CN105406360A - High-voltage cap for spark plug - Google Patents

Abstract

The invention has a cap unit and a clamping unit, the cap unit has a perforation, a taper pipe portion and a card department, the perforation communicates the cap unit, the taper pipe portion takes shape in the cap unit and its pipe diameter is towards the perforation direction and is reduced gradually, the card department extends outwardly and takes shape in the bottom end of the cap unit and has a card slot, the card slot takes shape in the card department, the clamping unit has a locating tube and an extension pipe, the locating tube has a clamp ring groove, the clamp ring groove takes shape in one end of the locating tube and its internal radial internal reducing gradually, the locating tube penetrates the cap unit and is coated, the clamp ring groove is pressed the taper pipe portion, when the spark plug penetrates from the card department, make the spark plug receive the press-fit of the taper pipe portion, and then clamp the spark plug with the aid of the pressing force of the locating tube, in order to avoid the looseness of the spark plug caused by shaking or shaking.

Description

High pressure caps for spark plugs

technical field

The invention relates to a high-pressure cap, which refers to a high-pressure cap mechanism for combining spark plugs.

Background technique

The spark plug is a part used in automobile and motorcycle engines. The spark plug is installed in the combustion chamber of an internal combustion engine as an ignition element. It generates electric sparks by means of electricity to ignite the mixture of gasoline and air in the internal combustion engine to generate power. To drive the engine, the main structure of the existing spark plug is a central electrode, an insulating ceramic, a steel body and a grounding electrode, wherein the central electrode is made of a metal alloy and has high temperature resistance, and the insulating ceramic surrounds the central Electrode, when the central electrode is energized, it can avoid leakage. The steel body is covered with insulating ceramics and its upper part forms a hexagonal shape. The lower part is provided with a thread. A tiny gap that, when energized, creates an arc that ignites.

The steel part of the spark plug can be fixed on the engine of a car or motorcycle, and its insulating ceramics are covered by a high-voltage cap. The existing high-voltage cap has an electrical connection part inside, so as to electrically connect the central electrode of the existing spark plug; However, after the existing high pressure cap is combined with the spark plug, since the high pressure cap is made of a soft rubber material, the pressing force of the existing high pressure cap for the spark plug is not enough, and the spark plug is easy to be released from the vehicle due to vibration during the driving process of the vehicle. , Loose motorcycle engine, and then cause the engine flameout or poor contact of the spark plug, etc., there is indeed room for improvement.

Contents of the invention

In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention improves the existing high-voltage cap so that when it is combined with the spark plug, it can strengthen the pressing force on the spark plug, so as to avoid the shortcoming that the spark plug is easy to loose due to vibration.

In order to achieve the above-mentioned purpose of the invention, the technical means adopted in the present invention is to provide a high-pressure cap for spark plugs, which includes:

A cap unit, the cap unit is a hollow tube body and has a perforation, a tapered tube part and a locking part, the perforation is formed on the top of the cap unit and communicates with the hollow part of the cap unit, the tapered tube part The extension is formed in the cap unit and the pipe diameter of the tapered pipe part is tapered toward the perforation direction. The clamping part is extended and formed at the bottom end of the cap unit. The clamping part communicates with the tapered tube part and is provided with a clamp a slot, the locking slot is concavely formed on the inner ring surface of the locking part; and

A clamping unit, which is connected to the cap unit and has a positioning tube and an extension tube, the positioning tube is formed on one side of the clamping unit and is provided with a clamping ring groove, and the clamping ring groove is formed on one end of the positioning tube And the inner diameter of the clamping ring groove is tapered inward, the positioning tube is passed through the perforation and is surrounded by the cap unit, the clamping ring groove of the positioning tube accommodates and presses the tapered tube part of the cap unit, and the extension tube extends It is formed at the other end of the positioning tube which is different from the clamping ring groove.

The present invention is used to combine spark plugs. When the spark plugs are inserted from the clamping part of the cap unit, the ceramic insulating part of the spark plugs is press-fitted by the tapered tube part, and then the spark plugs are further clamped by the pressing force of the positioning tubes to avoid shaking or The vibration caused the loosening of the spark plug.

Description of drawings

Fig. 1 is a perspective view of the appearance of the present invention.

Fig. 2 is an exploded view of a three-dimensional component of the present invention.

Fig. 3 is a side sectional view of the clamping unit of the present invention.

Fig. 4 is a partially cutaway side view of the clamping unit of the present invention combined with a spark plug.

Fig. 5 is a diagram showing the urgent positioning relationship between the present invention and the spark plug.

Fig. 6 is an enlarged view of the positioning relationship between the tapered tube part and the ceramic insulating part of the spark plug according to the present invention.

detailed description

The technical means adopted by the present invention to realize the intended invention purpose are further described below in conjunction with the accompanying drawings and preferred embodiments of the present invention.

Please refer to FIG. 1 , the high-voltage cap for a spark plug of the present invention includes a cap unit 10 and a clamping unit 20 .

