JPH02310425A - Oil level gage - Google Patents

Abstract

PURPOSE:To surely measure an oil level by constituting an oil level gage with a transparent hollow tube. CONSTITUTION:The oil level gage 10 consists of the hollow glass tube 12, rubber-made mounting component 14 and rubber plug 16 capable of closing the upper end of the hollow tube 12. A scale indicating the upper limit and lower limit positions of the oil level is provided on the hollow tube 12. By means of manufacturing the hollow tube 12 with the transparent material such as the above, the oil level can be surely measured.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an oil level gauge for automatic transmissions, engines, etc.

(b) Conventional technology As a conventional oil level gauge, for example,
There is one as shown in Japanese Patent No.-132217. That is, a mark indicating the maximum oil level and a mark indicating the minimum oil level are provided at the bottom of a strip-like long and thin plate that reaches the oil level. At the time of measurement, pull out the oil level gauge and check the state of oil adhesion.If oil is adhering between both marks, it means that the required amount of oil has been secured.

(c) Problem B that the invention attempts to solve However, the conventional oil level gauge as described above does not have the following problems:
There is a problem in that it may be difficult to check the oil level. That is, when the oil level gauge is pulled out, if the part with oil on it comes into contact with another part and the oil on it is wiped off, the oil level cannot be checked. Conversely, if oil splashed from a rotating member of a transmission, for example, adheres to an oil level gauge, it becomes difficult to distinguish it from the oil-adhered portion of the original oil surface.

Furthermore, if the oil is clean, very pale and transparent, it will be difficult to confirm the attached oil. The present invention aims to solve these problems.

(d) Means for Solving the Problems The present invention solves the above problems by constructing an oil level gauge using a transparent hollow tube. That is,
The present invention is directed to an oil level gauge that detects the oil level by immersing it in oil.
), and is characterized in that at least a portion of the hollow tube that requires visual recognition for oil level measurement is made of a transparent material. Note that the symbols in parentheses indicate corresponding members in the embodiments described later.

(E) The hollow tube is closed with a stopper except when measuring the working oil level to prevent oil from leaking to the outside. When measuring the oil level, first remove the stopper and bring the inside of the hollow tube to atmospheric pressure. This will fill the hollow tube with oil to a level that corresponds to the oil level. Next, the upper part of the hollow tube is closed with a stopper or a finger, and the hollow tube is taken out. Since the space above the oil in the hollow tube is sealed, the oil contained in the hollow tube does not leak out and is maintained as it is. The oil level can be determined by checking the oil level inside the hollow tube with the hollow tube pulled out in this manner.

(f) Example A first example is shown in FIGS. 1 to 3. oil level gauge 1
0 is composed of a hollow tube 12 made of glass, a mounting member 14 made of rubber fixed to the middle part of the tube in the axial direction, and a stopper 16 made of rubber that can close the upper end of the hollow tube 12. ing. The stopper 16 can be attached to and removed from the upper end of the hollow tube 12, and when attached to the upper end of the hollow tube 12, it can be hermetically sealed. The hollow tube 12 is provided with a scale indicating the upper and lower limit positions of the oil level.

FIG. 2 shows a state in which the oil level gauge 10 is attached to a transmission. That is, the oil level gauge 10 is attached by fitting the small diameter portion of the attachment member 14 into the tube 2o fixed to the casing 18 of the transmission. Normal operation is performed in this state. tube 2
Since the opening of the casing 18 is closed by the mounting member 14, and the opening at the upper end of the hollow tube 12 is closed by the stopper 16, the oil 22 inside the casing 18 will not leak to the outside.

When measuring the oil level, the plug 16 is removed once in the state shown in FIG. Hollow tube 12 due to stiffness
The inside of the is also at atmospheric pressure. Next, the stopper 16 is reattached and the upper end of the hollow tube 12 is sealed. In this state, the entire oil level gauge 10 is pulled out. Since the inside of the hollow tube 12 is in a sealed state, even if the oil level gauge 10 is removed, the oil inside the hollow tube 12 will not flow out.

Therefore, as shown in FIG. 3, even after the oil in the hollow tube 12 is extracted, it is maintained in the same state as when it was immersed in the oil 22. This allows you to check the oil level. Hollow tube 1 when removing oil level gauge 10
Even if the hollow tube 2 comes into contact with other members, or even if the scattered oil adheres to the outer periphery of the hollow tube 12, measurement of the oil level will not become inaccurate or difficult. Further, even if the oil 22 is nearly transparent, it is easy to observe the liquid level of the oil 22 inside the hollow tube 12.

In the above embodiment, the hollow tube 12 is made of glass and is entirely transparent, but only a portion necessary for observation may be made of a transparent material. That is, as shown in FIG. 4 or FIG. 5, the hollow tube 12 may be configured to include, for example, an opaque material portion 12a made of metal and a transparent material portion 12b such as glass.

Further, in the above embodiment, the plug 16 is made of rubber, but as shown in FIG. 6, a hinged lid 16b having a gasket 16a on the inside may be fixed by a hook 16c. , and as shown in Figure 7,
A hook 16 is integrated with a lid 16b having a gasket 16a.
c may also be configured. Further, as shown in FIG. 8, a lid 16b having a gasket 16a is provided on its inner diameter, and a female thread 16c is provided on the upper end of the hollow tube 12.
It can also be fixed by screwing into 2c.

(g) As described in detail, according to the present invention, the oil level gauge is constructed of a hollow tube that is transparent or has a transparent part, so that when the oil level gauge is removed, the oil is wiped away. This prevents oil from being removed or oil unrelated to the oil level from adhering to it, making it possible to reliably measure the oil level. Furthermore, even if the oil is highly transparent, it can be easily recognized visually.

[Brief explanation of the drawing]

FIG. 1 shows an oil level gauge according to an embodiment of the present invention, and FIG. 2 shows the oil level gauge shown in FIG. 1 installed in a transmission. FIG. 3 shows the oil level gauge taken out to check the oil level. Figure 4 shows a hollow tube with a transparent part in part, Figure 5 shows another hollow tube with a transparent part in part, and Figures 6.7 and 8 show different types of plugs. FIG. lO...Oil level gauge, 12...Hollow tube, 1
4...Mounting member, 16...Plug. Patent Applicant Japan Automatic Transmission Co., Ltd. Agent Patent Attorney Toshiyuki Miyauchi Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] An oil level gauge that detects oil level by immersing it in oil, comprising: an elongated hollow tube; and a stopper whose upper end can be closed; An oil level gauge characterized in that the parts that need to be visually checked for measurement are made of transparent material.