JPS6318739Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oil cooler mounted on a cylinder block of an internal combustion engine, and more particularly to improvements in its mounting device.

When an oil cooler or an oil filter is attached to a cylinder block, they are usually attached separately, and passages for guiding lubricating oil to them are also provided individually. Therefore, the number of connecting parts and attachment devices that require sealing increases, and the volume of space occupied by these parts also increases.

An example of a conventional mounting device devised to eliminate such inconveniences is shown in Fig. 1.
-Refer to Publication No. 18491).

That is, as shown in the figure, by screwing the male threaded part provided on the boss part of the oil cooler 3 into the female threaded part provided at the opening of the lubricating oil return passage 2 which opens on the mounting seat surface of the cylinder block 1. The oil cooler 3 is fixed to the cylinder block 1. Furthermore, the female threaded part provided on the boss part of the oil filter 4 is screwed into the male threaded part provided on the boss part at the other end of the oil cooler 3, so that the oil filter 4 is mounted on the oil cooler 3. Laminated and fixed. The lubricating oil pressure-fed from the cylinder block 1 is cooled while passing through the lubricating oil passage 5 of the oil cooler 3, and after being filtered by the oil filter 4,
The lubricating oil returns to the cylinder block 1 via the lubricating oil return passage 6 of the oil cooler 3.

This one is oil cooler 3 and oil filter 4
Since these parts are stacked together and attached to the cylinder block 1, the number of parts is reduced compared to the case where these parts are attached individually, making it more compact. However, since the structure of the attachment part of the oil cooler 3 to the cylinder block 1 and the attachment part of the oil filter 4 to the oil cooler 3 are different, even if the oil cooler 3 is not required, only the oil filter 4 can be directly attached to the cylinder block. It cannot be attached to 1.
Therefore, even if oil cooler 3 is not required,
The oil filter 4 must be attached via the unnecessary oil cooler 3, which is not only uneconomical but also reduces space utilization efficiency.

The present invention has been made with attention to such problems, and in an oil cooler that is directly interposed in series between a cylinder block and an oil filter, the oil filter of the oil cooler is connected to the cylinder block and the oil filter. The first mounting seat surface is configured to have substantially the same shape as the second mounting seat surface provided on the cylinder block side to which the oil cooler is connected, and stud bolts are provided upright on the second mounting seat surface on the cylinder block side. A mounting bolt with a female threaded portion screwed onto the stud bolt provided on the hollow inner periphery of the lower end is inserted into an insertion hole provided in the oil cooler, and a flange formed on the upper end of the mounting bolt and the The oil cooler is interposed and fixed between the cylinder block and the second mounting seat surface, and a male threaded portion, which is the same as the stud bolt, is provided on the outer periphery of the upper end of the mounting bolt, and is screwed into the male threaded portion. A female screw portion is provided on the mounting surface of the oil filter, and the oil filter is attached to the first part of the oil cooler through the mounting bolt.
The above-mentioned inconvenience is solved by arranging the lubricating oil passage provided on the cylinder block side to circulate the lubricating oil to the oil filter via the oil cooler. The purpose is to

The present invention will be explained in detail below based on an embodiment shown in FIG.

That is, the mounting seat surface 10 (second mounting seat surface) to which the oil cooler 20 on the cylinder block side is connected has a circular lubricating oil outlet 11 that connects to an oil pump (not shown), and a lubricating oil inlet that connects to an oil gear gallery (not shown). 12, and a circular sealing surface 13 formed concentrically with the outer peripheral portion of the circular lubricating oil outlet 11. And lubricating oil inlet 1
A hollow stud bolt 14 serving as a mounting portion is screwed into the inner peripheral wall of the opening of No. 2 and erected therein.

Further, a bypass passage 16 having a one-way valve 15 interposed therein is provided between the lubricating oil outlet 11 and the lubricating oil inlet 12. For this reason, the oil filter 40
If lubricating oil is no longer supplied to the lubricating oil inlet 12 due to clogging, the one-way valve 15 opens due to the pressure difference between the lubricating oil outlet 11 and the lubricating oil inlet 12, and the lubricating oil is supplied via the bypass passage 16. Oil is supplied to the lubricating oil inlet 12 to prevent the engine from running out of lubricating oil.

The oil cooler 20 attached to the mounting seat surface 10 of the cylinder block has a lubricating oil inlet 21 corresponding to the lubricating oil outlet 11 of the cylinder block, and a sealing surface 13 of the cylinder block and an oil cooler 20 at the cylinder block side end. A seal ring material 22 is provided for sealing the joint portion with. The mounting seat surface 34 (first mounting seat surface) to which the oil filter 40 at the other end of the oil cooler 20 is connected is located at approximately the same position and shape as the seal surface 13 provided on the mounting seat surface 10 of the cylinder block. The lubricating oil outlet 2 opens at approximately the same position as the lubricating oil outlet 11 of the cylinder block.
4 are provided. Further, a mounting bolt insertion hole 25 is provided at the center of the oil cooler 20 through which a hollow mounting bolt 30 for fixing the oil cooler 20 to the mounting seat surface 10 of the cylinder block is inserted.

The structure of the oil cooler 20 is such that the lubricating oil that has entered the oil cooler 20 from the lubricating oil inlet 21 passes through the lubricating oil passage 26 of the oil cooler 20 and reaches the lubricating oil outlet 24 while the heat is transferred to the cooling fin 27.
Cooling is carried out by conducting the cooling water to the cooling water and dissipating it from the cooling fins 27 into the cooling water,
The cooling water is introduced into the oil cooler 20 from the inlet 28 installed toward a predetermined position,
The temperature of the lubricating oil increases due to the heat taken from the lubricating oil, and the lubricating oil flows out from the cooling water outlet 29 installed toward a predetermined position.

This oil cooler 20 has the lubricating oil inlet 21 and seal ring material 22 provided on the cylinder block side facing the lubricating oil outlet 11 and sealing surface 13 of the mounting seat surface 10 of the cylinder block, respectively. It is placed on the mounting seat surface 10. The oil cooler 20 has mounting bolt insertion holes 2
By screwing the female threaded portion provided on the inner periphery of the lower end of the mounting bolt 30 inserted into the stud bolt 14 into the stud bolt 14, the flange 31 formed at the upper end of the mounting bolt 30 and the mounting seat of the cylinder block are connected. The seal ring material 22 and the seal ring material 32 are interposed and fixed between the surface 10 and the surface 10 .

A male threaded portion 33, which is the same as that of the stud bolt 14, is provided on the outer circumference of the upper end of the mounting bolt 30 on the side having the flange portion 31, and an oil filter 40, which will be described below, is screwed into the male threaded portion 33.

The mounting surface of the oil filter 40, which is mounted in a stacked manner on the oil cooler 20, includes a sealing surface 23 of a mounting seat surface 34 provided at the end of the oil cooler 20 opposite to the cylinder block, and a circular lubricating oil outlet. A seal mechanism 41 and a lubricating oil inlet 42 are provided respectively corresponding to the lubricating oil inlet 24. On the other hand, the inner periphery of the boss portion 43 of the oil filter 40 is provided with a female threaded portion that screws into the male threaded portion 33 provided on the outer periphery of the end portion of the mounting bolt 30, and the oil filter 40 is tightened by its fastening force. It is laminated and fixed to the sealing surface 23 of the oil cooler 20 via the sealing mechanism 41. Note that 45 is a check valve that prevents backflow of lubricating oil.

With this configuration, the lubricating oil pumped from the oil pump (not shown) is guided from the lubricating oil outlet 11 opened in the mounting seat surface 10 of the cylinder block to the lubricating oil inlet 21 of the oil cooler 20, and the lubricating oil passage in the oil cooler 20 is guided. After passing through the lubricating oil outlet 24 of the oil cooler, it is sent to the oil filter 40. The lubricating oil led to the oil filter 40 enters the filter chamber 44 through the lubricating oil inlet 42 and is filtered and cleaned, and passes through the oil filter 40 outlet boss portion 43 to the inner peripheral wall of the hollow mounting bolt 30 and the hollow stud bolt 14. It passes through the linear lubricating oil passage created and reaches the lubricating oil inlet 12 of the mounting seat surface 10 of the cylinder block.

In addition to having the same cooling function as the conventional oil cooler as described above, in this embodiment, the seal surface 23 provided on the mounting seat surface 34 at the end of the lubricating oil outlet side of the oil cooler 20 and the lubricating oil The outlet 24 is connected to the cylinder block mounting seat 1, respectively.
A mounting bolt is formed in the same manner as the sealing surface 13 and lubricating oil outlet 11 of 0, and has a stud bolt 14 screwed into the mounting seat surface 10 on the cylinder block side, and whose lower end is screwed into the stud bolt 14. The male screw part 33 at the upper end that screws with the oil filter 40 of 30 is attached to the cylinder block mounting seat surface 10.
Since the male threaded part is the same as that of the hollow stud bolt 14 screwed into the lubricating oil inlet 12 of the
The oil filter 40 alone can be directly mounted on the cylinder block side by directly screwing the female threaded part provided on the inner periphery of the outlet boss part 43 into the stud bolt 14 screwed into the mounting seat surface 10. When the oil filter 40 is directly attached to the cylinder block, the seal mechanism 41 of the oil filter 40 is pressed against the seal surface 13, thereby reliably preventing leakage of lubricating oil.

Therefore, even if the oil cooler 20 is not required as in the conventional case, the waste of having to guide lubricating oil to the oil filter 40 via this unnecessary oil cooler 20 can be eliminated. By removing the unnecessary oil cooler 20, efficient use of space can be achieved. Furthermore, since the mounting bolt 30 is configured to be inserted into the insertion hole 25 of the oil cooler 20, the mounting bolt 30 is rotatable relative to the oil cooler 20, and when installing the oil cooler 20 on the cylinder block side, After positioning the extending direction of the cooling water inlet 28 and the cooling water outlet 29 with the oil cooler 20 placed on the mounting seat 10 on the cylinder block side, insert the mounting bolt 30 inserted into the insertion hole 25 into the stud bolt 14. The male threaded portion 3 of the mounting bolt 30 protrudes from the mounting seat surface 34 provided on the oil cooler 20 fixed in this way.
Since the oil filter 40 is screwed and fixed to 3,
It is possible to replace only the oil filter 40,
The maintainability of the oil cooler 20 and oil filter 40 is improved. Furthermore, the oil cooler 20 can be reliably interposed between the oil filter 40 and the cylinder block using only the mounting bolts 30, resulting in a mounting device with a minimum number of parts.

In addition, contrary to the above embodiment, if the amount of heat dissipated by one oil cooler is insufficient, multiple mounting bolts 30 may be used to stack and fix multiple oil coolers to increase the amount of heat dissipated and lubricate. It also becomes possible to enhance the cooling effect of oil.

As explained above, according to the present invention, in the oil cooler of the type that is directly interposed in series between the cylinder block and the oil filter, it is configured so that only the oil filter can be attached to the cylinder block side. When an oil cooler is not required, the oil filter can be installed directly on the cylinder block side, reducing costs and increasing space utilization efficiency.In addition, the mounting bolts can be tightened freely against the oil cooler, so the oil filter can be attached directly to the cylinder block. The oil cooler can be fixed after positioning.

[Brief explanation of the drawing]

Figure 1 shows a conventional example, where A is a partial longitudinal cross-sectional view and B
2 is a sectional view taken along the line A-A of the same as above, and FIG. 2 is a partial vertical sectional view showing an embodiment of the present invention. 10... Cylinder block mounting seat surface, 11...
...Cylinder block lubricating oil outlet, 12... Cylinder block lubricating oil inlet, 13... Seal surface of cylinder block mounting seat surface, 14... Stud bolt, 20... Oil cooler, 21... Oil cooler lubricating oil Inlet, 22...Oil cooler seal ring material, 23...Oil cooler sealing surface,
24...Oil cooler lubricating oil outlet, 25...Insertion hole, 30...Mounting bolt, 31...Brim portion, 3
3...Male thread part, 34...Mounting seat surface of oil cooler, 43...Outlet boss part.

Claims (1)

[Scope of utility model registration request] In an oil cooler that is directly interposed in series between a cylinder block and an oil filter, the oil cooler is provided with a first mounting surface to which the oil filter of the oil cooler is connected to the cylinder block side. It is configured to have approximately the same shape as the second mounting seat surface to which it is connected, and a stud bolt is provided upright on the second mounting seat surface on the side of the cylinder block, and the female threaded portion that is screwed into the stud bolt is formed on the hollow inner periphery of the lower end side. A mounting bolt provided on the cylinder block is inserted into an insertion hole provided on the oil cooler, and the oil cooler is interposed between a flange formed at the upper end of the mounting bolt and a second mounting seat surface on the cylinder block side. At the same time, a male threaded portion identical to the stud bolt is provided on the outer periphery of the upper end of the mounting bolt, and a female threaded portion that engages with the male threaded portion is provided on the mounting surface of the oil filter. The lubricating oil is configured to be stacked and fixed to the first mounting seat surface of the oil cooler via a mounting bolt, and the lubricating oil is circulated from the lubricating oil passage provided on the cylinder block side to the oil filter via the oil cooler. An oil cooler characterized by the following features.