JPH06343237A - Stator of outer rotor type induction motor - Google Patents

Abstract

PURPOSE:To eliminate the protruding part of a returning part by inserting a film along the planar shape of the slot of a stator core, and providing notched parts having the same size of the returning width at four places of both ends of the returning part of a slot insulating film that is engaged with the edge of the stator core at a cuffs-shaped returning part provided at both end parts in the inserting direction. CONSTITUTION:A cuffs-shaped returning part 9a, which is formed by bending in the anti-slot direction along a returning line 9b, is formed at both ends of a slot insulating film 9 in the inserting direction into a slot 11. Notched parts 9c having the same size as a returning width (h), are formed at both end parts of the returning part 9a. The slot insulating film 9, which is bent and molded in the approximately same shape as the planar shape of the slot 11, is inserted into a plurality of slots 11 of a laminated stator iron core 4. A required amount of windings are wound in series from a slot opening part 11a. Even if the returning part spreads in the anti-slot direction, the end part does not protrude on the outer surface of the stator core, and abnormal sound is not generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator for winding a winding directly in an outer rotation type induction motor used for driving a fan of home electric appliances.

[0002]

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

Conventionally, as shown in FIGS. 12 to 19, a stator of an abduction type induction motor of this type has a plurality of fixing members having a plurality of tooth portions 103 in the outer peripheral direction of a shaft hole 102 into which a shaft 101 is press-fitted. The child iron 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 iron core 104. A slot insulating film 109 that is bent and formed into a shape substantially the same as the planar shape of the slot 108 is inserted, and the beginning and end 107c of the winding 107 are entwined with a predetermined conductive pin 105, and the winding 107 is wound directly from the slot opening 108a. To wear. After winding the 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 electric motor. The slot insulating film 109 is provided at both ends in the insertion direction of the slot 108 with folded lines 109a.
A cuff-shaped folded-back portion 109b is formed by bending the cuff-shaped folded portion 109b in the anti-slot direction.

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 serves to maintain electrical insulation between the winding wire 107 and the stator core 104. Cuff-shaped folded-back portions 109b formed at both ends in the insertion direction into the slot 108 are brought into contact with the end surface of the stator core 104 to hold the position. In addition, the substantially cylindrical terminal block 106 can be easily processed by entwining the beginning and end 107c of the winding 107 with the conductive pin 105 to facilitate mechanization of manufacturing. Adhesive or terminal block 10 to fit
6 is fixed to the end surface 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 the conventional stator of the outer rotation type induction motor, the slot insulating film 10 is used.
Since the folded-back portion 109b of 9 is mechanically bent, it is inserted into the slot 108 and then folded-back portion 10b.
9b gradually spreads to the side opposite to the slot side, and the folded end 10
9c spreads beyond the outer peripheral surface of the stator core 104. After winding the winding wire 107, the slot opening insulating wedge 11
When 0 is inserted between the winding wire 107 and the slot insulating film 109, the folded-back end portion 109c is fixed to the stator core 1
There is a problem in that it is in a state of protruding beyond the outer peripheral surface of No. 04 and comes into contact with a rotor (not shown) facing the stator core 104 to cause abnormal noise.

As a method of preventing the folded-back end portion 109c from contacting the rotor, the slot opening insulating wedge 110 is used.
It is conceivable that the slot is inserted between the slot insulating film 109 and the stator core 104, but in this case, since the expanded folded-back end 109c must be forcibly held in the slot center direction, the slot is inserted. There is a problem that the insertion work of the opening insulating wedge 110 becomes more difficult.

Next, there is a problem that the terminal block 106 arranged on the upper end surface of the stator core 104 is displaced due to the vibration in the manufacturing process, and it becomes impossible to smoothly entangle the winding start end 107c with the conductive pin 105. there were.

Further, the winding 107 is connected to the slot opening 1
The tension of the winding wire 107 is applied to the folded-back portion 109b of the slot insulating film 109 during the direct winding from 08a,
There is a problem in that the folded-back portion 109b falls toward the tooth portion 103 side and a sufficient insulation distance between the winding wire 107 and the stator core 104 cannot be secured.

