Engine water pump, engine and motorcycle

Abstract

The application relates to an engine water pump, an engine and a motorcycle. The engine water pump comprises a casing, a rotating shaft and a vane seal assembly. The casing comprises a first casing body and a second casing body, the first casing body is arranged on the second casing body, the first casing body and the second casing body form a first containing cavity, the first casing body is provided with a water inlet and a water outlet, the second casing body is provided with a mounting through hole, the water inlet, the water outlet and the mounting through hole are communicated with the first containing cavity. The seal assembly is arranged in the mounting through hole, and a gap is arranged between the seal assembly and the hole wall of the mounting through hole. The second casing body is provided with a water discharge channel and a second containing cavity, one end of the water discharge channel is communicated with the gap, and the other end of the water discharge channel is communicated with the second containing cavity. The engine water pump, the engine and the motorcycle have the advantages of high durability and high aesthetic degree.

Description

Technical Field

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

[0002] Engine water pumps are typically mounted in an embedded manner on the engine side cover, meaning that part of the engine side cover serves as the housing for the engine water pump. The engine side cover stores lubricating oil, and to prevent the coolant in the engine water pump from mixing with the lubricating oil, a sealing component is press-fitted into the mounting holes of the side cover.

[0003] Due to manufacturing errors in parts and the operating conditions of the engine water pump, a small amount of coolant may leak from the sealing components during engine operation. Therefore, a drain port needs to be made in the wall of the mounting hole to drain the leaking coolant. However, after the coolant is drained from the drain port, it reacts with air to form blue-white crystals that accumulate on the engine side cover, corroding the engine casing and affecting the engine's appearance. Utility Model Content

[0004] Therefore, it is necessary to provide an engine water pump, engine, and motorcycle to address the problem that leaking coolant from the engine water pump can corrode the casing and affect the appearance.

[0005] This utility model provides an engine water pump, comprising:

[0006] A first housing and a second housing, wherein the first housing covers the second housing, and the first housing and the second housing together form a first receiving cavity. The first housing is provided with a water inlet and a water outlet, and the second housing is provided with a mounting through hole. The water inlet, the water outlet and the mounting through hole are all connected to the first receiving cavity.

[0007] A sealing assembly is installed in the mounting through hole, and a gap is provided between the sealing assembly and the wall of the mounting through hole;

[0008] The second housing is provided with a drain channel and a second receiving cavity. One end of the drain channel is connected to the gap, and the other end of the drain channel is connected to the second receiving cavity.

[0009] In one embodiment, the engine water pump further includes a rotating shaft and an impeller. The rotating shaft is rotatably disposed through the sealing assembly. One end of the rotating shaft is provided with a mounting portion, which is disposed within the first receiving cavity. The impeller is mounted on the mounting portion.

[0010] In one embodiment, the sealing assembly includes a first seal and a second seal. The first seal is installed on the side of the mounting through hole near the first receiving cavity, and the second seal is installed on the side of the mounting through hole away from the first receiving cavity. The first seal and the second seal are spaced apart, and the drain channel communicates with the spaced apart.

[0011] In one embodiment, the wall of the mounting through hole has a first step on the side near the first receiving cavity, and the first seal is engaged with the first step; the wall of the mounting through hole has a second step on the side away from the first receiving cavity, and the second seal is engaged with the second step.

[0012] In one embodiment, the first seal includes a rotating ring and a stationary ring, the stationary ring being engaged with the mounting through hole, the rotating ring being mounted on the side of the impeller facing the mounting through hole, and the stationary ring being sealed to the rotating ring.

[0013] In one embodiment, the stationary ring includes a ring body, an elastic element, and an abutment. The ring body includes an outer side and an inner side. The outer side abuts against the wall of the mounting through hole. An annular groove is provided between the outer side and the inner side. The abutment is sleeved in the annular groove. The end face of the abutment abuts against the moving ring. The inner side of the abutment abuts against the groove wall of the annular groove. One end of the elastic element is connected to the abutment, and the other end of the elastic element is connected to the ring body.

[0014] In one embodiment, the ring body is connected to the wall of the mounting through hole by an interference fit.

[0015] In one embodiment, the second housing is further provided with a discharge port that communicates with the second receiving cavity, and the second housing further includes a sealing member that is detachably installed on the discharge port.

[0016] This utility model also provides an engine, including the engine water pump of the above embodiment, wherein the second housing of the engine water pump is the side cover of the engine.

[0017] This utility model also provides a motorcycle, including the engine of the above-described embodiments.

