JP3732306B2 - stator - Google Patents

Description

[0001]
[Industrial application fields]
After winding a coil around a predetermined tooth of a band-shaped stator core, wiring a connecting wire along the back yoke at the winding end of this coil and winding the coil on the next tooth to form a band-shaped stator, The present invention relates to a cylindrical stator formed by bending the stator.
[0002]
[Prior art]
A conventional coil forming method and coil crossover method will be described with reference to FIGS. 4 and 5. FIG. FIG. 4 is a front view of a stator illustrating a conventional coil forming method. FIG. 5 is a front view of a stator for explaining a conventional method for processing a coil connecting wire.
[0003]
In FIG. 4, the stator core 11 includes a back yoke 12 formed in a band shape and a plurality of teeth 13 extending from one side surface of the back yoke 12.
[0004]
The stator 14 is provided between the coil 15 wound around each tooth 13 of the stator core 11 and the coil 15 and the stator core 11, and insulates the coil 15 from the stator core 11. It is comprised with the insulator 16 for performing.
[0005]
The insulator 16 is also provided so as to extend to the end surface portion of the back yoke 12 of the stator core 11, and a groove 16 a for accommodating a crossover wire 15 a of the coil 15 described later is formed on the outer peripheral surface of the insulator 16. Is provided.
[0006]
Then, as a winding method for winding each coil 15 around the teeth 13, first, one end of the coil 15 (coil winding start) is fixed at an arbitrary position, and the coil 15 is predetermined by the winding machine 17. Wrap around the teeth 13 When the coil 15 has been wound around the tooth 13, the winding machine 17 moves to the tooth 13 around which the coil 15 is wound while holding the terminal of the coil 15 that has been wound (coil end). Then, the coil 15 is wound around the teeth 13. At this time, the connecting wire 15a of the coil 15 is accommodated in the groove 16a of the insulator 16, and the winding machine 17 is moved using the groove 16a as a guide.
[0007]
[Problems to be solved by the invention]
In FIG. 5, as described above, the crossover wire 15a of the coil 15 is accommodated in the groove 16a, and then the stator 14 is bent to form a cylindrical stator. The sagging will occur. If the crossover wire 15a is detached from the groove 16a due to the slack, there is a risk of disconnection or layering.
[0008]
[Means for Solving the Problems]
According to the present invention, a stator including a substantially straight back yoke, a plurality of teeth protruding in one direction from the back yoke, and a plurality of V-cut grooves formed between the teeth. A core, an insulator formed on the back yoke and teeth of the stator core, and a winding wound around a tooth portion insulated by the insulator, and the stator core is wound after the winding. In the stator formed into a cylindrical shape by bending, a plurality of grooves for storing the crossover wires are formed in parallel to the outer circumferential direction in the insulator formed in the back yoke of the stator core, and the plurality of The groove is formed to a depth that prevents the jumper wire from protruding even if it is formed into a cylindrical shape by winding a belt-shaped stator, and a plurality of jumper wires are formed into a plurality of grooves in a straight line and crossover of other phases. the stator, characterized in that arranged parallel to the line Subjected to.
[0009]
Alternatively, the shape of the bottom of the groove of the insulator is formed in a concavo-convex shape, the connecting wire of the coil is pressed along the surface of the concavo-convex bottom, and the connecting wire of the coil is connected to the bottom of the groove of the insulating material. A stator characterized by being fixed to is provided.
[0010]
[Action]
First, the winding end of the coil wound around the predetermined tooth is moved to the next winding tooth while being housed in the insulating groove. Further, the outer peripheral diameter of the insulator is set to an outer peripheral diameter in which the slack of the connecting wire of the coil does not protrude from the groove after the stator formed by winding the coil around all the teeth is bent into a cylindrical shape.
[0011]
In addition, the bottom of the groove of the insulator is made uneven, the creepage distance of the bottom of the groove is increased, and the crossover is pressed against the bottom of the groove of the insulator to absorb the slack of the crossover into the bottom of the groove. .
[0012]
【Example】
An embodiment according to the present invention will be described with reference to FIGS. FIG. 1 is a front view of a band-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.
