Double-ignition spark plug

Abstract

The utility model discloses a double-ignition spark plug, which comprises a threaded rod, a central electrode, a side electrode and a suspension electrode which are arranged at the top end of the threaded rod and are used for double ignition, and further comprises an expansion assembly which is arranged outside the threaded rod, is used for expanding the size of the threaded rod and comprises an expansion piece and an extrusion piece, the expansion piece is arranged on the outer wall of the threaded rod and used for being in threaded connection with an engine mounting hole, and the extrusion piece is arranged at the bottom end of the expansion piece. The design of the threaded rod and the expansion assembly is utilized, the expansion column is arranged outside the threaded rod in a sleeving mode, under the action of the first threads, the expansion column is in threaded connection with the threaded rod, and then the expansion column is in threaded connection with an installation hole of an engine through the second threads; the gap between the threaded rod and the mounting holes of different sizes can be filled, and meanwhile, under the pushing action of the extrusion piece, the threads are meshed more stably.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of spark plug, especially a spark plug with double ignition points. BACKGROUND

[0002] The spark plug is used for ignition of the automobile engine, the traditional spark plug only has a central electrode and a side electrode, and the existing spark plug increases a floating electrode between the central electrode and the side electrode, so that two electric sparks are generated after the spark plug is electrified, double ignition points are realized, and the combustion of gasoline is more sufficient.

[0003] When the spark plug is installed with the engine, one end of the electrode of the spark plug is inserted into the mounting hole of the engine, the threads on the inner wall of the mounting hole and the threads on the outer wall of the spark plug are engaged with each other, and the spark plug is fixedly installed with the engine, but the thread segment of the spark plug has a fixed size, and when the spark plug is installed on a cross-country vehicle, the spark plug cannot be installed due to different sizes of the mounting hole. UTILITY MODEL CONTENTS

[0004] The utility model discloses a spark plug with double ignition points, which solves the problems in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a spark plug with double ignition points, comprising a threaded rod, a central electrode, a side electrode and a floating electrode for double ignition points are arranged at the top end of the threaded rod, and further comprising:

[0006] An expansion assembly is arranged outside the threaded rod, the expansion assembly is used for expanding the size of the threaded rod, and the expansion assembly comprises an expansion piece and a pressing piece, the expansion piece is arranged on the outer wall of the threaded rod, the expansion piece is used for threaded connection with the mounting hole of the engine, and the pressing piece is arranged at the bottom end of the expansion piece.

[0007] Preferably, the bottom end of the central electrode, the side electrode and the floating electrode is fixedly connected with the top end of the threaded rod, and a protection electrode for protecting the central electrode is fixedly connected with the top end of the threaded rod.

[0008] Preferably, a metal shell is fixedly connected with the bottom end of the threaded rod, the pressing piece is arranged at the top end of the metal shell, and an insulating rod is fixedly connected with the bottom end of the metal shell.

[0009] Preferably, the expansion piece comprises:

[0010] An expansion column is arranged on the outer wall of the threaded rod, a circular through groove is formed in the top end of the expansion column, and the expansion column is sleeved on the outer wall of the threaded rod.

[0011] The first thread is formed on the inner wall of the circular through groove, and the first thread meshes with the thread on the outer wall of the threaded rod.

[0012] The second thread is formed on the outer wall of the threaded rod and is used to mesh with the thread on the inner wall of the engine mounting hole.

[0013] Preferably, the extrusion member comprises:

[0014] A push plate, the top of which has a round hole, and the threaded rod is inserted into the round hole;

[0015] Compression springs, a plurality of compression springs are disposed at the bottom end of the push plate, the top ends of the plurality of compression springs are fixedly connected to the bottom end of the push plate, and the bottom ends of the plurality of compression springs are fixedly connected to the top end of the metal housing.

[0016] Preferably, the plurality of compression springs are distributed in annularly spaced intervals.

[0017] The technical effects and advantages of this utility model are as follows:

[0018] This utility model utilizes the design of a threaded rod and an extension component. By sleeved an extension post on the outside of the threaded rod, the extension post is threadedly connected to the threaded rod under the action of the first thread. Then, the extension post is threadedly connected to the engine mounting hole through the second thread. By adding the extension post, the gap between the threaded rod and mounting holes of different sizes can be filled. At the same time, under the pushing action of the extrusion component, the threads mesh more firmly. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0020] Figure 2 This is a three-dimensional structural diagram of the spark plug of this utility model.

[0021] Figure 3 This is a three-dimensional structural diagram of the extension component of this utility model.

[0022] Figure 4 This is a three-dimensional structural diagram of the extension component of this utility model.

[0023] Figure 5 This is a three-dimensional structural diagram of the extrusion part of this utility model.

[0024] In the diagram: 1. Center electrode; 2. Side electrode; 3. Floating electrode; 4. Protective electrode; 5. Threaded rod; 6. Insulating rod; 7. Extension component; 71. Extension post; 72. First thread; 73. Second thread; 8. Extrusion component; 81. Push plate; 82. Extrusion spring; 9. Metal housing. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] This utility model provides, for example Figures 1-5 The spark plug shown includes a threaded rod 5, with a center electrode 1, a side electrode 2, and a floating electrode 3 for dual-ignition at the top end of the threaded rod 5, and further includes:

[0027] An extension assembly is disposed outside the threaded rod 5. The extension assembly is used to enlarge the size of the threaded rod 5. The extension assembly includes an extension member 7 and an extrusion member 8. The extension member 7 is disposed on the outer wall of the threaded rod 5 and is used for threaded connection with the engine mounting hole. The extrusion member 8 is disposed at the bottom end of the extension member 7.

