Fast tripping device and circuit breaker

Abstract

The present invention relates to the field of low-voltage electrical appliances, and specifically to a rapid tripping device, wherein a moving contact mechanism includes a contact support and a moving contact, an operating mechanism is connected to the moving contact mechanism by driving, so that the moving contact and the static contact are closed or disconnected; the rapid tripping device also includes a first push rod pivotally arranged on the contact support, the first push rod driven end of the first push rod is driven and engaged with the moving contact, and a driving gap is provided between the first push rod and the moving contact, and the first push rod driving end of the first push rod is driven and engaged with the operating mechanism to trip the contact; when the moving contact is electrically repelled by a short-circuit current, the moving contact rotates relative to the contact support, and after rotating through the driving gap, the moving contact contacts the first push rod driven end and drives the first push rod to rotate, so that the operating mechanism trips; the rapid tripping device of the present invention has a driving gap to prevent the rapid tripping device from malfunctioning. The present invention also relates to a circuit breaker including the rapid tripping device, wherein the rapid tripping device prevents malfunction of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and in particular to a fast tripping device and a circuit breaker comprising the fast tripping device. Background Art

[0002] As we all know, when a circuit breaker is normally energized, the electric repulsive force between its moving and static contacts is less than the final pressure of the contacts. When a short circuit occurs, the electric repulsive force between the moving and static contacts increases rapidly. When the electric repulsive force is greater than the final pressure of the contacts, the moving contact separates from the static contact, and the moving contact overcomes the contact pressure and moves away from the static contact. During this movement, the electric repulsive force gradually decreases, while the contact pressure gradually increases. At this time, if the operating mechanism of the circuit breaker does not actuate (trip), the repelled moving contact will fall back in a very short time, causing the circuit breaker to close again.

[0003] Chinese patent CN1366698A discloses a fast tripping device for a circuit breaker. The device comprises an L-shaped component, the middle of which is fixed to a rotating portion. One end of the L-shaped component is mounted on the opposite side of a contact arm via a pivot pin, and the other end is equipped with a trip pin that cooperates with a trip rod. When the contact arm is repelled by an electric repulsive force, the trip pin rotates as the contact arm rotates, pushing the trip rod and tripping the operating mechanism. A problem with this device is that at the moment the circuit breaker is closed, the contact arm typically exerts a large impact force on the fixed contact, causing the contact arm to rebound. The pivot pin is fixed to the contact arm, which drives the L-shaped component to rotate. If the contact arm rebounds sufficiently, the trip pin will push the trip rod, tripping the operating mechanism and causing the circuit breaker to malfunction.

[0004] U.S. Patent No. 5,103,198A discloses a circuit breaker having one or more sensors within the housing. When the moving contact is repelled by a repulsive force, the sensors sense changes in pressure within the housing and push a piston to trip the operating mechanism. This structure presents significant reliability issues. Specifically, the sensor requires a high-performance seal within the housing surrounding the contact, which is difficult to achieve with a perfect housing design. Furthermore, after a short circuit, the piston may become contaminated by arc particles, delaying its operation when the circuit breaker trips a second time. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide a fast tripping device to avoid malfunction of the fast tripping device; and also provide a circuit breaker including the fast tripping device, wherein the fast tripping device can avoid malfunction of the circuit breaker.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A fast tripping device includes an operating mechanism, a moving contact mechanism and a static contact, wherein the moving contact mechanism includes a contact support and a moving contact; the operating mechanism is connected to the moving contact mechanism to close or open the moving contact and the static contact;

[0008] The rapid tripping device also includes a first push rod pivotally arranged on the contact support, the first push rod including a first push rod driven end and a first push rod driving end, the first push rod driven end cooperates with the driving of the moving contact, and the first push rod driving end cooperates with the driving of the operating mechanism to cause it to trip; a driving gap is provided between the first push rod driven end and the moving contact; when the moving contact is electrically repelled by the short-circuit current, the moving contact rotates relative to the contact support, and after the moving contact rotates through the driving gap, it contacts the first push rod driven end, and the moving contact drives the first push rod to rotate, causing the operating mechanism to trip.

[0009] Preferably, the actuated end of the first push rod includes an actuated protrusion or an actuated groove.

[0010] Preferably, the moving contact includes a driving groove or a driving protrusion.

[0011] Preferably, the movable contact includes a movable conductive rod, the movable conductive rod includes a contact protrusion drivingly matched with the first push rod, and a driving gap is provided between the contact protrusion and the driven end of the first push rod.

[0012] Preferably, the rapid tripping device further comprises an intermediate transmission structure and a second push rod, the driving end of the first push rod is driven in cooperation with the second push rod through the intermediate transmission structure, and the second push rod is driven in cooperation with the operating mechanism to drive the operating mechanism to trip.

[0013] Preferably, the intermediate transmission structure includes a first intermediate push rod, a first intermediate shaft, a second intermediate push rod and a second intermediate shaft. The first intermediate push rod is driven and cooperated with the first push rod driving end. The first intermediate push rod and the second intermediate push rod are respectively fixedly connected to the first intermediate shaft, so that the first intermediate push rod, the first intermediate shaft and the second intermediate push rod rotate synchronously. The first intermediate shaft is set to rotate around its axis. One end of the second intermediate shaft is connected to the second intermediate push rod, and the other end is driven and cooperated with the second push rod.

[0014] Preferably, the first intermediate push rod includes a first intermediate push rod passive arm that cooperates with the driving of the first push rod, and a first intermediate push rod limiting arm; the fast tripping device includes a push rod limiting protrusion that cooperates with the first intermediate push rod limiting arm.

[0015] Preferably, the second push rod is a triangular plate structure, one of which is provided with a push rod driven hole for the second intermediate shaft to be inserted into and drive-coordinated with it, the second push rod is pivotally arranged by the second push rod shaft, and the third push rod driving finger is provided at the third top corner to cooperate with the re-locking drive.

[0016] Preferably, the re-lock includes a re-lock actuated column drivingly engaged with the second push rod.

[0017] Preferably, the operating mechanism includes a bracket, a rocker arm assembly, a lock, a trip lock and a re-lock pivotally arranged on the bracket, a first crank pivotally arranged on the trip lock around a first axis, a first spring, a slide rail, a slider and a first connecting rod; the rocker arm assembly includes a handle for synchronous action, a rocker arm fixedly connected to the handle and a reset structure for driving the trip lock and the lock to re-lock, and the rocker arm is pivotally arranged on the bracket; the first crank includes a crank limit part, and when the operating mechanism is in a closed state or a tripped state, the crank limit part cooperates with the trip lock limit; the slider is arranged on the slide rail and slides back and forth along its extension direction, one end of the first connecting rod and one end of the first spring are respectively connected to the first crank for rotation around the second axis, the other end of the first connecting rod is connected to the slider for rotation, and the other end of the first spring is connected to the rocker arm assembly for rotation; when the operating mechanism is in an open state or a tripped state, the slide rail and the slider limit cooperate to prevent it from sliding.

[0018] A circuit breaker includes the rapid tripping device described above; the circuit breaker also includes at least one breaking pole, each breaking pole including a unit housing and a moving contact mechanism disposed within the unit housing; a first intermediate shaft of the rapid tripping device is inserted into the unit housing, the inner and outer ends of the first intermediate shaft being drivingly connected to a first intermediate push rod and a second intermediate push rod, respectively; and a second push rod of the rapid tripping device is pivotally disposed outside the unit housing.

[0019] The fast tripping device of the present invention has a moving contact and a static contact, and when the moving contact and the static contact are normally closed or disconnected, the moving contact and the contact support rotate synchronously. Therefore, during the rotation of the moving contact mechanism, the driving gap between the moving end of the first push rod and the moving contact remains unchanged. When the moving contact and the static contact are normally closed, the moving contact will rebound. Due to the existence of the driving gap, a certain buffer space can be provided for the reasonable vibration generated when the moving contact and the static contact are closed, thereby avoiding the malfunction of the fast tripping device. When a short circuit fault occurs, the moving contact is quickly repelled by the electric repulsive force and driven by the first push rod, the intermediate transmission structure and the second push rod to re-lock and release the limit cooperation with the lock buckle, so that the lock buckle and the trip buckle are released, and the circuit breaker can be quickly opened.

[0020] The circuit breaker of the present invention comprises the fast tripping device, and the fast tripping device prevents the circuit breaker from malfunctioning during normal closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the principle of the operating mechanism of the present invention, and the operating mechanism is in the closed state;

[0022] Figure 2 This is a schematic diagram of the operating mechanism of the present invention, in which the operating mechanism is in the open state;

[0023] Figure 3 It is a schematic diagram of the principle of the operating mechanism of the present invention, and the operating mechanism is in a tripped state;

[0024] Figure 4 It is a structural diagram of the operating mechanism of the present invention, and the operating mechanism is in the closed state;

[0025] Figure 5 It is a structural diagram of the operating mechanism of the present invention, and the operating mechanism is in the open state;

[0026] Figure 6 It is a structural diagram of the operating mechanism of the present invention, and the operating mechanism is in a tripped state;

[0027] Figure 7 It is a schematic diagram of the principle of the circuit breaker of the present invention, and the circuit breaker is in the closed state;

[0028] Figure 8 It is a schematic diagram of the principle of the circuit breaker of the present invention, and the circuit breaker is in the open state;

[0029] Figure 9 It is a schematic diagram of the principle of the circuit breaker of the present invention, and the circuit breaker is in a tripped state;

[0030] Figure 10 This is a schematic diagram of the principle of the circuit breaker of the present invention. A moving contact is provided at each end of the moving contact, which cooperates with two static contacts respectively. The circuit breaker is in the closed state.

[0031] Figure 11 It is a structural schematic diagram of the circuit breaker of the present invention, and the circuit breaker is in the closed state;

[0032] Figure 12 It is a structural schematic diagram of the circuit breaker of the present invention, and the circuit breaker is in the open state;

[0033] Figure 13 It is a schematic structural diagram of the circuit breaker of the present invention, and the circuit breaker is in a tripped state;

[0034] Figure 14 It is a schematic structural diagram of the circuit breaker of the present invention, in which the moving contact is repelled by the electric repulsive force;

[0035] Figure 15 It is a structural diagram of the circuit breaker of the present invention, in which the contact spring rotates to the second dead point position;

[0036] Figure 16 It is a schematic structural diagram of the circuit breaker of the present invention, wherein the contact spring locks the moving contact;

[0037] Figure 17Schematic diagram of the structure of the operating mechanism of the present invention. The positioning pin fixes the jump buckle and the bracket together. The second spring shaft is limited in cooperation with the jump buckle. The first crank is limited in cooperation with the jump buckle. The distance between the second spring shaft and the first spring shaft is less than or equal to the length of the first spring.

[0038] Figure 18 It is a structural diagram of the operating mechanism of the present invention, and Figure 17 In comparison, the first spring is mounted on a first spring shaft and a second spring shaft;

[0039] Figure 19 is a schematic structural diagram of the operating mechanism of the present invention, showing at least the positional relationship between the first spring and the trip button;

[0040] Figure 20 It is a structural diagram of the operating mechanism of the present invention, and Figure 18 In contrast, the reset structure is mounted on the rocker arm;

[0041] Figure 21 It is a structural diagram of the operating mechanism of the present invention, and Figure 20 Compared with the previous one, the positioning pin is removed;

[0042] Figure 22 is a schematic projection diagram of the bracket of the present invention, showing at least the V-shaped groove;

[0043] Figure 23 Schematic diagram of the three-dimensional structure of the bracket of the present invention;

[0044] Figure 24 1 is a schematic projection diagram of the bracket of the present invention, showing at least the positional relationship and spacing between two jumper positioning arms;

[0045] Figure 25 It is a schematic diagram of the connection between the jump buckle and the first crank of the present invention;

[0046] Figure 26 It is a schematic diagram of the assembly structure of the bracket, the jump buckle and the jump buckle shaft of the present invention;

[0047] Figure 27 It is a structural schematic diagram of the rocker arm assembly of the present invention;

[0048] Figure 28 It is a structural schematic diagram of the rocker arm assembly of the present invention from another angle;

[0049] Figure 29 It is a structural schematic diagram of the moving contact assembly of the present invention;

[0050] Figure 30 1 is a schematic structural diagram of the movable contact assembly of the present invention, which at least shows the connection relationship between the movable conductive rod, the first clamping arm and the second clamping arm;

[0051] Figure 31It is a structural schematic diagram of an embodiment of the conductor of the present invention;

[0052] Figure 32 It is a structural schematic diagram of the fastener of the present invention;

[0053] Figure 33 1 is a schematic structural diagram of a first embodiment of a movable contact of the present invention;

[0054] Figure 34 It is a structural schematic diagram of another embodiment of the conductor of the present invention;

[0055] Figure 35 It is a structural schematic diagram of an embodiment of the movable contact mechanism of the present invention;

[0056] Figure 36 It is a schematic structural diagram of the contact support of the present invention;

[0057] Figure 37 It is a structural schematic diagram of the insulating member of the movable contact of the present invention;

[0058] Figure 38 It is a schematic diagram of the assembly structure of the movable contact mechanism, the static contact and the unit housing of the present invention;

[0059] Figure 39 Schematic diagram of the structure of the circuit breaker of the present invention, showing the assembly relationship between the moving contact mechanism, the first push rod and the second push rod;

[0060] Figure 40 Schematic diagram of the structure of the circuit breaker pole of the present invention, showing the matching relationship between the moving contact, the first push rod, the second push rod and the unit housing;

[0061] Figure 41 It is a schematic diagram of the assembly structure of the operating mechanism, rapid tripping device and circuit breaker of the present invention;

[0062] Figure 42 1 is a schematic diagram of the assembly structure of the first intermediate push rod and the first intermediate shaft of the present invention;

[0063] Figure 43 1 is a schematic structural diagram of the circuit breaker of the present invention, showing the assembly relationship between the operating mechanism and each circuit breaker pole;

[0064] Figure 44 It is a schematic structural 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;

[0065] Figure 45 It is a structural schematic diagram of another embodiment of the movable contact mechanism of the present invention;

[0066] Figure 46 1 is a schematic structural diagram of a second embodiment of the movable contact of the present invention;

[0067] Figure 47 It is a structural schematic diagram of the operating mechanism of the present invention, wherein one end of the first crank is pivotally arranged on the bracket. DETAILED DESCRIPTION

[0068] The following is combined with Figure 1 The embodiments given in FIG47 further illustrate the specific implementation of the circuit breaker of the present invention. The circuit breaker of the present invention is not limited to the description of the following embodiments.

