Plastic oil pan of engine

Abstract

The utility model is suitable for the technical field of engine oil pans, and particularly relates to an engine plastic oil pan which comprises a plastic oil pan, an oil pan installation end face is arranged at the opening position of the plastic oil pan, and a plurality of first installation through holes are formed in the surface of the oil pan installation end face. And a metal lining is arranged in the first mounting through hole. According to the plastic oil pan, the internal reinforcing ribs and the hollow cylinder located in the central area in the plastic oil pan are arranged, so that the product defect that the plastic oil pan shrinks inwards due to the fact that the wall thickness is too large after injection molding is avoided, and in the using process of the plastic oil pan, the durability and creep deformation reliability of the plastic oil pan are greatly improved, and the service life of the plastic oil pan is prolonged. And therefore, the dimensional stability of the oil pan can be ensured for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of engine oil pans, in particular to an engine plastic oil pan. Background Art

[0002] The engine oil pan is an important functional component of the car as a storage room for lubricating oil. The existing engine oil pan is developing in the direction of low cost and light weight, so the plastic oil pan with excellent performance has gradually been put into the production lines of many brands of cars.

[0003] There are various kinds of plastic engine oil pans on the market, but these plastic engine oil pans generally have a technical defect, that is, the oil pan will shrink inward after injection molding, and the inward shrinkage phenomenon of the above-mentioned product will become more and more obvious due to long-term creep during use in the application environment. This deterioration phenomenon will also cause the flatness of the installation surface of the oil pan to deteriorate, and then there will be leakage at the contact surface between the oil pan and the engine cylinder block. Utility Model Content

[0004] The purpose of the embodiment of the utility model is to provide a plastic oil pan of an engine, aiming to solve the technical problems mentioned in the background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] An engine plastic oil pan, comprising a plastic oil pan, an oil pan mounting end face is arranged at an opening position of the plastic oil pan, a surface of the oil pan mounting end face is provided with a plurality of first mounting through holes, a metal bushing is arranged inside the first mounting through hole, and an end face of the metal bushing is higher than a surface of the oil pan mounting end face;

[0007] The surface of the oil pan mounting end face is provided with an annular first mounting groove, and an annular sealing ring is arranged inside the first mounting groove;

[0008] A second mounting through hole is provided on the outer side of the plastic oil pan, and a through pipe is provided inside the second mounting through hole, a T-shaped nut is connected inside the through pipe, and a drain plug is detachably connected inside the T-shaped nut, and an O-ring is sleeved on the outer side of the T-shaped nut.

[0009] Furthermore, the metal bushing protrudes from the surface of the mounting end face of the oil pan by 0.1 mm-1.5 mm.

[0010] Furthermore, the top of the annular sealing ring is arranged as a double-rib structure, and the bottom is arranged as a flat structure.

[0011] Furthermore, the outer side of the plastic oil pan is provided with external reinforcing ribs, and the inner side of the plastic oil pan is provided with internal reinforcing ribs.

[0012] Furthermore, a reinforcement support seat is provided on the side of the plastic oil pan.

[0013] Furthermore, a second mounting groove is provided on the lower side of the oil drain plug, and a first sealing member is installed inside the second mounting groove, and the first sealing member is placed between the oil drain plug and the T-nut. A third mounting groove is provided at one end of the through pipe, and a second sealing member is installed inside the third mounting groove, and the second sealing member is placed between the through pipe and the T-nut.

[0014] Furthermore, a hollow cylinder is arranged inside the plastic oil pan, and the hollow cylinder is connected to the internal reinforcing ribs in the plastic oil pan.

[0015] Furthermore, a magnet block is installed inside the oil drain plug.

[0016] The utility model provides a plastic engine oil pan, which has the following beneficial effects:

[0017] By providing internal reinforcing ribs and a hollow cylinder located in the central area of ​​the plastic oil pan, the structural strength of the plastic oil pan can be improved, and it can be ensured that the plastic oil pan will not have product defects such as shrinkage due to excessive wall thickness after injection molding. During the use of the plastic oil pan, its durable creep reliability is greatly improved, thereby ensuring the dimensional stability of the oil pan for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a schematic diagram of the structure of a plastic oil pan of an engine.

[0019] Figure 2 This is a partial tangent view of the back side of a plastic engine oil pan.

