CN219958809U - Electromagnetic system and switching device - Google Patents

Abstract

Electromagnetic system and switching device, switching device includes electromagnetic system, electromagnetic system includes quiet iron core, moves iron core and coil, move the iron core and include connecting portion and insert the portion, insert the portion and be used for inserting in the coil, it includes two counter-force springs, be equipped with two drive division that are connected with two counter-force springs respectively on the connecting portion, two drive division set up respectively move the both ends that the iron core is close to quiet iron core one side, two counter-force springs parallel interval sets are located between iron core and the quiet iron core, coil and quiet iron core are used for driving respectively to move the iron core and overcome the effort of two counter-force springs removes, through moving iron core and two counter-force spring connection, can balance the atress condition of moving the iron core, avoid moving the iron core and remove the skew and the problem of jamming in-process, and then improve electromagnetic system motion's stability, but also can slow down the fatigue problem of spring, lengthen electromagnetic system's life.

Description

Electromagnetic system and switching device

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to an electromagnetic system and a switching device.

Background

As the market for electric vehicles has further expanded, the demand for dc switches has further increased, and thus, there is a need to develop an electromagnetic system for dc switches.

However, in the conventional electromagnetic system for a dc switch, the distribution of the reaction force spring is uneven, which results in poor motion stability of the electromagnetic system, and thus it is difficult to satisfy the use requirement.

Disclosure of Invention

The object of the present utility model is to overcome at least one of the drawbacks of the prior art and to provide an electromagnetic system and a switching device.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an electromagnetic system, includes quiet iron core, moves iron core and coil, move the iron core and include connecting portion and insert the portion, insert the portion and be used for inserting in the coil, it includes two reaction springs, be equipped with two drive division that are connected with two reaction springs respectively on the connecting portion, two drive division set up respectively move the both ends that the iron core is close to quiet iron core one side, two reaction spring parallel interval settings are located between moving iron core and the quiet iron core, coil and quiet iron core are used for the drive to move the iron core respectively overcome the effort of two reaction springs removes.

Preferably, the electromagnetic system comprises a coil, the static iron core comprises a U-shaped structure, the coil is arranged in the U-shaped structure of the static iron core, two counter-force springs are oppositely arranged on two sides of the static iron core, an inserting part of the movable iron core is connected with the middle part of a connecting part, and two ends of the connecting part respectively extend to two sides of the static iron core and are provided with driving parts connected with the counter-force springs.

Preferably, the driving part is provided with a limiting part, the limiting part comprises a mounting part and a limiting part, the mounting part is used for being in limiting fit with the connecting part, and the limiting part is used for being in limiting fit with the counter-force spring.

Preferably, the mounting part is of a U-shaped structure, and the mounting part of the U-shaped structure is used for being clamped on the driving part for limiting and matching; the driving part is provided with a limiting groove, and the mounting part is provided with a limiting strip which is inserted into the limiting groove and is in limiting fit; the spacing portion is the cylindric structure, the one end of reaction spring is arranged in inserting spacing cooperation in the spacing portion.

Preferably, the electromagnetic system comprises two coils, the movable iron core is provided with two insertion parts, the two insertion parts are respectively connected with the two driving parts, the two insertion parts are respectively inserted into the two coils, and the two counter-force springs are respectively sleeved on the two insertion parts.

Preferably, the movable iron core is provided with an extension structure, the extension structure is positioned between the two insertion parts, the extension structure comprises a first extension part and a second extension part, the first extension part is arranged on the side surface of the movable iron core, which is close to the static iron core, and the second extension part is arranged on the side surface of the first extension part; the static iron core is provided with a third extension part, and an extension surface opposite to the second extension part is arranged on the third extension part.

Preferably, the static iron core comprises a static iron core bottom plate, coil mounting parts for mounting coils are arranged at two ends of the static iron core bottom plate on one side close to the movable iron core, and static iron core columns are convexly arranged at one side close to the movable iron core in the middle of the static iron core bottom plate; the movable iron core is provided with two extending structures arranged at intervals, the end part of the static iron core column can be inserted between the first extending parts of the two extending structures, and the protrusions on two sides of the static iron core column are provided with third extending parts which are opposite to the second extending parts of the two extending structures respectively.

Preferably, a slot is provided in the insertion portion of the movable core.

Preferably, the static iron core and the movable iron core are of a silicon steel sheet overlapped riveting structure and comprise a plurality of silicon steel sheets which are arranged in a laminated mode.

According to the electromagnetic system disclosed by the utility model, the movable iron core is connected with the two counter-force springs, so that the stress condition of the movable iron core can be balanced, the problems of deflection and clamping stagnation in the moving process of the movable iron core are avoided, the movement stability of the electromagnetic system is further improved, the fatigue problem of the counter-force springs can be relieved, and the service life of the electromagnetic system is prolonged.

In addition, the installation department of U type structure can press from both sides spacing cooperation on connecting portion, has simple structure and convenient assembling's characteristics.

In addition, be equipped with extending structure on the movable iron core, first extension is used for making movable iron core be close at the distance of open-phase time, reduces the magnetic resistance of magnetic circuit to increase electromagnetic attraction, second extension is used for increasing initial magnet and switches on sectional area, thereby increase electromagnetic attraction.

In addition, be equipped with the fluting on moving the insert portion of iron core, the fluting is used for reducing the inductance of coil, lightens and moves the iron core quality, accelerates the movement speed of iron core.

The utility model also provides a switch device, which comprises an electromagnetic unit and at least one contact unit, wherein the electromagnetic unit comprises an electromagnetic unit shell and the electromagnetic system arranged in the electromagnetic unit shell, the contact unit comprises a contact unit shell, a fixed contact and a moving contact which are arranged in the contact unit shell, a first linkage hole is formed in the side wall of the contact unit shell, a second linkage hole is correspondingly formed in the side wall, close to the contact unit shell, of the electromagnetic unit shell, and a linkage rod penetrates through the first linkage hole and the second linkage hole to connect the moving iron core with the moving contact.

The switch device adopts a modularized design and comprises the electromagnetic unit and the contact units, wherein the electromagnetic unit adopts the electromagnetic system of the utility model, so that the switch device is convenient to assemble and replace, and the electromagnetic system moves more stably, so that the plurality of contact units are convenient to drive.

Drawings

FIG. 1 is a schematic diagram of a single coil electromagnetic system of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1 of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 1 in accordance with the present utility model;

FIG. 4 is a schematic diagram of the structure of the dual coil electromagnetic system of the present utility model;

FIG. 5 is a cross-sectional view of FIG. 4 of the present utility model;

FIG. 6 is a schematic structural view of a bracket of a coil;

fig. 7 is a schematic diagram of an embodiment of a switching device.

1. A stationary core; 2. a movable iron core; 3. a coil; 20. a driving section; 21. a connection part; 22. an insertion section; 4. a reaction force spring; 31. a bracket; 32. enamelled wires; 5. a limiting piece; 51. a mounting part; 52. a limit part; 53. a limit groove; 54. a limit bar; 33. countersink; 34. a limit boss; 23. a first extension; 24. a second extension; 25. a third extension; 220. slotting;

Detailed Description

Specific embodiments of the electromagnetic system of the present utility model are further described below with reference to the examples shown in the drawings. The electromagnetic system of the present utility model is not limited to the description of the embodiments below.

As shown in fig. 1, the electromagnetic system of the utility model comprises a static iron core 1, a movable iron core 2 and a coil 3, wherein the movable iron core 2 comprises a connecting part 21 and an inserting part 22, the inserting part 22 is used for being inserted into the coil 3 and comprises two counter-force springs 4, two driving parts 20 respectively connected with the two counter-force springs 4 are arranged on the connecting part 21, the two driving parts 20 are mutually far away and respectively arranged at two ends of one side, close to the static iron core 1, of the movable iron core 2, the two counter-force springs 4 are arranged between the movable iron core 2 and the static iron core 1 at parallel intervals, and the coil 3 and the static iron core 1 are respectively used for driving the movable iron core 2 to move against the acting force of the two counter-force springs 4. The coil 3 is used for enabling the static iron core 1 and the movable iron core 2 to generate a magnetic field, the movable iron core 2 is driven by the static iron core 1 to overcome the acting force of the two counter springs 4 to move, the movable iron core 2 is connected with a movable contact of the switch through the connecting part 21, and the movement of the movable iron core 2 can be used for driving the movable contact of the switch to move.

