JP2014152731A - Oil pan having vibration control function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil pan having vibration control function capable of suppressing influence due to vibrations transmitted from an internal combustion engine by adding a physical stress to a partition plate in relation to the partition plate of the oil pan.SOLUTION: An oil pan having vibration control function comprises: a container main body which is arranged along a crank shaft direction on a lower part of a cylinder block of an engine and has lubricant stored therein; and partition plates which partition the interior of lubricant storage space of the container main body at every proper interval. Therein, the vibration control function is imparted to the partition plate. The container main body is a rectangular parallelepiped shape container, and the partition plates include a fixation part which are arranged in the width direction of the container main body and are integrally fixed to a container main body inner wall and a tension addition part which adds a tensile force or a compression force at least along the width length of the container main body. A pair of screw shafts and a nut part which adjusts and connects the screw shafts with each other can be cited as the tension addition part.

Description

  The present invention relates to an oil pan having a vibration damping function, and more particularly to an oil pan having a vibration damping function capable of suppressing the influence of vibration transmitted from an internal combustion engine by applying physical stress to a partition plate. Is.

In a gas engine or diesel engine for power generation, an oil pan is installed below the cylinder block to store lubricating oil for lubricating the engine body (not shown), and the rigidity of the oil pan is inside the oil pan. A plurality of partition plates are installed in the short direction of the oil pan in order to improve the stability of the oil pan and prevent the oil from flowing in the oil pan to stably store the oil.
However, when the frequency of the vibration force of the engine is close to the natural frequency of the entire oil pan, such a partition plate may resonate and generate a large vibration, resulting in damage. In addition, measures such as changing the natural frequency of the oil pan have been proposed.

  However, the vibration force frequency is finely distributed, and measures such as increasing the plate thickness and improving the shape, and applying measures such as attaching a damping material to the outer surface of the oil pan, eliminate the increase in mass and cost. Counter-events are a problem.

  In addition, it is conceivable to replace the oil pan itself with a vibration countermeasure product or take a reinforcement measure as a countermeasure after the start of operation. However, it is difficult to carry out a countermeasure work with a stationary generator engine. Yes, it becomes a big cost and high cost.

  On the other hand, the following prior art can be mentioned as a measure for improving the strength of the oil pan of the engine. In Patent Document 1 (Japanese Utility Model Publication No. 62-171651), as shown in FIGS. 10 (A) and 10 (B), a stepped portion 112 deformed horizontally in an oil reservoir 110 of an oil pan 109, And the structure which provides the reinforcement rib 114 in the orthogonal | vertical direction and improves the rigidity by improving the rigidity of the oil pan 109 is disclosed.

Further, in Patent Document 2 (Japanese Patent Laid-Open No. 7-24378), as shown in FIG. 11, a technique in which an oil pan 122, which is an object to be insulated, is attached to a vibrating body 121 via an anti-vibration rubber 124. It is shown.
A gasket or packing 126 is interposed between the attachment surfaces of the vibrating body 121 and the oil pan 122, and a vibration-proof rubber 124 with a distance 133 attached thereto is inserted into the attachment hole 130. Thus, a support structure in which vibration is difficult to be transmitted to the oil pan 122 is shown.

Japanese Utility Model Publication No. 62-171651 Japanese Patent Laid-Open No. 7-24378

  However, since Patent Document 1 improves the shape of the oil pan container itself so that the rigidity is improved, if a problem occurs after construction, it is necessary to replace the entire oil pan and easily take measures. It is difficult to carry out the construction, which increases the cost and costs.

Similarly, the technique of Patent Document 2 has a support structure in which the oil pan 122 is attached via a vibration-proof rubber 124 so that vibration is not easily transmitted to the oil pan. If there is a problem with the vibration control effect after the construction of a large engine, it is necessary to separate the cylinder block from the oil pan once and install or replace the anti-vibration rubber. It is difficult to carry out the construction, which increases the cost and costs.
And, like the oil pan in which a plurality of partition plates are installed in the short direction, the problem of resonating with the vibration force of the engine and causing a crack at the welded joint between the partition plate and the oil pan The techniques of improving the rigidity of the oil pan itself and the anti-vibration rubber disclosed in Patent Documents 1 and 2 do not provide a sufficient effect for suppressing the vibration of the partition plate 3.
The present invention has been proposed to solve the above-described problems. By applying physical stress to the partition plate, the resonance frequency is set so as not to resonate with the vibration force of the engine. An object of the present invention is to provide an oil pan having a vibration damping function that can suppress the influence of vibration transmitted from an internal combustion engine.

