JP2005098224A - Reinforcing device for muffler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress deformation of cross sections in a peripheral direction of communicating faces by joining reinforcing brackets formed of a plate-shaped member and communicating a muffler with an exhaust pipe protruded from the muffler by the communicating faces in a semi-conical face form to support brackets formed of a bar-shaped or tubular member. <P>SOLUTION: This reinforcing device for the muffler is equipped with the reinforcing brackets having a structure communicating, by the communicating faces in the semi-conical face form, between a large diameter part formed of a plate-shaped member and joined to a peripheral face of the muffler and a small diameter part connected to a peripheral face of the exhaust pipe protruded from the muffler; and with the support brackets formed of the bar-shaped or tubular member and supporting the muffler. Base end parts of the support brackets are linearly formed and extended to outside and the peripheral direction of the communicating faces, and the base end parts are joined to a support rib protruded outwardly from the communicating faces. In addition, in this reinforcing device for the muffler, the base end parts of the support brackets are linearly formed and extended to inside and the peripheral direction of the communicating faces, and the base end parts are joined to both end parts in the peripheral direction of the communicating faces. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a silencer reinforcing device, and more particularly, to a reinforcing bracket that is formed of a plate-like member and communicates between a silencer and an exhaust pipe protruding from the silencer with a semi-conical connecting surface. The present invention relates to a silencer reinforcing device that joins a support bracket formed of a tubular member to suppress deformation of a cross section in the circumferential direction of a communication surface.

  An exhaust system of an automobile is generally provided with a silencer in order to attenuate an exhaust sound when exhausting combustion gas generated in an engine. The silencer is connected to the engine via an inlet side exhaust pipe that is upstream, and an outlet side exhaust pipe is connected to the downstream side, and is attached to the vehicle body via various brackets and the like.

  At this time, when installing the silencer, there are a vehicle body longitudinal direction and the longitudinal direction of the silencer that match, a vehicle body width direction and the silencer longitudinal direction that match, It is necessary to determine the mounting mode in consideration of the layout of the parts.

JP 2003-120282 A Japanese Utility Model Publication No. 60-124526

  By the way, in the conventional silencer reinforcing device, when the outlet side exhaust pipe 106 is connected to the downstream side of the silencer 102, as shown in FIGS. 11 and 12, the silencer 102 leads to the outlet side exhaust pipe 106. In order to improve the rigidity of the place where the cross-sectional shape changes abruptly, a reinforcing bracket 112 is attached so as to straddle both the silencer 102 and the outlet side exhaust pipe 106.

  As shown in FIGS. 11 to 13, a Z-shaped support bracket 114 formed of a rod-like or tubular member for supporting the silencer 102 via a mounting rubber 122 connected to a vehicle body (not shown) is provided. It is desired to set the length of the support bracket 114 as short as possible. However, since the mounting positions of the mounting rubber 122 and the silencer 102 are determined, the support bracket 114 cannot be shortened, and the support bracket 114 is provided. There is an inconvenience that silencer vibration due to lack of rigidity cannot be suppressed.

  Further, as shown in FIG. 11, the reinforcing bracket 112 has a large diameter portion 116 joined to the circumferential surface of the silencer 102 and a small diameter portion 118 connected to the circumferential surface of the outlet side exhaust pipe 106 protruding from the silencer 102. The connection surface 120 of the reinforcing bracket 112 is compressed in the longitudinal direction by the vibration of the outlet side exhaust pipe 106, so that a circular shape is formed at the connection surface 120 portion. There is an inconvenience that the arc-shaped circumferential section is deformed so as to open.

  Conventionally, it has been difficult to suppress such deformation by improving the rigidity of the reinforcing bracket alone.

  Therefore, in order to eliminate the above-mentioned inconveniences, the present invention is connected to a large diameter portion formed of a plate-like member and joined to the peripheral surface of the silencer and a peripheral surface of the exhaust pipe protruding from the silencer. In a reinforcing device for a silencer, comprising: a reinforcing bracket having a structure that communicates with a small-diameter portion by a semiconical connecting surface; and a support bracket that is formed of a rod-like or tubular member and supports the silencer. The base end portion of the support bracket is formed in a straight line so as to extend outside and in the circumferential direction of the communication surface, and the base end portion is joined to a support rib projecting outward from the communication surface. It is characterized by.

  Further, a semi-conical surface-shaped connection is formed between a large-diameter portion formed of a plate-like member and joined to the circumferential surface of the silencer and a small-diameter portion connected to the circumferential surface of the exhaust pipe protruding from the silencer. A silencer reinforcement device comprising a reinforcing bracket having a structure that communicates with a surface and a support bracket that is formed of a rod-like or tubular member and supports the silencer, and the base end of the support bracket is formed in a straight line The base end portion is joined to both end portions of the connecting surface in the circumferential direction, and extends in the circumferential direction of the connecting surface.

  As described above in detail, according to the present invention, a large-diameter portion formed of a plate-like member and joined to the peripheral surface of the silencer, and a small-diameter portion connected to the peripheral surface of the exhaust pipe protruding from the silencer. A silencer reinforcement device comprising: a reinforcing bracket structured to communicate with a semi-conical connecting surface; and a support bracket formed of a rod-like or tubular member to support the silencer. The base end is formed in a straight line and extends outside and in the circumferential direction of the connecting surface, and the base end is joined to the support rib projecting outward from the connecting surface, so the straight line formed on the support bracket The rigidity of the arc-shaped cross section of the reinforcing bracket can be improved by both the base end portion and the support rib projecting from the reinforcing bracket, and deformation in the opening direction can be suppressed.

  Further, a semi-conical communication surface is formed between a large diameter portion formed of a plate-like member and joined to the peripheral surface of the silencer and a small diameter portion connected to the peripheral surface of the exhaust pipe protruding from the silencer. In a silencer reinforcement device comprising a reinforcement bracket structured to communicate with a support bracket and a support bracket formed of a rod-like or tubular member to support the silencer, the base end of the support bracket is formed in a straight line and communicated Since the base end portion is joined to both ends in the circumferential direction of the connecting surface, the opening portion in the circumferential direction of the reinforcing bracket is formed by the linear base end portion formed on the support bracket. It can be connected to improve the rigidity of the arc-shaped cross section of the reinforcing bracket and suppress deformation in the opening direction.

  By inventing as described above, the base end portion of the support bracket is formed in a straight line so as to extend outside and in the circumferential direction of the connecting surface, and the base end portion protrudes outward from the connecting surface. The rigidity of the arc-shaped cross section of the reinforcement bracket is improved by both the linear base end portion formed on the support bracket and the support rib protruding from the reinforcement bracket, and the deformation in the opening direction is suppressed. .

  Further, the base end portion of the support bracket is formed in a straight line so as to extend inside and in the circumferential direction of the connecting surface, and the base end portion is joined to both ends in the circumferential direction of the connecting surface to form a straight line formed on the support bracket. The opening part of the circumferential direction of a reinforcement bracket is connected by the shape base end part, the rigidity of the circular-arc-shaped cross section of a reinforcement bracket is improved, and the deformation | transformation of an opening direction is suppressed.

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

  1 to 8 show a first embodiment of the present invention. 4 and 5, 2 is a silencer, 4 is an inlet side exhaust pipe connected to the upstream side of the silencer 2, and 6 is an outlet side exhaust pipe connected to the downstream side of the silencer 2.

  As shown in FIGS. 4 and 5, the silencer 2 has a downstream end portion of the inlet side exhaust pipe 4 connected to the upstream side, and the first side of the inlet side between the silencer 2 and the inlet side exhaust pipe 4 is connected. The reinforcement bracket 8 communicates with the first reinforcement bracket 8 and the vehicle body side (not shown) by the first support bracket 10 on the inlet side.

  Further, on the downstream side of the silencer 2, as shown in FIGS. 4 and 5, the upstream end of the outlet side exhaust pipe 6 is connected, and an outlet is provided between the silencer 2 and the outlet side exhaust pipe 6. The second reinforcing bracket 12 on the side communicates with the second reinforcing bracket 12 and the vehicle body side (not shown) communicates with the second support bracket 14 on the outlet side.

