JP2001112225A - Magnet power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the cooling performance of an armature that is an electrical heating element in a magnet generator with a stator clutch especially even without using any conductors with high heat resistance, to suppress the temperature increase of a permanent magnet, and to make small the reduction of generation output. SOLUTION: In a magnet generator with a starter clutch where a stator clutch 5 is mounted onto the end face of a rotor 1, a window hole 20 for cooling is formed onto the end face of the rotor 1 while the window hole is extended from one part of a stator clutch clamping seat 100 in that the stator clutch 5 is mounted to the outer-periphery side. The window hole 20 for cooling being exposed at the outer-periphery side of the stator clutch 5 is covered with a fan 10, at the same time, an opening part 200 is provided on the rotary-direction side of the rotor 1 of the fan 10, and the angle of the blade of the fan 10 is bent forward to the rotary-direction side of the rotor 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a permanent magnet is attached to an inner peripheral side surface of a rotor so as to face an electron emission (stator side) formed by winding a coil around a fixed iron core. The present invention relates to a magnet generator that generates electricity by rotating around electrons, and more particularly to a magnet generator with a starter clutch used for an internal combustion engine for a motorcycle.

[0002]

2. Description of the Related Art Conventionally, in the case of a magnet generator with a starter clutch, a starter clutch is attached to the outer end face of the rotor, so that a window hole for introducing cooling air for cooling the generated electricity as a heating element or for forced oil cooling. However, even if was provided on the end face of the rotor, most of it was closed by the starter clutch, and the cooling effect could not be obtained.

[0003]

Therefore, the temperature of the generated electrons is likely to be high, and in the conventional magnet generator with a starter clutch, a conductive wire having good heat resistance must be used, resulting in an increase in cost or a temperature rise. Inevitably, measures were taken to reduce the power generation output.

SUMMARY OF THE INVENTION In view of the above, the present invention provides a magnet generator capable of improving the cooling performance of a generator, which is a heating element, with respect to a magnet generator having a starter clutch and having a limited cooling structure. It is an object of the present invention to provide an improved structure.

[0005]

Means for Solving the Problems The present invention is based on the following. In order to solve the above-mentioned problems, the technical means described in claims 1 to 4 is adopted.

According to the first aspect of the present invention, there is provided a magnet generator in which a starter clutch (5) is attached to an end face of a rotor (1), and a starter clutch tightening to which the starter clutch (5) is attached. Seat (100)
A cooling window hole (20) is formed in the end face of the rotor (1) so as to extend over the outer peripheral surface of the starter clutch, and a portion of the cooling window exposed on the outer peripheral side of the starter clutch (5). The hole (20) is covered with a fan (10), and an opening (2) is formed in the fan (10) in the direction of rotation of the rotor (1).
00) and the blade angle of the fan (10) is inclined forward in the rotation direction of the rotor (1), so that the blade angle is inclined forward in the rotation direction of the rotor (1). The air is taken in by the fan (10) and flows into the rotor (1) from the opening (200) or flows out of the rotor (1), and further to the outer peripheral side of the starter clutch (5). Cooling window holes (2
In addition to 0), the air spreads and flows not only in the portion of the cooling window hole (20) covered with the starter clutch, but also the generated electricity (4) can be efficiently cooled.

According to the second aspect of the present invention, the fan (10) is required because it is fixed to the cooling window hole (20) in a portion exposed to the outer peripheral side of the starter clutch (5). The shape and number of the fans (10) to be installed can be freely set depending on the cooling amount.

According to the third aspect of the present invention, since all of the fans (10) are formed on the annular fan plate (10b) concentric with the outer peripheral surface of the starter clutch (5), the fan plate (10b) is formed. ), The fan (10) can be positioned concentrically, which facilitates assembly.

According to the fourth aspect of the present invention, since the fan (10) is disposed on the back side of the end face of the rotor (1) to which the starter clutch (5) is attached, the rotor (1) If there is no space for installing the fan (10) on the mounting surface side of the starter clutch (5), the generation of electricity (4) can be efficiently performed by providing the fan (10) on the back surface side of the end face of the rotor (1). Can be cooled.

[0010]

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

FIGS. 1 and 2 relate to a first embodiment of the present invention. FIG. 1 is a cross-sectional view taken along a central axis of a magnet generator, and FIG. 2 is a view showing a rotor 10 in FIG. It is a rear view showing the state where it was attached.

In FIGS. 1 and 2, a permanent magnet 400 is fixedly mounted on the inner surface of the rotor 1 so as to oppose an electron generator 4 formed by winding a coil 4b around a side surface of an iron core 4a. . The rotor 1 is tapered into the rotary shaft hole 2 so that the crankshaft 7 of the engine is
And is fixed by a rotor fastening bolt 9.

