JP7201390B2 - breather hose - Google Patents

Description

The present invention relates to a breather hose connected to a case mounted on a vehicle.

BACKGROUND ART In a vehicle such as an automobile, power from an engine is input to a transmission, and power changed by the transmission is transmitted to drive wheels via a differential gear or the like.

Oil (fluid) used for operation or lubrication of each part is sealed in the case that houses the transmission and the like. The temperature of the oil in the case changes depending on the running state of the vehicle, etc., and the pressure in the case changes along with the temperature change of the oil. Therefore, a breather hose is connected to the upper part of the case to enable breathing due to the differential pressure between the inside and outside of the case.

A portion near the tip of the breather hose is held, for example, by a clamp attached to the intake manifold of the engine. The connection position of the breather hose to the case differs depending on the transmission model, and the holding position of the breather hose with a clamp differs depending on the engine model. Specially designed according to the combination with the transmission.

JP-A-2000-266166

As the number of combinations of engines and transmissions increases, the types of breather hoses increase. The greater the variety of breather hoses, the greater the concern that a breather hose specifically designed for one combination of engine and transmission, such as in a vehicle manufacturing plant, will be mistakenly assembled to another combination of engine and transmission. If the breather hose is incorrectly assembled, the breather hose may be bent between the connection position with the case and the held position by the clamp, clogging the inside of the breather hose and failing to satisfy the function of the breather hose. For this reason, it is necessary to take measures to prevent incorrect assembly of the breather hose in vehicle manufacturing plants and the like, which is time-consuming.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a breather hose that can be commonly used for a plurality of different combinations of connection positions with the case and clamp holding positions.

In order to achieve the above object, the breather hose according to the present invention has one end connected to a case mounted on a vehicle, and is held by a holding member at a holding position separated from the connection position to allow communication between the inside and outside of the case. A breather hose having flexibility and having at least two curved molded portions formed in a curved shape between one end and a portion held by a holding member, wherein the curved molded portions are different from each other It is curved so that it bulges out in the direction.

According to this configuration, the breather hose has at least two curved curved portions formed between one end connected to the case and the portion held by the holding member. The respective curved molded parts differ from each other in the bulging direction of the curve. Therefore, the holding position of the breather hose with respect to the connection position of the breather hose with the case can be swung in at least two directions by deformation of each curved part. This allows the breather hose to be commonly used for a number of different combinations of connection and retention positions. Further, by standardizing the breather hose, it is possible to suppress an increase in the types of breather hoses, and to reduce the concern that the breather hoses may be incorrectly assembled in a vehicle manufacturing plant or the like.

In addition, since each curved portion is formed in a curved shape, it is possible to suppress bending of each curved portion due to deformation. As a result, even if the breather hose is used in a plurality of different combinations of connecting positions and holding positions, it is possible to prevent the breather hose from bending and clogging the interior, and the function of the breather hose, that is, inside and outside the case, can be suppressed. communication can be ensured.

According to the present invention, the breather hose can be commonly used for a plurality of different combinations of connection position with the case and holding position by the clamp. By standardizing the breather hose, it is possible to suppress an increase in the types of the breather hose, and to reduce the concern that the breather hose will be incorrectly assembled in a vehicle manufacturing plant or the like. As a result, it is possible to reduce the labor required for measures to prevent incorrect assembly of the breather hose in a vehicle manufacturing factory or the like.

1 is a front view (as seen from the front side) of a breather hose according to one embodiment of the present invention; FIG. It is a bottom view of the breather hose (view from below). It is a front view which shows the use condition of a breather hose.

BEST MODE FOR CARRYING OUT THE INVENTION Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Shape of breather hose>
FIG. 1 is a front view of a breather hose 1 according to one embodiment of the invention. FIG. 2 is a bottom view of the breather hose 1. FIG.

The breather hose 1 is connected to, for example, a case (not shown) of a CVT (Continuously Variable Transmission) mounted on a vehicle, and communicates the inside and outside of the case to create a difference between the inside and outside of the case. It enables breathing by pressure.

Specifically, inside the case of the CVT, together with members such as gears, oil (fluid) used for operating or lubricating each part is enclosed. The temperature of the oil in the case changes depending on the driving conditions of the vehicle equipped with the CVT. As the temperature of the oil changes, the pressure inside the case changes, creating a differential pressure between the inside and outside of the case. A breather hose 1 is connected to the upper portion of the case to allow breathing inside and outside the case when this differential pressure occurs.

In addition, the arrow which shows a direction is described in each figure after FIG. The left-right direction indicated by an arrow in each figure may coincide with the left-right direction of the vehicle on which the breather hose 1 is mounted, or may intersect with the left-right direction of the vehicle within the same plane. Further, the front-rear direction indicated by an arrow in each drawing may coincide with the front-rear direction of the vehicle, or may intersect with the front-rear direction of the vehicle within the same plane.

The breather hose 1 includes an integrally molded rubber hose body 11 and two EPDM solid exterior bodies 12 and 13 exterior to the hose body 11 .

The hose body 11 is formed as a single tube, and from the side of the one end 21 connected to the case, the first linear portion 22, the first curve-molded portion 23, the second curve-molded portion 24, and the third curve-molded portion. 25, a fourth bending portion 26, a second straight portion 27 and a folded portion 28 in this order.

The first linear portion 22 extends linearly upward from the one end 21 while being slightly inclined to the left.

