JP2003235192A - Magnetogenerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve such failure as loosening of a core coupling part or disconnection of magneto coils in an environment with heavy vibration. <P>SOLUTION: A magnetogenerator 100 comprises an annular generator coil 3 which is formed by circumferentially coupling a plurality of generator coil elements 31, and is provided with a fixing part 36f which fixes each of the generator coil elements 31 at the outer peripheral part of the generator coil, and a spacer 5A for fixing the generator coil element 31 at the inner peripheral part of the generator coil. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnet generator, and more particularly to a structure of a generator coil of an inner type magnet generator (a magnet generator having a rotor inside and a generator coil outside). .

[0002]

2. Description of the Related Art As a power generating coil of an inner type magnet generator, a power generating coil formed by combining a plurality of power generating coil elements in a circumferential direction to form an annular shape is known. In this type of power generating coil, a plurality of cores protrude inward from the inner peripheral surface of an annular yoke, and windings are wound around each core via a bobbin for insulation.

[0003]

However, when the magnet generator is used in a vibrating environment such as a motorcycle, according to the conventional generating coil, each generating coil element has a cantilever structure as described above. When the generator coil element is subjected to severe vibration, the tip of each generator coil element vibrates, and the joint fixed at the outer periphery loosens, causing a problem such as disconnection of the generator coil.

The present invention solves the above-mentioned problems of the prior art, and even when used in an environment with severe vibration, the magneto coil element is kept fixed and does not loosen. The purpose is to provide a generator.

[0005]

According to a first aspect of the present invention, each generator coil element is fixed by a fixing portion on the outer periphery of the generator coil and by a spacer on the inner periphery of the generator coil. Even when used below, it is possible to suppress vibration at the tip of the power generating coil element and prevent problems such as loosening of the joint fixed at the outer periphery and disconnection.

According to the second aspect, it is possible to provide an inexpensive spacer having a simple structure.

According to the third aspect of the present invention, since the power generating coil elements are connected to each other in the circumferential direction, the fixing portion in which the central core is located in the outer peripheral core and fixed by groove coupling in the conventional radial direction ( JP 200
1-112192), the thickness in the radial direction needs to be increased to secure the strength, whereas the thickness in the radial direction can be decreased, and the generator can be downsized.

According to a fourth aspect of the present invention, when shrinking the heated housing during shrink fitting, the outer peripheral surface of the generator coil is pressed by the contraction of the housing, so that the generator coil is firmly fixed. become.

According to the fifth aspect of the present invention, during shrink fitting, when the heated housing cools, part of the housing bulges into the recess and solidifies due to contraction of the housing, which prevents the generator coil from rotating. Can be exhibited more strongly.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view of a magnet generator according to an embodiment mounted on a pedestal, FIG. 2 is a front view of the magnet generator, and FIG. 3 is a spacer removed from the magnet generator. 7 is a front view showing a part of the state, FIG. 4 is a development view of the generator coil viewed from the shaft, and FIGS. 5 and 6 are main part front views showing a modified example of the spacer receiving portion.
FIG. 8 is a front view of a main part showing a modified example of the spacer receiving portion and a developed view similar to FIG. 4, showing a relationship between the spacer receiving portion and the modified example of the spacer, and FIG. The illustration of each road is shown.

In FIGS. 1 to 4, 100 is a magnet generator, and 200 is a pedestal of the magnet generator 100.
The magneto-generator 100 has a shaft 1 connected to the crankshaft of the engine by a spline or the like. Shaft 1
It is fixed to the rotor 2 by press fitting. Body part 21 of rotor 2
Is an outer peripheral portion 22 formed by arc-shaped divided or annular permanent magnets and an annular (small diameter cylindrical)
And an inner peripheral portion 23 composed of a laminated core of. An annular rotor-side spacer 24 is provided at each of the left and right ends of the main body 21. Both rotor side spacers 2
4 is a state in which the end portion 25a of the magnet protection case 25 is crimped inward in a state in which the end portion 25a of the magnet protection case 25 is arranged inside the magnet protection case 25 in which one end made of a thin-walled cylindrical non-magnetic material is squeezed into a bowl shape. As a result, it is integrated with the main body portion 21. The shaft 1 is rotatably held by bearings 5 provided on the pedestal 200 and the housing 4, respectively.

The outer peripheral surface of the rotor 2, that is, the magnet protection case 2
On the outer peripheral surface of 5, an annular (generally thick-walled cylindrical) magneto coil 3 serving as a stator is arranged to face each other with a slight gap. As shown in FIG. 2, the magneto coil 3 includes a plurality (12 in this example) of magneto coil elements 31 combined in the circumferential direction. Each magneto coil element 31 includes a core (laminated core) 36 made of a magnetic material, such as steel, having an H-shaped cross section. The core 36 includes a shaft portion 36a whose axial direction coincides with a radial direction from the central portion of the shaft 1, an inner flange portion 36b extending in a right angle direction (circumferential direction) from an inner end portion of the shaft portion 36a, and an axial portion. An outer flange portion 36c extending in a right angle direction (circumferential direction) from an outer end portion of the portion 36a. A winding portion 37 configured by winding a winding around a bobbin for insulating the core 36 is provided on the shaft portion 36a.

