JP5267028B2 - Under cover structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an undercover structure suppressing whirling of the air at a recess formed between a travel wind introduction port and a lower end of a heat exchanger to guide the air smoothly and thereby enabling to supply the travel wind to the heat exchanger without reducing the travel wind pressure. <P>SOLUTION: In an undercover 6 mounted between a bumper fascia 3 and a radiator core support lower 51, a swollen part A which is a center part in the vehicle longitudinal direction swollen upwardly to a height generally matching the lower edge of the travel wind introduction port 31 is formed, and the swollen part A comprises a front wall 61, a rear wall 63, and an upper face 62 connecting the front wall 61 and the rear wall 63. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an undercover structure that efficiently takes in outside air during traveling and enhances the cooling effect of a heat exchanger.

Conventionally, an air guide portion extending obliquely upward and rearward is provided at the lower edge portion of the travel wind introduction port in the bumper fascia, and the air guide portion guides the travel wind introduced from the travel wind introduction port in the radiator direction. There is known a structure in which a substantially flat under cover is mounted between a lower end edge of a bumper fascia that extends obliquely downward and rearward from a front edge of the air guide and a cross member (for example, a patent) Reference 1).
JP 2004-203158 A

  However, in the above-described conventional technology, as described above, a substantially flat under cover is mounted between the lower edge of the bumper that extends diagonally downward and rearward from the front edge of the air guide and the cross member. In the structure, since a recessed portion recessed downward is formed between the rear edge portion of the air guide and the radiator (heat exchanger), air swirls in this recessed portion to reduce the traveling pressure, As a result, there has been a problem that the cooling effect of the radiator (heat exchanger) is lowered.

  The present invention has been made paying attention to the conventional problems as described above, and suppresses the swirling of air in the recess formed between the traveling wind inlet and the lower end of the heat exchanger. Therefore, it is an object of the present invention to provide an undercover structure that can smoothly guide and thereby feed the traveling air into the heat exchanger without dropping the traveling air pressure.

  In order to achieve the above-mentioned object, the under cover structure of the present invention is an under cover that is mounted between a bumper fascia and a heat exchanger core support lower, and the under cover is a running wind inlet port. A bulging portion is formed in which a center portion in the front-rear direction of the vehicle bulges up to a height substantially along the lower edge portion.

In the under cover structure according to the present invention, as described above, a bulging portion is formed in which the center portion in the front-rear direction of the vehicle bulges up to a height substantially along the lower edge portion of the traveling wind introduction port. Since the dent formed between the traveling wind inlet and the lower end of the heat exchanger is blocked by the bulging portion of the under cover, air is introduced between the traveling wind inlet and the lower end of the heat exchanger. Is smoothly guided by suppressing the vortex.
Accordingly, it is possible to send the traveling wind to the heat exchanger without reducing the traveling wind pressure, thereby obtaining the effect that the cooling effect of the heat exchanger can be enhanced.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 is a perspective view from the vehicle front side showing the under cover structure of the first embodiment, FIG. 2 is an enlarged sectional view taken along line S2-S2 in FIG. 1, and FIG. 3 is an enlarged sectional view taken along line S3-S3 in FIG. 4 is an enlarged cross-sectional view taken along line S4-S4 of FIG. 1, FIG. 5 is a perspective view from the front side of the vehicle showing a state in which the left and right side air guides are assembled to the under cover of the first embodiment, and FIG. It is a vertical side view which shows the attachment state to the vehicle body of an undercover.

The under cover structure of the first embodiment includes a bumper reinforcement 1, an impact buffering member 2, a bumper fascia 3, a radiator (heat exchanger) 4, a radiator core support 5, an under cover 6, and both left and right sides. Side air guide 7.

As shown in FIG. 6, a bumper fascia 3 is provided in front of the bumper reinforcement 1 via an impact buffer member 2.
The bumper fascia 3 is provided so as to cover the front portion of the vehicle, and below the bumper reinforcement 1 in the bumper fascia 3, a traveling wind introduction port 31 for introducing traveling wind to the radiator 4 is long in the vehicle width direction. Is formed.

  The radiator 4 is attached to a radiator core support 5 provided at the vehicle rear side of the traveling wind introduction port 31, and is cooled by traveling wind introduced from the traveling wind introduction port 31.

