JP6923407B2 - Air cleaner duct assembly structure - Google Patents

Description

The present invention relates to an air cleaner duct assembly structure in which an air duct is assembled to an inlet of the air cleaner.

Patent Document 1 describes a structure in which an air duct is assembled to an inlet of an air cleaner of a vehicle engine. In this structure, the case of the air cleaner is formed of a first case having an inlet and a second case fixed on the upper side of the first case, and a filter element is arranged inside the case. A gate-shaped first engaging portion extending upward is integrally formed on the upper outer peripheral surface of the air duct. It is said that rattling of the air duct can be suppressed by engaging the first engaging portion with the protrusion of the second case and providing a sealing portion made of polyurethane resin between the first case and the second case. ..

Japanese Unexamined Patent Publication No. 2016-125379

The configuration described in Patent Document 1 may be able to suppress rattling of the air duct when the air duct tends to rotate with respect to the inlet of the air cleaner, but the structure for that purpose is complicated.

An object of the present invention is to provide an air cleaner duct assembly structure capable of suppressing rattling of the air duct when the air duct tends to rotate with respect to the inlet of the air cleaner with a simple structure.

The air cleaner duct assembly structure of the present invention is an air cleaner duct assembly structure in which an air duct is assembled to an inlet of the air cleaner, and the inlet has an inner peripheral surface having a polygonal cross section and all corners. It has a rounded shape, and the thickness of a part of the inlet is increased in the vicinity of the two first corner R portions diagonally opposite to each other on the inner peripheral surface or the two first corner R portions. It includes two first protrusions which protrudes from the air duct, the outer peripheral surface of the end portion of the inlet side, cross-section a polygonal shape, a shape rounded provided in all corners The thickness of a part of the air duct is increased in the vicinity of the two second corner R portions or the two second corner R portions diagonally opposite to each other on the outer peripheral surface at the end on the inlet side. includes two second protrusion which protrudes in a state in which the said inlet air duct is assembled, and each of the two first protrusions and the corresponding second protrusion, said inlet It is an air cleaner duct assembly structure that is adjacent to each other in the circumferential direction of the inner peripheral surface and faces each other.

According to the above configuration, it is possible to suppress rattling of the air duct when the air duct tends to rotate with respect to the inlet of the air cleaner with a simple structure.

In the air cleaner duct assembly structure of the present invention, preferably, the air upstream side of the air duct is interposed between the lower fixing member and the upper fixing member fixed to the vehicle body and sponge members made of foamed resin on the lower side and the upper side, respectively. At the lower end of the air upstream end of the air duct, the end is sandwiched, and a pin-shaped protrusion is formed at a position different from the lower sponge member, and the pin-shaped protrusion is formed. The pin-shaped protrusion and the grommet are inserted into the holes of the lower fixing member, and the locking portion formed on the grommet is locked to the lower fixing member.

According to the above-mentioned preferable configuration, unlike the case where the air upstream end of the air duct is screwed and fixed to the fixing member fixed to the vehicle body, both the rattling suppression of the air duct and the improvement of the assembling property are achieved. It can be planned.

According to the air cleaner duct assembly structure of the present invention, it is possible to suppress rattling of the air duct when the air duct tends to rotate with respect to the inlet of the air cleaner with a simple structure.

It is the figure which looked at the air cleaner duct assembly structure of the embodiment which concerns on this invention from the top. FIG. 1 is a cross-sectional view taken along the line AA of FIG. It is a cross-sectional view of BB of FIG. FIG. 1 is a cross-sectional view taken along the line CC of FIG. It is an enlarged view of D part of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The shapes, materials, and numbers described below are examples for illustration purposes and can be appropriately changed according to the specifications of the vehicle including the air cleaner duct assembly structure. In the following, the equivalent elements will be described with the same reference numerals in all the drawings. In addition, in the explanation in the text, the codes described earlier shall be used as necessary.

