KR102691812B1 - Motor assembly - Google Patents

Abstract

The present invention relates to motor assemblies. The present invention includes a stator unit that includes a motor pin and is configured to receive power, a housing provided to surround the stator unit, and a control device that is fastened to the housing and connected to the stator unit through the motor pin to control the power applied to the stator unit. A motor assembly including a substrate is provided.

Description

Motor assembly

The present invention relates to a motor assembly, and more specifically, to a motor assembly capable of winding and fixing a coil using an insulator and a motor pin provided in the stator unit without separate parts such as a cluster.

Centrifugal pumps can transport fluids by rotating the fluid with an impeller and generating pressure through centrifugal force. In the case of hybrid or turbo engines, there is a problem in that evaporative gas cannot be transported using a conventional purge valve alone when the engine is stopped, so a separate centrifugal pump is applied between the purge valve and the canister to actively transport evaporative gas collected in the canister. It was made possible.

The motor part of a centrifugal pump largely consists of a rotor assembly, a stator assembly, and a housing assembly. The rotor assembly includes an impeller, magnet, rotor shaft, etc., the stator assembly includes a stator, coil, etc., and the housing assembly includes bushes and bearings to support the rotor assembly and stator assembly. . In addition, the motor part includes electrical parts such as PCB.

Figure 1 shows an example of a conventional stator assembly (Patent Document 1 below). The stator assembly applied to the electric compressor according to the prior art has a connection pin 154 of the sealing terminal 150 and a stator ( 124) A cluster 170 is provided with a connection terminal 160 that can electrically connect the internal winding coil 129.

The sealing terminal 150 serves to electrically connect the electric motor and the inverter. The conventional stator assembly has an improved connection structure between the sealing terminal 150 and the winding coil 129 of the electric motor, and is a structure that improves assembly and reduces costs. However, in addition to the connection terminal 160, a separate cluster 170 and a sealing terminal 150 are required, which causes a problem in that the number of required parts increases excessively.

Patent Document 1: Republic of Korea Patent Publication No. 10-2022-0083007

The present invention was devised to solve the above problems, and provides a motor assembly capable of winding and fixing a coil using an insulator and a motor pin provided in the stator unit.

In addition, a motor assembly configured such that a coil wound around the auxiliary insulator is supported and fastened to the first locking portion, the second locking portion, and the third locking portion is provided.

The objects of the present invention are not limited to the objects mentioned above, and other objects of the present invention that are not mentioned can be understood by the following description and can be more clearly understood by examples of the present invention. Additionally, the objects of the present invention can be realized by means and combinations thereof as indicated in the claims.

The motor assembly for achieving the object of the present invention described above includes the following configuration.

In one embodiment of the present invention, a stator unit including a motor pin and configured to receive power; a housing provided to surround the stator unit; and a control board fastened to the housing and connected to the stator unit through the motor pin to control power applied to the stator unit. Provides a motor assembly including.

Additionally, the stator unit includes a stator installed in the housing; a main insulator fastened to the stator, spaced apart from an upper part of the control board, and fastened to the motor pin; And at least one auxiliary insulator is fastened to the inside of the main insulator and is wound with a coil that receives current. Provides a motor assembly including.

In addition, the auxiliary insulator includes a first engaging portion formed in a groove shape at an end of the auxiliary insulator and supporting the coil while the coil is wound around the auxiliary insulator; Provides a motor assembly including.

In addition, the main insulator is located adjacent to the first locking part, protrudes from the outer surface of the main insulator and is bent in the axial direction, and has a second locking part for continuously locking and supporting the coil caught in the first locking part. wealth; Provides a motor assembly including.

In addition, the motor pin is located adjacent to the second locking portion and protrudes from an outer end of the motor pin and is bent in the circumferential direction of the main insulator, and the end of the coil hooked to the second locking portion is fastened. third locking portion; Provides a motor assembly including.

