CN111029191A - Contact mechanism of low-voltage circuit breaker - Google Patents
Contact mechanism of low-voltage circuit breaker Download PDFInfo
- Publication number
- CN111029191A CN111029191A CN201911316000.1A CN201911316000A CN111029191A CN 111029191 A CN111029191 A CN 111029191A CN 201911316000 A CN201911316000 A CN 201911316000A CN 111029191 A CN111029191 A CN 111029191A
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- China
- Prior art keywords
- rack
- rod
- contact
- spring
- voltage circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/38—Auxiliary contacts on to which the arc is transferred from the main contacts
Abstract
The invention discloses a contact mechanism of a low-voltage circuit breaker, which comprises a driving wheel and an arc extinguish chamber, wherein the back of the driving wheel is fixedly connected with a driving device, the front surface of the driving wheel is provided with a manual rotating rod, the driving wheel is meshed and connected with two racks, the two racks are arranged in parallel, one end of the rack is fixedly connected with one end of a movable telescopic rod, the other end of the movable telescopic rod is fixedly connected with a movable contact spring, the number of the arc extinguish chambers is two, and respectively corresponding to the respective racks, a first spring is arranged in the arc extinguish chamber, the other end of the first spring is fixedly connected with the static contact plate, a plurality of arc extinguish plates are uniformly arranged on the inner wall of the arc extinguish chamber at equal intervals, the other end of the rack is fixedly connected with a limiting rod, the locating tube is sleeved outside the limiting rod, and the movable telescopic rod, the rack, the limiting rod and the locating tube are all of hollow structures, so that the invention has the beneficial effects that: not only provides safety guarantee measures and strengthens the safety performance of the circuit breaker, but also has better arc extinguishing effect.
Description
Technical Field
The invention relates to the technical field of low-voltage circuit breakers, in particular to a contact mechanism of a low-voltage circuit breaker.
Background
In a contact system of a circuit breaker, a fixed contact assembly is a key component in the circuit breaker, and the fixed contact assembly of the existing molded case circuit breaker is divided into a fixed contact and a movable fixed contact. The electrical contact is widely applied to the main electrical contact material of relays, contactors, load switches, medium and low voltage circuit breakers, switching appliances such as household appliances and automobile appliances (horns, lamps and ignition), the moving contact is a contact moving in operation, the static contact is a static contact waiting for the connection of the moving contact, and an electrical circuit can be automatically or manually switched on and off according to external designated signals and requirements. In the prior art, electrical contact systems are generally employed to perform the making and breaking of electrical circuits of electrical appliances. Existing electrical contact systems have both single and dual contact versions. Single-contact electrical contact systems usually have only one moving contact and one stationary contact, and when one moving contact and one stationary contact are in contact, the circuit can be completed. Dual contact electrical contact systems typically have a pair of movable contacts and a pair of stationary contacts, with the circuit being completed when both the pair of movable contacts and the pair of stationary contacts are in contact. Compared with a single-contact electric contact system, the double-contact electric contact system greatly increases the contact opening distance and has better arc extinguishing performance. However, for a dual contact electrical contact system, it is required that a pair of movable contacts and a pair of stationary contacts must be in reliable electrical contact, which may result in an electrical circuit that cannot be conducted if one movable contact and one stationary contact are not in reliable electrical contact.
Moreover, there is not corresponding error protection measure among the prior art's circuit breaker contact system, if the actuating mechanism that drives contact system switch-on and disconnection just can't carry out normal switch-on or disconnection in case break down in some times, especially if can't in time break off when the circuit trouble, will bring huge danger certainly.
Disclosure of Invention
The present invention is directed to a contact mechanism of a low-voltage circuit breaker, which solves the above problems of the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: a contact mechanism of a low-voltage circuit breaker comprises a driving wheel and arc extinguish chambers, wherein the back of the driving wheel is fixedly connected with a driving device, the front of the driving wheel is provided with a manual rotating rod, the driving wheel is meshed with and connected with two racks, the two racks are arranged in parallel, one end of each rack is fixedly connected with one end of a movable telescopic rod, the other end of each movable telescopic rod is fixedly connected with a movable contact spring, the two arc extinguish chambers are respectively corresponding to the respective racks, a first spring is arranged in each arc extinguish chamber, the other end of each first spring is fixedly connected with a static contact plate, a plurality of arc extinguish plates are uniformly arranged on the inner wall of each arc extinguish chamber in an equal distance, the other end of each rack is fixedly connected with a limiting rod, a positioning pipe is sleeved outside each limiting rod, each movable telescopic rod, each rack, each limiting rod, and the insulating rod penetrates through the movable telescopic rod, the rack, the limiting rod and the positioning tube in sequence and extends to the outside of the positioning tube.
Preferably, the movable telescopic rod comprises an outer rod and an inner rod, the outer rod is connected with the rack, the inner rod is connected with the movable contact piece, the inner rod and the outer rod are connected through a second spring, and the insulating rod is fixedly connected with the movable contact piece.
Preferably, the arc extinguishing piece is of a circular ring structure, and the inner wall of the arc extinguishing piece is provided with toothed arc extinguishing teeth.
