WO2024067301A1 - Mécanisme de déclenchement de disjoncteur et disjoncteur - Google Patents

Mécanisme de déclenchement de disjoncteur et disjoncteur Download PDF

Info

Publication number
WO2024067301A1
WO2024067301A1 PCT/CN2023/120109 CN2023120109W WO2024067301A1 WO 2024067301 A1 WO2024067301 A1 WO 2024067301A1 CN 2023120109 W CN2023120109 W CN 2023120109W WO 2024067301 A1 WO2024067301 A1 WO 2024067301A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit breaker
lock
buckle
tripping
lever arm
Prior art date
Application number
PCT/CN2023/120109
Other languages
English (en)
Chinese (zh)
Inventor
陈闽
贾永帅
张协利
周燕海
赖森林
孙冠上
Original Assignee
厦门宏发汽车电子有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202211200068.5A external-priority patent/CN115513014A/zh
Priority claimed from CN202211200055.8A external-priority patent/CN115472471A/zh
Application filed by 厦门宏发汽车电子有限公司 filed Critical 厦门宏发汽车电子有限公司
Publication of WO2024067301A1 publication Critical patent/WO2024067301A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/24—Electromagnetic mechanisms

Definitions

  • the present disclosure relates to the technical field of circuit breaker manufacturing, and in particular to an improvement of a tripping mechanism and a circuit breaker having the tripping mechanism.
  • the tripping mechanism is one of the common mechanisms in the circuit breaker. Its function is that when an abnormal situation occurs in the circuit and needs to be quickly disconnected, after the tripping mechanism is unhooked, the fast action of the tripping buckle drives the moving contact to quickly open the gate.
  • the existing tripping mechanism generally only includes a tripping buckle and a lock buckle. The tripping buckle and the moving contact are linked and overlapped with the lock buckle, so that the tripping buckle and the lock buckle are in a locked state.
  • the lock buckle cooperates with the tripping device. When the tripping device acts on the lock buckle, the lock buckle acts, so that the locked state of the tripping buckle and the lock buckle is released, causing the fast action of the tripping buckle.
  • the size of the tripping buckle is generally small (shorter), resulting in a shorter force arm for its force application.
  • the torque of the tripping buckle remains unchanged, the shorter the force arm, the greater the force of the tripping buckle on the lock buckle.
  • the locking force of the lock buckle to lock the tripping buckle is also relatively large, which leads to a greater unlocking force required to unlock the lock buckle.
  • the push rod of the commonly used release device in the related technology (such as electromagnetic release device) has a small thrust and push range, so the unlocking force required for the lock is too large, and the thrust of the release device may not be able to push the release mechanism to unlock.
  • a tripping mechanism of a circuit breaker with an optimized structure and a circuit breaker having the tripping mechanism are proposed.
  • a tripping mechanism for a circuit breaker comprises a rotatable tripping catch, a re-catch and a lock catch, wherein the re-catch is a labor-saving lever structure, comprising a first lever arm and a second lever arm, the tripping catch is provided with a first overlapping portion, and the first lever arm is correspondingly provided with a first crimping portion, the second lever arm is provided with a second overlapping portion, and the lock catch is correspondingly provided with a second crimping portion, the relative positions of the tripping catch, the re-catch and the lock catch are configured such that through relative rotation between each other, the second crimping portion can be press-fitted to the second overlapping portion while the first crimping portion is press-fitted to the first overlapping portion, thereby limiting the rotation of the tripping catch, wherein the first rotation force arm of the first crimping portion is smaller than the second rotation force arm of the second overlapping portion.
  • first lever arm and the second lever arm rotate together around the rotation axis of the re-clamp, and the first lever arm and the second lever arm protrude in the same direction, and the protrusion heights of the first lever arm and the second lever arm are different, or
  • the first lever arm and the second lever arm have an included angle, which is an acute angle, so that the two are in a V shape.
  • the rotation centers of the re-snap and the lock are respectively arranged on both sides of the rotation center of the jump snap, so that the second lever arm extends from one side of the rotation center of the jump snap to the other side.
  • the jump buckle is a swing arm structure
  • the first overlapping portion is arranged at the end of the jump buckle
  • the second overlapping portion is arranged at the end of the second lever arm.
  • the lock buckle is provided with a boss abutting against the end of the second lever arm, and the overlap amount of the second overlapping portion and the second crimping portion is controlled by changing the protruding height of the boss.
  • the disclosed embodiment also provides a circuit breaker, comprising an operating mechanism and a contact assembly consisting of a moving contact and a stationary contact, wherein the moving contact and the operating mechanism are linked together and have a movable stroke relative to the stationary contact for realizing the conduction or disconnection of the circuit breaker, and further comprising a tripping mechanism for realizing the tripping and opening of the circuit breaker and a tripper for triggering the tripping mechanism to trip, wherein the tripping mechanism is the tripping mechanism of the circuit breaker mentioned above, the tripper is linked together with the operating mechanism, and the tripper is transmission-connected to the lock.
  • the operating mechanism and the contact assembly are roughly arranged up and down, and the tripping mechanism of the circuit breaker is roughly arranged front-to-back, thereby forming a cross-shaped cross layout.
  • the re-buckle is hinged on the rear side of the jump buckle
  • the lock buckle is hinged on the front side of the jump buckle, so that the second lever arm extends from the rear to the front.
  • the circuit breaker also includes a moving contact support, the moving contact is mounted on the moving contact support and moves with the moving contact support, the re-catch is hinged on the rear side of the trip catch, and the lock catch is hinged on the oblique upper side of the front side of the trip catch so that the second lever arm extends obliquely upward, and the lock catch and the moving contact support form an upper and lower arrangement.
  • the operating mechanism includes a handle rotatably disposed above the re-hook, and also includes a disc-shaped connecting seat for mounting the handle, and the re-hook is an arc-shaped extension structure matching the shape of the disc-shaped connecting seat.
  • the first crimping portion and the second overlapping portion of the re-lock are staggered in the left-right direction
  • the jump buckle matched with the first crimping portion and the lock buckle matched with the second overlapping portion are also staggered in the left-right direction and are not in a plane in the left-right direction.
  • the operating mechanism includes a rotatable handle, and the handle has two parking positions of opening and closing respectively.
  • the handle is linked to the trip latch and the moving contact at the same time through a connecting rod mechanism.
  • the connecting rod mechanism transmits force to the trip latch so that when the handle swings from the opening position to the closing position, the first overlapping portion of the trip latch is pulled against the first crimping portion, and the second overlapping portion is indirectly pushed against the second crimping portion, thereby locking the trip mechanism.
  • the handle, re-latch and lock are respectively configured with a first elastic member, a second elastic member and a third elastic member.
  • the first elastic member is used to provide an elastic force for the handle to rotate in the direction of opening the switch, and indirectly provide an elastic force for the re-latch to return to its original position after being unfastened.
  • the second elastic member is used to provide an elastic force for the re-latch to return to its original position after being unfastened.
  • the third elastic member is used to provide an elastic force for the lock to return to its original position after being unfastened.
  • the second overlap portion is arranged above the rotation axis of the lock, and a clearance recess is arranged below the second crimping portion to provide travel space for the re-locking and resetting.
  • the circuit breaker further includes a first stop portion, which is fixedly disposed on a reset path of the tripping and re-tripping to limit the tripping and re-tripping.
  • the trip buckle can be reset before the re-buckle, and the re-buckle can be reset before the lock buckle.
  • one end of the re-fastening movement direction of the buckle is provided with a first limiting surface
  • the jump buckle is provided with a The limiting surface abuts against the first stop portion to prevent the re-buckle from resetting
  • a first abutment terminal end is provided on the first limiting surface along the resetting direction of the jump buckle, so that the first stop portion is separated from the first limiting surface after passing over the first abutment terminal end, thereby releasing the resetting stroke of the re-buckle, so that the jump buckle can be reset before the re-buckle.
  • a second limiting surface is provided at one end of the lock buckle's resetting movement direction, and the re-snap is provided with a second stop portion that can abut against the second limiting surface to prevent the lock buckle from resetting, and a second abutment terminal end is provided on the second limiting surface along the resetting direction of the re-snap, so that the second stop portion disengages from the second limiting surface after passing over the second abutment terminal end, thereby releasing the lock buckle's resetting stroke, so that the re-snap can be reset before the lock buckle.
  • a re-lock is added to the tripping mechanism, so that in the tripping mechanism, the lock is first locked and then locked, and then locked and jumped.
  • the re-lock is a labor-saving lever structure. The force applied to the lock by the jumper through the labor-saving lever structure is smaller, so the tripping force of the electromagnetic releaser required to unlock the lock is also reduced, ensuring that the contacts can be automatically disconnected when a leakage fault occurs.
  • a circuit breaker comprising a tripping mechanism for realizing tripping and opening, the tripping mechanism comprising a tripping catch, the circuit breaker further comprising an external accessory linkage mechanism, the external accessory linkage mechanism comprising a first linkage member and a second linkage member, the first linkage member and the tripping catch being coaxially connected and being able to be linked, the second linkage member being movably arranged on one side of the first linkage member and being able to be pushed by the first linkage member when the tripping catch is unfastened, the second linkage member being provided with a coupling connection portion, the coupling connection portion being used to be coupled and connected with an external accessory, so that one of the second linkage member and the external accessory can drive the other to produce an action through the cooperation of the coupling connection.
  • the trip mechanism also includes a lock for locking or unlocking the tripper
  • the circuit breaker also includes a third linkage, which is movably arranged on one side of the second linkage and can be pushed by the second linkage to produce a movement
  • the lock is provided with a toggle portion extending to the side of the third linkage away from the second linkage, so that when the second linkage pushes the third linkage, the toggle portion can be further toggled to unlock the lock on the tripper, so as to cause a trip.
  • the external accessory includes a coupling fitting portion coupled to the coupling connection portion, and the external accessory is a passively triggered accessory that triggers the coupling fitting portion by pushing the second linkage portion through the first linkage portion, or is an actively driven accessory that actively drives the second linkage portion through the coupling fitting portion.
  • one of the coupling connection portion and the coupling mating portion is a socket, and the other is a rod inserted into the socket.
  • the coupling connection portion is a socket
  • the coupling fitting portion is an insertion rod inserted into the socket
  • the hole diameter of the socket is larger than the rod diameter of the insertion rod
  • opposite sides of the second linkage member and the third linkage member are respectively provided with a first protruding portion and a second protruding portion that protrude toward each other.
  • the circuit breaker also includes a moving contact support for driving the moving contact
  • the third linkage is a swing arm structure
  • the first end of the third linkage can be rotatably connected to the moving contact support
  • the second end of the third linkage is pressed against a fixed contact point in a direction away from the toggle portion under the action of an elastic member.
  • the relative positions of the second linkage member, the third linkage member and the moving contact support member satisfy that when the switch is opened, the moving contact support member can drive the first end of the third linkage member to deflect in a direction away from the second linkage member to escape from the travel range of the second linkage member.
  • the second linkage member and the third linkage member are each provided with a first protrusion on opposite sides thereof that protrudes toward each other.
  • the first protruding portion and the second protruding portion have a pointed shape with a gradually contracted front end, so that when the moving contact support is opened, the second protruding portion can quickly escape from the travel range of the first protruding portion.
  • the circuit breaker further comprises an indicator for indicating the state of the circuit breaker, wherein the indicator is a lever structure with one end rotatably connected to the moving contact support, and the fixed contact point is a rotating shaft of the indicator.
  • the second linkage member is a rotatable swing arm
  • a limit column is fixedly provided on the side of the second linkage member toward the movement direction of the first linkage member to limit the extreme position of the second linkage member swinging toward the direction close to the first linkage member
  • the circuit breaker also includes a mounting base, the mounting base includes a first side plate and a second side plate that are relatively assembled and connected, the tripping mechanism is arranged between the first side plate and the second side plate, and the external accessory linkage mechanism is installed on the outer side of the first side plate, so that the external accessory linkage mechanism and the tripping mechanism are at different installation levels.
  • the present disclosure further provides a combined switching device, including the circuit breaker described in any of the above-mentioned embodiments and an external accessory coupled to the circuit breaker.
  • the present disclosure has the following beneficial effects: by setting an external accessory linkage mechanism, the circuit breaker can be modularly connected to external accessories, and a set of external accessory linkage mechanisms in the embodiment of the present disclosure can be equipped with a variety of different external accessories, which greatly improves the flexibility of installing external accessories on the circuit breaker.
  • FIG. 1 is an overall schematic diagram of a circuit breaker in some embodiments of the present disclosure.
  • FIG. 2 is a structural exploded view of a circuit breaker in some embodiments of the present disclosure.
  • FIG. 3 is a three-dimensional schematic diagram of a circuit breaker in some embodiments of the present disclosure (with the upper cover hidden).
  • FIG. 4 is a schematic diagram of a circuit breaker conductive system, operating mechanism and tripping mechanism in some embodiments of the present disclosure (closed state).
  • FIG. 5 is a structural exploded view of an operation linkage component in some embodiments of the present disclosure.
  • FIG. 6 is a perspective schematic diagram of a first side panel in some embodiments of the present disclosure.
  • FIG. 7 is a perspective schematic diagram of the second side panel in some embodiments of the present disclosure (angle one).
  • FIG. 8 is a perspective schematic diagram of a handle in some embodiments of the present disclosure.
  • FIG. 9 is a schematic diagram of a second connecting rod in some embodiments of the present disclosure.
  • FIG. 10 is a schematic diagram of a third connecting rod in some embodiments of the present disclosure.
  • FIG. 11 is a schematic diagram of a moving contact support in some embodiments of the present disclosure.
  • FIG. 12 is a three-dimensional schematic diagram of a jump button in some embodiments of the present disclosure.
  • FIG. 13 is a three-dimensional schematic diagram of a lock in some embodiments of the present disclosure (angle one).
  • FIG. 14 is a three-dimensional schematic diagram of a lock in some embodiments of the present disclosure (angle two).
  • FIG. 15 is a three-dimensional schematic diagram of buckling in some embodiments of the present disclosure.
  • FIG. 16 is a schematic diagram of the cooperation between re-fastening and locking in some embodiments of the present disclosure.
  • 17 is a schematic diagram of a circuit breaker conductive system, operating mechanism and tripping mechanism in some embodiments of the present disclosure (manual tripping state).
  • FIG. 18 is a schematic diagram of a circuit breaker conductive system, operating mechanism and tripping mechanism in some embodiments of the present disclosure (tripped and opened state).
  • FIG. 19 is a schematic diagram of the cooperation among the electromagnetic release, linkage and lock in some embodiments of the present disclosure.
  • FIG. 20 is a three-dimensional schematic diagram of a linkage member in some embodiments of the present disclosure.
  • Figure 21 is a three-dimensional schematic diagram of the second side panel in some embodiments of the present disclosure (angle two).
  • FIG. 22 is a schematic diagram of the cooperation between the first limiting surface of the re-fastening and the first stopping portion of the jump fastening in some embodiments of the present disclosure.
  • FIG. 23 is a schematic diagram of the cooperation between the second limiting surface of the lock and the second stop portion of the re-lock in some embodiments of the present disclosure.
  • Figure 24 is a schematic diagram of some embodiments of the present disclosure in which the first crimping portion, the jump buckle, the second overlapping portion, and the lock buckle are staggered in the left and right directions.
