CN203026469U - Moving contact component of moulded case circuit breaker - Google Patents
Moving contact component of moulded case circuit breaker Download PDFInfo
- Publication number
- CN203026469U CN203026469U CN201220663275XU CN201220663275U CN203026469U CN 203026469 U CN203026469 U CN 203026469U CN 201220663275X U CN201220663275X U CN 201220663275XU CN 201220663275 U CN201220663275 U CN 201220663275U CN 203026469 U CN203026469 U CN 203026469U
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- moving contact
- rotor
- connecting rod
- spring
- contact
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Abstract
The utility model relates to a moving contact component of a moulded case circuit breaker. The moving contact component of the moulded case circuit breaker comprises a rotor, a moving contact, a rotary shaft, connecting rods and springs; the rotor is provided with an opening which allows the moving contact to rotate individually in current limiting operation; the moving contact is arranged in the opening, and is connected with the rotor rotatably through the rotary shaft; two ends of the moving contact extend out of the opening; the two pairs of springs are connected with the rotor through the connecting rod, and are respectively arranged at two side surfaces of the rotor; each pair of springs are symmetrically arranged with respect to the center; and one end of each spring is fixed on the rotor through the connecting rod, and the other end of each spring can be connected to the rotor in a linear motion mode, and the connecting rod is hanged on the surface of the moving contact, and moves back and forth between a large groove and a small groove. Compared with the prior art, the moving contact component of the moulded case circuit breaker provided by the utility model has the advantages of simple structure, convenience in installation, good stability, capabilities of separating moving and static contacts rapidly so as to clamp the moving contact to cut off electric arc and prevent arcing again and the like.
Description
Technical field
The utility model relates to a kind of breaker assembly, especially relates to a kind of moving contact component of breaker of plastic casing.
Background technology
Breaker of plastic casing is the protective device in low-voltage distribution system, plays connection, the normal workpiece electric current of disjunction and the automatically effect of fast shut-off fault current when circuit breaks down in low-voltage distribution system.The moving contact component of the breaker of plastic casing of prior art has following problem.When moving contact separated with fixed contact, the elastic-restoring force of spring increased, and moving contact contacts with fixed contact because this restoring force becomes again thus.Contact and again separating therebetween again when this causes short circuit between the contact, thus produce continuously electric arc and can cause the grievous injury of breaker of plastic casing and load equipment.
Summary of the invention
The purpose of this utility model is exactly the moving contact component that a kind of simple in structure, easy for installation, good stability is provided in order to overcome the defective that above-mentioned prior art exists, can effectively separates the breaker of plastic casing of dynamic/static contact.
The purpose of this utility model can be achieved through the following technical solutions:
a kind of moving contact component of breaker of plastic casing, comprise rotor, moving contact, rotation axis, connecting rod and spring, described rotor is provided with for allow the opening of moving contact independent rotation when current limliting operates, described moving contact is arranged in this opening, and be rotationally connected by rotation axis and rotor, and the two ends of moving contact are visited outside this opening, described spring is connected with rotor by connecting rod, described spring is provided with two pairs, be separately positioned on two side surfaces of rotor, described every pair of spring center is symmetrical arranged, described each spring one end is fixed on rotor by connecting rod, but the other end by the connecting rod rectilinear motion be connected on rotor.
Described rotor is provided with the through hole that passes for connecting rod and the chute that moves for link linear, and described through hole is provided with two, and is the diagonal angle setting, and described chute is provided with two, and is the diagonal angle setting.
The center of described rotor is provided be used to the circular hole that passes rotation axis.
Described rotor is provided be used to the grooved inwall that the moving contact space is provided.
Described connecting rod is provided with two pairs, and pair of links is arranged in through hole, and pair of links is arranged in chute, and is affiliated on the moving contact surface, moves back and forth in the groove on moving contact surface.
Symmetrical structure centered by described moving contact, described moving contact center are provided be used to the long kidney-shaped hole that passes rotation axis, and moving contact two ends are provided with moving contact.
Also be provided with centrosymmetric groove on described moving contact.
