CN217280661U - Auxiliary contact device of plastic shell type circuit breaker - Google Patents
Auxiliary contact device of plastic shell type circuit breaker Download PDFInfo
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- CN217280661U CN217280661U CN202123301445.8U CN202123301445U CN217280661U CN 217280661 U CN217280661 U CN 217280661U CN 202123301445 U CN202123301445 U CN 202123301445U CN 217280661 U CN217280661 U CN 217280661U
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- push rod
- auxiliary
- alarm
- circuit breaker
- contact
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Abstract
The utility model discloses a plastic casing formula circuit breaker auxiliary contact device, it includes circuit board, micro-gap switch, auxiliary push rod, warning push rod, spring, axle, and micro-gap switch fixes on the circuit board, and three micro-gap switch can be installed to every circuit board, and auxiliary push rod, warning push rod cover in fixing, can change according to the concrete production requirement, through improving auxiliary push rod structure, the effectual commonality that improves auxiliary push rod.
Description
Technical Field
The utility model relates to a low-voltage switchgear technical field specifically is a plastics shell type circuit breaker auxiliary contact device.
Background
Plastic casing formula circuit breaker is used for distributing the electric energy in distribution network, and as overload, short circuit and the undervoltage protection device of circuit and supply apparatus, and information such as circuit breaker divide-shut brake state can be used for showing to the supplementary push rod of general moulded case circuit breaker body assembly, also through the assembly warning push rod, can be used to fault signal's transmission.
The auxiliary contact scheme of the plastic case circuit breaker commonly used in the market at present is that, form the auxiliary contact with the form of plastic case and micro-gap switch, it is fixed through the mode of clamping in the inside or lower part of circuit breaker face lid, and generally every is supplementary to possess two contact positions at most, the shortcoming of this kind of structural style lies in, in narrow and small plastic case circuit breaker casing, micro-gap switch clamps in the plastic case, the plastic case clamps inside the circuit breaker again, lead to micro-gap switch's position uniformity relatively poor, the space of auxiliary contact occupies greatly, the commonality is low, micro-gap switch and circuit breaker complex reliability is not high, need pertinence to adjust when mass production.
Disclosure of Invention
In order to solve the technical problems, the auxiliary push rod is improved, the universality of the contact accessory of the molded case circuit breaker is improved, and the occupied space of the contact accessory is reduced.
In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows:
a kind of plastic casing type circuit breaker auxiliary contact device, it includes the breadboard, microswitch, auxiliary push rod, alarm push rod, axle, the microswitch is a plurality of fixed settings under the breadboard, its contact is downward, the breadboard level sets up and fixed connection with middle cover of circuit breaker, the auxiliary push rod, alarm push rod, cover are put on axle, can rotate, both ends of the axle are connected with middle cover, the auxiliary push rod, alarm push rod are set up under the microswitch, the alarm push rod has two ends, one of them end is contacted with a microswitch activity, another end is contacted with the front end of the moving contact pivot of circuit breaker; one end of the auxiliary push rod is movably contacted with the microswitch, and the other end of the auxiliary push rod is contacted with the rear end of the movable contact rotating shaft.
The movable contact rotating shaft is L-shaped, the rear end of the movable contact rotating shaft is movably contacted with the other end of the auxiliary push rod, and the front end of the movable contact rotating shaft is contacted with the other end of the alarm push rod.
The circuit board is fixedly connected with the middle cover through a mounting screw, the micro switch is welded on the circuit board, and the contact button of the micro switch faces downwards. Two groups of contacts are arranged in each microswitch, one group is a normally open contact, and the other group is a normally closed contact; when the external contact button is pressed to be closed, the normally open contact inside the external contact button is closed, and the normally closed contact inside the external contact button is opened; when the external contact button is not pressed, the normally open contact is opened and the normally closed contact is closed.
Further, the alarm push rod body is in a long rod shape, the included angle between one end of the alarm push rod body and the other end of the alarm push rod body is larger than 145 degrees and smaller than or equal to 180 degrees, the auxiliary push rod body is in a V shape, and the included angle between one end of the auxiliary push rod body and the other end of the auxiliary push rod body is smaller than 120 degrees and larger than 45 degrees.
