CN212783220U - Single-way controlled multifunctional vacuum circuit breaker - Google Patents

Abstract

The utility model discloses a multi-functional vacuum circuit breaker of single-circuit control, vacuum switch actuating mechanism includes the vacuum cavity, install inlet wire end static contact, leading-out terminal static contact and moving contact in the vacuum cavity, the moving contact passes through hand switch and overcurrent protection mechanism's driving piece drive, vacuum switch actuating mechanism still including arranging in the vacuum cavity outside and can drive the first permanent magnet of moving contact rectilinear movement through magnetic force, hand switch and overcurrent protection mechanism's driving piece are the pivot, the pivot is passed the magnet centre bore of first permanent magnet and can be driven first permanent magnet synchronous revolution. The utility model discloses a pivot is as manual switch and overcurrent protection mechanism's driving piece, and the magnetism that utilizes first permanent magnet realizes being connected with the transmission between the moving contact in arranging the vacuum chamber in, and occupation space is littleer, is favorable to the miniaturized design and the accurate control of whole circuit breaker, is particularly useful for the logical, the disconnected control of single-phase low pressure alternating current power supply's phase line.

Description

Single-way controlled multifunctional vacuum circuit breaker

Technical Field

The utility model relates to a vacuum circuit breaker especially relates to a multi-functional vacuum circuit breaker of single circuit control.

Background

The vacuum circuit breaker is also called as a vacuum switch, is a circuit breaker with a contact arranged in a vacuum cavity, is named because arc extinguishing media and insulating media in a contact gap after arc extinguishing are high vacuum, has the advantages of small volume, light weight, suitability for frequent operation and no need of maintenance for arc extinguishing compared with an air circuit breaker (also called as an air switch), and is widely applied to high-voltage and low-voltage power distribution networks successively.

The basic structure of the vacuum circuit breaker comprises a vacuum switch actuating mechanism (comprising a vacuum cavity, a moving contact, a static contact and the like), a manual switch mechanism, an overcurrent protection unhooking (namely unhooking and hooking) mechanism and an overcurrent trigger mechanism, wherein the manual switch mechanism and the overcurrent protection unhooking mechanism are connected compactly to form a manual switch and an overcurrent protection mechanism with manual switch control and overcurrent protection automatic unhooking functions; with the advanced development of intellectualization, the existing multifunctional vacuum circuit breaker (or called as an intelligent vacuum circuit breaker) can be combined with an automatic motor mechanism such as a motor, a speed reducing mechanism, a controller and the like to realize the purpose of automatically or remotely controlling the circuit breaker to be opened and closed.

In a traditional vacuum circuit breaker, only a moving contact and a fixed contact are generally arranged in a vacuum cavity, the moving contact is driven to move by external equipment, and the moving contact is generally driven to move by a push rod to realize the contact and disconnection with the fixed contact, so that a manual switch of the traditional vacuum circuit breaker and a driving piece of an overcurrent protection mechanism are generally linearly moved push rods, and the movement direction of the push rods is axial, so that more space is required to be occupied, and the miniaturization design of the whole circuit breaker is not facilitated; and if the driving piece adopts the rotating shaft and realizes the driving of the moving contact in a rotating mode, the occupied space can be well reduced, and the miniaturization design of the whole circuit breaker is facilitated.

For example, the utility model patent of patent number "ZL 201921873919.6", the utility model discloses a low pressure vacuum circuit breaker trip gear is disclosed, relate to vacuum circuit breaker technical field, including the electro-magnet, vacuum interrupter and tripping device, move in the electro-magnet control vacuum interrupter, static contact or separation and realize closing and separating brake, be equipped with tripping device between electro-magnet and the vacuum interrupter, tripping device includes a link assembly, link assembly has fold condition and relatively straight state, link assembly's fold condition and relatively straight state correspond tripping device's trip condition and lock catch state respectively, when overload or short-circuit fault appear in the circuit, link assembly in time responds to switch into fold condition so that move in the vacuum interrupter by relatively straight state, static contact separation and rapid tripping. The patent utilizes the linear motion of link assembly to drive moving contact rectilinear movement and realizes opening, closing function, has the great defect of volume.

Meanwhile, the conventional vacuum circuit breaker has the following drawbacks:

in the vacuum switch actuating mechanism of the vacuum circuit breaker, a part is a structure based on the magnetic transmission principle of a permanent magnet, and the structure has the advantages that a mechanical connection-free structure between a driving part and a driven part can be realized, namely, through repulsion transmission, better sealing is realized conveniently, and friction loss is reduced. However, in the conventional vacuum switch actuator based on the magnetic transmission principle of the permanent magnet, the driving mode of the permanent magnet is still a linear motion mode, that is, one of the permanent magnets is driven to move linearly, so that the other permanent magnet moves linearly, and therefore the problem cannot be solved.

In the manual switch and overcurrent protection mechanism of the traditional vacuum circuit breaker, the driving part adopts a push rod or a similar component which moves linearly, so other components connected with the driving part cannot be matched with a rotating shaft, and the problem can not be solved.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide a single-controlled multifunctional vacuum circuit breaker which can be turned on or off by driving the rotation of the rotating shaft.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

a single-circuit controlled multifunctional vacuum circuit breaker comprises a manual switch and overcurrent protection mechanism, a vacuum switch actuating mechanism and an overcurrent trigger mechanism, wherein the vacuum switch actuating mechanism comprises a vacuum cavity, an incoming line terminal static contact, an outgoing line terminal static contact and a moving contact are mounted in the vacuum cavity, the moving contact of the vacuum switch actuating mechanism is driven by a driving piece of the manual switch and the overcurrent protection mechanism, and the manual switch and the overcurrent protection mechanism are correspondingly connected with the overcurrent trigger mechanism; the vacuum switch actuating mechanism further comprises a first permanent magnet which is arranged outside the vacuum cavity and can drive the movable contact to move linearly through magnetic force, the first permanent magnet is provided with a magnet center hole, a driving piece of the manual switch and the overcurrent protection mechanism is a rotating shaft, and the rotating shaft penetrates through the magnet center hole of the first permanent magnet of the vacuum switch actuating mechanism and can drive the first permanent magnet to rotate synchronously.

In the structure, the design of the manual switch and the driving piece of the overcurrent protection mechanism as the rotating shaft is an important innovation, the rotating shaft utilizes self rotation to provide power for on and off control, and the rotary driving structure is more favorable for saving space and controlling accurately compared with a linear movement driving structure; the vacuum switch actuating mechanism is matched with the vacuum cavity and comprises a first permanent magnet which is arranged outside the vacuum cavity and can drive the moving contact to move linearly through magnetic force, the vacuum switch actuating mechanism is another important innovation, the first permanent magnet is arranged outside the vacuum cavity and is convenient to be connected with the rotating shaft, meanwhile, the magnetic property of the first permanent magnet can be utilized to realize transmission connection between the moving contact arranged in the vacuum cavity, and therefore the moving contact of the rotating shaft driving vacuum switch actuating mechanism can realize the on-off control function.