The inner end surface of the inner flange portion 36b faces the outer peripheral surface of the rotor 2 with a slight gap. The side peripheral surface of the inner flange portion 36b, that is, the surface orthogonal to the axial direction of the shaft 1 is covered with an annular non-magnetic portion 36i extending from the bobbin. In the left-right direction side portion of the non-magnetic portion 36i, that is, in the portion parallel to the axis of the shaft 1, a groove groove (spacer receiving portion) 36j as shown in FIG.
As shown in FIG. 4, a U-shaped wire rod (spacer) 5A made of a non-magnetic material is press-fitted into the space formed between the recessed grooves 36j of the adjacent power generating coil elements 31. The inner peripheral portion of the magneto coil 3 is firmly fixed by the spacer 5A. The shape of the groove 36j is not limited to the arcuate shape shown in FIG. 3, but may be a V-shape or a U-shape as shown in FIGS. May be. Furthermore, the non-magnetic part 3
As shown in FIG. 7 (A), the left and right side portions of 6i are smooth surfaces (spacer receiving portions) 36k having no groove groove 36j.
It may be composed of. However, in this case, as the spacer, a plate member 5B with a spring made of a non-magnetic material as shown in FIG. 7B is used, and the smooth surface 36k is pressed by the elastic force of the spring 5a, so that each power generating coil element 31 is pressed. A compressive force is applied to the inner flange portion 36b of the power generating coil 3 to firmly fix the power generating coil 3 in the inner peripheral portion. Although illustration is omitted as a spacer,
It is composed of a linear ring and a plurality of rod-shaped portions extending in parallel from the linear ring in the same direction, and each rod-shaped portion is configured to be press-fitted into the spacer receiving portion 36k. Good.

The outer flange portion 36c is longer than the inner flange portion 36b, and concave and convex portions 36d and 36e are formed at both ends thereof, respectively. Two adjoining magneto coil elements 31 are joined by a core joining portion 36f formed at the end of the outer flange portion 36c. In the core coupling part 36f, one of the magneto coil elements 31
Uneven portion 36d of the outer flange portion 36c and the uneven portion 36e of the outer flange portion 36c of the other power generating coil element 31
And fit together. Further, a concave portion 36g is formed on the outer peripheral surface of the core coupling portion 36f, that is, a surface facing the inner peripheral surface of the housing 4, and welding or the like is performed on the mating surface of the concave and convex portions 36d and 36e via the concave portion 36g. For example, the coupling strength between the concave-convex portions 36d and 36e is increased, and at the time of shrink-fitting into the housing 4, since the coil element 31 is integrated, the assembling property is also improved (reference numeral in FIGS. 2 and 3). 36h represents a convex portion at the time of welding). Note that reference numeral 38
Indicates a part of the bobbin that partially covers the end of the outer flange portion 36c (the end in the direction coinciding with the axial direction of the shaft 1).

The generator coil 3 as described above is fixed to the inner peripheral surface of a housing 4 made of a magnetic material such as steel. The inner peripheral surface of the housing 4 is in pressure contact with the outer flange portion 36c of each generator coil element. Also, the housing 4
A part 41 of the inner peripheral surface of the concave portion 36g of the core coupling portion 36f.
It swells inward and exerts a stronger anti-rotation effect on the magneto coil 3.

Next, in the process of manufacturing the magneto-generator 100 having the above-described structure, a plurality of magneto-coil elements 31 are assembled, fixed to the housing 4, and further the magneto-coil 3 is fixed at the inner peripheral portion. The method will be described in order.

First, a plurality of power generating coil elements 31 are combined and fixed in the circumferential direction. At this time, the two adjacent power generating coil elements 31 have the uneven portion 3 between the core coupling portions 36f.
6d, 36e are joined together by fitting them together. Then, if necessary, welding is performed on the mating surfaces of the concave and convex portions 36d and 36e via the concave portion 36g of the core coupling portion 36f. Next, the assembled coil 3 is placed inside the heated housing 4 and the housing 4 is cooled, so that the coil 3 is shrink-fitted (hot insert) onto the inner peripheral surface of the housing 4. At the time of this shrink fitting, when the housing 4 that has been thermally expanded due to heating is cooled, the housing 4 contracts, so that the inner peripheral surface of the housing 4 is solidified in pressure contact with the outer peripheral surface of the outer flange portion 36c of the power generating coil 3. Then, the coupling strength of the magneto coil 3 is improved. In addition, as shown in FIG. 3, a part 41 of the inner peripheral surface of the housing 4 partially bulges and solidifies in the recess 36g of the core coupling portion 36f, thereby exerting a stronger anti-rotation effect on the power generating coil 3. To do.

