KR100650783B1 - Drum washing machine - Google Patents

Abstract

The present invention relates to a drum type washing machine, and in order to provide a drum washing machine which improves productivity by improving the supporter structure and the drive shaft support structure of the drum type washing machine, which not only operate more stably but also simplify the production processing process. A tub installed inside, a drum installed inside the tub, a shaft axially connected to the rear wall of the drum, a front bearing and a rear bearing supporting the front and rear portions of the shaft, and the front bearing and A bearing housing for supporting a rear bearing, an outer rotor type motor for driving the shaft, and a stator coupled to the rear wall portion of the tub and the rear wall portion to maintain the concentricity of the stator. In the drum type washing machine including a supporter, Of the tub Is formed with a support protrusion protruding into the rear side at a predetermined position on the wall, the supporter position corresponding to the support protrusions, provide a drum type washing machine, it characterized in that the support holding groove portion is formed to be projecting portion is inserted in close contact with each other.

Drum Washing Machine, Stator, Concentricity, Supporter (20)

Description

Drum-type washing machine {DRUM WASHING MACHINE}             

1 is a cross-sectional view of the structure of a conventional drum washing machine.

2 is a cross-sectional view of a drum washing machine according to an embodiment of the present invention.

3 is a perspective view of the supporter 20 according to an embodiment of the present invention.

4 is a right side view of the portion “A” of FIG. 2 seen from the right side.

5 is a cross-sectional view of a drum washing machine according to a second embodiment of the present invention.

* Explanation of symbols for main parts of drawings *

12: Tub 12a: support protrusion

12b: fixing groove 13: drum

14: shaft 15: front bearing

18: Stator 19: Rotor

20: supporter 20 20a: support groove

20b: fixing hole 20c: irregularities

22: coupling bolt 23: bearing housing

The present invention relates to a drum type washing machine, and in particular, to improve the support structure and the drive shaft support structure of the drum type washing machine, to provide a drum washing machine that not only operates more stably, but also improves the production efficiency.

In general, the drum washing method is a method of washing the laundry using the friction force of the rotating drum and the laundry by receiving the driving force of the motor in a state in which detergent, washing water and laundry are put in the drum, and there is almost no damage to the laundry. This is not tangled with each other, knocking and rubbing the washing effect is to give.

1 is a cross-sectional view of the structure of a conventional drum washing machine.

As shown in FIG. 1, in the conventional drum washing machine, a tub 2 is installed inside the cabinet 1, and a drum 3 is rotatably installed inside the tub 2.

A motor 5a is installed below the tub 2, and a motor pulley is axially connected to the motor 5a.

Meanwhile, a drum shaft is installed behind the drum 3, and a drum pulley 19 is installed on the drum shaft 4.

The drum pulley 19 installed on the drum shaft and the motor pulley 18 connected to the motor 5a are connected to the belt 20 which is a power transmission element.

A door 21 is installed in front of the cabinet 1, and a gasket 22 is installed between the door 21 and the tub (TUB).

Such a conventional washing machine transmits the driving force of the motor 5a to the drum via a belt, thereby causing not only energy loss but also noise.

In order to solve this problem, a direct drum washing machine such as Korean Patent Application No. 1999-45088 has been proposed.

However, the drum washing machine solves the problems of preventing power loss and generating noise, but the stepped portion is formed in the shaft shaft of the drum washing machine, making it difficult to form the shaft shaft, and it is difficult to maintain the concentricity of the stator stably. Have

In addition, the drum washing machine is configured to bend the end of the supporter to be in close contact with the rib formed on one side of the tub, and to maintain the concentricity of the stator by making the central part of the supporter to be in close contact with the outer peripheral surface of the bearing housing. In the manufacturing process of the drum washing machine, there arises a problem that a step of bending the supporter end is separately required in order to bring the end of the supporter into close contact with the rib of the tub.

