Vehicle front structure

Abstract

To provide a vehicle front structure which can secure introduction air performance by a duct stably.SOLUTION: An upstream side end part 21 of a duct 20 is configured so as to be mounted to an upstream side coupling member 30 by being externally fitted on an upstream side tubular part 31 over whole circumference continuously. A downstream side end part 22 of the duct 20 is mounted to a downstream side coupling member 40 by being externally fitted on a downstream tubular part 41 over whole circumference continuously. Therefore, both of the upstream side end part 21 and the downstream side end part 22 of the duct 20 can be recognized as a whole circumference continuous fit structure (whole circumference continuous external fitting structure). A vehicle front structure can restrain the duct 20 from being dislocated against the upstream side coupling member 30 and the downstream side coupling member 40 even though load is applied to the duct 20 when mounting to the vehicle V (at assembled time) and when the vehicle travels. Accordingly, the vehicle front structure can secure introduction air performance by the duct 20 stably.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a vehicle front structure having a duct.

Background Art

[0002] Japanese Patent Application Laid-Open No. 2014-226953 discloses a technique in which a duct for guiding cooling air to a drive unit installed inside a front wheel of a vehicle is attached to a front bumper at an upstream end and to a wheel house at a downstream end.

[0003] In order to achieve cooling performance in air guiding by the duct, it is necessary to stably flow the intended air. However, in the technique disclosed in the above publication, as shown in FIG. 6, among the attachment portions of the duct 1 to the wheel house 2, only the attachment portion 1a on the inner side in the vehicle width direction is attached to the wheel house 2 in the vehicle longitudinal direction and is not structured to be attached in the vehicle width direction. Therefore, when the duct 1 is attached to the vehicle (during assembly) or when a load in the vehicle width direction is applied to the duct 1 during vehicle travel, the position of the duct 1 is likely to shift, and the air guiding performance (stability of air guiding by the duct 1) by the duct 1 may deteriorate. Therefore, there is room for improvement in terms of ensuring the air guiding performance by the duct.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a vehicle front structure capable of stably ensuring the air guiding performance by a duct.

Means for Solving the Problems

[0006] The present invention for achieving the above object is as follows. (1) A duct disposed at the front of a vehicle, having an upstream end portion, a downstream end portion, and a connecting portion connecting the upstream end portion and the downstream end portion, an upstream coupling member to which the upstream end portion of the duct is attached, a downstream coupling member to which the downstream end portion of the duct is attached, and having, the upstream coupling member having a cylindrical upstream cylindrical portion protruding downstream, the downstream coupling member having a cylindrical downstream cylindrical portion protruding upstream, fluid flowing from the inside of the upstream cylindrical portion through the inside of the duct to the inside of the downstream cylindrical portion, the upstream end portion of the duct being attached to the upstream coupling member by being continuously externally fitted around the entire circumference to the upstream cylindrical portion, and the downstream end portion of the duct being attached to the downstream coupling member by being continuously externally fitted around the entire circumference to the downstream cylindrical portion, a vehicle front structure. (2) The upstream end portion of the duct has an upstream enlarged portion that continues to the connecting portion and has an inner cross-sectional area that becomes larger toward the upstream, and an upstream fitting portion that continues to the upstream enlarged portion and is externally fitted to the upstream cylindrical portion, the vehicle front structure according to (1). (3) An upstream seal member that extends continuously around the entire circumference is disposed between the upstream fitting portion and the upstream cylindrical portion, the vehicle front structure according to (2). (4) The downstream end portion of the duct has a downstream enlarged portion that continues to the connecting portion and has an inner cross-sectional area that becomes larger toward the downstream, and a downstream fitting portion that continues to the downstream enlarged portion and is externally fitted to the downstream cylindrical portion, the vehicle front structure according to (1). (5) A downstream seal member that extends continuously around the entire circumference is disposed between the downstream fitting portion and the downstream cylindrical portion, the vehicle front structure according to (4). (6) The duct has an outward protruding portion that protrudes from the connecting portion to the outside of the duct, The vehicle front structure according to (1), further comprising an intermediate coupling member to which the outer protruding portion of the duct is attached. (7) The vehicle front structure according to (1), wherein the upstream end portion, the downstream end portion, and the connecting portion of the duct are integrally formed.