  Further, an air guide portion 32 extending rearward of the vehicle is extended at the opening edge of the traveling wind introduction port 31 in the bumper fascia 3, and the tip of the air guide portion 32 that is the lower opening edge portion of the traveling wind introduction port 31. A lower portion 33 of the bumper fascia 3 extends obliquely downward and rearward from the edge.

  The under cover 6 is mounted between the bumper facer 3 and a radiator core support lower (heat exchanger core support lower) 51 in the radiator core support 5 in a state of closing the opening.

The under cover 6 is formed with a bulging portion A in which the center in the front-rear direction of the vehicle swells upward to a height substantially along the lower edge opening of the traveling wind introduction port 31.
In this embodiment, the bulging portion A includes a front wall 61, a rear wall 63, and an upper surface portion 62 that connects the front wall 61 and the rear wall 63.

  In addition, horizontal walls 66 and 66 are provided to close the openings formed on the left and right sides of the under cover 6 at the left and right end edges of the front wall 61, the upper surface portion 62, and the rear wall 63, respectively.

  In addition, a front opening that opens toward the vehicle front side along each lateral wall 66, 66 is formed at both ends in the vehicle width direction of the front wall 61. The front opening has a cross-section in which the front end and the lower surface open. A substantially gate-shaped front duct 67, 67 extends along the lateral walls 66, 66 toward the vehicle front side.

  Ribs 68 and 68 are formed in the front ducts 67 and 67 in the vicinity of the opening edge portions of the front opening portions 67a and 67a having a cross-sectional gate shape to cover the upper portions of the front opening portions 67a and 67a.

  Moreover, the side air guide which mounts the lower end of the side air guides 7 and 7 mounted on both the left and right end portions of the under cover 6 by raising the upper surface 62 and the upper surfaces of the front ducts 67 and 67 further upward. Lower end side mounting portions 69, 69 are formed.

  In the side air guide lower end side mounting portions 69, 69, an engagement hole 69a for inserting and engaging a pin (not shown) projecting downward from the bottom of the left and right side air guides 7, 7 is provided. 69a are formed at two locations, respectively.

  As shown in FIGS. 1 to 4 and 6, the front wall 61 has a front-side mounting flange portion 64 extending from the lower end edge portion toward the vehicle front side with respect to the vehicle rear end edge portion of the lower portion 33 in the bumper fascia 3. Has been.

  The front side mounting flange portion 64 has six insertion holes 64 a for attaching the front side mounting flange portion 64 with the clip 8 to the vehicle rear end edge portion of the lower portion 33 in the bumper fascia 3. .

  Further, the front wall 61 at a position close to the insertion hole 64a has an attachment work hole 61a for attaching the front attachment flange portion 64 with the clip 8 to the upper surface of the vehicle rear end edge portion of the lower portion 33 in the bumper fascia 3. It is formed in three places.

A rear mounting flange 65 for the radiator core support lower 51 is extended from the lower edge of the rear wall 63 toward the rear side of the vehicle.
A plurality of insertion holes 65 a are formed in the rear mounting flange portion 65 for mounting with the clip 9 to the lower surface of the radiator core support lower 51.

  Note that insertion holes (not shown) through which the clips 8 and 9 are inserted are respectively formed in the lower portion 33 of the bumper facer 3 facing the insertion hole 64a and the radiator core support lower 51 facing the insertion hole 65a. Has been.

  Next, functions and effects of the first embodiment will be described.

  Since the under cover structure of the first embodiment is configured as described above, the under cover 6 is attached by attaching a front mounting flange portion 64 of the under cover 6 with a clip 8 as shown in FIG. 3 is fixed to the upper surface of the lower edge portion of the lower portion 33.

  Further, the rear mounting flange portion 65 of the under cover 6 is fixed to the lower surface of the radiator core support lower 51 with the clip 9.

  When mounting the front mounting flange portion 64 to the upper surface of the lower edge of the lower portion 33 of the bumper fascia 3, the mounting work holes 61 a formed at three locations on the front wall 61 are rearward of the vehicle (swelling in the under cover 6). Insert the clip 8 from the lower surface side of the lower portion 33 of the bumper fascia 3 in a state where the finger is extended from the inside of the portion A) and the front mounting flange portion 64 is pressed against and supported by the upper surface of the lower portion 33 of the bumper facer 3. The front mounting flange portion 64 is fixed to the lower portion 33.

