JP2017002735A - Duct structure for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive reuse without damaging a duct body even when a large load is imparted, for example.SOLUTION: An air intake duct 16 includes an upper wall 38a formed of a flexible material, a lower wall 38b confronting the upper wall 38a, and a pole 44 projecting toward the lower wall 38b from an intermediate portion in a width direction of the upper wall 38a, and is arranged between a bonnet hood 19 of a vehicle and a relay box 32 positioned below the bonnet hood 19. The relay box 32 has rigidity higher than that of the lower wall 38b and the pole 44, and a through hole 54 confronting a lower end 44a of the pole 44 is formed on the lower wall 38b so that a lower end portion 44b of the pole 44 can be inserted therethrough.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle duct structure disposed between a vehicle bonnet and vehicle body components.

  For example, Patent Document 1 discloses an upper first duct outer wall portion and a lower second duct outer wall portion that are disposed to face each other, and project from the second duct outer wall portion side to the first duct outer wall portion side. There is disclosed a vehicle duct having a support portion for supporting one duct outer wall portion from the inside. The support portion is provided with an impact receiving portion located between the bonnet and the vehicle body component. The impact receiving portion is provided with a fragile portion having a lower support strength than other portions of the support portion.

  In the vehicle duct disclosed in Patent Document 1, when an impact force due to a collision with a pedestrian is applied to the outer wall portion of the first duct via the bonnet, the impact receiving portion of the support portion is deformed in a crushed manner by the fragile portion. The bonnet is configured to allow a concave deformation.

Japanese Patent No. 4117547

  However, in the vehicle duct disclosed in Patent Document 1, when the bonnet is deformed by a pressing load, the lower second duct outer wall portion is deformed toward the upper first duct outer wall portion, and the tip of the support portion is There is a risk of damaging the first duct outer wall by abutting against the first duct outer wall.

  Further, by reusing the vehicle duct, unnecessary replacement with a new vehicle duct can be omitted. In the vehicle duct disclosed in Patent Document 1, when the first duct outer wall portion is damaged, it is difficult to reuse the vehicle duct.

  The present invention has been made in view of the above points. For example, even when a large load is applied, the vehicle duct structure can be reused without damaging the duct body. The purpose is to provide.

  In order to achieve the above object, the present invention provides an upper wall portion formed of a flexible material, a lower wall portion facing the upper wall portion, and an intermediate portion in the width direction of the upper wall portion. And a vehicle duct structure disposed between a vehicle bonnet and a vehicle body part positioned below the bonnet, wherein the vehicle body part includes the lower wall part. The lower wall portion is provided with a through hole through which the lower end portion of the protruding portion can be inserted so as to face the lower end of the protruding portion.

  According to the present invention, when the upper wall portion and the lower wall portion are deformed in a relatively close direction, the lower end of the projecting portion is displaced through the through hole, so that damage to the lower wall portion can be avoided. it can. Further, when a large load is applied to the upper wall portion from above the upper wall portion, the lower end of the projecting portion comes into contact with a vehicle body part having high rigidity through the through hole. Thereby, a deformation | transformation can be accept | permitted because a protrusion part bends. As a result, in the present invention, for example, even when a large load is applied, it is possible to avoid damaging the duct body including the upper wall portion and the lower wall portion. It can be easily reused simply by replacing it with a protrusion.

  In the present invention, the outer periphery of the projecting portion has a diameter-enlarging portion that expands radially outward, and the lower surface of the enlarged-diameter portion and the upper surface of the lower wall portion in the axial direction of the projecting portion. The dimension (L) of the gap formed therebetween is the dimension (M) between the lower end of the protruding portion and the lower surface of the lower wall portion forming the through hole, or the lower end of the protruding portion and the vehicle body It is characterized by being set smaller than the dimension (N) of the gap formed between the upper surfaces of the parts (L <M, L <N).

  According to the present invention, when the upper wall portion and the lower wall portion are deformed in a direction in which the upper wall portion and the lower wall portion are relatively close to each other, the enlarged diameter portion and the lower wall portion of the protruding portion come into contact with each other, thereby Can be suppressed.

  Furthermore, the present invention has an extending portion extending from the lower wall portion toward the enlarged diameter portion on the inner surface of the lower wall portion, and the lower surface of the enlarged diameter portion in the axial direction of the protruding portion. The dimension (A) of the gap formed between the upper end of the extension part is the dimension (B) between the lower end of the protruding part and the upper surface of the lower wall part forming the through hole, or It is characterized in that it is set smaller than the dimension (C) of the gap formed between the lower end of the protruding portion and the upper surface of the vehicle body part (A <B, A <C).

  According to the present invention, when the upper wall portion and the lower wall portion are deformed in a relatively close direction, first, the enlarged-diameter portion of the protruding portion and the extended portion of the lower wall portion come into contact with each other. In addition, when a large load is applied to the upper wall portion from above the upper wall portion, the enlarged diameter portion or the extending portion is deformed, and the lower end of the protruding portion is a vehicle body part having high rigidity through the through hole. Abut. Thereby, a deformation | transformation can be accept | permitted because a protrusion part bends. As a result, in the present invention, for example, even when a large load is applied, it is possible to avoid damaging the duct body including the upper wall portion and the lower wall portion. It can be easily reused simply by replacing it with a protrusion.

