JPH11326012A - Oil level gauge structure of engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To adjust an engine to an appropriate oil-feeding state and to realize an appropriate oil-feeding regardless an installing place by attaching a level finder through which a person can watch a liquid surface of a stored oil in an oil reservoir to one side wall of the oil reservoir and indicating an upper limit level mark on the level finder or a neighborhood thereto coincident with an upper limit level when the engine is in an appropriate oil-feeding state. SOLUTION: A finder 43 through which a person can watch a liquid surface of a stored oil 16 in an oil reservoir 14 is provided on a side wall opposed to an oil- feeding port 40 of the oil reservoir 14 of an engine and an upper limit level mark coincident with an upper limit level is indicated on the finder 43 or a periphery portion thereof when the engine is an appropriate oil-feeding state. When an oil is supplied to the oil reservoir 14, a person can watch a liquid surface of the oil 16 in the oil reservoir 14 from the level finder 43 opposed to the oil supplying port 40 and if the liquid surface is coincident with the upper limit level mark, the engine is in the appropriate oil-feeding state and as a result, the oil-feeding is carried out to a predetermined upper limit level. When the liquid surface is not coincident with the upper limit lever mark, the state of the engine is slightly adjusted to make the liquid surface coincident with the upper limit level mark.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an oil supply port provided on one side wall of an oil reservoir of an engine, and a lower edge of the oil supply port when the engine is in an appropriate oil supply position. The present invention relates to an oil level gauge structure for an engine, which is arranged so as to coincide with an upper limit level and an oil cap is fitted to the filler port.

[0002]

2. Description of the Related Art The oil level gauge structure of such an engine has been widely used in stationary engines and motorcycle engines.

[0003]

When oil is supplied to the oil reservoir of an engine having such an oil level gauge structure, the oil is supplied from the oil supply port to the oil reservoir while the engine is held in an appropriate lubrication position. If the refueling is finished just before the injected oil overflows from the filler port, it means that the oil reservoir has been refilled to the specified upper limit level. However, depending on the location of the engine, it may be difficult to give the engine a proper refueling position. If refueling is performed with the engine tilted, the amount of oil stored in the oil reservoir may be too large. , Too little, which is not desirable.

The present invention has been made in view of such circumstances, and when refueling an oil reservoir, the engine can be adjusted to an appropriate refueling position regardless of the installation location of the engine, and a specified upper limit level is provided. It is an object of the present invention to provide an engine oil level gauge structure capable of accurately supplying oil to the engine.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an oil supply port provided on one side wall of an oil reservoir of an engine. In the oil level gauge structure of the engine, the rim is arranged so as to coincide with the upper limit level of the oil storage amount in the oil reservoir, and an oil cap is fitted to the oil supply port. A level finder which can see through the liquid level of the stored oil is provided, and an upper limit level mark which coincides with the upper limit level when the engine is in an appropriate refueling position is displayed on the level finder or a periphery thereof. .

[0006] According to this feature, at the time of oil supply from the oil supply port to the oil reservoir, the oil level in the oil reservoir seen from the level finder rises just before the oil injected into the oil reservoir overflows from the oil supply port. Fine-tune the attitude of the engine so that it matches the upper limit level mark. This makes it possible to easily and accurately refuel the oil reservoir up to a specified upper limit level regardless of the inclination of the engine installation location.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on one embodiment of the present invention shown in the accompanying drawings.

FIG. 1 is a perspective view showing a use state of a power trimmer using an air-cooled engine having an oil level gauge structure according to the present invention as a power source, FIG. 2 is a vertical front view of the engine, and FIG. 3 is a line 3-3 in FIG. 4 is a sectional view taken along line 4-4 of FIG. 2, FIG. 5 is a sectional view taken along line 5-5 of FIG. 4, and FIG. 6 is a side view of a power trimmer showing a refueling attitude of the engine.

First, as shown in FIG.
Is configured as a hand-held type and is attached to, for example, a drive unit of a power trimmer T. Since the power trimmer T is used with the cutting tool oriented in all directions depending on the working state, the engine E is also tilted or inverted upside down each time, and the driving posture is not constant.

Referring to FIGS. 2 and 3, a carburetor 2 and an exhaust muffler 3 are respectively attached to an engine body 1 of the air-cooled engine E before and after the engine body 1, and an air cleaner 4 is attached to an inlet of the carburetor 2 at an intake path. . A fuel tank 5 is disposed along the lower part from one side of the engine body 1, and a fuel cap 5a is screwed into an inlet at the upper end thereof. Vaporizer 2
Is equipped with a diaphragm pump for pumping fuel from the fuel tank 5 using the intake pulsation of the engine E and returning excess fuel to the tank 5, and supplies fuel to the intake port of the engine E in any posture. I am getting it.