Accordingly, the present invention has been invented to solve the above problems, an object of the present invention is to improve the support structure and the drive shaft support structure of the drum type washing machine, to operate more stably, and to simplify the production processing process To provide a drum washing machine for improving productivity.

The present invention for achieving the above object is a tub installed inside the cabinet, a drum installed inside the tub, a shaft axially connected to the rear wall portion of the drum, and support the front and rear portions of the shaft, respectively A front bearing and a rear bearing, a bearing housing for supporting the front bearing and the rear bearing, an outer rotor type motor for driving the shaft, and a stator and a rotor, coupled to the rear wall portion and the rear wall portion of the tub. A drum type washing machine comprising a supporter formed between stators to maintain concentricity of the stator, wherein a support protrusion protruding to the rear side is formed at a predetermined position of the rear wall surface of the tub, and the position of the supporter corresponding to the support protrusion is provided. The support protrusion is inserted into the support groove is characterized in that the formed .

Preferably, the outer surface of the shaft and the inner surface of the front bearing are formed on the same surface, the insertion groove is formed in the rear portion of the bearing housing, the bent portion formed in the insertion groove of the bearing housing at the rear end of the supporter Is formed.

In addition, a plurality of fixing holes having a diameter equal to or smaller than an outer diameter of the coupling bolt is formed at an outer side of the supporter, and a fixing groove is formed at the rear wall of the tub corresponding to the fixing hole, and the coupling bolt is fixed to the fixing hole and Be sure to force the fitting into the fixing groove.

The drum type washing machine of the present invention formed as described above has a support protrusion formed on the rear wall of the tub so as to be in close contact with the support groove formed in the supporter to not only allow the supporter and the tub rear wall to be more stably fixed, but also the joining process of the supporter. In addition, it can be more easily combined.

In addition, the process of machining the shaft to determine the position of the bearing by forming the outer surface of the shaft and the inner surface of the front bearing on the same surface and fixing the position of the bearing by using the step formed in the bearing housing will be omitted. Can be.

In addition, the bent portion formed at the rear end of the supporter is inserted so that the peripheral surface is in close contact with the insertion groove formed in the rear portion of the bearing housing, thereby making the relative position of the supporter and the bearing housing constant, resulting in concentricity of the stator fixed to the supporter. Keep it stable.

In addition, a plurality of fixing holes having a diameter equal to or smaller than an outer diameter of the coupling bolt is formed at the outer side of the supporter, and a fixing groove is formed at the rear wall portion of the tub corresponding to the fixing hole, so that the coupling bolt is fixed to the fixing hole and the fixing hole. By being in close contact with the inner surface of the groove, the relative position of the supporter and the tub is fixed to maintain the concentricity of the stator fixed to the supporter more stably.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In addition, this embodiment is not intended to limit the scope of the present invention, but is presented by way of example only.

Figure 2 is a cross-sectional view of a drum washing machine according to an embodiment of the present invention, Figure 3 is a perspective view of a supporter according to an embodiment of the present invention, Figure 4 is a right side view of the "A" part of Figure 2 seen from the right side.

As shown in FIG. 2, the present embodiment includes a tub 12 installed inside the cabinet, a drum 13 formed inside the tub, a shaft 14 axially coupled to the rear side of the drum, The front bearing 15 and the rear bearing 16 supporting the shaft, the bearing housing 23 supporting the front bearing and the rear bearing, the shaft 14 are driven, and the stator 18 and the rotor ( The outer rotor type motor 17 which consists of 19, and the supporter 20 which maintains the concentricity of the said stator 18 are comprised.

The supporter 20 is formed between the rear wall portion of the tub 12 and the stator 18 coupled to the rear wall portion, and is fixed to the tub 12 and the stator 18 by the fastening member 21.

A plurality of support protrusions 12a are formed along the periphery of the rear wall surface of the tub 12 at predetermined intervals.

The support protrusion 12a is formed to protrude rearward from the tub 12, and in the present embodiment, is formed in a fan shape having a lower portion cut in plan view.

