JP3991770B2 - Flywheel magneto - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flywheel magneto.
[0002]
[Prior art]
The conventional flywheel magneto 1 includes a flywheel 4 having a tubular portion 4a, a permanent magnet 5 attached to the inner periphery of the tubular portion 4a of the flywheel 4, and the center of the bottom portion 4b of the flywheel 4 from the center of the tubular portion 4a. The rotor 2 having the boss portion 4c protruding inward and the convex pole portion 6a on the outer peripheral side are arranged concentrically with the rotor 2 in the space between the permanent magnet 5 of the rotor 2 and the boss portion 4c. It winds around the convex pole part 6a of the laminated core 6 via the annular laminated core 6 and the pair of side plates 7a, 7b holding the laminated core 6 at both ends in the lamination direction of the laminated core 6, and these side plates 7a, 7b. And a stator 3 having a coil 8 mounted thereon, and the stator 3 is positioned and fixed to the mounting base 11.
[0003]
In this case, the boss 4c is fitted and fixed to the outer periphery of the rotation shaft of the internal combustion engine (not shown). The rotor 2 is rotationally driven by the rotation of the rotary shaft of the internal combustion engine.
[0004]
Further, on the outer periphery of the laminated core 6, a mounting portion 6 b is provided between adjacent convex pole portions 6 a, and a mounting hole 9 is provided through the mounting portion 6 b.
[0005]
The above-described mounting base 11 projects from the case 10 of the internal combustion engine so as to concentrically surround the projecting portion of the rotating shaft. On the inner peripheral side of the tip of the mounting base 11, a male spigot portion 12b is projected in a cylindrical shape.
[0006]
The stator 3 is positioned by being fitted to the male spigot portion 12b of the mounting base 11 with the inner peripheral portion of the laminated core 6 on the side facing the mounting base 11 as a female spigot portion 12a. In this state, the stator 3 is attached to the mounting base 11 with the laminated iron core 6 screwed into the mounting base 11 with screws 13 penetrating through the mounting holes 9 between the side plates 7 a and 7 b and the laminated iron core 6.
[0007]
[Problems to be solved by the invention]
However, in such a flywheel magneto 1, the male spigot portion 12 b protruding from the mounting base 11 protrudes inward from the inner periphery of the annular laminated iron core 6, so the male spigot portion 12 b and the boss portion 4 c. As a result, there is a problem that the mechanical strength of the boss 4c cannot be increased by increasing the thickness of the boss 4c.
[0008]
An object of the present invention is to provide a flywheel magneto that can increase the mechanical strength of the boss portion by changing the structure of the inlay portion to widen the clearance between the inlay portion and the boss portion. .
[0009]
[Means for Solving the Problems]
The present invention is a rotor having a flywheel having a tubular portion, a permanent magnet attached to the inner periphery of the tubular portion of the flywheel, and a boss projecting inward from the center of the bottom of the flywheel; An annular laminated core that has a convex pole part on the outer peripheral side and is arranged concentrically with the rotor in the space between the permanent magnet and the boss part of the rotor, and holds the laminated core at both ends in the lamination direction of the laminated core And a stator having a pair of side plates and coils wound around the convex pole portions of the laminated iron core via these side plates, and a flywheel magneto in which the stator is positioned and fixed on a mounting base.
[0010]
In the flywheel magneto according to the present invention, on the inner diameter side portion of the side plate arranged adjacent to the mounting base, the male inlay portion protruding to the side away from the laminated iron core is inward from the inner circumference of the laminated iron core. It is characterized by being provided so as not to protrude.
[0011]
In this way, in the portion on the inner diameter side of the side plate arranged adjacent to the mounting base, the male spigot portion protruding to the side away from the laminated core does not protrude inward from the inner periphery of the laminated core. If provided, the male spigot part can be positioned by fitting with the female spigot part provided on the inner periphery on the mounting base side. In this way, the male and female spigot portions will not protrude inward from the inner periphery of the annular laminated core, and the clearance between the male and female spigot portions and the boss portion will be widened. The mechanical strength of the boss can be increased by increasing the thickness of the boss.
