CN218333670U

CN218333670U - Mechanical switch device of circuit breaker

Info

Publication number: CN218333670U
Application number: CN202222539367.3U
Authority: CN
Inventors: 李军; 王光; 黄正乾
Original assignee: Shenzhen Taiyong Electric Co ltd
Current assignee: Shenzhen Taiyong Electric Co ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2023-01-17
Anticipated expiration: 2032-09-26

Abstract

The utility model provides a mechanical switch device of a circuit breaker, which comprises a shell, a handle, an upper lock catch, a first torsion spring, a static contact, a contact system, a connecting rod, a button, a lower lock catch and a second torsion spring; the shell is internally provided with a first mounting column, a second mounting column and a sliding chute; the right end of the handle is rotatably connected to the first mounting column; the upper lock catch is fixed at the right end of the handle; the first torsion spring is sleeved on the first mounting column; the static contact is arranged in the shell and positioned on the right side of the chute; the contact system is arranged in the sliding chute; two ends of the connecting rod are respectively and rotatably connected to the upper lock catch and the contact system; the lower lock catch is connected to the second mounting column and can be mutually locked with the hook surface of the upper lock catch; a push plate is arranged at the rear side of the lower lock catch; the button is arranged below the handle, and the right end of the button is opposite to the push plate; the second torsion spring is sleeved on the second mounting column. The utility model discloses compare in traditional switching mechanism, the structure is simpler, and the wearing and tearing of mechanism divide-shut brake, dropout are minimum or do not have, and mechanical life is better, and whole mechanism performance is more reliable.

Description

Mechanical switch device of circuit breaker

Technical Field

The utility model belongs to the technical field of low-voltage apparatus, concretely relates to circuit breaker mechanical switch device.

Background

The traditional plug-in circuit breaker is complex in mechanism, more in related parts, high in requirements on the size and the process of the parts, large in required internal space, easy to break down and low in reliability. And the traditional circuit breaker is broken under the condition of larger short-circuit current, has larger electric arc and is limited in application scenes. Therefore, in order to solve the existing situation, a new mechanical switch device of the circuit breaker needs to be designed, the energy generated by connection and disconnection is carried through the solid-state switch, and the mechanical switch of the circuit breaker body is only used for isolation and does not need to carry the energy generated by connection and disconnection.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, an object of the present invention is to provide a mechanical switch device for a circuit breaker, which has a simple structure, convenient operation and reliable performance.

The utility model aims at realizing through the following technical scheme:

a mechanical switching device for a circuit breaker, comprising a hollow casing as a load-bearing substrate, characterized in that: the device also comprises a handle, an upper lock catch, a first torsion spring, a static contact, a contact system, a connecting rod, a button, a lower lock catch and a second torsion spring; the shell is internally provided with a first mounting column, a second mounting column and a sliding groove; the first mounting column is vertically arranged on the left side of the shell, the sliding groove is transversely arranged on the left side of the first mounting column, and the second mounting column is vertically arranged below the sliding groove; the right end of the handle is rotatably connected to the first mounting column, and the left end of the handle extends out of the shell leftwards; the upper lock catch is fixed at the right end of the handle and is hook-shaped, and the hook surface of the upper lock catch faces to the clockwise rotation direction of the handle; the first torsion spring is sleeved on the first mounting column and is provided with two rotating arms, the rotating arm on the left side of the first torsion spring is clamped on the inner wall of the shell, and the rotating arm on the right side of the first torsion spring is clamped on the upper lock catch and can push the upper lock catch to rotate clockwise in an energy storage state; the static contact is arranged in the shell and positioned on the right side of the chute; the contact system is arranged in the sliding chute and can do linear motion along the sliding chute, so that the contact system is contacted with or separated from the static contact, and the breaker is opened or closed; two ends of the connecting rod are respectively and rotatably connected to the upper lock catch and the contact system; the lower lock catch is transversely and rotatably connected to the second mounting column and positioned below the handle and the contact system, the left end of the lower lock catch is in a hook shape, and the hook surface of the lower lock catch faces upwards and can be mutually locked with the hook surface of the upper lock catch; a push plate is arranged on the rear side of the lower lock catch, the left side surface of the push plate inclines from the lower left side to the upper right side, and the lower end of the push plate exceeds the lower side of the lower lock catch; the button is transversely arranged below the handle in a left-right moving mode and positioned on the rear side of the lower lock catch, the left end of the button is positioned outside the shell, and the right end of the button is over against the lower end of the left side of the push plate; the push button is pressed rightwards, and the push plate can be pushed by the push button to rotate and drive the lower lock catch to rotate anticlockwise to be disengaged from the upper lock catch; the second torsion spring is sleeved on the second mounting column and provided with two rotating arms, the rotating arm on the right side of the second torsion spring is clamped on the inner wall of the shell, and the rotating arm on the left side of the second torsion spring is clamped on the position, on the left side of the second mounting column, of the lower lock catch and can push the lower lock catch to rotate clockwise in an energy storage state.

