Operating mechanism of circuit breaker and assembling method

Abstract

The application relates to the field of low-voltage electrical apparatus, in particular to an operating mechanism of a circuit breaker, wherein two ends of a first spring are respectively connected with a rocker assembly and a first crank through a first spring shaft and a second spring shaft in rotation, one end of a jump pin is connected with a support in rotation, and the one end of the jump pin is a jump pin pivot end; a jump pin hole of the jump pin is aligned with a support hole of the support, the first spring shaft is limitedly matched with the jump pin, one end of the first crank swings in a direction away from the jump pin pivot end, the distance between the first spring shaft and the second spring shaft is less than or equal to the length of the first spring, and a first assembly state is formed; the operating mechanism is convenient for assembling the first spring; and the application also relates to an operating mechanism assembly method, which is simple in assembly operation and high in efficiency.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to an operating mechanism for a circuit breaker and a method for assembling the operating mechanism. Background Technology

[0002] Currently, the spring assembly of the four-bar linkage operating mechanism of circuit breakers is usually difficult and time-consuming, often requiring the use of tooling fixtures. Specifically, firstly, a tool is inserted through the opening at the top of the rocker arm to couple the spring hook to the linkage shaft. Then, the spring is further stretched, causing the other hook to move backward through the opening, thereby coupling the spring to the crossbar of the rocker arm. Furthermore, the operating mechanism usually has two springs, and even skilled operators need to spend a lot of time and effort to complete the spring assembly, leading to increased production assembly and labor costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the defects of the prior art and provide an operating mechanism for a circuit breaker that facilitates the assembly of the first spring; it also provides an assembly method for the operating mechanism implemented by the operating mechanism of the circuit breaker, which is simple and efficient in assembly.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An operating mechanism for a circuit breaker includes a bracket, a rocker arm assembly and a trip latch pivotally mounted on the bracket, a first crank pivotally mounted on the trip latch about a first axis, and a first spring; one end of the first spring is rotatably connected to the rocker arm assembly via a first spring shaft, and the other end is rotatably connected to the first crank via a second spring shaft; one end of the trip latch is rotatably connected to the bracket, serving as the trip latch pivot end;

[0006] The jumper includes a jumper hole for inserting a positioning pin, and the bracket includes a bracket hole for inserting a positioning pin.

[0007] The jump buckle hole is aligned with the bracket hole, the first spring shaft is engaged with the jump buckle limit, and one end of the first crank swings away from the pivot end of the jump buckle, so that the distance between the first spring shaft and the second spring shaft is less than or equal to the length of the first spring, forming the first assembly state.

[0008] Preferably, the jump catch further includes a jump catch protrusion, which, in the first assembled state, defines the swing position of the first crank.

[0009] Preferably, the buckle protrusion is located between the buckle hole and the buckle pivot end.

[0010] Preferably, the operating mechanism further includes a locking buckle and a re-locking buckle respectively pivotally mounted on the bracket, the re-locking buckle being in a limiting engagement with the locking buckle, and the locking buckle being in an engagement with the tripping buckle locking buckle; the rocker arm assembly includes a synchronously moving handle, a rocker arm fixedly connected to the handle, and a reset structure for driving the tripping buckle to rotate so that it engages with the locking buckle and the re-locking buckle, the rocker arm being pivotally mounted on the bracket; the first crank includes a crank limiting part, and when the operating mechanism is in the closed or disengaged state, the crank limiting part is in a limiting engagement with the tripping buckle.

[0011] Preferably, the bracket includes a V-groove, a rocker arm assembly is disposed in the V-groove, the jump buckle pivot end is located on one side of the V-groove, the locking buckle, the re-locking buckle and the bracket hole are located on the other side of the V-groove, and the rocker arm is pivotally disposed at the bottom of the V-groove.

[0012] Preferably, the operating mechanism further includes a slide rail, a slider, and a first connecting rod. The slider is slidably mounted on the slide rail. One end of the first connecting rod is rotatably connected to the first crank via a second spring shaft, and the other end is rotatably connected to the slider. When the operating mechanism is in the open or tripped state, the slide rail and the slider are in a limiting cooperation to prevent them from sliding.

[0013] A method for assembling the operating mechanism of a circuit breaker, characterized by comprising the following steps:

[0014] Step 1: Align the jumper hole of the jumper with the bracket hole of the bracket and insert the positioning pin into the jumper and bracket holes to put the operating mechanism into the first assembly state.

[0015] Step 2: In the first assembly state, assemble the two ends of the first spring to the first spring shaft and the second spring shaft respectively; swing the rocker arm in the direction of the jumper pivot end, and the rocker arm drives the first spring and the first crank to rotate, so that the operating mechanism enters the second assembly state.

[0016] Preferably, before step one, the second spring shaft is assembled on the first crank, the first crank is pivotally mounted on the jumper about the first axis, and the jumper is pivotally mounted on the bracket; the first spring shaft is mounted on the rocker arm of the rocker arm assembly, and the rocker arm is pivotally mounted in the V-groove of the bracket.

[0017] Preferably, the assembly method of the operating mechanism further includes step three: in the second assembly state, the reset structure of the rocker arm assembly is assembled on the rocker arm, the positioning pin is removed, and the first spring drives the jumper to rotate to engage with the limit position of the reset structure.

[0018] Preferably, the assembly method further includes the following steps:

[0019] Step 4: Assemble the slider onto the slide rail, and rotate the two ends of the first connecting rod onto the second spring shaft and the slider, respectively.

[0020] Step 5: Pivot and mount the latches on the bracket via the latch shaft, and pivot and mount the re-latch on the bracket via the re-latch shaft;

[0021] The order of steps four and five can be interchanged.

[0022] The operating mechanism of the circuit breaker of the present invention has a trip button with a trip button hole and a bracket with a bracket hole. The trip button, the bracket and the first crank cooperate to easily and quickly install the first spring on the first spring shaft and the second spring shaft, thereby improving the assembly efficiency of the operating mechanism and saving time and labor costs.

[0023] The assembly method of the operating mechanism of the present invention is realized through the operating mechanism of the circuit breaker, which can easily and quickly complete the assembly of the first spring and improve the assembly efficiency of the entire operating mechanism. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the operating mechanism of the present invention, with the operating mechanism in the closed state;

[0025] Figure 2 This is a schematic diagram of the operating mechanism of the present invention, with the operating mechanism in the open state;

[0026] Figure 3 This is a schematic diagram of the operating mechanism of the present invention, in which the operating mechanism is in a disengaged state;

[0027] Figure 4 This is a schematic diagram of the operating mechanism of the present invention, with the operating mechanism in the closed state;

[0028] Figure 5 This is a schematic diagram of the operating mechanism of the present invention, showing the operating mechanism in the open state;

[0029] Figure 6 This is a schematic diagram of the operating mechanism of the present invention, showing the operating mechanism in a disengaged state;

[0030] Figure 7 This is a schematic diagram of the circuit breaker of the present invention, with the circuit breaker in the closed state;

[0031] Figure 8 This is a schematic diagram of the circuit breaker of the present invention, with the circuit breaker in the open state;

[0032] Figure 9 This is a schematic diagram of the circuit breaker of the present invention, showing the circuit breaker in the tripped state;

[0033] Figure 10 This is a schematic diagram of the circuit breaker of the present invention. Each end of its moving contact is provided with a moving contact point, which respectively cooperates with two stationary contacts, and the circuit breaker is in the closed state.

[0034] Figure 11 This is a schematic diagram of the circuit breaker of the present invention, with the circuit breaker in the closed state;

[0035] Figure 12 This is a schematic diagram of the circuit breaker of the present invention, with the circuit breaker in the open state;

[0036] Figure 13 This is a schematic diagram of the circuit breaker of the present invention, with the circuit breaker in the tripped state;

[0037] Figure 14 This is a schematic diagram of the circuit breaker of the present invention, in which the moving contact is repelled by an electric repulsive force;

[0038] Figure 15 This is a schematic diagram of the circuit breaker of the present invention, showing the contact spring rotated to the second dead point position;

[0039] Figure 16 This is a schematic diagram of the circuit breaker of the present invention, in which the contact spring locks the moving contact;

[0040] Figure 17 This is a schematic diagram of the operating mechanism of the present invention. The positioning pin fixes the jumper and the bracket together. The second spring shaft is in a limiting engagement with the jumper. The first crank is in a limiting engagement with the jumper. The distance between the second spring shaft and the first spring shaft is less than or equal to the length of the first spring.

[0041] Figure 18 This is a schematic diagram of the operating mechanism of the present invention, and... Figure 17 In contrast, the first spring is mounted on the first spring shaft and the second spring shaft;

[0042] Figure 19 This is a schematic diagram of the operating mechanism of the present invention, showing at least the positional relationship between the first spring and the jumper;

[0043] Figure 20 This is a schematic diagram of the operating mechanism of the present invention, and... Figure 18 In contrast, the reset structure is mounted on the rocker arm;

[0044] Figure 21 This is a schematic diagram of the operating mechanism of the present invention, and... Figure 20 In comparison, the positioning pin was removed;

[0045] Figure 22 This is a projected schematic diagram of the bracket of the present invention, showing at least the V-groove;

[0046] Figure 23 This is a three-dimensional structural schematic diagram of the bracket of the present invention;

[0047] Figure 24 This is a projected schematic diagram of the bracket of the present invention, showing at least the positional relationship and spacing of the two jumper positioning arms;

[0048] Figure 25 This is a schematic diagram showing the connection between the jumper and the first crank of the present invention;

[0049] Figure 26 This is a schematic diagram of the assembly structure of the bracket, the jump buckle, and the jump buckle shaft of the present invention;

[0050] Figure 27 This is a schematic diagram of the rocker arm assembly of the present invention;

[0051] Figure 28 This is a structural schematic diagram of the rocker arm assembly of the present invention from another angle;

[0052] Figure 29 This is a schematic diagram of the moving contact assembly of the present invention;

[0053] Figure 30 This is a schematic diagram of the moving contact assembly of the present invention, showing at least the connection relationship between the moving conductive rod, the first clamping arm, and the second clamping arm;

[0054] Figure 31 This is a schematic diagram of one embodiment of the conductor of the present invention;

[0055] Figure 32 This is a schematic diagram of the fastener structure of the present invention;

[0056] Figure 33 This is a schematic diagram of the structure of the first embodiment of the moving contact of the present invention;

[0057] Figure 34 This is a schematic diagram of another embodiment of the conductor of the present invention;

[0058] Figure 35 This is a schematic diagram of one embodiment of the moving contact mechanism of the present invention;

[0059] Figure 36 This is a schematic diagram of the contact support structure of the present invention;

[0060] Figure 37 This is a schematic diagram of the structure of the moving contact insulating component of the present invention;

[0061] Figure 38 This is a schematic diagram of the assembly structure of the moving contact mechanism, the stationary contact, and the unit housing of the present invention;

[0062] Figure 39 This is a schematic diagram of the circuit breaker of the present invention, showing the assembly relationship of the moving contact mechanism, the first push rod, and the second push rod;

[0063] Figure 40 This is a schematic diagram of the circuit breaker of the present invention, showing the cooperation relationship between the moving contact, the first push rod, the second push rod and the unit housing;

[0064] Figure 41 This is a schematic diagram of the assembly structure of the operating mechanism, the fast tripping device and the circuit breaker pole of the present invention;

[0065] Figure 42 This is a schematic diagram of the assembly structure of the first intermediate push rod and the first intermediate shaft of the present invention;

[0066] Figure 43 This is a schematic diagram of the circuit breaker of the present invention, showing the assembly relationship between the operating mechanism and each circuit breaker pole;

[0067] Figure 44 This is a schematic diagram of the circuit breaker of the present invention, showing the coordination relationship between the fast tripping device and the operating mechanism of each circuit breaker pole;

[0068] Figure 45 This is a schematic diagram of another embodiment of the moving contact mechanism of the present invention;

[0069] Figure 46 This is a schematic diagram of the structure of the second embodiment of the moving contact of the present invention;

[0070] Figure 47 This is a schematic diagram of the operating mechanism of the present invention, wherein one end of the first crank is pivotally mounted on the support. Detailed Implementation

[0071] The following is in conjunction with the appendix Figure 1 The embodiments given in section 47 further illustrate specific implementations of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the descriptions of the following embodiments.

[0072] As shown in 7-16, 38-41, and 43, the circuit breaker of the present invention includes an operating mechanism 100 and at least one breaking pole 300; the operating mechanism 100 includes at least one set of moving contact mechanisms, the moving contact mechanism including a contact support 110 pivotally disposed about a third axis 111s and a moving contact 9 disposed on the contact support 110 and rotating synchronously therewith; each breaking pole 300 includes a stationary contact 18, the stationary contact 18 and the moving contact mechanism are matched one-to-one to form a contact system, and each breaking pole 300 is provided with at least one set of contact systems; the operating mechanism 100 is activated to cause the moving contact 9 and the stationary contact 18 to open or close, thereby realizing the closing or opening operation of the circuit breaker.

[0073] Preferably, the moving contact 9 rotates around the contact axis, and the contact axis coincides with the third axis 111s, or the contact axis is parallel to the third axis 111s (but does not coincide). It should be noted that the circuit breaker of the present invention also includes a moving contact shaft for supporting the rotation of the moving contact 9. The axis of the moving contact shaft coincides with the third axis 111s. The moving contact 9 is provided with a moving contact shaft hole 901 that cooperates with the moving contact shaft. In practical applications, the diameter of the moving contact shaft hole 901 is slightly larger than that of the moving contact shaft to ensure the rotational activity of the moving contact 9. When the circuit breaker of the present invention is normally opened or closed under the drive of the operating mechanism 100, the moving contact 9 and the contact support 110 operate synchronously, and their rotation axes coincide. When a short circuit fault occurs in the circuit breaker of the present invention, and the moving contact 9 is pushed back and rotates relative to the contact support 110, the inner surface of the moving contact shaft hole 901 supports the rotation of the moving contact 9 in a tangential manner with the moving contact shaft. At this time, the rotation axis of the moving contact 9 is parallel to the third axis 111s.

[0074] Preferred, such as Figure 43 As shown, the circuit breaker of the present invention includes multiple circuit breaking poles 300 arranged side by side, and the moving contact mechanism in each circuit breaking pole 300 is linked.

[0075] Preferred, such as Figure 7 As shown in Figure 9, the moving contact 9 is a single-break contact, with a moving contact at one end and a driving engagement with the contact support 110 at the other end; or, as... Figure 10 As shown, the moving contact 9 is a double-break contact, with moving contacts at both ends and a middle portion supporting a 110-degree drive engagement with the contact. It should be noted that the moving contact 9 may also include more breaks.

