CN112885655A - Fixed knot of circuit breaker arc extinguishing module and base constructs and circuit breaker - Google Patents
Fixed knot of circuit breaker arc extinguishing module and base constructs and circuit breaker Download PDFInfo
- Publication number
- CN112885655A CN112885655A CN201911199323.7A CN201911199323A CN112885655A CN 112885655 A CN112885655 A CN 112885655A CN 201911199323 A CN201911199323 A CN 201911199323A CN 112885655 A CN112885655 A CN 112885655A
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- CN
- China
- Prior art keywords
- base
- arc extinguishing
- extinguishing module
- circuit breaker
- assembly
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- 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
-
- 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
- H01H71/08—Terminals; Connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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Abstract
The invention relates to a fixing structure of an arc extinguishing module and a base of a circuit breaker and the circuit breaker, which comprises the base, a wiring terminal component and an arc extinguishing module component, wherein the arc extinguishing module component is arranged in an accommodating cavity of the base; the wiring terminal assembly is provided with a clamping interface, the wiring terminal assembly is horizontally inserted into the base, and after the wiring terminal assembly is installed in place, the clamping interface simultaneously clamps the arc extinguishing module boss and the base flange. Compared with the prior art, the structural design of the invention is beneficial to reducing the overall height of the molded case circuit breaker, and has positive significance for the design of the circuit breaker with a small case under the miniaturization trend of the molded case circuit breaker.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a circuit breaker and a fixing structure of an arc extinguishing module and a base of the circuit breaker.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. The circuit breaker can be used for distributing electric energy, starting an asynchronous motor infrequently, protecting a power supply circuit, a motor and the like, automatically cutting off a circuit when faults such as serious overload, short circuit, undervoltage and the like occur, has the function equivalent to the combination of a fuse type switch, an over-under-heat relay and the like, and generally does not need to change parts after breaking fault current.
In the structure of the existing circuit breaker, an insert or a nut (as shown in fig. 1) is usually placed in the center of an arc extinguishing module, a mounting hole is formed in the bottom of a base, the module is fixed on the base through a screw when the module is fixed, and the screw and the nut occupy partial space of the module or the base in the module fixing mode, so that the overall height of the circuit breaker is increased to a certain extent.
Disclosure of Invention
The invention aims to solve the problems and provides a fixing structure of an arc extinguishing module and a base of a circuit breaker, which is beneficial to reducing the overall height of a molded case circuit breaker and has positive significance for the design of a circuit breaker driven by a small case under the miniaturization trend of the molded case circuit breaker.
The purpose of the invention is realized by the following technical scheme:
a fixing structure of an arc extinguishing module and a base of a circuit breaker comprises the base, a wiring terminal assembly and an arc extinguishing module assembly, wherein the arc extinguishing module assembly is installed in an accommodating cavity of the base, the wiring terminal assembly is inserted at two ends of the base, a base flange is arranged at one end of the bottom in the base, an arc extinguishing module boss is arranged at the front end of the arc extinguishing module assembly, the arc extinguishing module assembly is installed in the base, and after the arc extinguishing module assembly is installed in place, the arc extinguishing module boss is located at the upper part of the base flange and is flush with the base flange; the wiring terminal assembly is provided with a clamping interface, the wiring terminal assembly is horizontally inserted into the base, and after the wiring terminal assembly is installed in place, the clamping interface simultaneously clamps the arc extinguishing module boss and the base flange.
The wiring terminal subassembly blocks arc extinguishing module boss and base flange simultaneously, makes both can't throw off in the direction of height, and wiring terminal subassembly, arc extinguishing module subassembly, base have formed the interlocking like this, can not loosen naturally and take off, and this kind of interlocking structural design avoids design nut mounted position or inserts in arc extinguishing module subassembly, has reduced the overall height of arc extinguishing module design, realizes miniaturized design.
Furthermore, a connecting lug is arranged at the bottom of the base, a connecting part matched with the connecting lug is arranged at the bottom of the wiring terminal assembly, a connecting hole is formed in the connecting part, and the connecting hole is sleeved on the connecting lug to realize the fixed connection of the wiring terminal assembly and the base.
Furthermore, the connecting lug is cylindrical, the connecting part is elastic sheet-shaped and can be made of plastic, the connecting hole is a round hole matched with the cylindrical part, and after the connecting lug is installed in place, the sheet at the bottom of the wiring terminal component enables the round hole to be sleeved on the cylindrical boss of the base through the elasticity of the plastic, so that the sheet is limited in the horizontal direction and cannot be loosened along the base.