Advantages of the Invention

[0007] According to the vehicle front structure of the above (1), the upstream end portion of the duct is attached to the upstream coupling member by being continuously externally fitted over the entire circumference to the upstream cylindrical portion, and the downstream end portion of the duct is attached to the downstream coupling member by being continuously externally fitted over the entire circumference to the downstream cylindrical portion. Therefore, both the upstream end portion and the downstream end portion of the duct can have a full - circumference continuous fitting structure (full - circumference continuous external fitting structure), and even when a load acts on the duct during vehicle installation (assembly) or vehicle running, the duct can be prevented from shifting with respect to the upstream coupling member and the downstream coupling member. Thus, the air - guiding performance of the duct can be stably ensured.

[0008] According to the vehicle front structure of the above (2), since the upstream end portion of the duct has an upstream expanding portion that continues to the connecting portion and has an inner cross - sectional area that increases toward the upstream, and an upstream fitting portion that continues to the upstream expanding portion and is externally fitted to the upstream cylindrical portion, it is possible to suppress the formation of a step at the parting portion between the connecting portion of the duct and the upstream cylindrical portion. Thus, it is possible to suppress the disturbance of the flow of the fluid flowing from the inside of the upstream cylindrical portion to the inside of the duct.

[0009] According to the vehicle front structure of the above (3), since an upstream sealing member that continuously extends over the entire circumference is disposed between the upstream fitting portion and the upstream cylindrical portion, it is possible to suppress the upstream end portion of the duct from shifting (moving, rattling) with respect to the upstream cylindrical portion. Also, it is possible to suppress the flow of fluid between the upstream fitting portion and the upstream cylindrical portion.

[0010] According to the vehicle front structure of (4) above, since the downstream end of the duct has a downstream enlarged portion that is continuous with the connecting portion and has an inner cross-sectional area that increases toward the downstream side, and a downstream fitting portion that is continuous with the downstream enlarged portion and is externally fitted to the downstream cylindrical portion, it is possible to suppress the formation of a step at the parting portion between the connecting portion of the duct and the downstream cylindrical portion. Therefore, it is possible to suppress the disturbance of the flow of the fluid flowing from the inside of the duct to the inside of the downstream cylindrical portion.

[0011] According to the vehicle front structure of (5) above, since a downstream seal member that continuously extends over the entire circumference is arranged between the downstream fitting portion and the downstream cylindrical portion, it is possible to suppress the downstream end of the duct from shifting (moving, rattling) with respect to the downstream cylindrical portion. Also, it is possible to suppress the flow of fluid between the downstream fitting portion and the downstream cylindrical portion.

[0012] According to the vehicle front structure of (6) above, since the duct has an outward protruding portion that protrudes from the connecting portion to the outside of the duct, and has an intermediate portion coupling member to which the outward protruding portion of the duct is attached, it is possible to effectively suppress the duct from shifting with respect to the upstream coupling member and the downstream coupling member even when a load acts on the duct during vehicle travel.

[0013] Also, since the outward protruding portion of the duct protrudes from the connecting portion of the duct to the outside of the duct, the duct can be attached to the intermediate portion coupling member without affecting the inside of the duct (without reducing the inner cross-sectional area of the inside of the duct).

[0014] According to the vehicle front structure of (7) above, since the upstream end, the downstream end, and the connecting portion of the duct are integrally formed, unlike the case where the upstream end, the downstream end, and the connecting portion of the duct are composed of a plurality of parts (the duct has a split duct structure), there is no possibility of displacement between the split parts, and the air guiding performance by the duct can be stably ensured.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0016] Hereinafter, with reference to the drawings, the vehicle front structure 10 of an embodiment of the present invention will be described. In the drawings, UPR indicates above the vehicle, RH indicates the right side in the vehicle width direction, and FR indicates the front of the vehicle.

