CN107958828B - Circuit breaker - Google Patents
Circuit breaker Download PDFInfo
- Publication number
- CN107958828B CN107958828B CN201610901619.9A CN201610901619A CN107958828B CN 107958828 B CN107958828 B CN 107958828B CN 201610901619 A CN201610901619 A CN 201610901619A CN 107958828 B CN107958828 B CN 107958828B
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- China
- Prior art keywords
- contact
- moving contact
- adjusting mechanism
- distance adjusting
- circuit breaker
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- 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
- H01H73/04—Contacts
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- Breakers (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A circuit breaker comprises an operating mechanism, a moving contact, a fixed contact and an opening distance adjusting mechanism, wherein the operating mechanism drives the moving contact to move and close the fixed contact, the operating mechanism drives the moving contact to be far away from the fixed contact during breaking and enables the opening distance adjusting mechanism to store energy, the maximum opening distance between the moving contact and the fixed contact during breaking is a first opening distance D1, then the opening distance adjusting mechanism releases energy to drive the movable contact to move to an open position, a second opening distance D2 is formed between the movable contact and the fixed contact, the first opening distance D1 is larger than the second opening distance D2, under the condition of not increasing the volume of the circuit breaker, the distance of the moving contact far away from the static contact when the moving contact is broken is increased, so that the electric arc is stretched and broken when the moving contact is broken, the contact can be prevented from being ablated when the electric arc stays between the contacts, after the breaking, the moving contact can be pushed back to the static contact, so that the miniaturization of the circuit breaker structure is facilitated.
Description
Technical Field
The invention relates to the field of low-voltage electrical appliances, in particular to a circuit breaker.
Background
The circuit breaker is an important electrical apparatus for control circuit, and present circuit breaker mostly tends to miniaturize, but the structure of miniaturized circuit breaker can lead to the electric arc that produces when the contact divides to be difficult to be elongated, the stretch-break because of the separation distance between moving contact and the static contact reduces, if electric arc stays for a long time between moving contact and the static contact, can cause the contact ablation damage.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a circuit breaker with simple structure and high reliability.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a circuit breaker, including operating device 1, moving contact 3 and static contact 4, operating device 1 drives moving contact 3 motion and static contact 4 closure, still include apart from adjustment mechanism 2, operating device 1 drives moving contact 3 and keeps away from static contact 4 and make apart from adjustment mechanism 2 energy storage during the disconnection, the biggest apart from being first apart from D1 between moving contact 3 and the static contact 4 during the disconnection, then open apart from adjustment mechanism 2 release can drive moving contact 3 motion to the disconnection position, have second apart from D2 this moment between moving contact 3 and static contact 4, first apart from D1 is greater than second apart from D2.
Optionally, the opening distance adjusting mechanism 2 is arranged on a motion track of the operating mechanism 1 during breaking.
Optionally, the movable contact 3 is disposed on a contact support 14 of the operating mechanism 1, and a buffer arm 16 engaged with the spacing adjustment mechanism 2 is disposed on the contact support 14.
Optionally, the buffer arm 16 extends obliquely from the contact support 14 to between the distance adjusting mechanism 2 and the movable contact 3.
Optionally, the moving contact 3 is directly matched with the spacing adjusting mechanism 2, and the spacing adjusting mechanism 2 is arranged on a motion track of the moving contact 3 during breaking.
Optionally, when the moving contact 3 moves to the open position, the operating mechanism 1 contacts the open-distance adjusting mechanism 2, and when the moving contact 3 and the static contact 4 are closed, the operating mechanism 1 is separated from the open-distance adjusting mechanism 2.
Optionally, the opening adjustment mechanism 2 comprises a spring 21.
Optionally, the opening distance adjusting mechanism 2 includes a spring block 22 provided with a spring groove 23, the spring 21 is disposed in the spring groove 23, one end of the spring 21 is connected to the spring groove 23, the other end of the spring 21 is provided with a spring plate 24 engaged with the movable contact 3, and a width of the spring plate 24 is greater than a width of the spring groove 23.
Optionally, the open-distance adjusting mechanism 2 includes a tension spring, one end of the tension spring is connected with the operating mechanism, and the other end of the tension spring is fixed on the casing.
Optionally, the operating mechanism 1 includes a connecting rod 12 connected to the handle 11, a contact support 14 connected to the moving contact 3, and a rocker arm 15 connected between the connecting rod 12 and the contact support 14, the stationary contact 4 is disposed on one side of the moving contact 3, the open-distance adjusting mechanism 2 is disposed on the other side of the moving contact 3, an arc striking chamber 61 is disposed below the moving contact 3, an arc extinguishing chamber 62 is disposed on one side of the arc striking chamber 61, and the open-distance adjusting mechanism 2 is disposed between the arc extinguishing chamber 62 and the operating mechanism 1.
The circuit breaker can be used for prolonging and breaking the electric arc when the moving contact is broken by increasing the distance of the moving contact far away from the static contact when the moving contact is broken by the open distance adjusting mechanism without increasing the volume of the circuit breaker, so that the electric arc can be prevented from staying between the contacts to ablate the contacts, the moving contact can be pushed back to the static contact after the electric arc is broken, and the miniaturization of the circuit breaker structure is facilitated.
Drawings
Figure 1 is a schematic diagram of the closed position of the circuit breaker of the present invention;
fig. 2 is a schematic structural diagram of the breaker of the invention when in breaking;
fig. 3 is a schematic structural view of the open position of the circuit breaker of the present invention;
fig. 4 is a schematic structural view of the circuit breaker opening distance adjusting mechanism of the present invention;
fig. 5 is a partial structural schematic view of fig. 1.
Detailed Description
The following describes the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 5. The circuit breaker of the present invention is not limited to the description of the following embodiments.
As shown in fig. 1-3, the circuit breaker of the present invention includes an operating mechanism 1, a moving contact 3, a fixed contact 4, and an opening distance adjusting mechanism 2, wherein the operating mechanism 1 drives the moving contact 3 to move and close the fixed contact 4, and the operating mechanism 1 drives the moving contact 3 to move away from the fixed contact 4 during breaking and stores energy in the opening distance adjusting mechanism 2, a maximum opening distance between the moving contact 3 and the fixed contact 4 during breaking is a first opening distance D1 (fig. 2), and then the opening distance adjusting mechanism 2 releases energy to drive the moving contact 3 to move to an open position, and at this time, a second opening distance D2 is provided between the moving contact 3 and the fixed contact 4, and the first opening distance D1 is greater than the second opening distance D2 (fig.. When the breaker is disconnected, the movable contact 3 crosses the disconnection position under the action of the return impact force, the opening distance between the movable contact 3 and the static contact 4 is larger than the second opening distance D2, the maximum distance between the movable contact and the static contact when the breaker is disconnected can be increased under the condition that the volume of the breaker is reduced, electric arcs are lengthened and broken when the movable contact is disconnected, the situation that the electric arcs stop between the contacts to ablate the contacts is avoided, the opening distance adjusting mechanism 2 in disconnection can absorb the return impact force generated when the movable contact 3 is disconnected and provide a space required when the movable contact 3 is disconnected, and the opening distance adjusting mechanism 2 can enable the movable contact 3 to push the movable contact 3 to the static contact 4 after the electric arcs are disconnected, so that the whole structure of the breaker is convenient.
Referring to fig. 4, in the breaking process, the movable contact 3 moves away from the fixed contact 4 by a distance and then acts on the distance adjusting mechanism 2, and continues to move through the third distance D3 under the action of the distance adjusting mechanism 2 to reach the position at the first distance D1 from the fixed contact 4. Preferably, as shown in fig. 1 to 3, the opening distance adjusting mechanism 2 is disposed on a motion track of the operating mechanism 1 during breaking, the movable contact 3 moves through a second opening distance D2 and then acts on the opening distance adjusting mechanism 2 during breaking, and after reaching a first opening distance D1 from the stationary contact 4 after passing through a third opening distance D3, the movable contact resets to a second opening distance D2 from the stationary contact under the action of the opening distance adjusting mechanism 2. The embodiment realizes the increase of the opening distance of the moving contact of the miniature circuit breaker by supporting two sections of opening distances matched with the opening distance adjusting mechanism 2 through the contact. Of course, the opening adjustment mechanism 2 may be disposed at other positions, such as a solution using a tension spring.
