JP4994995B2 - Magnet generator - Google Patents

Description

  The present invention relates to a magnet generator that is mounted on an engine such as a motorcycle, a buggy, or a snow vehicle to charge a battery and supply electric power to an electric load.

  In the magnet generator, in order to suppress the heat generation of the stator having the power generation coil, engine oil is injected into the stator to cool the stator.

  However, as the electrical load increases, the output of the magnet generator is further required and the stator needs to be cooled further. On the other hand, the engine output loss is required to be reduced, and the stator is cooled. There is a tendency to reduce the amount of engine oil (cooling oil) injected.

  4 is a cross-sectional view of a conventional magnet generator, and FIG. 5 is a cross-sectional view taken along line VV in FIG.

  4 and 5, reference numeral 1 denotes a rotor fixed to the end portion 200 a of the crankshaft 200 of the engine, and 2 denotes a stator fixed to the engine cover 300 that is opposed to the inside of the rare earth magnet 13 of the rotor 1. Represents.

  The stator 2 includes a core 24, and a power generation coil 27 is wound around the radial salient pole portion 24 a of the core 24.

  An oil introduction channel 302 is formed in the engine cover 300, and a small diameter oil injection hole 303 that opens to the inner surface 300 a of the engine cover 300 communicates with the oil introduction channel 302.

  Engine oil is injected from the oil injection hole 303 to the upper end portion of the side surface 2a of the stator 2, and the stator 2 is cooled.

  However, in the conventional magnet generator as described above, when the injection amount of the engine oil is large, the engine oil injected vigorously from the oil injection hole 303 strikes the upper end portion of the side surface 2a of the stator 2 and is diffused or dispersed. The almost whole area of the side surface 2a of the stator 2 can be cooled. However, when the amount of engine oil injected is reduced, the momentum of the engine oil injected from the oil injection hole 303 is weakened, and the upper end of the side surface 2a of the stator 2 is reduced. The engine oil hitting the engine hardly diffuses or disperses, and as shown by a solid arrow in FIG.

  For this reason, when the injection amount of engine oil is small, only a part of the side surface 2a of the stator 2 is cooled, and as a result, the temperature of the power generation coil 27 of the stator 2 rises and the output of the magnet generator decreases. Become.

  The present invention solves the problems of the prior art as described above, and can sufficiently cool the stator even when the injection amount of cooling oil such as engine oil is small, thereby reducing the output of the magnet generator. It aims at providing the magnet generator which can be suppressed.

  A magnet generator according to the present invention includes a stator having a power generation coil wound around a radial salient pole portion of a core, and in a magnet generator in which cooling oil is injected toward an upper end portion of a side surface of the stator. An oil receiving member disposed on at least the stator side surface to which the injected cooling oil hits is provided on the side surface, and the oil receiving member is an end surface of the power generating coil on an end surface near the root of the radial salient pole portion. It is characterized by comprising a cylindrical flange having opposing outer peripheral surfaces and an annular bent portion bent outward in the radial direction over the entire circumference from the tip of the cylindrical flange.

  In the magnet generator of the present invention, when the injection amount of the cooling oil is small, the cooling oil that hits the side surface of the stator flows downward along the side surface of the stator and flows downward, and is received by the cylindrical flange of the oil receiving member. . Since the cooling oil received by the cylindrical saddle is blocked by the annular bent part, it flows along the outer peripheral surface of the cylindrical saddle and can contact the power generation coil during the flow down. . Since the power generation coil in contact with the cooling oil is cooled by the cooling oil, a decrease in the output of the magnet generator is suppressed.

  Here, when the tip of the cylindrical saddle is projected forward from the side surface of the power generation coil, the injected cooling oil hits the side surface of the power generation coil and flows downwardly along this side surface. The cooling oil can be reliably received by the oil receiving member, and the amount of cooling oil contributing to cooling of the power generation coil increases.

  In addition, when an oil passage gap is formed between the outer peripheral surface of the cylindrical flange and the end face of the power generating coil near the root of the radial salient pole portion, cooling oil is provided in the oil passage gap. Enters and comes into contact with the end face of the power generation coil, and the power generation coil is further cooled.

