JP2009124784A - Magneto generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magneto generator where the occurrence of a breakdown or wire disconnection at a joint and in its vicinity is reduced, by enhancing the vibration resistance of the joint. <P>SOLUTION: This magneto generator is equipped with a bowl-shaped flywheel 1; a plurality of permanent magnets 2 which are fixed to the internal wall face of this flywheel 1; a stator core 8, which is provided to the inner side of the flywheel 1 and whose peripheral face faces the permanent magnet 2; a generating coil 9, which is constituted with its lead wire being wound on this stator core 8; and a lead wire 13 for external output, which is electrically connected via a joint 14 to the lead wire 12 of this generating coil 9. Both sides of the joint 14 are fixed by a first clamping member 15A and a second clamping member 15B. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a magnet generator that generates power by electromagnetic induction between a permanent magnet and a power generation coil by rotation of a flywheel.

  Conventionally, a bowl-shaped flywheel, a plurality of permanent magnets fixed to the inner peripheral wall surface of the flywheel, a stator core provided on the inner diameter side of the flywheel and having an outer peripheral surface facing the permanent magnet, A power generating coil formed by winding a conductive wire around the stator core, a lead wire for external output electrically connected to the lead wire of the power generating coil via a connection portion, and the lead wire are fixed. A magnet generator including a clamp member is known (see, for example, Patent Document 1).

Japanese Patent Laying-Open No. 2007-166752 (FIG. 1)

In the conventional magnet generator, when external vibration (engine vibration or the like) is applied to the stator composed of the stator core and the power generation coil, the connecting portion is also vibrated. After crimping the crimp terminal at the connection part, the lead wire and the lead wire for external output are connected by soldering, so the mass is larger than the lead wire and lead wire alone. For this reason, the connecting portion has a large excitation force compared to the lead wire and the lead wire, and is easily damaged compared to the lead wire and the lead wire.
In particular, with the recent increase in engine output, etc., there has been a problem that external vibration applied to the stator is increased, and excessive stress is applied to the connection portion, causing damage and disconnection at the connection portion and its vicinity.

  An object of the present invention is to solve the above-described problems, and to improve a vibration resistance in a connection part, and to reduce the occurrence of breakage and disconnection in the connection part and its vicinity. The purpose is to obtain.

  In the magnet generator according to the present invention, a bowl-shaped flywheel, a plurality of permanent magnets fixed to the inner peripheral wall surface of the flywheel, and the outer peripheral surface provided on the inner diameter side of the flywheel and the permanent magnet A stator core facing each other, a power generation coil formed by winding a conductive wire around the stator core, and a lead wire for external output electrically connected to the lead wire of the power generation coil via a connection portion The both sides of the said connection part are being fixed by the clamp member.

  According to the magnet generator according to the present invention, by fixing both sides of the connecting portion with the clamp member, the excitation force to the connecting portion is reduced, and the occurrence of breakage and disconnection in the connecting portion and its vicinity is reduced. There is an effect.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding members and parts will be described with the same reference numerals.

Embodiment 1 FIG.
1 is a front view showing a magnet generator according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, and FIG. 3 is fixed from the direction of arrow A in FIG. It is a partial side view when the child 11 is seen.
The magnet generator includes a rotor connected to an internal combustion engine, and a stator 11 that faces the rotor and is attached to a fixing member (not shown).
The rotor includes a bowl-shaped flywheel 1 and a permanent magnet 2. The flywheel 1 rotates about the axis BB. Boss portion 5 is fixed to a rotating shaft (not shown) that is driven to rotate by the internal combustion engine.

For example, four permanent magnets 2 are fixed to the inner peripheral wall surface of the cylindrical portion of the flywheel 1. The permanent magnet is composed of magnets magnetized in the order of N pole, S pole, and N pole, and two permanent magnets 2 magnetized in the order of S pole, N pole, and S pole. Around B, they are arranged at equal angular intervals. In the plurality of permanent magnets, adjacent permanent magnets are magnetized in opposite polarities, and a magnetic field whose direction changes alternately is generated in the inner circumferential space of the permanent magnet.
A cylindrical protective ring 3 is fitted in close contact with each inner peripheral surface of each permanent magnet 2. A molding material 4 is filled between both end sides of each permanent magnet 2 in the direction of the rotation axis BB and between adjacent permanent magnets 2. A plurality of permanent magnets 2 and a protective ring 3 are fixed to the inner peripheral wall surface of the cylindrical portion of the flywheel 1 by the molding material 4.

The stator 11 is provided between a stator iron core 8 formed of a hollow cylindrical laminated thin steel plate 6 and a single plate 7 disposed on both sides, a power generation coil 9, and the power generation coil 9 and the single plate 7. Insulating material 10 is used. As this insulating material 10, for example, a resin molding material or epoxy powder coating is used.
The power generation coil 9 is configured by winding a conductive wire whose surface is enamel-coated around a stator core 8. The power generation coil 9 is a three-phase power generation coil, and each phase coil portion is connected by a delta connection.
Each lead wire 12 of the power generation coil 9 is electrically connected to a lead wire 13 for external output via a connecting portion 14. In the connection portion 14, after crimping the crimp terminal, the end portion of the lead wire 12 and the end portion of the lead wire 13 are connected by soldering.
Each lead wire 12 is led out from the opening side of the flywheel 1 and is protected by a protective tube 16. The connection portion 14 is protected by being covered with a protective tube 17. The lead wire 13 is protected by being covered with a protective tube 18. The connecting portion 14 is covered with two layers of protective tubes 17 and 18.
Each of the protective tubes 16, 17, and 18 is excellent in heat resistance and insulation, and is configured by impregnating a tube woven with polyester fiber with varnish.