Compared with prior art, the utility model all is provided with two centrosymmetric springs on each side surface of rotor, and spring one end is fixed on rotor by connecting rod, but the other end by the connecting rod rectilinear motion be connected on rotor, have the following advantages:
1, can effectively prevent from returning to from the moving contact that fixed contact separates the state that contacts with this fixed contact, and can accelerate moving contact from the separation of fixed contact in open circuit state;
2, can keep moving contact from the state of fixed contact separation until carry out trip operation by tripping mechanism;
3, can stably keep contact condition between the moving contact of the fixed contact of fixed contact and moving contact in the closed circuit state;
4, by two side surface mounting spring at rotor, can simply and rapidly spring be assembled to rotating shaft rod;
5, can be in the situation that even fixed contact not accurately about the moving contact symmetry, by be provided for passing the long kidney-shaped hole of rotation axis at the moving contact center, keeps the contact between moving contact and fixed contact equably;
6, compare with other structures, need not to be connected with connecting rod between rotor and moving contact, structure is more simple and reliable.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of moving contact in the utility model;
Fig. 3 is the structural representation of the utility model rotor;
Fig. 4 is the front view of the utility model rotor;
Fig. 5 is that the utility model is at the structural representation of facing of closed circuit state;
Fig. 6 is that the utility model is at the structural representation of facing of open circuit state;
Fig. 7 is that the utility model is remaining open the structural representation of facing of circuit state.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is elaborated.
Embodiment
as shown in Figure 1, a kind of moving contact component of breaker of plastic casing, comprise rotor 1, moving contact 2, rotation axis 12, connecting rod 3 and spring 4, described rotor 1 is provided with for allow the opening 5 of moving contact independent rotation when current limliting operates, described moving contact 2 is arranged in this opening 5, and be rotationally connected by rotation axis 12 and rotor 1, and the two ends of moving contact 2 are visited outside this opening 5, described spring 4 is connected with rotor 1 by connecting rod 3, described spring 4 is provided with two pairs, be separately positioned on two side surfaces of rotor, described every pair of spring center is symmetrical arranged, described each spring one end is fixed on rotor by connecting rod, but the other end by the connecting rod rectilinear motion be connected on rotor, and connecting rod is hung between the big or small groove on moving contact surface and moves back and forth.The spring 4 of the present embodiment can keep contacting between this moving contact and fixed contact under the contact condition of moving contact 2 and fixed contact 7, and when current limliting operates, be that moving contact 2 separates with fixed contact 7 and when rotating with the stationary rotor rightabout, provides an elastic force that makes moving contact 2 and fixed contact 7 accelerate to separate.
As shown in Figure 2, symmetrical structure centered by described moving contact 2, described moving contact 2 centers are provided be used to the long kidney-shaped hole 13 that passes rotation axis, the moving contact two ends are provided with moving contact 6, also be provided with centrosymmetric groove on moving contact, and can turn to the contact position of fixed contact or from the separation point position of fixed contact.The design of long kidney-shaped hole 13 is adopted at moving contact 2 centers, even because the uneven wear of moving contact 6 with fixed contact 8 do not have accurately to be mutually symmetrical based on moving contact 2, the contact between moving contact 6 and fixed contact 8 also can keep equably at fixed contact 7.
As Fig. 3-shown in Figure 4, described rotor 1 is provided with the through hole 11 that passes for connecting rod and for the chute 10 of link linear motion, described through hole 11 is provided with two, and is the diagonal angle setting, and described chute 10 is provided with two, and is the diagonal angle setting.The center of rotor 1 is provided be used to the circular hole 9 that passes rotation axis 12, also is provided with in rotor 1 be used to the grooved inwall that the moving contact space is provided.
Described connecting rod 3 is provided with two pairs, and pair of links is arranged in through hole 11, and pair of links is arranged in chute 10, can be in chute moving linearly, and be affiliated on the moving contact surface, move back and forth in the groove on moving contact surface.Under moving contact and state that fixed contact contacts, connecting rod can keep with the contact condition of the chute of rotor and make spring that contact is provided, be used for when the current limliting that moving contact separates to rotate from fixed contact operates, make spring force reverse by connecting rod with respect to the variation of spring position, accelerate moving contact and separate from fixed contact.Connecting rod contacts with detent surface, reduces mutual frictional force, and then reduces the loss of up and down contact, thereby better keeps uniform contact between moving contact and fixed contact.
In Fig. 2, a, b, c are respectively the position of connecting rod 3 on moving contact 2, and when the connecting rods in chute 10 are positioned at position a, contact is closure state, and after being subject to external force, the connecting rod that the opening of contact makes in chute 10 drives spring 4 and stretches to the motion of position b direction; After moving to position b, connecting rod is positioned at peak, and the spring amount of tension is maximum; Due to effect of inertia, contact continues to open, and due to the effect of spring tension, chute 10 connecting rods continue the curvilinear motion along moving contact 2 sides, and spring shrinks slightly, and contact continues to open; When connecting rod was positioned at position c (being the groove on moving contact 2), link motion was to the minimum point of curve, and due to the effect of spring tension, connecting rod is buckled in this groove, and contact no longer moves.On the contrary, contact is also in like manner from being opened to closed motion principle.