In addition, the coil provides a motor assembly configured to be positioned on the same line in the circumferential direction of the stator portion while being supported by the first engaging portion, the second engaging portion, and the third engaging portion.

In addition, the motor pin includes a motor pin fastening portion formed at an end, elastically compressed when fastened to the control board, restored after being assembled on the control board, and having an elastic restoring force to support the control board. Provides a motor assembly including.

In addition, the main insulator and the auxiliary insulator provide a motor assembly in which the main insulator and the auxiliary insulator are integrally injection molded.

Additionally, a ground pin formed adjacent to the motor pin at the bottom of the main insulator and fastened to the control board to shield electromagnetic waves; It provides a motor assembly further comprising:

In addition, the ground pin includes a ground pin fastening portion formed at an end, elastically compressed when fastened to the control board, restored after being assembled to the control board, and having an elastic restoring force to support the control board. Provides a motor assembly including.

The present invention can achieve the following effects by combining the above-mentioned embodiment with the configuration, combination, and use relationship described below.

The present invention can perform winding and fixing of the coil using the insulator and motor pin, which are parts provided in the stator part, and has the effect of simplifying the assembly process and reducing costs by assembling it without separate parts such as a cluster. have

In addition, the coil wound on the auxiliary insulator is configured to be supported by the first locking portion and the second locking portion and fastened to the third locking portion, which has the effect of preventing separation or movement of the coil strand.

1 is an exploded perspective view of a stator assembly according to the prior art.
Figure 2 shows a cross-sectional view of a centrifugal pump to which a motor assembly according to an embodiment of the present invention is applied.
Figure 3 shows a configuration diagram of a motor assembly as an embodiment of the present invention.
Figure 4 is an embodiment of the present invention, showing a perspective view of a motor assembly in a fully assembled state with a control board fastened to a housing.
Figure 5 is another embodiment of the present invention, showing a bottom view of the stator portion in a state in which the coil is supported by the first locking portion and the second locking portion and fastened to the third locking portion.
Figure 6 is another embodiment of the present invention, showing a side view of the stator portion in a state in which the coil is supported by the first engaging portion and the second engaging portion and fastened to the third engaging portion.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the attached drawings. Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the following embodiments. This example is provided to more completely explain the present invention to those skilled in the art.

Additionally, terms such as "...unit" and "...assembly" used in the specification refer to a unit that processes at least one function or operation, and may be implemented by hardware or a combination of hardware.

Additionally, in this specification, when a part is said to be “on” or “on” another part, this includes not only the case where it is “right on” the other part, but also the case where there is another part in between. In addition, when a part is said to be “under” or “under” another part, this includes not only cases where it is “immediately below” another part, but also cases where there is another part in between.

In addition, in this specification, the names of the components are divided into first, second, etc. to distinguish them because the names of the components are the same, and the order is not necessarily limited in the following description.

Additionally, in this specification, “axial direction” and “circumferential direction” are based on the main insulator 230.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings.

Figure 2 shows a cross-sectional view of a centrifugal pump to which a motor assembly according to an embodiment of the present invention is applied, Figure 3 shows a configuration diagram of a motor assembly as an embodiment of the present invention, and Figure 4 shows a configuration of a motor assembly according to an embodiment of the present invention. As an example of an embodiment, it shows a perspective view of a motor assembly in a fully assembled state with a control board fastened to a housing, and Figure 5 is another embodiment of the present invention, where the coil is connected to the first and second locking parts. It shows a bottom view of the stator part in a state where it is supported and fastened to the third locking part, and Figure 6 shows another embodiment of the present invention, in which the coil is supported by the first locking part and the second locking part and is connected to the third locking part. A side view of the stator part in a state fastened to the part is shown.

Referring to Figures 2 to 6, the motor assembly according to an embodiment of the present invention includes a motor pin 210 and a stator unit 200 configured to receive power, and is provided to surround the stator unit 200. It includes a housing 300 and a control board 400 that is fastened to the housing 300 and connected to the stator unit 200 through the motor pin 210 to control the power applied to the stator unit 200.