  Furthermore, the present invention provides an upper wall portion made of a flexible material, a lower wall portion that faces the upper wall portion, and a width direction intermediate portion of the upper wall portion that protrudes toward the lower wall portion. A vehicle duct structure disposed between a vehicle bonnet and a vehicle body part positioned below the bonnet, wherein an outer periphery of the protrusion is expanded radially outwardly. A diameter portion, and an inner surface of the lower wall portion has an extending portion extending from the lower wall portion toward the enlarged diameter portion, and the lower surface of the enlarged diameter portion in the axial direction of the protruding portion. And the dimension (S) of the gap formed between the upper end of the extending part and the upper end of the extension part are set smaller than the dimension (T) between the lower end of the projecting part and the upper surface of the lower wall part (S). <T).

  According to the present invention, when the upper wall portion and the lower wall portion are deformed in a relatively close direction, the enlarged diameter portion of the protruding portion and the extended portion of the lower wall portion come into contact with each other, thereby Contact between the lower end and the lower wall portion can be suppressed.

  Still further, in the present invention, the vehicle body part is formed to be higher in rigidity than the lower wall portion and the protruding portion, and the lower wall portion has a lower end portion of the protruding portion facing the lower end of the protruding portion. Is provided, and the dimension (A) of the gap formed between the lower surface of the enlarged diameter portion and the upper end of the extending portion in the axial direction of the protruding portion is the lower end of the protruding portion. And a dimension (C) of a gap formed between the upper surface of the vehicle body part and the upper surface of the vehicle body part.

  According to the present invention, when the upper wall portion and the lower wall portion are deformed in a relatively close direction, first, the enlarged-diameter portion of the protruding portion and the extended portion of the lower wall portion come into contact with each other. Further, when a large load is applied to the upper wall portion from above the upper wall portion, the enlarged diameter portion or the extending portion is deformed, and the lower end of the protruding portion penetrates the through hole and has high rigidity. Abut against the part. Thereby, a deformation | transformation can be accept | permitted because a protrusion part bends. As a result, in the present invention, for example, even when a large load is applied, it is possible to avoid damaging the duct body including the upper wall portion and the lower wall portion. It can be easily reused simply by replacing it with a protrusion.

  Furthermore, the present invention is characterized in that the enlarged diameter portion is provided over substantially the entire circumference of the outer periphery of the protruding portion, and the extended portion is provided in a substantially cylindrical shape so as to contact the enlarged diameter portion. And

  According to the present invention, the enlarged diameter portion is provided over substantially the entire circumference of the outer periphery of the protruding portion, so that when the extending portion comes into contact with the enlarged diameter portion, the load is applied intensively to a part. The load can be applied substantially uniformly.

  Furthermore, the present invention provides an upper wall portion formed of a flexible material, a lower wall portion facing the upper wall portion, and an intermediate portion in the width direction of the upper wall portion toward the lower wall portion. A vehicle duct structure disposed between a hood of a vehicle and a vehicle body part positioned below the hood, wherein the vehicle body part is more than the lower wall part and the protrusion part. The lower wall portion is formed with high rigidity, the lower end portion of the protruding portion passes through the lower wall portion so as to face the lower end of the protruding portion, and the lower end of the protruding portion is slidable along the upper surface of the body part. A notch is provided.

  According to the present invention, when a large load is applied to the upper wall portion from above the upper wall portion, the lower end of the projecting portion abuts against the vehicle body part having high rigidity penetrating the notch portion. Subsequently, the lower end portion of the protruding portion slides along the notch portion, and the lower end of the protruding portion slides along the upper surface of the vehicle body part. As a result, in the present invention, for example, even when a large load is applied, it is possible to avoid damaging the duct body including the upper wall portion and the lower wall portion. It can be easily reused simply by replacing it with a protrusion.

  In the present invention, for example, it is possible to obtain a vehicle duct structure that can be reused without damaging the duct body even when a large load is applied.

It is a top view of the vehicle body front part to which the duct structure for vehicles concerning the embodiment of the present invention was applied. FIG. 2 is an enlarged longitudinal sectional view taken along line II-II in FIG. 1. It is a perspective view of the air intake duct shown in FIG. (A) is a partially enlarged longitudinal sectional view of FIG. 2, (b) is an enlarged transverse sectional view taken along line IV-IV of (a), and (c) is a partially enlarged view of a portion D shown in (a). It is a longitudinal cross-sectional view. (A) is a normal state, (b) is a maximum air flow rate state, (c), (d) is a pole displacement state when a load is applied to the upper wall portion of the intake duct. It is a partial expanded sectional view. It is a perspective view of the air intake duct which concerns on other embodiment of this invention. FIG. 7 is a partial enlarged cross-sectional view showing a state where the lower end portion of the pole slides along the notch portion in the intake duct shown in FIG. 6. (A)-(c) is a longitudinal cross-sectional view of the pole arrange | positioned between an upper wall part and a lower wall part in the intake duct which concerns on further another embodiment of this invention. (A)-(c) is the longitudinal section of the pole arrange | positioned between the upper wall part, the lower wall part, and the upper wall part and the lower wall part in the intake duct which concerns on further another embodiment of this invention. FIG.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In each figure, “front and rear” and “up and down” indicate the vehicle longitudinal direction and the vehicle vertical direction (vertical vertical direction), respectively, and “left and right” indicate the left and right direction (vehicle width direction) viewed from the driver's seat, respectively. Show.

  As shown in FIG. 1, the engine E is mounted horizontally in the engine room 12 of the vehicle body front portion 10. On the upper left side of the engine E, an air cleaner 14 in which an air filter (not shown) is accommodated is disposed. An intake duct (vehicle duct) 16 that functions as an air suction portion is connected to the upstream side of the air cleaner 14, and the intake duct 16 is fixed to a vehicle body side member 18 on the left side constituting the engine room 12. .