SUMMARY OF THE INVENTION The first object of the present invention is to provide a slot insulating film which can be securely locked without the folded-back portion protruding beyond the outer circumference of the stator core.

A second object is to eliminate the positional displacement of the terminal block and securely fix it to the stator core to enable smooth work.

A third object is to improve the quality so that the winding and the stator core can be sufficiently insulated even if the winding is directly wound.

[0012]

In order to achieve the above-mentioned first object, the stator of the outer rotation induction motor of the present invention has the first means inserted along the slot plane shape of the stator core.
A slot insulating film that locks to the end face of the stator core with cuff-shaped folded-back portions provided at both ends in the insertion direction, and has notches of the same size as the folded-back width provided at four ends of the folded-back portion. .

Further, in order to achieve the second and third objects, the second means is to measure the width of the slot insulating film from the width between the slots in which the first winding is wound in the outer peripheral direction of the lower cylindrical portion of the terminal block. The width dimension excluding the thickness of the folded-back portion and the flat-plate-shaped collar portion having a height dimension equal to or greater than the folded-back width of the slot insulating film are extended along the stator core end surface by the number of the first windings. .

In order to achieve the third object, the third
The means is a width dimension obtained by removing the thickness of the folded portion of the slot insulating film from the width between the slots in which the second winding is wound, on the surface of the substantially winding trapezoidal winding jig that contacts the stator core. A flat plate-like 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
In this configuration, the outer diameter of the shaft protruding above the upper end surface of the terminal block is made larger than the outer diameter of the shaft below the upper end surface of the terminal block, and the terminal block pressing surface is formed on the shaft.

Further, in order to achieve the second object,
In this means, instead of forming the terminal block pressing surface on the shaft, a groove portion for mounting the terminal block pressing member is provided on the shaft projecting above the upper end surface of the terminal block.

In order to achieve the second object, the sixth
In place of forming the terminal block pressing surface on the shaft, the means of (1) integrally forms an internal cylinder having the same inner diameter as the shaft hole provided in the terminal block, and the length of this internal cylinder is the terminal block height. A larger size is provided with a protrusion at the tip, and the inner diameter of the shaft hole is increased by the length of the protrusion at the upper portion of the laminated stator iron core to provide a fitting portion.

[0018]

According to the present invention, by the structure of the above-mentioned first means, even if the folded-back portion spreads in the direction opposite to the slot, the end portion does not spread beyond the outer circumference of the stator core.

Further, with the constructions of the second and third means, the winding tension does not cause the folded portion of the slot insulating film to fall.

Further, by the constitution 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 is prevented from being displaced.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG.

As shown in the drawing, a plurality of slots 11 of a stator core 4 laminated with a plurality of tooth portions 3 radially in the outer peripheral direction of the shaft hole 2 are provided with a plurality of slots 11 and a plan shape of the slots 11. The slot insulating film 9 bent and formed in the same shape is inserted, and the required amount of the winding wire 12 is directly wound 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 in the insertion direction into the slot 11,
A cuff-shaped folded-back portion 9a is formed by bending it in the direction opposite to the slot along the folded-back line 9b, and notches 9c each having a size equal to or larger than the folded-back width h are formed at both ends of the folded-back portion 9a. .

With the above structure, the slot insulating film 9
Is a film made of an electrically insulating material such as polyester and is for maintaining electrical insulation between the winding wire 12 and the stator core 4. The cuff-shaped folded-back portions 9a formed at both ends in the insertion direction into the slot 11 are brought into contact with the end surface of the stator core 4 and hold their positions. However, even if the folded-back portion 9a spreads, the notch 9c Since it is formed, it does not protrude beyond the outer circumference of the stator core 4.

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

In this embodiment, notches having the same size as the folding width are formed at both ends of the folded portion of the slot insulating film. However, even if linear chamfered portions are formed at both ends of the folded portion, the same effect can be obtained. No difference in effect.