  In order to solve the above-mentioned problem, in the present invention according to claim 1, a container body disposed along the crankshaft direction at a lower part of a cylinder block of an engine and storing lubricating oil, and lubricating oil storage of the container body. In an oil pan having a vibration damping function, the container body is a rectangular parallelepiped container, and the partition plate is a container having a vibration damping function. In the lubricating oil storage space of the main body, it is arranged in the short direction of the container main body and fixed to be integrally fixed to the inner wall of the container main body, and tension is applied to apply tensile force or compressive force along at least one direction And a section.

  The partition plate is applied with a tensile force or a compressive force along at least one direction by the tension applying portion, so that the resonance frequency of the partition plate fluctuates and resonance due to the engine's vibration force is avoided. It becomes possible to suppress the influence of vibration transmitted from the internal combustion engine.

  According to the second aspect of the present invention, one direction is the short direction of the container body, and the short side of the container body in a direction perpendicular to the axis on a plane including an axis parallel to the crankshaft direction of the engine. It is a direction.

  Thereby, a tensile force or a compressive force is applied to the partition plate along the short direction of the container body by the tension applying portion.

  According to a third aspect of the present invention, the tension applying portion is disposed between the opposing fixed portions of the partition plate and the inner wall of the container body, and the pair of screws each having a proximal end fixed to the fixed portion. It is characterized by comprising a shaft and a nut portion that is screwed to the tip of a pair of screw shafts and adjustably connects the screw shafts.

  Thereby, between the fixing parts which a partition plate and a container main body inner wall mutually oppose, it can loosen or tighten by turning the nut part which connects a pair of screw shaft to an arbitrary direction suitably. As a result, a tensile force or a compressive force is freely applied to the partition plate, the resonance frequency fluctuates, resonance due to the engine vibration force is avoided, and the entire oil pan is affected by vibrations transmitted from the internal combustion engine. It becomes possible to suppress.

  According to a fourth aspect of the present invention, the tension applying portion is a turnbuckle that adjustably connects a dividing interval of the two divided partition plates.

  Thereby, the partition plate divided into two can be connected by a turnbuckle. Although the vibration due to the engine's vibration force is transmitted to each of the two divided plates, they do not resonate together due to the vibration force of the engine, and the influence of vibration transmitted from the internal combustion engine is suppressed. Is possible.

  In the present invention according to claim 5, the tension applying portion is a weld bead in which a plurality of lines are added to the partition plate.

  The partition plate is freely applied with a tensile force due to thermal strain accompanying welding. As a result, the resonance frequency of the partition plate fluctuates, resonance due to the vibration force of the engine is avoided, and the influence of vibration from the engine can be suppressed. In addition, after the actual installation, a welding bead is appropriately added in accordance with the state of the oil pan received from the engine, thereby adjusting the tensile force and reducing the influence caused by the vibration caused to the oil pan.

  Furthermore, in this invention of Claim 6, a tension | tensile_strength addition part is comprised by the heat provision part wound by the partition plate.

  As a result, when the heat applying unit wound around the partition plate is energized, the heat generated by the heat applying unit causes the partition plate to be heated and thermally expanded, the inner wall of the container body is pressed, and the entire oil pan is subjected to stress. Since it is in the added state, it is possible to suppress the influence of vibration transmitted from the internal combustion engine.

  According to the present invention, the partition plate is physically loaded by the tension applying portion, and the resonance frequency varies accordingly. Therefore, resonance due to the vibration force of the engine is avoided, and the influence of vibration transmitted from the engine can be suppressed on the entire oil pan. Further, even after the engine is installed, that is, after the engine is started, it is possible to take a vibration suppression measure by adjusting the compression force applied by the tension applying unit while checking the vibration state of the partition plate each time.

