JP2002266615A - Oil strainer mounting structure for oil pan and method of manufacturing for oil pan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil strainer mounting structure for an oil pan and a method of manufacturing for the oil pan reducing manufacturing cost of an oil pan assembly by reducing work man-hour of attachment of a strainer and a suction pipe to the oil pan and reducing the number of components following the attachment of the strainer and the suction pipe, preventing a crack in a welding part following the strainer attachment, and capable of facilitating detachment work of a main bearing cap. SOLUTION: In the oil pan, an oil sump part is formed in an interior of a box body, an interior of the oil sump part is vertically partitioned by a plurality of bulkheads, and the strainer filtering foreign matter in lubricant is provided in the oil sump part. It is characterized by that the strainer is horizontally provided by fixing both end parts to the bulkheads, a suction opening of the suction pipe is opened in a suction chamber partitioned by the strainer and the bulkheads on both of its sides, and a lid covering an upper part of the suction chamber is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foreign matter provided at a lubricating oil suction port to an oil pump in an oil pan which is attached to a lower portion of a case such as an engine crankcase and stores lubricating oil passing through the case. The present invention relates to a structure for mounting a strainer for filtration and a method for manufacturing an oil pan having the strainer.

[0002]

2. Description of the Related Art FIGS. 7 and 8 show an example of a prior art oil pan for a diesel engine. FIG. 7 is a schematic perspective view showing the vicinity of a strainer mounting portion of the oil pan, and FIG. 8 is a side view showing the entire configuration of the oil pan. It is a schematic diagram. 7 and 8, reference numeral 100 denotes an oil pan which is formed by welding a flange 4 for attachment to an engine crankcase (not shown), a side plate 2 surrounding the four sides, and a bottom plate 6 in a rectangular box shape. An oil reservoir 10 in which lubricating oil is stored is formed.
Reference numeral 3 denotes a partition that partitions the inside of the oil pan 100 in the longitudinal direction, and extends vertically and is welded at both ends to the inner surface of the side plate 2. Numeral 9 is a communication passage for lubricating oil formed by cutting out lower portions at both ends of the partition wall 3.

[0003] A strainer box 30 is provided in one of the oil reservoirs 10 partitioned by the partition wall 3. The strainer box 30 is provided with a mesh-shaped strainer 1 on the lower surface side of the box body, and the oil reservoir 10 and the inside of the strainer box 30 are communicated through the strainer 1. The strainer box 30 is fixed to bosses 32 welded to four locations on the inner surface of the bottom plate 6 with bolts (not shown). Reference numeral 7 denotes a suction pipe having a flange portion 07 at one end fixed to the strainer box 30 by bolts 31 and penetrating the partition wall 3 and connecting the other end to a suction port of the oil pump 11 as shown in FIG. Have been. The discharge port of the oil pump 11 is connected to a discharge pipe (not shown) to a lubrication section of the engine.

During operation of an engine equipped with such an oil pan, each part of the engine is lubricated and the oil reservoir 10 is lubricated.
The lubricating oil stored in the pump enters the strainer box 30 through the strainer 1 as shown by the arrow in FIG. 8 by the rotation of the oil pump 11 and is sucked into the oil pump 11 through the suction pipe 7. Is done. When the lubricating oil passes through the strainer 1, foreign matter is filtered by the strainer 1 and sent to the oil pump 11.

[0005]

However, in the prior art, the strainer 1 is connected to the oil pan 1
00 is fixed to a strainer box 30 manufactured separately from the oil pan, and this is fixed to bosses 32 welded to four places on the inner surface of the bottom plate 6 of the oil pan with bolts, and the suction pipe 7 is further bolted to the strainer box 30. , The strainer box 30 and the strainer 1 which are separate from the oil pan 100 and the oil pan 100
Mounting the strainer 1 and the suction pipe 7 requires a large number of man-hours, such as mounting the strainer 1 and the suction pipe 7 to the strainer box 30 by bolts, welding the boss 32 for mounting the strainer box 30, and mounting the suction pipe 7 to the strainer box 30 by the bolt 31.

