JP3428265B2 - Flywheel magnet rotor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flywheel magnet rotor in which a permanent magnet and a simulated magnetic steel are attached to the inner circumference of a flywheel at predetermined intervals in the circumferential direction.

[0002]

2. Description of the Related Art Generally, flywheel magnet rotors are
It has a structure in which a plurality of permanent magnets are attached to the inner circumference of the flywheel at predetermined intervals in the circumferential direction, but if the power generation output is not required so much, reduce the diameter of the flywheel or reduce the number of poles. It is conceivable to reduce the power generation output by decreasing it, but in this case it is uneconomical to prepare many types of flywheels or coils.

In some cases, it is necessary to keep the moment of inertia at the current level and to keep only the power generation output low. Therefore, it is usually made of mild steel or the like at the position where the permanent magnet is originally attached. The simulated magnetic steel is attached to adjust the output.

FIG. 6 shows an example of a flywheel magnet rotor provided with simulated magnetic steel.

This flywheel magnet rotor is provided with a flywheel 1 made of a cast product having a cylindrical peripheral wall portion 1a and a bottom plate portion 1b closing one end side thereof, and the bottom plate portion of the flywheel 1 is provided. The outer surface of 1b is provided with blower blades 2 for sending cold air to the internal combustion engine that rotationally drives the flywheel magnet rotor. In the present embodiment, on the peripheral wall portion 1a of the flywheel 1, permanent magnets 3 are arranged at three positions out of four at 90 ° intervals, and are attached by an adhesive. In order to position the permanent magnets 3 in the axial direction of the inner circumference of the flywheel 1, an axial positioning step portion 4 is provided in the inner circumference of the flywheel 1 along the circumferential direction. Prior to bonding, the adhesive 3 is positioned in the axial positioning step portion 4, and the adhesive is injected between the permanent magnet 3 and the flywheel 1 to perform the bonding. When the axial positioning step portion 4 is provided in this way, the permanent magnet 3 can be positioned without using a special jig, which has the advantage of facilitating the assembly work. Further, in this example, the simulated magnetic steel 5 is provided at one of the four locations at 90 ° intervals on the peripheral wall portion 1a of the flywheel 1.
Are fixed with adhesive.

By the way, in order to balance the weight of the simulated magnetic steel 5 with the permanent magnet 3, the dimension in the axial direction is made smaller because the specific gravity is larger than that of the permanent magnet 3. Therefore, when the simulated magnetic steel 5 is positioned in the same axial positioning step portion 4 as the permanent magnet 3, it does not coincide with the axial center of the permanent magnet 3 and the power generation performance deteriorates. Using a special positioning jig, the permanent magnet 3 was positioned so as to coincide with the axial center of the permanent magnet 3 and fixed with an adhesive as shown in the figure.

However, in the flywheel magnet rotor using the simulated magnetic steel 5 having such a short axial dimension,
As described above, there is a problem that a special positioning jig is required to attach the simulated magnetic steel 5.

In order to solve such a problem, a flywheel magnet rotor as shown in FIG. 7 has been proposed.

In this flywheel magnet rotor, the structure of the simulated magnetic steel 5 is different from that shown in FIG. That is, as shown in FIG. 8, the simulated magnetic steel 5 is formed by pressing a mild steel plate into a U-shaped cross section so that the outer dimensions are almost the same as those of the permanent magnets 3 and the weight of the permanent magnets 3 is almost the same as the weight of the permanent magnets 3 by removing the internal weight. I am doing the same.

Since the simulated magnetic steel 5 having such a shape has substantially the same outer dimensions and weight as the permanent magnet 3, it can be treated as the permanent magnet 3 and attached to the flywheel 1.

[0011]

However, the flywheel magnet rotor using the simulated magnetic steel 5 having the structure shown in FIG. 6 has the following problems.

(A) Since the simulated magnetic steel 5 is pressed into a U-shaped cross section, it is difficult to obtain the required dimensional accuracy due to backlash in the bent portion.

