CN211700171U

CN211700171U - Automatic switching-on and switching-off control device and circuit breaker

Info

Publication number: CN211700171U
Application number: CN202020143533.6U
Authority: CN
Inventors: 李海茭; 史胜余; 许利战; 祁卫华
Original assignee: Delixi Electric Co Ltd
Current assignee: Delixi Electric Co Ltd
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-10-16
Anticipated expiration: 2030-01-22

Abstract

The utility model relates to an automatic divide-shut brake controlling means and circuit breaker, circuit breaker include casing, circuit breaker handle and circuit breaker operating module. The automatic switching-on and switching-off control device is arranged in the shell and comprises a motor and a gear transmission module; the motor is arranged in the shell, and a transmission shaft of the motor is provided with a first worm; the gear transmission module comprises a first connecting gear, a second worm and a combined gear, the second worm is installed in the shell, the first connecting gear is installed at one side end of the second worm, the first connecting gear is connected with the first worm, and the second worm is connected with the combined gear. Compared with the prior art, the utility model can realize the opening and closing of the circuit breaker without additionally adding an additional modulus, has compact structure, can effectively control the whole volume of the circuit breaker, and saves the installation space; the gear transmission module improves the transmission ratio, reduces the power requirement on the motor and improves the working stability.

Description

Automatic switching-on and switching-off control device and circuit breaker

Technical Field

The utility model belongs to the technical field of the circuit breaker technique and specifically relates to an automatic divide-shut brake controlling means and circuit breaker are related to.

Background

With the development and progress of the technology, the application of the circuit breaker with the automatic switching-on and switching-off function in the smart power grid is more and more extensive, for example, a self-resetting overvoltage and undervoltage protector, a prepayment reclosing circuit breaker and the like can realize the remote control of the switching-on and switching-off of the circuit breaker. However, the existing circuit breakers with the automatic switching-on and switching-off function are all automatically switched on and off by adding a single module, so that the overall size of the circuit breaker is increased, and the miniaturization of the circuit breaker is not facilitated.

Chinese utility model patent with publication number CN105609383A discloses an opening and closing operation control device and a circuit breaker. This patent will divide closing drive part to set up in an solitary modulus, and then this divide closing drive part passes through the interior handle portion of handle internal shaft connection circuit breaker, realizes the control to circuit breaker divide-shut brake. However, the mode of additionally increasing the modulus makes the transmission structure complex, the transmission loss is large, the power requirement on the motor is high, and the control failure is easy to occur.

For example, chinese utility model patent with publication number CN106206190A discloses an opening and closing control structure and a circuit breaker with the same. According to the circuit breaker switching-on control method, a switching-on driving part is arranged in an independent modulus, and then the switching-on driving part is connected with a handle part in a circuit breaker through a handle inner shaft, so that the switching-on control of the circuit breaker is realized; meanwhile, the patent provides an opening driving part controlled by an electromagnet, and the opening driving part is directly arranged in the N pole of the circuit breaker. However, the patent also increases the overall volume of the circuit breaker due to the increase of the module, and the separation of the closing driving part and the opening driving part increases the complexity of the control.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an automatic divide-shut brake controlling means and circuit breaker in order to overcome the defect that above-mentioned prior art exists.

The purpose of the utility model can be realized through the following technical scheme:

an automatic switching-on and switching-off control device is characterized in that the automatic switching-on and switching-off control device is arranged in the shell and comprises a motor and a gear transmission module;

the motor is arranged in the shell, and a transmission shaft of the motor is provided with a first worm;

the gear transmission module comprises a first connecting gear, a second worm and a combined gear, the second worm is arranged in the shell, the first connecting gear is arranged at one side end of the second worm, the first connecting gear is connected with the first worm, the second worm is connected with the combined gear, the combined gear consists of a helical gear unit and a straight gear unit which are coaxially arranged, and the helical gear unit is connected with the second worm;

the circuit breaker handle is rotatably arranged on the shell, a handle gear is arranged on the circuit breaker handle, the handle gear is connected with a straight gear unit of the combined gear, and the handle gear and the straight gear unit are both of an incomplete-tooth gear structure;

when the breaker needs to be switched on, the motor starts to rotate forwards, the motor drives the first connecting gear to rotate through the first worm, the first connecting gear drives the second worm to rotate, and the combined gear drives the breaker handle to drive the breaker to automatically switch on along with the rotation of the second worm; after the breaker is switched on, the motor continues to rotate until the engagement between the straight gear unit of the combined gear and the handle gear of the breaker handle is removed, and at the moment, the breaker can be driven to be switched on and off freely by operating the breaker handle;

when the circuit breaker needs the separating brake, the motor starts the reversal, and the motor rotates through the first connecting gear of first worm drive, and then first connecting gear drives the second worm and rotates, and the composite gear follows the second worm and rotates, and then contact meshing between the straight-teeth gear unit of composite gear and the handle gear of circuit breaker handle drives circuit breaker handle drive circuit breaker and carries out automatic separating brake.

