KR102472646B1 - Method for manufacturing pole piece assembly, pole piece assembly and magnetic gear having the same - Google Patents

Abstract

The present invention relates to a magnetic gear, and more particularly, to a method for manufacturing a pole piece unit for a magnetic gear driven by using magnetism, a pole piece unit for a magnetic gear, and a magnetic gear having the same.
In the present invention, an inner magnetic flux portion 10 to which a plurality of first permanent magnets 11 are coupled to an outer circumferential surface, and an outer magnetic flux portion 10 to which a plurality of permanent magnets 31 are coupled to an inner circumferential surface coaxial with the inner magnetic flux portion 10 Manufacture of a pole piece unit for magnetic gear including a magnetic flux part 30 and a pole piece unit 20 positioned between the outer circumferential surface of the inner magnetic flux part 10 and the inner circumferential surface of the outer magnetic flux part 30 to adjust the magnetic flux As a method, a base material 910 having a cylindrical non-magnetic material corresponding to the shape of the pole piece unit 20 set in advance and having a hollow 911 having a gap with respect to the outer circumferential surface of the inner magnetic flux part 10 is formed , an insertion part forming step of forming a pole piece insertion part 912 so that a plurality of pole piece members 120 made of magnetic material are spaced apart at regular intervals along the circumferential direction; a pole piece member insertion step of inserting the pole piece member 120 into each of the pole piece insertion portions 912; The pole piece member fixes the pole piece members 120 to the base material 910 by combining the base material 910 and the end ring 430 at the end of the base material 910 where the pole piece member 120 is inserted. Disclosed is a pole piece unit manufacturing method comprising a fixing step.

Description

Method for manufacturing pole piece unit for magnetic gear, pole piece unit for magnetic gear and magnetic gear having the same {Method for manufacturing pole piece assembly, pole piece assembly and magnetic gear having the same}

The present invention relates to a magnetic gear, and more particularly, to a method for manufacturing a pole piece unit for a magnetic gear driven by using magnetism, a pole piece unit for a magnetic gear, and a magnetic gear having the same.

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 and inspection and does not have 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, as disclosed in Patent Document 1, the inner and outer rotors to which permanent magnets are coupled, and the magnetic body are installed at regular intervals, It may be configured to include a pole piece unit positioned between the inner rotor and the outer rotor to induce rotation of the other one through rotation according to the input rotation of either one of the inner rotor and the outer rotor by mediating magnetic flux.

Specifically, in the conventional magnetic gear, as shown in the conceptual diagrams of FIGS. 1 and 2 , the magnetic flux through the permanent magnets 11 and 31 according to the relative rotation between the inner rotor 10 and the outer rotor 30 As a device that outputs power adjusted to a desired rotational speed ratio relative to input through change induction, mediating magnetic flux between the inner rotor 10 and the outer rotor 30 and the inner rotor 10 and the outer magnetic flux part 30 For this purpose, a pole piece unit 20 fixedly installed between the inner rotor 20 and the outer rotor 30 may be included.

Here, the inner magnetic flux part 10 includes a plurality of inner permanent magnets 11 in which N poles and S poles are alternately disposed, and is rotatably installed.

In addition, the outer rotor 30 includes a plurality of outer permanent magnets 31 in which a preset number of N-poles and S-poles are alternately disposed in consideration of the rotation ratio with the inner magnetic flux part 10, and is installed to be rotatable. .

The pole piece unit 20 is fixedly installed between the inner rotor 20 and the outer rotor 30 in order to mediate the magnetic flux between the inner rotor 10 and the outer magnetic flux portion 30 .

In particular, the pole piece unit 20 must maintain a predetermined distance between the inner rotor 10 and the outer rotor 30 even in a use environment such as high-speed rotation and heat generation due to rotation to achieve precise torque output. can

However, in the case of the conventional pole piece unit, there is a problem in that the distance between the magnetic bodies is changed according to the influence of the use environment or it is separated from the initial installation position.

In addition, eddy currents are generated depending on the material of the conventional pole piece unit, and it is difficult to avoid eddy current loss.

In order to solve this problem, as in Patent Document 1, an invention for suppressing eddy current loss by configuring the number of connecting rods of the holding member as a divisor of the number of pole pairs of the rotor has been disclosed, but even in this case, the pole There is a problem in that the weight of the piece unit increases and the strength decreases.

