CN116230460A

CN116230460A - Quick automatic closing mechanism of circuit breaker and circuit breaker provided with same

Info

Publication number: CN116230460A
Application number: CN202310503654.5A
Authority: CN
Inventors: 张锐豪; 黄丽华; 陈泽纯; 韩茂龙; 刘朝鑫; 林泽鑫
Original assignee: Guangdong Mile Electric Co ltd
Current assignee: Guangdong Mile Electric Co ltd
Priority date: 2023-05-06
Filing date: 2023-05-06
Publication date: 2023-06-06
Anticipated expiration: 2043-05-06
Also published as: CN116230460B

Abstract

The invention relates to the technical field of circuit breakers, and particularly discloses a quick automatic switching-on mechanism of a circuit breaker and the circuit breaker provided with the same, wherein the quick automatic switching-on mechanism comprises a switching-on and switching-off mechanism and a switching mechanism for controlling the switching-on and switching-off of the switching-on and switching-off mechanism, the switching-on and switching-off mechanism comprises a mounting plate, a driving seat, a sliding seat, a screw sleeve and a connecting spring for connecting the screw sleeve and the sliding seat, and a push rod for controlling a brake contact to move is arranged at the outer side end of the sliding seat; the driving seat, the sliding seat and the threaded sleeve are all slidably mounted on the mounting plate, the sliding seat and the threaded sleeve are arranged on the opposite sides of the driving seat, and a limiting jacking block is mounted on one side, facing the driving seat, of the sliding seat; the driving seat is provided with a first guiding section, a limiting section and a second guiding section. According to the invention, the contact time of the moving contact and the fixed contact is shortened, so that a large closing arc generated in long closing time is avoided, and the service life of the circuit breaker is prolonged.

Description

Quick automatic closing mechanism of circuit breaker and circuit breaker provided with same

Technical Field

The invention particularly relates to the technical field of circuit breakers, in particular to a quick automatic closing mechanism of a circuit breaker and the circuit breaker provided with the quick automatic closing mechanism.

Background

A circuit breaker refers to a switching device capable of closing, carrying and opening a current under normal circuit conditions and closing, carrying and opening a current under abnormal circuit conditions within a prescribed time. The circuit breaker is divided into a high-voltage circuit breaker and a low-voltage circuit breaker according to the application range, and the division of a high-voltage boundary line and a low-voltage boundary line is fuzzy, and is generally called as a high-voltage electrical appliance with the voltage of more than 3 kV.

The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power line, the motor and the like, automatically cutting off the circuit when serious overload, short circuit, undervoltage and other faults occur, has the function equivalent to the combination of a fuse type switch, an over-under-heating relay and the like, and generally does not need to change parts after breaking fault current.

The circuit breaker generally comprises a contact system, an arc extinguishing system, an operating mechanism, a release, a shell and the like, wherein when a short circuit occurs, a magnetic field generated by a large current (generally 10 to 12 times) overcomes a counter-force spring, the release pulls the operating mechanism to act, and a switch is tripped instantaneously. When overload occurs, the current increases, the heating value increases, and the bimetal deforms to a certain extent to push the mechanism to operate (the larger the current is, the shorter the operation time is).

The structure adopted by the current breaker is a slow-closing and fast-opening structure, namely, when the breaker is closed, the breaker can be closed at a very slow speed. The resulting structure is that the arc generated during closing is very large. Through high-speed photography measurement and calculation, the slow-closing of the slow-closing and fast-opening structure requires a closing time of hundreds of milliseconds to one second, and a large closing arc can be generated during the closing time, so that a mechanism is easy to damage.

Disclosure of Invention

The invention aims to provide a quick automatic switching-on mechanism of a circuit breaker and the circuit breaker provided with the mechanism, so as to solve the problems that a large switching-on arc is generated and the mechanism is easy to damage in the long switching-on time proposed in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the quick automatic switching-on mechanism of the circuit breaker comprises a switching-on and switching-off mechanism and a switching mechanism for controlling the switching-on and switching-off of the switching-on and switching-off mechanism, wherein the switching-on and switching-off mechanism comprises a mounting plate, a driving seat, a sliding seat, a threaded sleeve and a connecting spring for connecting the threaded sleeve and the sliding seat, and a push rod for controlling a brake contact to move is arranged at the outer side end of the sliding seat; the driving seat, the sliding seat and the threaded sleeve are all slidably mounted on the mounting plate, the sliding seat and the threaded sleeve are arranged on the opposite sides of the driving seat, and a limiting jacking block is mounted on one side, facing the driving seat, of the sliding seat; the driving seat is provided with first direction section, spacing section and second direction section towards one side of sliding seat, spacing section inwards sunken be formed with spacing kicking block shape adaptation's recess form, before the combined floodgate, spacing kicking block is located the inside of second direction section, and during the combined floodgate, switch mechanism control driving seat removes, makes spacing kicking block remove to the inside of spacing section, and connecting spring changes into the energy storage state from initial state, and then, the driving seat further removes, and spacing kicking block removes to inside the first direction section, and connecting spring releases the energy storage, and spacing kicking block has initial kinetic energy under connecting spring's promotion to the moving contact of drive kicking block and ejector pin tip removes towards the static contact fast, realizes quick combined floodgate.

As a further scheme of the invention: the second guide section, the limiting section and the first guide section are sequentially arranged along the relative sliding direction of the closing time limiting top block, a first protruding portion is formed between the first guide section and the limiting section in an outward protruding mode, and a second protruding portion is formed between the second guide section and the limiting section in an outward protruding mode.

As still further aspects of the invention: the limiting top block is connected with the sliding seat through an elastic piece.

As still further aspects of the invention: the screw sleeve is characterized in that an adjusting screw for controlling the movement of the screw sleeve and a rotating assembly for controlling the rotation of the adjusting screw are further arranged on the mounting plate, the adjusting screw is rotatably arranged on the mounting plate, a first bevel gear is fixedly arranged on the adjusting screw, the rotating assembly comprises a connecting shaft rotatably arranged on the mounting plate, a first gear and a second bevel gear which are fixedly arranged at one end of the connecting shaft, the second bevel gear is meshed with the first bevel gear, a second rack is fixedly arranged on one side, far away from the second guide section, of the driving seat, and the second rack is meshed with the first gear.

As still further aspects of the invention: the switch mechanism comprises a connecting gear and a toggle switch, wherein the connecting gear and the toggle switch are rotatably arranged, a first rack is arranged outside the driving seat, the connecting gear is meshed with the first rack, a gear ring is arranged on the toggle switch, and the gear ring is meshed with the connecting gear.

As still further aspects of the invention: still slidable mounting has on the drive seat and stirs the slider, stir the slider and be L type structure, stir the vertical section setting of slider in the outside of spacing kicking block, stir the slider and be used for driving the sliding seat through the removal of the spacing kicking block of control when breaking out the floodgate and reset.

As still further aspects of the invention: the fixed mounting has down the rack on the mounting panel, stir the bottom fixed mounting of slider and have the rack, the inside rotation of drive seat is installed the rotation axis, and fixed mounting has driving gear and driven gear on the rotation axis, and driven gear is sector gear, and it has tooth portion and smooth portion, and driving gear and lower rack meshing, driven gear and last rack meshing.

Further, the switching-on and switching-off principle of the automatic switching-on mechanism is as follows:

in the initial state, the connecting spring does not store energy, the limiting ejector block is positioned in the second guide section, the toothed part of the driven gear starts to be meshed with the upper rack, and the toggle switch rotates to the upper side; when the switch is closed, the toggle switch is rotated downwards from the upper side, the driving seat slides leftwards, the limit jacking block slides to the limit section from the second guide section, in the process, the toggle sliding block and the limit jacking block slide rightwards at the same time, the toggle switch continues to rotate to the lower side, the limit jacking block slides out of the limit section, the connecting spring starts to store energy, after the limit jacking block completely slides into the first guide section, the connecting spring stores energy and releases energy, so that the limit jacking block has initial kinetic energy, the sliding seat, the ejector rod and the moving contact move towards the fixed contact, at the moment, the toothed part of the driven gear is separated from the upper rack, the toggle sliding block moves rightwards under the drive of the limit jacking block, and when the moving contact contacts with the fixed contact, the switch-on is completed; when the switch is switched off, the toggle switch is rotated to the upper side from the lower side, the driving seat slides rightwards, the driving gear and the driven gear rotate anticlockwise, the toothed part of the driven gear is converted into a contact state from a separation state with the upper rack, the toggle sliding block is driven to slide leftwards, the toggle sliding block is driven to drive the sliding seat with the limiting jacking block to reset, in the resetting process, the first gear is contacted with the second rack, the screw sleeve is driven to reset through the rotating assembly and the adjusting screw, and the connecting spring is enabled to restore to the initial state.

