JP2000203695A - Preset auto-nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly insert and remove a nozzle into a bung hole without scattering of oil and to properly feed the oil. SOLUTION: A preset auto-nozzle 10 is provided with an oil feeding nozzle 11 inserted into a bung hole 101 of a container 100, a piston for driving forward and backward the oil feeding nozzle 11 to the bung hole 101 and a liq. face sensor 13 for detecting the liq. face of the oil in the container 100 and after the oil is fed into the container 100 from the oil feeding nozzle 11, the oil feeding nozzle is pulled out from the container 100. A cylinder 15 constituting an oil feeding path 14 for feeding the oil into the oil feeding nozzle 11 is provided and the piston 12 is freely slidably fitted in the cylinder 15. In addition, a vacuum means for negatively sucking the oil feeding path 14 is provided. The liq. face sensor 13 detects the liq. face of the oil based on change in back pressure when air is sent by pressure into the oil in the container 100.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a preset auto nozzle for injecting oil into a container such as a so-called transaxle, transmission or differential casing.

[0002]

2. Description of the Related Art When injecting oil into a container such as a transaxle, a transmission or a differential casing in a passenger car or the like, an injection nozzle 1 as shown in FIG. 3 has been used, for example. An oil supply pipe 2 is connected to the injection nozzle 1, and the injection nozzle 1 is supported by a chain 3 so as to move up and down.

[0003] The case 100 is provided with an inlet 101 which is provided at an angle to the horizontal as shown in the figure.
The injection nozzle 1 suspended by the chain 3 is inserted into the injection port 101 as shown. In this state, oil is injected from the injection nozzle 1, and after the injection is completed, the oil is pulled up by the chain 3.

[0004]

However, conventionally, when the injection nozzle 1 is pulled up by the chain 3 after oil injection, the oil may drop on the outer surface of the case 100 and adhere thereto. Further, it was substantially difficult to check whether or not an appropriate amount of oil was injected into the case 100 by using the actual thing. Further, oil may be scattered from a gap between the injection port 101 and the injection nozzle 1 of the case 100. Further, when the injection nozzle 1 is automatically pulled up when the injection is completed, the injection nozzle 1 may be caught by the injection port 101.

SUMMARY OF THE INVENTION In view of the foregoing, it is an object of the present invention to provide a preset auto nozzle capable of smoothly and properly injecting oil.

[0006]

A preset automatic nozzle according to the present invention comprises an oil injection nozzle inserted into an inlet of a container, a piston for driving the oil injection nozzle forward and backward with respect to the inlet, and an oil in the container. A liquid level sensor for detecting the liquid level of the oil, the oil injection nozzle injects oil into the container, detects a predetermined liquid amount with the liquid level sensor, and then withdraws from the container by the piston. It is characterized by having done. The preset auto nozzle of the present invention preferably includes a cylinder constituting an oil supply path for supplying oil to the oil injection nozzle, and a piston can be slidably fitted in the cylinder. Further, the preset automatic nozzle of the present invention is preferably provided with vacuum means for suctioning the oil supply path under a negative pressure. Still further, in the preset auto nozzle of the present invention, preferably, the liquid level sensor may be configured to detect a liquid level of the oil by a change in back pressure when air is fed into the oil in the container. .

According to the present invention, after a predetermined amount of oil is injected by the oil injection nozzle, the oil injection nozzle is pulled out of the container by the piston. in this case,
At the time of oil filling, the liquid level sensor preferably detects the liquid level of the oil by a change in back pressure when air is pumped into the oil in the container, so that the actual oil check can accurately grasp the oil filling amount. it can. Further, when extracting the nozzle after the oil is injected, the oil supply path for supplying the oil to the oil injection nozzle is suctioned at a negative pressure, whereby the scattering or adhesion of the oil can be reliably prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a preset auto nozzle according to the present invention will be described below with reference to the drawings, using the same reference numerals for members substantially the same as or corresponding to those of the conventional example. FIG. 1 shows a configuration example of a preset auto nozzle 10 in this embodiment. In this example, it is assumed that oil is injected into a container such as a transaxle, and a transaxle case 100 is provided with an injection port 101 which is provided to be inclined with respect to the horizontal as shown in FIG.

The preset auto nozzle 10 of the present invention
Is an oil injection nozzle 11 inserted into the injection port 101 of the case 100;
And a liquid level sensor 13 for detecting a liquid level of oil in the case 100. Further, a cylinder 15 constituting an oil supply path 14 for supplying oil to the oil injection nozzle 11 is provided.
The piston 12 is slidably fitted in the cylinder 15.

The oil injection nozzle 11 is provided with a plurality of (20 to 30) fine holes 11a having a diameter of about 1 mm, for example. Preferably, a liquid level sensor 13 protrudes from the center of the oil injection nozzle 11. The liquid level sensor 13 ejects air fed from the air supply pipe 16 at a predetermined pressure at a predetermined pressure, and detects a liquid level of the oil based on a change in back pressure when air is fed into the oil. ing. In this case, for example, a pressure gauge may be provided at an appropriate position on the air supply source side of the air supply pipe 16, and a change in the back pressure may be detected by the pressure gauge.