  As shown in FIG. 2, the upper part of the engine room 12 is covered with a hood hood (bonnet) 19. The bonnet hood 19 includes an outer hood outer 19a, an inner hood inner 19b, and a hood frame 21 provided between the hood outer 19a and the hood inner 19b. In FIG. 2, a thick two-dot chain line P indicates a pedestrian protection plane set by the applicant.

  The intake duct 16 has an intake port 20 (see FIG. 3) that is wide toward the vehicle body side member 18 and opens in a substantially rectangular shape when viewed from the vehicle body side. Connected to the downstream side of the air cleaner 14 is one end of an air pipe 22 that extends in the vehicle width direction and introduces air sucked from the intake duct 16 (intake intake 20) into the engine E. The other end of the air pipe 22 is connected to an intake manifold (not shown) of the engine E via a joint pipe 24.

  A rectangular parallelepiped battery 30 is arranged between the vehicle body front member 28 constituting the engine room 12 and the intake duct 16. As shown in FIG. 2, a relay box (vehicle body part) 32 is disposed below the intake duct 16. That is, the intake duct 16 is disposed between the hood hood 19 and the relay box 32 positioned below the hood hood 19 in the vertical direction.

  As shown in FIG. 2, the relay box 32 includes a box body 33 having a bottomed rectangular tube shape and having a substantially rectangular opening at the top, and a lid member 34 that closes the opening of the box body 33. A plurality of relay switches and the like are accommodated in the relay box 32.

  In the present embodiment, the relay box 32 is described as an example of the vehicle body part located below the intake duct 16 (intake intake 20), but is not limited to the relay box 32. For example, The battery 30 or a frame may be used.

  As shown in FIGS. 2 and 3, the intake duct 16 has an intake duct body 36. The intake duct body 36 is integrally formed of a flexible soft member. As the soft member, for example, EPDM (ethylene propylene diene monomer copolymer) is preferable. It is because it is excellent in weather resistance and cold resistance.

  The intake duct body 36 is formed by integrally molding an upper wall portion 38a and a lower wall portion 38b that are made of a flexible material and face each other. As shown in FIG. 2, a part of the intake duct 16 including the upper wall portion 38 a is arranged so as to protrude upward from the pedestrian protection surface P. For this reason, in this embodiment, the part which protrudes from the pedestrian protection surface P is formed with a soft member, and it copes with pedestrian protection.

  In the present embodiment, both the upper wall portion 38a and the lower wall portion 38b are formed of a flexible soft member (EPDM). The wall portion 38a may be formed of a soft member, and the other lower wall portion 38b may be integrally formed of a hard member.

  The box main body 33 and the lid member 34 constituting the relay box 32 are made of PPT (polypropylene terephthalate) resin containing talc. The relay box 32 is made of PPT resin containing a predetermined amount of talc, so that the rigidity is higher than that of the lower wall portion 38b of the intake duct 16 and a pole 44 described later.

  An annular connection portion 40 connected to the cylindrical portion 14 a of the air cleaner 14 is provided at the inner end in the vehicle width direction of the intake duct body 36. A rectangular opening 42 having an intake port 20 is provided at the outer end in the vehicle width direction of the intake duct main body 36 on the side opposite to the annular connecting portion 40. The vehicle width direction outer side end portion is located on the upstream side of the air flow path, and the vehicle width direction inner end portion is located on the downstream side of the air flow path. The intake duct body 36 as a whole is formed in a substantially funnel shape in which the opening area gradually increases from the annular connecting portion 40 side toward the rectangular opening portion 42 side. In the present embodiment, the intake duct 20 of the intake duct 16 is arranged so as to open toward the left side in the vehicle width direction (see FIG. 1), but in relation to the layout in the engine room 12, for example, The intake duct 16 may be disposed so as to open toward the front of the vehicle.

  A holding groove 46 that holds the upper end of a pole (projecting portion) 44 to be described later is formed in the upper center portion of the rectangular opening 42. The “upper center portion” refers to the center in the width direction (vehicle longitudinal direction) of the opening formed by the rectangular opening 42. The pole 44 is detachably attached to the holding groove 46. The holding groove 46 has a substantially T-shaped opening when viewed from the left side in the vehicle width direction, and has a substantially rectangular space disposed on the inlet side of the holding groove 46 in plan view from above, and the rear of the holding groove 46. It is formed in a composite shape in which a substantially circular space portion arranged on the portion side and continuing to a substantially rectangular space portion is coupled. The width dimension of the substantially rectangular space part and the inner diameter dimension of the substantially circular space part are set smaller than the outer diameter of the pole 44 described later.

  Further, the intake duct 16 projects by a predetermined length from the lower wall portion toward the vehicle body side member 18 side, and extends in a belt shape along the vehicle front-rear direction, and the vehicle rear side of the intermediate portion 48 And a mounting portion 52 that is fixed to the upper portion of the vehicle body side member 18 via a bolt (not shown). The intermediate part 48 is formed so as to extend toward the upstream side of the air flow path. The intermediate portion 48 is formed to extend outward from the opening formed by the rectangular opening 42.

