JPH0714106U - Baffle plate structure of internal combustion engine - Google Patents

Abstract

(57) [Abstract] [Purpose] In the baffle plate structure of an internal combustion engine,
It reduces the aeration rate of the lubricating oil returned from the baffle plate to the oil pan. A guide rib 30 protruding upward is formed on the baffle plate 13 along an opening edge portion 15 of the strainer hole 14, and the guide rib 30 is formed on the baffle plate 13.
The oil drop hole 17 is opened to allow the lubricating oil collected through the oil to flow into the oil pan.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improved baffle plate structure for an internal combustion engine.

[0002]

[Prior art]

 As a conventional baffle plate structure for an internal combustion engine, there is, for example, that shown in FIG. 5 (see Japanese Utility Model Laid-Open No. 63-100617).

To explain this, the oil pan 1 is attached to the lower portion of an engine block (not shown). The lubricating oil stored in the oil pan 1 is sucked up via a strainer 2 by an oil pump (not shown), and the lubricating oil discharged from the oil pump returns to the oil pan 1 after lubricating each part of the mechanism. ing.

A baffle plate 3 is attached above the lubricating oil stored in the oil pan 1 so as to suppress the shaking of the lubricating oil.

A strainer hole 4 through which the strainer 2 is inserted is opened in the baffle plate 3 so that the lubricating oil flowing down on the baffle plate 3 after lubricating the engine flows down through the strainer hole 4 into the oil pan 1. It has become.

[0006]

[Problems to be solved by the device]

 However, in such a conventional baffle plate structure for an internal combustion engine, immediately after the oil mist scattered in the crank chamber by being stirred by a crank shaft (not shown) or the like is collected on the baffle plate 3, the strainer Since it flows down through the hole 4 into the oil pan 1, sufficient time for separating the air mixed in the lubricating oil on the baffle plate 3 cannot be obtained, and the lubricating oil sucked up by the oil pump through the strainer 2 The problem is that the rate of air inclusion in the air will increase.

The present invention focuses on the above-mentioned problems and aims to reduce the aeration rate of the lubricating oil returned from the baffle plate to the oil pan.

[0008]

[Means for Solving the Problems]

 The present invention has an oil pan that stores the lubricating oil that is sucked up by the oil pump through the strainer, a baffle plate that is arranged above the lubricating oil that is stored in the oil pan, and an opening in the baffle plate that opens the strainer. In an internal combustion engine having a strainer hole to be inserted, a guide rib protruding upward is formed on the baffle plate along the opening edge of the strainer hole, and the lubricating oil collected in the baffle plate via the guide rib is added to the oil. Open the oil drop hole for the pan to flow down.

[0009]

[Action]

 Since the guide ribs that protrude upward on the baffle plate are formed along the opening edge of the strainer hole, the oil mist that is agitated by the crankshaft and scattered in the crank chamber is collected on the baffle plate, and then the baffle plate. It flows on the plate and flows through the oil drop hole into the oil pan. As a result, the lubricating oil collected on the baffle plate will not immediately flow down through the strainer holes into the oil pan, and the air content mixed in the lubricating oil in the process of flowing over the baffle plate via the guide ribs will be eliminated. Sufficient time is available for separation, and the aeration rate for the lubricating oil returned from the baffle plate to the oil pan can be reduced.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 3, an aluminum cast upper oil pan 10 is connected to a cylinder block skirt of a multi-cylinder engine, and a sheet metal lower oil pan 11 is connected to the lower part of the upper oil pan 10 through a plurality of bolts. To be done.

Lubricating oil stored in the lower oil pan 10 is sucked up through a strainer by an oil pump (not shown), and the lubricating oil discharged from the oil pump lubricates each part of the engine, and then again the upper oil pan 10 and the lower oil Return to bread 11.

The lower oil pan 11 has a predetermined volume necessary to store the lubricating oil, and the upper oil pan 11 allows the lubricating oil to flow down to the lower oil pan 11.

The upper oil pan 10 is gently inclined toward the lower oil pan 11, and a plurality of arc-shaped curved ribs 21 are arranged on the side where the rotating portion approaches when viewed in the rotational movement direction of the crankshaft. And a linear rib 22 that extends to the opening of the lower oil pan 11 projects on the opposite side.

The lubricating oil flowing down on the upper oil pan 10 is agitated by a crankshaft, a connecting rod or the like. The agitated lubricating oil flow is guided by the ribs 21 and 22 to the lower oil pan 11. The lubricating oil is directed toward the lower oil pan 11.

As shown in FIG. 1, a baffle plate 13 is attached above the lubricating oil stored in the lower oil pan 11, and the strainer is exposed on the oil surface by suppressing the shaking and vibration of the lubricating oil. To prevent

As shown in FIG. 2, the baffle plate 13 has a circular strainer hole 14 through which the strainer is inserted.

As shown in FIG. 3, the sheet metal baffle plate 13 has an opening edge portion 15 of the strainer hole 14 and an outer peripheral edge portion 16 along the opening portion of the lower oil pan 11, which are bent downward. ing.

The outer peripheral edge portion 16 of the baffle plate 13 is formed with an inclined portion 23 that defines an opening between the lower oil pan 11 and a corner portion thereof, and is collected by the ribs 22 of the upper oil pan 10. Lubricating oil is made to flow into the lower oil pan 11 from this opening.

The baffle plate 13 is fastened to the upper oil pan 10 via three bolts 35 (not shown) and is fastened to the cylinder block side together with the upper oil pan 10 via five bolts. Bolt holes 19 are formed in the baffle plate 13 at predetermined positions for inserting these bolts.

A guide rib 30 protruding upward is formed on the baffle plate 13 along the opening edge portion 15 of the strainer hole 14. The guide rib 30 having an arcuate cross section and protruding is integrally formed by press working.

The guide rib 30 includes an annular portion 31 extending along the opening edge portion 15 of the strainer hole 14, and a plurality of radiating portions extending radially from the annular portion 31 toward the outer peripheral edge portion 16 while avoiding the bolt holes 19. 32.

A plurality of oil drop holes 17 are formed in the baffle plate 13 to allow the lubricating oil collected through the guide ribs 30 to flow down to the lower oil pan 11. Each oil drain hole 17 is arranged with a predetermined distance from the guide rib 30.

With the above-mentioned configuration, the operation will be described.

Since the guide rib 30 protruding upward from the baffle plate 13 is formed along the opening edge portion 16 of the strainer hole 14, the oil mist scattered to the crank chamber by being agitated by the crankshaft etc. After being collected above, the lubricating oil collected through the guide ribs 30 is made to flow into the lower oil pan 11 through the oil drop holes 17.

As a result, the lubricating oil collected on the baffle plate 13 does not immediately flow down through the strainer hole 14 and into the lower oil pan 11, but flows on the baffle plate 13 toward each oil drop hole 17. Sufficient time is obtained for the air content mixed in the lubricating oil to be separated in the process, and the air mixing ratio of the lubricating oil flowing down from the baffle plate 13 to the lower oil pan 11 can be reduced.

As a result, the aeration rate of the lubricating oil sent from the oil pump to each part of the engine can be reduced, the lubricating oil can be transported smoothly, and the operability of the actuator or the like that operates through the lubricating oil pressure can be improved. Reserved.

Further, since the baffle plate 13 is increased in rigidity through the guide ribs 30 which are raised from now on, the baffle plate 13 causes the membrane vibration due to the vibration force transmitted from the cylinder block of the engine through the upper oil pan 10. It is prevented from happening.

[0029]

[Effect of device]

 INDUSTRIAL APPLICABILITY As described above, the present invention includes an oil pan for storing the lubricating oil sucked up by the oil pump through the strainer, a baffle plate arranged above the lubricating oil stored in the oil pan, and a baffle plate. In an internal combustion engine having a strainer hole that is opened to allow a strainer to be inserted, a guide rib that protrudes upward is formed on the baffle plate along the opening edge of the strainer hole, and is collected in the baffle plate through the guide rib. Since the oil drop hole that allows the lubricating oil to flow down to the oil pan is opened, the oil mist that is scattered into the crank chamber by being stirred by the crankshaft etc. is collected on the baffle plate and then passed through the guide rib. It is sufficient to separate the air mixed in the lubricating oil in the process of flowing on the baffle plate. Time is obtained, the air mixing ratio to the lubricating oil returned from the baffle plate to the oil pan is reduced, the lubricating oil supplied from the oil pump to each part of the engine is smoothly transported, and it operates via the lubricating oil pressure. The operability of the actuator that operates is maintained.

[Brief description of drawings]

FIG. 1 is a plan view of an upper oil pan and a baffle plate showing an embodiment of the present invention.

FIG. 2 is a plan view of the baffle plate.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is an exploded perspective view of an oil pan and a baffle plate.

FIG. 5 is a plan view of an oil pan and a baffle plate showing a conventional example.

[Explanation of symbols]

 10 Upper Oil Pan 11 Lower Oil Pan 13 Baffle Plate 14 Strainer Hole 15 Strainer Hole Opening Edge 17 Oil Drop Hole 30 Guide Rib

Claims (1)

[Scope of utility model registration request] 1. An oil pan for storing a lubricating oil sucked up by an oil pump through a strainer, a baffle plate arranged above the lubricating oil stored in the oil pan, and an opening in the baffle plate for inserting the strainer therethrough. In an internal combustion engine having a strainer hole to be formed, a guide rib protruding upward to the baffle plate is formed along an opening edge portion of the strainer hole, and a lubricating oil collected in the baffle plate via the guide rib is supplied to the oil pan. A baffle plate structure for an internal combustion engine, characterized in that an oil drop hole is made to flow down.