  Next, with respect to the side air guide lower end side mounting portions 69 and 69 formed at the left and right end portions of the under cover 6, the left and right engagement holes 69a and 69a formed in the side air guide lower end side mounting portions 69 and 69 are The left and right side air guides 7 and 7 are assembled by inserting and engaging pins (not shown) protruding downward at the bottoms of the side air guides 7 and 7.

As described above in detail, in the under cover structure of the first embodiment, the bulging portion A is formed in which the center portion in the front-rear direction of the vehicle bulges up to a height substantially along the lower edge opening of the traveling wind introduction port 31. With this configuration, the recess formed between the traveling wind inlet 31 and the lower end of the radiator 4 is closed by the bulging portion A of the under cover 3. Air can be prevented from swirling between the inlet 31 and the lower end portion of the radiator 4 and can be smoothly guided toward the radiator 4.
Accordingly, it is possible to send the traveling wind to the radiator 4 without reducing the traveling wind pressure, thereby obtaining the effect that the cooling effect of the radiator 4 can be enhanced.

  Further, since the bulging portion A is composed of the front wall 61, the rear wall 63, and the upper surface portion 62 connecting the front wall 61 and the rear wall 63, the conventional running wind inlet 31 and the lower end portion of the radiator 4 It becomes possible to efficiently close the recesses formed between them with the upper surface portion 62 of the under cover 3.

In addition, lateral walls 66 and 66 are provided to close the openings formed on the left and right sides of the under cover 6 at the left and right edge portions of the front wall 61, the upper surface portion 62, and the rear wall 63, respectively. Since the front side opening portion that opens toward the front side of the vehicle along each horizontal wall 66, 66 is formed in the portion, water enters the inner back surface of the bulging portion A when entering the submerged channel, and the rear wall 63 At this time, the water flowing in the vehicle width direction can be received by the lateral walls 66, 66 and can be drawn out of the vehicle from the front opening on the vehicle front side. Thereby, the water pressure which the under cover 6 receives can be reduced.
Therefore, the attachment of the under cover 6 can be changed from the bolt fastening to the clip stop, and the attachment work of the under cover 6 can be easily performed.

In addition, the front opening has a configuration in which front ducts 67 and 67 having a substantially gate-shaped cross section with an opening at the front end and a lower surface are extended along the horizontal walls 66 and 66 toward the vehicle front side. The lower portions of the vehicle front side portions of the side air guides 7 and 7 assembled to the upper portions of the front ducts 67 and 67 can be blocked by the front ducts 67 and 67.
Therefore, it is possible to prevent the traveling wind introduced from the traveling wind introduction port 31 from escaping to the side of the vehicle through the lower side of the side air guides 7 and 7 and efficiently send it to the radiator 4. The effect that the cooling effect of the radiator 4 can be enhanced is obtained.

  In addition, ribs 68 and 68 are formed in the vicinity of the opening edges of the gate-shaped tip openings 67a and 67a so as to close the upper portions of the tip openings 67a and 67a. The strength of 67a and 67a can be increased, and water can be efficiently discharged downward.

  Further, the front wall 61 at a position close to the insertion hole 64a has an attachment work hole 61a for attaching the front attachment flange portion 64 with the clip 8 to the upper surface of the vehicle rear end edge portion of the lower portion 33 in the bumper fascia 3. With the configuration formed at three locations, the fixing operation of the front flange portion 64 to the lower portion 33 of the bumper fascia 3 can be easily performed from the lower side of the under cover 6.

In addition, the upper surface 62 and the upper surfaces of the front ducts 67 and 67 are further raised upward and inflated at the end opening portions 67a and 67a having a gate-shaped cross section formed at both left and right end portions of the under cover 6, respectively. The side air guide lower end side mounting portions 69 and 69 are mounted so that the lower ends of the guides 7 and 7 are placed and attached, so that the other portions are not rubbed when the side air guides 7 and 7 are mounted. The side air guide lower end side mounting portions 69 and 69 can be brought.
Further, the rigidity of the front ducts 67, 67 having a gate-shaped cross section is increased, and the cross section of the water channel is increased, whereby the drainage effect can be enhanced.