As shown in Figure 2, when applied to a centrifugal pump, the motor assembly is fastened to the lower end of the centrifugal pump. A centrifugal pump to which a motor assembly according to an embodiment of the present invention is applied may include a centrifugal pump cover 500, an impeller 510, a middle housing 600, and a housing 300 located below the middle housing 600. there is.

The centrifugal pump cover 500 has a fluid inlet and outlet and is mounted on the upper part of the housing 300. The centrifugal pump cover 500 is fixed to the housing 300 by a plurality of screws 530 arranged along the circumference. The centrifugal pump cover 500 forms a pump flow rate.

The middle housing 600 is fastened to the centrifugal pump cover 500. More specifically, the middle housing 600 is installed between the centrifugal pump cover 500 and the housing 300. The space above the middle housing 600 becomes a fluid compression space where fluid is compressed by the impeller 510, and the space below the middle housing 600 becomes an installation space for electrical components. That is, a fluid compression space is formed by the centrifugal pump cover 500 and the middle housing 600, and a space for installing electrical components is formed by the middle housing 600 and the housing 300. The middle housing 600 forms a pump flow rate together with the centrifugal pump cover 500.

The housing 300 is fastened to the middle housing 600. More specifically, the housing 300 is coupled to the lower side of the centrifugal pump cover 500 with a screw 530, and the middle housing 600 is sandwiched between the lower surface of the centrifugal pump cover 500 and the housing 300. The middle housing 600 is coupled between the centrifugal pump cover 500 and the housing 300.

The sealing member 520 is located on the bottom surface of the cylindrical body of the centrifugal pump cover 500. More specifically, the sealing member 520 is installed where the centrifugal pump cover 500, middle housing 600, and housing 300 meet each other. The place where the three parts of the centrifugal pump cover 500, middle housing 600, and housing 300 meet each other is located in the upper peripheral part of the centrifugal pump.

As an example, the sealing member 520 may be an O-ring that is generally ring-shaped and has a circular cross-section. When the sealing member 520 is installed in the sealing member installation space, its upper, lower, left, and right ends are in close contact with surrounding components forming the sealing member installation space. The upper end of the sealing member 520 is in close contact with the lower surface of the centrifugal pump cover 500, the lower end is in close contact with the upper surface of the housing 300, the left end is in close contact with the outer surface of the middle housing 600, and the right end is in close contact with the outer surface of the middle housing 600. The end is in close contact with the inner surface of the centrifugal pump cover 500.

The stator unit 200 is located inside the housing 300 and is configured to receive power. The stator unit 200 includes a motor pin 210, and the housing 300 is configured to surround the stator unit 200.

More specifically, the centrifugal pump to which the motor assembly according to an embodiment of the present invention is applied is composed of a stator unit 200 including a bearing 270, a rotor shaft 280, a magnet 290, and a coil 250. . The stator unit 200 is formed in an annular shape with a hollow center so that the rotor shaft 280 can rotate through the stator unit 200 and the middle housing 600. The magnet 290 is located in the hollow of the stator unit 200, and the rotor shaft 280 is coupled to the magnet 290 and rotates.

The rotor shaft 280 is installed axially in the inner center of the centrifugal pump. The rotor shaft 280 has a tubular shape with a hollow formed in its longitudinal direction. The impeller 510 may structurally be composed of an upper impeller 510a and a lower impeller 510b. A space with a partition is formed between the upper impeller 510a and the lower impeller 510b to propel the fluid in one direction. The upper end of the rotor shaft 280 protrudes into the fluid compression space through the middle housing 600, and an impeller 510 is installed at the end. The impeller 510 rotates together with the rotation of the rotor shaft 280 and forms a pressure difference according to the rotation. The rotor shaft 280 is supported by the middle housing 600 via a pair of upper and lower bearings 270 and can rotate at high speed. A pair of bearings 270 are inserted and installed on the inner peripheral surface of a cylinder formed in the center of the middle housing 600.

