the transmission foot is formed on the limiting block, the both ends of the positioning piece are respectively matched with the rotating frame and the buckle plate for limiting, an arc-shaped groove coaxially arranged with the transmission handle and communicating the first cavity and the second cavity is formed in the housing, a driving rod passing through the arc-shaped groove and driving the transmission handle to rotate is connected on the handle, and a pushing opening matched with the driving rod is formed on the outer circumferential wall of the transmission handle and opens towards the opening direction of the circuit breaker movable contact.

[0007] In the above structure, in the state of closing of the circuit breaker, the pressure relief spring is in a compressed state and stores energy, and the thrust generated thereby can make the clamping plate firmly abut against the trip lever through the abutting end, the trip lever is limited through the elastic force of the second torsion spring, the lock catch cooperates with the jump catch to limit the rotating frame, the rotating frame cooperates with the transmission foot through the driving groove to limit the reset member, and the first torsion spring is in an energy storage state; when the electric leakage occurs, the electromagnetic trip operates, the trip end thereof instantaneously pushes the trip lever to swing relative to the first connecting column, the clamping plate swings relative to the connecting shaft, the abutting end is separated from the trip lever to realize tripping, the tripping of the clamping plate makes the pressure relief spring release the stored energy, the transmission head cooperates with the stroke groove to make the lock catch and the jump catch be tripped, the tension spring pulls the rotating frame to move in the direction of opening, and simultaneously the rotating frame pushes the lock catch to push the operating mechanism to trip and realize the opening of the circuit breaker, and the electric leakage tripping mechanism plays a role of electric leakage protection. When the circuit breaker is opened, the driving groove of the rotating frame is separated from the transmission foot of the reset member to release the limitation, the reset member is rapidly swung relative to the second connecting column through the torsional force released after the energy storage of the first torsion spring, and then the trip end of the electromagnetic trip is pushed to reset in order to extend the trip next time. The clamping plate pushes the positioning member relative to the sixth connecting column through the bottom end of the rotating frame, and the clamping plate is pushed to reset through the second limiting groove in order to be locked and limited with the trip lever next time. The operating mechanism comprises a support for mounting the movable contact, a linkage catch mounted on the support, a linkage rod connecting the handle and the linkage catch, and a locking block cooperating with the linkage catch to be locked or tripped. Through the cooperation of the clamping plate, the trip lever, the spring seat, the positioning member and the reset member, the force acting on the transmission assembly during closing and opening can be reduced, and the force can be distributed to each component, so that the force is more uniform, thereby improving the structural strength of the electric leakage tripping mechanism and the transmission assembly, reducing the processing difficulty of production, and improving the reliability and stability of the electric leakage tripping mechanism. By arranging the transmission assembly, the electric leakage protection unit can form a unit that can be closed and opened separately, thereby reducing the force acting on the operating mechanism during the opening and closing of the circuit breaker, thereby reducing the locking force between the jump catch and the lock catch and between the linkage catch and the locking block, and improving the structural stability and operating life of the utility model. The utility model can drive the closing of the operating mechanism and the electric leakage protection unit through one handle, and the electric leakage protection unit does not need to be closed through secondary operation, thereby improving the convenience of operation of the utility model. When the handle is closed in the utility model, the force acting on the operating mechanism and the electric leakage protection unit can be distributed to the handle through the driving rod, the linkage rod, the connecting rod and the transmission handle, thereby reducing the force acting on the linkage catch and the locking block when they are locked, preventing the locking part from being easily worn, making the force acting on the locking part uniform, reducing the requirements of the linkage catch and the locking block on the material, improving the production precision, and thereby reducing the production cost of the utility model.The first connecting column can facilitate installation and swing of the tripping lever, the second connecting column can facilitate installation and swing of the reset member, and the first torsional spring can be installed in abutting connection with the first connecting column to store energy, thereby improving stability of the structure and reliability of the tripping end reset of the tripping device. The third connecting column and the fourth connecting column can facilitate installation of the spring seat, thereby improving stability of the spring seat and reliability of energy storage of the pressure relief spring. The installation groove can facilitate installation of the pressure relief spring, thereby improving stability of the pressure relief spring. The pressure relief spring can store energy when the circuit breaker is closed, and the tripping lever and the locking plate can be in abutting and limiting connection, and the elastic force released by the pressure relief spring can push the locking plate to drive the tripping latch and the locking latch to be tripped when the leakage tripping mechanism is opened, thereby improving reliability of opening of the leakage tripping mechanism. The first torsional spring can reset the tripping end of the tripping device in cooperation with the reset member, and the second torsional spring can limit and reset the tripping lever, thereby improving reliability of the leakage tripping mechanism. The transmission head and the transmission foot can facilitate transmission and cooperation of the leakage tripping mechanism and the transmission assembly, thereby improving transmission reliability between various components of the leakage tripping mechanism. The boss and the positioning groove can facilitate positioning and installation of the spring seat, thereby improving assembly convenience of the leakage tripping mechanism. The stroke groove and the driving groove can facilitate cooperation with the transmission head and the transmission foot respectively, and the communication groove can make the structure of the leakage tripping mechanism more compact, thereby improving structural strength of the leakage tripping mechanism and reliability of the leakage tripping mechanism. The transmission handle arranged in the second cavity can reduce the volume, thereby reasonably utilizing the space in the second cavity, reducing the volume of the leakage tripping mechanism, making the structure more compact, and improving structural strength and reliability of the leakage tripping mechanism.

