CN109390189B - Tripping device - Google Patents
Tripping device Download PDFInfo
- Publication number
- CN109390189B CN109390189B CN201710655091.6A CN201710655091A CN109390189B CN 109390189 B CN109390189 B CN 109390189B CN 201710655091 A CN201710655091 A CN 201710655091A CN 109390189 B CN109390189 B CN 109390189B
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- Prior art keywords
- trip unit
- bracket
- deflector rod
- combined
- lock catch
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- 210000000078 claw Anatomy 0.000 claims abstract description 15
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 description 10
- 238000010168 coupling process Methods 0.000 description 10
- 238000005859 coupling reaction Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
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
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
Landscapes
- Breakers (AREA)
Abstract
The invention provides a tripping device for a circuit breaker. The trip device includes: a base; the trip unit, set up in on the base, the trip unit includes: the bracket is arranged on the base; the deflector rod is provided with a deflector rod first end part, a deflector rod second end part and a deflector rod combination end part and is combined with the base in a rotatable mode; the lock catch is provided with a clamping buckle and a claw part, and the lock catch is combined on the bracket in a rotatable mode; the jump buckle is provided with a card and a groove which are clamped with the clamping buckle; an elastic member, one end of which is combined with a first combining end of the bracket arranged on the side surface part of the bracket, and the other end of which is combined with one end of the jump buckle; when the first end of the driving lever receives external force, the second end of the driving lever pushes the claw part of the lock catch so as to rotate the lock catch and separate the clamping buckle from the clamp and the groove. The tripping device can realize the tripping of the circuit breaker mechanism by using smaller force.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a tripping device for a circuit breaker.
Background
Typically, a trip device is a device that is mechanically coupled to the circuit breaker for releasing the retention mechanism and causing the circuit breaker to automatically open. Generally, a conventional bimetallic strip mechanical or electronic electromagnetic release is integrated with a release mechanical part, and at present, a smart release does not include a mechanical release part. The release is a leakage protector, which is used for generating voltage on two sides of the secondary coil of the mutual inductor when the vector sum of the current passing through the zero sequence current mutual inductor is not equal to zero when the circuit has leakage or human body electric shock, and the voltage is amplified by the integrated circuit, and when the set value is reached, the power supply is cut off in 0.1 second by the leakage release, thereby playing the role of electric shock and leakage protection.
In the application of the special release for the thermal-magnetic tripping of the large-current frame molded case circuit breaker, the force value generated when the bimetal is heated and bent and the magnetic force generated instantaneously are small, so that the release of the molded case circuit breaker mechanism is not enough to be directly driven, and therefore, in the prior art, the tripping function is realized by adopting the tripping device with the electromagnetic tripping coil.
Referring to fig. 1 and 2, fig. 1 and 2 are prior art release devices. It includes: a base 110; a bracket 120 disposed on the base 110; an electromagnetic trip coil 130 disposed on the base 110; a shift lever 140 disposed on one side of the base 110 through a shaft, the bracket further including: a latch 121 disposed on the bracket 120 through a shaft; a jump buckle 122 having one end coupled to one end of the bracket 120 through a shaft and the other end inserted into the groove 123 of the bracket 120; and a tension spring 124 having one end coupled to one end of the bracket 120 and the other end coupled to one end of the jump ring 122. The electromagnetic trip coil 130 includes a main body 131, a permanent magnet 132, and a spring 133, and when the product is closed, the coil core is attracted by the permanent magnet 132. When the trip device is in a locked state, the lock catch 121 and the trip catch 122 are engaged with each other. When the main circuit is overloaded, an alternating current signal is provided to the electromagnetic coil after the processing of the main circuit transformer and the electronic intelligent release (OCR), the electromagnetic force generated by the electromagnetic coil counteracts the magnetic force of the permanent magnet, the coil iron core pushes the lock catch 121 to act under the counterforce of the spring 133, and the lock catch 121 and the jump buckle 122 are unlocked, so that the product is released.
However, in the prior art, there are the following problems: the original release is special for an electronic molded case circuit breaker, and the release action of the release is realized by the action of an electromagnetic coil, so that the number of components is large, the structure is complex, the cost is high, and the release can not be applied to a thermomagnetic circuit breaker.
Disclosure of Invention
The invention aims to provide a tripping device which realizes tripping of a circuit breaker mechanism by using small force.
