Oil drain plug, oil pan structure and engine

Abstract

The utility model relates to the technical field of engines, and discloses a drain plug, an oil pan structure and an engine, which are simple to operate and high in maintenance efficiency when engine oil is replaced. The oil drain screw plug comprises a valve body, an oil drain pipe, a first oil drain pipe and a second oil drain pipe, the oil drainage channel communicates with the interior of the oil pan and intersects and communicates with the first containing cavity. The valve core comprises a ball valve and a valve rod which are connected with each other; the ball valve is located at the communicating position of the oil drainage channel and the first containing cavity, and the valve rod is arranged in the first containing cavity in a penetrating mode. The ball valve is provided with an opening position and a closing position for opening and closing the oil drainage channel; at least part of the structure of the handle is located in the first containing cavity and connected with the valve rod; the handle is rotatably arranged and is suitable for driving the ball valve to rotate between an opening position and a closing position through the valve rod during rotation; the elastic piece is located in the first containing cavity and is telescopically arranged between the valve body and the handle; in the closing position, the elastic piece is suitable for providing restoring force for the handle so that the handle can abut against the valve body.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an oil drain plug, an oil pan structure and an engine. Background Art

[0002] Engines require regular oil changes for maintenance. The engine's oil pan is typically equipped with a drain plug, which facilitates oil changes. In related art, the drain plug is typically sealed to the through-hole of the oil pan using a gasket. This requires disassembly of the drain plug and gasket during oil changes, making maintenance complex and inefficient. Utility Model Content

[0003] In view of this, the utility model provides an oil drain plug, an oil pan structure and an engine to solve the problem that the engine oil maintenance operation is complicated and inefficient.

[0004] In the first aspect, the utility model provides an oil drain plug for being installed on the oil pan, comprising: a valve body, a drain channel and a first accommodating chamber being provided in the valve body, the drain channel being used to communicate with the interior of the oil pan, the drain channel intersecting and communicating with the first accommodating chamber; a valve core, comprising a connected ball valve and a valve stem; the ball valve is located at the connection between the drain channel and the first accommodating chamber, and the valve stem is passed through the first accommodating chamber; the ball valve has an open position for opening the oil drain channel and a closed position for closing the oil drain channel; a handle, at least part of its structure is located in the first accommodating chamber and is connected to the valve stem; the handle is rotatably arranged and is suitable for driving the ball valve to rotate between the open position and the closed position through the valve stem when rotating; an elastic member is located in the first accommodating chamber and is telescopically arranged between the valve body and the handle; in the closed position, the elastic member is suitable for providing a restoring force to the handle to press the handle against the valve body.

[0005] In an optional embodiment, the valve body includes a first valve body and a first baffle arranged in the first valve body, and the first valve body and the first baffle together form a first accommodating chamber; along the first direction, the valve stem passes through the handle and has a first end and a second end respectively located on both sides of the handle; the first end is connected to the ball valve, the second end is located between the handle and the first baffle, and the elastic member is sleeved on the second end; in the closed position, the elastic member is compressed between the first baffle and the handle to provide a restoring force to the handle; wherein the first direction is the extension direction of the first accommodating chamber.

[0006] In an optional embodiment, the valve body also includes a second baffle, which is located in the first accommodating cavity and is sleeved on the first end; along the first direction, the handle is movably arranged between the first baffle and the second baffle; in the open position, the second baffle is in contact with the handle; in the closed position, the second baffle is disengaged from the handle.

[0007] In an optional embodiment, an opening communicating with the first accommodating cavity is provided on the first valve body; the opening extends circumferentially around the first valve body; at least part of the structure of the handle extends into the first accommodating cavity through the opening and is connected to the valve stem; around the circumference of the first valve body, the length of the opening is greater than the width of the handle so that the handle can rotate along the opening; and along the first direction, the width of at least part of the structure of the opening is greater than the thickness of the handle so that the handle can move along the first direction.

[0008] In an optional embodiment, the first valve body is provided with a first annular boss and a second annular boss, the first annular boss and the second annular boss are located in the first accommodating cavity and are spaced apart along the first direction; the first baffle is provided on the first annular boss, and the second baffle is provided on the second annular boss; or, the oil drain plug further includes a retaining spring, and the first valve body is further provided with a first annular retaining groove, and the first annular retaining groove is located on the side of the first annular boss away from the second annular boss; the retaining spring is clamped in the first annular retaining groove, and clamps the first baffle to the first annular boss; or, the oil drain plug further includes a first sealing component, which is sleeved on the first end of the valve stem and sealed with the inner wall of the first accommodating cavity.

