JP2571021Y2 - Engine oil drain plug opening and closing structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil drain plug opening / closing structure provided in an oil drain hole at the bottom of an oil pan of an engine.

[0002]

2. Description of the Related Art FIG. 4 is a schematic front view of an engine having a conventional oil drain plug opening / closing structure. This figure 4
1, an oil pan 3 is provided below the cylinder block 1 of the automobile engine 6, and engine oil for lubricating various parts of the engine is stored therein.

[0003] When the oil becomes old, it is necessary to replace the oil. In this case, an oil drain hole provided at the bottom of the oil pan is opened to extract the old oil, and then another oil injection hole is used. I try to inject. Normally, the oil drain hole is a screw hole, into which a bolt-shaped drain plug 9 composed of a screw plug and a head is screwed and closed. When the drain plug 9 is turned and removed, an oil drain hole is opened. On the contrary, when the screw is tightened by screwing, the oil drain hole is closed.

As described above, the oil drain hole of the engine mounted on the vehicle is located on the bottom side of the vehicle.
At the time of oil change, a person loosens and removes the drain plug 9 with a tool such as a wrench from below the vehicle to open an oil drain hole, and after draining oil, closes the drain plug 9 again with a tool to close the oil drain hole. Like that.

In the drawings, reference numeral 2 denotes a cylinder head, 4 denotes an intake passage, and 5 denotes an exhaust passage.

[0006]

However, in such a conventional oil drain plug opening / closing structure for an engine, since the oil is changed while the engine is mounted on the engine, it is necessary to open / close the oil drain plug on the bottom side of the vehicle. It is necessary to operate the drain plug by lifting the car or a person diving under the car, and there is a problem that the oil replacement operation is very complicated and troublesome, and the workability is poor.

The present invention has been made in view of the above-mentioned problems, and a leading end of a rod connected to a drain plug is led out of the side wall of the engine, that is, an upper part thereof, and an opening / closing operation lever provided in the leading part is provided. By operating, the drain plug can be opened and closed in one operation without using a tool from above the engine,
An object of the present invention is to provide an engine oil drain plug opening / closing structure.

[0008]

SUMMARY OF THE INVENTION Accordingly, an engine oil drain plug opening / closing structure according to the present invention includes a drain plug provided in an oil drain hole at the bottom of the engine to open and close the oil drain hole. A rod connected to the plug and having an upper end portion passing through the inside of the engine and leading out of the side wall of the engine is provided, and an engaging hole is formed in a leading portion where the rod is led out of the side wall. And an eccentric rotator that is engaged with the engagement hole to operate the rod by rotation to open and close the drain plug, and an open / close operation lever that rotationally operates the eccentric rotor. It is characterized by having.

[0009]

In the engine oil drain plug opening / closing structure of the present invention described above, when the opening / closing operation lever on the outside of the engine side wall is manually turned, the engagement with the engagement hole of the rod end connected to the drain plug on the engine bottom is made. The eccentric rotor rotates to move the rod up and down to open and close the oil drain plug.

Therefore, the oil drain plug can be opened and closed by one hand operation from the upper side of the vehicle, instead of opening and closing the oil drain plug from the lower side of the vehicle.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an oil drain plug opening / closing structure for an engine according to an embodiment of the present invention; FIG.
FIG. 1 is a schematic front view of an engine having the engine oil drain plug opening / closing structure, FIG. 2 is a longitudinal sectional view showing a closed state of the oil drain plug opening / closing structure, and FIG. 3 is an open state of the oil drain plug opening / closing structure. FIG. 4 is a longitudinal sectional view, and in FIGS. 1 to 3, the same reference numerals as those in FIG. 4 indicate substantially the same parts.

In FIG. 1, 1 is a cylinder block, 2 is a cylinder head, 3 is an oil pan, 4 is an intake passage, 5 is an exhaust passage, and these constitute a main part of the engine 6. As shown in FIGS. 2 and 3, an oil drain hole 7 for draining oil in the oil pan 3 is formed at the bottom of the oil pan 3, and a gasket is formed from the outside to the outer peripheral edge. The drain plug 9 is in contact with the drain plug 9 through the drain plug 8.

Further, a rod 10 which stands upright on the inner surface side is connected to the drain plug 9 and is connected with a nut 23. The rod 10 passes through the inside of the cylinder block 1 and has an upper end portion on the side wall of the engine block 1. Part 1a
Projecting out from the outside to form a lead-out portion 10a. The position of the lead-out portion 10a is determined by the position of the engine block side wall portion 1a.
The middle part or the vicinity of the upper and lower parts is appropriate, and is set to a place that is not involved with other devices or parts provided around the engine 6 and that is easy to insert a hand into the lead-out part 10a from above. is there.

