KR101235743B1 - Motor with compensation for loss-in-weight and drum type washing machine having the same - Google Patents

Abstract

The present invention relates to a motor that compensates for weight reduction and a drum washing machine using the same, comprising: a stator fixed to a tub, and a rotor coupled to a drum so as to be rotatable from the stator. A ring-shaped weight compensating member for maintaining the balance of the tub by compensating for the weight which is reduced due to the change is fixed to the tub by the bolt with the stator. Accordingly, the present invention compensates for the weight loss of the motor caused by changing the structure or material of the motor, in particular, the coil, etc., to improve performance or reduce cost, so that the previous balance of the tub can be maintained as it is. By eliminating the balance correction of the tub due to the weight change, it has the effect of reducing the time and effort in calculating and changing the balance and eliminating the factor of cost increase.

Tub, Drum, Suspension Spring, Damper, Stator, Rotor, Weight Compensator

Description

MOTOR WITH COMPENSATION FOR LOSS-IN-WEIGHT AND DRUM TYPE WASHING MACHINE HAVING THE SAME}

1 is a side cross-sectional view showing a drum washing machine according to the prior art,

Figure 2 is an exploded perspective view showing the main part of the drum washing machine having a motor that is compensated for the weight reduction according to the present invention,

3 is a perspective view illustrating a weight compensating member of a drum washing machine motor in which weight loss is compensated according to the present invention;

Figure 4 is a perspective view showing a state in which the weight compensation member of the drum washing machine motor is compensated for the weight reduction according to the present invention,

Figure 5 is a perspective view showing another embodiment of the weight compensation member of the drum washing machine motor is compensated for the weight reduction according to the present invention.

Description of the Related Art

110: stator 111: stator core

111c: fastening portion 112: insulator

114: coil 115: mounting groove

120: rotor 130: weight compensation member

131: plate 131a: fastening hole

132: protrusion 133: divided piece

210: Tub 211: Fixing part

220: shaft

The present invention relates to a motor in which weight reduction is compensated and a drum washing machine using the same. The present invention relates to a motor and a drum washing machine using the same, in which a weight reduction is compensated for compensating for a reduction so as to maintain a previous balance of a tub.

In general, the drum washing machine is configured to rotate the cylindrical drum from the inside of the washing tank, while washing the laundry by dropping the laundry from the top to the bottom of the drum in this process, the damage caused by the twisting of the laundry after washing and the amount of washing water used Due to the advantages such as relatively small compared to the washing machine of the pulsator type, the demand is increasing, the peripheral technology is also rapidly developing.

Such a drum washing machine has an indirect connection method in which a driving force of a motor is indirectly transmitted to a drum through a pulley and a belt in a driving method, and a rotor of a motor such as a BLDC motor is directly connected to a drum, so that the driving force of the motor is directly connected to the drum. It is divided into direct connection methods.

Referring to the attached drum washing machine directly connected to the conventional motor as follows.

1 is a side cross-sectional view showing a drum washing machine according to the prior art. As illustrated, the drum washing machine 10 is connected to a conventional motor when the tub 12 is installed in the cabinet 11 to clean the laundry, and the drum 12 has a washing function to clean the laundry inside the tub 12. 13 is rotatably installed, and the motor 14 is installed in the tub 12 and the drum 13.

In the cabinet 11, an inlet 11a is formed in front of the laundry to enter and exit the drum 13, and the door 11b is installed in the inlet 11a so that the door 11b can be opened and closed. In addition to this, a controller (not shown) for controlling operation is installed, and a water supply hose 11d for supplying washing water to the tub 12 is installed. In addition, the cabinet 11 is provided with a drain pump 11e and a drain hose 11f to discharge the washing water supplied to the tub 12 to the outside.

The tub 12 is connected to the inner surface of the cabinet 11 by the suspension spring 15 so as to be supported by the cabinet 11, and is installed at the bottom of the cabinet 11 to attenuate vibration generated during the dehydration operation. The lower side is supported by the damper 16 which becomes.

The drum 13 is rotatably installed on the tub 12 via a bearing with a shaft 13a coupled to the rear side.