FIG. 1 is a top view of the air cleaner duct assembly structure 10 of the embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is a cross-sectional view taken along the line BB of FIG. FIG. 4 is a cross-sectional view taken along the line CC of FIG. FIG. 5 is an enlarged view of part D of FIG.

The air cleaner duct assembly structure 10 forms an intake structure 12 as an engine intake system in the front structure of the vehicle. In the intake structure 12, the front end portion, which is the upstream end portion of the air, is fixed to the radiator support 30 (FIGS. 2 and 3). The radiator support 30 corresponds to a lower fixing member and is fixed to the vehicle body.

Specifically, the intake structure 12 includes an air duct 13 and an air cleaner 20 coupled to an end portion on the downstream side of the air in the air duct 13. An intake manifold (not shown) of the engine is connected to the end of the air cleaner 20 on the downstream side of the air via another duct (not shown) or the like.

As shown in FIG. 1, the air duct 13 has a substantially L-shape when viewed from above. The vehicle front end, which is the air upstream end of the air duct 13, is placed on the radiator support 30 and has a long lower sponge member 32 (vertical direction in FIG. 1, front and back directions on the paper surface in FIG. 3). It is arranged via FIG. 3).

As shown in FIG. 3, a cover 34 is arranged on the upper side of the vehicle front end portion of the air duct 13 via a long upper sponge member 33 in the vehicle width direction (front and back directions of the paper surface in FIG. 3). The cover 34 is a member elongated in the vehicle width direction, and is fixed to the vehicle body in a state of covering the upper side of the vehicle front end portion of the air duct 13. The cover 34 corresponds to the upper fixing member. The upper sponge member 33 is arranged on the rear side of the vehicle with respect to the lower sponge member 32. The sponge members 32 and 33 are made of foamed resin such as polyurethane.

On the other hand, the lower end of the vehicle front end of the air duct 13 is fixed to the radiator support 30 via the grommet 40 (FIG. 2). Specifically, the lower sponge member at the front end of the air duct 13 at one end in the vehicle width direction (lower end in FIG. 1) is at a different position from the lower sponge member 32 (FIG. 3). A pin-shaped protrusion 14 (FIG. 2) is formed on the rear side of the 32 so as to project downward. The tip of the pin-shaped protrusion 14 is spherical. A hole formed in the upper part of the radiator support 30 through which the tip of the pin-shaped protrusion 14 penetrates in the vertical direction while the resin grommet 40 is attached to the tip of the pin-shaped protrusion 14 which is a spherical portion. It is inserted in 31 (FIG. 2).

The grommet 40 has a bottomed inner cylinder portion 41, a flange portion 42 formed at the upper end of the inner cylinder portion 41 and having a disk-like shape when viewed from above, and a flange portion 42 below the radial intermediate portion of the flange portion 42. It is integrally formed with the outer cylinder portion 43 formed in the above. A spherical recess 41a is formed at the lower end of the inner surface of the inner cylinder 41. The grommet 40 is attached to the pin-shaped protrusion 14 by fitting the tip of the pin-shaped protrusion 14 into the recess 41a. In this state, the tip of the pin-shaped protrusion 14 is prevented from coming out of the recess 41a. The grommet 40 is attached to the pin-shaped protrusion 14, and the tip of the pin-shaped protrusion 14 is inserted into the hole 31 of the radiator support 30 together with the inner cylinder 41 of the grommet 40 and the lower end of the outer cylinder 43. In this state, the locking portions 44 formed at four positions separated from each other in the circumferential direction of the outer tubular portion 43 of the grommet 40 are locked to the lower surface of the radiator support 30. As a result, the air upstream end of the air duct 13 is sandwiched between the radiator support 30 and the cover 34 via the lower sponge member 32 and the upper sponge member 33, respectively. In this state, the sponge members 32 and 33 are elastically compressed. Therefore, the floating of the front end portion of the air duct 13 on the vehicle side is prevented. Further, the lower sponge member 32 can prevent hot air on the engine side from wrapping around from the lower side of the vehicle front end portion of the air duct 13 and being sent inward from the front opening end of the air duct 13. In the grommet 40, a locking portion may be formed on the outer peripheral surface of the outer tubular portion over the entire circumference, and the locking portion may be locked to the lower surface of the radiator support 30.

