Water pump mounting structure, engine and motorcycle

Abstract

This application relates to a water pump mounting structure, an engine, and a motorcycle, including a water pump body, a seal, and a cylinder head. The water pump body has a mating portion; the seal is disposed in the mating portion; the cylinder head includes a cylinder head cover and a cylinder head body, the cylinder head cover being assembled to the cylinder head body, the cylinder head cover having a mating portion for mating with the mating portion, the mating portion having a pressing surface, at least a portion of the pressing surface forming an angle with the assembly direction of the cylinder head cover, the pressing surface pressing against the seal. Compared with conventional technology, the above-described water pump mounting structure can prevent the cylinder head cover from scratching or cutting the seal during the assembly process with the cylinder head body, ensuring the structural integrity of the seal, thereby improving the overall operational stability of the engine.

Description

Technical Field

[0001] This application relates to the technical field of motorcycles, and in particular to a water pump mounting structure, an engine, and a motorcycle. Background Technology

[0002] The water pump is a core heat exchange component of the engine, primarily used to drive the circulation of coolant within the engine. The engine cylinder head has pre-drilled mounting holes through which the water pump is fixedly mounted. Relying on the continuous circulation of coolant, the water pump removes the heat generated by the cylinder head and other engine components during operation, thus ensuring stable engine operation within a reasonable temperature range.

[0003] To ensure a proper seal at the junction of the cylinder head and water pump, traditional technology typically involves installing a sealing ring at this junction to prevent coolant leakage. However, during the assembly of the water pump and cylinder head, the sealing ring is easily damaged by the edge of the cylinder head, which compromises its structural integrity. This leads to a decrease in the sealing performance at the junction of the water pump and cylinder head, ultimately affecting the engine's operational stability. Summary of the Invention

[0004] Therefore, it is necessary to address the problem that the sealing ring is easily damaged during the assembly of the water pump and cylinder head in traditional technologies, which affects the operating stability of the engine, and to provide a water pump mounting structure, engine, and motorcycle.

[0005] The technical solution is as follows:

[0006] One embodiment provides a water pump mounting structure, including:

[0007] The water pump body is provided with a docking part;

[0008] A sealing element is disposed at the mating portion;

[0009] A cylinder head, comprising a cylinder head cover and a cylinder head body, wherein the cylinder head cover is assembled to the cylinder head body, the cylinder head cover is provided with a mating part for mating with the docking part, the mating part has a pressing surface, at least a portion of the pressing surface is at an angle to the assembly direction of the cylinder head cover, and the pressing surface presses against the seal.

[0010] In the aforementioned water pump mounting structure, the docking part of the water pump body is used to dock with the mating part of the cylinder head cover. Since at least a portion of the extrusion surface of the mating part forms an angle with the assembly direction of the cylinder head cover and the cylinder head body, the inclined extrusion surface can gradually and gently extrude the seals during the assembly process of the cylinder head cover and the cylinder head body, effectively preventing the mating part from scratching or cutting the seals and preventing damage to the seals. Compared with traditional technology, the above-mentioned water pump mounting structure can prevent the cylinder head cover from scratching or cutting the seals during the assembly process with the cylinder head body, ensuring the structural integrity of the seals and thus improving the overall operating stability of the engine.

[0011] In one embodiment, the mating portion has an installation groove, and the sealing element is disposed in the installation groove.

[0012] In one embodiment, the groove of the mounting groove is opened along the direction of the mating portion toward the fitting portion, and at least a portion of the seal protrudes outside the groove of the mounting groove and is used for compression by the extrusion surface.

[0013] In one embodiment, the width of the extrusion surface along the direction from the mating portion toward the fitting portion is defined as W, and the height of the portion of the seal protruding from the mounting groove is defined as H, where W > H.

[0014] In one embodiment, the mating part has a mating surface on one side along the assembly direction, and a first transition area is provided at the junction of the extrusion surface and the mating surface, the first transition area being an outwardly convex arc surface.

[0015] In one embodiment, the mating part has a sealing surface on the side facing the mating part, the sealing surface being located on the side of the extrusion surface away from the assembly surface, and the sealing surface being used to seal with the sealing element after the cylinder head cover and the cylinder head body are assembled.

[0016] In one embodiment, a second transition region is provided at the junction of the extrusion surface and the sealing surface, and the second transition region is an outwardly convex arc surface.

[0017] In one embodiment, the seal has a mating surface that is an outwardly convex arc surface and is used to be pressed by the extrusion surface.

[0018] Another embodiment provides an engine that includes the water pump mounting structure as described above.

[0019] In the aforementioned engine, the water pump body's mating portion is used to mate with the cylinder head cover's mating portion. Since at least a portion of the mating portion's extrusion surface forms an angle with the assembly direction of the cylinder head cover and cylinder head body, during the assembly process of the cylinder head cover and cylinder head body, the inclined extrusion surface can gradually and gently extrude the seals, effectively preventing the mating portion from scraping or cutting the seals and preventing damage to the seals. Compared with traditional technologies, the aforementioned engine can prevent the cylinder head cover from scraping or cutting the seals during the assembly process with the cylinder head body, ensuring the structural integrity of the seals and thus improving the overall operational stability of the engine.

[0020] Another embodiment provides a motorcycle that includes an engine as described above.

[0021] In the aforementioned motorcycle, the docking part of the water pump body is used to dock with the mating part of the cylinder head cover. Since at least a portion of the extrusion surface of the mating part forms an angle with the assembly direction of the cylinder head cover and the cylinder head body, the inclined extrusion surface can gradually and gently extrude the seal during the assembly process of the cylinder head cover and the cylinder head body, effectively preventing the mating part from scratching or cutting the seal and preventing damage to the seal. Compared with traditional technology, the aforementioned motorcycle can avoid the cylinder head cover scratching or cutting the seal during the assembly process with the cylinder head body, ensuring the structural integrity of the seal and thus improving the overall operating stability of the engine. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the cylinder head cover in one embodiment of this application.

[0024] Figure 2 This is a structural schematic diagram of the cylinder head cover from another angle in one embodiment of this application.

[0025] Figure 3 This is a top view of the cylinder head cover in one embodiment of this application.

[0026] Figure 4 for Figure 3 A schematic diagram of the structure of section AA in the middle.

[0027] Figure 5 for Figure 4 A magnified view of a section at point B.

[0028] Figure 6This is a schematic diagram of the fit between the seal and the extrusion surface in one embodiment of this application.

[0029] Attached image annotations:

[0030] 100. Connecting part; 110. Mounting groove; 200. Seal; 210. Mating surface; 300. Cylinder head cover; 310. Mating part; 311. Extrusion surface; 312. Assembly surface; 313. First transition area; 314. Sealing surface; 315. Second transition area; 320. Oil-gas separation structure; 330. Vent plate sealing gasket; 340. Vent plate; 350. Screw; 360. Vent port. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Please see Figure 1 , Figures 3 to 5 One embodiment of this application provides a water pump mounting structure, including a water pump body, a seal 200, and a cylinder head. The water pump body is provided with a docking portion 100; the seal 200 is provided in the docking portion 100; the cylinder head includes a cylinder head cover 300 and a cylinder head body (not shown in the figure), the cylinder head cover 300 is assembled to the cylinder head body, the cylinder head cover 300 is provided with a mating portion 310, the mating portion 310 is used to mate with the docking portion 100, the mating portion 310 has a pressing surface 311, at least a portion of the pressing surface 311 is at an angle to the assembly direction of the cylinder head cover 300, and the pressing surface 311 presses the seal 200.