Furthermore, a push plate is fixedly arranged at one end of the auxiliary push rod, the plate body of the push plate is parallel to the shaft, and the push plate can be in movable contact with the two micro switches, so that the occupied space of accessories can be reduced.
Furthermore, the alarm push rod and the auxiliary push rod are connected with the shaft through a torsion spring, one end of the torsion spring is connected with the alarm push rod or the auxiliary push rod body, the other end of the torsion spring is connected with the middle cover, and the torsion spring gives clockwise thrust to the alarm push rod or the auxiliary push rod in a natural state.
The moving contact of the circuit breaker has three states: in the brake-off state, the other end of the auxiliary push rod is not stressed, the torsional force of a torsional spring acts on the auxiliary push rod, a push plate at one end of the auxiliary push rod is in contact with contact buttons of the two micro switches, and the micro switches are closed; the other end of the alarm push rod is not contacted with the front end of the rotating shaft and is not stressed, and at the moment, one end of the alarm push rod is contacted with the microswitch contact button; when the circuit breaker is in a closing state, the other end of the auxiliary push rod is contacted with the rear end of the rotating shaft, the acting force of a torsion spring is overcome, at the moment, one end of the auxiliary push rod and a contact button of the micro switch are in a separated state, and the micro switch is disconnected; the other end of the alarm push rod is not stressed, the torsional force of a torsional spring acts on the auxiliary push rod, a push plate at one end of the auxiliary push rod is in contact with contact buttons of the two micro switches, and the micro switches in contact with the push plate are closed; the circuit breaker moving contact dropout state, the pivot front end perk, the auxiliary push rod other end is not atress, torsional spring torsional force is used in the auxiliary push rod, auxiliary push rod one end push pedal and two micro-gap switch's contact button contact, this micro-gap switch closure, the other end and the pivot front end contact of warning push rod overcome torsional spring effort, the one end and the micro-gap switch contact button of warning push rod are in the separation state this moment, this micro-gap switch disconnection.
The utility model has the advantages that:
the circuit board and the microswitch are integrated together, various push rods are arranged under the circuit board and on one shaft, the auxiliary (alarm) push rod is fixed on the middle cover, the auxiliary push rod and the alarm push rod can be interchanged, and the device is installed according to the actual requirements of users, so that the universality of the auxiliary push rod accessories of the circuit breaker is improved; the circuit board passes through the screw fixation inside the circuit breaker, and the micro-gap switch welds on the circuit board, and size uniformity is very good, and the action reliability that effectively improves auxiliary contact is high.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the installation state of the present invention;
FIG. 3 is a schematic view of the device connected to a middle cover;
fig. 4 is a schematic diagram of a tripping state of the embodiment of the present invention;
fig. 5 is a schematic view of the embodiment of the present invention in a closing state;
FIG. 6 is a schematic view of the embodiment of the present invention in a normal open state;
fig. 7 is a schematic structural view of an auxiliary push rod and an alarm push rod.
1. The device comprises a microswitch, 2 an alarm push rod, 3 a circuit board, 4 a torsion spring, 5 an axis, 6 an auxiliary push rod, 7 a middle cover, 8 an axis seat, 9 a moving contact rotating shaft and 10 a push plate.
Detailed Description
The auxiliary contact device of the circuit breaker with a plastic shell as shown in the attached figures 1-6 comprises a circuit board 3, a micro switch 1, an auxiliary push rod 6, an alarm push rod 2 and a shaft 5, wherein the micro switch 1 is fixedly arranged below the circuit board 3, the contacts of the micro switch are downward, the circuit board 3 is horizontally arranged and fixedly connected with a middle cover 7 of the circuit breaker, the auxiliary push rod 6 and the alarm push rod 2 are sleeved on the shaft 5 and can rotate, two ends of the shaft 5 are connected with the middle cover 7, the auxiliary push rod 6 and the alarm push rod 2 are arranged right below the micro switch 1, the alarm push rod 2 is provided with two end parts, one end part is movably contacted with one micro switch 1, and the other end part is contacted with the front end of a movable contact rotating shaft 9 of the circuit breaker; one end of the auxiliary push rod 6 is movably contacted with the micro switch 1, and the other end of the auxiliary push rod 6 is contacted with the rear end of the movable contact rotating shaft 9.