(B) In order to easily bend the simulated magnetic steel 5 into a U-shaped cross section by pressing, it is necessary to open the window 5a in the portion shown by hatching in FIG. Since the portion 5b is only a narrow portion on both sides of the window 5a, a sufficient amount of magnetic flux cannot be obtained, and it becomes impossible to secure the required performance.

(C) When the window 5a is provided, the rigidity of the bent portion is lowered, so that the outer shape of the simulated magnetic steel 5 during handling may change.

An object of the present invention is to provide a flywheel magnet rotor provided with a simulated magnetic steel having a structure and weight which are substantially the same as those of a permanent magnet, but which can prevent a change in dimensional accuracy after manufacture and a decrease in magnetic path. To provide.

[0016]

DISCLOSURE OF THE INVENTION The present invention is to improve a flywheel magnet rotor in which a permanent magnet and a simulated magnetic steel are attached to the inner circumference of the flywheel at predetermined intervals in the circumferential direction.

In the flywheel magnet rotor according to the present invention, the simulated magnetic steel sheet is a steel plate in the axial direction of the flywheel.
The outer layer shape is almost the same as the permanent magnet due to the stacked layers
Formed and open on the end face of the simulated magnetic steel in the stacking direction
As described above, each steel plate is formed with a lightening hole, and the simulated magnetic steel is formed to have substantially the same weight as the permanent magnet.

In this way, the simulated magnetic steel flies the steel plate
Almost the same as a permanent magnet due to the laminated body laminated in the axial direction
It is formed in the same outer shape, and the simulated magnetic steel has an edge in the stacking direction.
Each steel plate is formed with a lightening hole so as to open on the surface.
If the pseudo magnetic steel is formed to have almost the same weight as the permanent magnet,
Unlike the bent product, there is no fear that the dimensional accuracy will change after manufacturing, and unlike the bent product, the required magnetic path can be easily secured. Furthermore, since該模pseudo remanence steel of substantially the same outer shape as the permanent magnet, as possible out it is attached to the flywheel in the same way as the permanent magnet. In particular, the simulated magnetic steel is formed by a laminate of steel plates, Ru can be easily manufactured by press. Further, laminates of steel plates which constitute a simulated magnetic steel is laminated in the axial direction of the flywheel, the meat disconnect <br/>-out hole is opened to the end surface in the stacking direction, with the flywheel magnet rotor magnet The facing area between the pole portion of the stator constituting the generator and the simulated magnetic steel does not become small, a sufficient amount of magnetic flux can be obtained, and necessary performance can be secured.

The laminated body of steel plates constituting the simulated magnetic steel is provided with an axial positioning step portion provided on the inner circumference of the flywheel for positioning the permanent magnet in the axial direction of the inner circumference of the flywheel. It is preferably positioned.

When the laminated body of steel plates constituting the simulated magnetic steel is positioned on the axial positioning step portion of the flywheel in this way, the simulated magnetic steel is positioned in the axial direction of the flywheel in the same manner as the permanent magnet. You can

In another flywheel magnet rotor according to the present invention, the simulated magnetic steel is made of a sintered magnetic material so that it is permanent.
It is formed in the same outer shape as the magnet, and the simulated magnetic steel
Open the end face in the same direction as the axial direction of the flywheel and meat
A punch hole is formed so that the simulated magnetic steel has almost the same weight as the permanent magnet.
It is characterized in that it is formed in a quantity .

As described above, the simulated magnetic steel is formed of the sintered magnetic material into an outer shape substantially the same as that of the permanent magnet, and the simulated magnetic steel is formed.
Is opened on the end face in the same direction as the axial direction of the flywheel.
If the simulated magnetic steel is formed to have almost the same weight as the permanent magnet by forming a lightening hole , unlike the bent product, the dimensional accuracy does not change after manufacturing, and unlike the bent product. The required magnetic path can be easily secured. Furthermore,
Since the simulated magnetic steel has an outer shape substantially the same as that of the permanent magnet, it can be attached to the flywheel in the same manner as the permanent magnet.