[0038] In the aforementioned water pump mounting structure, the docking portion 100 of the water pump body is used to dock with the mating portion 310 of the cylinder head cover 300. Since at least a portion of the pressing surface 311 of the mating portion 310 forms an angle with the assembly direction of the cylinder head cover 300 and the cylinder head body, during the assembly process of the cylinder head cover 300 and the cylinder head body, the inclined pressing surface 311 can gradually and gently press the seal 200, effectively preventing the mating portion 310 from scraping or cutting the seal 200 and preventing damage to the seal 200. Compared with conventional technology, the aforementioned water pump mounting structure can prevent the cylinder head cover 300 from scraping or cutting the seal 200 during the assembly process with the cylinder head body, ensuring the structural integrity of the seal 200 and thus improving the overall operating stability of the engine.

[0039] For illustrative purposes, in the above embodiments, the assembly direction of the cylinder head cover 300 refers to the feed direction in which the cylinder head cover 300 is assembled and pressed towards the cylinder head body, and can also be understood as the thickness direction of the cylinder head cover 300. Figures 4 to 6 The C direction in the equation will not be elaborated upon here.

[0040] Furthermore, at least a portion of the extrusion surface 311 forms an angle with the assembly direction to extrude the seal 200 during the assembly process of the cylinder head cover 300 and the cylinder head body. When the cylinder head cover 300 is assembled with the cylinder head body along the assembly direction, the extrusion surface 311 of the mating part 310 can gradually and gently extrude the seal 200 to avoid scratching the seal 200 and causing damage.

[0041] As an explanation, the fact that at least a portion of the extrusion surface 311 forms an angle with the assembly direction means that at least a portion of the extrusion surface 311 is arranged at an angle relative to the assembly direction; the inclined area can be either a plane or a curved surface. Understandably, when the inclined area is a curved surface structure, the tangents at each point of the curved surface form an angle with the assembly direction.

[0042] Furthermore, normally, before installing the water pump body, the cylinder head cover 300 needs to be assembled with the cylinder head body to prevent the cylinder head cover 300 from scratching or cutting the seal 200 on the water pump body; after the cylinder head cover 300 and the cylinder head body are assembled, the water pump body is then installed on the cylinder head, which is a complicated process. In this embodiment, by providing an inclined pressing surface 311 on the mating part 310, it is possible to prevent the cylinder head cover 300 from scratching or cutting the seal 200 during the assembly process with the cylinder head body, eliminating the need to assemble the cylinder head cover 300 and the cylinder head body before installing the water pump body, thus improving assembly convenience.

[0043] Furthermore, the cylinder head cover 300 is assembled with the cylinder head body to form a cylinder head. The mating part 310 of the cylinder head cover 300 can form an assembly hole with at least a portion of the cylinder head body. The assembly hole is used to mate with the docking part 100 of the water pump body so that the water pump body can pump coolant into the cylinder head and remove the heat generated by the operation of the various working parts of the engine.

[0044] Optionally, the assembly hole formed by the mating part 310 and the cylinder head body can be a slit-shaped hole, a round hole, or a hole of other shapes; no specific limitation is made here.

[0045] Optionally, the mating part 100 is configured as a component that can match the mounting hole of the cylinder head, such as a mating boss, a mating shaft, etc., without specific limitations.

[0046] Optionally, the seal 200 can be a sealing ring, sealing gasket, etc. provided on the mating part 100. As long as it can be squeezed and fitted with the mating part 310 of the cylinder head cover 300 when the cylinder head cover 300 is assembled with the cylinder head body, and finally achieves a seal, no specific limitation is made here.

[0047] In one embodiment, the mating part 310 is located on the side of the cylinder head cover 300 away from the spark plug side.

[0048] Please see Figure 5 In one embodiment, the docking part 100 is provided with a mounting groove 110, and the sealing element 200 is disposed in the mounting groove 110.

