KR101913088B1 - annular retaining type motor stator capable of concentrically fastening - Google Patents

Abstract

The present invention relates to an annular retaining type motor stator capable of concentrically fastening, comprising: a split stator (100) which is connected in an annular shape by connecting ends thereof; And a pin (200) passing through the end connecting portion of the stator (100) to keep the stator in an annular shape. The stator (100) One end of each of the molds forms an end on the upper side of the center line in the height direction and the other end forms an end in the height direction center line, And the stator 100 may be provided with one or more deformed ends selected from among the ends of the molds formed with the opposite ends turned upside down or both ends of the molds formed with the protrusions and the grooves receiving the protrusions, And the pin 200 is formed in a shape of a band having a predetermined width instead of a shape of a bar , And both end portions are formed to have an engaging end 204 bent inwardly so that the respective end portions can be engaged with each other and a portion of a predetermined position in the longitudinal direction And the stator 100 is connected to the stator 100 using the band-shaped pin 200. The stator 100 is connected to both ends of the pin 200, And the stator (100) is firmly fastened by the pin (200) so as to be annularly retained, so that the annular retaining type motor A technique relating to a stator is disclosed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an annular retaining type motor stator capable of concentrically fastening,

The present invention relates to an annular retaining type motor stator capable of concentrically fastening, and more particularly to an annular retaining type motor stator having a plurality of divided cores connected in an annular shape, The present invention relates to an annular retaining type motor stator capable of concentrically fastening which can be easily separated as well as easy to fasten.

Unless otherwise indicated herein, the contents set forth in this section are not prior art to the claims of this application and are not to be construed as prior art to be included in this section.

Generally, a motor is a device that converts electrical energy into rotational energy by using a force that a current-carrying conductor receives in a magnetic field, and is used in almost all industrial fields such as various electronic devices, industrial and household appliances, toys, and automobiles.

Especially, in the field of automobiles, there are various kinds of motors such as a starter motor, a radiator fan motor, a window brush motor, a fan motor for air conditioning, a motor for a fuel pump, a window shield motor, a door lock motor, Motor, ABS, TCS, and other control motors.

Generally, an auxiliary steering device is used as a device for assuring the stability of steering of the vehicle. In the past, the auxiliary steering device was used as a device using hydraulic pressure. However, in recent years, An excellent electronic power steering system is used.

The electric steering system (EPS) drives the motor in an electronic control unit according to operating conditions sensed by a vehicle speed sensor, a torque angle sensor, and a torque sensor to ensure swing stability and provide quick restoring force, To enable safe driving.

This EPS system assists the driver in steering the steering wheel so as to steer the steering wheel so that the steering operation can be performed with less force, and a BLDC motor is used as the motor.

BLDC motor (DC brushless DC motor) refers to a DC motor with an electronic rectifier installed in the DC motor except for the mechanical contacts such as brushes and commutators. The main part of the motor is composed of a stator and a rotor. The stator is wound with a coil and the rotor is coupled with a magnet so that the rotor rotates by mutual electromagnetic interaction.

Such a stator is made up of a core and a coil. In recent years, generally, a plurality of divided cores are connected in an annular shape.

1 is a plan view showing a segmented core of an EPS motor stator according to the prior art.

Each of the divided cores 1 of the core of the EPS motor stator is constituted by a yoke 2 which is annularly connected to each other on the outer circumferential side and a tooth 3 which faces the magnet (not shown) A coil (not shown) is wound around the outer circumferential surface of the tooth 3 to generate an electromagnetic force.

Fig. 2 is an enlarged plan view showing a joining portion of such a divided core.

The yokes 2 of the respective divided cores 1 are formed in an annular shape so as to be coupled with each other on the side surfaces as described above. The yoke 2 has groove portions 5, 6 are formed.

At this time, the protruding portions 6 formed on the yoke 2 of each of the divided cores 1 are inserted into the groove portions of the adjacent divided cores, so that a bonding force can be generated between them.

In the conventional split core 1, the protrusions 6 and the groove portions 5 are disposed on both sides of the yoke 2 and are coupled to each other. In this case, the yoke is a ring-shaped stator core. In this case, So that the assembling process is difficult and there is a problem in disassembling each divided core during the decomposition or maintenance.

Further, after the coupling is completed, there is a phenomenon in which the concentric cores are twisted between the divided cores, and such errors are weighted according to use, and cogging torque is increased to increase noise and vibration.

FIG. 3 is a view showing a conventional stator assembly by overmolding, FIG. 4 is a view showing a conventional stator assembly by press-fitting, FIG. 5 is a view showing a conventional stator assembly by welding, Fig. 3 is a view showing stator assembly by serration.

3 to 6 illustrate various conventional coupling methods such as injection, welding, toothed coupling and the like including the coupling method of the split core press-fitting as described above. Conventional coupling methods include injection, welding, A separate process such as forming a saw tooth is required, and an unnecessary loss such as production, operation, cost, and time is generated.

On the other hand, the stator is most efficient to make the barrel, but it is divided and welded after the winding due to the problem of the assembling due to the winding, etc. However, the conventional joining methods as described above place more importance on the assemblability than efficiency, A new type of stator coupling method is required to satisfy all the efficiencies equivalent to the efficiency of a barrel type.

1. Korean Patent Registration No. 10-0465591 (December 30, 2004) 2. Korean Patent Registration No. 10-0964540 (June 10, 2010) 3. Korean Patent Registration No. 10-1135251 (Apr. 03, 2012)

There is provided an annular retaining type motor stator which can be coupled in an annular holding state during assembly of a stator on a divided phase, and which can be easily separated and concentrically fastened by the stator.

The present invention also provides an annular retaining type motor stator which is difficult to disassemble each of the stator in the process of disassembling or repairing due to difficulty in assembling due to the fastening method.

Also, there is a need for providing an annular retaining type motor stator in which a phenomenon in which the concentricity of the stator is distorted after the engagement is completed, and an error caused by the rotation is increased to thereby prevent noise and vibration generated by increasing cogging torque do.

Further, it is an object of the present invention to provide an annularly-retained type motor stator in which no separate processes such as injection, welding, and saw-tooth formation are required, and unnecessary loss such as manufacture, operation, cost and time is not generated.

Further, it is desirable to provide an annular-type retaining-type motor stator in which the efficiency of assembling of windings and the like and efficiency comparable to that of a cylindrical type stator are satisfied, thereby improving the efficiency of motor performance.

The annular retaining type motor stator according to the embodiment includes a split-type stator which is connected in an annular shape by connecting end portions thereof, and a pin which penetrates through a connection portion between the end portions of the stator and holds the stator in an annular shape At both ends of the stator, the split stator is maintained at a constant height, and the ends of the stator having different heights are formed so as to be fastened in an annular shape.

According to an embodiment of the present invention, the stator is formed by using any one of the ends of the mold formed in such a manner that the both ends are inverted upside down, or both ends of the mold are inverted and the ends of the mold are formed with protrusions and grooves for receiving the protrusions, And is fastened in an annular shape

According to the embodiment, the side surface of the fin is provided with a cut surface for restraining the lateral flow of the stator.

According to the embodiment, a thread for fastening with the stator is formed at a predetermined position on the outer circumferential surface of the pin.

The above-described annular-type retaining-type motor stator capable of concentrically fastening can be engaged in an annular holding state when assembling a split-phase stator, thereby facilitating the concentric fastening of the stator and facilitating separation.

 In addition, it has a merit that the assembling process becomes difficult due to the coupling by the forcibly fitting method, and the conventional problem that it is difficult to disassemble each stator during the decomposition or maintenance is solved.

 In addition, there is a merit that the concentricity of the stator tends to be distorted after the coupling is completed, the error due to the torsion is increased, and the noise and vibration generated by the increase of the cogging torque are not generated.

Further, there is no need for a separate process such as injection, welding, and saw-tooth formation, and there is an advantage that an unnecessary loss such as manufacturing, operation, cost, and time is not generated.

In addition, the assemblability of the windings and the efficiency comparable to the stator efficiency of the tubular type are satisfied, thereby improving the efficiency of the motor performance.

1 is a plan view showing an EPS motor stator core according to the prior art;
BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to an EPS motor stator.
3 shows a conventional overmolded stator assembly.
4 is a view showing a conventional stator assembly by press-fitting.
5 is a view showing a conventional stator assembly by welding;
6 is a view showing a conventional stator-type stator assembly.
7 is a view for showing a concept of a method of fastening an annular retaining type motor stator capable of concentric locking according to an embodiment of the present disclosure by pinning.
FIG. 8 is a view showing a method for fastening a concentric fastening type motor stator of an annular holding type according to an embodiment of the present disclosure by pinning; FIG.
9 is a view showing an example in which the shape of the stator shown in Fig.
Fig. 10 is a view showing an example of a fastening method by mutual engagement of motor stator by deforming a part of the stator shown in Fig. 8 into a pin shape; Fig.
Fig. 11 is a view showing a pin-shaped modification of the fastening method according to the present invention shown in Figs. 8 to 10; Fig.
Fig. 12 is an example in which the pin shown in Figs. 8 and 9 is deformed into a bolt shape so that the motor stator is fastened by a fastening method by a pin engagement by a screw coupling method.
FIG. 13 is an example in which the end of the pin shown in FIGS. 8 and 9 is deformed in a ring shape so that the motor stator is fastened by a fastening method using a pin.
Fig. 14 is a view showing an example in which a fastening method of a motor stator incorporating a pinning method in a longitudinal direction shown in Figs. 8 to 13 is grafted in a transverse direction; Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like numbers refer to like elements throughout.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

Before the description of the present disclosure, it should be noted that, prior to the description of the present disclosure, it is to be understood that the scope of the present invention is not limited to the disclosed embodiments, but may be applied to other types of bearings such as EPS, magnet, magnet shoe, case, communicator, shaft, core, bearing, damping coupler, cover, damper, seat rubber, grommet, Bolts, and the like, and a detailed description thereof will be omitted.

Further, the concentric fastening type motor stator of the present disclosure has a plurality of divided shapes such as a split core of the EPS motor stator according to the prior art described with reference to the drawings shown in Figs. 1 and 2. In the conventional split core 1, the protrusions 6 and the groove portions 5 are disposed on both sides of the yoke 2 and are coupled to each other. In this way, the yoke becomes a stator core having a ring shape as a whole, The opening is the same as that of the conventional example 1 except that a hole having a step in the up-and-down direction as shown in Fig. 7 is formed and then a method of bonding and fixing the pin with the pin having a similar structure, The technology and the surprise. Therefore, the description of the components corresponding to the yoke 2, the tooth 3, the groove 5, and the protrusion 6 in the conventional art will be omitted, and the shape of the hinge, Only the details will be explained.

FIG. 7 is a view showing a concept of a pinching method of an annularly retaining type motor stator capable of concentrically fastening according to an embodiment of the present disclosure; and FIG. 8 is a perspective view of a concentric fastening type motor stator according to an embodiment of the present disclosure, Fig. 9 is a view showing an example in which the shape of the stator shown in Fig. 8 is modified so as to incorporate a fastening method by pin engagement, and Fig. 10 is a cross- Fig. 3 is a view showing an example of a fastening method by mutual engagement of motor stator by deforming a part of the stator shown in a pin shape. Fig.

7 to 10, the annularly retaining type motor stator capable of concentrically fastening according to the embodiment of the present disclosure includes a plurality of divided stator stators, To an annular retaining type motor stator capable of concentrically fastening the stator easily and easily.

The annularly-retaining-type motor stator 100 according to the present disclosure has a structure including a stator 100 and a pin 200. The annular-

 The stator 100 is provided with an approximately "T" -shaped split phase which is connected in an annular fashion by interconnecting the ends.

As shown in FIGS. 7 and 8, the stator 100 of the present disclosure has stator 100 having split heights at different heights to maintain a constant height and to be fastened in an annular shape A step of deforming is formed. In other words, an end of the stator 100 protruding outward is formed. One end forms an end on the upper side of the center line in the height direction, and the other end forms an end on the lower side in the center line in the height direction. do. In this way, when the stator 100 is fastened between the divided stator 100, the lower end surface and the lower end upper surface of the stator 100 are opposed to each other so that the stator 100 can be continuously arranged. 200 are passed through and can be fastened.

The stator 100 of the present disclosure has a configuration in which the ends of the molds formed with the opposite ends turned upside down or both ends of the mold are inverted at a predetermined height And is fastened in an annular shape. That is, as shown in FIG. 8, the stator 100 may be fixed in an annular shape by being held at a constant height by using the ends of the molds whose both ends are inverted upside down. The stator 100 can be fastened in an annular shape while maintaining a constant height by changing the shape of the step as in the case of a shape having an unformed end having a receiving groove. 8 is an inverted symmetrical shape in the up and down direction, but it may have an asymmetric shape biased upward or downward, and the end of the deformed shape shown in FIG. 9 may have one protrusion and one receiving groove But it may have a shape in which a plurality of projections and receiving grooves are formed. It is most preferable that the stator 100 as described above is fastened through the fin 200 passing through the connection portion. However, as shown in FIG. 10, the end of the stator 100 is formed with the end protruding outwardly One end of which is formed on the upper side of the center line of the height direction and the other end of which is connected to the selected one of both ends of the stator 100 of Fig. And the fitting protrusion 120 is inserted into the fitting groove 110 after the fitting protrusion 120 is formed in the other fitting hole 120 so that the fitting protrusion 120 is fastened to the fitting groove 110, And the like can be used.

As shown in FIGS. 8 and 9, the pin 200 is formed in a cylindrical shape in cross section, and penetrates the end connecting portion of the stator 100 to maintain the stator 100 in an annular shape.

Here, FIG. 11 is a view showing a modification of the pin shape of the fastening method of the present disclosure shown in FIGS. 8 to 10, and FIG. 12 is a view showing a modification of the pin shown in FIGS. Fig. 13 is an example in which the motor stator is fastened by a screw fastening method by a screw coupling method, Fig. 13 is an enlarged cross-sectional view It is an example to be concluded.

It is also possible that a cut surface 202 for restraining the lateral flow of the stator 100 is formed on the side (outer circumferential surface) of the fin 200 of the present disclosure. 8 is formed on the side surface of the pin 200 of the present disclosure as described above, it is in the form of a polygonal cross section having a polygonal cross section, whereby the stator 100 May be interfered with, so that the lateral flow of the stator 100 is restrained. The stator 100 can be more firmly fastened by the fins 200 and at the same time the annular holding can be made easier. Here, the cross-section 202 of the present disclosure is shown with an octagonal cross-section, but may have triangular, square, pentagonal or more polygons in various forms.

12, a thread 210 for fastening with the stator 100 may be formed at a predetermined position on the outer circumferential surface of the pin 200 of the present disclosure. This thread 210 allows bolt engagement so that the pin 200 inserted through the stator 100 is released and the coupling force between the pin 200 and the stator 100 is maintained. 12, a thread 210 is formed on the outer circumferential surface of the fin 200 of the present disclosure and a head 212 is formed on the end of the fin 200. The threaded portion 210 is screwed into the corresponding stator 100 It is preferable that the trench 220 is formed. At this time, it is preferable that a groove is formed in the head 212 for inserting a tool such as a screw for rotating the pin 200 to be fastened to the stator 100, thereby enabling both fastening and detachment. The thread 210 of the present disclosure is shown to be formed only at one end of the fin 200 so as to correspond to one stator 100 as shown in Fig. 12, but only the stator 100 Or may be formed in a variety of ways such that the positions thereof are formed on the inner side of the coupling portion between the stator 100, or the like.

13, it is also possible to form a ring 214 instead of the head 212 at the end of the pin 200 of the present disclosure. In this case, the stator 100 shown in FIGS. 8 to 10 can be attached Thereby facilitating the separation by the fused pin 200 coupling. Of course, it is also possible to form the ring 214 on the fin 200 having the cut surface 202 as shown in FIG. 11, and also to fit the pin 200 having the thread 210 as shown in FIG. Of course.

Fig. 14 is a view showing an example in which a fastening method of a motor stator incorporating a pinning method in a longitudinal direction shown in Figs. 8 to 13 is grafted in a transverse direction; Fig.

The coupling between the stator 100 and the pin 200 according to the present invention is such that the pins 200 are coupled in the longitudinal direction. .

For this, the pin 200 of the present disclosure has a shape of a band with a predetermined width rather than a shape of a bar, with both ends of the pin 200 forming an inwardly bent latching end 204, So that they can be engaged with each other. At this time, it is preferable that a part or all of a predetermined position in the longitudinal direction has an elastic force so that each end can be easily pulled when it is engaged. The engagement of the stator 100 using the band-shaped pins 200 according to the above is performed by connecting all of the stator 100 and holding the ends of the pins 200, . On the other hand, when the stator 100 is detached, the stator 100 may be pulled upward (downward) so that the engaging ends 204 slide in opposite directions.

As described above, the annular-type retaining-type motor stator capable of concentrically fastening can be engaged in an annular holding state when assembling a stator for divisional stator, thereby facilitating the concentric tightening of the stator and separating it easily, So that the assembling process is difficult and the problem of the prior art that the respective stator is difficult to be disassembled in the process of disassembling or maintenance is solved and the concentricity of the stator is distorted after the coupling is completed, Noise and vibration generated by the increase of the cogging torque are not generated and a separate process such as injection, welding, and sawing is not required, unnecessary loss such as production, operation, cost and time is not generated, And efficiency comparable to that of the cylindrical type stator are satisfied, The has the advantage that the performance of the motor efficiency is improved over.

It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It is not limited to the embodiment.

100: stator 110: fitting groove
120: insertion protrusion 200: pin
202: cutting plane 204:
210: threads 212: head
214: ring 220: screw groove

Claims (1)

A stator 100 of segmented shape which is connected in an annular fashion by interconnecting the ends thereof; And
And a pin (200) penetrating the end connecting portion of the stator (100) to maintain the stator in an annular shape,
At both ends of the stator 100, the split stator is maintained at a constant height and formed with an annular step having different heights to be fastened in an annular shape and each projecting outwardly, An end is formed on the upper side of the center line of the direction and the other end is formed on the lower side of the center line in the height direction,
The stator 100 is maintained at a constant height by using one of the ends of the molds formed with the opposite ends turned upside down or both ends of the molds formed by the molds having the protrusions and the grooves receiving the protrusions, Respectively,
The pin 200 has a band shape having a predetermined width instead of a shape of a bar, and both ends of the pin 200 are formed with an inwardly bent hooking end 204 so that the respective ends can be engaged with each other ,
A part or all of a predetermined position in the longitudinal direction is formed to have an elastic force so that the respective ends can be easily pulled when engaged,
The engagement with the stator 100 using the band-shaped pin 200 is performed by connecting all of the stator 100 and grasping the respective ends of the pin 200 and applying an external force, And the stator (100) is tightly fixed by the pin (200) so that the stator (100) is annularly retained.

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