Further, the handle gear or the straight gear unit is of a sector gear structure.

Further, the first connecting gear and the second worm are connected through a spline structure.

Further, the motor is an open-loop control stepping motor.

Furthermore, the circuit breaker handle comprises a plurality of handle units, one handle unit is correspondingly installed on one module of the circuit breaker, each handle unit comprises a handle gear, the handle gear is used for connecting the circuit breaker operation module in each module of the circuit breaker, and the handle gears between two adjacent modules of the circuit breaker are mutually connected through a driving shaft or a handle sleeve.

Further, the circuit breaker in include moving contact and static contact, the static contact set up in the casing, the moving contact connect circuit breaker operating module, the circuit breaker handle pass through circuit breaker operating module and drive moving contact and static contact or separation, realize closing or the separating brake of circuit breaker.

Furthermore, the breaker operation module comprises a connecting rod, a moving contact support frame, a support piece, a jump buckle, a lock catch, a reset elastic piece and a breaking elastic piece;

the moving contact is connected with a moving contact support frame, and the moving contact support frame is rotatably arranged on the shell;

the support member is rotatably arranged on the shell and positioned at the upper part of the moving contact support frame, a rotating shaft of the support member is coaxial with a rotating shaft of the moving contact support frame, and the support member is connected with the moving contact support frame through a torsion spring;

the jump buckle is rotatably arranged on the support piece through a jump buckle rotating shaft and is provided with a first combination structure;

the lock catch is rotatably arranged on the support piece through a lock catch rotating shaft and is provided with a second combination structure, and the jump buckle rotating shaft, the lock catch rotating shaft and the rotating shaft of the support piece are not overlapped;

one end of the reset elastic piece is connected with the lock catch, and the other end of the reset elastic piece is connected with the shell and used for keeping the lock catch at a position capable of being combined with the jump buckle;

one end of the breaking elastic element is connected with the moving contact support frame, and the other end of the breaking elastic element is connected with the shell;

one end of the connecting rod is connected with the handle gear, the other end of the connecting rod is connected with the jump buckle, and when the breaker handle rotates, the connecting rod drives the jump buckle to rotate.

A circuit breaker is provided with the automatic opening and closing control device.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses set up automatic divide-shut brake controlling means in the casing of circuit breaker, need not to additionally increase the divide-shut brake that an extra modulus can realize the circuit breaker again, compact structure can the whole volume of effective control circuit breaker, practices thrift the space of installation.

2. The automatic opening and closing control device comprises a motor and a gear transmission module, wherein the gear transmission module comprises a first connecting gear, a second worm and a combined gear, and the combined gear is provided with incomplete teeth; the circuit breaker handle includes a handle gear also having incomplete teeth;

when the breaker needs to be switched on (for example, power supply is recovered after a user who has defaulting and power failure pays), the motor starts to rotate forwards, the motor drives the first connecting gear to rotate through the first worm, then the first connecting gear drives the second worm to rotate, and the combined gear drives the breaker handle to drive the breaker to automatically switch on (power supply is recovered at the moment); after the switch-on, the motor continues to rotate until the engagement between the straight gear unit of the combined gear and the handle gear of the breaker handle is removed, and at the moment, the breaker handle can rotate freely (namely, the automatic switch-on and switch-off control device cannot influence the manual operation of the breaker handle at the moment), and the manual control mode is switched;

when the breaker needs to be opened (for example, a user is in a state of arrearage or other situations needing power failure), the motor starts to rotate reversely, the motor drives the first connecting gear to rotate through the first worm, then the first connecting gear drives the second worm to rotate, the combined gear rotates along with the second worm, and then the straight gear unit of the combined gear is in contact engagement with the handle gear of the breaker handle to drive the breaker to automatically open; when the switch is in the off state, the combined gear is meshed with the handle gear, so that the manual switch-on of a user can be prevented.