  • FIG. 25 is a schematic top view of a re-fastening in some embodiments of the present disclosure.
  • FIG. 26 is an overall schematic diagram of a circuit breaker in some embodiments of the present disclosure.
  • FIG. 27 is an exploded view of a circuit breaker in some embodiments of the present disclosure.
  • FIG. 28 is a three-dimensional schematic diagram of a circuit breaker in some embodiments of the present disclosure (with the upper cover hidden).
  • FIG. 29 is a schematic diagram of a conductive system, an operating mechanism, and a tripping mechanism in some embodiments of the present disclosure.
  • FIG. 30 is a structural exploded view of an operation linkage assembly in some embodiments of the present disclosure.
  • FIG. 31 is a schematic diagram of an external accessory linkage mechanism assembly on a circuit breaker in some embodiments of the present disclosure (closed state).
  • Figure 32 is a three-dimensional schematic diagram of the first side panel in some embodiments of the present disclosure.
  • FIG. 33 is a schematic diagram of a first linkage member in some embodiments of the present disclosure.
  • FIG. 34 is a schematic diagram of a second linkage member in some embodiments of the present disclosure.
  • FIG. 35 is a schematic diagram of a third linkage member in some embodiments of the present disclosure.
  • FIG. 36 is a schematic diagram of an indicator in some embodiments of the present disclosure.
  • FIG. 37 is a schematic diagram showing a coupling connection between an external accessory and a socket of a second linkage member through an insertion rod in some embodiments of the present disclosure.
  • FIG. 38 is a schematic diagram of a first linkage member pushing a second linkage member to trigger a passively triggered external accessory in some embodiments of the present disclosure.
  • 39 is a schematic diagram of actively driving an external accessory to push a second linkage member and then a third linkage member to trigger tripping and opening of the switch in some embodiments of the present disclosure.
  • FIG. 40 is a schematic diagram of an external accessory linkage mechanism assembly on a circuit breaker in some embodiments of the present disclosure (open state).
  • an embodiment of the present disclosure provides a circuit breaker, more specifically, a circuit breaker that operates according to residual current, including an outer shell 100 and a conductive system 3.
  • the outer shell 100 is a circuit breaker shell formed by assembling an upper cover 1001 and a base 1002 and fixing them together; the conductive system 3 is arranged inside the outer shell 100.
  • the conductive system 3 includes a contact assembly consisting of a moving contact 301 and a stationary contact 302, and also includes a wiring terminal 300 and a conductive copper busbar, etc.
  • the inner cavity of the outer shell 100 is also provided with a zero-sequence current transformer 1003 for measuring residual current, an arc-extinguishing grid 1004 for arc extinguishing, and an electromagnetic release 4 for realizing tripping and opening.
  • the outer shell 100 is also equipped with a test button 41 for realizing the leakage function detection of the circuit breaker.
  • the height direction of the circuit breaker i.e., the Z1 and Z2 directions in FIG. 2 are respectively the up and down directions;
  • the width direction of the circuit breaker i.e., the X1 and X2 directions in FIG. 2 are respectively the left and right directions;
  • the length direction of the circuit breaker i.e., the Y1 and Y2 directions in FIG. 2 are respectively the forward and backward directions.
  • the circuit breaker also includes an operating linkage assembly 2.
  • the operating linkage assembly 2 includes a first side plate 22 and a second side plate 23 that are opposite to each other in the left-right direction.
  • the first side plate 22 and the second side plate 23 are relatively assembled and connected to form a mounting base for the operating linkage assembly 2.
  • the operating linkage assembly 2 also includes a handle 11, a first connecting rod 13, a second connecting rod 14, a third connecting rod 15, a tripping catch 17, a re-catch 18, and a lock catch 20 that are arranged between the first side plate 22 and the second side plate 23.
  • the handle 11, the first connecting rod 13, the second connecting rod 14, and the third connecting rod 15 constitute an operating mechanism of the circuit breaker, which is used to control the opening and closing movement of the moving contact 301 by manually pulling the handle 11; the tripping catch 17, the re-catch 18, and the lock catch 20 constitute a tripping mechanism of the circuit breaker, which is used to cooperate with the electromagnetic release 4 to realize the tripping and opening of the circuit breaker.
  • the handle 11 is rotatably connected to the first side plate 22, referring to Figures 6 and 8.
  • the handle 11 is specifically rotatably plugged into the first socket 2201 of the first side plate 22 by its handle shaft 1101.
  • One end of the first connecting rod 13 is hinged to the handle 11, and the other end is hinged to the second connecting rod 14 and the third connecting rod 15 at the same hinge point.
  • the first connecting rod 13 is a U-shaped rod
  • one end of the second connecting rod 14 is provided with a second socket 1401, and the other end is provided with a third socket 1402
  • one end of the third connecting rod 15 is provided with a fourth socket 1501
  • the other end is provided with a fifth socket 1502
  • the second socket 1401 and the fourth socket 1501 are overlapped
  • one end of the first connecting rod 13 is rotatably plugged into the sixth socket 1103 on the handle 11, and the other end is rotatably plugged into the second socket 1401 and the fourth socket 1501 at the same time.
  • a moving contact support 16 is hinged to the third connecting rod 15. Specifically, referring to FIGS. 4, 10 and 11, the fifth jack 1502 of the third connecting rod 15 is hinged to the seventh jack 1601 of the moving contact support 16 through a pin. As shown in FIG. 11, the moving contact support 16 is also hinged to the outer shell 100 through the boss 1602 provided thereon.
  • the moving contact 301 is provided on the moving contact support 16 and moves with the movement of the moving contact support 16.
  • the moving contact 301 can be fixed or hinged to the moving contact support 16.
  • the moving contact 301 is hinged to the moving contact support 16.
  • One end of the moving contact 301 is limited at the limiting position of the moving contact shaft 16 by an elastic member. During the overtravel movement of the moving contact 30, when the other end of the moving contact 301 is limited by the static contact 302, one end of the moving contact 301 leaves the limiting position of the moving contact shaft 16 under the action of the elastic member.
  • the jump buckle 17 and the lock buckle 20 are rotatably connected to the first side plate 22, and the re-buckle 18 is rotatably connected to the second side plate 23.
  • the jump buckle 17 is hinged with its eighth insertion hole 1702 and the ninth insertion hole 2203 provided on the first side plate 22 through a pin;
  • the re-buckle 18 is rotatably plugged with its tenth insertion hole 1802 and the re-buckle shaft 2301 provided on the second side plate 23, and the lock buckle 20 is rotatably plugged with its lock buckle shaft 2002 provided in the eleventh insertion hole 2204 provided on the first side plate 22.
  • the jumper 17 is further provided with a twelfth insertion hole 1701 in the middle section of its length.
  • the third insertion hole 1402 of the second connecting rod 14 is hinged to the twelfth insertion hole 1701 through a pin.
  • some of the components of the above-mentioned operating linkage assembly 2 are rotatably connected to the first side plate 22 (such as the jump buckle 17), and some are rotatably connected to the second side plate 23 (such as the re-buckle 18), but it is obvious that in other embodiments, these components can be arbitrarily changed to be rotatably connected to the first side plate 22 and/or the second side plate 23, and there is no technical obstacle for those skilled in the art.
  • the first side plate 22 and the second side plate 23 are only a specific embodiment. In other embodiments, it is sufficient to provide a mounting base so that these components (such as the jump buckle 17 and the re-buckle 18, etc.) can be rotatably set on the mounting base.
  • This mounting base is not necessarily It must be the first side plate 22 and the second side plate 23 of the specific structure of this embodiment, and it can also be a mounting plate fixedly arranged in the outer shell 100, or even the inner wall of the outer shell 100.
  • the handle 11 and the tripping mechanism i.e., the tripping catch 17, the re-catch 18 and the lock catch 20
  • the handle 11 and the tripping mechanism are all rotatably arranged; one end of the first connecting rod 13 is hinged to the handle 11, and the other end is hinged to the second connecting rod 14 and the third connecting rod 15 at the same hinge point; the second connecting rod 14 is also hinged to the tripping catch 17; the third connecting rod 15 is also hinged to the moving contact support 16; the moving contact 301 is arranged on the moving contact support 16, and moves with the movement of the moving contact support 16.
  • the jumper 17 is provided with a first lap joint 1703, and correspondingly, the re-lock 18 is provided with a first crimping portion 1801; the re-lock 18 is also provided with a second lap joint 1803, and correspondingly, the lock 20 is provided with a second crimping portion 2001.
  • the relative positions of the jumper 17, the re-lock 18 and the lock 20 are configured such that, through relative rotation between each other, the second crimping portion 2001 can be pressed and fitted with the second lap joint 1803, while the first crimping portion 1801 can be pressed and fitted with the first lap joint 1703, thereby limiting the rotation of the jumper 17.
  • the lock buckle 20 is pressed downwardly on the second lap portion 1803 of the re-lock 18 with its second crimping portion 2001, and at the same time, the re-lock 18 is pressed downwardly on the first lap portion 1703 of the jump buckle 17 with its first crimping portion 1801. That is, at this time, the jump buckle 17 is limited and locked so that it cannot swing upward.
  • the handle 11 is provided with a first elastic member 1006 (i.e., a handle spring). It is understood that when the lock catch 20 is locked and the circuit breaker is switched from the manual opening state ( FIG17 ) to the manual closing state ( FIG4 ) by the swing of the handle 11 , the handle spring stores energy, and the handle 11 gives the tripping catch 17 an upward swinging force (pulling force) through the first connecting rod 13 and the second connecting rod 14 .
  • a first elastic member 1006 i.e., a handle spring
  • the tripping catch 17 cannot swing upward, that is, in the closing state, the tripping catch 17 is in a locked state with a force balance with the re-clip 18 and the lock catch 20 . Since the tripping catch 17 is locked (the tripping catch 17 will not rotate), when the circuit breaker is manually opened or closed, the second connecting rod 14 will rotate with the hinge point A between it and the tripping catch 17 as a fulcrum, thereby driving the third connecting rod 15 , the moving contact support 16 and the moving contact 301 to move. When the lock catch 20 is unlocked, this force balance state will be broken, thereby causing the tripping and opening.
  • FIG4 when the lock catch 20 is driven by the electromagnetic release 4 and the second crimping part 2001 is separated from the second lap part 1803 of the re-clip 18 (the second crimping part 2001 rotates clockwise in the specific view state of FIG4 ), the trip catch 17 will push the re-clip 18 upward to swing upward until the first crimping part 1801 of the re-clip 18 cannot suppress the first lap part 1703 of the trip catch 17, then the trip catch 17 is unlocked (unfastened), and the trip catch 17 quickly swings clockwise (in the specific view state of FIG4 , the trip catch 17 rotates around the hinge point B between the trip catch 17 and the mounting base), driving the second connecting rod 14 to rotate with the hinge point B between the trip catch 17 and the mounting base as the rotation axis, and then driving the moving contact 301 to trip and open the gate, and quickly realize the disconnection work.
  • FIG18 shows the approximate state of the tripping mechanism at the moment of tripping in the tripping and opening stage (the final state is also affected by
  • the lock 20 can act directly on the tripping latch 17, that is, the tripping latch 17 is locked by the lock 20 alone.
  • the lock 20 is hinged at the rear side of the tripping latch 17 (that is, roughly hinged at the hinge position of the re-clip 18 in this embodiment). Due to the limitation of the internal space of the circuit breaker, the size of the tripping latch 17 is generally small (shorter), resulting in a shorter force arm for its force application.
  • the torque of the tripping latch 17 remains unchanged, the shorter the force arm, the greater the force of the tripping latch 17 acting on the lock 20.
  • the locking force of the lock 20 to lock the tripping latch 17 is also relatively large, which leads to a greater unlocking force required to unlock the lock 20.
  • the thrust and pushing range of commonly used electromagnetic releases are relatively small, the unlocking force required for the lock 20 is too large, and the thrust of the electromagnetic release 4 may not be able to push the product to unlock.
  • a re-buckle 18 is added, and the lock buckle 20 first locks the re-buckle 18, and the re-buckle 18 then locks the jump buckle 17.
  • the jump buckle 17 first applies force to the re-buckle 18, and the re-buckle 18 then applies force to the lock buckle 20.
  • the re-lock 18 is a force-saving lever structure, as shown in Figure 15, the re-lock 18 includes a first lever arm 181 and a second lever arm 182, wherein the first crimping portion 1801 is arranged on the first lever arm 181, and the second lap portion 1803 is arranged on the second lever arm 182, and the first turning force arm L1 of the first crimping portion 1801 is smaller than the second turning force arm L2 of the second lap portion 1803, as shown in Figure 4, wherein the first turning force arm L1 is the distance between the point of application of the force of the first lap portion 1703 of the jump lock 17 applied to the first crimping portion 1801 of the first lever arm 181 of the re-lock 18 and the center point of the re-lock shaft 2301, and the second turning force arm L2 is the distance between the point of application of the force of the second crimping portion 2001 of the lock buckle 20 applied to the second lap portion 1803 of the second lever wall 182 of the re-lock and the center point of the
  • the jumper 17 is a swing arm structure, as shown in FIG. 12 and FIG. 15 , in this embodiment, the first overlap portion 1703 and the second overlap portion 1803 are overlap surfaces (or overlap edges) respectively arranged at the ends of the jumper 17 and the second lever arm 182. Once the first overlap portion 1703 and the second overlap portion 1803 are unhooked, the jumper 17 can be quickly unhooked and jumped up, thereby improving the unhooking response speed.
  • the first crimping portion 1801 and the second crimping portion 2001 are corner structures formed by the intersection of two planes. Specifically, as shown in FIG. 15 , the two planes of the first crimping portion 1801 are respectively the first plane 18011 and the second plane 18012. As shown in FIG.
  • the two planes of the second crimping portion 2001 are respectively the third plane 20011 and the fourth plane 20012. Therefore, when the lock buckle 20 rotates a certain angle, once the second overlap portion 1803 slides out of the corner-shaped second crimping portion 2001, it can be quickly separated from the second crimping portion 2001. When the lock buckle 18 rotates a certain angle, once the first overlap portion 1703 slides out of the corner-shaped first crimping portion 1801, it can be quickly separated from the first crimping portion 1801.
  • the slope of the first plane 18011 located above the two planes of the first crimping portion 1801 is larger, so that when the jump buckle 17 is unfastened and reset, the first plane 18011 with a larger slope can serve as a guide surface to guide the jump buckle 17 to reset reliably.
  • the same principle design is also adopted for the two planes constituting the second crimping portion 2001.
  • the first length d1 of the first lever arm 181 is smaller than the second length d2 of the second lever arm 182, and the second lap joint 1803 is arranged at the end of the second lever arm 182, so that the first turning force arm L1 of the first crimping portion 1801 is smaller than the second turning force arm L2 of the second lap joint 1803 (as shown in Figure 4).
  • the first lever arm 181 and the second lever arm 182 rotate together around the rotation axis R1 of the re-lock 18, and the first lever arm 181 and the second lever arm 182 protrude in the same direction (for example, the direction indicated by the solid arrow shown in FIG.
  • the protrusion heights of the first lever arm 181 and the second lever arm 182 are different.
  • Such a configuration can minimize the occupied space and length of the re-lock 18, save installation space, and avoid interference with other components inside the circuit breaker.
  • the jump buckle 17 matched with the first crimping portion 1801 and the lock buckle 20 matched with the second lap portion 1803 are staggered in the left and right directions (refer to FIG. 24, that is, in the directions of X1 and X2), thereby utilizing the space in the left and right directions of the circuit breaker to avoid the movement of the jump buckle 17 and the lock buckle 20.
  • the first lever arm 181 and the second lever arm 182 can have a small acute angle ⁇ between them, and the two are in a "V" shape, as shown in FIG. 25. Although such a setting can effectively reduce the space occupied by the re-clamp 18, it is still possible to interfere with the components below the re-clamp 18, such as the contact assembly, the arc extinguishing grid, etc.
  • the first lever arm 181 and the second lever arm 182 in other embodiments can also be two colinear lever arms extending in different directions (that is, the first lever arm 181 and the second lever arm 182 are located on both sides of the rotation axis R1 and the two are colinear), or at an obtuse angle.
  • the operating mechanism and the contact assembly are generally arranged up and down, and the tripping mechanism is generally arranged front to back, thereby forming a "cross"
  • the cross-shaped layout makes full use of the length and height space of the circuit breaker.
  • the restraining end of the re-lock 18 in this embodiment is hinged on the second side plate 23 on the rear side of the jump lock 17, and the lock 20 is hinged on the first side plate 22 on the front side of the jump lock 17.