Further, since the strainer box 30 with the strainer 1 is provided separately from the oil pan 100 and the oil pan 100 is attached by bolts, and the suction pipe 7 is attached to the strainer box 30 by bolts 31. In addition, the number of components associated with mounting the suction pipe 7 increases. As described above, the manufacturing cost of the oil pan assembly increases due to an increase in the number of work steps and an increase in the number of parts associated with the installation of the strainer 1 and the suction pipe 7.

In the prior art, cracks are likely to occur in the welded portion of the boss 32 to the inner surface of the bottom plate 6 for mounting the strainer box 30 with the strainer 1 due to engine vibration or the like. Further, when removing the main bearing cap 20 (see FIG. 6) of the engine, the main bearing cap 20 is moved downward to the oil reservoir 10, and then moved to the side to be taken out of the oil pan 100. However, in such a conventional technique, the strainer box 3 with the strainer 1 is provided immediately below the main bearing cap 20.
Since 0 is arranged, this becomes an obstacle, and it is difficult to remove the main bearing cap 20. And the like.

The present invention has been made in view of the problems of the prior art,
The manufacturing cost of the oil pan assembly is reduced by reducing the man-hour for mounting the strainer and the suction pipe to the oil pan, and the number of parts required for mounting the strainer and the suction pipe, and the welding required for mounting the strainer. It is an object of the present invention to provide a strainer mounting structure for an oil pan and a method for manufacturing an oil pan, which can prevent the occurrence of a crack in a portion and further facilitate the work of removing a main bearing cap.

[0009]

According to the present invention, in order to solve the above-mentioned problems, an oil reservoir for storing lubricating oil is formed inside a box body and the oil reservoir is provided inside the box. The oil pan, which is vertically partitioned by a plurality of partitions whose both ends are fixed to the side plate, and in which the oil reservoir is provided with a strainer connected to a suction pipe of an oil pump to filter foreign substances in lubricating oil, The strainer is provided in a substantially horizontal direction with both ends fixed to the partition, and the suction port of the suction pipe is opened in a suction chamber defined by the strainer of the oil reservoir and the partition on both sides thereof. An oil strainer mounting structure for an oil pan, wherein a lid for covering an upper portion of the suction chamber is provided.

According to a second aspect of the present invention, there is provided a specific structure of the oil strainer mounting structure. In the first aspect, a plurality of the strainers and lids are provided in a longitudinal direction of the oil pan, and each strainer and both sides thereof are provided. The suction port of the suction pipe is opened in each of the suction chambers defined by the partition walls.

According to a fourth aspect of the present invention, in any one of the first to third aspects, a support plate having an upwardly directed fastening surface is fixed to a partition facing the suction chamber, and the lid is fastened to the support plate. It is characterized by being detachably attached to a surface.

[0012] The invention according to claims 5 and 6 is the first aspect of the present invention.
The invention according to claim 5 relates to a method for manufacturing an oil pan having an oil strainer mounting structure according to claims 2 and 4, wherein an oil reservoir for storing lubricating oil is formed inside a box body, and the inside of the oil reservoir is Manufacture of an oil pan in which both ends are vertically partitioned by a plurality of partitions fixed to a side plate, and a strainer is provided in the oil reservoir, which is connected to a suction pipe of an oil pump and filters foreign substances in lubricating oil. In the method, the strainer is disposed in a substantially horizontal direction, and both ends thereof are welded and fixed to corresponding portions of the bulkhead to form a suction chamber facing the strainer, and then a support having a clamping surface on the bulkhead facing the suction chamber. The plate is fixedly welded with its fastening surface facing upward, and a lid is detachably attached to the support plate with bolts or the like to cover the suction chamber.

According to a sixth aspect of the present invention, in removing the main bearing cap of the engine provided with the oil pan, the lid is removed from a support plate, and the main bearing cap is lowered downward to the suction chamber. After being moved, it is moved to the side and taken out of the oil pan, and then the lid is fixed to a support plate.

According to this invention, both ends of the strainer arranged in a substantially horizontal direction are fixed to the partition, and the suction port of the oil pump suction pipe is opened by the upper surface of the strainer, the partition on both sides and the lid. Since the suction chamber is partitioned and formed, a strainer can be mounted using the partition wall and the side plate of the oil pan, and the suction chamber of the oil pump suction pipe can be formed.
Production of a strainer box with a strainer separate from the oil pan as in the prior art, mounting of the strainer box to the oil pan by bolts, welding of the boss for mounting the strainer box, mounting of the suction pipe to the strainer box by bolts And other operations are not required at all, and the man-hours required for mounting the strainer and the suction pipe are greatly reduced.

