KR101100181B1 - Motor for direct driving type washing machine - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor of a direct type washing machine. In particular, even if the insulation between the stator coil of the motor and the rotor rotor frame is broken, the electric current does not flow to the washing shaft. It is to prevent an accident from occurring, and to increase the rigidity of the laundry shaft support member while reducing the vibration of the motor to be transmitted to the laundry shaft.

To this end, the present invention is a rotor (2) having a stator having a coil portion, a rotor frame made of metal provided with a magnet, a metal washing shaft (S), and between the metal washing shaft (S) and the rotor In a direct type motor for a washing machine having a washing shaft support member (3) to insulate and allow the rotational force of the rotor to be transmitted to the washing shaft of the metal material; The laundry shaft support member 3,

A shaft support portion 3a made of a resin material different from the washing shaft 4 and the vibration mode;

A motor structure of a direct type washing machine is provided, which is formed by a fastening part 3b extending radially from the shaft support part 3a and having a corrugation along the axial direction.

Direct type, washing machine, motor, insulation, laundry shaft support member, wrinkle

Description

MOTOR FOR DIRECT DRIVING TYPE WASHING MACHINE}

1 is a structural diagram of a driving unit of a conventional direct drum washing machine

Figure 2 is a structural diagram of the drive unit of the direct drum washing machine according to the present invention

3 is an enlarged view of a portion A of FIG.

Figure 4 is a perspective view showing the shape of the laundry shaft support member of the present invention

<Code Description of Main Parts of Drawing>

M-Motor

1-stator 11-bearing support

2-rotor 22-coupling hole

25-cooling fan 26-vent

27-Strength reinforcing convex part 28-Drainage hole

3-Washing shaft support member 3a-Shaft support

3b-fastener 21-rotor frame

The present invention relates to a motor structure of a direct type washing machine, and more particularly, to an improvement in the structure of a laundry shaft support member coupled to a bearing support and a rotor frame to maintain its spacing and supporting a laundry shaft.

1 is a structural diagram of a conventional drum washing machine comprising: a washing inner tank (I) and a washing outer tank (O) for washing contaminated laundry cleanly;

A washing shaft (S) having a serration portion (S1) formed at a rear end portion of the washing inner tank (I) to forward and reverse rotation and transmitting rotational force to wash the laundry;

It consists of a motor (M) for generating and transmitting a rotating force to the washing shaft (S).

And, the motor (M) and the stator (1) is fastened and fixed to the rear wall portion of the laundry outer tub integrally molded bearing bearing (11) coupled to the bearing (B) therein;

The rotor is installed on the outer circumferential surface of the stator 1 and rotates due to the electrode difference, and the coupling hole 22 and the fastening hole 23 are provided at predetermined equal intervals in the center thereof, and a rotor having ventilation holes 26 formed in a plurality of lower surfaces thereof. A rotor 2 made of a frame 21;

The rotational force of the rotor (2) is transmitted to the washing shaft (S) to maintain the distance between the bearing support 11 and the rotor frame 21, the coupling hole 22 of the rotor frame 21 on the lower surface Coupling protrusion 32 and the fastening hole 33 corresponding to the corresponding is formed at a predetermined equal interval and consists of a washing shaft support member 3 having a serration portion 31 therein.

Referring to the effect of the above configuration is as follows.

First, the motor M is rotated by the rotational force generated by the electromagnetic interaction between the stator and the rotor when power is applied to the stator 1, the rotor frame 21 of the rotor (2) Rotating the washing shaft support member (3) coupled to and fixed to the rotor at the same time the serration portion (31), (S1) formed inside the washing shaft support member (3) and the lower portion of the washing shaft (S) At the same time as the rotational force of 2) is transmitted to the washing shaft S, the washing inner tank I coupled to the upper portion of the washing shaft S also receives the rotational force and rotates to wash the laundry.

At this time, since the laundry shaft support member 3 coupled between the bearing support 11 and the rotor frame 21 is formed of an insulating resin material, the coil part and the rotor 2 of the stator 1 Even when the insulation between the rotor frame 21 is broken, since no current flows through the washing shaft S, current cannot flow in the wash water contained in the washing tub O, thereby preventing safety accidents.

In addition, the laundry shaft support member 3 reduces the vibration of the motor M and transmits the washing shaft S to the washing shaft S, thereby reducing the vibration of the washing tub and the noise thereof.

However, the conventional laundry shaft support member has a weak durability in terms of strength.

