JPH0116373Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a flywheel magnet rotor used as a rotor of a magnet generator attached to an internal combustion engine or the like.

[Prior Art] A flywheel magnet rotor attached to an internal combustion engine includes a flywheel formed into a substantially cup shape, a permanent magnet fixed to the inner periphery of the peripheral wall of the flywheel, and a permanent magnet fixed to the flywheel. It consists of a rotating shaft. The rotating shaft has a threaded portion at its tip, and the threaded portion is fitted into a tapered hole provided in a boss portion of the flywheel. A nut is screwed onto the threaded portion of the rotary shaft that projects outward from the flywheel, and the rotary shaft is fixed to the flywheel by tightening the nut.

When installing air blowing blades for engine cooling or power generation coil cooling on this type of flywheel magnet rotor, conventionally a fan member having a structure with a large number of blades protruding from the base plate is prepared, and the base plate of this fan member is was fixed to the bottom wall of the flywheel using numerous rivets.

[The problem that the idea aims to solve]

As mentioned above, in the conventional flywheel magnet rotor, the fan member was fixed to the flywheel using a large number of rivets, which caused the problem that the number of parts increased.

Furthermore, since the fan member is generally made of a brittle or soft material such as plastic or aluminum, there is a problem in that if the fan member is fixed using rivets, the fan member may be damaged or deformed.

The purpose of the present invention is to provide a flywheel formed into an approximately cup shape, a permanent magnet fixed to the inner periphery of the peripheral wall of the flywheel, and a permanent magnet having a threaded portion at the tip and attached to the boss portion of the flywheel. A rotating shaft that is fitted into a tapered hole and has a threaded portion protruding outward from the flywheel, and a nut that is screwed into the threaded portion of the rotating shaft to fix the rotating shaft to the flywheel. To provide a flywheel magnet rotor in which a fan member can be fixed to a flywheel using fewer parts than before and without deforming or damaging it.

[Means to solve the problem]

In the present invention, in order to achieve the above object, a fan member consisting of a base plate that comes into contact with the outer surface of the bottom wall of the flywheel and blower blades protruding from the base plate is prepared. A hole having an inner diameter larger than the outer diameter of the nut is provided in the center of the base plate.

In addition, a disk-shaped spring is provided, and the inner circumference of the disk-shaped spring is tightened and fixed to the bottom wall of the flywheel with a nut, and the outer circumference of the disk-shaped spring is attached around the hole in the base plate of the fan member. The fan member is pressed against the bottom wall of the flywheel.

Furthermore, a hole or a recess is provided on one of the base plate of the fan member and the bottom wall of the flywheel, and a protrusion that fits into the hole or recess is provided on the other, and the fitting between the hole or the recess and the protrusion causes Positioning the fan member relative to the flywheel.

[Effect]

With the above structure, the fan member can be fixed to the flywheel using the nut and the disc-shaped spring, and the large number of rivets that were conventionally required can be omitted, so the number of parts can be reduced. Furthermore, since the fan member is fixed to the flywheel via the disc-shaped spring, there is no possibility that the fan member will be damaged.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

The drawing shows an embodiment of the present invention, and in the drawing, reference numeral 1 denotes an iron flywheel formed into a substantially cup shape and having a bottom wall portion 1a and a peripheral wall portion 1b. A permanent magnet 2 is fixed to the inner periphery of the peripheral wall portion 1b of the flywheel 1. A hole 1c is provided in the center of the bottom wall 1a of the flywheel 1,
A boss 3 is arranged inside the bottom wall portion 1b so as to align with the hole. The boss 3 has a tapered hole 3a aligned with the hole 1c, and one end thereof is provided with a flange 3b that abuts the inner surface of the bottom wall of the flywheel. The positioning protrusion 3 is formed by punching out a part of the flange 3b toward the bottom wall of the flywheel.
c (plurality) are formed, and the positioning protrusions are respectively fitted into positioning holes provided in the bottom wall of the flywheel, thereby positioning the boss 3 with respect to the bottom wall of the flywheel.

Note that a recess may be provided instead of the positioning hole, or a positioning projection may be provided on the flywheel 1 side, and a hole or recess into which the projection fits may be provided on the flange side of the boss 3.

