JPH071561Y2 - Air breather device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an air breather device, and more particularly to an air breather for use in engines, tons transmissions, torque converters, etc., in which a spiral plate-shaped mist separator is provided. Regarding

[Prior art]

In engines, tons missions and torque converters,
An air breather is provided for communicating the interior space of the housing with the atmosphere, and a filter for trapping oil mist is usually incorporated in the air breather. If oil mist adheres to the filter, the function as an air breather will be impaired and the function as an air breather will be impaired.For example, when the internal pressure rises due to temperature rise after starting the engine etc. There is a problem that the adhered oil is scattered outside.

Therefore, it is known that a mist separator that traps oil mist is incorporated in the air introduction part of the air breather containing the oil mist.

For example, Japanese Utility Model Application Laid-Open No. 61-157749 discloses that an air breather is provided with a partition plate for receiving a flow of air containing oil mist at the introduction portion of air containing oil mist. Japanese Patent Laid-Open Publication No. 2003-242242 describes that an air breather is provided with a recess at the introduction portion of air containing oil mist so as to bypass the flow of air containing oil mist.

In addition to the above, as shown in FIG. 3, a mist separator 101 made of a bottomed cylindrical body having a large number of small holes is provided on the inner surface of the housing 100, and oil mist is contained in the air breather 102 from the inside of the mist separator 101. For introducing air, or as shown in FIG. 4, a cylindrical body 103 is provided on the outside of the introducing pipe 102a of the air breather 102, and the cylindrical body 103 and the introducing pipe 102a form a double tubular mist separator. Widely used are those having a mist separator made of a baffle plate 104 on the inner surface side of the housing 100 as shown in FIG.

[Problems to be solved by the device]

Generally, among the mist separators of the conventional air breather, the one in which the member is attached to the housing side has a problem that the structure of the housing becomes complicated, the assembly of the mist separator is troublesome, and the manufacturing cost becomes expensive. is there. On the other hand, although the mist separator shown in FIG. 4 can be provided with almost no influence on the housing, there is a problem that the structure of the mist separator becomes complicated, expensive and large in size.

In addition, it is difficult to additionally attach the mist separator of the conventional air breather to the existing air breather.

An object of the present invention is to provide an air breather device having a mist separator that can be easily implemented with a simple structure, is excellent in oil mist separation performance and pulsation pressure damping, and can be additionally attached to an existing air breather. Is.

[Means for Solving the Problems]

The air breather device according to the present invention is a spiral mist in which one end of a tubular body is connected to an introduction portion for introducing air containing oil mist of the air breather, and a plate-like body is spirally twisted in the tubular body. The separator is attached to form two spiral air passages in the tubular body, and the air containing oil mist is introduced from the other end of the tubular body. The mounting portion has the same shape as the mounting portion for mounting the introduction portion of the air breather to one end portion of the tubular body.

[Action]

In the air breather device according to the present invention, the air containing the oil mist is introduced into the tubular body from the other end of the tubular body, and two spiral-shaped mist separators formed in the tubular body are formed. It flows to the air breather through the air passage.

The two spiral air passages formed by the spiral mist separator and the tubular body are longer than the length of the tubular body, and the mist separator contains oil mist. Since the surface area in contact with air is large and the two air passages are formed in a spiral shape, the oil mist effectively adheres to the surface of the mist separator and the inner peripheral surface of the cylindrical body.

In addition, since the two air passages inside the tubular body are spiral and long, there is an appropriate passage resistance, so the pulsating pressure of the air containing oil mist is appropriately attenuated, and the air breather The peak value of the pulsating pressure acting on the inside decreases.

In addition, at the other end of the tubular body, a mounting part with the same shape as the mounting part for mounting the air breather introduction part at one end of the tubular body was formed.Therefore, remove the existing air breather and install the mist separator in its mounting hole. Since the other end of the cylindrical body having the same can be connected and the removed air breather can be connected to one end of the cylindrical body, it can be easily applied to an existing air breather.

