KR100657660B1 - Rotor of motor for drum type washing machine - Google Patents

Abstract

Disclosed is a rotor structure of a motor for a drum washing machine, in which a rotor is manufactured in an optimized simple shape, which is easy to assemble, and in which rotational force transmission between the rotating shaft of the motor and the rotor can be stabilized. According to the present invention, the outer end of the yoke surface is bent end portion is formed in a circular cross-section, the bent portion is formed smaller than the height of the permanent magnet, the inclined surface for setting the position of the permanent magnet is formed at the connection portion of the bottom surface of the rotor and the yoke surface On the outer circumferential surface of the shaft bushing, an insert portion for insert molding is formed on the rotor so that the rotor and the shaft bushing are integrally formed, and a bottom hole of the rotor is radially formed, and the blade has a blade extending integrally with the shaft bushing. Provided is a rotor structure of a motor for a drum washing machine inserted and configured. As a result, the rotor installed in the drum washing machine in which the outer rotor type non-commutator DC motor is installed is simply and optimally manufactured in terms of strength and functional aspects, and the rotational force is stably transmitted while reducing the manufacturing labor of the motor. This has the effect of being improved.

Drum washing machine, motor, rotor, drive unit

Description

Rotor structure of motor for drum washing machine {ROTOR OF MOTOR FOR DRUM TYPE WASHING MACHINE}

1 is a perspective view of a conventional rotor.

Figure 2 is a cross-sectional view of the conventional rotor and the rotating shaft coupled state.

3 is a perspective view of a rotor according to the present invention.

Figure 4 is a cross-sectional view of the drive unit of the drum washing machine provided with the rotor of the present invention.

<Description of the symbols for the main parts of the drawings>

10: rotor 15: yoke face

20: permanent magnet 22: bend

24: slope 30: shaft bushing

35: blade 36: long

The present invention relates to a rotor structure of a motor for a drum washing machine, and more particularly, a rotor structure of a motor for a drum washing machine, in which a rotor of an outer rotor type motor used in a drum washing machine is simply manufactured and assembled to improve the manufacturability of the rotor. It is about.

Among the various motor starting methods, induction electromotive motors which are synchronized by induction electromotive force are a kind of rotational magnetic motor, which is a kind of AC motor in which rotational force is generated by interaction between the rotating magnetic field generated in the stator and the induction magnetic field generated in the rotor. .

It can be variously designed as single phase, three phase induction motor, three phase winding type induction motor, etc., and is one of the most easy-to-use motors among AC motors.

Such induction electric motors are suitable as power motors due to the characteristics of rotational speed and long lifespan according to the load, and among the small ones, single phase condenser motors are most widely used.

In the basic configuration of the induction electric motor as described above, the induction magnet generated from the stator is supported by a rotating shaft supported by the housing and a stator that is fixed to the housing and receives power from the outside through a coil wound to generate the induction magnet, and a bearing installed in the housing. It is provided with a rotor that rotates with the rotary shaft coupled by.

Such an induction electric motor is a current induced in the secondary winding by the electromagnetic induction of the primary winding connected to the power source, and obtains the rotational force by the interaction of the current and the rotating magnetic field induced in the secondary winding, the stator and the rotor It is divided into inner rotor type and outer rotor type according to the relative position.

Among the motor types described above, an outer rotor type induction motor has recently been utilized in which a rotor is provided outside the stator to increase torque at the same volume and utilize the internal space of the stator for other purposes.

The outer rotor type induction motor has a characteristic that a rotor composed of a drive shaft, a magnet, a rotor case, and the like rotates outside the stator composed of an iron core, a core, a base, and a bearing, that is, the rotor rotates around the stator.

The rotor of such an outer rotor type induction motor is shown in FIG. 1.

The rotor shown in FIG. 1 is a steel rotor (1) press-formed to form an exterior of a motor, a laminated iron core (2a) and a laminated iron core (2a) which are punched into the inner circumferential surface of the rotor (1) and forcibly pressed in. Rotor core (2) consisting of a ring-shaped ending member (2b) provided on the upper and lower surfaces of the), and a rotor bushing (3) for coupling the rotor (1) and a rotating shaft (not shown).

As such, the rotating rotor 1 is used with the rotor bushing 3 to transmit the rotational force to the axis of rotation, the combination of the rotor 1 and the rotor bushing 3 being shown in FIG. 2.

In FIG. 2, the rotor bushing 3 is fastened by a bolt 6 below after being laid out on the rotary shaft 4, and when the rotor bushing 3 is fastened, a fixing protrusion 7 formed on its outer circumferential surface or a separate The bolts 8 are fastened to each other in a manner that is coupled to the rotor 1. In the drawings, reference numeral 5 denotes a bearing for supporting the rotating shaft 4.

