JP2007028850A - Motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor having a coil end wire connection structure that is low in cost and satisfactory in workability and that can be miniaturized. <P>SOLUTION: In this motor comprising a stator 9 consisting of a stator core 4 and a coil 5 wound on the stator core 4, a board 1, arranged near the end portion in the axial direction of the coil 5, a load-side bracket 10 and an opposite-load-side bracket 11, with each being mounted on the end portion in the axial direction, and a rotor 13 supported rotatably by the load-side bracket 10 and the opposite-load-side bracket 11 via bearings 12, insulators 2, 6 are each interposingly inserted in between the stator core 4 and the coil 5, and between the end portion 14 in the axial direction of the coil 5 and the board 1; and then the coil 5, the insulators 2, 6, and the board 1 are bundled and fixed by an insulating strap 3. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a motor, and more particularly to a coil end connection structure of a motor in which a substrate is disposed at the end of a coil.

FIG. 5 is a side sectional view of a motor in which a substrate is disposed at the coil end in the prior art, and FIG. 6 is a sectional view showing between the stator core and the coil in the prior art (see, for example, Patent Document 1).
5 and 6, the motor includes a resin-molded bobbin 16, a coil 5 wound around the bobbin 16, a stator core 4, a coil 5, a substrate 1, leads 7, a frame 8, and a shaft of the stator 9. The load side bracket 10 and the anti-load side bracket 11 are respectively attached to the direction end portions, and the rotor 13 is rotatably supported by the load side bracket 10 and the anti-load side bracket 11 via a bearing 12.
In addition, the board | substrate 1 which performs the connection process of the coil end 14 of the said coil 5 is arrange | positioned on the bobbin 16 which has a positioning function.
FIG. 7 is a side sectional view of a motor without a substrate in the prior art, and FIG. 8 is an enlarged view of a coil end connection.
7 and 8, the stator 9 includes a stator core 4, a coil 5, an insulator 6 made of insulating paper or a sheet-like insulator disposed between the stator core 4 and the coil 5, leads 7, and a frame 8. Yes.
The coil end 14 of the coil 5 is connected by connecting the coils 5 and insulating the connecting portion with the insulating tape 17 or the like, and then bundling with the insulating cord 3 and fixing.
JP-A-8-47194

Such conventional techniques have the following problems.
(1) Since the coil end connection structure of the motor which arrange | positions a board | substrate at the said coil end uses the bobbin by resin molding, cost is high.
(2) The insulation distance from the stator core cannot be shortened due to constraints on bobbin manufacturing, and heat generated from the coil is difficult to transfer to the stator core.
(3) Since the coil end connection structure of the motor which does not arrange | position a board | substrate at the said coil end connects coils directly, it requires an incorrect wiring and a man-hour.
(4) Since a space for connecting the coils and performing insulation treatment is required, it is difficult to reduce the size in the axial direction.
The present invention has been made to solve such a problem, and an object of the present invention is to provide a motor having a coil end connection structure that is inexpensive, has good workability, and can be miniaturized. .

In order to solve the above problems, the present invention is configured as follows.
The invention according to claim 1 is a stator comprising a stator core and a coil wound around the stator core, a substrate disposed beside the axial end of the coil, a load side bracket attached to the axial end, and In a motor having an anti-load side bracket, and a rotor supported rotatably on the load side bracket and the anti-load side bracket via a bearing, between the stator core and the coil, and an axial end of the coil and the substrate Insulators are interposed between the coils, the insulator, and the substrate with an insulating string, and the bundle is fixed.
The invention described in claim 2 is characterized in that the insulator is an insulating paper or a sheet-like insulator.
According to a third aspect of the present invention, a bundle guide groove is provided in the substrate.