[0076] like Figure 43 As shown, the following is one implementation of the housing of the circuit breaker of the present invention:

[0077] The circuit breaker of the present invention also includes a circuit breaker housing 3, an operating mechanism 100 and a number of parallel circuit breaking poles 300 respectively disposed within the circuit breaker housing 3; each of the circuit breaking poles 300 further includes a unit housing 120, and the contact system of each circuit breaking pole 300 is respectively disposed within the corresponding unit housing 120; the housing of the circuit breaker includes the circuit breaker housing 3 and the unit housing 120.

[0078] The following is another implementation of the housing of the circuit breaker of the present invention:

[0079] The circuit breaker of the present invention also includes a circuit breaker housing 3, wherein each of the circuit breaking poles 300 is arranged side by side at intervals inside the circuit breaker housing 3, and a phase separation partition is provided between adjacent circuit breaking poles 300 to ensure sufficient electrical clearance and creepage distance between each circuit breaking pole 300; the circuit breaker housing includes the circuit breaker housing 3 and the phase separation partition.

[0080] The circuit breaker of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0081] like Figure 1 As shown in Figures 16, 43, and 44, the circuit breaker of this embodiment is preferably a molded case circuit breaker, which includes an operating mechanism 100 and a plurality of breaking poles 300. The operating mechanism 100 includes a moving contact mechanism, which includes a contact support 110 pivotally mounted around a third axis 111s and a moving contact 9 mounted on the contact support 110 and rotating synchronously therewith. Each breaking pole 300 includes a stationary contact 18, and the stationary contact 18 and the moving contact mechanism cooperate one-to-one to form a contact system. Each breaking pole 300 is provided with at least one set of contact systems. When the operating mechanism 100 is activated, the moving contact 9 and the stationary contact 18 are disconnected or closed, thereby realizing the opening or closing operation of the circuit breaker.

[0082] Specifically, such as Figure 43 and 44 As shown, the circuit breaker in this embodiment is a three-phase circuit breaker, including three parallel circuit breaker poles 300 (used to connect or disconnect the three-phase power circuit respectively). The operating mechanism 100 is mounted on the middle circuit breaker pole 300, and the moving contact mechanisms of the three circuit breaker poles 300 are linked (e.g., Figure 3 As shown, the moving contact mechanisms of the three circuit breaker poles 300 are preferably linked by a linkage shaft 5. Of course, the number of circuit breaker poles 300 can be adjusted according to actual needs. For example, there can be two circuit breaker poles 300 for use with a two-phase power supply; or there can be four circuit breaker poles 300 for use with a three-phase four-wire circuit; or there can be one circuit breaker pole 300 for use with a single-phase circuit.

[0083] like Figure 43 As shown, the following is a first embodiment of the circuit breaker housing in this embodiment:

[0084] The circuit breaker in this embodiment also includes a circuit breaker housing 3, an operating mechanism 100 and each circuit breaker pole 300 arranged side by side are respectively disposed in the circuit breaker housing 3; each circuit breaker pole 300 also includes a unit housing 120, and the contact system of each circuit breaker pole 300 is respectively disposed in the corresponding unit housing 120, and the contact support 110 is pivotally disposed on the unit housing 120; the housing of the circuit breaker includes the circuit breaker housing 3 and the unit housing 120.

[0085] Preferred, such as Figure 38 As shown, the contact support 110 includes support shaft grooves 111 respectively disposed on both sides thereon, and the unit housing 120 includes a housing shaft post 120-2 that mates with the support shaft grooves 111. Further, as... Figure 38 and 41As shown, the unit housing 120 includes two semi-housing units that are fitted together, and the two housing shafts 120-2 are respectively disposed on the inner walls of the two semi-housing units.

[0086] The circuit breaker in this embodiment can also achieve the following technical effects: the operating mechanism 100 (except for the moving contact mechanism) is set outside the unit housing 120, and the contact system is set inside the unit housing 120. Firstly, it avoids the deposition of arc particles generated by the closing / breaking of the moving and stationary contacts on the operating mechanism 100, which would affect the operating performance of the operating mechanism 100. Secondly, it also improves the insulation performance of the circuit breaker and ensures the personal safety of the user. Thirdly, it is conducive to the modular assembly of the operating mechanism 100.

[0087] The following is a second embodiment of the circuit breaker housing in this embodiment:

[0088] The circuit breaker in this embodiment also includes a circuit breaker housing 3, and each circuit breaking pole 300 is arranged side by side at intervals inside the circuit breaker housing 3, with a phase separation partition between adjacent circuit breaking poles 300; the circuit breaker housing includes the circuit breaker housing 3 and the phase separation partition.

[0089] like Figure 7 As shown in Figure 13, this is a first embodiment of the operating mechanism 100, which is equipped with a double slider mechanism. This reduces the correlation between the rotation angle of the operating mechanism and the contact system, and increases the opening distance of the moving contact without increasing the space requirement of the operating mechanism. Specifically, as follows:

[0090] like Figure 7As shown in Figure 13, the operating mechanism 100 includes a bracket 50, a rocker arm assembly and a jumper 60 pivotally mounted on the bracket 50, a first crank 30, a first spring 22, a first connecting rod 27, and a contact support 110. One end of the first crank 30 is pivotally mounted on the jumper 60 around a first axis 67m, and the other end is rotatably connected to one end of the first connecting rod 27. One end of the first spring 22 is connected to the rocker arm assembly, and the other end is connected to the rotatable connection between the first crank 30 and the first connecting rod 27. The operating mechanism 100 also includes a slide rail 25, a slider 26, and a second connecting rod 29. The slide rail 25 is mounted on the bracket 50 or the housing of the circuit breaker, and the slider 26 is slidably mounted on the slide rail 25 and rotatably connected to the other end of the first connecting rod 27. One end of the second connecting rod 29 is rotatably connected to the slider 26, and the other end is rotatably connected to the contact support 110, driving the contact support 110 to rotate around a third axis 111s. The operating mechanism 100 has a first slider mechanism formed by the first crank 30, the first connecting rod 27, the slide rail 25, and the slider 26, and a second slider mechanism formed by the contact support 110, the second connecting rod 29, the slide rail 25, and the slider 26. The first slider mechanism and the second slider mechanism cooperate to reduce the correlation between the rotation angle of the jumper 60, the first connecting rod 27, and the contact support 110. This increases the opening distance of the moving contact without increasing the space requirement of the operating mechanism, and ensures the reliable operation performance of the operating mechanism.

[0091] Preferably, the slide rail 25 has a groove-like structure or a hole-like structure. Further, when the slide rail 25 is a groove-like structure, it can be disposed on the inner wall of the bracket 50 or the inner wall of the unit housing 120 (when the circuit breaker 300 is not provided with a unit housing 120, a phase separation partition is provided between adjacent circuit breakers 300, and the slide rail 25 is disposed on the side wall of the phase separation partition). The slide rail 25 does not penetrate the bracket 50 or the unit housing 120 (or the phase separation partition) in the thickness or depth direction. Further, the two ends of the slide rail 26 are respectively disposed within the two slide rails 25, and the end of the first connecting rod 27 connected to the slider 26 and the end of the second connecting rod 29 connected to the slider 26 are both disposed within the space between the two slide rails 25. When the slide rail 25 has a hole-like structure, it can be disposed on the inner wall of the bracket 50 (e.g., Figure 4 -6) or on the inner wall of the unit housing 120 (when the circuit breaker 300 is not provided with a unit housing 120, a phase separation partition is provided between adjacent circuit breakers 300, and the slide rail 25 is provided on the side wall of the phase separation partition), the slide rail 25 penetrates the bracket 50 or the unit housing 120 (or the phase separation partition) in the thickness or depth direction. Further, as shown Figure 16 , 22As shown, the two ends of the slider 26 pass through the two slide rails 25 respectively. The end of the first connecting rod 27 connected to the slider 26 is located between the two slide rails 25. The ends of the two second connecting rods 29 connected to the slider 26 are located on both sides of the two slide rails 25 respectively, and are rotatably connected to the two ends of the slider 26 respectively.

[0092] Preferably, the slide rail 25 is straight, arc-shaped, triangular, or a combination of straight and arc-shaped. Furthermore, the shape of the slide rail 25 can also be adapted to the current rating of the circuit breaker, design space, and control requirements. Figure 11 , 12 As shown in Figure 13, when the circuit breaker trips or is opened, the slider 26 moves upward along the slide rail 25; when the circuit breaker closes, the slider 26 moves downward along the slide rail 25. The upward and downward trajectories coincide. In this case, it can be set to a straight, arc, or a combination of straight and arc shapes. The slide rail 25 can also be set to other shapes such as a triangle: for example, if the slide rail 25 is set to a triangle, when the circuit breaker trips or is opened, the slider 26 moves upward along one side of the triangle's movement trajectory along the slide rail 25; when the circuit breaker closes, the slider 26 moves downward along the other side of the triangle's movement trajectory along the slide rail 25. The downward and upward movement trajectories do not coincide (not shown in the figure); when the operating mechanism switches states, the slider 26 forms a closed movement trajectory along the slide rail 25.

[0093] like Figure 11 As shown in Figures 13, 23, and 46, one embodiment of the slide rail 25 and slider 26 is illustrated: the bracket 50 includes two support arms 501 arranged at relative intervals, each support arm 501 being provided with a slide rail 25, and the slider 26 being slidably mounted on the two slide rails 25 at both ends. Further, as... Figure 7 As shown in Figures 13, 23, and 46, the slide rail 25 is a sliding hole, and the slider 26 is a sliding shaft with its two ends respectively disposed within the two sliding holes. Further, as... Figure 7 As shown in Figures 13, 23, 41 and 46, the slide rail 25 is a straight hole, and the slider 26 is a sliding shaft disposed in the straight hole. The two ends of the sliding shaft are provided with sliding shaft grooves that limit and cooperate with the side wall of the straight hole.

[0094] Preferred, refer to Figure 11 As shown, the other end of the second connecting rod 29 is directly rotatably connected to the contact support 110 via the first connecting shaft 21. Further, as... Figure 47 As shown, the bracket 50 further includes a second clearance hole 509 for the first connecting shaft 21 to pass through, used to avoid the first connecting shaft 21. Further, as... Figure 47 As shown, the second clearance hole 509 is an arc-shaped hole that matches the movement trajectory of the first connecting shaft 21.

[0095] Preferred, such as Figure 41 As shown, the operating mechanism 100 includes multiple contact supports 110 arranged side-by-side at intervals. Each contact support 110 is linked by a linkage shaft 5. The circuit breaker housing is provided with a first clearance hole 120-7 for the linkage shaft 5 to pass through and for avoiding the linkage shaft 5. Further, as... Figure 41 As shown, the first clearance hole 120-7 is an arc-shaped hole, matching the movement trajectory of the linkage shaft 5. Further, as... Figure 41 As shown, when the circuit breaker housing includes a unit housing 120, the first clearance hole 120-7 is provided on the unit housing 120; or, when the circuit breaker housing is provided with a phase separation partition, the first clearance hole is provided on the phase separation partition.

[0096] Preferred, such as Figure 1 As shown in Figure 13, the operating mechanism 100 further includes a locking buckle 13 and a re-locking buckle 15 pivotally mounted on the bracket 50. A jumper buckle 60 engages with the locking buckle 13, and the locking buckle 13 and the re-locking buckle 15 engage with a limiting mechanism. Specifically, as shown... Figure 1 As shown in Figure 6.25, the snap fastener 60 has a snap fastener hook surface 604 at one end, and the latch 13 has a latch fastener hook surface. The snap fastener hook surface 604 is located below the latch fastener hook surface and cooperates with it to achieve the latching engagement of the snap fastener 60 and the latch 13; Figure 1 As shown in Figure 6, one end of the re-latch 15 is located on one side of the latch 13 and is in a limiting engagement with it. When the re-latch 15 is driven to rotate, the re-latch 15 and the latch 13 are released from the limiting engagement. The latch 13 rotates and releases the limiting engagement between the trip latch surface 604 and the latch latch surface, thus releasing the latch engagement between the latch 13 and the trip latch 60. Furthermore, the circuit breaker of the present invention also includes an overload and short-circuit protection mechanism. When a short circuit or overload fault occurs in the circuit breaker, the overload and short-circuit protection mechanism drives the re-latch 15 to rotate, thus releasing the limiting engagement between the re-latch 15 and the latch 13. Furthermore, the short-circuit and overload protection mechanism includes a short-circuit protection mechanism and an overload protection mechanism. The short-circuit protection mechanism is preferably an electromagnetic trip unit, and the overload protection mechanism is preferably a thermal trip mechanism (e.g., the overload protection mechanism includes a bimetallic strip). It should be noted that the cooperation between the latch 13 and the trip latch 60, the cooperation between the latch 13 and the re-latch 15, and the cooperation between the re-latch 15 and the short circuit and overload protection mechanism can all be achieved by existing technology, and will not be elaborated on here.

[0097] Preferred, such as Figure 1 As shown in Figure 13, the rocker arm assembly includes a synchronously moving handle 41, a rocker arm 45 fixedly connected to the handle 41, and a reset structure 42 for driving the latch 60 to rotate and re-engage with the lock 13. The rocker arm 45 is pivotally mounted on the bracket 50, and the two ends of the rocker arm 45 are respectively limited to the bracket 50 during the swing stroke of the rocker arm assembly. Further, as... Figure 4As shown in Figures 6 and 11-16, the reset structure 42 is a reset shaft, and the jumper 60 is a strip-shaped structure, with one end engaging with the latch 13 and the other end pivotally mounted on the bracket 50. The jumper 60 includes a driving edge 603 located at one of its edges, which engages with the reset structure 42. Specifically, as shown... Figure 4 As shown in directions -6 and 11-16, the driving side edge 603 is located at the upper edge of the jump buckle 60.

[0098] Preferred, such as Figure 1 As shown in Figure 13, the first crank 30 includes a crank limiting part 31, which engages with the trip latch 60 when the circuit breaker is in the closed or tripped state. Further, as... Figure 4 As shown in Figures 6 and 11-16, the crank limiting part 31 is a limiting shaft, and the crank limiting part 31 cooperates with the jumper 60 to prevent the first crank 30 from rotating. Further, as... Figure 4 As shown in Figures 6 and 11-16, the jump buckle 60 includes a limiting side edge 608 disposed on one side edge to cooperate with the crank limiting part 31. The limiting side edge 608 is an arc-shaped side edge. Specifically, as shown in Figure 6... Figure 4 As shown in -6, 11-16, the limiting side edge 608 is located at the lower edge of the jump buckle 60.

[0099] Preferred, such as Figure 1 As shown in Figure -13, the first connecting rod 27 and the first crank 30 are rotatably connected about the second axis 16m; one end of the first spring 22 is rotatably connected to the second axis 16m, and the other end is rotatably mounted on the rocker arm assembly about the fourth axis 46m. Further, as... Figure 1 As shown in Figure 13, the first crank 30 and the first connecting rod 27 are rotatably connected by the second spring shaft 16. One end of the first spring 22 is connected to the second spring shaft 16, and the other end is connected to the rocker arm 45 through the first spring shaft 46.

