Pre-combustion chamber spark plug airtightness testing device

Abstract

The utility model belongs to the technical field of spark plug testing, and particularly relates to a pre-combustion chamber spark plug airtightness testing device which comprises a detector. A base is mounted on the side wall of the detector; a protection box is fixedly connected to the top of the base; the middle part of the protection box is fixedly connected with a fixed plate; the fixing plate is fixedly connected to the interior of the protection box; the middle part of the fixed plate is fixedly connected with a test interface; a protective door is hinged to the side wall of the protective box; a fixing groove is formed in the top of the base; the bottom of the fixing groove is fixedly connected with an electric push rod. The output end of the electric push rod is fixedly connected with a motor; the output end of the motor is fixedly connected with a supporting plate. Two fixing rods are fixedly connected to the top of the supporting plate; the two fixing rods are oppositely arranged; the spark plug can be effectively and automatically fixed on the test interface through clamping of the clamping plate, and proper pressure can be applied to the test interface, so that the problem of inaccurate test data caused by insufficient tightness due to insufficient strength generated by manual fixation of the spark plug is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of spark plug testing, in particular to an airtight testing device for a pre-combustion chamber spark plug. Background Art

[0002] Spark plugs are important components in gasoline engine ignition systems. Pre-combustion chamber spark plugs are an improved design based on traditional spark plugs.

[0003] The pre-combustion chamber spark plug is a small cavity on the engine that is connected to the main combustion chamber by one or more holes. The spark plug mainly introduces high voltage electricity into the combustion chamber and makes it jump over the electrode gap to generate sparks, thereby igniting the combustible mixture in the cylinder. During the spark plug production process, in order to ensure the sealing of the spark plug during use, an airtight test will be carried out. Usually, one end of the spark plug is connected to the test interface, and then a certain pressure is applied to the inside of the spark plug for detection.

[0004] When testing a spark plug, it is usually connected to a test interface manually. However, it is found that insufficient force is easily generated when the spark plug is manually fixed to the test interface, resulting in the spark plug and the test interface not being tight enough, causing inaccurate test data.

[0005] To this end, the utility model provides a pre-combustion chamber spark plug air tightness testing device. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a pre-combustion chamber spark plug airtightness test device described in the utility model comprises a detector; a base is installed on the side wall of the detector; a protective box is fixedly connected to the top of the base; a fixing plate is fixedly connected to the middle of the protective box; the fixing plate is fixedly connected to the inside of the protective box; a test interface is fixedly connected to the middle of the fixing plate; a protective door is hinged on the side wall of the protective box; a fixing groove is opened on the top of the base; an electric push rod is fixedly connected to the bottom of the fixing groove; a motor is fixedly connected to the output end of the electric push rod; a support plate is fixedly connected to the output end of the motor; two fixing rods are fixedly connected to the top of the support plate; the two fixing rods are arranged oppositely; a telescopic rod is fixedly connected to the side wall of the fixing rod; a spring is fixedly connected to the side wall of the fixing rod; The spring is fixedly connected to the outside of the telescopic rod; the telescopic rod and the spring end are fixedly connected with a clamping plate; the clamping plate is arranged in an arc shape; the spark plug can be automatically fixed on the test interface by clamping the clamping plate, and appropriate pressure can be applied to the test interface, effectively reducing the problem of insufficient force and insufficient tightness caused by manual fixation of the spark plug, resulting in inaccurate test data, making the connection between the spark plug and the test interface stable and tight, effectively reducing the problem of accidental falling off or movement of the spark plug during the test, effectively reducing the problem of test errors caused by spark plug position deviation, effectively reducing gas leakage of the spark plug during the detection process, effectively reducing the time and energy required for manual adjustment of the spark plug position, and effectively improving the accuracy of the spark plug test.

[0008] Preferably, an air pump is fixedly connected to the top of the protective box; an exhaust pipe is fixedly connected to the side wall of the air pump; the middle part of the exhaust pipe passes through the top of the protective box; the middle part of the exhaust pipe is fixedly connected to both sides of the protective box; two heating wires are fixedly connected to the middle part of the exhaust pipe; multiple groups of exhaust holes are fixedly connected to the middle part of the exhaust pipe; the multiple groups of exhaust holes are arranged oppositely; the temperature of the test environment can be effectively controlled by controlling the heating wires for temperature adjustment, the actual working conditions can be simulated to perform airtightness tests at different temperatures, the airtightness performance of the spark plug at different temperatures can be comprehensively evaluated, and the degree and trend of the influence of temperature on the airtightness of the spark plug can be understood, which can be discovered and repaired in time to improve the reliability and durability of the spark plug.

