CN212783339U - Tripping mechanism of circuit breaker - Google Patents
Tripping mechanism of circuit breaker Download PDFInfo
- Publication number
- CN212783339U CN212783339U CN202021622408.XU CN202021622408U CN212783339U CN 212783339 U CN212783339 U CN 212783339U CN 202021622408 U CN202021622408 U CN 202021622408U CN 212783339 U CN212783339 U CN 212783339U
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- circuit breaker
- bimetallic strip
- energy storage
- trip
- iron core
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Abstract
The utility model relates to a circuit breaker dropout technical field specifically is a tripping device of circuit breaker, include: magnetism trip assembly and thermal trip assembly, magnetism trip assembly include fixed mounting in the inside iron core of circuit breaker and twine in the outside coil of iron core, iron core one end activity is provided with moves armature, moves the fixed energy storage piece that is provided with in armature one side, and thermal trip assembly includes fixed mounting in the inside bimetallic strip of circuit breaker, is provided with the fixed plate between bimetallic strip and the flash barrier, and fixed plate one side is provided with the adjusting screw who is used for adjusting the bimetallic strip, the utility model discloses a set up magnetism trip assembly, bimetallic trip assembly, armature and energy storage piece, magnetism trip assembly and bimetallic assembly homoenergetic promote the energy storage piece when the circuit medium current is too big with the circuit disconnection, have avoided leading to the circuit breaker can not accurate circuit breaking because set up when single tripping device goes wrong.
Description
Technical Field
The utility model relates to a circuit breaker dropout technical field specifically is a tripping device of circuit breaker.
Background
The low-voltage circuit breaker generally comprises a release, a contact system, an arc-extinguishing device, a transmission mechanism, a pedestal, a shell and the like, wherein when the low-voltage circuit breaker is put into operation, an operating handle closes a main contact, a free release mechanism locks the main contact at a closed position, and various releases enter an operation state;
most of the existing circuit breakers are only provided with a tripping mechanism, when a short-circuit fault occurs in a circuit, the tripping mechanism can play a role of cutting off a power supply, but if only one tripping mechanism is arranged, when the tripping mechanism cannot normally operate due to the fault, the tripping mechanism can possibly cut off the power supply, and finally a circuit is damaged.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a tripping device of circuit breaker to solve the problem that proposes among the above-mentioned background art.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a trip mechanism for a circuit breaker, comprising: magnetic trip subassembly and thermal trip subassembly, the magnetic trip subassembly includes fixed mounting in the inside iron core of circuit breaker and twines in the outside coil of iron core, iron core one end activity is provided with moves armature, it is fixed to be provided with energy storage spare to move armature one side, the thermal trip subassembly includes fixed mounting in the inside bimetallic strip of circuit breaker, be provided with the fixed plate between bimetallic strip and the flash barrier, fixed plate one side is provided with the adjusting screw who is used for adjusting the bimetallic strip.
Furthermore, the movable armature and the energy storage element are connected in a hasp mode.
Furthermore, the energy storage part is integrally provided with two trip rods, one end of one trip rod, which is far away from the energy storage part, is in transmission connection with the supporting part of the moving contact, and the other trip rod is positioned at the bottom of one end of the bimetallic strip.
Furthermore, one ends of the two trip rods, which are far away from the energy storage piece, are arc-shaped.
Furthermore, the bimetallic strip and the fixing plate are fixedly connected by welding or riveting or a combination of the welding and the riveting.
Furthermore, adjusting screw threaded connection is in circuit breaker inside on the flash barrier, the one end that adjusting screw is close to the bimetallic strip is arc.
