KR102549738B1 - Method for manufacturing Pole piece and inner rotor for magnetic gear - Google Patents

Abstract

In the method of manufacturing a pole piece for magnetic gear according to an embodiment of the present invention, an annular cylindrical intermediate portion having an inner circumferential surface in contact with the inner rotor and an outer circumferential surface in contact with the outer rotor is prepared while being interposed between the inner rotor and the outer rotor. A first step of doing, a second step of forming a plurality of mounting holes and a plurality of fastening holes penetrating the upper and lower surfaces of the intermediate part, a third step of preparing a plurality of magnet parts formed in a shape corresponding to the mounting hole, the plurality of A fourth step of inserting the magnet part into each of the mounting holes, a fifth step of preparing a metal cap covering the upper and lower surfaces of the intermediate part, a sixth step of covering the upper and lower surfaces of the intermediate part with the metal cap, fastening A seventh step of preparing a plurality of resin bolts formed in a shape corresponding to the hole and an eighth step of fastening the resin bolt to each of the plurality of fastening holes so that the metal cap is fixed to the intermediate part, The intermediate part may be formed of a non-ferrous material.

Description

Method for manufacturing Pole piece and inner rotor for magnetic gear {Method for manufacturing Pole piece and inner rotor for magnetic gear}

The present invention relates to a pole piece for a magnetic gear and a method for manufacturing an inner rotor, and more particularly, an inner rotor part formed by coupling a plurality of permanent magnets to the outer circumferential surface of a shaft, and a plurality of permanent magnets formed coaxially with the inner rotor on the inner circumferential surface of a shaft. The present invention relates to a method for manufacturing a pole piece of a magnetic gear and an inner rotor comprising an outer rotor formed by being coupled and a pole piece for a magnetic gear disposed between the inner rotor and the outer rotor to adjust magnetic flux.

In general, a magnetic gear is a non-contact gear device that transmits power in a non-contact way using magnetic force, unlike contact gears that transmit power by physical contact. It is a gear device with excellent stability and durability because it does not require maintenance or inspection, and there is no mechanical friction.

Furthermore, since the magnetic gear can reduce energy loss, it is a gear device capable of high-efficiency driving and accurate transmission of peak torque compared to contact gears.

In addition, the conventional magnetic gear can be configured in various ways as long as it is configured using a magnetic method. As an example, the inner rotor and the outer rotor to which the permanent magnets are coupled, and the magnetic material are installed at regular intervals and are located between the inner rotor and the outer rotor. It may be configured to include a pole piece that induces rotation of the other through rotation according to the input rotation of any one of the inner rotor and the outer rotor by adjusting the magnetic flux.

Korean Patent Registration No. 10-1457523

An object of the present invention is to provide a pole piece for magnetic gear, which is formed of non-ferrous metal and can minimize interference due to magnetic force.

Another object of the present invention is to provide an inner rotor that prevents the magnet from being separated from the main body by the rotational force of the inner rotor rotating at high speed by increasing the coupling force between the main body (frame) of the inner rotor for magnetic gear and the magnet.

A method for manufacturing a pole piece for magnetic gear according to an embodiment of the present invention includes an inner rotor portion formed by coupling a plurality of permanent magnets to the outer circumferential surface of a shaft, and a plurality of permanent magnets coupled to the inner circumferential surface coaxially with the inner rotor. A method for manufacturing a pole piece for a magnetic gear of a magnetic gear composed of an outer rotor formed and a pole piece for a magnetic gear disposed between the inner rotor and the outer rotor to adjust magnetic flux, wherein the gap between the inner rotor and the outer rotor A first step of preparing an annular cylindrical intermediate portion having an inner circumferential surface in contact with the inner rotor and an outer circumferential surface in contact with the outer rotor while interposed therebetween, a plurality of mounting holes and a plurality of fastening holes penetrating the upper and lower surfaces of the intermediate portion. A second step of forming, a third step of preparing a plurality of first magnet parts formed in a shape corresponding to the mounting hole, a fourth step of inserting the first magnet part into each of the plurality of mounting holes, the upper surface of the intermediate part, and A fifth step of preparing a metal cap covering the lower surface, a sixth step of covering the upper and lower surfaces of the intermediate portion with the metal cap, a seventh step of preparing a plurality of resin bolts formed in a shape corresponding to the fastening hole, and the above An eighth step of fastening the resin bolt to each of the plurality of fastening holes so that the metal cap is fixed to the intermediate portion, and the intermediate portion may be formed of a non-ferrous material.