The free wheel gear 6 is fixed to the crankshaft 7 by a bearing 300 so as to be rotatable around the axis of the crankshaft 7, and is connected to a starter motor (not shown) by a gear formed on the outermost periphery. Have been.

The starter clutch 5 is provided with a spigot portion 500 provided at the end of the rotor 1 by means of a clutch tightening bolt 3.
Through a sprag 5a which is tightly contacted with the starter clutch tightening seat surface 100, is arranged and accommodated in the starter clutch 5, and is provided with a power transmission by a lock and a free rotation by sliding according to a rotation direction. It is connected to the free wheel gear 6. The starter clutch 5 cuts off the transmission of the rotational force from the free wheel gear 6 to the rotor 1 by the sprag 5a of the starter clutch 5.

The power generation 4 is provided with an engine case cover 8.
Are screwed and fixed by an electromotive tightening bolt 110.

The fan 10 is made of an elastic material such as rubber or plastic, and has a starter clutch tightening seat surface 10.
The fan 10 is provided at a portion of a cooling window hole 20 extending from a part of the starter clutch 5 to the outer peripheral side of the rotor 1 (the cooling window hole 20 is formed across the outer peripheral surface 5b of the starter clutch 5). Inset. At this time, the fan 10 covers the portion of the cooling window hole 20 exposed on the outer peripheral side of the starter clutch 5 and is fixed around the cooling window hole 20 by bonding or heat caulking. An opening 200 is provided in the fan 10 in a direction opposite to the rotation direction of the rotor 1 to take in cooling air, and the blade angle of the fan 10 is inclined forward in the rotation direction of the rotor 1 to reduce air resistance. At the same time, it is easy to take in a lot of cooling air.

Next, the operation of the magnet generator according to the first embodiment of the present invention will be described.

When a starter (not shown) rotates at the start of the engine, the rotational force is transmitted in the order of the freewheel gear 6, the sprags 5a of the starter clutch 5, the rotor 1, and the crankshaft 7 to start the engine.

After the engine is started, the rotation speed of the crankshaft 7 becomes faster than the rotation speed of the starter motor, so that the sprag 5a of the starter clutch 5 is unlocked and becomes slidable, and the starter clutch 5 slides and the free wheel gear 6 The motor idles and the torque of the crankshaft 7 is not transmitted to the starter.

After the engine is started, the rotor 1 having the permanent magnet mounted thereon rotates around the generator 4 around which the coil 4b is wound around the iron core 4a, so that electric power is generated. The coil 4b of the generator 4 generates heat and has a high temperature. become.

On the other hand, in the magnet generator of the present invention, a cooling window hole 20 extending from a part of the starter clutch tightening seat surface 100 to the outer peripheral side of the rotor 1 is formed on the end surface of the rotor 1.
The cooling window hole 20 exposed on the outer peripheral side of the starter clutch 5 is covered with the fan 10, an opening 200 is provided on the rotation direction side of the rotor 1, and the blade angle of the fan 10 is Since the cooling air is provided to be inclined forward in the rotation direction, the direction of the cooling air is changed by the blades inclined forward in the rotation direction as shown by arrows in FIGS. In addition, the air also spreads and flows to the cooling window hole 20 in the portion covered by the starter clutch 5, and the air also spreads and flows to the inner peripheral side of the generator 4, and the starter clutch 5 is mounted on the end face of the rotor 1. The cooling air flow can be increased with a simple structure even in a magnet generator which has a limited cooling structure for mounting.
b is effectively cooled as a whole.

Further, since the fans 10 are individually fitted into the cooling window holes 20 which are exposed on the outer peripheral side of the starter clutch 5, they are individually fixed. The shape and number of can be set freely.

In the first embodiment, since the boss 2 and the rotor 1 are integrally formed, the size of the magnet generator in the direction of the central axis is shortened, and the magnet generator can be downsized.

FIGS. 3A and 3B show a first modified example of the fan 10, in which FIG. 3A is a partial rear view showing a state in which the fan 10 is mounted on the rotor 1, and FIG. FIG. 4 is a partial cross-sectional view along an axis.

Hereinafter, the substantially same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

In FIG. 3, in a first modification, the fan 10
Is fixed by injection molding to a portion of the cooling window hole 20 on the end face of the rotor 1 which protrudes to the outer peripheral side of the starter clutch. The fixing is more secure than in the case of the first embodiment, it can be used up to a high rotation speed, and it is suitable for mass production. The cooling air, as indicated by black arrows in FIGS. (A) and (B), spreads and flows, and efficiently cools the coil 4b of the generator 4.

FIGS. 4A and 4B show a second modification of the fan 10, in which FIG. 4A is a partial rear view showing a state where the fan 10 is mounted on the rotor 1, and FIG. FIG. 4 is a partial cross-sectional view along an axis.

