Oil pan structure

Abstract

The utility model provides an oil pan structure which can restrain vibration and noise accompanying the vibration and is beneficial to light weight of the structure. The oil pan structure is fixed to the bottom of a cylinder of an engine and is formed into an open case profile having an opening portion, a bottom surface, and side surfaces, the opening portion being open toward the cylinder side of the engine, the oil pan structure comprising: a plurality of protruding portions protruding toward the inside of the open case profile in an arc shape having a predetermined width and curvature at a predetermined height; and protruding parts which protrude toward the outside of the open box contour at a curvature smaller than the arc-shaped curvature of the protruding parts or at corner parts and which connect adjacent protruding parts, the protruding parts being provided on the bottom surface and the side surfaces, and each of the protruding parts having a predetermined height and a predetermined width set on the basis of the position at which each of the protruding parts itself is provided.

Description

Technical Field

[0001] This utility model relates to an oil pan structure. Background Technology

[0002] In recent years, research and development related to lightweighting that contributes to energy efficiency has been underway in order to ensure access to affordable, reliable, sustainable and advanced energy for more people.

[0003] In engines, structures with relatively large planar shapes, such as oil pans, can generate noise due to planar vibration. Therefore, in existing technologies, structural rigidity is increased at the locations where protrusions and recesses are provided on the flat surfaces, or by forming protrusions and projections with curvature greater than that of the protrusions, thereby suppressing vibrations on the flat surfaces. However, there are limitations to suppressing planar vibrations by increasing structural rigidity, thus requiring measures to further suppress vibrations. On the other hand, how to balance the weight reduction of component structures is also an important issue.

[0004] This project aims to address the aforementioned issues by achieving lightweighting. Furthermore, it contributes to energy efficiency.

[0005] [Existing Technical Documents]

[0006] [Patent Literature]

[0007] [Patent Document 1] Japanese Patent Publication No. 4625442

[0008] [Patent Document 2] Japanese Patent Publication No. 2009-287436 Utility Model Content

[0009] This invention provides an oil pan structure that can suppress vibration and the noise that accompanies it, and is also beneficial for the lightweighting of the structure.

[0010] This utility model discloses an oil pan structure fixed to the bottom of an engine block, forming an open housing profile with an opening, a bottom surface, and side surfaces, the opening facing the engine block side. The oil pan structure includes: multiple protrusions protruding inwards from the open housing profile in an arc shape with a predetermined width and curvature at a predetermined height; and protrusions protruding outwards from the open housing profile with a curvature smaller than the arc shape of the protrusions or at a corner, connecting adjacent protrusions. The protrusions are disposed on the bottom surface and side surfaces, and the predetermined height and predetermined width of each protrusion are set based on the position of each protrusion itself.

[0011] In one embodiment of the present invention, the protrusion provided on the side includes a first side protrusion and a second side protrusion. The second side protrusion is closer to the bottom surface than the first side protrusion. The width of the first side protrusion is greater than the width of the second side protrusion, and the height of the first side protrusion is equal to or greater than the height of the second side protrusion.

[0012] In one embodiment of the present invention, the protrusion provided on the bottom surface includes a first bottom surface protrusion and a second bottom surface protrusion. The first bottom surface protrusion is closer to the side surface than the second bottom surface protrusion. The width of the first bottom surface protrusion is greater than the width of the second bottom surface protrusion, and the height of the first bottom surface protrusion is equal to or greater than the height of the second bottom surface protrusion.

[0013] In one embodiment of this utility model, the predetermined height of the protrusion is set to 9 mm or more.

[0014] In one embodiment of this utility model, a plurality of protrusions are provided, and each of the protrusions has an interior angle at the intersection where adjacent protrusions connect to each other, and the size of the interior angle of each protrusion varies according to its position.

[0015] In one embodiment of the present invention, the aforementioned protrusion extends along the arrangement direction of the engine cylinders.

[0016] Based on the above, the oil pan structure of this embodiment, by providing protrusions on the bottom and side surfaces, and configuring the predetermined height and predetermined width of each protrusion based on its own position, can further adjust the surface rigidity appropriately according to each part of the oil pan structure, thereby further reducing noise caused by membrane vibration and reducing the weight of the oil pan structure.

[0017] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the oil pan structure according to an embodiment of the present utility model;

[0019] Figure 2 yes Figure 1 An enlarged schematic diagram of the protrusions and protrusions of the oil pan structure shown;

[0020] Figure 3 yes Figure 1 A schematic diagram showing the predetermined height and predetermined width of each protrusion of the oil pan structure.

[0021] Figure 4 This is a schematic diagram of the existing oil pan structure.

[0022] Figure 5A and Figure 5B These are, respectively, the existing oil pan structure and... Figure 1 A schematic diagram of the vibration condition of the oil pan structure.

[0023] Explanation of reference numerals in the attached figures:

[0024] 10: Engine

[0025] 100, 100': Oil pan structure

[0026] 110: Protrusion

[0027] 111S: First side protrusion

[0028] 112S: Second side protrusion

[0029] 111B: First bottom protrusion

[0030] 112B: Second bottom protrusion

[0031] 120, 120a, 120b: Protrusions

[0032] OP: Opening

[0033] SU, SU': bottom surface

[0034] SL, SL': Side view

[0035] R: Curvature

[0036] W, WS1, WS2, WB1, WB2: Width

[0037] H, HS1, HS2, HB1, HB2: Height

[0038] θa, θb: interior angle. Detailed Implementation

[0039] Figure 1 This is a schematic diagram of the oil pan structure according to an embodiment of the present utility model; Figure 2 yes Figure 1 An enlarged schematic diagram of the protrusions and protrusions of the oil pan structure shown; Figure 3 yes Figure 1 This diagram illustrates the predetermined height and width of each protrusion of the oil pan structure. The following will use... Figures 1 to 3 Explain the specific structure of the oil pan structure 100.

[0040] Please refer to Figures 1 to 3In this embodiment, the engine 10 equipped with the oil pan structure 100 according to the present invention is an internal combustion engine having a plurality of cylinders arranged in a straight line. The engine 10 is mounted on a vehicle, and the cylinders are arranged along the width direction of the vehicle. Figure 1 Arrangement (the direction in which the light enters the paper). For example... Figure 1 As shown, in this embodiment, the oil pan structure 100 is fixedly installed at the bottom of the cylinder block of the engine 10, forming an open box profile with an opening OP, a bottom surface SU and a side surface SL, wherein the opening OP is open towards the cylinder block side of the engine 10.

[0041] Furthermore, such as Figure 1 and Figure 2 As shown, in this embodiment, the oil pan structure 100 includes a plurality of protrusions 110 and protrusions 120. The protrusions 110 protrude inwards from the open housing contour in an arc shape with a predetermined width W and curvature R at a predetermined height H. The protrusions 120 protrude outwards from the open housing contour with a curvature smaller than the arc shape R of the protrusions 110, or with corners, and connect to adjacent protrusions 110. The protrusions 110 are disposed on the bottom surface SU and the side surface SL, and the predetermined height H and predetermined width W of each protrusion 110 are set based on its own position. Each protrusion 120 has an interior angle at the intersection where adjacent protrusions 110 connect, and the size of the interior angle of each protrusion 120 varies according to its position. For example, as... Figure 2 As shown, in this embodiment, the interior angle θa of the protrusion 120a and the interior angle θb of the protrusion 120b are different from each other.

[0042] Furthermore, in this embodiment, the protrusion 110 extends along the cylinder arrangement direction of the engine 10, that is, the protrusion 110 extends along the length direction of the oil pan structure 100. Thus, the protrusion 110, having a large curvature R, extends along the length direction of the oil pan structure 100 and can be used as a rib at the bottom of the oil pan structure 100, thereby further increasing the rigidity of the bottom of the oil pan structure 100. Therefore, when the engine 10 is running, diaphragm vibration at the bottom of the oil pan structure 100 can be suppressed, and the sound pressure level of the radiated sound caused by this vibration can be reduced. Thus, in the length direction where strength of the oil pan structure 100 is required, the rigidity is improved by the arrangement of the protrusion 110, while also reducing noise caused by diaphragm vibration that may occur when the engine 10 is running.

[0043] On the other hand, since the width and height of the protrusion 110 affect the surface rigidity of the part where it is located, for example, when the width and height of the protrusion 110 increase, the surface rigidity of the part where it is located will decrease accordingly. Therefore, by providing protrusions 110 on the bottom surface SU and the side surface SL, and by setting the predetermined height H and predetermined width W of each protrusion 110 based on its own position, the surface rigidity can be further appropriately adjusted according to each part of the oil pan structure 100, thereby further reducing the noise caused by membrane vibration, and by adjusting the size of the width and height of the protrusion 110, the weight of the oil pan structure 100 can also be further reduced.

[0044] The following will be paired Figure 3 To provide further explanation.

[0045] Specifically, such as Figure 3 As shown, in this embodiment, the protrusion 110 provided on the side SL includes a first side protrusion 111S and a second side protrusion 112S. The second side protrusion 112S is closer to the bottom surface SU than the first side protrusion 111S. The width WS1 of the first side protrusion 111S is greater than the width WS2 of the second side protrusion 112S, and the height HS1 of the first side protrusion 111S is equal to or greater than the height HS2 of the second side protrusion 112S. Thus, by setting the width WS1 of the first side protrusion 111S located on the side SL and near the opening OP to be greater than the width WS2 of the second side protrusion 112S located on the side SL and near the bottom surface SU, and setting the height HS1 of the first side protrusion 111S located on the side SL and near the opening OP to be equal to or greater than the height HS2 of the second side protrusion 112S located on the side SL and near the bottom surface SU, the surface rigidity of the portion of the first side protrusion 111S near the opening OP can be less than the surface rigidity of the second side protrusion 112S. The first side protrusion 111S near the opening OP can absorb the deformation caused by vibration when the engine 10 is running, thereby allowing the bottom surface SU of the oil pan structure 100 to move to both sides in a direction parallel to the bottom surface SU, thereby suppressing the deformation of the bottom surface SU of the oil pan structure 100 in the vertical direction, i.e., the case of membrane vibration, thereby further reducing the noise caused by membrane vibration.

[0046] On the other hand, in this embodiment, the protrusion 110 provided on the bottom surface SU includes a first bottom surface protrusion 111B and a second bottom surface protrusion 112B. The first bottom surface protrusion 111B is closer to the side surface SL than the second bottom surface protrusion 112B. The width WB2 of the first bottom surface protrusion 111B is greater than the width WB1 of the second bottom surface protrusion 112B, and the height HB1 of the first bottom surface protrusion 111B is equal to or greater than the height HB2 of the second bottom surface protrusion 112B. Thus, by configuring the width WB2 of the first bottom surface protrusion 111B located on the bottom surface SU and near the side surface SL to be greater than the width WB1 of the second bottom surface protrusion 112B located on the bottom surface SU and away from the side surface SL, and the height HB1 of the first bottom surface protrusion 111B to be equal to or greater than the height HB2 of the second bottom surface protrusion 112B, the surface rigidity of the portion of the first bottom surface protrusion 111B near the side surface SL can be reduced. This allows the outer side of the bottom surface SU of the oil pan structure 100 to more easily follow the displacement of the side surface SL, thereby suppressing the deformation of the bottom surface SU of the oil pan structure 100 in the vertical direction, i.e., membrane vibration, and further reducing noise caused by membrane vibration. On the other hand, by configuring the second bottom surface protrusion 112B to have a smaller height and width, the strength of the oil pan structure 100 can be maintained near the center of the oil pan structure 100 without reducing its rigidity.

[0047] Furthermore, in this embodiment, the predetermined height H of the protrusion 110 is set to 9 millimeters (mm) or more. Thus, by setting the protrusion height to 9 mm or more, noise caused by membrane vibration that may occur when the engine 10 is running can be further reduced.

[0048] On the other hand, such as Figure 2 As shown, in this embodiment, by appropriately setting the inner angle of the protrusion 120 at the connection of the protrusion 110, the protrusion 110 can be arranged continuously, while avoiding interference with surrounding parts. This allows for appropriate adjustment of the surface rigidity of each part of the oil pan structure 100, which can further reduce the noise caused by membrane vibration that may occur when the engine 10 is running.

[0049] Figure 4 This is a schematic diagram of the existing oil pan structure. Figure 5A and Figure 5B These are, respectively, the oil pan structure 100' and the oil pan structure 100' of the prior art when the engine 10 is running. Figure 1 A schematic diagram showing the vibration condition of the oil pan structure 100. Please refer to... Figures 4 to 5B , Figure 4 The existing oil pan structure 100' lacks the configuration of the protrusion 110 and the raised portion 120, therefore, as Figure 5AAs shown, when the engine 10 is running, the bottom surface SU' and side surface SL' of the oil pan structure 100' are deformed relative to each other due to the vibration of the engine 10 during operation. The oil pan structure 100' transmits the vibration to the bottom surface SU' through the side surface SL', causing deformation of the bottom surface SU' in the vertical direction, i.e., membrane vibration, which in turn causes noise. In contrast, as... Figure 5B As shown, Figure 5B The oil pan structure 100, through the provision of the protrusion 110, allows the first side protrusion 111S, located on the side SL and near the opening OP, to absorb the deformation caused by vibration during engine 10 operation. Furthermore, through the provision of the first bottom protrusion 111B near the outer side of the open housing outline, the bottom surface SU of the oil pan structure 100 can more easily follow the displacement of the side SL, thereby allowing the bottom surface SU of the oil pan structure 100 to move in a direction parallel to the bottom surface SU, thus suppressing the deformation of the bottom surface SU of the oil pan structure 100 in the vertical direction. Figure 5A and Figure 5B As shown, the vibration amplitude of the bottom surface SU of the oil pan structure 100 in this embodiment in the vertical direction is significantly smaller than that of the bottom surface SU. Figure 5A The vibration amplitude of the bottom surface SU' of the prior art oil pan structure 100' in the vertical direction is reduced. Therefore, it is clear that the oil pan structure 100 of this embodiment can reduce noise caused by membrane vibration.

[0050] In summary, the oil pan structure of this embodiment, by providing protrusions on the bottom and side surfaces, and configuring the predetermined height and width of each protrusion based on its own position, can further adjust the surface rigidity appropriately according to each part of the oil pan structure. This can further reduce noise caused by membrane vibration and reduce the weight of the oil pan structure.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An oil pan structure, characterized in that, The oil pan structure is fixed to the bottom of the engine block, forming an open box profile with an opening, a bottom surface, and sides. The opening faces the engine block side. The oil pan structure includes: Multiple protrusions, in the form of arcs with a predetermined width and curvature at a predetermined height, protrude inwards towards the inner side of the open box profile; and The protrusions, with a curvature smaller than that of the convex portion or with corners protruding outwards from the outer contour of the open box, connect to adjacent convex portions. The protrusions are disposed on the bottom surface and the side surface, and the predetermined height and predetermined width of each protrusion are set based on the position of each protrusion itself.

2. The oil pan structure according to claim 1, characterized in that, The protrusion disposed on the side includes a first side protrusion and a second side protrusion. The second side protrusion is closer to the bottom surface than the first side protrusion. The width of the first side protrusion is greater than the width of the second side protrusion, and the height of the first side protrusion is equal to or greater than the height of the second side protrusion.

3. The oil pan structure according to claim 1, characterized in that, The protrusions provided on the bottom surface include a first bottom surface protrusion and a second bottom surface protrusion. The first bottom surface protrusion is closer to the side surface than the second bottom surface protrusion. The width of the first bottom surface protrusion is greater than the width of the second bottom surface protrusion, and the height of the first bottom surface protrusion is equal to or greater than the height of the second bottom surface protrusion.

4. The oil pan structure according to claim 1, characterized in that, The predetermined height of the protrusion is set to be 9 mm or more.

5. The oil pan structure according to claim 1, characterized in that, The protrusions are provided in multiple ways, and each of the protrusions has an interior angle at the intersection where adjacent protrusions connect to each other. The size of the interior angle of each protrusion varies according to its position.

6. The oil pan structure according to claim 1, characterized in that, The protrusion extends along the cylinder arrangement direction of the engine.

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