CN109273330B - Double-contact breaker - Google Patents
Double-contact breaker Download PDFInfo
- Publication number
- CN109273330B CN109273330B CN201811366727.6A CN201811366727A CN109273330B CN 109273330 B CN109273330 B CN 109273330B CN 201811366727 A CN201811366727 A CN 201811366727A CN 109273330 B CN109273330 B CN 109273330B
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- double
- contact
- energy storage
- matched
- plate
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- 238000004146 energy storage Methods 0.000 claims abstract description 51
- 238000009434 installation Methods 0.000 claims abstract description 35
- 239000011810 insulating material Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 3
- 230000007246 mechanism Effects 0.000 claims description 40
- 238000005192 partition Methods 0.000 claims description 29
- 239000002184 metal Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000010931 gold Substances 0.000 claims description 8
- 229910052737 gold Inorganic materials 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 5
- 230000003068 static effect Effects 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 230000002035 prolonged effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
-
- 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
- H01H9/52—Cooling of switch parts
Landscapes
- Breakers (AREA)
Abstract
A double-contact circuit breaker. The method is characterized in that: the heat-insulating energy storage piece adopts heat-insulating materials and is fixedly arranged between the two second installation side plates, a contact surface matched with the handle is formed at the upper end of the heat-insulating energy storage piece, positioning bosses matched with the second installation holes are formed on two sides of the heat-insulating energy storage piece, the positioning bosses are clamped into the second installation holes, and through holes concentric with the first installation holes are formed on the positioning bosses. Its advantage lies in thermal-insulated energy storage spare adopts insulating heat insulating material, the rotation axis passes thermal-insulated energy storage spare's perforation, separates with the moving contact support through thermal-insulated energy storage spare, reaches better thermal-insulated effect, avoids the rotation axis to be heated to damage the lever, improves double-contact circuit breaker life, simple structure moreover, simple to operate provides production efficiency.
Description
Technical Field
The invention relates to the field of piezoelectric devices, in particular to a double-contact breaker.
Background
A circuit breaker is a switching device capable of closing, carrying and breaking a current under normal circuit conditions and capable of closing, carrying and breaking a current under abnormal circuit conditions for a prescribed time.
The contact of the miniature circuit breaker usually adopts a single-contact structure, the structure is reliable in contact, high in electric stability and easy to adjust contact parameters, but when the miniature circuit breaker breaks short-circuit current, the contact is burnt and worn seriously, so that the breaking capacity of the single-contact structure is poor.
The existing contacts of the miniature circuit breaker also adopt a double-contact structure, namely, two pairs of moving and static contacts are arranged to jointly bear breaking current, so that breaking capacity is greatly improved.
However, as the breaking capacity of the double-contact structure is improved, the breaking current borne by the whole double-contact structure is increased, and the heat of the moving contact bracket can be directly transmitted to the lever through the rotating shaft, so that the lever is damaged, the service life of the circuit breaker is prolonged, and the double-contact miniature circuit breaker is more complicated in structure, difficult to assemble and low in production efficiency.
Disclosure of Invention
In order to overcome the defects of the background technology, the invention provides a double-contact breaker.
The invention adopts the technical scheme that: a double-contact breaker comprises a shell, and an operating mechanism, a fixed contact mechanism, a tripping mechanism, an arc extinguishing mechanism and a wiring terminal which are arranged in the shell; the operating mechanism comprises a handle, a U-shaped connecting rod, a lever, a jump buckle, a lock catch, a moving contact bracket and a double-contact moving contact; the handle and the lever are respectively and pivotally arranged on the shell, the jump buckle, the lock catch and the moving contact support are respectively and pivotally arranged on the lever, the handle and the jump buckle are connected through a U-shaped connecting rod, the jump buckle and the lock catch are respectively provided with a hasp surface suitable for locking the jump buckle and the lock catch, and the double-contact moving contact is fixedly arranged on the moving contact support; the operating mechanism further comprises a heat insulation energy storage piece, an energy storage spring and a rotating shaft, wherein first installation side plates are correspondingly formed on two sides of the lever, and first installation holes matched with the rotating shaft are correspondingly formed on the first installation side plates; the movable contact support is arranged between the two first mounting side plates and comprises a bottom plate and second mounting side plates correspondingly arranged at two sides of the bottom plate, and second mounting holes corresponding to the first mounting holes are formed in the second mounting side plates; the heat-insulating energy storage part is made of heat-insulating materials and is fixedly arranged between the two second installation side plates, a contact surface matched with the handle is formed at the upper end of the heat-insulating energy storage part, positioning bosses matched with the second installation holes are formed on two sides of the heat-insulating energy storage part, the positioning bosses are clamped into the second installation holes, and through holes concentric with the first installation holes are formed on the positioning bosses; the rotating shaft passes through the first mounting hole, the through hole and is mounted on the housing.
