CN2640027Y - Current-limiting device wiht repulsion mechanism - Google Patents
Current-limiting device wiht repulsion mechanism Download PDFInfo
- Publication number
- CN2640027Y CN2640027Y CNU032096771U CN03209677U CN2640027Y CN 2640027 Y CN2640027 Y CN 2640027Y CN U032096771 U CNU032096771 U CN U032096771U CN 03209677 U CN03209677 U CN 03209677U CN 2640027 Y CN2640027 Y CN 2640027Y
- Authority
- CN
- China
- Prior art keywords
- moving contact
- repulsion
- contact
- current
- spare
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
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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
- H01H73/045—Bridging contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2041—Rotating bridge
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2041—Rotating bridge
- H01H1/205—Details concerning the elastic mounting of the rotating bridge in the rotor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2041—Rotating bridge
- H01H1/2058—Rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker
Landscapes
- Breakers (AREA)
Abstract
The utility model relates to a current limiting device with two repulsion drivers for circuit breakers, comprising a bracket. A left moving contact and a right moving contact, which overlap each other at base part of the left moving contact and the right moving contact, are arranged on a central shaft of the bracket; two repulsion drivers, which are arranged on the bracket by a plurality of axle pins, are arranged symmetrically on the two moving contacts; a return spring is arranged at one end of each repulsion driver, and two pressure springs, which are sleeved on the central shaft of the bracket, are arranged at two sides of the area where the two moving contacts overlap with each other; the two pressure springs act on the overlapping contact surface at the base part of the moving contacts to provide contact pressure between the two moving contacts, and a movable electric connection is formed; the left moving contact and the right moving contact can be rotated about the central shaft separately to compensate the assembly error, which is likely to be caused by the symmetrical arrangement of moving contacts and static contacts, and manufacturing tolerance of components, thus the utility model has the advantages of contact synchronism of two moving contacts and static contacts, equalization of contact pressure and contact stability and reliability.
Description
Technical field
The utility model relates to a kind of parts of circuit breaker, especially relates to a kind of current-limiting apparatus with repulsive force mechanism that moving contact and dependency structure thereof have been improved.
Background technology
In appliance circuit; usually install a circuit breaker additional; its effect is equivalent to an automatic switch; under stress state, be used for detecting the unusual of load side electrical circuitry; when abnormal conditions appear in electricity consumption device or circuit; circuit breaker can be made the action of fast cut-off circuit, with the damage that prevents circuit and electric equipment or on fire, and the circuit and the electric equipment of protection load one side.
Current-limiting apparatus is important components very in the circuit breaker, and in order to improve the current limiting performance of circuit breaker, relevant technologies personnel had once made a lot of effort, and current limiting performance also is improved to a certain extent.Such as there being the people to apply for that (number of patent application: 98250818.2), it comprises a moving contact, is fixed with pair of contact on two free end for the patent of " current-limiting apparatus of circuit breaker " by name; Be used for rotating the main shaft that supports moving contact; Stretch out from two sides of main shaft and pass the stub at the center of main shaft and moving contact, constitute the rotation of main shaft and moving contact; A pair ofly decide contact, have the contact on a free end facing to the contact of moving contact, each is decided contact and curves " U " shape; From an outstanding spring catch of the edge of two sides of main shaft; And be located at torque spring on the outer circumference surface of stub, and the one end hook is on spring catch, and the other end is fixed on the moving contact.
But, traditional moving contact is designed to integral type, be difficult to eliminate since on the moving contact that the issuable rigging error of dynamic and static contact symmetric arrangement and parts manufacturing tolerance cause on two terminal contacts and the fixed contact between two terminal contacts to contact priority inconsistent, contact pressure is unequal, makes that contact is very unreliable, and then reduces overall performance, parts are aging easily, increase use cost reduction of service life, and the circuit and the electric equipment of load-side also brought harmful effect.
Summary of the invention
The utility model mainly is to solve the existing in prior technology moving contact to be designed to integral type, and the contact between the difficult dynamic and static contact that can guarantee dynamic and static contact two ends is successively consistent, and contact pressure is unequal, makes very reliable etc. technical problem of contact.
