KR101128792B1 - 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 drive unit 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 destroyed, 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 stator having a coil portion, a rotor (2) having a rotor frame made of metal with a magnet, the washing shaft (S), so that the rotational force of the rotor can be transmitted to the washing shaft In a direct type motor for a washing machine having a washing shaft support member (3) to be; The laundry shaft support member 3 comprises a shaft support portion 3a having a serration therein as a metal material, and a fastening portion 3b extending radially from the shaft support portion 3a. An insulator (7) is insert-molded at the shaft-coupling portion of the shaft (S) with the laundry shaft support member (3) to insulate the laundry shaft (S) from the rotor (2). A drive structure of a direct type washing machine is provided.

Direct Type, Washing Machine, Motor, Insulation, Laundry Shaft, Insulator

Description

Drive part structure of direct type washing machine {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

5 is according to another embodiment of the present invention.

6 is a perspective view of the insulator of FIG.

<Code Description of Main Parts of Drawing>

M-Motor 1-Stator

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

7-insulator

The present invention relates to a direct type washing machine, and more particularly, to a structure of a washing shaft support member and a washing shaft that are coupled between a bearing support and a rotor frame to maintain a spacing and support a washing 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 a resin material, the thickness of each molding portion becomes excessively thick, which takes a lot of time for cooling after injection molding and causes a cooling speed difference in each part of the laundry shaft support member. There may be drawbacks that are difficult to achieve precise molding.

The present invention is to solve and solve the above problems, even if the insulation between the stator coil portion of the motor and the rotor rotor frame is broken to prevent the occurrence of a safety accident by blocking the flow of current through the washing shaft through the washing shaft In addition, the vibration of the motor can be effectively prevented from being transmitted to the washing shaft, and the driving part structure of the direct type washing machine equipped with the washing shaft supporting member which can improve the formability and durability while reducing the material is provided. There is this.

In order to achieve the above object, the present invention provides a stator having a coil part, a rotor having a rotor frame made of metal provided with a magnet, a washing shaft, and a rotational force of the rotor to be transmitted to the washing shaft. A direct type motor for a washing machine having a laundry shaft support member;

The laundry shaft support member is composed of a shaft support portion having a serration therein as a metal material and a fastening portion extending radially from the shaft support portion,

An insulator is integrally formed by insert molding at an axial coupling portion of the laundry shaft with the laundry shaft support member, so that a driving unit structure of the direct washing machine is provided so as to insulate the laundry shaft from the rotor. .

According to such a configuration, even if insulation is broken between the stator coil part of the motor and the rotor frame of the rotor, the electric current is blocked from being transferred to the washing shaft by the insulator 7 of the washing shaft coupled to the washing shaft support member. The accident can be prevented, the vibration of the motor is transmitted to the washing shaft to block the generation of noise, and the durability of the washing shaft support member can be improved, so that the user can improve the reliability of the product. To have.

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 driving 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 rear end portion to transfer the rotational force to the washing tank (I) A washing shaft S provided with a serration unit S1;

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

Meanwhile, 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 the washing tub O (see FIG. 1). A stator 1;

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 fixing the washing shaft support member (3) to the rotor frame (21).

The washing shaft support member 3 includes a shaft support portion 3a having a serration 31 therein as a metal material, and a fastening portion 3b extending radially from the shaft support portion 3a. Is done.

On the other hand, an insulator 7 made of an insulating material such as resin is formed at the shaft coupling portion of the laundry shaft S with the laundry shaft support member 3 to insulate the laundry shaft S from the rotor 2. ) Is formed to be integral with the washing shaft by the insert molding.

At this time, the insulator 7 is formed over a sufficient area along the longitudinal direction of the washing shaft (S) for the insulation at the axial coupling portion.

In addition, an insulating washer (W) for preventing contact between the bearing and the laundry shaft support member is interposed between the laundry shaft support member 3 and the bearing B installed behind the laundry shaft.

In addition, in the present invention, as the laundry shaft support member 3 is made of a metal material such as aluminum, the fastening portion 3b extends radially outward of the cylindrical shaft support portion 3a, but is upward in the circumferential direction. And it may be formed in a structure bent to have a downward surface repeatedly.

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 has a structure in which the fastening portion is corrugated to reduce the consumption of the material, and since it is a metal material, the rigidity of the laundry shaft support member of the conventional resin material is increased.

Meanwhile, as shown in FIG. 2, the washing shaft S is integrally formed with an insulator, which is an insulator, at a sufficient length at the shaft coupling portion with the washing shaft support member, and the washing shaft S is formed even when a current flows in the rotor frame 21. ), No current flows.

That is, even if insulation is broken between the coil part of the stator 1 of the motor M and the rotor frame 21 of the rotor 2 so that current flows in the rotor frame 21, The electrical connection between the laundry shaft support member 3 and the laundry shaft S is cut off because the insulator made of insulating material is integrally formed at the shaft coupling portion of the laundry shaft support member 3 to be fastened. It will not be delivered to the laundry shaft (S) will be able to prevent accidents in advance.

In short, the present invention by forming an insulator on the washing shaft, to ensure insulation without regard to the material of the washing shaft support member, and to change the material and shape of the washing shaft support member 3 without a lot of material It is to increase the rigidity.

In addition, in the related art, the vibration caused by the noise generated by the vibration transmitted to the washing shaft S is reduced to the user, but in the present invention, the vibration generated from the motor M is the washing shaft S. The vibration transmitted to the laundry shaft is attenuated while passing through the insert molded insulator on the laundry shaft, so that vibration and noise are effectively blocked.