[0069] As shown in Figures 7-16, 38-41 and 43, the circuit breaker of the present invention includes an operating mechanism 100 and at least one circuit breaker pole 300; the operating mechanism 100 includes at least one set of moving contact mechanisms, the moving contact mechanisms including a contact support 110 pivotally arranged around a third axis 111s and a moving contact 9 arranged on the contact support 110 and rotating synchronously therewith; each of the circuit breaker poles 300 includes a static contact 18, and the static contact 18 and the moving contact mechanism cooperate one-to-one to form a contact system, and each circuit breaker pole 300 is provided with at least one set of contact systems; the operating mechanism 100 is actuated to disconnect or close the moving contact 9 and the static contact 18, thereby realizing the closing or opening operation of the circuit breaker.

[0070] Preferably, the movable contact 9 rotates around the contact axis, and the contact axis coincides with the third axis 111s, or the contact axis is parallel to (but not coincident with) the third axis 111s. It should be pointed out 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, and the moving contact 9 is provided with a moving contact shaft hole 901 that cooperates with the moving contact shaft. In actual application, the aperture of the moving contact shaft hole 901 is slightly larger than the moving contact shaft to ensure the rotation activity of the moving contact 9; when the circuit breaker of the present invention is normally opened or normally closed under the drive of the operating mechanism 100, the moving contact 9 and the contact support 110 move synchronously, and at this time the rotation axes of the two coincide; when a short circuit fault occurs in the circuit breaker of the present invention, the moving contact 9 is repelled and rotated relative to the contact support 110, the inner surface of the moving contact shaft hole 901 and the moving contact shaft support the rotation of the moving contact 9 in a tangential manner, and at this time the rotation axis of the moving contact 9 is parallel to the third axis 111s.

[0071] Preferably, Figure 43 As shown, the circuit breaker of the present invention includes a plurality of circuit breaker poles 300 arranged side by side, and the movable contact mechanisms in each circuit breaker pole 300 are linked.

[0072] Preferably, Figure 7 As shown in FIG-9 , the movable contact 9 is a single-break contact, one end of the movable contact 9 is provided with a movable contact point, and the other end is driven and matched with the contact support 110; or Figure 10As shown, the movable contact 9 is a double-breakpoint contact, with movable contacts at both ends of the movable contact 9 and a middle portion drivingly engaged with the contact support 110. It should be noted that the movable contact 9 may also include more breakpoints.

[0073] like Figure 43 As shown, the following is an implementation of the housing of the circuit breaker of the present invention:

[0074] The circuit breaker of the present invention also includes a circuit breaker housing 3, in which the operating mechanism 100 and the circuit breaker poles 300 arranged side by side are respectively arranged; each of the circuit breaker poles 300 also includes a unit housing 120, and the contact system of each circuit breaker pole 300 is respectively arranged in the corresponding unit housing 120; the housing of the circuit breaker includes the circuit breaker housing 3 and the unit housing 120.

[0075] The following is another implementation of the housing of the circuit breaker of the present invention:

[0076] The circuit breaker of the present invention also includes a circuit breaker housing 3, and each of the circuit breaker poles 300 is arranged side by side and spaced apart in the circuit breaker housing 3. A phase separation partition is provided between adjacent circuit breaker poles 300 to ensure sufficient electrical clearance and creepage distance between each circuit breaker pole 300; the housing of the circuit breaker includes the circuit breaker housing 3 and the phase separation partition.

[0077] The circuit breaker of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0078] like Figure 1 -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 circuit breaker poles 300; the operating mechanism 100 includes a moving contact mechanism, the moving contact mechanism includes a contact support 110 pivotally arranged around a third axis 111s and a moving contact 9 arranged on the contact support 110 and rotating synchronously therewith; each of the circuit breaker poles 300 includes a static contact 18, and the static contact 18 and the moving contact mechanism are matched one-to-one to form a contact system, and each circuit breaker pole 300 is provided with at least one set of contact systems; the operating mechanism 100 is actuated to disconnect or close the moving contact 9 and the static contact 18, thereby realizing the opening or closing operation of the circuit breaker.

[0079] Specifically, such as Figure 43 and 44 As shown, the circuit breaker of this embodiment is a three-phase circuit breaker, comprising three circuit breaker poles 300 arranged side by side (used to connect or disconnect the three-phase power circuit respectively), the operating mechanism 100 is mounted on the circuit breaker pole 300 located in the middle, and the moving contact mechanisms of the three circuit breaker poles 300 are linked (as shown in FIG. Figure 3As shown, the movable contact mechanisms of the three breaking poles 300 are preferably linked via a linkage shaft 5. Of course, the number of the breaking poles 300 can be adjusted according to actual needs. For example, the number of the breaking poles 300 can be two to match a two-phase power supply; or the number of the breaking poles 300 can be four to match a three-phase four-wire circuit; or the number of the breaking pole 300 can be one to match a single-phase circuit.

[0080] like Figure 43 As shown, the following is a first embodiment of the housing of the circuit breaker of this embodiment:

[0081] The circuit breaker of this embodiment also includes a circuit breaker housing 3, in which the operating mechanism 100 and the circuit breaking poles 300 arranged side by side are respectively arranged; each of the circuit breaking poles 300 also includes a unit housing 120, and the contact system of each circuit breaking pole 300 is respectively arranged in the corresponding unit housing 120, and the contact support 110 is pivotally arranged on the unit housing 120; the housing of the circuit breaker includes the circuit breaker housing 3 and the unit housing 120.

[0082] Preferably, Figure 38 As shown, the contact support 110 includes support shaft grooves 111 respectively provided on both sides thereof, and the unit housing 120 includes a housing shaft column 120-2 matched with the support shaft grooves 111. Figure 38 and 41 As shown, the unit housing 120 includes two half-shells that are matched with each other, and two housing shaft columns 120-2 are respectively arranged on the inner walls of the two half-shells.

[0083] The circuit breaker of this embodiment can also achieve the following technical effects: the operating mechanism 100 (except the moving contact mechanism) is entirely arranged outside the unit housing 120, and the contact system is arranged inside the unit housing 120. Firstly, it prevents arc particles generated by the closing / breaking of the moving and static contacts from being deposited on the operating mechanism 100 and affecting 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 facilitates the modular assembly of the operating mechanism 100.

[0084] The following is a second embodiment of the housing of the circuit breaker of this embodiment:

[0085] The circuit breaker of this embodiment further includes a circuit breaker housing 3 , in which the circuit breaker poles 300 are arranged side by side and spaced apart, with phase separation partitions provided between adjacent circuit breaker poles 300 ; the housing of the circuit breaker includes the circuit breaker housing 3 and the phase separation partitions.

[0086] like Figure 7FIG13 shows a first embodiment of the operating mechanism 100, which is provided with a double-slider mechanism. This can reduce the correlation between the operating mechanism and the rotation angle of the contact system, thereby increasing the opening distance of the moving contacts without increasing the space requirement of the operating mechanism. The details are as follows:

[0087] like Figure 7 As shown in Figure 13, the operating mechanism 100 includes a bracket 50, a rocker assembly and a trip latch 60 pivotally arranged on the bracket 50, as well as 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 arranged on the trip latch 60 around the 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 assembly, and the other end is connected to the rotation 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 arranged on the bracket 50 or the housing of the circuit breaker, and the slider 26 is slidably arranged on the slide rail 25 and is 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 the third axis 111s. The operating mechanism 100, its first crank 30, first connecting rod 27, slide rail 25 and slider 26 form a first slider mechanism, the contact support 110, second connecting rod 29, slide rail 25 and slider 26 form a second slider mechanism, the first slider mechanism and the second slider mechanism cooperate to reduce the correlation between the tripping latch 60, the first connecting rod 27 and the rotation angle of the contact support 110, thereby increasing the opening distance of the moving contact without increasing the space requirement of the operating mechanism, and ensuring the reliable operation performance of the operating mechanism.

[0088] Preferably, the slide rail 25 is a groove-like structure or a hole-like structure. Further, when the slide rail 25 is a groove-like structure, it can be set on the inner side wall of the bracket 50 or the inner side wall of the unit shell 120 (when the circuit breaker pole 300 is not provided with a unit shell 120, a phase separation partition is provided between adjacent circuit breaker poles 300, and the slide rail 25 is provided on the side wall of the phase separation partition), and the slide rail 25 does not penetrate the bracket 50 or the unit shell 120 (or the phase separation partition) in the thickness or depth direction. Further, the two ends of the slide rail 26 are respectively provided in 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 provided in the space between the two slide rails 25. When the slide rail 25 is a hole-like structure, it can be provided on the inner side wall of the bracket 50 (such as Figure 4-6) or on the inner side 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 breaker poles 300, and the slide rail 25 is provided on the side wall of the phase separation partition), and the slide rail 25 passes through the bracket 50 or the unit housing 120 (or the phase separation partition) in the thickness or depth direction. Figure 16 、 22 As shown, both ends of the slider 26 pass through the two slide rails 25 respectively, one end of the first connecting rod 27 connected to the slider 26 is located between the two slide rails 25, and one end of the two second connecting rods 29 connected to the slider 26 is located on both sides of the two slide rails 25, and is rotatably connected to both ends of the slider 26 respectively.

[0089] 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 adaptively set according to the current level of the circuit breaker, design space, and control requirements. Figure 11 、 12 As shown in Figure 13, when the circuit breaker is opened or tripped, the slider 26 moves upward along the slide rail 25, and when the circuit breaker is closed, the slider 26 moves downward along the slide rail 25. The upward movement trajectory and the downward movement trajectory are overlapping. In this case, it can be set to a straight shape, an arc shape, or a combination of a straight shape and an arc shape. The slide rail 25 can also be set to other shapes such as a triangle: for example, the slide rail 25 is set to a triangle. When the circuit breaker is opened or tripped, the slider 26 moves upward along one side of the triangle of the movement trajectory of the slide rail 25. When the circuit breaker is closed, the slider 26 moves downward along the other side of the triangle of the movement trajectory of the slide rail 25. The downward and upward movement trajectories do not overlap (not shown in the figure); when the state of the operating mechanism is switched, the slider 26 forms a closed movement trajectory along the slide rail 25.

[0090] like Figure 11 -13, 23, 46, is an embodiment of the slide rail 25 and the slider 26: the bracket 50 includes two bracket arms 501 arranged relatively spaced apart, each bracket arm 501 is provided with a slide rail 25, and the two ends of the slider 26 are respectively slidably arranged on the two slide rails 25. Figure 7 As shown in Figures 13, 23 and 46, the slide rail 25 is a slide hole, and the slider 26 is a sliding shaft with two ends respectively set in the two slide holes. 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 arranged in the straight hole. Both ends of the sliding shaft are provided with sliding shaft grooves that are limited and matched with the side walls of the straight hole.

[0091] Preferably, refer to Figure 11As shown, the other end of the second connecting rod 29 is directly connected to the contact support 110 through the first connecting shaft 21. Figure 47 As shown, the bracket 50 includes a second avoidance hole 509 for the first connecting shaft 21 to pass through and to avoid the first connecting shaft 21. Figure 47 As shown, the second avoidance hole 509 is an arc-shaped hole that matches the moving trajectory of the first connecting shaft 21.