[0049] By opening an installation groove 110 in the docking part 100 of the water pump body and placing the seal 200 in the installation groove 110, a reliable limiting constraint can be formed on the seal 200, preventing the seal 200 from shifting, loosening or misaligning during the assembly or use of the cylinder head cover 300 and the cylinder head body. At the same time, it avoids the sealing surface 311 of the mating part 310 from squeezing the seal 200 and causing it to fall out of the installation groove 110, thereby improving the overall sealing reliability of the water pump installation structure.

[0050] Please see Figure 5 In one embodiment, the groove of the mounting groove 110 is opened along the mating portion 100 toward the fitting portion 310, and at least a portion of the seal 200 protrudes outside the groove of the mounting groove 110 and is used for compression by the extrusion surface 311.

[0051] The groove of the mounting groove 110 is opened towards the mating part 310. At least a portion of the seal 200 protrudes from the groove of the mounting groove 110 so that the extrusion surface 311 can form a stable contact extrusion on the seal 200. This not only limits the position of the seal 200 through the mounting groove 110 to prevent the seal 200 from shifting or falling off, but also avoids uneven extrusion of the seal 200 when the cylinder head cover 300 is assembled with the cylinder head body, preventing the seal 200 from being scratched or cut and damaged, and improving the smoothness of assembly.

[0052] Furthermore, the outline shape of the mounting groove 110 is adapted to the shape of the seal 200. For example, when the seal 200 is an annular structure, the mounting groove 110 is correspondingly set as an annular groove; when the seal 200 is a strip-shaped sealing gasket, the mounting groove 110 is matched and set as a strip-shaped groove, which will not be elaborated here.

[0053] Please see Figure 5 and Figure 6 In one embodiment, the width of the extrusion surface 311 along the direction from the mating portion 100 toward the fitting portion 310 is defined as W, and the height of the portion of the seal 200 protruding from the mounting groove 110 is defined as H, where W > H.

[0054] This configuration ensures that the pressing surface 311 can completely cover the part of the seal 200 that protrudes from the mounting groove 110, preventing the edge of the pressing surface 311 from scratching the seal 200, ensuring that the seal 200 is subjected to pressure evenly, avoiding assembly damage, and improving assembly smoothness.

[0055] Furthermore, the projection of the extrusion surface 311 toward the assembly direction covers the projection of the portion of the seal 200 protruding from the mounting groove 110 toward the assembly direction, so as to ensure that the extrusion surface 311 can completely cover the portion of the seal 200 protruding from the mounting groove 110 during the assembly process, so that when the mating part 310 contacts the seal 200, the extrusion surface 311 can simultaneously apply a squeezing action to the seal 200.

[0056] Please see Figure 5 and Figure 6 In one embodiment, the extrusion surface 311 is a plane, and the angle between the extrusion surface 311 and the assembly direction is less than 30°.

[0057] This design allows the extrusion surface 311 to form a gently sloping surface, avoiding excessive deformation of the seal 200 during the extrusion process due to an excessively large tilt angle. This ensures a smooth transition of force during assembly, thereby extending the service life of the seal 200.

[0058] Please see Figure 5 and Figure 6In one embodiment, the mating part 310 has a mating surface 312 on one side along the assembly direction, and a first transition region 313 is provided at the junction of the extrusion surface 311 and the mating surface 312. The first transition region 313 is an outwardly convex arc surface.

[0059] The first transition area 313 can eliminate the sharp edges between the assembly surface 312 and the extrusion surface 311, thereby achieving a smooth transition between the assembly surface 312 and the extrusion surface 311. During the assembly process of the cylinder head cover 300 and the cylinder head body, the first transition area 313 can guide the seal 200, avoid the hard edges from scratching the seal 200, make the pressure deformation process of the seal 200 more gradual, and effectively prevent the seal 200 from being damaged or cracked.

[0060] Furthermore, the assembly surface 312 is spaced apart from the cylinder head body to form an assembly hole, and the assembly surface 312 and the extrusion surface 311 are smoothly transitioned through the first transition area 313 to avoid hard edges between the assembly surface 312 and the extrusion surface 311, which would cause scratches to the seal 200 during the assembly process.

[0061] Please see Figure 5 and Figure 6 In one embodiment, the mating part 310 has a sealing surface 314 on the side facing the mating part 100. The sealing surface 314 is located on the side of the extrusion surface 311 away from the assembly surface 312. The sealing surface 314 is used to seal with the seal 200 after the cylinder head cover 300 and the cylinder head body are assembled.

[0062] The compression surface 311 is used to gradually compress the seal 200 during assembly, preventing scratch damage to the seal 200. After assembly, the sealing surface 314 then fits against the seal 200, thereby achieving a sealing fit between the pump body and the cylinder head. This design not only avoids damage to the seal 200 during assembly but also ensures a tight fit between the seal 200 and the sealing surface 314 after assembly, ensuring reliable sealing and effectively preventing leakage of the cooling medium.

[0063] Further, please refer to Figure 5 and Figure 6 The sealing surface 314 is parallel to the assembly direction. After the cylinder head cover 300 and the cylinder head body are assembled, the sealing element 200 slides from the extrusion surface 311 to the sealing surface 314 to ensure sealing reliability.

[0064] Please see Figure 5 and Figure 6 In one embodiment, a second transition region 315 is provided at the junction of the extrusion surface 311 and the sealing surface 314, and the second transition region 315 is a convex arc surface.

[0065] This design enables a smooth transition between the sealing surface 314 and the pressing surface 311, eliminating the sharp edges between them. During the assembly of the cylinder head cover 300 and the cylinder head body, the second transition area 315 prevents hard edges from scratching and cutting the seal 200, reducing the risk of damage to the seal 200.

[0066] Furthermore, one side of the extrusion surface 311 smoothly transitions to the assembly surface 312 through the first transition area 313, and the other side of the extrusion surface 311 smoothly transitions to the sealing surface 314 through the second transition area 315. In this way, during the assembly process of the cylinder head cover 300 and the cylinder head body, hard edges can be prevented from scratching and cutting the seal 200, reducing the risk of damage to the seal 200.

[0067] Please see Figure 5 and Figure 6 In one embodiment, the seal 200 has a mating surface 210, which is an outwardly convex arc surface and is used for compression by the extrusion surface 311.

[0068] Setting the mating surface 210 as an outwardly convex arc surface allows for smoother contact with the extrusion surface 311, reducing scraping between the seal 200 and the extrusion surface 311. At the same time, the outwardly convex arc surface structure can effectively disperse the extrusion force, making the seal 200 pressurized evenly and avoiding local stress concentration that could damage the seal 200.

[0069] Further, please refer to Figure 5 and Figure 6 The seal 200 is circular or nearly circular in shape, and its outer wall is a convex arc surface structure to ensure that the seal 200 is subjected to uniform pressure and to prevent damage to the seal 200.

[0070] Please see Figure 3 In one embodiment, the cylinder head cover 300 is provided with an oil-gas separation structure 320 to separate the oil mist and fine oil droplets mixed in the blow-by gas from the gas, so as to prevent the oil from being discharged with the exhaust gas.

[0071] Another embodiment provides an engine that includes the water pump mounting structure as described above.

[0072] In the aforementioned engine, the docking portion 100 of the water pump body is used to dock with the mating portion 310 of the cylinder head cover 300. Since at least a portion of the pressing surface 311 of the mating portion 310 forms an angle with the assembly direction of the cylinder head cover 300 and the cylinder head body, during the assembly process of the cylinder head cover 300 and the cylinder head body, the inclined pressing surface 311 can gradually and gently press the seal 200, effectively preventing the mating portion 310 from scratching or cutting the seal 200 and preventing damage to the seal 200. Compared with conventional technology, the engine described above can avoid the cylinder head cover 300 from scratching or cutting the seal 200 during the assembly process with the cylinder head body, ensuring the structural integrity of the seal 200 and thus improving the overall operating stability of the engine.

[0073] Furthermore, the water pump body is used to pump coolant to the engine to cool various engine components. The coolant circulation continuously removes the large amount of heat generated by the cylinder head and various working parts of the engine during operation, thereby ensuring that the engine operates stably within a reasonable temperature range.

[0074] Please see Figure 1 In one embodiment, the engine further includes a vent gasket 330 and a vent 340, which sequentially cover the oil-gas separation structure 320 to seal the oil-gas separation structure 320 and ensure the oil-gas separation effect.

[0075] Furthermore, the vent gasket 330 and the vent 340 are fixed to the oil-gas separation structure 320 by screws 350.

[0076] Please see Figures 1 to 3 In one embodiment, the cylinder head cover 300 is also provided with a vent 360 to discharge exhaust gas and high-pressure gas through the vent 360.

[0077] Another embodiment provides a motorcycle that includes an engine as described above.

[0078] In the aforementioned motorcycle, the docking portion 100 of the water pump body is used to dock with the mating portion 310 of the cylinder head cover 300. Since at least a portion of the pressing surface 311 of the mating portion 310 forms an angle with the assembly direction of the cylinder head cover 300 and the cylinder head body, during the assembly process of the cylinder head cover 300 and the cylinder head body, the inclined pressing surface 311 can gradually and gently press the seal 200, effectively preventing the mating portion 310 from scratching or cutting the seal 200 and preventing damage to the seal 200. Compared with conventional technology, the aforementioned motorcycle can avoid the cylinder head cover 300 scratching or cutting the seal 200 during the assembly process with the cylinder head body, ensuring the structural integrity of the seal 200 and thus improving the overall operational stability of the engine. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0079] The above embodiments merely illustrate 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 water pump mounting structure, characterized in that, include: The water pump body is provided with a docking part; A sealing element is disposed at the mating portion; A cylinder head, comprising a cylinder head cover and a cylinder head body, wherein the cylinder head cover is assembled to the cylinder head body, the cylinder head cover is provided with a mating part for mating with a connecting part, the mating part having a pressing surface, at least a portion of the pressing surface forming an angle with the assembly direction of the cylinder head cover, the pressing surface being used to press the seal.

2. The water pump installation structure according to claim 1, characterized in that, The docking part has an installation groove, and the sealing element is disposed in the installation groove.

3. The water pump installation structure according to claim 2, characterized in that, The groove of the mounting groove is opened along the direction of the mating part toward the fitting part, and at least a portion of the seal protrudes outside the groove of the mounting groove and is used for compression by the extrusion surface.

4. The water pump installation structure according to claim 3, characterized in that, The width of the extrusion surface along the direction from the mating portion toward the fitting portion is defined as W, and the height of the portion of the seal protruding from the mounting groove is defined as H, where W > H.

5. The water pump installation structure according to claim 1, characterized in that, The mating part has a mating surface on one side along the assembly direction, and a first transition area is provided at the joint between the extrusion surface and the mating surface. The first transition area is a convex arc surface.

6. The water pump installation structure according to claim 5, characterized in that, The mating part has a sealing surface on the side facing the mating part. The sealing surface is located on the side of the extrusion surface away from the assembly surface. The sealing surface is used to seal with the sealing element after the cylinder head cover and the cylinder head body are assembled.

7. The water pump installation structure according to claim 6, characterized in that, A second transition area is provided at the junction of the extrusion surface and the sealing surface, and the second transition area is an outwardly convex arc surface.

8. The water pump installation structure according to claim 1, characterized in that, The seal has a mating surface, which is an outwardly convex arc surface used for compression by the extrusion surface.

9. An engine, characterized in that, The engine includes the water pump mounting structure as described in any one of claims 1-8.

10. A motorcycle, characterized in that, The motorcycle includes the engine as described in claim 9.

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