JP2912789B2 - Abduction type induction motor stator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator in which a winding is wound in a series in an abduction type induction motor used for driving a fan of home electric appliances.

[0002]

2. Description of the Related Art In recent years, in the production of small electric motors, it has been required to pursue further mechanization and rationalization of costs and to further improve safety and quality.

Conventionally, as shown in FIGS. 12 to 19, a stator of this type of an abduction type induction motor has a plurality of stators having a plurality of teeth 103 in an outer circumferential direction of a shaft hole 102 into which a shaft 101 is press-fitted. The core core 104 is punched and laminated, and a substantially cylindrical terminal block 106 provided with a plurality of conductive pins 105 is arranged on the upper end surface of the stator core 104. A slot insulating film 109 bent and formed into a shape substantially the same as the planar shape of the slot 108 is inserted, the starting end 107c of the winding 107 is tied to a predetermined conductive pin 105, and the winding 107 is wound directly from the slot opening 108a. Dress. After winding, the slot opening insulating wedge 110 is inserted between the winding 107 and the slot insulating film 109 or between the slot insulating film 109 and the stator core 104 to form a stator of the motor. The slot insulating film 109 has folding lines 109a at both ends in the insertion direction into the slot 108.
The cuff-shaped folded portion 109b is formed by bending in the anti-slot direction along.

In the above structure, the slot insulating film 1
Reference numeral 09 denotes a film made of an electrically insulating material such as polyester, which keeps electrical insulation between the winding 107 and the stator core 104. Cuff-shaped folded portions 109b formed at both ends in the insertion direction into the slot 108 are brought into contact with the end face of the stator core 104 to maintain the position. In addition, the terminal block 106 having a substantially cylindrical shape can be easily processed by entanglement the start and end 107c of the winding 107 with the conductive pin 105, thereby promoting the mechanization of manufacturing. Adhesive or terminal block 10 to fit
6 is fixed to the end face of the stator core 104 by using the thickness of the shaft through hole 106a and the pressure contact strength with the shaft 101.

[0005]

In such a conventional stator of the abduction type induction motor, the slot insulating film 10 is used.
9 is mechanically bent, so that it is inserted into the slot 108 and then turned back.
9b gradually spreads to the opposite side of the slot, and the folded end 10
9c spreads over the outer peripheral surface of the stator core 104. After winding the winding 107, the slot opening insulating wedge 11
0 is inserted between the winding 107 and the slot insulating film 109, the folded end 109c is
There is a problem in that the rotor remains protruding beyond the outer peripheral surface of the stator core 04 and comes into contact with a rotor (not shown) facing the stator core 104 and causes abnormal noise.

As a method of preventing the folded end portion 109c from contacting the rotor, a slot opening insulating wedge 110 is used.
May be inserted between the slot insulating film 109 and the stator core 104. In this case, however, it is necessary to insert the folded back end portion 109c while forcibly holding it down toward the center of the slot. There is a problem that the work of inserting the opening insulating wedge 110 becomes more difficult.

Next, there is a problem that the terminal block 106 disposed on the upper end face of the stator core 104 is displaced due to vibration in the manufacturing process, and the work of tying the winding start and end 107c to the conductive pin 105 cannot be performed smoothly. there were.

Further, the winding 107 is connected to the slot opening 1.
08a, the tension of the winding 107 is applied to the folded portion 109b of the slot insulating film 109 when the winding is performed in series.
There is a problem that the folded portion 109b falls down to the tooth portion 103 side, and a sufficient insulation distance between the winding 107 and the stator core 104 cannot be secured.

It is a first object of the present invention to solve the above-mentioned problems, and it is a first object of the present invention to provide a slot insulating film which can be securely locked without the folded portion protruding beyond the outer periphery of the stator core.

A second object of the present invention is to eliminate the positional displacement of the terminal block and securely fix the terminal block to the stator core, thereby enabling a smooth operation.

A third object is to improve the quality so that even if the winding is wound in series, the insulation between the winding and the stator core can be sufficiently achieved.

[0012]

In order to achieve the first object, the stator of the abduction type induction motor according to the present invention has a first means inserted along a slot plane shape of the stator core,
A slot insulating film that is caught by the cuff-shaped folds provided at both ends in the insertion direction and is locked to the end face of the stator core. .

Further, in order to achieve the second and third objects, a second means is provided in the outer peripheral direction of the lower portion of the cylinder of the terminal block, based on the width between the slots around which the first winding is wound, by using the slot insulating film. The width dimension excluding the thickness of the folded portion, and a flat flange having a height equal to or greater than the folded width of the slot insulating film is extended along the stator core end face by the number of the first windings. .

