JP2015080341A - Insulator, stator comprising the same, and motor comprising the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulator that has a higher output and a low cost, and to provide a stator comprising the same, and a motor comprising the same.SOLUTION: A motor insulator 7A, 7B comprises: a rotor Mr having a magnet 4 fixed to a rotation shaft 3; and a stator Ms having a tooth block coupling body 5 in which a plurality of tooth blocks 5c are arranged in an annular ring shape while intervening slots 5p, and which is configured by end plates 5a and 5b having a shape that substantially-identical shapes to the plurality of tooth blocks 5c arranged in the annular ring shape are coupled. The motor insulator comprises: radial drum parts 7ad and 7bd covering and insulating a wound part of each tooth block 5c, and around which a coil is wound; flange parts 7a6, 7at, 7b6, and 7bt covering the coil; cylinder parts 7a1 and 7b1 coupling the drum parts 7ad, 7bd in an annular ring shape; and projections 7a7 and 7b7 fitting on the slot 5p. The stator Ms is configured by fitting the insulators to the tooth block coupling bodies 5.

Description

  The present invention relates to an insulator used in an inner rotor type motor in which a rotor rotates inward of a stator, a stator including the same, and a motor including the same.

  Conventionally, an inner rotor type motor is often used as a drive source for office equipment, home appliances, and the like. For the inner rotor type motor, a motor with higher output (high efficiency) and lower price is required.

As countermeasures for this, for example, there are Patent Documents 1 and 2 as motors in which a stator is constituted by a split core.
Patent Document 1 has a configuration in which a plurality of divided cores are connected in an annular shape at one end on the inner peripheral side using second protrusions provided on upper and lower end plates.
Patent document 2 is a structure which prevents the damage of a coil | winding by forming a chamfer or a curved surface in the end plate of patent document 1.

JP 2009-268168 A JP 2009-273227 A

  By the way, in the above-mentioned prior art, it is supposed that the end plate uses a nonmagnetic material or a low magnetic material different from the electromagnetic steel plate constituting the tooth block of the split core. Therefore, when the teeth and the end plate are used in the same mold at the time of pressing, it is necessary to supply two kinds of materials, and it is necessary to provide a “second protrusion”, which makes the mold structure very It becomes complicated and causes cost increase.

  The above-described end plate disclosed in Patent Document 1 has a structure in which “second protrusions” are provided on the end plate, and the pitch accuracy between the magnetic poles (teeth) due to the provision of a large number of second protrusions. It is a structure that is difficult to produce. That is, since the second protrusion is inserted between the magnetic poles, a dimensional error during assembly affects the pitch accuracy between the magnetic poles.

  Further, since the gap (slot gap) into which the “second protrusion” fits depends on the size of the second protrusion of the end plate, a minimum thickness of 2 is necessary to provide the U-shaped protrusion. Since a gap more than double must be provided, and the gap becomes large, there is a case where the optimum design of the magnetic circuit cannot be performed.

  Further, in the tooth block coupling body in which the divided core is fixed only by the end plate, the stress (external force) at the time of press-fitting the teeth block coupling body into the outer ring body is easily distorted due to insufficient strength. Moreover, there is a risk of deformation due to magnet wire tension when winding the teeth block coupling body.

  If the teeth block connector is distorted, the roundness of the split cores forming the teeth block connector is lost. Therefore, the gap between the rotor magnet and the stator core is set to be wide to avoid a collision caused by a decrease in roundness, resulting in magnetic leakage, resulting in a decrease in magnetic efficiency, and as a motor. Resulting in lower output (efficiency). Further, if the pitch accuracy is deteriorated due to distortion of the teeth block coupling body, the smooth rotation of the rotor is affected, which may cause motor vibration and noise.

  On the other hand, when the split core is fixed with a mold, a molding die that performs integral molding is required, which increases the cost together with the molding operation. In addition, thin molding of the resin insulation part has many quality problems such as short shot (insufficient filling) and generation of burrs. Further, heat generation of the core / coil or the like when the motor is driven may cause deterioration of the core pitch accuracy due to deformation in the resin portion.

