Cylinder cover gasket, engine and vehicle

Abstract

The invention discloses a cylinder head gasket, an engine and a vehicle. The cylinder cover gasket comprises a first sealing part, a second sealing part, a first limiting piece and a second limiting piece. The first sealing part is connected with the second sealing part; the first limiting piece is arranged on the surface, facing the second sealing part, of the first sealing part; the second limiting piece is arranged on the surface, facing the first sealing part, of the second sealing part, and the first limiting piece and the second limiting piece abut against each other to limit corresponding movement of the first sealing part and the second sealing part. The first limiting piece and the second limiting piece are arranged between the first sealing part and the second sealing part, and the first limiting piece and the second limiting piece can abut against each other, so that when the air cylinder cover repeatedly slaps the air cylinder cover gasket, the first limiting piece and the second limiting piece are continuously and mutually extruded and clamped; the movement between the first sealing part and the second sealing part can be prevented, so that the sealing corrugations cannot be excessively compressed, and the anti-fatigue performance of the sealing corrugations and the sealing performance of the cylinder cover gasket are improved.

Description

Technical Field

[0001] The present application relates to the technical field of engine sealing, and more particularly to a cylinder head gasket, an engine, and a vehicle. Background Art

[0002] In the related art, the cylinder head gasket is the sealing component between the cylinder block and cylinder head of an internal combustion engine. To meet its sealing requirements, the cylinder head gasket needs to withstand extremely high alternating thermal and mechanical loads. As the requirements for in-cylinder combustion in internal combustion engines are becoming increasingly stringent and the explosion pressure is constantly increasing, the bottom surface of the cylinder head is constantly lifted and lowered by the repeated action of high-pressure gas. This causes the cylinder head to repeatedly hit the cylinder head gasket, causing fatigue cracking or flattening of the sealing corrugation, thereby reducing the fatigue resistance of the cylinder head gasket's sealing corrugation and the sealing performance of the cylinder head gasket. Summary of the Invention

[0003] The embodiments of the present application provide a cylinder head gasket, an engine and a vehicle that can solve or improve the technical problem that when the deformation of the cylinder block and the cylinder head increases under the high explosion pressure conditions of the engine, the cylinder head repeatedly hits the cylinder head gasket, causing the sealing corrugation to fatigue crack or be flattened, thereby reducing the fatigue resistance of the sealing corrugation of the cylinder head gasket and reducing the sealing performance of the cylinder head gasket.

[0004] A cylinder head gasket according to an embodiment of the present application includes a first sealing portion, a second sealing portion, a first limiting piece, and a second limiting piece. The first sealing portion is connected to the second sealing portion; the first limiting piece is disposed on a surface of the first sealing portion facing the second sealing portion; and the second limiting piece is disposed on a surface of the second sealing portion facing the first sealing portion. The first limiting piece and the second limiting piece abut against each other to restrict the respective movement of the first and second sealing portions.

[0005] In this way, by arranging the first limiting plate and the second limiting plate between the first sealing part and the second sealing part, and the first limiting plate can abut against the second limiting plate, when the cylinder head repeatedly hits the cylinder head gasket, the continuous mutual squeezing and jamming between the first limiting plate and the second limiting plate can prevent the movement between the first sealing part and the second sealing part, so that the sealing corrugation will not be over-compressed, thereby improving the fatigue resistance of the sealing corrugation and the sealing performance of the cylinder head gasket.

[0006] In certain embodiments, the cylinder head gasket includes a cylinder port, and the cylinder port is penetrated by the first sealing portion and the second sealing portion along a thickness direction of the cylinder head gasket.

[0007] In this way, by providing the cylinder port on the cylinder head gasket, the cylinder head gasket can be prevented from sealing the cylinder block, thereby enabling the cylinder head gasket to seal the cylinder block and the cylinder head.

[0008] In some embodiments, the first sealing portion includes a first sealing rib, the first sealing rib surrounds the cylinder port, and the first limiting piece is arranged around the first sealing rib; the second sealing portion includes a second sealing rib, the second sealing rib surrounds the cylinder port, and the second limiting piece is arranged around the second sealing rib.

