CN202058653U - Moving contact device for contactor - Google Patents

Abstract

A moving contact device for a contactor comprises a moving contact body, wherein the moving contact body is of a sheet shape structure or a rod shape structure, the front end of the moving contact body is connected with a moving contact and a nonferrous metal flexible wire, the other end of the nonferrous metal flexible wire is connected with a moving contact support, the rear end of the moving contact body is provided with a support point rotatablely connected with the moving contact support, two end faces of the moving contact body are relatively vertical, and a stressed structure driven by an external force so as to make the moving contact body rotate around the support point is arranged between two ends of the moving contact body. The moving contact device has the advantages of reducing manufacturing cost and saving resources, and is suitable for the contactor used in the situation that operation frequency is lower and the number of operation is smaller.

Description

The trigger device of contactor

Technical field

The utility model relates to a kind of trigger device that is used for contactor, this trigger device can significantly reduce production costs, be absorbed in more the contactor that use the field of employment low in frequency of operation, that number of operations is less by structural improvement, belongs to the low-voltage electrical apparatus field.

Background technology

Contactor is as big, the wide control apparatus of a kind of amount; be used at control circuit; remote connect open circuit and control motor starting, stop, turning round in disjunction etc.; and can be combined into motor starter with suitable thermal relay or electronic type protective device; the circuit that protection may be transshipped is widely used in industries such as light industry, metallurgy, chemical industry, colliery, machinery, lifting, railway, boats and ships, communication.

At present, on domestic and international market, the moving contact structure of most of contactor all adopts plate shaped or bar shaped, double break point, Direct Action Type, the closure of contact, disconnects and finishing by the upper and lower motion of moving contact.These structure flexible movements, aspect such as under the high situation of frequency of operation, its reliability height, arc extinguishing are good, connection, breaking capacity height has stronger advantage, has obtained general utilization.Pursuing these high performance whiles, also will inevitably bring certain negative effect, as: structure is complicated, cost is more high.And along with the quickening of industrial process, use the place of motor, the increase of different purposes, particularly requiring number of operations less, under the situation of frequency of operation lower (as: reserve pump of factory, family, school only just uses under the situation of cutting off the water, and may just use 1-2 time in every month), how to reduce cost, satisfy this class client's demand, between performance and price, find the binding site of best cost performance, become the common objective of enterprise and electrical apparatus industry development.

In recent years; the cost of raw material goes up year by year; particularly after the financial crisis; the energy-saving and environmental protection notion in every profession and trade deeply; at different use classes,, under the guaranteed performance condition, lower production cost how satisfying different fields of employment or use classes; improving cost performance, has been the inexorable trend of development.

The utility model content

In view of above-mentioned background, the purpose of this utility model provides a kind of for satisfying the trigger device of the contactor of using the field of employment lower in frequency of operation, that number of operations is less, and it can reduce production costs, and economizes on resources.

For achieving the above object, the utility model adopts following technical scheme:

A kind of trigger device of contactor comprises the moving contact body, it is characterized in that:

The moving contact body is sheet or rod shaped structure, and its front end is connected with moving contact;

The front end of described moving contact body is connected with the non-ferrous metal flexible cord;

The rear end of moving contact body is provided with fulcrum, and this fulcrum place connects moving contact rack rotationally;

The both ends of the surface of moving contact body are vertical relatively;

Be provided with the force structure that supplies external force to order about and the moving contact body is rotated around fulcrum between the two ends of moving contact body.

Further:

The fulcrum of described moving contact body is the hole, and described moving contact rack front end is established the hole, and moving contact body and moving contact rack are hinged by bearing pin, and connects (as: torsion spring, extension spring etc.) by suitable elastomeric element.

The sheathed saddle shaped washer in the two ends of described bearing pin.

The other end of described non-ferrous metal flexible cord connects moving contact rack.

The fulcrum of described moving contact body is one of structure of projection, pit, local grooved through hole.

Force structure between the two ends of described moving contact body is the surface of moving contact body, or is one of arris, groove, projection, pit, hole, L type, T type, cross structure of moving contact body.

The beneficial effects of the utility model are:

1,, thereby reduced the temperature rise of binding post because moving contact body self does not carry main electric current; Because of non-ferrous metal flexible cord self material characteristics, can define area, the length of non-ferrous metal flexible cord according to the actual current needs, thereby help contactor in different current specification, adopt identical framework, reach capacity increasing function, thereby the reduction manufacturing cost simultaneously, can improve the reliability of contact apparatus work;

2, be that three-phase is that example is calculated with every contactor: the moving contact structure of contactor is at present, every 2 moving contacts, 2 fixed contacts, 2 arc extinguishing spares of using mutually of its trigger device, trigger device of the present utility model is a rotary type, every 1 moving contact, 1 fixed contact, 1 arc extinguishing spare of using mutually of its trigger device then used for every: 3 * 1=3 moving contact, 3 * 1=3 fixed contact, 3 * 1=3 arc extinguishing spare less.Greatly reduce the use amount of contact and arc extinguishing spare, reduce cost, aim of saving thereby reach.

3, owing to reduced the quantity of moving contact, fixed contact, be equivalent to reduce the quantity of welding or riveted joint work step, also saved processing charges and process time.

Description of drawings

Fig. 1 forms schematic diagram for the utility model parts;

Fig. 2 is the utility model structural representation;

Fig. 3 is the utility model contact schematic diagram when (disjunction) in the raw;

Schematic diagram when Fig. 4 is the utility model closing of contact, disjunction.

Embodiment

The utility model provides a kind of trigger device that can satisfy the contactor of using the field of employment lower in frequency of operation, that number of operations is less, and it can reduce production costs, economize on resources.

Its technical scheme that adopts is: trigger device is combined by moving contact body, moving contact rack, bearing pin, torsion spring, non-ferrous metal flexible cord five parts.Wherein the front end of moving contact body (for having reversed the metallic plate of 90 degree) is connected with a moving contact and non-ferrous metal flexible cord, the rear end is provided with a fulcrum (circular hole), this fulcrum connects as one by bearing pin, pad, plain washer, saddle shaped washer and moving contact rack, and with the bearing pin riveted.One end of torsion spring is hung on the moving contact rack, and the other end hangs on the moving contact body.The other end of non-ferrous metal flexible cord is connected with moving contact rack.

So, make the moving contact body become as a whole with bearing pin, torsion spring, moving contact rack and non-ferrous metal flexible cord.

Become as a whole trigger device to pack in the pedestal of contactor with aforementioned, and the moving contact body penetrated in the contact supporting hole (at this moment, moving contact rack is fixed in the pedestal) link together with moving iron core, when the upper and lower motion of moving iron core, just drive the moving contact body and rotate, finish closure, the disjunction function of dynamic and static contact around fulcrum.

In this trigger device, moving contact body, pad, plain washer, saddle shaped washer, moving contact rack are become an integral body by the bearing pin riveted, the plane of the moving contact that moving contact body front end connects is relative vertical with the face that its rear end fulcrum is connected with bearing pin.Relying on the elastic force of saddle shaped washer to reach the moving contact body can rotate around bearing pin, and with moving contact rack certain frictional force and don't can left and right swing or come off is arranged; One end of torsion spring is contained on the moving contact rack, and the other end hangs on the moving contact body, and can satisfy provides the end pressure that produces after the dynamic and static contact closure.

Further specify below in conjunction with the drawings and specific embodiments:

What as shown in Figure 1, this figure described is the formation of the parts of trigger device.The utility model trigger device is made up of a moving contact rack 1, bearing pin 2, torsion spring 3, moving contact body 4, moving contact 5, plain washer 6, two saddle shaped washers 7, non-ferrous metal flexible cord 8, a pad 16.

What as shown in Figure 2, this figure described is the textural association of trigger device.The compound mode of the utility model structure is in moving contact body 4 front ends and non-ferrous metal flexible cord 8 be stacked together riveted joint or welding with moving contact 5; After a saddle shaped washer 7 is inserted in bearing pin 2, penetrate in the centre bore of fulcrum of moving contact rack 1, moving contact body 4, again a pad 16, saddle shaped washer 7, a plain washer 6 be inserted in the bearing pin 2, again with bearing pin 2 with plain washer 6 riveteds.At last, a torsion spring 3 is stuck on the multidiameter of bearing pin 2 heads, one end of torsion spring 3 is hung on the moving contact body 4, the other end is hung on the moving contact rack 1, with assurance moving contact body 4 and moving contact 5 ends a trend that rotates is arranged, and the other end and the moving contact rack 1 of non-ferrous metal flexible cord 8 are riveted or welding.

In the utility model, the structure at the position of hook torsion spring 3 between the two ends of moving contact body 4 is called force structure, this force structure is the surface between moving contact body 4 two ends.

Both sides respectively add a saddle shaped washer 7 outside the fulcrum of moving contact body 4 rear ends, allow moving contact body 4 when bearing pin 2 rotates and 1 of moving contact rack certain frictional force is arranged, good to guarantee its contact, it is rotated flexibly, thereby guarantee that moving contact 5 can slide, and is unlikely to produce big skew on the route of setting.

In this process, good in order to guarantee the electric conductivity between moving contact body 4 and the moving contact rack 1, the major avenues of approach of flowing through as electric current with a non-ferrous metal flexible cord 8, non-ferrous metal flexible cord 8 one ends weld or are riveted on the front end of moving contact body 4, and the other end welds or is riveted on the moving contact rack 1.

As shown in Figure 3, this figure describes is that trigger device is realized moving contact body 4, fixed contact 9 operation principle when (disjunction) in the raw in contactor.Dig the through hole of rectangle at contact support 11 middle parts of contactor, the front end of moving contact body 4 devices is passed this through hole, when the control coil of contactor is not switched on, the lower surface in the hole of contact support 11 withstand moving contact body 4 below, overcome the downward power of torsion spring, make between moving contact 5 and the fixed contact 10 to maintain a certain distance, this distance is the clearance between open contacts of contactor.

As shown in Figure 4, this figure describes is the trigger device closure of finishing moving contact body 4, fixed contact 9 in contactor, the operation principle of disjunction.

1, closing course: when the control coil 15 of contactor is switched on, make in iron core 12, static iron core 13 attracting process in electromagnetic force, the support force that moving iron core 12 overcomes reaction spring 14 moves downward, drive contact and support that 11 is descending, moving contact body 4 rotates around bearing pin 2 under the torsion that torsion spring 3 produces, after rotating to an angle, moving contact 5 contacts with fixed contact 10, and produces certain pressure (end pressure) and downward overtravel.

2, disjunction (release) process: when control coil 15 dead electricity, the electromagnetic force that moving iron core 12, static iron core are 13 disappears, moving iron core 12 is under reaction spring 14 effects, promoting contact support 11 moves upward, at this moment, after contact is supported 11 lower surface and moving contact body 4 is contacted, moving contact body 4 is rotated up around bearing pin 2 make moving contact 5 and fixed contact 10 disjunctions, be in the described disjunction of Fig. 3 position after rotating up certain angle.

In other embodiment of the present utility model:

The fulcrum of moving contact body also can be one of structure of projection, pit, local grooved through hole, as long as can realize being connected rotationally with moving contact rack.

Force structure between the two ends of moving contact body also can be one of arris, groove, projection, pit, hole, L type, T type, cross structure of moving contact body, as long as can hook elastic construction (as: extension spring, torsion spring etc.).

Force-applying piece between moving contact body and moving contact rack can also be extension spring, as long as can impose on moving contact body contact one end a downward power is arranged.

The contact support can withstand on the centre of moving contact, also can withstand on the left side or the right of moving contact, as long as can make it to finish above-described adhesive, release.

The above embodiments do not constitute any type of restriction to the desired protection range of the utility model; claims of the present utility model have covered all modifications and changes; therefore, making various modifications at the foregoing description all belongs in the protection range of the present utility model with changing.

Claims (7)

1. the trigger device of a contactor comprises the moving contact body, it is characterized in that:

Described moving contact body is sheet or rod shaped structure, and its front end is connected with moving contact;

The front end of described moving contact body is connected with the non-ferrous metal flexible cord;

The rear end of described moving contact body is provided with fulcrum, and the fulcrum place of moving contact body rear end connects moving contact rack rotationally;

The both ends of the surface of described moving contact body are vertical relatively;

Be provided with the force structure that supplies external force to order about and the moving contact body is rotated around fulcrum between the two ends of described moving contact body.

2. the trigger device of contactor as claimed in claim 1 is characterized in that:

The fulcrum of described moving contact body is the hole, and described moving contact rack front end is established the hole, and moving contact body and moving contact rack are hinged by bearing pin, and connects by elastomeric element.

3. the trigger device of contactor as claimed in claim 1 is characterized in that:

The sheathed saddle shaped washer in the two ends of described bearing pin.

4. the trigger device of contactor as claimed in claim 1 is characterized in that:

The other end of described non-ferrous metal flexible cord connects moving contact rack.

5. the trigger device of contactor as claimed in claim 1 is characterized in that:

The fulcrum of described moving contact body is one of structure of projection, pit, local grooved through hole.

6. the trigger device of contactor as claimed in claim 1 is characterized in that:

Force structure between the two ends of described moving contact body is the surface of moving contact body, or is one of arris, groove, projection, pit, hole, L type, T type, cross structure of moving contact body.

7. the trigger device of contactor as claimed in claim 2 is characterized in that:

Described elastomeric element is torsion spring or extension spring.

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