[0008] The base is further provided with a positioning shaft in pivotal connection with the transmission handle.

[0009] In the above structure, the positioning shaft can improve stability of the transmission handle, thereby improving stress intensity and stability of the leakage tripping mechanism.

[0010] The locking latch is further provided with a guide block on a side facing the circuit breaker operating mechanism, and the guide block is provided in an open manner towards the opening direction of the movable contact.

[0011] With the above structure, when the operating mechanism is closed, the driving rod cooperates with the pushing port to push the transmission handle to rotate, so that the closing is realized, when the circuit breaker is tripped to open except for the leakage, the reset of the operating mechanism cannot reset the leakage tripping mechanism, so that the inspector can distinguish that the opening of the circuit breaker is not caused by the leakage, and the inspector can diagnose conveniently, when the leakage protection unit detects the leakage and trips, the guide block can cooperate with the transmission rod in the operating mechanism to make the linkage buckle of the operating mechanism decouple from the lock block, so that the circuit breaker is opened, and the reliability of the circuit breaker is improved.

[0012] The utility model further sets up, the top of rotation frame is equipped with the indication area, the indication area sets up two kinds of mark corresponding closing and opening.

[0013] In the above structure, the housing is provided with an indication port corresponding to the indication area, which can help the inspector to identify the current closing or opening state of the leakage tripping mechanism, and can help the maintenance personnel to observe whether the opening of the circuit breaker is caused by the leakage, thereby improving the convenience of use and maintenance of the utility model.

[0014] The utility model further sets up, the bottom of rotation frame is the limit end with the cooperation of the positioning piece, the limit end is equipped with the electricity head with the circuit breaker terminal electricity connection, the limit end is equipped with the fifth torsional spring that limits the electricity head.

[0015] With the above structure, the power supply at one end of the circuit breaker can be connected when the circuit breaker is closed, so as to supply power to the test circuit, thereby improving the reliability of the utility model.

[0016] The utility model further sets up, the bottom of tripping lever is provided with the receiving block corresponding to the tripping end towards the reset piece.

[0017] With the above structure, the pushing area of the tripping lever pushed by the tripping end of the tripping device can be increased, thereby improving the reliability of the tripping of the utility model.

[0018] The utility model further sets up, the one end of buckle plate towards spring seat is equipped with the positioning end, the positioning head that is equipped with the pressure relief spring cooperation is located on the positioning end.