  A through hole through which the lower end 44b of the pole 44 can be inserted and opposed to the lower end 44a of the pole 44 at the center of the rectangular opening 42 at the boundary between the lower wall portion 38b and the intermediate portion 48 of the intake duct 16 54 is formed. As shown in FIG. 4, the through hole 54 is positioned substantially vertically below the holding groove 46. The inner diameter of the through hole 54 is set larger than the outer diameter of the lower end portion 44 b of the pole 44. The outer diameter surface of the lower end 44 b of the pole 44 is provided so as to have a clearance with the inner diameter surface of the through hole 54. As a result, the lower end portion 44b of the pole 44 is not supported by the through hole 54, and is loosely fitted in the through hole 54 via a clearance.

  The lower wall portion 38 b is provided with an extending portion 60 that extends upward from the upper surface of the lower wall portion 38 b forming the through hole 54 toward the enlarged diameter portion 58 of the pole 44 described later. The extending portion 60 has a substantially cylindrical shape, and a part of the side facing the vehicle body side member 18 is cut out in an arc shape (see FIG. 3). By providing the extending portion 60 on the lower wall portion 38b, for example, when the upper wall portion 38a is deformed along the vertical direction, a retaining function for preventing the lower end portion 44b of the pole 44 from coming out of the through hole 54 is provided. It can be demonstrated.

  On the inner wall of the extending portion 60, three hemispherical protrusions 56 are formed that are in point contact with the outer peripheral surface of the pole 44 and center the pole 44. As shown in FIG. 4B, the three hemispherical protrusions 56 have the same height dimension and are spaced apart at equal angles along the circumferential direction. Each hemispherical protrusion 56 is formed so as to protrude inward in the radial direction of the extension 60.

  When the lower end 44a of the pole 44 supported in the holding groove 46 of the upper wall portion 38a is inserted into the through hole 54, the lower end 44a of the pole 44 is slid along the notch of the extending portion 60, thereby The lower end 44 a of 44 can be easily inserted into the through hole 54. In addition, the extending part 60 may be formed over the entire circumference without cutting out a part of the side facing the vehicle body side member 18. In the present embodiment, the extending portion 60 is formed in a substantially cylindrical shape. However, the present invention is not limited to this. For example, the extending portion 60 is erected along the vertical direction and spaced apart by a predetermined interval in the circumferential direction. You may make it comprise with several vertical wall arrange | positioned.

  Further, on the lower surface of the lower wall portion 38b, three support points 66 that contact the upper surface of the lid member 34 of the relay box 32 are provided. The support point 66 is substantially hemispherical when viewed from the bottom, and the intake duct 16 is supported at three points on the upper surface of the lid member 34 so that it is stably supported without being affected by manufacturing errors. Can do.

  The intermediate portion 48 is provided with a plurality of ridge portions 62 that protrude upward from the upper surface of the intermediate portion 48 and extend from the attachment portion 52 side toward the intake intake port 20 side. The protrusion 62 plays the role of a rib, and is installed along the direction in which air flows so as to ensure rigidity of the intermediate portion 48 and not obstruct air intake from the intake intake 20. The pair of protrusions 62 and 62 located at the center of the rectangular opening 42 are formed continuously with the extension 60. The “center” refers to the center in the width direction (vehicle longitudinal direction) of the opening formed by the rectangular opening 42.

  As shown in FIG. 2, it protrudes from the upper wall portion 38a toward the lower wall portion 38b (through hole 54) at the middle portion in the width direction of the upper wall portion 38a and at the approximate center of the vicinity of the inlet of the intake port 20. A pole 44 is provided.

  As shown in FIGS. 4A and 4C, the pole 44 is formed of a bottomed cylindrical body and is integrally formed of PP (polypropylene) resin. The pole 44 includes a cylindrical portion 45 having a constant outer diameter, and a large-diameter disk portion mounted in a holding groove 46 formed on the upper wall portion 38a of the intake duct 16 provided on the upper portion of the cylindrical portion 45. 47 and a small-diameter disk portion 49 that is located below the large-diameter disk portion 47 and is formed with a diameter smaller than that of the large-diameter cylindrical portion 47.

  On the outer periphery on the lower side of the pole 44, a diameter-expanding portion 58 that increases in diameter radially outward is provided. As will be described later, when the upper wall portion 38a of the intake duct 16 is bent by the negative pressure action of the intake air sucked from the intake air intake 20 and approaches the lower wall portion 38b, the enlarged diameter portion 58 of the pole 44 is It is provided so as to come into contact with the extending portion 60 of the wall portion 38b (see FIG. 5B described later).

  In the cylindrical portion 45 above the enlarged diameter portion 58, annular stepped portions 64 having different inner diameters and different thicknesses of the cylindrical portion 45 are formed. The annular stepped portion 64 is formed at a boundary portion between the upper cylindrical portion 45 formed to be thick with a small inner diameter and the lower cylindrical portion 45 formed to be thin with a large inner diameter. The annular step portion 64 functions as a fragile portion that becomes a starting point of deformation when a large impact load is applied to the pole 44.

  In the present embodiment, the annular stepped portion 64 is formed by making the outer diameter of the cylindrical portion 45 constant and making the inner diameter different, but on the other hand, the inner diameter of the cylindrical portion 45 is made constant and the outer diameter is made constant. It is also possible to form an annular stepped portion by making the diameter different. However, when the annular step portion is provided with the outer diameter of the cylindrical portion 45 having a different diameter, the flow rate changes due to the flow area through which the intake air circulates and abnormal noise may occur.

  As shown in FIGS. 4A and 4C, the dimension (A) of the gap formed between the lower surface of the enlarged diameter portion 58 and the upper end of the extension portion 60 in the axial direction of the pole 44 is as follows. Dimension (B) between the lower end 44a of 44 and the lower surface of the lower wall portion 38b forming the through hole 54, or between the lower end 44a of the pole 44 and the upper surface of the relay box 32 (lid member 34). It is set smaller than the dimension (C) of the gap (A <B, A <C).