3. The gear transmission module comprises a first connecting gear, a second worm and a combined gear, and the space occupation of the gear transmission module can be effectively saved through the connection of the gear and the worm, so that the influence of the gear transmission module on the internal structure of the circuit breaker is minimized; meanwhile, the gear transmission module utilizes the second worm to improve the transmission ratio, reduce the power requirement on the motor and improve the working stability.

4. The straight gear unit of the handle gear or the combined gear is of a sector gear structure, so that the stability of the handle gear or the combined gear during transmission is better.

Drawings

Fig. 1 is a schematic structural diagram of a circuit breaker according to an embodiment.

Fig. 2 is a schematic diagram of an N-pole structure in the circuit breaker according to the embodiment.

Fig. 3 is a schematic structural diagram of a motor and gear transmission module.

Fig. 4 is a schematic view of the mounting structure of the second worm and the first connecting gear.

Fig. 5 is a schematic structural diagram of a closing state.

FIG. 6 is a schematic structural diagram of the open state.

Reference numerals: 1. the circuit breaker comprises a shell, 2, a circuit breaker handle, 21, a handle unit, 211, a handle gear, 22, a driving shaft, 3, a circuit breaker operation module, 31, a connecting rod, 32, a movable contact supporting frame, 33, a supporting piece, 34, a jump buckle, 341, a jump buckle rotating shaft, 35, a lock buckle, 351, a lock buckle rotating shaft, 36, a breaking elastic piece, 37, a torsion spring, 41, a motor, 411, a first worm, 42, a gear transmission module, 423, a second worm, 421, a combined gear, 421a, a helical gear unit, 421b, a straight gear unit, 422, a first connecting gear, 423, a second worm, 5, a movable contact, 6 and a fixed contact.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1 and 2, the present embodiment provides a circuit breaker mounted with an automatic opening and closing control device. The circuit breaker adopts a 4-module circuit breaker and has 1N pole and 3P poles. The circuit breaker includes a case 1, a breaker handle 2, and a breaker operating module 3. The circuit breaker handle 2 includes a plurality of handle units 21, and one handle unit 21 is correspondingly mounted on one module of the circuit breaker. Each handle unit 21 comprises a handle gear 211, which handle gear 211 is used to connect the circuit breaker operating modules 3 within each module in the circuit breaker. The handle units 21 of two adjacent modules in the circuit breaker are connected with each other through a driving shaft 22 or a handle sleeve, and the driving shaft 22 is adopted in the embodiment. That is, the breaker handle 2 is connected with the breaker operation module 3 in each module of the breaker to drive the opening and closing of the breaker.

The automatic switching-on and switching-off control device is installed in an N-pole housing of the circuit breaker and comprises a motor 41 and a gear transmission module 42, which are specifically shown in fig. 2 and 3. The motor 41 is installed at the lower left portion of the N-pole housing, and a transmission shaft thereof is disposed upward, and a first worm 411 is installed. The gear transmission module 42 comprises a first connecting gear 422, a second worm 423 and a combination gear 421. The second worm 423 is installed in the N-pole housing, the first connecting gear 422 is installed at one side end of the second worm 423, the first connecting gear 422 is a helical gear structure or a worm wheel and is connected with the first worm 411; the second worm 423 is connected to the combination gear 421. The combination gear 421 is composed of a helical gear unit 421a and a spur gear unit 421b which are coaxially disposed. The helical gear unit 421a is connected to the second worm 423, and the spur gear unit 421b is connected to the handle gear 211. The handle gear 211 and the spur gear unit 421b are both of a gear structure of incomplete teeth.

As shown in fig. 4, the first connecting gear 422 and the second worm 423 are connected by a spline structure, a connecting key is provided on the second worm 423, and a key groove that engages with the connecting key is provided inside the first connecting gear 422.

In this embodiment, the motor 41 is a dc motor, specifically, an open-loop control stepping motor, and can receive a signal installed on a circuit board inside the body, and the control circuit board is a 0V or 220V level signal, and the motor 41 is turned on or off according to the signal.

The working principle of the embodiment is as follows:

as shown in fig. 2, 5 and 6, when the circuit breaker needs to be closed: the motor 41 starts to rotate forwards, the motor 41 drives the first connecting gear 422 to rotate through the first worm 411, and then the first connecting gear 422 drives the second worm 423 to rotate; the combined gear 421 rotates along with the second worm 423 to drive the breaker handle 2 to drive the breaker to automatically close; after the switching-on, the motor 41 continues to rotate until the engagement between the spur gear unit 421b of the combination gear 421 and the handle gear 211 of the circuit breaker handle 2 is released, at which time, the gearless portion of the spur gear unit 421b and the handle gear 211 are opposite to each other, and the rotation therebetween is not influenced by each other any more, thereby being used for manually operating the circuit breaker handle 2 freely to switch on and off the switching-on and off. As an improved scheme, the handle gear 211 or the spur gear unit 421b has a sector gear structure, so that the handle gear 211 has better stability when rotating.

