JPS6145344Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to an engine ignition system in which a signal unit that generates an ignition signal and an ignition unit that performs an ignition function upon receiving the ignition signal from the signal unit are built into a housing. This relates to the arrangement and configuration of the terminal terminals.

Hereinafter, one embodiment of this invention will be described in detail with reference to FIGS. 1 to 6. In the figure, reference numeral 1 designates the housing of the power distribution device, which is made of aluminum or the like with good heat dissipation.As shown in FIG.
A pair of protrusions 1b serving as positioning portions are formed at two locations, and screw holes 1c are formed at two locations. 2 is a rotating shaft supported by the housing 1 via a bearing 3; 4 is a cylinder loosely fitted to the rotating shaft 2; 5 is a ring-shaped signal rotor fitted to the cylinder 4; As shown in Figure 2, the number of engine cylinders (4 cylinders in this example, so
2) protrusions 5a are formed. Reference numeral 6 denotes a movable plate that is rotatably supported on the housing 1 around the rotating shaft 2, and a connecting pin 7 is attached at one location of the movable plate.
is pivotally mounted, and a link 9 of a vacuum advance device 8 is loosely fitted onto this connecting pin 7. A stator 10 is fixed on the movable plate 6 via a permanent magnet 11, and has three protrusions 10a that can be opposed to each protrusion 5a of the rotor 5 with a space between them. Note that the protrusion 10a of the stator 10 is not formed on the side opposite to the rotation shaft 2 from the side where the link 9 is arranged. Reference numeral 12 denotes a signal unit fixed to the housing 1, which, as shown in FIG. 5, includes a bobbin portion 12a, a pair of support portions 12c having mounting holes 12b, and a pair of connector housing portions 12d extending from these support portions 12c. Furthermore, it has a pair of positioning portions 12e extending from the housing portion 12d and engaging with each protrusion 1b, and a cover portion 12f. These, the bobbin part 12a,
Mounting hole 12b, support part 12c, housing part 12
d. The positioning portion 12e is integrally molded from synthetic resin or the like. 14 and 15 are connector terminals fixed to the upper part of the bobbin part 12a of the signal unit 12, extending in the radial direction, and as shown in FIG. A protrusion protruding in the radial direction is formed so as to be located between 10a. Further, as shown in FIG. 6, the other end of this protrusion is formed with a fitting portion into which a connecting terminal is fitted. 16 is signal unit 1
A signal coil wound around the bobbin part 12a of No. 2,
The beginning of the winding is wound around one protrusion of the connector terminal 14 for the start of winding, and the end of the winding is wound around the other protrusion of the connector terminal 15 for the end of winding, and these are electrically connected. Reference numeral 17 denotes an ignition unit having a built-in semiconductor amplifier device (consisting of an integrated circuit or the like) having an ignition circuit function, which is disposed on the side of the stator 10 where the protrusion 10a is not formed, and is shown in FIG. A pair of mounting portions 17b having mounting holes 17a are formed as shown in FIG. 18 is each mounting part 17b
A pair of input terminals 19 are provided at the center of the main body of the ignition unit 17 and are formed to protrude in the radial direction. It is fitted and connected to the connector terminals 14 and 15. 20 is a metal cover for a heat sink partially buried under the ignition unit 17. In addition, the mounting hole 17a, the mounting part 1
7b, each terminal 18, 19, and the metal cover 20 are integrally formed when the ignition unit 17 is molded. Further, the mounting portion 17b of the ignition unit 17 is fitted into the support portion 12c of the signal unit 12 from the radial direction,
At this time, the output terminal 18 is housed and held in the housing part 12d, and the mounting holes 12b and 17a match,
Moreover, the input terminal 19 is fitted and connected to the fitting portions of the connector terminals 14 and 15. 21 is the ignition unit 17
and the signal unit 12 are integrated into the housing 1.
Each mounting hole 12b,
17a and is screwed into the screw hole 1c of the housing 1. At this time, the lower metal cover 20 of the ignition unit 17 is in contact with the opening seat 1a of the housing 1. A pair of lead wires 22 are connected to connector terminals 23 which are fitted and connected to each output terminal 18 of the ignition unit 17, and are connected to the ignition coil via a grommet 24 fixed to the housing 1 as shown in FIG. connected to. This connector terminal 23 is connected to each housing portion 12d of the signal unit 12.
It is inserted inside and stored and held. 25 is a cam type governor advance device mounted on the tip of the cylinder 4, 26 is its governor base, and 26a is a mounting piece formed at two symmetrical locations on this governor base 26, with screw holes 26b formed therein. has been done. 27 is a half-bowl-shaped power distribution rotor fixed to the governor base 26, and has an opening 27a formed therein.
The ignition unit 17 is formed to be large enough to be exposed. 28 is a pair of tightening screws that fix the power distribution rotor 27 by screwing into the screw hole 26b of the governor base 26; 29 is a pair of tightening screws for the power distribution rotor 27;
A rotor electrode is fixed to the upper part of the rotor electrode, one end of which can be in sliding contact with the center electrode 30, and the other end of which can face each of the peripheral electrodes 31 in turn. 32 is a power distributor cap that is fitted and fixed to the housing 1, and each central and peripheral electrode 30, 31
is fixed.

