JP4722577B2 - Oil cooler - Google Patents

Description

  The present invention relates to an oil cooler, and more particularly to an oil cooler accommodated in a radiator tank.

Conventionally, a technique for accommodating an oil cooler in a radiator tank is known.
Such an oil cooler faces the passage through the heat exchange portion in which a passage is formed by stacking a plurality of the end portions of the element portion in communication with each other and the outermost end on one side of the heat exchange portion. And a patch plate provided facing the passage through the outermost element portion on the other side of the heat exchange portion.

Also, as shown in FIG. 20, the other outermost element portion 05b is mounted with a patch plate 013 with the sheet member S interposed in the lower shell 07 of the other element portion 05, or in FIG. As shown, a shell 07a having a shape different from that of the lower shell 07 is provided instead of the lower shell 07, and a patch plate 013 is attached thereto (see Patent Documents 1 and 2).
JP-A-11-212379 Japanese Patent Laid-Open No. 2002-195783

  However, in the former of the conventional inventions, it is necessary to interpose a sheet member in order to satisfactorily braze and fix the patch plate, and there is a problem that the number of parts and assembly man-hours increase.

  In the latter case, since the lower shell of the element part at the outermost side on the other side is a dedicated part, it is not possible to make all the element parts the same shape part, which increases the number of parts and increases the cost. There was a problem.

  The present invention has been made paying attention to the above-mentioned problems, and an object of the present invention is to provide an oil cooler that can fix a patch plate easily and stably while making all element parts the same shape. It is in.

In order to solve the above-mentioned problem, in the invention according to claim 1, a heat exchange part in which a passage is formed by stacking a plurality of elements in a state where the end parts of the element parts are in communication with each other, and an outermost part on one side of the heat exchange part. a connecting pipe provided to face said path through the element portion of the outer end, the oil cooler with a patch plate disposed facing the said passage through the element portion of the other side outermost end of the heat exchanger unit in, the element portion, the peripheral edge is constructed with shell on which is formed in a convex dish-shaped on one side, and a lower shell rim is formed in a convex dish-shaped on the other side, from the upper shell of a cylindrical portion projecting on one side on the end bottom to form, and can be inserted cylindrical portion in the cylindrical portion of the upper shell protrudes at the other side end portion the bottom of the lower shell, before Symbol PatchPlate in the elementary other hand side outermost A first annular portion of the annular abutting on the lower shell parts, the inner grooves capable of accommodating the annular said cylindrical portion of the lower shell, on the other hand was insertably formed in the cylindrical portion of the projecting lower shell side An annular second annular portion, and the cylindrical portion of the lower shell other than the element portion at the outermost end on the other side is enlarged in diameter and crimped to the cylindrical portion of the upper shell of the adjacent element In this way, the longitudinal ends of the adjacent element portions are in communication with each other, and the diameter of the second annular portion of the patch plate is increased, and the lower shell of the element portion at the outermost end on the other side is expanded. The patch plate is held in the heat exchange part by caulking to a cylindrical part .

  According to a second aspect of the present invention, in the oil cooler according to the first aspect, all the constituent members including the radiator tank are made of aluminum, and are integrally brazed and fixed in a state where all of them are temporarily assembled. To do.

  In the invention according to claim 1, a heat exchange portion in which a passage is formed by stacking a plurality of elements in a state where the end portions of the element portions are in communication with each other, and an element at one outermost end of the heat exchange portion In an oil cooler comprising: a connection pipe provided facing the passage through a portion; and a patch plate provided facing the passage through the outermost element portion on the other side of the heat exchange portion. Is formed by a pair of upper and lower shells formed in a dish shape, and by forming cylindrical portions protruding in the vertical direction at the ends of both shells, and by crimping the cylindrical portions of the adjacent element portions, The end portions of the element portion are in communication with each other, the annular first annular portion that contacts the lower shell of the element portion at the outermost side on the other side, and the lower shell All elements are provided with an annular inner groove that can accommodate the cylindrical portion and an annular second annular portion that expands the diameter and crimps the cylindrical portion of the lower shell to hold the patch plate to the heat exchange portion. The patch plate can be fixed easily and stably while the parts are the same shape parts.

  Hereinafter, examples of the oil cooler of the present invention will be described.

