JPH0135593Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a stator for a magnet generator attached to an internal combustion engine.

[Prior Art] Generally, a magnet generator attached to an internal combustion engine is provided with an exciter coil used as a power source for an ignition device for the internal combustion engine. exciter coil,
In particular, the exciter coil used in capacitor discharge type ignition devices has a number of turns of 3,000 to 4,000 turns, and generates a high voltage of 1.5 to 2.0 KV in a no-load state, and a high voltage of around 350 V even in a loaded state. . Therefore, in this type of generator, it is necessary to sufficiently strengthen the insulation between the terminals connecting the winding start and winding end of the exciter coil, respectively.
In conventional magnet generators, a pair of terminals are fixed to the flange of the bobbin around which the exciter coil is wound, and the winding start and winding end of the exciter coil are connected to both terminals. It is difficult to maintain a wide distance between the coils, and the terminals connecting both ends of the exciter coil are usually arranged close to each other.

[Problem to be solved by the invention] When the terminals connecting the winding start and winding end of the exciter coil are close to each other in this way,
If metal chips were attached to the vicinity of the terminals, the insulation between the two terminals would become poor, resulting in poor ignition performance or misfires. Particularly when the generator is used in oil, oil mixed with metal chips produced by wear of the rotating shaft of the engine adheres to the terminals, which tends to cause poor insulation. Conventionally, in order to prevent this, insulating resin was attached to cover the terminals and the resin was cured, but it took a long processing time to attach and cure the resin to cover the terminals. Therefore, there was a drawback that the manufacturing efficiency of the stator was reduced. Furthermore, in the case of a stator in which the terminals are covered with resin as described above, the resin may peel off due to vibrations of the engine or the like, resulting in poor reliability.

An object of the present invention is to provide a stator for a magnet generator for an internal combustion engine that eliminates the above-mentioned drawbacks by strengthening the insulation between the terminals connecting the winding start and winding end of an exciter coil.

[Means for Solving the Problems] The stator of a magnet generator for an internal combustion engine, which is the subject of the present invention, has a plurality of salient poles provided on the side surface of an iron core yoke part and around which coils for general loads are wound. an exciter coil core provided on the side surface of the core yoke portion in line with a plurality of salient pole portions; an exciter coil bobbin fixed to the exciter coil core; and an exciter coil bobbin wound around the exciter coil bobbin. and an exciter coil. The exciter coil bobbin includes a body for winding a coil and a pair of flanges provided at both ends of the body. One of the flanges of the exciter coil bobbin located on the core yoke side has a winding start connection terminal and a winding terminal for connecting the winding start and winding end of the exciter coil to a part extending in one direction in the stacking direction of the core yoke. The end connection terminals are lined up and fixed.

In the present invention, a shielding plate is provided on one of the flanges, interposed between the winding start connection terminal and the winding end connection terminal and shielding both terminals from each other.
Further, a groove is provided in one of the collar portions at a position adjacent to the shielding plate between the winding start connection terminal and the winding end connection terminal. The groove is shaped to extend from the outer end of one of the flanges toward the body for coil winding so as to increase the creepage insulation distance between the winding start connection terminal and the winding end connection terminal. .

The above-mentioned shielding plate is provided to strengthen the insulation between the terminals connecting the winding start and winding end of the exciter coil, and this shielding plate may be provided integrally with the flange of the bobbin. A shielding plate formed separately from the flange of the bobbin may be fixed to the flange by appropriate means.

[Function of the invention] By providing the shielding plate as described above, it is possible to increase the creepage insulation distance between the winding start connection terminal and the winding end connection terminal that connect the winding start and winding end of the exciter coil, respectively. The insulation between both terminals can be strengthened, and even if oil containing metal powder or the like adheres, the insulation between both terminals will not deteriorate. In particular, if the above-mentioned groove is formed adjacent to the shielding plate, not only can the creepage insulation distance be sufficiently long, but also this groove can prevent oil, etc. containing metal powder from getting over the shielding plate, and can also be used for shielding. Since it acts to cut off oil and the like that have passed over the board, the insulation between both terminals can be further strengthened.