[0012]
In the flywheel magneto according to the present invention,
On the inner diameter side portion of the side plate disposed adjacent to the mounting base, a male inlay portion protruding to the side away from the laminated core is provided so as not to protrude inward from the inner periphery of the laminated core,
The male inlay portion is fitted into a female inlay portion provided on the inner periphery on the mounting base side, and the stator is positioned and fixed to the mounting base.
[0013]
In this way, in the portion on the inner diameter side of the side plate arranged adjacent to the mounting base, the male spigot portion protruding to the side away from the laminated core does not protrude inward from the inner periphery of the laminated core. When the stator is positioned on the mounting base by fitting the male spigot part to the female spigot part provided on the inner periphery on the mounting base side, the male and female spigot parts are separated from the inner periphery of the annular laminated core. It will not protrude inward. Therefore, the clearance between the male and female spigot portions and the boss portion is widened. For this reason, the thickness of the boss portion can be increased to increase the mechanical strength of the boss portion.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show a first example of an embodiment of a flywheel magneto according to the present invention. FIG. 1 is a longitudinal sectional view of the flywheel magneto of this example, and FIG. 2 is used in this example. It is a bottom view of the stator which is. The parts corresponding to those in FIGS. 4 and 5 are denoted by the same reference numerals.
[0015]
In the stator 3 of the flywheel magneto 1 of this example, the side plates 7a. 7 b, a male inlay portion 12 b that protrudes to the side away from the laminated iron core 6 is located inward from the inner circumference of the laminated iron core 6 at the inner diameter side portion of the side plate 7 a that is disposed adjacent to the mounting base 11. It is provided so as not to protrude.
[0016]
Accordingly, a female inlay portion 12a is provided in the inner periphery on the mounting base 11 side so as to be recessed.
[0017]
The stator 3 is positioned by fitting the male spigot portion 12b on the inner diameter side of the side plate 7a to the female spigot portion 12a on the inner periphery of the mounting base 11, and mounting holes 9 between the side plates 7a, 7b and the laminated core 6. The screw 13 penetrating the screw is fixed to the mounting base 11 by screwing.
[0018]
In this way, a male inlay portion 12b protruding to the side away from the laminated core 6 is located inward from the inner periphery of the laminated core 6 at the inner diameter side portion of the side plate 7a disposed adjacent to the mounting base 11. If it is provided so as not to protrude, the male inlay portion 12b can be fitted into the female inlay portion 12a provided on the inner periphery of the mounting base 11 to position the stator 3 on the mounting base 11. . By doing so, the male and female spigot portions 12 a and 12 b are not protruded inward from the inner periphery of the annular laminated core 6. Therefore, the clearance between the male and female spigot portions 12a and 12b and the boss portion 4c is widened. For this reason, the thickness of the boss portion 4c can be increased to increase the mechanical strength of the boss portion 4c.
[0019]
FIG. 3 is a bottom view of the stator used in the second example of the embodiment of the flywheel magneto according to the present invention. Note that portions corresponding to those in FIG. 2 are denoted by the same reference numerals.
[0020]
In the flywheel magneto 1 of this example, the mounting hole 9 of the laminated core 6 is provided in the annular portion of the laminated core 6.
[0021]
Accordingly, the male spigot portion 12 b provided in the same manner as in the first example is not continuous in the circumferential direction, and becomes a hooking portion 13 at a location adjacent to the attachment hole 9 of the laminated core 6. Other configurations are the same as those in the first example.
[0022]
Thus, even if the mounting hole 9 of the laminated core 6 is provided in the annular portion of the laminated core 6, the hook portion 13 is provided in the male inlay portion 12 b at a location adjacent to the mounting hole 9, so that the stator 3 Can be attached to the mounting base 11 with screws 13 without any trouble.