[0009] Preferably, a threaded seat is threadedly connected to the middle part of the test interface; the middle part of the threaded seat is hollow; a connecting seat is fixedly connected to the end of the threaded seat; different types of spark plugs can be tested by replacing the connecting seat, and the replacement can be carried out quickly, which effectively improves the versatility and flexibility of the test, enables different types of spark plugs to be accurately tested, and effectively reduces the need to replace test equipment for testing different types of spark plugs, thereby effectively reducing the testing cost of the spark plugs.

[0010] Preferably, a cavity is provided in the middle of the connecting seat; the cavity is provided near the top of the connecting seat; an oil inlet pipe is fixedly connected to the top of the connecting seat; a plurality of oil outlet holes are provided at the bottom of the cavity; by covering the contact surface between the connecting seat and the spark plug with lubricating oil, the spark plug can be effectively screwed in and out of the connecting seat smoothly during the test, which can effectively reduce the friction between the spark plug and the inside of the connecting seat, effectively reduce the wear between the test interface and the connecting seat, and effectively improve the smoothness of the test.

[0011] Preferably, a connecting rod is fixedly connected to the bottom of the connecting seat; a plurality of groups of bristles are fixedly connected to the middle part of the connecting rod; the ends of the plurality of groups of bristles are arranged inwardly; the spark plug connection position can be effectively cleaned by the bristles, and the accumulation of dust, impurities or oil on the surface of the spark plug can be effectively reduced, which can effectively reduce the obstruction of dust and impurities to the correct connection between the spark plug and the connecting seat, and effectively make the spark plug accurately enter the middle part of the test interface, thereby effectively improving the accuracy of the spark plug test.

[0012] Preferably, a rubber pad is installed in the middle of the clamping plate; the rubber pad is fixedly connected to the middle of the clamping plate; the contact between the rubber pad and the surface of the spark plug can make the clamping plate fit the surface of the spark plug more closely, which can effectively increase the contact area between the spark plug and the clamping plate, and the rubber pad can compensate for the dents on the surface of the spark plug, making the spark plug more stable when fixed.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The pre-combustion chamber spark plug air tightness test device described in the utility model can effectively and automatically fix the spark plug on the test interface through the clamping plate, and can apply appropriate pressure to the test interface, effectively reducing the problem of insufficient force caused by manual fixation of the spark plug, resulting in insufficient tightness and inaccurate test data.

[0015] 2. The pre-combustion chamber spark plug airtightness test device described in the utility model can effectively control the temperature of the test environment by controlling the temperature of the heating wire, can simulate actual working conditions to perform airtightness tests at different temperatures, and can comprehensively evaluate the airtightness performance of the spark plug at different temperatures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a stereoscopic diagram of a pre-combustion chamber spark plug airtightness test device in the utility model;

[0018] Figure 2 It is a structural schematic diagram of the clamping plate in the utility model;

[0019] Figure 3It is a schematic diagram of the structure of the hollow cavity in the utility model;

[0020] Figure 4 It is a structural schematic diagram of the connecting seat in the utility model;

[0021] Figure 5 It is a schematic diagram of the structure of the exhaust pipe in the utility model;

[0022] Figure 6 It is a structural schematic diagram of the sealing strip in the utility model;