[0023] In particular, the simulated magnetic steel is the is formed by a sintered magnetic material, as possible out be easily produced by molding process and the sintering process. In addition , when the lightening hole of the sintered magnetic material forming the simulated magnetic steel is opened on the end face in the same direction as the axial direction of the flywheel, the stator forming the magnet generator together with this flywheel magnet rotor is A facing area between the pole portion and the simulated magnetic steel does not become small, a sufficient amount of magnetic flux can be obtained, and necessary performance can be secured.

Further, the sintered magnetic material constituting the simulated magnetic steel is
In order to position the permanent magnet in the axial direction of the inner circumference of the flywheel, it is preferable that the permanent magnet is positioned on an axial positioning step provided on the inner circumference of the flywheel.

When the sintered magnetic material constituting the simulated magnetic steel is thus positioned on the axial positioning step of the flywheel, the simulated magnetic steel is positioned in the axial direction of the flywheel in the same manner as the permanent magnet. You can

[0026]

1 to 3 show a first example of an embodiment of a flywheel magnet rotor according to the present invention.

In the flywheel magnet rotor of this example, the simulated magnetic steel 5 is an arc-shaped steel plate 6 which is the shaft of the flywheel.
The permanent magnets 3 are formed to have substantially the same outer shape as the permanent magnets 3 and are formed to have substantially the same weight as the permanent magnets 3 by the lightening holes 7 provided at predetermined intervals in the circumferential direction of each steel plate 6. . Each steel plate 6 is formed so that the outer contour and the lightening hole 7 are formed by pressing.
The steel plates 6 can be fixed to each other by rivets, welding, bonding or the like. Each lightening hole 7 is opened in the end face of the laminated body of the steel plates 6 in the laminating direction. The simulated magnetic steel 5 has substantially the same outer shape as the permanent magnet 3 means that the simulated magnetic steel 5 has an inner surface, an outer surface, side surfaces at both ends in the circumferential direction, and end surfaces in the stacking direction. It means that the dimension and shape are almost the same as those of the permanent magnet 3.

Such a simulated magnetic steel 5 is an axial positioning step provided on the inner circumference of the flywheel 1 for axially positioning the permanent magnet 3 on the inner circumference of the peripheral wall portion 1a of the flywheel 1. It is positioned on the part 4 and attached with an adhesive.

In this way, when the simulated magnetic steel 5 is formed by the laminated body of the steel plates 6 to have substantially the same outer shape as the permanent magnet 3, unlike the bent product, the dimensional accuracy does not change after manufacturing. Further, since the simulated magnetic steel 5 has approximately the same weight as the permanent magnet 3 due to the lightening holes 7 provided in each steel plate 6, it is possible to easily secure a necessary magnetic path unlike a bent product. .

The laminated body of the steel plates 6 is the flywheel 1.
When the lightening holes 7 are laminated in the axial direction and the lightening holes 7 are opened at the end faces in the laminating direction, the facing area of the flywheel magnet rotor and the pole portion of the stator that constitutes the magneto-generator becomes small. And there is no magnetic flux,
The required performance can be secured.

When attaching the simulated magnetic steel 5 to the flywheel 1 with an adhesive, if the outer shape of the simulated magnetic steel 5 is substantially the same as the permanent magnet 3, the mounting position is also substantially the same as the permanent magnet 3. Therefore, the position of the nozzle for supplying the adhesive can be the same as that of the permanent magnet 3,
Further, the amount of adhesive supplied can be made the same as that of the permanent magnet 3, and the assembling of the flywheel magnet rotor can be easily automated.

4 and 5 show a second example of the embodiment of the flywheel magnet rotor according to the present invention.

In the flywheel magnet rotor of this example, the simulated magnetic steel 5 is made of a sintered magnetic material and has an outer shape substantially the same as that of the permanent magnet 3. They are formed to the same weight. Each lightening hole 7 is opened in the end face in the same direction as the axial direction of the flywheel 1. The simulated magnetic steel 5 made of such a sintered magnetic body is manufactured by a forming process and a sintering process. The lightening hole 7 is formed in the molding process.

Such a simulated magnetic steel 5 is an axial positioning step provided on the inner circumference of the flywheel 1 for axially positioning the permanent magnet 3 on the inner circumference of the peripheral wall portion 1a of the flywheel 1. It is positioned on the part 4 and attached with an adhesive.

As described above, when the simulated magnetic steel 5 is formed of the sintered magnetic body to have an outer shape substantially the same as that of the permanent magnet 3, and the lightening hole 7 is formed to have substantially the same weight as the permanent magnet 3. Unlike the bent product, there is no fear that the dimensional accuracy will change after manufacturing, and unlike the bent product, the required magnetic path can be easily secured. Further, since the simulated magnetic steel 5 has a substantially outer shape similar to that of the permanent magnet 3, it can be attached to the flywheel 1 in the same manner as the permanent magnet 3. In particular, if the simulated magnetic steel 5 is made of a sintered magnetic material,
It can be easily manufactured by a molding process and a sintering process.

When the lightening hole 7 of the sintered magnetic material constituting the simulated magnetic steel 5 is opened at the end face in the same direction as the axial direction of the flywheel 1, the flywheel magnet rotor and the magnet generator are constituted. The facing area between the pole portion of the stator and the simulated magnetic steel 5 does not become small, a sufficient amount of magnetic flux can be obtained, and necessary performance can be secured.

The sintered magnetic material forming the simulated magnetic steel 5 is axially provided on the inner circumference of the flywheel 1 in order to position the permanent magnets 3 axially on the inner circumference of the flywheel 1. When the positioning is performed on the positioning step portion 4, the simulated magnetic steel 5 can be positioned in the axial direction of the flywheel 1 in the same manner as the permanent magnet 3.

In the case of the simulated magnetic steel 5 made of a sintered magnetic material, it can be attached to the flywheel 1 with a rivet or the like. In this case, the permanent magnet 3 can also be attached to the flywheel 1 with a rivet or the like.

The simulated magnetic steel 5 and the permanent magnet 3 can be attached to the flywheel 1 by using a fixture separate from the flywheel 1.

In the above embodiment, the flywheel 1 is a cast product, and the three permanent magnets 3 and the one simulated magnetic steel 5 are used. However, the flywheel 1 may be drawn and may be permanent. The numbers of the magnets 3 and the simulated magnetic steels 5 can be set arbitrarily according to the power generation output required for the magnet generator.

[0041]

As described above, in the flywheel magnet rotor according to the present invention, the simulated magnetic steel is used to fly the steel plate into the flywheel.
Almost the same as a permanent magnet due to the laminated body laminated in the axial direction of the eel.
They are formed in the same outer shape, and the simulated magnetic steel has
Each steel plate has a lightening hole so that it opens at the end face.
Since the simulated magnetic steel is formed with almost the same weight as the permanent magnet, unlike the bent product, there is no risk of dimensional accuracy change after manufacturing, and unlike the bent product, the necessary magnetic path can be easily secured. be able to. Furthermore, since該模pseudo remanence steel of substantially the same outer shape as the permanent magnet, as possible out it is attached to the flywheel in the same way as the permanent magnet. In particular, since the simulated magnetic steel is formed by a laminate of steel plates, Ru can be easily manufactured by press. Further, laminates of steel plates which constitute a simulated magnetic steel is laminated in the axial direction of the flywheel, since the lightening holes are opened to the end surface in the stacking direction,
The facing area between the pole portion of the stator and the simulated magnetic steel that constitutes the magneto generator together with the flywheel magnet rotor does not become small, and a sufficient amount of magnetic flux can be obtained to secure the required performance. be able to.

