Oil pan for engine

The oil pan design of injection molded by fiber-reinforced thermoplastic composites solves the problems of large weight and high cost, achieves lightweight and noise reduction effects, and enhances oil storage and stiffness.

CN223282123UActive Publication Date: 2025-08-29BEIJING SINOMA COMPOSITE AUTO PARTS CO LTD
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Patent Information

Application Number
CN202422748389.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-12
Publication Date
2025-08-29
Estimated Expiration
2034-11-12

AI Technical Summary

Technical Problem

The existing engine oil pan has a large weight, high production cost, complex structure, and requires multiple components to be assembled, increasing manufacturing cost.

Method used

The oil pan design is designed with injection molding of fiber-reinforced thermoplastic composite materials, including deep oil storage areas, transition areas and shallow oil storage areas, with crisscrossing reinforcement ribs and sealing grooves, integrated oil drain inserts, and connected to the cylinder through mounting bolts.

Benefits of technology

It reduces the weight of the oil pan, reduces production costs and noise pollution, increases oil storage, simplifies molding and processing, and improves product stiffness and impact resistance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The embodiment of the utility model provides an oil pan for an engine. The oil pan comprises a deep oil storage area, a transition area and a shallow oil storage area, the installation faces of the deep oil storage area, the transition area and the shallow oil storage area are located on the same plane, the bottom face of the deep oil storage area and the bottom face of the transition area are in transition connection through a first vertical face, the bottom face of the transition area and the bottom face of the shallow oil storage area are in transition connection through a second vertical face, and the installation faces are opposite to the bottom face of the deep oil storage area. Crisscrossed reinforcing ribs are arranged on the outer surface of the bottom surface of the deep oil storage area, the outer surface of the bottom surface of the transition area and the outer surface of the bottom surface of the shallow oil storage area; a sealing groove is formed in the mounting surface, a mounting hole is formed in the outer side of the sealing groove, and a glue digging groove is formed in the lower end surface of the mounting hole and used for uniformizing the wall thickness; wherein the oil pan is formed by injection molding of a fiber reinforced thermoplastic composite material. The oil pan is simple in structure, the forming machining difficulty and the manufacturing cost are reduced, and compared with an oil pan with the same boundary dimension, the oil quantity of a loader is increased.
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Description

Technical Field

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

[0002] The removable oil pan, located at the bottom of the engine, seals the crankshaft oil pan and serves as an oil reservoir, preventing the ingress of impurities. It collects and stores lubricating oil returning from the engine's friction surfaces, dissipates some heat, and prevents lubricating oil oxidation. Currently, engine oil pans are primarily cast iron. While structurally stable, cast iron oil pans are heavy and complex, requiring disassembly into multiple components for assembly and connection. This not only incurs high mold design and manufacturing costs, but also requires additional steps for product assembly and molding, resulting in a costly manufacturing process.

[0003] It can be seen that in the prior art, the engine oil pan is heavy and has a high manufacturing cost. Utility Model Content

[0004] The purpose of the present invention is to provide an engine oil pan to reduce the weight of the oil pan and reduce the manufacturing cost. The specific technical solution is as follows:

[0005] An oil pan for an engine, comprising a deep oil storage area, a transition area, and a shallow oil storage area;

[0006] The mounting surfaces of the deep oil storage area, the transition area, and the shallow oil storage area are in the same plane, the bottom surface of the deep oil storage area and the bottom surface of the transition area are connected by a first vertical transition, the bottom surface of the transition area and the bottom surface of the shallow oil storage area are connected by a second vertical transition, the mounting surface and the bottom surface of the deep oil storage area are opposite, and the outer surfaces of the bottom surface of the deep oil storage area, the outer surfaces of the bottom surface of the transition area, and the outer surfaces of the bottom surface of the shallow oil storage area are provided with crisscross reinforcing ribs;

[0007] The mounting surface is provided with a sealing groove, a mounting hole is provided on the outside of the sealing groove, and a glue-removing groove is provided on the end surface below the mounting hole for uniform wall thickness. The number of the mounting holes is specifically 28, and the arrangement of the mounting holes is specifically 10 in each of the two long sides, and they are evenly arranged, and 4 in each of the two short sides;

[0008] A first oil drain hole is provided at a lower portion of a first side elevation of the deep oil storage area, a first oil drain insert and a first oil drain plug are fixed in the first oil drain hole, a second oil drain insert and a second oil drain plug are fixed in the second oil drain hole, a first convex structure is provided at a first side elevation of the deep oil storage area, and a second convex structure is provided at a second side elevation of the deep oil storage area for increasing the oil storage volume;

[0009] Wherein, the oil pan is injection-molded from fiber-reinforced thermoplastic composite material.