It is not good enough that the utility model has also solved the existing in prior technology overall performance, owes long useful life, both increased use cost, and also circuit and the electric equipment to load-side brings the technical problem of harmful effect etc.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: comprise support, the central shaft of support is provided with moving contact, be symmetrically arranged with two repulsion spares on it, described repulsion spare is arranged on the support by pivot pin, repulsion spare end is provided with back-moving spring, and described moving contact is made of left moving contact and right moving contact, both base portions coincide mutually and are nested with in the lump on the central shaft of described support, and both coincide the part both sides compression spring is set, described compression spring also is nested with on the central shaft of described support, the base portion that two compression springs act on left moving contact and right moving contact coincides on the contact-making surface, contact pressure between the two is provided, constitutes movably electrical connection.
As preferably, the thickness of the base portion that described left moving contact and right moving contact coincide mutually all is roughly half of integral thickness, and both are chimeric mutually.Described left moving contact is connected by central shaft with right moving contact, and the central shaft of can independently having mercy on rotates, and has eliminated on the moving contact on two terminal contacts and fixed contact to contact successively inconsistently between two terminal contacts, and the contact pressure equalization makes that contact is reliable and stable.
As preferably, the back of described left moving contact and right moving contact is equipped with a position-arresting groove, respectively with the right bearing pin phase configuration of the left bearing pin and the fixing right repulsion spare of fixing left repulsion spare.Such structure can be so that moving contact be when rotating, and locality specific is moved reliable and stable.
As preferably, two arm bodies of described left repulsion spare bridge in left moving contact both sides, and the left repulsion axle of its front end is arranged on the left moving contact; Two arm bodies of described right repulsion spare bridge in right moving contact both sides, and the right repulsion axle of its front end is arranged on the right moving contact; Described back-moving spring is arranged on the end of described arm body.The arm body of described repulsion spare is wide substantially, and the setting of two arm bodies middle part is the arcuation flex point that slightly has a downwarp.
As preferably, the baseline rotational angle α scope of described left moving contact and right moving contact is generally 20 °-30 °, during for dynamic and static contact separation, provides enough quenching time and spaces, reduces arc energy, strengthens current limitation effect, has optimized overall performance.
Therefore, it is well-balanced to the utlity model has structure, rationally distributed, design ingenious, moving contact be designed to two can relatively independent rotation the structure that is dynamically connected, thoroughly eliminated since on the moving contact that dynamic and static contact symmetric arrangement issuable rigging error and parts manufacturing tolerance cause on two terminal contacts and the fixed contact between two terminal contacts to contact priority inconsistent, contact pressure is unequal, contact phenomenons such as very unreliable, move reliable and stablely, error is less, and overall performance is comparatively stable, help increasing the service life, reduce characteristics such as use cost.
Description of drawings
Accompanying drawing 1 is a kind of assembly structure schematic diagram of the present utility model;
Accompanying drawing 2 is a kind of main TV structure schematic diagrames of the present utility model.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: a kind of current-limiting apparatus with repulsive force mechanism is assemblied on the circuit breaker.Its structure is for being provided with left moving contact 11 and right moving contact 21 on the central shaft 2 of support 1, both base portions are roughly half of integral thickness, be nested with in the lump after coinciding mutually on the central shaft 2 of support 1, and the both sides of the part that coincides are provided with compression spring 3, compression spring 3 also is nested with on the central shaft 2 of support 1, a left side moving contact 11 and right moving contact 21 central shaft 2 of can independently having mercy on rotates, eliminated on the moving contact on two terminal contacts and fixed contact between two terminal contacts contact successively inconsistent, the contact pressure equalization, make that contact is reliable and stable, and the base portion that two compression springs 3 act on left moving contact 11 and right moving contact 21 coincides on the contact-making surface, contact pressure between the two is provided, constitutes movably electrical connection.Be respectively equipped with left repulsion spare 12 and right repulsion spare 22 on left side moving contact 11 and the right moving contact 21, left side repulsion spare 12 and right repulsion spare 22 are fixed on the support 1 by left bearing pin 13 and right bearing pin 23 respectively, the back of left side moving contact 11 and right moving contact 21 is equipped with a position-arresting groove 4, respectively with the left bearing pin 13 of fixing left repulsion spare 12 and right bearing pin 23 phase configuration of fixing right repulsion spare 22, like this can be so that moving contact is when rotating, locality specific is moved reliable and stable.Two arm bodies of left side repulsion spare 12 bridge in left moving contact 11 both sides, the left repulsion axle 14 of its front end is arranged on the left moving contact 11, two arm bodies of right repulsion spare 22 bridge in right moving contact 21 both sides, the right repulsion axle 24 of its front end is arranged on the right moving contact 21, the arm body of described repulsion spare is wide substantially, and the setting of two arm bodies middle part is the arcuation flex point that slightly has a downwarp.The end of arm body is provided with back-moving spring 6, and back-moving spring 6 other ends are arranged on the bearing pin of offside.The baseline rotational angle α scope of left side moving contact 11 and right moving contact 21 is generally 25 °, during for dynamic and static contact separation, provides enough quenching time and spaces, reduces arc energy, strengthens current limitation effect, has optimized overall performance.