Preferably, in order to convert the rotary motion of the first permanent magnet into the linear motion of the movable contact and realize the transmission without mechanical contact, the vacuum switch actuating mechanism further comprises a second permanent magnet and a connecting rod which are arranged in the vacuum cavity, the vacuum cavity is provided with a cavity through hole, the cavity through hole and the inner space of the vacuum cavity are sealed with each other, the first permanent magnet is arranged in the cavity through hole, the S pole and the N pole are distributed on the periphery of the first permanent magnet, the second permanent magnet is arranged in the vacuum cavity and close to the cavity through hole and limited to be capable of linearly moving in the direction close to and far away from the first permanent magnet, one end of the second permanent magnet close to the first permanent magnet is the S pole or the N pole, and one end of the second permanent magnet far away from the first permanent magnet is connected with the first end of the connecting rod, and the second end of the connecting rod is connected with the moving contact.

Further, in order to improve the linear motion capability of the first permanent magnet for driving the second permanent magnet and improve the switching and switching control precision, the vacuum switch actuating mechanism further comprises a third permanent magnet, a first magnet mounting frame, a second magnet mounting frame and mounting frame connecting pieces, wherein the third permanent magnet is arranged in the vacuum cavity, is close to the cavity through hole and is respectively positioned at two opposite sides of the cavity through hole together with the second permanent magnet, the second permanent magnet is arranged on the first magnet mounting frame, the third permanent magnet is arranged on the second magnet mounting frame, two ends of the first magnet mounting frame and two ends of the second magnet mounting frame are respectively and correspondingly connected through the two mounting frame connecting pieces, and an S pole and an N pole are symmetrically distributed on the periphery of the first permanent magnet, the polarity of one end of the third permanent magnet close to the first permanent magnet meets the following condition: the first permanent magnet and the second permanent magnet repel each other, and the first permanent magnet and the third permanent magnet attract each other.

Preferably, in order to place two static contacts and one moving contact in a separate vacuum space to facilitate better arc extinguishing effect, the vacuum cavity comprises a first vacuum cavity and a second vacuum cavity, the inlet wire end static contact, the outlet wire end static contact and the moving contact are arranged in the first vacuum cavity, the second permanent magnet, the third permanent magnet, the first magnet mounting rack, the second magnet mounting rack and the mounting rack connecting piece are arranged in the second vacuum cavity, a second cavity cover is arranged at the first end of the second vacuum cavity, the second end of the second vacuum cavity is connected with the first end of the first vacuum cavity, a first cavity cover is arranged at the joint, the second end of the first vacuum cavity is closed, a cavity cover through hole is formed in the first cavity cover, and the connecting rod penetrates through the cavity cover through hole.

Furthermore, in order to enable the movable contact to have certain elasticity in the process of contacting with the fixed contact so as to achieve better conductive contact effect and avoid damage of the contact due to hard contact, the vacuum switch actuating mechanism further comprises a connecting disc, two positioning shafts are arranged on one side surface of the connecting disc, spiral compression springs are respectively sleeved on the two positioning shafts, a connecting disc through hole is arranged between the two positioning shafts on the connecting disc, two contacts are arranged at one end of the movable contact far away from the connecting rod, two positioning holes are respectively arranged at the corresponding positions of one end of the movable contact close to the connecting rod and the two contacts, the two positioning shafts are respectively arranged in the two positioning holes, the two spiral compression springs are positioned between the connecting disc and the movable contact, and a movable contact counter bore or a movable contact through hole is arranged at the position of the movable contact between the two positioning holes, the movable contact is characterized in that a connecting through hole which is communicated with the moving contact counter bore or the moving contact through hole and is vertical to the moving contact in the axial direction is arranged at a position between the two positioning holes on the movable contact, a section of the connecting rod, which is close to the second end, is reduced in diameter to form a small diameter section, a strip-shaped through hole which is coaxial with the connecting rod is arranged on the small diameter section, the small diameter section of the connecting rod penetrates through the connecting disc through hole and then is arranged in the moving contact counter bore or the moving contact through hole, a section of the connecting rod, which is close to the first end, is larger than the diameter of the connecting disc through.

Specifically, the overcurrent triggering mechanism comprises a triggering coil and a triggering moving rod, the triggering moving rod is arranged in the triggering coil and can axially move when the triggering coil is in overcurrent, and the outer end of a fixed contact at an outlet end of the vacuum switch actuating mechanism is correspondingly connected with the triggering coil of the overcurrent triggering mechanism and then is connected with an electric appliance.

Preferably, in order to integrate the handle control function, the automatic unhooking function and the automatic resetting function together and match with the rotary driving mode of the rotating shaft, the manual switch and the overcurrent protection mechanism comprise the rotating shaft, a fixing frame, a handle seat, a handle return spring, a unhooking component, an inner gear ring, a shaft gear and a trigger component, the handle is installed on the handle seat, the handle seat is installed on the fixing frame and can rotate, two ends of the handle return spring are respectively installed on the handle seat and the fixing frame and enable the handle to have stress from an on state to an off state, the unhooking component comprises a first hook and a second hook, the first hook and the second hook can mutually abut against and limit to form a transient stable state structure, a circular arc-shaped section is arranged on the hole wall of the through hole of the inner gear ring, and inner teeth are arranged on the circular arc-shaped section, the inner gear ring is installed on the fixing frame through the gear ring shaft and can rotate, the shaft gear is fixedly sleeved on the rotating shaft, the shaft gear is connected with the inner gear of the inner gear ring through self outer teeth in a meshed mode, the trigger assembly is installed on the fixing frame and can rotate, the trigger assembly is connected with the first hook in a rotating mode, the trigger assembly is in contact with the trigger rod, the trigger rod can drive the first hook to rotate to enable the first hook to be separated from the second hook and enable the inner gear ring to drive the shaft gear to rotate when moving.

