TW201608790A - High pressure cap for spark plug - Google Patents

Abstract

This invention includes a cap unit and a clamping unit. The cap unit includes a through hole, a cone portion and a holding portion. The through hole is connected with the cap unit. The cone portion is formed inside the cap unit and tapers towards the through hole. The holding portion extends outwards to be formed at the bottom of the cap unit and is provided with a holding socket. The holding socket is formed inside the holding portion. The clamping unit includes a positioning tube and an extension tube. The positioning tube is provided with a clamp-forcing ring groove, which is formed at one end of the positioning tube with its inner diameter tapering inwards. The positioning tube penetrates through the cap unit and is wrapped. The clamp-forcing unit holds the cone portion tightly. When the spark plug penetrates through the holding portion, the spark plug is pressed and held by the cone portion. The spark plug is further fastened by a compelling force of the positioning tube so that the spark plug will not fall off due to shaking or vibration.

Description

High pressure cap for Mars plug

The present invention is a high pressure cap and refers to a high pressure cap mechanism for incorporating a spark plug.

Mars plug is a kind of component used in steam and locomotive engines. The spark plug is installed in the combustion chamber of an internal combustion engine as an ignition component. The electric spark is generated by energization to ignite the gasoline and air mixture in the internal combustion engine, thereby generating power. In order to push the engine, the main structure of the existing Mars plug has 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 characteristics, and the insulating ceramic surrounds the center. The electrode can prevent leakage when the central electrode is energized. The steel body is covered with insulating ceramic and the upper half thereof is formed in a hexagonal shape, and the lower portion is provided with a screw, which is bent and formed outside the spark plug and forms a contact with the center electrode. A small gap that, when energized, creates an arc for ignition.

The steel body part of the Mars plug can be fixed at the engine of the steam and the locomotive, and the insulating ceramic is covered by a high-pressure cap. The existing high-voltage cap is internally provided with an electrical connection portion for electrically connecting the central electrode of the existing spark plug; However, after the existing high-pressure cap is combined with the Mars plug, since the high-pressure cap is a soft rubber material, the existing high-pressure cap has insufficient pressing force for the spark plug, and during the running of the vehicle, it is easy to cause the spark to be plugged by the steam. The engine of the locomotive is loose, which causes the engine to stall or the spark plug to be in poor contact.

In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention improves the existing high-pressure cap, and when combined with the spark plug, can strengthen the tightening force for the spark plug, thereby avoiding the disadvantage that the spark plug is easily loosened due to vibration. .

In order to achieve the above object, the technical means adopted by the present invention is to provide a high pressure cap for a spark plug, comprising: a cap unit, which is a hollow tube body and has a perforation and a cone portion And a card portion formed at a top end of the cap and communicating with a hollow portion of the cap unit, the tapered tube portion extendingly formed in the cap unit and the tube diameter of the tapered tube portion is tapered toward the perforation direction, the card The clamping portion is outwardly formed at a bottom end of the cap unit, the engaging portion is connected to the tapered tube portion and is provided with a latching groove, the latching groove is concavely formed on the inner ring surface of the latching portion; and a clip a solid unit coupled to the cap unit and having a positioning tube and an extension tube formed on one side of the clamping unit and provided with a clamping ring groove formed at one end of the positioning tube and the clamping tube The inner tube of the clamping ring groove is tapered radially, and the positioning tube is disposed in the perforation and surrounded by the cap unit. The clamping tube of the positioning tube accommodates the ring groove and presses the cone portion of the cap unit, and the extension tube is extended and formed. In the positioning tube different from the clamping ring groove Ends.

The invention is used for combining the spark plug, when the spark plug is inserted from the clamping portion of the cap unit, the ceramic insulating portion of the spark plug is pressed by the cone portion, and the spark plug is further clamped by the pressing force of the positioning tube. To avoid loosening of the spark plug due to shaking or vibration.

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

Referring to FIG. 1 , the high pressure cap for the spark plug of the present invention comprises a cap unit 10 and a clamping unit 20 .

As shown in FIG. 2 to FIG. 4 , the cap unit 10 is a hollow tube body and has a through hole 11 , a tapered tube portion 12 , a clamping slot 13 , a latching portion 14 and a dustproof sheet 15 . The through hole 11 is formed at the top end of the cap unit 10 and communicates with the inner hollow portion of the cap unit 10. The diameter of the perforation 11 gradually increases downward from the top end of the cap unit 10 and forms a tapered hole, and the tapered tube portion 12 is extended to form a cap. The inner diameter of the unit 10 is hollow, and the diameter of the tapered tube portion 12 is tapered toward the through hole 11 . The tapered tube portion 12 is spaced apart from the cap unit 10 . In the preferred embodiment, the tapered tube portion 12 is provided. An inner ring block 121 is formed at the top end of the tapered tube portion 12, and the clip groove 13 is concavely formed on the inner side surface of the cap unit 10 away from the through hole 11 and surrounds the tapered tube portion 12, and the card is placed The portion of the latching portion 14 is formed on the inner surface of the latching portion 141. The latching portion 141 is formed in the inner ring surface of the latching portion 141. The inner diameter of the card slot 141 is larger than the inner diameter of the tapered tube portion 12, and the dustproof sheet 15 is formed at the cap unit 10 adjacent to the through hole 11. The outer wall surface has a dustproof effect. In the preferred embodiment, the cap unit 10 is made of a soft rubber material.