A fan member 4 made of plastic, aluminum, or the like is provided on the outer surface of the bottom wall portion 1a of the flywheel 1. This fan member includes a disk-shaped base plate 4a that contacts the outer surface of the bottom wall 1a of the flywheel, and a large number of air blowers protruding from a portion of the base plate closer to the outer periphery so as to be lined up at predetermined intervals in the circumferential direction. A hole 4c is provided in the center of the substrate portion 4a. A protrusion 1d protruding outward is provided on the bottom wall of the flywheel by punching, and a hole 4d is provided on the base plate of the fan member 4 into which the protrusion 1d is fitted to position the fan member relative to the flywheel. (plural) are provided.

Note that a recess may be provided in place of the hole 4d, or a protrusion may be provided on the base plate 4a side, and a hole or a recess into which the protrusion fits may be provided on the bottom wall side of the flywheel.

A tapered portion of the rotating shaft 5 is fitted into the tapered hole 3a of the boss 3. This rotating shaft is, for example, the output shaft of an internal combustion engine, and the tip of the rotating shaft has a threaded portion 5.
A is provided. The threaded portion 5a projects outward through a hole 1c in the bottom wall of the flywheel, and a nut 6 is screwed into the threaded portion. A dish-shaped spring 7 and a washer 8 are also fitted into the threaded portion 5a and positioned between the nut 6 and the bottom wall of the flywheel. The disc-shaped spring 7 has an inner peripheral portion 7 that comes into contact with the periphery of the hole 1c in the bottom wall of the flywheel.
a and an outer peripheral part 7b which abuts against the peripheral part of the hole 4c of the base plate part 4a of the fan member 4 and presses the base plate part against the bottom wall of the flywheel. The cross section is curved so that it has a convex arc shape toward the bottom wall of the flywheel. Hole 4c of fan member
The inner diameter of the nut 6 is set to be larger than the outer diameter of the nut 6 and the outer diameter of the inner peripheral part of the disc spring 7, so that the inner peripheral part 7a of the disc spring 7 is inserted into the hole 4c of the base plate of the fan member by the nut 6. It is tightened against the bottom wall of the flywheel. Therefore, the fan member 4 has a projection 1d.
It is positioned by fitting into the hole or recess 4d, and is pressed and fixed against the flywheel by the dish-shaped spring 7. The flywheel magnet rotor 9 is constituted by each of the above parts.

In the figure, 10 is a stator in which an armature coil 12 is wound around an armature core 11 made of laminated steel plates.
This stator 10 is disposed inside a magnet rotor and is provided at a stator mounting portion 13 provided in an engine case or the like.
is fixed with screws 14. This stator and flywheel magnet rotor 9 constitute a magnet generator.

[Effects of the Invention] As described above, according to the present invention, since the fan member is attached to the flywheel via the dish-shaped spring, there is no need to use rivets, and the number of parts can be reduced. Further, since the fan member is pressed and fixed by the disc-shaped spring, there is no need to apply excessive force to the fan member as would be the case with rivets.
Therefore, even if the fan member is made of a brittle or soft material such as plastic or aluminum, the fan member will not be damaged.

[Brief explanation of the drawing]

The drawing is a sectional view of essential parts showing an embodiment of the present invention. 1...Flywheel, 1a...Bottom wall part, 1b
...Peripheral wall portion, 1c...hole, 1d...protrusion, 2...
Permanent magnet, 3...Boss, 4...Fan member, 4a
... Board part, 4b ... Air blower, 4c ... Hole, 5 ...
...Rotating shaft, 5a... Threaded part, 6... Nut, 7...
...Dish spring.

Claims (1)

[Scope of utility model registration request] A flywheel formed almost in a cup shape,
A permanent magnet is fixed to the inner periphery of the peripheral wall of the flywheel, has a threaded portion at its tip, and is fitted into a tapered hole provided in the boss portion of the flywheel, so that the threaded portion is attached to the outside of the flywheel. In a flywheel magnet rotor, the flywheel magnet rotor includes a rotating shaft protruding in the opposite direction, and a nut that is screwed into a threaded portion of the rotating shaft to fix the rotating shaft to the flywheel. a fan member comprising a base plate that abuts the outer surface of the nut and a blower blade protruding from the base plate, the base plate having a hole in the center thereof having an inner diameter larger than the outer diameter of the nut; The peripheral part is tightened and fixed to the bottom wall of the flywheel by the nut, and the outer peripheral part is brought into contact with the peripheral part of the hole in the base plate of the fan member, so that the fan member is attached to the bottom wall of the flywheel. A hole or a recess is provided in one of the substrate portion of the fan member and the bottom wall portion of the flywheel, and the other is fitted into the hole or recess to press the fan member. A flywheel magnet rotor characterized in that each positioning projection is provided.