CN214505417U - Moving contact anti-falling device of molded case circuit breaker - Google Patents
Moving contact anti-falling device of molded case circuit breaker Download PDFInfo
- Publication number
- CN214505417U CN214505417U CN202120966149.0U CN202120966149U CN214505417U CN 214505417 U CN214505417 U CN 214505417U CN 202120966149 U CN202120966149 U CN 202120966149U CN 214505417 U CN214505417 U CN 214505417U
- Authority
- CN
- China
- Prior art keywords
- moving contact
- spout
- contact
- arc
- circuit breaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000012634 fragment Substances 0.000 claims abstract description 17
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 230000003068 static effect Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract 1
- 230000002265 prevention Effects 0.000 abstract 1
- 230000005520 electrodynamics Effects 0.000 description 12
- 230000009471 action Effects 0.000 description 5
- 230000008094 contradictory effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Landscapes
- Breakers (AREA)
Abstract
The utility model relates to a moving contact anti-falling device of a plastic case circuit breaker, which comprises a contact rotating shaft and a moving contact, wherein the contact rotating shaft comprises a base moving contact which is arranged symmetrically on both sides and is in a J-shaped arrangement, the moving contact is rotationally connected on the base through a rotating shaft bolt, the moving contact comprises a front part, middle part and rear portion, one side that the rear portion deviates from the middle part is equipped with the arc sunken, the base member outer peripheral face is provided with the fixed plate towards the moving contact, the upper right side is equipped with the shell fragment of "W" font in the fixed plate, bolted connection is respectively on the lateral wall of fixed plate in the outer both sides of shell fragment, first spout and second spout have been seted up on the lateral wall of base member, first spout is located between shell fragment side and the fixed plate, second spout length direction's extension line is the contained angle setting with the extension line on the first spout length direction, all be equipped with the fastener who is used for fastening the moving contact in first spout and the second spout. The utility model has the advantages that: the moving contact can be effectively prevented from falling in the segmenting process, and the falling prevention effect is good.
Description
Technical Field
The utility model relates to a moulded case circuit breaker technical field, in particular to moulded case circuit breaker moving contact dropproof device.
Background
The contact system of the molded case circuit breaker always comprises one or a group of contact springs to generate contact pressure between a movable contact and a fixed contact so as to ensure that the contact has enough contact pressure when being closed, so that the resistance of the contact point is small enough to ensure that the temperature rise of the circuit breaker is within the range specified by the national standard, thereby ensuring the safe application of the circuit breaker.
At present, the molded case circuit breaker is used as a branch-level distribution electrical appliance of a distribution system, and along with the continuous increase of the capacity of a power grid and the requirement of centralized distribution, the breaking capacity of the system is required to be higher and higher, so that the current-limiting type contact structure is widely applied to the molded case circuit breaker. However, the repulsion force of the contacts of the current-limiting type contact structure depends on the current passing through the contacts, namely when the current value is increased to a certain value, the moving contact and the static contact start to repel under the action of the loop electrodynamic force and the node electrodynamic force, the current flowing through the contacts before the breaker is switched on is reduced to the condition that the electrodynamic force is smaller than the repulsion force between the moving contact and the static contact due to the rapid increase of the resistance between the contacts and the periodic change of the alternating current, at the moment, the contacts which are repelled before move from the repulsion position to the closing position along with the reduction of the electrodynamic force, so-called contact drop phenomenon is caused, and the contact drop can cause the reignition of the electric arc between the contacts to prevent the fault current from being switched on.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a moulded case circuit breaker moving contact dropproof device.
The technical scheme of the utility model is realized like this: a drop-proof device for a movable contact of a molded case circuit breaker comprises a contact rotating shaft and the movable contact, wherein the contact rotating shaft comprises a base body movable contact which is symmetrically arranged on the left side and the right side and is arranged in a J shape, the movable contact is rotatably connected to a base body through a rotating shaft bolt, the movable contact comprises a front part, a middle part and a rear part, the front part is used for being in contact fit with a fixed contact, the rear part is positioned in the base body, one side of the rear part, which is far away from the middle part, is provided with an arc-shaped recess, the peripheral surface of the base body is provided with a fixed plate towards the movable contact, the fixed plate is provided with an opening for the movable contact to move, the upper right side in the fixed plate is provided with a W-shaped elastic sheet, the two outer sides of the elastic sheet are respectively connected to the side wall of the fixed plate through bolts, the middle part of the outer side of the elastic sheet is used for being abutted to the arc-shaped recess when the movable contact is repelled, the side wall of the base body is provided with a first sliding chute and a second chute, the first chute is positioned between the inner side of the elastic sheet and the fixed plate, one side of first spout sets up towards the arc depressed part when the movable contact is repelled, and the second spout is located the shell fragment right side, and second spout length direction's extension line is the contained angle setting with first spout length direction's extension line, and the contained angle is 60 ~ 65, all is equipped with the fastener that is used for fastening the movable contact in first spout and the second spout, and the same setting of two base member inner structure.
