JP2514401Y2 - Housingless oil cooler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present application relates to a housingless oil cooler mainly used for cooling oil in an internal combustion engine.

[Prior Art] A housingless type oil cooler is one in which a plurality of disc-shaped plates are stacked and fitted around each other, and an oil chamber and a cooling water chamber are formed between these plates. It features a structure without a housing.
An oil cooler of this type is disclosed, for example, in Japanese Utility Model Laid-Open No. Sho 63-109866. Explaining what has the same meaning as that shown here, as shown in FIG. 6, a housinging type oil cooler is composed of an annular cover body 1, an annular core body 2 and a thin plate made of a relatively thick material. It is formed of a ring-shaped sheet body 3. The cover body 1 is provided with an oil inlet chamber 4, a cooling inlet chamber 5, and a cooling water outlet chamber defined therein. The core body 2 is 4 around the central opening.
A large number of disc-shaped plates provided with individual openings are stacked, and oil chambers and cooling water chambers are alternately formed between them. The oil chambers communicate with the oil inlet chamber 4 of the cover body 1, and the cooling water chambers are The cooling water chamber inlet chamber 5 and the cooling water outlet chamber are connected in series. The sheet body 3 has an annular chamber shape, and the inside thereof communicates with the oil chamber of the core body 2. The inside of the sheet body 3 is open to the outside through an opening 6. The central portion of each of the cover body 1, the core body 2 and the sheet body 3 is open. Hollow mounting bolts (not shown) are inserted into these openings, a screw-in type oil filter or a cover plate is fixed to the upper ends thereof, and the lower ends of the mounting bolts are mounted to the engine block.

The oil from the engine passes through the cover body 1 and enters the oil chamber of the core body 2, then reaches the inside of the seat body 3, and further flows down through the mounting bolt to return to the engine. On the other hand, the cooling water flows from the cooling water inlet chamber of the cover body 1 to the core body 2
Of the cooling water, and returns to the cooling water outlet chamber of the cover body 1. During this time, the oil is cooled.

[Problems to be Solved by the Invention] The oil cooler having the above-described structure is to be used after an oil filter or a cover plate is placed on the sheet body 3 and clamped and fixed. However, the sheet body 3 is formed by drawing a thin plate and has insufficient structural strength, and when a tightening load is applied, the sheet body 3 is deformed to cause a seal failure or damage. Further, the sheet body 3 is formed by breath molding, but when the height of the sheet body 3 increases, deep drawing occurs, the inner and outer annular side walls become thin, and the pierce-molded opening 6 is deformed into an elliptical shape. There is also a drawback that it is difficult to obtain a material having good flow path resistance and durability performance due to damage or breakage. Further, since the sheet body 3 is deep-drawing pressed, it is difficult to obtain flatness of the joint surface with the core body 2 and the upper surface on which the oil filter is mounted, and there is a high risk of defective brazing and defective sealing.

[Means for Solving the Problem] A sheet body is mounted on a core body in which a large number of disc-shaped plates are stacked and an oil chamber and a cooling chamber are alternately provided between them, and the sheet body and the oil chamber of the core body are communicated with each other. In the housingless oil cooler, the seat body has an annular flat inner peripheral portion around the central opening, and an inner diameter of the inner peripheral portion is outside and above the inner peripheral portion. It has an annular and flat outer peripheral portion that is larger than the outer diameter, and further, the inner peripheral portion and the outer peripheral portion are connected by an outer peripheral surface lower surface of the seat plate and the upper end plate of the core body, which are connected by an inclined wall having a communication opening. A housingless type oil cooler, characterized in that an annular wall having a partial thickness is arranged and joined between them.

[Operation] When the oil filter or the cover plate is tightened on the sheet body, a force acts on the sheet body, but the force is received by the annular wall and deformation is prevented. The sheet plate that constitutes the sheet body does not need to be processed by deep drawing, and breakage of the communication port of the inclined wall is prevented.

[Embodiment] FIG. 1 and FIG. 2 show an oil cooler showing an embodiment of the present invention, which has a core body 11 on a cover body 10 and a sheet body 12 on the core body. There is. The cover body 10 has inner and outer peripheral walls 13, 14 on the inner and outer peripheries of a bottom plate 35 provided with a central opening 36, and at least a cooling water inlet chamber 15, a cooling water outlet chamber 16, and an oil inlet chamber 17 are provided between the inner and outer peripheral walls 13, 14. Are formed and these are isolated from each other. Communication pipes in the cooling water inlet / outlet chambers 15 and 16
18 and 19, and a communication port 20 is provided in the bottom wall of the oil inlet chamber 17, respectively.

