CN221257853U - Electromagnetic valve - Google Patents

Abstract

The utility model discloses a solenoid valve, comprising: the stator core is of a one-piece structure, the stator core comprises an inner cavity, an armature is arranged in the inner cavity, and the armature can move axially relative to the stator core. The utility model can improve the coaxiality of the armature and the stator core.

Description

Electromagnetic valve

Technical Field

The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve.

Background

The solenoid valve (Solenoid valve) is an important valve type, is an automatic basic element for controlling fluid, and has wide application in the automobile industry due to the advantages of quick response, sensitive control and the like.

The existing electromagnetic valve on the market is mostly designed by a separated upper iron core and a separated lower iron core, the separated upper iron core and the separated lower iron core are required to be respectively pressed and assembled twice, the coaxiality of the upper iron core and the lower iron core is difficult to ensure, and further the coaxiality of an armature and a stator iron core is also problematic.

Disclosure of utility model

The utility model aims to solve the problem of poor coaxiality of an armature and a stator core. The utility model provides an electromagnetic valve which can improve the coaxiality of an armature and a stator core.

To solve the above technical problems, an embodiment of the present utility model discloses an electromagnetic valve, including: the stator core is of a one-piece structure, the stator core comprises an inner cavity, an armature is arranged in the inner cavity, and the armature can move axially relative to the stator core.

By adopting the technical scheme, the stator core is of a one-piece structure, namely, compared with the upper iron core and the lower iron core in the prior embodiment, the two independent iron cores are integrated to form a whole, so that the coaxiality of the whole stator core is ensured, the coaxiality between the stator core and the armature is higher, and the loss caused by lateral force in the moving process of the armature is reduced. In other words, it is also more convenient to control the radial gap between the armature and the cavity wall of the inner cavity of the stator core, and further more convenient to further reduce the radial gap between the armature and the cavity wall of the stator core in design, thereby improving the electromagnetic force. On the other hand, compared with the existing upper iron core and the existing lower iron core, the one-piece stator core of the scheme reduces one part, so that the cost is reduced, the production time is shortened, and the production beat is improved.

According to another embodiment of the present utility model, the stator core includes a first core portion, a connecting portion, and a second core portion along the axial direction, the first core portion and the second core portion being connected by the connecting portion, the connecting portion being composed of a plurality of connecting posts.

By adopting the technical scheme, the first iron core part and the second iron core part which are used as the upper part and the lower part of the stator core along the axial direction are coaxial, so that the coaxiality between the stator core and the armature is higher, and the radial gap between the armature and the cavity wall of the stator core can be reduced as much as possible on the basis, thereby improving the electromagnetic force.

That is, compared with the split upper and lower iron cores in the existing one embodiment, the scheme only needs to consider the coaxiality between the stator iron core and the armature, but does not need to consider the coaxiality between the split upper and lower iron cores and the armature, so that the radial gap between the armature and the cavity wall of the stator iron core is more convenient to control, the electromagnetic force is increased, and the performance of the electromagnetic valve is improved.

According to another embodiment of the utility model, said connection consists of at least 2 of said connection posts.

According to another embodiment of the present utility model, at least 2 of the connection posts are disposed at intervals along the circumferential direction of the stator core.

According to another embodiment of the utility model, the number of the connecting columns is four.

By adopting the technical scheme, the material removing treatment is carried out at the connection junction of the first iron core part and the second iron core part, and only a plurality of connecting columns are reserved, so that the magnetic gap is formed while the first iron core part and the second iron core part are in an integrated structure, and the magnetic leakage loss in the working process of the electromagnetic valve is reduced.

According to another embodiment of the present utility model, the first core portion includes an upper constant diameter portion and an upper contracted portion connected to each other, and an outer diameter of the upper contracted portion is gradually reduced in the axial direction and toward the second core portion; the second iron core part comprises a lower constant diameter part and a lower contraction part which are connected, and the outer diameter of the lower contraction part gradually decreases along the axial direction and towards the first iron core part; the upper end and the lower end of the connecting column along the axial direction are respectively connected with the upper contraction part and the lower contraction part.

According to another embodiment of the present utility model, the upper and lower constant diameter portions have the same outer diameter.

According to another embodiment of the utility model, the outer diameter of the upper constant diameter portion is smaller than the outer diameter of the lower constant diameter portion.

By adopting the technical scheme, the diameter gradual transition (namely the upper contraction part and the lower contraction part) is made at the joint of the first iron core part and the second iron core part, so that magnetic force lines are better guided, the radial component of the magnetic force lines is reduced, the electromagnetic force is increased, and the performance of the electromagnetic valve is improved.

According to another embodiment of the utility model, the solenoid valve further comprises a shaft, and the armature is sleeved on and fixed to the shaft.

By adopting the technical scheme, the shaft is axially movably supported in the inner cavity, so that when the coil of the electromagnetic valve is electrified, the armature drives the shaft to axially move upwards, and the opening function of the electromagnetic valve is realized.

Drawings

FIG. 1 shows a cross-sectional view of a solenoid valve according to an embodiment of the utility model;

fig. 2 shows a perspective view of a stator core according to an embodiment of the present utility model;

Fig. 3 shows a sectional view of a stator core according to an embodiment of the present utility model.

Reference numerals: 1. an electromagnetic valve; 2. a stator core; 20. an inner cavity; 21. a first core part; 22. a second core part; 23. a connection part; 231. a connecting column; 210. an upper constriction; 211. an upper constant diameter portion; 220. a lower constriction; 221. a lower constant diameter portion; 3. an armature; 4. a shaft; 5. an upper bearing; 6. and a lower bearing.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, the present application provides a solenoid valve 1 including: a stator core 2 and an armature 3; wherein, stator core 2 is a one-piece structure, i.e. stator core 2 is integrally formed. The stator core 2 includes an inner cavity 20, and an armature 3 is provided in the inner cavity 20, and the armature 3 is movable in an axial direction (shown in a Z direction in fig. 1) with respect to the stator core 2. The armature 3 and the cavity wall of the inner cavity 20 of the stator core 2 are adjacent in the radial direction (shown in the X direction in fig. 1). The armature 3 is made of a magnetic material, such as a ferromagnetic material (e.g., iron).

By adopting the technical scheme, the stator core 2 is of a one-piece structure, namely, compared with the split upper and lower cores in the prior embodiment, the two independent cores are integrated to form a whole, so that the whole coaxiality of the stator core 2 is ensured, and the coaxiality between the stator core 2 and the armature 3 is higher, thereby reducing the loss caused by lateral force in the moving process of the armature 3. In other words, it is also easier to control the radial gap between the armature 3 and the cavity wall of the inner cavity 20 of the stator core 2, and further easier to further reduce the radial gap between the armature 3 and the cavity wall of the stator core 2 in design, thereby enhancing the electromagnetic force. On the other hand, compared with the existing split upper and lower two iron cores, the one-piece stator core 2 reduces one part, thereby reducing the cost, shortening the production time and improving the production beat.

In some possible embodiments, referring to fig. 1 to 3, in an axial direction (shown in a Z direction in fig. 2), the stator core 2 includes a first core portion 21, a connection portion 23, and a second core portion 22, the first core portion 21 and the second core portion 22 being connected by the connection portion 23, the connection portion 23 being composed of a plurality of connection posts 231. Illustratively, the connecting posts 231 are connected to the first core part 21 and the second core part 22 at upper and lower ends thereof in the axial direction, respectively.

Illustratively, the stator core 2 is cylindrical-like in shape, and the first core portion 21 and the second core portion 22 are also cylindrical-like in shape. The first core portion 21 and the second core portion 22 are upper and lower portions of the stator core 2 in the axial direction, and are connected by the connecting portion 23, and the central axis of the first core portion 21 and the central axis of the second core portion 22 are both on the same line as the central axis of the stator core 2, that is, the first core portion 21 and the second core portion 22 are coaxial. The coaxiality between the stator core 2 and the armature 3 is higher, and the loss caused by lateral force during the movement of the armature 3 is reduced. On the basis of which the radial gap between the armature 3 and the chamber wall of the stator core 2 can be reduced as much as possible, thereby improving the electromagnetic force.

In summary, compared with the split upper and lower iron cores in the existing one embodiment, the scheme only needs to consider the coaxiality between the stator iron core 2 and the armature 3, but does not need to consider the coaxiality between the split upper and lower iron cores and the armature, so that the radial gap between the armature 3 and the cavity wall of the stator iron core 2 is more convenient to control, the electromagnetic force is increased, and the performance of the electromagnetic valve 1 is improved.

In some possible embodiments, referring to fig. 2 and 3, the connection portion 23 is composed of at least 2 connection posts 231. At least 2 connection posts 231 are provided at intervals along the circumferential direction (indicated by the R direction in fig. 2) of the stator core 2. Illustratively, the number of the connecting posts 231 is four, and the included angle between the connecting lines of two adjacent connecting posts 231 is 90 degrees. However, the present application does not limit the arrangement form of the connection posts 231, and the connection posts 231 may be three, five or more, so long as the integrated structure of the stator core 2 can be ensured, thereby ensuring the coaxiality of the first core portion 21 and the second core portion 22.

Illustratively, the stator core 2 is an integrated structure, which is subjected to material removal treatment at the junction of the first core portion 21 and the second core portion 22, and only a plurality of connecting posts 231 are reserved, so that the first core portion 21 and the second core portion 22 are ensured to form a magnetic gap while being an integrated structure, and the magnetic leakage loss in the working process of the electromagnetic valve is reduced.

Illustratively, the blanking process at the junction of the first core portion 21 and the second core portion 22 may be achieved by machining, sidecutting, powder metallurgy, or the like.

In some possible embodiments, referring to fig. 2 and 3, the first core part 21 includes an upper constant diameter part 211 and an upper shrinkage part 210 connected, and an outer diameter of the upper shrinkage part 210 gradually decreases in an axial direction and toward the second core part 22 (shown in an N direction in fig. 3); the second core portion 22 includes a lower constant diameter portion 221 and a lower constricted portion 220 connected to each other, and an outer diameter of the lower constricted portion 220 gradually decreases in an axial direction and toward the first core portion 21 (shown in an M direction in fig. 3); the upper and lower ends of the connection portion post 231 in the axial direction are connected to the upper and lower constricted portions 210 and 220, respectively. The outer diameters of the upper and lower isodiametric portions 211 and 221 may be the same or different, and the present application is not limited thereto. Alternatively, the outer diameter of the upper constant diameter portion 211 is smaller than the outer diameter of the lower constant diameter portion 221.

That is, the junction of the first core part 21 and the second core part 22 makes a diameter gradual transition (i.e., the upper and lower shrinkage parts 210 and 220), thereby better guiding the magnetic force lines, reducing the radial component of the magnetic force lines, helping to increase the electromagnetic force, and further improving the performance of the electromagnetic valve.

In some possible embodiments, referring to fig. 1, the solenoid valve 1 further comprises a shaft 4, the armature 3 being sleeved and fixed to the shaft 4. Illustratively, the solenoid valve 1 further comprises an upper bearing 5 and a lower bearing 6, the shaft 4 being made of metal, the shaft 4 being axially movably supported within the inner chamber 20 by means of the upper bearing 5 and the lower bearing 6, so as to effect that when the coil of the solenoid valve 1 is energized, the armature 3 drives the shaft 4 in an axially upward direction (indicated in the direction M in fig. 1) to effect the opening function of the solenoid valve 1.

The solenoid valve 1 is illustratively a canister solenoid valve, a turbo charged solenoid relief valve or an exhaust gas recirculation solenoid valve.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims (9)

1. A solenoid valve, comprising:

The stator core is of a one-piece structure, the stator core comprises an inner cavity, an armature is arranged in the inner cavity, and the armature can move axially relative to the stator core.

2. The electromagnetic valve according to claim 1, wherein the stator core includes a first core portion, a connecting portion, and a second core portion in the axial direction, the first core portion and the second core portion being connected by the connecting portion, the connecting portion being composed of a plurality of connecting posts.

3. The solenoid valve of claim 2 wherein said connection is comprised of at least 2 of said connection posts.

4. A solenoid valve according to claim 3 wherein at least 2 of said connecting posts are spaced circumferentially about said stator core.

5. The solenoid valve of claim 2 wherein said connecting posts are four.

6. The electromagnetic valve according to claim 2, wherein the first core portion includes an upper constant diameter portion and an upper contracted portion that are connected, the upper contracted portion having an outer diameter that gradually decreases in the axial direction and toward the second core portion; the second iron core part comprises a lower constant diameter part and a lower contraction part which are connected, the outer diameter of the lower contraction part gradually decreases along the axial direction and towards the direction of the first iron core part, and the upper and lower ends of the connecting column along the axial direction are respectively connected with the upper contraction part and the lower contraction part.

7. The solenoid valve of claim 6 wherein said upper and lower constant diameter portions have the same outside diameter.

8. The solenoid valve of claim 6 wherein the outer diameter of said upper constant diameter portion is smaller than the outer diameter of said lower constant diameter portion.

9. The solenoid valve of claim 1 further comprising a shaft, wherein the armature is nested and secured to the shaft.