JP3298616B2 - Winding method of stator for electric motor - 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 winding method for an electric motor in which a plurality of teeth-shaped stator cores are assembled in an annular shape and the stator cores are wound to form a stator.

[0002]

2. Description of the Related Art Conventionally, a stator for an electric motor has a plurality of radially-directed projections formed on an inner peripheral surface of a substantially cylindrical body, and a conductor is wound around grooves of the projections. For this reason, there was a problem that the operation of winding the conductor was extremely complicated.

Therefore, as disclosed in Japanese Patent Application Laid-Open No. 7-163070, a plurality of divided stator cores are prepared, and a conductor wire is wound around each stator core. Methods for manufacturing a stator are known.

[0004]

The stator employs a concentrated winding coil system in which a conductor is wound for each stator core as described above, and a lap winding coil system in which a conductor is wound over a plurality of stator cores. I have. However, it is difficult to use the above-mentioned conventional technology in this type of lap winding coil system.

[0005] For this reason, generally, an operation of integrally forming an open stator and applying a lap winding coil thereto is performed. However, it has been pointed out that the yield rate of the material in the press punching process for integrally forming the open stator is low, which is extremely uneconomical.

[0006] In addition, usually, an insulator (insulator) is interposed between the stator core and the coil to prevent them from being electrically connected. Therefore, there is a problem that the operation of winding the conductive wire with the insulator interposed therebetween is considerably complicated, and the productivity is extremely low.

SUMMARY OF THE INVENTION The present invention solves this kind of problem, and allows a plurality of divided stator cores to be wound quickly and easily with an insulator interposed therebetween, thereby achieving an efficient winding operation. An object of the present invention is to provide a method for winding a stator for a motor that is possible.

[0008]

In order to solve the above-mentioned problems, a method for winding a stator for an electric motor according to the present invention comprises:
First, the holding jig is detachably attached to the circular outer periphery of the core jig.
After mounting, the holding jig holds the stator core jig corresponding to the shape of the stator core , and then an insulator is interposed between the stator core jigs. Then, from the winding opening provided on the inner surface side of the insulator ,
Also, straddling the adjacent stator core jig and holding the
After the jig, the insulator, and the stator core jig are wound, the stator core jig is removed,
Formed by the holding jig and the insulator
The stator core is sequentially mounted in the opening . further,
The holding jig and the core jig are removed from the winding.

[0009] Thus, by simply exchanging the plurality of divided stator cores with the stator core jig, it is possible to perform winding particularly across the plurality of stator cores.
With the insulator interposed, the entire winding operation is easily and quickly performed.

[0010]

FIG. 1 shows a stator 1 obtained by an electric motor winding method according to an embodiment of the present invention.
FIG. The stator 10 has an outer ring 1
A plurality of teeth-shaped divided stator cores 14 are arranged and held in an annular shape in the coil 2, a plurality of winding coils 16 wound around a predetermined number of the stator cores 14, respectively, and the winding coils 16 are wound. Commutator member 1 to be wired
8 and an insulator 19 interposed between the stator core 14 and the winding coil 16.

The stator core 14 is formed by laminating a predetermined number of plates made of an iron-based material having the same shape and elasticity, or is integrally formed by casting with an iron-based material.
The stator core 14 is formed in a substantially T-shape having a head portion 20 and a leg portion 22. At one end in the circumferential direction of the head portion 20, a concave portion 24 formed of an arc-shaped space is provided. An arc-shaped convex portion 26 is provided at the other end (see FIG. 2). The commutator member 18 is formed in a ring shape,
At its outer peripheral portion, winding locking pins 28 are provided at equal angular intervals.

As shown in FIG. 3, the insulator 19
Has a U-shaped vertical cross-section and is generally formed in a substantially U-shape. Specifically, U-shaped horizontal planes 30a and 30b are provided in parallel with each other vertically, and the horizontal plane 3
A U-shaped vertical surface 32 is integrally formed between Oa and 30b. The outer surface 32a of the vertical surface 32 is held in contact with a stator core jig described later, and the inner surface 32b has
A winding opening 34 is provided. At the end of the vertical surface 32,
The bending projections 36a and 36b are formed.

