Electromagnet

Abstract

The utility model provides an electromagnet, which comprises a coil framework, a coil, an electromagnet, an electromagnet core and an electromagnet core, the magnet yoke is arranged on the outer side of the coil framework; the iron core structure comprises a static iron core fixed to one end of the coil framework and a movable iron core assembly moving relative to the static iron core, the movable iron core assembly comprises a movable iron core and a connecting rod connected with the movable iron core, the movable iron core comprises an iron core body, an annular flange and a connecting part, the annular flange and the connecting part are arranged at the two ends of the iron core body respectively, and the annular flange extends out of the coil framework. Compared with the mode that a clamping ring needs to be additionally arranged to limit the spring in the prior art, the structure is simpler; an inserting groove is formed in the connecting part, one end of the connecting rod extends out of the coil framework from the static iron core, an inserting rod inserted into the inserting groove is formed at the other end of the connecting rod, a plurality of anti-retreating barbs connected with the inner wall of the inserting groove in an abutting mode are formed on the outer wall of the inserting rod, and due to the fact that the anti-retreating barbs and the connecting rod can be formed through one-time punch forming, machining is faster and more convenient, and production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnets, and particularly relates to an electromagnet. Background Art

[0002] An electromagnet is a device that generates electromagnetic force when powered on. Existing electromagnets include a housing, a coil, a moving iron core, a static iron core, a spring, and a snap ring. The snap ring is fixed to the end of the moving iron core extending out of the housing. One end of the spring abuts against the snap ring, and the other end abuts against the outer wall of the housing. In this way, there are more components and the installation is rather cumbersome, increasing the production cost. Content of the Utility Model

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the existing electromagnet, such as having a large number of components, cumbersome installation, and high production cost, so as to provide an electromagnet with low production cost.

[0004] To this end, the utility model provides an electromagnet, which includes a coil bobbin, a yoke, an iron core structure, and a compression spring. A coil is wound around the outer wall of the coil bobbin; the yoke is arranged outside the coil bobbin; the iron core structure includes a static iron core fixed to one end of the coil bobbin, and a moving iron core assembly that moves relative to the static iron core. The moving iron core assembly includes a moving iron core and a connecting rod connected to the moving iron core. The moving iron core includes an iron core body, and an annular flange and a connecting portion respectively arranged at both ends of the iron core body. The annular flange extends out of the coil bobbin and is integrally formed with the iron core body. The connecting portion is formed with a slot. One end of the connecting rod extends out of the static iron core to the outside of the coil bobbin, and the other end is formed with a plug rod inserted into the slot. A plurality of anti-retreat barbs that abut against the inner wall of the slot are formed on the outer wall of the plug rod; the compression spring, one end of which abuts against the annular flange, and the other end abuts against the outer wall of the yoke.

[0005] The size of the compression spring gradually becomes larger from the end adjacent to the annular flange towards the other end.

[0006] A limiting sleeve is arranged at the end of the coil bobbin extending out of the yoke. The limiting sleeve includes a baffle plate that abuts against the outer wall of the yoke, and a surrounding plate around the baffle plate. The baffle plate abuts against the compression spring, and the surrounding plate abuts against the edge of the compression spring.

[0007] A chamfer is provided at the front end of the plug rod.

[0008] The yoke includes a U-shaped yoke body and a sealing plate arranged at the opening of the U-shaped yoke body. Positioning blocks are arranged on both sides of the sealing plate, and positioning grooves adapted to the positioning blocks are formed on two relatively arranged yoke plates of the U-shaped yoke body.

[0009] On both sides of one of the yoke plates, mounting plates extending outward are formed, and the mounting plates are formed with mounting holes.

[0010] The technical solution of the present utility model has the following advantages:

[0011] 1. For the electromagnet provided by the present utility model, the moving iron core includes an iron core main body, and an annular flange and a connecting portion respectively arranged at both ends of the iron core main body. The annular flange extends out of the coil bobbin and is integrally formed with the iron core main body. The annular flange is used to limit the position of the compression spring. Compared with the prior art that requires an additional snap ring to limit the spring, this structure is simpler. In addition, the connecting portion is formed with a slot. One end of the connecting rod extends out of the static iron core to the outside of the coil bobbin, and the other end is formed with a plug rod inserted into the slot. The outer wall of the plug rod is formed with a plurality of anti-retreat barbs that abut against the inner wall of the slot. The anti-retreat barbs can make the assembly of the connecting rod and the moving iron core more firm. In addition, since the anti-retreat barbs and the connecting rod can be formed in one step by cold heading process, the processing is more rapid and convenient, reducing the production cost.

[0012] 2. For the electromagnet provided by the present utility model, a limiting sleeve is arranged at one end of the coil bobbin extending out of the yoke. The limiting sleeve includes a baffle plate abutting against the outer wall of the yoke and a surrounding plate around the baffle plate. The baffle plate abuts against the compression spring, and the surrounding plate abuts against the edge of the compression spring. The limiting sleeve can prevent the compression spring from directly contacting the yoke, thus better protecting the yoke.

[0013] 3. For the electromagnet provided by the present utility model, mounting plates extending outward are formed on both sides of one of the yoke plates, and the mounting plates are formed with mounting holes. This structure is simpler and convenient for fixing the yoke. Description of the Drawings

[0014] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 Is a perspective view of the electromagnet of the present utility model;

[0016] Figure 2 Is a sectional view of the electromagnet;

[0017] Figure 3 Is Figure 2 An enlarged structural schematic diagram of part A in

[0018] Figure 4 Is an exploded structural schematic diagram of the electromagnet.

[0019] Description of the reference numerals: 1, coil bobbin; 2, yoke; 4, static iron core; 5, moving iron core; 6, connecting rod; 7, iron core body; 8, annular flange; 9, connecting portion; 10, slot; 11, plug rod; 12, anti-retreat barb; 13, compression spring; 14, limit sleeve; 15, baffle; 16, enclosing plate; 17, U-shaped yoke body; 18, sealing plate; 19, positioning block; 20, yoke plate; 21, positioning groove; 22, mounting plate; 23, mounting hole. Detailed implementation manners

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, and does 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 therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0024] Embodiment

[0025] This embodiment provides an electromagnet, as Figure 1 shown, including a coil bobbin 1, a yoke 2, an iron core structure, a compression spring 13, and a limit sleeve 14.

[0026] The coil bobbin 1 has a coil (not shown in the figure) wound around its outer wall.

[0027] A yoke 2 is disposed outside the coil bobbin 1, as Figure 2 and Figure 4 shown. The yoke 2 includes a U-shaped yoke body 17 and a sealing plate 18 disposed at the opening of the U-shaped yoke body 17. Positioning blocks 19 are provided on both sides of the sealing plate 18, and positioning grooves 21 adapted to the positioning blocks 19 are formed on two oppositely disposed yoke plates 20 of the U-shaped yoke body 17. Mounting plates 22 extending outward are formed on both sides of one of the yoke plates 20, and mounting holes 23 are formed in the mounting plates 22.

[0028] An iron core structure includes a stationary iron core 4 fixed to one end of the coil bobbin 1 and a moving iron core assembly movable relative to the stationary iron core 4, as Figure 2 and Figure 3 shown. The moving iron core assembly includes a moving iron core 5 and a connecting rod 6 connected to the moving iron core 5. The moving iron core 5 includes an iron core main body 7, and an annular flange 8 and a connecting portion 9 respectively provided at both ends of the iron core main body 7. The annular flange 8 extends out of the coil bobbin 1 and is integrally formed with the iron core main body 7. A slot 10 is formed in the connecting portion 9. One end of the connecting rod 6 extends out of the stationary iron core 4 to the outside of the coil bobbin 1, and the other end is formed with a plug rod 11 inserted into the slot 10. A plurality of anti-retreat barbs 12 abutting against the inner wall of the slot 10 are formed on the outer wall of the plug rod 11, and a chamfer is provided at the front end of the plug rod 11.

[0029] A compression spring 13 abuts against the annular flange 8 at one end and abuts against the outer wall of the yoke 2 at the other end. The size of the compression spring 13 gradually increases from the end adjacent to the annular flange 8 to the end adjacent to the yoke 2.

[0030] A limit sleeve 14 is disposed at one end of the coil bobbin 1 extending out of the yoke 2, as Figure 2 shown. The limit sleeve 14 includes a baffle 15 abutting against the outer wall of the yoke 2 and a surrounding plate 16 surrounding the baffle 15. The baffle 15 abuts against the compression spring 13, and the surrounding plate 16 abuts against the edge of the compression spring 13.

[0031] The electromagnet provided by the utility model, the moving iron core 5 includes an iron core main body 7, and an annular flange 8 and a connecting portion 9 respectively arranged at both ends of the iron core main body 7. The annular flange 8 extends out of the coil bobbin 1 and is integrally formed with the iron core main body 7. The annular flange 8 is used to limit the position of the compression spring 13. Compared with the prior art that requires an additional snap ring to limit the spring, such a structure is simpler and the production cost is low. In addition, a slot 10 is formed in the connecting portion 9. One end of the connecting rod 6 extends out of the static iron core 4 to the outside of the coil bobbin 2, and the other end is formed with a plug rod 11 inserted into the slot 10. A plurality of anti-retreat barbs 12 that are in contact with the inner wall of the slot 10 are formed on the outer wall of the plug rod 11. The anti-retreat barbs 12 can make the assembly of the connecting rod 6 and the moving iron core 5 more firm. In addition, since the anti-retreat barbs and the connecting rod can be formed in one step by the cold heading process, the processing is more rapid and convenient, reducing the production cost.

[0032] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the creation of the utility model.

Claims

1. An electromagnet, characterized in that: include: A coil frame (1), the outer wall of which is wound with a coil; A magnetic yoke (2) is arranged outside the coil frame (1); An iron core structure, comprising a static iron core (4) fixed to one end of the coil frame (1), and a moving iron core assembly movable relative to the static iron core (4), the moving iron core assembly comprising a moving iron core (5) and a connecting rod (6) connected to the moving iron core (5), the moving iron core (5) comprising an iron core body (7), and an annular flange (8) and a connecting portion (9) respectively arranged at both ends of the iron core body (7), the annular flange (8) extending out of the coil frame (1) and being integrally formed with the iron core body (7), the connecting portion (9) being formed with a slot (10), one end of the connecting rod (6) extending from the static iron core (4) to the outside of the coil frame (1), and the other end being formed with an insert rod (11) inserted into the slot (10), the outer wall of the insert rod (11) being formed with a plurality of anti-retraction barbs (12) abutting against the inner wall of the slot (10); A compression spring (13) has one end abutting against the annular flange (8) and the other end abutting against the outer wall of the yoke (2).

2. The electromagnet according to claim 1, characterized in that The size of the compression spring (13) gradually increases from one end adjacent to the annular flange (8) toward the other end.

3. The electromagnet according to claim 1, characterized in that A limiting sleeve (14) is provided at one end of the coil frame (1) extending out of the yoke (2); the limiting sleeve (14) comprises a baffle (15) abutting against the outer wall of the yoke (2), and a surrounding plate (16) surrounding the baffle (15); the baffle (15) abuts against the compression spring (13), and the surrounding plate (16) abuts against the edge of the compression spring (13).

4. The electromagnet according to claim 1, characterized in that The front end of the insertion rod (11) is provided with a chamfer.

5. The electromagnet according to claim 1, characterized in that The magnetic yoke (2) comprises a U-shaped magnetic yoke body (17) and a sealing plate (18) arranged at an opening of the U-shaped magnetic yoke body (17), positioning blocks (19) being arranged on both sides of the sealing plate (18), and positioning grooves (21) adapted to the positioning blocks (19) being formed on two oppositely arranged magnetic yoke plates (20) of the U-shaped magnetic yoke body (17).

6. The electromagnet according to claim 5, characterized in that One of the yoke plates (20) is formed with mounting plates (22) extending outward on both sides, and the mounting plate (22) is formed with mounting holes (23).

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