[0009] In this way, by arranging the first sealing rib on the circumference of the cylinder port of the first sealing part, the gap between the first sealing part and the cylinder head can be sealed; by arranging the second sealing rib on the circumference of the cylinder port of the second sealing part, the gap between the second sealing part and the cylinder body can be sealed, thereby arranging the first sealing rib and the second sealing rib on the sealing gasket to enhance the sealing ability of the sealing gasket.

[0010] In some embodiments, the height and width of the first limiting piece gradually increase along the radial direction of the cylinder port, and the height and width of the second limiting piece gradually increase along the radial direction of the cylinder port.

[0011] In this way, by setting the height and width of the first limit plate and the second limit plate to gradually increase away from the cylinder port, the cylinder head gasket can balance the axial force distribution of cylinder heads of different specifications, increase the deformation resistance of the cylinder head gasket, and enable the cylinder head gasket to accommodate a higher cylinder head jump amount.

[0012] In some embodiments, the height of the first limiting piece is greater than or equal to 0.05 mm and less than or equal to 1.5 mm, and the width is greater than or equal to 1 mm and less than or equal to 10 mm; the height of the second limiting piece is greater than or equal to 0.05 mm and less than or equal to 1.5 mm, and the width is greater than or equal to 1 mm and less than or equal to 10 mm.

[0013] In this way, by setting the height of the limiting plate on the cylinder head gasket to be greater than or equal to 0.05 mm and less than or equal to 1.5 mm, and the width to be greater than or equal to 1 mm and less than or equal to 10 mm, the first sealing part and the second sealing part can be prevented from moving due to vibration during repeated impact of the cylinder head, thereby providing stable support and limiting effects to the first sealing part and the second sealing part, ensuring that the cylinder head gasket always maintains the correct position and shape.

[0014] In some embodiments, the first limiting piece is connected to the first sealing portion by welding, and the second limiting piece is connected to the second sealing portion by welding.

[0015] In this way, by welding the first limiting piece to the first sealing portion, the strength and rigidity of the first limiting piece can be enhanced, and the first limiting piece's anti-deformation capability can be improved; by welding the second limiting piece to the second sealing portion, the strength and rigidity of the second limiting piece can be enhanced, and the second limiting piece's anti-deformation capability can be improved, thereby improving the sealing performance of the cylinder head gasket.

[0016] In some embodiments, several first limiting pieces are spaced apart to form a first limiting groove for fixing the second limiting piece, and / or several second limiting pieces are spaced apart to form a second limiting groove for fixing the first limiting piece.

[0017] Thus, by forming a first limiting groove between the spaced first limiting pieces to secure the second limiting piece, the first limiting piece and the second limiting piece can be fixed together; and by forming a second limiting groove between the spaced second limiting pieces to secure the first limiting piece, the first limiting piece and the second limiting piece can be fixed together. This prevents movement between the first sealing portion and the second sealing portion, prevents excessive compression of the sealing corrugation, and improves the fatigue resistance of the sealing corrugation and the sealing performance of the cylinder head gasket.

[0018] In some embodiments, a plurality of the first limiting pieces and a plurality of the second limiting pieces are arranged alternately.

[0019] In this way, by staggering the first limiting piece and the second limiting piece, the first limiting piece and the second limiting piece can be staggered and abutted during assembly, thereby reducing the thickness of the cylinder head gasket and reducing the space occupied by the cylinder head gasket.

[0020] In some embodiments, the first limiting groove and the second limiting piece are interference fit, and / or the second limiting groove and the first limiting piece are interference fit.

[0021] In this way, by interference fitting the first limit groove and the second limit plate, and interference fitting the second limit groove and the first limit plate, a certain pressure can be created between the limit groove and the limit plate, so that the two are tightly combined to form a stable connection, and the displacement of the limit plate in the limit groove can be limited, thereby preventing movement between the first sealing part and the second sealing part, so that the sealing corrugation will not be over-compressed, thereby improving the fatigue resistance of the sealing corrugation and the sealing performance of the cylinder head gasket.