[Embodiments] Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a front view of a stator for a magnet generator according to the present invention. In the figure, 1 indicates a core yoke portion 2 formed in a regular octagonal shape, and a radial direction from seven side surfaces of the yoke portion 2. Salient pole portions 3a to 3 provided to protrude from
This stator core 1 is constructed by laminating a predetermined number of steel plates, and has a salient pole portion 3.
Pole piece portions 4a to 4g are provided at the tips of a to 3g. A hole 5 is provided in the center of the yoke portion 2 for passing the rotating shaft of a magnet rotor (not shown) through it, and a hole 5 is provided around the hole 5 for inserting a bolt when attaching the stator to an engine case, etc. A mounting hole 6 is provided. Generating coils 7a to 7g for general loads are wound around the salient pole parts 3a to 3g, respectively, and these coils are connected to an appropriate number of phases and used as coils for driving a load such as a lamp.

A dovetail groove 8 is provided so as to open on the other side of the yoke portion 2, and a dovetail portion 9A provided at the base of the exciter coil core 9 is press-fitted into the groove 8. As shown in FIG. 2, the exciter coil iron core 9 is constructed by laminating a large number of steel plates 11 of a predetermined shape between a pair of side plates 10, 10 punched into a predetermined shape. side plate 10,10
It is also caulked with a rivet 12, and a pole piece 13 (see FIG. 1) is provided at the tip. Flange portions 10A, 10B are provided by bending a portion of the side plates 10, 10 at a substantially right angle to the outside, and the body 14A for coil winding and the collar portion are formed so as to cover the flanges and the outer surface of the iron core 9. An exciter coil winding bobbin 14 consisting of 14B and 14C is integrally formed with the iron core 9 by injection molding of resin.

The collar portion 14C of the bobbin 14 on the yoke portion 2 side has a third
As shown in the figure, winding start connection terminals 15 and winding end connection terminals 16, which are approximately U-shaped, are buried side by side with their respective ends 15a, 15b and 16a, 16b protruding outside. There is. The winding start end 17a and winding end 17b of the exciter coil 17 wound around the coil winding body 14A of the bobbin 14 are connected to one end 15a of the winding start connection terminal 15 and the winding end connection terminal, respectively. 16
It is wrapped around one end 16a of and soldered to it. Further, core wires of external lead wires 18 and 19 are wound around and soldered to the other end 15b of the winding start connection terminal 15 and the other end 16b of the winding end connection terminal 16, respectively.

In the present invention, the portion of the flange 14C located between the winding start connection terminal 15 and the winding end connection terminal 16 is made to protrude in the axial direction of the stator, so that the shielding plate 20 is connected to the flange 14C. The shielding plate 20 shields the terminals 15 and 16 from each other. Terminal 1 like this
If a shielding plate is provided between 5 and 16, the creepage insulation distance between both terminals can be increased, so the insulation between both terminals can be strengthened, and oil containing metal powder can be prevented near both terminals. Even if it adheres, the insulation between both terminals will not become defective. Further, in this embodiment, in the portion of the collar portion 14C adjacent to the shielding plate 20,
A groove 21 is provided that extends from the outer end of the collar portion 14C toward the exciter coil winding body portion 14A. When such a groove 21 is provided, the terminals 15, 1
Since the creepage insulation distance between the terminals 6 and 6 can be further increased, the insulation between both terminals can be further strengthened. The grooves 21 also function to prevent oil and the like containing metal powder from getting over the shield plate 20 and to cut off the oil and the like that have gotten over the shield plate 20. Therefore, by forming the groove 21 in the flange adjacent to the shielding plate 20, the insulation between both terminals can be further strengthened.

4A and 4B show another embodiment of the present invention, in which the shielding plate 20 is connected to the terminal 15,
20A of plate-like parts which shield between 16 and the plate-like part 20A
The projection 20B of the shielding plate 20 is press-fitted into a hole 22 provided in the collar 14C of the bobbin 14 of the exciter coil. A through hole 20C is formed in the shielding plate 20, and the external lead wire 18 is inserted and held in this through hole.