Example 1 will be described below.
1 is an overall view showing an oil cooler according to a first embodiment of the present invention, FIG. 2 is an enlarged exploded view (partially sectional view) of a main part of the first embodiment, and FIG. 3 is an enlarged sectional view of a main part of the first embodiment. 4 is a view showing a part of the inner fin of the first embodiment, FIG. 5 is a plan view of the locking member of the first embodiment, FIG. 6 is a sectional view taken along the line S6-S6 of FIG. 5, and FIG. The top view which shows the pipe connector of the present Example 1, FIG. 8 is the same front view, FIG. 9 is sectional drawing in the S9-S9 line | wire of FIG.

  10 is a plan view showing the patch plate of the first embodiment, FIG. 11 is a front view thereof, and FIG. 12 is a sectional view taken along line S12-S12 of FIG.

  FIGS. 13 to 18 are diagrams for explaining the temporary assembly of the oil cooler in the line S13-S13 in FIG. 3, and FIG. 19 is a diagram for explaining the accommodation of the oil cooler in the radiator tank in the line S13-S13 in FIG.

First, the overall configuration will be described.
As shown in FIGS. 1 to 3, the oil cooler A according to the first embodiment includes a heat exchanging portion 1, connection pipes 2 and 2, a side wall 3 of a radiator tank, and pipe connectors 4 and 4.
Since the oil cooler A of the first embodiment has a left-right symmetrical shape, only the left side connection pipe 2 side in FIG. 1 is mainly illustrated and described.

The heat exchange unit 1 is configured by alternately laminating a plurality of element units 5 and annular sheets S1, and each element unit 5 has shells 6 and 7 (shells 6 are formed in a substantially dish shape). The upper shell and the lower shell are respectively overlapped in the middle with the wavy inner fins 8 shown in FIG. 4 interposed therebetween.
In addition, although the offset fin is employ | adopted for the inner fin 8 of the present Example 1, it is not this limitation.

As shown in FIG. 2, cylindrical end portions 6a projecting upward are formed at both end portions of the shell 6, while cylindrical end portions 7a projecting downward are formed at both end portions of the shell 7. ing.
Further, the opening width of the cylindrical portion 6 a of the shell 6 is formed larger than the outer diameter width of the cylindrical portion 7 a of the shell 7, so that the cylindrical portion 7 a of the shell 7 of the adjacent element portion 5 is replaced with the cylindrical portion of the shell 6. It is possible to fix by caulking in a state fitted to 6a.

  In addition, each element portion 5 protrudes in the laminating direction and has a projection portion 9 for maintaining the interval between the adjacent element portions 5, and a dimple groove 10 that suppresses deformation of the element portion 5 when the oil cooler is brazed. Are formed along the longitudinal direction of the element portion 5.

  Therefore, as shown in FIG. 3, passages R <b> 1 are formed on both sides of the heat exchanging unit 1 so that both end portions of each element unit 5 communicate with each other.

  In addition, the cylindrical portion 6a of the shell 6 in the element portion 5a at the outermost end on one side of the heat exchange portion 1 is a lower portion of the substantially cylindrical locking member 11 shown in FIGS. 2, 5, and 6 with the sheet S1 interposed therebetween. The cylindrical seating plate 12 shown in FIG. 2 is secured by a plurality of (four in this embodiment) claw portions 11b that are fixed by crimping by the cylindrical portion 11a formed on the locking member 11. The outer peripheral lower step portion 12b is fixed by caulking.

  The connecting pipe 2 is formed with an enlarged diameter portion 2a in the middle of the lower portion thereof, and the enlarged diameter portion 2a is subjected to heat exchange while passing through a pipe mounting hole 3a provided in the side wall 3 of the radiator tank. It is attached to a pipe connector 4 provided facing the passage R1 of the part 1.

  As shown in FIGS. 7 to 9, the pipe connector 4 is formed in a substantially cylindrical shape, and at one end thereof, the pipe connector 4 is seated on the side wall 3 of the radiator tank in a state in which the enlarged diameter portion 2 a is accommodated, and the diameter of the pipe connector 4 is reduced. The first holding portion 4a for holding the connection pipe 2 by caulking so as to hold the outer periphery of the enlarged diameter portion 2a is provided, and the upper end of the seating plate 12 is enlarged on the other end side. A second holding portion 4b that holds the heat exchanging portion 1 via the locking member 11 is provided by bringing the portion 12a into contact with the side wall 3 of the radiator tank and crimping.

