JPH0596766U - Oil cooler - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an oil cooler that is detachably attached to an engine block and has a bypass valve having a simple structure, high reliability, and easy assembly. A casing containing a core is composed of a joined body of a bell-shaped main body and a dish-shaped base member, and an oil guide path is formed on an inner surface of the base member radially outward from a central portion. A bypass pipe penetrating the core intersects and is connected to the guide path, and a bypass valve is openably and closably installed at the intersection of the guide path. [Effect] When the core is clogged, the bypass valve is opened, and the oil that has flowed in through the oil inlet hole of the base member is immediately guided from the oil guide passage of the base member to the bypass pipe. Therefore, the bypass valve is passed in the shortest distance, and a highly reliable valve structure is formed. Along with that
The oil cooler has a simple structure and is easy to assemble.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a laminated oil cooler detachably attached to an outer surface of an engine block, and more particularly to a laminated oil cooler provided with a highly reliable bypass valve having a simple structure.

[0002]

[Prior Art]

 Most conventional oil coolers of this type have a core housed in a cylindrical casing, and the core is fastened and fixed to the engine block by bolts. The core is composed of a stack of many flat elements, oil is introduced into the element, and cooling water is circulated to the outer surface of the element. In such an oil cooler, when the element is clogged, the increase in the internal pressure is utilized to open the bypass valve to bypass the oil. Many of these bypass valves are provided inside the core, and the heat dissipation area of the core is reduced accordingly. In addition, various other methods have been proposed, but in each case, the distance that the oil that flows into the casing reaches the bypass valve is relatively long, and there are drawbacks such as lack of reliability, and the structure is complicated. There was a problem. Furthermore, the assembly of the oil cooler was troublesome, and there was a drawback that mass productivity was lacking.

[0003]

[Means for Solving the Problems]

 Therefore, the present invention adopts the following configuration in order to solve the above problems. The oil cooler of the present invention has a plurality of flat and hollow donut-shaped elements 1 through which cooling water flows. The fins 2 are interposed between the elements 1, and the plurality of elements are stacked by aligning the pair of cooling water communication holes 3 of the element 1 with each other, and the outer side of the element located at one end in the stacking direction. The communication hole is closed to form the core 4. Then, the core 4 is installed in the casing 5. The casing 5 is composed of a base member 6 and a casing body 9 which are formed in a dish shape having a hole in the center. The casing main body 9 has an oil outflow hole 7 at one end surface and has a bell shape, and a center pipe 8 is provided so as to project on the internal axis. The bell-shaped open end and the tip of the center pipe 8 are liquid-tightly connected to the peripheral edge and the central hole of the base member 6.

A pair of cooling water inlet / outlet pipes 10 are provided on the outer peripheral wall surface of the base member 6, an oil inflow hole 11 is provided on the outer surface of the base member 6, and the other ends of the cooling water inlet / outlet pipe 10 and the core 4 are provided. The cooling water communication hole 3 of the positioned element is communicated. Then, the oil flows between the outer circumference of the center pipe 8 and the center of the core 4, and the oil flows radially outward from the outer circumference of the element 1 and is guided to the oil outflow hole 7. Here, the feature of the present invention is that an oil guide path 12 is formed on the inner surface of the base member 6 radially outward from the center thereof. Then, a bypass pipe 13 penetrating the core in the stacking direction of the elements is connected to intersect with the oil guide passage 12, and a bypass valve 14 is internally installed to open and close at the intersection of the oil guide passage 12.