The circuit breaker comprises the quick automatic switching-on mechanism of the circuit breaker, and further comprises a shell, wherein the shell comprises a shell body and a base matched with the shell body, a wiring terminal I, a wiring terminal II and a conductive metal strip are installed in the shell body, the wiring terminal I is connected with a wire inlet cable, the wiring terminal II is connected with a wire outlet cable, one end of the conductive metal strip is electrically connected with the wiring terminal I, and the other end of the conductive metal strip is electrically connected with a static contact; the inside of casing still is provided with short-circuit protection mechanism, short-circuit protection mechanism's one end is connected with the moving contact electricity, and short-circuit protection mechanism's the other end is connected with binding post II electricity, and during the combined floodgate, the moving contact contacts with the static contact, and the inside electric circuit that constitutes of circuit breaker.

As still further aspects of the invention: the short-circuit protection mechanism comprises an electromagnetic coil, an iron core and a deflector rod connected with the iron core, wherein a lug matched with the deflector rod is arranged on the driving seat, when in short circuit, the current of an electrified loop is increased, the electromagnetic coil drives the iron core to move, the deflector rod drives the lug to move, and then the driving seat is driven to move, so that the circuit breaker is converted into a brake-separating state from a brake-closing state.

Compared with the prior art, the invention has the beneficial effects that: the invention is provided with a switching-on/off mechanism in the circuit breaker, the switching-on/off mechanism comprises a mounting plate, a driving seat, a sliding seat, a threaded sleeve and a connecting spring for connecting the threaded sleeve and the sliding seat, the driving seat is provided with a first guide section, a limiting section and a second guide section, the outer side end of the sliding seat is provided with a push rod for controlling the movement of a brake contact, when the switching-on is performed, the switching mechanism controls the driving seat to move, so that a limiting push block moves into the limiting section, the connecting spring is converted into an energy storage state from an initial state, then, the driving seat further moves, the limiting push block moves into the first guide section, the connecting spring releases energy storage, and the limiting push block has initial kinetic energy under the pushing of the connecting spring, so that a moving contact at the end of the push rod and the push rod moves towards a fixed contact, the rapid switching-on is realized, the contact time of the moving contact and the fixed contact is shortened, and large switching-on generated in long switching-on time is avoided, so that the service life of the circuit breaker is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of a quick automatic closing mechanism of a circuit breaker;

fig. 2 is a schematic diagram of a first structure of an opening and closing mechanism in a quick automatic closing mechanism of a circuit breaker;

fig. 3 is a schematic diagram II of a switching mechanism in the quick automatic switching mechanism of the circuit breaker;

fig. 4 is a schematic structural view of a quick automatic closing mechanism of the circuit breaker in a breaking state;

fig. 5 is a schematic structural diagram of the quick automatic switching-on mechanism Zhong Bodong of the circuit breaker when the switch is toggled;

fig. 6 is a schematic structural diagram of a quick automatic closing mechanism of the circuit breaker in a closing state;

fig. 7 is a schematic structural diagram of a sliding control mechanism in the quick automatic closing mechanism of the circuit breaker;

fig. 8 is an enlarged partial schematic view at a in fig. 7.

In the figure: 10-shell, 11-shell, 12-base, 13-incoming cable, 14-outgoing cable, 15-binding post I, 16-binding post II, 17-conductive metal strip, 171-static contact, 18-toggle switch and 19-connecting gear; the switching-on/off mechanism comprises a switching-on/off mechanism, a 21-driving seat, a 211-first rack, a 212-through groove, a 213-first guide section, a 214-limit section, a 215-second guide section, a 216-second rack, a 22-sliding seat, a 221-limit jacking block, a 222-ejector rod, a 23-connecting spring, a 24-screw sleeve, a 25-adjusting screw, a 251-first bevel gear, a 26-rotating component, a 261-rotating shaft, a 262-first gear, a 263-second bevel gear, a 27-toggle sliding block and a 28-moving contact; a short circuit protection mechanism; 40-sliding control mechanism, 41-lower rack, 42-upper rack, 43-driving gear, 44-driven gear.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

It is noted that various aspects of the embodiments are described below within the scope of the following claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present disclosure, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such apparatus may be implemented and/or such methods practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should be understood that although the terms first, second, etc. may be used in embodiments of the present invention to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another.

1-8, in the embodiment of the present invention, a quick automatic switching mechanism of a circuit breaker includes a switching mechanism 20 and a switching mechanism for controlling the switching mechanism 20 to switch on and off, where the switching mechanism 20 includes a mounting plate, a driving seat 21, a sliding seat 22, a threaded sleeve 24, and a connecting spring 23 for connecting the threaded sleeve 24 and the sliding seat 22, and an ejector rod 222 for controlling the movement of a brake contact 28 is installed at an outer end of the sliding seat 22, and it is understood that, a fixed contact 171 corresponding to the movable contact 28 is disposed at an opposite side of the movable contact 28, and during switching on, the ejector rod 222 controls the movable contact 28 to move toward the fixed contact 171 until contacting the fixed contact 171, and during switching off, the ejector rod 222 controls the movable contact 28 to move away from the fixed contact 171; in the embodiment of the present invention, the driving seat 21, the sliding seat 22 and the threaded sleeve 24 are all slidably mounted on the mounting plate, the sliding seat 22 and the threaded sleeve 24 are disposed on opposite sides of the driving seat 21, and a limiting top block 221 is mounted on a side of the sliding seat 22 facing the driving seat 21; the driving seat 21 is provided with a first guide section 213, a limit section 214 and a second guide section 215 towards one side of the sliding seat 22, the limit section 214 is inwards recessed to form a groove shape matched with the limit jacking block 221, before closing, the limit jacking block 221 is positioned in the second guide section 215, during closing, the switching mechanism controls the driving seat 21 to move, the limit jacking block 221 moves to the inside of the limit section 214, the connecting spring 23 is converted into an energy storage state from an initial state, then the driving seat 21 moves further, the limit jacking block 221 moves to the inside of the first guide section 213, the connecting spring 23 releases energy storage, the limit jacking block 221 has initial kinetic energy under the pushing of the connecting spring 23, and therefore the movable contact 28 at the end parts of the ejector rod 222 is driven to move towards the fixed contact 171 rapidly, and rapid closing is realized; further, the second guiding section 215, the limiting section 214 and the first guiding section 213 are sequentially arranged along the relative sliding direction of the limiting top block 221 during closing, and a first protrusion is formed between the first guiding section 213 and the limiting section 214 by protruding outwards, and a second protrusion is formed between the second guiding section 215 and the limiting section 214 by protruding outwards, which is to be understood that the purpose of the arrangement of the first protrusion and the second protrusion is to form a groove-shaped limiting section, and the first protrusion and the second protrusion can connect the first guiding section 213 with the limiting section 214 and the second guiding section 215 with the limiting section 214, so that the relative sliding of the limiting