KR200142943Y1 - Outer rotor motor for a washer - Google Patents

Abstract

Disclosed are an outer rotor motor of a washing machine and a washing machine employing the same. The disclosed outer rotor motor includes: an upper stator having a first salient pole wound around a first coil; A lower stator coupled to the upper stator and having a second salient pole wound around a second coil; An upper rotor having a magnet facing the first salient pole, and having a tubular first shaft disposed in the center thereof, the upper rotor being rotated with respect to the upper salient pole; And a lower rotor that faces the second salient pole and is provided with a second shaft penetrating the upper and lower stators and the first shaft. A washing machine employing such an outer rotor motor includes: an upper stator having an upper protrusion pole on which a first coil is wound; A lower stator coupled to the upper stator and having a lower salient pole wound around the second coil; An upper rotor having a magnet facing the upper salient pole and having a tubular first shaft at its center, the upper rotor being rotated with respect to the upper salient pole; A lower rotor having a magnet facing the lower salient pole and having a second shaft penetrating the upper and lower stators and the first shaft, the lower rotor being rotated with respect to the lower salient pole; A dehydration tank coupled to any one of the first shaft and the second shaft; It includes; a rotary blade coupled to any one of the first shaft and the second shaft. By employing the outer rotor motor and the washing machine employing the same structure as described above it is possible to maximize the washing efficiency and dewatering efficiency.

Description

Outer rotor motor for washing machine and fully automatic washing machine employing same

The present invention relates to an outer rotor motor for a washing machine and a washing machine adopting the same, and more particularly, to an improved outer rotor motor for a washing machine and a washing machine using the same, employing two rotor structures to improve washing and dewatering efficiency. will be.

1 is a schematic cross-sectional view of an outer rotor motor for a conventional washing machine, in particular, a tank type washing machine. Referring to the drawings, the outer rotor motor includes a stator 30 fixed to the frame 10 and a rotor 50 rotating relative to the stator 30.

The upper pole of the stator 30 is formed with a salient pole (30a) wound around the coil 35, the bearing 32 is provided in the center. The rotor 50 is installed on the shaft 60 rotatably supported by the bearing 32, the rotor member 70 coupled to the shaft 60, and a lower portion of the rotor member 70. It includes a magnet (80) provided to be spaced apart from the salient pole (30a) by a predetermined interval. The shaft 60 is combined with a washing tank and dehydration tank not shown.

In the outer rotor motor for a washing machine having such a structure, when a current is applied to the coil 35, a magnetic field is formed in the salient pole 30a, and the magnetic field interacts with the magnetic field of the magnet 80 to form the rotor 50. Rotate with respect to the stator 30. Therefore, as the rotor rotates, the washing tub and the dehydration tank combined with the shaft 60 are rotated together to perform the washing mode and the dehydration mode of the washing machine.

However, since the washing tank and the dewatering tank are rotated in the washing mode or the dewatering mode by the motor having one rotor structure, it is difficult to expect sufficient motor efficiency in each of the other modes. That is, in the washing mode, the outer rotor motor needs to be rotated at a low speed with a large torque, and in the dehydration mode, it is necessary to rotate at a high speed, but it is not easy to expect the maximum efficiency at the same time in the above two modes. In addition, when switching from the low speed mode to the high speed mode or the high speed mode to the low speed mode, an excessive load is applied to the motor, thereby reducing the motor life.

The present invention was created in order to solve the above problems, and an object of the present invention is to provide an outer rotor motor for a washing machine and a washing machine employing the same, which can expect the maximum washing and dewatering efficiency in a washing mode or a dehydrating mode.

1 is a schematic cross-sectional view of an outer rotor motor for a conventional washing machine.

Figure 2 is a schematic cross-sectional view of the outer rotor motor for a washing machine according to the present invention.

3 is a schematic cross-sectional view of the washing machine employing the outer rotor motor shown in FIG.

Explanation of symbols for main parts of the drawings

100 ... frame 125 ... upper stator

126 ... lower stator 125a ... first salient pole

126a ... Second salient pole 126 ... Lower stator

130 ... Stator 132 ... First Bearing

133 ... 2nd Bearing 135 ... 1st Coil

136 ... 2nd coil 175a ... 1st shaft

176a ... 2nd shaft 185,186 ... magnet

273 ... dehydration tank 276 ... rotorcraft

300 ... washing tub

In order to achieve the above object, the outer rotor motor according to the present invention, the upper stator having a first coil wound around the first coil; A lower stator coupled to the upper stator and having a second salient pole wound around a second coil; An upper rotor having a magnet facing the first salient pole, and having a tubular first shaft disposed at the center thereof to rotate with respect to the upper salient pole; And a lower rotor provided with a magnet facing the second salient pole, and having a second shaft penetrating the upper and lower stators and the first shaft to be rotated with respect to the lower salient pole.

In the present invention, the upper stator and the lower stator are preferably formed integrally.

In order to achieve the above object, a washing machine employing an outer rotor motor according to the present invention includes: an upper stator having an upper salient pole wound around a first coil; A lower stator coupled to the upper stator and having a lower salient pole wound around a second coil; An upper rotor having a magnet facing the upper salient pole and having a tubular first shaft at its center, the upper rotor being rotated with respect to the upper salient pole; A lower rotor having a magnet facing the lower salient pole and having a second shaft penetrating the upper and lower stators and the first shaft, the lower rotor being rotated with respect to the lower salient pole; A dehydration tank coupled to any one of the first shaft and the second shaft; It includes; a rotary blade coupled to any one of the first shaft and the second shaft.