[0020] Figure 3 A plastic oil pan for an engine Figure 2 Enlarged view of point A.

[0021] Figure 4 The present invention is a schematic structural diagram of an oil drain plug, a first sealing member, a T-shaped nut and a through pipe in a plastic oil pan of an engine in a disassembled state.

[0022] Figure 5 The figure is a schematic diagram of the bottom structure of a plastic oil pan of an engine.

[0023] In the figure: 1. plastic oil pan; 2. oil pan mounting end face; 3. annular sealing ring; 4. metal bushing; 5. external reinforcing ribs; 6. internal reinforcing ribs; 7. reinforced support seat; 8. first mounting groove; 9. drain plug; 10. first sealing member; 11. T-nut; 12. second sealing member; 13. through pipe. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0025] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0026] like Figure 1-Figure 5 As shown, an engine plastic oil pan provided by an embodiment of the utility model comprises a plastic oil pan 1, an oil pan mounting end face 2 is arranged at the opening position of the plastic oil pan 1, and a plurality of first mounting through holes are opened on the surface of the oil pan mounting end face 2, a metal bushing 4 is arranged inside the first mounting through hole, and the end face of the metal bushing 4 is higher than the surface of the oil pan mounting end face 2, and the metal bushing 4 protrudes from the surface of the oil pan mounting end face 2 by 0.1mm-1.5mm, and by protruding the mounting surface of the metal bushing 4 by 0.1mm-1.5mm, it can be ensured that the connection between the plastic oil pan and the engine cylinder block is metal contact, thereby preventing the plastic oil pan from changing in size after durable environmental creep during use, and because the metal bushing 4 is a machined part, its size is stable, which can ensure the stability of the sealing compression rate, and the metal bushing 4 is "T"-shaped, and after the fixing bolts are installed, the fixing bolts are directly stressed on the bushing surface, which can prevent the fixing bolts from directly pressing on the plastic surface, thereby causing deformation or fracturing of the plastic;

[0027] The surface of the oil pan mounting end face 2 is provided with an annular first mounting groove 8, and an annular sealing ring 3 is arranged inside the first mounting groove 8. The top of the annular sealing ring 3 is a double-rib structure and the bottom is a flat structure. This sealing ring design can improve the sealing performance between the oil pan mounting end face 2 and the engine cylinder block. The preferred thickness of the annular sealing ring 3 is 4 mm and the height is 7.3 mm.

[0028] A second mounting through hole is provided on the outer side of the plastic oil pan 1, and a through pipe 13 is provided inside the second mounting through hole, a T-shaped nut 11 is connected inside the through pipe 13, and an oil drain plug 9 is detachably connected inside the T-shaped nut 11, and an O-ring is sleeved on the outer side of the T-shaped nut 11, thereby ensuring the sealing after hot plugging;

[0029] The drain plug 9 is threadedly connected with the T-nut 11, a second mounting groove is provided on the lower side of the drain plug 9, and a first sealing member 10 is installed inside the second mounting groove, and the first sealing member 10 is placed between the drain plug 9 and the T-nut 11, a third mounting groove is provided at one end of the through-tube 13, and a second sealing member 12 is installed inside the third mounting groove, and the second sealing member 12 is placed between the through-tube 13 and the T-nut 11, the drain plug 9 can be formed by a hot-insertion structure process, and when the plastic oil pan 1 is manufactured and injection-molded, the plastic oil pan 1 can be demoulded through the through-tube 13, the first sealing member 10 can be a sealing gasket or a sealing ring, and the second sealing member 12 can be a sealing gasket or a sealing ring, by arranging the first sealing member 10 and the second sealing member 12, when the T-nut 11 is placed inside the through-tube 13 and the drain plug 9 is placed inside the T-nut 11, the sealing effect of the opening of the through-tube 13 can be guaranteed to the greatest extent, and the lubricating oil can be prevented from overflowing through the through-tube 13.

[0030] Preferably, the outer side of the plastic oil pan 1 is provided with an external reinforcing rib 5, and the inner side of the plastic oil pan 1 is provided with an internal reinforcing rib 6, and the side of the plastic oil pan 1 is provided with a reinforcing support seat 7, and the inner side of the plastic oil pan 1 is provided with a hollow cylinder, and the hollow cylinder is connected to the internal reinforcing rib 6 in the plastic oil pan 1. By providing multiple groups of external reinforcing ribs 5, internal reinforcing ribs 6 and hollow cylinders provided in the central area of ​​the plastic oil pan 1, it can be ensured that after injection molding, the plastic oil pan 1 will not have product size defects due to shrinkage due to excessive wall thickness, and the size accuracy of the plastic oil pan 1 can be ensured;

[0031] Preferably, a magnet block is installed inside the oil drain plug 9. The purpose of providing the magnet block is to absorb and collect metal impurities at the bottom of the plastic oil pan 1, so that the metal impurities can be easily removed when the car is maintained and the oil drain plug 9 is replaced.

[0032] By providing a reinforced support seat 7, the strength of the plastic oil pan 1 can be ensured and the mode of the plastic oil pan 1 can be improved. By adopting the design of a reinforced support seat 7 between the plastic oil pan 1 and the flywheel housing, the structural strength of the connection can be improved.

[0033] In another embodiment of the present invention:

[0034] The plastic oil pan can also be used for large heavy trucks, and the internal structure of the plastic oil pan 1 in the present application can also adopt a layered progressive structure, which can not only meet the volume requirements but also ensure a simple mold structure and reduce mold costs;

[0035] By arranging multiple groups of internal reinforcing ribs 6 inside the plastic oil pan 1, it is possible to ensure that the product will not shrink after injection molding, ensure dimensional accuracy, and ensure product flatness, and it is also possible to ensure that the lubricating oil will not leak from the plastic oil pan 1.

[0036] Preferably, the annular sealing ring 3 can also adopt a structural layout with three ribs or a single rib seal on the top and one rib seal on the bottom, so as to further ensure its sealing effect, and a number of card points can also be set on the outside of the annular sealing ring 3. The function of the card points is to prevent the annular sealing ring 3 from falling off the plastic oil pan 1 during the production process, packaging process, and transportation process after the rubber sealing ring is installed, and to prevent the sealing ring from shaking left and right due to vertical extrusion during extrusion installation, resulting in unqualified compression rate of the sealing ring and thus causing long-term durable leakage after installation.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plastic engine oil pan, comprising a plastic oil pan (1), characterized in that: An oil pan mounting end face (2) is provided at the opening position of the plastic oil pan (1), and a plurality of first mounting through holes are provided on the surface of the oil pan mounting end face (2), a metal bushing (4) is provided inside the first mounting through hole, and an end face of the metal bushing (4) is higher than the surface of the oil pan mounting end face (2); The surface of the oil pan mounting end surface (2) is provided with an annular first mounting groove (8), and an annular sealing ring (3) is arranged inside the first mounting groove (8); A second mounting through hole is provided on the outer side of the plastic oil pan (1), and a through pipe (13) is provided inside the second mounting through hole, a T-shaped nut (11) is connected inside the through pipe (13), and an oil drain plug (9) is detachably connected inside the T-shaped nut (11), and an O-ring is sleeved on the outer side of the T-shaped nut (11); The outer side of the plastic oil pan (1) is provided with an external reinforcing rib (5), and the inner side of the plastic oil pan (1) is provided with an internal reinforcing rib (6); A hollow cylinder is arranged inside the plastic oil pan (1), and the hollow cylinder is connected to an internal reinforcing rib (6) in the plastic oil pan (1).

2. The engine plastic oil pan according to claim 1, characterized in that: The metal bushing (4) protrudes from the surface of the oil pan mounting end surface (2) by 0.1 mm to 1.5 mm.

3. The engine plastic oil pan according to claim 1, characterized in that: The top of the annular sealing ring (3) is arranged in a double-rib structure, and the bottom is arranged in a flat structure.

4. The engine plastic oil pan according to claim 1, characterized in that: A reinforcement support seat (7) is provided on the side of the plastic oil pan (1).

5. The engine plastic oil pan according to claim 1, characterized in that: A second mounting groove is provided on the lower side of the oil drain plug (9), and a first sealing member (10) is installed inside the second mounting groove. The first sealing member (10) is disposed between the oil drain plug (9) and the T-shaped nut (11). A third mounting groove is provided at one end of the through pipe (13), and a second sealing member (12) is installed inside the third mounting groove. The second sealing member (12) is disposed between the through pipe (13) and the T-shaped nut (11).

6. The engine plastic oil pan according to claim 1, characterized in that: A magnet block is installed inside the oil drain screw plug (9).

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