[0092] Preferably, Figure 41 As shown, the operating mechanism 100 includes a plurality of contact supports 110 arranged side by side and spaced apart. Each contact support 110 is linked by a linkage shaft 5. The housing of the circuit breaker is provided with a first avoidance hole 120-7 for the linkage shaft 5 to pass through and avoid the linkage shaft 5. Figure 41 As shown, the first avoidance hole 120-7 is an arc-shaped hole, which matches the moving trajectory of the linkage shaft 5. Figure 41 As shown, when the housing of the circuit breaker includes a unit housing 120, the first avoidance hole 120-7 is provided on the unit housing 120; or, when the housing of the circuit breaker is provided with a phase separation partition, the first avoidance hole is provided on the phase separation partition.

[0093] Preferably, Figure 1 As shown in FIG13, the operating mechanism 100 further includes a lock buckle 13 and a re-lock buckle 15 pivotally mounted on the bracket 50, the jump buckle 60 and the lock buckle 13 are locked together, and the lock buckle 13 and the re-lock buckle 15 are limitedly engaged. Figure 1 As shown in Figures 6 and 25, one end of the jump buckle 60 is provided with a jump buckle fastening surface 604, and the lock buckle 13 is provided with a lock buckle fastening surface. The jump buckle fastening surface 604 is located below the lock buckle fastening surface and cooperates with its limiting position to realize the lock fit between the jump buckle 60 and the lock buckle 13; Figure 1 As shown in FIG. 6 , one end of the re-clip 15 is located on one side of the lock 13 and is in limited engagement with the lock. When the re-clip 15 is driven to rotate, the re-clip 15 and the lock 13 are released from limited engagement, and the lock 13 rotates and releases the limited engagement between the jumper latch surface 604 and the lock latch surface, so that the lock 13 and the jumper latch 60 are released from locked engagement. 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 will drive the re-clip 15 to rotate, so that the re-clip 15 and the lock 13 are released from limited engagement. 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 release, and the overload protection mechanism is preferably a thermal release mechanism (for example, the overload protection mechanism includes a bimetallic strip). It should be pointed out that the cooperation between the lock buckle 13 and the jump buckle 60, the cooperation between the lock buckle 13 and the re-buckle 15, and the cooperation between the re-buckle 15 and the short-circuit and overload protection mechanism can all be achieved through existing technologies and will not be elaborated in detail here.

[0094] Preferably, Figure 1 As shown in FIG13, 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 and re-engage the lock catch 13. The rocker arm 45 is pivotally mounted on the bracket 50, and the rocker arm 45 is respectively limited and matched with the bracket 50 at both ends of the rocker arm assembly's swing stroke. Figure 4 As shown in Figures 1-6 and 11-16, the reset structure 42 is a reset shaft, and the jump buckle 60 is a strip structure, one end of which is locked with the lock buckle 13, and the other end is pivotally arranged on the bracket 50. The jump buckle 60 includes a driving side edge 603 arranged at one edge thereof for driving and cooperating with the reset structure 42. Specifically, as shown in Figures 1-6 and 11-16, the jump buckle 60 is a strip structure, one end of which is locked with the lock buckle 13, and the other end is pivotally arranged on the bracket 50. Figure 4 In the directions shown in FIG-6 and FIG11-16, the driving side edge 603 is arranged at the upper edge of the jump buckle 60.

[0095] Preferably, Figure 1 As shown in FIG13 , the first crank 30 includes a crank limiter 31. When the circuit breaker is in a closed state or a tripped state, the crank limiter 31 cooperates with the tripper 60 to limit the position. Figure 4 As shown in Figures 1-6 and 11-16, the crank limiter 31 is a limiter shaft, and the crank limiter 31 cooperates with the jumper 60 to prevent the first crank 30 from rotating. Figure 4 As shown in Figures 1-6 and 11-16, the jump buckle 60 includes a limiting side edge 608 provided at one side edge thereof to cooperate with the crank limiting portion 31. The limiting side edge 608 is an arc-shaped side edge. Figure 4 As shown in Figures 11-6 and 11-16, the limiting side edge 608 is set at the lower edge of the jump buckle 60.

[0096] Preferably, Figure 1 As shown in FIG13 , the first connecting rod 27 and the first crank 30 are connected to each other in rotation around the second axis 16m; one end of the first spring 22 is connected to the second axis 16m in rotation, and the other end is arranged on the rocker assembly in rotation around the fourth axis 46m. Figure 1 As shown in FIG. 13 , the first crank 30 and the first connecting rod 27 are rotationally connected via 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 via the first spring shaft 46 .

[0097] Preferably, Figure 1As shown in FIG-3 , the jump buckle 60 is pivotally mounted on the bracket 50 around the fifth axis 11s, the re-buckle 15 is pivotally mounted on the bracket 50 around the sixth axis 14s, the lock buckle 13 is pivotally mounted on the bracket 50 around the seventh axis 12s, the rocker arm 45 is pivotally mounted on the bracket 50 around the eighth axis 28s, and one end of the first spring 22 is pivotally mounted on the rocker arm 45 around the fourth axis 46. Further, as Figure 4 As shown in FIG-6, the jump buckle 60 is pivotally arranged on the bracket 50 through the jump buckle shaft 11, the re-buckle 15 is pivotally arranged on the bracket 50 through the re-buckle shaft 14, the lock buckle 13 is pivotally arranged on the bracket 50 through the lock buckle shaft 12, the rocker arm 45 is pivotally arranged on the bracket 50 through the rocker arm shaft 28, the two ends of the first spring 22 are respectively connected to the rocker arm 45 and the first crank 30 through the first spring shaft 46 and the second spring shaft 16, 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 arranged on the jump buckle 60 through the first crank shaft 67, one end of the first connecting rod 27 is connected to the first crank 30 through the second spring shaft 16, and the other end is connected to the slider 26. Further, as shown in FIG-6, Figure 22 As shown, the bracket arm 501 of the bracket 50 is provided with a bracket-jumping buckle shaft hole 511, a bracket-re-buckle shaft hole 514, a bracket-locking shaft hole 512, and a bracket-rocker shaft groove 528, which respectively cooperate with the jumping buckle shaft 11, the re-buckle shaft 14, the locking buckle shaft 12, and the rocker shaft 28; Figure 25 As shown, the jump buckle 60 includes a jump buckle shaft hole 601 set at one end thereof, the first crank 307 is provided with a crank shaft hole 307 cooperating with the first crank shaft 67, and the middle part of the jump buckle 60 is provided with a jump buckle-crank shaft hole cooperating with the first crank shaft 67.

[0098] Preferably, Figure 4 -6, 11-16, 25 show an embodiment of the first crank 30: the first crank 30 is a triangular structure, one vertex is pivotally mounted on the jump buckle 60 around the first axis 67m, another vertex is rotatably connected to the first spring 22 and the first connecting rod 27 around the second axis 16m, and the third vertex is provided with a crank limiter 31. Figure 26 As shown, the two first cranks 30 are respectively arranged on both sides of the jump buckle 60, and the three vertices of the two first cranks 30 are respectively connected through the first crank shaft 67, the second spring shaft 16 and the crank limiter 31. 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 , which respectively cooperate with the first crank shaft 67 , the crank limiting portion 31 , and the second spring shaft 16 , and the three are respectively located at the three vertex corners of the first crank 30 .

[0099] Preferably, Figure 4As shown in Figures 1-6 and 11-16, the bracket 50 includes a V-shaped groove 505, and the rocker arm 45 is respectively limited and matched with the two side walls of the V-shaped groove 505 at the first end and the second end of the stroke. Figure 22 and 23 As shown, the bracket 50 includes bracket arms 501 and bracket connecting plates 502 that are relatively spaced apart. The two ends of the bracket connecting plates 502 are respectively bent and connected to the two bracket arms 501, so that the bracket 50 is a U-shaped structure as a whole. Each bracket arm 501 is provided with a V-shaped groove 505. Figure 27 and 28 As shown, the rocker arm 45 includes a pair of relatively spaced rocker arm legs 408 , which are respectively disposed in two V-shaped grooves 501 and are rotatably connected to the two support arms 501 .

[0100] Specifically, such as Figure 4 -6, 11-16, the lower end of the rocker arm support leg 408 is pivotally arranged at the bottom of the V-shaped groove 505 through the rocker arm shaft 28, and the rocker arm 45 is at the first end of the stroke and the second end of the stroke, and the rocker arm support leg 408 is respectively limited and matched with the right side wall and the left side wall of the V-shaped groove. Figure 22 As shown, the bottom of the V-shaped groove 505 is provided with a bracket-rocker shaft groove 528 that cooperates with the rocker shaft 28; Figure 27 As shown, one end of the rocker arm support foot 408 is provided with a rocker arm shaft groove 428 that cooperates with the rocker arm shaft 28 and cooperates with the bracket-rocker arm shaft groove 528.

[0101] The following is a process of switching the operating mechanism 100 of the first embodiment between the open state, the closed state and the tripped state, specifically as follows:

[0102] like Figure 7 As shown in FIG13 , 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; the two ends of the first spring 22 are the first end 220 and the second end 221 of the spring, which are respectively connected to the rocker arm assembly and the first crank 30. Specifically, Figure 7 As shown in FIG. 13 , the first end and the second end of the travel of the rocker arm 45 are respectively the right end and the left end of the swing travel of the rocker arm 45 , the upper end of the first spring 22 is the spring first end 220 , and the lower end is the spring second end 221 .

[0103] The following will be combined Figure 7 、 8 , 11, and 12, the operation process of the operating mechanism 100 switching from the closing state to the opening state is described as follows: Figure 7 and 11As shown, when the operating mechanism 100 is in the closed state, the rocker arm 45 swings toward the second end of the stroke and drives the first end 220 of the spring to rotate around the second end 221 of the spring, until the first spring 22 rotates past 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 the stroke, the first crank 30 drives the slider 26 to slide along the slide rail 25 through the first connecting rod 27, and the slider 26 drives the contact support 110 to rotate in the first direction to the disconnecting position through the second connecting rod 29, so that the operating mechanism is switched to the disconnecting position. Figure 8 and 12 The opening state is shown in the figure. Figure 7 、 8 As shown in Figures 11 and 12, when the operating mechanism 100 switches from the closing position to the opening position, the slider 26 moves upward along the slide rail 25, the first direction is counterclockwise, and the second direction is clockwise; when the first spring 22 is at the first dead point, the energy storage of the first spring 22 reaches the maximum value, the first axis 67m is located on the first axis, and when the first spring 22 rotates around the second end 221 of the spring past the first dead point, the first axis 22 rotates past the first axis 67m. Therefore, the first axis 67m can also be regarded as the first dead point, that is, the first axis 22 rotates past the first axis 67m, which means that the first spring 22 rotates past the first dead point. It should be pointed out that, as 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 continue to 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.

[0104] The following will be combined Figure 7 、 8 , 11, and 12, the operation process of the operating mechanism 100 switching from the open state to the closed state is described as follows: Figure 8 and 12 As shown, when the operating mechanism 100 is in the open state, the rocker arm 45 swings toward the first end of the stroke and drives the first end 220 of the spring to rotate around the second end 221 of the spring, until the first spring 22 rotates past the first dead point position, the first spring 22 drives the first crank 30 to rotate in the first direction so that the crank limiter 31 cooperates with the jumper 60 to prevent 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 the 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 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. Figure 7 As shown, when the operating mechanism 100 is in the closed state, the moving contact 9 and the static 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.

[0105] The following combination Figure 7 、 9 , 11, and 13, the operation process of the operating mechanism 100 switching from the closing state to the tripping state is described as follows: Figure 7 and 11 As shown, when the operating mechanism 100 is in the closed state, the re-button 15 rotates to release the limit cooperation with the lock buckle 13, and the lock buckle 13 rotates to release the lock cooperation with the trip buckle 60. The trip buckle 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 disconnecting 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 is limited and cooperates with the trip buckle 60. The operating mechanism switches to the state shown in FIG. Figure 9 and 13 The tripping state is shown in the figure. Figure 7 、 9 As shown in Figures 11 and 13, when the operating mechanism 100 switches from the closing state to the tripping state, the slider 26 moves upward along the slide rail 25. Figure 13 As shown, when the operating mechanism 100 is in the tripped 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 continue to 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.

[0106] The following will be combined Figure 8 、 9 , 11, and 13, the operation process of the operating mechanism 100 switching from the tripping state to the opening state is described as follows: Figure 9 and 13 As shown, when the operating mechanism 100 is in the tripped state, the rocker arm 45 swings to the second end of the stroke, and the rocker arm 45 drives the trip buckle 60 to rotate to engage with the lock buckle 13 through the reset structure 42. At the same time, the lock buckle 13 rotates to engage with the re-lock 15, and the operating mechanism switches to Figure 8 and 11 The breaker status is shown.

[0107] The following is a second embodiment of the operating mechanism 100, specifically:

[0108] The operating mechanism 100 of the second embodiment differs from the operating mechanism 100 of the first embodiment in that the operating mechanism 100 of the second embodiment further includes an auxiliary limiting structure, one end of which is rotatably connected to the second connecting rod 29, and the other end of which is rotatably connected to the bracket 50 or the circuit breaker housing. The auxiliary limiting structure coordinates with the movement of the slider 26 to influence the motion state of the second connecting rod 29, thereby jointly defining the motion trajectory of the rotational connection between the second connecting rod 29 and the contact support 100.

