JPH11206057A - Structure of insulator for stator core of motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the occupation ratio and further enable use of larger-size wires without damage to the wires during wire winding operation, by setting each corner of slots to 1/2 or below of the diameter of wires wound around wire winding portions. SOLUTION: Slits for passing wires through the insertion portions 4 in stator core slots are formed on the inside diameter side, and slots 6 in which wires are to be wound using the inner surfaces of the insertion portions 4 in the stator core slots are formed. The corners of each of the slots 6 are set to 1/2 or below of the diameter of the wires to be wound around wire winding portions 2. When wires are wound around the wire winding portions 2 with this constitution, the wires are arranged in orderly sequence from the outside diameter side to the inside diameter side by means of the taper in the sides of the wire winding portions 2 and wound around the wire winding portions 2 without gaps. Since walls 3 for fixing cross-over lines are formed outside the slots 6, strength is enhanced, and cross-over operation with larger-diameter wires can be feasible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an insulator structure for a stator core of a motor for insulating a stator core and windings of the motor.

[0002]

2. Description of the Related Art FIG. 11 is a partial sectional view showing the inside of a motor. A motor case 101 has a stator and a rotor 102 disposed therein. The stator is composed of a stator core 103 and a winding 104, and the winding 104 is wound around an insulator 105 to form a stator core 1.
03. The insulator 105 is a resin cover attached to the stator core 103 for insulating the stator core 103 and the windings 104 of the motor. The insulator 105 inserts the insertion portion at one end from one side into the slot of the stator core 103, and assembles with another insulator inserted from the other side of the stator core 103 to cover and insulate the inner wall surface of the slot of the stator core 103. Things. Then, a winding 104 is wound around a slot portion insulated by the insulator and wound around a portion to be wound between the slot portions.

FIGS. 12 to 14 show a conventional insulator 105 mounted on a stator core of a stepping motor from one side. The insulator 105 has a plurality of wound portions 107 radially projecting toward the center at predetermined intervals on the inner peripheral surface of the cylindrical portion 106. A retaining wall portion 108 extending in the direction is provided. The wound portion 107 is formed between the insertion portions inserted into the slots of the stator core, and the insertion portion covers the inner wall surface of the slot of the stator core 103 to provide insulation from the winding. At the opening end of the slot 109 inside the insertion portion, a connecting wire fixing pin 110 is provided on the inner peripheral surface of the cylindrical portion 106 at a predetermined interval from the inner peripheral surface in the axial direction. Normally, the connecting wire fixing pin 110 is omitted from the insulator mounted from the other side of the stator core.

[0004]

According to such a conventional insulator 105, the corner 111 of the slot 109 forming the wound portion 107 is provided with a predetermined angle R as shown in FIG. I have. Therefore, FIG.
As shown in FIG. 6, when the winding 104 is applied to the wound portion 107, the winding 1
04 cannot be applied, so that the range in which the winding 104 is applied is limited. Further, when the winding 104 is applied to the wound portion 107, as shown in FIG. 17, the winding 104 becomes unstable, a gap is formed between the windings 104, and a messy winding state is obtained.

[0005] Further, to fix the crossover, the wound portion 10 is fixed.
In the case where the fixing pins 110 are provided in the slots 109 between the 7, the nozzle 112 does not go farther than the crossover fixing pins 110 as shown in FIG.
There was a limit in the control of the nozzle 112, resulting in a gap. Further, as shown in FIG. 19, the winding 104 may protrude to the outer diameter side of the slot 109 during winding, and there is a possibility that the winding may be in a messy state.

As described above, the conventional insulator 105
Has a main purpose of insulating the stator core 103 and the windings 104, and has a shape in which the alignment of the windings is not emphasized. Therefore, the windings 104 are randomly wound and are wound first. There is a problem that the coil wire is scratched or a gap is formed between the wound coil wires, resulting in a poor occupation rate. At this time, even if the alignment of the windings 104 is improved by, for example, oscillating the nozzle of the winding machine, the windings 104 are eventually randomly wound due to the shape of the insulator 105.

Further, in the conventional insulator 105,
The crossover fixing pin 110 is located in the slot, and the crossover fixing pin 110 has a length equal to the length of the fixing pin 110 because the crossover passes over the coil end as shown in FIG. It is longer than the end so that it does not deviate from the crossover.