Next, a second embodiment of the present invention will be described with reference to FIG.
The description will be made with reference to FIG. The same parts as those in the first embodiment are designated 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 in the upper end surface 6b through which the shaft 1 penetrates, and in the outer peripheral direction of the lower part, from the width between slots in which the first winding 12a is wound to the slot. A flat plate-shaped collar portion 7 having a width dimension excluding the thickness of the insulating film 9 and a height dimension not less than the folded back width h of the slot insulating film 9 is provided along the end face of the stator core 4 with the first winding 12a. It is extended by the number.

With the above structure, the flange portion 7 of the terminal block 6 is pressed by the tooth 3 by the wound first winding, whereby the terminal block 6 is securely fixed in the radial direction and at the same time. The folded-back portion 9a of the slot insulating film 9 between the slots for the first winding 12a adjacent to the flange portion 7 of 6 contacts.

As described above, according to the stator of the outer rotor type induction motor of the second embodiment of the present invention, the terminal block 6 is securely fixed to the stator core 4 without displacement, and the first winding 12a and Can be fully insulated.

Next, a third embodiment of the present invention will be described with reference to FIG.
The description will be made with reference to FIG. Hereinafter, the same parts as those in the first and second embodiments will be designated by the same reference numerals, and detailed description thereof will be omitted.

As shown in the figure, the winding winding jig 14 has a substantially trapezoidal shape, the surface of which is mirror-finished so that the winding wire can be smoothly wound, and the surface on which the stator core 4 abuts has a second surface. Winding 1
2b has a width dimension between slots in which the thickness of the slot insulating film 9 is removed, and the slot insulating film 9
A flat plate-shaped spacer 15 having a height substantially the same as the folded width is provided.

With the above structure, 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 outer rotor induction motor of the third embodiment of the present invention, the insulation between the second winding wire 12b and the stator core 4 can be made sufficient.

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

With the above structure, 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 outer rotor 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.
A description will be given with reference to 0. Shaft 1 as shown
Has its outer diameter dimensioned by press-fitting into the shaft hole 2 of the stator core 4, has a groove portion 1b at a portion located on the upper end surface 6b of the terminal block 6, and is provided with a pressing member 16 such as an E ring. Is configured to be attached.

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

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

Since the groove cutting process 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.
This will be described with reference to 1. As shown in the figure, an inner cylinder 8 having an inner diameter equal to that of the shaft hole 2 and an axial dimension larger than the height of the terminal block 6 and having a protruding portion 8a at the tip is integrally formed with the cylindrical terminal block 6. Is formed. Also,
On the side of the laminated 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 the receiving portion 13 into which the protruding portion 8a is fitted is formed. There is.

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

As described above, according to the stator of the outer rotor 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 structure, since the terminal block 6 is fixed to the stator core 4 by itself, no additional processing is required for the shaft 1 and at the same time a pressing member attached to the shaft is not required. It is possible to reduce the number of parts.

[0045]

As is apparent from the above embodiments, according to the present invention, even if the folded portion spreads in the direction opposite to the slot,
The end does not spread beyond the outer circumference of the stator core, no abnormal noise is generated due to contact with the rotor core, and the slot opening insulating wedge is inserted between the conductor and the stator core to improve the manufacturing process. It is possible to provide the stator of the outer rotation induction motor in which the folded portion comes into contact with the end surface of the stator core and the position of the slot insulating film is reliably held and the insulating effect is sufficiently exerted.

Further, when the first winding is directly wound, the collar portion provided on the terminal block prevents the folded portion of the slot insulating film from falling down, and the outer winding which ensures sufficient insulation between the winding and the stator core. A stator of a induction motor can be provided.

Further, during the direct winding of the second winding, the spacer provided in the winding winding jig prevents the folded portion of the slot insulating film from falling down, and ensures sufficient insulation between the winding and the stator core. It is possible to provide a stator of an abduction type induction motor.

