JP2623438B2 - Connection structure between coil wire and lead wire - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure between a coil wire and a lead wire, and more particularly to a connection structure which is effective when used for a stator of a magnet generator mounted on an internal combustion engine.

[0002]

2. Description of the Related Art Generally, as a stator of a magnet generator mounted on an internal combustion engine in a vehicle such as a motorcycle,
A stator core in which a plurality of salient poles are radially arranged on an annular core body, a coil bobbin attached to the stator core so as to cover a part of the core body and each salient pole, and a salient pole of the coil bobbin. Some include a wound coil group. In the stator of the magnet generator, it is necessary to electrically connect a coil terminal of the coil to a lead wire in order to transmit the generated power to a load such as a battery or a headlight of the vehicle.

Conventionally, as a structure for connecting a coil terminal and a lead wire in a stator of a magnet generator, a connection recess for holding a coil wire, a connection terminal fitted into the connection recess and electrically connected to the coil wire. And
There is a connection structure between a coil wire and a lead wire in which a lead wire is electrically connected to the coil wire material via a connection terminal. And, when electrically connecting the lead wire to the connection terminal, a poke-in terminal piece, a crimp barrel terminal piece, and a terminal piece with a post are electrically connected to the conductor of the lead wire and connected to the tip of the lead wire, It has been proposed to adopt a structure in which these terminal pieces are connected to the connection terminals.

An example of this type of connection structure between a coil wire and a lead wire is disclosed in Japanese Utility Model Laid-Open Publication No. 62-1657.
No. 64 and Japanese Patent Application Laid-Open No. 61-22744.

[Problems to be solved by the invention]

However, when the above-mentioned terminal piece is used for a stator of a magnet generator used for a vehicle such as a motorcycle, the operating environment temperature is as high as about 150 ° C. , The contact resistance is increased and the heat resistance is insufficient, and the reliability is reduced.

SUMMARY OF THE INVENTION An object of the present invention is to provide a connection structure between a coil wire and a lead wire which can maintain high reliability even under a use condition of high temperature and severe vibration.

[0007]

Connection structure of a coil wire and a lead wire according to the present invention According to an aspect of the connection structure of the coil wire and a lead wire which leads via imaging line terminal is electrically connected to the coil wire In the above, the coil wire (7)
And the first connection recesses (11, 12) for holding
The coil wire rod is inserted into wire recesses (11, 12).
The first connection terminal (2) electrically connected to (7)
1) and a lead having one end connected to the lead wire (8).
Terminal (30, 30A) and this lead terminal
Second connection recess into which the other end of the socket (30, 30A) is fitted.
(13) and inserted into the second connection concave portion (13).
Electrically connected to the lead terminals (30, 30A).
And a second connection terminal (22).
The second connection recess of the lead terminal (30, 30A)
A rod-shaped coupling portion (3
6) are integrally formed, and the connecting portion (36)
A second connection terminal disposed in the connection recess (13);
A slit (25) is formed in the terminal (22).
The connecting portion (3) of the lead terminal (30, 30A)
6) is press-fitted into this slit (25) and electrically connected
And the second connection terminal (22) is connected to the second connection terminal (22).
It is characterized by being integrally connected to one connection terminal (21) .

[0008]

According to the above-described means, the coil wire is electrically connected to the first connection terminal, and the lead wire is electrically connected to the second connection terminal via the lead terminal. Since the first connection terminal and the second connection terminal are integrally connected, the coil wire is electrically connected to the lead via the first connection terminal, the second connection terminal, and the lead terminal. become.

The lead terminal for connecting the lead wire to the coil wire is formed firmly and the second
Since the connection recesses are pressure input are mechanically firmly fixed, heat resistance and vibration resistance becomes extremely high. Therefore, the lead wire is in a state of being electrically connected to the coil wire material with high heat resistance and seismic resistance.
High reliability can be maintained with respect to contact resistance, heat resistance, and the like even in a use environment in which vibration is severe.

In addition, since the electrical connection of the coil wire to the lead terminal is performed by fitting into the coupling portion of the second connection terminal, a reduction in workability can be avoided.

[0011]

FIG. 1 is an exploded perspective view of a main part showing a connection structure between a coil wire and a lead wire according to an embodiment of the present invention. FIG.
3A shows the assembled state, FIG. 3A is a rear sectional view taken along line II-II in FIG. 3, FIG. 3B is a side sectional view in FIG.
FIG. 2C is an enlarged partial cross-sectional view of a portion c in FIG. FIG. 3 is a plan view showing a stator of a magnet generator in which the magnet generator is used.

