KR20080078944A - Motor core and manufacturing method for the same - Google Patents

Abstract

A motor core and a manufacturing method thereof are provided to reduce scraps by crossly punching teeth of a unit core to form notch grooves in the same shape as a pole shoe. A motor core includes a plurality of division cores, coupling units(16,17), recessed grooves(8), and notch grooves(19). The plurality of division cores are formed by stacking unit cores(10) punched from a base plate. The coupling units are formed at both ends of the unit core to couple the plurality of division cores. The recessed grooves are formed in a base unit(13) of the unit core to bend the division core or the unit core. The notch grooves are formed at both ends of a tooth(12) of the unit core in the same shape as a pole shoe(11) of the tooth. The unit core has the band-shaped base unit and a plurality of teeth formed along a length of the base unit to be vertically protruded from the base unit.

Description

Motor core and manufacturing method for the same

1 is a perspective view showing a conventional stator core,

2 is a plan view of a unit core showing a punching process of a motor core according to the present invention;

3 is a plan view showing a unit core according to the present invention;

4 is a plan view showing a first embodiment of the bending process according to the present invention;

5 is a plan view showing a second embodiment of the bending process according to the present invention;

6 is a plan view illustrating a coupling process of a unit core according to the present invention.

* Description of the symbols for the main parts of the drawings *

8: Needlework Home 10: Unit Core

11: Folsch 12: Teeth

13 base portion 14 reference hole

16: coupling groove 17: coupling protrusion

19: notch groove 33: gear teeth

38: pin

The present invention relates to a method for manufacturing a motor core, and more particularly, to a motor core and a method for manufacturing the same having an efficient structure.

In general, a washing machine motor includes a stator fixed to a washing machine housing or a tub, a rotor disposed outside the stator and rotated by mutual electromagnetic force with the stator, and a rotating shaft integrally coupled to the rotor. .

The stator includes a core composed of a plurality of teeth spaced apart from each other with a predetermined slot in a circumferential direction and a ring-shaped base portion supporting the teeth, and a coil wound around the teeth of the core and connected to an external power source. . The core is bolted to the washing machine housing or tub.

In such a motor for a washing machine, the stator core of the motor is formed of a plurality of stacked iron pieces, the conventional method of manufacturing the stator core was a method of spirally winding the core band protruding a plurality of teeth, which is used This is illustrated through FIG. 1.

1 is a perspective view showing a conventional stator core.

Referring to FIG. 1, a conventional motor core 101 includes a base part 120 having a long band shape, and a base part protruding along a width direction of the base part 120 and having a slot 140 formed therebetween. It is formed by spirally stacking cores 110 having a plurality of teeth 130 with a predetermined slot 140 therebetween along the lengthwise direction of 120.

Here, the base plate from which the core 110 is punched is formed to have a long length in consideration of the thickness of the core to be laminated, and the core 110 has a width direction at an end along the protruding direction of each tooth 130. The folds 150 extended to each are formed.

Each of the folds 150 is formed in a shape in which the width gradually decreases toward both ends in the width direction of the tooth 130.

In the method of manufacturing a motor core having such a structural feature, a core plate 110 is formed by punching a base plate by a press or the like, and as shown in FIG. 1, a jig (not shown) having a predetermined diameter and the like. Spirally wound around the circumference to a certain height to form a motor core.

By the way, in the manufacturing of the base portion having a long band shape as in the prior art, waste of more than necessary of the base plate is brought, and the operation of bending by laminating one base portion is not easy.

In addition, there is a problem that the bending operation is not easy because stress is generated in the core strip in the process of bending the strip-shaped core strip.

The present invention has been made to solve the above-mentioned conventional problems, an object of the present invention is to provide a motor core that is easy to assemble while saving material in the manufacturing process of the motor core.

In order to achieve the above object, the motor core according to the present invention is formed on both ends of the plurality of divided cores are formed by stacking the unit cores punched from the base plate, and the plurality of divided cores are combined at both ends of the unit core A coupling means, a recess groove formed in the base portion of the unit core for bending the split core or the unit core, and a notch groove formed on both sides of the lower end of the unit core in the same shape as the pole shape of the tooth portion. .

The unit core may include a plurality of strip-shaped base parts and a plurality of teeth protruding in a vertical direction from the base part in a longitudinal direction.