According to the electromagnetic system disclosed by the utility model, the movable iron core 2 is connected with the two counter-force springs 4, so that the stress condition of the movable iron core 2 can be balanced, the problems of deflection and clamping stagnation in the moving process of the movable iron core 2 are avoided, the movement stability of the electromagnetic system is further improved, the fatigue problem of the counter-force springs 4 can be relieved, and the service life of the electromagnetic system is prolonged.

As shown in fig. 1-2, in the first embodiment, the connecting portion 21 is provided with an insertion portion 22 for being inserted into the coil 3, the insertion portion 22 of the moving core 2 is connected to a middle portion of one side of the connecting portion 21, and the two reaction springs 4 are disposed on two opposite sides of the insertion portion 22. Specifically, the electromagnetic system includes a coil 3, quiet iron core 1 includes U type structure, coil 3 sets up in quiet iron core 1's U type structure, two counter-force springs 4 set up in quiet iron core 1's both sides relatively, and the both ends of connecting portion 21 stretch to quiet iron core 1's both sides respectively and are equipped with drive portion 20, and two drive portions 20 are connected with two counter-force springs 4, the one end that drive portion 20 was kept away from to two counter-force springs 4 is connected with bearing structure respectively, coil 3 is including setting up at quiet iron core 1 inboard support 31 to and the enameled wire 32 in the support 31 outside, support 31 is hollow structure, insert portion 22 of moving iron core 2 to support 31 inboard, set up in quiet iron core 1's both sides relatively through counter-force spring 4, can not increase electromagnetic system's height, can also reduce the distance between moving iron core 2 and quiet iron core 1. The U-shaped structure of the static iron core 1 is provided with a pressing rib with an opening, and the end part of one end of the opening is bent inwards to be provided with a limit coil 3. The two reaction springs 4 are compression springs, and the compression direction of the two reaction springs 4 is parallel to the moving direction of the movable iron core 2.

As shown in fig. 2-3, two ends of the connecting portion 21 are respectively provided with a limiting member 5, the limiting members 5 include a mounting portion 51 and a limiting portion 52, the mounting portion 51 is used for being in limiting fit with the connecting portion 21, and the limiting portion 52 is used for being in limiting fit with the reaction spring 4. The installation department 51 of this embodiment is U type structure, and the installation department 51 of U type structure is used for pressing from both sides spacing cooperation on connecting portion 21, be equipped with spacing groove 53 on the connecting portion 21, the installation department 51 is equipped with inserts spacing complex spacing strip 54 in the spacing groove 53, spacing portion 52 is the cylindric structure, the one end of reaction spring 4 is arranged in inserting spacing portion 52 spacing cooperation, and the one end that reaction spring 4 kept away from spacing portion 52 is used for being connected with bearing structure, and bearing structure can be electromagnetic system's casing, also can be the switch electrical apparatus casing that is equipped with electromagnetic system, does not do specifically limit here. The mounting portion 51 of the U-shaped structure in this embodiment can be clamped on the connecting portion 21 for limiting and matching, and has the characteristics of simple structure and convenient assembly.

As in the second embodiment shown in fig. 4-6, the two drive parts 20 are each provided with an insertion part 22 for insertion into the coil 3, and the two reaction springs 4 are each provided over the insertion part 22 of the respective connected drive part 20. Specifically, the electromagnetic system includes two coils 3, the movable iron core 2 is provided with two insertion portions 22, the two insertion portions 22 are respectively connected with the two driving portions 20, so that the movable iron core 2 is approximately in a U-shaped structure, the two insertion portions 22 are respectively inserted into the two coils 3, the two reaction springs 4 are respectively sleeved on the two insertion portions 22, one ends of the two reaction springs 4 are respectively abutted on the driving portions 20, one ends of the two reaction springs 4, which are far away from the driving portions 20, are respectively abutted on supports 31 of the two coils 3, counter bores 33 for limiting the reaction springs 4 are arranged on the supports 31, and limiting bosses 34 for limiting the reaction springs 4 are arranged on the connecting portions 21.

As shown in fig. 4-5, the movable iron core 2 is provided with an extension structure, the extension structure is located between two insertion parts 22, the extension structure includes a first extension part 23 and a second extension part 24, the first extension part 23 is disposed on a side surface of the movable iron core 2, which is close to the static iron core 1, the second extension part 24 is disposed on a side surface of the first extension part 23, the first extension part 23 is used for enabling the movable iron core and the static iron core to be relatively close in an open state, reducing the magnetic resistance of a magnetic circuit, thereby increasing the electromagnetic attraction force, and the second extension part 24 is used for increasing the conduction cross section area of the initial magnet, thereby increasing the electromagnetic attraction force.

Further, the stationary core 1 is provided with a third extension portion 25, and an extension surface provided opposite to the second extension portion 24 is provided on the third extension portion 25. When the distance between the movable iron core 2 and the static iron core 1 is larger, larger electromagnetic attraction force can be generated between the movable iron core and the static iron core.

Specifically, the stationary core 1 includes a stationary core base plate, coil mounting portions for mounting the coils 3 are provided at both ends of the stationary core base plate on a side close to the movable core 2, the coil mounting portions can be inserted into the brackets 31, and a stationary core column is provided at a side of the stationary core base plate on a side close to the movable core 2 in a protruding manner. The movable iron core 2 is provided with two extending structures arranged at intervals, the end part of the static iron core column can be inserted between the first extending parts 23 of the two extending structures, and the two sides of the static iron core column are convexly provided with third extending parts 25 which are respectively opposite to the second extending parts 24 of the two extending structures.

As shown in fig. 2 and 5, the insertion portion 22 of the movable iron core 2 is provided with a slot 220, and the slot 220 is used for reducing the inductance of the coil 3, reducing the mass of the movable iron core 2 and accelerating the movement speed of the iron core.

As shown in fig. 1 and 4, the movable iron core 2 is a silicon steel sheet stacked-riveted structure, and includes a plurality of silicon steel sheets which are stacked, the movable iron cores 2 of the single coil 3 and the double coil 3 can all adopt silicon steel sheets, and the silicon steel sheets have excellent magnetic properties, and can reduce coercive force, iron core loss (iron loss), magnetic aging and good processing manufacturability.

As shown in fig. 7, in an embodiment of a switching device, the switching device includes an electromagnetic unit and at least one contact unit, where the electromagnetic unit includes an electromagnetic unit housing 200, and an electromagnetic system disposed in the electromagnetic unit housing 200, and the electromagnetic system is described in the foregoing embodiment and is not repeated. The contact unit includes a contact unit housing 100, and a stationary contact and a moving contact provided in the contact unit housing 100. A first linkage hole 101 is provided in a side wall of the contact unit housing 100, a second linkage hole 201 is correspondingly provided in a side wall of the electromagnetic unit housing 200, which is in close contact with the contact unit housing 100, the linkage rod 300 passes through the first linkage hole 101 and the second linkage hole 201 to connect the moving core 2 with the moving contact, and the linkage rod 300 can move linearly up and down in the first linkage hole 101 and the second linkage hole 201 along with the moving core 2. For example, the connecting portion 21 of the moving core 2 is provided with a connecting hole, and the link lever 300 is connected to the moving contact and is inserted into the connecting hole through the first and second link holes 101 and 201 to be connected to the moving core 2.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (10)

1. An electromagnetic system comprises a static iron core (1), a movable iron core (2) and a coil (3), wherein the movable iron core (2) comprises a connecting part (21) and an inserting part (22), and the inserting part (22) is used for being inserted into the coil (3), and is characterized in that: including two reaction springs (4), be equipped with two drive division (20) that are connected with two reaction springs (4) respectively on connecting portion (21), two drive division (20) set up respectively move the both ends that iron core (2) are close to quiet iron core (1) one side, two reaction springs (4) parallel interval setting are located between moving iron core (2) and quiet iron core (1), coil (3) and quiet iron core (1) are used for the drive respectively to move iron core (2) overcome the effort of two reaction springs (4).

2. The electromagnetic system of claim 1, wherein: the electromagnetic system comprises a coil (3), the static iron core (1) comprises a U-shaped structure, the coil (3) is arranged in the U-shaped structure of the static iron core (1), two counter-force springs (4) are oppositely arranged on two sides of the static iron core (1), an inserting part (22) of the movable iron core (2) is connected with the middle part of a connecting part (21), and two ends of the connecting part (21) respectively extend to two sides of the static iron core (1) and are provided with driving parts (20) connected with the counter-force springs (4).

3. The electromagnetic system of claim 1, wherein: be equipped with locating part (5) on drive portion (20), locating part (5) are including installation department (51) and spacing portion (52), installation department (51) are used for with connecting portion (21) spacing cooperation, spacing portion (52) are used for with reaction spring (4) spacing cooperation.

4. An electromagnetic system according to claim 3, wherein: the mounting part (51) is of a U-shaped structure, and the mounting part (51) of the U-shaped structure is used for being clamped on the driving part (20) in a limiting fit manner; a limit groove (53) is formed in the driving part (20), and a limit strip (54) which is inserted into the limit groove (53) and in limit fit is arranged on the mounting part (51); the limiting part (52) is of a cylindrical structure, and one end of the counter-force spring (4) is used for being inserted into the limiting part (52) for limiting fit.

5. The electromagnetic system of claim 1, wherein: the electromagnetic system comprises two coils (3), the movable iron core (2) is provided with two insertion parts (22), the two insertion parts (22) are respectively connected with two driving parts (20), the two insertion parts (22) are respectively inserted into the two coils (3), and the two counter-force springs (4) are respectively sleeved on the two insertion parts (22).

6. The electromagnetic system of claim 5, wherein: an extension structure is arranged on the movable iron core (2), the extension structure is positioned between the two insertion parts (22), the extension structure comprises a first extension part (23) and a second extension part (24), the first extension part (23) is arranged on the side surface of the movable iron core (2) close to the static iron core (1), and the second extension part (24) is arranged on the side surface of the first extension part (23); the static iron core (1) is provided with a third extension part (25), and an extension surface which is arranged opposite to the second extension part (24) is arranged on the third extension part (25).

7. The electromagnetic system of claim 6, wherein: the static iron core (1) comprises a static iron core bottom plate, coil installation parts for installing coils (3) are arranged at two ends of the static iron core bottom plate on one side close to the movable iron core (2), and static iron core columns are arranged on one side, close to the movable iron core (2), of the middle part of the static iron core bottom plate in a protruding mode; the movable iron core (2) is provided with two extending structures arranged at intervals, the end part of the static iron core column can be inserted between the first extending parts (23) of the two extending structures, and the two sides of the static iron core column are convexly provided with third extending parts (25) which are respectively opposite to the second extending parts (24) of the two extending structures.

8. An electromagnetic system according to any one of claims 1-7, characterized in that: the insertion part (22) of the movable iron core (2) is provided with a slot (220).

9. An electromagnetic system according to any one of claims 1-7, characterized in that: the static iron core (1) and the movable iron core (2) are of silicon steel sheet overlapped riveting structures and comprise a plurality of silicon steel sheets which are arranged in a laminated mode.

10. A switching device, characterized by: the electromagnetic unit comprises an electromagnetic unit shell (200) and an electromagnetic system as claimed in any one of claims 1-9, wherein the electromagnetic unit and at least one contact unit are arranged side by side, the electromagnetic unit comprises a contact unit shell (100), a fixed contact and a movable contact are arranged in the contact unit shell (100), a first linkage hole (101) is formed in the side wall of the contact unit shell (100), a second linkage hole (201) is correspondingly formed in the side wall, close to the contact unit shell (100), of the electromagnetic unit shell (200), and a linkage rod (300) penetrates through the first linkage hole (101) and the second linkage hole (201) to connect a movable iron core (2) with the movable contact.