Integrated engine cylinder cover airtightness detection device

Abstract

The utility model relates to the technical field of air tightness detection, and discloses an integrated engine cylinder cover air tightness detection device, which comprises a machine body, the top of the machine body is fixedly connected with a controller, the inside of the machine body is fixedly connected with a bottom plate, the inside of the machine body is fixedly connected with a sliding rod, and the outside of the sliding rod is slidably connected with a top plate. A sealing mechanism is arranged outside the bottom plate, a pressurizing mechanism is arranged at the bottom of the controller, the sealing mechanism comprises a bottom die and a top die, the outside of the bottom die is slidably connected to the inside of the bottom plate, a sealing groove is formed in the top of the bottom die, a main hole is formed in the bottom of the bottom die, and an auxiliary hole is formed in the bottom of the bottom die. According to the utility model, the sealing groove at the top of the bottom die drives the detection assembly to form a sealed space, and gas leakage is prevented, so that different channels and chambers of the cylinder cover are divided into a plurality of independent measurement areas, and air tightness detection is accurately carried out.

Description

An integrated engine cylinder cover airtightness testing device Technical Field

[0001] This utility model relates to the field of airtightness testing technology, and in particular to an integrated engine cylinder cover airtightness testing device. Background Technology

[0002] As a crucial component of the engine, the airtightness of the cylinder head directly affects the engine's performance and reliability. Currently, with the continuous development of engine technology, the requirements for the airtightness of the cylinder head are becoming increasingly stringent.

[0003] A search revealed Chinese patent publication number CN214471615U, which discloses an airtightness testing device for an engine cylinder head cover. The device includes a support plate with two limiting posts fixedly connected to its upper surface. An engine cylinder head cover is positioned between the two limiting posts. The bottom of the engine cylinder head cover has two through holes, each containing a front limiting rod and a rear limiting rod. Both the front and rear limiting rods have airflow channels, and an airbag is fixedly connected to the outlet of each airflow channel. A fixing plate is located on the upper side of the support plate, and a sealing cap is fixedly connected to the lower surface of the fixing plate. In this invention, the engine cylinder head cover is sealed using an airbag and a sealing ring, preventing gas from escaping from the top or through the holes during airtightness testing.

[0004] The aforementioned patent specification mentions that "by sealing the engine cylinder head cover with an airbag and a sealing ring, it is possible to prevent gas inside the cover from escaping from the top or through the holes during the sealing test of the engine cylinder head cover." The above content can perform sealing tests on the engine cylinder head cover. However, when used in the development of integrated anti-fatigue engine cylinder head covers, it cannot meet the requirement of individually testing various functional cavities. Therefore, an integrated engine cylinder head cover airtightness testing device is proposed to solve the above problems. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides an integrated engine cylinder head airtightness testing device, which aims to improve the problem that some existing devices cannot measure different channels and chambers of the cylinder head separately, making it difficult to accurately test the airtightness.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An integrated engine cylinder cover airtightness testing device includes a body, a controller fixedly connected to the top of the body, a base plate fixedly connected to the inside of the body, a slide rod fixedly connected to the inside of the body, a top plate slidably connected to the outside of the slide rod, a density measuring mechanism disposed on the outside of the base plate, and a pressurizing mechanism disposed at the bottom of the controller. The density measuring mechanism includes a bottom mold and a top mold. The bottom mold is slidably connected to the inside of the base plate. A sealing groove is formed on the top of the bottom mold, a main hole is formed on the bottom of the bottom mold, and a secondary hole is formed on the bottom of the bottom mold. The top mold is slidably connected to the inside of the top plate. A slot is formed on the bottom of the top mold, a main measuring hole is formed on the bottom of the top mold, and a secondary measuring hole is formed on the bottom of the top mold. A testing component is snapped onto the top of the bottom mold, and a locking component is rotatably connected to the outside of the base plate.