[0019] With the above structure, the stability of the installation of the pressure relief spring can be improved, thereby improving the reliability of the utility model.

[0020] The utility model further sets up, the notch is set up in the rotation frame, one end of connecting rod and jump buckle is through jump buckle to the notch. With the above structure, the connecting rod can be limited, thereby the connecting strength between the connecting rod and the jump buckle can be improved, and the reliability of the utility model is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Structure diagram of the utility model in the shell Figure One .

[0022] Figure 2 Structure diagram of the utility model in the shell Figure Two .

[0023] Figure 3 Structure diagram of the utility model in the shell Figure One .

[0024] Figure 4 Structure diagram of the utility model Figure One .

[0025] Figure 5 Structure diagram of the utility model Figure Two .

[0026] Figure 6 Structure diagram of the utility model Figure Three .

[0027] Figure 7 Structure diagram of the utility model in the leakage release mechanism part structure.

[0028] Figure 8 Structure diagram of the utility model in the transmission assembly part structure.

[0029] Figure 9 Structure diagram of the utility model in the transmission assembly and operating handle.

[0030] Figure 10 Structure diagram of the utility model in the leakage release mechanism.

[0031] Figure 11 Structure diagram of the utility model in the base Figure One .

[0032] Figure 12 Structure diagram of the utility model in the spring seat.

[0033] Figure 13 Structure diagram of the utility model in the rotating frame Figure One .

[0034] Figure 14 Structure diagram of the utility model in the rotating frame Figure Two .

[0035] Figure 15 Structure diagram of the utility model in the buckle plate.

[0036] Figure 16Structure diagram of the base in the utility model Figure Two .

[0037] Figure 17 Structure diagram of the second cover of the circuit breaker in the utility model.

[0038] Figure 18 Structure diagram of the circuit breaker shell in the utility model.

[0039] Figure 19 Structure diagram of the inside of the circuit breaker shell in the utility model Figure Two .

[0040] Figure 20 Structure diagram of the operating mechanism of the circuit breaker in the utility model.

[0041] Label meaning in the figure: 1 - shell; 2 - operating device; 21 - handle; 22 - operating mechanism; 11 - first chamber; 12 - second chamber; 13 - first cover; 14 - second cover; 3 - electric leakage release mechanism; 4 - transmission assembly; 31 - base; 32 - electromagnetic release; 33 - release lever; 34 - buckle plate; 35 - spring seat; 36 - positioning piece; 37 - reset piece; 311 - first connecting column; 312 - second connecting column; 331 - first limiting groove; 01 - first torsional spring; 313 - third connecting column; 02 - second torsional spring; 314 - boss; 351 - positioning groove; 315 - fourth connecting column; 316 - fifth connecting column; 03 - connecting shaft; 341 - abutting end; 352 - mounting groove; 04 - pressure relief spring; 317 - sixth connecting column; 342 - second limiting groove; 343 - transmission head; 371 - transmission foot;

[0042] 41 - transmission handle; 42 - connecting rod; 43 - jump buckle; 44 - rotating frame; 45 - lock buckle; 46 - third torsional spring; 451 - stroke groove; 441 - convex column; 05 - fourth torsional spring; 442 - hanging hole; 06 - fixed shaft; 07 - tension spring; 318 - communication groove; 443 - limiting block; 4431 - driving groove; 452 - guide block; 411 - pushing port; 444 - indication area; 15 - indication port; 445 - limiting end; 5 - power connection head; 08 - fifth torsional spring; 211 - driving rod; 310 - positioning shaft;

[0043] 332 - bearing block; 344 - positioning end; 345 - positioning head; 446 - notched portion; 319 - connecting head; 141 - positioning shaft sleeve; 221 - support; 222 - linkage buckle; 223 - linkage lever; 224 - locking block; 225 - transmission lever. DETAILED DESCRIPTION