The motor 14 is a BLDC motor, which is installed to have a stator 14a fixed to the fixing part 12a provided on the rear side of the tub 12 and a drum fixed to the drum 13 so as to have a gap outside the stator 14a. Rotor 14b.

Stator 14a is a front and rear stator core consisting of a ring-shaped yoke (not shown) fixed to the fixing portion 12a of the tub 12 and teeth (not shown) arranged in a plurality along the outer circumferential surface of the yoke portion. A coil (not shown) is wound to insulate the teeth by a pair of insulators (not shown) fitted in the.

The rotor 14b is fixed to the shaft 13a of the drum 13 with a bolt or the like while maintaining a gap with the stator 14a on the outside of the stator 14a.

In the drum washing machine 10 according to the related art, the tub 12 is washed with the laundry by analyzing the balance of the tub 12 in which the optimal washing of the laundry is performed and vibration or noise is minimized. Despite the weight of the drum 13, it is supported and fixed by the suspension spring 15 and the damper 16 to maintain an optimum balance.

However, in the conventional drum washing machine 10, the weight of the motor 14 located on the rear side of the tub 12 also acts as an important factor in calculating the balance of the tub 12, in order to improve performance and reduce cost, When the structure or material of the 14 is changed, the weight of the motor 14 is changed. When the weight of the motor 14 is reduced due to such a change, the tub 12 is unbalanced and the drum inside the tub 12 is unbalanced. (13) not only causes a lot of vibration or noise during rotation, but also has a problem of making normal washing difficult.

In particular, due to the rise in raw material prices, there are many attempts to replace expensive copper (Cu) with low-cost aluminum (Al) instead of the same amount, in which case the aluminum coil has a lower weight than the copper coil. Due to the characteristics, the weight of the motor 14 itself is reduced, and as described above, the conventional tub 12 has a problem of making it difficult to drive the drum washing machine 10.

In order to solve such a problem, in order to calculate the balance of the tub 12 due to the change in the structure or material of the motor 14, it is necessary to go through a difficult and complicated work again, and newly apply the balance of the tub 12 by such work. In order to change the weight or structure of the tub 12, the support spring and the fixing position of the suspension spring 15 and the damper 16 is inevitable, which has a problem that increases the time and effort as well as the cost there was.

The present invention is to solve the above-mentioned conventional problems, the object of the present invention is to compensate for the weight loss of the motor caused by changing the structure or material of the motor, in particular the material of the coil, etc. in order to improve performance or cost reduction By maintaining the previous balance of the tub as it is, and by eliminating the balance correction of the tub due to the change in the weight of the motor, the weight reduction to reduce the time and effort in calculating and changing the balance, and to eliminate the factors of the cost increase To provide a motor and a drum washing machine using the same.

The present invention for achieving the above object, in the drum washing machine motor comprising a stator fixed to the tub and a rotor coupled to the drum so as to be rotatable from the stator, the weight is reduced due to the change in the structure or material of the motor The ring-shaped weight compensating member for maintaining the balance of the tub by compensating is fixed to the tub together with the stator by the bolt.

In addition, the present invention is installed in the tub so that the drum is rotatable, the rotor is fixed to the drum, and in the drum washing machine having a motor to which the stator is fixed to the tub, the weight that is reduced due to the change in the structure or material of the motor The ring-shaped weight compensating member for maintaining the balance of the tub by compensating is fixed to the tub together with the stator by the bolt.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

Figure 2 is an exploded perspective view showing the main portion of the drum washing machine having a motor that is compensated for weight reduction according to the present invention. As shown, the drum washing machine 200 having a motor that is compensated for the weight reduction according to the present invention is tub 210 for providing a space for washing the laundry inside the cabinet 11 (shown in Figure 1) forming the appearance Is installed, and a drum 13 (shown in FIG. 1) is rotatably installed to rotate the laundry inside the tub 210 so that washing by dropping is performed, and the tub 210 and the drum 13 (in FIG. 1) are rotated. Motor 100 is installed, but the ring-shaped weight compensation member 130 is fixed to the tub 210 together with the stator 110 by a bolt (B ₁ ).

The tub 210 is fixed and supported inside the cabinet 11 (shown in FIG. 1) by a suspension spring 15 (shown in FIG. 1) and by a damper 16 (shown in FIG. 1) on the upper side thereof. The balance is maintained to optimize the cleaning.