[0018] The aforementioned engine water pump, engine, and motorcycle have a second housing that is part of the engine's side cover. A first housing is placed on top of the second housing to form a first receiving cavity. Coolant is introduced into the first receiving cavity through an inlet, and then driven to exit through an outlet, causing the engine water pump to circulate the coolant. A sealing component is installed on the mounting hole of the second housing to prevent the coolant from mixing with the engine oil. Due to manufacturing errors and the operating conditions of the engine water pump, gaps may occur between the sealing component and the wall of the mounting hole, allowing coolant to leak through these gaps. By providing a drain channel and a second receiving cavity in the second housing, leaked coolant can flow into the second receiving cavity for storage, preventing coolant from directly flowing onto the ground and polluting the environment, and preventing coolant from remaining on the surface of the second housing and corroding the engine surface or affecting the engine's appearance, thus improving the engine's durability and aesthetics. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the engine water pump described in the background section of this application.

[0020] Figure 2 This is a cross-sectional structural diagram of the engine water pump described in the background section of this application.

[0021] Figure 3 This is a schematic diagram of the engine water pump described in an embodiment of this application.

[0022] Figure 4 This is a cross-sectional structural diagram of the engine water pump described in an embodiment of this application.

[0023] Figure 5 This is a schematic diagram of the structure of the second receiving cavity of the engine water pump described in an embodiment of this application.

[0024] Figure 6 This is a cross-sectional structural diagram of the first seal of the engine water pump described in an embodiment of this application.

[0025] Figure 7 This is a cross-sectional installation diagram of the sealing assembly of the engine water pump described in an embodiment of this application.

[0026] Icon labels:

[0027] 100. Housing; 100A. First receiving cavity; 110. First housing; 111. Water inlet; 112. Water outlet; 120. Second housing; 120A. Mounting through hole; 120B. Drainage channel; 120C. Second receiving cavity; 120D. Discharge port; 121. Sealing element; 122. First step; 123. Second step; 130. Sealing ring;

[0028] 210. Shaft; 220. Impeller;

[0029] 300, Sealing assembly; 310, First seal; 311, Moving ring; 312, Stationary ring; 3121, Ring body; 3122, Outer side; 3123, Inner side; 3121A, Ring groove; 3124, Elastic element; 3125, Abutting element; 320, Second seal; 300A, Spacing; 300B, Gap. Detailed Implementation

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] See Figure 1 and Figure 2 This diagram illustrates the structure of the engine water pump described in the background section of this application. The engine water pump includes a housing 100, a rotating shaft 210, an impeller 220, and a sealing assembly 300. The housing 100 includes a first housing 110 and a second housing 120, with the first housing 110 covering the second housing 120. The first housing 110 and the second housing 120 together form a first receiving cavity 100A. The first housing 110 has an inlet 111 and an outlet 112, and the second housing 120 has a mounting through hole 120A. The inlet 111, the outlet 112, and the mounting through hole 120A are all connected to the first receiving cavity 100A. The inlet 111 is used to input coolant, and the outlet 112 is used to output coolant.

[0037] The sealing assembly 300 is installed in the mounting through hole 120A, and a gap 300B is provided between the sealing assembly 300 and the wall of the mounting through hole 120A.

[0038] Among them, combined Figures 3 to 5 As shown, the second housing 120 of this application is provided with a drain channel 120B and a second receiving cavity 120C. One end of the drain channel 120B is connected to the gap 300B, and the other end of the drain channel 120B is connected to the second receiving cavity 120C.

[0039] In one embodiment, the engine water pump is embedded in the engine side cover, so the second housing 120 is part of the engine side cover.

[0040] The engine water pump described in this application embodiment forms a first receiving cavity 100A by covering the second housing 120 with a first housing 110. Coolant is input into the first receiving cavity 100A through the water inlet 111, and then the coolant is driven to be output from the water outlet 112, so that the engine water pump drives the coolant circulation.

[0041] In the engine water pump described in this application embodiment, a sealing assembly 300 is installed on the mounting through hole 120A of the second housing 120. The sealing assembly 300 is used to prevent coolant from mixing with engine oil. Due to manufacturing errors and the operating conditions of the engine water pump, a gap 300B will be generated between the sealing assembly 300 and the hole wall of the mounting through hole 120A. Coolant can easily leak through the gap 300B of the sealing assembly 300. By providing a drain channel 120B and a second receiving cavity 120C in the second housing 120, the leaked coolant can flow into the second receiving cavity 120C for storage through the drain channel 120B, avoiding coolant from flowing directly onto the ground and polluting the environment, and preventing coolant from remaining on the surface of the second housing 120 and corroding the engine surface and affecting the engine's appearance, thereby improving the engine's durability and aesthetics.