Further, in order to better realize the handle control function, the automatic unhooking function, the automatic resetting function and the driving rotating shaft rotating function, the manual switch and overcurrent protection mechanism further comprises a handle connecting rod, a connecting rod push rod, an unhooking spring and a rotating shaft return spring, wherein the first end of the handle connecting rod is rotatably connected with the handle seat, the second end of the handle connecting rod is provided with the connecting rod push rod, the axial direction of the connecting rod push rod is mutually vertical to the axial direction of the handle connecting rod, the unhooking component further comprises a hook driving block and a hook rotating frame, the first hook and the hook driving block are fixedly connected and are both arranged on the fixing frame through a hook shaft and can rotate around the hook shaft, the circumferential outer wall of the inner gear ring is provided with a section of circular arc-shaped groove, and the position of the circumferential outer wall of the inner gear ring, which is close to one end of the, the hook rotating frame is arranged on the fixed frame through a rotating frame shaft and can rotate around the rotating frame shaft, the hook rotating frame comprises a section of circular arc strip matched with the inner gear ring, the circular arc strip is arranged in the circular arc groove, the circular arc strip is fixedly connected with the second hook, the circular arc strip is provided with a circular arc strip-shaped through hole, the connecting rod push rod penetrates through the circular arc strip-shaped through hole and is simultaneously arranged in the gap of the inner gear ring and is blocked by the hole wall at one side of the circular arc strip-shaped through hole so as not to be separated from the gap of the inner gear ring, the circumferential outer wall of the inner gear ring and the hook rotating frame are respectively provided with a connecting lug, two ends of the hook releasing spring are respectively connected with the two connecting lugs, and a connecting line between the connecting lug on the inner gear ring and the gap of the inner gear ring is positioned at one, the connecting line between the two connecting lugs is positioned on one side of the rotating frame shaft and is far away from the gap of the inner gear ring, the trigger assembly comprises a trigger shaft, a trigger piece and a trigger connecting rod, the trigger shaft is installed on the fixed frame and can rotate, the trigger piece is fixedly installed on the trigger shaft, two ends of the trigger connecting rod are respectively in rotating connection with the trigger piece and the hook driving block, and the trigger piece is respectively in contact connection with one end of the trigger rod; in order to improve the automatic return capability of the rotating shaft and the handle, two ends of the rotating shaft return spring are respectively arranged on the rotating shaft and the fixed frame and enable the rotating shaft to have stress from an on state to an off state.

Preferably, in order to facilitate accurate control of the rotation angle of the rotating shaft, the inner teeth on the through holes of the inner gear ring and the hole walls of the circular arc-shaped sections thereof meet the following requirements: when the inner gear ring rotates to enable the shaft gear to reach the other end from one end of the through hole of the inner gear ring, the shaft gear rotates by 160 degrees.

Preferably, the radial section of the rotating shaft is waist-shaped, and the magnet center hole of the first permanent magnet is a waist-shaped hole, so that the rotating shaft drives the first permanent magnet to synchronously rotate; the multifunctional vacuum circuit breaker of single-circuit control still includes motor drive and circuit breaker mounting bracket, motor drive installs on the circuit breaker mounting bracket, motor drive's rotatory power take off end with the one end of pivot is connected, is convenient for realize automatic opening, off control and long-range opening, off control like this.

The beneficial effects of the utility model reside in that:

the utility model adopts the rotating shaft as the driving piece of the manual switch and the overcurrent protection mechanism, and realizes the transmission connection between the moving contact arranged in the vacuum cavity by utilizing the magnetism of the first permanent magnet, thereby realizing the function of opening and closing control of the moving contact of the rotating shaft driving vacuum switch actuating mechanism, occupying less space, being beneficial to the miniaturization design and the accurate control of the whole circuit breaker, and being especially suitable for the on-off control of the phase line of the single-phase low-voltage alternating current power supply; more specific advantages are as follows:

the utility model discloses locate the first permanent magnet outside the vacuum cavity, be convenient for be connected with the pivot, locate the second permanent magnet in the vacuum cavity and be close to with the first permanent magnet and form magnetic force (suction or repulsion) transmission structure, convert the rotary motion of first permanent magnet into the linear motion of second permanent magnet, and be connected with the moving contact through the connecting rod, convert the rotary motion of first permanent magnet into the linear motion of moving contact, realize accurate opening, closing control function;

the utility model connects the third permanent magnet and the second permanent magnet together and respectively arranged at two sides of the first permanent magnet, when the first permanent magnet rotates, the second permanent magnet and the third permanent magnet are driven to move in the same direction, thereby obviously increasing the transmission capacity and leading the control of the moving contact to be more stable and accurate;

the utility model discloses place two static contacts and moving contact in first vacuum cavity alone, place second permanent magnet, third permanent magnet, first magnet mounting bracket, second magnet mounting bracket and mounting bracket connection piece in the second vacuum cavity, make the contact in the first vacuum cavity can realize better arc extinguishing effect in the switching-on, switching-off process, avoided the spark that produces when the contact breaks off to cause adverse effect to other parts simultaneously;

the utility model discloses an increase the connection pad between second cavity lid and moving contact to set up corresponding connection structure and helical compression spring, make the moving contact have certain elasticity in the contact process with the static contact in order to realize better electrically conductive contact effect, avoid hard contact to cause the contact to damage, can also avoid the contact failure problem that leads to because of the contact ablation, make the contact more laminate, reduce contact resistance, reduce contact calorific capacity;

the utility model discloses regard as the ring gear that has the internal tooth to realize the associative connection structure with the handle as the main part, and suit shaft gear and the internal tooth meshing of ring gear in the pivot, realize the rotatory rotary drive structure of drive pivot rotation through the ring gear rotation, thereby with handle control function, automatic unhook function, automatic reset function jointly integrated together and with the rotary drive mode looks adaptation of pivot, reduce occupation space as far as possible when satisfying the rotary drive demand, reduce the circuit breaker volume;

the utility model discloses a with the connecting rod push rod, ring gear breach and convex bar through-hole mutually support the important structure that forms automatic unhook structure, the handle passes through the connecting rod push rod and drives the rotatory realization of ring gear and open during normal work, the function of closing, the connecting rod push rod can not break away from the ring gear breach by spacing this moment, first couple and second couple separation when causing the overcurrent phenomenon because of short circuit or overload, the rotatory connecting rod push rod that drives of couple swivel mount breaks away from the ring gear breach, it is rotatory to take off the hook spring pulling ring gear, it is rotatory to drive the rotatory automatic turn-off circuit breaker of pivot, realize overflowing the protect function, remove and overflow behind the trouble, promote the handle, the connecting rod push rod drives the rotatory first couple of couple swivel mount messenger and second couple and support spacing formation temporary stable state structure each other, the connecting.

