Oil tank

Abstract

The invention discloses an oil tank, and belongs to the technical field of automobile parts. The oil tank comprises an oil tank body and an oil drain plug. After the fixing piece of the oil drain screw plug is connected with the oil tank, at least part of the oil drain screw plug body can be located in the first through hole of the oil tank body, and the part, located in the first through hole, of the oil drain screw plug body can block the second through hole, so that engine oil located in the containing cavity of the oil tank body cannot flow out to the outside through the first through hole; and the water does not flow to the outside through the second through hole. In this way, the oil drain screw plug can be connected with the oil tank body through the fixing piece, and the oil tank body can be sealed through the oil drain screw plug body. In this way, the oil drain screw plug and the oil tank body are connected through the additional fixing piece, threads used for fixing do not need to be arranged on the oil drain screw plug body, the sealing performance of the oil drain screw plug body to the oil tank body is improved, and the manufacturing cost of the oil drain screw plug is reduced.

Description

Technical Field

[0001] This application relates to the technical field of automotive parts, and particularly relates to a fuel tank. Background Art

[0002] In various internal combustion engines such as automotive engines and other mechanical devices, an oil drain hole is generally provided at the bottom of an oil pan or a fuel tank, and the oil drain hole is sealed by an oil drain plug. When it is necessary to change the engine oil, the oil drain plug can be removed from the oil drain hole to drain the waste oil, and then the oil drain hole can be sealed again by the oil drain plug to add new engine oil into the oil pan or the fuel tank.

[0003] Currently, the oil drain hole is generally a threaded hole, and the oil drain plug is also provided with threads adapted to the threads of the oil drain hole, and the oil drain plug is fixed to the oil pan or the fuel tank through the cooperation of the threads of the oil drain plug and the threaded hole.

[0004] However, the oil drain plug with threads is not a bolt standard part, and the manufacturing cost of the oil drain plug is relatively high. Moreover, when the oil drain plug is removed to drain the waste oil, the waste oil will spray out axially through the oil drain plug, and the waste oil route is uncontrollable, which is more likely to pollute the environment. Summary of the Invention

[0005] An embodiment of this application provides a fuel tank, which can solve the problem that the manufacturing cost of the existing oil drain plug is relatively high. The technical solution is as follows:

[0006] On the one hand, a fuel tank is provided, including: a fuel tank body and an oil drain plug;

[0007] The fuel tank body has a receiving cavity, a first through hole and a second through hole. The first through hole communicates with the receiving cavity, the second through hole communicates with the first through hole, and the axial directions of the first through hole and the second through hole intersect;

[0008] The oil drain plug includes: an oil drain plug body and a fixing member; at least a part of the oil drain plug body can extend into the first through hole, and the fixing member is detachably connected to the fuel tank body;

[0009] Wherein, after the fixing member is connected to the fuel tank body, at least a part of the oil drain plug body is located in the first through hole, and the part of the oil drain plug body located in the first through hole can block the second through hole.

[0010] Optionally, the first through hole communicates with the receiving cavity through a first opening; the oil drain plug further includes: a sealing portion sleeved on the oil drain plug body;

[0011] Wherein, after the fixing member is connected to the fuel tank body, the sealing portion is located in the first through hole, and in the extending direction of the first through hole, the sealing portion is located between the second through hole and the first opening;

[0012] After the fixing member is separated from the fuel tank body, at least a part of the sealing portion is located in the first through hole, and in the extending direction of the first through hole, the second through hole is closer to the first opening relative to the sealing portion.

[0013] Optionally, the second through hole communicates with the first through hole through a second opening; a part of the first through hole between the first opening and the second opening is a first sub-through hole, and a part of the first through hole on the side of the second opening away from the first opening is a second sub-through hole;

[0014] Wherein, after the fixing member is connected to the fuel tank body, the sealing portion is located in the first sub-through hole; after the fixing member is separated from the fuel tank body, at least a part of the sealing portion is located in the second sub-through hole.