However, in the structure of the rotor 1 as described above, the assembly process is difficult due to the press-fit of the rotor core 2 using the laminated iron core 2a and the ending member 2b, and the rotor bushing 3 and the rotor 1. By assembling the assembly by a separate bolt 6 there is a problem that the instability of the clamping force is caused to reduce the stability of the rotor.

The present invention has been invented in view of the above problems, and an object of the present invention is to manufacture a rotor in an optimized simple shape, easy to assemble, and a drum washing machine for which the rotational force transmission between the rotating shaft of the motor and the rotor can be stabilized. It is to provide a rotor structure of a motor.

In order to achieve the above object, the present invention, the rotating shaft is installed in the bearing housing, and a permanent magnet for magnetic action with the winding field of the stator is attached while rotating from the outside in a manner to accommodate the stator of the winding field In the rotor of the drum washing machine comprising a rotor having a yoke surface and a shaft bushing for fastening the rotor and the rotating shaft, the outer end of the yoke surface is bent in a circular cross-section end of the permanent magnet A bent portion is formed smaller than the height, the inclined surface for setting the position of the permanent magnet is formed on the connecting portion of the yoke surface and the bottom surface of the rotor, the insert portion for insert molding the rotor is formed on the outer peripheral surface of the shaft bushing The rotor and the shaft bushing are integrally formed, and the bottom of the rotor There is a radial slot is formed, the elongated holes are to provide a rotor structure of a drum washing machine motor, characterized in that the blade is configured to be extended to the shaft and bushing are integrally sapseol.

The present invention is characterized in that the rotor rotating in the outer rotor type non-commutator DC motor is simply and optimally manufactured in terms of strength and functional aspects, thereby providing a rotor in which the rotational force is stably transmitted while reducing the manufacturing labor of the motor.

The rotor of the present invention having the above characteristics is shown in FIG. 3.

The rotor 10 of the outer rotor-type motor according to the present invention is formed in a cylindrical shape made of steel, which is formed by being divided into a bottom portion 18 (FIG. 4) and a shaft bushing 30 of the rotor 10 as a whole. .

More specifically, the insert portion 39 for insert molding the rotor 10 is formed on the outer circumferential surface of the shaft bushing 30 so that the rotor 10 and the shaft bushing 30 are integrally formed so that the rotor ( 10) can be manufactured integrally.

In addition, a long hole 36 is formed radially in the bottom portion 18 of the rotor 10, and a blade 35 extending integrally with the shaft bushing 30 is inserted into the long hole 36.

The periphery of the long hole 36 in which the blade 35 is inserted is formed with a protruding rib 38 which protrudes upward by burring to reinforce the strength of the bottom portion 18.

In addition, the press-processed rotor 10 extends to both side walls to form a yoke surface 15. The yoke surface 15 has a permanent magnet 20 for magnetic interaction with the field-wound stator. It is attached to the yoke surface 15 to the inner circumferential surface of the rotor 10 by bonding or other method so that the rotor 10 is not separated during rotation of the rotor 10.

On the other hand, the outer end of the yoke surface 15 is formed with a bent portion 22 is formed in a circular cross section smaller than the height of the permanent magnet 20, that is, the permanent magnet 20 is the yaw of the rotor 10 The end length of the outer end is limited to be attached to protrude partly upward from the large surface 15 side end to improve the adhesion of the permanent magnet 20.

In addition, the inclined surface 24 is formed at the bottom surface connection portion of the yoke surface 15 and the rotor 10, and the inclined surface 24 is formed when the permanent magnet 20 is attached to the yoke surface 15. It is for setting the position easily.

The motor installation unit of the drum washing machine according to the present invention in which the rotor configured as described above is installed is shown in FIG. 4.

The drum washing machine shown in FIG. 4 is not intended to limit the present invention, and as an embodiment of the motor installation unit of the drum washing machine in which the present invention can be installed, for example, the drum washing machine of the present embodiment is installed with an inclined drum. Regardless of the gist, it is well known that the present invention can be applied to a case where the drum is installed horizontally, and various modified embodiments are possible.

The motor installation unit of the drum washing machine is installed at the rear of the cabinet 40 which forms the exterior of the washing machine, and the door 42 is installed at the front of the cabinet 40 to suspend laundry from the inside of the cabinet 40. It is possible to open and close so as to be introduced into the drum 44 and the tub 45 suspended by the ().

The drum 44 is rotatably installed inside the tub 45. The drum 44 is connected to a motor, and the rear end of the drum 44 is injection molded integrally with the shaft 50 of the motor. The rotational force of the motor is formed to be transmitted to the drum 44.

The shaft 50 connected to the drum 44 is supported at both ends by a bearing 53 installed inside the bearing housing 52, and an end of the bearing housing 52 is separated from the installation of the motor by a base plate ( 54) is installed.

The base plate 54 is installed in such a manner as to surround the outside of the bearing housing 52 and the tub 45 of the motor. The base plate 54 serves to fix the bearing housing 52 of the motor to the tub. While being installed to protect the outer surface of the tub 45, in particular serves to separate the motor installed to one side of the base plate 54 and the tub 45.