The core body 11 has a central opening 21 as shown in FIGS.
Openings 22, 23 formed by stacking a large number of disc-shaped plates 26 around which four openings 22, 23, 24, 25 are provided
Has annular flanges 22a, 23a directed downward on the peripheral edge, and openings 24, 25 have annular flanges 24a, 2a directed upward on the peripheral edge.
5a. Annular flanges 26a, 21a directed downward are also provided on the outer periphery of the plate 26 and the peripheral edge of the central opening 21. When stacking the plates 26,
Stagger and stack. As a result, between each plate 26,
Oil chambers and cooling water chambers are formed alternately.
An upper end plate 28 provided with an oil outlet 27 communicating with the oil chamber is fixed to the upper surfaces of the stacked plates 26, 26 ... And an oil inlet communicating with the oil chamber is provided on the lower surface,
A cooling water inlet / outlet 30 communicating with the inlet / outlet side of the cooling water chamber,
A lower end plate 32 provided with 31 is fixed. In this way, the core body 11 is formed.

The cover body 10 is joined to the lower end plate 32 of the core body 11,
The oil chamber of the core body 11 and the oil inlet chamber 17 of the cover body 10 communicate with each other, and the cooling water chamber of the core body 11 and the cooling water inlets and outlets 15 and 16 of the cover body 10 communicate with each other.

The sheet body 12 includes a thin sheet plate 33 and an annular wall 34 having a partial thickness. The seat plate 33 has an inner peripheral portion 33b formed annularly and flat around the central opening 33a, and the inner diameter is larger than the outer diameter of the inner peripheral portion at a position outside and above the inner peripheral portion. The outer peripheral portion 33c is formed in an annular flat shape, and the inner peripheral portion 33b and the outer peripheral portion 33c are connected by the inclined portion 33e having the communication port 33d. Between the lower surface of the outer peripheral portion 33c and the upper surface of the outer peripheral portion of the upper end plate 28 of the core body 11, an annular wall 34 having a thickness in both the vertical direction and the radial direction is sandwiched and fixed. The annular wall shown in FIGS. 1 and 2.
The cross-sectional shape of 34 is an inverted trapezoidal shape in which the inner circumference is a flat inclined surface, but it is also possible to use an annular wall 34a having a spherical inner circumference as shown in FIG.

In FIGS. 1 and 2, a screw type oil filter or a cover plate (neither is shown) is provided on the sheet body 12.
The hollow mounting bolts (not shown) inserted in the central openings 32a and 36 are screwed onto the upper ends, and the lower ends are connected to the engine block for use. Oil from the engine block is introduced into the oil inlet chamber 17 from the communication port 20 of the cover body 10, reaches the oil chamber of the core body 11 from there, and flows out from the oil chamber to the oil outlet port 27. Further, the oil enters the sheet body 12 and flows out through the communication port 33d. When the lid plate is mounted on the seat body 12, the oil flows down through the hollow mounting bolt and is returned to the engine block. On the other hand, the cooling water flows in from the communication pipe 18 of the cover body 10, sequentially flows through the cooling water inlet chamber 15, the cooling water chamber of the core body 11 and the cooling water outlet chamber 16 of the cover body 10, and flows out from the communication pipe 19. To do. During this time, the oil is cooled.

[Effect] As described above, in the oil cooler of the present invention, the sheet body is formed by the annular wall having the thickness and the sheet plate both in the vertical direction and the radial direction. Even if the filter is used by being fixed by tightening, it will not be damaged by the tightening load and the flatness will be good, so that the sealing property will be excellent. Further, since the sheet body does not need to be deep-drawn, it does not have to be cut and does not leak due to crack damage or the like due to long-term use.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is another sectional view of the same embodiment, FIG. 3 is a plan view of a plate used in the embodiment of the present invention, and FIG. FIG. 5 is a sectional view of another example of the annular wall used in the embodiment of the present invention, and FIG. 6 is a sectional view of a conventional housingless oil cooler. 11 …… Core body, 12 …… Seat body 33a …… Center opening, 33b …… Inner peripheral portion 33c …… Outer peripheral portion, 33d …… Communication port 33e …… Seat plate, 34, 34a …… Annular wall

Claims (1)

(57) [Scope of utility model registration request] 1. A housingless structure in which a sheet body is mounted on a core body in which a plurality of disc-shaped plates are laminated and an oil chamber and a cooling chamber are alternately provided between them, and the sheet body and the oil chamber of the core body communicate with each other. In the type oil cooler, the sheet body has an annular flat inner peripheral portion around the central opening, and the inner diameter is larger than the outer diameter of the inner peripheral portion outside and above the inner peripheral portion. It has a large annular and flat outer periphery,
Further, the inner peripheral portion and the outer peripheral portion are connected by an inclined wall having a communication port formed so that a thick annular wall is arranged and joined between the outer peripheral lower surface of the seat plate and the upper end plate of the core body. A housingless oil cooler characterized by the above.