JP2007090914A - Muffler structure integrated with bumper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a muffler structure integrated with a bumper capable of improving appearance quality. <P>SOLUTION: A bumper diffuser 25 is provided on a rear bumper 11, and a bumper diffuser extension 31 is connected to the bumper diffuser 25. The muffler 32 is connected to the bumper diffuser extension 31, and a muffler exhaust port 33 is connected to the bumper diffuser 25 through the bumper diffuser extension 31. The bumper diffuser extension 31 is made to be a bent shape as a whole, and composed so that a diffuser opening part 81 and the muffler exhaust port 33 are offset. When a virtual line 85 passing through the diffuser opening part 81 is assumed, a part of the virtual line 85 crosses the inner side wall surface 61 of the bumper diffuser extension 31 to be constituted so that all of virtual lines 85 do not directly arrive at the muffler exhaust port 33. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a bumper-integrated muffler structure in which an exhaust port of a muffler is connected to a diffuser provided in the bumper.

  In recent years, as shown in FIG. 4, a bumper integrated muffler 804 (integrated muffler) having a design in which an exhaust port 802 of a muffler 801 is integrated with a rear bumper 803 is known.

  The rear bumper 803 is provided with a bumper diffuser 811 that forms an insertion hole. The tail 812 at the tip of the muffler 801 is 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 when the muffler vibrates.

  However, in such a bumper-integrated muffler structure, the central axis of the bumper diffuser 811 provided in the rear bumper 803 and the central axis of the exhaust port 802 of the muffler 801 are arranged so as to coincide with each other. The exhaust outlet 802 opened in the bumper diffuser 811 is seen.

  This makes it difficult to improve visual quality.

  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 muffler structure capable of improving the appearance quality.

  In order to solve the above-described problem, the bumper-integrated muffler structure according to claim 1 of the present invention includes a bumper-integrated muffler structure in which an exhaust port of the muffler is connected to a diffuser provided in a bumper at the rear of the vehicle. An extension portion for offsetting the opening of the diffuser and the exhaust port of the muffler so that a virtual line extending through the opening of the diffuser and extending forward of the vehicle does not directly reach the exhaust port of the muffler; It was provided between the muffler and the diffuser.

  That is, between the diffuser provided on the bumper and the muffler, an extension portion for offsetting the opening portion of the diffuser and the exhaust port of the muffler is provided, and passes through the opening portion of the diffuser to front the vehicle. The imaginary line extending in the direction is configured not to reach the exhaust port of the muffler directly.

  For this reason, the exhaust port of the muffler is removed from the field of view when looking into the diffuser from the rear of the vehicle.

  In the bumper-integrated muffler structure according to claim 2, the extension portion is formed in a cylindrical shape provided with a bent portion, and the imaginary line connecting the opening portion of the diffuser and the exhaust port of the muffler. The intersecting wall portion was set as the extension portion.

  That is, the extension portion provided between the diffuser and the muffler is provided with a bent portion, and the extension portion includes a wall portion that intersects an imaginary line connecting the opening portion of the diffuser and the exhaust port of the muffler. Is set.

  For this reason, the diffuser is moved to a position where the imaginary line extending in the vehicle longitudinal direction passing through the opening of the diffuser and the imaginary line extending in the vehicle longitudinal direction passing through the exhaust port of the muffler do not overlap. Compared with the case where the opening of the muffler and the exhaust port of the muffler must be offset, the offset amount of both can be reduced.

  Furthermore, in the bumper-integrated muffler structure of claim 3, the opening direction of the exhaust port is set so that the central axis of the exhaust port of the muffler is inclined with respect to the imaginary line.

  That is, the central axis of the exhaust port of the muffler is inclined with respect to a virtual line that passes through the opening of the diffuser and extends forward of the vehicle, and the opening direction of the exhaust port is oblique with respect to the virtual line Open to.

  For this reason, compared with the case where the opening direction of the exhaust port and the extending direction of the virtual line that has passed through the opening of the diffuser coincide with each other, the region where the virtual line and the opening surface of the exhaust port intersect is defined. Can be small. Thereby, the amount of offset between the opening of the diffuser and the exhaust port of the muffler can be reduced.

  As described above, in the bumper-integrated muffler structure according to claim 1 of the present invention, the opening of the diffuser and the exhaust port of the muffler are offset between the diffuser and the muffler provided in the bumper. By providing the extension portion, the exhaust port of the muffler can be removed from the view when looking into the diffuser from the rear of the vehicle.

  For this reason, the problem that the exhaust port can be seen in the diffuser as in the conventional case where the center axis of the diffuser and the central axis of the exhaust port of the muffler coincide with each other can be solved.

  Thereby, the appearance quality of the bumper from the rear of the vehicle can be improved, and the design can be improved.

  In the bumper-integrated muffler structure according to claim 2, a bent portion is set in an extension portion provided between the diffuser and the muffler, and the opening portion of the diffuser and the exhaust port of the muffler are connected to the extension portion. By providing a wall portion that intersects the imaginary line, it is possible to prevent the imaginary line that passes through the opening of the diffuser and extends forward of the vehicle from directly reaching the exhaust port.

  For this reason, the diffuser is moved to a position where the imaginary line extending in the vehicle longitudinal direction passing through the opening of the diffuser and the imaginary line extending in the vehicle longitudinal direction passing through the exhaust port of the muffler do not overlap. Compared with the case where the opening of the muffler and the exhaust port of the muffler must be offset, the offset amount of the opening of the diffuser and the exhaust port of the muffler can be reduced, and space saving Can be achieved.

  Furthermore, in the bumper-integrated muffler structure according to claim 3, the central axis of the exhaust port of the muffler is inclined with respect to an imaginary line that passes through the opening of the diffuser and extends forward of the vehicle. The opening direction opens obliquely with respect to the virtual line.

  For this reason, compared with the case where the opening direction of the exhaust port and the extending direction of the virtual line that has passed through the opening of the diffuser coincide with each other, the region where the virtual line and the opening surface of the exhaust port intersect is defined. Can be small. Thereby, the offset amount of the opening of the diffuser and the exhaust port of the muffler can be reduced, and space saving can be achieved.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a view showing an integrated muffler 1 as a bumper-integrated muffler having a bumper-integrated muffler structure according to the present embodiment. FIG. 1 (b) shows a vehicle 2 having the integrated muffler 1. The back of is shown.

  That is, a rear bumper 11 is provided at the rear end portion of the vehicle 2 as shown in FIGS. 1 and 2, 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.

  As shown in FIGS. 2 and 3, a bumper fixing piece 22 extending toward the vehicle front FR is provided on the lower edge flange 21 of the rear bumper 11, and the bumper fixing piece 22 includes a vehicle body. Bolt insertion holes through which the bolts 23 and 23 are inserted at the time of fixing are provided. As shown in FIG. 1, a laterally long exhaust part 24 is opened at both ends of the rear bumper 11 (shown only on the left side), and a bumper diffuser 25 is provided in the exhaust part 24. Yes.

  As shown in FIGS. 1 to 3, the bumper diffuser 25 is connected to a bumper diffuser extension 31 constituting an extension portion, and the bumper diffuser extension 31 is formed in a cylindrical shape. A muffler 32 is connected to the bumper diffuser extension 31, and a muffler exhaust port 33 opened at an end of the muffler 32 is connected to the bumper provided in the rear bumper 11 via the bumper diffuser extension 31. Connected to the diffuser 25.

  The bumper diffuser 25 is made of stainless steel, and the bumper diffuser 25 includes a rectangular tubular part 41 disposed in the exhaust part 24 and a rear end part of the tubular part 41. And a flange portion 42 extending to the bottom. The left and right side surfaces 42 and 43 of the cylindrical portion 41 (see FIG. 2) are provided with fixing brackets 44 and 44 extending laterally, and the fixing brackets 44 and 44 are fixing flanges of the rear bumper 11. It is comprised so that it may be bolted to 45,45.

  The bumper diffuser extension 31 is connected to the tubular portion 41 of the bumper diffuser 25, and the bumper diffuser extension 31 is made of stainless steel. As shown in FIG. 3, the bumper diffuser extension 31 includes a rear component 51 constituting the vehicle rear RR side connected to the bumper diffuser 25 and a front component 52 constituting the vehicle front FR side. The fixing bracket 53 provided on the front component 52 is fastened to the vehicle body together with the bumper fixing piece 22 of the rear bumper 11.

  The rear component 51 is configured such that its width dimension becomes narrower toward the vehicle front FR, and the inner side wall surface 61 as a wall portion located on the vehicle center 0X side is closer to the vehicle front FR. It inclines toward the vehicle side S. A bent portion 62 bent toward the vehicle center 0X side is set on the vehicle front FR side in the front component portion 52, and the bumper diffuser extension 31 is formed in a curved shape as a whole.

  Further, the front end of the front component 52 of the bumper diffuser extension 31 is open, and the front end opening 71 opens obliquely toward the vehicle center 0X side. The end portion of the muffler 32 is loosely fitted in the front end opening portion 71 of the bumper diffuser extension 31, and the muffler exhaust port 33 of the muffler 32 is located in the front configuration portion 52 of the bumper diffuser extension 31. While opening, the opening surface of the muffler exhaust port 33 is arranged on the vehicle front FR side from the inner side wall surface 61 of the rear component 51.

  As a result, as shown in FIG. 1A, the center line 82 of the diffuser opening 81 opened at the rear end of the bumper diffuser 25 and the center line 83 of the muffler exhaust port 33 of the muffler 32 are offset. As shown in FIG. 3, the muffler exhaust port 33 is disposed, and as shown in FIG. 3, the muffler exhaust port 33 passes through the diffuser opening 81 of the bumper diffuser 25 and extends in the vehicle front-rear direction. , A part of the imaginary lines 85 are configured to intersect the inner side wall surface 61 formed in the rear component 51 of the bumper diffuser extension 31. Further, the other virtual lines 85,... Are configured to intersect with the inner surface of the bumper diffuser extension 31, and all the virtual lines 85,. It is configured not to reach the mouth 33 directly.

  As shown in FIG. 1, the muffler 32 includes an exhaust pipe 91 connected to the engine, a silencer 92 connected to the exhaust pipe 91, and an extension that curves and extends from the silencer 92. A pipe 93 is provided, and the tip of the extension pipe 93 is loosely fitted to the bumper diffuser extension 31 as shown in FIGS. The central axis 94 of the muffler exhaust port 33 at the end of the extension pipe 93 (see FIG. 3) is disposed so as to coincide with the central axis of the front end opening 71 of the bumper diffuser extension 31, and the muffler The opening direction of the muffler exhaust port 33 is set so that the central axis 94 of the exhaust port 33 is inclined with respect to the virtual line 85.

  In the present embodiment having the above configuration, between the bumper diffuser 25 and the muffler 32 provided in the rear bumper 11, the diffuser opening 81 of the bumper diffuser 25 and the muffler exhaust port 33 of the muffler 32 are provided. A bumper diffuser extension 31 to be offset is provided, and imaginary lines 85 passing through the diffuser opening 81 and extending to the vehicle front FR do not reach the muffler exhaust port 33 directly. ing. Thereby, the muffler exhaust port 33 can be removed from the field of view when looking into the bumper diffuser 25 from the vehicle rear RR.

  Therefore, the problem that the muffler exhaust port 33 can be seen in the bumper diffuser 25 as in the prior art, in which the center line 82 of the bumper diffuser 25 and the center line 83 of the muffler exhaust port 33 coincide with each other, is solved. be able to. Thereby, the external appearance quality of the said bumper 11 from vehicle rear FR can be improved, and the design property can be improved.

  Also, a bent portion 62 is set in the bumper diffuser extension 31, and an inner side wall surface that intersects the virtual line 85,... Connecting the diffuser opening 81 and the muffler exhaust port 33 to the bumper diffuser 31. By providing 61, it is possible to prevent the virtual lines 85,... Extending through the diffuser opening 81 and extending to the vehicle front FR from directly reaching the muffler exhaust port 33.

  Therefore, a first imaginary line extending in the vehicle front-rear direction passing through the diffuser opening 81 of the bumper diffuser 25 and a second imaginary line extending in the vehicle front-rear direction passing through the muffler exhaust port 33 are provided. Assuming that the diffuser opening 81 and the muffler exhaust port 33 must be offset to a position where the passage areas of the first and second imaginary lines do not overlap, the diffuser opening 81 And the muffler exhaust port 33 in the vehicle width direction can be reduced, the installation space in the vehicle width direction can be reduced, and the space can be saved.

  Further, the central axis 94 of the muffler exhaust port 33 is inclined with respect to an imaginary line 85,... That passes through the diffuser opening 81 and extends to the vehicle front FR. The opening direction opens obliquely with respect to the virtual lines 85.

  For this reason, compared with the case where the opening direction of the muffler exhaust port 33 coincides with the extending direction of the virtual lines 85 passing through the diffuser opening 81, the virtual lines 85,. And the area where the opening surface of the muffler exhaust port 33 intersects can be reduced. Thereby, the offset amount to the vehicle width direction of the said diffuser opening part 81 and the said muffler exhaust port 33 can be made small, the installation space of a vehicle width direction can be made small, and space saving can be achieved.

  In the present embodiment, the case where the diffuser opening 81 and the muffler exhaust port 33 are offset in the vehicle width direction has been described as an example, but the present invention is not limited to this. It may be offset in the direction.

(A) is a top view which shows one embodiment of this invention, (b) is a figure which shows the rear part of the vehicle. It is a perspective view which shows the state which looked at the principal part of the embodiment from the inside. It is an enlarged view which shows the principal part of the embodiment. (A) is sectional drawing which shows the conventional bumper integrated muffler, (b) is a figure which shows the rear part of the vehicle.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Integrated muffler 11 Rear bumper 25 Bumper diffuser 31 Bumper diffuser extension 32 Muffler 33 Muffler exhaust 61 Inner side wall surface 62 Bending part 81 Diffuser opening part 85 Virtual line 94 Center axis

Claims (3)

In the bumper integrated muffler structure in which the exhaust port of the muffler is connected to the diffuser provided in the bumper at the rear of the vehicle,
An extension portion for offsetting the opening of the diffuser and the exhaust port of the muffler so that a virtual line extending through the opening of the diffuser and extending forward of the vehicle does not directly reach the exhaust port of the muffler A bumper-integrated muffler structure provided between the muffler and the diffuser.   The extension portion is formed in a cylindrical shape provided with a bent portion, and a wall portion intersecting with the imaginary line connecting the opening portion of the diffuser and the exhaust port of the muffler is set as the extension portion. The bumper-integrated muffler structure according to claim 1. The bumper-integrated muffler structure according to claim 1 or 2, wherein an opening direction of the exhaust port is set so that a central axis of the exhaust port of the muffler is inclined with respect to the imaginary line.

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