  The present invention has been made in view of the above problems, and the object of the present invention is to provide a higher output and lower price insulator, a stator including the same, and a motor including the same. It is.

  In order to solve the above problems, an insulator according to a first aspect of the present invention includes a rotor having a magnet fixed to a rotating shaft supported by a bearing, and a plurality of teeth blocks arranged in an annular shape with a slot in between. And a stator having a teeth block coupling body constituted by end plates having a shape in which substantially the same shape is coupled with the plurality of teeth blocks in which both end surfaces in the axial direction of the teeth block are arranged in an annular shape, A rotor for an inner rotor type motor whose rotor rotates in the stator, which is radially formed, covers and covers the wound portion of each tooth block, and a winding drum portion around which a coil is wound. A hook portion that covers the coil on the outer peripheral side, a cylindrical portion that connects the winding drum portion in an annular shape, and a protrusion that fits into the slot, Is fitted to the lock coupling body the stator is constituted.

  According to the first aspect of the present invention, the stator is configured by fitting the protrusion of the insulator into the slot of the tooth block coupling body and fitting the insulator to the tooth block coupling body, so that the assembly of the stator is easy. The cost can be kept lower than that of the conventional method. Moreover, since the protrusion of the insulator is fitted into the slot of the tooth block connector, the tooth block connector is reinforced.

The insulator according to the second aspect of the present invention is the insulator according to the first aspect of the present invention, wherein the protrusion is provided so as to protrude inwardly on the inner peripheral surface side of the extension connecting portion that connects the adjacent winding body portions. .
According to the second aspect of the present invention, since the protrusion is provided so as to protrude inwardly on the inner peripheral surface side of the extending connection portion that connects the adjacent winding body portions, the configuration of the insulator is simple.

The insulator according to a third aspect of the present invention is the insulator according to the first or second aspect of the present invention, wherein the protrusion is chamfered at a corner of a tip that contacts the teeth block coupling body when fitted into the slot. Has been.
According to the third aspect of the present invention, since the chamfer is formed at the corner of the tip that comes into contact with the teeth block coupling body when the projection is fitted into the slot, the projection can be smoothly fitted into the slot.

The insulator according to a fourth aspect of the present invention is the insulator according to any one of the first to third aspects of the present invention, wherein the protrusion has a strength to reinforce the tooth block coupling body with respect to the axial length of the slot. In addition, it has a predetermined length that can be fitted into the slot without hindrance.
According to the fourth aspect of the present invention, the protrusion has a strength to reinforce the teeth block coupling body with respect to the axial length of the slot, and has a predetermined length that can be fitted into the slot without any trouble. The teeth block coupling body can be reinforced, and the protrusions can be smoothly fitted into the slots, so that the workability is good.

A stator according to a fifth aspect of the present invention includes the insulator according to any one of the first to fourth aspects of the present invention, and the end plate is made of the same material as that of the electromagnetic steel sheet constituting the tooth block.
According to the fifth aspect of the present invention, since the end plate is made of the same material as that of the electromagnetic steel plate constituting the tooth block, the production equipment is simpler than the case where two types of materials are supplied, and the production cost is reduced. Inexpensive.

A stator according to a sixth aspect of the present invention includes the insulator according to any one of the first to fourth aspects of the present invention, and the end plate has the same thickness as the electromagnetic steel plate constituting the teeth block.
According to the sixth aspect of the present invention, since the end plate has the same thickness as that of the electromagnetic steel plate constituting the tooth block, the production equipment is simple and the production cost is low.

A stator according to a seventh aspect of the present invention includes the insulator according to any one of the first to fourth aspects of the present invention, and the end plate is formed of a substantially flat plate.
According to the seventh aspect of the present invention, since the end plate is constituted by a substantially flat plate, the production is easy as compared with the case where the second protrusion is provided, and the dimensional accuracy of the stator having the teeth block coupling body is high. .

The motor according to the eighth aspect of the present invention includes the stator according to any one of the fifth to seventh aspects of the present invention.
According to the eighth aspect of the present invention, since the stator according to any one of the fifth to seventh aspects of the present invention is provided, the operational effects of the fifth to seventh aspects of the stator according to the present invention are exhibited.

A motor according to the ninth aspect of the present invention includes any one of the first to fourth aspects of the insulator according to the present invention.
According to the ninth aspect of the present invention, since the insulator according to any one of the first to fourth aspects of the present invention is provided, the effects of the insulator according to any one of the first to fourth aspects of the present invention are exhibited.

  According to the present invention, it is possible to realize an insulator with higher output and lower cost, a stator including the same, and a motor including the same.

(a) is a longitudinal cross-sectional view of the motor of the embodiment according to the present invention, (b) is a left side view of the motor of the embodiment. (a) is a perspective view showing a teeth block connector, (b) is a perspective view showing one split core constituting the teeth block connector, and (c) is a perspective view showing an end plate at one end of the teeth block connector. FIG. 4D is a perspective view showing an end plate at the other end of the tooth block connector. (a) is the perspective view which looked at the insulator from the axial direction one side, (b) is the perspective view which looked at the insulator from the axial direction other side. (a) is a perspective view which shows the process in which an insulator and an insulator are assembled | attached to a teeth block coupling body, (b) is the B section enlarged view of (a). The perspective view which shows the process in which an outer peripheral ring is assembled | attached to a teeth block coupling body assembly. The perspective view which shows a teeth block outer periphery ring assembly. The perspective view which shows the state which mounted | wore the tooth block outer periphery ring assembly with the circuit board.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
1A is a longitudinal sectional view of the motor according to the embodiment of the present invention (a sectional view taken along line AA in FIG. 1B), and FIG. 1B is a left side view of the motor according to the embodiment. FIG.
The motor M of the embodiment includes an inner rotor type having a pair of motor cases 1a and 1b forming an outer shell, a stator Ms fixed in the motor cases 1a and 1b, and a rotor Mr that rotates inward of the stator Ms. Motor.

One motor case 1a is a stepped bottomed cylindrical member having a trunk portion 1a1 having a large diameter and a reduced diameter portion 1a2 having a reduced diameter and having an insertion hole 1a3 formed in the center.
The other motor case 1b is a stepped bottomed cylindrical member in which an insertion hole 1b3 is formed in the center having a body portion 1b1 having a large diameter and a reduced diameter portion 1b2 having a reduced diameter.

A bearing 2A is fixed in the reduced diameter portion 1a2 of one motor case 1a, and a bearing 2B is fixed in the reduced diameter portion 1b2 of the other motor case 1b. Both ends of the shaft 3 to which the rotor Mr is fixed are rotatably supported by the bearings 2A and 2B.
In the rotor Mr, a cylindrical rotor magnet 4 is fixed to a bottomed cylindrical support member 3s fixed to the shaft 3 by press fitting or the like. The rotor magnet 4 is a permanent magnet such as ferrite.

The stator Ms includes a teeth block coupling body 5 (see FIG. 2A) provided with a plurality of divided cores 5c, and a pair of insulators 7A and 7B that sandwich the teeth block coupling body 5 from both sides in the axial direction. And a cylindrical outer ring 8 (see FIG. 5) which is a magnetic body fitted to the teeth block coupling body 5 between the insulators 7A and 7B.
A circuit board 9 for controlling the motor M is disposed in an empty space in the motor cases 1a and 1b. Various electronic components (not shown) are mounted on the circuit board 9.

<Teeth block connector 5>
2 (a) is a perspective view showing the tooth block connector 5, and FIG. 2 (b) is a perspective view showing one split core 5c constituting the tooth block connector 5. FIG. ) Is a perspective view showing an end plate 5a at one end of the teeth block connector 5, and FIG. 2 (d) is a perspective view showing an end plate 5b at the other end of the teeth block connector 5.

The teeth block connector 5 includes an end plate 5a provided at one end in the axial direction, a plurality of divided cores 5c (see FIG. 2 (b)) that are divided and arranged radially, and an end plate provided at the other end in the axial direction. 5b is fixed integrally by caulking or the like.
Each divided core 5c is formed by laminating a large number of divided core plates 5i of substantially T-shaped electromagnetic steel plates fixed by caulking or the like. The divided core plate 5i is obtained by pressing, cutting and dividing a flat plate of an electromagnetic steel plate into a plurality of layers.

Between the split cores 5c shown in FIG. 2 (a), slots 5p, which are gaps (holes), are formed. An inner peripheral surface 5c1 of the split core 5c forms an inner peripheral surface Ms1 (see FIG. 1A) of the stator Ms.
The split core 5c is formed in a shape having a radially-shaped tooth portion 5c2 protruding outward from the center portion and an inner peripheral protrusion portion 5c3 extending from the root of the tooth portion 5c2 to both sides in the inner peripheral direction. Each divided core plate 5i has the same planar shape as the divided core 5c.

  The end plate 5a at one end shown in FIG. 2 (c) is arranged to face each divided core plate 5i, and is located to face the divided core end 5a1 having the same planar shape as the divided core plate 5i and the slot 5p. And it has the substantially flat plate shape which has the connection part 5a2 of the aspect which connects the split core 5c. A center hole 5a3 having a shape along the inner peripheral surface 5c1 of the split core 5c is formed at the center of the end plate 5a. The end plate 5a is made of the same electromagnetic steel plate as the split core plate 5i and has the same thickness.

Similarly, the other end plate 5b shown in FIG. 2 (d) is arranged to face each divided core plate 5i, and faces the divided core end 5b1 having the same planar shape as the divided core plate 5i and the slot 5p. And has a substantially flat plate shape having a connecting portion 5b2 in a mode of connecting the split cores 5c. A center hole 5b3 having a shape along the inner peripheral surface 5c1 of the split core 5c is formed in the center of the end plate 5b. The end plate 5b is made of the same electromagnetic steel plate as the split core plate 5i and has the same thickness.
The end plate 5a at one end, the plurality of split cores 5c, and the end plate 5b at the other end are fixed to each other by caulking or the like, and the tooth block coupling body 5 is configured.

  As described above, the end plates 5a and 5b are made of the same material (specifically as an electromagnetic steel plate) and have the same thickness as the divided core plate 5i of the teeth constituting the tooth block which is the divided core 5c. The “second protrusion” was not provided and a substantially flat plate was used. By doing so, the end plates 5a and 5b and the divided core plate 5i of the teeth can be easily pressed with one identical progressive die, which is the most reasonable.

<Insulator 7A, 7B>
FIG. 3A is a perspective view of the insulator 7A viewed from one side in the axial direction, and FIG. 3B is a perspective view of the insulator 7A viewed from the other side in the axial direction.
The insulator 7A is formed of an elastic resin. For example, PBT (polybutylene terephthalate) is used as the resin.

The insulator 7A includes a short cylindrical portion 7a1, an arm portion 7a2 radially extending from the cylindrical portion 7a1, and an annular coil guide portion extending on the opposite side of the arm portion 7a2 in the axial direction. 7a4.
The inner diameter s1 (see FIG. 5) of the cylindrical outer ring 8 has substantially the same dimension as the outer diameter of the arm portion 7a2 of the insulator 7A (the outer diameter of the arm portion 7b2 of the insulator 7B).

  As shown in FIG. 3 (b), the arm portion 7a2 is formed in a substantially U-shaped shape having an opening 7a3 directed outward, and a pair of flange portions 7at that form the opening, It has a winding drum portion 7ad formed radially from the central axis in succession at 7at, and an extended connecting portion 7ae formed continuously in a cylindrical shape on the inner diameter side of the winding drum portion 7ad. A coil (not shown) constituting the stator Ms is wound around the arm portion 7a2.