[0028] The bottom ends of the center electrode 1, the side electrode 2 and the floating electrode 3 are all fixedly connected to the top end of the threaded rod 5, and the top end of the threaded rod 5 is fixedly connected to a protective electrode 4 for protecting the center electrode 1.

[0029] A metal housing 9 is fixedly connected to the bottom end of the threaded rod 5, an extrusion piece 8 is set at the top of the metal housing 9, and an insulating rod 6 is fixedly connected to the bottom end of the metal housing 9.

[0030] Furthermore, the center electrode 1, side electrode 2, suspension electrode 3, guard electrode 4, threaded rod 5, insulating rod 6, and metal housing 9 constitute the existing dual-core spark plug. Two electric sparks are formed between the center electrode 1, suspension electrode 3, and side electrode 2, thereby forming a dual-ignition of the spark plug on the engine, making the combustion of gasoline more complete. The threads on the outer wall of the threaded rod 5 mesh with the threads on the inner wall of the engine mounting hole.

[0031] Extension 7 includes:

[0032] An extension post 71 is provided with a circular through groove at its top end, and the extension post 71 is sleeved on the outer wall of the threaded rod 5.

[0033] The first thread 72 is formed on the inner wall of the circular through groove, and the first thread 72 meshes with the thread on the outer wall of the threaded rod 5.

[0034] The second thread 73 is formed on the outer wall of the threaded rod 5 and is used to mesh with the thread on the inner wall of the engine mounting hole.

[0035] Furthermore, when the spark plug is installed in the mounting hole of a multinational car engine, the different size of the mounting hole will cause a gap between the thread on the outer wall of the threaded rod 5 and the thread on the inner wall of the mounting hole, so the spark plug cannot be installed securely. The thickness of the extension post 71 corresponds to the gap between the threaded rod 5 and the mounting hole. By rotating the extension post 71, the extension post 71 and the threaded rod 5 are fixedly installed under the action of the first thread 72 and the thread on the outer wall of the threaded rod 5. Then, the spark plug is inserted into the mounting hole, and the spark plug is securely installed in the engine under the action of the second thread 73 and the thread of the mounting hole.

[0036] Extrusion part 8 includes:

[0037] Push plate 81, with a round hole at the top, through which threaded rod 5 is inserted;

[0038] Compression springs 82, multiple compression springs 82 are disposed at the bottom end of push plate 81, the top ends of multiple compression springs 82 are fixedly connected to the bottom end of push plate 81, and the bottom ends of multiple compression springs 82 are fixedly connected to the top end of metal housing 9.

[0039] Multiple compression springs are distributed in 82 rings at equal intervals.

[0040] Furthermore, the size of the push plate 81 is 0.8 times the size of the metal housing 9, and the size of the circular hole corresponds to the outer diameter of the threaded rod 5. Thus, the push plate 81 can push various specifications of the expansion column 71. The number of compression springs 82 is at least three. The top and bottom ends of the compression springs 82 are fixed by adhesive at the contact points with the bottom end of the expansion column 71 and the top end of the metal housing 9, respectively. After the expansion column 71 and the threaded rod 5 are threadedly installed, the compression springs 82 are in a compressed state. Thus, the compression springs 82 push the push plate 81 to move away from the metal housing 9. The push plate 81 pushes the expansion column 71, and the expansion column 71 causes the first thread 72 and the threaded rod 5 to squeeze against each other, thereby preventing the expansion column 71 from loosening with the threaded rod 5 and ensuring the connection of the expansion column 71 is stable.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-ignition spark plug, comprising a threaded rod (5), wherein the top end of the threaded rod (5) is provided with a center electrode (1), a side electrode (2), and a floating electrode (3) for dual-ignition, characterized in that, Also includes: An extension component is provided outside the threaded rod (5). The extension component is used to enlarge the size of the threaded rod (5). The extension component includes an extension part (7) and an extrusion part (8). The extension part (7) is provided on the outer wall of the threaded rod (5). The extension part (7) is used to be threaded to the engine mounting hole. The extrusion part (8) is provided at the bottom end of the extension part (7).

2. The spark plug with dual-ignition according to claim 1, characterized in that, The bottom ends of the center electrode (1), side electrode (2) and suspension electrode (3) are all fixedly connected to the top end of the threaded rod (5), and the top end of the threaded rod (5) is fixedly connected to a protective electrode (4) for protecting the center electrode (1).

3. The spark plug with dual-ignition according to claim 1, characterized in that, The bottom end of the threaded rod (5) is fixedly connected to a metal shell (9), the extrusion member (8) is set at the top of the metal shell (9), and the bottom end of the metal shell (9) is fixedly connected to an insulating rod (6).

4. The spark plug with dual-ignition according to claim 1, characterized in that, The extension (7) includes: An extension post (71) is provided with a circular through groove at its top end, and the extension post (71) is sleeved on the outer wall of the threaded rod (5). The first thread (72) is formed on the inner wall of the circular through groove, and the first thread (72) meshes with the thread on the outer wall of the threaded rod (5). The second thread (73) is formed on the outer wall of the threaded rod (5) and is used to mesh with the thread on the inner wall of the engine mounting hole.

5. A spark plug with dual-ignition according to claim 3, characterized in that, The extrusion member (8) includes: Push plate (81), the top of the push plate (81) is provided with a round hole, and the threaded rod (5) is inserted into the inside of the round hole; Compression springs (82) are provided at the bottom end of the push plate (81), and the top ends of the compression springs (82) are fixedly connected to the bottom end of the push plate (81). The bottom ends of the compression springs (82) are fixedly connected to the top end of the metal housing (9).

6. A spark plug with dual-ignition according to claim 5, characterized in that, The multiple compression springs (82) are distributed in a ring at equal intervals.

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