JPH06248945A - Exhaust pipe fitting device for automobile - Google Patents

Abstract

PURPOSE:To simplify the fitting structure of a mount rubber cover used for thermal insulation for a mount rubber interposed between an exhaust pipe and a body side member. CONSTITUTION:In an automobile in which an exhaust pipe 4 is supported by a bracket 20 being a body side member, via a mount rubber 15, a mount rubber cover 22 is jointly fastened by a bolt 14 fixing the mount rubber 15 to the exhaust pipe 4. Consequently, the mount rubber cover 22 can be supported without depending on welding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust pipe mounting device for automobiles, which is applied to passenger cars and other automobiles.

[0002]

2. Description of the Related Art An exhaust pipe connected to an engine of an automobile has one end connected to an exhaust manifold of the engine and the other end reaching a tail pipe through a catalyst device and a muffler. Connections to the exhaust manifold of the engine are made on the sides of the engine, and connections to the catalytic device or muffler are made below the engine and at the rear of the vehicle body.

FIG. 2 shows the relationship between the engine and the exhaust pipe. In this figure, 1 is an engine, 2 is its exhaust manifold, 3 is an exhaust pipe connected to this exhaust manifold 2, 4 is an exhaust pipe connected to the downstream side of the exhaust pipe 3, and 5 is downstream of the exhaust pipe 4. It is a muffler connected to the side. In the illustrated example, the exhaust pipe 4 is bent in a V shape, and the flanges 6 and 7 provided at both ends thereof are oriented in a non-parallel state.

The flange 6 is connected to the flange 8 of the exhaust pipe 3 with a bolt (not shown) via a seal ring 9, and the flange 7 is connected to the flange 10 of the muffler 5 with a bolt (not shown) via a seal ring 11. Exhaust pipe 4
The shape of the letter 2 means that the exhaust pipe 4 is connected to both ends of the pipe 2.
This is to absorb the individual seal rings 9 and 11 when they vibrate in any of the front-back direction, the lateral width direction, and the vertical direction with respect to the vehicle body (not shown).

Since the exhaust pipes 3 and 4 are connected to the engine 1 and are supported by the vehicle body as described above, the vibrations received from the engine 1 side are transmitted to the vehicle body side. Therefore, although not shown in FIG. 2, a mount rubber is interposed in the support portion of the exhaust pipes 3, 4 to the vehicle body so that the mount rubber absorbs the vibration of the exhaust pipes 3, 4. ing.

In this case, since the exhaust pipe becomes considerably hot during engine operation, it is necessary to prevent the mount rubber from coming into direct contact with the exhaust pipe and prevent deterioration of the rubber. Therefore, a technique in which a rod-shaped hanger is provided between the mount rubber and the exhaust pipe is disclosed in Japanese Utility Model Laid-Open No. 3-77018. According to this technique, the heat radiated from the exhaust pipe is dissipated into the outside air at the rod-shaped hanger portion, so that it is hardly transmitted to the mount rubber.

In addition, the deterioration of the rubber can be prevented by covering the mount rubber with the cover instead of using the rod-shaped hanger. When the clearance between the mount rubber and the road surface is reduced due to the layout, it is necessary to attach a guard to prevent the rubber from breaking due to contact with the road surface during traveling.

[0008]

When the cover is mounted on the mount rubber in this way, it is generally attached by welding to either the vehicle body side or the exhaust pipe (including the muffler forming a part of the exhaust system). It will be. Therefore, this welding increases the man-hours and the cost.

The present invention has been made in view of this point, and an object of the present invention is to provide a technique for attaching a mount rubber cover to a mount rubber without using welding.

[0010]

Means for Solving the Problems As a means for solving the above problems, the present invention provides a vehicle in which an exhaust pipe is supported by a vehicle body side member through a mount rubber, by a bolt for mounting the mount rubber to the exhaust pipe. , The mount rubber cover is tightened together.

[0011]

With this structure, since the mount rubber is covered with the mount rubber cover, the heat transfer from the exhaust pipe is blocked.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. A bracket 12 having a U-shape is attached to the outer peripheral portion of the exhaust pipe 4 near the flange 6 by welding.
A screw hole 13 is formed in the central flat portion of the bracket 12 so that the tip of a bolt 14 can be screwed.
Reference numeral 15 is a mount rubber, and two brackets 16 and 17 are provided so as to face the central portion.

These brackets 16, 17 have holes 18, 19 in them.
Is provided in the hole 18 of the bracket 16 located at the upper side in the drawing, and a cylindrical bracket 20 that is a vehicle body side member is provided.
Are fitted and attached. A spacer 21 into which a bolt 14 is inserted is fitted into a hole 19 of a bracket 17 located below in the figure.

A mount rubber cover 22 covers the mount rubber 15 from the exhaust pipe 4 side. The mount rubber cover 22 is provided with a hole 23 at a position corresponding to the hole 13 of the bracket 12 so that the bolt 14 can pass therethrough. The spacer 21 fits into the hole 19 provided in the bracket 17 of the mount rubber 15, and the bolt 14 fits into this spacer.
21, hole 19 of bracket 17, hole 23 of mount rubber cover 22
Through and is screwed into the screw hole 13 of the bracket 12. As a result, the mount rubber cover 22 is attached together by the bolts 14 for attaching the mount rubber 15 to the exhaust pipe 4.

According to such a mounting structure, since the mount rubber 15 is interposed between the exhaust pipe 4 and the tubular bracket 20 which is the vehicle body side member, the vibration of the mount rubber 15 is caused. It will be absorbed by the change in elasticity. Since the mount rubber cover 22 is interposed between the mount rubber 15 and the exhaust pipe 4, the mount rubber 15 is attached to the exhaust pipe 4.
Not affected by heat from the side.

In the illustrated embodiment, the mount rubber cover
As the member 22, a member having a notched upper portion is used, but a member having a shape that covers the exhaust pipe 4 side and the entire circumference of the mount rubber 15 may be used. However, in this case, it is necessary that the mount rubber cover 22 does not interfere with the function of the mount rubber 15.

[0017]

Since the present invention is the exhaust pipe mounting device for an automobile constructed as described above, the conventional welding can be performed by fastening the mount rubber cover to the mount rubber together with the same bolt. This eliminates the need for man-hours and cost for assembly work. Further, in the portion using the same mount rubber, the same member can be shared. Further, the flexibility of the material, plate thickness, surface treatment, etc. of the mount rubber cover is increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention in a partially disassembled state.

FIG. 2 is a perspective view showing an exhaust system of the engine in a partially disassembled state.

[Explanation of symbols]

 1 Engine 2 Exhaust Manifold 4 Exhaust Pipe 12 Bracket 13 Screw Hole 14 Bolt 15 Mount Rubber 16 Bracket 17 Bracket 19 Hole 20 Bracket 22 Mount Rubber Cover 23 Hole

Claims (1)

[Claims] 1. An exhaust pipe mounting for an automobile, wherein an exhaust pipe is supported by a vehicle body side member through a mount rubber, and a mount rubber cover is fastened together with a bolt for mounting the mount rubber to the exhaust pipe. apparatus.