The coupling means is provided with a coupling protrusion at one end in the longitudinal direction of the base portion, the coupling groove is formed at the other end.

In addition, in order to bend the unit core or the split core to a desired dimension, it is preferable that a reference hole is formed on the center line of the tooth.

The notch grooves are formed to reduce scrap generated between the crossed teeth when the unit cores are punched in two rows by crossing each other teeth in the base plate.

In addition, the concave groove is formed in the opposite direction of the tooth for bending of the unit core, is formed in the base portion between the neighboring teeth.

The present invention also provides a punching process of forming a plurality of unit cores by punching a base plate in two rows in which a pair of band-shaped base portions are opposed in the width direction and at least one protruding tooth intersects with each other. And stacking a plurality of unit cores to form a split core, a banding process for bending the split cores, and one or more split cores subjected to the bending process to form an annular stator core. It provides a method of manufacturing a motor core, characterized in that comprising a coupling process.

In the punching process, the unit core is formed of six teeth, and a recessed groove is formed in the base portion of the unit core in order to bend the unit core or the split core.

In the bending process, the recessed groove may be pressurized by being toothed with the teeth of the gear and bent, the jig is coupled between the teeth and the teeth, the jig is coupled to the recessed groove, and the jig is pressed against each other. The single core can be banded.

In the punching process, in order to bend the split core to a desired dimension, a base hole is formed on a line extending the teeth, and the unit cores are punched in two rows from the base plate, and the teeth cross each other when punched. In order to reduce scrap generated in the liver, notched grooves formed in the same shape as that of neighboring unit cores are formed in the teeth and punched out.

In addition, in the punching process, the unit core is provided with a coupling protrusion at one end in the longitudinal direction of the base portion for coupling each split core, and a coupling groove is formed at the other end.

In another embodiment of the present invention, a pair of band-shaped base portions are punched from the base plate in two rows in which the pair of base portions are opposed in the width direction and at least one protruding teeth from the base portions cross each other to generate a plurality of unit cores. A process of bending a band of the unit cores, a stacking process of stacking a plurality of one or more unit cores through the bending process to generate a split core, and combining the at least one split core to form an annular stator core. It provides a method of manufacturing a motor core, characterized in that it comprises a coupling process to be made.

In another embodiment of the present invention, a pair of band-shaped base portions are opposed to each other in the width direction and at least one protruding tooth from the base portion is punched from the base plate in two rows to generate a plurality of unit cores. A punching process, a banding process of bending the unit core, a joining process of combining one or more unit cores subjected to the bending process to form an annular stator core, and stacking a plurality of the annular stator cores. It provides a method for producing a motor core, characterized in that consisting of.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 to 5 are plan views illustrating a method of manufacturing a motor core according to the present invention.

Referring to FIG. 3, the motor core includes a plurality of split cores formed by stacking unit cores 10 formed by punching from a base plate (not shown), and the unit core 10 for combining the plurality of split cores. Coupling means (16, 17) formed at both ends of the), the recessed groove (8) formed in the base portion 13 of the unit core (10) for bending the split core or unit core 10, and the It includes a notch groove 19 formed on both sides of the lower end of the tooth 12 adjacent to the base portion 13 of the unit core 10 in the same shape as the shape of the pole shoe 11 of the tooth 12.

The unit core 10 is formed by protruding six teeth 12 in a length direction of the band-shaped base portion 13 and the base portion 13, and is formed at an end portion in the protruding direction of the tooth 12. The fold shoe 11 extended in the width direction is formed.

In addition, as the tooth 12 crosses and is punched out when the unit core 10 is punched, a notch groove 19 is formed in a portion where the base 13 and the tooth 12 are connected in the same shape as the polche 11. do. This can reduce scrap formed between the intersecting teeth 12.

And the coupling means (16, 17) is a coupling protrusion 17 provided on one side of the base portion 13 in the longitudinal direction of the unit core 10, and the coupling groove provided on the other side of the base portion 13 ( 16).

Accordingly, when the unit core 10 is coupled, the unit core 10 may be coupled to the coupling protrusion 17 and the coupling groove 16 in the circumferential direction to complete the annular stator core.

In addition, the coupling groove 16 is preferably formed in a shape in which the size of the groove is wider toward the inside of the base portion 13, the coupling protrusion 17 has a shape corresponding to the coupling groove 16. It is preferably formed to protrude.

That is, the coupling groove 16 and the coupling protrusion 17 may be formed as described above to prevent shaking during assembly.

Meanwhile, a predetermined air gap must be maintained between the pole shoe 11 and the rotor disposed outside the stator core and rotated by mutual electromagnetic force with the stator, and between the pole shoe 11 and the rotor. The gap should be maintained at regular intervals.

Therefore, the base portion 13 is preferably provided with a reference hole 14 for securing the size on the center line of the tooth (12).

That is, when bending of the unit core 10, the teeth are formed so that each of the poles 11 forming the annular motor core to be spaced apart from the rotor at regular intervals by maintaining a constant angle to the reference hole 14 The base portion 13 should be formed on the center line of the tooth 12.

When bending the unit core 10, the recess groove (8) for reducing the stress generated during bending to facilitate the bending work in the opposite direction of the tooth 12 for bending of the unit core (10) It is formed in the base portion 13 located between the tooth 12 and the adjacent tooth 12.

In addition, the present invention punches the base plate in two rows in which a pair of band-shaped base portions 13 are opposed in the width direction and at least one or more protruding teeth 12 are intersected with each other. Punching process for forming the unit core 10 of the stacking process, lamination process for creating a split core by stacking a plurality of the unit core 10, banding process for bending the divided core, and the division through the bending process It provides a method for manufacturing a motor core comprising a coupling process for combining the core to one or more to form an annular stator core.

As shown in FIG. 2, in the punching process, two rows of unit cores 10 are punched from a base plate (not shown), and the unit cores 10 face each other in the width direction of the base portion 13. And the teeth 12 cross each other and are punched in two rows.

Further, the poles 11 extending in the width direction are formed at the ends along the protruding directions of the teeth 12, respectively. In addition, each of the poles 11 is formed in a form in which the width gradually decreases toward both ends along the width direction of the tooth 12.

Therefore, when the teeth 12 of the unit cores 10 of the two rows cross each other and are punched out, it is preferable that the notches grooves 19 are formed in the teeth 12 by both ends of the pole shoe 11.

When the punching process as described above is applied, the unit cores 10 of the two rows are punched in a straight line, and the notch grooves 19 are generated in the teeth 12 along the longitudinal direction of the polche 11. As a result of punching (10), other unit cores 10 are generated in a portion which has been conventionally scraped, so that the occurrence of scrap is significantly reduced.

A plurality of punched unit cores 10 are stacked as described above to form a split core.

As shown in FIG. 4, the teeth of the gear 33 are tooth-coupled to the recessed hops 8 formed in the base 13 of the unit core 10, and formed in the base 13. The pin 38 is inserted into the reference hole 14 to press the unit core 10 toward the teeth 33 of the gear to bend.

In the bending process according to another embodiment, as illustrated in FIG. 5, the direction of the arrow showing the base portion 13 and the recess groove formed between the teeth 12 and the teeth 12 of the unit core 10 is shown. The unit core 10 may be bent by mutually pressing with each other.

In the bending process as described above, the unit core 10 may be bent to a desired dimension by using the reference hole 14.

The split core, which has undergone the bending process as described above, has an annular stator core formed by combining at least one as shown in FIG. 6.

In the stator core according to the present embodiment, an annular stator core is formed by six unit cores 10, and each unit core 10 has a coupling protrusion 17 and a coupling groove 16 in a circumferential direction. Stator core is completed by combining.

According to another embodiment of the present invention, a motor core may be formed from a base plate in two rows in which a pair of band-shaped base portions 13 are opposed in the width direction and at least one protruding tooth 12 from the base portion 13 crosses each other. A punching process to be punched to generate a plurality of unit cores 10, a bending process of bending the unit cores 10, a lamination process of stacking a plurality of one or more unit cores 10 subjected to the bending process, The bending may be completed by a method of manufacturing a motor core, comprising a coupling process of combining one or more stacked unit cores 10 to form an annular stator core.

The motor core according to another embodiment is a base plate in two rows in which a pair of band-shaped base portions 13 are opposed in the width direction and at least one protruding tooth 12 from the base portion 13 crosses each other. The annular stator core is formed by combining one or more of a punching process for generating a plurality of unit cores 10, a bending process for bending the unit cores 10, and one or more unit cores 10 that have undergone the bending process. It can be completed in the manufacturing method of the motor core, characterized in that it comprises a bonding process to be made, and a lamination process for laminating a plurality of the annular stator core.