[0022] An engine according to an embodiment of the present application includes the cylinder head gasket according to any one of the above embodiments.

[0023] A vehicle according to an embodiment of the present application includes the engine as described in any one of the above embodiments.

[0024] 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

[0025] 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:

[0026] Figure 1 is a schematic structural diagram of a vehicle according to certain embodiments of the present application;

[0027] Figure 2 is a schematic structural diagram of a cylinder head gasket according to certain embodiments of the present application;

[0028] Figure 3 is an exploded view of a cylinder head gasket according to certain embodiments of the present application;

[0029] Figure 4 is a front view of a portion of a cylinder head gasket before assembly according to certain embodiments of the present application;

[0030] Figure 5 is a front view of a portion of a cylinder head gasket after assembly according to certain embodiments of the present application;

[0031] Figure 6 is another front view of a portion of a cylinder head gasket before assembly according to certain embodiments of the present application;

[0032] Figure 7 is another front view of a portion of a cylinder head gasket after assembly according to certain embodiments of the present application;

[0033] Figure 8 is another front view of a portion of a cylinder head gasket before assembly according to certain embodiments of the present application;

[0034] Figure 9 This is another front view of a portion of a cylinder head gasket after assembly according to certain embodiments of the present application.

[0035] Description of Figure Numbers:

[0036] 100. Vehicle; 10. Engine; 11. Cylinder head gasket; 111. First sealing portion; 1111. First sealing rib; 112. Second sealing portion; 1121. Second sealing rib; 113. First limiting plate; 114. Second limiting plate; 115. Cylinder port; 116. First limiting groove; 117. Second limiting groove. DETAILED DESCRIPTION

[0037] The following describes in detail embodiments of the present application. 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 having 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 application and are not to be construed as limiting the present application.

[0038] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting this application. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections. They can refer to mechanical connections or electrical connections. They can refer to direct connections or indirect connections through an intermediary. They can refer to internal communication between two components or interactions between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0040] In this application, 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. Moreover, 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.

[0041] The disclosure herein provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described herein. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers 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 application 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.

[0042] See also Figure 1 、 Figure 2 and Figure 3 A cylinder head gasket 11 according to an embodiment of the present application includes a first sealing portion 111, a second sealing portion 112, a first limiting piece 113, and a second limiting piece 114. The first sealing portion 111 is connected to the second sealing portion 112; the first limiting piece 113 is disposed on the surface of the first sealing portion 111 facing the second sealing portion 112; and the second limiting piece 114 is disposed on the surface of the second sealing portion 112 facing the first sealing portion 111. The first limiting piece 113 and the second limiting piece 114 abut against each other to limit the corresponding movement of the first sealing portion 111 and the second sealing portion 112.

[0043] In this way, by arranging the first limiting plate 113 and the second limiting plate 114 between the first sealing part 111 and the second sealing part 112, and the first limiting plate 113 can abut against the second limiting plate 114, so that when the cylinder head repeatedly hits the cylinder head gasket 11, due to the continuous mutual squeezing and jamming between the first limiting plate 113 and the second limiting plate 114, the movement between the first sealing part 111 and the second sealing part 112 can be prevented, so that the sealing corrugation will not be over-compressed, thereby improving the fatigue resistance of the sealing corrugation and the sealing performance of the cylinder head gasket 11.

[0044] Among them, the engine 10 can serve as the power source of the vehicle 100, responsible for converting the chemical energy of the fuel into mechanical energy, thereby driving the vehicle. The engine 10 of the vehicle 100 includes a horizontally opposed engine 10, an in-line engine 10, or a V-type engine 10. The engine 10 includes a cylinder assembly (not shown in the figure), which can compress or expand gas or liquid through changes in its volume, thereby allowing the engine 10 to generate power. For example, the cylinder assembly can convert the chemical energy of the fuel into thermal energy, and then further convert it into mechanical energy, providing power for the vehicle 100 to travel.

