KR101079092B1 - Motor for direct driving type washing machine - Google Patents

Abstract

The present invention relates to a motor of a direct type washing machine, and in particular, even if the insulation between the stator coil of the motor and the rotor rotor frame is broken so that current does not flow to the washing shaft. Safety accidents are prevented from occurring, and the vibration of the motor is reduced and transmitted to the washing shaft.

To this end, the present invention provides a stator having a coil part, a rotor having a rotor frame made of metal with magnets, a metal washing shaft, and insulating the metal washing shaft and the rotor, In a direct type motor for a washing machine having a washing shaft support member for transmitting a rotational force to the washing shaft of the metal material; The laundry shaft support member,

A serration part is formed to which the washing shaft is fitted and coupled, and a washing shaft support part made of a metal having a fastening hole for fastening with the rotor frame at a radially outer side of the serration part;

Insulation provided between the rotor frame and the laundry shaft support part and as a separate piece from the laundry shaft support part for insulation between the fastening member fastened to the rotor frame through the fastening hole of the laundry shaft support part and the laundry shaft support part. There is provided a motor structure of a direct type washing machine characterized in that it comprises a gasket.

Direct type, washing machine, motor, insulation, laundry shaft

Description

MOTOR FOR DIRECT DRIVING TYPE WASHING MACHINE}

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

2 is a structural diagram of a driving unit of a direct drum washing machine according to a first embodiment of the present invention;

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

FIG. 4 is a corresponding view of FIG. 3 and illustrates an enlarged view of main parts according to a second exemplary embodiment of the present invention. FIG.

5 is a corresponding view of FIG. 3 and is an enlarged view of main parts according to a third exemplary embodiment of the present invention;

<Code Description of Main Parts of Drawing>

M-Motor

1-stator 11-bearing support

2-rotor 22-coupling hole

23-Fastener 3-Washing shaft support member

3a-Gasket 3b-Laundry Shaft Support

30b-boss 32-engaging projection

33-Through Hole 34-Assembly Groove

35-Assembly protrusion 4-Fastener

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 is broken in the rotor frame 21, 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 because it is made of a resin material only.

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 much time for cooling after injection molding and causes the cooling speed difference in each part to cause the laundry shaft support member. It may be a disadvantage that the exact molding of the difficult to be made.

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 It is an object of the present invention to implement a motor structure of a direct type washing machine having a washing shaft support member that can effectively prevent the vibration of the motor from being transmitted to the washing shaft and improve the durability of the washing shaft support member.

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 serration part is formed to which the washing shaft is fitted and coupled, and a washing shaft support part made of a metal having a fastening hole for fastening with the rotor frame at a radially outer side of the serration part;

Insulation provided between the rotor frame and the laundry shaft support part and as a separate piece from the laundry shaft support part for insulation between the fastening member fastened to the rotor frame and the laundry shaft support part through the fastening hole of the laundry shaft support part. There is provided a motor structure of a direct type washing machine characterized in that it comprises a gasket.

On the other hand, according to another aspect of the present invention for achieving the above object,

A stator having a coil portion, a rotor having a rotor frame made of metal provided with a magnet, and a metal washing shaft and the metal washing shaft and the rotor, and the rotational force of the rotor washes the metal. In the direct-type motor for a washing machine having a washing shaft support member to be transmitted to the shaft;

The laundry shaft support member,

The serration part is formed is coupled to the washing shaft is coupled, the outer side of the serration portion washing shaft support portion of a metal material having a fastening hole for fastening with the rotor frame,

Separate from the laundry shaft support part for insulation between the rotor frame and the laundry shaft support part and for insulation between the fastening member fastened to the rotor frame and the rotor frame through the fastening hole of the laundry shaft support part and the fastening hole of the rotor frame. There is provided a motor structure of a direct type washing machine characterized by including an insulating gasket provided as a piece.

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 prevent the noise is generated, it 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 driving unit of the drum washing machine according to the first 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 for transmitting the rotational force to the washing tank (I) A washing shaft S on which the serration section S1 is formed;

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 fastener (4) for fastening and fastening the laundry shaft support member (3) to the rotor frame (21).                     

As shown in Figure 3, the washing shaft support member 3,

The washing shaft (S) is inserted into the serration portion 31 is formed is coupled, the outer side of the serration portion 31 of the metallic material provided with a fastening portion for fastening with the rotor frame 21 Shaft support portion 3b,

It is provided as a separate piece from the laundry shaft support part 3b for insulation between the rotor frame and the laundry shaft support part and for insulation between the fastening member for fastening the laundry shaft support member to the rotor frame and the laundry shaft support part 3b. The insulating gasket 3a is comprised.

At this time, the insulating projection gasket (3a) and the coupling protrusion (32) protruding integrally toward the rotor frame (21), and the assembly protrusion protruding to conform to the assembly groove (34) of the washing shaft support (3b) ( 35).