Further, since a strainer is mounted by using a partition wall of an oil pan and the suction chamber is defined by the strainer and partition walls on both sides of the strainer and an upper portion of the suction chamber is covered with a lid, the prior art is used. Parts such as a strainer box with a strainer separate from the oil pan and mounting bolts for this, mounting bolts for the suction pipe to the strainer box, and other parts for mounting the strainer and the suction pipe become unnecessary.
The number of parts is reduced. Due to the reduction in the number of work steps and the number of parts involved in mounting the strainer and the suction pipe as described above, the manufacturing cost of the oil pan assembly is reduced. Further, since the strainer is fixed using the partition wall (and the side plate), the strength of the strainer fixing portion is improved, and the occurrence of cracks in the welded portion due to engine vibration or the like is prevented.

According to the sixth aspect of the present invention, when the main bearing cap is removed from the main bearing side, the suction chamber is opened upward by removing the lid. The main bearing cap can be removed by being moved downward, and there is no obstacle such as a strainer box immediately below the main bearing cap unlike the related art, and the work of removing the main bearing cap is facilitated. Further, according to the second aspect, since the lubricating oil suction pipe is provided at a plurality of suction ports, lubricating oil can be suctioned without any trouble even when the engine is inclined.

According to a third aspect of the present invention, an oil reservoir for storing lubricating oil is formed inside the box, and the inside of the oil reservoir is vertically formed by a plurality of partition walls having both ends fixed to side plates. An oil pan provided with a strainer connected to a suction pipe of an oil pump in the oil sump portion for filtering foreign matter in lubricating oil, wherein the strainer is provided on the partition wall, and the oil sump facing the strainer is provided. The suction port of the suction pipe is opened in the suction chamber defined in the section, and a lid is provided to cover an upper part of the suction chamber.

According to this invention, of the plurality of provided partitions, opposing partitions are also used as strainers.
The structure is simpler and more compact than the above invention,
The number of parts is also reduced.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. However, unless otherwise specified, the dimensions, materials, shapes, and other relative arrangements of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely illustrative examples. Not just.

FIG. 1 is a schematic perspective view showing an oil strainer mounting structure of an oil pan for a diesel engine according to a first embodiment of the present invention, and FIG. 2 is a schematic side view showing the entire configuration of the oil pan. FIG. 3 is a view corresponding to FIG. 1 showing a second embodiment. FIG. 4 is a view corresponding to FIG. 1 showing a third embodiment, and FIG.
It is a figure corresponding to FIG. 2 in an Example. FIG. 6 is a view corresponding to FIG. 2 showing a procedure for removing the main bearing cap in the first embodiment.

In FIGS. 1 and 2 showing the first embodiment, 10
Reference numeral 0 denotes an oil pan, which is formed by welding a flange 4 for attachment to an engine crankcase (not shown), a side plate 2 surrounding the four sides, and a bottom plate 6 in a rectangular box shape, and contains lubricating oil therein. An oil sump 10 is formed. Reference numeral 3 denotes a partition that partitions the inside of the oil pan 100 in the longitudinal direction, and extends vertically and is welded at both ends to the inner surface of the side plate 2.
Reference numeral 9 denotes an oil passage for the lubricating oil formed by cutting the lower portions of both ends of the partition wall 3. The above basic configuration is the same as that of the prior art shown in FIGS. In the present invention, a strainer mounting structure and a method of manufacturing an oil pan having the same are improved.

That is, in FIGS. 1 and 2, reference numeral 1 denotes a mesh-shaped strainer provided between two partition walls 3, which is disposed in a substantially horizontal direction, and whose periphery is welded to the side plates 2 on both sides and the partition walls 3. It is fixed. The strainer 1 may be configured such that both ends are welded to the partition wall 3 and the side plate 2 side is brought into contact with the inner surface of the side plate 2 to such an extent that no gap is formed. Reference numeral 04 denotes a support plate, which has an opening 4a which is hollowed out.
The periphery is welded to the partition wall 3 and the inner surface of the side plate 2. 5
Is an upper cover, which is detachably attached to a tightening surface of the support plate 04 facing upward by a plurality of bolts (5a is a bolt hole).