[0044] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0045] It should be noted that all directional indications (such as upper, lower, left, right, front, back, back surface, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0046] As Figures 1 to 20The utility model provides an electromagnetic type electric leakage protection circuit breaker, including casing 1, casing cover, short circuit protection unit, arc extinguishing device, test device, contact assembly and operating device 2 for realizing circuit breaker opening or closing, operating device 2 includes handle 21 and operating mechanism 22 with handle 21 linkage, contact assembly includes moving contact and static contact, moving contact is connected with operating mechanism 22, static contact is installed in casing 1 and is opposite with moving contact arrangement, it is characterized in that: the both sides of casing 1 are equipped with first chamber 11, second chamber 12 respectively, the casing cover is equipped with two groups, and the first cover 13 of adapting with first chamber 11 and the second cover 14 of adapting with second chamber 12, still include electric leakage protection unit, electric leakage protection unit includes electric leakage release mechanism 3 and transmission assembly 4 with operating mechanism 22 transmission cooperation control electric leakage release mechanism 3 closing or opening, electric leakage release mechanism 3 includes the base 31 of installing in second chamber 12, electromagnetic release 32, release rod 33, buckle plate 34, spring seat 35, positioning part 36 and reset part 37, the first connecting column 311 of pivoted cooperation with release rod 33 is equipped on the base 31, the second connecting column 312 of pivoted cooperation with reset part 37 is equipped on the base 31 below first connecting column 311, the first limit slot 331 is opened in release rod 33, the first torsional spring 01 of one end in first limit slot 331 with the outer wall of second connecting column 312 is abutted, the other end is abutted on the end of reset part 37, the third connecting column 313 is equipped on the one end of base 31 close to handle 21, the second torsional spring 02 of one end abutted on release rod 33 upper end, the other end abutbed on the inner wall of base 31 is sleeved on the third connecting column 313, the boss 314 is equipped on the base 31, the positioning slot 351 of adapting with boss 314 is opened in spring seat 35, the fourth connecting column 315, the fifth connecting column 316 of setting through spring seat 35 respectively are equipped on the base 31 both ends, the connecting shaft 03 is penetrated in the base 31, the buckle plate 34 is pivoted on connecting shaft 03, the abutted end 341 of limiting cooperation with release rod 33 is equipped on the buckle plate 34, the installation slot 352 is opened in spring seat 35, the pressure relief spring 04 is installed in installation slot 352, the pressure relief spring 04 one end abutted on the inner wall of installation slot 352, the other end abutted on the buckle plate 34, the sixth connecting column 317 of pivoted cooperation with positioning part 36 is equipped on the base 31 below spring seat 35, the second limit slot 342 of cooperation with the end of positioning part 36 is opened in the buckle plate 34, the transmission head 343 of limiting cooperation with transmission assembly 4 is equipped on the side of buckle plate 34 towards transmission assembly 4, the transmission foot 371 of transmission cooperation with transmission assembly 4 is equipped on reset part 37,

[0047] The transmission assembly 4 comprises a transmission handle 41 coaxially arranged with the handle 21 and pivoted in the housing 1, a connecting rod 42 connected with the transmission handle 41, a jump buckle 43 connected with the other end of the connecting rod 42, a rotating frame 44 pivoted on the connecting shaft 03, a lock buckle 45 pivoted on the rotating frame 44 and matched with the jump buckle 43 for limiting, a third torsional spring 46 sleeved on the transmission handle 41 for resetting after the transmission handle 41 rotates, a stroke groove 451 matched with the lock buckle 45 is formed on one side of the transmission head 343, a protruding column 441 is arranged on the rotating frame 44, a fourth torsional spring 05 is sleeved on the protruding column 441 for limiting the lock buckle 45, a hanging hole 442 is formed on the rotating frame 44, a fixed shaft 06 is inserted in the second cavity 12 of the housing 1, a pull spring 07 is connected on the fixed shaft 06, the other end of the pull spring 07 is hooked in the hanging hole 442, the pull spring 07 is located in the moving contact opening direction, a communication groove 318 is formed on the base 31, a limiting block 443 is arranged on the rotating frame 44 and passes through the communication groove 318 to one side of the buckle plate 34, a driving groove 4431 matched with the transmission foot 371 is formed on the limiting block 443, the positioning piece 36 is matched with the rotating frame 44 and the buckle plate 34 at both ends for limiting, an arc-shaped groove coaxially arranged with the transmission handle 41 and communicating the first cavity 11 and the second cavity 12 is formed in the housing 1, a driving rod 211 connected on the handle 21 passes through the arc-shaped groove to drive the transmission handle 41 to rotate, and a pushing opening 411 matched with the driving rod 211 is formed on the outer circumferential wall of the transmission handle 41 and opens towards the opening direction.