The opening distance adjusting mechanism 2 in this embodiment includes a spring 21, when the moving contact 3 is disconnected, the spring 21 can absorb the impact force of the moving contact 3 and convert the impact force into elastic potential energy of itself, the moving contact 3 continues to be away from the moving contact 4 under the action of the spring 21 to a position which is a first opening distance D2 away from the moving contact 4, at this time, the moving contact 3 reaches a maximum disconnection position, the spring 21 starts to push the moving contact 3 back to the static contact 4, when the moving contact 3 moves to the disconnection position, the operating mechanism 1 contacts with the opening distance adjusting mechanism 2 and slightly compresses the spring 21 to keep balance, and when the moving contact 3 and the static contact 4 are closed, the operating mechanism 1 is separated from the. The spring 21 in this embodiment is a compression spring, and is disposed on a motion track of the moving contact 3 during breaking, and the moving contact 3 may impact and compress the spring 21 during breaking.
Specifically, the opening distance adjusting mechanism 2 of the present embodiment includes a spring block 22 provided with a spring groove 23, the spring 21 is disposed in the spring groove 23, one end of the spring 21 is connected to the spring groove 23, the other end of the spring is provided with a spring plate 24 engaged with the movable contact 3, the width of the spring plate 24 is greater than the width of the spring groove 23, and the spring block 22 can limit the movement distance of the spring plate 24. As another embodiment of the present invention, the spring 21 may also be a tension spring structure and disposed on the other side of the movable contact 3, one end of the tension spring is connected to the operating mechanism, and the other end is fixed on the housing, but of course, other elastic elements may also be used instead of the spring 21.
As shown in fig. 5, the movable contact 3 in this embodiment is disposed on a contact support 14 of the operating mechanism 1, a buffer arm 16 that cooperates with a spring 21 of the spacing adjustment mechanism 2 is disposed on the contact support 14, the movable contact 3 extends obliquely to one side of the fixed contact 4 to cooperate with the fixed contact 4, the buffer arm 16 extends obliquely to one side of the spacing adjustment mechanism 2 to cooperate with the spacing adjustment mechanism 2, the buffer arm 16 extends obliquely from the contact support 14 to a position between the spacing adjustment mechanism 2 and the movable contact 3, and after the movable contact 3 and the fixed contact 4 are closed, the buffer arm 16 does not contact with the spacing adjustment mechanism 2; when the moving contact 3 and the static contact 4 are disconnected, the buffer arm 16 contacts the open distance adjusting mechanism 2 after the moving contact 3 moves for a certain distance, the spring 21 of the distance adjusting mechanism 2 is compressed under the impact action of the movable contact 3, and meanwhile, an avoidance space required by the movement is provided for the movable contact 3, when the movable contact 3 moves past the third opening D3 to the position at the first opening D1 from the stationary contact 4, the moving contact 3 breaks the arc generated between the moving contact and the static contact 4, and simultaneously the spring 21 of the open-distance adjusting mechanism 2 reaches the maximum compression amount, namely the limit distance when the moving contact 3 is disconnected, then the moving contact 3 is driven to approach the static contact 4 for a certain distance in the return process of the spring 21 of the distance adjusting mechanism 2, meanwhile, the operating mechanism 1 is driven to reset correctly, and after resetting, the buffer arm 16 is in contact with the open distance adjusting mechanism 2 and slightly compresses the open distance adjusting mechanism 2. The movable contact 3 is stretched to a sufficient distance by the first opening distance D1 when being disconnected, and the operating mechanism 1 is reset after being disconnected, and the movable contact 3 is pushed back to the position of the second opening distance D2 matched with the fixed contact 4. Of course, the moving contact 3 can also directly act on the open distance adjusting mechanism 2, and the open distance adjusting mechanism 2 is arranged on the motion track of the moving contact 3 when the moving contact is disconnected; or by other elements on the operating mechanism in cooperation with the opening adjustment mechanism 2.
