KR200160581Y1 - Housing constructing structure of washing maching motor - Google Patents

Abstract

The present invention relates to a housing coupling structure of a motor for a washing machine, the flange portion is extended to the outer peripheral surface of the lower housing, a plurality of bent projections protrude in a radial form to detachably couple the upper housing to the flange portion, Stress distribution means is provided at the boundary between the bent protrusion and the flange to disperse the concentrated stress generated when the bent protrusion is bent, thereby preventing the bent protrusion from being easily broken when separating and / or combining the upper and lower housings. In particular, it is possible to increase the coupling force of the housings, particularly during operation of the motor, thereby minimizing vibration noise.

Description

Housing coupling structure of washing machine motor

The present invention relates to a housing coupling structure of a motor for a washing machine, and more particularly, to a housing coupling structure of a motor that allows the upper and lower housings to be firmly coupled by changing the structure of the housing supporting and protecting the rotor. .

In general, a motor applied to a domestic washing machine is to provide a rotational force to a shaft assembly such as a pulsator or agitator to make a special water flow in the water stored in the washing tank. Stator core 10 and a rotor (not shown) rotatably positioned therein and upper and lower housings 12 coupled to enclose stator core 10 to protect and support the rotor as shown in FIG. 14).

The upper housing 12 is provided with a plurality of ventilation holes (not shown) for dissipating heat generated when the motor is driven to the outside, and the lead wire 16 for applying current to the stator core 10 is connected. Multiphase coils are wound. The rotor is provided with a rotor that is rotated at a high speed due to the magnetic field generated by the coil and a rotor shaft 18 that is press-fitted to the center thereof and supported by the upper housing 12.

Four bent protrusions for engaging the flange portion 14a of the lower housing 14 coupled with the upper housing 12 to engage the flange portion 12a extending to the outer circumferential surface of the upper housing 12 as shown in FIG. 20 is protruded at intervals of 90 degrees, and the bent projection 20 is perpendicular to the flange portion 14a.

The conventional motor for a washing machine configured as described above inserts a rotor including a rotor shaft 18 into a coiled stator core 10 and then combines the upper and lower housings 12 and 14 with the bending protrusions 20. . That is, the four bent projections 20 protruding at right angles to the flange portion 14a while the flange portions 12a and 14a extending to the upper and lower housings 12 and 14 are in surface contact, respectively, Complete the engagement of the upper housing 12

Subsequently, when a current is applied to the lead wire 16 made of the main, sub and common wires connected to the coil to operate the motor, a magnetic field is generated in the coil and the rotor and the As the press-fitted rotor shaft 18 rotates together, the connecting member such as the shaft assembly and the rotating blade or the stirring blade coupled to the upper portion thereof are rotated in the washing tank. At this time, the heat generated by the current applied to the coil is discharged to the outside through a plurality of vents provided in the upper housing 12.

However, since the bending protrusion protrudes at a right angle to the flange portion of the lower housing coupled to the upper housing as described above, the stress is concentrated at the right angle portion of the bending protrusion when bending and extending the bending protrusions to separate and / or separate the housings. As this is applied, the bending protrusion is easily broken, and thus there is a problem in that the housings cannot be firmly coupled without flow.

The present invention is to solve the above problems, an object of the present invention is to project at least four or more bending protrusions with improved structure in the flange portion of the lower housing, bending when separating and / or combining the upper and lower housings Providing a housing coupling structure of the motor for a washing machine can prevent the protrusion is easily broken, in particular to increase the coupling force of the housings during operation of the motor to thereby reduce the vibration noise.

1 is a perspective view schematically showing a motor for a washing machine according to the prior art;

2 is a plan view showing a lower housing applied to the motor of FIG.

3 is a perspective view showing a housing coupling structure of the washing machine motor according to the present invention;

Figure 4 is a plan view showing a lower housing in the housing of the motor according to the present invention.

