Oil pan structure and engine

Abstract

The utility model belongs to the technical field of engines, and particularly relates to an oil pan structure and an engine. The oil pan structure comprises an oil pan body, an oil drain hole is formed in the bottom of the oil pan body, and the oil pan structure comprises a screw plug seat and a screw plug. The screw plug seat is connected to the inner side of the bottom of the oil pan body and provided with a threaded hole, the threaded hole is communicated with the oil drainage hole, an oil drainage groove is formed in the bottom of the screw plug seat, the oil drainage groove and the oil pan body form an oil drainage channel, and the interior of the oil pan body is connected with the threaded hole through the oil drainage channel; the screw plug penetrates through the oil drainage hole and is in threaded connection with the threaded hole. According to the oil pan structure in the technical scheme, after oil is discharged from the oil pan body, engine oil is not prone to remaining in the oil pan body, the screw plug base is located in the oil pan body, occupied space of the bottom of the oil pan body is reduced, and the overall attractiveness of the structure cannot be affected.

Description

Technical Field

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

[0002] The oil pan, also known as the lower half of the crankcase, is located at the very bottom of the engine. Its primary function is to serve as the outer shell of the oil reservoir, protecting it from foreign matter and preventing it from entering the engine. It also collects and stores lubricating oil flowing back from the engine's various friction surfaces, ensuring the proper functioning of the lubrication system. Furthermore, the oil pan serves as a heat dissipator, dissipating some of the heat generated by the lubricating oil during use, thereby preventing oxidation and deterioration due to high temperatures.

[0003] In order to facilitate the smooth draining of old engine oil when the engine oil needs to be changed or the oil pan needs to be cleaned, an oil drain plug is provided on the oil pan. The oil drain plug is located at the bottom of the oil pan, making it convenient for the operator to unscrew and drain the old engine oil. In traditional oil pan designs, the plug seat is usually welded directly to the outer surface of the bottom of the oil pan. Although this design is simple, it occupies space at the bottom of the oil pan and affects the aesthetics of the overall structure. More importantly, in order to ensure that the oil pan has good sealing performance, the existing technology usually adopts a peripheral welding process to weld the outer periphery of the plug seat to the oil pan. However, this method has an obvious disadvantage: due to the height limitation of the plug seat, part of the engine oil below the height of the plug seat cannot be completely drained, which affects the oil draining effect and makes it impossible to completely remove the old engine oil when changing the engine oil, which may have an adverse effect on the lubrication effect of the engine.

[0004] Therefore, it is urgent to propose an oil pan structure and an engine to solve the above problems. Utility Model Content

[0005] The purpose of the present invention is to at least solve the problem of poor oil draining effect of the oil pan body. This purpose is achieved through the following technical solutions:

[0006] The first aspect of the present invention provides an oil pan structure, comprising:

[0007] a screw plug seat connected to the inner side of the bottom of the oil pan body, the screw plug seat having a threaded hole, the threaded hole communicating with the oil drain hole, an oil drain groove being provided at the bottom of the screw plug seat, the oil drain groove and the oil pan body forming an oil drain passage, the interior of the oil pan body being connected to the threaded hole via the oil drain passage;

[0008] A screw plug passes through the oil drain hole and is threadedly connected to the threaded hole.

[0009] By using the oil pan structure of the present technical solution, the oil drain groove at the bottom of the plug seat and the bottom of the oil pan body form an oil drain channel. Therefore, the engine oil on the surface of the oil pan body can enter the oil drain channel without being restricted by the height of the plug seat. When it is necessary to drain the oil, the plug is unscrewed from the plug seat. On the one hand, the engine oil can directly flow out of the oil pan body through the threaded hole and the oil drain hole. On the other hand, the engine oil at the bottom of the oil pan body enters the threaded hole through the oil drain channel and then flows out from the oil drain hole. In summary, after the oil pan body is drained, it is not easy for engine oil to remain inside it, and the plug seat is located inside the oil pan body, which reduces the space occupied by the bottom of the oil pan body and does not affect the overall aesthetics of the structure.