  In the present embodiment, the holding groove 46 is formed in the upper wall portion 38a of the intake duct 16 and the through hole 54 is formed in the lower wall portion 38b. However, the through hole 54 is turned upside down in the upper wall portion 38a. And a holding groove 46 for holding the pole 44 may be formed in the lower wall portion 38b.

  The vehicle front portion 10 to which the vehicle duct structure according to the present embodiment is applied is basically configured as described above. Next, its operation and effects will be described.

  5A shows a normal state, FIG. 5B shows a maximum air flow rate, and FIGS. 5C and 5D show a case where a load is applied to the upper wall portion of the intake duct. It is a partial expanded sectional view which shows the displacement state of each pole.

  FIG. 5A shows a normal state in which intake air is sucked from the intake port 20 of the intake duct 16. In this normal state, the upper wall portion 38a does not bend toward the lower wall portion 38b, and the enlarged diameter portion 58 of the pole 44 is not in contact with the extending portion 60 of the lower wall portion 38b. .

  FIG. 5B shows a state in which the flow rate of the intake air drawn from the intake port 20 of the intake duct 16 is maximized. In the maximum air flow rate state, the upper wall portion 38a is slightly bent and deformed toward the lower wall portion 38b, and the enlarged diameter portion 58 of the pole 44 contacts the extending portion 60 of the lower wall portion 38b. In this case, the lower end 44 a of the pole 44 does not contact the upper surface of the relay box 32. A clearance is formed between the lower end 44 a of the pole 44 and the upper surface of the relay box 32.

  In the present embodiment, since the pole 44 functions as a support rod and the upper wall portion 38a is prevented from being bent and deformed with respect to the lower wall portion 38b, the intake intake port 20 is caused by negative pressure when air is sucked from the intake port 20. Deformation can be limited. Further, in the present embodiment, when the upper wall portion 38a and the lower wall portion 38b are deformed in a relatively close direction, first, the enlarged diameter portion 58 of the pole 44 and the extended portion 60 of the lower wall portion 38b are formed. By abutting, it is possible to preferably avoid damaging the upper surface of the lower wall portion 38b.

  As shown in FIGS. 4A and 4C, in the normal state, the dimension of the gap formed between the lower surface of the enlarged diameter portion 58 and the upper end of the extending portion 60 in the axial direction of the pole 44 (A ) Is set smaller than the dimension (C) of the gap formed between the lower end 44a of the pole 44 and the upper surface of the relay box 32 (lid member 34) (A <C). Further, in the present embodiment, when the enlarged diameter portion 58 of the pole 44 and the extended portion 60 of the lower wall portion 38 b come into contact with each other, the lower surface of the enlarged diameter portion 58 and the upper end of the extended portion 60 in the axial direction of the pole 44. Is set to be smaller than the dimension (B) between the lower end 44a of the pole 44 and the lower surface of the lower wall portion 38b forming the through hole 54 (B). A <B), the lower end 44a of the pole 44 is provided so as not to protrude from the lower surface of the lower wall portion 38b. In short, in either the normal state of FIG. 5A or the state of FIG. 5B in which the lower surface of the enlarged diameter portion 58 and the upper end of the extension portion 60 are in contact with each other, The length from the upper end of the protruding portion 60 to the lower surface of the lower wall portion 38 b is set to be larger than the length from the lower surface of the enlarged diameter portion 58 to the lower end 44 a of the pole 44.

  In addition, when the support point 66 is not provided in the lower surface of the lower wall part 38b, the clearance between the lower surface of the lower wall part 38b and the upper surface of the relay box 32 (lid member 34) becomes substantially zero or zero. Thus, even if the clearance between the lower wall portion 38b and the relay box 32 is substantially zero or zero, in this embodiment, the lower surface of the enlarged diameter portion 58 and the extension portion 60 in the axial direction of the pole 44 are used. The dimension (A) of the gap formed between the upper end and the upper end is set smaller than the dimension (B) between the lower end 44a of the pole 44 and the lower surface of the lower wall portion 38b that forms the through hole 54. (A <B), the lower end 44a of the pole 44 does not contact the upper surface of the relay box 32 (lid member 34).

  FIG. 5C shows that, for example, when the operator applies a pressing load F1 such as placing a hand on the upper wall portion 38a of the intake duct 16, the upper wall portion 38a of the intake duct 16 is moved by the pressing load F1. A deformed state is shown. When the upper wall portion 38a of the intake duct 16 is deformed by hand due to the pressing load F1 of the operator, the extended portion 60 formed of a soft member is further pressed downward from the state shown in FIG. 5B. Is deformed, and the lower end 44a of the pole 44 comes into contact with the upper surface of the lid member 34 of the relay box 32. Since the relay box 32 (lid member 34) is formed of a member having higher rigidity than the lower wall portion 38b and the pole 44 as described above, the pressing load F1 applied to the pole 44 is received by the relay box 32 ( Absorbed). In the present embodiment, for example, even when a pressing load F1 that is about the hand pressing load is applied, it is possible to avoid the bending of the pole 44. In addition, the thickness along the radial direction of the extending portion 60 is formed thinner than the thickness along the vertical direction of the lower wall portion. Thereby, for example, when the pressing load F1 about the hand pressing load is applied, the extension portion 60 itself can be bent while being prevented from being damaged.