The energy storage spring adopts a double torsion spring; the two sides of the heat-insulating energy storage piece are provided with columns matched with the double torsion springs, the upper end of the second installation side plate is provided with a first limiting part in limiting fit with the lever, and the lower end of the second installation side plate is provided with a second limiting part in limiting fit with the torsion legs of the double torsion springs; and a third limiting part matched with the middle connecting rod of the double torsion spring is formed at the upper end of the lever.
The lever middle part is formed with first spacing groove, the jump knot be equipped with the first spacing boss of first spacing groove adaptation, first spacing boss tip is formed with first hasp face, the hasp be equipped with the spacing boss of the second of first spacing groove adaptation, second spacing boss tip be formed with first hasp face matched with second hasp face.
The shell comprises a shell and a middle partition board which separates the shell from the left and the right in the shell; the tripping mechanism comprises an electromagnetic tripping assembly, and the electromagnetic tripping assembly comprises a magnetic yoke with a U-shaped structure; the fixed contact mechanism comprises two fixed contacts which are respectively arranged at two sides of the middle partition plate, the two fixed contacts respectively correspond to two movable contacts of the double-contact movable contact, one fixed contact is fixedly arranged on the middle partition plate, and the other fixed contact is connected with the magnetic yoke; the mounting surface of the magnetic yoke matched with the static contact is arranged in a front-back dislocation way with the magnetic yoke.
The tripping mechanism further comprises a thermal tripping assembly, wherein the thermal tripping assembly comprises a double-gold sheet and a double-gold pull rod;
the middle partition plate is provided with a second limit groove, one end of the double-gold pull rod is connected with the lock catch, and the other end of the double-gold pull rod is arranged in the second limit groove and correspondingly matched with the double-gold sheet.
The arc extinguishing mechanisms are provided with two groups and are respectively arranged at two sides of the middle partition plate and correspond to the fixed contacts at two sides respectively; the arc extinguishing mechanism comprises an arc extinguishing cover, an arc striking piece and a magnetic conduction plate;
the magnetic conduction plate comprises two magnetic conduction sheets which are arranged in parallel, and a connecting sheet which connects the two magnetic conduction sheets;
each group of arc extinguishing mechanism further comprises two symmetrically arranged mounting plates, wherein one mounting plate is fixedly clamped between the middle partition plate and the fixed contact, the other mounting plate is fixedly clamped between the side wall of the shell and the fixed contact, and a slot matched with the magnetic conduction sheet is formed in the mounting plate;
the magnetic conduction plate is inserted into the slot through the magnetic conduction sheet to be fixedly matched with the mounting plate.
The bottom of the fixed contact is bent towards the direction of the arc extinguishing chamber and forms a U-shaped groove structure, and a limit boss matched with the U-shaped groove is formed on the side surface of the mounting plate facing the fixed contact; and the limiting boss is clamped with the U-shaped groove.
The arc striking piece is fixedly arranged on the middle partition plate and comprises an arc-shaped part, an upper connecting part and a lower connecting part at two ends of the arc-shaped part, and the upper connecting part and the arc-shaped part form a T-shaped structure;
the magnetic conduction sheet is provided with a groove corresponding to the upper connecting part, the arc part of the arc striking sheet is positioned between the two mounting plates, and the upper connecting part is clamped in the grooves of the two magnetic conduction sheets.
The middle partition plate is provided with a clamping groove which can be clamped with the lower connecting part and a clamping table which can be clamped with the upper connecting part, and the arc striking plate is clamped and fixed on the middle partition plate; the arc striking pieces on the two groups of arc extinguishing mechanisms are connected through the upper connecting parts to form an integrated structure, and the clamping table is clamped with the middle connecting part between the upper connecting parts of the two groups of arc striking pieces.
The beneficial effects of the invention are as follows: by adopting the scheme, the heat-insulating energy storage piece adopts the heat-insulating material, the rotation axis passes the perforation of heat-insulating energy storage piece, separates with the moving contact support through heat-insulating energy storage piece, reaches better thermal-insulated effect, avoids the rotation axis to be heated to damage the lever, improves double-contact circuit breaker life.