The control board 400 is located below the stator unit 200. The control board 400 is fastened to the housing 300 and connected to the stator unit 200 through the motor pin 210 to control the power applied to the stator unit 200. The control board 400 is provided with a control unit (not shown) that controls the stator unit 200. More specifically, the control unit controls the electromagnetic force of the stator unit 200. The control unit is provided in the form of a chip on the control board 400.

The stator unit 200 includes a motor pin 210, a stator 220, a main insulator 230, an auxiliary insulator 240, and a coil 250. A magnet 290 is installed on the outer peripheral surface of the rotor shaft 280, and a stator unit 200 is installed on the inner peripheral surface of the housing 300 corresponding to the magnet 290. The coil 250 is electrically connected to a terminal 700 that transmits electrical signals and a control board 400. An impeller 510, a bearing 270, and a magnet 290 are fixed to the rotor shaft 280. The coil 250 transmits current, and the stator 220 forms a magnetic circuit.

Therefore, when current is supplied to the coil 250 through the terminal 700 and the control board 400, a magnetic field is formed in the stator 220, and a rotational force is generated in the magnet 290 in response to the magnetic field, thereby causing the rotor shaft 280 ) rotates, and the impeller 510 rotates to suck fluid into the centrifugal pump cover 500, and the sucked fluid is compressed and discharged.

The stator unit 200 includes a stator 220 installed in the housing 300, a main insulator 230 fastened to the stator 220 and to which the motor pin 210 is fastened, and a coil 250 receiving current is wound. Includes an auxiliary insulator (240). In one embodiment, the stator unit 200 may be formed into one body with the housing 300 by insert injection molding into the housing 300 to reduce costs and protect internal components.

The main insulator 230 is fastened to the stator 220. More preferably, the main insulator 230 may be respectively fastened to the upper and lower parts of the stator 220. The main insulator 230 is located spaced apart from the upper part of the control board 400 and the motor pin 210 is fastened thereto. More preferably, the motor pin 210 is configured such that one end is fastened to the main insulator 230 fastened to the lower part of the stator 220 and the other end is fastened to the control board 400.

At least one auxiliary insulator 240 is fastened to the inside of the main insulator 230, and a coil 250 that receives current is wound thereon. The auxiliary insulator 240 is configured to support the coil 250 and disconnect between the coil 250 and the stator 220. In one embodiment, as shown in FIG. 3, three auxiliary insulators 240 may be fastened to the inside of the main insulator 230, spaced apart from each other.

The auxiliary insulator 240 includes a first engaging portion 241 formed in a groove shape at an end of the auxiliary insulator 240. The first locking portion 241 is formed to lock and support the coil 250 while it is wound around the auxiliary insulator 240. In one embodiment, two first locking portions 241 may be formed to be spaced apart in the width direction of the auxiliary insulator 240. The coil 250 may be supported by being wound around the auxiliary insulator 240 and then caught at both ends by the first engaging portion 241 . The first locking portion 241 is configured to catch the coil 250 and can support it so that it does not deviate or move upward.

The main insulator 230 is located adjacent to the first locking portion 241 and includes a second locking portion 231 that protrudes from the outer surface of the main insulator 230 and is bent in the axial direction. The second engaging portion 231 is configured to continuously engage and support the coil 250 caught on the first engaging portion 241. In one embodiment, the second locking portion 231 may be configured to have an “L” shape in cross-section.

A plurality of second locking portions 231 are formed along the circumferential direction of the main insulator 230. In one embodiment, as shown in FIG. 3, six second locking portions 231 may be formed spaced apart in the circumferential direction of the main insulator 230. The second engaging portion 231 is adjacent to both sides of the first engaging portion 241 and is configured to continuously engage the coil 250 caught on the first engaging portion 241. The second locking portion 231 is configured to catch the coil 250 and can support it so that it does not deviate or move downward.

The motor pin 210 is located adjacent to the second locking portion 231 and includes a third locking portion 211 that protrudes from the outer end of the motor pin 210 and is bent in the circumferential direction of the main insulator 230. . The third locking portion 211 is configured to fasten the end of the coil 250 caught on the second locking portion 231. In one embodiment, the third engaging portion 211 may be configured to have a “ㄷ” shape in cross-section.

At least one third engaging portion 211 is formed on one side of the motor pin 210. In one embodiment, as shown in FIG. 3, two third locking portions 211 may be formed on both sides of the motor pin 210. The third engaging portion 211 is adjacent to both sides of the second engaging portion 231 and is configured to engage and fasten the end of the coil 250 caught by the second engaging portion 231. The third locking portion 211 is configured to fasten the end of the coil 250 to support and fix the coil 250 so that it does not deviate or move in the left or right direction. In one embodiment, the end of the coil 250 may be fastened to the third engaging portion 211 by welding.

The main insulator 230, the auxiliary insulator 240, and the motor pin 210 are assembled so that the first engaging portion 241, the second engaging portion 231, and the third engaging portion 211 are sequentially arranged. Accordingly, the first engaging portion 241, the second engaging portion 231, and the third engaging portion 211 are continuously positioned along the circumferential direction of the main insulator 230 to support and secure the coil 250. .

The first engaging portion 241, the second engaging portion 231, and the third engaging portion 211 may sequentially support the coil 250 so that it does not deviate or move in the upward, downward, and left/right directions. More preferably, the coil 250 is supported on the first engaging portion 241, the second engaging portion 231, and the third engaging portion 211 and is positioned on the same line in the circumferential direction of the stator portion 200. It can be configured to do so.

The motor assembly according to an embodiment of the present invention further includes a ground pin 260 formed adjacent to the motor pin 210 at the bottom of the main insulator 230. More preferably, the ground pin 260 is configured such that one end is fastened to the main insulator 230 fastened to the lower part of the stator 220 and the other end is fastened to the control board 400. The ground pin 260 is fastened to the control board 400 and is configured to shield electromagnetic waves.

The motor pin 210 is formed at the end and is elastically compressed when fastened to the control board 400, and is restored after being assembled on the control board 400, and has an elastic restoring force to support the control board 400. 212). In one embodiment, as shown in FIG. 6, the motor pin fastening portion 212 may be formed in the shape of a needle's eye. Likewise, the ground pin 260 is formed at the end, is elastically compressed when fastened to the control board 400, and is restored after being assembled on the control board 400, so that it has an elastic restoring force to support the control board 400. Includes a fastening portion 261. In one embodiment, as shown in FIG. 6, the ground pin fastening portion 261 may be formed in the shape of the eye of a needle.

A hole through which the motor pin 210 and the ground pin 260 can be fastened is formed in the control board 400. Additionally, a hole into which the terminal 700 is fastened may be formed in the control board 400. The motor pin 210 is connected to the control board 400 to transmit current, and the ground pin 260 is configured to absorb electromagnetic waves. The terminal 700 is formed on one side of the outer circumference of the housing 300 and transmits electrical signals. One end of the terminal 700 is fastened to the control board 400. As an example, three terminals 700 may be formed in a downward “ㄷ” shape corresponding to the shape of one side of the outer circumference of the housing 300.

The motor assembly according to an embodiment of the present invention is assembled by winding the coil 250 around the auxiliary insulator 240 while the auxiliary insulator 240 is fastened to the main insulator 230, and press-fitting it into the stator 220. It can be.

In a motor assembly according to another embodiment of the present invention, the main insulator 230 and the auxiliary insulator 240 may be injection molded as one body. After the main insulator 230 and the auxiliary insulator 240, which are formed as one body, are press-fitted into the stator 220 and assembled, the coil 250 can be wound on the auxiliary insulator 240.