[0100] Preferred, such as Figure 1 As shown in Figure -3, the jump buckle 60 is pivotally mounted on the bracket 50 about the fifth axis for 11 seconds, the second buckle 15 is pivotally mounted on the bracket 50 about the sixth axis for 14 seconds, the locking buckle 13 is pivotally mounted on the bracket 50 about the seventh axis for 12 seconds, the rocker arm 45 is pivotally mounted on the bracket 50 about the eighth axis for 28 seconds, and one end of the first spring 22 is pivotally mounted on the rocker arm 45 about the fourth axis for 46 seconds. Further, as... Figure 4As shown in Figure 6, the jump buckle 60 is pivotally mounted on the bracket 50 via the jump buckle shaft 11, the re-buckle 15 is pivotally mounted on the bracket 50 via the re-buckle shaft 14, the locking buckle 13 is pivotally mounted on the bracket 50 via the locking buckle shaft 12, the rocker arm 45 is pivotally mounted on the bracket 50 via the rocker arm shaft 28, the two ends of the first spring 22 are respectively rotatably connected to the rocker arm 45 and the first crank 30 via the first spring shaft 46 and the second spring shaft 16, respectively. The first spring shaft 46 and the second spring shaft 16 are respectively located on both sides of the jump buckle 60, the first crank 30 is pivotally mounted on the jump buckle 60 via the first crank shaft 67, one end of the first connecting rod 27 is rotatably connected to the first crank 30 via the second spring shaft 16, and the other end is rotatably connected to the slider 26. Further, as... Figure 22 As shown, the bracket arm 501 of the bracket 50 is provided with bracket-jump buckle shaft hole 511, bracket-re-buckle shaft hole 514, bracket-locking shaft hole 512, and bracket-rocker arm shaft groove 528 respectively cooperating with the jump buckle shaft 11, the re-buckle shaft 14, the locking shaft 12, and the rocker arm shaft 28; Figure 25 As shown, the jump buckle 60 includes a jump buckle shaft hole 601 at one end, the first crank 307 is provided with a crank shaft hole 307 that cooperates with the first crank shaft 67, and the middle part of the jump buckle 60 is provided with a jump buckle-crank shaft hole that cooperates with the first crank shaft 67.

[0101] Preferred, such as Figure 4 As shown in Figures 6, 11, 16, and 25, one embodiment of the first crank 30 is described: the first crank 30 has a triangular structure, with one vertex pivotally mounted on the latch 60 about a first axis 67m, another vertex pivotally connected to the first spring 22 and the first connecting rod 27 about a second axis 16m, and a third vertex having a crank limiting part 31. Further, as... Figure 26 As shown, the two first cranks 30 are respectively disposed on both sides of the jump buckle 60, and the three vertices of the two first cranks 30 are connected by the first crank shaft 67, the second spring shaft 16, and the crank limiting part 31, respectively. Further, as... Figure 25 As shown, the first crank 30 includes a crank shaft hole 307, a limiting shaft hole 301, and a crank-spring shaft groove 302 that respectively cooperate with the first crank shaft 67, the crank limiting part 31, and the second spring shaft 16. The three are located at the three apex corners of the first crank 30.

[0102] Preferred, such as Figure 4 As shown in Figures 6 and 11-16, the bracket 50 includes a V-groove 505, and the rocker arm 45 is respectively positioned and engaged with the two side walls of the V-groove 505 at the first and second ends of its travel. Further, as... Figure 22 and 23As shown, the bracket 50 includes bracket arms 501 and bracket connecting plates 502 arranged at relatively intervals. The two ends of the bracket connecting plate 502 are bent and connected to the two bracket arms 501 respectively, making the bracket 50 as a whole U-shaped structure. Each bracket arm 501 is provided with a V-groove 505; Figure 27 and 28 As shown, the rocker arm 45 includes a pair of rocker arm legs 408 that are spaced apart from each other, respectively disposed in two V-grooves 501 and rotatably connected to two support arms 501.

[0103] Specifically, such as Figure 4 In the directions shown in -6 and 11-16, the lower end of the rocker arm support 408 is pivotally mounted at the bottom of the V-groove 505 via the rocker arm shaft 28. At the first and second ends of the stroke, the rocker arm support 408 is respectively engaged with the right and left walls of the V-groove for limiting. Further, as... Figure 22 As shown, the bottom of the V-groove 505 is provided with a bracket-rocker arm shaft groove 528 that mates with the rocker arm shaft 28; as Figure 27 As shown, one end of the rocker arm support 408 is provided with a rocker arm shaft groove 428 that mates with the rocker arm shaft 28, and is in relative cooperation with the bracket-rocker arm shaft groove 528.

[0104] The following describes the process by which the operating mechanism 100 of the first embodiment switches between the open state, the closed state, and the tripped state:

[0105] like Figure 7 As shown in Figure 13, the two ends of the swing stroke of the rocker arm 45 are the first end of the stroke and the second end of the stroke, respectively; the two ends of the first spring 22 are the first end 220 and the second end 221, respectively, which are connected to the rocker arm assembly and the first crank 30. Specifically, as shown in Figure 13... Figure 7 As shown in Figure 13, the first end and the second end of the stroke of the rocker arm 45 are the right end and the left end of the swing stroke of the rocker arm 45, respectively. The upper end of the first spring 22 is the first end 220 of the spring, and the lower end is the second end 221 of the spring.

[0106] The following will combine Figure 7 , 8 As shown in Figures 11 and 12, the operation process of the operating mechanism 100 switching from the closed state to the open state is described: Figure 7 and 11As shown, when the operating mechanism 100 is in the closed state, the rocker arm 45 swings to the second end of its stroke and drives the first end 220 of the spring to rotate around the second end 221 of the spring. When the first spring 22 passes the first dead point, the first spring 22 drives the first crank 30 to rotate in the second direction and drives the rocker arm 45 to swing to the second end of its stroke. The first crank 30 drives the slider 26 to slide along the slide rail 25 through the first connecting rod 27. The slider 26 drives the contact support 110 to rotate in the first direction to the disconnected position through the second connecting rod 29, so that the operating mechanism switches to the position as shown. Figure 8 and 12 The circuit breaker is shown in the tripped state. Specifically, as shown... Figure 7 , 8 As shown in Figures 11 and 12, when the operating mechanism 100 switches from the closed position to the open position, the slider 26 moves upward along the slide rail 25 in a first direction counterclockwise and a second direction clockwise. When the first spring 22 is at the first dead point position, the energy stored in the first spring 22 reaches its maximum value, and the first axis 67m is located on the first axis. Simultaneously, as the first spring 22 rotates around the second end 221 past the first dead point position, the first axis 22 rotates past the first axis 67m. Therefore, the first axis 67m can also be considered the first dead point position; that is, the first axis 22 rotating past the first axis 67m is also the first spring 22 rotating past the first dead point position. It should be noted that... Figure 12 As shown, when the operating mechanism 100 is in the open state, the contact support 110 and / or the moving contact 9 are limited by the unit housing 120, so that the contact support 110 can no longer rotate in the first direction. At the same time, the contact support 110 limits the slider 26 through the second connecting rod 29, preventing the slider 26 from sliding upward along the slide rail 25.

[0107] The following will combine Figure 7 , 8 As shown in Figures 11 and 12, the operation process of the operating mechanism 100 switching from the open state to the closed state is described: Figure 8 and 12 As shown, when the operating mechanism 100 is in the open state, the rocker arm 45 swings towards the first end of its stroke and drives the first end 220 of the spring to rotate around the second end 221 of the spring. When the first spring 22 passes the first dead point, the first spring 22 drives the first crank 30 to rotate in the first direction, so that the crank limiting part 31 and the jump buckle 60 are limited to cooperate, preventing the first crank 30 from rotating in the first direction. At the same time, the first spring 22 drives the rocker arm 45 to swing to the first end of its stroke, and the first crank 30 drives the slider 26 to slide along the slide rail 25 through the first connecting rod 27. The slide rail (26) drives the contact support 110 to rotate in the second direction to the closed position through the second connecting rod 29, so that the operating mechanism switches to the closed state; the first direction and the second direction are opposite to each other. Specifically, as shown in the figure... Figure 7 , 8As shown in Figures 11 and 12, when the operating mechanism 100 switches from the open state to the closed state, the slider 26 moves downward along the slide rail 25. It should be noted that, as... Figure 7 As shown, when the operating mechanism 100 is in the closed state, the moving contact 9 and the stationary contact 18 are closed, preventing the contact support 110 from continuing to rotate in the second direction. At the same time, the contact support 110 limits the slider 26 through the second connecting rod 29, preventing the slider 26 from sliding downward along the slide rail 25.

[0108] The following combination Figure 7 , 9 As shown in Figures 11 and 13, the operation process of the operating mechanism 100 switching from the closed state to the tripped state is described: Figure 7 and 11 As shown, when the operating mechanism 100 is in the closed state, the latch 15 rotates to release its limiting engagement with the latch 13, and the latch 13 rotates to release its locking engagement with the trip latch 60. The trip latch 60 rotates and drives the first crank 30 to rotate synchronously. The first crank 30 drives the slider 26 to slide along the slide rail 25 through the first connecting rod 27. At the same time, the slider 26 drives the contact support 110 to rotate in the second direction to the disconnected position through the second connecting rod 29. The first spring 22 drives the rocker arm 45 to swing to the second end of the stroke until the reset structure 42 engages with the trip latch 60. The operating mechanism then switches to the position shown. Figure 9 and 13 The tripped state is shown. Specifically, as shown... Figure 7 , 9 As shown in Figures 11 and 13, when the operating mechanism 100 switches from the closed state to the tripped state, the slider 26 moves upward along the slide rail 25. It should be noted that, as... Figure 13 As shown, when the operating mechanism 100 is in the disengaged state, the contact support 110 and / or the moving contact 9 are limited by the unit housing 120, so that the contact support 110 can no longer rotate in the first direction. At the same time, the contact support 110 limits the slider 26 through the second connecting rod 29, preventing the slider 26 from sliding upward along the slide rail 25.

[0109] The following will combine Figure 8 , 9 As shown in Figures 11 and 13, the operation process of the operating mechanism 100 switching from the tripped state to the open state is described: Figure 9 and 13 As shown, when the operating mechanism 100 is in the disengaged state, the rocker arm 45 swings to the second end of its stroke. The rocker arm 45 drives the jump buckle 60 to rotate and engage with the locking buckle 13 through the reset structure 42. At the same time, the locking buckle 13 rotates to engage with the re-locking 15 at the limit position, and the operating mechanism switches to the position as shown. Figure 8 and 11 The circuit breaker is shown in the tripped state.

[0110] The following is a second embodiment of the operating mechanism 100, as detailed below:

[0111] The difference between the operating mechanism 100 in the second embodiment and the first embodiment is that the operating mechanism 100 in the second embodiment further includes an auxiliary limiting structure. One end of the auxiliary limiting structure is rotatably connected to the second connecting rod 29, and the other end is rotatably connected to the bracket 50 or the housing of the circuit breaker. The auxiliary limiting structure coordinates with the movement of the slider 26, affecting the movement state of the second connecting rod 29, and thus jointly limiting the movement trajectory of the second connecting rod 29 at the rotatable connection point with the contact support 100.

[0112] It should be noted that the auxiliary limiting structure, which is rotatably connected to one end of the bracket 50 or the circuit breaker housing, can also be configured to reciprocate along a predetermined trajectory, for example, by sliding the end in a track. Furthermore, when one end of the auxiliary limiting structure is connected to the circuit breaker housing, that end can be connected to the circuit breaker housing 3 or the unit housing 120 (or the phase separation partition).

[0113] Preferably, the auxiliary limiting structure is a connecting rod structure or a crank-slider structure. Further, the auxiliary limiting structure is a third crank, one end of which is rotatably connected to the second connecting rod 29, and the other end is rotatably connected to the bracket 50 or the circuit breaker housing. When the slider 26 slides along the slide rail 25, the second connecting rod 29 moves accordingly. Simultaneously, the portion of the third crank rotatably mounted on the bracket 50 or the circuit breaker housing rotates, providing auxiliary limitation to the movement of the second connecting rod 29. The synergistic effect of the second connecting rod 29 and the third crank makes the movement of the second connecting rod 29 more precise.

[0114] Preferably, the third crank is a straight or curved plate structure.

[0115] like Figure 7 Figures 13 and 47 show a third embodiment of the operating mechanism 100, as detailed below:

[0116] The difference between the operating mechanism 100 in the third embodiment and that in the first embodiment is that the operating mechanism 100 further includes a second crank 19, which includes a second crank support, a second crank connecting part, and a second crank driving part. The second crank 19 is pivotally mounted via the second crank support and connected to the contact support 110 via the second crank driving part. One end of the second connecting rod 29 is rotatably connected to the slider 26, and the other end is rotatably connected to the second crank connecting part, driving the contact support 110 to rotate around the third axis 111s. Furthermore, the second crank 19 is pivotally mounted on the bracket 50 or the circuit breaker housing via the second crank support. Furthermore, the rocker arm assembly can drive the first crank 30 to swing via the first spring 22. The first crank 30 drives the slider 26 to slide on the slide rail 25 via the first connecting rod 27. The slider 26 drives the second crank 19 to swing via the second connecting rod 29. The second crank 19 drives the contact support 110 to rotate, and the contact support 110 drives the moving contact 9 of the circuit breaker to rotate. The slider 26 slides on the guide rail 25, and the slider 26 drives the second crank 19 to swing via the second connecting rod 29. Due to the rotation axis at the rotational connection between the second connecting rod 29 and the second crank 19 (reference... Figure 11 The distance between the reference numeral 21 of -14 and the third axis 111s is much smaller than the length of the moving contact 9. Therefore, the second connecting rod 29 drives the second crank 19 to rotate slightly, which will be proportionally amplified to the opening distance between the moving contact and the stationary contact. By adjusting the connection position of the second connecting rod 29 and the second crank 19, the opening distance of the moving contact 9 can be adjusted.

[0117] Specifically, when the second crank support of the second crank 19 is disposed on the circuit breaker housing, the second crank support can be pivotally disposed on the circuit breaker housing 3 or the unit housing 120 (or the phase separation partition). Further, as... Figure 41 As shown, the second crank support is pivotally mounted on the unit housing 120 via a second crankshaft 79. Furthermore, the unit housing 120 includes a second crankshaft hole, which is a blind hole, and the second crankshaft 79 engages with the second crankshaft hole.

[0118] Specifically, such as Figure 47 As shown, when the second crank support of the second crank 19 is mounted on the bracket 50, the second crank support is pivotally mounted on the side wall of the bracket 50 via the second crank 79. The second crank shaft 79 can be a common connecting part such as a rivet, screw or bolt. The pivotal mounting of the second crank support on the bracket 50 is beneficial to further reduce the assembly error of the operating mechanism 100 and improve the operational reliability of the operating mechanism 100.