Furthermore, a limiting surface for limiting the handle to excessively rotate anticlockwise is arranged on the left side of the shell.

Furthermore, the contact system comprises a contact support, a moving contact, a contact spring and a poke rod; the contact support is slidably arranged in the sliding groove and can do linear motion along the sliding groove, the bottom of the contact support is concave upwards to form a transverse installation groove, and the left side of the contact support is rotatably connected with the right end of the first connecting rod; the moving contact is arranged in the mounting groove in a sliding manner, the right end of the moving contact extends out of the mounting groove, and the moving contact can move linearly towards the direction close to or far away from the static contact under the driving of the contact support, so that the moving contact is attached to or separated from the static contact; the contact spring is arranged in the mounting groove and sleeved on the left end of the moving contact, the left end of the contact spring is propped against the contact support, and the right end of the contact spring is propped against the left side of the moving contact; the left end of the poking rod is fixed on the contact support, and the right end of the poking rod drives the breaker to open or close.

Furthermore, a limit groove is symmetrically arranged on the front side and the rear side of the mounting groove supported by the contact respectively; and the movable contact is provided with a limiting bulge which can slide left and right in the limiting groove corresponding to the two limiting grooves.

Furthermore, the surface of the upper lock catch, which is far away from the handle, is an inclined surface; the surface of the lower lock catch facing the handle is an inclined plane, so that when the switch is switched on, after the handle drives the upper lock catch to rotate anticlockwise, the surface of the upper lock catch, far away from the handle, can slide on the surface of the lower lock catch facing the handle, the hook surface of the upper lock catch can be buckled on the hook surface of the lower lock catch, and the hasp of the upper lock catch and the lower lock catch is realized.

Furthermore, the left half part of the button is cylindrical, the right half part of the button is conical, the diameter of the left end of the right half part is larger than that of the left half part, and a guide hole matched with the left half part of the button is formed in the shell corresponding to the left half part of the button; meanwhile, the left end of the button is provided with a pressing head with the diameter larger than the left half part of the button

Furthermore, the mechanical switch device of the circuit breaker also comprises a release, wherein the release comprises a shell, a movable iron core, a static iron core, a coil, a mandril and a reset spring; the shell is arranged in the shell and is positioned on the lower side of the right end of the lower lock catch, and the left end of the shell is opened and faces to the lower side surface of the right end of the lower lock catch; the static iron core is a cylinder fixed on the upper side in the shell and communicated with the shell opening; the movable iron core is a cylinder which is arranged at the lower side in the shell and can slide in the shell; the coil is wound outside the shell; the ejector rod is positioned in the shell, two ends of the ejector rod are respectively sleeved in the movable iron core and the static iron core and can move up and down in the static iron core, and the lower end of the ejector rod is fixed in the movable iron core and can move up and down under the driving of the movable iron core; the reset spring is sleeved outside the ejector rod and positioned between the movable iron core and the static iron core, and the diameter of the reset spring is larger than the inner diameter of the movable iron core; after the coil is electrified, the movable iron core and the static iron core generate magnetic force which is mutually attracted, the movable iron core overcomes the elasticity of the reset spring and moves towards the direction of the static iron core and pushes the ejector rod to extend upwards out of the shell, and then the lower lock catch is pushed upwards to rotate anticlockwise, so that the upper lock catch and the lower lock catch are disengaged, and the plug-in circuit breaker is switched off; after the coil is powered off, the movable iron core and the static iron core lose magnetic force, and the movable iron core can move downwards under the action of the reset spring and drive the ejector rod to retract into the shell again.

