JPH0632253B2 - Assembled spark plug - Google Patents

Description

Detailed Description of the Invention [Industrial applications]

 The present invention relates to a novel prefabricated spark plug.

[Prior art]

Generally, a spark plug is composed of a center electrode and a ground electrode for discharging, an insulator for high voltage, a plug body for assembling these, a packing part, and a gasket. Further, in the conventional spark plug, all of the above-mentioned components are integrally connected.

[Problems to be Solved by the Invention]

As described above, since the conventional spark plug has an integral structure, if the electrode or the insulator is contaminated with oil, the user cannot easily remove it, and the packing parts and other parts are not damaged. In some cases, there is a problem in that only that part cannot be replaced and the discharge effect is low. The present invention allows the user to disassemble and assemble the parts, so that the self repair spirit (DO I
It is an object of the present invention to provide an assembly-type spark plug which can satisfy the desire of T YOURSELF) and can be easily cleaned, replaced, and maintained and repaired.

[Means for Solving the Problems]

To achieve the above object, the assembly-type plug according to the present invention comprises an insulator, a nut, a bolt, a conductive gasket, a coil spring, a live ring, and a dust thimble, and the insulator has a rod-shaped conductor at its center, A conductor is projected from one end of the insulator to form a center electrode, and a conductor is projected from the other end of the insulator to form a terminal, and a center ring is formed in the middle of the insulator, and a center ring is formed above the center ring. Each having a step ring, the nut has a different diameter hole penetrating in the axial direction, the insulator is inserted into the hole, and is locked at the center ring,
And, the male screw portion is provided on the outer periphery of the upper half portion, and the bolt head is provided on the outer periphery of the lower half portion, and the bolt has a different diameter hole penetrating in the axial direction, and the hole of the insulator is formed in the hole. The center ring, the step ring, and the center electrode are penetrated and locked in the center ring, and the lower head has a bolt head, and the lower half portion of the different diameter hole is screwed with the male screw of the nut. And a male screw portion for screwing to the cylinder on the outer periphery of the upper half, and the bolt is made of metal, and the upper end portion of the bolt is connected to the nut. The active electrode ring is integrally provided with a ground electrode adjacent to the center electrode projecting from the upper end portion, and the active ring is fitted to the upper end portion of the insulator so that the upper end portion and the inner peripheral surface of the upper end portion of the different diameter hole of the bolt. Is held slidably between, the coil spring is provided between the step ring of the live ring and the insulator, for constantly biasing the live ring in the ignition direction, the conductive gasket, The dust simple is fitted to the bolt, and is used to join the grounding electric wire to the bolt. The dust simple is fitted to the bolt head of the joined nut and bolt, and fitted with a spanner to rotate. It is characterized by being able to do.

[Action]

The nuts and bolts house the insulation and are separably coupled. The bolt integrally has a ground electrode. The bolt also
The lively ring is slidably held, and a coil spring for urging the lively ring is housed and held between the coil spring and the insulator. The vibrant ring slides in accordance with the engine's air supply, compression, explosion, and exhaust strokes, promotes the effect of spraying the ignition electrode, and oil stains,
Prevents soot from adhering. The tast thimble fits over the nuts and bolts, and a spanner enables this assembled spark plug to be attached to and detached from the cylinder in the same manner as a conventional spark plug.

