CN213242437U

CN213242437U - Circuit breaker

Info

Publication number: CN213242437U
Application number: CN202021203866.XU
Authority: CN
Inventors: 顾斌斌; 卢科军; 朱俊
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2020-06-25
Filing date: 2020-06-25
Publication date: 2021-05-18
Anticipated expiration: 2030-06-25

Abstract

A circuit breaker comprises a button mechanism, a lever mechanism and an electromagnetic system which are arranged in a circuit breaker shell, wherein a wire inlet end and the button mechanism of the circuit breaker are arranged at one end of the circuit breaker shell, the button mechanism comprises a button, a connecting rod and a reset spring part, a button hole is formed in an operating surface at one end of the circuit breaker shell, one end of the button extends out of the circuit breaker shell for the operating end to be used for pressing operation, and the wire inlet end protrudes out of the plane where the button hole is located and is used for being in plug-in fit with a power supply device; the lever mechanism comprises a rotating shaft, a tripping rod, a linkage piece and a lock catch; the button is pressed by external force, the button drives the rotating shaft through the connecting rod, the lever mechanism is pushed to enable the movable contact to be in contact with the fixed contact to achieve closing, when the electromagnetic system is triggered due to a breaker fault, the electromagnetic system enables the lock catch and the trip rod to be tripped to achieve tripping and opening, the button is reset through the reset spring, the rotating shaft is synchronously reset through the rotating shaft spring, closing operation is simple and convenient, and opening resetting is reliable.

Description

Circuit breaker

Technical Field

The utility model belongs to the low-voltage apparatus field relates to a circuit breaker, concretely relates to circuit breaker of simple and convenient combined floodgate of formula of inserting soon.

Background

The existing miniature circuit breaker mostly adopts a rocker type handle to carry out switching-on and switching-off operations, and along with the requirements of circuit breaker miniaturization and equipment installation, the handle mode can not meet the actual operation requirements. In the prior art, a circuit breaker which adopts a button to perform switching-on and switching-off operations also exists, particularly an insertion type circuit breaker, but the circuit breaker still needs to be firstly subjected to insertion matching and then switched on, and the operation steps are relatively complicated.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a circuit breaker of simple and convenient combined floodgate of formula of inserting soon.

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

a circuit breaker comprises a circuit breaker shell, a button mechanism, a lever mechanism and an electromagnetic system, wherein the button mechanism, the lever mechanism and the electromagnetic system are arranged in the circuit breaker shell, a wire inlet end of the circuit breaker and the button mechanism are arranged at one end of the circuit breaker shell, the button mechanism comprises a button, a connecting rod and a reset spring part, a button hole is formed in an operating surface at one end of the circuit breaker shell, the button is slidably mounted in the button hole of the circuit breaker shell, one end of the button extends out of the circuit breaker shell for pressing operation as an operating end, the button is connected with the lever mechanism through the connecting rod, the reset spring part provides reset force for the button to drive the button to extend out of the circuit breaker shell, and the wire inlet end protrudes out; the lever mechanism comprises a rotating shaft, a tripping rod, a linkage piece and a lock catch; the rotating shaft is rotatably arranged in the breaker shell, the rotating shaft spring drives the rotating shaft to rotate towards the opening direction, the rotating shaft is in driving connection with the button through the connecting rod, the rotating shaft is hinged with the trip bar, the trip bar and the lock catch are rotatably arranged on the linkage piece and are connected with the lock catch hasp, the lock catch spring drives the lock catch to rotate towards the direction of connecting with the trip bar hasp, and the linkage piece is connected with the moving contact; the button is pressed by external force, the button drives the rotating shaft through the connecting rod, the lever mechanism is pushed to enable the movable contact to be in contact with the fixed contact to achieve closing, when the breaker fails to enable the electromagnetic system to trigger, the electromagnetic system enables the lock catch and the trip rod to be tripped to achieve tripping and opening, the button resets through the reset spring part, and the rotating shaft synchronously resets through the rotating shaft spring.

Preferably, the electromagnetic system is matched with the lock catch of the lever mechanism through the tripping transmission member, the electromagnetic system comprises an armature which is rotatably installed in the shell, and the electromagnetic system drives the tripping transmission member through the armature to toggle the lock catch so as to enable the lock catch to be connected with and disconnected from the hasp of the tripping rod.

Preferably, the electromagnetic system comprises a coil, a coil framework, an oil cup and an armature, an oily medium, an iron core and an iron core reset spring are arranged in the oil cup, the oil cup is installed in the coil framework, the coil is wound on the coil framework, the armature is rotatably arranged in the shell of the circuit breaker, and one end of the armature is opposite to one end of the iron core.

Preferably, the circuit breaker further comprises a bracket, wherein the bracket comprises two bracket side plates which are arranged at intervals relatively, and a first bracket shaft, a second bracket shaft, a third bracket shaft and a fourth bracket shaft which are connected between the two bracket side plates; the rotating shaft is rotatably installed on the first support shaft through a rotating shaft spring, the tripping transmission part is rotatably installed on the second support shaft, the moving contact is rotatably installed on the third support shaft, the armature is rotatably installed on the fourth support shaft, and the first support shaft, the second support shaft, the third support shaft and the fourth support shaft are sequentially arranged from one end to the other end of the support side plate.