[0109] It should be noted that the auxiliary limiting structure can be rotatably connected to one end of the bracket 50 or the circuit breaker housing, and can also be configured to reciprocate along a predetermined trajectory, for example, by sliding the end on a track. Furthermore, when one end of the auxiliary limiting structure is connected to the circuit breaker housing, the end can be connected to the circuit breaker housing 3 or the unit housing 120 (or the phase separation partition).

[0110] Preferably, the auxiliary limiting structure is a connecting rod structure or a crank slider structure. Furthermore, the auxiliary limiting structure is a third crank, one end of which is rotationally connected to the second connecting rod 29 and the other end is rotationally 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 third crank rotates around its portion pivotally mounted on the bracket 50 or the circuit breaker housing, thereby assisting in limiting the movement of the second connecting rod 29. The synergistic action of the second connecting rod 29 and the third crank makes the movement of the second connecting rod 29 more precise.

[0111] Preferably, the third crank is a straight or arc-shaped plate structure.

[0112] like Figure 7 13 and 47 show a third embodiment of the operating mechanism 100, which is specifically as follows:

[0113] The operating mechanism 100 of the third embodiment differs from the operating mechanism 100 of the first embodiment in that the operating mechanism 100 further includes a second crank 19, which includes a second crank support, a second crank connection, and a second crank drive. The second crank 19 is pivotally mounted via the second crank support and is connected to the contact support 110 via the second crank drive. A second connecting rod 29 is rotationally connected to the slider 26 at one end and to the second crank connection at the other end, driving the contact support 110 to rotate about 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 assembly can drive the first crank 30 to swing through the first spring 22, the first crank 30 drives the slider 26 to slide on the slide rail 25 through the first connecting rod 27, the slider 26 drives the second crank 19 to swing through the second connecting rod 29, the second crank 19 drives the contact support 110 to rotate, and the contact support 110 drives the movable 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 through the second connecting rod 29. Due to the rotation axis of the rotation connection between the second connecting rod 29 and the second crank 19 (reference Figure 11 -14) and the distance between 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 produce a small rotation, which will be proportionally amplified to the opening distance between the moving contact and the static 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.

[0114] Specifically, when the second crank support portion of the second crank 19 is disposed on the housing of the circuit breaker, the second crank support portion can be pivotally disposed on the circuit breaker housing 3 or the unit housing 120 (or the phase separation partition). Figure 41 As shown, the second crank support portion is pivotally mounted on the unit housing 120 via the second crank shaft 79. Further, the unit housing 120 includes a second crank shaft hole, which is a blind hole, and the second crank shaft 79 is matched with the second crank shaft hole.

[0115] Specifically, such as Figure 47 As shown, when the second crank support portion of the second crank 19 is set on the bracket 50, the second crank support portion is pivotally set on the side wall of the bracket 50 through the second crank 79, and the second crank shaft 79 can be a common connecting part such as a rivet, a screw or a screw. The second crank support portion is pivotally set on the bracket 50, which is beneficial to further reduce the assembly error of the operating mechanism 100 and improve the operation reliability of the operating mechanism 100.

[0116] Preferably, Figure 11As shown in FIG16, 41 and 47, the second crank connecting portion of the second crank 19 is provided between the second crank supporting portion and the second crank driving portion. Figure 11 As shown in FIG. 13 , the second crank support portion and the second crank driving portion are respectively arranged at both ends of the second crank 19 , and the second crank support portion is arranged in the middle of the second crank 19 and is located between the second crank support portion and the second crank driving portion.

[0117] Preferably, the rotation center of the second crank 19 is the ninth axis, which is parallel to or coincides with the third axis 111s. Figure 41 As shown, when the second crank support portion is pivotally disposed on the unit housing 120, the ninth axis coincides with the third axis 111s; Figure 47 As shown, when the second crank support portion is pivotally disposed on the bracket 50 , the ninth axis is parallel to the third axis 111 s and the two do not overlap.

[0118] Preferably, Figure 11 As shown in Figures 16 and 41, the second connecting rod 29 is rotationally connected to the second crank connecting portion of the second crank 19 through the first connecting shaft 21.

[0119] Preferably, Figure 11 As shown in Figures 16 and 41, the second crank driving portion of the second crank 19 is drivingly 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 the contact supports 110. The second crank driving portion of the second crank 19 is connected to the linkage shaft 5 to drive the contact supports 110 to rotate, which is beneficial for improving the synchronization of the operation of each circuit breaker 300.

[0120] Preferably, the second connecting rod 29 is an arc-shaped or straight plate structure, one end of which is rotatably connected to the slider 26, and the other end is 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). Figure 11 As shown in FIG. 16 , 41 , and 47 , the second connecting rod 29 is a curved plate structure, one end of which is rotatably connected to the slider 26, and the other end of which is rotatably connected to the second crank connecting portion of the second crank 19. It should be noted that the shape of the second connecting rod 29 can be adapted to the specific spatial conditions. When it is necessary to avoid a specific structure, it can be designed into a shape that meets the requirements. While curved or straight plate shapes are relatively common designs, the shape of the second connecting rod 29 is not limited to curved or straight plate structures.

[0121] like Figure 1 FIG13 shows a fourth embodiment of the operating mechanism 100, which is specifically as follows:

[0122] The operating mechanism 100 of the fourth embodiment is different from the operating mechanisms 100 of the first to third embodiments in that: Figure 2 As shown in Figures 1-3, 5-6, 8-9, and 12-13, the slide rail 25 is defined and mounted on the bracket 50. When the operating mechanism 100 is in the open or tripped state, the slider 26 engages with the slide rail 25 to prevent the slider 26 from sliding. The slide rail 25 not only provides a guide for the slider 26 but 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 maintain stable closed, open, and tripped positions without interfacing with the contact support 110. This makes the operating mechanism 100 an independently operable mechanism, 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 interface with the contact system, avoiding contact system wear during testing, improving assembly efficiency, and reducing R&D and production costs. Furthermore, the operating mechanism 100 of the fourth embodiment can be independently switched among the three states or positions of closing, opening and tripping when the second connecting rod 29, the contact support 110 and the moving contact 9 are removed.

[0123] like Figure 4 -6, 11-16 show a layout of the operating mechanism 100 of the fourth embodiment: the re-lock 15, lock 13, jump lock 16, and first crank 30 are all arranged between the two bracket arms 501; one end of the jump lock 60 is pivotally arranged on the bracket connecting plate 502, and the other end is locked with the lock 13; the re-lock 15 and lock 13 are arranged on one side of the V-shaped groove 501, and the bracket connecting plate 502 is located on the other side of the V-shaped groove 501; one end of the rocker arm foot 408 is pivotally arranged at the bottom of the V-shaped groove 501; one end of the first crank 30 is rotationally connected to the middle of the jump lock 60, and the other end is rotationally connected to one end of the first connecting rod 27, and the other end of the first connecting rod 27 is drive-connected to the slider 26; the slide rail 25 is arranged on the bracket arm 501, and is respectively arranged at both ends of the bracket arm 501 with the V-shaped groove 501 and the opening directions are opposite. Further, as Figure 7 As shown in FIG. 16 , the slider 26 is also connected to one end of the second connecting rod 29 , 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 arranged around the ninth axis, the ninth axis coincides with the third axis 111s, and the other end is connected to the contact support 110 .

[0124] Specifically, such as Figure 4-6, 11-16, the right end of the jump buckle 60 is pivotally set on the bracket connecting plate 502, and the left end is locked with the lock buckle 13; the re-buckle 15 and the lock buckle 13 are set on the left side of the V-shaped groove 501, and the bracket connecting plate 502 is located on the right side of the V-shaped groove 501; the lower end of the rocker arm support foot 408 is pivotally set at the bottom of the V-shaped groove 501; the upper end of the first crank 30 is connected to the middle part of the jump buckle 60 for rotation, and the lower end is connected to the upper end of the first connecting rod 27 for rotation, and the lower end of the first connecting rod 27 is connected to the slider 26 for driving; the slide rail 25 and the V-shaped groove 501 are respectively set at the lower end and upper end of the bracket arm 501, and the openings of the two are facing the lower side and the upper side respectively. Further, as Figure 7 -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 pivotally arranged around the third axis 111s respectively, and the lower end of the second crank 19 is drivingly connected to the contact support 110.

[0125] To better illustrate the structure and principle of the operating mechanism 100, the following describes in detail the coordination relationship between the components of the operating mechanism 100 of the fourth embodiment in three states (closed, open, and tripped), as follows:

[0126] like Figure 1 As shown in FIG-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 of the spring and the second end 221 of the spring, which are respectively connected to the rocker arm assembly and the first crank 30; 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; 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 the stroke, the re-lock 15 is limitedly engaged with the lock catch 13, the lock catch 13 is locked with the jump catch 60, the crank limit portion 31 is limitedly engaged with the jump catch 60 to prevent the first crank 30 from rotating in the first direction, and the first axis 67m is located on the first side of the axis; 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 the stroke, the re-lock 15 is limited in engagement with the lock catch 13, the lock catch 13 is locked in engagement with the jump catch 60, the crank limiter 31 is released from the limit engagement with the jump catch 60, the reset structure 42 is limited in engagement with the jump catch 60, the slider 26 is limited in engagement with the slide rail 25 and the first connecting rod 27 prevents the first crank 30 from rotating in the second direction, the first direction and the second direction 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 tripped state, the rocker arm 45 is located in the middle of its swing stroke, the re-lock 15 and the lock buckle 13 are released from the limit fit, the lock buckle 13 and the trip buckle 60 are released from the lock fit, the crank limit portion 31 is limited in the position fit with the trip buckle 60, the reset structure 42 is limited in the position fit with the trip buckle 60, the slider 26 is limited in the position fit with the slide rail 25, and the first axis 67m is located on the first side of the axis; the operating mechanism 100 enters the opening state after being re-locked from the tripped state.

[0127] Specifically, such as Figure 1 -6, the first end of the stroke is the right end of the swing stroke of the rocker arm assembly or the rocker arm 45, and the second end of the stroke is the left end of the swing stroke of the rocker arm assembly or the 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.

[0128] It should be pointed out that the “re-buckle” of the operating mechanism 100 means that the lock buckle 13 and the jump buckle 60 resume the lock fit and the re-buckle 15 and the lock buckle 13 resume the limit fit.

[0129] The following is the operation process of the operating mechanism 100 of the fourth embodiment switching between the closed state, the open state and the tripped state:

[0130] The following will be combined Figure 1 、 4 , 2 and 5, the operation process of the operating mechanism 100 switching from the closing state to the opening state is described as follows: Figure 1 and 4 As shown, when the operating mechanism 100 is in the closed state, the rocker arm 45 swings toward the second end of the stroke and drives the first end 220 of the spring to rotate around the second end 221 of the spring, until the first spring 22 rotates past 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 the 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, and the operating mechanism 100 switches to Figure 2 and 5 The opening state is shown in the figure. Figure 1 and 4In the direction shown, 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, until 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 cooperates with its limit, preventing the first crank 30 from rotating in the clockwise direction (second direction), and the operating mechanism 100 switches to Figure 2 and 5 The breaker status is shown.

[0131] The following will be combined Figure 1 、 4 , 2 and 5, the operation process of the operating mechanism 100 switching from the open state to the closed state is described: Figure 2 and 5 As shown, when the operating mechanism 100 is in the open state, the rocker arm 45 swings toward the first end of the stroke and drives the first end 220 of the spring to rotate around the second end 221 of the spring, until the first spring 22 rotates past the first dead point position, the first spring 22 drives the first crank 30 to rotate in the first direction so that the crank limit portion 31 and the jump buckle 60 limit and cooperate to prevent the first crank 30 from rotating in the first direction, and at the same time drives the rocker arm 45 to swing to the first end of the stroke, and the operating mechanism 100 switches to Figure 1 and 4 The first direction and the second direction are opposite to each other. Figure 2 and 5 In the direction shown, the operating mechanism 100 is in the off 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, until the first spring 22 rotates through 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 limit portion 31 cooperates with the jump buckle 60 to prevent the first crank 30 from continuing to rotate counterclockwise (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 Figure 1 and 4 The closing state is shown.

