Vehicle engine cylinder cover with structure for preventing leakage at head

Abstract

The utility model relates to the technical field of engine cylinder covers, in particular to a vehicle engine cylinder cover with a structure for preventing leakage at a plug, which comprises a cylinder cover body and a plurality of ducts formed in the cylinder cover body, each duct is provided with a plug structure, each plug structure comprises a plug bolt, and the bottom of each plug bolt extends to form an inserting column; the inserting column is fixedly connected to the bottom of the plug bolt, a threaded groove is formed in the upper end in the hole channel, and a compressible flexible pad is fixedly connected to the bottom end of the inserting column. When the plug bolt is installed in the hole channel, the plug bolt is in threaded connection with the upper end of the hole channel, at the moment, the flexible pad on the inserting column at the lower end of the plug bolt can be compressed, after the plug bolt is completely installed in the hole channel, the flexible pad can be completely installed in the cylinder cover body, and the compressed flexible pad can be unfolded; due to the fact that the length of the hole channel is just equal to the sum of the length of the plug bolt and the length of the inserting column, the flexible pad can just block the bottom of the hole channel, and therefore the sealing performance of the hole channel is improved.

Description

Technical Field

[0001] This application relates to the technical field of engine cylinder heads, especially a vehicle engine cylinder head with a leakage prevention structure at the plug. Background Art

[0002] The "plug" of an engine cylinder head usually refers to a small component used to seal or connect certain holes, channels or interfaces on the cylinder head. These plugs can be thread - connected, press - fitted or other forms of sealing devices, depending on their uses and the design of the cylinder head.

[0003] On the engine cylinder head, plugs may be used for various purposes, including but not limited to: during the engine design and manufacturing process, some holes may be reserved on the cylinder head for future use or testing. If these holes are no longer needed in the final product, plugs are used to seal them to prevent leakage of coolant, oil or other fluids.

[0004] In the prior art, simple thread connection or press - fitting alone cannot guarantee the sealing performance of the plug. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the purpose of this application is a vehicle engine cylinder head with a leakage prevention structure at the plug, which is used to solve the problem of insufficient sealing of the plug.

[0006] The above object of this application is achieved through the following technical solutions: A vehicle engine cylinder head with a leakage prevention structure at the plug includes a cylinder head body and a plurality of holes opened on the cylinder head body. A plug structure is installed on each hole. The plug structure includes a plug bolt, and an insertion column extends from the bottom of the plug bolt. The insertion column is fixedly connected to the bottom of the plug bolt. A threaded groove is opened at the upper end inside the hole, and a compressible flexible pad is fixedly connected to the bottom end of the insertion column.

[0007] By adopting the above - mentioned technical solution, when the plug bolt is installed into the hole, the plug bolt is thread - connected to the upper end of the hole. At this time, the flexible pad on the insertion column at the lower end of the plug bolt will be compressed. When the plug bolt is completely installed into the hole, the flexible pad will completely reach the inside of the cylinder head body, and the compressed flexible pad will expand. Since the length of the hole in this application is just the sum of the lengths of the plug bolt and the insertion column, the flexible pad will just block the bottom of the hole, thereby improving the sealing performance of the hole.

[0008] Furthermore, a rubber layer is fixedly arranged on the outer side of the insertion column.

[0009] By adopting the above - mentioned technical solution, through the setting of the rubber layer, when installing the plug bolt, the sealing performance between the plug bolt and the hole can be further guaranteed.

[0010] Furthermore, a gasket is provided outside the duct.

[0011] By adopting the above technical solution, the setting of the gasket can ensure the sealing performance at the upper end of the plug bolt.

[0012] Furthermore, a flange is fixedly extended at the bottom end of the gasket, and a groove is provided around the duct and opened on the cylinder head body.

[0013] By adopting the above technical solution, it is convenient to replace and install the gasket.

[0014] Furthermore, a stress spring is provided between the gasket and the plug bolt, and the stress spring is sleeved on the plug bolt.

[0015] By adopting the above technical solution, through the setting of the stress spring, after the plug bolt is installed into the duct, the extrusion of the stress spring will ensure that the plug bolt will not become loose.

[0016] Furthermore, a sealing cover is provided at the upper end of the plug bolt, and a slot matching the top of the plug bolt is opened at the bottom of the sealing cover.

[0017] By adopting the above technical solution, the setting of the sealing cover can further ensure the sealing performance outside the plug bolt. Installing the sealing cover on the plug bolt by means of plug connection is convenient for replacement and installation.

[0018] Furthermore, a sealing layer is fixedly provided at both the bottom of the sealing cover and the slot.

[0019] By adopting the above technical solution, the setting of the sealing layer greatly ensures the sealing performance outside the plug bolt.

[0020] Furthermore, the sealing layer is made of flexible rubber.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The flexible pad at the bottom of the plug bolt is compressed during the installation process. When the bolt is fully tightened, the flexible pad unfolds and closely adheres to the bottom of the duct, forming an effective sealing layer, effectively preventing fluids such as coolant and engine oil from leaking from the duct.

[0023] 2. The rubber layer outside the insertion post and the sealing layer in the sealing cover and the slot (made of flexible rubber) further enhance the sealing effect, ensuring good sealing performance even under harsh working conditions such as high pressure and high temperature.

[0024] 3. The plug bolt is tightly connected to the thread groove at the upper end of the duct through threads. At the same time, the extrusion of the stress spring makes the plug bolt not easy to loosen during operation, ensuring the stability of the connection.

[0025] 4. Components such as plug bolts, gaskets, and sealing covers are all designed modularly, enabling easy disassembly and installation when maintenance or replacement is required, reducing maintenance costs and time. The components are fixedly connected by means such as plugging and threaded connection, making the installation process simple and clear, and reducing the problem of sealing failure caused by improper installation.

[0026] 5. The effective sealing performance reduces energy loss and environmental pollution problems caused by fluid leakage, improving the operating efficiency of the engine. The firm connection and excellent sealing performance reduce the risk of component damage caused by factors such as vibration and impact, extending the service life of the engine and its related components. Description of the Drawings

[0027] Figure 1 is the schematic diagram of the overall structure in the embodiment;

[0028] Figure 2 is Figure 1 the enlarged view of part A in

[0029] Figure 3 the schematic diagram of the plug structure in the embodiment.

[0030] Reference numerals: 1, cylinder head body; 10, passage; 11, plug bolt; 12, plug column; 13, flexible pad; 2, stress spring; 21, gasket; 22, groove; 23, flange; 3, sealing cover; 31, slotted opening. Detailed Embodiment

[0031] The following further elaborates on this application with reference to the drawings.

[0032] In the embodiment, refer to Figure 1 , Figure 2 and Figure 3, An automotive engine cylinder head with a leakage prevention structure at the plug, including a cylinder head body and a plurality of channels 10 opened on the cylinder head body. A plug structure is installed on each channel 10. The plug structure includes a plug bolt 11, and a plug post 12 extends from the bottom of the plug bolt 11. The plug post 12 is fixedly connected to the bottom of the plug bolt 11. A threaded groove is opened at the upper end inside the channel 10, and a compressible flexible pad 13 is fixedly connected to the bottom end of the plug post 12. When the plug bolt 11 is installed into the channel 10, the plug bolt 11 is threadedly connected to the upper end of the channel 10. At this time, the flexible pad 13 on the plug post 12 at the lower end of the plug bolt 11 will be compressed. When the plug bolt 11 is completely installed into the channel 10, the flexible pad 13 will completely reach the inside of the cylinder head body, and the compressed flexible pad 13 will expand. Since the length of the channel 10 in this application is exactly the length of the plug bolt 11 plus the plug post 12, the flexible pad 13 will just block the bottom of the channel 10, thereby improving the sealing performance of the channel 10.

[0033] In this embodiment, a rubber layer is fixedly arranged on the outer side of the plug post 12. Through the arrangement of the rubber layer, when installing the plug bolt 11, the sealing performance between the plug bolt 11 and the channel 10 can be further ensured.

[0034] In this embodiment, a gasket 21 is arranged on the outer side of the channel 10. The arrangement of the gasket 21 can ensure the sealing performance at the upper end of the plug bolt 11.

[0035] In this embodiment, a flange 23 extends fixedly from the bottom end of the gasket 21, and a groove 22 opened on the cylinder head body is arranged around the channel 10. It is convenient to replace and install the gasket.

[0036] In this embodiment, a stress spring 2 is arranged between the gasket 21 and the plug bolt 11, and the stress spring 2 is sleeved on the plug bolt 11. Through the arrangement of the stress spring 2, after the plug bolt 11 is installed into the channel 10, the extrusion of the stress spring 2 will ensure that the plug bolt 11 will not become loose.

[0037] In this embodiment, a sealing cover 3 is arranged at the upper end of the plug bolt 11, and a slot 31 matching the top of the plug bolt 11 is opened at the bottom of the sealing cover 3. The arrangement of the sealing cover 3 can further ensure the sealing performance outside the plug bolt 11. Installing the sealing cover 3 on the plug bolt 11 by means of plug connection is convenient for replacement and installation.

[0038] In this embodiment, sealing layers are fixedly arranged at the bottom of the sealing cover 3 and in the slot 31. The arrangement of the sealing layers greatly ensures the sealing performance outside the plug bolt 11. The sealing layers are made of flexible rubber.

[0039] Specific implementation process: First, ensure that the cylinder head body and the hole 10 are clean without impurities, and check that all components are in good condition. Align the insertion column 12 of the plug bolt 11 with the hole 10, and rotate the plug bolt 11 to make a preliminary connection with the thread groove at the upper end of the hole 10. At this time, the flexible gasket 13 begins to be compressed. Continue to tighten the plug bolt 11 until it is completely installed in place, and the flexible gasket 13 fully unfolds and covers the bottom of the hole 10 to achieve a tight seal.

[0040] Subsequently, install the gasket 21 on the plug bolt 11, ensure that the flange 23 of the gasket 21 matches the groove 22 of the cylinder head body, and sleeve a stress spring 2 between the gasket 21 and the plug bolt 11 to generate a squeezing force to ensure stability. Finally, fix the sealing cover 3 to the plug bolt 11 by plugging. The sealing layer at the bottom of the sealing cover 3 is in close contact with the top of the plug bolt 11 to further enhance the outer sealing performance.

[0041] During use, regularly check the fastening condition of the plug bolt 11 to prevent loosening. When it is found that components such as the flexible gasket 13, rubber layer, and sealing layer are aged or damaged, replace them in time to ensure the sealing performance. When cleaning the cylinder head body and the hole 10, avoid scratching the surface with sharp or hard objects to maintain the sealing effect.

[0042] This design realizes the efficient sealing of the cylinder head hole 10 through multiple sealing measures and a stable connection structure, ensures the stable operation of the engine, and facilitates subsequent maintenance and replacement work.

[0043] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of the application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. The cylinder head of a vehicle engine with a leakage prevention structure at the plugging head, characterized in that It includes a cylinder head body and a plurality of channels (10) formed in the cylinder head body. A plug structure is installed on each of the channels (10). The plug structure includes a plug bolt (11). An insertion column (12) extends from the bottom of the plug bolt (11). The insertion column (12) is fixedly connected to the bottom of the plug bolt (11). A threaded groove is formed at the upper end inside the channel (10). A compressible flexible pad (13) is fixedly connected to the bottom end of the insertion column (12).

2. The vehicle engine cylinder head with a leak prevention structure at the plug according to claim 1, characterized in that, A rubber layer is fixedly provided on the outer side of the insertion column (12).

3. The vehicle engine cylinder head with a leak prevention structure at the plug according to claim 1, characterized in that, A gasket (21) is provided on the outer side of the channel (10).

4. The vehicle engine cylinder head with a leakage prevention structure at the plugging head according to claim 3, characterized in that, A flange (23) extends fixedly from the bottom end of the gasket (21). A groove (22) formed in the cylinder head body is provided around the channel (10).

5. The vehicle engine cylinder head with a leak prevention structure at the plugging head according to claim 3, characterized in that, A stress spring (2) is provided between the gasket (21) and the plug bolt (11). The stress spring (2) is sleeved on the plug bolt (11).

6. The vehicle engine cylinder head with a leakage prevention structure at the plugging head according to claim 1, characterized in that, A sealing cover (3) is provided at the upper end of the plug bolt (11). A slot (31) matching the top of the plug bolt (11) is formed at the bottom of the sealing cover (3).

7. The vehicle engine cylinder head with a leakage prevention structure at the plug according to claim 6, characterized in that, Sealing layers are fixedly provided at the bottom of the sealing cover (3) and in the slot (31).

8. The vehicle engine cylinder head with a leak prevention structure at the plug according to claim 7, characterized in that, The sealing layer is made of flexible rubber.

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