For this reason, as shown in FIG.
The connecting wire fixing pin 110 in the
4 cannot enter the back side and cannot be wound.
In addition, when the crossover is delivered (because the strength of fixing the wire is weak due to the pin shape), the crossover fixing pin 110 falls down inside the slot 109, further hindering the winding from entering the back side. I will. The longer the length L of the pin 110, the longer the length of the motor is.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and improves the occupation rate without damaging the winding at the time of winding, enables the use of thick wires, and shortens the overall length of the motor. It is an object to provide an insulator structure.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, an insertion portion is inserted into each slot of a stator core of a motor to cover an inner wall surface of the slot and a slot formed by the inner wall surface of the insertion portion. In the insulator structure for a stator core in which a wound portion for winding a winding between them is formed, each corner portion of the slot portion is
This is because the wire diameter is set to １ ／ or less of the wire diameter of the winding wound around the wound portion. In addition, the present invention provides a wound part in which an insertion part is inserted into each slot of a stator core of a motor to cover an inner wall surface of the slot, and a winding is wound between slots formed by the inner wall surface side of the insertion part. In the insulator structure for a stator core, the tapered portion is provided on the side surface of the wound portion along the radial direction. Further, the present invention is directed to a wound part in which an insertion part is inserted into each slot of a stator core of a motor to cover an inner wall surface of the slot, and a winding is wound between slots formed by the inner wall surface of the insertion part. In the insulator structure for a stator core formed as described above, a wall portion for fixing a crossover bridging between the wound portions is provided on the outer peripheral side of the wound portion. Further, a crossover wire retaining projection is provided on the outer surface of the wall to prevent the crossover wire from coming off.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing a stator core insulator structure of the present invention mounted on a stator core of a motor such as a stepping motor, FIG. 2 is a plan view of FIG.
Is a cross-sectional view taken along the line BB of FIG. 2, and FIG. 4 is a partial cross-sectional view showing a state where the stator core is assembled. 1 to 4, an insulator 1 is provided with a slot 6 of a stator core.
A plurality of (in the illustrated example, ten) wound portions 2 around which a coil winding for a stator (described later) is wound are provided. The wound portion 2 is formed by the outer surface side of the stator core slot insertion portion 4 that covers and insulates the surface of the slot 6 of the stator core. On the outer diameter side of these wound portions 2, a plurality of crossover wire fixing walls 3, which are arranged to connect adjacent wound portions 2, are provided with a predetermined gap therebetween. These crossover wall portions 3 prevent the winding from being detached to the outer diameter side of the wound portion 2. On the inner diameter side of the wound portion 2, a stopper wall 5 for preventing the wound winding from being detached to the inner diameter side is erected in the axial direction of the insulator 1 in a ring shape. It is provided so as to close the gap between the parts 3.

The insertion portion 4 in the stator core slot is provided with a slit 4a for passing a winding on the inner diameter side, and the slot 6 for winding the winding by the inner surface of the insertion portion 4 in the stator core slot. Is formed. Each of the corners 7 of the slot 6 is set to be equal to or less than の of the wire diameter of the winding wound around the wound part 2 when the slots 6 are viewed from a plane. As shown in FIG. 5, the side surfaces of these wound portions 2 are provided with tapered portions 8 in the radial direction of the insulator 1 in plan view, and these tapered portions 8 gradually increase from the inner diameter side to the outer diameter side. It is formed to be thin. At the upper left and right ends on the back side of the crossover wall 3, protrusions 9 for preventing crossovers are provided outward, respectively. Prevents withdrawal.

Next, the operation of the present invention having the above configuration will be described. As shown in FIG. 4, the pair of insulators 1 are assembled such that the stator core slot insertion portions 4 are inserted into the stator core slots from both sides of the stator core 11 of the motor. Next, when the winding 10 is wound around the wound portion 2 formed by the pair of insulators 1, the winding 10 is formed by the taper 8 on the side surface of the wound portion 2. While being urged toward the inner side, it is wound from the end on the far side, and is sequentially arranged from the outer diameter side to the inner diameter side (see FIG. 6). Since each corner 7 of the slot 6 is set to be equal to or less than の of the wire diameter of the winding wound around the wound part 2,
The windings 10 are densely arranged from the outer diameter side corner 7 (see FIG. 7).

At this time, since the fixing pin is not provided in the slot 6 as in the prior art, the nozzle reaches the inside of the slot 6 (see FIG. 8), and the nozzle is wound around the wound portion 2 without a gap. A line will be created. Further, since the connecting wire wall portion 3 is provided outside the slot 6, the coil wire 10a at the time of winding does not protrude to the outer diameter side of the slot 6 (see FIG. 9). Is wrapped neatly without collapse.

On the other hand, the connecting wire fixing wall portion 3 is
Is provided outside, so that the entire supporting portion of the crossover 10b can be maximized, so that the force applied during the crossover processing can be dispersed and the strength can be improved. Crossover processing with thick lines becomes possible. In addition, by making the wall shape, the crossover 10b and the coil 10a
As shown in FIG. 10, the crossover 10b crosses without passing over the wound part 2, so that the coil end 10
Regardless of the height of c, it can cross at a position lower than the coil end 10c. At this time, since the protrusion 9 is provided on the crossover wall 3, the crossover 10 b does not come off from the crossover wall 3.