  In addition, when the oil receiving member is formed of a metal material, the heat generation of the stator is easily transmitted to the outside through the oil receiving member, and the heat generation of the stator can be suppressed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a sectional view of a magnet generator according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG.

  1 to 3, the magnet generator 100 includes a rotor 1 fixed to an end 200 a of an engine crankshaft 200 and a stator 2 fixed to an engine cover 300.

  The rotor 1 includes an annular concave rotating member 11 made of a magnetic material. The tapered portion 11b formed on the boss portion 11a of the rotating member 11 is fitted and fixed to the end portion 200a of the crankshaft 200 by the bolt 31. A plurality of through holes 11 d for cooling are provided in the bottom (end surface portion) 11 c of the rotating member 11. A cylindrical outer peripheral portion 11e of the rotating member 11 constitutes a yoke.

  A ring-shaped spacer 12 made of a non-magnetic material and a plurality of permanent magnets (rare earth magnets) 13 arranged in an annular shape at equal intervals on the inner peripheral surface of the rotating member outer peripheral portion 11e are axial directions of the crankshaft 200. It is arranged along. The rare earth magnet 13 is fixed to the inner peripheral surface of the rotating member outer peripheral portion 11e by disposing the magnet protection ring 14 on the inner side and winding and crimping the tip end portion 11f of the rotating member outer peripheral portion 11e. The magnet protection ring 14 is formed by pressing a stainless steel plate.

  The stator 2 is disposed opposite to the inside of the rare earth magnet 13. The stator 2 is fixed to the engine cover 300 by passing the fastening bolts 32 through the screw insertion through holes 21 a formed in the laminated core 21 and screwing into the screw holes 301 formed in the engine cover 300.

  The stator 2 includes a laminated core 21. The laminated core 21 is configured by laminating a plurality of core sheets 21b obtained by pressing a magnetic steel sheet having a thickness of, for example, 0.5 mm. On one end surface side of the laminated core 21, that is, on the end surface on the opening 11 g side of the rotating member 11, an opening side core end plate 22 thicker than the core sheet 21 b is disposed, and the other end surface of the laminated core 21 is provided. The bottom side core end plate 23 thicker than the core sheet 21b is disposed on the side, that is, the end surface of the rotating member 11 on the bottom 11c side. The laminated core 21, the opening side core end plate 22, and the bottom side core end plate 23 form a core 24. The core 24 has radial salient pole portions 24a on the outer peripheral portion thereof. The opening-side core end plate 22 and the bottom-side core end plate 23 are each formed by pressing an iron plate having a thickness of, for example, 1.2 mm, and have flanges 22a and 23a.

  An oil receiving member 25 is attached to the side surface 24c of the base 24b of the core 24, in other words, to the opening side core end plate 22. The oil receiving member 25 is made of a metal material, and is formed by pressing an iron plate having a thickness of about 0.5 to 1.0 mm.

  The oil receiving member 25 includes an annular attachment portion 25a attached to the opening side core end plate 22, a cylindrical flange portion 25b extending in the horizontal direction from the tip of the annular attachment portion 25a, and the cylindrical flange portion. It is comprised by the annular | circular shaped bent part 25c bent at right angles to the radial outward direction over the perimeter from the front-end | tip of 25b.

  An outer peripheral surface 25d of the cylindrical flange portion 25b is an end surface 27a of the power generating coil 27 described later, and is opposed to an end surface 27a near the root of the radial salient pole portion 25a of the core 24. An oil flow path gap 28 is formed between the radial salient pole portions 25 a of the power generation coil 27 and the end face 27 a near the base.

  The tip of the cylindrical flange 25b protrudes forward from the side surface 27b of the power generation coil 27.

  The oil receiving member 25 is integrated with the core 24 by caulking a rivet 26 in a state where the bottom side core end plate 23, the laminated core 21, the opening side core end plate 22 and the oil receiving member 25 are laminated.

  The surfaces of the salient pole portions of the laminated core 21, the opening side core end plate 22, and the bottom side core end plate 23 are insulated by a powder resin coating layer 26 made of epoxy resin. A power generation coil 27 is formed. The power generating coil 27 is connected to a lead wire and held by a clip 41, and the clip 41 is fixed to the core 24 by a fastening screw 29.