After that, the spacer 5A or 5B is press-fitted between the recessed groove 36j or the smooth surface 36k facing each other to fix the generator coil 3 in the inner peripheral portion.

Magneto-generator 100 manufactured in this way
Is a fixed part (core coupling part 36f
Etc.) and the inner peripheral part is spacer 5A
Or fixed by 5B. For this reason, even if it is used in an environment subject to severe vibration, each magneto coil element 31
Since it is possible to prevent such vibration, it is possible to eliminate problems such as loosening of the core coupling portion and disconnection of the power generation coil due to vibration of each power generation coil element 31.

Further, the adjacent generating coil elements 31 are
In the core joint portion 36f of the outer flange portion 36c of the core 36, the concavo-convex portions 36d and 36e are fitted to each other to be joined. That is, each magneto coil element 3
It is fixed by connecting the cores 36 of No. 1 in the circumferential direction. Therefore, in the conventional technique (Japanese Patent Laid-Open No. 2001-112192) in which the central core and the outer peripheral core are fixed by joining them in the radial direction, it is necessary to set the radial thickness to be thick in order to increase the joining strength. On the other hand, the thickness of the outer flange portion 36c can be set to be thin so as to function as the magnetic path B1 as shown in FIG.
Furthermore, since the housing 4 is made of a magnetic material, the structure shown in FIG.
As shown in FIG. 4, the housing 4 also constitutes the magnetic path B2, and it is possible to further reduce the thickness and to downsize the magneto-generator 100 as compared with the case where a non-magnetic material is used for the housing 4. it can.

[0022]

According to the magneto-generator of the present invention, it is possible to prevent vibration of the power generating coil element even in an environment where it is subjected to severe vibration, and it is possible to eliminate problems such as loosening of the core coupling portion and disconnection of the power generating coil. In addition, the generator can be downsized.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a state in which a magnet generator according to an embodiment of the present invention is attached to a pedestal.

FIG. 2 is a front view of the magnet generator.

FIG. 3 is a front view showing a part of the magnet generator with a spacer removed.

FIG. 4 is a development view of the generator coil viewed from the shaft.

FIG. 5 is a main part front view showing a modified example of a spacer receiving portion.

FIG. 6 is a main part front view showing another modified example of the spacer receiving portion.

FIG. 7 is a front view of a main part showing still another modified example of the spacer receiving portion, and a developed view similar to FIG. 4, showing a relationship between the spacer receiving portion and the modified example of the spacer. .

FIG. 8 is an explanatory diagram of a magnetic path of a power generation coil.

[Explanation of symbols]

100 magnet generator 3 generator coils 31 generator coil element 36 core 36d, 36e Concavo-convex part 36f Core coupling part (fixed part) 36g recess 36j Recessed groove (spacer receiving part) 36k smooth surface (spacer receiving part) 4 housing 5A U-shaped wire (spacer) 5B Plate with spring (spacer)

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02K 15/095 H02K 15/095 21/14 21/14 G // H02K 1/16 1/16 C F term (reference) 5H002 AA07 AB05 AB06 AC06 AC08 AE08 5H603 AA09 BB02 BB12 CA01 CA05 CC04 CC11 CC17 CD32 EE02 FA02 5H615 AA01 BB02 BB14 PP01 PP07 PP28 QQ26 RR02 SS03 SS09 SS11 SS16 5H621 GA01 GA04 GA12 GA14 GA16 GB03 GB08 J08

Claims (5)

[Claims] 1. A magneto generator comprising an annular power generation coil formed by combining a plurality of power generation coil elements in a circumferential direction, wherein a fixing portion for fixing each power generation coil element at an outer peripheral portion of the power generation coil, A magneto-generator having a spacer for fixing a magneto coil element at an inner peripheral portion of the magneto coil. 2. The U-shaped wire rod or the spacer,
2. A plate material with a spring.
The described magnet generator. 3. The power-generating coil element is provided with a concavo-convex portion formed on a circumferential end surface of a core of each power-generating coil element, and the concavo-convex portions between adjacent power-generating coil elements are fitted to each other. The magnet generator according to claim 2, wherein is fixed. 4. The magneto-generator according to claim 3, wherein the magneto coil is shrink-fitted to an inner peripheral surface of a housing made of a magnetic material. 5. The magneto-generator according to claim 4, wherein a recess is formed in a surface of the core facing the inner peripheral surface of the housing.