JPH0739258U - Armature for magnet generator - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an armature for a magnet generator capable of preventing foreign matter such as water and dust from entering the gap between the collar of the bobbin and the armature coil to be protected. [Structure] The armature core 1 has coil winding portions 1a to 1d provided with collared bobbins 2A to 2D. Bobbin with collar 2
Armature coils 3A to 3D are wound around A to 2D. An insulating tape layer 4 is provided to cover the armature coil 3A to be protected. The insulating tape layer 4 is supported by straddling both the collars 2b and 2c of the collared bobbin 2A.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an armature for a magnet generator, in which a bobbin with a collar is provided on a coil winding portion of an armature core, and an armature coil is wound around the bobbin with the collar.

[0002]

[Prior art]

 FIG. 5 and FIG. 6 show the structure of a conventional armature for a magnet generator of this type. This armature for a magnet generator includes an armature core 1 having four coil winding portions 1a, 1b, 1c, 1d at 90 ° intervals, and the armature core 1 is formed by laminating a plurality of core plates. Is configured. The coil winding portions 1a, 1b, 1c and 1d are provided with flanged bobbins 2A, 2B, 2C and 2D, respectively. The collared bobbins 2A, 2B, 2C and 2D are made of resin molded products in which the collars 2b and 2c are provided at both ends of the winding drum 2a. Armature coils 3A, 3B, 3C and 3D are wound around the winding cylinder 2a between the collars 2b and 2c of the bobbins 2A, 2B, 2C and 2D with flanges, respectively. The armature coil 3A is an exciter coil of the CDI method or the like, and is composed of a thin copper wire of about φ0.10 mm to φ0.25 mm. The armature coils 3B, 3C, 3D are coils for lamp lighting and battery charging, and are made of thick copper wire. An insulating tape layer 4 is provided on the outer circumference of the armature coil 3A made of a thin copper wire for protection. The insulating tape layer 4 is made of a cloth tape such as tetrafluoroethylene tape or a prepreg tape.

Such an armature for a magnet generator is adapted to be attached to an internal combustion engine or the like by a bolt (not shown) inserted through a mounting hole 5a penetrating the armature core 1. In addition, 5b is a rotary shaft through hole provided so as to penetrate through the center of the armature core 1.

[0004]

[Problems to be solved by the device]

 Since such an armature for a magnet generator is attached to an internal combustion engine or the like as described above, vibrations from the internal combustion engine or the like are directly transmitted. Further, heat may be transferred from the internal combustion engine, the temperature may rise due to self-heating of the armature core 1 and the armature coils 3A, 3B, 3C, 3D, or the temperature may drop when the internal combustion engine is stopped. Therefore, a heat cycle will be added.

Due to these vibrations and heat cycles, gaps are formed between the collars 2b and 2c of the collared bobbin 2 and the armature coils 3A, 3B, 3C and 3D, and between the collars 2b and 2c and the insulating tape layer 4. Occur.

A place where an internal combustion engine or the like is installed is generally a place covered with a cover or the like, but water, dust, or the like may enter. In addition, it is common for motorcycles such as scooters to adopt a forced air cooling system by attaching a fan to the flywheel of a magnet generator and sending the air taken in from the outside to the cooling fins of the engine. In the structure, foreign matters such as water and dust around the road enter the periphery of the armature for the magnet generator. In such a case, if there is a gap between the collars 2b, 2c of the bobbin 2 and the armature coils 3A, 3B, 3C, 3D and between the collars 2b, 2c and the insulating tape layer 4, these gaps Foreign matter such as water or dust enters and adheres to the copper wires forming the armature coils 3A, 3B, 3C, 3D. Since an induced electromotive force is generated in this copper wire, the enamel film of the copper wire is destroyed by electrolytic corrosion due to the presence of foreign matter, and eventually the copper is ionized, resulting in an armature coil composed of a thin copper wire. In the case of 3A etc., it may lead to disconnection.

An object of the present invention is to provide an armature for a magnet generator capable of preventing foreign matter such as water or dust from entering the gap between the collar of the bobbin and the armature coil to be protected. It is in.

[0008]

[Means for Solving the Problems]

 To explain the configuration of the present invention that achieves the above object, the present invention provides a bobbin with a collar at the coil winding portion of the armature core, and an armature coil is wound around the bobbin with the collar to protect the armature coil. The armature coil to be covered is provided with an insulating tape layer covering the armature coil. In the armature for a magneto generator, the insulating tape layer is supported across both the collars of the collared bobbin. Characterize.