[0015] Optionally, the sealing portion includes: at least one sealing ring, and the outer side surface of the drain plug body has at least one card slot; the at least one sealing ring corresponds to the at least one card slot one by one, a part of each sealing ring is located in the corresponding card slot, and another part of each sealing ring is used to abut against the inner wall of the first through hole.

[0016] Optionally, the drain plug further includes: a functional portion; the functional portion is fixedly connected to the end of the drain plug body;

[0017] Wherein, after the fixing member is connected to the fuel tank body, the functional portion is located in the accommodation cavity.

[0018] Optionally, the number of the functional portions is multiple, and the multiple functional portions are sequentially connected in a direction away from the drain plug body;

[0019] Wherein, for any two adjacent functional portions, the radial dimension of the functional portion closer to the drain plug body is greater than the radial dimension of the functional portion farther from the drain plug body.

[0020] Optionally, the radial dimension of the functional portion closest to the drain plug body among the multiple functional portions is smaller than the radial dimension of the drain plug body.

[0021] Optionally, the interior of the functional portion integrates at least one of an engine oil quality monitoring device, an engine oil pressure monitoring device, and an engine oil temperature monitoring device.

[0022] Optionally, the fixing member includes: a bolt, and a first fixing portion and a second fixing portion integrally formed;

[0023] The first fixing portion is fixedly connected to the oil drain plug body, the second fixing portion has a third through hole, and the fuel tank body has a threaded hole communicating with the third through hole;

[0024] Wherein, the bolt is used to pass through the third through hole and the threaded hole for threaded connection.

[0025] Optionally, the oil drain plug further includes: an annular reinforcing portion, and the outer side of the reinforcing portion is fixedly connected to the inner wall of the third through hole;

[0026] Wherein, the bolt is used to pass through the area surrounded by the reinforcing portion and then is threadedly connected to the threaded hole.

[0027] The beneficial effects brought by the technical solution provided by the embodiment of the present application at least include:

[0028] After the fixing member of the oil drain plug is connected to the fuel tank, at least a part of the oil drain plug body can be located in the first through hole of the fuel tank body, and the part of the oil drain plug body located in the first through hole can block the second through hole, so that the engine oil in the accommodation cavity of the fuel tank body will not flow out to the outside through the first through hole or through the second through hole. In this way, the connection between the oil drain plug and the fuel tank body can be realized through the fixing member, and the fuel tank body can be sealed through the oil drain plug body. In this way, by providing an additional fixing member to connect the oil drain plug and the fuel tank body, there is no need to provide a thread for fixing on the oil drain plug body, which improves the sealing performance of the oil drain plug body to the fuel tank body and reduces the manufacturing cost of the oil drain plug. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 is a schematic structural diagram of a fuel tank after a fixing member provided by an embodiment of the present application is connected to the fuel tank body;

[0031] Figure 2 is a schematic structural diagram of a fuel tank after a fixing member provided by an embodiment of the present application is separated from the fuel tank body;

[0032] Figure 3 is a schematic structural diagram of another fuel tank after a fixing member provided by an embodiment of the present application is connected to the fuel tank body;

[0033] Figure 4 It is a schematic structural diagram of a fuel tank after another fixing member is separated from the fuel tank body provided by an embodiment of the present application;

[0034] Figure 5 It is a schematic structural diagram of a fuel tank body provided by an embodiment of the present application;

[0035] Figure 6 It is a schematic structural diagram of an oil drain plug provided by an embodiment of the present application;

[0036] Figure 7 It is a schematic structural diagram of another fuel tank body provided by an embodiment of the present application;

[0037] Figure 8 It is a schematic structural diagram of another oil drain plug provided by an embodiment of the present application;

[0038] Figure 9 It is a schematic structural diagram of a fuel tank after another fixing member is connected to the fuel tank body provided by an embodiment of the present application;

[0039] Figure 10 It is a schematic structural diagram of a fuel tank after another fixing member is separated from the fuel tank body provided by an embodiment of the present application. Detailed implementation manners

[0040] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0041] An embodiment of the present application provides a fuel tank. Please refer to Figure 1 , Figure 1 and Figure 2 , Figure 1 which is a schematic structural diagram of a fuel tank after a fixing member is connected to the fuel tank body provided by an embodiment of the present application, Figure 2 and

[0042] which is a schematic structural diagram of a fuel tank after a fixing member is separated from the fuel tank body provided by an embodiment of the present application. The fuel tank may include: a fuel tank body 010 and an oil drain plug 000.