Preferably, the linkage piece is of a U-shaped structure, the trip bar is of a sheet structure, a trip hook matched with the lock catch in a hasp mode is arranged on one side edge of the trip bar, one end of the trip bar extends into a U-shaped groove of the linkage piece in the U-shaped structure and is hinged to the linkage piece, the lock catch comprises a lock catch rotating shaft, a lock catch portion is arranged on the lock catch rotating shaft, the lock catch rotating shaft is inserted into side walls on two sides of the U-shaped structure of the linkage piece, and the lock catch portion on the lock catch rotating shaft is matched with the trip hook of the trip bar in the U-shaped groove of the U-shaped structure.

Preferably, the side walls of the two sides of the U-shaped structure of the linkage piece are respectively provided with a first linkage hole for being hinged with the trip bar, a second linkage hole for installing the lock catch and a third linkage hole for being connected with the moving contact; on the lateral wall of the two sides of the U-shaped structure, one side of the second linkage hole is provided with a limiting groove for limiting the rotation angle of the lock catch, and the bottom wall of the U-shaped structure is provided with an avoiding groove for avoiding the rotation of the jump buckle rod.

Preferably, the lock catch comprises a lock catch plate, a lock catch rotating shaft arranged on one side of the lock catch plate in a protruding mode, and a lock catch driving shaft arranged on the other side of the lock catch plate in a protruding mode, wherein a lock catch part is arranged in the middle of the lock catch rotating shaft, one side of the lock catch part is an arc surface and matched with a jump catch buckle of the jump buckle rod, and the other side of the lock catch part is a half shaft notch used for avoiding the jump buckle hook of the jump buckle rod; the side, provided with the lock catch rotating shaft, of the lock catch plate is further provided with a lock catch limiting shaft, the lock catch is rotatably installed on the linkage part through the lock catch rotating shaft, and the lock catch spring drives the lock catch limiting shaft to rotate and limit to be matched with the side, close to the linkage part, of the lock catch limiting shaft.

Preferably, one end of the moving contact is provided with a moving contact, the other end of the moving contact is a moving contact mounting part, the moving contact mounting part is of a U-shaped structure, and two side walls of the U-shaped structure are provided with a moving contact rotating hole used for rotatably mounting the moving contact and a moving contact driving hole used for being connected with the linkage part; the moving contact driving hole is located between the moving contact rotating hole and the moving contact, the moving contact is located on the outer side, away from the U-shaped structure, of the end portion of the moving contact, and the moving contact rotating hole is a long strip-shaped waist-shaped hole.

Preferably, the tripping transmission part comprises a transmission part rotating shaft, a first driving arm, a second driving arm and a third driving arm are arranged on the side wall of the transmission part rotating shaft in a protruding mode, the first driving arm is used for being in driving fit with the armature, the second driving arm is used for being in driving fit with the lock catch, the third driving arm is used for being in spring fit with the transmission part, and the transmission part spring drives the tripping transmission part to rotate in a direction away from the lock catch and close.

Preferably, armature includes the armature trigger piece of one end and the armature installation department of one end, the armature installation department becomes U type structure, and the U type structure both sides lateral wall of armature installation department is used for rotating the installation, and U type structure bottom one side is used for the drive transmission part that trips, armature trigger piece one end is buckled with U type structure bottom opposite side and is connected, and the other end extends to electromagnetic system one end.

The utility model discloses a circuit breaker, when the external plug-in connection of inlet wire end, external force is in step pressed the button, promotes the one end of the connecting rod that links to each other with the button, and the other end of connecting rod inserts in the pivot, and the pivot promotes lever mechanism, realizes the combined floodgate function, and is easy and simple to handle; during switching off, the electromagnetic system lock catch enables the lock catch and the tripping rod to be separated and tripped, the switching off function is achieved, the button resets through the reset spring part, the rotating shaft synchronously resets through the rotating shaft spring, the circuit breaker is enabled to recover to the initial state, switching-on operation is convenient, and switching-off resetting is reliable.

Drawings

Fig. 1 is a schematic diagram of the internal layout of the circuit breaker in the open state of the utility model;

fig. 2 is a schematic diagram of the internal layout of the circuit breaker in the closing state (with the bracket 7 removed);

fig. 3 is a schematic diagram of the circuit breaker according to the present invention, in which the button is pressed by the plug or the panel of the power source end after the circuit breaker is tripped, and the circuit breaker cannot be reset;

fig. 4 is an exploded view of the circuit breaker of the present invention;

fig. 5 is an exploded view of the lever mechanism of the circuit breaker of the present invention;

fig. 6 is an exploded view of the latch of the lever mechanism of the circuit breaker of the present invention;

fig. 7 is a tripping schematic diagram of the lever mechanism of the circuit breaker of the present invention.

Detailed Description

The following describes the circuit breaker according to the present invention with reference to the accompanying drawings. The circuit breaker of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1, the utility model discloses a circuit breaker includes circuit breaker casing 2, and set up the button mechanism in circuit breaker casing 2, lever mechanism, tripping device and arc control device, button mechanism and lever mechanism connect, lever mechanism is connected with moving contact 11, static contact 17 sets up and corresponds the setting with moving contact 11 in circuit breaker casing 2, external force presses down button mechanism, button mechanism drives moving contact 11 through lever mechanism and moves and realize the circuit breaker combined floodgate with the contact of static contact 17, lever mechanism includes hasp 10 of hasp connection, when the circuit breaker breaks down, for example, short circuit or overload appear, tripping device moves drive hasp 10 and removes hasp connection and makes lever mechanism dropout, realize the dropout separating brake.