【Example】

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of an assembled spark plug according to an embodiment of the present invention. The assembly type plug (hereinafter, referred to as ignition plug) includes an insulator 1 made of porcelain, a nut 2, a bolt 3, a washer 4, an electrically conductive gasket (hereinafter, referred to as a gasket) 5, a dust thimble 6, a coil spring 7, and a live ring 8. It is configured by assembling each member of. The insulator 1 has a rod-shaped conductor at the center, the upper end of the conductor is projected to the outside to form a center electrode 11, and the lower end of the conductor is projected to the outside to apply a high voltage power source 12
Is formed. Further, the center ring 13 is formed in the middle of the insulator 1, and the step ring 14 is provided on the center ring 13. The nut 2 has a male screw portion 21 on the outer peripheral surface of the upper half and a hexagonal bolt head 22 on the outer periphery of the lower half. Also,
The nut 21 has a hole 23 of different diameter penetrating in the axial direction. A lower part of the insulator 1 below the center ring 13 can be inserted into the hole of the lower half part, and the center ring 13 is inserted into the hole of the upper half part.
Can be fitted and stopped. The bolt 3 is made of metal, has a different-diameter hole 31 with a large lower half part and a small upper half part inside, and has a female screw part inside the lower half part of the different-diameter hole 31. The nut 2 and the bolt 3 can be joined by screwing the male screw portion 21 of the nut 2 into which the insulator 1 has been inserted and stopped. The bolt 3 also has an arc-shaped ground electrode 32 facing the hollow portion at the upper end, a male screw portion 33 is formed on the outer peripheral surface of the upper half portion, and a hexagonal bolt head is formed on the lower outer periphery. 34 is formed. The male screw portion 33 is for attaching the spark plug to the cinder. The washer 4, coil spring 7 and vital ring 8 are bolts 3
Is attached between the insulator 1 and the bolt 3 before joining the nut to the nut 2 as follows. That is, the washer 4 is mounted on the upper surface of the center ring 13 of the insulator 1, and the coil spring 7 is fitted on the upper end portion having the center electrode 11 of the insulator 1 so that the bottom portion of the coil spring is on the upper surface of the step ring 14. Then, the vibrating ring 8 is inserted into the different diameter hole 31 of the bolt 3, and the bolt 3 is covered from above the insulator 1 fitted in the nut 2 to the center electrode 1 of the insulator.
1 is passed through the hole in the center of the vital ring 8, and the male screw portion 21 of the nut 2 is screwed into the female screw portion of the bolt 3 so
And nut 2 are connected, and at the same time, the center electrode 11 is attached to the bolt 3
It is made to project from the hollow portion of the above to be close to the ground electrode 32. Thus, when the bolt 3 is coupled to the nut 2, the washer 4 is sandwiched between the step surface of the different diameter hole of the bolt 3 and the upper surface of the center ring 13 of the insulator 1 to prevent leakage. . The lower end of the coil spring 7 abuts on the step ring 14 of the insulator 1, and the upper end abuts on the lower end of the active ring to urge the active ring upward. And lively ring 8
Can slide up and down inside the bolt 3. The gasket 5 is fitted around the lower end of the male screw portion 33 of the bolt 3, and has a tongue piece 51 extending laterally. This tongue is used to connect the ground wire. The dust simple 6 is formed in an annular shape, and has 18 equal-length bending angles 61 in the lower half portion and 6 bending angles 62 in the lower half portion, and extends downward from the nut 2. The lower end of the insulator 1 is penetrated, and the lower half is fitted to the bolt head 34 of the bolt 3 and the lower half is fitted to the bolt head 22 of the nut 2 to cover them. Therefore, the spark plug can be rotated through the dust thimble 6 using the hexagon spanner. The dust thimble also prevents dust from entering between the nut 2 and the bolt 3. Next, the advantages of the above configuration will be described. (A) As described above, in the spark plug according to the present invention, the washer 4, the coil spring 7, and the ring 8 are attached to the insulator 1, which is inserted between the nut 2 and the bolt, and the nut and the bolt are screwed together. Combined, gasket 5 and dust thimble 6
Since it is a built-in type that can be assembled or disassembled quickly, the user can meet the desire to exercise self-repairing spirit, and if it is dirty or damaged, disassemble and wash it yourself. Alternatively, parts can be replaced. (B) When a spark plug is used, the high temperature inside the bolt 3 is conducted to the nut 2 and the dust thimble 6 and is radiated to the outside air from the bolt 3, the nut 2 and the dust thimble 6, so that the heat radiation effect is improved. To do. Nut 2, bolt 3,
If the dust thimble 6 is made of a material having a high discharge efficiency, such as copper or aluminum, and the dust thimble has a polygonal shape to increase the heat radiation area, the heat radiation effect is further enhanced. (C) Further, since the ground electrode 32 of the bolt 3 is integrally formed and is separated from the center electrode 11,
Bolts having different types of ground electrodes can be selected and used according to the temperature characteristics of each region of the bolt. FIG. 4 is for a boreal region. FIG. 4A shows an example in which an electrode 31B having a groove 31A having a single letter is provided on the top of the bolt 3, and FIG. 4B shows cross-shaped grooves 31B and 31B. This is an example in which an electrode 32B on which is formed is provided. The electrode having such a shape has a good ability to concentrate heat, and is useful for improving engine ignition efficiency. Fifth is three kinds of electrodes 32C, 32D, 32 for subtropical regions
The example of E is shown in FIG.
2A corresponds to the case where one piece thereof is removed, (B) corresponds to the case where two pieces are removed from the electrode 32B of FIG. 4, and (C) corresponds to the case where three pieces are removed. The type of electrode shown in FIG. 5 is suitable for the subtropical regions because it has a moderate heat collecting effect. Furthermore, FIG. 6 shows an electrode suitable for the subtropical region,
32F in (a) is a pair cut into one-eighth circular arc surfaces, and 32G in (b) is a cut into a single eighth arc surface. This form of electrode has the lowest heat collection effect and is suitable for tropical regions where the temperature is relatively high. Since each of the electrodes 32A to 32G is integrally formed with the bolt by cutting the top of the bolt 3,
Very high productivity. Since the electrodes of the conventional spark plug are formed by turning a single curved electrode and connected by soldering, the present invention greatly improves the productivity. (D) The provision of the coil spring 2 and the vital ring 8 in the bolt 3 is a novel structure according to the present invention, and in the case of a four-stroke operation process of intake, compression, explosion and exhaust in the cylinder,
At the same time, the vibrating ring reciprocates in the bolt 3, whereby the effect of continuously disturbing the air flow inside the bolt 3 promotes the gas injection effect in the ignition area.
The oil dirt inside the bolt 3 can be effectively and thoroughly removed, the accumulation of carbon (soot) can be reduced, the efficiency of ignition can be improved, and the fuel of gasoline can be completed. (E) Since the gasket 5 is additionally installed and the grounding conductor is connected to the gasket 5, the safety of voltage is secured and a good discharge effect is achieved. (F) Since the simple dust is attached, the heat radiation effect is obtained, and the bolt heads of the nut 2 and the bolt 3 are covered to prevent dust from entering the electrodes of the cylinder and the spark plug. Further, the dust thimble assembly type ignition plug can be easily attached to and detached from the cylinder by using the spanner for attaching and detaching the current ignition plug, so that the user can use the assembly type ignition plug without any inconvenience. be able to.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of the assembled spark plug of the present invention, and FIG.
FIG. 4 is a partially sectional side view of the assembled state, FIG. 3 is a partially cutaway perspective view, and FIGS. 4 to 6 are perspective views showing various types of bolts having various ground electrodes. Shows a bolt having a ground electrode for the boreal region, FIG. 5 shows a bolt having a ground electrode for the subtropical region, and FIG. 6 shows a bolt having a ground electrode for the subtropical region. 1 ... Insulator, 11 ... Center electrode, 12 ... Terminal, 13 ... Center ring, 14 ... Step ring, 2 ... Nut, 21 ... Male thread part, 22 ... Bolt head, 3 ... Bolt , 31 ... Different diameter holes, 32, 32A to 32E ... Ground electrode, 33 ... Male screw part, 34 ... Bolt head, 4 ... Washer, 5 ... Conductive gasket, 6 ... Dust thimble.