[0008] The above technical solution works as follows: Before the test begins, the bottom mold is located on the bottom plate and the top mold is located on the top plate. The test component is snapped onto the top of the bottom mold. After the controller is activated, it controls the pressurization mechanism to work. At the same time, the top plate slides down along the slide rod to make the top mold fit with the bottom mold. The slot at the bottom of the top mold matches the top of the bottom mold. The pressurization mechanism pressurizes the test component by filling it with air through the main hole and the auxiliary hole. After the gas is full, the controller detects the change in air pressure inside the test component through the main test hole and the auxiliary test hole to determine the airtightness of the engine cylinder cover. After the test is completed, the top plate moves up, the device is opened and the test component is taken out. The component is locked to ensure that the bottom mold is fixed in position during the test.

[0009] As a further description of the above technical solution:

[0010] The pressurizing mechanism includes a hydraulic rod, the top of which is fixedly connected to the bottom of the controller, the output end of which is fixedly connected to the top of the top plate, a plurality of telescopic rods fixedly connected to the top of the top plate, a plurality of pressure gauges installed on the top of the top plate, a compressor installed inside the machine body, and the other ends of the plurality of telescopic rods fixedly connected to the bottom of the controller.

[0011] The above technical solution involves the controller activating the hydraulic rod to drive the top plate to move down along the sliding rod. The telescopic rod extends and retracts synchronously to assist the top plate in moving smoothly. After the top plate drives the top mold to fit with the bottom mold, the compressor inflates the detection component through the main hole and other channels. The air tightness tester detects the air pressure change in real time to determine the air tightness.

[0012] As a further description of the above technical solution:

[0013] The detection assembly includes an outer cylinder cover, the bottom of which is snapped into the top of the bottom mold. A main air port is opened on the outside of the outer cylinder cover, and multiple functional ports are opened on the outside of the outer cylinder cover.

[0014] The above technical solution involves attaching the cylinder outer cover to the top of the bottom mold, and the controller starting the hydraulic rod to move the top plate down so that the top mold fits into the bottom mold. Then, the compressor fills the cylinder outer cover with air through the main hole and other channels, and the main air port and functional port. The pressure gauge detects the change in air pressure.

[0015] As a further description of the above technical solution:

[0016] The bottom of the cylinder outer cover is engaged with the inside of the sealing groove, and the top of the cylinder outer cover is engaged with the inside of the groove.

[0017] The above technical solution involves first inserting the bottom of the cylinder outer cover into the sealing groove of the bottom mold, then the controller activates the hydraulic rod to move the top plate down, which in turn moves the top mold to insert the top of the cylinder outer cover into the slot. Next, the compressor fills the cylinder with air through the channel, main air port, and functional port, and the pressure gauge detects the change in air pressure.

[0018] As a further description of the above technical solution:

[0019] The outside of the main air inlet is vertically connected to the main hole, and the outside of the main measuring hole is snapped into the top inner side of the main air inlet.

[0020] The above technical solution involves first inserting the bottom of the cylinder outer cover into the bottom mold sealing groove, and then inserting the main measuring hole into the inner side of the top of the main air port.

[0021] As a further description of the above technical solution:

[0022] The bottom inner side of the functional port is snapped onto the outside of the auxiliary hole, and the outside of the auxiliary measuring hole is snapped onto the top inner side of the cylinder outer cover.

[0023] The above technical solution involves inserting the main test hole and the auxiliary test hole into the main air port and the inner side of the top of the cylinder cover, respectively, and connecting the functional port to the auxiliary hole.

[0024] As a further description of the above technical solution:

[0025] The locking assembly includes a rotating rod, which is rotatably connected to the outside of the base plate. The rotating rod is slidably connected to a stop, and an adjusting nut is threaded onto the outside of the rotating rod.

[0026] The above technical solution allows for the following adjustment: When adjustment is required, the rotating rod is rotated. Since the abutment is slidably connected to the rotating rod, the abutment will move along its axial direction as the rotating rod rotates. At the same time, the adjusting nut is rotated. Since it is threadedly connected to the rotating rod, the adjusting nut will move on the rotating rod to achieve adjustment.

[0027] As a further description of the above technical solution:

[0028] The bottom of the abutment is supported on the top of the base plate, and the bottom of the adjusting nut is supported on the top of the abutment;

[0029] The above technical solution involves rotating the adjusting nut, whose bottom is supported on the top of the abutment. The adjusting nut will move on the rotating rod, thereby affecting the position of the abutment.

[0030] This utility model has the following beneficial effects:

[0031] 1. In this utility model, the sliding of the top mold in the top plate drives the slot to cooperate with the detection component, thereby clamping and fixing the detection component. The sealing groove at the top of the bottom mold drives the formation of a sealed space with the detection component to prevent gas leakage. The main hole and secondary hole of the bottom mold are used to drive gas flow, and the main measuring hole and secondary measuring hole of the top mold are used for detection. This allows the cylinder head to be divided into multiple separate measurement areas for accurate air tightness testing.

[0032] 2. In this utility model, the top plate is controlled to slide along the slide bar under the drive of the hydraulic rod, thereby realizing the pressurization action of the detection component. With the cooperation of the telescopic rod, the stability of the top plate is maintained, avoiding detection errors caused by shaking or tilting. This makes the air tightness detection of the new cylinder head cover efficient, accurate and stable, so as to solve the problems of insufficient detection accuracy, poor stability and inability to meet the diverse design detection needs of the new cylinder head cover by traditional air tightness detection equipment. Attached Figure Description

[0033] Figure 1 is a three-dimensional schematic diagram of an integrated engine cylinder cover airtightness testing device proposed in this utility model;

[0034] Figure 2 is a schematic diagram of the detection component of an integrated engine cylinder cover airtightness detection device proposed in this utility model.

[0035] Figure 3 is a schematic diagram of the top plate of an integrated engine cylinder cover airtightness testing device proposed in this utility model.

[0036] Figure 4 is an enlarged view of point A in Figure 3;

[0037] Figure 5 is a schematic diagram of the top mold of an integrated engine cylinder cover airtightness testing device proposed in this utility model.

[0038] Legend:

[0039] 1. Body; 2. Controller; 3. Base plate; 4. Slide rod; 5. Top plate; 6. Measuring mechanism; 61. Bottom mold; 62. Sealing groove; 63. Main hole; 64. Secondary hole; 65. Top mold; 66. Slot; 67. Main measuring hole; 68. Secondary measuring hole; 7. Detection assembly; 71. Cylinder outer cover; 72. Main air port; 73. Function port; 8. Locking assembly; 81. Rotary groove rod; 82. Abutment; 83. Adjusting nut; 9. Pressurization mechanism; 91. Hydraulic rod; 92. Telescopic rod; 93. Measuring device; 94. Compressor. Detailed Implementation

[0040] 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.

[0041] Referring to Figures 1, 3, and 5, this utility model provides an embodiment of an integrated engine cylinder head cover airtightness testing device, comprising a body 1. The body 1 provides a carrier for installation and fixation. In the research and development of integrated anti-fatigue engine cylinder head covers, it needs to meet the requirements of equipment stability and environmental adaptability for different stages of research and development testing, providing a reliable hardware platform for the airtightness testing of the new cylinder head cover. A controller 2 is fixedly connected to the top of the body 1. The controller 2, as the core control unit of the testing device, is responsible for receiving, processing, and sending various control signals, accurately controlling the entire testing process, coordinating the work between various components, ensuring that the testing work is carried out according to the predetermined procedure, and being able to perform different test parameters set by the researchers, such as pressure change gradients and testing time sequences. The testing process is flexibly adjusted to simulate the complex operating conditions of the engine in actual operation, so as to obtain more comprehensive and accurate air tightness data. The base plate 3 is fixedly connected inside the body 1. The base plate 3 provides a stable support platform to ensure that these components can work normally during the testing process. The slide rod 4 is fixedly connected inside the body 1. The slide rod 4 provides a sliding track for the top plate 5, so that the top plate 5 can move up and down inside the body 1. This can ensure that the new cylinder head cover can be clamped and tested quickly and accurately at different R&D stages, thereby improving R&D efficiency. The top plate 5 is slidably connected to the outside of the slide rod 4. The top plate 5 is used to install the air tightness measuring mechanism 6. Under the drive of the pressurizing mechanism 9, the clamping and testing operation of the testing component 7 is realized. The air tightness measuring mechanism 6 is set on the outside of the base plate 3, and the pressurizing mechanism 9 is set on the bottom of the controller 2.