Drawings

Fig. 1 is a perspective exploded view of the single-circuit controlled multifunctional vacuum circuit breaker of the present invention before assembly;

fig. 2 is an assembled perspective view of the single-circuit controlled multifunctional vacuum circuit breaker of the present invention;

fig. 3 is a perspective exploded view of the vacuum switch actuator of the single-circuit controlled multifunctional vacuum circuit breaker according to the present invention before assembly, and also shows an overcurrent trigger mechanism;

fig. 4 is one of the assembled three-dimensional cross-sectional views of the vacuum switch actuator of the one-way controlled multifunctional vacuum circuit breaker of the present invention, in which the moving contact and the static contact are in a disconnected state, and the overcurrent trigger mechanism is also shown in the drawing;

fig. 5 is a second assembled perspective cross-sectional view of the vacuum switch actuator of the one-way controlled multifunctional vacuum circuit breaker of the present invention, in which the moving contact and the static contact are in a connected state, and an overcurrent trigger mechanism is also shown;

fig. 6 is a perspective exploded view of the single-circuit controlled multifunctional vacuum circuit breaker before the manual switch and the overcurrent protection mechanism are assembled;

fig. 7 is a perspective view of the single-circuit controlled multifunctional vacuum circuit breaker according to the present invention after the connection of the manual switch and the related components such as the handle and the inner gear ring of the overcurrent protection mechanism, and the view angle is the rear side of fig. 6;

fig. 8 is one of the three-dimensional views of the single-circuit controlled multifunctional vacuum circuit breaker according to the present invention in the working state, in which the overcurrent trigger mechanism is not actuated and the circuit breaker is in the open state;

fig. 9 is a second perspective view of the single-circuit controlled multifunctional vacuum circuit breaker according to the present invention in an operating state, in which the overcurrent trigger mechanism is actuated and the circuit breaker is in an open state;

fig. 10 is a third perspective view of the operating state of the single-circuit controlled multifunctional vacuum circuit breaker of the present invention, in which the overcurrent trigger mechanism is reset and the circuit breaker is in an off state.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1-6, the single-circuit controlled multifunctional vacuum circuit breaker of the present invention comprises a manual switch and overcurrent protection mechanism 5, a vacuum switch actuator 2 and an overcurrent trigger mechanism 3, wherein the vacuum switch actuator 2 comprises a vacuum cavity (see the first vacuum cavity 221 and the second vacuum cavity 205 of fig. 3-5), the vacuum cavity is internally installed with a stationary inlet terminal contact 220, a stationary outlet terminal contact 223 and a movable contact 218, the outer end of the stationary inlet terminal contact 220 and the outer end of the stationary outlet terminal contact 223 are respectively disposed outside the vacuum cavity, the movable contact 218 of the vacuum switch actuator 2 is driven by a driving member of the manual switch and overcurrent protection mechanism 5, the outer end of the stationary outlet terminal contact 223 of the vacuum switch actuator 2 is correspondingly connected with the overcurrent trigger mechanism 3 and then connected with an electrical appliance (not shown), the manual switch and the overcurrent protection mechanism 5 are correspondingly connected with the overcurrent trigger mechanism 3; the vacuum switch actuator 2 further comprises a first permanent magnet 207 which is arranged outside the vacuum chamber and can drive the movable contact 218 to move linearly through magnetic force, the first permanent magnet 207 is provided with a magnet center hole 208, a driving piece of the manual switch and overcurrent protection mechanism 5 is a rotating shaft 503, and the rotating shaft 503 penetrates through the magnet center hole 208 of the first permanent magnet 207 of the vacuum switch actuator 2 and can drive the first permanent magnet 207 to rotate synchronously.

Fig. 1 also shows a connecting terminal 6 for connecting the outer end of the inlet terminal fixed contact 220 and the outer end of the outlet terminal fixed contact 223 with external wires, respectively, which is an adaptive conventional structure.

As can be seen from fig. 1 and 2, all the components are integrally mounted together, most of the components are arranged in the mounting bracket, and the handle 501 of the manual switch and overcurrent protection mechanism 5 is arranged outside for convenient operation.

As shown in fig. 1-6, the basic working principle of the single-circuit controlled multifunctional vacuum circuit breaker of the present invention is: when the handle 501 is pushed to the on position, the rotating shaft 503 drives the first permanent magnet 207 to rotate, the movable contact 218 is connected with the inlet terminal fixed contact 220 and the outlet terminal fixed contact 223, the vacuum switch actuating mechanism 2 is in the on state, and the electric appliance is powered on to work; when the handle 501 is pushed to the off position, the rotating shaft 503 drives the first permanent magnet 207 to rotate reversely, so that the movable contact 218 is disconnected from the inlet terminal fixed contact 220 and the outlet terminal fixed contact 223, the vacuum switch actuating mechanism 2 is in the off state, and the electric appliance is powered off and stops working; when the vacuum switch actuating mechanism 2 is in an on state and an electrical appliance is in a short circuit or is overloaded, the overcurrent triggering mechanism 3 triggers the manual switch and the overcurrent protection mechanism 5 to automatically drive the rotating shaft 503 to rotate reversely, namely, automatic unhooking is realized, the vacuum switch actuating mechanism 2 is in an off state, and at the moment, the handle 501 automatically returns to an off position; when the short circuit or overload fault of the electric appliance is relieved, the overcurrent trigger mechanism 3 can automatically reset, and the manual switch and the overcurrent protection mechanism 5 can prepare for the next starting; when the handle 501 is pushed to the on position again, on one hand, the rotating shaft 503 is driven to rotate to enable the vacuum switch actuating mechanism 2 to be in the on state, and on the other hand, the manual switch and the overcurrent protection mechanism 5 are enabled to recover the hook state, so that preparation is made for next overcurrent protection.

As shown in fig. 1-10, the present invention also discloses a plurality of more optimized and more specific structures, and one or more structures can be combined with the above structures to form more optimized and more specific technical solutions according to actual needs.

As shown in fig. 3-5, in order to convert the rotational motion of the first permanent magnet 207 into the linear motion of the movable contact 218 and simultaneously realize the transmission without mechanical contact, the vacuum switch actuator 2 further includes a second permanent magnet 209 and a connecting rod 212 disposed in the vacuum cavity, the vacuum cavity is provided with a cavity through hole 206, the cavity through hole 206 and the inner space of the vacuum cavity are sealed with each other, the first permanent magnet 207 is disposed in the cavity through hole 206, S-pole and N-pole are distributed on the periphery of the first permanent magnet 207, the second permanent magnet 209 is disposed in the vacuum cavity at a position close to the cavity through hole 206 and limited to be capable of linearly moving in a direction close to and far away from the first permanent magnet 207, one end of the second permanent magnet 209 close to the first permanent magnet 207 is S-pole or N-pole, one end of the second permanent magnet 209 far away from the first permanent magnet 207 is connected to a, the second end of the link 212 is connected to the movable contact 218. When the switch works, the first permanent magnet 207 rotates to drive the polarity of the periphery of the first permanent magnet to change, the magnetic force between the first permanent magnet 207 and the second permanent magnet 209 changes, the moving contact 218 is pushed to be connected with the inlet wire end static contact 220 and the outlet wire end static contact 223, or the moving contact 218 is pulled to be disconnected with the inlet wire end static contact 220 and the outlet wire end static contact 223, and the on-off control function is realized.