It is a schematic perspective view which shows an example of the oil pan which has a damping function concerning this invention. (A) The schematic diagram which shows 1st Embodiment of the oil pan which has a damping function concerning this invention, (b) It is a cross-sectional view which follows the II-II direction of Fig.2 (a). It is a schematic diagram which shows 2nd Embodiment of the oil pan which has a vibration suppression function concerning this invention. It is a schematic diagram which shows 3rd Embodiment of the oil pan which has a vibration suppression function concerning this invention. It is a schematic diagram which shows 4th Embodiment of the oil pan which has a vibration suppression function concerning this invention. 6 is a graph showing an example of the relationship between the tension on the partition plate and the natural frequency in the case of basic vibration and secondary vibration in an oil pan having a vibration damping function according to the present invention. 6 is a graph showing an example of the relationship between the tension with respect to the partition plate and the rate of change of the natural frequency in the case of the fundamental vibration and the secondary vibration in the oil pan having the damping function according to the present invention. It is the table | surface which showed an example of the relationship between a natural frequency and a damping ratio. 9 is a graph showing an example of a response magnification of a one-degree-of-freedom system with a damping ratio as a parameter at the natural frequency in FIG. (A), (B) Explanatory drawing which shows the structure which provides the step part which deform | transformed in the horizontal direction in the oil reservoir part of the oil pan, and the reinforcement rib in the perpendicular direction, and improves the rigidity by improving the rigidity of the oil pan. It is. It is explanatory drawing which shows the technique which attached the oil pan of the to-be-insulated object via the vibration isolator with respect to the vibrating body in the prior art.

  Hereinafter, various embodiments of an oil pan having a vibration damping function according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows the overall configuration of an engine oil pan 1 to which the present invention is applied. Although not shown, the engine is a generator gas engine or diesel engine, and a stationary engine is taken as an example.
The oil pan 1 is attached to the lower part of the cylinder block of the engine, and a container body 2 that stores lubricating oil that has been lubricated and flowed down inside the cylinder block, and a plurality of oil reservoirs (lubricating oils) inside the container body 2. A partition plate 3 is provided to partition the storage section) 4.
The container body 2 is a container that is formed of a steel material and has a rectangular parallelepiped shape along the longitudinal direction of the engine that is the crankshaft direction of the engine.
The partition plates 3 are disposed at appropriate intervals in the lateral direction of the container body 2. In this case, the partition plate 3 is formed of a thin steel plate, both ends are welded to both side walls of the container body 2, and further welded to the bottom plate 5 of the container body 2, and attached to the bottom plate 5 in a substantially vertical direction. Yes.

  In addition, a communication opening 6 is formed in the bottom plate 5 of the container body 2 at the center in the length direction of the partition plate 3. Further, an oil drain hole 7 for discharging the lubricating oil stored in the container body 2 is formed in the central portion of the bottom plate 5 of the container body 2.

  The oil pan 1 as described above has a tension applying portion 10 that applies a tensile force or a compressive force along one direction of the partition plate 3 as a main part of the present invention, as will be described later with reference to FIGS. Is provided.

(First embodiment)
Fig.2 (a) and FIG.2 (b) have shown the oil pan 1 concerning 1st Embodiment.
The tension applying portion 10 in the oil pan 1 according to the first embodiment is welded at the base end side to fixed portions by welding of the partition plate 3 and both side walls of the container body 2 to each other, that is, the joint portions 3E and 3E. And a pair of screw shafts 11, 11 whose tip sides are threaded, and a nut portion 12 that is screwed to the tip ends of the screw shafts 11, 11 and adjustably connects the screw shafts 11, 11 to each other. One end of the pair of screw shafts 11, 11 is threaded in a right-handed manner and the other is reversely threaded. The nut portion 12 corresponds to the screw on the distal end side of the screw shafts 11, 11. The internal thread is threaded.

  As described above, the oil pan 1 receives the lubricating oil that has flowed down by lubricating the inside of the cylinder block to the lower portion of the cylinder block of the engine body on the support housing B on which the engine body is placed and supported and fixed. Are arranged along the crankshaft direction of the engine, that is, along the direction perpendicular to the paper surface.