Its current limliting course of action is: when the circuit breaker load-side produces short circuit current, can produce parallel conductor electromagnetic repulsion force between the fixed contact that is arranged to the U-shaped loop and the moving contact, can produce the node electric power between the dynamic and static in addition contact.Short circuit current is bigger, when these two power that act on moving contact during greater than contact pressure, will promote moving contact and scold out, clockwise rotate, and short circuit current is big more, scolds out speed fast more, produce electric current and lonely columnar resistance, set up lonely column voltage rapidly, produce current limitation effect.
In the process that moving contact is scolded out, the repulsion axle clockwise rotates with the rich central shaft of moving contact, and produces slide relative between the repulsion spare, and repulsion spare can be done a spot of clockwise rotating thereupon, and back-moving spring is elongated on a small quantity.When moving contact is further scolded out, when the repulsion axle slides into the arcuation flex point of repulsion spare two arm bodies, the direction that repulsion spare acts on the power of repulsion axle takes place sharply to change, after the arcuation flex point of sliding, line of action of force is consistent with the center line of central shaft basically, moving contact can not got back to initial condition by self-locking.All the other are with reference to prior art.
Moving contact be designed to two can relatively independent rotation the structure that is dynamically connected, when moving contact resets, can compensate because issuable rigging error of dynamic and static contact symmetric arrangement and parts manufacturing tolerance make that two dynamic and static contact contacts are successively consistent, the contact pressure equalization, contact stabilization is reliable.The utility model removes to be made moving contact split type and coincides mutually, and has increased outside the compression spring, does not change all the other structures, produces, assembly technology is simple, and the manufacturing cost increase is very limited.
Claims (7)
1. current-limiting apparatus with repulsive force mechanism, comprise support, the central shaft of support is provided with moving contact, be symmetrically arranged with two repulsion spares on it, described repulsion spare is arranged on the support by pivot pin, repulsion spare end is provided with back-moving spring, it is characterized in that described moving contact is made of left moving contact (11) and right moving contact (21), both base portions coincide mutually and are nested with in the lump on the central shaft (2) at described support, and both coincide the part both sides compression spring (3) is set, described compression spring (3) also is nested with on the central shaft (2) of described support (1).
2. the current-limiting apparatus with repulsive force mechanism according to claim 1, the thickness that it is characterized in that the base portion that described left moving contact (11) and right moving contact (21) coincide mutually all is roughly half of integral thickness, and both are chimeric mutually.
3. the current-limiting apparatus with repulsive force mechanism according to claim 1 and 2, the back that it is characterized in that described left moving contact (11) and right moving contact (21) is equipped with a position-arresting groove (4), respectively with the left bearing pin (13) of fixing left repulsion spare (12) and right bearing pin (23) phase configuration of fixing right repulsion spare (22).
4. the current-limiting apparatus with repulsive force mechanism according to claim 1 and 2 is characterized in that two arm bodies of described left repulsion spare (12) bridge in left moving contact (11) both sides, and the left repulsion axle (14) of its front end is arranged on the left moving contact (11); Two arm bodies of described right repulsion spare (22) bridge in right moving contact (21) both sides, and the right repulsion axle (24) of its front end is arranged on the right moving contact (21); Described back-moving spring (6) is arranged on the end of described arm body.
5. the current-limiting apparatus with repulsive force mechanism according to claim 1 and 2 is characterized in that the baseline rotational angle α scope of described left moving contact (11) and right moving contact (21) is generally 20 °-30 °.