As shown in fig. 3-5, in order to improve the ability of the first permanent magnet 207 to drive the second permanent magnet 209 to move linearly and thus improve the switching control precision, the vacuum switch actuator 2 further includes a third permanent magnet 203, a first magnet mounting bracket 210, a second magnet mounting bracket 202 and mounting bracket connecting pieces 204, which are disposed in the vacuum cavity, the third permanent magnet 203 is disposed in the vacuum cavity near the cavity through hole 206 and is located at two opposite sides of the cavity through hole 206 with the second permanent magnet 209, respectively, the second permanent magnet 209 is mounted on the first magnet mounting bracket 210, the third permanent magnet 203 is mounted on the second magnet mounting bracket 202, two ends of the first magnet mounting bracket 210 and two ends of the second magnet mounting bracket 202 are correspondingly connected through two mounting bracket connecting pieces 204, an S pole and an N pole are symmetrically distributed on the periphery of the first permanent magnet 207, the polarity of the end of third permanent magnet 203 adjacent first permanent magnet 207 satisfies the following condition: the first permanent magnet 207 and the third permanent magnet 203 attract each other while the first permanent magnet 207 and the second permanent magnet 209 repel each other, and conversely, the first permanent magnet 207 and the third permanent magnet 203 repel each other while the first permanent magnet 207 and the second permanent magnet 209 attract each other. During operation, no matter the first permanent magnet 207 rotates 130 degrees and 160 degrees in the same direction (specifically determined according to the magnitude of the magnetic force, the polarity of the two sides of the first permanent magnet 207 close to the second permanent magnet 209 and the third permanent magnet 203 changes, so that attraction force is generated on the second permanent magnet 209 and repulsion force is generated on the third permanent magnet 203, or repulsion force is generated on the second permanent magnet 209 and attraction force is generated on the third permanent magnet 203, the directions of the forces applied to the second permanent magnet 209 and the third permanent magnet 203 are the same, resultant force is formed, and the moving contact 218 is driven by the connecting rod 212 to be connected with or disconnected with the inlet terminal fixed contact 220 and the outlet terminal fixed contact 223, so that more efficient and accurate opening and closing control functions are realized.

As shown in fig. 3-5, in order to place the inlet terminal fixed contact 220, the outlet terminal fixed contact 223 and the movable contact 218 in separate vacuum spaces for better arc extinguishing effect, the vacuum cavity comprises a first vacuum cavity 221 and a second vacuum cavity 205, a wire inlet end static contact 220, a wire outlet end static contact 223 and a moving contact 218 are arranged in the first vacuum cavity 221, a second permanent magnet 209, a third permanent magnet 203, a first magnet mounting frame 210, a second magnet mounting frame 202 and a mounting frame connecting sheet 204 are arranged in the second vacuum cavity 205, a second cavity cover 201 is installed at the first end of the second vacuum cavity 205, a second end of the second vacuum cavity 205 is connected with the first end of the first vacuum cavity 221, a first cavity cover 211 is installed at the connection position, the second end of the first vacuum cavity 221 is sealed, a cavity cover through hole is formed in the first cavity cover 211, and the connecting rod 212 penetrates through the cavity cover through hole.

As shown in fig. 3 to 5, in order to make the movable contact 218 have a certain elasticity in the contact process with the inlet terminal fixed contact 220 and the outlet terminal fixed contact 223, so as to achieve a better conductive contact effect and avoid damage of the contacts due to hard contact, the vacuum switch actuator 2 further includes a connecting disc 214, two positioning shafts 216 are disposed on a side surface of the connecting disc 214, spiral compression springs 215 are respectively sleeved on the two positioning shafts 216, a connecting disc through hole (not marked in the drawing) is disposed on the connecting disc 214 at a position between the two positioning shafts 216, two contacts (not marked in the drawing) are disposed on an end of the movable contact 218 away from the connecting rod 212, two positioning holes (not marked in the drawing) are respectively disposed on an end of the movable contact 218 close to the connecting rod 212 and at positions corresponding to the two contacts, the two positioning shafts 216 are respectively disposed in the two positioning holes, and the two spiral compression springs, a moving contact counter bore 217 (or a moving contact through hole) is arranged at a position between the two positioning holes on the moving contact 218, a connecting through hole (not marked in the figure) which is communicated with the moving contact counter bore 217 and is vertical to the axial direction is arranged at a position between the two positioning holes on the moving contact 218, a section of diameter of the connecting rod 212 close to the second end is reduced to form a small-diameter section, a strip-shaped through hole 213 which is coaxial with the connecting rod 212 is arranged on the small-diameter section, the small-diameter section of the connecting rod 212 penetrates through the connecting disc through hole and then is arranged in the moving contact counter bore 217, a section of diameter of the connecting rod 212 close to the first end is larger than that of the connecting disc through hole, and. Because the length of the strip-shaped through hole 213 is greater than the width, the connecting pin 219 can move in the strip-shaped through hole 213, so that a movable connecting structure with a certain moving space is formed between the connecting rod 212 and the movable contact 218, and meanwhile, the helical compression spring 215 makes the connecting rod 212 and the movable contact 218 tend to be away from each other, so that the connection between the connecting rod 212 and the movable contact 218 is also stable, and only has certain elasticity when being pressed. In the process that the connecting rod 212 pushes the movable contact 218 to move and contact in the direction close to the inlet terminal fixed contact 220 and the outlet terminal fixed contact 223, the spiral pressure spring 215 enables the movable contact 218 to have a buffering effect when contacting the inlet terminal fixed contact 220 and the outlet terminal fixed contact 223, the contact is prevented from being damaged by too direct hard contact, meanwhile, the conductivity of the buffering type contact is better, the problem of poor contact caused by contact ablation can be avoided, the contact is more attached, the contact resistance is reduced, and the heating value of the contact is reduced.

As shown in fig. 3-10, the overcurrent triggering mechanism 3 includes a triggering coil 32 and a triggering rod 31, the triggering rod 31 is disposed in the triggering coil 32 and can move axially when the triggering coil 32 is overcurrent, and the outer end of the outlet static contact 223 of the vacuum switch actuator 2 is connected to the triggering coil 32 of the overcurrent triggering mechanism 3 and then connected to the electrical appliance (not shown). The trigger coil 32 and the electrical appliance form a series connection structure, the currents of the trigger coil 32 and the electrical appliance are the same, when the electrical appliance is in short circuit or is overloaded, the current of the trigger coil 32 is suddenly and remarkably increased, the trigger rod 31 axially moves towards the direction far away from the trigger coil 32, and the overcurrent trigger function is realized.

