JPH0547316U - Structure of oil pan in internal combustion engine - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent bubbles from being generated on the oil surface of the lubricating oil in the oil pan due to the lubricating oil returning to the oil pan. [Structure] A baffle plate 5 provided inside the oil pan 4 so as to divide the interior into upper and lower parts is provided with a groove 8
The oil strainer insertion hole 9 formed in the baffle plate 5 is provided around the oil strainer insertion hole 9, and one end 8 of the recessed groove 8 is provided.
A is opened so as to be close to the outer peripheral surface of the oil suction pipe line 6 from the oil strainer 7 to the lubricating oil pump 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of an oil pan attached to a lower surface of a cylinder block of an internal combustion engine.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, an oil pan in an internal combustion engine has a baffle plate that divides the inside into upper and lower parts, as described in, for example, Japanese Utility Model Publication No. S58-122717 and Japanese Utility Model Publication No. 63-115513. By providing an oil strainer to the lubricating oil pump below the baffle plate, the lubricating oil is always secured in the oil strainer. There is.

[0003]

[Problems to be solved by the device]

 However, when a baffle plate that divides the interior into upper and lower parts is provided inside the oil pan, the lubricating oil after lubricating various operating parts of the internal combustion engine drips on the upper surface of the baffle plate, and The lubricating oil dripping on the upper surface of the baffle plate is intermittently dripping from the inner peripheral edge of the oil strainer insertion hole drilled in the baffle plate toward the lubricating oil in the lower part of the oil strainer insertion hole. There is a problem of sucking these bubbles into the oil strainer because they will fall and bubbles will be generated on the oil surface of the lubricating oil.

The present invention has a technical problem to solve this problem.

[0005]

[Means for Solving the Problems]

 In order to achieve this technical problem, the present invention provides a baffle plate that divides the inside of the oil pan into upper and lower parts, and an oil strainer for the lubricating oil pump is provided in a part below the baffle plate. In the arranged oil pan, a recessed groove is provided in the baffle plate so as to surround an oil strainer insertion hole formed in the baffle plate, and one end of the recessed groove is connected to the oil storage groove. The structure is such that the oil suction pipe from the nozzle to the lubricating oil pump is opened so as to be close to the outer peripheral surface of the pipe.

[0006]

[Work]

 According to this structure, the lubricating oil dripping from the various operating parts of the internal combustion engine onto the upper surface of the baffle plate is collected so as to enter the concave groove provided on the upper surface of the baffle plate, and the concave groove is formed. From the opening at one end of the oil suction pipe, it flows toward the outer peripheral surface of the oil suction pipeline, and along the outer peripheral surface of this oil suction pipeline, it flows down to the lubricating oil in the lower part. The generation of bubbles can be greatly reduced.

[0007]

[Effect of the device]

 Therefore, according to the present invention, it is possible to surely prevent bubbles from being sucked into the lubricating oil pump, and moreover, the strength of the baffle plate can be improved by providing the concave groove therein.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 indicates a cylinder block which supports a crank shaft 2, and a lubricating oil pump 3 which is rotationally driven by the crank shaft 2 is attached to the cylinder block 1.

Reference numeral 4 denotes an oil pan made of a metal plate connected to the lower surface of the cylinder block 1. Inside the oil pan 4, a baffle plate 5 that divides the interior into upper and lower parts is fixed. An oil strainer 7 attached to the lower end of the oil suction pipe line 6 to the lubricating oil pump 3 is arranged below the baffle plate 5.

A recessed groove 8 is provided in the baffle plate 5 so as to circulate around an oil strainer insertion hole 9 formed in the baffle plate 5, and one end 8a of the recessed groove 8 is provided with the lubricating oil. The oil pump 3 is configured to open so as to be in close contact with the outer peripheral surface of the oil suction conduit 6. The baffle plate 5 is mounted by integrally providing the ear pieces 5a at a plurality of positions around the baffle plate 5 and spot-welding each of the edge portions 5a to the oil pan 4, and the baffle plate 5 is attached. The plate 5 is provided with a branch recessed groove 8a extending from the recessed groove 8 toward each ear piece 5a.

In this structure, the lubricating oil dripping on the upper surface of the baffle plate 5 from various operating parts of the internal combustion engine is collected so as to enter the recessed groove 8 provided on the upper surface of the baffle plate 5, and From the opening at the one end 8a of the recessed groove 8, it flows toward the outer peripheral surface of the oil suction conduit 6 and flows down to the lubricating oil in the lower part while traveling along the outer peripheral surface of the oil suction conduit 6. It is possible to greatly reduce the occurrence of bubbles on the oil surface of the lubricating oil.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

[Explanation of symbols]

 1 Cylinder Block 2 Crank Shaft 3 Lubricating Oil Pump 4 Oil Pan 5 Baffle Plate 6 Oil Suction Pipeline 7 Oil Strainer 8 Recessed Groove 9 Oil Strainer Insertion Hole

Claims (1)

[Scope of utility model registration request] 1. An oil pan in which a baffle plate that divides the interior of the oil pan into upper and lower parts is provided, and an oil strainer for a lubricating oil pump is provided in a portion below the baffle plate. , A recessed groove is provided in the baffle plate so as to surround an oil strainer insertion hole formed in the baffle plate, and one end of the recessed groove is provided with an oil suction line from the oil strainer to a lubricating oil pump. The structure of the oil pan in the internal combustion engine is characterized in that it is opened so as to be close to the outer peripheral surface of the.