That is, when the resin shaft is simply made of a resin material, the laundry shaft support member is advantageous in terms of insulation performance and vibration reduction, but it is disadvantageous in terms of durability because it is advantageous in terms of insulation performance and vibration reduction.

In addition, when the laundry shaft support member is made of only a resin material, the thickness of each molding part becomes too thick, which takes a lot of time for cooling after injection molding and causes a difference in cooling speed in each part of the laundry shaft support member. There may be disadvantages in that precise molding is difficult to achieve.

The present invention is to solve and solve the above problems, and even if the insulation between the stator coil portion and the rotor rotor frame of the motor is broken to prevent the flow of current to the washing shaft to prevent the occurrence of a safety accident The purpose of the present invention is to effectively prevent the vibration of the motor from being transmitted to the washing shaft and to implement the motor structure of the direct type washing machine equipped with the washing shaft support member which can improve the formability and durability while saving the material. .

In order to achieve the above object, the present invention is to insulate between a stator having a coil portion, a rotor having a rotor frame made of metal provided with a magnet, a laundry shaft of metal, and the metal laundry shaft and the rotor; In addition, in the direct type motor for a washing machine having a washing shaft support member for transmitting the rotational force of the rotor to the washing shaft of the metal material; The laundry shaft support member,

A shaft support part as a resin material different from the washing shaft and the vibration mode;

There is provided a motor structure of a direct type washing machine, which is formed extending from the shaft support in the radial direction and formed with a fastening portion formed to have a corrugation along the axial direction.

According to this configuration, even if insulation is broken between the stator coil part of the motor and the rotor frame of the rotor, the current is transmitted to the washing shaft by the washing shaft support member, thereby preventing safety accidents. The vibration is transmitted to the washing shaft to block the noise is generated, while reducing the raw materials can also improve the durability of the washing shaft support member to have the effect of improving the reliability of the product to the user.

Hereinafter, the preferred embodiment of the present invention will be described in detail by the accompanying drawings.

Figure 2 is a structural view of the drive unit of the drum washing machine according to an embodiment of the present invention, Figure 3 is an enlarged view of a portion A of Figure 2, the drum washing machine to which the present invention is applied, the lower part to transmit the rotational force to the washing tank (I) And washing shaft (S) is formed with a migration unit (S1);

It consists of a motor (M) for generating and transmitting a rotating force to the washing shaft (S).

As shown in FIGS. 2 and 3, the motor M is assembled with a bearing support 11 having a bearing B coupled therein and fixed to a washing tub O (see FIG. 1). 1) and;

It is installed on the outer circumferential surface of the stator 1, rotated by the electrode difference, and the coupling hole 22 and the fastening hole 23 are formed at predetermined equal intervals, and the hub portion protruding at the center thereof is provided, and a plurality of lower surfaces thereof A rotor (2) formed of a rotor frame (21) having a ventilation hole (26) and a cooling fan (25) formed therebetween, and a strength reinforcing concave-convex portion (27) having a drain hole (28) between them;

Washing shaft support member (3) for maintaining a gap between the bearing support 11 and the rotor frame (21);

It consists of a fastening member (4) for fastening and fastening the laundry shaft support member (3) to the rotor frame (21).

2 and 3, the washing shaft support member 3 is made of a resin material having a vibration mode different from that of the washing shaft 4, and a radius of the shaft support part 3a and the shaft support part 3a. It extends in the direction but consists of a fastening portion (3b) formed to have a wrinkle along the axial direction.

That is, the fastening portion 3b is formed to extend outward in the radial direction of the cylindrical shaft support portion 3a, and is bent to have an upward surface and a downward surface in the circumferential direction.

In this case, a serration 31 is formed at the shaft support part 3a, and the coupling part 3b is provided with a coupling protrusion 32 integrally protruding toward the rotor frame 21.

On the other hand, the rotor frame 21 is fastened so as to correspond to the coupling hole 22 and the through hole 300 of the laundry shaft support member 3 to correspond to the engaging projection 32 of the laundry shaft support member (3). A ball 23 is formed.

In addition, the laundry shaft support member 3 is formed in a substantially disk shape in plan view, but is not necessarily limited thereto.

Referring to the effects of the configuration as described above are as follows.

The laundry shaft support member 3 of the present invention is the fastening member 4 is a washing shaft support member 3 in a state in which the coupling protrusion 32 is fitted into the coupling hole 22 formed in the rotor frame 21. The laundry shaft support member is coupled to the rotor frame by allowing the through hole 300 to be fastened to the fastening hole 23 of the rotor frame.                     

The laundry shaft support member 3 of the present invention as described above has a structure in which the fastening portion is corrugated so that the consumption of the material is small but the rigidity is increased.

Meanwhile, as shown in FIG. 2, the washing shaft S is not in contact with the rotor frame 21 due to the washing shaft supporting member, which is an insulator, and no current flows in the washing shaft S even though current flows in the rotor frame 21. Will not.

That is, even if insulation is broken between the stator 1 coil part of the motor M and the rotor frame 21 of the rotor 2 so that current flows in the rotor frame 21, the insulating laundry shaft is made of resin. Since the member 3 is blocked from the electrical connection between the rotor frame 21 and the washing shaft, the current is not transferred to the washing shaft S, thereby preventing safety accidents.

In other words, in the present invention, by changing the shape of the washing shaft support member (3) to increase the rigidity and insulation performance as a whole, the input of the material can be reduced, even if a current flows in the rotor frame 21 washing shaft (S) This prevents the occurrence of safety accidents by blocking the transmission of current to protect the user.

In addition, in the related art, the vibration of the vibration generated from the motor M is reduced in the user's reliability by the user due to the noise generated due to the vibration transmitted to the washing shaft S, in the present invention. It is transmitted to the washing shaft (S) through (3), the transmitted vibration is attenuated by the washing shaft support member (3) made of a resin material having a vibration mode different from the rotor frame 21, which is made of steel, washing shaft By transmitting to (S), since the noise is effectively blocked, it is possible to improve the reliability of the product to the user.

In addition, the lower surface of the rotor frame 21 is formed with a plurality of vent holes 26 and the cooling fan 25, wherein the vent holes 26 are naturally bent when the cooling fan 25 is bent upward at a right angle The heat of the motor (M) is cooled by the cooling fan 25 and the ventilation hole 26, and has a superior cooling effect compared to the conventional cooling method depending only on the ventilation hole (26) It is possible to extend the performance and life of (M).

In addition, between the ventilation hole 26 and the cooling fan 25, a protrusion-strength convex portion 27 protrudingly formed is formed, and a drainage hole 28 is formed on the lower surface thereof, and is separated from the rotor frame 21. The wash water is collected in the strength reinforcing concave-convex portion 27 in which the drain hole 28 is formed and discharged into the drain hole 28.

At this time, the washing water dropped to the rotor frame 21 is discharged to the outside, to prevent the operation state of the motor (M) due to the washing water evaporated when the temperature of the motor (M) rises into the motor. Therefore, the washing performance of the washing machine can be maintained in an optimal state.

According to the present invention, the insulation is made by the washing shaft support member, thereby preventing current from being transferred to the washing shaft by the washing shaft support member even when insulation is broken between the stator coil part of the motor and the rotor frame of the rotor. To prevent safety accidents.

In addition, the present invention increases the rigidity of the laundry shaft support member while reducing the material by the crimp structure of the fastening portion of the laundry shaft support member.

On the other hand, the phenomenon that the vibration of the motor is transmitted to the washing shaft is reduced by the resin shaft support member made of a resin having a different vibration mode can reduce the generation of noise, a useful effect that can improve the reliability of the product to the user Has

Claims (6)

Insulation between the stator having a coil part, the rotor 2 having a metal rotor frame provided with a magnet, the metal washing shaft S, the metal laundry shaft S and the rotor, In the motor of the direct type washing machine having a washing shaft support member (3) to allow the rotational force of the rotor to be transmitted to the washing shaft of the metal material; The laundry shaft support member 3, The shaft support part 3a as a resin material different from the washing shaft S and the vibration mode; A motor of a direct type washer, characterized in that formed in the axial support portion (3a) extending in the radial direction, but is formed with a fastening portion (3b) to have a wrinkle along the axial direction. The method of claim 1, The motor of the direct type washer, characterized in that the serration (31) is formed on the shaft support (3a). The method of claim 1, The fastening unit (3b) of the direct type washing machine, characterized in that the coupling protrusion 32 is formed integrally protruding toward the rotor frame (21). The method of claim 2, The rotor frame 21, the motor of a direct type washing machine, characterized in that the coupling hole 22 is formed to correspond to the engaging projection 32 of the laundry shaft support member (3). The method of claim 2, The rotor frame 21, the motor of a direct type washing machine, characterized in that the fastening hole 23 is formed so as to correspond to the through hole 300 of the laundry shaft support member (3). The method of claim 1, The washing shaft support member (3) is a motor of a direct type washing machine, characterized in that the disk shape.

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