A water-cooled engine leak detection cylinder head automatic pressing sealing mechanism

Abstract

The utility model relates to cylinder cover testing arrangement field discloses a kind of cylinder cover automatic compression sealing mechanism for water-cooled engine leak hunting, including lower fixed plate, the four corner position of lower fixed plate surface is equipped with light axle, the top of light axle is connected with upper fixed plate, the central part of upper fixed plate surface is equipped with multiple gas-liquid pressure cylinder, the output shaft of multiple gas-liquid pressure cylinder extends to the bottom of upper fixed plate and is connected with presser plate, by upper fixed plate, lengthened linear bearing, light axle and lower fixed plate, multiple gas-liquid pressure cylinder can be made to move after being started to push presser plate, presser plate and multiple upper pressing block are compressed and fixed to cylinder cover, by preventing cylinder cover from deviating during testing process, the stability when testing is improved, workload is reduced simultaneously, the efficiency of testing is improved, and cylinder cover is stressed evenly during testing process, the effect of sealing is better, it is convenient and fast to operate, manpower cost is reduced, and it is convenient for internet of things management.

Description

Technical Field

[0001] This utility model relates to the field of cylinder head testing devices, and in particular to an automatic cylinder head pressing and sealing mechanism for leak testing of water-cooled engines. Background Technology

[0002] Currently, water-cooled engines have a cooling water jacket inside the cylinder head, and the cooling water holes on the lower end face of the cylinder head are connected to the cooling water holes in the cylinder block. Due to casting defects such as sand holes and shrinkage cavities, water channel leakage may occur, which is a common mode of cylinder head failure. Leak testing requires the installation of a large number of bolts, resulting in a high workload.

[0003] Most testing fixtures on the market currently use steel plates and rubber rings, tightened with a large number of bolts, to test for leaks in cylinder heads. However, this method is labor-intensive, time-consuming, and the bolt torque varies, resulting in uneven tightening force, which makes it impossible to effectively test for leaks in cylinder heads. Therefore, an automatic cylinder head tightening and sealing mechanism for leak testing of water-cooled engines is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an automatic cylinder head pressing and sealing mechanism for leak testing of water-cooled engines. It aims to improve the problems of high workload, high time cost, and uneven clamping force due to different bolt torques in the prior art, which makes it impossible to effectively test for leaks in the cylinder head.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine includes a lower fixed plate. Optical shafts are installed at the four corners of the lower fixed plate. An upper fixed plate is connected to the top of the optical shafts. Multiple sets of gas-hydraulic booster cylinders are installed at the center of the upper fixed plate. The output shafts of the multiple sets of gas-hydraulic booster cylinders extend to the bottom of the upper fixed plate and are connected to a pressure plate. Extended linear bearings are connected to the four corners of the pressure plate and are slidably connected to the surface of the optical shafts. Multiple sets of upper pressure blocks are connected to the bottom of the pressure plate, and these upper pressure blocks are matched with the multiple sets of gas-hydraulic booster cylinders. A cylinder bracket is installed on one side of the lower fixed plate. A first cylinder is installed inside the cylinder bracket. The output end of the first cylinder is connected to a thermostat hole cover. A quick-connect fitting for a gas pipe is connected to the outside of the thermostat hole cover. A second cylinder is connected to the bottom of one side of the pressure plate, and the output end of the second cylinder is connected to a plug-hole pressure head.

[0007] As a further description of the above technical solution:

[0008] Two sets of rollers placed side by side are mounted on the surface of the lower fixed plate, and a two-stage double-acting cylinder is mounted at the center of the two sets of rollers.

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

[0010] The output end of the two-stage double-acting cylinder is connected to a tooling base plate, and the surface of the tooling base plate is provided with multiple sets of sealing gaskets.

[0011] As a further description of the above technical solution:

[0012] Multiple sets of seated bearings L-shaped are installed on the surface of the lower fixed plate, the roller is installed inside the seated bearings L-shaped, and a base plate guide shaft is installed on one side of the multiple sets of seated bearings L-shaped;

[0013] As a further description of the above technical solution:

[0014] A toothed locking nut is installed on the surface of the upper fixing plate at the top of the optical axis, and multiple sets of eye bolts are installed on the surface of the upper fixing plate;

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

[0016] The thermostat hole cover is provided with a first O-ring inside, and the plug hole pressure head is provided with a second O-ring on its surface;

[0017] As a further description of the above technical solution:

[0018] A plug hole cylinder support is installed at one end of the bottom of the pressure plate, and the second cylinder is installed inside the plug hole cylinder support. The plug hole cylinder support is positioned corresponding to the cylinder bracket.

[0019] This utility model has the following beneficial effects:

[0020] 1. In this utility model, by using the upper fixing plate, the extended linear bearing, the optical shaft and the lower fixing plate together, multiple sets of gas-liquid booster cylinders can be started to push the pressure plate to move. The pressure plate and multiple sets of upper pressure blocks press and fix the cylinder head, preventing the cylinder head from shifting during the test, improving the stability during the test, reducing the workload, improving the efficiency of the test, and ensuring that the cylinder head is subjected to uniform force during the test, thus improving the sealing effect.