So far, the present invention has been described with reference to its preferred embodiments, but one of ordinary skill in the art to which the present invention pertains may implement another embodiment of a modified form within the essential technical scope of the present invention. .

Referring to the effects of the manufacturing method of the motor core according to the present invention configured as described above are as follows.

When two rows of unit cores cross each other in a straight line, the notch grooves are generated in the teeth along the longitudinal direction of the polshes, and when the unit cores are punched, other unit cores are generated in a portion that was conventionally scraped. Can be reduced.

Forming recessed grooves in the base portion can reduce the stress when bending the unit core can facilitate the bending operation.

By combining unit cores to form a motor core, the motor core can be manufactured in an efficient manner.

Claims (16)

A plurality of split cores formed by stacking unit cores formed by punching from the base plate; Coupling means formed at both ends of the unit core for coupling the plurality of split cores; A recess groove formed in a base portion of the unit core for bending the division core or the unit core; And a notch groove formed on both sides of the lower end of the unit core in the same manner as the shape of the pole of the tooth portion. The method of claim 1, wherein the unit core A motor core characterized in that it comprises a belt-shaped base portion and a plurality of teeth formed along the longitudinal direction of the base portion, protruding in the vertical direction from the base portion. The method of claim 2, The recess groove is formed in the opposite direction of the tooth for bending of the unit core, characterized in that formed in the base portion between the neighboring teeth. The method of claim 1, The coupling means has a coupling protrusion at one end along the longitudinal direction of the base portion, the other end is a motor core characterized in that the coupling groove is formed The method according to claim 1, wherein A motor core, characterized in that the base hole is formed on the center line of the tooth in order to bend the unit core or the split core to a desired dimension. The method of claim 1, The notch groove When the unit core is punched in two rows by crossing each other in the base plate, the motor core is formed to reduce the scrap generated between the crossed teeth. A punching process of forming a plurality of unit cores by punching the base plates in two rows in which a pair of band-shaped base portions are opposed in the width direction and at least one or more protruding teeth cross each other; A lamination process for generating a divided core by stacking a plurality of unit cores; A banding process of bending the split core; And a joining process of combining the at least one split core through the bending process to form an annular stator core. The method of claim 7, wherein In the punching process The unit core is a manufacturing method of a motor core, characterized in that formed of six teeth. The method of claim 7, wherein In the punching process, A method for manufacturing a motor core, characterized in that the recessed groove is formed in the base portion of the unit core for bending the unit core or split core. The method of claim 9, In the bending process, The recess groove is a method for manufacturing a motor core, characterized in that the teeth are pressed and banded to the teeth of the gear. The method of claim 9, In the bending process, A jig is coupled between the teeth and the teeth, and a jig is coupled to the concave groove to press each of the jigs against each other to band the single core. The method of claim 7, wherein In the punching process, And a reference hole is formed on a line extending the teeth in the base part to bend the split core to a desired dimension. The method of claim 7, wherein In the punching process, The unit cores are punched in two rows on the base plate, and a notch groove formed in the teeth is formed and punched in the teeth so as to reduce scrap generated between teeth intersected with each other. Method for producing a motor core. The method of claim 7, wherein In the punching process, The unit core has a coupling protrusion at one end in the longitudinal direction of the base portion for coupling the respective divided core, the other end of the motor core manufacturing method characterized in that the coupling groove is formed. A punching process in which a pair of band-shaped base portions are opposed in the width direction and are punched from the base plate in two rows in which at least one protruding teeth from the base portions cross each other to generate a plurality of unit cores; A banding process of bending the unit core; A stacking process of stacking a plurality of one or more unit cores through the bending process to generate a split core; And a coupling process of combining the at least one split core to form an annular stator core. A punching process in which a pair of band-shaped base portions are opposed in the width direction and are punched from the base plate in two rows in which at least one protruding teeth from the base portions cross each other to generate a plurality of unit cores; A banding process of bending the unit core; Combining the at least one unit core subjected to the bending process to form an annular stator core; Laminating step of laminating a plurality of the stator core of the annular; manufacturing method of the motor core comprising a.

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