Further, still be provided with the protective sheath of wrapping up coil and casing in it outside the casing, the protective sheath upper end is equipped with the opening that supplies the ejector pin to upwards stretch out.

The utility model discloses a structure is different with traditional cubical switchboard mechanism, compares in traditional cubical switchboard mechanism, and the structure is simpler, and the wearing and tearing of mechanism divide-shut brake, dropout are minimum or do not, and mechanical life is better, and whole mechanism performance is more reliable.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a mechanical switching device of a circuit breaker according to the present invention;

FIG. 2 is a front view of FIG. 1;

fig. 3 is a schematic structural diagram of a housing in the mechanical switching device of the circuit breaker according to the present invention;

fig. 4 is a diagram showing a positional relationship between a button and a push plate on a lower latch of a mechanical switch device of a circuit breaker according to the present invention;

fig. 5 is a schematic structural diagram of a contact system in a mechanical switching device of a circuit breaker according to the present invention;

fig. 6 is a schematic structural diagram of a trip unit in the mechanical switching device of the circuit breaker according to the present invention;

shown in the figure: 1-shell, 2-handle, 3-upper lock catch, 4-first torsion spring, 5-second torsion spring, 6-connecting rod, 7-lower lock catch, 8-release, 9-contact system, 10-static contact, 11-button and 12-microswitch.

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the structure, proportion, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by the people skilled in the art, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial technical significance, and the modification of any structure, the change of the proportion relation or the adjustment of the size should still fall within the scope which can be covered by the technical content disclosed in the present invention without affecting the efficacy which can be generated by the present invention and the purpose which can be achieved by the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be considered as the scope of the present invention without substantial changes in the technical content.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

as shown in fig. 1-6, the mechanical switch device of circuit breaker of the present invention comprises a housing 1, a handle 2, an upper latch 3, a first torsion spring 4, a static contact 10, a contact system 9, a connecting rod 6, a button 11, a lower latch 7, and a second torsion spring 5. The mechanical switch device of the circuit breaker is matched with a PCB (printed circuit board), an MCU (microprogrammed control unit) singlechip, a microswitch 12 and a solid-state switch which are arranged in an intelligent circuit breaker shell for use. The micro switch 12 is arranged on the PCB and positioned on the right side of the contact system 9, and the micro switch 12 is linked with the contact system 9 and used for sending a switching-on/off signal to the MCU singlechip; the solid-state switch is arranged in the shell 1 and used for connecting or disconnecting the wire inlet and outlet terminal under the control of the MCU singlechip to switch on or switch off the plug-in circuit breaker.

As shown in fig. 1-3, the housing 1 is a carrying base for each component inside the circuit breaker, and the housing 1 has a first mounting post 1a, a second mounting post 1b, and a chute 1c (as shown in fig. 3). The first mounting column 1a is vertically arranged on the left side of the shell 1, the sliding groove 1c is transversely arranged on the left side of the first mounting column 1a, and the second mounting column 1b is vertically arranged below the sliding groove 1c (left side). A limiting surface 1d for limiting the handle 2 to rotate anticlockwise excessively is arranged on the left side of the shell 1.

As shown in fig. 1-3, the right end of the handle 2 is rotatably connected to the first mounting post 1a, the left end of the handle 2 extends to the left outside the housing 1, the right end of the handle 2 is cylindrical and rotatably sleeved on the first mounting post 1a, the left end of the handle 2 is pulled up and down, and the handle 2 can rotate around the first mounting post 1 a.

