JP2002168121A - Engine hook - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine hook capable of easily joining to a manifold fixing flange and saving assembling man-hour. SOLUTION: This engine hook 1 is constituted by making a joining hole 7 of the engine hook 1 coincide with a fixing hole 9 of the manifold fixing flange 3 and joining a fixing part of the engine hook 1 to the manifold fixing flange 3 by welding. By this constitution, the positioning of the joining hole 7 of the engine hook 1 to the fixing hole of the manifold fixing flange 3 is made unnecessary when a bolt 4 is screwed to a screw hole of a cylinder head 10, the bolt 4 can easily be inserted into the joining hole 7 and the fixing hole, working efficiency is enhanced, and the assembling man-hour can be saved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine hook, and more particularly, to an improvement in an engine hook mounted on a sheet metal manifold mounting flange.

[0002]

2. Description of the Related Art Conventionally, an engine is provided with an engine hook, and when assembling the engine to a vehicle body or removing the engine from the vehicle body, a lifting member is engaged with the engine hook and a crane or the like is engaged. The engine is being lifted. Then, as shown in FIG. 6, based on the position of the center of gravity of the engine (not shown),
1 may be installed on the manifold mounting flange 23 of the exhaust manifold 22.

Generally, as shown in FIG. 6, an engine hook 21 has an engaging hole 26 for engaging the lifting member,
A fastening hole 27 into which a bolt 25 for fixing the engine hook 21 is inserted is formed in a plate-like member. When such an engine hook 21 is mounted on the manifold mounting flange 23, the fastening hole 27 of the engine hook 21 is aligned with the screw hole 28 formed on the manifold mounting flange 23, and inserted into the fastening hole 27. The bolt 25 was screwed into the screw hole 28, and the bolt 25 was tightened.

However, aligning the fastening hole 27 of the engine hook 21 with the screw hole 28 of the manifold mounting flange 23 connected to a cylinder head (not shown) is a complicated and time-consuming and inefficient operation. Was. When tightening the bolt 25,
Since the engine hook 21 also rotates with the rotation of, the operator needs to press the engine hook 21 with the other hand while tightening the bolt 25 with one hand, which is troublesome and inefficient work. .

When an engine (not shown) is lifted using such an engine hook 21, a moment around the bolt 25 is generated in the engine hook 21 and the bolt 25 may be loosened.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above circumstances, and provides an engine hook which can be easily fastened to a manifold mounting flange and prevents loosening of the fastening bolt. The purpose is to.

[0007]

In order to achieve the above object, according to a first aspect of the present invention, a manifold mounting flange of an exhaust manifold is formed of sheet metal, and an engine provided on the manifold mounting flange. In the hook, the engine hook has an engagement hole with which the lifting member is engaged, a fixed portion which is in contact with the manifold mounting flange, and a fastening portion. The fixed portion is joined by welding and the fastening portion is connected to the manifold by bolts. It is characterized in that it is fastened to the cylinder head via a mounting flange.

With this configuration, the fixed portion is joined to the manifold mounting flange by welding, and the fastening portion can be fastened to the cylinder head by the bolt via the manifold mounting flange.

In order to achieve the above object, the invention according to claim 2 of the present invention is characterized in that the fixing portion is joined to an outer peripheral rib erected on a side edge of the manifold mounting flange. I do.

With this configuration, it is possible to prevent the occurrence of thermal distortion due to welding on the sealing surface of the manifold mounting flange, and to ensure the sealing performance of the sealing surface.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An engine hook according to an embodiment of the present invention will be described with reference to FIGS. First, an outline of the engine hook 1 of the present embodiment will be described. The engine hook 1 of the present embodiment is an engine hook 1 in which a manifold mounting flange 3 of an exhaust manifold 2 is formed of sheet metal and is fastened to the manifold mounting flange 3 by bolts 4 as shown in FIG. An engagement hole 5 with which a lifting member (not shown) is engaged;
A fixing portion 6 is provided on the manifold mounting flange 3 and has a fixing portion 6 that comes into contact with the manifold mounting flange 3 and a fastening portion 8 having a fastening hole 7 through which the bolt 4 (see FIG. 4) is inserted. The fixing portion 6 was made to correspond to the mounting hole 9 and joined to the rib 13 erected on the side edge of the manifold mounting flange 3 by welding.

As a result, a bolt 4 (FIG. 4) for fastening the engine hook 1 to the manifold mounting flange 3
When the bolt is inserted into the fastening hole 7 formed in the engine hook 1 and the mounting hole 9 of the manifold mounting flange 3, it is not necessary to align the fastening hole 7 with the mounting hole 9. 4 can be easily screwed into a screw hole 11 formed in the cylinder head 10.