[0119] Preferred, such as Figure 11As shown in Figures 16, 41, and 47, the second crank connecting portion of the second crank 19 is disposed between the second crank support portion and the second crank drive portion. Specifically, as... Figure 11 As shown in Figure 13, the second crank support and the second crank drive are respectively disposed at both ends of the second crank 19, and the second crank support is disposed in the middle of the second crank 19 and located between the second crank support and the second crank drive.

[0120] Preferably, the rotation center of the second crank 19 is the ninth axis, which is parallel to or coincides with the third axis 111s. Specifically, as shown... Figure 41 As shown, when the second crank support is pivotally mounted on the unit housing 120, the ninth axis coincides with the third axis 111s; as Figure 47 As shown, when the second crank support is pivotally mounted on the bracket 50, the ninth axis and the third axis 111s are parallel and do not coincide.

[0121] Preferred, such as Figure 11 As shown in -16, 41, the second connecting rod 29 is rotatably connected to the second crank connecting part of the second crank 19 via the first connecting shaft 21.

[0122] Preferred, such as Figure 11 As shown in Figures 16 and 41, the second crank drive unit of the second crank 19 is connected to the contact support 110 via the linkage shaft 5. The linkage shaft 5 is a connecting shaft that enables the synchronous rotation of each contact support 110. The connection between the second crank drive unit of the second crank 19 and the linkage shaft 5 to drive the contact support 110 to rotate is beneficial to improving the synchronicity of the operation of each circuit breaker 300.

[0123] Preferably, the second connecting rod 29 has an arc-shaped or straight plate structure, with one end rotatably connected to the slider 26 and the other end rotatably connected to the second crank 19 (or, in the operating mechanism 100 of the first embodiment, the second crank 19 is directly connected to the contact support 110). Further, as... Figure 11 As shown in Figures 16, 41, and 47, the second connecting rod 29 has an arc-shaped plate structure, one end of which is rotatably connected to the slider 26, and the other end is rotatably connected to the second crank connecting part of the second crank 19. It should be noted that the shape of the second connecting rod 29 can be adapted to specific spatial conditions. When it is necessary to avoid certain structures, it can be designed into a shape that meets the requirements. Arc-shaped or straight plate shapes are common designs, but the shape of the second connecting rod 29 is not limited to arc-shaped or straight plate structures.

[0124] like Figure 1 As shown in Figure 13, this is the fourth embodiment of the operating mechanism 100, as detailed below:

[0125] The operating mechanism 100 of the fourth embodiment differs from the operating mechanisms 100 of the first to third embodiments in that, for example... Figure 2 As shown in Figures 3, 5, 6, 8, 9, and 12, the slide rail 25 is fixedly mounted on the bracket 50. When the operating mechanism 100 is in the open or tripped state, the slider 26 is limited by the slide rail 25 to prevent the slider 26 from sliding. The slide rail 25 provides guidance for the slider 26 and also serves as a support point, providing support for the first connecting rod 27 and the slider 26. This allows the operating mechanism 100 to have stable closed, open, and tripped positions without cooperating with the contact support 110, making the operating mechanism 100 an independently operable mechanism. This facilitates modular assembly and production of the operating mechanism 100 and provides more design space for its distribution within the circuit breaker housing 3. Furthermore, in actual production, the operating mechanism 100 does not need to cooperate with the contact system, avoiding contact system wear during testing, improving assembly efficiency, and reducing R&D and production costs. Furthermore, in the fourth embodiment, the operating mechanism 100 can independently switch between three states or positions: closed, open, and tripped, even when the second link 29, contact support 110, and moving contact 9 are removed.

[0126] like Figure 4 As shown in Figures 6 and 11-16, this is one layout of the operating mechanism 100 in the fourth embodiment: the re-clamp 15, the locking buckle 13, the jump buckle 16, and the first crank 30 are all disposed between two support arms 501; one end of the jump buckle 60 is pivotally disposed on the support connecting plate 502, and the other end is locked to the locking buckle 13; the re-clamp 15 and the locking buckle 13 are disposed on one side of the V-groove 501, and the support connecting plate 502 is located on the other side of the V-groove 501; one end of the rocker arm support 408 is pivotally disposed at the bottom of the V-groove 501; one end of the first crank 30 is rotatably connected to the middle of the jump buckle 60, and the other end is rotatably connected to one end of the first connecting rod 27, and the other end of the first connecting rod 27 is drivenly connected to the slider 26; the slide rail 25 is disposed on the support arm 501, and is disposed at both ends of the support arm 501 and opposite in opening direction to the V-groove 501. Further, as... Figure 7 As shown in Figure 16, the slider 26 is also connected to one end of the second connecting rod 29, and the other end of the second connecting rod 29 is connected to the second crank 19. One end of the second crank 19 is pivotally mounted around the ninth axis, which coincides with the third axis 111s, and the other end is connected to the contact support 110.

[0127] Specifically, such as Figure 4In the directions shown in -6 and 11-16, the right end of the jump buckle 60 is pivotally mounted on the bracket connecting plate 502, and the left end is locked with the latch 13; the re-buckle 15 and the latch 13 are located on the left side of the V-groove 501, and the bracket connecting plate 502 is located on the right side of the V-groove 501; the lower end of the rocker arm support 408 is pivotally mounted at the bottom of the V-groove 501; the upper end of the first crank 30 is rotatably connected to the middle of the jump buckle 60, and the lower end is rotatably connected to the upper end of the first connecting rod 27, and the lower end of the first connecting rod 27 is drivenly connected to the slider 26; the slide rail 25 and the V-groove 501 are respectively located at the lower and upper ends of the bracket arm 501, and their openings face downwards and upwards respectively. Further, as... Figure 7 In the direction shown in -16, the upper end of the second connecting rod 29 is connected to the slider 26, and the lower end is connected to the second crank 19. The upper end of the second crank 19 and the contact support 110 are respectively pivoted around the third axis 111s. The lower end of the second crank 19 is driven to be connected to the contact support 110.

[0128] To better illustrate the structure and principle of the operating mechanism 100, the following describes in detail the cooperation relationship between the components of the operating mechanism 100 in the fourth embodiment under three states (closed, open, and tripped), as follows:

[0129] like Figure 1 As shown in Figure 6, the two ends of the swing stroke of the rocker arm 45 are the first end of the stroke and the second end of the stroke, respectively; the two ends of the first spring 22 are the first end 220 and the second end 221, respectively, which are connected to the rocker arm assembly and the first crank 30, respectively; the axis of the first spring 22 is the first axis, and the two sides of the first axis are the first side of the axis and the second side of the axis, respectively; as shown in Figure 6. Figure 1 and 4 As shown, when the operating mechanism 100 is in the closed state, the rocker arm 45 is located at the first end of its stroke, the latch 15 and the locking latch 13 are in a limiting engagement, the locking latch 13 and the jump latch 60 are in a locking engagement, the crank limiting part 31 and the jump latch 60 are in a limiting engagement to prevent the first crank 30 from rotating in the first direction, and the first shaft center 67m is located on the first side of the axis; as Figure 2 and 5 As shown, when the operating mechanism 100 is in the open state, the rocker arm 45 is located at the second end of its stroke. The latch 15 and lock 13 are in a limiting engagement, the lock 13 is in a locking engagement with the jump latch 60, the crank limiting part 31 is released from its limiting engagement with the jump latch 60, the reset structure 42 is in a limiting engagement with the jump latch 60, the slider 26 is in a limiting engagement with the slide rail 25 and, through the first connecting rod 27, prevents the first crank 30 from rotating in the second direction. The first and second directions are opposite to each other, and the first axis 67m is located on the second side of the axis. Further, as... Figure 3 and 6As shown, when the operating mechanism 100 is in the disengaged state, the rocker arm 45 is located in the middle of its swing stroke, the re-lock 15 and the locking latch 13 are released from their limiting engagement, the locking latch 13 and the trip latch 60 are released from their locking engagement, the crank limiting part 31 and the trip latch 60 are limited engagement, the reset structure 42 and the trip latch 60 are limited engagement, the slider 26 and the slide rail 25 are limited engagement, and the first axis 67m is located on the first side of the axis; the operating mechanism 100 enters the open state after being re-locked from the disengaged state.

[0130] Specifically, such as Figure 1 As shown in -6, the first end of the stroke is the right end of the swing stroke of the rocker arm assembly or rocker arm 45, and the second end of the stroke is the left end of the swing stroke of the rocker arm assembly or rocker arm 45; the first side of the axis is the left side of the first axis, and the second side of the axis is the right side of the first axis; the first direction is counterclockwise, and the second direction is clockwise.

[0131] It should be noted that the "re-locking" of the operating mechanism 100 means that the locking buckle 13 and the jump buckle 60 restore the locking engagement and the re-locking buckle 15 and the locking buckle 13 restore the limiting engagement.

[0132] The following describes the operation process of the operating mechanism 100 in the fourth embodiment switching between the closed state, the open state, and the tripped state:

[0133] The following will combine Figure 1 , 4 As shown in Figures 2 and 5, the operation process of the operating mechanism 100 switching from the closed state to the open state is described: Figure 1 and 4 As shown, when the operating mechanism 100 is in the closed state, the rocker arm 45 swings to the second end of its stroke and drives the first end 220 of the spring to rotate around the second end 221 of the spring. When the first spring 22 passes the first dead point position, the first spring 22 drives the first crank 30 to rotate in the second direction and drives the rocker arm 45 to swing to the second end of its stroke. The first crank 30 drives the slider 26 to move to the limit engagement with the slide rail 25 through the first connecting rod 27, preventing the first crank 30 from rotating in the second direction. The operating mechanism 100 then switches to the closed state. Figure 2 and 5 The circuit breaker is shown in the tripped state. Specifically, as shown... Figure 1 and 4In the indicated direction, the operating mechanism 100 is in the closed state. The rocker arm 45 swings from right to left (from the first end of the stroke to the second end of the stroke) and drives the first end 220 of the spring to rotate counterclockwise around the second end 221 of the spring. When the first spring 22 passes the first dead point position, the first spring 22 drives the first crank 30 to rotate rapidly in the clockwise direction (second direction) and drives the rocker arm 45 to swing rapidly to the second end of the stroke. The first crank 30 drives the slider 26 to move to the upper end of the slide rail 25 through the first connecting rod 27 and engages with its limit, preventing the first crank 30 from rotating in the clockwise direction (second direction). The operating mechanism 100 then switches to... Figure 2 and 5 The circuit breaker is shown in the tripped state.

[0134] The following will combine Figure 1 , 4 Sections 2 and 5 describe the operation process of the operating mechanism 100 switching from the open state to the closed state: For example... Figure 2 and 5 As shown, when the operating mechanism 100 is in the open state, the rocker arm 45 swings towards the first end of its travel and drives the first end 220 of the spring to rotate around the second end 221 of the spring. When the first spring 22 passes the first dead point position, the first spring 22 drives the first crank 30 to rotate in the first direction, causing the crank limiting part 31 to engage with the jump buckle 60 to prevent the first crank 30 from rotating in the first direction. At the same time, it drives the rocker arm 45 to swing to the first end of its travel, and the operating mechanism 100 switches to the open state. Figure 1 and 4 The circuit breaker is shown in the closed state; the first direction and the second direction are opposite to each other. Specifically, as shown... Figure 2 and 5 In the indicated direction, the operating mechanism 100 is in the open state. The rocker arm 45 swings from left to right (from the second end of the stroke to the first end of the stroke) and drives the first end 220 of the spring to rotate clockwise around the second end 221 of the spring. When the first spring 22 passes the first dead point position, the first spring 22 drives the first crank 30 to rotate rapidly in the counterclockwise direction (first direction), so that the crank limiting part 31 engages with the jump buckle 60 to prevent the first crank 30 from continuing to rotate in the counterclockwise direction (first direction). At the same time, the first crank 30 drives the slider 26 to move from the upper end of the slide rail 25 to the middle of the slide rail 25 through the first connecting rod 27. At the same time, the first spring 22 drives the rocker arm 45 to swing rapidly to the first end of the stroke, and the operating mechanism 100 switches to the open state. Figure 1 and 4 The circuit breaker is shown in the closed state.

[0135] The following will combine Figure 1 , 4 Sections 3 and 6 describe the operation process of the operating mechanism 100 switching from the closed state to the tripped state: For example... Figure 1 and 4As shown, when the operating mechanism 100 is in the closed state, the latch 15 rotates to release its limiting engagement with the latch 13, and the latch 13 rotates to release its locking engagement with the trip latch 60. The trip latch 60 rotates and drives the first crank 30 to rotate synchronously. The first crank 30 drives the slider 26 to move to the limit engagement with the slide rail 25 through the first connecting rod 27 to prevent the trip latch 60 from continuing to rotate. The first spring 22 drives the rocker arm 45 to swing to the second end of the stroke until the reset structure 42 engages with the trip latch 60. The operating mechanism 100 then switches to the closed state. Figure 3 and 6 The tripped state is shown. Specifically, as shown... Figure 1 and 4 In the indicated direction, when the operating mechanism 100 is in the closed state, the latch 15 rotates counterclockwise to release its limiting engagement with the latch 13. The latch 13 rotates counterclockwise to release its locking engagement with the trip latch 60. The trip latch 60 rotates clockwise and drives the first crank 30 to rotate synchronously with it. The first crank 30 drives the slider 26 to move to the upper end of the slide rail 25 through the first connecting rod 27 and engages with its limiting engagement, preventing the trip latch 60 from continuing to rotate clockwise. The first spring 22 drives the rocker arm 45 to swing rapidly in the counterclockwise direction (the direction of the second end of the stroke) until the reset structure 42 engages with the trip latch 60's limiting engagement. The operating mechanism 100 then switches to... Figure 3 and 6 The tripped state is shown.

[0136] The following will combine Figure 3 , 6 Sections 2 and 5 describe the operation process of the operating mechanism 100 switching from the tripped state to the open state: For example... Figure 3 and 6 As shown, when the operating mechanism 100 is in the disengaged state, the rocker arm 45 swings to the first end of its stroke, driving the jump buckle 60 to rotate and engage with the locking buckle 13 via the reset structure 42, so that the locking buckle 13 and the re-locking buckle 15 are in a limited engagement, and the operating mechanism 100 switches to... Figure 2 and 5 The circuit breaker is shown in the tripped state. Specifically, as shown... Figure 3 and 6 In the indicated direction, when the operating mechanism 100 is in the disengaged state, the rocker arm 45 swings counterclockwise to the first end of its stroke, driving the jump buckle 60 to rotate counterclockwise through the reset structure 42 until it engages with the jump buckle 13. Simultaneously, the jump buckle 60 drives the jump buckle 13 to rotate clockwise, causing the lock buckle 13 to engage with the re-lock 15 in a limited position. The operating mechanism 100 then switches to... Figure 2 and 5 The circuit breaker is shown in the tripped state.

