JPS60206961A - Structure of oil drain section and attaching method thereof - Google Patents

Abstract

PURPOSE:To surely attach a drain seat to an oil pan and as well to increase the sealing space so that the joint section of the drain hole end is surely sealed, by attaching the drain seat to the oil pan so that the drain hole edge section is held therebetween from both sides thereof. CONSTITUTION:An oil pan body 13 is formed by press-forming a vibration damping steel plate 10 formed of two steel plates 11, 12, and a drain hole 14 is formed in the bottom section thereof. A drain seat 14 having a circular cross- sectioned shape cylindrical section 30 is fitted in the drain hole 14. Threads are formed in the inner surface of the cylindrical body 30, and a drain plug 16 is threadedly engaged therewith. A mounting seat 17 having a diameter larger than that of the drain hole 14 and a flange section 18 are integrally incorporated with the outer peripheries of lower and intermediate sections of the cylindrical section 30, and the edge section 19 of the drain hole 19 in both steel plates 11, 12 is held between both members 17, 18 to hold the oil pan therebetween. Further, a sealing material 23 for sealing the joint section of the end of the drain hole 14 is filled in the seat space 21 defined among the mounting seat 17, the flange section 18 and the cylindrical section 30.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a method of attaching a drain part to an oil pan formed by laminated steel plates with i-layers through a synthetic resin layer.
Regarding the R construction and installation method, in particular, we aimed to improve the installation strength of the drain sheet to the oil pan, improve the sealing performance of the seam exposed at the end of the drain hole of the oil pan where it is installed, and improve the sealing performance of the 7j oil pan. This invention relates to a structure and method for attaching a drain part of an oil pan, which facilitates measures for energizing the synthetic resin layer during resistance welding between the oil pan and the drain sheath 1.

[Technical Background of the Invention] In order to damp vibrations from an internal combustion engine and reduce noise caused by vibrations, an oil pan formed of laminated steel plates instead of the conventional single steel plate has been considered. . The laminated steel plates used to form this oil pan are made by stacking two SPC steel plates or the like with a thickness of about 0.8 mm one above the other, with a viscous resin 11''!'i interposed in the middle. This resin layer, which has a high viscosity, allows the mutual shear vibration of the steel plates while absorbing their kinetic energy.

By the way, as shown in Fig. 1, the oil pan 1 is equipped with a drain sheet 2 at its bottom for a drain plug 30 for draining oil and discharging dust. In this case, it is necessary to take measures to prevent peeling of the mounting part and to apply electricity for resistance welding.In other words, the end of the drain hole of the oil pan to remove the drain hole 1. It is exposed to the outside, and if this exposure; As a result, the soundproofing effect is attenuated and the strength is reduced.
Therefore, measures against peeling are required. In order to projection weld a drain sheet to an oil pan, a current is applied from the drain sheet to the oil pan in the thickness direction, but since the middle layer of the oil pan is an IC which is an electrical insulator, it is difficult to conduct current as it is. I can't. To solve this problem, it is necessary to take measures to energize the oil pan in advance.

Therefore, as shown in Fig. 2, conventional oil pan '1
A sealing material 4 was applied to the seam formed at the drain hole end 3 to prevent oil etc. from entering.Also, a sealant 4 was applied to the drain hole edge 6, which is the peripheral edge of the drain hole 5. Spot weld 9 J, melt the synthetic resin layer 1, fl!
An energizing switch that electrically connects steel plates 7 and 7 to show 1)
8 was formed in advance. These ensured the sealing performance of the joint and the maintenance of the drain sheet 2 (=J strength lif).

[Problems with the back cover technology] However, according to the conventional method, oil pan 1
The seal 4 is placed in a small space formed by
Since A4 was applied, the sealing workability was poor and the seal 11 was unreliable. In addition, it is necessary to form the troublesome current-carrying sockets 1-0 before resistance welding the oil pans 1 and 1, which increases the number of man-hours for manufacturing the oil pans 1 and reduces productivity. The drawback was that it got worse.

[Objective of the Invention] The present invention has been made in view of the above-mentioned conventional drawbacks, and its purpose is to insert the drain port 1 into the drain hole edge from both sides of the drain pan, instead of inserting the drain port 1 into one side of the drain hole edge. By inserting the drain sheet into the A-ile pan in a sandwiching manner, drain sheets 1 to 1 can be reliably attached (G), and the sealing space is enlarged to ensure extremely reliable sealing of the joint at the end of the drain hole. The object of the present invention is to obtain a structure for attaching a drain part of an oil pan.

Furthermore, it is an object of the present invention to ensure a current-carrying path for the welding sump by simply inserting a drain sheet into the edge of the drain hole of the oil pan, without having to take any measures to carry the electricity separately from the "removal" work. To provide a method for attaching a drain part of an oil pan that can suppress an increase in the number of man-hours for manufacturing the oil pan and improve production efficiency.

[Summary of the Invention 1 The present invention, which meets the above object, comprises a cylindrical portion, a mounting seat provided at the lower part of the cylindrical portion, and a mounting seat provided on the outer periphery of the cylindrical portion with a stepped mounting spaced apart from the seat at a predetermined interval. The drain sheet with the flange fixed is inserted into the drain hole of the oil pan molded from a laminated steel plate, the edge of the drain hole is sandwiched between the mounting seat and the flange, and the drain sheet is inserted between the mounting seat and the flange. The drain hole and the end of the drain hole are filled with a sealing material. This allows a large sealing space to be formed between the drain hole edge (= J seat and flange), and prevents a shortage of sealing material or
v Ii In addition to preventing the IEi from being exposed, the drain sheet should be supported on both sides instead of one side, so that the inserted drain sheet is not exposed to external force or vibration and may fall. I tried not to do that.

J. The present invention, which meets the above objectives, is easy to fit together even though the diameters are expanded, and after fitting,
Based on the knowledge that a strong connection is possible by a series of actions of reducing the diameter of one side and crimping it, and that a conductive path is secured by crimping the conductive part 4A, the structure was constructed as follows. This is what I did. That is, the diameter of the drain hole of a molded oil pan made of laminated steel plates is enlarged, and the mounting seat and flange are integrally mounted on the cylindrical portion in the enlarged drain hole of the oil pan. Insert a drain sheet filled with sealing material between the seat, the flange, and the cylindrical part, reduce the diameter of the drain hole so that the edge of the drain hole of the oil pan fits between the mounting seat and the flange, and then insert the drain sheet into the flange. The drain hole edge is held between the mounting seat and the flange by crimping, and then the mounting seat and the drain hole edge are welded.

[Embodiments of the Invention] Hereinafter, a preferred embodiment of the present invention will be described in detail based on the accompanying drawings. In this embodiment, a vibration damping steel plate formed with a viscous synthetic resin layer interposed between the steel plates will be described.

As shown in FIG. 3, the steel plate 10 consists of two steel plates 11
．． 12, with a viscous resin layer interposed between them to damp vibration. An oil pan body 13 is formed by pressing the vibration damping steel plate 10, and a drain hole 14 for inserting a drain sheet is formed in the bottom of the oil pan body 13.

In the drain hole 14 of the oil pan body 13, drains 1 to 15 each having a cylinder portion 30 having a circular cross section are inserted +1 Ti. The cross section may be polygonal. A threaded thread is provided on the inner periphery of the cylindrical portion 30 of the drain sheath 1-15, and a bolt-shaped drain plug 16 is screwed onto this thread. Further, a mounting seat 17 and a flange portion 18 having a diameter larger than the drain hole 14 are integrally provided around the entire outer periphery of the lower end portion and the intermediate portion of the cylindrical portion 30. Of course, the flange portions 18 may be provided at predetermined intervals in the circumferential direction.

The handle 1 seat 17 is fitted to the drain hole edge 1t of the outer steel plate 12, and a part of the engagement surface is projected along the circumferential direction to connect the two and prevent oil leakage. 1 welding 20
has been done.

The flange 18 falls down and bites into the drain hole edge 19 of the inner steel plate 11, and the A-il pan body 13 is held between the flange 18 and the mounting seat 17 at 1741. In addition, as shown in the example,
Preferably, the outer diameter of the flange portion 18 is smaller than the width of the mounting JJ-17.

The entire circumference of the proximal end of the flange 18 and the mounting seat 17 and the tube yi11
In the seat space 21 formed between the flange 18 and the mounting seat 17, there is an exposed end of the drain hole of the oil pan body 13 held between the flange 18 and the mounting seat 17. A sealing material 23 for sealing the eyes 22 is filled.

The oil pan drain seat mounting structure is configured in this manner.

Note that the mounting seat 17 for the cylindrical portion 3o of the drain sheet 15
The positional relationship between the flange portion 18 and the flange portion 18 may be reversed.

Next, a method of attaching the above practical example will be explained with reference to FIG. 4.

First, on the oil pan body 13 side, drain drains 1 and 15 into the drain hole 14 of the oil pan body 13 at the flange 18.
The drain hole 14 is previously enlarged in diameter to be larger than the outer diameter of the raised flange 18 so that the drain hole 14 can be inserted up to the maximum diameter. As shown in the illustrated example, there is a method of pressing the drain hole edge 19 on the inner steel plate 11 side to protrude the diameter in one step.
This is ha'b convenient. In addition, drain sheet 15
On the side, the entire circumference of the seat space 21 is filled with a sealing material 23 such as silicone-based or epoxy-based, while the protrusion 25 for pro-jicon welding is cured in the circumferential direction of the tip of the mounting 817. Formed and J3.

Then, the mounting seat 17 is engaged with the steel plate 12 on the outside of the drain hole edge 19 that is not pressed, and the drain holes 1 to 15 are
After inserting and supporting the mounting seat 17 with the lower electrode 26C, lower the leading punch 27 positioned above the protruding I drain hole edge 19, and then lower the flange 18 of the drain holes 1 to 15.
The protruding drain hole edge 19 is pushed under to reduce the diameter of the drain hole 14.