[0017] In FIGS. 1 to 5, the vehicle front structure 10 of an embodiment of the present invention is shown. As shown in FIG. 2, the vehicle front structure 10 of an embodiment of the present invention includes a duct 20, an upstream coupling member 30, a downstream coupling member 40, an intermediate coupling member 50 (see FIG. 3), an upstream seal member 60, and a downstream seal member 61.

[0018] The duct 20 is disposed at the front part of the vehicle V. The duct 20 is not particularly limited, but is made of a resin such as PP (polypropylene) or PE (polyethylene), and is, for example, a blow molded product. The duct 20 is used to guide the fluid (air, running wind) introduced into the vehicle V from the front side of the vehicle to the vicinity of a front brake (not shown) disposed inside the front tire 100. The duct 20 is provided to extend in the vehicle front-rear direction, and has an upstream end portion 21 which is the front end portion of the vehicle, a downstream end portion 22 which is the rear end portion of the vehicle, a connecting portion 23 which connects the upstream end portion 21 and the downstream end portion 22, and an outward protruding portion 24 (see FIG. 3).

[0019] As shown in FIG. 4, only one upstream end portion 21 is provided, and it is attached (connected, assembled) to an upstream cylindrical portion 31 of an upstream coupling member 30 described later. The upstream end portion 21 has an upstream enlarged portion 21a and an upstream fitting portion 21b that are continuously provided over the entire circumference.

[0020] The upstream enlarged portion 21a is a portion that continues to the upstream end of the connecting portion 23 and has an inner cross-sectional area that increases toward the upstream. The upstream enlarged portion 21a extends from the connecting portion 23 and bends in a direction where the inner cross-sectional area increases toward the upstream, and is a portion that bends at the tip of the extending direction and continues to the upstream fitting portion 21b. The upstream fitting portion 21b is a portion that continues to the upstream end of the upstream enlarged portion 21a and is externally fitted to the upstream cylindrical portion 31. The inner surface 21b1 of the upstream fitting portion 21b faces the outer surface 31a of the upstream cylindrical portion 31.

[0021] The upstream end portion 21 is attached to the upstream coupling member 30 by the upstream fitting portion 21b being continuously externally fitted to the upstream cylindrical portion 31 over the entire circumference (by the upstream fitting portion 21b covering the upstream cylindrical portion 31 from the outside over the entire circumference).

[0022] An upstream seal member 60 is disposed between the inner surface 21b1 of the upstream fitting portion 21b and the outer surface 31a of the upstream cylindrical portion 31. The upstream seal member 60 is, for example, an ept sealant or the like disposed in a compressed state from the state of the two-dot chain line to the solid line state in FIG. 4, and is continuously provided and extends over the entire circumference.

[0023] As shown in FIG. 5, only one downstream end portion 22 is provided, and it is attached (connected, assembled) to a downstream cylindrical portion 41 of a downstream coupling member 40 described later. The downstream end portion 22 has a downstream enlarged portion 22a and a downstream fitting portion 22b that are continuously provided over the entire circumference.

[0024] The downstream-side enlarged portion 22a is a portion that continues from the downstream-side end of the connecting portion 23 and has an inner cross-sectional area that increases toward the downstream side. The downstream-side enlarged portion 22a extends from the connecting portion 23 and bends in a direction in which the inner cross-sectional area increases toward the downstream side, and is the portion until it bends at the tip of the extending direction and continues to the downstream-side fitting portion 22b. The downstream-side fitting portion 22b is a portion that continues from the downstream-side end of the downstream-side enlarged portion 22a and is externally fitted to the downstream-side cylindrical portion 41. The inner surface 22b1 of the downstream-side fitting portion 22b faces the outer surface 41a of the downstream-side cylindrical portion 41.