  • the re-lock 18 extends from the restraining end to the free end from the back to the front, so as to make full use of the length space of the circuit breaker in the front and rear directions, so that the second turning force arm L2 of the second overlap portion 1803 is larger. Furthermore, in the present embodiment, the restraining end of the re-lock 18 is hinged on the second side plate 23 directly behind the jump buckle 17, and the lock buckle 20 is hinged on the first side plate 22 obliquely above the front side of the jump buckle 17. Therefore, the re-lock 18 still extends obliquely. Such a configuration further increases the second rotating force arm L2 of the second lap joint 1803.
  • hingedly connecting the lock buckle 20 to the first side plate 22 obliquely above the front side of the jump buckle 17 can also avoid interference between the lock buckle 20 and the moving contact support 16 during operation.
  • the lock buckle 20 and the moving contact support 16 are arranged one above the other, thereby improving the compactness of the structure.
  • the handle 11 and the buckle 18 are rotatably connected to the mounting base, and a disc-shaped connecting seat 2309 for mounting the handle 11 is provided on the mounting base.
  • the buckle 18 is a swing arm structure with an arc-shaped extension that matches the disc-shaped connecting seat 2309, so as to make way for the disc-shaped connecting seat 2309. Such an arrangement can improve the compactness of the internal structure of the circuit breaker.
  • a boss 2006 is fixedly provided on the lock buckle 20, and the boss 2006 is used to abut against the free end (i.e., the end) of the re-snap 18, so as to control the overlap amount between the second overlap portion 1803 and the second crimping portion 2001. It can be understood that the larger the overlap amount, the larger the disengagement stroke required for the lock buckle 20 to disengage from the re-snap 18. Therefore, this embodiment can control the disengagement stroke of the lock buckle 20 by changing the protruding height of the boss 2006, which is convenient for adjustment to suit actual product specifications.
  • the electromagnetic release 4 drives the lock 20 to unlock through a linkage 24.
  • the electromagnetic release 4 and the linkage 24 are both arranged on the side of the second side plate 23 away from the release mechanism.
  • the linkage 24 is a seesaw structure.
  • the linkage 24 can be rotatably plugged into the rotating shaft 2303 of the second side plate 23 through the thirteenth plug hole 2401 provided thereon.
  • the linkage 24 is provided with a first toggle portion 2403 and a second toggle portion 2402 extending radially outward, wherein the first toggle portion 2403 is arranged close to the push rod (not shown in the figure) of the electromagnetic release 4.
  • the lock buckle 20 is provided with a boss 2005, which extends through the second side plate 23 to the vicinity of the second toggle portion 2402.
  • the push rod of the electromagnetic release 4 When the push rod of the electromagnetic release 4 is actuated, it pushes the first toggle portion 2403 to cause the linkage member 24 to rotate, and then the second toggle portion 2402 pushes the boss 2005 to cause the lock buckle 20 to rotate and unlock.
  • the linkage member 24 is also provided with a reset member, which is used to reset the linkage member 24 and the push rod of the electromagnetic release 4 after the circuit breaker is tripped and opened.
  • the reset member is a torsion spring 25, which is installed on the linkage member 24.
  • the first arm of the torsion spring 25 abuts against the first abutting surface 2404 provided on the linkage member 24, and the second arm is close to the movable contact support member 16 (specifically, close to the second abutting surface 1603 provided on the movable contact support member, as shown in FIG11 ).
  • the electromagnetic release 4 can also be other types of releasers in other embodiments, such as an overheat releaser and an undervoltage releaser.
  • the handle 11 , the buckle 18 and the lock buckle 20 are respectively configured with a first elastic member 1006 , a second elastic member 1007 and a third elastic member 1008 .
  • One end of the first elastic member 1006 acts on the mounting base (for example, in the present embodiment, it acts on the first side plate 22 or the second side plate 23), and the other end acts on the handle 11 to provide an elastic force for the handle 11 to rotate in the direction of opening the switch;
  • one end of the second elastic member 1007 acts on the mounting base, and the other end acts on the re-buckle 18 to provide an elastic force for the re-buckle 18, and the elastic force is to rotate the re-buckle 18 toward the locking position of the press-buckle locking the jump buckle 17, thereby resetting the re-buckle 18 after the tripping mechanism is unbuttoned and the press-buckle locking of the re-buckle 18 and the jump buckle 17 is released;
  • one end of the third elastic member 1008 acts on the mounting base, and the other end acts on the mounting
  • the first elastic member 1006 provides an elastic force to rotate the handle clockwise
  • the second elastic member 1007 provides an elastic force to rotate the re-buckle 18 clockwise
  • the third elastic member 1008 provides an elastic force to rotate the lock catch 20 counterclockwise (the direction of rotation is indicated by an arrow in Figure 18).
  • the handle 11 rotates to the opening position, and the trip buckle 17 is driven by the force transmission of the first connecting rod 13 and the second connecting rod 14 to swing downward and reset, and then, under the action of the second elastic member 1007 and the third elastic member 1008, the re-buckle 18 and the lock catch 20 are reset respectively.
  • the free end of the re-snap 18 is arranged above the rotation axis of the lock 20 (the axis of the lock shaft 2002), and because the lock 20 is on the reset path of the re-snap 18, a clearance recess 2007 (as shown in FIG.
  • a first stop portion 2306 is arranged below the jumper 17 and the re-snap 18. When the jumper 17 and the re-snap 18 swing downward to reset, they contact the first stop portion 2306 and are limited to a suitable minimum limit position, so as to prevent the two from swinging downward too much and failing to return to the state of press-fitting.
  • the first stop portion 2306 is the bottom wall of the second side plate 23, and in other embodiments, it can also be an additional stop member, such as an independently arranged baffle.
  • the tripping catch 17 will be tilted upward under the transmission action of the handle 11 and abut against the re-catch 18 to form a press-fit fit, and push the re-catch 18 to swing upward and abut against the lock catch 20 to form a press-fit fit, thereby completing a complete resetting action of the tripping mechanism.
  • a second gear portion 2307 is provided above the re-lock 18 (in this embodiment, the second gear portion 2307 is the top wall of the second side plate 23, and in other embodiments, it can also be other gear members) to control the maximum limit position of the upward swing of the re-lock 18 to ensure that the re-lock 18 can be reliably reset.
  • the first elastic member 1006, the second elastic member 1007 and the third elastic member 1008 are all torsion springs. In other embodiments, they can also be other elastic members such as tension springs and compression springs. Only the installation and connection parts need to be adaptively changed to provide potential energy with the same movement effect.
  • the reset of the jump buckle 17, the re-buckle 18 and the lock buckle 20 needs to follow a certain order. It is understandable that if the lock buckle 20 is reset before the re-buckle 18, it will form a stop for the reset of the re-buckle 18; if the re-buckle 18 is reset before the jump buckle 17, it will form a stop for the reset of the jump buckle 17. Therefore, the three need to be reset in the order of "jump buckle 17, re-buckle 18, lock buckle 20".
  • one end of the resetting movement direction of the re-buckle 18 (in this embodiment, the lower end of the re-buckle 18) is provided with a first limiting surface 1806, and the jump buckle 17 is provided with a first stop portion 1705 that can abut against the first limiting surface 1806 to prevent the re-buckle 18 from resetting.
  • the first stop portion 1705 is a convex shaft extending from the jump buckle 17, and the first limiting surface 1806 is a curved surface that matches the movement trajectory of the first stop portion 1705.
  • a first abutment termination end 18061 is provided on the first limiting surface 1806 along the resetting direction of the jump buckle 17, and the first stop portion 1705 passes over it.
  • the first abutment terminal end 18061 is then disengaged from the first limiting surface 1806, thereby further resetting the buckle 18; similarly, a second limiting surface 2008 is provided at one end in the direction of the resetting movement of the lock buckle 20, and the free end of the re-lock 18 serves as a second stop portion that abuts against the second limiting surface 2008 to prevent the lock buckle 20 from resetting.
  • the second limiting surface 2008 is a curved surface that matches the movement trajectory of the second stop portion, and a second abutment terminal end 20081 is provided on the second limiting surface 2008 along the resetting direction of the re-lock 18.
  • the second stop portion passes over the second abutment terminal end 20081 and is disengaged from the second limiting surface 2008, thereby further resetting the lock buckle 20.
  • the circuit breaker also includes a testing mechanism, as shown in FIG19 , which includes a testing button 41, a first testing spring 42, a second testing spring 43, a moving contact spring 44, a shielding cover 45 (a charged body), a connecting spring 46, and a resistor 47.
