JP2007221928A - Magneto generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a magneto generator, capable of reducing the axial dimension of a stator and preventing the deposition of degraded matter, such as oil mist. <P>SOLUTION: In the magneto generator, a lead cramp 13 has a base end, fixed on a stator iron core with a screw 14 and an opening opened on a power generation coil 3 side. The lead cramp 13 covers a lead wire 11 in which one end is electrically connected to a leading line, and the other end is electrically connected to electrical equipment, and presses the lead wire 11 against the power generating coil 3 side through the opening. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a magnet generator in which lead wires connected to lead wires of respective phases of a power generating coil are fastened by lead clamps.

Conventionally, a bowl-shaped flywheel that rotates around the rotation axis, a plurality of permanent magnets that are fixed to the inner peripheral wall surface of the flywheel and rotate with the flywheel, and are provided inside the permanent magnets in the radial direction. A stator core having a plurality of teeth projecting outward, a power generation coil having a lead wire wound around each of the teeth and drawn out from the stator core, and one end portion of the lead wire A lead wire that is electrically connected to the other end and electrically connected to an electrical device, and a lead clamp that is secured to the stator core by a fastening means and tightened to the lead wire Is known (for example, refer to Patent Document 1).
In this lead clamp, the lead wire is positioned with respect to the stator core by sandwiching both sides of the lead wire in the rotational axis direction, and the vibration resistance strength of the lead wire is ensured.

JP-A-8-126276 (FIG. 7)

In the magnet generator described above, since the lead clamp sandwiches both sides of the lead wire, there is a problem that the axial dimension of the stator composed of the stator core and the power generating coil is large.
In addition, a gap is formed between the lead clamp and the power generation coil, and it is considered that a deteriorated material such as oil mist is accumulated in the gap and the lead wire is disconnected due to the deposition.

  An object of the present invention is to solve the above-described problems, in which the dimension of the stator in the axial direction is reduced, and deterioration products such as oil mist are not deposited in the gaps. The purpose is to obtain a magnet generator.

  In the magnet generator according to the present invention, a bowl-shaped flywheel that rotates around the rotation axis, a plurality of permanent magnets that are fixed to the inner peripheral wall surface of the flywheel and rotate with the flywheel, A stator core having a plurality of teeth provided on the inner side and projecting radially outward; and a power generation coil having a lead wire wound around each of the teeth and led out from the stator core; A lead wire having one end portion electrically connected to the lead wire and the other end portion electrically connected to an electric device, and a base end portion fixed to the stator core by fastening means and the power generation A lead clamp having an opening opened on the coil side, the lead clamp covering the lead wire and leading the lead wire through the opening. And it presses the power generation coil side.

  According to the magnet generator according to the present invention, the dimension of the stator in the axial direction is reduced, so that a deteriorated product such as oil mist does not accumulate in the gap.

  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 stator of a magnet generator according to Embodiment 1 of the present invention, FIG. 2 is a side sectional view of FIG. 1, FIG. 3 is an enlarged view of a main part of FIG. 1, and FIG. It is a figure when it sees from A. FIG.
The magnet generator includes a rotor (not shown) connected to the internal combustion engine, and a stator 1 provided inside the rotor and attached to a bracket (not shown).
The rotor includes a bowl-shaped flywheel and a permanent magnet connected to a rotating shaft (not shown) that is rotationally driven by the internal combustion engine.

  On the inner peripheral wall surface of the cylindrical portion of the flywheel, there are two permanent magnets magnetized in the order of N pole, S pole and N pole, and two permanent magnets magnetized in the order of S pole, N pole and S pole. Alternately, they are fixed by a resin material 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.

The stator 1 includes a hollow cylindrical stator core 2 and a three-phase power generation coil 3. Teeth 4 are formed on the outer periphery of the stator core 2 so as to protrude radially outward in the radial direction at equal intervals.
A stator core 2 in which a plurality of teeth 4 are formed on the outer peripheral portion is a laminated core 5 formed by laminating a plurality of hollow thin magnetic steel plates, which are cold rolled steel plates, along the direction of the rotation axis, The laminated iron core 5 includes a first end plate 6 and a second end plate 7 which are stacked in close contact with both side surfaces.
The first end plate 6 and the second end plate 7 that are hollow and made of a cold-rolled steel plate or the like are bent at the outer peripheral edge toward the power generation coil 3 in order to hold the power generation coil 3. .
The first end plate 6, the second end plate 7, and the laminated iron core 5 are formed with three through holes 8 penetrating in parallel with the rotation axis. The laminated core 5, the first end plate 6, and the second end plate 7 are formed by a bolt (not shown) penetrating through the through hole 8 and a nut (not shown) screwed to the end of the bolt. Are integrated.