[0048] In the structure, when the circuit breaker is closed, the pressure relief spring 04 is in a compressed state and stores energy, and the thrust generated thereby can cause the clamping plate 34 to abut against the trip lever 33 through the abutting end 341, the trip lever 33 is limited by the elastic force of the second torsional spring 02, the lock catch 45 cooperates with the jump catch 43 to limit the rotating frame 44, the rotating frame 44 cooperates with the transmission foot 371 through the driving groove 4431 to limit the reset member 37, and the first torsional spring 01 is in a state of storing energy; when an electric leakage occurs, the electromagnetic trip unit 32 is started, the trip end thereof instantaneously pushes the trip lever 33 to swing relative to the first connecting column 311, so that the clamping plate 34 swings relative to the connecting shaft 03, the abutting end 341 is separated from the trip lever 33 to realize tripping, the tripping of the clamping plate 34 causes the pressure relief spring 04 to release the stored energy, the transmission head 343 cooperates with the stroke groove 451 to cause the lock catch 45 to be tripped from the jump catch 43, and the jump catch 43 pulls the rotating frame 44 to move in the direction of opening, and at the same time, the rotating frame 44 pushes the lock catch 45 to trip the operating mechanism 22 to realize the opening of the circuit breaker, and the electric leakage tripping mechanism 3 plays a role in electric leakage protection. When the circuit breaker is opened, the driving groove 4431 of the rotating frame 44 is separated from the transmission foot 371 of the reset member 37, so that the reset member 37 is quickly swung relative to the second connecting column 312 by the torsional force released after storing energy by the first torsional spring 01, and then pushes the trip end of the electromagnetic trip unit 32 to reset, so as to extend the trip next time. The clamping plate 34 pushes the positioning member 36 relative to the sixth connecting column 317 through the bottom end of the rotating frame 44, and the clamping plate 34 is pushed to reset through the second limiting groove 342, so as to be locked and limited with the trip lever 33 next time. The operating mechanism 22 includes a support 221 for mounting a movable contact, a linkage catch 222 mounted on the support 221, a linkage rod 223 connecting the handle 21 and the linkage catch 222, and a locking block 224 cooperating with the linkage catch 222 to lock or trip. Through the cooperation of the clamping plate 34, the trip lever 33, the spring seat 35, the positioning member 36 and the reset member 37, the force acting on the transmission assembly 4 during closing and opening can be reduced, and the force can be distributed to each component, so that the force is more uniform, thereby improving the structural strength of the electric leakage tripping mechanism 3 and the transmission assembly 4, reducing the processing difficulty of production, and improving the reliability and stability of the electric leakage tripping mechanism 3. By arranging the transmission assembly 4, the electric leakage protection unit can be formed as a unit that can be closed and opened separately, thereby reducing the force acting on the operating mechanism 22 during the opening and closing of the circuit breaker, thereby reducing the locking force between the jump catch 43 and the lock catch 45 and between the linkage catch 222 and the locking block 224, and improving the structural stability and operating life of the utility model.The utility model discloses a handle 21 can drive operating mechanism 22 and the closing of leakage protection unit, need not through secondary operation and make the closing of leakage protection unit, improved the convenient of the utility model operation, and when the utility model closes through handle 21, can divide the force that operating mechanism 22 and leakage protection unit received through driving rod 211, linkage lever 223, connecting rod 42, transmission handle 41 to handle 21, further reduced the operating mechanism 22's linkage buckle 222 and the force that lock block 224 buckled when received, make its lock place not easy to wear and tear, and the force that lock place received is even, can reduce the requirement of linkage buckle 222 and lock block 224 to material, production accuracy, thereby reduced the production cost of the utility model.

