KR101668182B1 - Method for assembling rotator of motor - Google Patents

Abstract

The present invention can be easily assembled and used by assembling the rotors by sandwiching the shaft and the core each having the insulating layer formed therebetween so that they are structured so as not to be electrically communicated between the core and the rotor and the housing through the double insulation effect, And the rotor can be insulated from the rotor.
In addition, the present invention can be configured such that a core is inserted into a shaft having a first insulating layer formed on its surface, and then a second insulating layer can be formed on both sides of the core in various ways, And the rotor can be safely used without any safety accidents such as electric shock.
Particularly, the present invention is characterized in that insert protrusions are formed on the surface of the shaft in the longitudinal direction so that the first insulating layer can be firmly formed on the shaft, and the first insulating layer and the core can be engaged with each other in a concavo- The present invention also provides a method for assembling a rotor of a motor in which a coupling force between a shaft and a core is increased to stably assemble and use the rotor.

Description

Technical Field [0001] The present invention relates to a method of assembling a rotor of a motor,

The present invention relates to a method of assembling a rotor of a motor, and more particularly, to a method of assembling a rotor of a motor, more specifically, So that they can be integrally assembled and used.

The motor is configured so that the rotor rotates within the stator mounted inside the housing. At this time, an armature winding is wound around the rotor or a permanent magnet is used to obtain reaction force. Such a rotor is manufactured variously as shown in the following patent documents 1 to 3.

Patent Document 1 relates to a rotor of a motor that can increase the rigidity of a motor by enhancing a coupling force between a ring magnet and a resin, and includes a ring magnet having an insertion hole penetrating a center portion thereof; A shaft inserted into the insertion hole; And a resin that is disposed between the insertion hole and the shaft and fixes the ring magnet and the shaft, and the resin extends to the upper and lower surfaces of the ring magnet to cover at least a part of the ring magnet upper and lower surfaces.

Patent Document 2 relates to a rotor structure of a BLDC motor in which a plurality of magnet insertion grooves and a magnet cage having a magnet gap retaining piece are bonded to the inner circumferential surface of a circumferential portion of a rotating body constituting a rotor and a plurality of magnets are bonded to a plurality of magnets Since the magnet is inserted into the insertion groove, it is possible to easily combine a plurality of magnets without using a separate jig, and productivity is improved. Both side surfaces of the magnet gap retaining piece of the magnet cage are formed as normal surfaces facing the rotation center of the rotor, The magnet inserted into the insertion groove does not deviate from the normal direction and thus the engaging operation of the magnet is made simpler and the rotating body having the circumferential portion and the disk portion is formed by press working the metal plate, And the shaft fixing member is inserted and fixed to the formed boss portion Times with periphery and the disk portion and the boss portion is full it is possible to reduce equipment and tooling costs by forming a metal plate to press working, and only the shaft holding member formed by die casting.

Patent Document 3 relates to a stator or rotor of an electric motor or a generator, and is formed of a core formed of a ferromagnetic material having a plurality of teeth arranged in a circumferential direction with respect to an axis, and at least one holding member has at least two tooth ends Are connected to each other in such a manner as to suppress the relative movement of the tooth end portions. By suppressing the relative movement between the tooth ends, the vibration is reduced. Vibration can also be reduced by welding the inner surfaces of the cores together. Reducing vibration reduces noise generated during operation of the rotor or stator.

However, these conventional rotators have the following problems.

(1) The core is used to wind the armature winding in the rotor, and this core may serve as an iron core, causing electric shock when using the motor in contact with the shaft supporting the core.

(2) That is, both the shaft for rotatably supporting the rotor are rotatably mounted on the housing, so that the power applied to the armature winding provided on the core mounted on the shaft is electrically connected . Therefore, if the housing is improperly touched or insulated, it may cause electric shock.

(3) In order to solve this problem, insulating treatment such as insulator assembly, powder coating, and insert molding is performed between the shaft and the core, which causes the following problems.

(4) The insulator assembly is a method of inserting two parts injected with a nylon type synthetic resin by inserting them on both sides of the shaft, and inserting insulating paper (or PE film) into the slots of the core wound around the actual armature coil. This is because the insulator inserted on both sides of the shaft and the insulating paper inserted in the slot must be manufactured separately and then assembled to the rotor, so that each component must be assembled and assembled again, which is cumbersome to manufacture and assemble.