The fourth step of the method of manufacturing a pole piece for magnetic gear according to an embodiment of the present invention includes a 4-1 step of applying an adhesive liquid to the inside of each of the plurality of mounting holes, each of the plurality of first magnet parts. The 4-2 step of applying the adhesive to the outer surface of the 4-3 step of inserting the first magnet into each mounting hole where the adhesive is applied, and the adhesive between the mounting hole and the first magnet is hardened A 4-4 step of fixing the first magnet part in the mounting hole, and the 8-1 step of applying an adhesive liquid to the inside of each of the plurality of fastening holes, the plurality of resin bolts Step 8-2 of applying adhesive liquid to each outer surface, Step 8-3 of inserting a resin bolt into each fastening hole to which the adhesive liquid is applied, and the adhesive liquid between the fastening hole and the resin bolt is cured to form a resin bolt It may include an 8-4th step of allowing the to be settled in the fastening hole.

In the fifth step of the method of manufacturing a pole piece for a magnetic gear according to an embodiment of the present invention, an upper metal cap formed in an annular shape corresponding to the upper surface of the intermediate portion and having a plurality of first through holes is prepared. A 5-1 step of doing and a 5-2 step of preparing a lower metal cap formed in an annular shape corresponding to the lower surface of the intermediate portion and having a plurality of second through holes passing therethrough, the 6th step , Step 6-1 of applying adhesive to one surface of the upper metal cap, Step 6-2 of applying adhesive to one surface of the lower metal cap, one surface of the upper metal cap coated with adhesive A 6-3 step in which the upper metal cap is fixed to the upper side of the intermediate portion by curing while being in contact with the upper surface of the intermediate portion, and one side of the lower metal cap coated with the adhesive liquid is in contact with the lower surface of the intermediate portion , and a 6-4 step of curing the lower metal cap to be fixed to the lower side of the intermediate part.

Step 5-1 of the method for manufacturing a pole piece for magnetic gear according to an embodiment of the present invention includes the step 5-1-1 of forming a first annular portion having a shape corresponding to the upper surface of the intermediate portion and the first An inner edge of the annular portion is bent to form a 1-1 bent portion, and an outer edge of the first annular portion is bent to form a 1-2 bent portion, and the first annular portion, the 1-1 bent portion, and the A 5-1-2 step of forming the upper metal cap by forming a first mounting groove defined by the 1-2 bent portion, wherein the 5-2 step corresponds to the lower surface of the intermediate portion Step 5-2-1 of forming the second annular portion of the shape, bending the inner edge of the second annular portion to form a 2-1 bent portion, and bending the outer edge of the second annular portion to form the 2-2nd bent portion A 5-2-2 step of forming the lower metal cap by forming a portion and forming a second mounting groove defined by the second annular portion, the 2-1 bent portion, and the 2-2 bent portion. In the step 6-3, the upper surface of the intermediate portion is in contact with the first annular portion while the upper side of the intermediate portion is inserted into the first mounting groove, so that the upper metal cap is placed on the upper portion of the intermediate portion. In step 6-4, while the lower side of the intermediate portion is inserted into the second mounting groove, the lower surface of the intermediate portion is in contact with the second annular portion so that the lower metal cap is attached to the intermediate portion. It can be fixed on the lower side.

In the method of manufacturing an inner rotor for magnetic gear according to an embodiment of the present invention, an inner rotor formed by coupling a plurality of permanent magnets to the outer circumferential surface of a shaft, and a plurality of permanent magnets coupled to the inner circumferential surface coaxially with the inner rotor are formed. A method for manufacturing an inner rotor of a magnetic gear composed of an outer rotor and a pole piece for magnetic gear disposed between the inner rotor and the outer rotor to adjust magnetic flux, wherein the inner circumferential surface is connected to the shaft, and the outer circumferential surface is connected to a plurality of A first step of preparing an annular cylindrical rotor body to which permanent magnets are connected, a second step of forming a plurality of recessed parts along the outer circumferential surface of the rotor body, and a second step of preparing the same number of second magnet parts as the number of recessed parts. Step 3, a fourth step of forming a protrusion having a shape corresponding to the shape of the recessed part in each of the plurality of second magnet parts, and a plurality of second magnets on the rotor body by mounting the second magnet part in each of the plurality of recessed parts And a fifth step of fixing the portion, wherein the recessed portion gradually expands the width of the groove from the outer circumferential surface of the rotor body toward the inside in the radial direction, and the protrusion of the second magnet portion corresponds to the shape of the recessed portion. It is formed in a shape, and when mounted in the recessed portion, positional movement in the radial direction can be limited.

The fifth step of the method of manufacturing an inner rotor for magnetic gear according to an embodiment of the present invention includes a 5-1 step of applying an adhesive liquid to each of the plurality of indentations, and a projection of each of the plurality of second magnet parts. In the 5-2 step of applying the adhesive liquid to the rotor body, the adhesive liquid is cured while the protrusions of the second magnet part are attached to each of the plurality of indentations to which the adhesive liquid is applied. A 5-3 step for fixing may be included.

The second step of the method of manufacturing an inner rotor for a magnetic gear according to an embodiment of the present invention further includes a 2-1 step of forming a protruding portion protruding from an inner circumferential surface of the rotor body, wherein the shaft includes the rotor It is mounted in the inner space formed by the inner circumferential surface of the body, and an interlocking groove formed by being recessed from the outer circumferential surface is engaged with the protrusion, and the rotor body is interlocked with the rotation of the shaft according to the engagement of the protrusion with the interlocking groove. can

According to the present invention, since the pole piece for the magnetic gear is formed of a non-ferrous metal, interference caused by magnetic force can be minimized, thereby preventing performance deterioration of the magnetic gear.

In addition, it is possible to prevent the magnet from being separated from the main body by the rotational force of the inner rotor rotating at high speed by increasing the coupling force between the main body (frame) of the inner rotor for magnetic gear and the magnet.

1 is a schematic diagram showing a magnetic gear;
2 and 3 are schematic diagrams for explaining a pole piece manufactured by a method for manufacturing a pole piece for a magnetic gear according to an embodiment of the present invention.
4 is a flowchart illustrating a method of manufacturing a pole piece for a magnetic gear according to an embodiment of the present invention.
5 to 7 are schematic diagrams for explaining an inner rotor manufactured by a method for manufacturing an inner rotor for a magnetic gear according to an embodiment of the present invention.
8 is a flowchart illustrating a method of manufacturing an inner rotor for a magnetic gear according to an embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. However, the spirit of the present invention is not limited to the presented embodiments, and those skilled in the art who understand the spirit of the present invention may add, change, delete, etc. other elements within the scope of the same spirit, through other degenerative inventions or the present invention. Other embodiments included within the scope of the inventive idea can be easily proposed, but it will also be said to be included within the scope of the inventive concept.

In addition, components having the same function within the scope of the same idea appearing in the drawings of each embodiment are described using the same reference numerals.

1 is a schematic diagram showing a magnetic gear, and FIGS. 2 and 3 are schematic diagrams for explaining a pole piece manufactured by a method for manufacturing a pole piece for a magnetic gear according to an embodiment of the present invention.

4 is a flowchart illustrating a method of manufacturing a pole piece for a magnetic gear according to an embodiment of the present invention.

1 to 4, a method for manufacturing a pole piece for a magnetic gear (hereinafter, a method for manufacturing a pole piece) according to an embodiment of the present invention is a method for manufacturing a pole piece 10 embedded in a magnetic gear 1. am.

Here, the magnetic gear 1 is coaxial with the inner rotor 20 formed by coupling a plurality of permanent magnets to the outer circumferential surface of the shaft 40 connected to the motor, and a plurality of permanent magnets on the inner circumferential surface. It consists of an outer rotor 30 formed by combining magnets and a pole piece 10 for magnetic gear disposed between the inner rotor 20 and the outer rotor 30 to adjust magnetic flux.

The pole piece manufacturing method of the present invention includes the first step (S1) to the eighth step (S8).

In the first step (S1), while being interposed between the inner rotor 20 and the outer rotor 30, the inner circumferential surface is in contact with the inner rotor 20 and the outer circumferential surface is in contact with the outer rotor 30. This is a step of preparing the cylindrical intermediate portion 11.

The intermediate portion 11 has a cylindrical shape formed with a through hole along the axial direction, and has an outer circumferential surface in an outward direction and an inner circumferential surface in an inward direction on the side surface, and an annular flat surface on the upper and lower surfaces.

The outer circumferential surface of the intermediate portion 11 faces the magnet of the outer rotor 30, and the inner circumferential surface faces the magnet of the inner rotor 20.

The intermediate part 11 may be formed of a non-ferrous material. This is, when interacting with the magnet of the outer rotor 30 or the magnet of the inner rotor 20 of the first magnet part 13, which will be described later, mounted on the intermediate part 11, to the intermediate part 11 This is to minimize the magnetic interference caused by the gear, so that the performance of the gear is more accurate.

Specifically, if the intermediate part 11 is metallic, not of non-ferrous material, when the magnet of the outer rotor 30 or the magnet of the inner rotor 20 interacts with the first magnet part 13, Although the magnetic force may be disturbed or disturbed by the metallic material disposed in the middle, gear operation outside of a predetermined value may be caused.

The second step (S2) is a step of forming a plurality of mounting holes 111 and a plurality of fastening holes 113 penetrating the upper and lower surfaces of the intermediate part 11.

Here, in the second step (S2), since breakage such as splitting may occur during hole processing depending on the characteristics (non-ferrous material) caused by the material of the intermediate part 11, after manufacturing a plurality of intermediate pieces separately, It is possible to manufacture the intermediate portion 11 having a predetermined height by stacking.

The plurality of mounting holes 111 formed in the intermediate part 11 provide a space in which the first magnet part 13 to be described later is inserted and mounted, and the plurality of fastening holes 113 are metal caps to be described later ( 15) and the intermediate portion 11 to provide a space in which the resin bolt 17 is fastened.

The third step (S3) is a step of preparing a plurality of first magnet parts 13 formed in a shape corresponding to the mounting hole 111.

The first magnet part 13 may be formed in a number corresponding to the number of mounting holes 111 formed in the intermediate part 11 .

A fourth step (S4) is a step of inserting the first magnet part 13 into each of the plurality of mounting holes 111.

The fourth step S4 may include steps 4-1 through 4-4.

Step 4-1 is a step of applying adhesive to the inside of each of the plurality of mounting holes 111, and step 4-2 is to apply adhesive to the outer surface of each of the plurality of first magnet parts 13. This is the step of dispensing.

Step 4-3 is a step of inserting the first magnet part 13 into each mounting hole 111 to which the adhesive liquid is applied.

At this time, step 4-3 may be implemented before the adhesive liquid applied to the plurality of mounting holes 111 and the plurality of first magnet parts 13 is hardened.