As shown in fig. 6-10, in order to integrate the handle control function, the automatic unhooking function, and the automatic reset function together and match with the rotation driving manner of the rotating shaft 503, the manual switch and overcurrent protection mechanism 5 includes the rotating shaft 503, a fixing frame 502, a handle 501, a handle holder 505, a handle return spring 506, an unhooking component, an inner gear ring 504, a shaft gear 515, and a trigger component, the handle 501 is mounted on the handle holder 505, the handle holder 505 is mounted on the fixing frame 502 and can rotate, two ends of the handle return spring 506 are respectively mounted on the handle holder 505 and the fixing frame 502, and the handle 501 has a stress from an open state to a closed state, the unhooking component includes a first hook 509 and a second hook 508, the first hook 509 and the second hook 508 can abut against each other to limit and form a temporary stable structure, the hole wall of the through hole 510 of the inner gear ring 504 is provided with a circular arc-shaped segment, and the circular arc-shaped segment is, the inner gear ring 504 is provided with an inner gear ring mounting hole 525 and is mounted on the fixing frame 502 by penetrating the inner gear ring mounting hole 525 through a gear ring shaft, the inner gear ring 504 can rotate, the shaft gear 515 is fixedly sleeved on the rotating shaft 503, the shaft gear 515 is in meshed connection with inner teeth of the inner gear ring 504 through outer teeth of the shaft gear 515, the trigger component is mounted on the fixing frame 502 and can rotate, the trigger component is rotatably connected with the first hook 509, the trigger component is in contact with the trigger moving rod 31, and the trigger moving rod 31 can drive the first hook 509 to rotate through the trigger component so as to enable the first hook 509 to be separated from the second hook 508 and enable the inner gear ring 504 to drive the shaft gear. The rotary driving structure which drives the rotating shaft 503 to rotate through the rotation of the inner gear ring 504 is matched with the rotary driving mode of the rotating shaft 503, so that the occupied space is reduced as much as possible while the rotary driving requirement is met, and the size of the circuit breaker is reduced.

As shown in fig. 6-10, in order to better implement the handle control function, the automatic unhooking function, the automatic resetting function and the rotation driving function of the rotating shaft, the manual switch and overcurrent protection mechanism 5 further includes a handle link 523, a link push rod 522, an unhooking spring 518 and a rotating shaft return spring 527, a first end of the handle link 523 is rotatably connected with the protrusion 507 on the handle holder 505, a second end of the handle link 523 is provided with a link push rod 522, an axial direction of the link push rod 522 is perpendicular to an axial direction of the handle link 523, the unhooking assembly further includes a hook driving block 513 and a hook rotating frame 519, a first hook 509 and the hook driving block 513 are fixedly connected and are both installed on the fixing frame 502 through a hook shaft 511 and can rotate around the hook shaft 511, a section of circular arc-shaped groove 524 is provided on a circumferential outer wall of the ring gear 504, a notch 516 is provided on a circumferential outer wall of the ring gear 504 at, a rotating frame mounting hole 517 is arranged on the hook rotating frame 519, the hook rotating frame 519 penetrates through the rotating frame mounting hole 517 through a rotating frame shaft and is mounted on the fixed frame 502, the hook rotating frame 519 can rotate around the rotating frame shaft, the hook rotating frame 519 comprises a section of circular arc strip (not marked in the figure) matched with the inner gear ring 504, the circular arc strip is arranged in the circular arc groove 524, the circular arc strip is fixedly connected with the second hook 508, a circular arc strip through hole 526 is arranged on the circular arc strip, a connecting rod push rod 522 penetrates through the circular arc strip through hole 526 and is simultaneously arranged in the inner gear ring notch 516 and is blocked by the hole wall at one side of the circular arc strip through hole 526 so that the circular arc strip cannot fall out of the inner gear ring notch 516, connecting lugs (not marked in the figure) are respectively arranged on the circumferential outer wall of the inner gear ring 504 and the hook rotating frame 519, two ends of the unhooking spring 518 are respectively connected with the two connecting lugs The connecting line between the two connecting protrusions is located on one side of the rotating frame shaft (i.e. located on one side of the rotating frame mounting hole 517) and is far away from the annular gear notch 516, the trigger assembly comprises a trigger shaft 514, trigger pieces 521 and a trigger link 520, the trigger shaft 514 is mounted on the fixed frame 502 and can rotate, the trigger pieces 521 corresponding to the overcurrent trigger mechanisms 3 one by one are respectively fixedly mounted on the trigger shaft 514, two ends of the trigger link 520 are respectively in rotary connection with one of the trigger pieces 521 and the hook driving block 513, and the trigger pieces 521 are respectively in contact connection with one end of the trigger rods 31; the two ends of the shaft return spring 527 are respectively installed on the shaft 503 and the fixed frame 502 and make the shaft 503 have stress from an on state to an off state. In order to facilitate precise control of the rotation angle of the rotating shaft 503, the through hole 510 of the inner gear ring 504 and the inner gear on the hole wall of the circular arc section thereof meet the following requirements: when the ring gear 504 rotates such that the shaft gear 515 reaches the other end from one end of the through hole 510 of the ring gear 504, the shaft gear 515 rotates by 160 °; the through hole 510 of the inner gear ring 504 is a semicircular through hole and the inner gear is arranged on the wall of the semicircular hole; the fixed frame 6 is further provided with a limit shaft 512 for blocking the second hook 508 from limiting the rotation of the hook rotary frame 519.

As shown in fig. 6 to 10, the working principle of the manual switch and overcurrent protection mechanism 5 is as follows:

the principle of manual control of opening and closing through the handle 501: as shown in fig. 4 and 10, when the handle 501 is in the off position, the inner gear ring 504, the shaft gear 515 and the rotating shaft 503 are correspondingly associated to disconnect the moving contact 218 from the inlet terminal fixed contact 220 and the outlet terminal fixed contact 223, and the circuit breaker is in the off state; when the circuit breaker needs to be in an open state, as shown in fig. 5 and 8, the handle 501 is pushed, the handle link 523 and the link push rod 522 drive the inner gear ring 504 to rotate, at this time, the link push rod 522 is clamped in the inner gear ring notch 516 and limited by the hook rotating frame 519 and simultaneously moves in the arc-shaped strip-shaped through hole 526, the inner gear ring 504 rotates to drive the shaft gear 515 and the rotating shaft 503 to synchronously rotate until the shaft gear rotates 130 and 160 degrees, the first permanent magnet 207 rotates 130 and 160 degrees, repulsive force is generated for the second permanent magnet 209 and suction force is generated for the third permanent magnet 203, the second permanent magnet 209 drives the link 212 and the moving contact 218 to move towards the direction close to the inlet end fixed contact 220 and the outlet end fixed contact 223 until the moving contact 218 is tightly contacted with the inlet end fixed contact 220 and the outlet end fixed.