Preferably, the outer wall of the limiting rod is tightly attached to the inner wall of the positioning tube, and the limiting rod and the positioning tube are in sliding connection.
Preferably, the two arc extinguishing chambers are respectively located on the left side and the right side of the driving wheel, the arc extinguishing chambers and the driving wheel are different in horizontal height, and the driving device is specifically a motor.
Compared with the prior art, the invention has the beneficial effects that:
1. the circuit can be quickly and effectively disconnected when the motor cannot rotate or the whole driving structure is broken down, so that the safety performance of the low-voltage short circuiter is greatly improved;
2. in the middle of the switching of whole circuit breaker circuit, because movable contact and static contact are in the arc extinguishing chamber all the time, so can improve arc extinguishing efficiency, simultaneously through taking the dentate arc extinguishing piece can be more quick cut into the short electric arc of a plurality of distances with electric arc, be convenient for extinguish.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the movable telescopic rod of the present invention;
figure 3 is a schematic view of the structure of the arc extinguishing piece of the invention.
In the figure: the device comprises a driving wheel 1, a manual rotating rod 2, a rack 3, a movable telescopic rod 4, an outer rod 401, an inner rod 402, a second spring 403, a movable contact 5, an arc extinguish chamber 6, a first spring 7, a static contact 8, an arc extinguish plate 9, a limiting rod 10, a positioning tube 11 and an insulating rod 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a low-voltage circuit breaker's contact mechanism, includes drive wheel 1 and explosion chamber 6, the back fixed connection drive arrangement of drive wheel 1, the front of drive wheel 1 sets up manual bull stick 2, two racks 3 are connected in the meshing of drive wheel 1, two rack 3 parallel arrangement, the one end of the one end fixed connection activity telescopic link 4 of rack 3, the other end fixed connection movable contact spring 5 of activity telescopic link 4, explosion chamber 6 is two in quantity, and corresponds respective rack 3 respectively, be provided with first spring 7 in the explosion chamber 6, the other end fixed connection static contact 8 of first spring 7, the inner wall equidistance of explosion chamber 6 evenly is provided with several arc extinguishing piece 9, the other end fixed connection gag lever post 10 of rack 3, the outside of gag lever post 10 cup joints registration arm 11, activity telescopic link 4, Rack 3, gag lever post 10 and registration arm 11 are hollow structure, set up insulator spindle 12 in the activity telescopic link 4, and insulator spindle 12 runs through activity telescopic link 4, rack 3, gag lever post 10 and registration arm 11 in proper order and extends to the outside of registration arm 11.
It should be noted that the movable telescopic rod 4 includes an outer rod 401 and an inner rod 402, the outer rod 401 is connected to the rack 3, the inner rod 402 is connected to the movable contact 5, the inner rod 402 and the outer rod 401 are connected through a second spring 403, and the insulating rod 12 is fixedly connected to the movable contact 5.
It should be noted that the outer wall of the limiting rod 10 is tightly attached to the inner wall of the positioning tube 11, and the two are connected in a sliding manner.
It should be noted that the arc-extinguishing piece 9 is a circular ring structure, and the inner wall of the arc-extinguishing piece 3 is provided with tooth-shaped arc-extinguishing teeth.
It should be noted that the two arc extinguishing chambers 6 are respectively located at the left and right sides of the driving wheel 1, and the horizontal heights of the two arc extinguishing chambers are different, and the driving device is specifically a motor.
When the circuit breaker needs to be disconnected, the driving device, namely the motor drives the driving wheel 1 to rotate clockwise, meanwhile, the rack 3 drives the movable contact piece 5 to be separated from the static contact piece 8 to realize the power failure of the circuit breaker, otherwise, when the circuit breaker needs to be closed, the motor rotates anticlockwise, the movable contact piece 5 is connected with the static contact piece 8, and in the connection process, the first spring 7 and the second spring 403 can play a role in buffering the movable contact piece 5 and the static contact piece 8, so that the effect of prolonging the service life is achieved;
secondly, when the rack 3 cannot move normally due to motor faults, the motor can be driven to be powered off manually through the manual rotating rod 2;
finally, if the rack 3 or the driving wheel 1 cannot rotate due to a fault, the insulating rod 12 can be pulled manually, and the movable contact piece 5 connected with the insulating rod 12 can be separated from the static contact piece 8 quickly.
In the middle of the switching of whole circuit breaker circuit, its movable contact 5 and static contact 8 are in explosion chamber 6 all the time, so can improve arc extinguishing efficiency, simultaneously through taking dentate arc-extinguishing piece 9 can be more quick cut electric arc into the short electric arc of a plurality of distances, be convenient for extinguish.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. The utility model provides a contact mechanism of low-voltage circuit breaker, includes drive wheel (1) and explosion chamber (6), its characterized in that: the back fixed connection drive arrangement of drive wheel (1), the front of drive wheel (1) sets up manual bull stick (2), two rack (3), two are connected in drive wheel (1) meshing rack (3) parallel arrangement, the one end of the one end fixed connection activity telescopic link (4) of rack (3), the other end fixed connection movable contact spring (5) of activity telescopic link (4), explosion chamber (6) quantity is two, and corresponds respective rack (3) respectively, be provided with first spring (7) in explosion chamber (6), the other end fixed connection static contact piece (8) of first spring (7), the inner wall equidistance of explosion chamber (6) evenly is provided with several arc extinguishing pieces (9), the other end fixed connection gag lever post (10) of rack (3), registration arm (11) is cup jointed to the outside of gag lever post (10), activity telescopic link (4), rack (3), gag lever post (10) and registration arm (11) are hollow structure, set up insulator spindle (12) in activity telescopic link (4), and insulator spindle (12) run through activity telescopic link (4), rack (3), gag lever post (10) and registration arm (11) in proper order and extend to the outside of registration arm (11).
