CN217983219U - Iron core and relay - Google Patents

Abstract

The utility model relates to an iron core and relay, the entity that is U type structure of iron core for having certain thickness, including central authorities section and connect at central authorities section both ends, be two magnetic pole sections of dog-ear with central authorities section, the terminal surface of magnetic pole section is the magnetic pole face, central authorities section is thin more with respect to the magnetic pole section, in order to increase the coil wire winding space of central authorities section periphery. The utility model discloses under the condition that does not change the magnetic pole face area for the relative magnetic pole section of central authorities section is thin more, and the coil coiling just can have bigger wire winding space when central authorities section periphery, thereby improves the ampere of the number of turns of coil coiling.

Description

Iron core and relay

Technical Field

The utility model relates to a technical field, concretely relates to iron core structure's improvement are made to the relay.

Background

The third generation communication relay is widely applied to the fields of testing, communication, security protection and the like, and provides higher requirements for the performance of the communication relay under the current development requirements, and an important subject is how to reduce the energy consumption of the relay on the basis of ensuring that the relay is small in size, high in sensitivity and good in reliability.

An electromagnetic device formed by an iron core and a coil is one of key components of a relay, the power consumption of the coil of the existing third-generation communication relay is basically between 100mW and 200mW, and the requirements of customers on lower power consumption and higher sensitivity of the communication relay are difficult to meet. In the structure of the existing third-generation communication relay, one key factor for restricting the power consumption of the coil is that the ampere turn of the coil is small under the condition of a given iron core volume, the gap between an iron core pole face and an armature pole face is large, and the small ampere turn of the coil can cause that the suction force of the coil is not enough to overcome the air gap reluctance, so that the relay can not stably act.

SUMMERY OF THE UTILITY MODEL

Therefore, to the above problem, the utility model provides a configuration optimization's iron core to improve the wire winding space of coil on the basis that does not change iron core polar surface area, simultaneously, still propose the relay that has this iron core based on the iron core.

The utility model discloses a following technical scheme realizes:

the utility model provides an iron core, for having the entity that is U type structure of certain thickness, include central authorities section and connect at central authorities section both ends, be two magnetic pole sections of dog-ear with central authorities section, the terminal surface of magnetic pole section is the magnetic pole face, central authorities section is thin more with respect to the magnetic pole section, in order to increase the coil wire winding space of central authorities section periphery.

Preferably, an axial direction defining a break angle of the iron core at which the central section and the two magnetic pole sections meet is a width direction, and a dimension of the central section in at least one measuring direction of the width and the thickness is smaller than a dimension of the magnetic pole section in a corresponding same measuring direction of the tail end of the magnetic pole section.

Wherein preferably the dimensions of the central segment and a portion of the pole segment in at least one of the width and thickness measuring directions are each smaller than the corresponding same measuring direction dimension of the pole segment at its end.

Wherein preferably the metal density of the central section is greater than the metal density of the pole segments at their ends.

Preferably, a straight-line-shaped groove is formed in the inner angle of the bending part of the central section and the magnetic pole section along the direction of the bending angle axis.

Preferably, the central section and the magnetic pole section are formed by bending and molding a linear strip material along two linear grooves.

Wherein, preferably, there is a sudden thickness change on the magnetic pole section to form a positioning step.

Preferably, the step surface of the positioning step is parallel to the magnetic pole surface.

Preferably, the central section and the magnetic pole section are formed by bending and molding a linear strip material, the positioning step is arranged in a bending deformation area close to the bending angle axis of the central section and the magnetic pole section, and the positioning step is configured to: before the central section and the magnetic pole sections are bent, the step surface of the positioning step is a slope-shaped inclined plane, so that the two step surfaces form a trapezoid groove with an outward flaring on the central section.

Preferably, the width of the end of the pole segment is greater than that of the central segment, so as to form a wider segment and a narrower segment on the iron core, and the wider segment and the narrower segment are transited by a slope-shaped transition plane.

Preferably, the transition plane is disposed at a middle position of the magnetic pole section.

Based on foretell iron core, the utility model discloses still provide the relay, including magnetic circuit and contact system, magnetic circuit includes electromagnetic means, electromagnetic means includes iron core and iron core fixed assembly's coil former and coiling in the coil of iron core periphery, the iron core is foretell iron core.

The utility model discloses following beneficial effect has: the utility model discloses under the condition that does not change the magnetic pole face area for the relative magnetic pole section of central authorities section is thin more, and the coil coiling just can have bigger wire winding space when central authorities section periphery, thereby improves the ampere of the number of turns of coil coiling. The grooves which are in a straight shape along the direction of the folding angle axis are arranged at the inner angles of the bending parts of the central section and the magnetic pole sections, so that the thickness of the bending parts is reduced, the value of the internal stress of the bending parts during bending is reduced, the problems of outer diameter bending cracking and inner diameter bulging are avoided, and the size consistency and the strength of the iron core are ensured.

Drawings

Fig. 1 is a schematic perspective view of an iron core in embodiment 1;

fig. 2 is a front view of a core in embodiment 1;

fig. 3 is a left side view of the iron core in embodiment 1;

fig. 4 is a schematic view of the shape of a strip of an iron core of example 1 before bending;

fig. 5 (a) is a schematic diagram (without a groove) of embodiment 1 for reducing the internal stress value of a bending part when the iron core is bent through the groove;

fig. 5 (b) is a schematic diagram (with a groove) of embodiment 1 for reducing the internal stress value of the bending portion when the iron core is bent;

fig. 6 (a) is a schematic view of the angle change of the step surface of the positioning step before and after bending in embodiment 1 (before bending);

fig. 6 (b) is a schematic view of the angle change of the step surface of the positioning step before and after bending in embodiment 1 (after bending);

fig. 7 is a schematic view of processing of an iron core using a progressive die in embodiment 1;

FIG. 8 is a schematic perspective view of an electromagnetic device according to embodiment 3;

FIG. 9 is a sectional view of the electromagnetic device in embodiment 3;

FIG. 10 is a schematic perspective view of a relay according to embodiment 4;

fig. 11 is a sectional view of the relay according to embodiment 4.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. The components in the drawings are not necessarily to scale, and similar reference numerals are generally used to identify similar components.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

Example 1:

referring to fig. 1, as the preferred embodiment of the present invention, an iron core is provided, which is an entity with a certain thickness and is in a U-shaped structure, and includes a central section 1 with a middle section length and two magnetic pole sections 2 connected to two ends of the central section 1 and forming a 90 ° bevel with the central section 1, wherein the end face of the magnetic pole section 2 is a magnetic pole face 21. In which the central segment 1 is a rectangular strip structure, and referring to fig. 1-3, for convenience of description, the following definitions are provided: the axial direction P of the bevel at the intersection of the central segment 1 and the two magnetic pole segments 2 is the width direction, then the dimension c and the dimension d are the width dimension of the end of the magnetic pole segment 2 and the width dimension of the central segment 1 respectively, and the dimension a and the dimension b are the thickness dimension of the magnetic pole segment 2 and the thickness dimension of the central segment 1 respectively. The dimension b is smaller than the dimension a, and the dimension d is smaller than the dimension c, so that the cross-sectional area of the central section 1 is smaller than the area of the magnetic pole face 21, under the condition that the area of the magnetic pole face 21 is not changed, the central section 1 becomes thinner relative to the magnetic pole section 2, and when the coil is wound on the periphery of the central section 1, a larger winding space can be provided, and the ampere-turn number of the coil winding is increased.

In other embodiments, the size of the central segment 1 in one of the thickness direction and the width direction may be reduced, and the purpose of thinning the central segment 1 may still be achieved. However, in this embodiment, the size of the central section 1 is reduced in both the thickness direction and the width direction, so that the winding space of the coil is increased to the maximum extent, and the material is saved.

In addition, the pole segment 2 may be thicker than the central segment 1 in the whole segment, or the pole segment 2 may be thicker than the central segment 1 only at the end including the pole face 21, and the rest of the pole segment may be as thick as the central segment 1 or even thinner than the central segment 1. For example, referring to fig. 2 and 3, the thickness dimension a of the whole magnetic pole segment 2 is larger than the thickness dimension b of the central segment 1, but in the width dimension, the width dimension c of only the end of the magnetic pole segment 2 is larger than the width dimension d of the central segment 1, and the width of the initial segment connecting the magnetic pole segment 2 with the central segment 1 is equal to the width of the central segment 1.

In this embodiment, the iron core is formed by bending a bar-shaped material in a line shape, as shown in fig. 4, which shows the shape of the bar-shaped material before bending the central segment 1 and the magnetic pole segments 2. In this embodiment, a linear bar-shaped material is cut off in the width direction of the central section 1 and the partial magnetic pole sections 2 by a punching process, the central section 1 is flattened by a punching process in the thickness direction, and finally the two magnetic pole sections 2 are bent to obtain an iron core finished product. After the punching and smashing, the size b is smaller than the size a, and the size d is smaller than the size c. The metal density of the central section 1 is therefore greater than the metal density of the pole sections 2 at their ends.

As shown in fig. 2 and 4, a groove 3 in a shape like a straight line along the direction of the folding angle axis is formed at the inner angle of the bending part of the central segment 1 and the magnetic pole segment 2 to reduce the thickness of the bending part, thereby reducing the value of the internal stress of the bending part during bending, avoiding the problems of cracking of the outer diameter bending and bulging of the inner diameter, and ensuring the size consistency and strength of the iron core. Particularly, in the embodiment, after the central section 1 is flattened, the hardness of the base material is increased, and the problem of cracking of the bending outer diameter caused by material extrusion during bending is more likely to occur, and the embodiment can well avoid the defect by arranging the groove 3. In addition, through setting up recess 3, played the effect that forms the crease for back magnetic pole section 2 is 90 with central segment 1 after bending, can guarantee the uniformity of iron core U type opening size, thereby guarantees the depth of parallelism of magnetic pole face 21 relative to the horizontal plane.

The principle that the groove 3 reduces the internal stress value of the bending part during bending can be seen in fig. 5 (a) and 5 (b), when the strip is bent along the bending line without a groove, the strip is extruded above the central line of the material and stretched below the central line, the internal stress applied farther away from the central line is larger, so that the internal stress at the position away from the central line h/2 is the largest, and cracks and bulging are most easily generated. After the groove 3 is added, the thickness g (g size is less than h size) of the bending part can be effectively shortened, so that the maximum distance of the bending part is reduced from h/2 to g/2, the value of internal stress is reduced, and the problems of cracking of bending of the outer diameter and bulging of the inner diameter are avoided.

As shown in fig. 2, the magnetic pole segment 2 has a thickness variation with a step reduction to form a positioning step 4, when the iron core of this embodiment is used to mold the coil frame (see embodiment 2), the positioning step 4 can assist positioning, so as to ensure that the iron core does not shake due to the pressure during injection molding, and avoid the problems that the size of the molded coil frame is not controllable, or the winding window cannot be filled with the coil frame. Most preferably, the step surface of the positioning step 4 is parallel to the magnetic pole surface 21, so that when the coil former is injection-molded, the positioning step 4 and the magnetic pole surface 2 can be simultaneously positioned to achieve the most stable positioning effect.

As shown in fig. 4, the positioning step 4 is configured in the present embodiment to: the positioning step 4 is arranged in a bending deformation area close to the bending angle axes of the central section 1 and the magnetic pole section 2, and before the central section 1 and the magnetic pole section 2 are bent for 90 degrees, the step surface of the positioning step 4 is a slope-shaped inclined plane which is intersected with the magnetic pole surface 21, so that a trapezoid groove with an outward flaring is formed on the central section 1 by the two step surfaces. This dovetail groove of outside flaring can be convenient for central authorities section 1 when the punching press is pounded flat processing, when the punching press, can guarantee that the mould mold insert can not take up the area material when pushing out, slows down the wearing and tearing of mold insert and area material, promotes the life of mold insert. The principle of the angle change of the step surface of the positioning step 4 before and after bending is shown in fig. 6 (a) and 6 (b), and in the bending process, because the distance between the inner end and the outer end of the step surface is different from the bending radius of the magnetic pole surface 21 (r 2 and r1 respectively, and r2 is less than r 1), and after the step surface rotates by the same angle, the circumference of the step surface where the inner end and the outer end pass is also different, the angle between the step surface and the horizontal plane can be changed from beta to 0 deg.

As shown in fig. 3, the width of the end of the pole segment 2 is greater than the width of the central segment 1, thereby forming a wider segment and a narrower segment on the core, and the wider segment and the narrower segment are transited by a transition plane 5, and the transition plane 5 is a slope-shaped inclined plane. The transition plane 5 is formed by cutting off materials of the iron core in the width direction by adopting a punching process, and the transition plane 5 is set into a slope plane in a slope shape so as to carry out width transition and reduce the processing difficulty; in this embodiment, the transition plane 5 is symmetrically provided on each of the two sides of the width direction of each magnetic pole section 2, and the whole iron core is symmetrical in structure including the transition plane 5, so as to ensure that the iron core can be located at the center of the coil frame during injection molding. In the present embodiment, the transition plane 5 is disposed at the middle position of the pole segments 2, that is, when the iron core is punched in the width direction, the punching range ends at the middle position of the two pole segments 2. The transition plane 5 is arranged at the middle position of the magnetic pole section 2 instead of the bending positions of the magnetic pole section 2 and the central section 1, so that the problem that the magnetic pole section 2 is twisted when being bent can be avoided.

The iron core of the present embodiment is preferably obtained by progressive die processing, as shown in fig. 7, the specific process thereof is as follows: firstly, processing continuous strip raw materials 100 to obtain a linear strip material; then, cutting off the linear strip material in the central section 1 and the partial magnetic pole section 2 in the width direction by adopting a punching process; then, flattening the central section 1 in the thickness direction by adopting a stamping process; and finally, bending the two magnetic pole sections 2 to finally obtain an iron core finished product and conveying and blanking the iron core finished product. The progressive die is utilized to process parts, so that the efficiency can be effectively improved, and the size precision can be ensured.

Example 2:

the embodiment provides a manufacturing method of an iron core, which adopts a progressive die processing technology and comprises the following steps:

s1, providing continuous strip-shaped raw materials, and processing the strip-shaped raw materials to obtain a linear strip-shaped material; in the embodiment, the strip-shaped raw material is punched to obtain a linear strip-shaped material;

s2, taking the length middle section of the linear strip material as a central section and sections at two ends of the central section as magnetic pole sections, and punching the central section in the width direction at least to ensure that the width dimension of the central section is smaller than the width dimension of the tail end of the magnetic pole section;

s3, at least stamping the central section in the thickness direction to enable the thickness dimension of the central section to be smaller than that of the tail end of the magnetic pole section;

and S4, bending the magnetic pole sections at the two ends by 90 degrees to obtain the finished iron core with the U-shaped structure in the embodiment 1.

Example 3:

referring to fig. 8 and 9, the present embodiment provides an electromagnetic device, which includes a core 10, a coil frame 20, and a coil (not shown in the drawings), wherein the core 10 is the core of embodiment 1, and therefore has all the technical effects of the core of embodiment 1. The bobbin 20 is integrally injection molded in this embodiment to be fixedly assembled to the core 10, and the coil is wound around the outer circumference of the central section of the core 10. In other embodiments, the core 10 and the coil frame 20 may be separately produced, and then the coil frame 20 may be fixed to the core 10 by using a fixing and connecting means, which is not limited to the integral injection molding manner provided in this embodiment. However, in this embodiment, an integral injection molding manner is adopted, and when the coil frame 20 is injection molded on the iron core 10, the positioning effect of the positioning step 4 and the magnetic pole face 2 described in embodiment 1 can ensure that the iron core 10 does not shake due to the pressure during injection molding, thereby avoiding the problems that the size of the part of the coil frame 20 after molding is not controllable, or the winding window cannot be filled with the material, and the like.

Example 4:

referring to fig. 10 and 11, the present embodiment provides a relay, which includes a contact system and a magnetic circuit system, wherein the magnetic circuit system includes the electromagnetic device according to embodiment 3, and has the technical effects of the electromagnetic device.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (12)

1. The iron core, for having the entity that is U type structure of certain thickness, include central authorities section and connect at central authorities section both ends, be two magnetic pole sections of dog-ear with central authorities section, the terminal surface of magnetic pole section is magnetic pole face, its characterized in that: the central section is thinner than the magnetic pole section so as to increase the coil winding space at the periphery of the central section.

2. The core of claim 1, wherein: the axial direction of a bevel angle of the iron core at the intersection of the central section and the two magnetic pole sections is defined as the width direction, and the size of the central section in at least one measuring direction of the width and the thickness is smaller than the size of the magnetic pole sections in the corresponding same measuring direction of the tail ends of the magnetic pole sections.

3. The core of claim 2, wherein: the dimensions of the central segment and a portion of the pole segment in at least one of the measured directions of width and thickness are each less than the dimensions of the pole segment at its ends in the corresponding same measured direction.

4. The core of claim 2, wherein: the metal density of the central section is greater than the metal density of the pole sections at their ends.

5. The core of claim 1, wherein: and a straight-line-shaped groove is formed in the inner angle of the bending part of the central section and the magnetic pole section along the direction of the bending angle axis.

6. The core of claim 5, wherein: the central section and the magnetic pole sections are formed by bending and molding a linear strip material along two linear grooves.

7. The core of claim 2, wherein: the magnetic pole section is provided with a step-down thickness change to form a positioning step.

8. The core of claim 7, wherein: the step surface of the positioning step is parallel to the magnetic pole surface.

9. The core of claim 8, wherein: the central section and the magnetic pole section are formed by bending and molding a linear material, the positioning step is arranged in a bending deformation area close to the bending angle axis of the central section and the magnetic pole section, and the positioning step is configured as follows: before the central section and the magnetic pole sections are bent, the step surface of the positioning step is a slope-shaped inclined plane, so that the two step surfaces form a trapezoid groove with an outward flaring on the central section.

10. The core of claim 2, wherein: the width of the tail end of the magnetic pole section is larger than that of the central section, so that a wider section and a narrower section are formed on the iron core, and the wider section and the narrower section are transited by a slope-shaped transition plane.

11. The core of claim 10, wherein: the transition plane is arranged at the middle section of the magnetic pole section.

12. Relay, including magnetic circuit and contact system, magnetic circuit includes electromagnetic means, electromagnetic means includes iron core, and iron core fixed mounting's coil former and the winding in the coil of iron core periphery, its characterized in that: the core is as claimed in any one of claims 1-11.

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