When the shield plate part 20 is provided integrally with the collar part 14C of the bobbin 14 as in the embodiment shown in FIGS. However, as in the embodiment shown in FIG. 4, the shielding plate 20 is formed separately from the bobbin 14, and the exciter coil 17 is wound around the bobbin 14. After removing the flange 14C of the bobbin 14
When the shielding plate 20 is attached to the shielding plate 2
Since the width W of the plate-like portion 20A of 0 can be made sufficiently wide, the insulation between the terminals 15 and 16 can be further strengthened.

The stator of the above embodiment is attached to the case of the engine, etc., and the magnetic poles of the magnet rotor (not shown) attached to the output shaft of the engine are connected to the pole pieces 4a to 4g and 1.
3 with a predetermined gap in between.

In the above explanation, we used an external rotor type magnet generator in which the magnet rotor rotates on the outside of the stator; The present invention can be similarly applied to the stator of a generator. In this case, each salient pole portion protrudes radially inward from the inner periphery of the annular yoke portion.

[Effects of the invention] As described above, according to the invention, the shield plate interposed between the winding start connection terminal and the winding end connection terminal that connect the winding start and winding end of the exciter coil, respectively, is connected to the flange of the bobbin. Since the creepage insulation distance between both terminals has been increased by providing a There is an advantage that there is no In particular, a flange is installed between the winding start connection terminal and the winding end connection terminal and at a position adjacent to the shielding plate to increase the creepage insulation distance between the winding start connection terminal and the winding end connection terminal. Forming a groove extending from the outer end of the coil winding body toward the coil winding body increases the creepage insulation distance of the shielding plate and increases the creepage insulation between the winding start connection terminal and the winding end connection terminal. The distance can be made long enough. Furthermore, this groove serves to prevent oil, etc. containing metal powder from getting over the shielding plate, and also to cut off oil, etc. that has gotten over the shielding plate, so that the insulation between both terminals can be further strengthened.

[Brief explanation of the drawing]

Figure 1 is a plan view showing an embodiment of the invention, Figure 2 is a plan view showing an embodiment of the present invention;
The figure is a cross-sectional view taken along the line -- in FIG. 1, FIG. 3 is a front view showing the vicinity of the flange of the bobbin of the exciter coil of the same embodiment, and FIG. 4A is the flange of the bobbin of another embodiment of the present invention. FIG. 4B is a front view showing the vicinity partially in section, and a perspective view of the shielding plate used in the same embodiment. 1...Stator core, 2...Yoke part, 3a to 3g
...Salient pole portion, 7a to 7g...Generating coil, 9...
Iron core for exciter coil, 14... Bobbin for winding the exciter coil, 14c... Flange, 15... Terminal for connection at the start of winding, 16... Terminal for connection at the end of winding, 17... Exciter coil, 17a... Exciter coil Start of winding, 17b... End of winding of exciter coil, 20... Shielding plate.

Claims (1)

[Claims for Utility Model Registration] A plurality of salient pole portions provided on a side surface of an iron core yoke portion and around which a general load coil is wound; It has an exciter coil core arranged side by side, an exciter coil bobbin fixed to the exciter coil core, and an exciter coil wound around the exciter coil bobbin, and the exciter coil bobbin is a coil. It includes a winding body and a pair of flanges provided at both ends of the body, and one of the flanges located on the core yoke side of the exciter coil bobbin is provided with the core yoke. A stator for a magnet generator for an internal combustion engine, in which a winding start connection terminal and a winding end connection terminal for connecting the winding start and winding end of the exciter coil are fixedly arranged side by side in a part extending in one direction in the stacking direction of the exciter coil, A shielding plate that is interposed between the winding start connection terminal and the winding end connection terminal and shields both terminals from each other is provided on the one flange, and the one flange is provided with the winding start connection terminal and the winding end connection terminal. A groove is provided at a position adjacent to the shielding plate between the terminal and the winding end connection terminal, and the groove is configured to increase the creepage insulation distance between the winding start connection terminal and the winding end connection terminal. A stator for a magnet generator for an internal combustion engine, characterized in that the stator has a shape that extends from the outer end of the one flange toward the coil winding body.