[0025] The downstream-side end portion 22 is attached to the downstream-side coupling member 40 by the downstream-side fitting portion 22b being continuously externally fitted to the downstream-side cylindrical portion 41 over the entire circumference (by the downstream-side fitting portion 22b covering the downstream-side cylindrical portion 41 from the outside over the entire circumference).

[0026] A downstream-side seal member 61 is disposed between the inner surface 22b1 of the downstream-side fitting portion 22b and the outer surface 41a of the downstream-side cylindrical portion 41. The downstream-side seal member 61 is, for example, an ept sealant or the like disposed in a compressed state from the state of the two-dot chain line to the solid line state in FIG. 5, and is provided to continuously extend over the entire circumference.

[0027] As shown in FIG. 2, only one connecting portion 23 is provided. The inner cross-sectional area of the connecting portion 23 may be constant over the entire area of the connecting portion 23, or may be indefinite, such as increasing or decreasing toward the downstream side.

[0028] As shown in FIG. 3, only one outward protruding portion 24 is provided. However, a plurality of outward protruding portions 24 may be provided in the extending direction of the duct 20. The outward protruding portion 24 protrudes from the connecting portion 23 to the outside (for example, upward) in the cross-sectional view of the duct 20. The outward protruding portion 24 is attached (connected, assembled) to an extending portion 51 of an intermediate portion coupling member 50 described later.

[0029] The upstream end portion 21, the downstream end portion 22, and the connecting portion 23 are integrally formed. The outward protruding portion 24 may be integrally formed with the upstream end portion 21, the downstream end portion 22, and the connecting portion 23, or may be separately formed and fixed.

[0030] The upstream coupling member 30 is not particularly limited, but for example, it is made of CFRP (Carbon Fiber Reinforced Plastics) and is, for example, the front bumper of the vehicle V. As shown in FIGS. 2 and 4, the upstream coupling member 30 has a cylindrical upstream cylindrical portion 31 that protrudes toward the downstream side (duct 20 side). The upstream cylindrical portion 31 is on the front surface of the vehicle V and has an opening 31b for taking in fluid. The cross-sectional area inside the upstream cylindrical portion 31 becomes smaller toward the downstream side. However, the cross-sectional area inside the upstream cylindrical portion 31 may become larger toward the downstream side, or may be constant throughout the entire upstream cylindrical portion 31. The fluid flowing inside the upstream cylindrical portion 31 flows from the inside of the upstream cylindrical portion 31 into the inside of the duct 20 in a direction parallel (including substantially parallel) to the vehicle front-rear direction, that is, a direction orthogonal (including substantially orthogonal) to the vehicle width direction.

[0031] The downstream coupling member 40 is not particularly limited, but for example, it is made of CFRP and is, for example, the inner cowl (which may also be called a wheel house) of the vehicle V. As shown in FIGS. 2 and 5, the downstream coupling member 40 has a cylindrical downstream cylindrical portion 41 that protrudes toward the upstream side (duct 20 side). The downstream cylindrical portion 41 has a discharge port 41b at the downstream end of the downstream cylindrical portion 41 for discharging fluid. The cross-sectional area inside the downstream cylindrical portion 41 is constant throughout the entire downstream cylindrical portion 41. However, the cross-sectional area inside the downstream cylindrical portion 41 may become larger or smaller toward the downstream side.

[0032] The fluid that has flowed inside the downstream cylindrical portion 41 flows out from the downstream cylindrical portion 41 to the rear of the vehicle and to the inside in the vehicle width direction (center side). This is to prevent the front tire 100 from being positioned on the extension of the downstream side in the fluid flow direction of the discharge port 41b, so as to prevent the fluid from hitting the front surface of the front tire 100 and applying resistance to the vehicle V, which would deteriorate the fuel efficiency of the vehicle V or degrade the acceleration performance of the vehicle V.

