CN110617120A

CN110617120A - Oil cooler

Info

Publication number: CN110617120A
Application number: CN201910112390.4A
Authority: CN
Inventors: 李相俊
Original assignee: Hanon Systems Corp
Current assignee: Hanon Systems Corp
Priority date: 2018-06-19
Filing date: 2019-02-13
Publication date: 2019-12-27
Anticipated expiration: 2039-02-13
Also published as: KR20190142872A; CN110617120B; KR102562656B1

Abstract

The present invention relates to an oil cooler, comprising: a plurality of flow path plates which are laminated to form an oil flow portion for flowing oil and a cooling water flow portion for flowing cooling water; an upper plate and a lower plate coupled to the flow path plate; a mounting plate coupled to the upper plate; and a center pipe which is coupled to the upper plate, the plurality of flow passage plates, and the lower plate in a penetrating manner, wherein the upper end portion of the center pipe is inserted into a mounting groove formed in the mounting plate in a recessed manner and coupled to the mounting plate, and the center pipe is firmly coupled to the mounting plate in a vertical state.

Description

Oil cooler

Technical Field

The present invention relates to an oil cooler capable of cooling oil filled in an engine, a transmission, or the like of an automobile to achieve a lubricating effect and maintain airtightness.

Background

Generally, a vehicle is provided with not only an air conditioning system for supplying cool air to the interior of the vehicle but also a cooling system in the form of a heat exchanger such as a radiator or an oil cooler.

The oil cooler is a heat exchanger for cooling oil filled in an engine, a transmission, or the like of a vehicle to achieve a lubricating effect and maintain airtightness, and when the oil is overheated, the viscosity of the oil decreases to disable the lubricating effect and the airtightness maintaining function.

Here, the following means are widely used: the temperature of the oil flowing inside the oil cooler is relatively higher than the temperature of the cooling water flowing inside the radiator for cooling the engine, whereby heat exchange between the engine cooling water of the radiator and the oil of the oil cooler is achieved, and the oil is cooled.

In particular, in order to secure a space in an engine room and improve heat dissipation performance, a water-cooled oil cooler including an oil cooler in a radiator tank so that cooling water directly contacts an oil cooler body has been generally used, and an automotive oil cooler in which a plurality of plates are stacked to alternately form a cooling water flow portion through which the cooling water flows and an oil flow portion through which the oil flows is disclosed in korean laid-open patent No. 10-2010-0060638.

As shown in fig. 1, in the case of the conventional oil cooler 10, a plurality of plates 20 are stacked to alternately form a cooling water flow portion and an oil flow portion, and although not shown, a center pipe is coupled to penetrate the plates, and a hollow pipe-shaped coupling unit having a stopper portion formed in an outer side thereof in a protruding manner is inserted to be coupled to an engine block or the like so as to penetrate the center pipe, whereby the oil cooler is fixed to and communicated with the engine. In addition, the oil filter is coupled to the hollow pipe-shaped coupling unit and the oil cooler by connection.

In this case, one end of the center tube of the oil cooler is joined to a mounting plate disposed outermost in the direction in which the plates are stacked, and the mounting plate is formed in a flat plate shape, is brought into contact with one end of the center tube, and is joined by brazing or the like.

However, since the center pipe is joined to the mounting plate of the flat plate structure, when assembling the center pipe before joining by brazing, brazing failure is caused due to movement of the center pipe caused by play, and joining cannot be performed well. Further, a problem of the verticality of the center pipe with respect to the mounting plate is caused by the movement of the center pipe, and when the oil cooler is coupled to the engine block or the like by passing the coupling unit through the center pipe, the coupling unit may be loosened because the coupling unit cannot be coupled with a correct torque.

Documents of the prior art

Patent document

KR 10-2010-0060638A(2010.06.07)

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an oil cooler including: the plurality of plates are stacked to alternately form a cooling water flow portion for flowing cooling water and an oil flow portion for flowing oil, and the center pipe is coupled through the plates, wherein the center pipe is tightly coupled to the mounting plate disposed at the outermost side in the direction in which the plates are stacked, so that play of the center pipe before brazing can be prevented, and the verticality of the center pipe with respect to the mounting plate can be improved.

Means for solving the problems

In order to achieve the above object, an oil cooler of the present invention includes: a plurality of flow path plates 300 in which an oil flow portion 301 for flowing oil and a cooling water flow portion 302 for flowing cooling water are formed by stacking, and through holes 300a penetrating vertically are formed; an attachment plate 100 having a through hole 100a penetrating the upper and lower surfaces of the plate 110, a placement groove 150 recessed upward from the lower surface of the peripheral portion of the through hole 100a, and a flow path for oil flow formed by stacking the attachment plate 100 on the upper side of the flow path plates 300 stacked on top of each other; and a center pipe 600 inserted into the through holes 300a of the plurality of flow paths 300 and coupled thereto, and having an upper end inserted into the installation groove 150 and coupled thereto.

In addition, still include: and a cover plate 500 laminated on the lower side of the laminated flow path plates 300 to form a flow path for oil to flow therethrough, and having a through hole 500a penetrating the upper and lower surfaces thereof, whereby the lower end portion of the center tube 600 is inserted into and coupled to the through hole 500 a.

In addition, the mounting plate 100 includes: a plate 110 formed with a through hole 100a penetrating upper and lower surfaces; a first vertical portion 111 formed to extend upward from a peripheral portion of the through hole 100 a; and a first horizontal part 112 formed to extend from the first vertical part 111 toward the inside of the through hole 100a, and an upper end part of the center tube 600 is inserted into and coupled to the installation groove 150 formed by the first vertical part 111 and the first horizontal part 112.

The upper end of the center tube 600 is in surface contact with and coupled to the first vertical part 111 and the first horizontal part 112 of the mounting plate 100.

In addition, the mounting plate 100 further includes: and a second vertical part 113 formed to extend downward from the first horizontal part 112 to be spaced apart from the first vertical part 111, and an upper end of the center tube 600 is inserted into and coupled to a receiving groove 150 formed by the first vertical part 111, the first horizontal part 112, and the second vertical part 113.

The center tube 600 is formed with a stepped groove 610 recessed from an inner peripheral edge of an upper end thereof, and a protrusion 620 formed at an outer side of the stepped groove 610 in a radial direction is inserted into and coupled to the installation groove 150 of the mounting plate 100.

Further, the inner surface of the second vertical portion 113 of the attachment plate 100 is formed to be identical to or more outward than the inner circumferential surface of the center tube 600 in the radial direction.

In addition, a fixing groove 150-1 is formed in the installation groove 150 of the installation plate 100, a fixing protrusion 630 is formed at an upper end of the center pipe 600 in a protruding manner, and the fixing protrusion 630 is inserted into and coupled to the fixing groove 150-1.

The flow path plate 300 includes first and second plates 310 and 320, respectively, and the first and second plates 310 and 320 are alternately stacked in the height direction to alternately form an oil flow portion 301 for flowing oil and a cooling water flow portion 302 for flowing cooling water.

Further, the first plate 310 and the second plate 320 are respectively formed with a first communication hole 303, a second communication hole 304, a third communication hole 305, and a fourth communication hole 306 which vertically penetrate, the first communication hole 303 and the second communication hole 304 formed in the first plate 310 are formed such that their peripheries protrude in an upper direction, the third communication hole 305 and the fourth communication hole 306 are formed such that their peripheries protrude in a lower direction, the first communication hole 303 and the second communication hole 304 formed in the second plate 320 are formed such that their peripheries protrude in a lower direction, the third communication hole 305 and the fourth communication hole 306 are formed such that their peripheries protrude in an upper direction, the protruding portions of the corresponding communication holes of the first plate 310 and the second plate 320 are joined to each other, and an oil flow portion 301 is formed between the lower surface of the first plate 310 and the upper surface of the adjacent second plate 320, a cooling water flow portion 302 is formed between the lower surface of the second plate 320 and the upper surface of the adjacent first plate 310.

The inner pin 350 is provided between and coupled to the lower surface of the first plate 310 forming the oil flow portion 301 and the upper surface of the adjacent second plate 320.

In addition, it also includes: and an upper plate 200 having a through hole 200a penetrating vertically at a position corresponding to the through hole 300a of the flow path plate 300, and laminated and coupled to an upper end of the laminated flow path plate 300.

In addition, it also includes: and a lower plate 400 having a through hole 400a formed therein at a position corresponding to the through hole 300a of the flow channel plate 300 and vertically penetrating therethrough, and laminated and coupled to a lower end of the laminated flow channel plate 300.

Effects of the invention

The invention has the following advantages: the play of the center pipe that penetrates through the stacked plates forming the cooling water flow portion and the oil flow portion and is coupled to the mounting plate can be prevented, and thus, when the center pipe and the mounting plate are joined by brazing, a poor joint between the center pipe and the mounting plate can be prevented.

In addition, the following advantages are provided: since the center pipe can be vertically arranged with reference to the mounting plate, when the oil cooler is coupled to the engine block or the like by passing the coupling unit through the center pipe, the coupling unit can be coupled with a correct torque, and thus, oil leakage in the portion of the connection flow path can be prevented.

Drawings

Fig. 1 is a schematic view showing a conventional oil cooler.

Fig. 2 and 3 are an assembled perspective view and an exploded perspective view showing an oil cooler according to an embodiment of the present invention.

Fig. 4 and 5 are plan views showing oil flow paths and cooling water flow paths in a flow path plate of an oil cooler according to an embodiment of the present invention.

Fig. 6 is a sectional view showing an oil flow path formed by coupling an oil cooler to an engine through a coupling unit, coupling an oil filter to the coupling unit, and communicating the engine with the oil cooler and the oil filter according to an embodiment of the present invention.

Fig. 7 to 11 are views showing various embodiments of a mounting plate and a center tube in an oil cooler of the present invention.

(symbol description)

1000: oil cooler

100: mounting plate 100 a: through hole

110: plate 111: first vertical part

112: first horizontal portion 113: second vertical part

150: the arrangement groove is 150-1: fixing groove

160: oil inlet

200: upper plate 200 a: through hole

210: water inlet pipe 220: water outlet pipe

300: flow path plate 300 a: through hole

301: oil flow portion 302: cooling water flow part

303: first through-hole 304: second communication hole

305: third communication hole 306: fourth communication hole

308: the moving adjusting edge bead 309: protruding edge pressing rib

310: first plate 320: second plate

350: inner pin

400: lower plate 400 a: through hole

404: oil communicating hole

500: cover plate 500 a: through hole

510: oil drain port

600: central tube

610: step groove 620: projection part

630: fixing protrusion

1500: the coupling unit 1510: stop part

2000: engine

2100: oil inflow flow path 2200: oil discharge flow path

3000: oil filter

Detailed Description

The oil cooler of the present invention having the above-described configuration will be described in detail with reference to the drawings.

Fig. 2 and 3 are assembled and exploded perspective views illustrating an oil cooler according to an embodiment of the present invention, fig. 4 and 5 are plan views illustrating a flow path of oil and a flow path of cooling water on a flow path plate of the oil cooler according to the embodiment of the present invention, and fig. 6 is a cross-sectional view illustrating an oil flow path formed by coupling the oil cooler according to the embodiment of the present invention to an engine via a coupling unit, an oil filter coupled to the coupling unit, and the engine and the oil cooler and the oil filter communicating with each other.

As shown in the drawings, an oil cooler 1000 according to an embodiment of the present invention is mainly composed of a mounting plate 100, an upper plate 200, a plurality of flow path plates 300, a lower plate 400, and a center pipe 600. All the plates except the center pipe 600 are stacked and coupled in the above-described order from the upper side toward the lower side, and the cover plate 500 is further stacked and coupled on the lower side of the lower plate 400. Also, the center pipe 600 is completely coupled through all the plates except the mounting plate 100, and the upper end portion of the center pipe 600 is coupled to the mounting plate 100.

First, a plurality of flow passage plates 300 are stacked to form an oil flow portion 301 for flowing oil and a cooling water flow portion 302 for flowing cooling water, and through holes 300a penetrating vertically are formed in the flow passage plates 300.

