WO2018033986A1

WO2018033986A1 - Electromagnet and method for producing electromagnet

Info

Publication number: WO2018033986A1
Application number: PCT/JP2016/074121
Authority: WO
Inventors: 長谷川　覚
Original assignee: 三菱電機株式会社
Priority date: 2016-08-18
Filing date: 2016-08-18
Publication date: 2018-02-22

Abstract

An electromagnet (3) is provided with: an electromagnetic coil (30) that has an inner iron core (50) formed into a shape similar to a rectangular parallelepiped, a plurality of split bobbins (10) attached to corners of the inner iron core (50), and a coil (60) wound around the inner iron core (50) to which the split bobbins (10) are attached; and an outer iron core (40) having, at the center portion thereof, a recessed part in which the electromagnetic coil (30) is fixed.

Description

Electromagnet, method for producing electromagnet

This invention relates to an electromagnet and an electromagnet manufacturing method.

Conventionally, when an electromagnet is manufactured, as shown in FIGS. 12 to 13, a resin bobbin 100 provided with a protrusion 101 for preventing the electromagnet from falling off is fitted into a core 110, and the upper and lower portions are wound up. It is sandwiched between the frame 120 and the lower winding frame 130 and mounted on the winding machine, and the coil 140 is wound. Thereafter, the upper winding frame 120, the lower winding frame 130, and the core 110 are removed, and the inner core and the outer core are integrally formed as shown in FIG. 13, and are fitted into the inner core of the field 150 of the electromagnet. An electromagnet was manufactured by fixing with

International Publication No. 2007/096955

However, in the conventional method of manufacturing an electromagnet, the step of fitting the bobbin 100 into the core 110, the step of sandwiching the upper and lower sides by the upper winding frame 120 and the lower winding frame 130, the step of winding the coil 140 around the bobbin 100, the upper winding Since the step of removing the frame 120, the lower winding frame 130, and the winding core 110 from the bobbin 100 is necessary, there is a problem that the number of manufacturing steps for manufacturing the electromagnet is large. Moreover, since it is necessary to manufacture the bobbin 100 of a different dimension according to the size of the brake, a plurality of molding dies for the bobbin 100 had to be manufactured.

The present invention has been made to solve the above-described problems, and an object thereof is to obtain an electromagnet capable of reducing the number of manufacturing steps and an electromagnet manufacturing method.

An electromagnet according to the present invention includes an inner iron core formed in a shape similar to a rectangular parallelepiped, a plurality of divided bobbins attached to corners of the inner iron core, and a coil wound around an inner iron core to which a plurality of divided bobbins are attached, And an outer iron core having a concave portion at the center and the electromagnetic coil being fixed to the concave portion.

According to the electromagnet according to the present invention, a plurality of divided bobbins can be attached to the inner iron core separated from the outer iron core of the electromagnet, and the winding can be performed. The number of can be reduced.

It is a figure which shows the brake device of the winding machine using the electromagnet in Embodiment 1 of this invention. It is a figure which shows the structure of the electromagnet of FIG. FIG. 3 is a perspective view of a divided bobbin attached to the electromagnet of FIG. 2. It is a top view of the division | segmentation bobbin attached to the electromagnet of FIG. FIG. 5 is a cross-sectional view of a divided bobbin along the line VV in FIG. 4. It is a perspective view of an inner iron core which comprises the electromagnet of FIG. FIG. 3 is a top view of an inner iron core that constitutes the electromagnet of FIG. 2. FIG. 8 is a cross-sectional view of the inner iron core taken along line VIII-VIII in FIG. 7. It is a figure which shows the state which attaches a division | segmentation bobbin to the corner | angular part of the inner iron core of FIG. It is a figure which shows the inner iron core with a bobbin in which the division | segmentation bobbin was attached to the inner iron core of FIG. It is a figure which shows the modification of Embodiment 1 of this invention. It is a figure which shows the conventional electromagnet manufacturing process which fixes a core and a winding frame to a bobbin. It is a figure which shows the process of giving a winding to the bobbin of FIG. 12 and fixing to the field of an electromagnet.