[0045] The cylinder assembly includes a cylinder head, a cylinder block, and a cylinder head gasket 11. Cylinder head gasket 11 is positioned between the cylinder head and the cylinder block, connecting the cylinder head and the cylinder block. This allows the cylinder head to seal the cylinder block, thereby forming the combustion chamber of engine 10. The cylinder head also provides necessary protection for the cylinder block, preventing the high-temperature, high-pressure gases generated during combustion from expanding directly outward. It also prevents external dust and moisture from entering the cylinder block, ensuring the normal operation of engine 10.

[0046] The cylinder head gasket 11 includes a first sealing portion 111, a second sealing portion 112, a first limiting plate 113 and a second limiting plate 114. The first sealing portion 111 and the second sealing portion 112 can be made of a metal material. For example, the first sealing portion 111 and the second sealing portion 112 can be made of a steel plate or a copper plate, so that the first sealing portion 111 and the second sealing portion 112 can produce elastic deformation when the engine 10 is in operation. In addition, the shapes of the first sealing portion 111 and the second sealing portion 112 are adapted to the shape of the connecting surface between the cylinder head and the cylinder head body, so that the first sealing portion 111 and the second sealing portion 112 can be riveted to form the cylinder head gasket 11. For example, relative rivet holes are provided in the first sealing portion 111 and the second sealing portion 112, and the first sealing portion 111 and the second sealing portion 112 can be riveted by inserting rivets into the rivet holes.

[0047] The shape of the first limiting piece 113 and the second limiting piece 114 can be annular. For example, the shape of the first limiting piece 113 and the second limiting piece 114 can be circular or square. The cross-section of the first limiting piece 113 and the second limiting piece 114 can be circular or rectangular. The first limiting piece 113 and the second limiting piece 114 can be arranged between the first sealing portion 111 and the second sealing portion 112. Thus, according to the shape and arrangement position of the first limiting piece 113 and the second limiting piece 114, the first limiting piece 113 and the second limiting piece 114 can cooperate with each other, so that the first limiting piece 113 and the second limiting piece 114 can be used to limit the relative movement between the first sealing portion 111 and the second sealing portion 112. For example, the first limiting piece 113 can be fixed on the inner surface of the first sealing portion 111 facing the second sealing portion 112 by welding, and the second limiting piece 114 can be fixed on the surface of the second sealing portion 112 facing the first sealing portion 111 by welding, so that the first limiting piece 113 and the second limiting piece 114 can be arranged relative to each other. In this way, by welding the first limiting piece 113 to the first sealing portion 111, the strength and rigidity of the first limiting piece 113 can be enhanced, and the deformation resistance of the first limiting piece 113 can be improved; by welding the second limiting piece 114 to the second sealing portion 112, the strength and rigidity of the second limiting piece 114 can be enhanced, and the deformation resistance of the second limiting piece 114 can be improved. In this way, the sealing performance of the cylinder head gasket 11 is improved.

[0048] Also see Figure 4 and Figure 5 The height and width of the first limiting piece 113 and the second limiting piece 114 can be the same, so that when the first sealing part 111 and the second sealing part 112 are assembled, the first limiting piece 113 and the second limiting piece 114 move closer to each other; when the first sealing part 111 and the second sealing part 112 are assembled, the first limiting piece 113 and the second limiting piece 114 can abut against each other, so that when the first sealing part 111 and the second sealing part 112 are squeezed, the first limiting piece 113 and the second limiting piece 114 can limit the corresponding movement of the first sealing part 111 and the second sealing part 112.

[0049] See also Figure 3 In some embodiments, the cylinder head gasket 11 includes a cylinder port 115 , and the cylinder port 115 is penetrated by a first sealing portion 111 and a second sealing portion 112 along the thickness direction of the cylinder head gasket 11 .

[0050] In this way, by providing the cylinder port 115 on the cylinder head gasket 11 , the cylinder head gasket 11 can be prevented from sealing the cylinder block, thereby enabling the cylinder head gasket 11 to seal the cylinder block and the cylinder head.

[0051] Specifically, the cylinder head gasket 11 includes a cylinder port 115, which is penetrated by a first sealing portion 111 and a second sealing portion 112 along the thickness direction of the cylinder head gasket 11. That is, corresponding through-holes are formed in the first sealing portion 111 and the second sealing portion 112. Thus, the cylinder port 115 can connect the cylinder on the cylinder block to the cylinder head, thereby forming a combustion space.

[0052] The number of cylinder ports 115 can be multiple and can correspond to the number of cylinders on the cylinder block. For example, if there are two cylinders on the cylinder block, the number of cylinder ports 115 is two; if there are four cylinders on the cylinder block, the number of cylinder ports 115 is four.

[0053] The annular first limiting piece 113 and the second limiting piece 114 can be disposed around the cylinder port 115 .

[0054] See also Figures 3 to 5 In some embodiments, the first sealing portion 111 includes a first sealing rib 1111, the first sealing rib 1111 surrounds the cylinder port 115, and the first limiting piece 113 is arranged around the first sealing rib 1111; the second sealing portion 112 includes a second sealing rib 1121, the second sealing rib 1121 surrounds the cylinder port 115, and the second limiting piece 114 is arranged around the second sealing rib 1121.

[0055] In this way, by arranging the first sealing rib 1111 on the circumference of the cylinder port 115 of the first sealing portion 111, the gap between the first sealing portion 111 and the cylinder head can be sealed; by arranging the second sealing rib 1121 on the circumference of the cylinder port 115 of the second sealing portion 112, the gap between the second sealing portion 112 and the cylinder body can be sealed, thereby arranging the first sealing rib 1111 and the second sealing rib 1121 on the sealing gasket to enhance the sealing ability of the sealing gasket.

[0056] Specifically, the cylinder head gasket 11 can be used to seal the cylinder head and cylinder block. Sealing ribs are provided on the cylinder head gasket 11 to enhance the sealing performance of the cylinder head gasket 11 through the sealing effect of the sealing ribs. The sealing ribs include a first sealing rib 1111 and a second sealing rib 1121. The first sealing rib 1111 can be provided protruding from the surface of the first sealing portion 111 facing away from the second sealing portion 112, or the first sealing rib 1111 can be integrally formed with the first sealing portion 111. This allows the first sealing rib 1111 to contact the cylinder head. The first sealing rib 1111 is annular in shape, for example, a circular ring or a square ring, so that the first sealing rib 1111 can be provided around the cylinder port 115. The first limiting piece 113 can be arranged around the first sealing rib 1111, and when the first sealing part 111 is squeezed, the first limiting piece 113 can provide a counter force to the force that causes the first sealing rib 1111 to deform, thereby limiting the movement of the first sealing part 111.

[0057] The second sealing rib 1121 can be provided protruding from the surface of the second sealing portion 112 facing away from the first sealing portion 111, or the second sealing rib 1121 can be integrally formed with the second sealing portion 112. This allows the second sealing rib 1121 to contact the cylinder body, and the second sealing rib 1121 is annular in shape, for example, in the shape of a circular ring or a square ring, so that the second sealing rib 1121 can be provided around the cylinder port 115. The second limiting piece 114 can be provided around the second sealing rib 1121, and when the second sealing portion 112 is squeezed, the second limiting piece 114 can provide a counter force to the force that causes the second sealing rib 1121 to deform, thereby limiting the movement of the second sealing portion 112.

[0058] See also Figure 6 and Figure 7 In some embodiments, the height and width of the first limiting piece 113 gradually increase along the radial direction of the cylinder port 115 , and the height and width of the second limiting piece 114 gradually increase along the radial direction of the cylinder port 115 .

[0059] In this way, by setting the height and width of the first limit plate 113 and the second limit plate 114 to gradually increase away from the cylinder port 115, the cylinder head gasket 11 can balance the axial force distribution of cylinder heads of different specifications, increase the deformation resistance of the cylinder head gasket 11, and enable the cylinder head gasket 11 to accommodate a higher cylinder head jump amount.

[0060] Specifically, the cylinder head gasket 11 needs to balance the axial force distribution of cylinder heads of different specifications so that the cylinder head gasket 11 can resist the deformation of the cylinder head and cylinder body, and the cylinder head gasket 11 can accommodate the jump amount of a higher cylinder head. Therefore, the height and width of the first limit plate 113 need to be gradually increased along the radial direction of the cylinder port 115, that is, the height and width of the first limit plate 113 close to the cylinder hole are smaller than the height and width of the first limit plate 113 away from the cylinder hole; the height and width of the second limit plate 114 gradually increase along the radial direction of the cylinder port 115, that is, the height and width of the second limit plate 114 close to the cylinder hole are smaller than the height and width of the second limit plate 114 away from the cylinder hole.

[0061] In some embodiments, the height of the first limiting piece 113 is greater than or equal to 0.05 mm and less than or equal to 1.5 mm, and the width is greater than or equal to 1 mm and less than or equal to 10 mm; the height of the second limiting piece 114 is greater than or equal to 0.05 mm and less than or equal to 1.5 mm, and the width is greater than or equal to 1 mm and less than or equal to 10 mm.

[0062] In this way, by setting the height of the limiting plate on the cylinder head gasket 11 to be greater than or equal to 0.05 mm and less than or equal to 1.5 mm, and the width to be greater than or equal to 1 mm and less than or equal to 10 mm, the first sealing part 111 and the second sealing part 112 can be prevented from moving due to vibration during repeated impact of the cylinder head, thereby providing stable support and limiting effects to the first sealing part 111 and the second sealing part 112, ensuring that the cylinder head gasket 11 always maintains the correct position and shape.

[0063] Specifically, the height of the first limiting piece 113 is greater than or equal to 0.05 mm and less than or equal to 1.5 mm. In some examples, the height of the first limiting piece 113 can be 0.05 mm, 0.35 mm, 0.65 mm, 0.95 mm, 1.25, 1.5 mm, or other values between 0.05 mm and 1.5 mm.

[0064] The width of the first limiting piece 113 is greater than or equal to 1 mm and less than or equal to 10 mm. In some examples, the width of the first limiting piece 113 can be 1 mm, 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, or other values between 1 mm and 10 mm.

[0065] The height of the second limiting piece 114 is greater than or equal to 0.05 mm and less than or equal to 1.5 mm. In some examples, the height of the second limiting piece 114 can be 0.05 mm, 0.35 mm, 0.65 mm, 0.95 mm, 1.25 mm, 1.5 mm, or other values between 0.05 mm and 1.5 mm.

[0066] The width is greater than or equal to 1 mm and less than or equal to 10 mm. In some examples, the width of the second limiting piece 114 can be 1 mm, 2 mm, 4 mm, 6 mm, 8 mm, 10 mm, or other values between 1 mm and 10 mm.

[0067] See also Figures 3 to 9 In some embodiments, several first limiting plates 113 are spaced apart to form a first limiting groove 116 for fixing the second limiting plate 114 , and / or several second limiting plates 114 are spaced apart to form a second limiting groove 117 for fixing the first limiting plate 113 .

[0068] Thus, by forming first limiting grooves 116 between the spaced first limiting pieces 113 for fixing the second limiting pieces 114, the first limiting pieces 113 and the second limiting pieces 114 can be fixed to each other; by forming second limiting grooves 117 between the spaced second limiting pieces 114 for fixing the first limiting pieces 113, the first limiting pieces 113 and the second limiting pieces 114 can be fixed to each other. This prevents movement between the first sealing portion 111 and the second sealing portion 112, prevents the sealing corrugation from being overly compressed, and improves the fatigue resistance of the sealing corrugation and the sealing performance of the cylinder head gasket 11.

[0069] Specifically, there may be multiple first limiting pieces 113, for example, one, two, or three first limiting pieces 113. Furthermore, when there are multiple first limiting pieces 113, the multiple first limiting pieces 113 need to be spaced apart so that a first limiting groove 116 can be formed between the first limiting pieces 113 and the second limiting pieces 113. The first limiting groove 116 is annular in shape, and its shape and size match those of the second limiting piece 114, so that the first limiting groove 116 can be used to secure the second limiting piece 114.

[0070] There can be multiple second limiting pieces 114, for example, one, two, or three. When there are multiple second limiting pieces 114, they need to be spaced apart so that a second limiting groove 117 is formed between the second limiting pieces 114 and the second limiting pieces 114. The second limiting groove 117 is annular in shape, and its shape and size match those of the first limiting piece 113, so that the second limiting groove 117 can be used to secure the first limiting piece 113.

[0071] In some embodiments, the first limiting groove 116 can be formed on a plane of the first limiting piece 113 facing the second limiting piece 114, that is, the first limiting groove 116 is recessed into the first limiting piece 113, and the shape and size of the first limiting groove 116 are adapted to the shape and size of the second limiting piece 114, so that the second limiting piece 114 can be inserted into the first limiting groove 116, thereby enabling the first limiting piece 113 to be fixed to the second limiting piece 114. There can be multiple first limiting grooves 116 located on the first limiting piece 113, and multiple second limiting pieces 114 can be inserted into the first limiting grooves 116.

[0072] In some embodiments, the second limiting groove 117 can be formed on a plane of the second limiting piece 114 facing the first limiting piece 113, that is, the second limiting groove 117 is recessed into the second limiting piece 114, and the shape and size of the second limiting groove 117 are adapted to the shape and size of the second limiting piece 114, so that the first limiting piece 113 can be inserted into the second limiting groove 117, thereby enabling the first limiting piece 113 to be fixed to the second limiting piece 114. The number of second limiting grooves 117 located on the second limiting piece 114 can be multiple, and multiple first limiting pieces 113 can be inserted into the second limiting grooves 117.

[0073] In some embodiments, the number of first limiting pieces 113 located on both sides of the first sealing rib 1111 and the second sealing rib 1121 is different. For example, the number of first limiting pieces 113 located on one side of the first sealing rib 1111 can be 3, and the number of first limiting pieces 113 located on the other side of the first sealing rib 1111 can be 2; the number of second limiting pieces 114 located on one side of the second sealing rib 1121 can be 3, and the number of second limiting pieces 114 located on the other side of the second sealing rib 1121 can be 2.

[0074] See also Figures 4 to 6 In some embodiments, the plurality of first limiting pieces 113 and the plurality of second limiting pieces 114 are arranged alternately.

[0075] In this way, by staggering the first limiting piece 113 and the second limiting piece 114 , the first limiting piece 113 and the second limiting piece 114 can be staggered and abutted during assembly, thereby reducing the thickness of the cylinder head gasket 11 and reducing the space occupied by the cylinder head gasket 11.

[0076] Specifically, when a plurality of first limiting pieces 113 are provided on the first sealing portion 111 and a plurality of second limiting pieces 114 are provided on the second sealing portion 112, it is necessary to stagger the plurality of first limiting pieces 113 and the plurality of second limiting pieces 114. For example, the projections of the first limiting pieces 113 and the second limiting pieces 114 along the thickness direction of the cylinder head gasket 11 can be displayed on the second sealing portion 112 as the projections of the first limiting pieces 113 and the second limiting pieces 114 being nested with each other, that is, the projection of the second limiting piece 114 is located between the projections of the two first limiting pieces 113.

[0077] See also Figures 4 to 9 In some embodiments, the first limiting groove 116 is interference fit with the second limiting piece 114 , and / or the second limiting groove 117 is interference fit with the first limiting piece 113 .

[0078] In this way, by interference fitting the first limiting groove 116 and the second limiting plate 114, and interference fitting the second limiting groove 117 and the first limiting plate 113, a certain pressure can be created between the limiting groove and the limiting plate, so that the two are tightly combined to form a stable connection, and the displacement of the limiting plate in the limiting groove can be limited, thereby preventing the movement between the first sealing part 111 and the second sealing part 112, so that the sealing corrugation will not be over-compressed, thereby improving the fatigue resistance of the sealing corrugation and the sealing performance of the cylinder head gasket 11.