[0023]
Note that the mounting base 11 may not be continuous in the circumferential direction but may have a structure protruding intermittently in the circumferential direction.
[0024]
【The invention's effect】
In the flywheel magneto according to the present invention, on the inner diameter side portion of the side plate arranged adjacent to the mounting base, the male inlay portion protruding to the side away from the laminated iron core is inward from the inner circumference of the laminated iron core. Therefore, the male spigot portion can be fitted and positioned on the female spigot portion provided on the inner periphery on the mounting base side. In this way, the male and female spigot portions will not protrude inward from the inner periphery of the annular laminated core, and the clearance between the male and female spigot portions and the boss portion will be widened. The mechanical strength of the boss can be increased by increasing the thickness of the boss.
[0025]
Further, in the flywheel magneto according to the present invention, the male inlay portion protruding to the side away from the laminated core is formed on the inner diameter side portion of the side plate disposed adjacent to the mounting base from the inner circumference of the laminated core. The male spigot is provided so as not to protrude inward, and the male spigot is fitted to the female spigot provided on the inner periphery of the mounting base, so that the stator is positioned on the mounting base. It does not protrude inward from the inner periphery of the annular laminated core. Therefore, the clearance between the male and female spigot portions and the boss portion is widened. For this reason, the thickness of the boss portion can be increased to increase the mechanical strength of the boss portion.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a first example of an embodiment of a flywheel magneto according to the present invention.
FIG. 2 is a bottom view of a stator used in the first example.
FIG. 3 is a bottom view of a stator used in a second example of an embodiment of a flywheel magneto according to the present invention.
FIG. 4 is a longitudinal sectional view of a conventional flywheel magneto.
FIG. 5 is a bottom view of a stator used in a conventional flywheel magneto.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Flywheel magneto 2 Rotor 3 Stator 4 Flywheel 4a Cylindrical part 4b Bottom part 4c Boss part 5 Permanent magnet 6 Laminated iron core 6a Convex part 6b Mounting part 7a, 7b Side plate 8 Coil 9 Mounting hole 10 Case 11 Mounting base 12a Female spigot part 12b Male spigot part 13 Screw

Claims (2)

A rotor having a flywheel having a tubular portion, a permanent magnet attached to the inner periphery of the tubular portion of the flywheel, and a boss projecting from the center of the bottom of the flywheel to the inside of the tubular portion; An annular laminated core disposed in a space between the permanent magnet and the boss portion of the rotor having a convex pole portion and concentrically with the rotor, and the laminated core at both ends in the lamination direction of the laminated core In a flywheel magneto comprising a pair of holding side plates and a stator having coils wound around the convex pole portions of the laminated iron core via these side plates, and the stator is positioned and fixed to a mounting base.
In the inner diameter side portion of the side plate on the side disposed adjacent to the mounting base, the male spigot portion that protrudes away from the laminated core does not protrude inward from the inner periphery of the laminated core. A flywheel magneto characterized by being provided. A rotor having a flywheel having a tubular portion, a permanent magnet attached to the inner periphery of the tubular portion of the flywheel, and a boss projecting from the center of the bottom of the flywheel to the inside of the tubular portion; An annular laminated core disposed in a space between the permanent magnet and the boss portion of the rotor having a convex pole portion and concentrically with the rotor, and the laminated core at both ends in the lamination direction of the laminated core In a flywheel magneto comprising a pair of holding side plates and a stator having coils wound around the convex pole portions of the laminated iron core via these side plates, and the stator is positioned and fixed to a mounting base.
In the inner diameter side portion of the side plate on the side disposed adjacent to the mounting base, the male spigot portion that protrudes away from the laminated core does not protrude inward from the inner periphery of the laminated core. Provided,
The flywheel magneto, wherein the male inlay portion is fitted into a female inlay portion provided on an inner periphery of the mounting base, and the stator is positioned and fixed to the mounting base.

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