When the circuit breaker needs to be opened: the motor 41 is started to rotate reversely, the motor 41 drives the first connecting gear 422 to rotate through the first worm 411, and then the first connecting gear 422 drives the second worm 423 to rotate; the combination gear 421 rotates along with the second worm 423, and then the straight gear unit 421b of the combination gear 421 contacts and engages with the handle gear 211 of the circuit breaker handle 2, so as to drive the circuit breaker handle 2 to drive the circuit breaker to perform automatic opening.

Each module is provided with a moving contact 5 and a fixed contact 6, the fixed contact 6 is arranged in the shell 1, the moving contact 5 is connected with the breaker operation module 3, and the handle unit 2 drives the moving contact 5 and the fixed contact 6 to contact or separate through the breaker operation module 3, so that the switching-on or switching-off of the breaker is realized.

The circuit breaker operating module 3 is a conventional mature technology, and specifically includes a connecting rod 31, a movable contact support 32, a support 33, a trip 34, a latch 35, a reset elastic element, and a breaking elastic element 36. The moving contact 5 is connected with a moving contact support frame 32, and the moving contact support frame 32 is rotatably arranged on the shell 1; the supporting member 33 is rotatably mounted on the housing 1, is located at the upper part of the movable contact supporting frame 32, and the rotating shaft is coaxial with the rotating shaft of the movable contact supporting frame 32, and the supporting member 33 is connected with the movable contact supporting frame 32 through a torsion spring 37; the jump ring 34 is rotatably mounted on the support member 33 by a jump ring rotating shaft 341 and has a first coupling structure; the lock catch 35 is rotatably mounted on the support member 33 through the lock catch rotating shaft 351, has a second coupling structure, and the rotating shafts of the jump catch rotating shaft 341, the lock catch rotating shaft 351 and the support member 33 do not coincide with each other; a return elastic member (not shown in the figure) having one end connected to the latch 35 and the other end connected to the housing 1, for holding the latch 35 at a position where it can be engaged with the jumper 34; one end of the disjunction elastic part 36 is connected with the moving contact support frame 32, and the other end is connected with the shell 1; one end of the connecting rod 31 is connected with the handle gear 211, the other end is connected with the jump buckle 34, and when the breaker handle 2 rotates, the connecting rod 31 drives the jump buckle 34 to rotate.

When the breaker is switched on, the breaker handle 2 rotates in the positive direction, the handle unit 21 pulls the trip buckle 34 to rotate through the connecting rod 31, the first combination structure of the trip buckle 34 is combined with the second combination structure on the lock catch 35, and after combination, the trip buckle 34 and the lock sweep pull the support 33 to rotate together; the support member 33 drives the moving contact support frame 32 to rotate through the torsion spring 37, and further drives the moving contact 5 to contact with the static contact 6; at this time, the breaking elastic member 36 stores energy, and the restoring elastic member rotates along with the latch 35 and is separated from the housing 1.

During opening, the breaker handle 2 rotates reversely, the breaker handle 2 pulls the trip buckle 34 to rotate through the connecting rod 31, the first combination structure on the trip buckle 34 is disengaged from the second combination structure on the lock catch 35, the acting force of the trip buckle 34 and the lock catch 35 on the support member 33 disappears, the acting force given to the moving contact support frame 32 by the support member 33 through the torsion spring 37 still exists, at the moment, the breaking elastic member 36 releases energy to push the moving contact support frame 32 to rotate, and the moving contact 5 is separated from the static contact 6; the return spring follows the latch 35 to rotate into contact with the housing 1, holding the latch 35 in a position in which it can engage the jumper 34.

