JPH11141743A - Support structure of piping around engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a support structure of pipes about the engine of an automobile which enables easy work, strong structure and low construction cost. SOLUTION: When a cooling pipe 2 is provided in parallel with the outer wall of an engine main body 1, the intermediate part of the cooling pipe 2 is fixed to a support bracket 8, the protruding part 8a of the support bracket 8 is fixed to the circular hole 9 of the outer wall and both ends of the cooling pipe 2 are fixed to the outer wall by means of screws. When the intermediate part is formed in a bent shape, the position of the bent part is apt to be indefinite and vibration can be easily transmitted. However, the cooling pipe 2 is fixed to the engine main body 1 with this structure, so that this structure is strong to the vibration. Further, the intermediate part is only fitted to the engine main body 1 through the support bracket 8, so that the structure can be manufactured at low cost even when the number of fixing positions is increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION A cooling pipe, a fuel pipe, an exhaust pipe and the like are mounted on an engine of an automobile, and these are fastened at a plurality of places so as to withstand vibration of the engine. The present invention relates to a pipe support structure around an engine which can be firmly mounted when these pipes are long or three-dimensionally bent.

[0002]

2. Description of the Related Art Conventionally, various pipes are provided along the shape of an engine body in an automobile engine. As a fixing means, a general means is to attach brackets to both ends of a pipe around the engine. The bracket is screwed to the engine body (see Japanese Patent Application Laid-Open No. 9-95148). Also, using the engine crankcase cover, etc., make holes in the plate-like projections of the crankcase cover, etc.
Some pipes around the engine are inserted into the holes and supported (see Japanese Utility Model Laid-Open No. 55-80581).

As shown in FIG. 5, when a cooling pipe 2 made of metal is attached to the engine body 1, the cooling pipe 2 is connected to the water pump 3 on the front side of the engine from the rear and is arranged along the engine body 1. Since the cooling pipe 2 maintains its shape even when the intermediate portion is bent, both ends of the cooling pipe 2 are brackets 4.
And is fixed by mounting bolts 5 through the holes. As described above, when the cooling pipes 2 are juxtaposed on the side of the wall surface of the engine body 1, it is difficult to restrict the position of the pipe middle path by the bending shape and weight, and furthermore, due to a twist at the time of bolt tightening and a manufacturing error of the pipe, The middle part may deviate from the design position. In this fastening state, the middle portion of the cooling pipe 2 not only vibrates in the vertical direction but also moves in an arc shape in response to the vibration of the engine, which is not preferable.

As a countermeasure against this, as shown in FIG. 6, usually, the cooling pipe 2 is fastened to the engine body 1 via the bracket 4 at the bent portion, more specifically, at a long side of the cooling pipe 2 with mounting bolts 5 and positioned. It is fixed. Thereby, rigidity is increased and vertical vibration is suppressed.

[0005]

However, in this structure, since the cooling pipe 2 is provided inside the auxiliary machine 6 and the exhaust manifold 7, the operation is troublesome.
A part of the cooling pipe 2 is hidden and difficult to see, and the work of tightening the mounting bolts 5 at the intermediate portion of the cooling pipe 2 is difficult due to a narrow peripheral space. Further, in order to avoid the above-mentioned difficulty, if the bolt is fastened to the intermediate portion first and one of the two ends is tightened, there is a possibility that the position of the other bolt is shifted depending on the shape of the cooling pipe 2. When the assembling work is performed as it is, the alignment of the tightening places and the extension of the tightening work due to the increase of the tightening places decrease productivity. As described above, when the cooling pipe 2 is supported at three points, the cooling pipe 2 becomes firm, but the work efficiency is not increased due to the troublesome fastening work, and the number of bolts is increased.
The number of parts increases, and problems such as increased costs also arise.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pipe supporting structure around an engine which can be easily operated even if the number of fixing portions of the cooling pipe increases and is inexpensive.

[0007]

In order to achieve the above object, according to the present invention, a pipe is juxtaposed on an outer wall side of an engine body, and an intermediate portion of the pipe is supported by a support bracket on the outer wall side. And the both ends of the pipe are screwed to the outer wall.

According to a second aspect of the present invention, in the first aspect of the present invention, an intermediate portion of the pipe is fixed to the support bracket, and a fitting portion of the support bracket with respect to the recess on the side surface of the outer wall has a wide shape in the vertical direction. Features.

According to a third aspect of the present invention, a closed space is formed by arranging pipes side by side on an outer wall side of an engine body, and sandwiching an intermediate portion of the pipes from a lateral direction by a support bracket having a substantially U-shaped cross section by a plate member. And the curved portion of the U-shaped support bracket is fitted into a groove formed on the side surface of the outer wall.

Although the pipe is vibrated by the operation of the engine body, the load increases due to its own weight in a long pipe having both ends fastened. Therefore, when the support bracket is fixed to the intermediate portion and a part of the support bracket is fitted to the engine body with its width increased in the vertical direction, the pipe is held and solidified at three points and has high rigidity in the direction of gravity. Become. When the pipe is bent in an L shape, the position of the bent part may be shifted due to each part, but the support bracket is placed near the bent part and on the side where the span from the other tightening point of the pipe is long. Attach and eliminate. And this attachment structure is applied to various pipes.

