JP4777033B2 - Bumper integrated diffuser structure - Google Patents

Description

  The present invention relates to a bumper-integrated diffuser structure in which a diffuser constituting an end portion of a muffler is integrally provided on a bumper.

  In recent years, as shown in FIG. 5, a bumper integrated diffuser structure 804 having a design in which a discharge port 802 of a muffler 801 is integrated with a rear bumper 803 is known.

  The rear bumper 803 is provided with a cylindrical bumper diffuser 811, and a tail portion 812 at the tip of the muffler 801 is configured to be loosely fitted to the bumper diffuser 811. The muffler 801 is suspended from the vehicle body via a rubber and is configured to absorb vibration.

  A gap 821 is provided between the bumper diffuser 811 and the tail portion 812 of the muffler 801 so that the tail portion 812 and the bumper diffuser 811 do not interfere with each other when the muffler vibrates.

  However, in such a bumper-integrated diffuser structure 804, the bumper diffuser 811 that receives the exhaust heat from the muffler 801 is formed of metal, but the rear bumper 803 to which the bumper diffuser 811 is attached is a composite. It is made of resin. And the said bumper diffuser 811 which receives the said exhaust heat tends to become high temperature, and we are anxious about the influence by this heat. For this reason, it was difficult to take measures against heat.

  The present invention has been made in view of such a conventional problem, and an object of the present invention is to provide a bumper-integrated diffuser structure that can suppress the influence of exhaust heat.

  In order to solve the above-mentioned problem, in the bumper-integrated diffuser structure according to claim 1 of the present invention, the bumper is integrally provided with a diffuser, and exhaust gas from the muffler is discharged through the diffuser. In the body-shaped diffuser structure, the diffuser is configured by a cylindrical portion that guides the exhaust gas to the outside of the bumper, and an extended surface that extends from the edge of the cylindrical portion toward the muffler body, and the extended surface is Arranged at the bottom of the muffler.

  That is, the diffuser provided in the bumper may be heated by the exhaust heat from the muffler and become high temperature.

  At this time, the diffuser includes a cylindrical portion that guides the exhaust gas to the outside of the bumper, and an extended surface that extends from the edge of the cylindrical portion toward the muffler body, and the diffuser The surface area can be increased as compared with the case where the cylinder portion is arranged only in the bumper which is easy to remain. Thereby, the heat applied to the diffuser can be dissipated from the extending surface, and a heat dissipating effect is obtained.

  Further, when the extending surface receives wind, the cooling effect is enhanced, and the wind is guided to the cylindrical portion.

  And the said extension surface is arrange | positioned from the said cylinder part to the muffler main body side, and is arrange | positioned at the lower part of the said muffler. For this reason, when the inside is looked into from the said cylindrical part of the said diffuser, the said extension surface can be arrange | positioned on the eyeline which connects the position of an eye and a road surface.

  Further, in the bumper-integrated diffuser structure according to claim 2, the bottom surface of the cylindrical portion of the cylindrical portion is formed by an inclined surface that is inclined downward toward the muffler body side, and is provided on an extension of the lower surface of the cylindrical portion. A bent portion that inclines the extended surface with respect to the lower surface of the cylindrical portion is set between the lower surface of the cylindrical portion and the extended surface so that the extended surface that is formed extends along the muffler.

  That is, the cylinder part which comprises a diffuser is comprised by the inclined surface which the cylinder part lower surface inclined downward, and can arrange | position a muffler edge part below the opening part of the said cylinder part. In this case, the exposure amount from the opening part of the said cylinder part of the said muffler edge part is suppressed.

  Further, the extension surface provided on the extension of the lower surface of the cylindrical portion is configured to extend along the muffler by a bent portion provided in an intermediate portion. For this reason, compared with the case where the said extension surface is provided on the extension of the inclined said cylinder part lower surface, the protrusion amount to the downward direction of the said extension surface is suppressed.

  Furthermore, the extended surface is used as an under cover for preventing interference of a curbstone or the like to the lower surface of the muffler.

  As described above, in the diffuser structure according to claim 1 of the present invention, the heat applied to the diffuser by the exhaust heat from the muffler can be dissipated from the extended surface provided in the diffuser, and the heat dissipation effect Can be obtained.