  An engagement protrusion 7a7 and a through hole 7a8 penetrating through the engagement protrusion 7a7 in the axial direction are formed in the inner peripheral portion of the arm portion 7a2. The through hole 7a8 serves as a space through which the mold can be removed when the engagement protrusion 7a7 is formed. Due to the through-hole 7a8, the insulator 7A has a shape without an undercut.

  The engaging protrusion 7a7 is configured to be fitted into the slot 5p (see FIG. 2B) of the end plate 5a of the tooth block connector 5 by elastically deforming the vicinity thereof. The engagement protrusion 7a7 is fitted into the slot 5p of the tooth block coupling body 5, whereby the teeth block coupling body 5 can be reinforced (see FIG. 7).

  A chamfered portion a7c in which a chamfering or an R chamfer is formed is provided on the core insertion side of the engaging projection 7a7 (the tip side of the insulator 7A facing the tooth block coupling body 5). The chamfered portion a7c is provided for facilitating insertion into the tooth block coupling body 5. For example, the chamfered portion, the R chamfered portion, and the combination thereof shown in the figure can be applied, and the corner portion can be removed to prevent insertion. As long as it does not become a shape, selection of a flat surface, a curved surface shape, etc. is arbitrary.

  Further, the axial length of the engagement protrusion 7a7 may be set to an appropriate predetermined length having necessary strength and ease of attachment. That is, the axial length of the engagement protrusion 7a7 does not have to be the entire length of the slot 5p that can be fitted into the slot 5p on the inner peripheral side. If it is provided over the entire length of the slot 5p, it is strong in strength and good for reinforcing the tooth block connecting body 5. However, the rigidity becomes high and resistance when the insulators 7A and 7B are inserted into the tooth block connecting body 5 is increased. It becomes difficult to do.

  On the contrary, if the axial length of the engagement protrusion 7a7 is too short, the insertion becomes easy, but the reinforcement strength of the reinforcement of the teeth block coupling body 5 is weak, and the role of reinforcing the teeth block coupling body 5 cannot be fulfilled. Therefore, the axial length of the engaging protrusion 7a7 may be set to a predetermined length as appropriate, taking the balance between the strength required to reinforce the teeth block connector 5 and the ease of insertion.

  The annular coil guide portion 7a4 includes a flat plate portion 7a5 formed in a radial direction between adjacent arm portions 7a2, and an arcuate flange portion 7a6 extending in an arc shape in the axial direction from the outer peripheral portion of the flat plate portion 7a5. ing. A corner portion of the arc-shaped flange portion 7a6 is chamfered a6c to prevent the coil from being damaged when the coil is wound.

Since the insulator 7B has the same shape as the insulator 7A, the reference numeral “a” of the insulator 7A is changed to “b”, and detailed description thereof is omitted.
The engaging protrusion 7b7 (see FIG. 4A) of the insulator 7B is configured to be fitted into the slot 5p of the teeth block connector 5 by elastically deforming the vicinity thereof.
The engagement projection 7a7 of the insulator 7A and the engagement projection 7b7 of the insulator 7B are fitted into the slot 5p of the teeth block coupling body 5, whereby the teeth block coupling body 5 is reinforced. The strength of is increased.

<Assembly of motor M>
Next, the assembly process of the motor M shown in FIG. 1 will be described.
FIG. 4A is a perspective view showing a process of assembling the insulator 7A and the insulator 7B to the tooth block connector 5, and FIG. 4B is an enlarged view of a portion B in FIG. 4A.

  A tooth portion of the teeth block connecting body 5 between the arm portion 7a2 having a substantially U-shape outside the insulator 7A as indicated by an arrow α1 from the end plate 5a side of the teeth block connecting body 5 on the insulator 7A. 5c2 is sandwiched, and the chamfered portion a7c (see FIG. 4 (b)) of the engaging projection 7a7 of the insulator 7A gets over the connecting portion 5a2 of the end plate 5a from the outside, and enters the slot 5p. The tooth block connector 5 is pressed.