The movable contact rotating shaft 9 is L-shaped, the rear end of the movable contact rotating shaft is movably contacted with the other end of the auxiliary push rod 6, and the front end of the movable contact rotating shaft is contacted with the other end of the alarm push rod 2.
The circuit board 3 is fixedly connected with the middle cover 7 through a mounting screw, the microswitch 1 is welded on the circuit board 3, and a contact button of the microswitch faces downwards. Two groups of contacts are arranged in each microswitch, one group is a normally open contact, and the other group is a normally closed contact; when the external contact button is pressed to be closed, the normally open contact inside the external contact button is closed, and the normally closed contact inside the external contact button is opened; when the external contact button is not pressed, the normally open contact is opened and the normally closed contact is closed.
Further, the alarm push rod 2 is in a long rod shape, an included angle between one end of the alarm push rod and the other end of the alarm push rod is larger than 145 degrees and smaller than or equal to 180 degrees, the rod body of the auxiliary push rod 6 is in a V shape, and an included angle between one end of the auxiliary push rod and the other end of the auxiliary push rod is smaller than 120 degrees and larger than 45 degrees.
Furthermore, one end of the auxiliary push rod 6 is fixedly provided with a push plate 10, the plate body of the push plate 10 is parallel to the shaft 5, and the push plate 10 can be movably contacted with the two micro switches 1, so that the occupied space of accessories can be reduced.
Further, the alarm push rod 2 and the auxiliary push rod 6 are connected with the shaft 5 through the torsion spring 4, one end of the torsion spring 4 is connected with the rod body of the alarm push rod 2 or the auxiliary push rod 6, the other end of the torsion spring is connected with the middle cover 7, and in a natural state, as shown in fig. 4, the torsion spring 4 gives a clockwise pushing force to the alarm push rod 2 or the auxiliary push rod 6.
The moving contact of the circuit breaker has three states:
as shown in fig. 4, when the moving contact of the circuit breaker is in a tripping state, the other end of the auxiliary push rod 6 is not stressed, the torsion of the torsion spring 4 acts on the auxiliary push rod 6, the push plate 10 at one end of the auxiliary push rod 6 is in contact with the contact buttons of the two micro switches 1, the micro switches 1 are closed, the other end of the alarm push rod 2 is in contact with the front end of the rotating shaft 5, the action force of the torsion spring 4 is overcome, at the moment, one end of the alarm push rod 2 and the contact button of the micro switch 1 are in a separated state, and the micro switch 1 is disconnected;
in a closing state of the circuit breaker shown in fig. 5, the other end of the auxiliary push rod 6 contacts with the rear end of the rotating shaft 5, the acting force of the torsion spring 4 is overcome, at this time, one end of the auxiliary push rod 6 and a contact button of the micro switch 1 are in a separated state, and the micro switch 1 is disconnected; the other end of the alarm push rod 2 is not stressed, the torsion force of the torsion spring 4 acts on the auxiliary push rod 6, a push plate 10 at one end of the auxiliary push rod 6 is contacted with contact buttons of the two micro switches 1, and the micro switches 1 are closed;
as shown in fig. 6, when the circuit breaker is in an open state, the other end of the auxiliary push rod 6 is not stressed, the torsion of the torsion spring 4 acts on the auxiliary push rod 6, the push plate 10 at one end of the auxiliary push rod 6 is in contact with the contact buttons of the two micro switches 1, and the micro switches 1 are closed; the other end of the alarm push rod 2 is in contact with the front end of the rotating shaft, the acting force of the torsion spring is overcome, at the moment, one end of the alarm push rod 2 is separated from the contact button of the microswitch 1, and the microswitch 1 is disconnected.