  At this time, as shown in FIGS. 6 to 8, the second reinforcing bracket 12 is formed from a plate-like member and joined to the circumferential surface of the silencer 2, and the silencer 2. A small-diameter portion 18 connected to the peripheral surface of the projecting outlet-side exhaust pipe 6, and a semi-conical communication surface 20 that communicates between the large-diameter portion 16 and the small-diameter portion 18.

  Further, as shown in FIG. 3, the second support bracket 14 is formed of a rod-like or tubular member, and as shown in FIGS. 1 and 2, the silencer is interposed via a mount rubber 22 that communicates with a vehicle body (not shown). 2 is supported.

  At this time, the base end portion 24 of the second support bracket 14 is formed in a straight line so as to extend outside and in the circumferential direction of the connecting surface 20, and the base end portion 24 is outward from the connecting surface 20. It is configured to be joined to the protruding support rib 26.

  More specifically, the base end portion 24 of the second support bracket 14 is formed linearly as shown in FIG.

  As shown in FIGS. 6 to 8, the connecting surface 20 of the second reinforcing bracket 12 is provided with reinforcing ribs 28 extending in the longitudinal direction and projecting outward, and an intermediate portion of the reinforcing ribs 28. The support ribs 26 are provided in the width direction orthogonal to the longitudinal direction, and the base end portions 24 of the second support brackets 14 are joined to the support ribs 26 so that the base end portions 24 of the second support brackets 14 are joined. Is extended to the outside of the connecting surface 20 and in the circumferential direction (see FIG. 7).

At this time, when joining the base end portion 24 of the second support bracket 14 to the support rib 26, as shown in FIG. 8, a bonding recess 30 is formed on the outer peripheral surface portion of the support rib 26,
The base end portion 24 of the second support bracket 14 is joined to the joining recess 30.

  Further, the opening direction of the connecting surface 20 of the second reinforcing bracket 12 is made to coincide with the axial direction of the second support bracket 14 as shown in FIGS.

  The deflection direction of the connecting surface 20 of the second reinforcing bracket 12 is a direction orthogonal to the longitudinal direction of the reinforcing rib 28 formed on the connecting surface 20 as shown in FIG.

  Next, the operation will be described.

  First, when the outlet side exhaust pipe 6 is connected to the silencer 2, the upstream end of the outlet side exhaust pipe 6 is connected to the downstream side of the silencer 2, as shown in FIGS.

  Further, the support rib 26 formed on the connecting surface 20 having a semi-conical surface connecting the large diameter portion 16 and the small diameter portion 18 of the second reinforcing bracket 12 is shown in FIGS. 1 and 6 to 8. As shown, the base end portion 24 of the second support bracket 14 is joined, and the base end portion 24 of the second support bracket 14 extends outside the connecting surface 20 and in the circumferential direction (see FIG. 7). At the same time, the second support bracket 14 is attached to the second reinforcement bracket 12 so that the opening direction of the connecting surface 20 of the second reinforcement bracket 12 matches the axial direction of the second support bracket 14.

  And while joining the large diameter part 16 of the 2nd reinforcement bracket 12 to the surrounding surface of the said silencer 2, the small diameter part 18 of the 2nd reinforcement bracket 12 is joined to the surrounding surface of the said exit side exhaust pipe 6, and a silencer 2 and the outlet side exhaust pipe 6 are communicated by the second reinforcing bracket 12 on the outlet side.

  The other end of the second support bracket 14 is attached to a mount rubber 22 that communicates with a vehicle body (not shown).

  For reference, if the reinforcement bracket has a semiconical connecting surface between the silencer's peripheral surface and the exhaust pipe's peripheral surface protruding from the silencer, the contact surface is caused by exhaust pipe vibration. Is compressed in the longitudinal direction, it deforms so that an arc-shaped cross section extending in the circumferential direction is opened. Conventionally, it has been difficult to suppress such deformation by improving the rigidity of the reinforcing bracket alone.