Drawings
Fig. 1 is a schematic structural diagram of a dual contact circuit breaker according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of an operating mechanism according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of the operating mechanism according to the embodiment of the present invention, in which the handle and the U-shaped link are omitted.
Fig. 4 is an exploded view of the operating mechanism of the present invention with the handle and the U-shaped link omitted.
Fig. 5 is a schematic structural view of a lever according to an embodiment of the present invention.
Fig. 6 is a schematic view of another angle of lever according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a moving contact support according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of an insulating energy storage member according to an embodiment of the present invention.
Fig. 9 is a schematic structural diagram of an energy storage spring according to an embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a jump buckle according to an embodiment of the present invention.
Fig. 11 is a schematic structural diagram of a latch according to an embodiment of the present invention.
Fig. 12 is a schematic structural diagram of an electromagnetic trip assembly according to an embodiment of the present invention.
Fig. 13 is a schematic structural view of a yoke according to an embodiment of the present invention.
Fig. 14 is an enlarged schematic view at a in fig. 1.
Fig. 15 is a schematic structural view of an intermediate partition plate according to an embodiment of the present invention.
Fig. 16 is a schematic structural view of an arc extinguishing mechanism according to an embodiment of the present invention.
Fig. 17 is a schematic diagram of a matching structure among the arc striking plate, the magnetic conduction plate, the mounting plate and the fixed contact according to the embodiment of the invention.
Fig. 18 is a schematic structural view of a circular arc striking plate according to an embodiment of the present invention.
Fig. 19 is a schematic structural diagram of a magnetic conductive plate according to an embodiment of the present invention.
Fig. 20 is a schematic structural view of a mounting plate according to an embodiment of the present invention.
Fig. 21 is a schematic structural diagram of a static contact according to an embodiment of the present invention.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings:
as shown in fig. 1, the double-contact circuit breaker comprises a shell 1, an operating mechanism 2, a fixed contact mechanism 3, a tripping mechanism 4, an arc extinguishing mechanism 5 and a wiring terminal 6 which are arranged in the shell.
Wherein the shell 1 comprises a shell and a middle partition plate 11 which separates the shell from the left and the right in the shell; the fixed contact mechanism 3 comprises two fixed contacts 31 respectively arranged at two sides of the middle partition plate 11.
As shown in fig. 2-11, the operating mechanism 2 comprises a handle 21, a U-shaped connecting rod 22, a lever 23, a jump button 24, a lock catch 25, a moving contact support 26, a double-contact moving contact 27, a heat insulation energy storage piece 28, an energy storage spring 29 and a rotating shaft 210; the handle 21 and the lever 23 are respectively and pivotally mounted on the housing 1, the jump button 24, the lock catch 25 and the moving contact support 26 are respectively and pivotally mounted on the lever 23, the handle 21 and the jump button 24 are connected through a U-shaped connecting rod 22, the jump button 24 and the lock catch 25 are respectively provided with a hasp surface suitable for locking the two, the double-contact moving contact 27 is fixedly mounted on the moving contact support 26 in a welding or riveting mode, the double-contact moving contact 27 is of a U-shaped structure, and two ends of the double-contact moving contact 27 are respectively arranged on two sides of the middle partition plate 11 and are provided with moving contacts corresponding to the two fixed contacts 31.
The two sides of the lever 23 are correspondingly provided with first mounting side plates 231, and the first mounting side plates 231 are correspondingly provided with first mounting holes 232 matched with the rotating shaft 210; the moving contact support 26 is disposed between the two first mounting side plates 231, and includes a bottom plate 261 and second mounting side plates 262 disposed corresponding to two sides of the bottom plate 261, and second mounting holes 263 corresponding to the first mounting holes 232 are formed in the second mounting side plates 262; the heat-insulating energy storage member 28 is made of heat-insulating material and is fixedly arranged between the two second installation side plates 262, a contact surface 281 matched with the handle 21 is formed at the upper end of the heat-insulating energy storage member 28, positioning bosses 282 matched with the second installation holes 263 are formed at two sides of the heat-insulating energy storage member 28, the positioning bosses 282 are clamped into the second installation holes 263, and through holes 283 concentric with the first installation holes 232 are formed on the positioning bosses 282; the rotation shaft 210 passes through the first mounting hole 232, the penetration hole 283 and is mounted on the housing 1.