The present invention provides a trip device for a circuit breaker, comprising: a base; a trip unit disposed on the base,
the trip unit includes:
the bracket is arranged on the base;
the deflector rod is provided with a deflector rod first end part, a deflector rod second end part and a deflector rod combination end part and is combined with the base in a rotatable mode;
the lock catch is provided with a clamping buckle and a claw part, and the lock catch is combined on the bracket in a rotatable mode;
the jump buckle is provided with a clamping groove clamped with the clamping buckle;
an elastic member, one end of which is combined with a first combining end of the bracket arranged on the side surface part of the bracket, and the other end of which is combined with one end of the jump buckle;
when the first end of the driving lever receives external force, the second end of the driving lever pushes the claw part of the lock catch so as to rotate the lock catch and separate the clamping buckle from the clamping groove.
Preferably, a distance between a portion of the first end of the shift lever receiving the external force and the coupling end of the shift lever is greater than a distance between the second end of the shift lever and the coupling end of the shift lever.
Preferably, the claw portion includes: a first bending portion that is bent at a main body of the claw portion; a connection part having one end extended from the first bending part; a second bent portion bent from the other end of the connection portion; and the contact part is in contact with the second end part of the shifting lever.
Preferably, the first bent portion has a height higher than a height of the contact portion in a vertical direction.
Preferably, the shift lever rotates about a first axis,
the trip unit further includes: and one end of the second torsion spring is combined on the base, the other end of the second torsion spring is combined on the shifting lever, and the second torsion spring wraps the first shaft.
Preferably, the lock rotates about a second axis,
the trip unit further includes: one end of the first torsion spring is fixed on the third shaft, the other end of the first torsion spring is fixed on the lock catch, and the second shaft is wrapped by the first torsion spring.
Preferably, the stent comprises: a first guide groove formed in an upper surface of the bracket; a second guide groove formed in a lower surface of the bracket; and the groove part penetrates through the side surface part of the bracket and comprises a first protrusion and a second protrusion opposite to the first protrusion.
Preferably, the jump buckle includes: a first guide protrusion inserted into the first guide groove; the second guide projection is inserted into the second guide groove; and an insertion end inserted into the groove portion.
Preferably, the external force includes a force generated by deformation of the bimetal after being heated.
Preferably, the trip unit further includes a protective cover, one end of which is coupled to the bracket and surrounds the trip unit.
According to the present invention, it is possible to provide a trip device for a circuit breaker, which converts a small force from a bimetal into a large force driving the trip device to trip, using a lever principle.
Drawings
Fig. 1 is a diagram showing the front of a trip unit of a prior art design.
Fig. 2 is a diagram showing the back of a trip unit of prior art design.
Fig. 3 is a diagram showing a front side of a trip device according to an embodiment of the present invention.
Fig. 4 is a diagram illustrating a back side of a trip device of an embodiment of the present invention.
Fig. 5 is a diagram illustrating a latch according to an embodiment of the present invention.
Fig. 6 is a diagram showing a shift lever according to an embodiment of the present invention.
Fig. 7 is a view illustrating a coupling state of the first torsion spring according to an embodiment of the present invention.
Fig. 8 is a diagram illustrating a state in which a bimetal or a momentary action module generating an external force acts on a first end of a lever according to an embodiment of the present invention.
Detailed Description
Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.
When reference numerals are given to components in the respective drawings, the same components are given the same reference numerals as much as possible in different drawings. In describing the embodiments of the present invention, if it is determined that specific descriptions of related known structures or functions will interfere with the understanding of the embodiments of the present invention, the detailed descriptions thereof will be omitted.
Referring to fig. 3 to 6, the trip device for a circuit breaker of the present invention includes: a base 1; a trip unit 2; which is arranged on the base 1.
The trip unit 2 includes: a bracket 21 having an upper surface portion 211, a lower surface portion 212, and a side surface portion 213, and provided on the base 1; a lever 22 having a lever first end 221, a lever second end 222, and a lever coupling end 223, wherein the lever coupling end 223 is rotatably coupled to the base 1 via a first shaft 31; a lock catch 23 provided with a snap catch 232 and a claw portion 250, the lock catch 23 being rotatably coupled to the upper surface portion 211 and the lower surface portion 212 of the holder 21 via a second shaft 32; a jumper 24 provided with an engaging groove 241 for engaging with the engaging hook 232 of the buckle 23; an elastic member 25 having one end coupled to a first coupling end 219 of the bracket provided at the side surface 213 of the bracket 21 and the other end coupled to one end of the jump buckle 24; a push rod 26 mounted on one surface of the jump buckle 24. In the present invention, the elastic member 25 may be a tension spring, a rubber band, or the like.