The support protrusion 12a formed in the shape of a fan having a lower cut portion is formed at a right angle with respect to the force in the rotational direction and the radial direction, so that the contact surface with the support groove 20a to be described later is perpendicular to the force in the rotational direction and the radial direction. It produces more stable bearing capacity without slip.

A support groove 20a is formed in the supporter 20 coupled to the rear side of the tub 12 in response to the support protrusion 12a formed at the rear wall of the tub 12.

The support groove portion 20a is formed to have the same depth as the height of the protrusion of the support protrusion portion 12a so that the support protrusion portion 12a can be inserted, and is formed at a predetermined interval along the circumference of the supporter 20.

In addition, the support protrusion 12a is formed in the same overall shape as the support groove 20a, and when inserted, the support protrusion 12a is tightly fixed to the inner surface of the support groove.

Accordingly, when the support protrusion 12a is inserted into the support groove 20a, the relative position of the supporter 20 and the tub is fixed.

In addition, the support protrusions 12a and the support grooves 20a are formed by the operator simply inserting the support protrusions of the tub into the support grooves in the process of coupling the supporter 20 to the rear wall of the tub 12. Make it easy to find the exact assembly position of (20).

The support groove portion 20a of the supporter 20 is formed by forming a flat steel sheet and recessing it.

In addition, a plurality of fixing holes 20b are formed around the outside of the supporter 20.

A plurality of fixing holes 20b are formed along the circumference of the supporter 20 at predetermined intervals.

In addition, a plurality of fixing grooves 12b are formed at positions corresponding to the fixing holes 20b in the tub rear wall part.

That is, a plurality of fixing grooves 12b are formed along the outer circumference of the rear wall of the tub 12 at predetermined intervals.

The coupling bolt 22 is inserted into and coupled to the fixing hole 20b and the fixing groove 12b.

The fixing hole 20b is formed to be equal to or slightly smaller than the diameter of the coupling bolt 22 so that the coupling bolt 22 and the fixing hole 20b and the fixing groove 12b are in close contact with each other.

Accordingly, the relative position of the supporter 20 and the tub 12 is more stably maintained.

In addition, a screw thread is formed on the inner surface of the fixing hole 20b and the inner surface of the fixing groove 12b to facilitate insertion of the coupling bolt 22.

On the other hand, the shaft 14 formed to be axially connected to the central portion of the drum rear wall is supported by the front bearing 15 and the rear bearing 16.

The front bearing 15 and the rear bearing 16 are supported by a bearing housing 23.

As shown in Fig. 4, the rear outer circumferential surface of the bearing housing 23 is formed with a tooth-shaped uneven portion 23a.

In addition, the concave-convex 20c is formed to correspond to the concave-convex portion 23a of the bearing housing 23 as well as the inner side of the central portion of the supporter 20 formed to surround the bearing housing 23.

Accordingly, the inner surface of the supporter 20 and the outer surface of the bearing housing 23 are engaged to each other, so that the relative position of the supporter 20 and the bearing housing 23 is stably maintained, thereby supporting the supporter 20. The concentricity of the stator 18 mounted on the) remains more stable.

The front bearing 15 is supported so as not to be moved backward by the "a" shaped stepped jaw 23a formed in the bearing housing, and is also formed so as not to move forward by the jaw 14a formed in the shaft.

5 is a cross-sectional view of the drum washing machine according to the second embodiment of the present invention.

As shown in FIG. 5, a bent portion 50a bent forward is formed at the rear end of the supporter 50 of the second embodiment of the present invention.

The bent portion 50a is inserted into the insertion groove 53a formed in the rear portion of the bearing housing 53, and the bent portion 50a is formed to be in close contact with the inner surface of the insertion groove 53a.

In this way, as the bent portion 50a of the supporter 50 is inserted into and closely contacted with the insertion groove 53a, one end of the supporter 50 is supported by the bearing housing 23, and thus the supporter 50 is supported. And the relative position of the bearing housing 53 are kept constant.

