JPS5922293Y2 - Power distribution rotor for engine ignition - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a power distribution rotor for an engine ignition power distributor.

As is well known, this type of power distribution rotor is rotatably supported by a power distribution device housing, and is removably fitted into a cam cylinder of a rotating shaft driven by an internal combustion engine, and is used to control the ignition voltage generated in the ignition coil. is introduced into the rotor electrode of the power distribution rotor through the center electrode of the power distributor cap, and as the rotor electrode rotates, it is sequentially distributed to each spark plug of the engine through the peripheral electrode of the power distributor cap that faces this rotor electrode. It is.

During this distribution, a high voltage of typically 20 to 3 Q KV is applied between the rotor electrode and the cam cylinder.

However, this power distribution rotor is molded from an insulating material having a dielectric strength sufficient to withstand the above-mentioned high voltage.

However, since the rotor's wall thickness needs to be large enough to withstand the high voltage, an insulating material is used between the rotor electrode and the cam cylinder to improve insulation without increasing the wall thickness. There is one in which the cam is interposed between the rotor electrode and the cam cylinder.

When molding a power distribution rotor in which an insulating member is embedded between the rotor electrode and the cam end, it is possible to easily prevent forgetting to insert the insulating member and preventing deformation or damage of the insulating member due to changes in molding conditions. First, it had the disadvantage that performance could not be stabilized.

This idea was devised to eliminate these drawbacks.
An embodiment of this invention will be described below with reference to the drawings.

That is, in the figure, 1 is a rotating shaft driven by an internal combustion engine (not shown), 2 is a cam provided on a part of this rotating shaft 1, 3 is a cam cylinder formed at the tip of the rotating shaft 1, Reference numeral 4 denotes a rotor main body made of thermoplastic resin or thermosetting resin, which is detachably fitted to the outer circumference of the cam cylinder 3.

5 is a rotor electrode embedded in the rotor main body 4; 6 is an insulating member made of, for example, thermoplastic resin, embedded between the rotor electrode 5 and the end face of the cam cylinder 3; The color is different from that of thermosetting resin.

In this way, by embedding an insulating member made of a thermoplastic resin different from that of the rotor main body 4 between the rotor electrode 5 of the power distribution rotor and the end surface of the cam cylinder 3, the insulation material after being molded as a power distribution rotor is It can be easily determined from the appearance whether the component is buried securely.

In addition, when molding the power distribution rotor, if the molding conditions such as molding pressure and molding temperature are abnormal, the insulating member may be deformed or damaged, resulting in a decrease in the insulation between the rotor electrode 5 and the cam cylinder 3. do.

Therefore, conventionally, when setting such molding conditions, the distribution rotor is cut to observe the insulating material and the molded state between the rotor electrode and the insulating member, but the insulating material and the insulating member are of the same color, It is not possible to observe the mold condition at a glance, which requires a great deal of effort.

Therefore, according to this invention, an insulating member having a color different from that of the insulating material forming the rotor main body 4 is integrally molded, so that the molded state can be observed at a glance when the power distribution rotor is cut. This makes it easier to set molding conditions and increases the reliability of insulation.

As described above, this invention embeds an insulating material of a different color from the insulating material color that forms the main body of the rotor between the rotor electrodes and the cylindrical part, so it is possible to prevent forgetting to insert the insulating material, and it is possible to adjust the molding conditions. Setting is also simple and reliable, and effects such as increased reliability of insulation between the rotor electrode and the cam cylinder section can be achieved.

[Brief explanation of the drawing]

The figure is a sectional view of an engine ignition power distribution rotor showing an embodiment of this invention. In the figure, 1 is a rotating shaft of a power distributor, 3 is a cam cylinder, 4 is a rotor main body, 5 is a rotor electrode, and 6 is an insulating member.

Claims (1)

[Scope of utility model registration request] The rotor main body is made of an insulating material and has a cylindrical part formed at one end of a rotating main body driven by an engine, and a rotor main body that is removably fitted to the outer periphery of the cylindrical part and has rotor electrodes. 1. A power distribution rotor for engine ignition, characterized in that the rotor is integrally molded with a rotor, and an insulating member having a color different from the insulating material color is interposed between the rotor electrode and the cylindrical portion.