The engine body 1 is composed of a cylinder block 6 with an integrated head and a crankcase 7 joined to the lower end surface of the cylinder block 6. The cylinder block 6 is a single cylinder containing a piston 8. 9 is provided at the center, and a number of cooling fins 10 are provided on the outer periphery thereof.

The crankcase 7 comprises a pair of upper and lower case halves 7a, 7b bolted to each other, and is connected to a piston 8 via a connecting rod 11.
2 is supported between the two case halves 7a, 7b.

An oil reservoir 14 adjacent to the crank chamber 13 is formed at one end of the crankcase 7, and an oil slinger 15 for stirring oil 16 stored in the chamber 14 to generate oil mist is provided on a crankshaft. 12 is fixed. The oil mist generated in the oil sump 14 is supplied to the engine E
Are supplied for lubrication to each part.

At one end of the crankshaft 12, a rotor 21 with a cooling fan 20 of a flywheel magneto 19 is fixed, and a centrifugal clutch 22 is interposed between the rotor 21 and a working machine drive shaft 23.

The engine body 1 has a baffle plate 24 covering the periphery of the rotor 21 and the cylinder block 6, and a lower cover 2 covering the lower surface of the engine body 1 together with the fuel tank 5.
5, a cooling air passage 26 extending from the lower portion of the engine E to the periphery of the exhaust muffler 3 through the periphery of the rotor 21 is formed.
Is provided on the peripheral wall of. Therefore, when the cooling fan 20 is driven to rotate by the crankshaft 12 during the operation of the engine E, the outside air sucked into the inlet 26i, that is, the cooling air, cools the fuel tank 5, the crankcase 7 and the cylinder block 6 sequentially. While passing through the cooling air passage 26, the exhaust muffler 3 is finally cooled and discharged to the outside.

The lower cover 25 is made of synthetic resin and has a plurality of mounting bosses 30 protruding from the lower surface of the engine body 1.
Is fixed by bolts 31. This lower cover 25
Is a support wall 32 ₁ of the one in the center portion upper surface, and the end sides provided with a pair of support bosses 32 _2, the minor axis 33 is resilient grommets formed in a lower portion of the tip of the fuel tank 5 34 is supported fitted to the support wall 32 ₁ of the hole through the middle portion a pair of support arms 35 projecting from the side surfaces of the fuel tank 5 is fixed by the support boss 32 ₂ the bolt 36.

As shown in FIG. 2, a support plate 37 projecting outward is integrally formed on one side of the lower cover 25 on the side of the centrifugal clutch 22. The support plate 37 has a lower surface. A plurality of (two in the illustrated example) leg pieces 38 extending in a direction perpendicular to the crankshaft 12 are integrally provided. As shown in FIG. 6, when these leg pieces 38 and the blade cover Ta of the power trimmer T are grounded on the flat ground G, the engine E takes an appropriate refueling posture.

A part 1a of the engine body 1 is opposed to the upper surface of the support plate 37 with a small gap s. Thus, when the leg 38 is grounded vigorously, the elastic deformation of the synthetic resin support plate 37 can absorb the ground impact, and the support plate 37 contacts the part 1a of the engine body 1. Thereby, its excessive deformation can be prevented, and its durability can be ensured.

4 and 5, an oil supply port 40 is provided on one side wall of the oil reservoir 14. The oil supply port 40 is arranged such that the lower edge of the oil supply port 40 coincides with a prescribed upper limit level of the amount of oil stored in the oil storage chamber 14 when the engine E takes the above-described oil supply attitude. An oil cap 42 having a level gauge rod 41 at the inner end is detachably screwed to the oil filler port 40.

The other side wall of the oil reservoir 14 is provided with a level finder 43 for seeing through the interior of the chamber 14. The level finder 43 is constructed by fitting a transparent synthetic resin finder plate 45 in a circular opening 44 on the other side wall of the oil reservoir 14 in an oil-tight manner. This finder plate 45 has
A reflecting plate 46 is provided on the inner surface of the reflecting plate 46 with a predetermined gap therebetween, and the stored oil 16 in the oil reservoir 14 can freely enter and exit between the finder plate 45 and the reflecting plate 46. Therefore, using the reflected light from the reflector,
The level of the stored oil 16 in the oil reservoir 14 can be easily seen from the finder plate 45.