[0010] In addition, the oil pan structure of the present invention may also have the following additional technical features:

[0011] In some embodiments of the present invention, the screw plug seat includes a connecting sleeve and a base plate connected to each other, the base plate is arranged along the outer circumference of the connecting sleeve, the threaded hole is arranged on the connecting sleeve, the side of the base plate facing the oil pan body is in contact with the oil pan body, and the oil drain groove is arranged on the side of the base plate facing the oil pan body.

[0012] In some embodiments of the present invention, a plurality of oil drain grooves are provided, and the plurality of oil drain grooves are spaced apart along the circumference of the bottom plate.

[0013] In some embodiments of the present invention, the flow cross-section of the oil discharge channel is semicircular.

[0014] In some embodiments of the present invention, the screw plug includes a threaded portion and a screwing portion, the screwing portion is connected to the threaded portion, the threaded portion is threadedly connected to the threaded hole, and the screwing portion is located outside the bottom of the oil pan body.

[0015] In some embodiments of the present invention, a limiting portion is provided between the threaded portion and the screwing portion, the limiting portion is located outside the bottom of the oil pan body, and the limiting portion abuts against the oil pan body toward one side of the oil pan body.

[0016] In some embodiments of the present invention, the limiting portion is a protrusion arranged along the circumference of the screwing portion.

[0017] In some embodiments of the present invention, a sealing ring is provided on the screw plug, and the sealing ring is located between the limiting portion and the oil pan body.

[0018] In some embodiments of the present invention, the screw plug seat and the oil pan body are connected by welding.

[0019] The present invention also provides an engine, which includes the oil pan structure in the above embodiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present invention. The same reference numerals are used throughout the accompanying drawings to denote the same components. In the accompanying drawings:

[0021] Figure 1 Schematically shows an exploded view of an oil pan structure according to an embodiment of the present utility model;

[0022] Figure 2 The following schematically shows the structure of the screw plug seat according to an embodiment of the present invention at a certain viewing angle;

[0023] Figure 3 The figure schematically shows the structure of the screw plug seat according to the embodiment of the present invention from another perspective.

[0024] The reference numerals in the accompanying drawings represent the following:

[0025] 100, oil pan body; 110, oil drain hole;

[0026] 200, screw plug seat; 210, connecting sleeve; 211, threaded hole; 220, bottom plate; 221, oil drain tank;

[0027] 300, screw plug; 310, threaded portion; 320, screwing portion; 330, limiting portion; 340, positioning ring groove;

[0028] 400. Sealing ring. DETAILED DESCRIPTION

[0029] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0031] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0032] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," and the like. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped over, an element described as "below" or "beneath" another element or feature would then be oriented "above" or "above" the other element or feature. Thus, the example term "below" can encompass both above and below orientations.

[0033] Figure 1 An exploded view of an oil pan structure according to an embodiment of the present invention is schematically shown. Figure 2 The structure diagram of the screw plug seat 200 according to the embodiment of the present utility model at a certain viewing angle is schematically shown. Figure 3 The structure diagram of the screw plug seat 200 according to the embodiment of the present invention is schematically shown in another perspective. Figures 1 to 3As shown, the present invention provides an oil pan structure, comprising an oil pan body 100, with an oil drain hole 110 provided at the bottom of the oil pan body 100, a screw plug seat 200 and a screw plug 300. The screw plug seat 200 is connected to the inner side of the bottom of the oil pan body 100, and has a threaded hole 211, which is connected to the oil drain hole 110. The bottom of the screw plug seat 200 is provided with an oil drain groove 221, which forms an oil drain channel with the oil pan body 100. The interior of the oil pan body 100 is connected to the threaded hole 211 through the oil drain channel; the screw plug 300 passes through the oil drain hole 110 and is threadedly connected to the threaded hole 211.