As shown in fig. 1-3, the utility model discloses a circuit breaker of simple and convenient combined floodgate of formula of inserting soon, including circuit breaker casing 2 to and button mechanism, lever mechanism, tripping device and the arc extinguishing device of setting in circuit breaker casing 2, the inlet wire end of circuit breaker with button mechanism sets up the one end at circuit breaker casing 2, and the leading-out terminal sets up the other end at circuit breaker casing 2. The button mechanism comprises a button 3, a button hole 201 is formed in an operation surface of one end of the breaker shell 2, the button 3 is slidably mounted in the button hole 201 of the breaker shell 2, one end of the button 3 is an operation end, the operation end extends out of the breaker shell 2 from the button hole 201 and is used for pressing, the other end extends into the breaker shell 2, and the button 3 can be completely retracted into the breaker shell 2 by pressing the button 3. The incoming line end protrudes out of the plane where the button hole 201 is located and is used for being electrically connected with a plug or a power supply end and other power supply devices in a plugging matching mode, when the incoming line end is plugged with the plug or the power supply end and other power supply devices, the button 3 is pressed by a panel of the power supply device to achieve switching-on, the button 3 achieves a function of pressing the switching-on by means of external force of the plug or the panel of the power supply end when the circuit breaker is plugged, and operation is simple and convenient.

As shown in fig. 1-3, in an embodiment, an incoming line end of the circuit breaker and the button mechanism are disposed at one end of the circuit breaker housing 2, the outgoing line end is disposed at the other end of the circuit breaker housing 2, the outgoing line end and the button mechanism are respectively located at two sides of one end of the circuit breaker housing 2, the tripping mechanism is an electromagnetic system, the electromagnetic system is disposed at the other end of the circuit breaker housing 2, the lever mechanism, the moving contact 11, the static contact 17 and the arc extinguishing device are disposed at the middle portion of the circuit breaker housing 2, the lever mechanism and the moving contact 11 are disposed at one side of the middle portion of the circuit breaker housing 2 and disposed between the outgoing line end and the electromagnetic system, and the arc extinguishing device and the static contact 17 are disposed at the other side of. The circuit breaker layout structure of this embodiment is compact reasonable, can reduce the volume of circuit breaker.

Specifically, as shown in fig. 1 to 4, the incoming line end includes an L-pole contact plate 1 and an N-pole contact plate 15, one end of each of the L-pole contact plate 1 and the N-pole contact plate 15 protrudes out of a plane where the button hole 201 is located, and is used for being electrically connected in a plug-in fit manner, the other end of the L-pole contact plate 1 is electrically connected with the moving contact 11 through a flexible wire, and the other end of the N-pole contact plate 15 is electrically connected with the coil 14 of the electromagnetic system. The outlet end comprises an L-pole wiring board 19, one end of the L-pole wiring board 19 extends out of the breaker shell 2 and is used for inserting, matching and electrically connecting, and the other end of the L-pole wiring board 19 is connected with the fixed contact 17 through a coil 14 of the electromagnetic system.

Preferably, an insertion protection portion 202 protruding out of the plane where the button hole 201 is located is arranged at one end, provided with a wire inlet end, of the breaker housing 2, one end of each of the L-pole contact plate 1 and the N-pole contact plate 15 protrudes out of the plane where the button hole 201 is located and is arranged in the insertion protection portion 202, the breaker is in insertion fit with a plug or a power supply end through the insertion protection portion 202, the L-pole contact plate 1 and the N-pole contact plate 15 are electrically connected with the plug or the power supply end, and the insertion protection portion 202 plays a role in guiding and isolating the L-pole contact plate 1 and the N-pole contact plate 15. An insertion partition plate is also arranged in the insertion protection portion 202 to separate the L-pole contact plate 1 from the N-pole contact plate 15.

As shown in fig. 1 and 4, the button mechanism includes a button 3, a connecting rod 5 and a reset spring member 4, the button 3 is slidably mounted in a button hole 201 at one end of the circuit breaker housing 2, the button 3 is connected with the lever mechanism through the connecting rod 5, and the reset spring member 4 provides a reset force for the button 3 to drive the button 3 to extend out of the circuit breaker housing 2; the 3 one end of button stretches out the outer operation that is used for of circuit breaker casing 2 for the operating end, and the other end stretches into in circuit breaker casing 2, presses button 3 and can make button 3 retract in circuit breaker casing 2 completely. Specifically, one side of button 3 is equipped with the button drive hole that is used for being connected with connecting rod 5, spring part 4 that resets is the pressure spring, installs in the bottom side of button 3, and one end is connected with button 3, and the other end is connected with the spacing protruding muscle in the circuit breaker casing 2, presses button 3 and spring part 4 that resets and is the sharp and arranges, is located arc control device's top.

As shown in fig. 1, 4-5, the lever mechanism is a four/five-bar structure including a snap-fit latch 10, and in this embodiment, the lever mechanism includes a rotating shaft 6, a trip lever 8, a linkage 9 and a latch 10; the circuit breaker is characterized in that the rotating shaft 6 is rotatably installed in the circuit breaker shell 2, the rotating shaft 6 is in driving connection with the button 3 through the connecting rod 5, the rotating shaft 6 is hinged to the trip bar 8, the trip bar 8 and the lock catch 10 are rotatably installed on the linkage piece 9, the trip bar 8 is in hasp connection with the lock catch 10, the lock catch spring 13 drives the lock catch 10 to rotate towards the direction of hasp connection with the trip bar 8, the linkage piece 9 is connected with the moving contact 11, and the rotating shaft 6, the trip bar 8, the linkage piece 9 and the lock catch 10 form a four-link/five-bar structure. The button 3 is pressed, the button 3 drives the rotating shaft 6 through the connecting rod 5, the rotating shaft 6 drives the linkage 9 to rotate through the trip rod 8 and the latch 10, the moving contact 11 is driven to swing, and the moving contact is in contact with the static contact 17 to achieve closing.