  In the first embodiment, the first holding part 4a of the pipe connector 4 is caulked so as to hold the outer periphery of the enlarged diameter part 2a of the connection pipe 2. However, a part of the enlarged diameter part 2a is partly connected to the pipe connector 4. A caulking structure that holds the outer periphery of the enlarged diameter portion 2a so as to be pressed by the pipe connector 4 from the side surface may be adopted.

Moreover, the 1st holding | maintenance part 4a of the present Example 1 is formed in the state divided into 8 by the eight notch grooves 4c, and, thereby, the adhesiveness with the enlarged diameter part 2a is improved.
Of course, the number of notches 4c formed is not limited to eight, and the length of the first holding portion 4a can be selected as appropriate.

  Moreover, the thickness of the 2nd holding | maintenance part 4b is considered to make the opening diameter of the pipe attachment hole 3a in the side wall 3 of a radiator tank as small as possible by forming it thinner than the 1st holding | maintenance part 4a.

  A substantially disk-shaped patch plate 13 that is caulked and fixed to the cylindrical portion 7 a of the shell 7 is attached to the element portion 5 b at the outermost end on the other side of the heat exchange portion 1.

  As shown in FIGS. 10 to 12, the patch plate 13 includes an annular first annular portion 13 a that contacts the shell 7 of the element portion 5 b, an annular inner groove 13 c that can accommodate the cylindrical portion 7 a of the shell 7, and an expansion. An annular second annular portion 13b is provided that retains the patch plate 13 in the heat exchanging portion 1 by diameter and crimping to the cylindrical portion 7a of the shell 7.

  Further, the second annular portion 13b of the patch plate 13 of the first embodiment is formed thinner than other portions, and is formed in a tapered shape that becomes slantingly upward as it goes radially outward.

  In addition, in the oil cooler A of the first embodiment, all the components including the side wall 3 of the radiator tank are made of aluminum, and the contact portion of each component is coated with a brazing material (brazing sheet) on at least one side. Yes.

The operation will be described below.
In order to temporarily assemble such an oil cooler A, first, as shown in FIG. 2, a pair of shells 6 and 7 are overlapped in an intermediate state with the inner fins 8 interposed therebetween, so that the element portion 5 The heat exchange section 1 is formed by laminating a plurality of sheets (5 layers in the first embodiment) alternately with the sheet S1.

Next, as shown in FIG. 13, on both sides of the heat exchanging portion 1, the patch plates 13 are respectively arranged on the element portion 5 b at the outermost end on the other side.
At this time, the cylindrical portion 7 a of the shell 7 of the element portion 5 b is in a state of being accommodated in the inner groove 13 c of the patch plate 13.

  Next, as shown in FIG. 14, on both sides of the heat exchanging portion 1, the cylindrical portion 7a of the shell 7 between the adjacent element portions 5 is expanded by press-fitting a punch P into the passage R1 from the element portion 5a side. At the same time, the diameter of the second annular portion 13b of the patch plate 13 is increased at the tip of the punch P and the portion is fixed to the cylindrical portion 7a of the shell 7 of the element portion 5b. Thus, the patch plate 13 is held in a state where the first annular portion 13a of the patch plate 13 is in contact with the shell 7 of the element portion 5b.

  Next, on both sides of the heat exchanging portion 1, the locking member 11 and the seating plate 12 are caulked and fixed to the element portion 5a at the outermost end on one side, and these three are fixed.

  Next, as shown in FIGS. 15 and 16, on both sides of the heat exchanging portion 1, the pipe connector 4 is inserted into the pipe mounting hole 3a so that the first holding portion 4a is seated on the side wall 3 of the radiator tank. By extending the diameter of the second holding portion 4b of the pipe connector 4 with the heat exchanging portion 1 facing the pipe mounting hole 3a, and fixing it to the upper peripheral portion 12a on the inner peripheral side of the seating plate 12, these three To fix.

  Next, as shown in FIGS. 17 and 18, the diameter-expanded portion 2a of the connection pipe 2 is reduced in diameter in a state of being accommodated in the first holding portion 4a of the pipe connector 4 so as to hold the outer periphery of the diameter-expanded portion 2a. By fixing by caulking, both are fixed and the temporary assembly of the oil cooler A is completed.

  At this time, the first holding portion 4a is in close contact with the enlarged-diameter portion 2a evenly by the notch groove 4c without deviation.

