JP2019065788A - Vehicular intake hose - Google Patents

Abstract

To reinforce a passage forming portion of a hose body by a reinforcing portion.SOLUTION: An air cleaner hose 14 is equipped with a hose body 22 formed with an air channel passage 24 by a cylindrical passage forming portion 26. The hose body 22 is provided with a reinforcing portion 30 formed so as to bulge out from the passage forming portion 26 over the whole circumference of the passage forming portion 26. The reinforcing portion 30 has a part extending so as to incline to a cross section orthogonal to an air circulating direction of the air channel passage 24, and deviating across the air circulating passage 24.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle intake hose for introducing air into an engine.

  In a vehicle such as an automobile, an intake system for introducing air to an engine is configured by a duct, a hose, and the like. For example, the intake system includes an intake duct for taking in air, an air cleaner for removing dust and dirt from the taken-in air, and an air cleaner hose connecting the air cleaner and the intake manifold. As such an air cleaner hose, a pipe-shaped molded article made of a synthetic resin such as a rubber material or a thermoplastic elastomer is used.

  The air cleaner hose is required to have a rigidity such that the air cleaner hose is not crushed even if the filter of the air cleaner is clogged to increase the negative pressure in the air cleaner hose. Then, what formed the thick part by which the reinforcement filament was inserted in the surface of an air cleaner hose, and reinforced so that an air cleaner hose might not be crushed by a negative pressure is proposed (for example, refer to patent documents 1).

Unexamined-Japanese-Patent No. 1-80888 gazette

  In the air cleaner hose disclosed in Patent Document 1, in order to withstand a negative pressure, reinforcement rib filaments are inserted and the thick portion is formed in a mesh shape, so the weight of the air cleaner hose increases. A problem is pointed out.

  SUMMARY OF THE INVENTION In view of the above-mentioned problems in the prior art, the present invention has been proposed to suitably solve these problems, and effectively reinforcing the hose body by the reinforcing portion to suppress the weight increase by the reinforcing portion. It is an object of the present invention to provide a vehicle intake hose capable of

In order to overcome the above-mentioned problems and achieve the intended purpose, the vehicle intake hose of the invention according to claim 1 of the present application,
A hose body having an air flow passage formed by the cylindrical passage formation portion;
And a reinforcing portion extending from the passage forming portion over the entire circumference of the passage forming portion, and extending to incline with respect to a cross section orthogonal to the air circulation direction of the air flow passage. As the abstract.
According to the first aspect of the present invention, the reinforcing portion is formed so as to extend at an angle with respect to the cross section orthogonal to the air flow direction of the air flow path, whereby the reinforcing portion is shifted and extended across the air flow path. The reinforcing portion can effectively reinforce the hose body and appropriately prevent buckling of the hose body. Further, since the reinforcing effect of the hose main body by the reinforcing portion is high, the size and the number of the reinforcing portions can be suppressed, and the weight increase of the vehicle intake hose can be prevented.

In the invention according to claim 2, the hose body has a curved portion,
A gist is that the curved portion or the reinforcing portion disposed in the vicinity of the curved portion is formed to be inclined such that portions extending in a direction to be an axis of bending of the curved portion are deviated.
According to the invention which concerns on Claim 2, the buckling of a curved part can be appropriately prevented by the reinforcement part in which the inclination was set by the relationship with the curve of a curved part.

In the invention according to claim 3, it is characterized in that the reinforcing portion is formed asymmetrically in which portions sandwiching the air flow passage are shifted in the air circulation direction.
According to the third aspect of the present invention, the hose main body can be effectively reinforced by the asymmetrically formed reinforcing portions in which the portions sandwiching the air flow passage are offset in the air flow direction, and the buckling of the hose main body is appropriate. Can be prevented.

  According to the vehicle intake hose of the present invention, the reinforcing portion can effectively reinforce the hose body, and the increase in weight due to the reinforcing portion can be suppressed.

It is an explanatory view showing an intake system using an air cleaner hose concerning a desirable example of the present invention. The reinforced portion of the air cleaner hose is not shown. It is a top view which shows the air cleaner hose of an Example. It is a front view showing an air cleaner hose of an example. It is an end elevation cut by the AA line of FIG. (a) is a view on arrow B in FIG. 2 schematically showing a part of the straight part of the air cleaner hose of the embodiment, and (b) is a part of the straight part of the air cleaner hose of the embodiment It is a C arrow line view of Drawing 3 shown roughly, (c) is a DD line sectional view of (a), (d) is an EE line sectional view of (b). (a) is a view on arrow F in FIG. 2 schematically showing a part of the curved portion of the air cleaner hose of the embodiment, and (b) shows a portion of the curved portion of the air cleaner hose of the embodiment It is G arrow line view of Drawing 3 shown roughly, (c) is a H-H line sectional view of (a), (d) is an I-I line sectional view of (b).