top block 221 is smoother; in order to make the limiting top block 221 relatively slide along the second guide section 215, the limiting section 214 and the first guide section 213, the limiting top block 221 is connected with the sliding seat 22 through an elastic member, the elastic member may be a spring, it is understood that the limiting top block 221 and the sliding seat 22 do not have active sliding capability, and the driving seat 21 slides under the control of the switch mechanism, so that the limiting top block 221 slides relative to the driving seat 21, during closing, the driving seat 21 slides leftwards (taking fig. 2 as an example), the limiting top block 221 relatively slides rightwards, and sequentially passes through the second guide section 215, the limiting section 214 and the first guide section 213, when the limiting top block 221 is located in the second guide section 215, the connecting spring 23 is in an initial state, after the limiting top block 221 slides into the limiting section 214, the limiting top block 221 drives the limiting top block 221 and the sliding seat 22 leftwards, the connecting spring 23 is compressed, and is converted into an energy storage state from the initial state, after the connecting spring 23 is compressed to a maximum value, the driving seat 21 continues to slide leftwards, the limiting top block 221 and the limiting top block 214 is separated from the limiting top block 214 and enters the first guide section 213, and then the limiting top block 21 is converted into an energy storage state, and the first guide section 213 is quickly moved from the first guide section 213, and the sliding seat 22 is quickly released, and the sliding top block is connected to the sliding seat 22; in the embodiment of the present invention, in order to enable the connection spring 23 to be converted from the initial state to the energy storage state, an adjusting screw 25 for controlling the movement of the screw housing 24 and a rotating assembly 26 for controlling the rotation of the adjusting screw 25 are further installed on the mounting plate, the adjusting screw 25 is rotatably installed on the mounting plate, a first bevel gear 251 is fixedly installed on the adjusting screw 25, the rotating assembly includes a connection shaft rotatably installed on the mounting plate, a first gear 262 and a second bevel gear 263 fixed at one end of the connection shaft, the second bevel gear 263 is engaged with the first bevel gear 251, a second rack 216 is fixedly installed at a side of the driving seat 21 remote from the second guide section 215, as shown in fig. 3, the second rack 216 is engaged with the first gear 262, the second rack 216 drives the first gear 262 to rotate when the driving seat 21 slides left, the first gear 262 drives the connecting shaft and the second bevel gear 263 to synchronously rotate, the second bevel gear 263 drives the first bevel gear 251 and the adjusting screw 25 to synchronously rotate, and then the screw sleeve 24 is controlled to slide on the mounting plate, it can be understood that before closing, the limiting top block 221 is positioned in the second guide section 215, during closing, the driving seat 21 slides leftwards, the second rack 216 drives the first gear 262 to start rotating, the adjusting screw 25 controls the screw sleeve 24 to slide rightwards, at this moment, the screw sleeve 24 pushes the sliding seat 22 to slide rightwards through the connecting spring 23, the connecting spring 23 is in a micro-compression state, after the limiting top block 221 enters the limiting section 214, the second rack 216 is separated from the first gear 262, the screw sleeve 24 keeps unchanged position under the limit action of the threads of the adjusting screw 25, the driving seat 21 drives the sliding seat 22 to slide leftwards, the distance between the sliding seat 22 and the screw sleeve 24 is reduced, the connecting spring 23 is gradually compressed, thereby converting from the initial state to the stored energy state; it should be noted that, since the opening is the reverse action of closing, during opening, the driving seat 21 slides rightward until the limiting top block 221 slides into the second guiding section 215, and the connecting spring 23 returns to the initial state, so by providing the threaded sleeve 24, the adjusting screw 25 and the rotating assembly 26, the adjusting spring 23 can maintain the initial state during opening, avoiding the spring 23 from being damaged due to the long-term compression state, and increasing the service life of the connecting spring 23 and the opening and closing mechanism 20.