The circuit board and the microswitch are integrated together, various push rods are arranged under the circuit board and are arranged on a shaft, two ends of the shaft are connected with a shaft seat 8 on a middle cover, the middle cover is provided with a mounting hole, the shaft seats are arranged on two sides, the shaft seats 8 are provided with shaft holes, various push rods are arranged at the mounting holes through the shaft, the circuit board is arranged above the mounting holes through screws, an auxiliary (alarm) push rod is fixed on the middle cover, the auxiliary push rod and the alarm push rod can be interchanged and are arranged according to the actual requirements of users, and the universality of auxiliary push rod accessories of the circuit breaker is improved; the circuit board passes through the screw fixation inside the circuit breaker, and the micro-gap switch welds on the circuit board, and size uniformity is very good, and the action reliability that effectively improves auxiliary contact is high.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, without departing from the principles of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention without creative work.
Claims (6)
1. The utility model provides a plastics shell type circuit breaker auxiliary contact device which characterized by: the circuit board, the micro switch, the auxiliary push rod, the alarm push rod and the shaft are arranged, the micro switch is composed of three parts which are fixedly arranged below the circuit board, contacts of the micro switch face downwards, the circuit board is horizontally arranged and fixedly connected with a middle cover of the circuit breaker, the auxiliary push rod, the alarm push rod and the shaft are sleeved on the shaft and can rotate, two ends of the shaft are connected with the middle cover, the auxiliary push rod and the alarm push rod are arranged under the micro switch, the alarm push rod is provided with two end parts, one end part of the alarm push rod is movably contacted with one micro switch, and the other end part of the alarm push rod is contacted with the front end of a rotating shaft of a moving contact of the circuit breaker; one end of the auxiliary push rod is movably contacted with the microswitch, and the other end of the auxiliary push rod is contacted with the rear end of the movable contact rotating shaft.
2. The auxiliary contact device of a plastic-cased circuit breaker as claimed in claim 1, wherein: the movable contact rotating shaft is L-shaped, the rear end of the movable contact rotating shaft is movably contacted with the other end of the auxiliary push rod, and the front end of the movable contact rotating shaft is contacted with the other end of the alarm push rod.
3. The auxiliary contact device of a plastic-cased circuit breaker of claim 1, wherein: the circuit board is fixedly connected with the middle cover through a mounting screw, the microswitch is welded on the circuit board, and a contact button of the microswitch faces downwards.
4. The auxiliary contact device of a plastic-cased circuit breaker as claimed in claim 1, wherein: the alarm push rod body is long rod-shaped, the included angle between one end of the alarm push rod body and the other end of the alarm push rod body is larger than 145 degrees and smaller than or equal to 180 degrees, the auxiliary push rod body is V-shaped, and the included angle between one end of the auxiliary push rod body and the other end of the auxiliary push rod body is smaller than 120 degrees and larger than 45 degrees.
5. The auxiliary contact device of a plastic-cased circuit breaker as claimed in claim 1, wherein: the push plate is fixedly arranged at one end of the auxiliary push rod, the plate body of the push plate is parallel to the shaft, and the push plate is in movable contact with the two micro switches.
6. The auxiliary contact device of a plastic-cased circuit breaker as claimed in claim 1, wherein: the alarm push rod and the auxiliary push rod are connected with the shaft through a torsion spring, one end of the torsion spring is connected with the alarm push rod or the auxiliary push rod body, the other end of the torsion spring is connected with the middle cover, and the torsion spring gives clockwise thrust to the alarm push rod or the auxiliary push rod in a natural state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123301445.8U CN217280661U (en) | 2021-12-27 | 2021-12-27 | Auxiliary contact device of plastic shell type circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123301445.8U CN217280661U (en) | 2021-12-27 | 2021-12-27 | Auxiliary contact device of plastic shell type circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217280661U true CN217280661U (en) | 2022-08-23 |
Family
ID=82888436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123301445.8U Active CN217280661U (en) | 2021-12-27 | 2021-12-27 | Auxiliary contact device of plastic shell type circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217280661U (en) |
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2021
- 2021-12-27 CN CN202123301445.8U patent/CN217280661U/en active Active
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