The trip unit 2 further includes: a first torsion spring 233 (see fig. 2 and 7) having one end fixed to the third shaft 33 and the other end fixed to the locker 23; one end of the second torsion spring 224 is coupled to the base 1, and the other end is coupled to the shift lever 22. The third shaft 33 is provided to penetrate the upper and lower surfaces of the holder 21. The first torsion spring 233 wraps the second shaft 32, so that the latch 23 returns to the original position when the lever second end 222 stops pressing the latch 23 after the lever second end 222 pushes the latch 23 to rotate. The second torsion spring 224 wraps the first shaft 31, so that the shift lever 22 is restored to the original position when the external force stops applying pressure to the first end 221 of the shift lever after the first end 221 of the shift lever receives the external force to rotate the shift lever 22.
The bracket 21 includes: a first guide groove 214 formed in a groove in the upper surface 211; a second guide groove 215 formed in a groove in the lower surface portion 212; and a groove 216 penetrating the side surface 213. The groove portion 216 includes a first protrusion 217 and a second protrusion 218 opposite to the first protrusion 217.
The jump buckle 24 includes: a first guide protrusion 242 inserted into the first guide groove 214; the second guide protrusion 243 inserted into the second guide groove 215; the insertion end 244 is inserted into the groove 216. The first and second protrusions 217 and 218 wrap the insertion end 244, thereby guiding the insertion end 244 to move in a direction substantially perpendicular to the side portions 213 when the insertion end 244 is inserted into the groove portion 216.
When the first end 221 of the lever receives an external force, the lever 22 rotates around the first shaft 31, so that the second end 222 of the lever approaches the latch 23, the second end 222 of the lever pushes the claw portion 250 of the latch 23, so that the latch 23 rotates around the second shaft 32, and the engaging catch 232 of the latch 23 is disengaged from the engaging groove 241 of the skip catch 24. At this time, the jumper 24 is moved in a direction away from the breaker 23 by the tension of the tension spring 25 and the guide of the first guide groove 214, the second guide groove 215, and the groove 216, and thus the push rod 26 attached to one surface of the jumper 24 pushes the breaker to release the breaker.
The external force may include, but is not limited to, a force applied to the toggle lever first end 221 by the bimetal strip 50 or the momentary action module. Generally, the bimetal deforms when heated, and the force generated by the deformation is small, so that the lock catch of the trip device is difficult to push. However, when the lever principle is used, when the force generated by the bimetal is applied to the lever first end 221 of the lever 22, the lever 22 rotates with respect to the lever coupling end 223, and the lever second end 222 pushes the pawl portion 250, so that the striker 23 rotates with respect to the second shaft 32, and the engaging catch 232 is disengaged from the engaging groove 241. Fig. 8 shows a state in which the bimetal acts on the shift lever 22.
Because the invention makes use of the principle of leverage, i.e. the transformation of a small force into a large force. The distance between the external force receiving portion of the lever first end 221 and the lever coupling end 223 is greater than the distance between the lever second end 222 contacting the claw portion 250 and the lever coupling end 223. In other words, referring to fig. 3 and 6, when a point closest to the lever coupling end 223 on a straight line formed by the lever first end 221 and the lever second end 222 is referred to as a first point, a distance between the first point and a portion of the lever first end 221 that receives an external force is greater than a distance between the first point and the lever second end 222. That is, when the lever 22 receives an external force, the closer the pawl portion 250 is to the first point, the greater the pressure applied by the lever second end portion 222 to the pawl portion 250.
Referring to fig. 5, the claw portion 250 includes: a first bent portion 251 bent at a body of the claw portion 250; a connection portion 252 having one end extending from the first bent portion 251; a second bending portion 253 bent from the other end of the connection portion 252; a contact 254 in contact with the toggle lever second end 222. In the vertical direction, the height of the first bent portion 251 is higher than the height of the contact portion 254.
Referring to fig. 4, the trip unit 2 further includes a protective cover 4 having one end coupled to the bracket 21 and surrounding the trip unit 2.
The preferred embodiments of the present invention described above are intended only to solve the technical problems, and it is obvious to those skilled in the art that various modifications, changes, additions and the like can be made within the spirit and scope of the present invention, and these modifications and the like fall within the scope of the claims.
The invention realizes the tripping device with less components, simple structure and low manufacturing cost.
