JP2548014Y2 - Air breather structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an air breather.

[0002]

2. Description of the Related Art For example, since a wet clutch has a hermetically sealed structure, when the internal temperature becomes high, the internal pressure becomes higher than the atmospheric pressure, and there is a problem that oil in a housing easily leaks out. In order to make the internal pressure of the clutch housing equal to the atmospheric pressure, an air breather 23 is attached to the upper part of the clutch housing (not shown) via a body 22 fixed to a breather mounting plate 21 as shown in FIG. The air in the clutch housing is taken into the air chamber 22b formed in the body 22 through each air passage 22a of the body 22, and is sucked from the air chamber 22b into the air breather 23 and discharged to the atmosphere.

[0003]

However, the oil flowing into the air chamber 22b of the conventional air breather and the body 22 together with the air is hard to be separated from the air, and the air suction port 23a of the air breather 23 is connected to the air of the body 22. Due to the structure opened to the chamber 22b, the oil is sucked into the air breather 23 together with the air, blows out to the atmosphere and is discharged, and as a result, there is a problem that the oil in the housing runs short. .

The present invention has been made in view of the above points, and satisfactorily separates the air flowing into the air chamber of the body mounted on the housing and the oil flowing with the air so that only the air is sucked into the breather. It is an object of the present invention to provide an air breather having such a structure.

[0005]

According to the present invention, in order to achieve the above object, an air chamber for taking in air in the housing is provided at an upper portion of the housing, and the air and the air are provided in the air chamber. An air breather is mounted via a body that separates the oil to be taken in, and the air chamber of the body, in which only the air in the housing is sucked into the air breather, directly takes in the air in the housing, together with the air and the air. A first air chamber for separating oil taken into the housing and dropping the oil into the housing; a second air chamber for taking in the air separated by the first air chamber and further separating the oil; and a second air chamber for separating the oil. A structure is formed by three air chambers including a third air chamber for taking in air and sucking the air into the air breather.

[0006]

The air taken into the first air chamber and the oil taken into the first air chamber together with the air are separated from the air in the first air chamber, and most of the separated oil drops into the housing. Then, air is taken into the second air chamber. In the second air chamber, air and oil are further separated, and only air flows into the third air chamber. Then, the air in the third air chamber is sucked into the air breather and discharged to the atmosphere. This prevents oil from blowing out from the air breather.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. In FIG. 1, a breather mounting plate 1 has a hole 1a formed substantially at the center, and bodies 2, 3 are mounted on the plate 1 on both inner and outer surfaces with the hole 1a interposed therebetween. A plurality of bolt holes 1b are drilled in the circumferential direction at the periphery of the hole 1a of the plate 1. The body 2 has a hole 2a in the center.
Is formed in a cylindrical shape, a small hole 2b communicating with the hole 2a is formed in the upper portion of the side wall in the radial direction of the hole 2a, and a flange 2c is formed at an open end of the hole 2a.
A plurality of bolt holes 2d are formed in the flange in the circumferential direction corresponding to the bolt holes 1b of the plate 1 in the flange. A seal cap 4 is fitted to the lower opening end of the hole 2a of the body 2 in a liquid-tight manner, and a small hole 4a is formed in the center of the seal cap 4.

The body 3 has a cylindrical shape in which a hole 3a having the same diameter as the hole 2a of the body 2 and a hole 3b having a smaller diameter than the hole 3a are formed concentrically at the center, and the lower part is formed from the lower end. A flange 3c is formed at the same distance as the plate thickness of the plate 2, and each of the bolt holes 1 of the plate 1 is formed in the flange 3c.
A plurality of screw holes 3d are formed in the circumferential direction corresponding to b. A seal cap 5 is fitted to the opening end of the hole 3a of the body 3 in a liquid-tight manner, and a small hole 5a is formed in the center of the seal cap 5.

The lower end of the body 3 is fitted into the hole 1a of the plate 1 from the outside in a liquid-tight manner, and the body 2 is formed with the hole 2a from the inside of the plate 1 aligned with the hole 1a. The body 3, the seal plate 6, the plate 1, and the body 3 are integrally and liquid-tightly fixed by bolts 7 with the seal plate 6 interposed therebetween. This seal plate 6
A small hole 6a is formed in a position opposite to the small hole 2b formed in the side wall of the body 2.