The insulating gasket 3a includes a boss portion 30b that penetrates the through hole 330b formed in the laundry shaft support portion 3b to insulate the fastening member 4 from the laundry shaft support portion 3b.

On the other hand, the rotor frame 21, the coupling hole 22 is formed to correspond to the engaging projection 32 of the laundry shaft support member (3).

The rotor frame 21 is provided with a fastening hole 23 to correspond to the through hole 33 of the laundry shaft support member 3. The fastening hole 23 is formed by the boss formed in the protrusion during the press molding of the rotor frame, the thread is formed on the inner peripheral surface.

In addition, an insulating washer W is interposed between the head of the fastening member 4 and the inlet peripheral surface of the through hole 33 of the laundry shaft support member 3. This insulating washer W can be omitted, of course, when the area of the boss portion 30b is sufficient.

The serration portion 31 is formed on the inner side of the hollow cylindrical column.

In addition, the washing shaft support 3b or the insulating gasket 3a may have a substantially disc shape, but is not limited thereto.

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

When assembling the laundry shaft support member 3 to the rotor frame, first, the coupling protrusion 32 of the insulating gasket is inserted into the coupling hole 22 formed in the hub portion of the rotor frame to insert the insulating gasket 3a into the rotor frame 21. Close contact with the inner surface.

Subsequently, the washing shaft support part 3b is assembled to the insulating gasket 3a.

At this time, the assembling protrusion 35 of the gasket 3a is fitted into the assembling groove 34 of the washing shaft support portion 3b, and the boss portion 30b of the gasket 3a is fastened to the washing shaft support portion 3b. Assembly is performed so as to be located inside the through hole 330b.

In this state, if the fastener 4 is fastened to the fastening hole 23 through the through hole 33 of the boss 30b, the washing shaft support member 3 is firmly coupled to the rotor frame 21. .

In this case, as shown in FIG. 2, the washing shaft S does not come into contact with the rotor frame 21, but even if a current flows in the rotor frame 21 due to the gasket 3a made of an insulator, the washing shaft S is not in contact with the rotor frame 21. No current flows through it.

That is, in the present invention, the laundry shaft support member 3 is separated into individual pieces as a metal material and a resin material, thereby reinforcing the overall strength and imparting insulation performance, so that even if a current flows in the rotor frame 21, the laundry shaft ( By blocking the transmission of current to S) to prevent the occurrence of a safety accident and to protect the user.

In more detail, when the insulation is broken in the stator 1 coil portion of the motor M and the rotor frame 21 of the rotor 2 so that current flows in the rotor frame 21, the washing shaft is supported. Although the coupling portion of the member 3 with the washing shaft is made of metal, it is likely that current flows to the washing shaft S, but an insulating gasket 3a is positioned between the rotor frame and the washing shaft support portion, and the fastening member 4 and the washing shaft support portion are disposed. Since the insulating washer W and the boss portion 30b of the insulating gasket are interposed between (3b), the breakdown phenomenon between the rotor frame and the washing shaft does not occur since the rotor frame and the washing shaft are electrically insulated. Electrical safety accidents can be prevented beforehand.

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. As it is transmitted to the washing shaft through (3), the transmitted vibration is attenuated by the insulating gasket 3a having a vibration mode different from that of the rotor frame and transferred to the washing shaft S, thereby effectively blocking noise generation. Therefore, 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 Is formed in the cooling fan 25 and the ventilation holes 26 by the heat of the motor (M), by cooling only has a superior cooling effect compared to the conventional cooling method depending only on the ventilation holes 26 It is possible to extend the performance and life of (M).

In addition, a plurality of locations between the ventilation hole 26 and the cooling fan 25 are provided with a strength reinforcing concave-convex portion 27 protruding downward, and a drain hole 28 is formed on the lower surface of the rotor frame. The wash water dropped to 21 is collected in the strength reinforcing concave-convex portion 27 and discharged to 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, Figure 4 is a corresponding view of Figure 3, an enlarged view of the main portion according to the second embodiment of the present invention, the present embodiment is a rotor (2) having a stator having a coil portion, and a rotor frame made of metal provided with a magnet ) And a laundry shaft support member for insulating the metal laundry shaft S, the metal laundry shaft S, and the rotor, and transmitting the rotational force of the rotor to the metal laundry shaft. A direct type motor for a washing machine provided with (3);

The laundry shaft support member 3,

The serration part 31 to which the washing shaft is fitted and coupled is formed, and a washing shaft support part made of metal having a fastening hole for fastening with the rotor frame 21 on the radially outer side of the serration part 31 ( 3b),

Insulation between the rotor frame and the laundry shaft support part 3b and between the fastening member 33 and the rotor frame fastened to the rotor frame by passing through the fastening hole 33 of the laundry shaft support part 3b and the fastening hole 210 of the rotor frame. It is to include an insulating gasket (3a) provided as a separate piece from the laundry shaft support (3b) for the insulation of.