In the first embodiment as described above, tension is applied to the partition plate 3 along the short direction of the container body 2 on which the partition plate 3 is provided by the tension applying unit 10.
In this case, a nut is attached to the screwed distal end side of the pair of screw shafts 11 and 11 whose base end sides are welded to the joint portions 3E and 3E facing each other between the partition plate 3 and both side walls of the container body 2 respectively. By rotating the portion 12 in one direction or in the reverse direction, the screw shafts 11 and 11 can be brought closer to or away from each other. As a result, a tensile force or a compressive force is exerted on the both side walls of the container body 2 via the joint portions 3E and 3E of the partition plate 3 which are welded portions to the both side walls of the container body 2, and the partition plate 3 is also affected. Tension is applied along the short direction of the container body 2.
Then, the partition plate 3 is repelled by this tensile force or compressive force, and is placed in a state where the tensile force or compressive force and further stress from both side walls of the container body 2 are applied. Placed under 3 constraints.
For this reason, the natural value of the resonance mode of each partition plate 3, that is, the resonance peak frequency fluctuates, and the resonance due to the vibration force of the engine is avoided, and the oil pan 1 as a whole suppresses the influence of vibration from the engine. It becomes possible.
After installing the oil pan 1 as described above, the natural frequency is measured when the engine is operating, and if necessary, the nut portion 12 for adjusting and connecting the screw shafts 11 and 11 is rotated each time. The natural frequency can be adjusted by adjusting.

(Second Embodiment)
FIG. 3 shows an oil pan 1 according to the second embodiment.
In the oil pan 1 in this case, the tension applying unit 10 includes a turnbuckle 13 (shaft adjusting connecting member) that connects the dividing distances of the two divided plates 3a and 3b in an adjustable manner.
The partition plates 3 a and 3 b are arranged in a straight line along the short direction of the container main body 2 at each appropriate position of the container main body 2. The partition plates 3a and 3b are joined to the corresponding side wall of the container body 2 by welding. When the partition plates 3 a and 3 b are welded in a straight line along the short direction of the container body 2, a gap G is generated along the longitudinal center axis of the oil pan 1.
Three turnbuckles 13 are provided along the short direction of the container body 2 so as to straddle the gap G between the partition plates 3a and 3b.
Although not shown in detail, the turnbuckle 13 here includes, for example, a shaft portion 13a threaded on both ends, and nut portions 13b and 13b that are threadably screwed on both ends of the shaft portion 13a. Yes. At the tip of the nut portion 13b, a fixing hole 14 is provided for fixing the nut portion 13b by inserting a fixing pin (not shown) implanted in the partition plates 3a and 3b.
That is, the turnbuckle 13 is configured to adjust the overall length by screwing the nut portions 13b and 13b to the shaft portion 13a so as to advance and retract.

In the second embodiment as described above, the two divided plates 3a and 3b are aligned along the short direction of the container main body 2 at respective positions arranged at appropriate intervals of the container main body 2. The partition plates 3a and 3b are joined to the corresponding side walls of the container body 2 by welding.
Thus, a gap G is generated in the partition plates 3a and 3b along the central axis in the longitudinal direction of the oil pan 1.

Then, the turnbuckle 13 is fastened in three or three steps so as to straddle the gap G between the partition plates 3a and 3b along the short direction of the container body 2. Thereby, the two divided partition plates 3 a and 3 b can be connected by the turnbuckle 13.
When the turnbuckle 13 is fastened so as to straddle the gap G between the partition plates 3a and 3b, the nut portions 13b and 13b are screwed into the shaft portion 13a, and the nut portions 13b and 13b are appropriately advanced and retracted to adjust the overall length. be able to.

Next, the fixing hole 14 of the nut portion 13b is inserted into the fixing pin implanted in the partition plates 3a and 3b, and is fixed so that the nut portion 13b does not fall off.
Thereby, the partition plates 3a and 3b can be connected by the turnbuckle 13.
At this time, if the nut portions 13b and 13b are appropriately advanced and retracted to adjust the overall length of the turnbuckle 13 to be longer, the partition plates 3a and 3b are moved outward with the corresponding side walls of the container body 2 through the turnbuckle 13. Can be pressed.
On the other hand, when the overall length of the turnbuckle 13 is adjusted to be shorter, the corresponding side walls of the container body 2 can be pulled inward of the container body 2 through the turnbuckle 13.

As described above, the partition plates 3a and 3b are constrained by the turnbuckle 13, whereby the entire oil pan 1 can be stressed through the partition plates 3a and 3b.
The partition plates 3a and 3b transmit vibrations caused by the engine's vibration force, but they do not resonate together due to the engine's vibration force, and the influence of vibration from the engine can be suppressed. It becomes.
And after installing the oil pan 1 as described above, the natural frequency is measured when the engine is operated, and if necessary, the nut portions 13b and 13b of the turnbuckle 13 are rotated each time, The natural frequency can be adjusted by advancing and retreating to further adjust the overall length of the turnbuckle 13.