In order to achieve the third object,
Means has a width obtained by removing the thickness of the folded portion of the slot insulating film from the width between slots around which the second winding is wound, on the surface of the substantially trapezoidal winding jig for winding which is in contact with the stator core. A flat spacer having the same height as the folded width of the slot insulating film is provided.

In order to achieve the second object, the fourth
Means has a configuration in which the outer diameter of the shaft protruding above the upper end surface of the terminal block is larger than the outer diameter size of the shaft below the upper end surface of the terminal block, and the terminal block pressing surface is formed on the shaft.

In order to achieve the second object, the fifth
Means is to provide a groove for attaching a terminal block pressing member to a shaft projecting upward from the upper end surface of the terminal block, instead of forming a terminal block pressing surface on the shaft.

In order to achieve the second object, the sixth
Means, instead of forming the terminal block pressing surface on the shaft, integrally form an inner cylinder having the same inner diameter as the shaft hole provided in the terminal block, and determine the length of this inner cylinder as the height of the terminal block. It is configured such that the inner diameter of the shaft hole is increased by the length of the protruding portion, and a fitting portion is provided above the stator core to be laminated.

[0018]

According to the first aspect of the present invention, even if the folded portion is widened in the direction opposite to the slot, the end portion does not spread beyond the outer periphery of the stator core.

Further, with the configuration of the second and third means, the folded portion of the slot insulating film does not fall even when the tension of the winding is applied.

Further, with the configuration of the second, fourth, fifth and sixth means, the terminal block is securely fixed to the upper end face of the stator core, and the position of the terminal block does not shift.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

As shown in the figure, a plurality of slots 11 of a stator core 4 laminated with a plurality of teeth 3 radially in the outer circumferential direction of the shaft hole 2 are provided with a plan shape substantially similar to that of the slots 11. The slot insulating film 9 bent and formed in the same shape is inserted, and a required amount of the winding 12 is wound straight from the slot opening 11a. After winding, the slot opening insulating wedge 10 is inserted between the winding 12 and the slot insulating film 9 to form a stator of the electric motor. The slot insulating film 9 is provided at both ends of the slot 11 in the insertion direction.
A cuff-shaped folded portion 9a is formed by folding in the direction opposite to the slot along the folded line 9b, and cutout portions 9c each having a size equal to or greater than the folded width h are formed at both ends of the folded portion 9a. .

With the above configuration, the slot insulating film 9
Is a film made of an electrically insulating material such as polyester, for maintaining electrical insulation between the winding 12 and the stator core 4. The cuff-shaped folded portions 9a formed at both ends in the insertion direction into the slot 11 are brought into contact with the end face of the stator core 4 to maintain the position. Since it is formed, it does not protrude beyond the outer periphery of the stator core 4.

As described above, according to the stator of the abduction type induction motor of the first embodiment of the present invention, the folded portion 9a can be securely locked without protruding beyond the outer periphery of the stator core 4. .

In this embodiment, notches having the same size as the width of the folded portion are formed at both ends of the folded portion of the slot insulating film. No difference in effect.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

As shown in the figure, the terminal block 6 has a shaft through hole 6a formed on the upper end surface 6b through which the shaft 1 penetrates. A flat flange 7 having a width dimension excluding the thickness of the insulating film 9 and having a height equal to or greater than the folding width h of the slot insulating film 9 is formed along the end face of the stator core 4 with the first winding 12a. It is extended by the number.

With the above configuration, the flange portion 7 of the terminal block 6 is pressed into the tooth portion 3 by the first winding to be securely fixed in the radial direction of the terminal block 6. The folded portion 9a of the slot insulating film 9 between the slots for the first windings 12a adjacent to the flange portion 7 of 6 comes into contact with each other.

As described above, according to the stator of the abduction type induction motor of the second embodiment of the present invention, the terminal block 6 is prevented from being displaced and is securely fixed to the stator core 4. Can be sufficiently insulated.

Next, a third embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. Hereinafter, the same portions as those of the first and second embodiments are denoted by the same reference numerals, and the detailed description thereof will be omitted.

As shown in the figure, the winding winding jig 14 has a substantially trapezoidal shape, and its surface is mirror-finished so that the winding wire can be wound smoothly, and a second surface is provided on the surface with which the stator core 4 contacts. Winding 1
The width of the slot insulating film 9 is determined by subtracting the thickness of the slot insulating film 9 from the width between slots around which the wire 2b is wound.
Is provided with a plate-like spacer 15 having substantially the same height as the folded width.

