Cylinder, engine and motorcycle

Abstract

The application relates to a cylinder, an engine and a motorcycle. The cylinder comprises a cylinder head, a cylinder cover and a sealing element. The cylinder head is provided with a first cover surface, the cylinder cover is provided with a second cover surface, and the cylinder cover is arranged on the cylinder head so that the second cover surface covers the first cover surface. The sealing element is arranged between the first cover surface and the second cover surface. The second cover surface or the first cover surface is provided with a stop portion, the sealing element is arranged in a non-closed structure, the stop portion is arranged around the end of the sealing element, and the stop portion is in contact with the opposite first cover surface or second cover surface when the cylinder cover is arranged on the cylinder head. The cylinder, the engine and the motorcycle have the advantages of high reliability and low maintenance cost.

Description

Technical Field

[0001] This application relates to the field of motorcycle technology, and in particular to a cylinder, engine and motorcycle. Background Technology

[0002] After the cylinder head and cylinder cover of a motorcycle engine are assembled together, their sides together form a through hole for connecting other engine components. To prevent coolant leakage, an integral seal is usually installed between the mating surfaces of the cylinder head and cylinder cover.

[0003] However, because the through-hole is formed by splicing two independent components, the cylinder head and cylinder head, the seal must be broken at the through-hole location. The end of the seal near the through-hole cannot extend directly into it, failing to form a continuous and complete closed seal. Therefore, the mating surfaces of the cylinder head and cylinder head on both sides of the through-hole lack seals, easily leading to gaps between these surfaces. During engine operation, coolant can easily leak through these gaps, affecting engine cooling efficiency and, in severe cases, causing engine overheating, cylinder scoring, and other malfunctions, reducing engine reliability and lifespan. Summary of the Invention

[0004] Therefore, it is necessary to provide a cylinder, engine, and motorcycle to address the problem of gaps easily occurring at the mating surfaces where seals are not covered in motorcycle engines.

[0005] This invention provides a cylinder, comprising: The cylinder head is provided with a first cover surface; A cylinder head, wherein the cylinder head is provided with a second mating surface, and the cylinder head is disposed on the cylinder head such that the second mating surface covers the first mating surface; A sealing element is disposed between the first and second mating surfaces. The second or first mating surface has a stop portion. The sealing element is configured as a non-closed structure. The stop portion is disposed around the end of the sealing element. When the cylinder head is placed on the cylinder head, the stop portion fits against the opposite first or second mating surface.

[0006] In one embodiment, the cylinder head has a first groove on the second mating surface, the seal has a first end and a second end near the two ends of the first groove, and the stop portion includes two, one of which is arranged around the first end and the other of which is arranged around the second end.

[0007] In one embodiment, the cylinder head has a second groove on the first cover surface, the second groove is provided through the first cover surface, the stop portion has a first contact surface, the first contact surface is provided protruding from the second cover surface, and the first contact surface abuts against the two ends of the first cover surface near the second groove.

[0008] In one embodiment, the cylinder further includes a sealant disposed between the first mating surface and the first cover surface.

[0009] In one embodiment, the cylinder head is further provided with a bolt seat, the bolt seat is provided with a second mating surface, the second mating surface is used to mate with the first cover surface, the bolt seat is provided with a first mounting hole, the cylinder head is provided with a second mounting hole, and the first mounting hole and the second mounting hole are used for fasteners to pass through.

[0010] In one embodiment, the first bonding surface is connected to the second bonding surface, and the first bonding surface and the second bonding surface are disposed on the same plane.

[0011] In one embodiment, the bolt seat and the stop portion are integrally machined.

[0012] In one embodiment, the second or first cover surface is further provided with a mounting groove, the seal is installed in the mounting groove, the mounting groove is configured as a non-closed structure, and the stop portion is arranged around the end of the mounting groove.

[0013] The present invention also provides an engine comprising the cylinder of the above embodiments.

[0014] The present invention also provides a motorcycle including the engine of the above embodiments.

