JPS6338332Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The invention is directed to the installation of a buttful plate interposed between the cylinder body of a water-cooled internal combustion engine and an oil cooler casing that is integrally joined to the cylinder body. In terms of structure, the buttful plate has a particularly simple structure that allows the mounting surface of the buttful plate to be removed from the mounting surface between the cylinder body and oil cooler casing, improving the sealing performance between them and preventing water leakage. This relates to the mounting structure.

[Technical background of the invention and its problems]

Generally, in a water-cooled internal combustion engine, the cooling water that is circulated and supplied from the radiator is as shown in Figure 1.
The lubricating oil first flows into the oil cooler casing a side to cool the oil cooler element b through which lubricating oil flows, and then flows into the cylinder body e side through the hole d formed in the bumpy plate c that guides the cooling water. The air flows between each cylinder bore and cools the surrounding area.

Conventionally, as a mounting structure for this type of buff-full plate, one shown in FIGS. 1 and 2 has been employed. Between the circumferential end g of the atmosphere-side opening f, which is the mounting surface on the cylinder body e side, and the circumferential end h, which is the mounting surface on the oil cooler casing a, which is like a lid that closes the opening f. is provided with a plate-shaped buttful plate c that is sandwiched between these plates and defines an opening f, and two annular packings i, i are interposed between these respective mounting surfaces in order to be liquid-tight. ,
Furthermore, remove the bolts j from the outside of the oil cooler casing a.
were screwed together to hold the whole thing together.

By the way, in the conventional mounting structure, there is a gap between the cylinder body e and the oil cooler casing a.
Since there are four mounting surfaces, that is, four sealing surfaces, the robustness between these surfaces is impaired and the sealing performance is poor.
There was a high possibility that water leakage would occur during operation.

[Purpose of invention]

The present invention has been devised in view of the above-mentioned problems and to effectively solve them.

The purpose of this invention is to eliminate the mounting surface of the buttful plate from the mounting surface between the cylinder body and oil cooler casing with a simple structure, improve the sealing performance between them, and prevent water leakage. The objective is to provide a mounting structure for

[Example of idea]

Next, a preferred embodiment of the mounting structure for the buff-full plate according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 3, the cylinder body 1 is formed with an opening 2 that is open to the atmosphere. This opening 2 serves as an inlet on the cylinder body 1 side of a cooling water passage 3 that circulates cooling water between cylinder bores (not shown) defined inside the cylinder body 1 to cool the surroundings thereof. The peripheral end 4 of this opening 2 is formed smoothly as a mounting surface on the cylinder body 1 side to which an oil cooler casing 5 (to be described later) is joined, and one end 4a has a longitudinal end as shown in FIG. A collar-shaped locking piece 6 is formed along the direction.

On the other hand, as shown in FIGS. 3 and 4, the oil cooler casing 5 has an accommodating section 5a formed in a U-shape in cross section for accommodating the oil cooler element 7, and the cylinder body 1 of the accommodating section 5a.
The side peripheral end portion is bent to form a lid that closes the opening 2 from the atmosphere side. A cooling water introduction pipe section 5b for introducing cooling water from the radiator is integrally formed in the storage section 5a. Furthermore, in this embodiment, the oil cooler casing 5 is
Since the storage portion 5a is formed to have a relatively smaller diameter than the inner diameter of the opening 2, the bent portion of the cylinder body 1 on the side opposite to the locking piece 6 has an enlarged partition wall portion 5c as shown in the figure. have. The peripheral end 8 of the oil cooler casing 5 is smoothly formed as a mounting surface, and as shown in FIG. A notch 9 is formed in line with the locking piece 6 .

As shown in FIGS. 3 and 4, the oil cooler casing 5 formed in this manner is provided with a baffle plate 10 on its inner wall, which partitions the storage portion 5a and the opening 2. This buttful plate 10 is formed by drawing a plate-shaped stainless steel plate material deeply toward the cylinder body 1 so as to surround the opening side end of the oil cooler element 7, and
The throttle part 10a has holes 11 as appropriate, and is configured to guide the cooling water that has flowed into the storage part 5a toward the cylinder body 1 side. One end of the buff-full plate 10 is fixed to the partition wall 5c of the oil cooler casing 5 with screws 12, etc., and is formed as a fixed end 13 of the buff-full plate 10 as a whole. On the other hand, the end opposite to the fixed end 13 is
Both ends are fastened with screws 12, etc., but the space between them is a free end 14 with a long span. This free end 14 has a constriction portion 10 as shown in FIG.
A locking portion 15 is formed which is folded back toward the a side and overhangs from the opening peripheral end 4, which is the mounting surface of the cylinder body 1, and which locks into the locking piece 6. Therefore, when the locking part 15 is locked to the locking piece 6 and the oil cooler casing 5 is urged toward the cylinder body 1, the locking part 15, which is the overhanging free end 14, is directed toward the locking piece 6. Although it was once biased, the spring force causes it to spring toward the notch 9, allowing the locking piece 6 and the notch 9 to come into close contact.

By the way, one annular packing 16 is interposed in a stacked manner between the peripheral end 4 of the opening of the cylinder body 1, which is the mounting surface, and the peripheral end 8 of the oil cooler casing 5. In order to make a liquid-tight seal and connect the whole thing, bolts 1 are installed in the stacking direction.
7... is screwed on. Once the whole is installed in this way, the locking piece 6 and the notch 9 can be brought into closer contact by the fastening force of the bolts 17, and the cylinder body 1 and the oil cooler casing 5 can be in close contact with each other. Can maintain high mounting surface pressure.

As described above, the mounting structure of the buttful plate according to the present invention is such that the buttful plate 10 is removed from the mounting surface between the cylinder body 1 and the oil cooler casing 5, and is mounted away from the atmosphere side with high surface pressure. The number of sealing surfaces between the cylinder body 1 and the oil cooler casing 5 can be reduced from the conventional four to two, and its robustness can be improved to prevent water leakage as much as possible.

In addition, conventionally, when attaching the oil cooler casing 5 to the cylinder body 1, a separate buttful plate, an oil cooler casing, and two annular packings were sequentially stacked and fastened with bolts, but in the present invention, Since the full plate 10 is attached to the oil cooler casing 5 in advance,
To attach this to the cylinder body 1, use one annular gasket 16 between each mounting surface.
It is only necessary to sandwich the parts, which simplifies and improves the efficiency of assembly work, and improves productivity as much as possible.

Furthermore, as in this embodiment, when the oil cooler element 7 has a smaller diameter than the inner diameter of the opening 2, the buttful plate 10 only needs to be formed to a size that partitions only the storage section 5a, which is different from the conventional method. It is not restricted by the diameter of the opening. Therefore, it is also possible to reduce the material cost of the buffful plate 10.

[Effect of idea]

As is clear from the above description, the present invention can exhibit the following excellent effects.

(1) The full plate is removed from the mounting surface between the cylinder body and oil cooler casing, and is installed away from the atmosphere side with high surface pressure, so the sealing surface between the cylinder body and oil cooler casing is The number can be reduced from the conventional four to two, and its robustness can be improved to prevent water leakage as much as possible.

(2) When attaching the oil cooler casing to the cylinder body, conventionally a separate buttful plate, oil cooler casing, and two annular packings were laminated in sequence, but in this invention, the buttful plate is attached in advance. Since it is attached to the oil cooler casing, it is only necessary to insert only one annular packing between them, which simplifies and improves the efficiency of the assembly work, and improves productivity as much as possible.

(3) The structure is simple and can be easily adopted.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing a conventional mounting structure for a buttful plate, Fig. 2 is an enlarged sectional view of section A in Fig. 1, and Fig. 3 is a preferred implementation of the mounting structure for a buttful plate according to the present invention. Side sectional view showing an example, No. 4
The figure is a view taken along the - line in FIG. 3, and FIG. 5 is an enlarged sectional view of section B in FIG. 3. In the figure, 1 is the cylinder body, 2 is its opening,
5 is an oil cooler casing, 6 is a locking piece, 10
13 is a fixed end, 14 is a free end, and 15 is a locking portion.

Claims (1)

[Scope of utility model registration request] In the mounting structure of a buttful plate that is interposed between a cylinder body opened to the atmosphere side and a lid-like oil cooler casing that closes the opening of the cylinder body and forms a cooling water passage,
One end of the buttful plate is fixed to the inner wall of the oil cooler casing to form a fixed end, and the opposite side thereof is a free end that is biased toward the oil cooler casing. A locking portion is formed, and a locking piece that engages with the locking portion is formed at one end of the opening of the cylinder body, and the opening of the cylinder body is closed with the oil cooler casing. A mounting structure for a buttful plate, characterized in that the locking portion is brought into close contact between the cylinder body and the oil cooler casing by the elastic force of the biased free end.