The first curved molded portion 23 has a shape extending left rearward while curving from the first straight portion 22 in a natural state (undeformed state) so as to bulge forward right and upward. .

The first linear portion 22 may extend linearly upward from the one end 21 without tilting to the left. It may be molded into a shape that extends backward while curving to do so.

The second curved molded portion 24 has a shape extending leftward while curving so as to bulge rearward from the first curved molded portion 23 in a natural state by molding.

The third curved molded portion 25 has a shape extending leftward while curving so as to bulge forward from the second curved molded portion 24 in a natural state by molding. As a result, the second curve-molded portion 24 and the third curve-molded portion 25 are substantially S-shaped.

The fourth curved molded portion 26 naturally extends upward while curving so as to protrude rearward and downward from the third curved molded portion 25 by molding.

The second linear portion 27 linearly extends upward from the fourth curved molded portion 26 .

The folded portion 28 is curved leftward from the second straight portion 27 and folded back downward to form a substantially U shape.

The exterior body 12 is mounted on the second curve-molded portion 24 and the third curve-molded portion 25 while straddling the second curve-molded portion 24 and the third curve-molded portion 25 .

The exterior body 13 is exteriorized on the folded portion 28 .

The exterior bodies 12 and 13 are not limited to EPDM solid, and may be EPDM sponge. Moreover, the breather hose 1 does not have to be provided with the exterior bodies 12 and 13 .

<Use condition of breather hose>
FIG. 3 is a front view showing how the breather hose 1 is used.

One end 21 of the breather hose 1 is connected to the case, and the second straight portion 27 is held by a clamp 31 attached to, for example, an intake manifold of an engine mounted on a vehicle. Therefore, the breather hose 1 has a first curved part 23, a second curved part 24, and a third curved part 23 between the one end 21 connected to the case and the second straight part 27 held by the clamp 31. 25 and a fourth curving portion 26 .

<Effect>
In this manner, the breather hose 1 has the first curved part 23, the second curved part 24, the third straight part 27 held by the clamp 31, and the one end 21 connected to the case. Four curved molded portions, that is, the curved molded portion 25 and the fourth curved molded portion 26 are molded. The first curve-molded portion 23, the second curve-molded portion 24, the third curve-molded portion 25, and the fourth curve-molded portion 26 are different from each other in the curved bulging direction. Therefore, the holding position of the breather hose 1 with respect to the connecting position of the breather hose 1 with the case is changed by the deformation of the first curved part 23, the second curved part 24, the third curved part 25 and the fourth curved part 26. It can swing in multiple directions. Thereby, the breather hose 1 can be commonly used for a plurality of different combinations of holding positions, as indicated by the solid line and the two-dot chain line in FIG. Further, by sharing the breather hose 1, it is possible to suppress an increase in the types of the breather hose 1, and to reduce the concern that the breather hose 1 may be incorrectly assembled in a vehicle manufacturing factory or the like. As a result, in a vehicle manufacturing factory or the like, it is possible to reduce the labor required to prevent incorrect assembly of the breather hose 1 .

In addition, since the first curve-molded portion 23, the second curve-molded portion 24, the third curve-molded portion 25, and the fourth curve-molded portion 26 are molded in a curved shape, they do not expand or contract more than a certain amount. . As a result, even if the breather hose 1 is used in a plurality of different combinations of the connection position with the case and the held position by the clamp 31, the first curve-molded portion 23, the second curve-molded portion 24, and the third curve-molded portion 25 are held. And, bending due to deformation of the fourth bending portion 26 can be suppressed. As a result, even if the breather hose 1 is used in a plurality of different combinations of connecting positions and holding positions, it is possible to prevent the breather hose 1 from being clogged by bending, and the function of the breather hose 1, that is, the case It is possible to ensure communication between the inside and outside of the.

<Modification>
Although one embodiment of the present invention has been described above, the present invention can also be implemented in other forms.

For example, in the above-described embodiment, the breather hose 1 is configured to include four curved portions, that is, the first curved portion 23, the second curved portion 24, the third curved portion 25, and the fourth curved portion 26. picked up. The breather hose 1 is not limited to this, and may be configured to include two or more curved portions that protrude in mutually different directions. may include curved molded portions that bulge in the same direction. Of course, the breather hose 1 may be configured to have five or more curved portions.

The present invention can also be applied to a breather hose connected to the case of a transmission other than a CVT. Furthermore, the present invention can be widely applied to a breather hose connected to a case other than a transmission case, as long as the case produces a differential pressure between the inside and the outside.

In addition, various design changes can be made to the above configuration within the scope of the matters described in the claims.

1: Breather hose 21: One end 23: First curved part 24: Second curved part 25: Third curved part 26: Fourth curved part 27: Second straight part (portion held by holding member)
31: Clamp (holding member)

Claims (1)

A breather hose having one end connected to a case mounted on a vehicle, held by a holding member at a holding position separated from the connection position, and communicating between the inside and outside of the case,
having flexibility,
Between the first linear portion linearly extending from the one end and the second linear portion held by the holding member and linearly extending , at least a first curved molded portion and a second curved molded portion are respectively molded in a curved shape. A curved molding section, a third curved molding section, and a fourth curved molding section ,
A breather hose, wherein the first curve-molded portion , the second curve-molded portion, the third curve-molded portion, and the fourth curve-molded portion are curved so as to bulge in mutually different directions.

Images