[0042] In one exemplary embodiment, such as Figure 4 As shown, the second receiving cavity 120C is located at the bottom of the first receiving cavity 100A, and the drain channel 120B vertically connects the gap 300B and the second receiving cavity 120C. By setting the drain channel 120B vertically, leaked coolant can easily flow out from the drain channel 120B to the second receiving cavity 120C for storage under the action of gravity, avoiding the accumulation of leaked coolant in the mounting through hole 120A and improving the operational stability of the engine water pump.

[0043] In some embodiments, such as Figure 4 and Figure 5As shown, the second housing 120 also has a discharge port 120D, which communicates with the second receiving cavity 120C. The second housing 120 also includes a sealing member 121, which is detachably installed on the discharge port 120D. In this embodiment, by providing the discharge port 120D and sealing it with the sealing member 121, the sealing member 121 can be opened during engine maintenance to drain the coolant from the second receiving cavity 120C through the discharge port 120D, thereby cleaning the leaked coolant. This has the advantage of being easy to clean.

[0044] In one exemplary embodiment, the axis of the discharge port 120D and the axis of the drainage channel 120B are aligned. That is, when the drainage channel 120B is processed, the discharge port 120D can be processed at the same time, which has the advantage of convenient processing.

[0045] In an optional embodiment, such as Figure 1 and 2 As shown, the engine water pump also includes a rotating shaft 210 and an impeller 220. The rotating shaft 210 is rotatably mounted through the sealing assembly 300. One end of the rotating shaft 210 has a mounting portion, which is disposed within the first receiving cavity 100A. The impeller 220 is mounted on the mounting portion. The end of the rotating shaft 210 located outside the first receiving cavity 100A is used to connect to a drive source. In this embodiment, by setting up the rotating shaft 210 and the impeller 220, the rotating shaft 210 drives the impeller 220 to rotate within the first receiving cavity 100A, thereby driving the coolant transmission.

[0046] In some embodiments, such as Figure 2 and Figure 4 As shown, the sealing assembly 300 includes a first sealing element 310 and a second sealing element 320. The first sealing element 310 is installed on the side of the mounting through hole 120A near the first receiving cavity 100A, and the second sealing element 320 is installed on the side of the mounting through hole 120A away from the first receiving cavity 100A. The first sealing element 310 and the second sealing element 320 are separated by a gap 300A, and the drain channel 120B communicates with the gap 300A. Specifically, the first sealing element 310 is a water seal, and the second sealing element 320 is an oil seal. In other embodiments, the first sealing element 310 and the second sealing element 320 may also be other types of sealing elements, and this application is not limited thereto.

[0047] This embodiment of the application, by providing a first seal 310 on the side near the first receiving cavity 100A, can prevent coolant in the first receiving cavity 100A from directly leaking through the mounting through hole 120A. Providing a second seal on the side away from the first receiving cavity 100A can prevent engine oil from leaking into the first receiving cavity 100A and contaminating the coolant, thus ensuring stable operation of the engine water pump. However, due to manufacturing errors and the operating conditions of the engine water pump, the small gap 300B between the first seal 310 and the mounting through hole 120A is prone to leakage. The leaked coolant will enter the gap 300A and then enter the second receiving cavity 120C through the drain channel 120B. During engine maintenance, the coolant in the second receiving cavity 120C needs to be cleaned to prevent leaked coolant from accumulating on the engine surface, thereby improving the engine's durability and reliability.

[0048] In an optional embodiment, such as Figure 2 As shown, the wall of the mounting through hole 120A has a first step 122 on the side near the first receiving cavity 100A, and the first sealing member 310 is engaged in the first step 122. The wall of the mounting through hole 120A has a second step 123 on the side away from the first receiving cavity 100A, and the second sealing member 320 is engaged in the second step 123.

[0049] In this embodiment, by setting a first step 122 and a second step 123 in the mounting through hole 120A, the first seal 310 and the second seal 320 are respectively installed on different steps, providing precise axial limiting and radial centering for the first seal 310 and the second seal 320, ensuring the coaxiality of the first seal 310 and the second seal 320 with the mounting through hole 120A and the rotating shaft 210, which has the advantage of improving the sealing performance of the first seal 310 and the second seal 320.

[0050] Combination Figure 6 and Figure 7 The diagram shows a structural schematic of the sealing assembly of an engine water pump according to an embodiment of the present application. In an optional embodiment, the first seal 310 includes a rotating ring 311 and a stationary ring 312. The stationary ring 312 is engaged in the mounting through hole 120A, and the rotating ring 311 is mounted on the side of the impeller 220 facing the mounting through hole 120A. The stationary ring 312 is sealed to the rotating ring 311.

[0051] In this embodiment, the stationary ring 312 of the first sealing member 310 is fixed in the mounting through hole 120A, and the rotating ring 311 rotates synchronously with the impeller 220 and is sealed to the stationary ring 312. The linkage between the rotating ring 311 and the impeller 220 enables synchronous rotation with the shaft, ensuring that the sealing surfaces of the rotating ring 311 and the stationary ring 312 are always precisely fitted, effectively blocking coolant leakage and ensuring the sealing reliability of the engine water pump.

[0052] In an optional embodiment, such as Figure 6 and Figure 7 As shown, the stationary ring 312 includes a ring body 3121, an elastic element 3124, and an abutment element 3125. The ring body 3121 includes an outer side 3122 and an inner side 3123. The outer side 3122 abuts against the wall of the mounting through hole 120A. An annular groove 3121A is provided between the outer side 3122 and the inner side 3123. The abutment element 3125 is fitted into the annular groove 3121A. The end face of the abutment element 3125 abuts against the moving ring 311, and the inner side face of the abutment element 3125 abuts against the groove wall of the annular groove 3121A. One end of the elastic element 3124 is connected to the abutment element 3125, and the other end of the elastic element 3124 is connected to the ring body 3121. Specifically, the ring body 3121 is connected to the wall of the mounting through hole 120A by an interference fit.

[0053] In this embodiment, the stationary ring 312 has its ring body 3121 connected to the wall of the mounting through hole 120A via an interference fit, ensuring a secure overall installation of the stationary ring 312 and providing a stable reference for sealing. The outer edge of the ring body 3121 abuts against the hole wall, enhancing the fit and sealing between the ring body 3121 and the mounting through hole 120A, and precisely positioning the abutment part 3125 to prevent it from shifting. This creates a multi-directional fit and seal between the rotating ring 311 and the ring body 3121, reducing the risk of leakage. By incorporating the elastic element 3124, leakage at the sealing surface caused by wear of the rotating ring 311, vibration of the shaft 210, or assembly errors can be compensated in real time, maintaining a tight fit between the abutment part 3125 and the rotating ring 311 at all times, further improving sealing reliability.

[0054] In an exemplary embodiment, the ring 3121 is made of stainless steel. Stainless steel, with its excellent corrosion resistance, can resist the erosion of ethylene glycol degradation products, acidic substances, etc. in the coolant, preventing the ring 3121 from rusting or corroding and ensuring the sealing performance and long-term fit stability of the interference fit with the mounting through hole 120A.

[0055] In an optional embodiment, such as Figure 2 As shown, a sealing ring 130 is provided between the first housing 110 and the second housing 120. In this embodiment, by providing the sealing ring 130, the leakage of coolant from the first receiving cavity 100A can be effectively prevented, while simultaneously preventing external dust and impurities from entering the first receiving cavity 100A and contaminating the impeller 220. It can also buffer the vibration transmission during the operation of the housing 100, reduce wear and noise caused by the rigid contact between the first housing 110 and the second housing 120, maintain long-term sealing stability, and extend the overall service life of the engine water pump.

[0056] In an optional embodiment, the engine water pump further includes a bearing, and a third step is provided on the side of the mounting hole 120A away from the first receiving cavity 100A. The bearing is mounted on the third step, and the rotating shaft 210 passes through the bearing. This embodiment, by providing a third step for mounting the bearing and having the rotating shaft 210 pass through it, provides precise axial positioning and radial limiting for the bearing, ensuring the coaxiality of the bearing, the rotating shaft 210, and the mounting hole 120A. This provides reliable support for the rotating shaft 210, ensuring stable impeller operation and improving the efficiency of the engine water pump in delivering coolant.

[0057] In an optional embodiment, the mounting portion of the shaft 210 is connected to the impeller 220 via a threaded connection, which has the advantage of facilitating installation.

[0058] In an optional embodiment, the first housing 110 and the second housing 120 are connected by fasteners, which has the advantage of facilitating installation. Specifically, the fasteners are bolts or screws.

[0059] On the other hand, this application also provides an engine, such as Figures 1 to 7 As shown, the engine water pump includes any of the above embodiments, and the second housing 120 of the engine water pump is a side cover of the engine. Furthermore, the rotating shaft 210 is connected to the power mechanism inside the engine. In other words, the engine water pump is mounted on the side cover of the engine.

[0060] In this embodiment, the rotating shaft 210 extends from the outside of the second housing 120 through the mounting through hole 120A into the first receiving cavity 100A, allowing the rotating shaft 210 to obtain power from the engine. A sealing assembly 300 is provided between the rotating shaft 210 and the hole wall of the mounting through hole 120A. Coolant can easily leak through the gap 300B of the sealing assembly 300. The leaked coolant can flow into the second receiving cavity 120C for storage through the drain channel 120B, preventing the coolant from flowing directly onto the ground and polluting the environment, and preventing the coolant from remaining on the surface of the second housing 120. This avoids coolant accumulation that corrodes the engine surface and affects the engine's appearance, thereby improving the engine's durability and aesthetics.

[0061] On the other hand, this application also provides a motorcycle including the engine described in any of the above embodiments. In the motorcycle described in this embodiment, since the second housing 120 of the engine is provided with a drain channel 120B and a second receiving cavity 120C, coolant leaking from the gap 300B of the sealing assembly 300 can flow into the second receiving cavity 120C for storage through the drain channel 120B. This prevents coolant from flowing directly onto the ground and polluting the environment, and also prevents coolant from remaining on the surface of the second housing 120, thereby preventing coolant accumulation from corroding the engine surface and affecting the engine's appearance, improving the engine's durability and aesthetics.

[0062] 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.

[0063] 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. An engine water pump, characterized in that, include: A first housing (110) and a second housing (120) are provided, with the first housing (110) covering the second housing (120). The first housing (110) and the second housing (120) together form a first receiving cavity (100A). The first housing (110) is provided with an inlet (111) and an outlet (112). The second housing (120) is provided with a mounting through hole (120A). The inlet (111), the outlet (112), and the mounting through hole (120A) are all connected to the first receiving cavity (100A). A sealing assembly (300) is installed in the mounting through hole (120A), and a gap (300B) is provided between the sealing assembly (300) and the hole wall of the mounting through hole (120A). The second housing (120) is provided with a drain channel (120B) and a second receiving cavity (120C). One end of the drain channel (120B) is connected to the gap (300B), and the other end of the drain channel (120B) is connected to the second receiving cavity (120C).

2. The engine water pump according to claim 1, characterized in that: The engine water pump also includes a rotating shaft (210) and an impeller (220). The rotating shaft (210) is rotatably inserted through the sealing assembly (300). One end of the rotating shaft (210) is provided with a mounting part, which is disposed in the first receiving cavity (100A). The impeller (220) is mounted on the mounting part.

3. The engine water pump according to claim 2, characterized in that: The sealing assembly (300) includes a first seal (310) and a second seal (320). The first seal (310) is installed on the side of the mounting through hole (120A) near the first receiving cavity (100A), and the second seal (320) is installed on the side of the mounting through hole (120A) away from the first receiving cavity (100A). The first seal (310) and the second seal (320) are provided with a gap (300A), and the drain channel (120B) communicates with the gap (300A).

4. The engine water pump according to claim 3, characterized in that: The mounting through hole (120A) has a first step (122) on the side near the first receiving cavity (100A), and the first seal (310) is engaged in the first step (122). The mounting through hole (120A) has a second step (123) on the side away from the first receiving cavity (100A), and the second seal (320) is engaged in the second step (123).

5. The engine water pump according to claim 3, characterized in that: The first sealing element (310) includes a rotating ring (311) and a stationary ring (312). The stationary ring (312) is engaged in the mounting through hole (120A). The rotating ring (311) is mounted on the side of the impeller (220) facing the mounting through hole (120A). The stationary ring (312) is sealed to the rotating ring (311).

6. The engine water pump according to claim 5, characterized in that: The stationary ring (312) includes a ring body (3121), an elastic element (3124), and an abutment (3125). The ring body (3121) includes an outer side (3122) and an inner side (3123). The outer side (3122) abuts against the wall of the mounting through hole (120A). An annular groove (3121A) is provided between the outer side (3122) and the inner side (3123). The abutment (3125) is sleeved in the annular groove (3121A). The end face of the abutment (3125) abuts against the moving ring (311), and the inner side of the abutment (3125) abuts against the groove wall of the annular groove (3121A). One end of the elastic element (3124) is connected to the abutment (3125), and the other end of the elastic element (3124) is connected to the ring body (3121).

7. The engine water pump according to claim 6, characterized in that: The ring body (3121) is connected to the wall of the mounting through hole (120A) by an interference fit.

8. The engine water pump according to any one of claims 1-7, characterized in that: The second housing (120) is also provided with a discharge port (120D), which is connected to the second receiving cavity (120C). The second housing (120) also includes a sealing member (121), which is detachably installed on the discharge port (120D).

9. An engine, characterized in that: The engine water pump includes any one of claims 1-8, wherein the second housing (120) of the engine water pump is a side cover of the engine.

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

Images