[0033] As shown by the arrow E in FIG. 2, the fluid (air, traveling wind) that has flowed into the inside of the upstream cylindrical portion 31 from the opening 31b of the upstream cylindrical portion 31 flows inside the upstream cylindrical portion 31, then flows from the inside of the upstream cylindrical portion 31 into the inside of the duct 20, and flows inside the duct 20. Then, after flowing inside the duct 20, it flows from the inside of the duct 20 into the inside of the downstream cylindrical portion 41 and flows inside the downstream cylindrical portion 41. The fluid that has flowed inside the downstream cylindrical portion 41 is discharged from the inside of the downstream cylindrical portion 41 through the discharge port 41b.

[0034] As described above, since the fluid that has flowed inside the upstream end portion 31 flows from the inside of the upstream end portion 31 into the inside of the duct 20 in a direction parallel to the vehicle longitudinal direction, and the fluid that has flowed inside the downstream cylindrical portion 41 flows out from the downstream cylindrical portion 41 to the rear of the vehicle and to the inside in the vehicle width direction, the duct 20 connecting the upstream cylindrical portion 31 and the downstream cylindrical portion 41 has two bent portions (which may also be referred to as curved portions) 23a in plan view in order to change the flow direction of the fluid flowing inside the duct 20, and has a substantially "S" shape. The fluid discharged from the inside of the downstream cylindrical portion 41 through the discharge port 41b has its flow direction changed to the outside in the vehicle width direction by the air deflector 70 disposed on the inside in the vehicle width direction of the front tire 100, and is guided to the front brake (not shown in detail) and used for cooling the front brake. The air deflector 70 is made of metal so as to withstand the impact caused by, for example, sand and stones being lifted by the front tire 100, and is fixed and attached to the chassis of the vehicle V.

[0035] The intermediate connecting member 50 is not particularly limited, but is, for example, made of resin such as PP or PE, and is a vehicle body part (body) made of, for example, another air guiding member different from the duct 20. The intermediate connecting member 50 may be a one-piece structure, or may be a two-piece structure composed of two connecting member elements 50a and 50b as shown in FIG. 3, or may be a multi-piece structure of three or more parts. The intermediate connecting member 50 has an extending portion 51 that extends in a direction approaching the outward protruding portion 24 of the duct 20. The outward protruding portion 24 is attached to the extending portion 51 using a clip 80 made of an elastically deformable resin, although it is not particularly limited. In this case, through holes are formed in the outward protruding portion 24 and the extending portion 51, respectively, and the outward protruding portion 24 is attached to the intermediate connecting member 50 by inserting the clip 80 into both through holes and engaging the edges of the respective through holes.

[0036] The method of attaching (connecting, assembling) the duct 20, the upstream connecting member 30, the downstream connecting member 40, and the intermediate connecting member 50 is as follows. (i) First, with the upstream seal member 60 and the downstream seal member 61 arranged on the duct 20, the outward protruding portion 24 of the duct 20 is attached to the extending portion 51 of the intermediate connecting member 50 using the clip 80. (ii) Next, the upstream connecting member 30 is brought close to the duct 20 from the front side of the vehicle, and the upstream end portion 21 of the duct 20 is externally fitted into the upstream cylindrical portion 31 of the upstream connecting member 30. At the same time, the downstream connecting member 40 is brought close to the duct 20 from the rear side of the vehicle, and the downstream end portion 22 of the duct 20 is externally fitted into the downstream cylindrical portion 41 of the downstream connecting member 40.

[0037] Next, the operation and effects of the embodiment of the present invention will be described. (A) The upstream end 21 of the duct 20 is attached to the upstream coupling member 30 by being continuously externally fitted over the entire circumference to the upstream cylindrical portion 31, and the downstream end 22 of the duct 20 is attached to the downstream coupling member 40 by being continuously externally fitted over the entire circumference to the downstream cylindrical portion 41. Therefore, both the upstream end 21 and the downstream end 22 of the duct 20 can have a structure of continuous fitting over the entire circumference (continuous external fitting structure over the entire circumference). Even when a load acts on the duct 20 during attachment (assembly) to the vehicle V or during vehicle travel, the duct 20 can be prevented from shifting with respect to the upstream coupling member 30 and the downstream coupling member 40. Thus, the air guiding performance by the duct 20 can be stably ensured.