  An oil introduction channel 302 is formed in the engine cover 300, and a small diameter oil injection hole 303 that opens to the inner surface 300 a of the engine cover 300 communicates with the oil introduction channel 302.

  Next, the behavior of engine oil (cooling oil) that cools the magnet generator configured as described above will be described.

  The engine oil is pressurized by an oil pump (not shown) attached to the engine, and is injected from the oil injection hole 303 to the upper end portion of the side surface 2a of the stator 2, specifically, to the side surface 27Ab of the power generation coil 27A. .

When the amount of engine oil injection is large, the engine oil that hits the side surface 27Ab of the power generation coil 27A diffuses or disperses on the side surface 27Ab, and can cool almost the entire area of the side surface 27b of the power generation coil 27 as a whole. When the injection amount of the engine oil is small, the engine oil hitting the side surface 27Ab of the power generation coil 27A flows down the side surface 27Ab of the power generation coil 27A and flows downward, and is received by the cylindrical flange 25b of the oil receiving member 25. become.

  Here, since the tip of the cylindrical flange 25b protrudes forward from the side surface 27b of the power generation coil 27, the engine oil that hits the side surface 27Ab of the power generation coil 27A and flows downwardly through this side surface 27Ab The oil receiving member 25 can be reliably received.

  Since the engine oil received by the cylindrical flange 25b is blocked by the annular bent portion 25c, it flows along the outer peripheral surface 25d of the cylindrical flange 25b, and is illustrated by a solid line arrow in FIG. As shown in FIG. For this reason, the engine oil can come into contact with the other power generation coil 27 while the engine oil is flowing down. Since the power generation coil 27 in contact with the engine oil is cooled by the engine oil, a decrease in the output of the magnet generator 100 is suppressed.

  Further, since an oil passage gap 28 is formed between the outer peripheral surface 25d of the cylindrical flange 25b and the end surface 27a near the root of the radial salient pole portion 25a in the power generating coil 27, the engine oil flowing down Enters the oil passage gap 28 and comes into contact with the end face 27a of the power generation coil 27, so that the power generation coil 27 is cooled.

  Further, the heat generation of the stator 2 is easily released to the outside through the metal oil receiving member 25, and the heat generation of the stator 2 is suppressed.

  As described above, according to the magnet generator 100 of the present embodiment, the stator 2 can be sufficiently cooled even when the injection amount of engine oil (cooling oil) is small, and the output of the magnet generator 100 Can be suppressed.

  In the above embodiment, the oil receiving member 25 is disposed on the side surface 2a of the stator 2 where the injected engine oil hits, out of the pair of side surfaces of the stator 2, but the oil receiving member 25 having substantially the same shape is further provided. It may be arranged on the other side surface of the stator 2.

It is sectional drawing of the magnet generator which concerns on one Embodiment of this invention. It is II-II sectional drawing shown in FIG. It is a principal part enlarged view of FIG. It is sectional drawing of the conventional magnet generator. It is VV sectional drawing shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Stator 2a Side surface 24 Core 24a Radial salient pole part 25 Oil receiving member 25b Cylindrical collar part 25c Annular bending part 25d Outer peripheral surface 27 Generator coil 27a End surface 27b Side surface 28 Oil flow path gap 100 Magnet generator

Claims (4)

In a magnet generator including a stator having a power generation coil wound around a radial salient pole portion of a core, and cooling oil is injected toward the upper end of the side surface of the stator,
An oil receiving member disposed on at least a stator side surface to which the injected cooling oil hits a pair of side surfaces of the stator, and the oil receiving member is an end surface of the power generation coil, and the radial salient pole portion A magnet generator comprising: a cylindrical flange having an outer peripheral surface facing an end surface near the root; and an annular bent portion that is bent radially outward from the tip of the cylindrical flange over the entire circumference. .   The magnet generator according to claim 1, wherein a tip end of the cylindrical flange projects forward from a side surface of the power generation coil.   The oil channel gap is formed between an outer peripheral surface of the cylindrical flange and an end surface near the root of the radial salient pole portion in the power generation coil. Magnet generator.   The magnet generator according to claim 1, wherein the oil receiving member is made of a metal material.

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