With the above configuration, the folded portion 9a of the slot insulating film 9 between the slots for the second winding 12b is in contact with the second winding spacer 15 provided on the winding winding jig 14.

As described above, according to the stator of the abduction type induction motor of the third embodiment of the present invention, the insulation between the second winding 12b and the stator core 4 can be sufficiently increased.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. As shown in the figure, the shaft 1 has an outer diameter larger than an upper end surface 6b of the terminal block 6 larger than a lower diameter thereof to form a pressing surface 1a for pressing the upper end surface 6b of the terminal block 6. I have.

With the above configuration, the terminal block 6 can be pressed by the pressing surface 1a of the shaft 1.

As described above, according to the stator of the abduction type induction motor of the fourth embodiment of the present invention, the terminal block 6 can be securely fixed in the axial direction of the stator core 4.

Next, a fifth embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. Shaft 1 as shown
The outer diameter is finished by press-fitting the stator core 4 into the shaft hole 2, a groove 1 b is formed in a portion located on the upper end surface 6 b of the terminal block 6, and a pressing member 16 such as an E-ring is provided. Is configured to be attachable.

In the above configuration, the groove 1b of the shaft 1
The terminal block 6 can be pressed by the pressing member 16 attached to the terminal block 6.

As described above, according to the stator of the abduction type induction motor according to the fifth embodiment of the present invention, the terminal block 6 is pressed by the pressing member 16 and is securely fixed in the axial direction of the stator core 4. it can.

Further, since the grooving is performed only on a part of the shaft 1, the shaft manufacturing process can be shortened.

Next, a sixth embodiment of the present invention will be described with reference to FIG.
1 will be described. As shown in the figure, an inner cylinder 8 having an inner diameter dimension equal to the inner diameter dimension of the shaft hole 2, an axial dimension larger than the height of the terminal block 6, and having a protruding portion 8 a at the tip is integrated with the cylindrical terminal block 6. Is formed. Also,
On the side of the stator core 4 on which the terminal block 6 is arranged, the inner diameter of the shaft hole 2 is increased by an amount corresponding to the length of the protruding portion 8a, and a receiving portion 13 for fitting the protruding portion 8a is formed. I have.

In the above configuration, the shaft 1 is attached to the inner cylinder 8.
And the protrusion 8 a can be press-fitted into the receiving portion 13.

As described above, according to the stator of the abduction type induction motor of the sixth embodiment of the present invention, the terminal block 6 can be securely fixed to the stator core 4 in the axial direction and the radial direction. .

Further, in this configuration, since the terminal block 6 is fixed to the stator core 4 by itself, additional processing of the shaft 1 is not required, and at the same time, a pressing member to be attached to the shaft is not required. The number of parts can be reduced.

[0045]

As is clear from the above embodiments, according to the present invention, even if the folded portion spreads in the anti-slot direction,
The end no longer extends beyond the outer circumference of the stator core, no abnormal noise is generated by contact with the rotor core, and the slot opening insulating wedge is inserted between the conductor and the stator core to reduce the manufacturing process. A stator for an abduction type induction motor can be provided that can easily hold the slot insulating film by the folded portion abutting against the end face of the stator core and sufficiently exhibit the insulating effect.

Also, when the first winding is wound directly, the flange provided on the terminal block prevents the folded portion of the slot insulating film from falling down, and the abduction can sufficiently secure insulation between the winding and the stator core. And a stator for the induction motor.

When the second winding is wound directly, the spacer provided on the winding winding jig prevents the folded portion of the slot insulating film from falling down, and the insulation between the winding and the stator core is sufficiently ensured. It is possible to provide an abduction type induction motor stator that can be used.

Further, since the terminal block is securely fixed to the stator core by the terminal block pressing surface of the shaft, the work of tying the start and end of the winding to the conductive pin can be performed smoothly, and the abduction type induction can be performed. An electric motor stator can be provided.

Further, by providing a groove in the shaft and attaching the pressing member, the work of tying the winding start and end to the conductive pin is facilitated, and at the same time, the outer diameter of the shaft other than the grooved portion 1 is reduced.
Since the types can be unified, it is possible to provide a stator of an abduction type induction motor that realizes improvement in production efficiency by simplifying process management and reducing processing time.

