JPH11173133A - Drain plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain plug to prevent flying of oil through prevention of discharge in an axial direction through a drain plug when oil is discharged. SOLUTION: A drain plug 1 is arranged at the side 35 of an oil pan 3 to store oil 6 and securely screwed in the oil discharge port 20 of a drain seat 2 for discharge of oil. The drain plug 1 comprises a body part 13 screwed in the oil discharge port 20; a head part; an introduction oil passage 11 running from the tip surface 16 of the body part 13 along an axial direction; and a discharge oil passage 12 opened to extending from the introduction oil passage 11 and opened to the outer peripheral surface 17 of the body part 13. By unscrewing the drain plug 1 securely screwed in the drain seat 2, at least a part of the opening part 120 of the discharge oil passage 12 is released to an external part 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain plug provided in an oil pan of an engine for driving, for example, a refrigerator, and more particularly to a drain plug capable of preventing splashing of oil when discharging engine oil.

[0002]

2. Description of the Related Art For example, when an engine for driving a refrigerator or the like is mounted on a frame of a vehicle or the like, there are many cases where the layout on mounting the engine is restricted. For example, FIG.
As shown in the figure, the height h from the bottom surface 37 of the oil pan 3 located at the bottom of the engine (not shown) to the machine base 7 of the vehicle.
May not be able to be taken significantly. In this case, it is difficult to discharge the oil from the bottom surface 37 of the oil pan 3. Therefore, the drain sheet 2 for discharging oil may be provided on the side surface 35 of the oil pan 3.

In this case, a drain plug 9 (FIG. 6) provided on a side surface 35 of an oil pan 3 for storing oil 6 has a gasket 4.
Is screwed in and fixed.

[0006] As shown in FIG. 6, the drain plug 9 is screwed to the drain seat 2 to plug the oil discharge port 20, and the gasket 4 is fixed to the oil pan 3 when the drain plug 9 is fixed. A flange 94 for pressing the drain plug 9 and a drain plug 9
And a hexagonal portion 95 for rotating.

When draining the oil, the drain plug 9 is removed from the drain seat 2. Thereby, the oil discharge port 20 of the drain seat 2 is opened, and the oil 6 inside the oil pan 3 is discharged to the outside 5.

[0006]

However, in the conventional oil pan 3, as shown in FIG. 5, the drainage of the oil 6 is performed by completely removing the main body 93 of the drain plug 9 from the drain seat 2. In addition, a drain sheet 2 for discharging oil is provided on a side surface 35 of the oil pan 3.

Therefore, the oil 6 in the oil pan 3
Is released from the drain seat 2 in a substantially horizontal direction, and when the width w from the side surface 35 of the oil pan 3 to the frame 75 of the vehicle is narrow, the released oil 6 scatters on the frame 75. Then, the machine base 7 is soiled. The oil 6 is extracted from an oil outlet 70 provided in the machine base 7 to a receiving tray 61 below the oil outlet 70.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a drain plug which can prevent the drain plug from being discharged in the axial direction when discharging the oil, thereby preventing the oil from scattering. It is assumed that.

[0009]

According to a first aspect of the present invention, there is provided a drain plug provided on a side surface of an oil pan for storing oil and screwed and fixed to an oil discharge port of a drain sheet for discharging oil. A main body portion to be screwed, a head provided at a rear end of the main body portion, an introduction oil passage provided along an axial direction from a front end surface of the main body portion, and a main body portion extending from the introduction oil passage to the main body portion. A drain oil passage opened on the outer peripheral surface of the drain oil passage, and by loosening the drain plug screwed into the drain seat, at least a part of the opening of the discharge oil passage is opened to the outside. A drain plug characterized by being configured as described above.

The most remarkable point in this embodiment is that the drain plug has an introduction oil passage provided along the axial direction from the front end surface thereof and a discharge oil passage opened from the introduction oil passage to the outer peripheral surface. Is to have. The introduction oil passage itself is not a through hole. By connecting the introduction oil passage and the discharge oil passage, an oil passage communicating from the tip of the main body of the drain plug to the outer periphery of the main body is provided.

The opening of the drain oil passage is a position where the drain plug is screwed most deeply and screwed into the drain seat and closed at the inside of the oil pan, and the drain plug is loosened. In the case where the drain plug is screwed into the drain seat in a state where the depth of the drain plug is reduced and the part of the drain plug is screwed into the drain seat, it is provided at a position opened to the outside of the oil pan.