The outer ring surface of the handle 21 is in contact fit with the contact surface 281 of the heat insulation energy storage piece 28, and a notch groove is formed on the outer ring of the handle 21.
The energy storage spring 29 adopts a double torsion spring; two sides of the heat insulation energy storage piece 28 are provided with columns 284, the end parts of the columns 284 are propped against the second installation side plate 262, the positioning boss 282 is arranged at the center of the end parts of the columns 284, and two coils of the energy storage spring 29 are respectively sleeved on the two columns 284; the upper end of the second mounting side plate 262 is provided with a first limiting part 264 in limiting fit with the lever 23, and the lower end is provided with a second limiting part 265 in matching with two torsion legs of the energy storage spring 29; the upper end of the lever 23 is formed with a third limit part 233 which is matched with the middle U-shaped connecting rod of the energy storage spring 29.
In the closing process, along with the rotation of the handle 21, the lever 23 can be driven to rotate through the U-shaped connecting rod 22 and the jump button 24, meanwhile, as the contact surface of the heat-insulating energy storage piece 28 is contacted with the handle 21, the action of the moving contact support 26 is limited, so that the compressed energy storage spring 29 can be used for storing energy, once the handle 21 is rotated in place and separated from the contact surface of the heat-insulating energy storage piece 28, the moving contact support 26 is rapidly rotated under the action of the elastic force of the energy storage spring 29, closing is realized, and meanwhile, the energy storage spring provides necessary over travel for the double-contact moving contact.
The heat-insulating energy storage member 28 is made of heat-insulating materials, the rotating shaft 210 penetrates through the through hole 283 of the heat-insulating energy storage member 28, and is isolated from the moving contact support 26 through the heat-insulating energy storage member 28, so that a good heat-insulating effect is achieved, the rotating shaft 210 is prevented from being heated to damage the lever 23, and the service life of the double-contact circuit breaker is prolonged.
Because the heat-insulating energy storage piece 28 and the movable contact support 26 adopt a split type structure, the energy storage spring 29 can adopt an integrally formed double torsion spring, and the assembly is more convenient and the structural performance is more stable compared with the use of two torsion springs.
In addition, the heat-insulating energy storage device further comprises a fixing shaft 211, wherein the fixing shaft 211 penetrates through the movable contact support 26 and the heat-insulating energy storage piece 28, and the rotating shaft 210 penetrates through the first mounting hole 232 and the through hole 283 to connect the heat-insulating energy storage piece 28 and the movable contact support 26 together, so that the heat-insulating energy storage piece is only connected through the fixing shaft 211 to realize two-point fixation, and the movable contact support 26 and the heat-insulating energy storage piece 28 are fixed together.
As shown in the drawing, a first limiting groove 234 is formed in the middle of the lever 23, the trip button 24 is provided with a first limiting boss 241 adapted to the first limiting groove 234, a first buckle surface 242 is formed at an end of the first limiting boss 241, the latch 25 is provided with a second limiting boss 251 adapted to the first limiting groove 234, and a second buckle surface 252 matched to the first buckle surface 242 is formed at an end of the second limiting boss 251.
Through the first limiting groove 234, the positions of the jump button 24 and the lock catch 25 can be limited, the jump deviation is avoided, the installation stability is guaranteed, meanwhile, the jump button 24 and the lock catch 25 are kept at the middle position, the overall stress is kept balanced, and the working performance is further guaranteed.
In addition, the lever 23 is further provided with an indication part 235 for indicating the opening and closing state, and the indication part can display different positions of the lever by different colors to provide an indication effect.
As shown in fig. 1, the trip mechanism 4 includes an electromagnetic trip assembly 41 and a thermal trip assembly 42.
The electromagnetic trip assembly 41, as shown in fig. 12, includes a yoke 411, a coil bracket, a static iron core, a push rod, and a return spring, where when a fault such as a short circuit occurs, the push rod pushes the lock catch to implement trip, and the specific structural principle is the prior art and will not be described herein. The magnetic yoke 411 is in a U-shaped structure as shown in fig. 13, the coil support is clamped on two side walls of the magnetic yoke 411, the magnetic yoke 411 is further formed with a mounting surface 412 connected with one of the fixed contacts 31, and the mounting surface 412 and the side walls of the magnetic yoke 411 form a front-back staggered structure, so that the magnetic yoke has enough space to connect the fixed contacts 31, and the space layout is more reasonable.