Further, the engine hook 1 is fixed to the joint 12 by welding (see FIGS. 1, 2 and 4) and the bolt 4 fastened to the cylinder head 10 so that the engine (not shown) is mounted. When the engine hook 1 is lifted, a moment around the bolt 4 (M in FIG. 3) is suppressed from being generated in the engine hook 1 to prevent the bolt 4 from being loosened. Further, since the fixing portion 6 of the engine hook 1 is welded to and joined to the rib 13 of the manifold mounting flange 3, thermal distortion due to welding does not occur on the sealing surface 3 a of the manifold mounting flange 3, and the sealing surface is not affected. It is configured not to impair the sealing performance of 3a.

Next, details of the engine hook 1 of the present embodiment will be described. As shown in FIGS. 1 to 3, the engine hook 1 of the present embodiment has an engagement hole 5 for engaging a lifting member (not shown) and a fastening hole 7 for inserting the bolt 4.
The engine hook 1 is provided with a fixing portion 6 and a fastening portion 8 by forming a cross section of the plate-shaped member having the formed portions into a required shape, and a fastening hole 7 located in the fastening portion 8 is provided with a manifold mounting flange. 3, and the fixing portion 6 is welded to the manifold mounting flange 3 of the exhaust manifold 2 by welding. More specifically, the fastening portion 8 is formed so as to extend from a substantially central portion of the manifold mounting flange 3 to a position near the lower end below the manifold mounting flange 3 so as to abut the manifold mounting flange 3. It is formed continuously with the fixing portion 6 via a first bent portion extending to the height of the rib 13 of the manifold mounting flange 3 in a direction away from the flange surface 3b of the flange 3. The fixing portion 6 is connected to the manifold mounting flange 3.
Is formed so as to extend along the upper side, and a portion where the manifold mounting flange 3 is fixed to the rib 13 is provided above. The fixing portion 6 extends in a direction away from the flange surface 3 b of the manifold mounting flange 3.
It is formed continuously with the engaging portion where the engaging hole 5 is formed via a second bent portion larger than the bent portion. The fastening portion 8, the fixing portion 6, and the engaging portion are formed substantially parallel to the flange surface 3b.

The manifold mounting flange 3 is formed by press molding, and as shown in FIGS. 1 and 3, a sealing surface 3a pressed against the cylinder head 10 via a gasket 14 (see FIG. 4). A rib 13 for reinforcement is provided upright on the side edge of. The manifold mounting flange 3 has a plurality of (three in this embodiment) exhaust pipes 15.
The seal surface 3a is provided with a communication hole (not shown) for communicating each exhaust pipe 15 with an exhaust port (not shown) of the corresponding cylinder head 10.

In the engine hook 1, the fastening portion 8 is brought into contact with the flange surface 3b of the manifold mounting flange 3 so that the fastening hole 7 coincides with the mounting hole 9 formed in the manifold mounting flange 3. The fixing portion 6 is configured to abut on the end 13a of the rib 13 on the upper side of the manifold mounting flange 3.
The structure is such that the fixing portion 6 and the rib 13 are joined by fillet welding the contacted portions of the three members 1 and 3. Then, as shown in FIG. 4, the fastening portion 8 of the engine hook 1 and the manifold mounting flange 3 are fastened to the cylinder head 10 with the bolts 4, so that the engine hook 1 uses the joint portion 12 and the bolts 4 together. The structure is fixed to the manifold mounting flange 3. Further, the engine hook 1 is attached to a bias side of the exhaust manifold 2.

The operation of the engine hook 1 of this embodiment in such a configuration will be described. In the engine hook 1 of the present embodiment, the bolts 4 are connected to the fastening holes 7 by matching the fastening holes 7 with the mounting holes 9 of the manifold mounting flange 3 and joining the fixing portions 6 to the manifold mounting flange 3 by welding. When the engine hook 21 is attached with the bolt 25 as in the case of the conventional engine hook 21 (see FIG. 6), the fastening hole 27 of the engine hook 21 can be easily inserted into the attachment hole 9. There is no need to align the screw holes with the 23 screw holes 28, so that work efficiency is improved and the number of assembly steps can be reduced.

Further, the engine hook 1 of the present embodiment
When the engine (not shown) is lifted by attaching it to the manifold mounting flange 3 by using welding and fastening with the bolt 4 in combination, the moment around the bolt 4 (see FIG. 3) can be suppressed, and the moment acts to loosen the bolt 4, thereby lowering the sealing performance of the sealing surface 3 a of the manifold mounting flange 3 and exhausting the gasket 14. A situation in which gas leaks can be prevented.

Further, the engine hook 1 of the present embodiment
The fixing part 6 is a rib 1 of the manifold mounting flange 3.
By welding to the end 13a of the third member 3, it is possible to suppress the occurrence of thermal distortion due to welding on the sealing surface 3a of the manifold mounting flange 3, and to ensure the sealing performance of the sealing surface 3a.