Next, the operation of the present invention will be described. The drain plug of the present invention has the above-described introduction oil passage and discharge oil passage. Therefore, the oil can be discharged with a part of the drain plug screwed into the drain seat without completely removing the drain plug.

That is, when the drain plug is loosened and the opening of the discharge oil passage is opened to the outside of the oil pan, first, the oil inside the oil pan flows through the opening at the tip end surface of the drain plug. It flows into the above-mentioned introduction oilway. Next, the oil flowing in the introduction oil passage along the axial direction of the drain plug enters the discharge oil passage of the drain plug, changes the traveling direction, and heads toward the opening of the discharge oil passage. Next, the oil is discharged from the opening of the discharge oil passage toward the opening direction of the opening, and is discharged to the outside of the oil pan.

Therefore, the oil whose traveling direction has been changed in the opening direction of the discharge oil passage is not discharged vigorously in the axial direction of the drain plug. Therefore, it is possible to prevent the oil from scattering over a wide range. Further, in draining the oil, it is not necessary to completely remove the drain plug from the drain seat, so that the workability of draining the oil can be improved.

The drain oil passage of the drain plug is
Direction (radial direction) perpendicular to the axial direction of the drain plug
Is preferably provided along. In this case, the oil can be discharged substantially directly below by positioning the opening of the discharge oil passage downward.

Next, it is preferable that a plurality of the discharge oil passages are provided in a radial direction.
In this case, since the oil is discharged from the plurality of discharge oil passages simultaneously, the oil can be discharged quickly. Preferably, the plurality of discharge oil passages are provided radially on the outer peripheral surface side with the introduction oil passage as a center when viewed from the axial direction of the drain plug. Thereby, the discharge oil passage can be easily formed.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A drain plug according to an embodiment of the present invention will be described.
This will be described with reference to FIGS. The drain plug of this example is a specific example of a drain plug provided in an oil pan of an engine for driving a refrigerator mounted on a vehicle. As shown in FIG. 1, the drain plug 1 of the present embodiment
Is screwed and fixed to the oil discharge port 20 of the drain sheet 2 for oil discharge, which is provided on the side surface 35 of the oil pan 3 for storing the oil.

As shown in FIG. 2, the drain plug 1 has a main body 13 which is screwed into the oil discharge port 20.
And a head provided at the rear end of the main body 13, and an introduction oil passage 11 provided along the axial direction from a front end face 16 of the main body. 13
And a discharge oil passage 12 opened on the outer peripheral surface 17 of the oil passage. As shown in FIG. 1, by loosening the drain plug 1 screwed into the oil discharge port 20 of the drain seat 2, at least a part of the opening 120 of the discharge oil passage 12 is opened to the outside 5. It is configured to:

The oil pan 3 is a large oil pan having a capacity of about 12 liters and a height of about 20 cm. Also, since there is a restriction on the layout of mounting the engine (not shown), as shown in FIG. 1, the height h from the bottom surface 37 of the oil pan 3 to the machine base 7 of the vehicle is 2 cm, and the side surface 35 of the oil pan 3 Width w from the vehicle to the frame 75 is 20
cm, relatively narrow.

An oil outlet 20 of the drain seat 2 is provided substantially perpendicular to the side surface 35 of the oil pan 3. That is, the axial direction of the drain plug 1 is substantially perpendicular to the side surface 35 of the oil pan 3.

The drain plug 1 is screwed to a drain seat 2 as shown in FIGS.
0 and a ring-shaped gasket 4 when the drain plug 9 is fixed to the oil pan 3.
And a hexagonal portion 15 serving as a head for rotating the drain plug 1 when the drain plug 1 is attached and detached.

The main body 13 is, as shown in FIGS.
It has the introduction oil passage 11 and the discharge oil passage 12. As shown in FIG. 2, the introduction oil passage 11
Is a hole drilled by a cutting tool using a lathe in the axial direction. Note that this is not a through hole itself. The discharge oil passage 12 is a hole formed in the drain plug 1 in a radial direction as shown in FIG.

Also, as shown in FIG.
The second opening 120 is located on the base end side of the main body 13.
This is because the opening 120 is positioned outside the oil pan 3 while the tip 136 of the main body 13 is screwed into the drain seat 2.

Next, the operation of this embodiment will be described. The drain plug 1 according to the present embodiment includes the introduction oil passage 11 and the discharge oil passage 12.
And Therefore, the oil 6 can be discharged while the tip 136 of the drain plug 1 is screwed into the oil discharge port 20 of the drain seat 2.

That is, by loosening the drain plug 1,
When the opening 120 of the discharge oil passage 12 is opened to the outside 5 of the oil pan 3, first, the oil 6 inside the oil pan 3 is introduced from the opening 160 at the tip end surface 16 of the drain plug 1. It flows into the oil passage 11.
Next, the oil 6 flowing in the introduction oil passage 11 in a substantially horizontal direction enters the discharge oil passage 12 of the drain plug 1 and changes its traveling direction by approximately 90 degrees. Head to. Next, the oil 6 is discharged from the opening 120 of the discharge oil passage 12 toward the opening direction (substantially vertical direction) of the opening 120, and the oil pan 3
Is discharged to the outside 5.

Therefore, the oil 6 whose traveling direction has been changed in the opening direction of the discharge oil passage 12 is not discharged vigorously in the axial direction of the drain plug 1. Therefore, it is possible to prevent the oil from scattering over a wide range. In addition, as shown in FIG. 1, it is not necessary to completely remove the drain plug 1 from the drain seat 2 as shown in FIG. I just need. Therefore, the workability of oil discharge can be improved.

Further, the opening 120 of the discharge oil passage 12
Since the oil 6 is discharged almost directly below by positioning the oil downward, the oil 6 can also be prevented from being discharged laterally and upward.

According to the drain plug 1 of the present embodiment, the oil 6 does not contaminate the frame 75 and the machine base 7 from the oil outlet 70 provided in the machine base 7 to the receiving tray 61 thereunder. Can be removed.

While the drain plug 1 is loosened with a wrench or the like, the opening 120 of the discharge oil passage 12 is located laterally and upward with the opening 120 opened to the outside 5 of the oil pan 3. In some cases, however, the oil 6 flows downward along the outer peripheral surface 17 of the drain plug 1, so that the oil 6 does not scatter.

Embodiment 2 As shown in FIG. 4, this embodiment is configured such that, when viewed from the axial direction of the drain plug 1, the outer peripheral surface 1 around the introduction oil passage 11 is provided.
On the seventh side, three discharge oil passages 121 to 123 are provided radially. Other configurations are the same as those of the first embodiment.

In the drain plug of this embodiment, the oil 6 is discharged from the three discharge oil passages 121 to 123 at the same time, so that the oil 6 can be discharged quickly. Others have the same operation and effects as the first embodiment.

[0032]

As described above, according to the present invention, it is possible to provide a drain plug capable of preventing the drain plug from being discharged in the axial direction when discharging the oil, thereby preventing the oil from scattering.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram according to a first embodiment when oil is discharged by a drain plug.

FIG. 2 is a perspective view of a drain plug according to the first embodiment.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is a cross-sectional view illustrating a drain oil passage of a drain plug according to a second embodiment.

FIG. 5 is an explanatory view according to a conventional example when oil is discharged by a drain plug.

FIG. 6 is a perspective view of a drain plug according to a conventional example.

[Explanation of symbols]

 1. . . 10. drain plug, . . Introduction oil channel, 12. . . Discharge oil channel, 120. . . Opening, 13. . . Body part, 16. . . 17. Tip face, . . Outer peripheral surface, 2. . . 2. drain seat, . . Oil pan, 35. . . Aspect, 37. . . Bottom, 5. . . External, 7. . . Machine stand, 75. . . flame,

Claims (2)

[Claims] 1. A drain plug provided on a side surface of an oil pan for storing oil and screwed into an oil discharge port of a drain sheet for oil discharge, the main body being screwed into the oil discharge port; A head provided at a rear end of the main body, an introduction oil passage provided along the axial direction from a front end surface of the main body, and a discharge opening from the introduction oil passage to an outer peripheral surface of the main body. An oil passage, and at least a part of the opening of the discharge oil passage is opened to the outside by loosening the drain plug screwed and fixed to the drain seat. Drain plug featured. 2. The drain plug according to claim 1, wherein a plurality of the discharge oil passages are provided in a radial direction.