Spark plug with vibration-resistant side pole

Abstract

The spark plug comprises a metal shell and a connecting solenoid fixedly connected to the bottom end of the metal shell, the bottom end of the connecting solenoid is provided with a side electrode, and the bottom end of the connecting solenoid is symmetrically provided with an anti-impact structure used for reducing the shaking amplitude of the side electrode. The shock resistance structure comprises clamping sleeves which are symmetrically arranged, energy absorption pieces used for absorbing vibration of the side electrodes are arranged on the sides, away from the side electrodes, of the clamping sleeves, and an electrode structure used for being matched with the side electrodes to generate electric arcs is arranged in the metal shell. Vibration generated on the side electrode is absorbed through the clamping sleeve arranged in the side electrode, meanwhile, the vibration is transmitted to the energy absorption piece to be absorbed and released, the shaking amplitude of the side electrode is reduced, and the situation that due to vibration of the side electrode, a stable strong electric arc cannot be formed between the side electrode and the center electrode, and the normal ignition action of the spark plug is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the field of spark plugs, in particular to a spark plug with a side pole resistant to vibration. Background Art

[0002] The spark plug is one of the key components of the engine. It is used to ignite the mixed gas in the automobile engine, thereby generating explosive combustion and driving the automobile to work. The mixed gas is ignited by generating a strong electric arc between the center electrode and the side electrode. However, when the automobile is started and used, the engine described by the spark plug will form high-frequency and rapid vibrations. Since the existing side electrode is arranged in an L-shaped long strip at the ignition end of the spark plug without a corresponding anti-vibration structure, the side of the side electrode away from the spark plug body will shake when subjected to high-frequency vibration, affecting the stable arc formed with the center electrode. Utility Model Content

[0003] The utility model aims to provide a spark plug with a side pole resistant to vibration, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a spark plug with side electrode vibration resistance, comprising a metal shell and a connecting screw fixedly connected to the bottom end of the metal shell, a side electrode is arranged at the bottom end of the connecting screw, an impact-resistant structure for reducing the shaking amplitude of the side electrode is symmetrically arranged at the bottom end of the connecting screw, the impact-resistant structure comprises a symmetrically arranged jacket, an energy-absorbing part for absorbing the vibration of the side electrode is arranged on the side of the jacket away from the side electrode, and an electrode structure for cooperating with the side electrode to generate an arc is arranged inside the metal shell.

[0005] Preferably, the energy absorbing member comprises an elastic block, a sliding block is arranged on one side of the elastic block, a connecting rod is fixedly connected to one side of the sliding block, and a side of the connecting rod away from the sliding block is fixedly connected to a side of the jacket away from the side electrode.

[0006] Preferably, the bottom end of the connecting spiral tube is symmetrically fixedly connected with a support block, the bottom end of the support block is fixedly connected with a fixed sleeve, and the elastic block and the sliding block are both arranged inside the fixed sleeve.

[0007] Preferably, the cross section of the support block is set to be trapezoidal.

[0008] Preferably, a damping sleeve is fixedly connected inside the fixing sleeve, and the inner wall of the damping sleeve and the outer wall of the sliding block are slidably and interlacedly connected.

[0009] Preferably, the electrode structure comprises a precious metal electrode, the top of the precious metal electrode is fixedly connected to a copper core, the top of the copper core is fixedly connected to a conductive screw, the top of the conductive screw is fixedly connected to a wiring nut, and the outer wall of the copper core is sheathed with an anti-interference resistor sheath.

[0010] Preferably, a ceramic body is inserted and connected to the inner wall of the metal shell, and the copper core, the conductive screw and the anti-interference resistor sleeve are all arranged inside the ceramic body.

[0011] Preferably, a sealing gasket is provided at the bottom end of the metal shell and at the top of the connecting spiral tube, and an arc-proof bellows for preventing arc splashing is provided at the top end of the ceramic body.

[0012] Technical effects and advantages of the utility model:

[0013] The utility model provides a corresponding anti-vibration structure at the bottom end of the connecting spiral tube, utilizes the jacket provided therein to absorb the vibration generated on the side electrode, and transmits the vibration to the energy absorbing member for absorption and release, thereby reducing the shaking amplitude of the side electrode, and avoiding the failure to form a stable strong arc between the side electrode and the center electrode due to the vibration of the side electrode, thereby affecting the normal ignition action of the spark plug. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a sectional view of the overall structure of the utility model.