Hereinafter, preferred embodiments of the electromagnet and the method for producing the electromagnet of the present invention will be described with reference to FIGS.

Embodiment 1 FIG.
FIG. 1 is a diagram illustrating a brake device 2 of a hoisting machine 1 to which an electromagnet 3 according to Embodiment 1 of the present invention is attached. 2 is a configuration diagram of the electromagnet 3 of FIG. 1, FIG. 3 is a perspective view of the divided bobbin 10 attached to the electromagnet 3 of FIG. 2, FIG. 4 is a top view of the divided bobbin 10, and FIG. 4 is a cross-sectional view of the divided bobbin 10 along the line VV in FIG. 4, FIG. 6 is a perspective view of the inner iron core 50 constituting the electromagnet 3 in FIG. 2, FIG. 7 is a top view of the inner iron core 50, and FIG. FIG. 6 is a cross-sectional view of the inner iron core taken along line VIII-VIII in FIG. 5. 9 is a view showing a state in which the plurality of divided bobbins 10 are attached to the corners B of the inner iron core 50 shown in FIG. 7, and FIG. 10 is an inner view with a bobbin in which the divided bobbins 10 are attached to the inner iron core 50. 1 is a diagram showing an iron core 20.

As shown in FIG. 1, the hoisting machine 1 includes a brake device 2 and a sheave (not shown) provided integrally with the rotor drum 4 of the brake device 2, and the rotor drum 4 and the sheave are rotated. The shaft 8 is rotatably supported and is rotated by an electric motor (not shown). The brake device 2 includes an armature 6, a lining 5 attached to the armature 6, and an electromagnet 3 that displaces the armature 6. The lining 5 is displaced together with the armature 6 and is pressed against the braking surface provided on the inner peripheral surface of the rotor drum 4 to brake the rotor drum 4 and the sheave.

As shown in FIG. 2, the electromagnet 3 for displacing the armature 6 includes an outer iron core 40 having a concave portion C at the center and an electromagnetic coil 30 fixed to the concave portion C of the outer iron core 40 with an adhesive or the like. The electromagnetic coil 30 is formed by an inner iron core 20 with a bobbin around which a coil 60 is wound. Furthermore, the inner iron core 20 with a bobbin is constituted by an inner iron core 50 that is a separate body from the outer iron core 40, and four divided bobbins 10 having the same shape and attached to four corners of the inner iron core 50. . The brake device 2 in FIG. 1 presses the lining 5 from the inside of the rotor drum 4 to brake the rotor drum 4. However, the brake device that presses the lining from the outside of the rotor drum 4 or a brake A brake device that brakes the brake disc by sandwiching the disc may be used.

As shown in FIGS. 3 to 5, the divided bobbin 10 includes a top plate 11, a bottom plate 12, and a side plate 13 that is erected vertically with respect to the top plate 11 and the bottom plate 12 and bent 90 degrees in an arc shape. The top plate 11, the bottom plate 12 and the side plate 13 are integrally molded using a resin material. As shown in the perspective view of FIG. 3 and the cross-sectional view of FIG. 5, the divided bobbin 10 has a recess A surrounded by the top plate 11, the bottom plate 12 and the side plate 13, and the side opposite to the recess A across the side plate 13. And a flange portion F, which is formed by a top plate 11 and a bottom plate 12 that are extended to each other. And the protrusion part a which protruded toward the recessed part side along the edge part of the top plate 11 and the baseplate 12 is formed in the linear form above and below the opening part of the recessed part A.

6 and 7, the inner iron core 50 has a shape similar to a rectangular parallelepiped, and the four corners B are formed in an arc shape when viewed from above. Further, as shown in the cross-sectional views of FIGS. 6 and 8, stepped portions 50 a having a shape with a certain thickness removed are formed on the upper and lower surfaces of each corner B of the inner iron core 50. Further, in each step portion 50a, a groove portion b having a certain width and depth is formed linearly along the end portion at the end portion on the center side of the inner iron core 50.