[0043] The fuel tank body 010 may have a receiving cavity K, a first through hole S1, and a second through hole S2. The first through hole S1 of the fuel tank body 010 may communicate with the receiving cavity K, the second through hole S2 may communicate with the first through hole S1, and the axial directions of the first through hole S1 and the second through hole S2 intersect. The receiving cavity K of the fuel tank body 010 is used to receive engine oil.

[0044] The drain plug 000 may include: a drain plug body 100 and a fixing member 200. At least a part of the drain plug body 100 of the drain plug 000 can extend into the first through hole S1 of the fuel tank body 010. The fixing member 200 of the drain plug 000 may be detachably connected to the fuel tank body 010.

[0045] In the present application, after the fixing member 200 of the drain plug 000 is connected to the fuel tank body 010, at least a part of the drain plug body 100 may be located in the first through hole S1 of the fuel tank body 010, and the part of the drain plug body 100 located in the first through hole S1 can block the second through hole S2, so that the engine oil located in the receiving cavity K of the fuel tank body 010 will not flow out to the outside through the first through hole S1 or through the second through hole S2. In this way, the connection between the drain plug 000 and the fuel tank body 010 can be realized through the fixing member 200, and the fuel tank body 010 can be sealed through the drain plug body 100. Thus, by providing an additional fixing member 200 to connect the drain plug 000 and the fuel tank body 010, there is no need to provide threads for fixing on the drain plug body 100, which improves the sealing performance of the drain plug body 100 to the fuel tank body 010 and reduces the manufacturing cost of the drain plug 000.

[0046] It should be noted that after the fixing member 200 is separated from the fuel tank body 010, at least a part of the drain plug body 100 may still be located in the first through hole S1 of the fuel tank body 010, but the part of the drain plug body 100 located in the first through hole S1 will no longer block the second through hole S2. In this way, the dirty engine oil located in the receiving cavity K of the fuel tank body 010 can be drained through the second through hole S2.

[0047] In summary, the embodiment of the present application provides a fuel tank, including: a fuel tank body and an oil drain plug. After the fixing member of the oil drain plug is connected to the fuel tank, at least a part of the oil drain plug body can be located in the first through hole of the fuel tank body, and the part of the oil drain plug body located in the first through hole can block the second through hole, so that the engine oil in the accommodation cavity of the fuel tank body will not flow out to the outside through the first through hole or through the second through hole. In this way, the connection between the oil drain plug and the fuel tank body can be realized through the fixing member, and the fuel tank body can be sealed through the oil drain plug body. Thus, by providing an additional fixing member to connect the oil drain plug and the fuel tank body, there is no need to provide threads for fixing on the oil drain plug body, which improves the sealing performance of the oil drain plug body to the fuel tank body and reduces the manufacturing cost of the oil drain plug.

[0048] Optionally, as Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, Figure 3 FIG. is a schematic structural diagram of another fuel tank after the fixing member is connected to the fuel tank body provided by the embodiment of the present application, Figure 4 FIG. is a schematic structural diagram of another fuel tank after the fixing member is separated from the fuel tank body provided by the embodiment of the present application, Figure 5 FIG. is a schematic structural diagram of a fuel tank body provided by the embodiment of the present application, Figure 6 FIG. is a schematic structural diagram of an oil drain plug provided by the embodiment of the present application. The first through hole S1 of the fuel tank body 010 can communicate with the accommodation cavity K through the first opening O1. The oil drain plug 000 may further include: a sealing portion 101 sleeved on the oil drain plug body 100.