As shown in fig. 1, the upper lock catch 3 is fixed at the right end of the handle 2 and is hook-shaped, and the hook surface (hasp surface) thereof faces the clockwise rotation direction of the handle 2 and can rotate around the first mounting post 1a along with the right end of the handle 2.

As shown in fig. 1, the first torsion spring 4 is sleeved on the first mounting post 1a and has two rotating arms (in a V shape), the rotating arm on the left side is clamped on the inner wall of the housing 1, and the rotating arm on the right side is clamped on the upper lock catch 3 and can push the upper lock catch 3 to rotate clockwise in the energy storage state.

As shown in fig. 1-3, the stationary contact 10 is disposed inside the housing 1 and located at the right side of the chute 1c, and the left contact thereof is collinear with the movable contact 9 b.

As shown in fig. 1, 2, and 5, the contact system 9 is installed in the chute 1c and can move linearly along the chute 1c, so that the contact system 9 is in contact with or separated from the stationary contact 10, and the circuit breaker is opened or closed.

As shown in fig. 5, the contact system 9 includes a contact support 9a, a movable contact 9b, a contact spring 9c, and a toggle rod 9d.

The contact support 9a is slidably mounted in the chute 1c and can move linearly along the chute 1c (the contact support 9a is a strip-shaped plate), the bottom of the contact support 9a is concave to form a transverse mounting groove 9e, and the left side of the contact support 9a is rotatably connected with the right end of the connecting rod 6 through a hole arranged on the left side of the contact support. A limiting groove 9f is symmetrically arranged at the front side and the rear side of the mounting groove 9e of the contact support 9a respectively.

The movable contact 9b is slidably mounted in the mounting groove 9e, and the right end of the movable contact extends out of the mounting groove 9e (the right side of the movable contact is in sliding fit with the mounting groove 9e, and the left side of the movable contact is thinned into a long strip shape or a rod shape), so that the movable contact 9b can move linearly towards a direction close to or far away from the static contact 10 under the driving of the contact support 9a, and can be attached to or detached from the static contact 10. A limit protrusion 9g capable of sliding left and right in the limit groove 9f is respectively arranged on the moving contact 9b (right side) corresponding to the two limit grooves 9f, when the moving contact 9b contacts with the static contact 10 before, the limit protrusion 9g keeps contacting with the right side of the limit groove 9f under the action of the contact spring 9c, and when the contact support 9a continues to move to the right in an overtravel manner, the left side of the limit groove 9f also continues to move towards the limit protrusion 9 g. Definition of over travel: that is, when the switch is closed, since the reliability of the contact of the mechanical contact (the movable contact 9b and the fixed contact 10) is ensured, the contact support 9a continues to move rightward by a proper distance, and the mechanical contact can be reliably contacted even if the contact is worn.

The contact spring 9c is installed in the installation groove 9e and sleeved on the left end of the moving contact 9b, the left end of the contact spring 9c is propped against the contact support 9a, and the right end of the contact spring 9c is propped against the left side of the moving contact 9 b. When the moving contact 9b is contacted with the static contact 10, the contact support 9a continuously moves rightwards, the contact support 9a and the static contact 10 act together to push the moving contact 9a to compress the contact spring 9c, and the contact spring 9c stores energy.

The left end of the poke rod 9d is fixed on the contact support 9a (fixed on the right side of the top of the contact support 9a and corresponding to the position of the microswitch 12), and the right end of the poke rod is linked with the microswitch 12 to drive the breaker to open or close. When the contact support 9a slides along the sliding groove 1c, the contact support 9a drives the poke rod 9d to slide left and right, so that the poke rod 9d touches the contact of the micro switch 12, the micro switch 12 further sends a brake opening signal or a brake closing signal to the MCU singlechip, and the MCU singlechip controls the solid-state switch to be switched on or switched off, thereby realizing the switching on and off of the circuit breaker.

As shown in fig. 1, two ends of the connecting rod 6 are respectively and rotatably connected to the upper lock catch 3 and the contact system 9 (left end of the contact support 9 a), and the connecting rod 6 is a U-shaped rod.