FIG. 4 is a partially exploded perspective view of a winding device 40 for carrying out the winding method. Winding device 40
Are a core jig 42 having a circular outer periphery, a plate-shaped stator core jig 44 set in a shape corresponding to the stator core 14, and a stator jig 42 which is detachably mounted on the outer periphery of the core jig 42. And a holding jig 46 for holding the tool 44.

The core jig 42 is set in a substantially cylindrical shape, and protrudes from an outer peripheral surface 48 of the core jig 42 by a predetermined length in a radial direction (direction of arrow A) at equal angular intervals and in an axial direction ( A plate-like projection 50 extending in the direction of arrow B) is formed. The radial length of the projection 50 is set corresponding to the length from the end of the leg 22 of the stator core 14 to the portion where the winding is applied.

On the outer peripheral surface 48 of the core jig 42, holes 52a and 52b are formed between the projections 50 and are spaced apart in the axial direction in accordance with the dimension of the stator core 14 in the thickness direction. The outer diameter of one end 42 a of the core jig 42 is set so as to be fitted to the commutator member 18.

The holding jig 46 has a hole 52 of the core jig 42.
a, a plurality of sets of pin members 5 detachably attached to 52b
4a and 54b. As shown in FIG.
4a and 54b are arc-shaped concave portions 55 for engaging the horizontal surfaces 30a and 30b of the insulator 19 on both diametrical sides.
a and 55b.

The stator core jig 44 includes the stator core 1
4 is formed in a substantially rectangular shape corresponding to the shape of the leg portion 22, and the pair of pin members 54a, 54a
Positioning recesses 56a, 56b with which b engages are provided.

Next, the winding device 40 thus configured
The winding method according to the present embodiment for obtaining the stator 10 using the above will be described.

First, as shown in FIG. 6, one end 42a of the core jig 42 is fitted to the commutator member 18, and the commutator member 18 is attached to the core jig 42. On the other hand, each hole 52a, 52 formed in the outer peripheral surface 48 of the core jig 42
b, each pin member 54a, 54 constituting the holding jig 46
After the end of the pin members 54a, 54b
The stator jig 44 held by the core jig 42
(See FIG. 7).

Next, as shown in FIG. 8, the insulator 19 is interposed between the stator core jigs 44. At this time, the insulator 19 has the outer surface 32a of the vertical surface 32 held in contact with the side surface of the adjacent stator core jig 44, and the inner surface 32b is provided with the winding opening 34, and the bending projection 36a, 36b protrudes outward.

As shown in FIG. 9, the stator core jig 44 and the pin members 54a and 54b are wound integrally with each other through the winding opening 34 of the insulator 19, so that the periphery of the core jig 42 The coil 16 is formed. Here, a winding is applied to the locking pin 28 provided on the commutator member 18. The core jig 42 is provided with a plurality of projections 50 protruding in the radial direction, and the stator core jig 44 is provided with a winding by the length of the projection 50 in the radial direction. Absent. Stator core 14
This is because a non-winding portion is provided on the leg portion 22 of FIG.

After the winding operation is completed, the stator core jig 44 is removed from the core jig 42. When the stator core jig 44 is removed, as shown in FIG. 10, the winding coil 16, the pin members 54a and 54b, and the insulator 1
9 form an opening 58 into which the stator core 14 is inserted. Specifically, the stator core 1
4 are sequentially inserted into the openings 58, and the projections 26 provided on the head 20 of the other stator core 14 are fitted into the recesses 24 provided on the head 20 of the one stator core 14. Combine. As a result, as shown in FIG. 11, each stator core 14 is arranged in an annular shape.

Further, the pin member 54 is moved from the core jig 42 to the pin member 54.
After the a and b are extracted, the outer diameter ring 12 is attached to the outer periphery of the stator core 14 (see FIG. 12). Then, the stator 10 is obtained by removing the core jig 42 from the winding coil 16.

In this case, in this embodiment, first, the insulator 19 is interposed between the stator core jigs 44 in a state where the stator core jigs 44 are mounted on the core jigs 42 via the holding jigs 46. . Next, after winding is performed on the stator core jig 44 and the holding jig 46 to form the winding coil 16, the stator core 14 is replaced with the stator core jig 44 and the opening 58 of the winding coil 16 is formed.
Attached to.

