JPH10304615A - Stator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent slack of a crossover and reduce failure such as wire breakage and rareness by forming a plurality of grooves at an insulation provided on the end surface of a back yoke, and setting the outer periphery diameter of the insulation at such a length so that crossover of a coil does not protrude from the groove. SOLUTION: A plurality of grooves 6a are formed at the outer periphery of an insulation 6 for preventing wire breakages. The outer periphery diameter of the insulation 6 is formed into a cylindrical body by bending a stator 4 constituted of a coil 5 wound around all teeth 3 and is set, so that the slackness of the crossover 5a of the coil 5 may not protrude from the groove 6a. At the time of forming the cylindrical stator 4, the crossover 5a will not come off the groove 6a, even if slackness occurs in the crossover 5a due to a difference in the diameter of the stator 4. It is thus possible to reduce a possibility of failures such as wire breakage or rareness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION A coil is wound around a predetermined tooth of a belt-shaped stator core, a crossover wire is wrapped around the end of the coil along a back yoke, and the coil is wound around the next tooth to form a band. The present invention relates to a tubular stator formed by bending a stator after forming the stator.

[0002]

2. Description of the Related Art A conventional method of forming a coil and a method of processing a crossover of a coil will be described with reference to FIGS. FIG. 4 is a front view of a stator illustrating a conventional coil forming method. FIG. 5 is a front view of a stator illustrating a conventional method of processing a crossover of a coil.

In FIG. 4, a stator core 11 includes a back yoke 12 formed in a belt shape and a back yoke 12
And a plurality of teeth 13 extending from one of the side surfaces.

[0004] The stator 14 is provided with a stator core 11.
A coil 15 wound around each of the teeth 13;
An insulator 16 is provided between the coil 15 and the stator core 11 to insulate the coil 15 from the stator core 11.
It is composed of

The insulator 16 is also provided to extend to the end face of the back yoke 12 of the stator core 11, and a groove 1 for accommodating a connecting wire 15a of a coil 15 described later.
6 a is provided on the outer peripheral surface of the insulator 16.

[0006] As a winding method for winding each coil 15 around the teeth 13, first, one end (start of coil winding) of the coil 15 is fixed to an arbitrary position, and the coil 15 is wound by a winding machine 17. 15 is wound around a predetermined tooth 13. When the coil 15 is wound around the tooth 13, the winding machine 17 moves to the tooth 13 on which the coil 15 is wound next while holding the end of the wound coil 15 (end of winding of the coil). And this tooth 13
Is wound around the coil 15. At this time, the connecting wire 15a of the coil 15 is housed in the groove 16a of the insulator 16, and the groove 16a
Is used as a guide to move the winding machine 17.

[0007]

Referring to FIG. 5, as described above, when the connecting wire 15a of the coil 15 is housed in the groove 16a and then the stator 14 is bent to form a cylindrical stator, The crossover line 15a sags due to the difference in diameter of the stator. If the crossover 15a comes out of the groove 16a due to this slack, there is a risk of disconnection or layering.

[0008]

According to the present invention, a plurality of grooves for accommodating a connecting wire are formed on an outer peripheral surface of an insulator provided on an end face of a back yoke, and a belt-shaped stator is provided. The present invention provides a stator, wherein the outer diameter of the insulator is formed to a length such that a crossover of a coil does not protrude from the groove when the insulator is formed into a cylindrical stator.

[0009] Alternatively, the shape of the bottom of the groove of the insulator is formed in an uneven shape, and the connecting wire of the coil is pressed along the surface of the uneven bottom so that the connecting wire of the coil is formed of the insulating material. A stator provided at the bottom of a groove is provided.

[0010]

First, the winding end of the coil wound around a predetermined tooth is moved to the next tooth to be wound while being housed in the groove of the insulator. Also, the outer diameter of the insulator should be such that the stator formed by winding the coil around all the teeth is bent into a cylindrical shape, and then the slack of the crossover of the coil does not protrude from the groove.

Further, the bottom of the groove of the insulator is made uneven,
By increasing the creepage distance at the bottom of the groove and pressing the crossover against the bottom of the groove of the insulator, the slack of the crossover is absorbed by the bottom of the groove.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is a front view of a belt-shaped stator according to the present invention. FIG. 2 is a partial side sectional view of the stator of FIG.
FIG. 3 is a front view of a stator formed by bending the stator of FIG.