Step 4-4 is a step in which the adhesive between the mounting hole 111 and the first magnet part 13 is hardened so that the first magnet part 13 is settled in the mounting hole 111 .

A fifth step (S5) is a step of preparing a metal cap 15 covering the upper and lower surfaces of the intermediate portion 11.

In the fifth step (S5), the upper metal cap 151 is formed in an annular shape corresponding to the upper surface of the intermediate portion 11 and is formed by passing a plurality of first through holes 151d. Step 1 and Step 5-2 of preparing a lower metal cap 152 formed in an annular shape corresponding to the lower surface of the intermediate portion 11 and having a plurality of second through holes 152d penetrating therethrough .

Here, the plurality of first through holes 151d formed in the upper metal cap 151 may be formed in a shape and number corresponding to the plurality of fastening holes 113 of the intermediate part 11 . In addition, the plurality of second through holes 152d formed in the lower metal cap 152 may be formed in a shape and number corresponding to the plurality of fastening holes 113 of the intermediate part 11 .

Step 5-1 includes steps 5-1-1 and 5-1-2.

Step 5-1-1 is a step of forming the first annular portion 151a having a shape corresponding to the upper surface of the intermediate portion 11.

Step 5-1-2 is to form the 1-1 bent portion 151b by bending the inner rim of the first annular portion 151a, and bend the outer rim of the first annular portion 151a. A 1-2 bent portion 151c is formed, and the first attachment defined by the first annular portion 151a, the 1-1 bent portion 151b and the 1-2 bent portion 151c is formed. This step is to form the upper metal cap 151 by forming a groove.

Here, when the upper metal cap 151 is mounted on the intermediate portion 11, the first annular portion 151a is in contact with the upper surface of the intermediate portion 11, and the 1-1 bent portion 151b ) and the 1-2nd bent portion 151c are in contact with the outer and inner circumferential surfaces of the intermediate portion 11, respectively.

Step 5-2 includes steps 5-2-1 and 5-2-2.

Step 5-2-1 is a step of forming the second annular portion 152a having a shape corresponding to the lower surface of the intermediate portion 11.

In step 5-2-2, the inner edge of the second annular portion 152a is bent to form the 2-1 bent portion 152b, and the outer edge of the second annular portion 152a is bent. The second mounting defined by the second annular portion 152a, the 2-1 bent portion 152b and the 2-2 bent portion 152c by forming a 2-2 bent portion 152c. This step is to form the lower metal cap 152 by forming a groove.

Here, when the lower metal cap 152 is mounted on the intermediate portion 11, the second annular portion 152a is in contact with the lower surface of the intermediate portion 11, and the 2-1 bent portion 152b ) and the 2-2nd bent portion 152c are in contact with the outer and inner circumferential surfaces of the intermediate portion 11, respectively.

The sixth step (S6) is a step of covering the upper and lower surfaces of the intermediate portion 11 with the metal cap 15.

The sixth step (S6) may include steps 6-1 to 6-4.

Step 6-1 is a step of applying an adhesive liquid to one surface of the upper metal cap 151.

Specifically, in step 6-1, the first annular portion 151a defining the first mounting groove of the upper metal cap 151, the 1-1st bent portion 151b and the 1-2nd bent portion 151c ) is the step of applying the adhesive liquid.

Step 6-2 is a step of applying an adhesive liquid to one surface of the lower metal cap 152.

Specifically, in step 6-2, the second annular portion 152a defining the second mounting groove of the lower metal cap 152, the 2-1 bent portion 152b and the 2-2 bent portion 152c ) is the step of applying the adhesive liquid.

In step 6-3, one surface of the upper metal cap 151 to which the adhesive liquid is applied is cured while being in contact with the upper surface of the intermediate portion 11, so that the upper metal cap 151 forms the intermediate portion 11 ) to settle on the upper side of the

In step 6-3, the upper surface of the intermediate portion 11 is in contact with the first annular portion 151a while the upper side of the intermediate portion 11 is inserted into the first mounting groove, and the upper metal The cap 151 is fixed to the upper side of the medium part 11.