As shown in fig. 1, the lower latch 7 is connected to the second mounting post 1b in a laterally rotatable manner and located below the handle 2 and the contact system 9, and has a hook-shaped left end, and a hook surface (a locking surface) of the lower latch 7 faces upward and can be locked with a hook surface of the upper latch 3. As shown in fig. 4, a push plate 7a is provided at the rear side of the lower lock catch 7, the left side surface of the push plate 7a is inclined from the lower left side to the upper right side, and the lower end of the push plate 7a extends beyond the lower side of the lower lock catch 7 (to ensure that the push button 11 can push the push plate 7a to rotate counterclockwise).

As shown in fig. 1 and fig. 2, the surface of the upper lock catch 3 away from the handle 3 is an inclined surface; the surface of the lower lock catch 7 facing the handle is an inclined surface, so that when the switch is switched on, after the handle 2 drives the upper lock catch 3 to rotate anticlockwise, the surface of the upper lock catch 3 far away from the handle can stably slide on the surface of the lower lock catch 7 facing the handle, the hook surface of the upper lock catch 3 can be buckled on the hook surface of the lower lock catch 7, and the hasp of the upper lock catch 3 and the lower lock catch 7 is achieved.

As shown in fig. 2 and 4, the button 11 is transversely arranged below the handle 2 in a left-right movable manner and is positioned at the rear side of the lower lock catch 7; the left end of the button 11 is positioned outside the shell 1, while the right end thereof is over against the lower end of the left side of the push plate 7a, and can push the push plate 7a to rotate anticlockwise so as to drive the lower lock catch 7 to rotate anticlockwise; when the button 11 is pressed rightwards, the button 11 can push the push plate 7a to rotate anticlockwise and drive the lower lock catch 7 to rotate anticlockwise to be disengaged from the upper lock catch 3. As shown in fig. 4, the left half of the button 11 is cylindrical, the right half is tapered (left thick and right thin), the diameter of the left end of the right half is larger than that of the left half, and a guide hole matched with the left half of the button 11 is formed in the housing 1 corresponding to the left half of the button 11, so that the button 11 can stably perform linear motion towards the push plate; meanwhile, the left end of the button 11 is provided with a pressing head with a diameter larger than that of the left half part of the button 11.

As shown in fig. 1, the second torsion spring 5 is sleeved on the second mounting post 1b and has two rotating arms (in an inverted V shape), the rotating arm on the right side is clamped on the inner wall of the housing 1, and the rotating arm on the left side is clamped on the position of the lower lock catch 7 on the left side of the second mounting post 1b and can push the lower lock catch 7 to rotate clockwise in the energy storage state.

The working principle is as follows:

manual brake opening:

as shown in fig. 1, at this time, the circuit breaker is in a closing state, the first torsion spring 4 is in an energy storage state and provides a clockwise moment (opening direction) to the handle and the upper latch, and the upper latch 3 and the lower latch 7 are buckled together; the button 11 is pressed down, the button 11 moves rightwards, pushes the push plate 7a to rotate anticlockwise, simultaneously drives the lower lock catch 7 to rotate anticlockwise, so that the lower lock catch 7 and the upper lock catch 3 are separated from each other (after the lock catch is separated, the lower lock catch 7 rotates clockwise to reset under the action of the second torsion spring 5, simultaneously the button 11 moves leftwards to reset under the pushing plate 7 a), the upper lock catch 3 rotates clockwise together with the handle 2 under the action of the elastic force of the first torsion spring 4, the connecting rod 6 is pulled to move leftwards, the connecting rod 6 moves leftwards, the contact system 9 is pulled to slide leftwards integrally, the movable contact 9b is separated from the fixed contact 10, and the circuit breaker is separated from the brake rapidly. Due to the over travel, the micro switch 12 is triggered by the poke rod 9d and sends a brake-separating signal to the MCU singlechip when the contact support 9a moves in the brake-separating direction (leftward), and the moving contact 9b and the static contact 10 are not disconnected, and the MCU singlechip receives the signal of the disconnected position of the micro switch 12 and controls the solid-state switch to be disconnected first. After the solid-state switch is disconnected, the movable contact 9b and the fixed contact 10 are disconnected (separated from contact).