[0021] 2. In this utility model, the thermostat holes on both sides of the cylinder head are sealed by the plug hole pressure head and the second cylinder. After one side is sealed, the cylinder bracket, thermostat hole cover and the first cylinder seal the other side. The quick-connect pipe can then be used to test for leaks inside the cylinder head through the thermostat hole. The operation is convenient and quick, reduces labor costs and facilitates IoT management. Attached Figure Description

[0022] Figure 1This is a three-dimensional schematic diagram of an automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine proposed in this utility model;

[0023] Figure 2 This is a first-view structural schematic diagram of an automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine proposed in this utility model.

[0024] Figure 3 This is a second-view structural schematic diagram of an automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine proposed in this utility model.

[0025] Figure 4 This utility model proposes an automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine. Figure 2 Enlarged structural diagram at point A in the middle;

[0026] Figure 5 This utility model proposes an automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine. Figure 3 Enlarged structural diagram at point B.

[0027] Legend:

[0028] 1. Cylinder support with plug hole; 2. Gas-liquid booster cylinder; 3. Two-stage double-acting cylinder; 4. Lifting eye screw; 5. Tooling base plate; 6. Upper fixing plate; 7. Pressure plate; 8. Extended linear bearing; 9. L-type bearing with seat; 10. Optical shaft; 11. Roller; 12. Lower fixing plate; 13. Upper pressure block; 14. Cylinder bracket; 15. Base plate guide shaft; 16. First O-ring; 17. Thermostat hole cover; 18. Sealing gasket; 19. Threaded locking nut; 20. First cylinder; 21. Plug hole pressure head; 22. Second O-ring; 23. Second cylinder; 24. Quick-connect fitting for air pipe. Detailed Implementation

[0029] 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.

[0030] Reference Figures 1-5This utility model provides an embodiment of an automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine. It includes a lower fixed plate 12, with optical shafts 10 installed at the four corners of the lower fixed plate 12. An upper fixed plate 6 is connected to the top of the optical shafts 10. Multiple sets of gas-hydraulic booster cylinders 2 are installed at the center of the upper fixed plate 6. The output shafts of the multiple sets of gas-hydraulic booster cylinders 2 extend to the bottom of the upper fixed plate 6 and are connected to a pressure plate 7. Extended linear bearings 8 are connected to the four corners of the pressure plate 7 and are slidably connected to the surface of the optical shafts 10. Multiple sets of upper pressure blocks 13 are connected to the bottom of the pressure plate 7. These upper pressure blocks 13 are matched with the multiple sets of gas-hydraulic booster cylinders 2. Through the coordinated use of the upper fixed plate 6, extended linear bearings 8, optical shafts 10, and lower fixed plate 12, the multiple sets of gas-hydraulic booster cylinders 2 can be activated to push the pressure plate 7 to move. The pressure plate 7 and the multiple sets of upper pressure blocks 13 press and fix the cylinder head, preventing cylinder head displacement during testing and improving stability during testing. Qualitative analysis reduces workload and improves testing efficiency. The cylinder head experiences uniform force during testing, enhancing sealing performance. Furthermore, a PLC-controlled solenoid valve controls the gas-liquid booster cylinder 2, applying digital control principles. A cylinder bracket 14 is mounted on one side of the lower fixed plate 12. A first cylinder 20 is installed inside the cylinder bracket 14. The output end of the first cylinder 20 is connected to a thermostat hole cover 17, and a quick-connect fitting 24 for the air hose is connected to the outside of the thermostat hole cover 17. A second cylinder 23 is connected to the bottom of one side of the pressure plate 7. The output end of the second cylinder 23 is connected to a plug-hole pressure head 21. The plug-hole pressure head 21 and the second cylinder 23 seal the thermostat holes on both sides of the cylinder head. After sealing one side, the cylinder bracket 14, thermostat hole cover 17, and first cylinder 20 seal the other side. The quick-connect fitting 24 can then be used to test for leaks inside the cylinder head through the thermostat holes. This convenient and quick operation reduces labor costs and facilitates IoT management.

[0031] Reference Figure 2 Two sets of rollers 11 are mounted side by side on the surface of the lower fixed plate 12. A two-stage double-acting cylinder 3 is mounted at the center of the two sets of rollers 11. The output end of the two-stage double-acting cylinder 3 is connected to a tooling base plate 5. Multiple sets of sealing gaskets 18 are provided on the surface of the tooling base plate 5. Multiple sets of seated bearing L-shaped 9 are mounted on the surface of the lower fixed plate 12. The rollers 11 are installed inside the seated bearing L-shaped 9. A base plate guide shaft 15 is mounted on one side of the multiple sets of seated bearing L-shaped 9. The tooling to be tested can be placed through the tooling base plate 5. The multiple sets of sealing gaskets 18 on the surface of the tooling base plate 5 correspond to the holes at the bottom of the cylinder head to seal the cylinder head. After the tooling base plate 5 is started, it can be pushed to move under the action of the seated bearing L-shaped 9, rollers 11 and base plate guide shaft 15, so that the material can be picked up after the test is completed.

[0032] Reference Figures 1-2A toothed locking nut 19 is installed on the top of the optical axis 10 on the surface of the upper fixing plate 6. Multiple sets of eye bolts 4 are installed on the surface of the upper fixing plate 6. The optical axis 10 can be fixed and locked by the toothed locking nut 19, and the eye bolts 4 facilitate the hoisting of the main body of the mechanism.

[0033] Reference Figures 4-5 The thermostat hole cover 17 has a first O-ring 16 inside, and the surface of the plug hole pressure head 21 has a second O-ring 22. A plug hole cylinder support 1 is installed at one end of the bottom of the pressure plate 7, and a second cylinder 23 is installed inside the plug hole cylinder support 1. The plug hole cylinder support 1 and the cylinder bracket 14 are positioned correspondingly. The thermostat hole can be sealed by the first O-ring 16 and the second O-ring 22 to avoid leakage during testing and improve the accuracy of the test.

[0034] Working principle: In use, connect the mechanism to the appropriate control system. Place the fixture to be tested on the surface of the fixture base plate 5, aligning the multiple sets of sealing gaskets 18 with the holes at the bottom of the cylinder head. When the fixture base plate 5 moves to the bottom of the pressure plate 7, activate the gas-liquid booster cylinder 2 to push the pressure plate 7 downwards. The pressure plate 7 and the upper pressure block 13 press and fix the cylinder head, ensuring even force distribution on the cylinder head. Then, activate the first cylinder 20 and the second cylinder 23. The first cylinder 20 pushes the first O-ring 16 and the thermostat hole cover 17 into place. The cylinder head moves to seal the thermostat hole on one side. The second cylinder 23 pushes the plug head 21 and the second O-ring 22 to move and seal the thermostat hole on the other side. The quick-connect fitting 24 of the air pipe is connected to the external leak tester through the air pipe to pressurize and test the leak inside the cylinder head. After the test is completed, the first cylinder 20 and the second cylinder 23 retract first, and then the gas-liquid booster cylinder 2 retracts. At this time, the second-stage double-acting cylinder 3 is activated to move the tooling base plate 5 to facilitate the removal of the tooling base plate 5 after the test is completed.

[0035] 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 automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine, comprising a lower fixing plate (12), characterized in that: Optical shafts (10) are installed at the four corners of the surface of the lower fixed plate (12). An upper fixed plate (6) is connected to the top of the optical shafts (10). Multiple sets of gas-liquid booster cylinders (2) are installed at the center of the surface of the upper fixed plate (6). The output shafts of the multiple sets of gas-liquid booster cylinders (2) extend to the bottom of the upper fixed plate (6) and are connected to a pressure plate (7). Extended linear bearings (8) are connected to the four corners of the pressure plate (7), and the extended linear bearings (8) are slidably connected to the surface of the optical shafts (10). Multiple sets of upper pressure blocks are connected to the bottom of the pressure plate (7). 13) Multiple sets of upper pressure blocks (13) are matched with multiple sets of gas-liquid booster cylinders (2). A cylinder bracket (14) is installed on one side of the surface of the lower fixed plate (12). A first cylinder (20) is installed inside the cylinder bracket (14). The output end of the first cylinder (20) is connected to a thermostat hole cover (17). A quick-connect pipe connector (24) is connected to the outside of the thermostat hole cover (17). A second cylinder (23) is connected to the bottom of one side of the pressure plate (7). The output end of the second cylinder (23) is connected to a plug hole pressure head (21).

2. The automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine according to claim 1, characterized in that: The surface of the lower fixed plate (12) is equipped with two sets of rollers (11) placed side by side, and a two-stage double-acting cylinder (3) is installed at the center of the two sets of rollers (11).

3. The automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine according to claim 2, characterized in that: The output end of the secondary double-acting cylinder (3) is connected to a tooling base plate (5), and the surface of the tooling base plate (5) is provided with multiple sets of sealing gaskets (18).

4. The automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine according to claim 2, characterized in that: Multiple sets of seated bearing L-shaped (9) are installed on the surface of the lower fixed plate (12), and the roller (11) is installed inside the seated bearing L-shaped (9). A bottom plate guide shaft (15) is installed on one side of the multiple sets of seated bearing L-shaped (9).

5. The automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine according to claim 1, characterized in that: The top of the optical axis (10) is fitted with a toothed locking nut (19) on the surface of the upper fixing plate (6), and multiple sets of eye bolts (4) are fitted on the surface of the upper fixing plate (6).

6. The automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine according to claim 1, characterized in that: The thermostat hole cover (17) is provided with a first O-ring (16) inside, and the plug hole pressure head (21) is provided with a second O-ring (22) on its surface.

7. The automatic cylinder head pressing and sealing mechanism for leak testing of a water-cooled engine according to claim 1, characterized in that: A plug hole cylinder support (1) is installed at one end of the bottom of the pressure plate (7), and the second cylinder (23) is installed inside the plug hole cylinder support (1). The plug hole cylinder support (1) is positioned opposite to the cylinder bracket (14).

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