[0009] In an optional embodiment, the valve body includes a second valve body and a third valve body, the second valve body is connected to the third valve body, and together form an oil drain channel and a second accommodating chamber; the oil drain channel runs through the second valve body and the third valve body along the second direction; the second accommodating chamber is formed at the connection between the second valve body and the third valve body, and connects the oil drain channel and the first accommodating chamber; the ball valve is located in the second accommodating chamber; or, the oil drain plug also includes two valve seats, the two valve seats are located in the second accommodating chamber, and are respectively located on both sides of the ball valve along the second direction; the side of the valve seat facing the ball valve is provided with an arc-shaped concave surface; or, the oil drain plug also includes a second seal, which is sealed and fitted at the connection between the second valve body and the third valve body; wherein the second direction is the extension direction of the oil drain channel.

[0010] In an optional embodiment, the oil drain plug further includes a tube body, which is connected to an end of the third valve body away from the second valve body, and the tube body is communicated with the oil drain passage.

[0011] In a second aspect, the present invention further provides an oil pan structure, comprising: an oil pan; and an oil drain plug such as the above-mentioned oil drain plug, which is connected to the oil pan.

[0012] In an optional embodiment, the oil pan structure further includes a connecting piece, a through hole is provided at the bottom of the oil pan, and the connecting piece is fixedly connected to the through hole of the oil pan; the drain plug is detachably connected to the connecting piece; or, the oil pan structure further includes a third sealing piece, which is sealingly fitted at the connection between the connecting piece and the drain plug.

[0013] In a third aspect, the present invention further provides an engine, comprising: the oil drain plug as described above; or, the oil pan structure as described above.

[0014] The oil drain plug of the utility model rotates the ball valve between open and closed positions by turning the handle, thereby achieving oil replacement. In the closed position, the handle is pressed against the valve body by an elastic member, preventing the handle from rotating due to vibration and other reasons, which could cause the oil drain passage to open accidentally. When maintenance is required, the ball valve is turned to the open position using the handle, opening the oil drain passage and allowing the oil pan to drain the waste oil through the drain passage. After the waste oil has been drained, the ball valve is turned to the closed position using the handle, and the elastic member presses the handle against the valve body, closing the oil drain passage.

[0015] By utilizing the technical solution of the utility model, there is no need to remove the oil drain plug and the sealing gasket during maintenance, and it can be achieved by simply turning the handle, which saves maintenance costs, is simple and convenient to operate, and has high maintenance efficiency; and under the action of the elastic part, the handle is prevented from opening the oil drain channel under non-human operation, thereby ensuring the reliability of the application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a cross-sectional view of an oil pan structure according to an embodiment of the present utility model;

[0018] Figure 2 This is a structural schematic diagram of an oil drain plug according to an embodiment of the present utility model;

[0019] Figure 3 This is a cross-sectional view of an oil drain plug according to an embodiment of the present utility model;

[0020] Figure 4 for Figure 3 A partial enlarged schematic diagram;

[0021] Figure 5 This is a structural schematic diagram of a first valve body and a second valve body according to an embodiment of the present utility model;

[0022] Figure 6 This is a structural schematic diagram of a first valve body and a second valve body according to an embodiment of the present utility model from another perspective;

[0023] Figure 7This is a structural schematic diagram of a third valve body according to an embodiment of the present utility model;

[0024] Figure 8 This is a structural diagram of a ball valve according to an embodiment of the present utility model;

[0025] Figure 9 This is a structural schematic diagram of a valve stem according to an embodiment of the present utility model.

[0026] Description of reference numerals:

[0027] 1. Valve body; 101. Oil drain channel; 102. First accommodating chamber; 103. Second accommodating chamber; 11. First valve body; 110. Opening; 1101. First opening; 1102. Second opening; 111. First annular boss; 112. Second annular boss; 113. First annular groove; 12. First baffle; 13. Second baffle; 14. Second valve body; 141. Fourth annular groove; 15. Third valve body; 151. Third annular groove; 2. Valve core; 2 1. Ball valve; 210. Perforation; 211. Groove; 22. Valve stem; 221. First end; 2211. Second annular groove; 2212. Bump; 222. Second end; 3. Handle; 31. Connecting portion; 32. Gripping portion; 4. Elastic member; 5. Retaining spring; 6. First sealing member; 7. Valve seat; 8. Second sealing member; 9. Tube; 10. Clamp; 20. Oil pan; 30. Connecting member; 40. Third sealing member; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0028] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0029] The following combination Figures 1 to 9 , describing the embodiments of the present utility model.

[0030] According to an embodiment of the present invention, an engine is provided, the engine including an oil pan structure, such as Figure 1 As shown, the oil pan structure includes an oil pan 20 and an oil drain plug connected to each other. Specifically, a through hole is provided at the bottom of the oil pan 20 , and the oil drain plug is connected to the through hole of the oil pan 20 .

[0031] Specifically, the oil drain plug includes a valve body 1, a valve core 2, a handle 3, and an elastic member 4. The oil drain plug is installed on the oil pan 20 through the valve body 1, that is, the valve body 1 is connected to the through hole of the oil pan 20. The valve body 1 is provided with an oil drain channel 101 and a first accommodating chamber 102. The oil drain channel 101 is connected to the interior of the oil pan 20 through the through hole. The oil drain channel 101 intersects and communicates with the first accommodating chamber 102. Figure 1 As shown, the first accommodating cavity 102 extends along a first direction X, and the oil drain channel 101 extends along a second direction Y. The first accommodating cavity 102 and the oil drain channel 101 are connected at the intersection. The first direction X and the second direction Y intersect, and are preferably perpendicular to each other.

[0032] Furthermore, the valve core 2 includes a connected ball valve 21 and a valve stem 22. The ball valve 21 is located at the connection between the oil drain channel 101 and the first accommodating chamber 102, and the valve stem 22 is disposed within the first accommodating chamber 102. The ball valve 21 has an open position, which opens the oil drain channel 101, and a closed position, which closes the oil drain channel 101.

[0033] Specifically, if Figure 3 and Figure 8 As shown, the ball valve 21 is provided with a through hole 210 in the radial direction. When in the open position, the through hole 210 of the ball valve 21 extends along the second direction Y to communicate with the oil drain channel 101, so that the oil drain channel 101 is open; when in the closed position, the through hole 210 of the ball valve 21 deviates from the second direction Y to be disconnected from the oil drain channel 101, so that the oil drain channel 101 is closed.

[0034] Furthermore, at least part of the handle 3 is located within the first accommodating cavity 102 and is connected to the valve stem 22; at least part of the handle 3 is located outside the first accommodating cavity 102. The handle 3 is rotatably arranged and is adapted to drive the ball valve 21 to rotate between an open position and a closed position via the valve stem 22 when rotated.

[0035] Furthermore, the elastic member 4 is located within the first accommodating cavity 102 and is telescopically disposed between the valve body 1 and the handle 3. In the closed position, the elastic member 4 is adapted to provide a restoring force to the handle 3, thereby pressing the handle 3 against the valve body 1. It will be appreciated that in the closed position, the elastic member 4 may be in a compressed or stretched state, as long as it can provide a restoring force to the handle 3 and press the handle 3 against the valve body 1.

[0036] In this embodiment, the ball valve 21 is rotated between the open and closed positions by turning the handle 3, thereby changing the engine oil. In the closed position, the elastic member 4 presses the handle 3 against the valve body 1 to prevent rotation of the handle 3 due to vibration or other factors, which could cause the oil drain passage 101 to open accidentally. When maintenance is required, the handle 3 is used to rotate the ball valve 21 to the open position, opening the oil drain passage 101 and allowing the oil pan 20 to drain the waste oil through the oil drain passage 101. After the waste oil has been drained, the handle 3 is used to rotate the ball valve 21 to the closed position, and the elastic member 4 presses the handle 3 against the valve body 1, closing the oil drain passage 101.

[0037] By utilizing the technical solution of the present invention, there is no need to remove the oil drain plug and the sealing gasket during maintenance. It can be achieved by simply turning the handle 3, which saves maintenance costs, is simple and convenient to operate, and has high maintenance efficiency. Moreover, under the action of the elastic member 4, the handle 3 is prevented from opening the oil drain channel 101 without human operation, thereby ensuring the reliability of the application.

[0038] In some embodiments, as Figures 2 to 4 As shown, the valve body 1 includes a first valve body 11 and a first baffle 12 provided in the first valve body 11 . The first valve body 11 and the first baffle 12 together form a first accommodating chamber 102 .

[0039] Furthermore, the valve stem 22 extends through the first accommodating cavity 102 along the first direction X. The valve stem 22 has opposing first and second ends 221 and 222 along the first direction X. The valve stem 22 extends through the handle 3 along the first direction X, with the first and second ends 221 and 222 of the valve stem 22 positioned on either side of the handle 3. The first end 221 is connected to the ball valve 21, while the second end 222 is positioned between the handle 3 and the first baffle 12. The elastic member 4 is sleeved around the second end 222. In the closed position, the elastic member 4 is compressed between the first baffle 12 and the handle 3, providing a restoring force to the handle 3. That is, in this embodiment, in the closed position, the elastic member 4 is compressed, pressing the handle 3 away from the first baffle 12 to secure the handle 3 to the first valve body 11. This arrangement allows both the handle 3 and the elastic member 4 to be sleeved around the valve stem 22, ensuring that the restoring force of the elastic member 4 acts on the handle 3. This is a simple and reliable arrangement.

[0040] Furthermore, in some embodiments, the valve body 1 further includes a second baffle 13, which is located within the first accommodating cavity 102 and sleeved around the first end 221 of the valve stem 22. The handle 3 is movably disposed between the first baffle 12 and the second baffle 13 along the first direction X. In the open position, the second baffle 13 abuts the handle 3; in the closed position, the second baffle 13 is disengaged from the handle 3.

[0041] As can be understood, the elastic member 4 is sleeved around the second end 222 of the valve stem 22, and this second end 222 is positioned between the handle 3 and the first baffle 12. In other words, the elastic member 4 is telescopically disposed between the handle 3 and the first baffle 12. In the open position, the second baffle 13 abuts the handle 3, limiting the position of the handle 3 to ensure that the through-hole 210 of the ball valve 21 is aligned with the oil drain passage 101. In the closed position, the handle 3 moves away from the second baffle 13, compressing the elastic member 4 between the first baffle 12 and the handle 3, thereby firmly securing the handle 3 to the first valve body 11.

[0042] In some embodiments, as Figure 5 As shown, the first valve body 11 is provided with a first annular boss 111 and a second annular boss 112. The first annular boss 111 and the second annular boss 112 are located within the first accommodating cavity 102 and spaced apart along the first direction X. The first baffle 12 is disposed on the first annular boss 111, and the second baffle 13 is disposed on the second annular boss 112. In this embodiment, the first and second baffles 12 and 13 are arranged by the first and second annular bosses 111 and 112, facilitating assembly.

[0043] Furthermore, in some embodiments, Figure 4 As shown, the oil drain plug further includes a retaining spring 5. The first valve body 11 further includes a first annular retaining groove 113, which is located on the side of the first annular boss 111 away from the second annular boss 112. The retaining spring 5 is engaged within the first annular retaining groove 113 and securely clamps the first baffle 12 to the first annular boss 111. In this embodiment, the retaining spring 5 limits the first baffle 12, elastic member 4, handle 3, second baffle 13, and valve core 2 in the first direction X, ensuring that the first baffle 12, elastic member 4, handle 3, second baffle 13, and valve core 2 are securely mounted within the first valve body 11, further enhancing assembly convenience.

[0044] It can be understood that the shape structure of the first baffle 12 and the second baffle 13 depends on the shape structure of the first accommodating cavity 102. For example, the first accommodating cavity 102 is a cylindrical cavity, the first baffle 12 is a circular plate structure, and the second baffle 13 is an annular plate structure.

[0045] In some embodiments, the drain plug further includes a first seal 6, which is sleeved on the first end 221 of the valve stem 22 and seals with the inner wall of the first accommodating cavity 102 to ensure the sealing of the drain plug and prevent oil leakage. Figure 9As shown, the first end 221 of the valve stem 22 is provided with a second annular groove 2211, which is located on a side of the second baffle 13 away from the handle 3. The first sealing member 6 is sleeved within the second annular groove 2211 and abuts against the first valve body 11. For example, the first sealing member 6 may be a sealing ring, and may be made of rubber or a combination of rubber and metal.

[0046] Furthermore, in some embodiments, the first valve body 11 is provided with an opening 110 that communicates with the first accommodating cavity 102. The opening 110 extends circumferentially around the first valve body 11. At least a portion of the handle 3 extends into the first accommodating cavity 102 through the opening 110 and is connected to the valve stem 22. The length of the opening 110 around the circumference of the first valve body 11 is greater than the width of the handle 3, enabling the handle 3 to rotate along the opening 110. Furthermore, along the first direction X, the width of at least a portion of the opening 110 is greater than the thickness of the handle 3, enabling the handle 3 to move along the first direction X. In this embodiment, the provision of the opening 110 enables the handle 3 to rotate and move along the first direction X.

[0047] It can be understood that the first direction X is the extension direction of the first accommodating cavity 102, that is, the extension direction of the first valve body 11, and the circumference of the first valve body 11 extends around the first direction X. In some cases, the first valve body 11 is cylindrical, the first direction X is the axial direction of the first valve body 11, and the circumference of the first valve body 11 is the circumferential direction around the first direction X.

[0048] It can be understood that the length of the opening 110 refers to the dimension of the opening 110 in the circumferential direction around the first valve body 11, and the width of the opening 110 refers to the dimension of the opening 110 in the first direction X. The width of the handle 3 refers to the dimension of the handle 3 in the circumferential direction of the first valve body 11, and the thickness of the handle 3 refers to the dimension of the handle 3 in the first direction X.

[0049] Specifically, if Figure 5 and Figure 6 As shown, the opening 110 includes a first opening 1101 and a second opening 1102. The first opening 1101 and the second opening 1102 extend around the circumference of the first valve body 11 and are connected. In the first direction X, the width of the first opening 1101 is greater than the width of the second opening 1102 and greater than the thickness of the handle 3, so that the bottom wall of the second opening 1102 is higher than the bottom wall of the first opening 1101 in the first direction X.

[0050] like Figures 2 to 4 As shown, Figures 2 to 4The ball valve 21 is shown in the open position. In the open position, the handle 3 is located at the first opening 1101. The elastic member 4 can be in a compressed state or in a natural state. When switching from the open position to the closed position, the handle 3 is lifted upward in the first direction X and rotated to the second opening 1102. At this point, the elastic member 4 is compressed, that is, in a compressed state. Under the action of the restoring force of the elastic member 4, the handle 3 is pressed against the bottom wall of the second opening 1102.

[0051] It can be understood that the first opening 1101 and the second opening 1102 are both formed on the first valve body 11 , so that the bottom wall at the first opening 1101 and the bottom wall at the second opening 1102 are both formed on the first valve body 11 .

[0052] In some embodiments not shown, the handle 3 may also be located at the second opening 1102 when in the open position, and the handle 3 may also be located at the first opening 1101 when in the closed position.

[0053] It can be understood that in the above embodiment, the valve stem 22 serves as a connection between the ball valve 21 and the handle 3, so that the ball valve 21 can be driven to rotate when the handle 3 rotates.

[0054] The present invention does not specifically limit the connection method between the ball valve 21 and the valve stem 22. The ball valve 21 and the valve stem 22 can be integrally formed or separately formed. When the ball valve 21 and the valve stem 22 are separately formed, they can be connected by welding, clamping, etc.

[0055] For example, Figure 8 and Figure 9 As shown, the ball valve 21 and valve stem 22 are separate components for easy assembly. The first end 221 of the valve stem 22 is provided with a protrusion 2212. Correspondingly, the ball valve 21 is provided with a groove 211 that matches the shape of the protrusion 2212. The protrusion 2212 engages with the groove 211. It is understood that the cross-sectional profiles of the groove 211 and the protrusion 2212 are both non-circular structures to enable the valve stem 22 to drive the ball valve 21 to rotate. For example, the protrusion 2212 can be configured as a rectangular block, and the groove 211 can be configured as a rectangular slot.

[0056] The present invention does not specifically limit the connection method between the handle 3 and the valve stem 22. The handle 3 and the valve stem 22 can be integrally formed or separately formed. When the handle 3 and the valve stem 22 are separately formed, they can be connected by welding, clamping, etc.

[0057] For example, Figure 2As shown, the handle 3 and the valve stem 22 are separate components for easy assembly. The handle 3 includes a connecting portion 31 and a gripping portion 32. The connecting portion 31 extends through the opening 110 into the first accommodating chamber 102 and connects to the valve stem 22. The gripping portion 32 is located outside the first accommodating chamber 102. The opening 110 can be a first opening 1101 or a second opening 1102. Specifically, the connecting portion 31 is provided with a through-hole extending along the first direction X. The shape of the through-hole matches the shape of the second end 222 of the valve stem 22. The second end 222 of the valve stem 22 is inserted into the through-hole and engages with the connecting portion 31 through the through-hole. It is understood that the cross-sectional profiles of the through-hole and the second end 222 are both non-circular structures, enabling the handle 3 to rotate the valve stem 22, thereby driving the rotation of the ball valve 21. For example, the through-hole can be configured as a rectangular hole, and accordingly, the second end 222 can be configured as a rectangular rod.

[0058] Furthermore, in some embodiments, Figure 2 and Figure 3 As shown, the valve body 1 includes a second valve body 14 and a third valve body 15. The second valve body 14 and the third valve body 15 are connected and together form an oil drain passage 101 and a second accommodating chamber 103. The oil drain passage 101 penetrates the second valve body 14 and the third valve body 15 along the second direction Y. The second accommodating chamber 103 is formed at the connection between the second valve body 14 and the third valve body 15 and connects the oil drain passage 101 and the first accommodating chamber 102. The ball valve 21 is located in the second accommodating chamber 103. In this embodiment, the second valve body 14 and the third valve body 15 are arranged separately to facilitate the installation of the ball valve 21 in the second accommodating chamber 103, thereby facilitating the assembly of the oil drain plug.

[0059] The second valve body 14 is used to connect the first valve body 11 and the third valve body 15. For example, the first valve body 11 and the second valve body 14 can be integrally formed to simplify the assembly process of the oil drain plug. For example, the second valve body 14 and the third valve body 15 can be fixedly connected or detachably connected.

[0060] Preferably, the second valve body 14 and the third valve body 15 are detachably connected to facilitate assembly and disassembly of components in the valve body 1. For example, the second valve body 14 and the third valve body 15 can be connected by threads or by clamping.

[0061] The first valve body 11, the second valve body 14, and the third valve body 15 can all be manufactured using molds to facilitate mass production and reduce costs. For example, the first valve body 11, the second valve body 14, and the third valve body 15 can be metal parts and formed using mold casting. For example, the first valve body 11, the second valve body 14, and the third valve body 15 can also be plastic parts and be molded using low-pressure injection molding to facilitate lightweighting.

[0062] Furthermore, in some embodiments, the oil drain plug further includes two valve seats 7 , which are located within the second accommodating cavity 103 and on either side of the ball valve 21 along the second direction Y. The valve seats 7 are provided with arcuate concave surfaces on the sides facing the ball valve 21 . The ball valve 21 can closely mate with the arcuate concave surfaces of the two valve seats 7 to ensure the reliability of the valve core 2 and prevent oil leakage.

[0063] Furthermore, in some embodiments, the drain plug further includes a second sealing member 8, which is sealed and fitted at the connection between the second valve body 14 and the third valve body 15 to further ensure the sealing performance of the drain plug. Figure 7 As shown, the end of the third valve body 15 proximate to the second valve body 14 is inserted into the second valve body 14, and a third annular groove 151 is defined on the end of the third valve body 15 proximate to the second valve body 14. The second sealing member 8 is sleeved in the third annular groove 151 and abuts against the inner wall of the second valve body 14. For example, the second sealing member 8 may be a sealing ring, and the second sealing member 8 may be made of rubber or a combination of rubber and metal.

[0064] In some embodiments, as Figure 1 As shown, the oil drain plug also includes a tube 9, which is connected to the end of the third valve body 15 away from the second valve body 14 and communicates with an oil drain passage 101. During maintenance, waste oil can flow through the oil drain passage 101 into the tube 9, which then directs the waste oil into the oil collection barrel. This prevents spillage, which could pollute the environment or injure the operator, further improving the convenience and reliability of maintenance.

[0065] The present invention does not impose any specific restrictions on the connection method between the tube body 9 and the third valve body 15. The two can be fixedly connected or detachably connected. Specifically, the tube body 9 is connected to the end of the third valve body 15 away from the second valve body 14, and the two can be fixedly connected by welding, bonding, etc., or detachably connected by threaded connection, clamping, etc.

[0066] Exemplarily, the oil drain plug includes a clamp 10 , and the tube body 9 is sleeved on the outside of the third valve body 15 . The clamp 10 is sleeved on the outside of the tube body 9 and clamps the tube body 9 to the third valve body 15 .

[0067] For example, the tube body 9 can be a hose for easy storage, wherein the length of the tube body 9 can be adaptively adjusted according to actual conditions.

[0068] Furthermore, the oil drain plug is installed on the oil pan 20 through the valve body 1, wherein the valve body 1 can be directly connected to the through hole of the oil pan 20, or indirectly connected to the through hole of the oil pan 20 through other structures.

[0069] In some embodiments, the oil sump structure further includes a connector 30, through which the oil drain plug is connected to the through-hole of the oil sump 20. Specifically, the connector 30 is fixedly connected to the through-hole of the oil sump 20, and the valve body 1 of the oil drain plug is detachably connected to the connector 30, specifically, the second valve body 14 is detachably connected to the connector 30, so that the oil drain plug can be replaced if it is damaged.

[0070] For example, the connector 30 may be an annular structure with internal threads. At least a portion of the connector 30 extends through the through-hole and is welded to the through-hole wall. The end of the second valve body 14, distal from the third valve body 15, is provided with an externally threaded section that connects to the internal threads of the connector 30, thereby securing the oil drain plug to the oil pan 20. This provides a simple and reliable assembly method.

[0071] In some embodiments, the oil pan structure further includes a third seal 40 , which is sealingly fitted at the connection between the connector 30 and the oil drain plug to ensure sealing between the connector 30 and the oil drain plug.

[0072] Specifically, if Figure 1 As shown, the connecting member 30 and the second valve body 14 of the oil drain plug are sequentially arranged and connected along the first direction X, and the third sealing member 40 abuts between the connecting surface of the connecting member 30 and the oil drain plug, specifically, the third sealing member 40 abuts between the connecting surface of the connecting member 30 and the second valve body 14. For example, the third sealing member 40 can be sleeved on the outside of the second valve body 14, specifically, on the outside of the end of the second valve body 14 away from the third valve body 15. For example, as Figure 3 As shown, a fourth annular groove 141 is provided on the outer side of the end of the second valve body 14 away from the third portion. The third sealing member 40 can be sleeved in the fourth annular groove 141. For example, the third sealing member 40 can be a sealing ring. The sealing ring can be made of rubber or a combination of rubber and metal.

[0073] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. An oil drain plug for mounting on an oil pan (20), characterized in that: include: A valve body (1), wherein an oil drain passage (101) and a first accommodating chamber (102) are provided in the valve body (1), wherein the oil drain passage (101) is used to communicate with the interior of the oil pan (20), and the oil drain passage (101) intersects and communicates with the first accommodating chamber (102); The valve core (2) comprises a ball valve (21) and a valve stem (22) connected to each other; the ball valve (21) is located at the connection between the oil discharge channel (101) and the first accommodating chamber (102), and the valve stem (22) is arranged in the first accommodating chamber (102); the ball valve (21) has an open position for opening the oil discharge channel (101) and a closed position for closing the oil discharge channel (101); a handle (3), at least part of which is located in the first accommodating cavity (102) and connected to the valve stem (22); the handle (3) is rotatably arranged and is adapted to drive the ball valve (21) to rotate between an open position and a closed position via the valve stem (22) when rotating; An elastic member (4) is located in the first accommodating cavity (102) and is telescopically arranged between the valve body (1) and the handle (3); when in the closed position, the elastic member (4) is suitable for providing a restoring force to the handle (3) to press the handle (3) against the valve body (1).

2. The oil drain plug according to claim 1, characterized in that: The valve body (1) comprises a first valve body (11) and a first baffle (12) arranged in the first valve body (11), wherein the first valve body (11) and the first baffle (12) together form the first accommodating cavity (102); Along a first direction (X), the valve stem (22) passes through the handle (3) and has a first end (221) and a second end (222) respectively located on both sides of the handle (3); the first end (221) is connected to the ball valve (21), the second end (222) is located between the handle (3) and the first baffle (12), and the elastic member (4) is sleeved on the second end (222); When in the closed position, the elastic member (4) is compressed between the first baffle (12) and the handle (3) to provide a restoring force to the handle (3); Wherein, the first direction (X) is the extension direction of the first accommodating cavity (102).

3. The oil drain plug according to claim 2, characterized in that: The valve body (1) further includes a second baffle (13), the second baffle (13) being located in the first accommodating cavity (102) and sleeved on the first end (221); The handle (3) is movably arranged between the first baffle (12) and the second baffle (13) along a first direction (X); in an open position, the second baffle (13) abuts against the handle (3); in a closed position, the second baffle (13) is separated from the handle (3).

4. The oil drain plug according to claim 3, characterized in that: The first valve body (11) is provided with an opening (110) communicating with the first accommodating cavity (102); the opening (110) extends circumferentially around the first valve body (11); at least a portion of the structure of the handle (3) extends into the first accommodating cavity (102) through the opening (110) and is connected to the valve stem (22); Around the circumference of the first valve body (11), the length of the opening (110) is greater than the width of the handle (3), so that the handle (3) can rotate along the opening (110); and along the first direction (X), the width of at least a part of the structure of the opening (110) is greater than the thickness of the handle (3), so that the handle (3) can move along the first direction (X).

5. The oil drain plug according to claim 3, characterized in that: The first valve body (11) is provided with a first annular boss (111) and a second annular boss (112); the first annular boss (111) and the second annular boss (112) are located in the first accommodating cavity (102) and are spaced apart along a first direction (X); the first baffle (12) is provided on the first annular boss (111), and the second baffle (13) is provided on the second annular boss (112); or, The oil drain plug further comprises a retaining spring (5), and the first valve body (11) is further provided with a first annular retaining groove (113), the first annular retaining groove (113) being located on a side of the first annular boss (111) away from the second annular boss (112); the retaining spring (5) is engaged in the first annular retaining groove (113), and clamps and fixes the first baffle (12) on the first annular boss (111); or, The oil drain plug further comprises a first sealing member (6), which is sleeved on the first end (221) of the valve stem (22) and sealably cooperates with the inner wall of the first accommodating cavity (102).

6. The oil drain plug according to any one of claims 1 to 5, characterized in that: The valve body (1) comprises a second valve body (14) and a third valve body (15); the second valve body (14) is connected to the third valve body (15), and together they form the oil discharge passage (101) and the second accommodating chamber (103); the oil discharge passage (101) passes through the second valve body (14) and the third valve body (15) along a second direction (Y); the second accommodating chamber (103) is formed at the connection between the second valve body (14) and the third valve body (15), and communicates with the oil discharge passage (101) and the first accommodating chamber (102); the ball valve (21) is located in the second accommodating chamber (103); or, The oil drain plug further comprises two valve seats (7), the two valve seats (7) being located in the second accommodating cavity (103) and respectively located on both sides of the ball valve (21) along the second direction (Y); a side of the valve seat (7) facing the ball valve (21) is provided with an arc-shaped concave surface; or, The oil drain plug further comprises a second sealing member (8), wherein the second sealing member (8) is sealingly fitted at the connection between the second valve body (14) and the third valve body (15); The second direction (Y) is the extension direction of the oil discharge channel (101).

7. The oil drain plug according to claim 6, characterized in that The oil drain plug further comprises a tube body (9), the tube body (9) being connected to an end of the third valve body (15) away from the second valve body (14), and the tube body (9) being in communication with the oil drain passage (101).

8. An oil pan structure, characterized in that: include: Oil sump (20); The oil drain plug according to any one of claims 1 to 7, wherein the oil drain plug is connected to the oil pan (20).

9. The oil sump structure according to claim 8, characterized in that: The oil pan structure further comprises a connecting piece (30), a through hole is provided at the bottom of the oil pan (20), and the connecting piece (30) is fixedly connected to the through hole of the oil pan (20); the oil drain plug is detachably connected to the connecting piece (30); or, The oil pan structure further comprises a third sealing member (40), wherein the third sealing member (40) is sealingly fitted at the connection between the connecting member (30) and the oil drain plug.

10. An engine, characterized in that: include: The oil drain plug according to any one of claims 1 to 7; Alternatively, the oil sump structure as claimed in claim 8 or 9.

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