KR20180108232A - Segment core jointing manufacturing method - Google Patents

Abstract

The present invention relates to a method of assembling a segment stator core to assemble a plurality of arc-shaped segment cores in a form that a tooth unit having a coil wound inside an arc-shaped yoke unit is assembled into one circle-shaped stator core. The method comprises: a winding step of winding a coil on a tooth unit of arc-shaped segment cores; a coupling step of coupling the arc-shaped cores in which the coil is wound using a support jig, an inner jig, and a tightening band in a circle shape; an adhering step of adhering each arc-shaped segment core attachment portion of the stator cores coupled in a circle shape so that the stator core can continue to maintain an accurate circular state; and a separating step of separating the finished stator core from the support jig and the inner jig and separating the tightening band from the stator core. Accordingly, the segment cores are combined into an accurate circular stator core and the segment cores can be inserted into a housing in a state that a combination state of the segment cores is stably maintained.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of assembling a split stator core,

More particularly, the present invention relates to a method of assembling a divided stator core, more specifically, assembling a plurality of divided cores into one precise circular stator core through a receiving jig, an inner jig and a tightening band, And to be able to be inserted into the housing while keeping it.

In general, motors used in green cars such as hybrid cars, electric vehicles and plug-in hybrids require a high-speed, high-power output, so synchronous motors (PMSM) using split cores capable of alignment winding are used. A stator, a housing, and a shaft.

In addition, a motor in which divided cores are applied to a driving system in which compactness and light weight are indispensable in the whole industry including a green car is widely applied.

However, in the manufacturing method of joining the divided cores at present, most of the cores are fused by heat to bond them together, so that an eddy current is generated during driving the motor.

The eddy currents appear as heat loss, and there is a problem that motor efficiency is reduced due to such heat generation.

In addition, the speed of the motor is continuously increasing for miniaturization, and the eddy current loss is increased accordingly, so that the eddy current reduction measures are required

The following Patent Document 1 discloses a split-core type motor stator that is easy to assemble and disassemble.

The split core motor stator of Patent Document 1 has a yoke portion having an outer circumferential surface in an arc shape, a tooth portion protruding from the inner circumferential surface of the yoke portion to wind the coil, an extending protrusion portion projecting in the circumferential direction of the yoke portion at both end surfaces of the yoke portion, A first divided core including an engaging projection protruding in a radial direction of a yoke portion in an inner peripheral surface of a protrusion; a yoke portion having an outer circumferential surface in an arc shape; a tooth portion protruding from the inner circumferential surface of the yoke portion to wind the coil; And a second divided core including a recessed portion recessed in a shape corresponding to the extending projection portion and a coupling groove formed in the depression portion in a shape corresponding to the coupling projection, Are alternately connected and assembled so as to be fitted into the coupling grooves.

Korean Registered Patent No. 10-0964540 (registered on August 10, 2010)

When a plurality of arcuate cores each having an engaging projection and an engaging groove are coupled to one circular stator core as in Patent Document 1, when the neighboring arcuate cores are not welded or adhered to each other, Can not be maintained.

Conventionally, there have been many cases where a plurality of arc-shaped cores are combined with one circular stator core by using an assembling jig, and then welded portions of arc-shaped divided cores are welded.

However, when a plurality of arc-shaped cores are combined with a single circular stator core and the arc-type divided cores are welded to keep the stator core in a circular state, there is a problem that workability is deteriorated and cost is increased, There is a problem that an eddy current loss occurs on the welded portion as described above, thereby adversely affecting the motor performance.

The object of the present invention is to solve the problems of the conventional method of assembling a stator core according to the related art, and it is an object of the present invention to make it possible to assemble a plurality of arcuate cores into one circular stator core, So that the stator core can be maintained at a relatively low cost.

Another object of the present invention is to make it possible to facilitate the separation of the fastening band by preventing the fastening band connecting the arc-shaped core to the circular stator core from adhering to the stator core during the bonding process, So as to prevent the state from being changed or disturbed.