The thermal trip assembly 42 is shown in fig. 1 and 14, and includes a double-metal sheet 421, a double-metal spring Jin Lagan, a bonding sheet, and an adjusting screw, wherein one end of the double-metal spring Jin Lagan is connected with the trip button, and the other end of the double-metal spring Jin Lagan is connected with the double-metal sheet 421, and when an overload fault occurs, the double-metal sheet is deformed by heating, and the double-metal sheet Jin Lagan pulls the lock catch to implement trip.
The intermediate partition 11 is formed with a second limiting groove 111, and one end of the double Jin Lagan and the double gold plate 421, which is engaged with each other, is disposed in the second limiting groove 111, and the second limiting groove 111 is used for fixing and limiting, so that the double gold pull rod 422 can be stably mounted.
As shown in fig. 15-21, the arc extinguishing mechanism 5 is provided with two groups, and is respectively arranged at two sides of the middle partition board 11 and corresponds to the fixed contacts 31 at two sides respectively; the arc extinguishing mechanism 5 comprises an arc extinguishing chamber 51, an arc striking piece 52, a magnetic conduction plate 53 and two symmetrically arranged mounting plates 54.
The magnetic conductive plate 53 includes two parallel magnetic conductive sheets 531 and a connecting sheet 532 connecting the two magnetic conductive sheets 531; one of the mounting plates is fixedly clamped between the middle partition plate 11 and the fixed contact 31, the other mounting plate is fixedly clamped between the side wall of the shell and the fixed contact 31, and a slot 541 matched with the magnetic conducting piece 531 is formed on the mounting plate 54; the magnetic conductive plate 53 is inserted into the slot 541 via the magnetic conductive plate 531 to be fixedly matched with the mounting plate 54.
The magnetic conduction piece 531 directly realizes fixed cooperation with the mounting panel 54 through the mode of grafting buckle, simple structure, simple to operate can improve the work efficiency of equipment greatly.
The bottom of the fixed contact 31 is bent towards the direction of the arc extinguishing chamber 51 and forms a U-shaped groove 311 structure, and a limit boss 542 adapted to the U-shaped groove 311 is formed on the side surface of the mounting plate 54 facing the fixed contact 31; the limiting boss 542 is clamped with the U-shaped groove 311.
The bending structure of the fixed contact 31 not only can realize the arc striking function when the breaker breaks, but also can rapidly introduce the arc into the arc extinguishing chamber, and simultaneously can realize limit clamping with the mounting plate 54, thereby ensuring the rapid mounting of the mounting plate 54 and ensuring the firm mounting of the mounting plate 54.
The arc striking plate 52 is fixedly installed on the middle partition plate 11, and comprises an arc portion 521, and an upper connecting portion 522 and a lower connecting portion 523 at two ends of the arc portion 521, wherein the upper connecting portion 522 and the arc portion 521 form a T-shaped structure; the magnetic conductive sheet 531 is formed with a groove 533 corresponding to the upper connecting portion 522, and of course, the mounting plates 54 are correspondingly formed with a groove structure, the arc portion 521 of the arc striking sheet 52 is located between the two mounting plates 54, and the upper connecting portion 522 is clamped in the grooves 533 of the two magnetic conductive sheets 531.
The magnetic conduction plate 53 can be in stable clamping fit with the arc striking plate 52 through the groove 533 and the connecting sheet 532, so that the installation is convenient, and the stable installation of the magnetic conduction plate 53 is further ensured.
In addition, the middle partition 11 is provided with a clamping groove 112 which can be clamped with the lower connecting portion 223 and a clamping table 113 which can be clamped with the upper connecting portion 222, the arc striking plate 52 is clamped and fixed on the middle partition 11, and the arc striking plate 52 is mounted on the middle partition 11 in a clamping manner, so that the arc striking plate 52 is mounted more conveniently and rapidly.
Further, the arc striking pieces 52 on the two groups of arc extinguishing mechanisms 5 are connected through the upper connecting portions 522 to form an integrated structure, and the clamping table 113 is clamped with the middle connecting portions between the upper connecting portions 522 of the two groups of arc striking pieces 52, so that the clamping structure is simpler, and the clamping effect is better.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The skilled person will know: while the invention has been described in terms of the foregoing embodiments, the inventive concepts are not limited to the invention, and any modifications that use the inventive concepts are intended to be within the scope of the appended claims.