In FIG. 1 and FIG.
As with the stator core described in the conventional example, the back yoke 2 includes a belt-shaped back yoke 2 and a plurality of teeth 3 extending from one side surface of the back yoke 2. The stator 4 includes a stator core 1 and teeth 3 of the stator core 1.
And a coil 6 wound around the coil 5 and an insulator 6. Then, the stator 4 is bent to form a cylindrical stator 4.

The insulator 6 is provided between the stator core 1 and the coil 5 to provide electrical insulation and to accommodate the crossover 5a of the coil 5 and prevent disconnection of the crossover 5a. Provided to do.

An insulator 6 provided for preventing breakage of the crossover 5a is provided on an end face of the back yoke 2 of the stator core 1, and a plurality of insulators 6 are provided on an outer peripheral surface of the insulator 6 for preventing breakage. A groove 6a is provided. The outer diameter of the insulator 6 is determined by bending the stator 4 formed by winding the coil 5 around all the teeth 3 to form a tubular shape, and then connecting the coil 5 with the connecting wire 5a.
The outer diameter is set so that the slack does not protrude from the groove 6a.

Then, similarly to the conventional example, the coil 5 is wound around the predetermined teeth 3 by a winding machine (not shown).
When the coil 5 is wound around the tooth 3, the winding machine moves to the tooth 3 where the coil 5 is wound next while holding the end of the coil 5 that has been wound, and The coil 5 is wound. At this time, the connecting wire 5a of the coil 5 is housed in the groove 6a of the insulator 6, and the winding machine is moved using the groove 6a as a guide.

When the stator 4 is bent to form a tubular stator after the crossover wire 5a of the coil 5 is accommodated in the groove 6a, the crossover wire 5a is sagged due to the diameter difference of the stator 4. Even if it occurs, the crossover 5a does not come off the groove 6a.

In FIG. 3, the shape of the bottom of the groove 7a provided in the insulator 7 is formed in an uneven shape. Groove 7
By making the shape of the bottom of a a concave and convex shape, the creepage distance of the bottom of the groove 7a can be lengthened. That is, this groove 7
The connecting wire 8a of the coil 8 is pressed against the bottom of the coil a from the outer peripheral surface side of the stator 9 so that the connecting wire 8a is formed along the unevenness of the bottom of the groove 7a so that the connecting wire 8a is also uneven.
The slack can be absorbed, and the crossover 8a
Is fixed to the bottom of the groove, and even if a slight external pressure is applied to the crossover 8a, the risk of coming off the groove 7a is reduced.

[0019]

According to the present invention, it is possible to prevent the crossover from sagging over the end face of the stator core, and to reduce problems such as disconnection and layering due to the crossover.

[0020]

[Brief description of the drawings]

FIG. 1 is a front view of a belt-shaped stator according to the present invention.

FIG. 2 is a partial sectional side view of the stator of FIG. 1;

FIG. 3 is a front view of a stator formed by bending the stator of FIG. 1;

FIG. 4 is a front view of a stator illustrating a conventional coil forming method.

FIG. 5 is a front view of a stator illustrating a conventional method of processing a crossover of a coil.

[Explanation of symbols]

 1, 11 ... stator core 2, 12 ... back yoke 3, 13 ... teeth 4, 9, 14 ... stator 5, 8, 15 ... coil 6, 7, 16 ... insulator 17 ... winding machine

Claims (2)

[Claims] A coil is wound around predetermined teeth of a belt-shaped stator core, a crossover wire is wrapped around the end of the coil along a back yoke, and the coil is wound around the next tooth to form a band-shaped stator. After the stator is formed, a plurality of grooves for accommodating the crossovers are formed on the outer peripheral surface of the cylindrical stator formed by bending the stator, on the insulator provided on the end face of the back yoke. When the belt-shaped stator is formed into a cylindrical stator, the outer diameter of the insulator is formed so that the crossover of the coil does not protrude from the groove. 2. The method according to claim 2, wherein the bottom of the groove of the insulator is formed in an irregular shape, and the crossover of the coil is pressed along the surface of the bottom of the irregularity so that the crossover of the coil is made of the insulator. A stator fixed to the bottom of a groove.