  Therefore, in the first embodiment of the present invention, the base end portion 24 of the second support bracket 14 that supports the silencer 2 is formed in a straight line so that the outside of the connecting surface 20 of the second reinforcing bracket 12 and The base end portion 24 extends in the circumferential direction, and the base end portion 24 is joined to a support rib 26 projecting outward from the connecting surface 20, so that the linear base end portion 24 formed on the second support bracket 14 and the The rigidity of the arc-shaped cross section of the second reinforcing bracket 12 can be improved with both of the support ribs 26 projecting from the second reinforcing bracket 12, and deformation in the opening direction can be suppressed.

  Further, since the entire second support bracket 14 is formed in a straight line as shown in FIG. 3, the length of the second support bracket 14 can be reduced by about 55% compared to the conventional one. This can contribute to improving the rigidity of the support bracket 14 and reducing the component cost.

  Further, by making the opening direction of the connecting surface 20 of the second reinforcing bracket 12 coincide with the axial direction of the second support bracket 14, the support rib 26 part serving as the joint part of the second support bracket 14 is provided. By using the second reinforcing bracket 12 as a lean force, the rigidity of the second reinforcing bracket 12 can be further improved.

  Furthermore, since the second support bracket 14 can be partly assembled with the second reinforcing bracket 12 before joining to the silencer 2, the time required to complete the silencer 2 can be shortened. The mounting workability can be improved, and the bonding material of the second support bracket 14 can be downgraded with respect to other bonding points, which can contribute to the reduction of the product unit price.

  9 and 10 show a second embodiment of the present invention. In the second embodiment, portions that perform the same functions as those of the first embodiment will be described with the same reference numerals.

  The second embodiment is characterized in that the base end portion 24 of the second support bracket 14 is formed in a straight line so as to extend inward and in the circumferential direction of the connecting surface 20, and the base end portion 24 is The connection surface 20 is joined to both ends in the circumferential direction.

  That is, the base end portion 24 of the second support bracket 14 is formed linearly as shown in FIG.

  The communication surface 20 of the second reinforcing bracket 32 is provided with reinforcing ribs 28 extending in the longitudinal direction and protruding outward as shown in FIGS.

  At this time, as shown in FIG. 9, the connecting surface 20 of the second reinforcing bracket 32 is formed with a first joint 34 at the upper end and a second joint 36 at the lower end. 9, which is the front part of the base end part 24 of FIG. 14, and the upper part is joined to the first joint part 34, and the lower part is joined to the second joint part 36 in FIG. 9, which is the rear part of the base end part 24 of the second support bracket 14. And the base end part 24 of the 2nd support bracket 14 is joined to the both ends of the circumferential direction of the said connection surface 20. As shown in FIG.

  In other words, in the conventional reinforcing bracket having a structure in which the peripheral surface of the silencer and the peripheral surface of the exhaust pipe protruding from the silencer are connected by a semi-conical connecting surface, the vibration of the exhaust pipe When the connecting surface is compressed in the longitudinal direction, the arc-shaped cross section extending in the circumferential direction is deformed so as to open. In the second embodiment of the present invention, the base end portion 24 of the second support bracket 14 is straight. The second reinforcing bracket 32 is formed in a shape and extends in the inner side and in the circumferential direction of the second reinforcing bracket 32, and the base end portion 24 is joined to both end portions in the circumferential direction of the connecting surface 20. A linear base end portion 24 formed in the support bracket 14 connects the circumferential opening portion of the second reinforcement bracket 32, improves the rigidity of the arc-shaped cross section of the second reinforcement bracket 32, and deforms in the opening direction. Can be suppressed.

  That is, the first joint 34 formed at the upper end of the connecting surface 20 of the second reinforcing bracket 32 is connected to the first joint 34 in FIG. 9 which is the front end of the base end 24 of the second support bracket 14. While joining, the lower part in FIG. 9 which is the rear part of the base end part 24 of the 2nd support bracket 14 is joined to the 2nd junction part 36 formed in the lower end of the connection surface 20, and the said connection surface 20 is connected. The base end portion 24 of the second support bracket 14 is joined to both end portions in the circumferential direction to improve the rigidity of the arc-shaped cross section of the second reinforcing bracket 32 and suppress deformation in the opening direction.

