JP3494065B2 - Outer rotor type magnet type rotating machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer rotor type magnet rotating machine such as an outer rotor type magnet generator.

[0002]

2. Description of the Related Art A procedure for manufacturing an outer rotor type magnetic rotary machine of this type will be described with reference to FIGS.

In the stator 1, after the insulating bobbin 3 is formed by resin coating on the stator core 2 made of a laminated body of steel plates, the winding 4 is wound around the insulating bobbin 3 and impregnated with the resin.

The rotor 5 is plated on a rotor yoke 6 made of a drawn iron plate, and then the bottom portion 6a of the rotor yoke 6 is plated.
The rotor boss 7 is fixed to the rotor boss 7 with the rivet 8, the permanent magnet 9 is fixed to the inner periphery of the cylindrical portion 6b of the rotor yoke 6, and the cooling fan 10 is press-fitted and fixed to the rotor boss 7.

The front cover 11 is attached to a crankcase 12 of an internal combustion engine with bolts 13, and then the rotor 5 is attached to a rotary shaft 14 composed of a crankshaft. The rotor 5 is attached to the rotary shaft 14 by fitting the base side of the rotor boss 7 to the tip of the rotary shaft 14 and fixing the rotor boss 7 with a mounting bolt 15.

The stator 1 is attached to the outer periphery of the distal end of a cylindrical stator boss 17 which is integrally provided in the center of the rear cover 16 so as to project inward, with a screw (not shown), and then a bearing is fitted to the inner periphery of the distal end of the stator boss 17. In the portion 18, the rotor boss 7
The bearing 19 on the outer circumference of the tip of the is fitted, and the rear cover 16 is fixed to the front cover 11 with the bolt 20. Finally, the cap 22 is fitted into the removal tool insertion hole 21 in the center of the rear cover 16 and the operation is completed.

The rear cover 16 is provided with an intake port 23a for sucking the outside air, the front cover 11 is provided with an exhaust port 23b for discharging the inside air, and the bottom portion 6a of the rotor yoke 6 is provided with the ventilation port. 23c is provided.

[0008]

However, such a conventional outer rotor type magnet type rotating machine has the following problems.

(A) When the stator 1 attached to the rear cover 11 is attached to the rotor boss 7 of the rotor 5 via the bearing 19, the stator core 2 comes into contact with the permanent magnet 9 by the attractive force of the permanent magnet 9 of the rotor 5, The permanent magnet 9 may be damaged. In particular, the stator core 2 and the permanent magnet 9
If the gap between the
When using, the workability of assembling deteriorates.

(B) When the stator 1 is removed, the stator boss 17 and the bearing 19 are tightly fitted to each other and cannot be easily removed.

An object of the present invention is to provide an outer rotor type magnetic rotating machine in which a stator mounted on a rear cover can be easily mounted on a rotor boss of a rotor via a bearing.

Another object of the present invention is to provide an outer rotor type magnet type rotating machine which can easily remove a stator using a cutting tool.

[0013]

According to the present invention, there is provided a stator having a winding wound around a stator core, and a rotor in which a permanent magnet is supported on the inner circumference of a cylindrical portion of a rotor yoke which surrounds the outer circumference of the stator. , A rotor boss that is integrally provided in the center of the bottom of the rotor yoke, supports the bearing on the outer circumference, and has a hole for fixing the rotating shaft on the inner circumference, and the stator core is fixed on the outer circumference, and the bearing on the inner circumference A cylindrical stator boss having a bearing fitting portion for supporting the rotor yoke, a front cover that surrounds the rotor yoke and has a rotary shaft through hole at the center of the bottom portion that is attached to the internal combustion engine, and an opening of the rotor yoke. (EN) An outer rotor type magnetic rotating machine provided with a rear cover integrally provided on the end side of a stator boss and fixed to a front cover.

In the outer rotor type magnetic rotary machine according to the present invention, the stator boss is integrally provided with a bearing guide portion for guiding the bearing before the bearing fitting portion on the inner periphery thereof. To do.

As described above, when the bearing guide portion for guiding the bearing is projected from the stator boss prior to the bearing fitting portion on the inner periphery of the stator boss, the stator boss on the stator side can be utilized by utilizing the bearing guide portion. It can be easily fitted to the bearing on the outer periphery of the. Therefore, the stator attached to the rear cover can be easily attached to the rotor boss of the rotor via the bearing even if there is an attractive force of the permanent magnet.

In the outer rotor type magnet type rotating machine according to the present invention, the rear cover is provided with a punching tool insertion hole at the center thereof and a plurality of punching tool mounting screw holes on the outer periphery thereof. Is preferred. In this way, the removal work on the rear cover side using the removal tool can be performed smoothly.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION FIG. 1 (A) (B) to FIG. 3 (A)
FIG. 1B shows an example of an embodiment of an outer rotor type magnet rotating machine in which the present invention is applied to an outer rotor type magnet generator, and FIGS. 1A and 1B show the outer rotor of this example. Front view and partial vertical side view of a magnet-type generator, Fig. 2
3A is a vertical cross-sectional side view of the stator with the rear cover attached in the outer rotor type magnetic generator of this example.
FIG. 2B is a front view and a vertical cross-sectional view showing the structure of the rear cover used in the outer rotor type magnetic power generator of this example and the stator boss integrated with the rear cover. The parts corresponding to those in FIGS. 4 and 5 described above are designated by the same reference numerals.