Please refer to Fig. 2 to Fig. 4, the aforementioned cap unit 10 is a hollow tube body and has a perforation 11, a tapered tube portion 12, a clamping groove 13, an engaging portion 14 and a dust-proof sheet 15, The perforation 11 is formed on the top of the cap unit 10 and communicates with the inner hollow of the cap unit 10. The diameter of the perforation 11 gradually increases downward from the top of the cap unit 10 to form a tapered hole. The tapered tube portion 12 is extended and formed on the The inner hollow of the cap unit 10, and the pipe diameter of the tapered tube portion 12 tapers toward the direction of the through hole 11. A distance is provided between the tapered tube portion 12 and the cap unit 10. In a preferred embodiment, the tapered tube portion 12 is set There is an inner ring block 121, the inner ring block 121 is extended and formed on the top end of the tapered tube part 12, the clamping groove 13 is concavely formed on the inner surface of the cap unit 10 away from the through hole 11 and surrounds the tapered tube part 12, the clamping The part 14 extends outward and is formed on the bottom end of the cap unit 10. The clamping part 14 communicates with the tapered tube part 12 and is provided with a clamping groove 141. The clamping groove 141 is concavely formed on the inner ring surface of the clamping part 141. , and the inner diameter of the clamping groove 141 is larger than the inner diameter of the tapered tube portion 12, the dust-proof sheet 15 is formed on the peripheral wall surface of the cap unit 10 adjacent to the perforation 11 and has a dust-proof effect. In a preferred embodiment, The cap unit 10 is made of a soft rubber material.

2 and 5, the aforementioned clamping unit 20 is connected to the cap unit 10 and has a positioning tube 21 and an extension tube 22. The positioning tube 21 is extended and formed on one side of the clamping unit 20 and is provided with a clip Forced ring groove 211, an outer ring block 212, electrical connector 213 and two piano wires 214, the clamped ring groove 211 is concavely formed at one end of the positioning tube 21 and the inner diameter of the clamped ring groove 211 is inward Tapered, the outer ring block 212 is protrudingly formed on the outer wall surface of the positioning tube 21 surrounding the opening end of the clamping ring groove 211, the positioning tube 21 penetrates into the cap unit 10 from the perforation 11 and is located between the tapered tube part 12 and Within the distance between the cap unit 10, the positioning tube 21 is surrounded by the inner wall of the cap unit 10, the clamping ring groove 211 is correspondingly accommodated and pressed against the tapered tube portion 12 of the cap unit 10, and the outer ring block 212 is correspondingly clamped. Closed in the clamping groove 13 of the cap unit 10, thereby strengthening the stability of the clamping unit 20 in the cap unit 10, the electrical socket 213 is arranged on the top of the tapered tube part 12 and is located in the positioning tube 21, and The electrical socket 213 communicates with the clamping groove 141. The two piano wires 214 are formed on the inner wall of the positioning tube 21 and extend to one side of the electrical socket 213. The extension tube 22 is formed in a different position than The other end of the positioning tube 21 of the clamping ring groove 211, in a preferred embodiment, the clamping unit 20 is made of a hard plastic material.

Please refer to shown in Fig. 4, the high-voltage cap that is used for spark plug of the present invention is to cooperate a spark plug 30 and be applied in the engine of automobile, motorcycle, and this spark plug 30 has a center electrode 31, a ceramic insulator 32, a steel body 33 and a ground electrode 34, the two ends of the center electrode 31 protrude respectively on both sides of the spark plug 30, the ceramic insulating part 32 covers the outside of the center electrode 31 to avoid leakage or short circuit during electrical connection, and the ceramic insulator A pressing pattern 321 is provided on the outer surface of the part 32. The steel body 33 is covered on the outside of the ceramic insulating part 32 for locking and dismounting. An ignition gap 341 is formed between them.

Please refer to Fig. 2 and Fig. 5, when combined, one end of the ceramic insulator 32 of the spark plug 30 penetrates the clamping part 14 of the cap unit 10, and is tightly fitted in the tapered tube part 12 through the clamping groove 141, so that The clamping part 14 abuts against the upper edge of the steel body 33, and the contact between the pressing lines 321 and the tapered pipe part 12 increases the friction between the two, and the inner ring block 121 of the tapered pipe part 12 is clad and clamped on the ceramic insulation. At the end of the tapered pipe part 32, since the pipe diameter of the tapered pipe part 12 gradually decreases toward the inside, when the ceramic insulating part 32 is in the bonding process, the ceramic insulating part 32 is gradually increased by the tight fitting force from the tapered pipe part 12, but During the tight fitting process, the tapered tube part 12 will be deformed due to the extrusion of the ceramic insulating part 32. Therefore, the inner ring wall surface of the clamping ring groove 211 of the positioning tube 21 is used to provide a reverse pressing force to limit The deformation of the tapered tube portion 12 and the clamping of the ceramic insulating portion 32 of the spark plug 30, finally, the center electrode 31 of the spark plug 30 is correspondingly loaded into the electrical socket 213, and the two piano wires 214 are abutted against the electric socket 213. On the outer ring surface of the center electrode 31, this further strengthens the tight fit strength of the spark plug 30. In addition, please refer to FIG. When the ceramic insulator 32 is installed, the pressing lines 321 and the inner wall surface of the tapered tube part 12 can form a close state after operating at a high temperature for a period of time. The tube diameter of the tube portion 12 tapers upwards and gradually deepens, which can strengthen the combination stability of the spark plug 30 and the tapered tube portion 12 .

