JP2004293373A - Lubricating oil supply device for engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lubricating oil supply device for engine for enhancing lubrcity in starting without complicating the structure. <P>SOLUTION: This lubricating oil supply device for engine supplies lubricating oil stored in an oil pan to respective parts by sucking up the lubricating oil by an oil pump via an oil strainer, and is constituted so that a suction pipe 20 rotates by gravity accompanying inclination of an engine by rotatably connecting the suction pipe 20 for sucking in the lubricating oil stored in the oil pan to the body side of the engine. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an improvement in an engine lubricating oil supply device that sucks oil stored in an oil pan by driving an oil pump and circulates the oil to various parts of the engine.
[0002]
[Prior art]
Conventionally, this type of engine lubricating oil supply device includes an oil strainer facing an oil pan. The lubricating oil stored in the oil pan is sucked up by an oil pump via an oil strainer and supplied to various parts of the engine.
[0003]
For vehicles running on uneven terrain, make the oil pan bottom deep so that the intake port of the oil strainer does not come out of the lubricating oil as the engine mounted on the vehicle tilts. ing. However, when the bottom of the oil pan is deepened, the passage length of the oil strainer becomes longer, and the supply of lubricating oil tends to be delayed when the engine is started.
[0004]
The accumulator-type lubricating oil supply device disclosed in Patent Literature 1 includes an accumulator that stores pressurized lubricating oil discharged from an oil pump. Before the engine is started, the solenoid valve is opened so that the pressurized lubricating oil in the accumulator is supplied to the lubricating portion of the engine. Thereby, lubricity at the time of starting the engine is ensured.
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2000-120421
[Problems to be solved by the invention]
However, in such a conventional lubricating oil supply device for an engine, it is necessary to interpose a pressure accumulator or an electromagnetic valve in a passage for supplying the lubricating oil, resulting in a problem that the structure becomes complicated. .
[0007]
The present invention has been made in view of the above problems, and has as its object to provide a lubricating oil supply device for an engine that can improve lubricity at the time of starting without complicating the structure.
[0008]
[Means for Solving the Problems]
The first invention is applied to an engine in which lubricating oil stored in an oil pan is sucked up by an oil pump through an oil strainer and supplied to each part.
[0009]
A suction pipe for sucking the lubricating oil stored in the oil pan is rotatably connected to the main body of the engine, and the suction pipe is rotated by gravity as the engine is tilted.
[0010]
According to a second aspect, in the first aspect, a weight is attached to the suction pipe.
[0011]
According to a third aspect of the present invention, in the first or second aspect, a roller rotatably contacting the oil pan is provided, and the suction pipe is rotatably supported via the roller.
[0012]
In a fourth aspect based on the first or second aspect, a sliding member is provided for slidingly contacting the oil pan, and the suction pipe is rotatably supported via the sliding member.
[0013]
According to a fifth aspect of the present invention, in the first or second aspect, an annular guide rail that is slidably contacted with the tip of the oil pan is attached to the oil pan, and the suction pipe is rotatably supported via the guide rail. And
[0014]
Function and Effect of the Invention
In the first aspect, for example, when the vehicle runs on uneven terrain, the suction pipe is rotated by gravity as the engine mounted on the vehicle is greatly inclined. As a result, the suction port of the suction pipe moves to the side where the lubricating oil is biased by gravity in the oil pan, the exposure of the suction port on the oil surface is suppressed, and the supply of the lubricating oil to each part of the engine is maintained. You.
[0015]
As a result, the bottom of the oil pan can be made shallower, and the passage length of the oil strainer can be shortened, so that a delay in lubricating oil supply at the time of starting the engine can be improved.
[0016]
In the second invention, by attaching the weight to the suction pipe, the suction pipe is urged to rotate by gravity.
[0017]
In the third aspect of the invention, the support rigidity of the suction pipe can be increased via the roller that comes into contact with the oil pan.
[0018]
In the fourth aspect, the support rigidity of the suction pipe can be increased via the sliding member that slides on the oil pan.
[0019]
In the fifth aspect, the support rigidity of the suction pipe can be increased through the annular guide rail that slides on the tip of the oil pan.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0021]
First, FIG. 1 shows an example of an engine to which the present invention can be applied. The lubricating oil suction device of the engine 1 includes an oil strainer 3 facing the oil pan 2. The lubricating oil stored in the oil pan 2 removes large debris by an oil screen 8 as shown by an arrow in the figure, is sucked up by an oil pump 4 through a suction passage 9, and is supplied from an oil filter 5 and an oil cooler 6 to a supply passage 7. And is supplied to each part of the engine 1.
[0022]
In the present invention, a suction pipe for sucking the lubricating oil stored in the oil pan 2 is rotatably connected to the engine body side, and the suction pipe is rotated by gravity as the engine body tilts.
[0023]
Hereinafter, specific examples of the embodiment will be described with reference to FIGS.
[0024]
The oil strainer 3 shown in FIG. 2 includes a main pipe 10 fixed to the engine body side, and a suction pipe 20 rotatably connected to the main pipe 10 via a bearing 30.
[0025]
As the bearing 30, folded portions 11 and 21 having a U-shaped cross section are formed at the lower end portion of the main pipe 10 and the upper end portion of the suction pipe 20, respectively, and the folded portions 11 and 21 are slidably fitted to each other. ing. The diameter of the main pipe 10 is enlarged in the shape of a trumpet so that the passage area of the oil strainer 3 is not reduced at a portion where the bearing 30 is provided.
[0026]
A seal ring 15 is interposed between the folded portions 11 and 21 to enhance the sealing performance. The present invention is not limited to this, and the seal ring may be omitted.
[0027]
Note that the bearing 30 is not limited to the above-described structure, and for example, a rolling bearing or the like may be provided.
[0028]
The suction pipe 20 extends in a direction inclined with respect to the central axis O of the bearing 30, and rotates by gravity. As shown by a two-dot chain line in FIG. 2, the weight 23 is directly attached to the lower end of the suction pipe 20, or the weight 24 is connected via the chain 25 to increase the gravity for rotating the suction pipe 20. It is good also as composition.
[0029]
A wire mesh-shaped oil screen (not shown) is attached to a suction port 22 opened at the lower end of the suction pipe 20 to remove large dust from lubricating oil sucked into the suction pipe 20.
[0030]
The suction port 22 opens obliquely with respect to the suction pipe 20, and the opening area thereof is sufficiently ensured. The suction port 22 faces the bottom of the oil pan 2 substantially in parallel.
[0031]
As shown in FIG. 3, the suction pipe 20 is formed in a straight pipe, the cross-sectional area S ₁ of the upper portion, and the cross-sectional area S ₂ of the lower end portion is substantially equal.
[0032]
Not limited to this, as shown in FIG. 4, the suction tube 20 is formed in a trumpet shape, may be the cross-sectional area S ₂ of the lower end with respect to the cross-sectional area S ₁ of the upper portion is increased. Thereby, the pressure loss of the suction pipe 20 can be reduced.
[0033]
With the above-described configuration, when the vehicle travels on uneven terrain, the suction pipe 20 is rotated by gravity as the engine 1 mounted on the vehicle is greatly inclined. As a result, the suction port 22 of the suction pipe 20 moves to the side where the lubricating oil is biased by gravity in the oil pan 2, so that the suction port 22 is prevented from being exposed on the oil surface, and the lubricating oil for each part of the engine 1 is Supply is maintained. Thereby, the limit value of the inclination angle allowed for the engine 1 can be widened.
[0034]
As a result, the bottom of the oil pan can be made shallower, and the length of the passage of the oil strainer 3 can be shortened, so that a delay in lubricating oil supply when the engine is started can be improved.
[0035]
Further, as shown by a two-dot chain line in FIG. 2, a roller 26 that comes into contact with the bottom of the oil pan 2 may be attached to the suction pipe 20. The roller 26 is formed of a rubber material or the like. By supporting the suction pipe 20 at the bottom of the oil pan 2 via the roller 26, the support rigidity of the oil strainer 3 can be increased.
[0036]
Further, as shown in FIG. 5, a pair of sliding members 27 that slide on the bottom of the oil pan 2 may be provided to increase the support rigidity of the oil strainer 3.
[0037]
Further, as shown in FIG. 6, the sliding contact member 27 may have a hollow structure having a triangular cross section.
[0038]
As shown in FIG. 5, a cylindrical support 30 is fixed to the bottom of the oil pan 2, and an annular guide rail 31 that supports the distal end portion 28 of the suction pipe 20 slidably on the support 30. It is formed. The support base 30 has an opening through which the lubricating oil passes.
[0039]
By supporting the suction pipe 20 on the oil pan 2 via the guide rail 31, the support rigidity of the oil strainer 3 can be increased.
[0040]
It is apparent that the present invention is not limited to the above-described embodiment, and that various changes can be made within the scope of the technical idea.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of an engine to which the present invention is applied.
FIG. 2 is a sectional view of an oil strainer according to the embodiment of the present invention.
FIG. 3 is a plan view showing the shape of the passage of the suction pipe.
FIG. 4 is a plan view showing a passage shape of a suction pipe as another embodiment.
FIG. 5 is a cross-sectional view of a suction pipe and the like showing another embodiment.
FIG. 6 is a sectional view of a suction pipe according to another embodiment.
FIG. 7 is a cross-sectional view of a suction pipe, a support, and the like showing another embodiment.
[Explanation of symbols]
2 Oil pan 3 Oil strainer 3b Seat 10 Main pipe 20 Suction pipe 23, 24 Weight 26 Roller 27 Sliding member 31 Guide rail

Claims (5)

In an engine that pumps lubricating oil stored in an oil pan through an oil strainer with an oil pump and supplies it to each part,
An engine characterized in that a suction pipe for sucking lubricating oil stored in an oil pan is rotatably connected to an engine body side, and the suction pipe is rotated by gravity as the engine is tilted. Lubricating oil supply device. The lubricating oil supply device for an engine according to claim 1, wherein a weight is attached to the suction pipe. The engine lubricating oil supply device according to claim 1 or 2, further comprising a roller rotatably contacting the oil pan, wherein the suction pipe is rotatably supported via the roller. The lubricating oil supply device for an engine according to claim 1 or 2, wherein a sliding member is provided for sliding contact with the oil pan, and the suction pipe is rotatably supported via the sliding member. . 3. An oil pan, wherein an annular guide rail for slidingly contacting a tip end of the oil pan is attached to the oil pan, and the suction pipe is rotatably supported via the guide rail. Engine lubricating oil supply device.

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