[0132] The following will be combined Figure 1 、 4 , 3 and 6, the operation process of the operating mechanism 100 switching from the closed state to the tripped state is described: Figure 1 and 4As shown, when the operating mechanism 100 is in the closed state, the re-button 15 rotates to release the limit cooperation with the lock buckle 13, and the lock buckle 13 rotates to release the lock cooperation with the trip buckle 60. The trip buckle 60 rotates and drives the first crank 30 to rotate synchronously. The first crank 30 drives the slider 26 to move to the limit cooperation with the slide rail 25 through the first connecting rod 27 to prevent the trip buckle 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 is limited to cooperate with the trip buckle 60, and the operating mechanism 100 switches to Figure 3 and 6 The tripping state is shown in the figure. Figure 1 and 4 In the direction shown, when the operating mechanism 100 is in the closed state, the buckle 15 rotates counterclockwise to release the limit cooperation with the lock buckle 13, and the lock buckle 13 rotates counterclockwise to release the lock cooperation with the jump buckle 60. The jump buckle 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 to cooperate with its limit, preventing the jump buckle 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 cooperates with the limit of the jump buckle 60, and the operating mechanism 100 switches to Figure 3 and 6 The trip status shown.

[0133] The following will be combined Figure 3 、 6 , 2 and 5, the operation process of the operating mechanism 100 switching from the tripping state to the opening state is described: Figure 3 and 6 As shown, when the operating mechanism 100 is in the tripped state, the rocker arm 45 swings to the first end of the stroke, and the reset structure 42 drives the trip buckle 60 to rotate to lock with the lock buckle 13, so that the lock buckle 13 and the re-lock 15 are limited and matched, and the operating mechanism 100 switches to Figure 2 and 5 The opening state is shown in the figure. Figure 3 and 6 In the direction shown, when the operating mechanism 100 is in the tripped state, the rocker arm 45 swings counterclockwise to the first end of the stroke, and drives the jump buckle 60 to rotate counterclockwise through the reset structure 42 to lock with the jump buckle 13. At the same time, the jump buckle 60 drives the jump buckle 13 to rotate clockwise, so that the lock buckle 13 and the re-lock 15 are limited and matched. The operating mechanism 100 switches to Figure 2 and 5 The breaker status is shown.

[0134] Preferably, Figure 1 As shown in FIG-6, when the first spring 22 is at the first dead point, the first axis 67m is located on the first axis. Figure 1As shown in FIG. 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.

[0135] like Figure 23 As shown in FIG. 26 , the present invention further provides a connection structure to achieve a simple connection between the jumper 60 and the bracket 50 , as follows:

[0136] like Figure 23 As shown, the connection structure includes a bracket 50, a trip button 60, and a trip button shaft 11; the bracket 50 includes a bracket connecting plate 502 and a bracket arm 501 connected to the bracket connecting plate 502; the trip button shaft 11 is connected to the bracket arm 501; the trip button 60 is rotatably mounted on the trip button shaft 11, and the bracket 50 also includes a trip button positioning arm 503, which limits the position of the trip button 60 on both sides, restricting the axial position of the trip button 60 on the trip button shaft 11. Compared with the prior art method of riveting the trip button 60 and the trip button shaft 11 and then assembling it to the bracket 50, the connection structure is simpler to operate and reduces the requirements for the heat treatment process of the trip button 11, making it easy and quick to operate.

[0137] Preferably, Figure 24 and 26 As shown, the spacing W0 between the parts of the jump buckle positioning arm 503 located on both sides of the jump buckle 60 for limiting the jump buckle 60 matches the thickness of the jump buckle 60, ensuring the rotation flexibility of the jump buckle 60 while preventing the jump buckle 60 from moving along the extension direction of the jump buckle axis 11.

[0138] Preferably, Figure 23 As shown in Figures 24 and 26, at least two of the jumper positioning arms 503 are arranged at intervals relative to each other. Figure 23 and 24 As shown, the two tripping buckle positioning arms 503 are staggered along the axial direction of the tripping buckle shaft 11 and are respectively located on both sides of the tripping buckle shaft 11.

[0139] Preferably, Figure 23 -24 and 26 show a method for implementing the jump buckle positioning arm 503: two jump buckle positioning arms 503 are arranged at intervals relative to each other, one end of each jump buckle positioning arm 503 is connected to the bracket connecting plate 502, and the other end is blocked on one side of the jump buckle 60. Figure 23 As shown, one end of the two jump buckle positioning arms 503 is respectively connected to the bracket connecting plate 502 by bending, and the other end extends in the direction of the jump buckle shaft 11 and is respectively blocked on both sides of the jump buckle 60. The length of the jump buckle positioning arm 503 is greater than the distance between the jump buckle shaft 11 and the bracket connecting plate 502. Figure 23The side facing the reader is the front side, the rear end of the jump button positioning arm 503 is connected to the bracket connecting plate 502, and the front end extends in the direction of the jump button shaft 11. Figure 23 As shown, the jump buckle positioning shaft 503 and the bracket connecting plate 502 are an integrated structure, which is formed by cutting and bending the middle part of the bracket connecting plate 502.

[0140] Preferably, the following is another implementation of the jump-lock positioning arm 503 (not shown in the figure): the bracket 50 also includes a positioning arm connecting plate, one end of the positioning arm connecting plate is respectively connected to the two jump-lock positioning arms 503, and the other end is connected to the bracket connecting plate 502.

[0141] It should be pointed out that the setting method of the jump button positioning arm 503 is not limited to the above two implementation methods. The jump button positioning arm 503 can also be connected to the bracket arm 501. The jump button positioning arm 503 and the bracket 50 can be an integrated structure or a split structure assembled together later (through common connection means, such as welding, screw connection, riveting, etc.).

[0142] Preferably, the jump button positioning arm 503 includes a positioning arm avoidance hole for the jump button shaft 11 to pass through; or Figure 23 As shown, the tripping buckle positioning arm 503 includes a semicircular positioning arm avoidance groove for the tripping buckle shaft 11 to pass through, and the opening ends of the two positioning arm avoidance grooves are opposite to each other.

[0143] like Figure 23 and 24 As shown in FIG. 1 , an embodiment of the jump buckle positioning arm 503 is shown: two jump buckle positioning arms 503 are staggered along the axial direction of the jump buckle shaft 11 and are respectively located on both sides of the jump buckle shaft 11; Figure 23 As shown, the tripping buckle positioning arm 503 includes a semicircular positioning arm avoidance groove for the tripping buckle shaft 11 to pass through, and the opening ends of the two positioning arm avoidance grooves are arranged opposite to each other.

[0144] like Figure 23 -24, 26, is an embodiment of the connection structure: Figure 23 and 24 As shown, the bracket 50 is a U-shaped structure, including a bracket connecting plate 502 and two bracket arms 501 respectively connected to the two ends of the bracket connecting plate 502 by bending; Figure 26 As shown, the two ends of the jump buckle shaft 11 are respectively connected to the two bracket arms 501; Figure 23 、 24As shown in Figures 26, the jump buckle 60 is rotatably set on the jump buckle shaft 11, and the bracket 50 also includes two jump buckle positioning arms 503 located between the two bracket arms 501 and relatively spaced apart. 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 movement range of the jump buckle 60 along the extension direction of the jump buckle shaft 11 (that is, to limit the position of the jump buckle 60 in the axial direction of the jump buckle shaft 11).

[0145] like Figure 17 21 shows a fifth embodiment of the operating mechanism 100, which is specifically as follows:

[0146] like Figure 17 As shown in FIG-21, the operating mechanism 100 includes a bracket 50, a rocker assembly and a trip button 60 pivotally mounted on the bracket 50, a first crank 30 pivotally mounted on the trip button 60 around a first axis 67m, and a first spring 22; one end of the trip button 60 is rotatably connected to the bracket 50, serving as the trip button pivot end; the trip button 60 includes a trip button hole 605 for inserting the positioning pin 17, and the bracket 50 includes a bracket hole 508 for inserting the positioning pin 17, the trip button hole 605 and the bracket hole 508 are aligned, and the first spring 22 is provided. A spring shaft 46 is limitedly engaged with the trip latch 60, and one end of the first crank 30 swings away from the trip latch pivot end, so that 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, forming a first assembly state; 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, and the rocker arm assembly swings toward the trip latch pivot end, driving the first spring 22 and the first crank 30 to swing toward the trip latch pivot end, respectively, to form 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.

[0147] Specifically, such as Figure 17 As shown, the first assembly state is formed when the jump button hole 605 is aligned with the bracket hole 508, the first spring shaft 46 is limitedly engaged with the jump button 60, and one end of the first crank 30 is swung away from the jump button pivot end until it is limitedly engaged with the jump button 60. 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 to make the first spring shaft 46 away from the tripping buckle 60 and the axis of the first spring 22 swings through 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 in the direction of the tripping buckle pivot end until the first crank 30 is again limitedly engaged with the tripping buckle 60. At this time, the assembly of the first spring 22 is completed, and the operating mechanism 100 enters the state as shown in FIG. Figure 20The second assembly state shown. Further, as Figure 17 -18, 20-21, the right end of the jumper 60 is the jumper pivot end, "one end of the first crank 30 swings in the direction away from the jumper pivot end", that is, the lower end of the first crank 30 swings in the clockwise direction, and "the first crank 30 swings in the direction of the jumper pivot end", that is, the lower end of the first crank 30 swings in the counterclockwise direction.

[0148] Preferably, Figure 17 and 25 As shown, the jumper 60 further includes a jumper protrusion 66. In the first assembly state, the jumper protrusion 66 defines the swing position of the first crank 30. Figure 17 As shown, in the first assembly state, the jump buckle protrusion 66 is limitedly engaged with the first crank 30. Figure 17 and 18 As shown, the first spring shaft 46 and the second spring shaft 16 are respectively located on both sides of the jump buckle 60; the jump buckle protrusion 66 is located between the jump buckle shaft 11 and the jump buckle hole 605, and the first axis 67m is located between the jump buckle protrusion 66 and the jump buckle pivot end. Figure 17 and 18 In the direction shown, the first spring shaft 46 and the second spring shaft 16 are located on the upper side and the lower side of the jump buckle 60 respectively.

[0149] Preferably, Figure 17 、 18 As shown, the rocker arm assembly is set in the V-shaped groove of the bracket 50, the jump buckle pivot end is located on one side of the V-shaped groove, the lock buckle 13, the re-lock buckle 15 and the bracket hole 508 are located on the other side of the V-shaped groove, and the rocker arm 45 is pivoted at the bottom of the V-shaped groove. Figure 17 -18, the pivot end of the jump buckle is located on the right side of the V-shaped groove, and the lock buckle 13, the re-buckle 15 and the bracket hole 508 are located on the left side of the V-shaped groove.

[0150] like Figure 25 As shown, an embodiment of the jump buckle 60 is provided: the jump buckle 60 is a strip plate structure, one end of which is provided with a jump buckle shaft hole 601 and a limiting shoulder 602 that is limited to the bracket connecting plate 502 of the bracket 50, the other end of which is provided with a jump buckle hole 605 and a jump buckle table 604 that is locked with the lock buckle 13, the middle part of which is provided with a jump buckle protrusion 66 and a jump buckle-crank shaft hole, 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 in sequence; a driving side edge 603 and a limiting side edge 608 are respectively provided at the two edges in the longitudinal direction of the jump buckle 60, and the driving side edge 603 and the limiting side edge 608 are respectively located at the two ends of the longitudinal direction of the jump buckle 60.

[0151] Based on the operating mechanism 100 of the fifth embodiment, the present invention further 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:

[0152] In step 1, the jump button hole 605 of the jump button 60 is aligned with the bracket hole 508 of the bracket 50 and the positioning pin shaft 17 is inserted into the jump button 605 and the bracket hole 508, so that the operating mechanism enters the first assembly state.

[0153] Preferably, in step one, the jump button hole 605 and the bracket hole 508 are aligned and the positioning pin shaft 17 is installed between the two, the rocker arm 45 is swung in a direction away from the jump button pivot end, so that the first spring shaft 46 is limitedly engaged with the jump button 60, and the first crank 30 is swung in a direction away from the jump button pivot end so that it is limitedly engaged with the jump button 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.

[0154] 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.

[0155] Preferably, in step 2, 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 button 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 through the rotation center of the first crank 30 (i.e., the first axis 67m), and 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 button pivot end until the first crank 30 is again limited by the jump button 60, and the operating mechanism enters the second assembly state, and the first spring 22 is assembled.

[0156] Preferably, the operating mechanism assembly method of the present invention 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 shaft 17 is pulled out, and the first spring 22 drives the jump buckle 60 to rotate to match the reset structure 42 in a limited position.

[0157] Preferably, the operating mechanism assembly method of the present invention further includes steps 4 and 5, the order of which can be interchanged: Step 4, assemble the slider 26 onto the slide rail 25, and rotate and assemble the two ends of the first connecting rod 27 onto the second spring shaft 16 and the slider 26. Step 5, pivotally mount the lock catch 13 onto the bracket 50 via the lock catch shaft 12, and pivotally mount the re-catch 15 onto the bracket 50 via the re-catch shaft 14.

[0158] Preferably, the operating mechanism assembly method of the present invention also includes the following operations performed before step one: assembling the second spring shaft 16 on the first crank 30, pivoting the first crank 30 around the first axis 67m to set it on the trip lock 60, and pivoting the trip lock 60 to set it on the bracket 50; installing the first spring shaft 46 on the rocker arm 45 of the rocker arm assembly, and pivoting the rocker arm 45 to set it in the V-groove of the bracket 50.