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

Further, by providing a groove on the shaft and attaching a pressing member, the work of entanglement of the winding start and the end with the conductive pin can be facilitated, and at the same time, the outer diameter dimension of the shaft other than the grooved portion 1
Since the types can be unified, it is possible to provide the stator of the outer rotation induction motor, which can improve the production efficiency by simplifying the process control and reducing the processing time.

Further, by integrally molding the inner cylinder on the terminal block, at the same time as facilitating the work of entwining the start and end of the winding with the conductive pin, the shaft production efficiency is improved and the number of parts is reduced. It is possible to provide a stator of an outer rotation type induction motor that realizes the rationalization of.

[Brief description of drawings]

FIG. 1 is a plan view of a stator of an outer rotation 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 molding perspective view of the slot insulating film.

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

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

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

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

FIG. 8 is a cross-sectional view of the fourth embodiment with a winding winding jig attached.

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

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

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

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

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

FIG. 14 is a perspective view showing the slot insulating film formed.

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

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

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

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

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

[Explanation of symbols]

 1 shaft 1a pressing surface 1b groove part 3 tooth part 4 stator core 6 terminal block 7 collar part 8 inner cylinder 8a protruding part 9 slot insulating film 9a folded part 9b folded line 9c cutout part 12 winding 13 receiving part 14 winding winding Mounting jig 15 Spacer 16 Pressing member h Folding width

Claims (6)

[Claims] 1. A stator core having a plurality of teeth radially arranged in the outer peripheral direction of a shaft hole and a required number of laminated stator cores, and a first winding and a second winding formed by adjacent teeth, are directly wound. Slot, insulating film that insulates the winding from the stator core, a shaft that supports the stator, and a plurality of conductive pins that tie the shaft through hole and the beginning and end of the winding on the upper end surface. Comprised of a substantially cylindrical terminal block provided and a substantially trapezoidal winding winding jig to be attached to the tip of the spindle of a fryer type winding machine, and the slot insulating film is inserted along the slot plane shape of the stator core. Then, an insulating film for electrical use that is locked to the end face of the stator core by the cuff-shaped folded-back portions provided at both ends in the insertion direction, and has notches having dimensions equal to or greater than the folded-back width at four end portions of this folded-back portion. Abduction type invitation The stator of the electric motor. 2. A width dimension obtained by removing the thickness of the folded portion of the slot insulating film from the width between slots around which the first winding is wound in the outer peripheral direction of the lower portion of the cylinder of the terminal block, and is not less than the folded width of the slot insulating film. 2. The stator of an outer-rotation induction motor according to claim 1, wherein a flat plate-like collar portion having a height dimension of 1 is extended along the end surface of the stator core by the number of the first windings. 3. A width obtained by removing the thickness of the folded portion of the slot insulating film from the width between slots in which the second winding is wound, on the surface of the substantially trapezoidal winding winding jig that contacts the stator core. The stator of an outer rotation induction motor according to claim 1, wherein a flat plate-shaped spacer having the same size as the folded width of the slot insulating film is provided. 4. The outer diameter according to claim 1, wherein the outer diameter of the shaft protruding above the upper end surface of the terminal block is larger than the outer diameter of the shaft below the upper end surface of the terminal block, and the pressing surface is formed on the shaft. Stator of rotary induction motor. 5. The outer rotation induction motor according to claim 1, wherein a groove for mounting the pressing member is provided on the shaft protruding upward from the upper end surface of the terminal block, instead of forming the terminal block pressing surface on the shaft. stator. 6. Instead of forming a terminal block pressing surface on the shaft, an internal cylinder having the same inner diameter as the shaft hole provided in the terminal block is integrally formed, and the length of the internal cylinder is adjusted to the terminal block height. And a receiving portion for fitting the protruding portion is provided in the upper portion of the stator core to be stacked, the inner diameter of the shaft hole is increased by the length of the protruding portion, Item 1. The stator of an outer rotation type induction motor according to Item 1.