[0038] (B) Since the upstream end 21 of the duct 20 has an upstream expanding portion 21a that continues to the connecting portion 23 and has an inner cross-sectional area that increases toward the upstream, and an upstream fitting portion 21b that continues to the upstream expanding portion 21a and is externally fitted to the upstream cylindrical portion 31, it is possible to suppress the formation of a step at the parting portion 90 (FIG. 4) between the connecting portion 23 of the duct 20 and the upstream cylindrical portion 31. Thus, it is possible to suppress the flow of the fluid flowing from the inside of the upstream cylindrical portion 31 into the inside of the duct 20 from being disturbed.

[0039] (C) Since an upstream seal member 60 that continuously extends over the entire circumference is disposed between the upstream fitting portion 21b and the upstream cylindrical portion 31, it is possible to suppress the upstream end 21 of the duct 20 from shifting (moving, rattling) with respect to the upstream cylindrical portion 31. More specifically, since the upstream seal member 60 that continuously extends over the entire circumference is disposed in a compressed state, it is possible to generate action and reaction forces among the upstream seal member 60, the upstream end 21, and the upstream cylindrical portion 31, and it is possible to suppress the upstream end 21 from shifting (moving, rattling) with respect to the upstream cylindrical portion 31. Also, it is possible to suppress the flow of fluid between the inner surface 21b1 of the upstream fitting portion 21b and the outer surface 31a of the upstream cylindrical portion 31.

[0040] (D) Since the upstream end portion 21 is attached to the upstream coupling member 30 by being continuously externally fitted over the entire circumference to the upstream cylindrical portion 31, compared to the case where the upstream end portion 21 is attached to the upstream coupling member 30 using fixtures such as bolts or clips, not only can cost reduction be achieved by reducing the number of parts, but also the work space required to attach the upstream end portion 21 to the upstream coupling member 30 can be made space-saving because the fastening work of the fixtures becomes unnecessary.

[0041] (E) Since the downstream end portion 22 of the duct 20 has a downstream enlarged portion 22a that continues to the connecting portion 23 and has an inner cross-sectional area that increases toward the downstream side, and a downstream fitting portion 22b that continues to the downstream enlarged portion 22a and is externally fitted to the downstream cylindrical portion 41, it is possible to suppress the formation of a step at the discontinuous portion 91 (FIG. 5) between the connecting portion 23 of the duct 20 and the downstream cylindrical portion 41. Therefore, it is possible to suppress the flow of the fluid flowing from the inside of the duct 20 to the inside of the downstream cylindrical portion 41 from being disturbed.

[0042] (F) Since a downstream seal member 61 that continuously extends over the entire circumference is disposed between the downstream fitting portion 22b and the downstream cylindrical portion 41, it is possible to suppress the downstream end portion 22 of the duct 20 from shifting (moving, rattling) with respect to the downstream cylindrical portion 41. More specifically, since the downstream seal member 61 that continuously extends over the entire circumference is disposed in a compressed state, it is possible to generate action and reaction forces between the downstream seal member 61, the downstream end portion 22, and the downstream cylindrical portion 41, and suppress the downstream end portion 22 from shifting (moving, rattling) with respect to the downstream cylindrical portion 41. Also, it is possible to suppress the fluid from flowing between the inner surface 22b1 of the downstream fitting portion 22b and the outer surface 41a of the downstream cylindrical portion 41.

[0043] (G) Since the downstream end portion 22 is attached to the downstream coupling member 40 by being continuously externally fitted over the entire circumference to the downstream cylindrical portion 41, compared to the case where the downstream end portion 22 is attached to the downstream coupling member 40 using a fixture such as a bolt or a clip, not only can cost reduction be achieved by reducing the number of parts, but also the work space required when attaching the downstream end portion 22 to the downstream coupling member 40 can be made space-saving because the fastening work of the fixture becomes unnecessary.