2. A contact mechanism for low-voltage circuit breakers, as claimed in claim 1, characterized in that: the movable telescopic rod (4) comprises an outer rod (401) and an inner rod (402), the outer rod (401) is connected with the rack (3), the inner rod (402) is connected with the movable contact piece (5), the inner rod (402) is connected with the outer rod (401) through a second spring (403), and the insulating rod (12) is fixedly connected with the movable contact piece (5).
3. A contact mechanism for low-voltage circuit breakers, as claimed in claim 1, characterized in that: the arc extinguishing piece (9) is of a circular ring structure, and the inner wall of the arc extinguishing piece (3) is provided with toothed arc extinguishing teeth.
4. A contact mechanism for low-voltage circuit breakers, as claimed in claim 1, characterized in that: the outer wall of the limiting rod (10) is tightly attached to the inner wall of the positioning tube (11), and the limiting rod and the positioning tube are in sliding connection.
5. A contact mechanism for low-voltage circuit breakers, as claimed in claim 1, characterized in that: two explosion chamber (6) are located the left and right sides of drive wheel (1) respectively, and both level is different, drive arrangement specifically is the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911316000.1A CN111029191A (en) | 2019-12-19 | 2019-12-19 | Contact mechanism of low-voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911316000.1A CN111029191A (en) | 2019-12-19 | 2019-12-19 | Contact mechanism of low-voltage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111029191A true CN111029191A (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911316000.1A Pending CN111029191A (en) | 2019-12-19 | 2019-12-19 | Contact mechanism of low-voltage circuit breaker |
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| Country | Link |
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| CN (1) | CN111029191A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115036811A (en) * | 2022-07-01 | 2022-09-09 | 浙江杭升电气科技有限公司 | Switch cabinet with interlocking mechanism |
| CN115036811B (en) * | 2022-07-01 | 2024-04-26 | 浙江杭升电气科技有限公司 | Switch cabinet with interlocking mechanism |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6362444B1 (en) * | 1999-10-07 | 2002-03-26 | Lg Industrial Systems Co., Ltd. | Gas insulating switchgear |
| CN2548250Y (en) * | 2002-06-25 | 2003-04-30 | 中国振华（集团）科技股份有限公司宇光分公司 | Iron core for vacuum arc-chutes |
| CN101930856A (en) * | 2009-06-18 | 2010-12-29 | 汤富贵 | Mechanical transmission mechanism of remote switch |
| CN104576165A (en) * | 2014-12-22 | 2015-04-29 | 苏州施源特电气有限公司 | Stroke-controllable circuit breaker |
| CN105977070A (en) * | 2016-06-28 | 2016-09-28 | 山东达驰电气有限公司 | Non-excitation tapping switch for grounding transformer |
| CN106373820A (en) * | 2016-11-14 | 2017-02-01 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Double-break disconnector switch module |
| CN108987140A (en) * | 2017-06-01 | 2018-12-11 | 泰科电子(深圳)有限公司 | Electrical contact system |
-
2019
- 2019-12-19 CN CN201911316000.1A patent/CN111029191A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6362444B1 (en) * | 1999-10-07 | 2002-03-26 | Lg Industrial Systems Co., Ltd. | Gas insulating switchgear |
| CN2548250Y (en) * | 2002-06-25 | 2003-04-30 | 中国振华（集团）科技股份有限公司宇光分公司 | Iron core for vacuum arc-chutes |
| CN101930856A (en) * | 2009-06-18 | 2010-12-29 | 汤富贵 | Mechanical transmission mechanism of remote switch |
| CN104576165A (en) * | 2014-12-22 | 2015-04-29 | 苏州施源特电气有限公司 | Stroke-controllable circuit breaker |
| CN105977070A (en) * | 2016-06-28 | 2016-09-28 | 山东达驰电气有限公司 | Non-excitation tapping switch for grounding transformer |
| CN106373820A (en) * | 2016-11-14 | 2017-02-01 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Double-break disconnector switch module |
| CN108987140A (en) * | 2017-06-01 | 2018-12-11 | 泰科电子(深圳)有限公司 | Electrical contact system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115036811A (en) * | 2022-07-01 | 2022-09-09 | 浙江杭升电气科技有限公司 | Switch cabinet with interlocking mechanism |
| CN115036811B (en) * | 2022-07-01 | 2024-04-26 | 浙江杭升电气科技有限公司 | Switch cabinet with interlocking mechanism |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200417 |