On the finder plate 45 or on the outer surface of the engine body 1 around the finder plate 45, when the engine E takes the above-described lubricating attitude, the upper limit and the lower limit level respectively corresponding to the prescribed upper and lower levels of the oil storage amount in the oil reservoir 14 are provided. The level mark A and the lower limit level mark L are displayed.

In front of the level finder 43, a protective wall 25a for preventing other objects from contacting the finder plate 45 is arranged. The protective wall 25a is formed integrally with the lower cover 25.

Next, the operation of this embodiment will be described.

When oil is supplied to the oil reservoir 14 of the engine E, first, as shown in FIG.
8 and the power tool trimmer T so that the blade cover Ta is grounded.
On the flat ground G, remove the oil cap 42,
Oil is injected from the oil supply port 40 into the oil reservoir 14. Then, before the oil injected into the oil reservoir 14 overflows from the oil supply port 40, the oil supply is temporarily stopped. At this time, refueling port 40
The liquid level of the oil 16 in the oil reservoir 14 is seen through the level finder 43 on the opposite side from the above, and if the liquid level matches the upper limit level mark A, the engine E is in a proper lubrication position. This means that refueling has been performed to the specified upper limit level.

However, when the ground G on which the power trimmer T is placed is inclined, the oil level as seen from the level finder 43 does not match the upper limit level, and comes above or below it. In such a case, the power trimmer T, that is, the attitude of the engine E is finely adjusted, and the oil sump 14 is adjusted.
Immediately before the oil in the tank overflows from the oil supply port 40, the oil level seen from the level finder 43 is made to coincide with the upper limit level. Thus, regardless of the inclination of the ground G where the power trimmer T is installed, it is possible to easily and accurately refuel the oil reservoir 14 up to the prescribed upper limit level.

In the case of the illustrated example, when the oil is discharged from the oil reservoir 14, the oil cap 42 is removed and the engine E is tilted to discharge the oil from the oil supply port 40.

The present invention is not limited to the above embodiments, and various design changes can be made without departing from the gist of the present invention. For example, the oil level gauge structure of the present invention can be applied to a stationary engine or a work vehicle engine.

[0028]

As described above, according to the present invention, the oil supply port provided on one side wall of the oil reservoir of the engine is connected to the lower edge of the oil supply port when the engine is in an appropriate oil supply position. In the engine oil level gauge structure, which is arranged so as to match the upper limit level of the oil storage amount and an oil cap is fitted to this oil supply port, the level of the stored oil inside the oil storage chamber is A see-through level finder is attached, and an upper limit level mark that matches the upper limit level is displayed on the level finder or its surroundings when the engine is in an appropriate refueling position. Before the oil injected into the sump overflows from the oil supply port, the engine position is fine-tuned so that the oil level in the sump seen from the level finder matches the upper limit level mark. Cormorants, by a very simple operation, inclined irrespective of the location of the engine, to the oil reservoir chamber, facilitating oil supply to the upper limit level defined, can be accurately performed.

[Brief description of the drawings]

FIG. 1 is a perspective view of a use state of a power trimmer powered by an engine having an oil level gauge structure according to an embodiment of the present invention.

FIG. 2 is a vertical sectional front view of the engine.

FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;

FIG. 4 is a sectional view taken along line 4-4 of FIG. 2;

FIG. 5 is a sectional view taken along line 5-5 of FIG. 4;

FIG. 6 is a side view of a power trimmer showing a refueling attitude of the engine.

[Explanation of symbols]

 14 oil reservoir 40 oil filler 42 oil cap 43 level finder E engine A upper limit level mark L・ Lower level mark

Continued on the front page (72) Inventor Yoshikazu Yamada 1-4-1 Chuo, Wako-shi, Saitama Pref.

Claims (1)

[Claims] An oil supply port (40) provided on one side wall of an oil reservoir (14) of an engine (E) is connected to a lower edge of the oil supply port (40) when the engine (E) is in an appropriate oil supply position. Are arranged so as to coincide with the upper limit level of the amount of oil stored in the oil reservoir (14), and the oil cap (4) is
In the oil level gauge structure of the engine fitted with 2), a level finder (43) is provided on the other side wall of the oil reservoir (14) so as to see through the liquid level of the stored oil therein. (43) An oil level gauge structure for an engine, wherein an upper limit level mark (A) which coincides with the upper limit level is displayed when the engine (E) is in a proper refueling position at or around the engine.