(Patent Document 1) KR10-1457523 B1

An object of the present invention is to provide a method for manufacturing a lightweight, high-strength and stable pole piece unit for magnetic gear while maintaining the initial installation state, a pole piece unit for magnetic gear, and a magnetic gear having the same in order to solve the above problems. are doing

The present invention has been created to achieve the object of the present invention as described above, and the present invention includes an inner magnetic flux portion 10 in which a plurality of first permanent magnets 11 are coupled to an outer circumferential surface, and the inner magnetic flux portion ( 10) and an outer magnetic flux part 30 having a plurality of permanent magnets 31 coupled to the inner circumferential surface thereof, and a magnetic flux located between the outer circumferential surface of the inner magnetic flux part 10 and the inner circumferential surface of the outer magnetic flux part 30 A method of manufacturing a pole piece unit of a magnetic gear including a pole piece unit (20) for adjusting the inner magnetic flux portion (10) having a cylindrical non-magnetic material corresponding to the shape of the pole piece unit (20) set in advance. With respect to the base material 910 in which the hollow 911 having a gap is formed with respect to the outer circumferential surface of the pole piece insertion portion 912 so that a plurality of pole piece members 120 made of magnetic material are spaced apart at regular intervals along the circumferential direction An insertion part forming step of forming a; a pole piece member insertion step of inserting the pole piece member 120 into each of the pole piece insertion portions 912; The pole piece member fixes the pole piece members 120 to the base material 910 by combining the base material 910 and the end ring 430 at the end of the base material 910 where the pole piece member 120 is inserted. Disclosed is a pole piece unit manufacturing method comprising a fixing step.

In the step of forming the insertion part, the pole piece insertion part 912 is formed as a through hole along the longitudinal direction of the pole piece insertion part 912 in the base material 910, or the pole piece insertion part 912 is formed as a through hole. In the base material 910, along the longitudinal direction of the pole piece insertion part 912, one end of the base material 910 and the other end may be formed as a groove that is not open.

In the pole piece fixing step, a coupling hole 914 for coupling with the end ring 430 is formed in the base material 910, and the end ring 430 is fixed to the base material 910 by a screw 913. can be coupled to.

After the pole piece fixing step, the base member 810 for coupling with the structure may be coupled to the other end of the base material 910 opposite to the one end to which the end ring 430 is coupled.

The end ring 430 may be integrally formed with the base member 810 for coupling with a structure or may be combined with the base member 810 for coupling with a structure.

Before the insert forming step, a hollow forming step of forming the hollow 911 in the base material 910 may be performed.

The present invention also provides an inner magnetic flux portion 10 to which a plurality of first permanent magnets 11 are coupled to an outer circumferential surface, and an outer magnetic flux portion 10 to which a plurality of permanent magnets 31 are coupled to an inner circumferential surface coaxial with the inner magnetic flux portion 10. Manufacture of a pole piece unit for magnetic gear including a magnetic flux part 30 and a pole piece unit 20 positioned between the outer circumferential surface of the inner magnetic flux part 10 and the inner circumferential surface of the outer magnetic flux part 30 to adjust the magnetic flux As a method, an injection molding step of injection molding a base material 910 having a plurality of pole piece inserts 912 so that a plurality of pole piece members 120 made of magnetic material are spaced apart at regular intervals along the circumferential direction. Disclosed is a pole piece unit manufacturing method comprising the.

The pole piece insertion part 912 is formed so that at least one end thereof is open based on the base material 910, and the pole piece member 120 is inserted into each of the pole piece insertion parts 912 after the injection molding step. A step of inserting the pole piece member may be performed.

The pole piece member fixes the pole piece members 120 to the base material 910 by combining the base material 910 and the end ring 430 at the end of the base material 910 where the pole piece member 120 is inserted. A fixation step may be included.

In the injection molding step, the base material 910 may be injection molded together with the pole piece member 120 .

The pole piece member 120 includes a base member 810 and a base member 810 to maintain a state in which a plurality of pole piece members 120 made of magnetic material are spaced apart at regular intervals along the circumferential direction during injection molding of the base material 910 and installed. It may be fixed by at least one of the end rings 430 .

In the injection molding step, a plurality of pole piece members 120 made of magnetic material are fixed to the base member 810 at regular intervals along the circumferential direction, and the upper ends of the plurality of pole piece members 120 are fixed to the end ring 430. ), the base member 910 may be injection molded from the base member 810 and the end ring 430.

The base material 910 may have an engineering plastic material.

The present invention also discloses a pole piece unit of a magnetic gear manufactured by the pole piece unit manufacturing method having the above configuration.

The present invention also includes an inner magnetic flux portion 10 in which a plurality of first permanent magnets 11 are coupled to an outer circumferential surface; an outer magnetic flux part 30 coaxial with the inner magnetic flux part 10 and coupled to a plurality of permanent magnets 31 on an inner circumferential surface; A pole piece unit 20 is positioned between the outer circumferential surface of the inner magnetic flux part 10 and the inner circumferential surface of the outer magnetic flux part 30 to adjust the magnetic flux, and the pole piece unit 20 has the same configuration as described above. Disclosed is a magnetic gear, characterized in that manufactured by a pole piece unit manufacturing method having.

