CN211820915U - Ventilation device - Google Patents

Abstract

The utility model provides an air breather adopts flexible change's semi-closed container to come the pressure and pressure increase in the absorption casing freely, and then can promote space application efficiency. A ventilation device for ventilating a housing for a component mounted on a vehicle, the ventilation device comprising: a breather pipe communicated to the housing; a connection pipe connected to the vent pipe; and a semi-closed container connected to the connecting pipe, the semi-closed container having a chamber located at a central portion and connected to the connecting pipe, and a bellows located at both end portions and being expandable and contractible, whereby the semi-closed container is expandable and contractible in association with pressure increase and decrease in the casing.

Description

Ventilation device

Technical Field

The present invention relates to a ventilation device (break device), and more particularly, to a ventilation device for ventilating a housing for a component mounted on a vehicle.

Background

As is well known, a vehicle is generally provided with components including a housing, such as an engine (engine), a transmission system (transmission system), a transfer case (transfer case), and a differential (differential), and the housing for these components is capable of being provided with an air-breather for ventilating the interior of the housing. The ventilator is attached to the housing and communicates the inside and outside of the housing via a hole for air suction (i.e., a breathing hole). As described above, when the temperature in the casing increases as the vehicle travels, the pressure of the gas in the casing increases due to the volume expansion. At this time, the gas whose pressure has risen in the housing can flow into the ventilation device, and flow to the outside of the housing via the breathing port of the ventilation device. On the other hand, when the temperature in the housing decreases, the pressure of the gas in the housing decreases due to volume contraction. At this time, the inside of the casing becomes a negative pressure, and the gas outside the casing is sucked into the ventilator through the breathing port and flows into the inside of the casing through the ventilator.

As the ventilation device, a small box body (or ventilation box) having a breathing port formed therein is generally provided separately on the outside of the housing, and the inside and the outside of the housing are communicated with each other. Such ventilators are also known as "self-contained ventilators". However, in order to secure a clearance (clearance) between other members mounted on the vehicle, the ventilator must be installed in an environment where the fluid such as water is not easily splashed, and therefore, this type of built-in ventilator has a problem of poor space utilization efficiency.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent laid-open publication No. 2002-364736

[ patent document 2] Japanese patent laid-open No. 2004-068848

[ patent document 3] Japanese patent laid-open publication No. 2013-108514

SUMMERY OF THE UTILITY MODEL

The utility model provides an air breather adopts flexible change's semi-closed container to come the pressure and pressure increase in the absorption casing freely, and then can promote space application efficiency.

The utility model provides a ventilation device for ventilate in the used casing of part to carrying on the vehicle, ventilation device includes: a breather pipe communicated to the housing; a connection pipe connected to the vent pipe; and a semi-closed container connected to the connecting pipe, the semi-closed container having a chamber located at a central portion and connected to the connecting pipe, and a bellows located at both end portions and being expandable and contractible, whereby the semi-closed container is expandable and contractible in association with pressure increase and decrease in the casing.

In an embodiment of the present invention, the semi-closed container is disposed in a mounting bracket tube mounted on the vehicle and adjacent to the housing.

In an embodiment of the present invention, a breathing port and a pressure reducing valve are disposed in an end portion of the bellows opposite to the central portion, the pressure reducing valve is configured to close the breathing port when the pressure in the casing is lower than the tolerance pressure, and the pressure in the casing exceeds the tolerance pressure and opens the breathing port.

In an embodiment of the invention, the component is at least one of an engine, a transmission system, a transfer case, and a differential.

In view of the above, in the ventilation device of the present invention, the ventilation pipe communicates with the housing, the connection pipe is connected to the ventilation pipe, and the semi-closed container is connected to the connection pipe, wherein the semi-closed container has the chamber at the central portion and the bellows at both end portions, which are capable of freely extending and contracting, and accordingly, the bellows is freely changed in accordance with the pressure increase and decrease in the housing. Thus, the breather device can absorb increased or decreased pressure in the case by the semi-closed container, and can be mounted without leaving a gap with the peripheral members around the case for the member mounted on the vehicle (e.g., differential). Therefore, the utility model discloses an air breather adopts flexible change semi-closed container to absorb the increase and reduction pressure in the casing freely, and then can promote space application efficiency.

In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic view of an air breather device according to an embodiment of the present invention and a housing for a vehicle-mounted component to which the air breather device is attached;

FIG. 2 is a schematic view of the breather device of FIG. 1 shown in a pressurized state;

FIG. 3 is a schematic view of the vent apparatus shown in FIG. 1 in a depressurized state;

FIG. 4 is an enlarged schematic view of one of the bellows of the vent shown in FIG. 2 in region A;

fig. 5 is an enlarged schematic view of another bellows of the vent shown in fig. 3 in region B.

