JPH022889Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to an engine oil cooling adapter. Specifically, when bench testing an engine, it is used to circulate and supply cooling oil to the engine. This relates to an adapter that connects the

(Prior Art) Conventionally, as shown in FIGS. 5 and 6, the adapter main body 2' is formed in a three-pronged cylindrical shape, and the adapter body 2' is formed in a three-pronged cylindrical shape. The first cylindrical body 3' is screwed together, the second cylindrical body 4' is connected with a coupler 7' for the outgoing pipe leading to the outlet of the oil cooling device, and the third cylindrical body 5' is connected with the coupler 7' for the return pipe. A coupler 9' is provided. Furthermore, the first and second
An inner cylinder 12' having a circular cross section and bent into a substantially dogleg shape is fitted into the center hole of both cylinders 3' and 4'.
One side of this inner cylindrical body 12' is attached to a support plate 4 which also serves as a partition wall and which is fixed to the inner peripheral surface of the center hole of the second cylindrical body 4'.
It was supported in a cantilevered manner by a′. and,
The center hole of the inner cylindrical body 12' is an oil discharge passage 13',
An oil suction passage 14' communicating with the center hole of the third cylinder 5' is formed between the outer peripheral surface of the inner cylinder 12' and the inner peripheral surface of the center hole of the first cylinder 3'.

(Problems to be solved by the invention) In the conventional adapter in which the inner cylinder body 12' is supported in a cantilevered manner by the support plate 4a' with respect to the adapter body 2', it is difficult to drive the engine or drain the oil. Due to the flow, the inner cylindrical body 12' is easily vibrated relative to the adapter body 2', and the vibration of the inner cylindrical body 12' generates bubbles in the oil. Moreover,
There is a problem in that the load due to the vibration of the inner cylinder 12' acts concentratedly on the fitting portion between the inner cylinder 12' and the support plate 4a', resulting in damage to the inner cylinder 12'.

(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, this invention is designed to be screwed into a drain hole formed in an oil pan of an engine, and to be connected to a drain hole formed in an oil pan of an engine, and to The adapter body has two couplers for an outgoing pipe and a return pipe that respectively communicate with the port, and a cylindrical inner cylinder body having an oil discharge passage in the center is fitted into the center hole of the adapter body. The body is formed into a rectangular tube with a uniform cross-sectional shape, and a plurality of the outer peripheries of the corners of the rectangular tube are in contact with the inner circumferential wall surface of the center hole of the adapter body, and the outer circumference of the inner tube body and the inner circumferential wall surface of the center hole of the adapter body are in contact with each other. A plurality of straight oil suction passages are defined between the two.

(Function) In the engine oil cooling adapter configured as described above, a plurality of the outer peripheries of the corners of the square inner cylinder come into contact with the inner peripheral wall surface of the center hole of the adapter body, so that the inner cylinder It is supported stably and vibration of the inner cylinder relative to the adapter main body is prevented. Furthermore, a plurality of straight oil suction passages are defined between the outer periphery of the inner cylindrical body, which is formed into a rectangular cylinder with a uniform cross-sectional shape, and the inner peripheral wall surface of the center hole of the adapter body. Oil flows smoothly.

(Example) An example of this invention will be described below with reference to FIGS. 1 to 3.

In FIG. 2, an engine E undergoing a bench test is connected to an oil cooling system C via an adapter 1. In FIG. In FIG. 1, which shows the adapter 1 in longitudinal section, the adapter main body 2 includes an upper cylinder part 3,
It has a middle cylinder part 4 and a lower cylinder part 5 in series. An upper cylinder part 3 having a center hole whose upper end opens into the oil pan P
As shown in the figure, a male thread 3a that is screwed into a drain hole formed in an oil pan P of the engine E and a flange 3b that is in contact with the lower surface of the oil pan P are formed on the inner circumferential surface of the engine E. A first coupler 7 is disposed on the outer circumferential surface of the bottomed cylindrical lower tube portion 5 via a communication tube 6 whose one end is open to the center hole of the lower tube portion 5 . The outer peripheral surface of the bottomed cylindrical middle cylindrical part 4, which has a center hole suitably larger in diameter than the center hole of the upper cylindrical part 3 and communicates with the center hole, has one end connected to the center hole of the middle cylindrical part 4. A second coupler 9 is disposed via an open communication pipe 8. The first coupler 7 is connected to the other end of the outgoing pipe 10, one end of which is connected to the outlet of the oil cooling device C, and the second coupler 9 is connected to the other end of the outgoing pipe 10, one end of which is connected to the inlet of the oil cooling device C. The other end of the connected return pipe 11 is connected.

The inner cylindrical body 12 having the oil discharge passage B in the center is
As shown in FIGS. 1 and 3, it is formed into a cylindrical shape with a substantially triangular cross section that is inscribed with the inner peripheral surface of the center hole of the upper cylinder portion 3 of the adapter main body 2 with three contact points. The inner cylinder 12 is fitted across the center holes of the upper cylinder part 3 and middle cylinder part 4 of the adapter main body 2, and is supported internally on the inner peripheral surface of the center hole of the upper cylinder part 3. , is loosely fitted into the center hole of the middle cylinder portion 3 with a predetermined gap. And the inner cylinder body 12
An oil suction passage 14 is formed between the outer periphery of the upper cylinder part 3 and the inner peripheral surface of the center hole of the upper cylinder part 3, the upper end of which opens into the oil pan P, and the lower end of which opens into the center hole of the middle cylinder part 4. Furthermore, the upper end of the inner cylindrical body 12 protrudes from the upper end of the upper cylindrical part 3 of the adapter body 2 by a predetermined length, and the lower end of the inner cylindrical body 12 extends from the upper end of the upper cylindrical part 3 of the adapter body 2.
It is tightly fitted and supported in a fitting hole formed through the center of the bottom plate 4a. The upper end of the oil discharge passage 13 of the inner cylindrical body 12 opens into the oil pan P, and the lower end opens into the center hole of the lower cylindrical portion 5 of the adapter body 2.

In this embodiment configured as described above, when the engine E is subjected to a bench test, oil is circulated between the engine E and the oil cooling device C in the following manner. First, the oil cooled by the oil cooling device C is discharged from the discharge port of the device C, passes through the outgoing pipe 10, and is sent to the adapter body 2.
It flows into the center hole of the lower cylinder part 5. The oil flowing into the center hole of the lower cylindrical portion 5 of the adapter body 2 passes through the oil discharge passage 13 of the inner cylindrical body 12 and is supplied into the oil pan P of the engine E from the upper end opening of the discharge passage 13. Ru. On the other hand, the heated oil in the oil pan P flows from the oil suction passage 14 to the center hole of the middle cylinder part 4 of the adapter body 2, and then passes through the return pipe 11 and from the suction port of the oil cooling device C.
It is drawn into the device and cooled.

Since the inner cylindrical body 12 is formed into a cylindrical shape with a substantially triangular cross section inscribed in the center hole of the upper cylindrical portion 3 of the adapter body 2, the inner cylindrical body 12
is stably supported. Therefore, engine E
Vibration of the inner cylindrical body 12 relative to the adapter body 2 caused by the drive of the adapter and the flow of oil is prevented.

Further, in the above embodiment, the cross-sectional area of the oil discharge passage 13 of the inner cylinder 12 is formed between the outer peripheral surface of the inner cylinder 12 and the inner peripheral surface of the center hole of the upper cylinder part 3 of the adapter main body 2. The cross-sectional area of the oil suction passage 14 is set to be approximately the same as that of the oil suction passage 14, thereby smoothing the flow of oil.

In the above embodiment, the inner cylinder body 12 is formed into a cylinder shape with a substantially triangular cross section inscribed in the center hole of the upper cylinder part 3 of the adapter main body 2, but the invention is not limited to this. For example, as shown in FIG. 4, the inner cylindrical body 12 may be formed into a cylindrical shape with a substantially rectangular cross section and inscribed in the center hole of the upper cylindrical portion 3 of the adapter body 2. However, the oil discharge passage 13 of the inner cylinder body 12
The cross-sectional area of the oil suction passage 14 formed between the outer peripheral surface of the inner cylinder body 12 and the center hole of the upper cylinder part 3 of the adapter main body 2 can be set to be approximately the same area. desirable.

(Effects of the invention) As described above, according to this invention, a plurality of the outer peripheries of the corner portions of the inner cylinder of the square tube come into contact with the inner peripheral wall surface of the center hole of the adapter body, so that Since the inner cylinder can be supported stably, it is possible to prevent vibration of the inner cylinder and improve durability, and also prevent the generation of bubbles in the oil caused by vibration of the inner cylinder. There is an effect that can be done. Furthermore, a plurality of straight oil suction passages are defined between the outer periphery of the inner cylindrical body, which is formed into a rectangular cylinder with a uniform cross-sectional shape, and the inner circumferential wall surface of the center hole of the adapter body. , the oil flows smoothly at a nearly constant flow rate without speeding up or slowing down.
As a result, it is possible to prevent bubbles from forming in the oil suction passage due to changes in the oil flow velocity, and it also prevents dirt mixed in the oil from stagnating in the oil suction passage and clogging the oil suction passage. Malfunctions can also be prevented.

[Brief explanation of the drawing]

Figures 1 to 3 of the drawings show an embodiment of this invention, with Figure 1 being a longitudinal cross-sectional view of the adapter, and Figure 2 showing the state in which the engine and oil cooling system are connected by the adapter. FIG. 3 is a sectional view taken along the line -- in FIG. 1, and FIG. 4 is a plan sectional view showing an embodiment of the inner cylinder. Fig. 5 is a vertical cross-sectional view showing the conventional one, and Fig. 6 is the − of Fig. 5.
FIG. 1...Adapter, 2...Adapter body, 7...
1st coupler, 9...second coupler, 12...inner cylinder body, 13...oil discharge passage, 14...oil suction passage.

Claims (1)

[Scope of utility model registration request] An adapter body that is screwed into a drain hole formed in an oil pan of an engine and has both couplers for an outgoing pipe and a return pipe that communicate with the discharge port and suction port of the oil cooling device, respectively, the center hole of the adapter body A cylindrical inner cylinder body having an oil discharge passage in the center is fitted into the adapter body. Abuts against the inner circumferential wall of the center hole,
An engine oil cooling adapter characterized in that a plurality of straight oil suction passages are defined between the outer periphery of the inner cylindrical body and the inner circumferential wall surface of the center hole of the adapter body.