Preferably, the circuit breaker still includes the dropout driving medium 21, electromagnetic system triggers lever mechanism dropout through the cooperation of dropout driving medium 21 and lever mechanism's hasp 10, the dropout driving medium 21 rotates and installs in circuit breaker casing 2, and one end sets up with electromagnetic system relatively, and the other end sets up with lever mechanism's hasp 10 relatively, and when the circuit breaker broke down, electromagnetic system action promoted the one end of dropout driving medium 21, and the other end of dropout driving medium 21 stirs hasp 10 and makes hasp 10 and jump pin 8's hasp connection release, makes lever mechanism dropout realize the separating brake function.

The breaker can not be opened under the normal condition in this embodiment, only the return circuit transships or then opens the brake through electromagnetic system under the short circuit condition. As another embodiment, the switching-off can be realized by pulling the button mechanism, when the circuit breaker is in a switching-on state, the button mechanism is pulled, the button mechanism drives the rotating shaft 6 to rotate towards the switching-off direction through the connecting rod 5, the lever mechanism drives the moving contact 11 to move and separate from the static contact 17 to realize the switching-off of the circuit breaker, a pulling notch convenient for operating the button 3 is arranged on one side of the button hole 201 of the circuit breaker, and the button 3 retracted into the circuit breaker shell 2 is pulled out.

In particular, according to the preferred embodiment of the present invention, in a closing state of the circuit breaker, when the button 3 is not blocked by the plug or the power end panel, the reset spring member 4 drives the button mechanism to reset, the button mechanism drives the rotating shaft 6 through the connecting rod 5, and the lever mechanism drives the moving contact 11 to move and separate from the static contact 17, so as to achieve opening of the circuit breaker. Only when the circuit breaker cartridge is on power supply unit and button mechanism is pressed by power supply unit's panel and can realize closing a floodgate promptly, when the circuit breaker was extracted, automatic separating brake of spring part 4 drive circuit breaker that resets improves the security. Compared with the embodiment of pulling the opening, the embodiment needs to increase the force value of the reset spring member 4 and reduce the over-dead-center angle of the lever mechanism.

As shown in fig. 1 and 4, the axial direction of the coil 14 of the electromagnetic system is perpendicular to the plugging direction of the incoming line end, that is, perpendicular to the sliding direction of the button 3, the N-pole contact plate 15 is disposed close to one side of the breaker housing 2 and connected to one end of the coil 14, and the L-pole terminal plate 19 is disposed close to the other side of the breaker housing 2 and connected to the other end of the coil 14. Arc control device and static contact 17 set up between L utmost point wiring board 19 and button mechanism, lever mechanism and moving contact 11 are located between L utmost point wiring board 19 and the arc control device, the arc control device includes the explosion chamber and sets up a plurality of arc extinguishing bars pieces in the explosion chamber, static contact 17 is equipped with the one end of stationary contact and stretches into in the explosion chamber, and the other end is connected with the coil 14 other end, and the explosion chamber is equipped with open-ended one end orientation and is equipped with one side of lever mechanism and moving contact 11. In this embodiment, the tripping mechanism is an electromagnetic system, and may also be a thermal tripping mechanism including a bimetallic strip or an electric leakage tripping mechanism as required.

As shown in fig. 1 and 4, as a preferred scheme, the electromagnetic system is a hydraulic electromagnetic system, and includes a coil 14, a coil frame 16, an oil cup 18 and an armature 20, an oil medium, an iron core and an iron core return spring are disposed in the oil cup 18, the oil cup 18 is mounted in the coil frame 16, the coil 14 is wound on the coil frame 16, the armature 20 is rotatably disposed in the circuit breaker housing 2, one end of the armature 20 is disposed opposite to one end of the electromagnetic system, i.e., opposite to one end of the iron core, and the other end is disposed opposite to a trip transmission member 21, the electromagnetic system drives the trip transmission member 21 through the armature 20 to trip the latch 10 from the latch connection of the trip rod 8, when an overload or a short circuit occurs, the current in the coil 14 increases, the iron core moves toward the armature 20 and attracts the armature 20, the armature 20 rotates to sequentially push one end of the trip transmission member 21, and the other end of the trip transmission member 21 trips the latch 10, the lever mechanism is released to realize the brake separating function. Of course, the electromagnetic system may also be a conventional electromagnetic release, and the release transmission member 21 is driven to trigger the release by ejecting the striker when the circuit breaker fails.

