Oil drainage structure and oil pan

Abstract

The utility model discloses an oil drainage structure and an oil pan, the oil drainage structure comprises a metal insert and a cover plate, the metal insert is embedded and cast at an oil drainage hole of the plastic oil pan; a through hole and a threaded hole are formed in the metal insert, the through hole is communicated with an oil drainage hole in the plastic oil pan, and a bolt is installed in the threaded hole to fix the cover plate to the oil drainage hole to plug the oil drainage hole. A sealing ring is arranged on the cover plate; according to the oil drainage structure provided by the embodiment, the plastic oil pan can be prevented from being twisted to be cracked due to overlarge assembling and disassembling torque; and meanwhile, the radial sealing rubber ring is adopted, so that the rubber ring is prevented from being rubbed when being tightened by the plug screw.

Description

Technical Field

[0001] The utility model relates to the technical field of engines and specifically to an oil drain structure and an oil pan. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] The oil pan is the part of the engine that stores lubricating oil. The lubricating oil needs to be replaced and maintained regularly as the vehicle runs over time. There is a corresponding oil drain structure on the oil pan to facilitate the release of the lubricating oil.

[0004] The traditional oil drain structure adopts a screw plug structure, and the seal adopts an O-ring for end face sealing. For example, Chinese utility model patent CN206221396U discloses an oil tank drain structure, in which the screw plug is installed in a threaded hole at the bottom of the oil tank, and the seal is tightened by tightening the screw plug to ensure reliable sealing. It is simple and convenient to remove the screw plug when draining the oil. The above structure is currently a commonly used oil drain structure. With the requirements of product lightweight and NVH performance, plastic oil pans are increasingly used. Due to the large specifications of the oil drain plug, the assembly and disassembly torque of the plug is often too large during use, resulting in cracks in the plastic part. In addition, due to the repeated disassembly and installation of the oil drain plug, the rubber ring of the end face seal has the problem of rubbing and cracking. Utility Model Content

[0005] The utility model aims to provide an oil drain structure and an oil pan, which can solve the problems of cracks in the plastic part of the existing oil drain structure and rubbing cracks in the rubber ring of the end face seal.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] In the first aspect, an embodiment of the utility model provides an oil drain structure, including a metal insert and a cover plate, wherein the metal insert is embedded in the oil drain hole of the plastic oil pan; a through hole and a threaded hole are provided on the metal insert, wherein the through hole is connected to the oil drain hole on the plastic oil pan, and bolts are installed in the threaded hole to fix the cover plate at the oil drain hole to seal the oil drain hole; a sealing ring is provided on the cover plate.

[0008] As a further technical solution, a groove is provided at the oil drain hole of the plastic oil pan, and a metal casting is embedded in the groove.

[0009] As a further technical solution, the through hole is eccentrically opened on the metal insert, and the diameter of the through hole is the same as the diameter of the oil drain hole on the plastic oil pan.

[0010] As a further technical solution, the threaded hole is eccentrically opened on the metal insert, and the depth of the threaded hole is less than the thickness of the metal insert.

[0011] As a further technical solution, the diameter of the cover plate is the same as the diameter of the metal insert, and a circular hole is arranged on the cover plate, and the circular hole corresponds to the threaded hole on the metal insert.

[0012] As a further technical solution, a cylindrical joint is provided at the bottom of the cover plate corresponding to the through hole of the metal insert, and the cylindrical joint is inserted into the through hole of the metal insert.

[0013] As a further technical solution, at least one annular groove is arranged on the outer wall surface of the cylindrical joint, and a sealing ring is inside the annular groove.

[0014] As a further technical solution, the diameter of the threaded hole on the metal insert is smaller than the diameter of the through hole.

[0015] As a further technical solution, the thickness of the metal insert is smaller than the thickness of the plastic oil pan.

[0016] In a second aspect, an embodiment of the present invention provides an oil pan, comprising the oil drain structure described in the first aspect.

[0017] The beneficial effects of the above-mentioned embodiments of the utility model are as follows:

[0018] The oil drain structure provided by the utility model can improve the strength of the oil drain hole of the plastic oil pan by embedding a metal insert at the oil drain hole of the plastic oil pan, setting a threaded hole on the metal insert, and fixing a cover plate with a cylindrical joint on the metal insert by bolts, thereby improving the strength of the oil drain hole of the plastic oil pan. At the same time, a bolt with a smaller specification is used for fixing, and the torque is smaller, which can prevent the plastic part from being damaged by tightening.

[0019] The oil drain structure provided by the utility model has a cylindrical joint arranged on the cover plate, and when the oil drain hole is blocked, it is only necessary to plug the cylindrical joint into the oil drain hole; at the same time, in order to ensure the sealing performance, an annular groove is arranged on the cylindrical joint for accommodating the sealing rubber ring, and the sealing is achieved by radially squeezing the sealing rubber ring by the through hole wall, thereby avoiding the rubber ring of the end face sealing in the original structure from being scratched and cracked when the screw plug is tightened. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 It is a schematic diagram of the oil discharge structure of the utility model;

[0022] Figure 2 This is a physical picture of the existing oil drain structure, which shows that the plastic oil pan is cracked due to excessive torque of screw plug installation and removal;

[0023] Figure 3 This is a physical picture of the existing oil drain structure sealing rubber ring with scratches and cracks.

[0024] The schematic diagram is for illustrative purposes only;

[0025] Among them, 1. bolt; 2. cover plate; 201. round hole; 202. cylindrical joint; 203. annular groove; 3. sealing ring; 4. metal insert; 401. threaded hole; 402. through hole; 5. plastic oil pan; 501. oil drain hole. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0027] Example 1

[0028] The background technology mentioned that the oil drain structure adopts a screw plug structure, but this structure causes cracks in the plastic part due to excessive disassembly torque, such as Figure 2 The picture shows the cracks on the plastic oil pan. The rubber ring of the end face seal has been scratched and cracked due to repeated disassembly and installation. Figure 3 shown.

[0029] In view of the problems existing in the existing oil discharge structure, in a typical implementation of the utility model, as Figure 1 As shown, an oil drain structure is provided, including a metal insert 4 and a cover plate 2, wherein the metal insert 4 is embedded in the oil drain hole 501 of the plastic oil pan 5; a through hole 402 and a threaded hole 401 are provided on the metal insert 4, wherein the through hole 402 is connected to the oil drain hole 501 on the oil pan 5, and a bolt 1 is installed in the threaded hole 401 to fix the cover plate 2 at the oil drain hole 501 to seal the oil drain hole 501; and a sealing ring 3 is provided on the cover plate 2.

[0030] In this embodiment, the metal insert 4 and the cover plate 2 can both adopt a cylindrical structure. Furthermore, a groove is provided at the oil drain hole 501 of the plastic oil pan 5. The size of the groove is the same as the size of the metal insert 4, so that the metal insert 4 is embedded in the groove. At the same time, the thickness of the metal insert 4 is less than the thickness of the plastic oil pan 5, so that the metal insert 4 is located in the plastic oil pan and forms an integrated structure with the plastic oil pan. By embedding the metal insert at the oil drain hole of the plastic oil pan, the strength of the plastic oil pan at the oil drain hole can be improved.

[0031] In this embodiment, the through hole 402 is eccentrically opened on the metal insert 4, and the diameter of the through hole 402 is the same as the diameter of the oil drain hole 501 on the plastic oil pan 5. When the metal insert 4 is embedded in the plastic oil pan 5, the through hole 402 on the metal insert 4 is connected with the oil drain hole 501 on the plastic oil pan 5, which will not affect the flow area of ​​the oil during the oil draining process.

[0032] Furthermore, the threaded hole 401 is eccentrically opened on the metal insert 4, the depth of the threaded hole 401 is less than the thickness of the metal insert 4, the cover plate 2 is fixedly mounted on the metal insert 4 by means of bolts 1, the strength of the metal insert 4 is better than the strength of the plastic, and the metal insert 4 is used as the mounting surface of the bolt, which will not affect the plastic oil pan during the tightening process.

[0033] In this embodiment, the diameter of the cover plate 2 is the same as that of the metal insert. A circular hole 201 is formed on the cover plate 2 , and the circular hole 201 corresponds to the threaded hole 401 on the metal insert 4 , so that the bolt 1 passes through the circular hole 201 and is installed in the threaded hole 401 .

[0034] In this embodiment, a cylindrical joint 202 is provided at the bottom of the cover plate 2 corresponding to the through hole 402 of the metal insert 4, and the outer wall surface of the cylindrical joint 202 is in contact with the inner wall surface of the through hole 402 on the metal insert 4. The cylindrical joint 202 is inserted into the through hole 402 of the metal insert 4 to achieve the blocking of the oil drain hole.

[0035] Furthermore, at least one annular groove 203 is provided on the outer wall surface of the cylindrical joint 202, and a sealing ring 3 is provided inside the annular groove 203. When the cylindrical joint 202 is inserted into the through hole 402 of the metal insert 4, the inner wall surface of the through hole 402 of the metal insert 4 squeezes the sealing ring 3 to achieve sealing.

[0036] In this embodiment, the sealing ring 3 is an O-shaped rubber sealing ring.

[0037] In this embodiment, the diameter of the threaded hole 401 on the metal insert 4 is smaller than the diameter of the through hole 402. In this way, a bolt with a smaller specification can be used to fix the cover plate. Compared with the existing screw plug structure directly set at the oil drain hole, the torque is smaller and the plastic parts can be prevented from being damaged by tightening.

[0038] In the oil draining structure provided in this embodiment, when draining the oil, it is only necessary to remove the bolt 1 and then pull the cylindrical joint 202 on the cover plate 2 out of the through hole 402 on the metal insert 4 .

[0039] The oil drain structure provided in this embodiment can prevent the plastic oil pan from being twisted and cracked due to excessive assembly and disassembly torque; at the same time, the radial sealing rubber ring is used to prevent the rubber ring from being rubbed when the screw plug is tightened.

[0040] Example 2

[0041] In a typical implementation of the present invention, an oil pan is provided, comprising the oil drain structure described in Example 1.

[0042] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An oil discharge structure, characterized in that: It comprises a metal insert and a cover plate, wherein the metal insert is embedded in the oil drain hole of the plastic oil pan; the metal insert is provided with a through hole and a threaded hole, the through hole is connected with the oil drain hole on the plastic oil pan, bolts are installed in the threaded hole to fix the cover plate at the oil drain hole to seal the oil drain hole; and a sealing ring is provided on the cover plate.

2. The oil discharge structure according to claim 1, characterized in that: A groove is arranged at the oil drain hole of the plastic oil pan, and a metal casting is embedded in the groove.

3. The oil discharge structure according to claim 1, characterized in that: The through hole is eccentrically formed on the metal insert, and the diameter of the through hole is the same as the diameter of the oil drain hole on the plastic oil pan.

4. The oil discharge structure according to claim 1, characterized in that: The threaded hole is eccentrically opened on the metal insert, and the depth of the threaded hole is less than the thickness of the metal insert.

5. The oil discharge structure according to claim 1, characterized in that: The diameter of the cover plate is the same as that of the metal insert. A circular hole is arranged on the cover plate, and the circular hole corresponds to the threaded hole on the metal insert.

6. The oil discharge structure according to claim 1, characterized in that: A cylindrical joint is arranged at the bottom of the cover plate corresponding to the through hole of the metal insert, and the cylindrical joint is inserted into the through hole of the metal insert.

7. The oil discharge structure according to claim 6, characterized in that: At least one annular groove is arranged on the outer wall surface of the cylindrical joint, and a sealing ring is arranged inside the annular groove.

8. The oil discharge structure according to claim 1, characterized in that: The diameter of the threaded hole on the metal insert is smaller than the diameter of the through hole.

9. The oil discharge structure according to claim 1, characterized in that: The thickness of the metal insert is less than the thickness of the plastic oil pan.

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

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