According to an aspect of the present invention, there is provided a method of assembling a split stator core, including: splitting a plurality of arc-shaped split cores into a single circular stator core in which a tooth is provided inside a arc- A stator core assembly method comprising: a winding step of winding a coil on a tooth portion of an arc-shaped divided core; A coupling step of circularly coupling a plurality of arc-shaped cores in which the coils are wound using the support jig, the inner jig, and the tightening band; A bonding step of adhering each arc-shaped divided core attaching portion of the circularly coupled stator core so that the stator core can maintain the accurate circular state; And separating the completed stator core from the receiving jig and the inner jig and separating the fastening band from the stator core.

The supporting jig used in the assembling step of the divided stator core assembling method according to the present invention is characterized in that a supporting jig for supporting the lower end of the yoke portion of the arc-shaped divided core is provided at the upper end of the inner peripheral surface, And the cylindrical inner jig provided at the center of the inner side of the receiving jig is provided with a fitting portion to be inserted into the inner jig insertion hole of the receiving jig at the lower end.

The fastening band used in the step of assembling the divided stator core according to the present invention may be formed by tightening the yoke portion of each arc-shaped core to the inner jig side so that the side surface of the yoke portion of each arcuate core is closely contacted with the side surface of the yoke portion of the adjacent arc- And a Teflon coating layer is formed on the outer surface so that the inner circumferential surface of the tooth portion of each arc-shaped split core and the outer circumferential surface of the yoke portion are arranged on a concentric circle.

The fastening band used in the step of assembling the divided stator core according to the present invention is characterized in that a plurality of wormhole connection holes are formed at regular intervals on the surface of the tightening side and a tightening mechanism using a worm is mounted on the fixed end .

The method of assembling a split stator core according to the present invention is characterized in that at least one fastening band is used in the coupling step and a joint portion is provided at the upper and lower portions of each tightening band of the stator core which is circularly coupled.

The step of adhering the divided stator core assembly according to the present invention is characterized in that an adhesive is applied to the contact portions of the arc-shaped cores among the exposed portions provided on the upper and lower sides of the tightening band.

According to the method of assembling a divided stator core according to the present invention, a plurality of divided cores can be coupled to an accurate circular stator core, and the stator core can be inserted into the housing in a stable state while maintaining a stable state. And can greatly contribute to the performance improvement of the motor.

According to the method of assembling the divided stator core according to the present invention, since the fastening bands in which the Teflon coating layer is formed on the outer surface in the process of joining the plurality of divided cores do not adhere to the divided cores, the fastening bands can be easily separated in the separation step, There is no fear that the split core will flow during the separation process of the fastening band and the circular assembled state will not be disturbed or fluctuated.

1 is a plan view of a divided core assembled through a method of assembling a divided stator core according to a preferred embodiment of the present invention;
2 is a partially exploded perspective view of the stator core to which the divided cores are applied,
3 is a process flow diagram of a method of assembling a divided stator core according to a preferred embodiment of the present invention,
FIG. 4 is an exploded perspective view of a supporting jig and an inner jig used in the assembling step of the divided stator core assembling method according to the preferred embodiment of the present invention,
5 is a longitudinal sectional view of the coupled state of the dynamic holding jig and the inner jig,
FIG. 6 is a perspective view of a fastening band used in a step of assembling a split stator core according to a preferred embodiment of the present invention, FIG.
Fig. 7 is a photograph of a state before tightening each divided core with a tightening band,
8 is a photograph of a state in which each divided core is joined with a tightening band.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method of assembling a stator core according to a preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

In the following, the terms "upward", "downward", "forward" and "rearward" and other directional terms are defined with reference to the states shown in the drawings.

FIG. 1 is a plan view of a divided core assembled through a divided stator core assembling method according to a preferred embodiment of the present invention, and FIG. 2 is a partially exploded perspective view of a stator core to which the divided core is applied.

1, the divided core 110 assembled through the method of assembling the divided stator core according to the preferred embodiment of the present invention has a shape in which a tooth portion 112 for winding a coil is provided inside the arc-shaped yoke 111 I have.

After the coil winding, the split core 110 is assembled into a circular stator core 100 as shown in FIG. 2 and inserted into the motor housing.

3 is a process flow diagram of a method of assembling a split stator core according to a preferred embodiment of the present invention.

A method of assembling a divided stator core according to a preferred embodiment of the present invention is a method of assembling a plurality of arc-shaped cores 110 into a circular stator core 100 so as to be inserted into a motor housing, Step, and a separation step.

The winding step is a step of winding the coil on the tooth portion 112 of the arc-shaped divided core 110.

Since the split core 110 assembled through the method of assembling the divided stator core according to the preferred embodiment of the present invention has the tooth portion 112 provided inside the arc-shaped yoke 111, the coil winding becomes very easy, A relatively large amount of coils can be wound on the tooth portion 112, and the performance of the motor can be improved because the coil space factor is large.

In addition, when the split core 110 is used, it is not necessary to replace the entire stator core when a defect occurs in the stator core, and only the split core 110 of the defective portion can be replaced.

The coupling step is a step of circularly coupling a plurality of arc-shaped cores 110 in which the coils are wound.

FIG. 4 is an exploded perspective view of a supporting jig and an inner jig used in the assembling step of the divided stator core assembling method according to the preferred embodiment of the present invention, and FIG. 5 is a longitudinal sectional view of the coupled state of the coin receiving jig and the inner jig.

In the coupling step, the arc-shaped divided cores 110 are circularly coupled using the receiving jig 120 and the inner jig 130, and the circularly coupled state is maintained through the tightening band 140.

4 and 5, the receiving jig 120 is in the form of a cylindrical container having an open top and a closed bottom.

The upper end of the inner peripheral surface of the receiving jig 120 is provided with a receiving jaw 121 for supporting the lower end of the yoke 111 of the arc shaped divided core 110 and an inner jig receiving hole 122 is formed at the lower inner center.

The inner jig 130 is cylindrical, and is installed at the center of the inside of the receiving jig 120.

The lower end of the inner jig 130 is provided with a fitting portion 131 to be inserted into the inner jig fitting hole 122 of the receiving jig 120.

When the plurality of arcuate cores 110 are circularly joined in the coupling step, the lower ends of the yoke portions 111 of the arc-shaped divided cores 110 are placed on the receiving jaws 121 of the receiving jig 120, Is brought into contact with the outer peripheral surface of the inner jig 130.

The engaging protrusion 111a formed on one side of the yoke portion 111 of the arc-shaped core 110 is inserted into the engaging groove 11b formed on the other side of the adjacent arcuate core 110, So that one side of the divided core 110 is brought into contact with the other side of the adjacent arc-shaped core 110.

After the plurality of arcuate cores 110 are circularly coupled, the yoke portion 111 of each arc-shaped core 110 is tightened toward the inner jig 130 through the tightening bands 140, The side surface of the yoke portion 111 is brought into intimate contact with the side surface of the yoke portion 111 of the neighboring arc-shaped divided cores 110 and the inner peripheral surface of the tooth portion 112 of each arc- So that the outer circumferential surfaces of the outer circumferential surface 111 are arranged on a concentric circle.

6 is a perspective view of a fastening band used in the engaging step of the method of assembling a split stator core according to a preferred embodiment of the present invention.

As shown in FIG. 6, the tightening band 140 has a plurality of wormhole connection holes 141 formed at regular intervals on the surface of the tightening side, and a tightening mechanism 143 using a worm 142 is mounted on the fixed end. Can be used.

When the wormhole 142 of the tightening mechanism 143 is rotated in one direction by using a rotating tool, a tightening band 140 of this type is pulled toward the fixed end and the diameter of the wormhole 142 is reduced. When the worm 142 is rotated in the other direction, the tightening side is released toward the opposite side of the fixed end, and the diameter is enlarged.

Fig. 7 is a photograph of a state before each split core is tightened with a tightening band, and Fig. 8 is a photograph of each split core being joined with a tightening band.

One or more tightening bands 140 are used, and the number of use of the tightening bands 140 is determined along the vertical height of the stator core 100.

That is, if the height of the stator core 100 is high, a large number of fastening bands 140 are used. If the height of the stator core 100 is low, a small number of fastening bands 140 are used.

However, the stator core 100 is required to be provided with a portion that can be connected to the upper portion and the lower portion of each tightening band 140.

The tightening band 140 uses a Teflon-coated outer surface.

Teflon forms a very stable compound due to its strong chemical bond between fluorine and carbon, so it has nearly complete chemical inertness and heat resistance, non-tackiness, excellent insulation stability and low coefficient of friction.

In other words, almost all materials do not adhere to Teflon, and Teflon coated parts are most easily separated even when they come into contact with highly sticky materials.