The drum 13 (shown in FIG. 1) is rotatably installed inside the tub 210 by coupling the shaft 220 fixed to the rear side via a bearing (not shown) to the tub 210.

On the other hand, the drum washing machine motor of the present invention is a motor (100) provided in the drum washing machine 200 of the present invention is a BLDC motor, for example, a stator (fixed to the fixing portion 211 provided on the rear side of the tub 210) 110, a rotor 120 fixed to the shaft 220 of the drum 13 (shown in FIG. 1) so as to be rotatably installed with the air gap in the stator 110, and the bolt B ₁ together with the stator 110. It includes a weight compensation member 130 is fixed to the fixing portion 211 to the tub (210).

The stator 110 includes a stator core 111, an insulator 112 surrounding both sides of the stator core 111, and a coil 114 wound around the stator core 111 by the insulator 112. .

Stator core 111 is arranged in a plurality at regular intervals along the outer circumferential surface is provided with teeth (111b) toward the outside, arranged in a plurality at regular intervals along the inner circumferential surface is provided with a fastening portion (111c) toward the center, The bolt B ₁ fastened to the portion 111c is coupled to the fixing portion 211 of the tub 210 so that the stator 110 is fixed to the tub 210.

Each of the insulators 112 has a shape that surrounds the front side and the rear side of the stator core 111, respectively, and is coupled to the front and rear sides of the stator core 111 so that the coil 114 is wound around the teeth 111b in an insulated state. do.

Any one of the insulators 112, preferably, a mounting groove 115 for mounting the ring-shaped weight compensation member 130 on one side of the insulator located at the rear side is formed along the circumferential direction for convenience of assembly. .

The weight compensation member 130 has a weight corresponding to the reduced weight to compensate for the weight that is reduced by changing the structure or material of the motor 100, in particular, by changing the coil from copper (Cu) to aluminum (Al). It is made of a metal material such as iron (Fe), or a metal alloy such as stainless steel, and is installed on the stator 110 so that the tub 210 maintains the existing balance without changing the design or structure.

As shown in FIG. 3, the weight compensation member 130 has a ring-shaped plate 131 corresponding to a yoke portion (not shown), which is a part of the ring in the stator 110, and enlarges and adjusts the compensated weight. At least one protrusion 132 is formed integrally with one side of the plate 131 to facilitate.

The plate 131 is formed with a plurality of fastening holes 131a for fastening with the bolt B1 along the circumferential direction, and the fastening holes 131a are fastening portions 111c of the stator 110 on the plate 131. Is formed at the corresponding position.

The protrusion 132 is arranged on the plate 131 to be inserted between the plurality of fastening portions 111c provided for fastening the bolts B ₁ with the tub 210 on the inner circumferential surface of the stator 110. The number of is determined so that the weight with the plate 131 corresponds to the reduced weight of the motor 100, preferably has a shape corresponding to the space provided between the fastening portion (111c).

On the other hand, as shown in Figure 5, the weight compensation member 130 of the present invention can be formed to be divided into a plurality of divided pieces 133 as another embodiment to be easily produced by dividing the size during production.

Split members 133, each of which is fixed to the tub 210 together with the stator 110 by by having at least at least one coupling hole (131a) to the vault ₍₁ B) locking bolts (B _1).

The rotor 120 is fastened to the center portion in order to be fixed to the shaft 220 of the drum 13 (shown in FIG. 1) with a bolt B ₂ or the like while maintaining the air gap with the stator 110 at the outside of the stator 110. A hole 121 is formed, and a plurality of permanent magnets (not shown) are installed along the inner circumferential surface of the stator 110 to face the teeth 111b of the stator 110.

The rotor 120 has teeth (not shown) for engaging with teeth (not shown) formed on the outer circumferential surface of the shaft 220 to be coupled to rotate with the shaft 220 of the drum 13 (shown in FIG. 1). It is formed on the inner peripheral surface of the fastening hole 121.

The operation of the motor and the drum washing machine using the same are compensated for the weight reduction is made as follows.