Compared with the prior art, the utility model provides a tripping device of circuit breaker possesses following beneficial effect:
1. the utility model discloses, through setting up magnetism trip unit, bimetal trip unit, under the cooperation use of armature and energy storage spare, when taking place the short circuit in the circuit when passing through normal current in the circuit, the electromagnetic force that the iron core produced is less than the reaction, the pulling force of power spring, the street iron can not be inhaled by the iron core, circuit breaker normal operating, at this moment, heating element generates heat makes the bimetallic strip crooked to the fixed degree and reaches dynamic balance state, the bimetallic strip no longer continues the bending, when the short-circuit fault appears in the circuit, the electric current exceeds a plurality of times of normal current, the electromagnetic force that the iron core produced is greater than the effort of reaction force spring, armature is inhaled by the iron core and promotes free tripping device through the energy storage spare and releases the main contact, the main contact separates the cutoff circuit under the effect of separating brake spring, simultaneously, the bimetallic strip will continue the bending, promote free tripping device through the energy storage spare and release, the main contacts are separated under the action of the opening spring, the cut-off circuit plays a role in overload protection, and the magnetic tripping component and the bimetallic component can push the energy storage component to break the circuit when the current in the circuit is too large, so that the problem that the circuit breaker cannot accurately break the circuit due to the fact that a single tripping mechanism is arranged is avoided;
2. the utility model, by arranging the adjusting screw, the flexibility of the bimetallic strip can be conveniently adjusted, thereby ensuring that the bimetallic strip can sufficiently push the energy storage element to a proper position after being heated;
3. the utility model discloses, through setting up the fixed plate, can stabilize the bimetallic strip and install in the circuit breaker, improved the stability of bimetallic strip work.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of a connection structure of the movable armature and the energy storage member of the present invention.
In the figure: 1-an iron core; 2-a coil; 3-moving armature; 4-an energy storage member; 401-trip lever; 5-bimetallic strip; 6, fixing a plate; 7-adjusting the screw.
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 work belong to the protection scope of the present invention.
Example (b): referring to fig. 1 to 2, the present invention provides a technical solution: a trip mechanism for a circuit breaker, comprising: the magnetic trip assembly comprises an iron core 1 fixedly arranged in the breaker and a coil 2 wound outside the iron core 1, one end of the iron core 1 is movably provided with a movable armature 3, one side of the movable armature 3 is fixedly provided with an energy storage part 4, the thermal trip assembly comprises a bimetallic strip 5 fixedly arranged in the breaker, a fixing plate 6 is arranged between the bimetallic strip 5 and an arc-isolating plate, one side of the fixing plate 6 is provided with an adjusting screw 7 for adjusting the bimetallic strip 5, the movable armature 3 and the energy storage part 4 are connected in a hasp mode, the energy storage part 4 is integrally provided with two trip rods 401, one end of one trip rod 401, which is far away from the energy storage part 4, is in transmission connection with a support part of the movable contact, the other trip rod 401 is positioned at the bottom of one end of the bimetallic strip 5, one ends of the two trip rods 401, which are far away from the energy storage part 4, by arranging the magnetic trip assembly, the bimetallic trip assembly, the armature 3 and the energy storage element 4, when normal current passes through a circuit when short circuit occurs in the circuit, the electromagnetic force generated by the iron core 1 is smaller than the reaction force, the electromagnet 3 cannot be attracted by the iron core 1 by the tension of the force spring, the circuit breaker normally operates, at the moment, the heating element generates heat to bend the bimetallic strip 5 to a certain degree and reach a dynamic balance state, the bimetallic strip 5 is not bent continuously any more, when short circuit fault occurs in the circuit, the current exceeds a plurality of times of the normal current, the electromagnetic force generated by the iron core 1 is larger than the acting force of the reaction force spring, the armature 3 is attracted by the iron core 1, the free trip mechanism is pushed by the energy storage element 4 to release a main contact, the main contact is separated to cut off the circuit under the action of the separating spring, meanwhile, the bimetallic strip 5 is bent continuously, and the free trip mechanism is pushed by the energy, the main contact separates under the effect of separating brake spring, and the circuit breaker plays overload protection's effect, and magnetism trip assembly and bimetal component homoenergetic promote energy storage component 4 when the electric current is too big in the circuit and break off the circuit, have avoided leading to the circuit breaker can not accurate circuit breaker owing to set up when single tripping device goes wrong.
Wherein, adopt welding or riveting or the two carries out fixed connection with the mode between bimetallic strip 5 and the fixed plate 6, through setting up fixed plate 6, can stabilize bimetallic strip 5 and install in the circuit breaker, improved the stability of bimetallic strip 5 work.