[0049] Wherein, after the fixing member 200 is connected to the fuel tank body 010, the sealing portion 101 can be located in the first through hole S1 of the fuel tank body 010, and in the extending direction of the first through hole S1, the sealing portion 101 can be located between the second through hole S2 and the first opening O1. In this way, the sealing portion 101 can block the engine oil flowing from the first opening O1 to the first through hole S1 to ensure that the engine oil will not flow into the second through hole S2 through the first through hole S1, so that the engine oil will not flow out to the outside through the first through hole S1 or through the second through hole S2. In this way, the sealing of the oil drain plug body 100 to the fuel tank body 010 is ensured.

[0050] After the fixing member 200 is separated from the fuel tank 100, at least a part of the sealing portion 101 can be located in the first passage S1, and in the extending direction of the first through hole S1, the second through hole S2 can be closer to the first opening O1 relative to the sealing portion 101. In this way, the sealing portion 101 can ensure that the engine oil flowing into the first through hole S1 from the first opening O1 does not flow out to the outside through the first through hole S1, and the engine oil flowing into the first through hole S1 can flow into the second through hole S2 to discharge the engine oil through the second through hole S2. That is, after the fixing member 200 is separated from the fuel tank, the engine oil located in the accommodation cavity K can flow into the first through hole S1 through the first opening O1, and then flow out to the outside through the second through hole S2. In this way, the flow route of the engine oil flowing out to the outside is defined, and the phenomenon of environmental pollution caused by the direct spraying of the engine oil is avoided.

[0051] Optionally, as Figure 3 , Figure 4 and Figure 7 shown, Figure 7 is a schematic structural diagram of another fuel tank body provided by an embodiment of the present application. The second through hole S2 of the fuel tank body 010 can communicate with the first through hole S1 through the second opening O2. The part of the first through hole S1 located directly between the secondary opening O1 and the second opening O2 can be the first sub-through hole S11, and the part of the first through hole S1 located on the side of the second opening O2 away from the first opening O1 is the second sub-through hole S12.

[0052] Among them, after the fixing member 200 is connected to the fuel tank body 010, the sealing portion 101 of the drain plug body 100 can be located in the first sub-through hole S11. In this way, the sealing portion 101 located in the first sub-through hole S11 ensures that the engine oil flowing into the first sub-through hole S11 from the first opening O1 does not flow into the second sub-through hole S12, and thus does not flow out to the outside through the second sub-through hole S12, and ensures that the engine oil flowing into the first sub-through hole S11 from the first opening O1 does not flow into the second through hole S2 through the second opening O2, and thus does not flow out to the outside through the second through hole O2. In this way, the sealing of the drain plug body 100 to the fuel tank body 010 is ensured.

[0053] After the fixing member 200 is separated from the fuel tank body 010, at least a part of the sealing portion 101 of the drain plug body 100 can be located in the second sub-through hole S12. In this way, the sealing portion 101 located in the second sub-through hole S12 can ensure that the engine oil flowing into the first sub-through hole S11 from the first opening O1 will not flow out to the outside through the second sub-through hole S12, but the engine oil flowing into the first sub-through hole S11 from the first opening O1 can flow into the second through hole S2 through the second opening O2, so as to flow out to the outside through the second through hole S2 to achieve oil draining. Thus, after the fixing member 200 is separated from the fuel tank body 010, the outflow path of the engine oil located in the accommodation cavity K can be: flowing into the first sub-through hole S11 through the first opening O1, flowing into the second through hole S2 through the second opening O2, and flowing out to the outside through the second through hole S2.

[0054] Optionally, as Figure 6 shown, the sealing portion 101 of the drain plug body 100 can include: at least one sealing ring, and the outer side surface of the drain plug body 100 can have at least one card slot H. At least one sealing ring can correspond to at least one card slot H one by one. A part of each sealing ring can be located in the corresponding card slot H, and another part of each sealing ring can be used to abut against the inner wall of the first through hole S1, so as to realize the sealing of the engine oil by the sealing ring. For example, the sealing ring can be an O-ring, the sealing portion 101 of the drain plug body 100 can include two sealing rings, and the outer side surface of the drain plug body can have two card slots H.