In general, the Teflon coating thickness for non-tackiness and abrasion resistance is known to be 20 탆 to 80 탆.

The bonding step is a step of bonding the arc-shaped divided cores 110 of the stator core 100 arranged in an accurate circle through the tightening bands 140 so that the stator core 100 can keep the accurate circular state .

In the bonding step, an adhesive is applied to the contact portions of the arc-shaped divided cores 110 among the exposed portions provided at the upper and lower portions of the tightening band 140.

For example, when two fastening bands 140 are used, the upper fastening band 140 and the lower fastening band 140 of the tight fitting portion of the pair of arc-shaped cores 110, The adhesive is applied to the lower portions of the lower fastening band 140.

If the adhesive is cured in the bonding step, even if the fastening band 140 is removed, the arc-shaped divided cores 110 and the neighboring arc-shaped divided cores 110 are not bonded to each other, .

The separating step is a step of separating the stator core 100 coupled in an accurate circle from the supporting jig 120 and the inner jig 130.

The separating step separates the stator core 100 from the stator core 100 by unfastening the fastening band 140 before or after separating the stator core 100 from the receiving jig 120 and the internal jig 130. [

The fastening band 140 used in the joining step and the bonding step of the divided stator core assembling method according to the preferred embodiment of the present invention is not adhered to the stator core 100 because the outer surface is coated with Teflon, So that it is easily separated from the stator core 100 in the separating step.

As described above, in the method of assembling the divided stator core according to the preferred embodiment of the present invention, a plurality of wound arc-shaped cores 110 are wound in one precise circular shape through the receiving jig 120 and the inner jig 130, The stator core 100 can be stably held in the stator core 100 by bonding the annular cores 110 to each other.

Further, the use of the Teflon coated fastening band 140 facilitates separation of the fastening band 140, and the circular state of the stator core 100 is not changed or disturbed in the process of separating the fastening band 140 .

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

100: stator core
110: split core
111: yoke part
112:
120: Support jig
130: Inner jig
140: Fastening band

Claims (6)

A divided stator core assembly method for assembling a plurality of arcuate cores (110) having a shape in which a tooth portion (112) for winding a coil is provided inside an arcuate yoke portion (111) with one circular stator core (100)
A winding step of winding the coil on the tooth portion 112 of the arc-shaped core 110;
A coupling step of circularly coupling a plurality of arc-shaped cores (110) wound with coils using the support jig (120), the inner jig (130) and the tightening band (140);
A bonding step of bonding the arc-shaped divided cores (110) of the circularly coupled stator core (100) so that the stator core (100) can maintain the accurate circular state;
And a separating step of separating the completed stator core (100) from the receiving jig (120) and the inner jig (130) and separating the tightening band (140) from the stator core (100) Assembly method. The method according to claim 1,
The supporting jig 120 used in the coupling step is provided with a supporting step 121 for supporting the lower end of the yoke part 111 of the arc-shaped divided core 110 at the upper end of the inner peripheral surface, Is formed, and in this case,
The cylindrical inner jig 130 provided at the center of the inner side of the receiving jig 120 is characterized in that the lower end of the cylindrical inner jig 130 is provided with a fitting portion 131 to be inserted into the inner jig fitting hole 122 of the receiving jig 120 A method of assembling a split stator core. 3. The method according to claim 1 or 2,
The fastening band 140 is formed by tightening the yoke portion 111 of each arcuate core 110 to the inner jig 130 so that the side of the yoke portion 111 of each arc- The inner peripheral surface of the tooth portion 112 of each arc-shaped divided core 110 and the outer peripheral surface of the yoke portion 111 are arranged concentrically with each other on the circumference of the yoke portion 111, And a Teflon coating layer is formed on the surface of the core. The method of claim 3,
The tightening band (140) is characterized in that a plurality of wormhole connection holes (141) are formed at regular intervals on the surface of the tightening side and a tightening mechanism (143) using a worm A method of assembling a stator core. The method of claim 3,
Wherein at least one of the fastening bands (140) is used in the joining step, and joining portions are provided at the upper and lower portions of each tightening band (140) of the circularly coupled stator core (100). 6. The method of claim 5,
Wherein an adhesive is applied to a contact portion of each arc-shaped core (110) among the exposed portions provided at the upper and lower portions of the tightening band (140) in the bonding step.

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