CN103794412B - A kind of electromagnetic relay and manufacture method thereof - Google Patents

Abstract

The present invention relates to a kind of electromagnetic relay and manufacture method thereof, belong to electromagnetic relay technical field.A kind of electromagnetic relay, comprises base plate (1), reed (2), fixed contact (6), coil (8), armature (10), moving contact (11), it is characterized in that: also comprise yoke, iron core, the tail end of described iron core has and the frustum of iron core in one, described yoke is offered the riveted holes corresponding with described frustum shape, described frustum and described riveted holes are designed to interference fit, and described iron core is riveted by described frustum and yoke.The present invention is that electromagnetic relay Automated assembly provides strong support; Fundamentally ensure that the consistency of all relay excess of stroke; Eliminate the operating procedure also needing after having assembled manually to correct the excess of stroke; Significantly improve production efficiency; Improve the quality of production of electromagnetic relay; Only need set and control total excess of stroke, without the need to determining respectively and control design case excess of stroke D and riveted joint excess of stroke C.

Description

A kind of electromagnetic relay and manufacture method thereof

Technical field

The present invention relates to a kind of electromagnetic relay and manufacture method thereof, belong to electromagnetic relay technical field.

Background technology

Electromagnetic relay is a kind of electronic control device, is usually applied in automatic control circuit, and it is actually the one " automatic switch " removing to control larger current, higher voltage with less electric current, lower voltage.Therefore play the effects such as automatic adjustment, safeguard protection, change-over circuit in circuit.

The structure of relay as Figure 1-3, rivet by reed 2 and armature 10, yoke 9; Iron core 5 and yoke 9 are riveted; Moving contact 11 and reed 2 are riveted; Fixed contact 6 and lead-out wire 7 are riveted.Armature 10, yoke 9, iron core 5 are permeability magnetic material.Reed 2 is elastic copper alloy material.

See Fig. 4-5, when after coil electricity, coil produces magnetic field magnetic force, under this magneticaction, armature for the center of circle rotates clockwise, and is with movable contact spring, moving contact synchronous axial system, till armature and iron core end face are fitted with fulcrum A, now, armature, yoke, iron core form a closed magnetic circuit, and moving contact contacts with fixed contact, and electric current (voltage) signal that reed carries flows to other path via the conducting of moving contact, fixed contact, now, relay is in running order.When after coil blackout, coil magnetic field (magnetic force) disappears, reed is under himself elastic reaction, be with moving armature with fulcrum A for the center of circle rotates counterclockwise, till moving contact top contacts with margining tablet 3, now, moving contact is separated with fixed contact, electric current (voltage) signal disconnects, and now, relay is in off state.

See Fig. 6-7, below the concept of relay " excess of stroke " is introduced: as described above, when after relay coil energising, armature band movable contact spring, moving contact rotate clockwise, when moving contact and fixed contact Contact, the distance between armature and iron core end face is referred to as " excess of stroke " (with core center line for benchmark).Object: when dynamic and static contact is at switch current (voltage) signal, mechanical wear can be produced between dynamic and static contact, and namely the excess of stroke is guarantee that dynamic and static contact has certain wear extent in design, and ensure the reliable switching of electric current (voltage) signal.The excess of stroke of relay is very important parameter for relay, in batch production, guarantees that the consistency of the excess of stroke of all relays is the critical factor ensureing relay quality.

See Fig. 8, in the design of relay, " excess of stroke " is generally made up of two parts: with yoke end face for datum line, divides two parts by the excess of stroke of relay: the design excess of stroke for relay of ABL, is designated D; Below datum line is the riveted joint excess of stroke of relay iron, is designated C, is highly obtained rivet excess of stroke C by the riveted joint controlling iron core and yoke.

See Fig. 9-14, in prior art, the control for riveted joint excess of stroke C is realized by following assembling process:

1. iron core is through skeleton; Iron core afterbody frustum is through yoke riveted holes; With punch press, iron core afterbody frustum and yoke are riveted; By punch press setting riveted joint height, guarantee that the iron core end face after riveting and yoke/armature face of hinge have certain " pre-riveting difference in height C ", as shown in Figure 9;

2. the yoke component after riveting is encased in bottom deck assembly, as shown in Figure 10;

3. armature component is encased in yoke component wherein, and reed and yoke are riveted.So far, Product Assembly completes, as shown in figure 11;

4. see Figure 12-14, the excess of stroke=C+D, can find out, the assembling of prior art, due to following factor, ensures that the excess of stroke of relay is very difficult:

A: the height of yoke and hinged of armature has certain tolerance;

B: during punch press riveting iron core, setting height has certain tolerance, and iron core is syllogic, riveted joint difficulty, iron core are stressed larger, yielding;

C: after fixed contact assembling, its position height has certain tolerance;

D: armature, reed, moving contact three rivet the certain tolerance of rear phase mutual;

Above-mentioned four cause relay to assemble after, its excess of stroke consistency is poor, and therefore, after mounting, the excess of stroke needs artificial to correct its consistency of guarantee traditional relay.

Summary of the invention

The technical issues that need to address of the present invention are: existing electromagnetic relay, in the fabrication process, the riveted joint excess of stroke C highly obtained by the riveted joint controlling iron core and yoke due to: the height of yoke and hinged of armature has certain tolerance; During punch press riveting iron core, setting height has certain tolerance, and iron core is syllogic, and riveted joint difficulty, iron core are stressed larger, yielding; After fixed contact assembling, its position height has certain tolerance; Armature, reed, moving contact three rivet the certain tolerance of rear phase mutual; So excess of stroke consistency is poor, therefore, after mounting, the excess of stroke needs its consistency of manual synchronizing guarantee to traditional relay.

The present invention takes following technical scheme:

A kind of electromagnetic relay, comprise base plate 1, reed 2, fixed contact 6, coil 8, armature 10, moving contact 11, also comprises yoke, iron core, the tail end of described iron core has and the frustum of iron core in one, and described yoke is offered the riveted holes corresponding with described frustum shape, described iron core is riveted by described frustum and yoke.

Further, described frustum is the frustum of a cone.

Further, the tapering of the described frustum of a cone is 2 °-4 °.

A manufacture method for above-mentioned electromagnetic relay, comprises the following steps:

1) rivet in advance: by riveted holes corresponding on the frustum of iron core tail end press-in yoke, stop being pressed into when iron core end face 5a is concordant with yoke end face 9a, iron core and described riveted holes elastic conjunction;

2) press down power source band dynamic head 12 to press down, described pressure head 12 arranges displacement transducer, pressure head 12 moves down and actuating spring 2, armature 10, moving contact 11 synchronizing moving;

3) when moving contact 11 and fixed contact 6 Contact, displacement transducer starts to measure overrun distance;

4) pressure head continues to move down, until when armature 10 and iron core end contact, records design excess of stroke D;

5) pressure head continues to move down, and when displacement is riveted joint excess of stroke C, when namely C+D equals the relay design excess of stroke, pressure head stops pressing down movement;

6) frustum stretched out outside yoke is riveted on yoke by the punching press power source being in the iron core other end.

Feature of the present invention is: the hypomere of iron core is designed to taper type, the riveted holes of yoke corresponds, tapering is less, described frustum and described yoke riveted holes are interference fit, frustum inserts riveted holes can according to the change of downforce, progressively press down, make whole depression distance become a stepping process.And iron core adopts syllogic in prior art, iron core tail end is step, and compression power can only press down according to setpoint distance one step and put in place.The structure object arranging this taper type is to adopt the pressure head being with displacement transducer, after moving contact contacts with fixed contact, displacement transducer just starts to measure overrun distance, because reed has certain elasticity, so pressure head can also continue to press down, reed is forced to be out of shape, equipment only need set a total design excess of stroke, and when the C+D that displacement transducer records equals the relay design excess of stroke, pressure head stops pressing down movement, thus guarantee that electromagnetic relay in the fabrication process, the consistency of the excess of stroke.Again the excess of stroke is adjusted after having assembled, also without the need to determining respectively and control design case excess of stroke D and the riveted joint excess of stroke C during assembling.

Beneficial effect of the present invention is:

1) for electromagnetic relay Automated assembly provides strong support.

2) achieve full-automatic production, and achieve the Automated condtrol of the excess of stroke.

3) fundamentally ensure that the consistency of all relay excess of stroke.

4) eliminate assembled after also need the operating procedure of manually excess of stroke being corrected.

5) significantly improve production efficiency.

6) improve the quality of production of electromagnetic relay.

7) only need set and control total excess of stroke, without the need to determining respectively and control design case excess of stroke D and riveted joint excess of stroke C.

Accompanying drawing explanation

Fig. 1 is the three-dimensional structure diagram of electromagnetic relay.

Fig. 2 is the three-dimensional structure diagram of electromagnetic relay when not installing armature and reed.

Fig. 3 is the profile of the electromagnetic relay of prior art.

Schematic diagram when Fig. 4 is electromagnetic relay coil power-off.

Schematic diagram when Fig. 5 is electromagnetic relay coil energising.

Fig. 6 is electromagnetic relay travel position schematic diagram.

Fig. 7 is the enlarged drawing at B place in Fig. 6.

Fig. 8 illustrates the relay excess of stroke and equals design excess of stroke D+ riveted joint excess of stroke C.

Fig. 9 is the first step in the manufacture method of prior art electromagnetic relay, by punch press setting riveted joint height, and the schematic diagram of reserved riveted joint excess of stroke C.

Figure 10 is the second step in the manufacture method of prior art electromagnetic relay, is encased in bottom deck assembly by the yoke component after riveted joint.

Figure 11 is the third step in the manufacture method of prior art electromagnetic relay, and armature component is encased in yoke component, and wherein, reed and yoke are riveted, and complete Product Assembly.

Figure 12 is the schematic diagram corresponding with Figure 11, and position is paid close attention at circle position.

Figure 13 is the enlarged drawing at circle position and position, excess of stroke place in Figure 12, and mark D represents the design excess of stroke.

Figure 14 is on the basis of Figure 13, denotes riveted joint excess of stroke C further.

Figure 15 is the structural representation of prior art electromagnetic relay iron core and yoke.

Figure 16 is the structural representation of electromagnetic relay iron core of the present invention and yoke.

Figure 17 is in electromagnetic relay manufacture method of the present invention, the schematic diagram of pre-riveting step.

Figure 18 is in electromagnetic relay manufacture method of the present invention, armature component is encased in the schematic diagram of step in yoke component.

Figure 19 adopts the pressure head of band displacement transducer to press down the schematic diagram of step to reed, armature, moving contact.

In figure, 1. base plate, 2. reed, 3. margining tablet, 4. skeleton, 5. iron core, 6. fixed contact, 7. lead-out wire, 8. coil, 9. yoke, 10 armature, 5a. iron core end face, 9a. yoke end face.

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is further described.

Electromagnetic relay of the present invention and prior art difference part is structurally shown see Figure 15-16, two width figure is clear.In order to ensure the excess of stroke of relay, in full-automatic assembling, following improvement is done to iron core and yoke structure: iron core changes two-part into by syllogic; Iron core tail end has the tapering of 3 degree; Yoke riveted holes and iron core tail end are interference fit;

See Figure 17, carry out pre-riveting to iron core, concrete steps are as follows: iron core penetrates skeleton (coil); Punch press is by the riveted holes of the frustum of iron core tail end press-in yoke; Stop being pressed into when iron core end face 5a is concordant with yoke end face 9a; Now, the riveted holes of iron core and yoke is elastic conjunction.

See Figure 18, armature component is encased in yoke component, now assembles and do not complete, iron core and yoke are still in pre-riveting status.

See Figure 19, the relay excess of stroke is measured and the riveted joint of iron core tail end automatically, and detailed process is as follows:

Pressure head 12 is provided with displacement transducer, and pressure head 12 moves down and actuating spring, armature, moving contact synchronizing moving; When moving contact and fixed contact Contact, displacement transducer starts displacement calculating distance, namely starts the measuring relay excess of stroke; Pressure head 12 continues to move down, and actuating spring, armature continue to move down, and when armature and iron core end contact, now shift length is D, namely designs the excess of stroke; Pressure head continues to move down, and actuating spring, armature, iron core move down, and displacement is C, when D+C equals the relay design excess of stroke, and displacement transducer feedback signal, pressure head 12 stops promoting; The frustum stretched out outside yoke is riveted on yoke by iron core to be in the punching press power of the iron core other end.Now, assembling completes.

Also can find out from accompanying drawing 19, two-part iron core after improvement, its tail end has certain taper, automatic production line can be coordinated to measure and the excess of stroke of automatic control relay, guarantee the consistency of all relay excess of stroke, improve former syllogic iron core after assembling, its excess of stroke needs artificial defect of correcting, both meet the production requirement of full automatic line, significantly enhanced productivity, in turn ensure that the better quality of relay.

From another angle, equipment only need set a total design excess of stroke, and when the C+D that displacement transducer records equals the relay design excess of stroke, pressure head stops pressing down movement, thus guarantees that electromagnetic relay in the fabrication process, the consistency of the excess of stroke.Also without the need to determining respectively and control design case excess of stroke D and the riveted joint excess of stroke C during assembling.

Claims (3)

1. a manufacture method for electromagnetic relay, is characterized in that:

Electromagnetic relay comprises base plate (1), reed (2), fixed contact (6), coil (8), armature (10), moving contact (11); Also comprise yoke, iron core, the tail end of described iron core has and the frustum of iron core in one, described yoke is offered the riveted holes corresponding with described frustum shape, described frustum and described riveted holes are designed to interference fit, and described iron core is riveted by described frustum and yoke;

Described manufacture method comprises the following steps:

1) rivet in advance: by riveted holes corresponding on the frustum of iron core tail end press-in yoke, stop being pressed into when iron core end face (5a) is concordant with yoke end face (9a), iron core and described riveted holes elastic conjunction;

2) press down power source band dynamic head (12) to press down, (12) arrange displacement transducer to described pressure head, and pressure head (12) moves down and actuating spring (2), armature (10), moving contact (11) synchronizing moving;

3) when moving contact (11) and fixed contact (6) Contact, displacement transducer starts to measure overrun distance;

4) pressure head continues to move down, until when armature (10) and iron core end contact, records design excess of stroke D;

5) pressure head continues to move down, and when displacement is riveted joint excess of stroke C, when namely C+D equals the relay design excess of stroke, pressure head stops pressing down movement;

6) frustum stretched out outside yoke is riveted on yoke by the punching press power source being in the iron core other end.

2. manufacture method as claimed in claim 1, is characterized in that: described frustum is the frustum of a cone.

3. manufacture method as claimed in claim 1, is characterized in that: the tapering of described frustum is 2 °-4 °.