  FIG. 5D shows a deformed state of the pole 44 when an impact load F2 larger than the pressing load F1 caused by the operator's hand is applied to the upper wall portion 38a of the intake duct 16 (F1 <F2). ing. While the lower end 44a of the pole 44 is in contact with the upper surface of the lid member 34 of the relay box 32, the stress of the impact load F2 is concentrated on the annular stepped portion 64 formed substantially at the center in the axial direction of the pole 44. Since the portion 64 functions as a fragile portion, the pole 44 bends in a substantially U-shaped cross section. Thus, in the present embodiment, the deformation of the pole 44 is allowed starting from the annular stepped portion 64, so that the impact load F2 can be suitably received (absorbed).

  In the present embodiment, when the upper wall portion 38a and the lower wall portion 38b are deformed in a direction in which they are relatively close to each other, the lower end 44a of the pole 44 is inserted through the through hole 54, thereby avoiding damage to the lower wall portion 38b. be able to. In the present embodiment, when a large impact load F2 is applied to the upper wall portion 38a from above the upper wall portion 38a, the lower end 44a of the pole 44 penetrates the through hole 54 and has high rigidity. It contacts the box 32. Thereby, the deformation | transformation is accept | permitted because the pole 44 bends in a substantially square shape. As a result, in this embodiment, for example, even when a large impact load F2 is applied, the intake duct main body 36 including the upper wall portion 38a and the lower wall portion 38b is prevented from being damaged, so that it is bent. The intake duct 16 can be easily reused by replacing only the pole 44 with a new pole 44.

  Furthermore, in the present embodiment, the enlarged diameter portion 58 is formed of an annular body that extends over the entire circumference of the pole 44, so that when the extension portion 60 comes into contact with the enlarged diameter portion 58, the load is partially applied Therefore, the load can be applied substantially uniformly in the circumferential direction.

  Next, an intake duct 16a according to another embodiment of the present invention will be described. FIG. 6 is a perspective view of an intake duct according to another embodiment, and FIG. 7 is a partially enlarged cross-sectional view showing a state in which the lower end of the pole slides along the notch in the intake duct shown in FIG. In the embodiment described below, the same components as those of the intake duct 16 shown in FIG. 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the intake duct 16a according to another embodiment, the pole 44 is not formed with the enlarged diameter portion 58, the pole 44 is held in a tilted state in the normal state of the intake air, and the upper surface and the lower surface of the intermediate portion 48 Are different in that a notch portion 70 is provided. The notch portion 70 extends along a set of protrusions 62 from the boundary portion between the lower wall portion 38b and the intermediate portion 48 toward the vehicle body side member 18 side. Moreover, the notch part 70 is formed so that it may extend toward the upstream of an air flow path. The intermediate portion 48 is formed to extend outward from the opening formed by the rectangular opening 42.

  The lower wall portion 38 b includes an inclined surface portion 74 having an inclined surface 72 that contacts the lower end portion 44 b of the pole 44 and tilts the pole 44 downwardly from the upper wall portion 38 a toward the intermediate portion 48. The inclined surface 72 is formed so as to incline from the downstream side of the air flow path toward the upstream side. Further, the inclined surface 72 is formed so as to incline and fall outward from the opening formed by the rectangular opening 42. Below the inclined surface portion 74, a lower end support portion 76 that protrudes continuously from the inclined surface portion 74 and supports the lower end 44 a of the pole 44 is provided. Further, as shown in FIG. 6, a pair of elastic claws 78, 78 are provided continuously at both ends along the circumferential direction of the inclined surface portion 74 so as to be opposed to each other and spaced apart from each other by a predetermined distance. It has been. Furthermore, the inclined surface portion 74 supports the air flow downstream side of the lower end portion 44 b of the pole 44, and the elastic claw portions 78 and 78 face the inclined surface portion 74 and the air flow upstream side of the lower end portion 44 b of the pole 44. Is urged and supported toward the inclined surface 72. The inclined surface 72 of the inclined surface portion 74 is not positioned substantially vertically below the holding groove 46, and is disposed on the left side in the vehicle width direction with respect to the inner portion of the holding groove 46.

  The pair of elastic claw portions 78 and 78 are provided at a portion facing the inclined surface 72 of the inclined surface portion 74, and elastically hold the outer peripheral surface of the pole 44 by its elastic force. Further, in the normal state of intake air, the lower end portion 44b of the pole 44 is held on the inclined surface portion 74 by the flow of intake air sucked from the intake port 20 (see FIG. 7).

  As shown in FIG. 7, for example, when an impact load F2 larger than the pressing load F1 caused by the operator's hand is applied to the upper wall portion 38a of the intake duct 16a (F1 <F2), the lower end of the pole 44 44 a slides downward from the lower end support portion 76, passes through the notch portion 70, and contacts the upper surface of the lid member 34 of the relay box 32.

  Subsequently, as shown by a two-dot chain line in FIG. 7, the pole 44 slides in a direction in which the lower end 44 a of the pole 44 is separated from the inclined surface portion 74 along the upper surface of the lid member 34 while maintaining the inclined state. Dynamic displacement. Thus, in this embodiment, the impact load F2 can be suitably received (absorbed) by sliding along the notch 70 through which the lower end 44b of the pole 44 passes. As a result, in the present embodiment, for example, even when a large impact load F2 is applied, the intake duct body 36 including the upper wall portion 38a and the lower wall portion 38b is prevented from being damaged. The duct 16a can be reused.

  Next, an intake duct 16b according to still another embodiment of the present invention will be described. FIGS. 8A to 8C are longitudinal sectional views of poles arranged between an upper wall portion and a lower wall portion in an intake duct according to still another embodiment of the present invention.