The base material 910 may be formed by injection or processing using an engineering plastic material.

The method of manufacturing a pole piece unit for magnetic gear according to the present invention, the pole piece unit for magnetic gear, and the magnetic gear having the same are formed by injection or processing of a base material of non-magnetic material of engineering plastic such as PEEK, and forming the base material. At the same time or by combining the pole piece member after forming the base material, there is an advantage in that productivity and mass productivity can be greatly improved due to simple manufacturing.

In particular, in constructing a pole piece unit including a pole piece member, the non-magnetic material part is manufactured by injection or processing by super engineering plastic such as PEEK, thereby greatly improving mechanical strength and simplifying manufacturing. Productivity and mass productivity can be greatly improved.

That is, the manufacturing method of the pole piece unit for magnetic gear, the pole piece unit for magnetic gear and the magnetic gear having the same according to the present invention can manufacture a pole piece unit and magnetic gear with excellent durability through a relatively simple manufacturing method. Thereby, there is an advantage of excellent economic efficiency.

1 is a side view showing a conventional magnetic gear.
2 is an exploded perspective view showing the configuration of the magnetic gear of FIG. 1;
3 is a cutaway perspective view of a part of a magnetic gear according to the present invention.
4 is an exploded perspective view in which a part of the configuration of the magnetic gear of FIG. 3 is disassembled.
FIG. 5 is a plan view showing a first embodiment of a pole piece unit constituting the magnetic gear of FIG. 3 .
Figure 6 is a perspective view showing a manufacturing process of the pole piece unit of Figure 5.
7A and 7B are cross-sectional views showing an example of a pole piece unit formed by injection molding together with an end ring or a base member, respectively.
FIG. 8 is a perspective view showing a manufacturing method of an inner skin installed on the inside of the pole piece unit shown in FIG. 7B upon ejection.

Hereinafter, a method of manufacturing a pole piece unit for magnetic gear according to the present invention, a pole piece unit for magnetic gear, and a magnetic gear having the same will be described in detail with reference to the accompanying drawings.

The magnetic gear according to the present invention has a structure similar to the magnetic gear shown in FIGS. 1 and 2, and as shown in FIGS. 3 to 5, the inner surface in which a plurality of first permanent magnets 11 are coupled to the outer circumferential surface. Magnetic flux portion 10, a plurality of second permanent magnets 31 are coupled to the inner circumferential surface of the outer magnetic flux portion 30 rotatably installed, and the outer circumferential surface of the inner magnetic flux portion 10 and the outer magnetic flux portion 30 It is located between the inner circumferential surface and includes a pole piece unit 30 for mediating magnetic flux.

The inner magnetic flux part 10 is a configuration in which a plurality of first permanent magnets 11 are coupled to an outer circumferential surface, and various configurations are possible according to a rotational or fixed structure.

For example, the inner magnetic flux part 10 has a rotatably installed structure, and is coupled to an inner core part 12 to which a plurality of pole piece units 20 are coupled to an outer circumferential surface, and to the inner core part 12. It may include an inner shaft 42 that receives rotation input or output from the outside.

The inner core part 12 has a plurality of first permanent magnets 11 coupled to an outer circumferential surface and receives rotation input or output from the outside through a coupled inner shaft, and various configurations are possible.

The inner core part 12 is hollow so that the inner shaft 42 can be coupled therethrough in the longitudinal direction, and a plurality of first permanent magnets 11 can be coupled to the outer circumferential surface.

Through this, the inner core part 12, the outer magnetic flux part 30 by the magnetic force acting through the plurality of second permanent magnets 31 installed in the outer magnetic flux part 30 and the pole piece unit 20, It may be rotated or rotated by the outer magnetic flux part 30 .

In addition, the inner core portion 12 may be made of a material such as metal or CFRP.

Here, the rotation ratio between the inner magnetic flux portion 10 and the outer magnetic flux portion described later varies depending on the size and number of permanent magnets 11 and 31 installed.

The first permanent magnet 11 is coupled to the outer circumferential surface of the inner core part 12, and the magnetic force is generated through the plurality of second permanent magnets 31 and the pole piece unit 20 installed in the outer magnetic flux part 30. As an interactive member, various configurations are possible.