[0015] In the aforementioned cylinders, engines, and motorcycles, because the seals are non-closed structures, the area outside the seal's end cannot be fitted with a seal when the first and second cover surfaces are closed. By providing a circumferential stop at the end of the seal, when the cylinder head and cylinder head are assembled, the stop fits tightly with the opposing first or second cover surface, effectively filling the gap between the first and second cover surfaces outside the seal's end. This solves the leakage problem caused by the seal not being located outside the end. It does not require changing the original overall structure and assembly process of the cylinder head and cylinder head; it can be achieved simply by adding a stop to the first or second cover surface. This results in low processing costs, ease of implementation, and ensures the overall sealing performance of the cylinder head and cylinder head, improving the cylinder's reliability and service life, and reducing maintenance costs. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the cylinder structure described in an embodiment of this application.

[0017] Figure 2 This is an exploded view of the cylinder described in an embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the cylinder head structure of the cylinder described in the embodiment of this application.

[0019] Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.

[0020] Figure 5 This is a schematic diagram of the cylinder head structure of the cylinder described in the embodiments of this application.

[0021] Figure 6 This is a schematic diagram showing the machining allowance of the cylinder head of the cylinder described in the embodiments of this application.

[0022] Figure 7 This is a schematic diagram of the engine structure described in an embodiment of this application.

[0023] Icon labels: 10. Cylinder; 20. Water pump; 100. Cylinder head; 110. First mating surface; 111. Second mounting hole; 120. Second groove; 200, Cylinder head; 210, Second mating surface; 211, Mounting groove; 220, Stop; 221, First mating surface; 230, First groove; 240, Bolt seat; 241, Second mating surface; 242, First mounting hole; 300, Seal; 310, First end; 320, Second end; 400, Sealant. Detailed Implementation

[0024] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0025] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0030] See Figures 1 to 4 The diagram shows a schematic of the structure of a cylinder 10 in one embodiment of the present application. The cylinder 10 includes a cylinder head 100, a cylinder cover 200 and a seal 300. The cylinder head 100 is provided with a first cover surface 110 and the cylinder cover 200 is provided with a second cover surface 210. The cylinder cover 200 covers the cylinder head 100 so that the second cover surface 210 covers the first cover surface 110.

[0031] A seal 300 is disposed between a first cover surface 110 and a second cover surface 210. The second cover surface 210 or the first cover surface 110 has a stop portion 220. The seal 300 is configured as a non-closed structure, therefore, the seal 300 has two ends. The stop portion 220 is disposed around the ends of the seal 300. When the cylinder head 200 is placed on the cylinder head 100, the stop portion 220 fits against the opposing first cover surface 110 or second cover surface 210.

[0032] In an optional embodiment, the second cover surface 210 or the first cover surface 110 is further provided with a mounting groove 211, the seal 300 is installed in the mounting groove 211, the mounting groove 211 is configured as a non-closed structure, and the stop portion 220 is arranged around the end of the mounting groove 211.

[0033] In one embodiment, both the mounting groove 211 and the stop portion 220 are disposed on the second cover surface 210. When the cylinder head 200 is placed on the cylinder head 100, the stop portion 220 fits against the first cover surface 110. In other embodiments, the stop portion 220 and the mounting groove 211 may also be disposed on the first cover surface 110 and the second cover surface 210, respectively.

[0034] It should be noted that both the mounting groove 211 and the seal 300 are non-closed structures. Specifically, they are "non-closed" in the circumferential direction around the central axis of the cylinder 10. For example, if a point on the seal 300 is selected as the starting point, and the object moves along the circumferential direction around the central axis of the cylinder 10 on the seal 300, it cannot return to the starting point.

[0035] In the cylinder 10 described in this application embodiment, since the seal 300 is a non-closed structure, the area outside the end of the seal 300 cannot be fitted with the seal 300 when the first cover surface 110 and the second cover surface 210 are closed. By providing a surrounding stop portion 220 at the end of the seal 300, when the cylinder head 200 and the cylinder head 100 are assembled, the stop portion 220 fits tightly with the opposite first cover surface 110 or second cover surface 210, effectively filling the gap between the first cover surface 110 and the second cover surface 210 outside the end of the seal 300, and solving the leakage problem caused by the seal 300 not being set in the area outside the end.

[0036] The cylinder 10 described in this application embodiment can be achieved by providing a surrounding stop portion 220 at the end of the sealing member 300. This eliminates the need to change the overall structure and assembly process of the original cylinder head 100 and cylinder cover 200. It can be achieved simply by adding a stop portion 220 to the first cover surface 110 or the second cover surface 210. This reduces processing costs and is easy to implement. At the same time, it ensures the overall sealing performance of the cylinder head 100 and cylinder cover 200, improves the reliability and service life of the cylinder 10, and reduces maintenance costs.