Next, to explain the operation of the embodiment in detail, first, when the rotating shaft 2 is rotated in the direction of the arrow by the engine,
Since the cylinder 4 is rotated via the governor advance device 25 and the signal rotor 5 is rotated, its four protrusions 5a approach, oppose, and separate from the three protrusions 10a of the stator 10, respectively. Then, the permanent magnet 11 is rotated by the rotation of the protrusion 5a of the signal rotor 5.
A change occurs in the interlinkage magnetic flux from the rotor, and an expansion voltage corresponding to the rotation axis is generated in the signal coil 16. This signal voltage is inputted from the connector terminals 14 and 15 to the input terminal 19 of the ignition unit 17, so that the semiconductor amplifier in the ignition unit 17 connects the lead wire 22 to the connector terminal 23,
one of the ignition coils energized through the output terminal 18;
The ignition voltage is induced on the secondary side by intermittent current on the secondary side. This ignition voltage is guided to the center electrode 30,
Power is sequentially distributed to each peripheral electrode 31 through the rotor electrode 29 of the rotating power distribution rotor 27 .

Now, the signal unit 12 and the ignition unit 17
In detail, the diameter and depth of the housing 1 are usually the same as the diameter and axial dimensions of each component installed within it, and when the power distributor body is installed on the engine, the diameter and depth of the housing 1 are It has been determined that it will not interfere with the included auxiliary equipment. Therefore, it is extremely important how to install the ignition unit 17, which has a large volume, into the current housing 1 without increasing the diameter and depth of the housing 1. Moreover, it is also difficult to install and remove the ignition unit 17. It must be made easy to do.

Therefore, in the embodiment of the present invention, there is a relatively large space between the signal generating section and the governor advance device 25.
Even if 0a is reduced from 4 to 3, the signal coil 16
The ignition unit 17 is removably installed in this space after confirming that it has almost no adverse effect on power generation.

That is, one protrusion on the side opposite to the link 9 with respect to the inner rotating shaft 2 of the four protrusions 10a of the stator 10 is removed, and a wide axially extending protrusion is provided at the bottom of the housing 1 corresponding to the position of this protrusion. An opening seat 1a having a large area is formed, and a pair of protrusions 1b extending in the axial direction are formed at two symmetrical locations.

Thus, the signal unit 12 is inserted through the opening of the housing 1, each of its supporting parts 12c is brought into contact with each of the opening seats 1a, and at the same time each positioning part 12e is engaged between the pair of protrusions 1b. Hold position. Then, the connector terminals 23 from the ignition coil are inserted into each housing portion 12d of the signal unit 12 and stored therein. Next, the ignition unit 17 is inserted radially through the opening of the housing 1, and at this time its mounting portion 17b is inserted into each support portion 1 of the signal unit 12.
2c, and the metal cover 20 of the ignition unit 17 is held in contact with the opening seat 1a of the housing 1.