[0005]

[Action]

 When the core 4 is clogged, the internal pressure of the oil in the casing 5 increases, and the bypass valve 14 moves to connect the oil guide passage 12 and the bypass pipe 13. Then, the oil that has flowed in through the oil inflow hole 11 of the base member 6 is immediately bypassed via the oil guide path 12 and the bypass pipe 13. Therefore, the bypass structure has a simple structure and high reliability.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical cross-sectional view of an oil cooler of the present invention, and FIG. 2 is a vertical cross-sectional view of a bypass structure showing a main part thereof. FIG. 3 is a longitudinal sectional view of the base member 6 provided with the bypass valve and is a sectional view taken along the line AA of FIG. 4 is a plan view of the base member 6, FIG. 5 is a vertical cross-sectional view showing the installed state of the oil cooler of the present invention, taken along the line BB in FIG. 4, and FIG. 6 is this oil cooler. 9 is a fragmentary perspective view of an element used for the heat exchanger, FIG. 7 is an explanatory view of circulation of cooling water inside the element, FIG. 8 is an explanatory view showing a circulation state of oil flowing through the fins 2 provided on the outer surface side of the element, FIG. FIG. 4 is a plan view of a casing 5 of the present oil cooler. As shown in FIG. 1, the main part of this oil cooler comprises a casing 5, a core 4 installed therein, and a center bolt 24 for detachably attaching the casing 5 to an engine block. The casing 5 comprises a casing main body 9 composed of a bell-shaped member and a center pipe 8 provided on the central axis thereof, and the open ends of the casing main body 9 are liquid-tight in the peripheral portion and the central portion of the base member 6, respectively. It is connected.

The base member 6 is formed in a dish shape as shown in FIGS. 3 and 4, and is provided with a partition wall 15 so as to form a pair of cooling water reservoirs 16 therein. A wide partition wall portion 17 for partitioning is integrally formed so as to project. In this embodiment, the base member 6 is made of cast aluminum and has through holes communicating with the respective cooling water reservoirs 16 formed on the outer peripheral wall surface, and the cooling water inlet / outlet pipe 10 is liquid-tight in the through holes. Connection is fixed. Further, as shown in FIGS. 2 to 4, the oil guide path 12 extends through the wide partition wall portion 17 in the radial direction. The center-side open end of the oil guide path 12 is formed in a slightly stepped manner, and the stopper surface 33 of the bypass valve 14 is formed in the stepped portion. Then, a T-shaped communication hole for the bypass pipe 13 is bored at a position slightly outside the stepped portion in the radial direction, and the tip of the bypass pipe 13 is liquid-tightly joined thereto. A bypass valve 14 and a coil spring 19 are installed in the oil guide passage 12, and a spring seat plug 18 is detachably screwed to the oil guide passage 12 which is open to the outer peripheral surface of the base member 6. An O-ring 28 is interposed between the head 29 of the valve seat plug 18 and the opening edge of the oil guide path 12 to form a liquid-tight structure. One end of the coil spring 19 is seated on the tip of the head portion 29, and the other end urges the bypass valve 14 to the left in the drawing. As a result, the tip end surface of the bypass valve 14 contacts the stopper surface 33 and closes the T-shaped intersection between the oil guide path 12 and the bypass pipe 13.

Next, the core 4 is composed of a laminated body of the element 1 and the fin 2 which are formed by reversing a pair of dish-shaped metal plates as shown in FIG. Each of the metal plates forming the element 1 is formed in a dish shape having a hole in the center, and a flange portion is provided on the hole edge portion and the outer peripheral surface, and a partition portion 22 is provided between the flange portion and the center hole. Is formed. A hole 34 through which the bypass pipe penetrates is formed at the center of the partition 22. Further, a pair of cooling water communication holes 3 are formed on both sides of the partition portion 22, and the hole edge portions are bulged outward. The pair of metal plates thus formed are stacked in opposite directions, and the contacting flange portion and the partition portion 22 are liquid-tightly joined to each other to form the element 1. Such an element 1 is laminated via a plurality of fins 2 and the hole edges of the cooling water communication holes 3 are liquid-tightly joined. Then, the fins 2 are arranged between the respective elements, and both surfaces of the fins 2 are joined to the outer surface of the element 1.