  Moreover, a cooling effect can be heightened when this extending surface receives a wind. And the said wind can be guided to the said cylinder part, while being able to acquire the thermal radiation effect in the said cylinder part, discharge | emission of the exhaust gas which passes the said cylinder part can be accelerated | stimulated.

  On the other hand, the extension surface extends from the cylindrical portion toward the muffler main body side and is disposed at a lower portion of the muffler, and when looking into the interior from the cylindrical portion of the diffuser, the position of the eyes and the road surface The extending surface can be arranged on the eye line connecting the two.

  Thereby, when looking inside from the opening part of the said diffuser, external appearance quality can be improved compared with the past in which a road surface is visible in the said diffuser.

  In the bumper-integrated diffuser structure according to claim 2, the bottom surface of the cylindrical portion of the cylindrical portion constituting the diffuser is configured with an inclined surface inclined downward, so that the end of the muffler is located below the opening of the cylindrical portion. Can be arranged. Thereby, the exposure amount of the said muffler edge part in the opening part of the diffuser provided in the bumper can be made small, and external appearance quality can be improved.

  Further, the extension surface provided on the extension of the lower surface of the cylindrical portion is configured to extend along the muffler by a bent portion provided in an intermediate portion. For this reason, compared with the case where the said extension surface is provided on the extension of the inclined said cylinder part lower surface, the protrusion amount to the downward direction of the said extension surface can be suppressed. Thereby, interference with others can be prevented.

  Further, the extended surface can be used as an under cover for preventing interference of a curbstone or the like to the lower surface of the muffler.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a view showing a bumper-integrated diffuser structure 1 according to the present embodiment, and shows a rear portion of a vehicle provided with the bumper-integrated diffuser structure 1.

  That is, a rear bumper 11 is provided at the rear end portion of the vehicle, and the rear bumper 11 is formed of a synthetic resin such as PP. As a result, the rear bumper 11 can be reduced in weight and the design can be improved.

  At both ends of the rear bumper 11, a horizontally long exhaust portion 15 is opened (shown only on the left), and as shown in FIG. 2, a bumper diffuser 16 is attached to the exhaust portion 15, The bumper diffuser 16 is provided integrally with the rear bumper 11. The rear bumper 11 is provided with bumper fixing pieces 17 extending to the vehicle front FR at the upper part and the left and right side parts of the exhaust part 15 (only the upper bumper fixing piece 17 is shown), and each bumper is fixed. The piece 17 is provided with a bolt insertion hole for inserting the bolt 18 when the vehicle body is fixed.

  The bumper diffuser 16 is formed of stainless steel, and the bumper diffuser 16 includes a cylindrical portion 21 disposed in the exhaust portion 15 and an edge of the cylindrical portion 21 as shown in FIGS. 3 and 4. It is comprised by the extension part 23 extended from the part to the vehicle front FR which is the muffler 22 main body side (refer FIG. 2).

  The cylinder portion 21 is a rectangular cylinder formed by a cylinder portion lower surface 31 constituting the lower surface side in the mounted state, a cylinder portion upper surface 32 constituting the upper surface side, and opposed cylinder side surfaces 33 and 33 constituting the left and right side portions. It is formed in a shape. The cylinder portion 21 is formed so that the inner diameter dimension decreases as it goes toward the vehicle front FR, and the cylinder portion lower surface 31 is an inclined surface that is inclined downward toward the vehicle front FR on the muffler 22 main body side. It is configured. A rear edge of the cylindrical portion 21 extends to the side, and then a folded portion 34 that is folded back toward the vehicle forward FR is formed over the entire circumference. The bumper diffuser 16 is connected to the rear bumper. 11, the folded portion 34 is arranged along the opening edge of the exhaust portion 15 (see FIG. 2).

  The cylindrical part upper surface 32 and the left and right cylindrical part side surfaces 33, 33 are provided with fixing brackets 41,... Protruding outward, and the fixing brackets 41,. ... are provided. As a result, as shown in FIG. 2, the bolts 18 inserted into the bumper fixing pieces 17 of the rear bumper 11 are inserted into the bolt insertion holes 42 of the corresponding fixing bracket 41 and tightened with the nuts 43. The bumper diffuser 16 can be fixed to the rear bumper 11.