  Further, if the first and second joint portions 24 and 36 are integrally formed on the connecting surface 20 of the second reinforcing bracket 32, the first and second joint portions 24 and 36 can be easily formed. In addition, the support rigidity by the first and second joint portions 24 and 36 can be increased, which is practically advantageous.

  The present invention is not limited to the first and second embodiments described above, and various application modifications can be made.

  For example, in the first embodiment of the present invention, the second support bracket is formed in a rod shape, but the second support bracket side of the second support bracket is deformed to have a special configuration for improving the rigidity of the second reinforcement bracket. It is also possible to do.

  That is, the second reinforcement bracket side end portion of the second support bracket is formed in, for example, an L shape, and the second reinforcement bracket side end portion of the second support bracket is second reinforcing from the edge portion of the second reinforcement bracket. It fixes to a 2nd reinforcement bracket as the state extended in the longitudinal direction of a bracket.

  Alternatively, the second reinforcement bracket side end portion of the second support bracket is formed in a U-shape, and the second support bracket reaches the other edge portion from the one edge portion of the second reinforcement bracket, and then the second reinforcement bracket. The second reinforcing bracket side end portion of the bracket is returned from the other edge portion to the one edge portion.

  If it does so, the junction part of a 2nd support bracket and a 2nd reinforcement bracket can be increased, and the rigidity of a 2nd reinforcement bracket can be improved.

It is a general | schematic enlarged plan view of the connection part of the silencer and exhaust pipe which shows 1st Example of this invention. It is a general | schematic enlarged front view of the connection part of a silencer and an exhaust pipe. It is an enlarged view of a support bracket. It is a schematic plan view which shows a silencer and an exhaust pipe. It is a schematic front view which shows a silencer and an exhaust pipe. It is an enlarged rear view of a reinforcement bracket. It is a side view of the state seen from the left side in FIG. It is sectional drawing by the VIII-VIII line of FIG. It is an expansion rear view of the reinforcement bracket which shows 2nd Example of this invention. It is sectional drawing by the XX line of FIG. It is a general | schematic enlarged plan view of the connection part of the silencer which shows the prior art of this invention, and an exhaust pipe. It is a general | schematic enlarged front view of the connection part of a silencer and an exhaust pipe. It is an enlarged view of a support bracket.

Explanation of symbols

2 silencer 4 inlet side exhaust pipe 6 outlet side exhaust pipe 8 first reinforcement bracket 10 first support bracket 12 second reinforcement bracket 14 second support bracket 16 large diameter part 18 small diameter part 20 contact surface 22 mount rubber 24 base end part 26 Support rib 28 Reinforcing rib 30 Bonding recess

Claims (2)

  A semi-conical connecting surface is formed between a large-diameter portion formed of a plate-like member and joined to the peripheral surface of the silencer and a small-diameter portion connected to the peripheral surface of the exhaust pipe protruding from the silencer. In a silencer reinforcement device comprising a reinforcing bracket having a structure to be connected and a support bracket formed of a rod-like or tubular member and supporting the silencer, the base end of the support bracket is formed in a straight line. An apparatus for reinforcing a silencer, wherein the silencer extends in an outer circumferential direction of the communication surface and is joined to a support rib projecting outward from the communication surface.   A semi-conical connecting surface is formed between a large-diameter portion formed of a plate-like member and joined to the peripheral surface of the silencer and a small-diameter portion connected to the peripheral surface of the exhaust pipe protruding from the silencer. In a silencer reinforcement device comprising a reinforcing bracket having a structure to be connected and a support bracket formed of a rod-like or tubular member and supporting the silencer, the base end of the support bracket is formed in a straight line. An apparatus for reinforcing a silencer, wherein the silencer extends in the circumferential direction of the communication surface and is joined to both ends of the communication surface in the circumferential direction.

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