JPH061713U - Oil drain plug opening and closing structure for engine - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to an oil drain plug opening / closing structure provided in an oil drain hole at the bottom of an engine.
The purpose is to be able to open and close the drain plug by hand from the top of the car and in one operation. An upper end portion of a rod 10 connected to a drain plug 9 at the bottom of an engine passes through the inside of the engine and is led out to the outside 1a of the side wall of the engine, and an engaging hole portion 16 is provided in the led-out portion 10a. And an eccentric rotor 19 which is engaged with the engaging hole portion 16 and operates the rod 10 by rotation to open and close the drain plug 9, and an opening / closing operation lever 21 which rotationally operates the eccentric rotor 19. It is configured to be provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 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]

[Prior art]

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

When this oil becomes old, it needs to be replaced and replaced. At that time, after opening the oil drain hole provided at the bottom of the oil pan to drain the old oil, another oil injection hole is used. I try to inject new oil. Normally, the oil drain hole is a screw hole, and a bolt-shaped drain plug 9 having a screw plug portion and a head portion is screwed into the oil drain hole to close the oil drain hole. The drain plug 9 is opened and closed to open the oil drain hole, and the drain plug 9 is screwed and tightened to close the oil drain hole.

As described above, the oil drain hole of the engine mounted on the vehicle is located on the bottom side of the vehicle, and when changing the oil, a person loosens the drain plug 9 from below the vehicle with a tool such as a wrench. The oil drain hole is opened for removal, and after draining the oil, the tool is used to close the drain plug 9 again to close the oil drain hole.

In the figure, 2 is a cylinder head, 4 is an intake passage, and 5 is an exhaust passage.

[0006]

[Problems to be solved by the device]

 However, in such a conventional engine oil drain plug opening / closing structure, the oil is changed while the engine is mounted on the vehicle. Therefore, in order to open / close the oil drain plug on the bottom side of the vehicle, a person who lifts the vehicle or a person Since it is necessary to operate the drain plug by diving underneath, there is a problem that the oil replacement work is very complicated and troublesome and the workability is poor.

The present invention has been made in view of such a problem, and the tip of the rod connected to the drain plug is led out to the outside of the side wall of the engine, that is, the upper portion, and the opening / closing operation provided in this led-out portion. An object of the present invention is to provide an oil drain plug opening / closing structure for an engine in which the drain plug can be opened / closed by operating the lever for operation in a single operation from above the engine without using a tool.

[0008]

[Means for Solving the Problems]

 For this reason, the engine oil drain plug opening / closing structure of the present invention includes a drain plug which is provided in an oil drain hole portion at the bottom of the engine to open and close the oil drain hole portion, and is connected to the drain plug and an upper end portion thereof is connected to the drain plug. Is provided with a rod that passes through the inside of the engine and is led out to the outside of the side wall of the engine, and an engaging hole portion is provided in the leading portion where the rod is led to the outside of the side wall, and An eccentric rotor that engages with the engaging hole and operates the rod by rotation to open and close the drain plug, and an opening / closing operation lever that rotationally operates the eccentric rotor are provided. There is.

[0009]

[Action]

 In the above-mentioned oil drain plug opening / closing structure for an engine of the present invention, when the opening / closing lever outside the side wall of the engine is turned by hand, the eccentricity that engages with the engagement hole of the rod tip part connected to the drain plug on the engine bottom part The rotor rotates to move the rod up and down to open and close the oil drain plug.

Therefore, instead of opening and closing the oil drain plug from the lower side of the vehicle, it is possible to open and close the oil drain plug from the upper side of the vehicle with one operation of the hand.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show an embodiment of an oil drain plug opening / closing structure for an engine according to the present invention, and FIG. 1 shows the oil drain plug for an engine. Fig. 2 is a schematic front view of an engine having an opening / closing structure, Fig. 2 is a vertical sectional view showing a closed state of the oil drain plug opening / closing structure, and Fig. 3 is a vertical sectional view showing an open state of the oil drain plug opening / closing structure. 1-3, the same code | symbol as FIG. 4 has shown the substantially similar part.

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 the oil in the oil pan 3 is formed at the bottom of the oil pan 3, and from the outer part to the outer peripheral part. The drain plug 9 is in contact with the gasket 8 via the gasket 8.

Further, a rod 10 which is erected on the inner surface side is connected to the drain plug 9 and is coupled by a nut 23. The rod 10 passes through the inside of the cylinder block 1 and the upper end thereof is connected to the engine block 1. The lead-out portion 10a is formed by protruding to the outside of the side wall portion 1a. The position of the lead-out portion 10a is appropriate in the middle part of the engine block side wall portion 1a or in the vicinity of the upper and lower portions of the side wall portion 1a, where it does not interact with other devices or parts provided around the engine 6, and in the lead-out portion 10a. It is set so that it is easy to insert the hand from above.

It should be noted that the rod 10 penetrates a place in the engine block 1 that is not involved with the crankshaft or the like. If it is unavoidable, the rod 10 may be curved or bent. Alternatively, the rod 10 may be arranged along the inner surface of the side wall portion of the engine block 1 or may be passed through the side wall portion. The lead-out portion 10a is provided with an opening / closing operation portion 11 for opening and closing the drain plug 9, and as shown in FIGS. 2 and 3, engages with the rod upper end portion which is the lead-out portion 10a of the rod 10. A hole 20 is formed, and a case 20 is provided so as to surround the engagement hole 16 and come into contact with the outer surface of the cylinder block side wall exterior 1 a. A spring 17 is provided below the engagement hole 16. The engaging hole portion 16, that is, the rod 10 is always lifted upward so that the drain plug 9 is closed.

Further, an eccentric rotor 19 which is eccentrically attached to the support shaft 18 in an upward direction is engaged with the engaging hole portion 16, and the support shaft 18 is pivotally supported by the case 20 and is also supported. The shaft 18 is provided with a rotating lever 21 for opening / closing operation, which protrudes outside the case 20. 2 and 3, 22 is an oil seal interposed between the case 20 and the outside 1a of the side wall of the cylinder block 1, and 15 is a reinforcing edge portion provided on the inner edge portion of the oil drain hole portion 7. .

With such a configuration, when the rotating lever 21 for opening / closing operation is rotated as shown by the arrow a in the closed state of the drain plug 9 shown in FIG. 2, the eccentric rotor 19 also rotates in the same direction and its bulging portion. Rotates from the upper side to the lower side and pushes the engaging hole portion 16, that is, the rod 10 downwards against the spring 17, and opens the drain plug 9 to open the oil drain plug opening / closing structure as shown in FIG. State.

On the contrary, when the opening / closing operation rotary lever 21 is rotated as shown by an arrow b in the opened state of the drain plug 9 shown in FIG. 3, the eccentric rotor 19 also rotates in the same direction and its bulging portion is lowered. From the side to the upper side, the engaging hole portion 16, that is, the rod 10 is pushed upward with the help of the spring 17, and the drain plug 9 is closed to close the oil drain plug opening / closing structure 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 vehicle, inserting a hand from above and turning the opening / closing lever 21. There is no need to work from the side with tools, etc., and you can easily perform oil change work with only one hand from above, and it is extremely convenient without worrying that your hands, clothes, etc. will get dirty with oil.

[0019]

[Effect of device]

 As described in detail above, according to the oil drain plug opening / closing structure for an engine of the present invention, the drain plug is provided in the oil drain hole at the bottom of the engine and opens / closes the oil drain hole. A rod that is connected and has its upper end passing through the inside of the engine and led out to the outside of the side wall of the engine is provided, and an engaging hole portion is provided at the lead-out portion where the rod is led to the outside of the side wall. And an eccentric rotor that is engaged with the engaging hole and operates the rod by rotation to open and close the drain plug, and an opening / closing operation lever that rotationally operates the eccentric rotor. Since it is possible to change the engine oil by operating the lever for opening and closing operation with one hand from the top of the car, the work can be done very easily and easily. It can be done without, thereby there is an advantage that helps cover to improve the workability.

[Brief description of 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 cross-sectional view showing a closed state of the present oil drain plug opening / closing structure.

FIG. 3 is a partial vertical cross-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]

 1 Cylinder Block 1a Side Wall External 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 11 Open / Close Operation 15 Reinforcement Edge 16 Engagement Hole 17 Spring 18 Spindle 19 Eccentric rotor 20 Case 21 Open / close operation rotary lever 22 Oil seal 23 Nut

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. An oil drain hole at the bottom of an engine, comprising a drain plug for opening and closing the oil drain hole, the upper end of which is connected to the drain plug and passes through the inside of the engine. A rod that is led out to the outside of the side wall is provided, and an engaging hole portion is provided in a lead-out portion where the rod is led to the outside of the side wall, and the rod is engaged by the engaging hole portion and is rotated to rotate the rod. An oil drain plug opening / closing structure for an engine, comprising: an eccentric rotor that is operated to open / close the drain plug; and an opening / closing operation lever that rotationally operates the eccentric rotor.