Further, by integrally molding the inner cylinder with the terminal block, the work of tying the start and end of the winding to the conductive pin can be smoothly performed, and at the same time, the production efficiency and the number of parts can be reduced from the viewpoint of production and material. And a stator for the abduction type induction motor that realizes the rationalization of the above.

[Brief description of the drawings]

FIG. 1 is a plan view of a stator of an abduction type induction motor according to a first embodiment of the present invention.

FIG. 2 is a plan view of the slot insulating film.

FIG. 3 is a perspective view showing the molding of the slot insulating film.

FIG. 4 is an enlarged perspective view of a main part of the slot insulating film.

FIG. 5 is a cutaway sectional view of the same part.

FIG. 6 is a sectional view of the second embodiment when the terminal block is mounted.

FIG. 7 is a sectional view of a first winding tooth portion of the third embodiment.

FIG. 8 is a sectional view of the fourth embodiment when the winding jig is mounted.

FIG. 9 is a sectional view of the second winding tooth portion.

FIG. 10 is a sectional view of the fifth embodiment when the terminal block is mounted.

FIG. 11 is a sectional view of the sixth embodiment when the terminal block is mounted.

FIG. 12 is a plan view of a stator of a conventional everting type induction motor.

FIG. 13 is a plan view of the slot insulating film.

FIG. 14 is a molded perspective view of the slot insulating film.

FIG. 15 is an enlarged perspective view of a main part of the slot insulating film.

FIG. 16 is a cutaway sectional view of the same part.

FIG. 17 is a partially cutaway sectional view according to another embodiment.

FIG. 18 is a sectional view of the first winding tooth portion.

FIG. 19 is a sectional view when the terminal block is mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shaft 1a Pressing surface 1b Groove part 3 Tooth part 4 Stator iron core 6 Terminal block 7 Flange part 8 Inner cylinder 8a Projection part 9 Slot insulating film 9a Folded part 9b Folded wire 9c Notch part 12 Winding 13 Receiving part 14 Winding winding Fixture 15 Spacer 16 Pressing member h Fold width

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H02K 3/34 H02K 15/04 H02K 17/08

Claims (6)

(57) [Claims] 1. A stator core comprising a plurality of stator cores having a required number of teeth radially arranged in the outer circumferential direction of a shaft hole, and a first winding and a second winding formed by adjacent teeth are wound in series. Slot, a slot insulating film that insulates between the winding and the stator core, a shaft that supports the stator, and a plurality of conductive pins that entangle the shaft through hole and the beginning and end of the winding on the upper end surface. It consists of a substantially cylindrical terminal block provided and a substantially trapezoidal winding winding jig attached to the tip of the spindle of a flyer-type winding machine, and the slot insulating film is inserted along the slot plane shape of the stator core. An electric insulating film that is caught by the cuff-shaped folds provided at both ends in the insertion direction and is fixed to the end face of the stator core. Abduction type invitation with part The stator of the electric motor. 2. The width of the slot between the slots around which the first winding is wound, excluding the thickness of the folded portion of the slot insulating film, is equal to or greater than the width of the slot insulating film in the outer peripheral direction of the lower portion of the cylinder of the terminal block. 2. A stator for an abduction type induction motor according to claim 1, wherein a flat flange portion having a height dimension is extended by the number of first windings along the end face of the stator core. 3. A width of a substantially trapezoidal winding winding jig on a surface of a stator core in contact with a stator core, which is obtained by subtracting a thickness of a folded portion of a slot insulating film from a width between slots around which a second winding is wound. 2. The stator for an abduction type induction motor according to claim 1, further comprising a plate-shaped spacer having a dimension and the same height as a width of the slot insulating film. 4. The outer surface according to claim 1, wherein the outer diameter of the shaft projecting above the upper end surface of the terminal block is larger than the outer diameter size of the shaft below the upper end surface of the terminal block, and the pressing surface is formed on the shaft. Stator for roller induction motor. 5. The abduction type induction motor according to claim 1, wherein instead of forming the terminal block pressing surface on the shaft, a groove for mounting a pressing member is provided on the shaft protruding above the upper end surface of the terminal block. stator. 6. In place of forming the terminal block pressing surface on the shaft, an inner cylinder having the same inner diameter as the shaft hole provided in the terminal block is integrally formed, and the length of the inner cylinder is determined by the height of the terminal block. A protrusion is formed at a tip end of the stator core, the inner diameter of the shaft hole is increased by an amount corresponding to the length of the protrusion, and a receiving portion for fitting the protrusion is provided above the stator core to be laminated. Item 2. A stator for an abduction type induction motor according to item 1.