[0079] Specifically, when the first sealing portion 111 and the second sealing portion 112 are assembled, the first limiting piece 113 and the second limiting piece 114 move closer to each other; when the first sealing portion 111 and the second sealing portion 112 are assembled, the first limiting groove 116 and the second limiting piece 114 can be interference-fitted, and the second limiting groove 117 and the first limiting piece 113 can be interference-fitted, so that the first limiting piece 113 and the second limiting piece 114 abut against each other. Therefore, when the first sealing portion 111 and the second sealing portion 112 are squeezed, the first limiting piece 113 and the second limiting piece 114 can limit the corresponding movement of the first sealing portion 111 and the second sealing portion 112.

[0080] The size of the first limiting groove 116 is designed to be slightly smaller than the corresponding size of the second limiting piece 114, and the size of the second limiting groove 117 is designed to be slightly smaller than the corresponding size of the first limiting piece 113. Therefore, during the assembly process, it is necessary to use external force (such as pressure, thermal expansion and contraction, etc.) to squeeze the first sealing portion 111 or the second sealing portion 112, press or install the second limiting piece 114 into the first limiting groove 116, and press or install the first limiting piece 113 into the second limiting groove 117. Furthermore, due to the elastic deformation of the first limiting piece 113 and the second limiting piece 114, when the second limiting piece 114 completely enters the first limiting groove 116 and the first limiting piece 113 completely enters the second limiting groove 117, a certain clamping force or friction force is generated between the two, thereby achieving a tight and stable connection.

[0081] In the description of this specification, the reference terms "certain embodiments", "in an example", "exemplarily", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are 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. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are mutually inconsistent.

[0082] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are optional 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.

Claims

1. A cylinder head gasket, characterized in that: The cylinder head gasket comprises: a first sealing portion; a second sealing portion, wherein the first sealing portion is connected to the second sealing portion; a first limiting piece, the first limiting piece being arranged on a surface of the first sealing portion facing the second sealing portion; A second limiting piece is provided on the surface of the second sealing portion facing the first sealing portion, and the first limiting piece and the second limiting piece abut against each other to limit the corresponding movement of the first sealing portion and the second sealing portion.

2. The cylinder head gasket according to claim 1, characterized in that The cylinder head gasket includes a cylinder port, and the cylinder port is penetrated by the first sealing portion and the second sealing portion along the thickness direction of the cylinder head gasket.

3. The cylinder head gasket according to claim 2, characterized in that The first sealing portion includes a first sealing rib, the first sealing rib surrounds the cylinder port, and the first limiting piece is arranged around the first sealing rib. The second sealing portion includes a second sealing rib, the second sealing rib surrounds the cylinder port, and the second limiting piece is arranged around the second sealing rib.

4. The cylinder head gasket according to claim 2, characterized in that The height and width of the first limiting piece gradually increase along the radial direction of the cylinder port, and the height and width of the second limiting piece gradually increase along the radial direction of the cylinder port.

5. The cylinder head gasket according to claim 4, characterized in that The height of the first limiting piece is greater than or equal to 0.05 mm and less than or equal to 1.5 mm, and the width is greater than or equal to 1 mm and less than or equal to 10 mm; The second limiting piece has a height greater than or equal to 0.05 mm and less than or equal to 1.5 mm, and a width greater than or equal to 1 mm and less than or equal to 10 mm.

6. The cylinder head gasket according to claim 1, wherein: The first limiting piece is welded to the first sealing portion, and the second limiting piece is welded to the second sealing portion.

7. The cylinder head gasket according to claim 1, wherein: A plurality of the first limiting pieces are arranged at intervals to form a first limiting groove for fixing the second limiting piece, and / or a plurality of the second limiting pieces are arranged at intervals to form a second limiting groove for fixing the first limiting piece.

8. The cylinder head gasket according to claim 7, characterized in that The plurality of first limiting pieces and the plurality of second limiting pieces are arranged alternately.

9. The cylinder head gasket according to claim 7, characterized in that The first limiting groove and the second limiting piece are in interference fit, and / or the second limiting groove and the first limiting piece are in interference fit.

10. An engine, characterized in that: The cylinder head gasket comprises the cylinder head gasket according to any one of claims 1 to 9.

11. A vehicle, characterized in that: Including the engine according to claim 10.

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