Overcurrent triggers the principle of automatic unhooking: as shown in fig. 8, when the handle 501 is in the open position, the inner gear ring 504 has rotated a certain angle (clockwise rotation in fig. 8), so that the unhooking spring 518 is in a stretched state, and has a contraction stress, and the contraction stress makes the hooking rotating frame 519 have a tendency of clockwise rotation, but since the second hook 508 and the first hook 509 are buckled with each other, the second hook 508 and the hooking rotating frame 519 are blocked from rotating, and a transient state structure of the open state is maintained; when the electrical appliance is short-circuited or overloaded, the current of the trigger coil 32 is instantly and significantly increased, which causes the corresponding trigger rod 31 to move in a direction away from the trigger coil 32, causing the trigger piece 521 to rotate, causing the hook driving block 513 and the first hook 509 to rotate synchronously through the trigger link 520, causing the first hook 509 and the second hook 508 to disengage from each other, causing the second hook 508 and the hook rotating frame 519 to lose the blocking of the first hook 509, causing the hook rotating frame 519 to rotate clockwise under the action of the contraction stress of the unhook spring 518, and bringing the link push rod 522 out of the inner gear notch 516, as shown in fig. 9, due to the loss of the restriction of the link push rod 522, the inner gear 504 rotates counterclockwise under the action of the contraction stress of the unhook spring 518, causing the movable contact 218 to be disconnected from the incoming contact terminal 220 and the outgoing contact terminal 223, and causing the circuit breaker to be in an off state, the overcurrent protection function of overcurrent triggering automatic unhooking is realized.

The principle of the handle 501 self-return: after automatic unhooking, under the action of the handle return spring 506, the handle 501 rotates to return to the closed position automatically, the hook rotating frame 519 and the second hook 508 are driven to rotate anticlockwise through the handle connecting rod 523 and the connecting rod push rod 522 until the connecting rod push rod 522 slides into the inner gear ring notch 516, and at the moment, the handle 501 finishes automatic returning; meanwhile, if the overcurrent fault is relieved, the current of the trigger coil 32 returns to normal, the trigger rod 31 resets, the trigger piece 521 rotates reversely and resets (can reset under the self-weight, and can also be additionally provided with a reset spring to reset, both the trigger rod and the reset spring are of conventional structures), the trigger connecting rod 520 enables the hook driving block 513 and the first hook 509 to synchronously rotate reversely, the first hook 509 and the second hook 508 are correspondingly buckled with each other, the automatic hook function is realized, as shown in fig. 10, the whole circuit breaker returns to the initial state of the closed state, and preparation is made for next circuit breaker opening.

As shown in fig. 1-10, the radial section of the rotating shaft 503 is a kidney-shaped hole, and the magnet central hole 208 of the first permanent magnet 207 is a kidney-shaped hole, so that the rotating shaft 503 drives the first permanent magnet 207 to rotate synchronously; the single-path controlled multifunctional vacuum circuit breaker further comprises a motor driving device (not shown in the figure) and a circuit breaker mounting frame 1, wherein the motor driving device is mounted on the circuit breaker mounting frame 1, a control circuit board 4 is further mounted on the circuit breaker mounting frame 1 and used for realizing automatic control, and a rotary power output end of the motor driving device is connected with one end of a rotating shaft 503, so that the rotating shaft 503 is controlled by a motor to rotate to realize the on-off function, and meanwhile, the motor driving device and the control circuit board 4 are used for realizing the automatic on-off control and the remote on-off control function; the vacuum switch actuating mechanism 2, the manual switch and overcurrent protection mechanism 5 and the overcurrent trigger mechanism 3 are all one, and are suitable for on-off control of a phase line of a single-phase alternating-current power supply.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.

Claims (10)

1. A single-circuit controlled multifunctional vacuum circuit breaker comprises a manual switch and overcurrent protection mechanism, a vacuum switch actuating mechanism and an overcurrent trigger mechanism, wherein the vacuum switch actuating mechanism comprises a vacuum cavity, an incoming line terminal static contact, an outgoing line terminal static contact and a moving contact are mounted in the vacuum cavity, the moving contact of the vacuum switch actuating mechanism is driven by a driving piece of the manual switch and the overcurrent protection mechanism, and the manual switch and the overcurrent protection mechanism are correspondingly connected with the overcurrent trigger mechanism; the method is characterized in that: the vacuum switch actuating mechanism further comprises a first permanent magnet which is arranged outside the vacuum cavity and can drive the movable contact to move linearly through magnetic force, the first permanent magnet is provided with a magnet center hole, a driving piece of the manual switch and the overcurrent protection mechanism is a rotating shaft, and the rotating shaft penetrates through the magnet center hole of the first permanent magnet of the vacuum switch actuating mechanism and can drive the first permanent magnet to rotate synchronously.

2. The single-circuit controlled multifunctional vacuum circuit breaker according to claim 1, characterized in that: the vacuum switch actuating mechanism further comprises a second permanent magnet and a connecting rod, the second permanent magnet and the connecting rod are arranged in the vacuum cavity, the vacuum cavity is provided with a cavity through hole, the cavity through hole and the inner space of the vacuum cavity are sealed with each other, the first permanent magnet is arranged in the cavity through hole, the S pole and the N pole are distributed on the periphery of the first permanent magnet, the second permanent magnet is arranged in the position, close to the cavity through hole, in the vacuum cavity and limited and can linearly move in the direction close to and far away from the first permanent magnet, the end, close to the first permanent magnet, of the second permanent magnet is the S pole or the N pole, the end, far away from the first permanent magnet, of the second permanent magnet is connected with the first end of the connecting rod, and the second end of the connecting rod is.

3. The single-circuit controlled multifunctional vacuum circuit breaker according to claim 2, characterized in that: vacuum switch actuating mechanism is still including arranging in third permanent magnet, first magnet mounting bracket, second magnet mounting bracket and mounting bracket connection piece in the vacuum cavity, the third permanent magnet is arranged in be close to in the vacuum cavity the position of cavity through-hole and with the second permanent magnet is located respectively the relative both sides of cavity through-hole, the second permanent magnet is installed on the first magnet mounting bracket, the third permanent magnet is installed on the second magnet mounting bracket, the both ends of first magnet mounting bracket with respectively through two between the both ends of second magnet mounting bracket the mounting bracket connection piece corresponds, the periphery symmetric distribution of first permanent magnet has an S utmost point and an N utmost point, the third permanent magnet is close to the polarity of the one end of first permanent magnet satisfies following condition: the first permanent magnet and the second permanent magnet repel each other, and the first permanent magnet and the third permanent magnet attract each other.

4. The single-circuit controlled multifunctional vacuum circuit breaker according to claim 3, characterized in that: the vacuum cavity comprises a first vacuum cavity and a second vacuum cavity, the incoming line end static contact, the outgoing line end static contact and the moving contact are arranged in the first vacuum cavity, the second permanent magnet, the third permanent magnet, the first magnet mounting frame, the second magnet mounting frame and the mounting frame connecting piece are arranged in the second vacuum cavity, the second cavity cover is installed at the first end of the second vacuum cavity, the first cavity cover is installed at the position where the second end of the second vacuum cavity and the first end of the first vacuum cavity are connected and the connecting position is connected, the second end of the first vacuum cavity is sealed, the first cavity cover is provided with a cavity cover through hole, and the connecting rod penetrates through the cavity cover through hole.

