JPH06295814A - Flanged core - Google Patents

Abstract

PURPOSE:To decrease reluctance of magnetic circuit by providing a flanged plate body having substantially C-shaped cross-section at the peripheral part of an opening thereby preventing noise or loosening due to vibration and esablishing positive electromagnetic coupling. CONSTITUTION:A core 1 comprises a plate body having a central opening wherein the peripheral part 3 of the opening 2 has a substantially C-shaped cross-section. The opening 2 provides a space for allowing reciprocation of the oscillator of a pump. An magnetic interaction pole is disposed between the inner wall 3a on the opening 2 side of the peripheral part 3 and a permanent magnet secured to the oscillator. A flange part 4 is formed on the farther outside (peripheral edge side) of the peripheral part 3. Bolt holes 5 for securing the core 1 are made through the flange part 4. Positional accuracy of the bolt hole 5 is determined such that the accuracy of the inner diameter (cylindricality) of the core.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flanged iron core. More specifically, the present invention relates to a flanged iron core that can improve assembly accuracy and prevent noise generation and loosening due to vibration.

The flanged iron core of the present invention reciprocates the oscillator by magnetic interaction between the oscillator with a permanent magnet connected to the diaphragm and an electromagnet provided so as to surround the oscillator. It is used for the electromagnet of an electromagnetically driven fluid pump that drives a diaphragm in association with reciprocating motion to suck and discharge fluid.

[0003] The fluid pump is used for a fish tank, a domestic septic tank, a gas pressure feed, etc. when air is targeted, while a liquid transfer, a spray, and a spray are used when water is targeted.
Used for painting and physics and chemistry equipment.

[0004]

2. Description of the Related Art Conventionally, as an iron core of an electromagnet in a pump of this type, as shown in FIG.
There is something shown in. The iron core 20 is formed by forming ring bodies having a substantially U-shaped cross section so that their opening sides face each other. Then, the coil frame 21 in which the copper wire is wound is arranged in the donut-shaped space. 22 is an iron core
It is an outer cylinder arranged on the outer periphery of 20, and the iron core 20 is fixed to the outer cylinder 22 by press fitting, screwing or the like.

However, since the conventional iron core 20 requires the outer cylinder 22 as described above, and the manufacturing accuracy of the outer cylinder 22 determines the accuracy of the inner diameter of the iron core 20, the concentricity between the iron cores is reduced. It was

Further, since there is a gap G at the joint between the iron core pieces, there are problems that noise is generated and electromagnetic coupling is loosened due to the reciprocating motion of the vibrator.

Further, since press work or cutting work in a direction perpendicular to the axial direction is required to obtain the flatness of the joint portion between the iron cores, the work is troublesome and the cost is high (mold cost, There is a problem of (processing cost).

The present invention has been made in view of the circumstances described above, and an object thereof is to provide a flanged iron core in which the drawbacks of the prior art described above are eliminated. That is, the object of the present invention is to improve the assembling accuracy, to prevent noise generation and loosening due to vibration, and to secure the electromagnetic coupling to reduce the resistance of the magnetic circuit. The purpose is to provide an iron core.

[0009]

A flanged iron core of the present invention comprises a plate body having an opening formed in the center, and a peripheral portion around the opening has a substantially U-shaped cross-section. It is characterized in that a flange portion is formed further outside the peripheral portion.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the flanged iron core of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an explanatory plan view of an embodiment of a flanged iron core of the present invention, and FIG. 2 is a sectional view taken along the line A--O--B of the flanged iron core shown in FIG.

An iron core 1 shown in FIGS. 1 and 2 comprises a plate body having an opening 2 formed in the center thereof, and a peripheral portion 3 around the opening 2 has a substantially U-shaped cross section. .
The opening 2 provides a space in which a vibrator of the pump described later reciprocates. The inner wall 3a of the peripheral portion 3 on the side of the opening 2 constitutes a magnetic pole that exerts a magnetic interaction with the permanent magnet fixed to the vibrator. A flange portion 4 is formed further outside (peripheral side) of the peripheral portion 3. The flange portion 4 is provided with bolt holes 5 for fixing the iron core. The number of bolt holes 5 is not particularly limited in the present invention, but about 4 to 8 is a standard. Further, the positional accuracy of the bolt holes 5 is taken into consideration so as to increase the internal diameter accuracy (cylindricity) between the iron cores.

The iron core 1 shown in FIGS. 1 and 2 accommodates one coil as a set of two iron cores as shown in FIG. At that time, a pair of iron cores 1 are set with the open sides of the peripheral portions 3 facing each other, and bolts are inserted into the bolt holes 5 to fix the iron cores.

A protrusion 6 and a hole 7 for fitting are formed on the central wall 3b of the peripheral portion 3, and the iron core can be positioned easily and accurately by using the protrusion 6 and the hole 7. . Further, by fixing the iron cores to each other by using the projections 6 and the holes 7, the iron cores do not loosen in the direction perpendicular to the axis due to vibration during pump operation. A recess may be formed instead of the hole 7.

The projections 6 and the holes 7 may be formed by forming only the projections 6 on one of the pair of back-to-back iron cores and forming only the holes 7 on the other, but the projections 6 and the holes 7 are alternately formed, for example. If the cores are formed and the cores are shifted so that the protrusions 6 and the holes 7 are fitted to each other when they are placed back to back, the number of types of cores to be manufactured can be reduced and the manufacturing cost can be reduced.

Further, since the iron core 1 of the present invention is not a connecting method such as the iron core 20 at a cut portion perpendicular to the axis, it can be manufactured by press working only in the axial direction, and press working in the direction perpendicular to the axis. Alternatively, the machining becomes easier than that of the conventional product which requires cutting.

FIG. 3 shows an example of use of the iron core shown in FIGS. 1 and 2, for the sake of clarity, the upper half is a cross-sectional view and the lower half is a plan view.

The iron cores 1 are arranged so that the open sides of their peripheral portions face each other. A coil 11 in which a copper wire is wound around a coil frame 10 made of 6,6 nylon or the like is arranged in the substantially donut-shaped space.

A vibrator 13 having a permanent magnet 12 is arranged in the opening 2 of the iron core 1. Both ends of the vibrator 13 are connected to a diaphragm 15 made of EPDM or the like via a center plate 14. The center plates 14 are provided on both sides of the diaphragm 15, and the diaphragm 15
It is an element that pushes and pulls 15 to displace it to the left and right (in FIG. 3). The center plate 14 and the diaphragm 15 are
It is interposed between the nut 16 and the mounting seat 17,
It is fixed to the tip of the vibrator 13 by being tightened by the nut 16. Although not shown, a suction chamber and a discharge chamber provided with a valve are provided outside the diaphragm so that the fluid can be moved.

Further, diaphragm bases 18 for mounting diaphragms are attached to the left and right of the iron core group of the present invention.
The center of the seat of the diaphragm base is made to coincide with the center of the inner diameter of the iron core, and the center of the diaphragm is also made to coincide with the center of the oscillator shaft, so that the gap between the field yoke 13a of the oscillator and the inner wall 3a of the iron core is completely eliminated. It is important to make them the same around the circumference and to keep the void differences as small as possible.

If the convex portion 6 and the hole 7 of the iron core of the present invention are structured so that the bearing base 18a integrated with the diaphragm base 18 is connected to the convex portion 6 or the hole 7 of the iron core, the concentric portion is formed. The degree of accuracy is maintained correctly in the iron core inner wall 3a, the vibrator yoke 13a, the bearing base 18a, the diaphragm 15, and the diaphragm base 18. Therefore, it is very effective in improving the performance and power factor of the pump and the life of the bearing.

In the above embodiment, the flange is provided with a hole for inserting the fastening bolt, but instead of the hole, a fitting protrusion such as the protrusion 6 or the hole 7, a hole or a recess is formed. It may be formed. In this case, the iron cores can be continuously fastened without using bolts, and the positioning accuracy can be improved and multiple connections can be achieved at the same time.

[0023]

As described above, in the flanged core of the present invention, the flange is provided in the peripheral portion of the core, and the core can be fixed by using this flange. If a protrusion and a hole or a recess corresponding to the protrusion are formed in the iron core and used for positioning, the assembly accuracy can be improved and noise generation and loosening due to vibration can be prevented. And it can contribute to the improvement of pump performance.

[Brief description of drawings]

FIG. 1 is a plan explanatory view of an embodiment of a flanged iron core of the present invention.

FIG. 2 is a cross-sectional view of the flanged iron core shown in FIG. 1 taken along the line A-O-B.

FIG. 3 is a partially cutaway plan view of an electromagnetically driven fluid pump including the flanged iron core shown in FIG.

FIG. 4 is a cross-sectional explanatory view of a conventional iron core.

[Explanation of symbols]

 1 Iron core 2 Opening part 3 Peripheral part 4 Flange part 5 Bolt hole 6 Protrusion 7 hole

Claims (6)

[Claims] 1. A plate body having an opening formed in the center thereof, wherein a peripheral portion around the opening has a substantially U-shaped cross-section, and a flange portion is formed further outside the peripheral portion. An iron core with a flange characterized by: 2. The iron core with flange according to claim 1, wherein a hole for inserting a fastening bolt is formed in the flange portion. 3. A projection for fitting on the flange portion and / or
Alternatively, the flanged iron core according to claim 1, which is formed with holes. 4. A protrusion for fitting on the flange portion, and / or
Alternatively, the flanged core according to claim 1, wherein a recess is formed. 5. The iron core with flange according to claim 1, wherein a protrusion and / or a hole for fitting is formed in the peripheral portion of the opening. 6. The flanged iron core according to claim 1, 2, 3 or 4, wherein a projection and / or a recess for fitting is formed in a peripheral portion of the opening.