A cylinder head structure

Abstract

An embodiment of the present application discloses a cylinder head structure, which can buffer the impact force of the engine oil flowing out of the vacuum pump, weaken the acting force of the engine oil on the glue coating layer, increase the service life of the glue coating layer, and effectively prevent the engine oil from leaking to the outside of the engine. The present application includes: a cylinder head cover body, a cylinder head body, a first oil drain groove provided on the cylinder head cover body, and a second oil drain groove provided on the cylinder head body; the cylinder head cover body is connected to the cylinder head body, and a cylinder head glue coating layer is placed at the connection between the cylinder head cover body and the cylinder head body. The cylinder head glue coating layer is used to seal the connection between the cylinder head cover body and the cylinder head body. The first oil drain groove and the second oil drain groove cooperate to form an oil drain cavity. The cylinder head cover body is connected to the vacuum pump, and the oil drain cavity is placed directly opposite to the oil outlet on the vacuum pump. The oil drain cavity is provided between the oil outlet of the vacuum pump and the cylinder head glue coating layer.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of engine technology, and in particular to a cylinder head structure. Background Art

[0002] When the vehicle is driving, it needs to continuously compress and work in the cylinder to output power outward. The working environment of the cylinder needs to be in a sealed environment. The cylinder cover is used in conjunction with the cylinder. The function of the cylinder cover is to seal the cylinder. Multiple pistons are placed inside the cylinder to form a combustion space between the sealed cylinder and the inside of the cylinder. The piston moves up and down inside the cylinder to compress and burn the gas inside the cylinder and the injected fuel. The cylinder head and the cylinder need to withstand the action of high-temperature and high-pressure fuel gas. At the same time, they are also subject to high heat loads due to contact with high-temperature fuel gas. In order to ensure good sealing of the cylinder, the cylinder head must not be damaged or deformed. Therefore, the cylinder head should have sufficient strength and rigidity.

[0003] A vacuum pump is used in conjunction with the cylinder. The existing engine cylinder head cover is installed on the cylinder head. Glue is applied to the cylinder head cover and the cylinder head for sealing. The oil outlet of the vacuum pump is just opposite to the glue layer. The drive shaft of the vacuum pump is proportional to the engine speed. The higher the engine speed, the greater the oil flow at the vacuum pump outlet and the higher the oil flow rate. Since the existing cylinder head cannot buffer the impact force of the oil at the vacuum pump outlet, it has a great destructive force on the glue layer, which can easily cause oil leakage hazards. Summary of the invention

[0004] The embodiment of the present application provides a cylinder head structure, which can buffer the impact force of the oil flowing out of the vacuum pump, weaken the force of the oil on the rubber layer, increase the life of the rubber layer, and effectively prevent the oil from leaking to the outside of the engine.

[0005] The present application provides a cylinder head structure, comprising: a cylinder head cover body, a cylinder head body, a first oil drain groove arranged on the cylinder head cover body, and a second oil drain groove arranged on the cylinder head body;

[0006] The cylinder head cover body is connected to the cylinder head body, and a cylinder head rubber coating layer is placed at the connection between the cylinder head cover body and the cylinder head body, and the cylinder head rubber coating layer is used to seal the connection between the cylinder head cover body and the cylinder head body, the first oil drain groove and the second oil drain groove cooperate to form an oil drain cavity, the cylinder head cover body is connected to the vacuum pump, and the oil drain cavity is placed positively to the oil outlet on the vacuum pump, the oil drain cavity is arranged between the oil outlet of the vacuum pump and the cylinder head rubber coating layer, the oil drain cavity is used to buffer the oil flowing out of the vacuum pump, and a baffle and a baffle plate are installed at the oil outlet of the vacuum pump, and the baffle plate and the baffle plate are arranged in the oil drain cavity.

[0007] Optionally, a first arc surface is provided on the inner surface of the first oil drain groove on the cylinder head cover body, and the first arc surface is provided as a smooth surface.

[0008] Optionally, a second arc surface is provided on the inner surface of the second oil drain groove on the cylinder head body, and the second arc surface is provided as a smooth surface.

[0009] Optionally, the inner surface of the oil drain cavity is composed of the first arc surface and the second arc surface, and the gap at the connection of the first arc surface and the second arc surface is less than a preset gap.

[0010] Optionally, a first accommodation cavity is provided on the cylinder head cover body, one end of the first oil drain groove communicates with the first accommodation cavity, and the other end of the first oil drain groove is arranged in the cylinder head cover body.

[0011] Optionally, a second accommodation cavity is provided on the cylinder head body, one end of the second oil drain groove communicates with the second accommodation cavity, and the other end of the second accommodation cavity is arranged in the cylinder head body.

[0012] Optionally, the first accommodation cavity and the second accommodation cavity are in contact connection to form a sealed cavity, one end of the oil drain cavity communicates with the sealed cavity, and the other end of the oil drain cavity is arranged in the cylinder head cover body and the cylinder head body.

[0013] Optionally, the baffle is arranged in front of the retaining piece, the retaining piece is in contact with the oil outlet of the vacuum pump, and the baffle is made of a material with bending performance.

[0014] Optionally, a preset distance is provided between the oil outlet of the vacuum pump and the baffle, and the retaining piece is installed within the preset distance.

[0015] Optionally, one end of the retaining piece is installed at the bottom of the preset distance, and the other end of the retaining piece is in contact with but not connected to the oil outlet of the vacuum pump. When the oil flows out from the oil outlet of the vacuum pump and contacts the retaining piece, the oil will push one end of the retaining piece away to form an opening, so that the oil flows into the oil drain cavity from the opening.

[0016] It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

[0017] By providing a first oil drain groove on the cylinder head cover body and a second oil drain groove on the cylinder head body, the cylinder head cover body is connected to the cylinder head body. After the cylinder head cover is connected to the cylinder head, the first oil drain groove and the second oil drain groove are in contact and cooperate to form an oil drain cavity. An adhesive layer for the cylinder head is placed at the connection between the cylinder head cover body and the cylinder head body. The adhesive layer for the cylinder head is used to seal the connection between the cylinder head cover body and the cylinder head body. The cylinder head cover body is connected to a vacuum pump, and the oil drain cavity is placed directly opposite the oil outlet on the vacuum pump. The oil drain cavity is provided between the oil outlet of the vacuum pump and the adhesive layer for the cylinder head. As can be seen from the above, when the engine speed is high, the oil flow rate at the outlet of the vacuum pump is large and the oil flow velocity is also high. The oil flowing out will enter the oil drain cavity. The oil drain cavity can buffer the oil flowing out of the vacuum pump, effectively reducing the impact force generated by the oil flow. Only after the buffered oil contacts the adhesive layer for the cylinder head can the force of the oil on the adhesive layer be weakened, increasing the service life of the adhesive layer and effectively preventing oil from leaking to the outside of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front structural sectional view of the cylinder head structure of the present application;

[0019] Figure 2 is a sectional view of the cylinder head structure of the present application;

[0020] Figure 3 is a partially enlarged schematic view of the cylinder head structure of the present application;

[0021] Figure 4 is a schematic view of the setting position of the first oil drain groove in the cylinder head structure of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In the existing engine, the cylinder head cover is installed on the cylinder head, and glue is applied between the cylinder head cover and the cylinder head for sealing. The oil outlet of the vacuum pump is exactly facing the adhesive layer. The transmission shaft of the vacuum pump is proportional to the engine speed. The higher the engine speed, the greater the oil flow rate at the outlet of the vacuum pump and the higher the oil flow velocity. Since the existing cylinder head cannot buffer the impact force of the oil at the outlet of the vacuum pump, the damage to the adhesive layer is very large, and there is an easy potential for oil leakage.

[0023] Based on this, the present application provides a cylinder head structure that can buffer the impact force of the oil flowing out of the vacuum pump, weaken the force of the oil on the adhesive layer, increase the service life of the adhesive layer, and effectively prevent oil from leaking to the outside of the engine.

[0024] Please refer to Figures 1 to 4, this application provides a cylinder head structure, including: a cylinder head cover body 1, a cylinder head body 2, a first oil drain groove 11 provided on the cylinder head cover body 1, and a second oil drain groove 21 provided on the cylinder head body 2; the cylinder head cover body 1 is connected to the cylinder head body 2, and a cylinder head glue layer 3 is placed at the connection between the cylinder head cover body 1 and the cylinder head body 2, and the cylinder head glue layer 3 is used to seal the connection between the cylinder head cover body 1 and the cylinder head body 2. The first oil drain groove 11 and the second oil drain groove 21 cooperate to form an oil drain cavity 5. The cylinder head cover body 1 is connected to a vacuum pump 4. The oil drain cavity 5 is placed directly opposite to the oil outlet 41 on the vacuum pump 4. The oil drain cavity 5 is arranged between the oil outlet 41 of the vacuum pump 4 and the cylinder head glue layer 3. The oil drain cavity 5 is used to buffer the engine oil flowing out of the vacuum pump 4. A baffle 42 and a retaining piece 43 are installed at the oil outlet 41 of the vacuum pump 4, and the baffle 42 and the retaining piece 43 are arranged in the oil drain cavity 5.

[0025] In the embodiment of the present application, the connection manner between the cylinder head body 2 and the cylinder head cover body 1 is a detachable connection manner. For example, they are connected by bolts or by screws, etc. In the present application, the connection manner between the cylinder head body 2 and the cylinder head cover body 1 is not specifically limited. The working environment inside the cylinder is under high temperature and high pressure conditions. However, when the cylinder head body 2 and the cylinder head cover 1 are connected, there is a reserved gap between the connection planes. Therefore, in order to ensure the sealing performance inside the cylinder, a cylinder head glue coating layer 3 needs to be placed between the cylinder head body 2 and the cylinder head cover body 1. By setting the cylinder head glue coating layer 3, the reserved gap can be effectively filled, so that the space formed by the cylinder head body 2 and the cylinder head cover body 1 is in a sealed environment, enabling the cylinder to operate smoothly. A first oil drain groove 11 is provided on the cylinder head cover body 1. The first oil drain groove 11 is provided on one side of the cylinder head cover body 1. A second oil drain groove 21 is provided on the cylinder head body 2. The second oil drain groove 21 is provided on one side of the cylinder head body 2. It should be noted that when the cylinder head body 2 and the cylinder head cover body 1 are connected and fixed, the first oil drain groove 11 and the second oil drain groove 21 come into contact to form an oil drain cavity 5. The formed oil drain cavity 5 presents a semi-circular shape with a preset angle. In the present application, the preset angle of the oil drain cavity 5 is not limited. The formed oil drain cavity 5 is placed directly opposite to the oil outlet 41 of the vacuum pump 4. Placing directly opposite mainly means that the oil drain cavity 5 and the oil outlet 41 of the vacuum pump 4 are placed on the same horizontal plane. In practical applications, a certain installation height difference is allowed between the installation positions of the oil drain cavity 5 and the vacuum pump 4. The specific value of the height difference is not specifically limited in the present application; when the oil flow rate at the outlet of the vacuum pump 4 is large and the oil flow velocity is also high, the oil flowing out will enter the oil drain cavity 5. The oil drain cavity 5 can buffer the oil flowing out of the vacuum pump 4, effectively reducing the impact force generated by the oil flow. Only after being buffered will the oil contact the cylinder head glue coating layer 3, thereby weakening the acting force of the oil on the glue coating layer, increasing the service life of the glue coating layer, and effectively preventing the oil from leaking to the outside of the engine.

[0026] In some cases, the oil ejected from the oil outlet 41 of the vacuum pump 4 will first enter the first oil drain groove 11 and the second oil drain groove 21. After being buffered by the first oil drain groove 11 and the second oil drain groove 21, the oil flowing out will then contact the cylinder head glue coating layer 3. If the oil drain groove is designed in a right-angled shape or an acute-angled shape, the ejected oil will remain on the right angle and the acute angle, and the remaining oil is not easy to fall off.

[0027] In view of the above problems, the embodiments of the present application provide the following solutions: Optionally, a first arc surface is provided on the inner surface of the first oil drain groove 11 on the cylinder head cover body 1, and the first arc surface is set as a smooth surface; a second arc surface is provided on the inner surface of the second oil drain groove 21 on the cylinder head body 2, and the second arc surface is set as a smooth surface.

[0028] In the embodiments of the present application, the first oil drain groove 11 on the body of the cylinder head cover 1 is set as an arc surface, and the second oil drain groove 21 on the body of the cylinder head 2 is also set as an arc surface. When the oil of the vacuum pump 4 is sprayed onto the first oil drain groove 11 and the second oil drain groove 21, the oil remaining on the surfaces of the first oil drain groove 11 and the second oil drain groove 21 will slide down along the arc surface, and the oil will not remain on the surfaces of the first oil drain groove 11 and the second oil drain groove 21.

[0029] Optionally, the inner surface of the oil drain cavity 5 is composed of the first arc surface and the second arc surface, and the gap at the connection of the first arc surface and the second arc surface is less than a preset gap.

[0030] In the embodiments of the present application, the inner surface of the oil drain cavity 5 is mainly composed of the first arc surface and the second arc surface. Since the first arc surface and the second arc surface are provided with a preset angle, when the oil drain cavity 5 is formed by combination, the oil drain cavity 5 as a whole presents an arc shape with a certain angle. In the present application, the preset angles of the first arc surface and the second arc surface are not specifically limited, and a gap is provided at the contact connection of the first arc surface and the second arc surface, and the provided gap is less than the preset gap. It should be noted here that the preset gap is the gap through which the oil can flow out at a relatively fast speed. Therefore, in order to slow down the impact of the oil on the cylinder head glue layer 3, it is necessary to make the gap provided at the contact connection of the first arc surface and the second arc surface less than the preset gap, so that the oil flowing out of the vacuum pump 4 flows into the cylinder head glue layer 3 from the gap after passing through the oil drain cavity 5, weakening the acting force of the oil on the glue layer, increasing the service life of the glue layer, and effectively preventing the oil from leaking to the outside of the engine.

[0031] Optionally, a first accommodation cavity is provided on the cylinder head cover body 1. One end of the first oil drain groove 11 communicates with the first accommodation cavity, and the other end of the first oil drain groove 11 is arranged in the cylinder head cover body 1; a second accommodation cavity is provided on the cylinder head body 2. One end of the second oil drain groove 21 communicates with the second accommodation cavity, and the other end of the second accommodation cavity is arranged in the cylinder head body 2; the first accommodation cavity and the second accommodation cavity are in contact connection to form a sealed cavity, one end of the oil drain cavity 5 communicates with the sealed cavity, and the other end of the oil drain cavity 5 is arranged in the cylinder head cover body 1 and the cylinder head body 2.

[0032] In the embodiment of the present application, the other end of the first oil drain groove 11 is disposed in the cylinder head cover body 1, which mainly means that the other end of the first oil drain groove 11 does not penetrate the cylinder head cover body 1 and is included inside the cylinder head cover body 1. The other end of the second oil drain groove 21 is disposed in the cylinder head body 2, which mainly means that the other end of the second oil drain groove 21 does not penetrate the cylinder head body 2 and is included in the cylinder head body 2.

[0033] Optionally, the baffle is disposed in front of the flap 43. The flap 43 is in contact with the oil outlet 41 of the vacuum pump 4. The baffle 42 is made of a material with bending performance. A preset distance is provided between the oil outlet 41 of the vacuum pump 4 and the baffle 42. The flap 43 is installed within the preset distance. One end of the flap 43 is installed at the bottom of the preset distance, and the other end of the flap 43 is in contact with but not connected to the oil outlet 41 of the vacuum pump 4. When the oil flows out from the oil outlet 41 of the vacuum pump 4 and contacts the flap 43, the oil will push one end of the flap 43 away to form an opening, so that the oil flows into the oil drain cavity 5 from the opening.

[0034] In the embodiment of the present application, the flap 43 is disposed at the oil outlet 41 of the vacuum pump 4. When the oil in the vacuum pump 4 flows outwards into the oil drain groove, the oil needs to pass through the flap 43 first. It should be noted that the oil flowing out of the vacuum pump 4 has a preset flow rate and pressure, and the flowing oil will push the flap 43 to one side, thereby forming an opening between the flap 43 and the oil outlet 41 of the vacuum pump 4. The oil will flow out from the opening, then flow into the preset distance formed between the oil outlet 41 of the vacuum pump 4 and the baffle 42, and finally flow into the oil drain cavity 5. In the present application, the flap 43 is made of a material with bending performance and can bend according to the characteristics of the material itself when contacting the oil. Here, the specific material of the flap 43 is not specifically limited.

[0035] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0036] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be in electrical, mechanical, or other forms.

[0037] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place, or they can be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0038] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0039] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROM, read-only memory), random access memories (RAM, random access memory), magnetic disks, or optical discs that can store program codes.

Claims

1. A cylinder head structure, characterized in that, Including: A cylinder head cover body, a cylinder head body, a first oil drain groove provided on the cylinder head cover body, and a second oil drain groove provided on the cylinder head body; The cylinder head cover body is connected to the cylinder head body, a cylinder head glue layer is placed at the connection between the cylinder head cover body and the cylinder head body, the cylinder head glue layer is used to seal the connection between the cylinder head cover body and the cylinder head body, the first oil drain groove and the second oil drain groove cooperate to form an oil drain cavity, the cylinder head cover body is connected to a vacuum pump, the oil drain cavity is placed directly opposite to the oil outlet on the vacuum pump, the oil drain cavity is provided between the oil outlet of the vacuum pump and the cylinder head glue layer, the oil drain cavity is used to buffer the oil flowing out of the vacuum pump, a baffle and a retaining piece are installed at the oil outlet of the vacuum pump, the baffle and the retaining piece are arranged in the oil drain cavity, and the baffle and the retaining piece cooperate to slow down the speed of the oil in the vacuum pump flowing into the oil drain cavity.

2. The cylinder head structure according to claim 1, characterized in that, The inner surface of the first oil drain groove on the cylinder head cover body is provided with a first arc surface, and the first arc surface is set as a smooth surface.

3. The cylinder head structure according to claim 2, characterized in that, The inner surface of the second oil drain groove on the cylinder head body is provided with a second arc surface, and the second arc surface is set as a smooth surface.

4. The cylinder head structure according to claim 3, characterized in that The inner surface of the oil drain cavity is composed of the first arc surface and the second arc surface, and the gap at the connection between the first arc surface and the second arc surface is less than a preset gap.

5. The cylinder head structure according to claim 1, characterized in that, A first accommodating cavity is provided on the cylinder head cover body, one end of the first oil drain groove communicates with the first accommodating cavity, and the other end of the first oil drain groove is arranged in the cylinder head cover body.

6. The cylinder head structure according to claim 5, characterized in that, A second accommodating cavity is provided on the cylinder head body, one end of the second oil drain groove communicates with the second accommodating cavity, and the other end of the second accommodating cavity is arranged in the cylinder head body.

7. The cylinder head structure according to claim 6, wherein, The first accommodating cavity and the second accommodating cavity are in contact connection to form a sealed cavity, one end of the oil drain cavity communicates with the sealed cavity, and the other end of the oil drain cavity is arranged in the cylinder head cover body and the cylinder head body.

8. The cylinder head structure according to claim 1, characterized in that, The baffle is arranged in front of the retaining piece, the retaining piece is in contact with the oil outlet of the vacuum pump, and the baffle is made of a material with bending performance.

9. The cylinder head structure according to claim 8, characterized in that, A preset distance is provided between the oil outlet of the vacuum pump and the baffle, and the retaining piece is installed within the preset distance.

10. The cylinder head structure according to claim 9, characterized in that, One end of the retaining piece is installed at the bottom of the preset distance, and the other end of the retaining piece is in contact with but not connected to the oil outlet of the vacuum pump. When the oil flows out of the oil outlet of the vacuum pump and contacts the retaining piece, the oil will push one end of the retaining piece away to form an opening, so that the oil flows into the oil drain cavity from the opening.

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