[0009]

[Action]

 In this way, if the insulating tape layer is supported across both the collars of the collared bobbin around which the armature coil to be protected is wound, even if a heat cycle is applied, the gap between the collar and the insulating tape layer is There is no gap in the area. For this reason, foreign matter such as water and dust does not enter the gap between the collar of the bobbin and the armature coil. Therefore, it is possible to prevent disconnection of the copper wire of the armature coil due to electrolytic corrosion in the presence of foreign matter.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The parts corresponding to those in FIGS. 5 and 6 described above are designated by the same reference numerals.

1 and 2 show a first embodiment of an armature for a magnet generator according to the present invention. In the armature for a magneto-generator of the present embodiment, the insulating tape layer 4 provided on the bobbin 2A with the brim around which the armature coil 3A to be protected is wound is provided so as to cover the armature coil 3A. The bobbin 2A with the collar extends over both the collars 2b and 2c and covers the outer peripheries of the collars 2b and 2c including the outer peripheral surfaces thereof.

When the insulating tape layer 4 is supported by the collared bobbin 2A as described above, no gap is generated between the collars 2b and 2c and the insulating tape layer 4 even if a heat cycle is applied. Therefore, foreign matter such as water and dust does not enter the gap between the armature coil 3A and the collars 2b and 2c of the bobbin 2A with a collar. Therefore, it is possible to prevent the thin copper wire of the armature coil 3A from being broken due to electrolytic corrosion in the presence of foreign matter.

FIG. 3 shows a second embodiment of the armature for a magnet generator according to the present invention. In the armature for a magneto-generator of this embodiment, the stepped portion is formed by lowering it on the outer surface of the outer circumferences of the collars 2b and 2c of the collared bobbin 2A around which the armature coil 3A to be protected is wound. 2d is provided, and the insulating tape layer 4 provided so as to cover the armature coil 3A is provided such that both ends in the width direction thereof are locked to these step portions 2d.

With this configuration, the amount of the insulating tape layer 4 protruding to the outer surface of both the collars 2b and 2c of the collared bobbin 2A is reduced, and the space can be saved.

FIG. 4 shows a third embodiment of the armature for a magnet generator according to the present invention. In the armature for a magneto-generator of this embodiment, the armature coil 3A to be protected is wound on the collared bobbin 2A, and the armature coil 3A to be protected is wound on the collared bobbin. Steps 2e are provided on the inner surfaces of the outer peripheries of both collars 2b, 2c of 2A by lowering them, and the insulating tape layer 4 provided so as to cover the armature coil 3A has both ends in the width direction of these steps. 2e is locked and provided.

In this way, the insulating tape layer 4 does not protrude from the bobbin 2A with the collar, and the space can be further saved as compared with the second embodiment.

The insulating tape layer 4 used in each example may be the above-mentioned prepreg tape or the like, but if it is formed by using a heat-shrinkable tube, the armature coil 3A can be more reliably protected from foreign matter.

The insulating tape layer 4 can be similarly provided on the other bobbins 2B to 2D with flanges, if necessary.

[0019]

[Effect of device]

 As described above, in the armature for the magnet generator according to the present invention, the insulating tape layer is supported across both the collars of the collared bobbin around which the armature coil is wound for protection. Since there is no gap between the collar and the insulating tape layer even when the heat cycle is applied, foreign matter such as water or dust enters the gap between the collar of the bobbin and the armature coil. Can be prevented. Therefore, according to the present invention, it is possible to reliably prevent disconnection of the copper wire of the armature coil due to electrolytic corrosion in the presence of foreign matter.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of an armature for a magnet generator according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a sectional view of an essential part of a second embodiment of the armature for a magnet generator according to the present invention.

FIG. 4 is a cross-sectional view of an essential part of a third embodiment of the armature for a magnet generator according to the present invention.

FIG. 5 is a front view of a conventional armature for a magnet generator.

6 is a cross-sectional view taken along the line YY of FIG.

[Explanation of symbols]

 1 Armature iron core 1a, 1b, 1c, 1d Coil winding part 2A, 2B, 2C, 2D Collar bobbin 2a Winding drum 2b, 2c Collar 2d, 2e Step part 3A, 3B, 3C, 3D Armature coil 4 Insulating tape layer

Claims (1)

[Scope of utility model registration request] 1. A bobbin with a collar is provided on a coil winding portion of an armature core, and an armature coil is wound around the bobbin with the collar. An armature coil to be protected is covered with an insulating tape layer. An armature for a magnet generator, wherein the insulating tape layer is supported across both the collars of the collared bobbin.