A gap of about 0.3 mm is set between the outer diameter of the oil injection nozzle 11 and the inner diameter of the injection port 101. Thus, the oil injection nozzle 11 and the injection port 101
The oil can be prevented from being scattered by reducing the gap.

The cylinder 15 has a double structure to constitute the oil supply passage 14 as described above.
2 is urged by a spring 17 to retract into the cylinder 15. When the piston 12 is retracted in this way, the oil injection nozzle 11 relatively projects (FIG. 1). Further, an air supply pipe 18 is connected to the cylinder 15, and air is supplied from the air supply pipe 18 into the cylinder 15 at a predetermined pressure. As shown in FIG. 2, the piston 12 can be pushed out of the cylinder 15 against the elasticity of the spring 17 by the air pressure from the air supply pipe 18.

Further, the preset automatic nozzle 10 of the present embodiment is provided with vacuum means for sucking the oil supply passage 14 under a negative pressure. In this embodiment, the vacuum means is constituted by connecting a vacuum suction pipe 19 connected to a vacuum source to the oil supply path 14, and the oil supply path 14 is negatively suctioned at an appropriate timing via the vacuum suction pipe 19. I do.

According to the present invention, when oil is injected into the case 100, the piston 12 is drawn into the cylinder 15 by the elastic force of the spring 17. Thereby, the oil injection nozzle 11 protrudes from the open end of the piston 12 as shown in FIG. In this state, the oil injection nozzle 11 is inserted into the injection port 101. In addition,
At this time, the preset auto nozzle 10 may be moved up and down near the inlet 101 by elevating means (not shown) that moves the preset auto nozzle 10 up and down by a pneumatically moving wire or the like.

The oil injection nozzle 11 is inserted exactly into the injection port 101 with a very small gap. At this time, the open end of the piston 12 is
1 and the oil injection nozzle 11 enters the case 100 from the inner wall. As described above, when the oil injection nozzle 11 is inserted and set, the liquid level sensor 13 is held at a fixed position inside the case 100.

When the oil is injected from the oil injection nozzle 11, the gap between the oil injection nozzle 11 and the injection port 101 is reduced to prevent the oil from scattering. Thus, the case 100 and its surroundings due to oil injection can be reliably prevented. When a certain amount of oil is injected, the tip of the liquid level sensor 13 is immersed in the oil in the container 100 as shown in FIG. 1, and the back pressure of the liquid level sensor 13 changes. The change in the back pressure detects that the oil level has reached a predetermined position, so that the actual oil check can accurately grasp the oil injection amount.

After the oil is injected by the oil injection nozzle 11 as described above, the oil injection nozzle 11 is pulled out of the container 100 by the piston 12. That is, the air pressure from the air supply pipe 18 causes the piston 1
When the cylinder 2 is pushed out from the cylinder 15, the oil injection nozzle 11 is relatively retracted into the piston 12. In this case, the oil injection nozzle 11 is withdrawn straight from the injection port 101 in the vertical direction, so that the oil can be automatically and smoothly extracted without being caught by the case 100. In addition, when the oil injection nozzle 11 is pulled out, the oil supply path 14 is suctioned by the vacuum suction pipe 19 under a negative pressure.
It is possible to reliably prevent the oil from scattering or adhering.

In the above embodiment, an example in which oil is injected has been described. However, the present invention is applicable not only to oil but also to injection of other fluids. The effect can be obtained.

[0019]

As explained above, according to the present invention,
By preventing the scattering or adhesion of oil in this type of oil injection nozzle, the cleanliness of the surroundings is maintained, and the operation can be performed safely. In addition, there is an advantage that the oil injection amount can be accurately detected and an appropriate amount can be injected uniformly and stably, and the work efficiency can be improved by smoothly inserting and removing the nozzle. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state at the time of insertion in an embodiment of a preset auto nozzle of the present invention.

FIG. 2 is a cross-sectional view showing a state of withdrawal in a preset auto nozzle according to an embodiment of the present invention.

FIG. 3 is a diagram showing an example of a conventional oil injection nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Preset auto nozzle 11 Oil injection nozzle 12 Piston 13 Liquid level sensor 14 Oil supply path 15 Cylinder 16 Air supply pipe 17 Spring 18 Air supply pipe 19 Vacuum suction pipe

Claims (4)

[Claims] An oil injection nozzle inserted into an inlet of a container; a piston for driving the oil injection nozzle forward and backward with respect to the inlet; and a liquid level sensor for detecting a level of oil in the container. Wherein the oil injection nozzle injects oil into the container, detects a predetermined liquid amount with the liquid level sensor, and then withdraws from the container by the piston. nozzle. 2. The apparatus according to claim 1, further comprising a cylinder forming an oil supply path for supplying oil to the oil injection nozzle, wherein the piston is slidably fitted in the cylinder. Preset auto nozzle. 3. The preset automatic nozzle according to claim 2, further comprising vacuum means for suctioning the oil supply path under a negative pressure. 4. The liquid level sensor according to claim 1, wherein the liquid level sensor detects a liquid level of the oil by a change in back pressure when air is fed into the oil in the container. Preset auto nozzle described in.