JPH04117126U - oil level gauge structure - Google Patents

Abstract

(57) [Summary] (with amendments) [Purpose] To enable accurate oil level measurement and to prevent oil leakage to the atmosphere. [Structure] A plug 3 that is inserted into the filler tube 1 and firmly holds the gauge rod 2 and has an air escape hole 6 in the axial direction, and a cap 4 that is slidably supported on the gauge rod.
and a bellows body 5 which is installed between the cap and the plug and into which the air escape hole opens. [Effect] There is no sinking of the oil level in the filler tube.
Accurate oil level measurement is possible, and the bellows body prevents oil leakage.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention accurately measures the oil level in oil reservoirs such as the engine oil pan. This invention relates to an oil level gauge structure suitable for measuring oil level.

0002

[Conventional technology]

FIG. 6 shows the structure of an oil level gauge that has been commonly used in the past. Firachu The tube 23 is erected with one end thereof submerged in the oil reservoir 7. filler tube 2 A gauge rod 25 and a cap are attached to the plug 24 which is removably inserted into the opening of 3. 26 is fixed. As shown in Fig. 7, grasp the handle 27 of the gauge rod 25 and Insert the plug 24 into the filler tube 23 and attach the cap to the opening edge of the filler tube 23. 26. The oil level is measured when the cap 26 is in contact. This is done by comparing the oil adhering to the gauge rod 25 with the oil level display mark 28. .

0003 As shown in FIG. 6, when the plug 24 is inserted into the opening of the filler tube 23, oil Air is trapped between surface 29 and the lower surface of plug 24. Therefore, plug 24 When inserted further, the trapped air is compressed and the air pressure increases. Therefore, As shown in FIG. 7, the oil surface 29 inside the filler tube 23 is pressed, and the oil reservoir 7 There is a difference between the oil level 30 and the oil level 30. The gauge rod 25 is submerged in the oil inside the filler tube 23. Since the oil level is measured by soaking the oil in the oil level measurement is performed.

0004 Disclosed in Japanese Utility Model Application No. 62-74111 as a known technique that solves the above problems. The techniques to do this will be improved. The bulletin states that the empty space inside the filler tube when inserting the plug. Air vents are disclosed for venting air. Please note that the air hole is covered with a cap or plastic. Both air holes communicate with the atmosphere. Said air hole This prevents the air pressure inside the filler tube from increasing and prevents the oil level from sinking.

[0005]

[Problem that the idea aims to solve]

As mentioned above, oil level subsidence can be prevented by the technology disclosed in Japanese Utility Model Application Publication No. 62-74111. However, the following problems occur. In other words, while driving, a car Vibrate. Therefore, some of the oil enters the filler tube and reaches its open side. There are times when it gets complicated. Therefore, oil is discharged to the atmosphere from the air holes. This causes problems such as the surrounding area gets dirty with oil and oil is wasted. be.

[0006] As a known technology related to the technology of the present invention, which will be explained later, There is something disclosed in Publication No. 4. This technology is based on the lubricating oil inlet system in engines. The outer periphery of the lubricating oil injection tube (corresponding to the filler tube) Fit the bellows tube over the tube, fix its lower end to the filler tube, and oil the upper end. Place it in contact with the filler cap. When injecting lubricating oil, moisten the upper end of the bellows tube. It is to be locked to a locking tool located at an appropriate distance from the lubricant injection pipe. Lubricating oil Enables inlet and oil level detection means through one oil filler port, as well as lubrication The purpose is to improve oil lubrication performance. The relationship between this technology and this invention is The point is that a bellows tube is placed around the filachie, but the purpose and effect of both are different. They are different.

[0007] This invention solves the above problems and eliminates the oil when inserting the plug. There is no oil level sinking phenomenon, allowing accurate oil level measurements, and The purpose of the present invention is to provide an oil level gauge structure that does not leak oil.

[0008]

[Means to solve the problem]

In order to achieve the above objectives, the present invention is designed to be removably inserted into the filler tube. a plug that holds the gauge rod; a cap that is slidably supported on the gauge rod; A bellows body is installed between the bellows body and the filament, and the plug is provided with a bellows body and the filament. The oil level gauge structure consists of an air relief hole that opens on both sides. It is something.

