KR20100030176A - Fan motor - Google Patents

Abstract

PURPOSE: A fan motor is provided to preventing inflow of a chip into the diameter of a fan motor by expanding a molding covering a printed circuit board of a stator assembly to a lower bracket of the lower part bearing assembly. CONSTITUTION: A stator is comprised of a core(152), a coil, and an insulator(151) insulating the coils. A molding unit(154) is formed in order to protect the outside of the stator. An upper bearing assembly(140) and a lower bearing assembly(160) are respectively combined in the top and bottom of the stator. A rotating shaft is penetrated through the upper bearing assembly and the bottom bearing assembly and is rotatable. A fan is placed in outer side of the stator and is formed to be one body with the stator.

Description

Fan motor {FAN MOTOR}

The present invention relates to a fan motor, and more particularly, when molding a stator, the molding structure is radially widened to the lower bracket of the lower bearing assembly to prevent the chip from penetrating into the fan when the fan is connected to the product. It's about a motor.

In general, a fan motor refers to a device for rotating a rotor by electromagnetic interaction between a stator and a rotor and transmitting the rotational force to the outside. The fan motor is used as a means for blowing air by the rotational force of the rotor, and is widely used in refrigerators, air conditioners, and vacuum cleaners.

A motor is a device for rotating a rotor by electromagnetic interaction between a stator and a rotor and transmitting the rotational force to the outside. Here, the rotational force of the rotor drives the load through the rotation shaft.

Usually, there is an inner rotor type motor in which the stator is located outside, and an out rotor type motor in which the stator is located inside.

Meanwhile, the stator 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.

The rotational force of the rotor is transmitted to the rotating shaft, and the fan connected to the rotating shaft rotates. At this time, the vibration generated in the rotor is transmitted to the fan to generate noise, resulting in a decrease in durability of the fan motor.

Referring to the accompanying drawings, the rotating shaft and the fan in the conventional fan motor as follows.

1 is a view showing a conventional fan motor. In the conventional fan motor 1, a stator, a rotor, a coil, and the like are provided in a casing 20 forming the exterior of the motor, and a rotating shaft connected to the rotor is connected to the outside of the casing 20. Thus, the end of the rotating shaft is connected to the fan 10 to form a fan motor 1.

However, in such a fan motor 1, the total volume of the fan motor becomes large. That is, the length from the casing 20 to the front of the fan 10 becomes long, thereby increasing the space occupied by the fan motor 1. The compactness is an important part in home appliances, but if the size of the fan motor is large, there is a problem that the space efficiency is lowered when it is attached to other products.

In addition, the rotating shaft 30 is formed long to prevent the balance when coupled to the hub 12 inside the fan. That is, it is also very important to catch the concentric shaft 30 and the fan 10, if the fan 10 does not achieve concentric noise is generated in the rotating fan 10, the non-uniform rotation of the fan 10 It also affects the rotor and the motor connected to and affects the durability of the fan 10 and the motor. In particular, in the resonance state, the influence on the rotor and the motor is also increased.

      This is because the rotor and the fan are rotating members, and it is difficult to fix the rotating shaft to the groove inside the hub of the fan, and the long rotating shaft 30 is difficult to concentric with the fan 10. Therefore, there was a problem that it is difficult to solve the noise and vibration generated when the fan 10 is fixed and rotated to the rotation shaft 30.

The present invention provides a fan motor in which a molding part covering the PCB of the stator assembly of the fan motor is formed to the lower bracket fastening groove of the lower bearing assembly so that chips generated in the bolt and the lower bracket do not flow into the fan motor having permanent magnets. For the purpose of

The present invention includes a stator comprising a core, a coil wound around the core, and an insulator for insulating the core and the coil; a molding part formed to surround the outside of the stator; an upper bearing assembly and a lower bearing assembly respectively coupled to upper and lower portions of the stator. And a fan connected to a rotating shaft rotatably supported through the upper bearing assembly and the lower bearing assembly, the fan being integrally formed and rotating with the rotor at the radially outer side of the stator, wherein the molding part has a radius of the lower bearing assembly. It provides a fan motor, characterized in that more than the radius to the fastening hole formed in the lower bracket.

In addition, the present invention provides a fan motor, comprising a molding unit;

In addition, the molding unit provides a fan motor, characterized in that the receiving groove for receiving the fastening member is formed when the lower bracket is coupled through the fastening hole by the fastening member.

In addition, the present invention provides a fan motor, characterized in that the fastening portion located in the molding portion forms a stage in the lower bracket direction.

In addition, the present invention provides a fan motor, characterized in that a gap exists between the lower bracket and the molding part to a part of the distance from the stator center to the receiving groove.

The present invention also provides a fan motor, wherein the molding part forms a slot for connecting the PC or coil with an external power line or control line.

The fan motor provided by the present invention can prevent the generation of noise by preventing the iron chips generated from the screw and the bracket from penetrating toward the fan inner diameter when coupled to the product.

In addition, the fan motor provided by the present invention can increase the durability of the fan motor by preventing the chip generated from the screw and the lower bracket to penetrate into the motor.

In addition, the fan motor provided by the present invention forms a receiving groove in the fastening portion to which the fastening means is fastened so that the chip does not move because the chip is located only inside the receiving groove.

In addition, the fan motor provided by the present invention has a chip only inside the receiving groove so that the chip does not flow into the fan inner diameter can eliminate the generation of noise by the chip.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a perspective view showing an overall disassembled state of the fan motor. Specifically, the fan motor 100 is a stator causing electromagnetic interaction with the rotor 120 made of the rotor frame 121 and the permanent magnet, the upper bearing assembly 140 coupled to the upper and lower portions of the stator, and It consists of a fan covering the lower bearing assembly 160, the stator and the upper bearing assembly 140.

In addition, one end of the rotating shaft 130 and one end of the rotating shaft 130 are press-fitted into the shaft hole 115 of the fan hub 112 and supported by the upper bearing assembly 140 and the lower bearing assembly 160. The shaft hole 115 is to be fitted.

The rotor 120 wraps the stator in the radial direction and generates a rotational force by electromagnetic interaction with the stator. The rotor 120 has a permanent magnet 122 is attached to the inner peripheral surface of the rotor frame 121. In this case, the permanent magnet 122 may be cylindrically coupled to the inner circumferential surface of the rotor frame 121, and may be attached and discontinuously formed like a bar magnet.

On the other hand, the inner circumferential surface of the rotor frame 121 may be formed in a step so that the permanent magnet 122 can be coupled. In addition, a large position fixing end 115 is formed in the longitudinal direction on the stepped portion or the inner circumferential surface of the rotor frame 121 can perform a function as a stopper of the permanent magnet 122.

The rotor frame 121 may be manufactured integrally with the fan 110 inside the hub of the fan or may be coupled by an adhesive means. The permanent magnet 122 is coupled to the inner circumferential surface of the rotor frame to function as the rotor 120.

As a result, the rotation shaft 130 is supported by the rotation shaft receiving portion 31 of the hub 112 to serve to concentrically rotate the rotation shaft 130. The rotating shaft 130 is pressed into the rotating shaft receiving portion 31 of the rotor or is coupled by an adhesive means.

The stator includes a stator core 152, a coil wound around the stator core, and an insulator 151 that insulates the core and the coil. The insulator 151 is made of an insulating material and may be coupled to the upper and lower portions of the stator core 152. A coil is wound around the stator core 152 through the insulator 151, and insulation between the stator core and the coil is performed.

The fan motor 100 may include a PC 153 to control the driving of the motor. Various electrical patterns are formed in the PCB 153, and the insulator 151 is coupled to an upper portion of the PCB 153. Insulation between the core 152 and the PCB 153 is performed through the insulator 151.

In addition, after the stator core 152, the insulator 151, the coil, and the PC 153 are all coupled, they are preferably formed to be all wrapped by the molding unit 154. The stator assembly 150 in which the molding part 154 is formed may be protected from external environment and impact in a humid place such as a refrigerator.

The upper bearing assembly 140 is press-fitted into the top of the stator assembly 150, the felt 143 containing the bearing holder 142 and the oil and the upper bracket 141 and the intermediate bracket 145 covering the bearing 144 ) Here, the bearing 144 is preferably a bearing 144 formed by sintering, more preferably an oilless bearing. The holder 142 preferably positions or restricts the position of the bearing 144 and preferably has a slit radially formed for circulating the oil contained in the felt 143 to the top of the bearing 144.

 On the other hand, the bearing 144 is a configuration for supplying the bearing oil for a smooth function is preferably provided with a felt 143 containing the bearing oil in the bearing assembly 140. A bearing is provided in the radially inner side of the felt 143, and bearing oil is supplied to the bearing 144 through the felt 143.

The lower bearing assembly 160 is substantially the same in shape and function as the upper bearing assembly 140. However, it is preferable that the lower bearing assembly 160 further includes a lower bracket 161 to couple to the product. The lower bracket 161 is provided with a plurality of coupling holes 167 for coupling to the product. In addition, the lower bracket 161 has a slot 168 is formed to connect the external wires with the PC 153.

One end of the rotation shaft 130 is inserted into the shaft hole 115 of the hub 112, and the other end penetrates through the lower bracket 161. In addition, a groove 131 is formed around the rotation shaft 130. A stop ring 132 and oil cutters 133 and 135 are fitted into the groove. The stop ring 132 fixes the position of the fan and may be located inside or outside the shaft hole 115. The oil cutters 133 and 135 of the fan hub are in close contact with the upper bracket 141 and the lower bracket 161 to prevent the bearing oil from scattering on the rotating shaft 130.

The fan 110 rotates by receiving the rotational force transmitted by the rotor to blow. The rotating shaft 120 is fitted to the shaft hole 115 by a forced indentation method, and an adhesive means may be applied to reinforce the bonding force. The shaft hole 115 forms an end portion in the outward direction of the fan 110 so that one end of the rotating shaft may be coupled and supported to hold the concentricity of the shaft. In addition, the rotating shaft receiving portion 131 that can support the rotating shaft 130 is formed in the inner surface direction of the fan hub 112 can support the rotating shaft.

3 is a view showing the coupling between the insulator and the core. 4 is an exploded view of the stator assembly and the bearing assembly.

First, the stator assembly comprises a core 152 and an insulator 151. A coil is wound around the core 152 through the insulator 151, and insulation between the core 152 and the coil is performed. The insulator 151 is made of an insulating material and may be coupled to the upper and lower portions of the core 152. In addition, the core 152 and the insulator 151 may be integrally formed by insert injection, and the core 152 may be formed by being pressed into the insulator 151.

The stator 153 on which electrical elements are mounted may be connected to the stator. The PC 153 controls the driving of the motor, and various electric elements are combined. The PC 153 may be coupled to the top or bottom of the stator, and coupled to the stator to electrically insulate through the insulator 151. The insulator 151 may include a coupling part 156 for connecting with the PCB 153.

The insulator 151 is provided with a coupling part 156 for coupling with the PC 153, and the PC 153 is fixed through the coupling part 156. In this case, the coupling part may be formed in various shapes, for example, a rod-shaped protrusion 156, a hook shape, and the like. A plurality of rod-shaped protrusions are formed, and holes are formed in the PCB 153 so as to correspond thereto. The rod-shaped protrusion 153 may be pressed into the hole or coupled by bonding. Rod-shaped hooks are hook-shaped and formed in plural and have sufficient coupling force. In addition, the hook is hooked to the arc formed in the center of the PCB 156 without bonding. The key hole 158 is formed in the longitudinal direction of the insulator inner diameter. The key hole 158 serves to provide a reference point when winding the coil to the core in the three-phase motor.

The stator and the PC 153 thus formed are preferably covered by mold injection. Fan motors are used in various fields such as refrigerators, air conditioners, fans, etc., and are exposed to short circuits and damages when exposed to moisture and the external environment. Therefore, it is surrounded by the molding unit 154 to protect the stator and the PC 153 from moisture or external pressure. The molding part 154 may be formed in various shapes and materials, and may be covered on the entire part except the core 152 part.

An upper end of the molding part 154 surrounding the portion of the PC 153 may form a depression 154a, which is a portion corresponding to the rotor frame when the stator assembly 150 is combined with the rotor frame. It is formed along the circumferential direction. The depression 154a is formed to prevent water from entering the stator assembly 150.

In addition, the molding part 154 may form a chamfer 154b. When the hub of the fan covers the stator assembly 150, the gap between the hub inner surface of the fan and the molding part 154 is narrowed. At this time, since the noise may occur when the fan rotates, it is preferable to form the chamfer 154b in the molding part 154.

Bearing assemblies 140 and 160 are coupled to upper and lower portions of the stator assembly 150 surrounded by the molding unit 154. The bearing assemblies 140 and 160 are press-fitted into the inner diameter of the stator assembly 150. The upper bearing assembly 140 fitted to the top of the stator assembly 150 is coupled to correspond to the position fixing portion 157 formed on the top of the stator assembly 150. By the position fixing portion 157, the upper bearing assembly 140 is fixed without twisting or twisting.

The lower bearing assembly 160 is pressed into the bottom of the stator assembly 160. The intermediate bracket 165 of the lower bearing assembly 160 is fitted to the inner diameter of the stator assembly 150, and a plurality of coupling holes 167 are formed in the lower bracket 161 to be mounted on the product. In addition, a slot 168 is formed that can receive electric wires for connection with the PCB 153.

5 is a cross-sectional view of the stator assembly and the bearing assembly. The molding part 154 of the stator assembly 150 is covered to the fastening part 167 'of the lower bracket 161. In addition, the fastening part 167 ′ may form an end portion in the direction of the lower bracket 161 to contact and support the lower bracket 161. The fan motor is coupled to the product by a fastening means such as a bolt 170 through the fastening hole 167 of the lower bracket 161. In the fastening part 167 ′, an accommodation groove 155 may be formed to accommodate the fastening member. Receiving groove 155 may be simply formed in a recessed cylindrical shape, it may be formed so that the screw can be fitted corresponding to the thread of the bolt 170. Accordingly, chips generated from the bolt 170 or the lower bracket 161 cover the fastening hole 167 of the molding part 154 to prevent the chip from entering the inner diameter of the fan. In addition, by forming the accommodating groove 155 in the molding part 154, the chips move only in the accommodating groove 155, so that the chip is not moved.

In addition, the molding part 154 forms a step in the direction of the lower bracket 161 at the fastening part 167 ', and the end part is continuously formed in the circumferential direction. This end serves as a stopper when fastened to the lower bracket 161, and does not apply pressure to the PC 153 in the molding unit 154, thereby protecting the PC 153. The molding part 154 may be spaced apart from the lower bracket 161 by a predetermined distance from the center of the stator assembly 150 to the fastening part 167 ′ having an end portion. The interval t prevents the PCB 153 from applying pressure, thereby protecting the PCB 153.

6 is a perspective view illustrating the stator assembly. The molding part 154 of the stator assembly 150 is formed to cover the fastening hole 167 of the lower bracket 161 in the radial direction. The molding part forms the depression 154a and the chamfer 154b, covers the lower bracket 161, and is formed to correspond to the shape of the slot 168 of the lower bracket 161. As a result, the fastening means is accommodated in the receiving groove 155 of the molding part 154 of the stator assembly 150 such that chips generated in the fastening means and the lower bracket 161 are not introduced into the motor.

It is apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the present invention. Accordingly, such modifications or variations will be considered to belong to the claims of the present invention.

1 is a diagram illustrating a general fan motor.

2 is a diagram illustrating a total disassembly of a fan motor according to the present invention.

3 is a view showing the coupling of the insulator and the core according to the present invention.

4 is an exploded view of the stator assembly and the bearing assembly of the fan motor according to the present invention.

5 is a view showing a combination of the stator assembly and the bearing assembly according to the present invention.

6 is a view showing a combination of the stator assembly and the bearing assembly according to the present invention.

Claims (6)

A stator composed of a core, a coil wound around the core, and an insulator insulated between the core and the coil; A molding part formed to surround the outside of the stator; An upper bearing assembly and a lower bearing assembly respectively coupled to the upper and lower portions of the stator; and And a fan connected to a rotating shaft rotatably supported through the upper bearing assembly and the lower bearing assembly, the fan being integrally formed with the rotor at the radially outer side of the stator to rotate, wherein the molding portion has a lower bracket of the lower bearing assembly. Fan motor, characterized in that more than the radius to the fastening hole formed in the.        The method of claim 1, And a molding unit in which the molding parts have electrical patterns formed thereon.        The method according to claim 1 or 2, Molding part fan motor, characterized in that the receiving groove for receiving the fastening member is formed when the lower bracket is coupled through the fastening hole by the fastening member.        The method of claim 3,       A fan motor, characterized in that the fastening portion located in the molding portion forms a stage in the lower bracket direction. The method of claim 4, wherein A fan motor, wherein a gap exists between a lower bracket and a molding part to a part of a distance from a stator center to a receiving groove. The method according to claim 1 or 2, And the molding part forms a slot for connecting the PC or coil to an external power line or control line.

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