[0159] Preferably, Figure 7 As shown in Figures 16 and 35, the movable contact mechanism further includes a contact spring 23, one end of which is connected to the movable contact 9, and the other end is connected to the contact support 110. When the movable contact 9 and the static contact 18 are closed, the first force is applied to the movable contact 9 so that the movable contact 9 presses the static contact 18. 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. Figure 29 and 33 As shown, the movable contact 9 includes a movable conductive rod 90 , and the movable conductive rod 90 is provided with a conductive rod slot 902 that cooperates with the third spring shaft 201 .

[0160] Preferably, Figure 14 -16, the contact spring 23 can also realize the locking of the moving contact 9. Specifically: the two ends of the contact spring 23 are the third end of the spring and the fourth end of the spring, the third end of the spring is connected to the moving contact 9, and the fourth end of the spring is connected to the contact support 110. The geometric axis of the contact spring 23 is the second axis, and the second axis coincides with the line connecting the third end of the spring and the fourth end of the spring; combined Figure 11As shown, when the moving contact 9 is normally closed or normally disconnected, 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 position or the normally disconnected 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, so that the second axis swings to the other side of the third axis 111s, so that the moving contact 9 remains in the temporarily disconnected 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 not only realizes the overtravel of the moving contact 9, thereby ensuring reliable contact between the moving contact 9 and the static contact 18, but also locks the moving contact 9 in a temporary disconnection position when the moving contact 9 is repelled by the electric repulsive force generated by the short-circuit current. Therefore, when a short-circuit fault occurs, the moving contact 9 does not rebound after being repelled, thereby ensuring reliable disconnection between the moving contact 9 and the static contact 18. It should be pointed out that when the moving contact 9 is in the temporary disconnection position, if the operating mechanism 100 switches from the closed state to the open state, the moving contact 9 automatically moves from the temporary disconnection position to the normal disconnection position.

[0161] Preferably, Figure 11 As shown, the moving contact 9 and the static contact 18 are closed, and the 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 static contact 18 opposite to the moving contact 19, an electric repulsive force is generated between the two, causing the moving contact 9 to be repelled.

[0162] Preferably, Figure 14 As shown in FIG-16 , the movable contact 9 drives the contact spring 23 to rotate, so that the second axis swings from one side of the third axis 111s to the other side thereof, and the contact spring 23 passes through the second dead point position; Figure 15 As shown, when the contact spring 23 is located at the second dead point, the third axis 111s is located on the second axis.

[0163] 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 act synchronously, the two are relatively stationary, and the second axis of the contact spring 23 always remains on the same side of the third axis 111s. Only when the moving contact 9 and the static contact 18 are closed, a small deformation occurs to provide an overtravel force for the moving contact 9, ensuring that the moving contact 9 and the static contact 18 are tightly closed; Figure 14-16, 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 (because the operating mechanism is in the closed state, the contact support 110 remains stationary), and the moving contact 9 (through the third spring shaft 201) drives the contact spring 23 to rotate counterclockwise around the fourth end of the spring, as shown in FIG. Figure 15 As shown, when the contact spring 23 rotates to the second dead point position, the energy storage of the contact spring 23 reaches the maximum value, and the third axis 111s is located on the second axis, as shown in FIG. 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, the second axis rotates through the third axis 111s, which means that 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 quickly to the temporary disconnecting position, so that the moving contact 9 remains in the temporary disconnecting position. Finally, the second axis moves from the lower side of the third axis 111s to its upper side.

[0164] The present invention further 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 follows:

[0165] like Figure 29 As shown in Figures 34, 45-46, the movable contact assembly includes a conductor 70, a non-elastic fastener 80 and a movable contact 9. The conductor 70 includes a first clamping arm 710 and a second clamping arm 711 that are relatively spaced apart. The movable contact 9 includes a movable conductive rod 90 and a movable contact 94. The movable contact 94 is provided at one end of the movable conductive rod 90. The movable conductive rod 90 includes a conductive rod contact portion provided at the other end thereof. 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 Figures 34 and 45-46, the conductor 70 further includes a conductor connecting plate 712, and two ends of the conductor connecting plate 712 are respectively bent and connected to the first clamping arm 710 and the second clamping arm 711.

[0166] Compared with the existing technology, such as Japanese patent JP3794163B2, which uses a double torsion spring to compress the conductor and the moving contact, the moving contact assembly of the present invention, whose fastener 80 realizes a hard connection between the conductor 70 and the conductive rod 90, ensures a reliable structure and electrical connection between the contact part of the conductor 70 and the conductive rod while ensuring that the movable conductive rod 90 has a certain degree of flexibility.

[0167] It should be noted that the “non-elastic fastener 80 ” refers to the fastener 80 that will not be elastically deformed due to external force.

[0168] Preferably, Figure 30 、 31 As shown in , 34 and 45 , the conductor 70 further includes a conductor connecting plate 712 , both ends of which are connected to the first clamping arm 710 and the second clamping arm 711 by bending; Figure 29 and 30 As shown, the fastener 80 is disposed between the conductor connecting plate 712 and the contact portion of the conductive rod, so that the first clamping arm 711 and the second clamping arm 710 tighten the contact portion of the conductive rod. Figure 30 、 31 As shown in Figures 34 and 45, the conductor connecting plate 712, the first clamping arm 710, and the second clamping arm 711 form a U-shaped structure as a whole. 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 conductor connecting plate 712 and the movable conductive rod 90.

[0169] Preferably, Figure 30 、 31 As shown in , 34 and 45 , the first clamp arm 710 and the second clamp arm 711 each include a clamp arm straight portion and a clamp arm bent portion, the two ends of the clamp arm bent portion are respectively connected to the clamp arm straight portion and the conductor connecting plate 712 by bending, and the two clamp arm bent portions respectively cause the clamp arm straight portions of the first clamp arm 710 and the second clamp arm 711 to deviate toward the middle of the clamp arm connecting plate 712, the fasteners 80 are provided on the two clamp arm straight portions and are respectively fixedly connected to the two clamp arm straight portions, and the movable conductive rod 90 is rotatably connected to the two clamp arm straight portions. Further, as Figure 31 and 34 As shown, the straight portion of the first clamp arm 710 is provided with a first clamp arm hole 7101 and a first clamp arm shaft hole 7102 (or a first clamp arm shaft platform 7103), and the straight portion of the second clamp arm 711 is provided with a second clamp arm hole 7111 and a second clamp arm shaft hole 7112 (or a second clamp arm shaft platform 7113).

[0170] Preferably, Figure 38 As shown, the unit housing 120 includes a terminal block slot 120 - 4 that is plugged into and matched with the conductor terminal block 700 .

[0171] Preferably, Figure 31 As shown, when the fastener 80 is not installed, the distance between the first clamping arm 710 and the second clamping arm 711 is D1. 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 have not yet been assembled together, and 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.

[0172] Preferably, Figure 30 and 45 As shown, the inner side wall of the first clamping arm 710 is in point contact or line contact with the contact portion of the conductive rod, and the inner side wall of the second clamping arm 711 is in surface contact with the contact portion of the conductive rod; the contact manner of the first clamping arm 710 and the second clamping arm 711 with the contact portion of the conductive rod is conducive to increasing the contact area between the conductor 70 and the moving contact 9, improving the conductive performance of the moving contact mechanism, and maintaining the movable performance between the two.

[0173] Preferably, Figure 30 and 45 As shown, one end of the fastener 80 is fixedly connected or locked to the first clamping arm 710, and the other end is fixedly connected to the second clamping arm 711. Furthermore, the fastener 80 is a rivet, one end of which is a rivet head 801, which is locked to the first clamping arm 710, and the other end of which is a riveted end 803, which is fixedly connected to the second clamping arm 711.

[0174] Preferably, Figure 32 As shown, the fastener 80 is a rivet. Figure 32 FIG. 8 is an embodiment of the fastener 80 . The fastener 80 includes a rivet head 801 , a rivet body 802 , and a riveted end 803 , which are sequentially arranged. The outer diameter of the rivet head 801 is larger than the outer diameter of the rivet body 802 . The connection between the rivet head 801 and the rivet body 802 forms a first ring surface 804 . The outer diameter of the rivet body 802 is larger than the outer diameter of the riveted end 803 . The connection between the rivet body 802 and the riveted end 803 forms a second ring surface 805 . Figure 30 and 45 As shown, the first ring table 804 is limitedly matched with the first clamping arm 710, and the rivet body 802 passes through the first clamping arm 710 so that the second ring table 805 is in surface contact with 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, L0<D1+D3.

[0175] It should be pointed out that Figure 30 and 45As shown, the inner side wall of the first clamping arm 710 is in line contact 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 mode is that when the rivet is riveted, the second ring table 805 is in surface contact with the second clamping arm 711, so the rivet head 801 will cause the connection (bend 720) between the first clamping arm 710 and the conductor connecting plate 712 to deform, causing the first clamping arm 710 to tilt toward the direction of the second clamping arm 711, thereby causing the first clamping arm 710 to be in line contact or point contact with the movable conductive rod 90, and causing the movable conductive rod 90 to be in surface contact with the second clamping arm 711, thereby significantly increasing the contact area between the conductive rod contact portion and the conductor 70, improving the conductive performance of the movable contact mechanism, and reducing the heat generated during the conductive process of the movable contact assembly, thereby extending the service life of the movable contact assembly.

[0176] Preferably, Figure 31 and 34 As shown, the first clamp arm 710 is provided with a first clamp arm hole 7101 for the rivet body 802 to pass through, and the second clamp arm 711 is provided with a second clamp arm hole 7111 for the riveted end 803 to pass through. The inner diameter of the first clamp arm hole 7101 is larger than the inner diameter of the second clamp arm hole 7111.

[0177] like Figure 31 As shown, this is a first connection method of the movable conductive rod 90 and the conductor 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; Figure 30 As shown, the movable contact assembly further includes a contact shaft 10, with its two ends respectively inserted into the first clamp arm shaft hole 7102 and the second clamp arm shaft hole 7112. The movable conductive rod 90 is a strip-shaped plate structure, one end of which is a conductive rod contact portion, which is rotatably mounted on the contact shaft 10. Furthermore, the movable contact mechanism includes two contact springs 23, which are respectively arranged on both sides of the movable contact 9. One end of each contact spring 23 is connected to the movable 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.

[0178] like Figure 34 As shown, this is a second connection method between the conductive rod 90 and the conductor 70: the first clamping arm 710 is further provided with a first clamping arm shaft platform 7103, and the second clamping arm 711 is further provided with a second clamping arm shaft platform 7113; the movable conductive rod 90 is a strip plate structure, one end of which is a conductive rod contact portion, and the conductive rod contact portion is provided with a conductive rod shaft hole 901, and the first clamping arm shaft platform 7103 and the second clamping arm shaft platform 7113 are relatively inserted into the conductive rod shaft hole 901. Further, as Figure 34As shown, the first clamping arm boss 7103 and the second clamping arm boss 7113 are respectively annular bosses formed by pressing the first clamping arm 710 and the second clamping arm 711 relative to each other. The first clamping arm boss 7103 and the second clamping arm boss 7113 facilitate increasing the contact area between the conductor 70 and the movable conductive rod 90. Furthermore, the movable contact mechanism includes two contact springs 23, which are respectively arranged on either side of the movable contact 9. One end of each contact spring 23 is connected to the movable 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.

[0179] like Figure 45 and 46 As shown, this is a third connection method between the conductive rod 90 and the conductor 70: the movable conductive rod 90 also 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 bottom plate and two conductive rod contact plates 907 that are bent and connected to both ends of the contact portion bottom plate and are relatively spaced apart, and the first clamping arm 710 and the second clamping arm 711 are respectively 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 is 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 movable contact mechanism includes at least one contact spring 23, which is located between the two conductive rod contact plates 907, one end of which is connected to the movable contact 9 through the third spring shaft 201, and the other end is connected to the contact support 110 through the fourth spring shaft 202. 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 .

[0180] Preferably, Figure 11 As shown in Figures 16, 35, 37-40, and 45, the moving contact mechanism further includes a moving contact insulator 140. The moving contact insulator 140 cooperates with the moving contact 9 to significantly increase the insulation gap and creepage distance between the moving contact 9 and the static contact 18. In addition, the moving contact insulator 140 can prevent arc particles generated when the moving contact 9 and the static contact 18 are disconnected from entering the contact support 110, attaching to the contact spring 23 and affecting its elasticity, and attaching to the rotating shaft of the moving contact 9 and affecting its operating performance. The following is an implementation of the moving contact insulator 140, which is specifically as follows:

[0181] The moving contact insulator 140 includes an insulating body, which includes an insulating base plate 140-9 and an insulating side wall 140-1. A moving contact accommodating cavity 140-2 for accommodating the moving contact 9 is formed in the middle of the insulating body. The moving contact insulator also includes a main baffle 140-4 and a main isolation plate 140-5. The main baffle 140-4 is arranged on the outside of the insulating base plate 140-9 and extends downward. The main isolation plate 140-5 is vertically connected to the insulating side wall 140-4 and protrudes outside the insulating side wall 140-4. The main isolation plate 140-5 extends along the length direction of the insulating body. The moving contact insulator 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 static contact 18. Further, as Figure 35 and 37 As shown, the main isolation plate 140-5 extends from one end of the insulation body to the other end of the insulation body. Figure 35 and 37 As shown, one end of the insulating body is close to the moving contact point of the moving contact 9, which is the first end of the body, and the other end of the insulating 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.