Claims (1)

[Claims] (A) An insulator, a nut, a bolt, a conductive gasket, a coil spring, a vibrating ring, and a dust thimble. (B) The insulator has a rod-shaped conductor at its center, and the conductor is an insulator. A center electrode protruding from one end of the insulator, and a terminal protruding from the other end of the insulator, and
A center ring is provided at an intermediate portion of the insulator, and a step ring is provided above the center ring. (C) The nut has a different diameter hole penetrating in the axial direction. The insulator is inserted into the inner ring and locked at the center ring, and the male screw portion is provided on the outer periphery of the upper half portion and the bolt head is provided on the outer periphery of the lower half portion, respectively. Has a different diameter hole penetrating in the direction, penetrates through the center ring, the step ring and the center electrode of the insulator in the different diameter hole and is locked at the center ring, and the bolt head is provided on the lower outer periphery. To
The lower half part of the different diameter hole has a female screw part to be screwed with the male screw of the nut, and further has a male screw part for screwing to the cylinder on the outer periphery of the upper half part, and the bolt is made of metal. The upper end portion integrally has a ground electrode that is adjacent to the center electrode and protrudes from the upper end portion of the bolt when the bolt is coupled to the nut. The coil spring is fitted to the upper end of the body and slidably held between the upper end and the inner peripheral surface of the upper end of the different diameter hole of the bolt. Is provided between the step rings of (1) to constantly urge the active ring in the ignition point direction, and (g) the conductive gasket is fitted to the bolt.
(D) The dust simple can be fitted to the bolt heads of the nut and the bolt, and can be rotated by fitting a spanner. Assembled spark plug characterized by: