An engine cylinder head sealing performance testing device

Abstract

This utility model discloses an engine cylinder head sealing performance testing device, relating to the field of cylinder head testing technology. It includes a testing platform, a water tank, an inflation mechanism, a fixed slide, a movable slide, a first clamping member, a second clamping member, a third clamping member, and a fourth clamping member. The water tank is located in the center of the top surface of the testing platform; water is placed in the water tank to test the sealing performance of the engine cylinder head placed inside. The movable slide is slidably connected to the testing platform in a direction close to or away from the fixed slide. The first and second clamping members are respectively located at both ends of the fixed slide, and can move closer or further away from each other while maintaining their moved positions. The first and second clamping members are respectively located at both ends of the movable slide, and the third and fourth clamping members can move closer or further away from each other while maintaining their moved positions. The device has a simple structure, is easy to use, and is effectively applicable to engine cylinder heads of various sizes.

Description

Technical Field

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

[0002] As a critical component of diesel engines with a complex structure and heavy load, the sealing performance of the engine cylinder head directly affects the overall performance and reliability of the engine. In the current industrial manufacturing and testing fields, the demand for accurate and efficient testing of engine cylinder head sealing performance is increasing. While existing testing equipment has made some progress in accuracy—for example, some devices reduce test data deviation by simulating specific temperature environments—many challenges remain in practical applications.

[0003] Size compatibility challenge: Most traditional testing equipment cannot effectively limit and fix engine cylinder heads of different sizes. This leads to the need for frequent equipment changes or manual adjustments when testing cylinder heads of diverse sizes, which seriously reduces testing efficiency, increases testing costs, and makes it difficult to guarantee positioning accuracy, affecting the accuracy of test results.

[0004] Lack of protective measures: The existing device lacks effective protection for the surface of the engine cylinder head during the testing process. During clamping and fixing, it is easy to cause scratches and damage due to hard contact. Especially for engine cylinder heads with high precision requirements, such damage may affect their normal performance and service life, creating hidden dangers for subsequent use.

[0005] In summary, there is an urgent need for a newly designed engine cylinder head sealing performance testing device to solve the aforementioned technical problems and meet the urgent industrial production demand for high-precision, highly adaptable, and highly reliable testing equipment. Utility Model Content

[0006] The purpose of this invention is to provide an engine cylinder head sealing performance testing device to solve the problems existing in the prior art. It has a simple structure, is easy to use, and is effectively applicable to engine cylinder heads of various sizes.

[0007] To achieve the above objectives, this utility model provides the following solution:

[0008] This utility model provides an engine cylinder head sealing performance testing device, comprising: a testing platform, a water tank, an inflation mechanism, a fixed slide, a movable slide, a first clamping member, a second clamping member, a third clamping member, and a fourth clamping member. The water tank is disposed in the middle of the top surface of the testing platform; and the water tank is used to hold water to test the sealing performance of the engine cylinder head placed in the water tank. The inflation mechanism is disposed at one end of the testing platform to inflate the spark plug orifice. The fixed slide is disposed on the testing platform and located between the water tank and the inflation mechanism. The movable slide is disposed on the testing platform and located on the side of the water tank away from the fixed slide. The movable slide is slidably connected to the detection platform in a direction close to or far from the fixed slide and can maintain the position after sliding; the first clamping member and the second clamping member are respectively disposed at both ends of the fixed slide, and the first clamping member and the second clamping member can move closer to or further away from each other and maintain the position after moving so as to clamp both ends of one side of the engine cylinder head; the first clamping member and the second clamping member are respectively disposed at both ends of the movable slide, and the third clamping member and the fourth clamping member can move closer to or further away from each other and maintain the position after moving so as to clamp both ends of the other side of the engine cylinder head.

[0009] Preferably, the assembly further includes a first motor, a first bidirectional lead screw, a first slider, and a second slider. The fixed slide includes a positioning groove. The first bidirectional lead screw is disposed in the positioning groove, and both ends of the first bidirectional lead screw are rotatably connected to the fixed slide. The first motor is fixedly connected to the fixed slide, and the output end of the first motor is fixedly connected to one end of the first bidirectional lead screw extending out of the fixed slide. The first slider and the second slider are respectively threaded to two sections of the first bidirectional lead screw with opposite directions of rotation. The first clamping member is fixedly connected to the first slider, and the second clamping member is fixedly connected to the second slider.

[0010] Preferably, the device further includes a second motor, a second bidirectional lead screw, a third slider, and a fourth slider. The second bidirectional lead screw is disposed on the movable slide, and both ends of the second bidirectional lead screw are rotatably connected to the movable slide. The second motor is fixedly connected to the movable slide, and the output shaft of the second motor is fixedly connected to the second bidirectional lead screw. The third slider and the fourth slider are respectively threaded to the two ends of the second bidirectional lead screw with opposite directions of rotation. The third clamping member is fixedly connected to the third slider, and the fourth clamping member is fixedly connected to the fourth slider.

[0011] Preferably, the device also includes an electric slide rail. The testing platform includes a slide groove, which is located on the side of the water tank away from the fixed slide seat. The electric slide rail is located in the slide groove, and the movable slide seat is mounted on the electric slide rail so that it can move closer to or further away from the fixed slide seat under the action of the electric slide rail and maintain the moved position.

[0012] Preferably, the first clamping member includes a first connecting rod and a first positioning block. One end of the first connecting rod is fixedly connected to the first slider, and the other end is fixedly connected to the first positioning block. The bottom end of the first positioning block extends into the water tank. The second clamping member includes a second connecting rod and a second positioning block. One end of the second connecting rod is fixedly connected to the second slider, and the other end is fixedly connected to the second positioning block. The bottom end of the second positioning block extends into the water tank. The third clamping member includes a third connecting rod and a third positioning block. One end of the third connecting rod is fixedly connected to the third slider, and the other end is fixedly connected to the third positioning block. The bottom end of the third positioning block extends into the water tank. The fourth clamping member includes a fourth connecting rod and a fourth positioning block. One end of the fourth connecting rod is fixedly connected to the fourth slider, and the other end is fixedly connected to the fourth positioning block. The bottom end of the fourth positioning block extends into the water tank.

[0013] Preferably, the first positioning block, the second positioning block, the third positioning block, and the fourth positioning block are all L-shaped structures.

[0014] Preferably, it also includes multiple rubber blocks, and the first positioning block, the second positioning block, the third positioning block and the fourth positioning block are each provided with multiple rubber blocks at the positions where they are in contact with the engine cylinder head.

[0015] Preferably, the inflation mechanism includes a fixed plate, an air pump, and an inflation pipe. The fixed plate is fixedly connected to the test bench, the air pump is fixedly connected to the fixed plate, one end of the inflation pipe is connected to and communicates with the output end of the air pump, and the other end is used to connect and communicate with the spark plug port to inflate the engine cylinder head.

[0016] The present invention achieves the following technical advantages over the prior art:

[0017] This invention provides an engine cylinder head sealing performance testing device. The movable slide can slide and maintain its position, better adapting to the placement adjustment of engine cylinder heads of different sizes, thus improving the device's versatility and flexibility. Four clamping members are respectively located at both ends of the fixed and movable slides, and can move closer or further apart to maintain their position. This design can firmly clamp both ends of the engine cylinder head, ensuring the stability of the cylinder head's position during testing, preventing shaking or displacement, thereby guaranteeing the accuracy of the sealing performance test. The clamping members in different positions work together to adapt to the clamping requirements of engine cylinder heads of various shapes and sizes, further improving the device's applicability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A three-dimensional structural diagram of the engine cylinder head sealing performance testing device provided by this utility model from one direction;

[0020] Figure 2 A three-dimensional structural diagram of the engine cylinder head sealing performance testing device provided by this utility model from another perspective;

[0021] Figure 3 A top view schematic diagram of the engine cylinder head sealing performance testing device provided by this utility model;

[0022] Figure 4 A schematic diagram showing the structural details of the first clamping component in the engine cylinder head sealing performance testing device provided by this utility model.

[0023] In the diagram: 1. Testing platform; 101. Slide groove; 102. Positioning groove; 2. Water tank; 3. Fixing plate; 301. Air pump; 302. Air inflator; 4. Electric slide rail; 401. Movable slide block; 5. First motor; 501. First double-acting lead screw; 502. First slider; 503. First connecting rod; 504. First positioning block; 6. Second motor; 601. Second double-acting lead screw; 602. Third slider; 7. Rubber block. Detailed Implementation

[0024] 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.

[0025] The purpose of this invention is to provide an engine cylinder head sealing performance testing device to solve the problems existing in the prior art. It has a simple structure, is easy to use, and is effectively applicable to engine cylinder heads of various sizes.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] This utility model provides a device for testing the sealing performance of an engine cylinder head, such as... Figures 1-4 As shown, the system includes: a testing platform 1, a water tank 2, an inflation mechanism, a fixed slide, a movable slide 401, a first clamping member, a second clamping member, a third clamping member, and a fourth clamping member. The water tank 2 is located in the middle of the top surface of the testing platform 1; and the water tank 2 is used to hold water to test the sealing performance of the engine cylinder head placed in the water tank 2. The inflation mechanism is located at one end of the testing platform 1 to inflate the spark plug openings. The fixed slide is located on the testing platform 1 and between the water tank 2 and the inflation mechanism. The movable slide 401 is located on the testing platform 1 and on the side of the water tank 2 away from the fixed slide. The movable slide 401 is slidably connected to the test bench 1 in the direction of approaching or moving away from the fixed slide and can maintain its slidable position. The first and second clamping members are respectively disposed at both ends of the fixed slide. The first and second clamping members can move closer or further away from each other and maintain their moved positions to clamp both ends of one side of the engine cylinder head. The first and second clamping members are respectively disposed at both ends of the movable slide 401. The third and fourth clamping members can move closer or further away from each other and maintain their moved positions to clamp both ends of the other side of the engine cylinder head. This layout design makes the test device compact and the positions of each component reasonable. The water tank 2 is located in the middle of the top surface of the test bench 1 to facilitate the placement of the engine cylinder head for sealing testing. The inflation mechanism is located at one end to facilitate inflation of the spark plug port. The fixed slide and the movable slide 401 are distributed on both sides of the water tank 2, providing a structural basis for the subsequent clamping and limiting of the engine cylinder head. The movable slide 401 can slide and maintain its position, which can better adapt to the placement adjustment of engine cylinder heads of different sizes and improve the versatility and flexibility of the device. Four clamping components are respectively positioned at both ends of the fixed slide and the movable slide 401, and can move closer or further apart to maintain their position. This design provides a stable clamping solution for both ends of the engine cylinder head, ensuring its stability during testing and preventing any shaking or displacement, thus guaranteeing the accuracy of the sealing performance test. The coordinated operation of the clamping components in different positions can adapt to the clamping requirements of engine cylinder heads of various shapes and sizes, further improving the applicability of the device.

[0028] In a preferred embodiment, the system further includes a first motor 5, a first bidirectional lead screw 501, a first slider 502, and a second slider. The fixed slide includes a positioning groove 102. The first bidirectional lead screw 501 is disposed in the positioning groove 102, and both ends of the first bidirectional lead screw 501 are rotatably connected to the fixed slide. The first motor 5 is fixedly connected to the fixed slide, and the output end of the first motor 5 is fixedly connected to one end of the first bidirectional lead screw 501 that extends out of the fixed slide. The first slider 502 and the second slider are respectively threaded to the two segments of the first bidirectional lead screw 501 with opposite rotation directions. The first clamping member is fixedly connected to the first slider 502, and the second clamping member is fixedly connected to the second slider. The first motor 5 drives the first bidirectional lead screw 501 to rotate, and the two segments of the lead screw with opposite rotation directions drive the first slider 502 and the second slider to move relative to each other, thereby causing the first clamping member and the second clamping member to move closer to or further away from each other. This structure enables precise control over the positions of the first and second clamping components. Compared to the traditional manual adjustment method, it is more accurate and efficient, and can quickly adapt to the clamping requirements of engine cylinder heads of different sizes, improving detection efficiency and clamping accuracy.

[0029] In a preferred embodiment, the system further includes a second motor 6, a second bidirectional lead screw 601, a third slider 602, and a fourth slider. The second bidirectional lead screw 601 is disposed on the movable slide 401, and both ends of the second bidirectional lead screw 601 are rotatably connected to the movable slide 401. The second motor 6 is fixedly connected to the movable slide 401, and the output shaft of the second motor 6 is fixedly connected to the second bidirectional lead screw 601. The third slider 602 and the fourth slider are respectively threaded to the two ends of the second bidirectional lead screw 601 with opposite directions of rotation. The third clamping member is fixedly connected to the third slider 602, and the fourth clamping member is fixedly connected to the fourth slider. Similar to the structure of the first motor 5 and the first bidirectional lead screw 501, the second motor 6 drives the second bidirectional lead screw 601 to move the third slider 602 and the fourth slider, thereby controlling the third clamping member and the fourth clamping member to move closer to or further away from each other. These two sets of structures work together to precisely clamp both ends of the engine cylinder head on the other side, further enhancing the adaptability to engine cylinder heads of different sizes and the stability and precision of clamping. This ensures that the engine cylinder head remains in a stable clamping state during the testing process, which helps improve the reliability of the test results.

[0030] In a preferred embodiment, the device further includes an electric slide rail 4. The testing platform 1 includes a slide groove 101, which is located on the side of the water tank 2 away from the fixed slide. The electric slide rail 4 is disposed within the slide groove 101. A movable slide 401 is mounted on the electric slide rail 4 so that it can move closer to or further away from the fixed slide under the action of the electric slide rail 4 and maintain its moved position. The electric slide rail 4 allows the fixed slide to move flexibly on the testing platform 1, further expanding the adaptability of the device to engine cylinder heads of different sizes. By electrically controlling the position of the movable slide 401, the operation is more convenient and accurate. The movable slide 401 can be quickly adjusted to a suitable position to cooperate with the fixed slide to achieve precise positioning of the engine cylinder head, improving the versatility and ease of operation of the device, while also enhancing the overall testing efficiency.

[0031] In a preferred embodiment, the first clamping member includes a first connecting rod 503 and a first positioning block 504. One end of the first connecting rod 503 is fixedly connected to the first slider 502, and the other end is fixedly connected to the first positioning block 504. The bottom end of the first positioning block 504 extends into the water tank 2. The second clamping member includes a second connecting rod and a second positioning block. One end of the second connecting rod is fixedly connected to the second slider, and the other end is fixedly connected to the second positioning block. The bottom end of the second positioning block extends into the water tank 2. The third clamping member includes a third connecting rod and a third positioning block. One end of the third connecting rod... One end of the fourth clamping member is fixedly connected to the third slider 602, and the other end is fixedly connected to the third positioning block. The bottom end of the third positioning block extends into the water tank 2. The fourth clamping member includes a fourth connecting rod and a fourth positioning block. One end of the fourth connecting rod is fixedly connected to the fourth slider, and the other end is fixedly connected to the fourth positioning block. The bottom end of the fourth positioning block extends into the water tank 2. The positioning block can accurately position and clamp the engine cylinder head, and the bottom end extending into the water tank 2 can more directly limit the engine cylinder head located in the water tank 2, ensuring the stability of the engine cylinder head during the inspection process. The connecting rod accurately transmits the movement of the slider to the positioning block, making the entire clamping action smoother and more reliable, which helps to improve the inspection accuracy.

[0032] In a preferred embodiment, the first positioning block 504, the second positioning block, the third positioning block, and the fourth positioning block are all L-shaped. The L-shaped positioning blocks can better conform to the shape of the engine cylinder head, increase the contact area with the engine cylinder head, and improve the stability and reliability of clamping. Compared with other shapes, the L-shaped structure is more stable when limiting the engine cylinder head, and can effectively prevent the engine cylinder head from shifting or shaking during the testing process, thereby ensuring the accuracy of the test results.

[0033] In a preferred embodiment, the system further includes multiple rubber blocks 7. The first positioning block 504, the second positioning block, the third positioning block, and the fourth positioning block all have multiple rubber blocks 7 at their contact points with the engine cylinder head. The rubber blocks 7 provide excellent protection, preventing surface scratches caused by hard contact between the positioning blocks and the engine cylinder head, thus protecting the appearance and performance of the engine cylinder head. Simultaneously, the rubber blocks 7 have a certain degree of elasticity, providing cushioning during clamping and further improving clamping stability. This prevents damage to the engine cylinder head due to excessive clamping force, ensuring that the testing process does not adversely affect the engine cylinder head itself.

[0034] In a preferred embodiment, the inflation mechanism includes a fixed plate 3, an inflation pump 301, and an inflation pipe 302. The fixed plate 3 is fixedly connected to the test bench, and the inflation pump 301 is fixedly connected to the fixed plate 3. One end of the inflation pipe 302 is connected to and communicates with the output end of the inflation pump 301, and the other end is used to connect and communicate with the spark plug port to inflate the engine cylinder head. The fixed plate 3 provides a stable mounting base for the inflation pump 301, ensuring that the inflation pump 301 will not shake or shift during operation, thus guaranteeing the stability and accuracy of inflation. The inflation pipe 302 connects the inflation pump 301 and the spark plug port, enabling accurate delivery of the gas generated by the inflation pump 301 into the engine cylinder head, thereby enabling the testing of the engine cylinder head sealing performance. This structural design makes the inflation process more reliable and efficient, and helps to obtain accurate test data.

[0035] The method of using the engine cylinder head sealing performance testing device provided by this invention is as follows:

[0036] Test preparation

[0037] Check that all components of the testing device are securely connected, including the testing platform 1, the fixed slide, the movable slide 401, the inflation mechanism, etc., and ensure that there is no looseness.

[0038] Check whether the electrical system is normal, such as whether the power supply lines of the first motor 5, the second motor 6, and the electric slide rail 4 are connected correctly, and whether the motor driver parameters are set correctly to ensure that the equipment can be powered on and run normally.

[0039] Fill water tank 2 with water to the height that completely submerges the cylinder head of the engine to be tested, in order to meet the conditions for sealing performance testing.

[0040] Placement of engine cylinder head

[0041] Place the engine cylinder head to be tested into water tank 2.

[0042] Input the relevant dimensions (length, width, height, etc.) of the engine cylinder head through the control system interface (if available) so that the system can automatically calculate the motion parameters of subsequent components to achieve precise positioning of the cylinder head; if there is no control system interface, manually adjust the positions of relevant components based on experience.

[0043] Adjust the position of the clamping parts to limit the movement.

[0044] Fixed slide side clamping adjustment: Start the first motor 5, the first motor 5 drives the first bidirectional lead screw 501 to rotate. Since the first slider 502 and the second slider are respectively threaded to the two sections of the first bidirectional lead screw 501 with opposite rotation directions, the rotation of the lead screw drives the first slider 502 and the second slider to move relative to each other, so that the first clamping member fixedly connected to the first slider 502 and the second clamping member fixedly connected to the second slider move closer or further away from each other until the two ends on one side of the engine cylinder head are firmly clamped.

[0045] Adjustment of the position of the movable slide 401 (if required): Start the electric slide rail 4. If the cylinder head to be tested has a special size, the electric slide rail 4 will drive the movable slide 401 mounted on it to move closer to or further away from the movable slide 401 on the test bench 1. After adjusting to a suitable position, stop to cooperate with the fixed slide to complete a better limit on the engine cylinder head.

[0046] Side clamping adjustment of movable slide block 401: Start the second motor 6, the second motor 6 drives the second bidirectional lead screw 601 to rotate, which drives the third slider 602 and the fourth slider, which are threaded to the second bidirectional lead screw 601, to move relative to each other, thereby making the third clamping member fixedly connected to the third slider 602 and the fourth clamping member fixedly connected to the fourth slider move closer or further away from each other, so as to achieve a stable clamping of both ends on the other side of the engine cylinder head.

[0047] Inflation test

[0048] Connect one end of the air inlet pipe 302 to the output end of the air pump 301 and ensure good connection. Connect the other end accurately to the spark plug hole on the engine cylinder head and ensure connection.

[0049] Start the air pump 301. The air pump 301 will charge the spark plugs with air according to preset parameters (determined based on the actual working pressure range of the engine cylinder head). At the same time, observe the condition of the engine cylinder head surface in the water tank 2.

[0050] By observing the location, number, and size of bubbles emerging from the surface of the engine cylinder head in water tank 2, the sealing performance of the engine cylinder head can be determined. If bubbles continuously emerge from a certain location, it indicates that the sealing performance at that location is poor.

[0051] End of test and reset

[0052] After the test is completed, first turn off the air pump 301 to stop the inflation, then turn off the external water pipe (if there is automatic control) to stop the water from flowing.

[0053] Remove the air inlet pipe 302 that is connected to the spark plug port on the engine cylinder head.

[0054] Remove the engine cylinder head after inspection.

[0055] A reset command (if applicable) can be sent through the control system interface, or the relevant components can be manually operated. The electric slide rail 4 drives the slide block 401 back to its initial position, and the first motor 5 and the second motor 6 drive their respective connected bidirectional lead screws to reverse, so that the displacement block and the positioning block return to their initial state, preparing for the next test.

[0056] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An engine cylinder head sealing performance testing device, characterized in that: include: Testing station A water tank is disposed in the middle of the top surface of the test platform; and the water tank is used to hold water to test the sealing performance of the engine cylinder head placed in the water tank. An inflation mechanism is provided at one end of the test bench to inflate the spark plug opening; A fixed slide is disposed on the testing platform and located between the water tank and the inflation mechanism; A movable slide is disposed on the detection platform and located on the side of the water tank away from the fixed slide. The movable slide is slidably connected to the detection platform in a direction close to or away from the fixed slide and can maintain the position after sliding. First clamping component, The second clamping member, the first clamping member and the second clamping member are respectively disposed at both ends of the fixed slide, the first clamping member and the second clamping member can move closer or further away from each other and maintain the position after movement, so as to clamp both ends of one side of the engine cylinder head; Third clamping component, The fourth clamping member, the first clamping member and the second clamping member are respectively disposed at both ends of the movable slide, and the third clamping member and the fourth clamping member can move closer to each other or further away and maintain the position after movement so as to clamp both ends of the other side of the engine cylinder head.

2. The engine cylinder head sealing performance testing device according to claim 1, characterized in that: It also includes a first motor, a first bidirectional lead screw, a first slider, and a second slider. The fixed slide includes a positioning groove. The first bidirectional lead screw is disposed in the positioning groove, and both ends of the first bidirectional lead screw are rotatably connected to the fixed slide. The first motor is fixedly connected to the fixed slide, and the output end of the first motor is fixedly connected to one end of the first bidirectional lead screw that extends out of the fixed slide. The first slider and the second slider are respectively threaded to the two ends of the first bidirectional lead screw with opposite directions of rotation. The first clamping member is fixedly connected to the first slider, and the second clamping member is fixedly connected to the second slider.

3. The engine cylinder head sealing performance testing device according to claim 2, characterized in that: It also includes a second motor, a second bidirectional lead screw, a third slider, and a fourth slider. The second bidirectional lead screw is disposed on the movable slide, and both ends of the second bidirectional lead screw are rotatably connected to the movable slide. The second motor is fixedly connected to the movable slide, and the output shaft of the second motor is fixedly connected to the second bidirectional lead screw. The third slider and the fourth slider are respectively threaded to the two ends of the second bidirectional lead screw with opposite directions of rotation. The third clamping member is fixedly connected to the third slider, and the fourth clamping member is fixedly connected to the fourth slider.

4. The engine cylinder head sealing performance testing device according to claim 3, characterized in that: It also includes an electric slide rail. The testing platform includes a slide groove, which is located on the side of the water tank away from the fixed slide seat. The electric slide rail is located in the slide groove, and the movable slide seat is installed on the electric slide rail so that it can move closer to or further away from the fixed slide seat under the drive of the electric slide rail and maintain the moved position.

5. The engine cylinder head sealing performance testing device according to claim 4, characterized in that: The first clamping member includes a first connecting rod and a first positioning block. One end of the first connecting rod is fixedly connected to the first slider, and the other end is fixedly connected to the first positioning block. The bottom end of the first positioning block extends into the water tank. The second clamping member includes a second connecting rod and a second positioning block. One end of the second connecting rod is fixedly connected to the second slider, and the other end is fixedly connected to the second positioning block. The bottom end of the second positioning block extends into the water tank. The third clamping member includes a third connecting rod and a third positioning block. One end of the third connecting rod is fixedly connected to the third slider, and the other end is fixedly connected to the third positioning block. The bottom end of the third positioning block extends into the water tank. The fourth clamping member includes a fourth connecting rod and a fourth positioning block. One end of the fourth connecting rod is fixedly connected to the fourth slider, and the other end is fixedly connected to the fourth positioning block. The bottom end of the fourth positioning block extends into the water tank.

6. The engine cylinder head sealing performance testing device according to claim 5, characterized in that: The first positioning block, the second positioning block, the third positioning block and the fourth positioning block are all L-shaped structures.

7. The engine cylinder head sealing performance testing device according to claim 6, characterized in that: It also includes multiple rubber blocks, and the first positioning block, the second positioning block, the third positioning block and the fourth positioning block are each provided with multiple rubber blocks at the positions where they contact the engine cylinder head.

8. The engine cylinder head sealing performance testing device according to claim 1, characterized in that: The inflation mechanism includes a fixed plate, an air pump, and an inflation pipe. The fixed plate is fixedly connected to the test bench, the air pump is fixedly connected to the fixed plate, one end of the inflation pipe is connected to and communicates with the output end of the air pump, and the other end is used to connect and communicate with the spark plug port to inflate the engine cylinder head.

Images