More specifically, the flow path plate 300 is composed of, for example, a first plate 310 and a second plate 320, and the first plate 310 and the second plate 320 are alternately stacked in the height direction to alternately form an oil flow portion 301 for flowing oil and a cooling water flow portion 302 for flowing cooling water. The first plate 310 and the second plate 320 have first communication holes 303 and second communication holes 304 vertically penetrating so as to communicate with the oil flow portion 301, and have third communication holes 305 and fourth communication holes 306 vertically penetrating so as to communicate with the coolant flow portion 302. At this time, the first communication hole 303 and the second communication hole 304 formed in the first plate 310 are formed such that their peripheries protrude in the upper direction, the third communication hole 305 and the fourth communication hole 306 are formed such that their peripheries protrude in the lower direction, the first communication hole 303 and the second communication hole 304 formed in the second plate 320 have their peripheries formed to protrude downward, the third communication hole 305 and the fourth communication hole 306 have their peripheries formed to protrude upward, whereby the protruding portions of the corresponding communication holes of the first plate 310 and the second plate 320 are brought into contact with each other, and joined by brazing or the like, so that the oil flow portion 301 is formed between the lower surface of the first plate 310 and the upper surface of the adjacent second plate 320, the cooling water flow portion 302 is formed between the lower surface of the second plate 320 and the upper surface of the adjacent first plate 310. That is, the first plates 310 and the second plates 320 are alternately stacked in the height direction, and the oil flow path and the cooling water flow path are formed along the protruding direction of the first through holes 303 to the fourth through holes 306. In addition, the inner pins 350 for improving heat exchange efficiency are provided and coupled between the lower surface of the first plate 310 forming the oil flow portion 301 and the upper surface of the adjacent second plate 320.

The upper plate 200 is formed with a through hole 200a penetrating vertically, and the upper plate 200 is laminated and coupled to the upper end of the flow path plate 300 laminated such that the through hole 200a of the upper plate 200 is positioned at a position corresponding to the through hole 300a of the flow path plate 300. The upper plate 200 is coupled to the flow path plate 300 to form a flow path for oil to flow and a flow path for cooling water to flow. At this time, the upper plate 200 is formed with holes penetrating vertically at corresponding positions for oil to pass through, portions formed to protrude from the first and second communication holes 303 and 304 formed in the flow path plate 300 are inserted into the holes to communicate with each other, and holes penetrating vertically so as to communicate with the cooling water flow portion 302 are formed at corresponding positions in the upper plate 200 to pass through the cooling water. In addition, a water inlet pipe 210 through which cooling water flows and a water outlet pipe 220 through which cooling water is discharged after heat exchange with oil are coupled to a hole through which cooling water for the upper plate 200 passes.

The lower plate 400 has a through hole 400a penetrating vertically therethrough, and the lower plate 400 is laminated and coupled to the lower end of the flow channel plate 300 laminated such that the through hole 400a of the lower plate 400 is positioned at a position corresponding to the through hole 300a of the flow channel plate 300. And, the lower plate 400 is coupled to the flow path plate 300 to form a flow path for oil to flow. At this time, holes penetrating vertically in the lower plate 400 so as to communicate with the second communication holes 304 formed in the flow path plate 300 are formed at corresponding positions for oil to pass through, and holes are formed at corresponding positions in the lower plate 400 so as to be inserted from portions protruding from the third communication holes 305 and the fourth communication holes 306 through which the cooling water flows in the flow path plate 300.

The cover plate 500 is coupled to the lower side of the lower plate 400, and a drain port 510 for discharging oil is formed in the cover plate 500, and the drain port 510 communicates with the second communication hole 304 of the flow path plate 300.

