JP4432705B2 - Exhaust system support device - Google Patents

Description

  The present invention relates to an exhaust system support device.

  Conventionally, an exhaust system of a vehicle equipped with a power source such as an engine is suspended from a vehicle body by a support device provided in the exhaust system. An elastic member such as rubber is interposed between the support device and the vehicle body, and the engine vibration transmitted to the exhaust system is absorbed by the elastic member to suppress transmission of the engine vibration to the vehicle body.

Conventionally, as such an exhaust system support device, a support device in which a metal bar is bent and connected to the vehicle body via an elastic member and a base portion joined to the exhaust system is formed. Has been proposed. (See Patent Documents 1 and 2).
JP 2000-2113 A JP 2003-120282 A

  According to the supporting devices described in Patent Documents 1 and 2, the metal bar material that supports the exhaust system is relatively thin, and can be easily formed into an arbitrary shape, and can be manufactured at low cost. However, it is difficult to improve the strength and rigidity, and when vibration transmitted from the engine to the exhaust system is transmitted to the vehicle body via the support device having low rigidity, the vibration is lodged in the vehicle by low-frequency vibration transmission. There was a problem with sound. For this reason, the exhaust system support device is required to have strength and durability to support the exhaust system for a long period of time. Furthermore, by increasing the rigidity of the support device and the resonance frequency, Therefore, it is required to make it difficult for low-frequency vibrations, which are the cause of the occurrence, to be transmitted to the vehicle body.

  Accordingly, an object of the present invention is to propose an exhaust system support device that can solve the above-described problems.

In order to solve the above problems, the invention according to claim 1 is an exhaust system support device for bending a metal bar and supporting the exhaust system on a vehicle body via an elastic member. and curved along the outer periphery of the definitive in the exhaust system the exhaust pipe, a first support comprising a suspension unit connected to the elastic member with extending from the first base and first base are welded to the exhaust pipe A second support that includes a member, a second base that is curved along the outer periphery of the exhaust pipe, is welded to the exhaust pipe, and a reinforcement is provided that extends from the second base and is welded to the suspension part. An exhaust system support device comprising members.

  In the present invention, each base portion of the first support member and the second support member is joined to the exhaust system, and the reinforcing portion of the second support member is joined to the suspension portion of the first support member. The strength of the suspension portion of the support member is improved, and further, the strength and durability of the entire support device are improved by the two bars of the first support member and the second support member supporting each other. Thereby, the rigidity of the whole support apparatus can be improved.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the metal bar is a pipe-like bar.

  In the present invention, the weight of the support device can be reduced by using a hollow metal pipe.

  According to the first aspect of the present invention, the resonance frequency can be increased by improving the rigidity of the support device, and low-frequency vibrations are difficult to be transmitted to the vehicle body via the support device. Can be suppressed.

  According to the second aspect of the present invention, the hollow metal pipe-like bar is lighter in weight than the solid metal bar, so that the resonance frequency can be increased. Therefore, it is possible to further suppress the booming noise transmitted to the vehicle body via the support device.

BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described based on an embodiment shown in the drawings.
The embodiment shown in the figure is an example in which the exhaust system support device of the present invention is used to support an exhaust pipe in an exhaust system, and a support device 1 having a base side joined to an exhaust pipe 4 is provided on the vehicle body side. The exhaust pipe is connected to the member 5 so as to be suspended.

  The support device 1 includes a first support member 2 formed by bending a metal pipe-shaped bar, and a second support member 3 formed by bending a metal pipe-shaped bar.

  The first support member 2 includes a first base portion 2a that is curved along the circumferential direction of one side A of the outer periphery of the exhaust pipe 4, and upward from the first base portion 2a, as shown in FIG. As shown in FIG. 3, an extension 2b that is inclined to the other side B of the exhaust pipe 4 and extended in the axial direction of the exhaust pipe 4, and a lateral direction (the axis of the exhaust pipe) from the upper end of the extension 2b. The suspension part 2c is formed in a straight line by bending in a direction perpendicular to the core.

  The first base 2a formed at the lower part of the first support member 2 is joined to the exhaust pipe 4 which is a part of the exhaust system in an arc shape by welding W1, and the tip of the suspension part 2c formed at the upper part. Is formed with a locking portion 2d. The locking portion 2d is formed with a tapered tapered surface 2e at the outer periphery and a locking surface 2f having a diameter larger than the outer diameter of the suspension portion 2c at the rear portion. After the portion 2d is inserted into the elastic member 5, the suspension portion 2c is prevented from falling off the elastic member 5.

  The second support member 3 extends along the circumferential direction of the outer periphery of the exhaust pipe 4 on the other side B of the outer periphery of the exhaust pipe 4, that is, on the side facing the first base 2 a of the first support member 2. The second base portion 3a is curved, and the reinforcing portion 3b is bent upward from the second base portion 3a.