[0011]

Embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 1, a rigid metal cooling pipe 2 is bent along a side wall of the engine body 1, and a bracket 4 is provided at both ends of the cooling pipe 2 and fastened to the engine body 1 by mounting bolts 5. The support bracket 8 is fixed to the intermediate portion by welding or brazing. That is, the cooling pipe 2 has the support bracket 8 pressed into the longer pipe side from the bent portion and is fixed to the pipe side.
The protruding portion (fitting portion) 8a is formed to be bent to the engine main body 1 by bending.

As shown in FIG. 2, a circular hole (recess) 9 is formed in a substantially vertical plane of the side wall of the engine body 1 at a position corresponding to the support bracket 8.
8a can be fitted. The protrusion 8a has a wide width a in the vertical direction, and is closely attached to the circular hole 9.

As described above, the cooling pipe 2 which is bent three-dimensionally is likely to be displaced in the position of the bent portion even if both ends are supported, but the vicinity of the bent portion is caused by the support bracket 8 having the protruding portion 8a. By fixing to the main body 1, the bent portion position is fixed to the cylinder main body 1. And the run-out of the cooling pipe 2 in the shear direction due to the operation of the engine can be restricted.

In order to mount the cooling pipe 2, the cooling pipe 2 is disposed behind the auxiliary machine 6 and the exhaust manifold 7, avoiding the auxiliary machine 6 and the exhaust manifold 7, inserting the protrusion 8 a into the circular hole 9, and then screwing both ends.
Therefore, since the added fixed portion is only positioned by the support bracket 8, the work can be easily performed even in a place where a fastening tool does not enter. Further, when the protrusion 8a is inserted into the circular hole 9, the cooling pipe 2 can be rotated about the protrusion 8a, thereby facilitating the assembling work. Also,
The circular hole 9 can also be easily formed. If this part is to be bolted, bolts and brackets are required as additional parts, and drilling and tapping are also required in the engine body 1. In the present invention, the addition of the support bracket 8 and the hole in the engine body 1 are required. It is only a dawning operation, and the cost can be reduced.

As a modification of the support bracket 8, the support bracket 8 shown in FIG.
Are fitted in the circular holes 9 of the engine body 1. In this structure, since the cylindrical portion 8b and the circular hole 9 are tightly fitted, the rigidity is high also in the pipe axial direction, and it is made strong against torsional vibration (horizontal arc vibration mixed with vertical movement). I have. The support bracket 8 shown in FIG. 4 is made of sheet metal, and has a curved portion 8c formed to clamp and fix the cooling pipe 2 at a portion bent into two, and to fix the cooling pipe 2 to the engine body 1. In addition, a groove 9a is provided on a side surface of the outer wall of the engine body 1 so that the curved portion 8c is inserted into the cooling pipe 2 at a substantially horizontal position. The groove 9a is in the engine body 1.
Using the shape described above, a place where insertion and fixation can be made may be the groove 9a, or a groove is formed by forming a groove or welding an auxiliary plate. And a groove 9a that opens in at least two directions.
Is formed. As a result, the curved portion 8c can be inserted from either the x direction or the y direction.
When the cooling pipe 2 is arranged on the back side of the exhaust manifold 7, the cooling pipe 2 can be axially or radially moved and fitted into the groove 9a, thereby facilitating the work.
It improves efficiency. Further, since the cooling pipe 2 is held between the upper and lower positions, the cooling pipe 2 is robust against vertical vibration.

[0016]

As described above, according to the present invention, since both ends of the pipe are screwed to the engine body and the intermediate portion is fixed by the support bracket, the intermediate portion can be used even in a place where a fastening tool does not enter. Since only the protrusion of the support bracket is fitted into the recess or groove of the engine body, the mounting operation can be easily performed. In addition, the number of additional parts and additional work required for existing products is reduced, and the cost is reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a pipe support structure around an engine according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is a perspective view showing a modification of the structure shown in FIG.

FIG. 4 is a perspective view showing a second modification of the structure shown in FIG.

FIG. 5 is a perspective view showing a conventional pipe support structure around an engine.

FIG. 6 is a perspective view when the pipe support structure shown in FIG. 5 is mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine main body 2 Pipe 8 Support bracket 8a, 8b Fitting part 8c Curved part 9 Concave part 9a Groove part

Claims (3)

[Claims] 1. A method in which a pipe is juxtaposed on a side wall of an outer wall of an engine body, an intermediate portion of the pipe is fixed to a recess formed in the side wall of the outer wall by a support bracket, and both ends of the pipe are screwed to the outer wall. Characteristic piping support structure around the engine. 2. The engine periphery according to claim 1, wherein an intermediate portion of the pipe is fixed to a support bracket, and a fitting portion of the support bracket with respect to a concave portion on a side surface of an outer wall has a wide shape in a vertical direction. Piping support structure. 3. A pipe is juxtaposed on the side wall of the outer wall of the engine body, and an intermediate portion of the pipe is clamped from a lateral direction by a support bracket having a substantially U-shaped cross section by a plate member and fixed so as to form a closed space. The curved part of the U-shaped support bracket
A pipe support structure around an engine, wherein the pipe support structure is fitted in a groove formed on a side surface of an outer wall.