Description of reference numerals:

50: a housing;

60: a component;

70: mounting a support pipe;

100: a breather device;

110: a breather pipe;

120: a connecting pipe;

130: a semi-closed container;

132: a chamber;

134a, 134 b: a bellows;

136a, 136 b: a channel;

138a, 138 b: a breathing port;

140a, 140 b: a pressure reducing valve;

142: a valve ball body;

144: a valve seat body;

A. b: an area;

c: a central portion;

e1, E2: two ends.

Detailed Description

Fig. 1 is a schematic view of a breather device according to an embodiment of the present invention and a housing for a component mounted on a vehicle to which the breather device is attached, fig. 2 is a schematic view of a state of the breather device shown in fig. 1 when pressurized, fig. 3 is a schematic view of a state of the breather device shown in fig. 1 when depressurized, fig. 4 is an enlarged schematic view of one of bellows of the breather device shown in fig. 2 in a region a, and fig. 5 is an enlarged schematic view of the other bellows of the breather device shown in fig. 3 in a region B. In the present embodiment, the ventilation device 100 is used for ventilating the inside of the housing 50 for the components mounted on the vehicle. Although not shown, the vehicle components may be enumerated as at least one of an engine, a transmission, a transfer case, and a differential, including a housing, disposed within the vehicle. However, the present invention is not limited to the use of the ventilator 100, and may be adjusted as desired. The overall configuration of the ventilator 100 in the present embodiment will be described below with reference to fig. 1 to 5.

Referring to fig. 1, in the present embodiment, the ventilation device 100 includes a ventilation pipe 110, a connection pipe 120, and a semi-closed container 130. The breather pipe 110 communicates to the housing 50, the coupling pipe 120 is coupled to the breather pipe 110, and the semi-hermetic container 130 is coupled to the coupling pipe 120. More specifically, the structure shown in fig. 1 is a set of a case 50 for a component 60 (such as a differential) mounted on a vehicle and other peripheral components. In this example, the vehicle is further mounted with a mount bracket tube (mount braketpipe) 70, and the mount bracket tube 70 has a hollow structure. Therefore, the breather device 100 of the present embodiment further arranges the semi-closed container 130 in the mounting bracket pipe 70 mounted on the vehicle and adjacent to the casing 50, extends outward through the connecting pipe 120, and communicates with the casing 50 through the breather pipe 110, thereby ventilating the casing 50. However, in other embodiments not shown, the breather 100 may be mounted around the housing 50 and coupled to the housing 50. As long as the ventilator 100 can ventilate the housing 50, the present invention does not limit the installation position of the ventilator 100, and it can be adjusted as required.

Please refer to fig. 1 to 5 for the specific structure of the ventilator 100. In the present embodiment, the semi-enclosed container 130 is a tube with a substantially elongated shape. The semi-closed container 130 has a chamber 132 located at the center portion C and connected to the connecting pipe 120, and bellows 134a, 134b located at both end portions E1, E2 and extendable and retractable. That is, the chamber 132 connected to the connecting pipe 120 is provided in the center portion C of the semi-closed container 130, and the bellows 134a, 134b which can expand and contract are provided in the both end portions E1, E2 of the semi-closed container 130, and accordingly, the expansion and contraction change freely in accordance with the pressure increase and decrease in the casing 50.

Further, when the pressure inside the housing 50 increases, the gas inside the housing 50 is discharged to the outside of the housing 50 via the breather 100. At this time, the gas inside the casing 50 flows into the chamber 132 located in the central portion C and the bellows 134a and 134b located at the both end portions E1 and E2 of the semi-closed container 130 via the breather pipe 110 and the connecting pipe 120, and further the bellows 134a and 134b are expanded, as shown in fig. 2.

When the pressure inside the housing 50 is reduced, the gas outside the housing 50 is sucked into the inside of the housing 50 via the breather 100. At this time, the gas in the chamber 132 in the central portion C of the semi-closed container 130 and the bellows 134a and 134b in the both end portions E1 and E2 flows into the inside of the casing 50 through the breather pipe 110 and the connecting pipe 120, and further contracts the bellows 134a and 134b, as shown in fig. 3.

In the present embodiment, the semi-closed container 130 means that the space inside thereof is not closed. Specifically, in the semi-closed container 130, passages 136a and 136b communicating to the outside, breathing ports 138a and 138b at the ends of the passages 136a and 136b, and pressure reducing valves 140a and 140b for opening and closing the breathing ports 138a and 138b are provided in the end portions of the bellows 134a and 134b opposite to the center portion C at the both end portions E1 and E2, respectively. The pressure reducing valves 140a and 140b close the breathing ports 138a and 138b when the pressure in the casing 50 is equal to or lower than the withstand pressure, and open the breathing ports 138a and 138b when the pressure in the casing 50 exceeds the withstand pressure.

Further, the pressure of the pressure reducing valves 140a, 140b is set to be slightly smaller than the withstand pressure. The withstand pressure refers to a pressure that can be withstood by a member such as an oil seal (oil seal) or the like in the housing 50. When the pressure in the housing 50 is equal to or lower than the withstand pressure, the pressure reducing valves 140a and 140b are maintained in the closed state. The closed state is a state in which the valve ball 142 of the pressure reducing valve 140a, 140b abuts against the valve seat body 144 to close the breathing ports 138a, 138b at the two end portions E1, E2 of the semi-closed container 130 (as shown in fig. 4 and 5). At this time, the semi-closed casing 130 is changed so as to be expandable and contractible in accordance with the increase and decrease in pressure in the casing 50 within a range of the withstand pressure or lower.

In contrast, when the pressure inside the housing 50 exceeds the withstand pressure, the pressure reducing valves 140a, 140b are turned into the open state. The open state is a state in which the valve ball 142 of the pressure reducing valve 140a, 140b moves along the passage 136a, 136b and separates from the valve seat body 144, thereby opening the breathing ports 138a, 138b at both end portions E1, E2 of the semi-closed container 130 (e.g., a state in which the valve ball 142 further moves to the right side of the drawing in the state shown in fig. 4 and 5 and opens the breathing ports 138a, 138 b). When the pressure in the casing 50 exceeds the withstand pressure in this way, the gas outside the ventilator 100 can enter the inside of the ventilator 100 through the breathing ports 138a and 138b, and further enter the inside of the casing 50 through the semi-closed container 130, the connection pipe 120, and the breather pipe 110 of the ventilator 100, thereby ventilating the casing 50.

As described above, the ventilation apparatus 100 can not only absorb gas in the casing 50 or exhaust gas to the casing 50 by the semi-closed container 130 being telescopically changed, but also prevent the entry of fluid such as water by closing the breathing ports 138a and 138b by the pressure reducing valves 140a and 140b in a normal state (i.e., under a withstand pressure). As described above, the breather device 100 does not need to be provided in an environment where a gap is not likely to be left between the periphery of the housing 50 for the member 60 (such as a differential) mounted on the vehicle and peripheral members, and is not limited to an environment where a fluid such as water is not likely to be splashed, and therefore the efficiency of space utilization of the breather device 100 is improved.

As described above, in the ventilation device of the present invention, the ventilation pipe communicates with the housing, the connection pipe is connected to the ventilation pipe, and the semi-closed container is connected to the connection pipe, wherein the semi-closed container has the chamber at the central portion and the bellows at both end portions, which are capable of freely extending and contracting, and thus freely changes in accordance with the pressure increase and decrease in the housing. The ventilation device is also provided with a breathing port and a pressure reducing valve, wherein the pressure reducing valve closes the breathing port when the pressure in the shell is lower than the tolerance pressure and opens the breathing port when the pressure in the shell exceeds the tolerance pressure. As described above, the breather device can absorb the increased or decreased pressure in the case by the semi-closed container, can be mounted without leaving a gap between the periphery of the case for the member mounted on the vehicle (e.g., differential) and the peripheral member, and is not limited to the environment where the breather device is not easily splashed with fluid such as water. Therefore, the utility model discloses an air breather adopts flexible change semi-closed container to absorb the increase and reduction pressure in the casing freely, and then can promote space application efficiency.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the embodiments of the present invention, and the essence of the corresponding technical solutions is not disclosed.

Claims (4)

1. A ventilation device for ventilating a housing for a component mounted on a vehicle, the ventilation device comprising:

a breather pipe communicated to the housing;

a connection pipe connected to the vent pipe; and

a semi-closed container connected to the connection pipe,

the semi-closed container has a chamber located at a central portion and connected to the connecting pipe, and a bellows located at both end portions and being expandable and contractible, whereby the semi-closed container is expandable and contractible in accordance with an increase or decrease in pressure in the casing.

2. The breather device of claim 1, wherein the semi-enclosed container is disposed within a mounting bracket tube mounted to the vehicle and adjacent to the housing.

3. The ventilator of claim 1, wherein an end of the bellows opposite the central portion is provided with a breathing port and a pressure relief valve therein, the pressure relief valve closing the breathing port when the pressure within the housing is below a withstand pressure and opening the breathing port when the pressure within the housing exceeds the withstand pressure.

4. The breather device of any of claims 1-3, wherein the component is at least one of an engine, a transmission, a transfer case, and a differential.

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