A first air chamber 10 is provided between the seal cap 4 and the seal plate 6 of the body 2, and a second air chamber 11 is provided between the seal plate 6 and the seal cap 5.
A third air chamber 12 is formed in the hole 3 a of the body 3 by the seal cap 6. That is, in the hole 2a of the body 2 and the hole 3a of the body 3, three air chambers 10 to 12 are formed vertically by the seal cap 4, the seal plate 6, and the seal cap 5. The air inlet 15a of the air breather 15 is fitted in the hole 3b of the body 3 in a liquid-tight manner.

By providing the seal caps 4 and 5 in the holes 2a and 3a of the bodies 2 and 3, the first and third air chambers can be easily formed. The plate 1 is mounted by fitting the inner body 2 into a hole 20 a provided in an upper portion of the housing 20, and is fixed in a liquid-tight manner by bolts 16. The plate 1 is mounted on the housing 20 so that a line H indicated by a two-dot chain line is horizontal. Therefore, FIG. 1 is drawn in a state where it is raised from an actual state of attachment to the housing 20.

In this state, the inside of the housing 20 and the first air chamber are defined by the small holes 4a of the seal cap 4, and the first air chamber 10 and the second air chamber 11 are defined by the small holes 6a of the seal plate 6, The air chamber 11 and the third air chamber 12 communicate with each other through small holes 5a of the seal cap 5. Further, the first air chamber 10 is communicated with the housing 20 by a small hole 2b in the side wall of the body 2, and this small hole 2b is opened downward to be a hole for draining oil. Therefore,
The hole 6 a of the seal plate 6 is located above the first air chamber 10.

The operation will be described below. The air in the housing 20 flows into the first air chamber 10 from the small hole 4 a of the seal cap 4 of the body 2. At this time, oil flows into the first air chamber 10 together with the air. The first air chamber 10 is provided with an oil vent hole 2b at the lower part and an air vent small hole 6a at the upper part.
It is difficult for the oil in 0 to enter the second air chamber 11. As a result, in the first air chamber 10, air and oil are well separated, most of the oil drops into the housing 20 through the small holes 2b, and the air flows from the small holes 6a of the seal plate 6 to the second holes. It flows into the air chamber 11.

The air that has flowed into the second air chamber 11 flows into the third air chamber 12 through the small holes 5a of the seal cap 5. Most of the oil taken in with the air in the first air chamber 10 is separated from the air, and the first air chamber 1
Even a small amount of oil that has entered the second air chamber 11 without being separated from air at 0 is almost completely separated from air in the second air chamber 11.

As a result, only the air in the housing 20 flows into the third air chamber 12, and no oil enters. Then, the air in the third air chamber 12 is sucked through the suction port 15a of the air breather 15 and discharged to the atmosphere. Thereby, the internal pressure of the housing 20 is adjusted to the same pressure as the atmosphere without the oil in the housing 20 being sucked into the air breather 15 and being blown out to the atmosphere.

[0016]

As described above, according to the present invention, an air chamber for taking in the air in the housing is provided at the upper part of the housing, and the air and the oil taken in with the air are separated in the air chamber. An air breather is mounted through the body to be mounted, and the air chamber of the body, in which only the air in the housing is sucked into the air breather, directly takes in the air in the housing and separates the air and the oil taken in with the air. A first air chamber for allowing oil to drip into the housing, a second air chamber for taking in the air separated by the first air chamber and further separating the oil, and an air breather for taking in air from the second air chamber. Oil is sucked into the air breather by having a structure formed by three air chambers with the third air chamber sucked into the air breather Be blown into the atmosphere is prevented with air Te, As a result, an excellent effect such it is possible to enhance the function of the air breather it is possible to prevent the waste oil in the housing.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an air breather to which the present invention is applied.

FIG. 2 is a sectional view of a conventional air breather.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Breather mounting plate 2, 3 Body 4, 5 Seal cap 6 Seal plate 10-12 Air chamber 15 Air breather 20 Housing

Claims (1)

(57) [Scope of request for utility model registration] An air breather is provided at an upper portion of a housing through an air chamber for taking in air in the housing, and an air breather is mounted in the air chamber through a body for separating the air and oil taken in with the air. The air chamber of the body, in which only air in the housing is sucked into the air breather, directly takes in the air in the housing, separates the air and the oil taken in with the air, and drops the oil into the housing. An air chamber, a second air chamber that takes in the air separated by the first air chamber and further separates oil, and a third air chamber that takes in the air of the second air chamber and sucks the air into the air breather. An air breather structure formed by an air chamber.