[0015] Figure 2 For this utility model Figure 1 A magnified view of the structure in the middle.

[0016] Figure 3 This is a bottom view of the anti-vibration structure of the utility model.

[0017] In the figure: 1. Metal shell; 2. Connecting screw; 3. Side electrode; 4. Jacket; 5. Connecting rod; 6. Sliding block; 7. Elastic block; 8. Fixed sleeve; 801, Damping sleeve; 9. Support block; 10. Precious metal electrode; 11. Copper core; 12. Conductive screw; 13. Wiring nut; 14. Anti-interference resistor sleeve; 15. Ceramic body; 16. Anti-flashover bellows; 17. Sealing gasket. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] The utility model provides Figure 1-3A side-electrode vibration-resistant spark plug shown in the figure comprises a metal shell 1 and a connecting spiral tube 2 fixedly connected to the bottom end of the metal shell 1, a side electrode 3 is arranged at the bottom end of the connecting spiral tube 2, an impact-resistant structure for reducing the shaking amplitude of the side electrode 3 is symmetrically arranged at the bottom end of the connecting spiral tube 2, the impact-resistant structure comprises a symmetrically arranged jacket 4, an energy-absorbing part for absorbing the vibration of the side electrode 3 is arranged on the side of the jacket 4 away from the side electrode 3, and an electrode structure for cooperating with the side electrode 3 to generate an arc is arranged inside the metal shell 1.

[0020] It should be noted that, by providing a corresponding anti-vibration structure at the bottom end of the connecting spiral tube 2, the jacket 4 provided therein absorbs the vibration generated on the side electrode 3, and transmits the vibration to the energy absorbing part for absorption and release, thereby reducing the shaking amplitude of the side electrode 3, and avoiding the failure to form a stable strong arc between the side electrode 3 and the center electrode due to the vibration of the side electrode 3, thereby affecting the normal ignition action of the spark plug. Furthermore, the metal shell 1 and the connecting spiral tube 2 are usually supported by aluminum alloy material, which has good stability and ensures the position stability of the overall spark plug connection. The side electrode 3 is made of nickel alloy or platinum material, which has good strength, heat resistance and corrosion resistance and is suitable for high temperature and high pressure engine environments. At the same time, the side electrode 3 and the connecting spiral tube 2 are fixedly connected by welding to ensure the stability of the connection. Furthermore, the overall shape of the jacket 4 is set to be a "C" shape, and its inner wall is slidably and interlaced with the bottom of the side electrode 3. At the same time, the jacket 4 is made of a hard ceramic material with insulating characteristics, which ensures a certain strength while not affecting the normal arc generation of the side electrode 3.

[0021] The energy absorbing member comprises an elastic block 7 , a sliding block 6 is arranged on one side of the elastic block 7 , a connecting rod 5 is fixedly connected to one side of the sliding block 6 , and a side of the connecting rod 5 away from the sliding block 6 is fixedly connected to a side of the jacket 4 away from the side electrode 3 .

[0022] Furthermore, the elastic block 7 is also made of an elastic rubber material with insulating characteristics. The sliding of the side electrode 3 is converted into elastic potential energy storage of the elastic block 7 by squeezing the sliding block 6 through the connecting rod 5 and the sliding block 6 made of the same material as the jacket 4, thereby reducing the shaking amplitude of the side electrode 3.

[0023] The bottom end of the connecting spiral tube 2 is symmetrically fixedly connected with a supporting block 9 , the bottom end of the supporting block 9 is fixedly connected with a fixing sleeve 8 , and the elastic block 7 and the sliding block 6 are both arranged inside the fixing sleeve 8 .

[0024] The damping sleeve 801 is fixedly connected inside the fixed sleeve 8, and the inner wall of the damping sleeve 801 is slidably interlaced with the outer wall of the sliding block 6. Furthermore, the overall shape of the support block 9 is set to be trapezoidal, which has good structural stability. At the same time, the support block 9 and the fixed sleeve 8 are also made of hard ceramic material, and the two are connected in an integrated manner. The position of the overall anti-vibration structure is fixed by sliding the sliding block 6 in the fixed sleeve 8. At the same time, the friction between the damping sleeve 801 set in the fixed sleeve 8 and the sliding block 6 is used to release the elastic potential energy stored in the elastic block 7 through friction, so as to prevent the jacket 4 from shaking repeatedly.