The operation principle of the moving contact component of above-mentioned breaker of plastic casing is specific as follows described:
Fig. 5 is the front view of the moving contact component of the present embodiment breaker of plastic casing, it expresses the state (closed circuit state) that the contact contacts with each other, under the state that contacts with each other in the contact, the lower generation of connecting rod 3 effects that is connected to spring 4 rotates counterclockwise moment (being determined by connecting rod and spring relative position), namely, rotate in the counterclockwise direction the power of moving contact 2 due to the initial elastic force of spring 4.Therefore, each contact 6 of moving contact 2 contacts with the fixed contact 8 of fixed contact 7.
The Surface Contact of the chute 10 of connecting rod 3 and rotor 1.At the closed circuit state, the electric current on circuit is introduced the fixed contact 8 of supply side fixed contact 7, through each moving contact 6 of moving contact 2, and flow to the face terminals (not shown) through the fixed contact of load-side fixed contact.
Fig. 6 is the front view of the moving contact component of the present embodiment breaker of plastic casing, and it expresses the state (open circuit state) that the contact contacts with each other.When the large electric current due to short circuit or earth fault results from circuit, produce electrodynamic repulsion force between the moving contact 6 of moving contact 2 and the fixed contact 8 of fixed contact 7.Therefore, moving contact 2 is along the direction of separating with fixed contact 7, and namely clockwise direction rotates.This electrodynamic repulsion force is much larger than the power of the rotating torque that produces for the spring 4 that rotates counterclockwise moving contact 2, makes moving contact 2 clockwise rotate.The connecting rod 3 that is placed in two sides of moving contact 2 pulls spring 4, simultaneously, and in the interior motion of chute 10 of rotor 1.Namely, when moving contact 2 clockwise rotates, when connecting rod 3 pulls spring 4, connecting rod and spring 4 binding clips are contended gradually be decreased to zero to be connecting rod and spring 4 lines (this is called the dead point) in line.When connecting rod during through the dead point, connecting rod and spring 4 lines form angle at opposite side, thereby the elastic force that makes spring 4 occurs oppositely, rotate counterclockwise moment and be converted to for accelerating moving contact 2 and clockwise rotate moment from the open circuit that fixed contact 7 separates by being used for returning the closed circuit of moving contact 2 to fixed contact 7, thereby having accelerated moving contact 2 separates from fixed contact 7, and in the situation that apply without external force, the trend that clockwise rotates will can not change, and can prevent effectively that moving contact 2 is back to fixed contact 7 and the contact abrasion that causes.
When carrying out the current limliting operation by the moving contact component according to this breaker of plastic casing, moving contact is accelerated from the separation of fixed contact, thus and the current-limiting function of irreversible improvement circuit-breaker.
Fig. 7 is the front view according to the moving contact component of the present embodiment breaker of plastic casing, and it is expressed and completes moving contact from the separation of fixed contact and remain open the state of circuit state.
As shown in Figure 7, by the maintenance of rotor 1 and connecting rod drive moving contact 2 under open circuit state clockwise rotate and irreversible, thereby postpone the motion that moving contact 2 is back to fixed contact 7 and the state that keeps moving contact 2 to separate to fixed contact 7.
As mentioned above, at the moving contact component according to the present embodiment breaker of plastic casing, the connecting rod that is placed in the both sides of moving contact pulls spring, and simultaneously, moving linearly in the chute of rotor.Variation by connecting rod position simultaneously, the elastic force that spring is put on moving contact is converted to for accelerating moving contact and clockwise rotates moment from the open circuit that fixed contact separates from being used for that the closed circuit that moving contact is back to fixed contact is rotated counterclockwise moment, separate from fixed contact thereby accelerated moving contact, thereby make metering function maximum.
Equally, in the final position that reaches that clockwise rotates with the moving contact that separates from fixed contact, thereby stop the released state that moving contact is back to the motion of fixed contact or keeps moving contact.Therefore, prevented that moving contact is back to fixed contact and remains open circuit state until electric arc is extinguished and carry out trip operation by tripping mechanism.
Due in the situation that do not break away from spirit of the present utility model or substantive characteristics, can implement the utility model with some forms, should be appreciated that unless otherwise indicated, the above embodiments are not limited by any details of foregoing description, but understood widely in the spirit and scope that should define in additional claim, and it is included that therefore, all modifications and changes in the equivalent boundary of claim scope or scope all are intended to the claim of being added.
