JP2547701B2 - Oil supply device for small engines - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small engine oil replenishing device for operating a small engine such as a gasoline engine or a diesel engine having no oil pump for lubrication for a long time without maintenance.

[0002]

2. Description of the Related Art Small engines such as a gasoline engine and a diesel engine are widely used as an easy independent power source equipment by combining with a generator.

Generally, in these small engines, all the sliding parts are usually lubricated by oil held in an oil pan integrated with a crank chamber in an engine frame. That is, the moving members such as the connecting rod and the crank shaft that are connected to the piston are incorporated in the engine frame, and the protrusions that project on the crank shaft hit the oil surface of the oil in the oil pan to cause each part to move. It is designed to scatter oil in the form of droplets and achieve good mist lubrication. Therefore, when operating a small engine, it is indispensable to maintain the oil level in the oil pan at an appropriate height and keep the oil clean. It is necessary to replenish and replace it. It should be noted that the small engine that employs such a splashing type lubrication method does not include an oil pump for oil pressure feeding at all, unlike a large engine that employs a forced lubrication method.

[0004]

According to the prior art, not only the operation of inspecting the amount and dirt of the oil in the oil pan and replenishing or replacing the oil is not only unexpectedly complicated but also Since the engine must be stopped when carrying out, the problem of unavoidable interruption of power supply was inevitable when used as a power supply facility. Especially in the case of a small engine with less than 10 horsepower or less, since the engine frame is small and the capacity of the oil pan is extremely small, it is rare that oil must be replenished and replaced every tens of hours. Absent.

Therefore, in view of the problems of the prior art, an object of the present invention is to provide an auxiliary oil tank of natural circulation type so that oil can be replenished or replaced even in a small engine having no oil pump. It is to provide an oil replenishing device for a small engine that can be continuously operated for a long time without any need.

[0006]

The structure of the present invention for achieving the above object is to provide a crank chamber of an engine which employs a splashing type lubrication method through first and second oil pipes and an air pipe. An auxiliary oil tank connected to the integrated oil pan is provided, the auxiliary oil tank forms an oil level larger than the oil level in the oil pan, and the first and second oil pipes are respectively connected to the oil pan and the auxiliary oil tank. The essential point is to connect the oil to different height positions and allow the oil to naturally circulate between the oil pan and the auxiliary oil tank.

The auxiliary oil tank can be partitioned into a pair of oil chambers that communicate with each other and are connected to the first and second oil pipes.

[0008]

According to the structure of the invention, the auxiliary oil tank is connected to the oil pan of the engine through the first and second oil pipes, and each oil pipe is connected to the oil pan and the auxiliary oil tank, respectively. Since they are connected at different heights, the oil in the oil pan and the oil in the auxiliary oil tank smoothly and naturally circulate through these oil pipes, and are automatically and constantly replenished and replaced. be able to. At this time, since the oil level of the auxiliary oil tank is larger than the oil level in the oil pan, even if some oil is consumed in the engine, the entire oil level including the auxiliary oil tank is Can hardly be changed and can be maintained properly. Further, the air pipe equalizes the internal pressures of the oil pan and the auxiliary oil tank, and keeps the oil surfaces in both of them uniform, so that the oil can be naturally circulated smoothly through the first and second oil pipes. it can.

When partitioning the auxiliary oil tank into a pair of oil chambers, each oil chamber can separate and store the used oil flowing out from the oil pan and the unused oil in the auxiliary oil tank. Since both are not mixed at the same time, clean oil can be supplied to the oil pan. It should be noted that each oil chamber can be partitioned not only by a partition plate having a communication hole but also by a suitable filter.

[0010]

Embodiments Embodiments will be described below with reference to the drawings.

The oil replenishing device for a small engine has an auxiliary oil tank 10 attached to the engine E (FIG. 1).

The engine E is a small engine such as a gasoline engine or a diesel engine. In the engine frame E1, a piston E3 reciprocating in a cylinder E2, a connecting rod E4 connected to the piston E3, a crankshaft E5, Balance weight E6 etc. are built in. An oil pan EP that is integral with the crank chamber is formed in the lower portion of the engine frame E1. Each part of the engine E uses the oil W1 in the oil pan EP by a splash-type lubrication method. It is lubricated.

A pair of oil ports EP1 and EP2 are formed in the lower portion of the oil pan EP, and an air port EP3 is formed in the upper portion of the oil pan EP. However, the oil ports EP1 and EP2 are formed at different height positions.

The auxiliary oil tank 10 is a closed tank in which a pair of oil ports 11 and 12 are opened on the opposite side surfaces and an air port 13 is opened on the upper surface. An oil inlet 14 with a cap 14a is formed on the upper surface of the auxiliary oil tank 10. However, the oil port 11,
12 are formed so that their height positions are different from each other.

The engine E and the auxiliary oil tank 10 are
The first and second oil pipes 21 and 22 are connected to each other via an air pipe 23. That is, the first and second oil pipes 21 and 22 are respectively connected to the oil ports EP1 and 11,
The oil pipe EP and the auxiliary oil tank 10 are connected at different height positions via the oil ports EP2 and EP12, and the air pipe 23 is connected between the air ports EP3 and EP13.