In this embodiment, in order to achieve accurate automatic control, a position sensor may be further installed on the combination gear 421, and when the combination gear 421 rotates to a certain position, a position signal is sent to the circuit board, and the circuit board controls the motor 41 to stop or start according to the position of the combination gear 421; the position sensor can be a Hall sensor and a magnet, and can also be a microswitch. Since this part of the automatic control structure is a conventional arrangement in the prior art, it will not be described in detail here.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. An automatic switching-on and switching-off control device is characterized in that the automatic switching-on and switching-off control device is installed in the shell (1) and consists of a motor (41) and a gear transmission module (42);

the motor (41) is arranged in the shell (1), and a transmission shaft of the motor (41) is provided with a first worm (411);

the gear transmission module (42) comprises a first connecting gear (422), a second worm (423) and a combined gear (421), the second worm (423) is installed in the shell (1), the first connecting gear (422) is installed at one side end of the second worm (423), the first connecting gear (422) is connected with the first worm (411), the second worm (423) is connected with the combined gear (421), the combined gear (421) consists of a helical gear unit (421a) and a straight gear unit (421b) which are coaxially arranged, and the helical gear unit (421a) is connected with the second worm (423);

the circuit breaker handle (2) is rotatably arranged on the shell (1), a handle gear (211) is arranged on the circuit breaker handle (2), the handle gear (211) is connected with a straight gear unit (421b) of the combined gear (421), and the handle gear (211) and the straight gear unit (421b) are both in an incomplete-tooth gear structure;

motor (41) are through first worm (411) drive first connecting gear (422) and are rotated, and then first connecting gear (422) drive second worm (423) and rotate, and combination gear (421) rotate along with second worm (423), and then contact engagement between straight gear unit (421b) of combination gear (421) and handle gear (211) of circuit breaker handle (2), drive circuit breaker handle (2) drive circuit breaker and carry out automatic separating brake.

2. The automatic switching-on/off control device according to claim 1, wherein the handle gear (211) or the spur gear unit (421b) is of a sector gear structure.

3. An automatic switching on/off control device according to claim 1, characterized in that the first connecting gear (422) and the second worm (423) are connected by a spline structure.

4. An automatic switching-on/off control device according to claim 1, characterized in that the motor (41) is an open-loop control stepping motor.

5. An automatic switching-on/off control device according to claim 1, characterized in that the circuit breaker handle (2) comprises a plurality of handle units (21), one handle unit (21) is correspondingly installed on one module of the circuit breaker, each handle unit (21) comprises a handle gear (211), the handle gear (211) is used for connecting the circuit breaker operation module (3) in each module of the circuit breaker, and the handle gears (211) between two adjacent modules of the circuit breaker are mutually connected through the driving shaft (22) or the handle sleeve.

6. The automatic switching-on and switching-off control device according to claim 1, wherein the circuit breaker comprises a movable contact (5) and a fixed contact (6), the fixed contact (6) is arranged in the housing (1), the movable contact (5) is connected with the circuit breaker operating module (3), and the circuit breaker handle (2) drives the movable contact (5) and the fixed contact (6) to contact or separate through the circuit breaker operating module (3) to realize switching-on or switching-off of the circuit breaker.

7. The automatic switching-on and switching-off control device according to claim 5, characterized in that the breaker operation module (3) comprises a connecting rod (31), a movable contact support frame (32), a support member (33), a trip buckle (34), a lock catch (35), a reset elastic member and a breaking elastic member (36);

the moving contact (5) is connected with a moving contact support frame (32), and the moving contact support frame (32) is rotatably arranged on the shell (1);

the support member (33) is rotatably arranged on the shell (1) and is positioned at the upper part of the movable contact support frame (32), the rotating shaft of the support member (33) is coaxial with the rotating shaft of the movable contact support frame (32), and the support member (33) is connected with the movable contact support frame (32) through a torsion spring (37);

the jump buckle (34) is rotatably arranged on the support piece (33) through a jump buckle rotating shaft (341) and is provided with a first combination structure;

the lock catch (35) is rotatably arranged on the support (33) through a lock catch rotating shaft (351) and is provided with a second combination structure, and the rotating shafts of the jump catch rotating shaft (341), the lock catch rotating shaft (351) and the support (33) are not overlapped;

one end of the reset elastic piece is connected with the lock catch (35), and the other end of the reset elastic piece is connected with the shell (1) and used for keeping the lock catch (35) at a position capable of being combined with the jump buckle (34);

one end of the disjunction elastic part (36) is connected with the moving contact support frame (32), and the other end is connected with the shell (1);

one end of the connecting rod (31) is connected with the handle gear (211), the other end of the connecting rod is connected with the jump buckle (34), and when the breaker handle (2) rotates, the connecting rod (31) drives the jump buckle (34) to rotate.

8. A circuit breaker, characterized in that the circuit breaker is provided with the automatic opening and closing control device according to any one of claims 1 to 7.