CN218482166U

CN218482166U - Electromagnetic relay iron core

Info

Publication number: CN218482166U
Application number: CN202222832738.7U
Authority: CN
Inventors: 张灵
Original assignee: Ningbo Gaoling Electronics Co ltd
Current assignee: Ningbo Gaoling Electronics Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-02-14
Anticipated expiration: 2032-10-26

Abstract

The utility model provides an electromagnetic relay iron core, which comprises a mandrel arranged on a coil rack of a relay in a penetrating way, wherein the upper end of the mandrel is provided with a limit baffle which is pressed against the upper end of the coil rack for limiting, and the lower end of the mandrel is provided with a connecting shaft which is used for being connected with a yoke iron positioned below the coil rack; the outer wall of the connecting shaft is provided with a plurality of ribs which extend axially and are distributed along the circumferential direction of the connecting shaft, the outer wall of the mandrel is provided with a plurality of limit convex strips which extend axially and are distributed along the circumferential direction of the mandrel, and the limit convex strips are made of flexible materials. The utility model discloses an electromagnetic relay iron core, simple structure, processing is convenient, low in manufacturing cost to can guarantee higher joint strength when it is connected to the relay yoke.

Description

Electromagnetic relay iron core

Technical Field

The utility model relates to an electromagnetic relay technical field particularly, relates to an electromagnetic relay iron core.

Background

The relay is widely applied to various industries as a basic element, and the requirement on the relay is higher and higher along with the continuous updating of equipment in various industries. Especially, the service life and overload of the relay affect the usability and reliability of the whole relay. Relays are generally composed of an iron core, a coil, an armature, a contact, a movable spring assembly, and the like. When the coil passes through the current, electromagnetic force is generated, the armature is attracted and is contacted with a pole surface at one end of the iron core, and therefore the movable contact is contacted with the fixed contact; when the current in the coil disappears, the electromagnetic force disappears, the armature resets and is separated from the pole face at one end of the iron core, and therefore the movable contact is separated from the fixed contact. The aim of switching on or off the circuit is achieved by attracting or separating the movable contact and the fixed contact.

In a conventional relay structure, an iron core is arranged in the middle of a coil rack in a penetrating manner, the upper end of the iron core is used for adsorbing a movable spring armature, and the lower end of the iron core is used for being connected with a yoke below the coil rack; in the existing structure, a thread section is arranged at the lower end of the iron core and is fixed with the yoke iron in a thread connection mode, so that the processing cost of the iron core is increased, and the iron core needs to be screwed during installation, so that the assembly efficiency is reduced; therefore, it is necessary to develop a core structure that can improve the connection strength with the yoke without complicating the assembly method.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem be: overcome at least one defect among the prior art, provide an electromagnetic relay iron core, simple structure, processing is convenient, low in manufacturing cost to can guarantee higher joint strength when it is connected to the relay yoke.

In order to solve the above problems, the present invention provides an electromagnetic relay core, which includes a mandrel inserted into a coil rack of a relay, a limit baffle abutting against the upper end of the coil rack for limiting is disposed at the upper end of the mandrel, and a connecting shaft for connecting with a yoke located below the coil rack is disposed at the lower end of the mandrel; the shaping has a plurality of axial extensions and prolongs the protruding muscle that its circumference distributes on the outer wall of connecting axle, be provided with a plurality of axial extensions on the outer wall of dabber and prolong the spacing sand grip that its circumference distributes, just spacing sand grip makes for flexible material.

Compared with the prior art, the utility model, useful part lies in:

in the iron core structure of the utility model, the plurality of convex ribs are arranged on the outer wall of the connecting shaft at the lower end of the iron core structure, when the iron core structure is assembled with the yoke in a pressing way, the convex rib part is easy to deform, so that the outer diameter of the connecting shaft in the structure is properly increased compared with the outer diameter of the optical axis, and when the iron core structure is installed, the convex rib part is extruded and deformed and then filled in a gap between the outer wall of the connecting shaft and the inner wall of the assembling hole, so that the adhesive force between two parts is effectively increased, and the connecting strength is improved; in addition, the convex rib part is directly formed by upsetting on the outer wall of the connecting shaft by a cold heading process, so that the connecting shaft is efficient and convenient; on the other hand, the outer wall of the mandrel in the iron core structure of the utility model is also provided with a limit convex strip, so that the mandrel can be better limited when being assembled with the mounting hole of the coil frame, thereby realizing the circumferential rotation-proof effect and improving the stability of the iron core connecting structure from another angle; and the spacing sand grip in this structure adopts flexible material, extrudees the volatility, so when it is connected with coil former mounting hole cartridge, also more convenient to frictional resistance between the cartridge structure contact surface is big, and connection structure stability is high.

Preferably, the limiting convex strip is made of plastic, and the limiting convex strip and the mandrel are in an injection molding integrated structure. In the structure, the limiting convex strips are formed by injection molding of plastic materials, and are directly injection molded on the outer wall of the mandrel, so that the processing is convenient, the processing is simpler and more convenient compared with the processing of corresponding convex strip structures on the outer wall of the mandrel, the processing difficulty is reduced, and the processing efficiency is improved.

As an improvement, the outer wall of the mandrel is provided with a plurality of accommodating grooves which axially extend and are circumferentially distributed along the mandrel, a plurality of limiting convex strips are injection-molded in the corresponding accommodating grooves, and each limiting convex strip radially protrudes out of the outer side wall of the mandrel. Among the above-mentioned improvement structure, make spacing sand grip and dabber's the connection structure that moulds plastics more firm after the storage tank sets up, because glue the material after injection moulding and can fill to the storage tank in, treat that glue in the groove after the material cooling solidification has formed promptly with storage tank matched with lug to increase connection structure's that moulds plastics intensity.

The mandrel, the limiting baffle and the connecting shaft are of an integrated structure; and a plurality of the convex ribs are formed by directly adopting a cold heading mode. In the improved structure, the mandrel, the limiting baffle and the connecting shaft are of an integrated structure, namely three parts are processed at one time, the connection operation among the parts is not needed, the processing is convenient, and the efficiency is improved; in addition, the convex rib structure on the outer wall of the connecting shaft is also formed by direct upsetting, and the processing process is quick and efficient.

And the joint of the limiting baffle and the mandrel is provided with an annular clearance groove which is inwards concave towards one side of the limiting baffle and is cut into a ring shape. In the improved structure, the clearance groove is arranged, so that corner cleaning treatment is not needed at the joint of the limiting baffle and the mandrel in the iron core structure, the working procedures are reduced, and the processing cost is reduced; and meanwhile, interference can be avoided at right-angle positions when the iron core and the coil rack are assembled.

And the plastic gasket is formed at one end, close to the mandrel, of the limiting baffle in an injection molding mode, and a positioning bulge filled in the accommodating groove is arranged at one end, close to the limiting baffle, of the radial inner side of the plastic gasket. In the above-mentioned improvement structure, when the setting of plastic shim made the iron core install in the coil former, limit baffle's one end had corresponding elastic buffer effect with the tip of coil former to improve life.

In a further improvement, one end of each limiting convex strip close to the connecting shaft is provided with a first guide inclined plane; and a second guide inclined plane is arranged on the outer wall of one end, far away from the mandrel, of the connecting shaft. Above-mentioned improve the structure and make the iron core in the equipment process, because the guide effect on two direction inclined planes makes dabber or connecting axle can be more smooth and easy to pass the coil former installation passageway of relay or the dress hole on the yoke respectively, improve the installation convenience.

Drawings

Fig. 1 is a schematic structural diagram of an electromagnetic relay core according to the present invention;

FIG. 2 is a cross-sectional view of the electromagnetic relay core of FIG. 1;

FIG. 3 is an enlarged view of the structure at X in FIG. 2;

FIG. 4 is an enlarged view of the structure at Y in FIG. 2;

description of reference numerals:

1. a mandrel; 1.1, a containing groove; 2. a limiting baffle; 3. a connecting shaft; 3.1, convex ribs; 4. limiting convex strips; 5. an empty avoiding groove; 6. a plastic gasket; 6.1, positioning a bulge; 7. a first guide slope; 8. a second guide slope.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it should be noted that the terms "upper end", "lower end", "outer wall", "radially inner side", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

As shown in fig. 1, the present invention provides an electromagnetic relay core, which includes a cylindrical core shaft 1, wherein the core shaft 1 is used for being inserted and fitted in a mounting hole of a coil rack when being applied to a relay, in addition, a limit baffle 2 abutting against the upper end of the coil rack for limiting is arranged at the upper end of the core shaft 1, and a connecting shaft 3 for connecting with a yoke below the coil rack is arranged at the lower end of the core shaft 1; on the other hand, a plurality of convex ribs 3.1 which axially extend and are distributed along the circumferential direction of the connecting shaft 3 are formed on the outer wall of the connecting shaft 3, specifically, corresponding assembling holes are formed in the yoke, the connecting shaft 3 is connected to the assembling holes in a press-fitting and tight-fitting mode, in the embodiment, the corresponding convex ribs 3.1 which are added on the outer wall of the connecting shaft 3 enable the connecting shaft 3 to have higher connecting strength when being matched with the assembling holes in a press-fitting mode, and because the convex ribs 3.1 are easier to deform in the press-fitting process, the outer diameter of the connecting shaft 3 in the structure is properly increased compared with the outer diameter of an optical axis, when the connecting shaft is installed, the convex ribs 3.1 are filled in gaps between the outer wall of the connecting shaft 3 and the inner wall of the assembling holes after being extruded and deformed, and the adhesive force between the two parts is effectively increased; more specifically, in order to facilitate processing in this embodiment, the portion 3.1 of the rib is directly formed by upsetting on the outer wall of the connecting shaft 3 through a cold heading process, and is efficient and convenient.

In addition, in this embodiment, a plurality of axially extending limiting convex strips 4 distributed along the circumferential direction of the mandrel 1 are arranged on the outer wall of the mandrel, and the limiting convex strips 4 are made of a flexible material. In the structure, the limiting convex strips 4 are additionally arranged on the outer wall of the mandrel 1, so that the mandrel 1 is better limited when being assembled with the mounting hole of the coil frame, and the circumferential anti-rotation effect is realized; specifically, corresponding strip-shaped limiting channels can be simultaneously formed in the inner wall of the coil former mounting hole in the structure, so that the limiting convex strips 4 are assembled in the limiting channels when the mandrel 1 is inserted into the mounting hole; in this embodiment, the limiting convex strips 4 are preferably made of plastic, and because the plastic has better elastic deformation capability, interference fit is adopted when the mandrel 1 and the coil rack are assembled, the limiting convex strips 4 made of plastic are extruded and deformed in the insertion fit process and then are tightly attached to the inner wall of the mounting hole, and because the structure is not formed by completely wrapping the plastic on the outer wall of the mandrel 1, but by arranging a plurality of strip-shaped limiting convex strips 4 at intervals, the friction resistance is not too much during insertion, the installation is convenient, and the stability of the connection structure is improved.

More importantly, in this embodiment, the direct injection moulding of mode that spacing sand grip 4 was moulded plastics through the secondary is on the outer wall of dabber 1, and processing is convenient, need not go on and outer two parts connect the process, raise the efficiency. On the other hand, as shown in fig. 2 and 3, a plurality of axially extending accommodating grooves 1.1 distributed along the circumferential direction are formed on the outer wall of the mandrel 1, a plurality of limiting convex strips 4 are injection molded in the corresponding accommodating grooves 1.1, and the limiting convex strips 4 radially protrude from the outer side wall of the mandrel 1. After setting up like this, spacing sand grip 4 can directly be joined in marriage the equipment spacing in storage tank 1.1 in the radial inside part of shaping solidification back, increases area of contact, improves the joint strength between two parts, avoids spacing sand grip 4 to break away from dabber 1 outer wall.

In addition, in order to further facilitate the processing, the mandrel 1, the limiting baffle 2 and the connecting shaft 3 are of an integrated structure and are processed at one time in a cold heading mode; and in the whole upsetting process, the convex ribs 3.1 are synchronously formed on the outer wall of the connecting shaft 3 part, so that the processing procedure is further simplified, and the processing efficiency is effectively improved.

As shown in fig. 2, a clearance groove 5 which is concavely cut into a ring shape towards one side of the limit baffle 2 is arranged at the joint of the limit baffle 2 and the mandrel 1, so that when the iron core is assembled with the coil frame, the end position of the mounting hole at the upper end of the coil frame can not interfere at the joint of the limit baffle 2 and the mandrel 1; meanwhile, after the arrangement, back chipping treatment is not needed at the corresponding right-angle root of the iron core. As shown in fig. 2 and 4, more specifically, a plastic gasket 6 is injection molded at an end of the limit baffle 2 close to the mandrel 1, and a positioning protrusion 6.1 filled in the accommodating groove 1.1 is disposed at an end of the plastic gasket 6 radially inward and close to the limit baffle 2.

In addition, in the structure, one end of each limit convex strip 4 close to the connecting shaft 3 is provided with a first guide inclined plane 7; the outer wall of the connecting shaft 3 far away from one end of the mandrel 1 is provided with a second guide inclined plane. 8 make the iron core in the assembling process, because the guiding action on two direction inclined planes makes dabber 1 or connecting axle 3 can be more smooth and easy to pass the coil former installation passageway of relay or the dress hole on the yoke respectively, improve the installation convenience.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure, and such changes and modifications will fall within the scope of the present invention.

Claims

1. An electromagnetic relay iron core comprises a mandrel (1) penetrating through a coil rack of a relay, wherein a limiting baffle (2) abutting against the upper end of the coil rack for limiting is arranged at the upper end of the mandrel (1), and a connecting shaft (3) used for being connected with a yoke iron positioned below the coil rack is arranged at the lower end of the mandrel (1); the method is characterized in that: the shaping has a plurality of axial extensions and extends convex rib (3.1) that its circumference distributes on the outer wall of connecting axle (3), be provided with a plurality of axial extensions and extend spacing sand grip (4) that its circumference distributes on the outer wall of dabber (1), just spacing sand grip (4) are made for flexible material.

2. An electromagnetic relay core according to claim 1, characterized in that: the limiting convex strip (4) is made of plastic, and the limiting convex strip (4) and the mandrel (1) are in an injection molding integrated structure.

3. An electromagnetic relay core according to claim 2, characterized in that: offer on the outer wall of dabber (1) a plurality of axial extensions and extend storage tank (1.1) that its circumference distributes, it is a plurality of spacing sand grip (4) injection moulding is in storage tank (1.1) that each corresponds, and each spacing sand grip (4) along radial evagination in the lateral wall of dabber (1).

4. An electromagnetic relay core according to claim 3, characterized in that: the mandrel (1), the limiting baffle (2) and the connecting shaft (3) are of an integrated structure; and a plurality of the convex ribs (3.1) are formed by directly adopting a cold heading mode.

5. An electromagnetic relay core according to claim 4, characterized in that: the joint of the limiting baffle (2) and the mandrel (1) is provided with an annular clearance groove (5) which is inwards concave towards one side of the limiting baffle (2).

6. An electromagnetic relay core according to claim 5, characterized in that: the limiting baffle (2) is close to the plastic gasket (6) formed at one end of the mandrel (1) in an injection molding mode, the radial inner side of the plastic gasket (6) is close to one end of the limiting baffle (2), and the positioning protrusion (6.1) filled in the containing groove (1.1) is arranged at one end of the limiting baffle (2).

7. An electromagnetic relay core according to claim 1, characterized in that: one end of each limiting convex strip (4) close to the connecting shaft (3) is provided with a first guide inclined plane (7); and a second guide inclined plane (8) is arranged on the outer wall of one end, far away from the mandrel (1), of the connecting shaft (3).