As shown in FIGS. 9 and 10, by attaching the divided bobbins 10 to the four corners B of the inner iron core 50, the inner iron core 20 with a bobbin is formed. When attaching the divided bobbin 10 to the inner iron core 50, the corner B of the inner iron core 50 is covered while elastically deforming the opening of the recess A of the divided bobbin 10, and the protrusions provided above and below the opening of the recess A The split bobbin 10 is pushed in until the part a is fitted into the groove part b on the upper surface and the lower surface of the inner iron core 50. Thereby, the four divided bobbins 10 are fixed to the four corners B of the inner iron core 50, and the inner iron core 20 with the bobbin is formed. The bobbin-equipped inner core 20 is put into a winding machine, and the coil 60 is wound inside the flange portion F of the divided bobbin 10 to form the electromagnetic coil 30 shown in FIG. And this electromagnetic coil 30 is fixed to the recessed part C formed in the center part of the outer side iron core 40 with an adhesive agent etc., and the electromagnet 3 is formed.

As described above, in the first embodiment, the inner iron core 50 and the outer iron core 40 of the electromagnet 3 are separated, the four divided bobbins 10 are attached to the four corners B of the inner iron core 50, and the electromagnetic coil 30 is made. Since it forms, even if it is a case where the dimension of the inner iron core 50 differs in the brakes from which size differs, the electromagnetic coil 30 can be formed using the same division | segmentation bobbin 10. FIG. Accordingly, since it is not necessary to manufacture various types of bobbins, only the mold of one divided bobbin 10 needs to be manufactured, and the manufacturing cost and manufacturing man-hour of the mold can be reduced. Further, by using the divided bobbin 10, the size of the mold can be made smaller than that of the conventional bobbin, the molding distortion generated in the molded product is reduced, and the coil is wound when the coil is wound around the bobbin. Alignment can be improved.

In the first embodiment, the protrusions a are provided above and below the opening of the recess A of the divided bobbin 10 and the grooves b are provided on both the upper surface and the lower surface of the inner iron core 50. However, the present invention is not limited to this. For example, the protrusion a may be provided on one of the upper and lower sides of the opening of the recess A, and the groove b may be provided on one of the upper surface and the lower surface of the inner iron core 50, or the groove b may be provided on the divided bobbin 10. Protruding part a may be provided on the inner iron core 50. In the first embodiment, the protrusion a of the divided bobbin 10 is linearly formed along the end portions of the top plate 11 and the bottom plate 12, but the present invention is not limited to this. For example, the protruding portion a may be a plurality of convex portions formed intermittently along the end portions of the top plate 11 and the bottom plate 12. When the protrusion a is a plurality of protrusions formed intermittently, the groove b of the inner iron core 50 may be a plurality of recesses formed intermittently.

In the first embodiment, the divided bobbin 10 is attached to the four corners B of the inner iron core 50. However, the present invention is not limited to this. For example, the versatility is low, but two divided bobbins having a shape that combines two divided bobbins 10 according to the first embodiment are divided into two corners B out of four corners B. You may make it the shape which attaches one division | segmentation bobbin. Further, the divided bobbin 10 according to the first embodiment may be further divided into upper and lower parts, and divided bobbins may be attached to the upper and lower parts of the four corners B as eight divided bobbins to constitute the inner iron core 20 with the bobbin. By dividing into eight parts, the inner iron cores 50 having different heights can be handled with one kind of divided bobbin. In addition, when attaching the divided | segmented bobbin of 8 divisions to the inner side iron core 50, the protrusion part a of a division | segmentation bobbin is provided along the side wall of the opening part of the recessed part A, and the groove part b of the inner side iron core 50 is provided on both sides of the corner | angular part B. The split bobbin may be fixed to the inner iron core 50 by appropriately changing or adding the shape and position of the protrusion and the groove, such as by providing on the surface. In the first embodiment, the four divided bobbins 10 have the same shape, but the present invention is not limited to this. For example, you may make it use combining the division | segmentation bobbin of a different shape which makes a pair on right and left.

Furthermore, in Embodiment 1, although the groove part b was formed in the center side edge part of the step part 50a in the inner side iron core 50, it is not restricted to this. For example, as shown in FIG. 11, the stepped portion 50a is formed as an inclined surface 50b in which the thickness of the inner iron core 50 becomes thinner toward the inner side of the inner iron core 50, and the divided bobbin 10 and the inner iron core 50 are formed with the protrusion a. The engagement with the inclined surface 50b may be achieved by friction. In this case, instead of the protrusion a of the divided bobbin 10, the upper surface and the lower surface inside the recess A are inclined surfaces following the inclined surface 50b, and the friction between the upper surface and the lower surface inside the recess A and the inclined surface 50b is caused. It may be engaged.

Next, a procedure for manufacturing the electromagnet 3 will be described.
First, the inner iron core 50 constituting the electromagnet 3 and the four divided bobbins 10 are prepared.
Next, the stepped portion 50a at one corner B of the inner iron core 50 is covered with the recess A of one divided bobbin 10 while elastically deforming the opening of the recess A.
Next, the divided bobbins 10 are pushed in and fixed until the protrusions a provided on the upper and lower sides of the recess A are fitted into the grooves b provided on the upper and lower step portions 50 a of the inner iron core 50.
Next, the remaining three divided bobbins 10 are sequentially pushed into and fixed to the step portions 50a at the three remaining corners B of the inner iron core 50 to form the inner iron core 20 with a bobbin.
Next, the bobbin-equipped inner iron core 20 is set on the winding machine, the coil 60 is wound, and the electromagnetic coil 30 is formed.
Next, the electromagnetic coil 30 is fixed to the concave portion C of the outer iron core 40 using an adhesive or the like.
Thus, the electromagnet 3 is completed.

As described above, the inner iron core 50 and the outer iron core 40 of the electromagnet 3 are separated, and the four divided bobbins 10 are attached to the four corners B of the inner iron core 50 to form the inner iron core 20 with a bobbin. By creating the electromagnetic coil 30 by setting the inner iron core 20 in a winding machine, the electromagnetic coil 30 can be used without using the winding core 110, the upper winding frame 120, and the lower winding frame 130 as shown in FIG. Thus, the number of manufacturing steps of the electromagnet 3 can be reduced, and the working time can be shortened.

2 brake device, 3 electromagnet, 10 split bobbin, 11 top plate, 12 bottom plate, 13 side plate, 20 bobbin inner iron core, 30 electromagnetic coil, 40 outer iron core, 50 inner iron core, 50a step, 50b inclined surface, 60 coil, a protrusion (fitting part), b groove (fitting part), A recess, B corner, C recess.

Claims

An inner core formed in a shape similar to a rectangular parallelepiped,
A plurality of divided bobbins attached to corners of the inner core;
And a coil wound around the inner iron core to which the plurality of divided bobbins are attached,
An electromagnetic coil having
An electromagnet comprising a recess at a central portion and an outer iron core on which the electromagnetic coil is fixed to the recess.
Each of the plurality of divided bobbins is
With the top plate,
The bottom plate,
The electromagnet according to claim 1, further comprising a side plate that connects the top plate and the bottom plate.
The electromagnet according to claim 2, wherein at least one of the top plate and the bottom plate is elastically deformed.
A groove is formed in the corner of the inner iron core,
The electromagnet according to claim 1, wherein the divided bobbin includes a protrusion that engages with the groove.
The corner portion of the inner iron core has an inclined surface in which the thickness of the inner iron core decreases as it goes to the inner side of the inner iron core,
The electromagnet according to claim 1, wherein the divided bobbin includes a protrusion that engages with the inclined surface by friction.
Attaching a split bobbin to a corner of the inner iron core having a shape similar to a rectangular parallelepiped;
Forming an electromagnetic coil by winding a coil around the inner iron core to which the divided bobbin is attached;
And a step of fixing the electromagnetic coil in a recess provided in a central portion of the outer iron core.