Wherein, adjusting screw 7 threaded connection is on the inside flash barrier of circuit breaker, and adjusting screw 7 is arc near the one end of bimetallic strip 5, through setting up adjusting screw 7, is convenient for adjust bimetallic strip 5's crookedness to this guarantees that bimetallic strip 5 is enough to push away energy storage 4 to suitable position after being heated.
The working principle is as follows: in the use process of the utility model, when the circuit is short-circuited, the electromagnetic force generated by the iron core 1 is smaller than the reaction, the tension of the force spring is used, the street iron 3 can not be attracted by the iron core 1, the circuit breaker normally operates, at the moment, the heating element generates heat to bend the bimetallic strip 5 to a certain degree and reach the dynamic balance state, the bimetallic strip 5 can not be bent continuously, when the circuit is short-circuited, the current is several times larger than the normal current, the electromagnetic force generated by the iron core 1 is larger than the acting force of the reaction force spring, the armature 3 is attracted by the iron core 1, the free tripping mechanism is pushed by the energy storage part 4 to release the main contact, the main contact is separated under the action of the opening spring to cut off the circuit, meanwhile, the bimetallic strip 5 can be bent continuously, the free tripping mechanism is pushed by the energy storage part 4 to release the main contact, the main contact is separated under the action, the effect that the cutoff circuit played overload protection, magnetism trip unit and bimetallic assembly homoenergetic promote energy storage component 4 when the circuit current is too big with the circuit disconnection, avoided leading to the circuit breaker can not accurate circuit breaking accurately when setting up single tripping device and going wrong, through setting up fixed plate 6, can install bimetallic strip 5 firm in the circuit breaker, the stability of bimetallic strip 5 work has been improved, through setting up adjusting screw 7, be convenient for adjust bimetallic strip 5 crookedness, guarantee with this that bimetallic strip 5 is enough to push away energy storage component 4 to suitable position after being heated.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A trip mechanism for a circuit breaker, comprising: magnetic tripping subassembly and thermal tripping subassembly, its characterized in that: magnetism trip assembly includes iron core (1) of fixed mounting in the inside of circuit breaker and twines in coil (2) of iron core (1) outside, iron core (1) one end activity is provided with moves armature (3), it is fixed in energy storage spare (4) to move armature (3) one side, heat trip assembly includes fixed mounting in the inside bimetallic strip (5) of circuit breaker, be provided with between bimetallic strip (5) and the flash barrier fixed plate (6), fixed plate (6) one side is provided with adjusting screw (7) that are used for adjusting bimetallic strip (5).
2. The trip mechanism of a circuit breaker of claim 1, wherein: the movable armature (3) and the energy storage element (4) are connected in a hasp mode.
3. The trip mechanism of a circuit breaker of claim 1, wherein: the energy storage part (4) is integrally provided with two trip rods (401), one end of each trip rod (401), which is far away from the energy storage part (4), is in transmission connection with the supporting part of the moving contact, and the other trip rod (401) is positioned at the bottom of one end of the bimetallic strip (5).
4. A trip mechanism for a circuit breaker as claimed in claim 3, wherein: and one ends of the two trip rods (401) far away from the energy storage piece (4) are arc-shaped.
5. A trip mechanism for a circuit breaker as claimed in claim 3, wherein: the bimetallic strip (5) and the fixing plate (6) are fixedly connected by welding or riveting or a combination of the two.
6. The trip mechanism of a circuit breaker of claim 1, wherein: adjusting screw (7) threaded connection is on the inside flash barrier of circuit breaker, adjusting screw (7) are close to the one end of bimetallic strip (5) and are arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021622408.XU CN212783339U (en) | 2020-08-06 | 2020-08-06 | Tripping mechanism of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021622408.XU CN212783339U (en) | 2020-08-06 | 2020-08-06 | Tripping mechanism of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212783339U true CN212783339U (en) | 2021-03-23 |
Family
ID=75050611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021622408.XU Active CN212783339U (en) | 2020-08-06 | 2020-08-06 | Tripping mechanism of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212783339U (en) |
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2020
- 2020-08-06 CN CN202021622408.XU patent/CN212783339U/en active Active
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