Both sides of the connecting portion 14 are fixed by a flat annular first clamp member 15A and a second clamp member 15B.
The first clamp member 15 </ b> A is fixed to the stator core 8 with a screw 19 at the base end portion with the lead wire 12 interposed therebetween. The second clamp member 15 </ b> B is fixed to the stator core 8 with a screw 19 at the base end portion with the lead wire 13 interposed therebetween.

  In the magnet generator configured as described above, the flywheel 1 rotates in conjunction with the rotating shaft driven to rotate by the internal combustion engine, and electric power is generated in the power generating coil 9 by the alternating magnetic field generated by the permanent magnet 2 at that time. The AC output at this time is rectified by a rectifying diode (not shown) and fed to a load such as an in-vehicle battery.

According to the magnet generator having the above-described configuration, by fixing both sides of the connecting portion 14 with the clamp members 15A and 15B, from the fixed end (first clamp member 15A) to the fixed end (second clamp member 15B). The distance can be shortened, the excitation force to the connection part 14 can be reduced, and the occurrence of breakage and disconnection in the connection part 14 and its vicinity can be reduced.
Further, since the clamp members 15A and 15B fix the connecting portion 14 with the lead wire 12 and the lead wire 13 interposed therebetween, a stable fixing force can be obtained with respect to the connecting portion 14.

Embodiment 2. FIG.
4 is a front view showing a magnet generator according to Embodiment 2 of the present invention.
In this embodiment, the clamp member 15 </ b> C is composed of a single member, and a window 20 is formed at a portion facing the connection portion 14.
Other configurations are the same as those in the first embodiment.

According to the magnet generator according to this embodiment, both sides of the connecting portion 14 are fixed at both sides in the circumferential direction of the clamp member 15C, and, similarly to Embodiment 1, from the fixed end to the fixed end. The distance can be shortened, the excitation force to the connection part 14 can be reduced, and the occurrence of breakage and disconnection in the connection part 14 and its vicinity can be reduced.
In addition, since the clamp member 15C is composed of one member, the number of parts can be reduced and the assemblability can be improved.
Moreover, since the window 20 is formed in the site | part facing the connection part 14, the electrical short circuit with the connection part 14 and the clamp member 15C can be prevented.

Embodiment 3 FIG.
5 is a front view showing a magnet generator according to Embodiment 3 of the present invention, and FIG. 6 is a partial side view when the stator 11 is viewed from the direction of arrow A in FIG.
In this embodiment, ribs 21 projecting inward in the radial direction of the protective tube 18 and extending in the radial direction are formed on both sides in the circumferential direction of the clamp member 15D so as to face each other.
Other configurations are the same as those in the second embodiment.

According to the magnet generator of this embodiment, the same effect as that of the magnet generator of Embodiment 2 can be obtained, and the rib 21 for reinforcing the clamp member 15D is provided on the clamp member 15D. Therefore, the rigidity of the clamp member 15D is improved, the amount of bending of the clamp member 15D is reduced, and a decrease in fixing force is suppressed.
Further, since the rib 21 protrudes inward in the radial direction of the protective tube 18 and bites into the protective tube 18, the fixing force is further improved.

It is a front view which shows the magnet generator by Embodiment 1 of this invention. It is arrow sectional drawing along the II-II line | wire of FIG. FIG. 2 is a partial side view when the stator of FIG. 1 is viewed from the direction of arrow A. It is a front view which shows the magnet generator by Embodiment 2 of this invention. It is a front view which shows the magnet generator by Embodiment 3 of this invention. FIG. 6 is a partial side view when the stator of FIG. 5 is viewed from the direction of arrow A.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Flywheel, 2 Permanent magnet, 8 Stator core, 9 Generator coil, 11 Stator, 12 Lead wire, 13 Lead wire, 14 Connection part, 15A 1st clamp member, 15B 2nd clamp member, 15C, 15D Clamp member, 20 windows, 21 ribs.

Claims (6)

A bowl-shaped flywheel,
A plurality of permanent magnets fixed to the inner peripheral wall surface of the flywheel;
A stator core provided on the inner diameter side of the flywheel and having an outer peripheral surface facing the permanent magnet;
A power generation coil formed by winding a conductive wire around the stator core;
In the magnet generator including the lead wire for the external output and the lead wire for external output electrically connected via the connecting portion,
Both sides of the connecting part are fixed by a clamp member.   The magnet generator according to claim 1, wherein the clamp member fixes both sides of the connecting portion with the lead wire and the lead wire interposed therebetween.   The magnet generator according to claim 1, wherein the clamp member is configured as a single member that fixes both sides of the connection portion.   The magnet generator according to claim 3, wherein the clamp member has a window formed at a portion facing the connection portion.   The magnet generator according to any one of claims 1 to 4, wherein a reinforcing rib is formed on the clamp member.   The magnet generator according to claim 1, wherein the rib protrudes inward in the radial direction of the lead wire and the lead wire.

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