The power generating coil 3 is configured by winding a conductive wire having a surface enamel-coated on the peripheral side surface of the tooth 4 of the stator core 2, and the peripheral side surface on which the conductive wire is wound is covered with a resin molding material 9. ing.
The lead wires 16 of each phase of the power generation coil 3 extending from the stator core 2 are covered with the first protective tube 10. The lead wire 16 of each phase is electrically connected to the three lead wire portions 11a of the lead wire 11 for leading out to an electric device (not shown) in the first protective tube 10 respectively. The end portion of the lead wire 11 extending in the tangential direction of the stator 1 is covered with a second protective tube 12.

  A base end portion of a lead clamp 13 is fixed to the stator core 2 by a screw 14 that is a fastening means. This resin lead clamp 13 has a bent portion 13a whose outermost diameter portion is bent toward the power generating coil 3, and has an opening at the power generating coil 3 side. The lead clamp 13 covers the lead wire 11 and presses the lead wire 11 toward the coil end 3 a side of the generator coil 3 through the opening. The lead clamp 13 is provided between adjacent teeth 4 when viewed along the direction of the rotation axis.

  In the magnet generator configured as described above, the flywheel rotates in conjunction with the rotating shaft driven to rotate by the internal combustion engine, and electric power is generated in the generator coil 3 by the alternating magnetic field generated by the permanent magnet. 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 according to this embodiment, the lead clamp 13 covers the lead wire 11 covered with the second protective tube 12, and the lead wire 11 is connected to the coil end 3a side of the generator coil 3 through the opening. Therefore, the lead wire 11 is in close contact with the power generation coil 3 via the second protective tube 12, and the dimension of the stator 1 in the axial direction is reduced.
In addition, since there is no gap between the lead wire 11 and the coil end 3a of the power generation coil 3, a deteriorated material such as oil mist accumulates in the gap, thereby preventing the lead wire 11 from being disconnected.

In addition, since the lead clamp 13 is provided between adjacent teeth 4 when viewed along the direction of the rotation axis, the lead wire 11 pressed by the lead clamp 13 is bent and deformed between the teeth 4. The adjacent teeth 4, the lead clamp 13 and the lead wire 11 are more integrated. Accordingly, the axial dimension of the stator 1 is further reduced, the circumferential displacement due to the vibration of the lead wire 11 is prevented, and the vibration frequencies of the teeth 4, the lead clamp 13 and the lead wire 11 are varied. The resulting disconnection of the lead wire 11 and lead wire 16 is also reduced.
Moreover, since the lead wire 11 has the bending part 13a by which the outermost diameter part was bent by the side of the generator coil 3, the radial position adjustment of the lead wire 11 is carried out in the bending direction of the bending part 13a. This can be done easily by adjusting the length.

Embodiment 2. FIG.
FIG. 5 is a side view of an essential part of a magnet generator according to Embodiment 2 of the present invention.
In this magnet generator, the resin lead clamp 20 has protrusions 20a formed on both side edges of the surface to be pressed toward the coil end 3a.
Other configurations are the same as those in the first embodiment.
In this embodiment, protrusions 20a are formed on both side edges of the lead clamp 20, and the lead wire 11 is pressed toward the coil end 3a by these two protrusions 20a. Can be prevented in particular.

Embodiment 3 FIG.
6 is a side view of an essential part of a magnet generator according to Embodiment 3 of the present invention.
In this magnet generator, the resin lead clamp 22 is bent into a V shape at the center, and presses the second protective tube 12 at the center 21a and both ends 21b.
Other configurations are the same as those in the first embodiment.
In this embodiment, since the lead clamp 21 is bent in a V shape, the lead wire 11 pressed by the lead clamp 21 penetrates more deeply between the teeth 4 than in the first embodiment, and is adjacent to the lead wire 21. Teeth 4, lead clamp 21, and lead wire 11 are more integrated as compared with the first embodiment. Therefore, the disconnection of the lead wire 11 and the lead wire 16 due to the different vibration frequencies of the teeth 4, the lead clamp 13, and the lead wire 11 is further reduced as compared with the first embodiment.

Embodiment 4 FIG.
FIG. 7 is a side view of an essential part of a magnet generator according to Embodiment 4 of the present invention.
In this magnet generator, the lead clamp 22 made of rolled steel sheet has a concavo-convex portion 22a extending in the radial direction at the center of the surface pressed to the coil end 3a side.
Other configurations are the same as those in the first embodiment.
In this embodiment, the lead clamp 22 has an uneven portion 22a formed in the center, so that the lead wire 11 pressed by the lead clamp 21 penetrates deeper between the teeth 4 than in the first embodiment. The adjacent teeth 4, the lead clamp 21 and the lead wire 11 are more integrated as compared with the first embodiment.
The uneven portion 22a is easily formed by press working.