[0009]

[Effect]

When you start inserting the plug to which the gauge rod is fixed into the filler tube, the filler The air inside the rat tube passes through the air relief hole formed in the plug to the bellows body. invade inside. The bellows body is installed between the plug and the cap, and the cap is arranged between the plug and the cap. Because the cap is slidably supported on the cage rod, air intrusion can cause the cap to move and prevent it from moving. The bellows body stretches accordingly. Therefore, the volume inside the bellows body increases and the filler tube absorb the air inside. As a result, the air pressure inside the filler tube does not increase and the oil level Subsidence is prevented. Furthermore, the bellows body prevents oil from leaking into the atmosphere.

0010

【Example】

Hereinafter, one embodiment of the present invention will be described based on the drawings. As shown in FIG. 1, the oil level gauge structure of this embodiment is mounted on the oil reservoir 7. The filler tube 1 to be installed upright, the plug 3 that holds the gauge rod 2, and the gauge rod 2 A slidably supported cap 4 is installed between the plug 3 and the cap 4. It is composed of a bellows body 5 and the like.

[0011] The filler tube 1 is a second hollow tube 1 with a small diameter whose lower end is submerged in the oil reservoir 7. 0 and a large-diameter first hollow tube 11 integrally connected to the upper side thereof. , the upper end of the first hollow tube 11 is open.

0012 The plug 3 is integrally formed above the small diameter portion 12 that fits into the second hollow tube 10. The large diameter portion 13 is inserted relatively roughly into the first hollow body. It is formed from a material with a suitable outer diameter.

[0013] The gauge rod 2 passes through the plug 3 in the axial direction and is fixed by a locking means 14 or the like. Ru. Note that an oil level display mark 9 is formed on the lower end side of the gauge rod 2, and an oil level display mark 9 is formed on the lower end side of the gauge rod 2. A handle 8 is formed on the handle 8 . The plug 3 has an air relief hole 6 along its axial direction. Formed through.

[0014] As described above, the cap 4 is slidably supported on the gauge rod 2, and the cap 4 is slidably supported on the gauge rod 2. The size is such that it comes into contact with and covers the opening edge 15 of the first hollow tube 11 of the tube 1. formed from.

[0015] The bellows body 5 is made of a rubber elastic structure, and is connected to the upper end side of the plug 3 and the key. It is constructed between the lower end side of the cap 4 and fixed between the two. In addition, filler tube 1. The relative dimensions between the plug 3, cap 4, and bellows body 5 are as follows: The lower end surface 16 of the small diameter portion 12 of the plug 3 is inserted into the filler tube. The position of the stepped portion 17 between the second hollow tube 10 and the first hollow tube 11 of the tube 1 has been reached. At this time, the cap 4 just hits the opening edge 15 of the first hollow tube 11 of the filler tube 1. It is formed so as to contact and envelop it. In addition, in this state, the bellows body 5 does not expand or contract. held in a free state. In addition, as shown in FIG. 1, the air relief hole 6 of the plug 3 opens into the inside of the bellows body.

[0016] Next, the operation of this embodiment will be explained. FIG. 2 shows that the plug 3 is inserted into the first hollow tube 11 of the filler tube 1, and the plug is just inserted into the first hollow tube 11 of the filler tube 1. This shows a state in which the lower end surface 16 of the lug 3 has reached the stepped portion 17. Said As shown above, in this state, the cap 4 lightly touches the opening edge 15 of the first hollow tube 11. and close the opening. Note that the large diameter portion 13 of the plug 3 and the first hollow tube 11 are different from each other. Since the plug 3 is formed with relatively rough fitting dimensions, the plug 3 can be inserted smoothly. FIG. 3 shows the insertion of the small diameter part 12 of the plug 3 into the second hollow tube 10 of the filler tube 1. Indicates the state in which it has started. The cap 4 abuts against the opening edge 15 of the second hollow tube 11. Therefore, when the plug 3 is inserted, the bellows body 5 is stretched and its internal volume is expanded. Ru. On the other hand, by inserting the small diameter portion 12 into the second hollow tube 10, the inside of the second hollow tube 10 is The air is compressed, but the air passes through the air relief hole 6 as shown by the arrow and is released into the bellows. Escape into body 5. Figure 4 shows the oil level measurement position with plug 3 fully inserted. The step 18 between the small diameter part 12 and the large diameter part 13 of the plug 3 is and shows a state in which the second hollow tubes 11 and 10 are in contact with the stepped portion 17 between them. The bellows body 5 is It is further extended than the state shown in FIG. 3, expanding the internal volume. The second of filler tube 3 The air in the hollow tube 10 continues to enter the bellows body 5 through the air escape hole 6. that's all Therefore, the air pressure inside the second hollow tube 10 does not increase. Therefore, filler tube The oil level 19 in the oil tank 1 does not sink and coincides with the oil level 20 in the oil reservoir 7. the result, The oil level is determined by the position of the oil around the oil level display mark 9 on the gauge rod 2. The oil level 20 of the oil reservoir 7 can be measured accurately. On the other hand, the air release hole 6 Even if the oil in the oil reservoir 7 spills out to the cap 4 side through the There is no possibility of oil leaking into the atmosphere.

[0017] FIG. 5 is a partially axial sectional view showing another embodiment of the present invention. As shown, When the lower end surface 16 of the small diameter part 12 of the plug 3 reaches the stepped part 17, the stepped part 17 of the plug 3 An air layer 21 is trapped between the portion 18 and the stepped portion 17. Therefore, plug 3 As the plug 3 is inserted, the air pressure in the air layer 21 increases, which may interfere with the insertion of the plug 3. Cheating. As mentioned above, the large diameter portion 13 of the plug 3 and the first hollow tube 11 are relatively rough. Since the air layer 21 is formed from a material that fits properly, an increase in air pressure in the air layer 21 is suppressed. death However, a relief hole 22 is formed to allow more complete insertion of the plug 3. That is, the escape hole 22 is formed along the radial direction of the small diameter portion 12 of the plug 3, and It is opened to the air layer 21 side and the air escape hole 6 side. When inserting plug 3 The air in the air layer 21 escapes into the bellows body 5 through the escape hole 22 and the air escape hole 6. Therefore, an increase in air pressure within the air layer 21 is completely prevented. In addition, this escape hole 2 2 may be communicated directly into the bellows body 5 without communicating with the air escape hole 6.

[0018] In the above embodiments, the dimensions, number, and shape of the air escape hole 6 and the escape hole 22 are etc. are not explained in detail, but there is no particular limitation, and the capacity of the filler tube 1 It can be determined experimentally and theoretically, taking into consideration factors such as product and insertion speed of the plug 3. Also, for a long time In consideration of the deformation of the bellows body 5 due to use, a bellows body with a spring may be used. stomach.

[0019]

[Effect of the idea]

According to the present invention, the following remarkable effects are achieved. (1) The air inside the filler tube is introduced into the bellows body through the air relief hole. This structure prevents air pressure from rising inside the filler tube and prevents the oil level from sinking. oil level measurement is performed accurately. (2) There are no openings that communicate with the atmosphere, so no oil leaks to the atmosphere. Therefore, there is no dirt in the surrounding area, and no oil is wasted. (3) The bellows body is installed between the plug and the cap, and the air escape hole is formed in the plug itself. The overall structure is compact, and the existing oil level gauge can be used easily. It can also be easily applied to structures.

[Brief explanation of drawings]

FIG. 1 is an axial sectional view showing the overall structure of an embodiment of the present invention.

FIG. 2 is a partial axial sectional view for explaining the operation of the embodiment.

FIG. 3 is a partial axial cross-sectional view for explaining the state at the beginning of insertion of the plug of the same embodiment.

FIG. 4 is an axial sectional view showing a state in which the plug of the same embodiment is completely inserted.

FIG. 5 is a partially axial sectional view showing another embodiment of the present invention.

FIG. 6 is an axial sectional view showing an outline of a conventional oil level gauge structure.

FIG. 7 is an axial sectional view for explaining the operation of a conventional oil level gauge structure.

[Explanation of symbols]

1 Filler tube 2 Gauge rod 3 Plug 4 Cap 5 Bellows body 6 Air relief hole 7 Oil reservoir 8 Handle 9 Oil level display mark 10 Second hollow tube 11 First hollow tube 12 Small diameter section 13 Large diameter part 14 Locking means 15 Opening edge 16 Lower end surface 17 Stepped part 18 Step part 19,20 Oil level 21 Air layer 22 Escape hole

Claims (1)

[Scope of utility model registration request] 1. A bellows body is installed between a plug that is removably inserted into a filler tube and holds a gauge rod and a cap that is slidably supported on the gauge rod, and a bellows body is provided on the plug. An oil level gauge structure characterized in that an air escape hole is provided that opens into the body and the filler tube side.