CN204332878U - A kind of contact system of circuit breaker - Google Patents
A kind of contact system of circuit breaker Download PDFInfo
- Publication number
- CN204332878U CN204332878U CN201520067050.1U CN201520067050U CN204332878U CN 204332878 U CN204332878 U CN 204332878U CN 201520067050 U CN201520067050 U CN 201520067050U CN 204332878 U CN204332878 U CN 204332878U
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- Prior art keywords
- contact
- circuit breaker
- moving contact
- housing
- gear
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Abstract
The utility model discloses a kind of contact system of circuit breaker, it comprises the fixed contact be fixedly connected on housing and the moving contact be connected to rotationally on housing, and described moving contact realizes connecting and disjunction with described fixed contact under the drive of operating mechanism; Described operating mechanism is comprised and to be coupling respectively on described housing and the handle connected by gear drive and contact gear, also comprises the contact support be fixedly connected on described moving contact, and the reaction spring between described housing and described moving contact; Wherein, described contact gear is provided with actuated by cams portion, and under the elastic force effect of described reaction spring, described contact support to be pressed against in described actuated by cams portion and to realize described contact gear and described moving contact links.This utility model solves original breaker contact system complex structure, and take up room large, cost is high, and technique is loaded down with trivial details, the technical problem that useful life is short.
Description
Technical field
The utility model belongs to small-sized low-voltage circuit breaker technical field, particularly a kind of contact system of circuit breaker.
Background technology
Circuit breaker refer to the electric current that can close, carry and cut-off under normal loop condition and can close, the switching device of carrying and the electric current under cut-offfing abnormal loop condition in official hour.Circuit breaker is divided into primary cut-out and low-voltage circuit breaker by its scope of application.
Low-voltage circuit breaker, also referred to as automatic air-break switch, can be used to connect and disjunction load circuit, also can be used to the motor controlling infrequently to start.The advantages such as low-voltage circuit breaker has multi-protective function (overload, short circuit, under voltage protection etc.), operating value is adjustable, breaking capacity is high, easy to operate, safe, so be widely used.
At present, according to the intelligentized demand of China's supply network, State Grid Corporation of China requires that supply network is intelligent.Therefore, the end effector of supply network is needed---miniature circuit breaker performs upper end signal and possesses tripping operation, closing function.Regulation in " the external on-load switch technical specification of electric energy meter " that State Grid Corporation of China puts into effect recently: on-load switch divides by number of poles six kinds; the wherein two pole on-load switches of 1P+N namely with a protection pole; require to realize reclosing function in miniature circuit breaker 2P (36mm), short circuit breaking capacity (In) is not less than 6KA.The circuit breaker possessing above function has mechanism section and the control circuit part of circuit breaker, because 1P+N circuit breaker width only has 36mm, spatially significantly limit the concept feasible of circuit breaker, therefore make full use of inner space, circuit breaker N pole and Appropriate application space and seem very crucial.
Chinese patent CN204067283U discloses a kind of reclosing device of circuit breaker, it realizes reclosing function by driving handle band moving contact transmission mechanism, described contact transmission mechanism comprises cross-over connection axle, touches bridge, moving contact supporter and moving contact, described tactile bridge rotates and is arranged on housing, the two ends of described cross-over connection axle respectively with driving handle and tactile bridge driving coupling, described moving contact is arranged on moving contact supporter, and described moving contact supporter interlock is arranged at the lower end of tactile bridge.Although this structure achieves above-mentioned technical specification, but there is dynamic/static contact device complex structure, take up room large, the shortcomings such as cost is high, and technique is loaded down with trivial details.In addition, Chinese patent CN204067284U also discloses a kind of N pole switch of miniature circuit breaker reclosing device, movable contact spring is driven by the fan-shaped drive division on axle sleeve handsetting gear in the program, described movable contact spring comprises the connecting portion connected successively, convergence part and curved portions, connecting portion is connected with the first static contact electric welding, this connecting portion and convergence part are in obtuse angle, this curved portions is arranged across breach, and arc part is on the motion path of fan-shaped drive division, under the effect of described fan-shaped drive division, convergence part rotates clockwise around connecting portion and sound contact is connected, when axle sleeve handsetting gear resets, under the resilient force of movable contact spring self, sound contact separation.The contact mechanism structure of this circuit breaker is comparatively simple, but also there is following technical problem: 1. can realize reliable divide-shut brake because this movable contact spring self needs to have elasticity, and after Long-Time Service, convergence part and connecting portion place lose comparatively serious, and useful life is shorter; 2., because the fracture distance of this circuit breaker determines by the bounce amount of movable contact spring, after Long-Time Service, fracture distance can diminish gradually, causes the dielectric voltage withstand intensity of circuit breaker poor; 3. because the curved portions of this movable contact spring is be connected by spot welding with convergence part, and curved portions needs to coordinate with fan-shaped drive division, its arc height needs to meet certain requirement, and this just proposes higher requirement to the moulding process of movable contact spring, causes the production cost of this movable contact spring higher.
Summary of the invention
For the deficiency that prior art exists, the purpose of this utility model is to provide that a kind of structure is simple, part coordinates efficient, and take up room little, cost is low, and technique is relatively simple, long service life and safe and reliable breaker contact system.
For solving the problems of the technologies described above, the utility model discloses a kind of contact system of circuit breaker, it comprises the fixed contact be fixedly connected on housing and the moving contact be connected to rotationally on housing, and described moving contact realizes connecting and disjunction with described fixed contact under the drive of operating mechanism; Described operating mechanism is comprised and to be coupling respectively on described housing and the handle connected by gear drive and contact gear, also comprises the contact support be fixedly connected on described moving contact, and the reaction spring between described housing and described moving contact; Wherein, described contact gear is provided with actuated by cams portion, and under the elastic force effect of described reaction spring, described contact support to be pressed against in described actuated by cams portion and to realize described contact gear and described moving contact links.
Further setting is that described contact support card is connected and is connected on described moving contact.
Further setting is described moving contact is tabular, it has the shake-up end that coordinates with described fixed contact and is connected to the pivoted connection end on described housing by drive axis, between described shake-up end with described pivoted connection end, form the draw-in groove supported for fixing described contact.
Further setting is the upper holding division and lower holding division that described contact support comprises that fixing is respectively connected on the draw-in groove described in both sides up and down of described moving contact, and described upper holding division and described lower holding division are connected on connecting plate.The upper surface of described upper holding division is the globoidal structure of evagination.Described upper holding division is shaped to circular cylinder structure, and its part column side wall is positioned at described draw-in groove.The lower surface of described lower holding division forms boss, and described reaction spring one end is sheathed on described boss, and the other end is pressed against on the convex tendon of described housing.
Further setting is that described housing comprises upper cover and base, and described handle, described contact gear and described moving contact are connected on described base rotationally respectively by power transmission shaft.
In sum, technique scheme of the present utility model has the following advantages compared to existing technology:
(1) in breaker contact system of the present utility model, handle and contact gear adopt gear-driven mode to be connected, and such connected mode is simple and reliable and save space; Moving contact is rotatably connected on housing, and to be coordinated with contact gear by the contact support that is fixed thereon and realize linking, and the reliable effect of moving contact is improved greatly; Reaction spring between housing and moving contact ensure that the fracture distance change between moving contact and fixed contact is little, thus the dielectric voltage withstand intensity of circuit breaker is uprised; The part of composition contact system coordinates efficient, and structure is simple, and manufacturing technique requirent and production cost are all lower.
(2), in breaker contact system of the present utility model, contact support card is connected and is connected on moving contact, and the space that such fixed form can make contact support and moving contact take is less, and stability is better.
(3) moving contact of the present utility model is tabular, and the moving contact one of tabular can reduce the cost of processing and manufacturing, two ampacitys that can ensure circuit breaker.
(4) contact support of the present utility model comprises the upper holding division and lower holding division that fix and connect moving contact, and contact support can be made with moving contact to be like this connected more tight, and fail safe is better, longer service life.
Accompanying drawing explanation
In order to make content of the present utility model be more likely to be clearly understood, below according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein
Fig. 1 is the overall structure schematic diagram of the utility model circuit breaker;
Fig. 2 is the structural representation of the contact system of the utility model circuit breaker;
Fig. 3 is the stereogram of the utility model moving contact;
Fig. 4 is the stereogram that the utility model contact is supported.
In figure, Reference numeral is expressed as:
1-housing, 11-upper cover, 12-base, 2-handle, 3-contact gear, 4-actuated by cams portion, 5-contact is supported, the upper holding division of 51-, holding division under 52-, 53-connecting plate, 6-moving contact, 61-touches end, 62-pivoted connection end, 63-draw-in groove, 7-fixed contact, 8-reaction spring.
Embodiment
Below with reference to accompanying drawing, following examples are used to be further elaborated the utility model.
Be the embodiment of the contact system of the utility model circuit breaker as shown in Figure 1 and Figure 2, it comprises the fixed contact 7 be fixedly connected on housing 1 and the moving contact 6 be connected to rotationally on housing 1, and described moving contact 6 realizes connecting and disjunction with described fixed contact 7 under the drive of operating mechanism; Described operating mechanism is comprised and to be coupling respectively on described housing 1 and the handle 2 connected by gear drive and contact gear 3, also comprise the contact be fixedly connected on described moving contact 6 and support 5, and the reaction spring 8 between described housing 1 and described moving contact 6; Wherein, described contact gear 3 is provided with actuated by cams portion 4, and under the elastic force effect of described reaction spring 8, described contact support 5 to be pressed against in described actuated by cams portion 4 and to realize described contact gear 3 and links with described moving contact 6.
The operation principle of this breaker contact system is: when driving handle 2 closes a floodgate, gear driven contact gear 3 on handle 2 counterclockwise rotates, actuated by cams portion 4 transmission contact support 5 on contact gear 3 moves clockwise, support to move, until moving contact 6 contacts with fixed contact 7 in 5 moving contact 6 directions to fixed contact 7 fixed with contact; Otherwise, when driving handle 2 carries out separating brake, gear driven contact gear 3 clockwise direction on handle 2 rotates, when the actuated by cams portion 4 on contact gear 3 slowly resets, contact supports 5 counterclockwise to rotate under the elastic force effect of reaction spring 8, support that 5 moving contacts 6 fixed move to the direction away from fixed contact 7 with contact, until moving contact 6 and fixed contact 7 disconnect, recover ortho states.
In the contact system of above-mentioned circuit breaker, because handle 2 is connected by gear drive with contact gear 3, whole contact system is taken up room less, simultaneously, moving contact 6 is rotatably connected on housing 1, and supports 5 to coordinate with contact gear 3 by the contact that is fixed thereon to realize linking, the reliable effect of moving contact 6 is improved greatly, and the fracture distance between moving contact 6 and fixed contact 7 is ensured by the elastic force of reaction spring 8, the dielectric voltage withstand intensity of circuit breaker is higher; The design of part of composition contact system is simple, and manufacturing technique requirent is lower, and production cost is lower.
Described contact support 5 is not unique with the mode that is fixedly connected with of described moving contact 6, and be preferably the mode fixing and connect in present embodiment, the space that contact support 5 and moving contact 6 can be made like this to take is less, and stability is better.As distortion, described contact support 5 also can be threaded connection with described moving contact 6, and the alternate manners such as welding connect.
Particularly, as shown in Figure 3, described in the present embodiment, moving contact 6 is in tabular, it has the shake-up end 61 that coordinates with described fixed contact 7 and is connected to the pivoted connection end 62 on described housing 1 by drive axis, forms for fixing the draw-in groove 63 that described contact supports 5 between described shake-up end 61 and described pivoted connection end 62.The described moving contact 6 of tabular can make processing cost lower, and its pivoted connection end 62 forms the through hole being sheathed on power transmission shaft, makes moving contact 6 rotate flexibly; In addition, the moving contact 6 of tabular is more prone to the ampacity ensureing circuit breaker.
Particularly, as shown in Figure 4, contact support 5 described in the present embodiment comprises the upper holding division 51 and lower holding division 52 that fixing is respectively connected on the draw-in groove 63 described in both sides up and down of described moving contact 6, and described upper holding division 51 and described lower holding division 52 are connected on connecting plate 53.In order to make contact support 5 and contact gear 3 steadily link, the upper surface of described upper holding division 51 is the globoidal structure of evagination; More specifically, described upper holding division 51 is shaped to circular cylinder structure, and its part column side wall is positioned at described draw-in groove 63.Certainly, in other execution modes, upper holding division 51 also can be shaped to covering of the fan structure with arcwall face etc., as long as enable actuated by cams portion 4 smooth sliding of its upper surface and contact gear 3.
The lower surface of the lower holding division 52 of described contact support 5 forms boss, and described reaction spring 8 one end is sheathed on described boss, and the other end is pressed against on the convex tendon of described housing 1.In other execution modes, described reaction spring 8 can also directly be resisted against on described moving contact 6.
In addition, housing 1 described in the present embodiment comprises upper cover 11 and base 12, and described handle 2, described contact gear 3 and described moving contact 6 are connected on described base 12 rotationally respectively by power transmission shaft.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And thus the apparent change of extending out or variation be still among the protection range that the utility model creates.
Claims (8)
1. the contact system of a circuit breaker, it is characterized in that: it comprises the fixed contact (7) be fixedly connected on housing (1) and the moving contact (6) be connected to rotationally on housing (1), described moving contact (6) realizes connecting and disjunction with described fixed contact (7) under the drive of operating mechanism; Described operating mechanism comprises being coupling respectively in described housing (1) to be gone up and the handle (2) connected by gear drive and contact gear (3), also comprise the contact support (5) be fixedly connected on described moving contact (6), and be positioned at the reaction spring (8) between described housing (1) and described moving contact (6); Wherein, described contact gear (3) is provided with actuated by cams portion (4), under the elastic force effect of described reaction spring (8), described contact support (5) is pressed against described actuated by cams portion (4) and goes up and realize described contact gear (3) and described moving contact (6) and link.
2. the contact system of circuit breaker according to claim 1, is characterized in that: the fixing of described contact support (5) is connected on described moving contact (6).
3. the contact system of circuit breaker according to claim 1 and 2, it is characterized in that: described moving contact (6) is in tabular, it has the shake-up end (61) coordinated with described fixed contact (7) and the pivoted connection end (62) be connected to by drive axis on described housing (1), forms the draw-in groove (63) for fixing described contact support (5) between described shake-up end (61) and described pivoted connection end (62).
4. the contact system of circuit breaker according to claim 3, it is characterized in that: described contact support (5) comprises the upper holding division (51) and lower holding division (52) that fixing is respectively connected on the draw-in groove described in both sides up and down (63) of described moving contact (6), and described upper holding division (51) and described lower holding division (52) are connected on connecting plate (53).
5. the contact system of circuit breaker according to claim 4, is characterized in that: the upper surface of described upper holding division (51) is the globoidal structure of evagination.
6. the contact system of circuit breaker according to claim 5, is characterized in that: described upper holding division (51) is shaped to circular cylinder structure, and its part column side wall is positioned at described draw-in groove (63).
7. the contact system of circuit breaker according to claim 4, is characterized in that: the lower surface of described lower holding division (52) forms boss, and described reaction spring one end is sheathed on described boss, and the other end is pressed against on the convex tendon of described housing (1).
8. the contact system of circuit breaker according to claim 1, it is characterized in that: described housing comprises upper cover (11) and base (12), described handle (2), described contact gear (3) and described moving contact (6) are connected on described base (12) rotationally respectively by power transmission shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520067050.1U CN204332878U (en) | 2015-01-30 | 2015-01-30 | A kind of contact system of circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520067050.1U CN204332878U (en) | 2015-01-30 | 2015-01-30 | A kind of contact system of circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204332878U true CN204332878U (en) | 2015-05-13 |
Family
ID=53169204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520067050.1U Withdrawn - After Issue CN204332878U (en) | 2015-01-30 | 2015-01-30 | A kind of contact system of circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204332878U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104576248A (en) * | 2015-01-30 | 2015-04-29 | 浙江天正电气股份有限公司 | Breaker contact system |
-
2015
- 2015-01-30 CN CN201520067050.1U patent/CN204332878U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104576248A (en) * | 2015-01-30 | 2015-04-29 | 浙江天正电气股份有限公司 | Breaker contact system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150513 Effective date of abandoning: 20161012 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |