JP6439276B2 - Hanger bracket mounting structure - Google Patents

Description

  The present invention relates to a hanger bracket mounting structure including a hanger bracket that is disposed at the rear of a vehicle and supports an exhaust pipe.

  The vehicle includes an exhaust pipe (muffler) for exhausting exhaust gas from the engine. The exhaust pipe becomes a vibration source due to vibration accompanying exhaust. Therefore, the exhaust pipe is normally supported by a hanger bracket at the rear of the vehicle, and vibration is suppressed. The hanger bracket includes an attachment portion attached to the vehicle structure and a support portion that supports the exhaust pipe.

  The attachment portion of the hanger bracket needs to be attached to a highly rigid vehicle structure in order to insulate or reduce vibration input from the exhaust pipe serving as the excitation source to the vehicle body. Otherwise, the vehicle body vibrations and abnormal noise resulting from the vibration of the exhaust pipe will be generated, and the vehicle occupant will also experience discomfort such as chatter.

  Patent Document 1 discloses a mounting structure for an exhaust system support member of a vehicle. This vehicle includes a cross member that is joined to the rising portion of the floor panel and extends in the vehicle width direction. The exhaust system support member has a base end portion (rod) joined to the cross member, and a distal end portion provided with an elastic member. The exhaust system support member supports the exhaust pipe via the elastic member and the attachment hook.

  According to Patent Document 1, with this configuration, the mounting rigidity of the exhaust system support member is improved, the vibration of the exhaust system is less likely to be transmitted to the vehicle body, and the NV (Noise and Vibration) performance of the vehicle can be improved. Yes.

  Patent Document 2 discloses an automobile muffler support structure. A towing hook bracket is joined to a rear end portion of the floor side member of the automobile. The muffler support structure includes the towing hook bracket, a muffler hanger rod having a base end joined to the towing hook bracket, and a hanger rubber provided at the tip of the muffler hanger rod. The muffler support structure supports the muffler via the hanger rubber and bolts.

  According to Japanese Patent Laid-Open No. 2004-260, this configuration allows vibration from the muffler to be transmitted to the floor side member instead of the floor panel, which is advantageous in terms of seismic protection.

JP 2006-327555 A Japanese Patent Laid-Open No. 6-328954

  As in Patent Documents 1 and 2, the attachment portion of the hanger bracket is often attached to a cross member or a side member. However, simply attaching the attachment portion of the hanger bracket to such a member cannot sufficiently suppress vibration transmitted from the exhaust pipe to the hanger bracket.

  Moreover, the attachment part of a hanger bracket may have to be attached to members, such as a back panel which forms the lower part of a vehicle rear surface on a layout. However, the rigidity of the back panel is not so high, and vibrations may not be suppressed. In such a case, it is necessary to take measures such as adding a reinforcing member to secure rigidity or adding a bead to the mounting surface of the hanger bracket. However, there have been problems such as an increase in vehicle weight due to the reinforcing member and insufficient rigidity even if beads are added.

  SUMMARY OF THE INVENTION In view of such problems, the present invention has an object to provide a hanger bracket mounting structure that can suppress vibration and abnormal noise of a vehicle body caused by vibration of an exhaust pipe without increasing the vehicle weight. Yes.

  In order to solve the above-described problems, a typical structure of a hanger bracket mounting structure according to the present invention is a hanger bracket mounting structure that includes a hanger bracket that is disposed at the rear of a vehicle and supports an exhaust pipe, and forms a lower portion of the rear surface of the vehicle. The hanger bracket further includes a back panel and a rear side member that is long in the vehicle front-rear direction and whose rear end surface is in contact with the front surface of the back panel, and the hanger bracket supports the exhaust pipe and a mounting portion that is attached to the rear surface of the back panel. The mounting portion of the hanger bracket is attached to the back panel so that at least part of the mounting portion of the hanger bracket overlaps with the rear end surface of the rear side member when viewed from the vehicle front-rear direction or in the vicinity of the rear end surface. Features.

  Since the back panel is a member having a small thickness in the vehicle front-rear direction, it cannot be said that the back panel has high rigidity with respect to a load in the vehicle front-rear direction (plane perpendicular direction). However, in the above-described configuration of the present invention, the rear end surface of the rear side member that is long in the vehicle front-rear direction is joined to the front surface of the back panel, so that the rigidity with respect to the load in the vehicle front-rear direction is remarkably high in that portion. .

  The attachment portion of the hanger bracket is attached to a portion of the back panel that is highly rigid with respect to the load in the vehicle front-rear direction, that is, the rear end surface or the vicinity thereof. Therefore, the vibration transmitted from the exhaust pipe to the hanger bracket is suppressed by the back panel, thereby suppressing transmission to the vehicle body. Moreover, according to the said structure, since it is not necessary to add the reinforcement member for ensuring rigidity, a vehicle weight is not increased.

  Therefore, according to the present invention, it is possible to suppress the vibration and abnormal noise of the vehicle body caused by the vibration of the exhaust pipe without increasing the weight of the vehicle, and to reduce discomfort such as chatter to the vehicle occupant.

  The rear side member may have an outer flange from the rear end surface, and the flange and the mounting portion of the hanger bracket may be integrally joined with the back panel sandwiched from the vehicle front-rear direction.

  According to such a configuration, the integrity of the hanger bracket, the back panel, and the rear side member is improved, and the vibration of the exhaust pipe is suppressed by the back panel and the rear side member via the mounting portion of the hanger bracket. Therefore, the phenomenon that only the hanger bracket and the back panel vibrate due to the vibration of the exhaust pipe can be prevented.

  The support part of the hanger bracket is in the shape of a rod, and the attachment part of the hanger bracket is attached to one end of the support part of the hanger bracket and is a region on both sides of the longitudinal axis of the support part and the junction point to the back panel It is preferable that the rear end face be located between these regions. Thereby, the vibration of the exhaust pipe is suppressed by the back panel and the rear side member in a well-balanced manner through the mounting portion of the hanger bracket, so that the vibration and deformation of the hanger bracket can be prevented.

  The attachment part of the said hanger bracket has a larger area than a rear-end surface, and it is good to be attached so that a rear-end surface may be covered. Thereby, the vibration of the exhaust pipe can be suppressed by the back panel and the rear side member via the mounting portion of the hanger bracket having a large area.

  The longitudinal axis of the support portion of the hanger bracket may overlap the rear end surface. Thereby, the vibration of the exhaust pipe can be more reliably suppressed by the back panel and the rear side member via the mounting portion of the hanger bracket.

  ADVANTAGE OF THE INVENTION According to this invention, the hanger bracket attachment structure which can suppress the vibration and abnormal noise of a vehicle body resulting from the vibration of an exhaust pipe can be provided, without increasing a vehicle weight.

It is the perspective view which looked at the hanger bracket attachment structure concerning the embodiment of the present invention from the vehicles back. It is the perspective view which expanded the hanger bracket attachment structure of FIG. It is a perspective view except a hanger bracket in FIG. It is the perspective view which permeate | transmitted a part of FIG. 2 and expanded the principal part. It is a perspective view which shows the hanger bracket attachment structure concerning the modification which deform | transformed embodiment of FIG. It is a perspective view which shows the hanger bracket attachment structure concerning a comparative example.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a perspective view of a hanger bracket mounting structure 100 according to an embodiment of the present invention as viewed from the rear of a vehicle 200. FIG. 1 is a diagram in which the hanger bracket mounting structure 100 is applied to the right side of the vehicle 200, and some components and reference numerals of the vehicle 200 are omitted for convenience.

  FIG. 2 is an enlarged perspective view of the hanger bracket mounting structure 100 of FIG. In FIG. 2, in order to explain the overlapping of a plurality of members, the back panel 104 is shown in a transparent state using hatched portions. The double arrows indicate the vehicle front (F) and the vehicle rear (R).

  As shown in FIG. 1, the hanger bracket mounting structure 100 includes a hanger bracket 102 that is disposed at the rear of the vehicle 200 and supports an exhaust pipe (not shown). As shown in FIG. 2, the hanger bracket mounting structure 100 further includes a back panel 104 that forms a lower portion of the rear surface of the vehicle 200, and a rear side member 106 that is long in the vehicle front-rear direction. A rear end surface of the rear side member 106 is in contact (or joined) with the front surface of the back panel 104.

  The hanger bracket 102 includes a bracket patch 102a as an attachment portion attached to the rear surface of the back panel 104, and a support portion 102b that supports the exhaust pipe. In this embodiment, the bracket patch 102a has a substantially rectangular flat plate shape. The support portion 102b has a rod shape bent or curved into a predetermined shape. The back panel 104 is joined while being sandwiched between the bracket patch 102 a and the rear side member 106.

  In the present embodiment, the hanger bracket 102 is configured by joining different members such as a bracket patch 10a as an attachment portion and a support portion 102b. However, these members may be integrally formed.

  As shown in FIG. 2, in this embodiment, a bracket patch 102a is attached to one end of the support portion 102b of the hanger bracket 102, and the support portion 102b extending therefrom extends toward the vehicle front (F) after being bent. The exhaust pipe (not shown) disposed on the lower surface of the vehicle is supported.

  For example, a rubber-like mount (not shown) is provided at the tip of the support portion 102b of the hanger bracket 102 extending toward the front of the vehicle, and the exhaust pipe is supported by the rubber-like mount so as to be lifted.

  FIG. 3 is a perspective view of FIG. 2 with the hanger bracket 102 removed. FIG. 4 is a perspective view in which a main part is enlarged by transmitting a part of FIG.

  As shown in FIGS. 3 and 4, the rear side member 106 has a U-shaped cross section with the upper surface portion opened. However, the opened upper surface portion of the rear side member 106 is closed by the rear floor panel 110, so that a closed cross section is formed.

  As shown in FIGS. 3 and 4, the rear side member 106 has three flanges 106 a outside the rear end surface 120. These flanges 106a spread from the three sides of the U-shaped cross section. In FIG. 3, for convenience of illustration, only one flange is represented by reference numeral 106a as a representative of three flanges. The flange 106a of the rear side member 106 shown in FIG. 3 and the bracket patch 102a of the hanger bracket 102 shown in FIG. 4 are integrally joined with the back panel 104 interposed therebetween from the vehicle front-rear direction.

  According to this configuration, the integrity of the hanger bracket 102, the back panel 104, and the rear side member 106 is improved, and vibration of the exhaust pipe is suppressed by the back panel 104 and the rear side member 106 via the bracket patch 102a of the hanger bracket 102. Is done. Therefore, the phenomenon that only the hanger bracket 102 and the back panel 104 vibrate due to the vibration of the exhaust pipe can be prevented.

  As shown in FIG. 4, the bracket patch 102a of the hanger bracket 102 is attached to the back panel 104 so as to overlap the rear end surface 120 of the rear side member 106 when viewed from the vehicle front-rear direction. The rear end surface 120 is a U-shaped cross-sectional portion of the rear side member 106 that is in contact with the front surface of the back panel 104 instead of a welded portion. The bracket patch 102 a may be attached so as to at least partially overlap the rear end surface 120, and may be attached in the vicinity of the rear end surface 120 without overlapping the rear end surface 120.

  As shown in FIG. 4, in this embodiment, the bracket patch 102 a of the hanger bracket 102 has a larger area than the rear end surface 120 of the rear side member 106 and is attached so as to cover the rear end surface 120. As a result, the vibration of the exhaust pipe is suppressed by the back panel 104 and the rear side member 106 via the bracket patch 102 a having a large area of the hanger bracket 102.

  As shown in FIG. 4, the bracket patch 102 a of the hanger bracket 102 is joined to the back panel 104 at joining points 122 and 124 that are respectively provided in regions 121 and 123 on both sides of the longitudinal axis 130 of the support portion 102 b. The rear end face 120 is located between the joint points 122 and 124. As a result, the vibration of the exhaust pipe is suppressed by the back panel 104 and the rear side member 106 in a balanced manner via the bracket patch 102a of the hanger bracket 102, so that the vibration and deformation of the hanger bracket 102 can be prevented.

  As shown in FIG. 4, the longitudinal axis 130 of the hanger bracket 102 overlaps the rear end surface 120. Thereby, the vibration of the exhaust pipe can be more reliably suppressed by the back panel 104 and the rear side member 106 via the bracket patch 102b of the hanger bracket 102.

  FIG. 5 is a perspective view showing a hanger bracket mounting structure 150 according to a modification of the embodiment of FIG. In the modification shown in FIG. 5, the same reference numerals as those in FIG.

  As shown in FIG. 5, the hanger bracket mounting structure 150 includes a hanger bracket 112 including a substantially triangular flat plate-like bracket patch 112a as a mounting portion and a rod-shaped support portion 112b. A bracket patch 112a is attached to one end of the support portion 112b of the hanger bracket 112, and the support portion 112b extends inward in the vehicle width direction from there to support an exhaust pipe (not shown) disposed on the lower surface of the vehicle.

  Thus, in the modification shown in FIG. 5, the arrangement and shape of the hanger bracket are different from the above embodiment. However, as in the above embodiment, the bracket patch 112a of the hanger bracket 112 partially overlaps the rear end surface 120 of the rear side member 106. In addition, the hanger bracket 112 is joined to the back panel 104 at joint points 126 and 128 respectively provided in regions 125 and 127 on both sides of the longitudinal axis 132 of the support portion 112b. The rear end surface 120 is located between the joint points 126 and 128.

  Therefore, the hanger bracket mounting structure 150 according to the modification shown in FIG. 5 can also exhibit the same effects as the hanger bracket mounting structure 100 according to the above embodiment.

  Next, the effect of the hanger bracket mounting structure 100 of this embodiment is demonstrated, contrasting with a comparative example. FIG. 6 is a perspective view showing a hanger bracket mounting structure 250 according to a comparative example.

  As shown in FIG. 6, the hanger bracket mounting structure 250 according to the comparative example has a hanger bracket 252 that supports an exhaust pipe (not shown), a back panel 254 that forms a lower portion of the rear surface of the vehicle, and a long length in the vehicle longitudinal direction. The rear side member 256 is provided. Rear end member 140 of rear side member 256 is joined to the front surface of back panel 254.

  The hanger bracket 252 includes a bracket patch 252a as an attachment portion attached to the rear surface of the back panel 254, and a support portion 252b that supports the exhaust pipe. The bracket patch 252a has a substantially rectangular flat plate shape.

  However, in this comparative example, the bracket patch 252a of the hanger bracket 252 does not overlap the rear end surface 140 of the rear side member 256 when viewed from the vehicle front-rear direction, and is attached to the back panel 254 at a position away from the rear end surface 140. ing.

  In this case, since the back panel 254 is a member having a small thickness in the vehicle front-rear direction, it cannot be said that the rigidity with respect to the load in the vehicle front-rear direction (perpendicular direction) is high in the vicinity of the bracket patch 252a of the hanger bracket 252. Therefore, the vibration transmitted from the exhaust pipe to the hanger bracket 252 cannot be suppressed only by the back panel 254, and there is a possibility that a large vibration is transmitted to the vehicle body.

  On the other hand, in the embodiment of the present invention and its modification shown in FIGS. 4 and 5, the rear end surface 120 of the rear side member 106 that is long in the vehicle front-rear direction is joined to the front surface of the back panel 104. In the rear end surface 120, the rigidity against the load in the vehicle longitudinal direction is remarkably high.

  The bracket patches 102a and 112a of the hanger brackets 102 and 112 in the embodiment of the present invention and the modified example thereof are attached to a portion of the back panel 104 having high rigidity with respect to the load in the vehicle front-rear direction. Therefore, the vibration transmitted from the exhaust pipe to the hanger brackets 102 and 112 is suppressed by the back panel 104, thereby suppressing transmission to the vehicle body. Moreover, according to the said structure, since it is not necessary to add the reinforcement member for ensuring rigidity, a vehicle weight is not increased.

  Therefore, according to the hanger bracket mounting structures 100 and 150 of the present embodiment, it is possible to suppress the vibration of the vehicle body and the abnormal noise caused by the vibration of the exhaust pipe without increasing the weight of the vehicle. Discomfort such as chatter can be reduced.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  INDUSTRIAL APPLICABILITY The present invention can be used for a hanger bracket mounting structure that includes a hanger bracket that is disposed at the rear of a vehicle and supports an exhaust pipe.

104,254 ... back panel, 106,256 ... rear side member, 106a ... flange, 110 ... rear floor panel, 200 ... vehicle, 102,112,252 ... hanger bracket, 102a, 112a, 252a ... bracket patch (mounting part), 102b , 112b, 252b ... support part, 120, 140 ... rear end face, 122, 124, 126, 128 ... junction, 121, 123, 125, 127 ... region, 130, 132 ... longitudinal axis, 100, 150, 250 ... Hanger bracket mounting structure

Claims (5)

In the hanger bracket mounting structure provided with a hanger bracket arranged at the rear of the vehicle and supporting the exhaust pipe,
A back panel forming the lower part of the rear surface of the vehicle;
A rear side member that is long in the vehicle front-rear direction and whose rear end surface is in contact with the front surface of the back panel;
The hanger bracket includes an attachment portion attached to the rear surface of the back panel, and a rod-like support portion that supports the exhaust pipe,
Mounting portion of the hanger bracket is attached to one end of the supporting portion of the rod-shaped, is mounted in front Symbol back panel so that at least partially overlap the rear end surface of the rear side member as seen from the vehicle longitudinal direction A hanger bracket mounting structure characterized by that.   The rear side member has an outer flange from a rear end surface thereof, and the flange and the mounting portion of the hanger bracket are integrally joined to each other with the back panel interposed from the vehicle front-rear direction. The hanger bracket mounting structure according to 1. Mounting portion of the front Symbol hanger bracket has a region having a junction to the supporting part the back panel A the regions on both sides of the longitudinal axis of the rear end face is located between the region The hanger bracket mounting structure according to claim 1 or 2.   4. The hanger bracket mounting according to claim 1, wherein the mounting portion of the hanger bracket has a larger area than the rear end surface, and is mounted so as to cover the rear end surface. Construction.   The hanger bracket mounting structure according to claim 3, wherein a longitudinal axis of a support portion of the hanger bracket overlaps the rear end surface.

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