JPH064226Y2 - Housingless oil cooler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a housingless oil cooler.

(Prior Art) An example of a conventional housingless type oil cooler is Shokai 61-1.
It is disclosed in Japanese Patent No. 44379. That is, dish-shaped plates having flanges on the central opening peripheral edge and the outer peripheral edge are stacked to form a layered vacant chamber, and the vacant chambers are communicated with every other layer to provide an oil flow channel and a water flow channel to form a cooler core. There is. An upper end plate is fixed to the upper end of the upper plate, and an upper plate having an annular cavity formed of an upper wall, an outer peripheral wall and an inner peripheral wall is further fixed to the upper surface of the upper plate. The cavity portion communicates with the oil passage of the layered chamber through an opening provided in the upper end plate, and is opened to the outside by an oil passage hole provided in the upper plate. At the lower end of the layered chamber, a lower end plate and a chamber made of a steel plate are provided on the lower surface thereof, and a partition plate that divides the interior into an oil supply chamber, a water supply chamber, and a drainage chamber is inserted. The water supply chamber and the drainage chamber communicate with the water flow path of the layered empty chamber and the oil supply chamber communicates with the oil flow path of the layered empty chamber through the openings provided in the lower end plate.

In this oil cooler, an oil filter is usually placed on an upper plate, and is tightened by a connector pipe penetrating the central opening and attached to an engine block. The oil outlet of the engine block communicates with the oil supply chamber in the chamber, the oil passage hole of the upper plate communicates with the inlet opening of the oil filter, and the oil exiting the oil filter passes through the oil connector pipe and returns to the engine block. . The cooling water of the oil cooler flows in and out through a pipe connected to the water supply chamber and the drainage chamber of the lower chamber.

Further, the plate type oil cooler disclosed in Japanese Patent Laid-Open No. 61-223213, as shown in FIG. 3 and FIG.
An annular cover plate 14 is fixed to the uppermost part to form an oil outlet passage, and a bottom chamber 15 is further provided to the lower part, and a partition wall 21 defines an oil inlet chamber 16, a water inlet chamber 17, and a water outlet chamber 18. Is made. Similarly to the former case, this oil cooler has an oil filter placed on the upper surface of the oil cooler, and is attached to the engine block with a connector pipe and tightened.

(Problems to be solved by the invention) When the conventional oil cooler as described above is tightened by the connector pipe, the upper wall of the former upper plate or the latter cover plate becomes the seating surface of the oil filter, and the inner surface thereof is empty. Since it is a cavity, the rigidity is insufficient and the upper wall is dented, causing distortion such that the inner and outer peripheral walls swell, resulting in peeling of brazing and oil leakage.

Further, when the oil filter is mounted on the oil cooler in a stacked manner, it becomes taller, so that the vibration resistance is weak against lateral vibration when the engine is vibrated. Among them, the former chamber or the latter bottom chamber is a base for attachment to the engine block, so that a particularly strong moment acts. On the other hand, all of the conventional ones are made of steel plate, the former forms the oil supply chamber, the water supply chamber, and the drainage chamber, and the latter forms the oil inlet chamber, water inlet chamber, and water outlet chamber corresponding to these. , Both are hollow. Therefore, the crush resistance tends to be insufficient with respect to the tightening force of the connector pipe, and the strength is insufficient with respect to the strong moment in the above-mentioned lateral vibration, resulting in crushing of the mounting base and oil leakage from the mounting surface. And so on.

(Means for Solving the Problems) The housingless oil cooler of the present invention is an oil cooler in which dish-shaped plates having a central opening are stacked to form a layered empty space, and the empty spaces are communicated with every other layer. A cooler core that forms a flow path for water and water is formed, and a patch plate extending from the upper wall of the upper plate to the inner and outer peripheral walls is fixed to the inner surface of an annular upper plate provided on the upper surface of the cooler core. The partition wall defines an oil supply chamber, a water supply chamber, and a drainage chamber, and a short cylindrical lower cover made of integrally molded casting is fixed.

(Function) The oil cooler of the present invention has an oil filter placed on the upper portion thereof and is attached to the engine block by being tightened by a connector pipe, and receives vibration from the engine or the vehicle during use.