When the laminated body of steel plates forming the simulated magnetic steel is positioned in the positioning step portion in the axial direction of the flywheel, the positioning of the simulated magnetic steel in the axial direction of the flywheel is performed in the same manner as the permanent magnet. Can be done by

[0043] Further, in another flywheel magnet rotor according to the present invention, the simulated magnetic steel is formed into substantially the same outer shape as the permanent magnet by sintering a magnetic material, and 該模pseudo remanence steel
Is opened on the end face in the same direction as the axial direction of the flywheel.
Since the simulated magnetic steel is formed to have almost the same weight as the permanent magnet by forming a lightening hole , unlike the bent product, the dimensional accuracy does not change after manufacturing, and unlike the bent product. The required magnetic path can be easily secured. Furthermore, since the simulated magnetic steel has an outer shape that is almost the same as a permanent magnet,
It can be attached to a flywheel in the same manner as the permanent magnet.

[0044] In particular, since the simulated magnetic steel is formed of a sintered magnetic material, as possible out be easily produced by molding process and the sintering process. Moreover, lightening holes of the sintered magnetic body constituting the simulated magnetic steel is because it is open to the axial end faces of the same direction of the flywheel, the stator constituting the magneto generator with the flywheel magnet rotor A facing area between the pole portion and the simulated magnetic steel does not become small, a sufficient amount of magnetic flux can be obtained, and necessary performance can be secured.

Further, the sintered magnetic material forming the simulated magnetic steel is
In order to position the permanent magnet in the axial direction of the inner circumference of the flywheel, when the permanent magnet is positioned in the axial positioning step portion provided in the inner circumference of the flywheel, the axial direction of the flywheel becomes the same as the permanent magnet. The simulated magnetic steel can be positioned with respect to.

[Brief description of drawings]

FIG. 1 is a front view of a first example of an embodiment of a flywheel magnet rotor according to the present invention.

2 is a cross-sectional view of FIG.

FIG. 3 is an enlarged view of a main part of FIG.

FIG. 4 is a front view of a second example of the embodiment of the flywheel magnet rotor according to the present invention.

5 is a cross-sectional view of FIG.

FIG. 6 is a cross-sectional end view of an example of a conventional flywheel magnet rotor.

FIG. 7 is a cross-sectional end view of another example of a conventional flywheel magnet rotor.

8 is a perspective view of the simulated magnetic steel used in FIG.

[Explanation of symbols]

1 flywheel 1a peripheral wall 1b Bottom plate part 2 air blower 3 permanent magnet 4 Axial positioning step 5 simulated magnetic steel 5a meat removal window 5b Magnetic path part 6 steel plate 7 lightening hole

Claims (4)

(57) [Claims] 1. A flywheel magnet rotor in which a permanent magnet and a simulated magnetic steel are attached to the inner periphery of a flywheel at predetermined intervals in the circumferential direction, wherein the simulated magnetic steel has a steel plate in the axial direction of the flywheel. product
The outer shape is almost the same as the permanent magnet due to the layered stack.
Is formed on the end surface of the simulated magnetic steel in the stacking direction.
As each of the steel plates is formed with a lightening hole,
A flywheel magnet rotor, wherein magnetic steel is formed to have substantially the same weight as the permanent magnet. 2. The laminated body of steel plates comprises the permanent magnet
In order to axially position the inner circumference of the flywheel,
Axial positioning on the inner circumference of the flywheel
The method according to claim 1, wherein the step is positioned on a step.
Flywheel magnet rotor as described . 3. A predetermined distance in the circumferential direction on the inner circumference of the flywheel.
Fly with a permanent magnet and simulated magnetic steel attached at a distance
In the wheel magnet rotor, the simulated magnetic steel is almost the same as the permanent magnet due to the sintered magnetic material.
It is formed in the same outer shape, and the simulated magnetic steel has the
(A) Open the end face in the same direction as the axial direction of the wheel to remove meat.
A hole is formed so that the simulated magnetic steel has almost the same weight as the permanent magnet.
A flywheel magnet rotor characterized in that it is formed in a quantity . 4. The sintered magnetic body comprises the permanent magnet and the flux.
In order to axially position the inner circumference of the rye wheel,
Axial positioning step provided on the inner circumference of the rye wheel
It is positioned in the part, and it is described in Claim 3.
Mounted flywheel magnet rotor.