As shown in fig. 2, the operating mechanism 1 of the present embodiment includes a connecting rod 12 connected to a handle 11, a contact support 14 connected to the movable contact 3, and a rocker arm 15 connected between the connecting rod 12 and the contact support 14, a trip catch 13 matched with a tripping mechanism of the circuit breaker is disposed on the rocker arm 15, one end of the contact support 14 is pivotally mounted on the rocker arm 15, the stationary contact 4 is disposed on the right side of the movable contact 3, an arc striking chamber 61 is disposed below the movable contact 3, an arc extinguishing chamber 62 is disposed on the left side of the arc striking chamber 61, the separation distance adjusting mechanism 2 is disposed on the left side of the movable contact 3, between the arc extinguishing chamber 62 and the operating mechanism 1, and the trip catch 13 is in snap-fit with a latch. The contact support 14 is provided with a buffer arm 16 engaged with the opening adjustment mechanism 2, and the opening adjustment mechanism 2 is provided on a swing locus of the buffer arm 16. Obviously, the operating mechanism of the present invention may adopt other link structures, such as a structure without a rocker, a structure in which a latch and a jumper are directly mounted on a contact support, and the like, which belong to the protection scope of the present invention. In addition, in this embodiment, the moving contact swings from the middle of the circuit breaker to the fixed contact located at one side to be closed, and obviously, the moving contact may also swing from the side of the circuit breaker to the fixed contact located at the middle of the circuit breaker to be closed.
The circuit breaker can also comprise a tripping mechanism, such as an instantaneous tripping mechanism and a time delay tripping mechanism, when the circuit breaker is overloaded, a bimetallic strip of the time delay tripping mechanism acts on a lock catch of the operating mechanism in a bending way to unlock the lock catch and the trip catch, and the circuit breaker is triggered to trip to realize protection; when electric leakage occurs, the moving rod of the electromagnetic mechanism of the instantaneous tripping mechanism acts on the lock catch of the operating mechanism to trigger the circuit breaker to trip so as to realize protection.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (9)
1. The utility model provides a circuit breaker, includes operating device (1), moving contact (3) and static contact (4), and operating device (1) drives moving contact (3) motion and static contact (4) closure, its characterized in that: the device is characterized by further comprising an opening distance adjusting mechanism (2), the operating mechanism (1) drives the moving contact (3) to be far away from the static contact (4) during breaking and enables the opening distance adjusting mechanism (2) to store energy, the maximum opening distance between the moving contact (3) and the static contact (4) during breaking is a first opening distance D1, then the opening distance adjusting mechanism (2) releases energy to drive the moving contact (3) to move to a breaking position, a second opening distance D2 is arranged between the moving contact (3) and the static contact (4), and the first opening distance D1 is larger than the second opening distance D2; when the moving contact (3) moves to the disconnection position, the operating mechanism (1) is in contact with the open distance adjusting mechanism (2), and when the moving contact (3) and the static contact (4) are closed, the operating mechanism (1) is separated from the open distance adjusting mechanism (2).
2. The circuit breaker of claim 1, wherein: the open distance adjusting mechanism (2) is arranged on the motion track of the operating mechanism (1) during breaking.
3. The circuit breaker of claim 1, wherein: the moving contact (3) is arranged on a contact support (14) of the operating mechanism (1), and a buffer arm (16) matched with the spacing adjusting mechanism (2) is arranged on the contact support (14).
4. The circuit breaker of claim 3, wherein: the buffer arm (16) obliquely extends from the contact support (14) to a position between the distance adjusting mechanism (2) and the movable contact (3).
5. The circuit breaker of claim 1, wherein: the moving contact (3) is directly matched with the opening distance adjusting mechanism (2), and the opening distance adjusting mechanism (2) is arranged on a motion track of the moving contact (3) during breaking.
6. The circuit breaker of claim 1, wherein: the open distance adjusting mechanism (2) comprises a spring (21).
7. The circuit breaker of claim 6, wherein: the opening distance adjusting mechanism (2) comprises a spring block (22) provided with a spring groove (23), the spring (21) is arranged in the spring groove (23), one end of the spring (21) is connected with the spring groove (23), the other end of the spring is provided with a spring plate (24) matched with the moving contact (3), and the width of the spring plate (24) is larger than that of the spring groove (23).