Specifically, the whole straight parallelepiped shape that is of circuit breaker, the section that the circuit breaker is on a parallel with circuit breaker thickness becomes the rectangle, according to the direction shown in fig. 1, inlet wire end and button mechanism arrange the top one end at circuit breaker casing 2, the inlet wire end is located top one end left side, button mechanism is located top one end right side, be equipped with button hole 201 on the planar right side of parallelepiped shape top one side place, the left side is outstanding to be equipped with grafting protection part 202, the right side at below one end is arranged to the outlet terminal, electromagnetic system arranges the below one end in circuit breaker casing 2, electromagnetic system's coil 14's axial is along controlling the level setting, lever mechanism and moving contact 11 set up the left side at the middle part in circuit breaker casing 2, arc extinguishing device and static contact 17 set up the right side at the middle part in circuit breaker casing 2, be located between button mechanism and the outlet terminal. The incoming line end comprises an L pole contact plate 1 and an N pole contact plate 15, the L pole contact plate 1 and the N pole contact plate 15, one ends of the L pole contact plate 1 and the N pole contact plate 15 protrude out of the plane where the button hole 201 is located and are arranged in the inserting protection portion 202, the inserting protection portion 202 and the breaker shell 2 are integrally formed, the N pole contact plate 15 is bent towards the left side inside the breaker shell 2 and is tightly attached to the left side of the breaker shell 2 to be connected with one end of a coil 14 of an electromagnetic system, the L pole contact plate 1 is bent towards one side far away from a reader inside the breaker shell 2 and extends from the middle of the breaker shell 2 to a moving contact, the L pole contact plate 1 and the moving contact are electrically connected through flexible connection, the lever mechanism is arranged above the L pole contact plate 1 in a stacked mode, the tripping transmission.

The utility model discloses a during the circuit breaker use, when the wiring in L utmost point contact plate 1, the 15 outer plug-in connections of N utmost point contact plate, the panel effect of plug or power end is on button 3, and external force presses down button 3 in step, and button 3 passes through connecting rod 5 drive pivot 6, promotes lever mechanism and makes the switch carry out the combined floodgate operation, and after sound contact put in place, the circuit breaker closed a floodgate promptly, as shown in figure 2 (support 7 does not show), external force presses down button 3 and makes the circuit breaker combined floodgate back, in the 3 complete indentation circuit breaker casing 2 of button.

When the breaker breaks down and causes the electromagnetic system to trigger, the electromagnetic system actuation armature 20 (as in fig. 3), promote the one end of the tripping transmission part 21 in proper order, the other end of the tripping transmission part 21 clockwise stirs the lock catch 10 to make the lock catch 10 and the tripping rod 8 trip, realize the tripping and separating brake function, as shown in fig. 3, after the breaker triggers the electromagnetic system by overload or short circuit and causes the breaker to trip, the button 3 is pressed by the panel of the power supply device such as plug or power end, etc., and can not reset, namely, when the breaker trips and separates brake, the button 3 can keep retracting in the breaker shell 2 when being limited, that is to say, the button 3 keeps retracting in the breaker shell 2, the tripping and separating brake function of the breaker can not be influenced, and the circuit protection. Comparing fig. 2 and 3, the button 3 and the shaft 6 are still maintained at the closing position, and the trip bar 8 and the latch 10 are released from the snap fit.

When the button 3 is not pressed by a plug or a power supply end panel, as shown in fig. 1, the button 3 is reset through the reset spring part 4, the rotating shaft 6 is reset synchronously through the rotating shaft spring 12, the rotating shaft spring 12 drives the rotating shaft 6 to rotate towards the opening direction, and the reset rotation of the rotating shaft 6 drives the trip bar 8 to be in snap-fit with the latch 10 at the same time, so that the circuit breaker is restored to the initial state.

Further, as shown in fig. 5, the circuit breaker further includes a bracket 7 for matching and installing the lever mechanism, the trip transmission member 21 and the armature 20, where the bracket 7 includes two bracket side plates 71 disposed at an interval, and a first bracket shaft 72, a second bracket shaft 73, a third bracket shaft 74 and a fourth bracket shaft 75 connected between the two bracket side plates 71; the rotating shaft 6 is rotatably mounted on a first support shaft 72 through a rotating shaft spring 12, the trip transmission member 21 is rotatably mounted on a second support shaft 73, the movable contact 11 is rotatably mounted on a third support shaft 74, the armature 20 is rotatably mounted on a fourth support shaft 75, and the first support shaft 72, the second support shaft 73, the third support shaft 74 and the fourth support shaft 75 are sequentially arranged from one end to the other end of the support side plate 71. Preferably, the armature 20 and the trip actuator 21 are located on one side of the bracket 7, the lever mechanism is located on the other side of the bracket 7, the lever mechanism is located between the bracket 7 and the arc extinguishing chamber, and the armature 20, the trip actuator 21 and the lever mechanism are located between the two bracket side plates 71 in the thickness direction of the circuit breaker. The utility model discloses a mode of support 7, the lever mechanism of being convenient for, the assembly of dropout driving medium 21 and armature 20, the production and the automatic assembly of being convenient for to and the cooperation location between each mechanism. Of course, as a deterioration scheme, the support may not be provided, and the rotating shaft 6, the trip transmission member 21, the movable contact 11 and the armature 20 may be directly rotatably mounted on a protruding shaft in the circuit breaker housing 2.

As shown in fig. 4-7, another improvement point of the present invention is still a modified embodiment of the lever mechanism, and similar descriptions are further provided below, and of course, the circuit breaker of the present invention is not limited to the preferred lever mechanism of this embodiment, but can also be an existing four-bar or five-bar mechanism.