[0137] Preferred, such as Figure 1 As shown in Figure 6, when the first spring 22 is at the first dead point position, the first axis 67m is located on the first axis. Further, as... Figure 1As shown in Figure 6, the first spring 22 is a tension spring, the first direction refers to the direction toward the first end of the stroke, and the second direction refers to the direction toward the second end of the stroke.

[0138] like Figure 23 As shown in Figure 26, the present invention also provides a connection structure that enables a simple connection between the buckle 60 and the bracket 50, as detailed below:

[0139] like Figure 23 As shown, the connecting structure includes a bracket 50, a snap fastener 60, and a snap fastener shaft 11. The bracket 50 includes a bracket connecting plate 502 and a bracket arm 501 connected to the bracket connecting plate 502. The snap fastener shaft 11 is connected to the bracket arm 501. The snap fastener 60 is rotatably mounted on the snap fastener shaft 11. The bracket 50 also includes a snap fastener positioning arm 503, which limits the snap fastener 60 on both sides, restricting its position axially on the snap fastener shaft 11. Compared with the existing technology of riveting the snap fastener 60 and the snap fastener shaft 11 before assembling it onto the bracket 50, this connecting structure is simpler to operate and reduces the requirements for the heat treatment process of the snap fastener 11, making the operation convenient and quick.

[0140] Preferred, such as Figure 24 and 26 As shown, the spacing W0 of the portion of the jump buckle positioning arm 503 located on both sides of the jump buckle 60 for limiting the jump buckle 60 is matched with the thickness of the jump buckle 60, ensuring the flexibility of the jump buckle 60 in rotation while preventing the jump buckle 60 from moving along the extension direction of the jump buckle shaft 11.

[0141] Preferred, such as Figure 23 As shown in Figures 24 and 26, at least two of the aforementioned jump-lock positioning arms 503 are arranged at a relative interval. Further, as... Figure 23 and 24 As shown, the two buckle positioning arms 503 are offset along the axial direction of the buckle shaft 11 and are located on both sides of the buckle shaft 11.

[0142] Preferred, such as Figure 23 Figures 24 and 26 illustrate one implementation of the jump buckle positioning arm 503: two jump buckle positioning arms 503 are arranged at intervals relative to each other, with one end of each jump buckle positioning arm 503 connected to the bracket connecting plate 502 and the other end locked against one side of the jump buckle 60. Further, as shown... Figure 23 As shown, one end of each of the two snap-lock positioning arms 503 is bent and connected to the bracket connecting plate 502, and the other end extends in the direction of the snap-lock shaft 11 and is respectively locked on both sides of the snap-lock 60. The length of the snap-lock positioning arm 503 is greater than the distance between the snap-lock shaft 11 and the bracket connecting plate 502. Specifically, with Figure 23The side facing the reader is the front side. The rear end of the snap-lock positioning arm 503 is connected to the bracket connecting plate 502, and the front end extends in the direction of the snap-lock shaft 11. Further, as... Figure 23 As shown, the jump buckle positioning shaft 503 and the bracket connecting plate 502 are an integral structure, which is formed by cutting and bending the middle part of the bracket connecting plate 502.

[0143] Preferably, the following is another implementation of the jump buckle positioning arm 503 (not shown in the figure): the bracket 50 further includes a positioning arm connecting plate, one end of which is connected to the two jump buckle positioning arms 503 respectively, and the other end is connected to the bracket connecting plate 502.

[0144] It should be noted that the setting method of the jump buckle positioning arm 503 is not limited to the two implementation methods mentioned above. The jump buckle positioning arm 503 can also be connected to the support arm 501. The jump buckle positioning arm 503 and the support 50 can be an integral structure or a separate structure assembled later (through common connection methods, such as welding, screw connection, riveting, etc.).

[0145] Preferably, the snap-fit ​​positioning arm 503 includes a positioning arm clearance hole for the snap-fit ​​shaft 11 to pass through; or, as... Figure 23 As shown, the jump buckle positioning arm 503 includes a semi-circular positioning arm clearance groove through which the jump buckle shaft 11 passes, and the open ends of the two positioning arm clearance grooves are opposite each other.

[0146] like Figure 23 and 24 As shown, this is one embodiment of the snap-lock positioning arm 503: the two snap-lock positioning arms 503 are offset along the axial direction of the snap-lock shaft 11, and are located on both sides of the snap-lock shaft 11; as shown Figure 23 As shown, the jump buckle positioning arm 503 includes a semi-circular positioning arm clearance groove through which the jump buckle shaft 11 passes, and the opening ends of the two positioning arm clearance grooves are arranged opposite each other.

[0147] like Figure 23 Figures 24 and 26 show one embodiment of the connection structure: Figure 23 and 24 As shown, the bracket 50 has a U-shaped structure, including a bracket connecting plate 502 and two bracket arms 501 that are bent and connected to both ends of the bracket connecting plate 502 respectively; as Figure 26 As shown, the two ends of the jump buckle shaft 11 are respectively connected to two support arms 501; as Figure 23 , 24As shown in Figure 26, the jump buckle 60 is rotatably mounted on the jump buckle shaft 11. The bracket 50 also includes two jump buckle positioning arms 503 located between two bracket arms 501 and spaced apart from each other. The two jump buckle positioning arms 503 are respectively arranged on both sides of the jump buckle 60 to block the jump buckle 60 and limit the range of movement of the jump buckle 60 along the extension direction of the jump buckle shaft 11 (that is, limit the position of the jump buckle 60 in the axial direction of the jump buckle shaft 11).

[0148] like Figure 17 -21 shows the fifth embodiment of the operating mechanism 100, as detailed below:

[0149] like Figure 17 As shown in Figure 21, the operating mechanism 100 includes a bracket 50, a rocker arm assembly and a jumper 60 pivotally mounted on the bracket 50, a first crank 30 pivotally mounted on the jumper 60 about a first axis 67m, and a first spring 22; one end of the jumper 60 is rotatably connected to the bracket 50, serving as the pivot end; the jumper 60 includes a jumper hole 605 for inserting a positioning pin 17, and the bracket 50 includes a bracket hole 508 for inserting a positioning pin 17; the jumper hole 605 and the bracket hole 508 are aligned. A spring shaft 46 is engaged with a jump stop 60 for limiting. One end of the first crank 30 swings away from the pivot end of the jump stop, making the distance between the first spring shaft 46 and the second spring shaft 16 less than or equal to the length of the first spring 22, forming a first assembly state. In the first assembly state, both ends of the first spring 22 are respectively assembled to the first spring shaft 46 and the second spring shaft 16, and the rocker arm assembly swings towards the pivot end of the jump stop, driving the first spring 22 and the first crank 30 to swing towards the pivot end of the jump stop, forming a second assembly state. The operating mechanism 100 of this embodiment can easily and quickly install the first spring 22 on the first spring shaft 46 and the second spring shaft 16, thereby improving the assembly efficiency of the operating mechanism 100 and saving assembly time and labor costs.

[0150] Specifically, such as Figure 17 As shown, when the jumper hole 605 and the bracket hole 508 are aligned, the first spring shaft 46 is engaged with the jumper 60, and one end of the first crank 30 swings away from the pivot end of the jumper until it is engaged with the jumper 60, a first assembly state is formed. Further, as... Figure 17 and 18 As shown, in the first assembly state, the two ends of the first spring 22 are respectively assembled to the first spring shaft 46 and the second spring shaft 16. After the rocker arm assembly swings away from the first spring shaft 46 and the axis of the first spring 22 swings past the first axis 67m, the first spring 22 drives the rocker arm assembly to swing to one end of its swing stroke, and at the same time drives the first crank 30 to swing towards the pivot end of the jumper until the first crank 30 is again in a limited engagement with the jumper 60. At this time, the assembly of the first spring 22 is completed, and the operating mechanism 100 enters the following state: Figure 20The second assembly state is shown. Further, as... Figure 17 As shown in directions -18 and 20-21, the right end of the jump buckle 60 is the jump buckle pivot end. "One end of the first crank 30 swings away from the jump buckle pivot end" means that the lower end of the first crank 30 swings clockwise. "The first crank 30 swings towards the jump buckle pivot end" means that the lower end of the first crank 30 swings counterclockwise.

[0151] Preferred, such as Figure 17 and 25 As shown, the jump catch 60 also includes a jump catch protrusion 66, which, in the first assembled state, defines the swing position of the first crank 30. Further, as... Figure 17 As shown, in the first assembled state, the snap-fit ​​protrusion 66 engages with the first crank 30 in a limiting fit. Further, as... Figure 17 and 18 As shown, the first spring shaft 46 and the second spring shaft 16 are located on both sides of the snap fastener 60; the snap fastener protrusion 66 is located between the snap fastener shaft 11 and the snap fastener hole 605, and the first axis 67m is located between the snap fastener protrusion 66 and the snap fastener pivot end. Specifically, as... Figure 17 and 18 In the indicated direction, the first spring shaft 46 and the second spring shaft 16 are located on the upper and lower sides of the snap fastener 60, respectively.

[0152] Preferred, such as Figure 17 , 18 As shown, the rocker arm assembly is disposed within the V-groove of the bracket 50, with the pivot end of the jump buckle located on one side of the V-groove, and the latch 13, the re-latch 15, and the bracket hole 508 located on the other side of the V-groove. The rocker arm 45 is pivotally disposed at the bottom of the V-groove. Specifically, as shown... Figure 17 In the direction shown in -18, the pivot end of the jump buckle is located on the right side of the V-groove, and the buckle 13, the re-buckle 15 and the bracket hole 508 are located on the left side of the V-groove.

[0153] like Figure 25 As shown, this is one embodiment of the jump buckle 60: The jump buckle 60 is a strip plate structure, with a jump buckle shaft hole 601 and a limiting shoulder 602 that cooperates with the bracket connecting plate 502 of the bracket 50 at one end, and a jump buckle hole 605 and a jump buckle platform 604 that cooperates with the locking buckle 13 at the other end. A jump buckle protrusion 66 and a jump buckle-crank shaft hole are provided in the middle. The jump buckle hole 605, the jump buckle protrusion 66, the jump buckle-crank shaft hole, and the jump buckle shaft hole 601 are arranged side by side with intervals. A driving side edge 603 and a limiting side edge 608 are respectively provided on both sides of the jump buckle 60 along its length direction. The driving side edge 603 and the limiting side edge 608 are located at both ends of the jump buckle 60 along its length direction.

[0154] Based on the operating mechanism 100 of the fifth embodiment, the present invention also provides an operating mechanism assembly method, which can easily and quickly complete the assembly of the first spring 220, thereby improving the assembly efficiency of the entire operating mechanism 100 and realizing automated assembly; the operating mechanism assembly method includes the following steps:

[0155] Step 1: Align the jumper hole 605 of the jumper 60 with the bracket hole 508 of the bracket 50 and insert the positioning pin 17 into the jumper hole 605 and the bracket hole 508, so that the operating mechanism enters the first assembly state.

[0156] Preferably, in step one, the jump buckle hole 605 and the bracket hole 508 are aligned and the positioning pin 17 is installed between them. The rocker arm 45 is swung away from the pivot end of the jump buckle so that the first spring shaft 46 is in a limiting engagement with the jump buckle 60. The first crank 30 is swung away from the pivot end of the jump buckle so that it is in a limiting engagement with the jump buckle 60, so that the operating mechanism 100 enters the first assembly state. At this time, the distance between the axis of the first spring shaft 46 and the axis of the second spring shaft 16 is less than or equal to the length of the first spring 22.

[0157] Step 2: In the first assembly state, assemble the two ends of the first spring 22 to the first spring shaft 46 and the second spring shaft 16 respectively; swing the rocker arm 45 in the direction of the jumper pivot end, and the rocker arm 45 drives the first spring 22 and the first crank 30 to rotate, so that the operating mechanism enters the second assembly state.

[0158] Preferably, in step two, the two ends of the first spring 22 are respectively assembled to the first spring shaft 46 and the second spring shaft 16; the rocker arm 45 is swung in the direction of the jump buckle pivot end, and the rocker arm 45 drives the first spring 22 to swing around the second spring shaft 16 through the first spring shaft 46. The axis of the first spring 22 swings past the rotation center of the first crank 30 (i.e., the first axis 67m). The first spring 22 drives the rocker arm 45 to swing to one end of the swing stroke of the rocker arm assembly. At the same time, the first spring 22 drives the first crank 30 to swing in the direction of the jump buckle pivot end until the first crank 30 is again in limited engagement with the jump buckle 60. The operating mechanism enters the second assembly state, and the first spring 22 is assembled.

[0159] Preferably, the assembly method of the operating mechanism of the present invention further includes step three: in the second assembly state, the reset structure 42 of the rocker arm assembly is assembled on the rocker arm 45, the positioning pin 17 is removed, and the first spring 22 drives the jump buckle 60 to rotate to engage with the reset structure 42.

[0160] Preferably, the assembly method of the operating mechanism of the present invention further includes steps four and five, the order of which can be interchanged: Step four, the slider 26 is assembled on the slide rail 25, and the two ends of the first connecting rod 27 are respectively rotatably assembled on the second spring shaft 16 and the slider 26. Step five, the latch 13 is pivotally mounted on the bracket 50 through the latch shaft 12, and the re-latch 15 is pivotally mounted on the bracket 50 through the re-latch shaft 14.

[0161] Preferably, the assembly method of the operating mechanism of the present invention further includes the following operations performed before step one: assembling the second spring shaft 16 onto the first crank 30, pivoting the first crank 30 around the first axis 67m onto the jump buckle 60, and pivoting the jump buckle 60 onto the bracket 50; assembling the first spring shaft 46 onto the rocker arm 45 of the rocker arm assembly, and pivoting the rocker arm 45 into the V-groove of the bracket 50.

[0162] Preferred, such as Figure 7 As shown in Figures 16 and 35, the moving contact mechanism further includes a contact spring 23. One end of the contact spring 23 is connected to the moving contact 9, and the other end is connected to the contact support 110. When the moving contact 9 and the stationary contact 18 are closed, a first force is applied to the moving contact 9, causing the moving contact 9 to press against the stationary contact 18. Further, as... Figure 7 As shown in Figures 16 and 35, one end of the contact spring 23 is connected to the moving contact 9 via the third spring shaft 201, and the other end is rotatably connected to the contact support 110 via the fourth spring shaft 202. Further, as... Figure 29 and 33 As shown, the moving contact 9 includes a moving conductive rod 90, which has a conductive rod groove 902 that cooperates with the third spring shaft 201.