Claims (9)
1. A double-contact breaker comprises a shell (1), and an operating mechanism (2), a fixed contact mechanism (3), a tripping mechanism (4), an arc extinguishing mechanism (5) and a wiring terminal (6) which are arranged in the shell;
the operating mechanism (2) comprises a handle (21), a U-shaped connecting rod (22), a lever (23), a jump buckle (24), a lock catch (25), a moving contact bracket (26) and a double-contact moving contact (27); the handle (21) and the lever (23) are respectively and pivotally mounted on the shell (1), the jump button (24), the lock catch (25) and the moving contact support (26) are respectively and pivotally mounted on the lever (23), the handle (21) and the jump button (24) are connected through a U-shaped connecting rod (22), the jump button (24) and the lock catch (25) are respectively provided with a hasp surface suitable for locking the jump button (24) and the lock catch (25), and the double-contact moving contact (27) is fixedly mounted on the moving contact support (26);
the method is characterized in that: the operating mechanism (2) further comprises a heat insulation energy storage piece (28), an energy storage spring (29) and a rotating shaft (210), wherein first installation side plates (231) are correspondingly formed on two sides of the lever (23), and first installation holes (232) matched with the rotating shaft (210) are correspondingly formed in the first installation side plates (231);
the movable contact support (26) is arranged between two first installation side plates (231) and comprises a bottom plate (261) and second installation side plates (262) which are correspondingly arranged at two sides of the bottom plate (261), and second installation holes (263) corresponding to the first installation holes (232) are formed in the second installation side plates (262);
the heat-insulating energy storage part (28) is made of heat-insulating materials and is fixedly arranged between the two second installation side plates (262), a contact surface (281) matched with the handle (21) is formed at the upper end of the heat-insulating energy storage part (28), positioning bosses (282) matched with the second installation holes (263) are formed at two sides of the heat-insulating energy storage part (28), the positioning bosses (282) are clamped into the second installation holes (263), and through holes (283) concentric with the first installation holes (232) are formed on the positioning bosses (282);
the rotation shaft (210) passes through the first mounting hole (232), the through hole (283) and is mounted on the housing (1).
2. The double-contact circuit breaker according to claim 1, characterized in that: the energy storage spring (29) adopts a double torsion spring; two sides of the heat-insulating energy storage piece (28) are provided with columns (284) matched with the double torsion springs, the upper end of the second installation side plate (262) is provided with a first limit part (264) in limit fit with the lever (23), and the lower end of the second installation side plate is provided with a second limit part (265) matched with the torsion legs of the double torsion springs; the upper end of the lever (23) is provided with a third limit part (233) matched with the middle connecting rod of the double torsion spring.
3. The double-contact circuit breaker according to claim 1, characterized in that: the lever (23) middle part is formed with first spacing groove (234), jump knot (24) be equipped with first spacing boss (241) of first spacing groove (234) adaptation, first spacing boss (241) tip is formed with first hasp face (242), hasp (25) are equipped with the spacing boss (251) of second of first spacing groove (234) adaptation, second spacing boss (251) tip is formed with first hasp face (242) matched with second hasp face (252).
4. The double-contact circuit breaker according to claim 1, characterized in that: the shell (1) comprises a shell and a middle partition plate (11) which separates the shell from the left and the right in the shell;
the tripping mechanism (4) comprises an electromagnetic tripping assembly (41), and the electromagnetic tripping assembly (41) comprises a magnetic yoke (411) with a U-shaped structure;
the fixed contact mechanism (3) comprises two fixed contacts (31) which are respectively arranged at two sides of the middle partition plate (11), the two fixed contacts (31) respectively correspond to two movable contacts of the double-contact movable contact (27), one fixed contact is fixedly arranged on the middle partition plate (11), and the other fixed contact is connected with the magnetic yoke (411);
a mounting surface (412) of the magnetic yoke (411) matched with the static contact is arranged in a front-back dislocation way with the magnetic yoke (411).
5. The double-contact circuit breaker according to claim 4, wherein: the tripping mechanism (4) further comprises a thermal tripping assembly (42), and the thermal tripping assembly (42) comprises a double-metal sheet (421) and a double-metal sheet (Jin Lagan) (422);
the middle partition plate (11) is provided with a second limit groove (111), one end of the double Jin Lagan (422) is connected with the lock catch (25), and the other end of the double Jin Lagan is arranged in the second limit groove (111) and correspondingly matched with the double gold plates (421).
6. The double-contact circuit breaker according to claim 4, wherein: the arc extinguishing mechanisms (5) are provided with two groups, are respectively arranged at two sides of the middle partition plate (11) and respectively correspond to the fixed contacts (31) at two sides; the arc extinguishing mechanism (5) comprises an arc extinguishing cover (51), an arc striking piece (52) and a magnetic conduction plate (53);
the magnetic conduction plate (53) comprises two magnetic conduction sheets (531) which are arranged in parallel, and a connecting sheet (532) which is connected with the two magnetic conduction sheets (531);
each group of arc extinguishing mechanisms (5) further comprises two symmetrically arranged mounting plates (54), wherein one mounting plate is fixedly clamped between the middle partition plate (11) and the fixed contact (31), the other mounting plate is fixedly clamped between the side wall of the shell and the fixed contact (31), and a slot (541) matched with the magnetic conducting sheet (531) is formed on the mounting plate (54);
the magnetic conduction plate (53) is inserted into the slot (541) through the magnetic conduction sheet (531) to be fixedly matched with the mounting plate (54).
7. The double-contact circuit breaker according to claim 6, characterized in that: the bottom of the fixed contact (31) is bent towards the direction of the arc extinguishing chamber (51) and forms a U-shaped groove (311) structure, and a limit boss (542) matched with the U-shaped groove (311) is formed on the side surface of the mounting plate (54) facing the fixed contact (31); and the limit boss (542) is clamped with the U-shaped groove (311).
8. The double-contact circuit breaker according to claim 6, characterized in that: the arc striking piece (52) is fixedly arranged on the middle partition plate (11) and comprises an arc-shaped part (521), an upper connecting part (522) and a lower connecting part (523) at two ends of the arc-shaped part (521), and the upper connecting part (522) and the arc-shaped part (521) form a T-shaped structure;
the magnetic conduction piece (531) is provided with a groove (533) corresponding to the upper connecting part (522), the arc-shaped part (521) of the arc-shaped striking piece (52) is positioned between the two mounting plates (54), and the upper connecting part (522) is clamped in the grooves (533) of the two magnetic conduction pieces (531).
9. The double-contact circuit breaker of claim 8, wherein: the middle partition plate (11) is provided with a clamping groove (112) which can be clamped with the lower connecting part (523) and a clamping table (113) which can be clamped with the upper connecting part (522), and the arc striking plate (52) is clamped and fixed on the middle partition plate (11);
the arc striking pieces (52) on the two groups of arc extinguishing mechanisms (5) are connected through the upper connecting parts (522) to form an integrated structure, and the clamping table (113) is clamped with the middle connecting part between the upper connecting parts (522) of the two groups of arc striking pieces (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811366727.6A CN109273330B (en) | 2018-11-16 | 2018-11-16 | Double-contact breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811366727.6A CN109273330B (en) | 2018-11-16 | 2018-11-16 | Double-contact breaker |
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| Publication Number | Publication Date |
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| CN109273330A CN109273330A (en) | 2019-01-25 |
| CN109273330B true CN109273330B (en) | 2024-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811366727.6A Active CN109273330B (en) | 2018-11-16 | 2018-11-16 | Double-contact breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI821036B (en) * | 2022-11-22 | 2023-11-01 | 士林電機廠股份有限公司 | Miniature circuit breaker dual independent circuit mechanism |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104134588A (en) * | 2014-07-17 | 2014-11-05 | 正泰集团股份有限公司 | Operation device of miniature multi-pole circuit breaker |
| KR20160117072A (en) * | 2015-03-31 | 2016-10-10 | 현대중공업 주식회사 | Cover of mccb with radiant heat structure |
| CN209071238U (en) * | 2018-11-16 | 2019-07-05 | 加西亚电子电器股份有限公司 | A kind of double-contact breaker |
-
2018
- 2018-11-16 CN CN201811366727.6A patent/CN109273330B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104134588A (en) * | 2014-07-17 | 2014-11-05 | 正泰集团股份有限公司 | Operation device of miniature multi-pole circuit breaker |
| KR20160117072A (en) * | 2015-03-31 | 2016-10-10 | 현대중공업 주식회사 | Cover of mccb with radiant heat structure |
| CN209071238U (en) * | 2018-11-16 | 2019-07-05 | 加西亚电子电器股份有限公司 | A kind of double-contact breaker |
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| CN109273330A (en) | 2019-01-25 |
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