[0044] (H) Since it further has an intermediate coupling member 50 to which the outward protruding portion 24 of the duct 20 is attached, even when a load acts on the duct 20 during vehicle travel, the duct 20 can be effectively prevented from shifting with respect to the upstream coupling member 30 and the downstream coupling member 40.

[0045] (I) Since the outward protruding portion 24 of the duct 20 protrudes outward from the connecting portion 23 of the duct 20, the duct 20 can be attached to the intermediate coupling member 50 without affecting the inside of the duct 20 (without reducing the cross-sectional area (flow path cross-sectional area) inside the duct 20).

[0046] (J) Since the outward protruding portion 24 of the duct 20 is attached to the intermediate coupling member 50 using a clip 80, the outward protruding portion 24 can be attached to the intermediate coupling member 50 relatively simply and at low cost.

[0047] (K) Since the upstream end portion 21, the downstream end portion 22, and the connecting portion 23 of the duct 20 are integrally formed, unlike the case where the upstream end portion 21, the downstream end portion 22, and the connecting portion 23 of the duct 20 are composed of a plurality of parts (the duct 20 has a split duct structure), there is no possibility of displacement between the split parts, and the air guiding performance by the duct 20 can be stably ensured.

Description of Reference Numerals

[0048] 10 Vehicle front structure 20 Duct 21 Upstream end portion 21a Upstream enlarged portion 21b Upstream fitting part 21b1 Inner surface of the upstream fitting part 22 Downstream end 22a Downstream enlarged part 22b Downstream fitting part 22b1 Inner surface of the downstream fitting part 23 Connecting part 23a Bent part 24 Outer protruding part 30 Upstream coupling member 31 Upstream cylindrical part 31a Outer surface of the upstream cylindrical part 31b Opening 40 Downstream coupling member 41 Downstream cylindrical part 41a Outer surface of the downstream cylindrical part 41b Discharge port 50 Intermediate part coupling member 51 Extension part 60 Upstream seal member 61 Downstream seal member 70 Air guide plate 80 Clip 100 Front tire V Vehicle

Claims

1. A duct disposed at the front of a vehicle, having an upstream end, a downstream end, and a connecting portion connecting the upstream end and the downstream end; An upstream coupling member to which the upstream end of the duct is attached; A downstream coupling member to which the downstream end of the duct is attached; and having: The upstream coupling member has a cylindrical upstream cylindrical portion protruding downstream; The downstream coupling member has a cylindrical downstream cylindrical portion protruding upstream; Fluid flows from the inside of the upstream cylindrical portion through the inside of the duct to the inside of the downstream cylindrical portion; The upstream end of the duct is attached to the upstream coupling member by being continuously externally fitted around the entire circumference to the upstream cylindrical portion, and the downstream end of the duct is attached to the downstream coupling member by being continuously externally fitted around the entire circumference to the downstream cylindrical portion; The duct has an outward protruding portion protruding outward from the connecting portion to the outside of the duct, and further has an intermediate portion coupling member to which the outward protruding portion of the duct is attached. A vehicle front structure.

2. The upstream end of the duct has an upstream enlarged portion that continues to the connecting portion and has an inner cross-sectional area that increases toward the upstream, and an upstream fitting portion that continues to the upstream enlarged portion and is externally fitted to the upstream cylindrical portion. The vehicle front structure according to claim 1.

3. An upstream seal member that continuously extends over the entire circumference is disposed between the upstream fitting portion and the upstream cylindrical portion. The vehicle front structure according to claim 2.

4. The downstream end of the duct has a downstream enlarged portion that continues to the connecting portion and has an inner cross-sectional area that increases toward the downstream, and a downstream fitting portion that continues to the downstream enlarged portion and is externally fitted to the downstream cylindrical portion. The vehicle front structure according to claim 1.

5. A downstream seal member that continuously extends over the entire circumference is disposed between the downstream fitting portion and the downstream cylindrical portion. The vehicle front structure according to claim 4.

6. The upstream end, the downstream end, and the connecting portion of the duct are integrally formed. The vehicle front structure according to claim 1.

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