[0163] Preferred, such as Figure 14 As shown in Figure 16, the contact spring 23 can also lock the moving contact 9. Specifically, the two ends of the contact spring 23 are the third end and the fourth end, respectively. The third end is connected to the moving contact 9, and the fourth end is connected to the contact support 110. The geometric axis of the contact spring 23 is the second axis, which coincides with the line connecting the third end and the fourth end. Figure 11As shown, when the moving contact 9 is normally closed or normally open, the second axis is located on one side of the third axis 111s, and the contact spring 23 keeps the moving contact 9 in the normally closed or normally open position. When the moving contact 9 is repelled by the electric repulsive force generated by the short-circuit current, the moving contact 9 rotates relative to the contact support 110, and the moving contact 9 drives the contact spring 23 to rotate around the fourth end of the spring, causing the second axis to swing to the other side of the third axis 111s, keeping the moving contact 9 in the temporary open position. The moving contact mechanism includes a contact support 110, a moving contact 9, and a contact spring 23. Its structure is simple. The contact spring 23 serves two purposes: firstly, it allows the moving contact 9 to overtravel, ensuring reliable contact between the moving contact 9 and the stationary contact 18; secondly, when the moving contact 9 is repelled by the electric repulsive force generated by the short-circuit current, the contact spring 23 locks the moving contact 9 in the temporary disconnected position. This prevents the moving contact 9 from rebounding after being repelled during a short-circuit fault, ensuring reliable disconnection between the moving contact 9 and the stationary contact 18. It should be noted that when the moving contact 9 is in the temporary disconnected position, if the operating mechanism 100 switches from the closing state to the opening state, the moving contact 9 automatically moves from the temporary disconnected position to the normal disconnected position.

[0164] Preferred, such as Figure 11 As shown, when the moving contact 9 and the stationary contact 18 are closed, a short-circuit current flows through them. Since the current direction in the moving contact 9 is opposite to the current direction in the part of the stationary contact 18 opposite to the moving contact 19, an electric repulsive force is generated between them, causing the moving contact 9 to be repelled.

[0165] Preferred, such as Figure 14 As shown in Figure 16, the moving contact 9 drives the contact spring 23 to rotate, causing the second axis to swing from one side of the third axis 111s to the other side, at which point the contact spring 23 passes through the second dead point position; as shown in Figure 16. Figure 15 As shown, when the contact spring 23 is in the second dead point position, the third axis 111s is located on the second axis.

[0166] Specifically, such as Figure 11 and 12 As shown, when the circuit breaker of the present invention is normally closed or normally opened, the contact spring 23 and the contact support 110 operate synchronously, and the two are relatively stationary. The second axis of the contact spring 23 is always kept on the same side of the third axis 111s. Only when the moving contact 9 and the stationary contact 18 are closed does a small-amplitude deformation occur, providing an overtravel force to the moving contact 9 to ensure that the moving contact 9 and the stationary contact 18 are tightly closed; as Figure 14In the direction shown in -16, when a short-circuit current flows through the circuit breaker of the present invention, the moving contact 9 will be repelled by the electric repulsive force generated by the short-circuit current, causing the moving contact 9 to rotate counterclockwise relative to the contact support 110 (since the operating mechanism is in the closed state, the contact support 110 remains stationary). The moving contact 9 (via the third spring shaft 201) drives the contact spring 23 to rotate counterclockwise around the fourth end of the spring, as shown in -16. Figure 15 As shown, when the contact spring 23 rotates to the second dead center position, the energy stored in the contact spring 23 reaches its maximum value, and the third axis 111s is located on the second axis, as... Figure 16 As shown, when the contact spring 23 rotates through the second dead point position, the second axis also rotates through the third axis 111s. Therefore, the third axis 111s can also be regarded as the second dead point position. That is to say, when the second axis rotates through the third axis 111s, the contact spring 23 rotates through the second dead point position. After the contact spring 23 rotates through the second dead point position, it releases energy and drives the moving contact 9 to rotate rapidly to the temporary breaking position, so that the moving contact 9 is kept in the temporary breaking position. Finally, the second axis moves from the lower side of the third axis 111s to the upper side of it.

[0167] The present invention also discloses a moving contact assembly, which can significantly improve the connection reliability between the conductor 70 and the moving contact 9, and realize a hard connection between the two, as detailed below:

[0168] like Figure 29 As shown in Figures -34, 45, and 46, the moving contact assembly includes a conductor 70, a non-elastic fastener 80, and a moving contact 9. The conductor 70 includes a first clamping arm 710 and a second clamping arm 711 arranged at a distance from each other. The moving contact 9 includes a moving conductive rod 90 and a moving contact 94. The moving contact 94 is disposed at one end of the moving conductive rod 90. The moving conductive rod 90 includes a conductive rod contact portion disposed at its other end. The conductive rod contact portion is inserted between the first clamping arm 710 and the second clamping arm 711 and is rotatably connected to the first clamping arm 710 and the second clamping arm 711, respectively. The fastener 80 is connected to the first clamping arm 710 and the second clamping arm 711, respectively, so that the first clamping arm 710 and the second clamping arm 711 clamp the conductive rod contact portion. Further, as... Figure 29 As shown in -34, 45-46, the conductor 70 also includes a conductor connecting plate 712, the two ends of which are bent and connected to the first clamping arm 710 and the second clamping arm 711 respectively.

[0169] Compared with existing technologies, such as the method of using double torsion springs to press the conductor and the moving contact in Japanese Patent JP3794163B2, the moving contact assembly of the present invention achieves a hard connection between the conductor 70 and the conductive rod 90 with its fastener 80. While ensuring that the moving conductive rod 90 has a certain degree of operational flexibility, it ensures a reliable structure and electrical connection between the contact part of the conductor 70 and the conductive rod.

[0170] It should be noted that the "non-elastic fastener 80" means that the fastener 80 will not undergo elastic deformation due to external force.

[0171] Preferred, such as Figure 30 , 31 As shown in Figures 34 and 45, the conductor 70 further includes a conductor connecting plate 712, the two ends of which are respectively bent and connected to the first clamping arm 710 and the second clamping arm 711; Figure 29 and 30 As shown, the fastener 80 is disposed between the conductive connecting plate 712 and the conductive rod contact portion, so that the first clamping arm 711 and the second clamping arm 710 tighten the conductive rod contact portion. Further, as... Figure 30 , 31 As shown in Figures 34 and 45, the conductive connecting plate 712, the first clamping arm 710, and the second clamping arm 711 are generally U-shaped. It should be noted that the clamping force of the first clamping arm 710 and the second clamping arm 711 on the movable conductive rod 90 can be adjusted by changing the length of the rivet body 802 and / or the position of the fastener 80 between the conductive connecting plate 712 and the movable conductive rod 90.

[0172] Preferred, such as Figure 30 , 31 As shown in Figures 34 and 45, both the first clamping arm 710 and the second clamping arm 711 include a straight clamping arm portion and a bent clamping arm portion. The two ends of the bent clamping arm portion are respectively bent and connected to the straight clamping arm portion and the conductive connecting plate 712. The two bent clamping arm portions respectively offset the straight clamping arm portions of the first clamping arm 710 and the second clamping arm 711 towards the center of the clamping arm connecting plate 712. Fasteners 80 are disposed on the two straight clamping arm portions and are fixedly connected to the two straight clamping arm portions respectively. The movable conductive rod 90 is rotatably connected to the two straight clamping arm portions. Further, as... Figure 31 and 34 As shown, the straight portion of the first clamping arm 710 is provided with a first clamping arm hole 7101 and a first clamping arm shaft hole 7102 (or a first clamping arm shaft platform 7103), and the straight portion of the second clamping arm 711 is provided with a second clamping arm hole 7111 and a second clamping arm shaft hole 7112 (or a second clamping arm shaft platform 7113).

[0173] Preferred, such as Figure 38 As shown, the unit housing 120 includes a terminal block slot 120-4 that is plugged into the conductive terminal block 700.

[0174] Preferred, such as Figure 31 As shown, with fastener 80 not installed, the distance between the first clamping arm 710 and the second clamping arm 711 is D1, as... Figure 30As shown, the thickness of the contact portion of the conductive rod is D0, and D1 ≥ D0. The phrase "in the state where the fastener 80 is not installed" refers to the state where the fastener 80 and the conductor 70 are not yet assembled together. At this time, the first clamping arm 710 and the second clamping arm 711 are in an initial free state and are not constrained by the fastener 80.

[0175] Preferred, such as Figure 30 and 45 As shown, the inner sidewall of the first clamping arm 710 is in point contact or line contact with the conductive rod contact portion, and the inner sidewall of the second clamping arm 711 is in surface contact with the conductive rod contact portion. The contact methods of the first clamping arm 710 and the second clamping arm 711 with the conductive rod contact portion are beneficial to increasing the contact area between the conductor 70 and the moving contact 9, improving the conductivity of the moving contact mechanism, and maintaining the mobility between the two.

[0176] Preferred, such as Figure 30 and 45 As shown, one end of the fastener 80 is fixedly connected or latched to the first clamping arm 710, and the other end is fixedly connected to the second clamping arm 711. Further, the fastener 80 is a rivet, with one end being a rivet head 801, which is latched to the first clamping arm 710, and the other end being a riveting end 803, which is fixedly connected to the second clamping arm 711.

[0177] Preferred, such as Figure 32 As shown, the fastener 80 is a rivet. Further, as... Figure 32 As shown, this is one embodiment of the fastener 80: the fastener 80 includes a rivet head 801, a rivet body 802, and a riveting end 803 arranged sequentially. The outer diameter of the rivet head 801 is larger than the outer diameter of the rivet body 802. A first annular platform 804 is formed at the connection between the rivet head 801 and the rivet body 802. The outer diameter of the rivet body 802 is larger than the outer diameter of the riveting end 803. A second annular platform 805 is formed at the connection between the rivet body 802 and the riveting end 803. Figure 30 and 45 As shown, the first ring platform 804 is in a limiting fit with the first clamping arm 710, and the rivet body 802 passes through the first clamping arm 710 so that the second ring platform 805 contacts the second clamping arm 711. The thickness of the first clamping arm 710 is D3, and the length of the rivet body (802) is L0, where L0 < D1 + D3.

[0178] It should be pointed out that, such as Figure 30 and 45As shown, the inner wall of the first clamping arm 710 is in line or point contact with the contact portion of the conductive rod, and the second clamping arm 711 is in surface contact with the contact portion of the conductive rod. The reason for the above contact method is that when the rivet is riveted, the second ring platform 805 is in surface contact with the second clamping arm 711. Therefore, the rivet head 801 will cause the connection (bend 720) between the first clamping arm 710 and the conductive body connecting plate 712 to deform, causing the first clamping arm 710 to tilt in the direction of the second clamping arm 711. Thus, the first clamping arm 710 is in line or point contact with the moving conductive rod 90, while the moving conductive rod 90 is in surface contact with the second clamping arm 711. This significantly increases the contact area between the contact portion of the conductive rod and the conductive body 70, improves the conductivity of the moving contact mechanism, reduces the heat generation during the conductive process of the moving contact assembly, and extends the service life of the moving contact assembly.

[0179] Preferred, such as Figure 31 and 34 As shown, the first clamping arm 710 is provided with a first clamping arm hole 7101 for the rivet body 802 to pass through, and the second clamping arm 711 is provided with a second clamping arm hole 7111 for the riveting end 803 to pass through. The inner diameter of the first clamping arm hole 7101 is larger than the inner diameter of the second clamping arm hole 7111.

[0180] like Figure 31 As shown, this is a first connection method between the movable conductive rod 90 and the conductive body 70: the first clamping arm 710 is further provided with a first clamping arm shaft hole 7102, and the second clamping arm 711 is provided with a second clamping arm shaft hole 7112; as Figure 30 As shown, the moving contact assembly also includes a contact shaft 10 with both ends inserted into the first clamping arm shaft hole 7102 and the second clamping arm shaft hole 7112, respectively. The moving conductive rod 90 has a strip-shaped structure, with one end being a conductive rod contact portion, which is rotatably mounted on the contact shaft 10. Furthermore, the moving contact mechanism includes two contact springs 23, which are respectively disposed on both sides of the moving contact 9. One end of each contact spring 23 is connected to the moving contact 9 via a third spring shaft 201, and the other end is connected to the contact support 110 via a fourth spring shaft 202.

[0181] like Figure 34 As shown, this is a second connection method between the conductive rod 90 and the conductive body 70: the first clamping arm 710 is further provided with a first clamping arm pivot 7103, and the second clamping arm 711 is further provided with a second clamping arm pivot 7113; the movable conductive rod 90 is a strip plate structure, with one end being a conductive rod contact portion, the conductive rod contact portion being provided with a conductive rod shaft hole 901, and the first clamping arm pivot 7103 and the second clamping arm pivot 7113 being inserted into the conductive rod shaft hole 901. Further, as... Figure 34As shown, the first clamping arm pivot 7103 and the second clamping arm pivot 7113 are both annular platforms, formed by stamping the first clamping arm 710 and the second clamping arm 711 relative to each other. The first clamping arm pivot 7103 and the second clamping arm pivot 7113 help to increase the contact area between the conductor 70 and the moving conductive rod 90. Further, the moving contact mechanism includes two contact springs 23, which are respectively disposed on both sides of the moving contact 9. One end of each contact spring 23 is connected to the moving contact 9 through a third spring shaft 201, and the other end is connected to the contact support 110 through a fourth spring shaft 202.

[0182] like Figure 45 and 46 As shown, this is a third connection method between the conductive rod 90 and the conductive body 70: the movable conductive rod 90 further includes a conductive rod body 90-2, one end of which is provided with a movable contact 94, and the other end is connected to the conductive rod contact portion; the conductive rod contact portion includes a contact portion base plate and two conductive rod contact plates 907 that are bent and connected to both ends of the contact portion base plate and are arranged at relative intervals. The first clamping arm 710 and the second clamping arm 711 are rotatably connected to the two conductive rod contact plates 907 through a contact shaft 10. Further, as... Figure 45 and 46 As shown, the conductive rod contact portion has a U-shaped structure. The conductive rod body 90-2 is connected to the middle of one side of the contact portion base plate and is located on both sides of the contact portion base plate with the conductive rod contact plate 907. The moving contact mechanism includes at least one contact spring 23, which is located between the two conductive rod contact plates 907. One end of the contact spring 23 is connected to the moving contact 9 through a third spring shaft 201, and the other end is connected to the contact support 110 through a fourth spring shaft 202. Further, as... Figure 46 As shown, each of the two conductive rod contact plates 907 is provided with a moving contact slot 902 that cooperates with the third spring shaft 203.