  Further, some gaps X1 and X2 are formed between the connection pipe 2 and the pipe connector 4, and both are fixed by caulking, so that the pipe connector 4 has various diameters (for example, 8φ to 8φ). 10φ) connection pipe 2 can be crimped and held.

  Moreover, since the connection pipe 2 is fixed using the pipe connector 4, it can respond to the connection pipe 2 of various diameters, and at the same time, the heat exchange part 1 is fixed to the side wall 3 of the radiator tank without using a separate member. it can.

  Here, in the conventional invention, in order to satisfactorily braze and fix the patch plate, it is necessary to interpose a sheet member, and there is a problem that the number of parts and assembly man-hours increase.

  In addition, when the lower shell of the element part at the outermost end on the other end side is used as a dedicated part, not all the element parts can be used as common parts, which increases the number of parts and increases costs. there were.

  On the other hand, in the oil cooler A of the first embodiment, as described above, the cylindrical portion 7a of the shell 7 of the element portion 5b is accommodated in the inner groove 13c of the patch plate 13, so that all the element portions 5 can be composed of parts having the same shape, and there is no possibility of increasing the number of parts.

  Further, the diameter of the second annular portion 13b of the patch plate 13 is increased and fixed to the cylindrical portion 7a of the shell 7 of the element portion 5b, thereby fixing the first annular portion 13a of the patch plate 13 to the shell of the element portion 5b. In order to hold the patch plate 13 in contact with the element 7, the patch plate 13 can be easily caulked and fixed to the heat exchanging part 1 by a process of caulking the element parts 5 to each other, and the element part 5b and the patch plate 13 is not required, and the number of parts and assembly man-hours can be reduced to improve productivity.

  The oil cooler A including the side wall 3 of the radiator tank temporarily assembled as described above is brazed and fixed integrally by being heat-treated in a heating furnace (not shown).

  Next, as shown in FIG. 19, the side wall 3 of the radiator tank is fitted with the remaining U-shaped side wall 14 of the radiator tank in a state in which the oil cooler A is accommodated to form a radiator tank body 15 having a rectangular cross section. Then, it is brazed and fixed again in a state where it is temporarily assembled with the core portion and the like constituting the radiator.

  In the first embodiment, the side wall 3 of the radiator tank and the oil cooler A are heat-processed and fixed by brazing, and then the oil cooler A is accommodated in the radiator tank and heat-treated together with each component of the radiator. Although the case of brazing and fixing has been described, the first heat treatment may be omitted.

  The oil cooler A configured as described above causes the engine or AT oil to flow from the connection pipe 2 on one side into the passage R1 of the heat exchange unit 1, and then circulates in the element portions 5 in the longitudinal direction. While flowing into the passage R <b> 1 on the other side connection pipe 2 side, the cooling circuit discharges heat from the inner fin 8 and the cooling water in the radiator tank for cooling and then discharges from the other connection pipe 2.

The effects will be described below.
As described above, in the oil cooler A of the first embodiment, the heat exchanging portion 1 in which the passage R1 is formed by stacking a plurality of the end portions of the element portion 5 in communication with each other, A connection pipe 2 provided facing the passage R1 through the outermost end on one side of the heat exchange unit 1, and a patch provided facing the passage R1 via the element portion 5b at the outermost end on the other side of the heat exchange unit 1 In an oil cooler provided with a plate 13, each element portion 5 is composed of a pair of upper and lower shells 6 and 7 whose peripheral edges are formed in a dish shape, and cylindrical portions projecting vertically at the ends of both shells 6 and 7 6a and 7a are formed, and the cylindrical portions 6a and 7a of the adjacent element portions 5 are crimped to make the end portions of the element portions 5 communicate with each other. Lower part of element part 5b A ring-shaped first annular portion 13 a that contacts the barrel 7, an annular inner groove 13 c that can accommodate the cylindrical portion 7 a of the lower shell 7, and a diameter-expanded portion that is crimped to the cylindrical portion 7 a of the lower shell 7. Since the annular second annular portion 13b for holding the patch plate in the heat exchange portion 1 is provided, the patch plate 13 can be fixed easily and stably while making all the element portions 5 the same shape.

  Moreover, since all the structural members including the side wall 3 of the radiator tank are made of aluminum and are integrally brazed and fixed in a state where all of them are temporarily assembled, there is no need to fix the connection pipe 2 in a subsequent process. Efficient oil cooler productivity can be achieved.