In the outer rotor type magnet generator of this embodiment, the stator boss 17 is integrally provided with a bearing guide portion 24 for guiding the bearing 19 prior to the bearing fitting portion 18 on the inner periphery thereof. Further, the rear cover 16 is provided with a punching tool insertion hole 21 at the center thereof, and a plurality of punching tool mounting screw holes 25 is provided on the outer periphery thereof. At the center of the bottom portion of the front cover 11, there is provided a rotary shaft through hole 26 that rotatably penetrates the rotary shaft 14 composed of a crankshaft. Other configurations are the same as those shown in FIGS.
Is similar to.

As described above, when the bearing guide portion 24 for guiding the bearing 19 is projectingly provided on the stator boss 17 before the bearing fitting portion 18 on the inner periphery thereof, the stator 1 is utilized by utilizing the bearing guide portion 24. Side stator boss 17 to rotor boss 7
It can be easily fitted to the bearing 19 on the outer periphery of the. Therefore, the stator 1 attached to the rear cover 16 can be easily attached to the rotor boss 7 of the rotor 5 via the bearing 19 even if the permanent magnet 9 has an attractive force.

Further, since the rear cover 16 is provided with a punching tool insertion hole 21 at the center thereof and a plurality of punching tool mounting screw holes 25 on the outer periphery thereof, the punching tool can be used by utilizing these. It is possible to smoothly remove the rear cover 16 side.

In the above example, the present invention is applied to the outer rotor type magnet generator, but the present invention is not limited to this and is similarly applied to the outer rotor type magnet electric motor and the like. be able to.

[0022]

In the outer rotor type magnetic rotary machine according to the present invention, the stator boss is integrally provided with the bearing guide portion for guiding the bearing before the bearing fitting portion on the inner periphery of the stator boss. By using this bearing guide portion, the stator boss on the stator side can be easily fitted to the bearing on the outer circumference of the rotor boss. Therefore, the stator attached to the rear cover can be easily attached to the rotor boss of the rotor via the bearing even if there is an attractive force of the permanent magnet.

[Brief description of drawings]

1A and 1B are a front view and a partially longitudinal side view of an example of an embodiment in which the present invention is applied to an outer rotor type magnet generator.

FIG. 2 is a vertical cross-sectional side view of a stator attached to a rear cover in the outer rotor type magnetic generator of this example.

3 (A) and 3 (B) are a front view and a longitudinal sectional view showing the structure of a rear cover used in the outer rotor type magnet generator of this example and a stator boss integrated with the rear cover.

FIG. 4 is a partially longitudinal side view of a conventional outer rotor type magnet generator.

FIG. 5 is a vertical cross-sectional side view of a stator attached to a rear cover in a conventional outer rotor type magnet generator.

[Explanation of symbols]

1 stator 2 Stator core 3 insulated bobbins 4 windings 5 rotor 6 rotor yoke 6a bottom 6b tube 7 Rota Boss 8 rivets 9 Permanent magnet 10 Cooling fan 11 Front cover 12 crankcase 13 volt 14 rotation axis 15 Mounting bolt 16 Rear cover 17 Stator Boss 18 Bearing fitting part 19 bearings 20 volts 21 punching tool insertion hole 22 Cap 23a intake port 23b exhaust port 23c vent 24 Bearing guide part 25 Screw holes for attaching the extraction tool

Claims (2)

(57) [Claims] 1. A stator in which a winding is wound around a stator core, a rotor in which a permanent magnet is supported on the inner circumference of a cylindrical portion of a rotor yoke which surrounds the outer circumference of the stator, and a center of the bottom portion of the rotor yoke. A rotor boss that is integrally provided with a bearing on the outer periphery and has a rotation shaft fixing hole on the inner periphery, and a bearing fitting that fixes the stator core to the outer periphery and supports the bearing on the inner periphery. A cylindrical stator boss having a joint portion, a front cover surrounding the rotor yoke and having a rotary shaft through hole in the center of the bottom portion attached to the internal combustion engine, and an opening end side of the rotor yoke. An outer rotor type magnetic rotating machine comprising: a rear cover integrally provided at an end of the stator boss and fixed to the front cover; Of the earlier than the bearing fitting part of the circumference, the outer rotor type magnet rotary machine bearing guide unit is characterized in that it is integrally projecting guiding the bearing. 2. The outer rotor according to claim 1, wherein the rear cover is provided with an extraction tool insertion hole at a center thereof and a plurality of extraction tool mounting screw holes provided on an outer periphery thereof. Shaped magnet type rotating machine.