In this embodiment, the connection structure between a coil wire and a lead wire according to the present invention is incorporated as a connection portion 10 into a stator 1 of a magnet generator. The stator 1 of the magnet generator includes a stator core 2 in which a plurality of salient pole portions A1 to A8 are radially arranged on an annular core body 3. The stator core 2 is formed by laminating a plurality of laminated plates made of a magnetic material, and is integrated by inserting and fastening a plurality of rivets in the thickness direction. An outer surface of the stator core 2 is covered with a coil bobbin 4 integrally formed by using an insulating resin. The coil bobbin 4 includes a main body 5 that covers the annular core main body 3,
And bobbin portions B1 to B8 which cover the salient pole portions A1 to A8. The bobbin portion B1~B8 and the coil 6 is wound around each of the two coil end 7 of the coil terminal 7 as coil wire of the coil 6, the connecting portion 10 of the coil wire and a lead wire described later Lead wire 8
Is electrically connected to

In the present embodiment, the connecting portion 10 between the coil wire and the lead wire according to the present invention is used as the coil wire of each coil 6 in the stator 1 of the magnet generator having the above-described configuration.
The coil terminals 7 are configured such that two coil terminals 7 are connected to one lead wire 8. The connection portion 10 between the coil wire and the lead wire includes two first connection recesses 11 and 12 for holding the coil terminal 7 as the coil wire in a positioned state, and a second connection recess for connecting to the lead wire. 13 is provided. Two first connection recesses 1
1 , 12 and one second connection recess 13 are coil bobbins 4
The main body 5 has a surface (hereinafter, referred to as an upper surface) opposite to the engine mounting surface, and is arranged side by side next to each other and opened in a vertical direction. Two first
The connection concave portions 11 and 12 and one second connection concave portion 13 are formed in a rectangular parallelepiped hole shape having a substantially square shape in plan view so that a press-contact terminal of a connection terminal described later can be press-fitted.

A coil terminal mounting groove 14 in which the coil terminal 7 can be mounted is vertically formed at an upper edge of each of the two first connection concave portions 11 and 12, and each coil terminal mounting groove 14 is provided with a coil. The terminal 7 is configured to be positioned and held in a fitted state. Further, on the bottom surfaces of the first connection concave portions 11 and 12, a support portion 15 is arranged along the groove line of the coil terminal mounting groove 14 and protrudes vertically upward. On the other hand, a lead terminal insertion hole 16 is continuously opened at the bottom of the second connection recess 13,
The lead terminal insertion hole 16 is formed so that a lead terminal described later can be inserted from the engine mounting surface side (hereinafter, referred to as a lower surface) of the coil bobbin main body 5.

Further, a connecting portion 10 between the coil wire and the lead wire is provided.
Has a first connection terminal 21 electrically connected to the coil terminal 7 as a coil wire, and a second connection terminal 22 electrically connected to a lead terminal described later. In the present embodiment, in order to connect the two coil terminals 7, 7, two first connection terminals 2 are used.
1 and 21 are prepared, and the two first connection terminals 21 and 21 are arranged side by side with one second connection terminal 22 so that the upper and lower ends thereof are aligned, and are integrally formed by the connection member 23. Are linked. In this embodiment,
Each first connection terminal 21 and second connection terminal 2
2 have the same structure, the structure will be described with reference to the first connection terminal 21 as a representative.

The first connection terminal 21 is constituted by using a press contact terminal 24. The press contact terminal 24 is formed of an elastic conductive material such as brass and is integrally formed into a substantially U-shape by press working. I have. And the press contact terminal 24
A slit 25 is formed in a substantially central portion of a lower end portion of the lower end of the upper end of the upper end in the vertical direction. The slit 25 is formed so that the coil terminal 7 can be press-fitted. A connecting portion of a lead terminal described later is press-fitted into the slit 25 of the second connection terminal 22. Further, a protrusion 26 for retaining is projected outward on the side surface of the press contact terminal 24.

Further, a connecting portion 1 between the coil wire and the lead wire
0 has a lead terminal 30 electrically connected to the lead wire 8. The lead terminal 30 is made of a conductive material having high mechanical strength, such as brass, and is integrally formed into a substantially hook shape by pressing. At the lower end of the lead terminal 30, a fixing portion 31 is formed in a substantially circular ring shape, and the inner diameter of the fixing portion 31 is set slightly larger than a female screw hole of a nut described later. A main body part 32 formed in a rectangular plate shape is provided on a part of the outer periphery of the fixed part 31 so as to protrude vertically upward. A cut-and-raised portion 33 for retaining is protruded at an intermediate height position of the main body portion 32. Further, the cut-and-raised part 33 of the main body part 32
A pair of engaging projections 34 is provided on each side of the pair.

At the upper end of the main body 32, a support portion 35 and a coupling portion 36 are integrally formed so as to cooperate to form a T-shape. It is arranged so as to be coaxial with the center line of the part 32. On the other hand, the connecting portion 36, which is a T-shaped horizontal piece, is formed in a rod shape having a substantially rectangular cross section, and tapered portions 37 for guiding are formed at four corners of a square.

Next, the assembling work of each component according to the above configuration and its operation will be described. With this explanation,
The details of the configuration of the connection portion 10 between the coil wire and the lead wire and the stator 1 of the magnet generator according to the present embodiment will be clarified.

The lead terminal 30 is previously inserted into the lead terminal insertion hole 16 continuous with the second connection recess 13 from the lower surface side of the stator core 2. At the time of this insertion, the nut 38 is sandwiched between the end surfaces of the fixing portion 31 of the lead terminal 30 on the stator core 2 side. When lead terminal 30 is inserted into the lead terminal insertion holes 16, cut and raised pieces 33 and the engaging projection 34 is Ridota
Since the engaging portion 36 of the lead terminal 30 is engaged with a part of the inner wall surface of the terminal insertion hole 16, the engaging portion 36 of the lead terminal 30 is mechanically securely fixed to the second connection recess 13. Then, the lead wire 8 is fixed to the fixing portion 31 of the lead terminal 30.
Are brought into contact with each other and fastened by the nut 38 and the bolt 39, so that the lead wire 8 is electrically connected to the lead terminal 30.

Each of the salient pole bobbins B1 to B of the coil bobbin 4
After the coil 6 is wound around the coil 8, for example, the coil terminals 7, 7 of the coils wound around the first salient pole bobbin portion B1 and the second salient pole bobbin portion B2 are arranged side by side with each other. The first connection recesses 11 and 12 are fitted into the coil terminal mounting grooves 14 and 14 in the first connection recesses 11 and 12, respectively, and are held in a positioning state. In this state, the coil terminal 7 is supported by the support unit 15 from below.

Thereafter, the two connection terminals 21 and 21 and one second connection terminal 2
2 is press-fitted into two first connection recesses 11 and 12 and one second connection recess 13 respectively. And two first
The connection terminals 21, 21 have two first connection recesses 11,
12, each coil end mounting groove 14
And each coil terminal 7 positioned and held by the support portion 15
Are press-fitted into the slits 25 of the press contact terminals 24. Due to the press-fitting of the coil end 7 into the slit 25, as shown in FIG. 2C, the enamel film 7a as an insulating film of the coil end 7 is peeled off by the edge of the slit 25. ID terminal 24
Are in direct contact with the conductor 7b of the coil terminal 7 and are in an electrically connected state. Accordingly, press contact terminals 24 without requiring the peeling operation of the enamel coating 7a, carp
It can be electrically connected to Le terminal 7.

When the second connection terminal 22 is pressed into the second connection recess 13, the connecting portion 36 of the lead terminal 30 is pressed into the slit 25 of the press-contact terminal 24. With the press-fitting of the joining portion 36 into the slit 25, the surface layer of the joining portion 36 is cut by the edge of the slit 25, so that the press-contact terminal 24 has a large contact area and strong contact with the joining portion 36. State. Therefore, the press contact terminal 24 is reliably electrically connected to the coupling portion 36 with a small contact resistance.

As described above, in this embodiment,
Two coil terminals 7, 7 are two first connection terminals 2
1 and 21, and one lead wire 8 is electrically connected to one second connection terminal 22 via a lead terminal 30. And two first
Since the connection terminals 21 and 21 and one second connection terminal 22 are integrally connected by a connection member 23, the two coil terminals 7 and 7 are connected to the lead wire 8 and the two first connection terminals 21. , 21, each connecting member 23, the second connection terminal 22, and the lead terminal 30.

According to the present embodiment, the lead terminal 30 for connecting the lead wire 8 to the coil terminal 7 is made of a material having high mechanical strength, such as brass, and is rigidly formed. Since it is fitted into the connection recess 13 and is mechanically firmly fixed, heat resistance and earthquake resistance are extremely high. Therefore, the lead wire 8 is connected to the coil terminal 7
Since it is electrically connected with high heat resistance and earthquake resistance at high temperatures, even in stators of magnet generators used in vehicles such as motorcycles, which are used at high temperatures and with severe vibration, contact resistance and High reliability with respect to heat resistance and the like can be maintained.

FIG. 4 is an exploded perspective view of a main part showing a connection structure between a coil wire and a lead wire according to another embodiment of the present invention.