At this time, it is ensured that the bending projections 36a and 36b of the insulator 19 are bent in a direction approaching (inward) to each other, and that the head 20 of the stator core 14 and the winding coil 16 are electrically connected. Can be blocked.

By simply inserting a plurality of split stator cores 14 into the respective openings 58, the winding coils 16
Can be wound over a predetermined number of stator cores 14. As a result, in the present embodiment, it is possible to effectively prevent a decrease in the yield of the material as in the case where the conventional open stator is integrally formed, and to obtain an effect of being extremely economical.

Moreover, the insulator 1 can be provided only by interposing the insulator 19 between the stator core jigs 44.
9 can be interposed between the stator core 14 and the winding coil 16. Therefore, there is an advantage that the productivity of the stator 10 having the insulator 19 is improved at once, and that the entire winding operation is easily and quickly performed.

In this embodiment, the insulator 1
Although the bending projections 36a and 36b are provided on the reference numeral 9, one bending projection 36a may be configured to be long and the other bending projection 36b may be unnecessary.

[0029]

As described above, in the method for winding a stator for an electric motor according to the present invention, after an insulator is interposed between stator core jigs mounted on a core jig via a holding jig, this method is performed. The winding is applied to the stator core jig. Next, the stator core is replaced with the stator core jig and attached to the winding. For this reason, the winding can be applied particularly across the plurality of stator cores simply by replacing the plurality of divided stator cores with the stator core jig. In addition, the entire winding work of the stator core via the insulator can be easily and quickly performed.

[Brief description of the drawings]

FIG. 1 is a perspective explanatory view of a stator to which a winding method for a motor stator according to an embodiment of the present invention is applied.

FIG. 2 is a partial plan view of the stator.

FIG. 3 is an explanatory perspective view of an insulator constituting the stator.

FIG. 4 is a partially exploded perspective view illustrating a winding device for performing the winding method.

FIG. 5 is a partial perspective view of the insulator and the stator core jig.

FIG. 6 is an explanatory perspective view showing a state in which a holding jig is mounted on a core jig constituting the winding device.

FIG. 7 is an explanatory perspective view of a state where the stator core jig is mounted on the core jig.

FIG. 8 is a perspective explanatory view when the insulator is interposed between the stator core jigs.

FIG. 9 is a perspective explanatory view when winding is performed on the core jig via the holding jig and the stator core jig.

FIG. 10 is a perspective explanatory view when a stator core is mounted on the windings instead of the stator core jig.

FIG. 11 is a perspective view illustrating a state where the stator core is mounted.

FIG. 12 is a perspective explanatory view when the core jig is removed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Stator 12 ... Outer diameter ring 14 ... Stator core 16 ... Winding coil 18 ... Commutator member 19 ... Insulator 20 ... Head 22 ... Leg 30a, 30b ... Horizontal plane 32 ... Vertical plane 34 ... Winding opening 36a, 36b ... Projecting piece for bending 40. Winding device 42. Core jig 44. Stator core jig 46. Holding jigs 54a and 54b.
6a, 56b: recess 58: opening

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-163070 (JP, A) JP-A-9-163690 (JP, A) JP-A-4-108360 (JP, U) U.S. Pat. , A) (58) Field surveyed (Int. Cl. ⁷ , DB name) H02K 15/08 H02K 15/02

Claims (1)

(57) [Claims] 1. A method of winding a stator for an electric motor, comprising: assembling a plurality of stator cores divided into teeth in an annular shape; and winding the stator core to form a stator. removably holding jig is mounted on the outer periphery
A step of holding the stator core jig corresponding to the shape of the stator core by the holding jig; and an outer surface side is held in contact with the stator core jig, and a winding opening is provided on the inner surface side. a step in which a plurality of insulators Ru is interposed between the stator core jig is, across at least adjacent the stator core jig, before
Serial holding jig and said insulator comprising the steps of subjecting the stator core jig and the secondary winding, after the step of performing said winding is finished, remove the previous SL stator jig to said insulator and said holding jig
The stator core is sequentially mounted in the opening formed by
A step of assembling the stator core in an annular shape; and a step of removing the holding jig and the core jig from the winding.