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 concave-convex portion 27 protrudingly formed is formed, and a drain hole 28 is formed in the concave-convex portion of the rotor frame 21. The washed 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.

On the other hand, the present invention is not limited to the above embodiments, and various modifications and changes can be made without departing from the technical spirit of the present invention.

That is, the insulator 7 may be integrated with the washing shaft by insert molding as in the above embodiment, but various other forms are possible.

For example, referring to FIGS. 5 and 6, the insulator 7 is a tube shape in which a serration S1 is formed on an outer circumferential surface, and may be made of a separate piece and pressed into the shaft coupling portion of the washing shaft S.

At this time, it is a matter of course that the serration S2 is formed on the inner circumferential surface so that the tube-shaped insulator inserted into the washing shaft S outer circumferential surface does not rotate.

In another embodiment, the laundry shaft support member 3 is a shaft support portion 3a having a serration therein as a metal material, and a fastening portion 3b extending radially from the shaft support portion 3a. The washing shaft (S) is formed integrally on the core and the outer peripheral surface of the metal material and the insulator (7) of the insulating material is provided with a serration (S1) in the shaft coupling portion with the washing shaft support member It may be configured to insulate between the laundry shaft (S) and the rotor (2).

That is, in this case, since the insulator 7 is formed on the outer circumferential surface over the entire length of the washing shaft, the insulation washer W can be removed unlike in the above-described embodiment.

On the other hand, in this case, the insulator may also be insert molded, as described above may also be manufactured in the form of a tube inserted into the outer peripheral surface of the metal washing shaft core.

According to the present invention as described above, the insulation between the rotor frame and the washing shaft is made by an insulator formed on the washing shaft, so that current is transmitted to the washing shaft even when the insulation is broken between the stator coil part of the motor and the rotor frame of the rotor. It is possible to prevent safety accidents by blocking them.

In addition, the present invention is to increase the rigidity of the washing shaft support member while reducing the material by using the washing shaft support member as a metal material and the fastening portion to the corrugated structure.

On the other hand, the vibration of the rotor frame is reduced by the insulator made of a material different from the vibration mode of the washing shaft can reduce the generation of vibration and noise, it has a useful effect to improve the reliability of the product to the user.

Claims (11)

A stator 1 having a coil part, a rotor 2 having a rotor frame made of metal provided with a magnet, a washing shaft S, and a washing shaft for transmitting rotational force of the rotor to the washing shaft. In a direct type motor for a washing machine having a support member (3); The laundry shaft support member 3, A shaft support portion 3a having a serration therein as a metallic material, It consists of a fastening portion (3b) extending in the radial direction from the shaft support (3a), The insulator 7 is insert-molded and integrally formed at the shaft coupling portion of the washing shaft S with the washing shaft supporting member 3 to insulate between the washing shaft S and the rotor 2. Drive unit structure of a direct type washing machine characterized in that it is built. The method of claim 1, The fastening portion 3b, Drive member structure of a direct type washing machine, characterized in that formed in the axial support portion (3a) extends in the radial direction but is formed with a fastening portion (3b) to have a corrugation in the axial direction. The method of claim 1, The fastening part (3b) of the drive unit structure 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 drive structure of the 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 drive unit structure of the direct-type washing machine, characterized in that the fastening hole 23 is formed to correspond to the through hole 300 of the washing shaft support member (3). The method of claim 1, The washing shaft support member (3) drive unit structure of a direct type washing machine, characterized in that the disk shape. The method of claim 1, Drive structure of a direct type washing machine, characterized in that the insulating washer (W) is interposed between the laundry shaft support member (3) and the bearing installed behind the laundry shaft. A stator 1 having a coil part, a rotor 2 having a rotor frame made of metal provided with a magnet, a washing shaft S, and a washing shaft for transmitting rotational force of the rotor to the washing shaft. In a direct type motor for a washing machine having a support member (3); The laundry shaft support member 3, A shaft support portion 3a having a serration therein as a metallic material, It consists of a fastening portion (3b) extending in the radial direction from the shaft support (3a), An insulator 7 made of a separate piece is installed on an outer circumferential surface of the washing shaft S with the washing shaft supporting member 3 of the washing shaft S to insulate the washing shaft S from the rotor 2. Drive unit structure of a direct type washing machine characterized in that it is built. The method of claim 8, The insulator 7 is, Serration (S1) formed on the outer circumferential surface of the tubular drive structure of the direct type washing machine, characterized in that inserted into the shaft coupling portion with the washing shaft support member of the washing shaft. The method of claim 9, The drive unit structure of a direct type washing machine, characterized in that the serration (S2) is formed on the inner circumferential surface so that the tube-shaped insulator inserted on the outer circumferential surface of the washing shaft does not rotate. A rotor 2 having a stator having a coil part, a rotor frame made of metal provided with magnets, a washing shaft S, and a washing shaft supporting member for transmitting rotational force of the rotor to the washing shaft ( In a direct type motor for a washing machine provided with 3); The laundry shaft support member 3, A shaft support portion 3a having a serration therein as a metallic material, It consists of a fastening portion (3b) extending in the radial direction from the shaft support (3a), The washing shaft (S) is formed integrally on the core and the outer peripheral surface of the metal material and consists of an insulating insulator (7) provided with a serration (S1) in the shaft coupling portion with the washing shaft support member, Drive unit structure of the direct-type washing machine, characterized in that the insulation between the shaft (S) and the rotor (2) is made.

Images