For example, in the first permanent magnet 11, a plurality of N poles and S poles may be alternately arranged on the outer circumferential surface of the inner core part 12 in order, and the outer magnetic flux part 30 and the inner magnetic flux part It can be arranged with a preset number and circumferential length in consideration of the rotation ratio of (10).

In addition, the plurality of first permanent magnets 11 may be arranged at equal intervals, and more preferably may be arranged and coupled to have the same area along the outer circumferential surface of the inner core part 12 .

The inner shaft 42 passes through a hollow formed in the inner core part 12 and is coupled to the inner core part 12 to transmit the power of the inner core part 12 to the outside. It is possible.

For example, the inner shaft 42 passes through a hollow formed in the inner core part 12 and is coupled to the inner core part 12, when power is input to the inner magnetic flux part 10, the inner Power transmitted from a power source externally coupled to the shaft 42 may be transmitted to the inner core portion 12 .

Conversely, the inner shaft 42 may be rotated by a rotational force input by an outer shaft 41 to be described later.

On the other hand, the inner magnetic flux portion 10 has been described with reference to a rotatably installed embodiment, but it is of course possible to be configured in a fixed state according to a rotation combination.

The outer magnetic flux part 30 is a configuration in which a plurality of second permanent magnets 31 are coupled to an inner circumferential surface, and various configurations are possible according to a rotational or fixed structure.

For example, as an embodiment in which the outer magnetic flux part 30 is rotatably installed, the rotation ratio with the inner magnetic flux part 10 - the rotation ratio with the pole piece unit 20 when the pole piece unit 20 is rotated - It includes a plurality of second permanent magnets 31 in which a predetermined number of N poles and S poles are alternately arranged in consideration of, and is installed to be rotatable, and various configurations are possible.

For example, the outer magnetic flux part 30 has a plurality of second permanent magnets 31 coupled to the inner circumferential surface, and is coupled to the outer core part 32 installed to be rotatable and the outer core part 32 It may include an outer shaft 41 that outputs or receives rotation to the outside.

The outer core portion 32 is installed to be rotatable and inputs or outputs rotation through the outer shaft 41 to which it is coupled, and various configurations are possible.

For example, in the outer core part 32, a plurality of second permanent magnets 31 are coupled to an inner circumferential surface corresponding to the pole piece unit 20, and an outer shaft 41 is formed on at least one side of both sides in the longitudinal direction. ) are combined.

More specifically, the outer core part 32 has a plurality of second permanent magnets 31 installed on the inner circumferential surface, and a pole piece unit 20 and an inner magnetic flux part 10 concentrically formed on the inside thereof are installed. It is preferable to have a cylindrical shape so that

Meanwhile, the outer core portion 32 may be made of a material such as metal or CFRP.

The plurality of second permanent magnets 31 are coupled to the inner circumferential surface of the outer core part 32, and induce magnetic flux change according to relative rotation through the plurality of first permanent magnets 11 and the pole piece unit 20. As a configuration, various configurations are possible.

For example, in the plurality of second permanent magnets 31, a plurality of N poles and S poles may be alternately arranged on the inner circumferential surface of the outer core part 32 in order, and the outer magnetic flux part 30 and the inner Considering the rotation ratio of the magnetic flux unit 10, it may be arranged with a preset number and circumferential length.

In addition, the plurality of second permanent magnets 31 may be arranged at regular intervals along the circumferential direction, and more preferably may be arranged and coupled to have a certain area along the inner circumferential surface of the outer core portion 32. have.

The outer shaft 41 is coupled to at least one side of both sides of the outer core part 32 in the longitudinal direction, and transmits rotational force to the outside according to the mutual magnetic flux change between the inner magnetic flux part 10 and the outer rotor part 20. Various configurations are possible as a configuration for outputting or inputting rotational force to the inner magnetic flux unit 10 .

Meanwhile, the magnetic gear according to the present invention may include a housing 43 to stably install the inner magnetic flux part 10, the pole piece unit 20, and the outer magnetic flux part 30.

The housing 43 has an inner magnetic flux part 10, a pole piece unit 20, and an outer magnetic flux part 30 installed therein, and various configurations are possible.

For example, the housing 43 may have a cylindrical shape with one end open and include a cover member 44 covering the open part at the open part.

The cover member 44 is a member that covers the open portion of the housing 43 and may be coupled to the housing 43 by bolts or the like.

On the other hand, the cover member 44 has a first through hole formed in the center so that the inner shaft 42 is exposed to the outside, and the housing 43 has an outer shaft 41 on the opposite side of the part to which the cover member is coupled to the outside. A second through hole may be formed in the center to be exposed.