  Next, a vehicle intake hose according to the present invention will be described below by way of preferred embodiments with reference to the attached drawings. In the embodiment, an air cleaner hose is illustrated as the vehicle intake hose.

  As shown in FIG. 1, the intake system of the vehicle directs air taken from the intake duct 10 (outside air) to the engine 18 through the air cleaner hose 14 and the throttle body 16 after being cleaned through the air cleaner 12. Is configured. The air cleaner hose 14 may be provided with a resonance type resonator (not shown) in order to suppress the generation of noise due to intake.

  As shown in FIGS. 2 to 4, the air cleaner hose 14 includes a hose body 22 having an air flow passage 24 for guiding air from the air cleaner 12 toward the engine 18. The hose body 22 defines an air flow passage 24 by a passage forming portion 26 formed in a cylindrical shape (cylindrical in the embodiment). Further, in the middle of the hose main body 22 is provided a serpentine portion 28 which repeats a mountain fold and a valley fold, so that the hose main body 22 can be bent by the serpentine portion 28. The hose body 22 of the embodiment is provided on the inlet side (upstream side in the air circulation direction) in which the bellows portion 28 is connected to the air cleaner 12. Here, the inlet side at which the hose body 22 is connected to the air cleaner 12 is referred to as the air flow direction upstream side, and the outlet side connected to the throttle body 16 is referred to as the air flow direction downstream side.

  As shown in FIGS. 2 and 3, in the hose body 22, the passage forming portion 26 linearly extends to define an air flow passage 24 which linearly communicates from the upstream side to the downstream side in the air flow direction. Provided with the straight portion 22A. Further, the hose main body 22 includes a curved portion 22B which extends so that the passage forming portion 26 curves and defines an air flow passage 24 which is bent as going from the upstream side to the downstream side in the air flow direction. It has a three-dimensional shape in which 22A and the curved portion 22B are combined. Specifically, a curved portion (referred to as upstream curved portion 22Ba in the case of distinction) provided on the air flow direction downstream side of the bellows portion 28 and a straight line provided on the air flow direction downstream side of the upstream curved portion 22Ba It includes a portion 22A and a curved portion (referred to as a downstream curved portion 22Bb in the case of distinction) provided on the downstream side of the linear portion 22A in the air flow direction.

  The air cleaner hose 14 may be a rubber material such as urethane rubber, acrylonitrile butadiene rubber (NBR), ethylene / propylene rubber (EPM), ethylene / propylene / diene rubber (EPDM), an olefin-based thermoplastic elastomer (TPO) or a dynamic material. It is made of a thermoplastic elastomer such as a cross-linked thermoplastic elastomer (TPV) or the like, and has flexibility. The air cleaner hose 14 is formed by injection molding in a molding die provided with a core fitted to the air flow passage 24 to integrally form the bellows 28 and the reinforcing portion 30 described later, and the air is blown. It is obtained by inflating and taking out the core.

  As shown in FIGS. 2 to 6, the air cleaner hose 14 has a reinforcing portion 30 formed over the entire circumference of the passage forming portion 26 in the hose main body 22. The reinforcing portion 30 is integrally formed with the passage forming portion 26 so as to project outward from the passage forming portion 26 which is a wall defining the air flow passage 24. That is, the passage forming portion 26 is partially thickened by the reinforcing portion 30. The reinforcing portion 30 is formed in a tapered cross-sectional shape which narrows as it goes from the wide root connected to the passage forming portion 26 to the tip end (see FIG. 4). The reinforcing portion 30 of the embodiment has a cross-sectional shape in which a root is smoothly curved and continuously connected to the outer surface of the passage forming portion 26, and a tip end is formed in an arc shape.

  As shown in FIGS. 4 to 6, the reinforcing portion 30 extends so as to be inclined with respect to a cross section (hereinafter referred to as a reference cross section S) orthogonal to the air flow direction of the air flow passage 24. The reference cross section S is virtually set so as to be orthogonal to the air flow direction of the air flow passage 24 at a reinforcing position where the passage forming portion 26 of the hose main body 22 is to be reinforced. Further, the air circulation direction defining the reference cross section S refers to one defined by the passage forming portion 26 of the hose main body 22 at the arrangement position of the reinforcing portion 30, and in the case of the curved portion 22B, a tangent line along the curve of the reinforcement position It becomes a direction.