In step 6-4, one side of the lower metal cap 152 to which the adhesive liquid is applied is cured while being in contact with the lower surface of the intermediate portion 11, so that the lower metal cap 152 forms the intermediate portion 11 ) is a step to settle on the lower side of the

The seventh step (S7) is a step of preparing a plurality of resin bolts 17 formed in a shape corresponding to the fastening hole 113.

The resin bolt 17 is also made of a resin material that is not metallic as a way to minimize mutual magnetic interference between the above-described first magnet part 13 and the magnet of the outer rotor 30 or the magnet of the inner rotor 20. to form

The eighth step (S8) is a step of fixing the metal cap 15 to the intermediate portion 11 by fastening the resin bolt 17 to each of the plurality of fastening holes 113.

The eighth step (S8) may include steps 8-1 to 8-4.

Step 8-1 is a step of applying an adhesive liquid to the inside of each of the plurality of fastening holes 113.

At this time, the first through-hole 151d of the upper metal cap 151 fixed to the upper side of the intermediate portion 11 and the second through-hole 151d of the lower metal cap 152 fixed to the lower side of the intermediate portion 11 An adhesive liquid is also applied to the inside of the second through hole 152d.

Step 8-2 is a step of applying an adhesive liquid to the outer surface of each of the plurality of resin bolts 17.

Step 8-3 is a step of inserting the resin bolts 17 into each fastening hole 113 to which the adhesive liquid is applied.

At this time, the resin bolts 17 are the first through hole 151d of the upper metal cap 151, the fastening hole 113 of the intermediate part 11, and the second through hole of the lower metal cap 152. (152d).

Step 8-4 is a step in which the adhesive liquid between the fastening hole 113 and the resin bolt 17 is hardened so that the resin bolt 17 is fixed in the fastening hole 113.

The pole piece 10 according to an embodiment of the present invention may be manufactured by the pole piece manufacturing method described with reference to FIGS. 1 to 4 .

5 to 7 are schematic diagrams for explaining an inner rotor manufactured by a method for manufacturing an inner rotor for magnetic gear according to an embodiment of the present invention, and FIG. 8 is an inner rotor for magnetic gear according to an embodiment of the present invention. It is a flow chart for explaining the manufacturing method.

1, 5 to 8, a method for manufacturing an inner rotor for a magnetic gear according to an embodiment of the present invention (hereinafter, an inner rotor manufacturing method) includes an inner rotor 20 embedded in a magnetic gear 1. way to manufacture it.

Here, the magnetic gear 1 is coaxial with the inner rotor 20 formed by coupling a plurality of permanent magnets to the outer circumferential surface of the shaft 40 connected to the motor, and a plurality of permanent magnets on the inner circumferential surface. It consists of an outer rotor 30 formed by combining magnets and a pole piece 10 for magnetic gear disposed between the inner rotor 20 and the outer rotor 30 to adjust magnetic flux.

The inner rotor manufacturing method of the present invention includes a first step (J1) to a fifth step (J5).

The first step (J1) is a step of preparing an annular cylindrical rotor body 21 having an inner circumferential surface connected to the shaft 40 and an outer circumferential surface connected to a plurality of permanent magnets.

The rotor body 21 has a cylindrical shape with a through hole formed along an axial direction, and an outer circumferential surface is formed in an outward direction and an inner circumferential surface is formed in an inward direction on a side surface, and an annular flat surface is formed on an upper surface and a lower surface.

A second magnet part 23 to be described later is mounted on the outer circumferential surface of the rotor body 21, and a shaft 40 connected to the motor is mounted on the inner circumferential surface.

The second step (J2) is a step of forming a plurality of recessed portions 211 recessed along the outer circumferential surface of the rotor body 21.