  In yet another embodiment, the lower wall portion 38 b is not provided with the extending portion 60 protruding toward the upper wall portion 38 a, and the upper surface of the lower wall portion 38 b in the vicinity of the through hole 54 is formed by the flat surface 80. Is different in that it is. Correspondingly, the position of the enlarged diameter portion 58 in the vertical direction is shifted to the position closer to the lower end 44a of the pole 44 compared to the position of the enlarged diameter portion 58 shown in FIG. Is provided.

  FIG. 8A shows a normal state in which intake air is sucked from the intake port 20 of the intake duct 16b. In this normal state, the upper wall portion 38a does not bend toward the lower wall portion 38b, and the enlarged diameter portion 58 of the pole 44 is not in contact with the flat surface 80 of the lower wall portion 38b.

  FIG. 8B shows a state in which the flow rate of the intake air drawn from the intake intake 20 of the intake duct 16b is maximized. In the maximum air flow rate state, the upper wall portion 38a is slightly bent and deformed toward the lower wall portion 38b, and the enlarged diameter portion 58 of the pole 44 abuts against the flat surface 80 of the lower wall portion 38b. As a result, deformation of the intake air intake 20 due to negative pressure when air is sucked from the intake air intake 20 can be limited.

  Further, as shown in FIG. 8B, when the enlarged diameter portion 58 of the pole 44 comes into contact with the flat surface 80 that is the upper surface of the lower wall portion 38 b, the lower end 44 a of the pole 44 is the lid of the relay box 32. It is provided so as not to contact the upper surface of the member 34. As shown in FIG. 8A, the dimension (L) of the gap formed between the lower surface of the enlarged diameter portion 58 and the upper surface of the lower wall portion 38b in the axial direction of the pole 44 is such that the pole 44 This is because it is set to be smaller than the dimension (N) of the gap formed between the lower end 44a and the upper surface of the relay box 32 (L <N). Similarly, the dimension (L) of the gap formed between the lower surface of the enlarged diameter portion 58 and the upper surface of the lower wall portion 38b in the axial direction of the pole 44 is lower than the lower end 44a of the pole 44 and the through hole 54. It is set smaller than the dimension (M) between the lower surface of the wall part 38b (L <M).

  FIG. 8C shows that, for example, when the operator applies a pressing load F1 such as placing a hand on the upper wall portion 38a of the intake duct 16b, the upper wall portion 38a of the intake duct 16b is moved by the pressing load F1. A deformed state is shown. When the upper wall portion 38a of the intake duct 16b is deformed by hand due to the operator's pressing load F1, the lower wall portion 38b formed of a soft member is pressed further downward from the state shown in FIG. 8B. Is deformed, and the lower end 44a of the pole 44 comes into contact with the upper surface of the lid member 34 of the relay box 32. When the impact load F2 is applied, the pole 44 bends and deforms in a substantially square shape starting from the annular stepped portion 64 that functions as the fragile portion, as in FIG. 5 (d).

  Next, an intake duct 16c according to still another embodiment of the present invention will be described. FIG. 9A to FIG. 9C are arranged in an intake duct according to still another embodiment of the present invention, between an upper wall portion, a lower wall portion, and an upper wall portion and a lower wall portion. FIG.

  In the intake duct 16c according to still another embodiment, the through hole 54 is not formed in the lower wall portion 38b, and the lower side on the inner diameter side of the extending portion 60 is blocked by the meat portion of the lower wall portion 38b. And different from the intake ducts 16, 16a, 16b described above.

  FIG. 9A shows a normal state in which intake air is sucked from the intake port 20 of the intake duct 16c. In this normal state, the upper wall portion 38a does not bend toward the lower wall portion 38b, and the enlarged diameter portion 58 of the pole 44 is not in contact with the extending portion 60 of the lower wall portion 38b. .

  FIG. 9B shows a state in which the flow rate of the intake air drawn from the intake port 20 of the intake duct 16c is maximized. In the maximum air flow rate state, the upper wall portion 38a is slightly bent and deformed toward the lower wall portion 38b, and the enlarged diameter portion 58 of the pole 44 contacts the extending portion 60 of the lower wall portion 38b. As a result, deformation of the intake air intake 20 due to negative pressure when air is sucked from the intake air intake 20 can be limited.

  Further, as shown in FIG. 9B, when the enlarged diameter portion 58 of the pole 44 comes into contact with the upper end of the extended portion 60 of the lower wall portion 38b, the lower end 44a of the pole 44 is formed on the lower wall portion 38b. It is provided so as not to contact the upper surface. A clearance is formed between the lower end 44a of the pole 44 and the upper surface of the lower wall portion 38b. As shown in FIG. 9 (a), the intake duct 16c has a dimension (S) formed between the lower surface of the enlarged diameter portion 58 and the upper end of the extended portion 60 in the axial direction of the pole 44. ) Is set smaller than the dimension (T) between the lower end 44a of the pole 44 and the upper surface of the lower wall portion 38b (S <T). In short, in the state of FIG. 9B in which the lower surface of the enlarged diameter portion 58 and the upper end of the extending portion 60 are in contact with each other, the length from the upper end of the extending portion 60 to the upper surface of the lower wall portion 38b is The length from the lower surface of the enlarged diameter portion 58 to the lower end 44a of the pole 44 is set to be larger.