  As shown in FIGS. 5 and 6, the reinforcing portion 30 has an asymmetrical relationship such that at least portions extending in one direction along the reference cross section S across the air flow passage 24 are displaced in the air circulation direction. It is provided. For example, the reinforcing portion 30 sandwiches the air flow passage 24 in a direction (a portion X1) corresponding to a point (position P1) on the circumferential surface of the passage forming portion 26 and a direction perpendicular to the air flow direction with respect to the position P1. And the portion (X2) corresponding to the point (position P2) on the opposite side is shifted in the air flow direction (see FIGS. 5 (d) and 6 (d)). In the reinforcing portion 30 of the embodiment, the portions extending across the air flow passage 24 are formed in an asymmetric relationship so that they are offset in the air flow direction. Specifically, in the reinforcing portion 30, not only the portion X1 and the portion X2 are deviated in the air flow direction, but also on the straight line orthogonal to the straight line connecting the position P1 and the position P2 on the circumferential surface of the passage forming portion 26 The portion X3 corresponding to the position P3 located at the position P3 and the portion X4 corresponding to the position P4 on the opposite side across the position P3 and the air flow passage 24 are shifted in the air flow direction (FIG. 5 (c) and FIG. 6 (c)). Thus, in the reinforcing portion 30 extending around the entire circumference of the passage forming portion 26, each portion in the circumferential direction of the passage forming portion 26 is asymmetric with respect to the air flow passage 24 in the direction orthogonal to the air flow direction. Is formed. Further, in the reinforcing portion 30, the portions X1 to X4 are deviated from the reference cross section S, and the reference cross section S is located between the portions sandwiching the air flow passage 24 in the reinforcing portion 30.

  As shown in FIG. 5 and FIG. 6, the reinforcing portion 30 is a position P2 (position) opposite to the position P1 (P3) and the air flow passage 24 from the portion X1 (X3) corresponding to the position P1 (P3). As it goes to the part X2 (X4) corresponding to P4), it inclines so that it may be displaced to the air circulation direction upstream or downstream. The reinforcing portion 30 may extend in an arc by gradually changing the inclination between the portion X1 (X3) and the portion X2 (X4) (Example), and the inclination is the portion X1 (X3) and the portion It may be constant with X 2 (X 4), or the slope may change halfway. The reinforcing portion 30 may be disposed so as to be shifted so that the portion X1 (X3) and the portion X2 (X4) partially overlap in the direction along the reference cross section S (FIG. 5 (c) and FIG. 6 (c) And the portions X1 (X3) and X2 (X4) may be formed so as not to overlap in the direction along the reference cross section S (FIG. 5 (d) and FIG. 6 (d)).

  In the embodiment, the upper surface of the passage forming portion 26, which is the upper surface of the air cleaner hose 14, is located at position P1 for the sake of convenience, and the upper end of the reinforcing portion 30 is set as the portion X1. Corresponding to this, the lower surface of the passage forming portion 26 is located It becomes P2, and the lower end of reinforcement part 30 becomes part X2. Further, the right side of the passage forming portion 26 looking at the air flow passage 24 in the air flow direction is taken as a position P3 for the sake of convenience, and the right end of the reinforcing portion 30 is taken as the portion X3. At the position P4, the left end of the reinforcing portion 30 is the portion X4.

  As shown in FIG. 4, in the air cleaner hose 14, when providing a plurality of reinforcing portions 30 apart in the air circulation direction, it is preferable to make the inclinations of the plurality of reinforcing portions 30 in the same direction. In the embodiment, the reinforcing portions 30, 30 adjacent to each other in the air flow direction are inclined with respect to the upper end portion X1 such that the lower end portion X2 is positioned downstream in the air flow direction, and the right end portion X3 All are inclined so that the left end portion X4 is located on the upstream side in the air flow direction. As described above, by setting the inclinations of the plurality of reinforcing portions 30 in the same direction, it is possible to prevent widening between the adjacent reinforcing portions 30 and 30, and desired rigidity of the entire passage forming portion 26 (hose main body 22) Can be secured.