In addition, in the embodiment of the present invention, the switch mechanism includes a connecting gear 19 and a toggle switch 18 that are rotatably disposed, a first rack 211 is disposed outside the driving seat 21, the connecting gear 19 is meshed with the first rack 211, a gear ring is disposed on the toggle switch 18, the gear ring is meshed with the connecting gear 19, the toggle switch 18 is manually controlled to rotate, the gear ring drives the connecting gear 19 to rotate, and then the driving seat 21 with the first rack 211 is controlled to slide on a mounting plate, so as to control the switching on and off of the switching mechanism 20.

As shown in fig. 2-3, the driving seat 21 is further slidably provided with a toggle slider 27, where the toggle slider 27 has an L-shaped structure, a vertical section of the toggle slider 27 is disposed at an outer side of the limit jack 221, and the toggle slider 27 is configured to drive the sliding seat 22 to reset by controlling movement of the limit jack 221 during opening, and it should be noted that the limit jack 221 should have a certain height so that the toggle slider 27 can contact with the limit jack 221; further, as shown in fig. 7 to 8, a lower rack 41 is fixedly installed on the mounting plate, an upper rack 42 is fixedly installed at the bottom of the toggle slider 27, a rotating shaft is rotatably installed in the driving seat 21, a driving gear 43 and a driven gear 44 are fixedly installed on the rotating shaft, the driven gear 44 is a sector gear, the sector gear has a tooth part and a smooth part, the driving gear 43 is meshed with the lower rack 41, and the driven gear 44 is meshed with the upper rack 42; in the initial state, the toothed part of the driven gear 44 starts to be meshed with the upper rack 42, the driving seat 21 slides leftwards during closing, the driving gear 43 and the driven gear 44 rotate clockwise, the driven gear 44 drives the upper rack 42 to move rightwards, and at the moment, the sliding block 27 and the limiting jacking block 221 are shifted to slide rightwards; when the limiting top block 221 enters the first guide section 213, the toothed part of the driven gear 44 is separated from the upper rack 42, the limiting top block 221 has initial kinetic energy at the moment to drive the upper rack 42 and the toggle slider 27 to slide rightwards, and when the limiting top block 221, the upper rack 42 and the toggle slider 27 slide rightwards to the rightmost end, the moving contact 28 is in contact with the fixed contact 171, closing is completed, and at the moment, the toothed part of the driven gear 44 is kept separated from the upper rack 42; when the brake is released, the driving seat 21 slides rightwards, the driving gear 43 and the driven gear 44 rotate anticlockwise, the toothed part of the driven gear 44 and the upper rack 42 are converted into a contact state from a separation state, the toggle sliding block 27 is driven to slide leftwards, and the toggle sliding block 27 is further driven to reset the sliding seat 22 with the limiting jacking block 221.

Referring to fig. 4-6, fig. 4 is a schematic structural diagram of an automatic closing mechanism in an initial state (a brake-separating state), fig. 5 is a schematic structural diagram of the automatic closing mechanism from the initial state to the brake-closing state, fig. 6 is a schematic structural diagram of the automatic closing mechanism in the brake-closing state, and the brake-closing and brake-separating principles of the automatic closing mechanism are described in conjunction with fig. 4-6, and the specific principles are as follows:

in the initial state, the connecting spring 23 does not store energy, the limiting ejector block 221 is positioned in the second guide section 215, the toothed part of the driven gear 44 starts to be meshed with the upper rack 42, and the toggle switch 18 rotates to the upper side as shown in fig. 4; when the switch is closed, the toggle switch 18 is rotated downwards from the upper side, the driving seat 21 slides leftwards, the limiting ejector block 221 slides to the limiting section 214 from the second guiding section 215, in the process, the toggle sliding block 27 and the limiting ejector block 221 slide rightwards simultaneously, as shown in fig. 5, the toggle switch 18 continues to rotate to the lower side, the limiting ejector block 221 slides out of the limiting section 214, the connecting spring 23 starts to store energy, after the limiting ejector block 221 slides into the first guiding section 213 completely, the connecting spring 23 stores energy and releases the energy, so that the limiting ejector block 221 has initial kinetic energy, the sliding seat 22, the ejector rod 222 and the movable contact 28 are driven to move towards the fixed contact 171, at this time, the toothed part of the driven gear 44 is separated from the upper rack 42, the toggle sliding block 27 moves rightwards under the driving of the limiting ejector block 221, and when the movable contact 28 contacts the fixed contact 171, as shown in fig. 6, the switch is closed; during opening, the toggle switch 18 is rotated from the lower side to the upper side, the driving seat 21 slides rightwards, the driving gear 43 and the driven gear 44 rotate anticlockwise, the toothed part of the driven gear 44 and the upper rack 42 are converted into a contact state from a separation state, the toggle sliding block 27 is driven to slide leftwards, the toggle sliding block 27 is further driven to reset the sliding seat 22 with the limiting jacking block 221, in the resetting process, the first gear 262 is contacted with the second rack 216, the swivel assembly 26 and the adjusting screw 25 drive the screw sleeve 24 to reset, and the connecting spring 23 is enabled to restore to the initial state.