Furthermore, the arc extinguishing module assembly is of a multi-stage structure and consists of a plurality of arc extinguishing module units; the wiring terminal assembly is composed of a plurality of wiring terminal units, and the wiring terminal units are arranged in one-to-one correspondence with the arc extinguishing module units.
Furthermore, the two ends of the outer portion of the base are provided with opening cavities for containing the wiring terminal units, guide grooves are formed in the wall surfaces of the opening cavities, the wiring terminal units are provided with guide ribs matched with the guide grooves, and the wiring terminal units are inserted into the base along the guide grooves in the horizontal direction.
Furthermore, a pressing plate is arranged at the rear end of the arc extinguishing module assembly and fixed on the base through a connecting piece, and the rear end of the arc extinguishing module assembly is fixed on the base through the pressing plate.
Furthermore, the length of the pressing plate is consistent with the total width of the arc extinguishing module assembly, the pressing plate is a rectangular plate, and a plurality of partition plates are arranged on the lower portion of the pressing plate, so that the arc extinguishing module assembly can form an independent air outlet channel to play an insulating role in separating the arc extinguishing module assembly from each other.
Furthermore, the connecting piece is nut and screw, be equipped with a plurality of hexagonal counter bores that can hold the nut on the clamp plate, the screw follows the base bottom with the nut is connected, fastens the clamp plate on the base, makes the clamp plate both play and provides arc extinguishing module subassembly air outlet channel, carries out alternately to cut off the insulation again, plays the effect of pushing down arc extinguishing module subassembly rear portion again simultaneously.
Furthermore, the clamping interface of the wiring terminal component is a C-shaped opening, and the arc extinguishing module boss and the base flange are clamped simultaneously, so that the arc extinguishing module boss and the base flange cannot be separated in the height direction.
The circuit breaker is characterized by comprising a fixing structure of the circuit breaker arc extinguishing module and a base.
The specific working principle of the invention is that the front part of the arc extinguishing module assembly is fixed on the base through the interlocking design of the wiring terminal assembly, the arc extinguishing module assembly and the base, so that the design of a nut mounting position or an insert in the arc extinguishing module assembly is avoided, and the height of the arc extinguishing module assembly can be effectively reduced; meanwhile, the space between the phases is utilized, and the pressing plate and the base screw are connected to the base to fix the rear part of the arc extinguishing module assembly.
The structure is beneficial to reducing the overall height of the molded case circuit breaker, and has positive significance for the design of the circuit breaker driven by a small case under the miniaturization trend of the molded case circuit breaker.
Compared with the prior art, the invention has the following beneficial effects:
(1) the invention adopts the part interlocking design, does not need to design the nut installation position or an insert in the arc extinguishing module assembly, reduces the overall height of the arc extinguishing module design and realizes the miniaturization design.
(2) The arc extinguishing module assembly is generally made of thermosetting materials, and the invention does not design screws and nuts in the module for fastening, thereby avoiding local material fracture when the module is installed on the base and screwed tightly.
(3) According to the invention, the modules are fixed on the base at the front part and the rear part of the arc extinguishing module assembly, but not on the arc extinguishing module assembly and the base, and the holes which are fastened and connected are designed at the corresponding parts, so that the physical strength of the core part in the middle of the arc extinguishing module is increased, and the probability of module damage and base cracking caused by high-strength air pressure impact on the breaker in the large-current short-circuit breaking process is reduced.
(4) The pressing plate plays a role in fixing the arc extinguishing module assembly and also plays a role in interphase insulation, and meanwhile, the function of providing an air outlet channel for the arc extinguishing module is effectively realized.
Drawings
Fig. 1 is a schematic view of a fixing structure of an arc extinguishing module and a base of a conventional circuit breaker;
fig. 2 is an exploded view of a fixing structure of an arc extinguishing module and a base of a circuit breaker according to an embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 4 is a top view of an embodiment of the present invention;
FIG. 5 is a bottom view of an embodiment of the present invention;
FIG. 6 is a partial schematic view of a terminal assembly, an arc extinguishing module and a base according to an embodiment of the invention;
FIG. 7 is a schematic view of a wire terminal assembly of an embodiment of the present invention installed;
FIG. 8 is a schematic view of a platen installation according to an embodiment of the present invention;
in the figure: 1-a wiring terminal component, 101-a card interface, 102-a connecting part, 103-a guide rib; 2-arc extinguishing module assembly, 201-arc extinguishing module boss, 202-air outlet channel, 3-base, 301-base flange, 302-opening chamber, 303-guide groove, 4-pressing plate, 401-partition plate; 5-screw, 6-nut.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
Fig. 1 is a schematic diagram of a fixing structure of an arc extinguishing module and a base of an existing circuit breaker, an insert or a nut 6 is usually placed in the center of an arc extinguishing module assembly 2, a mounting hole is formed in the bottom of the base, the arc extinguishing module assembly 2 is fixed on the base 3 through a screw 5 when the module is fixed, and the screw and the nut occupy partial space of the module or the base in the module fixing form, so that the overall height of the circuit breaker is increased, and the miniaturization design of a molded case circuit breaker is not facilitated.