  Although the embodiments of the present invention have been described above, the specific configuration of the present invention is not limited to the embodiments, and the present invention includes any design changes that do not depart from the gist of the invention. It is.

  For example, in the first embodiment, the process of crimping the element parts 5 and the process of crimping the patch plate 13 to the element part 5b are performed in the same process using the punch P. It may be performed in a process.

1 is an overall view illustrating an oil cooler according to a first embodiment of the present invention. FIG. 2 is an enlarged exploded view (partial cross-sectional view) of a main part of the first embodiment. FIG. 3 is an enlarged cross-sectional view of a main part of the first embodiment. It is a figure which shows a part of inner fin of the present Example 1. FIG. It is a top view which shows the pipe connector of the present Example 1. It is a top view which shows the pipe connector of the present Example 1. It is a top view which shows the pipe connector of the present Example 1. It is a front view which shows the pipe connector of the present Example 1. FIG. It is sectional drawing in the S9-S9 line | wire of FIG. It is a top view which shows the patch plate of the present Example 1. FIG. It is a front view which shows the patch plate of the present Example 1. FIG. It is sectional drawing in the S12-S12 line | wire of FIG. It is a figure explaining the temporary assembly of the oil cooler in the S13-S13 line of FIG. It is a figure explaining the temporary assembly of the oil cooler in the S13-S13 line of FIG. It is a figure explaining the temporary assembly of the oil cooler in the S13-S13 line of FIG. It is a figure explaining the temporary assembly of the oil cooler in the S13-S13 line of FIG. It is a figure explaining the temporary assembly of the oil cooler in the S13-S13 line of FIG. It is a figure explaining the temporary assembly of the oil cooler in the S13-S13 line of FIG. FIG. 19 is a view for explaining the accommodation of the oil cooler in the radiator tank along the line S13-S13 in FIG. It is a principal part expanded sectional view of the conventional oil cooler. It is a principal part expanded sectional view of the conventional oil cooler.

Explanation of symbols

P Punch R1 Passage S1 Sheet X1, X2
DESCRIPTION OF SYMBOLS 1 Heat exchange part 2 Connection pipe 2a Expanded diameter part 3 Radiator tank wall part 3a Pipe attachment hole 4 Pipe connector 4a First holding part 4b Second holding part 4c Notch groove 5 Element part 5a, 5b (Outermost end) element Part 6 Shell (equivalent to upper shell)
7 Shell (equivalent to lower shell)
6a, 7a Cylindrical portion 8 Inner fin 9 Protruding portion 10 Dimple groove 11 Locking member 12 Seating plate 12a Inner peripheral side upper step portion 12b Outer peripheral side lower step portion 13 Patch plate 13a First annular portion 13b Second annular portion 13c Inner groove 14 Remaining letter-shaped side wall 15 Radiator tank body

Claims (2)

A heat exchange part in which a passage is formed by laminating a plurality of elements in a state where the end parts of the element part communicate with each other;
A connecting pipe provided to face said path through the element portion on one side outermost end of the heat exchanger,
An oil cooler with a patch plate disposed facing the said passage through the element portion of the other side outermost end of the heat exchanger,
The element portion, the peripheral edge is constructed with shell on which is formed in a convex dish-shaped on one side, and a lower shell rim is formed in a convex dish-shaped on the other side, from,
A cylindrical portion that protrudes to one side in the end bottom of the upper shell to form a insertable cylindrical portion in the cylindrical portion of the upper shell protrudes at the other side end portion the bottom of the lower shell,
Before SL patch plate, a first annular portion abutting annular to the lower shell of the element portion of the other side in the outermost end, and an inner groove capable of accommodating the annular said cylindrical portion of the lower shell, on one side a second annular portion of the annular insert can be formed in the cylindrical portion of the projecting lower shell, the provided
Longitudinal ends of adjacent element parts by expanding the diameter of the cylindrical part of the lower shell other than the element part at the outermost end of the other side and crimping the cylindrical part of the upper shell of the adjacent element While keeping them in communication,
The diameter of the second annular portion of the patch plate is increased, and the patch plate is held in the heat exchanging portion by crimping on the cylindrical portion of the lower shell of the element portion on the other outermost side. Oil cooler. The oil cooler according to claim 1, wherein
An oil cooler characterized in that all components including the radiator tank are made of aluminum, and are integrally brazed and fixed in a state where all of them are temporarily assembled.

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