(5) Powder coating (Epoxy Powder Coating) is epoxy type powder with excellent heat resistance, and it is a method to paint both ends of the shaft equipped with slots and cores. However, this method has difficulties in painting since the core must be partially powder coated with the core mounted on the shaft.

(6) Insert molding refers to a method of directly injecting a core and a shaft assembly into a mold. However, in the case of this method, since each of the molds must be manufactured according to the size of the motor and the external shape, a high level of mold technology is required.

(7) Therefore, there is a need for a method of improving the insulation performance while easily manufacturing the rotor.

Korean Registered Patent No. 1461596 (Registered on April 11, 2014) Korean Registered Patent No. 1471367 (Registered on December 4, 2014) Korean Registered Patent No. 1483348 (Registered Date: 2015.01.09)

The present invention has been made in view of the above points, and it is an object of the present invention to provide a rotor and a rotor that can be easily assembled and used by assembling a rotor and a shaft, And the rotor can be stably insulated from the rotor. The present invention is directed to a method of assembling a rotor of a motor.

In addition, the present invention can be configured such that a core is inserted into a shaft having a first insulating layer formed on its surface, and then a second insulating layer can be formed on both sides of the core in various ways, And the rotor can be safely used without any safety accidents such as electric shock.

Particularly, the present invention is characterized in that insert protrusions are formed on the surface of the shaft in the longitudinal direction so that the first insulating layer can be firmly formed on the shaft, and the first insulating layer and the core can be engaged with each other in a concavo- The present invention also provides a method for assembling a rotor of a motor in which a coupling force between a shaft and a core is increased to stably assemble and use the rotor.

In order to achieve the above object, a method of assembling a rotor of a motor according to a first embodiment of the present invention includes a first step (S10) of forming a first insulating layer (110) on a surface of a shaft (100); A second step (S20) of forming a core (200) integrally formed by stacking a predetermined number of core plates and forming a second insulating layer (210) on both sides of the core (200); And a third step (S30) of sandwiching the shaft (100) through the core (200) and assembling the second insulating layer (210) so as to fit on the first insulating layer (110) The insulating layer 110 is formed on the shaft 100 and is then cut and polished to an outer diameter so that the first insulating layer 110 can be firmly coupled to the outer surface of the shaft 100 A plurality of coupling grooves 220 are formed at predetermined intervals on the inner circumferential surface of a mounting hole for inserting the shaft 100 into the core 200 And the first insulating layer 110 is formed to engage with the coupling groove 220.

A method of assembling a rotor of a motor according to a second embodiment of the present invention includes a first step S10 'of forming a first insulating layer 110 on a surface of a shaft 100; A second step (S20 ') of stacking a predetermined number of core plates to form a core (200) integrally; A third step (S30 ') of assembling the shaft (100) through the core (200); And a fourth step (S40 ') of forming a second insulating layer (210) on both sides of the core (200) and forming an inner rim of the core (200) in contact with the first insulating layer (110) The first insulating layer 110 is formed on the shaft 100 and is then cut and polished to an outer diameter so that the first insulating layer 110 is formed on the outer surface of the shaft 100, A plurality of coupling grooves 220 are formed at predetermined intervals on the inner circumferential surface of a mounting hole for inserting the shaft 100 into the core 200, And the first insulating layer 110 is formed to engage with the coupling groove 220.

In particular, the first insulating layer 110 is formed of a phenol resin.

The second insulating layer 210 is formed by inserting a separately manufactured insulator into the shaft 100 and assembling the insulator in contact with the core 200, by insert molding, or by powder coating.

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The rotor assembly method of the motor according to the present invention has the following effects.

(1) Since the insulation effect between the rotor and the rotor can be expected only by cooking the shaft and the core, productivity can be improved by increasing the assembly efficiency.

(2) Especially, the first insulating layer formed on the shaft is made of phenol resin to increase the insulating effect, so that it can be applied to motors requiring high insulation performance such as universal motors and large motors.

(3) Since the insert protrusion is formed on the shaft and the first insulating layer is formed on the shaft, the coupling force between the shaft and the first insulating layer is increased, and the shaft and the core can be stably coupled.

(4) Since the first insulating layer and the core can be engaged with each other, the shaft and the core can be coupled more stably so that the rotor can be rotated safely.

(5) Since the second insulating layer, which is formed on both surfaces of the core, can be formed by various methods, an insulating layer can be formed by selecting a method suitable for the insulating properties depending on the size and performance of the motor.

(6) The electrical contact between the core and the shaft can be cut off by inserting both of the core and the connecting portion where the electrically conductive core can contact the shaft, so that even if the shaft comes into contact with the motor housing, It is possible to eliminate the occurrence of safety accidents.

1 is a flowchart for explaining a rotor assembly method of a motor according to a first embodiment of the present invention;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rotor assembly for a motor,
3 is a cross-sectional view of one example for showing the coupling state of the rotor according to the first embodiment of the present invention.
FIG. 4 is a cross-sectional view of another example for showing a coupled state of the rotor according to the second embodiment of the present invention. FIG.
5 is a flowchart for explaining a method of assembling a rotor of a motor according to a second embodiment of the present invention.
6 is a view for sequentially showing a method of assembling a rotor of a motor according to a second embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should properly define the concept of the term to describe its invention in the best possible way The present invention should be construed in accordance with the spirit and scope of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Thus, various equivalents And variations may be present.

1 to 4, a method of assembling a rotor of a motor according to a first embodiment of the present invention includes the steps of forming a first insulating layer 110 on a surface of a shaft 100, stacking a plurality of sheets, A second insulating layer 210 is formed on both sides of the core 200 and then the shaft 100 is inserted into the center of the core 200 and assembled together.

Particularly, according to the present invention, since the shaft 100 and the first insulating layer 110, and the first insulating layer 110 and the core 200 can be engaged with each other, So that the coupling force between the shaft 100 and the core 200 can be increased.

Hereinafter, this configuration will be described in more detail as follows.

The first step S10 is a step of forming a first insulating layer 110 on the surface of the shaft 100 as shown in Figs. At this time, the shaft 100 is usually mounted on the housing so as to be rotatably supported by a bearing or the like, and is manufactured by a conventional technique used in the technical field to which the motor belongs.

Particularly, the first insulating layer 110 is for insulating between the shaft 100 and a core 200 described later, as shown in FIG. 2 (a). It is preferable that the first insulating layer 110 is formed to be slightly longer than the core 200.

In the preferred embodiment of the present invention, the first insulating layer 110 may be formed of any material capable of electrically insulating. Among them, it is most preferable to use a phenol resin which is known to have excellent electrical insulation and weather resistance.

Also, in a preferred embodiment of the present invention, it is preferable that the first insulating layer 110 is formed on the shaft 100 and then post-processed. In this post-processing, the first insulating layer 110 is cut into a predetermined outer diameter so that the first insulating layer 110 can be fitted into the core 200 as shown on the right side of FIG. 2 (a) And a step of polishing later.

3, the first insulating layer 110 and the core 200 may be formed so as to be able to be engaged with the core 200 to be described later. In this case, 200 so that the coupling force between the shaft 100 and the core 200 can be increased.

Lastly, as shown in FIG. 4, the shaft 100 preferably has a plurality of insert protrusions 120 formed at predetermined intervals on the outer circumferential surface thereof. The insert protrusions 120 are formed so that when the first insulating layer 110 is formed on the surface of the shaft 100, the first insulating layer 110 is sandwiched therebetween so that the first insulating layer 110 is engaged with the shaft 100, The bonding force between the first insulating layers 110 can be increased.

The second step S20 is a step of fabricating the core 200 and forming the second insulating layer 210 on both sides of the core 200, as shown in FIGS. 1 and 2B. Here, the core 200 is fabricated by a conventional technique, in which a plurality of core plates (or cores) are overlapped and the armature coils are wound on the outer circumferential surface. 3 and 4, the core plate 200 is generally formed in the shape of a disk, and has a mounting hole for fitting the shaft 100 at the center thereof. The core plate 200 has an armature coil So that a slot can be formed. 3 and 4 illustrate an example in which six slots are formed on the outer circumferential surface.

3 and 4, the core 200 preferably has a plurality of coupling grooves 220 formed at predetermined intervals on the inner circumferential surface of the mounting hole for mounting the shaft 100. [ The engaging groove 220 can be engaged with the first insulating layer 110 formed on the surface of the shaft 100 as described above to increase the coupling force between the shaft 100 and the core 200 So as to firmly fix it so as not to turn around.

The core 200 thus formed has a shape similar to a cylindrical shape. At this time, the second insulating layer 210 is formed on both sides of the core 200, as shown in FIGS. 1 and 2 (b). It is preferable that the second insulating layer 210 is formed on both sides of the core 200 at this time. The second insulating layer 210 may be formed by any method as long as it can be used for motor insulation. However, for example, an insulator manufactured separately may be inserted into the shaft 100 so as to be in contact with the core 200, A molding method, a powder coating method, or the like.

The third step S30 is a step of inserting the shaft 100 through the core 200 and integrally fixing the shaft 100, as shown in Figs. 1, 2C to 4C. At this time, as the shaft 100 is inserted into the core 200, the first insulating layer 110 is positioned therebetween to perform insulation.

In the preferred embodiment of the present invention, it is preferable that the second insulating layer 210 is put on the first insulating layer 110 by inserting the shaft 100 into the core 200 as described above. This is to prevent the core 200 from being in electrical contact with the shaft 100 so as to prevent a safety accident such as a short circuit or an electric shock.

As described above, according to the present invention, it is possible to assemble the motor rotor easily and quickly over three steps, and in particular, through the double insulation layer, a reliable insulation effect between the shaft and the core can prevent safety accidents such as short- .

The rotor assembly method of the motor according to the second embodiment of the present invention is performed in four steps as shown in Figs. 5 and 6, but differs from the first embodiment in its operation and assembling procedure. Therefore, a detailed description thereof will be omitted and a brief explanation will be given through the assembly procedure.

The first step S10 'is a step of forming the first insulating layer 110 on the surface of the shaft 100 as shown in FIG. 5 and FIG. 6 (a) A detailed description thereof will be omitted.

The second step S20 'is a step of forming the core 200 as shown in FIG. 5 and FIG. 6 (b). The core 200 is formed by applying a conventional technique in which the above-mentioned core plate is formed in a cylindrical shape by overlapping a predetermined number of the core plates.

The third step S30 'is a step of inserting the shaft 100 into the core 200 as shown in Figs. 5 and 6 (c). This step is performed in the same manner as in Embodiment 1, so that detailed description thereof will be omitted here.

The fourth step S40 'is a step of forming the second insulating layer 210 on both sides of the core 200 as shown in FIGS. 5 and 6 (d). This step is also performed in the same manner as in Embodiment 1, so that detailed description thereof is omitted here.

The present invention having such a structure can be used safely through a simple but double insulated structure.

100: Shaft
110: first insulating layer
120: insert projection
200: Core
210: second insulating layer
220: Coupling groove

Claims (7)

A first step (S10) of forming a first insulating layer (110) on the surface of the shaft (100); A second step (S20) of forming a core (200) integrally formed by stacking a predetermined number of core plates and forming a second insulating layer (210) on both sides of the core (200); And a third step (S30) of inserting the shaft (100) through the core (200) and assembling the second insulating layer (210) so as to fit on the first insulating layer (110)
The first insulating layer 110 is formed on the shaft 100 and is then cut to an outer diameter and polished,
The shaft 100 further includes insert projections 120 spaced at predetermined intervals in the longitudinal direction so as to firmly engage the first insulating layer 110 on the outer surface,
A plurality of coupling grooves 220 are formed at predetermined intervals on the inner circumferential surface of a mounting hole for inserting the shaft 100 into the core 200. The first insulating layer 110 is connected to the coupling grooves 220, Wherein the engaging portions are formed to be engaged with each other.
A first step (S10 ') of forming a first insulating layer (110) on the surface of the shaft (100); A second step (S20 ') of stacking a predetermined number of core plates to form a core (200) integrally; A third step (S30 ') of assembling the shaft (100) through the core (200); And a fourth step (S40 ') of forming a second insulating layer (210) on both sides of the core (200), wherein an inner rim portion is formed in contact with the first insulating layer (110)
The first insulating layer 110 is formed on the shaft 100 and is then cut to an outer diameter and polished,
The shaft 100 further includes insert projections 120 spaced at predetermined intervals in the longitudinal direction so as to firmly engage the first insulating layer 110 on the outer surface,
A plurality of coupling grooves 220 are formed at predetermined intervals on the inner circumferential surface of a mounting hole for inserting the shaft 100 into the core 200. The first insulating layer 110 is connected to the coupling grooves 220, Wherein the engaging portions are formed to be engaged with each other.
3. The method according to claim 1 or 2,
Wherein the first insulation layer (110) is made of phenolic resin.
delete 3. The method according to claim 1 or 2,
The second insulating layer 210 may be formed of,
A separately manufactured insulator may be inserted into the shaft 100 to be in contact with the core 200,
An insert molding method,
Wherein the powder coating is performed on the rotor.
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