[0055] It should be noted that in the case where the sealing portion 101 includes two sealing rings, after the fixing member 200 is connected to the fuel tank body 010, both of the two sealing rings of the sealing portion 101 can abut against the inner wall of the first sub-through hole S11 in the first sub-through hole S11. After the fixing member 200 is separated from the fuel tank body 010, at least one of the two sealing rings of the sealing portion 101 can abut against the inner wall of the second sub-through hole S12 in the second sub-through hole S12.

[0056] Optionally, please refer to Figure 8 , Figure 8 which is a schematic structural diagram of another drain plug provided by an embodiment of the present application. The drain plug 000 can further include: a functional portion 300. The functional portion 300 of the drain plug 000 can be fixedly connected to the end of the drain plug body 100. Among them, after the fixing member 200 is connected to the fuel tank body 010, the functional portion 300 can be located in the accommodation cavity K of the fuel tank body 010. Here, the functional portion 300 located in the accommodation cavity K can be immersed in the engine oil to achieve corresponding functions. For example, the functional portion 300 can be integrated with a corresponding sensor device so that the functional portion 300 can achieve corresponding functions.

[0057] Optionally, asFigure 8 As shown, the number of functional parts 300 in the drain plug 00 can be multiple, and the multiple functional parts 300 can be sequentially connected in a direction away from the drain plug body 100. Among them, for any two adjacent functional parts 300, the radial dimension of the functional part 300 closer to the drain plug body 100 can be greater than the radial dimension of the functional part 300 farther from the drain plug body 100.

[0058] Optionally, the radial dimension of the functional part 300 closest to the drain plug body 100 among the multiple functional parts 300 can be smaller than the radial dimension of the drain plug body 100.

[0059] In this way, the radial dimensions of the multiple functional parts 300 are all smaller than the radial dimension of the drain plug body 100, and along the direction away from the drain plug body 100 among the multiple functional parts 300, the radial dimension of the functional part 300 gradually decreases.

[0060] In this way, after the fixing member 200 is connected to the fuel tank body 010, the sealing ring sleeved on the drain plug body 100 with a larger radial dimension can block the first sub-through hole S11, so that the engine oil will not flow into the second through hole S2. Exemplarily, the diameter of the drain plug body 100 can be equal to the aperture of the first through hole S1.

[0061] After the fixing member 200 is separated from the fuel tank body 010, at least part of the functional part 300 can be located in the first sub-through hole S1, and at least part of the functional part 300 can be distributed at the second opening O2. Here, the radial dimension of the functional part 300 with a smaller radial dimension can be smaller than the aperture of the first sub-through hole S1. In this way, a flow channel can be formed between the outer wall of the functional part 300 located in the first sub-through hole S1 and the inner wall of the first sub-through hole S1, and the engine oil located in the accommodation cavity K can flow into the second through hole S2 through this flow channel to flow out to the outside through the second through hole S2.

[0062] And for any two adjacent functional parts 300, the radial dimension of the functional part 300 closer to the drain plug body 100 being greater than the radial dimension of the functional part 300 farther from the drain plug body 100 can ensure that the functional part 300 farther from the drain plug body 100 will not obstruct the flow of the engine oil from the first sub-through hole S11 to the second through hole S2, ensuring the smooth outflow of the engine oil.

[0063] It should be noted that as Figure 8As shown, for any functional part 300, the functional part 300 may include: a connection part 301 and a functional body part 302 connected to the connection part 301. One end of the connection part 301 facing away from the corresponding functional body part 302 may be connected to the oil drain plug body 100 or the functional body part 302 of the previous functional part 300. Among them, the radial dimension of the connection part 302 may gradually decrease along the direction in which the oil drain plug body 100 approaches the functional body part 302. Here, the connection part 302 can ensure a smooth transition between multiple functional body parts 302.

[0064] Optionally, at least one of an engine oil quality monitoring device, an engine oil pressure monitoring device, and an engine oil temperature monitoring device may be integrated inside the functional part 300. Here, at least one of an engine oil quality monitoring device, an engine oil pressure monitoring device, and an engine oil temperature monitoring device may be integrated in one functional part 300. It should be noted that the engine oil quality monitoring device may be integrated in one functional part 300 close to the oil drain plug body 100 among multiple functional parts 300, the engine oil pressure monitoring device may be integrated in one functional part 300 facing away from the oil drain plug body 100 of the engine oil quality monitoring device, and the engine oil temperature monitoring device may be integrated in one functional part 300 far from the oil drain plug body 100 of the engine oil pressure monitoring device.

[0065] In this application, after the fixing part 200 is connected to the fuel tank body 010 and the functional part 300 is located in the accommodation cavity K of the fuel tank body 010, the engine oil quality monitoring device can monitor the quality of the engine oil located in the accommodation cavity K in real time, including viscosity, pollution degree, etc. The data on the engine oil quality monitored by the engine oil quality monitoring device can be transmitted to the vehicle's diagnostic system through virtual signals to realize the real-time tracking of the engine health by the vehicle's diagnostic system.

[0066] In addition, when calibrating the engine in the vehicle, an engine oil quality standard for maintenance can be set. The engine oil quality standard may include: an engine oil viscosity standard and an engine oil cleanliness standard. During the use of the vehicle, it can be determined whether maintenance is required based on the engine oil quality monitored in real time by the engine oil quality monitoring device and the engine oil quality standard. When the engine oil quality monitored by the engine oil monitoring device reaches the engine oil quality standard, the engine oil monitoring device can send a signal to the vehicle, and the vehicle can give a prompt to the user to remind the user to perform maintenance. It should be noted that when calibrating the engine in the vehicle, a compensation strategy regarding the driving mileage and the maintenance cycle can also be set, and a misplacement mode can be set, that is, when the vehicle receives two signals continuously, the vehicle will send a maintenance prompt to the user.

[0067] In this application, after the fixing member 200 is connected to the fuel tank body 010 and the functional part 300 is located in the accommodation cavity K of the fuel tank body 010, the engine oil pressure monitoring device can monitor the engine oil pressure in real time. Here, the vehicle can obtain the liquid level height of the engine oil based on the engine oil pressure monitored by the engine oil pressure monitoring device.

[0068] In addition, when calibrating the engine, the liquid level of the engine oil located in the fuel tank body 010 can be calibrated through the engine oil pressure monitoring device. In this way, during the use of the vehicle, the vehicle can directly obtain the liquid level height of the engine oil based on the pressure value obtained by the engine oil pressure monitoring device. It should be noted that the operation of calibrating the liquid level height of the engine oil needs to be carried out after the vehicle is turned off and has stopped running for a period of time to ensure the accuracy of the liquid level height calibration.

[0069] It should also be noted that after the engine oil pressure is monitored by the engine oil pressure monitoring device, the liquid level height can be obtained according to the liquid pressure calculation formula. Since the engine oil density is involved in the liquid pressure calculation formula, a density compensation strategy needs to be set when calibrating the liquid level height.

[0070] In this application, after the fixing member 200 is connected to the fuel tank body 010 and the functional part 300 is located in the accommodation cavity K of the fuel tank body 010, the engine oil temperature monitoring device can monitor the engine oil temperature in real time to prevent overheating damage and enhance driving safety.

[0071] In addition, when calibrating the engine, a temperature standard can be set. During the use of the vehicle, it is possible to judge whether the engine oil is overheated based on the engine oil temperature monitored in real time by the engine oil temperature monitoring device and the temperature standard, so as to avoid engine damage caused by overheated engine oil.

