CN204885063U - Last electromagnetic mechanism of miniature circuit breaker - Google Patents

Abstract

The utility model relates to an electromagnetic mechanism indicates especially that miniature circuit breaker goes up the electromagnetic mechanism who uses. The utility model discloses a following technical scheme: a last electromagnetic mechanism of miniature circuit breaker which characterized in that: the ejector pin passes the axle centre bore setting of moving iron core and quiet iron core, and the both ends of the ejector pin tip of driven iron core and quiet iron core respectively spread out of, and the one end that quiet iron core was worn out to the ejector pin sets up with moving iron core axial fixity for return atress end, ejector pin for roof pressure work end, the one end that the iron core was worn to set out by the ejector pin, ejector pin and quiet iron core axial activity setting, and the return atress of ejector pin is served to overlap and is established the iron core spring, and the iron core spring moves the iron core quiet iron core that slips away to the elasticity messenger of ejector pin. Thanks to the above technical scheme, the utility model provides a simple structure, wherein move the iron core and quiet iron core outer diameter can be littleer, make whole electromagnetic mechanism the less condition of size under the neotype last electromagnetic mechanism of miniature circuit breaker that does not change of electromagnetic force.

Description

Electromagnetic mechanism on a kind of miniature circuit breaker

Technical field

The utility model relates to a kind of electromagnetic mechanism, refers to the electromagnetic mechanism that miniature circuit breaker uses especially.

Background technology

The electromagnetic mechanism of miniature circuit breaker is to provide transient current protection, short circuit current protection, main employing helix tube type structure.Helix tube type structure is generally made up of coil, yoke, coil rack, dynamic iron core, static iron core, iron core spring, push rod, and dynamic iron core, push rod are fixed together.

Under transient current, short circuit current, coil produces larger electromagnetic force, and drive dynamic iron core to the motion of static iron core direction, therefore dynamic iron core drives push rod motion, and push rod motion makes operating mechanism trip, miniature circuit breaker open circuit.The sectional area of dynamic iron core and static iron core is larger, and the electromagnetic force that coil produces is larger, and the less electromagnetic force of sectional area is less.

The iron core spring of the helix tube type electromagnetic system in the past designed, static iron core are all be through on push rod, and one end of iron core spring is in dynamic iron core or static iron core, cause the diameter of bore of dynamic iron core, static iron core larger, in order to ensure the sectional area area that dynamic iron core, static iron core are certain, the external diameter of dynamic iron core, static iron core needs larger, cause the size of whole electromagnetic system larger, miniature circuit breaker is difficult to more miniaturized.

Applicant has applied for the patent of " a kind of miniature circuit breaker magnetic system structure " on December 26th, 2013, the patent No. is: 201320871094.0, the iron core spring of this patent is set on push rod, conflict on static iron core in one end of iron core spring, the other end is conflicted on dynamic iron core, and the magnetic system of this structure just exists the above-mentioned problem mentioned.

Summary of the invention

The utility model overcomes the deficiency that prior art exists, and provides a kind of structure simple, and the electromagnetic mechanism that wherein dynamic iron core and static iron core outside dimension can be less, this electromagnetic mechanism electromagnetic force when size is less does not change.

To achieve these goals, the utility model is by the following technical solutions: the electromagnetic mechanism on a kind of miniature circuit breaker, include coil, yoke, coil rack, dynamic iron core, static iron core, iron core spring and push rod, wherein coil rack is fixedly installed in yoke, static iron core is fixedly installed on one end of coil rack, coil winding is on coil rack, described dynamic iron core is movably arranged in the through hole of coil rack, it is characterized in that: described push rod is arranged through the axle centre bore of dynamic iron core and static iron core, the end of the two ends of push rod driven iron core and static iron core respectively spreads out of, push rod passes one end of static iron core for pressure working end, top, one end that push rod passes dynamic iron core is return force side, push rod and dynamic iron mandrel are to being fixedly installed, push rod and static iron core are axially movable to be arranged, sheathed iron core spring on the return force side of push rod, the elastic force of iron core spring to push rod makes iron core slip away static iron core.

By adopting such scheme, iron core spring is placed on the outside of dynamic iron core by this programme, owing to not needing to place iron core spring in dynamic iron core, static iron core, the diameter of bore of dynamic iron core, static iron core can be less, the sectional area of corresponding dynamic iron core, static iron core increases, the corresponding increase of electromagnetic force that electromagnetic system produces.Under same sectional area, dynamic iron core, the static iron core outside dimension of the technical program can be less, and corresponding electromagnetic system size can be less, and corresponding miniature circuit breaker size also can be less, save installing space.

Further setting of the present utility model is: described yoke is provided with two side, dual-side interval is arranged, described coil rack one end is erected on a sidewall of yoke, the other end of coil rack is erected on another sidewall of yoke by static iron core, the two ends of described push rod pass the two side of yoke respectively, the end of push rod return force side is provided with shaft block ring, and iron core spring one end is conflicted on shaft block ring, on the corresponding yoke sidewall that the other end is conflicted; Described iron core spring entirety is tapered, and its little head end is conflicted on shaft block ring, and its stub end is conflicted on yoke sidewall.

By adopting such scheme, well iron core spring is coordinated with yoke, such iron core spring does not just need other parts to the elastic force of push rod, and structure enormously simplify, and iron core spring adopts said structure better effects if.

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Accompanying drawing explanation

Fig. 1 is the stereogram of the utility model embodiment;

Fig. 2 is the structure chart of the dynamic iron core of the utility model embodiment reflection and static iron core;

Fig. 3 is the cutaway view of the utility model embodiment.

Embodiment

As shown in Fig. 1-Fig. 3, electromagnetic mechanism on a kind of miniature circuit breaker, include coil 1, yoke 2, coil rack 3, dynamic iron core 4, static iron core 5, iron core spring 6 and push rod 7, wherein coil rack 3 is fixedly installed in yoke 2, static iron core 5 is fixedly installed on one end of coil rack 3, coil 1 winding is on coil rack 3, described dynamic iron core 4 is movably arranged in the through hole of coil rack 3, above-mentioned technical characteristic also has in the prior art, so the present embodiment has just been not described in detail, in the present embodiment, described push rod 7 is arranged through the axle centre bore of dynamic iron core 4 and static iron core 5, the end of the two ends of push rod 7 driven iron core 4 and static iron core 5 respectively spreads out of, push rod 7 passes one end of static iron core 5 for pressure working end 71, top, one end that push rod 7 passes dynamic iron core 4 is return force side 72, push rod 7 and dynamic iron core 4 axial restraint are arranged, push rod 7 and static iron core 5 are axially movable to be arranged, sheathed iron core spring 6 on the return force side 72 of push rod 7, the elastic force of iron core spring 6 pairs of push rods 7 makes iron core 4 slip away static iron core 5, dynamic like this iron core 4 can slippage in coil rack 3 under the effect of coil 1 and iron core spring 6, thus realize the flexible of push rod 7, work just can be carried out in the pressure working end, top 71 of such push rod 7 in miniature circuit breaker, realize instantaneous protection effect, iron core spring 6 is placed on the outside of dynamic iron core 4 by this programme, owing to not needing to place iron core spring 6 in dynamic iron core 4, static iron core 5, the diameter of bore of dynamic iron core 4, static iron core 5 can be less, and the sectional area of corresponding dynamic iron core 4, static iron core 5 increases, the corresponding increase of electromagnetic force that electromagnetic system produces.Under same sectional area, the dynamic iron core of the technical program, static iron core 5 outside dimension can be less, and corresponding electromagnetic system size can be less, and corresponding miniature circuit breaker size also can be less, saves installing space.

In the utility model embodiment, described yoke 2 is provided with two side 21,22, dual-side 21,22 interval is arranged, described coil rack 3 one end is erected on a sidewall 21 of yoke 3, the other end of coil rack 3 is erected on another sidewall 22 of yoke 2 by static iron core 4, the two ends of described push rod 7 pass the two side 21,22 of yoke 2 respectively, the end of push rod 7 return force side 72 is provided with shaft block ring 721, conflict on shaft block ring 721 in iron core spring 6 one end, on the corresponding yoke sidewall 21 that the other end is conflicted; Described iron core spring 6 is overall tapered, and its little head end is conflicted on shaft block ring 721, and its stub end is conflicted on yoke sidewall 21.By adopting such scheme, well iron core spring 6 is coordinated with yoke 2, the elastic force of such iron core spring 6 pairs of push rods 7 does not just need other parts, structure enormously simplify, the same day, we also can arrange accessory in said structure, iron core spring 6 is conflicted in accessory, produces elastic force to push rod 7, this spline structure will be complicated, usually do not adopt.

The utility model disclosed, and is the one of preferred embodiment, such as the change of local or modification and come from technological thought of the present utility model and be easy to the person of knowing by inference by the people haveing the knack of this technology, does not all take off patent category of the present utility model.

Claims (3)

1. the electromagnetic mechanism on a miniature circuit breaker, include coil, yoke, coil rack, dynamic iron core, static iron core, iron core spring and push rod, wherein coil rack is fixedly installed in yoke, static iron core is fixedly installed on one end of coil rack, coil winding is on coil rack, described dynamic iron core is movably arranged in the through hole of coil rack, it is characterized in that: described push rod is arranged through the axle centre bore of dynamic iron core and static iron core, the end of the two ends of push rod driven iron core and static iron core respectively spreads out of, push rod passes one end of static iron core for pressure working end, top, one end that push rod passes dynamic iron core is return force side, push rod and dynamic iron mandrel are to being fixedly installed, push rod and static iron core are axially movable to be arranged, sheathed iron core spring on the return force side of push rod, the elastic force of iron core spring to push rod makes iron core slip away static iron core.

2. the electromagnetic mechanism on miniature circuit breaker according to claim 1, it is characterized in that: described yoke is provided with two side, dual-side interval is arranged, described coil rack one end is erected on a sidewall of yoke, the other end of coil rack is erected on another sidewall of yoke by static iron core, the two ends of described push rod pass the two side of yoke respectively, the end of push rod return force side is provided with shaft block ring, iron core spring one end is conflicted on shaft block ring, on the corresponding yoke sidewall that the other end is conflicted.

3. the electromagnetic mechanism on miniature circuit breaker according to claim 2, is characterized in that: described iron core spring entirety is tapered, and its little head end is conflicted on shaft block ring, and its stub end is conflicted on yoke sidewall.