JPH0682819U - Magnetizing device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To manufacture magnetic gears with different diameters and pole numbers with a single magnetizing device. [Structure] A plurality of protrusions 10 are formed at equal intervals on the inner peripheral surface of a magnetizing yoke 9. The first conductor wire, the second conductor wire, and the third conductor wire are wound around the protrusion 10 in multiple stages with one protrusion, two protrusions, and three protrusions as one unit.
The windings of adjacent units made of the same conductor are set to have opposite winding directions. An adapter 16 having a thickness of the gap width is fitted into the gap between the tip surface of the protrusion 10 and the magnetic body 15 arranged between the protrusions 10. At the time of magnetization, one of the conducting wires is selected and a pulse current is applied.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a magnetizing device for producing a magnetic gear, for example, by subjecting a columnar magnetic material to multi-pole magnetization.

[0002]

[Prior art]

 Generally, when manufacturing a magnetic gear or the like capable of transmitting rotation in a non-contact manner, the most important thing is to magnetize a magnetic body. An example of a magnetizing device for magnetizing the magnetic body will be described with reference to FIG. The magnetizing device 1 shown in FIG. 3 has a mechanism for magnetizing the side surface of a cylindrical magnetic body, and a plurality of protrusions corresponding to the magnetized shape are formed on the inner peripheral surface of the cylindrical magnetizing yoke 2. The parts 3 are arranged at equal intervals with the groove 4 sandwiched therebetween, and the conductors 5 are wound around the respective protruding parts 3. In this case, the conducting wire 5 is set such that its winding direction is reversed between the adjacent protrusions 3 and 3. Further, a columnar magnetic body 6 is concentrically arranged on the tip end side of each protrusion 3 in the vicinity of the tip of the protrusion 3.

When the outer peripheral surface of the cylindrical magnetic body 6 is magnetized in multiple poles, a pulse current of an appropriate magnitude is applied to the conductor wire 5 so that the protrusions 3 and 3 are adjacent to each other. Magnetic flux is generated and multi-pole magnetization is applied. In this way, as shown in FIG. 4, the S pole and the N pole are alternately magnetized on the outer peripheral surface of the cylindrical magnetic body 6. The central shaft hole is for fitting the rotary shaft.

[0004]

[Problems to be solved by the device]

 By the way, in such a conventional magnetizing device 1, it is necessary to design so that no gap is created between the protrusion 3 of the magnetizing yoke 2 and the magnetic body 6, but on the other hand, the diameter of the magnetic gear varies. Therefore, it is necessary to manufacture and arrange a plurality of magnetizing yokes 2 each having an inner diameter between the protrusions 3 having a size corresponding to the outer diameter of each magnetic body. Further, since the number of poles required for the magnetic gear varies, it is necessary to arrange a plurality of magnetizing yokes 2 having different numbers of protrusions 3 in order to cope with this. Therefore, it is necessary to prepare magnetizing yokes 2 having different numbers of inner diameters between the protrusions 3 that have different numbers of protrusions 3, and the magnetizing yokes 2 corresponding to the actual diameter and the number of poles of the magnetic gear, respectively. is necessary. This is not only complicated because the number of magnetizing devices 1 is too large, but also has a drawback that the manufacturing cost is significantly increased.

In view of such circumstances, an object of the present invention is to provide a magnetizing device capable of magnetizing a plurality of types of magnetic bodies having different outer diameters and pole numbers with a single magnetizing yoke. And

[0006]

[Means for Solving the Problems]

 A magnetizing device according to the present invention is a magnetizing device comprising a magnetizing yoke having a plurality of protrusions and a conductor wire wound around the protrusion, wherein the conductor has a single protrusion and a plurality of protrusions, respectively. It is characterized by being wound in multiple stages as a unit.

Further, in a magnetizing device provided with a magnetizing yoke having a plurality of protrusions and a conductive wire wound around the protrusions, a magnetic body disposed between the protrusions It is characterized in that an adapter having a thickness corresponding to the gap width is inserted into the gap between them.

Further, in a magnetizing device provided with a magnetizing yoke having a plurality of protrusions and a conductor wire wound around the protrusions, the conductor wire includes a single unit and a plurality of protrusions as one unit. It is characterized in that an adapter having a thickness corresponding to the gap width is inserted into the gap between the protrusions and the magnetic body arranged between the protrusions. It is a thing.

Further, the adapter is characterized by having a cylindrical shape in which members having high magnetic permeability facing the protrusions and non-magnetic members located between the protrusions are alternately arranged.

[0010]

[Action]

 Depending on the number of poles to be magnetized in the magnetic body, one of the conducting wires wound in a plurality of stages is selected and a pulse current is passed therethrough, so that the required number of poles is magnetized in the magnetic body.

When a magnetic body having a required diameter is placed in the magnetizing yoke, if there is a gap between the protrusion and the outer diameter of the magnetic body, an adapter having a thickness equivalent to the gap can be inserted. , You can eliminate the gap.

For a magnetic body having an appropriate diameter and an appropriate number of magnetic poles to be magnetized, when the magnetic body is arranged in the magnetizing yoke, if there is a gap between the protrusion and the outer diameter of the magnetic body. , By inserting an adapter with the same thickness as the gap, selecting one of the conductors wound in multiple stages and passing a pulse current in this state, the required number of magnetic poles are magnetized to the magnetic body.

[0013]

【Example】

 Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a plan view of a magnetizing yoke of a magnetizing device according to an embodiment, and FIG. 2 is an axially exploded perspective view of a magnetizing device with a conductor omitted and a magnetic body. In the magnetizing device 8 shown in the figure, an appropriate number (12 in the embodiment) of protrusions 10 corresponding to the magnetized shape are formed on the inner peripheral surface of the cylindrical magnetized yoke 9 with the groove 11 interposed therebetween. They are arranged at intervals. The innermost part 11a of the groove 11 has a circular shape so that a plurality of conducting wires wound around the respective protrusions 3 can be positioned.

That is, the first conducting wire 12 shown by a solid line is wound for each individual protruding portion 10 in units of one protruding portion 10, and the conducting wires 12, 1 wound around the adjacent protruding portions 10, 10 are wound. The winding direction of 2 is set to the opposite. Further, the second conducting wire 13 shown by the one-dot chain line is wound integrally with the two protruding portions 10, 10 as a unit, and the winding directions of the conducting wires 13, 13 for each adjacent unit are opposite. . The third conducting wire 14 shown by the chain double-dashed line is wound integrally with the continuous three projecting portions 10 as a unit, and the conducting wires 14, 14 of each adjacent unit are set to have opposite winding directions. Has been done. In FIG. 1, each winding is not shown every other unit. In this way, each conductor 12, 13, 14 is wound in multiple stages. Therefore, by selectively applying a pulse current to each of the first conductor wire 12, the second conductor wire 13, and the third conductor wire 14, the magnetic poles of 12 poles, 6 poles, and 4 poles are magnetized to the magnetic body. It will be.

Further, in FIG. 2, when a magnetic substance 15 is concentrically arranged between the tip surfaces of the protrusions 10 of the magnetizing yoke 9 for magnetization, and when a gap exists between the two, A cylindrical adapter 16 having a thickness corresponding to a gap is inserted. This adapter 16 includes a magnetically permeable member (pure iron) 17 having a width corresponding to the tip end surface of the protrusion 10 and having the highest magnetic permeability, and a non-magnetic member 18 having a width corresponding to the open end of the groove 11. And are extended in the axial direction and arranged alternately. Moreover, the adapter 16 has several thicknesses (inner diameters) depending on the difference between the preset inner diameter of the tip surface of the protrusion 10 and the various inner diameters of the magnetic bodies 15 constituting the various magnetic gears. The things to be done shall be manufactured in advance.

Since this embodiment is configured as described above, when magnetizing a magnetic body to manufacture a magnetic gear, the magnetic body 15 having a required outer diameter is selected and the magnetizing yoke 9 is used. The protrusions 10 are arranged concentrically within the inner diameter formed by the tip surface. In this state, when there is a gap between the front end surface of the protrusion 10 and the magnetic body 15, the adapter 16 having an inner diameter having a thickness corresponding to the gap width is selected and fitted between the two. At this time, the adapter 16 is positioned so that the magnetically permeable member 17 of the adapter 16 corresponds to the tip surface of the protrusion 10.

In this state, if any one kind of conducting wires 12, 13, 14 which are wound in multiple stages is selected according to the number of poles to be magnetized and a pulse current is applied, the protrusion 10 is formed for each unit. The flowing magnetic flux is determined, and the required number of magnetic poles are magnetized to the magnetic body 15. In this way, a magnetic toothed wheel having the required number of poles and outer diameter can be manufactured using the single magnetizing device 8.

As described above, according to the present embodiment, it is possible to magnetize an appropriate number of poles to the magnetic body 15 having an appropriate diameter by using the single magnetizing device 8, and the diameter of the magnetic gear It is not necessary to prepare a separate magnetizing device according to the number of poles, which facilitates manufacturing and reduces the manufacturing cost.

In the above description, the conductor wire wound in multiple stages is set to three types, but the number of stages is not limited to this, and the number of stages of an appropriate type may be set according to the number of the protrusions 10 formed on the magnetizing yoke 9. Can be wrapped around. Further, when one pole is magnetized by a plurality of adjacent protrusions 10, the plurality of protrusions 10 are collectively wound with a conductive wire in the above-mentioned embodiment. The parts 10 may be individually and in the same winding direction, and may be wound as a unit.

[0020]

[Effect of device]

 As described above, in the magnetizing device according to the present invention, the conductor wire is wound in a plurality of steps with the single and the plurality of protrusions as a unit, respectively. It is possible to magnetize the number of poles of the seed, which facilitates the manufacturing thereof and reduces the manufacturing cost. Further, in the magnetizing device according to the present invention, the adapter having the thickness corresponding to the gap width is inserted into the gap between the protrusion and the magnetic body, so that a single magnetizing yoke has different outer diameters. It is possible to magnetize the magnetic substance having the above, which facilitates the production thereof and reduces the production cost. Further, in the magnetizing device according to the present invention, the conductor wire is wound in a plurality of stages, and the adapter having the thickness corresponding to the gap width is fitted between the protrusion and the magnetic body. By using one magnetizing yoke, it is possible to magnetize a plurality of types of poles on magnetic bodies having different diameters, which simplifies and facilitates manufacturing and also makes it possible to reduce the manufacturing cost.

[Brief description of drawings]

FIG. 1 is a plan view of an essential part of a magnetizing device according to an embodiment of the present invention.

FIG. 2 is an axially exploded perspective view of a magnetic body provided in the embodiment of FIG.

FIG. 3 is a schematic plan view of a conventional magnetizing device.

FIG. 4 is a perspective view of a magnetized magnetic gear.

[Explanation of symbols]

 8 Magnetizing Device 9 Magnetizing Yoke 10 Projection 12 First Conductive Wire 13 Second Conductive Wire 14 Third Conductive Wire 15 Magnetic Material 16 Adapter 17 Magnetically permeable Member 18 Non-magnetically permeable Member

Claims (4)

[Scope of utility model registration request] 1. A magnetizing device comprising a magnetizing yoke having a plurality of protrusions and a conductor wire wound around the protrusions, wherein the conductor comprises a single unit and a plurality of protrusions, respectively. A magnetizing device characterized by being wound as a plurality of layers. 2. A magnetizing device provided with a magnetizing yoke having a plurality of protrusions and a conductive wire wound around the protrusions, the magnetic body being disposed between the protrusions. A magnetizing device, characterized in that an adapter having a thickness corresponding to the gap width is inserted into a gap between the magnetizing device and the magnetizing device. 3. A magnetizing device provided with a magnetizing yoke having a plurality of protrusions and a conductor wire wound around the protrusions, wherein the conductor has a single unit and a plurality of protrusions, respectively. As a result, the adapter having a thickness corresponding to the gap width is inserted into the gap between the protrusion and the magnetic body arranged between the protrusions. A magnetizing device characterized in that 4. The adapter has a cylindrical shape in which a member having a high magnetic permeability facing the protrusion and a non-magnetic member located between the protrusions are alternately arranged. The magnetizing device according to item 3.