JP3013478B2 - Oil extraction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for extracting high-viscosity liquids such as engine oil and torque converter oil.

[0002]

2. Description of the Related Art Engine oil, torque converter oil, etc.
It is replaced when the vehicle has traveled for a predetermined period or distance. For example, when replacing the engine oil, a metal or resin tube is inserted from a gauge port of the engine oil of the automobile, and after the used oil is extracted, new oil is supplied.

[0003]

However, the inner diameter, outer diameter, and length of the tube are restricted by the diameter and shape of the gauge port, and the piping resistance is reduced by restrictions on the inner diameter, outer diameter, and length of the tube. It becomes remarkably large. A similar situation exists for torque converter oil and the like.

Conventionally, the speed of extracting high-viscosity liquids, such as engine oil and torque converter oil, has been extremely slow, requiring a long time, resulting in poor work efficiency and high cost.

[0005] The present invention has been proposed in view of the above problems, and has as its object to provide an oil extracting apparatus capable of rapidly extracting a high-viscosity liquid such as engine oil.

[0006]

According to the present invention, there is provided an oil extracting device, wherein an extracting tube inserted into an oil gauge opening of an automobile is connected to an oil extracting hose, and the oil extracting hose is connected to a waste oil tank via a pipeline. Then, a pump for oil extraction is interposed in the pipeline, an air tube is communicated with the extraction tube, a check valve and a valve device are interposed in the air tube, and a motor for driving the pump is rotated and the valve device is rotated. Is provided with a control unit that opens and closes intermittently. The air tube communicates with the vicinity of the distal end of the extraction tube or the vicinity of the connection between the extraction tube and the oil extraction hose.

[0007] The term "oil" is used herein to include all high viscosity liquids such as engine oil and torque converter oil.

[0008]

[0009]

According to the present invention having the above-described structure, the control unit opens and closes the valve device by interposing the check tube and the valve device in the air tube and the air tube in communication with the extraction tube. The oil is sucked and extracted at the time of oil extracting operation, and at the same time, air is mixed into the extracted oil. The mixed air exists as bubbles in the oil. Due to the presence of the bubbles, the area where the inner wall surface of the tubular member in the oil extracting nozzle comes into contact with the oil is reduced. As a result, the resistance at the oil extraction nozzle (the inner wall surface of the tubular member in the nozzle) decreases, and the oil can be extracted quickly.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows an embodiment having a basic structure of the present invention, in which a sampling tube 1 is connected to an oil sampling hose 2, and the sampling tube 1 is connected to an oil pan 3 through an oil gauge opening 3 of an automobile. 4 has been inserted. The oil pan 4 contains oil L to be extracted. Here, the extraction tube 1 constitutes a tubular member in the oil extraction nozzle.

In parallel with the extraction tube 1, the tube 1
An air tube a, which is much thinner and through which air passes, is provided, and the air tube a merges at a location indicated by a symbol r near the distal end of the extraction tube 1. The air tube a is provided with a check valve b and a valve device c for adjusting the flow rate of air.

The oil extractor is generally designated by the reference numeral 2 in FIG.
0, inside which an oil drain hose 2
, A waste oil tank 24, a pump 26 for extracting oil, a motor 28 for driving the pump, a control unit 30 for opening and closing the motor 28 and the valve device c, and a start switch 32 Have been. Next, the operation of the embodiment shown in FIG. 1 will be described with reference to FIG. 2, FIG. 3, and FIG.

At the time of oil extraction, when the start switch 32 is pressed after the extraction tube 1 is inserted into the oil gauge opening 3 of the automobile, the control unit 30 operates.
The motor 28 is rotated, the pump 26 is driven, and at the same time, the valve device c is controlled to open, for example, every three seconds for one second.
When the pump 26 is driven in this manner, the extraction tube 1
Then, a vacuum is generated in the oil extraction hose 2, and the oil L is sucked and extracted from the oil pan 4 (FIG. 3). When the valve device c is closed, air does not flow into the extraction tube 1 via the air tube a and the junction r.

When the oil is sucked into the extraction tube 1 after being sucked for about 3 seconds, the piping resistance increases due to the viscosity of the oil and the small inner diameter of the extraction tube 1, and the speed of oil suction or oil extraction is remarkably increased. Will drop. When the valve device c is opened for about one second, the check valve b is also opened by the vacuum in the air tube a, and air flows into the extraction tube 1 through the air tube a and the junction r. The state shown in FIG.

As is apparent from FIG. 4, in this state, air fills a part of the extraction tube 1. And
Since the pipe resistance when sucking air is much smaller than that of oil, the speed at which oil passes through the extraction tube 1 and the oil extraction hose 2 increases. In other words,
The area where the oil L contacts the inner wall surface of the extraction tube 1 is reduced, and the extraction resistance is reduced.

Thereafter, the above operation is repeated, and the oil L in the oil pan 4 is extracted.

In this embodiment, if the check valve b is opened at a negative pressure of 500 to 600 mmHg, air is mixed only when the viscosity is high, and air is not mixed when extracting the low-viscosity oil. Efficient extraction is possible.

FIGS. 5 and 6 show another embodiment of the present invention. In this embodiment, the air tube a-1 is formed integrally with the extraction tube 1, the tip of the air tube a-1 is closed 10 and communicates with the extraction tube 1 through a hole 11. The other points are substantially the same as those of the above-described embodiment, and thus the description thereof will not be repeated. By doing so, the diameter of the tube can be reduced, and the tube can be smoothly inserted into the oil gauge opening.

FIG. 7 shows another embodiment of the present invention.
In this embodiment, the air tube a-2 communicates with the vicinity of the connection between the extraction tube 1 and the oil exchanger extraction hose 2. In this embodiment, the inner diameter of the extraction tube can be increased and the resistance can be reduced. Although there is no difference between the oil passing through the extraction tube 1 and the conventional case, the resistance in the oil changer extraction hose 2 is reduced.

[0021]

According to the present invention, the speed of extracting used oil is improved. In particular, the effect is remarkable at the beginning of the sampling operation and at a low temperature.

Further, as the extraction resistance is reduced, the load on the pump is greatly reduced.

[Brief description of the drawings]

FIG. 1 is a side view of one embodiment of the present invention.

FIG. 2 is a front view showing the overall configuration of the present invention.

FIG. 3 is a side view for explaining the operation of the embodiment of FIG. 1;

FIG. 4 is a side view for explaining the operation of the embodiment of FIG. 1;

FIG. 5 is a side view of a second embodiment of the present invention.

FIG. 6 is a view taken in the direction of the arrow X in FIG. 5;

FIG. 7 is a side view of a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Extraction tube 2 ... Oil extraction hose 3 ... Automotive oil gauge port 4 ... Oil pan a, a-1, a-2 ... Air tube b ... Check valve c ..Valve devices L ... oil

Claims (3)

(57) [Claims] 1. An extraction tube inserted into an oil gauge opening of an automobile is connected to an oil extraction hose, the oil extraction hose is connected to a waste oil tank via a pipe, and an oil extraction pump is connected to the pipe. A control unit is installed to connect the air tube to the extraction tube, interpose a check valve and valve device to the air tube, rotate the pump drive motor, and open and close the valve device intermittently. An oil extraction device characterized by the following. 2. The oil extraction device according to claim 1, wherein the air tube communicates with a vicinity of a distal end of the extraction tube. 3. The oil extraction device according to claim 1, wherein the air tube communicates with a vicinity of a connection between the extraction tube and the oil extraction hose.