[0182] Preferably, Figure 37 As shown, the main baffle 140-4 and the main isolation plate 140-5 are an integrated structure. Figure 37 As shown, the main baffle 140-4, the main isolation plate 140-5 and the insulation body are an integrated structure.

[0183] Preferably, Figure 37 As shown, the two insulating member side walls 140-1 are spaced apart from each other, and main isolation plates 140-5 are provided on both sides of the insulating member body. The two main isolation plates 140-5 are respectively vertically arranged on both sides of the two insulating member side walls 140-4 and protrude toward both sides of the two insulating member side walls 140-1. One end of each main isolation plate 140-5 is connected to one end of a main baffle 140-4. Figure 37 As shown, the cross section of the insulating member body is a U-shaped structure, and the main baffle 140-4 and the main isolation plate 140-5 are overall U-shaped structures, which are surrounded by the outside of the insulating member body.

[0184] Specifically, such as Figure 37In the direction shown, the moving contact accommodating chamber 140-2 is located on the upper side of the insulating member bottom plate 140-9 (also the inner side of the insulating member bottom plate 140-9), and the two main isolation plates 140-5 are vertically connected to the left and right sides of the two insulating member side walls 140-1 respectively. The main baffle 140-4 is arranged on the lower side of the insulating member bottom plate 140-9 (also the outer side of the insulating member bottom plate 140-9) and extends downward to the insulating member bottom plate 140-9. The main isolation plates 140-5 extend from the front end of the insulating member main body to the rear end of the insulating member main body (that is, the two ends of the length direction of the insulating member main body).

[0185] Preferably, Figure 35 and 37 As shown, the main isolation plate 140-5 is in a bell-mouth shape as a whole, and the opening direction of the bell-mouth shape is toward the outside of the insulating member bottom plate 140-9. Furthermore, the opening direction of the bell-mouth shape of the main isolation plate 140-5 is opposite to the opening direction of the moving contact accommodating cavity 140-2. Specifically, as Figure 37 In the direction shown, the opening direction of the trumpet-shaped portion faces downward, and the opening direction of the moving contact accommodating cavity 140 - 2 faces upward.

[0186] Preferably, 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, and one end of the isolation plate tail 140-53 is connected to the main baffle 140-4; the free end of the isolation plate head 140-50 is arranged near the moving contact 94 of the moving contact 9. Figure 35 and 37 As shown, the upper side of the isolation plate belly 140-52 is flush with the opening side of the moving contact accommodating cavity 140-2.

[0187] like Figure 14-16, 35-37 show an embodiment of the cooperation between the moving contact 9, the moving contact insulating member 140 and the contact support 110: the moving conductive rod 90 of the moving contact 9 is inserted into the moving contact accommodating cavity 140-2, and the moving contact 9 and the moving contact insulating member 140 form a first component; the middle part of the contact support 110 is provided with a support assembly cavity 110-0, the first component and the contact spring 23 are respectively arranged in the support assembly cavity 110-0, and the insulating member bottom plate 140-9 is connected to the support assembly cavity The supporting bottom wall 110-9 of 110-0 abuts against each other; the moving contact insulating member 140 protrudes from one end of the supporting 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 electromotive 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 exposed gap is formed between the insulating member bottom plate 140-9 and the bottom wall of the supporting assembly cavity 110-9, and the main baffle 140-4 blocks the exposed gap on one side of the contact support 110.

[0188] 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 rotated counterclockwise, so that an exposed gap with an angle of θ is formed between the insulating member bottom plate 140-9 and the support bottom wall 110-9. When the moving contact 9 and the static contact 18 are initially separated, a large number of arc particles are generated, and the main baffle 140-4 is located on the right side of the contact support 110 to block the exposed gap, thereby preventing the arc particles from entering the contact support assembly cavity through the exposed gap and being deposited on the contact spring 23 and / or the contact shaft 10, thereby affecting the operating performance of the moving contact mechanism.

[0189] Preferably, Figure 37 As shown, the moving contact insulator also includes a secondary baffle 140-7, and secondary baffles 140-7 are provided on both sides of the insulator body. The secondary baffles 140-7 and the main baffle 140-5 are arranged side by side and spaced apart, 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 vertically connected to the side wall 140-1 of the insulator and protrude outward from the side wall 140-1 of the insulator; one end of each of the secondary baffles 140-7 protrudes on one side of the insulator bottom plate 140-9 to form a secondary baffle protrusion, and the secondary baffle protrusions located on both sides of the insulator body are connected to each other. Further, as Figure 37 As shown, the two auxiliary baffles 140-7 are respectively vertically arranged on both sides of the two insulating member side walls 140-2 and protrude toward both sides of the two insulating member side walls 140-2. One end of the two auxiliary baffles 140-70 protrudes on one side of the insulating member bottom plate 140-9 and is connected to each other, so that the two auxiliary baffles 140-70 form a U-shaped structure as a whole.

[0190] Specifically, such as Figure 37In the direction shown, the auxiliary baffle 140-7 is arranged at the rear end of the insulating member body and is vertically connected to the left and right sides of the insulating member side wall 140-1 respectively. The lower ends of the two auxiliary baffles 140-7 protrude from the lower side of the insulating member bottom plate 140-9 and are connected as a whole. The auxiliary baffle 140-7 is located on the rear side of the main baffle 140-4 and is arranged side by side with it; the upper end of the auxiliary baffle 140-7 is flush with the opening side of the moving contact accommodating cavity 140-2.

[0191] Preferably, Figure 36 As shown, the auxiliary baffle 140-7 is located in the support assembly cavity 110-0 and cooperates with the side walls of the support assembly cavity 110-0 to block the exposed gap. Figure 37 As shown, the contact support 110 includes two spaced-apart supporting ribs at one end of the support assembly cavity 110-0. These ribs are formed by inwardly bending one end of the two side walls of the support assembly cavity 110. These ribs are offset and engage with two auxiliary baffles 140-7, respectively, to block the exposed gap. The auxiliary baffles 140-7 cooperate with the contact support 110 to further prevent arc particles generated when the moving and static contacts separate from each other from entering the support assembly cavity 110-0 through the exposed gap, thereby extending the service life of the moving contact mechanism.

[0192] Preferably, Figure 35 As shown, the insulating member body includes a first main body section and a second main body section connected by bending, the main isolation plate 140-5 and the main baffle 140-4 are respectively connected to the first main body section, and the auxiliary baffle 140-7 is connected to the second main body section. Figure 35 As shown, the insulating member body is a U-shaped structure, and the shape of the insulating member body matches the shape of the moving conductive rod 90 of the moving contact 9.

[0193] Preferably, Figure 37 As shown, the insulating body includes a first connection hole 140-3 and a tail connection hole 140-6 respectively provided at both ends thereof, for inserting the first connection pin and the tail connection pin respectively, to fix the insulating body and the moving contact 9 together. Figure 35 As shown, when the moving contact 9 and the moving contact insulating member 140 are assembled, the moving conductive rod 90 of the moving contact 9 is inserted into the moving contact accommodating cavity 140-2, as shown in FIG. Figure 33 As shown, the moving conductive rod 90 includes a first moving contact connecting hole 905 and a second moving contact connecting hole 903 respectively arranged at both ends thereof. The first moving contact connecting hole 905 is aligned with the first connecting hole 140-3, and the first connecting pin is inserted between the two. The second moving contact connecting hole 903 is aligned with the tail connecting hole 140-6, and the tail connecting pin is inserted between the two to achieve a 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 constitute a first component.

[0194] like Figure 33 The figure shows a first embodiment of the movable contact 9. This embodiment is a single-breakpoint movable contact. The movable contact 9 includes a movable conductive rod 90 and a movable contact 94. The movable conductive rod 90 is a strip-shaped plate with the movable contact 94 at one end and a conductive rod contact portion at the other end. The movable conductive rod 90 is provided with a first movable contact connection hole 905, a second movable contact connection hole 903, and a movable contact shaft hole 901. The first movable contact connection hole 905 and the movable contact shaft hole 901 are respectively located at both ends of the movable conductive rod 90. The second movable contact connection hole 903 is located in the middle of the movable conductive rod 90 and is located near the movable contact shaft hole 901. The movable conductive rod 90 is also provided with a movable contact slot 902, and the conductive rod contact portion is provided with a contact protrusion 906. Furthermore, the movable conductive rod 90 is a U-shaped structure, matching the shape of the insulating member body.

[0195] Preferably, the conductive rod contact portion is a circular plate structure, and the contact protrusion 906 drivingly engaged with the first push rod 150 is provided on the circumferential side wall of the conductive rod contact portion.

[0196] It should be pointed out that the movable contact 9 of the first embodiment is suitable for the first and second connection modes of the movable contact 9 and the conductor 70 .

[0197] like Figure 46 The figure shows a second embodiment of the movable contact 9. The movable contact 9 of this embodiment is a single-breakpoint movable contact: the movable contact 9 includes a movable conductive rod 90 and a movable contact 94. The movable conductive rod 90 includes a conductive rod body 90-2 and a conductive rod contact portion. The conductive rod body 90-2 is provided with a movable contact 94 at one end, and the other end is connected to the conductive rod contact portion; the conductive rod contact portion is a U-shaped structure, including a contact portion base plate and two conductive rod contact plates 907 that are respectively bent and connected to the two ends of the contact portion base plate and arranged relatively spaced apart. The conductive rod body 90-2 is connected to the middle part of one side of the contact portion base plate and is located on both sides of the contact portion base plate respectively. A first movable contact connection hole 905 and a second movable contact connection hole 903 (not shown in the figure) are respectively provided at both ends of the conductive rod body 90-2. A movable contact slot 902 is provided at an edge of the connection end of the conductive rod contact plate 907 and the contact portion base plate.

[0198] It should be pointed out that the movable contact 9 of the second embodiment is suitable for the third connection method between the movable contact 9 and the conductive rod 70 .

[0199] like Figure 10The figure shows a third embodiment of the movable contact 9. This embodiment is a dual-breakpoint movable contact. The movable contact 9 has a centrally symmetrical structure and includes a movable conductive rod 90 and two movable contacts 94, a first movable contact 94-0 and a second movable contact 94-1, disposed at either end of the movable conductive rod 90. These contacts are used in conjunction with two stationary contacts 18 (the two stationary contacts 18 are a first stationary contact 18-0 and a second stationary contact 18-1). Rotating the movable contact 9 simultaneously closes and opens the contact with both stationary contacts 18. In this embodiment, the movable contact 9 does not require electrical connection via a conductor 70 but is instead directly disposed on the contact support 110.

[0200] like Figure 11 and 38 As shown, an embodiment of the static contact 18 is shown: the static contact 18 includes a static contact bridge 18-1 and a static contact point 18-0 arranged at one end of the static contact bridge 18-1; the static contact bridge 18-1 includes a U-shaped portion and a bent portion, the bent portion is a く-shaped structure, the static contact point 18-0 is arranged on a side arm of the U-shaped portion, the bent portion includes a first plate and a second plate connected by a bend, the two ends of the first plate are respectively connected to the U-shaped portion and the second plate by a bend, and the second plate is arranged parallel to the side arm of the U-shaped portion.

[0201] like Figure 36 As shown, an embodiment of the contact support 110 is shown: the contact support 110 is a semi-cylindrical structure as a whole, including two supporting side walls 110-4, a supporting bottom wall 110-9 and a supporting assembly cavity 110-0 that are relatively spaced apart. The two ends of the supporting bottom wall 110-9 are respectively bent and connected to the two supporting side walls 110-4. The supporting assembly cavity 110-0 is formed between the two supporting side walls 110-4. One end of the two supporting side walls 110-4 is respectively bent inward to form two supporting matching ribs that are relatively spaced apart. The other ends of the two supporting side walls 110-4 are provided with two supporting card grooves 110-2 that match the two ends of the fourth spring shaft 202 on the inner side; the supporting side wall 110-4 is a semi-circular plate structure, and a supporting shaft groove 111 is provided at the center of its outer circle. A supporting connection hole 110-5 is provided at one radial end of the supporting side wall 110-4.

[0202] like Figure 39 As shown in FIG-44, the present invention further discloses a fast tripping device, which causes the operating mechanism 100 to trip quickly when a short circuit fault occurs in the circuit breaker and the moving contact 9 is bounced open, thereby preventing the moving contact 9 and the static contact 18 from closing again; and the operating mechanism 100 will not trip during the normal disconnection / closing process of the moving contact 9 and the static contact 18; the details are as follows.