8. The circuit breaker of claim 1, wherein: the open distance adjusting mechanism (2) comprises a tension spring, one end of the tension spring is connected with the operating mechanism, and the other end of the tension spring is fixed on the shell.
9. The circuit breaker of claim 1, wherein: the operating mechanism (1) comprises a connecting rod (12) connected with a handle (11), a contact support (14) connected with the moving contact (3) and a rocker arm (15) connected between the connecting rod (12) and the contact support (14), the static contact (4) is arranged on one side of the moving contact (3), the open distance adjusting mechanism (2) is arranged on the other side of the moving contact (3), an arc striking chamber (61) is arranged below the moving contact (3), an arc extinguishing chamber (62) is arranged on one side of the arc striking chamber (61), and the open distance adjusting mechanism (2) is arranged between the arc extinguishing chamber (62) and the operating mechanism (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610901619.9A CN107958828B (en) | 2016-10-17 | 2016-10-17 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610901619.9A CN107958828B (en) | 2016-10-17 | 2016-10-17 | Circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107958828A CN107958828A (en) | 2018-04-24 |
| CN107958828B true CN107958828B (en) | 2020-03-31 |
Family
ID=61953433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610901619.9A Active CN107958828B (en) | 2016-10-17 | 2016-10-17 | Circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107958828B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113433350B (en) * | 2020-03-23 | 2024-03-08 | 西安高压电器研究院股份有限公司 | Explosion chamber opening adjustment frock |
| CN112908796A (en) * | 2021-01-20 | 2021-06-04 | 云南电网有限责任公司电力科学研究院 | High-voltage test circuit breaker with adjustable contact movement distance |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0338930A1 (en) * | 1988-04-22 | 1989-10-25 | Hager Electro S.A. | Circuit breakers or differential circuit breakers |
| CN103413735A (en) * | 2013-08-21 | 2013-11-27 | 科都电气有限公司 | Breaker |
| FR2928774B1 (en) * | 2008-03-12 | 2013-12-27 | Hager Electro Sas | ELASTIC ROD LOCK MECHANISM. |
| CN203553073U (en) * | 2013-06-25 | 2014-04-16 | 施耐德电器工业公司 | Miniature circuit breaker |
| CN205789811U (en) * | 2016-06-01 | 2016-12-07 | 温州创伟永吉电气有限公司 | Rccb |
| CN206225307U (en) * | 2016-10-17 | 2017-06-06 | 浙江正泰电器股份有限公司 | Breaker |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1184864B (en) * | 1985-01-29 | 1987-10-28 | Cge Comp Gen Elettromecc | PROVISION TO AVOID AND / OR DELAY THE CLOSING OF CONTACTS IN CURRENT LIMIT SWITCHES AFTER OPENING THE SAME FOR REPULSION |
| CN102082048A (en) * | 2009-11-26 | 2011-06-01 | 无锡唯特电气技术有限公司 | Miniature circuit breaker with high breaking capacity |
| US8836453B2 (en) * | 2011-10-07 | 2014-09-16 | Siemens Industry, Inc. | Electronic circuit breaker, electronic circuit breaker subassembly, circuit breaker secondary electrical contact assembly, and powering methods |
-
2016
- 2016-10-17 CN CN201610901619.9A patent/CN107958828B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0338930A1 (en) * | 1988-04-22 | 1989-10-25 | Hager Electro S.A. | Circuit breakers or differential circuit breakers |
| FR2928774B1 (en) * | 2008-03-12 | 2013-12-27 | Hager Electro Sas | ELASTIC ROD LOCK MECHANISM. |
| CN203553073U (en) * | 2013-06-25 | 2014-04-16 | 施耐德电器工业公司 | Miniature circuit breaker |
| CN103413735A (en) * | 2013-08-21 | 2013-11-27 | 科都电气有限公司 | Breaker |
| CN205789811U (en) * | 2016-06-01 | 2016-12-07 | 温州创伟永吉电气有限公司 | Rccb |
| CN206225307U (en) * | 2016-10-17 | 2017-06-06 | 浙江正泰电器股份有限公司 | Breaker |
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| Publication number | Publication date |
|---|---|
| CN107958828A (en) | 2018-04-24 |
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