JPS595622Y2 - Exhaust pipe support device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an exhaust pipe support device.

Conventionally, when an exhaust pipe is attached to a vehicle body, a number of support devices are used.

The support device and the exhaust pipe are fixed by welding, but the exhaust pipe and the support device may be made of different materials and plate thicknesses, and therefore have different coefficients of thermal expansion, so cracks may occur near the welds. may occur.

For example, when welding a belt-shaped support device to an exhaust pipe as shown in Utility Model Application No. 49-57708, if one end of the belt-shaped support device is first welded and fixed to the exhaust pipe, the heat from welding will cause the exhaust pipe to and the strip support device undergoes thermal expansion.

After that, the other end of the band-shaped support device is welded and completely fixed to the exhaust pipe.

After this, when the welding heat is taken away by the atmosphere, etc., the exhaust pipe and support device each try to return to the length before welding, but the ratio of thermal contraction of the exhaust pipe to that of the support device is the same as that of the respective thermal expansions. Since the heat shrinkage increases, displacement stress is applied to the exhaust pipe or the supporting device, which causes cracks to occur.

The purpose of the present invention is to eliminate the above-mentioned drawbacks by creating a support device that allows thermal expansion that occurs during welding without difficulty, and also allows the exhaust pipe and the support device itself to undergo thermal contraction without difficulty. The goal is to

The present invention is characterized in that a groove is provided in the center of the support device over the entire welded portion of the support device.

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

FIG. 1 shows a state in which an exhaust pipe 2 connected to an exhaust manifold 1 is supported by a vehicle body 10 by a support device 3. As shown in FIG.

FIG. 2 shows an enlarged view of the welded portion 5 between the exhaust pipe 2 and the support device 3, and a groove 4 is provided in the center of the support device over the entire area of the welded portion 5.

Next, the operation will be described. When the support device 3 is brought into contact with the exhaust pipe 2 and the left side in the figure is welded, the exhaust pipe 2 expands to the left and right across the welded portion due to welding heat.

Further, in the support device 3, the welded portion also expands to the right.

After that, when the right side of the support device 3 is welded, the exhaust pipe 2 expands laterally at the welded portion.

Further, in the support device 3, the welded portion also expands to the left.

After that, when the welding heat is removed to the atmosphere etc., the exhaust pipe 2 and the support device 3 undergo thermal contraction. Since the groove 4 is also provided, it can freely contract toward the left and right welding parts.

With the above structure and operation, the present invention prevents cracks from occurring in the exhaust pipe and the support device due to the heat shrinkage effect caused by welding, even if the materials and plate thicknesses are different when welding the support device to the exhaust pipe. can.

Further, in the present invention, only one groove is provided in the center of the supporting device in the illustrated embodiment, but the present invention is not limited to this, and a plurality of grooves may be provided.

Furthermore, the groove does not necessarily have to be centrally located.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the relationship between the exhaust pipe and the support device according to one embodiment of this invention, and Fig. 2 is an enlarged front view showing the welded part of the exhaust pipe and the support device in Fig. 1 in an enlarged manner. Figure, Figure 3 is, Figure. 2...Exhaust pipe,...Welded part. Side surface shown in partial cross section in Fig. 2 3...Support device, 4...Groove,

Claims (1)

[Scope of utility model registration request] In a belt-shaped support device in which one end of the belt-shaped piece is shaped to follow the side surface of the exhaust pipe, both edges of which are integrally welded to the exhaust pipe, and the other end is detachable from the vehicle body, the welded belt-shaped piece An exhaust pipe support device characterized in that a longitudinal opening is provided in the middle width part of the exhaust pipe support device.