6. the current-limiting apparatus with repulsive force mechanism according to claim 3 is characterized in that the baseline rotational angle α scope of described left moving contact (11) and right moving contact (21) is generally 20 °-30 °.
7. the current-limiting apparatus with repulsive force mechanism according to claim 4 is characterized in that the baseline rotational angle α scope of described left moving contact (11) and right moving contact (21) is generally 20 °-30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032096771U CN2640027Y (en) | 2003-08-10 | 2003-08-10 | Current-limiting device wiht repulsion mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032096771U CN2640027Y (en) | 2003-08-10 | 2003-08-10 | Current-limiting device wiht repulsion mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2640027Y true CN2640027Y (en) | 2004-09-08 |
Family
ID=34289041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032096771U Expired - Fee Related CN2640027Y (en) | 2003-08-10 | 2003-08-10 | Current-limiting device wiht repulsion mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2640027Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100442422C (en) * | 2004-10-07 | 2008-12-10 | Ls产电株式会社 | Contactor assembly for a circuit breaker |
| CN101488425B (en) * | 2008-01-17 | 2011-05-25 | 三菱电机株式会社 | Circuit breaker |
| CN102969190A (en) * | 2011-08-29 | 2013-03-13 | 西门子公司 | Electric switch |
| CN103606494A (en) * | 2013-11-13 | 2014-02-26 | 常熟开关制造有限公司(原常熟开关厂） | A contact system of a switch |
| CN103681144A (en) * | 2013-12-06 | 2014-03-26 | 贵州长征开关制造有限公司 | Double-breakpoint breaker |
| CN105097309A (en) * | 2014-05-07 | 2015-11-25 | 河村电器产业株式会社 | Contact structure used in breaker or switch |
| CN106128843A (en) * | 2016-08-16 | 2016-11-16 | 朱伯秦 | A kind of dual gate knife high voltage isolator |
| CN106783442A (en) * | 2016-12-12 | 2017-05-31 | 上海电器股份有限公司人民电器厂 | A kind of contact system of dual-interruption point breaker |
| CN107342195A (en) * | 2016-05-03 | 2017-11-10 | Ls 产电株式会社 | The current-limiting apparatus of breaker |
-
2003
- 2003-08-10 CN CNU032096771U patent/CN2640027Y/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100442422C (en) * | 2004-10-07 | 2008-12-10 | Ls产电株式会社 | Contactor assembly for a circuit breaker |
| CN101488425B (en) * | 2008-01-17 | 2011-05-25 | 三菱电机株式会社 | Circuit breaker |
| CN102969190B (en) * | 2011-08-29 | 2016-08-17 | 西门子公司 | Electric switch |
| CN102969190A (en) * | 2011-08-29 | 2013-03-13 | 西门子公司 | Electric switch |
| US9111699B2 (en) | 2011-08-29 | 2015-08-18 | Siemens Aktiengesellschaft | Electrical switch |
| CN103606494A (en) * | 2013-11-13 | 2014-02-26 | 常熟开关制造有限公司(原常熟开关厂） | A contact system of a switch |
| CN103681144A (en) * | 2013-12-06 | 2014-03-26 | 贵州长征开关制造有限公司 | Double-breakpoint breaker |
| CN105097309A (en) * | 2014-05-07 | 2015-11-25 | 河村电器产业株式会社 | Contact structure used in breaker or switch |
| JP2015215945A (en) * | 2014-05-07 | 2015-12-03 | 河村電器産業株式会社 | Contact structure in circuit breaker or switch |
| CN105097309B (en) * | 2014-05-07 | 2018-07-03 | 河村电器产业株式会社 | Structure of contact terminal in breaker or switch |
| CN107342195A (en) * | 2016-05-03 | 2017-11-10 | Ls 产电株式会社 | The current-limiting apparatus of breaker |
| CN107342195B (en) * | 2016-05-03 | 2019-07-26 | Ls 产电株式会社 | The current-limiting apparatus of breaker |
| CN106128843A (en) * | 2016-08-16 | 2016-11-16 | 朱伯秦 | A kind of dual gate knife high voltage isolator |
| CN106783442A (en) * | 2016-12-12 | 2017-05-31 | 上海电器股份有限公司人民电器厂 | A kind of contact system of dual-interruption point breaker |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |