KR100883595B1 - motor - Google Patents

Abstract

The present invention relates to a motor, and more particularly, to a motor that is easy to manufacture and promotes efficiency and durability. In addition, the present invention relates to a motor having a compact configuration, easy to handle and use, and improved noise and vibration characteristics.

According to the present invention, a stator assembly including a stator and a mold part is integrally formed, and an open part is formed on an upper side thereof; A current carrying portion mounted on an upper surface of the PCB and seated on an upper portion of the stator assembly; And an upper bracket coupled to the stator assembly to seal the upper opening of the stator assembly, and a portion of an upper surface of the upper bracket may include a strength reinforcing rib.

Motor, Stator Assembly, Mold, Bracket, PC, Assembly, Rib

Description

Motor

1 is an exploded perspective view of a motor according to the present invention;

FIG. 2 is a perspective view of the stator shown in FIG. 1; FIG.

3 is a perspective view of the stator assembly and the PC shown in FIG.

4 is a cross-sectional view taken along line II of FIG. 2;

5 is a plan view of FIG. 3;

FIG. 6 is a partially enlarged view of the stator shown in FIG. 3; FIG.

7 is an enlarged view of a perspective view and a connector portion of a motor according to the present invention;

8 is a plan view of a motor according to the present invention;

9 is an enlarged view of a perspective view of the motor and the upper bracket and the mold portion engaging portion according to the present invention;

10 is a cross-sectional view of a perspective view of the motor and the coupling portion of the upper bracket and the mold according to the present invention.

** Description of the main parts of the drawing **

100: stator assembly 110: stator

113, 114, 115, 116: Power pin 117: Dummy pin

118: positioning projection 119: coil

130: mold part 131, 132: mold part opening part

200: PC 210: power supply unit

230: connector 300: rotor assembly

310: rotor 313: rotation axis

410, 420: bracket 600: torsion spring

The present invention relates to a motor, and more particularly, to a motor that is easy to manufacture and promotes efficiency and durability. In addition, the present invention relates to a motor that is compact in construction and easy to handle and use.

In general, a motor refers to an apparatus for transmitting a rotational force to the outside by rotating the rotor by electromagnetic interaction between the stator and the rotor. Here, the rotational force of the rotor drives the load through the rotating shaft.

On the other hand, the stator generally includes a stator core and a coil wound around the stator core. Here, the stator core is electrically insulated from the coil through an insulator or bobbin.

However, at least a part of the stator and the rotor are accommodated in a bracket forming a motor appearance, and a problem may occur in which the coil is damaged by an external environment or vibration. In addition to the damage of the coil, there is a possibility that an electric leakage may be generated through which the electric current passes through the coil or the stator core.

Accordingly, in order to solve such a problem, a motor has been proposed in which a stator core, a coil, and an insulator are assembled to form a stator, and then the molded stator is formed to form one stator assembly. Such a motor will be referred to as a stator molding type motor for convenience of description.

On the other hand, in general, the motor requires a control device for controlling the driving of the motor, in which case such a control device may be included in the motor itself, it may be provided in the product itself applied motor.

Such a control device is formed on a substrate (PCB, PCB) and the like, and it is not easy to implement a stator molding type motor in the motor in which the PC is embedded. This is because an electrical connection must be made between at least the coil located inside the molding and the PC, since it is not easy to implement.

In addition, even if such a connection is made, there is a problem of reliability.

In addition, such a stator molding type motor has a problem in that the assembly process is complicated and the assembly is not easy, and there is a high possibility that a defect may occur in the assembly process.

An object of the present invention is to solve all the problems in the stator molding type motor incorporating the above-described PC.

More specifically, an object of the present invention is to provide a motor that is easy to manufacture and assemble to increase productivity.

It is also an object of the present invention to provide a motor capable of coupling the PC to the stator assembly more easily, firmly and accurately.

In addition, an object of the present invention is to provide a motor with improved noise or vibration characteristics.

In order to achieve the above object, the present invention includes a stator assembly including a stator and a mold part, the stator assembly having an open part formed at an upper part and a lower part thereof; A PCB seated on an upper portion of the stator assembly; A rotor assembly inserted into the lower opening of the stator assembly and rotatably provided in the stator assembly; And it provides a motor comprising an upper bracket and a lower bracket for sealing the upper and lower openings of the stator assembly, respectively.

Here, the rotor assembly may include a rotor positioned inside the stator assembly and a rotation shaft that is integrally rotated with the rotor. The stator may include a hollow stator core and an insulator provided in the stator core to which a coil is wound.

The mold part is formed to surround the stator core and the insulator. However, the mold portion is preferably formed so that the surface of the stator core facing the rotor is exposed. Because the exposed surface forms an air gap (void) between the stator and the rotor, it is very difficult to form the air gap to an appropriate level if the mold portion is formed in this void portion.

On the other hand, the present invention, it is preferable that the insulator is provided, including a positioning boss that is exposed to the upper portion of the mold portion to determine the position of the PCB when forming the mold portion. That is, once the stator including the insulator is wrapped in the mold part, it is difficult to determine the exact position of the PC with respect to the stator. Therefore, even if the mold part is formed through the positioning boss, it is possible to fix the PC ratio at the correct position with respect to the stator. And it will be preferable that the positioning groove corresponding to the positioning boss is formed in the PC.

Here, the positioning boss is preferably at least one. In addition, the positioning boss is preferably formed integrally with the insulator.

The mold part may be formed by BMC molding.

On the other hand, the present invention, it is preferable that the insulator, and when forming the mold portion, one end is exposed to the upper portion of the mold portion preferably comprises a pin electrically connected to the PC. And the pin is preferably formed to penetrate the insulator.

The pin is formed of a conductor and serves to electrically connect the coil wound around the stator and the PC. In addition, the pin is soldered to the PCB to serve to secure the PCB is coupled to the stator assembly.

Here, the other end of the pin is electrically connected to the coil, it is preferably located in the mold portion. That is, the other end of the pin is located inside the mold part in a state connected to the coil, and when one end of the pin is exposed to the upper part of the mold, all parts of the coil are located inside the mold part. Therefore, some of the coils do not need to be exposed outside the mold part. Therefore, there is no fear of damaging the coil when forming the mold part, and in particular, there is no fear of damaging the end of the coil, that is, the portion electrically connected to the PC.

In order to achieve the above object, the present invention also comprises a first step of forming a stator assembly formed integrally by forming a mold portion on the stator; A second step of seating a PC on an upper portion of the stator assembly; Sealing the upper opening of the stator assembly with an upper bracket; Inserting a rotor assembly into the bottom of the stator assembly; And it provides a motor manufacturing method comprising a fifth step of sealing the lower opening of the stator assembly with a lower bracket.

Here, before the fourth step may further include a step of coupling the rotation axis to the rotor to form a rotor assembly. And magnetizing the permanent magnet provided in the rotor between the third and fourth steps.

The stator assembly may be formed such that at least one of the positioning boss for determining the position of the PCB and the pin electrically connected to the PCB may be exposed to the upper portion of the mold part.

In order to achieve the above object, the present invention also comprises a stator assembly including a stator and a mold part, the stator assembly having an opening formed thereon; A current carrying portion mounted on an upper surface of the PCB and seated on an upper portion of the stator assembly; And an upper bracket coupled to the stator assembly to seal the upper opening of the stator assembly, wherein a portion of the upper surface of the upper bracket is provided with a strength reinforcing rib.

Hereinafter, a motor according to the present invention will be described in detail with reference to the accompanying drawings.

First, the configuration of a motor according to the present invention will be described in detail with reference to FIG. 1.

1 is an exploded perspective view of a motor according to the present invention.

The motor according to the present invention includes a stator assembly 100, a rotor assembly 300, and a PC 200.

That is, the rotor assembly 300 rotates with respect to the stator assembly 100. In this case, the PCB performs a control function of allowing the rotor assembly 300 to rotate.

The stator assembly 100 includes a stator 110 and a mold 130. The mold part may be formed of a resin material or the like, and preferably, may be formed of a bulk molding compound (BMC) molding.

As shown in FIG. 2, the stator 110 includes a stator core 111, an insulator 112, and a stator coil 119 (hereinafter referred to as “coil”).

The stator core 111 is generally formed by stacking an electrical steel sheet or the like. Although not shown, teeth are formed so that the coil 119 is wound around the teeth. Here, an insulator 112 is provided for insulation between the teeth and the stator core 111 and for ease of winding of the coil 119.

The insulator 112 may be formed to be inserted into the upper and lower portions of the stator core 111, respectively, and may be formed integrally with the stator core 111 by inserting and molding the stator core 111. That is, when the stator core 111 and the insulator 112 are integrally formed by such insert molding, they form a single stator assembly 110 and are very difficult to be physically separated. Therefore, there is an advantage that the handling is very easy during assembly. In addition, rather than forming the insulator 112 in a separate piece (couple) to the stator core 111, there is an advantage that it is very easy to form a mold to be described later.

2 illustrates a state in which the insulator 112 is insert molded into the stator core 111 to be integrally formed.

Meanwhile, a coil 119 is wound around the stator core 111 through the insulator 112, and a configuration for connecting the coil 119 to an external power source is required. That is, a configuration is required for the terminal 121 of the coil 119, which starts and ends the winding of the coil, to be electrically connected to an external power source.

This is irrespective of whether single-phase power or three-phase power is applied to the coil 119. However, for convenience of description, the coil is limited to a case where three-phase power is applied. That is, the form in which the coil is connected to a power source on u, v, and w will be described as an example. Since this is a general matter in the form of driving a motor through an inverter, a detailed description thereof will be omitted. 2 shows a stator 110 having a coil formed on each of u, v, and w phases.

The motor according to the present invention is particularly preferable for the motor in the form in which the stator 110 is located inside the mold 130. That is, the mold unit 130 is formed to surround the stator 110 from the outside, and the stator 110 and the mold unit 130 are integrally formed. Thus, one stator assembly 100 is formed. Although the stator 110 and the mold part 130 are shown in a separated form in FIG. 1, the stator assembly 100 is formed by forming the mold part 130 first and then forming the mold part 130. ).

The mold 130 forms a part of the outer shape of the motor. Here, since the mold part may be formed of a resin material or the like as described above, the insulation performance and water resistance are very excellent. In addition, since the coil 119 surrounds the wound stator 110 and is isolated from the outside, coil damage and a short circuit may be effectively prevented.

On the other hand, the mold 130 is surrounded by the stator 110, it is preferable that the surface 120 facing the rotor 310 of the stator core 111 is formed so as not to wrap. This is because an air gap is formed between the surface 120 and the outer circumferential surface of the rotor, because the air gap is preferably maintained at a very high level in terms of efficiency, noise, and vibration of the motor. Therefore, it is more preferable to keep the surface 120 as it is (as formed by the punching) as it is.

As described above, as a configuration for electrically connecting the coil 119 to an external power source or the like, the motor according to the present invention includes a pin. Here, the pin may be provided in various ways depending on the type of power applied to the coil 119. For example, at least three pins may be provided to control the driving of the motor by applying power on u, v, and w 3.

2, power pins 113, 114, and 115 that are electrically connected to coils on u, v, and w phases are illustrated.

In the motor according to the present invention, the stator 110 may be formed to be wrapped in the mold part 130, in which case it is very difficult to form only the end portion of the coil to be exposed out of the mold part 130. This is because, due to the weak rigidity of the coil itself, the coil end may be damaged when the mold part 130 is formed, and may be buried inside the mold part 130 at all. Therefore, the end 121 of the coil 119 is first electrically connected to the power pins 113, 114, and 115, and the power pin is preferably exposed to the outside of the mold 130.

The pins, in particular the power pins may be in the form of a rod formed of a metal material. And the power pin is preferably made integral with the insulator 112. In other words, when the insulator 112 is molded and formed, the power pins may be inserted and integrally formed with the insulator 112. This form is shown in Figure 2, in particular the power pins are preferably formed to penetrate the insulator 112.

Here, the lower end, that is, one end of the power pins 113, 114 and 115 is electrically connected to the end of the coil 119. Specifically, one end of the coil may be wound around one end of the power pin, and may be connected through soldering or the like.

On the other hand, in order to prevent the electrical connection between one end of the power pin and the coil end portion is damaged, it is preferable that all of one end of the power pin is located in the mold 130.

That is, as shown in Figure 4, one end of the power pin is electrically connected to the coil end 121, it is preferable that the mold 130 is not exposed to the outside. In addition, the upper end, that is, the other end of the power pins 113, 114, and 115 may be exposed to the outside of the mold unit 130. Here, the power pin preferably has sufficient rigidity so as not to be damaged when the mold part 130 is formed.

Therefore, the coil 119 is positioned inside the mold 130 after the terminal 121 is electrically connected to one end of the power pin and is not exposed to the outside, and the other end of the power pin is outside the mold 130. It is exposed to and is electrically connected to an external power source.

Meanwhile, the other ends of the power pins 113, 114, and 115 may be exposed to the outside of the mold unit 130, in particular, the upper portion of the mold unit 130, as shown in FIGS. 3 to 4. That is, the mold 130 has opening portions 131 and 132 formed at upper and lower portions thereof, respectively, and the stator assembly 100, in particular, the mold portion 130 and the PCB are formed through the upper opening portion 131. 200 may be combined. Of course, depending on the point of view, the upper opening may be referred to as a lower opening.

Here, the other end of the power pin exposed to the outside of the mold 130 is inserted into the hole 220 formed in the PC. Electrical patterns are formed in the PCB, and the power pin is inserted into the hole 220 to electrically connect the two. Of course, soldering may be made for a more secure connection.

The PCB 200 is coupled to the mold 130 through the combination of the power pins 113, 114, and 115 and the holes 220.

Meanwhile, in this case, the coil ends of each of the u, v, and w phases are connected to the PC 200, and the neutral point formed by the coils of the respective phases needs to be electrically connected to the PC 200. Therefore, by this need, the power pin in the motor according to the present invention may further comprise a neutral power pin (116). The neutral power pin 116 may have the same shape as the other power pins 113, 114, and 115, and electrical connections may be made in the same shape.

Here, the motor according to the present invention may further comprise a positioning boss 118. This positioning boss 118 performs a function of positioning the PC 200 in the correct position.

In the present invention, since the stator 110 may be located inside the mold unit 130, it is difficult to accurately match the position of the PC 200 with respect to the stator 110. Therefore, it is difficult to accurately match the position of the PC 200 with respect to the rotor 310 or the rotor assembly 300.

In general, control devices for driving a motor are provided in the PCB 200, and in particular, the PCB 200 may be provided with a hall sensor (not shown) that senses the position of the rotor 310. The Hall sensor senses the position of the rotor by sensing the magnetic flux that changes as the permanent magnet 311 of the rotor 310 rotates. That is, the motor drive is controlled based on the position of this rotor.

Therefore, such a Hall sensor is very important relative position to the rotor in order to sense the exact position of the rotor 310. In other words, the relative position of the PC 200 with the Hall sensor with respect to the stator 110 or the rotor 310 is very important. Therefore, it is very important that the PC 200 is coupled to the correct position of the mold 130.

Of course, the positioning of the PC 200 may be performed by the above-described power pins 113, 114, 115, and 116 and a dummy pin described later. However, in the case of forming the coil as shown in FIG. 2, the power pins 113, 114, and 115 are biased on either side, and the neutral power pin 116 may be formed on the opposite side thereof. In this case, positioning of the PCB using only the power pins or the dummy pins may cause an error. In addition, when soldering is performed, the error may be further increased in the process.

Therefore, first, after determining the position of the PCB, such soldering is preferably made. For this purpose, the motor according to the present invention preferably includes a positioning boss 118.

The positioning boss 118 is preferably provided in plurality in order to more accurately determine the engagement position of the PC 200. 2 shows an example in which two positioning bosses 118 are formed. These positioning bosses may perform a function of determining the coupling position of the PCB, and the function of allowing the PCB 200 to be coupled with the mold unit 130. Therefore, it is preferable that the positioning bosses 110 are formed opposite to each other, and the position of the positioning boss 110 is determined in relation to the power pins described above. This is illustrated in FIG. 2.

On the other hand, it is preferable that the positioning boss 118 is also made integral with the insulator 121. That is, the positioning boss 118 is also formed when forming the insulator. Since the positioning boss 118 is also coupled to the positioning grooves 221 to the positioning holes formed in the PC, it is preferable that the positioning boss 118 is formed to be exposed to the outside of the mold 130.

In addition, the PCB and the positioning boss 118 are not electrically connected. That is, no electrical pattern is formed in the positioning groove 221. The PC is first coupled to the positioning boss, and then soldering is performed. Therefore, it is preferable that the positioning boss is forcibly fitted into the positioning groove 221.

When the mold unit 130 and the PC 200 are coupled, it is preferable that a constant interval is maintained between them. This is because pins such as electronic elements are inserted into the lower surface of the PC 200 to protrude. Therefore, it is preferable to prevent the PC 200 from being directly seated on the upper opening surface 133 formed on the upper opening 131 of the mold 130.

Therefore, since pins or electrical patterns such as electronic devices are not formed at the outer surface of the PCB 200, a stepped portion 134 for forming a gap between the PC 200 and the open surface 133 is preferably formed. Do. Of course, the stepped portion 134 is preferably formed on the outer surface of the open surface 133.

On the other hand, the step portion 134 is preferably formed to have a plane of a certain area. This is because the plane of the stepped portion 134 may be firmly fixed by being in surface contact with the lower surface of the PC 200. In addition, the pins 113, 114, 115, and 116, the pin, and the positioning protrusion described above may also be formed in the stepped part 134. Through this, the mold unit 130 and the PC 200 may be more stably coupled, and the coupling position may be accurately determined.

Hereinafter, the rotor assembly of the motor according to the present invention will be described in detail with reference to FIG. 1.

The rotor assembly 300 may include a rotor 310 and a rotation shaft 313. The rotor 300 may include a rotor core 312. Here, the rotor 300 may be formed in various forms, as shown in Figure 1 may be a permanent magnet rotor 300 is attached to the permanent magnet 310 along the outer periphery. In addition, a rotation shaft 313 is provided at the center of the rotor core 312, and in general, the rotation shaft 313 may be provided to penetrate the rotor core 312.

 Meanwhile, the rotor assembly 300 may be rotatably provided in the stator assembly 100. In this case, the motor according to the present invention may be referred to as an inner rotor type motor. In this case, the stator core 111 will have a hollow in which the rotor can be located.

In addition, a bearing 314 may be included as a structure for supporting the rotor assembly 300 to be rotatable with respect to the stator assembly 300. The bearing 314 is coupled to the upper 410 or the lower bracket 420 to be described later, so that the rotor assembly is rotatably supported. In addition, the bearing 314 is combined with the upper 410 or the lower bracket 420 also serves to prevent the rotor assembly 300 is moved to the rotation shaft 313.

Hereinafter, a manufacturing method of a motor according to the present invention will be described in detail with reference to FIG. 1.

First, the stator assembly 100 and the rotor assembly 300 are formed. Of course, the PC 300 will also be formed. After forming the configurations, assembly of the motor will be made.

First, the PCB 200 is seated on the top of the stator assembly 100. That is, the PC 200 will be seated through the upper opening 131 of the stator assembly 100. Here, the size or shape of the upper opening 131 may be formed to correspond to the size or shape of the PC 200. That is, since the opening part 131 is for the PCB ratio combining, it is not necessary that the size of the opening part 131 is large when the PC ratio is small.

In addition, a through hole 230 is formed at the center of the PC 200, for the rotation shaft 313 to pass through. In this case, the size of the through hole 230 may be sufficient to allow the bearing 314 to pass through without being interfered with the PC 200 even if the rotating shaft 313 is vibrated. That is, since the rotor assembly is not coupled from the top of the PC 200, the size of the through hole 230, especially the inner diameter is preferably smaller than the size of the rotor 310, particularly the outer diameter.

Thereafter, when the stator assembly 100 and the PC 200 are coupled, the upper bracket 410 is coupled to the stator assembly 100 to seal the upper opening 131. However, the seal here means to isolate the inside of the stator assembly 100 from the outside, but is not only a seal in the sense of completely blocking the inflow of air or moisture.

After the coupling of the stator assembly 100, the PC 200, and the upper bracket 410 is completed, the rotor assembly 300 is inserted through the lower opening 132 of the stator assembly 100. That is, since the direction in which the PC 200 is coupled to the direction in which the rotor assembly 300 is coupled is opposite, the interference is not interfered with each other. Therefore, the fear of damage to the PCB due to the rotor assembly 300 is prevented.

When the rotor assembly is inserted, the position of the rotor assembly 300 is determined through the bearing 314, and then the lower bracket 420 seals the lower opening 132 of the stator assembly 100. In addition, in order to prevent movement in the axial direction of the rotor assembly, the ring (E-ring) is fitted to the end of the rotation shaft 313.

In addition, as necessary, the upper bracket 410 and the lower bracket 420 may be combined with a cushion (510, 520) made of a rubber material for preventing vibration.

On the other hand, according to the present invention, since the coupling direction of the PC 200 and the rotor assembly 300 is different, there is an advantage that can magnetize the permanent magnet 311 of the rotor 310 and immediately assemble the motor. That is, after combining the PC 200 and the stator assembly 100, and after permanent magnet magnetization, it is possible to immediately combine the rotor assembly to the stator assembly 100 to complete the assembly of the motor.

Therefore, since the subsequent process for assembling the motor after the permanent magnet magnetization can be minimized, foreign matters can be prevented from being attached to the permanent magnet 310, and when the permanent magnet magnetized rotor assembly 300 is combined. Damage to the PC 200 can be prevented in advance.

In addition, since the rotor assembly 300 is assembled after the PC 200 is assembled, the combination of the PC and the stator assembly is very easy. This is because, after first coupling the rotor assembly 300 to the stator assembly 100 and then coupling the PC 200, the subsequent process after the rotor magnetization increases accordingly. In addition, the relationship between the magnetized permanent magnet 310 and the damage of the PC 200 is generated, because the workability will be very poor.

Hereinafter, the dummy blood 117 described above will be described in detail.

As described above, the motor according to the present invention may include a power pin 113, 114, 115, 116 electrically connected to the coil and connected to an external power source. In addition, the dummy pin 117 may be further included in the same form as the power pin. Here, the dummy pin 117 is not electrically connected to the coil 119. Of course, the electrical connection with the coil 119 may be made as necessary.

The dummy pin 117 is to perform a function to be stably coupled to the stator assembly 100 with the plurality of power pins PC 200.

On the other hand, the dummy pin 117 may be electrically connected to the PC 200, like the power pins. In this case, the dummy pin 117 may perform a function of grounding the stator core 111. That is, the stator core 111 may be electrically connected to form a ground structure through the PC 200 and the connector 230.

This ground structure will be described in detail with reference to FIG. 6.

First, the dummy pin 117 may be formed to penetrate the insulator 112 like the other power pins 113, 114, 115, and 116. In addition, one end may be located in the mold 130 and the other end may be exposed to the outside of the mold 130.

Here, one end of the dummy pin 117 is electrically connected to the stator core 111. Such an electrical connection method may be implemented in various ways. For example, one end of the wire may be electrically connected to one end of the dummy pin 117, and the other end of the wire may be soldered to the stator core 111.

However, torsion springs 600 may be provided for easier electrical connection. A center of the torsion spring 600 may be inserted into the other end of the dummy pin 117, and both ends of the torsion center may extend upward to contact the stator core 111. That is, in the contacted state, since both ends of the torsion spring 600 are elastically deformed, the contacted state may be maintained by the elastic force. Of course, the torsion spring 600 should be formed of a conductor.

Meanwhile, in order to more reliably maintain electrical connection between both ends of the torsion spring 600 and the stator core 111, a pocket part 610 may be formed in the stator core 111. By inserting both ends of the torsion spring 600 into the pocket part 610, the torsion spring 600 may be effectively prevented from falling off the other end of the dummy pin 117 during the mold part 130. Of course, both ends of the torsion spring will be inserted into the pocket 610 after the elastic deformation, the electrical contact will be maintained by the elastic force.

In order to more reliably prevent the torsion spring from falling out, both ends of the torsion spring 600 completely pass through the pocket part 610, and the penetrated portion may be bent. In this case, the torsion spring may be prevented from falling out regardless of which direction the mold part 130 is formed in the stator 110.

Therefore, the stator core 600 is electrically connected to the torsion spring 600 through the structure, and the torsion spring is electrically connected to the dummy pin 117 again, so that the ground structure of the stator core 111 is provided. It is possible to form. And, if necessary, one end of the dummy pin 117 is electrically connected to the PC 200, the ground structure may be completed through the electrical pattern formed on the PC and the connector (see FIG. 7, etc.).

5 shows five connector connections 240 formed in the PC, and FIG. 7 shows a connector 230 in which five wire slots 232 are formed. That is, these five connector connections and wire slots can be regarded as configurations for u, v, w power supplies, neutral points, and ground points, respectively.

Therefore, according to the motor according to the present invention, it is possible to easily form the ground structure through the dummy pin 117 and the connector 230.

Hereinafter, the bracket of the motor and the coupling structure of the bracket and the mold unit according to the present invention will be described in detail with reference to FIGS. 7 to 10.

First, as shown in Figure 1, the upper bracket 410 and the lower bracket 420 may be formed of the same shape, the same material. That is, the size may be different depending on the size of the upper opening 131 and the lower opening 132, the shape may be the same. Therefore, the coupling structure with the mold 130 may also be the same.

Therefore, hereinafter, only the upper bracket structure 410 and the coupling structure of the bracket and the mold part will be described for convenience of description.

In the motor according to the present invention, the upper bracket 410 is preferably formed of a metal material. The upper bracket may be formed by pressing any one of, for example, an iron sheet, a steel sheet, or a stainless steel sheet.

The upper bracket 410 covers the upper opening 131 of the mold 130 to isolate the inside of the motor from the outside. That is, a part of the side surface and the upper surface of the outside of the motor is occupied by the mold unit 130, and the upper portion of the upper surface is occupied by the upper bracket 410. Of course, a portion of the lower surface of the outside of the motor is occupied by the lower bracket 420.

On the other hand, the conductive part is mounted on the upper portion of the PC 200. That is, the conductive part is mounted at a predetermined distance on the upper surface of the PCB, and the distance between the conductive part and the lower surface of the upper bracket 410 is narrowed. Of course, this distance can be increased by increasing the height of the upper bracket 410, in this case there is a problem that does not satisfy the compact motor because the height of the overall motor is increased. Therefore, the height of the upper bracket 410 is preferably formed to be at least the same as the height of the mold 130.

In the center of the upper bracket 410, it is preferable that a bearing accommodating portion 450 in which the bearing 314 is accommodated is formed. That is, the bearing 314 is accommodated in the bearing accommodation portion 450 so that the rotor assembly 300 is rotatably supported with respect to the stator assembly 100. In addition, movement of the rotor assembly 300 in the direction of the rotation axis 313 is limited.

Here, vibration is generated as the rotor assembly 300 rotates, and the vibration is transmitted to the bearing accommodation portion 450 through the bearing 314. Therefore, there is a fear that vibration may occur in the upper bracket 410, and noise may be generated by such vibration. This is because the upper bracket 410 is formed of a metal plate, etc., because it is likely to generate noise due to tremor.

Therefore, the upper bracket 410 of the motor according to the present invention is preferably formed to have a large rigidity in order to minimize such vibration and noise. However, rather than increasing the thickness of the upper bracket 410, it is more preferable to increase the rigidity by forming the rib 420 and the like. It is possible to provide a motor having improved weight and rigidity and improved vibration and noise characteristics through the ribs 420 and the like. In addition, it will be possible to provide a motor having improved heat dissipation characteristics through such ribs 420.

On the other hand, the rib 420 is preferably formed to be recessed downward from the upper surface of the upper bracket 410. This is because, when formed to protrude upward, the height of the overall motor increases, making it difficult to satisfy the requirements of the compact motor. However, the distance between the upper bracket 410 and the upper surface of the PCB is narrowed by the recessed rib 420. In particular, the distance from the energization unit 210 mounted on the PC 200 is inevitably narrower.

The energization unit 210 may be a power device (for example, a switching device for an inverter). Since the power device is a current flowing device, it is necessary to solve the fear of leakage. Therefore, as described above, a sufficient insulation distance from the upper bracket 410 formed of the conductor should be ensured.

Therefore, in the motor according to the present invention, it is preferable that ribs 410 recessed downward in only a portion of the upper surface of the upper bracket 410 are formed, and ribs 410 not formed in a portion thereof.

For example, a plurality of ribs 410 may be formed radially as shown in FIG. 8. In addition, although not shown, a plurality of circumferential ribs having a predetermined radius may be formed. In addition, a plurality of such circumferential ribs may be formed along the radial direction.

In other words, the ribs 420 are preferably formed only in the remaining portions except for the portion facing the energizing portion, and the shape and arrangement of the ribs 420 may be variously modified. In addition, the ribs 420 may be formed at the same time when the upper bracket 410 is formed through the press working.

Meanwhile, as illustrated in FIGS. 7 to 10, the energization unit 210 may be located at the outer shell of the PC 200. Therefore, in this case, the rib 420 may not be formed in a predetermined angle section along the circumferential direction of the upper bracket 410. Of course, the predetermined angular section will be determined corresponding to the circumferential width of the energization portion 210. Here, the portion where the rib is not formed is referred to as a planar portion 460 for convenience of description.

Therefore, in order to secure an insulation distance between the upper bracket 410 and the energization part 210, the flat part 460 should be positioned to face the energization part 210. That is, when the upper bracket 410 is coupled to the upper portion of the mold 130, the flat portion 460 should be coupled to face the current conducting portion 210 immediately.

To this end, in the motor according to the present invention, the upper bracket is made to include a positioning unit 231, 430 to be coupled to the mold 130 only at a specific position. That is, the positioning unit is provided in the upper bracket 410 and the mold unit 130 so that both are coupled only at a specific position, that is, the plane portion 460 facing the conducting unit 210. Perform.

The positioning part may have a shape of the upper opening 131 of the mold part and a shape of the upper bracket 410 corresponding to the shape. For example, when one protrusion 231 protruding in the radial direction is formed in the upper opening 131 of the mold part, one groove cut radially from the outer circumference of the upper bracket to accommodate the protrusion. 430 may be formed. This structure is shown in FIG. Of course, the protrusion 231 may be formed in the upper bracket 410, and the groove 430 may be formed in the mold 130.

Meanwhile, the motor according to the present invention may further include a connector 230 coupled to the mold unit 130 and the PC 200 to be connected to an external power source. In this case, one end of the connector 230 is located outside the mold 130, and the other end is located inside the mold 130. To this end, as shown in FIGS. 3 and 5, the connector coupling part 135 for coupling with the connector 230 is preferably formed at the upper portion of the mold part 130. The connector coupling part 135 may be formed in a form in which the upper portion of the mold part 130 is cut out. Therefore, it is preferable that the upper shape of the connector 230 is the same as the outer shape of the mold part 130 forming the upper shape of the mold part 130, especially the upper opening part 131.

In addition, some of the above-described positioning parts 231 and 430 may be formed in the connector 230 instead of the mold part 130. More specifically, it is more preferable that the mold part 130 positioning part of another part is formed. This is because the positioning unit is configured to couple the upper and upper brackets of the mold unit 130 only at a specific position, and therefore it is easier for the assembler to grasp the specific position in advance and assemble it. In other words, the specific position of the upper bracket 410 can be easily identified in the assembling process (for example, through the above-described flat portion or groove), but it may not be easy to identify the specific position of the upper portion of the mold portion. to be.

Therefore, if the positioning unit in the connector 230, the specific position of the upper portion of the mold will be easily identified through the connector 230.

Hereinafter, the coupling structure of the mold 130 and the upper bracket 410 will be described in detail with reference to FIGS. 9 to 10.

The upper opening 131 is formed on the mold 130 of the motor according to the present invention as described above. That is, the inside of the stator assembly 100 communicates with the outside through the upper opening 131. The upper bracket 410 seals the upper opening 131. Here, the upper bracket 410 is forcibly fitted to the opening portion 131 as in a general motor, it is possible to be forced to be combined. However, in this case, there is room for moisture to flow through the opening 131. Therefore, a coupling structure of the mold 130 and the upper bracket 410 is required to prevent the inflow of water.

To this end, the upper opening 131 of the motor according to the present invention has a predetermined flat portion (step) so that the upper ends of the inner inner wall 136 and the inner inner wall 137 having different inner diameters are different from each other on the upper portion of the mold 130. 138). That is, the upper end of the outer inner wall 137 is formed higher than the upper end of the inner inner wall 136. Therefore, it can be said that a predetermined portion of the planar portion 138 is formed as an upper end of the inner inner wall 136.

On the other hand, since the upper bracket 410 is formed to cover the upper opening 131, its shape should be formed to correspond to the shape of the upper opening 131. Therefore, when the upper opening 131 is formed in a circular shape, the upper bracket 410 should also be formed in a circular shape.

Here, the outer diameter of the upper bracket 410 is preferably smaller than the inner diameter of the outer wall of the opening portion 131 of the mold 130. Of course, the outer diameter of the upper bracket 410 should be larger than the inner diameter of the inner inner wall of the opening 131 of the mold 130.

Meanwhile, a portion of the radial end 441 of the upper bracket 410 is seated on the flat portion 138. Since the outer diameter of the upper bracket 410 is smaller than the inner diameter of the outer inner wall 137, a gap d of a predetermined distance is formed between the radial end 441 of the bracket 410 and the outer inner wall. Although not shown, a resin is applied to the gap d.

Here, the resin material performs a function of coupling the mold unit 130 and the bracket 410 and also prevents moisture from penetrating into the inside through the gap d. Therefore, the resin material may be formed of various materials that can satisfy these characteristics. For example, the resin material may be an epoxy resin or a silicon material.

In addition, it is preferable that the groove 139 is formed along the circumferential direction in the outer portion of the planar portion 138 so that a sufficient amount of the resin material may be applied to the gap d. That is, the resin may be applied to the thickness of the bracket 410 or more through the groove 139. In addition, since the resin material in an amount corresponding to the depth and width of the groove 139 may be sufficiently applied, the moisture penetration prevention function and the coupling function may be further enhanced. Of course, the resin may overflow and may prevent appearance defects and bonding defects in advance.

Further, as shown in FIG. 10, the width of the groove 139 is more preferably larger than the width of the gap. Because the gap (d) is formed on the lower side of the gap is formed larger than the gap is that the resin is applied to a certain portion of the lower surface as well as the thickness of the radially opposite end 441 of the bracket 410 Because it is possible. Therefore, the area of the resin material in contact with the upper bracket 410 or the upper opening 131 can be further increased. Through this, the water penetration prevention function and the coupling function may be further enhanced.

The motor according to the present invention may further include a connector 230 as described above. The connector 230 is coupled to the PC 200 fixed inside the mold 130 to perform a function of supplying external power to the PC 200. In addition, the connector is coupled to the connector coupling portion 135 formed on the mold portion 130. Therefore, the upper shape of the connector 230 is preferably formed to be the same as the shape of the opening 131. Through this, since the bracket 410 is coupled not only to the mold part but also to the connector 230, the connector 230 may be more firmly fixed to the mold part 130. Of course, due to the positioning portion (for example, the protrusion 231 formed in the connector) of the bracket described above, the shape to some extent may vary.

On the other hand, the motor according to the present invention has been described above that the lower opening 132 as well as the upper opening 131 may be further formed in the mold 130. Here, the coupling structure of the lower opening 132 and the lower bracket 420 may also be the same as the structure described above. However, it may not necessarily be the same if there is no fear of moisture penetration through the lower bracket. On the contrary, if there is a fear of moisture penetration only through the lower bracket 420, the above-described structure may be applied only to the lower bracket 420 coupling structure.

The mold openings 131 and 132 and the brackets 410 and 420 of the motor according to the present invention have an interference fit structure or a forced indentation structure together with the above-described structure for preventing water penetration (hereinafter referred to as "mechanical coupling structure"). It may be made to include). That is, the bracket may be mechanically coupled to the opening first, and then the above-described resin coating may be performed.

Such a mechanical coupling structure performs a function of uniformly forming the aforementioned gap d along the circumferential direction of the bracket, and also prevents the bracket from being moved when the resin is applied.

In this case, the mechanical coupling structure may be formed through the bent portion 440 inserted into the inner inner wall 136 and the inner inner wall 136. The bent portion 440 may be formed to be bent downward in the radial direction of the radial ends of the bracket (410, 420). That is, the bent portion 440 is inserted into the inner inner wall 136 so that the bracket is first fixed to the mold portion 130.

Meanwhile, the bent portion 440 may also be formed along the circumferential direction of the brackets 410 and 420 to increase the rigidity of the bracket.

According to the present invention described above, the following effects can be obtained.

First, according to the present invention, it is easy to manufacture and can form an external appearance compactly.

Second, according to the present invention it is possible to provide a safer and easier to use motor because the stator is wrapped in a mold of an insulating material.

Third, according to the present invention can provide a motor that can be easily coupled to the PCB in the correct position with respect to the stator assembly, and can provide a higher reliability to the electrical connection by preventing damage to the coil when forming the mold portion.

Fourth, the present invention can provide a motor with improved reliability by preventing defects that may occur during manufacture and use, and can also provide a motor with improved durability.

Fifth, since the permanent magnet magnetization of the rotor can be carried out in the last possible step in the manufacturing step of the motor, it is easy to manufacture, it is possible to minimize the problems that can occur during the manufacturing process.

Sixth, since the coupling direction of the rotor assembly and the coupling ratio of the PCB in the manufacturing step of the motor is different, the interference with the PCB when the rotor assembly is minimized.

Seventh, it is possible to improve the noise and vibration characteristics due to the strength reinforcement by forming a rib in the bracket, and also to determine the coupling position of the bracket to provide a more reliable motor by securing the PCB ratio and the insulation distance.

Claims (10)

A stator assembly including a stator and a mold part, the stator assembly having an opening formed thereon; A current carrying portion mounted on an upper surface of the PCB and seated on an upper portion of the stator assembly; And An upper bracket coupled to the stator assembly to seal an upper opening of the stator assembly, A portion of the upper surface of the upper bracket is formed with a strength reinforcing rib, The planar portion of the upper bracket on the top of the strength reinforcement ribs is not formed, characterized in that the motor is located on the upper portion. The method of claim 1, The upper bracket is formed of a metal material. The method of claim 2, The upper bracket is a motor, characterized in that formed by pressing any one of the steel sheet, steel sheet or stainless steel sheet. The method of claim 1, The strength reinforcing rib is a motor, characterized in that formed in the upper surface of the upper bracket. The method of claim 4, wherein And said strength reinforcing rib is formed in a radial direction. delete The method of claim 1, And a positioning unit for allowing the upper bracket to be engaged with the stator assembly only when the planar portion is positioned above the energizing portion. The method of claim 7, wherein And a connector provided at a side of the stator assembly to supply external power to the PC. The method of claim 8, The positioning unit, A groove formed in the upper bracket; And And a protrusion formed in the connector to correspond to the groove. The method of claim 8, The positioning unit, A protrusion formed on the upper bracket; And And a groove formed in the connector to correspond to the protrusion.

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