JPH05336687A - Field device of magnet motor - Google Patents

Abstract

PURPOSE:To improve an assembly performance of a yoke and a field magnet by a method wherein a recess trench in which adhesive stays is provided in an annular magnet holder which fixes a plurality of field magnets provided on the inner circumference of the yoke with an equal interval and a gradient is so provided as to have the adhesive flow. CONSTITUTION:A magnet holder 20 is provided or the inner circumference of a cylindrical yoke 1. Field magnets 3 are pushed into spaces between protrusions 2c which protrude along an axial direction and are provided radially with equal intervals. The field magnets 3 are held between the magnet holder 20 and another magnet holder 2. In this state, a recess trench 2a provided along the outer circumference of the magnet holder 2 is filled with adhesive. Then the unit is exposed in a high temperature atmosphere with the adhesive filling side, i.e., the magnet holder 2 side, upside and the adhesive 4 is cured while the adhesive is made to penetrate between the yoke 1 and the field magnets 3 through the gap 2b between the yoke 1 and the magnet holder 2. For that purpose, the gap 2b is provided along the outer circumferential direction of the magnet holder 2 only and a gradient 2d is provided so as to have the adhesive flow easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet motor in which a field magnet is fixed with an adhesive.

[0002]

2. Description of the Related Art In the prior art, after fixing a field magnet with a magnet holder, the amount of adhesive required for bonding was measured and poured between the yoke and the field magnet. ..

A device related to this type of device is, for example, Japanese Patent Publication No. 61-33339.

[0004]

In the above-mentioned prior art, the assembling property of the field magnet during bonding is not taken into consideration, and the amount of adhesive required for each must be measured once. Further, when the adhesive is poured after fixing the field magnet with a magnet holder, there is a problem that the adhesive flows into a portion other than between the yoke and the field magnet and the adhesive strength is reduced. It was

An object of the present invention is to improve the assemblability of the yoke and the field magnet.

[0006]

In order to achieve the above object, a groove is provided in a magnet holder, that is, a portion where the adhesive is accumulated, and the amount of the adhesive accumulated is adjusted by the shape of the groove. It has a gradient shape so that the adhesive easily flows between the yoke and the field magnet.

[0007]

The amount of the adhesive that flows between the yoke and the field magnet can be made constant, and the adhesive can be prevented from flowing out to an extra portion.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, an embodiment of the present invention will be described with reference to FIGS.

In FIG. 3, the magnet holder 20 is arranged on the inner peripheral surface of the cylindrical yoke 1, and the field magnet 3 is press-fitted between the axially projecting projections 2c provided at equal intervals in the radial direction. The field magnet 3 is sandwiched by the other magnet holder 2, and the groove 4a provided in the outer circumferential direction of the magnet holder 2 is filled with the adhesive 4 and the side filled with the adhesive, That is, while leaving the magnet holder 2 side up in a high-temperature atmosphere, the adhesive 4 is permeated between the yoke 1 and the field magnet 3 through the gap 2b between the yoke 1 and the magnet holder 2. The adhesive 4 is cured. At this time, as shown in FIG. 2, the gap 2b is provided only in the outer peripheral direction of the magnet holder 2, and the gradient 2d is formed so that the adhesive 4 can easily flow into the gap 2b.

The structure and operation of the starter of this embodiment will be described with reference to FIG.

When a key switch (not shown) is turned on, an electric current is supplied to the magnetic switch 40 of the starter for starting the internal combustion engine, and the pinion 24 is engaged with the crankshaft (not shown) of the internal combustion engine via the shift lever 41. It is pushed up to the side and meshes with the ring gear 25.

Further, when a contact built in the magnetic switch 40 is turned on, a current is supplied to the motor 42 and a torque is generated in the armature 42a to generate a torque in the armature 42a.
The armature shaft 6 in 42a rotates, and the torque is given to the pinion shaft 5 through the reduction gear constituted by the armature gear 6b located in the tip direction of the armature shaft 6, the planetary gear 11 and the internal gear 12. Is transmitted to the pinion 24 via the helical spline 5a and the clutch 22. The torque transmitted to the pinion 24 is transferred to the ring gear 25.
To start the internal combustion engine.

The speed reducer is constructed such that three planetary gears 11 arranged at equal intervals in an annular space formed between the armature gear 6b and the internal gear 12 mesh with each other. The planetary gear 11 revolves around the pinion shaft 5 while rotating about the planetary gear shaft 11a fixed to the pinion shaft collar 2b, and reduces the torque at a predetermined reduction ratio. It is a mechanism to do.

According to this embodiment, there are the following effects.

By using the concave groove 2a provided on the outer circumference of the magnet holder 2 as an adhesive reservoir, the adhesive 4 does not flow into an extra portion.

By filling the concave groove 2a provided on the outer circumference of the magnet holder 2 with the adhesive 4, the amount necessary and sufficient for adhesion can be easily found and the workability is improved.

The gap 2b is provided near the gap between the yoke 1 and the field magnet 3 and between the yoke 1 and the magnet holder 2, and the adhesive 4 flows into the gap 2b. The adhesive 4 flows smoothly by providing the gradient 2d so as to be easy.

[0018]

According to the present invention, since the concave groove provided on the outer periphery of the magnet holder is used as the adhesive reservoir, the adhesive does not flow into the excess portion.

By filling the concave groove of the magnet holder with the adhesive, the amount required for the adhesion can be known and the workability is improved.

It is possible to smoothly pour between the yoke and the field magnet.

The effects described above are exhibited.

[Brief description of drawings]

FIG. 1 is a top view of a magnet holder, a yoke, and a field magnet according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view when FIG. 1 is viewed from a side surface.

FIG. 3 is a partial cross-sectional view of FIG. 1 as viewed obliquely.

FIG. 4 is a partial cross-sectional view of a magnet starter according to an embodiment of the present invention.

[Explanation of symbols]

1 ... York, 2 ... Magnet holder, 2a ... Adhesive reservoir groove,
2b ... gap, 2c ... protrusion, 2d ... gradient, 3 ... field magnet,
4 ... Adhesive, 5 ... Pinion shaft, 11 ... Planetary gear,
11a ... Planetary gear shaft, 12 ... Internal gear, 22 ... Clutch, 24 ... Pinion, 25 ... Ring gear, 40 ... Magnetic switch, 41 ... Shift lever, 42 ... Motor, 42a ... Armature, 6 ... Armature shaft, 6
b ... Armature gear.

Claims (1)

[Claims] 1. A cylindrical yoke and a ring-shaped magnet holder which is arranged on both sides or one side of the yoke and fixes a plurality of field magnets arranged at equal intervals on the inner peripheral surface of the yoke. In addition, in the field device of the magnet motor in which the yoke and the field magnet are joined with an adhesive, the magnet holder is provided with a groove shape, and a gradient is provided in a direction in which the adhesive flows. Magnetic motor field device.