[0023] In the figure: 1. fixing groove; 10. electric push rod; 11. motor; 12. support plate; 13. fixing rod; 14. telescopic rod; 15. spring; 16. clamping plate; 2. air pump; 21. exhaust pipe; 22. heating wire; 23. exhaust hole; 3. threaded seat; 31. connecting seat; 4. cavity; 41. oil inlet pipe; 42. oil outlet; 5. connecting rod; 51. bristles; 6. rubber pad; 7. sealing strip; 8. detector; 81. base; 82. fixing plate; 83. test interface; 84. protective box; 85. protective door. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0025] like Figures 1 to 5As shown, a pre-combustion chamber spark plug airtightness test device described in an embodiment of the utility model comprises a detector 8; a base 81 is installed on the side wall of the detector 8; a protective box 84 is fixedly connected to the top of the base 81; a fixing plate 82 is fixedly connected to the middle of the protective box 84; the fixing plate 82 is fixedly connected to the inside of the protective box 84; a test interface 83 is fixedly connected to the middle of the fixing plate 82; a protective door 85 is hinged on the side wall of the protective box 84; a fixing groove 1 is opened on the top of the base 81; an electric push rod 10 is fixedly connected to the bottom of the fixing groove 1; a motor 11 is fixedly connected to the output end of the electric push rod 10; The output end of the machine 11 is fixedly connected to a support plate 12; two fixing rods 13 are fixedly connected to the top of the support plate 12; the two fixing rods 13 are arranged opposite to each other; a telescopic rod 14 is fixedly connected to the side wall of the fixing rod 13; a spring 15 is fixedly connected to the side wall of the fixing rod 13; the spring 15 is fixedly connected to the outside of the telescopic rod 14; a clamping plate 16 is fixedly connected to the ends of the telescopic rod 14 and the spring 15; the clamping plate 16 is arranged in an arc shape; when working, the protective door 85 is arranged visually, and after the protective door 85 is opened, the spark plug is placed in the middle of the two clamping plates 16; the clamping plates 16 are squeezed by the spark plugs to move to both sides The spark plug is fixed to the middle of the support plate 12 by two clamping plates 16, the electric push rod 10 and the motor 11 are powered on and turned on, the electric push rod 10 is controlled to move upward, and the motor 11 is rotated at the same time, so that one end of the spark plug enters the middle of the test interface 83 and is connected to the test interface 83, the spark plug is pressed upward and fixed by the support plate 12, and then the protective door 85 is closed. After the detector 8 is turned on, a certain pressure of gas is applied to the inside of the spark plug, and the pressure change is observed at the same time. The spark plug can be clamped by the clamping plate 16 to effectively It is dynamically fixed on the test interface 83 and can apply appropriate pressure to the test interface 83, effectively reducing the problem of insufficient tightness caused by manual fixation of the spark plug, resulting in inaccurate test data, and making the connection between the spark plug and the test interface 83 stable and tight, effectively reducing the problem of accidental falling off or movement of the spark plug during the test, effectively reducing the problem of test errors caused by spark plug position deviation, effectively reducing gas leakage of the spark plug during the detection process, effectively reducing the time and effort required for manual adjustment of the spark plug position, and effectively improving the accuracy of the spark plug test.

[0026] like Figure 1 and Figure 5As shown, the top of the protection box 84 is fixedly connected to the air pump 2; the side wall of the air pump 2 is fixedly connected to the exhaust pipe 21; the middle part of the exhaust pipe 21 passes through the top of the protection box 84; the middle part of the exhaust pipe 21 is fixedly connected to both sides of the protection box 84; two heating wires 22 are fixedly connected to the middle part of the exhaust pipe 21; the middle part of the exhaust pipe 21 is fixedly connected to multiple groups of exhaust holes 23; the multiple groups of exhaust holes 23 are arranged oppositely; when working, during the detection of the spark plug, the air pump 2 is powered on and turned on to generate airflow inside the air pump 2, and the airflow is discharged into the exhaust pipe 21 through the air pump 2, and then the heating wire 22 is turned on to make the heating wire The heat on the surface of 22 rises, and the heating temperature of the heating wire 22 is controlled. The heat is transferred to the surface of the exhaust pipe 21 at the same time, so that the heat inside the exhaust pipe 21 rises rapidly, and the hot air flow is discharged to the inside of the protective box 84 through the multiple exhaust holes 23. The temperature can be adjusted by controlling the heating wire 22 to effectively control the temperature of the test environment, and the airtightness test can be performed at different temperatures to simulate the actual working conditions. The airtightness performance of the spark plug at different temperatures can be comprehensively evaluated, and the degree and trend of the temperature effect on the airtightness of the spark plug can be understood, which can be discovered and repaired in time to improve the reliability and durability of the spark plug.

[0027] like Figure 1 , Figure 3 , Figure 4 As shown, the middle part of the test interface 83 is threadedly connected with a threaded seat 3; the middle part of the threaded seat 3 is hollow; the end of the threaded seat 3 is fixedly connected to a connecting seat 31; during operation, when testing spark plugs of different sizes, corresponding threaded seats 3 are set according to the spark plugs of different sizes, the threaded seats 3 are installed inside the test interface 83, and then the corresponding spark plugs are installed inside the connecting seat 31, and a certain pressure of gas is applied to the inside of the spark plug through the threaded seat 3 and the middle part of the connecting seat 31. By replacing the connecting seat 31, spark plugs of different types can be tested and quickly replaced, which effectively improves the versatility and flexibility of the test, enables spark plugs of different types to be accurately tested, and effectively reduces the need to replace test equipment for testing spark plugs of different types, thereby effectively reducing the testing cost of the spark plugs.

[0028] like Figure 3 and Figure 4As shown, a cavity 4 is provided in the middle of the connecting seat 31; the cavity 4 is provided near the top of the connecting seat 31; an oil inlet pipe 41 is fixedly connected to the top of the connecting seat 31; a plurality of oil outlet holes 42 are provided at the bottom of the cavity 4; during operation, appropriate lubricating oil is added to one end of the oil inlet pipe 41, and the lubricating oil enters the cavity 4 through the oil inlet pipe 41. When the spark plug is installed in the middle of the connecting seat 31, the lubricating oil flows out along the inner wall of the connecting seat 31 through the oil outlet hole 42, so that a layer of lubricating oil is attached to the surface of the spark plug when it contacts the inner wall of the connecting seat 31. By covering the lubricating oil on the contact surface between the connecting seat 31 and the spark plug, the spark plug can be effectively screwed in and out of the connecting seat 31 smoothly during the test, which can effectively reduce the friction between the spark plug and the inside of the connecting seat 31, effectively reduce the wear between the test interface 83 and the connecting seat 31, and effectively improve the smoothness of the test.

[0029] like Figure 4 As shown, a connecting rod 5 is fixedly connected to the bottom of the connecting seat 31; a plurality of groups of bristles 51 are fixedly connected to the middle part of the connecting rod 5; the ends of the plurality of groups of bristles 51 are arranged inwardly; during operation, when the spark plug rotates into the interior of the connecting seat 31, the surface threads are cleaned by the ends of the bristles 51, so that the cleaned spark plug enters the interior of the connecting seat 31 for inspection, and the bristles 51 can effectively clean the spark plug connection position, effectively reduce the accumulation of dust, impurities or oil on the surface of the spark plug, and can effectively reduce the dust and impurities that hinder the correct connection between the spark plug and the connecting seat 31, and effectively make the spark plug accurately enter the middle of the test interface 83, thereby effectively improving the accuracy of the spark plug test.

[0030] like Figure 2 As shown, a rubber pad 6 is installed in the middle of the clamping plate 16; the rubber pad 6 is fixedly connected to the middle of the clamping plate 16; when working, when the spark plug is fixed by the two clamping plates 16, the spark plug first contacts the rubber pad 6, and the rubber pad 6 is fitted with the surface of the spark plug through the flexible setting. The contact between the rubber pad 6 and the surface of the spark plug can make the clamping plate 16 fit the surface of the spark plug more closely, which can effectively increase the contact area between the spark plug and the clamping plate 16, and the rubber pad 6 can make up for the dents on the surface of the spark plug, so that the spark plug is more stable when fixed.

[0031] like Figure 6 As shown, the side wall of the protection door 85 is fixedly connected with a sealing strip 7; the sealing strip 7 is fixedly connected to the side close to the protection box 84; during operation, when the protection door 85 is closed, the protection door 85 and the protection box 84 are sealed by the sealing strip 7, and the sealing strip 7 can effectively increase the closedness of the test environment, effectively reduce the internal temperature loss, and effectively reduce the impurities and moisture in the air from entering the test environment, effectively reduce the interference with the spark plug test results, and increase the accuracy and reliability of the spark plug airtightness test.

[0032] During operation, the protective door 85 is visually set. After the protective door 85 is opened, the spark plug is placed in the middle of the two clamping plates 16; the clamping plates 16 are squeezed by the spark plug to move to both sides, and the telescopic rod 14 and the spring 15 are contracted at the same time, and the spark plug is fixed in the middle of the support plate 12 through the two clamping plates 16. The electric push rod 10 and the motor 11 are powered on and turned on, and the electric push rod 10 is controlled to move upward, and at the same time, it is rotated by the motor 11, so that one end of the spark plug enters the middle of the test interface 83 and is connected to the test interface 83, and the spark plug is placed in the middle of the test interface 83 through the support plate 12. The spark plug is pressurized upward and fixed, and then the protective door 85 is closed. After the detector 8 is turned on, a certain pressure of gas is applied to the inside of the spark plug, and the pressure change is observed at the same time. During the detection of the spark plug, the air pump 2 is powered on and turned on to generate airflow inside the air pump 2. The airflow is discharged to the inside of the exhaust pipe 21 through the air pump 2, and then the heating wire 22 is turned on to increase the heat on the surface of the heating wire 22. The heating temperature of the heating wire 22 is controlled, and the heat is simultaneously transferred to the surface of the exhaust pipe 21, so that the heat inside the exhaust pipe 21 is rapidly heated, and the hot air flows through the multiple exhaust holes 2. 3 is discharged into the protection box 84. When testing spark plugs of different sizes, corresponding threaded seats 3 are set according to the spark plugs of different sizes, and the threaded seats 3 are installed in the test interface 83. Then, the corresponding spark plugs are installed in the connection seat 31. A certain pressure of gas is applied to the inside of the spark plug through the threaded seat 3 and the middle of the connection seat 31. Appropriate lubricating oil is added to one end of the oil inlet pipe 41. The lubricating oil enters the cavity 4 through the oil inlet pipe 41. When the spark plug is installed in the middle of the connection seat 31, the lubricating oil flows out of the connection seat 31 through the oil outlet hole 42. The lubricating oil flows out from the inner wall of the connecting seat 31, so that a layer of lubricating oil adheres to the surface of the spark plug when it contacts the inner wall of the connecting seat 31; when the spark plug rotates into the interior of the connecting seat 31, the surface thread is cleaned by the end of the bristle 51, so that the cleaned spark plug enters the interior of the connecting seat 31 for inspection; when the spark plug is fixed by two clamping plates 16, the spark plug first contacts the rubber pad 6, and the rubber pad 6 is fitted with the surface of the spark plug through the flexible setting; when the protective door 85 is closed, the protective door 85 and the protective box 84 are sealed by the sealing strip 7.

[0033] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A pre-combustion chamber spark plug airtightness test device, comprising a detector (8); characterized in that: The detector (8) is provided with a base (81) on the side wall; a protective box (84) is fixedly connected to the top of the base (81); a fixing plate (82) is fixedly connected to the middle of the protective box (84); the fixing plate (82) is fixedly connected to the inside of the protective box (84); a test interface (83) is fixedly connected to the middle of the fixing plate (82); a protective door (85) is hingedly connected to the side wall of the protective box (84); a fixing groove (1) is provided on the top of the base (81); an electric push rod (10) is fixedly connected to the bottom of the fixing groove (1); the electric push rod (10) outputs The end of the motor (11) is fixedly connected to a motor (11); the output end of the motor (11) is fixedly connected to a support plate (12); the top of the support plate (12) is fixedly connected to two fixing rods (13); the two fixing rods (13) are arranged opposite to each other; the side wall of the fixing rod (13) is fixedly connected to a telescopic rod (14); the side wall of the fixing rod (13) is fixedly connected to a spring (15); the spring (15) is fixedly connected to the outside of the telescopic rod (14); the ends of the telescopic rod (14) and the spring (15) are fixedly connected to a clamping plate (16); the clamping plate (16) is arranged in an arc shape.

2. A pre-combustion chamber spark plug airtightness test device according to claim 1, characterized in that: The top of the protection box (84) is fixedly connected to an air pump (2); the side wall of the air pump (2) is fixedly connected to an exhaust pipe (21); the middle of the exhaust pipe (21) passes through the top of the protection box (84); the middle of the exhaust pipe (21) is fixedly connected to two sides of the protection box (84); the middle of the exhaust pipe (21) is fixedly connected to two heating wires (22); the middle of the exhaust pipe (21) is fixedly connected to multiple groups of exhaust holes (23); the multiple groups of exhaust holes (23) are arranged in opposition.

3. A pre-combustion chamber spark plug airtightness test device according to claim 2, characterized in that: The middle part of the test interface (83) is threadedly connected to a threaded seat (3); the middle part of the threaded seat (3) is hollow; and the end of the threaded seat (3) is fixedly connected to a connecting seat (31).

4. A pre-combustion chamber spark plug airtightness test device according to claim 3, characterized in that: A cavity (4) is provided in the middle of the connection seat (31); the cavity (4) is provided near the top of the connection seat (31); an oil inlet pipe (41) is fixedly connected to the top of the connection seat (31); and a plurality of groups of oil outlet holes (42) are provided at the bottom of the cavity (4).

5. A pre-combustion chamber spark plug airtightness test device according to claim 4, characterized in that: A connecting rod (5) is fixedly connected to the bottom of the connecting seat (31); a plurality of groups of bristles (51) are fixedly connected to the middle of the connecting rod (5); and the ends of the plurality of groups of bristles (51) are arranged inwardly.

6. A pre-combustion chamber spark plug airtightness test device according to claim 5, characterized in that: A rubber pad (6) is installed in the middle of the clamping plate (16); the rubber pad (6) is fixed to the middle of the clamping plate (16).

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