Manual closing:

when the circuit breaker is in an opening state, the first torsion spring 4 is in a natural state; at this time, the driving handle 2 and the upper latch 3 rotate counterclockwise, the first torsion spring 4 compresses to store energy, the handle 2 and the upper latch 3 drive the connecting rod 6 to move rightwards, and the connecting rod 6 further pushes the whole contact system 9 to move rightwards (in a closing direction) along the chute 1c until the moving contact 9b is communicated with (in contact with) the static contact 10. Before the moving contact 9b is connected (contacted) with the static contact 10, the poke rod 9d is driven by the contact support 9a to touch the micro switch 12 on the PCB, the micro switch 12 sends a closing signal to the MCU, and the MCU receives the signal and performs delay processing (delay closing). The solid-state switch is turned on only after the moving contact 9b is turned on (contacted) with the stationary contact 10. When the handle 2 continues to move counterclockwise (compressing the first torsion spring 4), the upper latch 3 presses the left end of the lower latch 7 (the left end of the lower latch 7 moves counterclockwise against the elastic force of the second torsion spring 5, and the second torsion spring 5 compresses to store energy) and moves counterclockwise until the hook surface of the upper latch 3 is positioned on the right side of the hook surface of the lower latch 7 (meanwhile, the handle 2 is limited by the limiting surface 1d, and is difficult to drive the upper latch 3 to rotate counterclockwise), the upper latch 3 does not press the lower latch 7, the second torsion spring 5 releases energy, and pushes the lower latch 7 to rotate clockwise to reset, so that the lower latch 7 is fastened with the upper latch 3, the handle 2 is released, the handle 2 and the upper latch 3 rotate clockwise under the action of the first torsion spring, but the upper latch 3 is limited by the lower latch 7, and is difficult to rotate in one step, and the switch-on is completed (as shown in fig. 1).

Example two:

the difference between this embodiment and the first embodiment is:

in order to ensure that the plug-in circuit breaker can automatically open the brake under the conditions of overload, short circuit, overvoltage and undervoltage and the like, as shown in fig. 1 and fig. 6, the mechanical switch device of the circuit breaker further comprises a release 8, as shown in fig. 6, wherein the release 8 comprises a shell 8b, a movable iron core 8d, a static iron core 8f, a coil 8c, a push rod 8g and a reset spring 8e. The shell body 8b is also provided with a protective sleeve 8a wrapping the coil 8c and the shell body 8b in the shell body, the protective sleeve 8a is installed in the shell 1, and the upper end of the protective sleeve 8a is provided with an opening for the ejector rod 8g to extend upwards.

The shell body 8b is installed in the shell 1 and located on the lower side of the right end of the lower lock catch 7, and the left end of the shell body 8b is open and faces the lower side of the right end of the lower lock catch 7.

The static iron core 8f is a cylinder fixed on the upper side inside the housing 8b and communicated with the opening of the housing 8 b.

The movable iron core 8d is a cylinder which is arranged at the lower side inside the shell 8b and can slide in the shell 8 b.

The coil 8c is wound outside the case 8 b.

The ejector rod 8g is positioned in the shell body 8b, two ends of the ejector rod are respectively sleeved in the movable iron core 8d and the static iron core 8f and can move up and down in the static iron core 8f, and the lower end of the ejector rod 8g is fixed in the movable iron core 8d and can move up and down under the driving of the movable iron core 8 d.

The reset spring 8e is sleeved outside the ejector rod 8g and is positioned between the movable iron core 8d and the static iron core 8f, and the diameter of the reset spring is larger than the inner diameter of the movable iron core 8 d.