[Effect of device]

According to the air breather device of the present invention,
As described in detail in the section of (1), it has a simple structure mainly composed of a tubular body and a spiral mist separator incorporated therein, and two spirals are provided inside the tubular body by the spiral mist separator. Since the air passage is formed in a uniform shape, the oil mist can be effectively adhered to the mist separator and the cylindrical body to effectively separate the oil mist, and the pulsating pressure of the air containing the oil mist can be attenuated. Moreover, since the mounting portion having the same shape as the mounting portion for mounting the introduction portion of the air breather to the one end portion of the tubular body is formed at the other end portion of the tubular body, it can be easily applied to the existing air breather.

〔Example〕

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

The present embodiment is an embodiment in which the present invention is applied to an air breather device provided in a transmission of a vehicle.

As shown in FIG. 1, an air breather device AB is a mist separator which is connected to an air through hole 2 of a housing 1 of a transmission and introduces air containing oil mist from the inside of the housing 1 to remove most of the oil mist. Department
10, a connection sleeve 20 connected to the upper end of the mist separator unit 10, and an oil mist in the air that flows in from the mist separator unit 10 that is connected to the upper portion of the connection sleeve 20 and traps only air to the atmosphere. Air Breather 30
It consists of and.

Explaining the mist separator section 10, the mist separator section 10 is composed of a metal pipe material 11 and a spiral mist separator 12 mounted inside the pipe material 11.
A taper screw is formed on the outer peripheral portion of the mounting portion 11a at the lower end of the pipe material 11, and the mounting material 11a is screwed into the taper screw hole 2a in the upper part of the air passage hole 2 to screw the pipe material 11 into the housing 1. It is fixed. A mounting portion 11b similar to the mounting portion 11a is also formed on the upper end portion of the pipe material 11.
The pipe material 11 and the connection sleeve 20 are fixed to each other by internally fitting and screwing b into the taper screw hole 20a in the lower portion of the connection sleeve 20.

The mist separator 12 is formed by spirally twisting an elongated metal thin plate 12a as shown in FIG. 2, and after press-fitting the thin metal plate 12a into the pipe material 11, the notch 12b at the upper end is expanded. It is fixed in the pipe material 11 by being tightened.

Therefore, two spiral air passages 13 are formed in the pipe material 11 via the mist separator 12 that is spirally twisted.

The mist separator 12 can be formed of a thin metal plate such as a steel plate or a brass plate that is easily plastically worked, but may be formed by twisting a synthetic resin thin plate in a heat-softened state in a spiral shape. In this case, the mist separator 12 can be fixed to the pipe material 11 by one or a plurality of pin members penetrating the pipe material 11 and the mist separator 12 in the direction orthogonal to the axis.

Metal thin plate 12a of the material forming the mist separator 12
As shown in FIG. 2, one side in the longitudinal direction formed by connecting a plurality of arcs 12c of the same shape in the same direction in series with a plurality of arcs of the same shape facing in the opposite direction and out of phase with the arc 12c. Using a slender thin metal plate 12a having one side in the longitudinal direction formed by connecting circular arcs 12c in series, the mist separator 1
Almost no gap is generated between the outer peripheral portion of 2 and the inner periphery of the pipe material 11.

A taper screw hole 20b having the same shape as the taper screw hole 2a is formed on the upper portion of the connection sleeve 20.
The attachment portion 31a of the air blazer 30 is internally fitted and screwed.

The air breather 30 will be described. A taper screw is formed on the outer peripheral portion of the tapered tubular mounting portion 31a at the lower end of the hollow holding member 31.
The air breather 30 is fixed to the connection sleeve 20 by being internally fitted and screwed into 0b. A large number of vent holes 31c are formed on the outer peripheral wall of the main body portion 31b of the holding member 31, and the oil receiving member 32 surrounding the main body portion 31b is annularly fixed to the lower end of the main body portion 31b in the inner peripheral portion in an oiltight manner. It is composed of a bottom wall 32a and an outer peripheral habit 32b that rises in a cylindrical shape upward from the outer peripheral portion of the annular bottom portion 32a.

The cover member 32 is composed of an upper wall 33a and an outer peripheral wall 33b that hangs in a cylindrical shape from the outer peripheral portion of the upper wall 33a. The central portion of the upper wall 33a is fixed to the upper end portion of the holding member 31 with a thumbscrew 34, an annular ventilation path 35 is formed between the outer peripheral wall 33a and the outer peripheral wall 32b, and the upper wall 33a and the outer peripheral wall 32b. A predetermined gap 36 is provided between the upper ends of the.

Reference numeral 37 is a filter that is detachably attached.

The operation of the air breather device AB will be described.

Oil mist is generated in the air in the space inside the housing 1 of the tongue transmission, and pulsating pressure is also generated in the air.

When the air containing the oil mist flows into the pipe material 11 from the air passage 2 and flows to the air breather 30, the oil mist effectively adheres to the surface of the mist separator 12 and the inner peripheral surface of the pipe material 11. To do. That is, since the spiral air passage 13 in the pipe material 11 is long and spiral compared to the length of the pipe material 11, and the surface area of the mist separator 12 is large,
Oil mist is the surface of mist separator 12 and pipe material 11
The probability of contact with the inner circumferential surface of the oil mist is high, and the adhesion of oil mist is promoted. Moreover, since the spiral air passage 13 has an appropriate passage resistance, the flow of air containing oil mist is attenuated, so that the attachment of oil mist is promoted.

In addition, when the pulsating pressure is generated in the air containing the oil mist, the pulsating pressure is attenuated by the damping action of the spiral air passage 13, so that the air containing the oil mist becomes the air breather 30.
It will not flow into the filter 37
Even when a large amount of oil adheres to the filter, a large amount of oil adhered to the filter 37 will not be ejected to the outside.

The air from which most of the oil mist is removed while flowing through the spiral air passage 13 passes through the connection sleeve 20 and the holding member 31.
Of the filter 3
7, discharged through the gap 36 and the annular ventilation passage 35 to the outside.
The oil mist is also removed by the filter 37, and the oil mist collects inside the oil receiving member 32, and when it reaches a certain level, it flows into the inside of the holding member 31 from the ventilation hole 31c and returns to the inside of the housing 1.

As described above, the pipe material 11 and the mist separator 12
By providing the mist separator section 10 having a simple structure consisting of, the oil mist can be effectively removed and the pulsating pressure of the air containing the oil mist can be attenuated. In addition, since the taper screw hole 2a of the housing 1 and the taper screw hole 20b of the connection sleeve 20 are formed in the same shape, it can be easily applied to the existing air breather 30.

It should be noted that a large number of projections and depressions may be formed on the surface of the mist separator 12 to further promote the attachment of the oil mist. The lead angle of the spiral of the mist separator 12 is a pipe material
It shall be set appropriately in relation to the length and diameter of 11.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an air breather device according to an embodiment of the present invention, FIG. 2 is a front view of a thin metal plate material forming a mist separator of the device, and FIGS. 1 is a schematic diagram corresponding to FIG. 1 of an air breather. 10 …… Mist separator part, 11 …… Pipe material, 12 …… Mist separator, 20 …… Connection sleeve, 30 …… Air breather, AB …… Air breather device.

Claims (1)

[Scope of utility model registration request] 1. A spiral mist separator, which is formed by connecting one end of a cylindrical body to an introduction part for introducing air containing oil mist of an air breather, and spirally twisting a plate-shaped body in the cylindrical body. Then, two spiral air passages are formed in the tubular body, and the air containing oil mist is introduced from the other end of the tubular body. An air breather device, characterized in that a mounting portion having the same shape as a mounting portion for mounting an air breather introduction portion to one end of a tubular body is formed.