JPS61265358A - Protective cover of distributor for internal-combustion engine - Google Patents

Abstract

PURPOSE:To make the setting of a protective cover easily performable, by forming this protective cover, having a hook part engaging a high tension tower of a distributor cap, with a material inherent in isolability and elasticity. CONSTITUTION:A distributor is distributed with high voltage through a distributor cap 4 and high tension cords 5 and 6, and in order to prevent the high voltage form leaking as water or brine sticks to an outer surface of the distributor cap 4, rubber boots 52 and 62 have so far installed there but with only these boots, it is hard or impossible to prevent the leak, so that a protective cover 7 inheret in isolability and elasticity is installed so as to cover each tip part of the distributor cap 4 and these high tension cords 5 and 6. In this protective cover 7, there is provided with a hook part 71 having a tip part 72 engaging high tension towers 44 of the distributor cap 4 not covered with these rubber boots 52 and 62, so that only this tip part is inserted between these high tension towers 44 whereby it is held by the distributor cap 4.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a protective cover for a power distribution device for an internal combustion engine.

[Background of the invention]

As described in Japanese Utility Model Application Publication No. 54-111521, conventional protective covers were used to protect power distribution caps that have high-voltage towers projecting in the same direction. The problem was that it became complicated. Therefore, a stopper 7 as shown in Fig. 1g7 is used.
6 is available, but it is expensive and requires the flange 75 to be placed under the high pressure tower 44! IX6
The disadvantage was that it was difficult to install the protective cover.

[Purpose of the invention]

An object of the present invention is to provide a protective cover for an internal combustion engine power distribution device that is inexpensive and easy to install.

[Summary of the invention]

In the present invention, a hook part that engages with the high voltage tower part of the power distribution cap is provided in a part of the protective cover, so that the protective cover can be securely held on the power distribution cap without attaching attachments such as fasteners.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

A shaft 2 driven by an engine and locking a rotor head 3 having a rotor electrode 31 at the tip;
tIi, supported by the housing 1.

A power distribution cap 4 in which a center electrode 41 and side electrodes 42 are integrally molded from synthetic resin is fixed to the housing 1 . The center electrode 41 and the rotor electrode 31 are electrically connected by a slider 43.

A high voltage cord 5 from a coil (not shown) is connected to the power distribution cap 4.
has a metal fitting 51 at its tip and is electrically connected to the center electrode 41. Furthermore, a high voltage cord 6 wired to each cylinder plug of the engine (not shown) has a metal fitting 61 at its tip and is electrically connected to a side electrode 42 facing the rotor electrode 31.

The ends of the high voltage cords 5 and 6 are respectively provided with rubber boots 52 and 62 that fit with the outer periphery of the high voltage tower 44 of the power distribution cap 4.

In the above configuration, a high voltage of more than ten kV is generated in the coil according to a signal detected by a signal detection section (not shown) in the power distribution device, and the high voltage cord 5 is connected to the center electrode 4 of the power distribution cap 4.
11C of power is transmitted and distributed to the side electrode 42 and high voltage cord 6 via the slider 43 and rotor electrode 31, and finally generates a spark in each cylinder plug. In this way, since high voltage is distributed between the power distribution cap 4 and the high voltage cords 5 and 6, water and salt water splashed in the engine room are prevented from adhering to the outer surface of the power distribution cap and leaking high voltage. ,
Said rubber boots 52, 62 are provided. but,
In cases where salt water is severely splashed, it is difficult to prevent fl leakage with the rubber boots 52 and 62 alone, so a protective cover 7 made of an insulating material is provided to cover the power distribution cap 4 and the tip of the high voltage cord 5゜6. . This protective cover 4
As shown in FIG. 2, a rubber boot 52.
62 is provided with a hook 71 having a tip 72 that engages the high voltage tower 44 of the power distribution cap 4 which is not covered.

As shown in Figure Cg4, the shape of the hook 71 is the size of each gap W of the high pressure tower 44, and the size W2 of the tip 72.
%If the size of the intermediate part 73 is W3, then W, >W, >
The protective cover 7 can be held on the power distribution cap 4 by inserting the hook 71 between the high voltage towers 44 by making the protective cover 7 an elastic material.

In addition, FIG. 5 shows that when the gap between the high voltage towers 44 is large, the same effect can be obtained by providing a VC notch 74 at the tip end of the hook 71.

FIG. 6 shows an example in which the tip portion 72 is spherical in shape. With this shape, when attaching the protective cover 7 to the power distribution cap 4, even if the gap between the hook tip 72 and the high voltage tower 44 is slightly misaligned, the tip 72 will be smoothly guided into the gap in the high voltage tower 44. This has the effect of making it easier to install.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a power distributor to which the present invention is applied, FIG. 2 is a perspective view showing an embodiment of the present invention, FIG. 3 is a perspective view of a power distribution cap to which a protective cover of the present invention is attached, and FIG. The figure is a sectional view of the main part of the present invention, is, 6〉, the figure is a detailed view of the hook part of the present invention, and FIG. 7 is a perspective view of a protective cover to which the prior art is applied. DESCRIPTION OF SYMBOLS 1... Housing, 2... Shaft, 3... Rotor head, 31... Rotor electrode, 4... Power distribution cap, 41... Center electrode, 42... Side electrode, 43...
- Slider, 44... High voltage tower, 5... High voltage cable, 51... Metal fitting, 52... Rubber boots, 6...
High voltage cable, 61... Metal fitting, 62... Rubber boots, 7... Protective cover, 71... Hook, 72...
Tip part, 73...Central part, 74...Kai porridge 1 ward porridge 2 figure mouthpiece 3 figure chimuzu

Claims (1)

[Claims] 1. The center electrode and side electrodes are integrally molded from an insulating material,
A protective cover for a power distribution cap having a high-voltage tower portion that engages with a rubber cap of a high-voltage cord connected to these electrodes is made of an insulating and elastic material having a hook portion that engages with the high-voltage tower portion of the power distribution cap. A protective cover for a power distribution device for internal combustion engines.