Then, the chamfered portion a7c of the engaging projection 7a7 of the insulator 7A comes into contact with the connecting portion 5a2 of the end plate 5a and elastically deforms outward to overcome from the outside, so that each engaging projection 7a7 of the insulator 7A is connected to the teeth block. The body 5 is fitted into a slot 5p at a corresponding position.
In addition, the dimension of any of the places where the insulator 7A is fitted to the teeth block coupling body 5 is formed to be slightly smaller than the area where the insulator 7A is fitted to the teeth block coupling body 5.

  Similarly, the insulator block 7B is connected between the teeth block connecting body 5 and the arm portion 7b2 which is substantially U-shaped outward from the insulator 7B from the end plate 5b side of the teeth block connecting body 5 as indicated by an arrow α2. And the chamfered portion b7c of the engaging projection 7b7 of the insulator 7B gets over the connecting portion 5b2 of the end plate 5b from the outside and enters the slot 5p so that the insulator block 7B is inserted into the tooth block connecting body 5 Press on.

  Then, the chamfered portion b7c of the engaging projection 7b7 of the insulator 7B abuts on the connecting portion 5b2 of the end plate 5b and elastically deforms outward to overcome from the outside, and each engaging projection 7b7 of the insulator 7B is connected to the teeth block connecting body. 5 is fitted into the slot 5p at the corresponding position.

  Similar to the insulator 7A, the insulator 7B is formed such that the size of any of the places where the teeth block connecting body 5 is fitted is slightly smaller than the place where the teeth block connecting body 5 is fitted.

  As a result, the insulators 7A and 7B are inserted into the teeth block connector 5 at a low pressure, and the teeth block connector assembly 5A (see the right side in FIG. 5) in which the insulators 7A and 7B and the teeth block connector 5 are assembled. FIG. 5 is a perspective view showing a process of assembling the outer ring 8 to the tooth block connector assembly 5A.

  Then, a coil winding (not shown) that generates a magnetic field of the stator Ms is formed in the arm portions 7a2, 7b2 and the flat plate portions 7a5, 7b5 through the openings 7a3, 7b3 of the insulators 7A, 7B of the teeth block assembly 5A. Done. Since the chamfers a6c and b6c are applied to the arcuate collars 7a6 and 7b6 during winding, the coil is prevented from being caught and damaged by the arcuate collars 7a6 and 7b6.

  Here, the teeth block coupling body 5 has a star shape in which the inner peripheral surface side is connected in an annular shape, and the teeth portions 5c2 extend radially outward and the outer peripheral side is opened. Since the insulators 7A and 7B are fitted to the teeth block connector 5 and assembled, the winding can be performed from the widely opened outer peripheral side.

  Compared to the conventional structure in which winding is performed through a coil in a narrow slot on the inner circumference side, there is no work restriction and the degree of freedom in winding work is high and the work can be done easily, so the tact time is greatly reduced. be able to. Therefore, it is possible to contribute to cost reduction by improving the efficiency of winding work and improving equipment efficiency.

  In addition, the coil space factor can be easily increased by performing the winding from the outer peripheral side of the open teeth block coupling body 5 as compared to performing the winding from a narrow slot on the inner peripheral side. The number of turns can be increased. For this reason, the magnetic flux density in the stator Ms can be increased, and a higher output motor can be obtained.

The inner diameter s1 of the cylindrical outer ring 8 shown in FIG. 5 has an outer diameter s2a (see FIG. 3 (a)) of the arc-shaped flange 7a6 of the insulator 7A and an outer diameter s2b (see FIG. 3) of the arc-shaped flange 7b6 of the insulator 7B. 4 (a) (see right side).
On the inner diameter side of the outer peripheral ring 8, a tooth insertion recess 8 a into which the tip of the tooth portion 5 c 2 of the teeth block coupling body 5 is fitted is recessed at a position facing the teeth portion 5 c 2 of the teeth block coupling body 5. Yes. The outer ring 8 is rationally made of the same material and the same thickness as the divided core plate 5i, and is manufactured by pressing simultaneously with the divided core plate 5i.