[0037] In some embodiments, such as Figure 3 As shown, the cylinder head 200 has a first groove 230 on the second mating surface 210, and the cylinder head 100 has a second groove 120 on the first mating surface 110. When the cylinder head 200 is placed on the cylinder head 100, the first groove 230 and the second groove 120 combine to form a through hole, which can be used to install the water pump 20. That is to say, the first mating surface 110 and the second mating surface 210 will be disconnected at the position of the through hole, and the first mating surface 110 and the second mating surface 210 will not form a closed and complete connection outline, which means that the mounting groove 211 and the seal 300 cannot form a complete closed ring.

[0038] In an optional embodiment, such as Figure 3 As shown, the seal 300 has a first end 310 and a second end 320 at its two ends near the first groove 230, and the stop portion 220 includes two parts, one of which is arranged around the first end 310 and the other of which is arranged around the second end 320.

[0039] Because the second mating surface 210 is provided with a first groove, the seal 300 is broken near the first groove. The seal 300 forms a first end 310 and a second end 320 on both sides. In this embodiment, by providing independently surrounding stop portions 220 on the first end 310 and the second end 320 respectively, when the cylinder head 200 and cylinder head 100 are assembled, the two stop portions 220 simultaneously and tightly fit with the first mating surface 110 of the cylinder head 100, forming independent sealing envelopes and end face seals for the first end 310 and the second end 320 of the seal 300, completely preventing coolant from seeping out from the gaps in the mating surfaces outside the two ends of the seal 300. The two stop portions 220, each surrounding the corresponding first end 310 and second end 320, can precisely adapt to the shape and position of the two ends of the seal 300, improving the reliability of the seal and increasing the stability and service life of the cylinder 10.

[0040] In an optional embodiment, such as Figure 3 and Figure 4 As shown, the stop portion 220 is provided with a first contact surface 221, which protrudes from the second cover surface 210 and abuts against the two ends of the first cover surface 110 near the second groove 120.

[0041] In this embodiment, a first contact surface 221 protruding from the second cover surface 210 is provided in the stop portion 220. When the cylinder head 200 and cylinder head 100 are assembled together, the first contact surface 221 precisely abuts against the two ends of the first cover surface 110 near the second groove. The stop portion 220 can not only effectively compensate for the small flatness error and assembly gap between the cylinder head 100 and cylinder head 200 through the protruding design, but also ensure that the stop portion 220 and cylinder head 100 form a tight and gapless hard seal, thereby directly sealing the leakage gap between the two disconnected ends of the seal 300 and the through hole splice. No additional sealing element is required, the processing technology is simple, the sealing reliability and operational stability of the cylinder 10 are significantly improved, and the service life of the cylinder 10 is extended.

[0042] In an exemplary embodiment, the flatness of the first mating surface 221 is ≤0.02mm / 100mm, and the surface roughness is Ra1.6~3.2μm.

[0043] Combination Figure 5 The diagram shows a schematic representation of the cylinder head 100 of a cylinder according to one embodiment of this application. In an optional embodiment, the cylinder 10 further includes a sealant 400 disposed between the first mating surface 221 and the first cover surface 110. Figure 4 The area covered by the sealant 400 is the area of ​​the first mating surface 221, that is, it is set around the end of the sealant 300.

[0044] In this embodiment, a sealant 400 is applied between the first mating surface and the first cover surface. The sealant 400 effectively fills the microscopic gaps between the first mating surface and the first cover surface caused by machining accuracy, surface roughness, and assembly errors, compensating for the inability of a single hard seal to completely seal these tiny gaps. Simultaneously, the sealant 400 has good elasticity and adhesion, adapting to vibrations, thermal expansion and contraction, and stress deformation generated during cylinder 10 operation, maintaining a tight seal at the interface and preventing coolant leakage due to minor separation of the hard seal surface.

[0045] Specifically, this embodiment does not require any changes to the original structure and processing technology of the cylinder head and cylinder cover. It can be achieved simply by adding an adhesive application step in the assembly process. The implementation cost is extremely low and the operation is simple. It further enhances the sealing reliability of the cylinder head and cylinder cover mating surfaces, significantly improves the long-term operational stability of the cylinder 10, and reduces the frequency and cost of subsequent maintenance.

[0046] In an optional embodiment, such as Figure 3 and Figure 5 As shown, the cylinder head 200 also has a bolt seat 240, which has a second mating surface 241 for mating with the first cover surface 110. The bolt seat 240 has a first mounting hole 242, and the cylinder head 100 has a second mounting hole 111. The first mounting hole 242 and the second mounting hole 111 are for fasteners to pass through. For example, the fastener is a bolt or a screw.

[0047] In this embodiment, a bolt seat 240 is provided on the cylinder head 200, and a second mounting hole 111 is opened at the corresponding position on the cylinder head 100. When the cylinder head 200 and the cylinder head 100 are assembled together, the second mating surface 241 of the bolt seat 240 is tightly fitted with the first mating surface 110 of the cylinder head 100. Fasteners pass through the first mounting hole 242 and the second mounting hole 111 to fasten the cylinder head 100 and the cylinder head 200, ensuring the bonding pressure and tightness between the cylinder head 200 and the cylinder head 100.

[0048] In an optional embodiment, such as Figure 6 As shown, the first bonding surface 221 is connected to the second bonding surface 241, and the first bonding surface 221 and the second bonding surface 241 are disposed on the same plane. Wherein, Figure 6 The diagonal area in the figure represents the machining allowance between the first bonding surface 221 and the second bonding surface 241.

[0049] This embodiment connects the first mating surface of the stop portion and the second mating surface of the bolt seat to form a coplanar plane. Firstly, at the machining level, it achieves simultaneous clamping and machining of the first and second mating surfaces, effectively ensuring the flatness and height consistency of the two surfaces, eliminating the cumulative errors caused by separate machining, significantly improving machining accuracy and reducing manufacturing costs. Secondly, the continuous mating surface connecting the first and second mating surfaces eliminates the splicing gap between the stop portion and the bolt seat, forming a continuous hard sealing barrier. This, together with the sealant 400, creates a more robust and synergistic sealing effect, further improving the sealing reliability and operational stability of the cylinder 10.

[0050] In an optional embodiment, such as Figure 6 As shown, the bolt seat 240 and the stop portion 220 are integrally machined.

[0051] This embodiment designs the bolt seat 240 and the stop portion 220 as an integrally formed structure, eliminating the need for multiple clamping and processing of the cylinder head 200. This significantly reduces production steps, effectively improves processing efficiency, and lowers manufacturing costs. At the same time, the simultaneous clamping and processing eliminates the dimensional accumulation errors caused by separate processing, ensuring the flatness accuracy and height consistency of the first mating surface 221 and the second mating surface 241. This lays a solid foundation for the tight fit between the cylinder head 200 and the cylinder head 100, and improves the sealing performance and operational durability of the cylinder 10.

[0052] On the other hand, embodiments of this application also provide an engine, such as Figure 7 As shown, it includes a water pump 20 and a cylinder 10 as described in any of the above embodiments, with the water pump 20 installed on the cylinder 10.

[0053] In one exemplary embodiment, such as Figure 1 and Figure 2 As shown, the cylinder head 100 has a first sub-mounting seat on the side of the second groove 120, and the cylinder cover 200 has a second sub-mounting seat on the side of the first groove 230. When the cylinder head 100 is placed on the cylinder cover 200, the first sub-mounting seat and the second sub-mounting seat combine to form a water pump 20 mounting seat. The water pump 20 mounting seat has a through hole formed by the first groove 230 and the second groove 120, and the water pump 20 mounting seat is used to install the water pump 20. That is to say, the first cover surface 110 and the second cover surface 210 will be disconnected at the position of the first groove 230 and the second groove 120. The first cover surface 110 and the second cover surface 210 do not form a closed and complete connection outline, which means that the seal 300 and the seal 300 cannot form a completely closed sealing ring.

[0054] In the engine described in this embodiment, because the seal 300 is a non-closed structure, the area outside the end of the seal 300 cannot be fitted with the seal 300 when the first cover surface 110 and the second cover surface 210 are closed. By providing a surrounding stop portion 220 at the end of the seal 300, when the cylinder head 200 and the cylinder head 100 are assembled, the stop portion 220 fits tightly with the opposite first cover surface 110 or second cover surface 210, effectively filling the gap between the first cover surface 110 and the second cover surface 210 outside the end of the seal 300. There is no need to change the original overall structure and assembly process of the cylinder head 100 and the cylinder head 200. It can be achieved simply by adding the stop portion 220 to the first cover surface 110 or the second cover surface 210. The processing cost is low and the implementation is convenient. At the same time, it ensures the overall sealing performance of the cylinder head 100 and the cylinder head 200, improves the reliability and service life of the cylinder 10, and reduces maintenance costs.

[0055] On the other hand, this application also provides a motorcycle, including the engine described in the above embodiments.

[0056] In the motorcycle described in this embodiment, because the seal 300 is a non-closed structure, the area outside the end of the seal 300 cannot be fitted with the seal 300 when the first cover surface 110 and the second cover surface 210 are closed. By providing a surrounding stop portion 220 at the end of the seal 300, when the cylinder head 200 and the cylinder head 100 are assembled, the stop portion 220 fits tightly with the opposite first cover surface 110 or second cover surface 210, effectively filling the gap between the first cover surface 110 and the second cover surface 210 outside the end of the seal 300. There is no need to change the original overall structure and assembly process of the cylinder head 100 and the cylinder head 200. It can be achieved simply by adding the stop portion 220 to the first cover surface 110 or the second cover surface 210. The processing cost is low and the implementation is convenient. At the same time, it ensures the overall sealing performance of the cylinder head 100 and the cylinder head 200, improves the reliability and service life of the cylinder 10, and reduces maintenance costs.

[0057] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0058] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A cylinder (10), characterized in that, include: Cylinder head (100), wherein the cylinder head (100) is provided with a first cover surface (110); Cylinder head (200), the cylinder head (200) is provided with a second cover surface (210), the cylinder head (200) is covered on the cylinder head (100) so that the second cover surface (210) covers the first cover surface (110); A sealing element (300) is disposed between the first cover surface (110) and the second cover surface (210). The second cover surface (210) or the first cover surface (110) is provided with a stop portion (220). The sealing element (300) is configured as a non-closed structure. The stop portion (220) is disposed around the end of the sealing element (300). When the cylinder head (200) is placed on the cylinder head (100), the stop portion (220) fits against the opposite first cover surface (110) or second cover surface (210).

2. The cylinder (10) according to claim 1, characterized in that: The cylinder head (200) has a first groove (230) on the second mating surface (210). The sealing member (300) has a first end (310) and a second end (320) near the two ends of the first groove (230). The stop portion (220) includes two parts, one of which is arranged around the first end (310), and the other is arranged around the second end (320).

3. The cylinder (10) according to claim 2, characterized in that: The cylinder head (100) has a second groove (120) on the first cover surface (110), the second groove (120) penetrates the first cover surface (110), and the stop portion (220) has a first contact surface (221), the first contact surface (221) protrudes from the second cover surface (210), and the first contact surface (221) abuts against the two ends of the first cover surface (110) near the second groove (120).

4. The cylinder (10) according to claim 3, characterized in that: The cylinder (10) also includes a sealant (400) disposed between the first mating surface (221) and the first cover surface (110).

5. The cylinder (10) according to claim 3, characterized in that: The cylinder head (200) is also provided with a bolt seat (240), the bolt seat (240) is provided with a second mating surface (241), the second mating surface (241) is used to mate with the first cover surface (110), the bolt seat (240) is provided with a first mounting hole (242), the cylinder head (100) is provided with a second mounting hole (111), the first mounting hole (242) and the second mounting hole (111) are used for fasteners to pass through.

6. The cylinder (10) according to claim 5, characterized in that: The first bonding surface (221) is connected to the second bonding surface (241), and the first bonding surface (221) and the second bonding surface (241) are disposed on the same plane.

7. The cylinder (10) according to claim 5, characterized in that: The bolt seat (240) and the stop portion (220) are integrally machined.

8. The cylinder (10) according to any one of claims 1-7, characterized in that: The second cover surface (210) or the first cover surface (110) is further provided with a mounting groove (211), the sealing element (300) is installed in the mounting groove (211), the mounting groove (211) is configured as a non-closed structure, and the stop portion (220) is arranged around the end of the mounting groove (211).

9. An engine, characterized in that: Includes the cylinder (10) as described in any one of claims 1-8.

10. A motorcycle, characterized in that: Includes the engine as described in claim 9.

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