By adopting the technical scheme, the outer side of the elastic sheet is the side corresponding to the opening, the moving contact and the fixed contact start to be repelled under the action of the loop electrodynamic force and the node electrodynamic force, and the moving contact is clamped by the elastic sheet and the fastening device, so that the repelled moving contact is quickly fixed, the phenomenon that the contact of the moving contact falls in the breaking process can be effectively prevented, the quick breaking can be realized, and the breaking capacity of the circuit breaker is improved.
The utility model discloses further set up to: the fastening device comprises springs and shaft pins, one ends of the two springs are welded to one side, away from the moving contact, of the first sliding groove and the second sliding groove respectively, the other ends of the two springs are fixedly connected with the shaft pins, the shaft pins on the first sliding groove are abutted to the concave parts in the elastic pieces, and the inner side of the rear portion is provided with a first arc-shaped groove matched with the shaft pins on the second sliding groove.
By adopting the technical scheme, when fault current flows through the circuit breaker, the moving contact and the static contact overcome the counter force of a contact spring to begin to be repelled under the simultaneous action of loop electrodynamic force and node electrodynamic force, the convex part in the middle of the elastic sheet slides into the arc-shaped recess and is abutted against the bottom of the arc-shaped recess, the spring in the second sliding chute pushes the shaft pin in the sliding chute to slide into the first arc-shaped groove and is abutted against the bottom of the first arc-shaped groove, the spring in the first sliding chute pushes the shaft pin in the sliding chute to be abutted against the concave part on the inner side of the elastic sheet, so that the elastic sheet further exerts acting force on the arc-shaped recess, and the moving contact is clamped and is not easy to fall.
The utility model discloses further set up to: the rear portion outside integrated into one piece has the arc arch, has seted up the second arc wall on the shell fragment corresponds one side with the opening, and the second arc wall is used for moving contact and static contact to cooperate when inconsistent with the arc arch.
Through adopting above-mentioned technical scheme, when the moving contact is in the closure state, through setting up second arc wall and arc arch, spring through in the first spout promotes the pivot on this spout, the shell fragment of contradicting, make the shell fragment exert the rear portion of moving contact and exert towards open-ended effort, the pivot on this spout is promoted to the spring in the rethread second spout, it exerts down force on the sunken adjacent one side with the opening of arc to contradict, make the rear portion further receive the effort to towards open-ended direction, working pressure between moving contact and the static contact has been guaranteed.
The utility model discloses further set up to: the bottoms of the first arc-shaped groove and the second arc-shaped groove and the bottom of the arc-shaped recess are provided with rough layers.
By adopting the technical scheme, when the moving contact is in a repulsion state, the friction force between the pin and the moving contact on the elastic sheet and the second chute is increased, so that the elastic sheet and the pin are not easy to deviate, and the moving contact is further prevented from falling off in the segmentation process.
The utility model discloses further set up to: a gasket is arranged between the outer side of the elastic sheet and the bolt.
Through adopting above-mentioned technical scheme, through setting up the gasket, make the connection between shell fragment and the fixed plate more firm difficult not hard up.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a diagram of a moving contact repulsion state of a moving contact drop-proof device of a moving contact of a molded case circuit breaker according to an embodiment of the present invention;
fig. 2 is the utility model discloses embodiment moulded case circuit breaker moving contact dropproof device moving contact lock state diagram.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 to 2, the utility model discloses a moving contact anti-falling device of a molded case circuit breaker, comprising a contact rotating shaft and a moving contact 2, wherein the contact rotating shaft comprises a base body 1 and the moving contact 2 which are symmetrically arranged at the left side and the right side, the moving contact 2 is arranged in a J shape, the moving contact 2 is rotationally connected to the base body 1 through a rotating shaft bolt 3, the moving contact 2 comprises a front part 21, a middle part 22 and a rear part 23, the front part 21 is used for contacting and matching with a static contact, the rear part 23 is positioned in the base body 1, one side of the rear part 23 departing from the middle part 22 is provided with an arc-shaped recess 4, the outer peripheral surface of the base body 1 is provided with a fixed plate 5 towards the moving contact 2, the fixed plate 5 is provided with an opening for moving the moving contact 2, the upper right side in the fixed plate 5 is provided with a W-shaped elastic sheet 6, the outer sides of the elastic sheet 6 are respectively bolted on the side wall of the fixed plate 5, the middle part of the outer side of the elastic sheet 6 is used for abutting against the arc-shaped recess 4 when the moving contact 2 is repelled, first spout 7 and second spout 71 have been seted up on the lateral wall of base member 1, first spout 7 is located between 6 inboard sides of shell fragment and fixed plate 5, arc sunken 4 department when one side of first spout 7 is repelled towards moving contact 2 sets up, second spout 71 is located the 6 right sides of shell fragment, second spout 71 length direction's extension line is the contained angle setting with the extension line on the 7 length direction of first spout, the contained angle is 60 ~ 65, all be equipped with the fastener that is used for fastening moving contact 2 in first spout 7 and the second spout 71, and the same setting of structure in two base members 1.
By adopting the technical scheme, the outer side of the elastic sheet is the side corresponding to the opening, the moving contact and the fixed contact start to be repelled under the action of the loop electrodynamic force and the node electrodynamic force, and the moving contact is clamped by the elastic sheet and the fastening device, so that the repelled moving contact is quickly fixed, the phenomenon that the contact of the moving contact falls in the breaking process can be effectively prevented, the quick breaking can be realized, and the breaking capacity of the circuit breaker is improved.
The utility model discloses in the embodiment, fastener includes spring 8 and pivot 9, and the one end of two springs 8 welds respectively in one side of keeping away from moving contact 2 in first spout 7 and the second spout 7, and the other end and pivot 9 fixed connection of two springs 8, pivot 9 on the first spout 7 are inconsistent with the interior recess of shell fragment 3, and the first arc wall 10 with pivot 9 looks adaptation on the second spout 71 is seted up to rear portion 23 inboard.
By adopting the technical scheme, when fault current flows through the circuit breaker, the moving contact and the static contact overcome the counter force of a contact spring to begin to be repelled under the simultaneous action of loop electrodynamic force and node electrodynamic force, the convex part in the middle of the elastic sheet slides into the arc-shaped recess and is abutted against the bottom of the arc-shaped recess, the spring in the second sliding chute pushes the shaft pin in the sliding chute to slide into the first arc-shaped groove and is abutted against the bottom of the first arc-shaped groove, the spring in the first sliding chute pushes the shaft pin in the sliding chute to be abutted against the concave part on the inner side of the elastic sheet, so that the elastic sheet further exerts acting force on the arc-shaped recess, and the moving contact is clamped and is not easy to fall.
The utility model discloses in the embodiment, rear portion 23 outside integrated into one piece has arc arch 11, has seted up second arc wall 12 on shell fragment 6 and the corresponding one side of opening, and second arc wall 12 is used for moving contact 2 to match when inconsistent with arc arch 11 with the static contact.
Through adopting above-mentioned technical scheme, when the moving contact is in the closure state, through setting up second arc wall and arc arch, spring through in the first spout promotes the pivot on this spout, the shell fragment of contradicting, make the shell fragment exert the rear portion of moving contact and exert towards open-ended effort, the pivot on this spout is promoted to the spring in the rethread second spout, it exerts down force on the sunken adjacent one side with the opening of arc to contradict, make the rear portion further receive the effort to towards open-ended direction, working pressure between moving contact and the static contact has been guaranteed.
In the embodiment of the present invention, the bottom of the first arc-shaped groove 10 and the second arc-shaped groove 12 and the bottom of the arc-shaped recess 4 are both provided with rough layers.
By adopting the technical scheme, when the moving contact is in a repulsion state, the friction force between the pin and the moving contact on the elastic sheet and the second chute is increased, so that the elastic sheet and the pin are not easy to deviate, and the moving contact is further prevented from falling off in the segmentation process.
In the embodiment of the present invention, a gasket is disposed between the outer side of the elastic sheet 6 and the bolt.
Through adopting above-mentioned technical scheme, through setting up the gasket, make the connection between shell fragment and the fixed plate more firm difficult not hard up.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a moulded case circuit breaker moving contact dropproof device, includes contact pivot and moving contact (2), its characterized in that: the contact rotating shaft comprises a base body (1) and a movable contact (2), wherein the base body (1) is symmetrically arranged on the left side and the right side, the movable contact (2) is arranged in a J shape, the movable contact (2) is rotatably connected to the base body (1) through a rotating shaft plug pin (3), the movable contact (2) comprises a front part (21), a middle part (22) and a rear part (23), the front part (21) is used for being in contact fit with a fixed contact, the rear part (23) is positioned in the base body (1), an arc-shaped recess (4) is arranged on one side of the rear part (23) departing from the middle part (22), a fixing plate (5) is arranged on the outer peripheral surface of the base body (1) and faces the movable contact (2), an opening for moving the movable contact (2) to move is formed in the fixing plate (5), a W-shaped elastic sheet (6) is arranged on the inner upper right side of the fixing plate (5), the outer two sides of the elastic sheet (6) are respectively connected to the side wall of the fixing plate (5) through bolts, the middle part of the outer side of the elastic sheet (6) is used for being abutted against the arc-shaped recess (4) when the movable contact (2) is repelled, first spout (7) and second spout (71) have been seted up on the lateral wall of base member (1), first spout (7) are located between shell fragment (6) inboard and fixed plate (5), arc sunken (4) department when one side of first spout (7) is repulsed towards moving contact (2) sets up, second spout (71) are located shell fragment (6) right side, the extension line of second spout (71) length direction is the contained angle setting with the extension line on first spout (7) length direction, the contained angle is 60 ~ 65, all be equipped with the fastener that is used for fastening moving contact (2) in first spout (7) and second spout (71), and the same setting of inner structure of two base members (1).
2. The moving contact anti-falling device of the molded case circuit breaker as claimed in claim 1, wherein: the fastening device comprises springs (8) and a shaft pin (9), one ends of the two springs (8) are welded to one side, away from the moving contact (2), of the first sliding groove (7) and the second sliding groove (71) respectively, the other ends of the two springs (8) are fixedly connected with the shaft pin (9), the shaft pin (9) on the first sliding groove (7) is abutted to the concave part of the elastic sheet (6), and the inner side of the rear part (23) is provided with a first arc-shaped groove (10) matched with the shaft pin (9) on the second sliding groove (71).
3. The moving contact anti-falling device of the molded case circuit breaker as claimed in claim 1, wherein: an arc-shaped bulge (11) is integrally formed on the outer side of the rear part (23), a second arc-shaped groove (12) is formed in one side, corresponding to the opening, of the elastic sheet (6), and the second arc-shaped groove (12) is used for being abutted to the arc-shaped bulge (11) when the moving contact (2) is matched with the static contact.
4. The moving contact anti-falling device of the molded case circuit breaker as claimed in claim 2 or 3, wherein: rough layers are arranged at the bottoms of the first arc-shaped groove (10) and the second arc-shaped groove (12) and the bottom of the arc-shaped recess (4).
5. The moving contact anti-falling device of the molded case circuit breaker as claimed in claim 1, wherein: a gasket is arranged between the outer side of the elastic sheet (6) and the bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120966149.0U CN214505417U (en) | 2021-05-07 | 2021-05-07 | Moving contact anti-falling device of molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120966149.0U CN214505417U (en) | 2021-05-07 | 2021-05-07 | Moving contact anti-falling device of molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214505417U true CN214505417U (en) | 2021-10-26 |
Family
ID=78204664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120966149.0U Active CN214505417U (en) | 2021-05-07 | 2021-05-07 | Moving contact anti-falling device of molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214505417U (en) |
-
2021
- 2021-05-07 CN CN202120966149.0U patent/CN214505417U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6262642B1 (en) | Circuit breaker rotary contact arm arrangement | |
| AU2002304367B2 (en) | Electrical switching apparatus having an arc runner with an elongated raised ridge | |
| KR100619107B1 (en) | High current electric switching device | |
| US7141751B2 (en) | Breaker for providing successive trip mechanism based on PTC current-limiting device | |
| IE842963L (en) | Electric circuit breaker with improved operating¹mechanism | |
| CN214505417U (en) | Moving contact anti-falling device of molded case circuit breaker | |
| CN208460677U (en) | A kind of double-contact relay of anti-release electric arc | |
| US4493005A (en) | Overload by-pass conductor with an external short circuit path | |
| CA1252497A (en) | Movable contact arm assembly for a current limiting circuit breaker | |
| KR100978270B1 (en) | Current-limiting mechanism device for circuit breaker | |
| US5160817A (en) | Electrical switch contact arrangement having quick break arcing contacts | |
| ES8800505A1 (en) | Molded case circuit breaker with an improved operating mechanism having a pivot-transfer trip-free linkage. | |
| CN214624943U (en) | Moving contact system of low-voltage molded case circuit breaker | |
| US6429759B1 (en) | Split and angled contacts | |
| CN206711851U (en) | A kind of moving contact of breaker repulsion flick after step self-locking structure | |
| US4916419A (en) | Circuit breaker contact assembly | |
| DK143671B (en) | ELECTRICAL SWITCH SWITCH | |
| CN209896013U (en) | Current-limiting and rapid breaking structure of miniature circuit breaker | |
| CN209895992U (en) | Single-contact relay for defining positive and negative electrode directions | |
| KR101483027B1 (en) | Circuit Breaker | |
| KR100486746B1 (en) | Current limiting apparatus of circuit breaker | |
| TW512380B (en) | Circuit breaker | |
| US3648003A (en) | Electrical switch having contacts provided with rollers | |
| CN217641022U (en) | Circuit breaker operating device is anticreep bearing for pivot | |
| US3729608A (en) | Electrical switch having pivoted arm contact |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |