CN212716807U - Oil pan and engine - Google Patents

Abstract

The utility model relates to an automobile power equipment technical field, concretely relates to oil pan and engine aims at solving the problem that can not use conventional suction cleaner, manufacturing cost increases. The utility model provides an oil pan, it includes: the oil pan body, oil pan body have open-top hold the chamber, and oil pan body's bottom is formed with the space of dodging that is used for holding the front drive axle along its length direction, and the bottom surface that holds the chamber disposes a spill oil groove at most. Through above-mentioned setting, utilize conventional strainer to stretch into and hold chamber or concave oil groove in, alright suction holds the interior machine oil of intracavity, need not to carry out special design to the strainer, is favorable to avoiding manufacturing cost's increase.

Description

Oil pan and engine

Technical Field

The utility model relates to an automobile power equipment technique especially relates to an oil pan and engine.

Background

The lower part of the engine cylinder body is provided with a crankcase for mounting a crankshaft, the crankcase is divided into an upper crankcase and a lower crankcase, the upper crankcase and the cylinder body are integrally formed in a casting mode, the lower crankcase is also called an oil pan, and the oil pan is used for sealing the crankcase of the engine and storing engine oil so as to prevent impurities from being mixed into the engine oil.

For a tractor driven by a front wheel, the tractor comprises an engine, a front frame, a rear frame and a clutch, wherein a front drive axle is arranged below the front frame, a rear drive axle is arranged below the rear frame, the engine is transversely arranged on the front frame of the tractor and is connected with the clutch, the clutch is in transmission connection with an input shaft of a gearbox fixedly arranged on the rear frame, a rear output shaft of the gearbox is in transmission connection with the rear drive axle through a rear drive shaft, and a front output shaft of the gearbox is in transmission connection with the front drive axle through a front drive shaft. Wherein the front driving shaft extends from front to back at the bottom of the engine. In order to avoid the front driving shaft, an avoiding groove which is sunken towards the inside of the oil pan is formed at the bottom of the oil pan, so that the front driving shaft can pass through the avoiding groove. Correspondingly, the inner bottom wall of the oil pan is formed with a raised ridge part, and concave oil grooves are formed on two sides of the ridge part.

However, in order to suck the oil in the concave oil grooves on both sides of the ridge portion, the oil pan needs to be specially designed for a strainer for sucking the oil in the oil pan, which increases the manufacturing cost.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides an oil pan and engine to solve the unable conventional suction cleaner of unable, the technical problem that manufacturing cost increases.

The utility model discloses an aspect of the embodiment provides an oil pan, and it includes: the oil pan body, the oil pan body has open-top's the chamber that holds, the bottom of oil pan body is formed with the space of dodging that is used for holding the front drive axle along its length direction, the bottom surface that holds the chamber disposes a spill oil groove at most.

The oil pan is characterized in that the bottom surface of the accommodating cavity is a plane, a first supporting portion and a second supporting portion are arranged at the bottom of the oil pan body at intervals in the width direction of the oil pan body, and the avoiding space is formed between the first supporting portion and the second supporting portion.

The oil pan is characterized in that a protruding portion is formed in the middle of the bottom surface of the accommodating cavity in the direction away from the top of the oil pan body, the inner side surfaces of the protruding portions limit the concave oil grooves together, and the avoiding space is formed on any one side of the protruding portions.

The oil pan as described above, wherein a concave oil groove is formed on one side of the bottom surface of the receiving cavity; the oil pan body is kept away from the bottom of the other side of the concave oil groove is provided with a third supporting part, and the third supporting part and the concave oil groove form an avoiding space therebetween.

The oil pan as described above, wherein the third support portion includes the first plate body and the second plate body that are provided at an interval in the oil pan width direction.

The oil pan is characterized in that a plurality of reinforcing ribs are further arranged between the first plate body and the second plate body, and the plurality of reinforcing ribs are arranged at intervals along the length direction of the oil pan.

The oil pan as described above, wherein each of the reinforcing ribs extends in the width direction of the oil pan.

The oil pan as described above, wherein a guide surface for guiding the oil to the concave oil groove is formed at a junction of the bottom surface of the receiving cavity and the concave oil groove.

The oil pan as described above, wherein the guide surface is a circular arc transition surface.

A second aspect of the embodiments of the present invention provides an engine, including: a cylinder block, and an oil pan according to the first aspect.

The embodiment of the utility model provides an oil pan and engine, wherein, the oil pan includes: the oil pan body, oil pan body have open-top hold the chamber, and oil pan body's bottom is formed with the space of dodging that is used for holding the front drive axle along its length direction, and the bottom surface that holds the chamber disposes a spill oil groove at most. Through above-mentioned setting, utilize conventional strainer to stretch into and hold chamber or concave oil groove in, alright suction holds the interior machine oil of intracavity, need not to carry out special design to the strainer, is favorable to avoiding manufacturing cost's increase.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic illustration of a related art engine;

fig. 2 is a cross-sectional view of an oil pan according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of another oil pan according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of another oil pan according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another oil pan according to an embodiment of the present invention.

Description of reference numerals:

100: an engine;

10: an oil pan;

20: a strainer;

30: an oil pump;

1: an oil pan body; 11: avoiding a space; 12: an oil drain hole; 13: a concave oil groove; 14: a third support portion; 141: a first plate body; 142: a second plate body; 143: and (5) reinforcing ribs.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, fig. 1 is a schematic view of an engine in the related art. The oil pan of the engine, also called a lower crankcase, is used for sealing the crankcase of the engine and storing engine oil so as to prevent impurities from being mixed into the engine oil and ensure the normal operation of each friction pair of the engine. The oil pan of the engine applied to the tractor driven by the front wheel has the advantages that the inner bottom wall of the oil pan is provided with the raised ridge part protruding upwards, correspondingly, concave oil grooves are formed in the two sides of the raised ridge part, and the avoidance groove is formed below the raised ridge part so that the front driving shaft of the tractor can pass through the front part and the rear part.

Although the oil pan 10 with the structure can avoid the front driving shaft, when the conventional strainer 20 is used for sucking the engine oil in the oil pan 10, if the oil suction port of the strainer 20 extends into the concave oil grooves on either side of the ridge-shaped part, on one hand, the engine oil in the concave oil grooves on the other side of the ridge-shaped part cannot be sucked, and on the other hand, when the tractor is in a bumpy or inclined state, the engine oil in the concave oil grooves on one side of the ridge-shaped part may flow into the concave oil grooves on the other side of the ridge-shaped part, and the strainer 20 on one side of the ridge-shaped part has an empty suction phenomenon, which results in poor lubrication.

Here, as will be understood by those skilled in the art, the conventional strainer 20 has a tubular structure, an oil suction port at the bottom end of the strainer 20 extends into the oil pan 10, and an oil outlet at the top end of the strainer 20 is communicated with an oil inlet of the oil pump 30. When the engine 100 is in operation, the oil pump 30 pumps the oil in the oil pan 10 to the lubrication line of the engine 100 through the strainer 20 to achieve good lubrication.

In order to allow the strainer 20 to effectively suck the oil in the two concave oil grooves, the strainer 20 needs to be specially designed, resulting in an increase in manufacturing costs. Illustratively, the strainer 20 includes a main oil suction pipe, and the bottom end of the main oil suction pipe is provided with two branch oil suction pipes extending downward into the oil pan 10, and the branch oil suction pipes are communicated with the main oil suction pipe. That is, the strainer 20 is provided with two oil suction branch pipes which are respectively extended into the concave oil grooves at the left and right sides of the ridge portion to suck the engine oil in the two concave oil grooves.

In view of this, the present embodiment provides an oil pan 10, in which an avoiding space is provided at the bottom of the oil pan body, the avoiding space is used for avoiding a front driving shaft, and at the same time, the bottom surface of the accommodating cavity of the oil pan body is configured with at most one concave oil groove. During the use, the oil absorption mouth of conventional strainer 20 stretches into to holding the intracavity or in this concave oil groove, alright suction oil pan 10 in the machine oil, be favorable to avoiding the machine oil in the oil pan 10 can't be fully absorb, and need not to carry out special design to strainer 20.

Fig. 2 is a cross-sectional view of an oil pan according to an embodiment of the present invention. An embodiment of the present invention provides an oil pan 10, as shown in fig. 2, including: the oil pan body 1, oil pan body 1 have open-topped hold the chamber, and the bottom of oil pan body 1 is formed with the dodging space 11 that is used for holding the front drive axle along its length direction, and the bottom surface that holds the chamber disposes a spill oil groove at most.

Here, the longitudinal direction of the oil pan 10 refers to the axial direction of the front drive shaft, i.e., the direction parallel to the axis of the front drive shaft. Accordingly, the width direction of the oil pan 10 refers to the radial direction of the front drive shaft, i.e., the direction perpendicular to the axis of the front drive shaft.

The oil pan body 1 may be not only in a regular shape such as a rectangular parallelepiped shape or a cylindrical shape, but also in other irregular shapes, and this embodiment is not limited thereto as long as it has a housing chamber for housing engine oil therein. The top of the oil pan body 1 is provided with an opening through which the strainer 20 extends into the oil pan body 1 to pump oil to the lubrication line of the engine 100.

In the description of the present invention, it is to be understood that the terms "length," "width," "top," "bottom," "inner," "outer," "axial," "radial," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

Here, it is worth mentioning that the avoidance space 11 may be provided for the front driving shaft of the front wheel-driven tractor to extend from the front to the rear, and the oil pan 10 may avoid the front driving shaft of the front wheel-driven tractor so that the front wheel-driven tractor can normally operate. Of course, the configuration may also be applicable to other similar scenarios, which is not limited by the embodiment.

Wherein, the bottom surface of holding the chamber and being configured with a concave oil groove at most can be divided into two kinds of situations: the bottom surface of the accommodating cavity is a plane, in other words, the bottom surface of the accommodating cavity is not provided with a concave oil groove; alternatively, the bottom surface of the receiving cavity is provided with only one concave oil groove.

According to the oil pan 10 provided in the present embodiment, when the bottom surface of the housing chamber is a flat surface, the conventional strainer 20 protrudes into the housing chamber, so that the engine oil in the housing chamber can be sufficiently sucked; when the bottom surface of the accommodating cavity is only provided with one concave oil groove, the conventional strainer 20 extends into the concave oil groove, so that the engine oil in the concave oil groove can be fully absorbed, and the phenomenon of air suction is favorably avoided. In summary, the conventional strainer 20 is inserted into the accommodating chamber or the concave oil groove, so that the engine oil in the accommodating chamber can be pumped, and the strainer 20 does not need to be specially designed, which is beneficial to avoiding the increase of the manufacturing cost.

It should be noted that the oil suction port of the strainer 20 should be as close as possible to the bottom surface of the oil pan 10, so as to ensure that the strainer 20 can sufficiently suck the remaining oil in the housing chamber even after the oil level is lowered or when the oil temporarily runs short of its backflow.

In one example, as shown in fig. 2, the bottom surface of the receiving cavity is a plane, and the bottom of the oil pan body 1 is provided with a first supporting portion and a second supporting portion at intervals in the width direction thereof, and an avoiding space 11 is formed between the first supporting portion and the second supporting portion. The oil pan body 1 may be integrally formed by casting or stamping. Therefore, the assembling process can be omitted, and the structure is high in strength and long in service life.

From this, on the one hand, need not to process the bottom surface that holds the chamber in order to form the spill oil groove, simple manufacture, on the other hand, when oil pan 10 placed, first supporting part and second supporting part and platform contact such as the frame of ground, tractor to prevent oil pan body 1 and platform direct contact such as ground and damage oil pan body 1's bottom surface.

For example, the first supporting portion may be a supporting rod, one end of the supporting rod is connected to the bottom surface of the oil pan body 1, and the other end of the supporting rod may be placed on the platform only or may be connected to the platform. Take the other end of bracing piece and platform to be connected as an example, the other end of bracing piece still is connected with perpendicularly and accepts the board, accepts board and platform laminating and with the platform spiro union, and then make oil pan body 1 stable, reliable be connected with the platform. For another example, the first supporting portion may be a supporting block, and the bottom surface of the oil pan body 1 is connected to the supporting block. The second support portion may also be a support bar or a support block, similar to the first support portion.

The present embodiment does not limit the distance between the first support portion and the second support portion as long as the avoidance space 11 formed between the first support portion and the second support portion can be used to accommodate the front drive shaft. The first supporting portion and the second supporting portion can be connected with the oil pan body 1 in a welding mode, can also be connected in a threaded mode, or are integrally formed in a casting mode. In addition, it should be noted that the bottom ends of the first and second support portions are flush with each other, so as to prevent the oil pan body 1 from being tilted to cause the oil in the housing chamber to be concentrated at a position where the strainer 20 cannot be sucked.

Fig. 3 is a cross-sectional view of another oil pan according to an embodiment of the present invention. In another example, as shown in fig. 3, a convex portion is formed in the middle of the bottom surface of the receiving cavity in a direction away from the top of the oil pan body 1, the inner side surfaces of the convex portions together limit the concave oil groove 13, and an avoiding space 11 is formed on any one side of the convex portion. Therefore, compared with the case where the bottom surface of the receiving cavity is a flat surface, the oil pan body 1 can contain more oil due to the concave oil groove 13, and the oil capacity is increased. In addition, when the front driving shaft is installed, the avoidance space 11 formed on any side of the protruding part can be selected to pass through according to actual working conditions, and the application range is wide. In addition, concave oil groove 13 forms in the middle part that holds the chamber, compares in one side that holds the chamber with concave oil groove 13 formation, and the machine oil that is located and holds the chamber both sides flows into concave oil groove 13 easily in, is favorable to reducing the risk that machine oil concentrates on the both sides that hold the chamber.

Of course, in some examples of the present invention, in order to improve the reliability of the oil pan 10, the bottom surface of the oil pan body 1, at which the protrusion is away from the other side of the avoidance space 11, is provided with a first supporting portion or a second supporting portion for supporting the oil pan body 1. Wherein, the first supporting portion or the second supporting portion is flush with the bottom of the protruding portion to avoid the oil pan body 1 from inclining and causing the engine oil in the accommodating cavity to concentrate on the position where the strainer 20 can not be sucked.

Fig. 4 is a cross-sectional view of another oil pan provided by the embodiment of the present invention, and fig. 5 is a schematic structural diagram of another oil pan provided by the embodiment of the present invention. In still another example, as shown in fig. 4 and 5, a concave oil groove 13 is formed on one side of the bottom surface of the accommodating cavity, a third supporting portion 14 is provided at the bottom of the other side of the oil pan body 1 away from the concave oil groove 13, and an escape space 11 is formed between the third supporting portion 14 and the concave oil groove 13. Correspondingly, a bulge is formed on one side of the bottom surface of the accommodating cavity in the direction away from the top of the oil pan body 1.

Therefore, compared with the case where the bottom surface of the receiving cavity is a flat surface, the oil pan body 1 can contain more oil due to the concave oil groove 13, and the oil capacity is increased. Moreover, compared with the previous example, in the present embodiment, the third support portions 14 and the protruding portions are respectively provided on both sides of the oil pan body 1, and the gravity of the oil pan body 1 can be uniformly distributed on the third support portions 14 and the protruding portions, thereby avoiding concentrated bearing of the gravity of the oil pan body 1 by any one of the third support portions 14 and the protruding portions, and achieving high reliability.

The third support portion 14 may be a support bar or a support block, similar to the first support portion and the second support portion. Alternatively, in the example shown in fig. 4 and 5, the third support portion 14 may include the first plate body 141 and the second plate body 142 that are provided at intervals in the width direction of the oil pan 10. From this, compare in the supporting shoe, through reasonable design, the third supporting part 14 that constitutes by first plate body 141 and second plate body 142 is similar with the structure of bellying, and third supporting part 14 and bellying set up respectively in the both sides of oil pan body 1 for the weight evenly distributed of oil pan body 1, the focus of oil pan body 1 can be located its central point, is favorable to avoiding the focus to deviate.

Here, it is understood that the first plate body 141 and the second plate body 142 may extend in the length direction of the oil pan 10 and occupy the entire length of the oil pan body 1 or occupy part of the oil pan body 1. When the first plate body 141 and the second plate body 142 occupy part of the oil pan body 1, the third support portion 14 formed by the first plate body 141 and the second plate body 142 may be plural, and the plural third support portions 14 are provided at intervals in the length direction of the oil pan 10.

Here, it should be noted that, in the description of the present invention, the terms "first" and "second" are only used for convenience in describing different components, and are not to be construed as indicating or implying a sequential relationship, relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Further, a plurality of ribs 143 are provided between the first plate body 141 and the second plate body 142, and the plurality of ribs 143 are provided at intervals in the longitudinal direction of the oil pan 10. From this, through setting up a plurality of strengthening ribs 143, improved oil pan body 1's intensity, be favorable to prolonging oil pan body 1's life.

In this example, each reinforcing rib 143 may be provided obliquely, or may extend in the width direction of the oil pan 10. In the preferred embodiment of the present embodiment, each of the reinforcing ribs 143 extends in the width direction of the oil pan 10, that is, both ends of the reinforcing rib 143 are perpendicularly connected to the first plate body 141 and the second plate body 142, respectively. With this arrangement, when the oil pan 10 is struck in a direction parallel to the width of the oil pan 10, the oil pan body 1 can withstand a larger impact force with high reliability.

On the basis of the above embodiment, as shown in fig. 4, a guide surface for guiding the engine oil to the concave oil groove 13 is formed at the junction of the bottom surface of the housing chamber and the concave oil groove 13. With this arrangement, the engine oil in the accommodating cavity is easily guided by the guide surface to flow into the concave oil groove 13, so that the part of the engine oil in the oil pan 10 is not accumulated in the accommodating cavity, and the strainer 20 extending into the concave oil groove 13 cannot sufficiently suck the engine oil into the lubricating pipeline. Especially, when the tractor is in a bumpy or inclined state, the engine oil in the concave oil groove 13 flows into one side of the accommodating cavity far away from the concave oil groove 13, and the arrangement is that the engine oil is easy to flow back into the concave oil groove 13 under the guiding action of the guide surface, so that the suction of the strainer 20 extending into the concave oil groove 13 is avoided.

Illustratively, the junction position of the bottom surface of the accommodating cavity and the concave oil groove 13 can be provided with a chamfer, the side surface of the chamfer facing the accommodating cavity is a guide surface, and the guide surface is inclined. Or, as shown in fig. 4, the guide surface may be an arc transition surface, specifically, a rounded corner is provided at a boundary position between the bottom surface of the accommodating cavity and the concave oil groove 13, and the rounded corner is the guide surface facing the side surface of the accommodating cavity. From this, compare with last possible mode, through setting up the circular arc transition face, be favorable to reducing the internal stress of oil pan body 1, and then reduce the deformation.

Referring to fig. 2 to 5, in this embodiment, the oil pan body 1 is further provided with an oil drain hole 12, and the oil pan 10 further includes an oil drain bolt, where the oil drain bolt is matched with the oil drain hole 12 to seal the oil drain hole 12. From this, after engine 100 operation a period, the partial impurity that produces in the operation process gets into and holds the intracavity and mix with machine oil, leads to having impurity in the machine oil, at this moment, through demolising the oil drain bolt for machine oil that contains impurity discharges oil pan body 1 through oil drain hole 12, and new machine oil of filling again in oil pan 10 is favorable to avoiding the machine oil that contains impurity to get into the pipeline of engine 100 and influence engine 100's performance, in order to realize the maintenance and the maintenance to engine 100.

In addition, as will be understood by those skilled in the art, in order to ensure that the engine oil in the concave oil grooves 13 on both sides of the ridge portion can be discharged, the concave oil grooves 13 on both sides of the ridge portion are provided with oil drain holes 12 and oil drain bolts engaged with the oil drain holes 12. Compared with the prior art, the oil drain hole 12 and the oil drain bolt are arranged in the oil drain device, so that all the engine oil can be drained, the two oil drain bolts do not need to be screwed during maintenance, and the oil drain operation is simplified.

When the bottom surface of the accommodating cavity is a plane, the oil drain hole 12 may be disposed on the bottom surface of the accommodating cavity, or may be disposed on the side surface of the oil pan body 1, and may be disposed as close as possible to the bottom surface of the oil pan body 1, so as to drain the engine oil mixed with impurities as much as possible. Similarly, when only one concave oil groove 13 is disposed on the bottom surface of the receiving cavity, the oil drain hole 12 may be disposed on the bottom surface of the concave oil groove 13, or may be disposed on the side surface of the concave oil groove 13, and may be disposed as close as possible to the bottom surface of the oil pan body 1.

The embodiment of the present invention further provides an engine 100, where the engine 100 includes a cylinder block and the oil pan 10, and the oil pan 10 is installed in the lower portion of the cylinder block for storing engine oil. The structure and function of the oil pan 10 have been described in detail in the above embodiments, and are not described again here.

The engine 100 provided according to the present embodiment has several advantages, but is not limited to:

a. by arranging at most one concave oil groove 13 on the bottom surface of the accommodating cavity, the conventional strainer 20 extends into the accommodating cavity or the concave oil groove 13, so that the engine oil in the oil pan 10 can be sufficiently sucked, the strainer 20 does not need to be specially designed, and the increase of the manufacturing cost is avoided.

b. When the tractor is in a bumpy or inclined state and engine oil in the concave oil groove 13 flows into one side of the accommodating cavity far away from the concave oil groove 13, the guide surface can guide the engine oil to flow into the concave oil groove 13, and air suction of the strainer 20 extending into the concave oil groove 13 is avoided.

c. Compared with the prior art, the oil pan 10 of the engine 100 is only provided with one oil drain hole 12 and oil drain bolts, so that two oil drain bolts do not need to be screwed during maintenance, and the oil drain operation is simplified.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. An oil pan, comprising: the oil pan body, the oil pan body has open-top's the chamber that holds, the bottom of oil pan body is formed with the space of dodging that is used for holding the front drive axle along its length direction, the bottom surface that holds the chamber disposes a spill oil groove at most.

2. The oil pan according to claim 1, wherein the bottom surface of the accommodating chamber is a plane, and a first support portion and a second support portion are provided at intervals in the width direction of the bottom of the oil pan body, and the avoiding space is formed between the first support portion and the second support portion.

3. The oil pan according to claim 1, wherein a protrusion is formed in the middle of the bottom surface of the accommodating cavity in a direction away from the top of the oil pan body, inner side surfaces of the protrusions jointly limit the concave oil groove, and any one side of the protrusion forms the avoiding space.

4. An oil pan according to claim 1, wherein a concave oil groove is formed on one side of the bottom surface of the accommodation chamber;

the oil pan body is kept away from the bottom of the other side of the concave oil groove is provided with a third supporting part, and the third supporting part and the concave oil groove form an avoiding space therebetween.

5. The oil pan according to claim 4, wherein the third support portion includes a first plate body and a second plate body that are provided at intervals in the width direction of the oil pan.

6. The oil pan according to claim 5, wherein a plurality of reinforcing ribs are further arranged between the first plate body and the second plate body, and the plurality of reinforcing ribs are arranged at intervals along the length direction of the oil pan.

7. The oil pan according to claim 6, wherein each of the reinforcing ribs extends in a width direction of the oil pan.

8. An oil pan according to claim 3 or 4, characterized in that a guide surface for guiding the oil to the concave oil groove is formed at a junction of the bottom surface of the receiving chamber and the concave oil groove.

9. An oil sump according to claim 8, wherein the guide surface is a radiused transition surface.

10. An engine, comprising: a cylinder block and an oil pan according to any one of claims 1 to 9.

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