Improved performance or cost of the motor 100 by changing the number of teeth 111b of the stator 110, changing the shape of the stator 110 or the rotor 120, or replacing copper (Cu) coils with aluminum (Al) coils. When the structure or material of the motor is changed for saving, the protrusion 132 of the weight compensation member 130 having a weight corresponding to the reduced weight to compensate for the reduced weight of the motor 100 is stator 110. The tub 210 through the fastening hole 131a of the weight compensation member 130 and the fastening portion 111c of the stator 110 with a plurality of bolts B ₁ in a state of being inserted into the fastening portion 111c of the tub 210. As shown in FIG. 4, the weight compensating member 130 may be easily fixed to the tub 210 together with the stator 110 by fixing the fixing parts 211 to the fixing parts 211.

In addition, as shown in FIG. 5, the weight compensation member 130 is divided into a plurality of divided pieces 133 so as to solve an increase in cost or difficulty in working according to size.

As described above, the drum washing machine 200 according to the present invention is relatively inexpensive at a cost (Cu) because the structure or material of the motor 100 is changed, in particular, the coil 114 in order to improve performance or reduce cost of the motor 100. Optimum cleaning action for the laundry in the drum 13 (shown in FIG. 1) by allowing the tub 210 to compensate for the weight loss of the motor 100 by the weight compensating member 130 when changing to aluminum (Al). And to maintain the existing balance to minimize vibration and noise.

Therefore, even if the weight of the motor 100 according to the present invention is reduced due to the structure or material changes, it is possible not only to reduce the time or effort required for the work for the balance correction of the tub 210, but also to correct the balance of the tub 210. The suspension spring 15 (shown in FIG. 1) and the damper 16 (shown in FIG. 1) according to the position change or design change, and accordingly to prevent the rise of the cost of new manufacturing.

As described above, the motor which is compensated for the weight reduction according to the present invention and the drum washing machine using the same reduce the weight of the motor generated by changing the structure or material of the motor, in particular, the material of the coil, in order to improve performance or reduce cost. To keep the previous balance of the tub as it is, by eliminating the balance correction of the tub due to the change in the weight of the motor, reducing the time and effort in calculating and changing the balance, and eliminating the factor of cost increase. Have.

Claims (8)

In the drum washing machine motor comprising a stator fixed to the tub and a rotor coupled to the drum to be rotatable from the stator, A ring-shaped weight compensating member which maintains the balance of the tub by compensating the weight reduced due to the change of the structure or the material of the motor is fixed to the tub by the bolt with the stator. Drum washing machine motor, characterized in that the weight reduction is compensated. The method of claim 1, The stator is, Wherein the mounting groove for mounting the weight compensation member on one side of the insulator is formed along the circumferential direction Drum washing machine motor, characterized in that the weight reduction is compensated. 3. The method according to claim 1 or 2, The weight compensation member, Is formed with a plurality of projections inserted between the fastening portion protruding to the bolt with the tub in the inner peripheral surface of the stator Drum washing machine motor, characterized in that the weight reduction is compensated. 3. The method according to claim 1 or 2, The weight compensation member, Formed to be divided into a plurality of split pieces, each split piece having at least one fastening hole for fastening bolts Drum washing machine motor, characterized in that the weight reduction is compensated. In a drum washing machine having a motor installed inside the tub so as to be rotatable, the rotor is fixed to the drum and the stator is fixed to the tub. A ring-shaped weight compensating member which maintains the balance of the tub by compensating the weight reduced due to the change of the structure or the material of the motor is fixed to the tub by the bolt with the stator. A drum washing machine having a motor whose weight reduction is compensated for. 6. The method of claim 5, The stator is, Wherein the mounting groove for mounting the weight compensation member on one side of the insulator is formed along the circumferential direction A drum washing machine having a motor whose weight reduction is compensated for. The method according to claim 5 or 6, The weight compensation member, Is formed with a plurality of projections inserted between the fastening portion protruding to the bolt with the tub in the inner peripheral surface of the stator A drum washing machine having a motor whose weight reduction is compensated for. The method according to claim 5 or 6, The weight compensation member, Formed to be divided into a plurality of split pieces, each split piece having at least one fastening hole for fastening bolts A drum washing machine having a motor whose weight reduction is compensated for.

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