In addition, in the housing 43 and the cover member 44, a plurality of bearings 81, 82, 83, and 84 are installed at appropriate positions for smooth rotation of the inner magnetic flux part 10 and the outer magnetic flux part 30. can

Meanwhile, in the housing 43, a pole piece unit 20 to be described later may be fixedly or rotatably installed.

Hereinafter, the pole piece unit 20 according to the present invention will be described.

The pole piece unit 20 according to the present invention is positioned between the outer circumferential surface of the inner magnetic flux portion 10 and the inner circumferential surface of the outer magnetic flux portion 30 to adjust magnetic flux, and various configurations are possible.

Specifically, as shown in FIGS. 3 to 7B , the pole piece unit 20 includes a plurality of pole piece members 120 made of magnetic material spaced apart at regular intervals along the circumferential direction, and a plurality of poles. It may include a base material 910 in which a plurality of pole piece insertion portions 912 into which each of the piece members 120 are inserted are formed.

The plurality of pole piece members 120 are magnetic materials spaced apart from each other at regular intervals along the circumferential direction on the outer circumferential surface of the inner skin 110, and various configurations are possible.

For example, the plurality of pole piece members 120 may be spaced apart from each other at regular intervals along the circumferential direction on the outer circumferential surface of the inner skin 110, and the outer permanent magnet 31 and the pole piece unit 20 may be installed. According to the number, a preset number of pole piece members 120 may be installed.

On the other hand, the pole piece member 120 has a length corresponding to the longitudinal direction of the inner skin 110 in order to induce a smooth mutual magnetic flux change between the pole piece unit 20 and the outer permanent magnet 31, and the inner skin ( 110) may have a structure in which a plurality of electrical steel sheets are laminated in the longitudinal direction.

The base material 910 is formed of a plurality of pole piece insertion parts 912 into which each of the plurality of pole piece members 120 is inserted through at least one process of injection and processing, and is formed of a non-magnetic material. And, as a configuration that maintains the position and shape of the pole piece members 120, various configurations are possible.

In particular, the base material 910 may preferably have a material such as epoxy or engineering plastic such as PEEK.

In particular, the base material 910 may have sufficient rigidity to maintain the position and shape of the pole piece members 120 by having a super engineering plastic material such as PEEK.

Meanwhile, at least one end of both ends of the pole piece unit 20 may be coupled with an end ring 430 made of a non-magnetic material for fixing the plurality of pole piece members 120 and the base material 910 .

The end ring 430 is configured to be coupled to at least one of both ends of the pole piece unit 20 to fix the plurality of pole piece members 120 and the base material 910, and the plurality of pole piece members 120 ) and the base material 910 is formed in a circular ring shape extending in a cylindrical shape.

And, the end ring 430 may have various materials such as engineering plastic, SUS, and CFRP, and preferably has an engineering plastic material such as PEEK.

On the other hand, at least one of the plurality of pole piece members 120 and the base material 910, preferably the base material 910, has a coupling hole 131 formed at an end for screwing with the end ring 430. can

Specifically, since the pole piece members 120 have a structure in which electrical steel sheets are laminated and it is difficult to form a hole, a coupling hole 131 is formed at the end of the base material 910 for screw coupling with the end ring 430. desirable.

Meanwhile, the pole piece unit 20 having the above structure may be rotatably installed or fixed in a rotation/fixed combination with the inner magnetic flux part 10 and the outer magnetic flux part 20.

For example, when the pole piece unit 20 is fixed as shown in FIG. 3, an end ring 410 is coupled to one end and a cover to the other end so that it can be directly or indirectly fixedly coupled to the housing 43. The base member 810 coupled to the member 44 may be coupled.

At this time, at least one of the plurality of pole piece members 120 and the non-magnetic member 130, preferably the base material 910, is screwed to the end by the base member 810 and the coupling screw 812 A coupling hole 131 may be formed.

The base member 810 is preferably made of a non-magnetic metal material having high structural rigidity in consideration of coupling with the housing 43 such as aluminum or aluminum alloy.

On the other hand, the pole piece unit 20 having the above configuration needs to maintain robustness and improve productivity when used after manufacturing.

Therefore, it is a very important factor in the productivity of the manufacturing method of the pole piece unit 20 having the above structure.

Accordingly, the present invention, as a method of manufacturing the pole piece unit 20 having the above configuration, forms a base material 910 having the above structure by processing a member having a non-magnetic material, or using a non-magnetic material Through this, it is possible to form the base material 910 having the above structure.

As a first embodiment, the manufacturing method of the pole piece unit according to the present invention is a method by processing, and as shown in FIG. 6, a cylindrical non-magnetic material corresponding to the shape of the pole piece unit 20 set in advance. With respect to the base material 910 having a material and having a hollow 911 having a gap with respect to the outer circumferential surface of the inner magnetic flux part 10, a plurality of pole piece members 120 made of a magnetic material are spaced apart at regular intervals along the circumferential direction an insertion part forming step of forming a pole piece insertion part 912 to be installed; a pole piece member insertion step of inserting the pole piece member 120 into each of the pole piece insertion units 912; A pole piece member fixing step of fixing the pole piece members 120 to the base material 910 by combining the base material 910 and the end ring 430 at the end of the base material 910 into which the pole piece member 120 is inserted. can do.

As shown in FIGS. 6(b) and 6(c), in the insertion part forming step, the inner magnetic flux part 10 has a cylindrical non-magnetic material corresponding to the shape of the pole piece unit 20 set in advance. With respect to the base material 910 in which the hollow 911 having a gap is formed with respect to the outer circumferential surface of the pole piece insertion part 912 so that the plurality of pole piece members 120 made of magnetic material are spaced apart at regular intervals along the circumferential direction. ) As a step of forming, it can be performed by various methods.

Specifically, as shown in FIGS. 6(b) and 6(c), in the step of forming the insertion part, a plurality of pole piece members made of a magnetic material are formed in a base material 910 in which a hollow 911 is formed by precision machining. The pole piece insertion part 912 is formed so that the 120 are spaced apart at regular intervals along the circumferential direction.

Here, the pole piece insertion portion 912 is a space into which each pole piece member 120 is inserted, and may be formed by penetrating along the longitudinal direction of the base material 910 or formed as a concave groove with one end blocked.

That is, in the step of forming the insertion part, the pole piece insertion part 912 is formed as a through hole along the longitudinal direction of the pole piece insertion part 912 in the base material 910, or the pole piece insertion part 912 is formed in the base material 910. ), along the longitudinal direction of the pole piece insertion portion 912, one end of the base material 910 and the other end may be formed as a groove that is not open.

On the other hand, the pole piece insertion portion 912 is preferably formed so that both ends of the cross section shape perpendicular to the longitudinal direction have a curved or wedge shape due to limitations in machining.

At this time, the shape of the pole piece member 120 inserted into the pole piece insertion portion 912 has a shape corresponding to that of the pole piece insertion portion 912 .

On the other hand, the base material 910 formed with the hollow 911, which is the object to be processed in the insertion part forming step, is formed into a hollow cylinder shape by injection, or as shown in FIG. 6 (a), a preset pole piece unit ( 20) may be manufactured by forming a hollow 911 through machining or the like in a cylindrical member having a non-magnetic material corresponding to the shape.

That is, a hollow forming step of forming a hollow 911 in the base material 910 may be performed before the insert forming step.

As shown in FIGS. 6(c) and 6(d), the pole piece member insertion step is a step of inserting the pole piece member 120 into each pole piece insertion part 912, and is performed by various methods. It can be.

As shown in FIG. 6(e), the pole piece member fixing step is performed by combining the base material 910 and the end ring 430 at the end of the base material 910 into which the pole piece member 120 is inserted. As a step of fixing the pole piece members 120 to 910, it can be performed by various methods.

Here, when the pole piece insertion part 912 formed in the base material 910 has a closed shape, the end ring 430 may be coupled only to the side where the pole piece insertion part 912 is formed.

In this case, the end ring 430 may be replaced with a base member 810 for coupling with an external structure such as the housing 43 as described above.

Meanwhile, when the pole piece insertion part 912 formed in the base material 910 is formed as a through hole, as shown in FIG. 3, one end is coupled with the end ring 430 made of engineering plastic and the other end is coupled with the housing 43. The base member 810 for coupling can be coupled.

To this end, after the pole piece fixing step, the base member 810 for coupling with the structure may be coupled to the other end of the base material 910 opposite to the one end to which the end ring 430 is coupled.

Meanwhile, of course, both ends of the base material 910 may be coupled with end rings 430 made of engineering plastics.

In addition, the end ring 430 may be integrally formed with the base member 810 for coupling with a structure or may be combined with the base member 810 for coupling with a structure.

In the pole piece fixing step, a coupling hole 914 for coupling with the end ring 430 is formed in the base material 910, and the end ring 430 is coupled to the base material 910 by a screw 913. The end ring 430 may be coupled to the base material 910 by various methods such as the like.

As a second embodiment, the manufacturing method of the pole piece unit according to the present invention is a method by injection, and as shown in FIGS. 7A and 7B, a plurality of pole piece members 120 made of magnetic material are circumferentially Therefore, an injection molding step of injection molding the base material 910 having the plurality of pole piece insertion parts 912 to be spaced apart from each other and installed at regular intervals may be included.