On the other hand, the air downstream end of the air duct 13 is connected to the inlet 21 of the air cleaner 20. The inlet 21 is formed so as to project in a tubular shape from the side surface of the case 20a (FIG. 1) of the air cleaner 20. Then, the air downstream end 15 which is the end of the air duct 13 on the inlet 21 side is inserted and connected to the inside of the inlet 21 in the substantially width direction of the vehicle (the substantially left-right direction in FIG. 1).

As shown in FIG. 4, the cross-sectional shapes of the inlet 21 and the air downstream end portion 15 of the air duct 13 are non-circular and substantially similar to each other. Specifically, the cross-sectional shape of the inlet 21 and the air downstream end portion 15 of the air duct 13 is such that the upper side of one side (right side in FIG. 4) in the width direction of the rectangle (horizontal direction in FIG. 4) is relative to the width direction. It is a substantially pentagon that looks like it was cut with an inclined straight line. Further, the cross-sectional shape of the inlet 21 and the air downstream end portion 15 of the air duct 13 is formed with curved chamfers at each corner portion. More specifically, the inner peripheral surfaces of the inlet 21 are substantially parallel upper end surfaces 22 and lower end surfaces 23, two substantially parallel side wall surfaces 24 and 25 at both ends in the width direction, and one end in the width direction (right end in FIG. 4). ) Includes an inclined surface 26 connecting the upper end of the side wall surface 24 and the upper end surface 22. The inclined surface 26 is inclined with respect to the upper end surface 22. The outer peripheral surface of the air duct 13 has substantially the same shape as the inner peripheral surface of the inlet 21, and is slightly smaller than the inner peripheral surface of the inlet 21.

Further, the inner peripheral surface of the inlet 21, the lower end of the side wall surface 24 at one end in the width direction, the upper end of the inclined surface, and the upper and lower ends of the side wall surface 25 at the other end in the width direction are mountain-shaped. The first protrusions 27a, 27b, 27c, and 27d are provided, respectively. The first protrusions 27a, 27b, 27c, and 27d extend along the longitudinal direction of the inlet 21. The first protrusions 27a, 27b, 27c, and 27d project from the inner peripheral surface so that the thickness of a part of the inlet 21 is increased. In each of the first protrusions 27a, 27b, 27c, and 27d, the length of the inlet 21 in the circumferential direction is larger than the height of each first protrusion.

On the other hand, on the outer peripheral surface of the air downstream end portion 15 of the air duct 13, the second protrusions 16a and 16b are provided at two positions that are substantially diagonal positions. One of the two second protrusions 16a and 16b is formed on the outer peripheral surface of the air downstream end portion 15 of the air duct 13 at a corner portion which is a continuous portion between the upper end surface 17 and the inclined surface 18. A part of the air downstream end portion 15 projects toward the outer peripheral side so as to increase in thickness. The other second protrusion 16b of the two second protrusions 16a and 16b faces the outer peripheral side at the lower end of the side wall surface 19 at the other end in the width direction on the outer peripheral surface of the air downstream end 15 of the air duct 13. The air is projected so as to increase the thickness of a part of the downstream end portion 15. Then, the inlet 21 is in an assembled state in which the air downstream end 15 of the air duct 13 is assembled. In this assembled state, the two first protrusions 27b and 27d at substantially diagonal positions of the inlet 21 and the two second protrusions 16a and 16b at substantially diagonal positions of the air duct 13 are inside the inlet 21. They are adjacent to each other in the circumferential direction of the peripheral surface and face each other. It is preferable that the two first protrusions 27b and 27d are in contact with the second protrusions 16a and 16b adjacent to the first protrusions 27b and 27d.

According to the above structure, with the air duct 13 assembled to the inlet 21, the first protrusions 27b and 27d of the inlet 21 and the second protrusions 16a and 16b of the air duct 13 are on the inner peripheral surface of the inlet 21. They are adjacent to each other in the circumferential direction and face each other. As a result, it is possible to suppress rattling of the air duct 13 when the air duct 13 tends to rotate with respect to the inlet 21 with a simple structure. Further, by forming the first protrusions 27b and 27d and the second protrusions 16a and 16b, the rigidity of the inlet 21 and the downstream end 15 of the air duct 13 can be increased. As a result, even when the adjacent first protrusions 27b and 27d and the second protrusions 16a and 16b are strongly engaged with each other, the inlet 21 and the downstream end portion 15 are less likely to be deformed.

Further, the front end portion of the air duct 13 is sandwiched between the radiator support 30 and the cover 34 via the sponge members 32 and 33 on the lower side and the upper side, respectively. Further, at the lower end of the front end of the air duct 13, a pin-shaped protrusion 14 projecting downward is formed at a position different from that of the lower sponge member 32. Further, with the grommet 40 attached to the pin-shaped protrusion 14, the pin-shaped protrusion 14 and the grommet 40 are inserted into the holes 31 of the radiator support 30, and the locking portion 44 formed in the grommet 40 is the radiator support 30. Locked to. As a result, unlike the case where the front end portion of the air duct is screwed and fixed to the fixing member fixed to the vehicle body, the air duct 13 can be suppressed from rattling and the assembling property can be improved at the same time. In the embodiment, with the grommet 40 attached to the pin-shaped protrusion 14, the pin-shaped protrusion 14 and the grommet 40 are inserted into the hole 31 of the radiator support 30, so that the front end portion of the air duct 13 becomes the radiator support 30. Can be combined.

The two second protrusions of the air duct 13 are the first protrusion 27c located at the upper end of the other end in the width direction of the inlet 21 and the lower end of one end in the width direction on the outer peripheral surface of the air downstream end portion 15. It can also be formed at a position adjacent to each of the first protrusion 27a located at. Further, the second protrusions of the air duct 13 can be formed at four positions so as to face each of the first protrusions 27a, 27b, 27c, 27d of the inlet 21 in the circumferential direction so as to be adjacent to each other. Further, the cross-sectional shape of the inlet 21 and the air duct 13 with the air downstream end portion 15 is not limited to the shape shown in FIG. 4, and may be a non-circular shape such as a rectangle or a circular shape.

10 Air cleaner duct assembly structure, 12 intake structure, 13 air duct, 14 pin-shaped protrusion, 15 air downstream end, 16a, 16b second protrusion, 17 upper end surface, 18 inclined surface, 19 side wall surface, 20 air cleaner, 20a Case, 21 inlet, 22 upper end surface, 23 lower end surface, 24, 25 side wall surface, 26 inclined surface, 27a, 27b, 27c, 27d first protrusion, 30 radiator support, 31 holes, 32 lower sponge member, 33 upper side Sponge member, 34 cover, 40 grommet, 41 inner cylinder, 41a recess, 42 flange, 43 outer cylinder, 44 locking.

Claims (1)

It is an air cleaner duct assembly structure in which an air duct is assembled to the inlet of the air cleaner.
The inlet has a shape in which the inner peripheral surface has a polygonal cross section and all corners are rounded, and the two first corner R portions or the said above are located diagonally to each other on the inner peripheral surface. In the vicinity of the two first corner R portions, the two first projection portions are provided so as to project so as to increase the thickness of a part of the inlet.
The air duct, the outer peripheral surface of the end portion of the inlet side, cross-section a polygonal shape, a shape rounded provided in all corners, mutually diagonal of the outer peripheral surface at the end of the inlet-side in the vicinity of the two second corner R part or the two second corner R portion at a position, it includes two second projecting portions which protrudes such that a portion of the thickness of the air duct is increased,
In a state in which the air duct to the inlet is assembled, and each of the two first protrusions and the corresponding said second protrusion is opposed adjacently to the circumferential direction of the inner peripheral surface of the inlet , Air cleaner duct assembly structure.

Images