  • the testing button 41 is mounted on the outer shell 100 and can only move up and down within a certain range.
  • the first testing spring 42 is a torsion spring mounted on the second side plate 23. One torsion arm is overlapped on the test button 41, and the other torsion arm is overlapped on the shielding cover 45.
  • the second test spring 43 is also a torsion spring installed on the second side plate 23, and its two torsion arms are overlapped at different positions on the second side plate 23.
  • the moving contact spring 44 is a torsion spring installed on the moving contact support 16, and one torsion arm is overlapped on the moving contact 301, and the other torsion arm is overlapped on the moving contact support 16 and is located near a torsion arm of the second test spring 43.
  • the moving contact spring 44 moves with the moving contact support 16.
  • the shielding cover 45 is sleeved on the electromagnetic release 4 and installed on the second side plate 23.
  • the connecting spring 46 is installed on the second side plate 23, and one torsion arm is overlapped on the shielding cover 45, and the other torsion arm presses the pin of the resistor 47 onto the shielding cover 45.
  • the resistor 47 is installed between the first side plate 22 and the second side plate 23, and the other pin of the resistor 47 is fixedly connected to the input terminal board.
  • the moving contact spring 44 is in contact with the second test spring 43.
  • pressing the test button 41 can turn on the test circuit and disconnect the circuit breaker; when the circuit breaker is in the disconnected position, the moving contact spring 44 and the second test spring 43 are not electrically connected, and pressing the test button 41 cannot turn on the test circuit, which can protect the circuit from damage.
  • test circuits of this embodiment are all connected by springs, and signal lines are not soldered, which reduces the risk of broken wires and cold soldering; the functions of the parts in the test circuit are integrated: the shielding cover is used to shield the influence of the external magnetic field on the electromagnetic release, and is also used as a conductor in the test circuit.
  • the moving contact spring is used to generate contact pressure and is also used as a conductor in the test circuit, saving the number of parts.
  • circuit breakers with tripping and opening functions a single tripping and opening function is increasingly unable to meet current needs.
  • an alarm device is usually required for the circuit breaker; if the circuit breaker needs to have multiple tripping modes at the same time, other types of trips are required in addition to the trips that come with the circuit breaker.
  • the circuit breaker body in addition to the functions of the circuit breaker body, it is increasingly urgent to have the ability to be modularly improved.
  • the internal installation space of the circuit breaker body is limited, and based on the design concept of miniaturization, there is usually no space left for the installation of other modules. Therefore, circuit breakers that can flexibly connect accessories have become a direction of current circuit breaker structure research.
  • the circuit breakers that can be connected to accessories on the market often have the disadvantages of complex structure, low flexibility, and poor versatility.
  • some embodiments of the present disclosure further provide a circuit breaker, more specifically, a circuit breaker that operates according to residual current, including an outer shell 100a and a conductive system 3a, wherein the outer shell 100a is a circuit breaker shell formed by assembling and fixing an upper cover 1001a and a base 1002a; the conductive system 3a is arranged inside the outer shell 100a, referring to Figure 29, the conductive system 3a includes a wiring terminal 300a, a moving contact 301a, a stationary contact 302a and a conductive copper bus, etc., to form a conductive circuit of the circuit breaker after power is turned on, wherein the moving contact 301a has a movable stroke relative to the stationary contact 302a to realize the contact or separation of the moving contact 301a and the stationary contact 302a, thereby realizing the opening and closing of the circuit breaker.
  • the inner cavity of the outer shell 100a is also provided with a zero-sequence current transformer 1003a for residual current measurement, an arc extinguishing grid 1004a for arc extinguishing treatment, and an electromagnetic release 4a for tripping and opening the circuit breaker.
  • a test button 1005a for realizing leakage function detection of the circuit breaker is also installed on the outer shell 100a.
  • the circuit breaker also includes an operation linkage assembly 2a, referring to Figures 29 and 30, the operation linkage assembly 2a includes a first side plate 22a and a second side plate 23a opposite to each other in the left and right directions, the first side plate 22a and the second side plate 23a are relatively assembled and connected to form a mounting base of the operation linkage assembly 2a, and the operation linkage assembly 2a also includes an operating mechanism, a tripping mechanism and an external accessory linkage mechanism installed on the mounting base, wherein the operating mechanism includes a handle 11a, a first connecting rod 13a, a second connecting rod 14a and a third connecting rod 15a; the tripping mechanism includes a tripping buckle 17a, a re-buckle 18a and a lock buckle 20a; the external accessory linkage mechanism includes a first linkage member 26a, a second linkage member 27a and a third linkage member 29a.
  • the operating mechanism includes a handle 11a, a first connecting rod 13a, a second connecting rod 14a and a
  • the operating mechanism is used to control the opening and closing movement of the moving contact 301a; the tripping mechanism is connected to the operating mechanism and can be linked with the operating mechanism to cooperate with the electromagnetic release 4a to realize the tripping and opening of the circuit breaker.
  • the external accessory linkage mechanism is used for the linkage between the circuit breaker and external accessories (including actively triggered accessories and passively driven accessories).
  • the handle 11a, the jump buckle 17a, the re-buckle 18a and the lock buckle 20a are all rotatably arranged on the mounting base; one end of the first connecting rod 13a is hinged to the handle 11a, and the other end is hinged to the second connecting rod 14a and the third connecting rod 15a at the same hinge point; the second connecting rod 14a It is also hinged on the jumper 17a; the third connecting rod 15a is also hinged on the moving contact support 16a; the moving contact support 16a is also hinged on the outer shell 100a, and the moving contact 301a is arranged on the moving contact support 16a, and moves with the movement of the moving contact support 16a, for example, the moving contact 301a can be fixed or hinged on the moving contact support 16a.
  • the moving contact 301a is hinged on the moving contact support 16a, and one end of the moving contact 301 is limited to the limit position of the moving contact shaft 16 by an elastic member.
  • one end of the moving contact 301 leaves the limit position of the moving contact shaft 16 under the action of the elastic member.
  • the lock buckle 20a is pressed and matched with the re-buckle 18a, and the re-buckle 18a is pressed and matched with the jump buckle 17a to limit the rotation of the jump buckle 17a.
  • the jump buckle 17a is in a locked state with a force balance with the re-buckle 18a and the lock buckle 20a. Since the jump buckle 17a is locked, when the switch is manually opened and closed, the second connecting rod 14a will rotate with the hinge point A between it and the jump buckle 17a as a fulcrum, thereby driving the third connecting rod 15a, the moving contact support 16a and the moving contact 301a to move, and the jump buckle 17a will not rotate.
  • the jumper 17a first applies force to the re-lock 18a, and the re-lock 18a then applies force to the locker 20a. Therefore, the force arm of the jumper 17a exerting force on the locker 20a is indirectly lengthened by the re-lock 18a. Under the premise that the torque of the jumper 17a remains unchanged, the force of the jumper 17a acting on the locker 20a is smaller, and the tripping force of the electromagnetic release 4a required to unlock the locker 20a is also reduced, ensuring that the contacts can be automatically disconnected when a leakage fault occurs.
  • the operating mechanism and the tripping mechanism are both arranged between the first side plate 22a and the second side plate 23a, and the external accessory linkage mechanism is installed on the outer side of the first side plate 22a, so that the external accessory linkage mechanism and the operating mechanism and the tripping mechanism are at different installation levels, thereby improving the utilization rate of the internal space of the circuit breaker and the compactness of the structure.
  • the first side plate 22a separates the external accessory linkage mechanism, so that the external accessory linkage mechanism with more independent functions can interfere less with the operating mechanism and the tripping mechanism.
  • the first linkage member 26a is rotatably arranged on the mounting base and is coaxially linked with the jumper 17a.
  • the first linkage member 26a is a semicircular plate-shaped member, and the first linkage member 26a is hinged on the rotating shaft 2206a provided on the first side plate 22a with its central hole 2601a, and the rotating shaft 2206a is coaxial with the turning point B of the jumper 17a; the first linkage member 26a is also provided with a connecting hole 2602a, and an interlocking shaft passes through the connecting hole 2602a and is inserted into the jumper 17a, so that the jumper 17a and the first linkage member 26a are synchronized through the interlocking shaft.
  • connection methods can also be used to connect the jumper 17a and the first linkage member 26a, for example, the two are fixedly connected to the same rotating shaft.
  • the first linkage member 26a is used to move the second linkage member 27a when the jumper 17a is unfastened, so in other embodiments, the first linkage member 26a can also be a swing arm.
  • the second linkage member 27a is a swing arm rotatably connected to the mounting base, and its rotation center is point C. Specifically, the second linkage member 27a is hinged to the hole 2207a of the first side plate 22a with its rotation axis 2701a, and the free end of the second linkage member 27a is arranged close to the first linkage member 26a and can accept the movement of the first linkage member 26a.
  • One end of the first elastic member 28a acts on the mounting base, and the other end acts on the second linkage member 27a to provide a reset elastic force for the second linkage member 27a to swing toward the direction close to the first linkage member 26a.
  • the first elastic member 28a is a torsion spring.
  • a limit column 33a is fixedly provided on the side of the second linkage member 27a that is close to the movement direction of the first linkage member 26a to limit the extreme position of the second linkage member 27a swinging toward the direction close to the first linkage member 26a.
  • the second linkage member 27a can also be set as an up and down direct-acting structure.
  • the indicator 31a is a lever structure, and a rotating shaft 3101a is provided at the middle of its length, which can be rotatably connected to the hole 2209a of the first side plate 22a.
  • One end of the indicator 31a is hinged to the moving contact support 16a through a U-shaped slot 3102a.
  • the other end of the indicator 31a is driven to deflect to a different position to indicate the state of the circuit breaker.
  • the third linkage 29a is also a swing arm structure, and the first end of the third linkage 29a is hinged to the moving contact support 16a.
  • the first end of the third linkage 29a is provided with a hole 2901a, and the hole 2901a is rotatably connected to a protrusion (not shown) provided on the rotating shaft 16a.
  • the third linkage 29a is provided on one side of the second linkage 27a, and can be pushed by the second linkage 27a to generate an action.
  • the lock buckle 20a is provided with a toggle portion 201a that passes through the second side plate 22a and protrudes to the side of the third linkage 29a away from the second linkage 27a.
  • the second linkage member 27a is provided with a coupling connection portion for coupling and connecting an external accessory.
  • This external accessory refers to a component that is provided outside the circuit breaker body and can produce a joint reaction with the circuit breaker.
  • a passive trigger type accessory such as an auxiliary contact device, an alarm contact device, etc.
  • an active driving type accessory such as an undervoltage release, an overvoltage release, a shunt release, etc.
  • This external accessory is provided with a coupling matching portion, which is coupled and connected with the coupling connection portion of the second linkage member 27a, so that one of the second linkage member 27a and the external accessory can drive the other to produce an action through the cooperation of the coupling matching portion and the coupling connection portion.
  • the coupling connection portion is a socket 2705a provided on the second linkage member 27a
  • the coupling matching portion is a plug 600a inserted into the socket 2705a.
  • the coupling matching portion can also be a socket
  • the coupling connection portion can be a plug inserted into the socket.
  • the hole diameter of the socket 2705a is larger than the rod diameter of the plug rod 600a, so that the socket 2705a can be adapted to plug rods of more sizes and specifications, thereby improving applicability.
  • the external accessory 500a is a passively triggered accessory, such as an alarm contact device
  • the first linkage member 26a moves with the trip 17a, and further pushes the second linkage member 27a to swing.
  • the second linkage member 27a pushes the plug rod 600a to move through the plug-in cooperation of the socket 2705a and the plug rod 600a, thereby triggering the contact closure of the alarm contact device to generate an alarm signal.
  • the external accessory 500a is an actively driven accessory, such as an undervoltage release
  • the plug rod 600a actively moves, and the plug-in cooperation between the plug hole 2705a and the plug rod 600a pushes the second linkage member 27a to move, and the second linkage member 27a further pushes the third linkage member 29a, and the third linkage member 29a toggles the toggle portion 201a of the lock 20a to trip the circuit breaker body.
  • This embodiment sets an external accessory linkage mechanism, so that the circuit breaker can be modularly connected to external accessories, and a set of external accessory linkage mechanisms in this embodiment can be equipped with a variety of different external accessories, which greatly improves the flexibility of installing external accessories on the circuit breaker.
  • a first protruding portion 2704a and a second protruding portion 2904a that protrude toward each other are respectively provided on opposite sides of the second linkage member 27a and the third linkage member 29a.
  • the coupling connection portion and the coupling matching portion may also adopt other coupling connection structures, such as magnetic connection, hinged connection, and detachable fixed connection.
  • the second end 2902a of the third linkage member 29a abuts against the rotating shaft 3101a of the indicator member 31a in a direction away from the toggle portion 201a under the action of the second elastic member 30a, so as to prevent the third linkage member 29a from accidentally touching the lock buckle 20a.
  • the second end 2902a of the third linkage member 29a may not abut against the rotating shaft 3101a, as long as a fixed contact point is provided for the second end of the third linkage member 29a to abut against, for example, the fixed contact point may be extended and protruded from the second side plate 22a.
  • the first end of the third linkage member 29a is hinged to the moving contact support member 16a.
  • the second end 2902a of the third linkage member 29a abuts against the fixed contact point, as shown in Figure 40, in this embodiment, when the moving contact support member 16a rotates to the opening position, it can drive the first end of the third linkage member 29a to deflect in a direction away from the second linkage member 27a to escape from the travel range of the second linkage member 27a.
  • the second linkage member 27a cannot contact the third linkage member 29a no matter how it moves, so as to ensure that the circuit breaker can be closed smoothly (in production During the closing process of the product, if the plug rod 600a of the external accessory is stationary, the second linkage member 27a is stationary at the limit column 33a, and the third linkage member 29a moves with the moving contact support 16a to a position close to the second linkage member 27a.
  • the plug rod 600a pushes the second linkage member 27a, and then the second linkage member 27a pushes the third linkage member 29a to push the lock to unlock, and the product is actuated to open the circuit; if the plug rod 600a of the external accessory moves with the closing of the accessory, the second linkage member 27a will follow the plug rod 600a to the limit column 33a. During this process, the third linkage member 28a will also move with the moving contact support 16a, and always maintain a certain gap with the second linkage member 27a to ensure the smooth closing of the circuit breaker and the accessory).
  • the first protrusion 2704a and the second protrusion 2904a both have a pointed shape with a contracted front end, so that when the third linkage member 29a deflects in a direction away from the second linkage member 27a to cause a change in angle, the first protrusion 2704a and the second protrusion 2904a can be quickly offset, and the second protrusion 2904a can be more quickly out of the travel range of the first protrusion 2704a, and the two can be prevented from contacting each other again.
  • the first elastic member 28a and the second elastic member 30a are torsion springs in the present embodiment, but in other embodiments they may be tension springs, compression springs or other elastic members, but the installation method needs to be adaptively changed to ensure potential energy with the same motion effect.
  • the disclosed embodiment also provides a combined switch electrical appliance, including the circuit breaker described in the above embodiment, and external accessories coupled to the circuit breaker. Since the present embodiment adopts the circuit breaker in the above embodiment, it has the same technical effect as the circuit breaker in the above embodiment.
  • the coupled external accessories include but are not limited to: auxiliary contact device, alarm contact device, undervoltage release, overvoltage release, shunt release.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)

Abstract

L'invention concerne un mécanisme de déclenchement d'un disjoncteur, et un disjoncteur. Le mécanisme de déclenchement comprend une broche de saut (17), une boucle de retour (18) et un verrou de verrouillage (20), qui sont agencés de manière rotative, la boucle de retour (18) étant d'une structure de levier d'économie de main-d'œuvre et comprenant un premier bras de levier (181) et un second bras de levier (182) ; une première partie de joint à recouvrement (1703) est disposée sur la broche de saut (17), une première partie d'ajustement par pressage (1801) est disposée de manière correspondante sur le premier bras de levier (181) ; et une seconde partie de joint à recouvrement (1803) est disposée sur le second bras de levier (182), et une seconde partie d'ajustement par pressage (2001) est disposée de manière correspondante sur le verrou de verrouillage (20). La boucle de saut (18) et le verrou de verrouillage (20) sont configurés de telle sorte que, au moyen d'une rotation relative entre eux, la première partie d'ajustement par pressage (1801) est ajustée par pressage sur la première partie de joint de recouvrement (1703) tandis que la seconde partie d'ajustement par pressage (2001) est ajustée par pressage sur la seconde partie de joint de recouvrement (1803), ainsi la rotation de la broche de saut (17) est limitée, un premier bras de force de rotation (L1) de la première partie d'ajustement par pressage (1801) étant plus petit qu'un second bras de force de rotation (L2) de la seconde partie de joint de recouvrement (1803).
PCT/CN2023/120109 2022-09-29 2023-09-20 Mécanisme de déclenchement de disjoncteur et disjoncteur WO2024067301A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202211200068.5A CN115513014A (zh) 2022-09-29 2022-09-29 断路器的脱扣机构和断路器
CN202211200055.8A CN115472471A (zh) 2022-09-29 2022-09-29 一种断路器以及组合开关电器
CN202211200055.8 2022-09-29
CN202211200068.5 2022-09-29

Publications (1)

Publication Number Publication Date
WO2024067301A1 true WO2024067301A1 (fr) 2024-04-04

Family

ID=90476237

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2023/120109 WO2024067301A1 (fr) 2022-09-29 2023-09-20 Mécanisme de déclenchement de disjoncteur et disjoncteur

Country Status (1)

Country Link
WO (1) WO2024067301A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040036562A1 (en) * 2002-08-21 2004-02-26 Siebels Randall L. Latch for an electrical device
CN201069745Y (zh) * 2007-06-07 2008-06-04 浙江正泰电器股份有限公司 一种小型剩余电流动作断路器的操作机构
CN201435358Y (zh) * 2009-04-20 2010-03-31 浙江正泰电器股份有限公司 小型剩余电流动作断路器的操作机构
CN201838528U (zh) * 2010-09-16 2011-05-18 方华朋 一种小型断路器
CN115472471A (zh) * 2022-09-29 2022-12-13 厦门宏发开关设备有限公司 一种断路器以及组合开关电器
CN115513014A (zh) * 2022-09-29 2022-12-23 厦门宏发开关设备有限公司 断路器的脱扣机构和断路器
CN218568759U (zh) * 2022-09-29 2023-03-03 厦门宏发开关设备有限公司 断路器的脱扣机构和断路器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040036562A1 (en) * 2002-08-21 2004-02-26 Siebels Randall L. Latch for an electrical device
CN201069745Y (zh) * 2007-06-07 2008-06-04 浙江正泰电器股份有限公司 一种小型剩余电流动作断路器的操作机构
CN201435358Y (zh) * 2009-04-20 2010-03-31 浙江正泰电器股份有限公司 小型剩余电流动作断路器的操作机构
CN201838528U (zh) * 2010-09-16 2011-05-18 方华朋 一种小型断路器
CN115472471A (zh) * 2022-09-29 2022-12-13 厦门宏发开关设备有限公司 一种断路器以及组合开关电器
CN115513014A (zh) * 2022-09-29 2022-12-23 厦门宏发开关设备有限公司 断路器的脱扣机构和断路器
CN218568759U (zh) * 2022-09-29 2023-03-03 厦门宏发开关设备有限公司 断路器的脱扣机构和断路器

Similar Documents

Publication Publication Date Title
CN109637907B (zh) 小型断路器
CN109585233B (zh) 小型断路器
CN101677049B (zh) 一种改进的断路器
CN101231926A (zh) 小型断路器的操作机构
CA2783232C (fr) Dispositif de commutation electrique et mecanisme connexe de declenchement secondaire
CN109599303B (zh) 小型断路器
WO2024067301A1 (fr) Mécanisme de déclenchement de disjoncteur et disjoncteur
CN218568759U (zh) 断路器的脱扣机构和断路器
US6642820B2 (en) Protective switch
CN211654742U (zh) 断路器的操作机构
EP4318536A1 (fr) Disjoncteur
CN201256130Y (zh) 一种改进的断路器
CN115513014A (zh) 断路器的脱扣机构和断路器
US4786771A (en) Circuit interrupter with two stage stopper preventing bounce back
JPH04229525A (ja) 多重回路ブレーカー
CN115472471A (zh) 一种断路器以及组合开关电器
CN112992620A (zh) 断路器的操作机构
WO2023236380A1 (fr) Disjoncteur actionné par courant résiduel
CN217009102U (zh) 一种断路器
CN112967910A (zh) 断路器的操作机构
CN114883154A (zh) 漏电保护单元以及剩余电流保护断路器
US3426301A (en) Interconnected multipole circuit breaker
CN211350534U (zh) 断路器的操作机构
CN221125852U (zh) 一种小型断路器
WO2021142912A1 (fr) Nouveau disjoncteur mécanique

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23870533

Country of ref document: EP

Kind code of ref document: A1