JPS5918156Y2 - Engine ignition signal generator - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an engine ignition signal generator suitable for converting, for example, a contact type power distribution device equipped with a circuit breaker into a non-contact type power distribution device.

Conventionally, when manufacturing non-contact ignition devices for internal combustion engines, it has been common to design them exclusively for non-contact use.

On the other hand, in order to convert an existing power distribution device used as a contact-type ignition device into a contactless one, it is necessary to replace the power distribution device itself with a dedicated one, and in such a case, a non-contact ignition device is extremely expensive. It had become a thing.

Under these circumstances, it has been considered to replace the general contact type assembly with a non-contact type assembly to make it contactless.

FIG. 1 shows a contact-type power distributor that has been used in the past. Reference numeral 1 denotes a power distributor housing, and a shaft 2 that is rotatably driven by an engine is supported in the center of the housing.

A camshaft 3 is integrated with or attached to the shaft 2, and a power distribution rotor 4 is fitted and fixed to the upper end of the camshaft.

5 is a fixed base attached to the housing 1; 7 is a movable base rotatably attached to the fixed base 5; 9
is an arm support assembly facing the camshaft 3, which is attached to the movable base 7, and when this contact is turned on or
Turning off generates high voltage in the ignition coil.

FIG. 2 is an example of converting the above-mentioned contact type power distribution device to a non-contact type.

In the figure, reference numeral 10 indicates a stator corresponding to the arm support assembly 9 in FIG. 1, and stator 11. It is attached to the movable base 7 via a magnet 12.

A signal coil 13 is inserted inside this stator 11.

The stator 11 has a protrusion 11a, faces a rotating inductor 14, which will be described below, and causes a change in magnetic flux due to a change in a gap 15 between the protrusions 11a, thereby causing an electromotive force to be generated in the signal coil 13.

This becomes the signal for engine ignition.

The rotating inductor 14 is fixed to the camshaft 3 by being integrated with the power distribution rotor 4 or meshing with the camshaft 3.

Here, the gap 15 with the stator 10 is the signal coil 13.
There is an important relationship with the electromotive force generated between the two, and if this gap becomes small and contact occurs, normal performance cannot be maintained.

For this reason, when fixing the stator 11, positioning to maintain the clearance has been performed using a dummy ring for defining a clearance or using a gauge or the like with the camshaft 3 as a reference.

However, these are simply parts for regulating the clearance, and are used by the user, and the setting value of the clearance varies from person to person, and in order to obtain the performance claimed by the manufacturer. It required considerable precision.

Therefore, it is conceivable that the rotary inductor 14 and the protrusion 11a of the stator 11 may come into contact with each other due to engine vibration, which may cause engine trouble.

On the other hand, performance may be reduced due to the gap being too large and the specified electromotive force not being generated.

This idea was made in order to eliminate the above-mentioned drawbacks, and by forming the clearance regulating part integrally with the rotating inductor, it is possible to automatically set the regular clearance when assembled into an assembly. It has excellent characteristics.

An embodiment of this invention will be described below.

3 to 5, 14 is a rotating inductor, which has a pole piece 14a and a gap 15 below the pole piece 14a from the circumference of the pole piece 14a.
A ring-shaped protrusion 14b having a correspondingly larger diameter is integrally constructed.

FIG. 3 shows the rotary inductor 14 assembled into a power distribution assembly.

10 is a stator, 11a is a projection of the stator, and 15 is a gap between the stator 10 and the rotating inductor 14.

When converting a contact type power distribution device to a contactless one, first, the conventional arm support assembly 9 is removed.

Then, the stator 10 is temporarily fixed to the movable plate 7.

Next, the rotary inductor 14 according to the present invention is inserted into the camshaft 3 from above.
Attach to.

At this time, the lower ring-shaped protrusion 14b causes the camshaft 3 to
The stator 10 moves so as to have a regular clearance between the two.

Then, when the rotary inductor 14 is further inserted until it is fixed, the protrusion 11 a of the stator 10 and the protrusion 14 a of the rotary inductor 14 face each other with a regular gap 15 between them.

The ring-shaped protrusion 14b fits below the opposing part of the protrusion and does not come into contact with the stator 10 even in a rotating state.

The stator 10 positioned as described above is then completely fixed with screws or the like.

In this way, in the process of assembling the stator 10 and rotating inductor 14, which are functional parts, in a normal state, the gap between them is reduced by 1.
It is set dynamically and can function normally to generate the correct coil voltage no matter who operates it.

Note that in the above embodiment, the rotating inductor is configured separately from the power distribution rotor, but the rotary inductor and the power distribution rotor may be integrally formed.

Moreover, although the structure in which the magnets are fixed to the stator has been described, the pole pieces of the rotating inductor may be integrally formed with magnets.

Furthermore, it is possible to position not only the magnetic power generation type but also the rechargeable type and the oscillation type.

As described above, according to this invention, since the protrusion for determining the clearance is integrally formed on the rotating inductor, there is no need for special parts for determining the clearance period, and the trouble of setting the clearance is also eliminated, allowing anyone to achieve accurate This has the effect of configuring a good non-contact ignition device.

[Brief explanation of drawings]

Figure 1 is a sectional view of a conventionally used contact type power distributor, Figure 2 is a sectional view of a non-contact type power distributor, Figure 3 is an enlarged sectional view of essential parts showing an embodiment of this invention, FIG. 4 is a sectional view of the rotating inductor used in this invention, and FIG. 5 is a plan view thereof. In the figure, 1 is the power distributor body, 2 is the shaft, 3 is the camshaft, and 4
is a power distribution rotor, 5 is a fixed base, 7 is a movable base, 10
11 is a stator, 12 is a magnet, 13 is a coil, 14 is a rotating inductor, 14a is a pole piece, 14b is a ring-shaped projection, and 15 is a gap. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] A camshaft driven by an engine ignition power distributor shaft, a stator having a signal coil disposed around the camshaft, and a stator fitted to the camshaft and acting on the stator to generate the signal coil. a rotating inductor that generates an ignition signal,
A ring-shaped protrusion is provided integrally at the lower part of the rotating inductor, and the outer diameter of the ring-shaped protrusion is larger than the outer diameter of the rotating inductor in advance between the rotating inductor and the protrusion of the stator. It is characterized by being larger than the set regular clearance, that is, the mechanical radial play of the power distributor, and set large enough to generate a magnetic change that can supply the necessary and sufficient signal to the signal coil. Engine ignition signal generator.