After being wound around the auxiliary insulator 240, the coil 250 is inserted into the first engaging portion 241 and is continuously tightly seated on the second engaging portion 231 and the third engaging portion 211. The end of the coil 250 caught on the third locking portion 211 is fixed to one end of the third locking portion 211 by welding. The stator part 200 completed in this way is insert-injected into the housing 300 together with the terminal 700. On one side of the housing 300 where the insert injection has been completed, the motor pin fastening part 212 and the ground pin fastening part 261 protrude to the outside, and the control board 400 is connected to the motor pin 210 and the ground pin ( 260) and fix it.

In summary, the present invention enables winding and fixing of the coil 250 using the insulator and motor pin 210, which are components provided in the stator unit 200, thereby simplifying the assembly process and reducing costs. The coil 250 is configured to be supported by the first engaging portion 241 and the second engaging portion 231 and fastened to the third engaging portion 211, thereby preventing the strands of the coil 250 from being separated or moving. Provides motor assembly.

The above detailed description is illustrative of the present invention. Additionally, the foregoing is intended to illustrate preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, changes or modifications can be made within the scope of the inventive concept disclosed in this specification, a scope equivalent to the disclosed content, and/or within the scope of technology or knowledge in the art. The described embodiments illustrate the best state for implementing the technical idea of the present invention, and various changes required for specific application fields and uses of the present invention are also possible. Accordingly, the detailed description of the invention above is not intended to limit the invention to the disclosed embodiments. Additionally, the appended claims should be construed to include other embodiments as well.

200: stator part 210: motor pin
211: third engaging portion 212: motor pin fastening portion
220: stator 230: main insulator
231: second engaging portion 240: auxiliary insulator
241: first engaging portion 250: coil
260: Ground pin 261: Ground pin fastening part
270: bearing 280: rotor shaft
290: magnet 300: housing
400: Control board 500: Centrifugal pump cover 510: Impeller 510a: Upper impeller
510b: lower impeller 520: sealing member
530: screw 600: middle housing
700: terminal

Claims (10)

A stator unit including a motor pin and configured to receive power;
a housing provided to surround the stator unit; and
A control board fastened to the housing and connected to the stator unit through the motor pin to control power applied to the stator unit,
The stator part is,
A stator installed in the housing;
a main insulator fastened to the stator, spaced apart from an upper part of the control board, and fastened to the motor pin; and
At least one auxiliary insulator is fastened to the inside of the main insulator and is wound with a coil that receives current,
The auxiliary insulator includes a first engaging portion formed in a groove shape at an end and engaging and supporting the coil in a wound state,
The main insulator includes a second locking portion located adjacent to the first locking portion, protruding from the outer surface and bent in the axial direction, and continuously engaging and supporting the coil hooked on the first locking portion;
A motor assembly comprising:
delete delete delete According to clause 1,
The motor pin is,
a third engaging portion located adjacent to the second engaging portion, protruding from an outer end of the motor pin, bent in the circumferential direction of the main insulator, and to which an end of the coil caught by the second engaging portion is fastened;
A motor assembly comprising:
According to clause 5,
The motor assembly is configured so that the coil is positioned on the same line in the circumferential direction of the stator portion while being supported by the first engaging portion, the second engaging portion, and the third engaging portion.
According to clause 1,
The motor pin is,
a motor pin fastening portion formed at an end, elastically compressed when fastened to the control board, restored after being assembled on the control board, and having an elastic restoring force to support the control board;
A motor assembly comprising:
According to clause 1,
A motor assembly in which the main insulator and the auxiliary insulator are injection molded as one body.
According to clause 1,
a ground pin formed adjacent to the motor pin at the bottom of the main insulator and fastened to the control board to shield electromagnetic waves;
A motor assembly further comprising:
According to clause 9,
The ground pin is,
a ground pin fastening portion formed at an end, elastically compressed when fastened to the control board, restored after being assembled on the control board, and having an elastic restoring force to support the control board;
A motor assembly comprising: