Air cylinder and vehicle

Abstract

The invention discloses an air cylinder and a vehicle, the air cylinder comprises a cylinder cover, a timing cover and a cylinder head cover, the timing cover is connected with one side of the cylinder cover, the cylinder head cover is arranged on the cylinder cover and the timing cover in a covering mode, and the air cylinder is configured in the mode that when the cylinder head cover is connected with the cylinder cover in an attached mode, a gap is formed between the timing cover and the cylinder head cover; the air cylinder further comprises a sealing gasket arranged between the timing cover and the cylinder head cover, and the width of the gap is smaller than or equal to 5% of the thickness of the sealing gasket. According to the timing cover, the gap with the width being 5% of the thickness of the sealing gasket is formed between the timing cover and the cylinder head cover and used for containing the sealing gasket, so that after the cylinder head cover and the timing cover are sealed through the sealing gasket, the cylinder head cover and the cylinder head can be completely attached, the sealing quality of an air cylinder is guaranteed, and meanwhile the sealing effect of the air cylinder is improved. And excessive compression of the sealing gasket caused by forcibly locking the cylinder head cover and the timing cover in order to enable the cylinder head cover to be attached to the cylinder head is avoided, and the sealing effect is further guaranteed.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and more particularly, to a cylinder and a vehicle. Background Art

[0002] The cylinder usually includes a cylinder head, a timing cover and a cylinder head cover. The timing cover is connected to the side end of the cylinder head. The cylinder head cover is arranged on the cylinder head and the timing cover and is connected to the cylinder head and the timing cover respectively. The cylinder head cover and the cylinder head are sealed by applying a flat sealant, and the cylinder head cover and the timing cover are sealed by a gasket. During the processing, if there are processing defects on the interconnected end faces of the cylinder head cover or the timing cover, such as knife marks or protrusions, the side where the cylinder head cover is connected to the timing cover will be lifted up, causing the cylinder head cover to be raised on the side connected to the cylinder head, resulting in a gap between the cylinder head cover and the cylinder head, which may cause the sealant to not be completely sealed and the sealing condition to be poor. If the cylinder head cover and the timing cover are forcibly locked so that the cylinder head cover fits the cylinder head, the gasket will be over-compressed, affecting the service life of the gasket. Summary of the Invention

[0003] Embodiments of the present application provide a cylinder and a vehicle.

[0004] The cylinder of the embodiment of the present application includes a cylinder head, a timing cover and a cylinder head cover, the timing cover is connected to one side of the cylinder head, and the cylinder head cover is arranged on the cylinder head and the timing cover. The cylinder is configured so that when the cylinder head cover is fitted and connected to the cylinder head, a gap is formed between the timing cover and the cylinder head cover. The cylinder also includes a sealing gasket arranged between the timing cover and the cylinder head cover, and the width of the gap is less than or equal to 5% of the thickness of the sealing gasket.

[0005] The timing cover provided in the embodiment of the present application forms a gap with a width of 5% of the gasket thickness between the timing cover and the cylinder head cover to accommodate the gasket, so that after the cylinder head cover and the timing cover are sealed by the gasket, the cylinder head cover and the cylinder head can be completely fitted together, thereby ensuring the sealing quality of the cylinder. At the same time, it also avoids excessive compression of the gasket caused by forcibly locking the cylinder head cover and the timing cover to make them fit together, thereby further ensuring the sealing effect.

[0006] In certain embodiments, the cylinder head includes a first connecting surface connected to the cylinder head cover, the timing cover includes a second connecting surface connected to the cylinder head cover and substantially coplanar with the first connecting surface, the cylinder head cover includes a third connecting surface connected to the first connecting surface and a fourth connecting surface connected to the second connecting surface, the fourth connecting surface being recessed relative to the third connecting surface so as to form the gap between the fourth connecting surface and the second connecting surface.

[0007] In this way, the surface of the cylinder head cover close to the timing cover can be raised, thereby forming a gap between the fourth connecting surface and the second connecting surface.

[0008] In some embodiments, the cylinder head includes a first connecting surface connected to the cylinder head cover, the timing cover includes a second connecting surface connected to the cylinder head cover, the cylinder head cover includes a third connecting surface connected to the first connecting surface and a fourth connecting surface connected to the second connecting surface and basically coplanar with the third connecting surface, and the second connecting surface is recessed relative to the first connecting surface to form the gap between the fourth connecting surface and the second connecting surface.

[0009] In this way, the timing cover can be lowered close to the surface of the cylinder head cover, thereby forming a gap between the fourth connecting surface and the second connecting surface.

[0010] In some embodiments, the timing cover includes a cavity outer wall, the cavity outer wall protrudes upward from the second connecting surface, the cavity outer wall includes a first cylindrical surface connected to the second connecting surface, and the second connecting surface has a discontinuous transition with the first cylindrical surface.

[0011] In this way, the second connecting surface and the first cylindrical surface have a discontinuous transition, so that the second connecting surface and the first cylindrical surface can be processed by two tools, which is beneficial to reducing the difficulty of processing the timing cover.

[0012] In some embodiments, one end of the first cylindrical surface adjacent to the second connecting surface is recessed relative to the second connecting surface.

[0013] In this way, further concave the first cylindrical surface, thereby avoiding damage to the sealing gasket and increasing the service life of the sealing gasket.

[0014] In some embodiments, a depth by which an end of the first cylindrical surface close to the second connecting surface is sunken relative to the second connecting surface is less than or equal to 2% of a thickness of the sealing gasket.

[0015] In this way, no large step or corner is formed between the first cylindrical surface and the second connecting surface, which is beneficial to improving the sealing quality of the connection between the first cylindrical surface and the second connecting surface.

[0016] In some embodiments, the outer wall of the cavity includes a second cylindrical surface connected to the first cylindrical surface, and the first cylindrical surface and the second cylindrical surface are continuously transitioned.

[0017] In this way, the first cylindrical surface and the second cylindrical surface transition continuously, which is beneficial to improving the sealing quality at the connection between the first cylindrical surface and the second cylindrical surface.

[0018] In certain embodiments, the cylinder head cover includes a third cylindrical surface matched with the second cylindrical surface, and a gap width between the second cylindrical surface and the third cylindrical surface is less than or equal to 5% of a thickness of the sealing gasket.

[0019] Thus, setting a larger gap here can avoid excessive compression of the sealing gasket here, which is beneficial to improving the sealing quality.

[0020] In some embodiments, the outer wall of the cavity includes a fifth connecting surface connected to the second cylindrical surface, and the second cylindrical surface transitions continuously with the fifth connecting surface.

[0021] In this way, the fifth connecting surface and the second cylindrical surface are tangentially transitioned, which is beneficial to improving the sealing quality of the connection between the fifth connecting surface and the second cylindrical surface.

[0022] In certain embodiments, the cylinder head cover includes a sixth connecting surface that cooperates with the fifth connecting surface, and a gap width between the fifth connecting surface and the sixth connecting surface is less than or equal to 5% of a thickness of the sealing gasket.

[0023] Thus, setting a larger gap here can avoid excessive compression of the sealing gasket here, which is beneficial to improving the sealing quality.

[0024] A vehicle according to another embodiment of the present application includes the cylinder described in any one of the above items.

[0025] Additional aspects and advantages of the embodiments of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 Schematic diagram of the structure of the cylinder according to the embodiment of the present application;

[0028] Figure 2 1 is a schematic diagram of the assembly of a cylinder head cover of a cylinder according to an embodiment of the present application;

[0029] Figure 3 is a top view of a timing cover and a cylinder head of a cylinder according to an embodiment of the present application;

[0030] Figure 4 is a bottom view of a cylinder head cover of a cylinder according to an embodiment of the present application;

[0031] Figure 5 is a front view of a timing cover of a cylinder according to an embodiment of the present application;

[0032] Figure 6 It is a top view of a timing cover of a cylinder according to an embodiment of the present application.

[0033] Explanation of the main component symbols: cylinder 100, cylinder head 10, first connecting surface 11, timing cover 20, second connecting surface 21, cavity outer wall 22, first cylindrical surface 221, second cylindrical surface 222, fifth connecting surface 223, fifth cylindrical surface 224, sixth cylindrical surface 225, seventh connecting surface 23, cylinder head cover 30, third connecting surface 31, fourth connecting surface 32, third cylindrical surface 33, fourth cylindrical surface 34, sixth connecting surface 35, seventh cylindrical surface 36, eighth cylindrical surface 37, eighth connecting surface 38, sealing gasket 40, gap 50. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and are not to be construed as limiting the present invention. In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore are not to be construed as limiting the present invention. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise specifically defined.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, removable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to direct connections or indirect connections through an intermediary, and they may refer to internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] The disclosure herein provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described herein. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0038] A cylinder typically includes a timing cover, a cylinder head, and a cylinder head cover. The cylinder head cover is located on top of the timing cover and the cylinder head and is connected to the timing cover and the cylinder head, respectively. However, since the cylinder head cover and the cylinder head are sealed by applying a flat sealant, and the cylinder head cover and the timing cover are sealed by a gasket, during the processing, if there are processing defects on the connecting surface of the cylinder head cover and the timing cover, such as knife marks or protrusions, the side where the cylinder head cover and the timing cover are connected will be lifted up, causing the cylinder head cover to rise on the side connected to the cylinder head. As a result, when the cylinder head cover is connected to the cylinder head, the connection near the timing cover will be raised, resulting in the cylinder head cover and the cylinder head not being able to fully fit together, resulting in a poor sealing condition. If the cylinder head cover and the timing cover are forcibly locked to make the cylinder head cover and the cylinder head fit together, the gasket will be overly compressed, affecting the sealing effect.

[0039] See also Figure 1 The present application provides a vehicle including a cylinder 100. The cylinder 100 includes a cylinder head 10, a timing cover 20, and a cylinder head cover 30. The timing cover 20 is connected to one side of the cylinder head 10, and the cylinder head cover 30 is provided on the cylinder head 10 and the timing cover 20. The cylinder 100 is configured such that when the cylinder head cover 30 is fitted and connected to the cylinder head 10, a gap 50 is formed between the timing cover 20 and the cylinder head cover 30. The cylinder 100 further includes a sealing gasket 40 provided between the timing cover 20 and the cylinder head cover 30. The width of the gap 50 is less than or equal to 5% of the thickness of the sealing gasket 40.

[0040] The timing cover 20 provided in the embodiment of the present application forms a gap 50 with a width of 5% of the thickness of the gasket 40 between the timing cover 20 and the cylinder head cover 30 for accommodating the gasket 40, so that after the cylinder head cover 30 and the timing cover 20 are sealed by the gasket 40, the cylinder head cover 30 and the cylinder head 10 can be completely fitted together, thereby ensuring the sealing quality of the cylinder 100. At the same time, it also avoids excessive compression of the gasket 40 caused by forcibly locking the cylinder head cover 30 and the timing cover 20 to make the cylinder head cover 30 and the cylinder head 10 fit together, thereby further ensuring the sealing effect.

[0041] See also Figure 1 and Figure 2 Specifically, cylinder 100 refers to the cylindrical metal component that guides the piston's linear reciprocating motion within the cylinder. It serves as the cavity within the internal combustion engine's cylinder block, housing the piston and providing the path for the piston's motion. It also serves as the location where gas is compressed by the piston in the compressor, increasing its pressure.

[0042] The timing cover 20 is also called the engine timing cover 20 cover and is an important component of the engine. The timing cover 20 is a component fixed to the side of the engine and connected to the cylinder block. It is mainly used to protect the timing gear and chain (or transmission devices such as timing belts). The timing cover 20 is mostly made of aluminum alloy castings, which is connected to the cylinder head cover 30 at the top and the oil pan at the bottom. A crankshaft oil seal hole is usually provided at the lower end. In addition, the timing cover 20 may also be made of materials such as plastic, depending on the vehicle model and the manufacturer's design. In the embodiment of the present application, the timing cover 20 is an integrated structure that is integrally processed and formed, and its material is aluminum alloy.

[0043] The cylinder head 10, also known as the cylinder head, is a key component in internal combustion engines (such as those found in automobiles, ships, and aircraft). It sits above the cylinder block and, together with the cylinder block, forms a sealed combustion chamber. In the present embodiment, the cylinder head 10 is a one-piece, integrally machined structure made of aluminum alloy.

[0044] The cylinder head cover 30 is a crucial engine component, also known as the cylinder head cover 30 or valve cover. Its primary function is to cover and seal the cylinder head 10, preventing foreign matter from entering the engine interior and providing a seal. In this embodiment, the cylinder head cover 30 is a one-piece, integrally machined structure made of aluminum alloy.

[0045] In the embodiment of the present application, a seal needs to be formed between the cylinder head cover 30 and the cylinder head 10, and the seal between the cylinder head cover 30 and the cylinder head 10 is mainly achieved by sealant. The sealant can effectively isolate the lubricating oil in the cylinder head cover 30 and the cylinder head 10 to prevent it from leaking out. The sealant not only prevents the lubricating oil from leaking out, but also plays a role in isolating the internal environment of the cylinder head cover 30 and the cylinder head 10, preventing external impurities such as dust and moisture from entering the interior of the engine, thereby keeping the internal environment of the engine clean and stable. The intrusion of external impurities may cause damage to the precision components inside the engine, affecting the performance and life of the engine. Therefore, good sealing performance is crucial to protecting engine components.

[0046] Similarly, a seal needs to be formed between the cylinder head cover 30 and the timing cover 20 . The seal is formed between the cylinder head cover 30 and the timing cover 20 by using a sealing material such as a sealing gasket 40 (eg, a rubber-metal sealing gasket 40 ).

[0047] The cylinder head cover 30 and the timing cover 20 are important components of the engine, and the sealing performance between them is directly related to the normal operation of the engine. If the seal is poor, lubricating oil may leak out from the gap 50 between the cylinder head cover 30 and the timing cover 20, which will not only waste lubricating oil, but may also cause damage to other components of the engine. In addition, the working environment inside the engine is complex, with factors such as high temperature, high pressure, and high-speed movement. The seal formed between the cylinder head cover 30 and the timing cover 20 can prevent external impurities such as dust and moisture from entering the interior of the engine, thereby affecting the normal operation of the engine. It can also maintain the cleanliness of the interior of the engine and reduce the damage to the engine caused by impurities.

[0048] In the embodiment of the present application, the sealing gasket 40 is a rubber sealing gasket 40. The compression rate of the rubber sealing gasket 40 during use is usually around 15%. Therefore, the width of the gap 50 is less than or equal to 5% of the thickness of the sealing gasket 40. This will not affect the sealing effect of the rubber sealing gasket 40 due to excessive reduction in the compression rate, and can also ensure that the impact of processing defects can be ignored.

[0049] It should be noted that although the formation of the gap 50 can offset some of the impact of processing defects on the sealing effect, the processing of the connection between the timing cover 20 and the cylinder head cover 30 still needs to ensure processing accuracy and surface roughness to reduce the risk of leakage caused by surface unevenness. At the same time, it is necessary to strictly control the processing tolerance of the width of the gap 50 to ensure that it is within the design range to achieve the best sealing effect.

[0050] In other embodiments, the sealing gasket 40 may also be made of other materials. It should be noted that since the material of the sealing gasket 40 will affect the compression rate of the sealing gasket 40, the width of the gap 50 also needs to be adjusted according to the material of the sealing gasket 40. The specific selection and setting can be based on the actual material selected for the sealing gasket 40 and the current actual needs.

[0051] See also Figure 2 and Figure 4 In some embodiments, the cylinder head 10 includes a first connecting surface 11 connected to the cylinder head cover 30, the timing cover 20 includes a second connecting surface 21 connected to the cylinder head cover 30 and substantially coplanar with the first connecting surface 11, the cylinder head cover 30 includes a third connecting surface 31 connected to the first connecting surface 11 and a fourth connecting surface 32 connected to the second connecting surface 21, the fourth connecting surface 32 being recessed relative to the third connecting surface 31 so as to form a gap 50 between the fourth connecting surface 32 and the second connecting surface 21.

[0052] In this way, the surface of the cylinder head cover 30 close to the timing cover 20 can be raised, thereby forming a gap 50 between the fourth connecting surface 32 and the second connecting surface 21 .

[0053] In some embodiments, the surface of the cylinder head cover 30 close to the timing cover 20 can be lifted upward to form a fourth connecting surface 32, thereby forming a gap 50 between the fourth connecting surface 32 and the second connecting surface 21. Specifically, this can be achieved by cutting and polishing the surface of the cylinder head cover 30 close to the timing cover 20.

[0054] In some embodiments, the cylinder head 10 includes a first connecting surface 11 connected to the cylinder head cover 30, the timing cover 20 includes a second connecting surface 21 connected to the cylinder head cover 30, the cylinder head cover 30 includes a third connecting surface 31 connected to the first connecting surface 11 and a fourth connecting surface 32 connected to the second connecting surface 21 and basically coplanar with the third connecting surface 31, and the second connecting surface 21 is recessed relative to the first connecting surface 11 to form a gap 50 between the fourth connecting surface 32 and the second connecting surface 21.

[0055] In this way, the timing cover 20 may be lowered close to the surface of the cylinder head cover 30 , thereby forming a gap 50 between the fourth connecting surface 32 and the second connecting surface 21 .

[0056] In some embodiments, the surface of the timing cover 20 close to the cylinder head cover 30 can be moved downward to form the second connecting surface 21, thereby forming a gap 50 between the fourth connecting surface 32 and the second connecting surface 21. Specifically, this can be achieved by cutting and polishing the surface of the cylinder head cover 30 close to the timing cover 20.

[0057] In the embodiment of the present application, processing the timing cover 20 has little effect on the structural strength of the timing cover 20, and the timing cover 20 is easy to process. Therefore, it is chosen to move the surface of the side of the timing cover 20 close to the cylinder head cover 30 downward to form a fourth connecting surface 32, so that a gap 50 is formed between the fourth connecting surface 32 and the second connecting surface 21. The width of the gap 50 is 5% of the thickness of the sealing gasket 40, which is about 0.3 mm.

[0058] In other embodiments, the width of the gap 50 may also be adjusted according to actual needs, which will not be elaborated herein.

[0059] Furthermore, in some embodiments, the surface of the cylinder head cover 30 close to the timing cover 20 can be lifted upward to form a fourth connecting surface 32, and the surface of the timing cover 20 close to the cylinder head cover 30 can be moved downward to form a second connecting surface 21, thereby forming a gap 50 between the fourth connecting surface 32 and the second connecting surface 21.

[0060] See also Figure 5 and Figure 6 In some embodiments, the timing cover 20 includes a cavity outer wall 22, which protrudes upward from the second connecting surface 21. The cavity outer wall 22 includes a first cylindrical surface 221 connected to the second connecting surface 21, and the second connecting surface 21 and the first cylindrical surface 221 have a discontinuous transition.

[0061] In this way, the second connecting surface 21 and the first cylindrical surface 221 have a discontinuous transition, so that the second connecting surface 21 and the first cylindrical surface 221 can be processed by two tools, which is beneficial to reducing the difficulty of processing the timing cover 20.

[0062] It is easy to understand that the second connecting surface 21 can be generated by cutting, but it should be noted that when performing surface cutting, two tangent surfaces can only be successfully processed by the same tool. Using the same tool to process two tangent surfaces can ensure the consistency of the two surfaces in terms of finish, roughness and precision. Because the cutting parameters, edge shape and wear conditions of the same tool are the same, the surface quality of the processed surface is also closer. In addition, changing the tool will introduce new error sources, such as tool installation errors, manufacturing errors of the tool itself, etc. These errors may lead to a decrease in the quality of the processed surface. Therefore, in order to reduce errors, it is usually chosen to use the same tool to process two tangent surfaces.

[0063] However, in the embodiment of the present application, one tool is used to process the second connecting surface 21 and the first cylindrical surface 221, which is very difficult and the processing quality cannot be guaranteed. Therefore, in the embodiment of the present application, the connection between the second connecting surface 21 and the first cylindrical surface 221 is set to be non-tangent, that is, the second connecting surface 21 and the first cylindrical surface 221 can be processed separately by two tools, thereby effectively reducing the processing difficulty, improving the processing quality, and being more conducive to preventing the occurrence of raised knife marks that have a great impact on sealing, thereby ensuring sealing performance.

[0064] Furthermore, the cylinder cover is provided on the timing cover 20, and the edge of the cylinder cover is recessed upward to form a receiving groove for receiving the outer wall 22 of the cavity. The receiving groove includes a fourth cylindrical surface 34 connected to the fourth connecting surface 32. A gap 50 is formed between the fourth cylindrical surface 34 and the first cylindrical surface 221.

[0065] See also Figure 5 In some embodiments, one end of the first cylindrical surface 221 close to the second connecting surface 21 is recessed relative to the second connecting surface 21 .

[0066] In this way, by further concave the first cylindrical surface 221 , damage to the sealing gasket 40 can be avoided, thereby increasing the service life of the sealing gasket 40 .

[0067] Specifically, in the embodiment of the present application, without changing the second connecting surface 21 , the first cylindrical surface 221 is further recessed so that the connection between the second connecting surface 21 and the first cylindrical surface 221 is not tangent.

[0068] Furthermore, an obtuse angle is formed at the connection between the second connection surface 21 and the first cylindrical surface 221 . To prevent the sharp corner from damaging the sealing gasket 40 , a transition fillet may be provided at the connection between the second connection surface 21 and the first cylindrical surface 221 .

[0069] In other embodiments, the second connecting surface 21 can also be moved downward without changing the position of the first cylindrical surface 221. It should be noted that such a setting will form a step structure at the connection between the second connecting surface 21 and the first cylindrical surface 221. Therefore, the step structure should be processed during processing to eliminate sharp corners to avoid damage to the sealing gasket 40.

[0070] In some embodiments, the depth of the first cylindrical surface 221 at one end close to the second connecting surface 21 that is sunken relative to the second connecting surface 21 is less than or equal to 2% of the thickness of the sealing gasket 40 .

[0071] In this way, no large step or corner is formed between the first cylindrical surface 221 and the second connecting surface 21 , which is beneficial to improving the sealing quality at the connection between the first cylindrical surface 221 and the second connecting surface 21 .

[0072] Specifically, in the embodiment of the present application, the width of the gap 50 between the second connecting surface 21 and the fourth connecting surface 32 is less than or equal to 2% of the thickness of the sealing gasket 40, which is approximately 0.1 mm, and the width of the gap 50 between the first cylindrical surface 221 and the fourth cylindrical surface 34 is 2% to 4% of the thickness of the sealing gasket 40, which is approximately 0.1 to 0.2 mm.

[0073] See also Figure 5 and Figure 6 In some embodiments, the cavity outer wall 22 includes a second cylindrical surface 222 connected to the first cylindrical surface 221 , and the first cylindrical surface 221 and the second cylindrical surface 222 are continuously transitioned.

[0074] In this way, the first cylindrical surface 221 and the second cylindrical surface 222 are continuously transitioned, which is beneficial to improving the sealing quality at the connection between the first cylindrical surface 221 and the second cylindrical surface 222 .

[0075] Specifically, in the embodiment of the present application, the first cylindrical surface 221 and the second cylindrical surface 222 are tangentially transitioned, which ensures the continuity of the entire contact surface, avoids sudden edges or corners, and can effectively avoid damage to the sealing gasket 40.

[0076] It should be noted that the tangency between the first cylindrical surface 221 and the second cylindrical surface 222 requires very high machining accuracy. CNC machining technology or precision mold forming technology can be selected to ensure that the dimensional accuracy and shape accuracy of the two cylindrical surfaces meet the design requirements.

[0077] In some embodiments, the cylinder head cover 30 includes a third cylindrical surface 33 that cooperates with the second cylindrical surface 222 , and the width of the gap 50 between the second cylindrical surface 222 and the third cylindrical surface 33 is less than or equal to 5% of the thickness of the sealing gasket 40 .

[0078] Thus, providing a larger gap here can prevent the sealing gasket 40 from being over-compressed, which is beneficial to improving the sealing quality.

[0079] Specifically, since the first cylindrical surface 221 and the second cylindrical surface 222 are tangent, the processing difficulty of the first cylindrical surface 221 and the second cylindrical surface 222 is higher and processing defects are more likely to occur. Therefore, the gap 50 between the second cylindrical surface 222 and the fourth connecting surface 32 should be set relatively wide.

[0080] In the embodiment of the present application, the width of the gap 50 between the second cylindrical surface 222 and the third cylindrical surface 33 is less than or equal to 5% of the thickness of the sealing gasket 40 , which is approximately 0.3 mm.

[0081] In some embodiments, the cavity outer wall 22 includes a fifth connecting surface 223 connected to the second cylindrical surface 222 , and the second cylindrical surface 222 and the fifth connecting surface 223 transition continuously.

[0082] In this way, the fifth connecting surface 223 and the second cylindrical surface 222 are tangentially transitioned, which is beneficial to improving the sealing quality of the connection between the fifth connecting surface 223 and the second cylindrical surface 222 .

[0083] Specifically, in the embodiment of the present application, the fifth connecting surface 223 transitions tangentially with the second cylindrical surface 222 , thereby ensuring the continuity of the entire contact surface, avoiding sudden edges or corners, and effectively preventing damage to the sealing gasket 40 .

[0084] It should be noted that the tangency between the fifth connecting surface 223 and the second cylindrical surface 222 requires very high machining accuracy. CNC machining technology or precision mold forming technology can be selected to ensure that the dimensional accuracy and shape accuracy of the two arc surfaces meet the design requirements.

[0085] In some embodiments, the cylinder head cover 30 includes a sixth connection surface 35 that cooperates with the fifth connection surface 223 , and a width of a gap 50 between the fifth connection surface 223 and the sixth connection surface 35 is less than or equal to 5% of the thickness of the sealing gasket 40 .

[0086] Thus, providing a larger gap here can prevent the sealing gasket 40 from being over-compressed, which is beneficial to improving the sealing quality.

[0087] Specifically, since the fifth connecting surface 223 is tangent to the second cylindrical surface 222, the processing difficulty of the fifth connecting surface 223 and the second cylindrical surface 222 is higher and processing defects are more likely to occur. Therefore, the gap 50 between the second cylindrical surface 222 and the fourth connecting surface 32 should be set relatively wide.

[0088] In the embodiment of the present application, the width of the gap 50 between the second cylindrical surface 222 and the fourth connecting surface 32 is less than or equal to 5% of the thickness of the sealing gasket 40 , which is approximately 0.3 mm.

[0089] Furthermore, the outer wall 22 of the cavity further includes a fifth cylindrical surface 224 and a sixth cylindrical surface 225, the timing cover 20 further includes a seventh connecting surface 23, and the cylinder head cover 30 includes a seventh cylindrical surface 36 cooperating with the fifth cylindrical surface 224, an eighth cylindrical surface 37 cooperating with the sixth cylindrical surface 225, and an eighth connecting surface 38 cooperating with the seventh connecting surface 23. In the embodiment of the present application, the processing of the fifth cylindrical surface 224, the sixth cylindrical surface 225, and the seventh connecting surface 23 can correspond to the reference of the second cylindrical surface 222, the first cylindrical surface 221, and the second connecting surface 21, that is, the fifth cylindrical surface 224 and the fifth connecting surface 223 are continuously transitioned, and the width of the gap 50 between the fifth cylindrical surface 224 and the seventh cylindrical surface 36 is less than or equal to 5% of the thickness of the sealing gasket 40, which is about 0.3 mm; the sixth cylindrical surface 225 is tangent to the fifth cylindrical surface 224; the end of the sixth cylindrical surface 225 close to the seventh connecting surface 23 is opposite The seventh connecting surface 23 is sunken, and the width of the gap 50 between the seventh connecting surface 23 and the eighth connecting surface 38 is less than or equal to 2% of the thickness of the sealing gasket 40, which is about 0.1 mm. The width of the gap 50 between the sixth cylindrical surface 225 and the eighth cylindrical surface 37 is 2% to 4% of the thickness of the sealing gasket 40, which is about 0.1 to 0.2 mm. An obtuse angle is formed at the connection between the seventh connecting surface 23 and the sixth cylindrical surface 225. In order to avoid damage to the sealing gasket 40 caused by the sharp corner, a transition fillet can be optionally set at the connection between the seventh connecting surface 23 and the sixth cylindrical surface 225.

[0090] Throughout this specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0091] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, for example, two or three, unless otherwise specifically defined.

[0092] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A cylinder, characterized in that: The cylinder head comprises a cylinder head, a timing cover and a cylinder head cover, wherein the timing cover is connected to one side of the cylinder head, and the cylinder head cover is arranged on the cylinder head and the timing cover. The cylinder is configured so that when the cylinder head cover is fitted and connected to the cylinder head, a gap is formed between the timing cover and the cylinder head cover. The cylinder also comprises a sealing gasket arranged between the timing cover and the cylinder head cover, and the width of the gap is less than or equal to 5% of the thickness of the sealing gasket.

2. The cylinder according to claim 1, characterized in that The cylinder head includes a first connecting surface connected to the cylinder head cover, the timing cover includes a second connecting surface connected to the cylinder head cover and basically coplanar with the first connecting surface, the cylinder head cover includes a third connecting surface connected to the first connecting surface and a fourth connecting surface connected to the second connecting surface, the fourth connecting surface is sunken relative to the third connecting surface to form the gap between the fourth connecting surface and the second connecting surface.

3. The cylinder according to claim 1, characterized in that The cylinder head includes a first connecting surface connected to the cylinder head cover, the timing cover includes a second connecting surface connected to the cylinder head cover, the cylinder head cover includes a third connecting surface connected to the first connecting surface and a fourth connecting surface connected to the second connecting surface and basically coplanar with the third connecting surface, the second connecting surface is recessed relative to the first connecting surface to form the gap between the fourth connecting surface and the second connecting surface.

4. The cylinder according to claim 2 or 3, characterized in that: The timing cover includes a cavity outer wall, the cavity outer wall protrudes upward from the second connecting surface, the cavity outer wall includes a first cylindrical surface connected to the second connecting surface, and the second connecting surface has a discontinuous transition with the first cylindrical surface.

5. The cylinder according to claim 4, characterized in that One end of the first cylindrical surface close to the second connecting surface is recessed relative to the second connecting surface.

6. The cylinder according to claim 5, characterized in that A depth of an end of the first cylindrical surface close to the second connecting surface that is sunken relative to the second connecting surface is less than or equal to 2% of a thickness of the sealing gasket.

7. The cylinder according to claim 4, characterized in that The outer wall of the cavity includes a second cylindrical surface connected to the first cylindrical surface, and the first cylindrical surface and the second cylindrical surface are in continuous transition.

8. The cylinder according to claim 7, characterized in that The cylinder head cover includes a third cylindrical surface matched with the second cylindrical surface, and a gap width between the second cylindrical surface and the third cylindrical surface is less than or equal to 5% of a thickness of the sealing gasket.

9. The cylinder according to claim 7, characterized in that The outer wall of the cavity includes a fifth connecting surface connected to the second cylindrical surface, and the second cylindrical surface and the fifth connecting surface are in continuous transition.

10. The cylinder according to claim 9, characterized in that The cylinder head cover includes a sixth connecting surface matched with the fifth connecting surface, and a gap width between the fifth connecting surface and the sixth connecting surface is less than or equal to 5% of a thickness of the sealing gasket.

11. A vehicle, characterized in that: The invention comprises the cylinder according to any one of claims 1 to 10.

Images