The mounting plate 100 is formed with through holes 100a penetrating the upper and lower surfaces of the plate 110, and is laminated and coupled to the upper side of the upper plate 200 laminated such that the through holes 100a of the mounting plate 100 are positioned at positions corresponding to the through holes 300a of the flow path plate 300 and the through holes 200a of the upper plate 200. The mounting plate 100 is provided with a mounting groove 150 recessed upward from the lower surface of the peripheral portion of the through hole 100 a. In addition, an oil inlet 160 for inflow of oil is formed in the mounting plate 100, and the mounting plate 100 forms a flow path for flow of oil together with the upper plate 200.

Accordingly, the oil flowing into the oil inlet 160 formed in the mounting plate 100 is distributed to the oil flow portion 301 through the hole formed in the upper plate 200 and the first communication hole 303 formed in the flow path plate 300, flows, passes through the second communication hole 304 formed in the flow path plate 300 and the hole formed in the lower plate 400, and is discharged through the drain port 510 formed in the cover plate 500. The cooling water flowing into the water inlet pipe 210 coupled to the upper plate 200 is distributed to the cooling water flow portion 302 through the third communication hole 305 formed in the flow field plate 300, flows, passes through the fourth communication hole 306 formed in the flow field plate 300, and is discharged through the water outlet pipe 220 coupled to the upper plate 200. At this time, the oil having a relatively high temperature flowing along the oil flow portion 301 formed by the flow passage plate 300 exchanges heat with the cooling water having a relatively low temperature flowing along the cooling water flow portion 302, and is cooled by the cooling water oil.

Here, the center tube 600 is formed in a tubular shape, and is inserted into and coupled to the through holes 200a, 300a, and 400a formed in the upper plate 200, the plurality of flow path plates 300, the lower plate 400, and the cover plate 500. The upper end of the center tube 600 is inserted into the installation groove 150 formed in the attachment plate 100 and coupled thereto, and the outer peripheral surfaces of the upper end surface and the upper end of the center tube 600 are supported by the installation groove 150, whereby the center tube 600 is firmly coupled to the attachment plate 100.

Thus, the oil cooler of the present invention can prevent play of the center pipe that penetrates through the stacked plates forming the cooling water flow portion and the oil flow portion and is coupled to the mounting plate, and thus can prevent poor coupling between the center pipe and the mounting plate when the center pipe and the mounting plate are coupled by brazing.

As shown in fig. 6, the oil cooler 1000 of the present invention is coupled to the engine 2000, the transmission, and the like by the coupling unit 1500, and the coupling unit 1500 having the stopper 1510 formed on the lower side is inserted through the center tube 600 of the oil cooler 1000, whereby the upper side of the coupling unit 1500 is coupled to the engine 2000 and is fixed in a manner of sandwiching the oil cooler 1000 between the engine 2000 and the stopper 1510 of the coupling unit 1500. At this time, the oil inlet 160 of the oil cooler 1000 is connected to the oil inflow passage 2100 formed in the engine 2000, the coupling unit 1500 is formed in a pipe shape having a hollow interior and both open ends, and the upper end of the coupling unit 1500 is connected to the oil discharge passage 2200 of the engine 2000. An oil filter 3000 is coupled to a lower end portion of the coupling unit 1500, an oil inlet portion of the oil filter 3000 is connected to the drain port 510 of the oil cooler 1000, and an oil outlet portion of the oil filter 3000 is connected to a lower end portion of the coupling unit 1500. Accordingly, the oil having a high temperature flowing in from the engine 2000 is cooled by the oil cooler 1000, and then passes through the oil filter 3000 to filter impurities, and thus clean oil is returned to the engine 2000 side through the coupling unit 1500.

In this case, in the oil cooler of the present invention, since the center pipe can be accurately disposed vertically with respect to the mounting plate, the coupling unit can be coupled to the engine by a correct torque by passing the coupling unit through the center pipe by using the coupling unit, and thus there is an advantage in that oil leakage is prevented in a portion connecting the oil flow passage of the engine and the oil flow passage of the oil cooler.

First, referring to fig. 7, the mounting plate 100 includes a plate 110 having a through hole 100a penetrating through upper and lower surfaces thereof, a first vertical portion 111 extending upward from a peripheral portion of the through hole 100a, and a first horizontal portion 112 extending inward from the first vertical portion 111 toward the through hole 100a, and a mounting groove 150 is formed by recessing the first vertical portion 111 and the first horizontal portion 112 in an upward direction from a lower surface of the plate 110. Then, the upper end of the center pipe 600 is inserted into the installation groove 150 and coupled thereto. At this time, the first vertical portion 111 and the first horizontal portion 112 of the mounting plate 100 punch the plate 110 to partially perforate the through hole 100a, and the peripheral portion of the through hole 100a is punched to form the installation groove 150 recessed upward from the lower surface of the plate 110, and the first vertical portion 111 and the first horizontal portion 112 are formed to protrude upward from the upper surface of the plate 110.

Accordingly, the outer peripheral surface of the upper end portion of the center tube 600 is supported in contact with the inner surface of the first vertical portion 111 of the attachment plate 100, and the upper surface of the upper end portion of the center tube 600 is supported in contact with the lower surface of the first horizontal portion 112 of the attachment plate 100, whereby the center tube 600 is firmly coupled to the attachment plate 100 and fixed.

Referring to fig. 8, in the mounting plate 100, a second vertical portion 113 is formed extending downward from the first horizontal portion 112, and the first vertical portion 111 and the second vertical portion 113 are formed in parallel to each other in a spaced manner to face each other. The upper end of the center pipe 600 is inserted into and coupled to the seating groove 150 formed by the first vertical part 111 and the first and second horizontal parts 112 and 113. This supports the three surfaces of the upper end of the center tube 600, and therefore, the center tube 600 can be more firmly coupled and fixed to the attachment plate 100.

Referring to fig. 9, as described above, the mounting plate 100 is formed with the first vertical portion 1110, the first horizontal portion 112, and the second vertical portion 113. Further, the center tube 600 is recessed from the inner circumferential edge of the upper end to form the stepped groove 610, and thereby a protruding portion 620 protruding upward is formed inside the stepped groove 610 in the radial direction, and the protruding portion 620 is inserted into and coupled to the installation groove 150. This supports four surfaces of the upper end of the center tube 600.

At this time, the inner side surface of the second vertical portion 113 in the radial direction is formed to be the same as or positioned outside the inner circumferential surface of the center tube 600, so that the coupling unit 1500 is prevented from being caught by the second vertical portion 113 when the coupling unit 1500 is inserted into the center tube 600 from the lower side toward the upper side.

Referring to fig. 10 and 11, a fixing groove 150-1 recessed from the lower surface toward the upper side is formed in the first horizontal portion 112, which is a portion where the installation groove 150 of the installation plate 100 is formed, and a fixing protrusion 630 is formed to protrude from the upper surface toward the upper side of the center tube 600, so that the fixing protrusion 630 is inserted into and coupled to the fixing groove 150-1. At this time, the fixing groove 150-1 and the fixing protrusion 630 are formed in a plurality spaced apart from each other in the circumferential direction.

This can increase the coupling force between the mounting plate 100 and the center tube 600, and the center tube 600 is not rotated about the center axis in a state of being assembled to the mounting plate 100.

The present invention is not limited to the above-described embodiments, and its application range is obviously various, and it is obvious to those skilled in the art that various modifications can be made without departing from the gist of the present invention claimed in the claims.

Claims

1. An oil cooler, characterized in that it comprises:

a plurality of flow path plates (300) which are stacked to form an oil flow portion (301) for flowing oil and a cooling water flow portion (302) for flowing cooling water, and which are formed with through holes (300a) that penetrate vertically;

an attachment plate (100) in which a through-hole (100a) penetrating the upper and lower surfaces is formed in a plate (110), a placement groove (150) is formed by recessing the lower surface of the peripheral portion of the through-hole (100a) upward, and the attachment plate (100) is laminated on the upper side of the laminated flow path plate (300) to form a flow path for oil to flow; and

and a center pipe (600) which is inserted into and coupled to the through-holes (300a) of the plurality of flow path plates (300), and has an upper end portion inserted into and coupled to the installation groove (150).

2. The oil cooler according to claim 1, further comprising a cover plate (500), wherein the cover plate (500) is laminated on a lower side of the laminated flow path plate (300) to form a flow path for oil to flow, and a through hole (500a) is formed to penetrate upper and lower surfaces, whereby a lower end portion of the center tube (600) is inserted into the through hole (500a) and coupled.

3. The oil cooler according to claim 1,

the mounting plate (100) includes: a plate (110) having a through hole (100a) formed through the upper and lower surfaces; a first vertical part (111) formed to extend upward from the peripheral part of the through hole (100 a); and a first horizontal part (112) formed to extend from the first vertical part (111) toward the inside of the through-hole (100a),

the upper end of the center pipe (600) is inserted into and coupled to a mounting groove (150) formed by the first vertical part (111) and the first horizontal part (112).

4. The oil cooler according to claim 3,

the upper end of the center pipe (600) is joined to the first vertical part (111) and the first horizontal part (112) of the mounting plate (100) by surface contact.

5. The oil cooler according to claim 3,

the mounting plate (100) further includes a second vertical portion (113), the second vertical portion (113) extending downward from the first horizontal portion (112) and being spaced apart from the first vertical portion (111),

the upper end of the center pipe (600) is inserted into and coupled to a mounting groove (150) formed by the first vertical part (111), the first horizontal part (112), and the second vertical part (113).

6. The oil cooler according to claim 5,

the center pipe (600) is recessed from the inner periphery of the upper end to form a stepped groove (610), and a protrusion (620) formed outside the stepped groove (610) in the radial direction is inserted into and coupled to the installation groove (150) of the mounting plate (100).

7. The oil cooler according to claim 6,

the inner side surface of the second vertical portion (113) of the mounting plate (100) is formed to be the same as or outside the inner peripheral surface of the center pipe (600) in the radial direction.

8. The oil cooler according to claim 1,

a fixing groove (150-1) is formed in the installation groove (150) of the installation plate (100) and a fixing protrusion (630) is formed at the upper end of the center tube (600) in a protruding manner,

the fixing protrusion 630 is inserted into the fixing groove 150-1 and coupled thereto.

9. The oil cooler according to claim 1,

the flow path plate (300) is composed of a first plate (310) and a second plate (320),

the first plates (310) and the second plates (320) are alternately stacked in the height direction, and thereby oil flow portions (301) through which oil flows and cooling water flow portions (302) through which cooling water flows are alternately formed.

10. The oil cooler according to claim 9,

a first communication hole (303), a second communication hole (304), a third communication hole (305), and a fourth communication hole (306) which vertically penetrate the first plate (310) and the second plate (320) are formed, the first communication hole (303) and the second communication hole (304) formed in the first plate (310) are formed such that their peripheries protrude in the upper direction, the third communication hole (305) and the fourth communication hole (306) are formed such that their peripheries protrude in the lower direction, the first communication hole (303) and the second communication hole (304) formed in the second plate (320) are formed such that their peripheries protrude in the lower direction, and the third communication hole (305) and the fourth communication hole (306) are formed such that their peripheries protrude in the upper direction,

the protruding portions of the corresponding communication holes of the first plate (310) and the second plate (320) are joined to each other in contact with each other, an oil flow portion (301) is formed between the lower surface of the first plate (310) and the upper surface of the adjacent second plate (320), and a cooling water flow portion (302) is formed between the lower surface of the second plate (320) and the upper surface of the adjacent first plate (310).

11. The oil cooler according to claim 9,

the inner pin (350) is provided between the lower surface of the first plate (310) forming the oil flow section (301) and the upper surface of the adjacent second plate (320) and is joined thereto.

12. The oil cooler according to claim 1, further comprising an upper plate (200), wherein the upper plate (200) is formed with a through hole (200a) penetrating vertically at a position corresponding to the through hole (300a) of the flow path plate (300), and is laminated on and coupled to an upper end of the laminated flow path plate (300).

13. The oil cooler according to claim 1, further comprising a lower plate (400), wherein the lower plate (400) is formed with a through hole (400a) penetrating vertically at a position corresponding to the through hole (300a) of the flow path plate (300), and is laminated on and coupled to a lower end of the laminated flow path plate (300).