The second embodiment is different from the first embodiment in that
Lies in that the lead terminal 30 A is configured to be fitted from above into the second connection concave portion 13A. That is,
A lead terminal insertion hole 16A is formed in a vertical groove shape on the side wall of the second connection recess 13A opposite to the first connection recess 12, and a lead terminal fixing hole 16B is formed on the upper surface of the coil bobbin 4 with a lead terminal insertion hole 16A. It is submerged so as to be continuous. And lead terminal 3
Fixing portion 31A of 0A is fitted to the lead terminal fixing hole 16B, a pair of cut-and-raised piece 33A projecting from the both side ends sides of the fixed portion 31A, 33A is Ridota
By locking on both side walls of the minal fixing hole 16B,
The lead terminal 30A has a lead terminal fixing hole 16
B is fixed. The main body 32A of the lead terminal 30A is inserted into the lead terminal insertion hole 16A, and the main body 32A is bent vertically upward at an intermediate portion. In this state, the joint 3 supported by the support 35
6 is equivalent to the state of the first embodiment. Therefore, also in the second embodiment, as in the first embodiment, the second
The connection terminal 22 is a joint 3 of the lead terminal 30.
6 will be combined. On the other hand, the lead wire (not shown) is electrically connected to the lead terminal 30A by screwing a bolt (not shown) into the nut 38 embedded in the lead terminal fixing hole 16B.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the invention.

[0029] For example, the first connection terminal 21 is not limited to Keru two set <br/>, it may be provided one or three or more.

The means for electrically connecting the lead wire 8 to the lead terminal 30 is not limited to using screwing,
Caulking or soldering may be used.

In the above embodiment, the case where the connection structure between the coil wire and the lead wire is used for the stator of the magnet generator has been described. However, the connection structure between the coil wire and the lead wire according to the present invention is not limited to this. Instead, it can be used for general rotating electric machines such as motors. In particular, the connection structure between a coil wire and a lead wire according to the present invention can provide excellent effects when used in a rotating electric machine or the like used under high temperature and severe vibration conditions.

[0032]

As described above, according to the present invention,
A lead for connecting the lead wire (8) to the coil wire (7)
The lead terminal (30) is formed rigidly and
It is fitted into the connection recess (13) and is mechanically firmly fixed.
And for that, it is possible to electrically connect with high heat resistance and vibration resistance of the lead wire to the coil wire, it is possible to improve reliability with respect to connection between the lead wire and the coil wire. In addition, the first connection term
Null (21) and second connection terminal (22)
In the connection recesses (11, 12) and the second connection recess (13)
By inserting, lead wire (8) and coil wire
(7) can be electrically connected to
Sex does not fall.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part showing a connection structure between a coil wire and a lead wire according to an embodiment of the present invention.

FIG. 2 shows the assembled state, and FIG.
FIG. 2B is a rear cross-sectional view along the line II, FIG. 2B is a side cross-sectional view of FIG. 2A, and FIG. 2C is an enlarged partial cross-sectional view of a portion c in FIG.

FIG. 3 is a plan view showing a stator of a magnet generator in which it is used.

FIG. 4 is an exploded perspective view of a main part showing a connection structure between a coil wire and a lead wire according to another embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Stator of magnet generator, 2 ... Stator core, 3 ... Core main body, 4 ... Coil bobbin, 5 ... Main body part, A1-A8 ...
Salient pole portion, B1 to B8 ... Salient pole bobbin portion, 6 ... Coil, 7 ...
Coil end (coil wire), 8: Lead wire, 10: Carp
Connection between lead wire and lead wire , 11, 12 ... 1st connection concave
Part , 13: second connection recess, 14: coil terminal mounting groove, 1
5 ... support part, 16, 16A ... lead terminal insertion hole,
16B: lead terminal fixing hole, 21: first connection terminal, 22: second connection terminal, 23: connecting member,
24 ... Press contact terminal, 25 ... Slit, 26 ... Protrusion, 30,
30A: Lead terminal, 31, 31A: Fixed part, 3
2, 32A ... body part, 33, 33A ... cut and raised piece,
Reference numeral 34 denotes a projection, 35 denotes a support portion, 36 denotes a connection portion, 37 denotes a tapered portion, 38 denotes a nut, and 39 denotes a bolt.

Claims (1)

(57) [Claims] 1. A first connection recess (11 leads via imaging line terminals to hold in the connection structure for a coil wire and a lead wire which is electrically connected to the coil wire, the coil wire (7),
12) and fitted into the first connection recesses (11, 12).
Connection that is electrically connected to the coil wire (7)
One end is connected to the terminal (21) and the lead wire (8).
The connected lead terminals (30, 30A)
The other end of the lead terminal (30, 30A) is inserted
A second connection recess (13), and the second connection recess (13)
Into the lead terminal (30, 30A)
A second connection terminal (22) to be electrically connected;
And the second connection of the lead terminal (30, 30A).
A rod-shaped coupling portion is provided at the end to be fitted into the concave portion (13).
(36) are integrally formed, and the connecting portion (36)
The second connection terminal (22) is disposed in the second connection recess (13), and the second connection terminal (22) has a slit (25).
Is formed, and the lead terminals (30, 30A) are formed.
The connecting portion (36) is press-fitted into the slit (25).
The second connection terminal (22) is electrically connected to the first connection terminal.
A connection structure between a coil wire and a lead wire, the connection structure being integrally connected to a null (21) .