As a result, the suction chamber 2 is formed by the two surfaces of the two partition walls 3, the lower surface of the upper lid 5, and the upper surface of the strainer 1.
The suction chamber 23 is communicated with the oil reservoir 10 via the strainer 1. Reference numeral 7 denotes a suction pipe, the suction port 8 of which is open to the suction chamber 23, and the other end of which is connected to the suction port of the oil pump 11 through the partition 3 as shown in FIG. The discharge port of the oil pump 11 is connected to a discharge pipe (not shown) to a lubrication section of the engine.

During operation of the engine provided with the oil pan 100 having the strainer mounting structure, the lubricating oil that has lubricated the respective parts of the engine and stored in the oil sump 10 is rotated by the rotation of the oil pump 11 as shown in FIG. As shown by the arrow 2, the oil enters the suction chamber 23 through the strainer 1, passes through the suction pipe 8 through the suction port 8 opened to the suction chamber 23, and is sucked into the oil pump 11. When the lubricating oil passes through the strainer 1, foreign matter is filtered by the strainer 1 and sent to the oil pump 11.

In manufacturing the oil pan 100 having such a configuration, the flange 4, the side plate 2 surrounding the four sides and the bottom plate 6 are welded in a rectangular box shape to form the oil pan 1.
A plurality of partition walls 3 are welded to the inner surface of the side plate 2 to form an oil reservoir 10 in which the inside of the oil pan 100 is partitioned by the partition walls 3 in the longitudinal direction. Next, the strainer 1 is arranged in a substantially horizontal direction, and the periphery thereof is welded to the inner surfaces of the partition walls 3 and the side plates 2 (as described above, the partition walls 3 and 3).
It is also possible to weld only the side). Next, the periphery of the support plate 04 disposed above the strainer 1 is welded to the inner surface of the partition wall 3 and the side plate 2 to form a suction chamber 2 facing the strainer 1.
Form 3 Further, the suction pipe 7 is connected to the partition wall 3.
And the suction port 8 is opened to the suction chamber 23 and welded to the partition wall 3. Further, the upper lid 5 is fastened to the support plate 04 with bolts to cover the suction chamber 23. In this embodiment, the upper lid 5 is connected to the support plate 04.
It can also be configured so as to be welded to the inner surface of the partition wall 3 and the side plate 2 as one piece.

FIG. 6 shows an oil pan 1 having such a configuration.
In the case of an engine provided with the engine 00, the removal procedure for removing the main bearing cap 20 of the main bearing that supports the crankshaft 21 of the engine is shown. In the figure, when the main bearing cap 20 is removed, the bolt for tightening the upper lid 5 covering the suction chamber 23 is loosened, the upper lid 5 is removed from the support plate 04, and the suction chamber 23 is opened upward. The main bearing cap 20 is moved downward into the opened suction chamber 23 to be completely separated from the main bearing side, and then the main bearing cap 20 is moved to the side and taken out of the oil pan 100. . Further, the main bearing cap 2
After the upper cover 5 has been attached to the main bearing,
With bolts.

In the second embodiment shown in FIG. 3, in addition to the first embodiment, a mesh-shaped strainer 1 and a suction chamber 23 provided between two partition walls 3 in the first embodiment.
Is provided also between the partition walls 3 adjacent thereto, and the suction ports 8 and 8a of the suction pipe 7 are configured to open to both the suction chambers 23. Note that the strainer 1 and the suction chamber 23 may be provided at three or more locations. In this case, since the suction ports 8 and 8a of the suction pipe 7 are provided at a plurality of positions, lubricating oil can be suctioned without any trouble even when the engine is inclined. Other configurations are the same as those of the first embodiment, and the same members are denoted by the same reference numerals.