As shown in fig. 4-5, the rotating shaft 6 is provided with a rotating shaft rotating hole 601 for rotatably installing the rotating shaft 6, a rotating shaft connecting hole 602 for connecting with the connecting rod 5, and a rotating shaft hinge hole 603 for hinging with the jump buckle rod 8. Specifically, 6 one end of pivot is equipped with the pivot and rotates hole 601, and the other end extends the pivot articulated arm that is equipped with two relative intervals and sets up, is equipped with pivot articulated hole 603 on two pivot articulated arms, and the one end of jump knot pole 8 stretches into between two pivot articulated arms, and is articulated through first round pin axle, pivot connecting hole 602 set up and rotate between hole 601 and pivot articulated hole 603 in the pivot, protruding being equipped with the spacing protruding muscle 604 of pivot in one side of pivot 6, the spacing protruding muscle 604 of pivot becomes convex for with the spacing direction cooperation of support 7. In this embodiment, the rotating shaft limiting convex rib 604 simultaneously plays a role in assembling the rotating shaft return spring 12 and the limiting guide rotating shaft 6, one end of the rotating shaft return spring 12 is clamped on the rotating shaft limiting convex rib 604, and the rotating shaft 6 is driven to rotate and reset during brake opening; when the switch is closed, the rotating shaft limiting convex rib 604 limits the position of the bracket 7, controls the rotating angle of the rotating shaft 6 and controls the switch-on angle.

As shown in fig. 4-7, the trip bar 8 and the latch 10 are rotatably mounted on the linkage 9, and the trip bar 8 is in snap-fit connection with the latch 10, the latch spring 13 drives the latch 10 to rotate in a direction of snap-fit connection with the trip bar 8, and the movable contact 11 is rotatably mounted in the circuit breaker housing 2 and is in driving connection with the linkage 9.

As the utility model discloses a preferred embodiment of modified, link 9 becomes U type structure, jump buckle rod 8 sheeting structure, be equipped with on one side of jumping buckle rod 8 to be used for jumping with hasp 10 snap-fit and detain 803, jump buckle rod 8's one end is stretched linkage 9 becomes U type inslot of U type structure and links 9 articulated, hasp 10 includes hasp pivot 1002, is equipped with hasp portion 1005 on hasp pivot 1002, hasp pivot 1002 cartridge is on the both sides lateral wall of the U type structure of link 9, and makes hasp portion 1005 in the hasp pivot 1002 and jump buckle rod 8 collude 803 and collude the U type inslot cooperation of U type structure, and this kind of assembly structure can effectively guarantee hasp connection's reliability. Particularly, one side of the locking part 1005 is an arc surface and is in snap fit with the jump hook 803 of the jump rod 8, and the other side of the locking part 1005 is a half shaft notch for avoiding the jump hook 803 of the jump rod 8, so that the structure ensures that the tripping force of the switch is small, the reset is more favorable, and the re-snap fit of the jump rod 8 and the lock catch 10 is favorable.

Specifically, the linkage 9 is of a U-shaped structure, and the side walls of the two sides of the U-shaped structure are respectively provided with a first linkage hole 901 for being hinged to the trip bar 8, a second linkage hole 902 for installing the latch 10, and a third linkage hole 903 for being connected to the moving contact 11. Further, on the lateral wall of the two sides of the U-shaped structure, a limiting groove 904 for limiting the rotation angle of the lock catch 10 is arranged on one side of the second linkage hole 902, and an avoiding groove 905 for avoiding the rotation of the trip bar 8 is arranged on the bottom wall of the U-shaped structure.

Preferably, the jump buckle rod 8 is of a sheet structure, one end of the jump buckle rod is provided with a first jump buckle hinge hole 801 for being hinged with the rotating shaft 6, the other end of the jump buckle rod is provided with a second jump buckle hinge hole 802 for being hinged with the linkage piece 9, and a jump buckle hook 803 for being in snap fit with the buckle 10 is arranged on one side edge of the jump buckle rod 8.

Preferably, the lock catch 10 is hinged to the linkage 9, and includes a catch portion 1005 for snap-fitting with the trip bar 8, and a catch driving portion 1003 for fitting with the trip transmission member 21. Preferably, the lock catch 10 comprises a lock catch plate 1001, a lock catch rotating shaft 1002 arranged on one side of the lock catch plate 1001 in a protruding manner, and a lock catch driving shaft 1003 arranged on the other side of the lock catch plate 1001 in a protruding manner, wherein a lock catch portion 1005 is arranged in the middle of the lock catch rotating shaft 1002, one side of the lock catch portion 1005 is in snap fit with a jump catch hook 803 of the jump catch rod 8 through an arc surface, and the other side of the lock catch portion 1005 is a half-shaft notch for avoiding the jump catch hook 803 of the jump catch rod 8, so that the structure enables the switch to have small tripping force and. Further, a lock catch limiting shaft 1004 is further arranged on one side, provided with a lock catch rotating shaft 1002, of the lock catch plate 1001, the lock catch 10 is rotatably mounted on the linkage 9 through the lock catch rotating shaft 1002, and the lock catch spring 13 drives the lock catch limiting shaft 1004 of the lock catch 10 to rotate to be in limiting fit with one side close to the linkage 9. Further, the lock catch 10 is integrally formed, and the lock catch limiting shaft 1004 and the lock catch driving shaft 1003 are coaxially arranged.

Specifically, as shown in fig. 5 to 6, one end of the trip bar 8, which is provided with a second trip hinge hole 802 and a trip hook 803, extends into a U-shaped groove of the U-shaped structure of the linkage 9, and the second pin 906 hinges the trip bar 8 and the linkage 9 through the first linkage hole 901 and the first trip hinge hole 801; the lock catch 10 is inserted into one side of the U-shaped structure of the linkage member 9, the lock catch rotating shaft 1002 penetrates through the second linkage hole 902, the lock catch portion 1005 on the lock catch rotating shaft 1002 is matched with the jump catch hook 803 of the jump catch rod 8 in the U-shaped groove of the U-shaped structure, the lock catch plate 1001 of the lock catch 10 is located on the outer side of the U-shaped structure, the lock catch limiting shaft 1004 extends into the limiting groove 904, and the lock catch spring 13 is sleeved on the lock catch rotating shaft 1002.