The rod 10 penetrates a portion of the engine block 1 that is not involved with the crankshaft or the like. If the rod 10 is unavoidably involved, the rod 10 may have a curved or bent shape. The rod 10 may extend along the inner surface of the side wall of the engine block 1 or may pass through the side wall. The lead-out portion 10a is provided with an opening / closing operation portion 11 for opening / closing the drain plug 9. As shown in FIGS. 2 and 3, an engaging hole is formed in the rod upper end portion which is the lead-out portion 10a of the rod 10. A case 20 is provided to surround the engagement hole 16 and to be in contact with the outer surface of the cylinder block side wall exterior 1a. A spring 17 is provided below the engagement hole 16. The engaging hole 16, that is, the rod 10 is always lifted upward to close the drain plug 9.

Further, an eccentric rotator 19 which is mounted eccentrically to the support shaft 18 in an upward direction is engaged with the engagement hole portion 16, and the support shaft 18 is supported by a case 20. A rotation lever 21 for opening and closing operation is provided on 18 to protrude outside the case 20. 2 and 3
Reference numeral 22 denotes an oil seal interposed between the case 20 and the outer side wall 1a of the cylinder block 1, and reference numeral 15 denotes a reinforcing edge provided at an inner edge of the oil drain hole 7.

With this configuration, when the opening / closing operation rotary lever 21 is turned as shown by the arrow a in the closed state of the drain plug 9 shown in FIG. 2, the eccentric rotor 19 also turns in the same direction and its bulging portion is formed. Pivots downward from above, and pushes down the engaging hole 16, that is, the rod 10, against the spring 17, and opens the drain plug 9 to open the oil drain plug opening / closing structure as shown in FIG. 3. I do.

On the contrary, the opening / closing operation rotary lever 21
When the drain plug 9 is opened as shown in FIG. 3 and the eccentric rotor 19 is turned in the same direction as the arrow b, the bulging portion turns from the lower side to the upper side. That is, the rod 10 is pushed upward with the help of the spring 17, and the drain plug 9 is closed as shown in FIG.

Therefore, when changing the engine oil, the drain plug 9 can be opened and closed simply by opening the hood of the car, inserting the hand from above and turning the opening / closing operation lever 21. There is no need to work with tools or the like, and the oil change operation can be easily performed with only one operation from above, and it is very convenient without having to worry about hands and clothes becoming dirty with oil.

[0019]

As described above in detail, according to the engine oil drain plug opening / closing structure of the present invention, a drain plug is provided in the oil drain hole at the bottom of the engine to open and close the oil drain hole. A rod connected to the drain plug and having an upper end portion passing through the inside of the engine and being led out of the side wall of the engine is provided. And an eccentric rotator that is engaged with the engagement hole to operate the rod by rotation to open and close the drain plug, and an open / close operation lever that rotationally operates the eccentric rotor. The engine oil can be changed only by hand from the top of the car, and by operating the opening / closing lever in one operation, the engine oil can be changed very easily and easily. One that can be performed without soiling, thereby there is an advantage that help greatly improve the workability.

[Brief description of the drawings]

FIG. 1 is a schematic front view of an engine having an oil drain plug opening / closing structure according to an embodiment of the present invention.

FIG. 2 is a partial vertical sectional view showing a closed state of the oil drain plug opening / closing structure.

FIG. 3 is a partial longitudinal sectional view showing an open state of the oil drain plug opening / closing structure.

FIG. 4 is a schematic front view of an engine having an oil drain plug opening / closing structure according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder block 1a Outer side wall 2 Cylinder head 3 Oil pan 4 Intake passage 5 Exhaust passage 6 Engine 7 Oil drain hole 8 Gasket 9 Drain plug 10 Rod 10a Rod lead-out part 11 Opening / closing operation part 15 Reinforcement edge part 16 Engagement hole part 17 Spring 18 Support shaft 19 Eccentric rotor 20 Case 21 Rotating lever for opening and closing operation 22 Oil seal 23 Nut

Claims (1)

(57) [Scope of request for utility model registration] A drain plug provided in an oil drain hole at a bottom portion of the engine to open and close the oil drain hole, the drain plug being connected to the drain plug, and having an upper end portion passing through the engine; A rod extending out of the side wall is provided, and an engaging hole is provided in a leading portion in which the rod is extended out of the side wall, and the rod is engaged with the engaging hole to rotate the rod. An oil drain plug opening / closing structure for an engine, comprising: an eccentric rotator that operates to open and close the drain plug; and an opening / closing operation lever that rotates the eccentric rotator.