[0183] Preferred, such as Figure 11 As shown in Figures 16, 35, 37, 40, and 45, the moving contact mechanism also includes a moving contact insulator 140. The moving contact insulator 140, in conjunction with the moving contact 9, significantly increases the insulation gap and creepage distance between the moving contact 9 and the stationary contact 18. Furthermore, the moving contact insulator 140 prevents arc particles generated when the moving contact 9 and stationary contact 18 break from entering the contact support 110, adhering to the contact spring 23 and affecting its elasticity, or adhering to the rotating shaft of the moving contact 9 and affecting its operating performance. The following is one implementation of the moving contact insulator 140:

[0184] The moving contact insulation component 140 includes an insulation component body, which includes an insulation component base plate 140-9 and an insulation component sidewall 140-1. A moving contact receiving cavity 140-2 for accommodating the moving contact 9 is formed in the middle of the insulation component body. The moving contact insulation component also includes a main baffle 140-4 and a main isolation plate 140-5. The main baffle 140-4 is disposed outside the insulation component base plate 140-9 and extends downward. The main isolation plate 140-5 is perpendicularly connected to the insulation component sidewall 140-4 and protrudes outside the insulation component sidewall 140-4. The main isolation plate 140-5 extends along the length direction of the insulation component body. The moving contact insulation component 140 has a simple structure and is easy to assemble. It can significantly improve the insulation performance of the moving contact 9 and increase the creepage distance between the moving contact 9 and the stationary contact 18. Further, as... Figure 35 and 37 As shown, the main isolation plate 140-5 extends from one end of the insulating body to the other end. Specifically, as... Figure 35 and 37 As shown, one end of the insulating component body is close to the moving contact of the moving contact 9, which is the first end of the body, and the other end of the insulating component body is the second end of the body. The main isolation plate 140-5 extends from the first end of the body to the second end of the body.

[0185] Preferred, such as Figure 37 As shown, the main baffle 140-4 and the main isolation plate 140-5 are an integral structure. Furthermore, as... Figure 37 As shown, the main baffle 140-4, the main isolation plate 140-5, and the main body of the insulating component are an integral structure.

[0186] Preferred, such as Figure 37 As shown, the two insulating sidewalls 140-1 are arranged opposite to each other, and each side of the insulating body is provided with a main isolation plate 140-5. The two main isolation plates 140-5 are respectively vertically arranged on both sides of the two insulating sidewalls 140-4 and protrude towards both sides of the two insulating sidewalls 140-1. One end of each main isolation plate 140-5 is connected to one end of a main baffle 140-4. Further, as Figure 37 As shown, the cross-section of the main body of the insulating component is U-shaped, and the main baffle 140-4 and the main isolation plate 140-5 are U-shaped as a whole, surrounding the outside of the main body of the insulating component.

[0187] Specifically, such as Figure 37In the indicated direction, the moving contact receiving cavity 140-2 is located on the upper side of the insulating base plate 140-9 (also the inner side of the insulating base plate 140-9). The two main isolation plates 140-5 are vertically connected to the left and right sides of the two insulating side walls 140-1 respectively. The main baffle 140-4 is located on the lower side of the insulating base plate 140-9 (also the outer side of the insulating base plate 140-9) and extends downwards from the insulating base plate 140-9. The main isolation plates 140-5 extend from the front end of the insulating body to the rear end of the insulating body (i.e., both ends of the length direction of the insulating body).

[0188] Preferred, such as Figure 35 and 37 As shown, the main isolation plate 140-5 is generally flared in shape, with the opening of the flared shape facing outwards from the insulating base plate 140-9. Furthermore, the opening direction of the flared shape of the main isolation plate 140-5 is opposite to the opening direction of the moving contact receiving cavity 140-2. Specifically, as... Figure 37 As shown, the opening of the flared mouth shape faces downwards, and the opening of the moving contact receiving cavity 140-2 faces upwards.

[0189] Preferred, such as Figure 35 and 37 As shown, the main isolation plate 140-5 includes an isolation plate head 140-50, an isolation plate neck 140-51, an isolation plate belly 140-52, and an isolation plate tail 140-53 connected in sequence. One end of the isolation plate tail 140-53 is connected to the main baffle 140-4. The isolation plate head 140-50 is located near the moving contact 94 of the moving contact 9. Further, as... Figure 35 and 37 As shown, the upper side of the partition plate belly 140-52 is flush with the opening side of the moving contact receiving cavity 140-2.

[0190] like Figure 14As shown in Figures 16, 35, and 37, one embodiment of the cooperation between the moving contact 9, the moving contact insulating member 140, and the contact support 110 is as follows: the moving conductive rod 90 of the moving contact 9 is inserted into the moving contact receiving cavity 140-2, and the moving contact 9 and the moving contact insulating member 140 form a first assembly; the contact support 110 has a support assembly cavity 110-0 in the middle, and the first assembly and the contact spring 23 are respectively disposed in the support assembly cavity 110-0, and the insulating member base plate 140-9 and the support assembly cavity are connected. The support bottom wall 110-9 of 110-0 abuts against each other; the moving contact insulating member 140 protrudes from one end of the support assembly cavity 110-9 on one side of the contact support 110. When the moving contact 9 rotates relative to the contact support 110 due to the electric repulsive force generated by the short-circuit current, the moving contact 9 drives the moving contact insulating member 140 to rotate synchronously, so that an exposure gap is formed between the insulating member bottom plate 140-9 and the bottom wall of the support assembly cavity 110-9. The main baffle 140-4 blocks the exposure gap on one side of the contact support 110.

[0191] Specifically, such as Figure 14 In the direction shown, when a short-circuit current flows through the circuit breaker of the present invention, the huge electric repulsive force causes the moving contact 9 to be repelled and rotate counterclockwise, forming an exposed gap with an angle of θ between the insulating base plate 140-9 and the support base wall 110-9. When the moving contact 9 and the stationary contact 18 initially separate, a large number of arc particles will be generated. The main baffle 140-4 is located on the right side of the contact support 110 and blocks the exposed gap, thereby preventing the arc particles from entering the contact support assembly cavity through the exposed gap and depositing on the contact spring 23 and / or the contact shaft 10, which would affect the operating performance of the moving contact mechanism.

[0192] Preferred, such as Figure 37 As shown, the moving contact insulation component also includes a secondary baffle 140-7. Secondary baffles 140-7 are provided on both sides of the main body of the insulation component. The secondary baffles 140-7 and the main baffle 140-5 are arranged side-by-side with intervals, and the secondary baffles 140-7 and the main isolation plate 140-5 are respectively located on both sides of the main baffle 140-4. The secondary baffles 140-7 are perpendicularly connected to the side wall 140-1 of the insulation component and protrude outwards from the side wall 140-1. One end of each secondary baffle 140-7 protrudes from one side of the bottom plate 140-9 of the insulation component, forming a secondary baffle protrusion. The secondary baffle protrusions located on both sides of the main body of the insulation component are connected to each other. Further, as... Figure 37 As shown, the two sub-baffles 140-7 are respectively vertically arranged on both sides of the two insulating sidewalls 140-2 and protrude to both sides of the two insulating sidewalls 140-2. One end of the two sub-baffles 140-70 protrudes on one side of the insulating bottom plate 140-9 and is connected to each other, so that the two sub-baffles 140-70 form a U-shaped structure.

[0193] Specifically, such as Figure 37In the indicated direction, the secondary baffle 140-7 is disposed at the rear end of the main body of the insulating component and is perpendicularly connected to the left and right sides of the side wall 140-1 of the insulating component. The lower ends of the two secondary baffles 140-7 protrude from the lower side of the bottom plate 140-9 of the insulating component and are connected as one piece. The secondary baffle 140-7 is located behind the main baffle 140-4 and is arranged side by side with it. The upper end of the secondary baffle 140-7 is flush with the opening side of the moving contact receiving cavity 140-2.

[0194] Preferred, such as Figure 36 As shown, the sub-baffle 140-7 is located within the support assembly cavity 110-0, and cooperates with the side wall of the support assembly cavity 110-0 to cover the exposed gap. Further, as... Figure 37 As shown, the contact support 110 includes two support ribs disposed at one end of the support assembly cavity 110-0 and spaced apart from each other. The two support ribs are formed by bending one end of each side wall of the support assembly cavity 110 inwards. The two support ribs are respectively offset from and cooperate with two auxiliary baffles 140-7, blocking the exposure gap. The auxiliary baffles 140-7 cooperate with the contact support 110 to further prevent arc particles generated during the separation of the moving and stationary contacts from entering the support assembly cavity 110-0 through the exposure gap, which helps to extend the service life of the moving contact mechanism.

[0195] Preferred, such as Figure 35 As shown, the insulating component body includes a first body section and a second body section that are bent and connected together. The main insulating plate 140-5 and the main baffle 140-4 are respectively connected to the first body section, and the auxiliary baffle 140-7 is connected to the second body section. Further, as... Figure 35 As shown, the main body of the insulating component has a U-shaped structure, and the shape of the main body of the insulating component matches the shape of the moving conductive rod 90 of the moving contact 9.

[0196] Preferred, such as Figure 37 As shown, the insulating body includes a first connecting hole 140-3 and a tail connecting hole 140-6 respectively disposed at its two ends, for inserting a first connecting pin and a tail connecting pin to fix the insulating body and the moving contact 9 together. Further, as... Figure 35 As shown, when the moving contact 9 and the moving contact insulating component 140 are assembled, the moving conductive rod 90 of the moving contact 9 is inserted into the moving contact receiving cavity 140-2, as shown. Figure 33 As shown, the moving conductive rod 90 includes a first moving contact connection hole 905 and a second moving contact connection hole 903 respectively disposed at its two ends. The first moving contact connection hole 905 is aligned with the first connection hole 140-3, and the first connecting pin is inserted into the two. The second moving contact connection hole 903 is aligned with the tail connection hole 140-6, and the tail connecting pin is inserted into the two, thereby realizing the fixed connection between the moving contact 9 and the moving contact insulating member 140. The moving contact 9 and the moving contact insulating member 140 form the first component.

[0197] like Figure 33 The image shows a first embodiment of the moving contact 9. In this embodiment, the moving contact 9 is a single-break moving contact: the moving contact 9 includes a moving conductive rod 90 and a moving contact 94. The moving conductive rod 90 has a strip-shaped structure, with the moving contact 94 at one end and a conductive rod contact portion at the other end. The moving conductive rod 90 has a first moving contact connection hole 905, a second moving contact connection hole 903, and a moving contact shaft hole 901. The first moving contact connection hole 905 and the moving contact shaft hole 901 are respectively located at both ends of the moving conductive rod 90. The second moving contact connection hole 903 is located in the middle of the moving conductive rod 90 and close to the moving contact shaft hole 901. The moving conductive rod 90 also has a moving contact slot 902, and the conductive rod contact portion has a contact protrusion 906. Furthermore, the moving conductive rod 90 has a U-shaped structure, matching the shape of the insulating body.

[0198] Preferably, the conductive rod contact portion is a circular plate structure, and the contact protrusion 906 that drives and cooperates with the first push rod 150 is disposed on the circumferential sidewall of the conductive rod contact portion.

[0199] It should be noted that the moving contact 9 of the first embodiment is suitable for the connection methods of the first and second moving contacts 9 and the conductor 70.

[0200] like Figure 46 The image shows a second embodiment of the moving contact 9. In this embodiment, the moving contact 9 is a single-break moving contact: the moving contact 9 includes a moving conductive rod 90 and a moving contact 94. The moving conductive rod 90 includes a conductive rod body 90-2 and a conductive rod contact portion. One end of the conductive rod body 90-2 is provided with the moving contact 94, and the other end is connected to the conductive rod contact portion. The conductive rod contact portion has a U-shaped structure, including a contact portion base plate and two conductive rod contact plates 907 that are bent and connected to both ends of the contact portion base plate and are arranged at relative intervals. The conductive rod body 90-2 is connected to the middle of one side of the contact portion base plate and is located on both sides of the contact portion base plate with the conductive rod contact plates 907. The two ends of the conductive rod body 90-2 are respectively provided with a first moving contact connection hole 905 and a second moving contact connection hole 903 (not shown in the figure). A moving contact groove 902 is provided at one edge of the connection end between the conductive rod contact plate 907 and the contact portion base plate.

[0201] It should be noted that the moving contact 9 of the second embodiment is suitable for the third connection method between the moving contact 9 and the conductive rod 70.

[0202] like Figure 10The image shows a third embodiment of the moving contact 9. In this embodiment, the moving contact 9 is a double-break moving contact: the moving contact 9 has a centrally symmetrical structure, including a moving conductive rod 90 and two moving contacts 94 respectively disposed at both ends of the moving conductive rod 90, namely the first moving contact 94-0 and the second moving contact 94-1, which are used in conjunction with two stationary contacts 18 (the two stationary contacts 18 are the first stationary contact 18-0 and the second stationary contact 18-1, respectively). Rotation of the moving contact 9 simultaneously achieves closing / opening with the two stationary contacts 18. In this embodiment, the moving contact 9 does not need to be electrically connected through the conductor 70, but is directly disposed on the contact support 110.

[0203] like Figure 11 and 38 As shown, this is one embodiment of the stationary contact 18: the stationary contact 18 includes a stationary contact bridge 18-1 and a stationary contact 18-0 disposed at one end of the stationary contact bridge 18-1; the stationary contact bridge 18-1 includes a U-shaped part and a bent part, the bent part has a U-shaped structure, the stationary contact 18-0 is disposed on one side arm of the U-shaped part, the bent part includes a first plate and a second plate that are bent and connected, the two ends of the first plate are bent and connected to the U-shaped part and the second plate respectively, and the second plate is arranged parallel to the side arm of the U-shaped part.

[0204] like Figure 36 As shown, this is one embodiment of the contact support 110: The contact support 110 has a semi-cylindrical structure, including two support sidewalls 110-4, a support bottom wall 110-9, and a support assembly cavity 110-0 arranged at relatively intervals. The two ends of the support bottom wall 110-9 are respectively bent and connected to the two support sidewalls 110-4. The support assembly cavity 110-0 is formed between the two support sidewalls 110-4. One end of the two support sidewalls 110-4 is bent inward to form two support mating ribs arranged at relatively intervals. The inner side of the other end of the two support sidewalls 110-4 is provided with two support slots 110-2 that mate with the two ends of the fourth spring shaft 202. The support sidewall 110-4 is a semi-circular plate structure with a support shaft groove 111 at its outer center. One radial end of the support sidewall 110-4 is provided with a support connection hole 110-5.

[0205] like Figure 39 As shown in Figure 44, the present invention also discloses a fast tripping device, which causes the operating mechanism 100 to trip quickly when the moving contact 9 is opened due to a short circuit fault in the circuit breaker, thereby preventing the moving contact 9 and the stationary contact 18 from closing again; and will not trip the operating mechanism 100 during the normal opening / closing process of the moving contact 9 and the stationary contact 18; as detailed below.