  In FIG. 9C, for example, when the operator applies a pressing load F1 such as putting his hand on the upper wall portion 38a of the intake duct 16c, the upper wall portion 38a of the intake duct 16c is caused by the pressing load F1. A deformed state is shown. When the upper wall portion 38a of the intake duct 16c is deformed by hand due to the operator's pressing load F1, the extended portion 60 formed of a soft member is pressed further downward from the state shown in FIG. 9B. Is deformed, and the lower end 44a of the pole 44 comes into contact with the upper surface of the lower wall portion 38b located on the back side of the extending portion 60. When the impact load F2 is applied, the pole 44 bends and deforms in a substantially square shape starting from the annular stepped portion 64 that functions as the fragile portion, as in FIG. 5 (d).

  In the intake duct 16c, when the upper wall portion 38a and the lower wall portion 38b are deformed in a relatively close direction, first, the enlarged diameter portion 58 of the pole 44 and the extending portion 60 of the lower wall portion 38b abut against each other. The contact between the lower end 44a of the pole 44 and the lower wall portion 38b is suppressed. In the present embodiment, even when the lower end 44a of the pole 44 is in contact with the upper surface of the lower wall portion 38b, the enlarged diameter portion 58 and the extension portion 60 are in contact with each other, so that the upper wall portion 38a is viewed from above. A load (impact) applied to the upper wall portion 38a is buffered. For this reason, in this embodiment, damage to the pole 44 and the lower wall portion 38b can be avoided, and the intake duct 16c can be reused.

16, 16a, 16b, 16c Intake duct 19 Bonnet hood (bonnet)
32 Relay box (body parts)
38a Upper wall part 38b Lower wall part 44 Pole (protruding part)
44a Lower end 44b Lower end part 54 Through hole 58 Expanded diameter part 60 Extension part

Claims (7)

An upper wall portion made of a flexible material; a lower wall portion facing the upper wall portion; and a protrusion protruding from the intermediate portion in the width direction of the upper wall portion toward the lower wall portion. In a vehicle duct structure disposed between a vehicle bonnet and a vehicle body part located below the bonnet,
The vehicle body part is formed with higher rigidity than the lower wall part and the protruding part,
A duct structure for a vehicle, wherein the lower wall portion is provided with a through hole through which the lower end portion of the protruding portion can be inserted so as to face the lower end of the protruding portion. In the vehicle duct structure according to claim 1,
The outer periphery of the protrusion has a diameter-expanding portion that expands radially outward.
The dimension (L) of the gap formed between the lower surface of the enlarged diameter portion and the upper surface of the lower wall portion in the axial direction of the protruding portion is the lower wall forming the lower end of the protruding portion and the through hole. It is set smaller than the dimension (M) between the lower surface of the part or the dimension (N) of the gap formed between the lower end of the protruding part and the upper surface of the vehicle body part (L <M, L < N) A vehicle duct structure characterized by that. The vehicle duct structure according to claim 2,
The inner surface of the lower wall portion has an extending portion that extends from the lower wall portion toward the enlarged diameter portion,
The dimension (A) of the gap formed between the lower surface of the enlarged diameter portion and the upper end of the extending portion in the axial direction of the protruding portion is the lower wall that forms the lower end of the protruding portion and the through hole. It is set smaller than the dimension (B) between the upper surface of the part or the dimension (C) of the gap formed between the lower end of the protruding part and the upper surface of the vehicle body part (A <B, A < C) A vehicle duct structure characterized by that. An upper wall portion formed of a flexible material; a lower wall portion facing the upper wall portion; and a protrusion protruding from the intermediate portion in the width direction of the upper wall portion toward the lower wall portion. In the vehicle duct structure disposed between the hood of the vehicle and the vehicle body part located below the hood,
The outer periphery of the protrusion has a diameter-expanding portion that expands radially outward.
The inner surface of the lower wall portion has an extending portion that extends from the lower wall portion toward the enlarged diameter portion,
The dimension (S) of the gap formed between the lower surface of the enlarged diameter portion and the upper end of the extending portion in the axial direction of the protruding portion is between the lower end of the protruding portion and the upper surface of the lower wall portion. A duct structure for a vehicle characterized by being set smaller than a dimension (T) of (S <T). The vehicle duct structure according to claim 4,
The vehicle body part is formed with higher rigidity than the lower wall part and the protruding part,
The lower wall portion is provided with a through-hole through which the lower end portion of the protruding portion can be inserted, facing the lower end of the protruding portion,
The dimension (A) of the gap formed between the lower surface of the enlarged diameter portion and the upper end of the extending portion in the axial direction of the protruding portion is formed between the lower end of the protruding portion and the upper surface of the vehicle body part. A duct structure for a vehicle, wherein the duct structure is set smaller than a dimension (C) of the gap. In the vehicle duct structure according to claim 3 to 5,
The enlarged diameter portion is provided over substantially the entire circumference of the outer periphery of the protruding portion,
The duct structure for a vehicle, wherein the extending portion is provided in a substantially cylindrical shape so as to contact the enlarged diameter portion. An upper wall portion made of a flexible material; a lower wall portion facing the upper wall portion; and a protrusion protruding from the intermediate portion in the width direction of the upper wall portion toward the lower wall portion. In a vehicle duct structure disposed between a vehicle bonnet and a vehicle body part located below the bonnet,
The vehicle body part is formed with higher rigidity than the lower wall part and the protruding part,
The lower wall portion is provided with a notch portion through which the lower end portion of the protruding portion penetrates in opposition to the lower end of the protruding portion, and the lower end of the protruding portion can slide along the upper surface of the vehicle body part. A vehicle duct structure characterized by that.

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