5. The single-circuit controlled multifunctional vacuum circuit breaker according to claim 4, characterized in that: the vacuum switch actuating mechanism further comprises a connecting disc, two positioning shafts are arranged on one side surface of the connecting disc, spiral pressure springs are sleeved on the two positioning shafts respectively, a connecting disc through hole is formed in the connecting disc and positioned between the two positioning shafts, two contacts are arranged at one end, far away from the connecting rod, of the movable contact, two positioning holes are formed in the movable contact and positioned corresponding to the two contacts and close to one end of the connecting rod, the two positioning shafts are arranged in the two positioning holes respectively, the two spiral pressure springs are positioned between the connecting disc and the movable contact, a movable contact counter bore or a movable contact through hole is formed in the movable contact and positioned between the two positioning holes, a connecting through hole which is communicated with the movable contact counter bore or the movable contact through hole and is vertical to the axial direction is formed in the position, between the two positioning holes, of the movable contact, the connecting rod is provided with a connecting disc through hole, the connecting disc through hole is arranged in the moving contact counter bore or the moving contact through hole, the diameter of one section of the connecting rod close to the second end is reduced to form a small-diameter section, a strip-shaped through hole which is coaxial with the connecting rod is arranged on the small-diameter section, the small-diameter section of the connecting rod penetrates through the connecting disc through hole and then is arranged in the moving contact counter bore or the moving contact through hole, the diameter of one section of the connecting rod close to the first end is larger.

6. The single-circuit controlled multifunctional vacuum circuit breaker according to any of claims 1-5, characterized in that: the overcurrent triggering mechanism comprises a triggering coil and a triggering moving rod, the triggering moving rod is arranged in the triggering coil and can axially move when the triggering coil is in overcurrent, and the outer end of a fixed contact at a wire outlet end of the vacuum switch actuating mechanism is correspondingly connected with the triggering coil of the overcurrent triggering mechanism and then is connected with an electric appliance.

7. The single-circuit controlled multifunctional vacuum circuit breaker according to claim 6, characterized in that: the manual switch and overcurrent protection mechanism comprises a rotating shaft, a fixing frame, a handle seat, a handle return spring, a hook releasing component, an inner gear ring, a shaft gear and a trigger component, wherein the handle is installed on the handle seat, the handle seat is installed on the fixing frame and can rotate, two ends of the handle return spring are respectively installed on the handle seat and the fixing frame and enable the handle to have stress from an on state to an off state, the hook releasing component comprises a first hook and a second hook, the first hook and the second hook can mutually abut against each other to limit to form a temporary stable structure, a through hole wall of the inner gear ring is provided with an arc-shaped section, inner teeth are arranged on the arc-shaped section, the inner gear ring is installed on the fixing frame through a gear ring shaft and can rotate, and the shaft gear is fixedly sleeved on the rotating shaft, the shaft gear through self external tooth with the internal tooth meshing of ring gear is connected, trigger the subassembly and install on the mount and can rotate, trigger the subassembly with first couple swivelling joint, trigger the subassembly with trigger and move the pole contact, trigger the pole and can pass through when removing trigger the subassembly drives first couple is rotatory to be made first couple with the second couple breaks away from and can make the ring gear drives the shaft gear is rotatory.

8. The single-circuit controlled multifunctional vacuum circuit breaker according to claim 7, characterized in that: the manual switch and overcurrent protection mechanism further comprises a handle connecting rod, a connecting rod push rod, a unhooking spring and a rotating shaft return spring, wherein the first end of the handle connecting rod is rotatably connected with the handle seat, the second end of the handle connecting rod is provided with the connecting rod push rod, the axial direction of the connecting rod push rod is mutually perpendicular to the axial direction of the handle connecting rod, the unhooking component further comprises a hook driving block and a hook rotating frame, the first hook is fixedly connected with the hook driving block, both the first hook and the hook driving block are installed on the fixed frame through a hook shaft and can rotate around the hook shaft, a section of circular arc-shaped groove is arranged on the circumferential outer wall of the inner gear ring, an inner gear ring notch is arranged on the circumferential outer wall of the inner gear ring, the position of the circumferential outer wall of the inner gear ring is close to one end of the circular arc-shaped groove, the hook rotating frame comprises a section of circular arc strip matched with the inner gear ring, the circular arc strip is arranged in the circular arc groove and fixedly connected with the second hook, a circular arc strip-shaped through hole is formed in the circular arc strip, the connecting rod push rod penetrates through the circular arc strip-shaped through hole and is simultaneously arranged in the gap of the inner gear ring and is blocked by the hole wall on one side of the circular arc strip-shaped through hole so that the connecting rod push rod cannot fall off the gap of the inner gear ring, connecting lugs are respectively arranged on the circumferential outer wall of the inner gear ring and the hook rotating frame, two ends of the hook-releasing spring are respectively connected with the two connecting lugs, the connecting lug on the inner gear ring and the gap of the inner gear ring are positioned on one side of the gear ring shaft and far away from the rotating frame shaft, and the connecting wire between the two connecting lugs is positioned on one side of, the trigger assembly comprises a trigger shaft, a trigger piece and a trigger connecting rod, the trigger shaft is arranged on the fixed frame and can rotate, the trigger piece is fixedly arranged on the trigger shaft, two ends of the trigger connecting rod are respectively in rotary connection with the trigger piece and the hook driving block, and the trigger piece is respectively in contact connection with one end of the trigger rod; and two ends of the rotating shaft return spring are respectively arranged on the rotating shaft and the fixed frame, and the rotating shaft has stress from an open state to a closed state.

9. The single-circuit controlled multifunctional vacuum circuit breaker according to claim 7, characterized in that: the through holes of the inner gear ring and the inner gears on the hole walls of the circular arc sections of the through holes meet the following requirements: when the inner gear ring rotates to enable the shaft gear to reach the other end from one end of the through hole of the inner gear ring, the shaft gear rotates by 160 degrees.

10. The single-circuit controlled multifunctional vacuum circuit breaker according to any of claims 1-5, characterized in that: the radial section of the rotating shaft is waist-shaped, and the magnet center hole of the first permanent magnet is a waist-shaped hole; the multifunctional vacuum circuit breaker controlled by the single circuit further comprises a motor driving device and a circuit breaker mounting frame, wherein the motor driving device is installed on the circuit breaker mounting frame, and the rotary power output end of the motor driving device is connected with one end of the rotating shaft.

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