[0010] Optionally, the number of the first protruding structures is four, and the number of the second protruding structures is four.

[0011] Optionally, a rubber sealing gasket is installed in the sealing groove.

[0012] Optionally, a mounting bolt is installed in the mounting hole, and the oil pan is connected to the cylinder body through the mounting bolt.

[0013] Optionally, the mounting bolt includes a metal sleeve and a metal bolt, and the metal sleeve and the metal bolt are fixedly connected.

[0014] Optionally, the mounting bolt is fixed in the mounting hole by a limiting structure, or is fixed in the mounting hole by an interference fit, or is fixed in the mounting hole by bonding.

[0015] Optionally, outer surfaces of the first protruding structure and the second protruding structure are provided with crisscrossing reinforcing ribs.

[0016] Optionally, reinforcing ribs are provided at the bottom of the transition area and the shallow oil storage area to increase the strength of the oil pan.

[0017] Compared to existing technologies, the oil pan of this embodiment is injection-molded from a fiber-reinforced thermoplastic composite material, resulting in a simpler structure, reducing both the difficulty and cost of molding. The oil drain insert and other components are integrated into the injection-molded housing, forming the oil pan assembly. This significantly reduces product weight and reduces noise pollution during driving. Compared to oil pans of the same dimensions, this allows for increased loader oil capacity and a longer engine maintenance mileage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of an engine oil pan provided by the utility model;

[0020] Figure 2 This is a schematic top view of an embodiment of a high oil storage capacity oil pan for a medium-sized engine provided by the utility model;

[0021] in, Figures 1 to 2 The corresponding relationship between the component names and the corresponding reference numerals is as follows:

[0022] 11 deep oil storage area, 12 transition area, 13 shallow oil storage area;

[0023] 101 mounting surface, 102 first vertical surface, 103 second vertical surface, 104 sealing groove, 105 mounting hole, 106 glue removal groove, 107 reinforcing rib;

[0024] 111 bottom surface of the deep oil storage area, 112 first side elevation, 113 second side elevation, 114 first protruding structure, 115 second protruding structure, 116 first oil drain hole;

[0025] 121 bottom surface of transition zone;

[0026] 131 bottom surface of the shallow oil storage area, 132 first side elevation, 133 second side elevation, 134 second oil drain hole;

[0027] 2 first oil drain insert, 21 second oil drain insert;

[0028] 3 first oil drain plug, 31 second oil drain plug;

[0029] 4 rubber sealing gasket;

[0030] 5Install the bolts. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only 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 ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] It should be noted that the directional words "up" and "down", "top" and "bottom" in this embodiment are based on Figure 1 The positions of the illustrated oil sump embodiments are defined as references.

[0033] It should be understood that while the terms "first," "second," "third," and so forth, may be used herein to describe various facades, side facades, raised structures, oil drain holes, and oil drain inserts, these facades, side facades, raised structures, oil drain holes, and oil drain inserts should not be limited by these terms. These terms are used solely to distinguish one facade, side facade, raised structure, oil drain hole, and oil drain insert from another facade, side facade, raised structure, oil drain hole, and oil drain insert. For example, a first oil drain plug could be referred to as a second oil drain plug, and similarly, a second oil drain plug could be referred to as a first oil drain plug without departing from the scope of the exemplary embodiments. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0034] Please combine Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the three-dimensional structure of an oil pan embodiment provided by the utility model. Figure 2 This is a schematic top view of an embodiment of a high oil storage capacity oil pan for a medium-sized engine provided by the present invention; Figure 1 and Figure 2 As shown, the oil pan provided in this embodiment includes a deep oil storage area 11, a transition area 12, and a shallow oil storage area 13; the mounting surfaces 101 of the deep oil storage area 11, the transition area 12, and the shallow oil storage area 13 are in the same plane, the bottom surface 111 of the deep oil storage area 11 and the bottom surface 121 of the transition area 12 are transitionally connected via a first vertical surface 102, and the bottom surface 121 of the transition area 12 and the bottom surface 131 of the shallow oil storage area 13 are transitionally connected via a second vertical surface 103, the mounting surface 101 and the bottom surface 111 of the deep oil storage area 11 are opposite to each other, and the outer surfaces of the bottom surface 111 of the deep oil storage area 11, the outer surfaces of the bottom surface 121 of the transition area 12, and the outer surfaces of the bottom surface 131 of the shallow oil storage area 13 are provided with crisscross reinforcing ribs;

[0035] A sealing groove 104 is provided on the mounting surface 101, and a mounting hole 105 is provided on the outer side of the sealing groove 104. A glue-removing groove is provided on the end surface below the mounting hole 105 to uniformly adjust the wall thickness. The number of the mounting holes 105 is specifically 28, and the arrangement of the mounting holes 105 is specifically 10 in each of the two long sides, and they are evenly arranged, and 4 in each of the two short sides;

[0036] A first oil drain hole 116 is provided at the lower portion of the first side elevation 112 of the deep oil storage area 11, in which a first oil drain insert 2 and a first oil drain 3 are fixed. A second oil drain hole 134 is provided at the lower portion of the third side elevation 132 of the shallow oil storage area 13, in which a second oil drain insert 21 and a second oil drain plug 31 are fixed. A first protruding structure 114 is provided at the first side elevation 112 of the deep oil storage area 11, and a second protruding structure 115 is provided at the second side elevation 113 of the deep oil storage area 11, for increasing the oil storage volume.

[0037] See also Figure 1 The cross-sectional shape of the deep oil storage area 11, the transition area 12 and the shallow oil storage area 14 is an inverted "concave" shape, that is, the depth of the shallow oil storage area 13 is higher than the depth of the transition area 12, so as to further increase the oil storage volume of the oil pan.

[0038] Specifically, the transverse reinforcement ribs are arranged in parallel, and the spacing between adjacent transverse reinforcement ribs is specifically 8-18mm. The longitudinal reinforcement ribs are arranged in parallel, and the spacing between adjacent longitudinal reinforcement ribs is specifically 30-50mm. The reinforcement ribs can not only increase the rigidity of the product, but also solve the noise problem of the metal oil pan during driving and solve the impact resistance and high strength problems of the oil pan product.

[0039] Among them, the oil pan is injection molded from fiber-reinforced thermoplastic composite materials.

[0040] Continue to see Figure 1 There are two first oil drain holes 116, one located at the lower portion of the first side elevation 112 of the deep oil storage area 11 and the other located at the lower portion of the second side elevation 113 of the deep oil storage area 11, near the transition area 12. There are four first protruding structures 114 and four second protruding structures 115, and the first protruding structures 114 and the second protruding structures 115 are disposed opposite each other.

[0041] Compared to existing technologies, the engine oil pan of this embodiment is injection-molded from a fiber-reinforced thermoplastic composite material, resulting in a simpler structure, reducing both the difficulty and cost of molding. The oil drain insert and other components are integrated into the injection-molded housing, forming the oil pan assembly. This significantly reduces product weight and reduces noise pollution during driving. Compared to oil pans of the same dimensions, this allows for increased loader oil capacity and a longer engine maintenance mileage.

[0042] Furthermore, to ensure airtightness between the oil pan and the cylinder body, a rubber gasket 4 is installed in the sealing groove 104. The elasticity of rubber ensures airtightness between the oil pan and the cylinder body, and rubber has good wear resistance, so the rubber gasket 4 can be recycled after the oil pan is disassembled.

[0043] Furthermore, in order to improve the overall mounting strength of the oil pan, mounting bolts 5 are installed in the mounting holes 105 , and the oil pan is connected to the cylinder block via the mounting bolts 5 .

[0044] Specifically, in actual application, the mounting bolt 5 includes a metal sleeve and a metal bolt, and the metal sleeve and the metal bolt are fixedly connected.

[0045] More specifically, in order to ensure that the mounting bolt 5 is stably fixed in the mounting hole 105 and the connection strength is ensured, the mounting bolt 5 can be fixed in the mounting hole 105 by a limiting structure. For example, a limiting structure can be set in the mounting hole 105, or a limiting structure can be set on the metal sleeve of the mounting bolt 5 to fix the mounting bolt 5 in the mounting hole 105; or it can be fixed in the mounting hole 105 by interference fit, or fixed in the mounting hole 105 by bonding.

[0046] In order to further improve the rigidity and strength of the oil pan in this embodiment, the outer surfaces of the first protrusion structure 114 and the second protrusion structure 115 are provided with crisscross reinforcing ribs. The transverse reinforcing ribs are arranged in parallel, and the spacing between adjacent transverse reinforcing ribs is specifically 8-18 mm. The longitudinal reinforcing ribs are arranged in parallel, and the spacing between adjacent longitudinal reinforcing ribs is specifically 30-50 mm.

[0047] In order to further improve the rigidity and strength of the oil pan in this embodiment, reinforcing ribs 107 are provided at the bottom of the transition area 12 and the shallow oil storage area 13. Figure 2 In this embodiment, there are two reinforcing ribs 107 , which are arranged in parallel, and the spacing between two adjacent reinforcing ribs 107 is specifically 60-80 mm.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention are included in the scope of protection of the present invention.

Claims

1. An oil pan for an engine, characterized in that: The oil sump comprises a deep oil storage area (11), a transition area (12) and a shallow oil storage area (13); The installation surfaces (101) of the deep oil storage area (11), the transition area (12) and the shallow oil storage area (13) are in the same plane, the bottom surface (111) of the deep oil storage area (11) and the bottom surface (121) of the transition area (12) are transitionally connected via a first vertical surface (102), the bottom surface (121) of the transition area (12) and the bottom surface (131) of the shallow oil storage area (13) are transitionally connected via a second vertical surface (103), the installation surface (101) and the bottom surface (111) of the deep oil storage area (11) are opposite to each other, and the outer surface of the bottom surface (111) of the deep oil storage area (11), the outer surface of the bottom surface (121) of the transition area (12) and the outer surface of the bottom surface (131) of the shallow oil storage area (13) are provided with crisscross reinforcing ribs; A sealing groove (104) is provided on the mounting surface (101), a mounting hole (105) is provided outside the sealing groove (104), and a glue removal groove is provided on the end surface below the mounting hole (105) for uniform wall thickness. The number of the mounting holes (105) is specifically 28, and the arrangement of the mounting holes (105) is specifically 10 in each of the two long sides, and the holes are evenly arranged, and 4 in each of the two short sides; A first oil drain hole (116) is provided at the lower portion of the first side elevation (112) of the deep oil storage area (11), a first oil drain insert (2) and a first oil drain plug (3) are fixed in the first oil drain hole (116), a second oil drain hole (134) is provided at the lower portion of the third side elevation (132) of the shallow oil storage area (13), a second oil drain insert (21) and a second oil drain plug (31) are fixed in the second oil drain hole (134), and a first protruding structure (114) is provided on the first side elevation (112) of the deep oil storage area (11), and a second protruding structure (115) is provided on the second side elevation (113) of the deep oil storage area (11), for increasing the oil storage volume; Wherein, the oil pan is injection-molded from fiber-reinforced thermoplastic composite material.

2. The oil sump according to claim 1, characterized in that Specifically, there are four of the first protruding structures (114), and specifically, there are four of the second protruding structures (115).

3. The oil sump according to claim 2, characterized in that A rubber sealing gasket (4) is installed in the sealing groove (104).

4. The oil sump according to claim 3, characterized in that A mounting bolt (5) is installed in the mounting hole (105), and the oil pan is connected to the cylinder body via the mounting bolt (5).

5. The engine oil pan according to claim 4, characterized in that: The mounting bolt (5) comprises a metal sleeve and a metal bolt, and the metal sleeve and the metal bolt are fixedly connected.

6. The engine oil pan according to claim 5, characterized in that: The mounting bolt (5) is fixed in the mounting hole (105) via a limiting structure, or is fixed in the mounting hole (105) via interference fit, or is fixed in the mounting hole (105) via bonding.

7. The oil sump according to any one of claims 1 to 6, characterized in that: The outer surfaces of the first protruding structure (114) and the second protruding structure (115) are provided with crisscross reinforcing ribs.

8. The oil sump according to claim 1, characterized in that Reinforcement ribs (107) are provided at the bottom of the transition area (12) and the shallow oil storage area (13) to increase the strength of the oil pan.