In FIG. 4, in the second modification, the fan 10
A cover 10a is provided on the side surface of the cooling window, and the cooling air is more efficiently caught than in the first modification, and a larger amount of cooling air is taken into a portion of the cooling window hole 20 protruding to the outer peripheral side of the starter clutch. As shown by arrows in FIGS. 7A and 7B, the cooling air sufficiently spreads from the lower surface side of the starter clutch 5 to the inner peripheral side of the generator 4 to flow. The entire coil 4b of the electron 4 is effectively cooled.

Further, in the second modified example, the method of fixing the fan 10 to the rotor 1 is performed by spot welding 101, which increases the fixing strength and is suitable for mass production.

FIG. 5 is a rear view showing a third modification of the fan 10 with a fan plate 10b fitted to the rotor 1.

In the third modification, the fitting portion of the fan 10 is formed by an annular fan plate 10b concentric with the outer peripheral surface of the starter clutch 5, and the fan 10 is positioned. And easy assembling.

In FIG. 5, the fan plate 10b is fixed to the rotor 1 by spot welding 101.

FIG. 6 is a cross-sectional view of a magnet generator according to a second embodiment of the present invention, taken along a central axis.

In the magnet generator of the second embodiment, the boss 2 and the rotor 1 are separately formed and used by being connected by a connecting member such as a rivet (not shown). The present invention can be applied to such a type of magnet generator, and when applied to various internal combustion engines, there is an advantage that only the boss 2 needs to be changed and the rotor 1 side can be shared.

7 and 8 relate to a magnet generator according to a third embodiment of the present invention. FIG. 7 is a cross-sectional view taken along the center axis of the magnet generator, and FIG. 8 is a rotor 1 shown in FIG. FIG. 3 is a front view showing a state in which a fan 10 is mounted on the inner surface side of FIG.

According to the third embodiment, since the fan 10 is provided on the back side of the rotor 1, if there is no space for installing the fan 10 on the mounting surface side of the starter clutch 5 of the rotor 1, the rotor 1 By providing the fan 10 on the back side of the device, the cooling air flows as shown by the arrows in FIGS. 7 and 8, and the generated electricity 4 can be efficiently cooled.

[Brief description of the drawings]

FIG. 1 relates to a first embodiment of the present invention, and is a cross-sectional view along a central axis of a magnet generator.

FIG. 2 relates to the first embodiment of the present invention, and is a rear view showing a state in which a fan 10 is mounted on the rotor 1 in FIG.

FIG. 3 shows a first modification of the fan 10;
(A) is a partial rear view showing a state where the fan 10 is mounted on the rotor 1, and (B) is a partial cross-sectional view along a central axis of the magnet generator.

FIG. 4 shows a second modification of the fan 10;
(A) is a partial rear view showing a state where the fan 10 is mounted on the rotor 1, and (B) is a partial cross-sectional view along a central axis of the magnet generator.

FIG. 5 is a rear view showing a third modified example of the fan 10 with a fan plate 10b fitted into a rotor 1.

FIG. 6 is a cross-sectional view along a central axis of a magnet generator according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view of a magnet generator according to a third embodiment of the present invention, taken along a central axis of the magnet generator.

FIG. 8 is a front view of the magnet generator according to the third embodiment of the present invention, showing a state in which a fan 10 is mounted on the back side of the rotor 1 in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotor 5 Starter clutch 10 Fan 10b Fan plate 20 Cooling window hole 100 Starter clutch tightening seat surface 200 Opening

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) JK15 JK18

Claims (4)

[Claims] 1. A magnet generator having a starter clutch (5) attached to an end face of a rotor (1), wherein the starter clutch is mounted on a starter clutch tightening seat surface (100) to which the starter clutch (5) is attached. A cooling window hole (20) is formed in the end face of the rotor (1) so as to extend over the outer peripheral surface of (5), and the cooling window hole (20) is formed in a portion exposed to the outer peripheral side of the starter clutch (5). The cooling window hole (20) is covered with a fan (10), and an opening (200) is provided on the rotation direction side of the rotor (1) of the fan (10). A magnet generator characterized in that the blade angle is provided to be inclined forward in the rotation direction of the rotor (1). 2. The cooling fan according to claim 1, wherein the fan is fixedly fitted in a portion of the cooling window hole exposed on an outer peripheral side of the starter clutch. The described magnet generator. 3. The magnet power generator according to claim 1, wherein all the fans (10) are formed on an annular fan plate (10b) concentric with the outer peripheral surface of the starter clutch (5). Machine. 4. The magneto-generator according to claim 1, wherein the fan (10) is arranged on the back side of the end face of the rotor (1) to which the starter clutch (5) is attached.