JP2001008417A - Manufacture of stator for motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance productivity by enabling putting stator windings in winding grooves with an automatic winding machine, even in the case of a skewed stator. SOLUTION: In this manufacturing method of a stator for a motor by putting stator windings 5 in the winding laying grooves 2 of a laminated stator core 1, a plurality of stator sheets has a plurality of winding grooves 2 in its internal periphery, and provided with protrusions 3 cut into a V shape. The periphery of the stator core 1 has recessed grooves 6 stretching in the axial direction. The winding grooves 2 are skewed, by inserting a locking device which is skewed beforehand into the recessed grooves 6 after the stator windings 5 are put in the winding grooves 2, and inclining the stator core 1 in the axial direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a stator of a motor in which a winding accommodating groove is skewed.

[0002]

2. Description of the Related Art A conventional stator for a motor in which a winding housing groove has no skew has been manufactured by a method shown in FIGS. A stator plate having a plurality of winding accommodating grooves 21 on an inner periphery thereof and a stator plate provided with a caulking protrusion 22 cut in a V-shape, and a caulking protrusion 22 of the stator plate in which the caulking protrusions 22 are overlapped. , The stator core 20 is formed. This stator core 20 is attached to an automatic winding machine 23,
The blade 25 of the automatic winding machine 23 to which the stator winding 24 is attached is moved in the axial direction, and the blade 25 of the automatic winding machine 23 is inserted into the winding accommodating groove 21 of the stator core 20.
The stripper 26 of the automatic winding machine 23 is moved in the axial direction to remove the stator winding 24 of the blade 25, the stator winding 24 is stored in the winding storage groove 21, and the blade 25 and the stripper 26 are retracted. Thus, the stator winding 24 is housed in the winding housing groove 21.

[0003]

However, if the stator winding groove 21 is skewed, when the stator winding 24 is housed in the winding housing groove 21 of the stator core 20 by the automatic winding machine 23, , The blade 25 of the automatic winding machine 23 is
In this case, the stator winding 24 cannot be housed in the winding housing groove 21 because the peripheral wall of the winding housing groove 21 is zero. Therefore, there is a problem in that the winding accommodating operation must be performed manually, which is very troublesome and lowers productivity. The present invention has been made in order to solve such a problem, and even in a stator with a skew, productivity of an automatic winding machine in which stator windings can be stored in winding storing grooves. It is an object of the present invention to provide a method for manufacturing a high motor stator.

[0004]