According to the first and second embodiments, both ends of the strainer 1 arranged in a substantially horizontal direction are fixed to the partition wall 3, and the upper surface of the strainer 1, the partition walls 3 on both sides and the upper lid 5 are fixed.
As a result, the suction chamber 23 in which the suction port 8 of the oil pump suction pipe 7 opens is defined, so that the oil pan 10
The strainer 1 is mounted using the partition wall 3 and the side plate 2 of the oil pump 100, and the suction chamber 23 of the oil pump suction pipe 7 can be formed, and a strainer box with a strainer separate from the oil pan 100 as in the related art can be manufactured and manufactured. There is no need to attach the strainer box to the oil pan 100 with bolts, weld the boss 32 for attaching the strainer box 30, or attach the suction pipe 7 to the strainer box 30 with bolts 31. The number of man-hours required for mounting 7 is greatly reduced.

The partition 3 and the side plate 2 of the oil pan 100
The suction chamber 23 of the oil pump suction pipe 7 is defined by the strainer 1 and the partition walls 3 on both sides of the strainer 1 and the upper part of the suction chamber is covered with a lid. Components such as the technology that are necessary for mounting the strainer 1 and the suction pipe 7 such as a strainer box with a strainer separate from the oil pan 100 and mounting bolts for the strainer box, and mounting bolts for mounting the suction pipe 7 to the strainer box 30 are included. It becomes unnecessary and the number of parts is reduced. In addition, since the strainer 1 is fixed by using the partition wall 3 and the side plate 2, the strength of the fixed portion of the strainer 1 is improved, and the occurrence of cracks in the welded portion due to engine vibration or the like is prevented.

Further, according to this embodiment, when the main bearing cap 20 is removed from the main bearing side, the suction chamber 23 is opened upward by removing the upper lid 5, so that the main bearing cap 20 is sucked. The main bearing cap 20 can be easily removed by being moved downward into the chamber 23 and removed therefrom, without any obstacle such as a strainer box directly below the main bearing cap 20 unlike the related art.

In the third embodiment shown in FIGS. 4 and 5, a strainer 1 is fixed to opposing partition walls 3 by welding or the like.
A suction chamber 23 in which the suction port 8 of the suction pipe 7 to the oil pump 11 opens between the two strainers 1;
The periphery of the support plate 04 having the opening 4a whose inside is hollowed out is welded to the inner surface of the partition wall 3 and the side plate 2, and the upper lid 5 is detachably attached to the fastening surface of the support plate 04 with a plurality of bolts. ing. In this case, a plurality of partition walls 3
Since the opposed partition walls are also used as the strainer 1, the structure is simpler and more compact than in the first and second embodiments, and the number of parts is reduced. Other configurations are the same as those of the first embodiment, and the same members are denoted by the same reference numerals.

[0032]

As described above, according to the present invention, the strainer is mounted using the partition wall of the oil pan and the suction chamber of the oil pump suction pipe is formed. Manufacture of the strainer box with the body strainer and installation of the strainer box, welding of the boss for mounting the strainer box, installation of the suction pipe to the strainer box, etc. are completely unnecessary, and the man-hours required for mounting the strainer and the suction pipe are eliminated. Can be greatly reduced.

Further, since the strainer is mounted by using the partition wall of the oil pan and the suction chamber is formed so as to be divided and the upper portion of the suction chamber is covered with the lid, a strainer separate from the oil pan as in the prior art is used. Parts required for mounting the strainer and the suction pipe, such as the box, its mounting bolts, and the suction pipe mounting bolts, become unnecessary, and the number of parts is reduced. Therefore, the manufacturing cost of the oil pan assembly can be reduced by the reduction in the number of work steps and the number of parts associated with the installation of the strainer and the suction pipe as described above.
Further, since the strainer is fixed using the partition wall (and the side plate), the strength of the strainer fixing portion is improved, and the occurrence of cracks in the welded portion due to engine vibration or the like is prevented.

According to the sixth aspect of the present invention, when the main bearing cap is removed from the main bearing side, the suction chamber is opened upward by removing the lid. The main bearing cap can be removed by being moved downward, thereby facilitating the work of removing the main bearing cap. Further, according to the second aspect, since the lubricating oil suction pipe is provided at a plurality of suction ports, lubricating oil can be suctioned without any trouble even when the engine is inclined.