[0072] Optionally, as Figure 8 、 Figure 9 and Figure 10 shown, Figure 9 is a schematic structural diagram of the fuel tank after the fixing member is connected to the fuel tank body provided by an embodiment of the present application, Figure 10It is a schematic structural diagram of a fuel tank after the fixing member is separated from the fuel tank body provided by an embodiment of the present application. The fixing member 200 in the drain plug 000 may include: a bolt 201, and a first fixing portion 202 and a second fixing portion 203 integrally formed. The first fixing portion 202 of the fixing member 200 may be fixedly connected to the drain plug body 100, and the second fixing portion 203 may have a third through hole S3, and the fuel tank body 010 may have a threaded hole S4 communicating with the third through hole S3. Among them, the bolt 201 is used to pass through the third through hole S3 of the second fixing portion 203 and be threadedly connected to the threaded hole S4 of the fuel tank body 010. Here, through the threaded connection between the bolt 201 and the threaded hole S4 of the fuel tank body 010, the detachable connection between the fixing member 200 and the fuel tank body 010 can be realized.

[0073] It should be noted that, compared with the prior art in which threads are provided on the drain plug body for its detachable connection with the fuel tank body, the bolt 201 in the fixing member 200 can be a standard part, and the manufacturing cost of the bolt is relatively low. Therefore, the cost of realizing the detachable connection between the fixing member 200 and the fuel tank body 010 by the threaded connection between the bolt 201 and the threaded hole S4 of the fuel tank body 010 is relatively low.

[0074] Optionally, as Figure 8 , Figure 9 and Figure 10 shown, the drain plug may further include: an annular reinforcing portion 400. The outer side of the reinforcing portion 400 may be fixedly connected to the inner wall of the third through hole S3 of the second fixing portion 203. Among them, the bolt 201 is used to pass through the area surrounded by the reinforcing portion 400 and then be connected to the threaded hole S4 of the fuel tank body 010. Here, the reinforcing portion 400 can strengthen the strength of the second fixing portion 203 and prevent the bolt 201 from fracturing the second fixing portion 203.

[0075] Optionally, as Figure 9 and Figure 10 shown, the threaded length of the threaded hole S4 of the fuel tank body 010 may be greater than the threaded length of the bolt 201. In this way, after the drain plug 000 is used for a period of time, if some threads in the threaded hole S4 for threaded connection with the bolt 201 are damaged, another bolt with a longer threaded length can be replaced to cooperate with the undamaged threads in the threaded hole S4. In this way, replacing the fuel tank body 010 is avoided to the greatest extent.

[0076] Optionally, as Figure 9 and Figure 10As shown, the drain plug may further include a handle 500. The handle 500 may be fixedly connected to one end of the first fixing portion 202 away from the drain plug body 100. In this way, after the connection between the bolt 201 and the threaded hole S4 of the fuel tank body 010 is cancelled, the user can hold the handle 500 to separate the fixing member 200 from the fuel tank body 010, which facilitates the user's operation. And a wire harness may be integrated in the handle 500. One end of the wire harness may be electrically connected to the functional portion 300, and the other end may be electrically connected to the vehicle.

[0077] In summary, the embodiment of the present application provides a fuel tank, including: a fuel tank body and a drain plug. After the fixing member of the drain plug is connected to the fuel tank, at least a part of the drain plug body may be located in the first through hole of the fuel tank body, and the part of the drain plug body located in the first through hole can block the second through hole, so that the engine oil in the accommodating cavity of the fuel tank body will not flow out to the outside through the first through hole, nor will it flow out to the outside through the second through hole. In this way, the connection between the drain plug and the fuel tank body can be realized through the fixing member, and the fuel tank body can be sealed through the drain plug body. By setting an additional fixing member to connect the drain plug and the fuel tank body, there is no need to provide threads for fixing on the drain plug body, which improves the sealing performance of the drain plug body to the fuel tank body and reduces the manufacturing cost of the drain plug.

[0078] In the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. The term "plural" means two or more, unless otherwise clearly defined.

[0079] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fuel tank, characterized in that, include: Oil tank body (010) and oil drain plug (000); The oil tank body (010) has a containing cavity (K), a first through hole (S1) and a second through hole (S2), wherein the first through hole (S1) is connected to the containing cavity (K), the second through hole (S2) is connected to the first through hole (S1), and the axial direction of the first through hole (S1) and the axial direction of the second through hole (S2) intersect; The oil drain plug (000) comprises: an oil drain plug body (100) and a fixing member (200); at least a portion of the oil drain plug body (100) can extend into the first through hole (S1), and the fixing member (200) is detachably connected to the oil tank body (100); Wherein, after the fixing member (200) is connected to the oil tank body (010), at least a portion of the oil drain plug body (100) is located in the first through hole (S1), and a portion of the oil drain plug body (100) located in the first through hole (S1) can block the second through hole (S2).

2. The fuel tank according to claim 1, characterized in that, The first through hole (S1) is in communication with the accommodating chamber (K) via a first opening (O1); the oil drain plug (000) further comprises: a sealing portion (101) sleeved on the oil drain plug body (100); wherein, after the fixing member (200) is connected to the oil tank body (010), the sealing portion (101) is located in the first through hole (S1), and in the extending direction of the first through hole (S1), the sealing portion (101) is located between the second through hole (S2) and the first opening (O1); After the fixing member (200) is separated from the tank body (010), at least a portion of the sealing portion (101) is located in the first through hole (S1), and in the extension direction of the first through hole (S1), the second through hole (S2) is closer to the first opening (O1) relative to the sealing portion (101).

3. The fuel tank according to claim 2, characterized in that, The second through hole (S2) is connected to the first through hole (S1) through the second opening (O2); a portion of the first through hole (S1) located between the first opening (O1) and the second opening (O2) is a first sub-through hole (S11), and a portion of the first through hole (S1) located on a side of the second opening (O2) away from the first opening (O1) is a second sub-through hole (S12); Wherein, after the fixing member (200) is connected to the oil tank body (010), the sealing portion (101) is located in the first sub-through hole (S11); after the fixing member (200) is separated from the oil tank body (010), at least part of the sealing portion (101) is located in the second sub-through hole (S12).

4. The fuel tank according to claim 2, characterized in that, The sealing portion (101) includes: at least one sealing ring, and the outer side surface of the drain plug body (100) has at least one clamping groove (H); the at least one sealing ring corresponds to the at least one clamping groove (H) one by one, a part of each sealing ring is located in the corresponding clamping groove (H), and another part of each sealing ring is used to abut against the inner wall of the first through hole (S1).

5. The fuel tank according to any one of claims 1-4, characterized in that, The drain plug (000) further includes: a functional portion (300); the functional portion (300) is fixedly connected to the end of the drain plug body (100); Wherein, after the fixing member (200) is connected to the fuel tank body (010), the functional portion (300) is located in the accommodating cavity (K).

6. The fuel tank according to claim 5, characterized in that, The number of the functional portions (300) is multiple, and the multiple functional portions (300) are sequentially connected along the direction away from the drain plug body (100); Wherein, for any two adjacent functional portions (300), the radial dimension of the functional portion (300) closer to the drain plug body (100) is greater than the radial dimension of the functional portion (300) farther from the drain plug body (100).

7. The fuel tank according to claim 5, characterized in that, The radial dimension of the functional portion (300) closest to the drain plug body (100) among the multiple functional portions (300) is smaller than the radial dimension of the drain plug body (100).

8. The fuel tank according to claim 5, characterized in that, At least one of an engine oil quality monitoring device, an engine oil pressure monitoring device, and an engine oil temperature monitoring device is integrated inside the functional portion (300).

9. The fuel tank according to any one of claims 1-4, 6-8, characterized in that The fixing member (200) includes: a bolt (201), and a first fixing portion (202) and a second fixing portion (203) integrally formed; The first fixing portion (202) is fixedly connected to the drain plug body (100), the second fixing portion (203) has a third through hole (S3), and the fuel tank body (010) has a threaded hole (S4) communicated with the third through hole; Wherein, the bolt is used to pass through the third through hole (S3) and the threaded hole (S4) for threaded connection.

10. The fuel tank according to claim 9, characterized in that, The drain plug (000) further includes: an annular reinforcing portion (400), and the outer side of the reinforcing portion (400) is fixedly connected to the inner wall of the third through hole (S3); Wherein, the bolt is used to pass through the area surrounded by the reinforcing portion (400) and then is threadedly connected to the threaded hole.

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