In order to solve the above-mentioned problems, the present invention provides a plurality of stator plates having a plurality of winding accommodating grooves on an inner periphery and having V-shaped cutouts. A stator manufacturing method for an electric motor in which stator windings are housed in winding storage grooves of a stacked stator core, wherein the stator core has a concave groove extending in an axial direction on an outer periphery of the stator core, and the winding is wound around the winding housing groove. After the wire is housed, the stator core is inclined in the axial direction while inserting a locking tool having a skew formed in advance into the concave groove to form a skew in the winding housing groove.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a stator core, and FIG. 2 is a side view when a skew is formed in the stator core into which a stator winding is inserted. In the figure, reference numeral 1 designates a stator core, which is not shown, and is formed by laminating a stator plate obtained by punching out a winding accommodating groove 2 on the inner periphery and a plurality of V-shaped projections 3 on the outer periphery from a thin iron plate. is there. Reference numeral 4 denotes a hole connected to the projection 3. Reference numeral 5 denotes a stator winding housed in the winding housing groove 2 of the stator core 1. Reference numeral 6 denotes a concave groove provided on the outer peripheral surface of the stator plate. Reference numeral 7 denotes a mold having a diameter equal to the outer diameter of the stator plate, and has a projection-shaped locking member 8 which is inclined in the axial direction on the inner peripheral surface. 9 is a press jig. When a stator plate is laminated by punching out the winding accommodating groove 2 and the projection 3 integrally from a thin iron plate by a not-shown type, the projection 3 of the stator plate is engaged with the projection 3 of another stator plate overlapping. Together, the stator plate becomes the stator core 1 in a semi-crimped state. The winding accommodating groove 2 of the stator core 1 in the semi-crimped state is linear in the axial direction. The stator core 1 in the semi-crimped state is mounted on an automatic winding machine (not shown), and the blade of the automatic winding machine on which the stator winding 5 is mounted is stored in the winding of the stator core 1 in the semi-crimped state. When the blade is inserted into the groove 2, the blade can be inserted without contacting the peripheral wall of the winding storage groove 2. The stator winding 5 is inserted into the winding accommodating groove 2, the stator winding 5 is removed from the blade by a stripper (not shown), and the stator is inserted into the winding accommodating groove 2 of the stator core 1 in a semi-crimped state. The winding 5 is housed, and the blade and the stripper are retracted and wound. Thus, the stator winding 5
When the stator core 1 in a semi-crimped state, on which is wound, is mounted on the mold frame 7, the concave groove 6 of the stator core 1 in the semi-crimped state is engaged with the locking tool 8 of the mold frame 7. In this state, when the press jig 9 is applied to the stator core 1 and the end face of the stator core 1 in the semi-crimped state is pressed, the groove 6 of the stator core 1 in the semi-crimped state is engaged with the mold 7. The stator winding groove 2 of the stator core 1 is skewed down along the stopper 8 below the formwork 7. The stator core 1 is firmly fixed by engaging with a groove of a protrusion of another stator plate on which the protrusion 3 of the stator core 1 overlaps. In the figure, the concave groove 6 provided in the stator core 1 is engaged with the locking tool 8 of the mold frame 7, and the stator core 1 is pressed by the press jig 9 to skew the winding accommodating groove 2 in the axial direction. However, the locking housing 8 may be engaged with the concave groove 6 to skew the winding housing groove 2 without using the formwork 7.

[0006]

As described above, according to the present invention, the stator winding can be housed in the straight winding housing groove before the skew is formed in the stator core. Can be inserted into the stator core by an automatic winding machine, so that the stator manufacturing operation can be simplified and the productivity can be improved.

[Brief description of the drawings]

FIG. 1 is a plan view of a stator core according to an embodiment of the present invention.

FIG. 2 is a side view when a skew is formed in a stator core into which a stator winding is inserted.

FIG. 3 shows a prior art, and is a manufacturing drawing when a stator winding is inserted into a stator core.

FIG. 4 is a sectional view of a main part of a stator core when a winding is inserted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator iron core, 2 Winding accommodation groove, 3 Projection, 4 hole, 5 Stator winding, 6 Concave groove, 7 Formwork, 8 Locking tool

Continuation of the front page (72) Inventor Koichi Tomita 2-1 Kurosaki Castle Stone, Yawatanishi-ku, Kitakyushu-shi, Fukuoka F-term (reference) 5Y615 AA01 BB01 PP01 PP09 QQ13 QQ18 SS03 SS05 SS10 SS19 TT13

Claims (3)

[Claims] 1. A stator winding having a plurality of winding accommodating grooves on an inner periphery thereof and a plurality of stator plates each having a V-shaped notch and having a plurality of stacked stator plates. In the method of manufacturing a stator for an electric motor, the stator core has a concave groove extending in an axial direction on an outer periphery of the stator core, and after the winding is stored in the winding storing groove, a skew is formed in the concave groove in advance. A stator skew is formed in the winding accommodating groove by inclining the stator core in the axial direction while inserting the locking tool. 2. A skew is formed in the stator core in a state in which a stator plate punched from a thin plate is laminated and a projection of the stator plate is engaged with a projection of another stator plate overlapping with the stator plate. The method for manufacturing a stator for an electric motor according to claim 1, wherein: 3. A mold having an inner diameter equal to the outer diameter of the stator core and having a projection-like engaging member which is inclined in the axial direction on a peripheral surface of the inner diameter. 3. The stator manufacture for an electric motor according to claim 1, wherein a skew is formed in the winding accommodating groove by inclining the stator core in the axial direction by inserting the stator core in a swaged state. Method.