According to the third aspect of the present invention, of the plurality of provided partitions, the opposed partitions are also used as strainers, so that the structure is further simplified and compact, and the number of parts is reduced.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an oil strainer mounting structure of an oil pan for a diesel engine according to a first embodiment of the present invention.

FIG. 2 is a schematic side view showing an overall configuration of an oil pan.

FIG. 3 is a view corresponding to FIG. 1, showing a second embodiment.

FIG. 4 is a view corresponding to FIG. 1, showing a third embodiment.

FIG. 5 is a diagram corresponding to FIG. 2 in a third embodiment.

FIG. 6 is a view corresponding to FIG. 2, showing how to remove the main bearing cap in the first embodiment.

FIG. 7 is a diagram corresponding to FIG. 1 showing a conventional technique.

FIG. 8 is a diagram corresponding to FIG. 2 showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Strainer 2 Side plate 3 Partition wall 4 Flange 04 Support plate 5 Top cover 6 Bottom plate 7 Suction pipe 8, 8a Suction port 10 Oil reservoir 11 Oil pump 20 Main bearing cap 23 Suction chamber 100 Oil pan

Continued on the front page (72) Inventor Takuya Kumagai 3000 Tana, Sagamihara-shi, Kanagawa Prefecture Mitsubishi Heavy Industries, Ltd.General-purpose Machinery & Special Vehicle Business Unit (72) Inventor Akira Numata 3000, Tana, Sagamihara-shi, Kanagawa Prefecture Mitsubishi Heavy Industries 3G015 AA07 BB08 BH02 CA07 DA06 EA05 3G024 AA66 DA18 FA04 FA14 GA32

Claims (6)

[Claims] An oil reservoir for storing lubricating oil is formed inside a box body, and the inside of the oil reservoir is vertically partitioned by a plurality of partition walls having both ends fixed to side plates. An oil pan provided with a strainer connected to a suction pipe of an oil pump for filtering foreign substances in lubricating oil, wherein the strainer is provided in a substantially horizontal direction with both ends fixed to the partition wall, and the oil sump portion An oil strainer for an oil pan, characterized in that a suction chamber defined by the strainer and partition walls on both sides of the strainer is provided with a lid for opening a suction port of the suction pipe and for covering an upper part of the suction chamber. Mounting structure. 2. A plurality of strainers and lids are provided in the longitudinal direction of an oil pan, and suction ports of the suction pipe are opened in suction chambers defined by the respective strainers and partition walls on both sides of the strainers. 2. The method according to claim 1, wherein
The oil strainer mounting structure of the described oil pan. 3. An oil reservoir in which lubricating oil is stored is formed inside the box, and the interior of the oil reservoir is vertically partitioned by a plurality of partition walls having both ends fixed to side plates. An oil pan provided with a strainer connected to a suction pipe of an oil pump for filtering foreign matter in lubricating oil, wherein the strainer is provided on the partition wall, and a suction chamber partitioned and formed in the oil reservoir facing the strainer. And a lid for opening the suction port of the suction pipe and covering an upper part of the suction chamber. 4. A support plate having an upwardly directed clamping surface is fixed to a partition facing the suction chamber, and the lid is detachably attached to the clamping surface of the support plate. 4. An oil strainer mounting structure for an oil pan according to any one of claims 3 to 3. 5. An oil reservoir for storing lubricating oil is formed inside the box, and the inside of the oil reservoir is vertically partitioned by a plurality of partition walls having both ends fixed to side plates. In a method for manufacturing an oil pan, which is connected to a suction pipe of an oil pump and is provided with a strainer for filtering foreign matter in lubricating oil, the strainer is disposed in a substantially horizontal direction, and both ends of the strainer are arranged at corresponding portions of the partition wall. Forming a suction chamber facing the strainer, and then welding and fixing a support plate having a fastening surface to a partition facing the suction chamber with the fastening surface facing upward, and attaching a lid to the support plate with bolts or the like. A method of manufacturing an oil pan, wherein the suction chamber is detachably mounted to cover the suction chamber. 6. When removing the main bearing cap of the engine provided with the oil pan, the lid is removed from the support plate, and the main bearing cap is moved downward to the suction chamber and then laterally. The method according to claim 5, wherein the lid is taken out of the oil pan, and then the lid is fixed to a support plate.