Therefore, it is apparent that various modifications and imitations made by those skilled in the art without departing from the technical spirit of the present invention fall within the protection scope of the present invention.
Claims (9)
1. A trip unit for a circuit breaker, comprising: a base; a trip unit arranged on the base and characterized in that,
the trip unit includes:
the bracket is arranged on the base;
the deflector rod is provided with a deflector rod first end part, a deflector rod second end part and a deflector rod combination end part and is combined with the base in a rotatable mode;
the lock catch is provided with a clamping buckle and a claw part, and the lock catch is combined on the bracket in a rotatable mode;
the jump buckle is provided with a clamping groove clamped with the clamping buckle;
an elastic member, one end of which is combined with a first combining end of the bracket arranged on the side surface part of the bracket, and the other end of which is combined with one end of the jump buckle;
when the first end of the deflector rod receives external force, the second end of the deflector rod pushes the claw part of the lock catch to enable the lock catch to rotate and enable the clamping buckle to be separated from the clamping groove,
the distance between the part of the first end of the deflector rod receiving the external force and the combining end of the deflector rod is larger than the distance between the second end of the deflector rod and the combining end of the deflector rod.
2. The trip unit of claim 1,
the claw portion includes: a first bending portion that is bent at a main body of the claw portion; a connection part having one end extended from the first bending part; a second bent portion bent from the other end of the connection portion; and the contact part is in contact with the second end part of the shifting lever.
3. The trip unit of claim 2,
the height of the first bent portion is higher than the height of the contact portion in the vertical direction.
4. The trip unit of claim 1,
the shift lever rotates around the first shaft as a center,
the trip unit further includes: and one end of the second torsion spring is combined on the base, the other end of the second torsion spring is combined on the shifting lever, and the second torsion spring wraps the first shaft.
5. The trip unit of claim 1,
the lock catch rotates by taking the second shaft as a center,
the trip unit further includes: one end of the first torsion spring is fixed on the third shaft, the other end of the first torsion spring is fixed on the lock catch, and the second shaft is wrapped by the first torsion spring.
6. The trip unit of claim 1,
the bracket includes: a first guide groove formed in an upper surface of the bracket; a second guide groove formed in a lower surface of the bracket; a groove part penetrating the side surface part of the bracket,
the groove portion includes a first protrusion and a second protrusion facing the first protrusion.
7. The trip unit of claim 6,
the jump buckle includes: a first guide protrusion inserted into the first guide groove; the second guide projection is inserted into the second guide groove; and an insertion end inserted into the groove portion.
8. The trip unit of claim 1,
the external force includes a force generated by deformation of the bimetal after being heated.
9. Trip unit according to any of the claims 1 to 8,
the tripping unit further comprises a protective cover, and one end of the protective cover is combined with the support and surrounds the tripping unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710655091.6A CN109390189B (en) | 2017-08-03 | 2017-08-03 | Tripping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710655091.6A CN109390189B (en) | 2017-08-03 | 2017-08-03 | Tripping device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109390189A CN109390189A (en) | 2019-02-26 |
| CN109390189B true CN109390189B (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710655091.6A Active CN109390189B (en) | 2017-08-03 | 2017-08-03 | Tripping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109390189B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202888100U (en) * | 2012-11-14 | 2013-04-17 | 三信国际电器上海有限公司 | Operating mechanism of residual current circuit breaker |
| CN205789801U (en) * | 2016-06-01 | 2016-12-07 | 浙江正泰电器股份有限公司 | The releasing structure of chopper |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4714092B2 (en) * | 2006-06-22 | 2011-06-29 | パナソニック電工電路株式会社 | Circuit breaker |
-
2017
- 2017-08-03 CN CN201710655091.6A patent/CN109390189B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202888100U (en) * | 2012-11-14 | 2013-04-17 | 三信国际电器上海有限公司 | Operating mechanism of residual current circuit breaker |
| CN205789801U (en) * | 2016-06-01 | 2016-12-07 | 浙江正泰电器股份有限公司 | The releasing structure of chopper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109390189A (en) | 2019-02-26 |
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Address after: 214028 Jiangsu city in Wuxi Province, Wuxi national hi tech Industrial Development Zone Le Xing Lu Industrial Park LS Applicant after: Lexing electric (Wuxi) Co., Ltd Address before: 214028 Jiangsu city in Wuxi Province, Wuxi national hi tech Industrial Development Zone Le Xing Lu Industrial Park LS Applicant before: LS INDUSTRIAL SYSTEMS Co.,Ltd. |
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