The injection molding step is a step of injection molding a base material 910 having a plurality of pole piece inserts 912 so that a plurality of pole piece members 120 made of magnetic material are spaced apart at regular intervals along the circumferential direction. As, after the formation of the base material 910 on which the pole piece insertion part 912 is formed, the pole piece member 120 is coupled or injected in a state where the pole piece member 120 is installed in the pole piece insertion part 912 during injection. etc. can be performed by various methods.

As a first example of injection molding, in the injection molding step, the pole piece insertion part 912 is formed so that at least one end thereof is open based on the base material 910, and after the injection molding step, each of the pole piece insertion parts 912 A pole piece member inserting step of inserting the pole piece member 120 may be performed.

After the pole piece member insertion step, the pole piece member 120 is inserted into the base material 910 by combining the base material 910 and the end ring 430 at the end of the base material 910 where the pole piece member 120 is inserted. A pole piece member fixing step of fixing may be performed.

Here, since the end ring 430 is similar to that described in the processing method, a detailed description thereof will be omitted.

As a second example of injection molding, in the injection molding step, as shown in FIGS. 7A and 7B , the base material 910 may be injection molded in a state in which the pole piece member 120 is inserted, a so-called insert injection method. .

That is, in the injection molding step, the base material 910 may be injection molded together with the pole piece member 120 by various methods.

For example, in the pole piece member 120, as shown in FIGS. 7A and 7B, during injection molding of the base material 910, a plurality of pole piece members 120 made of a magnetic material are spaced at regular intervals along the circumferential direction. It may be fixed by at least one of the base member 810 and the end ring 430 to maintain the installed state spaced apart from each other.

Specifically, before injection molding, a plurality of pole piece members 120 made of a magnetic material are fixed to at least one of the base member 810 and the end ring 430 at regular intervals along the circumferential direction and then injected using a mold. can be molded.

As another example, in the injection molding step, a plurality of pole piece members 120 made of magnetic material are fixed to the base member 810 at regular intervals along the circumferential direction, and the upper ends of the plurality of pole piece members 120 are fixed. After fixing to the end ring 430 , the base member 910 may be injection molded from the base member 810 and the end ring 430 .

Here, the base member 810 and the end ring 430 may be combined with the pole piece members 120 by various methods such as bonding by adhesive or bonding by welding.

In addition, the base member 810 and the end ring 430 may have grooves 811 and 431 or steps partially inserted into the ends of the pole piece members 120 to stably fix the pole piece members 120. can

As another example, the pole piece unit 20 may be formed by bonding and fixing the pole piece member 120 to the inside of the base member 810 by injection molding.

In this case, an undercut 915 may be formed in the base material 910 after injection molding.

On the other hand, as shown in FIGS. 6 to 7B, when the pole piece unit 20 is manufactured by the processing method or the injection method of the base material 910, the thickness of the inner and outer circumferences around the pole piece member 120 Accordingly, structural reinforcement is required.

Accordingly, at least one of the inner and outer circumferential surfaces of the base material 910 may be provided with a reinforcing member 110 for structural reinforcement.

The reinforcing member 110 is provided on at least one of the inner circumferential surface and the outer circumferential surface of the base material 910 to structurally reinforce the pole piece unit 20, and various configurations are possible.

In particular, the reinforcing member 110 may be composed of a cylindrical inner skin in close contact with the inner circumferential surface of the base material 910 or a cylindrical outer skin in close contact with the outer circumferential surface of the base material 910 .

The reinforcing member 110 has a hollow cylinder structure so that the inner magnetic flux portion 10 can be inserted and installed with a preset gap when made of an inner skin, and when made of an outer skin, the outer magnetic flux portion 30 is formed in advance. It has a hollow cylinder structure so that it can be installed with a set gap.

The reinforcing member 110 is preferably made of a non-magnetic material, and may be made of engineering plastics such as SUS and PEEK, CFRP, and the like.

In particular, the reinforcing member 110 is preferably made of CFRP material to minimize eddy current loss and to be light and have high strength.

At this time, the reinforcing member 110 may be formed by winding a carbon sheet around the cylinder jig 900 and impregnating it with a resin.

Specifically, as shown in FIG. 8 , the reinforcing member 110 may be formed by winding a carbon sheet around a cylinder jig 900 having a preset outer diameter.

Here, the cylinder jig 900 may be made of a hollow cylindrical structure or a cylindrical cylinder in consideration of the fact that the reinforcing member 110 is made of an inner skin or an outer skin.

At this time, the reinforcing member 110 may be formed by winding a carbon sheet after being installed on the outer circumferential surface of the cylinder jig 900 and impregnating it with a resin.