As shown in fig. 1 and fig. 4, the invention also discloses a circuit breaker, the circuit breaker comprises a shell 10 and the quick automatic switching-on mechanism of the circuit breaker, the shell 10 comprises a shell 11 and a base 12 matched with the shell 11, a wiring terminal i 15, a wiring terminal ii 16 and a conductive metal strip 17 are installed in the shell 11, the wiring terminal i 15 is connected with an incoming cable 13, the wiring terminal ii 16 is connected with an outgoing cable 14, one end of the conductive metal strip 17 is electrically connected with the wiring terminal i 15, and the other end of the conductive metal strip 17 is electrically connected with a fixed contact 171; the inside of the shell 11 is also provided with a short-circuit protection mechanism 30, one end of the short-circuit protection mechanism 30 is electrically connected with the movable contact 28, the other end of the short-circuit protection mechanism 30 is electrically connected with the wiring terminal II 16, the movable contact 28 is contacted with the fixed contact 171 when the switch is closed, and a power-on loop is formed inside the circuit breaker; further, in the embodiment of the present invention, the short-circuit protection mechanism 30 includes an electromagnetic coil, an iron core, and a shift lever connected to the iron core, the driving seat 21 is provided with a bump matched with the shift lever, when in short circuit, the current of the energizing circuit is increased, the electromagnetic coil drives the iron core to move, and the shift lever drives the bump to move, so as to drive the driving seat 21 to move, and the circuit breaker is converted from a closing state to a separating state.

In summary, the opening and closing mechanism is disposed in the circuit breaker according to the present invention, the opening and closing mechanism includes a mounting plate, a driving seat 21, a sliding seat 22, a threaded sleeve 24, and a connecting spring 23 connecting the threaded sleeve 24 and the sliding seat 22, the driving seat is provided with a first guiding section 213, a limiting section 214, and a second guiding section 215, the outer end of the sliding seat 22 is provided with a push rod 222 controlling the movement of the braking contact 28, during closing, the switching mechanism controls the driving seat 21 to move, so that the limiting push block 221 moves into the limiting section 214, the connecting spring 23 is converted from an initial state into an energy storage state, then, the driving seat 21 moves further, the limiting push block 221 moves into the first guiding section 213, the connecting spring 23 releases energy storage, the limiting push block 221 has initial kinetic energy under the pushing of the connecting spring, thereby driving the moving contact 28 at the ends of the push rod 222 and the push rod 222 to move rapidly towards the fixed contact 171, thereby realizing rapid closing, shortening the contact time of the moving contact 28 and the fixed contact 171, avoiding the long-time generated large closing, and thus improving the service life of the circuit breaker.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides a quick automatic closing mechanism of circuit breaker, its characterized in that includes divide-shut brake mechanism (20) and control divide-shut brake mechanism (20) combined floodgate and opening and closing's switch mechanism, divide-shut brake mechanism (20) include: a mounting plate; the driving seat (21) is slidably mounted on the mounting plate, the driving seat (21) is provided with a first guide section (213), a limiting section (214) and a second guide section (215), and the limiting section (214) is inwards recessed to form a groove shape matched with the shape of the limiting top block (221); the sliding seat (22) is slidably arranged on the mounting plate, a push rod (222) for controlling the brake contact (28) to move is arranged at the outer side end of the sliding seat (22), the limiting top block (221) is arranged at one side of the sliding seat (22) facing the driving seat (21), the limiting top block (221) is positioned in the second guide section (215) before closing, and when closing, the switching mechanism controls the driving seat (21) to move so as to drive the limiting top block (221) to move and sequentially pass through the limiting section (214) and the first guide section (213); the screw sleeve (24) is slidably arranged on the mounting plate, the screw sleeve (24) is connected with the sliding seat (22) through the connecting spring (23), the connecting spring (23) is firstly converted into an energy storage state from an initial state when in closing, then energy storage is released, and the limiting ejector block (221), the ejector rod (222) and the movable contact (28) at the end part of the ejector rod (222) are pushed to rapidly move towards the fixed contact (171).

2. The quick automatic closing mechanism of a circuit breaker according to claim 1, wherein the second guiding section (215), the limiting section (214) and the first guiding section (213) are sequentially arranged along the relative sliding direction of the limiting top block (221) during closing, a first protruding portion is formed between the first guiding section (213) and the limiting section (214) in an outward protruding manner, and a second protruding portion is formed between the second guiding section (215) and the limiting section (214) in an outward protruding manner.

3. The quick automatic closing mechanism of a circuit breaker according to claim 2, characterized in that the limit jack (221) is connected with the sliding seat (22) through an elastic member.

4. The quick automatic closing mechanism of a circuit breaker according to claim 3, wherein an adjusting screw (25) for controlling the movement of the screw sleeve (24) and a rotating assembly (26) for controlling the rotation of the adjusting screw (25) are further installed on the installation plate, the adjusting screw (25) is rotatably installed on the installation plate, a first bevel gear (251) is fixedly installed on the adjusting screw (25), the rotating assembly comprises a connecting shaft rotatably installed on the installation plate, a first gear (262) and a second bevel gear (263) fixed at one end of the connecting shaft, the second bevel gear (263) is meshed with the first bevel gear (251), a second rack (216) is fixedly installed on one side, far away from the second guide section (215), of the driving seat (21), and the second rack (216) is meshed with the first gear (262).

5. The quick automatic switching-on mechanism of a circuit breaker according to claim 1, characterized in that the switching mechanism comprises a connecting gear (19) and a toggle switch (18) which are rotatably arranged, a first rack (211) is arranged outside the driving seat (21), the connecting gear (19) is meshed with the first rack (211), a gear ring is arranged on the toggle switch (18), and the gear ring is meshed with the connecting gear (19).

6. The quick automatic switching-on mechanism of a circuit breaker according to claim 1, wherein the driving seat (21) is further provided with a poking sliding block (27) in a sliding manner, the poking sliding block (27) is of an L-shaped structure, a vertical section of the poking sliding block (27) is arranged on the outer side of the limiting top block (221), and the poking sliding block (27) is used for driving the sliding seat (22) to reset by controlling the movement of the limiting top block (221) during switching-off.

7. The quick automatic closing mechanism of a circuit breaker according to claim 6, characterized in that a lower rack (41) is fixedly installed on the mounting plate, an upper rack (42) is fixedly installed at the bottom of the toggle sliding block (27), a rotating shaft is rotatably installed inside the driving seat (21), a driving gear (43) and a driven gear (44) are fixedly installed on the rotating shaft, the driven gear (44) is a sector gear which is provided with a tooth part and a smooth part, the driving gear (43) is meshed with the lower rack (41), and the driven gear (44) is meshed with the upper rack (42).

8. The circuit breaker comprises the quick automatic switching-on mechanism of the circuit breaker according to any one of claims 1-7, and further comprises a shell (10), wherein the shell (10) comprises a shell (11) and a base (12) matched with the shell (11), a wiring terminal I (15), a wiring terminal II (16) and a conductive metal strip (17) are installed in the shell (11), the wiring terminal I (15) is connected with an incoming cable (13), the wiring terminal II (16) is connected with an outgoing cable (14), one end of the conductive metal strip (17) is electrically connected with the wiring terminal I (15), and the other end of the conductive metal strip (17) is electrically connected with a fixed contact (171); the circuit breaker is characterized in that a short-circuit protection mechanism (30) is further arranged in the shell (11), one end of the short-circuit protection mechanism (30) is electrically connected with the moving contact (28), the other end of the short-circuit protection mechanism (30) is electrically connected with the wiring terminal II (16), and when the circuit breaker is closed, the moving contact (28) is contacted with the fixed contact (171), and an electrified loop is formed inside the circuit breaker.

9. The circuit breaker according to claim 8, wherein the short-circuit protection mechanism (30) comprises an electromagnetic coil, an iron core and a deflector rod connected with the iron core, the driving seat (21) is provided with a convex block matched with the deflector rod, when the circuit breaker is in short circuit, the current of the energizing circuit is increased, the electromagnetic coil drives the iron core to move, the deflector rod drives the convex block to move, and the driving seat (21) is driven to move, so that the circuit breaker is converted into a switching-off state from a switching-on state.