[0042] Specifically, the body 1 acts as the overall frame, with the controller 2 fixed on its top. The controller 2 regulates the detection process. Inside the body 1, the base plate 3 and the slide rod 4 are fixedly installed. The base plate 3 serves as the mounting base for the airtightness testing mechanism 6, while the slide rod 4 is slidably connected to the top plate 5, providing a track for the up-and-down movement of the top plate 5. Driven by the pressurizing mechanism 9, the top plate 5 moves along the slide rod 4. The airtightness testing mechanism 6 is located outside the base plate 3 and is used to cooperate with the detection component 7 to complete the airtightness testing operation. The pressurizing mechanism 9 is installed at the bottom of the controller 2 to provide power for the movement of the top plate 5.

[0043] The air tightness testing mechanism 6 includes a bottom mold 61 and a top mold 65. The bottom mold 61 is externally slidably connected to the inside of the base plate 3. The bottom mold 61 is used to place the testing component 7. In the development of integrated anti-fatigue engine cylinder head cover, the design of the bottom mold 61 needs to match the structural characteristics of the new cylinder head cover to ensure a good sealing effect and accurately simulate the sealing state during actual engine operation. A sealing groove 62 is provided on the top of the bottom mold 61. The function of the sealing groove 62 is to form a sealed space between the bottom mold 61 and the testing component 7 to prevent gas leakage during the testing process and ensure the accuracy of the air tightness test. A sealing groove 62 is provided on the bottom of the bottom mold 61. The bottom mold 61 has a main hole 63 and a secondary hole 64 at its bottom. The main hole 63 and the secondary hole 64 are channels for gas flow. The top mold 65 is externally slidably connected to the inside of the top plate 5. The top mold 65 cooperates with the bottom mold 61 to clamp the detection component 7. The bottom of the top mold 65 has a slot 66 for further fixing the detection component 7. The bottom of the top mold 65 has a main test hole 67 and a secondary test hole 68 at its bottom. The main test hole 67 and the secondary test hole 68 are used to test the airtightness of the detection component 7. The top of the bottom mold 61 is clamped to the detection component 7. The bottom plate 3 is externally rotatably connected to a locking component 8.

[0044] Specifically, in the airtightness testing mechanism 6, the bottom mold 61 is slidably connected to the inside of the base plate 3, serving as the basis for placing the testing component 7. The sealing groove 62 on its top can cooperate with the testing component 7 to form a sealed space. The main hole 63 and the secondary hole 64 at the bottom provide channels for gas flow. The top mold 65 is slidably connected to the inside of the top plate 5, working in conjunction with the bottom mold 61 to clamp the testing component 7. The slot 66 at its bottom can further fix the testing component 7. The main testing hole 67 and the secondary testing hole 68 are used to connect the air passage of the testing component 7 for airtightness testing. In addition, the testing component 7 is snapped onto the top of the bottom mold 61, while the locking component 8 is rotatably connected to the outside of the base plate 3. Through its own structural changes, the bottom mold 61 can be fixed or unlocked, ensuring the stability of the bottom mold 61 during the testing process and ensuring that all components of the airtightness testing mechanism 6 cooperate to complete the airtightness testing operation of the testing component 7.

[0045] Referring to Figures 2, 4, and 5, the testing component 7 includes a cylinder cover 71, which is the object to be tested. In the development of integrated anti-fatigue engine cylinder head cover, the cylinder cover 71 serves as the prototype of the new product. Its airtightness test results are directly related to the performance and reliability of the product and are a key testing link in the development process. The bottom of the cylinder cover 71 is snapped into the top of the bottom mold 61. The cylinder cover 71 has a main air port 72 on its outside, which is the main chamber. The cylinder cover 71 has multiple functional ports 73 on its outside, which are chambers with different functions. The bottom of the cylinder cover 71 is snapped into the inside of the sealing groove 62, and the top of the cylinder cover 71 is snapped into the inside of the slot 66. The outside of the main air port 72 is vertically connected to the main hole 63. The outside of the main test hole 67 is snapped into the top inner side of the main air port 72. The bottom inner side of the functional port 73 is snapped into the outside of the secondary hole 64, and the outside of the secondary test hole 68 is snapped into the top inner side of the cylinder cover 71.

[0046] Specifically, the cylinder outer cover 71 in the detection component 7 is the object to be tested. Its bottom is snapped into the sealing groove 62 on the top of the bottom mold 61, and its top is snapped into the groove 66 on the bottom of the top mold 65 to achieve fixation. The main air port 72 on the outside of the cylinder outer cover 71 is vertically connected to the main hole 63 on the bottom of the bottom mold 61. At the same time, the main test hole 67 is snapped into the inner side of the top of the main air port 72 to form the main channel for gas in and out. The inner side of the bottom of the multiple functional ports 73 on the outside of the cylinder outer cover is snapped into the secondary holes 64 of the bottom mold 61, and the secondary test hole 68 is snapped into the inner side of the top of the cylinder outer cover 71 to form the gas flow path of different functional chambers. Through the precise docking of these structures, the cylinder outer cover 71 is tightly connected to the air tightness testing mechanism 6, and a complete gas path system is built for air tightness testing.

[0047] The locking assembly 8 includes a rotating rod 81. The rotating rod 81 drives the abutment 82 to move through its own rotation, thereby locking and unlocking the bottom mold 61. The rotating rod 81 is externally rotatably connected to the outside of the base plate 3. The abutment 82 is slidably connected to the rotating rod 81. The abutment 82 applies pressure to the bottom mold 61 under the drive of the rotating rod 81. An adjusting nut 83 is threadedly connected to the outside of the rotating rod 81. The adjusting nut 83 is used to adjust the position of the abutment 82. Through the threaded connection with the rotating rod 81, the pressure of the abutment 82 on the bottom mold 61 is controlled to adapt to different specifications of bottom molds 61 and inspection requirements. The bottom of the abutment 82 is supported on the top of the base plate 3, and the bottom of the adjusting nut 83 is supported on the top of the abutment 82.

[0048] Specifically, in the locking assembly 8, the rotating groove rod 81 is externally rotatably connected to the outside of the base plate 3, and its surface slides with the abutment 82. It is also threadedly connected to the adjusting nut 83. During operation, rotating the rotating groove rod 81 causes the abutment 82 to move along the rotating groove rod 81 due to its sliding relationship with the rotating groove rod 81. Its bottom is supported on the top of the base plate 3. During the movement, it applies pressure to the bottom mold 61. The adjusting nut 83 can adjust its position on the rotating groove rod 81 through the threaded transmission with the rotating groove rod 81. Since the bottom of the adjusting nut 83 is supported on the top of the abutment 82, the moving distance of the abutment 82 and the pressure on the bottom mold 61 can be controlled, thereby locking or unlocking the bottom mold 61 to adapt to the fixing requirements of different specifications of bottom molds 61 and inspection scenarios.

[0049] Referring to Figures 2 and 3, the pressurizing mechanism 9 includes a hydraulic rod 91, which is the power component that pushes the top plate 5 up and down. Through its telescopic movement, it drives the top plate 5. The top of the hydraulic rod 91 is fixedly connected to the bottom of the controller 2, and the output end of the hydraulic rod 91 is fixedly connected to the top of the top plate 5. Multiple telescopic rods 92 are fixedly connected to the top of the top plate 5. The telescopic rods 92 serve to assist in supporting and stabilizing the top plate 5, ensuring its stability during up and down movement, preventing it from shaking or tilting, and ensuring the accuracy of the detection work. Multiple pressure gauges are installed on the top of the top plate 5. 93, the leak detector 93 is used to detect parameters such as pressure and flow rate of gas in the gas path of the detection component 7. By analyzing these parameters, the air tightness of the detection component 7 is judged. It is a key component for realizing air tightness detection. The leak detector 93 has the characteristics of high precision and high sensitivity, and can detect small gas leaks and parameter changes to meet the strict requirements of air tightness detection for the new cylinder head cover at different design stages. The compressor 94 is installed inside the body 1. The compressor 94 provides a gas pressure source for the entire air tightness detection process. The other end of the multiple telescopic rods 92 is fixedly connected to the bottom of the controller 2.

[0050] Specifically, in the pressurization mechanism 9, the top of the hydraulic rod 91 is fixed to the bottom of the controller 2, and the output end is connected to the top of the top plate 5, serving as the power source for the up-and-down movement of the top plate 5. Through telescopic movement, the top plate 5 is driven to slide along the slide rod 4. Multiple telescopic rods 92 are fixedly connected to the top of the top plate 5, and their other ends are connected to the bottom of the controller 2. During the movement of the top plate 5, the telescopic rods 92 assist in supporting the top plate 5 through telescopic deformation to maintain its stability. At the same time, the pressure gauge 93 installed on the top of the top plate 5 is connected to the gas path of the detection component 7 through the main test hole 67 and the auxiliary test hole 68, and is used to monitor the gas pressure and flow parameters in the gas path. The compressor 94 installed inside the body 1 compresses the gas and delivers it to the detection component 7 through the main hole 63 and the auxiliary hole 64, providing pressurized gas for the airtightness test. All components work together to complete the pressurization and airtightness test operation of the detection component 7.

[0051] Working principle: The cylinder outer cover 71 to be tested is placed in the sealing groove 62 on the top of the bottom mold 61. At this time, the main air port 72 of the cylinder outer cover 71 is vertically connected to the main hole 63 of the bottom mold 61, and the functional port 73 is correspondingly connected to the secondary hole 64. Then, the rotating groove rod 81 is rotated, which drives the abutment 82 to move on the rotating groove rod 81. The position of the abutment 82 is adjusted by adjusting the nut 83, so that the abutment 82 applies pressure to the bottom mold 61, and the bottom mold 61 is firmly pressed against the base plate 3, thus completing the fixation of the bottom mold 61 and the cylinder outer cover 71.

[0052] The controller 2 sends a control signal to the hydraulic rod 91, and the hydraulic system inside the hydraulic rod 91 works, with its output end extending downward. The hydraulic rod 91 pushes the top plate 5 to move downward along the slide bar 4. The top plate 5 drives the top mold 65 and the pressure gauge 93 installed on it to move downward together. When the top mold 65 contacts the cylinder outer cover 71, the slot 66 at the bottom of the top mold 65 engages with the top of the cylinder outer cover 71, the main measuring hole 67 engages with the inner side of the top of the main air port 72, and the auxiliary measuring hole 68 engages with the inner side of the top of the cylinder outer cover 71, thereby clamping the cylinder outer cover 71. At the same time, the pressure gauge 93 is connected to the air passage of the cylinder outer cover 71. During the movement of the top plate 5, one end of the telescopic rod 92 is fixed to the top plate 5, and the other end is fixed to the bottom of the controller 2. It adapts to the displacement of the top plate 5 through its own telescopic deformation, applies a supporting force to the top plate 5, and keeps it stable.

[0053] The compressor 94, driven by an electric motor, draws in and compresses air or other detection gas. The compressed gas is then transported through a pipeline to the main port 63 of the leak detection mechanism 6. The gas enters the main air port 72 of the cylinder outer cover 71 through the main port 63. After flowing inside the cylinder outer cover 71, the compressed gas is then transported through a pipeline to the functional port 73 via the auxiliary port 64. The leak detector 93 monitors parameters such as gas pressure and flow rate in the gas path in real time through the main test port 67 and the auxiliary test port 68, and transmits the collected data to the controller 2. The controller 2 analyzes and processes the data according to preset standards and algorithms to determine whether there is a leak in the cylinder outer cover 71 and the degree of leakage.

[0054] After the test is completed, the controller 2 sends a signal to the hydraulic rod 91, the output end of the hydraulic rod 91 retracts upward, and pulls the top plate 5 to move upward along the slide rod 4. The top mold 65 moves away from the bottom mold 61. The operator rotates the rotating rod 81 in the opposite direction to reduce the pressure of the seat 82 on the bottom mold 61. The bottom mold 61 is unlocked, and the cylinder cover 71 that has been tested is taken out, completing one test process.

[0055] 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. An integrated engine cylinder cover airtightness testing device, comprising a body (1), characterized in that: A controller (2) is fixedly connected to the top of the body (1), a base plate (3) is fixedly connected to the inside of the body (1), a slide rod (4) is fixedly connected to the inside of the body (1), a top plate (5) is slidably connected to the outside of the slide rod (4), a density measuring mechanism (6) is provided on the outside of the base plate (3), and a pressure mechanism (9) is provided at the bottom of the controller (2); the density measuring mechanism (6) includes a bottom mold (61) and a top mold (65), the outside of the bottom mold (61) is slidably connected to the inside of the base plate (3), and the top of the bottom mold (61) is slidably connected to the inside of the base plate (3). The bottom mold (61) has a sealing groove (62), a main hole (63) at the bottom, a secondary hole (64) at the bottom, a sliding connection between the top mold (65) and the inside of the top plate (5), a slot (66) at the bottom, a main measuring hole (67) at the bottom, a secondary measuring hole (68) at the bottom, a detection component (7) at the top of the bottom mold (61), and a locking component (8) rotatably connected to the outside of the bottom plate (3).

2. The integrated engine cylinder cover airtightness testing device according to claim 1, characterized in that: The pressurizing mechanism (9) includes a hydraulic rod (91), the top of which is fixedly connected to the bottom of the controller (2), the output end of which is fixedly connected to the top of the top plate (5), a plurality of telescopic rods (92) are fixedly connected to the top of the top plate (5), a plurality of pressure gauges (93) are installed on the top of the top plate (5), a compressor (94) is installed inside the body (1), and the other ends of the plurality of telescopic rods (92) are fixedly connected to the bottom of the controller (2).

3. The integrated engine cylinder cover airtightness testing device according to claim 1, characterized in that: The detection component (7) includes a cylinder cover (71), the bottom of which is snapped onto the top of the bottom mold (61), a main air port (72) is provided on the outside of the cylinder cover (71), and multiple functional ports (73) are provided on the outside of the cylinder cover (71).

4. The integrated engine cylinder cover airtightness testing device according to claim 3, characterized in that: The bottom of the cylinder cover (71) is engaged inside the sealing groove (62), and the top of the cylinder cover (71) is engaged inside the slot (66).

5. The integrated engine cylinder cover airtightness testing device according to claim 4, characterized in that: The outside of the main air inlet (72) is vertically connected to the main hole (63), and the outside of the main measuring hole (67) is snapped into the top inner side of the main air inlet (72).

6. The integrated engine cylinder cover airtightness testing device according to claim 5, characterized in that: The bottom inner side of the functional port (73) is engaged with the outside of the auxiliary hole (64), and the outside of the auxiliary measuring hole (68) is engaged with the top inner side of the cylinder outer cover (71).

7. The integrated engine cylinder cover airtightness testing device according to claim 1, characterized in that: The locking assembly (8) includes a rotating rod (81), which is rotatably connected to the outside of the base plate (3). The rotating rod (81) is slidably connected to a stop (82), and the rotating rod (81) is threadedly connected to an adjusting nut (83).

8. The integrated engine cylinder cover airtightness testing device according to claim 7, characterized in that: The bottom of the abutment (82) is supported on the top of the base plate (3), and the bottom of the adjusting nut (83) is supported on the top of the abutment (82).

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