[0013]
1 and 2, the stator core 1 includes a belt-like back yoke 2 and a plurality of teeth 3 extending from one side surface of the back yoke 2 in the same manner as the stator core described in the conventional example. It consists of The stator 4 includes a stator core 1, a coil 5 wound around the teeth 3 of the stator core 1, and an insulator 6. Then, the stator 4 is bent to form a cylindrical stator 4.
[0014]
The insulator 6 is provided between the stator core 1 and the coil 5 for electrical insulation, and for accommodating the connecting wire 5a of the coil 5 and for preventing disconnection of the connecting wire 5a. Is provided.
[0015]
The insulator 6 provided for preventing the disconnection of the connecting wire 5a is provided on the end face of the back yoke 2 of the stator core 1, and a plurality of grooves 6a are formed on the outer peripheral surface of the insulator 6 for preventing the disconnection. Is provided. Further, the outer diameter of the insulator 6 is such that after the stator 4 formed by winding the coil 5 around all the teeth 3 is bent into a cylindrical shape, the slack of the connecting wire 5a of the coil 5 protrudes from the groove 6a. Set the outer diameter to a level that does not occur.
[0016]
As in the conventional example, the coil 5 is wound around a predetermined tooth 3 by a winding machine (not shown). When the coil 5 has been wound around the tooth 3, the winding machine moves to the tooth 3 around which the coil 5 is wound while holding the terminal of the coil 5 that has been wound. Wind the coil 5. At this time, the connecting wire 5a of the coil 5 is accommodated in the groove 6a of the insulator 6, and the winding machine is moved using the groove 6a as a guide.
[0017]
And after accommodating the groove | channel 6a in the connecting wire 5a of the coil 5, when the stator 4 is bent and a cylindrical stator is formed, even if slack occurs in the connecting wire 5a due to the difference in the diameter of the stator 4. The connecting wire 5a does not come off the groove 6a.
[0018]
In FIG. 3, the shape of the bottom of the groove 7a provided in the insulator 7 is formed in an uneven shape. By making the shape of the bottom of the groove 7a uneven, the creeping distance of the bottom of the groove 7a can be increased. That is, the connecting wire 8a of the coil 8 is pressed from the outer peripheral surface side of the stator 9 to the bottom of the groove 7a, and the connecting wire 8a is made uneven along the unevenness of the bottom of the groove 7a. Further, the slack of the connecting wire 8a can be absorbed, and the connecting wire 8a is fixed to the bottom of the groove, so that the risk of coming out of the groove 7a is reduced even if some external pressure is applied to the connecting wire 8a.
[0019]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the slack of the crossover wire which crosses the end surface of a stator core can be prevented, and malfunctions, such as a disconnection by the slack of a crossover wire and a layer, can be reduced.
[0020]
[Brief description of the drawings]
FIG. 1 is a front view of a band-shaped stator according to the present invention.
FIG. 2 is a partial side cross-sectional view of the stator of FIG.
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 method for forming a coil.
FIG. 5 is a front view of a stator for explaining a conventional method for processing a connecting wire of a coil.
[Explanation of symbols]
DESCRIPTION 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)

A stator core formed in a belt-like shape, comprising a substantially straight back yoke, a plurality of teeth protruding in one direction from the back yoke, and a plurality of V-cut grooves formed between the teeth;
An insulator formed on the back yoke and teeth of the stator core;
It consists of a winding wound around the teeth part insulated with this insulator,
In the stator formed into a cylindrical shape by winding the stator core after winding,
Forming a plurality of grooves for storing crossovers in the insulator formed in the back yoke of the stator core in parallel to the outer peripheral direction,
In addition, the plurality of grooves are formed to such a depth that the crossover does not protrude even if the belt-shaped stator is wound to form a cylindrical shape.
A stator in which a plurality of connecting wires are arranged in a plurality of grooves in a straight line and in parallel with a connecting wire of another phase. 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 bottom of the uneven shape, and the connecting wire of the coil is fixed to the bottom of the groove of the insulating material. The stator according to claim 1 .

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