As shown in FIG. 1, an upper end closing plate 30 and a lower end closing plate 31 are arranged at both ends of the stack of the element 1 and the fin 2 in the stacking direction. As shown in FIG. 5, holes are bored in the lower end closing plate 31 at positions aligned with the cooling water reservoirs 16 of the base member 6, and the cooling water is circulated therein from the cooling water communication holes 3 of the respective elements. Is configured as follows. A plurality of oil inflow holes 11 are formed on the bottom surface of the base member 6 as shown in FIG. An oil outflow hole 7 is formed on the upper surface of the central portion of the casing body 9 as shown in FIGS. As an example, such an oil cooler can be assembled as follows. First, the core 4 is arranged on the base member 6 via the lower end closing plate 31, and the upper end closing plate 30 is seated on the upper surface thereof. Then, the bypass pipe 13 penetrating the core 4, the upper end closing plate 30, and the lower end closing plate 31 is arranged. Next, the assembly in which the lower end of the center pipe 8 is fitted to the base member 6 is inserted into a high-temperature furnace, the brazing material coated on the surface of at least one of the parts in advance is melted, and the contact portions are fixed by brazing. To do. Next, a bell-shaped casing main body 9 is fitted, and the opening end and the central portion thereof are liquid-tightly joined by TIG welding or the like. Next, the bypass valve 14 and the coil spring 19 are inserted from the open end of the oil guide path 12, and the spring seat plug 18 is screwed and fastened to the open end to complete the oil cooler. Then, with the center bolt 24, it is fastened and fixed to the engine block 23 through the O-ring 28 as shown in FIG. The inside of the center bolt 24 is made of a hollow body and forms a return path for oil.

A hose communicating with engine cooling water is connected to the pair of cooling water inlet / outlet pipes 10 of the oil cooler thus constructed. Then, the cooling water is circulated from one cooling water inlet / outlet pipe 10 through the cooling water communicating hole 3 of each element into the element as shown in FIG. 7, and is guided from the other cooling water communicating hole 3 to the other cooling water inlet / outlet pipe 10. .. Further, the oil 26 flows from the opening of the engine block 23 through the oil inflow hole 11 of the base member 6 as shown in FIG. 5, and flows in between the core 4 and the center pipe 8, and the outer surface of each element is radiated as shown in FIG. It circulates outward, then rises between the outer periphery of the core 4 and the inner peripheral surface of the casing body 9 as shown in FIG. 5, enters the hollow of the center bolt 24 from the oil outflow hole 7, and flows back to the engine block 23. .. When the fins 2 of the core 4 are clogged, the internal pressure of the oil in the casing increases and the bypass valve 14 moves to the right in FIG. 1, and the oil guide path 12 and the bypass pipe 13 communicate with each other. Then, the oil 26 flowing in from the oil inflow hole 11 immediately flows through the oil outflow hole 7 into the hollow of the center bolt 24 through the oil guide passage 12 and the bypass pipe 13 without passing through the core, and is bypassed.

[0011]

[Effect of the device]

 In the oil cooler of the present invention, the casing 5 that houses the core 4 is formed by joining the base member 6 and the casing body 9 together. An oil guide path 12 is formed on the inner surface of the base member 6 radially outward from the center, and a bypass pipe 13 penetrating the core 4 is connected to the oil guide path 12 so as to cross the oil guide path 12. It has a structure in which a bypass valve 14 is internally opened and closed at the intersection. Therefore, the bypass valve 14 can be easily attached and the entire oil cooler can be easily assembled. At the same time, since the oil guide path 12 is provided in the base member 6 itself, the oil that has flowed in from the oil inlet hole 11 on the bottom surface of the base member 6 can pass through the bypass valve 14 in the shortest distance. The oil cooler has a highly reliable bypass valve.

[Brief description of drawings]

1 is a vertical sectional view of an oil cooler of the present invention, which is a sectional view taken along the line AA in FIG.

FIG. 2 is a vertical cross-sectional view showing a main part of the oil cooler of the present invention.

FIG. 3 is a vertical sectional view of a base member 6 having the same main portion.

FIG. 4 is a plan view of the base member 6.

5 is a vertical cross-sectional view showing a usage state of the oil cooler of the present invention, which is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is an exploded perspective view of an element 1 forming a core of the oil cooler of the present invention.

FIG. 7 is an explanatory view showing the flow of cooling water in the element 1.

FIG. 8: Oil 26 flowing on the element outer surface side of the core 4
Explanatory drawing of.

FIG. 9 is a plan view of the casing 5.

[Explanation of symbols]

 1 Element 2 Fin 3 Cooling Water Communication Hole 4 Core 5 Casing 6 Base Member 7 Oil Outflow Hole 8 Center Pipe 9 Casing Body 10 Cooling Water Inlet / Out Pipe 11 Oil Inflow Hole 12 Oil Induction Path 13 Bypass Pipe 14 Bypass Valve 15 Partition 16 Cooling Water Reservoir 17 Wide bulkhead 18 Spring seat plug 19 Coil spring 22 Partition 23 Engine block 24 Center bolt 25 Rib 26 Oil 27 Cooling water 28 O-ring 29 Head 30 Upper end blocking plate 31 Lower end blocking plate 32 Cooling water flow path 33 Stopper surface 34 Hole

Claims (2)

[Scope of utility model registration request] 1. A plurality of flat and hollow donut-shaped elements (1) in which cooling water circulates are provided inside, and fins (2) are respectively interposed between the elements, and each element ( The core (4) in which the plurality of elements are stacked by aligning the pair of cooling water communication holes (3) of 1) with each other, and the communication holes outside the elements located at one end in the stacking direction are closed. And a casing (5) in which the core (4) is installed. The casing (5) has a dish-shaped base member (6) having a hole in the center, and an oil outflow at one end surface. A bell-shaped center pipe (8) having a hole (7) is provided so as to project on the inner axis, and the bell-shaped open end and the tip of the center pipe (8) are in the peripheral edge and the center hole of the base member (6). Liquid-tightly connected casein A main body (9), a pair of cooling water inlet and outlet pipes (10) are provided on the outer peripheral wall surface of the base member (6), and an oil inflow hole (11) is provided on the bottom surface of the base member (6), The cooling water inlet / outlet pipe (10) and the cooling water communication hole (3) of the element located at the other end of the core (4) are communicated with each other, and oil is applied to the outer periphery of the center pipe (8) and the core (4). ) With the center of each of the elements (1)
An oil cooler configured to flow radially outward from the center of the outer circumference and be guided to the oil outflow hole (7), wherein the inner surface of the base member (6) is radially outward from the center. An oil guide path (12) is formed in the bypass pipe (13) that penetrates the core in the stacking direction of the elements.
Are crossed and connected to the taxiway (12), and the taxiway (1
An oil cooler in which a bypass valve (14) is openably and closably installed at the intersection of (2). 2. The base member (6) according to claim 1, wherein the base member (6) is an integrally molded body of casting, and a pair of cooling water reservoirs (16) surrounded by partition walls (15) is provided on the inner surface of the cast member. A wide partition wall (17) for partitioning between the two reservoirs is arranged in the radial direction, and one end of the pair of cooling water inlet / outlet pipes (10) and the cooling of the core (4) are provided in the pair of both cooling water reservoirs (16). The water communication hole (3) is fluid-tightly communicated, the wide partition wall (17) is provided with the oil guide path (12), one end of which opens toward the center pipe (8) and the other end of which opens. Is opened to the outer peripheral wall surface, one end of the bypass pipe (13) is liquid-tightly connected to the middle of the guide passage (12), and the spring seat plug (18) is attached to and detached from the opening of the outer peripheral wall surface. The other end of the coil spring (19), which is freely attached and has one end seated on the plug, is the bypass. The bypass valve (14) is arranged to elastically press the (14) and moves the bypass valve (14) to the plug (18) side when the internal pressure of the oil rises, and the bypass pipe (13) and the oil guide path (12). ) An oil cooler configured to communicate with.