At this time, the insulating gasket (3a) is a boss (B) that is inserted into the fastening hole 210 of the rotor frame and the boss to block the contact between the nut (N) and the rotor frame 21 is fastened therein so that the insulation is made The part 33a is provided.

On the other hand, the positioning boss 200 is formed on the other side of the rotor frame 21, and the protrusion 310 having the positioning boss receiving groove 300a is formed in the gasket 3a, and the laundry paper The branch portion 3b is provided with a protrusion accommodating groove 300b in which the protrusion 310 of the gasket 3a is accommodated.

5 is an enlarged view of the main part according to the third embodiment of the present invention, in which case the fastening hole 23 formed in the rotor frame 21 is in the opposite direction as in the first embodiment. And a positioning means is provided as in the second embodiment.

That is, the present embodiment shows a case in which the formation direction of the fastening hole 23 is opposite.

Since the operation and effect according to the second and third embodiments are almost the same as in the above-described first embodiment, the description thereof is omitted.

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 scope of the technical spirit of the present invention.

According to the present invention, while the rigidity of the washing shaft support member is made to be insulated by the gasket, the current is washed by the washing shaft support member even if the insulation is destroyed in the stator coil part of the motor and the rotor frame of the rotor. It prevents the safety accident by blocking the transmission to the shaft.

In addition, the present invention is a phenomenon that the vibration of the motor is transmitted to the washing shaft is reduced by the resin material gasket 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 (13)

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 a direct type motor for a 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 washing shaft (S) is inserted into the serration portion 31 is formed is coupled, the outer side of the serration portion 31 of the metallic material provided with a fastening portion for fastening with the rotor frame 21 Shaft support portion 3b, It is provided as a separate piece from the laundry shaft support part 3b for insulation between the rotor frame and the laundry shaft support part and for insulation between the fastening member for fastening the laundry shaft support member to the rotor frame and the laundry shaft support part 3b. Motor of a direct type washing machine, characterized in that it comprises an insulating gasket (3a). The method of claim 1, The insulating gasket (3a) is a motor of a direct type washing machine, characterized in that it further comprises a coupling protrusion (32) protruding integrally toward the rotor frame (21). The method of claim 1, The insulation gasket (3a) is a motor of a direct type washing machine, characterized in that it further comprises an assembly protrusion (35) protruding to conform to the assembly groove (34) of the laundry shaft support (3b). The method of claim 1, The insulating gasket 3a includes a boss portion 30b which penetrates the through hole 330b formed in the laundry shaft support 3b to insulate the fastening member from the laundry shaft support 3b. Motor of the washing machine. 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 to correspond to the through hole (33) formed by the boss portion (30b) of the insulating gasket (3a). The method of claim 1, A motor of a direct type washing machine, characterized in that an insulating washer (W) is interposed between the head of the fastening member (4) and the washing shaft support member. The method of claim 1, The serration part 31 is a motor of a direct type washing machine, characterized in that formed on the inner surface of the hollow cylindrical column. The method of claim 1, The washing shaft support portion (3b) or insulating gasket (3a) of the direct type washing machine, characterized in that the disk form. 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 a direct type motor for a 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 serration part 31 to which the washing shaft is fitted and coupled is formed, and a washing shaft support part made of metal having a fastening hole for fastening with the rotor frame 21 on the radially outer side of the serration part 31 ( 3b), The laundry is insulated between the rotor frame and the washing shaft support part 3b and the insulation between the fastening member of the washing shaft support part 3b and the fastening hole of the rotor frame to be fastened to the rotor frame and the rotor frame. A motor of a direct type washer, characterized in that it comprises an insulating gasket (3a) provided as a separate piece from the shaft support (3b). 11. The method of claim 10, The gasket (3a) is a direct connection washing machine characterized in that the boss portion (33a) is inserted into the fastening hole 210 of the rotor frame to block the contact between the bolt and the rotor frame constituting the fastening member to be insulated Motor. 11. The method of claim 10, A positioning boss 200 is formed in the rotor frame, a protrusion 310 having the positioning boss receiving groove 300a is formed in the gasket 3a, and a gasket is formed in the laundry shaft support part 3b. Motor of a direct type washing machine, characterized in that the projection receiving groove (300b) for receiving the projection of the (3a) is provided. 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 a direct type motor for a 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 washing shaft (S) is inserted into the serration portion 31 is formed is coupled, the outer side of the serration portion 31 of the metallic material provided with a fastening portion for fastening with the rotor frame 21 Shaft support portion 3b, A separate piece from the laundry shaft support part 3b for insulation between the rotor frame and the laundry shaft support part 3b and for insulation between the fastening member for fastening the laundry shaft support member to the rotor frame and the laundry shaft support part 3b. An insulating gasket 3a provided as It is made of an insulating washer (W) interposed between the head of the fastening member and the washing shaft support member, The insulating gasket 3a includes a boss portion 30b which penetrates through the through hole 300b formed in the washing shaft support portion 3b and insulates the fastening member from the washing shaft support portion 3b. Motor of the washing machine.

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