As shown in fig. 5, the moving contact 11 includes a moving contact 1101 at one end, and a moving contact mounting portion at the other end, the moving contact mounting portion is a U-shaped structure, a moving contact rotating hole 1102 for moving contact rotation mounting and a moving contact driving hole 1103 for connecting with the linkage 9 are disposed on two side walls of the U-shaped structure, and a moving contact limiting shaft 1104 passing through the U-shaped structure is further disposed to play a limiting role, thereby ensuring reliable switch-on of the switch. Further, the moving contact driving hole 1103 is located between the moving contact rotating hole 1102 and the moving contact 1101, the moving contact 1101 is located on the outer side of the end portion of the moving contact 11 far away from the U-shaped structure, and the moving contact rotating hole 1102 is a long strip-shaped kidney-shaped hole. Specifically, the U-shaped structure of the moving contact mounting portion is sleeved outside the linkage 9 and is located inside the support 7, the moving contact is mounted on the third support shaft 74 of the support 7 or inside the circuit breaker shell 2 through the moving contact rotating hole 1102, the third shaft pin penetrates through the moving contact driving hole 1103 and the third linkage hole 903 to hinge the moving contact 11 and the linkage 9, the moving contact spring sleeve is arranged on the third shaft pin to elastically fix the moving contact 11 and the linkage 9, the linkage 9 can drive the moving contact 11 to rotate around a rotating shaft penetrating through the moving contact rotating hole 1102, and the long strip-shaped kidney-shaped hole structure of the moving contact spring and the moving contact rotating hole 1102 provides reliable contact of the moving contact 11 and the static contact 17.

As shown in fig. 2 and 5, the trip transmission member 21 includes a transmission member rotating shaft, a first driving arm for driving and matching with the armature 20, a second driving arm for matching with the latch 10, and a third driving arm for matching with a transmission member spring are provided on a side wall of the transmission member rotating shaft in a protruding manner, the transmission member spring drives the trip transmission member 21 to rotate in a direction away from the latch 10 and close to the armature 20, and the transmission member spring is a torsion spring and is installed in the circuit breaker housing 2.

As shown in fig. 4, the armature 20 includes an armature trigger piece at one end and an armature installation portion at one end, the armature installation portion is a U-shaped structure, the side walls of two sides of the U-shaped structure of the armature installation portion are used for rotating the installation, one side of the bottom of the U-shaped structure is used for driving the tripping transmission member 21, one end of the armature trigger piece is connected with the other side of the bottom of the U-shaped structure in a bending manner, and the other end of the armature trigger piece extends towards one end of the electromagnetic system and is arranged corresponding to. The rotating part of the armature 20 is arranged above the coil of the electromagnetic system, and the trip transmission member 21 is rotatably arranged above the armature 20.

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

Claims

1. The utility model provides a circuit breaker, includes circuit breaker casing (2) to and button mechanism, lever mechanism and the electromagnetic system of setting in circuit breaker casing (2), its characterized in that:

the incoming line end of the circuit breaker and the button mechanism are arranged at one end of a circuit breaker shell (2), the button mechanism comprises a button (3), a connecting rod (5) and a reset spring part (4), a button hole (201) is formed in an operation surface of one end of the circuit breaker shell (2), the button (3) is slidably installed in the button hole (201) of the circuit breaker shell (2), one end of the button (3) extends out of the circuit breaker shell (2) for the operation end to be used for pressing operation, the button (3) is connected with the lever mechanism through the connecting rod (5), the reset spring part (4) provides reset force for the button (3) to drive the button (3) to extend out of the circuit breaker shell (2), and the plane where the incoming line end protrudes out of the button hole (201) is used for being in plug-in fit with a power supply;

the lever mechanism comprises a rotating shaft (6), a jump buckle rod (8), a linkage piece (9) and a lock catch (10); the rotating shaft (6) is rotatably installed in the breaker shell (2), the rotating shaft spring (12) drives the rotating shaft (6) to rotate towards the opening direction, the rotating shaft (6) is in driving connection with the button (3) through the connecting rod (5), the rotating shaft (6) is hinged with the trip bar (8), the trip bar (8) and the lock catch (10) are rotatably installed on the linkage piece (9), the trip bar (8) is in hasp connection with the lock catch (10), the lock catch spring (13) drives the lock catch (10) to rotate towards the hasp connection direction with the trip bar (8), and the linkage piece (9) is connected with the moving contact (11);

the external force presses the button (3), the button (3) drives the rotating shaft (6) through the connecting rod (5), the lever mechanism is pushed to enable the movable contact (11) to be in contact with the static contact (17) to achieve closing, when the breaker fails to enable the electromagnetic system to trigger, the electromagnetic system enables the lock catch (10) and the tripping rod (8) to be tripped to achieve tripping and separating, the button (3) resets through the reset spring part (4), and the rotating shaft (6) resets synchronously through the rotating shaft spring (12).

2. The circuit breaker of claim 1, wherein: the electromagnetic system is matched with a lock catch (10) of the lever mechanism through a tripping transmission part (21), the electromagnetic system comprises an armature (20) which is rotatably installed in the shell, and the electromagnetic system drives the tripping transmission part (21) through the armature (20) to toggle the lock catch (10) to enable the lock catch (10) to be in hasp connection with the tripping rod (8) to be tripped.