For tightening with a connector pipe, an annular upper plate that serves as a seating surface for the oil filter is provided with a patch plate extending from the upper wall to the inner and outer peripheral walls, and the lower cover is a short cylindrical integrally molded casting having a partition wall. Since it is formed, it has sufficient compressive strength.

Also, the lower cover, which is a mounting part to the engine block, receives a strong rolling moment, but since the lower cover is a short cylinder and is an integrally molded casting having a partition wall inside,
There is sufficient vibration resistance and there is no risk of crushing or damage.

(Example) An example is shown in FIG. 1 and FIG. The housingless type oil cooler 1 is formed by stacking annular plate-shaped plates 2 each having a flange on the outer periphery and a peripheral edge of a central opening to form a layered empty chamber, and connecting every other layer with a communicating pipe alternately penetrating between layers. A cooler core 5 in which the oil passages 3 and the water passages 4 are formed in layers to connect the chambers is provided. An upper end plate 6 is fixed to the upper end surface of the cooler core 5, and an upper plate 7 is fixed to the upper surface thereof. The upper plate 7 is an annular upper wall 7a and an outer peripheral wall 7
b, the inner peripheral wall 7c, and the inside forms an annular cavity portion 8. An oil passage hole 7d is provided in the inner peripheral wall 7c, and the oil passage 3 and the cavity 8 are communicated with each other through the opening of the upper end plate 6 and opened to the outside through the passage hole 7d. An annular lower end plate 9 is fixed to the lower end surface of the cooler core 5 and has a short cylindrical shape on the lower surface thereof. The lower cover 10 of the one-piece molded casting, which is partitioned into, is fixed (Fig. 3). Refueling room 10
The a communicates with the oil flow path 3 through the opening of the lower end plate 9 and also communicates with the oil outlet of the engine block through the bottom opening. The water supply chamber 10b and the drainage chamber 10c respectively communicate with the water flow path 4 through the openings of the lower end plate 9 and are connected with a water supply pipe and a drainage pipe.

On the inner surface of the upper plate 7, from the upper wall 7a to the outer peripheral wall 7b, the inner peripheral wall 7c
The patch plate 11 is fixedly attached to form a reinforcing plate. Further, the lower cover 10 is an integrally molded casting, and has a higher strength than the conventional steel plate chamber.

In this oil cooler 1, an oil filter 15 is stacked on the upper plate 7 and an engine block is formed by a connector pipe 16.
Used after being tightened to 37. Oil enters the oil filter 15 from the engine block through the oil supply chamber 10a, the oil flow path 3, and the through hole 7 of the inner cavity 8 and returns to the engine block through the inside of the connector pipe 16. The upper plate 7 receives the tightening force from the oil filter 15, but the patch plate 11
It is reinforced with and does not distort. Further, the lower cover 10 at the lower end is stronger than a conventional steel plate chamber.

Next, a second embodiment is shown in FIGS. The housingless type oil cooler 21 is formed by stacking annular plate-shaped plates 22 each having a flange on the outer periphery and the peripheral edge of the central opening to form a layered space, and connecting every other layer by connecting communication pipes alternately connecting the layers. A cooler core 25 in which an oil flow path 23 and a water flow path 24 are formed in layers to communicate with each other is provided. Cooler core 25
An annular upper end plate 26 is fixed to the upper end surface of the, and an upper plate 27 is fixed to the upper part thereof. The upper plate 27 is provided with an annular upper wall 27a, an outer peripheral wall 27b, and an inner peripheral wall 27c, and the inside thereof forms an inner cavity portion 28. A partition wall 27e is provided in the bore 28.
Is provided to divide the lumen into an upper lumen 28a and a lower lumen 28b. The upper inner cavity 28a is opened to the outside through a through hole 27d provided in the inner peripheral wall 27c, and an oil passage 23 of the cooler core 25 and a flow-through pipe 32 provided through the water passage 24 through an opening of the upper end plate 26. Communicate. The lower inner cavity 28b communicates with the oil flow path 23 through the opening of the upper end plate 26. An annular lower end plate 29 is fixed to the lower end surface of the cooler core 25, and a lower surface of the lower end plate 29 has a short cylindrical shape and is divided into two parts, that is, the inside of the oil supply chamber 30a and the oil discharge chamber 3
The integrally formed cast lower cover 30 that is partitioned into 0d, the water supply chamber 30b, and the drainage chamber 30c is fixed. (FIG. 7) The oil supply chamber 30a communicates with the flow-through pipe 32 through the opening of the lower end plate 29, and also communicates with the oil outlet of the engine block through the opening at the bottom. The oil discharge chamber 30d communicates with the oil flow path 23 through the opening of the lower end plate 29. Each of the water supply chamber 30b and the drainage chamber 30c communicates with the water flow path 24 through the opening of the lower end plate 29 and is connected with a water supply pipe and a drainage pipe.

A patch plate 31 is fixed to the inner surface of the upper plate 27 from the upper wall 27a to the outer peripheral wall 27b and the inner peripheral wall 27c to form a reinforcing plate. Further, the lower cover 30 at the lower end is stronger than the steel plate chamber.

The oil cooler 21 has an oil filter on the upper surface of the upper plate.
35 are stacked and fastened by a connector pipe 36 penetrating the central opening of the oil cooler 21 and attached to the engine block. Oil is supplied from the engine block to the oil supply chamber 30
a, through-flow pipe 32, upper lumen 28a, and oil filter 35
Enter Since the inside of the connector pipe 36 is divided into upper and lower parts and side holes are provided in each part, the oil that has exited the oil filter 35 flows from the upper part inside the connector pipe 36 to the lower part cavity 28.
Entering b, entering the oil passage 23, exchanging heat with the cooling water in the water passage 24, entering the lower part of the inside of the connector 36 from the oil discharge chamber 30d, and returning to the engine block. Since the patch plate 31 is fixed to the upper plate 27, it is not distorted by tightening.

(Effect) In the housingless oil cooler of the present invention, a patch plate extending from the upper wall to the inner and outer peripheral walls is fixed and reinforced on the upper plate serving as a seating surface of the oil filter to be laid on the upper plate, so that the upper plate has an inner cavity. Even if it has a shape with a part, it will not distort and will not leak when tightening, and the lower oil supply and water supply / drainage chamber parts are also made of a lower cover of integrally molded casting with partition walls, so it is sufficient for compression by tightening force. Since it has sufficient strength and has sufficient vibration resistance against vibrations, especially strong moments acting on the mounting base, the durability and reliability of the lubricating oil passage including the oil cooler and the oil filter are improved.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of the embodiment, and FIG. 2 is another longitudinal sectional view of the embodiment of FIG. FIG. 3 is a cross section taken along the line AA of the lower cover of FIG. FIG. 4 is a vertical sectional view showing another embodiment, and FIGS. 5 and 6 are other vertical sectional views of the embodiment of FIG. 4, respectively. FIG. 7 shows B of the lower cover of FIG.
-B is a cross section. 2, 22 ... Plate, 3, 23 ... Oil flow path 4, 24 ... Water flow path, 6, 26 ... Top plate 7, 27 ... Upper plate, 8, 28 ... Cavity section 10, 30 ... … Lower cover, 11,31 …… Patch plate 15,35 …… Oil filter 16,36 …… Connector pipe, 27e …… Partition wall 32 …… Flow-through pipe

Claims (1)

[Scope of utility model registration request] 1. A plate-shaped plate having a central opening is stacked to form a layered vacant chamber, and the vacant chambers are communicated with every other layer on the upper surface of a cooler core in which oil and water flow paths are alternately formed. An annular upper plate having an upper wall, an outer peripheral wall, and an inner peripheral wall having an oil passage is fixed, a patch plate extending from the upper wall to the inner and outer peripheral walls is fixed to the inner surface of the upper plate, and further on the lower surface of the cooler core, A bottom cover made of an integrally molded casting that has a short cylindrical shape and has a partition wall inside to define the oil supply chamber, the water supply chamber, and the drainage chamber is fixedly attached, and the oil supply chamber is attached to one end of the oil flow passage and also to the water supply chamber. A housingless oil cooler that connects the drainage chamber to one end and the other end of the water flow path.