Then, the support part 12c of the signal unit 12
and each mounting hole 1 of the mounting portion 17b of the ignition unit 17.
2b and 17a match, so if the tightening screw 21 is inserted through each of the mounting holes 12b and 17a and screwed into the threaded hole 1c of the housing 1, the signal unit 12 and the ignition unit 17 are connected to the housing 1. The assembly of the signal unit 12 and the ignition unit 17 is completed by fixing them integrally. At this time, the input terminal 19 of the ignition unit 17 is connected to the connector terminal 1.
It is fitted and connected to the fitting portions 4 and 15.

By the way, since the ignition unit 17 is overused, there is a possibility of it breaking down, and in this case, the ignition unit 1
Only 7 needs to be replaced with a new one.

A major feature is that the ignition unit 17 can be easily removed without removing the governor advance device 25 and the power distribution rotor 27.

That is, by artificially rotating the power distribution rotor 27,
The tightening screw 21 is exposed through the opening 27a, and is removed by loosening it with a screwdriver.Then, by manually pulling the ignition unit 17 in the direction of the arrow shown in FIG. The housing 1 is removed from the support part 12c.
It will be removed from. Therefore, the installation of a new ignition unit 17 is done in the reverse order of the removal process, that is, insert the ignition unit 17 in the opposite direction of the arrow, fit its mounting part 17b into the support part 12c of the signal unit 12, and then ignite it. The unit 17 and the signal unit 12 are connected to the housing 1 by tightening screws 21.
It can be fixed integrally with the

During the installation and removal of the ignition unit 17, even if the signal unit 12 is removed by loosening the fastening screw 21, the positioning portion 12e of the support portion 12c is engaged between the projections 1b of the housing 1 and does not move, so that the installation and removal of the ignition unit 17 can be performed smoothly.
The connector terminals 14, 15 must be provided in a position that does not interfere with the winding work and is advantageous in terms of space. If the connector terminals 14, 15 were to protrude in the axial direction, the axial length of the distributor would become long, and if they were to protrude radially at a position that would interfere with the stator 10, a large amount of space would be required in the radial direction.

In particular, in this invention, as described above, the coil connection portions of the connector terminals 14 and 15 that extend and protrude in the radial direction from the upper part of the bobbin portion 12a of the signal unit 12 are located on the same circumference where the protrusion 10a of the stator 10 is located. Since the coil connecting portions of the connector terminals 14 and 15 can be arranged using the space between the projections 10a, the radial dimension of the entire power distribution device can be reduced. Or, it becomes possible to efficiently incorporate the ignition unit and the connector part for the external lead wire in the available space.

However, in this case, the stator 10 is rotated by the vacuum advance device 8, so even if the stator 10 is rotated to the maximum advance position by the vacuum advance device 8, the connector terminals 14, 15
It is necessary to maintain a positional relationship such that the coil connecting portion and the protrusion 10a of the stator 10 do not come into contact with each other.

In general, the rotation angle of the stator 10 at maximum advance is about 20 degrees for a 4-cylinder engine and about 15 degrees for a 6-cylinder engine, and if the power distributor is used exclusively for 4 or 6 cylinders, this is due to the design. There is no particular problem, but
When the stator 10 is used for both 4 and 6 cylinders, the number of protrusions 10a on the stator 10 and the angle between the protrusions are different for 4 cylinders and for 6 cylinders, so it is necessary to give sufficient consideration to the above positional relationship. .

Fig. 7 shows the stator 10 for both 4 and 6 cylinders.
This figure shows an example of the positional relationship between the protrusions and the coil connection parts of the connector terminals 14 and 15, in which three protrusions 6b are arranged at 90-degree intervals on a 4-cylinder stator, and three protrusions 6b are arranged at 90-degree intervals on a 6-cylinder stator. 4 protrusions 6c
The figure shows the case where the connector terminals 14 and 15 are arranged at 60° intervals, and the coil connection parts of the connector terminals 14 and 15 are arranged at 60° intervals.
It is arranged at a position where the angular spacing with the protrusions 6c on both sides of the cylinder stator is 30 to 40 degrees. In this way, even if the stator for 4 cylinders or 6 cylinders rotates to the maximum advance position, the coil connecting portions of each connector terminal 14, 15 will not come into contact with the projections 6b or 6c, and the stator for 4 cylinders or 6 cylinders will easily , 6 cylinders can be shared.