  The outer ring 8 having the above-described configuration is placed outside the teeth block connector assembly 5A so that the teeth insertion recess 8a is aligned with the tip of the teeth portion 5c2 of the teeth block connector 5 as indicated by the white arrow α3 in FIG. Press to assemble.

  Then, the arc-shaped flange portion 7a6 of the insulator 7A of the teeth block connector assembly 5A is elastically deformed inward, and the tip portion of the teeth portion 5c2 of the teeth block connector 5 is in the teeth insertion recess 8a of the outer ring 8. The outer ring 8 is inserted between the arc-shaped flange 7a6 of the insulator 7A of the lock connector assembly 5A and the arc-shaped flange 7b6 of the insulator 7B.

  Thereby, the teeth block outer periphery ring assembly 8A (refer FIG. 6) by which the outer periphery ring 8 was assembled | attached to the teeth block coupling body assembly 5A by which the coil was wound is assembled. FIG. 6 is a perspective view showing the teeth block outer peripheral ring assembly 8A.

  Thereafter, as shown by a two-dot chain line in FIG. 6, a hole (not shown) formed in the circuit board 9 is inserted into a pin (not shown) formed in the insulator 7B of the tooth block outer ring assembly 8A, and the pin is melted. Then, the circuit board 9 is attached to the tooth block outer peripheral ring assembly 8A (see FIG. 7). FIG. 7 is a perspective view showing a state in which the circuit board 9 is mounted on the tooth block outer peripheral ring assembly 8A. Note that the circuit board 9 may be assembled by a method other than that described.

  Then, as shown in FIG. 1 (a), the outer ring 8 assembled to the teeth block outer ring assembly 8A is press-fitted or bonded into the motor case 1b in which the bearing 2B is fixed in the reduced diameter portion 1b2. Secure with.

  Thereafter, the rotor Mr to which the cylindrical rotor magnet 4 is fixed to the support member 3s fixed to the shaft 3 is inserted into the teeth block outer ring assembly 8A, and one end of the shaft 3 to which the rotor Mr is fixed is inserted. It is supported by a bearing 2B fixed in the motor case 1b.

  Then, the other side of the shaft 3 to which the rotor Mr is fixed is inserted into the bearing 2A fixed to the reduced diameter portion 1a2 of the motor case 1a, and the outer ring 8 assembled to the teeth block outer ring assembly 8A is connected to the motor. The motor M (see FIG. 1) is assembled by fixing the body 1a1 of the case 1a by press-fitting or bonding.

According to the said structure, there exists the following effect.
1. The motor M of the embodiment is assembled by the work of fitting the insulators 7A and 7B into the teeth block coupling body 5 as compared with the configuration in which the stator is integrally formed by a conventional mold, so that the assembly work is easy and the productivity is improved. .

2. Compared to the conventional method of inserting the protrusions (second protrusions) of both end plates described in Patent Documents 1 and 2, the configuration of the split core is such that nothing is inserted into the gap between the split cores in the circumferential direction. (Arrangement) is stabilized.

3. When the outer ring 8 is assembled by press fitting or the like outside the teeth block connector assembly 5A in which the insulators 7A and 7B and the tooth block connector 5 are assembled, the axial direction of the outer ring 8 is the insulators 7A and 7B. Since the arc-shaped flange portions 7a6 and 7b6 are prevented from coming off, the outer ring 8 can be fixed to the teeth block connector 5 with a weak force. Therefore, the influence (deformation / strain) on the inner diameter side of the teeth block connector 5 (the stator Ms) can be reduced. In addition, the influence (deformation / distortion) on the inner diameter side of the teeth block coupling body 5 (stator Ms) due to tension and external force during winding and handling can be reduced.

4). As a result, the roundness of the teeth block coupling body 5 as the stator core is improved, so that the gap between the rotor magnet 4 and the inner peripheral surface 5c1 (Ms1) (see FIG. 1 (a)) of the teeth core coupling body 5 of the stator core. Therefore, the magnetic field of the motor M can be more effectively and effectively operated. Therefore, the magnetic efficiency is improved, and the motor M with high output can be obtained.