The present invention is not limited to the above-described embodiment. For example, the number of the protrusions 9 for preventing the separation of the crossover 10b may be appropriately set. It is needless to say that the present invention can be carried out by appropriately changing it within a range not changing.

[0018]

As described above, according to the insulator structure for a stator core of a motor according to the present invention, the following effects can be obtained. 2. The winding part according to claim 1, wherein an insertion part is inserted into each slot of the stator core of the motor to cover an inner wall surface of the slot, and a winding is wound between the slot parts formed by the inner wall surface of the insertion part. In the formed stator core insulator structure, the corners of the slots provided between the wound portions are set to be equal to or less than half the wire diameter of the winding wound on the wound portion. Can be wound up to the corner. Therefore, the occupying rate can be improved without damaging the coil wire during winding. In the second aspect, the side face of the wound portion is tapered in the radial direction, so that the winding is densely wound from the back side of the wound portion. According to claim 3, since a connecting wire fixing wall portion provided between the wound portions is provided on the outer peripheral side of the wound portion, the connecting pin can be eliminated from within the slot. The effective area increases, the nozzle control range can be increased, and the winding can be wound neatly from the back of the wound portion. In addition, since winding disturbance to the outer diameter side can be prevented, the winding can be wound neatly. Furthermore, since the crossover wire fixing wall portion is provided, there is no possibility that the wall portion falls down in the slot, so that a thick wire winding can be used. In the fourth aspect, since the crossover wire retaining projection is provided on the outer surface of the wall portion, the length of the crossover support portion can be reduced, so that the overall motor length can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an insulator structure for a stator core of a motor according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 2;

FIG. 4 is a partial cross-sectional view showing the insulator assembled to a stator core.

FIG. 5 is a partially enlarged view of FIG. 2;

FIG. 6 is a conceptual sectional view showing a winding order of the insulator of the present invention.

FIG. 7 is a conceptual sectional view showing a winding state of the insulator of the present invention.

FIG. 8 is a conceptual sectional view showing a winding method of the insulator of the present invention.

FIG. 9 is a conceptual sectional view showing a winding state of the insulator of the present invention.

FIG. 10 is a conceptual cross-sectional view showing a state where a crossover wire fixing wall portion of the insulator of the present invention is viewed from the outside.

FIG. 11 is a cutaway perspective view showing the inside of the motor.

FIG. 12 is a perspective view showing an insulator structure for a stator core of a conventional motor.

FIG. 13 is a plan view of FIG.

FIG. 14 is a sectional view taken along line AA of FIG.

FIG. 15 is a partially enlarged view of FIG.

FIG. 16 is a conceptual sectional view showing a winding state of a conventional insulator.

FIG. 17 is a conceptual sectional view showing a winding state of a conventional insulator.

FIG. 18 is a conceptual sectional view showing a conventional insulator winding method.

FIG. 19 is a conceptual sectional view showing a winding state of a conventional insulator.

FIG. 20 is a conceptual cross-sectional view showing a state when viewed from the outside of a fixing pin of a conventional insulator.

FIG. 21 is a conceptual sectional view showing a winding state of a conventional insulator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulator 2 Winding part 3 Crossover wire fixing wall 4 Stator core slot insertion part 5 Stopper wall 6 Slot 7 Corner 8 Taper 9 Crossover wire retaining projection 10 Winding

Claims (4)

[Claims] An insertion part is inserted into each slot of a stator core of a motor to cover an inner wall surface of the slot, and a wound part which winds a coil between slots formed by the inner wall surface of the insertion part is provided. The insulator structure for a stator core of a motor according to the formed stator core insulator, wherein each corner of the slot portion is set to a half or less of a wire diameter of a winding wound around a wound portion. 2. A winding part which inserts an insertion part into each slot of a stator core of a motor to cover an inner wall surface of the slot and winds a winding between the slot parts formed by the inner wall surface side of the insertion part. The insulator structure for a stator core of a motor according to the formed stator core insulator structure, wherein a side surface of the wound portion is tapered in a radial direction. 3. A winding portion which inserts an insertion portion into each slot of a stator core of a motor to cover an inner wall surface of the slot and winds a winding between slots formed by the inner wall surface side of the insertion portion. The insulator structure for a stator core of a motor according to the formed stator core structure, further comprising a connecting wire fixing wall portion provided between the wound portions on an outer peripheral side of the wound portion. . 4. The insulator structure for a stator core of a motor according to claim 3, wherein a connecting wire retaining projection is provided on an outer surface of the connecting wire fixing wall portion.