As shown in FIG. 2 and FIG. 5 , the 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 formed on one side of the clamping unit 20 and is provided with a a clamping ring groove 211, an outer ring block 212, an electrical socket 213 and two piano steel wires 214, the clamping ring groove 211 is concavely formed at one end of the positioning pipe 21 and the inner diameter of the clamping ring groove 211 Inwardly tapered, the outer ring block 212 is convexly formed on the outer wall surface of the positioning tube 21 surrounding the open end of the clamping ring groove 211. The positioning tube 21 penetrates into the cap unit 10 from the through hole 11 and is located at the taper tube. The positioning tube 21 is surrounded by the inner wall surface of the cap unit 10, and the clamping ring groove 211 correspondingly receives and presses the taper tube portion 12 of the cap unit 10, and the outer ring block 212 is correspondingly engaged in the clamping slot 13 of the cap unit 10, thereby reinforcing the stability of the clamping unit 20 disposed in the cap unit 10, the electrical socket 213 is disposed at the top end of the tapered tube portion 12 and located in the positioning tube 21 The electric socket 213 is in communication with the card slot 141, and the two steel wires 214 are formed on the inner wall surface of the positioning tube 21 and extend in the electric A side cover 213, the extension tube 22 extends is different from that formed in the clamp groove 211 forcing retaining ring 21 and the other end portion of the tube, in the preferred embodiment embodiment, the clamping means 20 is made of a rigid plastic material.

Referring to FIG. 2, the high-pressure cap for the spark plug of the present invention is matched with a spark plug 30 and applied to an engine of a steam or a locomotive. The spark plug 30 has a center electrode 31, a ceramic insulating portion 32, and a The steel body 33 and a grounding electrode 34, the two ends of the center electrode 31 respectively protrude on both sides of the spark plug 30, and the ceramic insulating portion 32 is wrapped on the outer side of the center electrode 31 to prevent leakage or short circuit when the electrical connection is made. An outer surface 321 is disposed on the outer surface of the ceramic insulating portion 32. The steel body 33 is wrapped on the outer side of the ceramic insulating portion 32 for locking and dismounting. The ground electrode 34 is bent to form an end surface of the steel body 33 and is centered. An ignition gap 341 is formed between the electrodes 31.

Referring to FIG. 2 and FIG. 5, when assembled, one end of the ceramic insulating portion 32 of the spark plug 30 penetrates into the latching portion 14 of the cap unit 10, and is tightly fitted in the tapered tube portion 12 through the latching groove 141. The clamping portion 14 is abutted against the upper edge of the steel body 33, and the friction between the two is increased by the contact between the pressing pattern 321 and the tapered tube portion 12, and the inner ring block 121 of the tapered tube portion 12 is covered and clamped. At the end of the ceramic insulating portion 32, since the diameter of the tapered portion 12 is gradually reduced toward the inside, when the ceramic insulating portion 32 is bonded, the ceramic insulating portion 32 is gradually increased by the tight force from the tapered portion 12. However, during the fitting process, the tapered tube portion 12 is deformed by the pressing of the ceramic insulating portion 32. Therefore, the inner ring wall surface of the ring groove 211 is biased by the positioning tube 21 to provide a reverse pressing force. To limit the deformation of the tapered tube portion 12 and to clamp the ceramic insulating portion 32 of the spark plug 30, finally, the center electrode 31 of the spark plug 30 is correspondingly inserted into the electrical socket 213, and the two steel wires 214 are resisted. The top of the outer ring surface of the center electrode 31 further strengthens the tightness of the spark plug 30, and please refer to FIG. 6 The tapered tube portion 12 is made of a soft rubber material, and is easily deformed by external force pressing and high temperature. When the ceramic insulating portion 32 is mounted, the inner surface of the rigid grain portion 321 and the tapered tube portion 12 is operated at a high temperature for a period of time. The close contact state can be formed, and the degree of adhesion between the tight groove and the tapered tube portion 12 gradually deepens as the tube of the tapered tube portion 12 tapers in the radial direction, which can strengthen the bonding stability between the spark plug 30 and the tapered tube portion 12. .

The present invention forms a high-pressure cap for a Mars plug by a combination of a soft material cap unit 10 and a rigid material clamping unit 20. When the present invention incorporates the Mars plug 30, it passes through the inner cone portion 12 and the positioning tube. The clamping force of the clamping ring groove 211 of 21 can effectively improve the stability of the Mars plug 30 installed in the invention. When applied to the steam locomotive, it can effectively withstand the shaking and vibration generated by the steam locomotive during driving. In order to avoid the loosening of the spark plug, the engine is turned off or the contact is poor.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention. A person skilled in the art can make some modifications or modifications to equivalent embodiments by using the above-disclosed technical contents without departing from the technical scope of the present invention. It is still within the scope of the technical solution of the present invention to make any simple modifications, equivalent changes and modifications to the above embodiments.