In each recess 211 constituting the plurality of recesses 211, the width of the groove gradually expands from the outer circumferential surface of the rotor body 21 toward the inner side in the radial direction.

The third step (J3) is a step of preparing the same number of second magnet parts 23 as the number of recessed parts 211.

The fourth step (J4) is a step of forming a protrusion 231 having a shape corresponding to the shape of the recessed part 211 on each of the plurality of second magnet parts 23.

The protrusion 231 of the second magnet part 23 is formed in a shape corresponding to the shape of the recessed part 211, and when mounted in the recessed part 211, positional movement in the radial direction is limited. .

Specifically, for mounting the second magnet part 23 to the rotor body 21, the protrusion 231 extends along the recess 211 in a direction perpendicular to the radial direction, that is, the rotor body ( 21) is inserted and fastened in the direction from the upper side toward the lower side.

The protrusion 231 of the second magnet part 23 is caught in the recessed part 211 by an external force applied in the radial direction, so that separation from the rotor body 21 can be restricted.

This is to prevent the second magnet part 23 from being separated from the rotor body 21 by the centrifugal force acting in the radial direction of the rotor body 21 as the shaft 40 rotates.

The fifth step (J5) is a step of mounting the second magnet parts 23 to each of the plurality of recessed parts 211 so that the plurality of second magnet parts 23 are fixed to the rotor body 21. am.

The fifth step (J5) includes the 5-1 to 5-3 steps.

Step 5-1 is a step of applying an adhesive liquid to each of the plurality of recessed portions 211 .

Step 5-2 is a step of applying an adhesive liquid to each of the protrusions 231 of the plurality of second magnet parts 23.

In step 5-3, the adhesive liquid is hardened while the protrusion 231 of the second magnet part 23 is mounted on each of the plurality of recessed parts 211 to which the adhesive liquid is applied, and the plurality of second magnet parts (23) is a step for fixing to the rotor body 21.

Meanwhile, the second step (J2) may further include a 2-1 step of forming the protruding portion 25 protruding from the inner circumferential surface of the rotor body 21.

The shaft 40 is mounted in the inner space formed by the inner circumferential surface of the rotor body 21, and an interlocking groove 41 formed by being recessed from the outer circumferential surface (see FIG. 1(b)) is engaged with the protrusion 25. It can be.

The rotor body 21 may be interlocked with the rotation of the shaft 40 according to the engagement of the protrusion 25 with the interlocking groove 41 .

The magnetic gear 1 according to an embodiment of the present invention includes a pole piece 10 manufactured by the pole piece manufacturing method described with reference to FIGS. 1 to 4 and an inner rotor 20 described with reference to FIGS. 5 to 8 ) can be built in.

In the above, the configuration and characteristics of the present invention have been described based on the embodiments according to the present invention, but the present invention is not limited thereto, and various changes or modifications can be made within the spirit and scope of the present invention. It is apparent to those skilled in the art, and therefore such changes or modifications are intended to fall within the scope of the appended claims.

1: magnetic gear
10: Polepiece
11: medium part
13: first magnet part
15: metal cap
17: resin bolt
20: inner rotor
21: rotor body
23: second magnet part
25: protrusion
30: outer rotor
40: shaft
41: interlocking groove

Claims (7)

An inner rotor part formed by combining a plurality of permanent magnets on the outer circumferential surface of the shaft, an outer rotor formed by combining a plurality of permanent magnets on the inner circumferential surface coaxially with the inner rotor, and a magnetic flux disposed between the inner rotor and the outer rotor In the method for manufacturing a pole piece for a magnetic gear of a magnetic gear composed of a pole piece for a magnetic gear that adjusts,
A first step of preparing an annular cylindrical intermediate portion having an inner circumferential surface in contact with the inner rotor and an outer circumferential surface in contact with the outer rotor while being interposed between the inner rotor and the outer rotor;
A second step of forming a plurality of mounting holes and a plurality of fastening holes penetrating the upper and lower surfaces of the intermediate part;
A third step of preparing a plurality of first magnet parts formed in a shape corresponding to the mounting hole;
a fourth step of inserting the first magnet part into each of the plurality of mounting holes;
A fifth step of preparing a metal cap covering the upper and lower surfaces of the intermediate portion;
A sixth step of covering the upper and lower surfaces of the intermediate portion with the metal cap;
A seventh step of preparing a plurality of resin bolts formed in a shape corresponding to the fastening hole; and
And an eighth step of fastening the resin bolt to each of the plurality of fastening holes so that the metal cap is fixed to the intermediate part,
The mediator,
made of non-ferrous material,
In the fourth step,
A 4-1 step of applying an adhesive liquid to the inside of each of the plurality of mounting holes;
A 4-2 step of applying an adhesive liquid to the outer surface of each of the plurality of first magnet parts;
A 4-3 step of inserting the first magnet part into each mounting hole where the adhesive liquid is applied; and
A 4-4 step of curing the adhesive between the mounting hole and the first magnet part so that the first magnet part is settled in the mounting hole,
The eighth step,
An 8-1 step of applying an adhesive liquid to the inside of each of the plurality of fastening holes;
An 8-2 step of applying an adhesive liquid to the outer surface of each of the plurality of resin bolts;
An 8-3 step of inserting a resin bolt into each fastening hole where the adhesive liquid is applied; and
An 8-4 step of curing the adhesive between the fastening hole and the resin bolt so that the resin bolt is settled in the fastening hole,
The fifth step,
A 5-1 step of preparing an upper metal cap formed in an annular shape corresponding to the upper surface of the intermediate portion and having a plurality of first through holes passing therethrough; and
A 5-2 step of preparing a lower metal cap formed in an annular shape corresponding to the lower surface of the intermediate portion and formed by passing a plurality of second through holes,
The sixth step,
A 6-1 step of applying an adhesive liquid to one surface of the upper metal cap;
A 6-2 step of applying an adhesive liquid to one surface of the lower metal cap;
A 6-3 step of allowing one side of the upper metal cap coated with adhesive liquid to be cured while being in contact with the upper surface of the intermediate portion so that the upper metal cap is fixed to the upper side of the intermediate portion; and
A 6-4 step of allowing one surface of the lower metal cap coated with adhesive to be cured while being in contact with the lower surface of the intermediate portion so that the lower metal cap is fixed to the lower side of the intermediate portion,
In the 5-1 step,
A 5-1-1 step of forming a first annular portion having a shape corresponding to the upper surface of the intermediate portion; and
An inner edge of the first annular portion is bent to form a 1-1 bent portion, and an outer edge of the first annular portion is bent to form a 1-2 bent portion, so that the first annular portion and the 1-1 bent portion are bent. And a 5-1-2 step of forming the upper metal cap by forming a first mounting groove defined by the bent portion and the 1-2 bent portion,
In the 5-2 step,
A 5-2-1 step of forming a second annular portion having a shape corresponding to the lower surface of the intermediate portion; and
An inner edge of the second annular portion is bent to form a 2-1 bent portion, and an outer edge of the second annular portion is bent to form a 2-2 bent portion, so that the second annular portion and the 2-1 bent portion are bent. And a 5-2-2 step of forming the lower metal cap by forming a second mounting groove defined by the 2-2 bent portion,
In the 6-3 step,
While the upper side of the intermediate portion is inserted into the first mounting groove, the upper surface of the intermediate portion is in contact with the first annular portion so that the upper metal cap is fixed to the upper side of the intermediate portion,
In step 6-4,
The lower side of the intermediate portion is in contact with the second annular portion while the lower side of the intermediate portion is inserted into the second mounting groove so that the lower metal cap is fixed to the lower side of the intermediate portion. Pole piece manufacturing method.
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