Claims (7)
1. the moving contact component of a breaker of plastic casing, comprise rotor, moving contact, rotation axis, connecting rod and spring, described rotor is provided with for allow the opening of moving contact independent rotation when current limliting operates, described moving contact is arranged in this opening, and be rotationally connected by rotation axis and rotor, and the two ends of moving contact are visited outside this opening, described spring is connected with rotor by connecting rod, it is characterized in that, described spring is provided with two pairs, be separately positioned on two side surfaces of rotor, described every pair of spring center is symmetrical arranged, described each spring one end is fixed on rotor by connecting rod, but the other end by the connecting rod rectilinear motion be connected on rotor.
2. the moving contact component of a kind of breaker of plastic casing according to claim 1, is characterized in that, described rotor is provided with the through hole that passes for connecting rod and the chute that moves for link linear, described through hole is provided with two, and be the diagonal angle setting, described chute is provided with two, and is the diagonal angle setting.
3. the moving contact component of a kind of breaker of plastic casing according to claim 2, is characterized in that, the center of described rotor is provided be used to the circular hole that passes rotation axis.
4. the moving contact component of a kind of breaker of plastic casing according to claim 2, is characterized in that, described rotor is provided be used to the grooved inwall that the moving contact space is provided.
5. the moving contact component of a kind of breaker of plastic casing according to claim 2, is characterized in that, described connecting rod is provided with two pairs, pair of links is arranged in through hole, pair of links is arranged in chute, and is affiliated on the moving contact surface, moves back and forth in the groove on moving contact surface.
6. the moving contact component of a kind of breaker of plastic casing according to claim 1, is characterized in that, symmetrical structure centered by described moving contact, and described moving contact center is provided be used to the long kidney-shaped hole that passes rotation axis, and moving contact two ends are provided with moving contact.
7. the moving contact component of a kind of breaker of plastic casing according to claim 6, is characterized in that, also is provided with centrosymmetric groove on described moving contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220663275XU CN203026469U (en) | 2012-12-05 | 2012-12-05 | Moving contact component of moulded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220663275XU CN203026469U (en) | 2012-12-05 | 2012-12-05 | Moving contact component of moulded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203026469U true CN203026469U (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220663275XU Expired - Lifetime CN203026469U (en) | 2012-12-05 | 2012-12-05 | Moving contact component of moulded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203026469U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103745897A (en) * | 2014-01-06 | 2014-04-23 | 大全集团有限公司 | Conducting rod for current-limiting molded case circuit breaker and moving contact assembly |
| CN105336523A (en) * | 2014-06-30 | 2016-02-17 | 西门子公司 | Switching device and linkage mechanism thereof |
| CN106128883A (en) * | 2016-08-08 | 2016-11-16 | 张文红 | A kind of double-breakpoint contact system for low-voltage circuit breaker |
| CN106531583A (en) * | 2016-12-12 | 2017-03-22 | 上海电器股份有限公司人民电器厂 | Contact system of circuit breaker |
| 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 |
| KR20170124863A (en) * | 2016-05-03 | 2017-11-13 | 엘에스산전 주식회사 | Current limiting device of circuit breaker |
-
2012
- 2012-12-05 CN CN201220663275XU patent/CN203026469U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103745897A (en) * | 2014-01-06 | 2014-04-23 | 大全集团有限公司 | Conducting rod for current-limiting molded case circuit breaker and moving contact assembly |
| CN103745897B (en) * | 2014-01-06 | 2016-06-22 | 南京大全电气研究院有限公司 | A kind of conducting rod for current-limiting type molded case breaker and moving contact component |
| CN105336523A (en) * | 2014-06-30 | 2016-02-17 | 西门子公司 | Switching device and linkage mechanism thereof |
| CN105336523B (en) * | 2014-06-30 | 2018-03-09 | 西门子公司 | Switching device and its link gear |
| KR20170124863A (en) * | 2016-05-03 | 2017-11-13 | 엘에스산전 주식회사 | Current limiting device of circuit breaker |
| KR102464650B1 (en) | 2016-05-03 | 2022-11-10 | 엘에스일렉트릭(주) | Current limiting device of circuit breaker |
| CN106128883A (en) * | 2016-08-08 | 2016-11-16 | 张文红 | A kind of double-breakpoint contact system for low-voltage circuit breaker |
| CN106128883B (en) * | 2016-08-08 | 2019-11-05 | 张文红 | A kind of double-breakpoint contact system for low-voltage circuit breaker |
| CN106531583A (en) * | 2016-12-12 | 2017-03-22 | 上海电器股份有限公司人民电器厂 | Contact system of circuit breaker |
| 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 | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |