JPH0298905A - Stator for solenoid use - Google Patents

Abstract

PURPOSE:To make a stator small-sized without lowering a response performance as a solenoid by a method wherein a plurality of laminate sheets for stator use are laminated mutually in a radial shape and a column-shaped stator main body is formed. CONSTITUTION:A stator main body 1 for this solenoid is column-shaped and is assembled in a cylindrical housing. A plurality of laminate sheets 10 of an identical shape for stator use are laminated and formed mutually in a radial shape; a cut-out recess part 10a forming a circular groove 9 is formed at one part of each laminate sheet 10. An inner-edge face 10b of each laminate sheet 10 forms a through hole 7; an outer-edge face 10c at the opposite side forms an outer circumference face of the stator main body 1. Thereby, this stator main body can be made small without lowering a response performance as the solenoid.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stator for a solenoid used, for example, in a solenoid valve.

[Prior art and problems to be solved by the invention] Conventionally,
As this type of stator, those used for example in electromagnetic valves are generally known. For example, USP45
It is disclosed in Publication No. 68021.

That is, as shown in FIG. 1112, the stator body 21 used for the solenoid of the 'g1 magnetic valve is assembled into a cylindrical housing 22, and a part thereof has a recess 24 for mounting the @'41A23. It is provided. In addition, in order to improve the responsiveness of the magnetic valve 1, the stator body 21 is made of a thin plate E made of a soft magnetic material such as a silicon steel plate, as shown in FIG.
It is formed by laminating a plurality of shaped laminate plates 25.

However, in this case, since each stacked RFI plate 25 is made into the thin plate E shape, the magnetic pole shape of the stator body 21 is square, and when assembled into the cylindrical housing 22, a dead space 26 is inevitably created. There was a problem that the outer diameter became large.

On the other hand, in order to install a valve biasing spring, the 14th
．． As shown in Fig. 15, holes 27 and 28 are made in the stator body 21.
may be established.

In this case, as shown in FIG. 14, when holes 27 are drilled in the stator body 21 made of each laminated plate 25 using a drill or the like, each product It! There was a problem in that the insulating film applied in advance to the tff 125 would peel off, causing an increase in eddy current during excitation and reducing the responsiveness of the solenoid.

Also, instead of drilling the holes 27 with a drill or the like, as shown in FIG. 15, a laminated plate 25.
It is also possible to provide the stator main body 2I with holes 28 by providing the holes 29 and combining them. That is, the first
An E-shaped laminate 25 shown in FIG. 6 and a circular laminate 29 shown in FIG. 17 are provided, and these two types of laminates 25.2
Combine 9.

However, in this way, at least two types of laminates 25.2
There is a problem in that forming the stator main body 21 by providing the stator body 21 requires more manufacturing steps than forming the stator main body 21 by using only one type of laminate plate 25, resulting in higher costs.

This invention was made in view of the above-mentioned circumstances, and its purpose is to reduce the size of the solenoid without degrading the response performance of the solenoid, and to provide a through hole for attaching a valve biasing spring, etc. It is an object of the present invention to provide a stator for a solenoid which is capable of simplifying the manufacturing process.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, a plurality of stator laminates having the same shape are formed into a substantially fan-shaped cross section, and a part of the laminates is forming a notch recess,
The stator laminates are stacked radially on each other to form a cylindrical stator body having a circular groove for attaching the @ wire, which is a notched recess, centered around the central axis.

[Function] Therefore, since a plurality of stator laminated plates are laminated radially to form a cylindrical stator body, the magnetic pole outer shape of the stator body is circular, and the magnetic pole area is the same compared to a case where the magnetic pole outer shape is square. The outer diameter becomes smaller. or,
Dead space for the cylindrical housing is eliminated.

Furthermore, since each stator laminated plate is laminated radially to form a cylindrical stator body with a circular groove for mounting windings, it is possible to provide a through hole on the central axis of the stator body at the same time as lamination. There is no need to form holes using a drill or the like, and it is sufficient to form only one type of stator laminate.

[Embodiment] Hereinafter, an embodiment in which the present invention is embodied in a solenoid of a t-magnetic valve will be described in detail with reference to the drawings.

As shown in FIG. 1.2, the stator body 1 of this solenoid has a cylindrical shape and is assembled into a cylindrical housing 2.

This solenoid is applied to a well-known tVi valve 3 as shown in FIG. A through-hole 7 is provided in which a holder 6 is attached. Further, around the through hole 7, a circular groove 9 having the same size 7 as the center is provided for mounting the @'68.

The stator body l has a plurality of identical shapes (in this case, 40
) stator laminates 1o are filled radially with each other.
It is formed by ip. That is, as shown in FIG. 3, each laminate 10 has a circular shape, and a cutout recess 10a forming the circular groove 9 is formed in a part thereof. In addition, each laminate 10
The inner end surface 10b of the stator body 1 forms the through hole 7, and the outer end surface 10c on the opposite side thereof forms the outer circumferential surface of the stator main body 1. The portion W1 of the inner end surface 10b is smaller than the portion W2 of the outer end surface 10c, so that the bottom surface 10d of the laminated FilO, that is, the plate thickness cross section, is approximately fan-shaped.

Here, to briefly explain the manufacturing process of the stator main body 1, first, a plate material 11 as shown in FIG. 4 is pressed out to obtain a circular plate piece 11a as shown in FIG. Furthermore, the plate piece 11a is press-molded to form a laminate plate 10 having a substantially fan-shaped cross section.
get. Then, a plurality of the laminated plates 1o formed in this manner are laminated in a radial manner and caulked with a tightening material 12 to obtain a cylindrical stator main body l.

In this case, as the number of laminated plates 1o in the stator body 1 increases, the eddy current generated during excitation can be reduced, and the attraction force as a solenoid can be increased.

Note that the number of each laminated plate 1o forming the stator body 1 is determined by the degree W of the inner end surface 10b taking into consideration the mechanical strength of the laminated plate 10.
1, and when a normal material is used, the degree W1 can be reduced to about 0.1 mm.

Therefore, since the stator body 1 of this embodiment has a cylindrical outer shape, the stator body 1 has a cylindrical shape as shown in FIGS.
can be fitted and assembled into the cylindrical housing 2, and dead space for the housing 2 can be eliminated.

Further, a through hole 7 is provided in the center of the cylindrical stator body 1,
Since a circular groove 9 was provided around the through hole, the second and ninth
As shown in the figure, the outer diameter of the magnetic poles is circular, and compared to the conventional stator body 21 in which the outer shape of the magnetic poles is square as shown in Figure 14.19, the outer diameter can be made smaller for the same magnetic pole area S. can.

It is generally known that in a solenoid, the maximum attractive force when the stator body is made of the same material is proportional to the magnetic pole area S thereof. Therefore, when the maximum suction force as a solenoid, that is, the response performance is kept constant, the stator main body 1 of this embodiment can have a smaller outer diameter and can be made smaller as a whole.

Here, FIG. 8 shows the relationship between the magnetic pole area S of the stator body and its outer diameter. As is clear from this figure, as the magnetic pole area S increases, the outer diameter increases. Furthermore, it can be seen that the outer diameter of the stator main body 1 of this embodiment is smaller than that of the conventional example.

For example, when the magnetic pole area S is 230 mm2, the stator main body 1 of this embodiment has an outer diameter of 23.6 mm, and the stator main body 21 of the conventional example has an outer diameter of 29.4 mm.
becomes. That is, in this case, according to the stator main body 1 of this embodiment, the outer diameter can be reduced by 5.13 mm.

In addition, in this embodiment, the cylindrical stator body 1 having the through holes 7 and the circular grooves 9 can be formed by laminating the laminated plates 10 of the same shape radially, so that only one type of laminated plate lO is used. Thus, the stator main body 1 can be formed. In addition, since the through holes 7 can be provided at the same time as the stator body 1 is formed, there is no need to use a drill or the like to provide the holes 7.

Therefore, unlike the case where the stator body 21 is formed by a combination of two types of laminated plates 25 and 29 in the conventional example, the manufacturing process of the stator body 1 can be simplified, and a rise in manufacturing costs can be prevented. can do. Furthermore, unlike the case where the holes 27 are formed using a drill or the like in the conventional example, there is no possibility of peeling off the insulating film previously applied to each laminate plate 10 or damaging each laminate plate 10, thereby reducing the responsiveness of the solenoid. do not have.

Note that this invention is not limited to the above embodiments,
The present invention can be implemented as follows by changing a part of the structure as appropriate without departing from the spirit of the invention.

(1) In the embodiment described above, the stator main body 1 was configured to be formed of 40 laminated plates 10, but it may be configured to be formed of a different number of laminated plates. In this case, by decreasing the number of laminates, the thickness of each laminate increases, and by increasing the number of laminates, the thickness of each laminate decreases.

(2) In the above embodiment, the solenoid valve 3 has a through hole 7.
A spring 6 for biasing the valve member 5 is attached to the valve member 5, and a hard member is press-fitted into the through hole 7 and brought into contact with the valve member to provide the function of the spring 7. Good too.

(3) In the embodiment described above, the embodiment 1 was applied to the magnetic valve 3, but it may be applied to other actuators.

(4) In the above embodiment, the stator main body 1 has the through hole 7 on the central axis kIAL, but the stator main body 1 may have no through hole.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to miniaturize the solenoid without reducing its response performance, and it is also possible to provide a through hole for mounting a valve biasing spring, etc. In addition, the manufacturing process can be simplified, and the manufacturing cost can be prevented from rising, which is an excellent effect.

[Brief explanation of the drawing]

1 to 10 are drawings showing an embodiment embodying the present invention, in which FIG. 1 is a vertical sectional view of a solenoid, and FIG.
The figures are a front plan view of Fig. 1, Fig. 3 is a perspective view showing a laminate, Fig. 4 is a perspective view showing a plate material for manufacturing a laminate, and Fig. 5 is a perspective view showing a pressed plate piece. , FIG. 6 is a perspective view showing a press-formed laminated plate, FIG. 7 is a perspective view showing a stator body formed by a plurality of laminated plates, and FIG. 8 is a relationship between the magnetic pole area and the outer diameter of the stator body. Figure 9 is a plan view showing the magnetic pole area and outer diameter of the stator body.
Figure 0 is a partially cutaway side view showing the solenoid of this embodiment applied to an electromagnetic valve. 11 to 18 are drawings showing a conventional example, in which FIG. TI is a longitudinal sectional view of the solenoid, FIG. 12 is a front plan view of FIG. 11, and FIG. FIG. 14 is a front view plan view showing another solenoid, FIG. 15 is a front view plan view showing another solenoid, and FIGS. 16 and 17 are perspective views showing laminated plates for forming the stator body of FIG. 15. 18 are plan views showing the magnetic pole area and outer diameter of the stator body. In the figure, 1 is the stator body, 8 is the winding, 9 is the circular groove, and 10 is the stator body.
is a laminated plate, IOa is a notch recess, and L is a central axis.

Claims (1)

[Claims] 1. A plurality of stator laminates having the same shape are formed into a substantially fan-shaped cross-section, and a notch is formed in a part of the laminate, and the stator laminates are stacked radially on each other. 1. A stator for a solenoid, characterized in that the stator body has a cylindrical shape and has a circular groove for mounting a winding formed of the notched recess around the central axis.