The invention provides a fixing structure of a circuit breaker arc extinguishing module and a base, and as shown in figures 2-5, the fixing structure comprises a base 3, a wiring terminal component 1 and an arc extinguishing module component 2, wherein the arc extinguishing module component 2 is arranged in an accommodating cavity of the base 3, and the wiring terminal component 1 is inserted at two ends of the base 3.
The molded case circuit breaker generally has two poles, three poles, four poles and other structures, the arc extinguishing module assembly is composed of a plurality of arc extinguishing module units, the wiring terminal assembly 1 is composed of a plurality of groups of wiring terminal units, the wiring terminal units and the arc extinguishing module units are arranged in a one-to-one correspondence manner, and the four poles are taken as an example in the embodiment (the four-pole circuit breaker comprises A, B, C, N four phases).
An opening cavity 302 for containing a wiring terminal unit is arranged at two ends of the outer portion of the base 3, a guide groove 303 is arranged on the wall surface of the opening cavity 302, a guide rib 103 matched with the guide groove 303 is arranged on the wiring terminal unit, and the wiring terminal unit is inserted into the base 3 along the horizontal direction along the guide groove 303. The bottom of the base 3 is provided with a cylindrical connecting lug, the bottom of the wiring terminal assembly 1 is provided with a connecting part 102 matched with the connecting lug and made of plastic elastic sheets, the connecting part 102 is provided with a connecting hole, and the connecting hole is sleeved on the connecting lug to realize the fixed connection of the wiring terminal assembly 1 and the base 3.
The arc extinguishing module component 2 is fixedly arranged on the base 3 through the following design:
as shown in fig. 6 and 7, the four-phase arc extinguishing module assemblies are all installed in the base 3, after the four-phase arc extinguishing module assemblies are installed in place, the arc extinguishing module bosses 201 are aligned with the base flange 301, the wiring terminal assembly 1 is inserted into the base 3 along the horizontal direction along the guide groove 303 in the front of the base 3, and meanwhile, the C-shaped clamping interface 101 of the wiring terminal assembly 1 can simultaneously clamp the arc extinguishing module bosses 201 and the base flange 301, so that the four-phase arc extinguishing module assemblies cannot be separated from each other in the height direction; after the sheet is installed in place, the hole of the sheet at the bottom of the wiring terminal assembly 1 is sleeved on the circular boss of the base 3 by virtue of plastic elasticity, so that the sheet is limited in the horizontal direction and cannot be released out along the guide groove 303 of the base 3. Thus, the wiring terminal assembly 1, the arc extinguishing module assembly 2 and the base 3 are interlocked and cannot be loosened naturally.
As shown in fig. 8, the pressing plate 4 is installed in the base 3, the length of the pressing plate 4 is consistent with the total width of the arc extinguishing module assembly 2, the pressing plate 4 is a rectangular plate, and a plurality of partition plates 401 are arranged on the lower portion of the pressing plate 4, so that each phase of the arc extinguishing module assembly 2 can form an independent air outlet channel 202, and the function of insulating the phases is achieved. Pressing plate 4 utilizes alternate clearance, at each alternate hexagonal counter bore of design (for example, there are 3 counter bores in the alternate of level four), can hold hexagon nut 6 in the counter bore, its effect lies in installing base 3 and covering four-phase arc extinguishing module subassembly 2 back when the clamp plate, fixes the clamp plate on base 3 through screw 5 to make clamp plate 4 both play and provide arc extinguishing module subassembly 2 outlet channel, carry out alternate wall again and insulate, play the effect of pushing down arc extinguishing module subassembly 2 rear portion again simultaneously.
The structure is beneficial to reducing the overall height of the molded case circuit breaker, and has positive significance for the design of the circuit breaker driven by a small case under the miniaturization trend of the molded case circuit breaker.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. A fixing structure of a circuit breaker arc extinguishing module and a base comprises a base (3), a wiring terminal component (1) and an arc extinguishing module component (2), wherein the arc extinguishing module component (2) is arranged in a containing cavity of the base (3), the wiring terminal component (1) is inserted at two ends of the base (3), and the fixing structure is characterized in that,
a base flange (301) is arranged at one end of the bottom in the base (3), an arc extinguishing module boss (201) is arranged at the front end of the arc extinguishing module assembly (2), the arc extinguishing module assembly (2) is installed in the base (3), and after the arc extinguishing module assembly is installed in place, the arc extinguishing module boss (201) is located at the upper part of the base flange (301) and is parallel to the base flange;
the arc extinguishing module is characterized in that a clamping interface (101) is arranged on the wiring terminal assembly (1), the wiring terminal assembly (1) is horizontally inserted into the base (3), and after the wiring terminal assembly is installed in place, the clamping interface (101) simultaneously clamps the arc extinguishing module boss (201) and the base flange (301).
2. The fixing structure of the arc extinguishing module and the base of the circuit breaker according to claim 1, wherein a connecting bump is disposed at the bottom of the base (3), a connecting portion (102) matching with the connecting bump is disposed at the bottom of the terminal assembly (1), the connecting portion (102) is provided with a connecting hole, and the connecting hole is sleeved on the connecting bump to fixedly connect the terminal assembly (1) and the base (3).
3. The fixing structure of the arc extinguishing module and the base of the circuit breaker according to claim 2, characterized in that the connecting projection is cylindrical, the connecting portion (102) is a flexible sheet, and the connecting hole is a circular hole matching with the cylindrical shape.
4. The fixing structure of the circuit breaker arc extinguishing module and the base as claimed in claim 1, characterized in that the arc extinguishing module assembly (2) is a multi-stage structure composed of a plurality of arc extinguishing module units; the wiring terminal assembly (1) is composed of a plurality of wiring terminal units, and the wiring terminal units are arranged in one-to-one correspondence with the arc extinguishing module units.
5. A fixing structure of an arc extinguishing module and a base of a circuit breaker according to claim 4, characterized in that the base (3) is provided with an open chamber (302) at two outer ends for accommodating the terminal unit, the wall surface of the open chamber (302) is provided with a guide groove (303), the terminal unit is provided with a guide rib (103) matched with the guide groove (303), and the terminal unit is inserted into the base (3) along the guide groove (303) along a horizontal direction.
6. A fixing structure of a circuit breaker arc-extinguishing module and a base according to any one of claims 1-5, characterized in that a pressing plate (4) is arranged at the rear end of the arc-extinguishing module assembly (2), the pressing plate (4) is fixed on the base (3) through a connecting piece, and the pressing plate (4) fixes the rear end of the arc-extinguishing module assembly (2) on the base.
7. The fixing structure of the arc extinguishing module and the base of the circuit breaker according to claim 6, characterized in that the length of the pressing plate (4) is consistent with the total width of the arc extinguishing module assembly (2), the pressing plate (4) is a rectangular plate, and a plurality of partition plates (401) are arranged at the lower part of the pressing plate (4), so that the arc extinguishing module assembly (2) can form an independent air outlet channel (202) at each phase.
8. The fixing structure of the circuit breaker arc extinguishing module and the base as claimed in claim 6, wherein the connecting member is a nut (6) and a screw (5), the pressing plate (4) is provided with a plurality of counter bores capable of accommodating the nut, and the screw is connected with the nut from the bottom of the base (3) to fasten the pressing plate (4) on the base (3).
9. The fixing structure of the arc extinguishing module and the base of the circuit breaker according to claim 1, characterized in that the clip interface (101) of the terminal assembly (1) is a C-shaped opening, and simultaneously the arc extinguishing module boss (201) and the base flange (301) are clamped, so that the two can not be separated in the height direction.
10. A circuit breaker with a circuit breaker arc extinguishing module and base securing structure according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911199323.7A CN112885655A (en) | 2019-11-29 | 2019-11-29 | Fixed knot of circuit breaker arc extinguishing module and base constructs and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911199323.7A CN112885655A (en) | 2019-11-29 | 2019-11-29 | Fixed knot of circuit breaker arc extinguishing module and base constructs and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112885655A true CN112885655A (en) | 2021-06-01 |
Family
ID=76039291
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911199323.7A Pending CN112885655A (en) | 2019-11-29 | 2019-11-29 | Fixed knot of circuit breaker arc extinguishing module and base constructs and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112885655A (en) |
-
2019
- 2019-11-29 CN CN201911199323.7A patent/CN112885655A/en active Pending
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