[0203] like Figure 39-44, the fast tripping device includes an operating mechanism 100, a moving contact mechanism and a static contact 18, the moving contact mechanism includes a contact support 110 and a moving contact 9; the operating mechanism 100 is connected to the moving contact mechanism by driving, so that the moving contact 9 and the static contact 18 are closed or disconnected; the fast tripping device also includes a first push rod 150 pivotally arranged on the contact support 110, the first push rod 150 includes a first push rod driven end and a first push rod driving end, the first push rod driven end is driven to cooperate with the moving contact 9, and the first push rod driving end cooperates 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, and the moving contact 9 contacts the first push rod driven end after rotating through the driving gap, and the moving contact 9 drives the first push rod 150 to rotate, so that the operating mechanism 100 is tripped. The fast tripping device of the present invention has a moving contact 9 and a contact support 110 that rotate synchronously. Therefore, in the process of the moving contact mechanism rotating to normally close or disconnect the static contact 9 and the static contact 18, the driving gap between the moving end of the first push rod and the moving contact 9 remains unchanged, and the moving contact 9 and the static contact 18 will rebound when they come into contact. 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 static contact 18 are closed, thereby avoiding the malfunction of the fast tripping device. When a short circuit fault occurs, the moving contact 9 is quickly repelled away 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 re-lock 15 to release the limit fit with the lock buckle 13, so that the lock buckle 13 and the trip buckle 60 are released from the lock fit, and the circuit breaker can be quickly opened.

[0204] 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, so that a driving gap is always maintained between the first push rod 150 and the moving contact 9, and the fast trip 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 static contact 18, the moving contact 9 will rebound to a certain extent. Due to the existence of the driving gap, the moving contact 9 will not contact the first push rod 150 when rebounding, and thus the fast trip device will not be activated; as shown Figure 40 As shown, when a short-circuit current flows through the circuit breaker of the present invention, a huge electric repulsive force causes the moving contact 9 to be repelled, and its rotation angle is much larger than the rebound amplitude that occurs when the moving contact 9 and the static contact 18 are closed. Therefore, the moving contact 9 will rotate through the driving gap and contact the first push rod driven end and drive the first push rod 150 to rotate. The first push rod driving end drives the operating mechanism 100 to trip (that is, the lock 13 and the tripping lock 60 are released from the lock engagement), thereby causing the circuit breaker to trip or open quickly to prevent the moving contact 9 and the static contact 18 from closing again.

[0205] It should be pointed out that the “moving contact repelled by 9 times the short-circuit current” means that when the short-circuit current flows through the closed moving contact 9 and the U-shaped static contact 18, due to the existence of a short-circuit current in the opposite direction of the U-shaped static contact 18, a large electric repulsive force is generated between the moving contact 9 and the static contact 18, causing the moving contact 9 and the static contact 18 to be disconnected.

[0206] Preferably, the actuated end of the first push rod includes an actuated protrusion or an actuated groove.

[0207] Preferably, the moving contact 9 includes a driving groove or a driving protrusion.

[0208] Specifically, the first push rod driven end and the moving contact 9 can be matched by the driven protrusion and the driving protrusion, or by the driven groove and the driving protrusion, or by the driven groove and the driving groove, or by the driven protrusion and the driving groove.

[0209] Preferably, Figure 39 As shown in FIG-40 , the movable contact 9 includes a movable conductive rod 90, which includes a contact protrusion 906 that is driven and matched with the first push rod 150, and a driving gap is provided between the contact protrusion 906 and the driven end of the first push rod. Figure 40 As shown, the middle portion of the first push rod 150 is pivotally mounted on the contact support 110, and includes a first push rod driven arm 150-1 (the first push rod driven end) and a first push rod driving arm 150-2 (the first push rod driving end) respectively arranged at both ends thereof, which are respectively driven by the moving contact 9 and the intermediate transmission structure, and 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, and one end of the first push rod driven arm 150-1 and the first push rod driving arm 150-2 are respectively connected to the first push rod mounting portion 150. Figure 39 and 40 As shown, the first push rod 150 is pivotally arranged on the contact support 110 via a fourth spring axis 202 .

[0210] Preferably, Figure 39 As shown in FIG. 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 cooperates with the second push rod 180 through the intermediate transmission structure. The second push rod 180 cooperates with the operating mechanism 100 to drive the operating mechanism 100 to trip. Figure 41 As shown, the second push rod 180 is drivingly engaged with the re-lock 15 of the operating mechanism 100 .

[0211] Preferably, Figure 39As shown in FIG. 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 and matched with the driving end of the first push rod. The first intermediate shaft 161 is arranged to rotate 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 and matched with the second push rod 180. Further, as shown in FIG. Figure 39 As shown in FIG. 42 , the first intermediate shaft 161 is inserted into the unit housing 120 , and the inner end and outer end of the first intermediate shaft 161 are respectively connected to the first intermediate push rod 160 and the second intermediate push rod 170 - 1 by driving. 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 arranged on the bracket 50 of the operating mechanism 100.

[0212] Preferably, Figure 42 As shown, one end of the first intermediate shaft 161 is provided with a shaft limiting plane 161-0, the second intermediate push rod 170 is provided with a second intermediate push rod hole 170, and the side wall of the second intermediate push rod hole 170 is provided with a hole limiting plane, which is limited and matched with the shaft limiting plane 161-0.

[0213] Preferably, Figure 40 As shown in FIG. 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 matched with the first push rod 150 ; Figure 39 and 40 As shown, the rapid trip device further includes a push rod limiting protrusion 120-9 that cooperates with the first intermediate push rod limiting arm 160-2. Figure 40 As shown in FIG. 42 , the middle portion of the first intermediate push rod 160 is fixedly connected to the first intermediate shaft 161 .

[0214] Preferably, Figure 39 and 40 As shown, the first push rod 150 and the push rod limiting protrusion 120-9 are respectively located on both sides of the first intermediate push rod 160. Figure 40 As shown in FIG. 42 , the push rod limiting protrusion 120 - 9 is provided on the unit housing 120 . It should be noted that the placement of the push rod limiting protrusion 120 - 9 is not limited to the above-mentioned one, as long as it can function to limit the swing amplitude of the first intermediate push rod 160 .

[0215] Preferably, Figure 41 As shown, the second push rod 180 is a triangular plate structure, one of which is provided with a push rod driven hole 180-2 for inserting the second intermediate shaft 170-2 and driving it, the second top corner is pivoted by the second push rod shaft 4, and the third top corner is provided with a push rod driving finger 180-1 for driving with the re-lock 15. Figure 41 As shown, the second push rod 180 is pivotally arranged outside the unit housing 120 through the second push rod shaft 4.

[0216] Preferably, the re-lock 15 includes a re-lock actuated column 15 - 9 drivingly matched with the second push rod 180 , and the re-lock actuated column 15 - 9 drivingly matched with the push rod driving finger 180 - 1 .

[0217] Preferably, 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 arranged 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 arranged outside the unit housing 120.

[0218] Preferably, Figure 44 As shown, the circuit breaker of the present invention includes a plurality of circuit breaker poles 300 arranged side by side, each circuit breaker 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. Figure 44 As shown, each of the circuit breaker poles includes an independent second push rod 180 ; or two adjacent circuit breaker poles share one second push rod 180 .

[0219] Specifically, such as Figure 44 As shown, the circuit breaker of the present invention includes three disconnecting poles 300 arranged side by side. The disconnecting poles 300 on the left and the middle share the second push rod 180 , while the disconnecting pole 300 on the right includes an independent second push rod 180 .

[0220] Preferably, Figure 38 and 43 As shown, each of the unit housings 120 includes a first connecting ear 120-1 and a second connecting ear 120-3 arranged on the side wall of one end thereof; the second push rod shaft 4 passes through each second connecting ear 120-3 to connect each unit housing 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 first connecting ear 120-1 to connect the operating mechanism 100 and the unit housing 120 together.

[0221] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A fast tripping device, comprising an operating mechanism (100), a moving contact mechanism and a stationary contact (18), wherein the moving contact mechanism comprises a contact support (110) and a moving contact (9); the operating mechanism is connected to the moving contact mechanism for driving the moving contact (9) and the stationary contact (18) to close or open; Its characteristics are: The fast tripping device also includes a first push rod (150) pivotally arranged on the contact support (110), the first push rod (150) including a first push rod driven end and a first push rod driving end, the first push rod driven end is driven and matched with the moving contact (9), and the first push rod driving end is driven and matched with the operating mechanism (100) to make it trip; a driving gap is provided between the first push rod driven end and the moving contact (9); when the moving contact (9) is electrically repelled by the short-circuit current, the moving contact (9) rotates relative to the contact support (110), and the moving contact (9) contacts the first push rod driven end after rotating through the driving gap, and the moving contact (9) drives the first push rod (150) to rotate, so that the operating mechanism (100) trips; when the moving contact (9) and the static contact (18) are closed, due to the driving gap, the moving contact (9) does not contact the first push rod driving end when it rebounds.

2. The fast tripping device according to claim 1, characterized in that: The actuated end of the first push rod includes an actuated protrusion or an actuated groove.

3. The fast tripping device according to claim 1, characterized in that: The moving contact (9) comprises a driving groove or a driving protrusion.

4. The fast tripping device according to claim 1, characterized in that: The movable contact (9) includes a movable conductive rod (90), the movable conductive rod (90) includes a contact protrusion (906) drivingly matched with the first push rod (150), and a driving gap is provided between the contact protrusion (906) and the driven end of the first push rod.

5. The fast tripping device according to any one of claims 1 to 4, characterized in that: The rapid tripping device further comprises an intermediate transmission structure and a second push rod (180); the driving end of the first push rod is driven in cooperation with the second push rod (180) through the intermediate transmission structure; the second push rod (180) is driven in cooperation with the operating mechanism (100) to drive the operating mechanism (100) to trip.

6. The fast tripping device according to claim 5, characterized in that: The intermediate transmission structure comprises 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 drivingly matched with the first push rod driving end; 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; the first intermediate shaft (161) is arranged to rotate around its axis; one end of the second intermediate shaft (170-2) is connected to the second intermediate push rod (170-1), and the other end is drivingly matched with the second push rod (180).

7. The fast tripping device according to claim 6, characterized in that: The first intermediate push rod (160) comprises a first intermediate push rod driven arm (160-1) drivingly matched with the first push rod (150), and a first intermediate push rod limiting arm (160-2); the fast trip device comprises a push rod limiting protrusion (120-9) limitingly matched with the first intermediate push rod limiting arm (160-2).

8. The fast tripping device according to claim 6, characterized in that: The second push rod (180) is a triangular plate-shaped structure, one of the top corners of which is provided with a push rod driven hole (180-2) for inserting the second intermediate shaft (170-2) and drivingly cooperating therewith, the second top corner is pivotally arranged via the second push rod shaft (4), and the third top corner is provided with a push rod driving finger (180-1) drivingly cooperating with the re-clamp (15).

9. The fast tripping device according to claim 8, characterized in that: The re-lock (15) comprises a re-lock actuated column (15-9) drivingly matched with a second push rod (180).

10. The fast tripping device according to claim 1, characterized in that: The operating mechanism (100) comprises a bracket (50), a rocker assembly, a lock catch (13), a trip catch (60) and a re-catch (15) which are respectively pivotally arranged on the bracket (50), a first crank (30) pivotally arranged on the trip catch (60) around a first axis (67m), a first spring (22), a slide rail (25), a slider (26) and a first connecting rod (27); the rocker assembly comprises a synchronously acting handle (41), a rocker arm (45) fixedly connected to the handle (41) and a reset structure (42) for driving the trip catch (60) and the lock catch (13) to re-catch; the rocker arm (45) is pivotally arranged on the bracket (50); the first crank (30) ) includes a crank limiting portion (31), and when the operating mechanism (100) is in a closed state or a tripped state, the crank limiting portion (31) and the tripping latch (60) are limited and matched; the slider (26) is arranged on the slide rail (25) and slides back and forth along its extension direction, one end of the first connecting rod (27) and one end of the first spring (22) are respectively connected to the first crank (30) in rotation around the second axis (16m), the other end of the first connecting rod (27) is connected to the slider (26) in rotation, and the other end of the first spring (22) is connected to the rocker arm assembly in rotation; when the operating mechanism (100) is in an open state or a tripped state, the slide rail (25) and the slider (26) are limited and matched to prevent it from sliding.

11. A circuit breaker, characterized in that: It comprises a rapid tripping device as claimed in any one of claims 1 to 10; the circuit breaker further comprises at least one breaking pole (300), each breaking pole (300) comprising a unit housing (120) and a moving contact mechanism arranged in the unit housing (120); a first intermediate shaft (161) of the rapid tripping device is inserted into the unit housing (120), and an inner end and an outer end of the first intermediate shaft (161) are respectively drive-connected to a first intermediate push rod (160) and a second intermediate push rod (170-1); and a second push rod (180) of the rapid tripping device is pivotally arranged outside the unit housing (120).

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