[0034] By using the oil pan structure of the present technical solution, the oil drain groove 221 at the bottom of the plug seat 200 and the bottom of the oil pan body 100 form an oil drain channel. Therefore, the engine oil on the surface of the oil pan body 100 can enter the oil drain channel without being restricted by the height of the plug seat 200. When it is necessary to drain the oil, the plug 300 is unscrewed from the plug seat 200. On the one hand, the engine oil can directly flow out of the oil pan body 100 through the threaded hole 211 and the oil drain hole 110. On the other hand, the engine oil at the bottom of the oil pan body 100 enters the threaded hole 211 through the oil drain channel and then flows out of the oil drain hole 110. In summary, after the oil pan body 100 is drained, it is unlikely that there will be any engine oil remaining inside it. In addition, the plug seat 200 is located inside the oil pan body 100, which reduces the space occupied at the bottom of the oil pan body 100 and does not affect the overall aesthetics of the structure.

[0035] Furthermore, the screw plug seat 200 includes a connecting sleeve 210 and a base plate 220 connected to each other, the base plate 220 is arranged along the outer periphery of the connecting sleeve 210, the threaded hole 211 is arranged on the connecting sleeve 210, the side of the base plate 220 facing the oil pan body 100 is in contact with the oil pan body 100, and the oil drain groove 221 is arranged on the side of the base plate 220 facing the oil pan body 100.

[0036] The connecting sleeve 210 is a barrel-shaped structure, and its height is set according to the needs of use to ensure that the internal thread has a sufficient height so that it can be firmly connected to the screw plug 300. Optionally, the bottom plate 220 is annular, and its width is set according to the needs of use. It can be understood that the provision of the bottom plate 220 can effectively increase the structural strength of the screw plug seat 200, avoid the structural strength of the screw plug seat 200 being affected by the provision of the oil drain groove 221, and at the same time, increase the contact area between the screw plug seat 200 and the oil pan body 100, so that the screw plug seat 200 and the oil pan body 100 can be firmly connected. Optionally, the connection between the connecting sleeve 210 and the bottom plate 220 is transitioned through a rounded corner, thereby effectively avoiding stress concentration and effectively reducing the deformation or breakage of the screw plug seat 200 under stress. Optionally, the connecting sleeve 210 and the bottom plate 220 are an integrally formed structure.

[0037] Furthermore, a plurality of oil drain grooves 221 are provided, and the plurality of oil drain grooves 221 are arranged at intervals along the circumference of the bottom plate 220 .

[0038] Optionally, the oil drain groove 221 extends radially along the bottom plate 220, and a plurality of oil drain grooves 221 are radially distributed on the bottom of the bottom plate 220. Figure 2 and Figure 3 In this embodiment, the number of the oil drain grooves 221 is four, and the four oil drain grooves 221 are arranged at equal intervals. In other embodiments, the number of the oil drain grooves 221 can also be one, two, three or five, etc., which is not specifically limited here.

[0039] Furthermore, the oil drain channel has a semicircular cross-section, meaning that the cross-section of the oil drain groove 221 perpendicular to its axial direction is semicircular. As can be appreciated, this structural form of the oil drain groove 221 effectively reduces stress concentration, preventing deformation or cracking of the bottom plate 220 due to stress. In other embodiments, the cross-section of the oil drain groove 221 perpendicular to its axial direction can also be square, waist-shaped, or other shapes, without specific limitation, as long as the oil at the bottom of the oil sump body 100 can flow smoothly out.

[0040] Further, see Figure 1 The screw plug 300 includes a threaded portion 310 and a screwing portion 320 . The screwing portion 320 is connected to the threaded portion 310 . The threaded portion 310 is threadedly connected to the threaded hole 211 . The screwing portion 320 is located outside the bottom of the oil pan body 100 .

[0041] It is understandable that the threaded portion 310 is provided with an external thread. The external thread on the threaded portion 310 is connected to the internal thread on the threaded hole 211, which is reliable, easy to disassemble, and has good sealing performance, which can effectively prevent oil leakage.

[0042] Optionally, the screwing portion 320 is prismatic, so as to facilitate unscrewing the screw plug 300 from the screw plug seat 200 using a wrench.

[0043] Furthermore, a limiting portion 330 is provided between the threaded portion 310 and the screwing portion 320 . The limiting portion 330 is located outside the bottom of the oil pan body 100 , and the limiting portion 330 abuts against the oil pan body 100 toward one side of the oil pan body 100 .

[0044] It can be understood that the setting of the limiting portion 330 can play a limiting role. When the threaded portion 310 is completely screwed into the threaded hole 211, the limiting portion 330 will abut against the bottom of the oil pan body 100, thereby preventing the screw plug 300 from being screwed in too much.

[0045] Furthermore, the limiting portion 330 is a protrusion provided along the circumference of the screwing portion 320 .

[0046] In this embodiment, the protrusion is an annular protrusion structure, and its outer contour is circular. In other embodiments, the outer contour of the protrusion can also be oval, square or waist-shaped, etc., which is not specifically limited here.

[0047] Furthermore, a sealing ring 400 is sleeved on the screw plug 300 , and the sealing ring 400 is located between the limiting portion 330 and the oil pan body 100 .

[0048] In this embodiment, the radial cross-sectional shape of the sealing ring 400 is designed to be rectangular, while in other embodiments, the radial cross-sectional shape of the sealing ring 400 can also be selected to be circular. In addition, the material of the sealing ring 400 can be flexibly selected, including but not limited to natural rubber, silicone rubber, fluororubber, nitrile rubber or ethylene propylene rubber, etc. Through this design, the sealing ring 400 can effectively improve the sealing performance between the plug 300 and the oil pan body 100, thereby effectively preventing oil from leaking from the oil drain hole 110 of the oil pan body 100. During the actual assembly process, the sealing ring 400 is first sleeved onto the plug 300, then the plug 300 is screwed into the plug seat 200, and finally, the plug 300 is tightened to ensure that the sealing ring 400 is tightly pressed against the corresponding part of the oil pan body 100 to achieve the best sealing effect.

[0049] Optionally, a positioning ring groove 340 is provided between the threaded portion 310 and the limiting portion 330 , and the sealing ring 400 is located in the positioning ring groove 340 , thereby preventing the sealing ring 400 from moving.

[0050] Furthermore, the screw plug seat 200 and the oil pan body 100 are connected by welding.

[0051] In this technical solution, the bottom plate 220 of the screw plug seat 200 and the oil pan body 100 can be connected by welding. This connection method has high stability and reliability and can effectively prevent the screw plug seat 200 from loosening during use.

[0052] In traditional structural designs, the screw plug seat 200 usually adopts a full-circle welding method, that is, the entire outer periphery of the screw plug seat 200 is welded to the oil pan body 100. However, this welding method requires more areas to be welded, and the welding process is relatively complicated, which leads to higher welding costs. In addition, local high temperatures during the welding process may generate greater welding pressure on the welding parts of the oil pan body 100, which can easily cause cracks in the welding parts, and then cause leakage failures, affecting the overall reliability of the engine. However, in the present technical solution, by providing an oil drain groove 221, the generation of welding stress can be effectively reduced. The provision of the oil drain groove 221 helps to disperse the stress generated during the welding process, thereby reducing the risk of cracks in the welding parts.

[0053] Furthermore, the base plate 220 and the oil pan body 100 are preferably connected using spot welding. Spot welding results in a relatively small weld area, significantly reducing the risk of welding defects and improving the stability and reliability of the connection. To ensure a reliable connection, the number of weld points is optionally at least two. This further ensures a secure connection between the base plate 220 and the oil pan body 100, avoiding potential problems caused by a loose connection and thereby improving the stability and reliability of the entire engine system.

[0054] Furthermore, this embodiment also provides an engine, comprising the oil pan structure in the above embodiment.

[0055] In this engine, since the bottom of the plug seat 200 is provided with an oil drain groove 221, an effective oil drain channel is formed between the oil drain groove 221 and the oil pan body 100. When it is necessary to drain the oil, the plug 300 is unscrewed from the plug seat 200, and the oil originally stored in the oil pan body 100 can enter the threaded hole 211 through the oil drain channel, and then flow out smoothly through the threaded hole 211 and the oil drain hole 110. This structure prevents the oil from remaining at the bottom of the oil pan body 100, so that all the oil can be completely drained, avoiding the problem of oil residue. On the other hand, the plug seat 200 is arranged inside the oil pan body 100. This layout not only meets the functional requirements, but also does not affect the overall aesthetics of the oil pan structure. At the same time, it reduces the space occupied by the external space of the oil pan body 100.

[0056] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An oil pan structure, comprising an oil pan body (100), wherein the bottom of the oil pan body (100) is provided with an oil drain hole (110), characterized in that: The oil sump structure further includes: a screw plug seat (200), the screw plug seat (200) being connected to the inner side of the bottom of the oil pan body (100), the screw plug seat (200) having a threaded hole (211), the threaded hole (211) being in communication with the oil drain hole (110), an oil drain groove (221) being provided at the bottom of the screw plug seat (200), the oil drain groove (221) and the oil pan body (100) forming an oil drain passage, the interior of the oil pan body (100) being connected to the threaded hole (211) via the oil drain passage; A screw plug (300) passes through the oil drain hole (110) and is threadedly connected to the threaded hole (211).

2. The oil sump structure according to claim 1, characterized in that: The screw plug seat (200) comprises a connecting sleeve (210) and a bottom plate (220) connected to each other, wherein the bottom plate (220) is arranged along the outer periphery of the connecting sleeve (210), the threaded hole (211) is arranged on the connecting sleeve (210), the side of the bottom plate (220) facing the oil pan body (100) contacts the oil pan body (100), and the oil drain groove (221) is arranged on the side of the bottom plate (220) facing the oil pan body (100).

3. The oil sump structure according to claim 2, characterized in that: A plurality of the oil drain grooves (221) are provided, and the plurality of the oil drain grooves (221) are arranged at intervals along the circumference of the bottom plate (220).

4. The oil sump structure according to any one of claims 1 to 3, characterized in that: The flow cross section of the oil discharge channel is semicircular.

5. The oil sump structure according to any one of claims 1 to 3, characterized in that: The screw plug (300) comprises a threaded portion (310) and a screwing portion (320), wherein the screwing portion (320) is connected to the threaded portion (310), the threaded portion (310) is threadedly connected to the threaded hole (211), and the screwing portion (320) is located outside the bottom of the oil pan body (100).

6. The oil sump structure according to claim 5, characterized in that: A limiting portion (330) is provided between the threaded portion (310) and the screwing portion (320), and the limiting portion (330) is located outside the bottom of the oil pan body (100). The limiting portion (330) abuts against the oil pan body (100) on one side facing the oil pan body (100).

7. The oil sump structure according to claim 6, characterized in that: The limiting portion (330) is a protrusion arranged along the circumference of the screwing portion (320).

8. The oil sump structure according to claim 6, characterized in that: A sealing ring (400) is sleeved on the screw plug (300), and the sealing ring (400) is located between the limiting portion (330) and the oil pan body (100).

9. The oil sump structure according to any one of claims 1 to 3, characterized in that: The screw plug seat (200) and the oil pan body (100) are connected by welding.

10. An engine, characterized in that: The oil pan structure comprises the oil pan structure according to any one of claims 1 to 9.

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