Therefore, the concentricity of the stator fixed to the supporter 50 is kept more stable.

According to the present invention, the support protrusion formed on the rear wall portion of the tub is inserted in close contact with the support groove formed on the supporter, which not only makes the supporter and the tub rear wall portion more stably fixed, but also makes it easier for an operator to assemble the supporter on the rear wall of the tub. To help.

In addition, a plurality of fixing holes having a diameter equal to or smaller than an outer diameter of the coupling bolt is formed at the outer side of the supporter, and a fixing groove is formed at the rear wall portion of the tub corresponding to the fixing hole, so that the coupling bolt is fixed to the fixing hole and the fixing hole. By being in close contact with the inner surface of the groove, the relative position of the supporter and the tub is fixed to maintain the concentricity of the stator fixed to the supporter more stably.

That is, the present invention, in order to maintain the concentricity of the stator by bending the front end of the supporter in close contact with the rib inner wall surface of one side of the tub rear wall in the conventional drum washing machine, the rear end of the supporter is in close contact with the outer peripheral surface of the bearing housing By omitting the bending molding process of the cut portion of the supporter, which is required, the manufacturing process of the supporter is simplified to improve the production efficiency, and the tub rear wall part and the supporter are directly fastened around the outside of the supporter, and the support protrusion is And by using the support groove to maintain the relative position of the supporter and the tub more stable, the concentricity of the stator is maintained stably.

In addition, by forming the outer surface of the shaft and the inner surface of the front bearing on the same surface, the process of machining the shaft to determine the position of the bearing by determining the position of the bearing by using a step formed in the bearing housing to omit To solve the problem of shaft machining.

And, the bent portion formed at the rear end of the supporter is inserted so that the peripheral surface is in close contact with the insertion groove formed in the rear portion of the bearing housing, thereby making the relative position of the supporter and the bearing housing constant, resulting in concentricity of the stator fixed to the supporter. Keep it stable.

Claims (9)

A tub installed inside the cabinet, a drum installed inside the tub, a shaft axially connected to the rear wall of the drum, a front bearing and a rear bearing supporting the front and rear portions of the shaft, and the front bearing. And an outer rotor type motor configured to drive the shaft and a bearing housing for supporting the rear bearing, and an stator and a rotor, and a stator coupled to the rear wall portion of the tub and the rear wall portion to maintain concentricity of the stator. In the drum type washing machine comprising a supporter to A support protrusion protruding to the rear side is formed at a predetermined position of the rear wall surface of the tub, and a support groove portion is formed at the position of the supporter corresponding to the support protrusion to insert and support the support protrusion. Insertion grooves are formed in the rear of the bearing housing, the bent portion is inserted into the insertion groove of the bearing housing is formed at the rear end of the supporter, The outer peripheral portion of the rear end of the bearing housing is formed in a sawtooth shape, the drum type washing machine, characterized in that the concave-convex portion is formed in close contact with the toothed shape of the bearing housing on the inner side of the rear end of the supporter. delete The method of claim 1, A plurality of fixing holes having a diameter corresponding to the outer diameter of the coupling bolt is formed in the outer portion of the supporter, and a fixing groove is formed in the rear wall portion of the tub in correspondence to the fixing hole, and the supporter and the tub rear wall using a coupling bolt. Drum type washing machine characterized in that the position of the fixed portion. The method of claim 1, A plurality of fixing holes having a diameter smaller than the outer diameter of the coupling bolt is formed in the outer portion of the supporter, and a fixing groove is formed in the rear wall portion of the tub corresponding to the fixing hole so that the coupling bolt is held in the fixing hole and the fixing groove. Drum type washing machine characterized in that the fitting. The method according to claim 3 or 4, Drum type washing machine, characterized in that the screw thread corresponding to the coupling bolt is formed on the inner surface of the fixing groove. delete delete The method of claim 1, Drum-type washing machine characterized in that the outer surface of the shaft and the inner surface of the front bearing is formed on the same surface. delete

Images