  As shown in FIGS. 2 and 4, the air cleaner hose 14 is provided with two reinforcing portions 30 (in the case of particular distinction, referred to as the first reinforcing portion 30A) in the straight portion 22A, and an upstream curved portion One reinforcing portion 30 (referred to as a second reinforcing portion 30B particularly in the case of distinction) is provided for each of the 22Ba and the downstream curved portion 22Bb. In the hose main body 22 of the embodiment, the first reinforcing portion 30A is provided on each of the upstream side and the downstream side of the straight portion 22A in the air circulation direction, and the first reinforcing portion 30A is a boundary with the curved portion 22B (curved portion 22B In the vicinity of

  As shown in FIG. 5D, the first reinforcing portion 30A is inclined such that the portion X2 on the lower surface of the passage forming portion 26 is positioned downstream of the portion X1 on the upper surface of the passage forming portion 26 in the air flow direction. There is. That is, the first reinforcing portion 30A is formed so that the portion X1 and the portion X2 extending in the direction of the bending axis of the adjacent curved portion 22B are offset. Further, the first reinforcing portion 30A is inclined such that the portion X4 on the left surface of the passage forming portion 26 is positioned upstream of the portion X3 on the right surface of the passage forming portion 26 (see FIG. 5C) ). That is, the first reinforcing portion 30A is formed such that the portion X3 extending in the radial direction of the bend of the adjacent curved portion 22B and the portion X4 are offset. The first reinforcing portion 30A, which is formed by being inclined in the air flow direction over the entire circumference of the passage forming portion 26, may be formed to be applied to both the straight portion 22A and the curved portion 22B.

  As shown in FIG. 6, the second reinforcing portion 30B is provided corresponding to the curved portion 22B. The second reinforcing portion 30B disposed in the bending portion 22B is formed to be inclined such that at least the portion X1 extending in the direction of the bending axis of the bending portion 22B and the portion X2 are deviated (FIG. 6 (d )reference). That is, the second reinforcing portion 30B is inclined such that the portion X2 of the lower surface of the passage forming portion 26 is positioned downstream of the portion X1 of the upper surface of the passage forming portion 26 in the air flow direction. In addition, the second reinforcing portion 30B is formed to be inclined such that the portion X3 and the portion X4 extending in the radial direction of the bending of the curved portion 22B are deviated (see FIG. 6C). That is, the second reinforcing portion 30B is inclined such that the portion X4 on the left surface of the passage forming portion 26 is positioned upstream of the portion X3 on the right surface of the passage forming portion 26 in the air flow direction. In the embodiment, in the second reinforcing portion 30B, the portion X3 which is inside the bend of the curved portion 22B is shifted to the downstream side in the air flow direction than the reference cross section S, and the portion X4 which is outside the bend of the curved portion 22B is It is shifted upstream in the air circulation direction with respect to the reference cross section S. As described above, the direction of inclination of the second reinforcing portion 30B is set in association with the bending of the bending portion 22B, so that at least portions extending in the direction of the bending axis of the bending portion 22B deviate from each other. Be tilted. As for the first reinforcing portion 30A provided so as to partially cover the bending portion 22B or in the bending portion 22B, it is preferable to set the direction of inclination in association with the bending of the adjacent bending portion 22B as in the second reinforcing portion 30B. .

  The reinforcing portion 30 of the embodiment may set an inclination with respect to the reference cross section S corresponding to the reinforcing direction in which the passage forming portion 26 easily bends, such as the direction of the bending axis of the curved portion 22B. Specifically, in the reinforcing portion 30, a position at which the displacement (X1 and X2) between the portions (X1 and X2) corresponding to the positions facing in the reinforcing direction (for example, P1 and P2 of the curved portion 22B) opposes in the direction orthogonal to the reinforcing direction. It is larger than the displacement of the portions (X3 and X4) corresponding to (P3 and P4 of the curved portion 22B).

  For example, as in the conventional air cleaner hose, when reinforcement filaments are set around the reference cross section S so as to be orthogonal to the air flow direction, all parts of the reinforcement filaments are in a symmetrical relationship across the air flow passage 24. Become. When the negative pressure applied to the hose main body 22 becomes high due to clogging of the air cleaner 12, etc. and the buckling of the passage forming portion 26 of the hose main body 22 starts, the buckling starts in the reinforcing filaments all in symmetrical positional relationship. The portion on the opposite side of the air flow passage 24 also tends to cause buckling.

  For example, when a force (negative pressure) is applied to cause the air cleaner hose 14 to buckle at a position P1 (P3) on the circumferential surface of the passage forming portion 26, the air cleaner hose 14 corresponds to the position P1 (P3). Since the portion X1 (X3) extends, buckling of the position P1 (P3) of the passage forming portion 26 can be prevented. The reinforcing portion 30 extends so as to incline with respect to the reference cross section S passing through the position P1 (P3) and the position P2 (P4) opposed to the position P1 (P3) across the airflow passage 24. A portion X2 (X4) of the reinforcing portion 30 corresponding to the position P2 (P4) is disposed to be shifted upstream or downstream in the air flow direction with respect to the portion X1 (X3). Even if force is applied to the position P1 (P3) of the passage forming portion 26 by the reinforcing portion 30 formed asymmetrically with the portion X1 (X3) and the portion X2 (X4) sandwiching the air flow passage 24, the position P2 (P4) It is possible to avoid the induction of buckling on the side). The reinforcing portion 30 of the embodiment is not asymmetrical only in the relationship between the portion X1 (X3) and the portion X2 (X4), and each portion sandwiching the air flow passage 24 over the entire circumference of the passage forming portion 26 The relationship is asymmetry which is mutually offset in the air flow direction. Therefore, even if negative pressure is applied to the passage forming portion 26, the reinforcement portion 30 can prevent the induction of buckling over the entire circumference of the passage forming portion 26.

  Thus, in the air cleaner hose 14, the passage forming portion 26 of the hose main body 22 is less likely to be buckled by the reinforcing portion 30, and a desired rigidity can be secured. Moreover, since the reinforcing effect of each reinforcing portion 30 is high, the size (width, height, etc.) and the number of the reinforcing portions 30 can be suppressed as compared with the conventional case, and the weight increase of the air cleaner hose 14 is prevented. it can. In addition, since the reinforcing portion 30 can be formed only by partially thickening the passage forming portion 26 without inserting a reinforcing material such as a wire into the reinforcing portion 30, the weight increase of the air cleaner hose 14 Can be prevented and the manufacturing process of the air cleaner hose 14 can be simplified. Here, since the reinforcing portion 30 extends seamlessly around the entire circumference of the hose main body 22, it is possible to prevent the hose main body 22 from being deformed starting from the cut of the reinforcing portion 30.

  The air cleaner hose 14 secures the rigidity of the curved portion 22B by providing the second reinforcing portion 30B corresponding to the curved portion 22B of the hose main body 22. Since the second reinforcing portion 30B is formed so that the portions extending in the direction of the bending axis of the bending portion 22B are offset from each other, the bending portion 22B that easily buckles in the direction of the bending axis is appropriately reinforced. can do.

For example, the present invention may be modified as follows.
(1) As in the embodiment, it is preferable from the viewpoint of pressure loss of air passing through the air flow passage to form the reinforcing portion so as to project outward and to form the inner surface of the passage forming portion in the hose body smoothly. . However, the present invention is not limited to this, and it is also possible to form the reinforcing portion so as to protrude inward (air flow passage side) from the passage forming portion.
(2) In the embodiment, the first reinforcing portion provided in the straight portion of the passage forming portion in the hose main body is associated with the bending of the adjacent curved portion to set the direction of inclination with respect to the reference cross section. (1) The reinforcing portion may be set to the direction of inclination regardless of the bending of the curved portion.
(3) In the embodiment, the reinforcing portions are formed in an asymmetrical relationship in which the respective portions sandwiching the air flow passage are offset from each other in the air circulation direction over the entire circumference of the passage forming portion. Although the portion X1 and the portion 2 described above are asymmetrically shifted in the air flow direction, the reinforcing portion may be formed so that the portions X3 and X4 are symmetrical. As described above, when setting the inclination of the reinforcing portion as a single axis, the reinforcing portions are arranged such that the portions extending in the direction in which the passage forming portion easily bends in the reinforcing portion are deviated, such as the direction of the bending axis of the curved portion. It is good to set the inclination of.
(4) Although the air cleaner hose was illustrated in the Example, if it comprises the intake system hose of a vehicle, it will not restrict to this.

22 hose body 22 B curved portion 24 air flow passage 26 passage forming portion
30 Reinforcement (30A 1st Reinforcement, 30B 2nd Reinforcement)

Claims (3)

A hose body having an air flow passage formed by the cylindrical passage formation portion;
And a reinforcing portion extending from the passage forming portion over the entire circumference of the passage forming portion, and extending to incline with respect to a cross section orthogonal to the air circulation direction of the air flow passage. Intake hose for vehicles characterized by. The hose body has a curved portion,
The vehicle according to claim 1, wherein the curved portion or the reinforcing portion disposed in the vicinity of the curved portion is formed to be inclined such that portions extending in a direction to be an axis of bending of the curved portion are deviated. Intake hose.   The vehicle intake hose according to claim 1 or 2, wherein the reinforcing portion is formed asymmetrically in which portions sandwiching the air flow passage are shifted in the air circulation direction.

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