3. The circuit breaker of claim 2, wherein: the electromagnetic system comprises a coil (14), a coil framework (16), an oil cup (18) and an armature (20), wherein an oily medium, an iron core and an iron core reset spring are arranged in the oil cup (18), the oil cup (18) is installed in the coil framework (16), the coil (14) is wound on the coil framework (16), the armature (20) is rotatably arranged in a circuit breaker shell (2), and one end of the armature (20) is opposite to one end of the iron core.

4. The circuit breaker of claim 2, wherein: the circuit breaker further comprises a support (7), wherein the support (7) comprises two support side plates (71) which are arranged oppositely at intervals, and a first support shaft (72), a second support shaft (73), a third support shaft (74) and a fourth support shaft (75) which are connected between the two support side plates (71); the rotating shaft (6) is rotatably installed on a first support shaft (72) through a rotating shaft spring (12), the tripping transmission piece (21) is rotatably installed on a second support shaft (73), the moving contact (11) is rotatably installed on a third support shaft (74), the armature (20) is rotatably installed on a fourth support shaft (75), and the first support shaft (72), the second support shaft (73), the third support shaft (74) and the fourth support shaft (75) are sequentially arranged from one end to the other end of the support side plate (71).

5. The circuit breaker of claim 1, wherein: the linkage piece (9) is of a U-shaped structure, the trip rod (8) is of a sheet structure, a trip hook (803) which is used for being in snap fit with the lock catch (10) is arranged on one side edge of the trip rod (8), one end of the trip rod (8) extends into a U-shaped groove of the linkage piece (9) which is of the U-shaped structure and is hinged to the linkage piece (9), the lock catch (10) comprises a lock catch rotating shaft (1002), a lock catch part (1005) is arranged on the lock catch rotating shaft (1002), the lock catch rotating shaft (1002) is inserted into two side walls of the U-shaped structure of the linkage piece (9), and the lock catch part (1005) on the lock catch rotating shaft (1002) is matched with the trip hook (803) of the trip rod (8) in the U-shaped groove of the U-shaped structure.

6. The circuit breaker of claim 5, wherein: the side walls of two sides of the U-shaped structure of the linkage piece (9) are respectively provided with a first linkage hole (901) for being hinged with the trip bar (8), a second linkage hole (902) for installing the lock (10), and a third linkage hole (903) for being connected with the moving contact (11); on the lateral wall of the two sides of the U-shaped structure, one side of the second linkage hole (902) is provided with a limiting groove (904) for limiting the rotation angle of the lock catch (10), and the bottom wall of the U-shaped structure is provided with an avoiding groove (905) for avoiding the rotation of the jump buckle rod (8).

7. The circuit breaker of claim 5, wherein: the lock catch (10) comprises a lock catch plate (1001), a lock catch rotating shaft (1002) which is arranged on one side of the lock catch plate (1001) in a protruding mode, and a lock catch driving shaft (1003) which is arranged on the other side of the lock catch plate (1001) in a protruding mode, wherein a lock catch portion (1005) is arranged in the middle of the lock catch rotating shaft (1002), one side of the lock catch portion (1005) is an arc surface and is in snap fit with a jump buckle hook (803) of the jump buckle rod (8), and the other side of the lock catch portion is a half shaft notch and is used for avoiding the jump buckle hook (; the side, provided with the lock rotating shaft (1002), of the lock plate (1001) is further provided with a lock limiting shaft (1004), the lock (10) is rotatably installed on the linkage piece (9) through the lock rotating shaft (1002), and the lock spring (13) drives the lock limiting shaft (1004) of the lock (10) to rotate towards the side close to the linkage piece (9) for limiting matching.

8. The circuit breaker of claim 5, wherein: one end of the moving contact (11) is provided with a moving contact (1101), the other end of the moving contact is a moving contact mounting part, the moving contact mounting part is of a U-shaped structure, and moving contact rotating holes (1102) used for rotationally mounting the moving contact and moving contact driving holes (1103) used for being connected with the linkage piece (9) are formed in the side walls of the two sides of the U-shaped structure; the moving contact driving hole (1103) is located between the moving contact rotating hole (1102) and the moving contact (1101), the moving contact (1101) is located on the outer side, far away from the U-shaped structure, of the end portion of the moving contact (11), and the moving contact rotating hole (1102) is a long strip-shaped waist-shaped hole.

9. The circuit breaker according to claim 2 or 3 or 4, characterized in that: the tripping transmission part (21) comprises a transmission part rotating shaft, a first driving arm, a second driving arm and a third driving arm are arranged on the side wall of the transmission part rotating shaft in a protruding mode and used for being in driving fit with the armature (20), the second driving arm is used for being in fit with the lock catch (10), the third driving arm is used for being in fit with a transmission part spring, and the transmission part spring drives the tripping transmission part (21) to rotate towards the direction far away from the lock catch (10) and close to the armature (20).

10. The circuit breaker according to claim 2 or 3 or 4, characterized in that: armature (20) include the armature trigger piece of one end and the armature installation department of one end, the armature installation department becomes U type structure, and the U type structure both sides lateral wall of armature installation department is used for rotating the installation, and U type structure bottom one side is used for driving dropout driving medium (21), armature trigger piece one end is buckled with U type structure bottom opposite side and is connected, and the other end extends to electromagnetic system one end.