5. Since the tooth block connecting body 5 is a split core system, the winding work can be performed from the outer peripheral side of the tooth block connecting body 5, so that the winding process can be greatly shortened and the efficiency can be improved and the cost can be reduced. Can contribute to down.

6). By winding the coil from the outer peripheral side of the teeth block coupling body 5, the space factor can be easily increased, and the number of turns can be increased. Therefore, the magnetic flux density can be increased to obtain a higher output motor.
7). From the above, an insulator with higher output and lower cost, a stator including the same, and a motor including the same can be realized.

<Other embodiments>
1. The method for assembling the motor M is an example, and other assembling methods may be adopted.

2. The case where the engaging protrusions 7a7 and 7b7 are provided projecting inwardly on the inner peripheral surface side of the extended connecting portions 7ae and 7be is illustrated. However, if the engaging protrusions 7a7 and 7b7 are fitted in the slot 5p, A configuration may be adopted.

3. The divided core plate 5i and the end plates 5a and 5b of the teeth are not limited to the same material, the same thickness, and a substantially flat plate, but the end plate 5a, The thickness of 5b can be changed. Further, if a slight change in the arrangement is allowed, the end plates 5a and 5b can be changed to a similar material of the divided core plate 5i constituting the teeth.

  While various embodiments of the present invention have been described above, various modifications and changes can be made within the scope of the present invention. That is, the specific form of the present invention can be arbitrarily changed as appropriate without departing from the spirit of the invention.

2A, 2B Bearing 3 Shaft (Rotating shaft)
4 Rotor magnet (magnet)
5 Teeth block connector 5a, 5b End plate 5c Split core (Teeth block)
5c2 Teeth part (winding part)
5p Slot 7A, 7B Insulator 7a1 Cylindrical part 7a6, 7b6 Arc shaped collar part (saddle part)
7a7, 7b7 engagement protrusion (protrusion)
7ad, 7bd Winding body part 7ae, 7be Stretched connection part 7at collar part M motor Mr rotor Ms stator

Claims (9)

A rotor having a magnet fixed to a rotating shaft supported by a bearing;
A plurality of teeth blocks are arranged in an annular shape with a slot in between, and ends of the teeth blocks having the same shape connected to the plurality of teeth blocks in which both axial end surfaces of the teeth blocks are arranged in an annular shape A stator having a teeth block connector constituted by a plate,
An insulator for an inner rotor type motor in which the rotor rotates in the stator,
Formed radially, covering and covering the wound portion of each of the teeth blocks, and a winding drum portion around which the coil is wound;
A flange that covers the coil on the outer peripheral side;
A cylindrical portion for connecting the winding drum portion in an annular shape;
A projection that fits into the slot;
An insulator, wherein the stator is configured by being fitted to the tooth block connector. The insulator according to claim 1, wherein the protrusion is provided so as to protrude inwardly on an inner peripheral surface side of an extending connection portion that connects the adjacent winding body portions. 3. The insulator according to claim 1, wherein the protrusion is chamfered at a corner portion of a tip that comes into contact with the teeth block coupling body when fitted into the slot. 4. The projection has a strength to reinforce the teeth block coupling body with respect to an axial length of the slot, and has a predetermined length that can be fitted into the slot without hindrance. The insulator according to any one of claims 1 to 3. The insulator according to any one of claims 1 to 4, comprising the insulator,
The stator, wherein the end plate constituting the tooth block coupling body is made of the same material as the electromagnetic steel plate constituting the tooth block. The insulator according to any one of claims 1 to 4, comprising the insulator,
The stator, wherein the end plate constituting the teeth block coupling body has the same thickness as the electromagnetic steel plate constituting the teeth block. The insulator according to any one of claims 1 to 4, comprising the insulator,
The stator, wherein the end plate constituting the tooth block coupling body is constituted by a substantially flat plate. A motor comprising the stator according to any one of claims 5 to 7. A motor comprising the insulator according to any one of claims 1 to 4.

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