Oil W1 and W2 are respectively injected into the oil pan EP and the auxiliary oil tank 10 of the engine E, and oil surfaces L1 and L2 are formed at positions higher than the oil ports EP1, EP2, 11 and 12, respectively. However, in the auxiliary oil tank 10, the oil level L2 is the auxiliary oil tank 10
It shall be installed in a horizontal position at an appropriate height so that it is most widely formed inside. In addition, the auxiliary oil tank 10
Is set so that the oil level L2 is sufficiently larger than the oil level L1.
It should be formed in a large cross-sectional area.

Now, when the engine E is operated, the oil W1 in the oil pan EP is heated and expanded, so that the oil W1 is in the high position, the oil port EP1, the first oil pipe 21, and the high position oil. It flows out to the auxiliary oil tank 10 through the port 11. Therefore, the oil W2 in the auxiliary oil tank 10 flows out to the oil pan EP via the oil port 12 in the low position, the second oil pipe 22, and the oil port EP2 in the low position.
Oil W1 in oil pan EP, auxiliary oil tank 10
The oil W2 therein can smoothly circulate naturally through the first and second oil pipes 21 and 22 (in the direction of the arrow in FIG. 1). That is, the oil W1 in the oil pan EP can be continuously exchanged and replenished by the oil W2 in the auxiliary oil tank 10.

At this time, the air pipe 23 is connected to the oil pan E.
P and the upper space in the auxiliary oil tank 10 are communicated with each other to equalize the internal pressures of both, so that the oil surfaces L1 and L2 can be kept uniform. Since the oil level L2 in the auxiliary oil tank 10 is larger than the oil level L1 in the oil pan EP,
Even if the oil W1 is consumed in the engine E, the oil level L
The fluctuations of 1 and L2 can be suppressed to be sufficiently small.

The oil ports 11 and 12 provided in the auxiliary oil tank 10 are preferably provided slightly higher than the bottom surface of the auxiliary oil tank 10. Even if the oil W1 flowing out from the oil pan EP contains solid matter, the solid matter is precipitated in the auxiliary oil tank 10 and the solid matter becomes the oil W1.
This is because it is possible to prevent the oil from returning to the oil pan EP together with 2.

[0020]

[Other Embodiments] The auxiliary oil tank 10 can be partitioned into a pair of oil chambers 10a and 10b via a partition plate 15 (FIG. 2). The partition plate 15 is provided with a communication hole 15a. Therefore, the oil chambers 10a and 10b are provided with the communication hole 15a.
They are communicated with each other via a. First oil pipe 2
1. The oil W1 flowing into the one oil chamber 10a through the oil port 11 is the oil W in the auxiliary oil tank 10.
It is possible to supply the clean oil W2 to the oil pan EP for a long period of time because it is not mixed with the entire amount of 2 at once.

The partition plate 15 is used as the auxiliary oil tank 1.
The inside of 0 may be divided horizontally (FIG. 3). That is, the oil chambers 10a and 10b at this time are formed above and below the partition plate 15. In this case, the oil level L2 is formed in the upper oil chamber 10a, but the oil port 11
Need not be below the oil level L2. Also,
When the oil W1 from the oil pan EP flows into the auxiliary oil tank 10 through the oil port 11 and the oil W2 flows out through the oil port 12, the oil ports 11 and 12 and the communication hole 15a are used. It is preferable to determine the respective positions of the oils W1 and W2 so that the flow paths of the oils W1 and W2 in 10 are as long as possible.

The partition plate 15 shown in FIGS. 2 and 3 may be a plate-shaped filter, and the oil chamber 10
The sizes of a and 10b do not matter.

[0023]

As described above, according to the present invention, by providing the auxiliary oil tank connected to the oil pan of the engine through the first and second oil pipes and the air pipe, Since the oil can smoothly circulate naturally with the oil in the auxiliary oil tank and can be automatically replenished and replaced, the splashing type lubrication method is adopted, the oil pan capacity is small, and the oil pump Even if it is a small engine that does not have the above, there is an excellent effect that it can be continuously operated for a long time without maintenance.

[Brief description of drawings]

[Figure 1] Overall configuration diagram

FIG. 2 is a main part configuration diagram showing another embodiment (1)

FIG. 3 is a main part configuration diagram showing another embodiment (2)

[Explanation of symbols]

 E ... Engine EP ... Oil pan W1, W2 ... Oil L1, L2 ... Oil level 10 ... Auxiliary oil tank 10a, 10b ... Oil chamber 21 ... First oil pipe 22 ... Second oil pipe 23 ... Air pipe

Claims (2)

(57) [Claims] 1. An auxiliary oil tank is provided which is connected to an oil pan integrated with a crank chamber of an engine that employs a splash-type lubrication method through first and second oil pipes and an air pipe. The oil tank forms an oil surface that is larger than the oil surface in the oil pan, and the first and second oil pipes are respectively connected to the oil pan and the auxiliary oil tank at different height positions, An oil replenishing device for a small engine, which naturally circulates oil between an oil pan and an auxiliary oil tank. 2. The oil replenishing device for a small engine according to claim 1, wherein the auxiliary oil tanks are communicated with each other and are partitioned into a pair of oil chambers connecting the first and second oil pipes.