[0049] In the embodiment, the base 31 is provided with a positioning shaft 310 pivotally connected with the transmission handle 41.

[0050] In the above structure, the positioning shaft 310 can improve the stability of the transmission handle 41, thereby improving the stress strength and the stability of the utility model.

[0051] In the embodiment, the lock catch 45 is provided with a guide block 452 protruding from the side of the operating mechanism 22, and the guide block 452 is open to the opening direction of the movable contact.

[0052] In the above structure, when the operating mechanism 22 is closed, the driving rod 211 cooperates with the pushing port 411 to push the transmission handle 41 to rotate, thereby achieving the closing. When the circuit breaker is tripped and opened due to reasons other than the leakage, the reset of the operating mechanism 22 will not reset the leakage tripping mechanism 3, so that the inspector can distinguish that the opening of the circuit breaker is not caused by the leakage, and the inspector can diagnose conveniently. When the leakage protection unit detects the leakage and trips, the guide block 452 can cooperate with the transmission rod in the operating mechanism 22 to make the linkage catch 222 of the operating mechanism 22 decouple from the locking block 224, thereby making the utility model open, and improving the reliability of the utility model.

[0053] In the embodiment, the top end of the rotating frame 44 is provided with an indication area 444, the shell 1 is provided with an indication port 15 corresponding to the indication area 444, and the indication area 444 is provided with two kinds of marks corresponding to the closing and opening.

[0054] In the above structure, the inspector can distinguish the current closing or opening state of the leakage tripping mechanism 3, and the maintenance personnel can observe whether the opening of the circuit breaker is caused by the leakage, thereby improving the convenience of use and maintenance of the utility model.

[0055] In the embodiment, the bottom end of the rotating frame 44 is a limiting end 445 cooperating with the positioning piece 36, the limiting end 445 is provided with an electric head 5 electrically connected with the wiring terminal of the circuit breaker, and the limiting end 445 is provided with a fifth torsional spring 08 limiting the electric head 5.

[0056] In the above structure, the circuit breaker can be connected to the power supply at one end when the circuit breaker is closed, so as to supply power to the test circuit, thereby improving the reliability of the utility model.

[0057] In the embodiment, the bottom end of the tripping rod 33 protrudes from the reset piece 37 and is provided with a receiving block 332 corresponding to the tripping end.

[0058] In the above structure, the pushing area of the tripping rod 33 pushed by the tripping end of the tripping device can be increased, thereby improving the reliability of the tripping of the utility model.

[0059] In the embodiment, the buckle plate 34 is provided with a positioning end 344 at one end of the spring seat 35, and the positioning end 344 is provided with a positioning head 345 matched with the pressure relief spring 04.

[0060] With the above structure, the stability of the installation of the pressure relief spring 04 can be improved, thereby improving the reliability of the utility model.

[0061] In the embodiment, the rotating frame 44 is provided with a notch 446, and one end of the connecting rod 42 connected with the jump buckle 43 passes through the jump buckle 43 to the notch 446.

[0062] With the above structure, the connecting rod 42 can be limited, thereby improving the connecting strength between the connecting rod 42 and the jump buckle 43, and improving the reliability of the utility model.

[0063] In the embodiment, the first connecting column 311, the second connecting column 312, the third connecting column 313, the fourth connecting column 315 and the fifth connecting column 316 are all provided with connecting heads 319 at the end portions, the spring seat 35 is provided with a cover plate matched with the connecting heads 319, and the cover plate is provided with an observation port at a position corresponding to the pressure relief spring 04.