  As shown in FIGS. 2 to 4, the extending portion 23 includes an extending surface 51 that is connected to the bottom surface 31 of the cylindrical portion, and a side wall surface 52 that is connected to the side surfaces 33 and 33 of the cylindrical portions. The extension portion 23 is integrally formed with the cylindrical portion 21. At the corners of the extended surface 51 and the side wall surfaces 52, 52, there are continuous surfaces 53, 53 that connect the front edge of the extended surface 51 and the front edge of the side wall surfaces 52, 52, respectively. A muffler insertion portion 54 for loosely fitting the muffler 22 is formed between the two continuous surfaces 53 and 53 (see FIG. 4).

  As shown in FIGS. 2 and 3, a bent portion 61 is set between the cylindrical portion lower surface 31 and the extending surface 51 of the cylindrical portion 21, and extends on the extension of the cylindrical portion lower surface 31. The extending surface 51 is inclined with respect to the tubular portion lower surface 31 so that the provided extending surface 51 extends along the muffler 22.

  As a result, as shown in FIG. 2, the bumper diffuser 16 is located above the departure line 74 that connects the ground point 72 where the tire of the vehicle is in contact with the road surface 71 and the contact point 73 which is in contact with the rear bumper 11 in a straight line. It can be arranged in the area. Further, when looking into the interior from the opening 75 of the bumper diffuser 16 opened to the rear bumper 11 from the rear part of the vehicle, the extension extends above the eyeline 76,... Connecting the eye position and the road surface 71. It is comprised so that the extension surface 51 of the protrusion part 23 may be arrange | positioned.

  As shown in FIG. 3, the side wall surfaces 52, 52 of the extending portion 23 are set so that the height of the rear end portions 81, 81 is increased (only one is shown). The portions 81 and 81 are provided with L-shaped brackets 82 and 82. Nuts 83, 83 are fixed to the L-shaped brackets 82, 82, and the fixing surfaces 84, 84 of the L-shaped brackets 82, 82 are fixed to the vehicle body 85 of the vehicle as shown in FIG. The bumper diffuser 16 can be fixed to the vehicle body 85 by being in surface contact with the rear panel 86 and by screwing a bolt (not shown) inserted through the rear panel 86 into the nut 83. Thus, the bumper diffuser 16 also serves as a fixture for fixing the rear bumper 11 to the vehicle body 85.

  As shown in FIG. 2, the muffler 22 includes an unillustrated exhaust pipe connected to the engine, a large-diameter silencer 91 connected to the exhaust pipe, and an extension extending from the silencer 91. Each of the pipes 91 and 92 is suspended from the vehicle body 85 via a buffer member 93 such as a rubber. A tail pipe 94 is connected to the distal end portion of the extension pipe 92, and the tail pipe 94 passes over the extension surface 51 of the extension portion 23 and also passes through the lower portion of the rear panel 86. The distal end portion is disposed so as to be inserted into the cylindrical portion 21 of the bumper diffuser 16. A gap is provided between the tail pipe 94 and the extending surface 51, and a tip end portion of the tail pipe 94 is loosely fitted to the cylindrical portion 21. Thus, the muffler 22 is configured not to interfere with the bumper diffuser 16 even if the muffler 22 vibrates.

  The tail pipe 94 is disposed below the height position of the opening 75 of the bumper diffuser 16, and the tail pipe 94 is curved with the exhaust port 101 side opened at the end thereof facing upward. ing. Thus, the exhaust gas exhausted from the exhaust port 101 of the tail pipe 94 is directed in the direction along the cylindrical portion 21 of the bumper diffuser 16, and the exhaust gas is By being guided, the rear bumper 11 can be discharged to the vehicle rear RR.

  In the present embodiment having the above-described configuration, the metal bumper diffuser 16 provided on the synthetic resin rear bumper 11 may be heated by the exhaust heat from the muffler 22 and become high temperature.

  At this time, the bumper diffuser 16 includes a cylinder portion 21 that guides the exhaust gas to the vehicle rear RR side outside the rear bumper 11, and a vehicle front FR that is closer to the muffler 22 body side than the edge portion of the cylinder portion 21. And the bumper diffuser 16 is constituted only by the cylindrical portion 21 disposed in the rear bumper 11 made of a synthetic resin that is easily trapped in heat. Compared with the case, the surface area can be increased.

  For this reason, the heat applied to the bumper diffuser 16 by the exhaust heat from the muffler 22 can be radiated from the extension surface 51 of the extension portion 23 provided in the bumper diffuser 16, and the heat dissipation effect can be obtained. Obtainable.

  Further, the extending portion 23 is provided on the vehicle front FR from the rear bumper 11, and the cooling effect is enhanced by receiving the traveling wind on the extending surface 51 of the extending portion 23 during traveling. Can do.

  Further, the extending surface 51 also functions to guide the traveling wind to the cylindrical portion 21. For this reason, while being able to acquire the heat dissipation effect in the said cylinder part 21, discharge | emission of the exhaust gas which passes the said cylinder part 21 can be accelerated | stimulated.

  The extending surface 51 of the extending portion 23 extends from the cylindrical portion 21 toward the muffler 22 main body side, and is disposed below the muffler 22. For this reason, when the inside of the bumper diffuser 16 is looked into from the cylindrical portion 21, the extending surface 51 of the extending portion 23 is disposed on the eye line 76 connecting the eye position and the road surface 71. be able to.

  Thereby, when looking inside from the opening part 75 of the said bumper diffuser 16, the external appearance quality can be improved compared with the past in which the road surface 71 is visible in the said bumper diffuser 16.

  Moreover, the said cylinder part 21 which comprises the said bumper diffuser 16 is comprised by the inclined surface which the cylinder part lower surface 31 inclined downward, and the said muffler 22 edge part is the said cylinder like this Embodiment. It can be disposed below the opening 75 of the part 21. Thereby, the exposure amount of the exhaust port 101 at the end of the muffler 22 in the opening 75 of the bumper diffuser 16 provided in the rear bumper 11 can be reduced, and the appearance quality can be improved.

  The extension surface 51 provided on the extension of the cylindrical portion lower surface 31 is configured to extend along the muffler 22 by a bent portion 61 provided in an intermediate portion. For this reason, compared with the case where the extension surface 51 of the said extension part 23 is provided on the extension of the said cylinder part lower surface 31, it can suppress the protrusion amount of the said extension surface 51 below. Thereby, interference with others, such as unevenness formed on the road surface, can be prevented.

  Further, the extended surface 51 can be used as an under cover for preventing interference of a curbstone or the like to the lower surface of the muffler 22.

It is an enlarged view of the principal part which shows one embodiment of this invention. It is sectional drawing which shows the principal part of the embodiment. It is a side view which shows the bumper diffuser of the embodiment. It is a top view which shows the bumper diffuser of the embodiment. (A) is sectional drawing which shows the conventional bumper integrated diffuser structure, (b) is a figure which shows the rear part of the vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bumper integrated diffuser structure 11 Rear bumper 16 Bumper diffuser 21 Cylinder part 22 Muffler 23 Extension part 31 Cylinder lower surface 51 Extension surface 61 Bending part 71 Road surface

Claims (2)

In the bumper-integrated diffuser structure in which the diffuser is provided integrally with the bumper, and the exhaust gas from the muffler is discharged through the diffuser,
The diffuser includes a cylindrical portion that guides the exhaust gas to the outside of the bumper, and an extended surface that extends from the edge of the cylindrical portion toward the muffler main body, and the extended surface is disposed at a lower portion of the muffler. Bumper integrated diffuser structure characterized by While the bottom surface of the cylindrical portion of the cylindrical portion is configured with an inclined surface that is inclined downward toward the muffler body side,
A bent portion that inclines the extending surface with respect to the bottom surface of the tube portion so that the extending surface provided on the extension of the bottom surface of the tube portion extends along the muffler, and the bottom surface of the tube portion and the extending surface The bumper-integrated diffuser structure according to claim 1, which is set between the two.

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