Hereinafter, an outer rotor motor for a washing machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic cross-sectional view of the outer rotor motor for a washing machine according to the present invention. Referring to the drawings, the outer rotor motor for a washing machine includes a stator 130 fixed to the frame 100 and a rotor 170 rotated with respect to the stator 130.

The stator 130 includes an upper stator 125 and a lower stator 126. Here, the first salient pole 125a in which the first coil 135 is wound is provided on the upper part of the upper stator 125, and the second salient pole in which the second coil 136 is wound in the lower part of the lower stator 126. 126a) is provided. At this time, the hollow portion is formed in the center of the stator 130, the first bearing 132 is installed there.

The rotor 170 is composed of an upper rotor 175 and a lower rotor 176. A magnet 185 spaced a predetermined distance from the upper rotor 175 to face the first protrusion 125a is installed, and a tubular first shaft 175a is formed at the center of the upper rotor 175. The upper part of the lower rotor 176 is provided with a magnet 186 facing the second salient pole 126a and spaced a predetermined distance apart, and a second shaft 176a is installed at the center of the lower rotor 176. . The second shaft 176a is rotatable with respect to the first shaft 175a by passing through the first bearing 132 and the first shaft 175a. At this time, a second bearing 133 is installed between the first shaft 175a and the second shaft 176a so that the second shaft 176a can rotate smoothly. Here, the upper rotor (B) by varying the magnetic field strength of the magnets 185 and 186 installed in the upper and lower rotors 175 and 176 or the number of turns of the coil wound around the poles 125a and 126a. The rotational speeds and the torques of the 175 and the lower rotors 175 and 176 may be changed to obtain predetermined rotational characteristics. Although the upper stator 125 and the lower stator 126 have a structure in which the upper stator 125 and the lower stator 126 are coupled to each other, the same effect as described above may be obtained even when the protrusions are provided at the upper and lower portions of one stator.

Looking at the operation of the outer rotor motor of such a structure, by applying an alternating current to the first coil 135, the second coil 136 of the first and second stator (125, 126). Each magnetic field is formed in the protrusion 125a and the second protrusion 126a. This magnetic field interacts with the magnetic fields of the first and second magnets 185 and 186 to rotate the upper and lower rotors 175 and 176 independently. Accordingly, the first shaft 175a and the second shaft 176a may be independently rotated. In this case, since the second shaft 176a is rotated with the second bearing 133 interposed in the first shaft 175a, the first shaft 175a and the second shaft 176 interfere with each other. Do not receive.

Next, a washing machine employing an outer rotor motor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a schematic cross-sectional view of the washing machine employing the outer rotor motor shown in FIG. Referring to the drawings, the washing machine is installed in the washing tank 300, the inside of the washing tank 300 is rotatably installed in the dehydration tank (273) rotated in the dehydration mode, rotatably installed in the center of the washing tank (300) Rotating blade 276 is rotated in the washing mode. The outer rotor motor of the above structure is fixed to the lower portion of the washing tub 300, the dehydrating tank 273 is coupled to the first shaft 175a of the outer rotor motor, and the rotor blade 276 is It is coupled with the second shaft 176a. At this time, the rotation characteristics of the upper and lower rotors 175 and 176 can be manufactured to best correspond to the size, shape and weight of the dehydration tank 273 and the rotor blade 276, so that the washing mode and the In the dehydration mode, the washing and dewatering efficiency can be maximized.

As described above, the outer rotor motor for a washing machine according to the present invention is provided with a first shaft and a second shaft driven independently on a coaxial axis, and thus may have different rotational characteristics. In consideration of the size, shape and weight of the dehydration tank and the rotor blade in the adopted washing machine, the outer rotor motor can be manufactured to best respond to the washing machine, thereby maximizing washing and dewatering efficiency.

Claims (3)

An upper stator having a first salient pole wound around a first coil; A lower stator coupled to the upper stator and having a second salient pole wound around a second coil; An upper rotor having a magnet facing the first salient pole, and having a tubular first shaft disposed at the center thereof to rotate with respect to the upper salient pole; A lower rotor which is provided with a magnet facing the second salient pole, and has a second shaft penetrating the upper and lower stators and the first shaft and rotates with respect to the lower salient pole. Outer rotor type motor. The outer rotor type motor for a washing machine according to claim 1, wherein the upper stator and the lower stator are integrally formed. An upper stator having an upper salient pole wound around the first coil; A lower stator coupled to the upper stator and having a lower salient pole wound around a second coil; An upper rotor having a magnet facing the upper salient pole and having a tubular first shaft at its center, the upper rotor being rotated with respect to the upper salient pole; A lower rotor having a magnet facing the lower salient pole and having a second shaft penetrating the upper and lower stators and the first shaft, the lower rotor being rotated with respect to the lower salient pole; A dehydration tank coupled to any one of the first shaft and the second shaft; Washing machine comprising a; rotary blade coupled to any other of the first shaft and the second shaft.