Following this diameter reduction operation, the caulking bond 28 located above the collar 18 is lowered and the drain hole edge 19 is pushed in.
The flange 18 is tightened to prevent the flange 18 from being pinched between the flange 18 and the mounting seat 17. This crimping force causes the inner steel plate 11 to break through the intermediate synthetic resin layer with the tip of the flange 18, and the inner steel plate 11 to be attached to the outer steel plate 12.
It requires enough force to penetrate into the inside and outside of the device and form a current-carrying path between the inside and the outside.

At the same time as or after the completion of the crimping operation, lower the two upper electrodes located above the position of the protrusion 25 formed on the mounting seat 17, and attach the oil pan main body 13 to the protrusion 2 in the thickness direction.
A current is applied to the lower electrode 2G via the protrusion 25.
Prong 1 prongsion welding is performed to the steel plate 12 on the outside of the mounting seat 17 at the section.

Thus, the drain part installation 1:'r construction shown in FIG. 3 is completed.

Therefore, in a series of operating steps of the preceding bonder 27, crimping punch 28, and upper electrode 29, the drain hole edge 19
Double-sided clamping and sealing material 23 for drains 1 to 15
Sealing of the first seam at the end of the drain hole, securing of the current conduction path of the oil pan body 13 by the flange 18, and prong welding are automatically performed.

[Effects of the Invention] In short, the present invention exhibits the following excellent effects.

(1) Since the Drain Seat 1 is attached to the Drain Seat 1 by sandwiching the edge of the drain hole between the Drain Seat Flange and the holder (q seat), the Drain Seat 1 is installed in a double-sided support groove structure, so the installation strength is only when supported on one side. The drain plug 17 will not rattle or fall off from the drain pan due to external force or vibration between the internal combustion points. The structure is such that a sealing material is filled between the mounting seat and the cylindrical part, so a large sealing space can be secured and the sealing of the joints, which is a problem especially when using F5 steel plate for the oil pan, is avoided. This can be done extremely reliably.

(2) By caulking the flange, an energizing path for welding is formed in the thickness direction of the oil pan, so energizing is required separately from the installation work that is particularly required when laminated steel plates are used for the oil pan. 7 II measures! ! This eliminates the need for oil pan manufacturing and reduces the number of man-hours required to manufacture the oil pan.Also, by adopting a method that allows for continuous operation of expanding and contracting the diameter of the drain hole and caulking the flange, workability is improved. The productivity of the Dodori oil pan is greatly improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an oil pan, FIG. 2 is a sectional view showing a conventional A" oil pan drain mounting structure, and FIG. 3 is a preferred embodiment of an oil pan drain mounting structure according to the present invention. The cross-sectional view shown in FIG. 4 is a cross-sectional view for explaining the installation method. In the figure, 10 is a vibration damping steel plate which is an example of a laminated steel plate, 13 is an oil pan main body, 14 is a drain hole of the oil pan main body, 1
5 is a drain sheet, 17 is a drain sheet mounting seat, 18
19 is the flange of the drain seat, 19 is the drain hole edge of the oil pan body, 20 is projection welding, which is an example of welding, 21 is the seat space formed by the mounting seat, the flange, and the cylinder, and 22 is exposed. A seam at the end of the drain hole, 23 is a sealing material, and 30 is a cylindrical portion of the drain ports 1 to 1. Patent Application Nobuo Kinutani, Patent Attorney, Tokyo Radiator Manufacturing Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 5 Figure 4

Claims (1)

[Claims] (1) A cylindrical portion, a mounting seat provided at the bottom of the cylindrical portion,
A drain seat 1-, which is provided with a flange provided at a predetermined distance from the NJ seat on the outer periphery of the neck, is inserted into a drain hole of an oil pan formed from a laminated steel plate, and the Off mounting seat and Drain part number I structure of an oil pan, characterized in that the edge of the drain hole is held between the flange and a seal opening is filled in the flange of the mounting seat and the end of the drain hole.
Notice. (QeJ characterized in that the flange parts marked with z+ and J- are provided at predetermined intervals in the circumferential direction of the tube ThB of the drain seat:'r Requirements Range Drain part of the oil pan according to item 1 Mounting structure. (3) Claim 1 or 2, characterized in that the cylindrical section of the drain sheath 1- has a polygonal cross section.
Drain part of the oil pan of the sword. (4) Expand the diameter of the drain hole of the molded oil pan made of laminated steel plates, and attach the cylindrical portion to the expanded drain hole of the oil pan f=i It! A drain hole 1-, which has a flange integrally and is filled with a sealing material in advance between the mounting seat, the flange, and the cylindrical portion, is inserted, and the edge of the drain hole of the oil pan is inserted between the mounting seat and the flange. Tighten the drain hole so that the
The oil pan is characterized in that the edge of the drain hole is held between the seat and the flange, and then the mounting seat and the edge of the drain hole are welded together. Drain part number f” method. (5) The oil pan drain Bll mounting method according to claim 4, wherein the welding between the mounting seat and the edge of the drain hole is prodieximin welding.