10‧‧‧Cap unit
11‧‧‧Perforation
12‧‧‧ Cone Tube Department
121‧‧‧ Inner ring block
13‧‧‧Clamp slot
14‧‧‧Card Department
141‧‧‧ card slot
15‧‧‧Dust sheet
20‧‧‧Clamping unit
21‧‧‧ Positioning tube
211‧‧‧Clamp ring groove
212‧‧‧ outer ring block
213‧‧‧Electrical socket
214‧‧‧Qin Steel Line
22‧‧‧ Extension tube
30‧‧‧Mars plug
31‧‧‧Center electrode
32‧‧‧Ceramic insulation
321‧‧‧Impressive lines
33‧‧‧Steel body
34‧‧‧Ground electrode
341‧‧‧Ignition gap

Figure 1 is a perspective view showing the appearance of the present invention. Figure 2 is an exploded view of the three-dimensional element of the present invention. Figure 3 is a side cross-sectional view of the clamping unit of the present invention. 4 is a partial cross-sectional side view showing the combination of the clamping unit of the present invention and a spark plug. Figure 5 is a diagram showing the relationship between the present invention and the Mars plug. Fig. 6 is an enlarged view showing the positioning relationship between the tapered pipe portion of the present invention and the ceramic insulating portion of the spark plug.

10‧‧‧Cap unit

12‧‧‧ Cone Tube Department

121‧‧‧ Inner ring block

13‧‧‧Clamp slot

14‧‧‧Card Department

141‧‧‧ card slot

15‧‧‧Dust sheet

20‧‧‧Clamping unit

21‧‧‧ Positioning tube

211‧‧‧Clamp ring groove

212‧‧‧ outer ring block

213‧‧‧Electrical socket

214‧‧‧Qin Steel Line

22‧‧‧ Extension tube

Claims (10)

A high pressure cap for a Mars plug, comprising: a cap unit, the cap unit is a hollow tube body and has a perforation, a tapered tube portion and a latching portion formed on the top end of the cap and connected a hollow portion of the cap unit, the tapered tube portion is formed in the cap unit and the tube diameter of the tapered tube portion is tapered toward the perforation direction, and the latch portion is outwardly extended to form a bottom end of the cap unit, the card The clamping portion is connected to the tapered tube portion and is provided with a locking groove, the locking groove is concavely formed on the inner annular surface of the locking portion; and a clamping unit 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 formed at one end of the positioning tube and tapered in the inner radial direction of the clamping ring groove, the positioning tube is worn Provided in the perforation and surrounded by the cap unit, the clamping tube of the positioning tube accommodates and closes the cone portion of the cap unit, and the extension tube is extended to form another end portion of the positioning tube different from the clamping ring groove. The high pressure cap for a Mars plug according to claim 1, wherein the cap unit has a clamping groove, and the tapered tube portion is spaced apart from the cap unit, and the clamping groove is concavely formed on the inner side of the cap unit away from the perforation. And surrounding the tapered tube portion, the positioning tube of the clamping unit is provided with an outer ring block, and the outer ring block is convexly formed on the outer wall surface of the positioning tube surrounding the clamping ring groove, and the positioning tube penetrates into the cap unit and is located at The taper tube portion is spaced from the cap unit, and the outer ring block is correspondingly engaged in the clip slot of the cap unit. A high pressure cap for a spark plug according to claim 1 or 2, wherein the aperture of the perforation is gradually increased from the top end of the cap unit. The high pressure cap for a Mars plug according to claim 1, wherein the cap unit is made of rubber. The high-pressure cap for a Mars plug according to claim 1, wherein the clamping unit is made of a plastic material. The high-pressure cap for a Mars plug according to any one of the preceding claims, wherein the positioning tube is provided with an electrical socket and two piano steel wires, and the electrical socket is provided with a top end of the cone portion and the locking portion The card is slotted, and the two steel wires are formed on the inner wall surface of the positioning tube and extend on one side of the electrical socket. The high-pressure cap for a Mars plug according to claim 3, wherein the positioning tube is provided with an electrical socket and two piano steel wires, and the electrical socket is disposed at a top end of the cone portion and is in communication with the card slot of the card portion The two steel wires are formed on the inner wall surface of the positioning tube and extend on one side of the electrical socket. A high pressure cap for a spark plug according to claim 3, wherein the tapered tube portion is provided with an inner ring block extending from the top end of the tapered tube portion. The high-pressure cap for a Mars plug according to claim 8, wherein a spark plug is further provided, the spark plug has a ceramic insulating portion, and a tight groove is arranged on a peripheral surface of the ceramic insulating portion, and the ceramic insulating portion penetrates The locking portion of the cap unit is tightly fitted in the tapered tube portion, and the tight pattern forms a close contact with the tapered tube portion, and the tightness of the tight line and the tapered tube portion is tapered in the radial direction of the tube of the tapered tube portion. And gradually deepen. A high pressure 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.