(Third embodiment)
FIG. 4 shows an oil pan 1 according to the third embodiment.
In the oil pan 1 in this case, the tension applying portion 10 is a weld bead 15 in which a plurality of lines are added to the partition plate 3. Here, the weld beads 15 are formed in parallel with each other in the vertical direction in the drawing by a welding device (not shown).
That is, here, the weld bead 15 is a streak-like raised portion formed on the surface of the partition plate 3 by welding. In FIG. 4, the oil pan 1 is formed in a pair and four locations across the longitudinal center axis.

In the third embodiment as described above, when a plurality of streaky raised portions that are weld beads 15 are formed on the partition plate 3 formed of a thin steel plate having a uniform thickness, the welding bead 15 is welded. The tensile force can be applied to the partition plate 3 in the direction orthogonal to the direction in which the weld beads 15 are formed by heat shrinkage. Thereby, the eigenvalue of the resonance mode of the partition plate 3 in the state of the thin steel plate having a uniform thickness, that is, the resonance peak frequency can be moved.
Then, the natural value of the resonance mode of each partition plate 3, that is, the resonance peak frequency fluctuates, so that resonance due to the vibration force of the engine is avoided, and the oil pan 1 as a whole suppresses the influence of vibration from the engine. Is possible.
After installing the oil pan 1 as described above, the natural frequency is measured when the engine is running, and if necessary, welding is performed to add the weld bead 15 and the natural frequency is adjusted. Can do.

(Fourth embodiment)
FIG. 5 shows an oil pan 1 according to the fourth embodiment.
In the oil pan 1 here, the tension applying unit 10 includes a heating wire 16 as a heat applying unit wound around the partition plate 3. The heating wire 16 is covered with a heat conductive insulating coating film, and is wound around the entire partition plate 3 at a constant density. The entire partition plate 3 is heated by energization from the power supply unit 17.

In the fourth embodiment as described above, when the heating wire 16 wound around the partition plate 3 is energized from the power supply unit 17, the heating wire 16 wound at a constant density on the entire partition plate 3 generates heat. The entire partition plate 3 is heated.
Thereby, the partition plate 3 is thermally expanded, and a compressive force is exerted on both side walls of the container body 2, and a tension is applied to the partition plate 3 along the short direction of the container body 2.
Then, the partition plate 3 is repelled by this tension, and is placed in a state where the compression force and further stress from both side walls of the container body 2 are applied, and the entire oil pan 1 is placed under the restraint of the partition plate 3. .
For this reason, the natural value of the resonance mode of each partition plate 3, that is, the resonance peak frequency fluctuates, and the resonance due to the vibration force of the engine is avoided, and the oil pan 1 as a whole suppresses the influence of vibration from the engine. It becomes possible.
In addition, if the relationship between the electric power given to the heating wire 16 and the natural vibration value is acquired before the oil pan 1 is installed, even after the oil pan 1 is installed, the natural frequency is measured during engine operation, If necessary, the natural frequency can be adjusted by changing the power applied to the heating wire 16.

The oil pan 1 having the vibration damping function according to the present invention has been described with reference to the first to fourth embodiments.
In any case, in the present invention, the partition plate 3 is physically loaded by the tension applying unit 10, and the partition plate 3 is repelled by a tensile force or a compressive force, thereby changing the resonance frequency. . Therefore, resonance due to the vibration force of the engine is avoided, and the influence of vibration transmitted from the engine can be suppressed. Further, even after the engine is installed, that is, after the engine is started, it is possible to take a vibration suppression measure by adjusting the tension applied by the tension applying unit 10 while checking the vibration state of the partition plate 3 each time.

  In the first to fourth embodiments, an example in which a tensile force or a compressive force is applied to the partition plate 3 along the short direction of the container body 2 by the tension applying unit 10 is shown. It is also possible to apply a tensile force or a compressive force to the plate 3 in a direction orthogonal to the short direction of the container body 2. In short, the partition plate 3 may be physically loaded regardless of the addition direction.

Here, for reference, in FIGS. 6 and 7, the tension (kg) applied by the tension applying unit 10, the natural frequency (Hz) of the oil pan 1, the tension (kg), and the natural vibration of the oil pan 1 are shown. The relationship with the number change rate (%) is shown.
FIG. 6 shows how the natural frequency changes when the tension (kg) is 0 to 1000 kg.
Further, as support conditions for the partition plate 3, when a fundamental vibration (primary mode) is given by support-support, when a secondary vibration (secondary mode) is given by support-support, a basic vibration (support-fixed) When the primary vibration is applied, the secondary vibration (secondary mode) is applied in the support-fixed state, and the basic vibration (primary mode) is applied in the fixed-fixed state. When the secondary mode) is given, the respective natural frequency changes are shown.

FIG. 7 shows how the rate of change (%) of the natural frequency of the oil pan 1 changes when the tension (kg) is 0 to 1000 kg.
In this case, when the fundamental vibration (primary mode) was given by support-support, when the secondary vibration (secondary mode) was given by support-support, the fundamental vibration (primary mode) was given by support-fixation. When the secondary vibration (secondary mode) was applied with support-fixed, the secondary vibration (secondary mode) was applied with fixed-fixed when the fundamental vibration (primary mode) was applied with fixed-fixed The rate of change of each natural frequency is shown.

  From the above graph, it can be seen that a load of approximately 100 kgf in the primary mode and approximately 300 kgf in the secondary mode may be sufficient to shift the eigenvalue by 5% as the support condition.

When the natural value of the natural frequency is shifted by 5%, the separation from the resonance region will be described with reference to the following graph. Here, the response magnification of the one-degree-of-freedom system using the damping ratio as a parameter will be described.
FIG. 8 shows the relationship between the natural frequency of 50 Hz and the damping ratio ζ, and FIG. 9 shows the relationship between the frequency and the response magnification.
As can be seen from FIG. 9, the response magnification shows a steep change around the frequency of 50 Hz. It can be seen that ± 5% of the frequency 50 Hz has a sufficiently reduced response magnification at 47.5 Hz and 52.5 Hz, and is out of the resonance region immediately around the frequency 50 Hz.

  It is possible to effectively suppress vibration of the partition plate that is immersed in the liquid storage part of the engine, and furthermore, it is possible to take a vibration suppression measure after the engine liquid storage part is installed, that is, even after the engine is started. Therefore, it is useful as an application technique to a large oil pan of a stationary engine for power generation.

DESCRIPTION OF SYMBOLS 1 Oil pan 2 Container body 3 Partition plate 3a, 3b Partition plate 3E Joint part 4 Oil storage part (lubricant oil storage part)
5 Bottom plate 6 Communication opening 7 Oil drain hole 10 Tension applying part 11 Screw shaft 12 Nut part 13 Turn buckle 13a Shaft part 13b Nut part 14 Fixing hole 15 Welding bead 16 Heating wire 17 Power supply part

Claims (6)

A container body disposed along the crankshaft direction at a lower portion of the cylinder block of the engine and storing lubricating oil; and a partition plate for partitioning the lubricating oil storage space of the container body at appropriate intervals; In an oil pan having a vibration damping function, which has a vibration damping function for the partition plate,
The container body is a rectangular parallelepiped container,
The partition plate is disposed in a short direction of the container body in the lubricating oil storage space of the container body, and a fixing portion that is integrally fixed to the inner wall of the container body;
An oil pan having a vibration damping function, comprising: a tension applying portion that applies a tensile force or a compressive force along at least one direction.   The one direction is a short direction of the container body, and is a short direction of the container body in a direction perpendicular to the axis on a plane including an axis parallel to the crankshaft direction of the engine. The oil pan having a vibration damping function according to claim 1. The tension applying portion is disposed between fixed portions of the partition plate and the inner wall of the container body facing each other, and a pair of screw shafts each having a proximal end fixed to the fixed portion,
A nut portion screwed to the tip of the pair of screw shafts to adjust and connect the screw shafts;
An oil pan having a vibration damping function according to claim 1, comprising:   2. The oil pan having a vibration damping function according to claim 1, wherein the tension applying portion is a turnbuckle that adjustably connects a division interval of the two divided plates.   2. The oil pan having a vibration damping function according to claim 1, wherein the tension applying portion is a weld bead in which a plurality of streaks are added to the partition plate. 2. The oil pan having a damping function according to claim 1, wherein the tension applying portion is a heat applying portion wound around the partition plate.

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