In the base plate 54, the stator of the motor (not shown) is fixed to the base plate 54 in a predetermined fixing manner, and the stator is installed to perform magnetic action by a predetermined field winding.

In addition, the rotor 10 of the present invention installed in such a manner as to accommodate the stator is installed to surround the stator in a cylindrical shape while the permanent magnet 20 is attached to the inner surface to perform magnetic action with the stator.

As described above, the rotor 10 is composed of a bottom portion 18 forming a cylindrical bottom and a yoke surface 15 forming an upstanding outer surface, which is insert-molded in the center of the rotor 10. The shaft bushing 30 is formed integrally with the rotor 10.

Thus, the shaft bushing 30 is integrally processed in the rotor 10, so that the shaft bushing 30 connects the shaft 50 and the rotor 10 so that the rotational force of the rotor 10 is transmitted to the shaft 50. Be sure to

By the motor provided with the rotor 10 of the present invention configured as described above, in the inner surface of the rotor 10 of the present invention to act on the stator when the washing machine is operated, the inclined surface 24 from the yoke surface 15 Furnace permanent magnet 20 is attached to the optimal position setting to have an optimal magnetic interaction with the rotor 10, whereby the rotor 10 is rotated at the optimum rotational force to be integrally attached to the rotor 10 The rotating force is transmitted to the shaft bushing 30.

On the other hand, by the bending portion 22 formed in a predetermined radius on the outer surface of the rotor 10 is prevented rigid deformation due to the rotational force of the rotor 10 is maintained a stable rotational force.

In addition, the inside of the rotor 10 is radiated by the blade 35 inserted into the long hole 36 formed radially from the bottom portion 18 of the rotor 10, such a blade 35 is a shaft bushing 30. It is formed integrally with the) and is easy to process, by forming the long hole 36 in the bottom portion 18 of the rotor 10, the installation of the blade 35 is easy without a separate processing process, the blade 35 The reinforcement of the rotor 10 together with the reinforcement of the long hole 36 is achieved by the protruding ribs 38 formed at the periphery of the long hole 36 into which the long holes 36 are inserted.

Thus, the rotational force transmitted to the shaft bushing 30 is axially supported by the bearing 53 supported inside the bearing housing 52 to rotate so that the drum 44 integrally molded with the shaft 50 rotates. The washing is performed.

Thus, the present invention, while the yoke surface 15 and the shaft bushing 30 of the bottom and side of the rotor 10 that rotates in the motor of the drum washing machine integrally molded by insert injection for the internal heat dissipation of the rotor 10 After the blade 35 is integrally formed with the shaft bushing 30, the blade 35 is inserted into the long hole 36 of the rotor 10 to facilitate processing. In particular, the yoke surface 15 of the rotor 10 has an inclined surface 24. Is formed is to facilitate the attachment position setting of the permanent magnet (20).

By the rotor of the motor for a drum washing machine of the present invention, the rotor installed in the drum washing machine in which the outer rotor type non-commutator DC motor is installed is optimally simply manufactured in view of strength and functional aspects, thereby reducing the manufacturing manpower of the motor while rotating power. The delivery of the stable will have the effect of improving the reliability of the drum washing machine.

While the invention has been shown and described with respect to specific preferred embodiments thereof, the invention is not limited to the embodiments described above, and is commonly used in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Anyone with knowledge will be able to make various variations.

Claims (3)

The yoke surface to which the rotating shaft 50 arranged in the bearing housing 52 and the permanent magnet 20 for magnetic action with the winding field of the stator are rotated while receiving the stator of the winding field. In a rotor of a drum washing machine comprising a rotor (10) having a shaft (15) and a shaft bushing (30) which is mediated for engaging the rotor (10) with the rotating shaft (50), The outer end of the yoke surface 15 is bent portion 22 is formed to be smaller than the height of the permanent magnet 20 while the end is bent in a circular cross section, The yoke surface 15 and the bottom surface portion 18 of the rotor 10 to set the position of the permanent magnet 20 to the connection portion of the yoke surface 15 and the bottom portion 18 of the rotor 10 An inclined surface 24 formed at a connection portion of the An insert part 39 formed on an outer circumferential surface of the shaft bushing 30 so that the rotor 10 and the shaft bushing 30 are integrally formed by insert molding on the rotor 10, Long hole 36 formed radially on the bottom portion 18 of the rotor 10, Rotor structure of a motor for a drum washing machine comprising a blade (35) extending integrally with the shaft bushing (30) and inserted into the long hole (36). delete The protruding rib 38 of claim 1, wherein the periphery of the long hole 36 into which the blade 35 is inserted is formed to protrude upward by burring to reinforce the strength of the bottom portion 18. The rotor structure of the motor for drum washing machines characterized by the above-mentioned.

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