[0025] The electrode structure includes a precious metal electrode 10, a copper core 11 is fixedly connected to the top of the precious metal electrode 10, a conductive screw 12 is fixedly connected to the top of the copper core 11, a wiring nut 13 is fixedly connected to the top of the conductive screw 12, and an anti-interference resistor sleeve 14 is sleeved on the outer wall of the copper core 11.

[0026] Furthermore, the precious metal electrode 10 is usually made of platinum or iridium material, which has excellent wear resistance and high temperature resistance, and can maintain stable performance under high pressure and high temperature environment. The current is transferred to the precious metal electrode 10 through the conductive screw 12 and the copper core 11 through the wire nut 13 to form a stable strong arc with the side electrode 3.

[0027] A ceramic body 15 is inserted into the inner wall of the metal shell 1, a sealing gasket 17 is provided at the bottom of the metal shell 1 and at the top of the connecting spiral tube 2, an anti-arcing bellows 16 is provided at the top of the ceramic body 15 for preventing arc splashing, and the copper core 11, the conductive screw 12 and the anti-interference resistor sleeve 14 are all arranged inside the ceramic body 15.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spark plug with side electrode vibration resistance, comprising a metal shell (1) and a connecting solenoid (2) fixedly connected to the bottom end of the metal shell (1), wherein the bottom end of the connecting solenoid (2) is provided with a side electrode (3), characterized in that: The bottom end of the connecting spiral tube (2) is symmetrically provided with an impact-resistant structure for reducing the shaking amplitude of the side electrode (3), the impact-resistant structure comprises a symmetrically arranged jacket (4), a side of the jacket (4) away from the side electrode (3) is provided with an energy-absorbing member for absorbing the vibration of the side electrode (3), and an electrode structure for cooperating with the side electrode (3) to generate an arc is provided inside the metal shell (1).

2. A spark plug with side pole vibration resistance according to claim 1, characterized in that: The energy absorbing member comprises an elastic block (7), a sliding block (6) is arranged on one side of the elastic block (7), a connecting rod (5) is fixedly connected to one side of the sliding block (6), and a side of the connecting rod (5) away from the sliding block (6) is fixedly connected to a side of the jacket (4) away from the side electrode (3).

3. A spark plug with side pole vibration resistance according to claim 2, characterized in that: The bottom end of the connecting spiral tube (2) is symmetrically fixedly connected to a support block (9), the bottom end of the support block (9) is fixedly connected to a fixing sleeve (8), and the elastic block (7) and the sliding block (6) are both arranged inside the fixing sleeve (8).

4. A spark plug with side pole vibration resistance according to claim 3, characterized in that: The cross section of the support block (9) is arranged to be trapezoidal.

5. A spark plug with side pole vibration resistance according to claim 3, characterized in that: The fixing sleeve (8) is fixedly connected to a damping sleeve (801) inside, and the inner wall of the damping sleeve (801) and the outer wall of the sliding block (6) are slidably interlaced and connected.

6. A spark plug with side pole vibration resistance according to claim 1, characterized in that: The electrode structure comprises a noble metal electrode (10), the top end of the noble metal electrode (10) being fixedly connected to a copper core (11), the top end of the copper core (11) being fixedly connected to a conductive screw (12), the top end of the conductive screw (12) being fixedly connected to a wiring nut (13), and the outer wall of the copper core (11) being sheathed with an anti-interference resistor sheath (14).

7. A spark plug with side pole vibration resistance according to claim 6, characterized in that: A ceramic body (15) is inserted and connected to the inner wall of the metal shell (1), and the copper core (11), the conductive screw (12) and the anti-interference resistor sleeve (14) are all arranged inside the ceramic body (15).

8. A spark plug with side pole vibration resistance according to claim 7, characterized in that: A sealing gasket (17) is sleeved on the bottom end of the metal shell (1) and located on the top of the connecting spiral tube (2), and an arc-proof bellows (16) for preventing arc splashing is arranged on the top end of the ceramic body (15).

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