When emergency conditions such as overload, short circuit, overvoltage and undervoltage occur, the MCU singlechip sends a tripping signal to control the relay to switch on the coil 8c, after the coil 8c is electrified, the coil 8c generates a magnetic field, so that the movable iron core 8d and the static iron core 8f (magnetized) generate magnetic force attracting each other, the movable iron core 8d overcomes the elasticity of the reset spring 8e to move towards the direction of the static iron core 8f and push the ejector rod 8g to extend upwards out of the shell 8b, further the lower lock catch 7 is pushed upwards to rotate anticlockwise, the upper lock catch 3 and the lower lock catch 7 are tripped, the upper lock catch 3 and the handle 2 rotate clockwise under the elasticity of the first torsion spring 4, the connecting rod 6 is pulled to move leftwards, the contact system 9 is pulled to slide leftwards integrally, the movable contact 9b and the static contact 10 are separated from contact, and the circuit breaker is rapidly opened. Due to the over travel, the micro switch 12 is triggered by the poke rod 9d and generates a brake-separating signal to the MCU singlechip when the contact support 9a moves towards the brake-separating direction, at the moment, the moving contact 9b and the static contact 10 are not separated, and the MCU singlechip receives the signal of the separated position of the micro switch and controls the solid-state switch to be disconnected firstly. After the solid-state switch is turned off, the moving contact 9b and the fixed contact 10 are turned off (separated from contact).

After coil 8c outage, move iron core 8d and quiet iron core 8f and lose magnetic force, move iron core 8d and can move down and drive ejector pin 8g and withdraw casing 8b again under the effect of reset spring 8e, the hasp 7 clockwise rotation resets under the effect of second torsional spring 5 simultaneously, and button 11 moves left under push pedal 7a promotes simultaneously and resets.

It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The protection scope of the present invention is not limited to the technical solution disclosed in the specific embodiment, and all the modifications, equivalent replacements, improvements, etc. made by the technical entity of the present invention to the above embodiments all fall into the protection scope of the present invention.

Claims

1. A mechanical switching device for a circuit breaker, comprising a hollow casing as a carrying substrate, characterized in that: the device also comprises a handle, an upper lock catch, a first torsion spring, a static contact, a contact system, a connecting rod, a button, a lower lock catch and a second torsion spring;

the shell is internally provided with a first mounting column, a second mounting column and a sliding groove; the first mounting column is vertically arranged on the left side of the shell, the sliding groove is transversely arranged on the left side of the first mounting column, and the second mounting column is vertically arranged below the sliding groove;

the right end of the handle is rotatably connected to the first mounting column, and the left end of the handle extends out of the shell leftwards;

the upper lock catch is fixed at the right end of the handle and is in a hook shape, and the hook surface of the upper lock catch faces to the clockwise rotation direction of the handle; the first torsion spring is sleeved on the first mounting column and is provided with two rotating arms, the rotating arm on the left side of the first torsion spring is clamped on the inner wall of the shell, and the rotating arm on the right side of the first torsion spring is clamped on the upper lock catch and can push the upper lock catch to rotate clockwise in an energy storage state;

the static contact is arranged in the shell and positioned on the right side of the chute;

the contact system is arranged in the sliding chute and can do linear motion along the sliding chute, so that the contact system is contacted with or separated from the static contact, and the breaker is opened or closed;

two ends of the connecting rod are respectively and rotatably connected to the upper lock catch and the contact system;

the lower lock catch is transversely and rotatably connected to the second mounting column and positioned below the handle and the contact system, the left end of the lower lock catch is in a hook shape, and the hook surface of the lower lock catch faces upwards and can be mutually locked with the hook surface of the upper lock catch; a push plate is arranged on the rear side of the lower lock catch, the left side surface of the push plate inclines from the left lower part to the right upper part, and the lower end of the push plate exceeds the lower side of the lower lock catch;

the button is transversely arranged below the handle in a left-right moving mode and positioned on the rear side of the lower lock catch, the left end of the button is positioned outside the shell, and the right end of the button is over against the lower end of the left side of the push plate; the push plate can be pushed by the button to rotate and drive the lower lock catch to rotate anticlockwise to be disengaged from the upper lock catch;

the second torsion spring is sleeved on the second mounting column and is provided with two rotating arms, the rotating arm on the right side of the second torsion spring is clamped on the inner wall of the shell, and the rotating arm on the left side of the second torsion spring is clamped on the position, on the left side of the second mounting column, of the lower lock catch, and the lower lock catch can be pushed to rotate clockwise in the energy storage state.

2. A mechanical switching device for circuit breakers, according to claim 1, characterized in that: and a limiting surface for limiting the handle to excessively rotate anticlockwise is arranged on the left side of the shell.

3. A circuit breaker mechanical switching apparatus as claimed in claim 1, wherein: the contact system comprises a contact support, a moving contact, a contact spring and a poke rod;

the contact support is slidably arranged in the sliding groove and can do linear motion along the sliding groove, the bottom of the contact support is concave upwards to form a transverse installation groove, and the left side of the contact support is rotatably connected with the right end of the first connecting rod;

the moving contact is arranged in the mounting groove in a sliding manner, the right end of the moving contact extends out of the mounting groove, and the moving contact can move linearly towards the direction close to or far away from the static contact under the driving of the contact support, so that the moving contact is attached to or detached from the static contact;

the contact spring is arranged in the mounting groove and sleeved on the left end of the moving contact, the left end of the contact spring is propped against the contact support, and the right end of the contact spring is propped against the left side of the moving contact;

the left end of the poking rod is fixed on the contact support, and the right end of the poking rod drives the breaker to open or close.

4. A circuit breaker mechanical switching apparatus as claimed in claim 3, wherein: a limiting groove is symmetrically arranged on the front side and the rear side of the mounting groove supported by the contact; and a limiting bulge which can slide left and right in the limiting groove is respectively arranged on the movable contact corresponding to the two limiting grooves.

5. A circuit breaker mechanical switching apparatus as claimed in claim 1, wherein: the surface of the upper lock catch, which is far away from the handle, is an inclined surface; the surface of the lower lock catch facing the handle is an inclined surface.

6. A circuit breaker mechanical switching apparatus as claimed in claim 1, wherein: the left half part of the button is cylindrical, the right half part of the button is conical, the diameter of the left end of the right half part is larger than that of the left half part, and a guide hole matched with the left half part of the button is formed in the shell corresponding to the left half part of the button; and the left end of the button is provided with a pressing head with the diameter larger than the left half part of the button.

7. A circuit breaker mechanical switching device according to any one of claims 1 to 6 wherein: the tripper also comprises a tripper body, a movable iron core, a static iron core, a coil, a top rod and a reset spring;

the shell is arranged in the shell and is positioned on the lower side of the right end of the lower lock catch, and the left end of the shell is opened and faces to the lower side surface of the right end of the lower lock catch;

the static iron core is a cylinder fixed on the upper side in the shell and communicated with the shell opening;

the movable iron core is a cylinder which is arranged at the lower side in the shell and can slide in the shell;

the coil is wound outside the shell;

the ejector rod is positioned in the shell, two ends of the ejector rod are respectively sleeved in the movable iron core and the static iron core and can move up and down in the static iron core, and the lower end of the ejector rod is fixed in the movable iron core and can move up and down under the driving of the movable iron core;

the reset spring is sleeved outside the ejector rod and positioned between the movable iron core and the static iron core, and the diameter of the reset spring is larger than the inner diameter of the movable iron core;

after the coil is electrified, the movable iron core and the static iron core generate magnetic force which is mutually attracted, the movable iron core overcomes the elasticity of the reset spring and moves towards the direction of the static iron core and pushes the ejector rod to extend upwards out of the shell, and then the lower lock catch is pushed upwards to rotate anticlockwise, so that the upper lock catch and the lower lock catch are disengaged, and the plug-in circuit breaker is switched off;

after the coil is powered off, the movable iron core and the static iron core lose magnetic force, and the movable iron core can move downwards under the action of the reset spring and drive the ejector rod to retract into the shell again.

8. A circuit breaker mechanical switching apparatus as claimed in claim 7, wherein: the shell is also provided with a protective sleeve wrapping the coil and the shell inside, and the upper end of the protective sleeve is provided with an opening for the ejector rod to extend upwards.