[0064] With the above structure, the stability of the structure of the electric leakage tripping mechanism 3 can be further improved, and each part can be limited, thereby improving the structural strength of the utility model. The observation port can facilitate the installation of the pressure relief spring 04 by the installer, thereby improving the convenience of the assembly of the utility model.

[0065] In the embodiment, the inside of the second cover 14 is provided with a positioning shaft sleeve 141 matched with the connecting shaft 03.

[0066] In the above structure, the positioning shaft sleeve 141 can improve the stability of the connecting shaft 03, thereby improving the reliability of the utility model.

[0067] The above is only the preferred embodiment of the utility model, and it should be noted that for ordinary skilled persons in the technical field, some improvements and modifications can be made without departing from the technical principles of the utility model, and the above-mentioned improvements and modifications should be regarded as the protection scope of the utility model.

Claims

1. An arc fault protection unit, comprising: The leakage protection unit comprises a leakage tripping mechanism and a transmission assembly cooperating with the handle of the circuit breaker operating mechanism to control the closing or opening of the leakage tripping mechanism, the leakage tripping mechanism comprises a base installed in a second chamber of the circuit breaker housing, an electromagnetic tripper, a tripping rod, a clamping plate, a spring seat, a positioning member and a reset member, the base is provided with a first connecting column pivotally connected with the tripping rod, the base is provided with a second connecting column pivotally connected with the reset member below the first connecting column, the tripping rod is provided with a first limiting groove, the reset member is provided with a first torsion spring having one end located in the first limiting groove and abutting against the outer wall of the second connecting column and the other end abutting against the end of the reset member, one end of the third connecting column of the base abutting against the upper end of the tripping rod and the other end abutting against the second torsion spring on the inner wall of the base, the base is provided with a boss, the spring seat is provided with a positioning groove matched with the boss, the base is provided with a fourth connecting column and a fifth connecting column penetrating through the spring seat and located at both ends of the spring seat respectively, the base is provided with a connecting shaft penetrating through the base, the clamping plate is pivotally connected with the connecting shaft, the clamping plate is provided with an abutting end limiting matched with the tripping rod, the spring seat is provided with a mounting groove, the mounting groove is provided with a pressure relief spring, one end of the pressure relief spring abutting against the inner wall of the mounting groove and the other end abutting against the clamping plate, the base is provided with a sixth connecting column pivotally connected with the positioning member below the spring seat, the clamping plate is provided with a second limiting groove matched with the end of the positioning member, one side of the clamping plate facing the transmission assembly is provided with a transmission head limiting matched with the transmission assembly, the reset member is provided with a transmission foot transmitting matched with the transmission assembly.

2. The ground fault protection unit of claim 1, wherein: The base is provided with a positioning shaft pivotally connected with the transmission handle.

3. The ground fault protection unit of claim 1, wherein: The lock catch is provided with a guide block protruding towards the side of the circuit breaker operating mechanism, and the guide block is provided with an opening towards the opening direction of the movable contact.

4. An electrical leakage protection unit according to claim 3, wherein: The top end of the rotating frame is provided with an indication area, which is provided with two kinds of marks corresponding to closing and opening.

5. The ground fault protection unit of claim 1, wherein: The bottom end of the rotating frame is a limiting end matched with the positioning member, the limiting end is provided with an electric head electrically connected with the circuit breaker terminal, and the limiting end is provided with a fifth torsional spring for limiting the electric head.

6. The ground fault protection unit of claim 1, wherein: The bottom end of the tripping lever is provided with a receiving block corresponding to the tripping end and protruding towards the reset member.

7. The ground fault protection unit of claim 1, wherein: The end of the buckle plate towards the spring seat is provided with a positioning end, and the positioning end is provided with a positioning head matched with the pressure relief spring.

8. The ground fault protection unit of claim 1, wherein: The rotating frame is provided with a notch, and one end of the connecting rod connected with the jump buckle passes through the jump buckle to the notch.

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