The present invention forms a high pressure cap for the spark plug by means of a cap unit 10 of a soft material and a clamping unit 20 of a hard material. The clamping force of the clamping ring groove 211 can effectively improve the stability of the spark plug 30 installed in the high-voltage cap of the present invention, and when applied to automobiles and motorcycles, it can effectively withstand the vibration generated by automobiles and motorcycles during driving. Shake and vibrate to avoid engine flameout or poor contact caused by loose spark plugs.

The above descriptions are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art shall not Within the scope of the technical solution of the present invention, when the technical content disclosed above can be used to make some changes or modifications to equivalent embodiments of equivalent changes, as long as it does not depart from the technical solution of the present invention, the technical essence of the present invention is Any simple modifications, equivalent changes and modifications made in the above embodiments still fall within the scope of the technical solution of the present invention.

【Symbol Description】

10 cap unit 11 perforation

12 taper pipe part 121 inner ring block

13 Clip groove 14 Locking part

141 card slot 15 dustproof sheet

20 clamping unit 21 positioning tube

211 clamping ring groove 212 outer ring block

213 electric socket 214 piano steel wire

22 extension tube 30 spark plug

31 center electrode 32 ceramic insulating part

321 pressing pattern 33 steel body

34 Ground electrode 341 Ignition gap

Claims (10)

1. A high-pressure cap for a spark plug, comprising: A cap unit, the cap unit is a hollow tube body and has a perforation, a tapered tube part and a locking part, the perforation is formed on the top of the cap unit and communicates with the hollow part of the cap unit, the tapered tube part The extension is formed in the cap unit and the pipe diameter of the tapered pipe part is tapered toward the perforation direction. The clamping part is extended and formed at the bottom end of the cap unit. The clamping part communicates with the tapered tube part and is provided with a clamp a slot, the locking slot is concavely formed on the inner ring surface of the locking part; and A clamping unit, which is connected to the cap unit and has a positioning tube and an extension tube, the positioning tube is formed on one side of the clamping unit and is provided with a clamping ring groove, and the clamping ring groove is formed on one end of the positioning tube And the inner diameter of the clamping ring groove is tapered inward, the positioning tube is passed through the perforation and is surrounded by the cap unit, the clamping ring groove of the positioning tube accommodates and presses the tapered tube part of the cap unit, and the extension tube extends It is formed at the other end of the positioning tube which is different from the clamping ring groove. 2. The high-pressure cap used for spark plugs as claimed in claim 1, wherein the cap unit has a clamping groove, and a distance is provided between the tapered tube portion and the cap unit, and the clamping groove is concavely formed on the cap unit away from the perforation On the inner side of the clamping unit and around the tapered pipe part, the positioning tube of the clamping unit is provided with an outer ring block. The outer ring block is protrudingly formed on the outer wall surface of the positioning tube surrounding the clamping ring groove. and located within the distance between the tapered tube portion and the cap unit, the outer ring block is engaged in the clamping groove of the cap unit correspondingly. 3. The high-voltage cap for a spark plug according to claim 1 or 2, characterized in that the diameter of the perforated hole gradually increases downwards from the top of the cap unit. 4. The high-voltage cap for a spark plug according to claim 1, wherein the cap unit is made of rubber. 5. The high-voltage cap for a spark plug according to claim 1, wherein the clamping unit is made of plastic material. 6. The high-voltage cap for a spark plug as described in any one of claims 1, 2, 4 and 5, wherein the positioning tube is provided with an electric socket and two piano wires, and the electric socket is arranged on The top end of the tapered tube part communicates with the clamping groove of the clamping part, and the two piano wires are formed on the inner wall of the positioning tube and extend to one side of the electric socket. 7. The high-voltage cap used for spark plugs as claimed in claim 3, wherein the positioning tube is provided with an electric socket and two piano wires, and the electric socket is arranged on the top of the tapered tube part and is clamped with the The clamping grooves of the two parts communicate with each other, and the two piano wires are formed on the inner wall of the positioning tube and extend to one side of the electrical socket. 8. The high-pressure cap for a spark plug as claimed in claim 3, wherein the conical tube part is provided with an inner ring block, and the inner ring block is extended and formed on the top end of the conical tube part. 9. The high-voltage cap for a spark plug as claimed in claim 8, wherein a spark plug is further provided, the spark plug has a ceramic insulating portion, and a pressing pattern is arranged on the outer peripheral surface of the ceramic insulating portion, and the ceramic insulating portion Penetrate into the clamping part of the cap unit and tightly fit in the tapered tube part. The pressing lines and the tapered tube part form a tight state. The tightness of the pressing lines and the tapered tube part increases with the diameter of the tapered tube part. tapering and gradually deepening. 10. The high voltage cap for a spark plug according to claim 7, wherein the cap unit has a dustproof sheet formed on a peripheral wall surface of the cap unit adjacent to the perforation.