Therefore, in the engine hook 1 of the present embodiment, the manifold mounting flange 3 of the exhaust manifold 2 is formed by sheet metal, and the engine mounting hook 1 is fastened to the manifold mounting flange 3 by the bolts 4. Manifold mounting flange 3
And the fixing portion 6 is welded to the manifold mounting flange 3 so that the bolt 4 can be easily inserted into the fastening hole 7 and the mounting hole 9. As shown in FIG. 21 (see FIG. 6), when attaching the engine hook 21 with the bolt 25, it is not necessary to align the fastening hole 27 of the engine hook 21 with the screw hole 28 of the manifold mounting flange 23, and the working efficiency is improved. As a result, the number of assembly steps can be reduced. In addition, since the engine hook 1 is attached to the manifold mounting flange 3 by using welding and fastening with the bolts 4 in combination, the number of welding locations is reduced, and thermal distortion due to welding of the manifold mounting flange 3 is reduced as much as possible. This can reduce the influence of the sealing surface 3a on the sealing performance and reduce the engine (not shown) as compared with the case where the bolt is attached only with the bolt 4 (see FIG. 5).
Can be prevented from generating a moment around the bolt 4 on the engine hook 1 when the
It is possible to prevent a situation in which the bolt 4 is loosened by the action of the moment, the sealing performance of the sealing surface 3 a of the manifold mounting flange 3 is reduced, and the exhaust gas leaks from the gasket 14. Further, the engine hook 1 is provided with a manifold mounting flange 3.
By being formed separately from the material, the material, surface treatment, and the like can be changed as necessary in accordance with the required strength.

Further, since the fixing portion 6 is welded to the end portion 13a of the rib 13 of the manifold mounting flange 3, the occurrence of thermal distortion due to welding on the sealing surface 3a of the manifold mounting flange 3 is suppressed. Seal surface 3
a sealing performance can be ensured.

[0022]

According to the first aspect of the present invention, the manifold mounting flange of the exhaust manifold is formed of sheet metal, and the fastening hole is formed in the engine hook which is fastened to the manifold mounting flange by bolts. The bolts can be easily inserted into the fastening holes and the mounting holes because they are aligned with the mounting holes in the mounting flanges and the fixed parts are joined to the manifold mounting flanges by welding. When the hook is mounted with the bolt, the fastening hole does not need to be aligned with the screw hole of the manifold mounting flange, so that the working efficiency is improved and the number of assembling steps can be reduced. Also, since the engine hook is attached to the manifold mounting flange using both welding and bolt fastening, the number of welding points is reduced, and thermal distortion due to welding of the manifold mounting flange is prevented as much as possible. In addition to reducing the effect on the sealing performance of the engine, it is possible to suppress the generation of a moment around the bolt on the engine hook when the engine is lifted, as compared with the case where only the bolt is used. In addition, it is possible to prevent a situation in which the bolt is loosened by the action of the moment, the sealing performance of the sealing surface of the manifold mounting flange is reduced, and the exhaust gas leaks from the gasket. further,
The engine hook is formed separately from the manifold mounting flange, so as to correspond to the required strength,
The material, surface treatment, etc. can be changed as required.

According to the second aspect of the present invention, the fixing portion of the engine hook is joined to the end of the rib of the manifold mounting flange by welding.
The occurrence of thermal distortion due to welding on the sealing surface of the manifold mounting flange can be suppressed, and the sealing performance of the sealing surface can be ensured.

[Brief description of the drawings]

FIG. 1 is a side view of an engine hook of the present embodiment.

FIG. 2 is a plan view of the engine hook of the embodiment.

FIG. 3 is a front view of the engine hook of the embodiment.

FIG. 4 is an explanatory view of the engine hook according to the embodiment, particularly showing a state where the engine hook is fastened to the cylinder head via a manifold mounting flange by a bolt.

FIG. 5 is a view showing a state in which the engine hook is fastened to the cylinder head only by bolts via a manifold mounting flange.

FIG. 6 is a perspective view showing a conventional engine hook mounting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine hook 2 Exhaust manifold 3 Manifold mounting flange 4 Bolt 5 Engagement hole 6 Fixing part 7 Fastening hole 8 Fastening part 10 Cylinder head 13 Rib

Claims (2)

[Claims] 1. A manifold mounting flange of an exhaust manifold is formed of sheet metal, and in an engine hook provided on the manifold mounting flange, the engine hook abuts an engagement hole with which a lifting member engages and the manifold mounting flange. An engine hook, comprising: a fixed portion and a fastening portion, wherein the fixed portion is joined by welding, and the fastening portion is fastened to a cylinder head by a bolt via the manifold mounting flange. 2. The engine hook according to claim 1, wherein the fixing portion is joined to an outer peripheral rib erected on a side edge of the manifold mounting flange.