[0206] like Figure 39As shown in Figure 44, the fast tripping device includes an operating mechanism 100, a moving contact mechanism, and a stationary contact 18. The moving contact mechanism includes a contact support 110 and a moving contact 9. The operating mechanism 100 is driven and connected to the moving contact mechanism, causing the moving contact 9 to close or open with the stationary contact 18. The fast tripping device also includes a first push rod 150 pivotally mounted on the contact support 110. The first push rod 150 includes a first push rod driven end and a first push rod driven end. The first push rod driven end is driven and engaged with the moving contact 9, and the first push rod driven end is engaged with the operating mechanism 100 to trip it. A driving gap is provided between the first push rod driven end and the moving contact 9. When the moving contact 9 is repelled by the electric repulsive force generated by the short-circuit current, the moving contact 9 rotates relative to the contact support 110. After the moving contact 9 rotates through the driving gap, it contacts the first push rod driven end, and the moving contact 9 drives the first push rod 150 to rotate, causing the operating mechanism 100 to trip. In this invention, the moving contact 9 and the contact support 110 rotate synchronously. Therefore, during the normal closing or opening of the moving contact 9 and the stationary contact 18 by the rotation of the moving contact mechanism, the driving gap between the driven end of the first push rod and the moving contact 9 remains unchanged. When the moving contact 9 and the stationary contact 18 come into contact, a rebound will occur. Due to the existence of the driving gap, a certain buffer space can be provided for the reasonable vibration generated when the moving contact 9 and the stationary contact 18 are closed, thus avoiding the malfunction of the fast trip device. When a short circuit fault occurs, the moving contact 9 is quickly repelled by the electric repulsive force through the first push rod 150, the intermediate transmission structure and the second push rod 18. The second push rod 18 drives the latch 15 to release the limiting engagement with the latch 13, so that the latch 13 releases the latch engagement with the trip latch 60, and the circuit breaker can be quickly tripped.

[0207] Specifically, such as Figure 39 As shown, when the circuit breaker of the present invention is normally closed / opened, the contact support 110 drives the first push rod 150 and the moving contact 9 to rotate synchronously clockwise / counterclockwise. Therefore, a driving gap is always maintained between the first push rod 150 and the moving contact 9, and the fast tripping device will not be triggered. In particular, when the circuit breaker of the present invention is normally closed, due to the hard contact between the moving contact 9 and the stationary contact 18, the moving contact 9 will rebound to a certain extent. Due to the existence of the driving gap, when the moving contact 9 rebounds, it will not contact the first push rod 150, and therefore will not drive the fast tripping device. Figure 40 As shown, when a short-circuit current flows through the circuit breaker of the present invention, the huge electric repulsive force causes the moving contact 9 to be repelled. Its rotation angle is much greater than the rebound amplitude that occurs when the moving contact 9 and the stationary contact 18 are closed. Therefore, the moving contact 9 will rotate through the drive gap and contact the driven end of the first push rod and drive the first push rod 150 to rotate. The driving end of the first push rod drives the operating mechanism 100 to disengage (that is, the latch 13 and the trip latch 60 are released from the latch engagement), thereby causing the circuit breaker to trip or open quickly and preventing the moving contact 9 and the stationary contact 18 from closing again.

[0208] It should be noted that the "moving contact repelling the short-circuit current by 9 times" means that when the short-circuit current flows through the closed moving contact 9 and the U-shaped stationary contact 18, a large electrodynamic repulsion force is generated between the moving contact 9 and the stationary contact 18 due to the short-circuit current in the opposite direction in the U-shaped stationary contact 18, causing the moving contact 9 and the stationary contact 18 to break apart.

[0209] Preferably, the driven end of the first push rod includes a driven protrusion or a driven groove.

[0210] Preferably, the moving contact 9 includes a drive groove or a drive protrusion.

[0211] Specifically, the first push rod's driven end and the moving contact 9 can cooperate through a driven protrusion and a driving protrusion, or through a driven groove and a driving protrusion, or through a driven groove and a driving groove, or through a driven protrusion and a driving groove.

[0212] Preferred, such as Figure 39 As shown in Figure 40, the moving contact 9 includes a moving conductive rod 90, which includes a contact protrusion 906 that drives and cooperates with the first push rod 150. A driving gap is provided between the contact protrusion 906 and the driven end of the first push rod. Further, as... Figure 40 As shown, the first push rod 150 is pivotally mounted on the contact support 110 at its center, and includes a first push rod driven arm 150-1 (the driven end of the first push rod) and a first push rod driving arm 150-2 (the driving end of the first push rod) respectively disposed at its two ends, which drive and cooperate with the moving contact 9 and the intermediate transmission structure respectively. A driving gap is provided between the first push rod driven arm 150-1 and the contact protrusion 906. Further, as Figure 40 As shown, the first push rod 150 further includes a first push rod mounting portion 150 pivotally mounted on the contact support 110, with one end of the first push rod driven arm 150-1 and the first push rod receiving arm 150-2 respectively connected to the first push rod mounting portion 150. Further, as... Figure 39 and 40 As shown, the first push rod 150 is pivotally mounted on the contact support 110 via the fourth spring shaft 202.

[0213] Preferred, such as Figure 39 As shown in Figure 42, the fast tripping device further includes an intermediate transmission structure and a second push rod 180. The driving end of the first push rod is driven to cooperate with the second push rod 180 through the intermediate transmission structure. The second push rod 180 is driven to cooperate with the operating mechanism 100, driving the operating mechanism 100 to trip. Further, as... Figure 41 As shown, the second push rod 180 engages with the re-clamp 15 of the operating mechanism 100.

[0214] Preferred, such as Figure 39As shown in Figure 42, the intermediate transmission structure includes a first intermediate push rod 160, a first intermediate shaft 161, a second intermediate push rod 170-1, and a second intermediate shaft 170-2. The first intermediate push rod 160 is driven by a first push rod drive end. The first intermediate shaft 161 is rotatably arranged around its axis. The first intermediate push rod 160 and the second intermediate push rod 170-1 are respectively fixedly connected to the first intermediate shaft 161, so that the first intermediate push rod 160, the first intermediate shaft 161, and the second intermediate push rod 170-1 rotate synchronously. One end of the second intermediate shaft 170-2 is connected to the second intermediate push rod 170-1, and the other end is driven by a second push rod 180. Further, as... Figure 39 As shown in Figure 42, the first intermediate shaft 161 is inserted into the unit housing 120, and its inner and outer ends are respectively connected to the first intermediate push rod 160 and the second intermediate push rod 170-1. Further, as... Figure 38 As shown, the unit housing 120 is provided with an intermediate shaft insertion hole 120-8 for inserting the first intermediate shaft 161. It should be noted that the first intermediate shaft 161 can also be rotatably mounted on the bracket 50 of the operating mechanism 100.

[0215] Preferred, such as Figure 42 As shown, the first intermediate shaft 161 has a shaft limiting plane 161-0 at one end, and the second intermediate push rod 170 has a second intermediate push rod hole 170. The side wall of the second intermediate push rod hole 170 has a hole limiting plane, which is limited and matched with the shaft limiting plane 161-0.

[0216] Preferred, such as Figure 40 As shown in Figure -42, the first intermediate push rod 160 includes a first intermediate push rod driven arm 160-1 and a first intermediate push rod limiting arm 160-2 that are driven and cooperate with the first push rod 150; as Figure 39 and 40 As shown, the fast tripping device also includes a push rod limiting protrusion 120-9 that cooperates with the first intermediate push rod limiting arm 160-2 for limiting. Further, as... Figure 40 As shown in Figure 42, the middle part of the first intermediate push rod 160 is fixedly connected to the first intermediate shaft 161.

[0217] Preferred, such as Figure 39 and 40 As shown, the first push rod 150 and the push rod limiting protrusion 120-9 are located on both sides of the first intermediate push rod 160. Further, as... Figure 40 As shown in Figure 42, the push rod limiting protrusion 120-9 is disposed on the unit housing 120. It should be noted that the position of the push rod limiting protrusion 120-9 is not limited to the one mentioned above, as long as it can limit the swing amplitude of the first intermediate push rod 160.

[0218] Preferred, such as Figure 41 As shown, the second push rod 180 has a triangular plate-like structure. One apex has a push rod receiving hole 180-2 for the second intermediate shaft 170-2 to be inserted and driven. The second apex is pivotally mounted via the second push rod shaft 4. The third apex has a push rod driving finger 180-1 that drives the re-clamp 15. Further, as... Figure 41 As shown, the second push rod 180 is pivotally mounted on the outside of the unit housing 120 via the second push rod shaft 4.

[0219] Preferably, the re-clamp 15 includes a re-clamping driven post 15-9 that is driven to cooperate with the second push rod 180, and the re-clamping driven post 15-9 is driven to cooperate with the push rod driving finger 180-1.

[0220] Preferred, such as Figure 41 As shown, the first intermediate shaft 161 is inserted into the unit housing 120, with its two ends located inside and outside the unit housing 120, respectively; the first push rod 150 and the first intermediate push rod 160 are respectively disposed inside the unit housing 120, and the second intermediate push rod 170-1, the second intermediate shaft 170-2, and the second push rod 180 are respectively disposed outside the unit housing 120.

[0221] Preferred, such as Figure 44 As shown, the circuit breaker of the present invention includes multiple circuit breaking poles 300 arranged side by side. Each circuit breaking pole includes an independent first push rod 150, a first intermediate push rod 160, a first intermediate shaft 161, a Deere intermediate push rod 170-1, and a second intermediate shaft 170-2. Further, as... Figure 44 As shown, each of the circuit breakers includes an independent second push rod 180; or two adjacent circuit breakers share a second push rod 180.

[0222] Specifically, such as Figure 44 As shown, the circuit breaker of the present invention includes three circuit breaking poles 300 arranged side by side. The left and middle circuit breaking poles 300 share a second push rod 180, while the right circuit breaking pole 300 includes an independent second push rod 180.

[0223] Preferred, such as Figure 38 and 43 As shown, each of the unit housings 120 includes a first connecting lug 120-1 and a second connecting lug 120-3 disposed on one side wall of the unit housing; the second push rod shaft 4 passes through each of the second connecting lugs 120-3 to connect the unit housings 120 together; the circuit breaker also includes a second connecting shaft 4a, which passes through the bracket 50 of the operating mechanism 100 and each of the first connecting lugs 120-1 to connect the operating mechanism 100 and the unit housing 120 together.

[0224] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An operating mechanism for a circuit breaker, comprising a bracket (50), a rocker arm assembly and a trip latch (60) pivotally mounted on the bracket (50), a first crank (30) pivotally mounted on the trip latch (60) about a first axis (67m), and a first spring (22); one end of the first spring (22) is rotatably connected to the rocker arm assembly via a first spring shaft (46), and the other end is rotatably connected to the first crank (30) via a second spring shaft (16); one end of the trip latch (60) is rotatably connected to the bracket (50) and is the pivot end of the trip latch; the other end of the trip latch (60) is used to engage with a latch (13) pivotally mounted on the bracket (50), and the middle part is rotatably connected to the first crank (30); the first spring (22) has a first dead point position, and the first spring (22) stores energy to its maximum value at the first dead point position; Its features are: The jump buckle (60) includes a jump buckle hole (605) for inserting the positioning pin (17), and the bracket (50) includes a bracket hole (508) for inserting the positioning pin (17). In the first assembly state, the operating mechanism is aligned with the positioning pin (17) inserted into the jump buckle hole (605) and the bracket hole (508), and the first spring shaft (46) is in a limiting engagement with the jump buckle (60). One end of the first crank (30) swings away from the pivot end of the jump buckle to be in a limiting engagement with the jump buckle 60. The distance between the first spring shaft (46) and the second spring shaft (16) is less than or equal to the length of the first spring (22). The two ends of the first spring (22) are respectively assembled to the first spring shaft (46) and the second spring shaft (16). When the rocker arm (45) swings in the direction of the pivot end of the jumper to put the operating mechanism into the second assembly state, the first spring (22) passes through the first dead point position.

2. The operating mechanism of the circuit breaker according to claim 1, characterized in that: The jumper (60) also includes a jumper protrusion (66), which, in the first assembled state, defines the swing position of the first crank (30).

3. The operating mechanism according to claim 2, characterized in that: The buckle protrusion (66) is located between the buckle hole (605) and the buckle pivot end.

4. The operating mechanism according to any one of claims 1-3, characterized in that: The operating mechanism further includes a latch (13) and a re-latch (15) respectively pivotally mounted on the bracket (50), the re-latch (15) being in a limiting engagement with the latch (13), and the latch (13) being in a locking engagement with the jumper (60); the rocker arm assembly includes a synchronously moving handle (41), a rocker arm (45) fixedly connected to the handle (41), and a reset structure (42) for driving the jumper (60) to rotate so that it re-locks with the latch (13), the rocker arm (45) being pivotally mounted on the bracket (50); the first crank (30) includes a crank limiting part (31), and when the operating mechanism is in the closed or disengaged state, the crank limiting part (31) is in a limiting engagement with the jumper (60).

5. The operating mechanism according to claim 4, characterized in that: The bracket (50) includes a V-groove, a rocker arm assembly is disposed in the V-groove, the jump buckle pivot end is located on one side of the V-groove, the lock (13), the re-lock (15) and the bracket hole (508) are located on the other side of the V-groove, and the rocker arm (45) is pivotally disposed at the bottom of the V-groove.

6. The operating mechanism according to claim 4, characterized in that: The operating mechanism also includes a slide rail (25), a slider (26), and a first connecting rod (27). The slider (26) is slidably mounted on the slide rail (25). One end of the first connecting rod (27) is rotatably connected to the first crank (30) via a second spring shaft (16), and the other end is rotatably connected to the slider (26). When the operating mechanism is in the open or tripped state, the slide rail (25) and the slider (26) are in a limiting cooperation to prevent it from sliding.

7. A method for assembling the operating mechanism of a circuit breaker, used for assembling the operating mechanism according to any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Align the jumper hole (605) of the jumper (60) and the bracket hole (508) of the bracket (50) and insert the positioning pin (17) into the jumper hole (605) and the bracket hole (508) to put the operating mechanism into the first assembly state. Step 2: In the first assembly state, assemble the two ends of the first spring (22) to the first spring shaft (46) and the second spring shaft (16) respectively; swing the rocker arm (45) in the direction of the jumper pivot end, and the rocker arm (45) drives the first spring (22) and the first crank (30) to rotate, so that the operating mechanism enters the second assembly state.

8. The method for assembling the operating mechanism of a circuit breaker according to claim 7, characterized in that, Before step one, the second spring shaft (16) is assembled on the first crank (30), the first crank (30) is pivotally mounted on the jumper (60) around the first axis (67m), and the jumper (60) is pivotally mounted on the bracket (50); the first spring shaft (46) is mounted on the rocker arm (45) of the rocker arm assembly, and the rocker arm (45) is pivotally mounted in the V-groove of the bracket (50).

9. The method for assembling the operating mechanism of a circuit breaker according to claim 7, characterized in that: The assembly method of the operating mechanism also includes step three: in the second assembly state, the reset structure (42) of the rocker arm assembly is assembled on the rocker arm (45), the positioning pin (17) is removed, and the first spring (22) drives the jump buckle (60) to rotate to cooperate with the reset structure (42).

10. The method for assembling the operating mechanism of a circuit breaker according to claim 9, characterized in that, The assembly method further includes the following steps: Step four, assembling the slider (26) on the slide rail (25), and rotating the two ends of the first connecting rod (27) on the second spring shaft (16) and the slider (26) respectively; Step five, pivotally setting the latch (13) on the bracket (50) through the latch shaft (12), and pivotally setting the re-latch (15) on the bracket (50) through the re-latch shaft (14); wherein, the order of steps four and five can be interchanged.

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