Explanation of symbols on the main parts of the drawings

10 stator core 12,40 upper and lower housings

12a, 40a: flange portion 16: lead wire

18: rotor shaft 42: bending protrusion

42a: Riding Home

Features of the present invention for achieving the above object, the rotor is rotatably inserted into the stator core, is coupled to the outside of the stator core is provided with an upper and lower housing coupled to protect the rotor In the housing coupling structure of the washing machine motor, the lower housing has a flange portion extending to its outer circumferential surface, a plurality of bent projections protrude in a radial shape to detachably couple the upper housing to the flange portion, The boundary between the bent protrusion and the flange portion is achieved by providing a stress distributing means to disperse the concentrated stress generated when the bent protrusion is bent.

Stress distribution means according to a preferred embodiment of the present invention is achieved by being a rounded groove machined on the boundary of the bending projection.

Hereinafter, a preferred embodiment of the housing coupling structure of the washing machine motor according to the present invention will be described in detail with reference to the accompanying drawings.

3 and 4 is a view showing a housing coupling structure according to the invention, for the convenience of the description in the configuration of the motor for a washing machine, the same reference numerals for the same parts as the conventional configuration.

Outside the stator core 10 into which the rotor including the rotor shaft 18 is rotatably inserted, upper and lower housings 12 and 40 are coupled to protect and secure the rotor, and are wound around the stator core 10. The lead wire 16 is connected to the coil so that the current can be applied from the outside.

The outer peripheral surfaces of the upper and lower housings 12 and 40 are each extended with flange portions 12a and 40a so as to be in surface contact with each other, and the upper housing 12 is coupled to the flange portions 40a of the lower housing 40. At least four or more bent protrusions 42 protrude in a radial shape to prevent the concentration of stress generated when the housings are coupled and / or separated at the boundary between the flange portion 40a and the bent protrusions 42. Stress distribution means are provided to ensure that the

The stress dispersing means is a rounding groove 42a which is processed at the boundary of the bending protrusion 42, and the stress distributing means can be deformed as a round part which adds flesh to the boundary of the bending protrusion 42.

Referring to the action of the housing coupling structure of the washing machine motor according to the present invention configured as described above in detail as follows.

The rotor including the rotor shaft 18 is rotatably inserted in the stator core 10 and then the flange portions 12a and 40a of the upper and lower housings 12 and 40 to the outside of the stator core 10. Combine each while making a surface contact. That is, a plurality of bending protrusions 42 protruding radially from the lower housing 40 with respect to the flange portion 12a of the upper housing 12 are bent and coupled. At this time, the concentrated stress generated when the bending protrusions 42 are bent is distributed by stresses by the rounding grooves 42a provided at the boundary between the flange portion 40a of the lower housing 40 and the bending protrusions 42. (42) can be prevented from being damaged.

Then, when a current is applied to the lead wire 16, this current is transmitted to the coil connected to the lead wire 16, generating a magnetic field, and the rotor with the rotor in which the rotor shaft 18 is pressed into the stator core 10. By interaction, the rotor rotates to drive the shaft assembly.

As described above, according to the housing coupling structure of the motor for a washing machine according to the present invention, at least four bending protrusions having an improved structure at the flange portion of the lower housing are projected to separate and / or combine the upper and lower housings. Can be prevented from being easily broken, and in particular, the coupling force of the housings can be increased during operation of the motor, thereby minimizing vibration noise.

The present invention is not limited to the above-described specific preferred embodiments, and any person having ordinary skill in the art to which the present invention pertains may make various modifications without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims (3)

In a housing coupling structure of a motor for a washing machine, a rotor is rotatably inserted into a stator core, and is coupled to an outer side of the stator core and provided with an upper and a lower housing coupled thereto to protect and support the rotor. The lower housing has a flange portion extended to its outer circumferential surface, and a plurality of bent protrusions protrude radially to the flange portion so as to detachably couple the upper housing, and the bent protrusion is formed at the boundary between the bent protrusion and the flange portion. Housing coupling structure of the motor for a washing machine, characterized in that the stress distribution means is provided so as to disperse the concentrated stress generated when bending. The housing coupling structure of a motor for a washing machine according to claim 1, wherein the stress distributing means is a rounding groove machined at a boundary of the bending protrusion. 3. The housing coupling structure of a motor for a washing machine according to claim 1 or 2, wherein the stress distributing means is a round portion in which a separate flesh is added to a boundary portion of the bending protrusion.