  The second base portion 3a formed at the lower portion of the second support member 3 is joined to the exhaust pipe 4 in a circular arc shape by welding W2, and the reinforcing portion 3b of the second support member 3 is a suspended portion 2c in the first support member 2. In addition, it is joined by welding W3 on the side opposite to the locking portion 2d. The joining position of the reinforcing portion 3b is set at a position where the elastic member 5 can be sandwiched between the reinforcing portion 3b and the locking portion 2d.

  The elastic member 5 is formed of an elastic material such as EPDM (ethylene propylene rubber), is disposed between the support device 1 and the vehicle body side, and supports the exhaust system via the support device 1.

  The elastic member 5 is formed with a vehicle body side mounting hole 5a and a support device side mounting hole 5b. The elastic member 5 swings around the axis of the vehicle body side mounting hole 5a. In this manner, a metal bar provided on the vehicle body (not shown) is inserted. Further, the suspension portion 2c of the first support member 2 in the support device 1 is inserted into the support device side mounting hole 5b so that the exhaust pipe 4 is supported by the vehicle body via the first support member 2 and the elastic member 5. It has become.

  As described above, when mounting, the elastic member 5 is inserted into the vehicle body mounting hole 5a through the bar on the vehicle body side, and as shown in FIG. 2, in the support device 1 joined to the exhaust pipe 4. The engaging portion 2d of the first support member 2 is press-fitted into the support device side mounting hole 5b of the elastic member 5 and protrudes to the counter press-fit side as shown in FIG. By this insertion, the reinforcing portion 3b of the second support member 3 is joined to the suspension portion 2c of the first support member 2, whereby the locking portion 2d and the reinforcement portion 3b sandwich the both ends of the elastic member 5, and the suspension portion The movement of 2c in the vehicle width direction can be restricted. Thereby, when an exhaust system such as an exhaust pipe or a silencer is supported by the support device 1, movement of the exhaust system in the vehicle width direction can be restricted. Therefore, this exhaust system can be prevented from interfering with other vehicle parts.

  Further, the support device 1 is configured such that the base portions of the two support members of the first support member 2 and the second support member 3 are joined to the exhaust pipe 4, and the reinforcing portion 3 b of the second support member 3 is first supported. Since it joined to the suspension part 2c of the member 2 and comprised in the 3 point | piece support structure, the intensity | strength and durability of the support apparatus 1 containing the suspension part 2c improve. As described above, by improving the rigidity of the entire support device 1 including the suspension portion 2c, it is possible to suppress the support device 1 from gently oscillating and to increase the resonance frequency. As a result, low-frequency vibration, which is the cause of the in-vehicle noise, is difficult to be transmitted to the vehicle body, and the in-vehicle noise due to the low frequency can be suppressed.

  In the said Example, although the 1st supporting member 2 and the 2nd supporting member 3 were formed using the hollow pipe-shaped bar, you may use a solid-shaped bar.

  Moreover, in the said Example, although the reinforcement part 3b of the 2nd support member 3 was joined to the suspension part 2c of the 1st support member 2, you may join to both the suspension part 2c and the extension part 2b.

  Moreover, in the said Example, although the support apparatus 1 was joined to the exhaust pipe 4 directly by welding W1, W2, you may join via a bracket.

  Furthermore, although the example which supports an exhaust pipe was shown in the said Example, not only an exhaust pipe but the support apparatus 1 of this invention is joined to arbitrary exhaust system components, such as a silencer and a catalytic converter, and an exhaust system is shown. Can be applied to support

The perspective view which shows the Example of the support apparatus of this invention. The figure seen from the arrow C direction of FIG. 1 with the front view which mounted | wore the elastic member in the support apparatus of this invention. The figure seen from the arrow D direction of FIG. 2 with the side view which mounted | wore the elastic member in the support apparatus of this invention. The figure seen from the arrow E direction of FIG. 3 in the top view which mounted | wore the elastic member in the support apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Support apparatus 2 1st support member 2a 1st base 2c Suspension part 3 2nd support member 3a 2nd base 3b Reinforcement part 5 Elastic member

Claims (2)

A discharge system supporting device for supporting the exhaust system to the vehicle body via an elastic member as to form by bending a metal rod, curved along the outer periphery of the exhaust pipe definitive in the exhaust system, the exhaust A first support member having a first base welded to the pipe and a suspension part extending from the first base and connected to the elastic member; and curved along the outer periphery of the exhaust pipe, An exhaust system support device comprising: a second base member welded to a pipe; and a second support member provided with a reinforcement portion extending from the second base portion and welded to the suspension portion. The exhaust system support device according to claim 1, wherein the metal bar has a pipe shape.

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