Furthermore, Fig. 8 shows three protrusions 6b for a four-cylinder engine.
This shows an example where three protrusions 6c for a 6-cylinder cylinder are arranged at 60-degree intervals, and in this case, the angular interval α with the central protrusion is
Each terminal terminal 14, 1 so that the angle is 30 to 40 degrees
By arranging 5 coil connection parts, it is possible to share 4 and 6 cylinders.

As mentioned above, the engine ignition system according to this invention is
Of the protrusions on the stator that are arranged at a distance to face the protrusions of the signal rotor, the protrusions on the side opposite to where the link of the governor advance device is arranged are reduced,
By arranging the ignition unit on the side of the reduced protrusion so that it can be attached to and removed from the signal unit in the radial direction, the space inside the power distributor can be effectively utilized. protrudes in the radial direction of the stator, and is located on the same circumference as the protrusion of the stator and at a position that does not come into contact with the protrusion of the stator when the stator is rotated to the maximum advance position by the governor advance device. It is characterized by the fact that the signal coil connector terminal can be placed without any problem using the space between the protrusions of the stator, so it is possible to reduce the radial dimension of the entire power distribution device or to place the ignition in a free space. In addition to being able to efficiently incorporate the connectors for the unit and external lead wires, the 4-cylinder,
It has the advantage that it can be easily adapted to six cylinders.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a main part showing an embodiment of this invention, Fig. 2 is a plan view showing how the signal unit and ignition unit are installed, Fig. 3 is a plan view showing how the distribution rotor is installed, and Fig. 4 is a plan view showing how the distribution rotor is installed. The figure is a plan view showing the inside of the housing, Figure 5 is a perspective view of the signal unit and ignition unit, Figure 6 is a plan view of the main part of the signal unit, and Figures 7 and 8 are for 4 and 6 cylinders. FIG. 6 is a schematic diagram showing a different example of the arrangement relationship between the connector terminal of the signal unit and the protrusion of the stator in FIG. In the figure, 1 is a housing, 2 is a rotating shaft, 3 is a bearing, 4 is a cylinder, 5 is a signal rotor, 5a is a protrusion, 6 is a movable plate, 7 is a pin, 8 is a vacuum advance device, and 9 is a Link, 10 is stator, 10
a, 10b, 10c are protrusions, 11 is a permanent magnet, 1
2 is a signal unit, 20 is a metal cover, 14,1
5 and 23 are connector terminals, 16 is a signal coil, 1
7 is an ignition unit, 18 is an output terminal, 19 is an input terminal, 31 is a tightening screw, 25 is a governor advance device,
26 is a governor base, 27 is a power distribution rotor, and 32 is a cap. Note that the same reference numerals in each figure indicate the same parts.

Claims (1)

[Scope of utility model registration request] A housing that supports a rotating shaft that rotates according to the engine speed, a signal rotor that is attached to the rotating shaft and has a plurality of protrusions formed at equal intervals on a concentric circle, and is rotated by a vacuum advance device. and a stator formed concentrically at intervals such that a plurality of protrusions face the protrusions of the signal rotor except on the side opposite to the side where the link of the vacuum advance device is arranged with respect to the rotation axis, and the rotation of the stator. A signal coil that is arranged in the housing concentrically with the shaft and generates an ignition signal by rotation of the signal rotor; one end is connected to the winding start and winding end of this signal coil, and a fitting part is formed at the other end. a signal unit having a pair of connector terminals, which is housed in the housing on the side where the protrusions of the stator are not formed, and which is radially attachable and detachable to the fitting portion of each connector terminal in the signal unit; and includes an ignition unit that performs an ignition function by receiving an ignition signal through the connector terminal, and the coil connecting portion of each connector terminal in the signal unit protrudes in the radial direction of the signal unit and has the same circular shape as the protrusion of the stator. An engine ignition device characterized in that each of the engine ignition devices is disposed on a circumference at a position where the stator does not come into contact with a protrusion of the stator when the stator is rotated to a maximum advance position by the vacuum advance device.