In addition, after forming the reinforcing member 110, the inner skin 110 may be more firmly formed through heating.

On the other hand, the reinforcing member 110 formed by the above method may be formed by being injected together as an inner skin or an outer skin during injection molding of the base material 910 in which the hollow 911 is formed, as shown in FIG. 6 (b). have.

On the other hand, the reinforcing member 110 formed by the above method may be formed by being injected together as an inner skin or an outer skin during injection molding of the base material 910, as shown in FIG. 7B.

Since the above has only been described with respect to some of the preferred embodiments that can be implemented by the present invention, as noted, the scope of the present invention should not be construed as being limited to the above embodiments, and the scope of the present invention described above It will be said that the technical idea and the technical idea accompanying the root are all included in the scope of the present invention.

100: pole piece unit 110: inner skin
120: pole piece member 10: inner rotor part
20: outer rotor part

Claims (16)

An inner magnetic flux part (10) to which a plurality of first permanent magnets (11) are coupled to an outer circumferential surface, and an outer magnetic flux part (30) to which a plurality of permanent magnets (31) are coupled to an inner circumferential surface coaxially with the inner magnetic flux part (10). ) And a pole piece unit 20 positioned between the outer circumferential surface of the inner magnetic flux portion 10 and the inner circumferential surface of the outer magnetic flux portion 30 to adjust the magnetic flux As a method of manufacturing a pole piece unit of a magnetic gear,
With respect to the base material 910 having a cylindrical non-magnetic material corresponding to the shape of the predetermined pole piece unit 20 and having a hollow 911 having a gap with respect to the outer circumferential surface of the inner magnetic flux portion 10, the magnetic material an insertion part forming step of forming a pole piece insertion part 912 so that the plurality of pole piece members 120 are spaced apart at regular intervals along the circumferential direction;
a pole piece member insertion step of inserting the pole piece member 120 into each of the pole piece insertion portions 912;
The pole piece member fixes the pole piece members 120 to the base material 910 by combining the base material 910 and the end ring 430 at the end of the base material 910 where the pole piece member 120 is inserted. Including the fixing step,
The base material 910 has a non-magnetic material, and the pole piece unit manufacturing method, characterized in that the pole piece insertion portion 912 is formed in a hole structure so as to form the entire inner and outer circumferential surface. The method of claim 1,
The step of forming the insertion part is
The pole piece insertion part 912 is formed as a through hole in the base material 910 along the longitudinal direction of the pole piece insertion part 912, or the pole piece insertion part 912 is formed in the base material 910 as a through hole. A method of manufacturing a pole piece unit, characterized in that one end of the base material 910 and the other end are formed as an unopened groove along the longitudinal direction of the piece insertion portion 912. The method of claim 2,
In the step of fixing the pole piece member,
Characterized in that by forming a coupling hole 914 for coupling with the end ring 430 in the base material 910 and coupling the end ring 430 to the base material 910 by a screw 913 Pole piece unit manufacturing method. The method of claim 3,
After the pole piece member fixing step, the base member 810 for coupling with the structure is coupled to the other end of the base material 910 opposite to the one end to which the end ring 430 is coupled. unit manufacturing method. The method of claim 3,
The pole piece unit manufacturing method, characterized in that the end ring 430 is integrally formed with the base member 810 for coupling with the structure or coupled to the base member 810 for coupling with the structure. The method of claim 1,
A method of manufacturing a pole piece unit, characterized in that a hollow forming step of forming the hollow 911 in the base material 910 is performed before the insert forming step. The method of claim 1,
The pole piece unit manufacturing method, characterized in that the step of forming the insertion portion is performed by injection molding. delete delete delete delete delete The method of any one of claims 1 to 7,
The base material 910 is a pole piece unit manufacturing method, characterized in that it has an engineering plastic material. A pole piece unit of a magnetic gear manufactured by the pole piece unit manufacturing method according to claim 13. an inner magnetic flux part 10 to which a plurality of first permanent magnets 11 are coupled to an outer circumferential surface;
an outer magnetic flux part 30 coaxial with the inner magnetic flux part 10 and coupled to a plurality of permanent magnets 31 on an inner circumferential surface;
It includes a pole piece unit 20 positioned between the outer circumferential surface of the inner magnetic flux portion 10 and the inner circumferential surface of the outer magnetic flux portion 30 to adjust the magnetic flux,
The pole piece unit (20) is a magnetic gear characterized in that manufactured by the pole piece unit manufacturing method according to claim 13. The method of claim 15
The base material 910 is a magnetic gear, characterized in that formed by injection or processing using an engineering plastic material.

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