  Further, the side air guide lower end side mounting portions 69, 69 are fitted with engaging holes 69a, 69a for inserting and engaging pins (not shown) projecting downward at the bottoms of the left and right side air guides 7, 7. As a result, the assembly work of the left and right side air guides 7 and 7 can be performed easily.

  As described above, the embodiments of the present invention have been described with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and the present invention can be applied even if there is a design change or the like without departing from the gist of the present invention. included.

  For example, in the embodiment, a rear mounting flange portion 65 for the radiator core support lower 51 extends from the lower end edge of the rear wall 63 toward the rear side of the vehicle, and the rear mounting flange portion 65 of the under cover 6 is extended. Is fixed to the lower surface of the radiator core support lower 51 with the clip 9, but the rear mounting flange portion 65 is omitted and the rear wall 63 is fixed to the vehicle front wall of the radiator core support lower 51. Good.

  In the embodiment, the front mounting flange portion 64 of the under cover 6 is fixed to the upper surface of the lower end edge portion of the lower portion 33 of the bumper fascia 3 by the clip 8. Alternatively, it may be fixed. In this case, the mounting hole can be omitted.

  Further, in the embodiment, the clips 8 and 9 are used as the fixing means for the under cover 6, but the fixing means is optional such as using a tap screw.

1 is a perspective view from the front side of a vehicle showing an under cover structure of Example 1. FIG. FIG. 2 is an enlarged cross-sectional view taken along line S2-S2 of FIG. It is an expanded sectional view in the S3-S3 line of FIG. It is an expanded sectional view in the S4-S4 line of FIG. FIG. 4 is a perspective view from the front side of the vehicle showing a state where the left and right side air guides are assembled to the under cover of the first embodiment. It is a vertical side view which shows the attachment state to the vehicle body of the undercover of Example 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pampa reinforcement 2 Impact buffer member 3 Bumper fascia 31 Running wind inlet 32 Air guide part 33 Lower part 4 Radiator (heat exchanger)
5 Radiator core support 51 Radiator core support lower (heat exchanger core support lower)
6 Undercover 61 Front wall 61a Mounting hole 62 Upper surface portion 63 Rear wall 64 Front mounting flange portion 64a Insertion hole 65 Rear attachment flange portion 65a Insertion hole 66 Side wall 67 Front duct 67a Tip opening 68 Rib 69 Lower end of side air guide Side mounting portion 69a Engagement hole 7 Side air guide 8 Clip 9 Clip

Claims (4)

An under cover that is mounted between the bumper fascia and the heat exchanger core support lower,
The under cover is formed with a bulge portion in which the center portion in the front-rear direction of the vehicle bulges up to a height substantially along the lower edge portion of the traveling wind inlet ,
The bulge portion comprises a front wall, a rear wall, and an upper surface portion connecting the front wall and the rear wall,
Horizontal walls are provided to respectively close the openings formed on the left and right sides of the under cover at the left and right end edges of the front wall, the upper surface portion, and the rear wall,
Front side openings that open toward the front side of the vehicle along the lateral walls are formed at both ends of the front wall in the vehicle width direction,
In the front opening portion of the front wall, a front duct having a substantially gate-shaped cross-section with an opening at the front end and a lower surface is extended toward the vehicle front side along each lateral wall,
Wherein the upper surface of each front side duct, under cover structure the lower end of the vehicle front portion of the side air guide and said Rukoto mounted is placed. The under cover structure according to claim 1, wherein a rib for closing a part of the upper side in the front end opening is formed in the vicinity of the opening edge of the front end opening in the front duct. A mounting flange for the bumper fascia is extended from the lower edge of the front wall toward the vehicle front side,
  The under cover structure according to claim 1 or 2, wherein an attachment work hole for attaching the attachment flange portion to the bumper fascia with a clip is formed in the front wall. Side air guide lower end side mounting portions for mounting the lower end of the side air guide by mounting the lower end of the side air guide are formed on both the left and right end portions of the under cover. The undercover structure according to any one of claims 1 to 3, wherein the undercover structure is provided.

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