The present invention has the following effects.
According to the first aspect of the present invention, erroneous wiring can be eliminated by using the substrate for the coil end connection processing. In addition, since there are no steps for connecting and insulating the coils, the workability can be improved and the axial size can be reduced.
According to the second aspect of the present invention, the insulator is interposed between the stator core and the coil, and between the axial end of the coil and the substrate, so that the insulation distance from the stator core is reduced. The transmission of heat generated from the coil to the stator core can be improved, and the axial size can be reduced.
According to the invention described in claim 3, by providing the bundle guide groove on the substrate, the substrate can be easily positioned and workability can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a side sectional view showing a motor having a coil end connection structure in a first embodiment of the present invention, and FIG. 2 is an enlarged sectional view showing a space between a stator core and coils in FIG.
1 and 2, the motor includes a stator 9 composed of a stator core 4 and a coil 5 wound around the stator core 4, and a substrate 1 disposed beside the axial end of the coil 5;
A load-side bracket 10 and an anti-load-side bracket 11 that are respectively attached to axial ends, and a rotor 13 that is rotatably supported by the load-side bracket 10 and the anti-load-side bracket 11 via a bearing 12. .
Insulators 2 and 6 made of insulating paper or sheet-like insulators are disposed between the stator core 4 and the coil 5 and between the coil 5 and the substrate 1.
The coil end 14 is connected to the coil end 14 after the insulators 2 and 6 and the substrate 1 are arranged, and then the coil 5, the insulators 2 and 6 and the substrate 1 are fixed with the insulating string 3. I am doing.
The present invention is different from the prior art in that an insulator 6 disposed between the stator core 4 and the coil 5, an insulator 2 disposed between the coil 5 and the substrate 1, the coil 5, and the substrate 1 are insulative strings 3. This is the point where the bundling was performed.

  Thus, by using the insulators 2 and 6, as shown in FIG. 1, the insulation distance of a coil and a board | substrate can be shortened. Moreover, as shown in FIG. 2, the insulation distance 18 between the stator core 4 and the coil 5 can be shortened.

  FIG. 3 is a diagram showing the configuration of the second embodiment, and FIG. 4 is an enlarged view of the substrate. A guide groove 15 is provided on the substrate 1 so that the substrate 1 can be easily positioned when the coil 5, the insulating paper or sheet-like insulator 2, and the substrate 1 are fixed by bundling with the insulating cord 3.

1 is a side sectional view showing a motor having a coil end connection structure in a first embodiment of the present invention. It is an expanded sectional view which shows between the stator core and coil in FIG. It is a front view of the stator which shows the 2nd Example of this invention. It is an enlarged view of the board | substrate in FIG. It is a sectional side view of the motor which arrange | positions a board | substrate in the coil end in a prior art. It is sectional drawing between the stator core and coil in FIG. It is a sectional side view of the motor which does not arrange | position a board | substrate in the coil end in a prior art. It is a coil end enlarged view of the motor which does not arrange | position a board | substrate in the coil end in a prior art.

Explanation of symbols

1 Substrate 2, 6 Insulator (insulating paper or sheet-like insulator)
3 Insulating string 4 Stator core 5 Coil 7 Lead 8 Frame 9 Stator 10 Load side bracket 11 Anti-load side bracket 12 Bearing 13 Rotor 14 Coil end 15 Groove 16 Bobbin 17 Insulating tape 18 Insulating distance

Claims (3)

A stator consisting of a stator core and a coil wound around the stator core;
A substrate disposed beside the axial end of the coil;
A load-side bracket and an anti-load-side bracket attached to the axial ends respectively;
In the motor having a rotor rotatably supported via a bearing on the load side bracket and the anti-load side bracket,
An insulator is interposed between the stator core and the coil, and between the axial end of the coil and the substrate, and the coil, the insulator, and the substrate are fixed together with an insulating string. A motor characterized by   The motor according to claim 1, wherein the insulator is an insulating paper or a sheet-like insulator.   The motor according to claim 1, wherein a bundle guide groove is provided on the substrate.

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