Embodiment 5 FIG.
FIG. 8 is a side view of an essential part of a magnet generator according to Embodiment 5 of the present invention.
In this magnet generator, a rolled steel plate lead clamp 23 has a curved portion 23a that is pressed toward the coil end 3a.
Other configurations are the same as those in the first embodiment.
In this embodiment, the lead clamp 23 is formed with a curved portion 23a, and the lead wire 11 pressed by the lead clamp 23 can be inserted between the teeth 4 without applying excessive stress.

Embodiment 6 FIG.
FIG. 9 is a side view of an essential part of a magnet generator according to Embodiment 6 of the present invention.
In this magnet generator, a rolled steel plate lead clamp 24 is formed with a concavo-convex portion 24b extending in the radial direction at the center of the surface pressed to the coil end 3a side, and at both ends on the side opposite to the coil end 3a. A bent portion 24a is formed.
Other configurations are the same as those in the first embodiment.

In this embodiment, since the uneven portion 24b is formed in the center portion, the lead wire 11 pressed by the lead clamp 24 enters deeper between the teeth 4 than in the first embodiment, and the adjacent teeth 4 The lead clamp 24 and the lead wire 11 are more integrated as compared with the first embodiment.
In addition, since the lead clamp 24 is formed with bent portions 24a at both ends, the rigidity of the lead clamp 24 is increased, and the amount of bending deformation of the lead clamp 24 that occurs when the lead clamp 24 is pressed toward the coil end 3a. And the pressing force against the lead wire 11 is more reliably transmitted.

Embodiment 7 FIG.
FIG. 10 is a side view of an essential part of a magnet generator according to Embodiment 7 of the present invention.
In this magnet generator, the surface that is pressed toward the coil end 3 a side of the lead clamp 24 of the sixth embodiment is surrounded by the elastic member 15.
Other configurations are the same as those in the first embodiment.

This embodiment has the same lead clamp 24 as that of the sixth embodiment, and has the same effect as that of the sixth embodiment.
Further, the dimension of the power generating coil 3 in the axial direction of the stator 1 varies depending on the winding condition of the conducting wire, etc., but the elastic member 15 surrounding the lead clamp 24 absorbs this variation, and the lead clamp 24 The lead wire 11 can be stably pressed to the coil end 3a side.

  In each of the above-described embodiments, the lead clamps 13, 20, 21, 22, 23, and 24 are all described as being disposed between adjacent teeth 4 when viewed along the direction of the rotation axis. However, if only focusing on eliminating the gap between the lead clamp and the coil end of the power generation coil, the lead clamp is arranged on the teeth 4 when viewed along the direction of the rotation axis. Of course, there may be.

It is a front view which shows the stator of the magnet generator by Embodiment 1 of this invention. It is a sectional side view of FIG. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a figure when FIG. 1 is seen from the arrow A. It is a principal part side view of the magnet generator by Embodiment 2 of this invention. It is a principal part side view of the magnet generator by Embodiment 3 of this invention. It is a principal part side view of the magnet generator by Embodiment 4 of this invention. It is a principal part side view of the magnet generator by Embodiment 5 of this invention. It is a principal part side view of the magnet generator by Embodiment 6 of this invention. It is a principal part side view of the magnet generator by Embodiment 7 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Stator, 2 Stator iron core, 3 Power generation coil, 4 teeth, 5 Laminated iron core, 11 Lead wire, 13, 20, 21, 22, 23, 24 Lead clamp, 13a Bending part, 14 Screw (tightening means) , 15 Elastic member, 16 Lead wire, 20a Protrusion.

Claims (5)

A bowl-shaped flywheel that rotates around a rotation axis;
A plurality of permanent magnets fixed to the inner peripheral wall surface of the flywheel and rotating together with the flywheel;
A stator core provided inside the permanent magnet and having a plurality of teeth projecting radially outward;
A power generating coil having a lead wire that is wound around each of the teeth and drawn out from the stator core; and
A lead wire having one end electrically connected to the lead wire and the other end electrically connected to an electrical device;
A base end portion is fixed to the stator core by a fastening means, and has a lead clamp having an opening portion opened to the power generation coil side;
The lead clamp covers the lead wire and presses the lead wire toward the generator coil through the opening.   The magnet generator according to claim 1, wherein the lead clamp is disposed between adjacent teeth when viewed along the direction of the rotation axis.   The magnet generator according to claim 1, wherein the lead clamp has a bent portion whose outermost diameter portion is bent toward the power generating coil.   The magnet generator according to claim 1, wherein the lead clamp has a plurality of protrusions protruding toward the power generation coil.   The magnet generator according to any one of claims 1 to 4, wherein an elastic member is provided between the lead clamp and the lead wire.

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